| 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef __BTRFS_VOLUMES_ |
| 20 | #define __BTRFS_VOLUMES_ |
| 21 | |
| 22 | #include <linux/bio.h> |
| 23 | #include <linux/sort.h> |
| 24 | #include <linux/btrfs.h> |
| 25 | #include "async-thread.h" |
| 26 | |
| 27 | extern struct mutex uuid_mutex; |
| 28 | |
| 29 | #define BTRFS_STRIPE_LEN SZ_64K |
| 30 | |
| 31 | struct buffer_head; |
| 32 | struct btrfs_pending_bios { |
| 33 | struct bio *head; |
| 34 | struct bio *tail; |
| 35 | }; |
| 36 | |
| 37 | /* |
| 38 | * Use sequence counter to get consistent device stat data on |
| 39 | * 32-bit processors. |
| 40 | */ |
| 41 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) |
| 42 | #include <linux/seqlock.h> |
| 43 | #define __BTRFS_NEED_DEVICE_DATA_ORDERED |
| 44 | #define btrfs_device_data_ordered_init(device) \ |
| 45 | seqcount_init(&device->data_seqcount) |
| 46 | #else |
| 47 | #define btrfs_device_data_ordered_init(device) do { } while (0) |
| 48 | #endif |
| 49 | |
| 50 | struct btrfs_device { |
| 51 | struct list_head dev_list; |
| 52 | struct list_head dev_alloc_list; |
| 53 | struct btrfs_fs_devices *fs_devices; |
| 54 | |
| 55 | struct btrfs_root *dev_root; |
| 56 | |
| 57 | struct rcu_string *name; |
| 58 | |
| 59 | u64 generation; |
| 60 | |
| 61 | spinlock_t io_lock ____cacheline_aligned; |
| 62 | int running_pending; |
| 63 | /* regular prio bios */ |
| 64 | struct btrfs_pending_bios pending_bios; |
| 65 | /* WRITE_SYNC bios */ |
| 66 | struct btrfs_pending_bios pending_sync_bios; |
| 67 | |
| 68 | struct block_device *bdev; |
| 69 | |
| 70 | /* the mode sent to blkdev_get */ |
| 71 | fmode_t mode; |
| 72 | |
| 73 | int writeable; |
| 74 | int in_fs_metadata; |
| 75 | int missing; |
| 76 | int can_discard; |
| 77 | int is_tgtdev_for_dev_replace; |
| 78 | |
| 79 | #ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED |
| 80 | seqcount_t data_seqcount; |
| 81 | #endif |
| 82 | |
| 83 | /* the internal btrfs device id */ |
| 84 | u64 devid; |
| 85 | |
| 86 | /* size of the device in memory */ |
| 87 | u64 total_bytes; |
| 88 | |
| 89 | /* size of the device on disk */ |
| 90 | u64 disk_total_bytes; |
| 91 | |
| 92 | /* bytes used */ |
| 93 | u64 bytes_used; |
| 94 | |
| 95 | /* optimal io alignment for this device */ |
| 96 | u32 io_align; |
| 97 | |
| 98 | /* optimal io width for this device */ |
| 99 | u32 io_width; |
| 100 | /* type and info about this device */ |
| 101 | u64 type; |
| 102 | |
| 103 | /* minimal io size for this device */ |
| 104 | u32 sector_size; |
| 105 | |
| 106 | /* physical drive uuid (or lvm uuid) */ |
| 107 | u8 uuid[BTRFS_UUID_SIZE]; |
| 108 | |
| 109 | /* |
| 110 | * size of the device on the current transaction |
| 111 | * |
| 112 | * This variant is update when committing the transaction, |
| 113 | * and protected by device_list_mutex |
| 114 | */ |
| 115 | u64 commit_total_bytes; |
| 116 | |
| 117 | /* bytes used on the current transaction */ |
| 118 | u64 commit_bytes_used; |
| 119 | /* |
| 120 | * used to manage the device which is resized |
| 121 | * |
| 122 | * It is protected by chunk_lock. |
| 123 | */ |
| 124 | struct list_head resized_list; |
| 125 | |
| 126 | /* for sending down flush barriers */ |
| 127 | int nobarriers; |
| 128 | struct bio *flush_bio; |
| 129 | struct completion flush_wait; |
| 130 | |
| 131 | /* per-device scrub information */ |
| 132 | struct scrub_ctx *scrub_device; |
| 133 | |
| 134 | struct btrfs_work work; |
| 135 | struct rcu_head rcu; |
| 136 | struct work_struct rcu_work; |
| 137 | |
| 138 | /* readahead state */ |
| 139 | spinlock_t reada_lock; |
| 140 | atomic_t reada_in_flight; |
| 141 | u64 reada_next; |
| 142 | struct reada_zone *reada_curr_zone; |
| 143 | struct radix_tree_root reada_zones; |
| 144 | struct radix_tree_root reada_extents; |
| 145 | |
| 146 | /* disk I/O failure stats. For detailed description refer to |
| 147 | * enum btrfs_dev_stat_values in ioctl.h */ |
| 148 | int dev_stats_valid; |
| 149 | |
| 150 | /* Counter to record the change of device stats */ |
| 151 | atomic_t dev_stats_ccnt; |
| 152 | atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX]; |
| 153 | }; |
| 154 | |
| 155 | /* |
| 156 | * If we read those variants at the context of their own lock, we needn't |
| 157 | * use the following helpers, reading them directly is safe. |
| 158 | */ |
| 159 | #if BITS_PER_LONG==32 && defined(CONFIG_SMP) |
| 160 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
| 161 | static inline u64 \ |
| 162 | btrfs_device_get_##name(const struct btrfs_device *dev) \ |
| 163 | { \ |
| 164 | u64 size; \ |
| 165 | unsigned int seq; \ |
| 166 | \ |
| 167 | do { \ |
| 168 | seq = read_seqcount_begin(&dev->data_seqcount); \ |
| 169 | size = dev->name; \ |
| 170 | } while (read_seqcount_retry(&dev->data_seqcount, seq)); \ |
| 171 | return size; \ |
| 172 | } \ |
| 173 | \ |
| 174 | static inline void \ |
| 175 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ |
| 176 | { \ |
| 177 | preempt_disable(); \ |
| 178 | write_seqcount_begin(&dev->data_seqcount); \ |
| 179 | dev->name = size; \ |
| 180 | write_seqcount_end(&dev->data_seqcount); \ |
| 181 | preempt_enable(); \ |
| 182 | } |
| 183 | #elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT) |
| 184 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
| 185 | static inline u64 \ |
| 186 | btrfs_device_get_##name(const struct btrfs_device *dev) \ |
| 187 | { \ |
| 188 | u64 size; \ |
| 189 | \ |
| 190 | preempt_disable(); \ |
| 191 | size = dev->name; \ |
| 192 | preempt_enable(); \ |
| 193 | return size; \ |
| 194 | } \ |
| 195 | \ |
| 196 | static inline void \ |
| 197 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ |
| 198 | { \ |
| 199 | preempt_disable(); \ |
| 200 | dev->name = size; \ |
| 201 | preempt_enable(); \ |
| 202 | } |
| 203 | #else |
| 204 | #define BTRFS_DEVICE_GETSET_FUNCS(name) \ |
| 205 | static inline u64 \ |
| 206 | btrfs_device_get_##name(const struct btrfs_device *dev) \ |
| 207 | { \ |
| 208 | return dev->name; \ |
| 209 | } \ |
| 210 | \ |
| 211 | static inline void \ |
| 212 | btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \ |
| 213 | { \ |
| 214 | dev->name = size; \ |
| 215 | } |
| 216 | #endif |
| 217 | |
| 218 | BTRFS_DEVICE_GETSET_FUNCS(total_bytes); |
| 219 | BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes); |
| 220 | BTRFS_DEVICE_GETSET_FUNCS(bytes_used); |
| 221 | |
| 222 | struct btrfs_fs_devices { |
| 223 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 224 | |
| 225 | u64 num_devices; |
| 226 | u64 open_devices; |
| 227 | u64 rw_devices; |
| 228 | u64 missing_devices; |
| 229 | u64 total_rw_bytes; |
| 230 | u64 total_devices; |
| 231 | struct block_device *latest_bdev; |
| 232 | |
| 233 | /* all of the devices in the FS, protected by a mutex |
| 234 | * so we can safely walk it to write out the supers without |
| 235 | * worrying about add/remove by the multi-device code. |
| 236 | * Scrubbing super can kick off supers writing by holding |
| 237 | * this mutex lock. |
| 238 | */ |
| 239 | struct mutex device_list_mutex; |
| 240 | struct list_head devices; |
| 241 | |
| 242 | struct list_head resized_devices; |
| 243 | /* devices not currently being allocated */ |
| 244 | struct list_head alloc_list; |
| 245 | struct list_head list; |
| 246 | |
| 247 | struct btrfs_fs_devices *seed; |
| 248 | int seeding; |
| 249 | |
| 250 | int opened; |
| 251 | |
| 252 | /* set when we find or add a device that doesn't have the |
| 253 | * nonrot flag set |
| 254 | */ |
| 255 | int rotating; |
| 256 | |
| 257 | struct btrfs_fs_info *fs_info; |
| 258 | /* sysfs kobjects */ |
| 259 | struct kobject fsid_kobj; |
| 260 | struct kobject *device_dir_kobj; |
| 261 | struct completion kobj_unregister; |
| 262 | }; |
| 263 | |
| 264 | #define BTRFS_BIO_INLINE_CSUM_SIZE 64 |
| 265 | |
| 266 | /* |
| 267 | * we need the mirror number and stripe index to be passed around |
| 268 | * the call chain while we are processing end_io (especially errors). |
| 269 | * Really, what we need is a btrfs_bio structure that has this info |
| 270 | * and is properly sized with its stripe array, but we're not there |
| 271 | * quite yet. We have our own btrfs bioset, and all of the bios |
| 272 | * we allocate are actually btrfs_io_bios. We'll cram as much of |
| 273 | * struct btrfs_bio as we can into this over time. |
| 274 | */ |
| 275 | typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err); |
| 276 | struct btrfs_io_bio { |
| 277 | unsigned int mirror_num; |
| 278 | unsigned int stripe_index; |
| 279 | u64 logical; |
| 280 | u8 *csum; |
| 281 | u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE]; |
| 282 | u8 *csum_allocated; |
| 283 | btrfs_io_bio_end_io_t *end_io; |
| 284 | struct bio bio; |
| 285 | }; |
| 286 | |
| 287 | static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio) |
| 288 | { |
| 289 | return container_of(bio, struct btrfs_io_bio, bio); |
| 290 | } |
| 291 | |
| 292 | struct btrfs_bio_stripe { |
| 293 | struct btrfs_device *dev; |
| 294 | u64 physical; |
| 295 | u64 length; /* only used for discard mappings */ |
| 296 | }; |
| 297 | |
| 298 | struct btrfs_bio; |
| 299 | typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err); |
| 300 | |
| 301 | struct btrfs_bio { |
| 302 | atomic_t refs; |
| 303 | atomic_t stripes_pending; |
| 304 | struct btrfs_fs_info *fs_info; |
| 305 | u64 map_type; /* get from map_lookup->type */ |
| 306 | bio_end_io_t *end_io; |
| 307 | struct bio *orig_bio; |
| 308 | unsigned long flags; |
| 309 | void *private; |
| 310 | atomic_t error; |
| 311 | int max_errors; |
| 312 | int num_stripes; |
| 313 | int mirror_num; |
| 314 | int num_tgtdevs; |
| 315 | int *tgtdev_map; |
| 316 | /* |
| 317 | * logical block numbers for the start of each stripe |
| 318 | * The last one or two are p/q. These are sorted, |
| 319 | * so raid_map[0] is the start of our full stripe |
| 320 | */ |
| 321 | u64 *raid_map; |
| 322 | struct btrfs_bio_stripe stripes[]; |
| 323 | }; |
| 324 | |
| 325 | struct btrfs_device_info { |
| 326 | struct btrfs_device *dev; |
| 327 | u64 dev_offset; |
| 328 | u64 max_avail; |
| 329 | u64 total_avail; |
| 330 | }; |
| 331 | |
| 332 | struct btrfs_raid_attr { |
| 333 | int sub_stripes; /* sub_stripes info for map */ |
| 334 | int dev_stripes; /* stripes per dev */ |
| 335 | int devs_max; /* max devs to use */ |
| 336 | int devs_min; /* min devs needed */ |
| 337 | int tolerated_failures; /* max tolerated fail devs */ |
| 338 | int devs_increment; /* ndevs has to be a multiple of this */ |
| 339 | int ncopies; /* how many copies to data has */ |
| 340 | }; |
| 341 | |
| 342 | extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES]; |
| 343 | extern const int btrfs_raid_mindev_error[BTRFS_NR_RAID_TYPES]; |
| 344 | extern const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES]; |
| 345 | |
| 346 | struct map_lookup { |
| 347 | u64 type; |
| 348 | int io_align; |
| 349 | int io_width; |
| 350 | u64 stripe_len; |
| 351 | int sector_size; |
| 352 | int num_stripes; |
| 353 | int sub_stripes; |
| 354 | struct btrfs_bio_stripe stripes[]; |
| 355 | }; |
| 356 | |
| 357 | #define map_lookup_size(n) (sizeof(struct map_lookup) + \ |
| 358 | (sizeof(struct btrfs_bio_stripe) * (n))) |
| 359 | |
| 360 | struct btrfs_balance_args; |
| 361 | struct btrfs_balance_progress; |
| 362 | struct btrfs_balance_control { |
| 363 | struct btrfs_fs_info *fs_info; |
| 364 | |
| 365 | struct btrfs_balance_args data; |
| 366 | struct btrfs_balance_args meta; |
| 367 | struct btrfs_balance_args sys; |
| 368 | |
| 369 | u64 flags; |
| 370 | |
| 371 | struct btrfs_balance_progress stat; |
| 372 | }; |
| 373 | |
| 374 | int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start, |
| 375 | u64 end, u64 *length); |
| 376 | void btrfs_get_bbio(struct btrfs_bio *bbio); |
| 377 | void btrfs_put_bbio(struct btrfs_bio *bbio); |
| 378 | int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw, |
| 379 | u64 logical, u64 *length, |
| 380 | struct btrfs_bio **bbio_ret, int mirror_num); |
| 381 | int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int rw, |
| 382 | u64 logical, u64 *length, |
| 383 | struct btrfs_bio **bbio_ret, int mirror_num, |
| 384 | int need_raid_map); |
| 385 | int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree, |
| 386 | u64 chunk_start, u64 physical, u64 devid, |
| 387 | u64 **logical, int *naddrs, int *stripe_len); |
| 388 | int btrfs_read_sys_array(struct btrfs_root *root); |
| 389 | int btrfs_read_chunk_tree(struct btrfs_root *root); |
| 390 | int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, |
| 391 | struct btrfs_root *extent_root, u64 type); |
| 392 | void btrfs_mapping_init(struct btrfs_mapping_tree *tree); |
| 393 | void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree); |
| 394 | int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio, |
| 395 | int mirror_num, int async_submit); |
| 396 | int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, |
| 397 | fmode_t flags, void *holder); |
| 398 | int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder, |
| 399 | struct btrfs_fs_devices **fs_devices_ret); |
| 400 | int btrfs_close_devices(struct btrfs_fs_devices *fs_devices); |
| 401 | void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step); |
| 402 | void btrfs_assign_next_active_device(struct btrfs_fs_info *fs_info, |
| 403 | struct btrfs_device *device, struct btrfs_device *this_dev); |
| 404 | int btrfs_find_device_missing_or_by_path(struct btrfs_root *root, |
| 405 | char *device_path, |
| 406 | struct btrfs_device **device); |
| 407 | int btrfs_find_device_by_devspec(struct btrfs_root *root, u64 devid, |
| 408 | char *devpath, |
| 409 | struct btrfs_device **device); |
| 410 | struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, |
| 411 | const u64 *devid, |
| 412 | const u8 *uuid); |
| 413 | int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid); |
| 414 | void btrfs_cleanup_fs_uuids(void); |
| 415 | int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); |
| 416 | int btrfs_grow_device(struct btrfs_trans_handle *trans, |
| 417 | struct btrfs_device *device, u64 new_size); |
| 418 | struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid, |
| 419 | u8 *uuid, u8 *fsid); |
| 420 | int btrfs_shrink_device(struct btrfs_device *device, u64 new_size); |
| 421 | int btrfs_init_new_device(struct btrfs_root *root, char *path); |
| 422 | int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path, |
| 423 | struct btrfs_device *srcdev, |
| 424 | struct btrfs_device **device_out); |
| 425 | int btrfs_balance(struct btrfs_balance_control *bctl, |
| 426 | struct btrfs_ioctl_balance_args *bargs); |
| 427 | int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info); |
| 428 | int btrfs_recover_balance(struct btrfs_fs_info *fs_info); |
| 429 | int btrfs_pause_balance(struct btrfs_fs_info *fs_info); |
| 430 | int btrfs_cancel_balance(struct btrfs_fs_info *fs_info); |
| 431 | int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info); |
| 432 | int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info); |
| 433 | int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset); |
| 434 | int find_free_dev_extent_start(struct btrfs_transaction *transaction, |
| 435 | struct btrfs_device *device, u64 num_bytes, |
| 436 | u64 search_start, u64 *start, u64 *max_avail); |
| 437 | int find_free_dev_extent(struct btrfs_trans_handle *trans, |
| 438 | struct btrfs_device *device, u64 num_bytes, |
| 439 | u64 *start, u64 *max_avail); |
| 440 | void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index); |
| 441 | int btrfs_get_dev_stats(struct btrfs_root *root, |
| 442 | struct btrfs_ioctl_get_dev_stats *stats); |
| 443 | void btrfs_init_devices_late(struct btrfs_fs_info *fs_info); |
| 444 | int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info); |
| 445 | int btrfs_run_dev_stats(struct btrfs_trans_handle *trans, |
| 446 | struct btrfs_fs_info *fs_info); |
| 447 | void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info, |
| 448 | struct btrfs_device *srcdev); |
| 449 | void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, |
| 450 | struct btrfs_device *srcdev); |
| 451 | void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, |
| 452 | struct btrfs_device *tgtdev); |
| 453 | void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info, |
| 454 | struct btrfs_device *tgtdev); |
| 455 | void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path); |
| 456 | int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree, |
| 457 | u64 logical, u64 len, int mirror_num); |
| 458 | unsigned long btrfs_full_stripe_len(struct btrfs_root *root, |
| 459 | struct btrfs_mapping_tree *map_tree, |
| 460 | u64 logical); |
| 461 | int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans, |
| 462 | struct btrfs_root *extent_root, |
| 463 | u64 chunk_offset, u64 chunk_size); |
| 464 | int btrfs_remove_chunk(struct btrfs_trans_handle *trans, |
| 465 | struct btrfs_root *root, u64 chunk_offset); |
| 466 | |
| 467 | static inline int btrfs_dev_stats_dirty(struct btrfs_device *dev) |
| 468 | { |
| 469 | return atomic_read(&dev->dev_stats_ccnt); |
| 470 | } |
| 471 | |
| 472 | static inline void btrfs_dev_stat_inc(struct btrfs_device *dev, |
| 473 | int index) |
| 474 | { |
| 475 | atomic_inc(dev->dev_stat_values + index); |
| 476 | smp_mb__before_atomic(); |
| 477 | atomic_inc(&dev->dev_stats_ccnt); |
| 478 | } |
| 479 | |
| 480 | static inline int btrfs_dev_stat_read(struct btrfs_device *dev, |
| 481 | int index) |
| 482 | { |
| 483 | return atomic_read(dev->dev_stat_values + index); |
| 484 | } |
| 485 | |
| 486 | static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev, |
| 487 | int index) |
| 488 | { |
| 489 | int ret; |
| 490 | |
| 491 | ret = atomic_xchg(dev->dev_stat_values + index, 0); |
| 492 | smp_mb__before_atomic(); |
| 493 | atomic_inc(&dev->dev_stats_ccnt); |
| 494 | return ret; |
| 495 | } |
| 496 | |
| 497 | static inline void btrfs_dev_stat_set(struct btrfs_device *dev, |
| 498 | int index, unsigned long val) |
| 499 | { |
| 500 | atomic_set(dev->dev_stat_values + index, val); |
| 501 | smp_mb__before_atomic(); |
| 502 | atomic_inc(&dev->dev_stats_ccnt); |
| 503 | } |
| 504 | |
| 505 | static inline void btrfs_dev_stat_reset(struct btrfs_device *dev, |
| 506 | int index) |
| 507 | { |
| 508 | btrfs_dev_stat_set(dev, index, 0); |
| 509 | } |
| 510 | |
| 511 | void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info); |
| 512 | void btrfs_update_commit_device_bytes_used(struct btrfs_root *root, |
| 513 | struct btrfs_transaction *transaction); |
| 514 | |
| 515 | static inline void lock_chunks(struct btrfs_root *root) |
| 516 | { |
| 517 | mutex_lock(&root->fs_info->chunk_mutex); |
| 518 | } |
| 519 | |
| 520 | static inline void unlock_chunks(struct btrfs_root *root) |
| 521 | { |
| 522 | mutex_unlock(&root->fs_info->chunk_mutex); |
| 523 | } |
| 524 | |
| 525 | struct list_head *btrfs_get_fs_uuids(void); |
| 526 | void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info); |
| 527 | void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info); |
| 528 | |
| 529 | #endif |