1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <linux/kobject.h> 20 #include <trace/events/btrfs.h> 21 #include <asm/kmap_types.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 35 struct btrfs_trans_handle; 36 struct btrfs_transaction; 37 struct btrfs_pending_snapshot; 38 extern struct kmem_cache *btrfs_trans_handle_cachep; 39 extern struct kmem_cache *btrfs_bit_radix_cachep; 40 extern struct kmem_cache *btrfs_path_cachep; 41 extern struct kmem_cache *btrfs_free_space_cachep; 42 struct btrfs_ordered_sum; 43 44 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 45 46 #define BTRFS_MAX_MIRRORS 3 47 48 #define BTRFS_MAX_LEVEL 8 49 50 #define BTRFS_OLDEST_GENERATION 0ULL 51 52 /* 53 * the max metadata block size. This limit is somewhat artificial, 54 * but the memmove costs go through the roof for larger blocks. 55 */ 56 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 57 58 /* 59 * we can actually store much bigger names, but lets not confuse the rest 60 * of linux 61 */ 62 #define BTRFS_NAME_LEN 255 63 64 /* 65 * Theoretical limit is larger, but we keep this down to a sane 66 * value. That should limit greatly the possibility of collisions on 67 * inode ref items. 68 */ 69 #define BTRFS_LINK_MAX 65535U 70 71 /* four bytes for CRC32 */ 72 static const int btrfs_csum_sizes[] = { 4 }; 73 74 #define BTRFS_EMPTY_DIR_SIZE 0 75 76 /* ioprio of readahead is set to idle */ 77 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 78 79 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 80 81 /* 82 * Use large batch size to reduce overhead of metadata updates. On the reader 83 * side, we only read it when we are close to ENOSPC and the read overhead is 84 * mostly related to the number of CPUs, so it is OK to use arbitrary large 85 * value here. 86 */ 87 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 88 89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 90 91 92 /* 93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 94 */ 95 static inline u32 count_max_extents(u64 size) 96 { 97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 98 } 99 100 struct btrfs_mapping_tree { 101 struct extent_map_tree map_tree; 102 }; 103 104 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 105 { 106 BUG_ON(num_stripes == 0); 107 return sizeof(struct btrfs_chunk) + 108 sizeof(struct btrfs_stripe) * (num_stripes - 1); 109 } 110 111 /* 112 * File system states 113 */ 114 #define BTRFS_FS_STATE_ERROR 0 115 #define BTRFS_FS_STATE_REMOUNTING 1 116 #define BTRFS_FS_STATE_TRANS_ABORTED 2 117 #define BTRFS_FS_STATE_DEV_REPLACING 3 118 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 119 120 #define BTRFS_BACKREF_REV_MAX 256 121 #define BTRFS_BACKREF_REV_SHIFT 56 122 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 123 BTRFS_BACKREF_REV_SHIFT) 124 125 #define BTRFS_OLD_BACKREF_REV 0 126 #define BTRFS_MIXED_BACKREF_REV 1 127 128 /* 129 * every tree block (leaf or node) starts with this header. 130 */ 131 struct btrfs_header { 132 /* these first four must match the super block */ 133 u8 csum[BTRFS_CSUM_SIZE]; 134 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 135 __le64 bytenr; /* which block this node is supposed to live in */ 136 __le64 flags; 137 138 /* allowed to be different from the super from here on down */ 139 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 140 __le64 generation; 141 __le64 owner; 142 __le32 nritems; 143 u8 level; 144 } __attribute__ ((__packed__)); 145 146 /* 147 * this is a very generous portion of the super block, giving us 148 * room to translate 14 chunks with 3 stripes each. 149 */ 150 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 151 152 /* 153 * just in case we somehow lose the roots and are not able to mount, 154 * we store an array of the roots from previous transactions 155 * in the super. 156 */ 157 #define BTRFS_NUM_BACKUP_ROOTS 4 158 struct btrfs_root_backup { 159 __le64 tree_root; 160 __le64 tree_root_gen; 161 162 __le64 chunk_root; 163 __le64 chunk_root_gen; 164 165 __le64 extent_root; 166 __le64 extent_root_gen; 167 168 __le64 fs_root; 169 __le64 fs_root_gen; 170 171 __le64 dev_root; 172 __le64 dev_root_gen; 173 174 __le64 csum_root; 175 __le64 csum_root_gen; 176 177 __le64 total_bytes; 178 __le64 bytes_used; 179 __le64 num_devices; 180 /* future */ 181 __le64 unused_64[4]; 182 183 u8 tree_root_level; 184 u8 chunk_root_level; 185 u8 extent_root_level; 186 u8 fs_root_level; 187 u8 dev_root_level; 188 u8 csum_root_level; 189 /* future and to align */ 190 u8 unused_8[10]; 191 } __attribute__ ((__packed__)); 192 193 /* 194 * the super block basically lists the main trees of the FS 195 * it currently lacks any block count etc etc 196 */ 197 struct btrfs_super_block { 198 u8 csum[BTRFS_CSUM_SIZE]; 199 /* the first 4 fields must match struct btrfs_header */ 200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 201 __le64 bytenr; /* this block number */ 202 __le64 flags; 203 204 /* allowed to be different from the btrfs_header from here own down */ 205 __le64 magic; 206 __le64 generation; 207 __le64 root; 208 __le64 chunk_root; 209 __le64 log_root; 210 211 /* this will help find the new super based on the log root */ 212 __le64 log_root_transid; 213 __le64 total_bytes; 214 __le64 bytes_used; 215 __le64 root_dir_objectid; 216 __le64 num_devices; 217 __le32 sectorsize; 218 __le32 nodesize; 219 __le32 __unused_leafsize; 220 __le32 stripesize; 221 __le32 sys_chunk_array_size; 222 __le64 chunk_root_generation; 223 __le64 compat_flags; 224 __le64 compat_ro_flags; 225 __le64 incompat_flags; 226 __le16 csum_type; 227 u8 root_level; 228 u8 chunk_root_level; 229 u8 log_root_level; 230 struct btrfs_dev_item dev_item; 231 232 char label[BTRFS_LABEL_SIZE]; 233 234 __le64 cache_generation; 235 __le64 uuid_tree_generation; 236 237 /* future expansion */ 238 __le64 reserved[30]; 239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 240 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 241 } __attribute__ ((__packed__)); 242 243 /* 244 * Compat flags that we support. If any incompat flags are set other than the 245 * ones specified below then we will fail to mount 246 */ 247 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 248 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 249 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 250 251 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 252 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 253 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 254 255 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 257 258 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 259 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 260 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 261 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 262 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 263 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 264 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 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->fs_info) >> 4) - \ 342 sizeof(struct btrfs_item)) 343 struct btrfs_dev_replace { 344 u64 replace_state; /* see #define above */ 345 time64_t time_started; /* seconds since 1-Jan-1970 */ 346 time64_t 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 struct mutex lock_finishing_cancel_unmount; 363 rwlock_t lock; 364 atomic_t blocking_readers; 365 wait_queue_head_t read_lock_wq; 366 367 struct btrfs_scrub_progress scrub_progress; 368 369 struct percpu_counter bio_counter; 370 wait_queue_head_t replace_wait; 371 }; 372 373 /* For raid type sysfs entries */ 374 struct raid_kobject { 375 u64 flags; 376 struct kobject kobj; 377 struct list_head list; 378 }; 379 380 struct btrfs_space_info { 381 spinlock_t lock; 382 383 u64 total_bytes; /* total bytes in the space, 384 this doesn't take mirrors into account */ 385 u64 bytes_used; /* total bytes used, 386 this doesn't take mirrors into account */ 387 u64 bytes_pinned; /* total bytes pinned, will be freed when the 388 transaction finishes */ 389 u64 bytes_reserved; /* total bytes the allocator has reserved for 390 current allocations */ 391 u64 bytes_may_use; /* number of bytes that may be used for 392 delalloc/allocations */ 393 u64 bytes_readonly; /* total bytes that are read only */ 394 395 u64 max_extent_size; /* This will hold the maximum extent size of 396 the space info if we had an ENOSPC in the 397 allocator. */ 398 399 unsigned int full:1; /* indicates that we cannot allocate any more 400 chunks for this space */ 401 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 402 403 unsigned int flush:1; /* set if we are trying to make space */ 404 405 unsigned int force_alloc; /* set if we need to force a chunk 406 alloc for this space */ 407 408 u64 disk_used; /* total bytes used on disk */ 409 u64 disk_total; /* total bytes on disk, takes mirrors into 410 account */ 411 412 u64 flags; 413 414 /* 415 * bytes_pinned is kept in line with what is actually pinned, as in 416 * we've called update_block_group and dropped the bytes_used counter 417 * and increased the bytes_pinned counter. However this means that 418 * bytes_pinned does not reflect the bytes that will be pinned once the 419 * delayed refs are flushed, so this counter is inc'ed every time we 420 * call btrfs_free_extent so it is a realtime count of what will be 421 * freed once the transaction is committed. It will be zeroed every 422 * time the transaction commits. 423 */ 424 struct percpu_counter total_bytes_pinned; 425 426 struct list_head list; 427 /* Protected by the spinlock 'lock'. */ 428 struct list_head ro_bgs; 429 struct list_head priority_tickets; 430 struct list_head tickets; 431 /* 432 * tickets_id just indicates the next ticket will be handled, so note 433 * it's not stored per ticket. 434 */ 435 u64 tickets_id; 436 437 struct rw_semaphore groups_sem; 438 /* for block groups in our same type */ 439 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 440 wait_queue_head_t wait; 441 442 struct kobject kobj; 443 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 444 }; 445 446 #define BTRFS_BLOCK_RSV_GLOBAL 1 447 #define BTRFS_BLOCK_RSV_DELALLOC 2 448 #define BTRFS_BLOCK_RSV_TRANS 3 449 #define BTRFS_BLOCK_RSV_CHUNK 4 450 #define BTRFS_BLOCK_RSV_DELOPS 5 451 #define BTRFS_BLOCK_RSV_EMPTY 6 452 #define BTRFS_BLOCK_RSV_TEMP 7 453 454 struct btrfs_block_rsv { 455 u64 size; 456 u64 reserved; 457 struct btrfs_space_info *space_info; 458 spinlock_t lock; 459 unsigned short full; 460 unsigned short type; 461 unsigned short failfast; 462 463 /* 464 * Qgroup equivalent for @size @reserved 465 * 466 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 467 * about things like csum size nor how many tree blocks it will need to 468 * reserve. 469 * 470 * Qgroup cares more about net change of the extent usage. 471 * 472 * So for one newly inserted file extent, in worst case it will cause 473 * leaf split and level increase, nodesize for each file extent is 474 * already too much. 475 * 476 * In short, qgroup_size/reserved is the upper limit of possible needed 477 * qgroup metadata reservation. 478 */ 479 u64 qgroup_rsv_size; 480 u64 qgroup_rsv_reserved; 481 }; 482 483 /* 484 * free clusters are used to claim free space in relatively large chunks, 485 * allowing us to do less seeky writes. They are used for all metadata 486 * allocations. In ssd_spread mode they are also used for data allocations. 487 */ 488 struct btrfs_free_cluster { 489 spinlock_t lock; 490 spinlock_t refill_lock; 491 struct rb_root root; 492 493 /* largest extent in this cluster */ 494 u64 max_size; 495 496 /* first extent starting offset */ 497 u64 window_start; 498 499 /* We did a full search and couldn't create a cluster */ 500 bool fragmented; 501 502 struct btrfs_block_group_cache *block_group; 503 /* 504 * when a cluster is allocated from a block group, we put the 505 * cluster onto a list in the block group so that it can 506 * be freed before the block group is freed. 507 */ 508 struct list_head block_group_list; 509 }; 510 511 enum btrfs_caching_type { 512 BTRFS_CACHE_NO = 0, 513 BTRFS_CACHE_STARTED = 1, 514 BTRFS_CACHE_FAST = 2, 515 BTRFS_CACHE_FINISHED = 3, 516 BTRFS_CACHE_ERROR = 4, 517 }; 518 519 enum btrfs_disk_cache_state { 520 BTRFS_DC_WRITTEN = 0, 521 BTRFS_DC_ERROR = 1, 522 BTRFS_DC_CLEAR = 2, 523 BTRFS_DC_SETUP = 3, 524 }; 525 526 struct btrfs_caching_control { 527 struct list_head list; 528 struct mutex mutex; 529 wait_queue_head_t wait; 530 struct btrfs_work work; 531 struct btrfs_block_group_cache *block_group; 532 u64 progress; 533 refcount_t count; 534 }; 535 536 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 537 #define CACHING_CTL_WAKE_UP SZ_2M 538 539 struct btrfs_io_ctl { 540 void *cur, *orig; 541 struct page *page; 542 struct page **pages; 543 struct btrfs_fs_info *fs_info; 544 struct inode *inode; 545 unsigned long size; 546 int index; 547 int num_pages; 548 int entries; 549 int bitmaps; 550 unsigned check_crcs:1; 551 }; 552 553 /* 554 * Tree to record all locked full stripes of a RAID5/6 block group 555 */ 556 struct btrfs_full_stripe_locks_tree { 557 struct rb_root root; 558 struct mutex lock; 559 }; 560 561 struct btrfs_block_group_cache { 562 struct btrfs_key key; 563 struct btrfs_block_group_item item; 564 struct btrfs_fs_info *fs_info; 565 struct inode *inode; 566 spinlock_t lock; 567 u64 pinned; 568 u64 reserved; 569 u64 delalloc_bytes; 570 u64 bytes_super; 571 u64 flags; 572 u64 cache_generation; 573 574 /* 575 * If the free space extent count exceeds this number, convert the block 576 * group to bitmaps. 577 */ 578 u32 bitmap_high_thresh; 579 580 /* 581 * If the free space extent count drops below this number, convert the 582 * block group back to extents. 583 */ 584 u32 bitmap_low_thresh; 585 586 /* 587 * It is just used for the delayed data space allocation because 588 * only the data space allocation and the relative metadata update 589 * can be done cross the transaction. 590 */ 591 struct rw_semaphore data_rwsem; 592 593 /* for raid56, this is a full stripe, without parity */ 594 unsigned long full_stripe_len; 595 596 unsigned int ro; 597 unsigned int iref:1; 598 unsigned int has_caching_ctl:1; 599 unsigned int removed:1; 600 601 int disk_cache_state; 602 603 /* cache tracking stuff */ 604 int cached; 605 struct btrfs_caching_control *caching_ctl; 606 u64 last_byte_to_unpin; 607 608 struct btrfs_space_info *space_info; 609 610 /* free space cache stuff */ 611 struct btrfs_free_space_ctl *free_space_ctl; 612 613 /* block group cache stuff */ 614 struct rb_node cache_node; 615 616 /* for block groups in the same raid type */ 617 struct list_head list; 618 619 /* usage count */ 620 atomic_t count; 621 622 /* List of struct btrfs_free_clusters for this block group. 623 * Today it will only have one thing on it, but that may change 624 */ 625 struct list_head cluster_list; 626 627 /* For delayed block group creation or deletion of empty block groups */ 628 struct list_head bg_list; 629 630 /* For read-only block groups */ 631 struct list_head ro_list; 632 633 atomic_t trimming; 634 635 /* For dirty block groups */ 636 struct list_head dirty_list; 637 struct list_head io_list; 638 639 struct btrfs_io_ctl io_ctl; 640 641 /* 642 * Incremented when doing extent allocations and holding a read lock 643 * on the space_info's groups_sem semaphore. 644 * Decremented when an ordered extent that represents an IO against this 645 * block group's range is created (after it's added to its inode's 646 * root's list of ordered extents) or immediately after the allocation 647 * if it's a metadata extent or fallocate extent (for these cases we 648 * don't create ordered extents). 649 */ 650 atomic_t reservations; 651 652 /* 653 * Incremented while holding the spinlock *lock* by a task checking if 654 * it can perform a nocow write (incremented if the value for the *ro* 655 * field is 0). Decremented by such tasks once they create an ordered 656 * extent or before that if some error happens before reaching that step. 657 * This is to prevent races between block group relocation and nocow 658 * writes through direct IO. 659 */ 660 atomic_t nocow_writers; 661 662 /* Lock for free space tree operations. */ 663 struct mutex free_space_lock; 664 665 /* 666 * Does the block group need to be added to the free space tree? 667 * Protected by free_space_lock. 668 */ 669 int needs_free_space; 670 671 /* Record locked full stripes for RAID5/6 block group */ 672 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 673 }; 674 675 /* delayed seq elem */ 676 struct seq_list { 677 struct list_head list; 678 u64 seq; 679 }; 680 681 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 682 683 #define SEQ_LAST ((u64)-1) 684 685 enum btrfs_orphan_cleanup_state { 686 ORPHAN_CLEANUP_STARTED = 1, 687 ORPHAN_CLEANUP_DONE = 2, 688 }; 689 690 /* used by the raid56 code to lock stripes for read/modify/write */ 691 struct btrfs_stripe_hash { 692 struct list_head hash_list; 693 spinlock_t lock; 694 }; 695 696 /* used by the raid56 code to lock stripes for read/modify/write */ 697 struct btrfs_stripe_hash_table { 698 struct list_head stripe_cache; 699 spinlock_t cache_lock; 700 int cache_size; 701 struct btrfs_stripe_hash table[]; 702 }; 703 704 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 705 706 void btrfs_init_async_reclaim_work(struct work_struct *work); 707 708 /* fs_info */ 709 struct reloc_control; 710 struct btrfs_device; 711 struct btrfs_fs_devices; 712 struct btrfs_balance_control; 713 struct btrfs_delayed_root; 714 715 #define BTRFS_FS_BARRIER 1 716 #define BTRFS_FS_CLOSING_START 2 717 #define BTRFS_FS_CLOSING_DONE 3 718 #define BTRFS_FS_LOG_RECOVERING 4 719 #define BTRFS_FS_OPEN 5 720 #define BTRFS_FS_QUOTA_ENABLED 6 721 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 722 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 723 #define BTRFS_FS_BTREE_ERR 11 724 #define BTRFS_FS_LOG1_ERR 12 725 #define BTRFS_FS_LOG2_ERR 13 726 #define BTRFS_FS_QUOTA_OVERRIDE 14 727 /* Used to record internally whether fs has been frozen */ 728 #define BTRFS_FS_FROZEN 15 729 730 /* 731 * Indicate that a whole-filesystem exclusive operation is running 732 * (device replace, resize, device add/delete, balance) 733 */ 734 #define BTRFS_FS_EXCL_OP 16 735 736 /* 737 * To info transaction_kthread we need an immediate commit so it doesn't 738 * need to wait for commit_interval 739 */ 740 #define BTRFS_FS_NEED_ASYNC_COMMIT 17 741 742 /* 743 * Indicate that balance has been set up from the ioctl and is in the main 744 * phase. The fs_info::balance_ctl is initialized. 745 */ 746 #define BTRFS_FS_BALANCE_RUNNING 18 747 748 struct btrfs_fs_info { 749 u8 fsid[BTRFS_FSID_SIZE]; 750 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 751 unsigned long flags; 752 struct btrfs_root *extent_root; 753 struct btrfs_root *tree_root; 754 struct btrfs_root *chunk_root; 755 struct btrfs_root *dev_root; 756 struct btrfs_root *fs_root; 757 struct btrfs_root *csum_root; 758 struct btrfs_root *quota_root; 759 struct btrfs_root *uuid_root; 760 struct btrfs_root *free_space_root; 761 762 /* the log root tree is a directory of all the other log roots */ 763 struct btrfs_root *log_root_tree; 764 765 spinlock_t fs_roots_radix_lock; 766 struct radix_tree_root fs_roots_radix; 767 768 /* block group cache stuff */ 769 spinlock_t block_group_cache_lock; 770 u64 first_logical_byte; 771 struct rb_root block_group_cache_tree; 772 773 /* keep track of unallocated space */ 774 atomic64_t free_chunk_space; 775 776 struct extent_io_tree freed_extents[2]; 777 struct extent_io_tree *pinned_extents; 778 779 /* logical->physical extent mapping */ 780 struct btrfs_mapping_tree mapping_tree; 781 782 /* 783 * block reservation for extent, checksum, root tree and 784 * delayed dir index item 785 */ 786 struct btrfs_block_rsv global_block_rsv; 787 /* block reservation for metadata operations */ 788 struct btrfs_block_rsv trans_block_rsv; 789 /* block reservation for chunk tree */ 790 struct btrfs_block_rsv chunk_block_rsv; 791 /* block reservation for delayed operations */ 792 struct btrfs_block_rsv delayed_block_rsv; 793 794 struct btrfs_block_rsv empty_block_rsv; 795 796 u64 generation; 797 u64 last_trans_committed; 798 u64 avg_delayed_ref_runtime; 799 800 /* 801 * this is updated to the current trans every time a full commit 802 * is required instead of the faster short fsync log commits 803 */ 804 u64 last_trans_log_full_commit; 805 unsigned long mount_opt; 806 /* 807 * Track requests for actions that need to be done during transaction 808 * commit (like for some mount options). 809 */ 810 unsigned long pending_changes; 811 unsigned long compress_type:4; 812 unsigned int compress_level; 813 u32 commit_interval; 814 /* 815 * It is a suggestive number, the read side is safe even it gets a 816 * wrong number because we will write out the data into a regular 817 * extent. The write side(mount/remount) is under ->s_umount lock, 818 * so it is also safe. 819 */ 820 u64 max_inline; 821 822 struct btrfs_transaction *running_transaction; 823 wait_queue_head_t transaction_throttle; 824 wait_queue_head_t transaction_wait; 825 wait_queue_head_t transaction_blocked_wait; 826 wait_queue_head_t async_submit_wait; 827 828 /* 829 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 830 * when they are updated. 831 * 832 * Because we do not clear the flags for ever, so we needn't use 833 * the lock on the read side. 834 * 835 * We also needn't use the lock when we mount the fs, because 836 * there is no other task which will update the flag. 837 */ 838 spinlock_t super_lock; 839 struct btrfs_super_block *super_copy; 840 struct btrfs_super_block *super_for_commit; 841 struct super_block *sb; 842 struct inode *btree_inode; 843 struct mutex tree_log_mutex; 844 struct mutex transaction_kthread_mutex; 845 struct mutex cleaner_mutex; 846 struct mutex chunk_mutex; 847 848 /* 849 * this is taken to make sure we don't set block groups ro after 850 * the free space cache has been allocated on them 851 */ 852 struct mutex ro_block_group_mutex; 853 854 /* this is used during read/modify/write to make sure 855 * no two ios are trying to mod the same stripe at the same 856 * time 857 */ 858 struct btrfs_stripe_hash_table *stripe_hash_table; 859 860 /* 861 * this protects the ordered operations list only while we are 862 * processing all of the entries on it. This way we make 863 * sure the commit code doesn't find the list temporarily empty 864 * because another function happens to be doing non-waiting preflush 865 * before jumping into the main commit. 866 */ 867 struct mutex ordered_operations_mutex; 868 869 struct rw_semaphore commit_root_sem; 870 871 struct rw_semaphore cleanup_work_sem; 872 873 struct rw_semaphore subvol_sem; 874 struct srcu_struct subvol_srcu; 875 876 spinlock_t trans_lock; 877 /* 878 * the reloc mutex goes with the trans lock, it is taken 879 * during commit to protect us from the relocation code 880 */ 881 struct mutex reloc_mutex; 882 883 struct list_head trans_list; 884 struct list_head dead_roots; 885 struct list_head caching_block_groups; 886 887 spinlock_t delayed_iput_lock; 888 struct list_head delayed_iputs; 889 struct mutex cleaner_delayed_iput_mutex; 890 891 /* this protects tree_mod_seq_list */ 892 spinlock_t tree_mod_seq_lock; 893 atomic64_t tree_mod_seq; 894 struct list_head tree_mod_seq_list; 895 896 /* this protects tree_mod_log */ 897 rwlock_t tree_mod_log_lock; 898 struct rb_root tree_mod_log; 899 900 atomic_t async_delalloc_pages; 901 902 /* 903 * this is used to protect the following list -- ordered_roots. 904 */ 905 spinlock_t ordered_root_lock; 906 907 /* 908 * all fs/file tree roots in which there are data=ordered extents 909 * pending writeback are added into this list. 910 * 911 * these can span multiple transactions and basically include 912 * every dirty data page that isn't from nodatacow 913 */ 914 struct list_head ordered_roots; 915 916 struct mutex delalloc_root_mutex; 917 spinlock_t delalloc_root_lock; 918 /* all fs/file tree roots that have delalloc inodes. */ 919 struct list_head delalloc_roots; 920 921 /* 922 * there is a pool of worker threads for checksumming during writes 923 * and a pool for checksumming after reads. This is because readers 924 * can run with FS locks held, and the writers may be waiting for 925 * those locks. We don't want ordering in the pending list to cause 926 * deadlocks, and so the two are serviced separately. 927 * 928 * A third pool does submit_bio to avoid deadlocking with the other 929 * two 930 */ 931 struct btrfs_workqueue *workers; 932 struct btrfs_workqueue *delalloc_workers; 933 struct btrfs_workqueue *flush_workers; 934 struct btrfs_workqueue *endio_workers; 935 struct btrfs_workqueue *endio_meta_workers; 936 struct btrfs_workqueue *endio_raid56_workers; 937 struct btrfs_workqueue *endio_repair_workers; 938 struct btrfs_workqueue *rmw_workers; 939 struct btrfs_workqueue *endio_meta_write_workers; 940 struct btrfs_workqueue *endio_write_workers; 941 struct btrfs_workqueue *endio_freespace_worker; 942 struct btrfs_workqueue *submit_workers; 943 struct btrfs_workqueue *caching_workers; 944 struct btrfs_workqueue *readahead_workers; 945 946 /* 947 * fixup workers take dirty pages that didn't properly go through 948 * the cow mechanism and make them safe to write. It happens 949 * for the sys_munmap function call path 950 */ 951 struct btrfs_workqueue *fixup_workers; 952 struct btrfs_workqueue *delayed_workers; 953 954 /* the extent workers do delayed refs on the extent allocation tree */ 955 struct btrfs_workqueue *extent_workers; 956 struct task_struct *transaction_kthread; 957 struct task_struct *cleaner_kthread; 958 u32 thread_pool_size; 959 960 struct kobject *space_info_kobj; 961 struct list_head pending_raid_kobjs; 962 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 963 964 u64 total_pinned; 965 966 /* used to keep from writing metadata until there is a nice batch */ 967 struct percpu_counter dirty_metadata_bytes; 968 struct percpu_counter delalloc_bytes; 969 s32 dirty_metadata_batch; 970 s32 delalloc_batch; 971 972 struct list_head dirty_cowonly_roots; 973 974 struct btrfs_fs_devices *fs_devices; 975 976 /* 977 * The space_info list is effectively read only after initial 978 * setup. It is populated at mount time and cleaned up after 979 * all block groups are removed. RCU is used to protect it. 980 */ 981 struct list_head space_info; 982 983 struct btrfs_space_info *data_sinfo; 984 985 struct reloc_control *reloc_ctl; 986 987 /* data_alloc_cluster is only used in ssd_spread mode */ 988 struct btrfs_free_cluster data_alloc_cluster; 989 990 /* all metadata allocations go through this cluster */ 991 struct btrfs_free_cluster meta_alloc_cluster; 992 993 /* auto defrag inodes go here */ 994 spinlock_t defrag_inodes_lock; 995 struct rb_root defrag_inodes; 996 atomic_t defrag_running; 997 998 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 999 seqlock_t profiles_lock; 1000 /* 1001 * these three are in extended format (availability of single 1002 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 1003 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 1004 */ 1005 u64 avail_data_alloc_bits; 1006 u64 avail_metadata_alloc_bits; 1007 u64 avail_system_alloc_bits; 1008 1009 /* restriper state */ 1010 spinlock_t balance_lock; 1011 struct mutex balance_mutex; 1012 atomic_t balance_pause_req; 1013 atomic_t balance_cancel_req; 1014 struct btrfs_balance_control *balance_ctl; 1015 wait_queue_head_t balance_wait_q; 1016 1017 u32 data_chunk_allocations; 1018 u32 metadata_ratio; 1019 1020 void *bdev_holder; 1021 1022 /* private scrub information */ 1023 struct mutex scrub_lock; 1024 atomic_t scrubs_running; 1025 atomic_t scrub_pause_req; 1026 atomic_t scrubs_paused; 1027 atomic_t scrub_cancel_req; 1028 wait_queue_head_t scrub_pause_wait; 1029 int scrub_workers_refcnt; 1030 struct btrfs_workqueue *scrub_workers; 1031 struct btrfs_workqueue *scrub_wr_completion_workers; 1032 struct btrfs_workqueue *scrub_nocow_workers; 1033 struct btrfs_workqueue *scrub_parity_workers; 1034 1035 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1036 u32 check_integrity_print_mask; 1037 #endif 1038 /* is qgroup tracking in a consistent state? */ 1039 u64 qgroup_flags; 1040 1041 /* holds configuration and tracking. Protected by qgroup_lock */ 1042 struct rb_root qgroup_tree; 1043 struct rb_root qgroup_op_tree; 1044 spinlock_t qgroup_lock; 1045 spinlock_t qgroup_op_lock; 1046 atomic_t qgroup_op_seq; 1047 1048 /* 1049 * used to avoid frequently calling ulist_alloc()/ulist_free() 1050 * when doing qgroup accounting, it must be protected by qgroup_lock. 1051 */ 1052 struct ulist *qgroup_ulist; 1053 1054 /* protect user change for quota operations */ 1055 struct mutex qgroup_ioctl_lock; 1056 1057 /* list of dirty qgroups to be written at next commit */ 1058 struct list_head dirty_qgroups; 1059 1060 /* used by qgroup for an efficient tree traversal */ 1061 u64 qgroup_seq; 1062 1063 /* qgroup rescan items */ 1064 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1065 struct btrfs_key qgroup_rescan_progress; 1066 struct btrfs_workqueue *qgroup_rescan_workers; 1067 struct completion qgroup_rescan_completion; 1068 struct btrfs_work qgroup_rescan_work; 1069 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1070 1071 /* filesystem state */ 1072 unsigned long fs_state; 1073 1074 struct btrfs_delayed_root *delayed_root; 1075 1076 /* readahead tree */ 1077 spinlock_t reada_lock; 1078 struct radix_tree_root reada_tree; 1079 1080 /* readahead works cnt */ 1081 atomic_t reada_works_cnt; 1082 1083 /* Extent buffer radix tree */ 1084 spinlock_t buffer_lock; 1085 struct radix_tree_root buffer_radix; 1086 1087 /* next backup root to be overwritten */ 1088 int backup_root_index; 1089 1090 /* device replace state */ 1091 struct btrfs_dev_replace dev_replace; 1092 1093 struct semaphore uuid_tree_rescan_sem; 1094 1095 /* Used to reclaim the metadata space in the background. */ 1096 struct work_struct async_reclaim_work; 1097 1098 spinlock_t unused_bgs_lock; 1099 struct list_head unused_bgs; 1100 struct mutex unused_bg_unpin_mutex; 1101 struct mutex delete_unused_bgs_mutex; 1102 1103 /* For btrfs to record security options */ 1104 struct security_mnt_opts security_opts; 1105 1106 /* 1107 * Chunks that can't be freed yet (under a trim/discard operation) 1108 * and will be latter freed. Protected by fs_info->chunk_mutex. 1109 */ 1110 struct list_head pinned_chunks; 1111 1112 /* Cached block sizes */ 1113 u32 nodesize; 1114 u32 sectorsize; 1115 u32 stripesize; 1116 1117 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1118 spinlock_t ref_verify_lock; 1119 struct rb_root block_tree; 1120 #endif 1121 }; 1122 1123 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1124 { 1125 return sb->s_fs_info; 1126 } 1127 1128 struct btrfs_subvolume_writers { 1129 struct percpu_counter counter; 1130 wait_queue_head_t wait; 1131 }; 1132 1133 /* 1134 * The state of btrfs root 1135 */ 1136 /* 1137 * btrfs_record_root_in_trans is a multi-step process, 1138 * and it can race with the balancing code. But the 1139 * race is very small, and only the first time the root 1140 * is added to each transaction. So IN_TRANS_SETUP 1141 * is used to tell us when more checks are required 1142 */ 1143 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1144 #define BTRFS_ROOT_REF_COWS 1 1145 #define BTRFS_ROOT_TRACK_DIRTY 2 1146 #define BTRFS_ROOT_IN_RADIX 3 1147 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1148 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1149 #define BTRFS_ROOT_FORCE_COW 6 1150 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1151 #define BTRFS_ROOT_DIRTY 8 1152 1153 /* 1154 * in ram representation of the tree. extent_root is used for all allocations 1155 * and for the extent tree extent_root root. 1156 */ 1157 struct btrfs_root { 1158 struct extent_buffer *node; 1159 1160 struct extent_buffer *commit_root; 1161 struct btrfs_root *log_root; 1162 struct btrfs_root *reloc_root; 1163 1164 unsigned long state; 1165 struct btrfs_root_item root_item; 1166 struct btrfs_key root_key; 1167 struct btrfs_fs_info *fs_info; 1168 struct extent_io_tree dirty_log_pages; 1169 1170 struct mutex objectid_mutex; 1171 1172 spinlock_t accounting_lock; 1173 struct btrfs_block_rsv *block_rsv; 1174 1175 /* free ino cache stuff */ 1176 struct btrfs_free_space_ctl *free_ino_ctl; 1177 enum btrfs_caching_type ino_cache_state; 1178 spinlock_t ino_cache_lock; 1179 wait_queue_head_t ino_cache_wait; 1180 struct btrfs_free_space_ctl *free_ino_pinned; 1181 u64 ino_cache_progress; 1182 struct inode *ino_cache_inode; 1183 1184 struct mutex log_mutex; 1185 wait_queue_head_t log_writer_wait; 1186 wait_queue_head_t log_commit_wait[2]; 1187 struct list_head log_ctxs[2]; 1188 atomic_t log_writers; 1189 atomic_t log_commit[2]; 1190 atomic_t log_batch; 1191 int log_transid; 1192 /* No matter the commit succeeds or not*/ 1193 int log_transid_committed; 1194 /* Just be updated when the commit succeeds. */ 1195 int last_log_commit; 1196 pid_t log_start_pid; 1197 1198 u64 last_trans; 1199 1200 u32 type; 1201 1202 u64 highest_objectid; 1203 1204 u64 defrag_trans_start; 1205 struct btrfs_key defrag_progress; 1206 struct btrfs_key defrag_max; 1207 1208 /* the dirty list is only used by non-reference counted roots */ 1209 struct list_head dirty_list; 1210 1211 struct list_head root_list; 1212 1213 spinlock_t log_extents_lock[2]; 1214 struct list_head logged_list[2]; 1215 1216 int orphan_cleanup_state; 1217 1218 spinlock_t inode_lock; 1219 /* red-black tree that keeps track of in-memory inodes */ 1220 struct rb_root inode_tree; 1221 1222 /* 1223 * radix tree that keeps track of delayed nodes of every inode, 1224 * protected by inode_lock 1225 */ 1226 struct radix_tree_root delayed_nodes_tree; 1227 /* 1228 * right now this just gets used so that a root has its own devid 1229 * for stat. It may be used for more later 1230 */ 1231 dev_t anon_dev; 1232 1233 spinlock_t root_item_lock; 1234 refcount_t refs; 1235 1236 struct mutex delalloc_mutex; 1237 spinlock_t delalloc_lock; 1238 /* 1239 * all of the inodes that have delalloc bytes. It is possible for 1240 * this list to be empty even when there is still dirty data=ordered 1241 * extents waiting to finish IO. 1242 */ 1243 struct list_head delalloc_inodes; 1244 struct list_head delalloc_root; 1245 u64 nr_delalloc_inodes; 1246 1247 struct mutex ordered_extent_mutex; 1248 /* 1249 * this is used by the balancing code to wait for all the pending 1250 * ordered extents 1251 */ 1252 spinlock_t ordered_extent_lock; 1253 1254 /* 1255 * all of the data=ordered extents pending writeback 1256 * these can span multiple transactions and basically include 1257 * every dirty data page that isn't from nodatacow 1258 */ 1259 struct list_head ordered_extents; 1260 struct list_head ordered_root; 1261 u64 nr_ordered_extents; 1262 1263 /* 1264 * Number of currently running SEND ioctls to prevent 1265 * manipulation with the read-only status via SUBVOL_SETFLAGS 1266 */ 1267 int send_in_progress; 1268 struct btrfs_subvolume_writers *subv_writers; 1269 atomic_t will_be_snapshotted; 1270 atomic_t snapshot_force_cow; 1271 1272 /* For qgroup metadata reserved space */ 1273 spinlock_t qgroup_meta_rsv_lock; 1274 u64 qgroup_meta_rsv_pertrans; 1275 u64 qgroup_meta_rsv_prealloc; 1276 1277 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1278 u64 alloc_bytenr; 1279 #endif 1280 }; 1281 1282 struct btrfs_file_private { 1283 void *filldir_buf; 1284 }; 1285 1286 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1287 { 1288 return btrfs_sb(inode->i_sb)->sectorsize; 1289 } 1290 1291 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1292 { 1293 1294 return info->nodesize - sizeof(struct btrfs_header); 1295 } 1296 1297 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1298 1299 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1300 { 1301 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1302 } 1303 1304 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1305 { 1306 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1307 } 1308 1309 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1310 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1311 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1312 { 1313 return BTRFS_MAX_ITEM_SIZE(info) - 1314 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1315 } 1316 1317 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1318 { 1319 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1320 } 1321 1322 /* 1323 * Flags for mount options. 1324 * 1325 * Note: don't forget to add new options to btrfs_show_options() 1326 */ 1327 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1328 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1329 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1330 #define BTRFS_MOUNT_SSD (1 << 3) 1331 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1332 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1333 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1334 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1335 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1336 #define BTRFS_MOUNT_NOSSD (1 << 9) 1337 #define BTRFS_MOUNT_DISCARD (1 << 10) 1338 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1339 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1340 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1341 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1342 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1343 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1344 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1345 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1346 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1347 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1348 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1349 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1350 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1351 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1352 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1353 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1354 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1355 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1356 1357 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1358 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1359 1360 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1361 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1362 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1363 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1364 BTRFS_MOUNT_##opt) 1365 1366 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1367 { \ 1368 if (!btrfs_test_opt(fs_info, opt)) \ 1369 btrfs_info(fs_info, fmt, ##args); \ 1370 btrfs_set_opt(fs_info->mount_opt, opt); \ 1371 } 1372 1373 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1374 { \ 1375 if (btrfs_test_opt(fs_info, opt)) \ 1376 btrfs_info(fs_info, fmt, ##args); \ 1377 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1378 } 1379 1380 #ifdef CONFIG_BTRFS_DEBUG 1381 static inline int 1382 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1383 { 1384 struct btrfs_fs_info *fs_info = block_group->fs_info; 1385 1386 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1387 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1388 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1389 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1390 } 1391 #endif 1392 1393 /* 1394 * Requests for changes that need to be done during transaction commit. 1395 * 1396 * Internal mount options that are used for special handling of the real 1397 * mount options (eg. cannot be set during remount and have to be set during 1398 * transaction commit) 1399 */ 1400 1401 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1402 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1403 #define BTRFS_PENDING_COMMIT (2) 1404 1405 #define btrfs_test_pending(info, opt) \ 1406 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1407 #define btrfs_set_pending(info, opt) \ 1408 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1409 #define btrfs_clear_pending(info, opt) \ 1410 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1411 1412 /* 1413 * Helpers for setting pending mount option changes. 1414 * 1415 * Expects corresponding macros 1416 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1417 */ 1418 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1419 do { \ 1420 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1421 btrfs_info((info), fmt, ##args); \ 1422 btrfs_set_pending((info), SET_##opt); \ 1423 btrfs_clear_pending((info), CLEAR_##opt); \ 1424 } \ 1425 } while(0) 1426 1427 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1428 do { \ 1429 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1430 btrfs_info((info), fmt, ##args); \ 1431 btrfs_set_pending((info), CLEAR_##opt); \ 1432 btrfs_clear_pending((info), SET_##opt); \ 1433 } \ 1434 } while(0) 1435 1436 /* 1437 * Inode flags 1438 */ 1439 #define BTRFS_INODE_NODATASUM (1 << 0) 1440 #define BTRFS_INODE_NODATACOW (1 << 1) 1441 #define BTRFS_INODE_READONLY (1 << 2) 1442 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1443 #define BTRFS_INODE_PREALLOC (1 << 4) 1444 #define BTRFS_INODE_SYNC (1 << 5) 1445 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1446 #define BTRFS_INODE_APPEND (1 << 7) 1447 #define BTRFS_INODE_NODUMP (1 << 8) 1448 #define BTRFS_INODE_NOATIME (1 << 9) 1449 #define BTRFS_INODE_DIRSYNC (1 << 10) 1450 #define BTRFS_INODE_COMPRESS (1 << 11) 1451 1452 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1453 1454 struct btrfs_map_token { 1455 const struct extent_buffer *eb; 1456 char *kaddr; 1457 unsigned long offset; 1458 }; 1459 1460 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1461 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1462 1463 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1464 { 1465 token->kaddr = NULL; 1466 } 1467 1468 /* some macros to generate set/get functions for the struct fields. This 1469 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1470 * one for u8: 1471 */ 1472 #define le8_to_cpu(v) (v) 1473 #define cpu_to_le8(v) (v) 1474 #define __le8 u8 1475 1476 #define read_eb_member(eb, ptr, type, member, result) (\ 1477 read_extent_buffer(eb, (char *)(result), \ 1478 ((unsigned long)(ptr)) + \ 1479 offsetof(type, member), \ 1480 sizeof(((type *)0)->member))) 1481 1482 #define write_eb_member(eb, ptr, type, member, result) (\ 1483 write_extent_buffer(eb, (char *)(result), \ 1484 ((unsigned long)(ptr)) + \ 1485 offsetof(type, member), \ 1486 sizeof(((type *)0)->member))) 1487 1488 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1489 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1490 const void *ptr, unsigned long off, \ 1491 struct btrfs_map_token *token); \ 1492 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1493 unsigned long off, u##bits val, \ 1494 struct btrfs_map_token *token); \ 1495 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1496 const void *ptr, \ 1497 unsigned long off) \ 1498 { \ 1499 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1500 } \ 1501 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1502 unsigned long off, u##bits val) \ 1503 { \ 1504 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1505 } 1506 1507 DECLARE_BTRFS_SETGET_BITS(8) 1508 DECLARE_BTRFS_SETGET_BITS(16) 1509 DECLARE_BTRFS_SETGET_BITS(32) 1510 DECLARE_BTRFS_SETGET_BITS(64) 1511 1512 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1513 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1514 const type *s) \ 1515 { \ 1516 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1517 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1518 } \ 1519 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1520 u##bits val) \ 1521 { \ 1522 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1523 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1524 } \ 1525 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1526 const type *s, \ 1527 struct btrfs_map_token *token) \ 1528 { \ 1529 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1530 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1531 } \ 1532 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1533 type *s, u##bits val, \ 1534 struct btrfs_map_token *token) \ 1535 { \ 1536 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1537 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1538 } 1539 1540 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1541 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1542 { \ 1543 const type *p = page_address(eb->pages[0]); \ 1544 u##bits res = le##bits##_to_cpu(p->member); \ 1545 return res; \ 1546 } \ 1547 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1548 u##bits val) \ 1549 { \ 1550 type *p = page_address(eb->pages[0]); \ 1551 p->member = cpu_to_le##bits(val); \ 1552 } 1553 1554 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1555 static inline u##bits btrfs_##name(const type *s) \ 1556 { \ 1557 return le##bits##_to_cpu(s->member); \ 1558 } \ 1559 static inline void btrfs_set_##name(type *s, u##bits val) \ 1560 { \ 1561 s->member = cpu_to_le##bits(val); \ 1562 } 1563 1564 1565 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1566 struct btrfs_dev_item *s) 1567 { 1568 BUILD_BUG_ON(sizeof(u64) != 1569 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1570 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1571 total_bytes)); 1572 } 1573 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1574 struct btrfs_dev_item *s, 1575 u64 val) 1576 { 1577 BUILD_BUG_ON(sizeof(u64) != 1578 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1579 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1580 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1581 } 1582 1583 1584 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1585 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1586 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1587 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1588 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1589 start_offset, 64); 1590 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1591 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1592 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1593 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1594 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1595 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1596 1597 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1598 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1599 total_bytes, 64); 1600 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1601 bytes_used, 64); 1602 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1603 io_align, 32); 1604 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1605 io_width, 32); 1606 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1607 sector_size, 32); 1608 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1609 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1610 dev_group, 32); 1611 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1612 seek_speed, 8); 1613 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1614 bandwidth, 8); 1615 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1616 generation, 64); 1617 1618 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1619 { 1620 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1621 } 1622 1623 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1624 { 1625 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1626 } 1627 1628 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1629 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1630 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1631 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1632 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1633 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1634 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1635 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1636 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1637 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1638 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1639 1640 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1641 { 1642 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1643 } 1644 1645 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1646 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1647 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1648 stripe_len, 64); 1649 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1650 io_align, 32); 1651 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1652 io_width, 32); 1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1654 sector_size, 32); 1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1657 num_stripes, 16); 1658 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1659 sub_stripes, 16); 1660 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1661 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1662 1663 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1664 int nr) 1665 { 1666 unsigned long offset = (unsigned long)c; 1667 offset += offsetof(struct btrfs_chunk, stripe); 1668 offset += nr * sizeof(struct btrfs_stripe); 1669 return (struct btrfs_stripe *)offset; 1670 } 1671 1672 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1673 { 1674 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1675 } 1676 1677 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1678 struct btrfs_chunk *c, int nr) 1679 { 1680 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1681 } 1682 1683 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1684 struct btrfs_chunk *c, int nr) 1685 { 1686 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1687 } 1688 1689 /* struct btrfs_block_group_item */ 1690 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1691 used, 64); 1692 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1693 used, 64); 1694 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1695 struct btrfs_block_group_item, chunk_objectid, 64); 1696 1697 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1698 struct btrfs_block_group_item, chunk_objectid, 64); 1699 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1700 struct btrfs_block_group_item, flags, 64); 1701 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1702 struct btrfs_block_group_item, flags, 64); 1703 1704 /* struct btrfs_free_space_info */ 1705 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1706 extent_count, 32); 1707 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1708 1709 /* struct btrfs_inode_ref */ 1710 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1711 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1712 1713 /* struct btrfs_inode_extref */ 1714 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1715 parent_objectid, 64); 1716 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1717 name_len, 16); 1718 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1719 1720 /* struct btrfs_inode_item */ 1721 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1722 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1723 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1724 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1725 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1726 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1727 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1728 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1729 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1730 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1731 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1732 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1734 generation, 64); 1735 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1736 sequence, 64); 1737 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1738 transid, 64); 1739 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1740 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1741 nbytes, 64); 1742 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1743 block_group, 64); 1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1750 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1751 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1752 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1753 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1754 1755 /* struct btrfs_dev_extent */ 1756 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1757 chunk_tree, 64); 1758 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1759 chunk_objectid, 64); 1760 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1761 chunk_offset, 64); 1762 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1763 1764 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1765 { 1766 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1767 return (unsigned long)dev + ptr; 1768 } 1769 1770 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1771 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1772 generation, 64); 1773 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1774 1775 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1776 1777 1778 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1779 1780 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1781 struct btrfs_tree_block_info *item, 1782 struct btrfs_disk_key *key) 1783 { 1784 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1785 } 1786 1787 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1788 struct btrfs_tree_block_info *item, 1789 struct btrfs_disk_key *key) 1790 { 1791 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1792 } 1793 1794 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1795 root, 64); 1796 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1797 objectid, 64); 1798 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1799 offset, 64); 1800 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1801 count, 32); 1802 1803 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1804 count, 32); 1805 1806 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1807 type, 8); 1808 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1809 offset, 64); 1810 1811 static inline u32 btrfs_extent_inline_ref_size(int type) 1812 { 1813 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1814 type == BTRFS_SHARED_BLOCK_REF_KEY) 1815 return sizeof(struct btrfs_extent_inline_ref); 1816 if (type == BTRFS_SHARED_DATA_REF_KEY) 1817 return sizeof(struct btrfs_shared_data_ref) + 1818 sizeof(struct btrfs_extent_inline_ref); 1819 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1820 return sizeof(struct btrfs_extent_data_ref) + 1821 offsetof(struct btrfs_extent_inline_ref, offset); 1822 return 0; 1823 } 1824 1825 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1826 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1827 generation, 64); 1828 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1829 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1830 1831 /* struct btrfs_node */ 1832 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1833 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1834 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1835 blockptr, 64); 1836 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1837 generation, 64); 1838 1839 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1840 { 1841 unsigned long ptr; 1842 ptr = offsetof(struct btrfs_node, ptrs) + 1843 sizeof(struct btrfs_key_ptr) * nr; 1844 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1845 } 1846 1847 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1848 int nr, u64 val) 1849 { 1850 unsigned long ptr; 1851 ptr = offsetof(struct btrfs_node, ptrs) + 1852 sizeof(struct btrfs_key_ptr) * nr; 1853 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1854 } 1855 1856 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1857 { 1858 unsigned long ptr; 1859 ptr = offsetof(struct btrfs_node, ptrs) + 1860 sizeof(struct btrfs_key_ptr) * nr; 1861 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1862 } 1863 1864 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1865 int nr, u64 val) 1866 { 1867 unsigned long ptr; 1868 ptr = offsetof(struct btrfs_node, ptrs) + 1869 sizeof(struct btrfs_key_ptr) * nr; 1870 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1871 } 1872 1873 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1874 { 1875 return offsetof(struct btrfs_node, ptrs) + 1876 sizeof(struct btrfs_key_ptr) * nr; 1877 } 1878 1879 void btrfs_node_key(const struct extent_buffer *eb, 1880 struct btrfs_disk_key *disk_key, int nr); 1881 1882 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1883 struct btrfs_disk_key *disk_key, int nr) 1884 { 1885 unsigned long ptr; 1886 ptr = btrfs_node_key_ptr_offset(nr); 1887 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1888 struct btrfs_key_ptr, key, disk_key); 1889 } 1890 1891 /* struct btrfs_item */ 1892 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1893 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1894 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1895 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1896 1897 static inline unsigned long btrfs_item_nr_offset(int nr) 1898 { 1899 return offsetof(struct btrfs_leaf, items) + 1900 sizeof(struct btrfs_item) * nr; 1901 } 1902 1903 static inline struct btrfs_item *btrfs_item_nr(int nr) 1904 { 1905 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1906 } 1907 1908 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1909 struct btrfs_item *item) 1910 { 1911 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1912 } 1913 1914 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1915 { 1916 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1917 } 1918 1919 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1920 { 1921 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1922 } 1923 1924 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1925 { 1926 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1927 } 1928 1929 static inline void btrfs_item_key(const struct extent_buffer *eb, 1930 struct btrfs_disk_key *disk_key, int nr) 1931 { 1932 struct btrfs_item *item = btrfs_item_nr(nr); 1933 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1934 } 1935 1936 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1937 struct btrfs_disk_key *disk_key, int nr) 1938 { 1939 struct btrfs_item *item = btrfs_item_nr(nr); 1940 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1941 } 1942 1943 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1944 1945 /* 1946 * struct btrfs_root_ref 1947 */ 1948 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1949 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1950 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1951 1952 /* struct btrfs_dir_item */ 1953 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1954 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1955 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1956 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1957 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1958 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1959 data_len, 16); 1960 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1961 name_len, 16); 1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1963 transid, 64); 1964 1965 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1966 const struct btrfs_dir_item *item, 1967 struct btrfs_disk_key *key) 1968 { 1969 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1970 } 1971 1972 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1973 struct btrfs_dir_item *item, 1974 const struct btrfs_disk_key *key) 1975 { 1976 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1977 } 1978 1979 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1980 num_entries, 64); 1981 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1982 num_bitmaps, 64); 1983 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1984 generation, 64); 1985 1986 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1987 const struct btrfs_free_space_header *h, 1988 struct btrfs_disk_key *key) 1989 { 1990 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1991 } 1992 1993 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1994 struct btrfs_free_space_header *h, 1995 const struct btrfs_disk_key *key) 1996 { 1997 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1998 } 1999 2000 /* struct btrfs_disk_key */ 2001 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2002 objectid, 64); 2003 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2004 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2005 2006 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2007 const struct btrfs_disk_key *disk) 2008 { 2009 cpu->offset = le64_to_cpu(disk->offset); 2010 cpu->type = disk->type; 2011 cpu->objectid = le64_to_cpu(disk->objectid); 2012 } 2013 2014 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2015 const struct btrfs_key *cpu) 2016 { 2017 disk->offset = cpu_to_le64(cpu->offset); 2018 disk->type = cpu->type; 2019 disk->objectid = cpu_to_le64(cpu->objectid); 2020 } 2021 2022 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2023 struct btrfs_key *key, int nr) 2024 { 2025 struct btrfs_disk_key disk_key; 2026 btrfs_node_key(eb, &disk_key, nr); 2027 btrfs_disk_key_to_cpu(key, &disk_key); 2028 } 2029 2030 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2031 struct btrfs_key *key, int nr) 2032 { 2033 struct btrfs_disk_key disk_key; 2034 btrfs_item_key(eb, &disk_key, nr); 2035 btrfs_disk_key_to_cpu(key, &disk_key); 2036 } 2037 2038 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2039 const struct btrfs_dir_item *item, 2040 struct btrfs_key *key) 2041 { 2042 struct btrfs_disk_key disk_key; 2043 btrfs_dir_item_key(eb, item, &disk_key); 2044 btrfs_disk_key_to_cpu(key, &disk_key); 2045 } 2046 2047 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2048 { 2049 return key->type; 2050 } 2051 2052 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2053 { 2054 key->type = val; 2055 } 2056 2057 /* struct btrfs_header */ 2058 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2059 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2060 generation, 64); 2061 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2062 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2063 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2064 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2065 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2066 generation, 64); 2067 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2068 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2069 nritems, 32); 2070 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2071 2072 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2073 { 2074 return (btrfs_header_flags(eb) & flag) == flag; 2075 } 2076 2077 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2078 { 2079 u64 flags = btrfs_header_flags(eb); 2080 btrfs_set_header_flags(eb, flags | flag); 2081 return (flags & flag) == flag; 2082 } 2083 2084 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2085 { 2086 u64 flags = btrfs_header_flags(eb); 2087 btrfs_set_header_flags(eb, flags & ~flag); 2088 return (flags & flag) == flag; 2089 } 2090 2091 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2092 { 2093 u64 flags = btrfs_header_flags(eb); 2094 return flags >> BTRFS_BACKREF_REV_SHIFT; 2095 } 2096 2097 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2098 int rev) 2099 { 2100 u64 flags = btrfs_header_flags(eb); 2101 flags &= ~BTRFS_BACKREF_REV_MASK; 2102 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2103 btrfs_set_header_flags(eb, flags); 2104 } 2105 2106 static inline unsigned long btrfs_header_fsid(void) 2107 { 2108 return offsetof(struct btrfs_header, fsid); 2109 } 2110 2111 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2112 { 2113 return offsetof(struct btrfs_header, chunk_tree_uuid); 2114 } 2115 2116 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2117 { 2118 return btrfs_header_level(eb) == 0; 2119 } 2120 2121 /* struct btrfs_root_item */ 2122 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2123 generation, 64); 2124 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2125 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2126 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2127 2128 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2129 generation, 64); 2130 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2131 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2132 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2133 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2134 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2135 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2136 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2137 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2138 last_snapshot, 64); 2139 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2140 generation_v2, 64); 2141 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2142 ctransid, 64); 2143 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2144 otransid, 64); 2145 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2146 stransid, 64); 2147 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2148 rtransid, 64); 2149 2150 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2151 { 2152 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2153 } 2154 2155 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2156 { 2157 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2158 } 2159 2160 /* struct btrfs_root_backup */ 2161 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2162 tree_root, 64); 2163 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2164 tree_root_gen, 64); 2165 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2166 tree_root_level, 8); 2167 2168 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2169 chunk_root, 64); 2170 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2171 chunk_root_gen, 64); 2172 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2173 chunk_root_level, 8); 2174 2175 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2176 extent_root, 64); 2177 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2178 extent_root_gen, 64); 2179 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2180 extent_root_level, 8); 2181 2182 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2183 fs_root, 64); 2184 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2185 fs_root_gen, 64); 2186 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2187 fs_root_level, 8); 2188 2189 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2190 dev_root, 64); 2191 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2192 dev_root_gen, 64); 2193 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2194 dev_root_level, 8); 2195 2196 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2197 csum_root, 64); 2198 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2199 csum_root_gen, 64); 2200 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2201 csum_root_level, 8); 2202 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2203 total_bytes, 64); 2204 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2205 bytes_used, 64); 2206 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2207 num_devices, 64); 2208 2209 /* struct btrfs_balance_item */ 2210 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2211 2212 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2213 const struct btrfs_balance_item *bi, 2214 struct btrfs_disk_balance_args *ba) 2215 { 2216 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2217 } 2218 2219 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2220 struct btrfs_balance_item *bi, 2221 const struct btrfs_disk_balance_args *ba) 2222 { 2223 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2224 } 2225 2226 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2227 const struct btrfs_balance_item *bi, 2228 struct btrfs_disk_balance_args *ba) 2229 { 2230 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2231 } 2232 2233 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2234 struct btrfs_balance_item *bi, 2235 const struct btrfs_disk_balance_args *ba) 2236 { 2237 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2238 } 2239 2240 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2241 const struct btrfs_balance_item *bi, 2242 struct btrfs_disk_balance_args *ba) 2243 { 2244 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2245 } 2246 2247 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2248 struct btrfs_balance_item *bi, 2249 const struct btrfs_disk_balance_args *ba) 2250 { 2251 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2252 } 2253 2254 static inline void 2255 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2256 const struct btrfs_disk_balance_args *disk) 2257 { 2258 memset(cpu, 0, sizeof(*cpu)); 2259 2260 cpu->profiles = le64_to_cpu(disk->profiles); 2261 cpu->usage = le64_to_cpu(disk->usage); 2262 cpu->devid = le64_to_cpu(disk->devid); 2263 cpu->pstart = le64_to_cpu(disk->pstart); 2264 cpu->pend = le64_to_cpu(disk->pend); 2265 cpu->vstart = le64_to_cpu(disk->vstart); 2266 cpu->vend = le64_to_cpu(disk->vend); 2267 cpu->target = le64_to_cpu(disk->target); 2268 cpu->flags = le64_to_cpu(disk->flags); 2269 cpu->limit = le64_to_cpu(disk->limit); 2270 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2271 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2272 } 2273 2274 static inline void 2275 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2276 const struct btrfs_balance_args *cpu) 2277 { 2278 memset(disk, 0, sizeof(*disk)); 2279 2280 disk->profiles = cpu_to_le64(cpu->profiles); 2281 disk->usage = cpu_to_le64(cpu->usage); 2282 disk->devid = cpu_to_le64(cpu->devid); 2283 disk->pstart = cpu_to_le64(cpu->pstart); 2284 disk->pend = cpu_to_le64(cpu->pend); 2285 disk->vstart = cpu_to_le64(cpu->vstart); 2286 disk->vend = cpu_to_le64(cpu->vend); 2287 disk->target = cpu_to_le64(cpu->target); 2288 disk->flags = cpu_to_le64(cpu->flags); 2289 disk->limit = cpu_to_le64(cpu->limit); 2290 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2291 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2292 } 2293 2294 /* struct btrfs_super_block */ 2295 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2296 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2297 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2298 generation, 64); 2299 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2300 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2301 struct btrfs_super_block, sys_chunk_array_size, 32); 2302 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2303 struct btrfs_super_block, chunk_root_generation, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2305 root_level, 8); 2306 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2307 chunk_root, 64); 2308 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2309 chunk_root_level, 8); 2310 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2311 log_root, 64); 2312 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2313 log_root_transid, 64); 2314 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2315 log_root_level, 8); 2316 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2317 total_bytes, 64); 2318 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2319 bytes_used, 64); 2320 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2321 sectorsize, 32); 2322 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2323 nodesize, 32); 2324 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2325 stripesize, 32); 2326 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2327 root_dir_objectid, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2329 num_devices, 64); 2330 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2331 compat_flags, 64); 2332 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2333 compat_ro_flags, 64); 2334 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2335 incompat_flags, 64); 2336 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2337 csum_type, 16); 2338 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2339 cache_generation, 64); 2340 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2341 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2342 uuid_tree_generation, 64); 2343 2344 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2345 { 2346 u16 t = btrfs_super_csum_type(s); 2347 /* 2348 * csum type is validated at mount time 2349 */ 2350 return btrfs_csum_sizes[t]; 2351 } 2352 2353 2354 /* 2355 * The leaf data grows from end-to-front in the node. 2356 * this returns the address of the start of the last item, 2357 * which is the stop of the leaf data stack 2358 */ 2359 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2360 const struct extent_buffer *leaf) 2361 { 2362 u32 nr = btrfs_header_nritems(leaf); 2363 2364 if (nr == 0) 2365 return BTRFS_LEAF_DATA_SIZE(fs_info); 2366 return btrfs_item_offset_nr(leaf, nr - 1); 2367 } 2368 2369 /* struct btrfs_file_extent_item */ 2370 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2371 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2372 struct btrfs_file_extent_item, disk_bytenr, 64); 2373 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2374 struct btrfs_file_extent_item, offset, 64); 2375 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2376 struct btrfs_file_extent_item, generation, 64); 2377 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2378 struct btrfs_file_extent_item, num_bytes, 64); 2379 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2380 struct btrfs_file_extent_item, disk_num_bytes, 64); 2381 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2382 struct btrfs_file_extent_item, compression, 8); 2383 2384 static inline unsigned long 2385 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2386 { 2387 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2388 } 2389 2390 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2391 { 2392 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2393 } 2394 2395 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2396 disk_bytenr, 64); 2397 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2398 generation, 64); 2399 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2400 disk_num_bytes, 64); 2401 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2402 offset, 64); 2403 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2404 num_bytes, 64); 2405 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2406 ram_bytes, 64); 2407 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2408 compression, 8); 2409 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2410 encryption, 8); 2411 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2412 other_encoding, 16); 2413 2414 /* 2415 * this returns the number of bytes used by the item on disk, minus the 2416 * size of any extent headers. If a file is compressed on disk, this is 2417 * the compressed size 2418 */ 2419 static inline u32 btrfs_file_extent_inline_item_len( 2420 const struct extent_buffer *eb, 2421 struct btrfs_item *e) 2422 { 2423 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2424 } 2425 2426 /* btrfs_dev_stats_item */ 2427 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2428 const struct btrfs_dev_stats_item *ptr, 2429 int index) 2430 { 2431 u64 val; 2432 2433 read_extent_buffer(eb, &val, 2434 offsetof(struct btrfs_dev_stats_item, values) + 2435 ((unsigned long)ptr) + (index * sizeof(u64)), 2436 sizeof(val)); 2437 return val; 2438 } 2439 2440 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2441 struct btrfs_dev_stats_item *ptr, 2442 int index, u64 val) 2443 { 2444 write_extent_buffer(eb, &val, 2445 offsetof(struct btrfs_dev_stats_item, values) + 2446 ((unsigned long)ptr) + (index * sizeof(u64)), 2447 sizeof(val)); 2448 } 2449 2450 /* btrfs_qgroup_status_item */ 2451 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2452 generation, 64); 2453 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2454 version, 64); 2455 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2456 flags, 64); 2457 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2458 rescan, 64); 2459 2460 /* btrfs_qgroup_info_item */ 2461 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2462 generation, 64); 2463 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2464 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2465 rfer_cmpr, 64); 2466 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2467 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2468 excl_cmpr, 64); 2469 2470 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2471 struct btrfs_qgroup_info_item, generation, 64); 2472 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2473 rfer, 64); 2474 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2475 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2476 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2477 excl, 64); 2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2479 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2480 2481 /* btrfs_qgroup_limit_item */ 2482 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2483 flags, 64); 2484 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2485 max_rfer, 64); 2486 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2487 max_excl, 64); 2488 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2489 rsv_rfer, 64); 2490 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2491 rsv_excl, 64); 2492 2493 /* btrfs_dev_replace_item */ 2494 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2495 struct btrfs_dev_replace_item, src_devid, 64); 2496 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2497 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2498 64); 2499 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2500 replace_state, 64); 2501 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2502 time_started, 64); 2503 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2504 time_stopped, 64); 2505 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2506 num_write_errors, 64); 2507 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2508 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2509 64); 2510 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2511 cursor_left, 64); 2512 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2513 cursor_right, 64); 2514 2515 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2516 struct btrfs_dev_replace_item, src_devid, 64); 2517 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2518 struct btrfs_dev_replace_item, 2519 cont_reading_from_srcdev_mode, 64); 2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2521 struct btrfs_dev_replace_item, replace_state, 64); 2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2523 struct btrfs_dev_replace_item, time_started, 64); 2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2525 struct btrfs_dev_replace_item, time_stopped, 64); 2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2527 struct btrfs_dev_replace_item, num_write_errors, 64); 2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2529 struct btrfs_dev_replace_item, 2530 num_uncorrectable_read_errors, 64); 2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2532 struct btrfs_dev_replace_item, cursor_left, 64); 2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2534 struct btrfs_dev_replace_item, cursor_right, 64); 2535 2536 /* helper function to cast into the data area of the leaf. */ 2537 #define btrfs_item_ptr(leaf, slot, type) \ 2538 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2539 btrfs_item_offset_nr(leaf, slot))) 2540 2541 #define btrfs_item_ptr_offset(leaf, slot) \ 2542 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2543 btrfs_item_offset_nr(leaf, slot))) 2544 2545 static inline u64 btrfs_name_hash(const char *name, int len) 2546 { 2547 return crc32c((u32)~1, name, len); 2548 } 2549 2550 /* 2551 * Figure the key offset of an extended inode ref 2552 */ 2553 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2554 int len) 2555 { 2556 return (u64) crc32c(parent_objectid, name, len); 2557 } 2558 2559 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2560 { 2561 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2562 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2563 } 2564 2565 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2566 { 2567 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2568 } 2569 2570 /* extent-tree.c */ 2571 2572 enum btrfs_inline_ref_type { 2573 BTRFS_REF_TYPE_INVALID = 0, 2574 BTRFS_REF_TYPE_BLOCK = 1, 2575 BTRFS_REF_TYPE_DATA = 2, 2576 BTRFS_REF_TYPE_ANY = 3, 2577 }; 2578 2579 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2580 struct btrfs_extent_inline_ref *iref, 2581 enum btrfs_inline_ref_type is_data); 2582 2583 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2584 2585 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2586 unsigned num_items) 2587 { 2588 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2589 } 2590 2591 /* 2592 * Doing a truncate won't result in new nodes or leaves, just what we need for 2593 * COW. 2594 */ 2595 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2596 unsigned num_items) 2597 { 2598 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2599 } 2600 2601 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans); 2602 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans); 2603 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2604 const u64 start); 2605 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2606 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2607 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2608 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2609 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2610 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2611 unsigned long count); 2612 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2613 unsigned long count, u64 transid, int wait); 2614 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2615 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2616 struct btrfs_fs_info *fs_info, u64 bytenr, 2617 u64 offset, int metadata, u64 *refs, u64 *flags); 2618 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2619 u64 bytenr, u64 num, int reserved); 2620 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2621 u64 bytenr, u64 num_bytes); 2622 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2623 struct extent_buffer *eb); 2624 int btrfs_cross_ref_exist(struct btrfs_root *root, 2625 u64 objectid, u64 offset, u64 bytenr); 2626 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2627 struct btrfs_fs_info *info, 2628 u64 bytenr); 2629 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2630 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2631 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2632 struct btrfs_root *root, 2633 u64 parent, u64 root_objectid, 2634 const struct btrfs_disk_key *key, 2635 int level, u64 hint, 2636 u64 empty_size); 2637 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2638 struct btrfs_root *root, 2639 struct extent_buffer *buf, 2640 u64 parent, int last_ref); 2641 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2642 struct btrfs_root *root, u64 owner, 2643 u64 offset, u64 ram_bytes, 2644 struct btrfs_key *ins); 2645 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2646 u64 root_objectid, u64 owner, u64 offset, 2647 struct btrfs_key *ins); 2648 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2649 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2650 struct btrfs_key *ins, int is_data, int delalloc); 2651 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2652 struct extent_buffer *buf, int full_backref); 2653 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2654 struct extent_buffer *buf, int full_backref); 2655 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2656 struct btrfs_fs_info *fs_info, 2657 u64 bytenr, u64 num_bytes, u64 flags, 2658 int level, int is_data); 2659 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2660 struct btrfs_root *root, 2661 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2662 u64 owner, u64 offset); 2663 2664 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2665 u64 start, u64 len, int delalloc); 2666 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2667 u64 start, u64 len); 2668 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2669 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2670 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2671 struct btrfs_root *root, 2672 u64 bytenr, u64 num_bytes, u64 parent, 2673 u64 root_objectid, u64 owner, u64 offset); 2674 2675 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2676 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2677 struct btrfs_fs_info *fs_info); 2678 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2679 struct btrfs_fs_info *fs_info); 2680 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2681 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2682 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2683 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2684 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2685 u64 bytes_used, u64 type, u64 chunk_offset, 2686 u64 size); 2687 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2688 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2689 struct btrfs_fs_info *fs_info, 2690 const u64 chunk_offset); 2691 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2692 u64 group_start, struct extent_map *em); 2693 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2694 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2695 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2696 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2697 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2698 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2699 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2700 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2701 2702 enum btrfs_reserve_flush_enum { 2703 /* If we are in the transaction, we can't flush anything.*/ 2704 BTRFS_RESERVE_NO_FLUSH, 2705 /* 2706 * Flushing delalloc may cause deadlock somewhere, in this 2707 * case, use FLUSH LIMIT 2708 */ 2709 BTRFS_RESERVE_FLUSH_LIMIT, 2710 BTRFS_RESERVE_FLUSH_ALL, 2711 }; 2712 2713 enum btrfs_flush_state { 2714 FLUSH_DELAYED_ITEMS_NR = 1, 2715 FLUSH_DELAYED_ITEMS = 2, 2716 FLUSH_DELALLOC = 3, 2717 FLUSH_DELALLOC_WAIT = 4, 2718 ALLOC_CHUNK = 5, 2719 COMMIT_TRANS = 6, 2720 }; 2721 2722 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2723 int btrfs_check_data_free_space(struct inode *inode, 2724 struct extent_changeset **reserved, u64 start, u64 len); 2725 void btrfs_free_reserved_data_space(struct inode *inode, 2726 struct extent_changeset *reserved, u64 start, u64 len); 2727 void btrfs_delalloc_release_space(struct inode *inode, 2728 struct extent_changeset *reserved, 2729 u64 start, u64 len, bool qgroup_free); 2730 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2731 u64 len); 2732 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2733 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2734 struct btrfs_block_rsv *rsv, 2735 int nitems, bool use_global_rsv); 2736 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2737 struct btrfs_block_rsv *rsv); 2738 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2739 bool qgroup_free); 2740 2741 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2742 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2743 bool qgroup_free); 2744 int btrfs_delalloc_reserve_space(struct inode *inode, 2745 struct extent_changeset **reserved, u64 start, u64 len); 2746 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2747 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2748 unsigned short type); 2749 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2750 struct btrfs_block_rsv *rsv, 2751 unsigned short type); 2752 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2753 struct btrfs_block_rsv *rsv); 2754 int btrfs_block_rsv_add(struct btrfs_root *root, 2755 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2756 enum btrfs_reserve_flush_enum flush); 2757 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2758 int btrfs_block_rsv_refill(struct btrfs_root *root, 2759 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2760 enum btrfs_reserve_flush_enum flush); 2761 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2762 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2763 bool update_size); 2764 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2765 struct btrfs_block_rsv *dest, u64 num_bytes, 2766 int min_factor); 2767 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2768 struct btrfs_block_rsv *block_rsv, 2769 u64 num_bytes); 2770 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); 2771 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2772 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2773 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2774 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2775 u64 start, u64 end); 2776 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2777 u64 num_bytes, u64 *actual_bytes); 2778 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); 2779 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2780 2781 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2782 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2783 struct btrfs_fs_info *fs_info); 2784 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2785 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2786 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2787 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); 2788 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2789 u64 start, u64 end); 2790 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); 2791 2792 /* ctree.c */ 2793 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2794 int level, int *slot); 2795 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2796 int btrfs_previous_item(struct btrfs_root *root, 2797 struct btrfs_path *path, u64 min_objectid, 2798 int type); 2799 int btrfs_previous_extent_item(struct btrfs_root *root, 2800 struct btrfs_path *path, u64 min_objectid); 2801 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2802 struct btrfs_path *path, 2803 const struct btrfs_key *new_key); 2804 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2805 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2806 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2807 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2808 struct btrfs_key *key, int lowest_level, 2809 u64 min_trans); 2810 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2811 struct btrfs_path *path, 2812 u64 min_trans); 2813 enum btrfs_compare_tree_result { 2814 BTRFS_COMPARE_TREE_NEW, 2815 BTRFS_COMPARE_TREE_DELETED, 2816 BTRFS_COMPARE_TREE_CHANGED, 2817 BTRFS_COMPARE_TREE_SAME, 2818 }; 2819 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2820 struct btrfs_path *right_path, 2821 struct btrfs_key *key, 2822 enum btrfs_compare_tree_result result, 2823 void *ctx); 2824 int btrfs_compare_trees(struct btrfs_root *left_root, 2825 struct btrfs_root *right_root, 2826 btrfs_changed_cb_t cb, void *ctx); 2827 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2828 struct btrfs_root *root, struct extent_buffer *buf, 2829 struct extent_buffer *parent, int parent_slot, 2830 struct extent_buffer **cow_ret); 2831 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2832 struct btrfs_root *root, 2833 struct extent_buffer *buf, 2834 struct extent_buffer **cow_ret, u64 new_root_objectid); 2835 int btrfs_block_can_be_shared(struct btrfs_root *root, 2836 struct extent_buffer *buf); 2837 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2838 u32 data_size); 2839 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2840 struct btrfs_path *path, u32 new_size, int from_end); 2841 int btrfs_split_item(struct btrfs_trans_handle *trans, 2842 struct btrfs_root *root, 2843 struct btrfs_path *path, 2844 const struct btrfs_key *new_key, 2845 unsigned long split_offset); 2846 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2847 struct btrfs_root *root, 2848 struct btrfs_path *path, 2849 const struct btrfs_key *new_key); 2850 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2851 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2852 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2853 const struct btrfs_key *key, struct btrfs_path *p, 2854 int ins_len, int cow); 2855 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2856 struct btrfs_path *p, u64 time_seq); 2857 int btrfs_search_slot_for_read(struct btrfs_root *root, 2858 const struct btrfs_key *key, 2859 struct btrfs_path *p, int find_higher, 2860 int return_any); 2861 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2862 struct btrfs_root *root, struct extent_buffer *parent, 2863 int start_slot, u64 *last_ret, 2864 struct btrfs_key *progress); 2865 void btrfs_release_path(struct btrfs_path *p); 2866 struct btrfs_path *btrfs_alloc_path(void); 2867 void btrfs_free_path(struct btrfs_path *p); 2868 void btrfs_set_path_blocking(struct btrfs_path *p); 2869 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2870 2871 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2872 struct btrfs_path *path, int slot, int nr); 2873 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2874 struct btrfs_root *root, 2875 struct btrfs_path *path) 2876 { 2877 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2878 } 2879 2880 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2881 const struct btrfs_key *cpu_key, u32 *data_size, 2882 u32 total_data, u32 total_size, int nr); 2883 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2884 const struct btrfs_key *key, void *data, u32 data_size); 2885 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2886 struct btrfs_root *root, 2887 struct btrfs_path *path, 2888 const struct btrfs_key *cpu_key, u32 *data_size, 2889 int nr); 2890 2891 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2892 struct btrfs_root *root, 2893 struct btrfs_path *path, 2894 const struct btrfs_key *key, 2895 u32 data_size) 2896 { 2897 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2898 } 2899 2900 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2901 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2902 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2903 u64 time_seq); 2904 static inline int btrfs_next_old_item(struct btrfs_root *root, 2905 struct btrfs_path *p, u64 time_seq) 2906 { 2907 ++p->slots[0]; 2908 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2909 return btrfs_next_old_leaf(root, p, time_seq); 2910 return 0; 2911 } 2912 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2913 { 2914 return btrfs_next_old_item(root, p, 0); 2915 } 2916 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2917 struct extent_buffer *leaf); 2918 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2919 struct btrfs_block_rsv *block_rsv, 2920 int update_ref, int for_reloc); 2921 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2922 struct btrfs_root *root, 2923 struct extent_buffer *node, 2924 struct extent_buffer *parent); 2925 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2926 { 2927 /* 2928 * Do it this way so we only ever do one test_bit in the normal case. 2929 */ 2930 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2931 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2932 return 2; 2933 return 1; 2934 } 2935 return 0; 2936 } 2937 2938 /* 2939 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2940 * anything except sleeping. This function is used to check the status of 2941 * the fs. 2942 */ 2943 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2944 { 2945 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2946 } 2947 2948 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2949 { 2950 kfree(fs_info->balance_ctl); 2951 kfree(fs_info->delayed_root); 2952 kfree(fs_info->extent_root); 2953 kfree(fs_info->tree_root); 2954 kfree(fs_info->chunk_root); 2955 kfree(fs_info->dev_root); 2956 kfree(fs_info->csum_root); 2957 kfree(fs_info->quota_root); 2958 kfree(fs_info->uuid_root); 2959 kfree(fs_info->free_space_root); 2960 kfree(fs_info->super_copy); 2961 kfree(fs_info->super_for_commit); 2962 security_free_mnt_opts(&fs_info->security_opts); 2963 kvfree(fs_info); 2964 } 2965 2966 /* tree mod log functions from ctree.c */ 2967 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2968 struct seq_list *elem); 2969 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2970 struct seq_list *elem); 2971 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2972 2973 /* root-item.c */ 2974 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2975 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2976 int name_len); 2977 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2978 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2979 int name_len); 2980 int btrfs_del_root(struct btrfs_trans_handle *trans, 2981 const struct btrfs_key *key); 2982 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2983 const struct btrfs_key *key, 2984 struct btrfs_root_item *item); 2985 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2986 struct btrfs_root *root, 2987 struct btrfs_key *key, 2988 struct btrfs_root_item *item); 2989 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2990 struct btrfs_path *path, struct btrfs_root_item *root_item, 2991 struct btrfs_key *root_key); 2992 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2993 void btrfs_set_root_node(struct btrfs_root_item *item, 2994 struct extent_buffer *node); 2995 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2996 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2997 struct btrfs_root *root); 2998 2999 /* uuid-tree.c */ 3000 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3001 u64 subid); 3002 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3003 u64 subid); 3004 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3005 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3006 u64)); 3007 3008 /* dir-item.c */ 3009 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3010 const char *name, int name_len); 3011 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 3012 int name_len, struct btrfs_inode *dir, 3013 struct btrfs_key *location, u8 type, u64 index); 3014 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3015 struct btrfs_root *root, 3016 struct btrfs_path *path, u64 dir, 3017 const char *name, int name_len, 3018 int mod); 3019 struct btrfs_dir_item * 3020 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3021 struct btrfs_root *root, 3022 struct btrfs_path *path, u64 dir, 3023 u64 objectid, const char *name, int name_len, 3024 int mod); 3025 struct btrfs_dir_item * 3026 btrfs_search_dir_index_item(struct btrfs_root *root, 3027 struct btrfs_path *path, u64 dirid, 3028 const char *name, int name_len); 3029 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3030 struct btrfs_root *root, 3031 struct btrfs_path *path, 3032 struct btrfs_dir_item *di); 3033 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3034 struct btrfs_root *root, 3035 struct btrfs_path *path, u64 objectid, 3036 const char *name, u16 name_len, 3037 const void *data, u16 data_len); 3038 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3039 struct btrfs_root *root, 3040 struct btrfs_path *path, u64 dir, 3041 const char *name, u16 name_len, 3042 int mod); 3043 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3044 struct btrfs_path *path, 3045 const char *name, 3046 int name_len); 3047 3048 /* orphan.c */ 3049 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3050 struct btrfs_root *root, u64 offset); 3051 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3052 struct btrfs_root *root, u64 offset); 3053 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3054 3055 /* inode-item.c */ 3056 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3057 struct btrfs_root *root, 3058 const char *name, int name_len, 3059 u64 inode_objectid, u64 ref_objectid, u64 index); 3060 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3061 struct btrfs_root *root, 3062 const char *name, int name_len, 3063 u64 inode_objectid, u64 ref_objectid, u64 *index); 3064 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3065 struct btrfs_root *root, 3066 struct btrfs_path *path, u64 objectid); 3067 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3068 *root, struct btrfs_path *path, 3069 struct btrfs_key *location, int mod); 3070 3071 struct btrfs_inode_extref * 3072 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3073 struct btrfs_root *root, 3074 struct btrfs_path *path, 3075 const char *name, int name_len, 3076 u64 inode_objectid, u64 ref_objectid, int ins_len, 3077 int cow); 3078 3079 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3080 const char *name, 3081 int name_len, struct btrfs_inode_ref **ref_ret); 3082 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3083 u64 ref_objectid, const char *name, 3084 int name_len, 3085 struct btrfs_inode_extref **extref_ret); 3086 3087 /* file-item.c */ 3088 struct btrfs_dio_private; 3089 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3090 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3091 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3092 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3093 u64 logical_offset); 3094 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3095 struct btrfs_root *root, 3096 u64 objectid, u64 pos, 3097 u64 disk_offset, u64 disk_num_bytes, 3098 u64 num_bytes, u64 offset, u64 ram_bytes, 3099 u8 compression, u8 encryption, u16 other_encoding); 3100 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3101 struct btrfs_root *root, 3102 struct btrfs_path *path, u64 objectid, 3103 u64 bytenr, int mod); 3104 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3105 struct btrfs_root *root, 3106 struct btrfs_ordered_sum *sums); 3107 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3108 u64 file_start, int contig); 3109 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3110 struct list_head *list, int search_commit); 3111 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3112 const struct btrfs_path *path, 3113 struct btrfs_file_extent_item *fi, 3114 const bool new_inline, 3115 struct extent_map *em); 3116 3117 /* inode.c */ 3118 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3119 struct page *page, size_t pg_offset, u64 start, 3120 u64 len, int create); 3121 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3122 u64 *orig_start, u64 *orig_block_len, 3123 u64 *ram_bytes); 3124 3125 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3126 struct btrfs_inode *inode); 3127 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3128 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3129 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3130 struct btrfs_root *root, 3131 struct btrfs_inode *dir, struct btrfs_inode *inode, 3132 const char *name, int name_len); 3133 int btrfs_add_link(struct btrfs_trans_handle *trans, 3134 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3135 const char *name, int name_len, int add_backref, u64 index); 3136 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3137 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3138 int front); 3139 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3140 struct btrfs_root *root, 3141 struct inode *inode, u64 new_size, 3142 u32 min_type); 3143 3144 int btrfs_start_delalloc_inodes(struct btrfs_root *root); 3145 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3146 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3147 unsigned int extra_bits, 3148 struct extent_state **cached_state, int dedupe); 3149 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3150 struct btrfs_root *new_root, 3151 struct btrfs_root *parent_root, 3152 u64 new_dirid); 3153 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3154 size_t size, struct bio *bio, 3155 unsigned long bio_flags); 3156 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3157 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3158 int btrfs_readpage(struct file *file, struct page *page); 3159 void btrfs_evict_inode(struct inode *inode); 3160 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3161 struct inode *btrfs_alloc_inode(struct super_block *sb); 3162 void btrfs_destroy_inode(struct inode *inode); 3163 int btrfs_drop_inode(struct inode *inode); 3164 int __init btrfs_init_cachep(void); 3165 void __cold btrfs_destroy_cachep(void); 3166 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3167 struct btrfs_root *root, int *was_new); 3168 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3169 struct page *page, size_t pg_offset, 3170 u64 start, u64 end, int create); 3171 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3172 struct btrfs_root *root, 3173 struct inode *inode); 3174 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3175 struct btrfs_root *root, struct inode *inode); 3176 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3177 struct btrfs_inode *inode); 3178 int btrfs_orphan_cleanup(struct btrfs_root *root); 3179 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3180 void btrfs_add_delayed_iput(struct inode *inode); 3181 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3182 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3183 u64 start, u64 num_bytes, u64 min_size, 3184 loff_t actual_len, u64 *alloc_hint); 3185 int btrfs_prealloc_file_range_trans(struct inode *inode, 3186 struct btrfs_trans_handle *trans, int mode, 3187 u64 start, u64 num_bytes, u64 min_size, 3188 loff_t actual_len, u64 *alloc_hint); 3189 extern const struct dentry_operations btrfs_dentry_operations; 3190 3191 /* ioctl.c */ 3192 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3193 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3194 int btrfs_ioctl_get_supported_features(void __user *arg); 3195 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3196 int btrfs_is_empty_uuid(u8 *uuid); 3197 int btrfs_defrag_file(struct inode *inode, struct file *file, 3198 struct btrfs_ioctl_defrag_range_args *range, 3199 u64 newer_than, unsigned long max_pages); 3200 void btrfs_get_block_group_info(struct list_head *groups_list, 3201 struct btrfs_ioctl_space_info *space); 3202 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3203 struct btrfs_ioctl_balance_args *bargs); 3204 3205 /* file.c */ 3206 int __init btrfs_auto_defrag_init(void); 3207 void __cold btrfs_auto_defrag_exit(void); 3208 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3209 struct btrfs_inode *inode); 3210 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3211 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3212 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3213 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3214 int skip_pinned); 3215 extern const struct file_operations btrfs_file_operations; 3216 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3217 struct btrfs_root *root, struct inode *inode, 3218 struct btrfs_path *path, u64 start, u64 end, 3219 u64 *drop_end, int drop_cache, 3220 int replace_extent, 3221 u32 extent_item_size, 3222 int *key_inserted); 3223 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3224 struct btrfs_root *root, struct inode *inode, u64 start, 3225 u64 end, int drop_cache); 3226 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3227 struct btrfs_inode *inode, u64 start, u64 end); 3228 int btrfs_release_file(struct inode *inode, struct file *file); 3229 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3230 size_t num_pages, loff_t pos, size_t write_bytes, 3231 struct extent_state **cached); 3232 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3233 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 3234 struct file *file_out, loff_t pos_out, 3235 loff_t len, unsigned int remap_flags); 3236 3237 /* tree-defrag.c */ 3238 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3239 struct btrfs_root *root); 3240 3241 /* sysfs.c */ 3242 int __init btrfs_init_sysfs(void); 3243 void __cold btrfs_exit_sysfs(void); 3244 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3245 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3246 3247 /* super.c */ 3248 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3249 unsigned long new_flags); 3250 int btrfs_sync_fs(struct super_block *sb, int wait); 3251 3252 static inline __printf(2, 3) __cold 3253 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3254 { 3255 } 3256 3257 #ifdef CONFIG_PRINTK 3258 __printf(2, 3) 3259 __cold 3260 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3261 #else 3262 #define btrfs_printk(fs_info, fmt, args...) \ 3263 btrfs_no_printk(fs_info, fmt, ##args) 3264 #endif 3265 3266 #define btrfs_emerg(fs_info, fmt, args...) \ 3267 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3268 #define btrfs_alert(fs_info, fmt, args...) \ 3269 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3270 #define btrfs_crit(fs_info, fmt, args...) \ 3271 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3272 #define btrfs_err(fs_info, fmt, args...) \ 3273 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3274 #define btrfs_warn(fs_info, fmt, args...) \ 3275 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3276 #define btrfs_notice(fs_info, fmt, args...) \ 3277 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3278 #define btrfs_info(fs_info, fmt, args...) \ 3279 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3280 3281 /* 3282 * Wrappers that use printk_in_rcu 3283 */ 3284 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3285 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3286 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3287 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3288 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3289 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3290 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3291 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3292 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3293 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3294 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3295 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3296 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3297 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3298 3299 /* 3300 * Wrappers that use a ratelimited printk_in_rcu 3301 */ 3302 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3303 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3304 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3305 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3306 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3307 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3308 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3309 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3310 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3311 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3312 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3313 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3314 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3315 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3316 3317 /* 3318 * Wrappers that use a ratelimited printk 3319 */ 3320 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3321 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3322 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3323 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3324 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3325 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3326 #define btrfs_err_rl(fs_info, fmt, args...) \ 3327 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3328 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3329 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3330 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3331 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3332 #define btrfs_info_rl(fs_info, fmt, args...) \ 3333 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3334 3335 #if defined(CONFIG_DYNAMIC_DEBUG) 3336 #define btrfs_debug(fs_info, fmt, args...) \ 3337 do { \ 3338 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3339 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3340 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3341 } while (0) 3342 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3343 do { \ 3344 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3345 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3346 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3347 } while (0) 3348 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3349 do { \ 3350 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3351 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3352 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3353 ##args);\ 3354 } while (0) 3355 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3356 do { \ 3357 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3358 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3359 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3360 ##args); \ 3361 } while (0) 3362 #elif defined(DEBUG) 3363 #define btrfs_debug(fs_info, fmt, args...) \ 3364 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3365 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3366 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3367 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3368 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3369 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3370 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3371 #else 3372 #define btrfs_debug(fs_info, fmt, args...) \ 3373 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3374 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3375 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3376 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3377 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3378 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3379 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3380 #endif 3381 3382 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3383 do { \ 3384 rcu_read_lock(); \ 3385 btrfs_printk(fs_info, fmt, ##args); \ 3386 rcu_read_unlock(); \ 3387 } while (0) 3388 3389 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3390 do { \ 3391 rcu_read_lock(); \ 3392 btrfs_no_printk(fs_info, fmt, ##args); \ 3393 rcu_read_unlock(); \ 3394 } while (0) 3395 3396 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3397 do { \ 3398 static DEFINE_RATELIMIT_STATE(_rs, \ 3399 DEFAULT_RATELIMIT_INTERVAL, \ 3400 DEFAULT_RATELIMIT_BURST); \ 3401 if (__ratelimit(&_rs)) \ 3402 btrfs_printk(fs_info, fmt, ##args); \ 3403 } while (0) 3404 3405 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3406 do { \ 3407 rcu_read_lock(); \ 3408 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3409 rcu_read_unlock(); \ 3410 } while (0) 3411 3412 #ifdef CONFIG_BTRFS_ASSERT 3413 3414 __cold 3415 static inline void assfail(const char *expr, const char *file, int line) 3416 { 3417 pr_err("assertion failed: %s, file: %s, line: %d\n", 3418 expr, file, line); 3419 BUG(); 3420 } 3421 3422 #define ASSERT(expr) \ 3423 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3424 #else 3425 #define ASSERT(expr) ((void)0) 3426 #endif 3427 3428 __cold 3429 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3430 { 3431 btrfs_err(fs_info, 3432 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3433 } 3434 3435 __printf(5, 6) 3436 __cold 3437 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3438 unsigned int line, int errno, const char *fmt, ...); 3439 3440 const char *btrfs_decode_error(int errno); 3441 3442 __cold 3443 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3444 const char *function, 3445 unsigned int line, int errno); 3446 3447 /* 3448 * Call btrfs_abort_transaction as early as possible when an error condition is 3449 * detected, that way the exact line number is reported. 3450 */ 3451 #define btrfs_abort_transaction(trans, errno) \ 3452 do { \ 3453 /* Report first abort since mount */ \ 3454 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3455 &((trans)->fs_info->fs_state))) { \ 3456 if ((errno) != -EIO) { \ 3457 WARN(1, KERN_DEBUG \ 3458 "BTRFS: Transaction aborted (error %d)\n", \ 3459 (errno)); \ 3460 } else { \ 3461 btrfs_debug((trans)->fs_info, \ 3462 "Transaction aborted (error %d)", \ 3463 (errno)); \ 3464 } \ 3465 } \ 3466 __btrfs_abort_transaction((trans), __func__, \ 3467 __LINE__, (errno)); \ 3468 } while (0) 3469 3470 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3471 do { \ 3472 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3473 (errno), fmt, ##args); \ 3474 } while (0) 3475 3476 __printf(5, 6) 3477 __cold 3478 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3479 unsigned int line, int errno, const char *fmt, ...); 3480 /* 3481 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3482 * will panic(). Otherwise we BUG() here. 3483 */ 3484 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3485 do { \ 3486 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3487 BUG(); \ 3488 } while (0) 3489 3490 3491 /* compatibility and incompatibility defines */ 3492 3493 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3494 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3495 3496 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3497 u64 flag) 3498 { 3499 struct btrfs_super_block *disk_super; 3500 u64 features; 3501 3502 disk_super = fs_info->super_copy; 3503 features = btrfs_super_incompat_flags(disk_super); 3504 if (!(features & flag)) { 3505 spin_lock(&fs_info->super_lock); 3506 features = btrfs_super_incompat_flags(disk_super); 3507 if (!(features & flag)) { 3508 features |= flag; 3509 btrfs_set_super_incompat_flags(disk_super, features); 3510 btrfs_info(fs_info, "setting %llu feature flag", 3511 flag); 3512 } 3513 spin_unlock(&fs_info->super_lock); 3514 } 3515 } 3516 3517 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3518 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3519 3520 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3521 u64 flag) 3522 { 3523 struct btrfs_super_block *disk_super; 3524 u64 features; 3525 3526 disk_super = fs_info->super_copy; 3527 features = btrfs_super_incompat_flags(disk_super); 3528 if (features & flag) { 3529 spin_lock(&fs_info->super_lock); 3530 features = btrfs_super_incompat_flags(disk_super); 3531 if (features & flag) { 3532 features &= ~flag; 3533 btrfs_set_super_incompat_flags(disk_super, features); 3534 btrfs_info(fs_info, "clearing %llu feature flag", 3535 flag); 3536 } 3537 spin_unlock(&fs_info->super_lock); 3538 } 3539 } 3540 3541 #define btrfs_fs_incompat(fs_info, opt) \ 3542 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3543 3544 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3545 { 3546 struct btrfs_super_block *disk_super; 3547 disk_super = fs_info->super_copy; 3548 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3549 } 3550 3551 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3552 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3553 3554 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3555 u64 flag) 3556 { 3557 struct btrfs_super_block *disk_super; 3558 u64 features; 3559 3560 disk_super = fs_info->super_copy; 3561 features = btrfs_super_compat_ro_flags(disk_super); 3562 if (!(features & flag)) { 3563 spin_lock(&fs_info->super_lock); 3564 features = btrfs_super_compat_ro_flags(disk_super); 3565 if (!(features & flag)) { 3566 features |= flag; 3567 btrfs_set_super_compat_ro_flags(disk_super, features); 3568 btrfs_info(fs_info, "setting %llu ro feature flag", 3569 flag); 3570 } 3571 spin_unlock(&fs_info->super_lock); 3572 } 3573 } 3574 3575 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3576 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3577 3578 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3579 u64 flag) 3580 { 3581 struct btrfs_super_block *disk_super; 3582 u64 features; 3583 3584 disk_super = fs_info->super_copy; 3585 features = btrfs_super_compat_ro_flags(disk_super); 3586 if (features & flag) { 3587 spin_lock(&fs_info->super_lock); 3588 features = btrfs_super_compat_ro_flags(disk_super); 3589 if (features & flag) { 3590 features &= ~flag; 3591 btrfs_set_super_compat_ro_flags(disk_super, features); 3592 btrfs_info(fs_info, "clearing %llu ro feature flag", 3593 flag); 3594 } 3595 spin_unlock(&fs_info->super_lock); 3596 } 3597 } 3598 3599 #define btrfs_fs_compat_ro(fs_info, opt) \ 3600 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3601 3602 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3603 { 3604 struct btrfs_super_block *disk_super; 3605 disk_super = fs_info->super_copy; 3606 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3607 } 3608 3609 /* acl.c */ 3610 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3611 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3612 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3613 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3614 struct inode *inode, struct inode *dir); 3615 #else 3616 #define btrfs_get_acl NULL 3617 #define btrfs_set_acl NULL 3618 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3619 struct inode *inode, struct inode *dir) 3620 { 3621 return 0; 3622 } 3623 #endif 3624 3625 /* relocation.c */ 3626 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3627 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3628 struct btrfs_root *root); 3629 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3630 struct btrfs_root *root); 3631 int btrfs_recover_relocation(struct btrfs_root *root); 3632 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3633 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3634 struct btrfs_root *root, struct extent_buffer *buf, 3635 struct extent_buffer *cow); 3636 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3637 u64 *bytes_to_reserve); 3638 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3639 struct btrfs_pending_snapshot *pending); 3640 3641 /* scrub.c */ 3642 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3643 u64 end, struct btrfs_scrub_progress *progress, 3644 int readonly, int is_dev_replace); 3645 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3646 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3647 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3648 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3649 struct btrfs_device *dev); 3650 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3651 struct btrfs_scrub_progress *progress); 3652 static inline void btrfs_init_full_stripe_locks_tree( 3653 struct btrfs_full_stripe_locks_tree *locks_root) 3654 { 3655 locks_root->root = RB_ROOT; 3656 mutex_init(&locks_root->lock); 3657 } 3658 3659 /* dev-replace.c */ 3660 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3661 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3662 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3663 3664 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3665 { 3666 btrfs_bio_counter_sub(fs_info, 1); 3667 } 3668 3669 /* reada.c */ 3670 struct reada_control { 3671 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3672 struct btrfs_key key_start; 3673 struct btrfs_key key_end; /* exclusive */ 3674 atomic_t elems; 3675 struct kref refcnt; 3676 wait_queue_head_t wait; 3677 }; 3678 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3679 struct btrfs_key *start, struct btrfs_key *end); 3680 int btrfs_reada_wait(void *handle); 3681 void btrfs_reada_detach(void *handle); 3682 int btree_readahead_hook(struct extent_buffer *eb, int err); 3683 3684 static inline int is_fstree(u64 rootid) 3685 { 3686 if (rootid == BTRFS_FS_TREE_OBJECTID || 3687 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3688 !btrfs_qgroup_level(rootid))) 3689 return 1; 3690 return 0; 3691 } 3692 3693 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3694 { 3695 return signal_pending(current); 3696 } 3697 3698 /* Sanity test specific functions */ 3699 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3700 void btrfs_test_inode_set_ops(struct inode *inode); 3701 void btrfs_test_destroy_inode(struct inode *inode); 3702 3703 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3704 { 3705 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3706 } 3707 #else 3708 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3709 { 3710 return 0; 3711 } 3712 #endif 3713 3714 static inline void cond_wake_up(struct wait_queue_head *wq) 3715 { 3716 /* 3717 * This implies a full smp_mb barrier, see comments for 3718 * waitqueue_active why. 3719 */ 3720 if (wq_has_sleeper(wq)) 3721 wake_up(wq); 3722 } 3723 3724 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3725 { 3726 /* 3727 * Special case for conditional wakeup where the barrier required for 3728 * waitqueue_active is implied by some of the preceding code. Eg. one 3729 * of such atomic operations (atomic_dec_and_return, ...), or a 3730 * unlock/lock sequence, etc. 3731 */ 3732 if (waitqueue_active(wq)) 3733 wake_up(wq); 3734 } 3735 3736 #endif 3737