1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <linux/kobject.h> 20 #include <trace/events/btrfs.h> 21 #include <asm/kmap_types.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 35 struct btrfs_trans_handle; 36 struct btrfs_transaction; 37 struct btrfs_pending_snapshot; 38 extern struct kmem_cache *btrfs_trans_handle_cachep; 39 extern struct kmem_cache *btrfs_bit_radix_cachep; 40 extern struct kmem_cache *btrfs_path_cachep; 41 extern struct kmem_cache *btrfs_free_space_cachep; 42 struct btrfs_ordered_sum; 43 44 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 45 #define STATIC noinline 46 #else 47 #define STATIC static noinline 48 #endif 49 50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 51 52 #define BTRFS_MAX_MIRRORS 3 53 54 #define BTRFS_MAX_LEVEL 8 55 56 #define BTRFS_OLDEST_GENERATION 0ULL 57 58 #define BTRFS_COMPAT_EXTENT_TREE_V0 59 60 /* 61 * the max metadata block size. This limit is somewhat artificial, 62 * but the memmove costs go through the roof for larger blocks. 63 */ 64 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 65 66 /* 67 * we can actually store much bigger names, but lets not confuse the rest 68 * of linux 69 */ 70 #define BTRFS_NAME_LEN 255 71 72 /* 73 * Theoretical limit is larger, but we keep this down to a sane 74 * value. That should limit greatly the possibility of collisions on 75 * inode ref items. 76 */ 77 #define BTRFS_LINK_MAX 65535U 78 79 /* four bytes for CRC32 */ 80 static const int btrfs_csum_sizes[] = { 4 }; 81 82 #define BTRFS_EMPTY_DIR_SIZE 0 83 84 /* ioprio of readahead is set to idle */ 85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 86 87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 88 89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 90 91 92 /* 93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 94 */ 95 static inline u32 count_max_extents(u64 size) 96 { 97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 98 } 99 100 struct btrfs_mapping_tree { 101 struct extent_map_tree map_tree; 102 }; 103 104 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 105 { 106 BUG_ON(num_stripes == 0); 107 return sizeof(struct btrfs_chunk) + 108 sizeof(struct btrfs_stripe) * (num_stripes - 1); 109 } 110 111 /* 112 * File system states 113 */ 114 #define BTRFS_FS_STATE_ERROR 0 115 #define BTRFS_FS_STATE_REMOUNTING 1 116 #define BTRFS_FS_STATE_TRANS_ABORTED 2 117 #define BTRFS_FS_STATE_DEV_REPLACING 3 118 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 119 120 #define BTRFS_BACKREF_REV_MAX 256 121 #define BTRFS_BACKREF_REV_SHIFT 56 122 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 123 BTRFS_BACKREF_REV_SHIFT) 124 125 #define BTRFS_OLD_BACKREF_REV 0 126 #define BTRFS_MIXED_BACKREF_REV 1 127 128 /* 129 * every tree block (leaf or node) starts with this header. 130 */ 131 struct btrfs_header { 132 /* these first four must match the super block */ 133 u8 csum[BTRFS_CSUM_SIZE]; 134 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 135 __le64 bytenr; /* which block this node is supposed to live in */ 136 __le64 flags; 137 138 /* allowed to be different from the super from here on down */ 139 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 140 __le64 generation; 141 __le64 owner; 142 __le32 nritems; 143 u8 level; 144 } __attribute__ ((__packed__)); 145 146 /* 147 * this is a very generous portion of the super block, giving us 148 * room to translate 14 chunks with 3 stripes each. 149 */ 150 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 151 152 /* 153 * just in case we somehow lose the roots and are not able to mount, 154 * we store an array of the roots from previous transactions 155 * in the super. 156 */ 157 #define BTRFS_NUM_BACKUP_ROOTS 4 158 struct btrfs_root_backup { 159 __le64 tree_root; 160 __le64 tree_root_gen; 161 162 __le64 chunk_root; 163 __le64 chunk_root_gen; 164 165 __le64 extent_root; 166 __le64 extent_root_gen; 167 168 __le64 fs_root; 169 __le64 fs_root_gen; 170 171 __le64 dev_root; 172 __le64 dev_root_gen; 173 174 __le64 csum_root; 175 __le64 csum_root_gen; 176 177 __le64 total_bytes; 178 __le64 bytes_used; 179 __le64 num_devices; 180 /* future */ 181 __le64 unused_64[4]; 182 183 u8 tree_root_level; 184 u8 chunk_root_level; 185 u8 extent_root_level; 186 u8 fs_root_level; 187 u8 dev_root_level; 188 u8 csum_root_level; 189 /* future and to align */ 190 u8 unused_8[10]; 191 } __attribute__ ((__packed__)); 192 193 /* 194 * the super block basically lists the main trees of the FS 195 * it currently lacks any block count etc etc 196 */ 197 struct btrfs_super_block { 198 u8 csum[BTRFS_CSUM_SIZE]; 199 /* the first 4 fields must match struct btrfs_header */ 200 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 201 __le64 bytenr; /* this block number */ 202 __le64 flags; 203 204 /* allowed to be different from the btrfs_header from here own down */ 205 __le64 magic; 206 __le64 generation; 207 __le64 root; 208 __le64 chunk_root; 209 __le64 log_root; 210 211 /* this will help find the new super based on the log root */ 212 __le64 log_root_transid; 213 __le64 total_bytes; 214 __le64 bytes_used; 215 __le64 root_dir_objectid; 216 __le64 num_devices; 217 __le32 sectorsize; 218 __le32 nodesize; 219 __le32 __unused_leafsize; 220 __le32 stripesize; 221 __le32 sys_chunk_array_size; 222 __le64 chunk_root_generation; 223 __le64 compat_flags; 224 __le64 compat_ro_flags; 225 __le64 incompat_flags; 226 __le16 csum_type; 227 u8 root_level; 228 u8 chunk_root_level; 229 u8 log_root_level; 230 struct btrfs_dev_item dev_item; 231 232 char label[BTRFS_LABEL_SIZE]; 233 234 __le64 cache_generation; 235 __le64 uuid_tree_generation; 236 237 /* future expansion */ 238 __le64 reserved[30]; 239 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 240 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 241 } __attribute__ ((__packed__)); 242 243 /* 244 * Compat flags that we support. If any incompat flags are set other than the 245 * ones specified below then we will fail to mount 246 */ 247 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 248 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 249 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 250 251 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 252 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 253 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 254 255 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 256 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 257 258 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 259 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 260 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 261 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 262 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 263 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 264 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 265 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 266 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 267 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 268 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 269 270 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 271 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 272 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 273 274 /* 275 * A leaf is full of items. offset and size tell us where to find 276 * the item in the leaf (relative to the start of the data area) 277 */ 278 struct btrfs_item { 279 struct btrfs_disk_key key; 280 __le32 offset; 281 __le32 size; 282 } __attribute__ ((__packed__)); 283 284 /* 285 * leaves have an item area and a data area: 286 * [item0, item1....itemN] [free space] [dataN...data1, data0] 287 * 288 * The data is separate from the items to get the keys closer together 289 * during searches. 290 */ 291 struct btrfs_leaf { 292 struct btrfs_header header; 293 struct btrfs_item items[]; 294 } __attribute__ ((__packed__)); 295 296 /* 297 * all non-leaf blocks are nodes, they hold only keys and pointers to 298 * other blocks 299 */ 300 struct btrfs_key_ptr { 301 struct btrfs_disk_key key; 302 __le64 blockptr; 303 __le64 generation; 304 } __attribute__ ((__packed__)); 305 306 struct btrfs_node { 307 struct btrfs_header header; 308 struct btrfs_key_ptr ptrs[]; 309 } __attribute__ ((__packed__)); 310 311 /* 312 * btrfs_paths remember the path taken from the root down to the leaf. 313 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 314 * to any other levels that are present. 315 * 316 * The slots array records the index of the item or block pointer 317 * used while walking the tree. 318 */ 319 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 320 struct btrfs_path { 321 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 322 int slots[BTRFS_MAX_LEVEL]; 323 /* if there is real range locking, this locks field will change */ 324 u8 locks[BTRFS_MAX_LEVEL]; 325 u8 reada; 326 /* keep some upper locks as we walk down */ 327 u8 lowest_level; 328 329 /* 330 * set by btrfs_split_item, tells search_slot to keep all locks 331 * and to force calls to keep space in the nodes 332 */ 333 unsigned int search_for_split:1; 334 unsigned int keep_locks:1; 335 unsigned int skip_locking:1; 336 unsigned int leave_spinning:1; 337 unsigned int search_commit_root:1; 338 unsigned int need_commit_sem:1; 339 unsigned int skip_release_on_error:1; 340 }; 341 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 342 sizeof(struct btrfs_item)) 343 struct btrfs_dev_replace { 344 u64 replace_state; /* see #define above */ 345 u64 time_started; /* seconds since 1-Jan-1970 */ 346 u64 time_stopped; /* seconds since 1-Jan-1970 */ 347 atomic64_t num_write_errors; 348 atomic64_t num_uncorrectable_read_errors; 349 350 u64 cursor_left; 351 u64 committed_cursor_left; 352 u64 cursor_left_last_write_of_item; 353 u64 cursor_right; 354 355 u64 cont_reading_from_srcdev_mode; /* see #define above */ 356 357 int is_valid; 358 int item_needs_writeback; 359 struct btrfs_device *srcdev; 360 struct btrfs_device *tgtdev; 361 362 pid_t lock_owner; 363 atomic_t nesting_level; 364 struct mutex lock_finishing_cancel_unmount; 365 rwlock_t lock; 366 atomic_t read_locks; 367 atomic_t blocking_readers; 368 wait_queue_head_t read_lock_wq; 369 370 struct btrfs_scrub_progress scrub_progress; 371 }; 372 373 /* For raid type sysfs entries */ 374 struct raid_kobject { 375 u64 flags; 376 struct kobject kobj; 377 struct list_head list; 378 }; 379 380 struct btrfs_space_info { 381 spinlock_t lock; 382 383 u64 total_bytes; /* total bytes in the space, 384 this doesn't take mirrors into account */ 385 u64 bytes_used; /* total bytes used, 386 this doesn't take mirrors into account */ 387 u64 bytes_pinned; /* total bytes pinned, will be freed when the 388 transaction finishes */ 389 u64 bytes_reserved; /* total bytes the allocator has reserved for 390 current allocations */ 391 u64 bytes_may_use; /* number of bytes that may be used for 392 delalloc/allocations */ 393 u64 bytes_readonly; /* total bytes that are read only */ 394 395 u64 max_extent_size; /* This will hold the maximum extent size of 396 the space info if we had an ENOSPC in the 397 allocator. */ 398 399 unsigned int full:1; /* indicates that we cannot allocate any more 400 chunks for this space */ 401 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 402 403 unsigned int flush:1; /* set if we are trying to make space */ 404 405 unsigned int force_alloc; /* set if we need to force a chunk 406 alloc for this space */ 407 408 u64 disk_used; /* total bytes used on disk */ 409 u64 disk_total; /* total bytes on disk, takes mirrors into 410 account */ 411 412 u64 flags; 413 414 /* 415 * bytes_pinned is kept in line with what is actually pinned, as in 416 * we've called update_block_group and dropped the bytes_used counter 417 * and increased the bytes_pinned counter. However this means that 418 * bytes_pinned does not reflect the bytes that will be pinned once the 419 * delayed refs are flushed, so this counter is inc'ed every time we 420 * call btrfs_free_extent so it is a realtime count of what will be 421 * freed once the transaction is committed. It will be zeroed every 422 * time the transaction commits. 423 */ 424 struct percpu_counter total_bytes_pinned; 425 426 struct list_head list; 427 /* Protected by the spinlock 'lock'. */ 428 struct list_head ro_bgs; 429 struct list_head priority_tickets; 430 struct list_head tickets; 431 /* 432 * tickets_id just indicates the next ticket will be handled, so note 433 * it's not stored per ticket. 434 */ 435 u64 tickets_id; 436 437 struct rw_semaphore groups_sem; 438 /* for block groups in our same type */ 439 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 440 wait_queue_head_t wait; 441 442 struct kobject kobj; 443 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 444 }; 445 446 #define BTRFS_BLOCK_RSV_GLOBAL 1 447 #define BTRFS_BLOCK_RSV_DELALLOC 2 448 #define BTRFS_BLOCK_RSV_TRANS 3 449 #define BTRFS_BLOCK_RSV_CHUNK 4 450 #define BTRFS_BLOCK_RSV_DELOPS 5 451 #define BTRFS_BLOCK_RSV_EMPTY 6 452 #define BTRFS_BLOCK_RSV_TEMP 7 453 454 struct btrfs_block_rsv { 455 u64 size; 456 u64 reserved; 457 struct btrfs_space_info *space_info; 458 spinlock_t lock; 459 unsigned short full; 460 unsigned short type; 461 unsigned short failfast; 462 463 /* 464 * Qgroup equivalent for @size @reserved 465 * 466 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 467 * about things like csum size nor how many tree blocks it will need to 468 * reserve. 469 * 470 * Qgroup cares more about net change of the extent usage. 471 * 472 * So for one newly inserted file extent, in worst case it will cause 473 * leaf split and level increase, nodesize for each file extent is 474 * already too much. 475 * 476 * In short, qgroup_size/reserved is the upper limit of possible needed 477 * qgroup metadata reservation. 478 */ 479 u64 qgroup_rsv_size; 480 u64 qgroup_rsv_reserved; 481 }; 482 483 /* 484 * free clusters are used to claim free space in relatively large chunks, 485 * allowing us to do less seeky writes. They are used for all metadata 486 * allocations. In ssd_spread mode they are also used for data allocations. 487 */ 488 struct btrfs_free_cluster { 489 spinlock_t lock; 490 spinlock_t refill_lock; 491 struct rb_root root; 492 493 /* largest extent in this cluster */ 494 u64 max_size; 495 496 /* first extent starting offset */ 497 u64 window_start; 498 499 /* We did a full search and couldn't create a cluster */ 500 bool fragmented; 501 502 struct btrfs_block_group_cache *block_group; 503 /* 504 * when a cluster is allocated from a block group, we put the 505 * cluster onto a list in the block group so that it can 506 * be freed before the block group is freed. 507 */ 508 struct list_head block_group_list; 509 }; 510 511 enum btrfs_caching_type { 512 BTRFS_CACHE_NO = 0, 513 BTRFS_CACHE_STARTED = 1, 514 BTRFS_CACHE_FAST = 2, 515 BTRFS_CACHE_FINISHED = 3, 516 BTRFS_CACHE_ERROR = 4, 517 }; 518 519 enum btrfs_disk_cache_state { 520 BTRFS_DC_WRITTEN = 0, 521 BTRFS_DC_ERROR = 1, 522 BTRFS_DC_CLEAR = 2, 523 BTRFS_DC_SETUP = 3, 524 }; 525 526 struct btrfs_caching_control { 527 struct list_head list; 528 struct mutex mutex; 529 wait_queue_head_t wait; 530 struct btrfs_work work; 531 struct btrfs_block_group_cache *block_group; 532 u64 progress; 533 refcount_t count; 534 }; 535 536 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 537 #define CACHING_CTL_WAKE_UP SZ_2M 538 539 struct btrfs_io_ctl { 540 void *cur, *orig; 541 struct page *page; 542 struct page **pages; 543 struct btrfs_fs_info *fs_info; 544 struct inode *inode; 545 unsigned long size; 546 int index; 547 int num_pages; 548 int entries; 549 int bitmaps; 550 unsigned check_crcs:1; 551 }; 552 553 /* 554 * Tree to record all locked full stripes of a RAID5/6 block group 555 */ 556 struct btrfs_full_stripe_locks_tree { 557 struct rb_root root; 558 struct mutex lock; 559 }; 560 561 struct btrfs_block_group_cache { 562 struct btrfs_key key; 563 struct btrfs_block_group_item item; 564 struct btrfs_fs_info *fs_info; 565 struct inode *inode; 566 spinlock_t lock; 567 u64 pinned; 568 u64 reserved; 569 u64 delalloc_bytes; 570 u64 bytes_super; 571 u64 flags; 572 u64 cache_generation; 573 574 /* 575 * If the free space extent count exceeds this number, convert the block 576 * group to bitmaps. 577 */ 578 u32 bitmap_high_thresh; 579 580 /* 581 * If the free space extent count drops below this number, convert the 582 * block group back to extents. 583 */ 584 u32 bitmap_low_thresh; 585 586 /* 587 * It is just used for the delayed data space allocation because 588 * only the data space allocation and the relative metadata update 589 * can be done cross the transaction. 590 */ 591 struct rw_semaphore data_rwsem; 592 593 /* for raid56, this is a full stripe, without parity */ 594 unsigned long full_stripe_len; 595 596 unsigned int ro; 597 unsigned int iref:1; 598 unsigned int has_caching_ctl:1; 599 unsigned int removed:1; 600 601 int disk_cache_state; 602 603 /* cache tracking stuff */ 604 int cached; 605 struct btrfs_caching_control *caching_ctl; 606 u64 last_byte_to_unpin; 607 608 struct btrfs_space_info *space_info; 609 610 /* free space cache stuff */ 611 struct btrfs_free_space_ctl *free_space_ctl; 612 613 /* block group cache stuff */ 614 struct rb_node cache_node; 615 616 /* for block groups in the same raid type */ 617 struct list_head list; 618 619 /* usage count */ 620 atomic_t count; 621 622 /* List of struct btrfs_free_clusters for this block group. 623 * Today it will only have one thing on it, but that may change 624 */ 625 struct list_head cluster_list; 626 627 /* For delayed block group creation or deletion of empty block groups */ 628 struct list_head bg_list; 629 630 /* For read-only block groups */ 631 struct list_head ro_list; 632 633 atomic_t trimming; 634 635 /* For dirty block groups */ 636 struct list_head dirty_list; 637 struct list_head io_list; 638 639 struct btrfs_io_ctl io_ctl; 640 641 /* 642 * Incremented when doing extent allocations and holding a read lock 643 * on the space_info's groups_sem semaphore. 644 * Decremented when an ordered extent that represents an IO against this 645 * block group's range is created (after it's added to its inode's 646 * root's list of ordered extents) or immediately after the allocation 647 * if it's a metadata extent or fallocate extent (for these cases we 648 * don't create ordered extents). 649 */ 650 atomic_t reservations; 651 652 /* 653 * Incremented while holding the spinlock *lock* by a task checking if 654 * it can perform a nocow write (incremented if the value for the *ro* 655 * field is 0). Decremented by such tasks once they create an ordered 656 * extent or before that if some error happens before reaching that step. 657 * This is to prevent races between block group relocation and nocow 658 * writes through direct IO. 659 */ 660 atomic_t nocow_writers; 661 662 /* Lock for free space tree operations. */ 663 struct mutex free_space_lock; 664 665 /* 666 * Does the block group need to be added to the free space tree? 667 * Protected by free_space_lock. 668 */ 669 int needs_free_space; 670 671 /* Record locked full stripes for RAID5/6 block group */ 672 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 673 }; 674 675 /* delayed seq elem */ 676 struct seq_list { 677 struct list_head list; 678 u64 seq; 679 }; 680 681 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 682 683 #define SEQ_LAST ((u64)-1) 684 685 enum btrfs_orphan_cleanup_state { 686 ORPHAN_CLEANUP_STARTED = 1, 687 ORPHAN_CLEANUP_DONE = 2, 688 }; 689 690 /* used by the raid56 code to lock stripes for read/modify/write */ 691 struct btrfs_stripe_hash { 692 struct list_head hash_list; 693 spinlock_t lock; 694 }; 695 696 /* used by the raid56 code to lock stripes for read/modify/write */ 697 struct btrfs_stripe_hash_table { 698 struct list_head stripe_cache; 699 spinlock_t cache_lock; 700 int cache_size; 701 struct btrfs_stripe_hash table[]; 702 }; 703 704 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 705 706 void btrfs_init_async_reclaim_work(struct work_struct *work); 707 708 /* fs_info */ 709 struct reloc_control; 710 struct btrfs_device; 711 struct btrfs_fs_devices; 712 struct btrfs_balance_control; 713 struct btrfs_delayed_root; 714 715 #define BTRFS_FS_BARRIER 1 716 #define BTRFS_FS_CLOSING_START 2 717 #define BTRFS_FS_CLOSING_DONE 3 718 #define BTRFS_FS_LOG_RECOVERING 4 719 #define BTRFS_FS_OPEN 5 720 #define BTRFS_FS_QUOTA_ENABLED 6 721 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 722 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 723 #define BTRFS_FS_BTREE_ERR 11 724 #define BTRFS_FS_LOG1_ERR 12 725 #define BTRFS_FS_LOG2_ERR 13 726 #define BTRFS_FS_QUOTA_OVERRIDE 14 727 /* Used to record internally whether fs has been frozen */ 728 #define BTRFS_FS_FROZEN 15 729 730 /* 731 * Indicate that a whole-filesystem exclusive operation is running 732 * (device replace, resize, device add/delete, balance) 733 */ 734 #define BTRFS_FS_EXCL_OP 16 735 736 /* 737 * To info transaction_kthread we need an immediate commit so it doesn't 738 * need to wait for commit_interval 739 */ 740 #define BTRFS_FS_NEED_ASYNC_COMMIT 17 741 742 struct btrfs_fs_info { 743 u8 fsid[BTRFS_FSID_SIZE]; 744 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 745 unsigned long flags; 746 struct btrfs_root *extent_root; 747 struct btrfs_root *tree_root; 748 struct btrfs_root *chunk_root; 749 struct btrfs_root *dev_root; 750 struct btrfs_root *fs_root; 751 struct btrfs_root *csum_root; 752 struct btrfs_root *quota_root; 753 struct btrfs_root *uuid_root; 754 struct btrfs_root *free_space_root; 755 756 /* the log root tree is a directory of all the other log roots */ 757 struct btrfs_root *log_root_tree; 758 759 spinlock_t fs_roots_radix_lock; 760 struct radix_tree_root fs_roots_radix; 761 762 /* block group cache stuff */ 763 spinlock_t block_group_cache_lock; 764 u64 first_logical_byte; 765 struct rb_root block_group_cache_tree; 766 767 /* keep track of unallocated space */ 768 atomic64_t free_chunk_space; 769 770 struct extent_io_tree freed_extents[2]; 771 struct extent_io_tree *pinned_extents; 772 773 /* logical->physical extent mapping */ 774 struct btrfs_mapping_tree mapping_tree; 775 776 /* 777 * block reservation for extent, checksum, root tree and 778 * delayed dir index item 779 */ 780 struct btrfs_block_rsv global_block_rsv; 781 /* block reservation for metadata operations */ 782 struct btrfs_block_rsv trans_block_rsv; 783 /* block reservation for chunk tree */ 784 struct btrfs_block_rsv chunk_block_rsv; 785 /* block reservation for delayed operations */ 786 struct btrfs_block_rsv delayed_block_rsv; 787 788 struct btrfs_block_rsv empty_block_rsv; 789 790 u64 generation; 791 u64 last_trans_committed; 792 u64 avg_delayed_ref_runtime; 793 794 /* 795 * this is updated to the current trans every time a full commit 796 * is required instead of the faster short fsync log commits 797 */ 798 u64 last_trans_log_full_commit; 799 unsigned long mount_opt; 800 /* 801 * Track requests for actions that need to be done during transaction 802 * commit (like for some mount options). 803 */ 804 unsigned long pending_changes; 805 unsigned long compress_type:4; 806 unsigned int compress_level; 807 u32 commit_interval; 808 /* 809 * It is a suggestive number, the read side is safe even it gets a 810 * wrong number because we will write out the data into a regular 811 * extent. The write side(mount/remount) is under ->s_umount lock, 812 * so it is also safe. 813 */ 814 u64 max_inline; 815 816 struct btrfs_transaction *running_transaction; 817 wait_queue_head_t transaction_throttle; 818 wait_queue_head_t transaction_wait; 819 wait_queue_head_t transaction_blocked_wait; 820 wait_queue_head_t async_submit_wait; 821 822 /* 823 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 824 * when they are updated. 825 * 826 * Because we do not clear the flags for ever, so we needn't use 827 * the lock on the read side. 828 * 829 * We also needn't use the lock when we mount the fs, because 830 * there is no other task which will update the flag. 831 */ 832 spinlock_t super_lock; 833 struct btrfs_super_block *super_copy; 834 struct btrfs_super_block *super_for_commit; 835 struct super_block *sb; 836 struct inode *btree_inode; 837 struct mutex tree_log_mutex; 838 struct mutex transaction_kthread_mutex; 839 struct mutex cleaner_mutex; 840 struct mutex chunk_mutex; 841 struct mutex volume_mutex; 842 843 /* 844 * this is taken to make sure we don't set block groups ro after 845 * the free space cache has been allocated on them 846 */ 847 struct mutex ro_block_group_mutex; 848 849 /* this is used during read/modify/write to make sure 850 * no two ios are trying to mod the same stripe at the same 851 * time 852 */ 853 struct btrfs_stripe_hash_table *stripe_hash_table; 854 855 /* 856 * this protects the ordered operations list only while we are 857 * processing all of the entries on it. This way we make 858 * sure the commit code doesn't find the list temporarily empty 859 * because another function happens to be doing non-waiting preflush 860 * before jumping into the main commit. 861 */ 862 struct mutex ordered_operations_mutex; 863 864 struct rw_semaphore commit_root_sem; 865 866 struct rw_semaphore cleanup_work_sem; 867 868 struct rw_semaphore subvol_sem; 869 struct srcu_struct subvol_srcu; 870 871 spinlock_t trans_lock; 872 /* 873 * the reloc mutex goes with the trans lock, it is taken 874 * during commit to protect us from the relocation code 875 */ 876 struct mutex reloc_mutex; 877 878 struct list_head trans_list; 879 struct list_head dead_roots; 880 struct list_head caching_block_groups; 881 882 spinlock_t delayed_iput_lock; 883 struct list_head delayed_iputs; 884 struct mutex cleaner_delayed_iput_mutex; 885 886 /* this protects tree_mod_seq_list */ 887 spinlock_t tree_mod_seq_lock; 888 atomic64_t tree_mod_seq; 889 struct list_head tree_mod_seq_list; 890 891 /* this protects tree_mod_log */ 892 rwlock_t tree_mod_log_lock; 893 struct rb_root tree_mod_log; 894 895 atomic_t async_delalloc_pages; 896 897 /* 898 * this is used to protect the following list -- ordered_roots. 899 */ 900 spinlock_t ordered_root_lock; 901 902 /* 903 * all fs/file tree roots in which there are data=ordered extents 904 * pending writeback are added into this list. 905 * 906 * these can span multiple transactions and basically include 907 * every dirty data page that isn't from nodatacow 908 */ 909 struct list_head ordered_roots; 910 911 struct mutex delalloc_root_mutex; 912 spinlock_t delalloc_root_lock; 913 /* all fs/file tree roots that have delalloc inodes. */ 914 struct list_head delalloc_roots; 915 916 /* 917 * there is a pool of worker threads for checksumming during writes 918 * and a pool for checksumming after reads. This is because readers 919 * can run with FS locks held, and the writers may be waiting for 920 * those locks. We don't want ordering in the pending list to cause 921 * deadlocks, and so the two are serviced separately. 922 * 923 * A third pool does submit_bio to avoid deadlocking with the other 924 * two 925 */ 926 struct btrfs_workqueue *workers; 927 struct btrfs_workqueue *delalloc_workers; 928 struct btrfs_workqueue *flush_workers; 929 struct btrfs_workqueue *endio_workers; 930 struct btrfs_workqueue *endio_meta_workers; 931 struct btrfs_workqueue *endio_raid56_workers; 932 struct btrfs_workqueue *endio_repair_workers; 933 struct btrfs_workqueue *rmw_workers; 934 struct btrfs_workqueue *endio_meta_write_workers; 935 struct btrfs_workqueue *endio_write_workers; 936 struct btrfs_workqueue *endio_freespace_worker; 937 struct btrfs_workqueue *submit_workers; 938 struct btrfs_workqueue *caching_workers; 939 struct btrfs_workqueue *readahead_workers; 940 941 /* 942 * fixup workers take dirty pages that didn't properly go through 943 * the cow mechanism and make them safe to write. It happens 944 * for the sys_munmap function call path 945 */ 946 struct btrfs_workqueue *fixup_workers; 947 struct btrfs_workqueue *delayed_workers; 948 949 /* the extent workers do delayed refs on the extent allocation tree */ 950 struct btrfs_workqueue *extent_workers; 951 struct task_struct *transaction_kthread; 952 struct task_struct *cleaner_kthread; 953 u32 thread_pool_size; 954 955 struct kobject *space_info_kobj; 956 struct list_head pending_raid_kobjs; 957 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 958 959 u64 total_pinned; 960 961 /* used to keep from writing metadata until there is a nice batch */ 962 struct percpu_counter dirty_metadata_bytes; 963 struct percpu_counter delalloc_bytes; 964 s32 dirty_metadata_batch; 965 s32 delalloc_batch; 966 967 struct list_head dirty_cowonly_roots; 968 969 struct btrfs_fs_devices *fs_devices; 970 971 /* 972 * The space_info list is effectively read only after initial 973 * setup. It is populated at mount time and cleaned up after 974 * all block groups are removed. RCU is used to protect it. 975 */ 976 struct list_head space_info; 977 978 struct btrfs_space_info *data_sinfo; 979 980 struct reloc_control *reloc_ctl; 981 982 /* data_alloc_cluster is only used in ssd_spread mode */ 983 struct btrfs_free_cluster data_alloc_cluster; 984 985 /* all metadata allocations go through this cluster */ 986 struct btrfs_free_cluster meta_alloc_cluster; 987 988 /* auto defrag inodes go here */ 989 spinlock_t defrag_inodes_lock; 990 struct rb_root defrag_inodes; 991 atomic_t defrag_running; 992 993 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 994 seqlock_t profiles_lock; 995 /* 996 * these three are in extended format (availability of single 997 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 998 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 999 */ 1000 u64 avail_data_alloc_bits; 1001 u64 avail_metadata_alloc_bits; 1002 u64 avail_system_alloc_bits; 1003 1004 /* restriper state */ 1005 spinlock_t balance_lock; 1006 struct mutex balance_mutex; 1007 atomic_t balance_running; 1008 atomic_t balance_pause_req; 1009 atomic_t balance_cancel_req; 1010 struct btrfs_balance_control *balance_ctl; 1011 wait_queue_head_t balance_wait_q; 1012 1013 u32 data_chunk_allocations; 1014 u32 metadata_ratio; 1015 1016 void *bdev_holder; 1017 1018 /* private scrub information */ 1019 struct mutex scrub_lock; 1020 atomic_t scrubs_running; 1021 atomic_t scrub_pause_req; 1022 atomic_t scrubs_paused; 1023 atomic_t scrub_cancel_req; 1024 wait_queue_head_t scrub_pause_wait; 1025 int scrub_workers_refcnt; 1026 struct btrfs_workqueue *scrub_workers; 1027 struct btrfs_workqueue *scrub_wr_completion_workers; 1028 struct btrfs_workqueue *scrub_nocow_workers; 1029 struct btrfs_workqueue *scrub_parity_workers; 1030 1031 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1032 u32 check_integrity_print_mask; 1033 #endif 1034 /* is qgroup tracking in a consistent state? */ 1035 u64 qgroup_flags; 1036 1037 /* holds configuration and tracking. Protected by qgroup_lock */ 1038 struct rb_root qgroup_tree; 1039 struct rb_root qgroup_op_tree; 1040 spinlock_t qgroup_lock; 1041 spinlock_t qgroup_op_lock; 1042 atomic_t qgroup_op_seq; 1043 1044 /* 1045 * used to avoid frequently calling ulist_alloc()/ulist_free() 1046 * when doing qgroup accounting, it must be protected by qgroup_lock. 1047 */ 1048 struct ulist *qgroup_ulist; 1049 1050 /* protect user change for quota operations */ 1051 struct mutex qgroup_ioctl_lock; 1052 1053 /* list of dirty qgroups to be written at next commit */ 1054 struct list_head dirty_qgroups; 1055 1056 /* used by qgroup for an efficient tree traversal */ 1057 u64 qgroup_seq; 1058 1059 /* qgroup rescan items */ 1060 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1061 struct btrfs_key qgroup_rescan_progress; 1062 struct btrfs_workqueue *qgroup_rescan_workers; 1063 struct completion qgroup_rescan_completion; 1064 struct btrfs_work qgroup_rescan_work; 1065 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1066 1067 /* filesystem state */ 1068 unsigned long fs_state; 1069 1070 struct btrfs_delayed_root *delayed_root; 1071 1072 /* readahead tree */ 1073 spinlock_t reada_lock; 1074 struct radix_tree_root reada_tree; 1075 1076 /* readahead works cnt */ 1077 atomic_t reada_works_cnt; 1078 1079 /* Extent buffer radix tree */ 1080 spinlock_t buffer_lock; 1081 struct radix_tree_root buffer_radix; 1082 1083 /* next backup root to be overwritten */ 1084 int backup_root_index; 1085 1086 /* device replace state */ 1087 struct btrfs_dev_replace dev_replace; 1088 1089 struct percpu_counter bio_counter; 1090 wait_queue_head_t replace_wait; 1091 1092 struct semaphore uuid_tree_rescan_sem; 1093 1094 /* Used to reclaim the metadata space in the background. */ 1095 struct work_struct async_reclaim_work; 1096 1097 spinlock_t unused_bgs_lock; 1098 struct list_head unused_bgs; 1099 struct mutex unused_bg_unpin_mutex; 1100 struct mutex delete_unused_bgs_mutex; 1101 1102 /* For btrfs to record security options */ 1103 struct security_mnt_opts security_opts; 1104 1105 /* 1106 * Chunks that can't be freed yet (under a trim/discard operation) 1107 * and will be latter freed. Protected by fs_info->chunk_mutex. 1108 */ 1109 struct list_head pinned_chunks; 1110 1111 /* Cached block sizes */ 1112 u32 nodesize; 1113 u32 sectorsize; 1114 u32 stripesize; 1115 1116 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1117 spinlock_t ref_verify_lock; 1118 struct rb_root block_tree; 1119 #endif 1120 }; 1121 1122 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1123 { 1124 return sb->s_fs_info; 1125 } 1126 1127 struct btrfs_subvolume_writers { 1128 struct percpu_counter counter; 1129 wait_queue_head_t wait; 1130 }; 1131 1132 /* 1133 * The state of btrfs root 1134 */ 1135 /* 1136 * btrfs_record_root_in_trans is a multi-step process, 1137 * and it can race with the balancing code. But the 1138 * race is very small, and only the first time the root 1139 * is added to each transaction. So IN_TRANS_SETUP 1140 * is used to tell us when more checks are required 1141 */ 1142 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1143 #define BTRFS_ROOT_REF_COWS 1 1144 #define BTRFS_ROOT_TRACK_DIRTY 2 1145 #define BTRFS_ROOT_IN_RADIX 3 1146 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1147 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1148 #define BTRFS_ROOT_FORCE_COW 6 1149 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1150 #define BTRFS_ROOT_DIRTY 8 1151 1152 /* 1153 * in ram representation of the tree. extent_root is used for all allocations 1154 * and for the extent tree extent_root root. 1155 */ 1156 struct btrfs_root { 1157 struct extent_buffer *node; 1158 1159 struct extent_buffer *commit_root; 1160 struct btrfs_root *log_root; 1161 struct btrfs_root *reloc_root; 1162 1163 unsigned long state; 1164 struct btrfs_root_item root_item; 1165 struct btrfs_key root_key; 1166 struct btrfs_fs_info *fs_info; 1167 struct extent_io_tree dirty_log_pages; 1168 1169 struct mutex objectid_mutex; 1170 1171 spinlock_t accounting_lock; 1172 struct btrfs_block_rsv *block_rsv; 1173 1174 /* free ino cache stuff */ 1175 struct btrfs_free_space_ctl *free_ino_ctl; 1176 enum btrfs_caching_type ino_cache_state; 1177 spinlock_t ino_cache_lock; 1178 wait_queue_head_t ino_cache_wait; 1179 struct btrfs_free_space_ctl *free_ino_pinned; 1180 u64 ino_cache_progress; 1181 struct inode *ino_cache_inode; 1182 1183 struct mutex log_mutex; 1184 wait_queue_head_t log_writer_wait; 1185 wait_queue_head_t log_commit_wait[2]; 1186 struct list_head log_ctxs[2]; 1187 atomic_t log_writers; 1188 atomic_t log_commit[2]; 1189 atomic_t log_batch; 1190 int log_transid; 1191 /* No matter the commit succeeds or not*/ 1192 int log_transid_committed; 1193 /* Just be updated when the commit succeeds. */ 1194 int last_log_commit; 1195 pid_t log_start_pid; 1196 1197 u64 objectid; 1198 u64 last_trans; 1199 1200 u32 type; 1201 1202 u64 highest_objectid; 1203 1204 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1205 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1206 u64 alloc_bytenr; 1207 #endif 1208 1209 u64 defrag_trans_start; 1210 struct btrfs_key defrag_progress; 1211 struct btrfs_key defrag_max; 1212 char *name; 1213 1214 /* the dirty list is only used by non-reference counted roots */ 1215 struct list_head dirty_list; 1216 1217 struct list_head root_list; 1218 1219 spinlock_t log_extents_lock[2]; 1220 struct list_head logged_list[2]; 1221 1222 spinlock_t orphan_lock; 1223 atomic_t orphan_inodes; 1224 struct btrfs_block_rsv *orphan_block_rsv; 1225 int orphan_cleanup_state; 1226 1227 spinlock_t inode_lock; 1228 /* red-black tree that keeps track of in-memory inodes */ 1229 struct rb_root inode_tree; 1230 1231 /* 1232 * radix tree that keeps track of delayed nodes of every inode, 1233 * protected by inode_lock 1234 */ 1235 struct radix_tree_root delayed_nodes_tree; 1236 /* 1237 * right now this just gets used so that a root has its own devid 1238 * for stat. It may be used for more later 1239 */ 1240 dev_t anon_dev; 1241 1242 spinlock_t root_item_lock; 1243 refcount_t refs; 1244 1245 struct mutex delalloc_mutex; 1246 spinlock_t delalloc_lock; 1247 /* 1248 * all of the inodes that have delalloc bytes. It is possible for 1249 * this list to be empty even when there is still dirty data=ordered 1250 * extents waiting to finish IO. 1251 */ 1252 struct list_head delalloc_inodes; 1253 struct list_head delalloc_root; 1254 u64 nr_delalloc_inodes; 1255 1256 struct mutex ordered_extent_mutex; 1257 /* 1258 * this is used by the balancing code to wait for all the pending 1259 * ordered extents 1260 */ 1261 spinlock_t ordered_extent_lock; 1262 1263 /* 1264 * all of the data=ordered extents pending writeback 1265 * these can span multiple transactions and basically include 1266 * every dirty data page that isn't from nodatacow 1267 */ 1268 struct list_head ordered_extents; 1269 struct list_head ordered_root; 1270 u64 nr_ordered_extents; 1271 1272 /* 1273 * Number of currently running SEND ioctls to prevent 1274 * manipulation with the read-only status via SUBVOL_SETFLAGS 1275 */ 1276 int send_in_progress; 1277 struct btrfs_subvolume_writers *subv_writers; 1278 atomic_t will_be_snapshotted; 1279 1280 /* For qgroup metadata reserved space */ 1281 spinlock_t qgroup_meta_rsv_lock; 1282 u64 qgroup_meta_rsv_pertrans; 1283 u64 qgroup_meta_rsv_prealloc; 1284 }; 1285 1286 struct btrfs_file_private { 1287 void *filldir_buf; 1288 }; 1289 1290 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1291 { 1292 return btrfs_sb(inode->i_sb)->sectorsize; 1293 } 1294 1295 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1296 { 1297 1298 return info->nodesize - sizeof(struct btrfs_header); 1299 } 1300 1301 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1302 1303 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1304 { 1305 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1306 } 1307 1308 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1309 { 1310 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1311 } 1312 1313 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1314 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1315 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1316 { 1317 return BTRFS_MAX_ITEM_SIZE(info) - 1318 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1319 } 1320 1321 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1322 { 1323 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1324 } 1325 1326 /* 1327 * Flags for mount options. 1328 * 1329 * Note: don't forget to add new options to btrfs_show_options() 1330 */ 1331 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1332 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1333 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1334 #define BTRFS_MOUNT_SSD (1 << 3) 1335 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1336 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1337 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1338 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1339 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1340 #define BTRFS_MOUNT_NOSSD (1 << 9) 1341 #define BTRFS_MOUNT_DISCARD (1 << 10) 1342 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1343 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1344 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1345 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1346 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1347 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1348 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1349 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1350 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1351 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1352 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1353 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1354 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1355 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1356 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1357 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1358 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1359 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1360 1361 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1362 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1363 1364 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1365 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1366 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1367 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1368 BTRFS_MOUNT_##opt) 1369 1370 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1371 { \ 1372 if (!btrfs_test_opt(fs_info, opt)) \ 1373 btrfs_info(fs_info, fmt, ##args); \ 1374 btrfs_set_opt(fs_info->mount_opt, opt); \ 1375 } 1376 1377 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1378 { \ 1379 if (btrfs_test_opt(fs_info, opt)) \ 1380 btrfs_info(fs_info, fmt, ##args); \ 1381 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1382 } 1383 1384 #ifdef CONFIG_BTRFS_DEBUG 1385 static inline int 1386 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1387 { 1388 struct btrfs_fs_info *fs_info = block_group->fs_info; 1389 1390 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1391 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1392 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1393 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1394 } 1395 #endif 1396 1397 /* 1398 * Requests for changes that need to be done during transaction commit. 1399 * 1400 * Internal mount options that are used for special handling of the real 1401 * mount options (eg. cannot be set during remount and have to be set during 1402 * transaction commit) 1403 */ 1404 1405 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1406 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1407 #define BTRFS_PENDING_COMMIT (2) 1408 1409 #define btrfs_test_pending(info, opt) \ 1410 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1411 #define btrfs_set_pending(info, opt) \ 1412 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1413 #define btrfs_clear_pending(info, opt) \ 1414 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1415 1416 /* 1417 * Helpers for setting pending mount option changes. 1418 * 1419 * Expects corresponding macros 1420 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1421 */ 1422 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1423 do { \ 1424 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1425 btrfs_info((info), fmt, ##args); \ 1426 btrfs_set_pending((info), SET_##opt); \ 1427 btrfs_clear_pending((info), CLEAR_##opt); \ 1428 } \ 1429 } while(0) 1430 1431 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1432 do { \ 1433 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1434 btrfs_info((info), fmt, ##args); \ 1435 btrfs_set_pending((info), CLEAR_##opt); \ 1436 btrfs_clear_pending((info), SET_##opt); \ 1437 } \ 1438 } while(0) 1439 1440 /* 1441 * Inode flags 1442 */ 1443 #define BTRFS_INODE_NODATASUM (1 << 0) 1444 #define BTRFS_INODE_NODATACOW (1 << 1) 1445 #define BTRFS_INODE_READONLY (1 << 2) 1446 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1447 #define BTRFS_INODE_PREALLOC (1 << 4) 1448 #define BTRFS_INODE_SYNC (1 << 5) 1449 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1450 #define BTRFS_INODE_APPEND (1 << 7) 1451 #define BTRFS_INODE_NODUMP (1 << 8) 1452 #define BTRFS_INODE_NOATIME (1 << 9) 1453 #define BTRFS_INODE_DIRSYNC (1 << 10) 1454 #define BTRFS_INODE_COMPRESS (1 << 11) 1455 1456 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1457 1458 struct btrfs_map_token { 1459 const struct extent_buffer *eb; 1460 char *kaddr; 1461 unsigned long offset; 1462 }; 1463 1464 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1465 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1466 1467 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1468 { 1469 token->kaddr = NULL; 1470 } 1471 1472 /* some macros to generate set/get functions for the struct fields. This 1473 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1474 * one for u8: 1475 */ 1476 #define le8_to_cpu(v) (v) 1477 #define cpu_to_le8(v) (v) 1478 #define __le8 u8 1479 1480 #define read_eb_member(eb, ptr, type, member, result) (\ 1481 read_extent_buffer(eb, (char *)(result), \ 1482 ((unsigned long)(ptr)) + \ 1483 offsetof(type, member), \ 1484 sizeof(((type *)0)->member))) 1485 1486 #define write_eb_member(eb, ptr, type, member, result) (\ 1487 write_extent_buffer(eb, (char *)(result), \ 1488 ((unsigned long)(ptr)) + \ 1489 offsetof(type, member), \ 1490 sizeof(((type *)0)->member))) 1491 1492 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1493 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1494 const void *ptr, unsigned long off, \ 1495 struct btrfs_map_token *token); \ 1496 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1497 unsigned long off, u##bits val, \ 1498 struct btrfs_map_token *token); \ 1499 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1500 const void *ptr, \ 1501 unsigned long off) \ 1502 { \ 1503 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1504 } \ 1505 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1506 unsigned long off, u##bits val) \ 1507 { \ 1508 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1509 } 1510 1511 DECLARE_BTRFS_SETGET_BITS(8) 1512 DECLARE_BTRFS_SETGET_BITS(16) 1513 DECLARE_BTRFS_SETGET_BITS(32) 1514 DECLARE_BTRFS_SETGET_BITS(64) 1515 1516 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1517 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1518 const type *s) \ 1519 { \ 1520 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1521 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1522 } \ 1523 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1524 u##bits val) \ 1525 { \ 1526 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1527 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1528 } \ 1529 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1530 const type *s, \ 1531 struct btrfs_map_token *token) \ 1532 { \ 1533 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1534 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1535 } \ 1536 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1537 type *s, u##bits val, \ 1538 struct btrfs_map_token *token) \ 1539 { \ 1540 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1541 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1542 } 1543 1544 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1545 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1546 { \ 1547 const type *p = page_address(eb->pages[0]); \ 1548 u##bits res = le##bits##_to_cpu(p->member); \ 1549 return res; \ 1550 } \ 1551 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1552 u##bits val) \ 1553 { \ 1554 type *p = page_address(eb->pages[0]); \ 1555 p->member = cpu_to_le##bits(val); \ 1556 } 1557 1558 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1559 static inline u##bits btrfs_##name(const type *s) \ 1560 { \ 1561 return le##bits##_to_cpu(s->member); \ 1562 } \ 1563 static inline void btrfs_set_##name(type *s, u##bits val) \ 1564 { \ 1565 s->member = cpu_to_le##bits(val); \ 1566 } 1567 1568 1569 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1570 struct btrfs_dev_item *s) 1571 { 1572 BUILD_BUG_ON(sizeof(u64) != 1573 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1574 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1575 total_bytes)); 1576 } 1577 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1578 struct btrfs_dev_item *s, 1579 u64 val) 1580 { 1581 BUILD_BUG_ON(sizeof(u64) != 1582 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1583 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1584 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1585 } 1586 1587 1588 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1589 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1590 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1591 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1592 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1593 start_offset, 64); 1594 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1595 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1596 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1597 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1598 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1599 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1600 1601 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1602 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1603 total_bytes, 64); 1604 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1605 bytes_used, 64); 1606 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1607 io_align, 32); 1608 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1609 io_width, 32); 1610 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1611 sector_size, 32); 1612 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1613 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1614 dev_group, 32); 1615 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1616 seek_speed, 8); 1617 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1618 bandwidth, 8); 1619 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1620 generation, 64); 1621 1622 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1623 { 1624 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1625 } 1626 1627 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1628 { 1629 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1630 } 1631 1632 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1633 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1634 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1635 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1636 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1637 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1638 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1639 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1640 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1641 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1642 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1643 1644 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1645 { 1646 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1647 } 1648 1649 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1651 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1652 stripe_len, 64); 1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1654 io_align, 32); 1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1656 io_width, 32); 1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1658 sector_size, 32); 1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1660 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1661 num_stripes, 16); 1662 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1663 sub_stripes, 16); 1664 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1665 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1666 1667 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1668 int nr) 1669 { 1670 unsigned long offset = (unsigned long)c; 1671 offset += offsetof(struct btrfs_chunk, stripe); 1672 offset += nr * sizeof(struct btrfs_stripe); 1673 return (struct btrfs_stripe *)offset; 1674 } 1675 1676 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1677 { 1678 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1679 } 1680 1681 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1682 struct btrfs_chunk *c, int nr) 1683 { 1684 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1685 } 1686 1687 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1688 struct btrfs_chunk *c, int nr) 1689 { 1690 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1691 } 1692 1693 /* struct btrfs_block_group_item */ 1694 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1695 used, 64); 1696 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1697 used, 64); 1698 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1699 struct btrfs_block_group_item, chunk_objectid, 64); 1700 1701 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1702 struct btrfs_block_group_item, chunk_objectid, 64); 1703 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1704 struct btrfs_block_group_item, flags, 64); 1705 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1706 struct btrfs_block_group_item, flags, 64); 1707 1708 /* struct btrfs_free_space_info */ 1709 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1710 extent_count, 32); 1711 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1712 1713 /* struct btrfs_inode_ref */ 1714 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1715 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1716 1717 /* struct btrfs_inode_extref */ 1718 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1719 parent_objectid, 64); 1720 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1721 name_len, 16); 1722 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1723 1724 /* struct btrfs_inode_item */ 1725 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1726 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1727 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1728 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1729 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1730 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1731 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1732 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1733 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1734 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1735 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1736 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1737 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1738 generation, 64); 1739 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1740 sequence, 64); 1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1742 transid, 64); 1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1744 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1745 nbytes, 64); 1746 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1747 block_group, 64); 1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1754 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1755 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1756 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1757 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1758 1759 /* struct btrfs_dev_extent */ 1760 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1761 chunk_tree, 64); 1762 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1763 chunk_objectid, 64); 1764 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1765 chunk_offset, 64); 1766 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1767 1768 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1769 { 1770 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1771 return (unsigned long)dev + ptr; 1772 } 1773 1774 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1775 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1776 generation, 64); 1777 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1778 1779 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1780 1781 1782 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1783 1784 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1785 struct btrfs_tree_block_info *item, 1786 struct btrfs_disk_key *key) 1787 { 1788 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1789 } 1790 1791 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1792 struct btrfs_tree_block_info *item, 1793 struct btrfs_disk_key *key) 1794 { 1795 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1796 } 1797 1798 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1799 root, 64); 1800 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1801 objectid, 64); 1802 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1803 offset, 64); 1804 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1805 count, 32); 1806 1807 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1808 count, 32); 1809 1810 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1811 type, 8); 1812 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1813 offset, 64); 1814 1815 static inline u32 btrfs_extent_inline_ref_size(int type) 1816 { 1817 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1818 type == BTRFS_SHARED_BLOCK_REF_KEY) 1819 return sizeof(struct btrfs_extent_inline_ref); 1820 if (type == BTRFS_SHARED_DATA_REF_KEY) 1821 return sizeof(struct btrfs_shared_data_ref) + 1822 sizeof(struct btrfs_extent_inline_ref); 1823 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1824 return sizeof(struct btrfs_extent_data_ref) + 1825 offsetof(struct btrfs_extent_inline_ref, offset); 1826 return 0; 1827 } 1828 1829 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1830 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1831 generation, 64); 1832 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1833 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1834 1835 /* struct btrfs_node */ 1836 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1837 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1838 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1839 blockptr, 64); 1840 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1841 generation, 64); 1842 1843 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1844 { 1845 unsigned long ptr; 1846 ptr = offsetof(struct btrfs_node, ptrs) + 1847 sizeof(struct btrfs_key_ptr) * nr; 1848 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1849 } 1850 1851 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1852 int nr, u64 val) 1853 { 1854 unsigned long ptr; 1855 ptr = offsetof(struct btrfs_node, ptrs) + 1856 sizeof(struct btrfs_key_ptr) * nr; 1857 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1858 } 1859 1860 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1861 { 1862 unsigned long ptr; 1863 ptr = offsetof(struct btrfs_node, ptrs) + 1864 sizeof(struct btrfs_key_ptr) * nr; 1865 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1866 } 1867 1868 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1869 int nr, u64 val) 1870 { 1871 unsigned long ptr; 1872 ptr = offsetof(struct btrfs_node, ptrs) + 1873 sizeof(struct btrfs_key_ptr) * nr; 1874 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1875 } 1876 1877 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1878 { 1879 return offsetof(struct btrfs_node, ptrs) + 1880 sizeof(struct btrfs_key_ptr) * nr; 1881 } 1882 1883 void btrfs_node_key(const struct extent_buffer *eb, 1884 struct btrfs_disk_key *disk_key, int nr); 1885 1886 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1887 struct btrfs_disk_key *disk_key, int nr) 1888 { 1889 unsigned long ptr; 1890 ptr = btrfs_node_key_ptr_offset(nr); 1891 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1892 struct btrfs_key_ptr, key, disk_key); 1893 } 1894 1895 /* struct btrfs_item */ 1896 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1897 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1898 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1899 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1900 1901 static inline unsigned long btrfs_item_nr_offset(int nr) 1902 { 1903 return offsetof(struct btrfs_leaf, items) + 1904 sizeof(struct btrfs_item) * nr; 1905 } 1906 1907 static inline struct btrfs_item *btrfs_item_nr(int nr) 1908 { 1909 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1910 } 1911 1912 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1913 struct btrfs_item *item) 1914 { 1915 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1916 } 1917 1918 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1919 { 1920 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1921 } 1922 1923 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1924 { 1925 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1926 } 1927 1928 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1929 { 1930 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1931 } 1932 1933 static inline void btrfs_item_key(const struct extent_buffer *eb, 1934 struct btrfs_disk_key *disk_key, int nr) 1935 { 1936 struct btrfs_item *item = btrfs_item_nr(nr); 1937 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1938 } 1939 1940 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1941 struct btrfs_disk_key *disk_key, int nr) 1942 { 1943 struct btrfs_item *item = btrfs_item_nr(nr); 1944 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1945 } 1946 1947 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1948 1949 /* 1950 * struct btrfs_root_ref 1951 */ 1952 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1953 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1954 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1955 1956 /* struct btrfs_dir_item */ 1957 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1958 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1959 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1960 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1961 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1963 data_len, 16); 1964 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1965 name_len, 16); 1966 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1967 transid, 64); 1968 1969 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1970 const struct btrfs_dir_item *item, 1971 struct btrfs_disk_key *key) 1972 { 1973 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1974 } 1975 1976 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1977 struct btrfs_dir_item *item, 1978 const struct btrfs_disk_key *key) 1979 { 1980 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1981 } 1982 1983 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1984 num_entries, 64); 1985 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1986 num_bitmaps, 64); 1987 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1988 generation, 64); 1989 1990 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1991 const struct btrfs_free_space_header *h, 1992 struct btrfs_disk_key *key) 1993 { 1994 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1995 } 1996 1997 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1998 struct btrfs_free_space_header *h, 1999 const struct btrfs_disk_key *key) 2000 { 2001 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2002 } 2003 2004 /* struct btrfs_disk_key */ 2005 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2006 objectid, 64); 2007 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2008 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2009 2010 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2011 const struct btrfs_disk_key *disk) 2012 { 2013 cpu->offset = le64_to_cpu(disk->offset); 2014 cpu->type = disk->type; 2015 cpu->objectid = le64_to_cpu(disk->objectid); 2016 } 2017 2018 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2019 const struct btrfs_key *cpu) 2020 { 2021 disk->offset = cpu_to_le64(cpu->offset); 2022 disk->type = cpu->type; 2023 disk->objectid = cpu_to_le64(cpu->objectid); 2024 } 2025 2026 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2027 struct btrfs_key *key, int nr) 2028 { 2029 struct btrfs_disk_key disk_key; 2030 btrfs_node_key(eb, &disk_key, nr); 2031 btrfs_disk_key_to_cpu(key, &disk_key); 2032 } 2033 2034 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2035 struct btrfs_key *key, int nr) 2036 { 2037 struct btrfs_disk_key disk_key; 2038 btrfs_item_key(eb, &disk_key, nr); 2039 btrfs_disk_key_to_cpu(key, &disk_key); 2040 } 2041 2042 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2043 const struct btrfs_dir_item *item, 2044 struct btrfs_key *key) 2045 { 2046 struct btrfs_disk_key disk_key; 2047 btrfs_dir_item_key(eb, item, &disk_key); 2048 btrfs_disk_key_to_cpu(key, &disk_key); 2049 } 2050 2051 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2052 { 2053 return key->type; 2054 } 2055 2056 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2057 { 2058 key->type = val; 2059 } 2060 2061 /* struct btrfs_header */ 2062 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2063 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2064 generation, 64); 2065 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2066 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2067 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2068 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2069 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2070 generation, 64); 2071 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2072 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2073 nritems, 32); 2074 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2075 2076 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2077 { 2078 return (btrfs_header_flags(eb) & flag) == flag; 2079 } 2080 2081 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2082 { 2083 u64 flags = btrfs_header_flags(eb); 2084 btrfs_set_header_flags(eb, flags | flag); 2085 return (flags & flag) == flag; 2086 } 2087 2088 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2089 { 2090 u64 flags = btrfs_header_flags(eb); 2091 btrfs_set_header_flags(eb, flags & ~flag); 2092 return (flags & flag) == flag; 2093 } 2094 2095 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2096 { 2097 u64 flags = btrfs_header_flags(eb); 2098 return flags >> BTRFS_BACKREF_REV_SHIFT; 2099 } 2100 2101 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2102 int rev) 2103 { 2104 u64 flags = btrfs_header_flags(eb); 2105 flags &= ~BTRFS_BACKREF_REV_MASK; 2106 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2107 btrfs_set_header_flags(eb, flags); 2108 } 2109 2110 static inline unsigned long btrfs_header_fsid(void) 2111 { 2112 return offsetof(struct btrfs_header, fsid); 2113 } 2114 2115 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2116 { 2117 return offsetof(struct btrfs_header, chunk_tree_uuid); 2118 } 2119 2120 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2121 { 2122 return btrfs_header_level(eb) == 0; 2123 } 2124 2125 /* struct btrfs_root_item */ 2126 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2127 generation, 64); 2128 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2129 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2130 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2131 2132 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2133 generation, 64); 2134 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2135 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2136 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2137 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2138 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2139 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2140 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2141 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2142 last_snapshot, 64); 2143 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2144 generation_v2, 64); 2145 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2146 ctransid, 64); 2147 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2148 otransid, 64); 2149 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2150 stransid, 64); 2151 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2152 rtransid, 64); 2153 2154 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2155 { 2156 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2157 } 2158 2159 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2160 { 2161 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2162 } 2163 2164 /* struct btrfs_root_backup */ 2165 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2166 tree_root, 64); 2167 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2168 tree_root_gen, 64); 2169 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2170 tree_root_level, 8); 2171 2172 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2173 chunk_root, 64); 2174 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2175 chunk_root_gen, 64); 2176 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2177 chunk_root_level, 8); 2178 2179 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2180 extent_root, 64); 2181 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2182 extent_root_gen, 64); 2183 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2184 extent_root_level, 8); 2185 2186 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2187 fs_root, 64); 2188 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2189 fs_root_gen, 64); 2190 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2191 fs_root_level, 8); 2192 2193 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2194 dev_root, 64); 2195 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2196 dev_root_gen, 64); 2197 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2198 dev_root_level, 8); 2199 2200 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2201 csum_root, 64); 2202 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2203 csum_root_gen, 64); 2204 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2205 csum_root_level, 8); 2206 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2207 total_bytes, 64); 2208 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2209 bytes_used, 64); 2210 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2211 num_devices, 64); 2212 2213 /* struct btrfs_balance_item */ 2214 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2215 2216 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2217 const struct btrfs_balance_item *bi, 2218 struct btrfs_disk_balance_args *ba) 2219 { 2220 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2221 } 2222 2223 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2224 struct btrfs_balance_item *bi, 2225 const struct btrfs_disk_balance_args *ba) 2226 { 2227 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2228 } 2229 2230 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2231 const struct btrfs_balance_item *bi, 2232 struct btrfs_disk_balance_args *ba) 2233 { 2234 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2235 } 2236 2237 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2238 struct btrfs_balance_item *bi, 2239 const struct btrfs_disk_balance_args *ba) 2240 { 2241 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2242 } 2243 2244 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2245 const struct btrfs_balance_item *bi, 2246 struct btrfs_disk_balance_args *ba) 2247 { 2248 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2249 } 2250 2251 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2252 struct btrfs_balance_item *bi, 2253 const struct btrfs_disk_balance_args *ba) 2254 { 2255 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2256 } 2257 2258 static inline void 2259 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2260 const struct btrfs_disk_balance_args *disk) 2261 { 2262 memset(cpu, 0, sizeof(*cpu)); 2263 2264 cpu->profiles = le64_to_cpu(disk->profiles); 2265 cpu->usage = le64_to_cpu(disk->usage); 2266 cpu->devid = le64_to_cpu(disk->devid); 2267 cpu->pstart = le64_to_cpu(disk->pstart); 2268 cpu->pend = le64_to_cpu(disk->pend); 2269 cpu->vstart = le64_to_cpu(disk->vstart); 2270 cpu->vend = le64_to_cpu(disk->vend); 2271 cpu->target = le64_to_cpu(disk->target); 2272 cpu->flags = le64_to_cpu(disk->flags); 2273 cpu->limit = le64_to_cpu(disk->limit); 2274 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2275 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2276 } 2277 2278 static inline void 2279 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2280 const struct btrfs_balance_args *cpu) 2281 { 2282 memset(disk, 0, sizeof(*disk)); 2283 2284 disk->profiles = cpu_to_le64(cpu->profiles); 2285 disk->usage = cpu_to_le64(cpu->usage); 2286 disk->devid = cpu_to_le64(cpu->devid); 2287 disk->pstart = cpu_to_le64(cpu->pstart); 2288 disk->pend = cpu_to_le64(cpu->pend); 2289 disk->vstart = cpu_to_le64(cpu->vstart); 2290 disk->vend = cpu_to_le64(cpu->vend); 2291 disk->target = cpu_to_le64(cpu->target); 2292 disk->flags = cpu_to_le64(cpu->flags); 2293 disk->limit = cpu_to_le64(cpu->limit); 2294 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2295 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2296 } 2297 2298 /* struct btrfs_super_block */ 2299 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2300 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2301 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2302 generation, 64); 2303 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2305 struct btrfs_super_block, sys_chunk_array_size, 32); 2306 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2307 struct btrfs_super_block, chunk_root_generation, 64); 2308 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2309 root_level, 8); 2310 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2311 chunk_root, 64); 2312 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2313 chunk_root_level, 8); 2314 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2315 log_root, 64); 2316 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2317 log_root_transid, 64); 2318 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2319 log_root_level, 8); 2320 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2321 total_bytes, 64); 2322 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2323 bytes_used, 64); 2324 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2325 sectorsize, 32); 2326 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2327 nodesize, 32); 2328 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2329 stripesize, 32); 2330 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2331 root_dir_objectid, 64); 2332 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2333 num_devices, 64); 2334 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2335 compat_flags, 64); 2336 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2337 compat_ro_flags, 64); 2338 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2339 incompat_flags, 64); 2340 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2341 csum_type, 16); 2342 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2343 cache_generation, 64); 2344 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2345 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2346 uuid_tree_generation, 64); 2347 2348 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2349 { 2350 u16 t = btrfs_super_csum_type(s); 2351 /* 2352 * csum type is validated at mount time 2353 */ 2354 return btrfs_csum_sizes[t]; 2355 } 2356 2357 2358 /* 2359 * The leaf data grows from end-to-front in the node. 2360 * this returns the address of the start of the last item, 2361 * which is the stop of the leaf data stack 2362 */ 2363 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2364 const struct extent_buffer *leaf) 2365 { 2366 u32 nr = btrfs_header_nritems(leaf); 2367 2368 if (nr == 0) 2369 return BTRFS_LEAF_DATA_SIZE(fs_info); 2370 return btrfs_item_offset_nr(leaf, nr - 1); 2371 } 2372 2373 /* struct btrfs_file_extent_item */ 2374 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2375 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2376 struct btrfs_file_extent_item, disk_bytenr, 64); 2377 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2378 struct btrfs_file_extent_item, offset, 64); 2379 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2380 struct btrfs_file_extent_item, generation, 64); 2381 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2382 struct btrfs_file_extent_item, num_bytes, 64); 2383 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2384 struct btrfs_file_extent_item, disk_num_bytes, 64); 2385 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2386 struct btrfs_file_extent_item, compression, 8); 2387 2388 static inline unsigned long 2389 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2390 { 2391 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2392 } 2393 2394 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2395 { 2396 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2397 } 2398 2399 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2400 disk_bytenr, 64); 2401 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2402 generation, 64); 2403 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2404 disk_num_bytes, 64); 2405 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2406 offset, 64); 2407 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2408 num_bytes, 64); 2409 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2410 ram_bytes, 64); 2411 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2412 compression, 8); 2413 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2414 encryption, 8); 2415 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2416 other_encoding, 16); 2417 2418 /* 2419 * this returns the number of bytes used by the item on disk, minus the 2420 * size of any extent headers. If a file is compressed on disk, this is 2421 * the compressed size 2422 */ 2423 static inline u32 btrfs_file_extent_inline_item_len( 2424 const struct extent_buffer *eb, 2425 struct btrfs_item *e) 2426 { 2427 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2428 } 2429 2430 /* this returns the number of file bytes represented by the inline item. 2431 * If an item is compressed, this is the uncompressed size 2432 */ 2433 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb, 2434 int slot, 2435 const struct btrfs_file_extent_item *fi) 2436 { 2437 struct btrfs_map_token token; 2438 2439 btrfs_init_map_token(&token); 2440 /* 2441 * return the space used on disk if this item isn't 2442 * compressed or encoded 2443 */ 2444 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2445 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2446 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2447 return btrfs_file_extent_inline_item_len(eb, 2448 btrfs_item_nr(slot)); 2449 } 2450 2451 /* otherwise use the ram bytes field */ 2452 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2453 } 2454 2455 2456 /* btrfs_dev_stats_item */ 2457 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2458 const struct btrfs_dev_stats_item *ptr, 2459 int index) 2460 { 2461 u64 val; 2462 2463 read_extent_buffer(eb, &val, 2464 offsetof(struct btrfs_dev_stats_item, values) + 2465 ((unsigned long)ptr) + (index * sizeof(u64)), 2466 sizeof(val)); 2467 return val; 2468 } 2469 2470 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2471 struct btrfs_dev_stats_item *ptr, 2472 int index, u64 val) 2473 { 2474 write_extent_buffer(eb, &val, 2475 offsetof(struct btrfs_dev_stats_item, values) + 2476 ((unsigned long)ptr) + (index * sizeof(u64)), 2477 sizeof(val)); 2478 } 2479 2480 /* btrfs_qgroup_status_item */ 2481 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2482 generation, 64); 2483 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2484 version, 64); 2485 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2486 flags, 64); 2487 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2488 rescan, 64); 2489 2490 /* btrfs_qgroup_info_item */ 2491 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2492 generation, 64); 2493 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2494 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2495 rfer_cmpr, 64); 2496 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2497 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2498 excl_cmpr, 64); 2499 2500 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2501 struct btrfs_qgroup_info_item, generation, 64); 2502 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2503 rfer, 64); 2504 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2505 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2506 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2507 excl, 64); 2508 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2509 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2510 2511 /* btrfs_qgroup_limit_item */ 2512 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2513 flags, 64); 2514 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2515 max_rfer, 64); 2516 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2517 max_excl, 64); 2518 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2519 rsv_rfer, 64); 2520 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2521 rsv_excl, 64); 2522 2523 /* btrfs_dev_replace_item */ 2524 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2525 struct btrfs_dev_replace_item, src_devid, 64); 2526 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2527 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2528 64); 2529 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2530 replace_state, 64); 2531 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2532 time_started, 64); 2533 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2534 time_stopped, 64); 2535 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2536 num_write_errors, 64); 2537 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2538 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2539 64); 2540 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2541 cursor_left, 64); 2542 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2543 cursor_right, 64); 2544 2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2546 struct btrfs_dev_replace_item, src_devid, 64); 2547 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2548 struct btrfs_dev_replace_item, 2549 cont_reading_from_srcdev_mode, 64); 2550 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2551 struct btrfs_dev_replace_item, replace_state, 64); 2552 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2553 struct btrfs_dev_replace_item, time_started, 64); 2554 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2555 struct btrfs_dev_replace_item, time_stopped, 64); 2556 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2557 struct btrfs_dev_replace_item, num_write_errors, 64); 2558 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2559 struct btrfs_dev_replace_item, 2560 num_uncorrectable_read_errors, 64); 2561 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2562 struct btrfs_dev_replace_item, cursor_left, 64); 2563 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2564 struct btrfs_dev_replace_item, cursor_right, 64); 2565 2566 /* helper function to cast into the data area of the leaf. */ 2567 #define btrfs_item_ptr(leaf, slot, type) \ 2568 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2569 btrfs_item_offset_nr(leaf, slot))) 2570 2571 #define btrfs_item_ptr_offset(leaf, slot) \ 2572 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2573 btrfs_item_offset_nr(leaf, slot))) 2574 2575 static inline u64 btrfs_name_hash(const char *name, int len) 2576 { 2577 return crc32c((u32)~1, name, len); 2578 } 2579 2580 /* 2581 * Figure the key offset of an extended inode ref 2582 */ 2583 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2584 int len) 2585 { 2586 return (u64) crc32c(parent_objectid, name, len); 2587 } 2588 2589 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2590 { 2591 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2592 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2593 } 2594 2595 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2596 { 2597 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2598 } 2599 2600 /* extent-tree.c */ 2601 2602 enum btrfs_inline_ref_type { 2603 BTRFS_REF_TYPE_INVALID = 0, 2604 BTRFS_REF_TYPE_BLOCK = 1, 2605 BTRFS_REF_TYPE_DATA = 2, 2606 BTRFS_REF_TYPE_ANY = 3, 2607 }; 2608 2609 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2610 struct btrfs_extent_inline_ref *iref, 2611 enum btrfs_inline_ref_type is_data); 2612 2613 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2614 2615 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2616 unsigned num_items) 2617 { 2618 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2619 } 2620 2621 /* 2622 * Doing a truncate won't result in new nodes or leaves, just what we need for 2623 * COW. 2624 */ 2625 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2626 unsigned num_items) 2627 { 2628 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2629 } 2630 2631 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2632 struct btrfs_fs_info *fs_info); 2633 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2634 struct btrfs_fs_info *fs_info); 2635 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2636 const u64 start); 2637 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2638 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2639 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2640 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2641 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2642 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2643 unsigned long count); 2644 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2645 unsigned long count, u64 transid, int wait); 2646 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2647 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2648 struct btrfs_fs_info *fs_info, u64 bytenr, 2649 u64 offset, int metadata, u64 *refs, u64 *flags); 2650 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2651 u64 bytenr, u64 num, int reserved); 2652 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2653 u64 bytenr, u64 num_bytes); 2654 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2655 struct extent_buffer *eb); 2656 int btrfs_cross_ref_exist(struct btrfs_root *root, 2657 u64 objectid, u64 offset, u64 bytenr); 2658 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2659 struct btrfs_fs_info *info, 2660 u64 bytenr); 2661 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2662 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2663 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2664 struct btrfs_root *root, 2665 u64 parent, u64 root_objectid, 2666 const struct btrfs_disk_key *key, 2667 int level, u64 hint, 2668 u64 empty_size); 2669 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2670 struct btrfs_root *root, 2671 struct extent_buffer *buf, 2672 u64 parent, int last_ref); 2673 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2674 struct btrfs_root *root, u64 owner, 2675 u64 offset, u64 ram_bytes, 2676 struct btrfs_key *ins); 2677 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2678 struct btrfs_fs_info *fs_info, 2679 u64 root_objectid, u64 owner, u64 offset, 2680 struct btrfs_key *ins); 2681 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2682 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2683 struct btrfs_key *ins, int is_data, int delalloc); 2684 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2685 struct extent_buffer *buf, int full_backref); 2686 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2687 struct extent_buffer *buf, int full_backref); 2688 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2689 struct btrfs_fs_info *fs_info, 2690 u64 bytenr, u64 num_bytes, u64 flags, 2691 int level, int is_data); 2692 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2693 struct btrfs_root *root, 2694 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2695 u64 owner, u64 offset); 2696 2697 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2698 u64 start, u64 len, int delalloc); 2699 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2700 u64 start, u64 len); 2701 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2702 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2703 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2704 struct btrfs_root *root, 2705 u64 bytenr, u64 num_bytes, u64 parent, 2706 u64 root_objectid, u64 owner, u64 offset); 2707 2708 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2709 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2710 struct btrfs_fs_info *fs_info); 2711 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2712 struct btrfs_fs_info *fs_info); 2713 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2714 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2715 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2716 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2717 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2718 struct btrfs_fs_info *fs_info, u64 bytes_used, 2719 u64 type, u64 chunk_offset, u64 size); 2720 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2721 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2722 struct btrfs_fs_info *fs_info, 2723 const u64 chunk_offset); 2724 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2725 struct btrfs_fs_info *fs_info, u64 group_start, 2726 struct extent_map *em); 2727 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2728 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2729 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2730 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2731 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2732 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2733 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2734 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2735 2736 enum btrfs_reserve_flush_enum { 2737 /* If we are in the transaction, we can't flush anything.*/ 2738 BTRFS_RESERVE_NO_FLUSH, 2739 /* 2740 * Flushing delalloc may cause deadlock somewhere, in this 2741 * case, use FLUSH LIMIT 2742 */ 2743 BTRFS_RESERVE_FLUSH_LIMIT, 2744 BTRFS_RESERVE_FLUSH_ALL, 2745 }; 2746 2747 enum btrfs_flush_state { 2748 FLUSH_DELAYED_ITEMS_NR = 1, 2749 FLUSH_DELAYED_ITEMS = 2, 2750 FLUSH_DELALLOC = 3, 2751 FLUSH_DELALLOC_WAIT = 4, 2752 ALLOC_CHUNK = 5, 2753 COMMIT_TRANS = 6, 2754 }; 2755 2756 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2757 int btrfs_check_data_free_space(struct inode *inode, 2758 struct extent_changeset **reserved, u64 start, u64 len); 2759 void btrfs_free_reserved_data_space(struct inode *inode, 2760 struct extent_changeset *reserved, u64 start, u64 len); 2761 void btrfs_delalloc_release_space(struct inode *inode, 2762 struct extent_changeset *reserved, 2763 u64 start, u64 len, bool qgroup_free); 2764 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2765 u64 len); 2766 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2767 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2768 struct btrfs_inode *inode); 2769 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2770 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2771 struct btrfs_block_rsv *rsv, 2772 int nitems, 2773 u64 *qgroup_reserved, bool use_global_rsv); 2774 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2775 struct btrfs_block_rsv *rsv); 2776 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2777 bool qgroup_free); 2778 2779 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2780 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2781 bool qgroup_free); 2782 int btrfs_delalloc_reserve_space(struct inode *inode, 2783 struct extent_changeset **reserved, u64 start, u64 len); 2784 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2785 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2786 unsigned short type); 2787 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2788 struct btrfs_block_rsv *rsv, 2789 unsigned short type); 2790 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2791 struct btrfs_block_rsv *rsv); 2792 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2793 int btrfs_block_rsv_add(struct btrfs_root *root, 2794 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2795 enum btrfs_reserve_flush_enum flush); 2796 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2797 int btrfs_block_rsv_refill(struct btrfs_root *root, 2798 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2799 enum btrfs_reserve_flush_enum flush); 2800 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2801 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2802 int update_size); 2803 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2804 struct btrfs_block_rsv *dest, u64 num_bytes, 2805 int min_factor); 2806 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2807 struct btrfs_block_rsv *block_rsv, 2808 u64 num_bytes); 2809 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2810 struct btrfs_block_group_cache *cache); 2811 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2812 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2813 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2814 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2815 u64 start, u64 end); 2816 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2817 u64 num_bytes, u64 *actual_bytes); 2818 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2819 struct btrfs_fs_info *fs_info, u64 type); 2820 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2821 2822 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2823 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2824 struct btrfs_fs_info *fs_info); 2825 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2826 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2827 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2828 void check_system_chunk(struct btrfs_trans_handle *trans, 2829 struct btrfs_fs_info *fs_info, const u64 type); 2830 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2831 struct btrfs_fs_info *info, u64 start, u64 end); 2832 2833 /* ctree.c */ 2834 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2835 int level, int *slot); 2836 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2837 int btrfs_previous_item(struct btrfs_root *root, 2838 struct btrfs_path *path, u64 min_objectid, 2839 int type); 2840 int btrfs_previous_extent_item(struct btrfs_root *root, 2841 struct btrfs_path *path, u64 min_objectid); 2842 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2843 struct btrfs_path *path, 2844 const struct btrfs_key *new_key); 2845 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2846 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2847 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2848 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2849 struct btrfs_key *key, int lowest_level, 2850 u64 min_trans); 2851 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2852 struct btrfs_path *path, 2853 u64 min_trans); 2854 enum btrfs_compare_tree_result { 2855 BTRFS_COMPARE_TREE_NEW, 2856 BTRFS_COMPARE_TREE_DELETED, 2857 BTRFS_COMPARE_TREE_CHANGED, 2858 BTRFS_COMPARE_TREE_SAME, 2859 }; 2860 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2861 struct btrfs_path *right_path, 2862 struct btrfs_key *key, 2863 enum btrfs_compare_tree_result result, 2864 void *ctx); 2865 int btrfs_compare_trees(struct btrfs_root *left_root, 2866 struct btrfs_root *right_root, 2867 btrfs_changed_cb_t cb, void *ctx); 2868 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2869 struct btrfs_root *root, struct extent_buffer *buf, 2870 struct extent_buffer *parent, int parent_slot, 2871 struct extent_buffer **cow_ret); 2872 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2873 struct btrfs_root *root, 2874 struct extent_buffer *buf, 2875 struct extent_buffer **cow_ret, u64 new_root_objectid); 2876 int btrfs_block_can_be_shared(struct btrfs_root *root, 2877 struct extent_buffer *buf); 2878 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2879 u32 data_size); 2880 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2881 struct btrfs_path *path, u32 new_size, int from_end); 2882 int btrfs_split_item(struct btrfs_trans_handle *trans, 2883 struct btrfs_root *root, 2884 struct btrfs_path *path, 2885 const struct btrfs_key *new_key, 2886 unsigned long split_offset); 2887 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2888 struct btrfs_root *root, 2889 struct btrfs_path *path, 2890 const struct btrfs_key *new_key); 2891 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2892 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2893 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2894 const struct btrfs_key *key, struct btrfs_path *p, 2895 int ins_len, int cow); 2896 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2897 struct btrfs_path *p, u64 time_seq); 2898 int btrfs_search_slot_for_read(struct btrfs_root *root, 2899 const struct btrfs_key *key, 2900 struct btrfs_path *p, int find_higher, 2901 int return_any); 2902 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2903 struct btrfs_root *root, struct extent_buffer *parent, 2904 int start_slot, u64 *last_ret, 2905 struct btrfs_key *progress); 2906 void btrfs_release_path(struct btrfs_path *p); 2907 struct btrfs_path *btrfs_alloc_path(void); 2908 void btrfs_free_path(struct btrfs_path *p); 2909 void btrfs_set_path_blocking(struct btrfs_path *p); 2910 void btrfs_clear_path_blocking(struct btrfs_path *p, 2911 struct extent_buffer *held, int held_rw); 2912 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2913 2914 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2915 struct btrfs_path *path, int slot, int nr); 2916 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2917 struct btrfs_root *root, 2918 struct btrfs_path *path) 2919 { 2920 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2921 } 2922 2923 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2924 const struct btrfs_key *cpu_key, u32 *data_size, 2925 u32 total_data, u32 total_size, int nr); 2926 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2927 const struct btrfs_key *key, void *data, u32 data_size); 2928 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2929 struct btrfs_root *root, 2930 struct btrfs_path *path, 2931 const struct btrfs_key *cpu_key, u32 *data_size, 2932 int nr); 2933 2934 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2935 struct btrfs_root *root, 2936 struct btrfs_path *path, 2937 const struct btrfs_key *key, 2938 u32 data_size) 2939 { 2940 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2941 } 2942 2943 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2944 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2945 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2946 u64 time_seq); 2947 static inline int btrfs_next_old_item(struct btrfs_root *root, 2948 struct btrfs_path *p, u64 time_seq) 2949 { 2950 ++p->slots[0]; 2951 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2952 return btrfs_next_old_leaf(root, p, time_seq); 2953 return 0; 2954 } 2955 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2956 { 2957 return btrfs_next_old_item(root, p, 0); 2958 } 2959 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2960 struct extent_buffer *leaf); 2961 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2962 struct btrfs_block_rsv *block_rsv, 2963 int update_ref, int for_reloc); 2964 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2965 struct btrfs_root *root, 2966 struct extent_buffer *node, 2967 struct extent_buffer *parent); 2968 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2969 { 2970 /* 2971 * Do it this way so we only ever do one test_bit in the normal case. 2972 */ 2973 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2974 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2975 return 2; 2976 return 1; 2977 } 2978 return 0; 2979 } 2980 2981 /* 2982 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2983 * anything except sleeping. This function is used to check the status of 2984 * the fs. 2985 */ 2986 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2987 { 2988 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2989 } 2990 2991 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2992 { 2993 kfree(fs_info->balance_ctl); 2994 kfree(fs_info->delayed_root); 2995 kfree(fs_info->extent_root); 2996 kfree(fs_info->tree_root); 2997 kfree(fs_info->chunk_root); 2998 kfree(fs_info->dev_root); 2999 kfree(fs_info->csum_root); 3000 kfree(fs_info->quota_root); 3001 kfree(fs_info->uuid_root); 3002 kfree(fs_info->free_space_root); 3003 kfree(fs_info->super_copy); 3004 kfree(fs_info->super_for_commit); 3005 security_free_mnt_opts(&fs_info->security_opts); 3006 kvfree(fs_info); 3007 } 3008 3009 /* tree mod log functions from ctree.c */ 3010 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 3011 struct seq_list *elem); 3012 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 3013 struct seq_list *elem); 3014 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 3015 3016 /* root-item.c */ 3017 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 3018 struct btrfs_fs_info *fs_info, 3019 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 3020 const char *name, int name_len); 3021 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 3022 struct btrfs_fs_info *fs_info, 3023 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 3024 const char *name, int name_len); 3025 int btrfs_del_root(struct btrfs_trans_handle *trans, 3026 struct btrfs_fs_info *fs_info, const struct btrfs_key *key); 3027 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 3028 const struct btrfs_key *key, 3029 struct btrfs_root_item *item); 3030 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3031 struct btrfs_root *root, 3032 struct btrfs_key *key, 3033 struct btrfs_root_item *item); 3034 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3035 struct btrfs_path *path, struct btrfs_root_item *root_item, 3036 struct btrfs_key *root_key); 3037 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3038 void btrfs_set_root_node(struct btrfs_root_item *item, 3039 struct extent_buffer *node); 3040 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3041 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3042 struct btrfs_root *root); 3043 3044 /* uuid-tree.c */ 3045 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 3046 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3047 u64 subid); 3048 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 3049 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3050 u64 subid); 3051 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3052 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3053 u64)); 3054 3055 /* dir-item.c */ 3056 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3057 const char *name, int name_len); 3058 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3059 struct btrfs_root *root, const char *name, 3060 int name_len, struct btrfs_inode *dir, 3061 struct btrfs_key *location, u8 type, u64 index); 3062 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3063 struct btrfs_root *root, 3064 struct btrfs_path *path, u64 dir, 3065 const char *name, int name_len, 3066 int mod); 3067 struct btrfs_dir_item * 3068 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3069 struct btrfs_root *root, 3070 struct btrfs_path *path, u64 dir, 3071 u64 objectid, const char *name, int name_len, 3072 int mod); 3073 struct btrfs_dir_item * 3074 btrfs_search_dir_index_item(struct btrfs_root *root, 3075 struct btrfs_path *path, u64 dirid, 3076 const char *name, int name_len); 3077 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3078 struct btrfs_root *root, 3079 struct btrfs_path *path, 3080 struct btrfs_dir_item *di); 3081 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3082 struct btrfs_root *root, 3083 struct btrfs_path *path, u64 objectid, 3084 const char *name, u16 name_len, 3085 const void *data, u16 data_len); 3086 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3087 struct btrfs_root *root, 3088 struct btrfs_path *path, u64 dir, 3089 const char *name, u16 name_len, 3090 int mod); 3091 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3092 struct btrfs_path *path, 3093 const char *name, 3094 int name_len); 3095 3096 /* orphan.c */ 3097 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3098 struct btrfs_root *root, u64 offset); 3099 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3100 struct btrfs_root *root, u64 offset); 3101 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3102 3103 /* inode-item.c */ 3104 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3105 struct btrfs_root *root, 3106 const char *name, int name_len, 3107 u64 inode_objectid, u64 ref_objectid, u64 index); 3108 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3109 struct btrfs_root *root, 3110 const char *name, int name_len, 3111 u64 inode_objectid, u64 ref_objectid, u64 *index); 3112 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3113 struct btrfs_root *root, 3114 struct btrfs_path *path, u64 objectid); 3115 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3116 *root, struct btrfs_path *path, 3117 struct btrfs_key *location, int mod); 3118 3119 struct btrfs_inode_extref * 3120 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3121 struct btrfs_root *root, 3122 struct btrfs_path *path, 3123 const char *name, int name_len, 3124 u64 inode_objectid, u64 ref_objectid, int ins_len, 3125 int cow); 3126 3127 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3128 const char *name, 3129 int name_len, struct btrfs_inode_ref **ref_ret); 3130 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3131 u64 ref_objectid, const char *name, 3132 int name_len, 3133 struct btrfs_inode_extref **extref_ret); 3134 3135 /* file-item.c */ 3136 struct btrfs_dio_private; 3137 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3138 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3139 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3140 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3141 u64 logical_offset); 3142 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3143 struct btrfs_root *root, 3144 u64 objectid, u64 pos, 3145 u64 disk_offset, u64 disk_num_bytes, 3146 u64 num_bytes, u64 offset, u64 ram_bytes, 3147 u8 compression, u8 encryption, u16 other_encoding); 3148 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3149 struct btrfs_root *root, 3150 struct btrfs_path *path, u64 objectid, 3151 u64 bytenr, int mod); 3152 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3153 struct btrfs_root *root, 3154 struct btrfs_ordered_sum *sums); 3155 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3156 u64 file_start, int contig); 3157 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3158 struct list_head *list, int search_commit); 3159 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3160 const struct btrfs_path *path, 3161 struct btrfs_file_extent_item *fi, 3162 const bool new_inline, 3163 struct extent_map *em); 3164 3165 /* inode.c */ 3166 struct btrfs_delalloc_work { 3167 struct inode *inode; 3168 int delay_iput; 3169 struct completion completion; 3170 struct list_head list; 3171 struct btrfs_work work; 3172 }; 3173 3174 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3175 int delay_iput); 3176 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3177 3178 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3179 struct page *page, size_t pg_offset, u64 start, 3180 u64 len, int create); 3181 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3182 u64 *orig_start, u64 *orig_block_len, 3183 u64 *ram_bytes); 3184 3185 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3186 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3187 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3188 struct btrfs_root *root, 3189 struct btrfs_inode *dir, struct btrfs_inode *inode, 3190 const char *name, int name_len); 3191 int btrfs_add_link(struct btrfs_trans_handle *trans, 3192 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3193 const char *name, int name_len, int add_backref, u64 index); 3194 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3195 struct btrfs_root *root, 3196 struct inode *dir, u64 objectid, 3197 const char *name, int name_len); 3198 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3199 int front); 3200 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3201 struct btrfs_root *root, 3202 struct inode *inode, u64 new_size, 3203 u32 min_type); 3204 3205 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3206 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3207 int nr); 3208 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3209 unsigned int extra_bits, 3210 struct extent_state **cached_state, int dedupe); 3211 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3212 struct btrfs_root *new_root, 3213 struct btrfs_root *parent_root, 3214 u64 new_dirid); 3215 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3216 size_t size, struct bio *bio, 3217 unsigned long bio_flags); 3218 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3219 int btrfs_page_mkwrite(struct vm_fault *vmf); 3220 int btrfs_readpage(struct file *file, struct page *page); 3221 void btrfs_evict_inode(struct inode *inode); 3222 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3223 struct inode *btrfs_alloc_inode(struct super_block *sb); 3224 void btrfs_destroy_inode(struct inode *inode); 3225 int btrfs_drop_inode(struct inode *inode); 3226 int __init btrfs_init_cachep(void); 3227 void __cold btrfs_destroy_cachep(void); 3228 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3229 struct btrfs_root *root, int *was_new); 3230 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3231 struct page *page, size_t pg_offset, 3232 u64 start, u64 end, int create); 3233 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3234 struct btrfs_root *root, 3235 struct inode *inode); 3236 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3237 struct btrfs_root *root, struct inode *inode); 3238 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3239 struct btrfs_inode *inode); 3240 int btrfs_orphan_cleanup(struct btrfs_root *root); 3241 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3242 struct btrfs_root *root); 3243 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3244 void btrfs_invalidate_inodes(struct btrfs_root *root); 3245 void btrfs_add_delayed_iput(struct inode *inode); 3246 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3247 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3248 u64 start, u64 num_bytes, u64 min_size, 3249 loff_t actual_len, u64 *alloc_hint); 3250 int btrfs_prealloc_file_range_trans(struct inode *inode, 3251 struct btrfs_trans_handle *trans, int mode, 3252 u64 start, u64 num_bytes, u64 min_size, 3253 loff_t actual_len, u64 *alloc_hint); 3254 extern const struct dentry_operations btrfs_dentry_operations; 3255 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3256 void btrfs_test_inode_set_ops(struct inode *inode); 3257 #endif 3258 3259 /* ioctl.c */ 3260 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3261 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3262 int btrfs_ioctl_get_supported_features(void __user *arg); 3263 void btrfs_update_iflags(struct inode *inode); 3264 int btrfs_is_empty_uuid(u8 *uuid); 3265 int btrfs_defrag_file(struct inode *inode, struct file *file, 3266 struct btrfs_ioctl_defrag_range_args *range, 3267 u64 newer_than, unsigned long max_pages); 3268 void btrfs_get_block_group_info(struct list_head *groups_list, 3269 struct btrfs_ioctl_space_info *space); 3270 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3271 struct btrfs_ioctl_balance_args *bargs); 3272 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3273 struct file *dst_file, u64 dst_loff); 3274 3275 /* file.c */ 3276 int __init btrfs_auto_defrag_init(void); 3277 void __cold btrfs_auto_defrag_exit(void); 3278 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3279 struct btrfs_inode *inode); 3280 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3281 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3282 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3283 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3284 int skip_pinned); 3285 extern const struct file_operations btrfs_file_operations; 3286 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3287 struct btrfs_root *root, struct inode *inode, 3288 struct btrfs_path *path, u64 start, u64 end, 3289 u64 *drop_end, int drop_cache, 3290 int replace_extent, 3291 u32 extent_item_size, 3292 int *key_inserted); 3293 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3294 struct btrfs_root *root, struct inode *inode, u64 start, 3295 u64 end, int drop_cache); 3296 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3297 struct btrfs_inode *inode, u64 start, u64 end); 3298 int btrfs_release_file(struct inode *inode, struct file *file); 3299 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3300 size_t num_pages, loff_t pos, size_t write_bytes, 3301 struct extent_state **cached); 3302 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3303 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3304 struct file *file_out, loff_t pos_out, u64 len); 3305 3306 /* tree-defrag.c */ 3307 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3308 struct btrfs_root *root); 3309 3310 /* sysfs.c */ 3311 int __init btrfs_init_sysfs(void); 3312 void __cold btrfs_exit_sysfs(void); 3313 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3314 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3315 3316 /* super.c */ 3317 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3318 unsigned long new_flags); 3319 int btrfs_sync_fs(struct super_block *sb, int wait); 3320 3321 static inline __printf(2, 3) __cold 3322 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3323 { 3324 } 3325 3326 #ifdef CONFIG_PRINTK 3327 __printf(2, 3) 3328 __cold 3329 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3330 #else 3331 #define btrfs_printk(fs_info, fmt, args...) \ 3332 btrfs_no_printk(fs_info, fmt, ##args) 3333 #endif 3334 3335 #define btrfs_emerg(fs_info, fmt, args...) \ 3336 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3337 #define btrfs_alert(fs_info, fmt, args...) \ 3338 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3339 #define btrfs_crit(fs_info, fmt, args...) \ 3340 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3341 #define btrfs_err(fs_info, fmt, args...) \ 3342 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3343 #define btrfs_warn(fs_info, fmt, args...) \ 3344 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3345 #define btrfs_notice(fs_info, fmt, args...) \ 3346 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3347 #define btrfs_info(fs_info, fmt, args...) \ 3348 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3349 3350 /* 3351 * Wrappers that use printk_in_rcu 3352 */ 3353 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3354 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3355 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3356 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3357 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3358 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3359 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3360 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3361 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3362 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3363 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3364 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3365 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3366 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3367 3368 /* 3369 * Wrappers that use a ratelimited printk_in_rcu 3370 */ 3371 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3372 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3373 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3374 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3375 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3376 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3377 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3378 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3379 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3380 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3381 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3382 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3383 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3384 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3385 3386 /* 3387 * Wrappers that use a ratelimited printk 3388 */ 3389 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3390 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3391 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3392 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3393 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3394 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3395 #define btrfs_err_rl(fs_info, fmt, args...) \ 3396 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3397 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3398 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3399 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3400 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3401 #define btrfs_info_rl(fs_info, fmt, args...) \ 3402 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3403 3404 #if defined(CONFIG_DYNAMIC_DEBUG) 3405 #define btrfs_debug(fs_info, fmt, args...) \ 3406 do { \ 3407 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3408 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3409 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3410 } while (0) 3411 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3412 do { \ 3413 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3414 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3415 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3416 } while (0) 3417 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3418 do { \ 3419 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3420 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3421 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3422 ##args);\ 3423 } while (0) 3424 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3425 do { \ 3426 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3427 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3428 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3429 ##args); \ 3430 } while (0) 3431 #elif defined(DEBUG) 3432 #define btrfs_debug(fs_info, fmt, args...) \ 3433 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3434 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3435 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3436 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3437 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3438 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3439 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3440 #else 3441 #define btrfs_debug(fs_info, fmt, args...) \ 3442 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3443 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3444 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3445 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3446 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3447 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3448 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3449 #endif 3450 3451 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3452 do { \ 3453 rcu_read_lock(); \ 3454 btrfs_printk(fs_info, fmt, ##args); \ 3455 rcu_read_unlock(); \ 3456 } while (0) 3457 3458 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3459 do { \ 3460 static DEFINE_RATELIMIT_STATE(_rs, \ 3461 DEFAULT_RATELIMIT_INTERVAL, \ 3462 DEFAULT_RATELIMIT_BURST); \ 3463 if (__ratelimit(&_rs)) \ 3464 btrfs_printk(fs_info, fmt, ##args); \ 3465 } while (0) 3466 3467 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3468 do { \ 3469 rcu_read_lock(); \ 3470 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3471 rcu_read_unlock(); \ 3472 } while (0) 3473 3474 #ifdef CONFIG_BTRFS_ASSERT 3475 3476 __cold 3477 static inline void assfail(char *expr, char *file, int line) 3478 { 3479 pr_err("assertion failed: %s, file: %s, line: %d\n", 3480 expr, file, line); 3481 BUG(); 3482 } 3483 3484 #define ASSERT(expr) \ 3485 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3486 #else 3487 #define ASSERT(expr) ((void)0) 3488 #endif 3489 3490 __printf(5, 6) 3491 __cold 3492 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3493 unsigned int line, int errno, const char *fmt, ...); 3494 3495 const char *btrfs_decode_error(int errno); 3496 3497 __cold 3498 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3499 const char *function, 3500 unsigned int line, int errno); 3501 3502 /* 3503 * Call btrfs_abort_transaction as early as possible when an error condition is 3504 * detected, that way the exact line number is reported. 3505 */ 3506 #define btrfs_abort_transaction(trans, errno) \ 3507 do { \ 3508 /* Report first abort since mount */ \ 3509 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3510 &((trans)->fs_info->fs_state))) { \ 3511 if ((errno) != -EIO) { \ 3512 WARN(1, KERN_DEBUG \ 3513 "BTRFS: Transaction aborted (error %d)\n", \ 3514 (errno)); \ 3515 } else { \ 3516 btrfs_debug((trans)->fs_info, \ 3517 "Transaction aborted (error %d)", \ 3518 (errno)); \ 3519 } \ 3520 } \ 3521 __btrfs_abort_transaction((trans), __func__, \ 3522 __LINE__, (errno)); \ 3523 } while (0) 3524 3525 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3526 do { \ 3527 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3528 (errno), fmt, ##args); \ 3529 } while (0) 3530 3531 __printf(5, 6) 3532 __cold 3533 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3534 unsigned int line, int errno, const char *fmt, ...); 3535 /* 3536 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3537 * will panic(). Otherwise we BUG() here. 3538 */ 3539 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3540 do { \ 3541 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3542 BUG(); \ 3543 } while (0) 3544 3545 3546 /* compatibility and incompatibility defines */ 3547 3548 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3549 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3550 3551 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3552 u64 flag) 3553 { 3554 struct btrfs_super_block *disk_super; 3555 u64 features; 3556 3557 disk_super = fs_info->super_copy; 3558 features = btrfs_super_incompat_flags(disk_super); 3559 if (!(features & flag)) { 3560 spin_lock(&fs_info->super_lock); 3561 features = btrfs_super_incompat_flags(disk_super); 3562 if (!(features & flag)) { 3563 features |= flag; 3564 btrfs_set_super_incompat_flags(disk_super, features); 3565 btrfs_info(fs_info, "setting %llu feature flag", 3566 flag); 3567 } 3568 spin_unlock(&fs_info->super_lock); 3569 } 3570 } 3571 3572 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3573 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3574 3575 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3576 u64 flag) 3577 { 3578 struct btrfs_super_block *disk_super; 3579 u64 features; 3580 3581 disk_super = fs_info->super_copy; 3582 features = btrfs_super_incompat_flags(disk_super); 3583 if (features & flag) { 3584 spin_lock(&fs_info->super_lock); 3585 features = btrfs_super_incompat_flags(disk_super); 3586 if (features & flag) { 3587 features &= ~flag; 3588 btrfs_set_super_incompat_flags(disk_super, features); 3589 btrfs_info(fs_info, "clearing %llu feature flag", 3590 flag); 3591 } 3592 spin_unlock(&fs_info->super_lock); 3593 } 3594 } 3595 3596 #define btrfs_fs_incompat(fs_info, opt) \ 3597 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3598 3599 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3600 { 3601 struct btrfs_super_block *disk_super; 3602 disk_super = fs_info->super_copy; 3603 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3604 } 3605 3606 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3607 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3608 3609 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3610 u64 flag) 3611 { 3612 struct btrfs_super_block *disk_super; 3613 u64 features; 3614 3615 disk_super = fs_info->super_copy; 3616 features = btrfs_super_compat_ro_flags(disk_super); 3617 if (!(features & flag)) { 3618 spin_lock(&fs_info->super_lock); 3619 features = btrfs_super_compat_ro_flags(disk_super); 3620 if (!(features & flag)) { 3621 features |= flag; 3622 btrfs_set_super_compat_ro_flags(disk_super, features); 3623 btrfs_info(fs_info, "setting %llu ro feature flag", 3624 flag); 3625 } 3626 spin_unlock(&fs_info->super_lock); 3627 } 3628 } 3629 3630 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3631 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3632 3633 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3634 u64 flag) 3635 { 3636 struct btrfs_super_block *disk_super; 3637 u64 features; 3638 3639 disk_super = fs_info->super_copy; 3640 features = btrfs_super_compat_ro_flags(disk_super); 3641 if (features & flag) { 3642 spin_lock(&fs_info->super_lock); 3643 features = btrfs_super_compat_ro_flags(disk_super); 3644 if (features & flag) { 3645 features &= ~flag; 3646 btrfs_set_super_compat_ro_flags(disk_super, features); 3647 btrfs_info(fs_info, "clearing %llu ro feature flag", 3648 flag); 3649 } 3650 spin_unlock(&fs_info->super_lock); 3651 } 3652 } 3653 3654 #define btrfs_fs_compat_ro(fs_info, opt) \ 3655 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3656 3657 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3658 { 3659 struct btrfs_super_block *disk_super; 3660 disk_super = fs_info->super_copy; 3661 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3662 } 3663 3664 /* acl.c */ 3665 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3666 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3667 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3668 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3669 struct inode *inode, struct inode *dir); 3670 #else 3671 #define btrfs_get_acl NULL 3672 #define btrfs_set_acl NULL 3673 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3674 struct inode *inode, struct inode *dir) 3675 { 3676 return 0; 3677 } 3678 #endif 3679 3680 /* relocation.c */ 3681 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3682 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3683 struct btrfs_root *root); 3684 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3685 struct btrfs_root *root); 3686 int btrfs_recover_relocation(struct btrfs_root *root); 3687 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3688 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3689 struct btrfs_root *root, struct extent_buffer *buf, 3690 struct extent_buffer *cow); 3691 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3692 u64 *bytes_to_reserve); 3693 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3694 struct btrfs_pending_snapshot *pending); 3695 3696 /* scrub.c */ 3697 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3698 u64 end, struct btrfs_scrub_progress *progress, 3699 int readonly, int is_dev_replace); 3700 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3701 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3702 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3703 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3704 struct btrfs_device *dev); 3705 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3706 struct btrfs_scrub_progress *progress); 3707 static inline void btrfs_init_full_stripe_locks_tree( 3708 struct btrfs_full_stripe_locks_tree *locks_root) 3709 { 3710 locks_root->root = RB_ROOT; 3711 mutex_init(&locks_root->lock); 3712 } 3713 3714 /* dev-replace.c */ 3715 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3716 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3717 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3718 3719 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3720 { 3721 btrfs_bio_counter_sub(fs_info, 1); 3722 } 3723 3724 /* reada.c */ 3725 struct reada_control { 3726 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3727 struct btrfs_key key_start; 3728 struct btrfs_key key_end; /* exclusive */ 3729 atomic_t elems; 3730 struct kref refcnt; 3731 wait_queue_head_t wait; 3732 }; 3733 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3734 struct btrfs_key *start, struct btrfs_key *end); 3735 int btrfs_reada_wait(void *handle); 3736 void btrfs_reada_detach(void *handle); 3737 int btree_readahead_hook(struct extent_buffer *eb, int err); 3738 3739 static inline int is_fstree(u64 rootid) 3740 { 3741 if (rootid == BTRFS_FS_TREE_OBJECTID || 3742 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3743 !btrfs_qgroup_level(rootid))) 3744 return 1; 3745 return 0; 3746 } 3747 3748 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3749 { 3750 return signal_pending(current); 3751 } 3752 3753 /* Sanity test specific functions */ 3754 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3755 void btrfs_test_destroy_inode(struct inode *inode); 3756 #endif 3757 3758 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3759 { 3760 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3761 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3762 &fs_info->fs_state))) 3763 return 1; 3764 #endif 3765 return 0; 3766 } 3767 3768 #endif 3769