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bed92eae AJ |
1 | /* |
2 | * Copyright (C) 2011 STRATO. 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 | ||
19 | #include <linux/sched.h> | |
20 | #include <linux/pagemap.h> | |
21 | #include <linux/writeback.h> | |
22 | #include <linux/blkdev.h> | |
23 | #include <linux/rbtree.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/workqueue.h> | |
55e301fd | 26 | #include <linux/btrfs.h> |
bed92eae AJ |
27 | |
28 | #include "ctree.h" | |
29 | #include "transaction.h" | |
30 | #include "disk-io.h" | |
31 | #include "locking.h" | |
32 | #include "ulist.h" | |
bed92eae | 33 | #include "backref.h" |
2f232036 | 34 | #include "extent_io.h" |
bed92eae AJ |
35 | |
36 | /* TODO XXX FIXME | |
37 | * - subvol delete -> delete when ref goes to 0? delete limits also? | |
38 | * - reorganize keys | |
39 | * - compressed | |
40 | * - sync | |
bed92eae AJ |
41 | * - copy also limits on subvol creation |
42 | * - limit | |
43 | * - caches fuer ulists | |
44 | * - performance benchmarks | |
45 | * - check all ioctl parameters | |
46 | */ | |
47 | ||
48 | /* | |
49 | * one struct for each qgroup, organized in fs_info->qgroup_tree. | |
50 | */ | |
51 | struct btrfs_qgroup { | |
52 | u64 qgroupid; | |
53 | ||
54 | /* | |
55 | * state | |
56 | */ | |
57 | u64 rfer; /* referenced */ | |
58 | u64 rfer_cmpr; /* referenced compressed */ | |
59 | u64 excl; /* exclusive */ | |
60 | u64 excl_cmpr; /* exclusive compressed */ | |
61 | ||
62 | /* | |
63 | * limits | |
64 | */ | |
65 | u64 lim_flags; /* which limits are set */ | |
66 | u64 max_rfer; | |
67 | u64 max_excl; | |
68 | u64 rsv_rfer; | |
69 | u64 rsv_excl; | |
70 | ||
71 | /* | |
72 | * reservation tracking | |
73 | */ | |
74 | u64 reserved; | |
75 | ||
76 | /* | |
77 | * lists | |
78 | */ | |
79 | struct list_head groups; /* groups this group is member of */ | |
80 | struct list_head members; /* groups that are members of this group */ | |
81 | struct list_head dirty; /* dirty groups */ | |
82 | struct rb_node node; /* tree of qgroups */ | |
83 | ||
84 | /* | |
85 | * temp variables for accounting operations | |
86 | */ | |
87 | u64 tag; | |
88 | u64 refcnt; | |
89 | }; | |
90 | ||
91 | /* | |
92 | * glue structure to represent the relations between qgroups. | |
93 | */ | |
94 | struct btrfs_qgroup_list { | |
95 | struct list_head next_group; | |
96 | struct list_head next_member; | |
97 | struct btrfs_qgroup *group; | |
98 | struct btrfs_qgroup *member; | |
99 | }; | |
100 | ||
b382a324 JS |
101 | static int |
102 | qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid, | |
103 | int init_flags); | |
104 | static void qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info); | |
2f232036 | 105 | |
58400fce | 106 | /* must be called with qgroup_ioctl_lock held */ |
bed92eae AJ |
107 | static struct btrfs_qgroup *find_qgroup_rb(struct btrfs_fs_info *fs_info, |
108 | u64 qgroupid) | |
109 | { | |
110 | struct rb_node *n = fs_info->qgroup_tree.rb_node; | |
111 | struct btrfs_qgroup *qgroup; | |
112 | ||
113 | while (n) { | |
114 | qgroup = rb_entry(n, struct btrfs_qgroup, node); | |
115 | if (qgroup->qgroupid < qgroupid) | |
116 | n = n->rb_left; | |
117 | else if (qgroup->qgroupid > qgroupid) | |
118 | n = n->rb_right; | |
119 | else | |
120 | return qgroup; | |
121 | } | |
122 | return NULL; | |
123 | } | |
124 | ||
125 | /* must be called with qgroup_lock held */ | |
126 | static struct btrfs_qgroup *add_qgroup_rb(struct btrfs_fs_info *fs_info, | |
127 | u64 qgroupid) | |
128 | { | |
129 | struct rb_node **p = &fs_info->qgroup_tree.rb_node; | |
130 | struct rb_node *parent = NULL; | |
131 | struct btrfs_qgroup *qgroup; | |
132 | ||
133 | while (*p) { | |
134 | parent = *p; | |
135 | qgroup = rb_entry(parent, struct btrfs_qgroup, node); | |
136 | ||
137 | if (qgroup->qgroupid < qgroupid) | |
138 | p = &(*p)->rb_left; | |
139 | else if (qgroup->qgroupid > qgroupid) | |
140 | p = &(*p)->rb_right; | |
141 | else | |
142 | return qgroup; | |
143 | } | |
144 | ||
145 | qgroup = kzalloc(sizeof(*qgroup), GFP_ATOMIC); | |
146 | if (!qgroup) | |
147 | return ERR_PTR(-ENOMEM); | |
148 | ||
149 | qgroup->qgroupid = qgroupid; | |
150 | INIT_LIST_HEAD(&qgroup->groups); | |
151 | INIT_LIST_HEAD(&qgroup->members); | |
152 | INIT_LIST_HEAD(&qgroup->dirty); | |
153 | ||
154 | rb_link_node(&qgroup->node, parent, p); | |
155 | rb_insert_color(&qgroup->node, &fs_info->qgroup_tree); | |
156 | ||
157 | return qgroup; | |
158 | } | |
159 | ||
4082bd3d | 160 | static void __del_qgroup_rb(struct btrfs_qgroup *qgroup) |
bed92eae | 161 | { |
bed92eae AJ |
162 | struct btrfs_qgroup_list *list; |
163 | ||
bed92eae | 164 | list_del(&qgroup->dirty); |
bed92eae AJ |
165 | while (!list_empty(&qgroup->groups)) { |
166 | list = list_first_entry(&qgroup->groups, | |
167 | struct btrfs_qgroup_list, next_group); | |
168 | list_del(&list->next_group); | |
169 | list_del(&list->next_member); | |
170 | kfree(list); | |
171 | } | |
172 | ||
173 | while (!list_empty(&qgroup->members)) { | |
174 | list = list_first_entry(&qgroup->members, | |
175 | struct btrfs_qgroup_list, next_member); | |
176 | list_del(&list->next_group); | |
177 | list_del(&list->next_member); | |
178 | kfree(list); | |
179 | } | |
180 | kfree(qgroup); | |
4082bd3d | 181 | } |
bed92eae | 182 | |
4082bd3d WS |
183 | /* must be called with qgroup_lock held */ |
184 | static int del_qgroup_rb(struct btrfs_fs_info *fs_info, u64 qgroupid) | |
185 | { | |
186 | struct btrfs_qgroup *qgroup = find_qgroup_rb(fs_info, qgroupid); | |
187 | ||
188 | if (!qgroup) | |
189 | return -ENOENT; | |
190 | ||
191 | rb_erase(&qgroup->node, &fs_info->qgroup_tree); | |
192 | __del_qgroup_rb(qgroup); | |
bed92eae AJ |
193 | return 0; |
194 | } | |
195 | ||
196 | /* must be called with qgroup_lock held */ | |
197 | static int add_relation_rb(struct btrfs_fs_info *fs_info, | |
198 | u64 memberid, u64 parentid) | |
199 | { | |
200 | struct btrfs_qgroup *member; | |
201 | struct btrfs_qgroup *parent; | |
202 | struct btrfs_qgroup_list *list; | |
203 | ||
204 | member = find_qgroup_rb(fs_info, memberid); | |
205 | parent = find_qgroup_rb(fs_info, parentid); | |
206 | if (!member || !parent) | |
207 | return -ENOENT; | |
208 | ||
209 | list = kzalloc(sizeof(*list), GFP_ATOMIC); | |
210 | if (!list) | |
211 | return -ENOMEM; | |
212 | ||
213 | list->group = parent; | |
214 | list->member = member; | |
215 | list_add_tail(&list->next_group, &member->groups); | |
216 | list_add_tail(&list->next_member, &parent->members); | |
217 | ||
218 | return 0; | |
219 | } | |
220 | ||
221 | /* must be called with qgroup_lock held */ | |
222 | static int del_relation_rb(struct btrfs_fs_info *fs_info, | |
223 | u64 memberid, u64 parentid) | |
224 | { | |
225 | struct btrfs_qgroup *member; | |
226 | struct btrfs_qgroup *parent; | |
227 | struct btrfs_qgroup_list *list; | |
228 | ||
229 | member = find_qgroup_rb(fs_info, memberid); | |
230 | parent = find_qgroup_rb(fs_info, parentid); | |
231 | if (!member || !parent) | |
232 | return -ENOENT; | |
233 | ||
234 | list_for_each_entry(list, &member->groups, next_group) { | |
235 | if (list->group == parent) { | |
236 | list_del(&list->next_group); | |
237 | list_del(&list->next_member); | |
238 | kfree(list); | |
239 | return 0; | |
240 | } | |
241 | } | |
242 | return -ENOENT; | |
243 | } | |
244 | ||
245 | /* | |
246 | * The full config is read in one go, only called from open_ctree() | |
247 | * It doesn't use any locking, as at this point we're still single-threaded | |
248 | */ | |
249 | int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info) | |
250 | { | |
251 | struct btrfs_key key; | |
252 | struct btrfs_key found_key; | |
253 | struct btrfs_root *quota_root = fs_info->quota_root; | |
254 | struct btrfs_path *path = NULL; | |
255 | struct extent_buffer *l; | |
256 | int slot; | |
257 | int ret = 0; | |
258 | u64 flags = 0; | |
b382a324 | 259 | u64 rescan_progress = 0; |
bed92eae AJ |
260 | |
261 | if (!fs_info->quota_enabled) | |
262 | return 0; | |
263 | ||
1e8f9158 WS |
264 | fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS); |
265 | if (!fs_info->qgroup_ulist) { | |
266 | ret = -ENOMEM; | |
267 | goto out; | |
268 | } | |
269 | ||
bed92eae AJ |
270 | path = btrfs_alloc_path(); |
271 | if (!path) { | |
272 | ret = -ENOMEM; | |
273 | goto out; | |
274 | } | |
275 | ||
276 | /* default this to quota off, in case no status key is found */ | |
277 | fs_info->qgroup_flags = 0; | |
278 | ||
279 | /* | |
280 | * pass 1: read status, all qgroup infos and limits | |
281 | */ | |
282 | key.objectid = 0; | |
283 | key.type = 0; | |
284 | key.offset = 0; | |
285 | ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 1); | |
286 | if (ret) | |
287 | goto out; | |
288 | ||
289 | while (1) { | |
290 | struct btrfs_qgroup *qgroup; | |
291 | ||
292 | slot = path->slots[0]; | |
293 | l = path->nodes[0]; | |
294 | btrfs_item_key_to_cpu(l, &found_key, slot); | |
295 | ||
296 | if (found_key.type == BTRFS_QGROUP_STATUS_KEY) { | |
297 | struct btrfs_qgroup_status_item *ptr; | |
298 | ||
299 | ptr = btrfs_item_ptr(l, slot, | |
300 | struct btrfs_qgroup_status_item); | |
301 | ||
302 | if (btrfs_qgroup_status_version(l, ptr) != | |
303 | BTRFS_QGROUP_STATUS_VERSION) { | |
efe120a0 FH |
304 | btrfs_err(fs_info, |
305 | "old qgroup version, quota disabled"); | |
bed92eae AJ |
306 | goto out; |
307 | } | |
308 | if (btrfs_qgroup_status_generation(l, ptr) != | |
309 | fs_info->generation) { | |
310 | flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
efe120a0 FH |
311 | btrfs_err(fs_info, |
312 | "qgroup generation mismatch, " | |
313 | "marked as inconsistent"); | |
bed92eae AJ |
314 | } |
315 | fs_info->qgroup_flags = btrfs_qgroup_status_flags(l, | |
316 | ptr); | |
b382a324 | 317 | rescan_progress = btrfs_qgroup_status_rescan(l, ptr); |
bed92eae AJ |
318 | goto next1; |
319 | } | |
320 | ||
321 | if (found_key.type != BTRFS_QGROUP_INFO_KEY && | |
322 | found_key.type != BTRFS_QGROUP_LIMIT_KEY) | |
323 | goto next1; | |
324 | ||
325 | qgroup = find_qgroup_rb(fs_info, found_key.offset); | |
326 | if ((qgroup && found_key.type == BTRFS_QGROUP_INFO_KEY) || | |
327 | (!qgroup && found_key.type == BTRFS_QGROUP_LIMIT_KEY)) { | |
efe120a0 | 328 | btrfs_err(fs_info, "inconsitent qgroup config"); |
bed92eae AJ |
329 | flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
330 | } | |
331 | if (!qgroup) { | |
332 | qgroup = add_qgroup_rb(fs_info, found_key.offset); | |
333 | if (IS_ERR(qgroup)) { | |
334 | ret = PTR_ERR(qgroup); | |
335 | goto out; | |
336 | } | |
337 | } | |
338 | switch (found_key.type) { | |
339 | case BTRFS_QGROUP_INFO_KEY: { | |
340 | struct btrfs_qgroup_info_item *ptr; | |
341 | ||
342 | ptr = btrfs_item_ptr(l, slot, | |
343 | struct btrfs_qgroup_info_item); | |
344 | qgroup->rfer = btrfs_qgroup_info_rfer(l, ptr); | |
345 | qgroup->rfer_cmpr = btrfs_qgroup_info_rfer_cmpr(l, ptr); | |
346 | qgroup->excl = btrfs_qgroup_info_excl(l, ptr); | |
347 | qgroup->excl_cmpr = btrfs_qgroup_info_excl_cmpr(l, ptr); | |
348 | /* generation currently unused */ | |
349 | break; | |
350 | } | |
351 | case BTRFS_QGROUP_LIMIT_KEY: { | |
352 | struct btrfs_qgroup_limit_item *ptr; | |
353 | ||
354 | ptr = btrfs_item_ptr(l, slot, | |
355 | struct btrfs_qgroup_limit_item); | |
356 | qgroup->lim_flags = btrfs_qgroup_limit_flags(l, ptr); | |
357 | qgroup->max_rfer = btrfs_qgroup_limit_max_rfer(l, ptr); | |
358 | qgroup->max_excl = btrfs_qgroup_limit_max_excl(l, ptr); | |
359 | qgroup->rsv_rfer = btrfs_qgroup_limit_rsv_rfer(l, ptr); | |
360 | qgroup->rsv_excl = btrfs_qgroup_limit_rsv_excl(l, ptr); | |
361 | break; | |
362 | } | |
363 | } | |
364 | next1: | |
365 | ret = btrfs_next_item(quota_root, path); | |
366 | if (ret < 0) | |
367 | goto out; | |
368 | if (ret) | |
369 | break; | |
370 | } | |
371 | btrfs_release_path(path); | |
372 | ||
373 | /* | |
374 | * pass 2: read all qgroup relations | |
375 | */ | |
376 | key.objectid = 0; | |
377 | key.type = BTRFS_QGROUP_RELATION_KEY; | |
378 | key.offset = 0; | |
379 | ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 0); | |
380 | if (ret) | |
381 | goto out; | |
382 | while (1) { | |
383 | slot = path->slots[0]; | |
384 | l = path->nodes[0]; | |
385 | btrfs_item_key_to_cpu(l, &found_key, slot); | |
386 | ||
387 | if (found_key.type != BTRFS_QGROUP_RELATION_KEY) | |
388 | goto next2; | |
389 | ||
390 | if (found_key.objectid > found_key.offset) { | |
391 | /* parent <- member, not needed to build config */ | |
392 | /* FIXME should we omit the key completely? */ | |
393 | goto next2; | |
394 | } | |
395 | ||
396 | ret = add_relation_rb(fs_info, found_key.objectid, | |
397 | found_key.offset); | |
ff24858c | 398 | if (ret == -ENOENT) { |
efe120a0 FH |
399 | btrfs_warn(fs_info, |
400 | "orphan qgroup relation 0x%llx->0x%llx", | |
c1c9ff7c | 401 | found_key.objectid, found_key.offset); |
ff24858c AJ |
402 | ret = 0; /* ignore the error */ |
403 | } | |
bed92eae AJ |
404 | if (ret) |
405 | goto out; | |
406 | next2: | |
407 | ret = btrfs_next_item(quota_root, path); | |
408 | if (ret < 0) | |
409 | goto out; | |
410 | if (ret) | |
411 | break; | |
412 | } | |
413 | out: | |
414 | fs_info->qgroup_flags |= flags; | |
415 | if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) { | |
416 | fs_info->quota_enabled = 0; | |
417 | fs_info->pending_quota_state = 0; | |
b382a324 JS |
418 | } else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN && |
419 | ret >= 0) { | |
420 | ret = qgroup_rescan_init(fs_info, rescan_progress, 0); | |
bed92eae AJ |
421 | } |
422 | btrfs_free_path(path); | |
423 | ||
eb1716af | 424 | if (ret < 0) { |
1e8f9158 | 425 | ulist_free(fs_info->qgroup_ulist); |
eb1716af | 426 | fs_info->qgroup_ulist = NULL; |
b382a324 | 427 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
eb1716af | 428 | } |
1e8f9158 | 429 | |
bed92eae AJ |
430 | return ret < 0 ? ret : 0; |
431 | } | |
432 | ||
433 | /* | |
e685da14 WS |
434 | * This is called from close_ctree() or open_ctree() or btrfs_quota_disable(), |
435 | * first two are in single-threaded paths.And for the third one, we have set | |
436 | * quota_root to be null with qgroup_lock held before, so it is safe to clean | |
437 | * up the in-memory structures without qgroup_lock held. | |
bed92eae AJ |
438 | */ |
439 | void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info) | |
440 | { | |
441 | struct rb_node *n; | |
442 | struct btrfs_qgroup *qgroup; | |
bed92eae AJ |
443 | |
444 | while ((n = rb_first(&fs_info->qgroup_tree))) { | |
445 | qgroup = rb_entry(n, struct btrfs_qgroup, node); | |
446 | rb_erase(n, &fs_info->qgroup_tree); | |
4082bd3d | 447 | __del_qgroup_rb(qgroup); |
bed92eae | 448 | } |
1e7bac1e WS |
449 | /* |
450 | * we call btrfs_free_qgroup_config() when umounting | |
451 | * filesystem and disabling quota, so we set qgroup_ulit | |
452 | * to be null here to avoid double free. | |
453 | */ | |
1e8f9158 | 454 | ulist_free(fs_info->qgroup_ulist); |
1e7bac1e | 455 | fs_info->qgroup_ulist = NULL; |
bed92eae AJ |
456 | } |
457 | ||
458 | static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, | |
459 | struct btrfs_root *quota_root, | |
460 | u64 src, u64 dst) | |
461 | { | |
462 | int ret; | |
463 | struct btrfs_path *path; | |
464 | struct btrfs_key key; | |
465 | ||
466 | path = btrfs_alloc_path(); | |
467 | if (!path) | |
468 | return -ENOMEM; | |
469 | ||
470 | key.objectid = src; | |
471 | key.type = BTRFS_QGROUP_RELATION_KEY; | |
472 | key.offset = dst; | |
473 | ||
474 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, 0); | |
475 | ||
476 | btrfs_mark_buffer_dirty(path->nodes[0]); | |
477 | ||
478 | btrfs_free_path(path); | |
479 | return ret; | |
480 | } | |
481 | ||
482 | static int del_qgroup_relation_item(struct btrfs_trans_handle *trans, | |
483 | struct btrfs_root *quota_root, | |
484 | u64 src, u64 dst) | |
485 | { | |
486 | int ret; | |
487 | struct btrfs_path *path; | |
488 | struct btrfs_key key; | |
489 | ||
490 | path = btrfs_alloc_path(); | |
491 | if (!path) | |
492 | return -ENOMEM; | |
493 | ||
494 | key.objectid = src; | |
495 | key.type = BTRFS_QGROUP_RELATION_KEY; | |
496 | key.offset = dst; | |
497 | ||
498 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); | |
499 | if (ret < 0) | |
500 | goto out; | |
501 | ||
502 | if (ret > 0) { | |
503 | ret = -ENOENT; | |
504 | goto out; | |
505 | } | |
506 | ||
507 | ret = btrfs_del_item(trans, quota_root, path); | |
508 | out: | |
509 | btrfs_free_path(path); | |
510 | return ret; | |
511 | } | |
512 | ||
513 | static int add_qgroup_item(struct btrfs_trans_handle *trans, | |
514 | struct btrfs_root *quota_root, u64 qgroupid) | |
515 | { | |
516 | int ret; | |
517 | struct btrfs_path *path; | |
518 | struct btrfs_qgroup_info_item *qgroup_info; | |
519 | struct btrfs_qgroup_limit_item *qgroup_limit; | |
520 | struct extent_buffer *leaf; | |
521 | struct btrfs_key key; | |
522 | ||
523 | path = btrfs_alloc_path(); | |
524 | if (!path) | |
525 | return -ENOMEM; | |
526 | ||
527 | key.objectid = 0; | |
528 | key.type = BTRFS_QGROUP_INFO_KEY; | |
529 | key.offset = qgroupid; | |
530 | ||
531 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, | |
532 | sizeof(*qgroup_info)); | |
533 | if (ret) | |
534 | goto out; | |
535 | ||
536 | leaf = path->nodes[0]; | |
537 | qgroup_info = btrfs_item_ptr(leaf, path->slots[0], | |
538 | struct btrfs_qgroup_info_item); | |
539 | btrfs_set_qgroup_info_generation(leaf, qgroup_info, trans->transid); | |
540 | btrfs_set_qgroup_info_rfer(leaf, qgroup_info, 0); | |
541 | btrfs_set_qgroup_info_rfer_cmpr(leaf, qgroup_info, 0); | |
542 | btrfs_set_qgroup_info_excl(leaf, qgroup_info, 0); | |
543 | btrfs_set_qgroup_info_excl_cmpr(leaf, qgroup_info, 0); | |
544 | ||
545 | btrfs_mark_buffer_dirty(leaf); | |
546 | ||
547 | btrfs_release_path(path); | |
548 | ||
549 | key.type = BTRFS_QGROUP_LIMIT_KEY; | |
550 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, | |
551 | sizeof(*qgroup_limit)); | |
552 | if (ret) | |
553 | goto out; | |
554 | ||
555 | leaf = path->nodes[0]; | |
556 | qgroup_limit = btrfs_item_ptr(leaf, path->slots[0], | |
557 | struct btrfs_qgroup_limit_item); | |
558 | btrfs_set_qgroup_limit_flags(leaf, qgroup_limit, 0); | |
559 | btrfs_set_qgroup_limit_max_rfer(leaf, qgroup_limit, 0); | |
560 | btrfs_set_qgroup_limit_max_excl(leaf, qgroup_limit, 0); | |
561 | btrfs_set_qgroup_limit_rsv_rfer(leaf, qgroup_limit, 0); | |
562 | btrfs_set_qgroup_limit_rsv_excl(leaf, qgroup_limit, 0); | |
563 | ||
564 | btrfs_mark_buffer_dirty(leaf); | |
565 | ||
566 | ret = 0; | |
567 | out: | |
568 | btrfs_free_path(path); | |
569 | return ret; | |
570 | } | |
571 | ||
572 | static int del_qgroup_item(struct btrfs_trans_handle *trans, | |
573 | struct btrfs_root *quota_root, u64 qgroupid) | |
574 | { | |
575 | int ret; | |
576 | struct btrfs_path *path; | |
577 | struct btrfs_key key; | |
578 | ||
579 | path = btrfs_alloc_path(); | |
580 | if (!path) | |
581 | return -ENOMEM; | |
582 | ||
583 | key.objectid = 0; | |
584 | key.type = BTRFS_QGROUP_INFO_KEY; | |
585 | key.offset = qgroupid; | |
586 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); | |
587 | if (ret < 0) | |
588 | goto out; | |
589 | ||
590 | if (ret > 0) { | |
591 | ret = -ENOENT; | |
592 | goto out; | |
593 | } | |
594 | ||
595 | ret = btrfs_del_item(trans, quota_root, path); | |
596 | if (ret) | |
597 | goto out; | |
598 | ||
599 | btrfs_release_path(path); | |
600 | ||
601 | key.type = BTRFS_QGROUP_LIMIT_KEY; | |
602 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); | |
603 | if (ret < 0) | |
604 | goto out; | |
605 | ||
606 | if (ret > 0) { | |
607 | ret = -ENOENT; | |
608 | goto out; | |
609 | } | |
610 | ||
611 | ret = btrfs_del_item(trans, quota_root, path); | |
612 | ||
613 | out: | |
614 | btrfs_free_path(path); | |
615 | return ret; | |
616 | } | |
617 | ||
618 | static int update_qgroup_limit_item(struct btrfs_trans_handle *trans, | |
619 | struct btrfs_root *root, u64 qgroupid, | |
620 | u64 flags, u64 max_rfer, u64 max_excl, | |
621 | u64 rsv_rfer, u64 rsv_excl) | |
622 | { | |
623 | struct btrfs_path *path; | |
624 | struct btrfs_key key; | |
625 | struct extent_buffer *l; | |
626 | struct btrfs_qgroup_limit_item *qgroup_limit; | |
627 | int ret; | |
628 | int slot; | |
629 | ||
630 | key.objectid = 0; | |
631 | key.type = BTRFS_QGROUP_LIMIT_KEY; | |
632 | key.offset = qgroupid; | |
633 | ||
634 | path = btrfs_alloc_path(); | |
84cbe2f7 WS |
635 | if (!path) |
636 | return -ENOMEM; | |
637 | ||
bed92eae AJ |
638 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
639 | if (ret > 0) | |
640 | ret = -ENOENT; | |
641 | ||
642 | if (ret) | |
643 | goto out; | |
644 | ||
645 | l = path->nodes[0]; | |
646 | slot = path->slots[0]; | |
a3df41ee | 647 | qgroup_limit = btrfs_item_ptr(l, slot, struct btrfs_qgroup_limit_item); |
bed92eae AJ |
648 | btrfs_set_qgroup_limit_flags(l, qgroup_limit, flags); |
649 | btrfs_set_qgroup_limit_max_rfer(l, qgroup_limit, max_rfer); | |
650 | btrfs_set_qgroup_limit_max_excl(l, qgroup_limit, max_excl); | |
651 | btrfs_set_qgroup_limit_rsv_rfer(l, qgroup_limit, rsv_rfer); | |
652 | btrfs_set_qgroup_limit_rsv_excl(l, qgroup_limit, rsv_excl); | |
653 | ||
654 | btrfs_mark_buffer_dirty(l); | |
655 | ||
656 | out: | |
657 | btrfs_free_path(path); | |
658 | return ret; | |
659 | } | |
660 | ||
661 | static int update_qgroup_info_item(struct btrfs_trans_handle *trans, | |
662 | struct btrfs_root *root, | |
663 | struct btrfs_qgroup *qgroup) | |
664 | { | |
665 | struct btrfs_path *path; | |
666 | struct btrfs_key key; | |
667 | struct extent_buffer *l; | |
668 | struct btrfs_qgroup_info_item *qgroup_info; | |
669 | int ret; | |
670 | int slot; | |
671 | ||
672 | key.objectid = 0; | |
673 | key.type = BTRFS_QGROUP_INFO_KEY; | |
674 | key.offset = qgroup->qgroupid; | |
675 | ||
676 | path = btrfs_alloc_path(); | |
84cbe2f7 WS |
677 | if (!path) |
678 | return -ENOMEM; | |
679 | ||
bed92eae AJ |
680 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
681 | if (ret > 0) | |
682 | ret = -ENOENT; | |
683 | ||
684 | if (ret) | |
685 | goto out; | |
686 | ||
687 | l = path->nodes[0]; | |
688 | slot = path->slots[0]; | |
a3df41ee | 689 | qgroup_info = btrfs_item_ptr(l, slot, struct btrfs_qgroup_info_item); |
bed92eae AJ |
690 | btrfs_set_qgroup_info_generation(l, qgroup_info, trans->transid); |
691 | btrfs_set_qgroup_info_rfer(l, qgroup_info, qgroup->rfer); | |
692 | btrfs_set_qgroup_info_rfer_cmpr(l, qgroup_info, qgroup->rfer_cmpr); | |
693 | btrfs_set_qgroup_info_excl(l, qgroup_info, qgroup->excl); | |
694 | btrfs_set_qgroup_info_excl_cmpr(l, qgroup_info, qgroup->excl_cmpr); | |
695 | ||
696 | btrfs_mark_buffer_dirty(l); | |
697 | ||
698 | out: | |
699 | btrfs_free_path(path); | |
700 | return ret; | |
701 | } | |
702 | ||
703 | static int update_qgroup_status_item(struct btrfs_trans_handle *trans, | |
704 | struct btrfs_fs_info *fs_info, | |
705 | struct btrfs_root *root) | |
706 | { | |
707 | struct btrfs_path *path; | |
708 | struct btrfs_key key; | |
709 | struct extent_buffer *l; | |
710 | struct btrfs_qgroup_status_item *ptr; | |
711 | int ret; | |
712 | int slot; | |
713 | ||
714 | key.objectid = 0; | |
715 | key.type = BTRFS_QGROUP_STATUS_KEY; | |
716 | key.offset = 0; | |
717 | ||
718 | path = btrfs_alloc_path(); | |
84cbe2f7 WS |
719 | if (!path) |
720 | return -ENOMEM; | |
721 | ||
bed92eae AJ |
722 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
723 | if (ret > 0) | |
724 | ret = -ENOENT; | |
725 | ||
726 | if (ret) | |
727 | goto out; | |
728 | ||
729 | l = path->nodes[0]; | |
730 | slot = path->slots[0]; | |
731 | ptr = btrfs_item_ptr(l, slot, struct btrfs_qgroup_status_item); | |
732 | btrfs_set_qgroup_status_flags(l, ptr, fs_info->qgroup_flags); | |
733 | btrfs_set_qgroup_status_generation(l, ptr, trans->transid); | |
2f232036 JS |
734 | btrfs_set_qgroup_status_rescan(l, ptr, |
735 | fs_info->qgroup_rescan_progress.objectid); | |
bed92eae AJ |
736 | |
737 | btrfs_mark_buffer_dirty(l); | |
738 | ||
739 | out: | |
740 | btrfs_free_path(path); | |
741 | return ret; | |
742 | } | |
743 | ||
744 | /* | |
745 | * called with qgroup_lock held | |
746 | */ | |
747 | static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans, | |
748 | struct btrfs_root *root) | |
749 | { | |
750 | struct btrfs_path *path; | |
751 | struct btrfs_key key; | |
06b3a860 | 752 | struct extent_buffer *leaf = NULL; |
bed92eae | 753 | int ret; |
06b3a860 | 754 | int nr = 0; |
bed92eae | 755 | |
bed92eae AJ |
756 | path = btrfs_alloc_path(); |
757 | if (!path) | |
758 | return -ENOMEM; | |
759 | ||
06b3a860 WS |
760 | path->leave_spinning = 1; |
761 | ||
762 | key.objectid = 0; | |
763 | key.offset = 0; | |
764 | key.type = 0; | |
bed92eae | 765 | |
06b3a860 | 766 | while (1) { |
bed92eae | 767 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); |
06b3a860 WS |
768 | if (ret < 0) |
769 | goto out; | |
770 | leaf = path->nodes[0]; | |
771 | nr = btrfs_header_nritems(leaf); | |
772 | if (!nr) | |
bed92eae | 773 | break; |
06b3a860 WS |
774 | /* |
775 | * delete the leaf one by one | |
776 | * since the whole tree is going | |
777 | * to be deleted. | |
778 | */ | |
779 | path->slots[0] = 0; | |
780 | ret = btrfs_del_items(trans, root, path, 0, nr); | |
bed92eae AJ |
781 | if (ret) |
782 | goto out; | |
06b3a860 | 783 | |
bed92eae AJ |
784 | btrfs_release_path(path); |
785 | } | |
786 | ret = 0; | |
787 | out: | |
788 | root->fs_info->pending_quota_state = 0; | |
789 | btrfs_free_path(path); | |
790 | return ret; | |
791 | } | |
792 | ||
793 | int btrfs_quota_enable(struct btrfs_trans_handle *trans, | |
794 | struct btrfs_fs_info *fs_info) | |
795 | { | |
796 | struct btrfs_root *quota_root; | |
7708f029 | 797 | struct btrfs_root *tree_root = fs_info->tree_root; |
bed92eae AJ |
798 | struct btrfs_path *path = NULL; |
799 | struct btrfs_qgroup_status_item *ptr; | |
800 | struct extent_buffer *leaf; | |
801 | struct btrfs_key key; | |
7708f029 WS |
802 | struct btrfs_key found_key; |
803 | struct btrfs_qgroup *qgroup = NULL; | |
bed92eae | 804 | int ret = 0; |
7708f029 | 805 | int slot; |
bed92eae | 806 | |
f2f6ed3d | 807 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
bed92eae AJ |
808 | if (fs_info->quota_root) { |
809 | fs_info->pending_quota_state = 1; | |
bed92eae AJ |
810 | goto out; |
811 | } | |
bed92eae | 812 | |
1e8f9158 WS |
813 | fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS); |
814 | if (!fs_info->qgroup_ulist) { | |
815 | ret = -ENOMEM; | |
816 | goto out; | |
817 | } | |
818 | ||
bed92eae AJ |
819 | /* |
820 | * initially create the quota tree | |
821 | */ | |
822 | quota_root = btrfs_create_tree(trans, fs_info, | |
823 | BTRFS_QUOTA_TREE_OBJECTID); | |
824 | if (IS_ERR(quota_root)) { | |
825 | ret = PTR_ERR(quota_root); | |
826 | goto out; | |
827 | } | |
828 | ||
829 | path = btrfs_alloc_path(); | |
5b7ff5b3 TI |
830 | if (!path) { |
831 | ret = -ENOMEM; | |
832 | goto out_free_root; | |
833 | } | |
bed92eae AJ |
834 | |
835 | key.objectid = 0; | |
836 | key.type = BTRFS_QGROUP_STATUS_KEY; | |
837 | key.offset = 0; | |
838 | ||
839 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, | |
840 | sizeof(*ptr)); | |
841 | if (ret) | |
5b7ff5b3 | 842 | goto out_free_path; |
bed92eae AJ |
843 | |
844 | leaf = path->nodes[0]; | |
845 | ptr = btrfs_item_ptr(leaf, path->slots[0], | |
846 | struct btrfs_qgroup_status_item); | |
847 | btrfs_set_qgroup_status_generation(leaf, ptr, trans->transid); | |
848 | btrfs_set_qgroup_status_version(leaf, ptr, BTRFS_QGROUP_STATUS_VERSION); | |
849 | fs_info->qgroup_flags = BTRFS_QGROUP_STATUS_FLAG_ON | | |
850 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
851 | btrfs_set_qgroup_status_flags(leaf, ptr, fs_info->qgroup_flags); | |
2f232036 | 852 | btrfs_set_qgroup_status_rescan(leaf, ptr, 0); |
bed92eae AJ |
853 | |
854 | btrfs_mark_buffer_dirty(leaf); | |
855 | ||
7708f029 WS |
856 | key.objectid = 0; |
857 | key.type = BTRFS_ROOT_REF_KEY; | |
858 | key.offset = 0; | |
859 | ||
860 | btrfs_release_path(path); | |
861 | ret = btrfs_search_slot_for_read(tree_root, &key, path, 1, 0); | |
862 | if (ret > 0) | |
863 | goto out_add_root; | |
864 | if (ret < 0) | |
865 | goto out_free_path; | |
866 | ||
867 | ||
868 | while (1) { | |
869 | slot = path->slots[0]; | |
870 | leaf = path->nodes[0]; | |
871 | btrfs_item_key_to_cpu(leaf, &found_key, slot); | |
872 | ||
873 | if (found_key.type == BTRFS_ROOT_REF_KEY) { | |
874 | ret = add_qgroup_item(trans, quota_root, | |
875 | found_key.offset); | |
876 | if (ret) | |
877 | goto out_free_path; | |
878 | ||
7708f029 WS |
879 | qgroup = add_qgroup_rb(fs_info, found_key.offset); |
880 | if (IS_ERR(qgroup)) { | |
7708f029 WS |
881 | ret = PTR_ERR(qgroup); |
882 | goto out_free_path; | |
883 | } | |
7708f029 WS |
884 | } |
885 | ret = btrfs_next_item(tree_root, path); | |
886 | if (ret < 0) | |
887 | goto out_free_path; | |
888 | if (ret) | |
889 | break; | |
890 | } | |
891 | ||
892 | out_add_root: | |
893 | btrfs_release_path(path); | |
894 | ret = add_qgroup_item(trans, quota_root, BTRFS_FS_TREE_OBJECTID); | |
895 | if (ret) | |
896 | goto out_free_path; | |
897 | ||
7708f029 WS |
898 | qgroup = add_qgroup_rb(fs_info, BTRFS_FS_TREE_OBJECTID); |
899 | if (IS_ERR(qgroup)) { | |
7708f029 WS |
900 | ret = PTR_ERR(qgroup); |
901 | goto out_free_path; | |
902 | } | |
58400fce | 903 | spin_lock(&fs_info->qgroup_lock); |
bed92eae AJ |
904 | fs_info->quota_root = quota_root; |
905 | fs_info->pending_quota_state = 1; | |
906 | spin_unlock(&fs_info->qgroup_lock); | |
5b7ff5b3 | 907 | out_free_path: |
bed92eae | 908 | btrfs_free_path(path); |
5b7ff5b3 TI |
909 | out_free_root: |
910 | if (ret) { | |
911 | free_extent_buffer(quota_root->node); | |
912 | free_extent_buffer(quota_root->commit_root); | |
913 | kfree(quota_root); | |
914 | } | |
915 | out: | |
eb1716af | 916 | if (ret) { |
1e8f9158 | 917 | ulist_free(fs_info->qgroup_ulist); |
eb1716af JS |
918 | fs_info->qgroup_ulist = NULL; |
919 | } | |
f2f6ed3d | 920 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
bed92eae AJ |
921 | return ret; |
922 | } | |
923 | ||
924 | int btrfs_quota_disable(struct btrfs_trans_handle *trans, | |
925 | struct btrfs_fs_info *fs_info) | |
926 | { | |
927 | struct btrfs_root *tree_root = fs_info->tree_root; | |
928 | struct btrfs_root *quota_root; | |
929 | int ret = 0; | |
930 | ||
f2f6ed3d | 931 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
58400fce | 932 | if (!fs_info->quota_root) |
f2f6ed3d | 933 | goto out; |
58400fce | 934 | spin_lock(&fs_info->qgroup_lock); |
bed92eae AJ |
935 | fs_info->quota_enabled = 0; |
936 | fs_info->pending_quota_state = 0; | |
937 | quota_root = fs_info->quota_root; | |
938 | fs_info->quota_root = NULL; | |
bed92eae AJ |
939 | spin_unlock(&fs_info->qgroup_lock); |
940 | ||
e685da14 WS |
941 | btrfs_free_qgroup_config(fs_info); |
942 | ||
bed92eae AJ |
943 | ret = btrfs_clean_quota_tree(trans, quota_root); |
944 | if (ret) | |
945 | goto out; | |
946 | ||
947 | ret = btrfs_del_root(trans, tree_root, "a_root->root_key); | |
948 | if (ret) | |
949 | goto out; | |
950 | ||
951 | list_del("a_root->dirty_list); | |
952 | ||
953 | btrfs_tree_lock(quota_root->node); | |
954 | clean_tree_block(trans, tree_root, quota_root->node); | |
955 | btrfs_tree_unlock(quota_root->node); | |
956 | btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1); | |
957 | ||
958 | free_extent_buffer(quota_root->node); | |
959 | free_extent_buffer(quota_root->commit_root); | |
960 | kfree(quota_root); | |
961 | out: | |
f2f6ed3d | 962 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
bed92eae AJ |
963 | return ret; |
964 | } | |
965 | ||
2f232036 JS |
966 | static void qgroup_dirty(struct btrfs_fs_info *fs_info, |
967 | struct btrfs_qgroup *qgroup) | |
bed92eae | 968 | { |
2f232036 JS |
969 | if (list_empty(&qgroup->dirty)) |
970 | list_add(&qgroup->dirty, &fs_info->dirty_qgroups); | |
bed92eae AJ |
971 | } |
972 | ||
973 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, | |
974 | struct btrfs_fs_info *fs_info, u64 src, u64 dst) | |
975 | { | |
976 | struct btrfs_root *quota_root; | |
b7fef4f5 WS |
977 | struct btrfs_qgroup *parent; |
978 | struct btrfs_qgroup *member; | |
534e6623 | 979 | struct btrfs_qgroup_list *list; |
bed92eae AJ |
980 | int ret = 0; |
981 | ||
f2f6ed3d | 982 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
bed92eae | 983 | quota_root = fs_info->quota_root; |
f2f6ed3d WS |
984 | if (!quota_root) { |
985 | ret = -EINVAL; | |
986 | goto out; | |
987 | } | |
b7fef4f5 WS |
988 | member = find_qgroup_rb(fs_info, src); |
989 | parent = find_qgroup_rb(fs_info, dst); | |
990 | if (!member || !parent) { | |
991 | ret = -EINVAL; | |
992 | goto out; | |
993 | } | |
bed92eae | 994 | |
534e6623 WS |
995 | /* check if such qgroup relation exist firstly */ |
996 | list_for_each_entry(list, &member->groups, next_group) { | |
997 | if (list->group == parent) { | |
998 | ret = -EEXIST; | |
999 | goto out; | |
1000 | } | |
1001 | } | |
1002 | ||
bed92eae AJ |
1003 | ret = add_qgroup_relation_item(trans, quota_root, src, dst); |
1004 | if (ret) | |
f2f6ed3d | 1005 | goto out; |
bed92eae AJ |
1006 | |
1007 | ret = add_qgroup_relation_item(trans, quota_root, dst, src); | |
1008 | if (ret) { | |
1009 | del_qgroup_relation_item(trans, quota_root, src, dst); | |
f2f6ed3d | 1010 | goto out; |
bed92eae AJ |
1011 | } |
1012 | ||
1013 | spin_lock(&fs_info->qgroup_lock); | |
1014 | ret = add_relation_rb(quota_root->fs_info, src, dst); | |
1015 | spin_unlock(&fs_info->qgroup_lock); | |
f2f6ed3d WS |
1016 | out: |
1017 | mutex_unlock(&fs_info->qgroup_ioctl_lock); | |
bed92eae AJ |
1018 | return ret; |
1019 | } | |
1020 | ||
1021 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, | |
1022 | struct btrfs_fs_info *fs_info, u64 src, u64 dst) | |
1023 | { | |
1024 | struct btrfs_root *quota_root; | |
534e6623 WS |
1025 | struct btrfs_qgroup *parent; |
1026 | struct btrfs_qgroup *member; | |
1027 | struct btrfs_qgroup_list *list; | |
bed92eae AJ |
1028 | int ret = 0; |
1029 | int err; | |
1030 | ||
f2f6ed3d | 1031 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
bed92eae | 1032 | quota_root = fs_info->quota_root; |
f2f6ed3d WS |
1033 | if (!quota_root) { |
1034 | ret = -EINVAL; | |
1035 | goto out; | |
1036 | } | |
bed92eae | 1037 | |
534e6623 WS |
1038 | member = find_qgroup_rb(fs_info, src); |
1039 | parent = find_qgroup_rb(fs_info, dst); | |
1040 | if (!member || !parent) { | |
1041 | ret = -EINVAL; | |
1042 | goto out; | |
1043 | } | |
1044 | ||
1045 | /* check if such qgroup relation exist firstly */ | |
1046 | list_for_each_entry(list, &member->groups, next_group) { | |
1047 | if (list->group == parent) | |
1048 | goto exist; | |
1049 | } | |
1050 | ret = -ENOENT; | |
1051 | goto out; | |
1052 | exist: | |
bed92eae AJ |
1053 | ret = del_qgroup_relation_item(trans, quota_root, src, dst); |
1054 | err = del_qgroup_relation_item(trans, quota_root, dst, src); | |
1055 | if (err && !ret) | |
1056 | ret = err; | |
1057 | ||
1058 | spin_lock(&fs_info->qgroup_lock); | |
1059 | del_relation_rb(fs_info, src, dst); | |
bed92eae | 1060 | spin_unlock(&fs_info->qgroup_lock); |
f2f6ed3d WS |
1061 | out: |
1062 | mutex_unlock(&fs_info->qgroup_ioctl_lock); | |
bed92eae AJ |
1063 | return ret; |
1064 | } | |
1065 | ||
1066 | int btrfs_create_qgroup(struct btrfs_trans_handle *trans, | |
1067 | struct btrfs_fs_info *fs_info, u64 qgroupid, char *name) | |
1068 | { | |
1069 | struct btrfs_root *quota_root; | |
1070 | struct btrfs_qgroup *qgroup; | |
1071 | int ret = 0; | |
1072 | ||
f2f6ed3d | 1073 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
bed92eae | 1074 | quota_root = fs_info->quota_root; |
f2f6ed3d WS |
1075 | if (!quota_root) { |
1076 | ret = -EINVAL; | |
1077 | goto out; | |
1078 | } | |
534e6623 WS |
1079 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
1080 | if (qgroup) { | |
1081 | ret = -EEXIST; | |
1082 | goto out; | |
1083 | } | |
bed92eae AJ |
1084 | |
1085 | ret = add_qgroup_item(trans, quota_root, qgroupid); | |
534e6623 WS |
1086 | if (ret) |
1087 | goto out; | |
bed92eae AJ |
1088 | |
1089 | spin_lock(&fs_info->qgroup_lock); | |
1090 | qgroup = add_qgroup_rb(fs_info, qgroupid); | |
1091 | spin_unlock(&fs_info->qgroup_lock); | |
1092 | ||
1093 | if (IS_ERR(qgroup)) | |
1094 | ret = PTR_ERR(qgroup); | |
f2f6ed3d WS |
1095 | out: |
1096 | mutex_unlock(&fs_info->qgroup_ioctl_lock); | |
bed92eae AJ |
1097 | return ret; |
1098 | } | |
1099 | ||
1100 | int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, | |
1101 | struct btrfs_fs_info *fs_info, u64 qgroupid) | |
1102 | { | |
1103 | struct btrfs_root *quota_root; | |
2cf68703 | 1104 | struct btrfs_qgroup *qgroup; |
bed92eae AJ |
1105 | int ret = 0; |
1106 | ||
f2f6ed3d | 1107 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
bed92eae | 1108 | quota_root = fs_info->quota_root; |
f2f6ed3d WS |
1109 | if (!quota_root) { |
1110 | ret = -EINVAL; | |
1111 | goto out; | |
1112 | } | |
bed92eae | 1113 | |
2cf68703 | 1114 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
534e6623 WS |
1115 | if (!qgroup) { |
1116 | ret = -ENOENT; | |
1117 | goto out; | |
1118 | } else { | |
1119 | /* check if there are no relations to this qgroup */ | |
1120 | if (!list_empty(&qgroup->groups) || | |
1121 | !list_empty(&qgroup->members)) { | |
f2f6ed3d WS |
1122 | ret = -EBUSY; |
1123 | goto out; | |
2cf68703 AJ |
1124 | } |
1125 | } | |
bed92eae AJ |
1126 | ret = del_qgroup_item(trans, quota_root, qgroupid); |
1127 | ||
1128 | spin_lock(&fs_info->qgroup_lock); | |
1129 | del_qgroup_rb(quota_root->fs_info, qgroupid); | |
bed92eae | 1130 | spin_unlock(&fs_info->qgroup_lock); |
f2f6ed3d WS |
1131 | out: |
1132 | mutex_unlock(&fs_info->qgroup_ioctl_lock); | |
bed92eae AJ |
1133 | return ret; |
1134 | } | |
1135 | ||
1136 | int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, | |
1137 | struct btrfs_fs_info *fs_info, u64 qgroupid, | |
1138 | struct btrfs_qgroup_limit *limit) | |
1139 | { | |
f2f6ed3d | 1140 | struct btrfs_root *quota_root; |
bed92eae AJ |
1141 | struct btrfs_qgroup *qgroup; |
1142 | int ret = 0; | |
1143 | ||
f2f6ed3d WS |
1144 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
1145 | quota_root = fs_info->quota_root; | |
1146 | if (!quota_root) { | |
1147 | ret = -EINVAL; | |
1148 | goto out; | |
1149 | } | |
bed92eae | 1150 | |
ddb47afa WS |
1151 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
1152 | if (!qgroup) { | |
1153 | ret = -ENOENT; | |
1154 | goto out; | |
1155 | } | |
bed92eae AJ |
1156 | ret = update_qgroup_limit_item(trans, quota_root, qgroupid, |
1157 | limit->flags, limit->max_rfer, | |
1158 | limit->max_excl, limit->rsv_rfer, | |
1159 | limit->rsv_excl); | |
1160 | if (ret) { | |
1161 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
efe120a0 | 1162 | btrfs_info(fs_info, "unable to update quota limit for %llu", |
c1c9ff7c | 1163 | qgroupid); |
bed92eae AJ |
1164 | } |
1165 | ||
58400fce | 1166 | spin_lock(&fs_info->qgroup_lock); |
bed92eae AJ |
1167 | qgroup->lim_flags = limit->flags; |
1168 | qgroup->max_rfer = limit->max_rfer; | |
1169 | qgroup->max_excl = limit->max_excl; | |
1170 | qgroup->rsv_rfer = limit->rsv_rfer; | |
1171 | qgroup->rsv_excl = limit->rsv_excl; | |
bed92eae | 1172 | spin_unlock(&fs_info->qgroup_lock); |
f2f6ed3d WS |
1173 | out: |
1174 | mutex_unlock(&fs_info->qgroup_ioctl_lock); | |
bed92eae AJ |
1175 | return ret; |
1176 | } | |
1177 | ||
bed92eae AJ |
1178 | /* |
1179 | * btrfs_qgroup_record_ref is called when the ref is added or deleted. it puts | |
1180 | * the modification into a list that's later used by btrfs_end_transaction to | |
1181 | * pass the recorded modifications on to btrfs_qgroup_account_ref. | |
1182 | */ | |
1183 | int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, | |
1184 | struct btrfs_delayed_ref_node *node, | |
1185 | struct btrfs_delayed_extent_op *extent_op) | |
1186 | { | |
1187 | struct qgroup_update *u; | |
1188 | ||
1189 | BUG_ON(!trans->delayed_ref_elem.seq); | |
1190 | u = kmalloc(sizeof(*u), GFP_NOFS); | |
1191 | if (!u) | |
1192 | return -ENOMEM; | |
1193 | ||
1194 | u->node = node; | |
1195 | u->extent_op = extent_op; | |
1196 | list_add_tail(&u->list, &trans->qgroup_ref_list); | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
46b665ce JS |
1201 | static int qgroup_account_ref_step1(struct btrfs_fs_info *fs_info, |
1202 | struct ulist *roots, struct ulist *tmp, | |
1203 | u64 seq) | |
1204 | { | |
1205 | struct ulist_node *unode; | |
1206 | struct ulist_iterator uiter; | |
1207 | struct ulist_node *tmp_unode; | |
1208 | struct ulist_iterator tmp_uiter; | |
1209 | struct btrfs_qgroup *qg; | |
1210 | int ret; | |
1211 | ||
1212 | ULIST_ITER_INIT(&uiter); | |
1213 | while ((unode = ulist_next(roots, &uiter))) { | |
1214 | qg = find_qgroup_rb(fs_info, unode->val); | |
1215 | if (!qg) | |
1216 | continue; | |
1217 | ||
1218 | ulist_reinit(tmp); | |
1219 | /* XXX id not needed */ | |
1220 | ret = ulist_add(tmp, qg->qgroupid, | |
1221 | (u64)(uintptr_t)qg, GFP_ATOMIC); | |
1222 | if (ret < 0) | |
1223 | return ret; | |
1224 | ULIST_ITER_INIT(&tmp_uiter); | |
1225 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { | |
1226 | struct btrfs_qgroup_list *glist; | |
1227 | ||
1228 | qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; | |
1229 | if (qg->refcnt < seq) | |
1230 | qg->refcnt = seq + 1; | |
1231 | else | |
1232 | ++qg->refcnt; | |
1233 | ||
1234 | list_for_each_entry(glist, &qg->groups, next_group) { | |
1235 | ret = ulist_add(tmp, glist->group->qgroupid, | |
1236 | (u64)(uintptr_t)glist->group, | |
1237 | GFP_ATOMIC); | |
1238 | if (ret < 0) | |
1239 | return ret; | |
1240 | } | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int qgroup_account_ref_step2(struct btrfs_fs_info *fs_info, | |
1248 | struct ulist *roots, struct ulist *tmp, | |
1249 | u64 seq, int sgn, u64 num_bytes, | |
1250 | struct btrfs_qgroup *qgroup) | |
1251 | { | |
1252 | struct ulist_node *unode; | |
1253 | struct ulist_iterator uiter; | |
1254 | struct btrfs_qgroup *qg; | |
1255 | struct btrfs_qgroup_list *glist; | |
1256 | int ret; | |
1257 | ||
1258 | ulist_reinit(tmp); | |
1259 | ret = ulist_add(tmp, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC); | |
1260 | if (ret < 0) | |
1261 | return ret; | |
1262 | ||
1263 | ULIST_ITER_INIT(&uiter); | |
1264 | while ((unode = ulist_next(tmp, &uiter))) { | |
1265 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; | |
1266 | if (qg->refcnt < seq) { | |
1267 | /* not visited by step 1 */ | |
1268 | qg->rfer += sgn * num_bytes; | |
1269 | qg->rfer_cmpr += sgn * num_bytes; | |
1270 | if (roots->nnodes == 0) { | |
1271 | qg->excl += sgn * num_bytes; | |
1272 | qg->excl_cmpr += sgn * num_bytes; | |
1273 | } | |
1274 | qgroup_dirty(fs_info, qg); | |
1275 | } | |
1276 | WARN_ON(qg->tag >= seq); | |
1277 | qg->tag = seq; | |
1278 | ||
1279 | list_for_each_entry(glist, &qg->groups, next_group) { | |
1280 | ret = ulist_add(tmp, glist->group->qgroupid, | |
1281 | (uintptr_t)glist->group, GFP_ATOMIC); | |
1282 | if (ret < 0) | |
1283 | return ret; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | static int qgroup_account_ref_step3(struct btrfs_fs_info *fs_info, | |
1291 | struct ulist *roots, struct ulist *tmp, | |
1292 | u64 seq, int sgn, u64 num_bytes) | |
1293 | { | |
1294 | struct ulist_node *unode; | |
1295 | struct ulist_iterator uiter; | |
1296 | struct btrfs_qgroup *qg; | |
1297 | struct ulist_node *tmp_unode; | |
1298 | struct ulist_iterator tmp_uiter; | |
1299 | int ret; | |
1300 | ||
1301 | ULIST_ITER_INIT(&uiter); | |
1302 | while ((unode = ulist_next(roots, &uiter))) { | |
1303 | qg = find_qgroup_rb(fs_info, unode->val); | |
1304 | if (!qg) | |
1305 | continue; | |
1306 | ||
1307 | ulist_reinit(tmp); | |
1308 | ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, GFP_ATOMIC); | |
1309 | if (ret < 0) | |
1310 | return ret; | |
1311 | ||
1312 | ULIST_ITER_INIT(&tmp_uiter); | |
1313 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { | |
1314 | struct btrfs_qgroup_list *glist; | |
1315 | ||
1316 | qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; | |
1317 | if (qg->tag == seq) | |
1318 | continue; | |
1319 | ||
1320 | if (qg->refcnt - seq == roots->nnodes) { | |
1321 | qg->excl -= sgn * num_bytes; | |
1322 | qg->excl_cmpr -= sgn * num_bytes; | |
1323 | qgroup_dirty(fs_info, qg); | |
1324 | } | |
1325 | ||
1326 | list_for_each_entry(glist, &qg->groups, next_group) { | |
1327 | ret = ulist_add(tmp, glist->group->qgroupid, | |
1328 | (uintptr_t)glist->group, | |
1329 | GFP_ATOMIC); | |
1330 | if (ret < 0) | |
1331 | return ret; | |
1332 | } | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | return 0; | |
1337 | } | |
1338 | ||
bed92eae AJ |
1339 | /* |
1340 | * btrfs_qgroup_account_ref is called for every ref that is added to or deleted | |
1341 | * from the fs. First, all roots referencing the extent are searched, and | |
1342 | * then the space is accounted accordingly to the different roots. The | |
1343 | * accounting algorithm works in 3 steps documented inline. | |
1344 | */ | |
1345 | int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, | |
1346 | struct btrfs_fs_info *fs_info, | |
1347 | struct btrfs_delayed_ref_node *node, | |
1348 | struct btrfs_delayed_extent_op *extent_op) | |
1349 | { | |
bed92eae AJ |
1350 | struct btrfs_root *quota_root; |
1351 | u64 ref_root; | |
1352 | struct btrfs_qgroup *qgroup; | |
bed92eae | 1353 | struct ulist *roots = NULL; |
bed92eae AJ |
1354 | u64 seq; |
1355 | int ret = 0; | |
1356 | int sgn; | |
1357 | ||
1358 | if (!fs_info->quota_enabled) | |
1359 | return 0; | |
1360 | ||
1361 | BUG_ON(!fs_info->quota_root); | |
1362 | ||
bed92eae AJ |
1363 | if (node->type == BTRFS_TREE_BLOCK_REF_KEY || |
1364 | node->type == BTRFS_SHARED_BLOCK_REF_KEY) { | |
1365 | struct btrfs_delayed_tree_ref *ref; | |
1366 | ref = btrfs_delayed_node_to_tree_ref(node); | |
1367 | ref_root = ref->root; | |
1368 | } else if (node->type == BTRFS_EXTENT_DATA_REF_KEY || | |
1369 | node->type == BTRFS_SHARED_DATA_REF_KEY) { | |
1370 | struct btrfs_delayed_data_ref *ref; | |
1371 | ref = btrfs_delayed_node_to_data_ref(node); | |
1372 | ref_root = ref->root; | |
1373 | } else { | |
1374 | BUG(); | |
1375 | } | |
1376 | ||
1377 | if (!is_fstree(ref_root)) { | |
1378 | /* | |
1379 | * non-fs-trees are not being accounted | |
1380 | */ | |
1381 | return 0; | |
1382 | } | |
1383 | ||
1384 | switch (node->action) { | |
1385 | case BTRFS_ADD_DELAYED_REF: | |
1386 | case BTRFS_ADD_DELAYED_EXTENT: | |
1387 | sgn = 1; | |
fc36ed7e | 1388 | seq = btrfs_tree_mod_seq_prev(node->seq); |
bed92eae AJ |
1389 | break; |
1390 | case BTRFS_DROP_DELAYED_REF: | |
1391 | sgn = -1; | |
fc36ed7e | 1392 | seq = node->seq; |
bed92eae AJ |
1393 | break; |
1394 | case BTRFS_UPDATE_DELAYED_HEAD: | |
1395 | return 0; | |
1396 | default: | |
1397 | BUG(); | |
1398 | } | |
1399 | ||
2f232036 JS |
1400 | mutex_lock(&fs_info->qgroup_rescan_lock); |
1401 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { | |
1402 | if (fs_info->qgroup_rescan_progress.objectid <= node->bytenr) { | |
1403 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
1404 | return 0; | |
1405 | } | |
1406 | } | |
1407 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
1408 | ||
bed92eae AJ |
1409 | /* |
1410 | * the delayed ref sequence number we pass depends on the direction of | |
fc36ed7e JS |
1411 | * the operation. for add operations, we pass |
1412 | * tree_mod_log_prev_seq(node->seq) to skip | |
bed92eae AJ |
1413 | * the delayed ref's current sequence number, because we need the state |
1414 | * of the tree before the add operation. for delete operations, we pass | |
1415 | * (node->seq) to include the delayed ref's current sequence number, | |
1416 | * because we need the state of the tree after the delete operation. | |
1417 | */ | |
fc36ed7e | 1418 | ret = btrfs_find_all_roots(trans, fs_info, node->bytenr, seq, &roots); |
bed92eae | 1419 | if (ret < 0) |
a7975026 | 1420 | return ret; |
bed92eae AJ |
1421 | |
1422 | spin_lock(&fs_info->qgroup_lock); | |
2f232036 | 1423 | |
bed92eae AJ |
1424 | quota_root = fs_info->quota_root; |
1425 | if (!quota_root) | |
1426 | goto unlock; | |
1427 | ||
1428 | qgroup = find_qgroup_rb(fs_info, ref_root); | |
1429 | if (!qgroup) | |
1430 | goto unlock; | |
1431 | ||
1432 | /* | |
1433 | * step 1: for each old ref, visit all nodes once and inc refcnt | |
1434 | */ | |
1e8f9158 | 1435 | ulist_reinit(fs_info->qgroup_ulist); |
bed92eae AJ |
1436 | seq = fs_info->qgroup_seq; |
1437 | fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ | |
1438 | ||
1e8f9158 WS |
1439 | ret = qgroup_account_ref_step1(fs_info, roots, fs_info->qgroup_ulist, |
1440 | seq); | |
46b665ce JS |
1441 | if (ret) |
1442 | goto unlock; | |
bed92eae AJ |
1443 | |
1444 | /* | |
1445 | * step 2: walk from the new root | |
1446 | */ | |
1e8f9158 WS |
1447 | ret = qgroup_account_ref_step2(fs_info, roots, fs_info->qgroup_ulist, |
1448 | seq, sgn, node->num_bytes, qgroup); | |
46b665ce | 1449 | if (ret) |
3c97185c | 1450 | goto unlock; |
bed92eae AJ |
1451 | |
1452 | /* | |
1453 | * step 3: walk again from old refs | |
1454 | */ | |
1e8f9158 WS |
1455 | ret = qgroup_account_ref_step3(fs_info, roots, fs_info->qgroup_ulist, |
1456 | seq, sgn, node->num_bytes); | |
46b665ce JS |
1457 | if (ret) |
1458 | goto unlock; | |
bed92eae | 1459 | |
bed92eae AJ |
1460 | unlock: |
1461 | spin_unlock(&fs_info->qgroup_lock); | |
bed92eae | 1462 | ulist_free(roots); |
bed92eae AJ |
1463 | |
1464 | return ret; | |
1465 | } | |
1466 | ||
1467 | /* | |
1468 | * called from commit_transaction. Writes all changed qgroups to disk. | |
1469 | */ | |
1470 | int btrfs_run_qgroups(struct btrfs_trans_handle *trans, | |
1471 | struct btrfs_fs_info *fs_info) | |
1472 | { | |
1473 | struct btrfs_root *quota_root = fs_info->quota_root; | |
1474 | int ret = 0; | |
3d7b5a28 | 1475 | int start_rescan_worker = 0; |
bed92eae AJ |
1476 | |
1477 | if (!quota_root) | |
1478 | goto out; | |
1479 | ||
3d7b5a28 JS |
1480 | if (!fs_info->quota_enabled && fs_info->pending_quota_state) |
1481 | start_rescan_worker = 1; | |
1482 | ||
bed92eae AJ |
1483 | fs_info->quota_enabled = fs_info->pending_quota_state; |
1484 | ||
1485 | spin_lock(&fs_info->qgroup_lock); | |
1486 | while (!list_empty(&fs_info->dirty_qgroups)) { | |
1487 | struct btrfs_qgroup *qgroup; | |
1488 | qgroup = list_first_entry(&fs_info->dirty_qgroups, | |
1489 | struct btrfs_qgroup, dirty); | |
1490 | list_del_init(&qgroup->dirty); | |
1491 | spin_unlock(&fs_info->qgroup_lock); | |
1492 | ret = update_qgroup_info_item(trans, quota_root, qgroup); | |
1493 | if (ret) | |
1494 | fs_info->qgroup_flags |= | |
1495 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
1496 | spin_lock(&fs_info->qgroup_lock); | |
1497 | } | |
1498 | if (fs_info->quota_enabled) | |
1499 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON; | |
1500 | else | |
1501 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON; | |
1502 | spin_unlock(&fs_info->qgroup_lock); | |
1503 | ||
1504 | ret = update_qgroup_status_item(trans, fs_info, quota_root); | |
1505 | if (ret) | |
1506 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
1507 | ||
3d7b5a28 | 1508 | if (!ret && start_rescan_worker) { |
b382a324 JS |
1509 | ret = qgroup_rescan_init(fs_info, 0, 1); |
1510 | if (!ret) { | |
1511 | qgroup_rescan_zero_tracking(fs_info); | |
fc97fab0 QW |
1512 | btrfs_queue_work(fs_info->qgroup_rescan_workers, |
1513 | &fs_info->qgroup_rescan_work); | |
b382a324 | 1514 | } |
3d7b5a28 JS |
1515 | ret = 0; |
1516 | } | |
1517 | ||
bed92eae AJ |
1518 | out: |
1519 | ||
1520 | return ret; | |
1521 | } | |
1522 | ||
1523 | /* | |
1524 | * copy the acounting information between qgroups. This is necessary when a | |
1525 | * snapshot or a subvolume is created | |
1526 | */ | |
1527 | int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, | |
1528 | struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, | |
1529 | struct btrfs_qgroup_inherit *inherit) | |
1530 | { | |
1531 | int ret = 0; | |
1532 | int i; | |
1533 | u64 *i_qgroups; | |
1534 | struct btrfs_root *quota_root = fs_info->quota_root; | |
1535 | struct btrfs_qgroup *srcgroup; | |
1536 | struct btrfs_qgroup *dstgroup; | |
1537 | u32 level_size = 0; | |
3f5e2d3b | 1538 | u64 nums; |
bed92eae | 1539 | |
f2f6ed3d | 1540 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
bed92eae | 1541 | if (!fs_info->quota_enabled) |
f2f6ed3d | 1542 | goto out; |
bed92eae | 1543 | |
f2f6ed3d WS |
1544 | if (!quota_root) { |
1545 | ret = -EINVAL; | |
1546 | goto out; | |
1547 | } | |
bed92eae | 1548 | |
3f5e2d3b WS |
1549 | if (inherit) { |
1550 | i_qgroups = (u64 *)(inherit + 1); | |
1551 | nums = inherit->num_qgroups + 2 * inherit->num_ref_copies + | |
1552 | 2 * inherit->num_excl_copies; | |
1553 | for (i = 0; i < nums; ++i) { | |
1554 | srcgroup = find_qgroup_rb(fs_info, *i_qgroups); | |
1555 | if (!srcgroup) { | |
1556 | ret = -EINVAL; | |
1557 | goto out; | |
1558 | } | |
1559 | ++i_qgroups; | |
1560 | } | |
1561 | } | |
1562 | ||
bed92eae AJ |
1563 | /* |
1564 | * create a tracking group for the subvol itself | |
1565 | */ | |
1566 | ret = add_qgroup_item(trans, quota_root, objectid); | |
1567 | if (ret) | |
1568 | goto out; | |
1569 | ||
1570 | if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) { | |
1571 | ret = update_qgroup_limit_item(trans, quota_root, objectid, | |
1572 | inherit->lim.flags, | |
1573 | inherit->lim.max_rfer, | |
1574 | inherit->lim.max_excl, | |
1575 | inherit->lim.rsv_rfer, | |
1576 | inherit->lim.rsv_excl); | |
1577 | if (ret) | |
1578 | goto out; | |
1579 | } | |
1580 | ||
1581 | if (srcid) { | |
1582 | struct btrfs_root *srcroot; | |
1583 | struct btrfs_key srckey; | |
1584 | int srcroot_level; | |
1585 | ||
1586 | srckey.objectid = srcid; | |
1587 | srckey.type = BTRFS_ROOT_ITEM_KEY; | |
1588 | srckey.offset = (u64)-1; | |
1589 | srcroot = btrfs_read_fs_root_no_name(fs_info, &srckey); | |
1590 | if (IS_ERR(srcroot)) { | |
1591 | ret = PTR_ERR(srcroot); | |
1592 | goto out; | |
1593 | } | |
1594 | ||
1595 | rcu_read_lock(); | |
1596 | srcroot_level = btrfs_header_level(srcroot->node); | |
1597 | level_size = btrfs_level_size(srcroot, srcroot_level); | |
1598 | rcu_read_unlock(); | |
1599 | } | |
1600 | ||
1601 | /* | |
1602 | * add qgroup to all inherited groups | |
1603 | */ | |
1604 | if (inherit) { | |
1605 | i_qgroups = (u64 *)(inherit + 1); | |
1606 | for (i = 0; i < inherit->num_qgroups; ++i) { | |
1607 | ret = add_qgroup_relation_item(trans, quota_root, | |
1608 | objectid, *i_qgroups); | |
1609 | if (ret) | |
1610 | goto out; | |
1611 | ret = add_qgroup_relation_item(trans, quota_root, | |
1612 | *i_qgroups, objectid); | |
1613 | if (ret) | |
1614 | goto out; | |
1615 | ++i_qgroups; | |
1616 | } | |
1617 | } | |
1618 | ||
1619 | ||
1620 | spin_lock(&fs_info->qgroup_lock); | |
1621 | ||
1622 | dstgroup = add_qgroup_rb(fs_info, objectid); | |
57a5a882 DC |
1623 | if (IS_ERR(dstgroup)) { |
1624 | ret = PTR_ERR(dstgroup); | |
bed92eae | 1625 | goto unlock; |
57a5a882 | 1626 | } |
bed92eae AJ |
1627 | |
1628 | if (srcid) { | |
1629 | srcgroup = find_qgroup_rb(fs_info, srcid); | |
f3a87f1b | 1630 | if (!srcgroup) |
bed92eae AJ |
1631 | goto unlock; |
1632 | dstgroup->rfer = srcgroup->rfer - level_size; | |
1633 | dstgroup->rfer_cmpr = srcgroup->rfer_cmpr - level_size; | |
1634 | srcgroup->excl = level_size; | |
1635 | srcgroup->excl_cmpr = level_size; | |
1636 | qgroup_dirty(fs_info, dstgroup); | |
1637 | qgroup_dirty(fs_info, srcgroup); | |
1638 | } | |
1639 | ||
f3a87f1b | 1640 | if (!inherit) |
bed92eae AJ |
1641 | goto unlock; |
1642 | ||
1643 | i_qgroups = (u64 *)(inherit + 1); | |
1644 | for (i = 0; i < inherit->num_qgroups; ++i) { | |
1645 | ret = add_relation_rb(quota_root->fs_info, objectid, | |
1646 | *i_qgroups); | |
1647 | if (ret) | |
1648 | goto unlock; | |
1649 | ++i_qgroups; | |
1650 | } | |
1651 | ||
1652 | for (i = 0; i < inherit->num_ref_copies; ++i) { | |
1653 | struct btrfs_qgroup *src; | |
1654 | struct btrfs_qgroup *dst; | |
1655 | ||
1656 | src = find_qgroup_rb(fs_info, i_qgroups[0]); | |
1657 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); | |
1658 | ||
1659 | if (!src || !dst) { | |
1660 | ret = -EINVAL; | |
1661 | goto unlock; | |
1662 | } | |
1663 | ||
1664 | dst->rfer = src->rfer - level_size; | |
1665 | dst->rfer_cmpr = src->rfer_cmpr - level_size; | |
1666 | i_qgroups += 2; | |
1667 | } | |
1668 | for (i = 0; i < inherit->num_excl_copies; ++i) { | |
1669 | struct btrfs_qgroup *src; | |
1670 | struct btrfs_qgroup *dst; | |
1671 | ||
1672 | src = find_qgroup_rb(fs_info, i_qgroups[0]); | |
1673 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); | |
1674 | ||
1675 | if (!src || !dst) { | |
1676 | ret = -EINVAL; | |
1677 | goto unlock; | |
1678 | } | |
1679 | ||
1680 | dst->excl = src->excl + level_size; | |
1681 | dst->excl_cmpr = src->excl_cmpr + level_size; | |
1682 | i_qgroups += 2; | |
1683 | } | |
1684 | ||
1685 | unlock: | |
1686 | spin_unlock(&fs_info->qgroup_lock); | |
1687 | out: | |
f2f6ed3d | 1688 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
bed92eae AJ |
1689 | return ret; |
1690 | } | |
1691 | ||
1692 | /* | |
1693 | * reserve some space for a qgroup and all its parents. The reservation takes | |
1694 | * place with start_transaction or dealloc_reserve, similar to ENOSPC | |
1695 | * accounting. If not enough space is available, EDQUOT is returned. | |
1696 | * We assume that the requested space is new for all qgroups. | |
1697 | */ | |
1698 | int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes) | |
1699 | { | |
1700 | struct btrfs_root *quota_root; | |
1701 | struct btrfs_qgroup *qgroup; | |
1702 | struct btrfs_fs_info *fs_info = root->fs_info; | |
1703 | u64 ref_root = root->root_key.objectid; | |
1704 | int ret = 0; | |
bed92eae AJ |
1705 | struct ulist_node *unode; |
1706 | struct ulist_iterator uiter; | |
1707 | ||
1708 | if (!is_fstree(ref_root)) | |
1709 | return 0; | |
1710 | ||
1711 | if (num_bytes == 0) | |
1712 | return 0; | |
1713 | ||
1714 | spin_lock(&fs_info->qgroup_lock); | |
1715 | quota_root = fs_info->quota_root; | |
1716 | if (!quota_root) | |
1717 | goto out; | |
1718 | ||
1719 | qgroup = find_qgroup_rb(fs_info, ref_root); | |
1720 | if (!qgroup) | |
1721 | goto out; | |
1722 | ||
1723 | /* | |
1724 | * in a first step, we check all affected qgroups if any limits would | |
1725 | * be exceeded | |
1726 | */ | |
1e8f9158 WS |
1727 | ulist_reinit(fs_info->qgroup_ulist); |
1728 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, | |
3c97185c WS |
1729 | (uintptr_t)qgroup, GFP_ATOMIC); |
1730 | if (ret < 0) | |
1731 | goto out; | |
bed92eae | 1732 | ULIST_ITER_INIT(&uiter); |
1e8f9158 | 1733 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
bed92eae AJ |
1734 | struct btrfs_qgroup *qg; |
1735 | struct btrfs_qgroup_list *glist; | |
1736 | ||
995e01b7 | 1737 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
bed92eae AJ |
1738 | |
1739 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) && | |
b4fcd6be | 1740 | qg->reserved + (s64)qg->rfer + num_bytes > |
720f1e20 | 1741 | qg->max_rfer) { |
bed92eae | 1742 | ret = -EDQUOT; |
720f1e20 WS |
1743 | goto out; |
1744 | } | |
bed92eae AJ |
1745 | |
1746 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) && | |
b4fcd6be | 1747 | qg->reserved + (s64)qg->excl + num_bytes > |
720f1e20 | 1748 | qg->max_excl) { |
bed92eae | 1749 | ret = -EDQUOT; |
720f1e20 WS |
1750 | goto out; |
1751 | } | |
bed92eae AJ |
1752 | |
1753 | list_for_each_entry(glist, &qg->groups, next_group) { | |
1e8f9158 WS |
1754 | ret = ulist_add(fs_info->qgroup_ulist, |
1755 | glist->group->qgroupid, | |
3c97185c WS |
1756 | (uintptr_t)glist->group, GFP_ATOMIC); |
1757 | if (ret < 0) | |
1758 | goto out; | |
bed92eae AJ |
1759 | } |
1760 | } | |
3c97185c | 1761 | ret = 0; |
bed92eae AJ |
1762 | /* |
1763 | * no limits exceeded, now record the reservation into all qgroups | |
1764 | */ | |
1765 | ULIST_ITER_INIT(&uiter); | |
1e8f9158 | 1766 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
bed92eae AJ |
1767 | struct btrfs_qgroup *qg; |
1768 | ||
995e01b7 | 1769 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
bed92eae AJ |
1770 | |
1771 | qg->reserved += num_bytes; | |
1772 | } | |
1773 | ||
1774 | out: | |
1775 | spin_unlock(&fs_info->qgroup_lock); | |
bed92eae AJ |
1776 | return ret; |
1777 | } | |
1778 | ||
1779 | void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes) | |
1780 | { | |
1781 | struct btrfs_root *quota_root; | |
1782 | struct btrfs_qgroup *qgroup; | |
1783 | struct btrfs_fs_info *fs_info = root->fs_info; | |
bed92eae AJ |
1784 | struct ulist_node *unode; |
1785 | struct ulist_iterator uiter; | |
1786 | u64 ref_root = root->root_key.objectid; | |
3c97185c | 1787 | int ret = 0; |
bed92eae AJ |
1788 | |
1789 | if (!is_fstree(ref_root)) | |
1790 | return; | |
1791 | ||
1792 | if (num_bytes == 0) | |
1793 | return; | |
1794 | ||
1795 | spin_lock(&fs_info->qgroup_lock); | |
1796 | ||
1797 | quota_root = fs_info->quota_root; | |
1798 | if (!quota_root) | |
1799 | goto out; | |
1800 | ||
1801 | qgroup = find_qgroup_rb(fs_info, ref_root); | |
1802 | if (!qgroup) | |
1803 | goto out; | |
1804 | ||
1e8f9158 WS |
1805 | ulist_reinit(fs_info->qgroup_ulist); |
1806 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, | |
3c97185c WS |
1807 | (uintptr_t)qgroup, GFP_ATOMIC); |
1808 | if (ret < 0) | |
1809 | goto out; | |
bed92eae | 1810 | ULIST_ITER_INIT(&uiter); |
1e8f9158 | 1811 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
bed92eae AJ |
1812 | struct btrfs_qgroup *qg; |
1813 | struct btrfs_qgroup_list *glist; | |
1814 | ||
995e01b7 | 1815 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
bed92eae AJ |
1816 | |
1817 | qg->reserved -= num_bytes; | |
1818 | ||
1819 | list_for_each_entry(glist, &qg->groups, next_group) { | |
1e8f9158 WS |
1820 | ret = ulist_add(fs_info->qgroup_ulist, |
1821 | glist->group->qgroupid, | |
3c97185c WS |
1822 | (uintptr_t)glist->group, GFP_ATOMIC); |
1823 | if (ret < 0) | |
1824 | goto out; | |
bed92eae AJ |
1825 | } |
1826 | } | |
1827 | ||
1828 | out: | |
1829 | spin_unlock(&fs_info->qgroup_lock); | |
bed92eae AJ |
1830 | } |
1831 | ||
1832 | void assert_qgroups_uptodate(struct btrfs_trans_handle *trans) | |
1833 | { | |
1834 | if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq) | |
1835 | return; | |
efe120a0 FH |
1836 | btrfs_err(trans->root->fs_info, |
1837 | "qgroups not uptodate in trans handle %p: list is%s empty, " | |
1838 | "seq is %#x.%x", | |
bed92eae | 1839 | trans, list_empty(&trans->qgroup_ref_list) ? "" : " not", |
fc36ed7e JS |
1840 | (u32)(trans->delayed_ref_elem.seq >> 32), |
1841 | (u32)trans->delayed_ref_elem.seq); | |
bed92eae AJ |
1842 | BUG(); |
1843 | } | |
2f232036 JS |
1844 | |
1845 | /* | |
1846 | * returns < 0 on error, 0 when more leafs are to be scanned. | |
1847 | * returns 1 when done, 2 when done and FLAG_INCONSISTENT was cleared. | |
1848 | */ | |
1849 | static int | |
b382a324 | 1850 | qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path, |
2f232036 JS |
1851 | struct btrfs_trans_handle *trans, struct ulist *tmp, |
1852 | struct extent_buffer *scratch_leaf) | |
1853 | { | |
1854 | struct btrfs_key found; | |
2f232036 JS |
1855 | struct ulist *roots = NULL; |
1856 | struct ulist_node *unode; | |
1857 | struct ulist_iterator uiter; | |
1858 | struct seq_list tree_mod_seq_elem = {}; | |
1859 | u64 seq; | |
1860 | int slot; | |
1861 | int ret; | |
1862 | ||
1863 | path->leave_spinning = 1; | |
1864 | mutex_lock(&fs_info->qgroup_rescan_lock); | |
1865 | ret = btrfs_search_slot_for_read(fs_info->extent_root, | |
1866 | &fs_info->qgroup_rescan_progress, | |
1867 | path, 1, 0); | |
1868 | ||
1869 | pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n", | |
c1c9ff7c | 1870 | fs_info->qgroup_rescan_progress.objectid, |
2f232036 | 1871 | fs_info->qgroup_rescan_progress.type, |
c1c9ff7c | 1872 | fs_info->qgroup_rescan_progress.offset, ret); |
2f232036 JS |
1873 | |
1874 | if (ret) { | |
1875 | /* | |
1876 | * The rescan is about to end, we will not be scanning any | |
1877 | * further blocks. We cannot unset the RESCAN flag here, because | |
1878 | * we want to commit the transaction if everything went well. | |
1879 | * To make the live accounting work in this phase, we set our | |
1880 | * scan progress pointer such that every real extent objectid | |
1881 | * will be smaller. | |
1882 | */ | |
1883 | fs_info->qgroup_rescan_progress.objectid = (u64)-1; | |
1884 | btrfs_release_path(path); | |
1885 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
1886 | return ret; | |
1887 | } | |
1888 | ||
1889 | btrfs_item_key_to_cpu(path->nodes[0], &found, | |
1890 | btrfs_header_nritems(path->nodes[0]) - 1); | |
1891 | fs_info->qgroup_rescan_progress.objectid = found.objectid + 1; | |
1892 | ||
1893 | btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem); | |
1894 | memcpy(scratch_leaf, path->nodes[0], sizeof(*scratch_leaf)); | |
1895 | slot = path->slots[0]; | |
1896 | btrfs_release_path(path); | |
1897 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
1898 | ||
1899 | for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) { | |
3a6d75e8 JB |
1900 | u64 num_bytes; |
1901 | ||
2f232036 | 1902 | btrfs_item_key_to_cpu(scratch_leaf, &found, slot); |
3a6d75e8 JB |
1903 | if (found.type != BTRFS_EXTENT_ITEM_KEY && |
1904 | found.type != BTRFS_METADATA_ITEM_KEY) | |
2f232036 | 1905 | continue; |
3a6d75e8 JB |
1906 | if (found.type == BTRFS_METADATA_ITEM_KEY) |
1907 | num_bytes = fs_info->extent_root->leafsize; | |
1908 | else | |
1909 | num_bytes = found.offset; | |
1910 | ||
2f232036 JS |
1911 | ret = btrfs_find_all_roots(trans, fs_info, found.objectid, |
1912 | tree_mod_seq_elem.seq, &roots); | |
1913 | if (ret < 0) | |
1914 | goto out; | |
1915 | spin_lock(&fs_info->qgroup_lock); | |
1916 | seq = fs_info->qgroup_seq; | |
1917 | fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ | |
1918 | ||
1919 | ret = qgroup_account_ref_step1(fs_info, roots, tmp, seq); | |
1920 | if (ret) { | |
1921 | spin_unlock(&fs_info->qgroup_lock); | |
1922 | ulist_free(roots); | |
1923 | goto out; | |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | * step2 of btrfs_qgroup_account_ref works from a single root, | |
1928 | * we're doing all at once here. | |
1929 | */ | |
1930 | ulist_reinit(tmp); | |
1931 | ULIST_ITER_INIT(&uiter); | |
1932 | while ((unode = ulist_next(roots, &uiter))) { | |
1933 | struct btrfs_qgroup *qg; | |
1934 | ||
1935 | qg = find_qgroup_rb(fs_info, unode->val); | |
1936 | if (!qg) | |
1937 | continue; | |
1938 | ||
1939 | ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, | |
1940 | GFP_ATOMIC); | |
1941 | if (ret < 0) { | |
1942 | spin_unlock(&fs_info->qgroup_lock); | |
1943 | ulist_free(roots); | |
1944 | goto out; | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | /* this loop is similar to step 2 of btrfs_qgroup_account_ref */ | |
1949 | ULIST_ITER_INIT(&uiter); | |
1950 | while ((unode = ulist_next(tmp, &uiter))) { | |
1951 | struct btrfs_qgroup *qg; | |
1952 | struct btrfs_qgroup_list *glist; | |
1953 | ||
1954 | qg = (struct btrfs_qgroup *)(uintptr_t) unode->aux; | |
3a6d75e8 JB |
1955 | qg->rfer += num_bytes; |
1956 | qg->rfer_cmpr += num_bytes; | |
2f232036 JS |
1957 | WARN_ON(qg->tag >= seq); |
1958 | if (qg->refcnt - seq == roots->nnodes) { | |
3a6d75e8 JB |
1959 | qg->excl += num_bytes; |
1960 | qg->excl_cmpr += num_bytes; | |
2f232036 JS |
1961 | } |
1962 | qgroup_dirty(fs_info, qg); | |
1963 | ||
1964 | list_for_each_entry(glist, &qg->groups, next_group) { | |
1965 | ret = ulist_add(tmp, glist->group->qgroupid, | |
1966 | (uintptr_t)glist->group, | |
1967 | GFP_ATOMIC); | |
1968 | if (ret < 0) { | |
1969 | spin_unlock(&fs_info->qgroup_lock); | |
1970 | ulist_free(roots); | |
1971 | goto out; | |
1972 | } | |
1973 | } | |
1974 | } | |
1975 | ||
1976 | spin_unlock(&fs_info->qgroup_lock); | |
1977 | ulist_free(roots); | |
1978 | ret = 0; | |
1979 | } | |
1980 | ||
1981 | out: | |
1982 | btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem); | |
1983 | ||
1984 | return ret; | |
1985 | } | |
1986 | ||
d458b054 | 1987 | static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) |
2f232036 | 1988 | { |
b382a324 JS |
1989 | struct btrfs_fs_info *fs_info = container_of(work, struct btrfs_fs_info, |
1990 | qgroup_rescan_work); | |
2f232036 JS |
1991 | struct btrfs_path *path; |
1992 | struct btrfs_trans_handle *trans = NULL; | |
2f232036 JS |
1993 | struct ulist *tmp = NULL; |
1994 | struct extent_buffer *scratch_leaf = NULL; | |
1995 | int err = -ENOMEM; | |
1996 | ||
1997 | path = btrfs_alloc_path(); | |
1998 | if (!path) | |
1999 | goto out; | |
2000 | tmp = ulist_alloc(GFP_NOFS); | |
2001 | if (!tmp) | |
2002 | goto out; | |
2003 | scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS); | |
2004 | if (!scratch_leaf) | |
2005 | goto out; | |
2006 | ||
2007 | err = 0; | |
2008 | while (!err) { | |
2009 | trans = btrfs_start_transaction(fs_info->fs_root, 0); | |
2010 | if (IS_ERR(trans)) { | |
2011 | err = PTR_ERR(trans); | |
2012 | break; | |
2013 | } | |
2014 | if (!fs_info->quota_enabled) { | |
2015 | err = -EINTR; | |
2016 | } else { | |
b382a324 | 2017 | err = qgroup_rescan_leaf(fs_info, path, trans, |
2f232036 JS |
2018 | tmp, scratch_leaf); |
2019 | } | |
2020 | if (err > 0) | |
2021 | btrfs_commit_transaction(trans, fs_info->fs_root); | |
2022 | else | |
2023 | btrfs_end_transaction(trans, fs_info->fs_root); | |
2024 | } | |
2025 | ||
2026 | out: | |
2027 | kfree(scratch_leaf); | |
2028 | ulist_free(tmp); | |
2029 | btrfs_free_path(path); | |
2f232036 JS |
2030 | |
2031 | mutex_lock(&fs_info->qgroup_rescan_lock); | |
2032 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; | |
2033 | ||
2034 | if (err == 2 && | |
2035 | fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) { | |
2036 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
2037 | } else if (err < 0) { | |
2038 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; | |
2039 | } | |
2040 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
2041 | ||
2042 | if (err >= 0) { | |
efe120a0 | 2043 | btrfs_info(fs_info, "qgroup scan completed%s", |
2f232036 JS |
2044 | err == 2 ? " (inconsistency flag cleared)" : ""); |
2045 | } else { | |
efe120a0 | 2046 | btrfs_err(fs_info, "qgroup scan failed with %d", err); |
2f232036 | 2047 | } |
57254b6e JS |
2048 | |
2049 | complete_all(&fs_info->qgroup_rescan_completion); | |
2f232036 JS |
2050 | } |
2051 | ||
b382a324 JS |
2052 | /* |
2053 | * Checks that (a) no rescan is running and (b) quota is enabled. Allocates all | |
2054 | * memory required for the rescan context. | |
2055 | */ | |
2056 | static int | |
2057 | qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid, | |
2058 | int init_flags) | |
2f232036 JS |
2059 | { |
2060 | int ret = 0; | |
2f232036 | 2061 | |
b382a324 JS |
2062 | if (!init_flags && |
2063 | (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) || | |
2064 | !(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))) { | |
2065 | ret = -EINVAL; | |
2066 | goto err; | |
2067 | } | |
2f232036 JS |
2068 | |
2069 | mutex_lock(&fs_info->qgroup_rescan_lock); | |
2070 | spin_lock(&fs_info->qgroup_lock); | |
b382a324 JS |
2071 | |
2072 | if (init_flags) { | |
2073 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) | |
2074 | ret = -EINPROGRESS; | |
2075 | else if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) | |
2076 | ret = -EINVAL; | |
2077 | ||
2078 | if (ret) { | |
2079 | spin_unlock(&fs_info->qgroup_lock); | |
2080 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
2081 | goto err; | |
2082 | } | |
2083 | ||
2084 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN; | |
2f232036 JS |
2085 | } |
2086 | ||
2f232036 JS |
2087 | memset(&fs_info->qgroup_rescan_progress, 0, |
2088 | sizeof(fs_info->qgroup_rescan_progress)); | |
b382a324 JS |
2089 | fs_info->qgroup_rescan_progress.objectid = progress_objectid; |
2090 | ||
2091 | spin_unlock(&fs_info->qgroup_lock); | |
2092 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
2093 | ||
57254b6e | 2094 | init_completion(&fs_info->qgroup_rescan_completion); |
2f232036 | 2095 | |
b382a324 JS |
2096 | memset(&fs_info->qgroup_rescan_work, 0, |
2097 | sizeof(fs_info->qgroup_rescan_work)); | |
fc97fab0 QW |
2098 | btrfs_init_work(&fs_info->qgroup_rescan_work, |
2099 | btrfs_qgroup_rescan_worker, NULL, NULL); | |
b382a324 JS |
2100 | |
2101 | if (ret) { | |
2102 | err: | |
efe120a0 | 2103 | btrfs_info(fs_info, "qgroup_rescan_init failed with %d", ret); |
b382a324 JS |
2104 | return ret; |
2105 | } | |
2106 | ||
2107 | return 0; | |
2108 | } | |
2109 | ||
2110 | static void | |
2111 | qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info) | |
2112 | { | |
2113 | struct rb_node *n; | |
2114 | struct btrfs_qgroup *qgroup; | |
2115 | ||
2116 | spin_lock(&fs_info->qgroup_lock); | |
2f232036 JS |
2117 | /* clear all current qgroup tracking information */ |
2118 | for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) { | |
2119 | qgroup = rb_entry(n, struct btrfs_qgroup, node); | |
2120 | qgroup->rfer = 0; | |
2121 | qgroup->rfer_cmpr = 0; | |
2122 | qgroup->excl = 0; | |
2123 | qgroup->excl_cmpr = 0; | |
2124 | } | |
2125 | spin_unlock(&fs_info->qgroup_lock); | |
b382a324 | 2126 | } |
2f232036 | 2127 | |
b382a324 JS |
2128 | int |
2129 | btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) | |
2130 | { | |
2131 | int ret = 0; | |
2132 | struct btrfs_trans_handle *trans; | |
2133 | ||
2134 | ret = qgroup_rescan_init(fs_info, 0, 1); | |
2135 | if (ret) | |
2136 | return ret; | |
2137 | ||
2138 | /* | |
2139 | * We have set the rescan_progress to 0, which means no more | |
2140 | * delayed refs will be accounted by btrfs_qgroup_account_ref. | |
2141 | * However, btrfs_qgroup_account_ref may be right after its call | |
2142 | * to btrfs_find_all_roots, in which case it would still do the | |
2143 | * accounting. | |
2144 | * To solve this, we're committing the transaction, which will | |
2145 | * ensure we run all delayed refs and only after that, we are | |
2146 | * going to clear all tracking information for a clean start. | |
2147 | */ | |
2148 | ||
2149 | trans = btrfs_join_transaction(fs_info->fs_root); | |
2150 | if (IS_ERR(trans)) { | |
2151 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; | |
2152 | return PTR_ERR(trans); | |
2153 | } | |
2154 | ret = btrfs_commit_transaction(trans, fs_info->fs_root); | |
2155 | if (ret) { | |
2156 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; | |
2157 | return ret; | |
2158 | } | |
2159 | ||
2160 | qgroup_rescan_zero_tracking(fs_info); | |
2161 | ||
fc97fab0 QW |
2162 | btrfs_queue_work(fs_info->qgroup_rescan_workers, |
2163 | &fs_info->qgroup_rescan_work); | |
2f232036 JS |
2164 | |
2165 | return 0; | |
2166 | } | |
57254b6e JS |
2167 | |
2168 | int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info) | |
2169 | { | |
2170 | int running; | |
2171 | int ret = 0; | |
2172 | ||
2173 | mutex_lock(&fs_info->qgroup_rescan_lock); | |
2174 | spin_lock(&fs_info->qgroup_lock); | |
2175 | running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN; | |
2176 | spin_unlock(&fs_info->qgroup_lock); | |
2177 | mutex_unlock(&fs_info->qgroup_rescan_lock); | |
2178 | ||
2179 | if (running) | |
2180 | ret = wait_for_completion_interruptible( | |
2181 | &fs_info->qgroup_rescan_completion); | |
2182 | ||
2183 | return ret; | |
2184 | } | |
b382a324 JS |
2185 | |
2186 | /* | |
2187 | * this is only called from open_ctree where we're still single threaded, thus | |
2188 | * locking is omitted here. | |
2189 | */ | |
2190 | void | |
2191 | btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info) | |
2192 | { | |
2193 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) | |
fc97fab0 QW |
2194 | btrfs_queue_work(fs_info->qgroup_rescan_workers, |
2195 | &fs_info->qgroup_rescan_work); | |
b382a324 | 2196 | } |