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 struct btrfs_delayed_ref_root; 39 extern struct kmem_cache *btrfs_trans_handle_cachep; 40 extern struct kmem_cache *btrfs_bit_radix_cachep; 41 extern struct kmem_cache *btrfs_path_cachep; 42 extern struct kmem_cache *btrfs_free_space_cachep; 43 struct btrfs_ordered_sum; 44 struct btrfs_ref; 45 46 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 47 48 #define BTRFS_MAX_MIRRORS 3 49 50 #define BTRFS_MAX_LEVEL 8 51 52 #define BTRFS_OLDEST_GENERATION 0ULL 53 54 /* 55 * the max metadata block size. This limit is somewhat artificial, 56 * but the memmove costs go through the roof for larger blocks. 57 */ 58 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 59 60 /* 61 * we can actually store much bigger names, but lets not confuse the rest 62 * of linux 63 */ 64 #define BTRFS_NAME_LEN 255 65 66 /* 67 * Theoretical limit is larger, but we keep this down to a sane 68 * value. That should limit greatly the possibility of collisions on 69 * inode ref items. 70 */ 71 #define BTRFS_LINK_MAX 65535U 72 73 /* four bytes for CRC32 */ 74 static const int btrfs_csum_sizes[] = { 4 }; 75 76 #define BTRFS_EMPTY_DIR_SIZE 0 77 78 /* ioprio of readahead is set to idle */ 79 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 80 81 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 82 83 /* 84 * Use large batch size to reduce overhead of metadata updates. On the reader 85 * side, we only read it when we are close to ENOSPC and the read overhead is 86 * mostly related to the number of CPUs, so it is OK to use arbitrary large 87 * value here. 88 */ 89 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 90 91 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 92 93 94 /* 95 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 96 */ 97 static inline u32 count_max_extents(u64 size) 98 { 99 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 100 } 101 102 struct btrfs_mapping_tree { 103 struct extent_map_tree map_tree; 104 }; 105 106 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 107 { 108 BUG_ON(num_stripes == 0); 109 return sizeof(struct btrfs_chunk) + 110 sizeof(struct btrfs_stripe) * (num_stripes - 1); 111 } 112 113 /* 114 * Runtime (in-memory) states of filesystem 115 */ 116 enum { 117 /* Global indicator of serious filesystem errors */ 118 BTRFS_FS_STATE_ERROR, 119 /* 120 * Filesystem is being remounted, allow to skip some operations, like 121 * defrag 122 */ 123 BTRFS_FS_STATE_REMOUNTING, 124 /* Track if a transaction abort has been reported on this filesystem */ 125 BTRFS_FS_STATE_TRANS_ABORTED, 126 /* 127 * Bio operations should be blocked on this filesystem because a source 128 * or target device is being destroyed as part of a device replace 129 */ 130 BTRFS_FS_STATE_DEV_REPLACING, 131 /* The btrfs_fs_info created for self-tests */ 132 BTRFS_FS_STATE_DUMMY_FS_INFO, 133 }; 134 135 #define BTRFS_BACKREF_REV_MAX 256 136 #define BTRFS_BACKREF_REV_SHIFT 56 137 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 138 BTRFS_BACKREF_REV_SHIFT) 139 140 #define BTRFS_OLD_BACKREF_REV 0 141 #define BTRFS_MIXED_BACKREF_REV 1 142 143 /* 144 * every tree block (leaf or node) starts with this header. 145 */ 146 struct btrfs_header { 147 /* these first four must match the super block */ 148 u8 csum[BTRFS_CSUM_SIZE]; 149 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 150 __le64 bytenr; /* which block this node is supposed to live in */ 151 __le64 flags; 152 153 /* allowed to be different from the super from here on down */ 154 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 155 __le64 generation; 156 __le64 owner; 157 __le32 nritems; 158 u8 level; 159 } __attribute__ ((__packed__)); 160 161 /* 162 * this is a very generous portion of the super block, giving us 163 * room to translate 14 chunks with 3 stripes each. 164 */ 165 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 166 167 /* 168 * just in case we somehow lose the roots and are not able to mount, 169 * we store an array of the roots from previous transactions 170 * in the super. 171 */ 172 #define BTRFS_NUM_BACKUP_ROOTS 4 173 struct btrfs_root_backup { 174 __le64 tree_root; 175 __le64 tree_root_gen; 176 177 __le64 chunk_root; 178 __le64 chunk_root_gen; 179 180 __le64 extent_root; 181 __le64 extent_root_gen; 182 183 __le64 fs_root; 184 __le64 fs_root_gen; 185 186 __le64 dev_root; 187 __le64 dev_root_gen; 188 189 __le64 csum_root; 190 __le64 csum_root_gen; 191 192 __le64 total_bytes; 193 __le64 bytes_used; 194 __le64 num_devices; 195 /* future */ 196 __le64 unused_64[4]; 197 198 u8 tree_root_level; 199 u8 chunk_root_level; 200 u8 extent_root_level; 201 u8 fs_root_level; 202 u8 dev_root_level; 203 u8 csum_root_level; 204 /* future and to align */ 205 u8 unused_8[10]; 206 } __attribute__ ((__packed__)); 207 208 /* 209 * the super block basically lists the main trees of the FS 210 * it currently lacks any block count etc etc 211 */ 212 struct btrfs_super_block { 213 /* the first 4 fields must match struct btrfs_header */ 214 u8 csum[BTRFS_CSUM_SIZE]; 215 /* FS specific UUID, visible to user */ 216 u8 fsid[BTRFS_FSID_SIZE]; 217 __le64 bytenr; /* this block number */ 218 __le64 flags; 219 220 /* allowed to be different from the btrfs_header from here own down */ 221 __le64 magic; 222 __le64 generation; 223 __le64 root; 224 __le64 chunk_root; 225 __le64 log_root; 226 227 /* this will help find the new super based on the log root */ 228 __le64 log_root_transid; 229 __le64 total_bytes; 230 __le64 bytes_used; 231 __le64 root_dir_objectid; 232 __le64 num_devices; 233 __le32 sectorsize; 234 __le32 nodesize; 235 __le32 __unused_leafsize; 236 __le32 stripesize; 237 __le32 sys_chunk_array_size; 238 __le64 chunk_root_generation; 239 __le64 compat_flags; 240 __le64 compat_ro_flags; 241 __le64 incompat_flags; 242 __le16 csum_type; 243 u8 root_level; 244 u8 chunk_root_level; 245 u8 log_root_level; 246 struct btrfs_dev_item dev_item; 247 248 char label[BTRFS_LABEL_SIZE]; 249 250 __le64 cache_generation; 251 __le64 uuid_tree_generation; 252 253 /* the UUID written into btree blocks */ 254 u8 metadata_uuid[BTRFS_FSID_SIZE]; 255 256 /* future expansion */ 257 __le64 reserved[28]; 258 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 259 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 260 } __attribute__ ((__packed__)); 261 262 /* 263 * Compat flags that we support. If any incompat flags are set other than the 264 * ones specified below then we will fail to mount 265 */ 266 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 267 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 268 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 269 270 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 271 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 272 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 273 274 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 275 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 276 277 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 278 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 279 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 280 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 281 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 282 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 283 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 284 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 285 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 286 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 287 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 288 BTRFS_FEATURE_INCOMPAT_METADATA_UUID) 289 290 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 291 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 292 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 293 294 /* 295 * A leaf is full of items. offset and size tell us where to find 296 * the item in the leaf (relative to the start of the data area) 297 */ 298 struct btrfs_item { 299 struct btrfs_disk_key key; 300 __le32 offset; 301 __le32 size; 302 } __attribute__ ((__packed__)); 303 304 /* 305 * leaves have an item area and a data area: 306 * [item0, item1....itemN] [free space] [dataN...data1, data0] 307 * 308 * The data is separate from the items to get the keys closer together 309 * during searches. 310 */ 311 struct btrfs_leaf { 312 struct btrfs_header header; 313 struct btrfs_item items[]; 314 } __attribute__ ((__packed__)); 315 316 /* 317 * all non-leaf blocks are nodes, they hold only keys and pointers to 318 * other blocks 319 */ 320 struct btrfs_key_ptr { 321 struct btrfs_disk_key key; 322 __le64 blockptr; 323 __le64 generation; 324 } __attribute__ ((__packed__)); 325 326 struct btrfs_node { 327 struct btrfs_header header; 328 struct btrfs_key_ptr ptrs[]; 329 } __attribute__ ((__packed__)); 330 331 /* 332 * btrfs_paths remember the path taken from the root down to the leaf. 333 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 334 * to any other levels that are present. 335 * 336 * The slots array records the index of the item or block pointer 337 * used while walking the tree. 338 */ 339 enum { READA_NONE, READA_BACK, READA_FORWARD }; 340 struct btrfs_path { 341 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 342 int slots[BTRFS_MAX_LEVEL]; 343 /* if there is real range locking, this locks field will change */ 344 u8 locks[BTRFS_MAX_LEVEL]; 345 u8 reada; 346 /* keep some upper locks as we walk down */ 347 u8 lowest_level; 348 349 /* 350 * set by btrfs_split_item, tells search_slot to keep all locks 351 * and to force calls to keep space in the nodes 352 */ 353 unsigned int search_for_split:1; 354 unsigned int keep_locks:1; 355 unsigned int skip_locking:1; 356 unsigned int leave_spinning:1; 357 unsigned int search_commit_root:1; 358 unsigned int need_commit_sem:1; 359 unsigned int skip_release_on_error:1; 360 }; 361 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 362 sizeof(struct btrfs_item)) 363 struct btrfs_dev_replace { 364 u64 replace_state; /* see #define above */ 365 time64_t time_started; /* seconds since 1-Jan-1970 */ 366 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 367 atomic64_t num_write_errors; 368 atomic64_t num_uncorrectable_read_errors; 369 370 u64 cursor_left; 371 u64 committed_cursor_left; 372 u64 cursor_left_last_write_of_item; 373 u64 cursor_right; 374 375 u64 cont_reading_from_srcdev_mode; /* see #define above */ 376 377 int is_valid; 378 int item_needs_writeback; 379 struct btrfs_device *srcdev; 380 struct btrfs_device *tgtdev; 381 382 struct mutex lock_finishing_cancel_unmount; 383 struct rw_semaphore rwsem; 384 385 struct btrfs_scrub_progress scrub_progress; 386 387 struct percpu_counter bio_counter; 388 wait_queue_head_t replace_wait; 389 }; 390 391 /* For raid type sysfs entries */ 392 struct raid_kobject { 393 u64 flags; 394 struct kobject kobj; 395 struct list_head list; 396 }; 397 398 struct btrfs_space_info { 399 spinlock_t lock; 400 401 u64 total_bytes; /* total bytes in the space, 402 this doesn't take mirrors into account */ 403 u64 bytes_used; /* total bytes used, 404 this doesn't take mirrors into account */ 405 u64 bytes_pinned; /* total bytes pinned, will be freed when the 406 transaction finishes */ 407 u64 bytes_reserved; /* total bytes the allocator has reserved for 408 current allocations */ 409 u64 bytes_may_use; /* number of bytes that may be used for 410 delalloc/allocations */ 411 u64 bytes_readonly; /* total bytes that are read only */ 412 413 u64 max_extent_size; /* This will hold the maximum extent size of 414 the space info if we had an ENOSPC in the 415 allocator. */ 416 417 unsigned int full:1; /* indicates that we cannot allocate any more 418 chunks for this space */ 419 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 420 421 unsigned int flush:1; /* set if we are trying to make space */ 422 423 unsigned int force_alloc; /* set if we need to force a chunk 424 alloc for this space */ 425 426 u64 disk_used; /* total bytes used on disk */ 427 u64 disk_total; /* total bytes on disk, takes mirrors into 428 account */ 429 430 u64 flags; 431 432 /* 433 * bytes_pinned is kept in line with what is actually pinned, as in 434 * we've called update_block_group and dropped the bytes_used counter 435 * and increased the bytes_pinned counter. However this means that 436 * bytes_pinned does not reflect the bytes that will be pinned once the 437 * delayed refs are flushed, so this counter is inc'ed every time we 438 * call btrfs_free_extent so it is a realtime count of what will be 439 * freed once the transaction is committed. It will be zeroed every 440 * time the transaction commits. 441 */ 442 struct percpu_counter total_bytes_pinned; 443 444 struct list_head list; 445 /* Protected by the spinlock 'lock'. */ 446 struct list_head ro_bgs; 447 struct list_head priority_tickets; 448 struct list_head tickets; 449 /* 450 * tickets_id just indicates the next ticket will be handled, so note 451 * it's not stored per ticket. 452 */ 453 u64 tickets_id; 454 455 struct rw_semaphore groups_sem; 456 /* for block groups in our same type */ 457 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 458 wait_queue_head_t wait; 459 460 struct kobject kobj; 461 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 462 }; 463 464 /* 465 * Types of block reserves 466 */ 467 enum { 468 BTRFS_BLOCK_RSV_GLOBAL, 469 BTRFS_BLOCK_RSV_DELALLOC, 470 BTRFS_BLOCK_RSV_TRANS, 471 BTRFS_BLOCK_RSV_CHUNK, 472 BTRFS_BLOCK_RSV_DELOPS, 473 BTRFS_BLOCK_RSV_DELREFS, 474 BTRFS_BLOCK_RSV_EMPTY, 475 BTRFS_BLOCK_RSV_TEMP, 476 }; 477 478 struct btrfs_block_rsv { 479 u64 size; 480 u64 reserved; 481 struct btrfs_space_info *space_info; 482 spinlock_t lock; 483 unsigned short full; 484 unsigned short type; 485 unsigned short failfast; 486 487 /* 488 * Qgroup equivalent for @size @reserved 489 * 490 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 491 * about things like csum size nor how many tree blocks it will need to 492 * reserve. 493 * 494 * Qgroup cares more about net change of the extent usage. 495 * 496 * So for one newly inserted file extent, in worst case it will cause 497 * leaf split and level increase, nodesize for each file extent is 498 * already too much. 499 * 500 * In short, qgroup_size/reserved is the upper limit of possible needed 501 * qgroup metadata reservation. 502 */ 503 u64 qgroup_rsv_size; 504 u64 qgroup_rsv_reserved; 505 }; 506 507 /* 508 * free clusters are used to claim free space in relatively large chunks, 509 * allowing us to do less seeky writes. They are used for all metadata 510 * allocations. In ssd_spread mode they are also used for data allocations. 511 */ 512 struct btrfs_free_cluster { 513 spinlock_t lock; 514 spinlock_t refill_lock; 515 struct rb_root root; 516 517 /* largest extent in this cluster */ 518 u64 max_size; 519 520 /* first extent starting offset */ 521 u64 window_start; 522 523 /* We did a full search and couldn't create a cluster */ 524 bool fragmented; 525 526 struct btrfs_block_group_cache *block_group; 527 /* 528 * when a cluster is allocated from a block group, we put the 529 * cluster onto a list in the block group so that it can 530 * be freed before the block group is freed. 531 */ 532 struct list_head block_group_list; 533 }; 534 535 enum btrfs_caching_type { 536 BTRFS_CACHE_NO, 537 BTRFS_CACHE_STARTED, 538 BTRFS_CACHE_FAST, 539 BTRFS_CACHE_FINISHED, 540 BTRFS_CACHE_ERROR, 541 }; 542 543 enum btrfs_disk_cache_state { 544 BTRFS_DC_WRITTEN, 545 BTRFS_DC_ERROR, 546 BTRFS_DC_CLEAR, 547 BTRFS_DC_SETUP, 548 }; 549 550 struct btrfs_caching_control { 551 struct list_head list; 552 struct mutex mutex; 553 wait_queue_head_t wait; 554 struct btrfs_work work; 555 struct btrfs_block_group_cache *block_group; 556 u64 progress; 557 refcount_t count; 558 }; 559 560 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 561 #define CACHING_CTL_WAKE_UP SZ_2M 562 563 struct btrfs_io_ctl { 564 void *cur, *orig; 565 struct page *page; 566 struct page **pages; 567 struct btrfs_fs_info *fs_info; 568 struct inode *inode; 569 unsigned long size; 570 int index; 571 int num_pages; 572 int entries; 573 int bitmaps; 574 unsigned check_crcs:1; 575 }; 576 577 /* 578 * Tree to record all locked full stripes of a RAID5/6 block group 579 */ 580 struct btrfs_full_stripe_locks_tree { 581 struct rb_root root; 582 struct mutex lock; 583 }; 584 585 struct btrfs_block_group_cache { 586 struct btrfs_key key; 587 struct btrfs_block_group_item item; 588 struct btrfs_fs_info *fs_info; 589 struct inode *inode; 590 spinlock_t lock; 591 u64 pinned; 592 u64 reserved; 593 u64 delalloc_bytes; 594 u64 bytes_super; 595 u64 flags; 596 u64 cache_generation; 597 598 /* 599 * If the free space extent count exceeds this number, convert the block 600 * group to bitmaps. 601 */ 602 u32 bitmap_high_thresh; 603 604 /* 605 * If the free space extent count drops below this number, convert the 606 * block group back to extents. 607 */ 608 u32 bitmap_low_thresh; 609 610 /* 611 * It is just used for the delayed data space allocation because 612 * only the data space allocation and the relative metadata update 613 * can be done cross the transaction. 614 */ 615 struct rw_semaphore data_rwsem; 616 617 /* for raid56, this is a full stripe, without parity */ 618 unsigned long full_stripe_len; 619 620 unsigned int ro; 621 unsigned int iref:1; 622 unsigned int has_caching_ctl:1; 623 unsigned int removed:1; 624 625 int disk_cache_state; 626 627 /* cache tracking stuff */ 628 int cached; 629 struct btrfs_caching_control *caching_ctl; 630 u64 last_byte_to_unpin; 631 632 struct btrfs_space_info *space_info; 633 634 /* free space cache stuff */ 635 struct btrfs_free_space_ctl *free_space_ctl; 636 637 /* block group cache stuff */ 638 struct rb_node cache_node; 639 640 /* for block groups in the same raid type */ 641 struct list_head list; 642 643 /* usage count */ 644 atomic_t count; 645 646 /* List of struct btrfs_free_clusters for this block group. 647 * Today it will only have one thing on it, but that may change 648 */ 649 struct list_head cluster_list; 650 651 /* For delayed block group creation or deletion of empty block groups */ 652 struct list_head bg_list; 653 654 /* For read-only block groups */ 655 struct list_head ro_list; 656 657 atomic_t trimming; 658 659 /* For dirty block groups */ 660 struct list_head dirty_list; 661 struct list_head io_list; 662 663 struct btrfs_io_ctl io_ctl; 664 665 /* 666 * Incremented when doing extent allocations and holding a read lock 667 * on the space_info's groups_sem semaphore. 668 * Decremented when an ordered extent that represents an IO against this 669 * block group's range is created (after it's added to its inode's 670 * root's list of ordered extents) or immediately after the allocation 671 * if it's a metadata extent or fallocate extent (for these cases we 672 * don't create ordered extents). 673 */ 674 atomic_t reservations; 675 676 /* 677 * Incremented while holding the spinlock *lock* by a task checking if 678 * it can perform a nocow write (incremented if the value for the *ro* 679 * field is 0). Decremented by such tasks once they create an ordered 680 * extent or before that if some error happens before reaching that step. 681 * This is to prevent races between block group relocation and nocow 682 * writes through direct IO. 683 */ 684 atomic_t nocow_writers; 685 686 /* Lock for free space tree operations. */ 687 struct mutex free_space_lock; 688 689 /* 690 * Does the block group need to be added to the free space tree? 691 * Protected by free_space_lock. 692 */ 693 int needs_free_space; 694 695 /* Record locked full stripes for RAID5/6 block group */ 696 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 697 }; 698 699 /* delayed seq elem */ 700 struct seq_list { 701 struct list_head list; 702 u64 seq; 703 }; 704 705 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 706 707 #define SEQ_LAST ((u64)-1) 708 709 enum btrfs_orphan_cleanup_state { 710 ORPHAN_CLEANUP_STARTED = 1, 711 ORPHAN_CLEANUP_DONE = 2, 712 }; 713 714 /* used by the raid56 code to lock stripes for read/modify/write */ 715 struct btrfs_stripe_hash { 716 struct list_head hash_list; 717 spinlock_t lock; 718 }; 719 720 /* used by the raid56 code to lock stripes for read/modify/write */ 721 struct btrfs_stripe_hash_table { 722 struct list_head stripe_cache; 723 spinlock_t cache_lock; 724 int cache_size; 725 struct btrfs_stripe_hash table[]; 726 }; 727 728 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 729 730 void btrfs_init_async_reclaim_work(struct work_struct *work); 731 732 /* fs_info */ 733 struct reloc_control; 734 struct btrfs_device; 735 struct btrfs_fs_devices; 736 struct btrfs_balance_control; 737 struct btrfs_delayed_root; 738 739 /* 740 * Block group or device which contains an active swapfile. Used for preventing 741 * unsafe operations while a swapfile is active. 742 * 743 * These are sorted on (ptr, inode) (note that a block group or device can 744 * contain more than one swapfile). We compare the pointer values because we 745 * don't actually care what the object is, we just need a quick check whether 746 * the object exists in the rbtree. 747 */ 748 struct btrfs_swapfile_pin { 749 struct rb_node node; 750 void *ptr; 751 struct inode *inode; 752 /* 753 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise, 754 * ptr points to a struct btrfs_device. 755 */ 756 bool is_block_group; 757 }; 758 759 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 760 761 enum { 762 BTRFS_FS_BARRIER, 763 BTRFS_FS_CLOSING_START, 764 BTRFS_FS_CLOSING_DONE, 765 BTRFS_FS_LOG_RECOVERING, 766 BTRFS_FS_OPEN, 767 BTRFS_FS_QUOTA_ENABLED, 768 BTRFS_FS_UPDATE_UUID_TREE_GEN, 769 BTRFS_FS_CREATING_FREE_SPACE_TREE, 770 BTRFS_FS_BTREE_ERR, 771 BTRFS_FS_LOG1_ERR, 772 BTRFS_FS_LOG2_ERR, 773 BTRFS_FS_QUOTA_OVERRIDE, 774 /* Used to record internally whether fs has been frozen */ 775 BTRFS_FS_FROZEN, 776 /* 777 * Indicate that a whole-filesystem exclusive operation is running 778 * (device replace, resize, device add/delete, balance) 779 */ 780 BTRFS_FS_EXCL_OP, 781 /* 782 * To info transaction_kthread we need an immediate commit so it 783 * doesn't need to wait for commit_interval 784 */ 785 BTRFS_FS_NEED_ASYNC_COMMIT, 786 /* 787 * Indicate that balance has been set up from the ioctl and is in the 788 * main phase. The fs_info::balance_ctl is initialized. 789 */ 790 BTRFS_FS_BALANCE_RUNNING, 791 792 /* Indicate that the cleaner thread is awake and doing something. */ 793 BTRFS_FS_CLEANER_RUNNING, 794 }; 795 796 struct btrfs_fs_info { 797 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 798 unsigned long flags; 799 struct btrfs_root *extent_root; 800 struct btrfs_root *tree_root; 801 struct btrfs_root *chunk_root; 802 struct btrfs_root *dev_root; 803 struct btrfs_root *fs_root; 804 struct btrfs_root *csum_root; 805 struct btrfs_root *quota_root; 806 struct btrfs_root *uuid_root; 807 struct btrfs_root *free_space_root; 808 809 /* the log root tree is a directory of all the other log roots */ 810 struct btrfs_root *log_root_tree; 811 812 spinlock_t fs_roots_radix_lock; 813 struct radix_tree_root fs_roots_radix; 814 815 /* block group cache stuff */ 816 spinlock_t block_group_cache_lock; 817 u64 first_logical_byte; 818 struct rb_root block_group_cache_tree; 819 820 /* keep track of unallocated space */ 821 atomic64_t free_chunk_space; 822 823 struct extent_io_tree freed_extents[2]; 824 struct extent_io_tree *pinned_extents; 825 826 /* logical->physical extent mapping */ 827 struct btrfs_mapping_tree mapping_tree; 828 829 /* 830 * block reservation for extent, checksum, root tree and 831 * delayed dir index item 832 */ 833 struct btrfs_block_rsv global_block_rsv; 834 /* block reservation for metadata operations */ 835 struct btrfs_block_rsv trans_block_rsv; 836 /* block reservation for chunk tree */ 837 struct btrfs_block_rsv chunk_block_rsv; 838 /* block reservation for delayed operations */ 839 struct btrfs_block_rsv delayed_block_rsv; 840 /* block reservation for delayed refs */ 841 struct btrfs_block_rsv delayed_refs_rsv; 842 843 struct btrfs_block_rsv empty_block_rsv; 844 845 u64 generation; 846 u64 last_trans_committed; 847 u64 avg_delayed_ref_runtime; 848 849 /* 850 * this is updated to the current trans every time a full commit 851 * is required instead of the faster short fsync log commits 852 */ 853 u64 last_trans_log_full_commit; 854 unsigned long mount_opt; 855 /* 856 * Track requests for actions that need to be done during transaction 857 * commit (like for some mount options). 858 */ 859 unsigned long pending_changes; 860 unsigned long compress_type:4; 861 unsigned int compress_level; 862 u32 commit_interval; 863 /* 864 * It is a suggestive number, the read side is safe even it gets a 865 * wrong number because we will write out the data into a regular 866 * extent. The write side(mount/remount) is under ->s_umount lock, 867 * so it is also safe. 868 */ 869 u64 max_inline; 870 871 struct btrfs_transaction *running_transaction; 872 wait_queue_head_t transaction_throttle; 873 wait_queue_head_t transaction_wait; 874 wait_queue_head_t transaction_blocked_wait; 875 wait_queue_head_t async_submit_wait; 876 877 /* 878 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 879 * when they are updated. 880 * 881 * Because we do not clear the flags for ever, so we needn't use 882 * the lock on the read side. 883 * 884 * We also needn't use the lock when we mount the fs, because 885 * there is no other task which will update the flag. 886 */ 887 spinlock_t super_lock; 888 struct btrfs_super_block *super_copy; 889 struct btrfs_super_block *super_for_commit; 890 struct super_block *sb; 891 struct inode *btree_inode; 892 struct mutex tree_log_mutex; 893 struct mutex transaction_kthread_mutex; 894 struct mutex cleaner_mutex; 895 struct mutex chunk_mutex; 896 897 /* 898 * this is taken to make sure we don't set block groups ro after 899 * the free space cache has been allocated on them 900 */ 901 struct mutex ro_block_group_mutex; 902 903 /* this is used during read/modify/write to make sure 904 * no two ios are trying to mod the same stripe at the same 905 * time 906 */ 907 struct btrfs_stripe_hash_table *stripe_hash_table; 908 909 /* 910 * this protects the ordered operations list only while we are 911 * processing all of the entries on it. This way we make 912 * sure the commit code doesn't find the list temporarily empty 913 * because another function happens to be doing non-waiting preflush 914 * before jumping into the main commit. 915 */ 916 struct mutex ordered_operations_mutex; 917 918 struct rw_semaphore commit_root_sem; 919 920 struct rw_semaphore cleanup_work_sem; 921 922 struct rw_semaphore subvol_sem; 923 struct srcu_struct subvol_srcu; 924 925 spinlock_t trans_lock; 926 /* 927 * the reloc mutex goes with the trans lock, it is taken 928 * during commit to protect us from the relocation code 929 */ 930 struct mutex reloc_mutex; 931 932 struct list_head trans_list; 933 struct list_head dead_roots; 934 struct list_head caching_block_groups; 935 936 spinlock_t delayed_iput_lock; 937 struct list_head delayed_iputs; 938 atomic_t nr_delayed_iputs; 939 wait_queue_head_t delayed_iputs_wait; 940 941 /* this protects tree_mod_seq_list */ 942 spinlock_t tree_mod_seq_lock; 943 atomic64_t tree_mod_seq; 944 struct list_head tree_mod_seq_list; 945 946 /* this protects tree_mod_log */ 947 rwlock_t tree_mod_log_lock; 948 struct rb_root tree_mod_log; 949 950 atomic_t async_delalloc_pages; 951 952 /* 953 * this is used to protect the following list -- ordered_roots. 954 */ 955 spinlock_t ordered_root_lock; 956 957 /* 958 * all fs/file tree roots in which there are data=ordered extents 959 * pending writeback are added into this list. 960 * 961 * these can span multiple transactions and basically include 962 * every dirty data page that isn't from nodatacow 963 */ 964 struct list_head ordered_roots; 965 966 struct mutex delalloc_root_mutex; 967 spinlock_t delalloc_root_lock; 968 /* all fs/file tree roots that have delalloc inodes. */ 969 struct list_head delalloc_roots; 970 971 /* 972 * there is a pool of worker threads for checksumming during writes 973 * and a pool for checksumming after reads. This is because readers 974 * can run with FS locks held, and the writers may be waiting for 975 * those locks. We don't want ordering in the pending list to cause 976 * deadlocks, and so the two are serviced separately. 977 * 978 * A third pool does submit_bio to avoid deadlocking with the other 979 * two 980 */ 981 struct btrfs_workqueue *workers; 982 struct btrfs_workqueue *delalloc_workers; 983 struct btrfs_workqueue *flush_workers; 984 struct btrfs_workqueue *endio_workers; 985 struct btrfs_workqueue *endio_meta_workers; 986 struct btrfs_workqueue *endio_raid56_workers; 987 struct btrfs_workqueue *endio_repair_workers; 988 struct btrfs_workqueue *rmw_workers; 989 struct btrfs_workqueue *endio_meta_write_workers; 990 struct btrfs_workqueue *endio_write_workers; 991 struct btrfs_workqueue *endio_freespace_worker; 992 struct btrfs_workqueue *submit_workers; 993 struct btrfs_workqueue *caching_workers; 994 struct btrfs_workqueue *readahead_workers; 995 996 /* 997 * fixup workers take dirty pages that didn't properly go through 998 * the cow mechanism and make them safe to write. It happens 999 * for the sys_munmap function call path 1000 */ 1001 struct btrfs_workqueue *fixup_workers; 1002 struct btrfs_workqueue *delayed_workers; 1003 1004 /* the extent workers do delayed refs on the extent allocation tree */ 1005 struct btrfs_workqueue *extent_workers; 1006 struct task_struct *transaction_kthread; 1007 struct task_struct *cleaner_kthread; 1008 u32 thread_pool_size; 1009 1010 struct kobject *space_info_kobj; 1011 struct list_head pending_raid_kobjs; 1012 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 1013 1014 u64 total_pinned; 1015 1016 /* used to keep from writing metadata until there is a nice batch */ 1017 struct percpu_counter dirty_metadata_bytes; 1018 struct percpu_counter delalloc_bytes; 1019 struct percpu_counter dio_bytes; 1020 s32 dirty_metadata_batch; 1021 s32 delalloc_batch; 1022 1023 struct list_head dirty_cowonly_roots; 1024 1025 struct btrfs_fs_devices *fs_devices; 1026 1027 /* 1028 * The space_info list is effectively read only after initial 1029 * setup. It is populated at mount time and cleaned up after 1030 * all block groups are removed. RCU is used to protect it. 1031 */ 1032 struct list_head space_info; 1033 1034 struct btrfs_space_info *data_sinfo; 1035 1036 struct reloc_control *reloc_ctl; 1037 1038 /* data_alloc_cluster is only used in ssd_spread mode */ 1039 struct btrfs_free_cluster data_alloc_cluster; 1040 1041 /* all metadata allocations go through this cluster */ 1042 struct btrfs_free_cluster meta_alloc_cluster; 1043 1044 /* auto defrag inodes go here */ 1045 spinlock_t defrag_inodes_lock; 1046 struct rb_root defrag_inodes; 1047 atomic_t defrag_running; 1048 1049 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 1050 seqlock_t profiles_lock; 1051 /* 1052 * these three are in extended format (availability of single 1053 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 1054 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 1055 */ 1056 u64 avail_data_alloc_bits; 1057 u64 avail_metadata_alloc_bits; 1058 u64 avail_system_alloc_bits; 1059 1060 /* restriper state */ 1061 spinlock_t balance_lock; 1062 struct mutex balance_mutex; 1063 atomic_t balance_pause_req; 1064 atomic_t balance_cancel_req; 1065 struct btrfs_balance_control *balance_ctl; 1066 wait_queue_head_t balance_wait_q; 1067 1068 u32 data_chunk_allocations; 1069 u32 metadata_ratio; 1070 1071 void *bdev_holder; 1072 1073 /* private scrub information */ 1074 struct mutex scrub_lock; 1075 atomic_t scrubs_running; 1076 atomic_t scrub_pause_req; 1077 atomic_t scrubs_paused; 1078 atomic_t scrub_cancel_req; 1079 wait_queue_head_t scrub_pause_wait; 1080 /* 1081 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 1082 * running. 1083 */ 1084 refcount_t scrub_workers_refcnt; 1085 struct btrfs_workqueue *scrub_workers; 1086 struct btrfs_workqueue *scrub_wr_completion_workers; 1087 struct btrfs_workqueue *scrub_parity_workers; 1088 1089 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1090 u32 check_integrity_print_mask; 1091 #endif 1092 /* is qgroup tracking in a consistent state? */ 1093 u64 qgroup_flags; 1094 1095 /* holds configuration and tracking. Protected by qgroup_lock */ 1096 struct rb_root qgroup_tree; 1097 spinlock_t qgroup_lock; 1098 1099 /* 1100 * used to avoid frequently calling ulist_alloc()/ulist_free() 1101 * when doing qgroup accounting, it must be protected by qgroup_lock. 1102 */ 1103 struct ulist *qgroup_ulist; 1104 1105 /* protect user change for quota operations */ 1106 struct mutex qgroup_ioctl_lock; 1107 1108 /* list of dirty qgroups to be written at next commit */ 1109 struct list_head dirty_qgroups; 1110 1111 /* used by qgroup for an efficient tree traversal */ 1112 u64 qgroup_seq; 1113 1114 /* qgroup rescan items */ 1115 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1116 struct btrfs_key qgroup_rescan_progress; 1117 struct btrfs_workqueue *qgroup_rescan_workers; 1118 struct completion qgroup_rescan_completion; 1119 struct btrfs_work qgroup_rescan_work; 1120 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1121 1122 /* filesystem state */ 1123 unsigned long fs_state; 1124 1125 struct btrfs_delayed_root *delayed_root; 1126 1127 /* readahead tree */ 1128 spinlock_t reada_lock; 1129 struct radix_tree_root reada_tree; 1130 1131 /* readahead works cnt */ 1132 atomic_t reada_works_cnt; 1133 1134 /* Extent buffer radix tree */ 1135 spinlock_t buffer_lock; 1136 struct radix_tree_root buffer_radix; 1137 1138 /* next backup root to be overwritten */ 1139 int backup_root_index; 1140 1141 /* device replace state */ 1142 struct btrfs_dev_replace dev_replace; 1143 1144 struct semaphore uuid_tree_rescan_sem; 1145 1146 /* Used to reclaim the metadata space in the background. */ 1147 struct work_struct async_reclaim_work; 1148 1149 spinlock_t unused_bgs_lock; 1150 struct list_head unused_bgs; 1151 struct mutex unused_bg_unpin_mutex; 1152 struct mutex delete_unused_bgs_mutex; 1153 1154 /* Cached block sizes */ 1155 u32 nodesize; 1156 u32 sectorsize; 1157 u32 stripesize; 1158 1159 /* Block groups and devices containing active swapfiles. */ 1160 spinlock_t swapfile_pins_lock; 1161 struct rb_root swapfile_pins; 1162 1163 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1164 spinlock_t ref_verify_lock; 1165 struct rb_root block_tree; 1166 #endif 1167 }; 1168 1169 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1170 { 1171 return sb->s_fs_info; 1172 } 1173 1174 struct btrfs_subvolume_writers { 1175 struct percpu_counter counter; 1176 wait_queue_head_t wait; 1177 }; 1178 1179 /* 1180 * The state of btrfs root 1181 */ 1182 enum { 1183 /* 1184 * btrfs_record_root_in_trans is a multi-step process, and it can race 1185 * with the balancing code. But the race is very small, and only the 1186 * first time the root is added to each transaction. So IN_TRANS_SETUP 1187 * is used to tell us when more checks are required 1188 */ 1189 BTRFS_ROOT_IN_TRANS_SETUP, 1190 BTRFS_ROOT_REF_COWS, 1191 BTRFS_ROOT_TRACK_DIRTY, 1192 BTRFS_ROOT_IN_RADIX, 1193 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1194 BTRFS_ROOT_DEFRAG_RUNNING, 1195 BTRFS_ROOT_FORCE_COW, 1196 BTRFS_ROOT_MULTI_LOG_TASKS, 1197 BTRFS_ROOT_DIRTY, 1198 BTRFS_ROOT_DELETING, 1199 1200 /* 1201 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1202 * 1203 * Set for the subvolume tree owning the reloc tree. 1204 */ 1205 BTRFS_ROOT_DEAD_RELOC_TREE, 1206 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1207 BTRFS_ROOT_DEAD_TREE, 1208 }; 1209 1210 /* 1211 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1212 * code. For detail check comment in fs/btrfs/qgroup.c. 1213 */ 1214 struct btrfs_qgroup_swapped_blocks { 1215 spinlock_t lock; 1216 /* RM_EMPTY_ROOT() of above blocks[] */ 1217 bool swapped; 1218 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1219 }; 1220 1221 /* 1222 * in ram representation of the tree. extent_root is used for all allocations 1223 * and for the extent tree extent_root root. 1224 */ 1225 struct btrfs_root { 1226 struct extent_buffer *node; 1227 1228 struct extent_buffer *commit_root; 1229 struct btrfs_root *log_root; 1230 struct btrfs_root *reloc_root; 1231 1232 unsigned long state; 1233 struct btrfs_root_item root_item; 1234 struct btrfs_key root_key; 1235 struct btrfs_fs_info *fs_info; 1236 struct extent_io_tree dirty_log_pages; 1237 1238 struct mutex objectid_mutex; 1239 1240 spinlock_t accounting_lock; 1241 struct btrfs_block_rsv *block_rsv; 1242 1243 /* free ino cache stuff */ 1244 struct btrfs_free_space_ctl *free_ino_ctl; 1245 enum btrfs_caching_type ino_cache_state; 1246 spinlock_t ino_cache_lock; 1247 wait_queue_head_t ino_cache_wait; 1248 struct btrfs_free_space_ctl *free_ino_pinned; 1249 u64 ino_cache_progress; 1250 struct inode *ino_cache_inode; 1251 1252 struct mutex log_mutex; 1253 wait_queue_head_t log_writer_wait; 1254 wait_queue_head_t log_commit_wait[2]; 1255 struct list_head log_ctxs[2]; 1256 atomic_t log_writers; 1257 atomic_t log_commit[2]; 1258 atomic_t log_batch; 1259 int log_transid; 1260 /* No matter the commit succeeds or not*/ 1261 int log_transid_committed; 1262 /* Just be updated when the commit succeeds. */ 1263 int last_log_commit; 1264 pid_t log_start_pid; 1265 1266 u64 last_trans; 1267 1268 u32 type; 1269 1270 u64 highest_objectid; 1271 1272 u64 defrag_trans_start; 1273 struct btrfs_key defrag_progress; 1274 struct btrfs_key defrag_max; 1275 1276 /* the dirty list is only used by non-reference counted roots */ 1277 struct list_head dirty_list; 1278 1279 struct list_head root_list; 1280 1281 spinlock_t log_extents_lock[2]; 1282 struct list_head logged_list[2]; 1283 1284 int orphan_cleanup_state; 1285 1286 spinlock_t inode_lock; 1287 /* red-black tree that keeps track of in-memory inodes */ 1288 struct rb_root inode_tree; 1289 1290 /* 1291 * radix tree that keeps track of delayed nodes of every inode, 1292 * protected by inode_lock 1293 */ 1294 struct radix_tree_root delayed_nodes_tree; 1295 /* 1296 * right now this just gets used so that a root has its own devid 1297 * for stat. It may be used for more later 1298 */ 1299 dev_t anon_dev; 1300 1301 spinlock_t root_item_lock; 1302 refcount_t refs; 1303 1304 struct mutex delalloc_mutex; 1305 spinlock_t delalloc_lock; 1306 /* 1307 * all of the inodes that have delalloc bytes. It is possible for 1308 * this list to be empty even when there is still dirty data=ordered 1309 * extents waiting to finish IO. 1310 */ 1311 struct list_head delalloc_inodes; 1312 struct list_head delalloc_root; 1313 u64 nr_delalloc_inodes; 1314 1315 struct mutex ordered_extent_mutex; 1316 /* 1317 * this is used by the balancing code to wait for all the pending 1318 * ordered extents 1319 */ 1320 spinlock_t ordered_extent_lock; 1321 1322 /* 1323 * all of the data=ordered extents pending writeback 1324 * these can span multiple transactions and basically include 1325 * every dirty data page that isn't from nodatacow 1326 */ 1327 struct list_head ordered_extents; 1328 struct list_head ordered_root; 1329 u64 nr_ordered_extents; 1330 1331 /* 1332 * Not empty if this subvolume root has gone through tree block swap 1333 * (relocation) 1334 * 1335 * Will be used by reloc_control::dirty_subvol_roots. 1336 */ 1337 struct list_head reloc_dirty_list; 1338 1339 /* 1340 * Number of currently running SEND ioctls to prevent 1341 * manipulation with the read-only status via SUBVOL_SETFLAGS 1342 */ 1343 int send_in_progress; 1344 /* 1345 * Number of currently running deduplication operations that have a 1346 * destination inode belonging to this root. Protected by the lock 1347 * root_item_lock. 1348 */ 1349 int dedupe_in_progress; 1350 struct btrfs_subvolume_writers *subv_writers; 1351 atomic_t will_be_snapshotted; 1352 atomic_t snapshot_force_cow; 1353 1354 /* For qgroup metadata reserved space */ 1355 spinlock_t qgroup_meta_rsv_lock; 1356 u64 qgroup_meta_rsv_pertrans; 1357 u64 qgroup_meta_rsv_prealloc; 1358 1359 /* Number of active swapfiles */ 1360 atomic_t nr_swapfiles; 1361 1362 /* Record pairs of swapped blocks for qgroup */ 1363 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1364 1365 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1366 u64 alloc_bytenr; 1367 #endif 1368 }; 1369 1370 struct btrfs_file_private { 1371 void *filldir_buf; 1372 }; 1373 1374 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1375 { 1376 return btrfs_sb(inode->i_sb)->sectorsize; 1377 } 1378 1379 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1380 { 1381 1382 return info->nodesize - sizeof(struct btrfs_header); 1383 } 1384 1385 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1386 1387 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1388 { 1389 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1390 } 1391 1392 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1393 { 1394 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1395 } 1396 1397 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1398 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1399 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1400 { 1401 return BTRFS_MAX_ITEM_SIZE(info) - 1402 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1403 } 1404 1405 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1406 { 1407 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1408 } 1409 1410 /* 1411 * Flags for mount options. 1412 * 1413 * Note: don't forget to add new options to btrfs_show_options() 1414 */ 1415 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1416 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1417 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1418 #define BTRFS_MOUNT_SSD (1 << 3) 1419 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1420 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1421 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1422 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1423 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1424 #define BTRFS_MOUNT_NOSSD (1 << 9) 1425 #define BTRFS_MOUNT_DISCARD (1 << 10) 1426 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1427 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1428 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1429 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1430 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1431 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1432 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1433 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1434 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1435 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1436 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1437 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1438 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1439 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1440 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1441 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1442 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1443 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1444 1445 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1446 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1447 1448 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1449 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1450 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1451 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1452 BTRFS_MOUNT_##opt) 1453 1454 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1455 { \ 1456 if (!btrfs_test_opt(fs_info, opt)) \ 1457 btrfs_info(fs_info, fmt, ##args); \ 1458 btrfs_set_opt(fs_info->mount_opt, opt); \ 1459 } 1460 1461 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1462 { \ 1463 if (btrfs_test_opt(fs_info, opt)) \ 1464 btrfs_info(fs_info, fmt, ##args); \ 1465 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1466 } 1467 1468 #ifdef CONFIG_BTRFS_DEBUG 1469 static inline int 1470 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1471 { 1472 struct btrfs_fs_info *fs_info = block_group->fs_info; 1473 1474 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1475 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1476 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1477 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1478 } 1479 #endif 1480 1481 /* 1482 * Requests for changes that need to be done during transaction commit. 1483 * 1484 * Internal mount options that are used for special handling of the real 1485 * mount options (eg. cannot be set during remount and have to be set during 1486 * transaction commit) 1487 */ 1488 1489 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1490 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1491 #define BTRFS_PENDING_COMMIT (2) 1492 1493 #define btrfs_test_pending(info, opt) \ 1494 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1495 #define btrfs_set_pending(info, opt) \ 1496 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1497 #define btrfs_clear_pending(info, opt) \ 1498 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1499 1500 /* 1501 * Helpers for setting pending mount option changes. 1502 * 1503 * Expects corresponding macros 1504 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1505 */ 1506 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1507 do { \ 1508 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1509 btrfs_info((info), fmt, ##args); \ 1510 btrfs_set_pending((info), SET_##opt); \ 1511 btrfs_clear_pending((info), CLEAR_##opt); \ 1512 } \ 1513 } while(0) 1514 1515 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1516 do { \ 1517 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1518 btrfs_info((info), fmt, ##args); \ 1519 btrfs_set_pending((info), CLEAR_##opt); \ 1520 btrfs_clear_pending((info), SET_##opt); \ 1521 } \ 1522 } while(0) 1523 1524 /* 1525 * Inode flags 1526 */ 1527 #define BTRFS_INODE_NODATASUM (1 << 0) 1528 #define BTRFS_INODE_NODATACOW (1 << 1) 1529 #define BTRFS_INODE_READONLY (1 << 2) 1530 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1531 #define BTRFS_INODE_PREALLOC (1 << 4) 1532 #define BTRFS_INODE_SYNC (1 << 5) 1533 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1534 #define BTRFS_INODE_APPEND (1 << 7) 1535 #define BTRFS_INODE_NODUMP (1 << 8) 1536 #define BTRFS_INODE_NOATIME (1 << 9) 1537 #define BTRFS_INODE_DIRSYNC (1 << 10) 1538 #define BTRFS_INODE_COMPRESS (1 << 11) 1539 1540 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1541 1542 #define BTRFS_INODE_FLAG_MASK \ 1543 (BTRFS_INODE_NODATASUM | \ 1544 BTRFS_INODE_NODATACOW | \ 1545 BTRFS_INODE_READONLY | \ 1546 BTRFS_INODE_NOCOMPRESS | \ 1547 BTRFS_INODE_PREALLOC | \ 1548 BTRFS_INODE_SYNC | \ 1549 BTRFS_INODE_IMMUTABLE | \ 1550 BTRFS_INODE_APPEND | \ 1551 BTRFS_INODE_NODUMP | \ 1552 BTRFS_INODE_NOATIME | \ 1553 BTRFS_INODE_DIRSYNC | \ 1554 BTRFS_INODE_COMPRESS | \ 1555 BTRFS_INODE_ROOT_ITEM_INIT) 1556 1557 struct btrfs_map_token { 1558 const struct extent_buffer *eb; 1559 char *kaddr; 1560 unsigned long offset; 1561 }; 1562 1563 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1564 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1565 1566 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1567 { 1568 token->kaddr = NULL; 1569 } 1570 1571 /* some macros to generate set/get functions for the struct fields. This 1572 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1573 * one for u8: 1574 */ 1575 #define le8_to_cpu(v) (v) 1576 #define cpu_to_le8(v) (v) 1577 #define __le8 u8 1578 1579 #define read_eb_member(eb, ptr, type, member, result) (\ 1580 read_extent_buffer(eb, (char *)(result), \ 1581 ((unsigned long)(ptr)) + \ 1582 offsetof(type, member), \ 1583 sizeof(((type *)0)->member))) 1584 1585 #define write_eb_member(eb, ptr, type, member, result) (\ 1586 write_extent_buffer(eb, (char *)(result), \ 1587 ((unsigned long)(ptr)) + \ 1588 offsetof(type, member), \ 1589 sizeof(((type *)0)->member))) 1590 1591 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1592 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1593 const void *ptr, unsigned long off, \ 1594 struct btrfs_map_token *token); \ 1595 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1596 unsigned long off, u##bits val, \ 1597 struct btrfs_map_token *token); \ 1598 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1599 const void *ptr, \ 1600 unsigned long off) \ 1601 { \ 1602 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1603 } \ 1604 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1605 unsigned long off, u##bits val) \ 1606 { \ 1607 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1608 } 1609 1610 DECLARE_BTRFS_SETGET_BITS(8) 1611 DECLARE_BTRFS_SETGET_BITS(16) 1612 DECLARE_BTRFS_SETGET_BITS(32) 1613 DECLARE_BTRFS_SETGET_BITS(64) 1614 1615 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1616 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1617 const type *s) \ 1618 { \ 1619 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1620 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1621 } \ 1622 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1623 u##bits val) \ 1624 { \ 1625 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1626 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1627 } \ 1628 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1629 const type *s, \ 1630 struct btrfs_map_token *token) \ 1631 { \ 1632 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1633 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1634 } \ 1635 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1636 type *s, u##bits val, \ 1637 struct btrfs_map_token *token) \ 1638 { \ 1639 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1640 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1641 } 1642 1643 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1644 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1645 { \ 1646 const type *p = page_address(eb->pages[0]); \ 1647 u##bits res = le##bits##_to_cpu(p->member); \ 1648 return res; \ 1649 } \ 1650 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1651 u##bits val) \ 1652 { \ 1653 type *p = page_address(eb->pages[0]); \ 1654 p->member = cpu_to_le##bits(val); \ 1655 } 1656 1657 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1658 static inline u##bits btrfs_##name(const type *s) \ 1659 { \ 1660 return le##bits##_to_cpu(s->member); \ 1661 } \ 1662 static inline void btrfs_set_##name(type *s, u##bits val) \ 1663 { \ 1664 s->member = cpu_to_le##bits(val); \ 1665 } 1666 1667 1668 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1669 struct btrfs_dev_item *s) 1670 { 1671 BUILD_BUG_ON(sizeof(u64) != 1672 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1673 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1674 total_bytes)); 1675 } 1676 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1677 struct btrfs_dev_item *s, 1678 u64 val) 1679 { 1680 BUILD_BUG_ON(sizeof(u64) != 1681 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1682 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1683 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1684 } 1685 1686 1687 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1688 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1689 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1690 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1691 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1692 start_offset, 64); 1693 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1694 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1695 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1696 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1697 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1698 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1699 1700 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1701 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1702 total_bytes, 64); 1703 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1704 bytes_used, 64); 1705 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1706 io_align, 32); 1707 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1708 io_width, 32); 1709 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1710 sector_size, 32); 1711 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1712 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1713 dev_group, 32); 1714 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1715 seek_speed, 8); 1716 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1717 bandwidth, 8); 1718 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1719 generation, 64); 1720 1721 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1722 { 1723 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1724 } 1725 1726 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1727 { 1728 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1729 } 1730 1731 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1732 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1733 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1734 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1735 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1736 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1737 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1738 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1739 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1740 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1741 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1742 1743 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1744 { 1745 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1746 } 1747 1748 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1749 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1750 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1751 stripe_len, 64); 1752 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1753 io_align, 32); 1754 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1755 io_width, 32); 1756 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1757 sector_size, 32); 1758 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1759 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1760 num_stripes, 16); 1761 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1762 sub_stripes, 16); 1763 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1764 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1765 1766 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1767 int nr) 1768 { 1769 unsigned long offset = (unsigned long)c; 1770 offset += offsetof(struct btrfs_chunk, stripe); 1771 offset += nr * sizeof(struct btrfs_stripe); 1772 return (struct btrfs_stripe *)offset; 1773 } 1774 1775 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1776 { 1777 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1778 } 1779 1780 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1781 struct btrfs_chunk *c, int nr) 1782 { 1783 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1784 } 1785 1786 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1787 struct btrfs_chunk *c, int nr) 1788 { 1789 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1790 } 1791 1792 /* struct btrfs_block_group_item */ 1793 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1794 used, 64); 1795 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1796 used, 64); 1797 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1798 struct btrfs_block_group_item, chunk_objectid, 64); 1799 1800 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1801 struct btrfs_block_group_item, chunk_objectid, 64); 1802 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1803 struct btrfs_block_group_item, flags, 64); 1804 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1805 struct btrfs_block_group_item, flags, 64); 1806 1807 /* struct btrfs_free_space_info */ 1808 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1809 extent_count, 32); 1810 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1811 1812 /* struct btrfs_inode_ref */ 1813 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1814 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1815 1816 /* struct btrfs_inode_extref */ 1817 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1818 parent_objectid, 64); 1819 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1820 name_len, 16); 1821 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1822 1823 /* struct btrfs_inode_item */ 1824 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1825 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1826 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1827 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1828 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1829 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1830 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1831 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1832 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1833 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1834 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1835 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1836 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1837 generation, 64); 1838 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1839 sequence, 64); 1840 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1841 transid, 64); 1842 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1843 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1844 nbytes, 64); 1845 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1846 block_group, 64); 1847 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1848 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1849 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1850 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1851 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1852 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1853 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1854 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1855 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1856 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1857 1858 /* struct btrfs_dev_extent */ 1859 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1860 chunk_tree, 64); 1861 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1862 chunk_objectid, 64); 1863 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1864 chunk_offset, 64); 1865 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1866 1867 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1868 { 1869 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1870 return (unsigned long)dev + ptr; 1871 } 1872 1873 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1874 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1875 generation, 64); 1876 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1877 1878 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1879 1880 1881 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1882 1883 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1884 struct btrfs_tree_block_info *item, 1885 struct btrfs_disk_key *key) 1886 { 1887 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1888 } 1889 1890 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1891 struct btrfs_tree_block_info *item, 1892 struct btrfs_disk_key *key) 1893 { 1894 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1895 } 1896 1897 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1898 root, 64); 1899 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1900 objectid, 64); 1901 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1902 offset, 64); 1903 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1904 count, 32); 1905 1906 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1907 count, 32); 1908 1909 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1910 type, 8); 1911 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1912 offset, 64); 1913 1914 static inline u32 btrfs_extent_inline_ref_size(int type) 1915 { 1916 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1917 type == BTRFS_SHARED_BLOCK_REF_KEY) 1918 return sizeof(struct btrfs_extent_inline_ref); 1919 if (type == BTRFS_SHARED_DATA_REF_KEY) 1920 return sizeof(struct btrfs_shared_data_ref) + 1921 sizeof(struct btrfs_extent_inline_ref); 1922 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1923 return sizeof(struct btrfs_extent_data_ref) + 1924 offsetof(struct btrfs_extent_inline_ref, offset); 1925 return 0; 1926 } 1927 1928 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1929 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1930 generation, 64); 1931 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1932 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1933 1934 /* struct btrfs_node */ 1935 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1936 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1937 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1938 blockptr, 64); 1939 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1940 generation, 64); 1941 1942 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1943 { 1944 unsigned long ptr; 1945 ptr = offsetof(struct btrfs_node, ptrs) + 1946 sizeof(struct btrfs_key_ptr) * nr; 1947 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1948 } 1949 1950 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1951 int nr, u64 val) 1952 { 1953 unsigned long ptr; 1954 ptr = offsetof(struct btrfs_node, ptrs) + 1955 sizeof(struct btrfs_key_ptr) * nr; 1956 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1957 } 1958 1959 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1960 { 1961 unsigned long ptr; 1962 ptr = offsetof(struct btrfs_node, ptrs) + 1963 sizeof(struct btrfs_key_ptr) * nr; 1964 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1965 } 1966 1967 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1968 int nr, u64 val) 1969 { 1970 unsigned long ptr; 1971 ptr = offsetof(struct btrfs_node, ptrs) + 1972 sizeof(struct btrfs_key_ptr) * nr; 1973 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1974 } 1975 1976 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1977 { 1978 return offsetof(struct btrfs_node, ptrs) + 1979 sizeof(struct btrfs_key_ptr) * nr; 1980 } 1981 1982 void btrfs_node_key(const struct extent_buffer *eb, 1983 struct btrfs_disk_key *disk_key, int nr); 1984 1985 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1986 struct btrfs_disk_key *disk_key, int nr) 1987 { 1988 unsigned long ptr; 1989 ptr = btrfs_node_key_ptr_offset(nr); 1990 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1991 struct btrfs_key_ptr, key, disk_key); 1992 } 1993 1994 /* struct btrfs_item */ 1995 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1996 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1997 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1998 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1999 2000 static inline unsigned long btrfs_item_nr_offset(int nr) 2001 { 2002 return offsetof(struct btrfs_leaf, items) + 2003 sizeof(struct btrfs_item) * nr; 2004 } 2005 2006 static inline struct btrfs_item *btrfs_item_nr(int nr) 2007 { 2008 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 2009 } 2010 2011 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 2012 struct btrfs_item *item) 2013 { 2014 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 2015 } 2016 2017 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 2018 { 2019 return btrfs_item_end(eb, btrfs_item_nr(nr)); 2020 } 2021 2022 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 2023 { 2024 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 2025 } 2026 2027 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 2028 { 2029 return btrfs_item_size(eb, btrfs_item_nr(nr)); 2030 } 2031 2032 static inline void btrfs_item_key(const struct extent_buffer *eb, 2033 struct btrfs_disk_key *disk_key, int nr) 2034 { 2035 struct btrfs_item *item = btrfs_item_nr(nr); 2036 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 2037 } 2038 2039 static inline void btrfs_set_item_key(struct extent_buffer *eb, 2040 struct btrfs_disk_key *disk_key, int nr) 2041 { 2042 struct btrfs_item *item = btrfs_item_nr(nr); 2043 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 2044 } 2045 2046 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 2047 2048 /* 2049 * struct btrfs_root_ref 2050 */ 2051 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 2052 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 2053 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 2054 2055 /* struct btrfs_dir_item */ 2056 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 2057 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 2058 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 2059 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 2060 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 2061 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 2062 data_len, 16); 2063 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 2064 name_len, 16); 2065 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 2066 transid, 64); 2067 2068 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 2069 const struct btrfs_dir_item *item, 2070 struct btrfs_disk_key *key) 2071 { 2072 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 2073 } 2074 2075 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 2076 struct btrfs_dir_item *item, 2077 const struct btrfs_disk_key *key) 2078 { 2079 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 2080 } 2081 2082 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 2083 num_entries, 64); 2084 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 2085 num_bitmaps, 64); 2086 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 2087 generation, 64); 2088 2089 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 2090 const struct btrfs_free_space_header *h, 2091 struct btrfs_disk_key *key) 2092 { 2093 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2094 } 2095 2096 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 2097 struct btrfs_free_space_header *h, 2098 const struct btrfs_disk_key *key) 2099 { 2100 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2101 } 2102 2103 /* struct btrfs_disk_key */ 2104 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2105 objectid, 64); 2106 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2107 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2108 2109 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2110 const struct btrfs_disk_key *disk) 2111 { 2112 cpu->offset = le64_to_cpu(disk->offset); 2113 cpu->type = disk->type; 2114 cpu->objectid = le64_to_cpu(disk->objectid); 2115 } 2116 2117 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2118 const struct btrfs_key *cpu) 2119 { 2120 disk->offset = cpu_to_le64(cpu->offset); 2121 disk->type = cpu->type; 2122 disk->objectid = cpu_to_le64(cpu->objectid); 2123 } 2124 2125 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2126 struct btrfs_key *key, int nr) 2127 { 2128 struct btrfs_disk_key disk_key; 2129 btrfs_node_key(eb, &disk_key, nr); 2130 btrfs_disk_key_to_cpu(key, &disk_key); 2131 } 2132 2133 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2134 struct btrfs_key *key, int nr) 2135 { 2136 struct btrfs_disk_key disk_key; 2137 btrfs_item_key(eb, &disk_key, nr); 2138 btrfs_disk_key_to_cpu(key, &disk_key); 2139 } 2140 2141 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2142 const struct btrfs_dir_item *item, 2143 struct btrfs_key *key) 2144 { 2145 struct btrfs_disk_key disk_key; 2146 btrfs_dir_item_key(eb, item, &disk_key); 2147 btrfs_disk_key_to_cpu(key, &disk_key); 2148 } 2149 2150 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2151 { 2152 return key->type; 2153 } 2154 2155 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2156 { 2157 key->type = val; 2158 } 2159 2160 /* struct btrfs_header */ 2161 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2162 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2163 generation, 64); 2164 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2165 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2166 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2167 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2168 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2169 generation, 64); 2170 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2171 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2172 nritems, 32); 2173 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2174 2175 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2176 { 2177 return (btrfs_header_flags(eb) & flag) == flag; 2178 } 2179 2180 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2181 { 2182 u64 flags = btrfs_header_flags(eb); 2183 btrfs_set_header_flags(eb, flags | flag); 2184 } 2185 2186 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2187 { 2188 u64 flags = btrfs_header_flags(eb); 2189 btrfs_set_header_flags(eb, flags & ~flag); 2190 } 2191 2192 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2193 { 2194 u64 flags = btrfs_header_flags(eb); 2195 return flags >> BTRFS_BACKREF_REV_SHIFT; 2196 } 2197 2198 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2199 int rev) 2200 { 2201 u64 flags = btrfs_header_flags(eb); 2202 flags &= ~BTRFS_BACKREF_REV_MASK; 2203 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2204 btrfs_set_header_flags(eb, flags); 2205 } 2206 2207 static inline unsigned long btrfs_header_fsid(void) 2208 { 2209 return offsetof(struct btrfs_header, fsid); 2210 } 2211 2212 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2213 { 2214 return offsetof(struct btrfs_header, chunk_tree_uuid); 2215 } 2216 2217 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2218 { 2219 return btrfs_header_level(eb) == 0; 2220 } 2221 2222 /* struct btrfs_root_item */ 2223 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2224 generation, 64); 2225 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2226 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2227 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2228 2229 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2230 generation, 64); 2231 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2232 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2233 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2234 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2235 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2236 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2237 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2238 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2239 last_snapshot, 64); 2240 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2241 generation_v2, 64); 2242 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2243 ctransid, 64); 2244 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2245 otransid, 64); 2246 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2247 stransid, 64); 2248 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2249 rtransid, 64); 2250 2251 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2252 { 2253 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2254 } 2255 2256 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2257 { 2258 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2259 } 2260 2261 /* struct btrfs_root_backup */ 2262 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2263 tree_root, 64); 2264 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2265 tree_root_gen, 64); 2266 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2267 tree_root_level, 8); 2268 2269 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2270 chunk_root, 64); 2271 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2272 chunk_root_gen, 64); 2273 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2274 chunk_root_level, 8); 2275 2276 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2277 extent_root, 64); 2278 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2279 extent_root_gen, 64); 2280 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2281 extent_root_level, 8); 2282 2283 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2284 fs_root, 64); 2285 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2286 fs_root_gen, 64); 2287 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2288 fs_root_level, 8); 2289 2290 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2291 dev_root, 64); 2292 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2293 dev_root_gen, 64); 2294 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2295 dev_root_level, 8); 2296 2297 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2298 csum_root, 64); 2299 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2300 csum_root_gen, 64); 2301 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2302 csum_root_level, 8); 2303 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2304 total_bytes, 64); 2305 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2306 bytes_used, 64); 2307 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2308 num_devices, 64); 2309 2310 /* struct btrfs_balance_item */ 2311 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2312 2313 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2314 const struct btrfs_balance_item *bi, 2315 struct btrfs_disk_balance_args *ba) 2316 { 2317 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2318 } 2319 2320 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2321 struct btrfs_balance_item *bi, 2322 const struct btrfs_disk_balance_args *ba) 2323 { 2324 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2325 } 2326 2327 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2328 const struct btrfs_balance_item *bi, 2329 struct btrfs_disk_balance_args *ba) 2330 { 2331 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2332 } 2333 2334 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2335 struct btrfs_balance_item *bi, 2336 const struct btrfs_disk_balance_args *ba) 2337 { 2338 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2339 } 2340 2341 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2342 const struct btrfs_balance_item *bi, 2343 struct btrfs_disk_balance_args *ba) 2344 { 2345 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2346 } 2347 2348 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2349 struct btrfs_balance_item *bi, 2350 const struct btrfs_disk_balance_args *ba) 2351 { 2352 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2353 } 2354 2355 static inline void 2356 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2357 const struct btrfs_disk_balance_args *disk) 2358 { 2359 memset(cpu, 0, sizeof(*cpu)); 2360 2361 cpu->profiles = le64_to_cpu(disk->profiles); 2362 cpu->usage = le64_to_cpu(disk->usage); 2363 cpu->devid = le64_to_cpu(disk->devid); 2364 cpu->pstart = le64_to_cpu(disk->pstart); 2365 cpu->pend = le64_to_cpu(disk->pend); 2366 cpu->vstart = le64_to_cpu(disk->vstart); 2367 cpu->vend = le64_to_cpu(disk->vend); 2368 cpu->target = le64_to_cpu(disk->target); 2369 cpu->flags = le64_to_cpu(disk->flags); 2370 cpu->limit = le64_to_cpu(disk->limit); 2371 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2372 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2373 } 2374 2375 static inline void 2376 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2377 const struct btrfs_balance_args *cpu) 2378 { 2379 memset(disk, 0, sizeof(*disk)); 2380 2381 disk->profiles = cpu_to_le64(cpu->profiles); 2382 disk->usage = cpu_to_le64(cpu->usage); 2383 disk->devid = cpu_to_le64(cpu->devid); 2384 disk->pstart = cpu_to_le64(cpu->pstart); 2385 disk->pend = cpu_to_le64(cpu->pend); 2386 disk->vstart = cpu_to_le64(cpu->vstart); 2387 disk->vend = cpu_to_le64(cpu->vend); 2388 disk->target = cpu_to_le64(cpu->target); 2389 disk->flags = cpu_to_le64(cpu->flags); 2390 disk->limit = cpu_to_le64(cpu->limit); 2391 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2392 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2393 } 2394 2395 /* struct btrfs_super_block */ 2396 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2397 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2398 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2399 generation, 64); 2400 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2401 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2402 struct btrfs_super_block, sys_chunk_array_size, 32); 2403 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2404 struct btrfs_super_block, chunk_root_generation, 64); 2405 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2406 root_level, 8); 2407 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2408 chunk_root, 64); 2409 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2410 chunk_root_level, 8); 2411 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2412 log_root, 64); 2413 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2414 log_root_transid, 64); 2415 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2416 log_root_level, 8); 2417 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2418 total_bytes, 64); 2419 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2420 bytes_used, 64); 2421 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2422 sectorsize, 32); 2423 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2424 nodesize, 32); 2425 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2426 stripesize, 32); 2427 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2428 root_dir_objectid, 64); 2429 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2430 num_devices, 64); 2431 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2432 compat_flags, 64); 2433 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2434 compat_ro_flags, 64); 2435 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2436 incompat_flags, 64); 2437 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2438 csum_type, 16); 2439 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2440 cache_generation, 64); 2441 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2442 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2443 uuid_tree_generation, 64); 2444 2445 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2446 { 2447 u16 t = btrfs_super_csum_type(s); 2448 /* 2449 * csum type is validated at mount time 2450 */ 2451 return btrfs_csum_sizes[t]; 2452 } 2453 2454 2455 /* 2456 * The leaf data grows from end-to-front in the node. 2457 * this returns the address of the start of the last item, 2458 * which is the stop of the leaf data stack 2459 */ 2460 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2461 { 2462 u32 nr = btrfs_header_nritems(leaf); 2463 2464 if (nr == 0) 2465 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2466 return btrfs_item_offset_nr(leaf, nr - 1); 2467 } 2468 2469 /* struct btrfs_file_extent_item */ 2470 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2471 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2472 struct btrfs_file_extent_item, disk_bytenr, 64); 2473 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2474 struct btrfs_file_extent_item, offset, 64); 2475 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2476 struct btrfs_file_extent_item, generation, 64); 2477 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2478 struct btrfs_file_extent_item, num_bytes, 64); 2479 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2480 struct btrfs_file_extent_item, disk_num_bytes, 64); 2481 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2482 struct btrfs_file_extent_item, compression, 8); 2483 2484 static inline unsigned long 2485 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2486 { 2487 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2488 } 2489 2490 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2491 { 2492 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2493 } 2494 2495 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2496 disk_bytenr, 64); 2497 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2498 generation, 64); 2499 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2500 disk_num_bytes, 64); 2501 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2502 offset, 64); 2503 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2504 num_bytes, 64); 2505 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2506 ram_bytes, 64); 2507 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2508 compression, 8); 2509 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2510 encryption, 8); 2511 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2512 other_encoding, 16); 2513 2514 /* 2515 * this returns the number of bytes used by the item on disk, minus the 2516 * size of any extent headers. If a file is compressed on disk, this is 2517 * the compressed size 2518 */ 2519 static inline u32 btrfs_file_extent_inline_item_len( 2520 const struct extent_buffer *eb, 2521 struct btrfs_item *e) 2522 { 2523 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2524 } 2525 2526 /* btrfs_dev_stats_item */ 2527 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2528 const struct btrfs_dev_stats_item *ptr, 2529 int index) 2530 { 2531 u64 val; 2532 2533 read_extent_buffer(eb, &val, 2534 offsetof(struct btrfs_dev_stats_item, values) + 2535 ((unsigned long)ptr) + (index * sizeof(u64)), 2536 sizeof(val)); 2537 return val; 2538 } 2539 2540 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2541 struct btrfs_dev_stats_item *ptr, 2542 int index, u64 val) 2543 { 2544 write_extent_buffer(eb, &val, 2545 offsetof(struct btrfs_dev_stats_item, values) + 2546 ((unsigned long)ptr) + (index * sizeof(u64)), 2547 sizeof(val)); 2548 } 2549 2550 /* btrfs_qgroup_status_item */ 2551 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2552 generation, 64); 2553 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2554 version, 64); 2555 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2556 flags, 64); 2557 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2558 rescan, 64); 2559 2560 /* btrfs_qgroup_info_item */ 2561 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2562 generation, 64); 2563 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2564 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2565 rfer_cmpr, 64); 2566 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2567 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2568 excl_cmpr, 64); 2569 2570 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2571 struct btrfs_qgroup_info_item, generation, 64); 2572 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2573 rfer, 64); 2574 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2575 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2576 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2577 excl, 64); 2578 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2579 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2580 2581 /* btrfs_qgroup_limit_item */ 2582 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2583 flags, 64); 2584 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2585 max_rfer, 64); 2586 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2587 max_excl, 64); 2588 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2589 rsv_rfer, 64); 2590 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2591 rsv_excl, 64); 2592 2593 /* btrfs_dev_replace_item */ 2594 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2595 struct btrfs_dev_replace_item, src_devid, 64); 2596 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2597 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2598 64); 2599 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2600 replace_state, 64); 2601 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2602 time_started, 64); 2603 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2604 time_stopped, 64); 2605 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2606 num_write_errors, 64); 2607 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2608 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2609 64); 2610 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2611 cursor_left, 64); 2612 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2613 cursor_right, 64); 2614 2615 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2616 struct btrfs_dev_replace_item, src_devid, 64); 2617 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2618 struct btrfs_dev_replace_item, 2619 cont_reading_from_srcdev_mode, 64); 2620 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2621 struct btrfs_dev_replace_item, replace_state, 64); 2622 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2623 struct btrfs_dev_replace_item, time_started, 64); 2624 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2625 struct btrfs_dev_replace_item, time_stopped, 64); 2626 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2627 struct btrfs_dev_replace_item, num_write_errors, 64); 2628 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2629 struct btrfs_dev_replace_item, 2630 num_uncorrectable_read_errors, 64); 2631 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2632 struct btrfs_dev_replace_item, cursor_left, 64); 2633 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2634 struct btrfs_dev_replace_item, cursor_right, 64); 2635 2636 /* helper function to cast into the data area of the leaf. */ 2637 #define btrfs_item_ptr(leaf, slot, type) \ 2638 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2639 btrfs_item_offset_nr(leaf, slot))) 2640 2641 #define btrfs_item_ptr_offset(leaf, slot) \ 2642 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2643 btrfs_item_offset_nr(leaf, slot))) 2644 2645 static inline u64 btrfs_name_hash(const char *name, int len) 2646 { 2647 return crc32c((u32)~1, name, len); 2648 } 2649 2650 /* 2651 * Figure the key offset of an extended inode ref 2652 */ 2653 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2654 int len) 2655 { 2656 return (u64) crc32c(parent_objectid, name, len); 2657 } 2658 2659 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2660 { 2661 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2662 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2663 } 2664 2665 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2666 { 2667 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2668 } 2669 2670 /* extent-tree.c */ 2671 2672 enum btrfs_inline_ref_type { 2673 BTRFS_REF_TYPE_INVALID, 2674 BTRFS_REF_TYPE_BLOCK, 2675 BTRFS_REF_TYPE_DATA, 2676 BTRFS_REF_TYPE_ANY, 2677 }; 2678 2679 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2680 struct btrfs_extent_inline_ref *iref, 2681 enum btrfs_inline_ref_type is_data); 2682 2683 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2684 2685 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2686 unsigned num_items) 2687 { 2688 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2689 } 2690 2691 /* 2692 * Doing a truncate won't result in new nodes or leaves, just what we need for 2693 * COW. 2694 */ 2695 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2696 unsigned num_items) 2697 { 2698 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2699 } 2700 2701 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans); 2702 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info *fs_info); 2703 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2704 const u64 start); 2705 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2706 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2707 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2708 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2709 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2710 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2711 unsigned long count); 2712 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2713 struct btrfs_delayed_ref_root *delayed_refs, 2714 struct btrfs_delayed_ref_head *head); 2715 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2716 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2717 struct btrfs_fs_info *fs_info, u64 bytenr, 2718 u64 offset, int metadata, u64 *refs, u64 *flags); 2719 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2720 u64 bytenr, u64 num, int reserved); 2721 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2722 u64 bytenr, u64 num_bytes); 2723 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2724 int btrfs_cross_ref_exist(struct btrfs_root *root, 2725 u64 objectid, u64 offset, u64 bytenr); 2726 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2727 struct btrfs_fs_info *info, 2728 u64 bytenr); 2729 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2730 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2731 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2732 struct btrfs_root *root, 2733 u64 parent, u64 root_objectid, 2734 const struct btrfs_disk_key *key, 2735 int level, u64 hint, 2736 u64 empty_size); 2737 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2738 struct btrfs_root *root, 2739 struct extent_buffer *buf, 2740 u64 parent, int last_ref); 2741 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2742 struct btrfs_root *root, u64 owner, 2743 u64 offset, u64 ram_bytes, 2744 struct btrfs_key *ins); 2745 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2746 u64 root_objectid, u64 owner, u64 offset, 2747 struct btrfs_key *ins); 2748 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2749 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2750 struct btrfs_key *ins, int is_data, int delalloc); 2751 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2752 struct extent_buffer *buf, int full_backref); 2753 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2754 struct extent_buffer *buf, int full_backref); 2755 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2756 u64 bytenr, u64 num_bytes, u64 flags, 2757 int level, int is_data); 2758 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2759 2760 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2761 u64 start, u64 len, int delalloc); 2762 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2763 u64 start, u64 len); 2764 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2765 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2766 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2767 struct btrfs_ref *generic_ref); 2768 2769 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2770 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans); 2771 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans); 2772 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2773 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2774 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2775 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2776 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2777 u64 bytes_used, u64 type, u64 chunk_offset, 2778 u64 size); 2779 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2780 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2781 struct btrfs_fs_info *fs_info, 2782 const u64 chunk_offset); 2783 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2784 u64 group_start, struct extent_map *em); 2785 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2786 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2787 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2788 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2789 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2790 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2791 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2792 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2793 2794 enum btrfs_reserve_flush_enum { 2795 /* If we are in the transaction, we can't flush anything.*/ 2796 BTRFS_RESERVE_NO_FLUSH, 2797 /* 2798 * Flushing delalloc may cause deadlock somewhere, in this 2799 * case, use FLUSH LIMIT 2800 */ 2801 BTRFS_RESERVE_FLUSH_LIMIT, 2802 BTRFS_RESERVE_FLUSH_ALL, 2803 }; 2804 2805 enum btrfs_flush_state { 2806 FLUSH_DELAYED_ITEMS_NR = 1, 2807 FLUSH_DELAYED_ITEMS = 2, 2808 FLUSH_DELAYED_REFS_NR = 3, 2809 FLUSH_DELAYED_REFS = 4, 2810 FLUSH_DELALLOC = 5, 2811 FLUSH_DELALLOC_WAIT = 6, 2812 ALLOC_CHUNK = 7, 2813 ALLOC_CHUNK_FORCE = 8, 2814 COMMIT_TRANS = 9, 2815 }; 2816 2817 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2818 int btrfs_check_data_free_space(struct inode *inode, 2819 struct extent_changeset **reserved, u64 start, u64 len); 2820 void btrfs_free_reserved_data_space(struct inode *inode, 2821 struct extent_changeset *reserved, u64 start, u64 len); 2822 void btrfs_delalloc_release_space(struct inode *inode, 2823 struct extent_changeset *reserved, 2824 u64 start, u64 len, bool qgroup_free); 2825 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2826 u64 len); 2827 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2828 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2829 struct btrfs_block_rsv *rsv, 2830 int nitems, bool use_global_rsv); 2831 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2832 struct btrfs_block_rsv *rsv); 2833 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2834 bool qgroup_free); 2835 2836 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2837 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2838 bool qgroup_free); 2839 int btrfs_delalloc_reserve_space(struct inode *inode, 2840 struct extent_changeset **reserved, u64 start, u64 len); 2841 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2842 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2843 unsigned short type); 2844 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2845 struct btrfs_block_rsv *rsv, 2846 unsigned short type); 2847 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2848 struct btrfs_block_rsv *rsv); 2849 int btrfs_block_rsv_add(struct btrfs_root *root, 2850 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2851 enum btrfs_reserve_flush_enum flush); 2852 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2853 int btrfs_block_rsv_refill(struct btrfs_root *root, 2854 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2855 enum btrfs_reserve_flush_enum flush); 2856 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2857 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2858 bool update_size); 2859 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2860 struct btrfs_block_rsv *dest, u64 num_bytes, 2861 int min_factor); 2862 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2863 struct btrfs_block_rsv *block_rsv, 2864 u64 num_bytes); 2865 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr); 2866 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans); 2867 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info *fs_info, 2868 enum btrfs_reserve_flush_enum flush); 2869 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info *fs_info, 2870 struct btrfs_block_rsv *src, 2871 u64 num_bytes); 2872 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); 2873 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2874 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2875 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2876 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2877 u64 start, u64 end); 2878 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2879 u64 num_bytes, u64 *actual_bytes); 2880 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); 2881 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2882 2883 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2884 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2885 struct btrfs_fs_info *fs_info); 2886 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2887 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2888 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2889 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); 2890 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2891 u64 start, u64 end); 2892 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); 2893 2894 /* ctree.c */ 2895 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2896 int level, int *slot); 2897 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2898 int btrfs_previous_item(struct btrfs_root *root, 2899 struct btrfs_path *path, u64 min_objectid, 2900 int type); 2901 int btrfs_previous_extent_item(struct btrfs_root *root, 2902 struct btrfs_path *path, u64 min_objectid); 2903 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2904 struct btrfs_path *path, 2905 const struct btrfs_key *new_key); 2906 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2907 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2908 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2909 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2910 struct btrfs_key *key, int lowest_level, 2911 u64 min_trans); 2912 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2913 struct btrfs_path *path, 2914 u64 min_trans); 2915 enum btrfs_compare_tree_result { 2916 BTRFS_COMPARE_TREE_NEW, 2917 BTRFS_COMPARE_TREE_DELETED, 2918 BTRFS_COMPARE_TREE_CHANGED, 2919 BTRFS_COMPARE_TREE_SAME, 2920 }; 2921 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2922 struct btrfs_path *right_path, 2923 struct btrfs_key *key, 2924 enum btrfs_compare_tree_result result, 2925 void *ctx); 2926 int btrfs_compare_trees(struct btrfs_root *left_root, 2927 struct btrfs_root *right_root, 2928 btrfs_changed_cb_t cb, void *ctx); 2929 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2930 struct btrfs_root *root, struct extent_buffer *buf, 2931 struct extent_buffer *parent, int parent_slot, 2932 struct extent_buffer **cow_ret); 2933 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2934 struct btrfs_root *root, 2935 struct extent_buffer *buf, 2936 struct extent_buffer **cow_ret, u64 new_root_objectid); 2937 int btrfs_block_can_be_shared(struct btrfs_root *root, 2938 struct extent_buffer *buf); 2939 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2940 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2941 int btrfs_split_item(struct btrfs_trans_handle *trans, 2942 struct btrfs_root *root, 2943 struct btrfs_path *path, 2944 const struct btrfs_key *new_key, 2945 unsigned long split_offset); 2946 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2947 struct btrfs_root *root, 2948 struct btrfs_path *path, 2949 const struct btrfs_key *new_key); 2950 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2951 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2952 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2953 const struct btrfs_key *key, struct btrfs_path *p, 2954 int ins_len, int cow); 2955 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2956 struct btrfs_path *p, u64 time_seq); 2957 int btrfs_search_slot_for_read(struct btrfs_root *root, 2958 const struct btrfs_key *key, 2959 struct btrfs_path *p, int find_higher, 2960 int return_any); 2961 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2962 struct btrfs_root *root, struct extent_buffer *parent, 2963 int start_slot, u64 *last_ret, 2964 struct btrfs_key *progress); 2965 void btrfs_release_path(struct btrfs_path *p); 2966 struct btrfs_path *btrfs_alloc_path(void); 2967 void btrfs_free_path(struct btrfs_path *p); 2968 void btrfs_set_path_blocking(struct btrfs_path *p); 2969 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2970 2971 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2972 struct btrfs_path *path, int slot, int nr); 2973 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2974 struct btrfs_root *root, 2975 struct btrfs_path *path) 2976 { 2977 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2978 } 2979 2980 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2981 const struct btrfs_key *cpu_key, u32 *data_size, 2982 u32 total_data, u32 total_size, int nr); 2983 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2984 const struct btrfs_key *key, void *data, u32 data_size); 2985 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2986 struct btrfs_root *root, 2987 struct btrfs_path *path, 2988 const struct btrfs_key *cpu_key, u32 *data_size, 2989 int nr); 2990 2991 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2992 struct btrfs_root *root, 2993 struct btrfs_path *path, 2994 const struct btrfs_key *key, 2995 u32 data_size) 2996 { 2997 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2998 } 2999 3000 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 3001 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 3002 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 3003 u64 time_seq); 3004 static inline int btrfs_next_old_item(struct btrfs_root *root, 3005 struct btrfs_path *p, u64 time_seq) 3006 { 3007 ++p->slots[0]; 3008 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 3009 return btrfs_next_old_leaf(root, p, time_seq); 3010 return 0; 3011 } 3012 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 3013 { 3014 return btrfs_next_old_item(root, p, 0); 3015 } 3016 int btrfs_leaf_free_space(struct extent_buffer *leaf); 3017 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 3018 struct btrfs_block_rsv *block_rsv, 3019 int update_ref, int for_reloc); 3020 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 3021 struct btrfs_root *root, 3022 struct extent_buffer *node, 3023 struct extent_buffer *parent); 3024 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 3025 { 3026 /* 3027 * Do it this way so we only ever do one test_bit in the normal case. 3028 */ 3029 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 3030 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 3031 return 2; 3032 return 1; 3033 } 3034 return 0; 3035 } 3036 3037 /* 3038 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 3039 * anything except sleeping. This function is used to check the status of 3040 * the fs. 3041 */ 3042 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 3043 { 3044 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 3045 } 3046 3047 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 3048 { 3049 kfree(fs_info->balance_ctl); 3050 kfree(fs_info->delayed_root); 3051 kfree(fs_info->extent_root); 3052 kfree(fs_info->tree_root); 3053 kfree(fs_info->chunk_root); 3054 kfree(fs_info->dev_root); 3055 kfree(fs_info->csum_root); 3056 kfree(fs_info->quota_root); 3057 kfree(fs_info->uuid_root); 3058 kfree(fs_info->free_space_root); 3059 kfree(fs_info->super_copy); 3060 kfree(fs_info->super_for_commit); 3061 kvfree(fs_info); 3062 } 3063 3064 /* tree mod log functions from ctree.c */ 3065 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 3066 struct seq_list *elem); 3067 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 3068 struct seq_list *elem); 3069 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 3070 3071 /* root-item.c */ 3072 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 3073 u64 ref_id, u64 dirid, u64 sequence, const char *name, 3074 int name_len); 3075 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 3076 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 3077 int name_len); 3078 int btrfs_del_root(struct btrfs_trans_handle *trans, 3079 const struct btrfs_key *key); 3080 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 3081 const struct btrfs_key *key, 3082 struct btrfs_root_item *item); 3083 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3084 struct btrfs_root *root, 3085 struct btrfs_key *key, 3086 struct btrfs_root_item *item); 3087 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3088 struct btrfs_path *path, struct btrfs_root_item *root_item, 3089 struct btrfs_key *root_key); 3090 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3091 void btrfs_set_root_node(struct btrfs_root_item *item, 3092 struct extent_buffer *node); 3093 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3094 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3095 struct btrfs_root *root); 3096 3097 /* uuid-tree.c */ 3098 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3099 u64 subid); 3100 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3101 u64 subid); 3102 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3103 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3104 u64)); 3105 3106 /* dir-item.c */ 3107 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3108 const char *name, int name_len); 3109 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 3110 int name_len, struct btrfs_inode *dir, 3111 struct btrfs_key *location, u8 type, u64 index); 3112 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3113 struct btrfs_root *root, 3114 struct btrfs_path *path, u64 dir, 3115 const char *name, int name_len, 3116 int mod); 3117 struct btrfs_dir_item * 3118 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3119 struct btrfs_root *root, 3120 struct btrfs_path *path, u64 dir, 3121 u64 objectid, const char *name, int name_len, 3122 int mod); 3123 struct btrfs_dir_item * 3124 btrfs_search_dir_index_item(struct btrfs_root *root, 3125 struct btrfs_path *path, u64 dirid, 3126 const char *name, int name_len); 3127 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3128 struct btrfs_root *root, 3129 struct btrfs_path *path, 3130 struct btrfs_dir_item *di); 3131 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3132 struct btrfs_root *root, 3133 struct btrfs_path *path, u64 objectid, 3134 const char *name, u16 name_len, 3135 const void *data, u16 data_len); 3136 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3137 struct btrfs_root *root, 3138 struct btrfs_path *path, u64 dir, 3139 const char *name, u16 name_len, 3140 int mod); 3141 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3142 struct btrfs_path *path, 3143 const char *name, 3144 int name_len); 3145 3146 /* orphan.c */ 3147 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3148 struct btrfs_root *root, u64 offset); 3149 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3150 struct btrfs_root *root, u64 offset); 3151 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3152 3153 /* inode-item.c */ 3154 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3155 struct btrfs_root *root, 3156 const char *name, int name_len, 3157 u64 inode_objectid, u64 ref_objectid, u64 index); 3158 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3159 struct btrfs_root *root, 3160 const char *name, int name_len, 3161 u64 inode_objectid, u64 ref_objectid, u64 *index); 3162 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3163 struct btrfs_root *root, 3164 struct btrfs_path *path, u64 objectid); 3165 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3166 *root, struct btrfs_path *path, 3167 struct btrfs_key *location, int mod); 3168 3169 struct btrfs_inode_extref * 3170 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3171 struct btrfs_root *root, 3172 struct btrfs_path *path, 3173 const char *name, int name_len, 3174 u64 inode_objectid, u64 ref_objectid, int ins_len, 3175 int cow); 3176 3177 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3178 const char *name, 3179 int name_len, struct btrfs_inode_ref **ref_ret); 3180 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3181 u64 ref_objectid, const char *name, 3182 int name_len, 3183 struct btrfs_inode_extref **extref_ret); 3184 3185 /* file-item.c */ 3186 struct btrfs_dio_private; 3187 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3188 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3189 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3190 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3191 u64 logical_offset); 3192 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3193 struct btrfs_root *root, 3194 u64 objectid, u64 pos, 3195 u64 disk_offset, u64 disk_num_bytes, 3196 u64 num_bytes, u64 offset, u64 ram_bytes, 3197 u8 compression, u8 encryption, u16 other_encoding); 3198 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3199 struct btrfs_root *root, 3200 struct btrfs_path *path, u64 objectid, 3201 u64 bytenr, int mod); 3202 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3203 struct btrfs_root *root, 3204 struct btrfs_ordered_sum *sums); 3205 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3206 u64 file_start, int contig); 3207 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3208 struct list_head *list, int search_commit); 3209 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3210 const struct btrfs_path *path, 3211 struct btrfs_file_extent_item *fi, 3212 const bool new_inline, 3213 struct extent_map *em); 3214 3215 /* inode.c */ 3216 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3217 u64 start, u64 len); 3218 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3219 u64 *orig_start, u64 *orig_block_len, 3220 u64 *ram_bytes); 3221 3222 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3223 struct btrfs_inode *inode); 3224 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3225 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3226 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3227 struct btrfs_root *root, 3228 struct btrfs_inode *dir, struct btrfs_inode *inode, 3229 const char *name, int name_len); 3230 int btrfs_add_link(struct btrfs_trans_handle *trans, 3231 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3232 const char *name, int name_len, int add_backref, u64 index); 3233 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3234 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3235 int front); 3236 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3237 struct btrfs_root *root, 3238 struct inode *inode, u64 new_size, 3239 u32 min_type); 3240 3241 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3242 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3243 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3244 unsigned int extra_bits, 3245 struct extent_state **cached_state, int dedupe); 3246 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3247 struct btrfs_root *new_root, 3248 struct btrfs_root *parent_root, 3249 u64 new_dirid); 3250 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3251 unsigned *bits); 3252 void btrfs_clear_delalloc_extent(struct inode *inode, 3253 struct extent_state *state, unsigned *bits); 3254 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3255 struct extent_state *other); 3256 void btrfs_split_delalloc_extent(struct inode *inode, 3257 struct extent_state *orig, u64 split); 3258 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3259 unsigned long bio_flags); 3260 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3261 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3262 int btrfs_readpage(struct file *file, struct page *page); 3263 void btrfs_evict_inode(struct inode *inode); 3264 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3265 struct inode *btrfs_alloc_inode(struct super_block *sb); 3266 void btrfs_destroy_inode(struct inode *inode); 3267 void btrfs_free_inode(struct inode *inode); 3268 int btrfs_drop_inode(struct inode *inode); 3269 int __init btrfs_init_cachep(void); 3270 void __cold btrfs_destroy_cachep(void); 3271 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 3272 struct btrfs_root *root, int *new, 3273 struct btrfs_path *path); 3274 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3275 struct btrfs_root *root, int *was_new); 3276 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3277 struct page *page, size_t pg_offset, 3278 u64 start, u64 end, int create); 3279 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3280 struct btrfs_root *root, 3281 struct inode *inode); 3282 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3283 struct btrfs_root *root, struct inode *inode); 3284 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3285 struct btrfs_inode *inode); 3286 int btrfs_orphan_cleanup(struct btrfs_root *root); 3287 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3288 void btrfs_add_delayed_iput(struct inode *inode); 3289 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3290 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3291 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3292 u64 start, u64 num_bytes, u64 min_size, 3293 loff_t actual_len, u64 *alloc_hint); 3294 int btrfs_prealloc_file_range_trans(struct inode *inode, 3295 struct btrfs_trans_handle *trans, int mode, 3296 u64 start, u64 num_bytes, u64 min_size, 3297 loff_t actual_len, u64 *alloc_hint); 3298 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 3299 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3300 struct writeback_control *wbc); 3301 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3302 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3303 u64 end, int uptodate); 3304 extern const struct dentry_operations btrfs_dentry_operations; 3305 3306 /* ioctl.c */ 3307 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3308 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3309 int btrfs_ioctl_get_supported_features(void __user *arg); 3310 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3311 int btrfs_is_empty_uuid(u8 *uuid); 3312 int btrfs_defrag_file(struct inode *inode, struct file *file, 3313 struct btrfs_ioctl_defrag_range_args *range, 3314 u64 newer_than, unsigned long max_pages); 3315 void btrfs_get_block_group_info(struct list_head *groups_list, 3316 struct btrfs_ioctl_space_info *space); 3317 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3318 struct btrfs_ioctl_balance_args *bargs); 3319 3320 /* file.c */ 3321 int __init btrfs_auto_defrag_init(void); 3322 void __cold btrfs_auto_defrag_exit(void); 3323 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3324 struct btrfs_inode *inode); 3325 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3326 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3327 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3328 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3329 int skip_pinned); 3330 extern const struct file_operations btrfs_file_operations; 3331 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3332 struct btrfs_root *root, struct inode *inode, 3333 struct btrfs_path *path, u64 start, u64 end, 3334 u64 *drop_end, int drop_cache, 3335 int replace_extent, 3336 u32 extent_item_size, 3337 int *key_inserted); 3338 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3339 struct btrfs_root *root, struct inode *inode, u64 start, 3340 u64 end, int drop_cache); 3341 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3342 struct btrfs_inode *inode, u64 start, u64 end); 3343 int btrfs_release_file(struct inode *inode, struct file *file); 3344 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3345 size_t num_pages, loff_t pos, size_t write_bytes, 3346 struct extent_state **cached); 3347 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3348 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 3349 struct file *file_out, loff_t pos_out, 3350 loff_t len, unsigned int remap_flags); 3351 3352 /* tree-defrag.c */ 3353 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3354 struct btrfs_root *root); 3355 3356 /* sysfs.c */ 3357 int __init btrfs_init_sysfs(void); 3358 void __cold btrfs_exit_sysfs(void); 3359 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3360 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3361 3362 /* super.c */ 3363 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3364 unsigned long new_flags); 3365 int btrfs_sync_fs(struct super_block *sb, int wait); 3366 3367 static inline __printf(2, 3) __cold 3368 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3369 { 3370 } 3371 3372 #ifdef CONFIG_PRINTK 3373 __printf(2, 3) 3374 __cold 3375 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3376 #else 3377 #define btrfs_printk(fs_info, fmt, args...) \ 3378 btrfs_no_printk(fs_info, fmt, ##args) 3379 #endif 3380 3381 #define btrfs_emerg(fs_info, fmt, args...) \ 3382 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3383 #define btrfs_alert(fs_info, fmt, args...) \ 3384 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3385 #define btrfs_crit(fs_info, fmt, args...) \ 3386 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3387 #define btrfs_err(fs_info, fmt, args...) \ 3388 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3389 #define btrfs_warn(fs_info, fmt, args...) \ 3390 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3391 #define btrfs_notice(fs_info, fmt, args...) \ 3392 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3393 #define btrfs_info(fs_info, fmt, args...) \ 3394 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3395 3396 /* 3397 * Wrappers that use printk_in_rcu 3398 */ 3399 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3400 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3401 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3402 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3403 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3404 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3405 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3406 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3407 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3408 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3409 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3410 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3411 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3412 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3413 3414 /* 3415 * Wrappers that use a ratelimited printk_in_rcu 3416 */ 3417 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3418 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3419 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3420 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3421 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3422 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3423 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3424 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3425 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3426 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3427 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3428 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3429 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3430 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3431 3432 /* 3433 * Wrappers that use a ratelimited printk 3434 */ 3435 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3436 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3437 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3438 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3439 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3440 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3441 #define btrfs_err_rl(fs_info, fmt, args...) \ 3442 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3443 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3444 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3445 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3446 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3447 #define btrfs_info_rl(fs_info, fmt, args...) \ 3448 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3449 3450 #if defined(CONFIG_DYNAMIC_DEBUG) 3451 #define btrfs_debug(fs_info, fmt, args...) \ 3452 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3453 fs_info, KERN_DEBUG fmt, ##args) 3454 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3455 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3456 fs_info, KERN_DEBUG fmt, ##args) 3457 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3458 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3459 fs_info, KERN_DEBUG fmt, ##args) 3460 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3461 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3462 fs_info, KERN_DEBUG fmt, ##args) 3463 #elif defined(DEBUG) 3464 #define btrfs_debug(fs_info, fmt, args...) \ 3465 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3466 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3467 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3468 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3469 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3470 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3471 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3472 #else 3473 #define btrfs_debug(fs_info, fmt, args...) \ 3474 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3475 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3476 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3477 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3478 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3479 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3480 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3481 #endif 3482 3483 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3484 do { \ 3485 rcu_read_lock(); \ 3486 btrfs_printk(fs_info, fmt, ##args); \ 3487 rcu_read_unlock(); \ 3488 } while (0) 3489 3490 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3491 do { \ 3492 rcu_read_lock(); \ 3493 btrfs_no_printk(fs_info, fmt, ##args); \ 3494 rcu_read_unlock(); \ 3495 } while (0) 3496 3497 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3498 do { \ 3499 static DEFINE_RATELIMIT_STATE(_rs, \ 3500 DEFAULT_RATELIMIT_INTERVAL, \ 3501 DEFAULT_RATELIMIT_BURST); \ 3502 if (__ratelimit(&_rs)) \ 3503 btrfs_printk(fs_info, fmt, ##args); \ 3504 } while (0) 3505 3506 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3507 do { \ 3508 rcu_read_lock(); \ 3509 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3510 rcu_read_unlock(); \ 3511 } while (0) 3512 3513 __cold 3514 static inline void assfail(const char *expr, const char *file, int line) 3515 { 3516 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { 3517 pr_err("assertion failed: %s, file: %s, line: %d\n", 3518 expr, file, line); 3519 BUG(); 3520 } 3521 } 3522 3523 #define ASSERT(expr) \ 3524 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3525 3526 /* 3527 * Use that for functions that are conditionally exported for sanity tests but 3528 * otherwise static 3529 */ 3530 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3531 #define EXPORT_FOR_TESTS static 3532 #else 3533 #define EXPORT_FOR_TESTS 3534 #endif 3535 3536 __cold 3537 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3538 { 3539 btrfs_err(fs_info, 3540 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3541 } 3542 3543 __printf(5, 6) 3544 __cold 3545 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3546 unsigned int line, int errno, const char *fmt, ...); 3547 3548 const char *btrfs_decode_error(int errno); 3549 3550 __cold 3551 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3552 const char *function, 3553 unsigned int line, int errno); 3554 3555 /* 3556 * Call btrfs_abort_transaction as early as possible when an error condition is 3557 * detected, that way the exact line number is reported. 3558 */ 3559 #define btrfs_abort_transaction(trans, errno) \ 3560 do { \ 3561 /* Report first abort since mount */ \ 3562 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3563 &((trans)->fs_info->fs_state))) { \ 3564 if ((errno) != -EIO) { \ 3565 WARN(1, KERN_DEBUG \ 3566 "BTRFS: Transaction aborted (error %d)\n", \ 3567 (errno)); \ 3568 } else { \ 3569 btrfs_debug((trans)->fs_info, \ 3570 "Transaction aborted (error %d)", \ 3571 (errno)); \ 3572 } \ 3573 } \ 3574 __btrfs_abort_transaction((trans), __func__, \ 3575 __LINE__, (errno)); \ 3576 } while (0) 3577 3578 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3579 do { \ 3580 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3581 (errno), fmt, ##args); \ 3582 } while (0) 3583 3584 __printf(5, 6) 3585 __cold 3586 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3587 unsigned int line, int errno, const char *fmt, ...); 3588 /* 3589 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3590 * will panic(). Otherwise we BUG() here. 3591 */ 3592 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3593 do { \ 3594 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3595 BUG(); \ 3596 } while (0) 3597 3598 3599 /* compatibility and incompatibility defines */ 3600 3601 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3602 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3603 3604 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3605 u64 flag) 3606 { 3607 struct btrfs_super_block *disk_super; 3608 u64 features; 3609 3610 disk_super = fs_info->super_copy; 3611 features = btrfs_super_incompat_flags(disk_super); 3612 if (!(features & flag)) { 3613 spin_lock(&fs_info->super_lock); 3614 features = btrfs_super_incompat_flags(disk_super); 3615 if (!(features & flag)) { 3616 features |= flag; 3617 btrfs_set_super_incompat_flags(disk_super, features); 3618 btrfs_info(fs_info, "setting %llu feature flag", 3619 flag); 3620 } 3621 spin_unlock(&fs_info->super_lock); 3622 } 3623 } 3624 3625 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3626 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3627 3628 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3629 u64 flag) 3630 { 3631 struct btrfs_super_block *disk_super; 3632 u64 features; 3633 3634 disk_super = fs_info->super_copy; 3635 features = btrfs_super_incompat_flags(disk_super); 3636 if (features & flag) { 3637 spin_lock(&fs_info->super_lock); 3638 features = btrfs_super_incompat_flags(disk_super); 3639 if (features & flag) { 3640 features &= ~flag; 3641 btrfs_set_super_incompat_flags(disk_super, features); 3642 btrfs_info(fs_info, "clearing %llu feature flag", 3643 flag); 3644 } 3645 spin_unlock(&fs_info->super_lock); 3646 } 3647 } 3648 3649 #define btrfs_fs_incompat(fs_info, opt) \ 3650 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3651 3652 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3653 { 3654 struct btrfs_super_block *disk_super; 3655 disk_super = fs_info->super_copy; 3656 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3657 } 3658 3659 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3660 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3661 3662 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3663 u64 flag) 3664 { 3665 struct btrfs_super_block *disk_super; 3666 u64 features; 3667 3668 disk_super = fs_info->super_copy; 3669 features = btrfs_super_compat_ro_flags(disk_super); 3670 if (!(features & flag)) { 3671 spin_lock(&fs_info->super_lock); 3672 features = btrfs_super_compat_ro_flags(disk_super); 3673 if (!(features & flag)) { 3674 features |= flag; 3675 btrfs_set_super_compat_ro_flags(disk_super, features); 3676 btrfs_info(fs_info, "setting %llu ro feature flag", 3677 flag); 3678 } 3679 spin_unlock(&fs_info->super_lock); 3680 } 3681 } 3682 3683 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3684 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3685 3686 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3687 u64 flag) 3688 { 3689 struct btrfs_super_block *disk_super; 3690 u64 features; 3691 3692 disk_super = fs_info->super_copy; 3693 features = btrfs_super_compat_ro_flags(disk_super); 3694 if (features & flag) { 3695 spin_lock(&fs_info->super_lock); 3696 features = btrfs_super_compat_ro_flags(disk_super); 3697 if (features & flag) { 3698 features &= ~flag; 3699 btrfs_set_super_compat_ro_flags(disk_super, features); 3700 btrfs_info(fs_info, "clearing %llu ro feature flag", 3701 flag); 3702 } 3703 spin_unlock(&fs_info->super_lock); 3704 } 3705 } 3706 3707 #define btrfs_fs_compat_ro(fs_info, opt) \ 3708 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3709 3710 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3711 { 3712 struct btrfs_super_block *disk_super; 3713 disk_super = fs_info->super_copy; 3714 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3715 } 3716 3717 /* acl.c */ 3718 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3719 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3720 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3721 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3722 struct inode *inode, struct inode *dir); 3723 #else 3724 #define btrfs_get_acl NULL 3725 #define btrfs_set_acl NULL 3726 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3727 struct inode *inode, struct inode *dir) 3728 { 3729 return 0; 3730 } 3731 #endif 3732 3733 /* relocation.c */ 3734 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3735 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3736 struct btrfs_root *root); 3737 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3738 struct btrfs_root *root); 3739 int btrfs_recover_relocation(struct btrfs_root *root); 3740 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3741 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3742 struct btrfs_root *root, struct extent_buffer *buf, 3743 struct extent_buffer *cow); 3744 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3745 u64 *bytes_to_reserve); 3746 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3747 struct btrfs_pending_snapshot *pending); 3748 3749 /* scrub.c */ 3750 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3751 u64 end, struct btrfs_scrub_progress *progress, 3752 int readonly, int is_dev_replace); 3753 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3754 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3755 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3756 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3757 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3758 struct btrfs_scrub_progress *progress); 3759 static inline void btrfs_init_full_stripe_locks_tree( 3760 struct btrfs_full_stripe_locks_tree *locks_root) 3761 { 3762 locks_root->root = RB_ROOT; 3763 mutex_init(&locks_root->lock); 3764 } 3765 3766 /* dev-replace.c */ 3767 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3768 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3769 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3770 3771 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3772 { 3773 btrfs_bio_counter_sub(fs_info, 1); 3774 } 3775 3776 /* reada.c */ 3777 struct reada_control { 3778 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3779 struct btrfs_key key_start; 3780 struct btrfs_key key_end; /* exclusive */ 3781 atomic_t elems; 3782 struct kref refcnt; 3783 wait_queue_head_t wait; 3784 }; 3785 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3786 struct btrfs_key *start, struct btrfs_key *end); 3787 int btrfs_reada_wait(void *handle); 3788 void btrfs_reada_detach(void *handle); 3789 int btree_readahead_hook(struct extent_buffer *eb, int err); 3790 3791 static inline int is_fstree(u64 rootid) 3792 { 3793 if (rootid == BTRFS_FS_TREE_OBJECTID || 3794 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3795 !btrfs_qgroup_level(rootid))) 3796 return 1; 3797 return 0; 3798 } 3799 3800 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3801 { 3802 return signal_pending(current); 3803 } 3804 3805 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3806 3807 /* Sanity test specific functions */ 3808 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3809 void btrfs_test_inode_set_ops(struct inode *inode); 3810 void btrfs_test_destroy_inode(struct inode *inode); 3811 3812 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3813 { 3814 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3815 } 3816 #else 3817 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3818 { 3819 return 0; 3820 } 3821 #endif 3822 3823 static inline void cond_wake_up(struct wait_queue_head *wq) 3824 { 3825 /* 3826 * This implies a full smp_mb barrier, see comments for 3827 * waitqueue_active why. 3828 */ 3829 if (wq_has_sleeper(wq)) 3830 wake_up(wq); 3831 } 3832 3833 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3834 { 3835 /* 3836 * Special case for conditional wakeup where the barrier required for 3837 * waitqueue_active is implied by some of the preceding code. Eg. one 3838 * of such atomic operations (atomic_dec_and_return, ...), or a 3839 * unlock/lock sequence, etc. 3840 */ 3841 if (waitqueue_active(wq)) 3842 wake_up(wq); 3843 } 3844 3845 #endif 3846