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 }; 405 406 /* 407 * free clusters are used to claim free space in relatively large chunks, 408 * allowing us to do less seeky writes. They are used for all metadata 409 * allocations. In ssd_spread mode they are also used for data allocations. 410 */ 411 struct btrfs_free_cluster { 412 spinlock_t lock; 413 spinlock_t refill_lock; 414 struct rb_root root; 415 416 /* largest extent in this cluster */ 417 u64 max_size; 418 419 /* first extent starting offset */ 420 u64 window_start; 421 422 /* We did a full search and couldn't create a cluster */ 423 bool fragmented; 424 425 struct btrfs_block_group_cache *block_group; 426 /* 427 * when a cluster is allocated from a block group, we put the 428 * cluster onto a list in the block group so that it can 429 * be freed before the block group is freed. 430 */ 431 struct list_head block_group_list; 432 }; 433 434 enum btrfs_caching_type { 435 BTRFS_CACHE_NO, 436 BTRFS_CACHE_STARTED, 437 BTRFS_CACHE_FAST, 438 BTRFS_CACHE_FINISHED, 439 BTRFS_CACHE_ERROR, 440 }; 441 442 enum btrfs_disk_cache_state { 443 BTRFS_DC_WRITTEN, 444 BTRFS_DC_ERROR, 445 BTRFS_DC_CLEAR, 446 BTRFS_DC_SETUP, 447 }; 448 449 struct btrfs_caching_control { 450 struct list_head list; 451 struct mutex mutex; 452 wait_queue_head_t wait; 453 struct btrfs_work work; 454 struct btrfs_block_group_cache *block_group; 455 u64 progress; 456 refcount_t count; 457 }; 458 459 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 460 #define CACHING_CTL_WAKE_UP SZ_2M 461 462 struct btrfs_io_ctl { 463 void *cur, *orig; 464 struct page *page; 465 struct page **pages; 466 struct btrfs_fs_info *fs_info; 467 struct inode *inode; 468 unsigned long size; 469 int index; 470 int num_pages; 471 int entries; 472 int bitmaps; 473 unsigned check_crcs:1; 474 }; 475 476 /* 477 * Tree to record all locked full stripes of a RAID5/6 block group 478 */ 479 struct btrfs_full_stripe_locks_tree { 480 struct rb_root root; 481 struct mutex lock; 482 }; 483 484 struct btrfs_block_group_cache { 485 struct btrfs_key key; 486 struct btrfs_block_group_item item; 487 struct btrfs_fs_info *fs_info; 488 struct inode *inode; 489 spinlock_t lock; 490 u64 pinned; 491 u64 reserved; 492 u64 delalloc_bytes; 493 u64 bytes_super; 494 u64 flags; 495 u64 cache_generation; 496 497 /* 498 * If the free space extent count exceeds this number, convert the block 499 * group to bitmaps. 500 */ 501 u32 bitmap_high_thresh; 502 503 /* 504 * If the free space extent count drops below this number, convert the 505 * block group back to extents. 506 */ 507 u32 bitmap_low_thresh; 508 509 /* 510 * It is just used for the delayed data space allocation because 511 * only the data space allocation and the relative metadata update 512 * can be done cross the transaction. 513 */ 514 struct rw_semaphore data_rwsem; 515 516 /* for raid56, this is a full stripe, without parity */ 517 unsigned long full_stripe_len; 518 519 unsigned int ro; 520 unsigned int iref:1; 521 unsigned int has_caching_ctl:1; 522 unsigned int removed:1; 523 524 int disk_cache_state; 525 526 /* cache tracking stuff */ 527 int cached; 528 struct btrfs_caching_control *caching_ctl; 529 u64 last_byte_to_unpin; 530 531 struct btrfs_space_info *space_info; 532 533 /* free space cache stuff */ 534 struct btrfs_free_space_ctl *free_space_ctl; 535 536 /* block group cache stuff */ 537 struct rb_node cache_node; 538 539 /* for block groups in the same raid type */ 540 struct list_head list; 541 542 /* usage count */ 543 atomic_t count; 544 545 /* List of struct btrfs_free_clusters for this block group. 546 * Today it will only have one thing on it, but that may change 547 */ 548 struct list_head cluster_list; 549 550 /* For delayed block group creation or deletion of empty block groups */ 551 struct list_head bg_list; 552 553 /* For read-only block groups */ 554 struct list_head ro_list; 555 556 atomic_t trimming; 557 558 /* For dirty block groups */ 559 struct list_head dirty_list; 560 struct list_head io_list; 561 562 struct btrfs_io_ctl io_ctl; 563 564 /* 565 * Incremented when doing extent allocations and holding a read lock 566 * on the space_info's groups_sem semaphore. 567 * Decremented when an ordered extent that represents an IO against this 568 * block group's range is created (after it's added to its inode's 569 * root's list of ordered extents) or immediately after the allocation 570 * if it's a metadata extent or fallocate extent (for these cases we 571 * don't create ordered extents). 572 */ 573 atomic_t reservations; 574 575 /* 576 * Incremented while holding the spinlock *lock* by a task checking if 577 * it can perform a nocow write (incremented if the value for the *ro* 578 * field is 0). Decremented by such tasks once they create an ordered 579 * extent or before that if some error happens before reaching that step. 580 * This is to prevent races between block group relocation and nocow 581 * writes through direct IO. 582 */ 583 atomic_t nocow_writers; 584 585 /* Lock for free space tree operations. */ 586 struct mutex free_space_lock; 587 588 /* 589 * Does the block group need to be added to the free space tree? 590 * Protected by free_space_lock. 591 */ 592 int needs_free_space; 593 594 /* Record locked full stripes for RAID5/6 block group */ 595 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 596 }; 597 598 /* delayed seq elem */ 599 struct seq_list { 600 struct list_head list; 601 u64 seq; 602 }; 603 604 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 605 606 #define SEQ_LAST ((u64)-1) 607 608 enum btrfs_orphan_cleanup_state { 609 ORPHAN_CLEANUP_STARTED = 1, 610 ORPHAN_CLEANUP_DONE = 2, 611 }; 612 613 /* used by the raid56 code to lock stripes for read/modify/write */ 614 struct btrfs_stripe_hash { 615 struct list_head hash_list; 616 spinlock_t lock; 617 }; 618 619 /* used by the raid56 code to lock stripes for read/modify/write */ 620 struct btrfs_stripe_hash_table { 621 struct list_head stripe_cache; 622 spinlock_t cache_lock; 623 int cache_size; 624 struct btrfs_stripe_hash table[]; 625 }; 626 627 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 628 629 void btrfs_init_async_reclaim_work(struct work_struct *work); 630 631 /* fs_info */ 632 struct reloc_control; 633 struct btrfs_device; 634 struct btrfs_fs_devices; 635 struct btrfs_balance_control; 636 struct btrfs_delayed_root; 637 638 /* 639 * Block group or device which contains an active swapfile. Used for preventing 640 * unsafe operations while a swapfile is active. 641 * 642 * These are sorted on (ptr, inode) (note that a block group or device can 643 * contain more than one swapfile). We compare the pointer values because we 644 * don't actually care what the object is, we just need a quick check whether 645 * the object exists in the rbtree. 646 */ 647 struct btrfs_swapfile_pin { 648 struct rb_node node; 649 void *ptr; 650 struct inode *inode; 651 /* 652 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise, 653 * ptr points to a struct btrfs_device. 654 */ 655 bool is_block_group; 656 }; 657 658 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 659 660 enum { 661 BTRFS_FS_BARRIER, 662 BTRFS_FS_CLOSING_START, 663 BTRFS_FS_CLOSING_DONE, 664 BTRFS_FS_LOG_RECOVERING, 665 BTRFS_FS_OPEN, 666 BTRFS_FS_QUOTA_ENABLED, 667 BTRFS_FS_UPDATE_UUID_TREE_GEN, 668 BTRFS_FS_CREATING_FREE_SPACE_TREE, 669 BTRFS_FS_BTREE_ERR, 670 BTRFS_FS_LOG1_ERR, 671 BTRFS_FS_LOG2_ERR, 672 BTRFS_FS_QUOTA_OVERRIDE, 673 /* Used to record internally whether fs has been frozen */ 674 BTRFS_FS_FROZEN, 675 /* 676 * Indicate that a whole-filesystem exclusive operation is running 677 * (device replace, resize, device add/delete, balance) 678 */ 679 BTRFS_FS_EXCL_OP, 680 /* 681 * To info transaction_kthread we need an immediate commit so it 682 * doesn't need to wait for commit_interval 683 */ 684 BTRFS_FS_NEED_ASYNC_COMMIT, 685 /* 686 * Indicate that balance has been set up from the ioctl and is in the 687 * main phase. The fs_info::balance_ctl is initialized. 688 * Set and cleared while holding fs_info::balance_mutex. 689 */ 690 BTRFS_FS_BALANCE_RUNNING, 691 692 /* Indicate that the cleaner thread is awake and doing something. */ 693 BTRFS_FS_CLEANER_RUNNING, 694 695 /* 696 * The checksumming has an optimized version and is considered fast, 697 * so we don't need to offload checksums to workqueues. 698 */ 699 BTRFS_FS_CSUM_IMPL_FAST, 700 }; 701 702 struct btrfs_fs_info { 703 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 704 unsigned long flags; 705 struct btrfs_root *extent_root; 706 struct btrfs_root *tree_root; 707 struct btrfs_root *chunk_root; 708 struct btrfs_root *dev_root; 709 struct btrfs_root *fs_root; 710 struct btrfs_root *csum_root; 711 struct btrfs_root *quota_root; 712 struct btrfs_root *uuid_root; 713 struct btrfs_root *free_space_root; 714 715 /* the log root tree is a directory of all the other log roots */ 716 struct btrfs_root *log_root_tree; 717 718 spinlock_t fs_roots_radix_lock; 719 struct radix_tree_root fs_roots_radix; 720 721 /* block group cache stuff */ 722 spinlock_t block_group_cache_lock; 723 u64 first_logical_byte; 724 struct rb_root block_group_cache_tree; 725 726 /* keep track of unallocated space */ 727 atomic64_t free_chunk_space; 728 729 struct extent_io_tree freed_extents[2]; 730 struct extent_io_tree *pinned_extents; 731 732 /* logical->physical extent mapping */ 733 struct extent_map_tree mapping_tree; 734 735 /* 736 * block reservation for extent, checksum, root tree and 737 * delayed dir index item 738 */ 739 struct btrfs_block_rsv global_block_rsv; 740 /* block reservation for metadata operations */ 741 struct btrfs_block_rsv trans_block_rsv; 742 /* block reservation for chunk tree */ 743 struct btrfs_block_rsv chunk_block_rsv; 744 /* block reservation for delayed operations */ 745 struct btrfs_block_rsv delayed_block_rsv; 746 /* block reservation for delayed refs */ 747 struct btrfs_block_rsv delayed_refs_rsv; 748 749 struct btrfs_block_rsv empty_block_rsv; 750 751 u64 generation; 752 u64 last_trans_committed; 753 u64 avg_delayed_ref_runtime; 754 755 /* 756 * this is updated to the current trans every time a full commit 757 * is required instead of the faster short fsync log commits 758 */ 759 u64 last_trans_log_full_commit; 760 unsigned long mount_opt; 761 /* 762 * Track requests for actions that need to be done during transaction 763 * commit (like for some mount options). 764 */ 765 unsigned long pending_changes; 766 unsigned long compress_type:4; 767 unsigned int compress_level; 768 u32 commit_interval; 769 /* 770 * It is a suggestive number, the read side is safe even it gets a 771 * wrong number because we will write out the data into a regular 772 * extent. The write side(mount/remount) is under ->s_umount lock, 773 * so it is also safe. 774 */ 775 u64 max_inline; 776 777 struct btrfs_transaction *running_transaction; 778 wait_queue_head_t transaction_throttle; 779 wait_queue_head_t transaction_wait; 780 wait_queue_head_t transaction_blocked_wait; 781 wait_queue_head_t async_submit_wait; 782 783 /* 784 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 785 * when they are updated. 786 * 787 * Because we do not clear the flags for ever, so we needn't use 788 * the lock on the read side. 789 * 790 * We also needn't use the lock when we mount the fs, because 791 * there is no other task which will update the flag. 792 */ 793 spinlock_t super_lock; 794 struct btrfs_super_block *super_copy; 795 struct btrfs_super_block *super_for_commit; 796 struct super_block *sb; 797 struct inode *btree_inode; 798 struct mutex tree_log_mutex; 799 struct mutex transaction_kthread_mutex; 800 struct mutex cleaner_mutex; 801 struct mutex chunk_mutex; 802 803 /* 804 * this is taken to make sure we don't set block groups ro after 805 * the free space cache has been allocated on them 806 */ 807 struct mutex ro_block_group_mutex; 808 809 /* this is used during read/modify/write to make sure 810 * no two ios are trying to mod the same stripe at the same 811 * time 812 */ 813 struct btrfs_stripe_hash_table *stripe_hash_table; 814 815 /* 816 * this protects the ordered operations list only while we are 817 * processing all of the entries on it. This way we make 818 * sure the commit code doesn't find the list temporarily empty 819 * because another function happens to be doing non-waiting preflush 820 * before jumping into the main commit. 821 */ 822 struct mutex ordered_operations_mutex; 823 824 struct rw_semaphore commit_root_sem; 825 826 struct rw_semaphore cleanup_work_sem; 827 828 struct rw_semaphore subvol_sem; 829 struct srcu_struct subvol_srcu; 830 831 spinlock_t trans_lock; 832 /* 833 * the reloc mutex goes with the trans lock, it is taken 834 * during commit to protect us from the relocation code 835 */ 836 struct mutex reloc_mutex; 837 838 struct list_head trans_list; 839 struct list_head dead_roots; 840 struct list_head caching_block_groups; 841 842 spinlock_t delayed_iput_lock; 843 struct list_head delayed_iputs; 844 atomic_t nr_delayed_iputs; 845 wait_queue_head_t delayed_iputs_wait; 846 847 /* this protects tree_mod_seq_list */ 848 spinlock_t tree_mod_seq_lock; 849 atomic64_t tree_mod_seq; 850 struct list_head tree_mod_seq_list; 851 852 /* this protects tree_mod_log */ 853 rwlock_t tree_mod_log_lock; 854 struct rb_root tree_mod_log; 855 856 atomic_t async_delalloc_pages; 857 858 /* 859 * this is used to protect the following list -- ordered_roots. 860 */ 861 spinlock_t ordered_root_lock; 862 863 /* 864 * all fs/file tree roots in which there are data=ordered extents 865 * pending writeback are added into this list. 866 * 867 * these can span multiple transactions and basically include 868 * every dirty data page that isn't from nodatacow 869 */ 870 struct list_head ordered_roots; 871 872 struct mutex delalloc_root_mutex; 873 spinlock_t delalloc_root_lock; 874 /* all fs/file tree roots that have delalloc inodes. */ 875 struct list_head delalloc_roots; 876 877 /* 878 * there is a pool of worker threads for checksumming during writes 879 * and a pool for checksumming after reads. This is because readers 880 * can run with FS locks held, and the writers may be waiting for 881 * those locks. We don't want ordering in the pending list to cause 882 * deadlocks, and so the two are serviced separately. 883 * 884 * A third pool does submit_bio to avoid deadlocking with the other 885 * two 886 */ 887 struct btrfs_workqueue *workers; 888 struct btrfs_workqueue *delalloc_workers; 889 struct btrfs_workqueue *flush_workers; 890 struct btrfs_workqueue *endio_workers; 891 struct btrfs_workqueue *endio_meta_workers; 892 struct btrfs_workqueue *endio_raid56_workers; 893 struct btrfs_workqueue *endio_repair_workers; 894 struct btrfs_workqueue *rmw_workers; 895 struct btrfs_workqueue *endio_meta_write_workers; 896 struct btrfs_workqueue *endio_write_workers; 897 struct btrfs_workqueue *endio_freespace_worker; 898 struct btrfs_workqueue *submit_workers; 899 struct btrfs_workqueue *caching_workers; 900 struct btrfs_workqueue *readahead_workers; 901 902 /* 903 * fixup workers take dirty pages that didn't properly go through 904 * the cow mechanism and make them safe to write. It happens 905 * for the sys_munmap function call path 906 */ 907 struct btrfs_workqueue *fixup_workers; 908 struct btrfs_workqueue *delayed_workers; 909 910 /* the extent workers do delayed refs on the extent allocation tree */ 911 struct btrfs_workqueue *extent_workers; 912 struct task_struct *transaction_kthread; 913 struct task_struct *cleaner_kthread; 914 u32 thread_pool_size; 915 916 struct kobject *space_info_kobj; 917 918 u64 total_pinned; 919 920 /* used to keep from writing metadata until there is a nice batch */ 921 struct percpu_counter dirty_metadata_bytes; 922 struct percpu_counter delalloc_bytes; 923 struct percpu_counter dio_bytes; 924 s32 dirty_metadata_batch; 925 s32 delalloc_batch; 926 927 struct list_head dirty_cowonly_roots; 928 929 struct btrfs_fs_devices *fs_devices; 930 931 /* 932 * The space_info list is effectively read only after initial 933 * setup. It is populated at mount time and cleaned up after 934 * all block groups are removed. RCU is used to protect it. 935 */ 936 struct list_head space_info; 937 938 struct btrfs_space_info *data_sinfo; 939 940 struct reloc_control *reloc_ctl; 941 942 /* data_alloc_cluster is only used in ssd_spread mode */ 943 struct btrfs_free_cluster data_alloc_cluster; 944 945 /* all metadata allocations go through this cluster */ 946 struct btrfs_free_cluster meta_alloc_cluster; 947 948 /* auto defrag inodes go here */ 949 spinlock_t defrag_inodes_lock; 950 struct rb_root defrag_inodes; 951 atomic_t defrag_running; 952 953 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 954 seqlock_t profiles_lock; 955 /* 956 * these three are in extended format (availability of single 957 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 958 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 959 */ 960 u64 avail_data_alloc_bits; 961 u64 avail_metadata_alloc_bits; 962 u64 avail_system_alloc_bits; 963 964 /* restriper state */ 965 spinlock_t balance_lock; 966 struct mutex balance_mutex; 967 atomic_t balance_pause_req; 968 atomic_t balance_cancel_req; 969 struct btrfs_balance_control *balance_ctl; 970 wait_queue_head_t balance_wait_q; 971 972 u32 data_chunk_allocations; 973 u32 metadata_ratio; 974 975 void *bdev_holder; 976 977 /* private scrub information */ 978 struct mutex scrub_lock; 979 atomic_t scrubs_running; 980 atomic_t scrub_pause_req; 981 atomic_t scrubs_paused; 982 atomic_t scrub_cancel_req; 983 wait_queue_head_t scrub_pause_wait; 984 /* 985 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 986 * running. 987 */ 988 refcount_t scrub_workers_refcnt; 989 struct btrfs_workqueue *scrub_workers; 990 struct btrfs_workqueue *scrub_wr_completion_workers; 991 struct btrfs_workqueue *scrub_parity_workers; 992 993 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 994 u32 check_integrity_print_mask; 995 #endif 996 /* is qgroup tracking in a consistent state? */ 997 u64 qgroup_flags; 998 999 /* holds configuration and tracking. Protected by qgroup_lock */ 1000 struct rb_root qgroup_tree; 1001 spinlock_t qgroup_lock; 1002 1003 /* 1004 * used to avoid frequently calling ulist_alloc()/ulist_free() 1005 * when doing qgroup accounting, it must be protected by qgroup_lock. 1006 */ 1007 struct ulist *qgroup_ulist; 1008 1009 /* protect user change for quota operations */ 1010 struct mutex qgroup_ioctl_lock; 1011 1012 /* list of dirty qgroups to be written at next commit */ 1013 struct list_head dirty_qgroups; 1014 1015 /* used by qgroup for an efficient tree traversal */ 1016 u64 qgroup_seq; 1017 1018 /* qgroup rescan items */ 1019 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1020 struct btrfs_key qgroup_rescan_progress; 1021 struct btrfs_workqueue *qgroup_rescan_workers; 1022 struct completion qgroup_rescan_completion; 1023 struct btrfs_work qgroup_rescan_work; 1024 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1025 1026 /* filesystem state */ 1027 unsigned long fs_state; 1028 1029 struct btrfs_delayed_root *delayed_root; 1030 1031 /* readahead tree */ 1032 spinlock_t reada_lock; 1033 struct radix_tree_root reada_tree; 1034 1035 /* readahead works cnt */ 1036 atomic_t reada_works_cnt; 1037 1038 /* Extent buffer radix tree */ 1039 spinlock_t buffer_lock; 1040 struct radix_tree_root buffer_radix; 1041 1042 /* next backup root to be overwritten */ 1043 int backup_root_index; 1044 1045 /* device replace state */ 1046 struct btrfs_dev_replace dev_replace; 1047 1048 struct semaphore uuid_tree_rescan_sem; 1049 1050 /* Used to reclaim the metadata space in the background. */ 1051 struct work_struct async_reclaim_work; 1052 1053 spinlock_t unused_bgs_lock; 1054 struct list_head unused_bgs; 1055 struct mutex unused_bg_unpin_mutex; 1056 struct mutex delete_unused_bgs_mutex; 1057 1058 /* Cached block sizes */ 1059 u32 nodesize; 1060 u32 sectorsize; 1061 u32 stripesize; 1062 1063 /* Block groups and devices containing active swapfiles. */ 1064 spinlock_t swapfile_pins_lock; 1065 struct rb_root swapfile_pins; 1066 1067 struct crypto_shash *csum_shash; 1068 1069 /* 1070 * Number of send operations in progress. 1071 * Updated while holding fs_info::balance_mutex. 1072 */ 1073 int send_in_progress; 1074 1075 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1076 spinlock_t ref_verify_lock; 1077 struct rb_root block_tree; 1078 #endif 1079 }; 1080 1081 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1082 { 1083 return sb->s_fs_info; 1084 } 1085 1086 struct btrfs_subvolume_writers { 1087 struct percpu_counter counter; 1088 wait_queue_head_t wait; 1089 }; 1090 1091 /* 1092 * The state of btrfs root 1093 */ 1094 enum { 1095 /* 1096 * btrfs_record_root_in_trans is a multi-step process, and it can race 1097 * with the balancing code. But the race is very small, and only the 1098 * first time the root is added to each transaction. So IN_TRANS_SETUP 1099 * is used to tell us when more checks are required 1100 */ 1101 BTRFS_ROOT_IN_TRANS_SETUP, 1102 BTRFS_ROOT_REF_COWS, 1103 BTRFS_ROOT_TRACK_DIRTY, 1104 BTRFS_ROOT_IN_RADIX, 1105 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1106 BTRFS_ROOT_DEFRAG_RUNNING, 1107 BTRFS_ROOT_FORCE_COW, 1108 BTRFS_ROOT_MULTI_LOG_TASKS, 1109 BTRFS_ROOT_DIRTY, 1110 BTRFS_ROOT_DELETING, 1111 1112 /* 1113 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1114 * 1115 * Set for the subvolume tree owning the reloc tree. 1116 */ 1117 BTRFS_ROOT_DEAD_RELOC_TREE, 1118 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1119 BTRFS_ROOT_DEAD_TREE, 1120 }; 1121 1122 /* 1123 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1124 * code. For detail check comment in fs/btrfs/qgroup.c. 1125 */ 1126 struct btrfs_qgroup_swapped_blocks { 1127 spinlock_t lock; 1128 /* RM_EMPTY_ROOT() of above blocks[] */ 1129 bool swapped; 1130 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1131 }; 1132 1133 /* 1134 * in ram representation of the tree. extent_root is used for all allocations 1135 * and for the extent tree extent_root root. 1136 */ 1137 struct btrfs_root { 1138 struct extent_buffer *node; 1139 1140 struct extent_buffer *commit_root; 1141 struct btrfs_root *log_root; 1142 struct btrfs_root *reloc_root; 1143 1144 unsigned long state; 1145 struct btrfs_root_item root_item; 1146 struct btrfs_key root_key; 1147 struct btrfs_fs_info *fs_info; 1148 struct extent_io_tree dirty_log_pages; 1149 1150 struct mutex objectid_mutex; 1151 1152 spinlock_t accounting_lock; 1153 struct btrfs_block_rsv *block_rsv; 1154 1155 /* free ino cache stuff */ 1156 struct btrfs_free_space_ctl *free_ino_ctl; 1157 enum btrfs_caching_type ino_cache_state; 1158 spinlock_t ino_cache_lock; 1159 wait_queue_head_t ino_cache_wait; 1160 struct btrfs_free_space_ctl *free_ino_pinned; 1161 u64 ino_cache_progress; 1162 struct inode *ino_cache_inode; 1163 1164 struct mutex log_mutex; 1165 wait_queue_head_t log_writer_wait; 1166 wait_queue_head_t log_commit_wait[2]; 1167 struct list_head log_ctxs[2]; 1168 atomic_t log_writers; 1169 atomic_t log_commit[2]; 1170 atomic_t log_batch; 1171 int log_transid; 1172 /* No matter the commit succeeds or not*/ 1173 int log_transid_committed; 1174 /* Just be updated when the commit succeeds. */ 1175 int last_log_commit; 1176 pid_t log_start_pid; 1177 1178 u64 last_trans; 1179 1180 u32 type; 1181 1182 u64 highest_objectid; 1183 1184 u64 defrag_trans_start; 1185 struct btrfs_key defrag_progress; 1186 struct btrfs_key defrag_max; 1187 1188 /* the dirty list is only used by non-reference counted roots */ 1189 struct list_head dirty_list; 1190 1191 struct list_head root_list; 1192 1193 spinlock_t log_extents_lock[2]; 1194 struct list_head logged_list[2]; 1195 1196 int orphan_cleanup_state; 1197 1198 spinlock_t inode_lock; 1199 /* red-black tree that keeps track of in-memory inodes */ 1200 struct rb_root inode_tree; 1201 1202 /* 1203 * radix tree that keeps track of delayed nodes of every inode, 1204 * protected by inode_lock 1205 */ 1206 struct radix_tree_root delayed_nodes_tree; 1207 /* 1208 * right now this just gets used so that a root has its own devid 1209 * for stat. It may be used for more later 1210 */ 1211 dev_t anon_dev; 1212 1213 spinlock_t root_item_lock; 1214 refcount_t refs; 1215 1216 struct mutex delalloc_mutex; 1217 spinlock_t delalloc_lock; 1218 /* 1219 * all of the inodes that have delalloc bytes. It is possible for 1220 * this list to be empty even when there is still dirty data=ordered 1221 * extents waiting to finish IO. 1222 */ 1223 struct list_head delalloc_inodes; 1224 struct list_head delalloc_root; 1225 u64 nr_delalloc_inodes; 1226 1227 struct mutex ordered_extent_mutex; 1228 /* 1229 * this is used by the balancing code to wait for all the pending 1230 * ordered extents 1231 */ 1232 spinlock_t ordered_extent_lock; 1233 1234 /* 1235 * all of the data=ordered extents pending writeback 1236 * these can span multiple transactions and basically include 1237 * every dirty data page that isn't from nodatacow 1238 */ 1239 struct list_head ordered_extents; 1240 struct list_head ordered_root; 1241 u64 nr_ordered_extents; 1242 1243 /* 1244 * Not empty if this subvolume root has gone through tree block swap 1245 * (relocation) 1246 * 1247 * Will be used by reloc_control::dirty_subvol_roots. 1248 */ 1249 struct list_head reloc_dirty_list; 1250 1251 /* 1252 * Number of currently running SEND ioctls to prevent 1253 * manipulation with the read-only status via SUBVOL_SETFLAGS 1254 */ 1255 int send_in_progress; 1256 /* 1257 * Number of currently running deduplication operations that have a 1258 * destination inode belonging to this root. Protected by the lock 1259 * root_item_lock. 1260 */ 1261 int dedupe_in_progress; 1262 struct btrfs_subvolume_writers *subv_writers; 1263 atomic_t will_be_snapshotted; 1264 atomic_t snapshot_force_cow; 1265 1266 /* For qgroup metadata reserved space */ 1267 spinlock_t qgroup_meta_rsv_lock; 1268 u64 qgroup_meta_rsv_pertrans; 1269 u64 qgroup_meta_rsv_prealloc; 1270 1271 /* Number of active swapfiles */ 1272 atomic_t nr_swapfiles; 1273 1274 /* Record pairs of swapped blocks for qgroup */ 1275 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1276 1277 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1278 u64 alloc_bytenr; 1279 #endif 1280 }; 1281 1282 struct btrfs_file_private { 1283 void *filldir_buf; 1284 }; 1285 1286 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1287 { 1288 return btrfs_sb(inode->i_sb)->sectorsize; 1289 } 1290 1291 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1292 { 1293 1294 return info->nodesize - sizeof(struct btrfs_header); 1295 } 1296 1297 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1298 1299 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1300 { 1301 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1302 } 1303 1304 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1305 { 1306 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1307 } 1308 1309 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1310 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1311 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1312 { 1313 return BTRFS_MAX_ITEM_SIZE(info) - 1314 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1315 } 1316 1317 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1318 { 1319 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1320 } 1321 1322 /* 1323 * Flags for mount options. 1324 * 1325 * Note: don't forget to add new options to btrfs_show_options() 1326 */ 1327 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1328 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1329 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1330 #define BTRFS_MOUNT_SSD (1 << 3) 1331 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1332 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1333 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1334 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1335 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1336 #define BTRFS_MOUNT_NOSSD (1 << 9) 1337 #define BTRFS_MOUNT_DISCARD (1 << 10) 1338 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1339 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1340 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1341 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1342 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1343 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1344 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1345 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1346 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1347 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1348 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1349 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1350 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1351 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1352 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1353 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1354 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1355 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1356 1357 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1358 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1359 1360 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1361 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1362 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1363 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1364 BTRFS_MOUNT_##opt) 1365 1366 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1367 { \ 1368 if (!btrfs_test_opt(fs_info, opt)) \ 1369 btrfs_info(fs_info, fmt, ##args); \ 1370 btrfs_set_opt(fs_info->mount_opt, opt); \ 1371 } 1372 1373 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1374 { \ 1375 if (btrfs_test_opt(fs_info, opt)) \ 1376 btrfs_info(fs_info, fmt, ##args); \ 1377 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1378 } 1379 1380 #ifdef CONFIG_BTRFS_DEBUG 1381 static inline int 1382 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1383 { 1384 struct btrfs_fs_info *fs_info = block_group->fs_info; 1385 1386 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1387 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1388 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1389 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1390 } 1391 #endif 1392 1393 /* 1394 * Requests for changes that need to be done during transaction commit. 1395 * 1396 * Internal mount options that are used for special handling of the real 1397 * mount options (eg. cannot be set during remount and have to be set during 1398 * transaction commit) 1399 */ 1400 1401 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1402 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1403 #define BTRFS_PENDING_COMMIT (2) 1404 1405 #define btrfs_test_pending(info, opt) \ 1406 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1407 #define btrfs_set_pending(info, opt) \ 1408 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1409 #define btrfs_clear_pending(info, opt) \ 1410 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1411 1412 /* 1413 * Helpers for setting pending mount option changes. 1414 * 1415 * Expects corresponding macros 1416 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1417 */ 1418 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1419 do { \ 1420 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1421 btrfs_info((info), fmt, ##args); \ 1422 btrfs_set_pending((info), SET_##opt); \ 1423 btrfs_clear_pending((info), CLEAR_##opt); \ 1424 } \ 1425 } while(0) 1426 1427 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1428 do { \ 1429 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1430 btrfs_info((info), fmt, ##args); \ 1431 btrfs_set_pending((info), CLEAR_##opt); \ 1432 btrfs_clear_pending((info), SET_##opt); \ 1433 } \ 1434 } while(0) 1435 1436 /* 1437 * Inode flags 1438 */ 1439 #define BTRFS_INODE_NODATASUM (1 << 0) 1440 #define BTRFS_INODE_NODATACOW (1 << 1) 1441 #define BTRFS_INODE_READONLY (1 << 2) 1442 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1443 #define BTRFS_INODE_PREALLOC (1 << 4) 1444 #define BTRFS_INODE_SYNC (1 << 5) 1445 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1446 #define BTRFS_INODE_APPEND (1 << 7) 1447 #define BTRFS_INODE_NODUMP (1 << 8) 1448 #define BTRFS_INODE_NOATIME (1 << 9) 1449 #define BTRFS_INODE_DIRSYNC (1 << 10) 1450 #define BTRFS_INODE_COMPRESS (1 << 11) 1451 1452 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1453 1454 #define BTRFS_INODE_FLAG_MASK \ 1455 (BTRFS_INODE_NODATASUM | \ 1456 BTRFS_INODE_NODATACOW | \ 1457 BTRFS_INODE_READONLY | \ 1458 BTRFS_INODE_NOCOMPRESS | \ 1459 BTRFS_INODE_PREALLOC | \ 1460 BTRFS_INODE_SYNC | \ 1461 BTRFS_INODE_IMMUTABLE | \ 1462 BTRFS_INODE_APPEND | \ 1463 BTRFS_INODE_NODUMP | \ 1464 BTRFS_INODE_NOATIME | \ 1465 BTRFS_INODE_DIRSYNC | \ 1466 BTRFS_INODE_COMPRESS | \ 1467 BTRFS_INODE_ROOT_ITEM_INIT) 1468 1469 struct btrfs_map_token { 1470 const struct extent_buffer *eb; 1471 char *kaddr; 1472 unsigned long offset; 1473 }; 1474 1475 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1476 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1477 1478 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1479 { 1480 token->kaddr = NULL; 1481 } 1482 1483 /* some macros to generate set/get functions for the struct fields. This 1484 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1485 * one for u8: 1486 */ 1487 #define le8_to_cpu(v) (v) 1488 #define cpu_to_le8(v) (v) 1489 #define __le8 u8 1490 1491 #define read_eb_member(eb, ptr, type, member, result) (\ 1492 read_extent_buffer(eb, (char *)(result), \ 1493 ((unsigned long)(ptr)) + \ 1494 offsetof(type, member), \ 1495 sizeof(((type *)0)->member))) 1496 1497 #define write_eb_member(eb, ptr, type, member, result) (\ 1498 write_extent_buffer(eb, (char *)(result), \ 1499 ((unsigned long)(ptr)) + \ 1500 offsetof(type, member), \ 1501 sizeof(((type *)0)->member))) 1502 1503 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1504 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1505 const void *ptr, unsigned long off, \ 1506 struct btrfs_map_token *token); \ 1507 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1508 unsigned long off, u##bits val, \ 1509 struct btrfs_map_token *token); \ 1510 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1511 const void *ptr, \ 1512 unsigned long off) \ 1513 { \ 1514 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1515 } \ 1516 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1517 unsigned long off, u##bits val) \ 1518 { \ 1519 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1520 } 1521 1522 DECLARE_BTRFS_SETGET_BITS(8) 1523 DECLARE_BTRFS_SETGET_BITS(16) 1524 DECLARE_BTRFS_SETGET_BITS(32) 1525 DECLARE_BTRFS_SETGET_BITS(64) 1526 1527 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1528 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1529 const type *s) \ 1530 { \ 1531 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1532 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1533 } \ 1534 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1535 u##bits val) \ 1536 { \ 1537 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1538 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1539 } \ 1540 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1541 const type *s, \ 1542 struct btrfs_map_token *token) \ 1543 { \ 1544 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1545 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1546 } \ 1547 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1548 type *s, u##bits val, \ 1549 struct btrfs_map_token *token) \ 1550 { \ 1551 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1552 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1553 } 1554 1555 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1556 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1557 { \ 1558 const type *p = page_address(eb->pages[0]); \ 1559 u##bits res = le##bits##_to_cpu(p->member); \ 1560 return res; \ 1561 } \ 1562 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1563 u##bits val) \ 1564 { \ 1565 type *p = page_address(eb->pages[0]); \ 1566 p->member = cpu_to_le##bits(val); \ 1567 } 1568 1569 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1570 static inline u##bits btrfs_##name(const type *s) \ 1571 { \ 1572 return le##bits##_to_cpu(s->member); \ 1573 } \ 1574 static inline void btrfs_set_##name(type *s, u##bits val) \ 1575 { \ 1576 s->member = cpu_to_le##bits(val); \ 1577 } 1578 1579 1580 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1581 struct btrfs_dev_item *s) 1582 { 1583 BUILD_BUG_ON(sizeof(u64) != 1584 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1585 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1586 total_bytes)); 1587 } 1588 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1589 struct btrfs_dev_item *s, 1590 u64 val) 1591 { 1592 BUILD_BUG_ON(sizeof(u64) != 1593 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1594 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1595 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1596 } 1597 1598 1599 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1600 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1601 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1602 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1603 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1604 start_offset, 64); 1605 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1606 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1607 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1608 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1609 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1610 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1611 1612 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1613 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1614 total_bytes, 64); 1615 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1616 bytes_used, 64); 1617 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1618 io_align, 32); 1619 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1620 io_width, 32); 1621 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1622 sector_size, 32); 1623 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1624 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1625 dev_group, 32); 1626 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1627 seek_speed, 8); 1628 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1629 bandwidth, 8); 1630 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1631 generation, 64); 1632 1633 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1634 { 1635 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1636 } 1637 1638 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1639 { 1640 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1641 } 1642 1643 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1644 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1645 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1646 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1647 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1648 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1649 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1650 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1651 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1652 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1653 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1654 1655 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1656 { 1657 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1658 } 1659 1660 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1662 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1663 stripe_len, 64); 1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1665 io_align, 32); 1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1667 io_width, 32); 1668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1669 sector_size, 32); 1670 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1672 num_stripes, 16); 1673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1674 sub_stripes, 16); 1675 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1676 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1677 1678 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1679 int nr) 1680 { 1681 unsigned long offset = (unsigned long)c; 1682 offset += offsetof(struct btrfs_chunk, stripe); 1683 offset += nr * sizeof(struct btrfs_stripe); 1684 return (struct btrfs_stripe *)offset; 1685 } 1686 1687 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1688 { 1689 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1690 } 1691 1692 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1693 struct btrfs_chunk *c, int nr) 1694 { 1695 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1696 } 1697 1698 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1699 struct btrfs_chunk *c, int nr) 1700 { 1701 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1702 } 1703 1704 /* struct btrfs_block_group_item */ 1705 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1706 used, 64); 1707 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1708 used, 64); 1709 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1710 struct btrfs_block_group_item, chunk_objectid, 64); 1711 1712 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1713 struct btrfs_block_group_item, chunk_objectid, 64); 1714 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1715 struct btrfs_block_group_item, flags, 64); 1716 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1717 struct btrfs_block_group_item, flags, 64); 1718 1719 /* struct btrfs_free_space_info */ 1720 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1721 extent_count, 32); 1722 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1723 1724 /* struct btrfs_inode_ref */ 1725 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1726 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1727 1728 /* struct btrfs_inode_extref */ 1729 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1730 parent_objectid, 64); 1731 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1732 name_len, 16); 1733 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1734 1735 /* struct btrfs_inode_item */ 1736 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1737 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1738 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1739 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1740 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1741 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1742 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1743 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1744 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1745 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1746 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1747 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1749 generation, 64); 1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1751 sequence, 64); 1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1753 transid, 64); 1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1756 nbytes, 64); 1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1758 block_group, 64); 1759 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1761 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1765 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1766 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1767 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1768 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1769 1770 /* struct btrfs_dev_extent */ 1771 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1772 chunk_tree, 64); 1773 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1774 chunk_objectid, 64); 1775 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1776 chunk_offset, 64); 1777 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1778 1779 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1780 { 1781 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1782 return (unsigned long)dev + ptr; 1783 } 1784 1785 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1786 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1787 generation, 64); 1788 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1789 1790 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1791 1792 1793 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1794 1795 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1796 struct btrfs_tree_block_info *item, 1797 struct btrfs_disk_key *key) 1798 { 1799 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1800 } 1801 1802 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1803 struct btrfs_tree_block_info *item, 1804 struct btrfs_disk_key *key) 1805 { 1806 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1807 } 1808 1809 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1810 root, 64); 1811 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1812 objectid, 64); 1813 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1814 offset, 64); 1815 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1816 count, 32); 1817 1818 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1819 count, 32); 1820 1821 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1822 type, 8); 1823 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1824 offset, 64); 1825 1826 static inline u32 btrfs_extent_inline_ref_size(int type) 1827 { 1828 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1829 type == BTRFS_SHARED_BLOCK_REF_KEY) 1830 return sizeof(struct btrfs_extent_inline_ref); 1831 if (type == BTRFS_SHARED_DATA_REF_KEY) 1832 return sizeof(struct btrfs_shared_data_ref) + 1833 sizeof(struct btrfs_extent_inline_ref); 1834 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1835 return sizeof(struct btrfs_extent_data_ref) + 1836 offsetof(struct btrfs_extent_inline_ref, offset); 1837 return 0; 1838 } 1839 1840 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1841 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1842 generation, 64); 1843 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1844 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1845 1846 /* struct btrfs_node */ 1847 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1848 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1849 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1850 blockptr, 64); 1851 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1852 generation, 64); 1853 1854 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1855 { 1856 unsigned long ptr; 1857 ptr = offsetof(struct btrfs_node, ptrs) + 1858 sizeof(struct btrfs_key_ptr) * nr; 1859 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1860 } 1861 1862 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1863 int nr, u64 val) 1864 { 1865 unsigned long ptr; 1866 ptr = offsetof(struct btrfs_node, ptrs) + 1867 sizeof(struct btrfs_key_ptr) * nr; 1868 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1869 } 1870 1871 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1872 { 1873 unsigned long ptr; 1874 ptr = offsetof(struct btrfs_node, ptrs) + 1875 sizeof(struct btrfs_key_ptr) * nr; 1876 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1877 } 1878 1879 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1880 int nr, u64 val) 1881 { 1882 unsigned long ptr; 1883 ptr = offsetof(struct btrfs_node, ptrs) + 1884 sizeof(struct btrfs_key_ptr) * nr; 1885 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1886 } 1887 1888 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1889 { 1890 return offsetof(struct btrfs_node, ptrs) + 1891 sizeof(struct btrfs_key_ptr) * nr; 1892 } 1893 1894 void btrfs_node_key(const struct extent_buffer *eb, 1895 struct btrfs_disk_key *disk_key, int nr); 1896 1897 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1898 struct btrfs_disk_key *disk_key, int nr) 1899 { 1900 unsigned long ptr; 1901 ptr = btrfs_node_key_ptr_offset(nr); 1902 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1903 struct btrfs_key_ptr, key, disk_key); 1904 } 1905 1906 /* struct btrfs_item */ 1907 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1908 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1909 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1910 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1911 1912 static inline unsigned long btrfs_item_nr_offset(int nr) 1913 { 1914 return offsetof(struct btrfs_leaf, items) + 1915 sizeof(struct btrfs_item) * nr; 1916 } 1917 1918 static inline struct btrfs_item *btrfs_item_nr(int nr) 1919 { 1920 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1921 } 1922 1923 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1924 struct btrfs_item *item) 1925 { 1926 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1927 } 1928 1929 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1930 { 1931 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1932 } 1933 1934 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1935 { 1936 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1937 } 1938 1939 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1940 { 1941 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1942 } 1943 1944 static inline void btrfs_item_key(const struct extent_buffer *eb, 1945 struct btrfs_disk_key *disk_key, int nr) 1946 { 1947 struct btrfs_item *item = btrfs_item_nr(nr); 1948 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1949 } 1950 1951 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1952 struct btrfs_disk_key *disk_key, int nr) 1953 { 1954 struct btrfs_item *item = btrfs_item_nr(nr); 1955 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1956 } 1957 1958 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1959 1960 /* 1961 * struct btrfs_root_ref 1962 */ 1963 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1964 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1965 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1966 1967 /* struct btrfs_dir_item */ 1968 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1969 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1970 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1971 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1972 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1973 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1974 data_len, 16); 1975 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1976 name_len, 16); 1977 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1978 transid, 64); 1979 1980 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1981 const struct btrfs_dir_item *item, 1982 struct btrfs_disk_key *key) 1983 { 1984 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1985 } 1986 1987 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1988 struct btrfs_dir_item *item, 1989 const struct btrfs_disk_key *key) 1990 { 1991 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1992 } 1993 1994 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1995 num_entries, 64); 1996 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1997 num_bitmaps, 64); 1998 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1999 generation, 64); 2000 2001 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 2002 const struct btrfs_free_space_header *h, 2003 struct btrfs_disk_key *key) 2004 { 2005 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2006 } 2007 2008 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 2009 struct btrfs_free_space_header *h, 2010 const struct btrfs_disk_key *key) 2011 { 2012 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2013 } 2014 2015 /* struct btrfs_disk_key */ 2016 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2017 objectid, 64); 2018 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2019 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2020 2021 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2022 const struct btrfs_disk_key *disk) 2023 { 2024 cpu->offset = le64_to_cpu(disk->offset); 2025 cpu->type = disk->type; 2026 cpu->objectid = le64_to_cpu(disk->objectid); 2027 } 2028 2029 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2030 const struct btrfs_key *cpu) 2031 { 2032 disk->offset = cpu_to_le64(cpu->offset); 2033 disk->type = cpu->type; 2034 disk->objectid = cpu_to_le64(cpu->objectid); 2035 } 2036 2037 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2038 struct btrfs_key *key, int nr) 2039 { 2040 struct btrfs_disk_key disk_key; 2041 btrfs_node_key(eb, &disk_key, nr); 2042 btrfs_disk_key_to_cpu(key, &disk_key); 2043 } 2044 2045 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2046 struct btrfs_key *key, int nr) 2047 { 2048 struct btrfs_disk_key disk_key; 2049 btrfs_item_key(eb, &disk_key, nr); 2050 btrfs_disk_key_to_cpu(key, &disk_key); 2051 } 2052 2053 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2054 const struct btrfs_dir_item *item, 2055 struct btrfs_key *key) 2056 { 2057 struct btrfs_disk_key disk_key; 2058 btrfs_dir_item_key(eb, item, &disk_key); 2059 btrfs_disk_key_to_cpu(key, &disk_key); 2060 } 2061 2062 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2063 { 2064 return key->type; 2065 } 2066 2067 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2068 { 2069 key->type = val; 2070 } 2071 2072 /* struct btrfs_header */ 2073 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2074 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2075 generation, 64); 2076 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2077 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2078 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2079 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2080 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2081 generation, 64); 2082 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2083 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2084 nritems, 32); 2085 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2086 2087 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2088 { 2089 return (btrfs_header_flags(eb) & flag) == flag; 2090 } 2091 2092 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2093 { 2094 u64 flags = btrfs_header_flags(eb); 2095 btrfs_set_header_flags(eb, flags | flag); 2096 } 2097 2098 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2099 { 2100 u64 flags = btrfs_header_flags(eb); 2101 btrfs_set_header_flags(eb, flags & ~flag); 2102 } 2103 2104 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2105 { 2106 u64 flags = btrfs_header_flags(eb); 2107 return flags >> BTRFS_BACKREF_REV_SHIFT; 2108 } 2109 2110 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2111 int rev) 2112 { 2113 u64 flags = btrfs_header_flags(eb); 2114 flags &= ~BTRFS_BACKREF_REV_MASK; 2115 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2116 btrfs_set_header_flags(eb, flags); 2117 } 2118 2119 static inline unsigned long btrfs_header_fsid(void) 2120 { 2121 return offsetof(struct btrfs_header, fsid); 2122 } 2123 2124 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2125 { 2126 return offsetof(struct btrfs_header, chunk_tree_uuid); 2127 } 2128 2129 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2130 { 2131 return btrfs_header_level(eb) == 0; 2132 } 2133 2134 /* struct btrfs_root_item */ 2135 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2136 generation, 64); 2137 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2138 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2139 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2140 2141 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2142 generation, 64); 2143 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2144 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2145 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2146 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2147 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2148 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2149 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2150 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2151 last_snapshot, 64); 2152 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2153 generation_v2, 64); 2154 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2155 ctransid, 64); 2156 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2157 otransid, 64); 2158 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2159 stransid, 64); 2160 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2161 rtransid, 64); 2162 2163 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2164 { 2165 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2166 } 2167 2168 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2169 { 2170 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2171 } 2172 2173 /* struct btrfs_root_backup */ 2174 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2175 tree_root, 64); 2176 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2177 tree_root_gen, 64); 2178 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2179 tree_root_level, 8); 2180 2181 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2182 chunk_root, 64); 2183 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2184 chunk_root_gen, 64); 2185 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2186 chunk_root_level, 8); 2187 2188 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2189 extent_root, 64); 2190 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2191 extent_root_gen, 64); 2192 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2193 extent_root_level, 8); 2194 2195 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2196 fs_root, 64); 2197 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2198 fs_root_gen, 64); 2199 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2200 fs_root_level, 8); 2201 2202 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2203 dev_root, 64); 2204 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2205 dev_root_gen, 64); 2206 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2207 dev_root_level, 8); 2208 2209 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2210 csum_root, 64); 2211 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2212 csum_root_gen, 64); 2213 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2214 csum_root_level, 8); 2215 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2216 total_bytes, 64); 2217 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2218 bytes_used, 64); 2219 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2220 num_devices, 64); 2221 2222 /* struct btrfs_balance_item */ 2223 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2224 2225 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2226 const struct btrfs_balance_item *bi, 2227 struct btrfs_disk_balance_args *ba) 2228 { 2229 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2230 } 2231 2232 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2233 struct btrfs_balance_item *bi, 2234 const struct btrfs_disk_balance_args *ba) 2235 { 2236 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2237 } 2238 2239 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2240 const struct btrfs_balance_item *bi, 2241 struct btrfs_disk_balance_args *ba) 2242 { 2243 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2244 } 2245 2246 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2247 struct btrfs_balance_item *bi, 2248 const struct btrfs_disk_balance_args *ba) 2249 { 2250 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2251 } 2252 2253 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2254 const struct btrfs_balance_item *bi, 2255 struct btrfs_disk_balance_args *ba) 2256 { 2257 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2258 } 2259 2260 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2261 struct btrfs_balance_item *bi, 2262 const struct btrfs_disk_balance_args *ba) 2263 { 2264 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2265 } 2266 2267 static inline void 2268 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2269 const struct btrfs_disk_balance_args *disk) 2270 { 2271 memset(cpu, 0, sizeof(*cpu)); 2272 2273 cpu->profiles = le64_to_cpu(disk->profiles); 2274 cpu->usage = le64_to_cpu(disk->usage); 2275 cpu->devid = le64_to_cpu(disk->devid); 2276 cpu->pstart = le64_to_cpu(disk->pstart); 2277 cpu->pend = le64_to_cpu(disk->pend); 2278 cpu->vstart = le64_to_cpu(disk->vstart); 2279 cpu->vend = le64_to_cpu(disk->vend); 2280 cpu->target = le64_to_cpu(disk->target); 2281 cpu->flags = le64_to_cpu(disk->flags); 2282 cpu->limit = le64_to_cpu(disk->limit); 2283 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2284 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2285 } 2286 2287 static inline void 2288 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2289 const struct btrfs_balance_args *cpu) 2290 { 2291 memset(disk, 0, sizeof(*disk)); 2292 2293 disk->profiles = cpu_to_le64(cpu->profiles); 2294 disk->usage = cpu_to_le64(cpu->usage); 2295 disk->devid = cpu_to_le64(cpu->devid); 2296 disk->pstart = cpu_to_le64(cpu->pstart); 2297 disk->pend = cpu_to_le64(cpu->pend); 2298 disk->vstart = cpu_to_le64(cpu->vstart); 2299 disk->vend = cpu_to_le64(cpu->vend); 2300 disk->target = cpu_to_le64(cpu->target); 2301 disk->flags = cpu_to_le64(cpu->flags); 2302 disk->limit = cpu_to_le64(cpu->limit); 2303 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2304 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2305 } 2306 2307 /* struct btrfs_super_block */ 2308 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2309 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2310 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2311 generation, 64); 2312 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2313 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2314 struct btrfs_super_block, sys_chunk_array_size, 32); 2315 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2316 struct btrfs_super_block, chunk_root_generation, 64); 2317 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2318 root_level, 8); 2319 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2320 chunk_root, 64); 2321 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2322 chunk_root_level, 8); 2323 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2324 log_root, 64); 2325 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2326 log_root_transid, 64); 2327 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2328 log_root_level, 8); 2329 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2330 total_bytes, 64); 2331 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2332 bytes_used, 64); 2333 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2334 sectorsize, 32); 2335 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2336 nodesize, 32); 2337 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2338 stripesize, 32); 2339 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2340 root_dir_objectid, 64); 2341 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2342 num_devices, 64); 2343 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2344 compat_flags, 64); 2345 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2346 compat_ro_flags, 64); 2347 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2348 incompat_flags, 64); 2349 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2350 csum_type, 16); 2351 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2352 cache_generation, 64); 2353 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2354 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2355 uuid_tree_generation, 64); 2356 2357 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2358 { 2359 u16 t = btrfs_super_csum_type(s); 2360 /* 2361 * csum type is validated at mount time 2362 */ 2363 return btrfs_csum_sizes[t]; 2364 } 2365 2366 static inline const char *btrfs_super_csum_name(u16 csum_type) 2367 { 2368 /* csum type is validated at mount time */ 2369 return btrfs_csum_names[csum_type]; 2370 } 2371 2372 /* 2373 * The leaf data grows from end-to-front in the node. 2374 * this returns the address of the start of the last item, 2375 * which is the stop of the leaf data stack 2376 */ 2377 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2378 { 2379 u32 nr = btrfs_header_nritems(leaf); 2380 2381 if (nr == 0) 2382 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2383 return btrfs_item_offset_nr(leaf, nr - 1); 2384 } 2385 2386 /* struct btrfs_file_extent_item */ 2387 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2388 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2389 struct btrfs_file_extent_item, disk_bytenr, 64); 2390 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2391 struct btrfs_file_extent_item, offset, 64); 2392 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2393 struct btrfs_file_extent_item, generation, 64); 2394 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2395 struct btrfs_file_extent_item, num_bytes, 64); 2396 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2397 struct btrfs_file_extent_item, disk_num_bytes, 64); 2398 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2399 struct btrfs_file_extent_item, compression, 8); 2400 2401 static inline unsigned long 2402 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2403 { 2404 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2405 } 2406 2407 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2408 { 2409 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2410 } 2411 2412 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2413 disk_bytenr, 64); 2414 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2415 generation, 64); 2416 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2417 disk_num_bytes, 64); 2418 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2419 offset, 64); 2420 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2421 num_bytes, 64); 2422 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2423 ram_bytes, 64); 2424 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2425 compression, 8); 2426 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2427 encryption, 8); 2428 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2429 other_encoding, 16); 2430 2431 /* 2432 * this returns the number of bytes used by the item on disk, minus the 2433 * size of any extent headers. If a file is compressed on disk, this is 2434 * the compressed size 2435 */ 2436 static inline u32 btrfs_file_extent_inline_item_len( 2437 const struct extent_buffer *eb, 2438 struct btrfs_item *e) 2439 { 2440 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2441 } 2442 2443 /* btrfs_dev_stats_item */ 2444 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2445 const struct btrfs_dev_stats_item *ptr, 2446 int index) 2447 { 2448 u64 val; 2449 2450 read_extent_buffer(eb, &val, 2451 offsetof(struct btrfs_dev_stats_item, values) + 2452 ((unsigned long)ptr) + (index * sizeof(u64)), 2453 sizeof(val)); 2454 return val; 2455 } 2456 2457 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2458 struct btrfs_dev_stats_item *ptr, 2459 int index, u64 val) 2460 { 2461 write_extent_buffer(eb, &val, 2462 offsetof(struct btrfs_dev_stats_item, values) + 2463 ((unsigned long)ptr) + (index * sizeof(u64)), 2464 sizeof(val)); 2465 } 2466 2467 /* btrfs_qgroup_status_item */ 2468 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2469 generation, 64); 2470 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2471 version, 64); 2472 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2473 flags, 64); 2474 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2475 rescan, 64); 2476 2477 /* btrfs_qgroup_info_item */ 2478 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2479 generation, 64); 2480 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2481 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2482 rfer_cmpr, 64); 2483 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2484 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2485 excl_cmpr, 64); 2486 2487 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2488 struct btrfs_qgroup_info_item, generation, 64); 2489 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2490 rfer, 64); 2491 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2492 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2493 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2494 excl, 64); 2495 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2496 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2497 2498 /* btrfs_qgroup_limit_item */ 2499 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2500 flags, 64); 2501 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2502 max_rfer, 64); 2503 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2504 max_excl, 64); 2505 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2506 rsv_rfer, 64); 2507 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2508 rsv_excl, 64); 2509 2510 /* btrfs_dev_replace_item */ 2511 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2512 struct btrfs_dev_replace_item, src_devid, 64); 2513 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2514 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2515 64); 2516 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2517 replace_state, 64); 2518 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2519 time_started, 64); 2520 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2521 time_stopped, 64); 2522 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2523 num_write_errors, 64); 2524 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2525 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2526 64); 2527 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2528 cursor_left, 64); 2529 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2530 cursor_right, 64); 2531 2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2533 struct btrfs_dev_replace_item, src_devid, 64); 2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2535 struct btrfs_dev_replace_item, 2536 cont_reading_from_srcdev_mode, 64); 2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2538 struct btrfs_dev_replace_item, replace_state, 64); 2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2540 struct btrfs_dev_replace_item, time_started, 64); 2541 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2542 struct btrfs_dev_replace_item, time_stopped, 64); 2543 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2544 struct btrfs_dev_replace_item, num_write_errors, 64); 2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2546 struct btrfs_dev_replace_item, 2547 num_uncorrectable_read_errors, 64); 2548 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2549 struct btrfs_dev_replace_item, cursor_left, 64); 2550 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2551 struct btrfs_dev_replace_item, cursor_right, 64); 2552 2553 /* helper function to cast into the data area of the leaf. */ 2554 #define btrfs_item_ptr(leaf, slot, type) \ 2555 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2556 btrfs_item_offset_nr(leaf, slot))) 2557 2558 #define btrfs_item_ptr_offset(leaf, slot) \ 2559 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2560 btrfs_item_offset_nr(leaf, slot))) 2561 2562 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2563 { 2564 return crc32c(crc, address, length); 2565 } 2566 2567 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2568 { 2569 put_unaligned_le32(~crc, result); 2570 } 2571 2572 static inline u64 btrfs_name_hash(const char *name, int len) 2573 { 2574 return crc32c((u32)~1, name, len); 2575 } 2576 2577 /* 2578 * Figure the key offset of an extended inode ref 2579 */ 2580 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2581 int len) 2582 { 2583 return (u64) crc32c(parent_objectid, name, len); 2584 } 2585 2586 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2587 { 2588 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2589 } 2590 2591 /* extent-tree.c */ 2592 2593 enum btrfs_inline_ref_type { 2594 BTRFS_REF_TYPE_INVALID, 2595 BTRFS_REF_TYPE_BLOCK, 2596 BTRFS_REF_TYPE_DATA, 2597 BTRFS_REF_TYPE_ANY, 2598 }; 2599 2600 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2601 struct btrfs_extent_inline_ref *iref, 2602 enum btrfs_inline_ref_type is_data); 2603 2604 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2605 2606 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2607 unsigned num_items) 2608 { 2609 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2610 } 2611 2612 /* 2613 * Doing a truncate won't result in new nodes or leaves, just what we need for 2614 * COW. 2615 */ 2616 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2617 unsigned num_items) 2618 { 2619 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2620 } 2621 2622 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2623 const u64 start); 2624 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2625 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2626 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2627 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2628 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2629 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2630 unsigned long count); 2631 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2632 struct btrfs_delayed_ref_root *delayed_refs, 2633 struct btrfs_delayed_ref_head *head); 2634 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2635 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2636 struct btrfs_fs_info *fs_info, u64 bytenr, 2637 u64 offset, int metadata, u64 *refs, u64 *flags); 2638 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2639 u64 bytenr, u64 num, int reserved); 2640 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2641 u64 bytenr, u64 num_bytes); 2642 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2643 int btrfs_cross_ref_exist(struct btrfs_root *root, 2644 u64 objectid, u64 offset, u64 bytenr); 2645 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2646 struct btrfs_fs_info *info, 2647 u64 bytenr); 2648 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2649 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2650 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2651 struct btrfs_root *root, 2652 u64 parent, u64 root_objectid, 2653 const struct btrfs_disk_key *key, 2654 int level, u64 hint, 2655 u64 empty_size); 2656 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2657 struct btrfs_root *root, 2658 struct extent_buffer *buf, 2659 u64 parent, int last_ref); 2660 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2661 struct btrfs_root *root, u64 owner, 2662 u64 offset, u64 ram_bytes, 2663 struct btrfs_key *ins); 2664 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2665 u64 root_objectid, u64 owner, u64 offset, 2666 struct btrfs_key *ins); 2667 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2668 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2669 struct btrfs_key *ins, int is_data, int delalloc); 2670 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2671 struct extent_buffer *buf, int full_backref); 2672 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2673 struct extent_buffer *buf, int full_backref); 2674 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2675 u64 bytenr, u64 num_bytes, u64 flags, 2676 int level, int is_data); 2677 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2678 2679 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2680 u64 start, u64 len, int delalloc); 2681 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2682 u64 start, u64 len); 2683 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2684 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2685 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2686 struct btrfs_ref *generic_ref); 2687 2688 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2689 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans); 2690 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans); 2691 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2692 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2693 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2694 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2695 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2696 u64 bytes_used, u64 type, u64 chunk_offset, 2697 u64 size); 2698 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2699 struct btrfs_fs_info *fs_info, 2700 const u64 chunk_offset); 2701 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2702 u64 group_start, struct extent_map *em); 2703 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2704 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2705 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2706 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2707 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2708 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2709 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2710 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2711 2712 enum btrfs_reserve_flush_enum { 2713 /* If we are in the transaction, we can't flush anything.*/ 2714 BTRFS_RESERVE_NO_FLUSH, 2715 /* 2716 * Flushing delalloc may cause deadlock somewhere, in this 2717 * case, use FLUSH LIMIT 2718 */ 2719 BTRFS_RESERVE_FLUSH_LIMIT, 2720 BTRFS_RESERVE_FLUSH_ALL, 2721 }; 2722 2723 enum btrfs_flush_state { 2724 FLUSH_DELAYED_ITEMS_NR = 1, 2725 FLUSH_DELAYED_ITEMS = 2, 2726 FLUSH_DELAYED_REFS_NR = 3, 2727 FLUSH_DELAYED_REFS = 4, 2728 FLUSH_DELALLOC = 5, 2729 FLUSH_DELALLOC_WAIT = 6, 2730 ALLOC_CHUNK = 7, 2731 ALLOC_CHUNK_FORCE = 8, 2732 COMMIT_TRANS = 9, 2733 }; 2734 2735 /* 2736 * control flags for do_chunk_alloc's force field 2737 * CHUNK_ALLOC_NO_FORCE means to only allocate a chunk 2738 * if we really need one. 2739 * 2740 * CHUNK_ALLOC_LIMITED means to only try and allocate one 2741 * if we have very few chunks already allocated. This is 2742 * used as part of the clustering code to help make sure 2743 * we have a good pool of storage to cluster in, without 2744 * filling the FS with empty chunks 2745 * 2746 * CHUNK_ALLOC_FORCE means it must try to allocate one 2747 * 2748 */ 2749 enum btrfs_chunk_alloc_enum { 2750 CHUNK_ALLOC_NO_FORCE, 2751 CHUNK_ALLOC_LIMITED, 2752 CHUNK_ALLOC_FORCE, 2753 }; 2754 2755 int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags, 2756 enum btrfs_chunk_alloc_enum force); 2757 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2758 struct btrfs_block_rsv *rsv, 2759 int nitems, bool use_global_rsv); 2760 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2761 struct btrfs_block_rsv *rsv); 2762 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2763 bool qgroup_free); 2764 2765 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2766 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); 2767 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2768 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2769 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2770 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2771 u64 start, u64 end); 2772 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2773 u64 num_bytes, u64 *actual_bytes); 2774 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); 2775 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2776 2777 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2778 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2779 struct btrfs_fs_info *fs_info); 2780 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2781 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2782 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2783 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); 2784 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2785 u64 start, u64 end); 2786 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); 2787 2788 /* ctree.c */ 2789 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2790 int level, int *slot); 2791 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2792 int btrfs_previous_item(struct btrfs_root *root, 2793 struct btrfs_path *path, u64 min_objectid, 2794 int type); 2795 int btrfs_previous_extent_item(struct btrfs_root *root, 2796 struct btrfs_path *path, u64 min_objectid); 2797 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2798 struct btrfs_path *path, 2799 const struct btrfs_key *new_key); 2800 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2801 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2802 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2803 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2804 struct btrfs_key *key, int lowest_level, 2805 u64 min_trans); 2806 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2807 struct btrfs_path *path, 2808 u64 min_trans); 2809 enum btrfs_compare_tree_result { 2810 BTRFS_COMPARE_TREE_NEW, 2811 BTRFS_COMPARE_TREE_DELETED, 2812 BTRFS_COMPARE_TREE_CHANGED, 2813 BTRFS_COMPARE_TREE_SAME, 2814 }; 2815 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2816 struct btrfs_path *right_path, 2817 struct btrfs_key *key, 2818 enum btrfs_compare_tree_result result, 2819 void *ctx); 2820 int btrfs_compare_trees(struct btrfs_root *left_root, 2821 struct btrfs_root *right_root, 2822 btrfs_changed_cb_t cb, void *ctx); 2823 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2824 struct btrfs_root *root, struct extent_buffer *buf, 2825 struct extent_buffer *parent, int parent_slot, 2826 struct extent_buffer **cow_ret); 2827 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2828 struct btrfs_root *root, 2829 struct extent_buffer *buf, 2830 struct extent_buffer **cow_ret, u64 new_root_objectid); 2831 int btrfs_block_can_be_shared(struct btrfs_root *root, 2832 struct extent_buffer *buf); 2833 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2834 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2835 int btrfs_split_item(struct btrfs_trans_handle *trans, 2836 struct btrfs_root *root, 2837 struct btrfs_path *path, 2838 const struct btrfs_key *new_key, 2839 unsigned long split_offset); 2840 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2841 struct btrfs_root *root, 2842 struct btrfs_path *path, 2843 const struct btrfs_key *new_key); 2844 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2845 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2846 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2847 const struct btrfs_key *key, struct btrfs_path *p, 2848 int ins_len, int cow); 2849 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2850 struct btrfs_path *p, u64 time_seq); 2851 int btrfs_search_slot_for_read(struct btrfs_root *root, 2852 const struct btrfs_key *key, 2853 struct btrfs_path *p, int find_higher, 2854 int return_any); 2855 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2856 struct btrfs_root *root, struct extent_buffer *parent, 2857 int start_slot, u64 *last_ret, 2858 struct btrfs_key *progress); 2859 void btrfs_release_path(struct btrfs_path *p); 2860 struct btrfs_path *btrfs_alloc_path(void); 2861 void btrfs_free_path(struct btrfs_path *p); 2862 void btrfs_set_path_blocking(struct btrfs_path *p); 2863 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2864 2865 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2866 struct btrfs_path *path, int slot, int nr); 2867 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2868 struct btrfs_root *root, 2869 struct btrfs_path *path) 2870 { 2871 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2872 } 2873 2874 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2875 const struct btrfs_key *cpu_key, u32 *data_size, 2876 u32 total_data, u32 total_size, int nr); 2877 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2878 const struct btrfs_key *key, void *data, u32 data_size); 2879 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2880 struct btrfs_root *root, 2881 struct btrfs_path *path, 2882 const struct btrfs_key *cpu_key, u32 *data_size, 2883 int nr); 2884 2885 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2886 struct btrfs_root *root, 2887 struct btrfs_path *path, 2888 const struct btrfs_key *key, 2889 u32 data_size) 2890 { 2891 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2892 } 2893 2894 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2895 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2896 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2897 u64 time_seq); 2898 static inline int btrfs_next_old_item(struct btrfs_root *root, 2899 struct btrfs_path *p, u64 time_seq) 2900 { 2901 ++p->slots[0]; 2902 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2903 return btrfs_next_old_leaf(root, p, time_seq); 2904 return 0; 2905 } 2906 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2907 { 2908 return btrfs_next_old_item(root, p, 0); 2909 } 2910 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2911 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2912 struct btrfs_block_rsv *block_rsv, 2913 int update_ref, int for_reloc); 2914 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2915 struct btrfs_root *root, 2916 struct extent_buffer *node, 2917 struct extent_buffer *parent); 2918 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2919 { 2920 /* 2921 * Do it this way so we only ever do one test_bit in the normal case. 2922 */ 2923 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2924 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2925 return 2; 2926 return 1; 2927 } 2928 return 0; 2929 } 2930 2931 /* 2932 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2933 * anything except sleeping. This function is used to check the status of 2934 * the fs. 2935 */ 2936 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2937 { 2938 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2939 } 2940 2941 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2942 { 2943 kfree(fs_info->balance_ctl); 2944 kfree(fs_info->delayed_root); 2945 kfree(fs_info->extent_root); 2946 kfree(fs_info->tree_root); 2947 kfree(fs_info->chunk_root); 2948 kfree(fs_info->dev_root); 2949 kfree(fs_info->csum_root); 2950 kfree(fs_info->quota_root); 2951 kfree(fs_info->uuid_root); 2952 kfree(fs_info->free_space_root); 2953 kfree(fs_info->super_copy); 2954 kfree(fs_info->super_for_commit); 2955 kvfree(fs_info); 2956 } 2957 2958 /* tree mod log functions from ctree.c */ 2959 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2960 struct seq_list *elem); 2961 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2962 struct seq_list *elem); 2963 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2964 2965 /* root-item.c */ 2966 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2967 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2968 int name_len); 2969 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2970 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2971 int name_len); 2972 int btrfs_del_root(struct btrfs_trans_handle *trans, 2973 const struct btrfs_key *key); 2974 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2975 const struct btrfs_key *key, 2976 struct btrfs_root_item *item); 2977 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2978 struct btrfs_root *root, 2979 struct btrfs_key *key, 2980 struct btrfs_root_item *item); 2981 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2982 struct btrfs_path *path, struct btrfs_root_item *root_item, 2983 struct btrfs_key *root_key); 2984 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2985 void btrfs_set_root_node(struct btrfs_root_item *item, 2986 struct extent_buffer *node); 2987 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2988 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2989 struct btrfs_root *root); 2990 2991 /* uuid-tree.c */ 2992 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2993 u64 subid); 2994 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2995 u64 subid); 2996 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2997 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2998 u64)); 2999 3000 /* dir-item.c */ 3001 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3002 const char *name, int name_len); 3003 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 3004 int name_len, struct btrfs_inode *dir, 3005 struct btrfs_key *location, u8 type, u64 index); 3006 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3007 struct btrfs_root *root, 3008 struct btrfs_path *path, u64 dir, 3009 const char *name, int name_len, 3010 int mod); 3011 struct btrfs_dir_item * 3012 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3013 struct btrfs_root *root, 3014 struct btrfs_path *path, u64 dir, 3015 u64 objectid, const char *name, int name_len, 3016 int mod); 3017 struct btrfs_dir_item * 3018 btrfs_search_dir_index_item(struct btrfs_root *root, 3019 struct btrfs_path *path, u64 dirid, 3020 const char *name, int name_len); 3021 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3022 struct btrfs_root *root, 3023 struct btrfs_path *path, 3024 struct btrfs_dir_item *di); 3025 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3026 struct btrfs_root *root, 3027 struct btrfs_path *path, u64 objectid, 3028 const char *name, u16 name_len, 3029 const void *data, u16 data_len); 3030 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3031 struct btrfs_root *root, 3032 struct btrfs_path *path, u64 dir, 3033 const char *name, u16 name_len, 3034 int mod); 3035 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3036 struct btrfs_path *path, 3037 const char *name, 3038 int name_len); 3039 3040 /* orphan.c */ 3041 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3042 struct btrfs_root *root, u64 offset); 3043 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3044 struct btrfs_root *root, u64 offset); 3045 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3046 3047 /* inode-item.c */ 3048 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3049 struct btrfs_root *root, 3050 const char *name, int name_len, 3051 u64 inode_objectid, u64 ref_objectid, u64 index); 3052 int btrfs_del_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_insert_empty_inode(struct btrfs_trans_handle *trans, 3057 struct btrfs_root *root, 3058 struct btrfs_path *path, u64 objectid); 3059 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3060 *root, struct btrfs_path *path, 3061 struct btrfs_key *location, int mod); 3062 3063 struct btrfs_inode_extref * 3064 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3065 struct btrfs_root *root, 3066 struct btrfs_path *path, 3067 const char *name, int name_len, 3068 u64 inode_objectid, u64 ref_objectid, int ins_len, 3069 int cow); 3070 3071 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3072 const char *name, 3073 int name_len, struct btrfs_inode_ref **ref_ret); 3074 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3075 u64 ref_objectid, const char *name, 3076 int name_len, 3077 struct btrfs_inode_extref **extref_ret); 3078 3079 /* file-item.c */ 3080 struct btrfs_dio_private; 3081 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3082 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3083 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 3084 u8 *dst); 3085 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3086 u64 logical_offset); 3087 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3088 struct btrfs_root *root, 3089 u64 objectid, u64 pos, 3090 u64 disk_offset, u64 disk_num_bytes, 3091 u64 num_bytes, u64 offset, u64 ram_bytes, 3092 u8 compression, u8 encryption, u16 other_encoding); 3093 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3094 struct btrfs_root *root, 3095 struct btrfs_path *path, u64 objectid, 3096 u64 bytenr, int mod); 3097 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3098 struct btrfs_root *root, 3099 struct btrfs_ordered_sum *sums); 3100 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3101 u64 file_start, int contig); 3102 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3103 struct list_head *list, int search_commit); 3104 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3105 const struct btrfs_path *path, 3106 struct btrfs_file_extent_item *fi, 3107 const bool new_inline, 3108 struct extent_map *em); 3109 3110 /* inode.c */ 3111 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3112 u64 start, u64 len); 3113 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3114 u64 *orig_start, u64 *orig_block_len, 3115 u64 *ram_bytes); 3116 3117 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3118 struct btrfs_inode *inode); 3119 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3120 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3121 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3122 struct btrfs_root *root, 3123 struct btrfs_inode *dir, struct btrfs_inode *inode, 3124 const char *name, int name_len); 3125 int btrfs_add_link(struct btrfs_trans_handle *trans, 3126 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3127 const char *name, int name_len, int add_backref, u64 index); 3128 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3129 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3130 int front); 3131 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3132 struct btrfs_root *root, 3133 struct inode *inode, u64 new_size, 3134 u32 min_type); 3135 3136 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3137 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3138 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3139 unsigned int extra_bits, 3140 struct extent_state **cached_state, int dedupe); 3141 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3142 struct btrfs_root *new_root, 3143 struct btrfs_root *parent_root, 3144 u64 new_dirid); 3145 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3146 unsigned *bits); 3147 void btrfs_clear_delalloc_extent(struct inode *inode, 3148 struct extent_state *state, unsigned *bits); 3149 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3150 struct extent_state *other); 3151 void btrfs_split_delalloc_extent(struct inode *inode, 3152 struct extent_state *orig, u64 split); 3153 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3154 unsigned long bio_flags); 3155 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3156 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3157 int btrfs_readpage(struct file *file, struct page *page); 3158 void btrfs_evict_inode(struct inode *inode); 3159 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3160 struct inode *btrfs_alloc_inode(struct super_block *sb); 3161 void btrfs_destroy_inode(struct inode *inode); 3162 void btrfs_free_inode(struct inode *inode); 3163 int btrfs_drop_inode(struct inode *inode); 3164 int __init btrfs_init_cachep(void); 3165 void __cold btrfs_destroy_cachep(void); 3166 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 3167 struct btrfs_root *root, int *new, 3168 struct btrfs_path *path); 3169 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3170 struct btrfs_root *root, int *was_new); 3171 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3172 struct page *page, size_t pg_offset, 3173 u64 start, u64 end, int create); 3174 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3175 struct btrfs_root *root, 3176 struct inode *inode); 3177 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3178 struct btrfs_root *root, struct inode *inode); 3179 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3180 struct btrfs_inode *inode); 3181 int btrfs_orphan_cleanup(struct btrfs_root *root); 3182 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3183 void btrfs_add_delayed_iput(struct inode *inode); 3184 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3185 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3186 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3187 u64 start, u64 num_bytes, u64 min_size, 3188 loff_t actual_len, u64 *alloc_hint); 3189 int btrfs_prealloc_file_range_trans(struct inode *inode, 3190 struct btrfs_trans_handle *trans, int mode, 3191 u64 start, u64 num_bytes, u64 min_size, 3192 loff_t actual_len, u64 *alloc_hint); 3193 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 3194 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3195 struct writeback_control *wbc); 3196 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3197 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3198 u64 end, int uptodate); 3199 extern const struct dentry_operations btrfs_dentry_operations; 3200 3201 /* ioctl.c */ 3202 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3203 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3204 int btrfs_ioctl_get_supported_features(void __user *arg); 3205 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3206 int btrfs_is_empty_uuid(u8 *uuid); 3207 int btrfs_defrag_file(struct inode *inode, struct file *file, 3208 struct btrfs_ioctl_defrag_range_args *range, 3209 u64 newer_than, unsigned long max_pages); 3210 void btrfs_get_block_group_info(struct list_head *groups_list, 3211 struct btrfs_ioctl_space_info *space); 3212 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3213 struct btrfs_ioctl_balance_args *bargs); 3214 3215 /* file.c */ 3216 int __init btrfs_auto_defrag_init(void); 3217 void __cold btrfs_auto_defrag_exit(void); 3218 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3219 struct btrfs_inode *inode); 3220 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3221 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3222 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3223 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3224 int skip_pinned); 3225 extern const struct file_operations btrfs_file_operations; 3226 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3227 struct btrfs_root *root, struct inode *inode, 3228 struct btrfs_path *path, u64 start, u64 end, 3229 u64 *drop_end, int drop_cache, 3230 int replace_extent, 3231 u32 extent_item_size, 3232 int *key_inserted); 3233 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3234 struct btrfs_root *root, struct inode *inode, u64 start, 3235 u64 end, int drop_cache); 3236 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3237 struct btrfs_inode *inode, u64 start, u64 end); 3238 int btrfs_release_file(struct inode *inode, struct file *file); 3239 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3240 size_t num_pages, loff_t pos, size_t write_bytes, 3241 struct extent_state **cached); 3242 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3243 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 3244 struct file *file_out, loff_t pos_out, 3245 loff_t len, unsigned int remap_flags); 3246 3247 /* tree-defrag.c */ 3248 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3249 struct btrfs_root *root); 3250 3251 /* sysfs.c */ 3252 int __init btrfs_init_sysfs(void); 3253 void __cold btrfs_exit_sysfs(void); 3254 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3255 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3256 3257 /* super.c */ 3258 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3259 unsigned long new_flags); 3260 int btrfs_sync_fs(struct super_block *sb, int wait); 3261 3262 static inline __printf(2, 3) __cold 3263 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3264 { 3265 } 3266 3267 #ifdef CONFIG_PRINTK 3268 __printf(2, 3) 3269 __cold 3270 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3271 #else 3272 #define btrfs_printk(fs_info, fmt, args...) \ 3273 btrfs_no_printk(fs_info, fmt, ##args) 3274 #endif 3275 3276 #define btrfs_emerg(fs_info, fmt, args...) \ 3277 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3278 #define btrfs_alert(fs_info, fmt, args...) \ 3279 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3280 #define btrfs_crit(fs_info, fmt, args...) \ 3281 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3282 #define btrfs_err(fs_info, fmt, args...) \ 3283 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3284 #define btrfs_warn(fs_info, fmt, args...) \ 3285 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3286 #define btrfs_notice(fs_info, fmt, args...) \ 3287 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3288 #define btrfs_info(fs_info, fmt, args...) \ 3289 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3290 3291 /* 3292 * Wrappers that use printk_in_rcu 3293 */ 3294 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3295 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3296 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3297 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3298 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3299 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3300 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3301 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3302 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3303 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3304 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3305 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3306 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3307 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3308 3309 /* 3310 * Wrappers that use a ratelimited printk_in_rcu 3311 */ 3312 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3313 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3314 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3315 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3316 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3317 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3318 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3319 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3320 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3321 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3322 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3323 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3324 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3326 3327 /* 3328 * Wrappers that use a ratelimited printk 3329 */ 3330 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3331 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3332 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3333 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3334 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3335 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3336 #define btrfs_err_rl(fs_info, fmt, args...) \ 3337 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3338 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3339 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3340 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3341 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3342 #define btrfs_info_rl(fs_info, fmt, args...) \ 3343 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3344 3345 #if defined(CONFIG_DYNAMIC_DEBUG) 3346 #define btrfs_debug(fs_info, fmt, args...) \ 3347 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3348 fs_info, KERN_DEBUG fmt, ##args) 3349 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3350 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3351 fs_info, KERN_DEBUG fmt, ##args) 3352 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3353 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3354 fs_info, KERN_DEBUG fmt, ##args) 3355 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3356 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3357 fs_info, KERN_DEBUG fmt, ##args) 3358 #elif defined(DEBUG) 3359 #define btrfs_debug(fs_info, fmt, args...) \ 3360 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3361 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3362 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3363 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3364 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3365 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3366 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3367 #else 3368 #define btrfs_debug(fs_info, fmt, args...) \ 3369 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3370 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3371 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3372 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3373 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3374 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3375 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3376 #endif 3377 3378 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3379 do { \ 3380 rcu_read_lock(); \ 3381 btrfs_printk(fs_info, fmt, ##args); \ 3382 rcu_read_unlock(); \ 3383 } while (0) 3384 3385 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3386 do { \ 3387 rcu_read_lock(); \ 3388 btrfs_no_printk(fs_info, fmt, ##args); \ 3389 rcu_read_unlock(); \ 3390 } while (0) 3391 3392 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3393 do { \ 3394 static DEFINE_RATELIMIT_STATE(_rs, \ 3395 DEFAULT_RATELIMIT_INTERVAL, \ 3396 DEFAULT_RATELIMIT_BURST); \ 3397 if (__ratelimit(&_rs)) \ 3398 btrfs_printk(fs_info, fmt, ##args); \ 3399 } while (0) 3400 3401 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3402 do { \ 3403 rcu_read_lock(); \ 3404 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3405 rcu_read_unlock(); \ 3406 } while (0) 3407 3408 __cold 3409 static inline void assfail(const char *expr, const char *file, int line) 3410 { 3411 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { 3412 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3413 BUG(); 3414 } 3415 } 3416 3417 #define ASSERT(expr) \ 3418 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3419 3420 /* 3421 * Use that for functions that are conditionally exported for sanity tests but 3422 * otherwise static 3423 */ 3424 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3425 #define EXPORT_FOR_TESTS static 3426 #else 3427 #define EXPORT_FOR_TESTS 3428 #endif 3429 3430 __cold 3431 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3432 { 3433 btrfs_err(fs_info, 3434 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3435 } 3436 3437 __printf(5, 6) 3438 __cold 3439 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3440 unsigned int line, int errno, const char *fmt, ...); 3441 3442 const char *btrfs_decode_error(int errno); 3443 3444 __cold 3445 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3446 const char *function, 3447 unsigned int line, int errno); 3448 3449 /* 3450 * Call btrfs_abort_transaction as early as possible when an error condition is 3451 * detected, that way the exact line number is reported. 3452 */ 3453 #define btrfs_abort_transaction(trans, errno) \ 3454 do { \ 3455 /* Report first abort since mount */ \ 3456 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3457 &((trans)->fs_info->fs_state))) { \ 3458 if ((errno) != -EIO) { \ 3459 WARN(1, KERN_DEBUG \ 3460 "BTRFS: Transaction aborted (error %d)\n", \ 3461 (errno)); \ 3462 } else { \ 3463 btrfs_debug((trans)->fs_info, \ 3464 "Transaction aborted (error %d)", \ 3465 (errno)); \ 3466 } \ 3467 } \ 3468 __btrfs_abort_transaction((trans), __func__, \ 3469 __LINE__, (errno)); \ 3470 } while (0) 3471 3472 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3473 do { \ 3474 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3475 (errno), fmt, ##args); \ 3476 } while (0) 3477 3478 __printf(5, 6) 3479 __cold 3480 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3481 unsigned int line, int errno, const char *fmt, ...); 3482 /* 3483 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3484 * will panic(). Otherwise we BUG() here. 3485 */ 3486 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3487 do { \ 3488 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3489 BUG(); \ 3490 } while (0) 3491 3492 3493 /* compatibility and incompatibility defines */ 3494 3495 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3496 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3497 #opt) 3498 3499 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3500 u64 flag, const char* name) 3501 { 3502 struct btrfs_super_block *disk_super; 3503 u64 features; 3504 3505 disk_super = fs_info->super_copy; 3506 features = btrfs_super_incompat_flags(disk_super); 3507 if (!(features & flag)) { 3508 spin_lock(&fs_info->super_lock); 3509 features = btrfs_super_incompat_flags(disk_super); 3510 if (!(features & flag)) { 3511 features |= flag; 3512 btrfs_set_super_incompat_flags(disk_super, features); 3513 btrfs_info(fs_info, 3514 "setting incompat feature flag for %s (0x%llx)", 3515 name, flag); 3516 } 3517 spin_unlock(&fs_info->super_lock); 3518 } 3519 } 3520 3521 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3522 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3523 #opt) 3524 3525 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3526 u64 flag, const char* name) 3527 { 3528 struct btrfs_super_block *disk_super; 3529 u64 features; 3530 3531 disk_super = fs_info->super_copy; 3532 features = btrfs_super_incompat_flags(disk_super); 3533 if (features & flag) { 3534 spin_lock(&fs_info->super_lock); 3535 features = btrfs_super_incompat_flags(disk_super); 3536 if (features & flag) { 3537 features &= ~flag; 3538 btrfs_set_super_incompat_flags(disk_super, features); 3539 btrfs_info(fs_info, 3540 "clearing incompat feature flag for %s (0x%llx)", 3541 name, flag); 3542 } 3543 spin_unlock(&fs_info->super_lock); 3544 } 3545 } 3546 3547 #define btrfs_fs_incompat(fs_info, opt) \ 3548 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3549 3550 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3551 { 3552 struct btrfs_super_block *disk_super; 3553 disk_super = fs_info->super_copy; 3554 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3555 } 3556 3557 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3558 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3559 #opt) 3560 3561 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3562 u64 flag, const char *name) 3563 { 3564 struct btrfs_super_block *disk_super; 3565 u64 features; 3566 3567 disk_super = fs_info->super_copy; 3568 features = btrfs_super_compat_ro_flags(disk_super); 3569 if (!(features & flag)) { 3570 spin_lock(&fs_info->super_lock); 3571 features = btrfs_super_compat_ro_flags(disk_super); 3572 if (!(features & flag)) { 3573 features |= flag; 3574 btrfs_set_super_compat_ro_flags(disk_super, features); 3575 btrfs_info(fs_info, 3576 "setting compat-ro feature flag for %s (0x%llx)", 3577 name, flag); 3578 } 3579 spin_unlock(&fs_info->super_lock); 3580 } 3581 } 3582 3583 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3584 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3585 #opt) 3586 3587 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3588 u64 flag, const char *name) 3589 { 3590 struct btrfs_super_block *disk_super; 3591 u64 features; 3592 3593 disk_super = fs_info->super_copy; 3594 features = btrfs_super_compat_ro_flags(disk_super); 3595 if (features & flag) { 3596 spin_lock(&fs_info->super_lock); 3597 features = btrfs_super_compat_ro_flags(disk_super); 3598 if (features & flag) { 3599 features &= ~flag; 3600 btrfs_set_super_compat_ro_flags(disk_super, features); 3601 btrfs_info(fs_info, 3602 "clearing compat-ro feature flag for %s (0x%llx)", 3603 name, flag); 3604 } 3605 spin_unlock(&fs_info->super_lock); 3606 } 3607 } 3608 3609 #define btrfs_fs_compat_ro(fs_info, opt) \ 3610 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3611 3612 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3613 { 3614 struct btrfs_super_block *disk_super; 3615 disk_super = fs_info->super_copy; 3616 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3617 } 3618 3619 /* acl.c */ 3620 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3621 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3622 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3623 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3624 struct inode *inode, struct inode *dir); 3625 #else 3626 #define btrfs_get_acl NULL 3627 #define btrfs_set_acl NULL 3628 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3629 struct inode *inode, struct inode *dir) 3630 { 3631 return 0; 3632 } 3633 #endif 3634 3635 /* relocation.c */ 3636 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3637 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3638 struct btrfs_root *root); 3639 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3640 struct btrfs_root *root); 3641 int btrfs_recover_relocation(struct btrfs_root *root); 3642 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3643 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3644 struct btrfs_root *root, struct extent_buffer *buf, 3645 struct extent_buffer *cow); 3646 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3647 u64 *bytes_to_reserve); 3648 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3649 struct btrfs_pending_snapshot *pending); 3650 3651 /* scrub.c */ 3652 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3653 u64 end, struct btrfs_scrub_progress *progress, 3654 int readonly, int is_dev_replace); 3655 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3656 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3657 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3658 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3659 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3660 struct btrfs_scrub_progress *progress); 3661 static inline void btrfs_init_full_stripe_locks_tree( 3662 struct btrfs_full_stripe_locks_tree *locks_root) 3663 { 3664 locks_root->root = RB_ROOT; 3665 mutex_init(&locks_root->lock); 3666 } 3667 3668 /* dev-replace.c */ 3669 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3670 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3671 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3672 3673 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3674 { 3675 btrfs_bio_counter_sub(fs_info, 1); 3676 } 3677 3678 /* reada.c */ 3679 struct reada_control { 3680 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3681 struct btrfs_key key_start; 3682 struct btrfs_key key_end; /* exclusive */ 3683 atomic_t elems; 3684 struct kref refcnt; 3685 wait_queue_head_t wait; 3686 }; 3687 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3688 struct btrfs_key *start, struct btrfs_key *end); 3689 int btrfs_reada_wait(void *handle); 3690 void btrfs_reada_detach(void *handle); 3691 int btree_readahead_hook(struct extent_buffer *eb, int err); 3692 3693 static inline int is_fstree(u64 rootid) 3694 { 3695 if (rootid == BTRFS_FS_TREE_OBJECTID || 3696 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3697 !btrfs_qgroup_level(rootid))) 3698 return 1; 3699 return 0; 3700 } 3701 3702 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3703 { 3704 return signal_pending(current); 3705 } 3706 3707 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3708 3709 /* Sanity test specific functions */ 3710 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3711 void btrfs_test_inode_set_ops(struct inode *inode); 3712 void btrfs_test_destroy_inode(struct inode *inode); 3713 3714 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3715 { 3716 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3717 } 3718 #else 3719 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3720 { 3721 return 0; 3722 } 3723 #endif 3724 3725 static inline void cond_wake_up(struct wait_queue_head *wq) 3726 { 3727 /* 3728 * This implies a full smp_mb barrier, see comments for 3729 * waitqueue_active why. 3730 */ 3731 if (wq_has_sleeper(wq)) 3732 wake_up(wq); 3733 } 3734 3735 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3736 { 3737 /* 3738 * Special case for conditional wakeup where the barrier required for 3739 * waitqueue_active is implied by some of the preceding code. Eg. one 3740 * of such atomic operations (atomic_dec_and_return, ...), or a 3741 * unlock/lock sequence, etc. 3742 */ 3743 if (waitqueue_active(wq)) 3744 wake_up(wq); 3745 } 3746 3747 #endif 3748