David Sterba | c1d7c51 | 2018-04-03 19:23:33 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2011 STRATO. All rights reserved. |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 4 | */ |
| 5 | |
| 6 | #include <linux/sched.h> |
| 7 | #include <linux/pagemap.h> |
| 8 | #include <linux/writeback.h> |
| 9 | #include <linux/blkdev.h> |
| 10 | #include <linux/rbtree.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/workqueue.h> |
Filipe Brandenburger | 55e301f | 2013-01-29 06:04:50 +0000 | [diff] [blame] | 13 | #include <linux/btrfs.h> |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 14 | #include <linux/sizes.h> |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 15 | |
| 16 | #include "ctree.h" |
| 17 | #include "transaction.h" |
| 18 | #include "disk-io.h" |
| 19 | #include "locking.h" |
| 20 | #include "ulist.h" |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 21 | #include "backref.h" |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 22 | #include "extent_io.h" |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 23 | #include "qgroup.h" |
Josef Bacik | aac0023 | 2019-06-20 15:37:44 -0400 | [diff] [blame] | 24 | #include "block-group.h" |
Qu Wenruo | e69bcee | 2015-04-17 10:23:16 +0800 | [diff] [blame] | 25 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 26 | /* TODO XXX FIXME |
| 27 | * - subvol delete -> delete when ref goes to 0? delete limits also? |
| 28 | * - reorganize keys |
| 29 | * - compressed |
| 30 | * - sync |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 31 | * - copy also limits on subvol creation |
| 32 | * - limit |
Andrea Gelmini | 52042d8 | 2018-11-28 12:05:13 +0100 | [diff] [blame] | 33 | * - caches for ulists |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 34 | * - performance benchmarks |
| 35 | * - check all ioctl parameters |
| 36 | */ |
| 37 | |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 38 | /* |
| 39 | * Helpers to access qgroup reservation |
| 40 | * |
| 41 | * Callers should ensure the lock context and type are valid |
| 42 | */ |
| 43 | |
| 44 | static u64 qgroup_rsv_total(const struct btrfs_qgroup *qgroup) |
| 45 | { |
| 46 | u64 ret = 0; |
| 47 | int i; |
| 48 | |
| 49 | for (i = 0; i < BTRFS_QGROUP_RSV_LAST; i++) |
| 50 | ret += qgroup->rsv.values[i]; |
| 51 | |
| 52 | return ret; |
| 53 | } |
| 54 | |
| 55 | #ifdef CONFIG_BTRFS_DEBUG |
| 56 | static const char *qgroup_rsv_type_str(enum btrfs_qgroup_rsv_type type) |
| 57 | { |
| 58 | if (type == BTRFS_QGROUP_RSV_DATA) |
| 59 | return "data"; |
Qu Wenruo | 733e03a | 2017-12-12 15:34:29 +0800 | [diff] [blame] | 60 | if (type == BTRFS_QGROUP_RSV_META_PERTRANS) |
| 61 | return "meta_pertrans"; |
| 62 | if (type == BTRFS_QGROUP_RSV_META_PREALLOC) |
| 63 | return "meta_prealloc"; |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 64 | return NULL; |
| 65 | } |
| 66 | #endif |
| 67 | |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 68 | static void qgroup_rsv_add(struct btrfs_fs_info *fs_info, |
| 69 | struct btrfs_qgroup *qgroup, u64 num_bytes, |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 70 | enum btrfs_qgroup_rsv_type type) |
| 71 | { |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 72 | trace_qgroup_update_reserve(fs_info, qgroup, num_bytes, type); |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 73 | qgroup->rsv.values[type] += num_bytes; |
| 74 | } |
| 75 | |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 76 | static void qgroup_rsv_release(struct btrfs_fs_info *fs_info, |
| 77 | struct btrfs_qgroup *qgroup, u64 num_bytes, |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 78 | enum btrfs_qgroup_rsv_type type) |
| 79 | { |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 80 | trace_qgroup_update_reserve(fs_info, qgroup, -(s64)num_bytes, type); |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 81 | if (qgroup->rsv.values[type] >= num_bytes) { |
| 82 | qgroup->rsv.values[type] -= num_bytes; |
| 83 | return; |
| 84 | } |
| 85 | #ifdef CONFIG_BTRFS_DEBUG |
| 86 | WARN_RATELIMIT(1, |
| 87 | "qgroup %llu %s reserved space underflow, have %llu to free %llu", |
| 88 | qgroup->qgroupid, qgroup_rsv_type_str(type), |
| 89 | qgroup->rsv.values[type], num_bytes); |
| 90 | #endif |
| 91 | qgroup->rsv.values[type] = 0; |
| 92 | } |
| 93 | |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 94 | static void qgroup_rsv_add_by_qgroup(struct btrfs_fs_info *fs_info, |
| 95 | struct btrfs_qgroup *dest, |
| 96 | struct btrfs_qgroup *src) |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 97 | { |
| 98 | int i; |
| 99 | |
| 100 | for (i = 0; i < BTRFS_QGROUP_RSV_LAST; i++) |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 101 | qgroup_rsv_add(fs_info, dest, src->rsv.values[i], i); |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 102 | } |
| 103 | |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 104 | static void qgroup_rsv_release_by_qgroup(struct btrfs_fs_info *fs_info, |
| 105 | struct btrfs_qgroup *dest, |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 106 | struct btrfs_qgroup *src) |
| 107 | { |
| 108 | int i; |
| 109 | |
| 110 | for (i = 0; i < BTRFS_QGROUP_RSV_LAST; i++) |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 111 | qgroup_rsv_release(fs_info, dest, src->rsv.values[i], i); |
Qu Wenruo | f59c034 | 2017-12-12 15:34:24 +0800 | [diff] [blame] | 112 | } |
| 113 | |
Qu Wenruo | 9c54213 | 2015-03-12 16:10:13 +0800 | [diff] [blame] | 114 | static void btrfs_qgroup_update_old_refcnt(struct btrfs_qgroup *qg, u64 seq, |
| 115 | int mod) |
| 116 | { |
| 117 | if (qg->old_refcnt < seq) |
| 118 | qg->old_refcnt = seq; |
| 119 | qg->old_refcnt += mod; |
| 120 | } |
| 121 | |
| 122 | static void btrfs_qgroup_update_new_refcnt(struct btrfs_qgroup *qg, u64 seq, |
| 123 | int mod) |
| 124 | { |
| 125 | if (qg->new_refcnt < seq) |
| 126 | qg->new_refcnt = seq; |
| 127 | qg->new_refcnt += mod; |
| 128 | } |
| 129 | |
| 130 | static inline u64 btrfs_qgroup_get_old_refcnt(struct btrfs_qgroup *qg, u64 seq) |
| 131 | { |
| 132 | if (qg->old_refcnt < seq) |
| 133 | return 0; |
| 134 | return qg->old_refcnt - seq; |
| 135 | } |
| 136 | |
| 137 | static inline u64 btrfs_qgroup_get_new_refcnt(struct btrfs_qgroup *qg, u64 seq) |
| 138 | { |
| 139 | if (qg->new_refcnt < seq) |
| 140 | return 0; |
| 141 | return qg->new_refcnt - seq; |
| 142 | } |
| 143 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 144 | /* |
| 145 | * glue structure to represent the relations between qgroups. |
| 146 | */ |
| 147 | struct btrfs_qgroup_list { |
| 148 | struct list_head next_group; |
| 149 | struct list_head next_member; |
| 150 | struct btrfs_qgroup *group; |
| 151 | struct btrfs_qgroup *member; |
| 152 | }; |
| 153 | |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 154 | static inline u64 qgroup_to_aux(struct btrfs_qgroup *qg) |
| 155 | { |
| 156 | return (u64)(uintptr_t)qg; |
| 157 | } |
| 158 | |
| 159 | static inline struct btrfs_qgroup* unode_aux_to_qgroup(struct ulist_node *n) |
| 160 | { |
| 161 | return (struct btrfs_qgroup *)(uintptr_t)n->aux; |
| 162 | } |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 163 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 164 | static int |
| 165 | qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid, |
| 166 | int init_flags); |
| 167 | static void qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 168 | |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 169 | /* must be called with qgroup_ioctl_lock held */ |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 170 | static struct btrfs_qgroup *find_qgroup_rb(struct btrfs_fs_info *fs_info, |
| 171 | u64 qgroupid) |
| 172 | { |
| 173 | struct rb_node *n = fs_info->qgroup_tree.rb_node; |
| 174 | struct btrfs_qgroup *qgroup; |
| 175 | |
| 176 | while (n) { |
| 177 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 178 | if (qgroup->qgroupid < qgroupid) |
| 179 | n = n->rb_left; |
| 180 | else if (qgroup->qgroupid > qgroupid) |
| 181 | n = n->rb_right; |
| 182 | else |
| 183 | return qgroup; |
| 184 | } |
| 185 | return NULL; |
| 186 | } |
| 187 | |
| 188 | /* must be called with qgroup_lock held */ |
| 189 | static struct btrfs_qgroup *add_qgroup_rb(struct btrfs_fs_info *fs_info, |
| 190 | u64 qgroupid) |
| 191 | { |
| 192 | struct rb_node **p = &fs_info->qgroup_tree.rb_node; |
| 193 | struct rb_node *parent = NULL; |
| 194 | struct btrfs_qgroup *qgroup; |
| 195 | |
| 196 | while (*p) { |
| 197 | parent = *p; |
| 198 | qgroup = rb_entry(parent, struct btrfs_qgroup, node); |
| 199 | |
| 200 | if (qgroup->qgroupid < qgroupid) |
| 201 | p = &(*p)->rb_left; |
| 202 | else if (qgroup->qgroupid > qgroupid) |
| 203 | p = &(*p)->rb_right; |
| 204 | else |
| 205 | return qgroup; |
| 206 | } |
| 207 | |
| 208 | qgroup = kzalloc(sizeof(*qgroup), GFP_ATOMIC); |
| 209 | if (!qgroup) |
| 210 | return ERR_PTR(-ENOMEM); |
| 211 | |
| 212 | qgroup->qgroupid = qgroupid; |
| 213 | INIT_LIST_HEAD(&qgroup->groups); |
| 214 | INIT_LIST_HEAD(&qgroup->members); |
| 215 | INIT_LIST_HEAD(&qgroup->dirty); |
| 216 | |
| 217 | rb_link_node(&qgroup->node, parent, p); |
| 218 | rb_insert_color(&qgroup->node, &fs_info->qgroup_tree); |
| 219 | |
| 220 | return qgroup; |
| 221 | } |
| 222 | |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 223 | static void __del_qgroup_rb(struct btrfs_qgroup *qgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 224 | { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 225 | struct btrfs_qgroup_list *list; |
| 226 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 227 | list_del(&qgroup->dirty); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 228 | while (!list_empty(&qgroup->groups)) { |
| 229 | list = list_first_entry(&qgroup->groups, |
| 230 | struct btrfs_qgroup_list, next_group); |
| 231 | list_del(&list->next_group); |
| 232 | list_del(&list->next_member); |
| 233 | kfree(list); |
| 234 | } |
| 235 | |
| 236 | while (!list_empty(&qgroup->members)) { |
| 237 | list = list_first_entry(&qgroup->members, |
| 238 | struct btrfs_qgroup_list, next_member); |
| 239 | list_del(&list->next_group); |
| 240 | list_del(&list->next_member); |
| 241 | kfree(list); |
| 242 | } |
| 243 | kfree(qgroup); |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 244 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 245 | |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 246 | /* must be called with qgroup_lock held */ |
| 247 | static int del_qgroup_rb(struct btrfs_fs_info *fs_info, u64 qgroupid) |
| 248 | { |
| 249 | struct btrfs_qgroup *qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 250 | |
| 251 | if (!qgroup) |
| 252 | return -ENOENT; |
| 253 | |
| 254 | rb_erase(&qgroup->node, &fs_info->qgroup_tree); |
| 255 | __del_qgroup_rb(qgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | /* must be called with qgroup_lock held */ |
| 260 | static int add_relation_rb(struct btrfs_fs_info *fs_info, |
| 261 | u64 memberid, u64 parentid) |
| 262 | { |
| 263 | struct btrfs_qgroup *member; |
| 264 | struct btrfs_qgroup *parent; |
| 265 | struct btrfs_qgroup_list *list; |
| 266 | |
| 267 | member = find_qgroup_rb(fs_info, memberid); |
| 268 | parent = find_qgroup_rb(fs_info, parentid); |
| 269 | if (!member || !parent) |
| 270 | return -ENOENT; |
| 271 | |
| 272 | list = kzalloc(sizeof(*list), GFP_ATOMIC); |
| 273 | if (!list) |
| 274 | return -ENOMEM; |
| 275 | |
| 276 | list->group = parent; |
| 277 | list->member = member; |
| 278 | list_add_tail(&list->next_group, &member->groups); |
| 279 | list_add_tail(&list->next_member, &parent->members); |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | /* must be called with qgroup_lock held */ |
| 285 | static int del_relation_rb(struct btrfs_fs_info *fs_info, |
| 286 | u64 memberid, u64 parentid) |
| 287 | { |
| 288 | struct btrfs_qgroup *member; |
| 289 | struct btrfs_qgroup *parent; |
| 290 | struct btrfs_qgroup_list *list; |
| 291 | |
| 292 | member = find_qgroup_rb(fs_info, memberid); |
| 293 | parent = find_qgroup_rb(fs_info, parentid); |
| 294 | if (!member || !parent) |
| 295 | return -ENOENT; |
| 296 | |
| 297 | list_for_each_entry(list, &member->groups, next_group) { |
| 298 | if (list->group == parent) { |
| 299 | list_del(&list->next_group); |
| 300 | list_del(&list->next_member); |
| 301 | kfree(list); |
| 302 | return 0; |
| 303 | } |
| 304 | } |
| 305 | return -ENOENT; |
| 306 | } |
| 307 | |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 308 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 309 | int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid, |
| 310 | u64 rfer, u64 excl) |
| 311 | { |
| 312 | struct btrfs_qgroup *qgroup; |
| 313 | |
| 314 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 315 | if (!qgroup) |
| 316 | return -EINVAL; |
| 317 | if (qgroup->rfer != rfer || qgroup->excl != excl) |
| 318 | return -EINVAL; |
| 319 | return 0; |
| 320 | } |
| 321 | #endif |
| 322 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 323 | /* |
| 324 | * The full config is read in one go, only called from open_ctree() |
| 325 | * It doesn't use any locking, as at this point we're still single-threaded |
| 326 | */ |
| 327 | int btrfs_read_qgroup_config(struct btrfs_fs_info *fs_info) |
| 328 | { |
| 329 | struct btrfs_key key; |
| 330 | struct btrfs_key found_key; |
| 331 | struct btrfs_root *quota_root = fs_info->quota_root; |
| 332 | struct btrfs_path *path = NULL; |
| 333 | struct extent_buffer *l; |
| 334 | int slot; |
| 335 | int ret = 0; |
| 336 | u64 flags = 0; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 337 | u64 rescan_progress = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 338 | |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 339 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 340 | return 0; |
| 341 | |
David Sterba | 323b88f | 2017-02-13 12:10:20 +0100 | [diff] [blame] | 342 | fs_info->qgroup_ulist = ulist_alloc(GFP_KERNEL); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 343 | if (!fs_info->qgroup_ulist) { |
| 344 | ret = -ENOMEM; |
| 345 | goto out; |
| 346 | } |
| 347 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 348 | path = btrfs_alloc_path(); |
| 349 | if (!path) { |
| 350 | ret = -ENOMEM; |
| 351 | goto out; |
| 352 | } |
| 353 | |
| 354 | /* default this to quota off, in case no status key is found */ |
| 355 | fs_info->qgroup_flags = 0; |
| 356 | |
| 357 | /* |
| 358 | * pass 1: read status, all qgroup infos and limits |
| 359 | */ |
| 360 | key.objectid = 0; |
| 361 | key.type = 0; |
| 362 | key.offset = 0; |
| 363 | ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 1); |
| 364 | if (ret) |
| 365 | goto out; |
| 366 | |
| 367 | while (1) { |
| 368 | struct btrfs_qgroup *qgroup; |
| 369 | |
| 370 | slot = path->slots[0]; |
| 371 | l = path->nodes[0]; |
| 372 | btrfs_item_key_to_cpu(l, &found_key, slot); |
| 373 | |
| 374 | if (found_key.type == BTRFS_QGROUP_STATUS_KEY) { |
| 375 | struct btrfs_qgroup_status_item *ptr; |
| 376 | |
| 377 | ptr = btrfs_item_ptr(l, slot, |
| 378 | struct btrfs_qgroup_status_item); |
| 379 | |
| 380 | if (btrfs_qgroup_status_version(l, ptr) != |
| 381 | BTRFS_QGROUP_STATUS_VERSION) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 382 | btrfs_err(fs_info, |
| 383 | "old qgroup version, quota disabled"); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 384 | goto out; |
| 385 | } |
| 386 | if (btrfs_qgroup_status_generation(l, ptr) != |
| 387 | fs_info->generation) { |
| 388 | flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 389 | btrfs_err(fs_info, |
Jeff Mahoney | 5d163e0 | 2016-09-20 10:05:00 -0400 | [diff] [blame] | 390 | "qgroup generation mismatch, marked as inconsistent"); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 391 | } |
| 392 | fs_info->qgroup_flags = btrfs_qgroup_status_flags(l, |
| 393 | ptr); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 394 | rescan_progress = btrfs_qgroup_status_rescan(l, ptr); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 395 | goto next1; |
| 396 | } |
| 397 | |
| 398 | if (found_key.type != BTRFS_QGROUP_INFO_KEY && |
| 399 | found_key.type != BTRFS_QGROUP_LIMIT_KEY) |
| 400 | goto next1; |
| 401 | |
| 402 | qgroup = find_qgroup_rb(fs_info, found_key.offset); |
| 403 | if ((qgroup && found_key.type == BTRFS_QGROUP_INFO_KEY) || |
| 404 | (!qgroup && found_key.type == BTRFS_QGROUP_LIMIT_KEY)) { |
Geert Uytterhoeven | d41e36a | 2015-07-06 15:38:11 +0200 | [diff] [blame] | 405 | btrfs_err(fs_info, "inconsistent qgroup config"); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 406 | flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 407 | } |
| 408 | if (!qgroup) { |
| 409 | qgroup = add_qgroup_rb(fs_info, found_key.offset); |
| 410 | if (IS_ERR(qgroup)) { |
| 411 | ret = PTR_ERR(qgroup); |
| 412 | goto out; |
| 413 | } |
| 414 | } |
| 415 | switch (found_key.type) { |
| 416 | case BTRFS_QGROUP_INFO_KEY: { |
| 417 | struct btrfs_qgroup_info_item *ptr; |
| 418 | |
| 419 | ptr = btrfs_item_ptr(l, slot, |
| 420 | struct btrfs_qgroup_info_item); |
| 421 | qgroup->rfer = btrfs_qgroup_info_rfer(l, ptr); |
| 422 | qgroup->rfer_cmpr = btrfs_qgroup_info_rfer_cmpr(l, ptr); |
| 423 | qgroup->excl = btrfs_qgroup_info_excl(l, ptr); |
| 424 | qgroup->excl_cmpr = btrfs_qgroup_info_excl_cmpr(l, ptr); |
| 425 | /* generation currently unused */ |
| 426 | break; |
| 427 | } |
| 428 | case BTRFS_QGROUP_LIMIT_KEY: { |
| 429 | struct btrfs_qgroup_limit_item *ptr; |
| 430 | |
| 431 | ptr = btrfs_item_ptr(l, slot, |
| 432 | struct btrfs_qgroup_limit_item); |
| 433 | qgroup->lim_flags = btrfs_qgroup_limit_flags(l, ptr); |
| 434 | qgroup->max_rfer = btrfs_qgroup_limit_max_rfer(l, ptr); |
| 435 | qgroup->max_excl = btrfs_qgroup_limit_max_excl(l, ptr); |
| 436 | qgroup->rsv_rfer = btrfs_qgroup_limit_rsv_rfer(l, ptr); |
| 437 | qgroup->rsv_excl = btrfs_qgroup_limit_rsv_excl(l, ptr); |
| 438 | break; |
| 439 | } |
| 440 | } |
| 441 | next1: |
| 442 | ret = btrfs_next_item(quota_root, path); |
| 443 | if (ret < 0) |
| 444 | goto out; |
| 445 | if (ret) |
| 446 | break; |
| 447 | } |
| 448 | btrfs_release_path(path); |
| 449 | |
| 450 | /* |
| 451 | * pass 2: read all qgroup relations |
| 452 | */ |
| 453 | key.objectid = 0; |
| 454 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 455 | key.offset = 0; |
| 456 | ret = btrfs_search_slot_for_read(quota_root, &key, path, 1, 0); |
| 457 | if (ret) |
| 458 | goto out; |
| 459 | while (1) { |
| 460 | slot = path->slots[0]; |
| 461 | l = path->nodes[0]; |
| 462 | btrfs_item_key_to_cpu(l, &found_key, slot); |
| 463 | |
| 464 | if (found_key.type != BTRFS_QGROUP_RELATION_KEY) |
| 465 | goto next2; |
| 466 | |
| 467 | if (found_key.objectid > found_key.offset) { |
| 468 | /* parent <- member, not needed to build config */ |
| 469 | /* FIXME should we omit the key completely? */ |
| 470 | goto next2; |
| 471 | } |
| 472 | |
| 473 | ret = add_relation_rb(fs_info, found_key.objectid, |
| 474 | found_key.offset); |
Arne Jansen | ff24858 | 2013-01-17 01:22:08 -0700 | [diff] [blame] | 475 | if (ret == -ENOENT) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 476 | btrfs_warn(fs_info, |
| 477 | "orphan qgroup relation 0x%llx->0x%llx", |
Geert Uytterhoeven | c1c9ff7 | 2013-08-20 13:20:07 +0200 | [diff] [blame] | 478 | found_key.objectid, found_key.offset); |
Arne Jansen | ff24858 | 2013-01-17 01:22:08 -0700 | [diff] [blame] | 479 | ret = 0; /* ignore the error */ |
| 480 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 481 | if (ret) |
| 482 | goto out; |
| 483 | next2: |
| 484 | ret = btrfs_next_item(quota_root, path); |
| 485 | if (ret < 0) |
| 486 | goto out; |
| 487 | if (ret) |
| 488 | break; |
| 489 | } |
| 490 | out: |
| 491 | fs_info->qgroup_flags |= flags; |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 492 | if (!(fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_ON)) |
| 493 | clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); |
| 494 | else if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN && |
| 495 | ret >= 0) |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 496 | ret = qgroup_rescan_init(fs_info, rescan_progress, 0); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 497 | btrfs_free_path(path); |
| 498 | |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 499 | if (ret < 0) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 500 | ulist_free(fs_info->qgroup_ulist); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 501 | fs_info->qgroup_ulist = NULL; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 502 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 503 | } |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 504 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 505 | return ret < 0 ? ret : 0; |
| 506 | } |
| 507 | |
| 508 | /* |
Wang Shilong | e685da1 | 2013-08-14 09:13:37 +0800 | [diff] [blame] | 509 | * This is called from close_ctree() or open_ctree() or btrfs_quota_disable(), |
| 510 | * first two are in single-threaded paths.And for the third one, we have set |
| 511 | * quota_root to be null with qgroup_lock held before, so it is safe to clean |
| 512 | * up the in-memory structures without qgroup_lock held. |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 513 | */ |
| 514 | void btrfs_free_qgroup_config(struct btrfs_fs_info *fs_info) |
| 515 | { |
| 516 | struct rb_node *n; |
| 517 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 518 | |
| 519 | while ((n = rb_first(&fs_info->qgroup_tree))) { |
| 520 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 521 | rb_erase(n, &fs_info->qgroup_tree); |
Wang Shilong | 4082bd3 | 2013-08-14 09:13:36 +0800 | [diff] [blame] | 522 | __del_qgroup_rb(qgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 523 | } |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 524 | /* |
Andrea Gelmini | 52042d8 | 2018-11-28 12:05:13 +0100 | [diff] [blame] | 525 | * We call btrfs_free_qgroup_config() when unmounting |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 526 | * filesystem and disabling quota, so we set qgroup_ulist |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 527 | * to be null here to avoid double free. |
| 528 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 529 | ulist_free(fs_info->qgroup_ulist); |
Wang Shilong | 1e7bac1 | 2013-07-13 21:02:54 +0800 | [diff] [blame] | 530 | fs_info->qgroup_ulist = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 531 | } |
| 532 | |
Lu Fengqi | 711169c | 2018-07-18 14:45:24 +0800 | [diff] [blame] | 533 | static int add_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src, |
| 534 | u64 dst) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 535 | { |
| 536 | int ret; |
Lu Fengqi | 711169c | 2018-07-18 14:45:24 +0800 | [diff] [blame] | 537 | struct btrfs_root *quota_root = trans->fs_info->quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 538 | struct btrfs_path *path; |
| 539 | struct btrfs_key key; |
| 540 | |
| 541 | path = btrfs_alloc_path(); |
| 542 | if (!path) |
| 543 | return -ENOMEM; |
| 544 | |
| 545 | key.objectid = src; |
| 546 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 547 | key.offset = dst; |
| 548 | |
| 549 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, 0); |
| 550 | |
| 551 | btrfs_mark_buffer_dirty(path->nodes[0]); |
| 552 | |
| 553 | btrfs_free_path(path); |
| 554 | return ret; |
| 555 | } |
| 556 | |
Lu Fengqi | 99d7f09 | 2018-07-18 14:45:25 +0800 | [diff] [blame] | 557 | static int del_qgroup_relation_item(struct btrfs_trans_handle *trans, u64 src, |
| 558 | u64 dst) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 559 | { |
| 560 | int ret; |
Lu Fengqi | 99d7f09 | 2018-07-18 14:45:25 +0800 | [diff] [blame] | 561 | struct btrfs_root *quota_root = trans->fs_info->quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 562 | struct btrfs_path *path; |
| 563 | struct btrfs_key key; |
| 564 | |
| 565 | path = btrfs_alloc_path(); |
| 566 | if (!path) |
| 567 | return -ENOMEM; |
| 568 | |
| 569 | key.objectid = src; |
| 570 | key.type = BTRFS_QGROUP_RELATION_KEY; |
| 571 | key.offset = dst; |
| 572 | |
| 573 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 574 | if (ret < 0) |
| 575 | goto out; |
| 576 | |
| 577 | if (ret > 0) { |
| 578 | ret = -ENOENT; |
| 579 | goto out; |
| 580 | } |
| 581 | |
| 582 | ret = btrfs_del_item(trans, quota_root, path); |
| 583 | out: |
| 584 | btrfs_free_path(path); |
| 585 | return ret; |
| 586 | } |
| 587 | |
| 588 | static int add_qgroup_item(struct btrfs_trans_handle *trans, |
| 589 | struct btrfs_root *quota_root, u64 qgroupid) |
| 590 | { |
| 591 | int ret; |
| 592 | struct btrfs_path *path; |
| 593 | struct btrfs_qgroup_info_item *qgroup_info; |
| 594 | struct btrfs_qgroup_limit_item *qgroup_limit; |
| 595 | struct extent_buffer *leaf; |
| 596 | struct btrfs_key key; |
| 597 | |
Jeff Mahoney | f5ee5c9 | 2016-06-21 09:52:41 -0400 | [diff] [blame] | 598 | if (btrfs_is_testing(quota_root->fs_info)) |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 599 | return 0; |
David Sterba | fccb84c | 2014-09-29 23:53:21 +0200 | [diff] [blame] | 600 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 601 | path = btrfs_alloc_path(); |
| 602 | if (!path) |
| 603 | return -ENOMEM; |
| 604 | |
| 605 | key.objectid = 0; |
| 606 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 607 | key.offset = qgroupid; |
| 608 | |
Mark Fasheh | 0b4699d | 2014-08-18 14:01:17 -0700 | [diff] [blame] | 609 | /* |
| 610 | * Avoid a transaction abort by catching -EEXIST here. In that |
| 611 | * case, we proceed by re-initializing the existing structure |
| 612 | * on disk. |
| 613 | */ |
| 614 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 615 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 616 | sizeof(*qgroup_info)); |
Mark Fasheh | 0b4699d | 2014-08-18 14:01:17 -0700 | [diff] [blame] | 617 | if (ret && ret != -EEXIST) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 618 | goto out; |
| 619 | |
| 620 | leaf = path->nodes[0]; |
| 621 | qgroup_info = btrfs_item_ptr(leaf, path->slots[0], |
| 622 | struct btrfs_qgroup_info_item); |
| 623 | btrfs_set_qgroup_info_generation(leaf, qgroup_info, trans->transid); |
| 624 | btrfs_set_qgroup_info_rfer(leaf, qgroup_info, 0); |
| 625 | btrfs_set_qgroup_info_rfer_cmpr(leaf, qgroup_info, 0); |
| 626 | btrfs_set_qgroup_info_excl(leaf, qgroup_info, 0); |
| 627 | btrfs_set_qgroup_info_excl_cmpr(leaf, qgroup_info, 0); |
| 628 | |
| 629 | btrfs_mark_buffer_dirty(leaf); |
| 630 | |
| 631 | btrfs_release_path(path); |
| 632 | |
| 633 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 634 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 635 | sizeof(*qgroup_limit)); |
Mark Fasheh | 0b4699d | 2014-08-18 14:01:17 -0700 | [diff] [blame] | 636 | if (ret && ret != -EEXIST) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 637 | goto out; |
| 638 | |
| 639 | leaf = path->nodes[0]; |
| 640 | qgroup_limit = btrfs_item_ptr(leaf, path->slots[0], |
| 641 | struct btrfs_qgroup_limit_item); |
| 642 | btrfs_set_qgroup_limit_flags(leaf, qgroup_limit, 0); |
| 643 | btrfs_set_qgroup_limit_max_rfer(leaf, qgroup_limit, 0); |
| 644 | btrfs_set_qgroup_limit_max_excl(leaf, qgroup_limit, 0); |
| 645 | btrfs_set_qgroup_limit_rsv_rfer(leaf, qgroup_limit, 0); |
| 646 | btrfs_set_qgroup_limit_rsv_excl(leaf, qgroup_limit, 0); |
| 647 | |
| 648 | btrfs_mark_buffer_dirty(leaf); |
| 649 | |
| 650 | ret = 0; |
| 651 | out: |
| 652 | btrfs_free_path(path); |
| 653 | return ret; |
| 654 | } |
| 655 | |
Lu Fengqi | 6910461 | 2018-07-18 14:45:26 +0800 | [diff] [blame] | 656 | static int del_qgroup_item(struct btrfs_trans_handle *trans, u64 qgroupid) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 657 | { |
| 658 | int ret; |
Lu Fengqi | 6910461 | 2018-07-18 14:45:26 +0800 | [diff] [blame] | 659 | struct btrfs_root *quota_root = trans->fs_info->quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 660 | struct btrfs_path *path; |
| 661 | struct btrfs_key key; |
| 662 | |
| 663 | path = btrfs_alloc_path(); |
| 664 | if (!path) |
| 665 | return -ENOMEM; |
| 666 | |
| 667 | key.objectid = 0; |
| 668 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 669 | key.offset = qgroupid; |
| 670 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 671 | if (ret < 0) |
| 672 | goto out; |
| 673 | |
| 674 | if (ret > 0) { |
| 675 | ret = -ENOENT; |
| 676 | goto out; |
| 677 | } |
| 678 | |
| 679 | ret = btrfs_del_item(trans, quota_root, path); |
| 680 | if (ret) |
| 681 | goto out; |
| 682 | |
| 683 | btrfs_release_path(path); |
| 684 | |
| 685 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
| 686 | ret = btrfs_search_slot(trans, quota_root, &key, path, -1, 1); |
| 687 | if (ret < 0) |
| 688 | goto out; |
| 689 | |
| 690 | if (ret > 0) { |
| 691 | ret = -ENOENT; |
| 692 | goto out; |
| 693 | } |
| 694 | |
| 695 | ret = btrfs_del_item(trans, quota_root, path); |
| 696 | |
| 697 | out: |
| 698 | btrfs_free_path(path); |
| 699 | return ret; |
| 700 | } |
| 701 | |
| 702 | static int update_qgroup_limit_item(struct btrfs_trans_handle *trans, |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 703 | struct btrfs_qgroup *qgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 704 | { |
Lu Fengqi | ac8a866 | 2018-07-18 14:45:27 +0800 | [diff] [blame] | 705 | struct btrfs_root *quota_root = trans->fs_info->quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 706 | struct btrfs_path *path; |
| 707 | struct btrfs_key key; |
| 708 | struct extent_buffer *l; |
| 709 | struct btrfs_qgroup_limit_item *qgroup_limit; |
| 710 | int ret; |
| 711 | int slot; |
| 712 | |
| 713 | key.objectid = 0; |
| 714 | key.type = BTRFS_QGROUP_LIMIT_KEY; |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 715 | key.offset = qgroup->qgroupid; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 716 | |
| 717 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 718 | if (!path) |
| 719 | return -ENOMEM; |
| 720 | |
Lu Fengqi | ac8a866 | 2018-07-18 14:45:27 +0800 | [diff] [blame] | 721 | ret = btrfs_search_slot(trans, quota_root, &key, path, 0, 1); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 722 | if (ret > 0) |
| 723 | ret = -ENOENT; |
| 724 | |
| 725 | if (ret) |
| 726 | goto out; |
| 727 | |
| 728 | l = path->nodes[0]; |
| 729 | slot = path->slots[0]; |
Valentina Giusti | a3df41e | 2013-11-04 22:34:29 +0100 | [diff] [blame] | 730 | qgroup_limit = btrfs_item_ptr(l, slot, struct btrfs_qgroup_limit_item); |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 731 | btrfs_set_qgroup_limit_flags(l, qgroup_limit, qgroup->lim_flags); |
| 732 | btrfs_set_qgroup_limit_max_rfer(l, qgroup_limit, qgroup->max_rfer); |
| 733 | btrfs_set_qgroup_limit_max_excl(l, qgroup_limit, qgroup->max_excl); |
| 734 | btrfs_set_qgroup_limit_rsv_rfer(l, qgroup_limit, qgroup->rsv_rfer); |
| 735 | btrfs_set_qgroup_limit_rsv_excl(l, qgroup_limit, qgroup->rsv_excl); |
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 | static int update_qgroup_info_item(struct btrfs_trans_handle *trans, |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 745 | struct btrfs_qgroup *qgroup) |
| 746 | { |
Lu Fengqi | 3e07e9a | 2018-07-18 14:45:28 +0800 | [diff] [blame] | 747 | struct btrfs_fs_info *fs_info = trans->fs_info; |
| 748 | struct btrfs_root *quota_root = fs_info->quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 749 | struct btrfs_path *path; |
| 750 | struct btrfs_key key; |
| 751 | struct extent_buffer *l; |
| 752 | struct btrfs_qgroup_info_item *qgroup_info; |
| 753 | int ret; |
| 754 | int slot; |
| 755 | |
Lu Fengqi | 3e07e9a | 2018-07-18 14:45:28 +0800 | [diff] [blame] | 756 | if (btrfs_is_testing(fs_info)) |
Josef Bacik | faa2dbf | 2014-05-07 17:06:09 -0400 | [diff] [blame] | 757 | return 0; |
David Sterba | fccb84c | 2014-09-29 23:53:21 +0200 | [diff] [blame] | 758 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 759 | key.objectid = 0; |
| 760 | key.type = BTRFS_QGROUP_INFO_KEY; |
| 761 | key.offset = qgroup->qgroupid; |
| 762 | |
| 763 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 764 | if (!path) |
| 765 | return -ENOMEM; |
| 766 | |
Lu Fengqi | 3e07e9a | 2018-07-18 14:45:28 +0800 | [diff] [blame] | 767 | ret = btrfs_search_slot(trans, quota_root, &key, path, 0, 1); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 768 | if (ret > 0) |
| 769 | ret = -ENOENT; |
| 770 | |
| 771 | if (ret) |
| 772 | goto out; |
| 773 | |
| 774 | l = path->nodes[0]; |
| 775 | slot = path->slots[0]; |
Valentina Giusti | a3df41e | 2013-11-04 22:34:29 +0100 | [diff] [blame] | 776 | qgroup_info = btrfs_item_ptr(l, slot, struct btrfs_qgroup_info_item); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 777 | btrfs_set_qgroup_info_generation(l, qgroup_info, trans->transid); |
| 778 | btrfs_set_qgroup_info_rfer(l, qgroup_info, qgroup->rfer); |
| 779 | btrfs_set_qgroup_info_rfer_cmpr(l, qgroup_info, qgroup->rfer_cmpr); |
| 780 | btrfs_set_qgroup_info_excl(l, qgroup_info, qgroup->excl); |
| 781 | btrfs_set_qgroup_info_excl_cmpr(l, qgroup_info, qgroup->excl_cmpr); |
| 782 | |
| 783 | btrfs_mark_buffer_dirty(l); |
| 784 | |
| 785 | out: |
| 786 | btrfs_free_path(path); |
| 787 | return ret; |
| 788 | } |
| 789 | |
Lu Fengqi | 2e980ac | 2018-07-18 14:45:29 +0800 | [diff] [blame] | 790 | static int update_qgroup_status_item(struct btrfs_trans_handle *trans) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 791 | { |
Lu Fengqi | 2e980ac | 2018-07-18 14:45:29 +0800 | [diff] [blame] | 792 | struct btrfs_fs_info *fs_info = trans->fs_info; |
| 793 | struct btrfs_root *quota_root = fs_info->quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 794 | struct btrfs_path *path; |
| 795 | struct btrfs_key key; |
| 796 | struct extent_buffer *l; |
| 797 | struct btrfs_qgroup_status_item *ptr; |
| 798 | int ret; |
| 799 | int slot; |
| 800 | |
| 801 | key.objectid = 0; |
| 802 | key.type = BTRFS_QGROUP_STATUS_KEY; |
| 803 | key.offset = 0; |
| 804 | |
| 805 | path = btrfs_alloc_path(); |
Wang Shilong | 84cbe2f | 2013-02-27 11:20:56 +0000 | [diff] [blame] | 806 | if (!path) |
| 807 | return -ENOMEM; |
| 808 | |
Lu Fengqi | 2e980ac | 2018-07-18 14:45:29 +0800 | [diff] [blame] | 809 | ret = btrfs_search_slot(trans, quota_root, &key, path, 0, 1); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 810 | if (ret > 0) |
| 811 | ret = -ENOENT; |
| 812 | |
| 813 | if (ret) |
| 814 | goto out; |
| 815 | |
| 816 | l = path->nodes[0]; |
| 817 | slot = path->slots[0]; |
| 818 | ptr = btrfs_item_ptr(l, slot, struct btrfs_qgroup_status_item); |
| 819 | btrfs_set_qgroup_status_flags(l, ptr, fs_info->qgroup_flags); |
| 820 | btrfs_set_qgroup_status_generation(l, ptr, trans->transid); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 821 | btrfs_set_qgroup_status_rescan(l, ptr, |
| 822 | fs_info->qgroup_rescan_progress.objectid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 823 | |
| 824 | btrfs_mark_buffer_dirty(l); |
| 825 | |
| 826 | out: |
| 827 | btrfs_free_path(path); |
| 828 | return ret; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * called with qgroup_lock held |
| 833 | */ |
| 834 | static int btrfs_clean_quota_tree(struct btrfs_trans_handle *trans, |
| 835 | struct btrfs_root *root) |
| 836 | { |
| 837 | struct btrfs_path *path; |
| 838 | struct btrfs_key key; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 839 | struct extent_buffer *leaf = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 840 | int ret; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 841 | int nr = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 842 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 843 | path = btrfs_alloc_path(); |
| 844 | if (!path) |
| 845 | return -ENOMEM; |
| 846 | |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 847 | path->leave_spinning = 1; |
| 848 | |
| 849 | key.objectid = 0; |
| 850 | key.offset = 0; |
| 851 | key.type = 0; |
| 852 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 853 | while (1) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 854 | ret = btrfs_search_slot(trans, root, &key, path, -1, 1); |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 855 | if (ret < 0) |
| 856 | goto out; |
| 857 | leaf = path->nodes[0]; |
| 858 | nr = btrfs_header_nritems(leaf); |
| 859 | if (!nr) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 860 | break; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 861 | /* |
| 862 | * delete the leaf one by one |
| 863 | * since the whole tree is going |
| 864 | * to be deleted. |
| 865 | */ |
| 866 | path->slots[0] = 0; |
| 867 | ret = btrfs_del_items(trans, root, path, 0, nr); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 868 | if (ret) |
| 869 | goto out; |
Wang Shilong | 06b3a86 | 2013-02-27 11:16:57 +0000 | [diff] [blame] | 870 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 871 | btrfs_release_path(path); |
| 872 | } |
| 873 | ret = 0; |
| 874 | out: |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 875 | btrfs_free_path(path); |
| 876 | return ret; |
| 877 | } |
| 878 | |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 879 | int btrfs_quota_enable(struct btrfs_fs_info *fs_info) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 880 | { |
| 881 | struct btrfs_root *quota_root; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 882 | struct btrfs_root *tree_root = fs_info->tree_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 883 | struct btrfs_path *path = NULL; |
| 884 | struct btrfs_qgroup_status_item *ptr; |
| 885 | struct extent_buffer *leaf; |
| 886 | struct btrfs_key key; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 887 | struct btrfs_key found_key; |
| 888 | struct btrfs_qgroup *qgroup = NULL; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 889 | struct btrfs_trans_handle *trans = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 890 | int ret = 0; |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 891 | int slot; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 892 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 893 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Nikolay Borisov | 5d23515 | 2018-01-31 10:52:04 +0200 | [diff] [blame] | 894 | if (fs_info->quota_root) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 895 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 896 | |
David Sterba | 7503b83 | 2018-12-19 19:47:37 +0100 | [diff] [blame] | 897 | fs_info->qgroup_ulist = ulist_alloc(GFP_KERNEL); |
| 898 | if (!fs_info->qgroup_ulist) { |
| 899 | ret = -ENOMEM; |
| 900 | goto out; |
| 901 | } |
| 902 | |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 903 | /* |
| 904 | * 1 for quota root item |
| 905 | * 1 for BTRFS_QGROUP_STATUS item |
| 906 | * |
| 907 | * Yet we also need 2*n items for a QGROUP_INFO/QGROUP_LIMIT items |
| 908 | * per subvolume. However those are not currently reserved since it |
| 909 | * would be a lot of overkill. |
| 910 | */ |
| 911 | trans = btrfs_start_transaction(tree_root, 2); |
| 912 | if (IS_ERR(trans)) { |
| 913 | ret = PTR_ERR(trans); |
| 914 | trans = NULL; |
| 915 | goto out; |
| 916 | } |
| 917 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 918 | /* |
| 919 | * initially create the quota tree |
| 920 | */ |
David Sterba | 9b7a244 | 2019-03-20 13:20:49 +0100 | [diff] [blame] | 921 | quota_root = btrfs_create_tree(trans, BTRFS_QUOTA_TREE_OBJECTID); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 922 | if (IS_ERR(quota_root)) { |
| 923 | ret = PTR_ERR(quota_root); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 924 | btrfs_abort_transaction(trans, ret); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 925 | goto out; |
| 926 | } |
| 927 | |
| 928 | path = btrfs_alloc_path(); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 929 | if (!path) { |
| 930 | ret = -ENOMEM; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 931 | btrfs_abort_transaction(trans, ret); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 932 | goto out_free_root; |
| 933 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 934 | |
| 935 | key.objectid = 0; |
| 936 | key.type = BTRFS_QGROUP_STATUS_KEY; |
| 937 | key.offset = 0; |
| 938 | |
| 939 | ret = btrfs_insert_empty_item(trans, quota_root, path, &key, |
| 940 | sizeof(*ptr)); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 941 | if (ret) { |
| 942 | btrfs_abort_transaction(trans, ret); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 943 | goto out_free_path; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 944 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 945 | |
| 946 | leaf = path->nodes[0]; |
| 947 | ptr = btrfs_item_ptr(leaf, path->slots[0], |
| 948 | struct btrfs_qgroup_status_item); |
| 949 | btrfs_set_qgroup_status_generation(leaf, ptr, trans->transid); |
| 950 | btrfs_set_qgroup_status_version(leaf, ptr, BTRFS_QGROUP_STATUS_VERSION); |
| 951 | fs_info->qgroup_flags = BTRFS_QGROUP_STATUS_FLAG_ON | |
| 952 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 953 | btrfs_set_qgroup_status_flags(leaf, ptr, fs_info->qgroup_flags); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 954 | btrfs_set_qgroup_status_rescan(leaf, ptr, 0); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 955 | |
| 956 | btrfs_mark_buffer_dirty(leaf); |
| 957 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 958 | key.objectid = 0; |
| 959 | key.type = BTRFS_ROOT_REF_KEY; |
| 960 | key.offset = 0; |
| 961 | |
| 962 | btrfs_release_path(path); |
| 963 | ret = btrfs_search_slot_for_read(tree_root, &key, path, 1, 0); |
| 964 | if (ret > 0) |
| 965 | goto out_add_root; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 966 | if (ret < 0) { |
| 967 | btrfs_abort_transaction(trans, ret); |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 968 | goto out_free_path; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 969 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 970 | |
| 971 | while (1) { |
| 972 | slot = path->slots[0]; |
| 973 | leaf = path->nodes[0]; |
| 974 | btrfs_item_key_to_cpu(leaf, &found_key, slot); |
| 975 | |
| 976 | if (found_key.type == BTRFS_ROOT_REF_KEY) { |
| 977 | ret = add_qgroup_item(trans, quota_root, |
| 978 | found_key.offset); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 979 | if (ret) { |
| 980 | btrfs_abort_transaction(trans, ret); |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 981 | goto out_free_path; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 982 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 983 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 984 | qgroup = add_qgroup_rb(fs_info, found_key.offset); |
| 985 | if (IS_ERR(qgroup)) { |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 986 | ret = PTR_ERR(qgroup); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 987 | btrfs_abort_transaction(trans, ret); |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 988 | goto out_free_path; |
| 989 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 990 | } |
| 991 | ret = btrfs_next_item(tree_root, path); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 992 | if (ret < 0) { |
| 993 | btrfs_abort_transaction(trans, ret); |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 994 | goto out_free_path; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 995 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 996 | if (ret) |
| 997 | break; |
| 998 | } |
| 999 | |
| 1000 | out_add_root: |
| 1001 | btrfs_release_path(path); |
| 1002 | ret = add_qgroup_item(trans, quota_root, BTRFS_FS_TREE_OBJECTID); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1003 | if (ret) { |
| 1004 | btrfs_abort_transaction(trans, ret); |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 1005 | goto out_free_path; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1006 | } |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 1007 | |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 1008 | qgroup = add_qgroup_rb(fs_info, BTRFS_FS_TREE_OBJECTID); |
| 1009 | if (IS_ERR(qgroup)) { |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 1010 | ret = PTR_ERR(qgroup); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1011 | btrfs_abort_transaction(trans, ret); |
Wang Shilong | 7708f02 | 2013-04-07 10:24:57 +0000 | [diff] [blame] | 1012 | goto out_free_path; |
| 1013 | } |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1014 | |
| 1015 | ret = btrfs_commit_transaction(trans); |
Dan Carpenter | b9b8a41 | 2018-08-20 11:25:33 +0300 | [diff] [blame] | 1016 | trans = NULL; |
| 1017 | if (ret) |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1018 | goto out_free_path; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1019 | |
Filipe Manana | 9a6f209 | 2018-11-19 14:15:36 +0000 | [diff] [blame] | 1020 | /* |
| 1021 | * Set quota enabled flag after committing the transaction, to avoid |
| 1022 | * deadlocks on fs_info->qgroup_ioctl_lock with concurrent snapshot |
| 1023 | * creation. |
| 1024 | */ |
| 1025 | spin_lock(&fs_info->qgroup_lock); |
| 1026 | fs_info->quota_root = quota_root; |
| 1027 | set_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); |
| 1028 | spin_unlock(&fs_info->qgroup_lock); |
| 1029 | |
Nikolay Borisov | 5d23515 | 2018-01-31 10:52:04 +0200 | [diff] [blame] | 1030 | ret = qgroup_rescan_init(fs_info, 0, 1); |
| 1031 | if (!ret) { |
| 1032 | qgroup_rescan_zero_tracking(fs_info); |
Qu Wenruo | d61acbb | 2020-02-07 13:38:20 +0800 | [diff] [blame^] | 1033 | fs_info->qgroup_rescan_running = true; |
Nikolay Borisov | 5d23515 | 2018-01-31 10:52:04 +0200 | [diff] [blame] | 1034 | btrfs_queue_work(fs_info->qgroup_rescan_workers, |
| 1035 | &fs_info->qgroup_rescan_work); |
| 1036 | } |
| 1037 | |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 1038 | out_free_path: |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1039 | btrfs_free_path(path); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 1040 | out_free_root: |
| 1041 | if (ret) { |
| 1042 | free_extent_buffer(quota_root->node); |
| 1043 | free_extent_buffer(quota_root->commit_root); |
Josef Bacik | 0024652 | 2020-01-24 09:33:01 -0500 | [diff] [blame] | 1044 | btrfs_put_root(quota_root); |
Tsutomu Itoh | 5b7ff5b | 2012-10-16 05:44:21 +0000 | [diff] [blame] | 1045 | } |
| 1046 | out: |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 1047 | if (ret) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 1048 | ulist_free(fs_info->qgroup_ulist); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 1049 | fs_info->qgroup_ulist = NULL; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1050 | if (trans) |
| 1051 | btrfs_end_transaction(trans); |
Jan Schmidt | eb1716a | 2013-05-28 15:47:23 +0000 | [diff] [blame] | 1052 | } |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1053 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1054 | return ret; |
| 1055 | } |
| 1056 | |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1057 | int btrfs_quota_disable(struct btrfs_fs_info *fs_info) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1058 | { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1059 | struct btrfs_root *quota_root; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1060 | struct btrfs_trans_handle *trans = NULL; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1061 | int ret = 0; |
| 1062 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1063 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 1064 | if (!fs_info->quota_root) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1065 | goto out; |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1066 | |
| 1067 | /* |
| 1068 | * 1 For the root item |
| 1069 | * |
| 1070 | * We should also reserve enough items for the quota tree deletion in |
| 1071 | * btrfs_clean_quota_tree but this is not done. |
| 1072 | */ |
| 1073 | trans = btrfs_start_transaction(fs_info->tree_root, 1); |
| 1074 | if (IS_ERR(trans)) { |
| 1075 | ret = PTR_ERR(trans); |
| 1076 | goto out; |
| 1077 | } |
| 1078 | |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 1079 | clear_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags); |
Jeff Mahoney | d06f23d | 2016-08-08 22:08:06 -0400 | [diff] [blame] | 1080 | btrfs_qgroup_wait_for_completion(fs_info, false); |
Justin Maggard | 967ef51 | 2015-11-06 10:36:42 -0800 | [diff] [blame] | 1081 | spin_lock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1082 | quota_root = fs_info->quota_root; |
| 1083 | fs_info->quota_root = NULL; |
Dongsheng Yang | 8ea0ec9 | 2015-02-27 16:24:26 +0800 | [diff] [blame] | 1084 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1085 | spin_unlock(&fs_info->qgroup_lock); |
| 1086 | |
Wang Shilong | e685da1 | 2013-08-14 09:13:37 +0800 | [diff] [blame] | 1087 | btrfs_free_qgroup_config(fs_info); |
| 1088 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1089 | ret = btrfs_clean_quota_tree(trans, quota_root); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1090 | if (ret) { |
| 1091 | btrfs_abort_transaction(trans, ret); |
| 1092 | goto end_trans; |
| 1093 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1094 | |
Lu Fengqi | ab9ce7d | 2018-08-01 11:32:27 +0800 | [diff] [blame] | 1095 | ret = btrfs_del_root(trans, "a_root->root_key); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1096 | if (ret) { |
| 1097 | btrfs_abort_transaction(trans, ret); |
| 1098 | goto end_trans; |
| 1099 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1100 | |
| 1101 | list_del("a_root->dirty_list); |
| 1102 | |
| 1103 | btrfs_tree_lock(quota_root->node); |
David Sterba | 6a884d7d | 2019-03-20 14:30:02 +0100 | [diff] [blame] | 1104 | btrfs_clean_tree_block(quota_root->node); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1105 | btrfs_tree_unlock(quota_root->node); |
| 1106 | btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1); |
| 1107 | |
| 1108 | free_extent_buffer(quota_root->node); |
| 1109 | free_extent_buffer(quota_root->commit_root); |
Josef Bacik | 0024652 | 2020-01-24 09:33:01 -0500 | [diff] [blame] | 1110 | btrfs_put_root(quota_root); |
Nikolay Borisov | 340f1aa | 2018-07-05 14:50:48 +0300 | [diff] [blame] | 1111 | |
| 1112 | end_trans: |
| 1113 | ret = btrfs_end_transaction(trans); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1114 | out: |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1115 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1116 | return ret; |
| 1117 | } |
| 1118 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1119 | static void qgroup_dirty(struct btrfs_fs_info *fs_info, |
| 1120 | struct btrfs_qgroup *qgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1121 | { |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 1122 | if (list_empty(&qgroup->dirty)) |
| 1123 | list_add(&qgroup->dirty, &fs_info->dirty_qgroups); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1124 | } |
| 1125 | |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1126 | /* |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1127 | * The easy accounting, we're updating qgroup relationship whose child qgroup |
| 1128 | * only has exclusive extents. |
| 1129 | * |
Andrea Gelmini | 52042d8 | 2018-11-28 12:05:13 +0100 | [diff] [blame] | 1130 | * In this case, all exclusive extents will also be exclusive for parent, so |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1131 | * excl/rfer just get added/removed. |
| 1132 | * |
| 1133 | * So is qgroup reservation space, which should also be added/removed to |
| 1134 | * parent. |
| 1135 | * Or when child tries to release reservation space, parent will underflow its |
| 1136 | * reservation (for relationship adding case). |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1137 | * |
| 1138 | * Caller should hold fs_info->qgroup_lock. |
| 1139 | */ |
| 1140 | static int __qgroup_excl_accounting(struct btrfs_fs_info *fs_info, |
| 1141 | struct ulist *tmp, u64 ref_root, |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1142 | struct btrfs_qgroup *src, int sign) |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1143 | { |
| 1144 | struct btrfs_qgroup *qgroup; |
| 1145 | struct btrfs_qgroup_list *glist; |
| 1146 | struct ulist_node *unode; |
| 1147 | struct ulist_iterator uiter; |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1148 | u64 num_bytes = src->excl; |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1149 | int ret = 0; |
| 1150 | |
| 1151 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 1152 | if (!qgroup) |
| 1153 | goto out; |
| 1154 | |
| 1155 | qgroup->rfer += sign * num_bytes; |
| 1156 | qgroup->rfer_cmpr += sign * num_bytes; |
| 1157 | |
| 1158 | WARN_ON(sign < 0 && qgroup->excl < num_bytes); |
| 1159 | qgroup->excl += sign * num_bytes; |
| 1160 | qgroup->excl_cmpr += sign * num_bytes; |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1161 | |
| 1162 | if (sign > 0) |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 1163 | qgroup_rsv_add_by_qgroup(fs_info, qgroup, src); |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1164 | else |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 1165 | qgroup_rsv_release_by_qgroup(fs_info, qgroup, src); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1166 | |
| 1167 | qgroup_dirty(fs_info, qgroup); |
| 1168 | |
| 1169 | /* Get all of the parent groups that contain this qgroup */ |
| 1170 | list_for_each_entry(glist, &qgroup->groups, next_group) { |
| 1171 | ret = ulist_add(tmp, glist->group->qgroupid, |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 1172 | qgroup_to_aux(glist->group), GFP_ATOMIC); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1173 | if (ret < 0) |
| 1174 | goto out; |
| 1175 | } |
| 1176 | |
| 1177 | /* Iterate all of the parents and adjust their reference counts */ |
| 1178 | ULIST_ITER_INIT(&uiter); |
| 1179 | while ((unode = ulist_next(tmp, &uiter))) { |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 1180 | qgroup = unode_aux_to_qgroup(unode); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1181 | qgroup->rfer += sign * num_bytes; |
| 1182 | qgroup->rfer_cmpr += sign * num_bytes; |
| 1183 | WARN_ON(sign < 0 && qgroup->excl < num_bytes); |
| 1184 | qgroup->excl += sign * num_bytes; |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1185 | if (sign > 0) |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 1186 | qgroup_rsv_add_by_qgroup(fs_info, qgroup, src); |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1187 | else |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 1188 | qgroup_rsv_release_by_qgroup(fs_info, qgroup, src); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1189 | qgroup->excl_cmpr += sign * num_bytes; |
| 1190 | qgroup_dirty(fs_info, qgroup); |
| 1191 | |
| 1192 | /* Add any parents of the parents */ |
| 1193 | list_for_each_entry(glist, &qgroup->groups, next_group) { |
| 1194 | ret = ulist_add(tmp, glist->group->qgroupid, |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 1195 | qgroup_to_aux(glist->group), GFP_ATOMIC); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1196 | if (ret < 0) |
| 1197 | goto out; |
| 1198 | } |
| 1199 | } |
| 1200 | ret = 0; |
| 1201 | out: |
| 1202 | return ret; |
| 1203 | } |
| 1204 | |
| 1205 | |
| 1206 | /* |
| 1207 | * Quick path for updating qgroup with only excl refs. |
| 1208 | * |
| 1209 | * In that case, just update all parent will be enough. |
| 1210 | * Or we needs to do a full rescan. |
| 1211 | * Caller should also hold fs_info->qgroup_lock. |
| 1212 | * |
| 1213 | * Return 0 for quick update, return >0 for need to full rescan |
| 1214 | * and mark INCONSISTENT flag. |
| 1215 | * Return < 0 for other error. |
| 1216 | */ |
| 1217 | static int quick_update_accounting(struct btrfs_fs_info *fs_info, |
| 1218 | struct ulist *tmp, u64 src, u64 dst, |
| 1219 | int sign) |
| 1220 | { |
| 1221 | struct btrfs_qgroup *qgroup; |
| 1222 | int ret = 1; |
| 1223 | int err = 0; |
| 1224 | |
| 1225 | qgroup = find_qgroup_rb(fs_info, src); |
| 1226 | if (!qgroup) |
| 1227 | goto out; |
| 1228 | if (qgroup->excl == qgroup->rfer) { |
| 1229 | ret = 0; |
| 1230 | err = __qgroup_excl_accounting(fs_info, tmp, dst, |
Qu Wenruo | 429d627 | 2017-12-12 15:34:26 +0800 | [diff] [blame] | 1231 | qgroup, sign); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1232 | if (err < 0) { |
| 1233 | ret = err; |
| 1234 | goto out; |
| 1235 | } |
| 1236 | } |
| 1237 | out: |
| 1238 | if (ret) |
| 1239 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1240 | return ret; |
| 1241 | } |
| 1242 | |
Lu Fengqi | 9f8a6ce | 2018-07-18 14:45:30 +0800 | [diff] [blame] | 1243 | int btrfs_add_qgroup_relation(struct btrfs_trans_handle *trans, u64 src, |
| 1244 | u64 dst) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1245 | { |
Lu Fengqi | 9f8a6ce | 2018-07-18 14:45:30 +0800 | [diff] [blame] | 1246 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Wang Shilong | b7fef4f | 2013-04-07 10:50:18 +0000 | [diff] [blame] | 1247 | struct btrfs_qgroup *parent; |
| 1248 | struct btrfs_qgroup *member; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1249 | struct btrfs_qgroup_list *list; |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1250 | struct ulist *tmp; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1251 | int ret = 0; |
| 1252 | |
Qu Wenruo | 8465ece | 2015-02-27 16:24:22 +0800 | [diff] [blame] | 1253 | /* Check the level of src and dst first */ |
| 1254 | if (btrfs_qgroup_level(src) >= btrfs_qgroup_level(dst)) |
| 1255 | return -EINVAL; |
| 1256 | |
David Sterba | 6602caf | 2017-02-13 12:41:02 +0100 | [diff] [blame] | 1257 | tmp = ulist_alloc(GFP_KERNEL); |
Christian Engelmayer | ab3680d | 2015-05-02 17:19:55 +0200 | [diff] [blame] | 1258 | if (!tmp) |
| 1259 | return -ENOMEM; |
| 1260 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1261 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 1262 | if (!fs_info->quota_root) { |
Marcos Paulo de Souza | 8a36e40 | 2019-11-25 21:58:51 -0300 | [diff] [blame] | 1263 | ret = -ENOTCONN; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1264 | goto out; |
| 1265 | } |
Wang Shilong | b7fef4f | 2013-04-07 10:50:18 +0000 | [diff] [blame] | 1266 | member = find_qgroup_rb(fs_info, src); |
| 1267 | parent = find_qgroup_rb(fs_info, dst); |
| 1268 | if (!member || !parent) { |
| 1269 | ret = -EINVAL; |
| 1270 | goto out; |
| 1271 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1272 | |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1273 | /* check if such qgroup relation exist firstly */ |
| 1274 | list_for_each_entry(list, &member->groups, next_group) { |
| 1275 | if (list->group == parent) { |
| 1276 | ret = -EEXIST; |
| 1277 | goto out; |
| 1278 | } |
| 1279 | } |
| 1280 | |
Lu Fengqi | 711169c | 2018-07-18 14:45:24 +0800 | [diff] [blame] | 1281 | ret = add_qgroup_relation_item(trans, src, dst); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1282 | if (ret) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1283 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1284 | |
Lu Fengqi | 711169c | 2018-07-18 14:45:24 +0800 | [diff] [blame] | 1285 | ret = add_qgroup_relation_item(trans, dst, src); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1286 | if (ret) { |
Lu Fengqi | 99d7f09 | 2018-07-18 14:45:25 +0800 | [diff] [blame] | 1287 | del_qgroup_relation_item(trans, src, dst); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1288 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1289 | } |
| 1290 | |
| 1291 | spin_lock(&fs_info->qgroup_lock); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 1292 | ret = add_relation_rb(fs_info, src, dst); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1293 | if (ret < 0) { |
| 1294 | spin_unlock(&fs_info->qgroup_lock); |
| 1295 | goto out; |
| 1296 | } |
| 1297 | ret = quick_update_accounting(fs_info, tmp, src, dst, 1); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1298 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1299 | out: |
| 1300 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1301 | ulist_free(tmp); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1302 | return ret; |
| 1303 | } |
| 1304 | |
Lu Fengqi | 6b36f1a | 2018-07-18 14:45:31 +0800 | [diff] [blame] | 1305 | static int __del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src, |
| 1306 | u64 dst) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1307 | { |
Lu Fengqi | 6b36f1a | 2018-07-18 14:45:31 +0800 | [diff] [blame] | 1308 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1309 | struct btrfs_qgroup *parent; |
| 1310 | struct btrfs_qgroup *member; |
| 1311 | struct btrfs_qgroup_list *list; |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1312 | struct ulist *tmp; |
Qu Wenruo | 73798c4 | 2019-08-06 22:05:07 +0800 | [diff] [blame] | 1313 | bool found = false; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1314 | int ret = 0; |
Qu Wenruo | 73798c4 | 2019-08-06 22:05:07 +0800 | [diff] [blame] | 1315 | int ret2; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1316 | |
David Sterba | 6602caf | 2017-02-13 12:41:02 +0100 | [diff] [blame] | 1317 | tmp = ulist_alloc(GFP_KERNEL); |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1318 | if (!tmp) |
| 1319 | return -ENOMEM; |
| 1320 | |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 1321 | if (!fs_info->quota_root) { |
Marcos Paulo de Souza | 8a36e40 | 2019-11-25 21:58:51 -0300 | [diff] [blame] | 1322 | ret = -ENOTCONN; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1323 | goto out; |
| 1324 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1325 | |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1326 | member = find_qgroup_rb(fs_info, src); |
| 1327 | parent = find_qgroup_rb(fs_info, dst); |
Qu Wenruo | 73798c4 | 2019-08-06 22:05:07 +0800 | [diff] [blame] | 1328 | /* |
| 1329 | * The parent/member pair doesn't exist, then try to delete the dead |
| 1330 | * relation items only. |
| 1331 | */ |
| 1332 | if (!member || !parent) |
| 1333 | goto delete_item; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1334 | |
| 1335 | /* check if such qgroup relation exist firstly */ |
| 1336 | list_for_each_entry(list, &member->groups, next_group) { |
Qu Wenruo | 73798c4 | 2019-08-06 22:05:07 +0800 | [diff] [blame] | 1337 | if (list->group == parent) { |
| 1338 | found = true; |
| 1339 | break; |
| 1340 | } |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1341 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1342 | |
Qu Wenruo | 73798c4 | 2019-08-06 22:05:07 +0800 | [diff] [blame] | 1343 | delete_item: |
| 1344 | ret = del_qgroup_relation_item(trans, src, dst); |
| 1345 | if (ret < 0 && ret != -ENOENT) |
| 1346 | goto out; |
| 1347 | ret2 = del_qgroup_relation_item(trans, dst, src); |
| 1348 | if (ret2 < 0 && ret2 != -ENOENT) |
| 1349 | goto out; |
| 1350 | |
| 1351 | /* At least one deletion succeeded, return 0 */ |
| 1352 | if (!ret || !ret2) |
| 1353 | ret = 0; |
| 1354 | |
| 1355 | if (found) { |
| 1356 | spin_lock(&fs_info->qgroup_lock); |
| 1357 | del_relation_rb(fs_info, src, dst); |
| 1358 | ret = quick_update_accounting(fs_info, tmp, src, dst, -1); |
| 1359 | spin_unlock(&fs_info->qgroup_lock); |
| 1360 | } |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1361 | out: |
Qu Wenruo | 9c8b35b | 2015-02-27 16:24:27 +0800 | [diff] [blame] | 1362 | ulist_free(tmp); |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1363 | return ret; |
| 1364 | } |
| 1365 | |
Lu Fengqi | 39616c2 | 2018-07-18 14:45:32 +0800 | [diff] [blame] | 1366 | int btrfs_del_qgroup_relation(struct btrfs_trans_handle *trans, u64 src, |
| 1367 | u64 dst) |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1368 | { |
Lu Fengqi | 39616c2 | 2018-07-18 14:45:32 +0800 | [diff] [blame] | 1369 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1370 | int ret = 0; |
| 1371 | |
| 1372 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Lu Fengqi | 6b36f1a | 2018-07-18 14:45:31 +0800 | [diff] [blame] | 1373 | ret = __del_qgroup_relation(trans, src, dst); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1374 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1375 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1376 | return ret; |
| 1377 | } |
| 1378 | |
Lu Fengqi | 49a05ec | 2018-07-18 14:45:33 +0800 | [diff] [blame] | 1379 | int btrfs_create_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1380 | { |
Lu Fengqi | 49a05ec | 2018-07-18 14:45:33 +0800 | [diff] [blame] | 1381 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1382 | struct btrfs_root *quota_root; |
| 1383 | struct btrfs_qgroup *qgroup; |
| 1384 | int ret = 0; |
| 1385 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1386 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 1387 | if (!fs_info->quota_root) { |
Marcos Paulo de Souza | 8a36e40 | 2019-11-25 21:58:51 -0300 | [diff] [blame] | 1388 | ret = -ENOTCONN; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1389 | goto out; |
| 1390 | } |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 1391 | quota_root = fs_info->quota_root; |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1392 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 1393 | if (qgroup) { |
| 1394 | ret = -EEXIST; |
| 1395 | goto out; |
| 1396 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1397 | |
| 1398 | ret = add_qgroup_item(trans, quota_root, qgroupid); |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1399 | if (ret) |
| 1400 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1401 | |
| 1402 | spin_lock(&fs_info->qgroup_lock); |
| 1403 | qgroup = add_qgroup_rb(fs_info, qgroupid); |
| 1404 | spin_unlock(&fs_info->qgroup_lock); |
| 1405 | |
| 1406 | if (IS_ERR(qgroup)) |
| 1407 | ret = PTR_ERR(qgroup); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1408 | out: |
| 1409 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1410 | return ret; |
| 1411 | } |
| 1412 | |
Lu Fengqi | 3efbee1 | 2018-07-18 14:45:34 +0800 | [diff] [blame] | 1413 | int btrfs_remove_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1414 | { |
Lu Fengqi | 3efbee1 | 2018-07-18 14:45:34 +0800 | [diff] [blame] | 1415 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1416 | struct btrfs_qgroup *qgroup; |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1417 | struct btrfs_qgroup_list *list; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1418 | int ret = 0; |
| 1419 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1420 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 1421 | if (!fs_info->quota_root) { |
Marcos Paulo de Souza | 8a36e40 | 2019-11-25 21:58:51 -0300 | [diff] [blame] | 1422 | ret = -ENOTCONN; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1423 | goto out; |
| 1424 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1425 | |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1426 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
Wang Shilong | 534e662 | 2013-04-17 14:49:51 +0000 | [diff] [blame] | 1427 | if (!qgroup) { |
| 1428 | ret = -ENOENT; |
| 1429 | goto out; |
Arne Jansen | 2cf6870 | 2013-01-17 01:22:09 -0700 | [diff] [blame] | 1430 | } |
Lu Fengqi | b90e22b | 2018-10-11 13:42:56 +0800 | [diff] [blame] | 1431 | |
| 1432 | /* Check if there are no children of this qgroup */ |
| 1433 | if (!list_empty(&qgroup->members)) { |
| 1434 | ret = -EBUSY; |
| 1435 | goto out; |
| 1436 | } |
| 1437 | |
Lu Fengqi | 6910461 | 2018-07-18 14:45:26 +0800 | [diff] [blame] | 1438 | ret = del_qgroup_item(trans, qgroupid); |
Sargun Dhillon | 36b96fd | 2017-09-17 09:02:29 +0000 | [diff] [blame] | 1439 | if (ret && ret != -ENOENT) |
| 1440 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1441 | |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1442 | while (!list_empty(&qgroup->groups)) { |
| 1443 | list = list_first_entry(&qgroup->groups, |
| 1444 | struct btrfs_qgroup_list, next_group); |
Lu Fengqi | 6b36f1a | 2018-07-18 14:45:31 +0800 | [diff] [blame] | 1445 | ret = __del_qgroup_relation(trans, qgroupid, |
| 1446 | list->group->qgroupid); |
Dongsheng Yang | f5a6b1c | 2014-11-24 10:27:09 -0500 | [diff] [blame] | 1447 | if (ret) |
| 1448 | goto out; |
| 1449 | } |
| 1450 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1451 | spin_lock(&fs_info->qgroup_lock); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 1452 | del_qgroup_rb(fs_info, qgroupid); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1453 | spin_unlock(&fs_info->qgroup_lock); |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1454 | out: |
| 1455 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1456 | return ret; |
| 1457 | } |
| 1458 | |
Lu Fengqi | f0042d5 | 2018-07-18 14:45:35 +0800 | [diff] [blame] | 1459 | int btrfs_limit_qgroup(struct btrfs_trans_handle *trans, u64 qgroupid, |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1460 | struct btrfs_qgroup_limit *limit) |
| 1461 | { |
Lu Fengqi | f0042d5 | 2018-07-18 14:45:35 +0800 | [diff] [blame] | 1462 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1463 | struct btrfs_qgroup *qgroup; |
| 1464 | int ret = 0; |
Yang Dongsheng | fe75990 | 2015-06-03 14:57:32 +0800 | [diff] [blame] | 1465 | /* Sometimes we would want to clear the limit on this qgroup. |
| 1466 | * To meet this requirement, we treat the -1 as a special value |
| 1467 | * which tell kernel to clear the limit on this qgroup. |
| 1468 | */ |
| 1469 | const u64 CLEAR_VALUE = -1; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1470 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1471 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 1472 | if (!fs_info->quota_root) { |
Marcos Paulo de Souza | 8a36e40 | 2019-11-25 21:58:51 -0300 | [diff] [blame] | 1473 | ret = -ENOTCONN; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1474 | goto out; |
| 1475 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1476 | |
Wang Shilong | ddb47af | 2013-04-07 10:50:20 +0000 | [diff] [blame] | 1477 | qgroup = find_qgroup_rb(fs_info, qgroupid); |
| 1478 | if (!qgroup) { |
| 1479 | ret = -ENOENT; |
| 1480 | goto out; |
| 1481 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1482 | |
Wang Shilong | 58400fc | 2013-04-07 10:50:17 +0000 | [diff] [blame] | 1483 | spin_lock(&fs_info->qgroup_lock); |
Yang Dongsheng | fe75990 | 2015-06-03 14:57:32 +0800 | [diff] [blame] | 1484 | if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_RFER) { |
| 1485 | if (limit->max_rfer == CLEAR_VALUE) { |
| 1486 | qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_MAX_RFER; |
| 1487 | limit->flags &= ~BTRFS_QGROUP_LIMIT_MAX_RFER; |
| 1488 | qgroup->max_rfer = 0; |
| 1489 | } else { |
| 1490 | qgroup->max_rfer = limit->max_rfer; |
| 1491 | } |
| 1492 | } |
| 1493 | if (limit->flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) { |
| 1494 | if (limit->max_excl == CLEAR_VALUE) { |
| 1495 | qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_MAX_EXCL; |
| 1496 | limit->flags &= ~BTRFS_QGROUP_LIMIT_MAX_EXCL; |
| 1497 | qgroup->max_excl = 0; |
| 1498 | } else { |
| 1499 | qgroup->max_excl = limit->max_excl; |
| 1500 | } |
| 1501 | } |
| 1502 | if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_RFER) { |
| 1503 | if (limit->rsv_rfer == CLEAR_VALUE) { |
| 1504 | qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_RSV_RFER; |
| 1505 | limit->flags &= ~BTRFS_QGROUP_LIMIT_RSV_RFER; |
| 1506 | qgroup->rsv_rfer = 0; |
| 1507 | } else { |
| 1508 | qgroup->rsv_rfer = limit->rsv_rfer; |
| 1509 | } |
| 1510 | } |
| 1511 | if (limit->flags & BTRFS_QGROUP_LIMIT_RSV_EXCL) { |
| 1512 | if (limit->rsv_excl == CLEAR_VALUE) { |
| 1513 | qgroup->lim_flags &= ~BTRFS_QGROUP_LIMIT_RSV_EXCL; |
| 1514 | limit->flags &= ~BTRFS_QGROUP_LIMIT_RSV_EXCL; |
| 1515 | qgroup->rsv_excl = 0; |
| 1516 | } else { |
| 1517 | qgroup->rsv_excl = limit->rsv_excl; |
| 1518 | } |
| 1519 | } |
Dongsheng Yang | 03477d9 | 2015-02-06 11:06:25 -0500 | [diff] [blame] | 1520 | qgroup->lim_flags |= limit->flags; |
| 1521 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1522 | spin_unlock(&fs_info->qgroup_lock); |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 1523 | |
Lu Fengqi | ac8a866 | 2018-07-18 14:45:27 +0800 | [diff] [blame] | 1524 | ret = update_qgroup_limit_item(trans, qgroup); |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 1525 | if (ret) { |
| 1526 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1527 | btrfs_info(fs_info, "unable to update quota limit for %llu", |
| 1528 | qgroupid); |
| 1529 | } |
| 1530 | |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 1531 | out: |
| 1532 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 1533 | return ret; |
| 1534 | } |
Mark Fasheh | 1152651 | 2014-07-17 12:39:01 -0700 | [diff] [blame] | 1535 | |
Qu Wenruo | 50b3e04 | 2016-10-18 09:31:27 +0800 | [diff] [blame] | 1536 | int btrfs_qgroup_trace_extent_nolock(struct btrfs_fs_info *fs_info, |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1537 | struct btrfs_delayed_ref_root *delayed_refs, |
| 1538 | struct btrfs_qgroup_extent_record *record) |
Qu Wenruo | 3368d00 | 2015-04-16 14:34:17 +0800 | [diff] [blame] | 1539 | { |
| 1540 | struct rb_node **p = &delayed_refs->dirty_extent_root.rb_node; |
| 1541 | struct rb_node *parent_node = NULL; |
| 1542 | struct btrfs_qgroup_extent_record *entry; |
| 1543 | u64 bytenr = record->bytenr; |
| 1544 | |
David Sterba | a4666e6 | 2018-03-16 02:21:22 +0100 | [diff] [blame] | 1545 | lockdep_assert_held(&delayed_refs->lock); |
Qu Wenruo | 50b3e04 | 2016-10-18 09:31:27 +0800 | [diff] [blame] | 1546 | trace_btrfs_qgroup_trace_extent(fs_info, record); |
Mark Fasheh | 82bd101 | 2015-11-05 14:38:00 -0800 | [diff] [blame] | 1547 | |
Qu Wenruo | 3368d00 | 2015-04-16 14:34:17 +0800 | [diff] [blame] | 1548 | while (*p) { |
| 1549 | parent_node = *p; |
| 1550 | entry = rb_entry(parent_node, struct btrfs_qgroup_extent_record, |
| 1551 | node); |
Qu Wenruo | 1418bae | 2019-01-23 15:15:12 +0800 | [diff] [blame] | 1552 | if (bytenr < entry->bytenr) { |
Qu Wenruo | 3368d00 | 2015-04-16 14:34:17 +0800 | [diff] [blame] | 1553 | p = &(*p)->rb_left; |
Qu Wenruo | 1418bae | 2019-01-23 15:15:12 +0800 | [diff] [blame] | 1554 | } else if (bytenr > entry->bytenr) { |
Qu Wenruo | 3368d00 | 2015-04-16 14:34:17 +0800 | [diff] [blame] | 1555 | p = &(*p)->rb_right; |
Qu Wenruo | 1418bae | 2019-01-23 15:15:12 +0800 | [diff] [blame] | 1556 | } else { |
| 1557 | if (record->data_rsv && !entry->data_rsv) { |
| 1558 | entry->data_rsv = record->data_rsv; |
| 1559 | entry->data_rsv_refroot = |
| 1560 | record->data_rsv_refroot; |
| 1561 | } |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1562 | return 1; |
Qu Wenruo | 1418bae | 2019-01-23 15:15:12 +0800 | [diff] [blame] | 1563 | } |
Qu Wenruo | 3368d00 | 2015-04-16 14:34:17 +0800 | [diff] [blame] | 1564 | } |
| 1565 | |
| 1566 | rb_link_node(&record->node, parent_node, p); |
| 1567 | rb_insert_color(&record->node, &delayed_refs->dirty_extent_root); |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1568 | return 0; |
| 1569 | } |
| 1570 | |
Qu Wenruo | fb235dc | 2017-02-15 10:43:03 +0800 | [diff] [blame] | 1571 | int btrfs_qgroup_trace_extent_post(struct btrfs_fs_info *fs_info, |
| 1572 | struct btrfs_qgroup_extent_record *qrecord) |
| 1573 | { |
| 1574 | struct ulist *old_root; |
| 1575 | u64 bytenr = qrecord->bytenr; |
| 1576 | int ret; |
| 1577 | |
Zygo Blaxell | c995ab3 | 2017-09-22 13:58:45 -0400 | [diff] [blame] | 1578 | ret = btrfs_find_all_roots(NULL, fs_info, bytenr, 0, &old_root, false); |
Nikolay Borisov | 952bd3db | 2018-01-29 15:53:01 +0200 | [diff] [blame] | 1579 | if (ret < 0) { |
| 1580 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 1581 | btrfs_warn(fs_info, |
| 1582 | "error accounting new delayed refs extent (err code: %d), quota inconsistent", |
| 1583 | ret); |
| 1584 | return 0; |
| 1585 | } |
Qu Wenruo | fb235dc | 2017-02-15 10:43:03 +0800 | [diff] [blame] | 1586 | |
| 1587 | /* |
| 1588 | * Here we don't need to get the lock of |
| 1589 | * trans->transaction->delayed_refs, since inserted qrecord won't |
| 1590 | * be deleted, only qrecord->node may be modified (new qrecord insert) |
| 1591 | * |
| 1592 | * So modifying qrecord->old_roots is safe here |
| 1593 | */ |
| 1594 | qrecord->old_roots = old_root; |
| 1595 | return 0; |
| 1596 | } |
| 1597 | |
Lu Fengqi | a95f3aa | 2018-07-18 16:28:03 +0800 | [diff] [blame] | 1598 | int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr, |
| 1599 | u64 num_bytes, gfp_t gfp_flag) |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1600 | { |
Lu Fengqi | a95f3aa | 2018-07-18 16:28:03 +0800 | [diff] [blame] | 1601 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1602 | struct btrfs_qgroup_extent_record *record; |
| 1603 | struct btrfs_delayed_ref_root *delayed_refs; |
| 1604 | int ret; |
| 1605 | |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 1606 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) |
| 1607 | || bytenr == 0 || num_bytes == 0) |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1608 | return 0; |
Qu Wenruo | 1418bae | 2019-01-23 15:15:12 +0800 | [diff] [blame] | 1609 | record = kzalloc(sizeof(*record), gfp_flag); |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1610 | if (!record) |
| 1611 | return -ENOMEM; |
| 1612 | |
| 1613 | delayed_refs = &trans->transaction->delayed_refs; |
| 1614 | record->bytenr = bytenr; |
| 1615 | record->num_bytes = num_bytes; |
| 1616 | record->old_roots = NULL; |
| 1617 | |
| 1618 | spin_lock(&delayed_refs->lock); |
Jeff Mahoney | 2ff7e61 | 2016-06-22 18:54:24 -0400 | [diff] [blame] | 1619 | ret = btrfs_qgroup_trace_extent_nolock(fs_info, delayed_refs, record); |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1620 | spin_unlock(&delayed_refs->lock); |
Qu Wenruo | fb235dc | 2017-02-15 10:43:03 +0800 | [diff] [blame] | 1621 | if (ret > 0) { |
Qu Wenruo | cb93b52 | 2016-08-15 10:36:50 +0800 | [diff] [blame] | 1622 | kfree(record); |
Qu Wenruo | fb235dc | 2017-02-15 10:43:03 +0800 | [diff] [blame] | 1623 | return 0; |
| 1624 | } |
| 1625 | return btrfs_qgroup_trace_extent_post(fs_info, record); |
Qu Wenruo | 3368d00 | 2015-04-16 14:34:17 +0800 | [diff] [blame] | 1626 | } |
| 1627 | |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1628 | int btrfs_qgroup_trace_leaf_items(struct btrfs_trans_handle *trans, |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1629 | struct extent_buffer *eb) |
| 1630 | { |
Lu Fengqi | 8d38d7e | 2018-07-18 14:45:37 +0800 | [diff] [blame] | 1631 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1632 | int nr = btrfs_header_nritems(eb); |
| 1633 | int i, extent_type, ret; |
| 1634 | struct btrfs_key key; |
| 1635 | struct btrfs_file_extent_item *fi; |
| 1636 | u64 bytenr, num_bytes; |
| 1637 | |
| 1638 | /* We can be called directly from walk_up_proc() */ |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 1639 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1640 | return 0; |
| 1641 | |
| 1642 | for (i = 0; i < nr; i++) { |
| 1643 | btrfs_item_key_to_cpu(eb, &key, i); |
| 1644 | |
| 1645 | if (key.type != BTRFS_EXTENT_DATA_KEY) |
| 1646 | continue; |
| 1647 | |
| 1648 | fi = btrfs_item_ptr(eb, i, struct btrfs_file_extent_item); |
| 1649 | /* filter out non qgroup-accountable extents */ |
| 1650 | extent_type = btrfs_file_extent_type(eb, fi); |
| 1651 | |
| 1652 | if (extent_type == BTRFS_FILE_EXTENT_INLINE) |
| 1653 | continue; |
| 1654 | |
| 1655 | bytenr = btrfs_file_extent_disk_bytenr(eb, fi); |
| 1656 | if (!bytenr) |
| 1657 | continue; |
| 1658 | |
| 1659 | num_bytes = btrfs_file_extent_disk_num_bytes(eb, fi); |
| 1660 | |
Lu Fengqi | a95f3aa | 2018-07-18 16:28:03 +0800 | [diff] [blame] | 1661 | ret = btrfs_qgroup_trace_extent(trans, bytenr, num_bytes, |
| 1662 | GFP_NOFS); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1663 | if (ret) |
| 1664 | return ret; |
| 1665 | } |
Jeff Mahoney | cddf3b2 | 2017-06-20 08:15:26 -0400 | [diff] [blame] | 1666 | cond_resched(); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1667 | return 0; |
| 1668 | } |
| 1669 | |
| 1670 | /* |
| 1671 | * Walk up the tree from the bottom, freeing leaves and any interior |
| 1672 | * nodes which have had all slots visited. If a node (leaf or |
| 1673 | * interior) is freed, the node above it will have it's slot |
| 1674 | * incremented. The root node will never be freed. |
| 1675 | * |
| 1676 | * At the end of this function, we should have a path which has all |
| 1677 | * slots incremented to the next position for a search. If we need to |
| 1678 | * read a new node it will be NULL and the node above it will have the |
| 1679 | * correct slot selected for a later read. |
| 1680 | * |
| 1681 | * If we increment the root nodes slot counter past the number of |
| 1682 | * elements, 1 is returned to signal completion of the search. |
| 1683 | */ |
David Sterba | 15b3451 | 2017-02-10 20:30:23 +0100 | [diff] [blame] | 1684 | static int adjust_slots_upwards(struct btrfs_path *path, int root_level) |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 1685 | { |
| 1686 | int level = 0; |
| 1687 | int nr, slot; |
| 1688 | struct extent_buffer *eb; |
| 1689 | |
| 1690 | if (root_level == 0) |
| 1691 | return 1; |
| 1692 | |
| 1693 | while (level <= root_level) { |
| 1694 | eb = path->nodes[level]; |
| 1695 | nr = btrfs_header_nritems(eb); |
| 1696 | path->slots[level]++; |
| 1697 | slot = path->slots[level]; |
| 1698 | if (slot >= nr || level == 0) { |
| 1699 | /* |
| 1700 | * Don't free the root - we will detect this |
| 1701 | * condition after our loop and return a |
| 1702 | * positive value for caller to stop walking the tree. |
| 1703 | */ |
| 1704 | if (level != root_level) { |
| 1705 | btrfs_tree_unlock_rw(eb, path->locks[level]); |
| 1706 | path->locks[level] = 0; |
| 1707 | |
| 1708 | free_extent_buffer(eb); |
| 1709 | path->nodes[level] = NULL; |
| 1710 | path->slots[level] = 0; |
| 1711 | } |
| 1712 | } else { |
| 1713 | /* |
| 1714 | * We have a valid slot to walk back down |
| 1715 | * from. Stop here so caller can process these |
| 1716 | * new nodes. |
| 1717 | */ |
| 1718 | break; |
| 1719 | } |
| 1720 | |
| 1721 | level++; |
| 1722 | } |
| 1723 | |
| 1724 | eb = path->nodes[root_level]; |
| 1725 | if (path->slots[root_level] >= btrfs_header_nritems(eb)) |
| 1726 | return 1; |
| 1727 | |
| 1728 | return 0; |
| 1729 | } |
| 1730 | |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1731 | /* |
| 1732 | * Helper function to trace a subtree tree block swap. |
| 1733 | * |
| 1734 | * The swap will happen in highest tree block, but there may be a lot of |
| 1735 | * tree blocks involved. |
| 1736 | * |
| 1737 | * For example: |
| 1738 | * OO = Old tree blocks |
| 1739 | * NN = New tree blocks allocated during balance |
| 1740 | * |
| 1741 | * File tree (257) Reloc tree for 257 |
| 1742 | * L2 OO NN |
| 1743 | * / \ / \ |
| 1744 | * L1 OO OO (a) OO NN (a) |
| 1745 | * / \ / \ / \ / \ |
| 1746 | * L0 OO OO OO OO OO OO NN NN |
| 1747 | * (b) (c) (b) (c) |
| 1748 | * |
| 1749 | * When calling qgroup_trace_extent_swap(), we will pass: |
| 1750 | * @src_eb = OO(a) |
| 1751 | * @dst_path = [ nodes[1] = NN(a), nodes[0] = NN(c) ] |
| 1752 | * @dst_level = 0 |
| 1753 | * @root_level = 1 |
| 1754 | * |
| 1755 | * In that case, qgroup_trace_extent_swap() will search from OO(a) to |
| 1756 | * reach OO(c), then mark both OO(c) and NN(c) as qgroup dirty. |
| 1757 | * |
| 1758 | * The main work of qgroup_trace_extent_swap() can be split into 3 parts: |
| 1759 | * |
| 1760 | * 1) Tree search from @src_eb |
| 1761 | * It should acts as a simplified btrfs_search_slot(). |
| 1762 | * The key for search can be extracted from @dst_path->nodes[dst_level] |
| 1763 | * (first key). |
| 1764 | * |
| 1765 | * 2) Mark the final tree blocks in @src_path and @dst_path qgroup dirty |
| 1766 | * NOTE: In above case, OO(a) and NN(a) won't be marked qgroup dirty. |
Andrea Gelmini | 52042d8 | 2018-11-28 12:05:13 +0100 | [diff] [blame] | 1767 | * They should be marked during previous (@dst_level = 1) iteration. |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1768 | * |
| 1769 | * 3) Mark file extents in leaves dirty |
| 1770 | * We don't have good way to pick out new file extents only. |
| 1771 | * So we still follow the old method by scanning all file extents in |
| 1772 | * the leave. |
| 1773 | * |
Andrea Gelmini | 52042d8 | 2018-11-28 12:05:13 +0100 | [diff] [blame] | 1774 | * This function can free us from keeping two paths, thus later we only need |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1775 | * to care about how to iterate all new tree blocks in reloc tree. |
| 1776 | */ |
| 1777 | static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans, |
| 1778 | struct extent_buffer *src_eb, |
| 1779 | struct btrfs_path *dst_path, |
Qu Wenruo | 3d0174f | 2018-09-27 14:42:35 +0800 | [diff] [blame] | 1780 | int dst_level, int root_level, |
| 1781 | bool trace_leaf) |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1782 | { |
| 1783 | struct btrfs_key key; |
| 1784 | struct btrfs_path *src_path; |
| 1785 | struct btrfs_fs_info *fs_info = trans->fs_info; |
| 1786 | u32 nodesize = fs_info->nodesize; |
| 1787 | int cur_level = root_level; |
| 1788 | int ret; |
| 1789 | |
| 1790 | BUG_ON(dst_level > root_level); |
| 1791 | /* Level mismatch */ |
| 1792 | if (btrfs_header_level(src_eb) != root_level) |
| 1793 | return -EINVAL; |
| 1794 | |
| 1795 | src_path = btrfs_alloc_path(); |
| 1796 | if (!src_path) { |
| 1797 | ret = -ENOMEM; |
| 1798 | goto out; |
| 1799 | } |
| 1800 | |
| 1801 | if (dst_level) |
| 1802 | btrfs_node_key_to_cpu(dst_path->nodes[dst_level], &key, 0); |
| 1803 | else |
| 1804 | btrfs_item_key_to_cpu(dst_path->nodes[dst_level], &key, 0); |
| 1805 | |
| 1806 | /* For src_path */ |
David Sterba | 67439da | 2019-10-08 13:28:47 +0200 | [diff] [blame] | 1807 | atomic_inc(&src_eb->refs); |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1808 | src_path->nodes[root_level] = src_eb; |
| 1809 | src_path->slots[root_level] = dst_path->slots[root_level]; |
| 1810 | src_path->locks[root_level] = 0; |
| 1811 | |
| 1812 | /* A simplified version of btrfs_search_slot() */ |
| 1813 | while (cur_level >= dst_level) { |
| 1814 | struct btrfs_key src_key; |
| 1815 | struct btrfs_key dst_key; |
| 1816 | |
| 1817 | if (src_path->nodes[cur_level] == NULL) { |
| 1818 | struct btrfs_key first_key; |
| 1819 | struct extent_buffer *eb; |
| 1820 | int parent_slot; |
| 1821 | u64 child_gen; |
| 1822 | u64 child_bytenr; |
| 1823 | |
| 1824 | eb = src_path->nodes[cur_level + 1]; |
| 1825 | parent_slot = src_path->slots[cur_level + 1]; |
| 1826 | child_bytenr = btrfs_node_blockptr(eb, parent_slot); |
| 1827 | child_gen = btrfs_node_ptr_generation(eb, parent_slot); |
| 1828 | btrfs_node_key_to_cpu(eb, &first_key, parent_slot); |
| 1829 | |
| 1830 | eb = read_tree_block(fs_info, child_bytenr, child_gen, |
| 1831 | cur_level, &first_key); |
| 1832 | if (IS_ERR(eb)) { |
| 1833 | ret = PTR_ERR(eb); |
| 1834 | goto out; |
| 1835 | } else if (!extent_buffer_uptodate(eb)) { |
| 1836 | free_extent_buffer(eb); |
| 1837 | ret = -EIO; |
| 1838 | goto out; |
| 1839 | } |
| 1840 | |
| 1841 | src_path->nodes[cur_level] = eb; |
| 1842 | |
| 1843 | btrfs_tree_read_lock(eb); |
David Sterba | 300aa89 | 2018-04-04 02:00:17 +0200 | [diff] [blame] | 1844 | btrfs_set_lock_blocking_read(eb); |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1845 | src_path->locks[cur_level] = BTRFS_READ_LOCK_BLOCKING; |
| 1846 | } |
| 1847 | |
| 1848 | src_path->slots[cur_level] = dst_path->slots[cur_level]; |
| 1849 | if (cur_level) { |
| 1850 | btrfs_node_key_to_cpu(dst_path->nodes[cur_level], |
| 1851 | &dst_key, dst_path->slots[cur_level]); |
| 1852 | btrfs_node_key_to_cpu(src_path->nodes[cur_level], |
| 1853 | &src_key, src_path->slots[cur_level]); |
| 1854 | } else { |
| 1855 | btrfs_item_key_to_cpu(dst_path->nodes[cur_level], |
| 1856 | &dst_key, dst_path->slots[cur_level]); |
| 1857 | btrfs_item_key_to_cpu(src_path->nodes[cur_level], |
| 1858 | &src_key, src_path->slots[cur_level]); |
| 1859 | } |
| 1860 | /* Content mismatch, something went wrong */ |
| 1861 | if (btrfs_comp_cpu_keys(&dst_key, &src_key)) { |
| 1862 | ret = -ENOENT; |
| 1863 | goto out; |
| 1864 | } |
| 1865 | cur_level--; |
| 1866 | } |
| 1867 | |
| 1868 | /* |
| 1869 | * Now both @dst_path and @src_path have been populated, record the tree |
| 1870 | * blocks for qgroup accounting. |
| 1871 | */ |
| 1872 | ret = btrfs_qgroup_trace_extent(trans, src_path->nodes[dst_level]->start, |
| 1873 | nodesize, GFP_NOFS); |
| 1874 | if (ret < 0) |
| 1875 | goto out; |
| 1876 | ret = btrfs_qgroup_trace_extent(trans, |
| 1877 | dst_path->nodes[dst_level]->start, |
| 1878 | nodesize, GFP_NOFS); |
| 1879 | if (ret < 0) |
| 1880 | goto out; |
| 1881 | |
| 1882 | /* Record leaf file extents */ |
Qu Wenruo | 3d0174f | 2018-09-27 14:42:35 +0800 | [diff] [blame] | 1883 | if (dst_level == 0 && trace_leaf) { |
Qu Wenruo | 2598256 | 2018-09-27 14:42:30 +0800 | [diff] [blame] | 1884 | ret = btrfs_qgroup_trace_leaf_items(trans, src_path->nodes[0]); |
| 1885 | if (ret < 0) |
| 1886 | goto out; |
| 1887 | ret = btrfs_qgroup_trace_leaf_items(trans, dst_path->nodes[0]); |
| 1888 | } |
| 1889 | out: |
| 1890 | btrfs_free_path(src_path); |
| 1891 | return ret; |
| 1892 | } |
| 1893 | |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 1894 | /* |
| 1895 | * Helper function to do recursive generation-aware depth-first search, to |
| 1896 | * locate all new tree blocks in a subtree of reloc tree. |
| 1897 | * |
| 1898 | * E.g. (OO = Old tree blocks, NN = New tree blocks, whose gen == last_snapshot) |
| 1899 | * reloc tree |
| 1900 | * L2 NN (a) |
| 1901 | * / \ |
| 1902 | * L1 OO NN (b) |
| 1903 | * / \ / \ |
| 1904 | * L0 OO OO OO NN |
| 1905 | * (c) (d) |
| 1906 | * If we pass: |
| 1907 | * @dst_path = [ nodes[1] = NN(b), nodes[0] = NULL ], |
| 1908 | * @cur_level = 1 |
| 1909 | * @root_level = 1 |
| 1910 | * |
| 1911 | * We will iterate through tree blocks NN(b), NN(d) and info qgroup to trace |
| 1912 | * above tree blocks along with their counter parts in file tree. |
Andrea Gelmini | 52042d8 | 2018-11-28 12:05:13 +0100 | [diff] [blame] | 1913 | * While during search, old tree blocks OO(c) will be skipped as tree block swap |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 1914 | * won't affect OO(c). |
| 1915 | */ |
| 1916 | static int qgroup_trace_new_subtree_blocks(struct btrfs_trans_handle* trans, |
| 1917 | struct extent_buffer *src_eb, |
| 1918 | struct btrfs_path *dst_path, |
| 1919 | int cur_level, int root_level, |
Qu Wenruo | 3d0174f | 2018-09-27 14:42:35 +0800 | [diff] [blame] | 1920 | u64 last_snapshot, bool trace_leaf) |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 1921 | { |
| 1922 | struct btrfs_fs_info *fs_info = trans->fs_info; |
| 1923 | struct extent_buffer *eb; |
| 1924 | bool need_cleanup = false; |
| 1925 | int ret = 0; |
| 1926 | int i; |
| 1927 | |
| 1928 | /* Level sanity check */ |
Nikolay Borisov | 7ff2c2a | 2019-03-18 17:45:19 +0200 | [diff] [blame] | 1929 | if (cur_level < 0 || cur_level >= BTRFS_MAX_LEVEL - 1 || |
| 1930 | root_level < 0 || root_level >= BTRFS_MAX_LEVEL - 1 || |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 1931 | root_level < cur_level) { |
| 1932 | btrfs_err_rl(fs_info, |
| 1933 | "%s: bad levels, cur_level=%d root_level=%d", |
| 1934 | __func__, cur_level, root_level); |
| 1935 | return -EUCLEAN; |
| 1936 | } |
| 1937 | |
| 1938 | /* Read the tree block if needed */ |
| 1939 | if (dst_path->nodes[cur_level] == NULL) { |
| 1940 | struct btrfs_key first_key; |
| 1941 | int parent_slot; |
| 1942 | u64 child_gen; |
| 1943 | u64 child_bytenr; |
| 1944 | |
| 1945 | /* |
| 1946 | * dst_path->nodes[root_level] must be initialized before |
| 1947 | * calling this function. |
| 1948 | */ |
| 1949 | if (cur_level == root_level) { |
| 1950 | btrfs_err_rl(fs_info, |
| 1951 | "%s: dst_path->nodes[%d] not initialized, root_level=%d cur_level=%d", |
| 1952 | __func__, root_level, root_level, cur_level); |
| 1953 | return -EUCLEAN; |
| 1954 | } |
| 1955 | |
| 1956 | /* |
| 1957 | * We need to get child blockptr/gen from parent before we can |
| 1958 | * read it. |
| 1959 | */ |
| 1960 | eb = dst_path->nodes[cur_level + 1]; |
| 1961 | parent_slot = dst_path->slots[cur_level + 1]; |
| 1962 | child_bytenr = btrfs_node_blockptr(eb, parent_slot); |
| 1963 | child_gen = btrfs_node_ptr_generation(eb, parent_slot); |
| 1964 | btrfs_node_key_to_cpu(eb, &first_key, parent_slot); |
| 1965 | |
| 1966 | /* This node is old, no need to trace */ |
| 1967 | if (child_gen < last_snapshot) |
| 1968 | goto out; |
| 1969 | |
| 1970 | eb = read_tree_block(fs_info, child_bytenr, child_gen, |
| 1971 | cur_level, &first_key); |
| 1972 | if (IS_ERR(eb)) { |
| 1973 | ret = PTR_ERR(eb); |
| 1974 | goto out; |
| 1975 | } else if (!extent_buffer_uptodate(eb)) { |
| 1976 | free_extent_buffer(eb); |
| 1977 | ret = -EIO; |
| 1978 | goto out; |
| 1979 | } |
| 1980 | |
| 1981 | dst_path->nodes[cur_level] = eb; |
| 1982 | dst_path->slots[cur_level] = 0; |
| 1983 | |
| 1984 | btrfs_tree_read_lock(eb); |
David Sterba | 300aa89 | 2018-04-04 02:00:17 +0200 | [diff] [blame] | 1985 | btrfs_set_lock_blocking_read(eb); |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 1986 | dst_path->locks[cur_level] = BTRFS_READ_LOCK_BLOCKING; |
| 1987 | need_cleanup = true; |
| 1988 | } |
| 1989 | |
| 1990 | /* Now record this tree block and its counter part for qgroups */ |
| 1991 | ret = qgroup_trace_extent_swap(trans, src_eb, dst_path, cur_level, |
Qu Wenruo | 3d0174f | 2018-09-27 14:42:35 +0800 | [diff] [blame] | 1992 | root_level, trace_leaf); |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 1993 | if (ret < 0) |
| 1994 | goto cleanup; |
| 1995 | |
| 1996 | eb = dst_path->nodes[cur_level]; |
| 1997 | |
| 1998 | if (cur_level > 0) { |
| 1999 | /* Iterate all child tree blocks */ |
| 2000 | for (i = 0; i < btrfs_header_nritems(eb); i++) { |
| 2001 | /* Skip old tree blocks as they won't be swapped */ |
| 2002 | if (btrfs_node_ptr_generation(eb, i) < last_snapshot) |
| 2003 | continue; |
| 2004 | dst_path->slots[cur_level] = i; |
| 2005 | |
| 2006 | /* Recursive call (at most 7 times) */ |
| 2007 | ret = qgroup_trace_new_subtree_blocks(trans, src_eb, |
| 2008 | dst_path, cur_level - 1, root_level, |
Qu Wenruo | 3d0174f | 2018-09-27 14:42:35 +0800 | [diff] [blame] | 2009 | last_snapshot, trace_leaf); |
Qu Wenruo | ea49f3e | 2018-09-27 14:42:31 +0800 | [diff] [blame] | 2010 | if (ret < 0) |
| 2011 | goto cleanup; |
| 2012 | } |
| 2013 | } |
| 2014 | |
| 2015 | cleanup: |
| 2016 | if (need_cleanup) { |
| 2017 | /* Clean up */ |
| 2018 | btrfs_tree_unlock_rw(dst_path->nodes[cur_level], |
| 2019 | dst_path->locks[cur_level]); |
| 2020 | free_extent_buffer(dst_path->nodes[cur_level]); |
| 2021 | dst_path->nodes[cur_level] = NULL; |
| 2022 | dst_path->slots[cur_level] = 0; |
| 2023 | dst_path->locks[cur_level] = 0; |
| 2024 | } |
| 2025 | out: |
| 2026 | return ret; |
| 2027 | } |
| 2028 | |
Qu Wenruo | 5aea1a4 | 2019-01-23 15:15:15 +0800 | [diff] [blame] | 2029 | static int qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans, |
| 2030 | struct extent_buffer *src_eb, |
| 2031 | struct extent_buffer *dst_eb, |
| 2032 | u64 last_snapshot, bool trace_leaf) |
| 2033 | { |
| 2034 | struct btrfs_fs_info *fs_info = trans->fs_info; |
| 2035 | struct btrfs_path *dst_path = NULL; |
| 2036 | int level; |
| 2037 | int ret; |
| 2038 | |
| 2039 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
| 2040 | return 0; |
| 2041 | |
| 2042 | /* Wrong parameter order */ |
| 2043 | if (btrfs_header_generation(src_eb) > btrfs_header_generation(dst_eb)) { |
| 2044 | btrfs_err_rl(fs_info, |
| 2045 | "%s: bad parameter order, src_gen=%llu dst_gen=%llu", __func__, |
| 2046 | btrfs_header_generation(src_eb), |
| 2047 | btrfs_header_generation(dst_eb)); |
| 2048 | return -EUCLEAN; |
| 2049 | } |
| 2050 | |
| 2051 | if (!extent_buffer_uptodate(src_eb) || !extent_buffer_uptodate(dst_eb)) { |
| 2052 | ret = -EIO; |
| 2053 | goto out; |
| 2054 | } |
| 2055 | |
| 2056 | level = btrfs_header_level(dst_eb); |
| 2057 | dst_path = btrfs_alloc_path(); |
| 2058 | if (!dst_path) { |
| 2059 | ret = -ENOMEM; |
| 2060 | goto out; |
| 2061 | } |
| 2062 | /* For dst_path */ |
David Sterba | 67439da | 2019-10-08 13:28:47 +0200 | [diff] [blame] | 2063 | atomic_inc(&dst_eb->refs); |
Qu Wenruo | 5aea1a4 | 2019-01-23 15:15:15 +0800 | [diff] [blame] | 2064 | dst_path->nodes[level] = dst_eb; |
| 2065 | dst_path->slots[level] = 0; |
| 2066 | dst_path->locks[level] = 0; |
| 2067 | |
| 2068 | /* Do the generation aware breadth-first search */ |
| 2069 | ret = qgroup_trace_new_subtree_blocks(trans, src_eb, dst_path, level, |
| 2070 | level, last_snapshot, trace_leaf); |
| 2071 | if (ret < 0) |
| 2072 | goto out; |
| 2073 | ret = 0; |
| 2074 | |
| 2075 | out: |
| 2076 | btrfs_free_path(dst_path); |
| 2077 | if (ret < 0) |
| 2078 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 2079 | return ret; |
| 2080 | } |
| 2081 | |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2082 | int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans, |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2083 | struct extent_buffer *root_eb, |
| 2084 | u64 root_gen, int root_level) |
| 2085 | { |
Lu Fengqi | deb4062 | 2018-07-18 14:45:38 +0800 | [diff] [blame] | 2086 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2087 | int ret = 0; |
| 2088 | int level; |
| 2089 | struct extent_buffer *eb = root_eb; |
| 2090 | struct btrfs_path *path = NULL; |
| 2091 | |
Nikolay Borisov | b6e6bca | 2017-07-12 09:42:19 +0300 | [diff] [blame] | 2092 | BUG_ON(root_level < 0 || root_level >= BTRFS_MAX_LEVEL); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2093 | BUG_ON(root_eb == NULL); |
| 2094 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2095 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2096 | return 0; |
| 2097 | |
| 2098 | if (!extent_buffer_uptodate(root_eb)) { |
Qu Wenruo | 581c176 | 2018-03-29 09:08:11 +0800 | [diff] [blame] | 2099 | ret = btrfs_read_buffer(root_eb, root_gen, root_level, NULL); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2100 | if (ret) |
| 2101 | goto out; |
| 2102 | } |
| 2103 | |
| 2104 | if (root_level == 0) { |
Lu Fengqi | 8d38d7e | 2018-07-18 14:45:37 +0800 | [diff] [blame] | 2105 | ret = btrfs_qgroup_trace_leaf_items(trans, root_eb); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2106 | goto out; |
| 2107 | } |
| 2108 | |
| 2109 | path = btrfs_alloc_path(); |
| 2110 | if (!path) |
| 2111 | return -ENOMEM; |
| 2112 | |
| 2113 | /* |
| 2114 | * Walk down the tree. Missing extent blocks are filled in as |
| 2115 | * we go. Metadata is accounted every time we read a new |
| 2116 | * extent block. |
| 2117 | * |
| 2118 | * When we reach a leaf, we account for file extent items in it, |
| 2119 | * walk back up the tree (adjusting slot pointers as we go) |
| 2120 | * and restart the search process. |
| 2121 | */ |
David Sterba | 67439da | 2019-10-08 13:28:47 +0200 | [diff] [blame] | 2122 | atomic_inc(&root_eb->refs); /* For path */ |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2123 | path->nodes[root_level] = root_eb; |
| 2124 | path->slots[root_level] = 0; |
| 2125 | path->locks[root_level] = 0; /* so release_path doesn't try to unlock */ |
| 2126 | walk_down: |
| 2127 | level = root_level; |
| 2128 | while (level >= 0) { |
| 2129 | if (path->nodes[level] == NULL) { |
Qu Wenruo | 581c176 | 2018-03-29 09:08:11 +0800 | [diff] [blame] | 2130 | struct btrfs_key first_key; |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2131 | int parent_slot; |
| 2132 | u64 child_gen; |
| 2133 | u64 child_bytenr; |
| 2134 | |
| 2135 | /* |
| 2136 | * We need to get child blockptr/gen from parent before |
| 2137 | * we can read it. |
| 2138 | */ |
| 2139 | eb = path->nodes[level + 1]; |
| 2140 | parent_slot = path->slots[level + 1]; |
| 2141 | child_bytenr = btrfs_node_blockptr(eb, parent_slot); |
| 2142 | child_gen = btrfs_node_ptr_generation(eb, parent_slot); |
Qu Wenruo | 581c176 | 2018-03-29 09:08:11 +0800 | [diff] [blame] | 2143 | btrfs_node_key_to_cpu(eb, &first_key, parent_slot); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2144 | |
Qu Wenruo | 581c176 | 2018-03-29 09:08:11 +0800 | [diff] [blame] | 2145 | eb = read_tree_block(fs_info, child_bytenr, child_gen, |
| 2146 | level, &first_key); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2147 | if (IS_ERR(eb)) { |
| 2148 | ret = PTR_ERR(eb); |
| 2149 | goto out; |
| 2150 | } else if (!extent_buffer_uptodate(eb)) { |
| 2151 | free_extent_buffer(eb); |
| 2152 | ret = -EIO; |
| 2153 | goto out; |
| 2154 | } |
| 2155 | |
| 2156 | path->nodes[level] = eb; |
| 2157 | path->slots[level] = 0; |
| 2158 | |
| 2159 | btrfs_tree_read_lock(eb); |
David Sterba | 300aa89 | 2018-04-04 02:00:17 +0200 | [diff] [blame] | 2160 | btrfs_set_lock_blocking_read(eb); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2161 | path->locks[level] = BTRFS_READ_LOCK_BLOCKING; |
| 2162 | |
Lu Fengqi | a95f3aa | 2018-07-18 16:28:03 +0800 | [diff] [blame] | 2163 | ret = btrfs_qgroup_trace_extent(trans, child_bytenr, |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2164 | fs_info->nodesize, |
| 2165 | GFP_NOFS); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2166 | if (ret) |
| 2167 | goto out; |
| 2168 | } |
| 2169 | |
| 2170 | if (level == 0) { |
Lu Fengqi | 8d38d7e | 2018-07-18 14:45:37 +0800 | [diff] [blame] | 2171 | ret = btrfs_qgroup_trace_leaf_items(trans, |
| 2172 | path->nodes[level]); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2173 | if (ret) |
| 2174 | goto out; |
| 2175 | |
| 2176 | /* Nonzero return here means we completed our search */ |
David Sterba | 15b3451 | 2017-02-10 20:30:23 +0100 | [diff] [blame] | 2177 | ret = adjust_slots_upwards(path, root_level); |
Qu Wenruo | 33d1f05 | 2016-10-18 09:31:28 +0800 | [diff] [blame] | 2178 | if (ret) |
| 2179 | break; |
| 2180 | |
| 2181 | /* Restart search with new slots */ |
| 2182 | goto walk_down; |
| 2183 | } |
| 2184 | |
| 2185 | level--; |
| 2186 | } |
| 2187 | |
| 2188 | ret = 0; |
| 2189 | out: |
| 2190 | btrfs_free_path(path); |
| 2191 | |
| 2192 | return ret; |
| 2193 | } |
| 2194 | |
Qu Wenruo | d810ef2 | 2015-04-12 16:52:34 +0800 | [diff] [blame] | 2195 | #define UPDATE_NEW 0 |
| 2196 | #define UPDATE_OLD 1 |
| 2197 | /* |
| 2198 | * Walk all of the roots that points to the bytenr and adjust their refcnts. |
| 2199 | */ |
| 2200 | static int qgroup_update_refcnt(struct btrfs_fs_info *fs_info, |
| 2201 | struct ulist *roots, struct ulist *tmp, |
| 2202 | struct ulist *qgroups, u64 seq, int update_old) |
| 2203 | { |
| 2204 | struct ulist_node *unode; |
| 2205 | struct ulist_iterator uiter; |
| 2206 | struct ulist_node *tmp_unode; |
| 2207 | struct ulist_iterator tmp_uiter; |
| 2208 | struct btrfs_qgroup *qg; |
| 2209 | int ret = 0; |
| 2210 | |
| 2211 | if (!roots) |
| 2212 | return 0; |
| 2213 | ULIST_ITER_INIT(&uiter); |
| 2214 | while ((unode = ulist_next(roots, &uiter))) { |
| 2215 | qg = find_qgroup_rb(fs_info, unode->val); |
| 2216 | if (!qg) |
| 2217 | continue; |
| 2218 | |
| 2219 | ulist_reinit(tmp); |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2220 | ret = ulist_add(qgroups, qg->qgroupid, qgroup_to_aux(qg), |
Qu Wenruo | d810ef2 | 2015-04-12 16:52:34 +0800 | [diff] [blame] | 2221 | GFP_ATOMIC); |
| 2222 | if (ret < 0) |
| 2223 | return ret; |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2224 | ret = ulist_add(tmp, qg->qgroupid, qgroup_to_aux(qg), GFP_ATOMIC); |
Qu Wenruo | d810ef2 | 2015-04-12 16:52:34 +0800 | [diff] [blame] | 2225 | if (ret < 0) |
| 2226 | return ret; |
| 2227 | ULIST_ITER_INIT(&tmp_uiter); |
| 2228 | while ((tmp_unode = ulist_next(tmp, &tmp_uiter))) { |
| 2229 | struct btrfs_qgroup_list *glist; |
| 2230 | |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2231 | qg = unode_aux_to_qgroup(tmp_unode); |
Qu Wenruo | d810ef2 | 2015-04-12 16:52:34 +0800 | [diff] [blame] | 2232 | if (update_old) |
| 2233 | btrfs_qgroup_update_old_refcnt(qg, seq, 1); |
| 2234 | else |
| 2235 | btrfs_qgroup_update_new_refcnt(qg, seq, 1); |
| 2236 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 2237 | ret = ulist_add(qgroups, glist->group->qgroupid, |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2238 | qgroup_to_aux(glist->group), |
Qu Wenruo | d810ef2 | 2015-04-12 16:52:34 +0800 | [diff] [blame] | 2239 | GFP_ATOMIC); |
| 2240 | if (ret < 0) |
| 2241 | return ret; |
| 2242 | ret = ulist_add(tmp, glist->group->qgroupid, |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2243 | qgroup_to_aux(glist->group), |
Qu Wenruo | d810ef2 | 2015-04-12 16:52:34 +0800 | [diff] [blame] | 2244 | GFP_ATOMIC); |
| 2245 | if (ret < 0) |
| 2246 | return ret; |
| 2247 | } |
| 2248 | } |
| 2249 | } |
| 2250 | return 0; |
| 2251 | } |
| 2252 | |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2253 | /* |
Qu Wenruo | 823ae5b | 2015-04-12 16:59:57 +0800 | [diff] [blame] | 2254 | * Update qgroup rfer/excl counters. |
| 2255 | * Rfer update is easy, codes can explain themselves. |
Qu Wenruo | e69bcee | 2015-04-17 10:23:16 +0800 | [diff] [blame] | 2256 | * |
Qu Wenruo | 823ae5b | 2015-04-12 16:59:57 +0800 | [diff] [blame] | 2257 | * Excl update is tricky, the update is split into 2 part. |
| 2258 | * Part 1: Possible exclusive <-> sharing detect: |
| 2259 | * | A | !A | |
| 2260 | * ------------------------------------- |
| 2261 | * B | * | - | |
| 2262 | * ------------------------------------- |
| 2263 | * !B | + | ** | |
| 2264 | * ------------------------------------- |
| 2265 | * |
| 2266 | * Conditions: |
| 2267 | * A: cur_old_roots < nr_old_roots (not exclusive before) |
| 2268 | * !A: cur_old_roots == nr_old_roots (possible exclusive before) |
| 2269 | * B: cur_new_roots < nr_new_roots (not exclusive now) |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 2270 | * !B: cur_new_roots == nr_new_roots (possible exclusive now) |
Qu Wenruo | 823ae5b | 2015-04-12 16:59:57 +0800 | [diff] [blame] | 2271 | * |
| 2272 | * Results: |
| 2273 | * +: Possible sharing -> exclusive -: Possible exclusive -> sharing |
| 2274 | * *: Definitely not changed. **: Possible unchanged. |
| 2275 | * |
| 2276 | * For !A and !B condition, the exception is cur_old/new_roots == 0 case. |
| 2277 | * |
| 2278 | * To make the logic clear, we first use condition A and B to split |
| 2279 | * combination into 4 results. |
| 2280 | * |
| 2281 | * Then, for result "+" and "-", check old/new_roots == 0 case, as in them |
| 2282 | * only on variant maybe 0. |
| 2283 | * |
| 2284 | * Lastly, check result **, since there are 2 variants maybe 0, split them |
| 2285 | * again(2x2). |
| 2286 | * But this time we don't need to consider other things, the codes and logic |
| 2287 | * is easy to understand now. |
| 2288 | */ |
| 2289 | static int qgroup_update_counters(struct btrfs_fs_info *fs_info, |
| 2290 | struct ulist *qgroups, |
| 2291 | u64 nr_old_roots, |
| 2292 | u64 nr_new_roots, |
| 2293 | u64 num_bytes, u64 seq) |
| 2294 | { |
| 2295 | struct ulist_node *unode; |
| 2296 | struct ulist_iterator uiter; |
| 2297 | struct btrfs_qgroup *qg; |
| 2298 | u64 cur_new_count, cur_old_count; |
| 2299 | |
| 2300 | ULIST_ITER_INIT(&uiter); |
| 2301 | while ((unode = ulist_next(qgroups, &uiter))) { |
| 2302 | bool dirty = false; |
| 2303 | |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2304 | qg = unode_aux_to_qgroup(unode); |
Qu Wenruo | 823ae5b | 2015-04-12 16:59:57 +0800 | [diff] [blame] | 2305 | cur_old_count = btrfs_qgroup_get_old_refcnt(qg, seq); |
| 2306 | cur_new_count = btrfs_qgroup_get_new_refcnt(qg, seq); |
| 2307 | |
Qu Wenruo | 8b31790 | 2018-04-30 15:04:44 +0800 | [diff] [blame] | 2308 | trace_qgroup_update_counters(fs_info, qg, cur_old_count, |
| 2309 | cur_new_count); |
Mark Fasheh | 0f5dcf8 | 2016-03-29 17:19:55 -0700 | [diff] [blame] | 2310 | |
Qu Wenruo | 823ae5b | 2015-04-12 16:59:57 +0800 | [diff] [blame] | 2311 | /* Rfer update part */ |
| 2312 | if (cur_old_count == 0 && cur_new_count > 0) { |
| 2313 | qg->rfer += num_bytes; |
| 2314 | qg->rfer_cmpr += num_bytes; |
| 2315 | dirty = true; |
| 2316 | } |
| 2317 | if (cur_old_count > 0 && cur_new_count == 0) { |
| 2318 | qg->rfer -= num_bytes; |
| 2319 | qg->rfer_cmpr -= num_bytes; |
| 2320 | dirty = true; |
| 2321 | } |
| 2322 | |
| 2323 | /* Excl update part */ |
| 2324 | /* Exclusive/none -> shared case */ |
| 2325 | if (cur_old_count == nr_old_roots && |
| 2326 | cur_new_count < nr_new_roots) { |
| 2327 | /* Exclusive -> shared */ |
| 2328 | if (cur_old_count != 0) { |
| 2329 | qg->excl -= num_bytes; |
| 2330 | qg->excl_cmpr -= num_bytes; |
| 2331 | dirty = true; |
| 2332 | } |
| 2333 | } |
| 2334 | |
| 2335 | /* Shared -> exclusive/none case */ |
| 2336 | if (cur_old_count < nr_old_roots && |
| 2337 | cur_new_count == nr_new_roots) { |
| 2338 | /* Shared->exclusive */ |
| 2339 | if (cur_new_count != 0) { |
| 2340 | qg->excl += num_bytes; |
| 2341 | qg->excl_cmpr += num_bytes; |
| 2342 | dirty = true; |
| 2343 | } |
| 2344 | } |
| 2345 | |
| 2346 | /* Exclusive/none -> exclusive/none case */ |
| 2347 | if (cur_old_count == nr_old_roots && |
| 2348 | cur_new_count == nr_new_roots) { |
| 2349 | if (cur_old_count == 0) { |
| 2350 | /* None -> exclusive/none */ |
| 2351 | |
| 2352 | if (cur_new_count != 0) { |
| 2353 | /* None -> exclusive */ |
| 2354 | qg->excl += num_bytes; |
| 2355 | qg->excl_cmpr += num_bytes; |
| 2356 | dirty = true; |
| 2357 | } |
| 2358 | /* None -> none, nothing changed */ |
| 2359 | } else { |
| 2360 | /* Exclusive -> exclusive/none */ |
| 2361 | |
| 2362 | if (cur_new_count == 0) { |
| 2363 | /* Exclusive -> none */ |
| 2364 | qg->excl -= num_bytes; |
| 2365 | qg->excl_cmpr -= num_bytes; |
| 2366 | dirty = true; |
| 2367 | } |
| 2368 | /* Exclusive -> exclusive, nothing changed */ |
| 2369 | } |
| 2370 | } |
Qu Wenruo | c05f942 | 2015-08-03 14:44:29 +0800 | [diff] [blame] | 2371 | |
Qu Wenruo | 823ae5b | 2015-04-12 16:59:57 +0800 | [diff] [blame] | 2372 | if (dirty) |
| 2373 | qgroup_dirty(fs_info, qg); |
| 2374 | } |
| 2375 | return 0; |
| 2376 | } |
| 2377 | |
Qu Wenruo | 5edfd9f | 2017-02-27 15:10:34 +0800 | [diff] [blame] | 2378 | /* |
| 2379 | * Check if the @roots potentially is a list of fs tree roots |
| 2380 | * |
| 2381 | * Return 0 for definitely not a fs/subvol tree roots ulist |
| 2382 | * Return 1 for possible fs/subvol tree roots in the list (considering an empty |
| 2383 | * one as well) |
| 2384 | */ |
| 2385 | static int maybe_fs_roots(struct ulist *roots) |
| 2386 | { |
| 2387 | struct ulist_node *unode; |
| 2388 | struct ulist_iterator uiter; |
| 2389 | |
| 2390 | /* Empty one, still possible for fs roots */ |
| 2391 | if (!roots || roots->nnodes == 0) |
| 2392 | return 1; |
| 2393 | |
| 2394 | ULIST_ITER_INIT(&uiter); |
| 2395 | unode = ulist_next(roots, &uiter); |
| 2396 | if (!unode) |
| 2397 | return 1; |
| 2398 | |
| 2399 | /* |
| 2400 | * If it contains fs tree roots, then it must belong to fs/subvol |
| 2401 | * trees. |
| 2402 | * If it contains a non-fs tree, it won't be shared with fs/subvol trees. |
| 2403 | */ |
| 2404 | return is_fstree(unode->val); |
| 2405 | } |
| 2406 | |
Lu Fengqi | 8696d76 | 2018-07-18 14:45:39 +0800 | [diff] [blame] | 2407 | int btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans, u64 bytenr, |
| 2408 | u64 num_bytes, struct ulist *old_roots, |
| 2409 | struct ulist *new_roots) |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2410 | { |
Lu Fengqi | 8696d76 | 2018-07-18 14:45:39 +0800 | [diff] [blame] | 2411 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2412 | struct ulist *qgroups = NULL; |
| 2413 | struct ulist *tmp = NULL; |
| 2414 | u64 seq; |
| 2415 | u64 nr_new_roots = 0; |
| 2416 | u64 nr_old_roots = 0; |
| 2417 | int ret = 0; |
| 2418 | |
Johannes Thumshirn | 26ef849 | 2020-01-08 21:07:32 +0900 | [diff] [blame] | 2419 | /* |
| 2420 | * If quotas get disabled meanwhile, the resouces need to be freed and |
| 2421 | * we can't just exit here. |
| 2422 | */ |
David Sterba | 81353d5 | 2017-02-13 14:05:24 +0100 | [diff] [blame] | 2423 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
Johannes Thumshirn | 26ef849 | 2020-01-08 21:07:32 +0900 | [diff] [blame] | 2424 | goto out_free; |
David Sterba | 81353d5 | 2017-02-13 14:05:24 +0100 | [diff] [blame] | 2425 | |
Qu Wenruo | 5edfd9f | 2017-02-27 15:10:34 +0800 | [diff] [blame] | 2426 | if (new_roots) { |
| 2427 | if (!maybe_fs_roots(new_roots)) |
| 2428 | goto out_free; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2429 | nr_new_roots = new_roots->nnodes; |
Qu Wenruo | 5edfd9f | 2017-02-27 15:10:34 +0800 | [diff] [blame] | 2430 | } |
| 2431 | if (old_roots) { |
| 2432 | if (!maybe_fs_roots(old_roots)) |
| 2433 | goto out_free; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2434 | nr_old_roots = old_roots->nnodes; |
Qu Wenruo | 5edfd9f | 2017-02-27 15:10:34 +0800 | [diff] [blame] | 2435 | } |
| 2436 | |
| 2437 | /* Quick exit, either not fs tree roots, or won't affect any qgroup */ |
| 2438 | if (nr_old_roots == 0 && nr_new_roots == 0) |
| 2439 | goto out_free; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2440 | |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2441 | BUG_ON(!fs_info->quota_root); |
| 2442 | |
Qu Wenruo | c9f6f3c | 2018-05-03 09:59:02 +0800 | [diff] [blame] | 2443 | trace_btrfs_qgroup_account_extent(fs_info, trans->transid, bytenr, |
| 2444 | num_bytes, nr_old_roots, nr_new_roots); |
Mark Fasheh | 0f5dcf8 | 2016-03-29 17:19:55 -0700 | [diff] [blame] | 2445 | |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2446 | qgroups = ulist_alloc(GFP_NOFS); |
| 2447 | if (!qgroups) { |
| 2448 | ret = -ENOMEM; |
| 2449 | goto out_free; |
| 2450 | } |
| 2451 | tmp = ulist_alloc(GFP_NOFS); |
| 2452 | if (!tmp) { |
| 2453 | ret = -ENOMEM; |
| 2454 | goto out_free; |
| 2455 | } |
| 2456 | |
| 2457 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 2458 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { |
| 2459 | if (fs_info->qgroup_rescan_progress.objectid <= bytenr) { |
| 2460 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2461 | ret = 0; |
| 2462 | goto out_free; |
| 2463 | } |
| 2464 | } |
| 2465 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 2466 | |
| 2467 | spin_lock(&fs_info->qgroup_lock); |
| 2468 | seq = fs_info->qgroup_seq; |
| 2469 | |
| 2470 | /* Update old refcnts using old_roots */ |
| 2471 | ret = qgroup_update_refcnt(fs_info, old_roots, tmp, qgroups, seq, |
| 2472 | UPDATE_OLD); |
| 2473 | if (ret < 0) |
| 2474 | goto out; |
| 2475 | |
| 2476 | /* Update new refcnts using new_roots */ |
| 2477 | ret = qgroup_update_refcnt(fs_info, new_roots, tmp, qgroups, seq, |
| 2478 | UPDATE_NEW); |
| 2479 | if (ret < 0) |
| 2480 | goto out; |
| 2481 | |
| 2482 | qgroup_update_counters(fs_info, qgroups, nr_old_roots, nr_new_roots, |
| 2483 | num_bytes, seq); |
| 2484 | |
| 2485 | /* |
| 2486 | * Bump qgroup_seq to avoid seq overlap |
| 2487 | */ |
| 2488 | fs_info->qgroup_seq += max(nr_old_roots, nr_new_roots) + 1; |
| 2489 | out: |
| 2490 | spin_unlock(&fs_info->qgroup_lock); |
| 2491 | out_free: |
| 2492 | ulist_free(tmp); |
| 2493 | ulist_free(qgroups); |
| 2494 | ulist_free(old_roots); |
| 2495 | ulist_free(new_roots); |
| 2496 | return ret; |
| 2497 | } |
| 2498 | |
Nikolay Borisov | 460fb20 | 2018-03-15 16:00:25 +0200 | [diff] [blame] | 2499 | int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans) |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2500 | { |
Nikolay Borisov | 460fb20 | 2018-03-15 16:00:25 +0200 | [diff] [blame] | 2501 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2502 | struct btrfs_qgroup_extent_record *record; |
| 2503 | struct btrfs_delayed_ref_root *delayed_refs; |
| 2504 | struct ulist *new_roots = NULL; |
| 2505 | struct rb_node *node; |
Qu Wenruo | c337e7b | 2018-09-27 14:42:29 +0800 | [diff] [blame] | 2506 | u64 num_dirty_extents = 0; |
Qu Wenruo | 9086db8 | 2015-04-20 09:53:50 +0800 | [diff] [blame] | 2507 | u64 qgroup_to_skip; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2508 | int ret = 0; |
| 2509 | |
| 2510 | delayed_refs = &trans->transaction->delayed_refs; |
Qu Wenruo | 9086db8 | 2015-04-20 09:53:50 +0800 | [diff] [blame] | 2511 | qgroup_to_skip = delayed_refs->qgroup_to_skip; |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2512 | while ((node = rb_first(&delayed_refs->dirty_extent_root))) { |
| 2513 | record = rb_entry(node, struct btrfs_qgroup_extent_record, |
| 2514 | node); |
| 2515 | |
Qu Wenruo | c337e7b | 2018-09-27 14:42:29 +0800 | [diff] [blame] | 2516 | num_dirty_extents++; |
Jeff Mahoney | bc07452 | 2016-06-09 17:27:55 -0400 | [diff] [blame] | 2517 | trace_btrfs_qgroup_account_extents(fs_info, record); |
Mark Fasheh | 0f5dcf8 | 2016-03-29 17:19:55 -0700 | [diff] [blame] | 2518 | |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2519 | if (!ret) { |
| 2520 | /* |
Qu Wenruo | d1b8b94 | 2017-02-27 15:10:35 +0800 | [diff] [blame] | 2521 | * Old roots should be searched when inserting qgroup |
| 2522 | * extent record |
| 2523 | */ |
| 2524 | if (WARN_ON(!record->old_roots)) { |
| 2525 | /* Search commit root to find old_roots */ |
| 2526 | ret = btrfs_find_all_roots(NULL, fs_info, |
| 2527 | record->bytenr, 0, |
Zygo Blaxell | c995ab3 | 2017-09-22 13:58:45 -0400 | [diff] [blame] | 2528 | &record->old_roots, false); |
Qu Wenruo | d1b8b94 | 2017-02-27 15:10:35 +0800 | [diff] [blame] | 2529 | if (ret < 0) |
| 2530 | goto cleanup; |
| 2531 | } |
| 2532 | |
Qu Wenruo | 1418bae | 2019-01-23 15:15:12 +0800 | [diff] [blame] | 2533 | /* Free the reserved data space */ |
| 2534 | btrfs_qgroup_free_refroot(fs_info, |
| 2535 | record->data_rsv_refroot, |
| 2536 | record->data_rsv, |
| 2537 | BTRFS_QGROUP_RSV_DATA); |
Qu Wenruo | d1b8b94 | 2017-02-27 15:10:35 +0800 | [diff] [blame] | 2538 | /* |
Edmund Nadolski | de47c9d | 2017-03-16 10:04:34 -0600 | [diff] [blame] | 2539 | * Use SEQ_LAST as time_seq to do special search, which |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2540 | * doesn't lock tree or delayed_refs and search current |
| 2541 | * root. It's safe inside commit_transaction(). |
| 2542 | */ |
| 2543 | ret = btrfs_find_all_roots(trans, fs_info, |
Zygo Blaxell | c995ab3 | 2017-09-22 13:58:45 -0400 | [diff] [blame] | 2544 | record->bytenr, SEQ_LAST, &new_roots, false); |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2545 | if (ret < 0) |
| 2546 | goto cleanup; |
Qu Wenruo | d1b8b94 | 2017-02-27 15:10:35 +0800 | [diff] [blame] | 2547 | if (qgroup_to_skip) { |
Qu Wenruo | 9086db8 | 2015-04-20 09:53:50 +0800 | [diff] [blame] | 2548 | ulist_del(new_roots, qgroup_to_skip, 0); |
Qu Wenruo | d1b8b94 | 2017-02-27 15:10:35 +0800 | [diff] [blame] | 2549 | ulist_del(record->old_roots, qgroup_to_skip, |
| 2550 | 0); |
| 2551 | } |
Lu Fengqi | 8696d76 | 2018-07-18 14:45:39 +0800 | [diff] [blame] | 2552 | ret = btrfs_qgroup_account_extent(trans, record->bytenr, |
| 2553 | record->num_bytes, |
| 2554 | record->old_roots, |
| 2555 | new_roots); |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2556 | record->old_roots = NULL; |
| 2557 | new_roots = NULL; |
| 2558 | } |
| 2559 | cleanup: |
| 2560 | ulist_free(record->old_roots); |
| 2561 | ulist_free(new_roots); |
| 2562 | new_roots = NULL; |
| 2563 | rb_erase(node, &delayed_refs->dirty_extent_root); |
| 2564 | kfree(record); |
| 2565 | |
| 2566 | } |
Qu Wenruo | c337e7b | 2018-09-27 14:42:29 +0800 | [diff] [blame] | 2567 | trace_qgroup_num_dirty_extents(fs_info, trans->transid, |
| 2568 | num_dirty_extents); |
Qu Wenruo | 550d7a2 | 2015-04-16 15:37:33 +0800 | [diff] [blame] | 2569 | return ret; |
| 2570 | } |
| 2571 | |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2572 | /* |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2573 | * called from commit_transaction. Writes all changed qgroups to disk. |
| 2574 | */ |
Lu Fengqi | 280f8bd | 2018-07-18 14:45:40 +0800 | [diff] [blame] | 2575 | int btrfs_run_qgroups(struct btrfs_trans_handle *trans) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2576 | { |
Lu Fengqi | 280f8bd | 2018-07-18 14:45:40 +0800 | [diff] [blame] | 2577 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2578 | int ret = 0; |
| 2579 | |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 2580 | if (!fs_info->quota_root) |
Nikolay Borisov | 5d23515 | 2018-01-31 10:52:04 +0200 | [diff] [blame] | 2581 | return ret; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2582 | |
| 2583 | spin_lock(&fs_info->qgroup_lock); |
| 2584 | while (!list_empty(&fs_info->dirty_qgroups)) { |
| 2585 | struct btrfs_qgroup *qgroup; |
| 2586 | qgroup = list_first_entry(&fs_info->dirty_qgroups, |
| 2587 | struct btrfs_qgroup, dirty); |
| 2588 | list_del_init(&qgroup->dirty); |
| 2589 | spin_unlock(&fs_info->qgroup_lock); |
Lu Fengqi | 3e07e9a | 2018-07-18 14:45:28 +0800 | [diff] [blame] | 2590 | ret = update_qgroup_info_item(trans, qgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2591 | if (ret) |
| 2592 | fs_info->qgroup_flags |= |
| 2593 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
Lu Fengqi | ac8a866 | 2018-07-18 14:45:27 +0800 | [diff] [blame] | 2594 | ret = update_qgroup_limit_item(trans, qgroup); |
Dongsheng Yang | d3001ed | 2014-11-20 21:04:56 -0500 | [diff] [blame] | 2595 | if (ret) |
| 2596 | fs_info->qgroup_flags |= |
| 2597 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2598 | spin_lock(&fs_info->qgroup_lock); |
| 2599 | } |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 2600 | if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2601 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_ON; |
| 2602 | else |
| 2603 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_ON; |
| 2604 | spin_unlock(&fs_info->qgroup_lock); |
| 2605 | |
Lu Fengqi | 2e980ac | 2018-07-18 14:45:29 +0800 | [diff] [blame] | 2606 | ret = update_qgroup_status_item(trans); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2607 | if (ret) |
| 2608 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 2609 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2610 | return ret; |
| 2611 | } |
| 2612 | |
| 2613 | /* |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 2614 | * Copy the accounting information between qgroups. This is necessary |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2615 | * when a snapshot or a subvolume is created. Throwing an error will |
| 2616 | * cause a transaction abort so we take extra care here to only error |
| 2617 | * when a readonly fs is a reasonable outcome. |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2618 | */ |
Lu Fengqi | a9377422 | 2018-07-18 14:45:41 +0800 | [diff] [blame] | 2619 | int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid, |
| 2620 | u64 objectid, struct btrfs_qgroup_inherit *inherit) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2621 | { |
| 2622 | int ret = 0; |
| 2623 | int i; |
| 2624 | u64 *i_qgroups; |
Qu Wenruo | e88439d | 2019-06-13 17:31:24 +0800 | [diff] [blame] | 2625 | bool committing = false; |
Lu Fengqi | a9377422 | 2018-07-18 14:45:41 +0800 | [diff] [blame] | 2626 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Filipe Manana | 552f032 | 2018-11-19 16:20:34 +0000 | [diff] [blame] | 2627 | struct btrfs_root *quota_root; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2628 | struct btrfs_qgroup *srcgroup; |
| 2629 | struct btrfs_qgroup *dstgroup; |
| 2630 | u32 level_size = 0; |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 2631 | u64 nums; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2632 | |
Qu Wenruo | e88439d | 2019-06-13 17:31:24 +0800 | [diff] [blame] | 2633 | /* |
| 2634 | * There are only two callers of this function. |
| 2635 | * |
| 2636 | * One in create_subvol() in the ioctl context, which needs to hold |
| 2637 | * the qgroup_ioctl_lock. |
| 2638 | * |
| 2639 | * The other one in create_pending_snapshot() where no other qgroup |
| 2640 | * code can modify the fs as they all need to either start a new trans |
| 2641 | * or hold a trans handler, thus we don't need to hold |
| 2642 | * qgroup_ioctl_lock. |
| 2643 | * This would avoid long and complex lock chain and make lockdep happy. |
| 2644 | */ |
| 2645 | spin_lock(&fs_info->trans_lock); |
| 2646 | if (trans->transaction->state == TRANS_STATE_COMMIT_DOING) |
| 2647 | committing = true; |
| 2648 | spin_unlock(&fs_info->trans_lock); |
| 2649 | |
| 2650 | if (!committing) |
| 2651 | mutex_lock(&fs_info->qgroup_ioctl_lock); |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 2652 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 2653 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2654 | |
Filipe Manana | 552f032 | 2018-11-19 16:20:34 +0000 | [diff] [blame] | 2655 | quota_root = fs_info->quota_root; |
Wang Shilong | f2f6ed3 | 2013-04-07 10:50:16 +0000 | [diff] [blame] | 2656 | if (!quota_root) { |
| 2657 | ret = -EINVAL; |
| 2658 | goto out; |
| 2659 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2660 | |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 2661 | if (inherit) { |
| 2662 | i_qgroups = (u64 *)(inherit + 1); |
| 2663 | nums = inherit->num_qgroups + 2 * inherit->num_ref_copies + |
| 2664 | 2 * inherit->num_excl_copies; |
| 2665 | for (i = 0; i < nums; ++i) { |
| 2666 | srcgroup = find_qgroup_rb(fs_info, *i_qgroups); |
Dongsheng Yang | 09870d2 | 2014-11-11 07:18:22 -0500 | [diff] [blame] | 2667 | |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2668 | /* |
| 2669 | * Zero out invalid groups so we can ignore |
| 2670 | * them later. |
| 2671 | */ |
| 2672 | if (!srcgroup || |
| 2673 | ((srcgroup->qgroupid >> 48) <= (objectid >> 48))) |
| 2674 | *i_qgroups = 0ULL; |
| 2675 | |
Wang Shilong | 3f5e2d3 | 2013-04-07 10:50:19 +0000 | [diff] [blame] | 2676 | ++i_qgroups; |
| 2677 | } |
| 2678 | } |
| 2679 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2680 | /* |
| 2681 | * create a tracking group for the subvol itself |
| 2682 | */ |
| 2683 | ret = add_qgroup_item(trans, quota_root, objectid); |
| 2684 | if (ret) |
| 2685 | goto out; |
| 2686 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2687 | /* |
| 2688 | * add qgroup to all inherited groups |
| 2689 | */ |
| 2690 | if (inherit) { |
| 2691 | i_qgroups = (u64 *)(inherit + 1); |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2692 | for (i = 0; i < inherit->num_qgroups; ++i, ++i_qgroups) { |
| 2693 | if (*i_qgroups == 0) |
| 2694 | continue; |
Lu Fengqi | 711169c | 2018-07-18 14:45:24 +0800 | [diff] [blame] | 2695 | ret = add_qgroup_relation_item(trans, objectid, |
| 2696 | *i_qgroups); |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2697 | if (ret && ret != -EEXIST) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2698 | goto out; |
Lu Fengqi | 711169c | 2018-07-18 14:45:24 +0800 | [diff] [blame] | 2699 | ret = add_qgroup_relation_item(trans, *i_qgroups, |
| 2700 | objectid); |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2701 | if (ret && ret != -EEXIST) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2702 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2703 | } |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2704 | ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2705 | } |
| 2706 | |
| 2707 | |
| 2708 | spin_lock(&fs_info->qgroup_lock); |
| 2709 | |
| 2710 | dstgroup = add_qgroup_rb(fs_info, objectid); |
Dan Carpenter | 57a5a88 | 2012-07-30 02:15:43 -0600 | [diff] [blame] | 2711 | if (IS_ERR(dstgroup)) { |
| 2712 | ret = PTR_ERR(dstgroup); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2713 | goto unlock; |
Dan Carpenter | 57a5a88 | 2012-07-30 02:15:43 -0600 | [diff] [blame] | 2714 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2715 | |
Dongsheng Yang | e8c8541 | 2014-11-20 20:58:34 -0500 | [diff] [blame] | 2716 | if (inherit && inherit->flags & BTRFS_QGROUP_INHERIT_SET_LIMITS) { |
Dongsheng Yang | e8c8541 | 2014-11-20 20:58:34 -0500 | [diff] [blame] | 2717 | dstgroup->lim_flags = inherit->lim.flags; |
| 2718 | dstgroup->max_rfer = inherit->lim.max_rfer; |
| 2719 | dstgroup->max_excl = inherit->lim.max_excl; |
| 2720 | dstgroup->rsv_rfer = inherit->lim.rsv_rfer; |
| 2721 | dstgroup->rsv_excl = inherit->lim.rsv_excl; |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 2722 | |
Lu Fengqi | ac8a866 | 2018-07-18 14:45:27 +0800 | [diff] [blame] | 2723 | ret = update_qgroup_limit_item(trans, dstgroup); |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 2724 | if (ret) { |
| 2725 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
Jeff Mahoney | 5d163e0 | 2016-09-20 10:05:00 -0400 | [diff] [blame] | 2726 | btrfs_info(fs_info, |
| 2727 | "unable to update quota limit for %llu", |
| 2728 | dstgroup->qgroupid); |
Dongsheng Yang | 1510e71 | 2014-11-20 21:01:41 -0500 | [diff] [blame] | 2729 | goto unlock; |
| 2730 | } |
Dongsheng Yang | e8c8541 | 2014-11-20 20:58:34 -0500 | [diff] [blame] | 2731 | } |
| 2732 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2733 | if (srcid) { |
| 2734 | srcgroup = find_qgroup_rb(fs_info, srcid); |
Chris Mason | f3a87f1 | 2012-09-14 20:06:30 -0400 | [diff] [blame] | 2735 | if (!srcgroup) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2736 | goto unlock; |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2737 | |
| 2738 | /* |
| 2739 | * We call inherit after we clone the root in order to make sure |
| 2740 | * our counts don't go crazy, so at this point the only |
| 2741 | * difference between the two roots should be the root node. |
| 2742 | */ |
Lu Fengqi | c8389d4 | 2018-07-17 16:58:22 +0800 | [diff] [blame] | 2743 | level_size = fs_info->nodesize; |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 2744 | dstgroup->rfer = srcgroup->rfer; |
| 2745 | dstgroup->rfer_cmpr = srcgroup->rfer_cmpr; |
| 2746 | dstgroup->excl = level_size; |
| 2747 | dstgroup->excl_cmpr = level_size; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2748 | srcgroup->excl = level_size; |
| 2749 | srcgroup->excl_cmpr = level_size; |
Dongsheng Yang | 3eeb4d5 | 2014-11-20 20:14:38 -0500 | [diff] [blame] | 2750 | |
| 2751 | /* inherit the limit info */ |
| 2752 | dstgroup->lim_flags = srcgroup->lim_flags; |
| 2753 | dstgroup->max_rfer = srcgroup->max_rfer; |
| 2754 | dstgroup->max_excl = srcgroup->max_excl; |
| 2755 | dstgroup->rsv_rfer = srcgroup->rsv_rfer; |
| 2756 | dstgroup->rsv_excl = srcgroup->rsv_excl; |
| 2757 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2758 | qgroup_dirty(fs_info, dstgroup); |
| 2759 | qgroup_dirty(fs_info, srcgroup); |
| 2760 | } |
| 2761 | |
Chris Mason | f3a87f1 | 2012-09-14 20:06:30 -0400 | [diff] [blame] | 2762 | if (!inherit) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2763 | goto unlock; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2764 | |
| 2765 | i_qgroups = (u64 *)(inherit + 1); |
| 2766 | for (i = 0; i < inherit->num_qgroups; ++i) { |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2767 | if (*i_qgroups) { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 2768 | ret = add_relation_rb(fs_info, objectid, *i_qgroups); |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2769 | if (ret) |
| 2770 | goto unlock; |
| 2771 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2772 | ++i_qgroups; |
| 2773 | } |
| 2774 | |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2775 | for (i = 0; i < inherit->num_ref_copies; ++i, i_qgroups += 2) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2776 | struct btrfs_qgroup *src; |
| 2777 | struct btrfs_qgroup *dst; |
| 2778 | |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2779 | if (!i_qgroups[0] || !i_qgroups[1]) |
| 2780 | continue; |
| 2781 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2782 | src = find_qgroup_rb(fs_info, i_qgroups[0]); |
| 2783 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); |
| 2784 | |
| 2785 | if (!src || !dst) { |
| 2786 | ret = -EINVAL; |
| 2787 | goto unlock; |
| 2788 | } |
| 2789 | |
| 2790 | dst->rfer = src->rfer - level_size; |
| 2791 | dst->rfer_cmpr = src->rfer_cmpr - level_size; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2792 | } |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2793 | for (i = 0; i < inherit->num_excl_copies; ++i, i_qgroups += 2) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2794 | struct btrfs_qgroup *src; |
| 2795 | struct btrfs_qgroup *dst; |
| 2796 | |
Mark Fasheh | 918c2ee | 2016-03-30 17:57:48 -0700 | [diff] [blame] | 2797 | if (!i_qgroups[0] || !i_qgroups[1]) |
| 2798 | continue; |
| 2799 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2800 | src = find_qgroup_rb(fs_info, i_qgroups[0]); |
| 2801 | dst = find_qgroup_rb(fs_info, i_qgroups[1]); |
| 2802 | |
| 2803 | if (!src || !dst) { |
| 2804 | ret = -EINVAL; |
| 2805 | goto unlock; |
| 2806 | } |
| 2807 | |
| 2808 | dst->excl = src->excl + level_size; |
| 2809 | dst->excl_cmpr = src->excl_cmpr + level_size; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2810 | } |
| 2811 | |
| 2812 | unlock: |
| 2813 | spin_unlock(&fs_info->qgroup_lock); |
| 2814 | out: |
Qu Wenruo | e88439d | 2019-06-13 17:31:24 +0800 | [diff] [blame] | 2815 | if (!committing) |
| 2816 | mutex_unlock(&fs_info->qgroup_ioctl_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2817 | return ret; |
| 2818 | } |
| 2819 | |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2820 | /* |
| 2821 | * Two limits to commit transaction in advance. |
| 2822 | * |
Qu Wenruo | f5fef45 | 2019-01-25 07:55:27 +0800 | [diff] [blame] | 2823 | * For RATIO, it will be 1/RATIO of the remaining limit as threshold. |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2824 | * For SIZE, it will be in byte unit as threshold. |
| 2825 | */ |
Qu Wenruo | f5fef45 | 2019-01-25 07:55:27 +0800 | [diff] [blame] | 2826 | #define QGROUP_FREE_RATIO 32 |
| 2827 | #define QGROUP_FREE_SIZE SZ_32M |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2828 | static bool qgroup_check_limits(struct btrfs_fs_info *fs_info, |
| 2829 | const struct btrfs_qgroup *qg, u64 num_bytes) |
Jeff Mahoney | 003d7c5 | 2017-01-25 09:50:33 -0500 | [diff] [blame] | 2830 | { |
Qu Wenruo | f5fef45 | 2019-01-25 07:55:27 +0800 | [diff] [blame] | 2831 | u64 free; |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2832 | u64 threshold; |
| 2833 | |
Jeff Mahoney | 003d7c5 | 2017-01-25 09:50:33 -0500 | [diff] [blame] | 2834 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) && |
Qu Wenruo | dba2132 | 2017-12-12 15:34:25 +0800 | [diff] [blame] | 2835 | qgroup_rsv_total(qg) + (s64)qg->rfer + num_bytes > qg->max_rfer) |
Jeff Mahoney | 003d7c5 | 2017-01-25 09:50:33 -0500 | [diff] [blame] | 2836 | return false; |
| 2837 | |
| 2838 | if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) && |
Qu Wenruo | dba2132 | 2017-12-12 15:34:25 +0800 | [diff] [blame] | 2839 | qgroup_rsv_total(qg) + (s64)qg->excl + num_bytes > qg->max_excl) |
Jeff Mahoney | 003d7c5 | 2017-01-25 09:50:33 -0500 | [diff] [blame] | 2840 | return false; |
| 2841 | |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2842 | /* |
| 2843 | * Even if we passed the check, it's better to check if reservation |
| 2844 | * for meta_pertrans is pushing us near limit. |
| 2845 | * If there is too much pertrans reservation or it's near the limit, |
| 2846 | * let's try commit transaction to free some, using transaction_kthread |
| 2847 | */ |
| 2848 | if ((qg->lim_flags & (BTRFS_QGROUP_LIMIT_MAX_RFER | |
| 2849 | BTRFS_QGROUP_LIMIT_MAX_EXCL))) { |
Qu Wenruo | f5fef45 | 2019-01-25 07:55:27 +0800 | [diff] [blame] | 2850 | if (qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) { |
| 2851 | free = qg->max_excl - qgroup_rsv_total(qg) - qg->excl; |
| 2852 | threshold = min_t(u64, qg->max_excl / QGROUP_FREE_RATIO, |
| 2853 | QGROUP_FREE_SIZE); |
| 2854 | } else { |
| 2855 | free = qg->max_rfer - qgroup_rsv_total(qg) - qg->rfer; |
| 2856 | threshold = min_t(u64, qg->max_rfer / QGROUP_FREE_RATIO, |
| 2857 | QGROUP_FREE_SIZE); |
| 2858 | } |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2859 | |
| 2860 | /* |
| 2861 | * Use transaction_kthread to commit transaction, so we no |
| 2862 | * longer need to bother nested transaction nor lock context. |
| 2863 | */ |
Qu Wenruo | f5fef45 | 2019-01-25 07:55:27 +0800 | [diff] [blame] | 2864 | if (free < threshold) |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2865 | btrfs_commit_transaction_locksafe(fs_info); |
| 2866 | } |
| 2867 | |
Jeff Mahoney | 003d7c5 | 2017-01-25 09:50:33 -0500 | [diff] [blame] | 2868 | return true; |
| 2869 | } |
| 2870 | |
Qu Wenruo | dba2132 | 2017-12-12 15:34:25 +0800 | [diff] [blame] | 2871 | static int qgroup_reserve(struct btrfs_root *root, u64 num_bytes, bool enforce, |
| 2872 | enum btrfs_qgroup_rsv_type type) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2873 | { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2874 | struct btrfs_qgroup *qgroup; |
| 2875 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 2876 | u64 ref_root = root->root_key.objectid; |
| 2877 | int ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2878 | struct ulist_node *unode; |
| 2879 | struct ulist_iterator uiter; |
| 2880 | |
| 2881 | if (!is_fstree(ref_root)) |
| 2882 | return 0; |
| 2883 | |
| 2884 | if (num_bytes == 0) |
| 2885 | return 0; |
Sargun Dhillon | f29efe2 | 2017-05-11 21:17:33 +0000 | [diff] [blame] | 2886 | |
| 2887 | if (test_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags) && |
| 2888 | capable(CAP_SYS_RESOURCE)) |
| 2889 | enforce = false; |
| 2890 | |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2891 | spin_lock(&fs_info->qgroup_lock); |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 2892 | if (!fs_info->quota_root) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2893 | goto out; |
| 2894 | |
| 2895 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 2896 | if (!qgroup) |
| 2897 | goto out; |
| 2898 | |
| 2899 | /* |
| 2900 | * in a first step, we check all affected qgroups if any limits would |
| 2901 | * be exceeded |
| 2902 | */ |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2903 | ulist_reinit(fs_info->qgroup_ulist); |
| 2904 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
David Sterba | a1840b5 | 2018-03-27 19:04:50 +0200 | [diff] [blame] | 2905 | qgroup_to_aux(qgroup), GFP_ATOMIC); |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 2906 | if (ret < 0) |
| 2907 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2908 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2909 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2910 | struct btrfs_qgroup *qg; |
| 2911 | struct btrfs_qgroup_list *glist; |
| 2912 | |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2913 | qg = unode_aux_to_qgroup(unode); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2914 | |
Qu Wenruo | a514d63 | 2017-12-22 16:06:39 +0800 | [diff] [blame] | 2915 | if (enforce && !qgroup_check_limits(fs_info, qg, num_bytes)) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2916 | ret = -EDQUOT; |
Wang Shilong | 720f1e2 | 2013-03-06 11:51:47 +0000 | [diff] [blame] | 2917 | goto out; |
| 2918 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2919 | |
| 2920 | list_for_each_entry(glist, &qg->groups, next_group) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2921 | ret = ulist_add(fs_info->qgroup_ulist, |
| 2922 | glist->group->qgroupid, |
David Sterba | a1840b5 | 2018-03-27 19:04:50 +0200 | [diff] [blame] | 2923 | qgroup_to_aux(glist->group), GFP_ATOMIC); |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 2924 | if (ret < 0) |
| 2925 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2926 | } |
| 2927 | } |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 2928 | ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2929 | /* |
| 2930 | * no limits exceeded, now record the reservation into all qgroups |
| 2931 | */ |
| 2932 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2933 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2934 | struct btrfs_qgroup *qg; |
| 2935 | |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 2936 | qg = unode_aux_to_qgroup(unode); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2937 | |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 2938 | qgroup_rsv_add(fs_info, qg, num_bytes, type); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2939 | } |
| 2940 | |
| 2941 | out: |
| 2942 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2943 | return ret; |
| 2944 | } |
| 2945 | |
Qu Wenruo | e1211d0 | 2017-12-12 15:34:30 +0800 | [diff] [blame] | 2946 | /* |
| 2947 | * Free @num_bytes of reserved space with @type for qgroup. (Normally level 0 |
| 2948 | * qgroup). |
| 2949 | * |
| 2950 | * Will handle all higher level qgroup too. |
| 2951 | * |
| 2952 | * NOTE: If @num_bytes is (u64)-1, this means to free all bytes of this qgroup. |
| 2953 | * This special case is only used for META_PERTRANS type. |
| 2954 | */ |
Qu Wenruo | 297d750 | 2015-09-08 17:08:37 +0800 | [diff] [blame] | 2955 | void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info, |
Qu Wenruo | d4e5c92 | 2017-12-12 15:34:23 +0800 | [diff] [blame] | 2956 | u64 ref_root, u64 num_bytes, |
| 2957 | enum btrfs_qgroup_rsv_type type) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2958 | { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2959 | struct btrfs_qgroup *qgroup; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2960 | struct ulist_node *unode; |
| 2961 | struct ulist_iterator uiter; |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 2962 | int ret = 0; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2963 | |
| 2964 | if (!is_fstree(ref_root)) |
| 2965 | return; |
| 2966 | |
| 2967 | if (num_bytes == 0) |
| 2968 | return; |
| 2969 | |
Qu Wenruo | e1211d0 | 2017-12-12 15:34:30 +0800 | [diff] [blame] | 2970 | if (num_bytes == (u64)-1 && type != BTRFS_QGROUP_RSV_META_PERTRANS) { |
| 2971 | WARN(1, "%s: Invalid type to free", __func__); |
| 2972 | return; |
| 2973 | } |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2974 | spin_lock(&fs_info->qgroup_lock); |
| 2975 | |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 2976 | if (!fs_info->quota_root) |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2977 | goto out; |
| 2978 | |
| 2979 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 2980 | if (!qgroup) |
| 2981 | goto out; |
| 2982 | |
Qu Wenruo | e1211d0 | 2017-12-12 15:34:30 +0800 | [diff] [blame] | 2983 | if (num_bytes == (u64)-1) |
Qu Wenruo | 8287475 | 2017-12-12 15:34:34 +0800 | [diff] [blame] | 2984 | /* |
| 2985 | * We're freeing all pertrans rsv, get reserved value from |
| 2986 | * level 0 qgroup as real num_bytes to free. |
| 2987 | */ |
Qu Wenruo | e1211d0 | 2017-12-12 15:34:30 +0800 | [diff] [blame] | 2988 | num_bytes = qgroup->rsv.values[type]; |
| 2989 | |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2990 | ulist_reinit(fs_info->qgroup_ulist); |
| 2991 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
David Sterba | a1840b5 | 2018-03-27 19:04:50 +0200 | [diff] [blame] | 2992 | qgroup_to_aux(qgroup), GFP_ATOMIC); |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 2993 | if (ret < 0) |
| 2994 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2995 | ULIST_ITER_INIT(&uiter); |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 2996 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 2997 | struct btrfs_qgroup *qg; |
| 2998 | struct btrfs_qgroup_list *glist; |
| 2999 | |
David Sterba | ef2fff6 | 2016-10-26 16:23:50 +0200 | [diff] [blame] | 3000 | qg = unode_aux_to_qgroup(unode); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 3001 | |
Qu Wenruo | 64ee4e7 | 2017-12-12 15:34:27 +0800 | [diff] [blame] | 3002 | qgroup_rsv_release(fs_info, qg, num_bytes, type); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 3003 | |
| 3004 | list_for_each_entry(glist, &qg->groups, next_group) { |
Wang Shilong | 1e8f915 | 2013-05-06 11:03:27 +0000 | [diff] [blame] | 3005 | ret = ulist_add(fs_info->qgroup_ulist, |
| 3006 | glist->group->qgroupid, |
David Sterba | a1840b5 | 2018-03-27 19:04:50 +0200 | [diff] [blame] | 3007 | qgroup_to_aux(glist->group), GFP_ATOMIC); |
Wang Shilong | 3c97185 | 2013-04-17 14:00:36 +0000 | [diff] [blame] | 3008 | if (ret < 0) |
| 3009 | goto out; |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 3010 | } |
| 3011 | } |
| 3012 | |
| 3013 | out: |
| 3014 | spin_unlock(&fs_info->qgroup_lock); |
Arne Jansen | bed92ea | 2012-06-28 18:03:02 +0200 | [diff] [blame] | 3015 | } |
| 3016 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3017 | /* |
Qu Wenruo | ff3d27a0 | 2018-05-14 09:38:13 +0800 | [diff] [blame] | 3018 | * Check if the leaf is the last leaf. Which means all node pointers |
| 3019 | * are at their last position. |
| 3020 | */ |
| 3021 | static bool is_last_leaf(struct btrfs_path *path) |
| 3022 | { |
| 3023 | int i; |
| 3024 | |
| 3025 | for (i = 1; i < BTRFS_MAX_LEVEL && path->nodes[i]; i++) { |
| 3026 | if (path->slots[i] != btrfs_header_nritems(path->nodes[i]) - 1) |
| 3027 | return false; |
| 3028 | } |
| 3029 | return true; |
| 3030 | } |
| 3031 | |
| 3032 | /* |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3033 | * returns < 0 on error, 0 when more leafs are to be scanned. |
Qu Wenruo | 3393168 | 2015-02-27 16:24:24 +0800 | [diff] [blame] | 3034 | * returns 1 when done. |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3035 | */ |
Lu Fengqi | 62088ca | 2018-07-18 14:45:42 +0800 | [diff] [blame] | 3036 | static int qgroup_rescan_leaf(struct btrfs_trans_handle *trans, |
| 3037 | struct btrfs_path *path) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3038 | { |
Lu Fengqi | 62088ca | 2018-07-18 14:45:42 +0800 | [diff] [blame] | 3039 | struct btrfs_fs_info *fs_info = trans->fs_info; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3040 | struct btrfs_key found; |
Qu Wenruo | 0a0e8b89 | 2015-10-26 09:19:43 +0800 | [diff] [blame] | 3041 | struct extent_buffer *scratch_leaf = NULL; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3042 | struct ulist *roots = NULL; |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 3043 | u64 num_bytes; |
Qu Wenruo | ff3d27a0 | 2018-05-14 09:38:13 +0800 | [diff] [blame] | 3044 | bool done; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3045 | int slot; |
| 3046 | int ret; |
| 3047 | |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3048 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 3049 | ret = btrfs_search_slot_for_read(fs_info->extent_root, |
| 3050 | &fs_info->qgroup_rescan_progress, |
| 3051 | path, 1, 0); |
| 3052 | |
Jeff Mahoney | ab8d0fc | 2016-09-20 10:05:02 -0400 | [diff] [blame] | 3053 | btrfs_debug(fs_info, |
| 3054 | "current progress key (%llu %u %llu), search_slot ret %d", |
| 3055 | fs_info->qgroup_rescan_progress.objectid, |
| 3056 | fs_info->qgroup_rescan_progress.type, |
| 3057 | fs_info->qgroup_rescan_progress.offset, ret); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3058 | |
| 3059 | if (ret) { |
| 3060 | /* |
| 3061 | * The rescan is about to end, we will not be scanning any |
| 3062 | * further blocks. We cannot unset the RESCAN flag here, because |
| 3063 | * we want to commit the transaction if everything went well. |
| 3064 | * To make the live accounting work in this phase, we set our |
| 3065 | * scan progress pointer such that every real extent objectid |
| 3066 | * will be smaller. |
| 3067 | */ |
| 3068 | fs_info->qgroup_rescan_progress.objectid = (u64)-1; |
| 3069 | btrfs_release_path(path); |
| 3070 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3071 | return ret; |
| 3072 | } |
Qu Wenruo | ff3d27a0 | 2018-05-14 09:38:13 +0800 | [diff] [blame] | 3073 | done = is_last_leaf(path); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3074 | |
| 3075 | btrfs_item_key_to_cpu(path->nodes[0], &found, |
| 3076 | btrfs_header_nritems(path->nodes[0]) - 1); |
| 3077 | fs_info->qgroup_rescan_progress.objectid = found.objectid + 1; |
| 3078 | |
Qu Wenruo | 0a0e8b89 | 2015-10-26 09:19:43 +0800 | [diff] [blame] | 3079 | scratch_leaf = btrfs_clone_extent_buffer(path->nodes[0]); |
| 3080 | if (!scratch_leaf) { |
| 3081 | ret = -ENOMEM; |
| 3082 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3083 | goto out; |
| 3084 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3085 | slot = path->slots[0]; |
| 3086 | btrfs_release_path(path); |
| 3087 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3088 | |
| 3089 | for (; slot < btrfs_header_nritems(scratch_leaf); ++slot) { |
| 3090 | btrfs_item_key_to_cpu(scratch_leaf, &found, slot); |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame] | 3091 | if (found.type != BTRFS_EXTENT_ITEM_KEY && |
| 3092 | found.type != BTRFS_METADATA_ITEM_KEY) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3093 | continue; |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame] | 3094 | if (found.type == BTRFS_METADATA_ITEM_KEY) |
Jeff Mahoney | da17066 | 2016-06-15 09:22:56 -0400 | [diff] [blame] | 3095 | num_bytes = fs_info->nodesize; |
Josef Bacik | 3a6d75e | 2014-01-23 16:45:10 -0500 | [diff] [blame] | 3096 | else |
| 3097 | num_bytes = found.offset; |
| 3098 | |
Josef Bacik | fcebe45 | 2014-05-13 17:30:47 -0700 | [diff] [blame] | 3099 | ret = btrfs_find_all_roots(NULL, fs_info, found.objectid, 0, |
Zygo Blaxell | c995ab3 | 2017-09-22 13:58:45 -0400 | [diff] [blame] | 3100 | &roots, false); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3101 | if (ret < 0) |
| 3102 | goto out; |
Qu Wenruo | 9d220c9 | 2015-04-13 11:02:16 +0800 | [diff] [blame] | 3103 | /* For rescan, just pass old_roots as NULL */ |
Lu Fengqi | 8696d76 | 2018-07-18 14:45:39 +0800 | [diff] [blame] | 3104 | ret = btrfs_qgroup_account_extent(trans, found.objectid, |
| 3105 | num_bytes, NULL, roots); |
Qu Wenruo | 9d220c9 | 2015-04-13 11:02:16 +0800 | [diff] [blame] | 3106 | if (ret < 0) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3107 | goto out; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3108 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3109 | out: |
Nikolay Borisov | df44971 | 2018-08-15 18:26:56 +0300 | [diff] [blame] | 3110 | if (scratch_leaf) |
Qu Wenruo | 0a0e8b89 | 2015-10-26 09:19:43 +0800 | [diff] [blame] | 3111 | free_extent_buffer(scratch_leaf); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3112 | |
Qu Wenruo | 6f7de19 | 2018-06-27 18:19:55 +0800 | [diff] [blame] | 3113 | if (done && !ret) { |
Qu Wenruo | ff3d27a0 | 2018-05-14 09:38:13 +0800 | [diff] [blame] | 3114 | ret = 1; |
Qu Wenruo | 6f7de19 | 2018-06-27 18:19:55 +0800 | [diff] [blame] | 3115 | fs_info->qgroup_rescan_progress.objectid = (u64)-1; |
| 3116 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3117 | return ret; |
| 3118 | } |
| 3119 | |
Qu Wenruo | d458b05 | 2014-02-28 10:46:19 +0800 | [diff] [blame] | 3120 | static void btrfs_qgroup_rescan_worker(struct btrfs_work *work) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3121 | { |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3122 | struct btrfs_fs_info *fs_info = container_of(work, struct btrfs_fs_info, |
| 3123 | qgroup_rescan_work); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3124 | struct btrfs_path *path; |
| 3125 | struct btrfs_trans_handle *trans = NULL; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3126 | int err = -ENOMEM; |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3127 | int ret = 0; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3128 | |
| 3129 | path = btrfs_alloc_path(); |
| 3130 | if (!path) |
| 3131 | goto out; |
Qu Wenruo | b6debf1 | 2018-05-14 09:38:12 +0800 | [diff] [blame] | 3132 | /* |
| 3133 | * Rescan should only search for commit root, and any later difference |
| 3134 | * should be recorded by qgroup |
| 3135 | */ |
| 3136 | path->search_commit_root = 1; |
| 3137 | path->skip_locking = 1; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3138 | |
| 3139 | err = 0; |
Justin Maggard | 7343dd6 | 2015-11-04 15:56:16 -0800 | [diff] [blame] | 3140 | while (!err && !btrfs_fs_closing(fs_info)) { |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3141 | trans = btrfs_start_transaction(fs_info->fs_root, 0); |
| 3142 | if (IS_ERR(trans)) { |
| 3143 | err = PTR_ERR(trans); |
| 3144 | break; |
| 3145 | } |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 3146 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) { |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3147 | err = -EINTR; |
| 3148 | } else { |
Lu Fengqi | 62088ca | 2018-07-18 14:45:42 +0800 | [diff] [blame] | 3149 | err = qgroup_rescan_leaf(trans, path); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3150 | } |
| 3151 | if (err > 0) |
Jeff Mahoney | 3a45bb2 | 2016-09-09 21:39:03 -0400 | [diff] [blame] | 3152 | btrfs_commit_transaction(trans); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3153 | else |
Jeff Mahoney | 3a45bb2 | 2016-09-09 21:39:03 -0400 | [diff] [blame] | 3154 | btrfs_end_transaction(trans); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3155 | } |
| 3156 | |
| 3157 | out: |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3158 | btrfs_free_path(path); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3159 | |
| 3160 | mutex_lock(&fs_info->qgroup_rescan_lock); |
Qu Wenruo | 3393168 | 2015-02-27 16:24:24 +0800 | [diff] [blame] | 3161 | if (err > 0 && |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3162 | fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT) { |
| 3163 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 3164 | } else if (err < 0) { |
| 3165 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 3166 | } |
| 3167 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3168 | |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3169 | /* |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 3170 | * only update status, since the previous part has already updated the |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3171 | * qgroup info. |
| 3172 | */ |
| 3173 | trans = btrfs_start_transaction(fs_info->quota_root, 1); |
| 3174 | if (IS_ERR(trans)) { |
| 3175 | err = PTR_ERR(trans); |
Filipe Manana | 13fc1d2 | 2019-09-24 10:49:54 +0100 | [diff] [blame] | 3176 | trans = NULL; |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3177 | btrfs_err(fs_info, |
David Sterba | 913e153 | 2017-07-13 15:32:18 +0200 | [diff] [blame] | 3178 | "fail to start transaction for status update: %d", |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3179 | err); |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3180 | } |
Filipe Manana | 13fc1d2 | 2019-09-24 10:49:54 +0100 | [diff] [blame] | 3181 | |
| 3182 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 3183 | if (!btrfs_fs_closing(fs_info)) |
| 3184 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 3185 | if (trans) { |
| 3186 | ret = update_qgroup_status_item(trans); |
| 3187 | if (ret < 0) { |
| 3188 | err = ret; |
| 3189 | btrfs_err(fs_info, "fail to update qgroup status: %d", |
| 3190 | err); |
| 3191 | } |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3192 | } |
Filipe Manana | 13fc1d2 | 2019-09-24 10:49:54 +0100 | [diff] [blame] | 3193 | fs_info->qgroup_rescan_running = false; |
| 3194 | complete_all(&fs_info->qgroup_rescan_completion); |
| 3195 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3196 | |
| 3197 | if (!trans) |
| 3198 | return; |
| 3199 | |
Jeff Mahoney | 3a45bb2 | 2016-09-09 21:39:03 -0400 | [diff] [blame] | 3200 | btrfs_end_transaction(trans); |
Qu Wenruo | 53b7cde | 2015-02-27 16:24:25 +0800 | [diff] [blame] | 3201 | |
Justin Maggard | 7343dd6 | 2015-11-04 15:56:16 -0800 | [diff] [blame] | 3202 | if (btrfs_fs_closing(fs_info)) { |
| 3203 | btrfs_info(fs_info, "qgroup scan paused"); |
| 3204 | } else if (err >= 0) { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3205 | btrfs_info(fs_info, "qgroup scan completed%s", |
Qu Wenruo | 3393168 | 2015-02-27 16:24:24 +0800 | [diff] [blame] | 3206 | err > 0 ? " (inconsistency flag cleared)" : ""); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3207 | } else { |
Frank Holton | efe120a | 2013-12-20 11:37:06 -0500 | [diff] [blame] | 3208 | btrfs_err(fs_info, "qgroup scan failed with %d", err); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3209 | } |
| 3210 | } |
| 3211 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3212 | /* |
| 3213 | * Checks that (a) no rescan is running and (b) quota is enabled. Allocates all |
| 3214 | * memory required for the rescan context. |
| 3215 | */ |
| 3216 | static int |
| 3217 | qgroup_rescan_init(struct btrfs_fs_info *fs_info, u64 progress_objectid, |
| 3218 | int init_flags) |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3219 | { |
| 3220 | int ret = 0; |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3221 | |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3222 | if (!init_flags) { |
| 3223 | /* we're resuming qgroup rescan at mount time */ |
Filipe Manana | e4e7ede | 2018-06-27 00:43:15 +0100 | [diff] [blame] | 3224 | if (!(fs_info->qgroup_flags & |
| 3225 | BTRFS_QGROUP_STATUS_FLAG_RESCAN)) { |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3226 | btrfs_warn(fs_info, |
Nikolay Borisov | 37d0259 | 2019-11-18 14:16:44 +0200 | [diff] [blame] | 3227 | "qgroup rescan init failed, qgroup rescan is not queued"); |
Filipe Manana | e4e7ede | 2018-06-27 00:43:15 +0100 | [diff] [blame] | 3228 | ret = -EINVAL; |
| 3229 | } else if (!(fs_info->qgroup_flags & |
| 3230 | BTRFS_QGROUP_STATUS_FLAG_ON)) { |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3231 | btrfs_warn(fs_info, |
Nikolay Borisov | 37d0259 | 2019-11-18 14:16:44 +0200 | [diff] [blame] | 3232 | "qgroup rescan init failed, qgroup is not enabled"); |
Filipe Manana | e4e7ede | 2018-06-27 00:43:15 +0100 | [diff] [blame] | 3233 | ret = -EINVAL; |
| 3234 | } |
| 3235 | |
| 3236 | if (ret) |
| 3237 | return ret; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3238 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3239 | |
| 3240 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 3241 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3242 | |
| 3243 | if (init_flags) { |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3244 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { |
| 3245 | btrfs_warn(fs_info, |
| 3246 | "qgroup rescan is already in progress"); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3247 | ret = -EINPROGRESS; |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3248 | } else if (!(fs_info->qgroup_flags & |
| 3249 | BTRFS_QGROUP_STATUS_FLAG_ON)) { |
| 3250 | btrfs_warn(fs_info, |
| 3251 | "qgroup rescan init failed, qgroup is not enabled"); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3252 | ret = -EINVAL; |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3253 | } |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3254 | |
| 3255 | if (ret) { |
| 3256 | spin_unlock(&fs_info->qgroup_lock); |
| 3257 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
Qu Wenruo | 9593bf49 | 2018-05-02 13:28:03 +0800 | [diff] [blame] | 3258 | return ret; |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3259 | } |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3260 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 3261 | } |
| 3262 | |
| 3263 | memset(&fs_info->qgroup_rescan_progress, 0, |
| 3264 | sizeof(fs_info->qgroup_rescan_progress)); |
| 3265 | fs_info->qgroup_rescan_progress.objectid = progress_objectid; |
Filipe Manana | 190631f | 2015-11-05 10:06:23 +0000 | [diff] [blame] | 3266 | init_completion(&fs_info->qgroup_rescan_completion); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3267 | |
| 3268 | spin_unlock(&fs_info->qgroup_lock); |
| 3269 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3270 | |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 3271 | btrfs_init_work(&fs_info->qgroup_rescan_work, |
| 3272 | btrfs_qgroup_rescan_worker, NULL, NULL); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3273 | return 0; |
| 3274 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3275 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3276 | static void |
| 3277 | qgroup_rescan_zero_tracking(struct btrfs_fs_info *fs_info) |
| 3278 | { |
| 3279 | struct rb_node *n; |
| 3280 | struct btrfs_qgroup *qgroup; |
| 3281 | |
| 3282 | spin_lock(&fs_info->qgroup_lock); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3283 | /* clear all current qgroup tracking information */ |
| 3284 | for (n = rb_first(&fs_info->qgroup_tree); n; n = rb_next(n)) { |
| 3285 | qgroup = rb_entry(n, struct btrfs_qgroup, node); |
| 3286 | qgroup->rfer = 0; |
| 3287 | qgroup->rfer_cmpr = 0; |
| 3288 | qgroup->excl = 0; |
| 3289 | qgroup->excl_cmpr = 0; |
Qu Wenruo | 9c7b0c2 | 2018-08-10 10:20:26 +0800 | [diff] [blame] | 3290 | qgroup_dirty(fs_info, qgroup); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3291 | } |
| 3292 | spin_unlock(&fs_info->qgroup_lock); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3293 | } |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3294 | |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3295 | int |
| 3296 | btrfs_qgroup_rescan(struct btrfs_fs_info *fs_info) |
| 3297 | { |
| 3298 | int ret = 0; |
| 3299 | struct btrfs_trans_handle *trans; |
| 3300 | |
| 3301 | ret = qgroup_rescan_init(fs_info, 0, 1); |
| 3302 | if (ret) |
| 3303 | return ret; |
| 3304 | |
| 3305 | /* |
| 3306 | * We have set the rescan_progress to 0, which means no more |
| 3307 | * delayed refs will be accounted by btrfs_qgroup_account_ref. |
| 3308 | * However, btrfs_qgroup_account_ref may be right after its call |
| 3309 | * to btrfs_find_all_roots, in which case it would still do the |
| 3310 | * accounting. |
| 3311 | * To solve this, we're committing the transaction, which will |
| 3312 | * ensure we run all delayed refs and only after that, we are |
| 3313 | * going to clear all tracking information for a clean start. |
| 3314 | */ |
| 3315 | |
| 3316 | trans = btrfs_join_transaction(fs_info->fs_root); |
| 3317 | if (IS_ERR(trans)) { |
| 3318 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 3319 | return PTR_ERR(trans); |
| 3320 | } |
Jeff Mahoney | 3a45bb2 | 2016-09-09 21:39:03 -0400 | [diff] [blame] | 3321 | ret = btrfs_commit_transaction(trans); |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3322 | if (ret) { |
| 3323 | fs_info->qgroup_flags &= ~BTRFS_QGROUP_STATUS_FLAG_RESCAN; |
| 3324 | return ret; |
| 3325 | } |
| 3326 | |
| 3327 | qgroup_rescan_zero_tracking(fs_info); |
| 3328 | |
Qu Wenruo | d61acbb | 2020-02-07 13:38:20 +0800 | [diff] [blame^] | 3329 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 3330 | fs_info->qgroup_rescan_running = true; |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 3331 | btrfs_queue_work(fs_info->qgroup_rescan_workers, |
| 3332 | &fs_info->qgroup_rescan_work); |
Qu Wenruo | d61acbb | 2020-02-07 13:38:20 +0800 | [diff] [blame^] | 3333 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
Jan Schmidt | 2f23203 | 2013-04-25 16:04:51 +0000 | [diff] [blame] | 3334 | |
| 3335 | return 0; |
| 3336 | } |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 3337 | |
Jeff Mahoney | d06f23d | 2016-08-08 22:08:06 -0400 | [diff] [blame] | 3338 | int btrfs_qgroup_wait_for_completion(struct btrfs_fs_info *fs_info, |
| 3339 | bool interruptible) |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 3340 | { |
| 3341 | int running; |
| 3342 | int ret = 0; |
| 3343 | |
| 3344 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 3345 | spin_lock(&fs_info->qgroup_lock); |
Jeff Mahoney | d2c609b | 2016-08-15 12:10:33 -0400 | [diff] [blame] | 3346 | running = fs_info->qgroup_rescan_running; |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 3347 | spin_unlock(&fs_info->qgroup_lock); |
| 3348 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3349 | |
Jeff Mahoney | d06f23d | 2016-08-08 22:08:06 -0400 | [diff] [blame] | 3350 | if (!running) |
| 3351 | return 0; |
| 3352 | |
| 3353 | if (interruptible) |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 3354 | ret = wait_for_completion_interruptible( |
| 3355 | &fs_info->qgroup_rescan_completion); |
Jeff Mahoney | d06f23d | 2016-08-08 22:08:06 -0400 | [diff] [blame] | 3356 | else |
| 3357 | wait_for_completion(&fs_info->qgroup_rescan_completion); |
Jan Schmidt | 57254b6e | 2013-05-06 19:14:17 +0000 | [diff] [blame] | 3358 | |
| 3359 | return ret; |
| 3360 | } |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3361 | |
| 3362 | /* |
| 3363 | * this is only called from open_ctree where we're still single threaded, thus |
| 3364 | * locking is omitted here. |
| 3365 | */ |
| 3366 | void |
| 3367 | btrfs_qgroup_rescan_resume(struct btrfs_fs_info *fs_info) |
| 3368 | { |
Qu Wenruo | d61acbb | 2020-02-07 13:38:20 +0800 | [diff] [blame^] | 3369 | if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { |
| 3370 | mutex_lock(&fs_info->qgroup_rescan_lock); |
| 3371 | fs_info->qgroup_rescan_running = true; |
Qu Wenruo | fc97fab | 2014-02-28 10:46:16 +0800 | [diff] [blame] | 3372 | btrfs_queue_work(fs_info->qgroup_rescan_workers, |
| 3373 | &fs_info->qgroup_rescan_work); |
Qu Wenruo | d61acbb | 2020-02-07 13:38:20 +0800 | [diff] [blame^] | 3374 | mutex_unlock(&fs_info->qgroup_rescan_lock); |
| 3375 | } |
Jan Schmidt | b382a32 | 2013-05-28 15:47:24 +0000 | [diff] [blame] | 3376 | } |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3377 | |
| 3378 | /* |
| 3379 | * Reserve qgroup space for range [start, start + len). |
| 3380 | * |
| 3381 | * This function will either reserve space from related qgroups or doing |
| 3382 | * nothing if the range is already reserved. |
| 3383 | * |
| 3384 | * Return 0 for successful reserve |
| 3385 | * Return <0 for error (including -EQUOT) |
| 3386 | * |
| 3387 | * NOTE: this function may sleep for memory allocation. |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3388 | * if btrfs_qgroup_reserve_data() is called multiple times with |
| 3389 | * same @reserved, caller must ensure when error happens it's OK |
| 3390 | * to free *ALL* reserved space. |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3391 | */ |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3392 | int btrfs_qgroup_reserve_data(struct inode *inode, |
| 3393 | struct extent_changeset **reserved_ret, u64 start, |
| 3394 | u64 len) |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3395 | { |
| 3396 | struct btrfs_root *root = BTRFS_I(inode)->root; |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3397 | struct ulist_node *unode; |
| 3398 | struct ulist_iterator uiter; |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3399 | struct extent_changeset *reserved; |
| 3400 | u64 orig_reserved; |
| 3401 | u64 to_reserve; |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3402 | int ret; |
| 3403 | |
Josef Bacik | afcdd12 | 2016-09-02 15:40:02 -0400 | [diff] [blame] | 3404 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &root->fs_info->flags) || |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3405 | !is_fstree(root->root_key.objectid) || len == 0) |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3406 | return 0; |
| 3407 | |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3408 | /* @reserved parameter is mandatory for qgroup */ |
| 3409 | if (WARN_ON(!reserved_ret)) |
| 3410 | return -EINVAL; |
| 3411 | if (!*reserved_ret) { |
| 3412 | *reserved_ret = extent_changeset_alloc(); |
| 3413 | if (!*reserved_ret) |
| 3414 | return -ENOMEM; |
| 3415 | } |
| 3416 | reserved = *reserved_ret; |
| 3417 | /* Record already reserved space */ |
| 3418 | orig_reserved = reserved->bytes_changed; |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3419 | ret = set_record_extent_bits(&BTRFS_I(inode)->io_tree, start, |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3420 | start + len -1, EXTENT_QGROUP_RESERVED, reserved); |
| 3421 | |
| 3422 | /* Newly reserved space */ |
| 3423 | to_reserve = reserved->bytes_changed - orig_reserved; |
Qu Wenruo | 81fb6f7 | 2015-09-28 16:57:53 +0800 | [diff] [blame] | 3424 | trace_btrfs_qgroup_reserve_data(inode, start, len, |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3425 | to_reserve, QGROUP_RESERVE); |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3426 | if (ret < 0) |
| 3427 | goto cleanup; |
Qu Wenruo | dba2132 | 2017-12-12 15:34:25 +0800 | [diff] [blame] | 3428 | ret = qgroup_reserve(root, to_reserve, true, BTRFS_QGROUP_RSV_DATA); |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3429 | if (ret < 0) |
| 3430 | goto cleanup; |
| 3431 | |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3432 | return ret; |
| 3433 | |
| 3434 | cleanup: |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3435 | /* cleanup *ALL* already reserved ranges */ |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3436 | ULIST_ITER_INIT(&uiter); |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3437 | while ((unode = ulist_next(&reserved->range_changed, &uiter))) |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3438 | clear_extent_bit(&BTRFS_I(inode)->io_tree, unode->val, |
David Sterba | ae0f162 | 2017-10-31 16:37:52 +0100 | [diff] [blame] | 3439 | unode->aux, EXTENT_QGROUP_RESERVED, 0, 0, NULL); |
Qu Wenruo | d4e2049 | 2019-09-16 20:02:39 +0800 | [diff] [blame] | 3440 | /* Also free data bytes of already reserved one */ |
| 3441 | btrfs_qgroup_free_refroot(root->fs_info, root->root_key.objectid, |
| 3442 | orig_reserved, BTRFS_QGROUP_RSV_DATA); |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3443 | extent_changeset_release(reserved); |
Qu Wenruo | 5247255 | 2015-10-12 16:05:40 +0800 | [diff] [blame] | 3444 | return ret; |
| 3445 | } |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3446 | |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3447 | /* Free ranges specified by @reserved, normally in error path */ |
| 3448 | static int qgroup_free_reserved_data(struct inode *inode, |
| 3449 | struct extent_changeset *reserved, u64 start, u64 len) |
| 3450 | { |
| 3451 | struct btrfs_root *root = BTRFS_I(inode)->root; |
| 3452 | struct ulist_node *unode; |
| 3453 | struct ulist_iterator uiter; |
| 3454 | struct extent_changeset changeset; |
| 3455 | int freed = 0; |
| 3456 | int ret; |
| 3457 | |
| 3458 | extent_changeset_init(&changeset); |
| 3459 | len = round_up(start + len, root->fs_info->sectorsize); |
| 3460 | start = round_down(start, root->fs_info->sectorsize); |
| 3461 | |
| 3462 | ULIST_ITER_INIT(&uiter); |
| 3463 | while ((unode = ulist_next(&reserved->range_changed, &uiter))) { |
| 3464 | u64 range_start = unode->val; |
| 3465 | /* unode->aux is the inclusive end */ |
| 3466 | u64 range_len = unode->aux - range_start + 1; |
| 3467 | u64 free_start; |
| 3468 | u64 free_len; |
| 3469 | |
| 3470 | extent_changeset_release(&changeset); |
| 3471 | |
| 3472 | /* Only free range in range [start, start + len) */ |
| 3473 | if (range_start >= start + len || |
| 3474 | range_start + range_len <= start) |
| 3475 | continue; |
| 3476 | free_start = max(range_start, start); |
| 3477 | free_len = min(start + len, range_start + range_len) - |
| 3478 | free_start; |
| 3479 | /* |
| 3480 | * TODO: To also modify reserved->ranges_reserved to reflect |
| 3481 | * the modification. |
| 3482 | * |
| 3483 | * However as long as we free qgroup reserved according to |
| 3484 | * EXTENT_QGROUP_RESERVED, we won't double free. |
| 3485 | * So not need to rush. |
| 3486 | */ |
Qu Wenruo | bab32fc | 2019-09-16 20:02:38 +0800 | [diff] [blame] | 3487 | ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3488 | free_start, free_start + free_len - 1, |
| 3489 | EXTENT_QGROUP_RESERVED, &changeset); |
| 3490 | if (ret < 0) |
| 3491 | goto out; |
| 3492 | freed += changeset.bytes_changed; |
| 3493 | } |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3494 | btrfs_qgroup_free_refroot(root->fs_info, root->root_key.objectid, freed, |
Qu Wenruo | d4e5c92 | 2017-12-12 15:34:23 +0800 | [diff] [blame] | 3495 | BTRFS_QGROUP_RSV_DATA); |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3496 | ret = freed; |
| 3497 | out: |
| 3498 | extent_changeset_release(&changeset); |
| 3499 | return ret; |
| 3500 | } |
| 3501 | |
| 3502 | static int __btrfs_qgroup_release_data(struct inode *inode, |
| 3503 | struct extent_changeset *reserved, u64 start, u64 len, |
| 3504 | int free) |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3505 | { |
| 3506 | struct extent_changeset changeset; |
Qu Wenruo | 81fb6f7 | 2015-09-28 16:57:53 +0800 | [diff] [blame] | 3507 | int trace_op = QGROUP_RELEASE; |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3508 | int ret; |
| 3509 | |
Qu Wenruo | 3628b4c | 2018-10-09 14:36:45 +0800 | [diff] [blame] | 3510 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, |
| 3511 | &BTRFS_I(inode)->root->fs_info->flags)) |
| 3512 | return 0; |
| 3513 | |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3514 | /* In release case, we shouldn't have @reserved */ |
| 3515 | WARN_ON(!free && reserved); |
| 3516 | if (free && reserved) |
| 3517 | return qgroup_free_reserved_data(inode, reserved, start, len); |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3518 | extent_changeset_init(&changeset); |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3519 | ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, start, |
David Sterba | f734c44 | 2016-04-26 23:54:39 +0200 | [diff] [blame] | 3520 | start + len -1, EXTENT_QGROUP_RESERVED, &changeset); |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3521 | if (ret < 0) |
| 3522 | goto out; |
| 3523 | |
Qu Wenruo | d51ea5d | 2017-03-13 15:52:09 +0800 | [diff] [blame] | 3524 | if (free) |
| 3525 | trace_op = QGROUP_FREE; |
| 3526 | trace_btrfs_qgroup_release_data(inode, start, len, |
| 3527 | changeset.bytes_changed, trace_op); |
| 3528 | if (free) |
David Sterba | 0b08e1f | 2017-02-13 14:24:35 +0100 | [diff] [blame] | 3529 | btrfs_qgroup_free_refroot(BTRFS_I(inode)->root->fs_info, |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3530 | BTRFS_I(inode)->root->root_key.objectid, |
Qu Wenruo | d4e5c92 | 2017-12-12 15:34:23 +0800 | [diff] [blame] | 3531 | changeset.bytes_changed, BTRFS_QGROUP_RSV_DATA); |
Qu Wenruo | 7bc329c | 2017-02-27 15:10:36 +0800 | [diff] [blame] | 3532 | ret = changeset.bytes_changed; |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3533 | out: |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3534 | extent_changeset_release(&changeset); |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3535 | return ret; |
| 3536 | } |
| 3537 | |
| 3538 | /* |
| 3539 | * Free a reserved space range from io_tree and related qgroups |
| 3540 | * |
| 3541 | * Should be called when a range of pages get invalidated before reaching disk. |
| 3542 | * Or for error cleanup case. |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3543 | * if @reserved is given, only reserved range in [@start, @start + @len) will |
| 3544 | * be freed. |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3545 | * |
| 3546 | * For data written to disk, use btrfs_qgroup_release_data(). |
| 3547 | * |
| 3548 | * NOTE: This function may sleep for memory allocation. |
| 3549 | */ |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3550 | int btrfs_qgroup_free_data(struct inode *inode, |
| 3551 | struct extent_changeset *reserved, u64 start, u64 len) |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3552 | { |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3553 | return __btrfs_qgroup_release_data(inode, reserved, start, len, 1); |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3554 | } |
| 3555 | |
| 3556 | /* |
| 3557 | * Release a reserved space range from io_tree only. |
| 3558 | * |
| 3559 | * Should be called when a range of pages get written to disk and corresponding |
| 3560 | * FILE_EXTENT is inserted into corresponding root. |
| 3561 | * |
| 3562 | * Since new qgroup accounting framework will only update qgroup numbers at |
| 3563 | * commit_transaction() time, its reserved space shouldn't be freed from |
| 3564 | * related qgroups. |
| 3565 | * |
| 3566 | * But we should release the range from io_tree, to allow further write to be |
| 3567 | * COWed. |
| 3568 | * |
| 3569 | * NOTE: This function may sleep for memory allocation. |
| 3570 | */ |
| 3571 | int btrfs_qgroup_release_data(struct inode *inode, u64 start, u64 len) |
| 3572 | { |
Qu Wenruo | bc42bda | 2017-02-27 15:10:39 +0800 | [diff] [blame] | 3573 | return __btrfs_qgroup_release_data(inode, NULL, start, len, 0); |
Qu Wenruo | f695fdc | 2015-10-12 16:28:06 +0800 | [diff] [blame] | 3574 | } |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3575 | |
Qu Wenruo | 8287475 | 2017-12-12 15:34:34 +0800 | [diff] [blame] | 3576 | static void add_root_meta_rsv(struct btrfs_root *root, int num_bytes, |
| 3577 | enum btrfs_qgroup_rsv_type type) |
| 3578 | { |
| 3579 | if (type != BTRFS_QGROUP_RSV_META_PREALLOC && |
| 3580 | type != BTRFS_QGROUP_RSV_META_PERTRANS) |
| 3581 | return; |
| 3582 | if (num_bytes == 0) |
| 3583 | return; |
| 3584 | |
| 3585 | spin_lock(&root->qgroup_meta_rsv_lock); |
| 3586 | if (type == BTRFS_QGROUP_RSV_META_PREALLOC) |
| 3587 | root->qgroup_meta_rsv_prealloc += num_bytes; |
| 3588 | else |
| 3589 | root->qgroup_meta_rsv_pertrans += num_bytes; |
| 3590 | spin_unlock(&root->qgroup_meta_rsv_lock); |
| 3591 | } |
| 3592 | |
| 3593 | static int sub_root_meta_rsv(struct btrfs_root *root, int num_bytes, |
| 3594 | enum btrfs_qgroup_rsv_type type) |
| 3595 | { |
| 3596 | if (type != BTRFS_QGROUP_RSV_META_PREALLOC && |
| 3597 | type != BTRFS_QGROUP_RSV_META_PERTRANS) |
| 3598 | return 0; |
| 3599 | if (num_bytes == 0) |
| 3600 | return 0; |
| 3601 | |
| 3602 | spin_lock(&root->qgroup_meta_rsv_lock); |
| 3603 | if (type == BTRFS_QGROUP_RSV_META_PREALLOC) { |
| 3604 | num_bytes = min_t(u64, root->qgroup_meta_rsv_prealloc, |
| 3605 | num_bytes); |
| 3606 | root->qgroup_meta_rsv_prealloc -= num_bytes; |
| 3607 | } else { |
| 3608 | num_bytes = min_t(u64, root->qgroup_meta_rsv_pertrans, |
| 3609 | num_bytes); |
| 3610 | root->qgroup_meta_rsv_pertrans -= num_bytes; |
| 3611 | } |
| 3612 | spin_unlock(&root->qgroup_meta_rsv_lock); |
| 3613 | return num_bytes; |
| 3614 | } |
| 3615 | |
Qu Wenruo | 733e03a | 2017-12-12 15:34:29 +0800 | [diff] [blame] | 3616 | int __btrfs_qgroup_reserve_meta(struct btrfs_root *root, int num_bytes, |
| 3617 | enum btrfs_qgroup_rsv_type type, bool enforce) |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3618 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3619 | struct btrfs_fs_info *fs_info = root->fs_info; |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3620 | int ret; |
| 3621 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3622 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) || |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3623 | !is_fstree(root->root_key.objectid) || num_bytes == 0) |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3624 | return 0; |
| 3625 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3626 | BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize)); |
Qu Wenruo | fd2b007 | 2019-10-17 10:38:36 +0800 | [diff] [blame] | 3627 | trace_qgroup_meta_reserve(root, (s64)num_bytes, type); |
Qu Wenruo | 733e03a | 2017-12-12 15:34:29 +0800 | [diff] [blame] | 3628 | ret = qgroup_reserve(root, num_bytes, enforce, type); |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3629 | if (ret < 0) |
| 3630 | return ret; |
Qu Wenruo | 8287475 | 2017-12-12 15:34:34 +0800 | [diff] [blame] | 3631 | /* |
| 3632 | * Record what we have reserved into root. |
| 3633 | * |
| 3634 | * To avoid quota disabled->enabled underflow. |
| 3635 | * In that case, we may try to free space we haven't reserved |
| 3636 | * (since quota was disabled), so record what we reserved into root. |
| 3637 | * And ensure later release won't underflow this number. |
| 3638 | */ |
| 3639 | add_root_meta_rsv(root, num_bytes, type); |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3640 | return ret; |
| 3641 | } |
| 3642 | |
Qu Wenruo | 733e03a | 2017-12-12 15:34:29 +0800 | [diff] [blame] | 3643 | void btrfs_qgroup_free_meta_all_pertrans(struct btrfs_root *root) |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3644 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3645 | struct btrfs_fs_info *fs_info = root->fs_info; |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3646 | |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3647 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) || |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3648 | !is_fstree(root->root_key.objectid)) |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3649 | return; |
| 3650 | |
Qu Wenruo | e1211d0 | 2017-12-12 15:34:30 +0800 | [diff] [blame] | 3651 | /* TODO: Update trace point to handle such free */ |
Qu Wenruo | 4ee0d88 | 2017-12-12 15:34:35 +0800 | [diff] [blame] | 3652 | trace_qgroup_meta_free_all_pertrans(root); |
Qu Wenruo | e1211d0 | 2017-12-12 15:34:30 +0800 | [diff] [blame] | 3653 | /* Special value -1 means to free all reserved space */ |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3654 | btrfs_qgroup_free_refroot(fs_info, root->root_key.objectid, (u64)-1, |
Qu Wenruo | 733e03a | 2017-12-12 15:34:29 +0800 | [diff] [blame] | 3655 | BTRFS_QGROUP_RSV_META_PERTRANS); |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3656 | } |
| 3657 | |
Qu Wenruo | 733e03a | 2017-12-12 15:34:29 +0800 | [diff] [blame] | 3658 | void __btrfs_qgroup_free_meta(struct btrfs_root *root, int num_bytes, |
| 3659 | enum btrfs_qgroup_rsv_type type) |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3660 | { |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3661 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 3662 | |
| 3663 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) || |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3664 | !is_fstree(root->root_key.objectid)) |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3665 | return; |
| 3666 | |
Qu Wenruo | 8287475 | 2017-12-12 15:34:34 +0800 | [diff] [blame] | 3667 | /* |
| 3668 | * reservation for META_PREALLOC can happen before quota is enabled, |
| 3669 | * which can lead to underflow. |
| 3670 | * Here ensure we will only free what we really have reserved. |
| 3671 | */ |
| 3672 | num_bytes = sub_root_meta_rsv(root, num_bytes, type); |
Jeff Mahoney | 0b246af | 2016-06-22 18:54:23 -0400 | [diff] [blame] | 3673 | BUG_ON(num_bytes != round_down(num_bytes, fs_info->nodesize)); |
Qu Wenruo | fd2b007 | 2019-10-17 10:38:36 +0800 | [diff] [blame] | 3674 | trace_qgroup_meta_reserve(root, -(s64)num_bytes, type); |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3675 | btrfs_qgroup_free_refroot(fs_info, root->root_key.objectid, |
| 3676 | num_bytes, type); |
Qu Wenruo | 55eeaf0 | 2015-09-08 17:08:38 +0800 | [diff] [blame] | 3677 | } |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3678 | |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3679 | static void qgroup_convert_meta(struct btrfs_fs_info *fs_info, u64 ref_root, |
| 3680 | int num_bytes) |
| 3681 | { |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3682 | struct btrfs_qgroup *qgroup; |
| 3683 | struct ulist_node *unode; |
| 3684 | struct ulist_iterator uiter; |
| 3685 | int ret = 0; |
| 3686 | |
| 3687 | if (num_bytes == 0) |
| 3688 | return; |
Marcos Paulo de Souza | e3b0edd | 2019-11-25 21:58:50 -0300 | [diff] [blame] | 3689 | if (!fs_info->quota_root) |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3690 | return; |
| 3691 | |
| 3692 | spin_lock(&fs_info->qgroup_lock); |
| 3693 | qgroup = find_qgroup_rb(fs_info, ref_root); |
| 3694 | if (!qgroup) |
| 3695 | goto out; |
| 3696 | ulist_reinit(fs_info->qgroup_ulist); |
| 3697 | ret = ulist_add(fs_info->qgroup_ulist, qgroup->qgroupid, |
David Sterba | a1840b5 | 2018-03-27 19:04:50 +0200 | [diff] [blame] | 3698 | qgroup_to_aux(qgroup), GFP_ATOMIC); |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3699 | if (ret < 0) |
| 3700 | goto out; |
| 3701 | ULIST_ITER_INIT(&uiter); |
| 3702 | while ((unode = ulist_next(fs_info->qgroup_ulist, &uiter))) { |
| 3703 | struct btrfs_qgroup *qg; |
| 3704 | struct btrfs_qgroup_list *glist; |
| 3705 | |
| 3706 | qg = unode_aux_to_qgroup(unode); |
| 3707 | |
| 3708 | qgroup_rsv_release(fs_info, qg, num_bytes, |
| 3709 | BTRFS_QGROUP_RSV_META_PREALLOC); |
| 3710 | qgroup_rsv_add(fs_info, qg, num_bytes, |
| 3711 | BTRFS_QGROUP_RSV_META_PERTRANS); |
| 3712 | list_for_each_entry(glist, &qg->groups, next_group) { |
| 3713 | ret = ulist_add(fs_info->qgroup_ulist, |
| 3714 | glist->group->qgroupid, |
David Sterba | a1840b5 | 2018-03-27 19:04:50 +0200 | [diff] [blame] | 3715 | qgroup_to_aux(glist->group), GFP_ATOMIC); |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3716 | if (ret < 0) |
| 3717 | goto out; |
| 3718 | } |
| 3719 | } |
| 3720 | out: |
| 3721 | spin_unlock(&fs_info->qgroup_lock); |
| 3722 | } |
| 3723 | |
| 3724 | void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes) |
| 3725 | { |
| 3726 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 3727 | |
| 3728 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) || |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3729 | !is_fstree(root->root_key.objectid)) |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3730 | return; |
Qu Wenruo | 8287475 | 2017-12-12 15:34:34 +0800 | [diff] [blame] | 3731 | /* Same as btrfs_qgroup_free_meta_prealloc() */ |
| 3732 | num_bytes = sub_root_meta_rsv(root, num_bytes, |
| 3733 | BTRFS_QGROUP_RSV_META_PREALLOC); |
Qu Wenruo | 4ee0d88 | 2017-12-12 15:34:35 +0800 | [diff] [blame] | 3734 | trace_qgroup_meta_convert(root, num_bytes); |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3735 | qgroup_convert_meta(fs_info, root->root_key.objectid, num_bytes); |
Qu Wenruo | 64cfaef | 2017-12-12 15:34:31 +0800 | [diff] [blame] | 3736 | } |
| 3737 | |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3738 | /* |
Nicholas D Steeves | 0132761 | 2016-05-19 21:18:45 -0400 | [diff] [blame] | 3739 | * Check qgroup reserved space leaking, normally at destroy inode |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3740 | * time |
| 3741 | */ |
| 3742 | void btrfs_qgroup_check_reserved_leak(struct inode *inode) |
| 3743 | { |
| 3744 | struct extent_changeset changeset; |
| 3745 | struct ulist_node *unode; |
| 3746 | struct ulist_iterator iter; |
| 3747 | int ret; |
| 3748 | |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3749 | extent_changeset_init(&changeset); |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3750 | ret = clear_record_extent_bits(&BTRFS_I(inode)->io_tree, 0, (u64)-1, |
David Sterba | f734c44 | 2016-04-26 23:54:39 +0200 | [diff] [blame] | 3751 | EXTENT_QGROUP_RESERVED, &changeset); |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3752 | |
| 3753 | WARN_ON(ret < 0); |
| 3754 | if (WARN_ON(changeset.bytes_changed)) { |
| 3755 | ULIST_ITER_INIT(&iter); |
David Sterba | 53d3235 | 2017-02-13 13:42:29 +0100 | [diff] [blame] | 3756 | while ((unode = ulist_next(&changeset.range_changed, &iter))) { |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3757 | btrfs_warn(BTRFS_I(inode)->root->fs_info, |
| 3758 | "leaking qgroup reserved space, ino: %lu, start: %llu, end: %llu", |
| 3759 | inode->i_ino, unode->val, unode->aux); |
| 3760 | } |
David Sterba | 0b08e1f | 2017-02-13 14:24:35 +0100 | [diff] [blame] | 3761 | btrfs_qgroup_free_refroot(BTRFS_I(inode)->root->fs_info, |
Misono Tomohiro | 4fd786e | 2018-08-06 14:25:24 +0900 | [diff] [blame] | 3762 | BTRFS_I(inode)->root->root_key.objectid, |
Qu Wenruo | d4e5c92 | 2017-12-12 15:34:23 +0800 | [diff] [blame] | 3763 | changeset.bytes_changed, BTRFS_QGROUP_RSV_DATA); |
David Sterba | 0b08e1f | 2017-02-13 14:24:35 +0100 | [diff] [blame] | 3764 | |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3765 | } |
Qu Wenruo | 364ecf3 | 2017-02-27 15:10:38 +0800 | [diff] [blame] | 3766 | extent_changeset_release(&changeset); |
Qu Wenruo | 56fa9d0 | 2015-10-13 09:53:10 +0800 | [diff] [blame] | 3767 | } |
Qu Wenruo | 370a11b | 2019-01-23 15:15:16 +0800 | [diff] [blame] | 3768 | |
| 3769 | void btrfs_qgroup_init_swapped_blocks( |
| 3770 | struct btrfs_qgroup_swapped_blocks *swapped_blocks) |
| 3771 | { |
| 3772 | int i; |
| 3773 | |
| 3774 | spin_lock_init(&swapped_blocks->lock); |
| 3775 | for (i = 0; i < BTRFS_MAX_LEVEL; i++) |
| 3776 | swapped_blocks->blocks[i] = RB_ROOT; |
| 3777 | swapped_blocks->swapped = false; |
| 3778 | } |
| 3779 | |
| 3780 | /* |
| 3781 | * Delete all swapped blocks record of @root. |
| 3782 | * Every record here means we skipped a full subtree scan for qgroup. |
| 3783 | * |
| 3784 | * Gets called when committing one transaction. |
| 3785 | */ |
| 3786 | void btrfs_qgroup_clean_swapped_blocks(struct btrfs_root *root) |
| 3787 | { |
| 3788 | struct btrfs_qgroup_swapped_blocks *swapped_blocks; |
| 3789 | int i; |
| 3790 | |
| 3791 | swapped_blocks = &root->swapped_blocks; |
| 3792 | |
| 3793 | spin_lock(&swapped_blocks->lock); |
| 3794 | if (!swapped_blocks->swapped) |
| 3795 | goto out; |
| 3796 | for (i = 0; i < BTRFS_MAX_LEVEL; i++) { |
| 3797 | struct rb_root *cur_root = &swapped_blocks->blocks[i]; |
| 3798 | struct btrfs_qgroup_swapped_block *entry; |
| 3799 | struct btrfs_qgroup_swapped_block *next; |
| 3800 | |
| 3801 | rbtree_postorder_for_each_entry_safe(entry, next, cur_root, |
| 3802 | node) |
| 3803 | kfree(entry); |
| 3804 | swapped_blocks->blocks[i] = RB_ROOT; |
| 3805 | } |
| 3806 | swapped_blocks->swapped = false; |
| 3807 | out: |
| 3808 | spin_unlock(&swapped_blocks->lock); |
| 3809 | } |
| 3810 | |
| 3811 | /* |
| 3812 | * Add subtree roots record into @subvol_root. |
| 3813 | * |
| 3814 | * @subvol_root: tree root of the subvolume tree get swapped |
| 3815 | * @bg: block group under balance |
| 3816 | * @subvol_parent/slot: pointer to the subtree root in subvolume tree |
| 3817 | * @reloc_parent/slot: pointer to the subtree root in reloc tree |
| 3818 | * BOTH POINTERS ARE BEFORE TREE SWAP |
| 3819 | * @last_snapshot: last snapshot generation of the subvolume tree |
| 3820 | */ |
| 3821 | int btrfs_qgroup_add_swapped_blocks(struct btrfs_trans_handle *trans, |
| 3822 | struct btrfs_root *subvol_root, |
David Sterba | 32da5386 | 2019-10-29 19:20:18 +0100 | [diff] [blame] | 3823 | struct btrfs_block_group *bg, |
Qu Wenruo | 370a11b | 2019-01-23 15:15:16 +0800 | [diff] [blame] | 3824 | struct extent_buffer *subvol_parent, int subvol_slot, |
| 3825 | struct extent_buffer *reloc_parent, int reloc_slot, |
| 3826 | u64 last_snapshot) |
| 3827 | { |
| 3828 | struct btrfs_fs_info *fs_info = subvol_root->fs_info; |
| 3829 | struct btrfs_qgroup_swapped_blocks *blocks = &subvol_root->swapped_blocks; |
| 3830 | struct btrfs_qgroup_swapped_block *block; |
| 3831 | struct rb_node **cur; |
| 3832 | struct rb_node *parent = NULL; |
| 3833 | int level = btrfs_header_level(subvol_parent) - 1; |
| 3834 | int ret = 0; |
| 3835 | |
| 3836 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
| 3837 | return 0; |
| 3838 | |
| 3839 | if (btrfs_node_ptr_generation(subvol_parent, subvol_slot) > |
| 3840 | btrfs_node_ptr_generation(reloc_parent, reloc_slot)) { |
| 3841 | btrfs_err_rl(fs_info, |
| 3842 | "%s: bad parameter order, subvol_gen=%llu reloc_gen=%llu", |
| 3843 | __func__, |
| 3844 | btrfs_node_ptr_generation(subvol_parent, subvol_slot), |
| 3845 | btrfs_node_ptr_generation(reloc_parent, reloc_slot)); |
| 3846 | return -EUCLEAN; |
| 3847 | } |
| 3848 | |
| 3849 | block = kmalloc(sizeof(*block), GFP_NOFS); |
| 3850 | if (!block) { |
| 3851 | ret = -ENOMEM; |
| 3852 | goto out; |
| 3853 | } |
| 3854 | |
| 3855 | /* |
| 3856 | * @reloc_parent/slot is still before swap, while @block is going to |
| 3857 | * record the bytenr after swap, so we do the swap here. |
| 3858 | */ |
| 3859 | block->subvol_bytenr = btrfs_node_blockptr(reloc_parent, reloc_slot); |
| 3860 | block->subvol_generation = btrfs_node_ptr_generation(reloc_parent, |
| 3861 | reloc_slot); |
| 3862 | block->reloc_bytenr = btrfs_node_blockptr(subvol_parent, subvol_slot); |
| 3863 | block->reloc_generation = btrfs_node_ptr_generation(subvol_parent, |
| 3864 | subvol_slot); |
| 3865 | block->last_snapshot = last_snapshot; |
| 3866 | block->level = level; |
Qu Wenruo | 57949d0 | 2019-05-21 19:28:08 +0800 | [diff] [blame] | 3867 | |
| 3868 | /* |
| 3869 | * If we have bg == NULL, we're called from btrfs_recover_relocation(), |
| 3870 | * no one else can modify tree blocks thus we qgroup will not change |
| 3871 | * no matter the value of trace_leaf. |
| 3872 | */ |
| 3873 | if (bg && bg->flags & BTRFS_BLOCK_GROUP_DATA) |
Qu Wenruo | 370a11b | 2019-01-23 15:15:16 +0800 | [diff] [blame] | 3874 | block->trace_leaf = true; |
| 3875 | else |
| 3876 | block->trace_leaf = false; |
| 3877 | btrfs_node_key_to_cpu(reloc_parent, &block->first_key, reloc_slot); |
| 3878 | |
| 3879 | /* Insert @block into @blocks */ |
| 3880 | spin_lock(&blocks->lock); |
| 3881 | cur = &blocks->blocks[level].rb_node; |
| 3882 | while (*cur) { |
| 3883 | struct btrfs_qgroup_swapped_block *entry; |
| 3884 | |
| 3885 | parent = *cur; |
| 3886 | entry = rb_entry(parent, struct btrfs_qgroup_swapped_block, |
| 3887 | node); |
| 3888 | |
| 3889 | if (entry->subvol_bytenr < block->subvol_bytenr) { |
| 3890 | cur = &(*cur)->rb_left; |
| 3891 | } else if (entry->subvol_bytenr > block->subvol_bytenr) { |
| 3892 | cur = &(*cur)->rb_right; |
| 3893 | } else { |
| 3894 | if (entry->subvol_generation != |
| 3895 | block->subvol_generation || |
| 3896 | entry->reloc_bytenr != block->reloc_bytenr || |
| 3897 | entry->reloc_generation != |
| 3898 | block->reloc_generation) { |
| 3899 | /* |
| 3900 | * Duplicated but mismatch entry found. |
| 3901 | * Shouldn't happen. |
| 3902 | * |
| 3903 | * Marking qgroup inconsistent should be enough |
| 3904 | * for end users. |
| 3905 | */ |
| 3906 | WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG)); |
| 3907 | ret = -EEXIST; |
| 3908 | } |
| 3909 | kfree(block); |
| 3910 | goto out_unlock; |
| 3911 | } |
| 3912 | } |
| 3913 | rb_link_node(&block->node, parent, cur); |
| 3914 | rb_insert_color(&block->node, &blocks->blocks[level]); |
| 3915 | blocks->swapped = true; |
| 3916 | out_unlock: |
| 3917 | spin_unlock(&blocks->lock); |
| 3918 | out: |
| 3919 | if (ret < 0) |
| 3920 | fs_info->qgroup_flags |= |
| 3921 | BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 3922 | return ret; |
| 3923 | } |
Qu Wenruo | f616f5c | 2019-01-23 15:15:17 +0800 | [diff] [blame] | 3924 | |
| 3925 | /* |
| 3926 | * Check if the tree block is a subtree root, and if so do the needed |
| 3927 | * delayed subtree trace for qgroup. |
| 3928 | * |
| 3929 | * This is called during btrfs_cow_block(). |
| 3930 | */ |
| 3931 | int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans, |
| 3932 | struct btrfs_root *root, |
| 3933 | struct extent_buffer *subvol_eb) |
| 3934 | { |
| 3935 | struct btrfs_fs_info *fs_info = root->fs_info; |
| 3936 | struct btrfs_qgroup_swapped_blocks *blocks = &root->swapped_blocks; |
| 3937 | struct btrfs_qgroup_swapped_block *block; |
| 3938 | struct extent_buffer *reloc_eb = NULL; |
| 3939 | struct rb_node *node; |
| 3940 | bool found = false; |
| 3941 | bool swapped = false; |
| 3942 | int level = btrfs_header_level(subvol_eb); |
| 3943 | int ret = 0; |
| 3944 | int i; |
| 3945 | |
| 3946 | if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)) |
| 3947 | return 0; |
| 3948 | if (!is_fstree(root->root_key.objectid) || !root->reloc_root) |
| 3949 | return 0; |
| 3950 | |
| 3951 | spin_lock(&blocks->lock); |
| 3952 | if (!blocks->swapped) { |
| 3953 | spin_unlock(&blocks->lock); |
| 3954 | return 0; |
| 3955 | } |
| 3956 | node = blocks->blocks[level].rb_node; |
| 3957 | |
| 3958 | while (node) { |
| 3959 | block = rb_entry(node, struct btrfs_qgroup_swapped_block, node); |
| 3960 | if (block->subvol_bytenr < subvol_eb->start) { |
| 3961 | node = node->rb_left; |
| 3962 | } else if (block->subvol_bytenr > subvol_eb->start) { |
| 3963 | node = node->rb_right; |
| 3964 | } else { |
| 3965 | found = true; |
| 3966 | break; |
| 3967 | } |
| 3968 | } |
| 3969 | if (!found) { |
| 3970 | spin_unlock(&blocks->lock); |
| 3971 | goto out; |
| 3972 | } |
| 3973 | /* Found one, remove it from @blocks first and update blocks->swapped */ |
| 3974 | rb_erase(&block->node, &blocks->blocks[level]); |
| 3975 | for (i = 0; i < BTRFS_MAX_LEVEL; i++) { |
| 3976 | if (RB_EMPTY_ROOT(&blocks->blocks[i])) { |
| 3977 | swapped = true; |
| 3978 | break; |
| 3979 | } |
| 3980 | } |
| 3981 | blocks->swapped = swapped; |
| 3982 | spin_unlock(&blocks->lock); |
| 3983 | |
| 3984 | /* Read out reloc subtree root */ |
| 3985 | reloc_eb = read_tree_block(fs_info, block->reloc_bytenr, |
| 3986 | block->reloc_generation, block->level, |
| 3987 | &block->first_key); |
| 3988 | if (IS_ERR(reloc_eb)) { |
| 3989 | ret = PTR_ERR(reloc_eb); |
| 3990 | reloc_eb = NULL; |
| 3991 | goto free_out; |
| 3992 | } |
| 3993 | if (!extent_buffer_uptodate(reloc_eb)) { |
| 3994 | ret = -EIO; |
| 3995 | goto free_out; |
| 3996 | } |
| 3997 | |
| 3998 | ret = qgroup_trace_subtree_swap(trans, reloc_eb, subvol_eb, |
| 3999 | block->last_snapshot, block->trace_leaf); |
| 4000 | free_out: |
| 4001 | kfree(block); |
| 4002 | free_extent_buffer(reloc_eb); |
| 4003 | out: |
| 4004 | if (ret < 0) { |
| 4005 | btrfs_err_rl(fs_info, |
| 4006 | "failed to account subtree at bytenr %llu: %d", |
| 4007 | subvol_eb->start, ret); |
| 4008 | fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT; |
| 4009 | } |
| 4010 | return ret; |
| 4011 | } |
Jeff Mahoney | 81f7eb0 | 2020-02-11 15:25:37 +0800 | [diff] [blame] | 4012 | |
| 4013 | void btrfs_qgroup_destroy_extent_records(struct btrfs_transaction *trans) |
| 4014 | { |
| 4015 | struct btrfs_qgroup_extent_record *entry; |
| 4016 | struct btrfs_qgroup_extent_record *next; |
| 4017 | struct rb_root *root; |
| 4018 | |
| 4019 | root = &trans->delayed_refs.dirty_extent_root; |
| 4020 | rbtree_postorder_for_each_entry_safe(entry, next, root, node) { |
| 4021 | ulist_free(entry->old_roots); |
| 4022 | kfree(entry); |
| 4023 | } |
| 4024 | } |