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_CTREE__ 20 #define __BTRFS_CTREE__ 21 22 #include <linux/mm.h> 23 #include <linux/highmem.h> 24 #include <linux/fs.h> 25 #include <linux/rwsem.h> 26 #include <linux/semaphore.h> 27 #include <linux/completion.h> 28 #include <linux/backing-dev.h> 29 #include <linux/wait.h> 30 #include <linux/slab.h> 31 #include <linux/kobject.h> 32 #include <trace/events/btrfs.h> 33 #include <asm/kmap_types.h> 34 #include <linux/pagemap.h> 35 #include <linux/btrfs.h> 36 #include <linux/btrfs_tree.h> 37 #include <linux/workqueue.h> 38 #include <linux/security.h> 39 #include <linux/sizes.h> 40 #include "extent_io.h" 41 #include "extent_map.h" 42 #include "async-thread.h" 43 44 struct btrfs_trans_handle; 45 struct btrfs_transaction; 46 struct btrfs_pending_snapshot; 47 extern struct kmem_cache *btrfs_trans_handle_cachep; 48 extern struct kmem_cache *btrfs_transaction_cachep; 49 extern struct kmem_cache *btrfs_bit_radix_cachep; 50 extern struct kmem_cache *btrfs_path_cachep; 51 extern struct kmem_cache *btrfs_free_space_cachep; 52 struct btrfs_ordered_sum; 53 54 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 55 #define STATIC noinline 56 #else 57 #define STATIC static noinline 58 #endif 59 60 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 61 62 #define BTRFS_MAX_MIRRORS 3 63 64 #define BTRFS_MAX_LEVEL 8 65 66 #define BTRFS_COMPAT_EXTENT_TREE_V0 67 68 /* 69 * the max metadata block size. This limit is somewhat artificial, 70 * but the memmove costs go through the roof for larger blocks. 71 */ 72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 73 74 /* 75 * we can actually store much bigger names, but lets not confuse the rest 76 * of linux 77 */ 78 #define BTRFS_NAME_LEN 255 79 80 /* 81 * Theoretical limit is larger, but we keep this down to a sane 82 * value. That should limit greatly the possibility of collisions on 83 * inode ref items. 84 */ 85 #define BTRFS_LINK_MAX 65535U 86 87 static const int btrfs_csum_sizes[] = { 4 }; 88 89 /* four bytes for CRC32 */ 90 #define BTRFS_EMPTY_DIR_SIZE 0 91 92 /* specific to btrfs_map_block(), therefore not in include/linux/blk_types.h */ 93 #define REQ_GET_READ_MIRRORS (1 << 30) 94 95 /* ioprio of readahead is set to idle */ 96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 97 98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 99 100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 101 102 struct btrfs_mapping_tree { 103 struct extent_map_tree map_tree; 104 }; 105 106 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 107 { 108 BUG_ON(num_stripes == 0); 109 return sizeof(struct btrfs_chunk) + 110 sizeof(struct btrfs_stripe) * (num_stripes - 1); 111 } 112 113 /* 114 * File system states 115 */ 116 #define BTRFS_FS_STATE_ERROR 0 117 #define BTRFS_FS_STATE_REMOUNTING 1 118 #define BTRFS_FS_STATE_TRANS_ABORTED 2 119 #define BTRFS_FS_STATE_DEV_REPLACING 3 120 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 121 122 #define BTRFS_BACKREF_REV_MAX 256 123 #define BTRFS_BACKREF_REV_SHIFT 56 124 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 125 BTRFS_BACKREF_REV_SHIFT) 126 127 #define BTRFS_OLD_BACKREF_REV 0 128 #define BTRFS_MIXED_BACKREF_REV 1 129 130 /* 131 * every tree block (leaf or node) starts with this header. 132 */ 133 struct btrfs_header { 134 /* these first four must match the super block */ 135 u8 csum[BTRFS_CSUM_SIZE]; 136 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 137 __le64 bytenr; /* which block this node is supposed to live in */ 138 __le64 flags; 139 140 /* allowed to be different from the super from here on down */ 141 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 142 __le64 generation; 143 __le64 owner; 144 __le32 nritems; 145 u8 level; 146 } __attribute__ ((__packed__)); 147 148 /* 149 * this is a very generous portion of the super block, giving us 150 * room to translate 14 chunks with 3 stripes each. 151 */ 152 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 153 154 /* 155 * just in case we somehow lose the roots and are not able to mount, 156 * we store an array of the roots from previous transactions 157 * in the super. 158 */ 159 #define BTRFS_NUM_BACKUP_ROOTS 4 160 struct btrfs_root_backup { 161 __le64 tree_root; 162 __le64 tree_root_gen; 163 164 __le64 chunk_root; 165 __le64 chunk_root_gen; 166 167 __le64 extent_root; 168 __le64 extent_root_gen; 169 170 __le64 fs_root; 171 __le64 fs_root_gen; 172 173 __le64 dev_root; 174 __le64 dev_root_gen; 175 176 __le64 csum_root; 177 __le64 csum_root_gen; 178 179 __le64 total_bytes; 180 __le64 bytes_used; 181 __le64 num_devices; 182 /* future */ 183 __le64 unused_64[4]; 184 185 u8 tree_root_level; 186 u8 chunk_root_level; 187 u8 extent_root_level; 188 u8 fs_root_level; 189 u8 dev_root_level; 190 u8 csum_root_level; 191 /* future and to align */ 192 u8 unused_8[10]; 193 } __attribute__ ((__packed__)); 194 195 /* 196 * the super block basically lists the main trees of the FS 197 * it currently lacks any block count etc etc 198 */ 199 struct btrfs_super_block { 200 u8 csum[BTRFS_CSUM_SIZE]; 201 /* the first 4 fields must match struct btrfs_header */ 202 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 203 __le64 bytenr; /* this block number */ 204 __le64 flags; 205 206 /* allowed to be different from the btrfs_header from here own down */ 207 __le64 magic; 208 __le64 generation; 209 __le64 root; 210 __le64 chunk_root; 211 __le64 log_root; 212 213 /* this will help find the new super based on the log root */ 214 __le64 log_root_transid; 215 __le64 total_bytes; 216 __le64 bytes_used; 217 __le64 root_dir_objectid; 218 __le64 num_devices; 219 __le32 sectorsize; 220 __le32 nodesize; 221 __le32 __unused_leafsize; 222 __le32 stripesize; 223 __le32 sys_chunk_array_size; 224 __le64 chunk_root_generation; 225 __le64 compat_flags; 226 __le64 compat_ro_flags; 227 __le64 incompat_flags; 228 __le16 csum_type; 229 u8 root_level; 230 u8 chunk_root_level; 231 u8 log_root_level; 232 struct btrfs_dev_item dev_item; 233 234 char label[BTRFS_LABEL_SIZE]; 235 236 __le64 cache_generation; 237 __le64 uuid_tree_generation; 238 239 /* future expansion */ 240 __le64 reserved[30]; 241 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 242 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 243 } __attribute__ ((__packed__)); 244 245 /* 246 * Compat flags that we support. If any incompat flags are set other than the 247 * ones specified below then we will fail to mount 248 */ 249 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 250 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 251 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 252 253 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 254 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE) 255 256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 257 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 258 259 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 260 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 261 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 262 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 263 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 264 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 265 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 268 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 269 270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 273 274 /* 275 * A leaf is full of items. offset and size tell us where to find 276 * the item in the leaf (relative to the start of the data area) 277 */ 278 struct btrfs_item { 279 struct btrfs_disk_key key; 280 __le32 offset; 281 __le32 size; 282 } __attribute__ ((__packed__)); 283 284 /* 285 * leaves have an item area and a data area: 286 * [item0, item1....itemN] [free space] [dataN...data1, data0] 287 * 288 * The data is separate from the items to get the keys closer together 289 * during searches. 290 */ 291 struct btrfs_leaf { 292 struct btrfs_header header; 293 struct btrfs_item items[]; 294 } __attribute__ ((__packed__)); 295 296 /* 297 * all non-leaf blocks are nodes, they hold only keys and pointers to 298 * other blocks 299 */ 300 struct btrfs_key_ptr { 301 struct btrfs_disk_key key; 302 __le64 blockptr; 303 __le64 generation; 304 } __attribute__ ((__packed__)); 305 306 struct btrfs_node { 307 struct btrfs_header header; 308 struct btrfs_key_ptr ptrs[]; 309 } __attribute__ ((__packed__)); 310 311 /* 312 * btrfs_paths remember the path taken from the root down to the leaf. 313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 314 * to any other levels that are present. 315 * 316 * The slots array records the index of the item or block pointer 317 * used while walking the tree. 318 */ 319 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 320 struct btrfs_path { 321 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 322 int slots[BTRFS_MAX_LEVEL]; 323 /* if there is real range locking, this locks field will change */ 324 u8 locks[BTRFS_MAX_LEVEL]; 325 u8 reada; 326 /* keep some upper locks as we walk down */ 327 u8 lowest_level; 328 329 /* 330 * set by btrfs_split_item, tells search_slot to keep all locks 331 * and to force calls to keep space in the nodes 332 */ 333 unsigned int search_for_split:1; 334 unsigned int keep_locks:1; 335 unsigned int skip_locking:1; 336 unsigned int leave_spinning:1; 337 unsigned int search_commit_root:1; 338 unsigned int need_commit_sem:1; 339 unsigned int skip_release_on_error:1; 340 }; 341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ 342 sizeof(struct btrfs_item)) 343 struct btrfs_dev_replace { 344 u64 replace_state; /* see #define above */ 345 u64 time_started; /* seconds since 1-Jan-1970 */ 346 u64 time_stopped; /* seconds since 1-Jan-1970 */ 347 atomic64_t num_write_errors; 348 atomic64_t num_uncorrectable_read_errors; 349 350 u64 cursor_left; 351 u64 committed_cursor_left; 352 u64 cursor_left_last_write_of_item; 353 u64 cursor_right; 354 355 u64 cont_reading_from_srcdev_mode; /* see #define above */ 356 357 int is_valid; 358 int item_needs_writeback; 359 struct btrfs_device *srcdev; 360 struct btrfs_device *tgtdev; 361 362 pid_t lock_owner; 363 atomic_t nesting_level; 364 struct mutex lock_finishing_cancel_unmount; 365 rwlock_t lock; 366 atomic_t read_locks; 367 atomic_t blocking_readers; 368 wait_queue_head_t read_lock_wq; 369 370 struct btrfs_scrub_progress scrub_progress; 371 }; 372 373 /* For raid type sysfs entries */ 374 struct raid_kobject { 375 int raid_type; 376 struct kobject kobj; 377 }; 378 379 struct btrfs_space_info { 380 spinlock_t lock; 381 382 u64 total_bytes; /* total bytes in the space, 383 this doesn't take mirrors into account */ 384 u64 bytes_used; /* total bytes used, 385 this doesn't take mirrors into account */ 386 u64 bytes_pinned; /* total bytes pinned, will be freed when the 387 transaction finishes */ 388 u64 bytes_reserved; /* total bytes the allocator has reserved for 389 current allocations */ 390 u64 bytes_may_use; /* number of bytes that may be used for 391 delalloc/allocations */ 392 u64 bytes_readonly; /* total bytes that are read only */ 393 394 u64 max_extent_size; /* This will hold the maximum extent size of 395 the space info if we had an ENOSPC in the 396 allocator. */ 397 398 unsigned int full:1; /* indicates that we cannot allocate any more 399 chunks for this space */ 400 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 401 402 unsigned int flush:1; /* set if we are trying to make space */ 403 404 unsigned int force_alloc; /* set if we need to force a chunk 405 alloc for this space */ 406 407 u64 disk_used; /* total bytes used on disk */ 408 u64 disk_total; /* total bytes on disk, takes mirrors into 409 account */ 410 411 u64 flags; 412 413 /* 414 * bytes_pinned is kept in line with what is actually pinned, as in 415 * we've called update_block_group and dropped the bytes_used counter 416 * and increased the bytes_pinned counter. However this means that 417 * bytes_pinned does not reflect the bytes that will be pinned once the 418 * delayed refs are flushed, so this counter is inc'ed every time we 419 * call btrfs_free_extent so it is a realtime count of what will be 420 * freed once the transaction is committed. It will be zeroed every 421 * time the transaction commits. 422 */ 423 struct percpu_counter total_bytes_pinned; 424 425 struct list_head list; 426 /* Protected by the spinlock 'lock'. */ 427 struct list_head ro_bgs; 428 struct list_head priority_tickets; 429 struct list_head tickets; 430 431 struct rw_semaphore groups_sem; 432 /* for block groups in our same type */ 433 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 434 wait_queue_head_t wait; 435 436 struct kobject kobj; 437 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 438 }; 439 440 #define BTRFS_BLOCK_RSV_GLOBAL 1 441 #define BTRFS_BLOCK_RSV_DELALLOC 2 442 #define BTRFS_BLOCK_RSV_TRANS 3 443 #define BTRFS_BLOCK_RSV_CHUNK 4 444 #define BTRFS_BLOCK_RSV_DELOPS 5 445 #define BTRFS_BLOCK_RSV_EMPTY 6 446 #define BTRFS_BLOCK_RSV_TEMP 7 447 448 struct btrfs_block_rsv { 449 u64 size; 450 u64 reserved; 451 struct btrfs_space_info *space_info; 452 spinlock_t lock; 453 unsigned short full; 454 unsigned short type; 455 unsigned short failfast; 456 }; 457 458 /* 459 * free clusters are used to claim free space in relatively large chunks, 460 * allowing us to do less seeky writes. They are used for all metadata 461 * allocations and data allocations in ssd mode. 462 */ 463 struct btrfs_free_cluster { 464 spinlock_t lock; 465 spinlock_t refill_lock; 466 struct rb_root root; 467 468 /* largest extent in this cluster */ 469 u64 max_size; 470 471 /* first extent starting offset */ 472 u64 window_start; 473 474 /* We did a full search and couldn't create a cluster */ 475 bool fragmented; 476 477 struct btrfs_block_group_cache *block_group; 478 /* 479 * when a cluster is allocated from a block group, we put the 480 * cluster onto a list in the block group so that it can 481 * be freed before the block group is freed. 482 */ 483 struct list_head block_group_list; 484 }; 485 486 enum btrfs_caching_type { 487 BTRFS_CACHE_NO = 0, 488 BTRFS_CACHE_STARTED = 1, 489 BTRFS_CACHE_FAST = 2, 490 BTRFS_CACHE_FINISHED = 3, 491 BTRFS_CACHE_ERROR = 4, 492 }; 493 494 enum btrfs_disk_cache_state { 495 BTRFS_DC_WRITTEN = 0, 496 BTRFS_DC_ERROR = 1, 497 BTRFS_DC_CLEAR = 2, 498 BTRFS_DC_SETUP = 3, 499 }; 500 501 struct btrfs_caching_control { 502 struct list_head list; 503 struct mutex mutex; 504 wait_queue_head_t wait; 505 struct btrfs_work work; 506 struct btrfs_block_group_cache *block_group; 507 u64 progress; 508 atomic_t count; 509 }; 510 511 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 512 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2) 513 514 struct btrfs_io_ctl { 515 void *cur, *orig; 516 struct page *page; 517 struct page **pages; 518 struct btrfs_root *root; 519 struct inode *inode; 520 unsigned long size; 521 int index; 522 int num_pages; 523 int entries; 524 int bitmaps; 525 unsigned check_crcs:1; 526 }; 527 528 struct btrfs_block_group_cache { 529 struct btrfs_key key; 530 struct btrfs_block_group_item item; 531 struct btrfs_fs_info *fs_info; 532 struct inode *inode; 533 spinlock_t lock; 534 u64 pinned; 535 u64 reserved; 536 u64 delalloc_bytes; 537 u64 bytes_super; 538 u64 flags; 539 u64 cache_generation; 540 u32 sectorsize; 541 542 /* 543 * If the free space extent count exceeds this number, convert the block 544 * group to bitmaps. 545 */ 546 u32 bitmap_high_thresh; 547 548 /* 549 * If the free space extent count drops below this number, convert the 550 * block group back to extents. 551 */ 552 u32 bitmap_low_thresh; 553 554 /* 555 * It is just used for the delayed data space allocation because 556 * only the data space allocation and the relative metadata update 557 * can be done cross the transaction. 558 */ 559 struct rw_semaphore data_rwsem; 560 561 /* for raid56, this is a full stripe, without parity */ 562 unsigned long full_stripe_len; 563 564 unsigned int ro; 565 unsigned int iref:1; 566 unsigned int has_caching_ctl:1; 567 unsigned int removed:1; 568 569 int disk_cache_state; 570 571 /* cache tracking stuff */ 572 int cached; 573 struct btrfs_caching_control *caching_ctl; 574 u64 last_byte_to_unpin; 575 576 struct btrfs_space_info *space_info; 577 578 /* free space cache stuff */ 579 struct btrfs_free_space_ctl *free_space_ctl; 580 581 /* block group cache stuff */ 582 struct rb_node cache_node; 583 584 /* for block groups in the same raid type */ 585 struct list_head list; 586 587 /* usage count */ 588 atomic_t count; 589 590 /* List of struct btrfs_free_clusters for this block group. 591 * Today it will only have one thing on it, but that may change 592 */ 593 struct list_head cluster_list; 594 595 /* For delayed block group creation or deletion of empty block groups */ 596 struct list_head bg_list; 597 598 /* For read-only block groups */ 599 struct list_head ro_list; 600 601 atomic_t trimming; 602 603 /* For dirty block groups */ 604 struct list_head dirty_list; 605 struct list_head io_list; 606 607 struct btrfs_io_ctl io_ctl; 608 609 /* 610 * Incremented when doing extent allocations and holding a read lock 611 * on the space_info's groups_sem semaphore. 612 * Decremented when an ordered extent that represents an IO against this 613 * block group's range is created (after it's added to its inode's 614 * root's list of ordered extents) or immediately after the allocation 615 * if it's a metadata extent or fallocate extent (for these cases we 616 * don't create ordered extents). 617 */ 618 atomic_t reservations; 619 620 /* 621 * Incremented while holding the spinlock *lock* by a task checking if 622 * it can perform a nocow write (incremented if the value for the *ro* 623 * field is 0). Decremented by such tasks once they create an ordered 624 * extent or before that if some error happens before reaching that step. 625 * This is to prevent races between block group relocation and nocow 626 * writes through direct IO. 627 */ 628 atomic_t nocow_writers; 629 630 /* Lock for free space tree operations. */ 631 struct mutex free_space_lock; 632 633 /* 634 * Does the block group need to be added to the free space tree? 635 * Protected by free_space_lock. 636 */ 637 int needs_free_space; 638 }; 639 640 /* delayed seq elem */ 641 struct seq_list { 642 struct list_head list; 643 u64 seq; 644 }; 645 646 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 647 648 enum btrfs_orphan_cleanup_state { 649 ORPHAN_CLEANUP_STARTED = 1, 650 ORPHAN_CLEANUP_DONE = 2, 651 }; 652 653 /* used by the raid56 code to lock stripes for read/modify/write */ 654 struct btrfs_stripe_hash { 655 struct list_head hash_list; 656 wait_queue_head_t wait; 657 spinlock_t lock; 658 }; 659 660 /* used by the raid56 code to lock stripes for read/modify/write */ 661 struct btrfs_stripe_hash_table { 662 struct list_head stripe_cache; 663 spinlock_t cache_lock; 664 int cache_size; 665 struct btrfs_stripe_hash table[]; 666 }; 667 668 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 669 670 void btrfs_init_async_reclaim_work(struct work_struct *work); 671 672 /* fs_info */ 673 struct reloc_control; 674 struct btrfs_device; 675 struct btrfs_fs_devices; 676 struct btrfs_balance_control; 677 struct btrfs_delayed_root; 678 struct btrfs_fs_info { 679 u8 fsid[BTRFS_FSID_SIZE]; 680 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 681 struct btrfs_root *extent_root; 682 struct btrfs_root *tree_root; 683 struct btrfs_root *chunk_root; 684 struct btrfs_root *dev_root; 685 struct btrfs_root *fs_root; 686 struct btrfs_root *csum_root; 687 struct btrfs_root *quota_root; 688 struct btrfs_root *uuid_root; 689 struct btrfs_root *free_space_root; 690 691 /* the log root tree is a directory of all the other log roots */ 692 struct btrfs_root *log_root_tree; 693 694 spinlock_t fs_roots_radix_lock; 695 struct radix_tree_root fs_roots_radix; 696 697 /* block group cache stuff */ 698 spinlock_t block_group_cache_lock; 699 u64 first_logical_byte; 700 struct rb_root block_group_cache_tree; 701 702 /* keep track of unallocated space */ 703 spinlock_t free_chunk_lock; 704 u64 free_chunk_space; 705 706 struct extent_io_tree freed_extents[2]; 707 struct extent_io_tree *pinned_extents; 708 709 /* logical->physical extent mapping */ 710 struct btrfs_mapping_tree mapping_tree; 711 712 /* 713 * block reservation for extent, checksum, root tree and 714 * delayed dir index item 715 */ 716 struct btrfs_block_rsv global_block_rsv; 717 /* block reservation for delay allocation */ 718 struct btrfs_block_rsv delalloc_block_rsv; 719 /* block reservation for metadata operations */ 720 struct btrfs_block_rsv trans_block_rsv; 721 /* block reservation for chunk tree */ 722 struct btrfs_block_rsv chunk_block_rsv; 723 /* block reservation for delayed operations */ 724 struct btrfs_block_rsv delayed_block_rsv; 725 726 struct btrfs_block_rsv empty_block_rsv; 727 728 u64 generation; 729 u64 last_trans_committed; 730 u64 avg_delayed_ref_runtime; 731 732 /* 733 * this is updated to the current trans every time a full commit 734 * is required instead of the faster short fsync log commits 735 */ 736 u64 last_trans_log_full_commit; 737 unsigned long mount_opt; 738 /* 739 * Track requests for actions that need to be done during transaction 740 * commit (like for some mount options). 741 */ 742 unsigned long pending_changes; 743 unsigned long compress_type:4; 744 int commit_interval; 745 /* 746 * It is a suggestive number, the read side is safe even it gets a 747 * wrong number because we will write out the data into a regular 748 * extent. The write side(mount/remount) is under ->s_umount lock, 749 * so it is also safe. 750 */ 751 u64 max_inline; 752 /* 753 * Protected by ->chunk_mutex and sb->s_umount. 754 * 755 * The reason that we use two lock to protect it is because only 756 * remount and mount operations can change it and these two operations 757 * are under sb->s_umount, but the read side (chunk allocation) can not 758 * acquire sb->s_umount or the deadlock would happen. So we use two 759 * locks to protect it. On the write side, we must acquire two locks, 760 * and on the read side, we just need acquire one of them. 761 */ 762 u64 alloc_start; 763 struct btrfs_transaction *running_transaction; 764 wait_queue_head_t transaction_throttle; 765 wait_queue_head_t transaction_wait; 766 wait_queue_head_t transaction_blocked_wait; 767 wait_queue_head_t async_submit_wait; 768 769 /* 770 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 771 * when they are updated. 772 * 773 * Because we do not clear the flags for ever, so we needn't use 774 * the lock on the read side. 775 * 776 * We also needn't use the lock when we mount the fs, because 777 * there is no other task which will update the flag. 778 */ 779 spinlock_t super_lock; 780 struct btrfs_super_block *super_copy; 781 struct btrfs_super_block *super_for_commit; 782 struct block_device *__bdev; 783 struct super_block *sb; 784 struct inode *btree_inode; 785 struct backing_dev_info bdi; 786 struct mutex tree_log_mutex; 787 struct mutex transaction_kthread_mutex; 788 struct mutex cleaner_mutex; 789 struct mutex chunk_mutex; 790 struct mutex volume_mutex; 791 792 /* 793 * this is taken to make sure we don't set block groups ro after 794 * the free space cache has been allocated on them 795 */ 796 struct mutex ro_block_group_mutex; 797 798 /* this is used during read/modify/write to make sure 799 * no two ios are trying to mod the same stripe at the same 800 * time 801 */ 802 struct btrfs_stripe_hash_table *stripe_hash_table; 803 804 /* 805 * this protects the ordered operations list only while we are 806 * processing all of the entries on it. This way we make 807 * sure the commit code doesn't find the list temporarily empty 808 * because another function happens to be doing non-waiting preflush 809 * before jumping into the main commit. 810 */ 811 struct mutex ordered_operations_mutex; 812 813 struct rw_semaphore commit_root_sem; 814 815 struct rw_semaphore cleanup_work_sem; 816 817 struct rw_semaphore subvol_sem; 818 struct srcu_struct subvol_srcu; 819 820 spinlock_t trans_lock; 821 /* 822 * the reloc mutex goes with the trans lock, it is taken 823 * during commit to protect us from the relocation code 824 */ 825 struct mutex reloc_mutex; 826 827 struct list_head trans_list; 828 struct list_head dead_roots; 829 struct list_head caching_block_groups; 830 831 spinlock_t delayed_iput_lock; 832 struct list_head delayed_iputs; 833 struct mutex cleaner_delayed_iput_mutex; 834 835 /* this protects tree_mod_seq_list */ 836 spinlock_t tree_mod_seq_lock; 837 atomic64_t tree_mod_seq; 838 struct list_head tree_mod_seq_list; 839 840 /* this protects tree_mod_log */ 841 rwlock_t tree_mod_log_lock; 842 struct rb_root tree_mod_log; 843 844 atomic_t nr_async_submits; 845 atomic_t async_submit_draining; 846 atomic_t nr_async_bios; 847 atomic_t async_delalloc_pages; 848 atomic_t open_ioctl_trans; 849 850 /* 851 * this is used to protect the following list -- ordered_roots. 852 */ 853 spinlock_t ordered_root_lock; 854 855 /* 856 * all fs/file tree roots in which there are data=ordered extents 857 * pending writeback are added into this list. 858 * 859 * these can span multiple transactions and basically include 860 * every dirty data page that isn't from nodatacow 861 */ 862 struct list_head ordered_roots; 863 864 struct mutex delalloc_root_mutex; 865 spinlock_t delalloc_root_lock; 866 /* all fs/file tree roots that have delalloc inodes. */ 867 struct list_head delalloc_roots; 868 869 /* 870 * there is a pool of worker threads for checksumming during writes 871 * and a pool for checksumming after reads. This is because readers 872 * can run with FS locks held, and the writers may be waiting for 873 * those locks. We don't want ordering in the pending list to cause 874 * deadlocks, and so the two are serviced separately. 875 * 876 * A third pool does submit_bio to avoid deadlocking with the other 877 * two 878 */ 879 struct btrfs_workqueue *workers; 880 struct btrfs_workqueue *delalloc_workers; 881 struct btrfs_workqueue *flush_workers; 882 struct btrfs_workqueue *endio_workers; 883 struct btrfs_workqueue *endio_meta_workers; 884 struct btrfs_workqueue *endio_raid56_workers; 885 struct btrfs_workqueue *endio_repair_workers; 886 struct btrfs_workqueue *rmw_workers; 887 struct btrfs_workqueue *endio_meta_write_workers; 888 struct btrfs_workqueue *endio_write_workers; 889 struct btrfs_workqueue *endio_freespace_worker; 890 struct btrfs_workqueue *submit_workers; 891 struct btrfs_workqueue *caching_workers; 892 struct btrfs_workqueue *readahead_workers; 893 894 /* 895 * fixup workers take dirty pages that didn't properly go through 896 * the cow mechanism and make them safe to write. It happens 897 * for the sys_munmap function call path 898 */ 899 struct btrfs_workqueue *fixup_workers; 900 struct btrfs_workqueue *delayed_workers; 901 902 /* the extent workers do delayed refs on the extent allocation tree */ 903 struct btrfs_workqueue *extent_workers; 904 struct task_struct *transaction_kthread; 905 struct task_struct *cleaner_kthread; 906 int thread_pool_size; 907 908 struct kobject *space_info_kobj; 909 int do_barriers; 910 int closing; 911 int log_root_recovering; 912 int open; 913 914 u64 total_pinned; 915 916 /* used to keep from writing metadata until there is a nice batch */ 917 struct percpu_counter dirty_metadata_bytes; 918 struct percpu_counter delalloc_bytes; 919 s32 dirty_metadata_batch; 920 s32 delalloc_batch; 921 922 struct list_head dirty_cowonly_roots; 923 924 struct btrfs_fs_devices *fs_devices; 925 926 /* 927 * the space_info list is almost entirely read only. It only changes 928 * when we add a new raid type to the FS, and that happens 929 * very rarely. RCU is used to protect it. 930 */ 931 struct list_head space_info; 932 933 struct btrfs_space_info *data_sinfo; 934 935 struct reloc_control *reloc_ctl; 936 937 /* data_alloc_cluster is only used in ssd mode */ 938 struct btrfs_free_cluster data_alloc_cluster; 939 940 /* all metadata allocations go through this cluster */ 941 struct btrfs_free_cluster meta_alloc_cluster; 942 943 /* auto defrag inodes go here */ 944 spinlock_t defrag_inodes_lock; 945 struct rb_root defrag_inodes; 946 atomic_t defrag_running; 947 948 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 949 seqlock_t profiles_lock; 950 /* 951 * these three are in extended format (availability of single 952 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 953 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 954 */ 955 u64 avail_data_alloc_bits; 956 u64 avail_metadata_alloc_bits; 957 u64 avail_system_alloc_bits; 958 959 /* restriper state */ 960 spinlock_t balance_lock; 961 struct mutex balance_mutex; 962 atomic_t balance_running; 963 atomic_t balance_pause_req; 964 atomic_t balance_cancel_req; 965 struct btrfs_balance_control *balance_ctl; 966 wait_queue_head_t balance_wait_q; 967 968 unsigned data_chunk_allocations; 969 unsigned metadata_ratio; 970 971 void *bdev_holder; 972 973 /* private scrub information */ 974 struct mutex scrub_lock; 975 atomic_t scrubs_running; 976 atomic_t scrub_pause_req; 977 atomic_t scrubs_paused; 978 atomic_t scrub_cancel_req; 979 wait_queue_head_t scrub_pause_wait; 980 int scrub_workers_refcnt; 981 struct btrfs_workqueue *scrub_workers; 982 struct btrfs_workqueue *scrub_wr_completion_workers; 983 struct btrfs_workqueue *scrub_nocow_workers; 984 struct btrfs_workqueue *scrub_parity_workers; 985 986 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 987 u32 check_integrity_print_mask; 988 #endif 989 /* 990 * quota information 991 */ 992 unsigned int quota_enabled:1; 993 994 /* 995 * quota_enabled only changes state after a commit. This holds the 996 * next state. 997 */ 998 unsigned int pending_quota_state:1; 999 1000 /* is qgroup tracking in a consistent state? */ 1001 u64 qgroup_flags; 1002 1003 /* holds configuration and tracking. Protected by qgroup_lock */ 1004 struct rb_root qgroup_tree; 1005 struct rb_root qgroup_op_tree; 1006 spinlock_t qgroup_lock; 1007 spinlock_t qgroup_op_lock; 1008 atomic_t qgroup_op_seq; 1009 1010 /* 1011 * used to avoid frequently calling ulist_alloc()/ulist_free() 1012 * when doing qgroup accounting, it must be protected by qgroup_lock. 1013 */ 1014 struct ulist *qgroup_ulist; 1015 1016 /* protect user change for quota operations */ 1017 struct mutex qgroup_ioctl_lock; 1018 1019 /* list of dirty qgroups to be written at next commit */ 1020 struct list_head dirty_qgroups; 1021 1022 /* used by qgroup for an efficient tree traversal */ 1023 u64 qgroup_seq; 1024 1025 /* qgroup rescan items */ 1026 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1027 struct btrfs_key qgroup_rescan_progress; 1028 struct btrfs_workqueue *qgroup_rescan_workers; 1029 struct completion qgroup_rescan_completion; 1030 struct btrfs_work qgroup_rescan_work; 1031 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1032 1033 /* filesystem state */ 1034 unsigned long fs_state; 1035 1036 struct btrfs_delayed_root *delayed_root; 1037 1038 /* readahead tree */ 1039 spinlock_t reada_lock; 1040 struct radix_tree_root reada_tree; 1041 1042 /* readahead works cnt */ 1043 atomic_t reada_works_cnt; 1044 1045 /* Extent buffer radix tree */ 1046 spinlock_t buffer_lock; 1047 struct radix_tree_root buffer_radix; 1048 1049 /* next backup root to be overwritten */ 1050 int backup_root_index; 1051 1052 int num_tolerated_disk_barrier_failures; 1053 1054 /* device replace state */ 1055 struct btrfs_dev_replace dev_replace; 1056 1057 atomic_t mutually_exclusive_operation_running; 1058 1059 struct percpu_counter bio_counter; 1060 wait_queue_head_t replace_wait; 1061 1062 struct semaphore uuid_tree_rescan_sem; 1063 unsigned int update_uuid_tree_gen:1; 1064 1065 /* Used to reclaim the metadata space in the background. */ 1066 struct work_struct async_reclaim_work; 1067 1068 spinlock_t unused_bgs_lock; 1069 struct list_head unused_bgs; 1070 struct mutex unused_bg_unpin_mutex; 1071 struct mutex delete_unused_bgs_mutex; 1072 1073 /* For btrfs to record security options */ 1074 struct security_mnt_opts security_opts; 1075 1076 /* 1077 * Chunks that can't be freed yet (under a trim/discard operation) 1078 * and will be latter freed. Protected by fs_info->chunk_mutex. 1079 */ 1080 struct list_head pinned_chunks; 1081 1082 int creating_free_space_tree; 1083 /* Used to record internally whether fs has been frozen */ 1084 int fs_frozen; 1085 }; 1086 1087 struct btrfs_subvolume_writers { 1088 struct percpu_counter counter; 1089 wait_queue_head_t wait; 1090 }; 1091 1092 /* 1093 * The state of btrfs root 1094 */ 1095 /* 1096 * btrfs_record_root_in_trans is a multi-step process, 1097 * and it can race with the balancing code. But the 1098 * race is very small, and only the first time the root 1099 * is added to each transaction. So IN_TRANS_SETUP 1100 * is used to tell us when more checks are required 1101 */ 1102 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1103 #define BTRFS_ROOT_REF_COWS 1 1104 #define BTRFS_ROOT_TRACK_DIRTY 2 1105 #define BTRFS_ROOT_IN_RADIX 3 1106 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1107 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1108 #define BTRFS_ROOT_FORCE_COW 6 1109 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1110 #define BTRFS_ROOT_DIRTY 8 1111 1112 /* 1113 * in ram representation of the tree. extent_root is used for all allocations 1114 * and for the extent tree extent_root root. 1115 */ 1116 struct btrfs_root { 1117 struct extent_buffer *node; 1118 1119 struct extent_buffer *commit_root; 1120 struct btrfs_root *log_root; 1121 struct btrfs_root *reloc_root; 1122 1123 unsigned long state; 1124 struct btrfs_root_item root_item; 1125 struct btrfs_key root_key; 1126 struct btrfs_fs_info *fs_info; 1127 struct extent_io_tree dirty_log_pages; 1128 1129 struct mutex objectid_mutex; 1130 1131 spinlock_t accounting_lock; 1132 struct btrfs_block_rsv *block_rsv; 1133 1134 /* free ino cache stuff */ 1135 struct btrfs_free_space_ctl *free_ino_ctl; 1136 enum btrfs_caching_type ino_cache_state; 1137 spinlock_t ino_cache_lock; 1138 wait_queue_head_t ino_cache_wait; 1139 struct btrfs_free_space_ctl *free_ino_pinned; 1140 u64 ino_cache_progress; 1141 struct inode *ino_cache_inode; 1142 1143 struct mutex log_mutex; 1144 wait_queue_head_t log_writer_wait; 1145 wait_queue_head_t log_commit_wait[2]; 1146 struct list_head log_ctxs[2]; 1147 atomic_t log_writers; 1148 atomic_t log_commit[2]; 1149 atomic_t log_batch; 1150 int log_transid; 1151 /* No matter the commit succeeds or not*/ 1152 int log_transid_committed; 1153 /* Just be updated when the commit succeeds. */ 1154 int last_log_commit; 1155 pid_t log_start_pid; 1156 1157 u64 objectid; 1158 u64 last_trans; 1159 1160 /* data allocations are done in sectorsize units */ 1161 u32 sectorsize; 1162 1163 /* node allocations are done in nodesize units */ 1164 u32 nodesize; 1165 1166 u32 stripesize; 1167 1168 u32 type; 1169 1170 u64 highest_objectid; 1171 1172 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1173 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1174 u64 alloc_bytenr; 1175 #endif 1176 1177 u64 defrag_trans_start; 1178 struct btrfs_key defrag_progress; 1179 struct btrfs_key defrag_max; 1180 char *name; 1181 1182 /* the dirty list is only used by non-reference counted roots */ 1183 struct list_head dirty_list; 1184 1185 struct list_head root_list; 1186 1187 spinlock_t log_extents_lock[2]; 1188 struct list_head logged_list[2]; 1189 1190 spinlock_t orphan_lock; 1191 atomic_t orphan_inodes; 1192 struct btrfs_block_rsv *orphan_block_rsv; 1193 int orphan_cleanup_state; 1194 1195 spinlock_t inode_lock; 1196 /* red-black tree that keeps track of in-memory inodes */ 1197 struct rb_root inode_tree; 1198 1199 /* 1200 * radix tree that keeps track of delayed nodes of every inode, 1201 * protected by inode_lock 1202 */ 1203 struct radix_tree_root delayed_nodes_tree; 1204 /* 1205 * right now this just gets used so that a root has its own devid 1206 * for stat. It may be used for more later 1207 */ 1208 dev_t anon_dev; 1209 1210 spinlock_t root_item_lock; 1211 atomic_t refs; 1212 1213 struct mutex delalloc_mutex; 1214 spinlock_t delalloc_lock; 1215 /* 1216 * all of the inodes that have delalloc bytes. It is possible for 1217 * this list to be empty even when there is still dirty data=ordered 1218 * extents waiting to finish IO. 1219 */ 1220 struct list_head delalloc_inodes; 1221 struct list_head delalloc_root; 1222 u64 nr_delalloc_inodes; 1223 1224 struct mutex ordered_extent_mutex; 1225 /* 1226 * this is used by the balancing code to wait for all the pending 1227 * ordered extents 1228 */ 1229 spinlock_t ordered_extent_lock; 1230 1231 /* 1232 * all of the data=ordered extents pending writeback 1233 * these can span multiple transactions and basically include 1234 * every dirty data page that isn't from nodatacow 1235 */ 1236 struct list_head ordered_extents; 1237 struct list_head ordered_root; 1238 u64 nr_ordered_extents; 1239 1240 /* 1241 * Number of currently running SEND ioctls to prevent 1242 * manipulation with the read-only status via SUBVOL_SETFLAGS 1243 */ 1244 int send_in_progress; 1245 struct btrfs_subvolume_writers *subv_writers; 1246 atomic_t will_be_snapshoted; 1247 1248 /* For qgroup metadata space reserve */ 1249 atomic_t qgroup_meta_rsv; 1250 }; 1251 1252 static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize) 1253 { 1254 return blocksize - sizeof(struct btrfs_header); 1255 } 1256 1257 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_root *root) 1258 { 1259 return __BTRFS_LEAF_DATA_SIZE(root->nodesize); 1260 } 1261 1262 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_root *root) 1263 { 1264 return BTRFS_LEAF_DATA_SIZE(root) - sizeof(struct btrfs_item); 1265 } 1266 1267 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_root *root) 1268 { 1269 return BTRFS_LEAF_DATA_SIZE(root) / sizeof(struct btrfs_key_ptr); 1270 } 1271 1272 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1273 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1274 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_root *root) 1275 { 1276 return BTRFS_MAX_ITEM_SIZE(root) - 1277 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1278 } 1279 1280 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_root *root) 1281 { 1282 return BTRFS_MAX_ITEM_SIZE(root) - sizeof(struct btrfs_dir_item); 1283 } 1284 1285 /* 1286 * Flags for mount options. 1287 * 1288 * Note: don't forget to add new options to btrfs_show_options() 1289 */ 1290 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1291 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1292 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1293 #define BTRFS_MOUNT_SSD (1 << 3) 1294 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1295 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1296 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1297 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1298 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1299 #define BTRFS_MOUNT_NOSSD (1 << 9) 1300 #define BTRFS_MOUNT_DISCARD (1 << 10) 1301 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1302 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1303 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1304 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1305 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1306 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1307 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1308 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1309 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1310 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1311 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1312 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1313 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1314 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1315 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1316 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1317 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1318 1319 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1320 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1321 1322 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1323 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1324 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1325 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1326 BTRFS_MOUNT_##opt) 1327 1328 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1329 { \ 1330 if (!btrfs_test_opt(fs_info, opt)) \ 1331 btrfs_info(fs_info, fmt, ##args); \ 1332 btrfs_set_opt(fs_info->mount_opt, opt); \ 1333 } 1334 1335 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1336 { \ 1337 if (btrfs_test_opt(fs_info, opt)) \ 1338 btrfs_info(fs_info, fmt, ##args); \ 1339 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1340 } 1341 1342 #ifdef CONFIG_BTRFS_DEBUG 1343 static inline int 1344 btrfs_should_fragment_free_space(struct btrfs_root *root, 1345 struct btrfs_block_group_cache *block_group) 1346 { 1347 return (btrfs_test_opt(root->fs_info, FRAGMENT_METADATA) && 1348 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1349 (btrfs_test_opt(root->fs_info, FRAGMENT_DATA) && 1350 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1351 } 1352 #endif 1353 1354 /* 1355 * Requests for changes that need to be done during transaction commit. 1356 * 1357 * Internal mount options that are used for special handling of the real 1358 * mount options (eg. cannot be set during remount and have to be set during 1359 * transaction commit) 1360 */ 1361 1362 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1363 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1364 #define BTRFS_PENDING_COMMIT (2) 1365 1366 #define btrfs_test_pending(info, opt) \ 1367 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1368 #define btrfs_set_pending(info, opt) \ 1369 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1370 #define btrfs_clear_pending(info, opt) \ 1371 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1372 1373 /* 1374 * Helpers for setting pending mount option changes. 1375 * 1376 * Expects corresponding macros 1377 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1378 */ 1379 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1380 do { \ 1381 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1382 btrfs_info((info), fmt, ##args); \ 1383 btrfs_set_pending((info), SET_##opt); \ 1384 btrfs_clear_pending((info), CLEAR_##opt); \ 1385 } \ 1386 } while(0) 1387 1388 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1389 do { \ 1390 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1391 btrfs_info((info), fmt, ##args); \ 1392 btrfs_set_pending((info), CLEAR_##opt); \ 1393 btrfs_clear_pending((info), SET_##opt); \ 1394 } \ 1395 } while(0) 1396 1397 /* 1398 * Inode flags 1399 */ 1400 #define BTRFS_INODE_NODATASUM (1 << 0) 1401 #define BTRFS_INODE_NODATACOW (1 << 1) 1402 #define BTRFS_INODE_READONLY (1 << 2) 1403 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1404 #define BTRFS_INODE_PREALLOC (1 << 4) 1405 #define BTRFS_INODE_SYNC (1 << 5) 1406 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1407 #define BTRFS_INODE_APPEND (1 << 7) 1408 #define BTRFS_INODE_NODUMP (1 << 8) 1409 #define BTRFS_INODE_NOATIME (1 << 9) 1410 #define BTRFS_INODE_DIRSYNC (1 << 10) 1411 #define BTRFS_INODE_COMPRESS (1 << 11) 1412 1413 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1414 1415 struct btrfs_map_token { 1416 struct extent_buffer *eb; 1417 char *kaddr; 1418 unsigned long offset; 1419 }; 1420 1421 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1422 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1423 1424 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1425 { 1426 token->kaddr = NULL; 1427 } 1428 1429 /* some macros to generate set/get functions for the struct fields. This 1430 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1431 * one for u8: 1432 */ 1433 #define le8_to_cpu(v) (v) 1434 #define cpu_to_le8(v) (v) 1435 #define __le8 u8 1436 1437 #define read_eb_member(eb, ptr, type, member, result) ( \ 1438 read_extent_buffer(eb, (char *)(result), \ 1439 ((unsigned long)(ptr)) + \ 1440 offsetof(type, member), \ 1441 sizeof(((type *)0)->member))) 1442 1443 #define write_eb_member(eb, ptr, type, member, result) ( \ 1444 write_extent_buffer(eb, (char *)(result), \ 1445 ((unsigned long)(ptr)) + \ 1446 offsetof(type, member), \ 1447 sizeof(((type *)0)->member))) 1448 1449 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1450 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ 1451 unsigned long off, \ 1452 struct btrfs_map_token *token); \ 1453 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ 1454 unsigned long off, u##bits val, \ 1455 struct btrfs_map_token *token); \ 1456 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ 1457 unsigned long off) \ 1458 { \ 1459 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1460 } \ 1461 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1462 unsigned long off, u##bits val) \ 1463 { \ 1464 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1465 } 1466 1467 DECLARE_BTRFS_SETGET_BITS(8) 1468 DECLARE_BTRFS_SETGET_BITS(16) 1469 DECLARE_BTRFS_SETGET_BITS(32) 1470 DECLARE_BTRFS_SETGET_BITS(64) 1471 1472 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1473 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ 1474 { \ 1475 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1476 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1477 } \ 1478 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1479 u##bits val) \ 1480 { \ 1481 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1482 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1483 } \ 1484 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ 1485 struct btrfs_map_token *token) \ 1486 { \ 1487 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1488 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1489 } \ 1490 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1491 type *s, u##bits val, \ 1492 struct btrfs_map_token *token) \ 1493 { \ 1494 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1495 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1496 } 1497 1498 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1499 static inline u##bits btrfs_##name(struct extent_buffer *eb) \ 1500 { \ 1501 type *p = page_address(eb->pages[0]); \ 1502 u##bits res = le##bits##_to_cpu(p->member); \ 1503 return res; \ 1504 } \ 1505 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1506 u##bits val) \ 1507 { \ 1508 type *p = page_address(eb->pages[0]); \ 1509 p->member = cpu_to_le##bits(val); \ 1510 } 1511 1512 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1513 static inline u##bits btrfs_##name(type *s) \ 1514 { \ 1515 return le##bits##_to_cpu(s->member); \ 1516 } \ 1517 static inline void btrfs_set_##name(type *s, u##bits val) \ 1518 { \ 1519 s->member = cpu_to_le##bits(val); \ 1520 } 1521 1522 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1523 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); 1524 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1525 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1526 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1527 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1528 start_offset, 64); 1529 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1530 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1531 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1532 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1533 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1534 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1535 1536 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1537 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1538 total_bytes, 64); 1539 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1540 bytes_used, 64); 1541 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1542 io_align, 32); 1543 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1544 io_width, 32); 1545 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1546 sector_size, 32); 1547 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1548 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1549 dev_group, 32); 1550 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1551 seek_speed, 8); 1552 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1553 bandwidth, 8); 1554 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1555 generation, 64); 1556 1557 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1558 { 1559 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1560 } 1561 1562 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1563 { 1564 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1565 } 1566 1567 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1568 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1569 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1570 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1571 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1572 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1573 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1574 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1575 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1576 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1577 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1578 1579 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1580 { 1581 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1582 } 1583 1584 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1585 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1586 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1587 stripe_len, 64); 1588 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1589 io_align, 32); 1590 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1591 io_width, 32); 1592 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1593 sector_size, 32); 1594 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1595 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1596 num_stripes, 16); 1597 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1598 sub_stripes, 16); 1599 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1600 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1601 1602 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1603 int nr) 1604 { 1605 unsigned long offset = (unsigned long)c; 1606 offset += offsetof(struct btrfs_chunk, stripe); 1607 offset += nr * sizeof(struct btrfs_stripe); 1608 return (struct btrfs_stripe *)offset; 1609 } 1610 1611 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1612 { 1613 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1614 } 1615 1616 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1617 struct btrfs_chunk *c, int nr) 1618 { 1619 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1620 } 1621 1622 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1623 struct btrfs_chunk *c, int nr) 1624 { 1625 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1626 } 1627 1628 /* struct btrfs_block_group_item */ 1629 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1630 used, 64); 1631 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1632 used, 64); 1633 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1634 struct btrfs_block_group_item, chunk_objectid, 64); 1635 1636 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1637 struct btrfs_block_group_item, chunk_objectid, 64); 1638 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1639 struct btrfs_block_group_item, flags, 64); 1640 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1641 struct btrfs_block_group_item, flags, 64); 1642 1643 /* struct btrfs_free_space_info */ 1644 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1645 extent_count, 32); 1646 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1647 1648 /* struct btrfs_inode_ref */ 1649 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1650 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1651 1652 /* struct btrfs_inode_extref */ 1653 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1654 parent_objectid, 64); 1655 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1656 name_len, 16); 1657 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1658 1659 /* struct btrfs_inode_item */ 1660 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1661 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1662 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1663 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1664 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1665 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1666 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1667 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1668 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1669 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1670 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1671 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1672 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1673 generation, 64); 1674 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1675 sequence, 64); 1676 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1677 transid, 64); 1678 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1679 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1680 nbytes, 64); 1681 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1682 block_group, 64); 1683 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1686 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1688 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1689 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1690 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1691 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1692 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1693 1694 /* struct btrfs_dev_extent */ 1695 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1696 chunk_tree, 64); 1697 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1698 chunk_objectid, 64); 1699 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1700 chunk_offset, 64); 1701 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1702 1703 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1704 { 1705 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1706 return (unsigned long)dev + ptr; 1707 } 1708 1709 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1710 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1711 generation, 64); 1712 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1713 1714 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1715 1716 1717 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1718 1719 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1720 struct btrfs_tree_block_info *item, 1721 struct btrfs_disk_key *key) 1722 { 1723 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1724 } 1725 1726 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1727 struct btrfs_tree_block_info *item, 1728 struct btrfs_disk_key *key) 1729 { 1730 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1731 } 1732 1733 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1734 root, 64); 1735 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1736 objectid, 64); 1737 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1738 offset, 64); 1739 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1740 count, 32); 1741 1742 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1743 count, 32); 1744 1745 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1746 type, 8); 1747 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1748 offset, 64); 1749 1750 static inline u32 btrfs_extent_inline_ref_size(int type) 1751 { 1752 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1753 type == BTRFS_SHARED_BLOCK_REF_KEY) 1754 return sizeof(struct btrfs_extent_inline_ref); 1755 if (type == BTRFS_SHARED_DATA_REF_KEY) 1756 return sizeof(struct btrfs_shared_data_ref) + 1757 sizeof(struct btrfs_extent_inline_ref); 1758 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1759 return sizeof(struct btrfs_extent_data_ref) + 1760 offsetof(struct btrfs_extent_inline_ref, offset); 1761 BUG(); 1762 return 0; 1763 } 1764 1765 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1766 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1767 generation, 64); 1768 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1769 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1770 1771 /* struct btrfs_node */ 1772 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1773 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1774 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1775 blockptr, 64); 1776 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1777 generation, 64); 1778 1779 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1780 { 1781 unsigned long ptr; 1782 ptr = offsetof(struct btrfs_node, ptrs) + 1783 sizeof(struct btrfs_key_ptr) * nr; 1784 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1785 } 1786 1787 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1788 int nr, u64 val) 1789 { 1790 unsigned long ptr; 1791 ptr = offsetof(struct btrfs_node, ptrs) + 1792 sizeof(struct btrfs_key_ptr) * nr; 1793 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1794 } 1795 1796 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1797 { 1798 unsigned long ptr; 1799 ptr = offsetof(struct btrfs_node, ptrs) + 1800 sizeof(struct btrfs_key_ptr) * nr; 1801 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1802 } 1803 1804 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1805 int nr, u64 val) 1806 { 1807 unsigned long ptr; 1808 ptr = offsetof(struct btrfs_node, ptrs) + 1809 sizeof(struct btrfs_key_ptr) * nr; 1810 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1811 } 1812 1813 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1814 { 1815 return offsetof(struct btrfs_node, ptrs) + 1816 sizeof(struct btrfs_key_ptr) * nr; 1817 } 1818 1819 void btrfs_node_key(struct extent_buffer *eb, 1820 struct btrfs_disk_key *disk_key, int nr); 1821 1822 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1823 struct btrfs_disk_key *disk_key, int nr) 1824 { 1825 unsigned long ptr; 1826 ptr = btrfs_node_key_ptr_offset(nr); 1827 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1828 struct btrfs_key_ptr, key, disk_key); 1829 } 1830 1831 /* struct btrfs_item */ 1832 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1833 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1834 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1835 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1836 1837 static inline unsigned long btrfs_item_nr_offset(int nr) 1838 { 1839 return offsetof(struct btrfs_leaf, items) + 1840 sizeof(struct btrfs_item) * nr; 1841 } 1842 1843 static inline struct btrfs_item *btrfs_item_nr(int nr) 1844 { 1845 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1846 } 1847 1848 static inline u32 btrfs_item_end(struct extent_buffer *eb, 1849 struct btrfs_item *item) 1850 { 1851 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1852 } 1853 1854 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) 1855 { 1856 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1857 } 1858 1859 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) 1860 { 1861 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1862 } 1863 1864 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) 1865 { 1866 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1867 } 1868 1869 static inline void btrfs_item_key(struct extent_buffer *eb, 1870 struct btrfs_disk_key *disk_key, int nr) 1871 { 1872 struct btrfs_item *item = btrfs_item_nr(nr); 1873 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1874 } 1875 1876 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1877 struct btrfs_disk_key *disk_key, int nr) 1878 { 1879 struct btrfs_item *item = btrfs_item_nr(nr); 1880 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1881 } 1882 1883 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1884 1885 /* 1886 * struct btrfs_root_ref 1887 */ 1888 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1889 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1890 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1891 1892 /* struct btrfs_dir_item */ 1893 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1894 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1895 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1896 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1897 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1898 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1899 data_len, 16); 1900 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1901 name_len, 16); 1902 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1903 transid, 64); 1904 1905 static inline void btrfs_dir_item_key(struct extent_buffer *eb, 1906 struct btrfs_dir_item *item, 1907 struct btrfs_disk_key *key) 1908 { 1909 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1910 } 1911 1912 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1913 struct btrfs_dir_item *item, 1914 struct btrfs_disk_key *key) 1915 { 1916 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1917 } 1918 1919 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1920 num_entries, 64); 1921 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1922 num_bitmaps, 64); 1923 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1924 generation, 64); 1925 1926 static inline void btrfs_free_space_key(struct extent_buffer *eb, 1927 struct btrfs_free_space_header *h, 1928 struct btrfs_disk_key *key) 1929 { 1930 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1931 } 1932 1933 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1934 struct btrfs_free_space_header *h, 1935 struct btrfs_disk_key *key) 1936 { 1937 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1938 } 1939 1940 /* struct btrfs_disk_key */ 1941 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1942 objectid, 64); 1943 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1944 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1945 1946 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1947 struct btrfs_disk_key *disk) 1948 { 1949 cpu->offset = le64_to_cpu(disk->offset); 1950 cpu->type = disk->type; 1951 cpu->objectid = le64_to_cpu(disk->objectid); 1952 } 1953 1954 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1955 struct btrfs_key *cpu) 1956 { 1957 disk->offset = cpu_to_le64(cpu->offset); 1958 disk->type = cpu->type; 1959 disk->objectid = cpu_to_le64(cpu->objectid); 1960 } 1961 1962 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, 1963 struct btrfs_key *key, int nr) 1964 { 1965 struct btrfs_disk_key disk_key; 1966 btrfs_node_key(eb, &disk_key, nr); 1967 btrfs_disk_key_to_cpu(key, &disk_key); 1968 } 1969 1970 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, 1971 struct btrfs_key *key, int nr) 1972 { 1973 struct btrfs_disk_key disk_key; 1974 btrfs_item_key(eb, &disk_key, nr); 1975 btrfs_disk_key_to_cpu(key, &disk_key); 1976 } 1977 1978 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, 1979 struct btrfs_dir_item *item, 1980 struct btrfs_key *key) 1981 { 1982 struct btrfs_disk_key disk_key; 1983 btrfs_dir_item_key(eb, item, &disk_key); 1984 btrfs_disk_key_to_cpu(key, &disk_key); 1985 } 1986 1987 1988 static inline u8 btrfs_key_type(struct btrfs_key *key) 1989 { 1990 return key->type; 1991 } 1992 1993 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 1994 { 1995 key->type = val; 1996 } 1997 1998 /* struct btrfs_header */ 1999 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2000 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2001 generation, 64); 2002 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2003 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2004 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2005 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2006 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2007 generation, 64); 2008 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2009 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2010 nritems, 32); 2011 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2012 2013 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) 2014 { 2015 return (btrfs_header_flags(eb) & flag) == flag; 2016 } 2017 2018 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2019 { 2020 u64 flags = btrfs_header_flags(eb); 2021 btrfs_set_header_flags(eb, flags | flag); 2022 return (flags & flag) == flag; 2023 } 2024 2025 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2026 { 2027 u64 flags = btrfs_header_flags(eb); 2028 btrfs_set_header_flags(eb, flags & ~flag); 2029 return (flags & flag) == flag; 2030 } 2031 2032 static inline int btrfs_header_backref_rev(struct extent_buffer *eb) 2033 { 2034 u64 flags = btrfs_header_flags(eb); 2035 return flags >> BTRFS_BACKREF_REV_SHIFT; 2036 } 2037 2038 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2039 int rev) 2040 { 2041 u64 flags = btrfs_header_flags(eb); 2042 flags &= ~BTRFS_BACKREF_REV_MASK; 2043 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2044 btrfs_set_header_flags(eb, flags); 2045 } 2046 2047 static inline unsigned long btrfs_header_fsid(void) 2048 { 2049 return offsetof(struct btrfs_header, fsid); 2050 } 2051 2052 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) 2053 { 2054 return offsetof(struct btrfs_header, chunk_tree_uuid); 2055 } 2056 2057 static inline int btrfs_is_leaf(struct extent_buffer *eb) 2058 { 2059 return btrfs_header_level(eb) == 0; 2060 } 2061 2062 /* struct btrfs_root_item */ 2063 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2064 generation, 64); 2065 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2066 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2067 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2068 2069 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2070 generation, 64); 2071 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2072 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2073 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2074 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2075 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2076 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2077 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2078 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2079 last_snapshot, 64); 2080 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2081 generation_v2, 64); 2082 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2083 ctransid, 64); 2084 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2085 otransid, 64); 2086 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2087 stransid, 64); 2088 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2089 rtransid, 64); 2090 2091 static inline bool btrfs_root_readonly(struct btrfs_root *root) 2092 { 2093 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2094 } 2095 2096 static inline bool btrfs_root_dead(struct btrfs_root *root) 2097 { 2098 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2099 } 2100 2101 /* struct btrfs_root_backup */ 2102 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2103 tree_root, 64); 2104 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2105 tree_root_gen, 64); 2106 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2107 tree_root_level, 8); 2108 2109 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2110 chunk_root, 64); 2111 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2112 chunk_root_gen, 64); 2113 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2114 chunk_root_level, 8); 2115 2116 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2117 extent_root, 64); 2118 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2119 extent_root_gen, 64); 2120 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2121 extent_root_level, 8); 2122 2123 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2124 fs_root, 64); 2125 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2126 fs_root_gen, 64); 2127 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2128 fs_root_level, 8); 2129 2130 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2131 dev_root, 64); 2132 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2133 dev_root_gen, 64); 2134 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2135 dev_root_level, 8); 2136 2137 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2138 csum_root, 64); 2139 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2140 csum_root_gen, 64); 2141 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2142 csum_root_level, 8); 2143 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2144 total_bytes, 64); 2145 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2146 bytes_used, 64); 2147 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2148 num_devices, 64); 2149 2150 /* struct btrfs_balance_item */ 2151 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2152 2153 static inline void btrfs_balance_data(struct extent_buffer *eb, 2154 struct btrfs_balance_item *bi, 2155 struct btrfs_disk_balance_args *ba) 2156 { 2157 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2158 } 2159 2160 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2161 struct btrfs_balance_item *bi, 2162 struct btrfs_disk_balance_args *ba) 2163 { 2164 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2165 } 2166 2167 static inline void btrfs_balance_meta(struct extent_buffer *eb, 2168 struct btrfs_balance_item *bi, 2169 struct btrfs_disk_balance_args *ba) 2170 { 2171 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2172 } 2173 2174 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2175 struct btrfs_balance_item *bi, 2176 struct btrfs_disk_balance_args *ba) 2177 { 2178 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2179 } 2180 2181 static inline void btrfs_balance_sys(struct extent_buffer *eb, 2182 struct btrfs_balance_item *bi, 2183 struct btrfs_disk_balance_args *ba) 2184 { 2185 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2186 } 2187 2188 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2189 struct btrfs_balance_item *bi, 2190 struct btrfs_disk_balance_args *ba) 2191 { 2192 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2193 } 2194 2195 static inline void 2196 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2197 struct btrfs_disk_balance_args *disk) 2198 { 2199 memset(cpu, 0, sizeof(*cpu)); 2200 2201 cpu->profiles = le64_to_cpu(disk->profiles); 2202 cpu->usage = le64_to_cpu(disk->usage); 2203 cpu->devid = le64_to_cpu(disk->devid); 2204 cpu->pstart = le64_to_cpu(disk->pstart); 2205 cpu->pend = le64_to_cpu(disk->pend); 2206 cpu->vstart = le64_to_cpu(disk->vstart); 2207 cpu->vend = le64_to_cpu(disk->vend); 2208 cpu->target = le64_to_cpu(disk->target); 2209 cpu->flags = le64_to_cpu(disk->flags); 2210 cpu->limit = le64_to_cpu(disk->limit); 2211 } 2212 2213 static inline void 2214 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2215 struct btrfs_balance_args *cpu) 2216 { 2217 memset(disk, 0, sizeof(*disk)); 2218 2219 disk->profiles = cpu_to_le64(cpu->profiles); 2220 disk->usage = cpu_to_le64(cpu->usage); 2221 disk->devid = cpu_to_le64(cpu->devid); 2222 disk->pstart = cpu_to_le64(cpu->pstart); 2223 disk->pend = cpu_to_le64(cpu->pend); 2224 disk->vstart = cpu_to_le64(cpu->vstart); 2225 disk->vend = cpu_to_le64(cpu->vend); 2226 disk->target = cpu_to_le64(cpu->target); 2227 disk->flags = cpu_to_le64(cpu->flags); 2228 disk->limit = cpu_to_le64(cpu->limit); 2229 } 2230 2231 /* struct btrfs_super_block */ 2232 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2233 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2234 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2235 generation, 64); 2236 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2237 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2238 struct btrfs_super_block, sys_chunk_array_size, 32); 2239 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2240 struct btrfs_super_block, chunk_root_generation, 64); 2241 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2242 root_level, 8); 2243 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2244 chunk_root, 64); 2245 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2246 chunk_root_level, 8); 2247 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2248 log_root, 64); 2249 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2250 log_root_transid, 64); 2251 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2252 log_root_level, 8); 2253 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2254 total_bytes, 64); 2255 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2256 bytes_used, 64); 2257 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2258 sectorsize, 32); 2259 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2260 nodesize, 32); 2261 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2262 stripesize, 32); 2263 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2264 root_dir_objectid, 64); 2265 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2266 num_devices, 64); 2267 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2268 compat_flags, 64); 2269 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2270 compat_ro_flags, 64); 2271 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2272 incompat_flags, 64); 2273 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2274 csum_type, 16); 2275 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2276 cache_generation, 64); 2277 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2278 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2279 uuid_tree_generation, 64); 2280 2281 static inline int btrfs_super_csum_size(struct btrfs_super_block *s) 2282 { 2283 u16 t = btrfs_super_csum_type(s); 2284 /* 2285 * csum type is validated at mount time 2286 */ 2287 return btrfs_csum_sizes[t]; 2288 } 2289 2290 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) 2291 { 2292 return offsetof(struct btrfs_leaf, items); 2293 } 2294 2295 /* struct btrfs_file_extent_item */ 2296 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2297 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2298 struct btrfs_file_extent_item, disk_bytenr, 64); 2299 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2300 struct btrfs_file_extent_item, offset, 64); 2301 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2302 struct btrfs_file_extent_item, generation, 64); 2303 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2304 struct btrfs_file_extent_item, num_bytes, 64); 2305 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2306 struct btrfs_file_extent_item, disk_num_bytes, 64); 2307 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2308 struct btrfs_file_extent_item, compression, 8); 2309 2310 static inline unsigned long 2311 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) 2312 { 2313 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2314 } 2315 2316 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2317 { 2318 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2319 } 2320 2321 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2322 disk_bytenr, 64); 2323 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2324 generation, 64); 2325 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2326 disk_num_bytes, 64); 2327 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2328 offset, 64); 2329 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2330 num_bytes, 64); 2331 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2332 ram_bytes, 64); 2333 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2334 compression, 8); 2335 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2336 encryption, 8); 2337 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2338 other_encoding, 16); 2339 2340 /* 2341 * this returns the number of bytes used by the item on disk, minus the 2342 * size of any extent headers. If a file is compressed on disk, this is 2343 * the compressed size 2344 */ 2345 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, 2346 struct btrfs_item *e) 2347 { 2348 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2349 } 2350 2351 /* this returns the number of file bytes represented by the inline item. 2352 * If an item is compressed, this is the uncompressed size 2353 */ 2354 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, 2355 int slot, 2356 struct btrfs_file_extent_item *fi) 2357 { 2358 struct btrfs_map_token token; 2359 2360 btrfs_init_map_token(&token); 2361 /* 2362 * return the space used on disk if this item isn't 2363 * compressed or encoded 2364 */ 2365 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2366 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2367 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2368 return btrfs_file_extent_inline_item_len(eb, 2369 btrfs_item_nr(slot)); 2370 } 2371 2372 /* otherwise use the ram bytes field */ 2373 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2374 } 2375 2376 2377 /* btrfs_dev_stats_item */ 2378 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, 2379 struct btrfs_dev_stats_item *ptr, 2380 int index) 2381 { 2382 u64 val; 2383 2384 read_extent_buffer(eb, &val, 2385 offsetof(struct btrfs_dev_stats_item, values) + 2386 ((unsigned long)ptr) + (index * sizeof(u64)), 2387 sizeof(val)); 2388 return val; 2389 } 2390 2391 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2392 struct btrfs_dev_stats_item *ptr, 2393 int index, u64 val) 2394 { 2395 write_extent_buffer(eb, &val, 2396 offsetof(struct btrfs_dev_stats_item, values) + 2397 ((unsigned long)ptr) + (index * sizeof(u64)), 2398 sizeof(val)); 2399 } 2400 2401 /* btrfs_qgroup_status_item */ 2402 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2403 generation, 64); 2404 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2405 version, 64); 2406 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2407 flags, 64); 2408 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2409 rescan, 64); 2410 2411 /* btrfs_qgroup_info_item */ 2412 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2413 generation, 64); 2414 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2415 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2416 rfer_cmpr, 64); 2417 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2418 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2419 excl_cmpr, 64); 2420 2421 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2422 struct btrfs_qgroup_info_item, generation, 64); 2423 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2424 rfer, 64); 2425 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2426 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2427 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2428 excl, 64); 2429 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2430 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2431 2432 /* btrfs_qgroup_limit_item */ 2433 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2434 flags, 64); 2435 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2436 max_rfer, 64); 2437 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2438 max_excl, 64); 2439 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2440 rsv_rfer, 64); 2441 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2442 rsv_excl, 64); 2443 2444 /* btrfs_dev_replace_item */ 2445 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2446 struct btrfs_dev_replace_item, src_devid, 64); 2447 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2448 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2449 64); 2450 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2451 replace_state, 64); 2452 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2453 time_started, 64); 2454 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2455 time_stopped, 64); 2456 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2457 num_write_errors, 64); 2458 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2459 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2460 64); 2461 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2462 cursor_left, 64); 2463 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2464 cursor_right, 64); 2465 2466 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2467 struct btrfs_dev_replace_item, src_devid, 64); 2468 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2469 struct btrfs_dev_replace_item, 2470 cont_reading_from_srcdev_mode, 64); 2471 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2472 struct btrfs_dev_replace_item, replace_state, 64); 2473 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2474 struct btrfs_dev_replace_item, time_started, 64); 2475 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2476 struct btrfs_dev_replace_item, time_stopped, 64); 2477 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2478 struct btrfs_dev_replace_item, num_write_errors, 64); 2479 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2480 struct btrfs_dev_replace_item, 2481 num_uncorrectable_read_errors, 64); 2482 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2483 struct btrfs_dev_replace_item, cursor_left, 64); 2484 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2485 struct btrfs_dev_replace_item, cursor_right, 64); 2486 2487 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 2488 { 2489 return sb->s_fs_info; 2490 } 2491 2492 /* helper function to cast into the data area of the leaf. */ 2493 #define btrfs_item_ptr(leaf, slot, type) \ 2494 ((type *)(btrfs_leaf_data(leaf) + \ 2495 btrfs_item_offset_nr(leaf, slot))) 2496 2497 #define btrfs_item_ptr_offset(leaf, slot) \ 2498 ((unsigned long)(btrfs_leaf_data(leaf) + \ 2499 btrfs_item_offset_nr(leaf, slot))) 2500 2501 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2502 { 2503 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2504 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2505 } 2506 2507 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2508 { 2509 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2510 } 2511 2512 /* extent-tree.c */ 2513 2514 u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes); 2515 2516 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root, 2517 unsigned num_items) 2518 { 2519 return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2520 } 2521 2522 /* 2523 * Doing a truncate won't result in new nodes or leaves, just what we need for 2524 * COW. 2525 */ 2526 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_root *root, 2527 unsigned num_items) 2528 { 2529 return root->nodesize * BTRFS_MAX_LEVEL * num_items; 2530 } 2531 2532 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2533 struct btrfs_root *root); 2534 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2535 struct btrfs_root *root); 2536 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2537 const u64 start); 2538 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2539 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2540 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2541 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2542 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2543 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2544 struct btrfs_root *root, unsigned long count); 2545 int btrfs_async_run_delayed_refs(struct btrfs_root *root, 2546 unsigned long count, u64 transid, int wait); 2547 int btrfs_lookup_data_extent(struct btrfs_root *root, u64 start, u64 len); 2548 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2549 struct btrfs_root *root, u64 bytenr, 2550 u64 offset, int metadata, u64 *refs, u64 *flags); 2551 int btrfs_pin_extent(struct btrfs_root *root, 2552 u64 bytenr, u64 num, int reserved); 2553 int btrfs_pin_extent_for_log_replay(struct btrfs_root *root, 2554 u64 bytenr, u64 num_bytes); 2555 int btrfs_exclude_logged_extents(struct btrfs_root *root, 2556 struct extent_buffer *eb); 2557 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, 2558 struct btrfs_root *root, 2559 u64 objectid, u64 offset, u64 bytenr); 2560 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2561 struct btrfs_fs_info *info, 2562 u64 bytenr); 2563 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2564 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2565 int get_block_group_index(struct btrfs_block_group_cache *cache); 2566 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2567 struct btrfs_root *root, u64 parent, 2568 u64 root_objectid, 2569 struct btrfs_disk_key *key, int level, 2570 u64 hint, u64 empty_size); 2571 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2572 struct btrfs_root *root, 2573 struct extent_buffer *buf, 2574 u64 parent, int last_ref); 2575 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2576 struct btrfs_root *root, 2577 u64 root_objectid, u64 owner, 2578 u64 offset, u64 ram_bytes, 2579 struct btrfs_key *ins); 2580 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2581 struct btrfs_root *root, 2582 u64 root_objectid, u64 owner, u64 offset, 2583 struct btrfs_key *ins); 2584 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2585 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2586 struct btrfs_key *ins, int is_data, int delalloc); 2587 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2588 struct extent_buffer *buf, int full_backref); 2589 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2590 struct extent_buffer *buf, int full_backref); 2591 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2592 struct btrfs_root *root, 2593 u64 bytenr, u64 num_bytes, u64 flags, 2594 int level, int is_data); 2595 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2596 struct btrfs_root *root, 2597 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2598 u64 owner, u64 offset); 2599 2600 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len, 2601 int delalloc); 2602 int btrfs_free_and_pin_reserved_extent(struct btrfs_root *root, 2603 u64 start, u64 len); 2604 void btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, 2605 struct btrfs_root *root); 2606 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2607 struct btrfs_root *root); 2608 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2609 struct btrfs_root *root, 2610 u64 bytenr, u64 num_bytes, u64 parent, 2611 u64 root_objectid, u64 owner, u64 offset); 2612 2613 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, 2614 struct btrfs_root *root); 2615 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2616 struct btrfs_root *root); 2617 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2618 struct btrfs_root *root); 2619 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); 2620 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2621 int btrfs_read_block_groups(struct btrfs_root *root); 2622 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); 2623 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2624 struct btrfs_root *root, u64 bytes_used, 2625 u64 type, u64 chunk_objectid, u64 chunk_offset, 2626 u64 size); 2627 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2628 struct btrfs_fs_info *fs_info, 2629 const u64 chunk_offset); 2630 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2631 struct btrfs_root *root, u64 group_start, 2632 struct extent_map *em); 2633 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2634 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2635 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2636 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, 2637 struct btrfs_root *root); 2638 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); 2639 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2640 2641 enum btrfs_reserve_flush_enum { 2642 /* If we are in the transaction, we can't flush anything.*/ 2643 BTRFS_RESERVE_NO_FLUSH, 2644 /* 2645 * Flushing delalloc may cause deadlock somewhere, in this 2646 * case, use FLUSH LIMIT 2647 */ 2648 BTRFS_RESERVE_FLUSH_LIMIT, 2649 BTRFS_RESERVE_FLUSH_ALL, 2650 }; 2651 2652 enum btrfs_flush_state { 2653 FLUSH_DELAYED_ITEMS_NR = 1, 2654 FLUSH_DELAYED_ITEMS = 2, 2655 FLUSH_DELALLOC = 3, 2656 FLUSH_DELALLOC_WAIT = 4, 2657 ALLOC_CHUNK = 5, 2658 COMMIT_TRANS = 6, 2659 }; 2660 2661 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len); 2662 int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes); 2663 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len); 2664 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2665 u64 len); 2666 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, 2667 struct btrfs_root *root); 2668 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2669 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2670 struct inode *inode); 2671 void btrfs_orphan_release_metadata(struct inode *inode); 2672 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2673 struct btrfs_block_rsv *rsv, 2674 int nitems, 2675 u64 *qgroup_reserved, bool use_global_rsv); 2676 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2677 struct btrfs_block_rsv *rsv, 2678 u64 qgroup_reserved); 2679 int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); 2680 void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); 2681 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len); 2682 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len); 2683 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2684 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root, 2685 unsigned short type); 2686 void btrfs_free_block_rsv(struct btrfs_root *root, 2687 struct btrfs_block_rsv *rsv); 2688 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2689 int btrfs_block_rsv_add(struct btrfs_root *root, 2690 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2691 enum btrfs_reserve_flush_enum flush); 2692 int btrfs_block_rsv_check(struct btrfs_root *root, 2693 struct btrfs_block_rsv *block_rsv, int min_factor); 2694 int btrfs_block_rsv_refill(struct btrfs_root *root, 2695 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2696 enum btrfs_reserve_flush_enum flush); 2697 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2698 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2699 int update_size); 2700 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2701 struct btrfs_block_rsv *dest, u64 num_bytes, 2702 int min_factor); 2703 void btrfs_block_rsv_release(struct btrfs_root *root, 2704 struct btrfs_block_rsv *block_rsv, 2705 u64 num_bytes); 2706 int btrfs_inc_block_group_ro(struct btrfs_root *root, 2707 struct btrfs_block_group_cache *cache); 2708 void btrfs_dec_block_group_ro(struct btrfs_root *root, 2709 struct btrfs_block_group_cache *cache); 2710 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2711 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2712 int btrfs_error_unpin_extent_range(struct btrfs_root *root, 2713 u64 start, u64 end); 2714 int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, 2715 u64 num_bytes, u64 *actual_bytes); 2716 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2717 struct btrfs_root *root, u64 type); 2718 int btrfs_trim_fs(struct btrfs_root *root, struct fstrim_range *range); 2719 2720 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2721 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2722 struct btrfs_fs_info *fs_info); 2723 int __get_raid_index(u64 flags); 2724 int btrfs_start_write_no_snapshoting(struct btrfs_root *root); 2725 void btrfs_end_write_no_snapshoting(struct btrfs_root *root); 2726 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2727 void check_system_chunk(struct btrfs_trans_handle *trans, 2728 struct btrfs_root *root, 2729 const u64 type); 2730 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2731 struct btrfs_fs_info *info, u64 start, u64 end); 2732 2733 /* ctree.c */ 2734 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, 2735 int level, int *slot); 2736 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); 2737 int btrfs_previous_item(struct btrfs_root *root, 2738 struct btrfs_path *path, u64 min_objectid, 2739 int type); 2740 int btrfs_previous_extent_item(struct btrfs_root *root, 2741 struct btrfs_path *path, u64 min_objectid); 2742 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2743 struct btrfs_path *path, 2744 struct btrfs_key *new_key); 2745 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2746 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2747 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2748 struct btrfs_key *key, int lowest_level, 2749 u64 min_trans); 2750 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2751 struct btrfs_path *path, 2752 u64 min_trans); 2753 enum btrfs_compare_tree_result { 2754 BTRFS_COMPARE_TREE_NEW, 2755 BTRFS_COMPARE_TREE_DELETED, 2756 BTRFS_COMPARE_TREE_CHANGED, 2757 BTRFS_COMPARE_TREE_SAME, 2758 }; 2759 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, 2760 struct btrfs_root *right_root, 2761 struct btrfs_path *left_path, 2762 struct btrfs_path *right_path, 2763 struct btrfs_key *key, 2764 enum btrfs_compare_tree_result result, 2765 void *ctx); 2766 int btrfs_compare_trees(struct btrfs_root *left_root, 2767 struct btrfs_root *right_root, 2768 btrfs_changed_cb_t cb, void *ctx); 2769 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2770 struct btrfs_root *root, struct extent_buffer *buf, 2771 struct extent_buffer *parent, int parent_slot, 2772 struct extent_buffer **cow_ret); 2773 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2774 struct btrfs_root *root, 2775 struct extent_buffer *buf, 2776 struct extent_buffer **cow_ret, u64 new_root_objectid); 2777 int btrfs_block_can_be_shared(struct btrfs_root *root, 2778 struct extent_buffer *buf); 2779 void btrfs_extend_item(struct btrfs_root *root, struct btrfs_path *path, 2780 u32 data_size); 2781 void btrfs_truncate_item(struct btrfs_root *root, struct btrfs_path *path, 2782 u32 new_size, int from_end); 2783 int btrfs_split_item(struct btrfs_trans_handle *trans, 2784 struct btrfs_root *root, 2785 struct btrfs_path *path, 2786 struct btrfs_key *new_key, 2787 unsigned long split_offset); 2788 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2789 struct btrfs_root *root, 2790 struct btrfs_path *path, 2791 struct btrfs_key *new_key); 2792 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2793 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2794 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root 2795 *root, struct btrfs_key *key, struct btrfs_path *p, int 2796 ins_len, int cow); 2797 int btrfs_search_old_slot(struct btrfs_root *root, struct btrfs_key *key, 2798 struct btrfs_path *p, u64 time_seq); 2799 int btrfs_search_slot_for_read(struct btrfs_root *root, 2800 struct btrfs_key *key, struct btrfs_path *p, 2801 int find_higher, int return_any); 2802 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2803 struct btrfs_root *root, struct extent_buffer *parent, 2804 int start_slot, u64 *last_ret, 2805 struct btrfs_key *progress); 2806 void btrfs_release_path(struct btrfs_path *p); 2807 struct btrfs_path *btrfs_alloc_path(void); 2808 void btrfs_free_path(struct btrfs_path *p); 2809 void btrfs_set_path_blocking(struct btrfs_path *p); 2810 void btrfs_clear_path_blocking(struct btrfs_path *p, 2811 struct extent_buffer *held, int held_rw); 2812 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2813 2814 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2815 struct btrfs_path *path, int slot, int nr); 2816 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2817 struct btrfs_root *root, 2818 struct btrfs_path *path) 2819 { 2820 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2821 } 2822 2823 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2824 struct btrfs_key *cpu_key, u32 *data_size, 2825 u32 total_data, u32 total_size, int nr); 2826 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root 2827 *root, struct btrfs_key *key, void *data, u32 data_size); 2828 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2829 struct btrfs_root *root, 2830 struct btrfs_path *path, 2831 struct btrfs_key *cpu_key, u32 *data_size, int nr); 2832 2833 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2834 struct btrfs_root *root, 2835 struct btrfs_path *path, 2836 struct btrfs_key *key, 2837 u32 data_size) 2838 { 2839 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2840 } 2841 2842 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2843 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2844 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2845 u64 time_seq); 2846 static inline int btrfs_next_old_item(struct btrfs_root *root, 2847 struct btrfs_path *p, u64 time_seq) 2848 { 2849 ++p->slots[0]; 2850 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2851 return btrfs_next_old_leaf(root, p, time_seq); 2852 return 0; 2853 } 2854 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2855 { 2856 return btrfs_next_old_item(root, p, 0); 2857 } 2858 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); 2859 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2860 struct btrfs_block_rsv *block_rsv, 2861 int update_ref, int for_reloc); 2862 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2863 struct btrfs_root *root, 2864 struct extent_buffer *node, 2865 struct extent_buffer *parent); 2866 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2867 { 2868 /* 2869 * Get synced with close_ctree() 2870 */ 2871 smp_mb(); 2872 return fs_info->closing; 2873 } 2874 2875 /* 2876 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2877 * anything except sleeping. This function is used to check the status of 2878 * the fs. 2879 */ 2880 static inline int btrfs_need_cleaner_sleep(struct btrfs_root *root) 2881 { 2882 return (root->fs_info->sb->s_flags & MS_RDONLY || 2883 btrfs_fs_closing(root->fs_info)); 2884 } 2885 2886 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2887 { 2888 kfree(fs_info->balance_ctl); 2889 kfree(fs_info->delayed_root); 2890 kfree(fs_info->extent_root); 2891 kfree(fs_info->tree_root); 2892 kfree(fs_info->chunk_root); 2893 kfree(fs_info->dev_root); 2894 kfree(fs_info->csum_root); 2895 kfree(fs_info->quota_root); 2896 kfree(fs_info->uuid_root); 2897 kfree(fs_info->free_space_root); 2898 kfree(fs_info->super_copy); 2899 kfree(fs_info->super_for_commit); 2900 security_free_mnt_opts(&fs_info->security_opts); 2901 kfree(fs_info); 2902 } 2903 2904 /* tree mod log functions from ctree.c */ 2905 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2906 struct seq_list *elem); 2907 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2908 struct seq_list *elem); 2909 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2910 2911 /* root-item.c */ 2912 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2913 struct btrfs_root *tree_root, 2914 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2915 const char *name, int name_len); 2916 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2917 struct btrfs_root *tree_root, 2918 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2919 const char *name, int name_len); 2920 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2921 struct btrfs_key *key); 2922 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root 2923 *root, struct btrfs_key *key, struct btrfs_root_item 2924 *item); 2925 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2926 struct btrfs_root *root, 2927 struct btrfs_key *key, 2928 struct btrfs_root_item *item); 2929 int btrfs_find_root(struct btrfs_root *root, struct btrfs_key *search_key, 2930 struct btrfs_path *path, struct btrfs_root_item *root_item, 2931 struct btrfs_key *root_key); 2932 int btrfs_find_orphan_roots(struct btrfs_root *tree_root); 2933 void btrfs_set_root_node(struct btrfs_root_item *item, 2934 struct extent_buffer *node); 2935 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2936 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2937 struct btrfs_root *root); 2938 2939 /* uuid-tree.c */ 2940 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 2941 struct btrfs_root *uuid_root, u8 *uuid, u8 type, 2942 u64 subid); 2943 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 2944 struct btrfs_root *uuid_root, u8 *uuid, u8 type, 2945 u64 subid); 2946 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2947 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2948 u64)); 2949 2950 /* dir-item.c */ 2951 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2952 const char *name, int name_len); 2953 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 2954 struct btrfs_root *root, const char *name, 2955 int name_len, struct inode *dir, 2956 struct btrfs_key *location, u8 type, u64 index); 2957 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2958 struct btrfs_root *root, 2959 struct btrfs_path *path, u64 dir, 2960 const char *name, int name_len, 2961 int mod); 2962 struct btrfs_dir_item * 2963 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2964 struct btrfs_root *root, 2965 struct btrfs_path *path, u64 dir, 2966 u64 objectid, const char *name, int name_len, 2967 int mod); 2968 struct btrfs_dir_item * 2969 btrfs_search_dir_index_item(struct btrfs_root *root, 2970 struct btrfs_path *path, u64 dirid, 2971 const char *name, int name_len); 2972 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2973 struct btrfs_root *root, 2974 struct btrfs_path *path, 2975 struct btrfs_dir_item *di); 2976 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2977 struct btrfs_root *root, 2978 struct btrfs_path *path, u64 objectid, 2979 const char *name, u16 name_len, 2980 const void *data, u16 data_len); 2981 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2982 struct btrfs_root *root, 2983 struct btrfs_path *path, u64 dir, 2984 const char *name, u16 name_len, 2985 int mod); 2986 int verify_dir_item(struct btrfs_root *root, 2987 struct extent_buffer *leaf, 2988 struct btrfs_dir_item *dir_item); 2989 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, 2990 struct btrfs_path *path, 2991 const char *name, 2992 int name_len); 2993 2994 /* orphan.c */ 2995 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2996 struct btrfs_root *root, u64 offset); 2997 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2998 struct btrfs_root *root, u64 offset); 2999 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3000 3001 /* inode-item.c */ 3002 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3003 struct btrfs_root *root, 3004 const char *name, int name_len, 3005 u64 inode_objectid, u64 ref_objectid, u64 index); 3006 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3007 struct btrfs_root *root, 3008 const char *name, int name_len, 3009 u64 inode_objectid, u64 ref_objectid, u64 *index); 3010 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3011 struct btrfs_root *root, 3012 struct btrfs_path *path, u64 objectid); 3013 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3014 *root, struct btrfs_path *path, 3015 struct btrfs_key *location, int mod); 3016 3017 struct btrfs_inode_extref * 3018 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3019 struct btrfs_root *root, 3020 struct btrfs_path *path, 3021 const char *name, int name_len, 3022 u64 inode_objectid, u64 ref_objectid, int ins_len, 3023 int cow); 3024 3025 int btrfs_find_name_in_ext_backref(struct btrfs_path *path, 3026 u64 ref_objectid, const char *name, 3027 int name_len, 3028 struct btrfs_inode_extref **extref_ret); 3029 3030 /* file-item.c */ 3031 struct btrfs_dio_private; 3032 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3033 struct btrfs_root *root, u64 bytenr, u64 len); 3034 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, 3035 struct bio *bio, u32 *dst); 3036 int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, 3037 struct bio *bio, u64 logical_offset); 3038 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3039 struct btrfs_root *root, 3040 u64 objectid, u64 pos, 3041 u64 disk_offset, u64 disk_num_bytes, 3042 u64 num_bytes, u64 offset, u64 ram_bytes, 3043 u8 compression, u8 encryption, u16 other_encoding); 3044 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3045 struct btrfs_root *root, 3046 struct btrfs_path *path, u64 objectid, 3047 u64 bytenr, int mod); 3048 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3049 struct btrfs_root *root, 3050 struct btrfs_ordered_sum *sums); 3051 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, 3052 struct bio *bio, u64 file_start, int contig); 3053 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3054 struct list_head *list, int search_commit); 3055 void btrfs_extent_item_to_extent_map(struct inode *inode, 3056 const struct btrfs_path *path, 3057 struct btrfs_file_extent_item *fi, 3058 const bool new_inline, 3059 struct extent_map *em); 3060 3061 /* inode.c */ 3062 struct btrfs_delalloc_work { 3063 struct inode *inode; 3064 int delay_iput; 3065 struct completion completion; 3066 struct list_head list; 3067 struct btrfs_work work; 3068 }; 3069 3070 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3071 int delay_iput); 3072 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3073 3074 struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page, 3075 size_t pg_offset, u64 start, u64 len, 3076 int create); 3077 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3078 u64 *orig_start, u64 *orig_block_len, 3079 u64 *ram_bytes); 3080 3081 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ 3082 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) 3083 #define ClearPageChecked ClearPageFsMisc 3084 #define SetPageChecked SetPageFsMisc 3085 #define PageChecked PageFsMisc 3086 #endif 3087 3088 /* This forces readahead on a given range of bytes in an inode */ 3089 static inline void btrfs_force_ra(struct address_space *mapping, 3090 struct file_ra_state *ra, struct file *file, 3091 pgoff_t offset, unsigned long req_size) 3092 { 3093 page_cache_sync_readahead(mapping, ra, file, offset, req_size); 3094 } 3095 3096 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3097 int btrfs_set_inode_index(struct inode *dir, u64 *index); 3098 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3099 struct btrfs_root *root, 3100 struct inode *dir, struct inode *inode, 3101 const char *name, int name_len); 3102 int btrfs_add_link(struct btrfs_trans_handle *trans, 3103 struct inode *parent_inode, struct inode *inode, 3104 const char *name, int name_len, int add_backref, u64 index); 3105 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3106 struct btrfs_root *root, 3107 struct inode *dir, u64 objectid, 3108 const char *name, int name_len); 3109 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3110 int front); 3111 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3112 struct btrfs_root *root, 3113 struct inode *inode, u64 new_size, 3114 u32 min_type); 3115 3116 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3117 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3118 int nr); 3119 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3120 struct extent_state **cached_state); 3121 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3122 struct btrfs_root *new_root, 3123 struct btrfs_root *parent_root, 3124 u64 new_dirid); 3125 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3126 size_t size, struct bio *bio, 3127 unsigned long bio_flags); 3128 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); 3129 int btrfs_readpage(struct file *file, struct page *page); 3130 void btrfs_evict_inode(struct inode *inode); 3131 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3132 struct inode *btrfs_alloc_inode(struct super_block *sb); 3133 void btrfs_destroy_inode(struct inode *inode); 3134 int btrfs_drop_inode(struct inode *inode); 3135 int btrfs_init_cachep(void); 3136 void btrfs_destroy_cachep(void); 3137 long btrfs_ioctl_trans_end(struct file *file); 3138 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3139 struct btrfs_root *root, int *was_new); 3140 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, 3141 size_t pg_offset, u64 start, u64 end, 3142 int create); 3143 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3144 struct btrfs_root *root, 3145 struct inode *inode); 3146 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3147 struct btrfs_root *root, struct inode *inode); 3148 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); 3149 int btrfs_orphan_cleanup(struct btrfs_root *root); 3150 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3151 struct btrfs_root *root); 3152 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3153 void btrfs_invalidate_inodes(struct btrfs_root *root); 3154 void btrfs_add_delayed_iput(struct inode *inode); 3155 void btrfs_run_delayed_iputs(struct btrfs_root *root); 3156 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3157 u64 start, u64 num_bytes, u64 min_size, 3158 loff_t actual_len, u64 *alloc_hint); 3159 int btrfs_prealloc_file_range_trans(struct inode *inode, 3160 struct btrfs_trans_handle *trans, int mode, 3161 u64 start, u64 num_bytes, u64 min_size, 3162 loff_t actual_len, u64 *alloc_hint); 3163 int btrfs_inode_check_errors(struct inode *inode); 3164 extern const struct dentry_operations btrfs_dentry_operations; 3165 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3166 void btrfs_test_inode_set_ops(struct inode *inode); 3167 #endif 3168 3169 /* ioctl.c */ 3170 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3171 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3172 int btrfs_ioctl_get_supported_features(void __user *arg); 3173 void btrfs_update_iflags(struct inode *inode); 3174 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); 3175 int btrfs_is_empty_uuid(u8 *uuid); 3176 int btrfs_defrag_file(struct inode *inode, struct file *file, 3177 struct btrfs_ioctl_defrag_range_args *range, 3178 u64 newer_than, unsigned long max_pages); 3179 void btrfs_get_block_group_info(struct list_head *groups_list, 3180 struct btrfs_ioctl_space_info *space); 3181 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3182 struct btrfs_ioctl_balance_args *bargs); 3183 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3184 struct file *dst_file, u64 dst_loff); 3185 3186 /* file.c */ 3187 int btrfs_auto_defrag_init(void); 3188 void btrfs_auto_defrag_exit(void); 3189 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3190 struct inode *inode); 3191 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3192 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3193 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3194 void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, 3195 int skip_pinned); 3196 extern const struct file_operations btrfs_file_operations; 3197 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3198 struct btrfs_root *root, struct inode *inode, 3199 struct btrfs_path *path, u64 start, u64 end, 3200 u64 *drop_end, int drop_cache, 3201 int replace_extent, 3202 u32 extent_item_size, 3203 int *key_inserted); 3204 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3205 struct btrfs_root *root, struct inode *inode, u64 start, 3206 u64 end, int drop_cache); 3207 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3208 struct inode *inode, u64 start, u64 end); 3209 int btrfs_release_file(struct inode *inode, struct file *file); 3210 int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode, 3211 struct page **pages, size_t num_pages, 3212 loff_t pos, size_t write_bytes, 3213 struct extent_state **cached); 3214 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3215 ssize_t btrfs_copy_file_range(struct file *file_in, loff_t pos_in, 3216 struct file *file_out, loff_t pos_out, 3217 size_t len, unsigned int flags); 3218 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3219 struct file *file_out, loff_t pos_out, u64 len); 3220 3221 /* tree-defrag.c */ 3222 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3223 struct btrfs_root *root); 3224 3225 /* sysfs.c */ 3226 int btrfs_init_sysfs(void); 3227 void btrfs_exit_sysfs(void); 3228 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3229 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3230 3231 /* xattr.c */ 3232 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 3233 3234 /* super.c */ 3235 int btrfs_parse_options(struct btrfs_root *root, char *options, 3236 unsigned long new_flags); 3237 int btrfs_sync_fs(struct super_block *sb, int wait); 3238 3239 #ifdef CONFIG_PRINTK 3240 __printf(2, 3) 3241 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3242 #else 3243 static inline __printf(2, 3) 3244 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3245 { 3246 } 3247 #endif 3248 3249 #define btrfs_emerg(fs_info, fmt, args...) \ 3250 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3251 #define btrfs_alert(fs_info, fmt, args...) \ 3252 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3253 #define btrfs_crit(fs_info, fmt, args...) \ 3254 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3255 #define btrfs_err(fs_info, fmt, args...) \ 3256 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3257 #define btrfs_warn(fs_info, fmt, args...) \ 3258 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3259 #define btrfs_notice(fs_info, fmt, args...) \ 3260 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3261 #define btrfs_info(fs_info, fmt, args...) \ 3262 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3263 3264 /* 3265 * Wrappers that use printk_in_rcu 3266 */ 3267 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3268 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3269 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3270 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3271 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3272 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3273 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3274 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3275 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3276 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3277 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3278 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3279 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3280 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3281 3282 /* 3283 * Wrappers that use a ratelimited printk_in_rcu 3284 */ 3285 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3286 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3287 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3288 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3289 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3290 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3291 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3292 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3293 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3294 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3295 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3296 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3297 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3298 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3299 3300 /* 3301 * Wrappers that use a ratelimited printk 3302 */ 3303 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3304 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3305 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3306 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3307 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3308 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3309 #define btrfs_err_rl(fs_info, fmt, args...) \ 3310 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3311 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3312 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3313 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3314 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3315 #define btrfs_info_rl(fs_info, fmt, args...) \ 3316 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3317 #ifdef DEBUG 3318 #define btrfs_debug(fs_info, fmt, args...) \ 3319 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3320 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3321 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3322 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3323 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3324 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3325 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3326 #else 3327 #define btrfs_debug(fs_info, fmt, args...) \ 3328 no_printk(KERN_DEBUG fmt, ##args) 3329 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3330 no_printk(KERN_DEBUG fmt, ##args) 3331 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3332 no_printk(KERN_DEBUG fmt, ##args) 3333 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3334 no_printk(KERN_DEBUG fmt, ##args) 3335 #endif 3336 3337 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3338 do { \ 3339 rcu_read_lock(); \ 3340 btrfs_printk(fs_info, fmt, ##args); \ 3341 rcu_read_unlock(); \ 3342 } while (0) 3343 3344 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3345 do { \ 3346 static DEFINE_RATELIMIT_STATE(_rs, \ 3347 DEFAULT_RATELIMIT_INTERVAL, \ 3348 DEFAULT_RATELIMIT_BURST); \ 3349 if (__ratelimit(&_rs)) \ 3350 btrfs_printk(fs_info, fmt, ##args); \ 3351 } while (0) 3352 3353 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3354 do { \ 3355 rcu_read_lock(); \ 3356 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3357 rcu_read_unlock(); \ 3358 } while (0) 3359 3360 #ifdef CONFIG_BTRFS_ASSERT 3361 3362 __cold 3363 static inline void assfail(char *expr, char *file, int line) 3364 { 3365 pr_err("BTRFS: assertion failed: %s, file: %s, line: %d", 3366 expr, file, line); 3367 BUG(); 3368 } 3369 3370 #define ASSERT(expr) \ 3371 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3372 #else 3373 #define ASSERT(expr) ((void)0) 3374 #endif 3375 3376 __printf(5, 6) 3377 __cold 3378 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3379 unsigned int line, int errno, const char *fmt, ...); 3380 3381 const char *btrfs_decode_error(int errno); 3382 3383 __cold 3384 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3385 const char *function, 3386 unsigned int line, int errno); 3387 3388 /* 3389 * Call btrfs_abort_transaction as early as possible when an error condition is 3390 * detected, that way the exact line number is reported. 3391 */ 3392 #define btrfs_abort_transaction(trans, errno) \ 3393 do { \ 3394 /* Report first abort since mount */ \ 3395 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3396 &((trans)->fs_info->fs_state))) { \ 3397 WARN(1, KERN_DEBUG \ 3398 "BTRFS: Transaction aborted (error %d)\n", \ 3399 (errno)); \ 3400 } \ 3401 __btrfs_abort_transaction((trans), __func__, \ 3402 __LINE__, (errno)); \ 3403 } while (0) 3404 3405 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3406 do { \ 3407 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3408 (errno), fmt, ##args); \ 3409 } while (0) 3410 3411 __printf(5, 6) 3412 __cold 3413 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3414 unsigned int line, int errno, const char *fmt, ...); 3415 /* 3416 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3417 * will panic(). Otherwise we BUG() here. 3418 */ 3419 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3420 do { \ 3421 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3422 BUG(); \ 3423 } while (0) 3424 3425 3426 /* compatibility and incompatibility defines */ 3427 3428 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3429 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3430 3431 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3432 u64 flag) 3433 { 3434 struct btrfs_super_block *disk_super; 3435 u64 features; 3436 3437 disk_super = fs_info->super_copy; 3438 features = btrfs_super_incompat_flags(disk_super); 3439 if (!(features & flag)) { 3440 spin_lock(&fs_info->super_lock); 3441 features = btrfs_super_incompat_flags(disk_super); 3442 if (!(features & flag)) { 3443 features |= flag; 3444 btrfs_set_super_incompat_flags(disk_super, features); 3445 btrfs_info(fs_info, "setting %llu feature flag", 3446 flag); 3447 } 3448 spin_unlock(&fs_info->super_lock); 3449 } 3450 } 3451 3452 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3453 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3454 3455 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3456 u64 flag) 3457 { 3458 struct btrfs_super_block *disk_super; 3459 u64 features; 3460 3461 disk_super = fs_info->super_copy; 3462 features = btrfs_super_incompat_flags(disk_super); 3463 if (features & flag) { 3464 spin_lock(&fs_info->super_lock); 3465 features = btrfs_super_incompat_flags(disk_super); 3466 if (features & flag) { 3467 features &= ~flag; 3468 btrfs_set_super_incompat_flags(disk_super, features); 3469 btrfs_info(fs_info, "clearing %llu feature flag", 3470 flag); 3471 } 3472 spin_unlock(&fs_info->super_lock); 3473 } 3474 } 3475 3476 #define btrfs_fs_incompat(fs_info, opt) \ 3477 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3478 3479 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3480 { 3481 struct btrfs_super_block *disk_super; 3482 disk_super = fs_info->super_copy; 3483 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3484 } 3485 3486 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3487 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3488 3489 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3490 u64 flag) 3491 { 3492 struct btrfs_super_block *disk_super; 3493 u64 features; 3494 3495 disk_super = fs_info->super_copy; 3496 features = btrfs_super_compat_ro_flags(disk_super); 3497 if (!(features & flag)) { 3498 spin_lock(&fs_info->super_lock); 3499 features = btrfs_super_compat_ro_flags(disk_super); 3500 if (!(features & flag)) { 3501 features |= flag; 3502 btrfs_set_super_compat_ro_flags(disk_super, features); 3503 btrfs_info(fs_info, "setting %llu ro feature flag", 3504 flag); 3505 } 3506 spin_unlock(&fs_info->super_lock); 3507 } 3508 } 3509 3510 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3511 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3512 3513 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3514 u64 flag) 3515 { 3516 struct btrfs_super_block *disk_super; 3517 u64 features; 3518 3519 disk_super = fs_info->super_copy; 3520 features = btrfs_super_compat_ro_flags(disk_super); 3521 if (features & flag) { 3522 spin_lock(&fs_info->super_lock); 3523 features = btrfs_super_compat_ro_flags(disk_super); 3524 if (features & flag) { 3525 features &= ~flag; 3526 btrfs_set_super_compat_ro_flags(disk_super, features); 3527 btrfs_info(fs_info, "clearing %llu ro feature flag", 3528 flag); 3529 } 3530 spin_unlock(&fs_info->super_lock); 3531 } 3532 } 3533 3534 #define btrfs_fs_compat_ro(fs_info, opt) \ 3535 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3536 3537 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3538 { 3539 struct btrfs_super_block *disk_super; 3540 disk_super = fs_info->super_copy; 3541 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3542 } 3543 3544 /* acl.c */ 3545 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3546 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3547 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3548 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3549 struct inode *inode, struct inode *dir); 3550 #else 3551 #define btrfs_get_acl NULL 3552 #define btrfs_set_acl NULL 3553 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3554 struct inode *inode, struct inode *dir) 3555 { 3556 return 0; 3557 } 3558 #endif 3559 3560 /* relocation.c */ 3561 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); 3562 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3563 struct btrfs_root *root); 3564 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3565 struct btrfs_root *root); 3566 int btrfs_recover_relocation(struct btrfs_root *root); 3567 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3568 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3569 struct btrfs_root *root, struct extent_buffer *buf, 3570 struct extent_buffer *cow); 3571 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3572 u64 *bytes_to_reserve); 3573 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3574 struct btrfs_pending_snapshot *pending); 3575 3576 /* scrub.c */ 3577 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3578 u64 end, struct btrfs_scrub_progress *progress, 3579 int readonly, int is_dev_replace); 3580 void btrfs_scrub_pause(struct btrfs_root *root); 3581 void btrfs_scrub_continue(struct btrfs_root *root); 3582 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3583 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3584 struct btrfs_device *dev); 3585 int btrfs_scrub_progress(struct btrfs_root *root, u64 devid, 3586 struct btrfs_scrub_progress *progress); 3587 3588 /* dev-replace.c */ 3589 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3590 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3591 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3592 3593 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3594 { 3595 btrfs_bio_counter_sub(fs_info, 1); 3596 } 3597 3598 /* reada.c */ 3599 struct reada_control { 3600 struct btrfs_root *root; /* tree to prefetch */ 3601 struct btrfs_key key_start; 3602 struct btrfs_key key_end; /* exclusive */ 3603 atomic_t elems; 3604 struct kref refcnt; 3605 wait_queue_head_t wait; 3606 }; 3607 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3608 struct btrfs_key *start, struct btrfs_key *end); 3609 int btrfs_reada_wait(void *handle); 3610 void btrfs_reada_detach(void *handle); 3611 int btree_readahead_hook(struct btrfs_fs_info *fs_info, 3612 struct extent_buffer *eb, u64 start, int err); 3613 3614 static inline int is_fstree(u64 rootid) 3615 { 3616 if (rootid == BTRFS_FS_TREE_OBJECTID || 3617 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3618 !btrfs_qgroup_level(rootid))) 3619 return 1; 3620 return 0; 3621 } 3622 3623 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3624 { 3625 return signal_pending(current); 3626 } 3627 3628 /* Sanity test specific functions */ 3629 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3630 void btrfs_test_destroy_inode(struct inode *inode); 3631 #endif 3632 3633 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3634 { 3635 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3636 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3637 &fs_info->fs_state))) 3638 return 1; 3639 #endif 3640 return 0; 3641 } 3642 #endif 3643