1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <linux/kobject.h> 20 #include <trace/events/btrfs.h> 21 #include <asm/kmap_types.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 35 struct btrfs_trans_handle; 36 struct btrfs_transaction; 37 struct btrfs_pending_snapshot; 38 extern struct kmem_cache *btrfs_trans_handle_cachep; 39 extern struct kmem_cache *btrfs_bit_radix_cachep; 40 extern struct kmem_cache *btrfs_path_cachep; 41 extern struct kmem_cache *btrfs_free_space_cachep; 42 struct btrfs_ordered_sum; 43 44 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 45 #define STATIC noinline 46 #else 47 #define STATIC static noinline 48 #endif 49 50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 51 52 #define BTRFS_MAX_MIRRORS 3 53 54 #define BTRFS_MAX_LEVEL 8 55 56 #define BTRFS_OLDEST_GENERATION 0ULL 57 58 #define BTRFS_COMPAT_EXTENT_TREE_V0 59 60 /* 61 * the max metadata block size. This limit is somewhat artificial, 62 * but the memmove costs go through the roof for larger blocks. 63 */ 64 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 65 66 /* 67 * we can actually store much bigger names, but lets not confuse the rest 68 * of linux 69 */ 70 #define BTRFS_NAME_LEN 255 71 72 /* 73 * Theoretical limit is larger, but we keep this down to a sane 74 * value. That should limit greatly the possibility of collisions on 75 * inode ref items. 76 */ 77 #define BTRFS_LINK_MAX 65535U 78 79 /* four bytes for CRC32 */ 80 static const int btrfs_csum_sizes[] = { 4 }; 81 82 #define BTRFS_EMPTY_DIR_SIZE 0 83 84 /* ioprio of readahead is set to idle */ 85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 86 87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 88 89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 90 91 92 /* 93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 94 */ 95 static inline u32 count_max_extents(u64 size) 96 { 97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 98 } 99 100 struct btrfs_mapping_tree { 101 struct extent_map_tree map_tree; 102 }; 103 104 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 105 { 106 BUG_ON(num_stripes == 0); 107 return sizeof(struct btrfs_chunk) + 108 sizeof(struct btrfs_stripe) * (num_stripes - 1); 109 } 110 111 /* 112 * File system states 113 */ 114 #define BTRFS_FS_STATE_ERROR 0 115 #define BTRFS_FS_STATE_REMOUNTING 1 116 #define BTRFS_FS_STATE_TRANS_ABORTED 2 117 #define BTRFS_FS_STATE_DEV_REPLACING 3 118 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 119 120 #define BTRFS_BACKREF_REV_MAX 256 121 #define BTRFS_BACKREF_REV_SHIFT 56 122 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 123 BTRFS_BACKREF_REV_SHIFT) 124 125 #define BTRFS_OLD_BACKREF_REV 0 126 #define BTRFS_MIXED_BACKREF_REV 1 127 128 /* 129 * every tree block (leaf or node) starts with this header. 130 */ 131 struct btrfs_header { 132 /* these first four must match the super block */ 133 u8 csum[BTRFS_CSUM_SIZE]; 134 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 135 __le64 bytenr; /* which block this node is supposed to live in */ 136 __le64 flags; 137 138 /* allowed to be different from the super from here on down */ 139 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 140 __le64 generation; 141 __le64 owner; 142 __le32 nritems; 143 u8 level; 144 } __attribute__ ((__packed__)); 145 146 /* 147 * this is a very generous portion of the super block, giving us 148 * room to translate 14 chunks with 3 stripes each. 149 */ 150 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 151 152 /* 153 * just in case we somehow lose the roots and are not able to mount, 154 * we store an array of the roots from previous transactions 155 * in the super. 156 */ 157 #define BTRFS_NUM_BACKUP_ROOTS 4 158 struct btrfs_root_backup { 159 __le64 tree_root; 160 __le64 tree_root_gen; 161 162 __le64 chunk_root; 163 __le64 chunk_root_gen; 164 165 __le64 extent_root; 166 __le64 extent_root_gen; 167 168 __le64 fs_root; 169 __le64 fs_root_gen; 170 171 __le64 dev_root; 172 __le64 dev_root_gen; 173 174 __le64 csum_root; 175 __le64 csum_root_gen; 176 177 __le64 total_bytes; 178 __le64 bytes_used; 179 __le64 num_devices; 180 /* future */ 181 __le64 unused_64[4]; 182 183 u8 tree_root_level; 184 u8 chunk_root_level; 185 u8 extent_root_level; 186 u8 fs_root_level; 187 u8 dev_root_level; 188 u8 csum_root_level; 189 /* future and to align */ 190 u8 unused_8[10]; 191 } __attribute__ ((__packed__)); 192 193 /* 194 * the super block basically lists the main trees of the FS 195 * it currently lacks any block count etc etc 196 */ 197 struct btrfs_super_block { 198 u8 csum[BTRFS_CSUM_SIZE]; 199 /* the first 4 fields must match struct btrfs_header */ 200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 201 __le64 bytenr; /* this block number */ 202 __le64 flags; 203 204 /* allowed to be different from the btrfs_header from here own down */ 205 __le64 magic; 206 __le64 generation; 207 __le64 root; 208 __le64 chunk_root; 209 __le64 log_root; 210 211 /* this will help find the new super based on the log root */ 212 __le64 log_root_transid; 213 __le64 total_bytes; 214 __le64 bytes_used; 215 __le64 root_dir_objectid; 216 __le64 num_devices; 217 __le32 sectorsize; 218 __le32 nodesize; 219 __le32 __unused_leafsize; 220 __le32 stripesize; 221 __le32 sys_chunk_array_size; 222 __le64 chunk_root_generation; 223 __le64 compat_flags; 224 __le64 compat_ro_flags; 225 __le64 incompat_flags; 226 __le16 csum_type; 227 u8 root_level; 228 u8 chunk_root_level; 229 u8 log_root_level; 230 struct btrfs_dev_item dev_item; 231 232 char label[BTRFS_LABEL_SIZE]; 233 234 __le64 cache_generation; 235 __le64 uuid_tree_generation; 236 237 /* future expansion */ 238 __le64 reserved[30]; 239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 240 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 241 } __attribute__ ((__packed__)); 242 243 /* 244 * Compat flags that we support. If any incompat flags are set other than the 245 * ones specified below then we will fail to mount 246 */ 247 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 248 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 249 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 250 251 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 252 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 253 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 254 255 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 257 258 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 259 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 260 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 261 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 262 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 263 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 264 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 265 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 268 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 269 270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 273 274 /* 275 * A leaf is full of items. offset and size tell us where to find 276 * the item in the leaf (relative to the start of the data area) 277 */ 278 struct btrfs_item { 279 struct btrfs_disk_key key; 280 __le32 offset; 281 __le32 size; 282 } __attribute__ ((__packed__)); 283 284 /* 285 * leaves have an item area and a data area: 286 * [item0, item1....itemN] [free space] [dataN...data1, data0] 287 * 288 * The data is separate from the items to get the keys closer together 289 * during searches. 290 */ 291 struct btrfs_leaf { 292 struct btrfs_header header; 293 struct btrfs_item items[]; 294 } __attribute__ ((__packed__)); 295 296 /* 297 * all non-leaf blocks are nodes, they hold only keys and pointers to 298 * other blocks 299 */ 300 struct btrfs_key_ptr { 301 struct btrfs_disk_key key; 302 __le64 blockptr; 303 __le64 generation; 304 } __attribute__ ((__packed__)); 305 306 struct btrfs_node { 307 struct btrfs_header header; 308 struct btrfs_key_ptr ptrs[]; 309 } __attribute__ ((__packed__)); 310 311 /* 312 * btrfs_paths remember the path taken from the root down to the leaf. 313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 314 * to any other levels that are present. 315 * 316 * The slots array records the index of the item or block pointer 317 * used while walking the tree. 318 */ 319 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 320 struct btrfs_path { 321 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 322 int slots[BTRFS_MAX_LEVEL]; 323 /* if there is real range locking, this locks field will change */ 324 u8 locks[BTRFS_MAX_LEVEL]; 325 u8 reada; 326 /* keep some upper locks as we walk down */ 327 u8 lowest_level; 328 329 /* 330 * set by btrfs_split_item, tells search_slot to keep all locks 331 * and to force calls to keep space in the nodes 332 */ 333 unsigned int search_for_split:1; 334 unsigned int keep_locks:1; 335 unsigned int skip_locking:1; 336 unsigned int leave_spinning:1; 337 unsigned int search_commit_root:1; 338 unsigned int need_commit_sem:1; 339 unsigned int skip_release_on_error:1; 340 }; 341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 342 sizeof(struct btrfs_item)) 343 struct btrfs_dev_replace { 344 u64 replace_state; /* see #define above */ 345 u64 time_started; /* seconds since 1-Jan-1970 */ 346 u64 time_stopped; /* seconds since 1-Jan-1970 */ 347 atomic64_t num_write_errors; 348 atomic64_t num_uncorrectable_read_errors; 349 350 u64 cursor_left; 351 u64 committed_cursor_left; 352 u64 cursor_left_last_write_of_item; 353 u64 cursor_right; 354 355 u64 cont_reading_from_srcdev_mode; /* see #define above */ 356 357 int is_valid; 358 int item_needs_writeback; 359 struct btrfs_device *srcdev; 360 struct btrfs_device *tgtdev; 361 362 pid_t lock_owner; 363 atomic_t nesting_level; 364 struct mutex lock_finishing_cancel_unmount; 365 rwlock_t lock; 366 atomic_t read_locks; 367 atomic_t blocking_readers; 368 wait_queue_head_t read_lock_wq; 369 370 struct btrfs_scrub_progress scrub_progress; 371 }; 372 373 /* For raid type sysfs entries */ 374 struct raid_kobject { 375 u64 flags; 376 struct kobject kobj; 377 struct list_head list; 378 }; 379 380 struct btrfs_space_info { 381 spinlock_t lock; 382 383 u64 total_bytes; /* total bytes in the space, 384 this doesn't take mirrors into account */ 385 u64 bytes_used; /* total bytes used, 386 this doesn't take mirrors into account */ 387 u64 bytes_pinned; /* total bytes pinned, will be freed when the 388 transaction finishes */ 389 u64 bytes_reserved; /* total bytes the allocator has reserved for 390 current allocations */ 391 u64 bytes_may_use; /* number of bytes that may be used for 392 delalloc/allocations */ 393 u64 bytes_readonly; /* total bytes that are read only */ 394 395 u64 max_extent_size; /* This will hold the maximum extent size of 396 the space info if we had an ENOSPC in the 397 allocator. */ 398 399 unsigned int full:1; /* indicates that we cannot allocate any more 400 chunks for this space */ 401 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 402 403 unsigned int flush:1; /* set if we are trying to make space */ 404 405 unsigned int force_alloc; /* set if we need to force a chunk 406 alloc for this space */ 407 408 u64 disk_used; /* total bytes used on disk */ 409 u64 disk_total; /* total bytes on disk, takes mirrors into 410 account */ 411 412 u64 flags; 413 414 /* 415 * bytes_pinned is kept in line with what is actually pinned, as in 416 * we've called update_block_group and dropped the bytes_used counter 417 * and increased the bytes_pinned counter. However this means that 418 * bytes_pinned does not reflect the bytes that will be pinned once the 419 * delayed refs are flushed, so this counter is inc'ed every time we 420 * call btrfs_free_extent so it is a realtime count of what will be 421 * freed once the transaction is committed. It will be zeroed every 422 * time the transaction commits. 423 */ 424 struct percpu_counter total_bytes_pinned; 425 426 struct list_head list; 427 /* Protected by the spinlock 'lock'. */ 428 struct list_head ro_bgs; 429 struct list_head priority_tickets; 430 struct list_head tickets; 431 /* 432 * tickets_id just indicates the next ticket will be handled, so note 433 * it's not stored per ticket. 434 */ 435 u64 tickets_id; 436 437 struct rw_semaphore groups_sem; 438 /* for block groups in our same type */ 439 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 440 wait_queue_head_t wait; 441 442 struct kobject kobj; 443 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 444 }; 445 446 #define BTRFS_BLOCK_RSV_GLOBAL 1 447 #define BTRFS_BLOCK_RSV_DELALLOC 2 448 #define BTRFS_BLOCK_RSV_TRANS 3 449 #define BTRFS_BLOCK_RSV_CHUNK 4 450 #define BTRFS_BLOCK_RSV_DELOPS 5 451 #define BTRFS_BLOCK_RSV_EMPTY 6 452 #define BTRFS_BLOCK_RSV_TEMP 7 453 454 struct btrfs_block_rsv { 455 u64 size; 456 u64 reserved; 457 struct btrfs_space_info *space_info; 458 spinlock_t lock; 459 unsigned short full; 460 unsigned short type; 461 unsigned short failfast; 462 463 /* 464 * Qgroup equivalent for @size @reserved 465 * 466 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 467 * about things like csum size nor how many tree blocks it will need to 468 * reserve. 469 * 470 * Qgroup cares more about net change of the extent usage. 471 * 472 * So for one newly inserted file extent, in worst case it will cause 473 * leaf split and level increase, nodesize for each file extent is 474 * already too much. 475 * 476 * In short, qgroup_size/reserved is the upper limit of possible needed 477 * qgroup metadata reservation. 478 */ 479 u64 qgroup_rsv_size; 480 u64 qgroup_rsv_reserved; 481 }; 482 483 /* 484 * free clusters are used to claim free space in relatively large chunks, 485 * allowing us to do less seeky writes. They are used for all metadata 486 * allocations. In ssd_spread mode they are also used for data allocations. 487 */ 488 struct btrfs_free_cluster { 489 spinlock_t lock; 490 spinlock_t refill_lock; 491 struct rb_root root; 492 493 /* largest extent in this cluster */ 494 u64 max_size; 495 496 /* first extent starting offset */ 497 u64 window_start; 498 499 /* We did a full search and couldn't create a cluster */ 500 bool fragmented; 501 502 struct btrfs_block_group_cache *block_group; 503 /* 504 * when a cluster is allocated from a block group, we put the 505 * cluster onto a list in the block group so that it can 506 * be freed before the block group is freed. 507 */ 508 struct list_head block_group_list; 509 }; 510 511 enum btrfs_caching_type { 512 BTRFS_CACHE_NO = 0, 513 BTRFS_CACHE_STARTED = 1, 514 BTRFS_CACHE_FAST = 2, 515 BTRFS_CACHE_FINISHED = 3, 516 BTRFS_CACHE_ERROR = 4, 517 }; 518 519 enum btrfs_disk_cache_state { 520 BTRFS_DC_WRITTEN = 0, 521 BTRFS_DC_ERROR = 1, 522 BTRFS_DC_CLEAR = 2, 523 BTRFS_DC_SETUP = 3, 524 }; 525 526 struct btrfs_caching_control { 527 struct list_head list; 528 struct mutex mutex; 529 wait_queue_head_t wait; 530 struct btrfs_work work; 531 struct btrfs_block_group_cache *block_group; 532 u64 progress; 533 refcount_t count; 534 }; 535 536 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 537 #define CACHING_CTL_WAKE_UP SZ_2M 538 539 struct btrfs_io_ctl { 540 void *cur, *orig; 541 struct page *page; 542 struct page **pages; 543 struct btrfs_fs_info *fs_info; 544 struct inode *inode; 545 unsigned long size; 546 int index; 547 int num_pages; 548 int entries; 549 int bitmaps; 550 unsigned check_crcs:1; 551 }; 552 553 /* 554 * Tree to record all locked full stripes of a RAID5/6 block group 555 */ 556 struct btrfs_full_stripe_locks_tree { 557 struct rb_root root; 558 struct mutex lock; 559 }; 560 561 struct btrfs_block_group_cache { 562 struct btrfs_key key; 563 struct btrfs_block_group_item item; 564 struct btrfs_fs_info *fs_info; 565 struct inode *inode; 566 spinlock_t lock; 567 u64 pinned; 568 u64 reserved; 569 u64 delalloc_bytes; 570 u64 bytes_super; 571 u64 flags; 572 u64 cache_generation; 573 574 /* 575 * If the free space extent count exceeds this number, convert the block 576 * group to bitmaps. 577 */ 578 u32 bitmap_high_thresh; 579 580 /* 581 * If the free space extent count drops below this number, convert the 582 * block group back to extents. 583 */ 584 u32 bitmap_low_thresh; 585 586 /* 587 * It is just used for the delayed data space allocation because 588 * only the data space allocation and the relative metadata update 589 * can be done cross the transaction. 590 */ 591 struct rw_semaphore data_rwsem; 592 593 /* for raid56, this is a full stripe, without parity */ 594 unsigned long full_stripe_len; 595 596 unsigned int ro; 597 unsigned int iref:1; 598 unsigned int has_caching_ctl:1; 599 unsigned int removed:1; 600 601 int disk_cache_state; 602 603 /* cache tracking stuff */ 604 int cached; 605 struct btrfs_caching_control *caching_ctl; 606 u64 last_byte_to_unpin; 607 608 struct btrfs_space_info *space_info; 609 610 /* free space cache stuff */ 611 struct btrfs_free_space_ctl *free_space_ctl; 612 613 /* block group cache stuff */ 614 struct rb_node cache_node; 615 616 /* for block groups in the same raid type */ 617 struct list_head list; 618 619 /* usage count */ 620 atomic_t count; 621 622 /* List of struct btrfs_free_clusters for this block group. 623 * Today it will only have one thing on it, but that may change 624 */ 625 struct list_head cluster_list; 626 627 /* For delayed block group creation or deletion of empty block groups */ 628 struct list_head bg_list; 629 630 /* For read-only block groups */ 631 struct list_head ro_list; 632 633 atomic_t trimming; 634 635 /* For dirty block groups */ 636 struct list_head dirty_list; 637 struct list_head io_list; 638 639 struct btrfs_io_ctl io_ctl; 640 641 /* 642 * Incremented when doing extent allocations and holding a read lock 643 * on the space_info's groups_sem semaphore. 644 * Decremented when an ordered extent that represents an IO against this 645 * block group's range is created (after it's added to its inode's 646 * root's list of ordered extents) or immediately after the allocation 647 * if it's a metadata extent or fallocate extent (for these cases we 648 * don't create ordered extents). 649 */ 650 atomic_t reservations; 651 652 /* 653 * Incremented while holding the spinlock *lock* by a task checking if 654 * it can perform a nocow write (incremented if the value for the *ro* 655 * field is 0). Decremented by such tasks once they create an ordered 656 * extent or before that if some error happens before reaching that step. 657 * This is to prevent races between block group relocation and nocow 658 * writes through direct IO. 659 */ 660 atomic_t nocow_writers; 661 662 /* Lock for free space tree operations. */ 663 struct mutex free_space_lock; 664 665 /* 666 * Does the block group need to be added to the free space tree? 667 * Protected by free_space_lock. 668 */ 669 int needs_free_space; 670 671 /* Record locked full stripes for RAID5/6 block group */ 672 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 673 }; 674 675 /* delayed seq elem */ 676 struct seq_list { 677 struct list_head list; 678 u64 seq; 679 }; 680 681 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 682 683 #define SEQ_LAST ((u64)-1) 684 685 enum btrfs_orphan_cleanup_state { 686 ORPHAN_CLEANUP_STARTED = 1, 687 ORPHAN_CLEANUP_DONE = 2, 688 }; 689 690 /* used by the raid56 code to lock stripes for read/modify/write */ 691 struct btrfs_stripe_hash { 692 struct list_head hash_list; 693 spinlock_t lock; 694 }; 695 696 /* used by the raid56 code to lock stripes for read/modify/write */ 697 struct btrfs_stripe_hash_table { 698 struct list_head stripe_cache; 699 spinlock_t cache_lock; 700 int cache_size; 701 struct btrfs_stripe_hash table[]; 702 }; 703 704 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 705 706 void btrfs_init_async_reclaim_work(struct work_struct *work); 707 708 /* fs_info */ 709 struct reloc_control; 710 struct btrfs_device; 711 struct btrfs_fs_devices; 712 struct btrfs_balance_control; 713 struct btrfs_delayed_root; 714 715 #define BTRFS_FS_BARRIER 1 716 #define BTRFS_FS_CLOSING_START 2 717 #define BTRFS_FS_CLOSING_DONE 3 718 #define BTRFS_FS_LOG_RECOVERING 4 719 #define BTRFS_FS_OPEN 5 720 #define BTRFS_FS_QUOTA_ENABLED 6 721 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 722 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 723 #define BTRFS_FS_BTREE_ERR 11 724 #define BTRFS_FS_LOG1_ERR 12 725 #define BTRFS_FS_LOG2_ERR 13 726 #define BTRFS_FS_QUOTA_OVERRIDE 14 727 /* Used to record internally whether fs has been frozen */ 728 #define BTRFS_FS_FROZEN 15 729 730 /* 731 * Indicate that a whole-filesystem exclusive operation is running 732 * (device replace, resize, device add/delete, balance) 733 */ 734 #define BTRFS_FS_EXCL_OP 16 735 736 /* 737 * To info transaction_kthread we need an immediate commit so it doesn't 738 * need to wait for commit_interval 739 */ 740 #define BTRFS_FS_NEED_ASYNC_COMMIT 17 741 742 /* 743 * Indicate that balance has been set up from the ioctl and is in the main 744 * phase. The fs_info::balance_ctl is initialized. 745 */ 746 #define BTRFS_FS_BALANCE_RUNNING 18 747 748 struct btrfs_fs_info { 749 u8 fsid[BTRFS_FSID_SIZE]; 750 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 751 unsigned long flags; 752 struct btrfs_root *extent_root; 753 struct btrfs_root *tree_root; 754 struct btrfs_root *chunk_root; 755 struct btrfs_root *dev_root; 756 struct btrfs_root *fs_root; 757 struct btrfs_root *csum_root; 758 struct btrfs_root *quota_root; 759 struct btrfs_root *uuid_root; 760 struct btrfs_root *free_space_root; 761 762 /* the log root tree is a directory of all the other log roots */ 763 struct btrfs_root *log_root_tree; 764 765 spinlock_t fs_roots_radix_lock; 766 struct radix_tree_root fs_roots_radix; 767 768 /* block group cache stuff */ 769 spinlock_t block_group_cache_lock; 770 u64 first_logical_byte; 771 struct rb_root block_group_cache_tree; 772 773 /* keep track of unallocated space */ 774 atomic64_t free_chunk_space; 775 776 struct extent_io_tree freed_extents[2]; 777 struct extent_io_tree *pinned_extents; 778 779 /* logical->physical extent mapping */ 780 struct btrfs_mapping_tree mapping_tree; 781 782 /* 783 * block reservation for extent, checksum, root tree and 784 * delayed dir index item 785 */ 786 struct btrfs_block_rsv global_block_rsv; 787 /* block reservation for metadata operations */ 788 struct btrfs_block_rsv trans_block_rsv; 789 /* block reservation for chunk tree */ 790 struct btrfs_block_rsv chunk_block_rsv; 791 /* block reservation for delayed operations */ 792 struct btrfs_block_rsv delayed_block_rsv; 793 794 struct btrfs_block_rsv empty_block_rsv; 795 796 u64 generation; 797 u64 last_trans_committed; 798 u64 avg_delayed_ref_runtime; 799 800 /* 801 * this is updated to the current trans every time a full commit 802 * is required instead of the faster short fsync log commits 803 */ 804 u64 last_trans_log_full_commit; 805 unsigned long mount_opt; 806 /* 807 * Track requests for actions that need to be done during transaction 808 * commit (like for some mount options). 809 */ 810 unsigned long pending_changes; 811 unsigned long compress_type:4; 812 unsigned int compress_level; 813 u32 commit_interval; 814 /* 815 * It is a suggestive number, the read side is safe even it gets a 816 * wrong number because we will write out the data into a regular 817 * extent. The write side(mount/remount) is under ->s_umount lock, 818 * so it is also safe. 819 */ 820 u64 max_inline; 821 822 struct btrfs_transaction *running_transaction; 823 wait_queue_head_t transaction_throttle; 824 wait_queue_head_t transaction_wait; 825 wait_queue_head_t transaction_blocked_wait; 826 wait_queue_head_t async_submit_wait; 827 828 /* 829 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 830 * when they are updated. 831 * 832 * Because we do not clear the flags for ever, so we needn't use 833 * the lock on the read side. 834 * 835 * We also needn't use the lock when we mount the fs, because 836 * there is no other task which will update the flag. 837 */ 838 spinlock_t super_lock; 839 struct btrfs_super_block *super_copy; 840 struct btrfs_super_block *super_for_commit; 841 struct super_block *sb; 842 struct inode *btree_inode; 843 struct mutex tree_log_mutex; 844 struct mutex transaction_kthread_mutex; 845 struct mutex cleaner_mutex; 846 struct mutex chunk_mutex; 847 848 /* 849 * this is taken to make sure we don't set block groups ro after 850 * the free space cache has been allocated on them 851 */ 852 struct mutex ro_block_group_mutex; 853 854 /* this is used during read/modify/write to make sure 855 * no two ios are trying to mod the same stripe at the same 856 * time 857 */ 858 struct btrfs_stripe_hash_table *stripe_hash_table; 859 860 /* 861 * this protects the ordered operations list only while we are 862 * processing all of the entries on it. This way we make 863 * sure the commit code doesn't find the list temporarily empty 864 * because another function happens to be doing non-waiting preflush 865 * before jumping into the main commit. 866 */ 867 struct mutex ordered_operations_mutex; 868 869 struct rw_semaphore commit_root_sem; 870 871 struct rw_semaphore cleanup_work_sem; 872 873 struct rw_semaphore subvol_sem; 874 struct srcu_struct subvol_srcu; 875 876 spinlock_t trans_lock; 877 /* 878 * the reloc mutex goes with the trans lock, it is taken 879 * during commit to protect us from the relocation code 880 */ 881 struct mutex reloc_mutex; 882 883 struct list_head trans_list; 884 struct list_head dead_roots; 885 struct list_head caching_block_groups; 886 887 spinlock_t delayed_iput_lock; 888 struct list_head delayed_iputs; 889 struct mutex cleaner_delayed_iput_mutex; 890 891 /* this protects tree_mod_seq_list */ 892 spinlock_t tree_mod_seq_lock; 893 atomic64_t tree_mod_seq; 894 struct list_head tree_mod_seq_list; 895 896 /* this protects tree_mod_log */ 897 rwlock_t tree_mod_log_lock; 898 struct rb_root tree_mod_log; 899 900 atomic_t async_delalloc_pages; 901 902 /* 903 * this is used to protect the following list -- ordered_roots. 904 */ 905 spinlock_t ordered_root_lock; 906 907 /* 908 * all fs/file tree roots in which there are data=ordered extents 909 * pending writeback are added into this list. 910 * 911 * these can span multiple transactions and basically include 912 * every dirty data page that isn't from nodatacow 913 */ 914 struct list_head ordered_roots; 915 916 struct mutex delalloc_root_mutex; 917 spinlock_t delalloc_root_lock; 918 /* all fs/file tree roots that have delalloc inodes. */ 919 struct list_head delalloc_roots; 920 921 /* 922 * there is a pool of worker threads for checksumming during writes 923 * and a pool for checksumming after reads. This is because readers 924 * can run with FS locks held, and the writers may be waiting for 925 * those locks. We don't want ordering in the pending list to cause 926 * deadlocks, and so the two are serviced separately. 927 * 928 * A third pool does submit_bio to avoid deadlocking with the other 929 * two 930 */ 931 struct btrfs_workqueue *workers; 932 struct btrfs_workqueue *delalloc_workers; 933 struct btrfs_workqueue *flush_workers; 934 struct btrfs_workqueue *endio_workers; 935 struct btrfs_workqueue *endio_meta_workers; 936 struct btrfs_workqueue *endio_raid56_workers; 937 struct btrfs_workqueue *endio_repair_workers; 938 struct btrfs_workqueue *rmw_workers; 939 struct btrfs_workqueue *endio_meta_write_workers; 940 struct btrfs_workqueue *endio_write_workers; 941 struct btrfs_workqueue *endio_freespace_worker; 942 struct btrfs_workqueue *submit_workers; 943 struct btrfs_workqueue *caching_workers; 944 struct btrfs_workqueue *readahead_workers; 945 946 /* 947 * fixup workers take dirty pages that didn't properly go through 948 * the cow mechanism and make them safe to write. It happens 949 * for the sys_munmap function call path 950 */ 951 struct btrfs_workqueue *fixup_workers; 952 struct btrfs_workqueue *delayed_workers; 953 954 /* the extent workers do delayed refs on the extent allocation tree */ 955 struct btrfs_workqueue *extent_workers; 956 struct task_struct *transaction_kthread; 957 struct task_struct *cleaner_kthread; 958 u32 thread_pool_size; 959 960 struct kobject *space_info_kobj; 961 struct list_head pending_raid_kobjs; 962 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 963 964 u64 total_pinned; 965 966 /* used to keep from writing metadata until there is a nice batch */ 967 struct percpu_counter dirty_metadata_bytes; 968 struct percpu_counter delalloc_bytes; 969 s32 dirty_metadata_batch; 970 s32 delalloc_batch; 971 972 struct list_head dirty_cowonly_roots; 973 974 struct btrfs_fs_devices *fs_devices; 975 976 /* 977 * The space_info list is effectively read only after initial 978 * setup. It is populated at mount time and cleaned up after 979 * all block groups are removed. RCU is used to protect it. 980 */ 981 struct list_head space_info; 982 983 struct btrfs_space_info *data_sinfo; 984 985 struct reloc_control *reloc_ctl; 986 987 /* data_alloc_cluster is only used in ssd_spread mode */ 988 struct btrfs_free_cluster data_alloc_cluster; 989 990 /* all metadata allocations go through this cluster */ 991 struct btrfs_free_cluster meta_alloc_cluster; 992 993 /* auto defrag inodes go here */ 994 spinlock_t defrag_inodes_lock; 995 struct rb_root defrag_inodes; 996 atomic_t defrag_running; 997 998 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 999 seqlock_t profiles_lock; 1000 /* 1001 * these three are in extended format (availability of single 1002 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 1003 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 1004 */ 1005 u64 avail_data_alloc_bits; 1006 u64 avail_metadata_alloc_bits; 1007 u64 avail_system_alloc_bits; 1008 1009 /* restriper state */ 1010 spinlock_t balance_lock; 1011 struct mutex balance_mutex; 1012 atomic_t balance_pause_req; 1013 atomic_t balance_cancel_req; 1014 struct btrfs_balance_control *balance_ctl; 1015 wait_queue_head_t balance_wait_q; 1016 1017 u32 data_chunk_allocations; 1018 u32 metadata_ratio; 1019 1020 void *bdev_holder; 1021 1022 /* private scrub information */ 1023 struct mutex scrub_lock; 1024 atomic_t scrubs_running; 1025 atomic_t scrub_pause_req; 1026 atomic_t scrubs_paused; 1027 atomic_t scrub_cancel_req; 1028 wait_queue_head_t scrub_pause_wait; 1029 int scrub_workers_refcnt; 1030 struct btrfs_workqueue *scrub_workers; 1031 struct btrfs_workqueue *scrub_wr_completion_workers; 1032 struct btrfs_workqueue *scrub_nocow_workers; 1033 struct btrfs_workqueue *scrub_parity_workers; 1034 1035 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1036 u32 check_integrity_print_mask; 1037 #endif 1038 /* is qgroup tracking in a consistent state? */ 1039 u64 qgroup_flags; 1040 1041 /* holds configuration and tracking. Protected by qgroup_lock */ 1042 struct rb_root qgroup_tree; 1043 struct rb_root qgroup_op_tree; 1044 spinlock_t qgroup_lock; 1045 spinlock_t qgroup_op_lock; 1046 atomic_t qgroup_op_seq; 1047 1048 /* 1049 * used to avoid frequently calling ulist_alloc()/ulist_free() 1050 * when doing qgroup accounting, it must be protected by qgroup_lock. 1051 */ 1052 struct ulist *qgroup_ulist; 1053 1054 /* protect user change for quota operations */ 1055 struct mutex qgroup_ioctl_lock; 1056 1057 /* list of dirty qgroups to be written at next commit */ 1058 struct list_head dirty_qgroups; 1059 1060 /* used by qgroup for an efficient tree traversal */ 1061 u64 qgroup_seq; 1062 1063 /* qgroup rescan items */ 1064 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1065 struct btrfs_key qgroup_rescan_progress; 1066 struct btrfs_workqueue *qgroup_rescan_workers; 1067 struct completion qgroup_rescan_completion; 1068 struct btrfs_work qgroup_rescan_work; 1069 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1070 1071 /* filesystem state */ 1072 unsigned long fs_state; 1073 1074 struct btrfs_delayed_root *delayed_root; 1075 1076 /* readahead tree */ 1077 spinlock_t reada_lock; 1078 struct radix_tree_root reada_tree; 1079 1080 /* readahead works cnt */ 1081 atomic_t reada_works_cnt; 1082 1083 /* Extent buffer radix tree */ 1084 spinlock_t buffer_lock; 1085 struct radix_tree_root buffer_radix; 1086 1087 /* next backup root to be overwritten */ 1088 int backup_root_index; 1089 1090 /* device replace state */ 1091 struct btrfs_dev_replace dev_replace; 1092 1093 struct percpu_counter bio_counter; 1094 wait_queue_head_t replace_wait; 1095 1096 struct semaphore uuid_tree_rescan_sem; 1097 1098 /* Used to reclaim the metadata space in the background. */ 1099 struct work_struct async_reclaim_work; 1100 1101 spinlock_t unused_bgs_lock; 1102 struct list_head unused_bgs; 1103 struct mutex unused_bg_unpin_mutex; 1104 struct mutex delete_unused_bgs_mutex; 1105 1106 /* For btrfs to record security options */ 1107 struct security_mnt_opts security_opts; 1108 1109 /* 1110 * Chunks that can't be freed yet (under a trim/discard operation) 1111 * and will be latter freed. Protected by fs_info->chunk_mutex. 1112 */ 1113 struct list_head pinned_chunks; 1114 1115 /* Cached block sizes */ 1116 u32 nodesize; 1117 u32 sectorsize; 1118 u32 stripesize; 1119 1120 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1121 spinlock_t ref_verify_lock; 1122 struct rb_root block_tree; 1123 #endif 1124 }; 1125 1126 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1127 { 1128 return sb->s_fs_info; 1129 } 1130 1131 struct btrfs_subvolume_writers { 1132 struct percpu_counter counter; 1133 wait_queue_head_t wait; 1134 }; 1135 1136 /* 1137 * The state of btrfs root 1138 */ 1139 /* 1140 * btrfs_record_root_in_trans is a multi-step process, 1141 * and it can race with the balancing code. But the 1142 * race is very small, and only the first time the root 1143 * is added to each transaction. So IN_TRANS_SETUP 1144 * is used to tell us when more checks are required 1145 */ 1146 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1147 #define BTRFS_ROOT_REF_COWS 1 1148 #define BTRFS_ROOT_TRACK_DIRTY 2 1149 #define BTRFS_ROOT_IN_RADIX 3 1150 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1151 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1152 #define BTRFS_ROOT_FORCE_COW 6 1153 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1154 #define BTRFS_ROOT_DIRTY 8 1155 1156 /* 1157 * in ram representation of the tree. extent_root is used for all allocations 1158 * and for the extent tree extent_root root. 1159 */ 1160 struct btrfs_root { 1161 struct extent_buffer *node; 1162 1163 struct extent_buffer *commit_root; 1164 struct btrfs_root *log_root; 1165 struct btrfs_root *reloc_root; 1166 1167 unsigned long state; 1168 struct btrfs_root_item root_item; 1169 struct btrfs_key root_key; 1170 struct btrfs_fs_info *fs_info; 1171 struct extent_io_tree dirty_log_pages; 1172 1173 struct mutex objectid_mutex; 1174 1175 spinlock_t accounting_lock; 1176 struct btrfs_block_rsv *block_rsv; 1177 1178 /* free ino cache stuff */ 1179 struct btrfs_free_space_ctl *free_ino_ctl; 1180 enum btrfs_caching_type ino_cache_state; 1181 spinlock_t ino_cache_lock; 1182 wait_queue_head_t ino_cache_wait; 1183 struct btrfs_free_space_ctl *free_ino_pinned; 1184 u64 ino_cache_progress; 1185 struct inode *ino_cache_inode; 1186 1187 struct mutex log_mutex; 1188 wait_queue_head_t log_writer_wait; 1189 wait_queue_head_t log_commit_wait[2]; 1190 struct list_head log_ctxs[2]; 1191 atomic_t log_writers; 1192 atomic_t log_commit[2]; 1193 atomic_t log_batch; 1194 int log_transid; 1195 /* No matter the commit succeeds or not*/ 1196 int log_transid_committed; 1197 /* Just be updated when the commit succeeds. */ 1198 int last_log_commit; 1199 pid_t log_start_pid; 1200 1201 u64 objectid; 1202 u64 last_trans; 1203 1204 u32 type; 1205 1206 u64 highest_objectid; 1207 1208 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1209 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1210 u64 alloc_bytenr; 1211 #endif 1212 1213 u64 defrag_trans_start; 1214 struct btrfs_key defrag_progress; 1215 struct btrfs_key defrag_max; 1216 char *name; 1217 1218 /* the dirty list is only used by non-reference counted roots */ 1219 struct list_head dirty_list; 1220 1221 struct list_head root_list; 1222 1223 spinlock_t log_extents_lock[2]; 1224 struct list_head logged_list[2]; 1225 1226 int orphan_cleanup_state; 1227 1228 spinlock_t inode_lock; 1229 /* red-black tree that keeps track of in-memory inodes */ 1230 struct rb_root inode_tree; 1231 1232 /* 1233 * radix tree that keeps track of delayed nodes of every inode, 1234 * protected by inode_lock 1235 */ 1236 struct radix_tree_root delayed_nodes_tree; 1237 /* 1238 * right now this just gets used so that a root has its own devid 1239 * for stat. It may be used for more later 1240 */ 1241 dev_t anon_dev; 1242 1243 spinlock_t root_item_lock; 1244 refcount_t refs; 1245 1246 struct mutex delalloc_mutex; 1247 spinlock_t delalloc_lock; 1248 /* 1249 * all of the inodes that have delalloc bytes. It is possible for 1250 * this list to be empty even when there is still dirty data=ordered 1251 * extents waiting to finish IO. 1252 */ 1253 struct list_head delalloc_inodes; 1254 struct list_head delalloc_root; 1255 u64 nr_delalloc_inodes; 1256 1257 struct mutex ordered_extent_mutex; 1258 /* 1259 * this is used by the balancing code to wait for all the pending 1260 * ordered extents 1261 */ 1262 spinlock_t ordered_extent_lock; 1263 1264 /* 1265 * all of the data=ordered extents pending writeback 1266 * these can span multiple transactions and basically include 1267 * every dirty data page that isn't from nodatacow 1268 */ 1269 struct list_head ordered_extents; 1270 struct list_head ordered_root; 1271 u64 nr_ordered_extents; 1272 1273 /* 1274 * Number of currently running SEND ioctls to prevent 1275 * manipulation with the read-only status via SUBVOL_SETFLAGS 1276 */ 1277 int send_in_progress; 1278 struct btrfs_subvolume_writers *subv_writers; 1279 atomic_t will_be_snapshotted; 1280 1281 /* For qgroup metadata reserved space */ 1282 spinlock_t qgroup_meta_rsv_lock; 1283 u64 qgroup_meta_rsv_pertrans; 1284 u64 qgroup_meta_rsv_prealloc; 1285 }; 1286 1287 struct btrfs_file_private { 1288 void *filldir_buf; 1289 }; 1290 1291 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1292 { 1293 return btrfs_sb(inode->i_sb)->sectorsize; 1294 } 1295 1296 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1297 { 1298 1299 return info->nodesize - sizeof(struct btrfs_header); 1300 } 1301 1302 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1303 1304 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1305 { 1306 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1307 } 1308 1309 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1310 { 1311 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1312 } 1313 1314 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1315 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1316 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1317 { 1318 return BTRFS_MAX_ITEM_SIZE(info) - 1319 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1320 } 1321 1322 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1323 { 1324 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1325 } 1326 1327 /* 1328 * Flags for mount options. 1329 * 1330 * Note: don't forget to add new options to btrfs_show_options() 1331 */ 1332 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1333 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1334 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1335 #define BTRFS_MOUNT_SSD (1 << 3) 1336 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1337 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1338 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1339 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1340 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1341 #define BTRFS_MOUNT_NOSSD (1 << 9) 1342 #define BTRFS_MOUNT_DISCARD (1 << 10) 1343 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1344 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1345 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1346 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1347 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1348 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1349 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1350 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1351 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1352 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1353 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1354 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1355 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1356 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1357 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1358 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1359 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1360 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1361 1362 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1363 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1364 1365 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1366 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1367 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1368 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1369 BTRFS_MOUNT_##opt) 1370 1371 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1372 { \ 1373 if (!btrfs_test_opt(fs_info, opt)) \ 1374 btrfs_info(fs_info, fmt, ##args); \ 1375 btrfs_set_opt(fs_info->mount_opt, opt); \ 1376 } 1377 1378 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1379 { \ 1380 if (btrfs_test_opt(fs_info, opt)) \ 1381 btrfs_info(fs_info, fmt, ##args); \ 1382 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1383 } 1384 1385 #ifdef CONFIG_BTRFS_DEBUG 1386 static inline int 1387 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1388 { 1389 struct btrfs_fs_info *fs_info = block_group->fs_info; 1390 1391 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1392 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1393 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1394 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1395 } 1396 #endif 1397 1398 /* 1399 * Requests for changes that need to be done during transaction commit. 1400 * 1401 * Internal mount options that are used for special handling of the real 1402 * mount options (eg. cannot be set during remount and have to be set during 1403 * transaction commit) 1404 */ 1405 1406 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1407 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1408 #define BTRFS_PENDING_COMMIT (2) 1409 1410 #define btrfs_test_pending(info, opt) \ 1411 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1412 #define btrfs_set_pending(info, opt) \ 1413 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1414 #define btrfs_clear_pending(info, opt) \ 1415 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1416 1417 /* 1418 * Helpers for setting pending mount option changes. 1419 * 1420 * Expects corresponding macros 1421 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1422 */ 1423 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1424 do { \ 1425 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1426 btrfs_info((info), fmt, ##args); \ 1427 btrfs_set_pending((info), SET_##opt); \ 1428 btrfs_clear_pending((info), CLEAR_##opt); \ 1429 } \ 1430 } while(0) 1431 1432 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1433 do { \ 1434 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1435 btrfs_info((info), fmt, ##args); \ 1436 btrfs_set_pending((info), CLEAR_##opt); \ 1437 btrfs_clear_pending((info), SET_##opt); \ 1438 } \ 1439 } while(0) 1440 1441 /* 1442 * Inode flags 1443 */ 1444 #define BTRFS_INODE_NODATASUM (1 << 0) 1445 #define BTRFS_INODE_NODATACOW (1 << 1) 1446 #define BTRFS_INODE_READONLY (1 << 2) 1447 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1448 #define BTRFS_INODE_PREALLOC (1 << 4) 1449 #define BTRFS_INODE_SYNC (1 << 5) 1450 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1451 #define BTRFS_INODE_APPEND (1 << 7) 1452 #define BTRFS_INODE_NODUMP (1 << 8) 1453 #define BTRFS_INODE_NOATIME (1 << 9) 1454 #define BTRFS_INODE_DIRSYNC (1 << 10) 1455 #define BTRFS_INODE_COMPRESS (1 << 11) 1456 1457 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1458 1459 struct btrfs_map_token { 1460 const struct extent_buffer *eb; 1461 char *kaddr; 1462 unsigned long offset; 1463 }; 1464 1465 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1466 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1467 1468 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1469 { 1470 token->kaddr = NULL; 1471 } 1472 1473 /* some macros to generate set/get functions for the struct fields. This 1474 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1475 * one for u8: 1476 */ 1477 #define le8_to_cpu(v) (v) 1478 #define cpu_to_le8(v) (v) 1479 #define __le8 u8 1480 1481 #define read_eb_member(eb, ptr, type, member, result) (\ 1482 read_extent_buffer(eb, (char *)(result), \ 1483 ((unsigned long)(ptr)) + \ 1484 offsetof(type, member), \ 1485 sizeof(((type *)0)->member))) 1486 1487 #define write_eb_member(eb, ptr, type, member, result) (\ 1488 write_extent_buffer(eb, (char *)(result), \ 1489 ((unsigned long)(ptr)) + \ 1490 offsetof(type, member), \ 1491 sizeof(((type *)0)->member))) 1492 1493 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1494 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1495 const void *ptr, unsigned long off, \ 1496 struct btrfs_map_token *token); \ 1497 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1498 unsigned long off, u##bits val, \ 1499 struct btrfs_map_token *token); \ 1500 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1501 const void *ptr, \ 1502 unsigned long off) \ 1503 { \ 1504 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1505 } \ 1506 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1507 unsigned long off, u##bits val) \ 1508 { \ 1509 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1510 } 1511 1512 DECLARE_BTRFS_SETGET_BITS(8) 1513 DECLARE_BTRFS_SETGET_BITS(16) 1514 DECLARE_BTRFS_SETGET_BITS(32) 1515 DECLARE_BTRFS_SETGET_BITS(64) 1516 1517 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1518 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1519 const type *s) \ 1520 { \ 1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1522 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1523 } \ 1524 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1525 u##bits val) \ 1526 { \ 1527 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1528 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1529 } \ 1530 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1531 const type *s, \ 1532 struct btrfs_map_token *token) \ 1533 { \ 1534 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1535 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1536 } \ 1537 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1538 type *s, u##bits val, \ 1539 struct btrfs_map_token *token) \ 1540 { \ 1541 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1542 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1543 } 1544 1545 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1546 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1547 { \ 1548 const type *p = page_address(eb->pages[0]); \ 1549 u##bits res = le##bits##_to_cpu(p->member); \ 1550 return res; \ 1551 } \ 1552 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1553 u##bits val) \ 1554 { \ 1555 type *p = page_address(eb->pages[0]); \ 1556 p->member = cpu_to_le##bits(val); \ 1557 } 1558 1559 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1560 static inline u##bits btrfs_##name(const type *s) \ 1561 { \ 1562 return le##bits##_to_cpu(s->member); \ 1563 } \ 1564 static inline void btrfs_set_##name(type *s, u##bits val) \ 1565 { \ 1566 s->member = cpu_to_le##bits(val); \ 1567 } 1568 1569 1570 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1571 struct btrfs_dev_item *s) 1572 { 1573 BUILD_BUG_ON(sizeof(u64) != 1574 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1575 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1576 total_bytes)); 1577 } 1578 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1579 struct btrfs_dev_item *s, 1580 u64 val) 1581 { 1582 BUILD_BUG_ON(sizeof(u64) != 1583 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1584 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1585 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1586 } 1587 1588 1589 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1590 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1591 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1592 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1593 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1594 start_offset, 64); 1595 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1596 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1597 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1598 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1599 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1600 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1601 1602 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1603 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1604 total_bytes, 64); 1605 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1606 bytes_used, 64); 1607 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1608 io_align, 32); 1609 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1610 io_width, 32); 1611 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1612 sector_size, 32); 1613 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1614 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1615 dev_group, 32); 1616 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1617 seek_speed, 8); 1618 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1619 bandwidth, 8); 1620 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1621 generation, 64); 1622 1623 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1624 { 1625 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1626 } 1627 1628 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1629 { 1630 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1631 } 1632 1633 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1634 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1635 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1636 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1637 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1638 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1639 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1640 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1641 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1642 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1643 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1644 1645 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1646 { 1647 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1648 } 1649 1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1651 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1652 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1653 stripe_len, 64); 1654 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1655 io_align, 32); 1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1657 io_width, 32); 1658 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1659 sector_size, 32); 1660 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1662 num_stripes, 16); 1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1664 sub_stripes, 16); 1665 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1666 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1667 1668 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1669 int nr) 1670 { 1671 unsigned long offset = (unsigned long)c; 1672 offset += offsetof(struct btrfs_chunk, stripe); 1673 offset += nr * sizeof(struct btrfs_stripe); 1674 return (struct btrfs_stripe *)offset; 1675 } 1676 1677 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1678 { 1679 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1680 } 1681 1682 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1683 struct btrfs_chunk *c, int nr) 1684 { 1685 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1686 } 1687 1688 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1689 struct btrfs_chunk *c, int nr) 1690 { 1691 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1692 } 1693 1694 /* struct btrfs_block_group_item */ 1695 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1696 used, 64); 1697 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1698 used, 64); 1699 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1700 struct btrfs_block_group_item, chunk_objectid, 64); 1701 1702 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1703 struct btrfs_block_group_item, chunk_objectid, 64); 1704 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1705 struct btrfs_block_group_item, flags, 64); 1706 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1707 struct btrfs_block_group_item, flags, 64); 1708 1709 /* struct btrfs_free_space_info */ 1710 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1711 extent_count, 32); 1712 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1713 1714 /* struct btrfs_inode_ref */ 1715 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1716 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1717 1718 /* struct btrfs_inode_extref */ 1719 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1720 parent_objectid, 64); 1721 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1722 name_len, 16); 1723 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1724 1725 /* struct btrfs_inode_item */ 1726 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1727 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1728 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1729 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1730 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1731 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1732 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1733 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1734 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1735 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1736 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1737 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1738 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1739 generation, 64); 1740 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1741 sequence, 64); 1742 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1743 transid, 64); 1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1746 nbytes, 64); 1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1748 block_group, 64); 1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1755 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1756 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1757 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1758 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1759 1760 /* struct btrfs_dev_extent */ 1761 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1762 chunk_tree, 64); 1763 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1764 chunk_objectid, 64); 1765 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1766 chunk_offset, 64); 1767 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1768 1769 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1770 { 1771 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1772 return (unsigned long)dev + ptr; 1773 } 1774 1775 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1776 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1777 generation, 64); 1778 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1779 1780 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1781 1782 1783 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1784 1785 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1786 struct btrfs_tree_block_info *item, 1787 struct btrfs_disk_key *key) 1788 { 1789 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1790 } 1791 1792 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1793 struct btrfs_tree_block_info *item, 1794 struct btrfs_disk_key *key) 1795 { 1796 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1797 } 1798 1799 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1800 root, 64); 1801 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1802 objectid, 64); 1803 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1804 offset, 64); 1805 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1806 count, 32); 1807 1808 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1809 count, 32); 1810 1811 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1812 type, 8); 1813 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1814 offset, 64); 1815 1816 static inline u32 btrfs_extent_inline_ref_size(int type) 1817 { 1818 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1819 type == BTRFS_SHARED_BLOCK_REF_KEY) 1820 return sizeof(struct btrfs_extent_inline_ref); 1821 if (type == BTRFS_SHARED_DATA_REF_KEY) 1822 return sizeof(struct btrfs_shared_data_ref) + 1823 sizeof(struct btrfs_extent_inline_ref); 1824 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1825 return sizeof(struct btrfs_extent_data_ref) + 1826 offsetof(struct btrfs_extent_inline_ref, offset); 1827 return 0; 1828 } 1829 1830 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1831 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1832 generation, 64); 1833 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1834 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1835 1836 /* struct btrfs_node */ 1837 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1838 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1839 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1840 blockptr, 64); 1841 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1842 generation, 64); 1843 1844 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1845 { 1846 unsigned long ptr; 1847 ptr = offsetof(struct btrfs_node, ptrs) + 1848 sizeof(struct btrfs_key_ptr) * nr; 1849 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1850 } 1851 1852 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1853 int nr, u64 val) 1854 { 1855 unsigned long ptr; 1856 ptr = offsetof(struct btrfs_node, ptrs) + 1857 sizeof(struct btrfs_key_ptr) * nr; 1858 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1859 } 1860 1861 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1862 { 1863 unsigned long ptr; 1864 ptr = offsetof(struct btrfs_node, ptrs) + 1865 sizeof(struct btrfs_key_ptr) * nr; 1866 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1867 } 1868 1869 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1870 int nr, u64 val) 1871 { 1872 unsigned long ptr; 1873 ptr = offsetof(struct btrfs_node, ptrs) + 1874 sizeof(struct btrfs_key_ptr) * nr; 1875 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1876 } 1877 1878 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1879 { 1880 return offsetof(struct btrfs_node, ptrs) + 1881 sizeof(struct btrfs_key_ptr) * nr; 1882 } 1883 1884 void btrfs_node_key(const struct extent_buffer *eb, 1885 struct btrfs_disk_key *disk_key, int nr); 1886 1887 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1888 struct btrfs_disk_key *disk_key, int nr) 1889 { 1890 unsigned long ptr; 1891 ptr = btrfs_node_key_ptr_offset(nr); 1892 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1893 struct btrfs_key_ptr, key, disk_key); 1894 } 1895 1896 /* struct btrfs_item */ 1897 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1898 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1899 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1900 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1901 1902 static inline unsigned long btrfs_item_nr_offset(int nr) 1903 { 1904 return offsetof(struct btrfs_leaf, items) + 1905 sizeof(struct btrfs_item) * nr; 1906 } 1907 1908 static inline struct btrfs_item *btrfs_item_nr(int nr) 1909 { 1910 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1911 } 1912 1913 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1914 struct btrfs_item *item) 1915 { 1916 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1917 } 1918 1919 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1920 { 1921 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1922 } 1923 1924 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1925 { 1926 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1927 } 1928 1929 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1930 { 1931 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1932 } 1933 1934 static inline void btrfs_item_key(const struct extent_buffer *eb, 1935 struct btrfs_disk_key *disk_key, int nr) 1936 { 1937 struct btrfs_item *item = btrfs_item_nr(nr); 1938 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1939 } 1940 1941 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1942 struct btrfs_disk_key *disk_key, int nr) 1943 { 1944 struct btrfs_item *item = btrfs_item_nr(nr); 1945 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1946 } 1947 1948 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1949 1950 /* 1951 * struct btrfs_root_ref 1952 */ 1953 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1954 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1955 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1956 1957 /* struct btrfs_dir_item */ 1958 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1959 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1960 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1961 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1963 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1964 data_len, 16); 1965 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1966 name_len, 16); 1967 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1968 transid, 64); 1969 1970 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1971 const struct btrfs_dir_item *item, 1972 struct btrfs_disk_key *key) 1973 { 1974 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1975 } 1976 1977 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1978 struct btrfs_dir_item *item, 1979 const struct btrfs_disk_key *key) 1980 { 1981 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1982 } 1983 1984 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1985 num_entries, 64); 1986 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1987 num_bitmaps, 64); 1988 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1989 generation, 64); 1990 1991 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1992 const struct btrfs_free_space_header *h, 1993 struct btrfs_disk_key *key) 1994 { 1995 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1996 } 1997 1998 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1999 struct btrfs_free_space_header *h, 2000 const struct btrfs_disk_key *key) 2001 { 2002 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2003 } 2004 2005 /* struct btrfs_disk_key */ 2006 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2007 objectid, 64); 2008 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2009 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2010 2011 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2012 const struct btrfs_disk_key *disk) 2013 { 2014 cpu->offset = le64_to_cpu(disk->offset); 2015 cpu->type = disk->type; 2016 cpu->objectid = le64_to_cpu(disk->objectid); 2017 } 2018 2019 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2020 const struct btrfs_key *cpu) 2021 { 2022 disk->offset = cpu_to_le64(cpu->offset); 2023 disk->type = cpu->type; 2024 disk->objectid = cpu_to_le64(cpu->objectid); 2025 } 2026 2027 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2028 struct btrfs_key *key, int nr) 2029 { 2030 struct btrfs_disk_key disk_key; 2031 btrfs_node_key(eb, &disk_key, nr); 2032 btrfs_disk_key_to_cpu(key, &disk_key); 2033 } 2034 2035 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2036 struct btrfs_key *key, int nr) 2037 { 2038 struct btrfs_disk_key disk_key; 2039 btrfs_item_key(eb, &disk_key, nr); 2040 btrfs_disk_key_to_cpu(key, &disk_key); 2041 } 2042 2043 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2044 const struct btrfs_dir_item *item, 2045 struct btrfs_key *key) 2046 { 2047 struct btrfs_disk_key disk_key; 2048 btrfs_dir_item_key(eb, item, &disk_key); 2049 btrfs_disk_key_to_cpu(key, &disk_key); 2050 } 2051 2052 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2053 { 2054 return key->type; 2055 } 2056 2057 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2058 { 2059 key->type = val; 2060 } 2061 2062 /* struct btrfs_header */ 2063 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2064 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2065 generation, 64); 2066 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2067 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2068 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2069 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2070 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2071 generation, 64); 2072 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2073 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2074 nritems, 32); 2075 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2076 2077 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2078 { 2079 return (btrfs_header_flags(eb) & flag) == flag; 2080 } 2081 2082 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2083 { 2084 u64 flags = btrfs_header_flags(eb); 2085 btrfs_set_header_flags(eb, flags | flag); 2086 return (flags & flag) == flag; 2087 } 2088 2089 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2090 { 2091 u64 flags = btrfs_header_flags(eb); 2092 btrfs_set_header_flags(eb, flags & ~flag); 2093 return (flags & flag) == flag; 2094 } 2095 2096 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2097 { 2098 u64 flags = btrfs_header_flags(eb); 2099 return flags >> BTRFS_BACKREF_REV_SHIFT; 2100 } 2101 2102 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2103 int rev) 2104 { 2105 u64 flags = btrfs_header_flags(eb); 2106 flags &= ~BTRFS_BACKREF_REV_MASK; 2107 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2108 btrfs_set_header_flags(eb, flags); 2109 } 2110 2111 static inline unsigned long btrfs_header_fsid(void) 2112 { 2113 return offsetof(struct btrfs_header, fsid); 2114 } 2115 2116 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2117 { 2118 return offsetof(struct btrfs_header, chunk_tree_uuid); 2119 } 2120 2121 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2122 { 2123 return btrfs_header_level(eb) == 0; 2124 } 2125 2126 /* struct btrfs_root_item */ 2127 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2128 generation, 64); 2129 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2130 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2131 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2132 2133 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2134 generation, 64); 2135 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2136 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2137 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2138 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2139 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2140 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2141 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2142 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2143 last_snapshot, 64); 2144 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2145 generation_v2, 64); 2146 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2147 ctransid, 64); 2148 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2149 otransid, 64); 2150 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2151 stransid, 64); 2152 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2153 rtransid, 64); 2154 2155 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2156 { 2157 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2158 } 2159 2160 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2161 { 2162 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2163 } 2164 2165 /* struct btrfs_root_backup */ 2166 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2167 tree_root, 64); 2168 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2169 tree_root_gen, 64); 2170 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2171 tree_root_level, 8); 2172 2173 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2174 chunk_root, 64); 2175 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2176 chunk_root_gen, 64); 2177 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2178 chunk_root_level, 8); 2179 2180 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2181 extent_root, 64); 2182 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2183 extent_root_gen, 64); 2184 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2185 extent_root_level, 8); 2186 2187 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2188 fs_root, 64); 2189 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2190 fs_root_gen, 64); 2191 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2192 fs_root_level, 8); 2193 2194 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2195 dev_root, 64); 2196 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2197 dev_root_gen, 64); 2198 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2199 dev_root_level, 8); 2200 2201 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2202 csum_root, 64); 2203 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2204 csum_root_gen, 64); 2205 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2206 csum_root_level, 8); 2207 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2208 total_bytes, 64); 2209 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2210 bytes_used, 64); 2211 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2212 num_devices, 64); 2213 2214 /* struct btrfs_balance_item */ 2215 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2216 2217 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2218 const struct btrfs_balance_item *bi, 2219 struct btrfs_disk_balance_args *ba) 2220 { 2221 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2222 } 2223 2224 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2225 struct btrfs_balance_item *bi, 2226 const struct btrfs_disk_balance_args *ba) 2227 { 2228 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2229 } 2230 2231 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2232 const struct btrfs_balance_item *bi, 2233 struct btrfs_disk_balance_args *ba) 2234 { 2235 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2236 } 2237 2238 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2239 struct btrfs_balance_item *bi, 2240 const struct btrfs_disk_balance_args *ba) 2241 { 2242 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2243 } 2244 2245 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2246 const struct btrfs_balance_item *bi, 2247 struct btrfs_disk_balance_args *ba) 2248 { 2249 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2250 } 2251 2252 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2253 struct btrfs_balance_item *bi, 2254 const struct btrfs_disk_balance_args *ba) 2255 { 2256 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2257 } 2258 2259 static inline void 2260 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2261 const struct btrfs_disk_balance_args *disk) 2262 { 2263 memset(cpu, 0, sizeof(*cpu)); 2264 2265 cpu->profiles = le64_to_cpu(disk->profiles); 2266 cpu->usage = le64_to_cpu(disk->usage); 2267 cpu->devid = le64_to_cpu(disk->devid); 2268 cpu->pstart = le64_to_cpu(disk->pstart); 2269 cpu->pend = le64_to_cpu(disk->pend); 2270 cpu->vstart = le64_to_cpu(disk->vstart); 2271 cpu->vend = le64_to_cpu(disk->vend); 2272 cpu->target = le64_to_cpu(disk->target); 2273 cpu->flags = le64_to_cpu(disk->flags); 2274 cpu->limit = le64_to_cpu(disk->limit); 2275 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2276 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2277 } 2278 2279 static inline void 2280 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2281 const struct btrfs_balance_args *cpu) 2282 { 2283 memset(disk, 0, sizeof(*disk)); 2284 2285 disk->profiles = cpu_to_le64(cpu->profiles); 2286 disk->usage = cpu_to_le64(cpu->usage); 2287 disk->devid = cpu_to_le64(cpu->devid); 2288 disk->pstart = cpu_to_le64(cpu->pstart); 2289 disk->pend = cpu_to_le64(cpu->pend); 2290 disk->vstart = cpu_to_le64(cpu->vstart); 2291 disk->vend = cpu_to_le64(cpu->vend); 2292 disk->target = cpu_to_le64(cpu->target); 2293 disk->flags = cpu_to_le64(cpu->flags); 2294 disk->limit = cpu_to_le64(cpu->limit); 2295 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2296 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2297 } 2298 2299 /* struct btrfs_super_block */ 2300 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2301 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2302 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2303 generation, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2305 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2306 struct btrfs_super_block, sys_chunk_array_size, 32); 2307 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2308 struct btrfs_super_block, chunk_root_generation, 64); 2309 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2310 root_level, 8); 2311 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2312 chunk_root, 64); 2313 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2314 chunk_root_level, 8); 2315 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2316 log_root, 64); 2317 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2318 log_root_transid, 64); 2319 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2320 log_root_level, 8); 2321 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2322 total_bytes, 64); 2323 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2324 bytes_used, 64); 2325 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2326 sectorsize, 32); 2327 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2328 nodesize, 32); 2329 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2330 stripesize, 32); 2331 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2332 root_dir_objectid, 64); 2333 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2334 num_devices, 64); 2335 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2336 compat_flags, 64); 2337 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2338 compat_ro_flags, 64); 2339 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2340 incompat_flags, 64); 2341 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2342 csum_type, 16); 2343 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2344 cache_generation, 64); 2345 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2346 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2347 uuid_tree_generation, 64); 2348 2349 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2350 { 2351 u16 t = btrfs_super_csum_type(s); 2352 /* 2353 * csum type is validated at mount time 2354 */ 2355 return btrfs_csum_sizes[t]; 2356 } 2357 2358 2359 /* 2360 * The leaf data grows from end-to-front in the node. 2361 * this returns the address of the start of the last item, 2362 * which is the stop of the leaf data stack 2363 */ 2364 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2365 const struct extent_buffer *leaf) 2366 { 2367 u32 nr = btrfs_header_nritems(leaf); 2368 2369 if (nr == 0) 2370 return BTRFS_LEAF_DATA_SIZE(fs_info); 2371 return btrfs_item_offset_nr(leaf, nr - 1); 2372 } 2373 2374 /* struct btrfs_file_extent_item */ 2375 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2376 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2377 struct btrfs_file_extent_item, disk_bytenr, 64); 2378 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2379 struct btrfs_file_extent_item, offset, 64); 2380 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2381 struct btrfs_file_extent_item, generation, 64); 2382 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2383 struct btrfs_file_extent_item, num_bytes, 64); 2384 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2385 struct btrfs_file_extent_item, disk_num_bytes, 64); 2386 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2387 struct btrfs_file_extent_item, compression, 8); 2388 2389 static inline unsigned long 2390 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2391 { 2392 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2393 } 2394 2395 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2396 { 2397 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2398 } 2399 2400 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2401 disk_bytenr, 64); 2402 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2403 generation, 64); 2404 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2405 disk_num_bytes, 64); 2406 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2407 offset, 64); 2408 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2409 num_bytes, 64); 2410 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2411 ram_bytes, 64); 2412 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2413 compression, 8); 2414 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2415 encryption, 8); 2416 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2417 other_encoding, 16); 2418 2419 /* 2420 * this returns the number of bytes used by the item on disk, minus the 2421 * size of any extent headers. If a file is compressed on disk, this is 2422 * the compressed size 2423 */ 2424 static inline u32 btrfs_file_extent_inline_item_len( 2425 const struct extent_buffer *eb, 2426 struct btrfs_item *e) 2427 { 2428 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2429 } 2430 2431 /* this returns the number of file bytes represented by the inline item. 2432 * If an item is compressed, this is the uncompressed size 2433 */ 2434 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb, 2435 int slot, 2436 const struct btrfs_file_extent_item *fi) 2437 { 2438 struct btrfs_map_token token; 2439 2440 btrfs_init_map_token(&token); 2441 /* 2442 * return the space used on disk if this item isn't 2443 * compressed or encoded 2444 */ 2445 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2446 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2447 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2448 return btrfs_file_extent_inline_item_len(eb, 2449 btrfs_item_nr(slot)); 2450 } 2451 2452 /* otherwise use the ram bytes field */ 2453 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2454 } 2455 2456 2457 /* btrfs_dev_stats_item */ 2458 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2459 const struct btrfs_dev_stats_item *ptr, 2460 int index) 2461 { 2462 u64 val; 2463 2464 read_extent_buffer(eb, &val, 2465 offsetof(struct btrfs_dev_stats_item, values) + 2466 ((unsigned long)ptr) + (index * sizeof(u64)), 2467 sizeof(val)); 2468 return val; 2469 } 2470 2471 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2472 struct btrfs_dev_stats_item *ptr, 2473 int index, u64 val) 2474 { 2475 write_extent_buffer(eb, &val, 2476 offsetof(struct btrfs_dev_stats_item, values) + 2477 ((unsigned long)ptr) + (index * sizeof(u64)), 2478 sizeof(val)); 2479 } 2480 2481 /* btrfs_qgroup_status_item */ 2482 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2483 generation, 64); 2484 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2485 version, 64); 2486 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2487 flags, 64); 2488 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2489 rescan, 64); 2490 2491 /* btrfs_qgroup_info_item */ 2492 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2493 generation, 64); 2494 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2495 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2496 rfer_cmpr, 64); 2497 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2498 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2499 excl_cmpr, 64); 2500 2501 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2502 struct btrfs_qgroup_info_item, generation, 64); 2503 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2504 rfer, 64); 2505 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2506 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2507 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2508 excl, 64); 2509 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2510 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2511 2512 /* btrfs_qgroup_limit_item */ 2513 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2514 flags, 64); 2515 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2516 max_rfer, 64); 2517 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2518 max_excl, 64); 2519 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2520 rsv_rfer, 64); 2521 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2522 rsv_excl, 64); 2523 2524 /* btrfs_dev_replace_item */ 2525 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2526 struct btrfs_dev_replace_item, src_devid, 64); 2527 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2528 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2529 64); 2530 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2531 replace_state, 64); 2532 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2533 time_started, 64); 2534 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2535 time_stopped, 64); 2536 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2537 num_write_errors, 64); 2538 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2539 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2540 64); 2541 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2542 cursor_left, 64); 2543 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2544 cursor_right, 64); 2545 2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2547 struct btrfs_dev_replace_item, src_devid, 64); 2548 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2549 struct btrfs_dev_replace_item, 2550 cont_reading_from_srcdev_mode, 64); 2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2552 struct btrfs_dev_replace_item, replace_state, 64); 2553 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2554 struct btrfs_dev_replace_item, time_started, 64); 2555 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2556 struct btrfs_dev_replace_item, time_stopped, 64); 2557 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2558 struct btrfs_dev_replace_item, num_write_errors, 64); 2559 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2560 struct btrfs_dev_replace_item, 2561 num_uncorrectable_read_errors, 64); 2562 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2563 struct btrfs_dev_replace_item, cursor_left, 64); 2564 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2565 struct btrfs_dev_replace_item, cursor_right, 64); 2566 2567 /* helper function to cast into the data area of the leaf. */ 2568 #define btrfs_item_ptr(leaf, slot, type) \ 2569 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2570 btrfs_item_offset_nr(leaf, slot))) 2571 2572 #define btrfs_item_ptr_offset(leaf, slot) \ 2573 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2574 btrfs_item_offset_nr(leaf, slot))) 2575 2576 static inline u64 btrfs_name_hash(const char *name, int len) 2577 { 2578 return crc32c((u32)~1, name, len); 2579 } 2580 2581 /* 2582 * Figure the key offset of an extended inode ref 2583 */ 2584 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2585 int len) 2586 { 2587 return (u64) crc32c(parent_objectid, name, len); 2588 } 2589 2590 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2591 { 2592 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2593 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2594 } 2595 2596 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2597 { 2598 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2599 } 2600 2601 /* extent-tree.c */ 2602 2603 enum btrfs_inline_ref_type { 2604 BTRFS_REF_TYPE_INVALID = 0, 2605 BTRFS_REF_TYPE_BLOCK = 1, 2606 BTRFS_REF_TYPE_DATA = 2, 2607 BTRFS_REF_TYPE_ANY = 3, 2608 }; 2609 2610 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2611 struct btrfs_extent_inline_ref *iref, 2612 enum btrfs_inline_ref_type is_data); 2613 2614 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2615 2616 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2617 unsigned num_items) 2618 { 2619 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2620 } 2621 2622 /* 2623 * Doing a truncate won't result in new nodes or leaves, just what we need for 2624 * COW. 2625 */ 2626 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2627 unsigned num_items) 2628 { 2629 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2630 } 2631 2632 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2633 struct btrfs_fs_info *fs_info); 2634 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2635 struct btrfs_fs_info *fs_info); 2636 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2637 const u64 start); 2638 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2639 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2640 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2641 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2642 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2643 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2644 unsigned long count); 2645 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2646 unsigned long count, u64 transid, int wait); 2647 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2648 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2649 struct btrfs_fs_info *fs_info, u64 bytenr, 2650 u64 offset, int metadata, u64 *refs, u64 *flags); 2651 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2652 u64 bytenr, u64 num, int reserved); 2653 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2654 u64 bytenr, u64 num_bytes); 2655 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2656 struct extent_buffer *eb); 2657 int btrfs_cross_ref_exist(struct btrfs_root *root, 2658 u64 objectid, u64 offset, u64 bytenr); 2659 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2660 struct btrfs_fs_info *info, 2661 u64 bytenr); 2662 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2663 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2664 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2665 struct btrfs_root *root, 2666 u64 parent, u64 root_objectid, 2667 const struct btrfs_disk_key *key, 2668 int level, u64 hint, 2669 u64 empty_size); 2670 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2671 struct btrfs_root *root, 2672 struct extent_buffer *buf, 2673 u64 parent, int last_ref); 2674 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2675 struct btrfs_root *root, u64 owner, 2676 u64 offset, u64 ram_bytes, 2677 struct btrfs_key *ins); 2678 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2679 struct btrfs_fs_info *fs_info, 2680 u64 root_objectid, u64 owner, u64 offset, 2681 struct btrfs_key *ins); 2682 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2683 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2684 struct btrfs_key *ins, int is_data, int delalloc); 2685 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2686 struct extent_buffer *buf, int full_backref); 2687 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2688 struct extent_buffer *buf, int full_backref); 2689 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2690 struct btrfs_fs_info *fs_info, 2691 u64 bytenr, u64 num_bytes, u64 flags, 2692 int level, int is_data); 2693 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2694 struct btrfs_root *root, 2695 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2696 u64 owner, u64 offset); 2697 2698 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2699 u64 start, u64 len, int delalloc); 2700 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2701 u64 start, u64 len); 2702 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2703 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2704 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2705 struct btrfs_root *root, 2706 u64 bytenr, u64 num_bytes, u64 parent, 2707 u64 root_objectid, u64 owner, u64 offset); 2708 2709 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2710 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2711 struct btrfs_fs_info *fs_info); 2712 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2713 struct btrfs_fs_info *fs_info); 2714 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2715 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2716 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2717 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2718 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2719 struct btrfs_fs_info *fs_info, u64 bytes_used, 2720 u64 type, u64 chunk_offset, u64 size); 2721 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2722 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2723 struct btrfs_fs_info *fs_info, 2724 const u64 chunk_offset); 2725 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2726 struct btrfs_fs_info *fs_info, u64 group_start, 2727 struct extent_map *em); 2728 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2729 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2730 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2731 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2732 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2733 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2734 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2735 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2736 2737 enum btrfs_reserve_flush_enum { 2738 /* If we are in the transaction, we can't flush anything.*/ 2739 BTRFS_RESERVE_NO_FLUSH, 2740 /* 2741 * Flushing delalloc may cause deadlock somewhere, in this 2742 * case, use FLUSH LIMIT 2743 */ 2744 BTRFS_RESERVE_FLUSH_LIMIT, 2745 BTRFS_RESERVE_FLUSH_ALL, 2746 }; 2747 2748 enum btrfs_flush_state { 2749 FLUSH_DELAYED_ITEMS_NR = 1, 2750 FLUSH_DELAYED_ITEMS = 2, 2751 FLUSH_DELALLOC = 3, 2752 FLUSH_DELALLOC_WAIT = 4, 2753 ALLOC_CHUNK = 5, 2754 COMMIT_TRANS = 6, 2755 }; 2756 2757 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2758 int btrfs_check_data_free_space(struct inode *inode, 2759 struct extent_changeset **reserved, u64 start, u64 len); 2760 void btrfs_free_reserved_data_space(struct inode *inode, 2761 struct extent_changeset *reserved, u64 start, u64 len); 2762 void btrfs_delalloc_release_space(struct inode *inode, 2763 struct extent_changeset *reserved, 2764 u64 start, u64 len, bool qgroup_free); 2765 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2766 u64 len); 2767 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2768 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2769 struct btrfs_block_rsv *rsv, 2770 int nitems, bool use_global_rsv); 2771 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2772 struct btrfs_block_rsv *rsv); 2773 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2774 bool qgroup_free); 2775 2776 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2777 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2778 bool qgroup_free); 2779 int btrfs_delalloc_reserve_space(struct inode *inode, 2780 struct extent_changeset **reserved, u64 start, u64 len); 2781 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2782 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2783 unsigned short type); 2784 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2785 struct btrfs_block_rsv *rsv, 2786 unsigned short type); 2787 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2788 struct btrfs_block_rsv *rsv); 2789 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2790 int btrfs_block_rsv_add(struct btrfs_root *root, 2791 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2792 enum btrfs_reserve_flush_enum flush); 2793 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2794 int btrfs_block_rsv_refill(struct btrfs_root *root, 2795 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2796 enum btrfs_reserve_flush_enum flush); 2797 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2798 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2799 int update_size); 2800 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2801 struct btrfs_block_rsv *dest, u64 num_bytes, 2802 int min_factor); 2803 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2804 struct btrfs_block_rsv *block_rsv, 2805 u64 num_bytes); 2806 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2807 struct btrfs_block_group_cache *cache); 2808 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2809 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2810 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2811 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2812 u64 start, u64 end); 2813 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2814 u64 num_bytes, u64 *actual_bytes); 2815 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2816 struct btrfs_fs_info *fs_info, u64 type); 2817 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2818 2819 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2820 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2821 struct btrfs_fs_info *fs_info); 2822 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2823 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2824 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2825 void check_system_chunk(struct btrfs_trans_handle *trans, 2826 struct btrfs_fs_info *fs_info, const u64 type); 2827 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2828 u64 start, u64 end); 2829 2830 /* ctree.c */ 2831 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2832 int level, int *slot); 2833 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2834 int btrfs_previous_item(struct btrfs_root *root, 2835 struct btrfs_path *path, u64 min_objectid, 2836 int type); 2837 int btrfs_previous_extent_item(struct btrfs_root *root, 2838 struct btrfs_path *path, u64 min_objectid); 2839 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2840 struct btrfs_path *path, 2841 const struct btrfs_key *new_key); 2842 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2843 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2844 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2845 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2846 struct btrfs_key *key, int lowest_level, 2847 u64 min_trans); 2848 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2849 struct btrfs_path *path, 2850 u64 min_trans); 2851 enum btrfs_compare_tree_result { 2852 BTRFS_COMPARE_TREE_NEW, 2853 BTRFS_COMPARE_TREE_DELETED, 2854 BTRFS_COMPARE_TREE_CHANGED, 2855 BTRFS_COMPARE_TREE_SAME, 2856 }; 2857 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2858 struct btrfs_path *right_path, 2859 struct btrfs_key *key, 2860 enum btrfs_compare_tree_result result, 2861 void *ctx); 2862 int btrfs_compare_trees(struct btrfs_root *left_root, 2863 struct btrfs_root *right_root, 2864 btrfs_changed_cb_t cb, void *ctx); 2865 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2866 struct btrfs_root *root, struct extent_buffer *buf, 2867 struct extent_buffer *parent, int parent_slot, 2868 struct extent_buffer **cow_ret); 2869 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2870 struct btrfs_root *root, 2871 struct extent_buffer *buf, 2872 struct extent_buffer **cow_ret, u64 new_root_objectid); 2873 int btrfs_block_can_be_shared(struct btrfs_root *root, 2874 struct extent_buffer *buf); 2875 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2876 u32 data_size); 2877 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2878 struct btrfs_path *path, u32 new_size, int from_end); 2879 int btrfs_split_item(struct btrfs_trans_handle *trans, 2880 struct btrfs_root *root, 2881 struct btrfs_path *path, 2882 const struct btrfs_key *new_key, 2883 unsigned long split_offset); 2884 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2885 struct btrfs_root *root, 2886 struct btrfs_path *path, 2887 const struct btrfs_key *new_key); 2888 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2889 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2890 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2891 const struct btrfs_key *key, struct btrfs_path *p, 2892 int ins_len, int cow); 2893 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2894 struct btrfs_path *p, u64 time_seq); 2895 int btrfs_search_slot_for_read(struct btrfs_root *root, 2896 const struct btrfs_key *key, 2897 struct btrfs_path *p, int find_higher, 2898 int return_any); 2899 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2900 struct btrfs_root *root, struct extent_buffer *parent, 2901 int start_slot, u64 *last_ret, 2902 struct btrfs_key *progress); 2903 void btrfs_release_path(struct btrfs_path *p); 2904 struct btrfs_path *btrfs_alloc_path(void); 2905 void btrfs_free_path(struct btrfs_path *p); 2906 void btrfs_set_path_blocking(struct btrfs_path *p); 2907 void btrfs_clear_path_blocking(struct btrfs_path *p, 2908 struct extent_buffer *held, int held_rw); 2909 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2910 2911 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2912 struct btrfs_path *path, int slot, int nr); 2913 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2914 struct btrfs_root *root, 2915 struct btrfs_path *path) 2916 { 2917 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2918 } 2919 2920 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2921 const struct btrfs_key *cpu_key, u32 *data_size, 2922 u32 total_data, u32 total_size, int nr); 2923 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2924 const struct btrfs_key *key, void *data, u32 data_size); 2925 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2926 struct btrfs_root *root, 2927 struct btrfs_path *path, 2928 const struct btrfs_key *cpu_key, u32 *data_size, 2929 int nr); 2930 2931 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2932 struct btrfs_root *root, 2933 struct btrfs_path *path, 2934 const struct btrfs_key *key, 2935 u32 data_size) 2936 { 2937 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2938 } 2939 2940 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2941 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2942 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2943 u64 time_seq); 2944 static inline int btrfs_next_old_item(struct btrfs_root *root, 2945 struct btrfs_path *p, u64 time_seq) 2946 { 2947 ++p->slots[0]; 2948 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2949 return btrfs_next_old_leaf(root, p, time_seq); 2950 return 0; 2951 } 2952 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2953 { 2954 return btrfs_next_old_item(root, p, 0); 2955 } 2956 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2957 struct extent_buffer *leaf); 2958 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2959 struct btrfs_block_rsv *block_rsv, 2960 int update_ref, int for_reloc); 2961 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2962 struct btrfs_root *root, 2963 struct extent_buffer *node, 2964 struct extent_buffer *parent); 2965 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2966 { 2967 /* 2968 * Do it this way so we only ever do one test_bit in the normal case. 2969 */ 2970 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2971 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2972 return 2; 2973 return 1; 2974 } 2975 return 0; 2976 } 2977 2978 /* 2979 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2980 * anything except sleeping. This function is used to check the status of 2981 * the fs. 2982 */ 2983 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2984 { 2985 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2986 } 2987 2988 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2989 { 2990 kfree(fs_info->balance_ctl); 2991 kfree(fs_info->delayed_root); 2992 kfree(fs_info->extent_root); 2993 kfree(fs_info->tree_root); 2994 kfree(fs_info->chunk_root); 2995 kfree(fs_info->dev_root); 2996 kfree(fs_info->csum_root); 2997 kfree(fs_info->quota_root); 2998 kfree(fs_info->uuid_root); 2999 kfree(fs_info->free_space_root); 3000 kfree(fs_info->super_copy); 3001 kfree(fs_info->super_for_commit); 3002 security_free_mnt_opts(&fs_info->security_opts); 3003 kvfree(fs_info); 3004 } 3005 3006 /* tree mod log functions from ctree.c */ 3007 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 3008 struct seq_list *elem); 3009 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 3010 struct seq_list *elem); 3011 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 3012 3013 /* root-item.c */ 3014 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 3015 struct btrfs_fs_info *fs_info, 3016 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 3017 const char *name, int name_len); 3018 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 3019 struct btrfs_fs_info *fs_info, 3020 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 3021 const char *name, int name_len); 3022 int btrfs_del_root(struct btrfs_trans_handle *trans, 3023 struct btrfs_fs_info *fs_info, const struct btrfs_key *key); 3024 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 3025 const struct btrfs_key *key, 3026 struct btrfs_root_item *item); 3027 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3028 struct btrfs_root *root, 3029 struct btrfs_key *key, 3030 struct btrfs_root_item *item); 3031 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3032 struct btrfs_path *path, struct btrfs_root_item *root_item, 3033 struct btrfs_key *root_key); 3034 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3035 void btrfs_set_root_node(struct btrfs_root_item *item, 3036 struct extent_buffer *node); 3037 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3038 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3039 struct btrfs_root *root); 3040 3041 /* uuid-tree.c */ 3042 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3043 u64 subid); 3044 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3045 u64 subid); 3046 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3047 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3048 u64)); 3049 3050 /* dir-item.c */ 3051 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3052 const char *name, int name_len); 3053 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3054 struct btrfs_root *root, const char *name, 3055 int name_len, struct btrfs_inode *dir, 3056 struct btrfs_key *location, u8 type, u64 index); 3057 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3058 struct btrfs_root *root, 3059 struct btrfs_path *path, u64 dir, 3060 const char *name, int name_len, 3061 int mod); 3062 struct btrfs_dir_item * 3063 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3064 struct btrfs_root *root, 3065 struct btrfs_path *path, u64 dir, 3066 u64 objectid, const char *name, int name_len, 3067 int mod); 3068 struct btrfs_dir_item * 3069 btrfs_search_dir_index_item(struct btrfs_root *root, 3070 struct btrfs_path *path, u64 dirid, 3071 const char *name, int name_len); 3072 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3073 struct btrfs_root *root, 3074 struct btrfs_path *path, 3075 struct btrfs_dir_item *di); 3076 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3077 struct btrfs_root *root, 3078 struct btrfs_path *path, u64 objectid, 3079 const char *name, u16 name_len, 3080 const void *data, u16 data_len); 3081 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3082 struct btrfs_root *root, 3083 struct btrfs_path *path, u64 dir, 3084 const char *name, u16 name_len, 3085 int mod); 3086 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3087 struct btrfs_path *path, 3088 const char *name, 3089 int name_len); 3090 3091 /* orphan.c */ 3092 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3093 struct btrfs_root *root, u64 offset); 3094 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3095 struct btrfs_root *root, u64 offset); 3096 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3097 3098 /* inode-item.c */ 3099 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3100 struct btrfs_root *root, 3101 const char *name, int name_len, 3102 u64 inode_objectid, u64 ref_objectid, u64 index); 3103 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3104 struct btrfs_root *root, 3105 const char *name, int name_len, 3106 u64 inode_objectid, u64 ref_objectid, u64 *index); 3107 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3108 struct btrfs_root *root, 3109 struct btrfs_path *path, u64 objectid); 3110 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3111 *root, struct btrfs_path *path, 3112 struct btrfs_key *location, int mod); 3113 3114 struct btrfs_inode_extref * 3115 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3116 struct btrfs_root *root, 3117 struct btrfs_path *path, 3118 const char *name, int name_len, 3119 u64 inode_objectid, u64 ref_objectid, int ins_len, 3120 int cow); 3121 3122 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3123 const char *name, 3124 int name_len, struct btrfs_inode_ref **ref_ret); 3125 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3126 u64 ref_objectid, const char *name, 3127 int name_len, 3128 struct btrfs_inode_extref **extref_ret); 3129 3130 /* file-item.c */ 3131 struct btrfs_dio_private; 3132 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3133 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3134 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3135 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3136 u64 logical_offset); 3137 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3138 struct btrfs_root *root, 3139 u64 objectid, u64 pos, 3140 u64 disk_offset, u64 disk_num_bytes, 3141 u64 num_bytes, u64 offset, u64 ram_bytes, 3142 u8 compression, u8 encryption, u16 other_encoding); 3143 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3144 struct btrfs_root *root, 3145 struct btrfs_path *path, u64 objectid, 3146 u64 bytenr, int mod); 3147 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3148 struct btrfs_root *root, 3149 struct btrfs_ordered_sum *sums); 3150 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3151 u64 file_start, int contig); 3152 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3153 struct list_head *list, int search_commit); 3154 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3155 const struct btrfs_path *path, 3156 struct btrfs_file_extent_item *fi, 3157 const bool new_inline, 3158 struct extent_map *em); 3159 3160 /* inode.c */ 3161 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3162 struct page *page, size_t pg_offset, u64 start, 3163 u64 len, int create); 3164 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3165 u64 *orig_start, u64 *orig_block_len, 3166 u64 *ram_bytes); 3167 3168 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3169 struct btrfs_inode *inode); 3170 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3171 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3172 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3173 struct btrfs_root *root, 3174 struct btrfs_inode *dir, struct btrfs_inode *inode, 3175 const char *name, int name_len); 3176 int btrfs_add_link(struct btrfs_trans_handle *trans, 3177 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3178 const char *name, int name_len, int add_backref, u64 index); 3179 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3180 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3181 int front); 3182 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3183 struct btrfs_root *root, 3184 struct inode *inode, u64 new_size, 3185 u32 min_type); 3186 3187 int btrfs_start_delalloc_inodes(struct btrfs_root *root); 3188 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3189 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3190 unsigned int extra_bits, 3191 struct extent_state **cached_state, int dedupe); 3192 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3193 struct btrfs_root *new_root, 3194 struct btrfs_root *parent_root, 3195 u64 new_dirid); 3196 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3197 size_t size, struct bio *bio, 3198 unsigned long bio_flags); 3199 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3200 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3201 int btrfs_readpage(struct file *file, struct page *page); 3202 void btrfs_evict_inode(struct inode *inode); 3203 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3204 struct inode *btrfs_alloc_inode(struct super_block *sb); 3205 void btrfs_destroy_inode(struct inode *inode); 3206 int btrfs_drop_inode(struct inode *inode); 3207 int __init btrfs_init_cachep(void); 3208 void __cold btrfs_destroy_cachep(void); 3209 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3210 struct btrfs_root *root, int *was_new); 3211 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3212 struct page *page, size_t pg_offset, 3213 u64 start, u64 end, int create); 3214 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3215 struct btrfs_root *root, 3216 struct inode *inode); 3217 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3218 struct btrfs_root *root, struct inode *inode); 3219 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3220 struct btrfs_inode *inode); 3221 int btrfs_orphan_cleanup(struct btrfs_root *root); 3222 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3223 void btrfs_add_delayed_iput(struct inode *inode); 3224 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3225 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3226 u64 start, u64 num_bytes, u64 min_size, 3227 loff_t actual_len, u64 *alloc_hint); 3228 int btrfs_prealloc_file_range_trans(struct inode *inode, 3229 struct btrfs_trans_handle *trans, int mode, 3230 u64 start, u64 num_bytes, u64 min_size, 3231 loff_t actual_len, u64 *alloc_hint); 3232 extern const struct dentry_operations btrfs_dentry_operations; 3233 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3234 void btrfs_test_inode_set_ops(struct inode *inode); 3235 #endif 3236 3237 /* ioctl.c */ 3238 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3239 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3240 int btrfs_ioctl_get_supported_features(void __user *arg); 3241 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3242 int btrfs_is_empty_uuid(u8 *uuid); 3243 int btrfs_defrag_file(struct inode *inode, struct file *file, 3244 struct btrfs_ioctl_defrag_range_args *range, 3245 u64 newer_than, unsigned long max_pages); 3246 void btrfs_get_block_group_info(struct list_head *groups_list, 3247 struct btrfs_ioctl_space_info *space); 3248 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3249 struct btrfs_ioctl_balance_args *bargs); 3250 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3251 struct file *dst_file, u64 dst_loff); 3252 3253 /* file.c */ 3254 int __init btrfs_auto_defrag_init(void); 3255 void __cold btrfs_auto_defrag_exit(void); 3256 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3257 struct btrfs_inode *inode); 3258 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3259 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3260 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3261 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3262 int skip_pinned); 3263 extern const struct file_operations btrfs_file_operations; 3264 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3265 struct btrfs_root *root, struct inode *inode, 3266 struct btrfs_path *path, u64 start, u64 end, 3267 u64 *drop_end, int drop_cache, 3268 int replace_extent, 3269 u32 extent_item_size, 3270 int *key_inserted); 3271 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3272 struct btrfs_root *root, struct inode *inode, u64 start, 3273 u64 end, int drop_cache); 3274 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3275 struct btrfs_inode *inode, u64 start, u64 end); 3276 int btrfs_release_file(struct inode *inode, struct file *file); 3277 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3278 size_t num_pages, loff_t pos, size_t write_bytes, 3279 struct extent_state **cached); 3280 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3281 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3282 struct file *file_out, loff_t pos_out, u64 len); 3283 3284 /* tree-defrag.c */ 3285 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3286 struct btrfs_root *root); 3287 3288 /* sysfs.c */ 3289 int __init btrfs_init_sysfs(void); 3290 void __cold btrfs_exit_sysfs(void); 3291 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3292 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3293 3294 /* super.c */ 3295 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3296 unsigned long new_flags); 3297 int btrfs_sync_fs(struct super_block *sb, int wait); 3298 3299 static inline __printf(2, 3) __cold 3300 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3301 { 3302 } 3303 3304 #ifdef CONFIG_PRINTK 3305 __printf(2, 3) 3306 __cold 3307 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3308 #else 3309 #define btrfs_printk(fs_info, fmt, args...) \ 3310 btrfs_no_printk(fs_info, fmt, ##args) 3311 #endif 3312 3313 #define btrfs_emerg(fs_info, fmt, args...) \ 3314 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3315 #define btrfs_alert(fs_info, fmt, args...) \ 3316 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3317 #define btrfs_crit(fs_info, fmt, args...) \ 3318 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3319 #define btrfs_err(fs_info, fmt, args...) \ 3320 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3321 #define btrfs_warn(fs_info, fmt, args...) \ 3322 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3323 #define btrfs_notice(fs_info, fmt, args...) \ 3324 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3325 #define btrfs_info(fs_info, fmt, args...) \ 3326 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3327 3328 /* 3329 * Wrappers that use printk_in_rcu 3330 */ 3331 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3332 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3333 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3334 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3335 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3336 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3337 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3338 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3339 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3340 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3341 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3342 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3343 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3344 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3345 3346 /* 3347 * Wrappers that use a ratelimited printk_in_rcu 3348 */ 3349 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3350 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3351 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3352 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3353 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3354 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3355 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3356 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3357 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3358 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3359 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3360 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3361 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3362 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3363 3364 /* 3365 * Wrappers that use a ratelimited printk 3366 */ 3367 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3368 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3369 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3370 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3371 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3372 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3373 #define btrfs_err_rl(fs_info, fmt, args...) \ 3374 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3375 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3376 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3377 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3378 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3379 #define btrfs_info_rl(fs_info, fmt, args...) \ 3380 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3381 3382 #if defined(CONFIG_DYNAMIC_DEBUG) 3383 #define btrfs_debug(fs_info, fmt, args...) \ 3384 do { \ 3385 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3386 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3387 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3388 } while (0) 3389 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3390 do { \ 3391 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3392 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3393 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3394 } while (0) 3395 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3396 do { \ 3397 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3398 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3399 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3400 ##args);\ 3401 } while (0) 3402 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3403 do { \ 3404 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3405 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3406 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3407 ##args); \ 3408 } while (0) 3409 #elif defined(DEBUG) 3410 #define btrfs_debug(fs_info, fmt, args...) \ 3411 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3412 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3413 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3414 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3415 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3416 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3417 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3418 #else 3419 #define btrfs_debug(fs_info, fmt, args...) \ 3420 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3421 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3422 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3423 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3424 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3425 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3426 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3427 #endif 3428 3429 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3430 do { \ 3431 rcu_read_lock(); \ 3432 btrfs_printk(fs_info, fmt, ##args); \ 3433 rcu_read_unlock(); \ 3434 } while (0) 3435 3436 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3437 do { \ 3438 static DEFINE_RATELIMIT_STATE(_rs, \ 3439 DEFAULT_RATELIMIT_INTERVAL, \ 3440 DEFAULT_RATELIMIT_BURST); \ 3441 if (__ratelimit(&_rs)) \ 3442 btrfs_printk(fs_info, fmt, ##args); \ 3443 } while (0) 3444 3445 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3446 do { \ 3447 rcu_read_lock(); \ 3448 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3449 rcu_read_unlock(); \ 3450 } while (0) 3451 3452 #ifdef CONFIG_BTRFS_ASSERT 3453 3454 __cold 3455 static inline void assfail(char *expr, char *file, int line) 3456 { 3457 pr_err("assertion failed: %s, file: %s, line: %d\n", 3458 expr, file, line); 3459 BUG(); 3460 } 3461 3462 #define ASSERT(expr) \ 3463 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3464 #else 3465 #define ASSERT(expr) ((void)0) 3466 #endif 3467 3468 __printf(5, 6) 3469 __cold 3470 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3471 unsigned int line, int errno, const char *fmt, ...); 3472 3473 const char *btrfs_decode_error(int errno); 3474 3475 __cold 3476 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3477 const char *function, 3478 unsigned int line, int errno); 3479 3480 /* 3481 * Call btrfs_abort_transaction as early as possible when an error condition is 3482 * detected, that way the exact line number is reported. 3483 */ 3484 #define btrfs_abort_transaction(trans, errno) \ 3485 do { \ 3486 /* Report first abort since mount */ \ 3487 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3488 &((trans)->fs_info->fs_state))) { \ 3489 if ((errno) != -EIO) { \ 3490 WARN(1, KERN_DEBUG \ 3491 "BTRFS: Transaction aborted (error %d)\n", \ 3492 (errno)); \ 3493 } else { \ 3494 btrfs_debug((trans)->fs_info, \ 3495 "Transaction aborted (error %d)", \ 3496 (errno)); \ 3497 } \ 3498 } \ 3499 __btrfs_abort_transaction((trans), __func__, \ 3500 __LINE__, (errno)); \ 3501 } while (0) 3502 3503 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3504 do { \ 3505 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3506 (errno), fmt, ##args); \ 3507 } while (0) 3508 3509 __printf(5, 6) 3510 __cold 3511 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3512 unsigned int line, int errno, const char *fmt, ...); 3513 /* 3514 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3515 * will panic(). Otherwise we BUG() here. 3516 */ 3517 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3518 do { \ 3519 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3520 BUG(); \ 3521 } while (0) 3522 3523 3524 /* compatibility and incompatibility defines */ 3525 3526 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3527 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3528 3529 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3530 u64 flag) 3531 { 3532 struct btrfs_super_block *disk_super; 3533 u64 features; 3534 3535 disk_super = fs_info->super_copy; 3536 features = btrfs_super_incompat_flags(disk_super); 3537 if (!(features & flag)) { 3538 spin_lock(&fs_info->super_lock); 3539 features = btrfs_super_incompat_flags(disk_super); 3540 if (!(features & flag)) { 3541 features |= flag; 3542 btrfs_set_super_incompat_flags(disk_super, features); 3543 btrfs_info(fs_info, "setting %llu feature flag", 3544 flag); 3545 } 3546 spin_unlock(&fs_info->super_lock); 3547 } 3548 } 3549 3550 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3551 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3552 3553 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3554 u64 flag) 3555 { 3556 struct btrfs_super_block *disk_super; 3557 u64 features; 3558 3559 disk_super = fs_info->super_copy; 3560 features = btrfs_super_incompat_flags(disk_super); 3561 if (features & flag) { 3562 spin_lock(&fs_info->super_lock); 3563 features = btrfs_super_incompat_flags(disk_super); 3564 if (features & flag) { 3565 features &= ~flag; 3566 btrfs_set_super_incompat_flags(disk_super, features); 3567 btrfs_info(fs_info, "clearing %llu feature flag", 3568 flag); 3569 } 3570 spin_unlock(&fs_info->super_lock); 3571 } 3572 } 3573 3574 #define btrfs_fs_incompat(fs_info, opt) \ 3575 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3576 3577 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3578 { 3579 struct btrfs_super_block *disk_super; 3580 disk_super = fs_info->super_copy; 3581 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3582 } 3583 3584 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3585 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3586 3587 static inline void __btrfs_set_fs_compat_ro(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_compat_ro_flags(disk_super); 3595 if (!(features & flag)) { 3596 spin_lock(&fs_info->super_lock); 3597 features = btrfs_super_compat_ro_flags(disk_super); 3598 if (!(features & flag)) { 3599 features |= flag; 3600 btrfs_set_super_compat_ro_flags(disk_super, features); 3601 btrfs_info(fs_info, "setting %llu ro feature flag", 3602 flag); 3603 } 3604 spin_unlock(&fs_info->super_lock); 3605 } 3606 } 3607 3608 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3609 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3610 3611 static inline void __btrfs_clear_fs_compat_ro(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_compat_ro_flags(disk_super); 3619 if (features & flag) { 3620 spin_lock(&fs_info->super_lock); 3621 features = btrfs_super_compat_ro_flags(disk_super); 3622 if (features & flag) { 3623 features &= ~flag; 3624 btrfs_set_super_compat_ro_flags(disk_super, features); 3625 btrfs_info(fs_info, "clearing %llu ro feature flag", 3626 flag); 3627 } 3628 spin_unlock(&fs_info->super_lock); 3629 } 3630 } 3631 3632 #define btrfs_fs_compat_ro(fs_info, opt) \ 3633 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3634 3635 static inline int __btrfs_fs_compat_ro(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_compat_ro_flags(disk_super) & flag); 3640 } 3641 3642 /* acl.c */ 3643 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3644 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3645 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3646 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3647 struct inode *inode, struct inode *dir); 3648 #else 3649 #define btrfs_get_acl NULL 3650 #define btrfs_set_acl NULL 3651 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3652 struct inode *inode, struct inode *dir) 3653 { 3654 return 0; 3655 } 3656 #endif 3657 3658 /* relocation.c */ 3659 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3660 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3661 struct btrfs_root *root); 3662 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3663 struct btrfs_root *root); 3664 int btrfs_recover_relocation(struct btrfs_root *root); 3665 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3666 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3667 struct btrfs_root *root, struct extent_buffer *buf, 3668 struct extent_buffer *cow); 3669 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3670 u64 *bytes_to_reserve); 3671 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3672 struct btrfs_pending_snapshot *pending); 3673 3674 /* scrub.c */ 3675 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3676 u64 end, struct btrfs_scrub_progress *progress, 3677 int readonly, int is_dev_replace); 3678 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3679 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3680 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3681 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3682 struct btrfs_device *dev); 3683 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3684 struct btrfs_scrub_progress *progress); 3685 static inline void btrfs_init_full_stripe_locks_tree( 3686 struct btrfs_full_stripe_locks_tree *locks_root) 3687 { 3688 locks_root->root = RB_ROOT; 3689 mutex_init(&locks_root->lock); 3690 } 3691 3692 /* dev-replace.c */ 3693 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3694 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3695 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3696 3697 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3698 { 3699 btrfs_bio_counter_sub(fs_info, 1); 3700 } 3701 3702 /* reada.c */ 3703 struct reada_control { 3704 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3705 struct btrfs_key key_start; 3706 struct btrfs_key key_end; /* exclusive */ 3707 atomic_t elems; 3708 struct kref refcnt; 3709 wait_queue_head_t wait; 3710 }; 3711 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3712 struct btrfs_key *start, struct btrfs_key *end); 3713 int btrfs_reada_wait(void *handle); 3714 void btrfs_reada_detach(void *handle); 3715 int btree_readahead_hook(struct extent_buffer *eb, int err); 3716 3717 static inline int is_fstree(u64 rootid) 3718 { 3719 if (rootid == BTRFS_FS_TREE_OBJECTID || 3720 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3721 !btrfs_qgroup_level(rootid))) 3722 return 1; 3723 return 0; 3724 } 3725 3726 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3727 { 3728 return signal_pending(current); 3729 } 3730 3731 /* Sanity test specific functions */ 3732 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3733 void btrfs_test_destroy_inode(struct inode *inode); 3734 #endif 3735 3736 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3737 { 3738 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3739 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3740 &fs_info->fs_state))) 3741 return 1; 3742 #endif 3743 return 0; 3744 } 3745 3746 static inline void cond_wake_up(struct wait_queue_head *wq) 3747 { 3748 /* 3749 * This implies a full smp_mb barrier, see comments for 3750 * waitqueue_active why. 3751 */ 3752 if (wq_has_sleeper(wq)) 3753 wake_up(wq); 3754 } 3755 3756 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3757 { 3758 /* 3759 * Special case for conditional wakeup where the barrier required for 3760 * waitqueue_active is implied by some of the preceding code. Eg. one 3761 * of such atomic operations (atomic_dec_and_return, ...), or a 3762 * unlock/lock sequence, etc. 3763 */ 3764 if (waitqueue_active(wq)) 3765 wake_up(wq); 3766 } 3767 3768 #endif 3769