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