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 <asm/unaligned.h> 23 #include <linux/pagemap.h> 24 #include <linux/btrfs.h> 25 #include <linux/btrfs_tree.h> 26 #include <linux/workqueue.h> 27 #include <linux/security.h> 28 #include <linux/sizes.h> 29 #include <linux/dynamic_debug.h> 30 #include <linux/refcount.h> 31 #include <linux/crc32c.h> 32 #include "extent_io.h" 33 #include "extent_map.h" 34 #include "async-thread.h" 35 #include "block-rsv.h" 36 37 struct btrfs_trans_handle; 38 struct btrfs_transaction; 39 struct btrfs_pending_snapshot; 40 struct btrfs_delayed_ref_root; 41 struct btrfs_space_info; 42 extern struct kmem_cache *btrfs_trans_handle_cachep; 43 extern struct kmem_cache *btrfs_bit_radix_cachep; 44 extern struct kmem_cache *btrfs_path_cachep; 45 extern struct kmem_cache *btrfs_free_space_cachep; 46 struct btrfs_ordered_sum; 47 struct btrfs_ref; 48 49 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 50 51 /* 52 * Maximum number of mirrors that can be available for all profiles counting 53 * the target device of dev-replace as one. During an active device replace 54 * procedure, the target device of the copy operation is a mirror for the 55 * filesystem data as well that can be used to read data in order to repair 56 * read errors on other disks. 57 * 58 * Current value is derived from RAID1 with 2 copies. 59 */ 60 #define BTRFS_MAX_MIRRORS (2 + 1) 61 62 #define BTRFS_MAX_LEVEL 8 63 64 #define BTRFS_OLDEST_GENERATION 0ULL 65 66 /* 67 * the max metadata block size. This limit is somewhat artificial, 68 * but the memmove costs go through the roof for larger blocks. 69 */ 70 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 71 72 /* 73 * we can actually store much bigger names, but lets not confuse the rest 74 * of linux 75 */ 76 #define BTRFS_NAME_LEN 255 77 78 /* 79 * Theoretical limit is larger, but we keep this down to a sane 80 * value. That should limit greatly the possibility of collisions on 81 * inode ref items. 82 */ 83 #define BTRFS_LINK_MAX 65535U 84 85 /* four bytes for CRC32 */ 86 static const int btrfs_csum_sizes[] = { 4 }; 87 static const char *btrfs_csum_names[] = { "crc32c" }; 88 89 #define BTRFS_EMPTY_DIR_SIZE 0 90 91 /* ioprio of readahead is set to idle */ 92 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 93 94 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 95 96 /* 97 * Use large batch size to reduce overhead of metadata updates. On the reader 98 * side, we only read it when we are close to ENOSPC and the read overhead is 99 * mostly related to the number of CPUs, so it is OK to use arbitrary large 100 * value here. 101 */ 102 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 103 104 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 105 106 107 /* 108 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 109 */ 110 static inline u32 count_max_extents(u64 size) 111 { 112 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 113 } 114 115 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 116 { 117 BUG_ON(num_stripes == 0); 118 return sizeof(struct btrfs_chunk) + 119 sizeof(struct btrfs_stripe) * (num_stripes - 1); 120 } 121 122 /* 123 * Runtime (in-memory) states of filesystem 124 */ 125 enum { 126 /* Global indicator of serious filesystem errors */ 127 BTRFS_FS_STATE_ERROR, 128 /* 129 * Filesystem is being remounted, allow to skip some operations, like 130 * defrag 131 */ 132 BTRFS_FS_STATE_REMOUNTING, 133 /* Track if a transaction abort has been reported on this filesystem */ 134 BTRFS_FS_STATE_TRANS_ABORTED, 135 /* 136 * Bio operations should be blocked on this filesystem because a source 137 * or target device is being destroyed as part of a device replace 138 */ 139 BTRFS_FS_STATE_DEV_REPLACING, 140 /* The btrfs_fs_info created for self-tests */ 141 BTRFS_FS_STATE_DUMMY_FS_INFO, 142 }; 143 144 #define BTRFS_BACKREF_REV_MAX 256 145 #define BTRFS_BACKREF_REV_SHIFT 56 146 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 147 BTRFS_BACKREF_REV_SHIFT) 148 149 #define BTRFS_OLD_BACKREF_REV 0 150 #define BTRFS_MIXED_BACKREF_REV 1 151 152 /* 153 * every tree block (leaf or node) starts with this header. 154 */ 155 struct btrfs_header { 156 /* these first four must match the super block */ 157 u8 csum[BTRFS_CSUM_SIZE]; 158 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 159 __le64 bytenr; /* which block this node is supposed to live in */ 160 __le64 flags; 161 162 /* allowed to be different from the super from here on down */ 163 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 164 __le64 generation; 165 __le64 owner; 166 __le32 nritems; 167 u8 level; 168 } __attribute__ ((__packed__)); 169 170 /* 171 * this is a very generous portion of the super block, giving us 172 * room to translate 14 chunks with 3 stripes each. 173 */ 174 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 175 176 /* 177 * just in case we somehow lose the roots and are not able to mount, 178 * we store an array of the roots from previous transactions 179 * in the super. 180 */ 181 #define BTRFS_NUM_BACKUP_ROOTS 4 182 struct btrfs_root_backup { 183 __le64 tree_root; 184 __le64 tree_root_gen; 185 186 __le64 chunk_root; 187 __le64 chunk_root_gen; 188 189 __le64 extent_root; 190 __le64 extent_root_gen; 191 192 __le64 fs_root; 193 __le64 fs_root_gen; 194 195 __le64 dev_root; 196 __le64 dev_root_gen; 197 198 __le64 csum_root; 199 __le64 csum_root_gen; 200 201 __le64 total_bytes; 202 __le64 bytes_used; 203 __le64 num_devices; 204 /* future */ 205 __le64 unused_64[4]; 206 207 u8 tree_root_level; 208 u8 chunk_root_level; 209 u8 extent_root_level; 210 u8 fs_root_level; 211 u8 dev_root_level; 212 u8 csum_root_level; 213 /* future and to align */ 214 u8 unused_8[10]; 215 } __attribute__ ((__packed__)); 216 217 /* 218 * the super block basically lists the main trees of the FS 219 * it currently lacks any block count etc etc 220 */ 221 struct btrfs_super_block { 222 /* the first 4 fields must match struct btrfs_header */ 223 u8 csum[BTRFS_CSUM_SIZE]; 224 /* FS specific UUID, visible to user */ 225 u8 fsid[BTRFS_FSID_SIZE]; 226 __le64 bytenr; /* this block number */ 227 __le64 flags; 228 229 /* allowed to be different from the btrfs_header from here own down */ 230 __le64 magic; 231 __le64 generation; 232 __le64 root; 233 __le64 chunk_root; 234 __le64 log_root; 235 236 /* this will help find the new super based on the log root */ 237 __le64 log_root_transid; 238 __le64 total_bytes; 239 __le64 bytes_used; 240 __le64 root_dir_objectid; 241 __le64 num_devices; 242 __le32 sectorsize; 243 __le32 nodesize; 244 __le32 __unused_leafsize; 245 __le32 stripesize; 246 __le32 sys_chunk_array_size; 247 __le64 chunk_root_generation; 248 __le64 compat_flags; 249 __le64 compat_ro_flags; 250 __le64 incompat_flags; 251 __le16 csum_type; 252 u8 root_level; 253 u8 chunk_root_level; 254 u8 log_root_level; 255 struct btrfs_dev_item dev_item; 256 257 char label[BTRFS_LABEL_SIZE]; 258 259 __le64 cache_generation; 260 __le64 uuid_tree_generation; 261 262 /* the UUID written into btree blocks */ 263 u8 metadata_uuid[BTRFS_FSID_SIZE]; 264 265 /* future expansion */ 266 __le64 reserved[28]; 267 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 268 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 269 } __attribute__ ((__packed__)); 270 271 /* 272 * Compat flags that we support. If any incompat flags are set other than the 273 * ones specified below then we will fail to mount 274 */ 275 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 276 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 277 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 278 279 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 280 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 281 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 282 283 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 284 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 285 286 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 287 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 288 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 289 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 290 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 291 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 292 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 293 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 294 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 295 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 296 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 297 BTRFS_FEATURE_INCOMPAT_METADATA_UUID) 298 299 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 300 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 301 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 302 303 /* 304 * A leaf is full of items. offset and size tell us where to find 305 * the item in the leaf (relative to the start of the data area) 306 */ 307 struct btrfs_item { 308 struct btrfs_disk_key key; 309 __le32 offset; 310 __le32 size; 311 } __attribute__ ((__packed__)); 312 313 /* 314 * leaves have an item area and a data area: 315 * [item0, item1....itemN] [free space] [dataN...data1, data0] 316 * 317 * The data is separate from the items to get the keys closer together 318 * during searches. 319 */ 320 struct btrfs_leaf { 321 struct btrfs_header header; 322 struct btrfs_item items[]; 323 } __attribute__ ((__packed__)); 324 325 /* 326 * all non-leaf blocks are nodes, they hold only keys and pointers to 327 * other blocks 328 */ 329 struct btrfs_key_ptr { 330 struct btrfs_disk_key key; 331 __le64 blockptr; 332 __le64 generation; 333 } __attribute__ ((__packed__)); 334 335 struct btrfs_node { 336 struct btrfs_header header; 337 struct btrfs_key_ptr ptrs[]; 338 } __attribute__ ((__packed__)); 339 340 /* 341 * btrfs_paths remember the path taken from the root down to the leaf. 342 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 343 * to any other levels that are present. 344 * 345 * The slots array records the index of the item or block pointer 346 * used while walking the tree. 347 */ 348 enum { READA_NONE, READA_BACK, READA_FORWARD }; 349 struct btrfs_path { 350 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 351 int slots[BTRFS_MAX_LEVEL]; 352 /* if there is real range locking, this locks field will change */ 353 u8 locks[BTRFS_MAX_LEVEL]; 354 u8 reada; 355 /* keep some upper locks as we walk down */ 356 u8 lowest_level; 357 358 /* 359 * set by btrfs_split_item, tells search_slot to keep all locks 360 * and to force calls to keep space in the nodes 361 */ 362 unsigned int search_for_split:1; 363 unsigned int keep_locks:1; 364 unsigned int skip_locking:1; 365 unsigned int leave_spinning:1; 366 unsigned int search_commit_root:1; 367 unsigned int need_commit_sem:1; 368 unsigned int skip_release_on_error:1; 369 }; 370 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 371 sizeof(struct btrfs_item)) 372 struct btrfs_dev_replace { 373 u64 replace_state; /* see #define above */ 374 time64_t time_started; /* seconds since 1-Jan-1970 */ 375 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 376 atomic64_t num_write_errors; 377 atomic64_t num_uncorrectable_read_errors; 378 379 u64 cursor_left; 380 u64 committed_cursor_left; 381 u64 cursor_left_last_write_of_item; 382 u64 cursor_right; 383 384 u64 cont_reading_from_srcdev_mode; /* see #define above */ 385 386 int is_valid; 387 int item_needs_writeback; 388 struct btrfs_device *srcdev; 389 struct btrfs_device *tgtdev; 390 391 struct mutex lock_finishing_cancel_unmount; 392 struct rw_semaphore rwsem; 393 394 struct btrfs_scrub_progress scrub_progress; 395 396 struct percpu_counter bio_counter; 397 wait_queue_head_t replace_wait; 398 }; 399 400 /* For raid type sysfs entries */ 401 struct raid_kobject { 402 u64 flags; 403 struct kobject kobj; 404 struct list_head list; 405 }; 406 407 /* 408 * free clusters are used to claim free space in relatively large chunks, 409 * allowing us to do less seeky writes. They are used for all metadata 410 * allocations. In ssd_spread mode they are also used for data allocations. 411 */ 412 struct btrfs_free_cluster { 413 spinlock_t lock; 414 spinlock_t refill_lock; 415 struct rb_root root; 416 417 /* largest extent in this cluster */ 418 u64 max_size; 419 420 /* first extent starting offset */ 421 u64 window_start; 422 423 /* We did a full search and couldn't create a cluster */ 424 bool fragmented; 425 426 struct btrfs_block_group_cache *block_group; 427 /* 428 * when a cluster is allocated from a block group, we put the 429 * cluster onto a list in the block group so that it can 430 * be freed before the block group is freed. 431 */ 432 struct list_head block_group_list; 433 }; 434 435 enum btrfs_caching_type { 436 BTRFS_CACHE_NO, 437 BTRFS_CACHE_STARTED, 438 BTRFS_CACHE_FAST, 439 BTRFS_CACHE_FINISHED, 440 BTRFS_CACHE_ERROR, 441 }; 442 443 enum btrfs_disk_cache_state { 444 BTRFS_DC_WRITTEN, 445 BTRFS_DC_ERROR, 446 BTRFS_DC_CLEAR, 447 BTRFS_DC_SETUP, 448 }; 449 450 struct btrfs_caching_control { 451 struct list_head list; 452 struct mutex mutex; 453 wait_queue_head_t wait; 454 struct btrfs_work work; 455 struct btrfs_block_group_cache *block_group; 456 u64 progress; 457 refcount_t count; 458 }; 459 460 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 461 #define CACHING_CTL_WAKE_UP SZ_2M 462 463 struct btrfs_io_ctl { 464 void *cur, *orig; 465 struct page *page; 466 struct page **pages; 467 struct btrfs_fs_info *fs_info; 468 struct inode *inode; 469 unsigned long size; 470 int index; 471 int num_pages; 472 int entries; 473 int bitmaps; 474 unsigned check_crcs:1; 475 }; 476 477 /* 478 * Tree to record all locked full stripes of a RAID5/6 block group 479 */ 480 struct btrfs_full_stripe_locks_tree { 481 struct rb_root root; 482 struct mutex lock; 483 }; 484 485 struct btrfs_block_group_cache { 486 struct btrfs_key key; 487 struct btrfs_block_group_item item; 488 struct btrfs_fs_info *fs_info; 489 struct inode *inode; 490 spinlock_t lock; 491 u64 pinned; 492 u64 reserved; 493 u64 delalloc_bytes; 494 u64 bytes_super; 495 u64 flags; 496 u64 cache_generation; 497 498 /* 499 * If the free space extent count exceeds this number, convert the block 500 * group to bitmaps. 501 */ 502 u32 bitmap_high_thresh; 503 504 /* 505 * If the free space extent count drops below this number, convert the 506 * block group back to extents. 507 */ 508 u32 bitmap_low_thresh; 509 510 /* 511 * It is just used for the delayed data space allocation because 512 * only the data space allocation and the relative metadata update 513 * can be done cross the transaction. 514 */ 515 struct rw_semaphore data_rwsem; 516 517 /* for raid56, this is a full stripe, without parity */ 518 unsigned long full_stripe_len; 519 520 unsigned int ro; 521 unsigned int iref:1; 522 unsigned int has_caching_ctl:1; 523 unsigned int removed:1; 524 525 int disk_cache_state; 526 527 /* cache tracking stuff */ 528 int cached; 529 struct btrfs_caching_control *caching_ctl; 530 u64 last_byte_to_unpin; 531 532 struct btrfs_space_info *space_info; 533 534 /* free space cache stuff */ 535 struct btrfs_free_space_ctl *free_space_ctl; 536 537 /* block group cache stuff */ 538 struct rb_node cache_node; 539 540 /* for block groups in the same raid type */ 541 struct list_head list; 542 543 /* usage count */ 544 atomic_t count; 545 546 /* List of struct btrfs_free_clusters for this block group. 547 * Today it will only have one thing on it, but that may change 548 */ 549 struct list_head cluster_list; 550 551 /* For delayed block group creation or deletion of empty block groups */ 552 struct list_head bg_list; 553 554 /* For read-only block groups */ 555 struct list_head ro_list; 556 557 atomic_t trimming; 558 559 /* For dirty block groups */ 560 struct list_head dirty_list; 561 struct list_head io_list; 562 563 struct btrfs_io_ctl io_ctl; 564 565 /* 566 * Incremented when doing extent allocations and holding a read lock 567 * on the space_info's groups_sem semaphore. 568 * Decremented when an ordered extent that represents an IO against this 569 * block group's range is created (after it's added to its inode's 570 * root's list of ordered extents) or immediately after the allocation 571 * if it's a metadata extent or fallocate extent (for these cases we 572 * don't create ordered extents). 573 */ 574 atomic_t reservations; 575 576 /* 577 * Incremented while holding the spinlock *lock* by a task checking if 578 * it can perform a nocow write (incremented if the value for the *ro* 579 * field is 0). Decremented by such tasks once they create an ordered 580 * extent or before that if some error happens before reaching that step. 581 * This is to prevent races between block group relocation and nocow 582 * writes through direct IO. 583 */ 584 atomic_t nocow_writers; 585 586 /* Lock for free space tree operations. */ 587 struct mutex free_space_lock; 588 589 /* 590 * Does the block group need to be added to the free space tree? 591 * Protected by free_space_lock. 592 */ 593 int needs_free_space; 594 595 /* Record locked full stripes for RAID5/6 block group */ 596 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 597 }; 598 599 /* delayed seq elem */ 600 struct seq_list { 601 struct list_head list; 602 u64 seq; 603 }; 604 605 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 606 607 #define SEQ_LAST ((u64)-1) 608 609 enum btrfs_orphan_cleanup_state { 610 ORPHAN_CLEANUP_STARTED = 1, 611 ORPHAN_CLEANUP_DONE = 2, 612 }; 613 614 /* used by the raid56 code to lock stripes for read/modify/write */ 615 struct btrfs_stripe_hash { 616 struct list_head hash_list; 617 spinlock_t lock; 618 }; 619 620 /* used by the raid56 code to lock stripes for read/modify/write */ 621 struct btrfs_stripe_hash_table { 622 struct list_head stripe_cache; 623 spinlock_t cache_lock; 624 int cache_size; 625 struct btrfs_stripe_hash table[]; 626 }; 627 628 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 629 630 void btrfs_init_async_reclaim_work(struct work_struct *work); 631 632 /* fs_info */ 633 struct reloc_control; 634 struct btrfs_device; 635 struct btrfs_fs_devices; 636 struct btrfs_balance_control; 637 struct btrfs_delayed_root; 638 639 /* 640 * Block group or device which contains an active swapfile. Used for preventing 641 * unsafe operations while a swapfile is active. 642 * 643 * These are sorted on (ptr, inode) (note that a block group or device can 644 * contain more than one swapfile). We compare the pointer values because we 645 * don't actually care what the object is, we just need a quick check whether 646 * the object exists in the rbtree. 647 */ 648 struct btrfs_swapfile_pin { 649 struct rb_node node; 650 void *ptr; 651 struct inode *inode; 652 /* 653 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise, 654 * ptr points to a struct btrfs_device. 655 */ 656 bool is_block_group; 657 }; 658 659 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 660 661 enum { 662 BTRFS_FS_BARRIER, 663 BTRFS_FS_CLOSING_START, 664 BTRFS_FS_CLOSING_DONE, 665 BTRFS_FS_LOG_RECOVERING, 666 BTRFS_FS_OPEN, 667 BTRFS_FS_QUOTA_ENABLED, 668 BTRFS_FS_UPDATE_UUID_TREE_GEN, 669 BTRFS_FS_CREATING_FREE_SPACE_TREE, 670 BTRFS_FS_BTREE_ERR, 671 BTRFS_FS_LOG1_ERR, 672 BTRFS_FS_LOG2_ERR, 673 BTRFS_FS_QUOTA_OVERRIDE, 674 /* Used to record internally whether fs has been frozen */ 675 BTRFS_FS_FROZEN, 676 /* 677 * Indicate that a whole-filesystem exclusive operation is running 678 * (device replace, resize, device add/delete, balance) 679 */ 680 BTRFS_FS_EXCL_OP, 681 /* 682 * To info transaction_kthread we need an immediate commit so it 683 * doesn't need to wait for commit_interval 684 */ 685 BTRFS_FS_NEED_ASYNC_COMMIT, 686 /* 687 * Indicate that balance has been set up from the ioctl and is in the 688 * main phase. The fs_info::balance_ctl is initialized. 689 * Set and cleared while holding fs_info::balance_mutex. 690 */ 691 BTRFS_FS_BALANCE_RUNNING, 692 693 /* Indicate that the cleaner thread is awake and doing something. */ 694 BTRFS_FS_CLEANER_RUNNING, 695 696 /* 697 * The checksumming has an optimized version and is considered fast, 698 * so we don't need to offload checksums to workqueues. 699 */ 700 BTRFS_FS_CSUM_IMPL_FAST, 701 }; 702 703 struct btrfs_fs_info { 704 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 705 unsigned long flags; 706 struct btrfs_root *extent_root; 707 struct btrfs_root *tree_root; 708 struct btrfs_root *chunk_root; 709 struct btrfs_root *dev_root; 710 struct btrfs_root *fs_root; 711 struct btrfs_root *csum_root; 712 struct btrfs_root *quota_root; 713 struct btrfs_root *uuid_root; 714 struct btrfs_root *free_space_root; 715 716 /* the log root tree is a directory of all the other log roots */ 717 struct btrfs_root *log_root_tree; 718 719 spinlock_t fs_roots_radix_lock; 720 struct radix_tree_root fs_roots_radix; 721 722 /* block group cache stuff */ 723 spinlock_t block_group_cache_lock; 724 u64 first_logical_byte; 725 struct rb_root block_group_cache_tree; 726 727 /* keep track of unallocated space */ 728 atomic64_t free_chunk_space; 729 730 struct extent_io_tree freed_extents[2]; 731 struct extent_io_tree *pinned_extents; 732 733 /* logical->physical extent mapping */ 734 struct extent_map_tree mapping_tree; 735 736 /* 737 * block reservation for extent, checksum, root tree and 738 * delayed dir index item 739 */ 740 struct btrfs_block_rsv global_block_rsv; 741 /* block reservation for metadata operations */ 742 struct btrfs_block_rsv trans_block_rsv; 743 /* block reservation for chunk tree */ 744 struct btrfs_block_rsv chunk_block_rsv; 745 /* block reservation for delayed operations */ 746 struct btrfs_block_rsv delayed_block_rsv; 747 /* block reservation for delayed refs */ 748 struct btrfs_block_rsv delayed_refs_rsv; 749 750 struct btrfs_block_rsv empty_block_rsv; 751 752 u64 generation; 753 u64 last_trans_committed; 754 u64 avg_delayed_ref_runtime; 755 756 /* 757 * this is updated to the current trans every time a full commit 758 * is required instead of the faster short fsync log commits 759 */ 760 u64 last_trans_log_full_commit; 761 unsigned long mount_opt; 762 /* 763 * Track requests for actions that need to be done during transaction 764 * commit (like for some mount options). 765 */ 766 unsigned long pending_changes; 767 unsigned long compress_type:4; 768 unsigned int compress_level; 769 u32 commit_interval; 770 /* 771 * It is a suggestive number, the read side is safe even it gets a 772 * wrong number because we will write out the data into a regular 773 * extent. The write side(mount/remount) is under ->s_umount lock, 774 * so it is also safe. 775 */ 776 u64 max_inline; 777 778 struct btrfs_transaction *running_transaction; 779 wait_queue_head_t transaction_throttle; 780 wait_queue_head_t transaction_wait; 781 wait_queue_head_t transaction_blocked_wait; 782 wait_queue_head_t async_submit_wait; 783 784 /* 785 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 786 * when they are updated. 787 * 788 * Because we do not clear the flags for ever, so we needn't use 789 * the lock on the read side. 790 * 791 * We also needn't use the lock when we mount the fs, because 792 * there is no other task which will update the flag. 793 */ 794 spinlock_t super_lock; 795 struct btrfs_super_block *super_copy; 796 struct btrfs_super_block *super_for_commit; 797 struct super_block *sb; 798 struct inode *btree_inode; 799 struct mutex tree_log_mutex; 800 struct mutex transaction_kthread_mutex; 801 struct mutex cleaner_mutex; 802 struct mutex chunk_mutex; 803 804 /* 805 * this is taken to make sure we don't set block groups ro after 806 * the free space cache has been allocated on them 807 */ 808 struct mutex ro_block_group_mutex; 809 810 /* this is used during read/modify/write to make sure 811 * no two ios are trying to mod the same stripe at the same 812 * time 813 */ 814 struct btrfs_stripe_hash_table *stripe_hash_table; 815 816 /* 817 * this protects the ordered operations list only while we are 818 * processing all of the entries on it. This way we make 819 * sure the commit code doesn't find the list temporarily empty 820 * because another function happens to be doing non-waiting preflush 821 * before jumping into the main commit. 822 */ 823 struct mutex ordered_operations_mutex; 824 825 struct rw_semaphore commit_root_sem; 826 827 struct rw_semaphore cleanup_work_sem; 828 829 struct rw_semaphore subvol_sem; 830 struct srcu_struct subvol_srcu; 831 832 spinlock_t trans_lock; 833 /* 834 * the reloc mutex goes with the trans lock, it is taken 835 * during commit to protect us from the relocation code 836 */ 837 struct mutex reloc_mutex; 838 839 struct list_head trans_list; 840 struct list_head dead_roots; 841 struct list_head caching_block_groups; 842 843 spinlock_t delayed_iput_lock; 844 struct list_head delayed_iputs; 845 atomic_t nr_delayed_iputs; 846 wait_queue_head_t delayed_iputs_wait; 847 848 /* this protects tree_mod_seq_list */ 849 spinlock_t tree_mod_seq_lock; 850 atomic64_t tree_mod_seq; 851 struct list_head tree_mod_seq_list; 852 853 /* this protects tree_mod_log */ 854 rwlock_t tree_mod_log_lock; 855 struct rb_root tree_mod_log; 856 857 atomic_t async_delalloc_pages; 858 859 /* 860 * this is used to protect the following list -- ordered_roots. 861 */ 862 spinlock_t ordered_root_lock; 863 864 /* 865 * all fs/file tree roots in which there are data=ordered extents 866 * pending writeback are added into this list. 867 * 868 * these can span multiple transactions and basically include 869 * every dirty data page that isn't from nodatacow 870 */ 871 struct list_head ordered_roots; 872 873 struct mutex delalloc_root_mutex; 874 spinlock_t delalloc_root_lock; 875 /* all fs/file tree roots that have delalloc inodes. */ 876 struct list_head delalloc_roots; 877 878 /* 879 * there is a pool of worker threads for checksumming during writes 880 * and a pool for checksumming after reads. This is because readers 881 * can run with FS locks held, and the writers may be waiting for 882 * those locks. We don't want ordering in the pending list to cause 883 * deadlocks, and so the two are serviced separately. 884 * 885 * A third pool does submit_bio to avoid deadlocking with the other 886 * two 887 */ 888 struct btrfs_workqueue *workers; 889 struct btrfs_workqueue *delalloc_workers; 890 struct btrfs_workqueue *flush_workers; 891 struct btrfs_workqueue *endio_workers; 892 struct btrfs_workqueue *endio_meta_workers; 893 struct btrfs_workqueue *endio_raid56_workers; 894 struct btrfs_workqueue *endio_repair_workers; 895 struct btrfs_workqueue *rmw_workers; 896 struct btrfs_workqueue *endio_meta_write_workers; 897 struct btrfs_workqueue *endio_write_workers; 898 struct btrfs_workqueue *endio_freespace_worker; 899 struct btrfs_workqueue *submit_workers; 900 struct btrfs_workqueue *caching_workers; 901 struct btrfs_workqueue *readahead_workers; 902 903 /* 904 * fixup workers take dirty pages that didn't properly go through 905 * the cow mechanism and make them safe to write. It happens 906 * for the sys_munmap function call path 907 */ 908 struct btrfs_workqueue *fixup_workers; 909 struct btrfs_workqueue *delayed_workers; 910 911 /* the extent workers do delayed refs on the extent allocation tree */ 912 struct btrfs_workqueue *extent_workers; 913 struct task_struct *transaction_kthread; 914 struct task_struct *cleaner_kthread; 915 u32 thread_pool_size; 916 917 struct kobject *space_info_kobj; 918 struct list_head pending_raid_kobjs; 919 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 920 921 u64 total_pinned; 922 923 /* used to keep from writing metadata until there is a nice batch */ 924 struct percpu_counter dirty_metadata_bytes; 925 struct percpu_counter delalloc_bytes; 926 struct percpu_counter dio_bytes; 927 s32 dirty_metadata_batch; 928 s32 delalloc_batch; 929 930 struct list_head dirty_cowonly_roots; 931 932 struct btrfs_fs_devices *fs_devices; 933 934 /* 935 * The space_info list is effectively read only after initial 936 * setup. It is populated at mount time and cleaned up after 937 * all block groups are removed. RCU is used to protect it. 938 */ 939 struct list_head space_info; 940 941 struct btrfs_space_info *data_sinfo; 942 943 struct reloc_control *reloc_ctl; 944 945 /* data_alloc_cluster is only used in ssd_spread mode */ 946 struct btrfs_free_cluster data_alloc_cluster; 947 948 /* all metadata allocations go through this cluster */ 949 struct btrfs_free_cluster meta_alloc_cluster; 950 951 /* auto defrag inodes go here */ 952 spinlock_t defrag_inodes_lock; 953 struct rb_root defrag_inodes; 954 atomic_t defrag_running; 955 956 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 957 seqlock_t profiles_lock; 958 /* 959 * these three are in extended format (availability of single 960 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 961 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 962 */ 963 u64 avail_data_alloc_bits; 964 u64 avail_metadata_alloc_bits; 965 u64 avail_system_alloc_bits; 966 967 /* restriper state */ 968 spinlock_t balance_lock; 969 struct mutex balance_mutex; 970 atomic_t balance_pause_req; 971 atomic_t balance_cancel_req; 972 struct btrfs_balance_control *balance_ctl; 973 wait_queue_head_t balance_wait_q; 974 975 u32 data_chunk_allocations; 976 u32 metadata_ratio; 977 978 void *bdev_holder; 979 980 /* private scrub information */ 981 struct mutex scrub_lock; 982 atomic_t scrubs_running; 983 atomic_t scrub_pause_req; 984 atomic_t scrubs_paused; 985 atomic_t scrub_cancel_req; 986 wait_queue_head_t scrub_pause_wait; 987 /* 988 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 989 * running. 990 */ 991 refcount_t scrub_workers_refcnt; 992 struct btrfs_workqueue *scrub_workers; 993 struct btrfs_workqueue *scrub_wr_completion_workers; 994 struct btrfs_workqueue *scrub_parity_workers; 995 996 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 997 u32 check_integrity_print_mask; 998 #endif 999 /* is qgroup tracking in a consistent state? */ 1000 u64 qgroup_flags; 1001 1002 /* holds configuration and tracking. Protected by qgroup_lock */ 1003 struct rb_root qgroup_tree; 1004 spinlock_t qgroup_lock; 1005 1006 /* 1007 * used to avoid frequently calling ulist_alloc()/ulist_free() 1008 * when doing qgroup accounting, it must be protected by qgroup_lock. 1009 */ 1010 struct ulist *qgroup_ulist; 1011 1012 /* protect user change for quota operations */ 1013 struct mutex qgroup_ioctl_lock; 1014 1015 /* list of dirty qgroups to be written at next commit */ 1016 struct list_head dirty_qgroups; 1017 1018 /* used by qgroup for an efficient tree traversal */ 1019 u64 qgroup_seq; 1020 1021 /* qgroup rescan items */ 1022 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1023 struct btrfs_key qgroup_rescan_progress; 1024 struct btrfs_workqueue *qgroup_rescan_workers; 1025 struct completion qgroup_rescan_completion; 1026 struct btrfs_work qgroup_rescan_work; 1027 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1028 1029 /* filesystem state */ 1030 unsigned long fs_state; 1031 1032 struct btrfs_delayed_root *delayed_root; 1033 1034 /* readahead tree */ 1035 spinlock_t reada_lock; 1036 struct radix_tree_root reada_tree; 1037 1038 /* readahead works cnt */ 1039 atomic_t reada_works_cnt; 1040 1041 /* Extent buffer radix tree */ 1042 spinlock_t buffer_lock; 1043 struct radix_tree_root buffer_radix; 1044 1045 /* next backup root to be overwritten */ 1046 int backup_root_index; 1047 1048 /* device replace state */ 1049 struct btrfs_dev_replace dev_replace; 1050 1051 struct semaphore uuid_tree_rescan_sem; 1052 1053 /* Used to reclaim the metadata space in the background. */ 1054 struct work_struct async_reclaim_work; 1055 1056 spinlock_t unused_bgs_lock; 1057 struct list_head unused_bgs; 1058 struct mutex unused_bg_unpin_mutex; 1059 struct mutex delete_unused_bgs_mutex; 1060 1061 /* Cached block sizes */ 1062 u32 nodesize; 1063 u32 sectorsize; 1064 u32 stripesize; 1065 1066 /* Block groups and devices containing active swapfiles. */ 1067 spinlock_t swapfile_pins_lock; 1068 struct rb_root swapfile_pins; 1069 1070 struct crypto_shash *csum_shash; 1071 1072 /* 1073 * Number of send operations in progress. 1074 * Updated while holding fs_info::balance_mutex. 1075 */ 1076 int send_in_progress; 1077 1078 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1079 spinlock_t ref_verify_lock; 1080 struct rb_root block_tree; 1081 #endif 1082 }; 1083 1084 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1085 { 1086 return sb->s_fs_info; 1087 } 1088 1089 struct btrfs_subvolume_writers { 1090 struct percpu_counter counter; 1091 wait_queue_head_t wait; 1092 }; 1093 1094 /* 1095 * The state of btrfs root 1096 */ 1097 enum { 1098 /* 1099 * btrfs_record_root_in_trans is a multi-step process, and it can race 1100 * with the balancing code. But the race is very small, and only the 1101 * first time the root is added to each transaction. So IN_TRANS_SETUP 1102 * is used to tell us when more checks are required 1103 */ 1104 BTRFS_ROOT_IN_TRANS_SETUP, 1105 BTRFS_ROOT_REF_COWS, 1106 BTRFS_ROOT_TRACK_DIRTY, 1107 BTRFS_ROOT_IN_RADIX, 1108 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1109 BTRFS_ROOT_DEFRAG_RUNNING, 1110 BTRFS_ROOT_FORCE_COW, 1111 BTRFS_ROOT_MULTI_LOG_TASKS, 1112 BTRFS_ROOT_DIRTY, 1113 BTRFS_ROOT_DELETING, 1114 1115 /* 1116 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1117 * 1118 * Set for the subvolume tree owning the reloc tree. 1119 */ 1120 BTRFS_ROOT_DEAD_RELOC_TREE, 1121 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1122 BTRFS_ROOT_DEAD_TREE, 1123 }; 1124 1125 /* 1126 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1127 * code. For detail check comment in fs/btrfs/qgroup.c. 1128 */ 1129 struct btrfs_qgroup_swapped_blocks { 1130 spinlock_t lock; 1131 /* RM_EMPTY_ROOT() of above blocks[] */ 1132 bool swapped; 1133 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1134 }; 1135 1136 /* 1137 * in ram representation of the tree. extent_root is used for all allocations 1138 * and for the extent tree extent_root root. 1139 */ 1140 struct btrfs_root { 1141 struct extent_buffer *node; 1142 1143 struct extent_buffer *commit_root; 1144 struct btrfs_root *log_root; 1145 struct btrfs_root *reloc_root; 1146 1147 unsigned long state; 1148 struct btrfs_root_item root_item; 1149 struct btrfs_key root_key; 1150 struct btrfs_fs_info *fs_info; 1151 struct extent_io_tree dirty_log_pages; 1152 1153 struct mutex objectid_mutex; 1154 1155 spinlock_t accounting_lock; 1156 struct btrfs_block_rsv *block_rsv; 1157 1158 /* free ino cache stuff */ 1159 struct btrfs_free_space_ctl *free_ino_ctl; 1160 enum btrfs_caching_type ino_cache_state; 1161 spinlock_t ino_cache_lock; 1162 wait_queue_head_t ino_cache_wait; 1163 struct btrfs_free_space_ctl *free_ino_pinned; 1164 u64 ino_cache_progress; 1165 struct inode *ino_cache_inode; 1166 1167 struct mutex log_mutex; 1168 wait_queue_head_t log_writer_wait; 1169 wait_queue_head_t log_commit_wait[2]; 1170 struct list_head log_ctxs[2]; 1171 atomic_t log_writers; 1172 atomic_t log_commit[2]; 1173 atomic_t log_batch; 1174 int log_transid; 1175 /* No matter the commit succeeds or not*/ 1176 int log_transid_committed; 1177 /* Just be updated when the commit succeeds. */ 1178 int last_log_commit; 1179 pid_t log_start_pid; 1180 1181 u64 last_trans; 1182 1183 u32 type; 1184 1185 u64 highest_objectid; 1186 1187 u64 defrag_trans_start; 1188 struct btrfs_key defrag_progress; 1189 struct btrfs_key defrag_max; 1190 1191 /* the dirty list is only used by non-reference counted roots */ 1192 struct list_head dirty_list; 1193 1194 struct list_head root_list; 1195 1196 spinlock_t log_extents_lock[2]; 1197 struct list_head logged_list[2]; 1198 1199 int orphan_cleanup_state; 1200 1201 spinlock_t inode_lock; 1202 /* red-black tree that keeps track of in-memory inodes */ 1203 struct rb_root inode_tree; 1204 1205 /* 1206 * radix tree that keeps track of delayed nodes of every inode, 1207 * protected by inode_lock 1208 */ 1209 struct radix_tree_root delayed_nodes_tree; 1210 /* 1211 * right now this just gets used so that a root has its own devid 1212 * for stat. It may be used for more later 1213 */ 1214 dev_t anon_dev; 1215 1216 spinlock_t root_item_lock; 1217 refcount_t refs; 1218 1219 struct mutex delalloc_mutex; 1220 spinlock_t delalloc_lock; 1221 /* 1222 * all of the inodes that have delalloc bytes. It is possible for 1223 * this list to be empty even when there is still dirty data=ordered 1224 * extents waiting to finish IO. 1225 */ 1226 struct list_head delalloc_inodes; 1227 struct list_head delalloc_root; 1228 u64 nr_delalloc_inodes; 1229 1230 struct mutex ordered_extent_mutex; 1231 /* 1232 * this is used by the balancing code to wait for all the pending 1233 * ordered extents 1234 */ 1235 spinlock_t ordered_extent_lock; 1236 1237 /* 1238 * all of the data=ordered extents pending writeback 1239 * these can span multiple transactions and basically include 1240 * every dirty data page that isn't from nodatacow 1241 */ 1242 struct list_head ordered_extents; 1243 struct list_head ordered_root; 1244 u64 nr_ordered_extents; 1245 1246 /* 1247 * Not empty if this subvolume root has gone through tree block swap 1248 * (relocation) 1249 * 1250 * Will be used by reloc_control::dirty_subvol_roots. 1251 */ 1252 struct list_head reloc_dirty_list; 1253 1254 /* 1255 * Number of currently running SEND ioctls to prevent 1256 * manipulation with the read-only status via SUBVOL_SETFLAGS 1257 */ 1258 int send_in_progress; 1259 /* 1260 * Number of currently running deduplication operations that have a 1261 * destination inode belonging to this root. Protected by the lock 1262 * root_item_lock. 1263 */ 1264 int dedupe_in_progress; 1265 struct btrfs_subvolume_writers *subv_writers; 1266 atomic_t will_be_snapshotted; 1267 atomic_t snapshot_force_cow; 1268 1269 /* For qgroup metadata reserved space */ 1270 spinlock_t qgroup_meta_rsv_lock; 1271 u64 qgroup_meta_rsv_pertrans; 1272 u64 qgroup_meta_rsv_prealloc; 1273 1274 /* Number of active swapfiles */ 1275 atomic_t nr_swapfiles; 1276 1277 /* Record pairs of swapped blocks for qgroup */ 1278 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1279 1280 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1281 u64 alloc_bytenr; 1282 #endif 1283 }; 1284 1285 struct btrfs_file_private { 1286 void *filldir_buf; 1287 }; 1288 1289 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1290 { 1291 return btrfs_sb(inode->i_sb)->sectorsize; 1292 } 1293 1294 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1295 { 1296 1297 return info->nodesize - sizeof(struct btrfs_header); 1298 } 1299 1300 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1301 1302 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1303 { 1304 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1305 } 1306 1307 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1308 { 1309 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1310 } 1311 1312 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1313 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1314 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1315 { 1316 return BTRFS_MAX_ITEM_SIZE(info) - 1317 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1318 } 1319 1320 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1321 { 1322 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1323 } 1324 1325 /* 1326 * Flags for mount options. 1327 * 1328 * Note: don't forget to add new options to btrfs_show_options() 1329 */ 1330 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1331 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1332 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1333 #define BTRFS_MOUNT_SSD (1 << 3) 1334 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1335 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1336 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1337 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1338 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1339 #define BTRFS_MOUNT_NOSSD (1 << 9) 1340 #define BTRFS_MOUNT_DISCARD (1 << 10) 1341 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1342 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1343 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1344 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1345 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1346 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1347 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1348 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1349 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1350 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1351 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1352 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1353 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1354 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1355 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1356 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1357 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1358 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1359 1360 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1361 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1362 1363 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1364 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1365 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1366 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1367 BTRFS_MOUNT_##opt) 1368 1369 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1370 { \ 1371 if (!btrfs_test_opt(fs_info, opt)) \ 1372 btrfs_info(fs_info, fmt, ##args); \ 1373 btrfs_set_opt(fs_info->mount_opt, opt); \ 1374 } 1375 1376 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1377 { \ 1378 if (btrfs_test_opt(fs_info, opt)) \ 1379 btrfs_info(fs_info, fmt, ##args); \ 1380 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1381 } 1382 1383 #ifdef CONFIG_BTRFS_DEBUG 1384 static inline int 1385 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1386 { 1387 struct btrfs_fs_info *fs_info = block_group->fs_info; 1388 1389 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1390 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1391 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1392 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1393 } 1394 #endif 1395 1396 /* 1397 * Requests for changes that need to be done during transaction commit. 1398 * 1399 * Internal mount options that are used for special handling of the real 1400 * mount options (eg. cannot be set during remount and have to be set during 1401 * transaction commit) 1402 */ 1403 1404 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1405 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1406 #define BTRFS_PENDING_COMMIT (2) 1407 1408 #define btrfs_test_pending(info, opt) \ 1409 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1410 #define btrfs_set_pending(info, opt) \ 1411 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1412 #define btrfs_clear_pending(info, opt) \ 1413 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1414 1415 /* 1416 * Helpers for setting pending mount option changes. 1417 * 1418 * Expects corresponding macros 1419 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1420 */ 1421 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1422 do { \ 1423 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1424 btrfs_info((info), fmt, ##args); \ 1425 btrfs_set_pending((info), SET_##opt); \ 1426 btrfs_clear_pending((info), CLEAR_##opt); \ 1427 } \ 1428 } while(0) 1429 1430 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1431 do { \ 1432 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1433 btrfs_info((info), fmt, ##args); \ 1434 btrfs_set_pending((info), CLEAR_##opt); \ 1435 btrfs_clear_pending((info), SET_##opt); \ 1436 } \ 1437 } while(0) 1438 1439 /* 1440 * Inode flags 1441 */ 1442 #define BTRFS_INODE_NODATASUM (1 << 0) 1443 #define BTRFS_INODE_NODATACOW (1 << 1) 1444 #define BTRFS_INODE_READONLY (1 << 2) 1445 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1446 #define BTRFS_INODE_PREALLOC (1 << 4) 1447 #define BTRFS_INODE_SYNC (1 << 5) 1448 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1449 #define BTRFS_INODE_APPEND (1 << 7) 1450 #define BTRFS_INODE_NODUMP (1 << 8) 1451 #define BTRFS_INODE_NOATIME (1 << 9) 1452 #define BTRFS_INODE_DIRSYNC (1 << 10) 1453 #define BTRFS_INODE_COMPRESS (1 << 11) 1454 1455 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1456 1457 #define BTRFS_INODE_FLAG_MASK \ 1458 (BTRFS_INODE_NODATASUM | \ 1459 BTRFS_INODE_NODATACOW | \ 1460 BTRFS_INODE_READONLY | \ 1461 BTRFS_INODE_NOCOMPRESS | \ 1462 BTRFS_INODE_PREALLOC | \ 1463 BTRFS_INODE_SYNC | \ 1464 BTRFS_INODE_IMMUTABLE | \ 1465 BTRFS_INODE_APPEND | \ 1466 BTRFS_INODE_NODUMP | \ 1467 BTRFS_INODE_NOATIME | \ 1468 BTRFS_INODE_DIRSYNC | \ 1469 BTRFS_INODE_COMPRESS | \ 1470 BTRFS_INODE_ROOT_ITEM_INIT) 1471 1472 struct btrfs_map_token { 1473 const struct extent_buffer *eb; 1474 char *kaddr; 1475 unsigned long offset; 1476 }; 1477 1478 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1479 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1480 1481 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1482 { 1483 token->kaddr = NULL; 1484 } 1485 1486 /* some macros to generate set/get functions for the struct fields. This 1487 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1488 * one for u8: 1489 */ 1490 #define le8_to_cpu(v) (v) 1491 #define cpu_to_le8(v) (v) 1492 #define __le8 u8 1493 1494 #define read_eb_member(eb, ptr, type, member, result) (\ 1495 read_extent_buffer(eb, (char *)(result), \ 1496 ((unsigned long)(ptr)) + \ 1497 offsetof(type, member), \ 1498 sizeof(((type *)0)->member))) 1499 1500 #define write_eb_member(eb, ptr, type, member, result) (\ 1501 write_extent_buffer(eb, (char *)(result), \ 1502 ((unsigned long)(ptr)) + \ 1503 offsetof(type, member), \ 1504 sizeof(((type *)0)->member))) 1505 1506 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1507 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1508 const void *ptr, unsigned long off, \ 1509 struct btrfs_map_token *token); \ 1510 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1511 unsigned long off, u##bits val, \ 1512 struct btrfs_map_token *token); \ 1513 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1514 const void *ptr, \ 1515 unsigned long off) \ 1516 { \ 1517 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1518 } \ 1519 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1520 unsigned long off, u##bits val) \ 1521 { \ 1522 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1523 } 1524 1525 DECLARE_BTRFS_SETGET_BITS(8) 1526 DECLARE_BTRFS_SETGET_BITS(16) 1527 DECLARE_BTRFS_SETGET_BITS(32) 1528 DECLARE_BTRFS_SETGET_BITS(64) 1529 1530 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1531 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1532 const type *s) \ 1533 { \ 1534 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1535 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1536 } \ 1537 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1538 u##bits val) \ 1539 { \ 1540 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1541 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1542 } \ 1543 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1544 const type *s, \ 1545 struct btrfs_map_token *token) \ 1546 { \ 1547 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1548 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1549 } \ 1550 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1551 type *s, u##bits val, \ 1552 struct btrfs_map_token *token) \ 1553 { \ 1554 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1555 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1556 } 1557 1558 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1559 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1560 { \ 1561 const type *p = page_address(eb->pages[0]); \ 1562 u##bits res = le##bits##_to_cpu(p->member); \ 1563 return res; \ 1564 } \ 1565 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1566 u##bits val) \ 1567 { \ 1568 type *p = page_address(eb->pages[0]); \ 1569 p->member = cpu_to_le##bits(val); \ 1570 } 1571 1572 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1573 static inline u##bits btrfs_##name(const type *s) \ 1574 { \ 1575 return le##bits##_to_cpu(s->member); \ 1576 } \ 1577 static inline void btrfs_set_##name(type *s, u##bits val) \ 1578 { \ 1579 s->member = cpu_to_le##bits(val); \ 1580 } 1581 1582 1583 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1584 struct btrfs_dev_item *s) 1585 { 1586 BUILD_BUG_ON(sizeof(u64) != 1587 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1588 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1589 total_bytes)); 1590 } 1591 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1592 struct btrfs_dev_item *s, 1593 u64 val) 1594 { 1595 BUILD_BUG_ON(sizeof(u64) != 1596 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1597 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1598 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1599 } 1600 1601 1602 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1603 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1604 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1605 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1606 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1607 start_offset, 64); 1608 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1609 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1610 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1611 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1612 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1613 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1614 1615 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1616 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1617 total_bytes, 64); 1618 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1619 bytes_used, 64); 1620 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1621 io_align, 32); 1622 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1623 io_width, 32); 1624 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1625 sector_size, 32); 1626 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1627 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1628 dev_group, 32); 1629 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1630 seek_speed, 8); 1631 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1632 bandwidth, 8); 1633 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1634 generation, 64); 1635 1636 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1637 { 1638 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1639 } 1640 1641 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1642 { 1643 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1644 } 1645 1646 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1647 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1648 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1649 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1650 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1651 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1652 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1653 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1654 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1655 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1656 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1657 1658 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1659 { 1660 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1661 } 1662 1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1666 stripe_len, 64); 1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1668 io_align, 32); 1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1670 io_width, 32); 1671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1672 sector_size, 32); 1673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1675 num_stripes, 16); 1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1677 sub_stripes, 16); 1678 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1679 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1680 1681 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1682 int nr) 1683 { 1684 unsigned long offset = (unsigned long)c; 1685 offset += offsetof(struct btrfs_chunk, stripe); 1686 offset += nr * sizeof(struct btrfs_stripe); 1687 return (struct btrfs_stripe *)offset; 1688 } 1689 1690 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1691 { 1692 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1693 } 1694 1695 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1696 struct btrfs_chunk *c, int nr) 1697 { 1698 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1699 } 1700 1701 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1702 struct btrfs_chunk *c, int nr) 1703 { 1704 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1705 } 1706 1707 /* struct btrfs_block_group_item */ 1708 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1709 used, 64); 1710 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1711 used, 64); 1712 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1713 struct btrfs_block_group_item, chunk_objectid, 64); 1714 1715 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1716 struct btrfs_block_group_item, chunk_objectid, 64); 1717 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1718 struct btrfs_block_group_item, flags, 64); 1719 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1720 struct btrfs_block_group_item, flags, 64); 1721 1722 /* struct btrfs_free_space_info */ 1723 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1724 extent_count, 32); 1725 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1726 1727 /* struct btrfs_inode_ref */ 1728 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1729 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1730 1731 /* struct btrfs_inode_extref */ 1732 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1733 parent_objectid, 64); 1734 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1735 name_len, 16); 1736 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1737 1738 /* struct btrfs_inode_item */ 1739 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1740 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1741 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1742 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1743 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1744 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1745 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1746 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1747 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1748 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1749 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1750 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1752 generation, 64); 1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1754 sequence, 64); 1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1756 transid, 64); 1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1759 nbytes, 64); 1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1761 block_group, 64); 1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1765 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1767 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1768 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1769 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1770 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1771 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1772 1773 /* struct btrfs_dev_extent */ 1774 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1775 chunk_tree, 64); 1776 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1777 chunk_objectid, 64); 1778 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1779 chunk_offset, 64); 1780 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1781 1782 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1783 { 1784 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1785 return (unsigned long)dev + ptr; 1786 } 1787 1788 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1789 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1790 generation, 64); 1791 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1792 1793 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1794 1795 1796 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1797 1798 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1799 struct btrfs_tree_block_info *item, 1800 struct btrfs_disk_key *key) 1801 { 1802 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1803 } 1804 1805 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1806 struct btrfs_tree_block_info *item, 1807 struct btrfs_disk_key *key) 1808 { 1809 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1810 } 1811 1812 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1813 root, 64); 1814 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1815 objectid, 64); 1816 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1817 offset, 64); 1818 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1819 count, 32); 1820 1821 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1822 count, 32); 1823 1824 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1825 type, 8); 1826 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1827 offset, 64); 1828 1829 static inline u32 btrfs_extent_inline_ref_size(int type) 1830 { 1831 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1832 type == BTRFS_SHARED_BLOCK_REF_KEY) 1833 return sizeof(struct btrfs_extent_inline_ref); 1834 if (type == BTRFS_SHARED_DATA_REF_KEY) 1835 return sizeof(struct btrfs_shared_data_ref) + 1836 sizeof(struct btrfs_extent_inline_ref); 1837 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1838 return sizeof(struct btrfs_extent_data_ref) + 1839 offsetof(struct btrfs_extent_inline_ref, offset); 1840 return 0; 1841 } 1842 1843 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1844 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1845 generation, 64); 1846 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1847 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1848 1849 /* struct btrfs_node */ 1850 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1851 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1852 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1853 blockptr, 64); 1854 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1855 generation, 64); 1856 1857 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1858 { 1859 unsigned long ptr; 1860 ptr = offsetof(struct btrfs_node, ptrs) + 1861 sizeof(struct btrfs_key_ptr) * nr; 1862 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1863 } 1864 1865 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1866 int nr, u64 val) 1867 { 1868 unsigned long ptr; 1869 ptr = offsetof(struct btrfs_node, ptrs) + 1870 sizeof(struct btrfs_key_ptr) * nr; 1871 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1872 } 1873 1874 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1875 { 1876 unsigned long ptr; 1877 ptr = offsetof(struct btrfs_node, ptrs) + 1878 sizeof(struct btrfs_key_ptr) * nr; 1879 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1880 } 1881 1882 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1883 int nr, u64 val) 1884 { 1885 unsigned long ptr; 1886 ptr = offsetof(struct btrfs_node, ptrs) + 1887 sizeof(struct btrfs_key_ptr) * nr; 1888 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1889 } 1890 1891 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1892 { 1893 return offsetof(struct btrfs_node, ptrs) + 1894 sizeof(struct btrfs_key_ptr) * nr; 1895 } 1896 1897 void btrfs_node_key(const struct extent_buffer *eb, 1898 struct btrfs_disk_key *disk_key, int nr); 1899 1900 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1901 struct btrfs_disk_key *disk_key, int nr) 1902 { 1903 unsigned long ptr; 1904 ptr = btrfs_node_key_ptr_offset(nr); 1905 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1906 struct btrfs_key_ptr, key, disk_key); 1907 } 1908 1909 /* struct btrfs_item */ 1910 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1911 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1912 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1913 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1914 1915 static inline unsigned long btrfs_item_nr_offset(int nr) 1916 { 1917 return offsetof(struct btrfs_leaf, items) + 1918 sizeof(struct btrfs_item) * nr; 1919 } 1920 1921 static inline struct btrfs_item *btrfs_item_nr(int nr) 1922 { 1923 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1924 } 1925 1926 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1927 struct btrfs_item *item) 1928 { 1929 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1930 } 1931 1932 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1933 { 1934 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1935 } 1936 1937 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1938 { 1939 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1940 } 1941 1942 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1943 { 1944 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1945 } 1946 1947 static inline void btrfs_item_key(const struct extent_buffer *eb, 1948 struct btrfs_disk_key *disk_key, int nr) 1949 { 1950 struct btrfs_item *item = btrfs_item_nr(nr); 1951 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1952 } 1953 1954 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1955 struct btrfs_disk_key *disk_key, int nr) 1956 { 1957 struct btrfs_item *item = btrfs_item_nr(nr); 1958 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1959 } 1960 1961 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1962 1963 /* 1964 * struct btrfs_root_ref 1965 */ 1966 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1967 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1968 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1969 1970 /* struct btrfs_dir_item */ 1971 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1972 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1973 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1974 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1975 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1976 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1977 data_len, 16); 1978 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1979 name_len, 16); 1980 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1981 transid, 64); 1982 1983 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1984 const struct btrfs_dir_item *item, 1985 struct btrfs_disk_key *key) 1986 { 1987 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1988 } 1989 1990 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1991 struct btrfs_dir_item *item, 1992 const struct btrfs_disk_key *key) 1993 { 1994 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1995 } 1996 1997 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1998 num_entries, 64); 1999 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 2000 num_bitmaps, 64); 2001 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 2002 generation, 64); 2003 2004 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 2005 const struct btrfs_free_space_header *h, 2006 struct btrfs_disk_key *key) 2007 { 2008 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2009 } 2010 2011 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 2012 struct btrfs_free_space_header *h, 2013 const struct btrfs_disk_key *key) 2014 { 2015 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2016 } 2017 2018 /* struct btrfs_disk_key */ 2019 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2020 objectid, 64); 2021 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2022 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2023 2024 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2025 const struct btrfs_disk_key *disk) 2026 { 2027 cpu->offset = le64_to_cpu(disk->offset); 2028 cpu->type = disk->type; 2029 cpu->objectid = le64_to_cpu(disk->objectid); 2030 } 2031 2032 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2033 const struct btrfs_key *cpu) 2034 { 2035 disk->offset = cpu_to_le64(cpu->offset); 2036 disk->type = cpu->type; 2037 disk->objectid = cpu_to_le64(cpu->objectid); 2038 } 2039 2040 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2041 struct btrfs_key *key, int nr) 2042 { 2043 struct btrfs_disk_key disk_key; 2044 btrfs_node_key(eb, &disk_key, nr); 2045 btrfs_disk_key_to_cpu(key, &disk_key); 2046 } 2047 2048 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2049 struct btrfs_key *key, int nr) 2050 { 2051 struct btrfs_disk_key disk_key; 2052 btrfs_item_key(eb, &disk_key, nr); 2053 btrfs_disk_key_to_cpu(key, &disk_key); 2054 } 2055 2056 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2057 const struct btrfs_dir_item *item, 2058 struct btrfs_key *key) 2059 { 2060 struct btrfs_disk_key disk_key; 2061 btrfs_dir_item_key(eb, item, &disk_key); 2062 btrfs_disk_key_to_cpu(key, &disk_key); 2063 } 2064 2065 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2066 { 2067 return key->type; 2068 } 2069 2070 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2071 { 2072 key->type = val; 2073 } 2074 2075 /* struct btrfs_header */ 2076 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2077 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2078 generation, 64); 2079 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2080 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2081 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2082 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2083 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2084 generation, 64); 2085 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2086 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2087 nritems, 32); 2088 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2089 2090 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2091 { 2092 return (btrfs_header_flags(eb) & flag) == flag; 2093 } 2094 2095 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2096 { 2097 u64 flags = btrfs_header_flags(eb); 2098 btrfs_set_header_flags(eb, flags | flag); 2099 } 2100 2101 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2102 { 2103 u64 flags = btrfs_header_flags(eb); 2104 btrfs_set_header_flags(eb, flags & ~flag); 2105 } 2106 2107 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2108 { 2109 u64 flags = btrfs_header_flags(eb); 2110 return flags >> BTRFS_BACKREF_REV_SHIFT; 2111 } 2112 2113 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2114 int rev) 2115 { 2116 u64 flags = btrfs_header_flags(eb); 2117 flags &= ~BTRFS_BACKREF_REV_MASK; 2118 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2119 btrfs_set_header_flags(eb, flags); 2120 } 2121 2122 static inline unsigned long btrfs_header_fsid(void) 2123 { 2124 return offsetof(struct btrfs_header, fsid); 2125 } 2126 2127 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2128 { 2129 return offsetof(struct btrfs_header, chunk_tree_uuid); 2130 } 2131 2132 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2133 { 2134 return btrfs_header_level(eb) == 0; 2135 } 2136 2137 /* struct btrfs_root_item */ 2138 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2139 generation, 64); 2140 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2141 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2142 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2143 2144 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2145 generation, 64); 2146 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2147 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2148 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2149 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2150 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2151 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2152 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2153 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2154 last_snapshot, 64); 2155 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2156 generation_v2, 64); 2157 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2158 ctransid, 64); 2159 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2160 otransid, 64); 2161 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2162 stransid, 64); 2163 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2164 rtransid, 64); 2165 2166 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2167 { 2168 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2169 } 2170 2171 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2172 { 2173 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2174 } 2175 2176 /* struct btrfs_root_backup */ 2177 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2178 tree_root, 64); 2179 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2180 tree_root_gen, 64); 2181 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2182 tree_root_level, 8); 2183 2184 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2185 chunk_root, 64); 2186 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2187 chunk_root_gen, 64); 2188 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2189 chunk_root_level, 8); 2190 2191 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2192 extent_root, 64); 2193 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2194 extent_root_gen, 64); 2195 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2196 extent_root_level, 8); 2197 2198 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2199 fs_root, 64); 2200 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2201 fs_root_gen, 64); 2202 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2203 fs_root_level, 8); 2204 2205 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2206 dev_root, 64); 2207 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2208 dev_root_gen, 64); 2209 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2210 dev_root_level, 8); 2211 2212 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2213 csum_root, 64); 2214 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2215 csum_root_gen, 64); 2216 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2217 csum_root_level, 8); 2218 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2219 total_bytes, 64); 2220 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2221 bytes_used, 64); 2222 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2223 num_devices, 64); 2224 2225 /* struct btrfs_balance_item */ 2226 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2227 2228 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2229 const struct btrfs_balance_item *bi, 2230 struct btrfs_disk_balance_args *ba) 2231 { 2232 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2233 } 2234 2235 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2236 struct btrfs_balance_item *bi, 2237 const struct btrfs_disk_balance_args *ba) 2238 { 2239 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2240 } 2241 2242 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2243 const struct btrfs_balance_item *bi, 2244 struct btrfs_disk_balance_args *ba) 2245 { 2246 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2247 } 2248 2249 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2250 struct btrfs_balance_item *bi, 2251 const struct btrfs_disk_balance_args *ba) 2252 { 2253 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2254 } 2255 2256 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2257 const struct btrfs_balance_item *bi, 2258 struct btrfs_disk_balance_args *ba) 2259 { 2260 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2261 } 2262 2263 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2264 struct btrfs_balance_item *bi, 2265 const struct btrfs_disk_balance_args *ba) 2266 { 2267 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2268 } 2269 2270 static inline void 2271 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2272 const struct btrfs_disk_balance_args *disk) 2273 { 2274 memset(cpu, 0, sizeof(*cpu)); 2275 2276 cpu->profiles = le64_to_cpu(disk->profiles); 2277 cpu->usage = le64_to_cpu(disk->usage); 2278 cpu->devid = le64_to_cpu(disk->devid); 2279 cpu->pstart = le64_to_cpu(disk->pstart); 2280 cpu->pend = le64_to_cpu(disk->pend); 2281 cpu->vstart = le64_to_cpu(disk->vstart); 2282 cpu->vend = le64_to_cpu(disk->vend); 2283 cpu->target = le64_to_cpu(disk->target); 2284 cpu->flags = le64_to_cpu(disk->flags); 2285 cpu->limit = le64_to_cpu(disk->limit); 2286 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2287 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2288 } 2289 2290 static inline void 2291 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2292 const struct btrfs_balance_args *cpu) 2293 { 2294 memset(disk, 0, sizeof(*disk)); 2295 2296 disk->profiles = cpu_to_le64(cpu->profiles); 2297 disk->usage = cpu_to_le64(cpu->usage); 2298 disk->devid = cpu_to_le64(cpu->devid); 2299 disk->pstart = cpu_to_le64(cpu->pstart); 2300 disk->pend = cpu_to_le64(cpu->pend); 2301 disk->vstart = cpu_to_le64(cpu->vstart); 2302 disk->vend = cpu_to_le64(cpu->vend); 2303 disk->target = cpu_to_le64(cpu->target); 2304 disk->flags = cpu_to_le64(cpu->flags); 2305 disk->limit = cpu_to_le64(cpu->limit); 2306 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2307 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2308 } 2309 2310 /* struct btrfs_super_block */ 2311 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2312 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2313 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2314 generation, 64); 2315 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2316 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2317 struct btrfs_super_block, sys_chunk_array_size, 32); 2318 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2319 struct btrfs_super_block, chunk_root_generation, 64); 2320 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2321 root_level, 8); 2322 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2323 chunk_root, 64); 2324 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2325 chunk_root_level, 8); 2326 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2327 log_root, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2329 log_root_transid, 64); 2330 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2331 log_root_level, 8); 2332 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2333 total_bytes, 64); 2334 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2335 bytes_used, 64); 2336 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2337 sectorsize, 32); 2338 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2339 nodesize, 32); 2340 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2341 stripesize, 32); 2342 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2343 root_dir_objectid, 64); 2344 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2345 num_devices, 64); 2346 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2347 compat_flags, 64); 2348 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2349 compat_ro_flags, 64); 2350 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2351 incompat_flags, 64); 2352 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2353 csum_type, 16); 2354 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2355 cache_generation, 64); 2356 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2357 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2358 uuid_tree_generation, 64); 2359 2360 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2361 { 2362 u16 t = btrfs_super_csum_type(s); 2363 /* 2364 * csum type is validated at mount time 2365 */ 2366 return btrfs_csum_sizes[t]; 2367 } 2368 2369 static inline const char *btrfs_super_csum_name(u16 csum_type) 2370 { 2371 /* csum type is validated at mount time */ 2372 return btrfs_csum_names[csum_type]; 2373 } 2374 2375 /* 2376 * The leaf data grows from end-to-front in the node. 2377 * this returns the address of the start of the last item, 2378 * which is the stop of the leaf data stack 2379 */ 2380 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2381 { 2382 u32 nr = btrfs_header_nritems(leaf); 2383 2384 if (nr == 0) 2385 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2386 return btrfs_item_offset_nr(leaf, nr - 1); 2387 } 2388 2389 /* struct btrfs_file_extent_item */ 2390 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2391 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2392 struct btrfs_file_extent_item, disk_bytenr, 64); 2393 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2394 struct btrfs_file_extent_item, offset, 64); 2395 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2396 struct btrfs_file_extent_item, generation, 64); 2397 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2398 struct btrfs_file_extent_item, num_bytes, 64); 2399 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2400 struct btrfs_file_extent_item, disk_num_bytes, 64); 2401 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2402 struct btrfs_file_extent_item, compression, 8); 2403 2404 static inline unsigned long 2405 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2406 { 2407 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2408 } 2409 2410 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2411 { 2412 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2413 } 2414 2415 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2416 disk_bytenr, 64); 2417 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2418 generation, 64); 2419 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2420 disk_num_bytes, 64); 2421 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2422 offset, 64); 2423 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2424 num_bytes, 64); 2425 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2426 ram_bytes, 64); 2427 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2428 compression, 8); 2429 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2430 encryption, 8); 2431 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2432 other_encoding, 16); 2433 2434 /* 2435 * this returns the number of bytes used by the item on disk, minus the 2436 * size of any extent headers. If a file is compressed on disk, this is 2437 * the compressed size 2438 */ 2439 static inline u32 btrfs_file_extent_inline_item_len( 2440 const struct extent_buffer *eb, 2441 struct btrfs_item *e) 2442 { 2443 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2444 } 2445 2446 /* btrfs_dev_stats_item */ 2447 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2448 const struct btrfs_dev_stats_item *ptr, 2449 int index) 2450 { 2451 u64 val; 2452 2453 read_extent_buffer(eb, &val, 2454 offsetof(struct btrfs_dev_stats_item, values) + 2455 ((unsigned long)ptr) + (index * sizeof(u64)), 2456 sizeof(val)); 2457 return val; 2458 } 2459 2460 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2461 struct btrfs_dev_stats_item *ptr, 2462 int index, u64 val) 2463 { 2464 write_extent_buffer(eb, &val, 2465 offsetof(struct btrfs_dev_stats_item, values) + 2466 ((unsigned long)ptr) + (index * sizeof(u64)), 2467 sizeof(val)); 2468 } 2469 2470 /* btrfs_qgroup_status_item */ 2471 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2472 generation, 64); 2473 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2474 version, 64); 2475 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2476 flags, 64); 2477 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2478 rescan, 64); 2479 2480 /* btrfs_qgroup_info_item */ 2481 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2482 generation, 64); 2483 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2484 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2485 rfer_cmpr, 64); 2486 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2487 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2488 excl_cmpr, 64); 2489 2490 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2491 struct btrfs_qgroup_info_item, generation, 64); 2492 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2493 rfer, 64); 2494 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2495 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2496 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2497 excl, 64); 2498 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2499 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2500 2501 /* btrfs_qgroup_limit_item */ 2502 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2503 flags, 64); 2504 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2505 max_rfer, 64); 2506 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2507 max_excl, 64); 2508 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2509 rsv_rfer, 64); 2510 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2511 rsv_excl, 64); 2512 2513 /* btrfs_dev_replace_item */ 2514 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2515 struct btrfs_dev_replace_item, src_devid, 64); 2516 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2517 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2518 64); 2519 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2520 replace_state, 64); 2521 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2522 time_started, 64); 2523 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2524 time_stopped, 64); 2525 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2526 num_write_errors, 64); 2527 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2528 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2529 64); 2530 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2531 cursor_left, 64); 2532 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2533 cursor_right, 64); 2534 2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2536 struct btrfs_dev_replace_item, src_devid, 64); 2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2538 struct btrfs_dev_replace_item, 2539 cont_reading_from_srcdev_mode, 64); 2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2541 struct btrfs_dev_replace_item, replace_state, 64); 2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2543 struct btrfs_dev_replace_item, time_started, 64); 2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2545 struct btrfs_dev_replace_item, time_stopped, 64); 2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2547 struct btrfs_dev_replace_item, num_write_errors, 64); 2548 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2549 struct btrfs_dev_replace_item, 2550 num_uncorrectable_read_errors, 64); 2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2552 struct btrfs_dev_replace_item, cursor_left, 64); 2553 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2554 struct btrfs_dev_replace_item, cursor_right, 64); 2555 2556 /* helper function to cast into the data area of the leaf. */ 2557 #define btrfs_item_ptr(leaf, slot, type) \ 2558 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2559 btrfs_item_offset_nr(leaf, slot))) 2560 2561 #define btrfs_item_ptr_offset(leaf, slot) \ 2562 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2563 btrfs_item_offset_nr(leaf, slot))) 2564 2565 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2566 { 2567 return crc32c(crc, address, length); 2568 } 2569 2570 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2571 { 2572 put_unaligned_le32(~crc, result); 2573 } 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 gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2590 { 2591 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2592 } 2593 2594 /* extent-tree.c */ 2595 2596 enum btrfs_inline_ref_type { 2597 BTRFS_REF_TYPE_INVALID, 2598 BTRFS_REF_TYPE_BLOCK, 2599 BTRFS_REF_TYPE_DATA, 2600 BTRFS_REF_TYPE_ANY, 2601 }; 2602 2603 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2604 struct btrfs_extent_inline_ref *iref, 2605 enum btrfs_inline_ref_type is_data); 2606 2607 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2608 2609 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2610 unsigned num_items) 2611 { 2612 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2613 } 2614 2615 /* 2616 * Doing a truncate won't result in new nodes or leaves, just what we need for 2617 * COW. 2618 */ 2619 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2620 unsigned num_items) 2621 { 2622 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2623 } 2624 2625 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2626 const u64 start); 2627 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2628 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2629 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2630 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2631 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2632 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2633 unsigned long count); 2634 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2635 struct btrfs_delayed_ref_root *delayed_refs, 2636 struct btrfs_delayed_ref_head *head); 2637 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2638 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2639 struct btrfs_fs_info *fs_info, u64 bytenr, 2640 u64 offset, int metadata, u64 *refs, u64 *flags); 2641 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2642 u64 bytenr, u64 num, int reserved); 2643 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2644 u64 bytenr, u64 num_bytes); 2645 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2646 int btrfs_cross_ref_exist(struct btrfs_root *root, 2647 u64 objectid, u64 offset, u64 bytenr); 2648 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2649 struct btrfs_fs_info *info, 2650 u64 bytenr); 2651 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2652 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2653 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2654 struct btrfs_root *root, 2655 u64 parent, u64 root_objectid, 2656 const struct btrfs_disk_key *key, 2657 int level, u64 hint, 2658 u64 empty_size); 2659 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2660 struct btrfs_root *root, 2661 struct extent_buffer *buf, 2662 u64 parent, int last_ref); 2663 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2664 struct btrfs_root *root, u64 owner, 2665 u64 offset, u64 ram_bytes, 2666 struct btrfs_key *ins); 2667 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2668 u64 root_objectid, u64 owner, u64 offset, 2669 struct btrfs_key *ins); 2670 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2671 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2672 struct btrfs_key *ins, int is_data, int delalloc); 2673 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2674 struct extent_buffer *buf, int full_backref); 2675 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2676 struct extent_buffer *buf, int full_backref); 2677 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2678 u64 bytenr, u64 num_bytes, u64 flags, 2679 int level, int is_data); 2680 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2681 2682 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2683 u64 start, u64 len, int delalloc); 2684 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2685 u64 start, u64 len); 2686 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2687 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2688 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2689 struct btrfs_ref *generic_ref); 2690 2691 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2692 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans); 2693 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans); 2694 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2695 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2696 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2697 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2698 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2699 u64 bytes_used, u64 type, u64 chunk_offset, 2700 u64 size); 2701 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2702 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2703 struct btrfs_fs_info *fs_info, 2704 const u64 chunk_offset); 2705 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2706 u64 group_start, struct extent_map *em); 2707 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2708 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2709 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2710 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2711 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2712 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2713 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2714 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2715 2716 enum btrfs_reserve_flush_enum { 2717 /* If we are in the transaction, we can't flush anything.*/ 2718 BTRFS_RESERVE_NO_FLUSH, 2719 /* 2720 * Flushing delalloc may cause deadlock somewhere, in this 2721 * case, use FLUSH LIMIT 2722 */ 2723 BTRFS_RESERVE_FLUSH_LIMIT, 2724 BTRFS_RESERVE_FLUSH_ALL, 2725 }; 2726 2727 enum btrfs_flush_state { 2728 FLUSH_DELAYED_ITEMS_NR = 1, 2729 FLUSH_DELAYED_ITEMS = 2, 2730 FLUSH_DELAYED_REFS_NR = 3, 2731 FLUSH_DELAYED_REFS = 4, 2732 FLUSH_DELALLOC = 5, 2733 FLUSH_DELALLOC_WAIT = 6, 2734 ALLOC_CHUNK = 7, 2735 ALLOC_CHUNK_FORCE = 8, 2736 COMMIT_TRANS = 9, 2737 }; 2738 2739 /* 2740 * control flags for do_chunk_alloc's force field 2741 * CHUNK_ALLOC_NO_FORCE means to only allocate a chunk 2742 * if we really need one. 2743 * 2744 * CHUNK_ALLOC_LIMITED means to only try and allocate one 2745 * if we have very few chunks already allocated. This is 2746 * used as part of the clustering code to help make sure 2747 * we have a good pool of storage to cluster in, without 2748 * filling the FS with empty chunks 2749 * 2750 * CHUNK_ALLOC_FORCE means it must try to allocate one 2751 * 2752 */ 2753 enum btrfs_chunk_alloc_enum { 2754 CHUNK_ALLOC_NO_FORCE, 2755 CHUNK_ALLOC_LIMITED, 2756 CHUNK_ALLOC_FORCE, 2757 }; 2758 2759 int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags, 2760 enum btrfs_chunk_alloc_enum force); 2761 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2762 struct btrfs_block_rsv *rsv, 2763 int nitems, bool use_global_rsv); 2764 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2765 struct btrfs_block_rsv *rsv); 2766 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2767 bool qgroup_free); 2768 2769 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2770 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); 2771 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2772 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2773 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2774 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2775 u64 start, u64 end); 2776 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2777 u64 num_bytes, u64 *actual_bytes); 2778 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); 2779 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2780 2781 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2782 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2783 struct btrfs_fs_info *fs_info); 2784 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2785 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2786 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2787 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); 2788 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2789 u64 start, u64 end); 2790 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); 2791 2792 /* ctree.c */ 2793 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2794 int level, int *slot); 2795 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2796 int btrfs_previous_item(struct btrfs_root *root, 2797 struct btrfs_path *path, u64 min_objectid, 2798 int type); 2799 int btrfs_previous_extent_item(struct btrfs_root *root, 2800 struct btrfs_path *path, u64 min_objectid); 2801 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2802 struct btrfs_path *path, 2803 const struct btrfs_key *new_key); 2804 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2805 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2806 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2807 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2808 struct btrfs_key *key, int lowest_level, 2809 u64 min_trans); 2810 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2811 struct btrfs_path *path, 2812 u64 min_trans); 2813 enum btrfs_compare_tree_result { 2814 BTRFS_COMPARE_TREE_NEW, 2815 BTRFS_COMPARE_TREE_DELETED, 2816 BTRFS_COMPARE_TREE_CHANGED, 2817 BTRFS_COMPARE_TREE_SAME, 2818 }; 2819 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2820 struct btrfs_path *right_path, 2821 struct btrfs_key *key, 2822 enum btrfs_compare_tree_result result, 2823 void *ctx); 2824 int btrfs_compare_trees(struct btrfs_root *left_root, 2825 struct btrfs_root *right_root, 2826 btrfs_changed_cb_t cb, void *ctx); 2827 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2828 struct btrfs_root *root, struct extent_buffer *buf, 2829 struct extent_buffer *parent, int parent_slot, 2830 struct extent_buffer **cow_ret); 2831 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2832 struct btrfs_root *root, 2833 struct extent_buffer *buf, 2834 struct extent_buffer **cow_ret, u64 new_root_objectid); 2835 int btrfs_block_can_be_shared(struct btrfs_root *root, 2836 struct extent_buffer *buf); 2837 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2838 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2839 int btrfs_split_item(struct btrfs_trans_handle *trans, 2840 struct btrfs_root *root, 2841 struct btrfs_path *path, 2842 const struct btrfs_key *new_key, 2843 unsigned long split_offset); 2844 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2845 struct btrfs_root *root, 2846 struct btrfs_path *path, 2847 const struct btrfs_key *new_key); 2848 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2849 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2850 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2851 const struct btrfs_key *key, struct btrfs_path *p, 2852 int ins_len, int cow); 2853 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2854 struct btrfs_path *p, u64 time_seq); 2855 int btrfs_search_slot_for_read(struct btrfs_root *root, 2856 const struct btrfs_key *key, 2857 struct btrfs_path *p, int find_higher, 2858 int return_any); 2859 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2860 struct btrfs_root *root, struct extent_buffer *parent, 2861 int start_slot, u64 *last_ret, 2862 struct btrfs_key *progress); 2863 void btrfs_release_path(struct btrfs_path *p); 2864 struct btrfs_path *btrfs_alloc_path(void); 2865 void btrfs_free_path(struct btrfs_path *p); 2866 void btrfs_set_path_blocking(struct btrfs_path *p); 2867 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2868 2869 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2870 struct btrfs_path *path, int slot, int nr); 2871 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2872 struct btrfs_root *root, 2873 struct btrfs_path *path) 2874 { 2875 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2876 } 2877 2878 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2879 const struct btrfs_key *cpu_key, u32 *data_size, 2880 u32 total_data, u32 total_size, int nr); 2881 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2882 const struct btrfs_key *key, void *data, u32 data_size); 2883 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2884 struct btrfs_root *root, 2885 struct btrfs_path *path, 2886 const struct btrfs_key *cpu_key, u32 *data_size, 2887 int nr); 2888 2889 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2890 struct btrfs_root *root, 2891 struct btrfs_path *path, 2892 const struct btrfs_key *key, 2893 u32 data_size) 2894 { 2895 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2896 } 2897 2898 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2899 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2900 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2901 u64 time_seq); 2902 static inline int btrfs_next_old_item(struct btrfs_root *root, 2903 struct btrfs_path *p, u64 time_seq) 2904 { 2905 ++p->slots[0]; 2906 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2907 return btrfs_next_old_leaf(root, p, time_seq); 2908 return 0; 2909 } 2910 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2911 { 2912 return btrfs_next_old_item(root, p, 0); 2913 } 2914 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2915 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2916 struct btrfs_block_rsv *block_rsv, 2917 int update_ref, int for_reloc); 2918 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2919 struct btrfs_root *root, 2920 struct extent_buffer *node, 2921 struct extent_buffer *parent); 2922 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2923 { 2924 /* 2925 * Do it this way so we only ever do one test_bit in the normal case. 2926 */ 2927 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2928 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2929 return 2; 2930 return 1; 2931 } 2932 return 0; 2933 } 2934 2935 /* 2936 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2937 * anything except sleeping. This function is used to check the status of 2938 * the fs. 2939 */ 2940 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2941 { 2942 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2943 } 2944 2945 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2946 { 2947 kfree(fs_info->balance_ctl); 2948 kfree(fs_info->delayed_root); 2949 kfree(fs_info->extent_root); 2950 kfree(fs_info->tree_root); 2951 kfree(fs_info->chunk_root); 2952 kfree(fs_info->dev_root); 2953 kfree(fs_info->csum_root); 2954 kfree(fs_info->quota_root); 2955 kfree(fs_info->uuid_root); 2956 kfree(fs_info->free_space_root); 2957 kfree(fs_info->super_copy); 2958 kfree(fs_info->super_for_commit); 2959 kvfree(fs_info); 2960 } 2961 2962 /* tree mod log functions from ctree.c */ 2963 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2964 struct seq_list *elem); 2965 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2966 struct seq_list *elem); 2967 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2968 2969 /* root-item.c */ 2970 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2971 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2972 int name_len); 2973 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2974 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2975 int name_len); 2976 int btrfs_del_root(struct btrfs_trans_handle *trans, 2977 const struct btrfs_key *key); 2978 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2979 const struct btrfs_key *key, 2980 struct btrfs_root_item *item); 2981 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2982 struct btrfs_root *root, 2983 struct btrfs_key *key, 2984 struct btrfs_root_item *item); 2985 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2986 struct btrfs_path *path, struct btrfs_root_item *root_item, 2987 struct btrfs_key *root_key); 2988 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2989 void btrfs_set_root_node(struct btrfs_root_item *item, 2990 struct extent_buffer *node); 2991 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2992 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2993 struct btrfs_root *root); 2994 2995 /* uuid-tree.c */ 2996 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2997 u64 subid); 2998 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2999 u64 subid); 3000 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3001 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3002 u64)); 3003 3004 /* dir-item.c */ 3005 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3006 const char *name, int name_len); 3007 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 3008 int name_len, struct btrfs_inode *dir, 3009 struct btrfs_key *location, u8 type, u64 index); 3010 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3011 struct btrfs_root *root, 3012 struct btrfs_path *path, u64 dir, 3013 const char *name, int name_len, 3014 int mod); 3015 struct btrfs_dir_item * 3016 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3017 struct btrfs_root *root, 3018 struct btrfs_path *path, u64 dir, 3019 u64 objectid, const char *name, int name_len, 3020 int mod); 3021 struct btrfs_dir_item * 3022 btrfs_search_dir_index_item(struct btrfs_root *root, 3023 struct btrfs_path *path, u64 dirid, 3024 const char *name, int name_len); 3025 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3026 struct btrfs_root *root, 3027 struct btrfs_path *path, 3028 struct btrfs_dir_item *di); 3029 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3030 struct btrfs_root *root, 3031 struct btrfs_path *path, u64 objectid, 3032 const char *name, u16 name_len, 3033 const void *data, u16 data_len); 3034 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3035 struct btrfs_root *root, 3036 struct btrfs_path *path, u64 dir, 3037 const char *name, u16 name_len, 3038 int mod); 3039 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3040 struct btrfs_path *path, 3041 const char *name, 3042 int name_len); 3043 3044 /* orphan.c */ 3045 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3046 struct btrfs_root *root, u64 offset); 3047 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3048 struct btrfs_root *root, u64 offset); 3049 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3050 3051 /* inode-item.c */ 3052 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3053 struct btrfs_root *root, 3054 const char *name, int name_len, 3055 u64 inode_objectid, u64 ref_objectid, u64 index); 3056 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3057 struct btrfs_root *root, 3058 const char *name, int name_len, 3059 u64 inode_objectid, u64 ref_objectid, u64 *index); 3060 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3061 struct btrfs_root *root, 3062 struct btrfs_path *path, u64 objectid); 3063 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3064 *root, struct btrfs_path *path, 3065 struct btrfs_key *location, int mod); 3066 3067 struct btrfs_inode_extref * 3068 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3069 struct btrfs_root *root, 3070 struct btrfs_path *path, 3071 const char *name, int name_len, 3072 u64 inode_objectid, u64 ref_objectid, int ins_len, 3073 int cow); 3074 3075 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3076 const char *name, 3077 int name_len, struct btrfs_inode_ref **ref_ret); 3078 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3079 u64 ref_objectid, const char *name, 3080 int name_len, 3081 struct btrfs_inode_extref **extref_ret); 3082 3083 /* file-item.c */ 3084 struct btrfs_dio_private; 3085 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3086 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3087 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 3088 u8 *dst); 3089 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3090 u64 logical_offset); 3091 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3092 struct btrfs_root *root, 3093 u64 objectid, u64 pos, 3094 u64 disk_offset, u64 disk_num_bytes, 3095 u64 num_bytes, u64 offset, u64 ram_bytes, 3096 u8 compression, u8 encryption, u16 other_encoding); 3097 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3098 struct btrfs_root *root, 3099 struct btrfs_path *path, u64 objectid, 3100 u64 bytenr, int mod); 3101 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3102 struct btrfs_root *root, 3103 struct btrfs_ordered_sum *sums); 3104 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3105 u64 file_start, int contig); 3106 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3107 struct list_head *list, int search_commit); 3108 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3109 const struct btrfs_path *path, 3110 struct btrfs_file_extent_item *fi, 3111 const bool new_inline, 3112 struct extent_map *em); 3113 3114 /* inode.c */ 3115 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3116 u64 start, u64 len); 3117 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3118 u64 *orig_start, u64 *orig_block_len, 3119 u64 *ram_bytes); 3120 3121 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3122 struct btrfs_inode *inode); 3123 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3124 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3125 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3126 struct btrfs_root *root, 3127 struct btrfs_inode *dir, struct btrfs_inode *inode, 3128 const char *name, int name_len); 3129 int btrfs_add_link(struct btrfs_trans_handle *trans, 3130 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3131 const char *name, int name_len, int add_backref, u64 index); 3132 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3133 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3134 int front); 3135 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3136 struct btrfs_root *root, 3137 struct inode *inode, u64 new_size, 3138 u32 min_type); 3139 3140 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3141 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3142 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3143 unsigned int extra_bits, 3144 struct extent_state **cached_state, int dedupe); 3145 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3146 struct btrfs_root *new_root, 3147 struct btrfs_root *parent_root, 3148 u64 new_dirid); 3149 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3150 unsigned *bits); 3151 void btrfs_clear_delalloc_extent(struct inode *inode, 3152 struct extent_state *state, unsigned *bits); 3153 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3154 struct extent_state *other); 3155 void btrfs_split_delalloc_extent(struct inode *inode, 3156 struct extent_state *orig, u64 split); 3157 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3158 unsigned long bio_flags); 3159 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3160 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3161 int btrfs_readpage(struct file *file, struct page *page); 3162 void btrfs_evict_inode(struct inode *inode); 3163 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3164 struct inode *btrfs_alloc_inode(struct super_block *sb); 3165 void btrfs_destroy_inode(struct inode *inode); 3166 void btrfs_free_inode(struct inode *inode); 3167 int btrfs_drop_inode(struct inode *inode); 3168 int __init btrfs_init_cachep(void); 3169 void __cold btrfs_destroy_cachep(void); 3170 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 3171 struct btrfs_root *root, int *new, 3172 struct btrfs_path *path); 3173 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3174 struct btrfs_root *root, int *was_new); 3175 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3176 struct page *page, size_t pg_offset, 3177 u64 start, u64 end, int create); 3178 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3179 struct btrfs_root *root, 3180 struct inode *inode); 3181 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3182 struct btrfs_root *root, struct inode *inode); 3183 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3184 struct btrfs_inode *inode); 3185 int btrfs_orphan_cleanup(struct btrfs_root *root); 3186 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3187 void btrfs_add_delayed_iput(struct inode *inode); 3188 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3189 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3190 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3191 u64 start, u64 num_bytes, u64 min_size, 3192 loff_t actual_len, u64 *alloc_hint); 3193 int btrfs_prealloc_file_range_trans(struct inode *inode, 3194 struct btrfs_trans_handle *trans, int mode, 3195 u64 start, u64 num_bytes, u64 min_size, 3196 loff_t actual_len, u64 *alloc_hint); 3197 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 3198 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3199 struct writeback_control *wbc); 3200 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3201 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3202 u64 end, int uptodate); 3203 extern const struct dentry_operations btrfs_dentry_operations; 3204 3205 /* ioctl.c */ 3206 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3207 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3208 int btrfs_ioctl_get_supported_features(void __user *arg); 3209 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3210 int btrfs_is_empty_uuid(u8 *uuid); 3211 int btrfs_defrag_file(struct inode *inode, struct file *file, 3212 struct btrfs_ioctl_defrag_range_args *range, 3213 u64 newer_than, unsigned long max_pages); 3214 void btrfs_get_block_group_info(struct list_head *groups_list, 3215 struct btrfs_ioctl_space_info *space); 3216 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3217 struct btrfs_ioctl_balance_args *bargs); 3218 3219 /* file.c */ 3220 int __init btrfs_auto_defrag_init(void); 3221 void __cold btrfs_auto_defrag_exit(void); 3222 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3223 struct btrfs_inode *inode); 3224 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3225 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3226 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3227 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3228 int skip_pinned); 3229 extern const struct file_operations btrfs_file_operations; 3230 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3231 struct btrfs_root *root, struct inode *inode, 3232 struct btrfs_path *path, u64 start, u64 end, 3233 u64 *drop_end, int drop_cache, 3234 int replace_extent, 3235 u32 extent_item_size, 3236 int *key_inserted); 3237 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3238 struct btrfs_root *root, struct inode *inode, u64 start, 3239 u64 end, int drop_cache); 3240 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3241 struct btrfs_inode *inode, u64 start, u64 end); 3242 int btrfs_release_file(struct inode *inode, struct file *file); 3243 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3244 size_t num_pages, loff_t pos, size_t write_bytes, 3245 struct extent_state **cached); 3246 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3247 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 3248 struct file *file_out, loff_t pos_out, 3249 loff_t len, unsigned int remap_flags); 3250 3251 /* tree-defrag.c */ 3252 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3253 struct btrfs_root *root); 3254 3255 /* sysfs.c */ 3256 int __init btrfs_init_sysfs(void); 3257 void __cold btrfs_exit_sysfs(void); 3258 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3259 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3260 3261 /* super.c */ 3262 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3263 unsigned long new_flags); 3264 int btrfs_sync_fs(struct super_block *sb, int wait); 3265 3266 static inline __printf(2, 3) __cold 3267 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3268 { 3269 } 3270 3271 #ifdef CONFIG_PRINTK 3272 __printf(2, 3) 3273 __cold 3274 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3275 #else 3276 #define btrfs_printk(fs_info, fmt, args...) \ 3277 btrfs_no_printk(fs_info, fmt, ##args) 3278 #endif 3279 3280 #define btrfs_emerg(fs_info, fmt, args...) \ 3281 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3282 #define btrfs_alert(fs_info, fmt, args...) \ 3283 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3284 #define btrfs_crit(fs_info, fmt, args...) \ 3285 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3286 #define btrfs_err(fs_info, fmt, args...) \ 3287 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3288 #define btrfs_warn(fs_info, fmt, args...) \ 3289 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3290 #define btrfs_notice(fs_info, fmt, args...) \ 3291 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3292 #define btrfs_info(fs_info, fmt, args...) \ 3293 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3294 3295 /* 3296 * Wrappers that use printk_in_rcu 3297 */ 3298 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3299 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3300 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3301 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3302 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3303 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3304 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3305 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3306 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3307 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3308 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3309 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3310 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3311 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3312 3313 /* 3314 * Wrappers that use a ratelimited printk_in_rcu 3315 */ 3316 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3317 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3318 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3319 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3320 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3321 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3322 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3323 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3324 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3326 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3327 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3328 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3329 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3330 3331 /* 3332 * Wrappers that use a ratelimited printk 3333 */ 3334 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3335 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3336 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3337 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3338 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3339 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3340 #define btrfs_err_rl(fs_info, fmt, args...) \ 3341 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3342 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3343 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3344 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3345 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3346 #define btrfs_info_rl(fs_info, fmt, args...) \ 3347 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3348 3349 #if defined(CONFIG_DYNAMIC_DEBUG) 3350 #define btrfs_debug(fs_info, fmt, args...) \ 3351 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3352 fs_info, KERN_DEBUG fmt, ##args) 3353 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3354 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3355 fs_info, KERN_DEBUG fmt, ##args) 3356 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3357 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3358 fs_info, KERN_DEBUG fmt, ##args) 3359 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3360 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3361 fs_info, KERN_DEBUG fmt, ##args) 3362 #elif defined(DEBUG) 3363 #define btrfs_debug(fs_info, fmt, args...) \ 3364 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3365 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3366 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3367 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3368 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3369 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3370 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3371 #else 3372 #define btrfs_debug(fs_info, fmt, args...) \ 3373 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3374 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3375 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3376 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3377 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3378 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3379 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3380 #endif 3381 3382 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3383 do { \ 3384 rcu_read_lock(); \ 3385 btrfs_printk(fs_info, fmt, ##args); \ 3386 rcu_read_unlock(); \ 3387 } while (0) 3388 3389 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3390 do { \ 3391 rcu_read_lock(); \ 3392 btrfs_no_printk(fs_info, fmt, ##args); \ 3393 rcu_read_unlock(); \ 3394 } while (0) 3395 3396 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3397 do { \ 3398 static DEFINE_RATELIMIT_STATE(_rs, \ 3399 DEFAULT_RATELIMIT_INTERVAL, \ 3400 DEFAULT_RATELIMIT_BURST); \ 3401 if (__ratelimit(&_rs)) \ 3402 btrfs_printk(fs_info, fmt, ##args); \ 3403 } while (0) 3404 3405 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3406 do { \ 3407 rcu_read_lock(); \ 3408 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3409 rcu_read_unlock(); \ 3410 } while (0) 3411 3412 __cold 3413 static inline void assfail(const char *expr, const char *file, int line) 3414 { 3415 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { 3416 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3417 BUG(); 3418 } 3419 } 3420 3421 #define ASSERT(expr) \ 3422 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3423 3424 /* 3425 * Use that for functions that are conditionally exported for sanity tests but 3426 * otherwise static 3427 */ 3428 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3429 #define EXPORT_FOR_TESTS static 3430 #else 3431 #define EXPORT_FOR_TESTS 3432 #endif 3433 3434 __cold 3435 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3436 { 3437 btrfs_err(fs_info, 3438 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3439 } 3440 3441 __printf(5, 6) 3442 __cold 3443 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3444 unsigned int line, int errno, const char *fmt, ...); 3445 3446 const char *btrfs_decode_error(int errno); 3447 3448 __cold 3449 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3450 const char *function, 3451 unsigned int line, int errno); 3452 3453 /* 3454 * Call btrfs_abort_transaction as early as possible when an error condition is 3455 * detected, that way the exact line number is reported. 3456 */ 3457 #define btrfs_abort_transaction(trans, errno) \ 3458 do { \ 3459 /* Report first abort since mount */ \ 3460 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3461 &((trans)->fs_info->fs_state))) { \ 3462 if ((errno) != -EIO) { \ 3463 WARN(1, KERN_DEBUG \ 3464 "BTRFS: Transaction aborted (error %d)\n", \ 3465 (errno)); \ 3466 } else { \ 3467 btrfs_debug((trans)->fs_info, \ 3468 "Transaction aborted (error %d)", \ 3469 (errno)); \ 3470 } \ 3471 } \ 3472 __btrfs_abort_transaction((trans), __func__, \ 3473 __LINE__, (errno)); \ 3474 } while (0) 3475 3476 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3477 do { \ 3478 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3479 (errno), fmt, ##args); \ 3480 } while (0) 3481 3482 __printf(5, 6) 3483 __cold 3484 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3485 unsigned int line, int errno, const char *fmt, ...); 3486 /* 3487 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3488 * will panic(). Otherwise we BUG() here. 3489 */ 3490 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3491 do { \ 3492 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3493 BUG(); \ 3494 } while (0) 3495 3496 3497 /* compatibility and incompatibility defines */ 3498 3499 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3500 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3501 #opt) 3502 3503 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3504 u64 flag, const char* name) 3505 { 3506 struct btrfs_super_block *disk_super; 3507 u64 features; 3508 3509 disk_super = fs_info->super_copy; 3510 features = btrfs_super_incompat_flags(disk_super); 3511 if (!(features & flag)) { 3512 spin_lock(&fs_info->super_lock); 3513 features = btrfs_super_incompat_flags(disk_super); 3514 if (!(features & flag)) { 3515 features |= flag; 3516 btrfs_set_super_incompat_flags(disk_super, features); 3517 btrfs_info(fs_info, 3518 "setting incompat feature flag for %s (0x%llx)", 3519 name, flag); 3520 } 3521 spin_unlock(&fs_info->super_lock); 3522 } 3523 } 3524 3525 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3526 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3527 #opt) 3528 3529 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3530 u64 flag, const char* name) 3531 { 3532 struct btrfs_super_block *disk_super; 3533 u64 features; 3534 3535 disk_super = fs_info->super_copy; 3536 features = btrfs_super_incompat_flags(disk_super); 3537 if (features & flag) { 3538 spin_lock(&fs_info->super_lock); 3539 features = btrfs_super_incompat_flags(disk_super); 3540 if (features & flag) { 3541 features &= ~flag; 3542 btrfs_set_super_incompat_flags(disk_super, features); 3543 btrfs_info(fs_info, 3544 "clearing incompat feature flag for %s (0x%llx)", 3545 name, flag); 3546 } 3547 spin_unlock(&fs_info->super_lock); 3548 } 3549 } 3550 3551 #define btrfs_fs_incompat(fs_info, opt) \ 3552 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3553 3554 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3555 { 3556 struct btrfs_super_block *disk_super; 3557 disk_super = fs_info->super_copy; 3558 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3559 } 3560 3561 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3562 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3563 #opt) 3564 3565 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3566 u64 flag, const char *name) 3567 { 3568 struct btrfs_super_block *disk_super; 3569 u64 features; 3570 3571 disk_super = fs_info->super_copy; 3572 features = btrfs_super_compat_ro_flags(disk_super); 3573 if (!(features & flag)) { 3574 spin_lock(&fs_info->super_lock); 3575 features = btrfs_super_compat_ro_flags(disk_super); 3576 if (!(features & flag)) { 3577 features |= flag; 3578 btrfs_set_super_compat_ro_flags(disk_super, features); 3579 btrfs_info(fs_info, 3580 "setting compat-ro feature flag for %s (0x%llx)", 3581 name, flag); 3582 } 3583 spin_unlock(&fs_info->super_lock); 3584 } 3585 } 3586 3587 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3588 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3589 #opt) 3590 3591 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3592 u64 flag, const char *name) 3593 { 3594 struct btrfs_super_block *disk_super; 3595 u64 features; 3596 3597 disk_super = fs_info->super_copy; 3598 features = btrfs_super_compat_ro_flags(disk_super); 3599 if (features & flag) { 3600 spin_lock(&fs_info->super_lock); 3601 features = btrfs_super_compat_ro_flags(disk_super); 3602 if (features & flag) { 3603 features &= ~flag; 3604 btrfs_set_super_compat_ro_flags(disk_super, features); 3605 btrfs_info(fs_info, 3606 "clearing compat-ro feature flag for %s (0x%llx)", 3607 name, flag); 3608 } 3609 spin_unlock(&fs_info->super_lock); 3610 } 3611 } 3612 3613 #define btrfs_fs_compat_ro(fs_info, opt) \ 3614 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3615 3616 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3617 { 3618 struct btrfs_super_block *disk_super; 3619 disk_super = fs_info->super_copy; 3620 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3621 } 3622 3623 /* acl.c */ 3624 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3625 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3626 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3627 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3628 struct inode *inode, struct inode *dir); 3629 #else 3630 #define btrfs_get_acl NULL 3631 #define btrfs_set_acl NULL 3632 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3633 struct inode *inode, struct inode *dir) 3634 { 3635 return 0; 3636 } 3637 #endif 3638 3639 /* relocation.c */ 3640 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3641 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3642 struct btrfs_root *root); 3643 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3644 struct btrfs_root *root); 3645 int btrfs_recover_relocation(struct btrfs_root *root); 3646 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3647 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3648 struct btrfs_root *root, struct extent_buffer *buf, 3649 struct extent_buffer *cow); 3650 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3651 u64 *bytes_to_reserve); 3652 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3653 struct btrfs_pending_snapshot *pending); 3654 3655 /* scrub.c */ 3656 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3657 u64 end, struct btrfs_scrub_progress *progress, 3658 int readonly, int is_dev_replace); 3659 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3660 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3661 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3662 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3663 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3664 struct btrfs_scrub_progress *progress); 3665 static inline void btrfs_init_full_stripe_locks_tree( 3666 struct btrfs_full_stripe_locks_tree *locks_root) 3667 { 3668 locks_root->root = RB_ROOT; 3669 mutex_init(&locks_root->lock); 3670 } 3671 3672 /* dev-replace.c */ 3673 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3674 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3675 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3676 3677 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3678 { 3679 btrfs_bio_counter_sub(fs_info, 1); 3680 } 3681 3682 /* reada.c */ 3683 struct reada_control { 3684 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3685 struct btrfs_key key_start; 3686 struct btrfs_key key_end; /* exclusive */ 3687 atomic_t elems; 3688 struct kref refcnt; 3689 wait_queue_head_t wait; 3690 }; 3691 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3692 struct btrfs_key *start, struct btrfs_key *end); 3693 int btrfs_reada_wait(void *handle); 3694 void btrfs_reada_detach(void *handle); 3695 int btree_readahead_hook(struct extent_buffer *eb, int err); 3696 3697 static inline int is_fstree(u64 rootid) 3698 { 3699 if (rootid == BTRFS_FS_TREE_OBJECTID || 3700 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3701 !btrfs_qgroup_level(rootid))) 3702 return 1; 3703 return 0; 3704 } 3705 3706 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3707 { 3708 return signal_pending(current); 3709 } 3710 3711 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3712 3713 /* Sanity test specific functions */ 3714 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3715 void btrfs_test_inode_set_ops(struct inode *inode); 3716 void btrfs_test_destroy_inode(struct inode *inode); 3717 3718 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3719 { 3720 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3721 } 3722 #else 3723 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3724 { 3725 return 0; 3726 } 3727 #endif 3728 3729 static inline void cond_wake_up(struct wait_queue_head *wq) 3730 { 3731 /* 3732 * This implies a full smp_mb barrier, see comments for 3733 * waitqueue_active why. 3734 */ 3735 if (wq_has_sleeper(wq)) 3736 wake_up(wq); 3737 } 3738 3739 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3740 { 3741 /* 3742 * Special case for conditional wakeup where the barrier required for 3743 * waitqueue_active is implied by some of the preceding code. Eg. one 3744 * of such atomic operations (atomic_dec_and_return, ...), or a 3745 * unlock/lock sequence, etc. 3746 */ 3747 if (waitqueue_active(wq)) 3748 wake_up(wq); 3749 } 3750 3751 #endif 3752