1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <linux/kobject.h> 20 #include <trace/events/btrfs.h> 21 #include <asm/kmap_types.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 35 struct btrfs_trans_handle; 36 struct btrfs_transaction; 37 struct btrfs_pending_snapshot; 38 extern struct kmem_cache *btrfs_trans_handle_cachep; 39 extern struct kmem_cache *btrfs_bit_radix_cachep; 40 extern struct kmem_cache *btrfs_path_cachep; 41 extern struct kmem_cache *btrfs_free_space_cachep; 42 struct btrfs_ordered_sum; 43 44 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 45 #define STATIC noinline 46 #else 47 #define STATIC static noinline 48 #endif 49 50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 51 52 #define BTRFS_MAX_MIRRORS 3 53 54 #define BTRFS_MAX_LEVEL 8 55 56 #define BTRFS_OLDEST_GENERATION 0ULL 57 58 /* 59 * the max metadata block size. This limit is somewhat artificial, 60 * but the memmove costs go through the roof for larger blocks. 61 */ 62 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 63 64 /* 65 * we can actually store much bigger names, but lets not confuse the rest 66 * of linux 67 */ 68 #define BTRFS_NAME_LEN 255 69 70 /* 71 * Theoretical limit is larger, but we keep this down to a sane 72 * value. That should limit greatly the possibility of collisions on 73 * inode ref items. 74 */ 75 #define BTRFS_LINK_MAX 65535U 76 77 /* four bytes for CRC32 */ 78 static const int btrfs_csum_sizes[] = { 4 }; 79 80 #define BTRFS_EMPTY_DIR_SIZE 0 81 82 /* ioprio of readahead is set to idle */ 83 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 84 85 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 86 87 /* 88 * Use large batch size to reduce overhead of metadata updates. On the reader 89 * side, we only read it when we are close to ENOSPC and the read overhead is 90 * mostly related to the number of CPUs, so it is OK to use arbitrary large 91 * value here. 92 */ 93 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 94 95 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 96 97 98 /* 99 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 100 */ 101 static inline u32 count_max_extents(u64 size) 102 { 103 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 104 } 105 106 struct btrfs_mapping_tree { 107 struct extent_map_tree map_tree; 108 }; 109 110 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 111 { 112 BUG_ON(num_stripes == 0); 113 return sizeof(struct btrfs_chunk) + 114 sizeof(struct btrfs_stripe) * (num_stripes - 1); 115 } 116 117 /* 118 * File system states 119 */ 120 #define BTRFS_FS_STATE_ERROR 0 121 #define BTRFS_FS_STATE_REMOUNTING 1 122 #define BTRFS_FS_STATE_TRANS_ABORTED 2 123 #define BTRFS_FS_STATE_DEV_REPLACING 3 124 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 125 126 #define BTRFS_BACKREF_REV_MAX 256 127 #define BTRFS_BACKREF_REV_SHIFT 56 128 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 129 BTRFS_BACKREF_REV_SHIFT) 130 131 #define BTRFS_OLD_BACKREF_REV 0 132 #define BTRFS_MIXED_BACKREF_REV 1 133 134 /* 135 * every tree block (leaf or node) starts with this header. 136 */ 137 struct btrfs_header { 138 /* these first four must match the super block */ 139 u8 csum[BTRFS_CSUM_SIZE]; 140 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 141 __le64 bytenr; /* which block this node is supposed to live in */ 142 __le64 flags; 143 144 /* allowed to be different from the super from here on down */ 145 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 146 __le64 generation; 147 __le64 owner; 148 __le32 nritems; 149 u8 level; 150 } __attribute__ ((__packed__)); 151 152 /* 153 * this is a very generous portion of the super block, giving us 154 * room to translate 14 chunks with 3 stripes each. 155 */ 156 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 157 158 /* 159 * just in case we somehow lose the roots and are not able to mount, 160 * we store an array of the roots from previous transactions 161 * in the super. 162 */ 163 #define BTRFS_NUM_BACKUP_ROOTS 4 164 struct btrfs_root_backup { 165 __le64 tree_root; 166 __le64 tree_root_gen; 167 168 __le64 chunk_root; 169 __le64 chunk_root_gen; 170 171 __le64 extent_root; 172 __le64 extent_root_gen; 173 174 __le64 fs_root; 175 __le64 fs_root_gen; 176 177 __le64 dev_root; 178 __le64 dev_root_gen; 179 180 __le64 csum_root; 181 __le64 csum_root_gen; 182 183 __le64 total_bytes; 184 __le64 bytes_used; 185 __le64 num_devices; 186 /* future */ 187 __le64 unused_64[4]; 188 189 u8 tree_root_level; 190 u8 chunk_root_level; 191 u8 extent_root_level; 192 u8 fs_root_level; 193 u8 dev_root_level; 194 u8 csum_root_level; 195 /* future and to align */ 196 u8 unused_8[10]; 197 } __attribute__ ((__packed__)); 198 199 /* 200 * the super block basically lists the main trees of the FS 201 * it currently lacks any block count etc etc 202 */ 203 struct btrfs_super_block { 204 u8 csum[BTRFS_CSUM_SIZE]; 205 /* the first 4 fields must match struct btrfs_header */ 206 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 207 __le64 bytenr; /* this block number */ 208 __le64 flags; 209 210 /* allowed to be different from the btrfs_header from here own down */ 211 __le64 magic; 212 __le64 generation; 213 __le64 root; 214 __le64 chunk_root; 215 __le64 log_root; 216 217 /* this will help find the new super based on the log root */ 218 __le64 log_root_transid; 219 __le64 total_bytes; 220 __le64 bytes_used; 221 __le64 root_dir_objectid; 222 __le64 num_devices; 223 __le32 sectorsize; 224 __le32 nodesize; 225 __le32 __unused_leafsize; 226 __le32 stripesize; 227 __le32 sys_chunk_array_size; 228 __le64 chunk_root_generation; 229 __le64 compat_flags; 230 __le64 compat_ro_flags; 231 __le64 incompat_flags; 232 __le16 csum_type; 233 u8 root_level; 234 u8 chunk_root_level; 235 u8 log_root_level; 236 struct btrfs_dev_item dev_item; 237 238 char label[BTRFS_LABEL_SIZE]; 239 240 __le64 cache_generation; 241 __le64 uuid_tree_generation; 242 243 /* future expansion */ 244 __le64 reserved[30]; 245 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 246 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 247 } __attribute__ ((__packed__)); 248 249 /* 250 * Compat flags that we support. If any incompat flags are set other than the 251 * ones specified below then we will fail to mount 252 */ 253 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 254 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 255 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 256 257 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 258 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 259 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 260 261 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 262 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 263 264 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 265 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 266 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 267 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 268 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 269 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 270 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 271 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 272 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 273 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 274 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 275 276 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 277 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 278 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 279 280 /* 281 * A leaf is full of items. offset and size tell us where to find 282 * the item in the leaf (relative to the start of the data area) 283 */ 284 struct btrfs_item { 285 struct btrfs_disk_key key; 286 __le32 offset; 287 __le32 size; 288 } __attribute__ ((__packed__)); 289 290 /* 291 * leaves have an item area and a data area: 292 * [item0, item1....itemN] [free space] [dataN...data1, data0] 293 * 294 * The data is separate from the items to get the keys closer together 295 * during searches. 296 */ 297 struct btrfs_leaf { 298 struct btrfs_header header; 299 struct btrfs_item items[]; 300 } __attribute__ ((__packed__)); 301 302 /* 303 * all non-leaf blocks are nodes, they hold only keys and pointers to 304 * other blocks 305 */ 306 struct btrfs_key_ptr { 307 struct btrfs_disk_key key; 308 __le64 blockptr; 309 __le64 generation; 310 } __attribute__ ((__packed__)); 311 312 struct btrfs_node { 313 struct btrfs_header header; 314 struct btrfs_key_ptr ptrs[]; 315 } __attribute__ ((__packed__)); 316 317 /* 318 * btrfs_paths remember the path taken from the root down to the leaf. 319 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 320 * to any other levels that are present. 321 * 322 * The slots array records the index of the item or block pointer 323 * used while walking the tree. 324 */ 325 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 326 struct btrfs_path { 327 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 328 int slots[BTRFS_MAX_LEVEL]; 329 /* if there is real range locking, this locks field will change */ 330 u8 locks[BTRFS_MAX_LEVEL]; 331 u8 reada; 332 /* keep some upper locks as we walk down */ 333 u8 lowest_level; 334 335 /* 336 * set by btrfs_split_item, tells search_slot to keep all locks 337 * and to force calls to keep space in the nodes 338 */ 339 unsigned int search_for_split:1; 340 unsigned int keep_locks:1; 341 unsigned int skip_locking:1; 342 unsigned int leave_spinning:1; 343 unsigned int search_commit_root:1; 344 unsigned int need_commit_sem:1; 345 unsigned int skip_release_on_error:1; 346 }; 347 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 348 sizeof(struct btrfs_item)) 349 struct btrfs_dev_replace { 350 u64 replace_state; /* see #define above */ 351 time64_t time_started; /* seconds since 1-Jan-1970 */ 352 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 353 atomic64_t num_write_errors; 354 atomic64_t num_uncorrectable_read_errors; 355 356 u64 cursor_left; 357 u64 committed_cursor_left; 358 u64 cursor_left_last_write_of_item; 359 u64 cursor_right; 360 361 u64 cont_reading_from_srcdev_mode; /* see #define above */ 362 363 int is_valid; 364 int item_needs_writeback; 365 struct btrfs_device *srcdev; 366 struct btrfs_device *tgtdev; 367 368 struct mutex lock_finishing_cancel_unmount; 369 rwlock_t lock; 370 atomic_t read_locks; 371 atomic_t blocking_readers; 372 wait_queue_head_t read_lock_wq; 373 374 struct btrfs_scrub_progress scrub_progress; 375 }; 376 377 /* For raid type sysfs entries */ 378 struct raid_kobject { 379 u64 flags; 380 struct kobject kobj; 381 struct list_head list; 382 }; 383 384 struct btrfs_space_info { 385 spinlock_t lock; 386 387 u64 total_bytes; /* total bytes in the space, 388 this doesn't take mirrors into account */ 389 u64 bytes_used; /* total bytes used, 390 this doesn't take mirrors into account */ 391 u64 bytes_pinned; /* total bytes pinned, will be freed when the 392 transaction finishes */ 393 u64 bytes_reserved; /* total bytes the allocator has reserved for 394 current allocations */ 395 u64 bytes_may_use; /* number of bytes that may be used for 396 delalloc/allocations */ 397 u64 bytes_readonly; /* total bytes that are read only */ 398 399 u64 max_extent_size; /* This will hold the maximum extent size of 400 the space info if we had an ENOSPC in the 401 allocator. */ 402 403 unsigned int full:1; /* indicates that we cannot allocate any more 404 chunks for this space */ 405 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 406 407 unsigned int flush:1; /* set if we are trying to make space */ 408 409 unsigned int force_alloc; /* set if we need to force a chunk 410 alloc for this space */ 411 412 u64 disk_used; /* total bytes used on disk */ 413 u64 disk_total; /* total bytes on disk, takes mirrors into 414 account */ 415 416 u64 flags; 417 418 /* 419 * bytes_pinned is kept in line with what is actually pinned, as in 420 * we've called update_block_group and dropped the bytes_used counter 421 * and increased the bytes_pinned counter. However this means that 422 * bytes_pinned does not reflect the bytes that will be pinned once the 423 * delayed refs are flushed, so this counter is inc'ed every time we 424 * call btrfs_free_extent so it is a realtime count of what will be 425 * freed once the transaction is committed. It will be zeroed every 426 * time the transaction commits. 427 */ 428 struct percpu_counter total_bytes_pinned; 429 430 struct list_head list; 431 /* Protected by the spinlock 'lock'. */ 432 struct list_head ro_bgs; 433 struct list_head priority_tickets; 434 struct list_head tickets; 435 /* 436 * tickets_id just indicates the next ticket will be handled, so note 437 * it's not stored per ticket. 438 */ 439 u64 tickets_id; 440 441 struct rw_semaphore groups_sem; 442 /* for block groups in our same type */ 443 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 444 wait_queue_head_t wait; 445 446 struct kobject kobj; 447 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 448 }; 449 450 #define BTRFS_BLOCK_RSV_GLOBAL 1 451 #define BTRFS_BLOCK_RSV_DELALLOC 2 452 #define BTRFS_BLOCK_RSV_TRANS 3 453 #define BTRFS_BLOCK_RSV_CHUNK 4 454 #define BTRFS_BLOCK_RSV_DELOPS 5 455 #define BTRFS_BLOCK_RSV_EMPTY 6 456 #define BTRFS_BLOCK_RSV_TEMP 7 457 458 struct btrfs_block_rsv { 459 u64 size; 460 u64 reserved; 461 struct btrfs_space_info *space_info; 462 spinlock_t lock; 463 unsigned short full; 464 unsigned short type; 465 unsigned short failfast; 466 467 /* 468 * Qgroup equivalent for @size @reserved 469 * 470 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 471 * about things like csum size nor how many tree blocks it will need to 472 * reserve. 473 * 474 * Qgroup cares more about net change of the extent usage. 475 * 476 * So for one newly inserted file extent, in worst case it will cause 477 * leaf split and level increase, nodesize for each file extent is 478 * already too much. 479 * 480 * In short, qgroup_size/reserved is the upper limit of possible needed 481 * qgroup metadata reservation. 482 */ 483 u64 qgroup_rsv_size; 484 u64 qgroup_rsv_reserved; 485 }; 486 487 /* 488 * free clusters are used to claim free space in relatively large chunks, 489 * allowing us to do less seeky writes. They are used for all metadata 490 * allocations. In ssd_spread mode they are also used for data allocations. 491 */ 492 struct btrfs_free_cluster { 493 spinlock_t lock; 494 spinlock_t refill_lock; 495 struct rb_root root; 496 497 /* largest extent in this cluster */ 498 u64 max_size; 499 500 /* first extent starting offset */ 501 u64 window_start; 502 503 /* We did a full search and couldn't create a cluster */ 504 bool fragmented; 505 506 struct btrfs_block_group_cache *block_group; 507 /* 508 * when a cluster is allocated from a block group, we put the 509 * cluster onto a list in the block group so that it can 510 * be freed before the block group is freed. 511 */ 512 struct list_head block_group_list; 513 }; 514 515 enum btrfs_caching_type { 516 BTRFS_CACHE_NO = 0, 517 BTRFS_CACHE_STARTED = 1, 518 BTRFS_CACHE_FAST = 2, 519 BTRFS_CACHE_FINISHED = 3, 520 BTRFS_CACHE_ERROR = 4, 521 }; 522 523 enum btrfs_disk_cache_state { 524 BTRFS_DC_WRITTEN = 0, 525 BTRFS_DC_ERROR = 1, 526 BTRFS_DC_CLEAR = 2, 527 BTRFS_DC_SETUP = 3, 528 }; 529 530 struct btrfs_caching_control { 531 struct list_head list; 532 struct mutex mutex; 533 wait_queue_head_t wait; 534 struct btrfs_work work; 535 struct btrfs_block_group_cache *block_group; 536 u64 progress; 537 refcount_t count; 538 }; 539 540 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 541 #define CACHING_CTL_WAKE_UP SZ_2M 542 543 struct btrfs_io_ctl { 544 void *cur, *orig; 545 struct page *page; 546 struct page **pages; 547 struct btrfs_fs_info *fs_info; 548 struct inode *inode; 549 unsigned long size; 550 int index; 551 int num_pages; 552 int entries; 553 int bitmaps; 554 unsigned check_crcs:1; 555 }; 556 557 /* 558 * Tree to record all locked full stripes of a RAID5/6 block group 559 */ 560 struct btrfs_full_stripe_locks_tree { 561 struct rb_root root; 562 struct mutex lock; 563 }; 564 565 struct btrfs_block_group_cache { 566 struct btrfs_key key; 567 struct btrfs_block_group_item item; 568 struct btrfs_fs_info *fs_info; 569 struct inode *inode; 570 spinlock_t lock; 571 u64 pinned; 572 u64 reserved; 573 u64 delalloc_bytes; 574 u64 bytes_super; 575 u64 flags; 576 u64 cache_generation; 577 578 /* 579 * If the free space extent count exceeds this number, convert the block 580 * group to bitmaps. 581 */ 582 u32 bitmap_high_thresh; 583 584 /* 585 * If the free space extent count drops below this number, convert the 586 * block group back to extents. 587 */ 588 u32 bitmap_low_thresh; 589 590 /* 591 * It is just used for the delayed data space allocation because 592 * only the data space allocation and the relative metadata update 593 * can be done cross the transaction. 594 */ 595 struct rw_semaphore data_rwsem; 596 597 /* for raid56, this is a full stripe, without parity */ 598 unsigned long full_stripe_len; 599 600 unsigned int ro; 601 unsigned int iref:1; 602 unsigned int has_caching_ctl:1; 603 unsigned int removed:1; 604 605 int disk_cache_state; 606 607 /* cache tracking stuff */ 608 int cached; 609 struct btrfs_caching_control *caching_ctl; 610 u64 last_byte_to_unpin; 611 612 struct btrfs_space_info *space_info; 613 614 /* free space cache stuff */ 615 struct btrfs_free_space_ctl *free_space_ctl; 616 617 /* block group cache stuff */ 618 struct rb_node cache_node; 619 620 /* for block groups in the same raid type */ 621 struct list_head list; 622 623 /* usage count */ 624 atomic_t count; 625 626 /* List of struct btrfs_free_clusters for this block group. 627 * Today it will only have one thing on it, but that may change 628 */ 629 struct list_head cluster_list; 630 631 /* For delayed block group creation or deletion of empty block groups */ 632 struct list_head bg_list; 633 634 /* For read-only block groups */ 635 struct list_head ro_list; 636 637 atomic_t trimming; 638 639 /* For dirty block groups */ 640 struct list_head dirty_list; 641 struct list_head io_list; 642 643 struct btrfs_io_ctl io_ctl; 644 645 /* 646 * Incremented when doing extent allocations and holding a read lock 647 * on the space_info's groups_sem semaphore. 648 * Decremented when an ordered extent that represents an IO against this 649 * block group's range is created (after it's added to its inode's 650 * root's list of ordered extents) or immediately after the allocation 651 * if it's a metadata extent or fallocate extent (for these cases we 652 * don't create ordered extents). 653 */ 654 atomic_t reservations; 655 656 /* 657 * Incremented while holding the spinlock *lock* by a task checking if 658 * it can perform a nocow write (incremented if the value for the *ro* 659 * field is 0). Decremented by such tasks once they create an ordered 660 * extent or before that if some error happens before reaching that step. 661 * This is to prevent races between block group relocation and nocow 662 * writes through direct IO. 663 */ 664 atomic_t nocow_writers; 665 666 /* Lock for free space tree operations. */ 667 struct mutex free_space_lock; 668 669 /* 670 * Does the block group need to be added to the free space tree? 671 * Protected by free_space_lock. 672 */ 673 int needs_free_space; 674 675 /* Record locked full stripes for RAID5/6 block group */ 676 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 677 }; 678 679 /* delayed seq elem */ 680 struct seq_list { 681 struct list_head list; 682 u64 seq; 683 }; 684 685 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 686 687 #define SEQ_LAST ((u64)-1) 688 689 enum btrfs_orphan_cleanup_state { 690 ORPHAN_CLEANUP_STARTED = 1, 691 ORPHAN_CLEANUP_DONE = 2, 692 }; 693 694 /* used by the raid56 code to lock stripes for read/modify/write */ 695 struct btrfs_stripe_hash { 696 struct list_head hash_list; 697 spinlock_t lock; 698 }; 699 700 /* used by the raid56 code to lock stripes for read/modify/write */ 701 struct btrfs_stripe_hash_table { 702 struct list_head stripe_cache; 703 spinlock_t cache_lock; 704 int cache_size; 705 struct btrfs_stripe_hash table[]; 706 }; 707 708 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 709 710 void btrfs_init_async_reclaim_work(struct work_struct *work); 711 712 /* fs_info */ 713 struct reloc_control; 714 struct btrfs_device; 715 struct btrfs_fs_devices; 716 struct btrfs_balance_control; 717 struct btrfs_delayed_root; 718 719 #define BTRFS_FS_BARRIER 1 720 #define BTRFS_FS_CLOSING_START 2 721 #define BTRFS_FS_CLOSING_DONE 3 722 #define BTRFS_FS_LOG_RECOVERING 4 723 #define BTRFS_FS_OPEN 5 724 #define BTRFS_FS_QUOTA_ENABLED 6 725 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 726 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 727 #define BTRFS_FS_BTREE_ERR 11 728 #define BTRFS_FS_LOG1_ERR 12 729 #define BTRFS_FS_LOG2_ERR 13 730 #define BTRFS_FS_QUOTA_OVERRIDE 14 731 /* Used to record internally whether fs has been frozen */ 732 #define BTRFS_FS_FROZEN 15 733 734 /* 735 * Indicate that a whole-filesystem exclusive operation is running 736 * (device replace, resize, device add/delete, balance) 737 */ 738 #define BTRFS_FS_EXCL_OP 16 739 740 /* 741 * To info transaction_kthread we need an immediate commit so it doesn't 742 * need to wait for commit_interval 743 */ 744 #define BTRFS_FS_NEED_ASYNC_COMMIT 17 745 746 /* 747 * Indicate that balance has been set up from the ioctl and is in the main 748 * phase. The fs_info::balance_ctl is initialized. 749 */ 750 #define BTRFS_FS_BALANCE_RUNNING 18 751 752 struct btrfs_fs_info { 753 u8 fsid[BTRFS_FSID_SIZE]; 754 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 755 unsigned long flags; 756 struct btrfs_root *extent_root; 757 struct btrfs_root *tree_root; 758 struct btrfs_root *chunk_root; 759 struct btrfs_root *dev_root; 760 struct btrfs_root *fs_root; 761 struct btrfs_root *csum_root; 762 struct btrfs_root *quota_root; 763 struct btrfs_root *uuid_root; 764 struct btrfs_root *free_space_root; 765 766 /* the log root tree is a directory of all the other log roots */ 767 struct btrfs_root *log_root_tree; 768 769 spinlock_t fs_roots_radix_lock; 770 struct radix_tree_root fs_roots_radix; 771 772 /* block group cache stuff */ 773 spinlock_t block_group_cache_lock; 774 u64 first_logical_byte; 775 struct rb_root block_group_cache_tree; 776 777 /* keep track of unallocated space */ 778 atomic64_t free_chunk_space; 779 780 struct extent_io_tree freed_extents[2]; 781 struct extent_io_tree *pinned_extents; 782 783 /* logical->physical extent mapping */ 784 struct btrfs_mapping_tree mapping_tree; 785 786 /* 787 * block reservation for extent, checksum, root tree and 788 * delayed dir index item 789 */ 790 struct btrfs_block_rsv global_block_rsv; 791 /* block reservation for metadata operations */ 792 struct btrfs_block_rsv trans_block_rsv; 793 /* block reservation for chunk tree */ 794 struct btrfs_block_rsv chunk_block_rsv; 795 /* block reservation for delayed operations */ 796 struct btrfs_block_rsv delayed_block_rsv; 797 798 struct btrfs_block_rsv empty_block_rsv; 799 800 u64 generation; 801 u64 last_trans_committed; 802 u64 avg_delayed_ref_runtime; 803 804 /* 805 * this is updated to the current trans every time a full commit 806 * is required instead of the faster short fsync log commits 807 */ 808 u64 last_trans_log_full_commit; 809 unsigned long mount_opt; 810 /* 811 * Track requests for actions that need to be done during transaction 812 * commit (like for some mount options). 813 */ 814 unsigned long pending_changes; 815 unsigned long compress_type:4; 816 unsigned int compress_level; 817 u32 commit_interval; 818 /* 819 * It is a suggestive number, the read side is safe even it gets a 820 * wrong number because we will write out the data into a regular 821 * extent. The write side(mount/remount) is under ->s_umount lock, 822 * so it is also safe. 823 */ 824 u64 max_inline; 825 826 struct btrfs_transaction *running_transaction; 827 wait_queue_head_t transaction_throttle; 828 wait_queue_head_t transaction_wait; 829 wait_queue_head_t transaction_blocked_wait; 830 wait_queue_head_t async_submit_wait; 831 832 /* 833 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 834 * when they are updated. 835 * 836 * Because we do not clear the flags for ever, so we needn't use 837 * the lock on the read side. 838 * 839 * We also needn't use the lock when we mount the fs, because 840 * there is no other task which will update the flag. 841 */ 842 spinlock_t super_lock; 843 struct btrfs_super_block *super_copy; 844 struct btrfs_super_block *super_for_commit; 845 struct super_block *sb; 846 struct inode *btree_inode; 847 struct mutex tree_log_mutex; 848 struct mutex transaction_kthread_mutex; 849 struct mutex cleaner_mutex; 850 struct mutex chunk_mutex; 851 852 /* 853 * this is taken to make sure we don't set block groups ro after 854 * the free space cache has been allocated on them 855 */ 856 struct mutex ro_block_group_mutex; 857 858 /* this is used during read/modify/write to make sure 859 * no two ios are trying to mod the same stripe at the same 860 * time 861 */ 862 struct btrfs_stripe_hash_table *stripe_hash_table; 863 864 /* 865 * this protects the ordered operations list only while we are 866 * processing all of the entries on it. This way we make 867 * sure the commit code doesn't find the list temporarily empty 868 * because another function happens to be doing non-waiting preflush 869 * before jumping into the main commit. 870 */ 871 struct mutex ordered_operations_mutex; 872 873 struct rw_semaphore commit_root_sem; 874 875 struct rw_semaphore cleanup_work_sem; 876 877 struct rw_semaphore subvol_sem; 878 struct srcu_struct subvol_srcu; 879 880 spinlock_t trans_lock; 881 /* 882 * the reloc mutex goes with the trans lock, it is taken 883 * during commit to protect us from the relocation code 884 */ 885 struct mutex reloc_mutex; 886 887 struct list_head trans_list; 888 struct list_head dead_roots; 889 struct list_head caching_block_groups; 890 891 spinlock_t delayed_iput_lock; 892 struct list_head delayed_iputs; 893 struct mutex cleaner_delayed_iput_mutex; 894 895 /* this protects tree_mod_seq_list */ 896 spinlock_t tree_mod_seq_lock; 897 atomic64_t tree_mod_seq; 898 struct list_head tree_mod_seq_list; 899 900 /* this protects tree_mod_log */ 901 rwlock_t tree_mod_log_lock; 902 struct rb_root tree_mod_log; 903 904 atomic_t async_delalloc_pages; 905 906 /* 907 * this is used to protect the following list -- ordered_roots. 908 */ 909 spinlock_t ordered_root_lock; 910 911 /* 912 * all fs/file tree roots in which there are data=ordered extents 913 * pending writeback are added into this list. 914 * 915 * these can span multiple transactions and basically include 916 * every dirty data page that isn't from nodatacow 917 */ 918 struct list_head ordered_roots; 919 920 struct mutex delalloc_root_mutex; 921 spinlock_t delalloc_root_lock; 922 /* all fs/file tree roots that have delalloc inodes. */ 923 struct list_head delalloc_roots; 924 925 /* 926 * there is a pool of worker threads for checksumming during writes 927 * and a pool for checksumming after reads. This is because readers 928 * can run with FS locks held, and the writers may be waiting for 929 * those locks. We don't want ordering in the pending list to cause 930 * deadlocks, and so the two are serviced separately. 931 * 932 * A third pool does submit_bio to avoid deadlocking with the other 933 * two 934 */ 935 struct btrfs_workqueue *workers; 936 struct btrfs_workqueue *delalloc_workers; 937 struct btrfs_workqueue *flush_workers; 938 struct btrfs_workqueue *endio_workers; 939 struct btrfs_workqueue *endio_meta_workers; 940 struct btrfs_workqueue *endio_raid56_workers; 941 struct btrfs_workqueue *endio_repair_workers; 942 struct btrfs_workqueue *rmw_workers; 943 struct btrfs_workqueue *endio_meta_write_workers; 944 struct btrfs_workqueue *endio_write_workers; 945 struct btrfs_workqueue *endio_freespace_worker; 946 struct btrfs_workqueue *submit_workers; 947 struct btrfs_workqueue *caching_workers; 948 struct btrfs_workqueue *readahead_workers; 949 950 /* 951 * fixup workers take dirty pages that didn't properly go through 952 * the cow mechanism and make them safe to write. It happens 953 * for the sys_munmap function call path 954 */ 955 struct btrfs_workqueue *fixup_workers; 956 struct btrfs_workqueue *delayed_workers; 957 958 /* the extent workers do delayed refs on the extent allocation tree */ 959 struct btrfs_workqueue *extent_workers; 960 struct task_struct *transaction_kthread; 961 struct task_struct *cleaner_kthread; 962 u32 thread_pool_size; 963 964 struct kobject *space_info_kobj; 965 struct list_head pending_raid_kobjs; 966 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 967 968 u64 total_pinned; 969 970 /* used to keep from writing metadata until there is a nice batch */ 971 struct percpu_counter dirty_metadata_bytes; 972 struct percpu_counter delalloc_bytes; 973 s32 dirty_metadata_batch; 974 s32 delalloc_batch; 975 976 struct list_head dirty_cowonly_roots; 977 978 struct btrfs_fs_devices *fs_devices; 979 980 /* 981 * The space_info list is effectively read only after initial 982 * setup. It is populated at mount time and cleaned up after 983 * all block groups are removed. RCU is used to protect it. 984 */ 985 struct list_head space_info; 986 987 struct btrfs_space_info *data_sinfo; 988 989 struct reloc_control *reloc_ctl; 990 991 /* data_alloc_cluster is only used in ssd_spread mode */ 992 struct btrfs_free_cluster data_alloc_cluster; 993 994 /* all metadata allocations go through this cluster */ 995 struct btrfs_free_cluster meta_alloc_cluster; 996 997 /* auto defrag inodes go here */ 998 spinlock_t defrag_inodes_lock; 999 struct rb_root defrag_inodes; 1000 atomic_t defrag_running; 1001 1002 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 1003 seqlock_t profiles_lock; 1004 /* 1005 * these three are in extended format (availability of single 1006 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 1007 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 1008 */ 1009 u64 avail_data_alloc_bits; 1010 u64 avail_metadata_alloc_bits; 1011 u64 avail_system_alloc_bits; 1012 1013 /* restriper state */ 1014 spinlock_t balance_lock; 1015 struct mutex balance_mutex; 1016 atomic_t balance_pause_req; 1017 atomic_t balance_cancel_req; 1018 struct btrfs_balance_control *balance_ctl; 1019 wait_queue_head_t balance_wait_q; 1020 1021 u32 data_chunk_allocations; 1022 u32 metadata_ratio; 1023 1024 void *bdev_holder; 1025 1026 /* private scrub information */ 1027 struct mutex scrub_lock; 1028 atomic_t scrubs_running; 1029 atomic_t scrub_pause_req; 1030 atomic_t scrubs_paused; 1031 atomic_t scrub_cancel_req; 1032 wait_queue_head_t scrub_pause_wait; 1033 int scrub_workers_refcnt; 1034 struct btrfs_workqueue *scrub_workers; 1035 struct btrfs_workqueue *scrub_wr_completion_workers; 1036 struct btrfs_workqueue *scrub_nocow_workers; 1037 struct btrfs_workqueue *scrub_parity_workers; 1038 1039 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1040 u32 check_integrity_print_mask; 1041 #endif 1042 /* is qgroup tracking in a consistent state? */ 1043 u64 qgroup_flags; 1044 1045 /* holds configuration and tracking. Protected by qgroup_lock */ 1046 struct rb_root qgroup_tree; 1047 struct rb_root qgroup_op_tree; 1048 spinlock_t qgroup_lock; 1049 spinlock_t qgroup_op_lock; 1050 atomic_t qgroup_op_seq; 1051 1052 /* 1053 * used to avoid frequently calling ulist_alloc()/ulist_free() 1054 * when doing qgroup accounting, it must be protected by qgroup_lock. 1055 */ 1056 struct ulist *qgroup_ulist; 1057 1058 /* protect user change for quota operations */ 1059 struct mutex qgroup_ioctl_lock; 1060 1061 /* list of dirty qgroups to be written at next commit */ 1062 struct list_head dirty_qgroups; 1063 1064 /* used by qgroup for an efficient tree traversal */ 1065 u64 qgroup_seq; 1066 1067 /* qgroup rescan items */ 1068 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1069 struct btrfs_key qgroup_rescan_progress; 1070 struct btrfs_workqueue *qgroup_rescan_workers; 1071 struct completion qgroup_rescan_completion; 1072 struct btrfs_work qgroup_rescan_work; 1073 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1074 1075 /* filesystem state */ 1076 unsigned long fs_state; 1077 1078 struct btrfs_delayed_root *delayed_root; 1079 1080 /* readahead tree */ 1081 spinlock_t reada_lock; 1082 struct radix_tree_root reada_tree; 1083 1084 /* readahead works cnt */ 1085 atomic_t reada_works_cnt; 1086 1087 /* Extent buffer radix tree */ 1088 spinlock_t buffer_lock; 1089 struct radix_tree_root buffer_radix; 1090 1091 /* next backup root to be overwritten */ 1092 int backup_root_index; 1093 1094 /* device replace state */ 1095 struct btrfs_dev_replace dev_replace; 1096 1097 struct percpu_counter bio_counter; 1098 wait_queue_head_t replace_wait; 1099 1100 struct semaphore uuid_tree_rescan_sem; 1101 1102 /* Used to reclaim the metadata space in the background. */ 1103 struct work_struct async_reclaim_work; 1104 1105 spinlock_t unused_bgs_lock; 1106 struct list_head unused_bgs; 1107 struct mutex unused_bg_unpin_mutex; 1108 struct mutex delete_unused_bgs_mutex; 1109 1110 /* For btrfs to record security options */ 1111 struct security_mnt_opts security_opts; 1112 1113 /* 1114 * Chunks that can't be freed yet (under a trim/discard operation) 1115 * and will be latter freed. Protected by fs_info->chunk_mutex. 1116 */ 1117 struct list_head pinned_chunks; 1118 1119 /* Cached block sizes */ 1120 u32 nodesize; 1121 u32 sectorsize; 1122 u32 stripesize; 1123 1124 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1125 spinlock_t ref_verify_lock; 1126 struct rb_root block_tree; 1127 #endif 1128 }; 1129 1130 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1131 { 1132 return sb->s_fs_info; 1133 } 1134 1135 struct btrfs_subvolume_writers { 1136 struct percpu_counter counter; 1137 wait_queue_head_t wait; 1138 }; 1139 1140 /* 1141 * The state of btrfs root 1142 */ 1143 /* 1144 * btrfs_record_root_in_trans is a multi-step process, 1145 * and it can race with the balancing code. But the 1146 * race is very small, and only the first time the root 1147 * is added to each transaction. So IN_TRANS_SETUP 1148 * is used to tell us when more checks are required 1149 */ 1150 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1151 #define BTRFS_ROOT_REF_COWS 1 1152 #define BTRFS_ROOT_TRACK_DIRTY 2 1153 #define BTRFS_ROOT_IN_RADIX 3 1154 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1155 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1156 #define BTRFS_ROOT_FORCE_COW 6 1157 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1158 #define BTRFS_ROOT_DIRTY 8 1159 1160 /* 1161 * in ram representation of the tree. extent_root is used for all allocations 1162 * and for the extent tree extent_root root. 1163 */ 1164 struct btrfs_root { 1165 struct extent_buffer *node; 1166 1167 struct extent_buffer *commit_root; 1168 struct btrfs_root *log_root; 1169 struct btrfs_root *reloc_root; 1170 1171 unsigned long state; 1172 struct btrfs_root_item root_item; 1173 struct btrfs_key root_key; 1174 struct btrfs_fs_info *fs_info; 1175 struct extent_io_tree dirty_log_pages; 1176 1177 struct mutex objectid_mutex; 1178 1179 spinlock_t accounting_lock; 1180 struct btrfs_block_rsv *block_rsv; 1181 1182 /* free ino cache stuff */ 1183 struct btrfs_free_space_ctl *free_ino_ctl; 1184 enum btrfs_caching_type ino_cache_state; 1185 spinlock_t ino_cache_lock; 1186 wait_queue_head_t ino_cache_wait; 1187 struct btrfs_free_space_ctl *free_ino_pinned; 1188 u64 ino_cache_progress; 1189 struct inode *ino_cache_inode; 1190 1191 struct mutex log_mutex; 1192 wait_queue_head_t log_writer_wait; 1193 wait_queue_head_t log_commit_wait[2]; 1194 struct list_head log_ctxs[2]; 1195 atomic_t log_writers; 1196 atomic_t log_commit[2]; 1197 atomic_t log_batch; 1198 int log_transid; 1199 /* No matter the commit succeeds or not*/ 1200 int log_transid_committed; 1201 /* Just be updated when the commit succeeds. */ 1202 int last_log_commit; 1203 pid_t log_start_pid; 1204 1205 u64 objectid; 1206 u64 last_trans; 1207 1208 u32 type; 1209 1210 u64 highest_objectid; 1211 1212 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1213 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1214 u64 alloc_bytenr; 1215 #endif 1216 1217 u64 defrag_trans_start; 1218 struct btrfs_key defrag_progress; 1219 struct btrfs_key defrag_max; 1220 1221 /* the dirty list is only used by non-reference counted roots */ 1222 struct list_head dirty_list; 1223 1224 struct list_head root_list; 1225 1226 spinlock_t log_extents_lock[2]; 1227 struct list_head logged_list[2]; 1228 1229 int orphan_cleanup_state; 1230 1231 spinlock_t inode_lock; 1232 /* red-black tree that keeps track of in-memory inodes */ 1233 struct rb_root inode_tree; 1234 1235 /* 1236 * radix tree that keeps track of delayed nodes of every inode, 1237 * protected by inode_lock 1238 */ 1239 struct radix_tree_root delayed_nodes_tree; 1240 /* 1241 * right now this just gets used so that a root has its own devid 1242 * for stat. It may be used for more later 1243 */ 1244 dev_t anon_dev; 1245 1246 spinlock_t root_item_lock; 1247 refcount_t refs; 1248 1249 struct mutex delalloc_mutex; 1250 spinlock_t delalloc_lock; 1251 /* 1252 * all of the inodes that have delalloc bytes. It is possible for 1253 * this list to be empty even when there is still dirty data=ordered 1254 * extents waiting to finish IO. 1255 */ 1256 struct list_head delalloc_inodes; 1257 struct list_head delalloc_root; 1258 u64 nr_delalloc_inodes; 1259 1260 struct mutex ordered_extent_mutex; 1261 /* 1262 * this is used by the balancing code to wait for all the pending 1263 * ordered extents 1264 */ 1265 spinlock_t ordered_extent_lock; 1266 1267 /* 1268 * all of the data=ordered extents pending writeback 1269 * these can span multiple transactions and basically include 1270 * every dirty data page that isn't from nodatacow 1271 */ 1272 struct list_head ordered_extents; 1273 struct list_head ordered_root; 1274 u64 nr_ordered_extents; 1275 1276 /* 1277 * Number of currently running SEND ioctls to prevent 1278 * manipulation with the read-only status via SUBVOL_SETFLAGS 1279 */ 1280 int send_in_progress; 1281 struct btrfs_subvolume_writers *subv_writers; 1282 atomic_t will_be_snapshotted; 1283 1284 /* For qgroup metadata reserved space */ 1285 spinlock_t qgroup_meta_rsv_lock; 1286 u64 qgroup_meta_rsv_pertrans; 1287 u64 qgroup_meta_rsv_prealloc; 1288 }; 1289 1290 struct btrfs_file_private { 1291 void *filldir_buf; 1292 }; 1293 1294 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1295 { 1296 return btrfs_sb(inode->i_sb)->sectorsize; 1297 } 1298 1299 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1300 { 1301 1302 return info->nodesize - sizeof(struct btrfs_header); 1303 } 1304 1305 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1306 1307 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1308 { 1309 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1310 } 1311 1312 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1313 { 1314 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1315 } 1316 1317 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1318 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1319 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1320 { 1321 return BTRFS_MAX_ITEM_SIZE(info) - 1322 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1323 } 1324 1325 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1326 { 1327 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1328 } 1329 1330 /* 1331 * Flags for mount options. 1332 * 1333 * Note: don't forget to add new options to btrfs_show_options() 1334 */ 1335 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1336 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1337 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1338 #define BTRFS_MOUNT_SSD (1 << 3) 1339 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1340 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1341 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1342 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1343 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1344 #define BTRFS_MOUNT_NOSSD (1 << 9) 1345 #define BTRFS_MOUNT_DISCARD (1 << 10) 1346 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1347 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1348 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1349 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1350 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1351 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1352 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1353 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1354 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1355 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1356 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1357 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1358 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1359 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1360 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1361 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1362 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1363 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1364 1365 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1366 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1367 1368 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1369 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1370 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1371 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1372 BTRFS_MOUNT_##opt) 1373 1374 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1375 { \ 1376 if (!btrfs_test_opt(fs_info, opt)) \ 1377 btrfs_info(fs_info, fmt, ##args); \ 1378 btrfs_set_opt(fs_info->mount_opt, opt); \ 1379 } 1380 1381 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1382 { \ 1383 if (btrfs_test_opt(fs_info, opt)) \ 1384 btrfs_info(fs_info, fmt, ##args); \ 1385 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1386 } 1387 1388 #ifdef CONFIG_BTRFS_DEBUG 1389 static inline int 1390 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1391 { 1392 struct btrfs_fs_info *fs_info = block_group->fs_info; 1393 1394 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1395 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1396 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1397 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1398 } 1399 #endif 1400 1401 /* 1402 * Requests for changes that need to be done during transaction commit. 1403 * 1404 * Internal mount options that are used for special handling of the real 1405 * mount options (eg. cannot be set during remount and have to be set during 1406 * transaction commit) 1407 */ 1408 1409 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1410 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1411 #define BTRFS_PENDING_COMMIT (2) 1412 1413 #define btrfs_test_pending(info, opt) \ 1414 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1415 #define btrfs_set_pending(info, opt) \ 1416 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1417 #define btrfs_clear_pending(info, opt) \ 1418 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1419 1420 /* 1421 * Helpers for setting pending mount option changes. 1422 * 1423 * Expects corresponding macros 1424 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1425 */ 1426 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1427 do { \ 1428 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1429 btrfs_info((info), fmt, ##args); \ 1430 btrfs_set_pending((info), SET_##opt); \ 1431 btrfs_clear_pending((info), CLEAR_##opt); \ 1432 } \ 1433 } while(0) 1434 1435 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1436 do { \ 1437 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1438 btrfs_info((info), fmt, ##args); \ 1439 btrfs_set_pending((info), CLEAR_##opt); \ 1440 btrfs_clear_pending((info), SET_##opt); \ 1441 } \ 1442 } while(0) 1443 1444 /* 1445 * Inode flags 1446 */ 1447 #define BTRFS_INODE_NODATASUM (1 << 0) 1448 #define BTRFS_INODE_NODATACOW (1 << 1) 1449 #define BTRFS_INODE_READONLY (1 << 2) 1450 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1451 #define BTRFS_INODE_PREALLOC (1 << 4) 1452 #define BTRFS_INODE_SYNC (1 << 5) 1453 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1454 #define BTRFS_INODE_APPEND (1 << 7) 1455 #define BTRFS_INODE_NODUMP (1 << 8) 1456 #define BTRFS_INODE_NOATIME (1 << 9) 1457 #define BTRFS_INODE_DIRSYNC (1 << 10) 1458 #define BTRFS_INODE_COMPRESS (1 << 11) 1459 1460 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1461 1462 struct btrfs_map_token { 1463 const struct extent_buffer *eb; 1464 char *kaddr; 1465 unsigned long offset; 1466 }; 1467 1468 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1469 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1470 1471 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1472 { 1473 token->kaddr = NULL; 1474 } 1475 1476 /* some macros to generate set/get functions for the struct fields. This 1477 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1478 * one for u8: 1479 */ 1480 #define le8_to_cpu(v) (v) 1481 #define cpu_to_le8(v) (v) 1482 #define __le8 u8 1483 1484 #define read_eb_member(eb, ptr, type, member, result) (\ 1485 read_extent_buffer(eb, (char *)(result), \ 1486 ((unsigned long)(ptr)) + \ 1487 offsetof(type, member), \ 1488 sizeof(((type *)0)->member))) 1489 1490 #define write_eb_member(eb, ptr, type, member, result) (\ 1491 write_extent_buffer(eb, (char *)(result), \ 1492 ((unsigned long)(ptr)) + \ 1493 offsetof(type, member), \ 1494 sizeof(((type *)0)->member))) 1495 1496 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1497 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1498 const void *ptr, unsigned long off, \ 1499 struct btrfs_map_token *token); \ 1500 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1501 unsigned long off, u##bits val, \ 1502 struct btrfs_map_token *token); \ 1503 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1504 const void *ptr, \ 1505 unsigned long off) \ 1506 { \ 1507 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1508 } \ 1509 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1510 unsigned long off, u##bits val) \ 1511 { \ 1512 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1513 } 1514 1515 DECLARE_BTRFS_SETGET_BITS(8) 1516 DECLARE_BTRFS_SETGET_BITS(16) 1517 DECLARE_BTRFS_SETGET_BITS(32) 1518 DECLARE_BTRFS_SETGET_BITS(64) 1519 1520 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1521 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1522 const type *s) \ 1523 { \ 1524 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1525 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1526 } \ 1527 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1528 u##bits val) \ 1529 { \ 1530 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1531 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1532 } \ 1533 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1534 const type *s, \ 1535 struct btrfs_map_token *token) \ 1536 { \ 1537 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1538 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1539 } \ 1540 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1541 type *s, u##bits val, \ 1542 struct btrfs_map_token *token) \ 1543 { \ 1544 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1545 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1546 } 1547 1548 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1549 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1550 { \ 1551 const type *p = page_address(eb->pages[0]); \ 1552 u##bits res = le##bits##_to_cpu(p->member); \ 1553 return res; \ 1554 } \ 1555 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1556 u##bits val) \ 1557 { \ 1558 type *p = page_address(eb->pages[0]); \ 1559 p->member = cpu_to_le##bits(val); \ 1560 } 1561 1562 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1563 static inline u##bits btrfs_##name(const type *s) \ 1564 { \ 1565 return le##bits##_to_cpu(s->member); \ 1566 } \ 1567 static inline void btrfs_set_##name(type *s, u##bits val) \ 1568 { \ 1569 s->member = cpu_to_le##bits(val); \ 1570 } 1571 1572 1573 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1574 struct btrfs_dev_item *s) 1575 { 1576 BUILD_BUG_ON(sizeof(u64) != 1577 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1578 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1579 total_bytes)); 1580 } 1581 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1582 struct btrfs_dev_item *s, 1583 u64 val) 1584 { 1585 BUILD_BUG_ON(sizeof(u64) != 1586 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1587 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1588 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1589 } 1590 1591 1592 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1593 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1594 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1595 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1596 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1597 start_offset, 64); 1598 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1599 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1600 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1601 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1602 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1603 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1604 1605 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1606 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1607 total_bytes, 64); 1608 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1609 bytes_used, 64); 1610 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1611 io_align, 32); 1612 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1613 io_width, 32); 1614 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1615 sector_size, 32); 1616 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1617 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1618 dev_group, 32); 1619 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1620 seek_speed, 8); 1621 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1622 bandwidth, 8); 1623 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1624 generation, 64); 1625 1626 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1627 { 1628 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1629 } 1630 1631 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1632 { 1633 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1634 } 1635 1636 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1637 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1638 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1639 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1640 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1641 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1642 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1643 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1644 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1645 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1646 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1647 1648 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1649 { 1650 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1651 } 1652 1653 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1654 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1656 stripe_len, 64); 1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1658 io_align, 32); 1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1660 io_width, 32); 1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1662 sector_size, 32); 1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1665 num_stripes, 16); 1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1667 sub_stripes, 16); 1668 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1669 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1670 1671 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1672 int nr) 1673 { 1674 unsigned long offset = (unsigned long)c; 1675 offset += offsetof(struct btrfs_chunk, stripe); 1676 offset += nr * sizeof(struct btrfs_stripe); 1677 return (struct btrfs_stripe *)offset; 1678 } 1679 1680 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1681 { 1682 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1683 } 1684 1685 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1686 struct btrfs_chunk *c, int nr) 1687 { 1688 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1689 } 1690 1691 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1692 struct btrfs_chunk *c, int nr) 1693 { 1694 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1695 } 1696 1697 /* struct btrfs_block_group_item */ 1698 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1699 used, 64); 1700 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1701 used, 64); 1702 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1703 struct btrfs_block_group_item, chunk_objectid, 64); 1704 1705 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1706 struct btrfs_block_group_item, chunk_objectid, 64); 1707 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1708 struct btrfs_block_group_item, flags, 64); 1709 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1710 struct btrfs_block_group_item, flags, 64); 1711 1712 /* struct btrfs_free_space_info */ 1713 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1714 extent_count, 32); 1715 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1716 1717 /* struct btrfs_inode_ref */ 1718 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1719 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1720 1721 /* struct btrfs_inode_extref */ 1722 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1723 parent_objectid, 64); 1724 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1725 name_len, 16); 1726 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1727 1728 /* struct btrfs_inode_item */ 1729 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1730 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1731 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1732 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1733 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1734 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1735 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1736 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1737 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1738 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1739 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1740 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1742 generation, 64); 1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1744 sequence, 64); 1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1746 transid, 64); 1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1748 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1749 nbytes, 64); 1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1751 block_group, 64); 1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1758 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1759 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1760 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1761 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1762 1763 /* struct btrfs_dev_extent */ 1764 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1765 chunk_tree, 64); 1766 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1767 chunk_objectid, 64); 1768 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1769 chunk_offset, 64); 1770 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1771 1772 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1773 { 1774 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1775 return (unsigned long)dev + ptr; 1776 } 1777 1778 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1779 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1780 generation, 64); 1781 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1782 1783 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1784 1785 1786 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1787 1788 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1789 struct btrfs_tree_block_info *item, 1790 struct btrfs_disk_key *key) 1791 { 1792 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1793 } 1794 1795 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1796 struct btrfs_tree_block_info *item, 1797 struct btrfs_disk_key *key) 1798 { 1799 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1800 } 1801 1802 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1803 root, 64); 1804 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1805 objectid, 64); 1806 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1807 offset, 64); 1808 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1809 count, 32); 1810 1811 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1812 count, 32); 1813 1814 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1815 type, 8); 1816 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1817 offset, 64); 1818 1819 static inline u32 btrfs_extent_inline_ref_size(int type) 1820 { 1821 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1822 type == BTRFS_SHARED_BLOCK_REF_KEY) 1823 return sizeof(struct btrfs_extent_inline_ref); 1824 if (type == BTRFS_SHARED_DATA_REF_KEY) 1825 return sizeof(struct btrfs_shared_data_ref) + 1826 sizeof(struct btrfs_extent_inline_ref); 1827 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1828 return sizeof(struct btrfs_extent_data_ref) + 1829 offsetof(struct btrfs_extent_inline_ref, offset); 1830 return 0; 1831 } 1832 1833 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1834 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1835 generation, 64); 1836 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1837 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1838 1839 /* struct btrfs_node */ 1840 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1841 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1842 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1843 blockptr, 64); 1844 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1845 generation, 64); 1846 1847 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1848 { 1849 unsigned long ptr; 1850 ptr = offsetof(struct btrfs_node, ptrs) + 1851 sizeof(struct btrfs_key_ptr) * nr; 1852 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1853 } 1854 1855 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1856 int nr, u64 val) 1857 { 1858 unsigned long ptr; 1859 ptr = offsetof(struct btrfs_node, ptrs) + 1860 sizeof(struct btrfs_key_ptr) * nr; 1861 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1862 } 1863 1864 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1865 { 1866 unsigned long ptr; 1867 ptr = offsetof(struct btrfs_node, ptrs) + 1868 sizeof(struct btrfs_key_ptr) * nr; 1869 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1870 } 1871 1872 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1873 int nr, u64 val) 1874 { 1875 unsigned long ptr; 1876 ptr = offsetof(struct btrfs_node, ptrs) + 1877 sizeof(struct btrfs_key_ptr) * nr; 1878 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1879 } 1880 1881 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1882 { 1883 return offsetof(struct btrfs_node, ptrs) + 1884 sizeof(struct btrfs_key_ptr) * nr; 1885 } 1886 1887 void btrfs_node_key(const struct extent_buffer *eb, 1888 struct btrfs_disk_key *disk_key, int nr); 1889 1890 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1891 struct btrfs_disk_key *disk_key, int nr) 1892 { 1893 unsigned long ptr; 1894 ptr = btrfs_node_key_ptr_offset(nr); 1895 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1896 struct btrfs_key_ptr, key, disk_key); 1897 } 1898 1899 /* struct btrfs_item */ 1900 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1901 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1902 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1903 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1904 1905 static inline unsigned long btrfs_item_nr_offset(int nr) 1906 { 1907 return offsetof(struct btrfs_leaf, items) + 1908 sizeof(struct btrfs_item) * nr; 1909 } 1910 1911 static inline struct btrfs_item *btrfs_item_nr(int nr) 1912 { 1913 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1914 } 1915 1916 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1917 struct btrfs_item *item) 1918 { 1919 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1920 } 1921 1922 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1923 { 1924 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1925 } 1926 1927 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1928 { 1929 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1930 } 1931 1932 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1933 { 1934 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1935 } 1936 1937 static inline void btrfs_item_key(const struct extent_buffer *eb, 1938 struct btrfs_disk_key *disk_key, int nr) 1939 { 1940 struct btrfs_item *item = btrfs_item_nr(nr); 1941 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1942 } 1943 1944 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1945 struct btrfs_disk_key *disk_key, int nr) 1946 { 1947 struct btrfs_item *item = btrfs_item_nr(nr); 1948 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1949 } 1950 1951 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1952 1953 /* 1954 * struct btrfs_root_ref 1955 */ 1956 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1957 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1958 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1959 1960 /* struct btrfs_dir_item */ 1961 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1962 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1963 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1964 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1965 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1966 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1967 data_len, 16); 1968 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1969 name_len, 16); 1970 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1971 transid, 64); 1972 1973 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1974 const struct btrfs_dir_item *item, 1975 struct btrfs_disk_key *key) 1976 { 1977 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1978 } 1979 1980 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1981 struct btrfs_dir_item *item, 1982 const struct btrfs_disk_key *key) 1983 { 1984 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1985 } 1986 1987 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1988 num_entries, 64); 1989 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1990 num_bitmaps, 64); 1991 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1992 generation, 64); 1993 1994 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1995 const struct btrfs_free_space_header *h, 1996 struct btrfs_disk_key *key) 1997 { 1998 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1999 } 2000 2001 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 2002 struct btrfs_free_space_header *h, 2003 const struct btrfs_disk_key *key) 2004 { 2005 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2006 } 2007 2008 /* struct btrfs_disk_key */ 2009 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2010 objectid, 64); 2011 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2012 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2013 2014 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2015 const struct btrfs_disk_key *disk) 2016 { 2017 cpu->offset = le64_to_cpu(disk->offset); 2018 cpu->type = disk->type; 2019 cpu->objectid = le64_to_cpu(disk->objectid); 2020 } 2021 2022 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2023 const struct btrfs_key *cpu) 2024 { 2025 disk->offset = cpu_to_le64(cpu->offset); 2026 disk->type = cpu->type; 2027 disk->objectid = cpu_to_le64(cpu->objectid); 2028 } 2029 2030 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2031 struct btrfs_key *key, int nr) 2032 { 2033 struct btrfs_disk_key disk_key; 2034 btrfs_node_key(eb, &disk_key, nr); 2035 btrfs_disk_key_to_cpu(key, &disk_key); 2036 } 2037 2038 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2039 struct btrfs_key *key, int nr) 2040 { 2041 struct btrfs_disk_key disk_key; 2042 btrfs_item_key(eb, &disk_key, nr); 2043 btrfs_disk_key_to_cpu(key, &disk_key); 2044 } 2045 2046 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2047 const struct btrfs_dir_item *item, 2048 struct btrfs_key *key) 2049 { 2050 struct btrfs_disk_key disk_key; 2051 btrfs_dir_item_key(eb, item, &disk_key); 2052 btrfs_disk_key_to_cpu(key, &disk_key); 2053 } 2054 2055 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2056 { 2057 return key->type; 2058 } 2059 2060 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2061 { 2062 key->type = val; 2063 } 2064 2065 /* struct btrfs_header */ 2066 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2067 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2068 generation, 64); 2069 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2070 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2071 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2072 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2073 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2074 generation, 64); 2075 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2076 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2077 nritems, 32); 2078 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2079 2080 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2081 { 2082 return (btrfs_header_flags(eb) & flag) == flag; 2083 } 2084 2085 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2086 { 2087 u64 flags = btrfs_header_flags(eb); 2088 btrfs_set_header_flags(eb, flags | flag); 2089 return (flags & flag) == flag; 2090 } 2091 2092 static inline int btrfs_clear_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 return (flags & flag) == flag; 2097 } 2098 2099 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2100 { 2101 u64 flags = btrfs_header_flags(eb); 2102 return flags >> BTRFS_BACKREF_REV_SHIFT; 2103 } 2104 2105 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2106 int rev) 2107 { 2108 u64 flags = btrfs_header_flags(eb); 2109 flags &= ~BTRFS_BACKREF_REV_MASK; 2110 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2111 btrfs_set_header_flags(eb, flags); 2112 } 2113 2114 static inline unsigned long btrfs_header_fsid(void) 2115 { 2116 return offsetof(struct btrfs_header, fsid); 2117 } 2118 2119 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2120 { 2121 return offsetof(struct btrfs_header, chunk_tree_uuid); 2122 } 2123 2124 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2125 { 2126 return btrfs_header_level(eb) == 0; 2127 } 2128 2129 /* struct btrfs_root_item */ 2130 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2131 generation, 64); 2132 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2133 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2134 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2135 2136 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2137 generation, 64); 2138 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2139 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2140 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2141 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2142 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2143 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2144 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2145 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2146 last_snapshot, 64); 2147 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2148 generation_v2, 64); 2149 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2150 ctransid, 64); 2151 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2152 otransid, 64); 2153 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2154 stransid, 64); 2155 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2156 rtransid, 64); 2157 2158 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2159 { 2160 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2161 } 2162 2163 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2164 { 2165 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2166 } 2167 2168 /* struct btrfs_root_backup */ 2169 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2170 tree_root, 64); 2171 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2172 tree_root_gen, 64); 2173 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2174 tree_root_level, 8); 2175 2176 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2177 chunk_root, 64); 2178 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2179 chunk_root_gen, 64); 2180 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2181 chunk_root_level, 8); 2182 2183 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2184 extent_root, 64); 2185 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2186 extent_root_gen, 64); 2187 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2188 extent_root_level, 8); 2189 2190 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2191 fs_root, 64); 2192 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2193 fs_root_gen, 64); 2194 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2195 fs_root_level, 8); 2196 2197 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2198 dev_root, 64); 2199 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2200 dev_root_gen, 64); 2201 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2202 dev_root_level, 8); 2203 2204 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2205 csum_root, 64); 2206 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2207 csum_root_gen, 64); 2208 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2209 csum_root_level, 8); 2210 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2211 total_bytes, 64); 2212 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2213 bytes_used, 64); 2214 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2215 num_devices, 64); 2216 2217 /* struct btrfs_balance_item */ 2218 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2219 2220 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2221 const struct btrfs_balance_item *bi, 2222 struct btrfs_disk_balance_args *ba) 2223 { 2224 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2225 } 2226 2227 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2228 struct btrfs_balance_item *bi, 2229 const struct btrfs_disk_balance_args *ba) 2230 { 2231 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2232 } 2233 2234 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2235 const struct btrfs_balance_item *bi, 2236 struct btrfs_disk_balance_args *ba) 2237 { 2238 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2239 } 2240 2241 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2242 struct btrfs_balance_item *bi, 2243 const struct btrfs_disk_balance_args *ba) 2244 { 2245 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2246 } 2247 2248 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2249 const struct btrfs_balance_item *bi, 2250 struct btrfs_disk_balance_args *ba) 2251 { 2252 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2253 } 2254 2255 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2256 struct btrfs_balance_item *bi, 2257 const struct btrfs_disk_balance_args *ba) 2258 { 2259 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2260 } 2261 2262 static inline void 2263 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2264 const struct btrfs_disk_balance_args *disk) 2265 { 2266 memset(cpu, 0, sizeof(*cpu)); 2267 2268 cpu->profiles = le64_to_cpu(disk->profiles); 2269 cpu->usage = le64_to_cpu(disk->usage); 2270 cpu->devid = le64_to_cpu(disk->devid); 2271 cpu->pstart = le64_to_cpu(disk->pstart); 2272 cpu->pend = le64_to_cpu(disk->pend); 2273 cpu->vstart = le64_to_cpu(disk->vstart); 2274 cpu->vend = le64_to_cpu(disk->vend); 2275 cpu->target = le64_to_cpu(disk->target); 2276 cpu->flags = le64_to_cpu(disk->flags); 2277 cpu->limit = le64_to_cpu(disk->limit); 2278 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2279 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2280 } 2281 2282 static inline void 2283 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2284 const struct btrfs_balance_args *cpu) 2285 { 2286 memset(disk, 0, sizeof(*disk)); 2287 2288 disk->profiles = cpu_to_le64(cpu->profiles); 2289 disk->usage = cpu_to_le64(cpu->usage); 2290 disk->devid = cpu_to_le64(cpu->devid); 2291 disk->pstart = cpu_to_le64(cpu->pstart); 2292 disk->pend = cpu_to_le64(cpu->pend); 2293 disk->vstart = cpu_to_le64(cpu->vstart); 2294 disk->vend = cpu_to_le64(cpu->vend); 2295 disk->target = cpu_to_le64(cpu->target); 2296 disk->flags = cpu_to_le64(cpu->flags); 2297 disk->limit = cpu_to_le64(cpu->limit); 2298 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2299 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2300 } 2301 2302 /* struct btrfs_super_block */ 2303 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2305 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2306 generation, 64); 2307 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2308 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2309 struct btrfs_super_block, sys_chunk_array_size, 32); 2310 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2311 struct btrfs_super_block, chunk_root_generation, 64); 2312 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2313 root_level, 8); 2314 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2315 chunk_root, 64); 2316 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2317 chunk_root_level, 8); 2318 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2319 log_root, 64); 2320 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2321 log_root_transid, 64); 2322 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2323 log_root_level, 8); 2324 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2325 total_bytes, 64); 2326 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2327 bytes_used, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2329 sectorsize, 32); 2330 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2331 nodesize, 32); 2332 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2333 stripesize, 32); 2334 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2335 root_dir_objectid, 64); 2336 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2337 num_devices, 64); 2338 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2339 compat_flags, 64); 2340 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2341 compat_ro_flags, 64); 2342 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2343 incompat_flags, 64); 2344 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2345 csum_type, 16); 2346 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2347 cache_generation, 64); 2348 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2349 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2350 uuid_tree_generation, 64); 2351 2352 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2353 { 2354 u16 t = btrfs_super_csum_type(s); 2355 /* 2356 * csum type is validated at mount time 2357 */ 2358 return btrfs_csum_sizes[t]; 2359 } 2360 2361 2362 /* 2363 * The leaf data grows from end-to-front in the node. 2364 * this returns the address of the start of the last item, 2365 * which is the stop of the leaf data stack 2366 */ 2367 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2368 const struct extent_buffer *leaf) 2369 { 2370 u32 nr = btrfs_header_nritems(leaf); 2371 2372 if (nr == 0) 2373 return BTRFS_LEAF_DATA_SIZE(fs_info); 2374 return btrfs_item_offset_nr(leaf, nr - 1); 2375 } 2376 2377 /* struct btrfs_file_extent_item */ 2378 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2379 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2380 struct btrfs_file_extent_item, disk_bytenr, 64); 2381 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2382 struct btrfs_file_extent_item, offset, 64); 2383 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2384 struct btrfs_file_extent_item, generation, 64); 2385 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2386 struct btrfs_file_extent_item, num_bytes, 64); 2387 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2388 struct btrfs_file_extent_item, disk_num_bytes, 64); 2389 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2390 struct btrfs_file_extent_item, compression, 8); 2391 2392 static inline unsigned long 2393 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2394 { 2395 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2396 } 2397 2398 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2399 { 2400 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2401 } 2402 2403 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2404 disk_bytenr, 64); 2405 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2406 generation, 64); 2407 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2408 disk_num_bytes, 64); 2409 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2410 offset, 64); 2411 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2412 num_bytes, 64); 2413 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2414 ram_bytes, 64); 2415 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2416 compression, 8); 2417 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2418 encryption, 8); 2419 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2420 other_encoding, 16); 2421 2422 /* 2423 * this returns the number of bytes used by the item on disk, minus the 2424 * size of any extent headers. If a file is compressed on disk, this is 2425 * the compressed size 2426 */ 2427 static inline u32 btrfs_file_extent_inline_item_len( 2428 const struct extent_buffer *eb, 2429 struct btrfs_item *e) 2430 { 2431 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2432 } 2433 2434 /* btrfs_dev_stats_item */ 2435 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2436 const struct btrfs_dev_stats_item *ptr, 2437 int index) 2438 { 2439 u64 val; 2440 2441 read_extent_buffer(eb, &val, 2442 offsetof(struct btrfs_dev_stats_item, values) + 2443 ((unsigned long)ptr) + (index * sizeof(u64)), 2444 sizeof(val)); 2445 return val; 2446 } 2447 2448 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2449 struct btrfs_dev_stats_item *ptr, 2450 int index, u64 val) 2451 { 2452 write_extent_buffer(eb, &val, 2453 offsetof(struct btrfs_dev_stats_item, values) + 2454 ((unsigned long)ptr) + (index * sizeof(u64)), 2455 sizeof(val)); 2456 } 2457 2458 /* btrfs_qgroup_status_item */ 2459 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2460 generation, 64); 2461 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2462 version, 64); 2463 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2464 flags, 64); 2465 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2466 rescan, 64); 2467 2468 /* btrfs_qgroup_info_item */ 2469 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2470 generation, 64); 2471 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2472 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2473 rfer_cmpr, 64); 2474 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2475 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2476 excl_cmpr, 64); 2477 2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2479 struct btrfs_qgroup_info_item, generation, 64); 2480 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2481 rfer, 64); 2482 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2483 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2484 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2485 excl, 64); 2486 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2487 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2488 2489 /* btrfs_qgroup_limit_item */ 2490 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2491 flags, 64); 2492 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2493 max_rfer, 64); 2494 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2495 max_excl, 64); 2496 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2497 rsv_rfer, 64); 2498 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2499 rsv_excl, 64); 2500 2501 /* btrfs_dev_replace_item */ 2502 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2503 struct btrfs_dev_replace_item, src_devid, 64); 2504 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2505 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2506 64); 2507 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2508 replace_state, 64); 2509 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2510 time_started, 64); 2511 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2512 time_stopped, 64); 2513 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2514 num_write_errors, 64); 2515 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2516 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2517 64); 2518 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2519 cursor_left, 64); 2520 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2521 cursor_right, 64); 2522 2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2524 struct btrfs_dev_replace_item, src_devid, 64); 2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2526 struct btrfs_dev_replace_item, 2527 cont_reading_from_srcdev_mode, 64); 2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2529 struct btrfs_dev_replace_item, replace_state, 64); 2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2531 struct btrfs_dev_replace_item, time_started, 64); 2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2533 struct btrfs_dev_replace_item, time_stopped, 64); 2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2535 struct btrfs_dev_replace_item, num_write_errors, 64); 2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2537 struct btrfs_dev_replace_item, 2538 num_uncorrectable_read_errors, 64); 2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2540 struct btrfs_dev_replace_item, cursor_left, 64); 2541 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2542 struct btrfs_dev_replace_item, cursor_right, 64); 2543 2544 /* helper function to cast into the data area of the leaf. */ 2545 #define btrfs_item_ptr(leaf, slot, type) \ 2546 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2547 btrfs_item_offset_nr(leaf, slot))) 2548 2549 #define btrfs_item_ptr_offset(leaf, slot) \ 2550 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2551 btrfs_item_offset_nr(leaf, slot))) 2552 2553 static inline u64 btrfs_name_hash(const char *name, int len) 2554 { 2555 return crc32c((u32)~1, name, len); 2556 } 2557 2558 /* 2559 * Figure the key offset of an extended inode ref 2560 */ 2561 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2562 int len) 2563 { 2564 return (u64) crc32c(parent_objectid, name, len); 2565 } 2566 2567 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2568 { 2569 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2570 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2571 } 2572 2573 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2574 { 2575 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2576 } 2577 2578 /* extent-tree.c */ 2579 2580 enum btrfs_inline_ref_type { 2581 BTRFS_REF_TYPE_INVALID = 0, 2582 BTRFS_REF_TYPE_BLOCK = 1, 2583 BTRFS_REF_TYPE_DATA = 2, 2584 BTRFS_REF_TYPE_ANY = 3, 2585 }; 2586 2587 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2588 struct btrfs_extent_inline_ref *iref, 2589 enum btrfs_inline_ref_type is_data); 2590 2591 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2592 2593 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2594 unsigned num_items) 2595 { 2596 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2597 } 2598 2599 /* 2600 * Doing a truncate won't result in new nodes or leaves, just what we need for 2601 * COW. 2602 */ 2603 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2604 unsigned num_items) 2605 { 2606 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2607 } 2608 2609 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2610 struct btrfs_fs_info *fs_info); 2611 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2612 struct btrfs_fs_info *fs_info); 2613 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2614 const u64 start); 2615 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2616 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2617 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2618 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2619 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2620 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2621 unsigned long count); 2622 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2623 unsigned long count, u64 transid, int wait); 2624 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2625 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2626 struct btrfs_fs_info *fs_info, u64 bytenr, 2627 u64 offset, int metadata, u64 *refs, u64 *flags); 2628 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2629 u64 bytenr, u64 num, int reserved); 2630 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2631 u64 bytenr, u64 num_bytes); 2632 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2633 struct extent_buffer *eb); 2634 int btrfs_cross_ref_exist(struct btrfs_root *root, 2635 u64 objectid, u64 offset, u64 bytenr); 2636 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2637 struct btrfs_fs_info *info, 2638 u64 bytenr); 2639 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2640 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2641 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2642 struct btrfs_root *root, 2643 u64 parent, u64 root_objectid, 2644 const struct btrfs_disk_key *key, 2645 int level, u64 hint, 2646 u64 empty_size); 2647 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2648 struct btrfs_root *root, 2649 struct extent_buffer *buf, 2650 u64 parent, int last_ref); 2651 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2652 struct btrfs_root *root, u64 owner, 2653 u64 offset, u64 ram_bytes, 2654 struct btrfs_key *ins); 2655 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2656 u64 root_objectid, u64 owner, u64 offset, 2657 struct btrfs_key *ins); 2658 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2659 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2660 struct btrfs_key *ins, int is_data, int delalloc); 2661 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2662 struct extent_buffer *buf, int full_backref); 2663 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2664 struct extent_buffer *buf, int full_backref); 2665 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2666 struct btrfs_fs_info *fs_info, 2667 u64 bytenr, u64 num_bytes, u64 flags, 2668 int level, int is_data); 2669 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2670 struct btrfs_root *root, 2671 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2672 u64 owner, u64 offset); 2673 2674 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2675 u64 start, u64 len, int delalloc); 2676 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2677 u64 start, u64 len); 2678 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2679 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2680 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2681 struct btrfs_root *root, 2682 u64 bytenr, u64 num_bytes, u64 parent, 2683 u64 root_objectid, u64 owner, u64 offset); 2684 2685 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2686 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2687 struct btrfs_fs_info *fs_info); 2688 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2689 struct btrfs_fs_info *fs_info); 2690 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2691 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2692 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2693 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2694 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2695 u64 bytes_used, u64 type, u64 chunk_offset, 2696 u64 size); 2697 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 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_DELALLOC = 3, 2727 FLUSH_DELALLOC_WAIT = 4, 2728 ALLOC_CHUNK = 5, 2729 COMMIT_TRANS = 6, 2730 }; 2731 2732 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2733 int btrfs_check_data_free_space(struct inode *inode, 2734 struct extent_changeset **reserved, u64 start, u64 len); 2735 void btrfs_free_reserved_data_space(struct inode *inode, 2736 struct extent_changeset *reserved, u64 start, u64 len); 2737 void btrfs_delalloc_release_space(struct inode *inode, 2738 struct extent_changeset *reserved, 2739 u64 start, u64 len, bool qgroup_free); 2740 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2741 u64 len); 2742 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2743 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2744 struct btrfs_block_rsv *rsv, 2745 int nitems, bool use_global_rsv); 2746 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2747 struct btrfs_block_rsv *rsv); 2748 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2749 bool qgroup_free); 2750 2751 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2752 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2753 bool qgroup_free); 2754 int btrfs_delalloc_reserve_space(struct inode *inode, 2755 struct extent_changeset **reserved, u64 start, u64 len); 2756 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2757 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2758 unsigned short type); 2759 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2760 struct btrfs_block_rsv *rsv, 2761 unsigned short type); 2762 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2763 struct btrfs_block_rsv *rsv); 2764 int btrfs_block_rsv_add(struct btrfs_root *root, 2765 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2766 enum btrfs_reserve_flush_enum flush); 2767 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2768 int btrfs_block_rsv_refill(struct btrfs_root *root, 2769 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2770 enum btrfs_reserve_flush_enum flush); 2771 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2772 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2773 int update_size); 2774 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2775 struct btrfs_block_rsv *dest, u64 num_bytes, 2776 int min_factor); 2777 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2778 struct btrfs_block_rsv *block_rsv, 2779 u64 num_bytes); 2780 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); 2781 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2782 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2783 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2784 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2785 u64 start, u64 end); 2786 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2787 u64 num_bytes, u64 *actual_bytes); 2788 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); 2789 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2790 2791 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2792 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2793 struct btrfs_fs_info *fs_info); 2794 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2795 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2796 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2797 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); 2798 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2799 u64 start, u64 end); 2800 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); 2801 2802 /* ctree.c */ 2803 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2804 int level, int *slot); 2805 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2806 int btrfs_previous_item(struct btrfs_root *root, 2807 struct btrfs_path *path, u64 min_objectid, 2808 int type); 2809 int btrfs_previous_extent_item(struct btrfs_root *root, 2810 struct btrfs_path *path, u64 min_objectid); 2811 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2812 struct btrfs_path *path, 2813 const struct btrfs_key *new_key); 2814 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2815 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2816 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2817 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2818 struct btrfs_key *key, int lowest_level, 2819 u64 min_trans); 2820 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2821 struct btrfs_path *path, 2822 u64 min_trans); 2823 enum btrfs_compare_tree_result { 2824 BTRFS_COMPARE_TREE_NEW, 2825 BTRFS_COMPARE_TREE_DELETED, 2826 BTRFS_COMPARE_TREE_CHANGED, 2827 BTRFS_COMPARE_TREE_SAME, 2828 }; 2829 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2830 struct btrfs_path *right_path, 2831 struct btrfs_key *key, 2832 enum btrfs_compare_tree_result result, 2833 void *ctx); 2834 int btrfs_compare_trees(struct btrfs_root *left_root, 2835 struct btrfs_root *right_root, 2836 btrfs_changed_cb_t cb, void *ctx); 2837 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2838 struct btrfs_root *root, struct extent_buffer *buf, 2839 struct extent_buffer *parent, int parent_slot, 2840 struct extent_buffer **cow_ret); 2841 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2842 struct btrfs_root *root, 2843 struct extent_buffer *buf, 2844 struct extent_buffer **cow_ret, u64 new_root_objectid); 2845 int btrfs_block_can_be_shared(struct btrfs_root *root, 2846 struct extent_buffer *buf); 2847 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2848 u32 data_size); 2849 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2850 struct btrfs_path *path, u32 new_size, int from_end); 2851 int btrfs_split_item(struct btrfs_trans_handle *trans, 2852 struct btrfs_root *root, 2853 struct btrfs_path *path, 2854 const struct btrfs_key *new_key, 2855 unsigned long split_offset); 2856 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2857 struct btrfs_root *root, 2858 struct btrfs_path *path, 2859 const struct btrfs_key *new_key); 2860 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2861 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2862 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2863 const struct btrfs_key *key, struct btrfs_path *p, 2864 int ins_len, int cow); 2865 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2866 struct btrfs_path *p, u64 time_seq); 2867 int btrfs_search_slot_for_read(struct btrfs_root *root, 2868 const struct btrfs_key *key, 2869 struct btrfs_path *p, int find_higher, 2870 int return_any); 2871 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2872 struct btrfs_root *root, struct extent_buffer *parent, 2873 int start_slot, u64 *last_ret, 2874 struct btrfs_key *progress); 2875 void btrfs_release_path(struct btrfs_path *p); 2876 struct btrfs_path *btrfs_alloc_path(void); 2877 void btrfs_free_path(struct btrfs_path *p); 2878 void btrfs_set_path_blocking(struct btrfs_path *p); 2879 void btrfs_clear_path_blocking(struct btrfs_path *p, 2880 struct extent_buffer *held, int held_rw); 2881 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2882 2883 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2884 struct btrfs_path *path, int slot, int nr); 2885 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2886 struct btrfs_root *root, 2887 struct btrfs_path *path) 2888 { 2889 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2890 } 2891 2892 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2893 const struct btrfs_key *cpu_key, u32 *data_size, 2894 u32 total_data, u32 total_size, int nr); 2895 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2896 const struct btrfs_key *key, void *data, u32 data_size); 2897 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2898 struct btrfs_root *root, 2899 struct btrfs_path *path, 2900 const struct btrfs_key *cpu_key, u32 *data_size, 2901 int nr); 2902 2903 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2904 struct btrfs_root *root, 2905 struct btrfs_path *path, 2906 const struct btrfs_key *key, 2907 u32 data_size) 2908 { 2909 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2910 } 2911 2912 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2913 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2914 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2915 u64 time_seq); 2916 static inline int btrfs_next_old_item(struct btrfs_root *root, 2917 struct btrfs_path *p, u64 time_seq) 2918 { 2919 ++p->slots[0]; 2920 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2921 return btrfs_next_old_leaf(root, p, time_seq); 2922 return 0; 2923 } 2924 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2925 { 2926 return btrfs_next_old_item(root, p, 0); 2927 } 2928 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2929 struct extent_buffer *leaf); 2930 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2931 struct btrfs_block_rsv *block_rsv, 2932 int update_ref, int for_reloc); 2933 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2934 struct btrfs_root *root, 2935 struct extent_buffer *node, 2936 struct extent_buffer *parent); 2937 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2938 { 2939 /* 2940 * Do it this way so we only ever do one test_bit in the normal case. 2941 */ 2942 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2943 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2944 return 2; 2945 return 1; 2946 } 2947 return 0; 2948 } 2949 2950 /* 2951 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2952 * anything except sleeping. This function is used to check the status of 2953 * the fs. 2954 */ 2955 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2956 { 2957 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2958 } 2959 2960 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2961 { 2962 kfree(fs_info->balance_ctl); 2963 kfree(fs_info->delayed_root); 2964 kfree(fs_info->extent_root); 2965 kfree(fs_info->tree_root); 2966 kfree(fs_info->chunk_root); 2967 kfree(fs_info->dev_root); 2968 kfree(fs_info->csum_root); 2969 kfree(fs_info->quota_root); 2970 kfree(fs_info->uuid_root); 2971 kfree(fs_info->free_space_root); 2972 kfree(fs_info->super_copy); 2973 kfree(fs_info->super_for_commit); 2974 security_free_mnt_opts(&fs_info->security_opts); 2975 kvfree(fs_info); 2976 } 2977 2978 /* tree mod log functions from ctree.c */ 2979 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2980 struct seq_list *elem); 2981 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2982 struct seq_list *elem); 2983 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2984 2985 /* root-item.c */ 2986 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2987 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2988 int name_len); 2989 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2990 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2991 int name_len); 2992 int btrfs_del_root(struct btrfs_trans_handle *trans, 2993 const struct btrfs_key *key); 2994 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2995 const struct btrfs_key *key, 2996 struct btrfs_root_item *item); 2997 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2998 struct btrfs_root *root, 2999 struct btrfs_key *key, 3000 struct btrfs_root_item *item); 3001 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3002 struct btrfs_path *path, struct btrfs_root_item *root_item, 3003 struct btrfs_key *root_key); 3004 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3005 void btrfs_set_root_node(struct btrfs_root_item *item, 3006 struct extent_buffer *node); 3007 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3008 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3009 struct btrfs_root *root); 3010 3011 /* uuid-tree.c */ 3012 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3013 u64 subid); 3014 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3015 u64 subid); 3016 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3017 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3018 u64)); 3019 3020 /* dir-item.c */ 3021 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3022 const char *name, int name_len); 3023 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3024 struct btrfs_root *root, const char *name, 3025 int name_len, struct btrfs_inode *dir, 3026 struct btrfs_key *location, u8 type, u64 index); 3027 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3028 struct btrfs_root *root, 3029 struct btrfs_path *path, u64 dir, 3030 const char *name, int name_len, 3031 int mod); 3032 struct btrfs_dir_item * 3033 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3034 struct btrfs_root *root, 3035 struct btrfs_path *path, u64 dir, 3036 u64 objectid, const char *name, int name_len, 3037 int mod); 3038 struct btrfs_dir_item * 3039 btrfs_search_dir_index_item(struct btrfs_root *root, 3040 struct btrfs_path *path, u64 dirid, 3041 const char *name, int name_len); 3042 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3043 struct btrfs_root *root, 3044 struct btrfs_path *path, 3045 struct btrfs_dir_item *di); 3046 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3047 struct btrfs_root *root, 3048 struct btrfs_path *path, u64 objectid, 3049 const char *name, u16 name_len, 3050 const void *data, u16 data_len); 3051 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3052 struct btrfs_root *root, 3053 struct btrfs_path *path, u64 dir, 3054 const char *name, u16 name_len, 3055 int mod); 3056 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3057 struct btrfs_path *path, 3058 const char *name, 3059 int name_len); 3060 3061 /* orphan.c */ 3062 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3063 struct btrfs_root *root, u64 offset); 3064 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3065 struct btrfs_root *root, u64 offset); 3066 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3067 3068 /* inode-item.c */ 3069 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3070 struct btrfs_root *root, 3071 const char *name, int name_len, 3072 u64 inode_objectid, u64 ref_objectid, u64 index); 3073 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3074 struct btrfs_root *root, 3075 const char *name, int name_len, 3076 u64 inode_objectid, u64 ref_objectid, u64 *index); 3077 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3078 struct btrfs_root *root, 3079 struct btrfs_path *path, u64 objectid); 3080 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3081 *root, struct btrfs_path *path, 3082 struct btrfs_key *location, int mod); 3083 3084 struct btrfs_inode_extref * 3085 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3086 struct btrfs_root *root, 3087 struct btrfs_path *path, 3088 const char *name, int name_len, 3089 u64 inode_objectid, u64 ref_objectid, int ins_len, 3090 int cow); 3091 3092 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3093 const char *name, 3094 int name_len, struct btrfs_inode_ref **ref_ret); 3095 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3096 u64 ref_objectid, const char *name, 3097 int name_len, 3098 struct btrfs_inode_extref **extref_ret); 3099 3100 /* file-item.c */ 3101 struct btrfs_dio_private; 3102 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3103 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3104 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3105 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3106 u64 logical_offset); 3107 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3108 struct btrfs_root *root, 3109 u64 objectid, u64 pos, 3110 u64 disk_offset, u64 disk_num_bytes, 3111 u64 num_bytes, u64 offset, u64 ram_bytes, 3112 u8 compression, u8 encryption, u16 other_encoding); 3113 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3114 struct btrfs_root *root, 3115 struct btrfs_path *path, u64 objectid, 3116 u64 bytenr, int mod); 3117 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3118 struct btrfs_root *root, 3119 struct btrfs_ordered_sum *sums); 3120 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3121 u64 file_start, int contig); 3122 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3123 struct list_head *list, int search_commit); 3124 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3125 const struct btrfs_path *path, 3126 struct btrfs_file_extent_item *fi, 3127 const bool new_inline, 3128 struct extent_map *em); 3129 3130 /* inode.c */ 3131 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3132 struct page *page, size_t pg_offset, u64 start, 3133 u64 len, int create); 3134 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3135 u64 *orig_start, u64 *orig_block_len, 3136 u64 *ram_bytes); 3137 3138 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3139 struct btrfs_inode *inode); 3140 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3141 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3142 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3143 struct btrfs_root *root, 3144 struct btrfs_inode *dir, struct btrfs_inode *inode, 3145 const char *name, int name_len); 3146 int btrfs_add_link(struct btrfs_trans_handle *trans, 3147 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3148 const char *name, int name_len, int add_backref, u64 index); 3149 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3150 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3151 int front); 3152 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3153 struct btrfs_root *root, 3154 struct inode *inode, u64 new_size, 3155 u32 min_type); 3156 3157 int btrfs_start_delalloc_inodes(struct btrfs_root *root); 3158 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3159 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3160 unsigned int extra_bits, 3161 struct extent_state **cached_state, int dedupe); 3162 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3163 struct btrfs_root *new_root, 3164 struct btrfs_root *parent_root, 3165 u64 new_dirid); 3166 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3167 size_t size, struct bio *bio, 3168 unsigned long bio_flags); 3169 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3170 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3171 int btrfs_readpage(struct file *file, struct page *page); 3172 void btrfs_evict_inode(struct inode *inode); 3173 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3174 struct inode *btrfs_alloc_inode(struct super_block *sb); 3175 void btrfs_destroy_inode(struct inode *inode); 3176 int btrfs_drop_inode(struct inode *inode); 3177 int __init btrfs_init_cachep(void); 3178 void __cold btrfs_destroy_cachep(void); 3179 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3180 struct btrfs_root *root, int *was_new); 3181 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3182 struct page *page, size_t pg_offset, 3183 u64 start, u64 end, int create); 3184 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3185 struct btrfs_root *root, 3186 struct inode *inode); 3187 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3188 struct btrfs_root *root, struct inode *inode); 3189 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3190 struct btrfs_inode *inode); 3191 int btrfs_orphan_cleanup(struct btrfs_root *root); 3192 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3193 void btrfs_add_delayed_iput(struct inode *inode); 3194 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3195 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3196 u64 start, u64 num_bytes, u64 min_size, 3197 loff_t actual_len, u64 *alloc_hint); 3198 int btrfs_prealloc_file_range_trans(struct inode *inode, 3199 struct btrfs_trans_handle *trans, int mode, 3200 u64 start, u64 num_bytes, u64 min_size, 3201 loff_t actual_len, u64 *alloc_hint); 3202 extern const struct dentry_operations btrfs_dentry_operations; 3203 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3204 void btrfs_test_inode_set_ops(struct inode *inode); 3205 #endif 3206 3207 /* ioctl.c */ 3208 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3209 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3210 int btrfs_ioctl_get_supported_features(void __user *arg); 3211 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3212 int btrfs_is_empty_uuid(u8 *uuid); 3213 int btrfs_defrag_file(struct inode *inode, struct file *file, 3214 struct btrfs_ioctl_defrag_range_args *range, 3215 u64 newer_than, unsigned long max_pages); 3216 void btrfs_get_block_group_info(struct list_head *groups_list, 3217 struct btrfs_ioctl_space_info *space); 3218 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3219 struct btrfs_ioctl_balance_args *bargs); 3220 int btrfs_dedupe_file_range(struct file *src_file, loff_t src_loff, 3221 struct file *dst_file, loff_t dst_loff, 3222 u64 olen); 3223 3224 /* file.c */ 3225 int __init btrfs_auto_defrag_init(void); 3226 void __cold btrfs_auto_defrag_exit(void); 3227 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3228 struct btrfs_inode *inode); 3229 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3230 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3231 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3232 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3233 int skip_pinned); 3234 extern const struct file_operations btrfs_file_operations; 3235 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3236 struct btrfs_root *root, struct inode *inode, 3237 struct btrfs_path *path, u64 start, u64 end, 3238 u64 *drop_end, int drop_cache, 3239 int replace_extent, 3240 u32 extent_item_size, 3241 int *key_inserted); 3242 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3243 struct btrfs_root *root, struct inode *inode, u64 start, 3244 u64 end, int drop_cache); 3245 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3246 struct btrfs_inode *inode, u64 start, u64 end); 3247 int btrfs_release_file(struct inode *inode, struct file *file); 3248 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3249 size_t num_pages, loff_t pos, size_t write_bytes, 3250 struct extent_state **cached); 3251 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3252 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3253 struct file *file_out, loff_t pos_out, u64 len); 3254 3255 /* tree-defrag.c */ 3256 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3257 struct btrfs_root *root); 3258 3259 /* sysfs.c */ 3260 int __init btrfs_init_sysfs(void); 3261 void __cold btrfs_exit_sysfs(void); 3262 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3263 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3264 3265 /* super.c */ 3266 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3267 unsigned long new_flags); 3268 int btrfs_sync_fs(struct super_block *sb, int wait); 3269 3270 static inline __printf(2, 3) __cold 3271 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3272 { 3273 } 3274 3275 #ifdef CONFIG_PRINTK 3276 __printf(2, 3) 3277 __cold 3278 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3279 #else 3280 #define btrfs_printk(fs_info, fmt, args...) \ 3281 btrfs_no_printk(fs_info, fmt, ##args) 3282 #endif 3283 3284 #define btrfs_emerg(fs_info, fmt, args...) \ 3285 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3286 #define btrfs_alert(fs_info, fmt, args...) \ 3287 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3288 #define btrfs_crit(fs_info, fmt, args...) \ 3289 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3290 #define btrfs_err(fs_info, fmt, args...) \ 3291 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3292 #define btrfs_warn(fs_info, fmt, args...) \ 3293 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3294 #define btrfs_notice(fs_info, fmt, args...) \ 3295 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3296 #define btrfs_info(fs_info, fmt, args...) \ 3297 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3298 3299 /* 3300 * Wrappers that use printk_in_rcu 3301 */ 3302 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3303 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3304 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3305 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3306 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3307 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3308 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3309 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3310 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3311 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3312 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3313 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3314 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3315 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3316 3317 /* 3318 * Wrappers that use a ratelimited printk_in_rcu 3319 */ 3320 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3321 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3322 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3323 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3324 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3326 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3327 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3328 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3329 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3330 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3331 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3332 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3333 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3334 3335 /* 3336 * Wrappers that use a ratelimited printk 3337 */ 3338 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3339 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3340 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3341 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3342 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3343 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3344 #define btrfs_err_rl(fs_info, fmt, args...) \ 3345 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3346 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3347 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3348 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3349 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3350 #define btrfs_info_rl(fs_info, fmt, args...) \ 3351 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3352 3353 #if defined(CONFIG_DYNAMIC_DEBUG) 3354 #define btrfs_debug(fs_info, fmt, args...) \ 3355 do { \ 3356 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3357 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3358 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3359 } while (0) 3360 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3361 do { \ 3362 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3363 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3364 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3365 } while (0) 3366 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3367 do { \ 3368 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3369 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3370 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3371 ##args);\ 3372 } while (0) 3373 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3374 do { \ 3375 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3376 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3377 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3378 ##args); \ 3379 } while (0) 3380 #elif defined(DEBUG) 3381 #define btrfs_debug(fs_info, fmt, args...) \ 3382 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3383 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3384 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3385 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3386 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3387 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3388 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3389 #else 3390 #define btrfs_debug(fs_info, fmt, args...) \ 3391 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3392 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3393 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3394 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3395 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3396 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3397 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3398 #endif 3399 3400 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3401 do { \ 3402 rcu_read_lock(); \ 3403 btrfs_printk(fs_info, fmt, ##args); \ 3404 rcu_read_unlock(); \ 3405 } while (0) 3406 3407 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3408 do { \ 3409 static DEFINE_RATELIMIT_STATE(_rs, \ 3410 DEFAULT_RATELIMIT_INTERVAL, \ 3411 DEFAULT_RATELIMIT_BURST); \ 3412 if (__ratelimit(&_rs)) \ 3413 btrfs_printk(fs_info, fmt, ##args); \ 3414 } while (0) 3415 3416 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3417 do { \ 3418 rcu_read_lock(); \ 3419 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3420 rcu_read_unlock(); \ 3421 } while (0) 3422 3423 #ifdef CONFIG_BTRFS_ASSERT 3424 3425 __cold 3426 static inline void assfail(const char *expr, const char *file, int line) 3427 { 3428 pr_err("assertion failed: %s, file: %s, line: %d\n", 3429 expr, file, line); 3430 BUG(); 3431 } 3432 3433 #define ASSERT(expr) \ 3434 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3435 #else 3436 #define ASSERT(expr) ((void)0) 3437 #endif 3438 3439 __cold 3440 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3441 { 3442 btrfs_err(fs_info, 3443 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3444 } 3445 3446 __printf(5, 6) 3447 __cold 3448 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3449 unsigned int line, int errno, const char *fmt, ...); 3450 3451 const char *btrfs_decode_error(int errno); 3452 3453 __cold 3454 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3455 const char *function, 3456 unsigned int line, int errno); 3457 3458 /* 3459 * Call btrfs_abort_transaction as early as possible when an error condition is 3460 * detected, that way the exact line number is reported. 3461 */ 3462 #define btrfs_abort_transaction(trans, errno) \ 3463 do { \ 3464 /* Report first abort since mount */ \ 3465 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3466 &((trans)->fs_info->fs_state))) { \ 3467 if ((errno) != -EIO) { \ 3468 WARN(1, KERN_DEBUG \ 3469 "BTRFS: Transaction aborted (error %d)\n", \ 3470 (errno)); \ 3471 } else { \ 3472 btrfs_debug((trans)->fs_info, \ 3473 "Transaction aborted (error %d)", \ 3474 (errno)); \ 3475 } \ 3476 } \ 3477 __btrfs_abort_transaction((trans), __func__, \ 3478 __LINE__, (errno)); \ 3479 } while (0) 3480 3481 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3482 do { \ 3483 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3484 (errno), fmt, ##args); \ 3485 } while (0) 3486 3487 __printf(5, 6) 3488 __cold 3489 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3490 unsigned int line, int errno, const char *fmt, ...); 3491 /* 3492 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3493 * will panic(). Otherwise we BUG() here. 3494 */ 3495 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3496 do { \ 3497 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3498 BUG(); \ 3499 } while (0) 3500 3501 3502 /* compatibility and incompatibility defines */ 3503 3504 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3505 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3506 3507 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3508 u64 flag) 3509 { 3510 struct btrfs_super_block *disk_super; 3511 u64 features; 3512 3513 disk_super = fs_info->super_copy; 3514 features = btrfs_super_incompat_flags(disk_super); 3515 if (!(features & flag)) { 3516 spin_lock(&fs_info->super_lock); 3517 features = btrfs_super_incompat_flags(disk_super); 3518 if (!(features & flag)) { 3519 features |= flag; 3520 btrfs_set_super_incompat_flags(disk_super, features); 3521 btrfs_info(fs_info, "setting %llu feature flag", 3522 flag); 3523 } 3524 spin_unlock(&fs_info->super_lock); 3525 } 3526 } 3527 3528 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3529 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3530 3531 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3532 u64 flag) 3533 { 3534 struct btrfs_super_block *disk_super; 3535 u64 features; 3536 3537 disk_super = fs_info->super_copy; 3538 features = btrfs_super_incompat_flags(disk_super); 3539 if (features & flag) { 3540 spin_lock(&fs_info->super_lock); 3541 features = btrfs_super_incompat_flags(disk_super); 3542 if (features & flag) { 3543 features &= ~flag; 3544 btrfs_set_super_incompat_flags(disk_super, features); 3545 btrfs_info(fs_info, "clearing %llu feature flag", 3546 flag); 3547 } 3548 spin_unlock(&fs_info->super_lock); 3549 } 3550 } 3551 3552 #define btrfs_fs_incompat(fs_info, opt) \ 3553 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3554 3555 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3556 { 3557 struct btrfs_super_block *disk_super; 3558 disk_super = fs_info->super_copy; 3559 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3560 } 3561 3562 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3563 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3564 3565 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3566 u64 flag) 3567 { 3568 struct btrfs_super_block *disk_super; 3569 u64 features; 3570 3571 disk_super = fs_info->super_copy; 3572 features = btrfs_super_compat_ro_flags(disk_super); 3573 if (!(features & flag)) { 3574 spin_lock(&fs_info->super_lock); 3575 features = btrfs_super_compat_ro_flags(disk_super); 3576 if (!(features & flag)) { 3577 features |= flag; 3578 btrfs_set_super_compat_ro_flags(disk_super, features); 3579 btrfs_info(fs_info, "setting %llu ro feature flag", 3580 flag); 3581 } 3582 spin_unlock(&fs_info->super_lock); 3583 } 3584 } 3585 3586 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3587 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3588 3589 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3590 u64 flag) 3591 { 3592 struct btrfs_super_block *disk_super; 3593 u64 features; 3594 3595 disk_super = fs_info->super_copy; 3596 features = btrfs_super_compat_ro_flags(disk_super); 3597 if (features & flag) { 3598 spin_lock(&fs_info->super_lock); 3599 features = btrfs_super_compat_ro_flags(disk_super); 3600 if (features & flag) { 3601 features &= ~flag; 3602 btrfs_set_super_compat_ro_flags(disk_super, features); 3603 btrfs_info(fs_info, "clearing %llu ro feature flag", 3604 flag); 3605 } 3606 spin_unlock(&fs_info->super_lock); 3607 } 3608 } 3609 3610 #define btrfs_fs_compat_ro(fs_info, opt) \ 3611 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3612 3613 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3614 { 3615 struct btrfs_super_block *disk_super; 3616 disk_super = fs_info->super_copy; 3617 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3618 } 3619 3620 /* acl.c */ 3621 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3622 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3623 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3624 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3625 struct inode *inode, struct inode *dir); 3626 #else 3627 #define btrfs_get_acl NULL 3628 #define btrfs_set_acl NULL 3629 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3630 struct inode *inode, struct inode *dir) 3631 { 3632 return 0; 3633 } 3634 #endif 3635 3636 /* relocation.c */ 3637 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3638 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3639 struct btrfs_root *root); 3640 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3641 struct btrfs_root *root); 3642 int btrfs_recover_relocation(struct btrfs_root *root); 3643 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3644 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3645 struct btrfs_root *root, struct extent_buffer *buf, 3646 struct extent_buffer *cow); 3647 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3648 u64 *bytes_to_reserve); 3649 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3650 struct btrfs_pending_snapshot *pending); 3651 3652 /* scrub.c */ 3653 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3654 u64 end, struct btrfs_scrub_progress *progress, 3655 int readonly, int is_dev_replace); 3656 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3657 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3658 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3659 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3660 struct btrfs_device *dev); 3661 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3662 struct btrfs_scrub_progress *progress); 3663 static inline void btrfs_init_full_stripe_locks_tree( 3664 struct btrfs_full_stripe_locks_tree *locks_root) 3665 { 3666 locks_root->root = RB_ROOT; 3667 mutex_init(&locks_root->lock); 3668 } 3669 3670 /* dev-replace.c */ 3671 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3672 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3673 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3674 3675 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3676 { 3677 btrfs_bio_counter_sub(fs_info, 1); 3678 } 3679 3680 /* reada.c */ 3681 struct reada_control { 3682 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3683 struct btrfs_key key_start; 3684 struct btrfs_key key_end; /* exclusive */ 3685 atomic_t elems; 3686 struct kref refcnt; 3687 wait_queue_head_t wait; 3688 }; 3689 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3690 struct btrfs_key *start, struct btrfs_key *end); 3691 int btrfs_reada_wait(void *handle); 3692 void btrfs_reada_detach(void *handle); 3693 int btree_readahead_hook(struct extent_buffer *eb, int err); 3694 3695 static inline int is_fstree(u64 rootid) 3696 { 3697 if (rootid == BTRFS_FS_TREE_OBJECTID || 3698 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3699 !btrfs_qgroup_level(rootid))) 3700 return 1; 3701 return 0; 3702 } 3703 3704 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3705 { 3706 return signal_pending(current); 3707 } 3708 3709 /* Sanity test specific functions */ 3710 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3711 void btrfs_test_destroy_inode(struct inode *inode); 3712 #endif 3713 3714 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3715 { 3716 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3717 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3718 &fs_info->fs_state))) 3719 return 1; 3720 #endif 3721 return 0; 3722 } 3723 3724 static inline void cond_wake_up(struct wait_queue_head *wq) 3725 { 3726 /* 3727 * This implies a full smp_mb barrier, see comments for 3728 * waitqueue_active why. 3729 */ 3730 if (wq_has_sleeper(wq)) 3731 wake_up(wq); 3732 } 3733 3734 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3735 { 3736 /* 3737 * Special case for conditional wakeup where the barrier required for 3738 * waitqueue_active is implied by some of the preceding code. Eg. one 3739 * of such atomic operations (atomic_dec_and_return, ...), or a 3740 * unlock/lock sequence, etc. 3741 */ 3742 if (waitqueue_active(wq)) 3743 wake_up(wq); 3744 } 3745 3746 #endif 3747