Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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> |
Filipe Brandenburger | 55e301f | 2013-01-29 06:04:50 +0000 | [diff] [blame] | 26 | #include <linux/btrfs.h> |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 27 | |
| 28 | #include "ctree.h" |
| 29 | #include "transaction.h" |
| 30 | #include "disk-io.h" |
| 31 | #include "locking.h" |
| 32 | #include "ulist.h" |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 33 | #include "backref.h" |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 34 | #include "extent_io.h" |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 35 | |
| 36 | /* TODO XXX FIXME |
| 37 | * - subvol delete -> delete when ref goes to 0? delete limits also? |
| 38 | * - reorganize keys |
| 39 | * - compressed |
| 40 | * - sync |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 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); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 105 | |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 106 | /* must be called with qgroup_ioctl_lock held */ |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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 | |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 160 | static void __del_qgroup_rb(struct btrfs_qgroup *qgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 161 | { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 162 | struct btrfs_qgroup_list *list; |
| 163 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 164 | list_del(&qgroup->dirty); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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); |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 181 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 182 | |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 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); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 259 | u64 rescan_progress = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 260 | |
| 261 | if (!fs_info->quota_enabled) |
| 262 | return 0; |
| 263 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 264 | fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS); |
| 265 | if (!fs_info->qgroup_ulist) { |
| 266 | ret = -ENOMEM; |
| 267 | goto out; |
| 268 | } |
| 269 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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) { |
| 304 | printk(KERN_ERR |
| 305 | "btrfs: old qgroup version, quota disabled\n"); |
| 306 | goto out; |
| 307 | } |
| 308 | if (btrfs_qgroup_status_generation(l, ptr) != |
| 309 | fs_info->generation) { |
| 310 | flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 311 | printk(KERN_ERR |
| 312 | "btrfs: qgroup generation mismatch, " |
| 313 | "marked as inconsistent\n"); |
| 314 | } |
| 315 | fs_info->qgroup_flags = btrfs_qgroup_status_flags(l, |
| 316 | ptr); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 317 | rescan_progress = btrfs_qgroup_status_rescan(l, ptr); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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)) { |
| 328 | printk(KERN_ERR "btrfs: inconsitent qgroup config\n"); |
| 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); |
Arne Jansen | ff24858 | 2013-01-17 01:22:08 -0700 | [diff] [blame] | 398 | if (ret == -ENOENT) { |
| 399 | printk(KERN_WARNING |
| 400 | "btrfs: orphan qgroup relation 0x%llx->0x%llx\n", |
| 401 | (unsigned long long)found_key.objectid, |
| 402 | (unsigned long long)found_key.offset); |
| 403 | ret = 0; /* ignore the error */ |
| 404 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 405 | if (ret) |
| 406 | goto out; |
| 407 | next2: |
| 408 | ret = btrfs_next_item(quota_root, path); |
| 409 | if (ret < 0) |
| 410 | goto out; |
| 411 | if (ret) |
| 412 | break; |
| 413 | } |
| 414 | out: |
| 415 | fs_info->qgroup_flags |= flags; |
| 416 | if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) { |
| 417 | fs_info->quota_enabled = 0; |
| 418 | fs_info->pending_quota_state = 0; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 419 | } else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN && |
| 420 | ret >= 0) { |
| 421 | ret = qgroup_rescan_init(fs_info, rescan_progress, 0); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 422 | } |
| 423 | btrfs_free_path(path); |
| 424 | |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 425 | if (ret < 0) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 426 | ulist_free(fs_info->qgroup_ulist); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 427 | fs_info->qgroup_ulist = NULL; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 428 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 429 | } |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 430 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 431 | return ret < 0 ? ret : 0; |
| 432 | } |
| 433 | |
| 434 | /* |
Wang Shilong | e685da1 | 2013-08-14 09:13:37 +0800 | [diff] [blame^] | 435 | * This is called from close_ctree() or open_ctree() or btrfs_quota_disable(), |
| 436 | * first two are in single-threaded paths.And for the third one, we have set |
| 437 | * quota_root to be null with qgroup_lock held before, so it is safe to clean |
| 438 | * up the in-memory structures without qgroup_lock held. |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 439 | */ |
| 440 | void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info) |
| 441 | { |
| 442 | struct rb_node *n; |
| 443 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 444 | |
| 445 | while ((n = rb_first(&fs_info->qgroup_tree))) { |
| 446 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 447 | rb_erase(n, &fs_info->qgroup_tree); |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 448 | __del_qgroup_rb(qgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 449 | } |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 450 | /* |
| 451 | * we call btrfs_free_qgroup_config() when umounting |
| 452 | * filesystem and disabling quota, so we set qgroup_ulit |
| 453 | * to be null here to avoid double free. |
| 454 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 455 | ulist_free(fs_info->qgroup_ulist); |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 456 | fs_info->qgroup_ulist = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 457 | } |
| 458 | |
| 459 | static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, |
| 460 | struct btrfs_root *quota_root, |
| 461 | u64 src, u64 dst) |
| 462 | { |
| 463 | int ret; |
| 464 | struct btrfs_path *path; |
| 465 | struct btrfs_key key; |
| 466 | |
| 467 | path = btrfs_alloc_path(); |
| 468 | if (!path) |
| 469 | return -ENOMEM; |
| 470 | |
| 471 | key.objectid = src; |
| 472 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 473 | key.offset = dst; |
| 474 | |
| 475 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, 0); |
| 476 | |
| 477 | btrfs_mark_buffer_dirty(path->nodes[0]); |
| 478 | |
| 479 | btrfs_free_path(path); |
| 480 | return ret; |
| 481 | } |
| 482 | |
| 483 | static int del_qgroup_relation_item(struct btrfs_trans_handle *trans, |
| 484 | struct btrfs_root *quota_root, |
| 485 | u64 src, u64 dst) |
| 486 | { |
| 487 | int ret; |
| 488 | struct btrfs_path *path; |
| 489 | struct btrfs_key key; |
| 490 | |
| 491 | path = btrfs_alloc_path(); |
| 492 | if (!path) |
| 493 | return -ENOMEM; |
| 494 | |
| 495 | key.objectid = src; |
| 496 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 497 | key.offset = dst; |
| 498 | |
| 499 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 500 | if (ret < 0) |
| 501 | goto out; |
| 502 | |
| 503 | if (ret > 0) { |
| 504 | ret = -ENOENT; |
| 505 | goto out; |
| 506 | } |
| 507 | |
| 508 | ret = btrfs_del_item(trans, quota_root, path); |
| 509 | out: |
| 510 | btrfs_free_path(path); |
| 511 | return ret; |
| 512 | } |
| 513 | |
| 514 | static int add_qgroup_item(struct btrfs_trans_handle *trans, |
| 515 | struct btrfs_root *quota_root, u64 qgroupid) |
| 516 | { |
| 517 | int ret; |
| 518 | struct btrfs_path *path; |
| 519 | struct btrfs_qgroup_info_item *qgroup_info; |
| 520 | struct btrfs_qgroup_limit_item *qgroup_limit; |
| 521 | struct extent_buffer *leaf; |
| 522 | struct btrfs_key key; |
| 523 | |
| 524 | path = btrfs_alloc_path(); |
| 525 | if (!path) |
| 526 | return -ENOMEM; |
| 527 | |
| 528 | key.objectid = 0; |
| 529 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 530 | key.offset = qgroupid; |
| 531 | |
| 532 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 533 | sizeof(*qgroup_info)); |
| 534 | if (ret) |
| 535 | goto out; |
| 536 | |
| 537 | leaf = path->nodes[0]; |
| 538 | qgroup_info = btrfs_item_ptr(leaf, path->slots[0], |
| 539 | struct btrfs_qgroup_info_item); |
| 540 | btrfs_set_qgroup_info_generation(leaf, qgroup_info, trans->transid); |
| 541 | btrfs_set_qgroup_info_rfer(leaf, qgroup_info, 0); |
| 542 | btrfs_set_qgroup_info_rfer_cmpr(leaf, qgroup_info, 0); |
| 543 | btrfs_set_qgroup_info_excl(leaf, qgroup_info, 0); |
| 544 | btrfs_set_qgroup_info_excl_cmpr(leaf, qgroup_info, 0); |
| 545 | |
| 546 | btrfs_mark_buffer_dirty(leaf); |
| 547 | |
| 548 | btrfs_release_path(path); |
| 549 | |
| 550 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 551 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 552 | sizeof(*qgroup_limit)); |
| 553 | if (ret) |
| 554 | goto out; |
| 555 | |
| 556 | leaf = path->nodes[0]; |
| 557 | qgroup_limit = btrfs_item_ptr(leaf, path->slots[0], |
| 558 | struct btrfs_qgroup_limit_item); |
| 559 | btrfs_set_qgroup_limit_flags(leaf, qgroup_limit, 0); |
| 560 | btrfs_set_qgroup_limit_max_rfer(leaf, qgroup_limit, 0); |
| 561 | btrfs_set_qgroup_limit_max_excl(leaf, qgroup_limit, 0); |
| 562 | btrfs_set_qgroup_limit_rsv_rfer(leaf, qgroup_limit, 0); |
| 563 | btrfs_set_qgroup_limit_rsv_excl(leaf, qgroup_limit, 0); |
| 564 | |
| 565 | btrfs_mark_buffer_dirty(leaf); |
| 566 | |
| 567 | ret = 0; |
| 568 | out: |
| 569 | btrfs_free_path(path); |
| 570 | return ret; |
| 571 | } |
| 572 | |
| 573 | static int del_qgroup_item(struct btrfs_trans_handle *trans, |
| 574 | struct btrfs_root *quota_root, u64 qgroupid) |
| 575 | { |
| 576 | int ret; |
| 577 | struct btrfs_path *path; |
| 578 | struct btrfs_key key; |
| 579 | |
| 580 | path = btrfs_alloc_path(); |
| 581 | if (!path) |
| 582 | return -ENOMEM; |
| 583 | |
| 584 | key.objectid = 0; |
| 585 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 586 | key.offset = qgroupid; |
| 587 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 588 | if (ret < 0) |
| 589 | goto out; |
| 590 | |
| 591 | if (ret > 0) { |
| 592 | ret = -ENOENT; |
| 593 | goto out; |
| 594 | } |
| 595 | |
| 596 | ret = btrfs_del_item(trans, quota_root, path); |
| 597 | if (ret) |
| 598 | goto out; |
| 599 | |
| 600 | btrfs_release_path(path); |
| 601 | |
| 602 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 603 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 604 | if (ret < 0) |
| 605 | goto out; |
| 606 | |
| 607 | if (ret > 0) { |
| 608 | ret = -ENOENT; |
| 609 | goto out; |
| 610 | } |
| 611 | |
| 612 | ret = btrfs_del_item(trans, quota_root, path); |
| 613 | |
| 614 | out: |
| 615 | btrfs_free_path(path); |
| 616 | return ret; |
| 617 | } |
| 618 | |
| 619 | static int update_qgroup_limit_item(struct btrfs_trans_handle *trans, |
| 620 | struct btrfs_root *root, u64 qgroupid, |
| 621 | u64 flags, u64 max_rfer, u64 max_excl, |
| 622 | u64 rsv_rfer, u64 rsv_excl) |
| 623 | { |
| 624 | struct btrfs_path *path; |
| 625 | struct btrfs_key key; |
| 626 | struct extent_buffer *l; |
| 627 | struct btrfs_qgroup_limit_item *qgroup_limit; |
| 628 | int ret; |
| 629 | int slot; |
| 630 | |
| 631 | key.objectid = 0; |
| 632 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 633 | key.offset = qgroupid; |
| 634 | |
| 635 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 636 | if (!path) |
| 637 | return -ENOMEM; |
| 638 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 639 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
| 640 | if (ret > 0) |
| 641 | ret = -ENOENT; |
| 642 | |
| 643 | if (ret) |
| 644 | goto out; |
| 645 | |
| 646 | l = path->nodes[0]; |
| 647 | slot = path->slots[0]; |
| 648 | qgroup_limit = btrfs_item_ptr(l, path->slots[0], |
| 649 | struct btrfs_qgroup_limit_item); |
| 650 | btrfs_set_qgroup_limit_flags(l, qgroup_limit, flags); |
| 651 | btrfs_set_qgroup_limit_max_rfer(l, qgroup_limit, max_rfer); |
| 652 | btrfs_set_qgroup_limit_max_excl(l, qgroup_limit, max_excl); |
| 653 | btrfs_set_qgroup_limit_rsv_rfer(l, qgroup_limit, rsv_rfer); |
| 654 | btrfs_set_qgroup_limit_rsv_excl(l, qgroup_limit, rsv_excl); |
| 655 | |
| 656 | btrfs_mark_buffer_dirty(l); |
| 657 | |
| 658 | out: |
| 659 | btrfs_free_path(path); |
| 660 | return ret; |
| 661 | } |
| 662 | |
| 663 | static int update_qgroup_info_item(struct btrfs_trans_handle *trans, |
| 664 | struct btrfs_root *root, |
| 665 | struct btrfs_qgroup *qgroup) |
| 666 | { |
| 667 | struct btrfs_path *path; |
| 668 | struct btrfs_key key; |
| 669 | struct extent_buffer *l; |
| 670 | struct btrfs_qgroup_info_item *qgroup_info; |
| 671 | int ret; |
| 672 | int slot; |
| 673 | |
| 674 | key.objectid = 0; |
| 675 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 676 | key.offset = qgroup->qgroupid; |
| 677 | |
| 678 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 679 | if (!path) |
| 680 | return -ENOMEM; |
| 681 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 682 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
| 683 | if (ret > 0) |
| 684 | ret = -ENOENT; |
| 685 | |
| 686 | if (ret) |
| 687 | goto out; |
| 688 | |
| 689 | l = path->nodes[0]; |
| 690 | slot = path->slots[0]; |
| 691 | qgroup_info = btrfs_item_ptr(l, path->slots[0], |
| 692 | struct btrfs_qgroup_info_item); |
| 693 | btrfs_set_qgroup_info_generation(l, qgroup_info, trans->transid); |
| 694 | btrfs_set_qgroup_info_rfer(l, qgroup_info, qgroup->rfer); |
| 695 | btrfs_set_qgroup_info_rfer_cmpr(l, qgroup_info, qgroup->rfer_cmpr); |
| 696 | btrfs_set_qgroup_info_excl(l, qgroup_info, qgroup->excl); |
| 697 | btrfs_set_qgroup_info_excl_cmpr(l, qgroup_info, qgroup->excl_cmpr); |
| 698 | |
| 699 | btrfs_mark_buffer_dirty(l); |
| 700 | |
| 701 | out: |
| 702 | btrfs_free_path(path); |
| 703 | return ret; |
| 704 | } |
| 705 | |
| 706 | static int update_qgroup_status_item(struct btrfs_trans_handle *trans, |
| 707 | struct btrfs_fs_info *fs_info, |
| 708 | struct btrfs_root *root) |
| 709 | { |
| 710 | struct btrfs_path *path; |
| 711 | struct btrfs_key key; |
| 712 | struct extent_buffer *l; |
| 713 | struct btrfs_qgroup_status_item *ptr; |
| 714 | int ret; |
| 715 | int slot; |
| 716 | |
| 717 | key.objectid = 0; |
| 718 | key.type = BTRFS_QGROUP_STATUS_KEY; |
| 719 | key.offset = 0; |
| 720 | |
| 721 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 722 | if (!path) |
| 723 | return -ENOMEM; |
| 724 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 725 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
| 726 | if (ret > 0) |
| 727 | ret = -ENOENT; |
| 728 | |
| 729 | if (ret) |
| 730 | goto out; |
| 731 | |
| 732 | l = path->nodes[0]; |
| 733 | slot = path->slots[0]; |
| 734 | ptr = btrfs_item_ptr(l, slot, struct btrfs_qgroup_status_item); |
| 735 | btrfs_set_qgroup_status_flags(l, ptr, fs_info->qgroup_flags); |
| 736 | btrfs_set_qgroup_status_generation(l, ptr, trans->transid); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 737 | btrfs_set_qgroup_status_rescan(l, ptr, |
| 738 | fs_info->qgroup_rescan_progress.objectid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 739 | |
| 740 | btrfs_mark_buffer_dirty(l); |
| 741 | |
| 742 | out: |
| 743 | btrfs_free_path(path); |
| 744 | return ret; |
| 745 | } |
| 746 | |
| 747 | /* |
| 748 | * called with qgroup_lock held |
| 749 | */ |
| 750 | static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans, |
| 751 | struct btrfs_root *root) |
| 752 | { |
| 753 | struct btrfs_path *path; |
| 754 | struct btrfs_key key; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 755 | struct extent_buffer *leaf = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 756 | int ret; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 757 | int nr = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 758 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 759 | path = btrfs_alloc_path(); |
| 760 | if (!path) |
| 761 | return -ENOMEM; |
| 762 | |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 763 | path->leave_spinning = 1; |
| 764 | |
| 765 | key.objectid = 0; |
| 766 | key.offset = 0; |
| 767 | key.type = 0; |
| 768 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 769 | while (1) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 770 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 771 | if (ret < 0) |
| 772 | goto out; |
| 773 | leaf = path->nodes[0]; |
| 774 | nr = btrfs_header_nritems(leaf); |
| 775 | if (!nr) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 776 | break; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 777 | /* |
| 778 | * delete the leaf one by one |
| 779 | * since the whole tree is going |
| 780 | * to be deleted. |
| 781 | */ |
| 782 | path->slots[0] = 0; |
| 783 | ret = btrfs_del_items(trans, root, path, 0, nr); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 784 | if (ret) |
| 785 | goto out; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 786 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 787 | btrfs_release_path(path); |
| 788 | } |
| 789 | ret = 0; |
| 790 | out: |
| 791 | root->fs_info->pending_quota_state = 0; |
| 792 | btrfs_free_path(path); |
| 793 | return ret; |
| 794 | } |
| 795 | |
| 796 | int btrfs_quota_enable(struct btrfs_trans_handle *trans, |
| 797 | struct btrfs_fs_info *fs_info) |
| 798 | { |
| 799 | struct btrfs_root *quota_root; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 800 | struct btrfs_root *tree_root = fs_info->tree_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 801 | struct btrfs_path *path = NULL; |
| 802 | struct btrfs_qgroup_status_item *ptr; |
| 803 | struct extent_buffer *leaf; |
| 804 | struct btrfs_key key; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 805 | struct btrfs_key found_key; |
| 806 | struct btrfs_qgroup *qgroup = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 807 | int ret = 0; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 808 | int slot; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 809 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 810 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 811 | if (fs_info->quota_root) { |
| 812 | fs_info->pending_quota_state = 1; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 813 | goto out; |
| 814 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 815 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 816 | fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS); |
| 817 | if (!fs_info->qgroup_ulist) { |
| 818 | ret = -ENOMEM; |
| 819 | goto out; |
| 820 | } |
| 821 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 822 | /* |
| 823 | * initially create the quota tree |
| 824 | */ |
| 825 | quota_root = btrfs_create_tree(trans, fs_info, |
| 826 | BTRFS_QUOTA_TREE_OBJECTID); |
| 827 | if (IS_ERR(quota_root)) { |
| 828 | ret = PTR_ERR(quota_root); |
| 829 | goto out; |
| 830 | } |
| 831 | |
| 832 | path = btrfs_alloc_path(); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 833 | if (!path) { |
| 834 | ret = -ENOMEM; |
| 835 | goto out_free_root; |
| 836 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 837 | |
| 838 | key.objectid = 0; |
| 839 | key.type = BTRFS_QGROUP_STATUS_KEY; |
| 840 | key.offset = 0; |
| 841 | |
| 842 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 843 | sizeof(*ptr)); |
| 844 | if (ret) |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 845 | goto out_free_path; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 846 | |
| 847 | leaf = path->nodes[0]; |
| 848 | ptr = btrfs_item_ptr(leaf, path->slots[0], |
| 849 | struct btrfs_qgroup_status_item); |
| 850 | btrfs_set_qgroup_status_generation(leaf, ptr, trans->transid); |
| 851 | btrfs_set_qgroup_status_version(leaf, ptr, BTRFS_QGROUP_STATUS_VERSION); |
| 852 | fs_info->qgroup_flags = BTRFS_QGROUP_STATUS_FLAG_ON | |
| 853 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 854 | btrfs_set_qgroup_status_flags(leaf, ptr, fs_info->qgroup_flags); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 855 | btrfs_set_qgroup_status_rescan(leaf, ptr, 0); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 856 | |
| 857 | btrfs_mark_buffer_dirty(leaf); |
| 858 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 859 | key.objectid = 0; |
| 860 | key.type = BTRFS_ROOT_REF_KEY; |
| 861 | key.offset = 0; |
| 862 | |
| 863 | btrfs_release_path(path); |
| 864 | ret = btrfs_search_slot_for_read(tree_root, &key, path, 1, 0); |
| 865 | if (ret > 0) |
| 866 | goto out_add_root; |
| 867 | if (ret < 0) |
| 868 | goto out_free_path; |
| 869 | |
| 870 | |
| 871 | while (1) { |
| 872 | slot = path->slots[0]; |
| 873 | leaf = path->nodes[0]; |
| 874 | btrfs_item_key_to_cpu(leaf, &found_key, slot); |
| 875 | |
| 876 | if (found_key.type == BTRFS_ROOT_REF_KEY) { |
| 877 | ret = add_qgroup_item(trans, quota_root, |
| 878 | found_key.offset); |
| 879 | if (ret) |
| 880 | goto out_free_path; |
| 881 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 882 | qgroup = add_qgroup_rb(fs_info, found_key.offset); |
| 883 | if (IS_ERR(qgroup)) { |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 884 | ret = PTR_ERR(qgroup); |
| 885 | goto out_free_path; |
| 886 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 887 | } |
| 888 | ret = btrfs_next_item(tree_root, path); |
| 889 | if (ret < 0) |
| 890 | goto out_free_path; |
| 891 | if (ret) |
| 892 | break; |
| 893 | } |
| 894 | |
| 895 | out_add_root: |
| 896 | btrfs_release_path(path); |
| 897 | ret = add_qgroup_item(trans, quota_root, BTRFS_FS_TREE_OBJECTID); |
| 898 | if (ret) |
| 899 | goto out_free_path; |
| 900 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 901 | qgroup = add_qgroup_rb(fs_info, BTRFS_FS_TREE_OBJECTID); |
| 902 | if (IS_ERR(qgroup)) { |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 903 | ret = PTR_ERR(qgroup); |
| 904 | goto out_free_path; |
| 905 | } |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 906 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 907 | fs_info->quota_root = quota_root; |
| 908 | fs_info->pending_quota_state = 1; |
| 909 | spin_unlock(&fs_info->qgroup_lock); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 910 | out_free_path: |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 911 | btrfs_free_path(path); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 912 | out_free_root: |
| 913 | if (ret) { |
| 914 | free_extent_buffer(quota_root->node); |
| 915 | free_extent_buffer(quota_root->commit_root); |
| 916 | kfree(quota_root); |
| 917 | } |
| 918 | out: |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 919 | if (ret) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 920 | ulist_free(fs_info->qgroup_ulist); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 921 | fs_info->qgroup_ulist = NULL; |
| 922 | } |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 923 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 924 | return ret; |
| 925 | } |
| 926 | |
| 927 | int btrfs_quota_disable(struct btrfs_trans_handle *trans, |
| 928 | struct btrfs_fs_info *fs_info) |
| 929 | { |
| 930 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 931 | struct btrfs_root *quota_root; |
| 932 | int ret = 0; |
| 933 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 934 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 935 | if (!fs_info->quota_root) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 936 | goto out; |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 937 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 938 | fs_info->quota_enabled = 0; |
| 939 | fs_info->pending_quota_state = 0; |
| 940 | quota_root = fs_info->quota_root; |
| 941 | fs_info->quota_root = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 942 | spin_unlock(&fs_info->qgroup_lock); |
| 943 | |
Wang Shilong | e685da1 | 2013-08-14 09:13:37 +0800 | [diff] [blame^] | 944 | btrfs_free_qgroup_config(fs_info); |
| 945 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 946 | if (!quota_root) { |
| 947 | ret = -EINVAL; |
| 948 | goto out; |
| 949 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 950 | |
| 951 | ret = btrfs_clean_quota_tree(trans, quota_root); |
| 952 | if (ret) |
| 953 | goto out; |
| 954 | |
| 955 | ret = btrfs_del_root(trans, tree_root, "a_root->root_key); |
| 956 | if (ret) |
| 957 | goto out; |
| 958 | |
| 959 | list_del("a_root->dirty_list); |
| 960 | |
| 961 | btrfs_tree_lock(quota_root->node); |
| 962 | clean_tree_block(trans, tree_root, quota_root->node); |
| 963 | btrfs_tree_unlock(quota_root->node); |
| 964 | btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1); |
| 965 | |
| 966 | free_extent_buffer(quota_root->node); |
| 967 | free_extent_buffer(quota_root->commit_root); |
| 968 | kfree(quota_root); |
| 969 | out: |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 970 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 971 | return ret; |
| 972 | } |
| 973 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 974 | static void qgroup_dirty(struct btrfs_fs_info *fs_info, |
| 975 | struct btrfs_qgroup *qgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 976 | { |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 977 | if (list_empty(&qgroup->dirty)) |
| 978 | list_add(&qgroup->dirty, &fs_info->dirty_qgroups); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 979 | } |
| 980 | |
| 981 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, |
| 982 | struct btrfs_fs_info *fs_info, u64 src, u64 dst) |
| 983 | { |
| 984 | struct btrfs_root *quota_root; |
Wang Shilong | b7fef4f | 2013-04-07 10:50:18 +0000 | [diff] [blame] | 985 | struct btrfs_qgroup *parent; |
| 986 | struct btrfs_qgroup *member; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 987 | struct btrfs_qgroup_list *list; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 988 | int ret = 0; |
| 989 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 990 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 991 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 992 | if (!quota_root) { |
| 993 | ret = -EINVAL; |
| 994 | goto out; |
| 995 | } |
Wang Shilong | b7fef4f | 2013-04-07 10:50:18 +0000 | [diff] [blame] | 996 | member = find_qgroup_rb(fs_info, src); |
| 997 | parent = find_qgroup_rb(fs_info, dst); |
| 998 | if (!member || !parent) { |
| 999 | ret = -EINVAL; |
| 1000 | goto out; |
| 1001 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1002 | |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1003 | /* check if such qgroup relation exist firstly */ |
| 1004 | list_for_each_entry(list, &member->groups, next_group) { |
| 1005 | if (list->group == parent) { |
| 1006 | ret = -EEXIST; |
| 1007 | goto out; |
| 1008 | } |
| 1009 | } |
| 1010 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1011 | ret = add_qgroup_relation_item(trans, quota_root, src, dst); |
| 1012 | if (ret) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1013 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1014 | |
| 1015 | ret = add_qgroup_relation_item(trans, quota_root, dst, src); |
| 1016 | if (ret) { |
| 1017 | del_qgroup_relation_item(trans, quota_root, src, dst); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1018 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1019 | } |
| 1020 | |
| 1021 | spin_lock(&fs_info->qgroup_lock); |
| 1022 | ret = add_relation_rb(quota_root->fs_info, src, dst); |
| 1023 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1024 | out: |
| 1025 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1026 | return ret; |
| 1027 | } |
| 1028 | |
| 1029 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, |
| 1030 | struct btrfs_fs_info *fs_info, u64 src, u64 dst) |
| 1031 | { |
| 1032 | struct btrfs_root *quota_root; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1033 | struct btrfs_qgroup *parent; |
| 1034 | struct btrfs_qgroup *member; |
| 1035 | struct btrfs_qgroup_list *list; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1036 | int ret = 0; |
| 1037 | int err; |
| 1038 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1039 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1040 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1041 | if (!quota_root) { |
| 1042 | ret = -EINVAL; |
| 1043 | goto out; |
| 1044 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1045 | |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1046 | member = find_qgroup_rb(fs_info, src); |
| 1047 | parent = find_qgroup_rb(fs_info, dst); |
| 1048 | if (!member || !parent) { |
| 1049 | ret = -EINVAL; |
| 1050 | goto out; |
| 1051 | } |
| 1052 | |
| 1053 | /* check if such qgroup relation exist firstly */ |
| 1054 | list_for_each_entry(list, &member->groups, next_group) { |
| 1055 | if (list->group == parent) |
| 1056 | goto exist; |
| 1057 | } |
| 1058 | ret = -ENOENT; |
| 1059 | goto out; |
| 1060 | exist: |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1061 | ret = del_qgroup_relation_item(trans, quota_root, src, dst); |
| 1062 | err = del_qgroup_relation_item(trans, quota_root, dst, src); |
| 1063 | if (err && !ret) |
| 1064 | ret = err; |
| 1065 | |
| 1066 | spin_lock(&fs_info->qgroup_lock); |
| 1067 | del_relation_rb(fs_info, src, dst); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1068 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1069 | out: |
| 1070 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1071 | return ret; |
| 1072 | } |
| 1073 | |
| 1074 | int btrfs_create_qgroup(struct btrfs_trans_handle *trans, |
| 1075 | struct btrfs_fs_info *fs_info, u64 qgroupid, char *name) |
| 1076 | { |
| 1077 | struct btrfs_root *quota_root; |
| 1078 | struct btrfs_qgroup *qgroup; |
| 1079 | int ret = 0; |
| 1080 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1081 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1082 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1083 | if (!quota_root) { |
| 1084 | ret = -EINVAL; |
| 1085 | goto out; |
| 1086 | } |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1087 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 1088 | if (qgroup) { |
| 1089 | ret = -EEXIST; |
| 1090 | goto out; |
| 1091 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1092 | |
| 1093 | ret = add_qgroup_item(trans, quota_root, qgroupid); |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1094 | if (ret) |
| 1095 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1096 | |
| 1097 | spin_lock(&fs_info->qgroup_lock); |
| 1098 | qgroup = add_qgroup_rb(fs_info, qgroupid); |
| 1099 | spin_unlock(&fs_info->qgroup_lock); |
| 1100 | |
| 1101 | if (IS_ERR(qgroup)) |
| 1102 | ret = PTR_ERR(qgroup); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1103 | out: |
| 1104 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1105 | return ret; |
| 1106 | } |
| 1107 | |
| 1108 | int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, |
| 1109 | struct btrfs_fs_info *fs_info, u64 qgroupid) |
| 1110 | { |
| 1111 | struct btrfs_root *quota_root; |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1112 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1113 | int ret = 0; |
| 1114 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1115 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1116 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1117 | if (!quota_root) { |
| 1118 | ret = -EINVAL; |
| 1119 | goto out; |
| 1120 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1121 | |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1122 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1123 | if (!qgroup) { |
| 1124 | ret = -ENOENT; |
| 1125 | goto out; |
| 1126 | } else { |
| 1127 | /* check if there are no relations to this qgroup */ |
| 1128 | if (!list_empty(&qgroup->groups) || |
| 1129 | !list_empty(&qgroup->members)) { |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1130 | ret = -EBUSY; |
| 1131 | goto out; |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1132 | } |
| 1133 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1134 | ret = del_qgroup_item(trans, quota_root, qgroupid); |
| 1135 | |
| 1136 | spin_lock(&fs_info->qgroup_lock); |
| 1137 | del_qgroup_rb(quota_root->fs_info, qgroupid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1138 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1139 | out: |
| 1140 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1141 | return ret; |
| 1142 | } |
| 1143 | |
| 1144 | int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, |
| 1145 | struct btrfs_fs_info *fs_info, u64 qgroupid, |
| 1146 | struct btrfs_qgroup_limit *limit) |
| 1147 | { |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1148 | struct btrfs_root *quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1149 | struct btrfs_qgroup *qgroup; |
| 1150 | int ret = 0; |
| 1151 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1152 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
| 1153 | quota_root = fs_info->quota_root; |
| 1154 | if (!quota_root) { |
| 1155 | ret = -EINVAL; |
| 1156 | goto out; |
| 1157 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1158 | |
Wang Shilong | ddb47af | 2013-04-07 10:50:20 +0000 | [diff] [blame] | 1159 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 1160 | if (!qgroup) { |
| 1161 | ret = -ENOENT; |
| 1162 | goto out; |
| 1163 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1164 | ret = update_qgroup_limit_item(trans, quota_root, qgroupid, |
| 1165 | limit->flags, limit->max_rfer, |
| 1166 | limit->max_excl, limit->rsv_rfer, |
| 1167 | limit->rsv_excl); |
| 1168 | if (ret) { |
| 1169 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1170 | printk(KERN_INFO "unable to update quota limit for %llu\n", |
| 1171 | (unsigned long long)qgroupid); |
| 1172 | } |
| 1173 | |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 1174 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1175 | qgroup->lim_flags = limit->flags; |
| 1176 | qgroup->max_rfer = limit->max_rfer; |
| 1177 | qgroup->max_excl = limit->max_excl; |
| 1178 | qgroup->rsv_rfer = limit->rsv_rfer; |
| 1179 | qgroup->rsv_excl = limit->rsv_excl; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1180 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1181 | out: |
| 1182 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1183 | return ret; |
| 1184 | } |
| 1185 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1186 | /* |
| 1187 | * btrfs_qgroup_record_ref is called when the ref is added or deleted. it puts |
| 1188 | * the modification into a list that's later used by btrfs_end_transaction to |
| 1189 | * pass the recorded modifications on to btrfs_qgroup_account_ref. |
| 1190 | */ |
| 1191 | int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, |
| 1192 | struct btrfs_delayed_ref_node *node, |
| 1193 | struct btrfs_delayed_extent_op *extent_op) |
| 1194 | { |
| 1195 | struct qgroup_update *u; |
| 1196 | |
| 1197 | BUG_ON(!trans->delayed_ref_elem.seq); |
| 1198 | u = kmalloc(sizeof(*u), GFP_NOFS); |
| 1199 | if (!u) |
| 1200 | return -ENOMEM; |
| 1201 | |
| 1202 | u->node = node; |
| 1203 | u->extent_op = extent_op; |
| 1204 | list_add_tail(&u->list, &trans->qgroup_ref_list); |
| 1205 | |
| 1206 | return 0; |
| 1207 | } |
| 1208 | |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1209 | static int qgroup_account_ref_step1(struct btrfs_fs_info *fs_info, |
| 1210 | struct ulist *roots, struct ulist *tmp, |
| 1211 | u64 seq) |
| 1212 | { |
| 1213 | struct ulist_node *unode; |
| 1214 | struct ulist_iterator uiter; |
| 1215 | struct ulist_node *tmp_unode; |
| 1216 | struct ulist_iterator tmp_uiter; |
| 1217 | struct btrfs_qgroup *qg; |
| 1218 | int ret; |
| 1219 | |
| 1220 | ULIST_ITER_INIT(&uiter); |
| 1221 | while ((unode = ulist_next(roots, &uiter))) { |
| 1222 | qg = find_qgroup_rb(fs_info, unode->val); |
| 1223 | if (!qg) |
| 1224 | continue; |
| 1225 | |
| 1226 | ulist_reinit(tmp); |
| 1227 | /* XXX id not needed */ |
| 1228 | ret = ulist_add(tmp, qg->qgroupid, |
| 1229 | (u64)(uintptr_t)qg, GFP_ATOMIC); |
| 1230 | if (ret < 0) |
| 1231 | return ret; |
| 1232 | ULIST_ITER_INIT(&tmp_uiter); |
| 1233 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { |
| 1234 | struct btrfs_qgroup_list *glist; |
| 1235 | |
| 1236 | qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; |
| 1237 | if (qg->refcnt < seq) |
| 1238 | qg->refcnt = seq + 1; |
| 1239 | else |
| 1240 | ++qg->refcnt; |
| 1241 | |
| 1242 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1243 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1244 | (u64)(uintptr_t)glist->group, |
| 1245 | GFP_ATOMIC); |
| 1246 | if (ret < 0) |
| 1247 | return ret; |
| 1248 | } |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | return 0; |
| 1253 | } |
| 1254 | |
| 1255 | static int qgroup_account_ref_step2(struct btrfs_fs_info *fs_info, |
| 1256 | struct ulist *roots, struct ulist *tmp, |
| 1257 | u64 seq, int sgn, u64 num_bytes, |
| 1258 | struct btrfs_qgroup *qgroup) |
| 1259 | { |
| 1260 | struct ulist_node *unode; |
| 1261 | struct ulist_iterator uiter; |
| 1262 | struct btrfs_qgroup *qg; |
| 1263 | struct btrfs_qgroup_list *glist; |
| 1264 | int ret; |
| 1265 | |
| 1266 | ulist_reinit(tmp); |
| 1267 | ret = ulist_add(tmp, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC); |
| 1268 | if (ret < 0) |
| 1269 | return ret; |
| 1270 | |
| 1271 | ULIST_ITER_INIT(&uiter); |
| 1272 | while ((unode = ulist_next(tmp, &uiter))) { |
| 1273 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
| 1274 | if (qg->refcnt < seq) { |
| 1275 | /* not visited by step 1 */ |
| 1276 | qg->rfer += sgn * num_bytes; |
| 1277 | qg->rfer_cmpr += sgn * num_bytes; |
| 1278 | if (roots->nnodes == 0) { |
| 1279 | qg->excl += sgn * num_bytes; |
| 1280 | qg->excl_cmpr += sgn * num_bytes; |
| 1281 | } |
| 1282 | qgroup_dirty(fs_info, qg); |
| 1283 | } |
| 1284 | WARN_ON(qg->tag >= seq); |
| 1285 | qg->tag = seq; |
| 1286 | |
| 1287 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1288 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1289 | (uintptr_t)glist->group, GFP_ATOMIC); |
| 1290 | if (ret < 0) |
| 1291 | return ret; |
| 1292 | } |
| 1293 | } |
| 1294 | |
| 1295 | return 0; |
| 1296 | } |
| 1297 | |
| 1298 | static int qgroup_account_ref_step3(struct btrfs_fs_info *fs_info, |
| 1299 | struct ulist *roots, struct ulist *tmp, |
| 1300 | u64 seq, int sgn, u64 num_bytes) |
| 1301 | { |
| 1302 | struct ulist_node *unode; |
| 1303 | struct ulist_iterator uiter; |
| 1304 | struct btrfs_qgroup *qg; |
| 1305 | struct ulist_node *tmp_unode; |
| 1306 | struct ulist_iterator tmp_uiter; |
| 1307 | int ret; |
| 1308 | |
| 1309 | ULIST_ITER_INIT(&uiter); |
| 1310 | while ((unode = ulist_next(roots, &uiter))) { |
| 1311 | qg = find_qgroup_rb(fs_info, unode->val); |
| 1312 | if (!qg) |
| 1313 | continue; |
| 1314 | |
| 1315 | ulist_reinit(tmp); |
| 1316 | ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, GFP_ATOMIC); |
| 1317 | if (ret < 0) |
| 1318 | return ret; |
| 1319 | |
| 1320 | ULIST_ITER_INIT(&tmp_uiter); |
| 1321 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { |
| 1322 | struct btrfs_qgroup_list *glist; |
| 1323 | |
| 1324 | qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; |
| 1325 | if (qg->tag == seq) |
| 1326 | continue; |
| 1327 | |
| 1328 | if (qg->refcnt - seq == roots->nnodes) { |
| 1329 | qg->excl -= sgn * num_bytes; |
| 1330 | qg->excl_cmpr -= sgn * num_bytes; |
| 1331 | qgroup_dirty(fs_info, qg); |
| 1332 | } |
| 1333 | |
| 1334 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1335 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1336 | (uintptr_t)glist->group, |
| 1337 | GFP_ATOMIC); |
| 1338 | if (ret < 0) |
| 1339 | return ret; |
| 1340 | } |
| 1341 | } |
| 1342 | } |
| 1343 | |
| 1344 | return 0; |
| 1345 | } |
| 1346 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1347 | /* |
| 1348 | * btrfs_qgroup_account_ref is called for every ref that is added to or deleted |
| 1349 | * from the fs. First, all roots referencing the extent are searched, and |
| 1350 | * then the space is accounted accordingly to the different roots. The |
| 1351 | * accounting algorithm works in 3 steps documented inline. |
| 1352 | */ |
| 1353 | int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, |
| 1354 | struct btrfs_fs_info *fs_info, |
| 1355 | struct btrfs_delayed_ref_node *node, |
| 1356 | struct btrfs_delayed_extent_op *extent_op) |
| 1357 | { |
| 1358 | struct btrfs_key ins; |
| 1359 | struct btrfs_root *quota_root; |
| 1360 | u64 ref_root; |
| 1361 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1362 | struct ulist *roots = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1363 | u64 seq; |
| 1364 | int ret = 0; |
| 1365 | int sgn; |
| 1366 | |
| 1367 | if (!fs_info->quota_enabled) |
| 1368 | return 0; |
| 1369 | |
| 1370 | BUG_ON(!fs_info->quota_root); |
| 1371 | |
| 1372 | ins.objectid = node->bytenr; |
| 1373 | ins.offset = node->num_bytes; |
| 1374 | ins.type = BTRFS_EXTENT_ITEM_KEY; |
| 1375 | |
| 1376 | if (node->type == BTRFS_TREE_BLOCK_REF_KEY || |
| 1377 | node->type == BTRFS_SHARED_BLOCK_REF_KEY) { |
| 1378 | struct btrfs_delayed_tree_ref *ref; |
| 1379 | ref = btrfs_delayed_node_to_tree_ref(node); |
| 1380 | ref_root = ref->root; |
| 1381 | } else if (node->type == BTRFS_EXTENT_DATA_REF_KEY || |
| 1382 | node->type == BTRFS_SHARED_DATA_REF_KEY) { |
| 1383 | struct btrfs_delayed_data_ref *ref; |
| 1384 | ref = btrfs_delayed_node_to_data_ref(node); |
| 1385 | ref_root = ref->root; |
| 1386 | } else { |
| 1387 | BUG(); |
| 1388 | } |
| 1389 | |
| 1390 | if (!is_fstree(ref_root)) { |
| 1391 | /* |
| 1392 | * non-fs-trees are not being accounted |
| 1393 | */ |
| 1394 | return 0; |
| 1395 | } |
| 1396 | |
| 1397 | switch (node->action) { |
| 1398 | case BTRFS_ADD_DELAYED_REF: |
| 1399 | case BTRFS_ADD_DELAYED_EXTENT: |
| 1400 | sgn = 1; |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1401 | seq = btrfs_tree_mod_seq_prev(node->seq); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1402 | break; |
| 1403 | case BTRFS_DROP_DELAYED_REF: |
| 1404 | sgn = -1; |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1405 | seq = node->seq; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1406 | break; |
| 1407 | case BTRFS_UPDATE_DELAYED_HEAD: |
| 1408 | return 0; |
| 1409 | default: |
| 1410 | BUG(); |
| 1411 | } |
| 1412 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1413 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 1414 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { |
| 1415 | if (fs_info->qgroup_rescan_progress.objectid <= node->bytenr) { |
| 1416 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1417 | return 0; |
| 1418 | } |
| 1419 | } |
| 1420 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1421 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1422 | /* |
| 1423 | * the delayed ref sequence number we pass depends on the direction of |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1424 | * the operation. for add operations, we pass |
| 1425 | * tree_mod_log_prev_seq(node->seq) to skip |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1426 | * the delayed ref's current sequence number, because we need the state |
| 1427 | * of the tree before the add operation. for delete operations, we pass |
| 1428 | * (node->seq) to include the delayed ref's current sequence number, |
| 1429 | * because we need the state of the tree after the delete operation. |
| 1430 | */ |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1431 | ret = btrfs_find_all_roots(trans, fs_info, node->bytenr, seq, &roots); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1432 | if (ret < 0) |
Wang Shilong | a797502 | 2013-03-25 11:08:23 +0000 | [diff] [blame] | 1433 | return ret; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1434 | |
| 1435 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1436 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1437 | quota_root = fs_info->quota_root; |
| 1438 | if (!quota_root) |
| 1439 | goto unlock; |
| 1440 | |
| 1441 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1442 | if (!qgroup) |
| 1443 | goto unlock; |
| 1444 | |
| 1445 | /* |
| 1446 | * step 1: for each old ref, visit all nodes once and inc refcnt |
| 1447 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1448 | ulist_reinit(fs_info->qgroup_ulist); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1449 | seq = fs_info->qgroup_seq; |
| 1450 | fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ |
| 1451 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1452 | ret = qgroup_account_ref_step1(fs_info, roots, fs_info->qgroup_ulist, |
| 1453 | seq); |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1454 | if (ret) |
| 1455 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1456 | |
| 1457 | /* |
| 1458 | * step 2: walk from the new root |
| 1459 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1460 | ret = qgroup_account_ref_step2(fs_info, roots, fs_info->qgroup_ulist, |
| 1461 | seq, sgn, node->num_bytes, qgroup); |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1462 | if (ret) |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1463 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1464 | |
| 1465 | /* |
| 1466 | * step 3: walk again from old refs |
| 1467 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1468 | ret = qgroup_account_ref_step3(fs_info, roots, fs_info->qgroup_ulist, |
| 1469 | seq, sgn, node->num_bytes); |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1470 | if (ret) |
| 1471 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1472 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1473 | unlock: |
| 1474 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1475 | ulist_free(roots); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1476 | |
| 1477 | return ret; |
| 1478 | } |
| 1479 | |
| 1480 | /* |
| 1481 | * called from commit_transaction. Writes all changed qgroups to disk. |
| 1482 | */ |
| 1483 | int btrfs_run_qgroups(struct btrfs_trans_handle *trans, |
| 1484 | struct btrfs_fs_info *fs_info) |
| 1485 | { |
| 1486 | struct btrfs_root *quota_root = fs_info->quota_root; |
| 1487 | int ret = 0; |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1488 | int start_rescan_worker = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1489 | |
| 1490 | if (!quota_root) |
| 1491 | goto out; |
| 1492 | |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1493 | if (!fs_info->quota_enabled && fs_info->pending_quota_state) |
| 1494 | start_rescan_worker = 1; |
| 1495 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1496 | fs_info->quota_enabled = fs_info->pending_quota_state; |
| 1497 | |
| 1498 | spin_lock(&fs_info->qgroup_lock); |
| 1499 | while (!list_empty(&fs_info->dirty_qgroups)) { |
| 1500 | struct btrfs_qgroup *qgroup; |
| 1501 | qgroup = list_first_entry(&fs_info->dirty_qgroups, |
| 1502 | struct btrfs_qgroup, dirty); |
| 1503 | list_del_init(&qgroup->dirty); |
| 1504 | spin_unlock(&fs_info->qgroup_lock); |
| 1505 | ret = update_qgroup_info_item(trans, quota_root, qgroup); |
| 1506 | if (ret) |
| 1507 | fs_info->qgroup_flags |= |
| 1508 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1509 | spin_lock(&fs_info->qgroup_lock); |
| 1510 | } |
| 1511 | if (fs_info->quota_enabled) |
| 1512 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON; |
| 1513 | else |
| 1514 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON; |
| 1515 | spin_unlock(&fs_info->qgroup_lock); |
| 1516 | |
| 1517 | ret = update_qgroup_status_item(trans, fs_info, quota_root); |
| 1518 | if (ret) |
| 1519 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1520 | |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1521 | if (!ret && start_rescan_worker) { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 1522 | ret = qgroup_rescan_init(fs_info, 0, 1); |
| 1523 | if (!ret) { |
| 1524 | qgroup_rescan_zero_tracking(fs_info); |
| 1525 | btrfs_queue_worker(&fs_info->qgroup_rescan_workers, |
| 1526 | &fs_info->qgroup_rescan_work); |
| 1527 | } |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1528 | ret = 0; |
| 1529 | } |
| 1530 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1531 | out: |
| 1532 | |
| 1533 | return ret; |
| 1534 | } |
| 1535 | |
| 1536 | /* |
| 1537 | * copy the acounting information between qgroups. This is necessary when a |
| 1538 | * snapshot or a subvolume is created |
| 1539 | */ |
| 1540 | int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, |
| 1541 | struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, |
| 1542 | struct btrfs_qgroup_inherit *inherit) |
| 1543 | { |
| 1544 | int ret = 0; |
| 1545 | int i; |
| 1546 | u64 *i_qgroups; |
| 1547 | struct btrfs_root *quota_root = fs_info->quota_root; |
| 1548 | struct btrfs_qgroup *srcgroup; |
| 1549 | struct btrfs_qgroup *dstgroup; |
| 1550 | u32 level_size = 0; |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 1551 | u64 nums; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1552 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1553 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1554 | if (!fs_info->quota_enabled) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1555 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1556 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1557 | if (!quota_root) { |
| 1558 | ret = -EINVAL; |
| 1559 | goto out; |
| 1560 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1561 | |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 1562 | if (inherit) { |
| 1563 | i_qgroups = (u64 *)(inherit + 1); |
| 1564 | nums = inherit->num_qgroups + 2 * inherit->num_ref_copies + |
| 1565 | 2 * inherit->num_excl_copies; |
| 1566 | for (i = 0; i < nums; ++i) { |
| 1567 | srcgroup = find_qgroup_rb(fs_info, *i_qgroups); |
| 1568 | if (!srcgroup) { |
| 1569 | ret = -EINVAL; |
| 1570 | goto out; |
| 1571 | } |
| 1572 | ++i_qgroups; |
| 1573 | } |
| 1574 | } |
| 1575 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1576 | /* |
| 1577 | * create a tracking group for the subvol itself |
| 1578 | */ |
| 1579 | ret = add_qgroup_item(trans, quota_root, objectid); |
| 1580 | if (ret) |
| 1581 | goto out; |
| 1582 | |
| 1583 | if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) { |
| 1584 | ret = update_qgroup_limit_item(trans, quota_root, objectid, |
| 1585 | inherit->lim.flags, |
| 1586 | inherit->lim.max_rfer, |
| 1587 | inherit->lim.max_excl, |
| 1588 | inherit->lim.rsv_rfer, |
| 1589 | inherit->lim.rsv_excl); |
| 1590 | if (ret) |
| 1591 | goto out; |
| 1592 | } |
| 1593 | |
| 1594 | if (srcid) { |
| 1595 | struct btrfs_root *srcroot; |
| 1596 | struct btrfs_key srckey; |
| 1597 | int srcroot_level; |
| 1598 | |
| 1599 | srckey.objectid = srcid; |
| 1600 | srckey.type = BTRFS_ROOT_ITEM_KEY; |
| 1601 | srckey.offset = (u64)-1; |
| 1602 | srcroot = btrfs_read_fs_root_no_name(fs_info, &srckey); |
| 1603 | if (IS_ERR(srcroot)) { |
| 1604 | ret = PTR_ERR(srcroot); |
| 1605 | goto out; |
| 1606 | } |
| 1607 | |
| 1608 | rcu_read_lock(); |
| 1609 | srcroot_level = btrfs_header_level(srcroot->node); |
| 1610 | level_size = btrfs_level_size(srcroot, srcroot_level); |
| 1611 | rcu_read_unlock(); |
| 1612 | } |
| 1613 | |
| 1614 | /* |
| 1615 | * add qgroup to all inherited groups |
| 1616 | */ |
| 1617 | if (inherit) { |
| 1618 | i_qgroups = (u64 *)(inherit + 1); |
| 1619 | for (i = 0; i < inherit->num_qgroups; ++i) { |
| 1620 | ret = add_qgroup_relation_item(trans, quota_root, |
| 1621 | objectid, *i_qgroups); |
| 1622 | if (ret) |
| 1623 | goto out; |
| 1624 | ret = add_qgroup_relation_item(trans, quota_root, |
| 1625 | *i_qgroups, objectid); |
| 1626 | if (ret) |
| 1627 | goto out; |
| 1628 | ++i_qgroups; |
| 1629 | } |
| 1630 | } |
| 1631 | |
| 1632 | |
| 1633 | spin_lock(&fs_info->qgroup_lock); |
| 1634 | |
| 1635 | dstgroup = add_qgroup_rb(fs_info, objectid); |
Dan Carpenter | 57a5a88 | 2012-07-30 02:15:43 -0600 | [diff] [blame] | 1636 | if (IS_ERR(dstgroup)) { |
| 1637 | ret = PTR_ERR(dstgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1638 | goto unlock; |
Dan Carpenter | 57a5a88 | 2012-07-30 02:15:43 -0600 | [diff] [blame] | 1639 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1640 | |
| 1641 | if (srcid) { |
| 1642 | srcgroup = find_qgroup_rb(fs_info, srcid); |
Chris Mason | f3a87f1 | 2012-09-14 20:06:30 -0400 | [diff] [blame] | 1643 | if (!srcgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1644 | goto unlock; |
| 1645 | dstgroup->rfer = srcgroup->rfer - level_size; |
| 1646 | dstgroup->rfer_cmpr = srcgroup->rfer_cmpr - level_size; |
| 1647 | srcgroup->excl = level_size; |
| 1648 | srcgroup->excl_cmpr = level_size; |
| 1649 | qgroup_dirty(fs_info, dstgroup); |
| 1650 | qgroup_dirty(fs_info, srcgroup); |
| 1651 | } |
| 1652 | |
Chris Mason | f3a87f1 | 2012-09-14 20:06:30 -0400 | [diff] [blame] | 1653 | if (!inherit) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1654 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1655 | |
| 1656 | i_qgroups = (u64 *)(inherit + 1); |
| 1657 | for (i = 0; i < inherit->num_qgroups; ++i) { |
| 1658 | ret = add_relation_rb(quota_root->fs_info, objectid, |
| 1659 | *i_qgroups); |
| 1660 | if (ret) |
| 1661 | goto unlock; |
| 1662 | ++i_qgroups; |
| 1663 | } |
| 1664 | |
| 1665 | for (i = 0; i < inherit->num_ref_copies; ++i) { |
| 1666 | struct btrfs_qgroup *src; |
| 1667 | struct btrfs_qgroup *dst; |
| 1668 | |
| 1669 | src = find_qgroup_rb(fs_info, i_qgroups[0]); |
| 1670 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); |
| 1671 | |
| 1672 | if (!src || !dst) { |
| 1673 | ret = -EINVAL; |
| 1674 | goto unlock; |
| 1675 | } |
| 1676 | |
| 1677 | dst->rfer = src->rfer - level_size; |
| 1678 | dst->rfer_cmpr = src->rfer_cmpr - level_size; |
| 1679 | i_qgroups += 2; |
| 1680 | } |
| 1681 | for (i = 0; i < inherit->num_excl_copies; ++i) { |
| 1682 | struct btrfs_qgroup *src; |
| 1683 | struct btrfs_qgroup *dst; |
| 1684 | |
| 1685 | src = find_qgroup_rb(fs_info, i_qgroups[0]); |
| 1686 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); |
| 1687 | |
| 1688 | if (!src || !dst) { |
| 1689 | ret = -EINVAL; |
| 1690 | goto unlock; |
| 1691 | } |
| 1692 | |
| 1693 | dst->excl = src->excl + level_size; |
| 1694 | dst->excl_cmpr = src->excl_cmpr + level_size; |
| 1695 | i_qgroups += 2; |
| 1696 | } |
| 1697 | |
| 1698 | unlock: |
| 1699 | spin_unlock(&fs_info->qgroup_lock); |
| 1700 | out: |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1701 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1702 | return ret; |
| 1703 | } |
| 1704 | |
| 1705 | /* |
| 1706 | * reserve some space for a qgroup and all its parents. The reservation takes |
| 1707 | * place with start_transaction or dealloc_reserve, similar to ENOSPC |
| 1708 | * accounting. If not enough space is available, EDQUOT is returned. |
| 1709 | * We assume that the requested space is new for all qgroups. |
| 1710 | */ |
| 1711 | int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes) |
| 1712 | { |
| 1713 | struct btrfs_root *quota_root; |
| 1714 | struct btrfs_qgroup *qgroup; |
| 1715 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 1716 | u64 ref_root = root->root_key.objectid; |
| 1717 | int ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1718 | struct ulist_node *unode; |
| 1719 | struct ulist_iterator uiter; |
| 1720 | |
| 1721 | if (!is_fstree(ref_root)) |
| 1722 | return 0; |
| 1723 | |
| 1724 | if (num_bytes == 0) |
| 1725 | return 0; |
| 1726 | |
| 1727 | spin_lock(&fs_info->qgroup_lock); |
| 1728 | quota_root = fs_info->quota_root; |
| 1729 | if (!quota_root) |
| 1730 | goto out; |
| 1731 | |
| 1732 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1733 | if (!qgroup) |
| 1734 | goto out; |
| 1735 | |
| 1736 | /* |
| 1737 | * in a first step, we check all affected qgroups if any limits would |
| 1738 | * be exceeded |
| 1739 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1740 | ulist_reinit(fs_info->qgroup_ulist); |
| 1741 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1742 | (uintptr_t)qgroup, GFP_ATOMIC); |
| 1743 | if (ret < 0) |
| 1744 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1745 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1746 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1747 | struct btrfs_qgroup *qg; |
| 1748 | struct btrfs_qgroup_list *glist; |
| 1749 | |
Jan Schmidt | 995e01b | 2012-08-13 02:52:38 -0600 | [diff] [blame] | 1750 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1751 | |
| 1752 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) && |
Wang Shilong | b4fcd6b | 2013-04-15 12:56:49 +0000 | [diff] [blame] | 1753 | qg->reserved + (s64)qg->rfer + num_bytes > |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1754 | qg->max_rfer) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1755 | ret = -EDQUOT; |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1756 | goto out; |
| 1757 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1758 | |
| 1759 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) && |
Wang Shilong | b4fcd6b | 2013-04-15 12:56:49 +0000 | [diff] [blame] | 1760 | qg->reserved + (s64)qg->excl + num_bytes > |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1761 | qg->max_excl) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1762 | ret = -EDQUOT; |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1763 | goto out; |
| 1764 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1765 | |
| 1766 | list_for_each_entry(glist, &qg->groups, next_group) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1767 | ret = ulist_add(fs_info->qgroup_ulist, |
| 1768 | glist->group->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1769 | (uintptr_t)glist->group, GFP_ATOMIC); |
| 1770 | if (ret < 0) |
| 1771 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1772 | } |
| 1773 | } |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1774 | ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1775 | /* |
| 1776 | * no limits exceeded, now record the reservation into all qgroups |
| 1777 | */ |
| 1778 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1779 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1780 | struct btrfs_qgroup *qg; |
| 1781 | |
Jan Schmidt | 995e01b | 2012-08-13 02:52:38 -0600 | [diff] [blame] | 1782 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1783 | |
| 1784 | qg->reserved += num_bytes; |
| 1785 | } |
| 1786 | |
| 1787 | out: |
| 1788 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1789 | return ret; |
| 1790 | } |
| 1791 | |
| 1792 | void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes) |
| 1793 | { |
| 1794 | struct btrfs_root *quota_root; |
| 1795 | struct btrfs_qgroup *qgroup; |
| 1796 | struct btrfs_fs_info *fs_info = root->fs_info; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1797 | struct ulist_node *unode; |
| 1798 | struct ulist_iterator uiter; |
| 1799 | u64 ref_root = root->root_key.objectid; |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1800 | int ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1801 | |
| 1802 | if (!is_fstree(ref_root)) |
| 1803 | return; |
| 1804 | |
| 1805 | if (num_bytes == 0) |
| 1806 | return; |
| 1807 | |
| 1808 | spin_lock(&fs_info->qgroup_lock); |
| 1809 | |
| 1810 | quota_root = fs_info->quota_root; |
| 1811 | if (!quota_root) |
| 1812 | goto out; |
| 1813 | |
| 1814 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1815 | if (!qgroup) |
| 1816 | goto out; |
| 1817 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1818 | ulist_reinit(fs_info->qgroup_ulist); |
| 1819 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1820 | (uintptr_t)qgroup, GFP_ATOMIC); |
| 1821 | if (ret < 0) |
| 1822 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1823 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1824 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1825 | struct btrfs_qgroup *qg; |
| 1826 | struct btrfs_qgroup_list *glist; |
| 1827 | |
Jan Schmidt | 995e01b | 2012-08-13 02:52:38 -0600 | [diff] [blame] | 1828 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1829 | |
| 1830 | qg->reserved -= num_bytes; |
| 1831 | |
| 1832 | list_for_each_entry(glist, &qg->groups, next_group) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1833 | ret = ulist_add(fs_info->qgroup_ulist, |
| 1834 | glist->group->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1835 | (uintptr_t)glist->group, GFP_ATOMIC); |
| 1836 | if (ret < 0) |
| 1837 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1838 | } |
| 1839 | } |
| 1840 | |
| 1841 | out: |
| 1842 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1843 | } |
| 1844 | |
| 1845 | void assert_qgroups_uptodate(struct btrfs_trans_handle *trans) |
| 1846 | { |
| 1847 | if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq) |
| 1848 | return; |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1849 | pr_err("btrfs: qgroups not uptodate in trans handle %p: list is%s empty, seq is %#x.%x\n", |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1850 | trans, list_empty(&trans->qgroup_ref_list) ? "" : " not", |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1851 | (u32)(trans->delayed_ref_elem.seq >> 32), |
| 1852 | (u32)trans->delayed_ref_elem.seq); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1853 | BUG(); |
| 1854 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1855 | |
| 1856 | /* |
| 1857 | * returns < 0 on error, 0 when more leafs are to be scanned. |
| 1858 | * returns 1 when done, 2 when done and FLAG_INCONSISTENT was cleared. |
| 1859 | */ |
| 1860 | static int |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 1861 | qgroup_rescan_leaf(struct btrfs_fs_info *fs_info, struct btrfs_path *path, |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1862 | struct btrfs_trans_handle *trans, struct ulist *tmp, |
| 1863 | struct extent_buffer *scratch_leaf) |
| 1864 | { |
| 1865 | struct btrfs_key found; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1866 | struct ulist *roots = NULL; |
| 1867 | struct ulist_node *unode; |
| 1868 | struct ulist_iterator uiter; |
| 1869 | struct seq_list tree_mod_seq_elem = {}; |
| 1870 | u64 seq; |
| 1871 | int slot; |
| 1872 | int ret; |
| 1873 | |
| 1874 | path->leave_spinning = 1; |
| 1875 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 1876 | ret = btrfs_search_slot_for_read(fs_info->extent_root, |
| 1877 | &fs_info->qgroup_rescan_progress, |
| 1878 | path, 1, 0); |
| 1879 | |
| 1880 | pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n", |
| 1881 | (unsigned long long)fs_info->qgroup_rescan_progress.objectid, |
| 1882 | fs_info->qgroup_rescan_progress.type, |
| 1883 | (unsigned long long)fs_info->qgroup_rescan_progress.offset, |
| 1884 | ret); |
| 1885 | |
| 1886 | if (ret) { |
| 1887 | /* |
| 1888 | * The rescan is about to end, we will not be scanning any |
| 1889 | * further blocks. We cannot unset the RESCAN flag here, because |
| 1890 | * we want to commit the transaction if everything went well. |
| 1891 | * To make the live accounting work in this phase, we set our |
| 1892 | * scan progress pointer such that every real extent objectid |
| 1893 | * will be smaller. |
| 1894 | */ |
| 1895 | fs_info->qgroup_rescan_progress.objectid = (u64)-1; |
| 1896 | btrfs_release_path(path); |
| 1897 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1898 | return ret; |
| 1899 | } |
| 1900 | |
| 1901 | btrfs_item_key_to_cpu(path->nodes[0], &found, |
| 1902 | btrfs_header_nritems(path->nodes[0]) - 1); |
| 1903 | fs_info->qgroup_rescan_progress.objectid = found.objectid + 1; |
| 1904 | |
| 1905 | btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem); |
| 1906 | memcpy(scratch_leaf, path->nodes[0], sizeof(*scratch_leaf)); |
| 1907 | slot = path->slots[0]; |
| 1908 | btrfs_release_path(path); |
| 1909 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1910 | |
| 1911 | for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) { |
| 1912 | btrfs_item_key_to_cpu(scratch_leaf, &found, slot); |
| 1913 | if (found.type != BTRFS_EXTENT_ITEM_KEY) |
| 1914 | continue; |
| 1915 | ret = btrfs_find_all_roots(trans, fs_info, found.objectid, |
| 1916 | tree_mod_seq_elem.seq, &roots); |
| 1917 | if (ret < 0) |
| 1918 | goto out; |
| 1919 | spin_lock(&fs_info->qgroup_lock); |
| 1920 | seq = fs_info->qgroup_seq; |
| 1921 | fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ |
| 1922 | |
| 1923 | ret = qgroup_account_ref_step1(fs_info, roots, tmp, seq); |
| 1924 | if (ret) { |
| 1925 | spin_unlock(&fs_info->qgroup_lock); |
| 1926 | ulist_free(roots); |
| 1927 | goto out; |
| 1928 | } |
| 1929 | |
| 1930 | /* |
| 1931 | * step2 of btrfs_qgroup_account_ref works from a single root, |
| 1932 | * we're doing all at once here. |
| 1933 | */ |
| 1934 | ulist_reinit(tmp); |
| 1935 | ULIST_ITER_INIT(&uiter); |
| 1936 | while ((unode = ulist_next(roots, &uiter))) { |
| 1937 | struct btrfs_qgroup *qg; |
| 1938 | |
| 1939 | qg = find_qgroup_rb(fs_info, unode->val); |
| 1940 | if (!qg) |
| 1941 | continue; |
| 1942 | |
| 1943 | ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, |
| 1944 | GFP_ATOMIC); |
| 1945 | if (ret < 0) { |
| 1946 | spin_unlock(&fs_info->qgroup_lock); |
| 1947 | ulist_free(roots); |
| 1948 | goto out; |
| 1949 | } |
| 1950 | } |
| 1951 | |
| 1952 | /* this loop is similar to step 2 of btrfs_qgroup_account_ref */ |
| 1953 | ULIST_ITER_INIT(&uiter); |
| 1954 | while ((unode = ulist_next(tmp, &uiter))) { |
| 1955 | struct btrfs_qgroup *qg; |
| 1956 | struct btrfs_qgroup_list *glist; |
| 1957 | |
| 1958 | qg = (struct btrfs_qgroup *)(uintptr_t) unode->aux; |
| 1959 | qg->rfer += found.offset; |
| 1960 | qg->rfer_cmpr += found.offset; |
| 1961 | WARN_ON(qg->tag >= seq); |
| 1962 | if (qg->refcnt - seq == roots->nnodes) { |
| 1963 | qg->excl += found.offset; |
| 1964 | qg->excl_cmpr += found.offset; |
| 1965 | } |
| 1966 | qgroup_dirty(fs_info, qg); |
| 1967 | |
| 1968 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1969 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1970 | (uintptr_t)glist->group, |
| 1971 | GFP_ATOMIC); |
| 1972 | if (ret < 0) { |
| 1973 | spin_unlock(&fs_info->qgroup_lock); |
| 1974 | ulist_free(roots); |
| 1975 | goto out; |
| 1976 | } |
| 1977 | } |
| 1978 | } |
| 1979 | |
| 1980 | spin_unlock(&fs_info->qgroup_lock); |
| 1981 | ulist_free(roots); |
| 1982 | ret = 0; |
| 1983 | } |
| 1984 | |
| 1985 | out: |
| 1986 | btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem); |
| 1987 | |
| 1988 | return ret; |
| 1989 | } |
| 1990 | |
| 1991 | static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) |
| 1992 | { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 1993 | struct btrfs_fs_info *fs_info = container_of(work, struct btrfs_fs_info, |
| 1994 | qgroup_rescan_work); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1995 | struct btrfs_path *path; |
| 1996 | struct btrfs_trans_handle *trans = NULL; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1997 | struct ulist *tmp = NULL; |
| 1998 | struct extent_buffer *scratch_leaf = NULL; |
| 1999 | int err = -ENOMEM; |
| 2000 | |
| 2001 | path = btrfs_alloc_path(); |
| 2002 | if (!path) |
| 2003 | goto out; |
| 2004 | tmp = ulist_alloc(GFP_NOFS); |
| 2005 | if (!tmp) |
| 2006 | goto out; |
| 2007 | scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS); |
| 2008 | if (!scratch_leaf) |
| 2009 | goto out; |
| 2010 | |
| 2011 | err = 0; |
| 2012 | while (!err) { |
| 2013 | trans = btrfs_start_transaction(fs_info->fs_root, 0); |
| 2014 | if (IS_ERR(trans)) { |
| 2015 | err = PTR_ERR(trans); |
| 2016 | break; |
| 2017 | } |
| 2018 | if (!fs_info->quota_enabled) { |
| 2019 | err = -EINTR; |
| 2020 | } else { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2021 | err = qgroup_rescan_leaf(fs_info, path, trans, |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2022 | tmp, scratch_leaf); |
| 2023 | } |
| 2024 | if (err > 0) |
| 2025 | btrfs_commit_transaction(trans, fs_info->fs_root); |
| 2026 | else |
| 2027 | btrfs_end_transaction(trans, fs_info->fs_root); |
| 2028 | } |
| 2029 | |
| 2030 | out: |
| 2031 | kfree(scratch_leaf); |
| 2032 | ulist_free(tmp); |
| 2033 | btrfs_free_path(path); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2034 | |
| 2035 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2036 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2037 | |
| 2038 | if (err == 2 && |
| 2039 | fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) { |
| 2040 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 2041 | } else if (err < 0) { |
| 2042 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 2043 | } |
| 2044 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2045 | |
| 2046 | if (err >= 0) { |
| 2047 | pr_info("btrfs: qgroup scan completed%s\n", |
| 2048 | err == 2 ? " (inconsistency flag cleared)" : ""); |
| 2049 | } else { |
| 2050 | pr_err("btrfs: qgroup scan failed with %d\n", err); |
| 2051 | } |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 2052 | |
| 2053 | complete_all(&fs_info->qgroup_rescan_completion); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2054 | } |
| 2055 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2056 | /* |
| 2057 | * Checks that (a) no rescan is running and (b) quota is enabled. Allocates all |
| 2058 | * memory required for the rescan context. |
| 2059 | */ |
| 2060 | static int |
| 2061 | qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid, |
| 2062 | int init_flags) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2063 | { |
| 2064 | int ret = 0; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2065 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2066 | if (!init_flags && |
| 2067 | (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) || |
| 2068 | !(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))) { |
| 2069 | ret = -EINVAL; |
| 2070 | goto err; |
| 2071 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2072 | |
| 2073 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2074 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2075 | |
| 2076 | if (init_flags) { |
| 2077 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) |
| 2078 | ret = -EINPROGRESS; |
| 2079 | else if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) |
| 2080 | ret = -EINVAL; |
| 2081 | |
| 2082 | if (ret) { |
| 2083 | spin_unlock(&fs_info->qgroup_lock); |
| 2084 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2085 | goto err; |
| 2086 | } |
| 2087 | |
| 2088 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2089 | } |
| 2090 | |
| 2091 | memset(&fs_info->qgroup_rescan_progress, 0, |
| 2092 | sizeof(fs_info->qgroup_rescan_progress)); |
| 2093 | fs_info->qgroup_rescan_progress.objectid = progress_objectid; |
| 2094 | |
| 2095 | spin_unlock(&fs_info->qgroup_lock); |
| 2096 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2097 | |
| 2098 | init_completion(&fs_info->qgroup_rescan_completion); |
| 2099 | |
| 2100 | memset(&fs_info->qgroup_rescan_work, 0, |
| 2101 | sizeof(fs_info->qgroup_rescan_work)); |
| 2102 | fs_info->qgroup_rescan_work.func = btrfs_qgroup_rescan_worker; |
| 2103 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2104 | if (ret) { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2105 | err: |
| 2106 | pr_info("btrfs: qgroup_rescan_init failed with %d\n", ret); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2107 | return ret; |
| 2108 | } |
| 2109 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2110 | return 0; |
| 2111 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2112 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2113 | static void |
| 2114 | qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info) |
| 2115 | { |
| 2116 | struct rb_node *n; |
| 2117 | struct btrfs_qgroup *qgroup; |
| 2118 | |
| 2119 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2120 | /* clear all current qgroup tracking information */ |
| 2121 | for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) { |
| 2122 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 2123 | qgroup->rfer = 0; |
| 2124 | qgroup->rfer_cmpr = 0; |
| 2125 | qgroup->excl = 0; |
| 2126 | qgroup->excl_cmpr = 0; |
| 2127 | } |
| 2128 | spin_unlock(&fs_info->qgroup_lock); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2129 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2130 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2131 | int |
| 2132 | btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) |
| 2133 | { |
| 2134 | int ret = 0; |
| 2135 | struct btrfs_trans_handle *trans; |
| 2136 | |
| 2137 | ret = qgroup_rescan_init(fs_info, 0, 1); |
| 2138 | if (ret) |
| 2139 | return ret; |
| 2140 | |
| 2141 | /* |
| 2142 | * We have set the rescan_progress to 0, which means no more |
| 2143 | * delayed refs will be accounted by btrfs_qgroup_account_ref. |
| 2144 | * However, btrfs_qgroup_account_ref may be right after its call |
| 2145 | * to btrfs_find_all_roots, in which case it would still do the |
| 2146 | * accounting. |
| 2147 | * To solve this, we're committing the transaction, which will |
| 2148 | * ensure we run all delayed refs and only after that, we are |
| 2149 | * going to clear all tracking information for a clean start. |
| 2150 | */ |
| 2151 | |
| 2152 | trans = btrfs_join_transaction(fs_info->fs_root); |
| 2153 | if (IS_ERR(trans)) { |
| 2154 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2155 | return PTR_ERR(trans); |
| 2156 | } |
| 2157 | ret = btrfs_commit_transaction(trans, fs_info->fs_root); |
| 2158 | if (ret) { |
| 2159 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2160 | return ret; |
| 2161 | } |
| 2162 | |
| 2163 | qgroup_rescan_zero_tracking(fs_info); |
| 2164 | |
| 2165 | btrfs_queue_worker(&fs_info->qgroup_rescan_workers, |
| 2166 | &fs_info->qgroup_rescan_work); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2167 | |
| 2168 | return 0; |
| 2169 | } |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 2170 | |
| 2171 | int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info) |
| 2172 | { |
| 2173 | int running; |
| 2174 | int ret = 0; |
| 2175 | |
| 2176 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2177 | spin_lock(&fs_info->qgroup_lock); |
| 2178 | running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2179 | spin_unlock(&fs_info->qgroup_lock); |
| 2180 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2181 | |
| 2182 | if (running) |
| 2183 | ret = wait_for_completion_interruptible( |
| 2184 | &fs_info->qgroup_rescan_completion); |
| 2185 | |
| 2186 | return ret; |
| 2187 | } |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2188 | |
| 2189 | /* |
| 2190 | * this is only called from open_ctree where we're still single threaded, thus |
| 2191 | * locking is omitted here. |
| 2192 | */ |
| 2193 | void |
| 2194 | btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info) |
| 2195 | { |
| 2196 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) |
| 2197 | btrfs_queue_worker(&fs_info->qgroup_rescan_workers, |
| 2198 | &fs_info->qgroup_rescan_work); |
| 2199 | } |