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