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) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 304 | btrfs_err(fs_info, |
| 305 | "old qgroup version, quota disabled"); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 306 | goto out; |
| 307 | } |
| 308 | if (btrfs_qgroup_status_generation(l, ptr) != |
| 309 | fs_info->generation) { |
| 310 | flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 311 | btrfs_err(fs_info, |
| 312 | "qgroup generation mismatch, " |
| 313 | "marked as inconsistent"); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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)) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 328 | btrfs_err(fs_info, "inconsitent qgroup config"); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 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) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 399 | btrfs_warn(fs_info, |
| 400 | "orphan qgroup relation 0x%llx->0x%llx", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 401 | found_key.objectid, found_key.offset); |
Arne Jansen | ff24858 | 2013-01-17 01:22:08 -0700 | [diff] [blame] | 402 | ret = 0; /* ignore the error */ |
| 403 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 404 | if (ret) |
| 405 | goto out; |
| 406 | next2: |
| 407 | ret = btrfs_next_item(quota_root, path); |
| 408 | if (ret < 0) |
| 409 | goto out; |
| 410 | if (ret) |
| 411 | break; |
| 412 | } |
| 413 | out: |
| 414 | fs_info->qgroup_flags |= flags; |
| 415 | if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) { |
| 416 | fs_info->quota_enabled = 0; |
| 417 | fs_info->pending_quota_state = 0; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 418 | } else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN && |
| 419 | ret >= 0) { |
| 420 | ret = qgroup_rescan_init(fs_info, rescan_progress, 0); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 421 | } |
| 422 | btrfs_free_path(path); |
| 423 | |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 424 | if (ret < 0) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 425 | ulist_free(fs_info->qgroup_ulist); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 426 | fs_info->qgroup_ulist = NULL; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 427 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 428 | } |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 429 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 430 | return ret < 0 ? ret : 0; |
| 431 | } |
| 432 | |
| 433 | /* |
Wang Shilong | e685da1 | 2013-08-14 09:13:37 +0800 | [diff] [blame] | 434 | * This is called from close_ctree() or open_ctree() or btrfs_quota_disable(), |
| 435 | * first two are in single-threaded paths.And for the third one, we have set |
| 436 | * quota_root to be null with qgroup_lock held before, so it is safe to clean |
| 437 | * up the in-memory structures without qgroup_lock held. |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 438 | */ |
| 439 | void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info) |
| 440 | { |
| 441 | struct rb_node *n; |
| 442 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 443 | |
| 444 | while ((n = rb_first(&fs_info->qgroup_tree))) { |
| 445 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 446 | rb_erase(n, &fs_info->qgroup_tree); |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 447 | __del_qgroup_rb(qgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 448 | } |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 449 | /* |
| 450 | * we call btrfs_free_qgroup_config() when umounting |
| 451 | * filesystem and disabling quota, so we set qgroup_ulit |
| 452 | * to be null here to avoid double free. |
| 453 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 454 | ulist_free(fs_info->qgroup_ulist); |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 455 | fs_info->qgroup_ulist = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 456 | } |
| 457 | |
| 458 | static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, |
| 459 | struct btrfs_root *quota_root, |
| 460 | u64 src, u64 dst) |
| 461 | { |
| 462 | int ret; |
| 463 | struct btrfs_path *path; |
| 464 | struct btrfs_key key; |
| 465 | |
| 466 | path = btrfs_alloc_path(); |
| 467 | if (!path) |
| 468 | return -ENOMEM; |
| 469 | |
| 470 | key.objectid = src; |
| 471 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 472 | key.offset = dst; |
| 473 | |
| 474 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, 0); |
| 475 | |
| 476 | btrfs_mark_buffer_dirty(path->nodes[0]); |
| 477 | |
| 478 | btrfs_free_path(path); |
| 479 | return ret; |
| 480 | } |
| 481 | |
| 482 | static int del_qgroup_relation_item(struct btrfs_trans_handle *trans, |
| 483 | struct btrfs_root *quota_root, |
| 484 | u64 src, u64 dst) |
| 485 | { |
| 486 | int ret; |
| 487 | struct btrfs_path *path; |
| 488 | struct btrfs_key key; |
| 489 | |
| 490 | path = btrfs_alloc_path(); |
| 491 | if (!path) |
| 492 | return -ENOMEM; |
| 493 | |
| 494 | key.objectid = src; |
| 495 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 496 | key.offset = dst; |
| 497 | |
| 498 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 499 | if (ret < 0) |
| 500 | goto out; |
| 501 | |
| 502 | if (ret > 0) { |
| 503 | ret = -ENOENT; |
| 504 | goto out; |
| 505 | } |
| 506 | |
| 507 | ret = btrfs_del_item(trans, quota_root, path); |
| 508 | out: |
| 509 | btrfs_free_path(path); |
| 510 | return ret; |
| 511 | } |
| 512 | |
| 513 | static int add_qgroup_item(struct btrfs_trans_handle *trans, |
| 514 | struct btrfs_root *quota_root, u64 qgroupid) |
| 515 | { |
| 516 | int ret; |
| 517 | struct btrfs_path *path; |
| 518 | struct btrfs_qgroup_info_item *qgroup_info; |
| 519 | struct btrfs_qgroup_limit_item *qgroup_limit; |
| 520 | struct extent_buffer *leaf; |
| 521 | struct btrfs_key key; |
| 522 | |
| 523 | path = btrfs_alloc_path(); |
| 524 | if (!path) |
| 525 | return -ENOMEM; |
| 526 | |
| 527 | key.objectid = 0; |
| 528 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 529 | key.offset = qgroupid; |
| 530 | |
| 531 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 532 | sizeof(*qgroup_info)); |
| 533 | if (ret) |
| 534 | goto out; |
| 535 | |
| 536 | leaf = path->nodes[0]; |
| 537 | qgroup_info = btrfs_item_ptr(leaf, path->slots[0], |
| 538 | struct btrfs_qgroup_info_item); |
| 539 | btrfs_set_qgroup_info_generation(leaf, qgroup_info, trans->transid); |
| 540 | btrfs_set_qgroup_info_rfer(leaf, qgroup_info, 0); |
| 541 | btrfs_set_qgroup_info_rfer_cmpr(leaf, qgroup_info, 0); |
| 542 | btrfs_set_qgroup_info_excl(leaf, qgroup_info, 0); |
| 543 | btrfs_set_qgroup_info_excl_cmpr(leaf, qgroup_info, 0); |
| 544 | |
| 545 | btrfs_mark_buffer_dirty(leaf); |
| 546 | |
| 547 | btrfs_release_path(path); |
| 548 | |
| 549 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 550 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 551 | sizeof(*qgroup_limit)); |
| 552 | if (ret) |
| 553 | goto out; |
| 554 | |
| 555 | leaf = path->nodes[0]; |
| 556 | qgroup_limit = btrfs_item_ptr(leaf, path->slots[0], |
| 557 | struct btrfs_qgroup_limit_item); |
| 558 | btrfs_set_qgroup_limit_flags(leaf, qgroup_limit, 0); |
| 559 | btrfs_set_qgroup_limit_max_rfer(leaf, qgroup_limit, 0); |
| 560 | btrfs_set_qgroup_limit_max_excl(leaf, qgroup_limit, 0); |
| 561 | btrfs_set_qgroup_limit_rsv_rfer(leaf, qgroup_limit, 0); |
| 562 | btrfs_set_qgroup_limit_rsv_excl(leaf, qgroup_limit, 0); |
| 563 | |
| 564 | btrfs_mark_buffer_dirty(leaf); |
| 565 | |
| 566 | ret = 0; |
| 567 | out: |
| 568 | btrfs_free_path(path); |
| 569 | return ret; |
| 570 | } |
| 571 | |
| 572 | static int del_qgroup_item(struct btrfs_trans_handle *trans, |
| 573 | struct btrfs_root *quota_root, u64 qgroupid) |
| 574 | { |
| 575 | int ret; |
| 576 | struct btrfs_path *path; |
| 577 | struct btrfs_key key; |
| 578 | |
| 579 | path = btrfs_alloc_path(); |
| 580 | if (!path) |
| 581 | return -ENOMEM; |
| 582 | |
| 583 | key.objectid = 0; |
| 584 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 585 | key.offset = qgroupid; |
| 586 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 587 | if (ret < 0) |
| 588 | goto out; |
| 589 | |
| 590 | if (ret > 0) { |
| 591 | ret = -ENOENT; |
| 592 | goto out; |
| 593 | } |
| 594 | |
| 595 | ret = btrfs_del_item(trans, quota_root, path); |
| 596 | if (ret) |
| 597 | goto out; |
| 598 | |
| 599 | btrfs_release_path(path); |
| 600 | |
| 601 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 602 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 603 | if (ret < 0) |
| 604 | goto out; |
| 605 | |
| 606 | if (ret > 0) { |
| 607 | ret = -ENOENT; |
| 608 | goto out; |
| 609 | } |
| 610 | |
| 611 | ret = btrfs_del_item(trans, quota_root, path); |
| 612 | |
| 613 | out: |
| 614 | btrfs_free_path(path); |
| 615 | return ret; |
| 616 | } |
| 617 | |
| 618 | static int update_qgroup_limit_item(struct btrfs_trans_handle *trans, |
| 619 | struct btrfs_root *root, u64 qgroupid, |
| 620 | u64 flags, u64 max_rfer, u64 max_excl, |
| 621 | u64 rsv_rfer, u64 rsv_excl) |
| 622 | { |
| 623 | struct btrfs_path *path; |
| 624 | struct btrfs_key key; |
| 625 | struct extent_buffer *l; |
| 626 | struct btrfs_qgroup_limit_item *qgroup_limit; |
| 627 | int ret; |
| 628 | int slot; |
| 629 | |
| 630 | key.objectid = 0; |
| 631 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 632 | key.offset = qgroupid; |
| 633 | |
| 634 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 635 | if (!path) |
| 636 | return -ENOMEM; |
| 637 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 638 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
| 639 | if (ret > 0) |
| 640 | ret = -ENOENT; |
| 641 | |
| 642 | if (ret) |
| 643 | goto out; |
| 644 | |
| 645 | l = path->nodes[0]; |
| 646 | slot = path->slots[0]; |
Valentina Giusti | a3df41e | 2013-11-04 22:34:29 +0100 | [diff] [blame] | 647 | qgroup_limit = btrfs_item_ptr(l, slot, struct btrfs_qgroup_limit_item); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 648 | btrfs_set_qgroup_limit_flags(l, qgroup_limit, flags); |
| 649 | btrfs_set_qgroup_limit_max_rfer(l, qgroup_limit, max_rfer); |
| 650 | btrfs_set_qgroup_limit_max_excl(l, qgroup_limit, max_excl); |
| 651 | btrfs_set_qgroup_limit_rsv_rfer(l, qgroup_limit, rsv_rfer); |
| 652 | btrfs_set_qgroup_limit_rsv_excl(l, qgroup_limit, rsv_excl); |
| 653 | |
| 654 | btrfs_mark_buffer_dirty(l); |
| 655 | |
| 656 | out: |
| 657 | btrfs_free_path(path); |
| 658 | return ret; |
| 659 | } |
| 660 | |
| 661 | static int update_qgroup_info_item(struct btrfs_trans_handle *trans, |
| 662 | struct btrfs_root *root, |
| 663 | struct btrfs_qgroup *qgroup) |
| 664 | { |
| 665 | struct btrfs_path *path; |
| 666 | struct btrfs_key key; |
| 667 | struct extent_buffer *l; |
| 668 | struct btrfs_qgroup_info_item *qgroup_info; |
| 669 | int ret; |
| 670 | int slot; |
| 671 | |
| 672 | key.objectid = 0; |
| 673 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 674 | key.offset = qgroup->qgroupid; |
| 675 | |
| 676 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 677 | if (!path) |
| 678 | return -ENOMEM; |
| 679 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 680 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
| 681 | if (ret > 0) |
| 682 | ret = -ENOENT; |
| 683 | |
| 684 | if (ret) |
| 685 | goto out; |
| 686 | |
| 687 | l = path->nodes[0]; |
| 688 | slot = path->slots[0]; |
Valentina Giusti | a3df41e | 2013-11-04 22:34:29 +0100 | [diff] [blame] | 689 | qgroup_info = btrfs_item_ptr(l, slot, struct btrfs_qgroup_info_item); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 690 | btrfs_set_qgroup_info_generation(l, qgroup_info, trans->transid); |
| 691 | btrfs_set_qgroup_info_rfer(l, qgroup_info, qgroup->rfer); |
| 692 | btrfs_set_qgroup_info_rfer_cmpr(l, qgroup_info, qgroup->rfer_cmpr); |
| 693 | btrfs_set_qgroup_info_excl(l, qgroup_info, qgroup->excl); |
| 694 | btrfs_set_qgroup_info_excl_cmpr(l, qgroup_info, qgroup->excl_cmpr); |
| 695 | |
| 696 | btrfs_mark_buffer_dirty(l); |
| 697 | |
| 698 | out: |
| 699 | btrfs_free_path(path); |
| 700 | return ret; |
| 701 | } |
| 702 | |
| 703 | static int update_qgroup_status_item(struct btrfs_trans_handle *trans, |
| 704 | struct btrfs_fs_info *fs_info, |
| 705 | struct btrfs_root *root) |
| 706 | { |
| 707 | struct btrfs_path *path; |
| 708 | struct btrfs_key key; |
| 709 | struct extent_buffer *l; |
| 710 | struct btrfs_qgroup_status_item *ptr; |
| 711 | int ret; |
| 712 | int slot; |
| 713 | |
| 714 | key.objectid = 0; |
| 715 | key.type = BTRFS_QGROUP_STATUS_KEY; |
| 716 | key.offset = 0; |
| 717 | |
| 718 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 719 | if (!path) |
| 720 | return -ENOMEM; |
| 721 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 722 | ret = btrfs_search_slot(trans, root, &key, path, 0, 1); |
| 723 | if (ret > 0) |
| 724 | ret = -ENOENT; |
| 725 | |
| 726 | if (ret) |
| 727 | goto out; |
| 728 | |
| 729 | l = path->nodes[0]; |
| 730 | slot = path->slots[0]; |
| 731 | ptr = btrfs_item_ptr(l, slot, struct btrfs_qgroup_status_item); |
| 732 | btrfs_set_qgroup_status_flags(l, ptr, fs_info->qgroup_flags); |
| 733 | btrfs_set_qgroup_status_generation(l, ptr, trans->transid); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 734 | btrfs_set_qgroup_status_rescan(l, ptr, |
| 735 | fs_info->qgroup_rescan_progress.objectid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 736 | |
| 737 | btrfs_mark_buffer_dirty(l); |
| 738 | |
| 739 | out: |
| 740 | btrfs_free_path(path); |
| 741 | return ret; |
| 742 | } |
| 743 | |
| 744 | /* |
| 745 | * called with qgroup_lock held |
| 746 | */ |
| 747 | static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans, |
| 748 | struct btrfs_root *root) |
| 749 | { |
| 750 | struct btrfs_path *path; |
| 751 | struct btrfs_key key; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 752 | struct extent_buffer *leaf = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 753 | int ret; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 754 | int nr = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 755 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 756 | path = btrfs_alloc_path(); |
| 757 | if (!path) |
| 758 | return -ENOMEM; |
| 759 | |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 760 | path->leave_spinning = 1; |
| 761 | |
| 762 | key.objectid = 0; |
| 763 | key.offset = 0; |
| 764 | key.type = 0; |
| 765 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 766 | while (1) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 767 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 768 | if (ret < 0) |
| 769 | goto out; |
| 770 | leaf = path->nodes[0]; |
| 771 | nr = btrfs_header_nritems(leaf); |
| 772 | if (!nr) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 773 | break; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 774 | /* |
| 775 | * delete the leaf one by one |
| 776 | * since the whole tree is going |
| 777 | * to be deleted. |
| 778 | */ |
| 779 | path->slots[0] = 0; |
| 780 | ret = btrfs_del_items(trans, root, path, 0, nr); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 781 | if (ret) |
| 782 | goto out; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 783 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 784 | btrfs_release_path(path); |
| 785 | } |
| 786 | ret = 0; |
| 787 | out: |
| 788 | root->fs_info->pending_quota_state = 0; |
| 789 | btrfs_free_path(path); |
| 790 | return ret; |
| 791 | } |
| 792 | |
| 793 | int btrfs_quota_enable(struct btrfs_trans_handle *trans, |
| 794 | struct btrfs_fs_info *fs_info) |
| 795 | { |
| 796 | struct btrfs_root *quota_root; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 797 | struct btrfs_root *tree_root = fs_info->tree_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 798 | struct btrfs_path *path = NULL; |
| 799 | struct btrfs_qgroup_status_item *ptr; |
| 800 | struct extent_buffer *leaf; |
| 801 | struct btrfs_key key; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 802 | struct btrfs_key found_key; |
| 803 | struct btrfs_qgroup *qgroup = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 804 | int ret = 0; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 805 | int slot; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 806 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 807 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 808 | if (fs_info->quota_root) { |
| 809 | fs_info->pending_quota_state = 1; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 810 | goto out; |
| 811 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 812 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 813 | fs_info->qgroup_ulist = ulist_alloc(GFP_NOFS); |
| 814 | if (!fs_info->qgroup_ulist) { |
| 815 | ret = -ENOMEM; |
| 816 | goto out; |
| 817 | } |
| 818 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 819 | /* |
| 820 | * initially create the quota tree |
| 821 | */ |
| 822 | quota_root = btrfs_create_tree(trans, fs_info, |
| 823 | BTRFS_QUOTA_TREE_OBJECTID); |
| 824 | if (IS_ERR(quota_root)) { |
| 825 | ret = PTR_ERR(quota_root); |
| 826 | goto out; |
| 827 | } |
| 828 | |
| 829 | path = btrfs_alloc_path(); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 830 | if (!path) { |
| 831 | ret = -ENOMEM; |
| 832 | goto out_free_root; |
| 833 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 834 | |
| 835 | key.objectid = 0; |
| 836 | key.type = BTRFS_QGROUP_STATUS_KEY; |
| 837 | key.offset = 0; |
| 838 | |
| 839 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 840 | sizeof(*ptr)); |
| 841 | if (ret) |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 842 | goto out_free_path; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 843 | |
| 844 | leaf = path->nodes[0]; |
| 845 | ptr = btrfs_item_ptr(leaf, path->slots[0], |
| 846 | struct btrfs_qgroup_status_item); |
| 847 | btrfs_set_qgroup_status_generation(leaf, ptr, trans->transid); |
| 848 | btrfs_set_qgroup_status_version(leaf, ptr, BTRFS_QGROUP_STATUS_VERSION); |
| 849 | fs_info->qgroup_flags = BTRFS_QGROUP_STATUS_FLAG_ON | |
| 850 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 851 | btrfs_set_qgroup_status_flags(leaf, ptr, fs_info->qgroup_flags); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 852 | btrfs_set_qgroup_status_rescan(leaf, ptr, 0); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 853 | |
| 854 | btrfs_mark_buffer_dirty(leaf); |
| 855 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 856 | key.objectid = 0; |
| 857 | key.type = BTRFS_ROOT_REF_KEY; |
| 858 | key.offset = 0; |
| 859 | |
| 860 | btrfs_release_path(path); |
| 861 | ret = btrfs_search_slot_for_read(tree_root, &key, path, 1, 0); |
| 862 | if (ret > 0) |
| 863 | goto out_add_root; |
| 864 | if (ret < 0) |
| 865 | goto out_free_path; |
| 866 | |
| 867 | |
| 868 | while (1) { |
| 869 | slot = path->slots[0]; |
| 870 | leaf = path->nodes[0]; |
| 871 | btrfs_item_key_to_cpu(leaf, &found_key, slot); |
| 872 | |
| 873 | if (found_key.type == BTRFS_ROOT_REF_KEY) { |
| 874 | ret = add_qgroup_item(trans, quota_root, |
| 875 | found_key.offset); |
| 876 | if (ret) |
| 877 | goto out_free_path; |
| 878 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 879 | qgroup = add_qgroup_rb(fs_info, found_key.offset); |
| 880 | if (IS_ERR(qgroup)) { |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 881 | ret = PTR_ERR(qgroup); |
| 882 | goto out_free_path; |
| 883 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 884 | } |
| 885 | ret = btrfs_next_item(tree_root, path); |
| 886 | if (ret < 0) |
| 887 | goto out_free_path; |
| 888 | if (ret) |
| 889 | break; |
| 890 | } |
| 891 | |
| 892 | out_add_root: |
| 893 | btrfs_release_path(path); |
| 894 | ret = add_qgroup_item(trans, quota_root, BTRFS_FS_TREE_OBJECTID); |
| 895 | if (ret) |
| 896 | goto out_free_path; |
| 897 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 898 | qgroup = add_qgroup_rb(fs_info, BTRFS_FS_TREE_OBJECTID); |
| 899 | if (IS_ERR(qgroup)) { |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 900 | ret = PTR_ERR(qgroup); |
| 901 | goto out_free_path; |
| 902 | } |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 903 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 904 | fs_info->quota_root = quota_root; |
| 905 | fs_info->pending_quota_state = 1; |
| 906 | spin_unlock(&fs_info->qgroup_lock); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 907 | out_free_path: |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 908 | btrfs_free_path(path); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 909 | out_free_root: |
| 910 | if (ret) { |
| 911 | free_extent_buffer(quota_root->node); |
| 912 | free_extent_buffer(quota_root->commit_root); |
| 913 | kfree(quota_root); |
| 914 | } |
| 915 | out: |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 916 | if (ret) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 917 | ulist_free(fs_info->qgroup_ulist); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 918 | fs_info->qgroup_ulist = NULL; |
| 919 | } |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 920 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 921 | return ret; |
| 922 | } |
| 923 | |
| 924 | int btrfs_quota_disable(struct btrfs_trans_handle *trans, |
| 925 | struct btrfs_fs_info *fs_info) |
| 926 | { |
| 927 | struct btrfs_root *tree_root = fs_info->tree_root; |
| 928 | struct btrfs_root *quota_root; |
| 929 | int ret = 0; |
| 930 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 931 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 932 | if (!fs_info->quota_root) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 933 | goto out; |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 934 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 935 | fs_info->quota_enabled = 0; |
| 936 | fs_info->pending_quota_state = 0; |
| 937 | quota_root = fs_info->quota_root; |
| 938 | fs_info->quota_root = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 939 | spin_unlock(&fs_info->qgroup_lock); |
| 940 | |
Wang Shilong | e685da1 | 2013-08-14 09:13:37 +0800 | [diff] [blame] | 941 | btrfs_free_qgroup_config(fs_info); |
| 942 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 943 | ret = btrfs_clean_quota_tree(trans, quota_root); |
| 944 | if (ret) |
| 945 | goto out; |
| 946 | |
| 947 | ret = btrfs_del_root(trans, tree_root, "a_root->root_key); |
| 948 | if (ret) |
| 949 | goto out; |
| 950 | |
| 951 | list_del("a_root->dirty_list); |
| 952 | |
| 953 | btrfs_tree_lock(quota_root->node); |
| 954 | clean_tree_block(trans, tree_root, quota_root->node); |
| 955 | btrfs_tree_unlock(quota_root->node); |
| 956 | btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1); |
| 957 | |
| 958 | free_extent_buffer(quota_root->node); |
| 959 | free_extent_buffer(quota_root->commit_root); |
| 960 | kfree(quota_root); |
| 961 | out: |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 962 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 963 | return ret; |
| 964 | } |
| 965 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 966 | static void qgroup_dirty(struct btrfs_fs_info *fs_info, |
| 967 | struct btrfs_qgroup *qgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 968 | { |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 969 | if (list_empty(&qgroup->dirty)) |
| 970 | list_add(&qgroup->dirty, &fs_info->dirty_qgroups); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, |
| 974 | struct btrfs_fs_info *fs_info, u64 src, u64 dst) |
| 975 | { |
| 976 | struct btrfs_root *quota_root; |
Wang Shilong | b7fef4f | 2013-04-07 10:50:18 +0000 | [diff] [blame] | 977 | struct btrfs_qgroup *parent; |
| 978 | struct btrfs_qgroup *member; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 979 | struct btrfs_qgroup_list *list; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 980 | int ret = 0; |
| 981 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 982 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 983 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 984 | if (!quota_root) { |
| 985 | ret = -EINVAL; |
| 986 | goto out; |
| 987 | } |
Wang Shilong | b7fef4f | 2013-04-07 10:50:18 +0000 | [diff] [blame] | 988 | member = find_qgroup_rb(fs_info, src); |
| 989 | parent = find_qgroup_rb(fs_info, dst); |
| 990 | if (!member || !parent) { |
| 991 | ret = -EINVAL; |
| 992 | goto out; |
| 993 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 994 | |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 995 | /* check if such qgroup relation exist firstly */ |
| 996 | list_for_each_entry(list, &member->groups, next_group) { |
| 997 | if (list->group == parent) { |
| 998 | ret = -EEXIST; |
| 999 | goto out; |
| 1000 | } |
| 1001 | } |
| 1002 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1003 | ret = add_qgroup_relation_item(trans, quota_root, src, dst); |
| 1004 | if (ret) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1005 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1006 | |
| 1007 | ret = add_qgroup_relation_item(trans, quota_root, dst, src); |
| 1008 | if (ret) { |
| 1009 | del_qgroup_relation_item(trans, quota_root, src, dst); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1010 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1011 | } |
| 1012 | |
| 1013 | spin_lock(&fs_info->qgroup_lock); |
| 1014 | ret = add_relation_rb(quota_root->fs_info, src, dst); |
| 1015 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1016 | out: |
| 1017 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1018 | return ret; |
| 1019 | } |
| 1020 | |
| 1021 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, |
| 1022 | struct btrfs_fs_info *fs_info, u64 src, u64 dst) |
| 1023 | { |
| 1024 | struct btrfs_root *quota_root; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1025 | struct btrfs_qgroup *parent; |
| 1026 | struct btrfs_qgroup *member; |
| 1027 | struct btrfs_qgroup_list *list; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1028 | int ret = 0; |
| 1029 | int err; |
| 1030 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1031 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1032 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1033 | if (!quota_root) { |
| 1034 | ret = -EINVAL; |
| 1035 | goto out; |
| 1036 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1037 | |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1038 | member = find_qgroup_rb(fs_info, src); |
| 1039 | parent = find_qgroup_rb(fs_info, dst); |
| 1040 | if (!member || !parent) { |
| 1041 | ret = -EINVAL; |
| 1042 | goto out; |
| 1043 | } |
| 1044 | |
| 1045 | /* check if such qgroup relation exist firstly */ |
| 1046 | list_for_each_entry(list, &member->groups, next_group) { |
| 1047 | if (list->group == parent) |
| 1048 | goto exist; |
| 1049 | } |
| 1050 | ret = -ENOENT; |
| 1051 | goto out; |
| 1052 | exist: |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1053 | ret = del_qgroup_relation_item(trans, quota_root, src, dst); |
| 1054 | err = del_qgroup_relation_item(trans, quota_root, dst, src); |
| 1055 | if (err && !ret) |
| 1056 | ret = err; |
| 1057 | |
| 1058 | spin_lock(&fs_info->qgroup_lock); |
| 1059 | del_relation_rb(fs_info, src, dst); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1060 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1061 | out: |
| 1062 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1063 | return ret; |
| 1064 | } |
| 1065 | |
| 1066 | int btrfs_create_qgroup(struct btrfs_trans_handle *trans, |
| 1067 | struct btrfs_fs_info *fs_info, u64 qgroupid, char *name) |
| 1068 | { |
| 1069 | struct btrfs_root *quota_root; |
| 1070 | struct btrfs_qgroup *qgroup; |
| 1071 | int ret = 0; |
| 1072 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1073 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1074 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1075 | if (!quota_root) { |
| 1076 | ret = -EINVAL; |
| 1077 | goto out; |
| 1078 | } |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1079 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 1080 | if (qgroup) { |
| 1081 | ret = -EEXIST; |
| 1082 | goto out; |
| 1083 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1084 | |
| 1085 | ret = add_qgroup_item(trans, quota_root, qgroupid); |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1086 | if (ret) |
| 1087 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1088 | |
| 1089 | spin_lock(&fs_info->qgroup_lock); |
| 1090 | qgroup = add_qgroup_rb(fs_info, qgroupid); |
| 1091 | spin_unlock(&fs_info->qgroup_lock); |
| 1092 | |
| 1093 | if (IS_ERR(qgroup)) |
| 1094 | ret = PTR_ERR(qgroup); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1095 | out: |
| 1096 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1097 | return ret; |
| 1098 | } |
| 1099 | |
| 1100 | int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, |
| 1101 | struct btrfs_fs_info *fs_info, u64 qgroupid) |
| 1102 | { |
| 1103 | struct btrfs_root *quota_root; |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1104 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1105 | int ret = 0; |
| 1106 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1107 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1108 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1109 | if (!quota_root) { |
| 1110 | ret = -EINVAL; |
| 1111 | goto out; |
| 1112 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1113 | |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1114 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1115 | if (!qgroup) { |
| 1116 | ret = -ENOENT; |
| 1117 | goto out; |
| 1118 | } else { |
| 1119 | /* check if there are no relations to this qgroup */ |
| 1120 | if (!list_empty(&qgroup->groups) || |
| 1121 | !list_empty(&qgroup->members)) { |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1122 | ret = -EBUSY; |
| 1123 | goto out; |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1124 | } |
| 1125 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1126 | ret = del_qgroup_item(trans, quota_root, qgroupid); |
| 1127 | |
| 1128 | spin_lock(&fs_info->qgroup_lock); |
| 1129 | del_qgroup_rb(quota_root->fs_info, qgroupid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1130 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1131 | out: |
| 1132 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1133 | return ret; |
| 1134 | } |
| 1135 | |
| 1136 | int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, |
| 1137 | struct btrfs_fs_info *fs_info, u64 qgroupid, |
| 1138 | struct btrfs_qgroup_limit *limit) |
| 1139 | { |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1140 | struct btrfs_root *quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1141 | struct btrfs_qgroup *qgroup; |
| 1142 | int ret = 0; |
| 1143 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1144 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
| 1145 | quota_root = fs_info->quota_root; |
| 1146 | if (!quota_root) { |
| 1147 | ret = -EINVAL; |
| 1148 | goto out; |
| 1149 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1150 | |
Wang Shilong | ddb47af | 2013-04-07 10:50:20 +0000 | [diff] [blame] | 1151 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 1152 | if (!qgroup) { |
| 1153 | ret = -ENOENT; |
| 1154 | goto out; |
| 1155 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1156 | ret = update_qgroup_limit_item(trans, quota_root, qgroupid, |
| 1157 | limit->flags, limit->max_rfer, |
| 1158 | limit->max_excl, limit->rsv_rfer, |
| 1159 | limit->rsv_excl); |
| 1160 | if (ret) { |
| 1161 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 1162 | btrfs_info(fs_info, "unable to update quota limit for %llu", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 1163 | qgroupid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1164 | } |
| 1165 | |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 1166 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1167 | qgroup->lim_flags = limit->flags; |
| 1168 | qgroup->max_rfer = limit->max_rfer; |
| 1169 | qgroup->max_excl = limit->max_excl; |
| 1170 | qgroup->rsv_rfer = limit->rsv_rfer; |
| 1171 | qgroup->rsv_excl = limit->rsv_excl; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1172 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1173 | out: |
| 1174 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1175 | return ret; |
| 1176 | } |
| 1177 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1178 | /* |
| 1179 | * btrfs_qgroup_record_ref is called when the ref is added or deleted. it puts |
| 1180 | * the modification into a list that's later used by btrfs_end_transaction to |
| 1181 | * pass the recorded modifications on to btrfs_qgroup_account_ref. |
| 1182 | */ |
| 1183 | int btrfs_qgroup_record_ref(struct btrfs_trans_handle *trans, |
| 1184 | struct btrfs_delayed_ref_node *node, |
| 1185 | struct btrfs_delayed_extent_op *extent_op) |
| 1186 | { |
| 1187 | struct qgroup_update *u; |
| 1188 | |
| 1189 | BUG_ON(!trans->delayed_ref_elem.seq); |
| 1190 | u = kmalloc(sizeof(*u), GFP_NOFS); |
| 1191 | if (!u) |
| 1192 | return -ENOMEM; |
| 1193 | |
| 1194 | u->node = node; |
| 1195 | u->extent_op = extent_op; |
| 1196 | list_add_tail(&u->list, &trans->qgroup_ref_list); |
| 1197 | |
| 1198 | return 0; |
| 1199 | } |
| 1200 | |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1201 | static int qgroup_account_ref_step1(struct btrfs_fs_info *fs_info, |
| 1202 | struct ulist *roots, struct ulist *tmp, |
| 1203 | u64 seq) |
| 1204 | { |
| 1205 | struct ulist_node *unode; |
| 1206 | struct ulist_iterator uiter; |
| 1207 | struct ulist_node *tmp_unode; |
| 1208 | struct ulist_iterator tmp_uiter; |
| 1209 | struct btrfs_qgroup *qg; |
| 1210 | int ret; |
| 1211 | |
| 1212 | ULIST_ITER_INIT(&uiter); |
| 1213 | while ((unode = ulist_next(roots, &uiter))) { |
| 1214 | qg = find_qgroup_rb(fs_info, unode->val); |
| 1215 | if (!qg) |
| 1216 | continue; |
| 1217 | |
| 1218 | ulist_reinit(tmp); |
| 1219 | /* XXX id not needed */ |
| 1220 | ret = ulist_add(tmp, qg->qgroupid, |
| 1221 | (u64)(uintptr_t)qg, GFP_ATOMIC); |
| 1222 | if (ret < 0) |
| 1223 | return ret; |
| 1224 | ULIST_ITER_INIT(&tmp_uiter); |
| 1225 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { |
| 1226 | struct btrfs_qgroup_list *glist; |
| 1227 | |
| 1228 | qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; |
| 1229 | if (qg->refcnt < seq) |
| 1230 | qg->refcnt = seq + 1; |
| 1231 | else |
| 1232 | ++qg->refcnt; |
| 1233 | |
| 1234 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1235 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1236 | (u64)(uintptr_t)glist->group, |
| 1237 | GFP_ATOMIC); |
| 1238 | if (ret < 0) |
| 1239 | return ret; |
| 1240 | } |
| 1241 | } |
| 1242 | } |
| 1243 | |
| 1244 | return 0; |
| 1245 | } |
| 1246 | |
| 1247 | static int qgroup_account_ref_step2(struct btrfs_fs_info *fs_info, |
| 1248 | struct ulist *roots, struct ulist *tmp, |
| 1249 | u64 seq, int sgn, u64 num_bytes, |
| 1250 | struct btrfs_qgroup *qgroup) |
| 1251 | { |
| 1252 | struct ulist_node *unode; |
| 1253 | struct ulist_iterator uiter; |
| 1254 | struct btrfs_qgroup *qg; |
| 1255 | struct btrfs_qgroup_list *glist; |
| 1256 | int ret; |
| 1257 | |
| 1258 | ulist_reinit(tmp); |
| 1259 | ret = ulist_add(tmp, qgroup->qgroupid, (uintptr_t)qgroup, GFP_ATOMIC); |
| 1260 | if (ret < 0) |
| 1261 | return ret; |
| 1262 | |
| 1263 | ULIST_ITER_INIT(&uiter); |
| 1264 | while ((unode = ulist_next(tmp, &uiter))) { |
| 1265 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
| 1266 | if (qg->refcnt < seq) { |
| 1267 | /* not visited by step 1 */ |
| 1268 | qg->rfer += sgn * num_bytes; |
| 1269 | qg->rfer_cmpr += sgn * num_bytes; |
| 1270 | if (roots->nnodes == 0) { |
| 1271 | qg->excl += sgn * num_bytes; |
| 1272 | qg->excl_cmpr += sgn * num_bytes; |
| 1273 | } |
| 1274 | qgroup_dirty(fs_info, qg); |
| 1275 | } |
| 1276 | WARN_ON(qg->tag >= seq); |
| 1277 | qg->tag = seq; |
| 1278 | |
| 1279 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1280 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1281 | (uintptr_t)glist->group, GFP_ATOMIC); |
| 1282 | if (ret < 0) |
| 1283 | return ret; |
| 1284 | } |
| 1285 | } |
| 1286 | |
| 1287 | return 0; |
| 1288 | } |
| 1289 | |
| 1290 | static int qgroup_account_ref_step3(struct btrfs_fs_info *fs_info, |
| 1291 | struct ulist *roots, struct ulist *tmp, |
| 1292 | u64 seq, int sgn, u64 num_bytes) |
| 1293 | { |
| 1294 | struct ulist_node *unode; |
| 1295 | struct ulist_iterator uiter; |
| 1296 | struct btrfs_qgroup *qg; |
| 1297 | struct ulist_node *tmp_unode; |
| 1298 | struct ulist_iterator tmp_uiter; |
| 1299 | int ret; |
| 1300 | |
| 1301 | ULIST_ITER_INIT(&uiter); |
| 1302 | while ((unode = ulist_next(roots, &uiter))) { |
| 1303 | qg = find_qgroup_rb(fs_info, unode->val); |
| 1304 | if (!qg) |
| 1305 | continue; |
| 1306 | |
| 1307 | ulist_reinit(tmp); |
| 1308 | ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, GFP_ATOMIC); |
| 1309 | if (ret < 0) |
| 1310 | return ret; |
| 1311 | |
| 1312 | ULIST_ITER_INIT(&tmp_uiter); |
| 1313 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { |
| 1314 | struct btrfs_qgroup_list *glist; |
| 1315 | |
| 1316 | qg = (struct btrfs_qgroup *)(uintptr_t)tmp_unode->aux; |
| 1317 | if (qg->tag == seq) |
| 1318 | continue; |
| 1319 | |
| 1320 | if (qg->refcnt - seq == roots->nnodes) { |
| 1321 | qg->excl -= sgn * num_bytes; |
| 1322 | qg->excl_cmpr -= sgn * num_bytes; |
| 1323 | qgroup_dirty(fs_info, qg); |
| 1324 | } |
| 1325 | |
| 1326 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1327 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1328 | (uintptr_t)glist->group, |
| 1329 | GFP_ATOMIC); |
| 1330 | if (ret < 0) |
| 1331 | return ret; |
| 1332 | } |
| 1333 | } |
| 1334 | } |
| 1335 | |
| 1336 | return 0; |
| 1337 | } |
| 1338 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1339 | /* |
| 1340 | * btrfs_qgroup_account_ref is called for every ref that is added to or deleted |
| 1341 | * from the fs. First, all roots referencing the extent are searched, and |
| 1342 | * then the space is accounted accordingly to the different roots. The |
| 1343 | * accounting algorithm works in 3 steps documented inline. |
| 1344 | */ |
| 1345 | int btrfs_qgroup_account_ref(struct btrfs_trans_handle *trans, |
| 1346 | struct btrfs_fs_info *fs_info, |
| 1347 | struct btrfs_delayed_ref_node *node, |
| 1348 | struct btrfs_delayed_extent_op *extent_op) |
| 1349 | { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1350 | struct btrfs_root *quota_root; |
| 1351 | u64 ref_root; |
| 1352 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1353 | struct ulist *roots = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1354 | u64 seq; |
| 1355 | int ret = 0; |
| 1356 | int sgn; |
| 1357 | |
| 1358 | if (!fs_info->quota_enabled) |
| 1359 | return 0; |
| 1360 | |
| 1361 | BUG_ON(!fs_info->quota_root); |
| 1362 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1363 | if (node->type == BTRFS_TREE_BLOCK_REF_KEY || |
| 1364 | node->type == BTRFS_SHARED_BLOCK_REF_KEY) { |
| 1365 | struct btrfs_delayed_tree_ref *ref; |
| 1366 | ref = btrfs_delayed_node_to_tree_ref(node); |
| 1367 | ref_root = ref->root; |
| 1368 | } else if (node->type == BTRFS_EXTENT_DATA_REF_KEY || |
| 1369 | node->type == BTRFS_SHARED_DATA_REF_KEY) { |
| 1370 | struct btrfs_delayed_data_ref *ref; |
| 1371 | ref = btrfs_delayed_node_to_data_ref(node); |
| 1372 | ref_root = ref->root; |
| 1373 | } else { |
| 1374 | BUG(); |
| 1375 | } |
| 1376 | |
| 1377 | if (!is_fstree(ref_root)) { |
| 1378 | /* |
| 1379 | * non-fs-trees are not being accounted |
| 1380 | */ |
| 1381 | return 0; |
| 1382 | } |
| 1383 | |
| 1384 | switch (node->action) { |
| 1385 | case BTRFS_ADD_DELAYED_REF: |
| 1386 | case BTRFS_ADD_DELAYED_EXTENT: |
| 1387 | sgn = 1; |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1388 | seq = btrfs_tree_mod_seq_prev(node->seq); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1389 | break; |
| 1390 | case BTRFS_DROP_DELAYED_REF: |
| 1391 | sgn = -1; |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1392 | seq = node->seq; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1393 | break; |
| 1394 | case BTRFS_UPDATE_DELAYED_HEAD: |
| 1395 | return 0; |
| 1396 | default: |
| 1397 | BUG(); |
| 1398 | } |
| 1399 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1400 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 1401 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { |
| 1402 | if (fs_info->qgroup_rescan_progress.objectid <= node->bytenr) { |
| 1403 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1404 | return 0; |
| 1405 | } |
| 1406 | } |
| 1407 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1408 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1409 | /* |
| 1410 | * the delayed ref sequence number we pass depends on the direction of |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1411 | * the operation. for add operations, we pass |
| 1412 | * tree_mod_log_prev_seq(node->seq) to skip |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1413 | * the delayed ref's current sequence number, because we need the state |
| 1414 | * of the tree before the add operation. for delete operations, we pass |
| 1415 | * (node->seq) to include the delayed ref's current sequence number, |
| 1416 | * because we need the state of the tree after the delete operation. |
| 1417 | */ |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1418 | ret = btrfs_find_all_roots(trans, fs_info, node->bytenr, seq, &roots); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1419 | if (ret < 0) |
Wang Shilong | a797502 | 2013-03-25 11:08:23 +0000 | [diff] [blame] | 1420 | return ret; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1421 | |
| 1422 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1423 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1424 | quota_root = fs_info->quota_root; |
| 1425 | if (!quota_root) |
| 1426 | goto unlock; |
| 1427 | |
| 1428 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1429 | if (!qgroup) |
| 1430 | goto unlock; |
| 1431 | |
| 1432 | /* |
| 1433 | * step 1: for each old ref, visit all nodes once and inc refcnt |
| 1434 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1435 | ulist_reinit(fs_info->qgroup_ulist); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1436 | seq = fs_info->qgroup_seq; |
| 1437 | fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ |
| 1438 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1439 | ret = qgroup_account_ref_step1(fs_info, roots, fs_info->qgroup_ulist, |
| 1440 | seq); |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1441 | if (ret) |
| 1442 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1443 | |
| 1444 | /* |
| 1445 | * step 2: walk from the new root |
| 1446 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1447 | ret = qgroup_account_ref_step2(fs_info, roots, fs_info->qgroup_ulist, |
| 1448 | seq, sgn, node->num_bytes, qgroup); |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1449 | if (ret) |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1450 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1451 | |
| 1452 | /* |
| 1453 | * step 3: walk again from old refs |
| 1454 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1455 | ret = qgroup_account_ref_step3(fs_info, roots, fs_info->qgroup_ulist, |
| 1456 | seq, sgn, node->num_bytes); |
Jan Schmidt | 46b665c | 2013-04-25 16:04:50 +0000 | [diff] [blame] | 1457 | if (ret) |
| 1458 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1459 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1460 | unlock: |
| 1461 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1462 | ulist_free(roots); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1463 | |
| 1464 | return ret; |
| 1465 | } |
| 1466 | |
| 1467 | /* |
| 1468 | * called from commit_transaction. Writes all changed qgroups to disk. |
| 1469 | */ |
| 1470 | int btrfs_run_qgroups(struct btrfs_trans_handle *trans, |
| 1471 | struct btrfs_fs_info *fs_info) |
| 1472 | { |
| 1473 | struct btrfs_root *quota_root = fs_info->quota_root; |
| 1474 | int ret = 0; |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1475 | int start_rescan_worker = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1476 | |
| 1477 | if (!quota_root) |
| 1478 | goto out; |
| 1479 | |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1480 | if (!fs_info->quota_enabled && fs_info->pending_quota_state) |
| 1481 | start_rescan_worker = 1; |
| 1482 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1483 | fs_info->quota_enabled = fs_info->pending_quota_state; |
| 1484 | |
| 1485 | spin_lock(&fs_info->qgroup_lock); |
| 1486 | while (!list_empty(&fs_info->dirty_qgroups)) { |
| 1487 | struct btrfs_qgroup *qgroup; |
| 1488 | qgroup = list_first_entry(&fs_info->dirty_qgroups, |
| 1489 | struct btrfs_qgroup, dirty); |
| 1490 | list_del_init(&qgroup->dirty); |
| 1491 | spin_unlock(&fs_info->qgroup_lock); |
| 1492 | ret = update_qgroup_info_item(trans, quota_root, qgroup); |
| 1493 | if (ret) |
| 1494 | fs_info->qgroup_flags |= |
| 1495 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1496 | spin_lock(&fs_info->qgroup_lock); |
| 1497 | } |
| 1498 | if (fs_info->quota_enabled) |
| 1499 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON; |
| 1500 | else |
| 1501 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON; |
| 1502 | spin_unlock(&fs_info->qgroup_lock); |
| 1503 | |
| 1504 | ret = update_qgroup_status_item(trans, fs_info, quota_root); |
| 1505 | if (ret) |
| 1506 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1507 | |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1508 | if (!ret && start_rescan_worker) { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 1509 | ret = qgroup_rescan_init(fs_info, 0, 1); |
| 1510 | if (!ret) { |
| 1511 | qgroup_rescan_zero_tracking(fs_info); |
| 1512 | btrfs_queue_worker(&fs_info->qgroup_rescan_workers, |
| 1513 | &fs_info->qgroup_rescan_work); |
| 1514 | } |
Jan Schmidt | 3d7b5a2 | 2013-04-25 16:04:52 +0000 | [diff] [blame] | 1515 | ret = 0; |
| 1516 | } |
| 1517 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1518 | out: |
| 1519 | |
| 1520 | return ret; |
| 1521 | } |
| 1522 | |
| 1523 | /* |
| 1524 | * copy the acounting information between qgroups. This is necessary when a |
| 1525 | * snapshot or a subvolume is created |
| 1526 | */ |
| 1527 | int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, |
| 1528 | struct btrfs_fs_info *fs_info, u64 srcid, u64 objectid, |
| 1529 | struct btrfs_qgroup_inherit *inherit) |
| 1530 | { |
| 1531 | int ret = 0; |
| 1532 | int i; |
| 1533 | u64 *i_qgroups; |
| 1534 | struct btrfs_root *quota_root = fs_info->quota_root; |
| 1535 | struct btrfs_qgroup *srcgroup; |
| 1536 | struct btrfs_qgroup *dstgroup; |
| 1537 | u32 level_size = 0; |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 1538 | u64 nums; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1539 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1540 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1541 | if (!fs_info->quota_enabled) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1542 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1543 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1544 | if (!quota_root) { |
| 1545 | ret = -EINVAL; |
| 1546 | goto out; |
| 1547 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1548 | |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 1549 | if (inherit) { |
| 1550 | i_qgroups = (u64 *)(inherit + 1); |
| 1551 | nums = inherit->num_qgroups + 2 * inherit->num_ref_copies + |
| 1552 | 2 * inherit->num_excl_copies; |
| 1553 | for (i = 0; i < nums; ++i) { |
| 1554 | srcgroup = find_qgroup_rb(fs_info, *i_qgroups); |
| 1555 | if (!srcgroup) { |
| 1556 | ret = -EINVAL; |
| 1557 | goto out; |
| 1558 | } |
| 1559 | ++i_qgroups; |
| 1560 | } |
| 1561 | } |
| 1562 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1563 | /* |
| 1564 | * create a tracking group for the subvol itself |
| 1565 | */ |
| 1566 | ret = add_qgroup_item(trans, quota_root, objectid); |
| 1567 | if (ret) |
| 1568 | goto out; |
| 1569 | |
| 1570 | if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) { |
| 1571 | ret = update_qgroup_limit_item(trans, quota_root, objectid, |
| 1572 | inherit->lim.flags, |
| 1573 | inherit->lim.max_rfer, |
| 1574 | inherit->lim.max_excl, |
| 1575 | inherit->lim.rsv_rfer, |
| 1576 | inherit->lim.rsv_excl); |
| 1577 | if (ret) |
| 1578 | goto out; |
| 1579 | } |
| 1580 | |
| 1581 | if (srcid) { |
| 1582 | struct btrfs_root *srcroot; |
| 1583 | struct btrfs_key srckey; |
| 1584 | int srcroot_level; |
| 1585 | |
| 1586 | srckey.objectid = srcid; |
| 1587 | srckey.type = BTRFS_ROOT_ITEM_KEY; |
| 1588 | srckey.offset = (u64)-1; |
| 1589 | srcroot = btrfs_read_fs_root_no_name(fs_info, &srckey); |
| 1590 | if (IS_ERR(srcroot)) { |
| 1591 | ret = PTR_ERR(srcroot); |
| 1592 | goto out; |
| 1593 | } |
| 1594 | |
| 1595 | rcu_read_lock(); |
| 1596 | srcroot_level = btrfs_header_level(srcroot->node); |
| 1597 | level_size = btrfs_level_size(srcroot, srcroot_level); |
| 1598 | rcu_read_unlock(); |
| 1599 | } |
| 1600 | |
| 1601 | /* |
| 1602 | * add qgroup to all inherited groups |
| 1603 | */ |
| 1604 | if (inherit) { |
| 1605 | i_qgroups = (u64 *)(inherit + 1); |
| 1606 | for (i = 0; i < inherit->num_qgroups; ++i) { |
| 1607 | ret = add_qgroup_relation_item(trans, quota_root, |
| 1608 | objectid, *i_qgroups); |
| 1609 | if (ret) |
| 1610 | goto out; |
| 1611 | ret = add_qgroup_relation_item(trans, quota_root, |
| 1612 | *i_qgroups, objectid); |
| 1613 | if (ret) |
| 1614 | goto out; |
| 1615 | ++i_qgroups; |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | |
| 1620 | spin_lock(&fs_info->qgroup_lock); |
| 1621 | |
| 1622 | dstgroup = add_qgroup_rb(fs_info, objectid); |
Dan Carpenter | 57a5a88 | 2012-07-30 02:15:43 -0600 | [diff] [blame] | 1623 | if (IS_ERR(dstgroup)) { |
| 1624 | ret = PTR_ERR(dstgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1625 | goto unlock; |
Dan Carpenter | 57a5a88 | 2012-07-30 02:15:43 -0600 | [diff] [blame] | 1626 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1627 | |
| 1628 | if (srcid) { |
| 1629 | srcgroup = find_qgroup_rb(fs_info, srcid); |
Chris Mason | f3a87f1 | 2012-09-14 20:06:30 -0400 | [diff] [blame] | 1630 | if (!srcgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1631 | goto unlock; |
| 1632 | dstgroup->rfer = srcgroup->rfer - level_size; |
| 1633 | dstgroup->rfer_cmpr = srcgroup->rfer_cmpr - level_size; |
| 1634 | srcgroup->excl = level_size; |
| 1635 | srcgroup->excl_cmpr = level_size; |
| 1636 | qgroup_dirty(fs_info, dstgroup); |
| 1637 | qgroup_dirty(fs_info, srcgroup); |
| 1638 | } |
| 1639 | |
Chris Mason | f3a87f1 | 2012-09-14 20:06:30 -0400 | [diff] [blame] | 1640 | if (!inherit) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1641 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1642 | |
| 1643 | i_qgroups = (u64 *)(inherit + 1); |
| 1644 | for (i = 0; i < inherit->num_qgroups; ++i) { |
| 1645 | ret = add_relation_rb(quota_root->fs_info, objectid, |
| 1646 | *i_qgroups); |
| 1647 | if (ret) |
| 1648 | goto unlock; |
| 1649 | ++i_qgroups; |
| 1650 | } |
| 1651 | |
| 1652 | for (i = 0; i < inherit->num_ref_copies; ++i) { |
| 1653 | struct btrfs_qgroup *src; |
| 1654 | struct btrfs_qgroup *dst; |
| 1655 | |
| 1656 | src = find_qgroup_rb(fs_info, i_qgroups[0]); |
| 1657 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); |
| 1658 | |
| 1659 | if (!src || !dst) { |
| 1660 | ret = -EINVAL; |
| 1661 | goto unlock; |
| 1662 | } |
| 1663 | |
| 1664 | dst->rfer = src->rfer - level_size; |
| 1665 | dst->rfer_cmpr = src->rfer_cmpr - level_size; |
| 1666 | i_qgroups += 2; |
| 1667 | } |
| 1668 | for (i = 0; i < inherit->num_excl_copies; ++i) { |
| 1669 | struct btrfs_qgroup *src; |
| 1670 | struct btrfs_qgroup *dst; |
| 1671 | |
| 1672 | src = find_qgroup_rb(fs_info, i_qgroups[0]); |
| 1673 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); |
| 1674 | |
| 1675 | if (!src || !dst) { |
| 1676 | ret = -EINVAL; |
| 1677 | goto unlock; |
| 1678 | } |
| 1679 | |
| 1680 | dst->excl = src->excl + level_size; |
| 1681 | dst->excl_cmpr = src->excl_cmpr + level_size; |
| 1682 | i_qgroups += 2; |
| 1683 | } |
| 1684 | |
| 1685 | unlock: |
| 1686 | spin_unlock(&fs_info->qgroup_lock); |
| 1687 | out: |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1688 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1689 | return ret; |
| 1690 | } |
| 1691 | |
| 1692 | /* |
| 1693 | * reserve some space for a qgroup and all its parents. The reservation takes |
| 1694 | * place with start_transaction or dealloc_reserve, similar to ENOSPC |
| 1695 | * accounting. If not enough space is available, EDQUOT is returned. |
| 1696 | * We assume that the requested space is new for all qgroups. |
| 1697 | */ |
| 1698 | int btrfs_qgroup_reserve(struct btrfs_root *root, u64 num_bytes) |
| 1699 | { |
| 1700 | struct btrfs_root *quota_root; |
| 1701 | struct btrfs_qgroup *qgroup; |
| 1702 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 1703 | u64 ref_root = root->root_key.objectid; |
| 1704 | int ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1705 | struct ulist_node *unode; |
| 1706 | struct ulist_iterator uiter; |
| 1707 | |
| 1708 | if (!is_fstree(ref_root)) |
| 1709 | return 0; |
| 1710 | |
| 1711 | if (num_bytes == 0) |
| 1712 | return 0; |
| 1713 | |
| 1714 | spin_lock(&fs_info->qgroup_lock); |
| 1715 | quota_root = fs_info->quota_root; |
| 1716 | if (!quota_root) |
| 1717 | goto out; |
| 1718 | |
| 1719 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1720 | if (!qgroup) |
| 1721 | goto out; |
| 1722 | |
| 1723 | /* |
| 1724 | * in a first step, we check all affected qgroups if any limits would |
| 1725 | * be exceeded |
| 1726 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1727 | ulist_reinit(fs_info->qgroup_ulist); |
| 1728 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1729 | (uintptr_t)qgroup, GFP_ATOMIC); |
| 1730 | if (ret < 0) |
| 1731 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1732 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1733 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1734 | struct btrfs_qgroup *qg; |
| 1735 | struct btrfs_qgroup_list *glist; |
| 1736 | |
Jan Schmidt | 995e01b | 2012-08-13 02:52:38 -0600 | [diff] [blame] | 1737 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1738 | |
| 1739 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) && |
Wang Shilong | b4fcd6b | 2013-04-15 12:56:49 +0000 | [diff] [blame] | 1740 | qg->reserved + (s64)qg->rfer + num_bytes > |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1741 | qg->max_rfer) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1742 | ret = -EDQUOT; |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1743 | goto out; |
| 1744 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1745 | |
| 1746 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) && |
Wang Shilong | b4fcd6b | 2013-04-15 12:56:49 +0000 | [diff] [blame] | 1747 | qg->reserved + (s64)qg->excl + num_bytes > |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1748 | qg->max_excl) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1749 | ret = -EDQUOT; |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 1750 | goto out; |
| 1751 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1752 | |
| 1753 | list_for_each_entry(glist, &qg->groups, next_group) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1754 | ret = ulist_add(fs_info->qgroup_ulist, |
| 1755 | glist->group->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1756 | (uintptr_t)glist->group, GFP_ATOMIC); |
| 1757 | if (ret < 0) |
| 1758 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1759 | } |
| 1760 | } |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1761 | ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1762 | /* |
| 1763 | * no limits exceeded, now record the reservation into all qgroups |
| 1764 | */ |
| 1765 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1766 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1767 | struct btrfs_qgroup *qg; |
| 1768 | |
Jan Schmidt | 995e01b | 2012-08-13 02:52:38 -0600 | [diff] [blame] | 1769 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1770 | |
| 1771 | qg->reserved += num_bytes; |
| 1772 | } |
| 1773 | |
| 1774 | out: |
| 1775 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1776 | return ret; |
| 1777 | } |
| 1778 | |
| 1779 | void btrfs_qgroup_free(struct btrfs_root *root, u64 num_bytes) |
| 1780 | { |
| 1781 | struct btrfs_root *quota_root; |
| 1782 | struct btrfs_qgroup *qgroup; |
| 1783 | struct btrfs_fs_info *fs_info = root->fs_info; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1784 | struct ulist_node *unode; |
| 1785 | struct ulist_iterator uiter; |
| 1786 | u64 ref_root = root->root_key.objectid; |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1787 | int ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1788 | |
| 1789 | if (!is_fstree(ref_root)) |
| 1790 | return; |
| 1791 | |
| 1792 | if (num_bytes == 0) |
| 1793 | return; |
| 1794 | |
| 1795 | spin_lock(&fs_info->qgroup_lock); |
| 1796 | |
| 1797 | quota_root = fs_info->quota_root; |
| 1798 | if (!quota_root) |
| 1799 | goto out; |
| 1800 | |
| 1801 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1802 | if (!qgroup) |
| 1803 | goto out; |
| 1804 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1805 | ulist_reinit(fs_info->qgroup_ulist); |
| 1806 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1807 | (uintptr_t)qgroup, GFP_ATOMIC); |
| 1808 | if (ret < 0) |
| 1809 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1810 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1811 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1812 | struct btrfs_qgroup *qg; |
| 1813 | struct btrfs_qgroup_list *glist; |
| 1814 | |
Jan Schmidt | 995e01b | 2012-08-13 02:52:38 -0600 | [diff] [blame] | 1815 | qg = (struct btrfs_qgroup *)(uintptr_t)unode->aux; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1816 | |
| 1817 | qg->reserved -= num_bytes; |
| 1818 | |
| 1819 | list_for_each_entry(glist, &qg->groups, next_group) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1820 | ret = ulist_add(fs_info->qgroup_ulist, |
| 1821 | glist->group->qgroupid, |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 1822 | (uintptr_t)glist->group, GFP_ATOMIC); |
| 1823 | if (ret < 0) |
| 1824 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1825 | } |
| 1826 | } |
| 1827 | |
| 1828 | out: |
| 1829 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1830 | } |
| 1831 | |
| 1832 | void assert_qgroups_uptodate(struct btrfs_trans_handle *trans) |
| 1833 | { |
| 1834 | if (list_empty(&trans->qgroup_ref_list) && !trans->delayed_ref_elem.seq) |
| 1835 | return; |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 1836 | btrfs_err(trans->root->fs_info, |
| 1837 | "qgroups not uptodate in trans handle %p: list is%s empty, " |
| 1838 | "seq is %#x.%x", |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1839 | trans, list_empty(&trans->qgroup_ref_list) ? "" : " not", |
Jan Schmidt | fc36ed7e | 2013-04-24 16:57:33 +0000 | [diff] [blame] | 1840 | (u32)(trans->delayed_ref_elem.seq >> 32), |
| 1841 | (u32)trans->delayed_ref_elem.seq); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1842 | BUG(); |
| 1843 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1844 | |
| 1845 | /* |
| 1846 | * returns < 0 on error, 0 when more leafs are to be scanned. |
| 1847 | * returns 1 when done, 2 when done and FLAG_INCONSISTENT was cleared. |
| 1848 | */ |
| 1849 | static int |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 1850 | 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] | 1851 | struct btrfs_trans_handle *trans, struct ulist *tmp, |
| 1852 | struct extent_buffer *scratch_leaf) |
| 1853 | { |
| 1854 | struct btrfs_key found; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1855 | struct ulist *roots = NULL; |
| 1856 | struct ulist_node *unode; |
| 1857 | struct ulist_iterator uiter; |
| 1858 | struct seq_list tree_mod_seq_elem = {}; |
| 1859 | u64 seq; |
| 1860 | int slot; |
| 1861 | int ret; |
| 1862 | |
| 1863 | path->leave_spinning = 1; |
| 1864 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 1865 | ret = btrfs_search_slot_for_read(fs_info->extent_root, |
| 1866 | &fs_info->qgroup_rescan_progress, |
| 1867 | path, 1, 0); |
| 1868 | |
| 1869 | pr_debug("current progress key (%llu %u %llu), search_slot ret %d\n", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 1870 | fs_info->qgroup_rescan_progress.objectid, |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1871 | fs_info->qgroup_rescan_progress.type, |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 1872 | fs_info->qgroup_rescan_progress.offset, ret); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1873 | |
| 1874 | if (ret) { |
| 1875 | /* |
| 1876 | * The rescan is about to end, we will not be scanning any |
| 1877 | * further blocks. We cannot unset the RESCAN flag here, because |
| 1878 | * we want to commit the transaction if everything went well. |
| 1879 | * To make the live accounting work in this phase, we set our |
| 1880 | * scan progress pointer such that every real extent objectid |
| 1881 | * will be smaller. |
| 1882 | */ |
| 1883 | fs_info->qgroup_rescan_progress.objectid = (u64)-1; |
| 1884 | btrfs_release_path(path); |
| 1885 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1886 | return ret; |
| 1887 | } |
| 1888 | |
| 1889 | btrfs_item_key_to_cpu(path->nodes[0], &found, |
| 1890 | btrfs_header_nritems(path->nodes[0]) - 1); |
| 1891 | fs_info->qgroup_rescan_progress.objectid = found.objectid + 1; |
| 1892 | |
| 1893 | btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem); |
| 1894 | memcpy(scratch_leaf, path->nodes[0], sizeof(*scratch_leaf)); |
| 1895 | slot = path->slots[0]; |
| 1896 | btrfs_release_path(path); |
| 1897 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 1898 | |
| 1899 | for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) { |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame^] | 1900 | u64 num_bytes; |
| 1901 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1902 | btrfs_item_key_to_cpu(scratch_leaf, &found, slot); |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame^] | 1903 | if (found.type != BTRFS_EXTENT_ITEM_KEY && |
| 1904 | found.type != BTRFS_METADATA_ITEM_KEY) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1905 | continue; |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame^] | 1906 | if (found.type == BTRFS_METADATA_ITEM_KEY) |
| 1907 | num_bytes = fs_info->extent_root->leafsize; |
| 1908 | else |
| 1909 | num_bytes = found.offset; |
| 1910 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1911 | ret = btrfs_find_all_roots(trans, fs_info, found.objectid, |
| 1912 | tree_mod_seq_elem.seq, &roots); |
| 1913 | if (ret < 0) |
| 1914 | goto out; |
| 1915 | spin_lock(&fs_info->qgroup_lock); |
| 1916 | seq = fs_info->qgroup_seq; |
| 1917 | fs_info->qgroup_seq += roots->nnodes + 1; /* max refcnt */ |
| 1918 | |
| 1919 | ret = qgroup_account_ref_step1(fs_info, roots, tmp, seq); |
| 1920 | if (ret) { |
| 1921 | spin_unlock(&fs_info->qgroup_lock); |
| 1922 | ulist_free(roots); |
| 1923 | goto out; |
| 1924 | } |
| 1925 | |
| 1926 | /* |
| 1927 | * step2 of btrfs_qgroup_account_ref works from a single root, |
| 1928 | * we're doing all at once here. |
| 1929 | */ |
| 1930 | ulist_reinit(tmp); |
| 1931 | ULIST_ITER_INIT(&uiter); |
| 1932 | while ((unode = ulist_next(roots, &uiter))) { |
| 1933 | struct btrfs_qgroup *qg; |
| 1934 | |
| 1935 | qg = find_qgroup_rb(fs_info, unode->val); |
| 1936 | if (!qg) |
| 1937 | continue; |
| 1938 | |
| 1939 | ret = ulist_add(tmp, qg->qgroupid, (uintptr_t)qg, |
| 1940 | GFP_ATOMIC); |
| 1941 | if (ret < 0) { |
| 1942 | spin_unlock(&fs_info->qgroup_lock); |
| 1943 | ulist_free(roots); |
| 1944 | goto out; |
| 1945 | } |
| 1946 | } |
| 1947 | |
| 1948 | /* this loop is similar to step 2 of btrfs_qgroup_account_ref */ |
| 1949 | ULIST_ITER_INIT(&uiter); |
| 1950 | while ((unode = ulist_next(tmp, &uiter))) { |
| 1951 | struct btrfs_qgroup *qg; |
| 1952 | struct btrfs_qgroup_list *glist; |
| 1953 | |
| 1954 | qg = (struct btrfs_qgroup *)(uintptr_t) unode->aux; |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame^] | 1955 | qg->rfer += num_bytes; |
| 1956 | qg->rfer_cmpr += num_bytes; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1957 | WARN_ON(qg->tag >= seq); |
| 1958 | if (qg->refcnt - seq == roots->nnodes) { |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame^] | 1959 | qg->excl += num_bytes; |
| 1960 | qg->excl_cmpr += num_bytes; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1961 | } |
| 1962 | qgroup_dirty(fs_info, qg); |
| 1963 | |
| 1964 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 1965 | ret = ulist_add(tmp, glist->group->qgroupid, |
| 1966 | (uintptr_t)glist->group, |
| 1967 | GFP_ATOMIC); |
| 1968 | if (ret < 0) { |
| 1969 | spin_unlock(&fs_info->qgroup_lock); |
| 1970 | ulist_free(roots); |
| 1971 | goto out; |
| 1972 | } |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | spin_unlock(&fs_info->qgroup_lock); |
| 1977 | ulist_free(roots); |
| 1978 | ret = 0; |
| 1979 | } |
| 1980 | |
| 1981 | out: |
| 1982 | btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem); |
| 1983 | |
| 1984 | return ret; |
| 1985 | } |
| 1986 | |
| 1987 | static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) |
| 1988 | { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 1989 | struct btrfs_fs_info *fs_info = container_of(work, struct btrfs_fs_info, |
| 1990 | qgroup_rescan_work); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1991 | struct btrfs_path *path; |
| 1992 | struct btrfs_trans_handle *trans = NULL; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1993 | struct ulist *tmp = NULL; |
| 1994 | struct extent_buffer *scratch_leaf = NULL; |
| 1995 | int err = -ENOMEM; |
| 1996 | |
| 1997 | path = btrfs_alloc_path(); |
| 1998 | if (!path) |
| 1999 | goto out; |
| 2000 | tmp = ulist_alloc(GFP_NOFS); |
| 2001 | if (!tmp) |
| 2002 | goto out; |
| 2003 | scratch_leaf = kmalloc(sizeof(*scratch_leaf), GFP_NOFS); |
| 2004 | if (!scratch_leaf) |
| 2005 | goto out; |
| 2006 | |
| 2007 | err = 0; |
| 2008 | while (!err) { |
| 2009 | trans = btrfs_start_transaction(fs_info->fs_root, 0); |
| 2010 | if (IS_ERR(trans)) { |
| 2011 | err = PTR_ERR(trans); |
| 2012 | break; |
| 2013 | } |
| 2014 | if (!fs_info->quota_enabled) { |
| 2015 | err = -EINTR; |
| 2016 | } else { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2017 | err = qgroup_rescan_leaf(fs_info, path, trans, |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2018 | tmp, scratch_leaf); |
| 2019 | } |
| 2020 | if (err > 0) |
| 2021 | btrfs_commit_transaction(trans, fs_info->fs_root); |
| 2022 | else |
| 2023 | btrfs_end_transaction(trans, fs_info->fs_root); |
| 2024 | } |
| 2025 | |
| 2026 | out: |
| 2027 | kfree(scratch_leaf); |
| 2028 | ulist_free(tmp); |
| 2029 | btrfs_free_path(path); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2030 | |
| 2031 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2032 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2033 | |
| 2034 | if (err == 2 && |
| 2035 | fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) { |
| 2036 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 2037 | } else if (err < 0) { |
| 2038 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 2039 | } |
| 2040 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2041 | |
| 2042 | if (err >= 0) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2043 | btrfs_info(fs_info, "qgroup scan completed%s", |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2044 | err == 2 ? " (inconsistency flag cleared)" : ""); |
| 2045 | } else { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2046 | btrfs_err(fs_info, "qgroup scan failed with %d", err); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2047 | } |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 2048 | |
| 2049 | complete_all(&fs_info->qgroup_rescan_completion); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2050 | } |
| 2051 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2052 | /* |
| 2053 | * Checks that (a) no rescan is running and (b) quota is enabled. Allocates all |
| 2054 | * memory required for the rescan context. |
| 2055 | */ |
| 2056 | static int |
| 2057 | qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid, |
| 2058 | int init_flags) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2059 | { |
| 2060 | int ret = 0; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2061 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2062 | if (!init_flags && |
| 2063 | (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) || |
| 2064 | !(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON))) { |
| 2065 | ret = -EINVAL; |
| 2066 | goto err; |
| 2067 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2068 | |
| 2069 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2070 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2071 | |
| 2072 | if (init_flags) { |
| 2073 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) |
| 2074 | ret = -EINPROGRESS; |
| 2075 | else if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) |
| 2076 | ret = -EINVAL; |
| 2077 | |
| 2078 | if (ret) { |
| 2079 | spin_unlock(&fs_info->qgroup_lock); |
| 2080 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2081 | goto err; |
| 2082 | } |
| 2083 | |
| 2084 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2085 | } |
| 2086 | |
| 2087 | memset(&fs_info->qgroup_rescan_progress, 0, |
| 2088 | sizeof(fs_info->qgroup_rescan_progress)); |
| 2089 | fs_info->qgroup_rescan_progress.objectid = progress_objectid; |
| 2090 | |
| 2091 | spin_unlock(&fs_info->qgroup_lock); |
| 2092 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2093 | |
| 2094 | init_completion(&fs_info->qgroup_rescan_completion); |
| 2095 | |
| 2096 | memset(&fs_info->qgroup_rescan_work, 0, |
| 2097 | sizeof(fs_info->qgroup_rescan_work)); |
| 2098 | fs_info->qgroup_rescan_work.func = btrfs_qgroup_rescan_worker; |
| 2099 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2100 | if (ret) { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2101 | err: |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 2102 | btrfs_info(fs_info, "qgroup_rescan_init failed with %d", ret); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2103 | return ret; |
| 2104 | } |
| 2105 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2106 | return 0; |
| 2107 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2108 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2109 | static void |
| 2110 | qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info) |
| 2111 | { |
| 2112 | struct rb_node *n; |
| 2113 | struct btrfs_qgroup *qgroup; |
| 2114 | |
| 2115 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2116 | /* clear all current qgroup tracking information */ |
| 2117 | for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) { |
| 2118 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 2119 | qgroup->rfer = 0; |
| 2120 | qgroup->rfer_cmpr = 0; |
| 2121 | qgroup->excl = 0; |
| 2122 | qgroup->excl_cmpr = 0; |
| 2123 | } |
| 2124 | spin_unlock(&fs_info->qgroup_lock); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2125 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2126 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2127 | int |
| 2128 | btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) |
| 2129 | { |
| 2130 | int ret = 0; |
| 2131 | struct btrfs_trans_handle *trans; |
| 2132 | |
| 2133 | ret = qgroup_rescan_init(fs_info, 0, 1); |
| 2134 | if (ret) |
| 2135 | return ret; |
| 2136 | |
| 2137 | /* |
| 2138 | * We have set the rescan_progress to 0, which means no more |
| 2139 | * delayed refs will be accounted by btrfs_qgroup_account_ref. |
| 2140 | * However, btrfs_qgroup_account_ref may be right after its call |
| 2141 | * to btrfs_find_all_roots, in which case it would still do the |
| 2142 | * accounting. |
| 2143 | * To solve this, we're committing the transaction, which will |
| 2144 | * ensure we run all delayed refs and only after that, we are |
| 2145 | * going to clear all tracking information for a clean start. |
| 2146 | */ |
| 2147 | |
| 2148 | trans = btrfs_join_transaction(fs_info->fs_root); |
| 2149 | if (IS_ERR(trans)) { |
| 2150 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2151 | return PTR_ERR(trans); |
| 2152 | } |
| 2153 | ret = btrfs_commit_transaction(trans, fs_info->fs_root); |
| 2154 | if (ret) { |
| 2155 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2156 | return ret; |
| 2157 | } |
| 2158 | |
| 2159 | qgroup_rescan_zero_tracking(fs_info); |
| 2160 | |
| 2161 | btrfs_queue_worker(&fs_info->qgroup_rescan_workers, |
| 2162 | &fs_info->qgroup_rescan_work); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 2163 | |
| 2164 | return 0; |
| 2165 | } |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 2166 | |
| 2167 | int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info) |
| 2168 | { |
| 2169 | int running; |
| 2170 | int ret = 0; |
| 2171 | |
| 2172 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2173 | spin_lock(&fs_info->qgroup_lock); |
| 2174 | running = fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 2175 | spin_unlock(&fs_info->qgroup_lock); |
| 2176 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2177 | |
| 2178 | if (running) |
| 2179 | ret = wait_for_completion_interruptible( |
| 2180 | &fs_info->qgroup_rescan_completion); |
| 2181 | |
| 2182 | return ret; |
| 2183 | } |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 2184 | |
| 2185 | /* |
| 2186 | * this is only called from open_ctree where we're still single threaded, thus |
| 2187 | * locking is omitted here. |
| 2188 | */ |
| 2189 | void |
| 2190 | btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info) |
| 2191 | { |
| 2192 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) |
| 2193 | btrfs_queue_worker(&fs_info->qgroup_rescan_workers, |
| 2194 | &fs_info->qgroup_rescan_work); |
| 2195 | } |