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 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 45 46 #define BTRFS_MAX_MIRRORS 3 47 48 #define BTRFS_MAX_LEVEL 8 49 50 #define BTRFS_OLDEST_GENERATION 0ULL 51 52 /* 53 * the max metadata block size. This limit is somewhat artificial, 54 * but the memmove costs go through the roof for larger blocks. 55 */ 56 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 57 58 /* 59 * we can actually store much bigger names, but lets not confuse the rest 60 * of linux 61 */ 62 #define BTRFS_NAME_LEN 255 63 64 /* 65 * Theoretical limit is larger, but we keep this down to a sane 66 * value. That should limit greatly the possibility of collisions on 67 * inode ref items. 68 */ 69 #define BTRFS_LINK_MAX 65535U 70 71 /* four bytes for CRC32 */ 72 static const int btrfs_csum_sizes[] = { 4 }; 73 74 #define BTRFS_EMPTY_DIR_SIZE 0 75 76 /* ioprio of readahead is set to idle */ 77 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 78 79 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 80 81 /* 82 * Use large batch size to reduce overhead of metadata updates. On the reader 83 * side, we only read it when we are close to ENOSPC and the read overhead is 84 * mostly related to the number of CPUs, so it is OK to use arbitrary large 85 * value here. 86 */ 87 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 88 89 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 90 91 92 /* 93 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 94 */ 95 static inline u32 count_max_extents(u64 size) 96 { 97 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 98 } 99 100 struct btrfs_mapping_tree { 101 struct extent_map_tree map_tree; 102 }; 103 104 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 105 { 106 BUG_ON(num_stripes == 0); 107 return sizeof(struct btrfs_chunk) + 108 sizeof(struct btrfs_stripe) * (num_stripes - 1); 109 } 110 111 /* 112 * Runtime (in-memory) states of filesystem 113 */ 114 enum { 115 /* Global indicator of serious filesystem errors */ 116 BTRFS_FS_STATE_ERROR, 117 /* 118 * Filesystem is being remounted, allow to skip some operations, like 119 * defrag 120 */ 121 BTRFS_FS_STATE_REMOUNTING, 122 /* Track if a transaction abort has been reported on this filesystem */ 123 BTRFS_FS_STATE_TRANS_ABORTED, 124 /* 125 * Bio operations should be blocked on this filesystem because a source 126 * or target device is being destroyed as part of a device replace 127 */ 128 BTRFS_FS_STATE_DEV_REPLACING, 129 /* The btrfs_fs_info created for self-tests */ 130 BTRFS_FS_STATE_DUMMY_FS_INFO, 131 }; 132 133 #define BTRFS_BACKREF_REV_MAX 256 134 #define BTRFS_BACKREF_REV_SHIFT 56 135 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 136 BTRFS_BACKREF_REV_SHIFT) 137 138 #define BTRFS_OLD_BACKREF_REV 0 139 #define BTRFS_MIXED_BACKREF_REV 1 140 141 /* 142 * every tree block (leaf or node) starts with this header. 143 */ 144 struct btrfs_header { 145 /* these first four must match the super block */ 146 u8 csum[BTRFS_CSUM_SIZE]; 147 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 148 __le64 bytenr; /* which block this node is supposed to live in */ 149 __le64 flags; 150 151 /* allowed to be different from the super from here on down */ 152 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 153 __le64 generation; 154 __le64 owner; 155 __le32 nritems; 156 u8 level; 157 } __attribute__ ((__packed__)); 158 159 /* 160 * this is a very generous portion of the super block, giving us 161 * room to translate 14 chunks with 3 stripes each. 162 */ 163 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 164 165 /* 166 * just in case we somehow lose the roots and are not able to mount, 167 * we store an array of the roots from previous transactions 168 * in the super. 169 */ 170 #define BTRFS_NUM_BACKUP_ROOTS 4 171 struct btrfs_root_backup { 172 __le64 tree_root; 173 __le64 tree_root_gen; 174 175 __le64 chunk_root; 176 __le64 chunk_root_gen; 177 178 __le64 extent_root; 179 __le64 extent_root_gen; 180 181 __le64 fs_root; 182 __le64 fs_root_gen; 183 184 __le64 dev_root; 185 __le64 dev_root_gen; 186 187 __le64 csum_root; 188 __le64 csum_root_gen; 189 190 __le64 total_bytes; 191 __le64 bytes_used; 192 __le64 num_devices; 193 /* future */ 194 __le64 unused_64[4]; 195 196 u8 tree_root_level; 197 u8 chunk_root_level; 198 u8 extent_root_level; 199 u8 fs_root_level; 200 u8 dev_root_level; 201 u8 csum_root_level; 202 /* future and to align */ 203 u8 unused_8[10]; 204 } __attribute__ ((__packed__)); 205 206 /* 207 * the super block basically lists the main trees of the FS 208 * it currently lacks any block count etc etc 209 */ 210 struct btrfs_super_block { 211 /* the first 4 fields must match struct btrfs_header */ 212 u8 csum[BTRFS_CSUM_SIZE]; 213 /* FS specific UUID, visible to user */ 214 u8 fsid[BTRFS_FSID_SIZE]; 215 __le64 bytenr; /* this block number */ 216 __le64 flags; 217 218 /* allowed to be different from the btrfs_header from here own down */ 219 __le64 magic; 220 __le64 generation; 221 __le64 root; 222 __le64 chunk_root; 223 __le64 log_root; 224 225 /* this will help find the new super based on the log root */ 226 __le64 log_root_transid; 227 __le64 total_bytes; 228 __le64 bytes_used; 229 __le64 root_dir_objectid; 230 __le64 num_devices; 231 __le32 sectorsize; 232 __le32 nodesize; 233 __le32 __unused_leafsize; 234 __le32 stripesize; 235 __le32 sys_chunk_array_size; 236 __le64 chunk_root_generation; 237 __le64 compat_flags; 238 __le64 compat_ro_flags; 239 __le64 incompat_flags; 240 __le16 csum_type; 241 u8 root_level; 242 u8 chunk_root_level; 243 u8 log_root_level; 244 struct btrfs_dev_item dev_item; 245 246 char label[BTRFS_LABEL_SIZE]; 247 248 __le64 cache_generation; 249 __le64 uuid_tree_generation; 250 251 /* the UUID written into btree blocks */ 252 u8 metadata_uuid[BTRFS_FSID_SIZE]; 253 254 /* future expansion */ 255 __le64 reserved[28]; 256 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 257 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 258 } __attribute__ ((__packed__)); 259 260 /* 261 * Compat flags that we support. If any incompat flags are set other than the 262 * ones specified below then we will fail to mount 263 */ 264 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 265 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 266 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 267 268 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 269 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 270 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 271 272 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 273 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 274 275 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 276 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 277 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 278 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 279 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 280 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 281 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 282 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 283 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 284 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 285 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 286 BTRFS_FEATURE_INCOMPAT_METADATA_UUID) 287 288 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 289 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 290 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 291 292 /* 293 * A leaf is full of items. offset and size tell us where to find 294 * the item in the leaf (relative to the start of the data area) 295 */ 296 struct btrfs_item { 297 struct btrfs_disk_key key; 298 __le32 offset; 299 __le32 size; 300 } __attribute__ ((__packed__)); 301 302 /* 303 * leaves have an item area and a data area: 304 * [item0, item1....itemN] [free space] [dataN...data1, data0] 305 * 306 * The data is separate from the items to get the keys closer together 307 * during searches. 308 */ 309 struct btrfs_leaf { 310 struct btrfs_header header; 311 struct btrfs_item items[]; 312 } __attribute__ ((__packed__)); 313 314 /* 315 * all non-leaf blocks are nodes, they hold only keys and pointers to 316 * other blocks 317 */ 318 struct btrfs_key_ptr { 319 struct btrfs_disk_key key; 320 __le64 blockptr; 321 __le64 generation; 322 } __attribute__ ((__packed__)); 323 324 struct btrfs_node { 325 struct btrfs_header header; 326 struct btrfs_key_ptr ptrs[]; 327 } __attribute__ ((__packed__)); 328 329 /* 330 * btrfs_paths remember the path taken from the root down to the leaf. 331 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 332 * to any other levels that are present. 333 * 334 * The slots array records the index of the item or block pointer 335 * used while walking the tree. 336 */ 337 enum { READA_NONE, READA_BACK, READA_FORWARD }; 338 struct btrfs_path { 339 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 340 int slots[BTRFS_MAX_LEVEL]; 341 /* if there is real range locking, this locks field will change */ 342 u8 locks[BTRFS_MAX_LEVEL]; 343 u8 reada; 344 /* keep some upper locks as we walk down */ 345 u8 lowest_level; 346 347 /* 348 * set by btrfs_split_item, tells search_slot to keep all locks 349 * and to force calls to keep space in the nodes 350 */ 351 unsigned int search_for_split:1; 352 unsigned int keep_locks:1; 353 unsigned int skip_locking:1; 354 unsigned int leave_spinning:1; 355 unsigned int search_commit_root:1; 356 unsigned int need_commit_sem:1; 357 unsigned int skip_release_on_error:1; 358 }; 359 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 360 sizeof(struct btrfs_item)) 361 struct btrfs_dev_replace { 362 u64 replace_state; /* see #define above */ 363 time64_t time_started; /* seconds since 1-Jan-1970 */ 364 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 365 atomic64_t num_write_errors; 366 atomic64_t num_uncorrectable_read_errors; 367 368 u64 cursor_left; 369 u64 committed_cursor_left; 370 u64 cursor_left_last_write_of_item; 371 u64 cursor_right; 372 373 u64 cont_reading_from_srcdev_mode; /* see #define above */ 374 375 int is_valid; 376 int item_needs_writeback; 377 struct btrfs_device *srcdev; 378 struct btrfs_device *tgtdev; 379 380 struct mutex lock_finishing_cancel_unmount; 381 struct rw_semaphore rwsem; 382 383 struct btrfs_scrub_progress scrub_progress; 384 385 struct percpu_counter bio_counter; 386 wait_queue_head_t replace_wait; 387 }; 388 389 /* For raid type sysfs entries */ 390 struct raid_kobject { 391 u64 flags; 392 struct kobject kobj; 393 struct list_head list; 394 }; 395 396 struct btrfs_space_info { 397 spinlock_t lock; 398 399 u64 total_bytes; /* total bytes in the space, 400 this doesn't take mirrors into account */ 401 u64 bytes_used; /* total bytes used, 402 this doesn't take mirrors into account */ 403 u64 bytes_pinned; /* total bytes pinned, will be freed when the 404 transaction finishes */ 405 u64 bytes_reserved; /* total bytes the allocator has reserved for 406 current allocations */ 407 u64 bytes_may_use; /* number of bytes that may be used for 408 delalloc/allocations */ 409 u64 bytes_readonly; /* total bytes that are read only */ 410 411 u64 max_extent_size; /* This will hold the maximum extent size of 412 the space info if we had an ENOSPC in the 413 allocator. */ 414 415 unsigned int full:1; /* indicates that we cannot allocate any more 416 chunks for this space */ 417 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 418 419 unsigned int flush:1; /* set if we are trying to make space */ 420 421 unsigned int force_alloc; /* set if we need to force a chunk 422 alloc for this space */ 423 424 u64 disk_used; /* total bytes used on disk */ 425 u64 disk_total; /* total bytes on disk, takes mirrors into 426 account */ 427 428 u64 flags; 429 430 /* 431 * bytes_pinned is kept in line with what is actually pinned, as in 432 * we've called update_block_group and dropped the bytes_used counter 433 * and increased the bytes_pinned counter. However this means that 434 * bytes_pinned does not reflect the bytes that will be pinned once the 435 * delayed refs are flushed, so this counter is inc'ed every time we 436 * call btrfs_free_extent so it is a realtime count of what will be 437 * freed once the transaction is committed. It will be zeroed every 438 * time the transaction commits. 439 */ 440 struct percpu_counter total_bytes_pinned; 441 442 struct list_head list; 443 /* Protected by the spinlock 'lock'. */ 444 struct list_head ro_bgs; 445 struct list_head priority_tickets; 446 struct list_head tickets; 447 /* 448 * tickets_id just indicates the next ticket will be handled, so note 449 * it's not stored per ticket. 450 */ 451 u64 tickets_id; 452 453 struct rw_semaphore groups_sem; 454 /* for block groups in our same type */ 455 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 456 wait_queue_head_t wait; 457 458 struct kobject kobj; 459 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 460 }; 461 462 /* 463 * Types of block reserves 464 */ 465 enum { 466 BTRFS_BLOCK_RSV_GLOBAL, 467 BTRFS_BLOCK_RSV_DELALLOC, 468 BTRFS_BLOCK_RSV_TRANS, 469 BTRFS_BLOCK_RSV_CHUNK, 470 BTRFS_BLOCK_RSV_DELOPS, 471 BTRFS_BLOCK_RSV_DELREFS, 472 BTRFS_BLOCK_RSV_EMPTY, 473 BTRFS_BLOCK_RSV_TEMP, 474 }; 475 476 struct btrfs_block_rsv { 477 u64 size; 478 u64 reserved; 479 struct btrfs_space_info *space_info; 480 spinlock_t lock; 481 unsigned short full; 482 unsigned short type; 483 unsigned short failfast; 484 485 /* 486 * Qgroup equivalent for @size @reserved 487 * 488 * Unlike normal @size/@reserved for inode rsv, qgroup doesn't care 489 * about things like csum size nor how many tree blocks it will need to 490 * reserve. 491 * 492 * Qgroup cares more about net change of the extent usage. 493 * 494 * So for one newly inserted file extent, in worst case it will cause 495 * leaf split and level increase, nodesize for each file extent is 496 * already too much. 497 * 498 * In short, qgroup_size/reserved is the upper limit of possible needed 499 * qgroup metadata reservation. 500 */ 501 u64 qgroup_rsv_size; 502 u64 qgroup_rsv_reserved; 503 }; 504 505 /* 506 * free clusters are used to claim free space in relatively large chunks, 507 * allowing us to do less seeky writes. They are used for all metadata 508 * allocations. In ssd_spread mode they are also used for data allocations. 509 */ 510 struct btrfs_free_cluster { 511 spinlock_t lock; 512 spinlock_t refill_lock; 513 struct rb_root root; 514 515 /* largest extent in this cluster */ 516 u64 max_size; 517 518 /* first extent starting offset */ 519 u64 window_start; 520 521 /* We did a full search and couldn't create a cluster */ 522 bool fragmented; 523 524 struct btrfs_block_group_cache *block_group; 525 /* 526 * when a cluster is allocated from a block group, we put the 527 * cluster onto a list in the block group so that it can 528 * be freed before the block group is freed. 529 */ 530 struct list_head block_group_list; 531 }; 532 533 enum btrfs_caching_type { 534 BTRFS_CACHE_NO, 535 BTRFS_CACHE_STARTED, 536 BTRFS_CACHE_FAST, 537 BTRFS_CACHE_FINISHED, 538 BTRFS_CACHE_ERROR, 539 }; 540 541 enum btrfs_disk_cache_state { 542 BTRFS_DC_WRITTEN, 543 BTRFS_DC_ERROR, 544 BTRFS_DC_CLEAR, 545 BTRFS_DC_SETUP, 546 }; 547 548 struct btrfs_caching_control { 549 struct list_head list; 550 struct mutex mutex; 551 wait_queue_head_t wait; 552 struct btrfs_work work; 553 struct btrfs_block_group_cache *block_group; 554 u64 progress; 555 refcount_t count; 556 }; 557 558 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 559 #define CACHING_CTL_WAKE_UP SZ_2M 560 561 struct btrfs_io_ctl { 562 void *cur, *orig; 563 struct page *page; 564 struct page **pages; 565 struct btrfs_fs_info *fs_info; 566 struct inode *inode; 567 unsigned long size; 568 int index; 569 int num_pages; 570 int entries; 571 int bitmaps; 572 unsigned check_crcs:1; 573 }; 574 575 /* 576 * Tree to record all locked full stripes of a RAID5/6 block group 577 */ 578 struct btrfs_full_stripe_locks_tree { 579 struct rb_root root; 580 struct mutex lock; 581 }; 582 583 struct btrfs_block_group_cache { 584 struct btrfs_key key; 585 struct btrfs_block_group_item item; 586 struct btrfs_fs_info *fs_info; 587 struct inode *inode; 588 spinlock_t lock; 589 u64 pinned; 590 u64 reserved; 591 u64 delalloc_bytes; 592 u64 bytes_super; 593 u64 flags; 594 u64 cache_generation; 595 596 /* 597 * If the free space extent count exceeds this number, convert the block 598 * group to bitmaps. 599 */ 600 u32 bitmap_high_thresh; 601 602 /* 603 * If the free space extent count drops below this number, convert the 604 * block group back to extents. 605 */ 606 u32 bitmap_low_thresh; 607 608 /* 609 * It is just used for the delayed data space allocation because 610 * only the data space allocation and the relative metadata update 611 * can be done cross the transaction. 612 */ 613 struct rw_semaphore data_rwsem; 614 615 /* for raid56, this is a full stripe, without parity */ 616 unsigned long full_stripe_len; 617 618 unsigned int ro; 619 unsigned int iref:1; 620 unsigned int has_caching_ctl:1; 621 unsigned int removed:1; 622 623 int disk_cache_state; 624 625 /* cache tracking stuff */ 626 int cached; 627 struct btrfs_caching_control *caching_ctl; 628 u64 last_byte_to_unpin; 629 630 struct btrfs_space_info *space_info; 631 632 /* free space cache stuff */ 633 struct btrfs_free_space_ctl *free_space_ctl; 634 635 /* block group cache stuff */ 636 struct rb_node cache_node; 637 638 /* for block groups in the same raid type */ 639 struct list_head list; 640 641 /* usage count */ 642 atomic_t count; 643 644 /* List of struct btrfs_free_clusters for this block group. 645 * Today it will only have one thing on it, but that may change 646 */ 647 struct list_head cluster_list; 648 649 /* For delayed block group creation or deletion of empty block groups */ 650 struct list_head bg_list; 651 652 /* For read-only block groups */ 653 struct list_head ro_list; 654 655 atomic_t trimming; 656 657 /* For dirty block groups */ 658 struct list_head dirty_list; 659 struct list_head io_list; 660 661 struct btrfs_io_ctl io_ctl; 662 663 /* 664 * Incremented when doing extent allocations and holding a read lock 665 * on the space_info's groups_sem semaphore. 666 * Decremented when an ordered extent that represents an IO against this 667 * block group's range is created (after it's added to its inode's 668 * root's list of ordered extents) or immediately after the allocation 669 * if it's a metadata extent or fallocate extent (for these cases we 670 * don't create ordered extents). 671 */ 672 atomic_t reservations; 673 674 /* 675 * Incremented while holding the spinlock *lock* by a task checking if 676 * it can perform a nocow write (incremented if the value for the *ro* 677 * field is 0). Decremented by such tasks once they create an ordered 678 * extent or before that if some error happens before reaching that step. 679 * This is to prevent races between block group relocation and nocow 680 * writes through direct IO. 681 */ 682 atomic_t nocow_writers; 683 684 /* Lock for free space tree operations. */ 685 struct mutex free_space_lock; 686 687 /* 688 * Does the block group need to be added to the free space tree? 689 * Protected by free_space_lock. 690 */ 691 int needs_free_space; 692 693 /* Record locked full stripes for RAID5/6 block group */ 694 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 695 }; 696 697 /* delayed seq elem */ 698 struct seq_list { 699 struct list_head list; 700 u64 seq; 701 }; 702 703 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 704 705 #define SEQ_LAST ((u64)-1) 706 707 enum btrfs_orphan_cleanup_state { 708 ORPHAN_CLEANUP_STARTED = 1, 709 ORPHAN_CLEANUP_DONE = 2, 710 }; 711 712 /* used by the raid56 code to lock stripes for read/modify/write */ 713 struct btrfs_stripe_hash { 714 struct list_head hash_list; 715 spinlock_t lock; 716 }; 717 718 /* used by the raid56 code to lock stripes for read/modify/write */ 719 struct btrfs_stripe_hash_table { 720 struct list_head stripe_cache; 721 spinlock_t cache_lock; 722 int cache_size; 723 struct btrfs_stripe_hash table[]; 724 }; 725 726 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 727 728 void btrfs_init_async_reclaim_work(struct work_struct *work); 729 730 /* fs_info */ 731 struct reloc_control; 732 struct btrfs_device; 733 struct btrfs_fs_devices; 734 struct btrfs_balance_control; 735 struct btrfs_delayed_root; 736 737 /* 738 * Block group or device which contains an active swapfile. Used for preventing 739 * unsafe operations while a swapfile is active. 740 * 741 * These are sorted on (ptr, inode) (note that a block group or device can 742 * contain more than one swapfile). We compare the pointer values because we 743 * don't actually care what the object is, we just need a quick check whether 744 * the object exists in the rbtree. 745 */ 746 struct btrfs_swapfile_pin { 747 struct rb_node node; 748 void *ptr; 749 struct inode *inode; 750 /* 751 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise, 752 * ptr points to a struct btrfs_device. 753 */ 754 bool is_block_group; 755 }; 756 757 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 758 759 enum { 760 BTRFS_FS_BARRIER, 761 BTRFS_FS_CLOSING_START, 762 BTRFS_FS_CLOSING_DONE, 763 BTRFS_FS_LOG_RECOVERING, 764 BTRFS_FS_OPEN, 765 BTRFS_FS_QUOTA_ENABLED, 766 BTRFS_FS_UPDATE_UUID_TREE_GEN, 767 BTRFS_FS_CREATING_FREE_SPACE_TREE, 768 BTRFS_FS_BTREE_ERR, 769 BTRFS_FS_LOG1_ERR, 770 BTRFS_FS_LOG2_ERR, 771 BTRFS_FS_QUOTA_OVERRIDE, 772 /* Used to record internally whether fs has been frozen */ 773 BTRFS_FS_FROZEN, 774 /* 775 * Indicate that a whole-filesystem exclusive operation is running 776 * (device replace, resize, device add/delete, balance) 777 */ 778 BTRFS_FS_EXCL_OP, 779 /* 780 * To info transaction_kthread we need an immediate commit so it 781 * doesn't need to wait for commit_interval 782 */ 783 BTRFS_FS_NEED_ASYNC_COMMIT, 784 /* 785 * Indicate that balance has been set up from the ioctl and is in the 786 * main phase. The fs_info::balance_ctl is initialized. 787 */ 788 BTRFS_FS_BALANCE_RUNNING, 789 }; 790 791 struct btrfs_fs_info { 792 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 793 unsigned long flags; 794 struct btrfs_root *extent_root; 795 struct btrfs_root *tree_root; 796 struct btrfs_root *chunk_root; 797 struct btrfs_root *dev_root; 798 struct btrfs_root *fs_root; 799 struct btrfs_root *csum_root; 800 struct btrfs_root *quota_root; 801 struct btrfs_root *uuid_root; 802 struct btrfs_root *free_space_root; 803 804 /* the log root tree is a directory of all the other log roots */ 805 struct btrfs_root *log_root_tree; 806 807 spinlock_t fs_roots_radix_lock; 808 struct radix_tree_root fs_roots_radix; 809 810 /* block group cache stuff */ 811 spinlock_t block_group_cache_lock; 812 u64 first_logical_byte; 813 struct rb_root block_group_cache_tree; 814 815 /* keep track of unallocated space */ 816 atomic64_t free_chunk_space; 817 818 struct extent_io_tree freed_extents[2]; 819 struct extent_io_tree *pinned_extents; 820 821 /* logical->physical extent mapping */ 822 struct btrfs_mapping_tree mapping_tree; 823 824 /* 825 * block reservation for extent, checksum, root tree and 826 * delayed dir index item 827 */ 828 struct btrfs_block_rsv global_block_rsv; 829 /* block reservation for metadata operations */ 830 struct btrfs_block_rsv trans_block_rsv; 831 /* block reservation for chunk tree */ 832 struct btrfs_block_rsv chunk_block_rsv; 833 /* block reservation for delayed operations */ 834 struct btrfs_block_rsv delayed_block_rsv; 835 /* block reservation for delayed refs */ 836 struct btrfs_block_rsv delayed_refs_rsv; 837 838 struct btrfs_block_rsv empty_block_rsv; 839 840 u64 generation; 841 u64 last_trans_committed; 842 u64 avg_delayed_ref_runtime; 843 844 /* 845 * this is updated to the current trans every time a full commit 846 * is required instead of the faster short fsync log commits 847 */ 848 u64 last_trans_log_full_commit; 849 unsigned long mount_opt; 850 /* 851 * Track requests for actions that need to be done during transaction 852 * commit (like for some mount options). 853 */ 854 unsigned long pending_changes; 855 unsigned long compress_type:4; 856 unsigned int compress_level; 857 u32 commit_interval; 858 /* 859 * It is a suggestive number, the read side is safe even it gets a 860 * wrong number because we will write out the data into a regular 861 * extent. The write side(mount/remount) is under ->s_umount lock, 862 * so it is also safe. 863 */ 864 u64 max_inline; 865 866 struct btrfs_transaction *running_transaction; 867 wait_queue_head_t transaction_throttle; 868 wait_queue_head_t transaction_wait; 869 wait_queue_head_t transaction_blocked_wait; 870 wait_queue_head_t async_submit_wait; 871 872 /* 873 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 874 * when they are updated. 875 * 876 * Because we do not clear the flags for ever, so we needn't use 877 * the lock on the read side. 878 * 879 * We also needn't use the lock when we mount the fs, because 880 * there is no other task which will update the flag. 881 */ 882 spinlock_t super_lock; 883 struct btrfs_super_block *super_copy; 884 struct btrfs_super_block *super_for_commit; 885 struct super_block *sb; 886 struct inode *btree_inode; 887 struct mutex tree_log_mutex; 888 struct mutex transaction_kthread_mutex; 889 struct mutex cleaner_mutex; 890 struct mutex chunk_mutex; 891 892 /* 893 * this is taken to make sure we don't set block groups ro after 894 * the free space cache has been allocated on them 895 */ 896 struct mutex ro_block_group_mutex; 897 898 /* this is used during read/modify/write to make sure 899 * no two ios are trying to mod the same stripe at the same 900 * time 901 */ 902 struct btrfs_stripe_hash_table *stripe_hash_table; 903 904 /* 905 * this protects the ordered operations list only while we are 906 * processing all of the entries on it. This way we make 907 * sure the commit code doesn't find the list temporarily empty 908 * because another function happens to be doing non-waiting preflush 909 * before jumping into the main commit. 910 */ 911 struct mutex ordered_operations_mutex; 912 913 struct rw_semaphore commit_root_sem; 914 915 struct rw_semaphore cleanup_work_sem; 916 917 struct rw_semaphore subvol_sem; 918 struct srcu_struct subvol_srcu; 919 920 spinlock_t trans_lock; 921 /* 922 * the reloc mutex goes with the trans lock, it is taken 923 * during commit to protect us from the relocation code 924 */ 925 struct mutex reloc_mutex; 926 927 struct list_head trans_list; 928 struct list_head dead_roots; 929 struct list_head caching_block_groups; 930 931 spinlock_t delayed_iput_lock; 932 struct list_head delayed_iputs; 933 struct mutex cleaner_delayed_iput_mutex; 934 935 /* this protects tree_mod_seq_list */ 936 spinlock_t tree_mod_seq_lock; 937 atomic64_t tree_mod_seq; 938 struct list_head tree_mod_seq_list; 939 940 /* this protects tree_mod_log */ 941 rwlock_t tree_mod_log_lock; 942 struct rb_root tree_mod_log; 943 944 atomic_t async_delalloc_pages; 945 946 /* 947 * this is used to protect the following list -- ordered_roots. 948 */ 949 spinlock_t ordered_root_lock; 950 951 /* 952 * all fs/file tree roots in which there are data=ordered extents 953 * pending writeback are added into this list. 954 * 955 * these can span multiple transactions and basically include 956 * every dirty data page that isn't from nodatacow 957 */ 958 struct list_head ordered_roots; 959 960 struct mutex delalloc_root_mutex; 961 spinlock_t delalloc_root_lock; 962 /* all fs/file tree roots that have delalloc inodes. */ 963 struct list_head delalloc_roots; 964 965 /* 966 * there is a pool of worker threads for checksumming during writes 967 * and a pool for checksumming after reads. This is because readers 968 * can run with FS locks held, and the writers may be waiting for 969 * those locks. We don't want ordering in the pending list to cause 970 * deadlocks, and so the two are serviced separately. 971 * 972 * A third pool does submit_bio to avoid deadlocking with the other 973 * two 974 */ 975 struct btrfs_workqueue *workers; 976 struct btrfs_workqueue *delalloc_workers; 977 struct btrfs_workqueue *flush_workers; 978 struct btrfs_workqueue *endio_workers; 979 struct btrfs_workqueue *endio_meta_workers; 980 struct btrfs_workqueue *endio_raid56_workers; 981 struct btrfs_workqueue *endio_repair_workers; 982 struct btrfs_workqueue *rmw_workers; 983 struct btrfs_workqueue *endio_meta_write_workers; 984 struct btrfs_workqueue *endio_write_workers; 985 struct btrfs_workqueue *endio_freespace_worker; 986 struct btrfs_workqueue *submit_workers; 987 struct btrfs_workqueue *caching_workers; 988 struct btrfs_workqueue *readahead_workers; 989 990 /* 991 * fixup workers take dirty pages that didn't properly go through 992 * the cow mechanism and make them safe to write. It happens 993 * for the sys_munmap function call path 994 */ 995 struct btrfs_workqueue *fixup_workers; 996 struct btrfs_workqueue *delayed_workers; 997 998 /* the extent workers do delayed refs on the extent allocation tree */ 999 struct btrfs_workqueue *extent_workers; 1000 struct task_struct *transaction_kthread; 1001 struct task_struct *cleaner_kthread; 1002 u32 thread_pool_size; 1003 1004 struct kobject *space_info_kobj; 1005 struct list_head pending_raid_kobjs; 1006 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 1007 1008 u64 total_pinned; 1009 1010 /* used to keep from writing metadata until there is a nice batch */ 1011 struct percpu_counter dirty_metadata_bytes; 1012 struct percpu_counter delalloc_bytes; 1013 s32 dirty_metadata_batch; 1014 s32 delalloc_batch; 1015 1016 struct list_head dirty_cowonly_roots; 1017 1018 struct btrfs_fs_devices *fs_devices; 1019 1020 /* 1021 * The space_info list is effectively read only after initial 1022 * setup. It is populated at mount time and cleaned up after 1023 * all block groups are removed. RCU is used to protect it. 1024 */ 1025 struct list_head space_info; 1026 1027 struct btrfs_space_info *data_sinfo; 1028 1029 struct reloc_control *reloc_ctl; 1030 1031 /* data_alloc_cluster is only used in ssd_spread mode */ 1032 struct btrfs_free_cluster data_alloc_cluster; 1033 1034 /* all metadata allocations go through this cluster */ 1035 struct btrfs_free_cluster meta_alloc_cluster; 1036 1037 /* auto defrag inodes go here */ 1038 spinlock_t defrag_inodes_lock; 1039 struct rb_root defrag_inodes; 1040 atomic_t defrag_running; 1041 1042 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 1043 seqlock_t profiles_lock; 1044 /* 1045 * these three are in extended format (availability of single 1046 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 1047 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 1048 */ 1049 u64 avail_data_alloc_bits; 1050 u64 avail_metadata_alloc_bits; 1051 u64 avail_system_alloc_bits; 1052 1053 /* restriper state */ 1054 spinlock_t balance_lock; 1055 struct mutex balance_mutex; 1056 atomic_t balance_pause_req; 1057 atomic_t balance_cancel_req; 1058 struct btrfs_balance_control *balance_ctl; 1059 wait_queue_head_t balance_wait_q; 1060 1061 u32 data_chunk_allocations; 1062 u32 metadata_ratio; 1063 1064 void *bdev_holder; 1065 1066 /* private scrub information */ 1067 struct mutex scrub_lock; 1068 atomic_t scrubs_running; 1069 atomic_t scrub_pause_req; 1070 atomic_t scrubs_paused; 1071 atomic_t scrub_cancel_req; 1072 wait_queue_head_t scrub_pause_wait; 1073 int scrub_workers_refcnt; 1074 struct btrfs_workqueue *scrub_workers; 1075 struct btrfs_workqueue *scrub_wr_completion_workers; 1076 struct btrfs_workqueue *scrub_nocow_workers; 1077 struct btrfs_workqueue *scrub_parity_workers; 1078 1079 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1080 u32 check_integrity_print_mask; 1081 #endif 1082 /* is qgroup tracking in a consistent state? */ 1083 u64 qgroup_flags; 1084 1085 /* holds configuration and tracking. Protected by qgroup_lock */ 1086 struct rb_root qgroup_tree; 1087 struct rb_root qgroup_op_tree; 1088 spinlock_t qgroup_lock; 1089 spinlock_t qgroup_op_lock; 1090 atomic_t qgroup_op_seq; 1091 1092 /* 1093 * used to avoid frequently calling ulist_alloc()/ulist_free() 1094 * when doing qgroup accounting, it must be protected by qgroup_lock. 1095 */ 1096 struct ulist *qgroup_ulist; 1097 1098 /* protect user change for quota operations */ 1099 struct mutex qgroup_ioctl_lock; 1100 1101 /* list of dirty qgroups to be written at next commit */ 1102 struct list_head dirty_qgroups; 1103 1104 /* used by qgroup for an efficient tree traversal */ 1105 u64 qgroup_seq; 1106 1107 /* qgroup rescan items */ 1108 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1109 struct btrfs_key qgroup_rescan_progress; 1110 struct btrfs_workqueue *qgroup_rescan_workers; 1111 struct completion qgroup_rescan_completion; 1112 struct btrfs_work qgroup_rescan_work; 1113 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1114 1115 /* filesystem state */ 1116 unsigned long fs_state; 1117 1118 struct btrfs_delayed_root *delayed_root; 1119 1120 /* readahead tree */ 1121 spinlock_t reada_lock; 1122 struct radix_tree_root reada_tree; 1123 1124 /* readahead works cnt */ 1125 atomic_t reada_works_cnt; 1126 1127 /* Extent buffer radix tree */ 1128 spinlock_t buffer_lock; 1129 struct radix_tree_root buffer_radix; 1130 1131 /* next backup root to be overwritten */ 1132 int backup_root_index; 1133 1134 /* device replace state */ 1135 struct btrfs_dev_replace dev_replace; 1136 1137 struct semaphore uuid_tree_rescan_sem; 1138 1139 /* Used to reclaim the metadata space in the background. */ 1140 struct work_struct async_reclaim_work; 1141 1142 spinlock_t unused_bgs_lock; 1143 struct list_head unused_bgs; 1144 struct mutex unused_bg_unpin_mutex; 1145 struct mutex delete_unused_bgs_mutex; 1146 1147 /* For btrfs to record security options */ 1148 struct security_mnt_opts security_opts; 1149 1150 /* 1151 * Chunks that can't be freed yet (under a trim/discard operation) 1152 * and will be latter freed. Protected by fs_info->chunk_mutex. 1153 */ 1154 struct list_head pinned_chunks; 1155 1156 /* Cached block sizes */ 1157 u32 nodesize; 1158 u32 sectorsize; 1159 u32 stripesize; 1160 1161 /* Block groups and devices containing active swapfiles. */ 1162 spinlock_t swapfile_pins_lock; 1163 struct rb_root swapfile_pins; 1164 1165 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1166 spinlock_t ref_verify_lock; 1167 struct rb_root block_tree; 1168 #endif 1169 }; 1170 1171 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1172 { 1173 return sb->s_fs_info; 1174 } 1175 1176 struct btrfs_subvolume_writers { 1177 struct percpu_counter counter; 1178 wait_queue_head_t wait; 1179 }; 1180 1181 /* 1182 * The state of btrfs root 1183 */ 1184 enum { 1185 /* 1186 * btrfs_record_root_in_trans is a multi-step process, and it can race 1187 * with the balancing code. But the race is very small, and only the 1188 * first time the root is added to each transaction. So IN_TRANS_SETUP 1189 * is used to tell us when more checks are required 1190 */ 1191 BTRFS_ROOT_IN_TRANS_SETUP, 1192 BTRFS_ROOT_REF_COWS, 1193 BTRFS_ROOT_TRACK_DIRTY, 1194 BTRFS_ROOT_IN_RADIX, 1195 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1196 BTRFS_ROOT_DEFRAG_RUNNING, 1197 BTRFS_ROOT_FORCE_COW, 1198 BTRFS_ROOT_MULTI_LOG_TASKS, 1199 BTRFS_ROOT_DIRTY, 1200 BTRFS_ROOT_DELETING, 1201 }; 1202 1203 /* 1204 * in ram representation of the tree. extent_root is used for all allocations 1205 * and for the extent tree extent_root root. 1206 */ 1207 struct btrfs_root { 1208 struct extent_buffer *node; 1209 1210 struct extent_buffer *commit_root; 1211 struct btrfs_root *log_root; 1212 struct btrfs_root *reloc_root; 1213 1214 unsigned long state; 1215 struct btrfs_root_item root_item; 1216 struct btrfs_key root_key; 1217 struct btrfs_fs_info *fs_info; 1218 struct extent_io_tree dirty_log_pages; 1219 1220 struct mutex objectid_mutex; 1221 1222 spinlock_t accounting_lock; 1223 struct btrfs_block_rsv *block_rsv; 1224 1225 /* free ino cache stuff */ 1226 struct btrfs_free_space_ctl *free_ino_ctl; 1227 enum btrfs_caching_type ino_cache_state; 1228 spinlock_t ino_cache_lock; 1229 wait_queue_head_t ino_cache_wait; 1230 struct btrfs_free_space_ctl *free_ino_pinned; 1231 u64 ino_cache_progress; 1232 struct inode *ino_cache_inode; 1233 1234 struct mutex log_mutex; 1235 wait_queue_head_t log_writer_wait; 1236 wait_queue_head_t log_commit_wait[2]; 1237 struct list_head log_ctxs[2]; 1238 atomic_t log_writers; 1239 atomic_t log_commit[2]; 1240 atomic_t log_batch; 1241 int log_transid; 1242 /* No matter the commit succeeds or not*/ 1243 int log_transid_committed; 1244 /* Just be updated when the commit succeeds. */ 1245 int last_log_commit; 1246 pid_t log_start_pid; 1247 1248 u64 last_trans; 1249 1250 u32 type; 1251 1252 u64 highest_objectid; 1253 1254 u64 defrag_trans_start; 1255 struct btrfs_key defrag_progress; 1256 struct btrfs_key defrag_max; 1257 1258 /* the dirty list is only used by non-reference counted roots */ 1259 struct list_head dirty_list; 1260 1261 struct list_head root_list; 1262 1263 spinlock_t log_extents_lock[2]; 1264 struct list_head logged_list[2]; 1265 1266 int orphan_cleanup_state; 1267 1268 spinlock_t inode_lock; 1269 /* red-black tree that keeps track of in-memory inodes */ 1270 struct rb_root inode_tree; 1271 1272 /* 1273 * radix tree that keeps track of delayed nodes of every inode, 1274 * protected by inode_lock 1275 */ 1276 struct radix_tree_root delayed_nodes_tree; 1277 /* 1278 * right now this just gets used so that a root has its own devid 1279 * for stat. It may be used for more later 1280 */ 1281 dev_t anon_dev; 1282 1283 spinlock_t root_item_lock; 1284 refcount_t refs; 1285 1286 struct mutex delalloc_mutex; 1287 spinlock_t delalloc_lock; 1288 /* 1289 * all of the inodes that have delalloc bytes. It is possible for 1290 * this list to be empty even when there is still dirty data=ordered 1291 * extents waiting to finish IO. 1292 */ 1293 struct list_head delalloc_inodes; 1294 struct list_head delalloc_root; 1295 u64 nr_delalloc_inodes; 1296 1297 struct mutex ordered_extent_mutex; 1298 /* 1299 * this is used by the balancing code to wait for all the pending 1300 * ordered extents 1301 */ 1302 spinlock_t ordered_extent_lock; 1303 1304 /* 1305 * all of the data=ordered extents pending writeback 1306 * these can span multiple transactions and basically include 1307 * every dirty data page that isn't from nodatacow 1308 */ 1309 struct list_head ordered_extents; 1310 struct list_head ordered_root; 1311 u64 nr_ordered_extents; 1312 1313 /* 1314 * Number of currently running SEND ioctls to prevent 1315 * manipulation with the read-only status via SUBVOL_SETFLAGS 1316 */ 1317 int send_in_progress; 1318 struct btrfs_subvolume_writers *subv_writers; 1319 atomic_t will_be_snapshotted; 1320 atomic_t snapshot_force_cow; 1321 1322 /* For qgroup metadata reserved space */ 1323 spinlock_t qgroup_meta_rsv_lock; 1324 u64 qgroup_meta_rsv_pertrans; 1325 u64 qgroup_meta_rsv_prealloc; 1326 1327 /* Number of active swapfiles */ 1328 atomic_t nr_swapfiles; 1329 1330 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1331 u64 alloc_bytenr; 1332 #endif 1333 }; 1334 1335 struct btrfs_file_private { 1336 void *filldir_buf; 1337 }; 1338 1339 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1340 { 1341 return btrfs_sb(inode->i_sb)->sectorsize; 1342 } 1343 1344 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1345 { 1346 1347 return info->nodesize - sizeof(struct btrfs_header); 1348 } 1349 1350 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1351 1352 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1353 { 1354 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1355 } 1356 1357 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1358 { 1359 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1360 } 1361 1362 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1363 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1364 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1365 { 1366 return BTRFS_MAX_ITEM_SIZE(info) - 1367 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1368 } 1369 1370 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1371 { 1372 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1373 } 1374 1375 /* 1376 * Flags for mount options. 1377 * 1378 * Note: don't forget to add new options to btrfs_show_options() 1379 */ 1380 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1381 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1382 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1383 #define BTRFS_MOUNT_SSD (1 << 3) 1384 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1385 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1386 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1387 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1388 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1389 #define BTRFS_MOUNT_NOSSD (1 << 9) 1390 #define BTRFS_MOUNT_DISCARD (1 << 10) 1391 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1392 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1393 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1394 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1395 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1396 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1397 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1398 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1399 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1400 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1401 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1402 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1403 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1404 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1405 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1406 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1407 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1408 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1409 1410 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1411 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1412 1413 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1414 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1415 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1416 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1417 BTRFS_MOUNT_##opt) 1418 1419 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1420 { \ 1421 if (!btrfs_test_opt(fs_info, opt)) \ 1422 btrfs_info(fs_info, fmt, ##args); \ 1423 btrfs_set_opt(fs_info->mount_opt, opt); \ 1424 } 1425 1426 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1427 { \ 1428 if (btrfs_test_opt(fs_info, opt)) \ 1429 btrfs_info(fs_info, fmt, ##args); \ 1430 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1431 } 1432 1433 #ifdef CONFIG_BTRFS_DEBUG 1434 static inline int 1435 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1436 { 1437 struct btrfs_fs_info *fs_info = block_group->fs_info; 1438 1439 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1440 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1441 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1442 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1443 } 1444 #endif 1445 1446 /* 1447 * Requests for changes that need to be done during transaction commit. 1448 * 1449 * Internal mount options that are used for special handling of the real 1450 * mount options (eg. cannot be set during remount and have to be set during 1451 * transaction commit) 1452 */ 1453 1454 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1455 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1456 #define BTRFS_PENDING_COMMIT (2) 1457 1458 #define btrfs_test_pending(info, opt) \ 1459 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1460 #define btrfs_set_pending(info, opt) \ 1461 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1462 #define btrfs_clear_pending(info, opt) \ 1463 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1464 1465 /* 1466 * Helpers for setting pending mount option changes. 1467 * 1468 * Expects corresponding macros 1469 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1470 */ 1471 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1472 do { \ 1473 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1474 btrfs_info((info), fmt, ##args); \ 1475 btrfs_set_pending((info), SET_##opt); \ 1476 btrfs_clear_pending((info), CLEAR_##opt); \ 1477 } \ 1478 } while(0) 1479 1480 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1481 do { \ 1482 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1483 btrfs_info((info), fmt, ##args); \ 1484 btrfs_set_pending((info), CLEAR_##opt); \ 1485 btrfs_clear_pending((info), SET_##opt); \ 1486 } \ 1487 } while(0) 1488 1489 /* 1490 * Inode flags 1491 */ 1492 #define BTRFS_INODE_NODATASUM (1 << 0) 1493 #define BTRFS_INODE_NODATACOW (1 << 1) 1494 #define BTRFS_INODE_READONLY (1 << 2) 1495 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1496 #define BTRFS_INODE_PREALLOC (1 << 4) 1497 #define BTRFS_INODE_SYNC (1 << 5) 1498 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1499 #define BTRFS_INODE_APPEND (1 << 7) 1500 #define BTRFS_INODE_NODUMP (1 << 8) 1501 #define BTRFS_INODE_NOATIME (1 << 9) 1502 #define BTRFS_INODE_DIRSYNC (1 << 10) 1503 #define BTRFS_INODE_COMPRESS (1 << 11) 1504 1505 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1506 1507 struct btrfs_map_token { 1508 const struct extent_buffer *eb; 1509 char *kaddr; 1510 unsigned long offset; 1511 }; 1512 1513 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1514 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1515 1516 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1517 { 1518 token->kaddr = NULL; 1519 } 1520 1521 /* some macros to generate set/get functions for the struct fields. This 1522 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1523 * one for u8: 1524 */ 1525 #define le8_to_cpu(v) (v) 1526 #define cpu_to_le8(v) (v) 1527 #define __le8 u8 1528 1529 #define read_eb_member(eb, ptr, type, member, result) (\ 1530 read_extent_buffer(eb, (char *)(result), \ 1531 ((unsigned long)(ptr)) + \ 1532 offsetof(type, member), \ 1533 sizeof(((type *)0)->member))) 1534 1535 #define write_eb_member(eb, ptr, type, member, result) (\ 1536 write_extent_buffer(eb, (char *)(result), \ 1537 ((unsigned long)(ptr)) + \ 1538 offsetof(type, member), \ 1539 sizeof(((type *)0)->member))) 1540 1541 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1542 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1543 const void *ptr, unsigned long off, \ 1544 struct btrfs_map_token *token); \ 1545 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1546 unsigned long off, u##bits val, \ 1547 struct btrfs_map_token *token); \ 1548 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1549 const void *ptr, \ 1550 unsigned long off) \ 1551 { \ 1552 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1553 } \ 1554 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1555 unsigned long off, u##bits val) \ 1556 { \ 1557 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1558 } 1559 1560 DECLARE_BTRFS_SETGET_BITS(8) 1561 DECLARE_BTRFS_SETGET_BITS(16) 1562 DECLARE_BTRFS_SETGET_BITS(32) 1563 DECLARE_BTRFS_SETGET_BITS(64) 1564 1565 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1566 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1567 const type *s) \ 1568 { \ 1569 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1570 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1571 } \ 1572 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1573 u##bits val) \ 1574 { \ 1575 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1576 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1577 } \ 1578 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1579 const type *s, \ 1580 struct btrfs_map_token *token) \ 1581 { \ 1582 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1583 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1584 } \ 1585 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1586 type *s, u##bits val, \ 1587 struct btrfs_map_token *token) \ 1588 { \ 1589 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1590 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1591 } 1592 1593 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1594 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1595 { \ 1596 const type *p = page_address(eb->pages[0]); \ 1597 u##bits res = le##bits##_to_cpu(p->member); \ 1598 return res; \ 1599 } \ 1600 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1601 u##bits val) \ 1602 { \ 1603 type *p = page_address(eb->pages[0]); \ 1604 p->member = cpu_to_le##bits(val); \ 1605 } 1606 1607 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1608 static inline u##bits btrfs_##name(const type *s) \ 1609 { \ 1610 return le##bits##_to_cpu(s->member); \ 1611 } \ 1612 static inline void btrfs_set_##name(type *s, u##bits val) \ 1613 { \ 1614 s->member = cpu_to_le##bits(val); \ 1615 } 1616 1617 1618 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1619 struct btrfs_dev_item *s) 1620 { 1621 BUILD_BUG_ON(sizeof(u64) != 1622 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1623 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1624 total_bytes)); 1625 } 1626 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1627 struct btrfs_dev_item *s, 1628 u64 val) 1629 { 1630 BUILD_BUG_ON(sizeof(u64) != 1631 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1632 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1633 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1634 } 1635 1636 1637 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1638 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1639 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1640 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1641 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1642 start_offset, 64); 1643 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1644 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1645 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1646 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1647 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1648 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1649 1650 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1651 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1652 total_bytes, 64); 1653 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1654 bytes_used, 64); 1655 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1656 io_align, 32); 1657 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1658 io_width, 32); 1659 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1660 sector_size, 32); 1661 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1662 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1663 dev_group, 32); 1664 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1665 seek_speed, 8); 1666 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1667 bandwidth, 8); 1668 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1669 generation, 64); 1670 1671 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1672 { 1673 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1674 } 1675 1676 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1677 { 1678 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1679 } 1680 1681 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1682 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1683 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1684 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1685 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1686 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1687 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1688 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1689 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1690 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1691 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1692 1693 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1694 { 1695 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1696 } 1697 1698 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1699 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1700 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1701 stripe_len, 64); 1702 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1703 io_align, 32); 1704 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1705 io_width, 32); 1706 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1707 sector_size, 32); 1708 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1709 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1710 num_stripes, 16); 1711 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1712 sub_stripes, 16); 1713 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1714 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1715 1716 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1717 int nr) 1718 { 1719 unsigned long offset = (unsigned long)c; 1720 offset += offsetof(struct btrfs_chunk, stripe); 1721 offset += nr * sizeof(struct btrfs_stripe); 1722 return (struct btrfs_stripe *)offset; 1723 } 1724 1725 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1726 { 1727 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1728 } 1729 1730 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1731 struct btrfs_chunk *c, int nr) 1732 { 1733 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1734 } 1735 1736 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1737 struct btrfs_chunk *c, int nr) 1738 { 1739 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1740 } 1741 1742 /* struct btrfs_block_group_item */ 1743 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1744 used, 64); 1745 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1746 used, 64); 1747 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1748 struct btrfs_block_group_item, chunk_objectid, 64); 1749 1750 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1751 struct btrfs_block_group_item, chunk_objectid, 64); 1752 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1753 struct btrfs_block_group_item, flags, 64); 1754 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1755 struct btrfs_block_group_item, flags, 64); 1756 1757 /* struct btrfs_free_space_info */ 1758 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1759 extent_count, 32); 1760 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1761 1762 /* struct btrfs_inode_ref */ 1763 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1764 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1765 1766 /* struct btrfs_inode_extref */ 1767 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1768 parent_objectid, 64); 1769 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1770 name_len, 16); 1771 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1772 1773 /* struct btrfs_inode_item */ 1774 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1775 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1776 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1777 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1778 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1779 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1780 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1781 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1782 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1783 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1784 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1785 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1786 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1787 generation, 64); 1788 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1789 sequence, 64); 1790 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1791 transid, 64); 1792 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1793 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1794 nbytes, 64); 1795 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1796 block_group, 64); 1797 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1798 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1799 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1800 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1801 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1802 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1803 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1804 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1805 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1806 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1807 1808 /* struct btrfs_dev_extent */ 1809 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1810 chunk_tree, 64); 1811 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1812 chunk_objectid, 64); 1813 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1814 chunk_offset, 64); 1815 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1816 1817 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1818 { 1819 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1820 return (unsigned long)dev + ptr; 1821 } 1822 1823 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1824 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1825 generation, 64); 1826 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1827 1828 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1829 1830 1831 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1832 1833 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1834 struct btrfs_tree_block_info *item, 1835 struct btrfs_disk_key *key) 1836 { 1837 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1838 } 1839 1840 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1841 struct btrfs_tree_block_info *item, 1842 struct btrfs_disk_key *key) 1843 { 1844 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1845 } 1846 1847 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1848 root, 64); 1849 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1850 objectid, 64); 1851 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1852 offset, 64); 1853 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1854 count, 32); 1855 1856 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1857 count, 32); 1858 1859 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1860 type, 8); 1861 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1862 offset, 64); 1863 1864 static inline u32 btrfs_extent_inline_ref_size(int type) 1865 { 1866 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1867 type == BTRFS_SHARED_BLOCK_REF_KEY) 1868 return sizeof(struct btrfs_extent_inline_ref); 1869 if (type == BTRFS_SHARED_DATA_REF_KEY) 1870 return sizeof(struct btrfs_shared_data_ref) + 1871 sizeof(struct btrfs_extent_inline_ref); 1872 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1873 return sizeof(struct btrfs_extent_data_ref) + 1874 offsetof(struct btrfs_extent_inline_ref, offset); 1875 return 0; 1876 } 1877 1878 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1879 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1880 generation, 64); 1881 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1882 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1883 1884 /* struct btrfs_node */ 1885 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1886 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1887 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1888 blockptr, 64); 1889 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1890 generation, 64); 1891 1892 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1893 { 1894 unsigned long ptr; 1895 ptr = offsetof(struct btrfs_node, ptrs) + 1896 sizeof(struct btrfs_key_ptr) * nr; 1897 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1898 } 1899 1900 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1901 int nr, u64 val) 1902 { 1903 unsigned long ptr; 1904 ptr = offsetof(struct btrfs_node, ptrs) + 1905 sizeof(struct btrfs_key_ptr) * nr; 1906 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1907 } 1908 1909 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1910 { 1911 unsigned long ptr; 1912 ptr = offsetof(struct btrfs_node, ptrs) + 1913 sizeof(struct btrfs_key_ptr) * nr; 1914 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1915 } 1916 1917 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1918 int nr, u64 val) 1919 { 1920 unsigned long ptr; 1921 ptr = offsetof(struct btrfs_node, ptrs) + 1922 sizeof(struct btrfs_key_ptr) * nr; 1923 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1924 } 1925 1926 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1927 { 1928 return offsetof(struct btrfs_node, ptrs) + 1929 sizeof(struct btrfs_key_ptr) * nr; 1930 } 1931 1932 void btrfs_node_key(const struct extent_buffer *eb, 1933 struct btrfs_disk_key *disk_key, int nr); 1934 1935 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1936 struct btrfs_disk_key *disk_key, int nr) 1937 { 1938 unsigned long ptr; 1939 ptr = btrfs_node_key_ptr_offset(nr); 1940 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1941 struct btrfs_key_ptr, key, disk_key); 1942 } 1943 1944 /* struct btrfs_item */ 1945 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1946 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1947 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1948 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1949 1950 static inline unsigned long btrfs_item_nr_offset(int nr) 1951 { 1952 return offsetof(struct btrfs_leaf, items) + 1953 sizeof(struct btrfs_item) * nr; 1954 } 1955 1956 static inline struct btrfs_item *btrfs_item_nr(int nr) 1957 { 1958 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1959 } 1960 1961 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1962 struct btrfs_item *item) 1963 { 1964 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1965 } 1966 1967 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1968 { 1969 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1970 } 1971 1972 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1973 { 1974 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1975 } 1976 1977 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1978 { 1979 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1980 } 1981 1982 static inline void btrfs_item_key(const struct extent_buffer *eb, 1983 struct btrfs_disk_key *disk_key, int nr) 1984 { 1985 struct btrfs_item *item = btrfs_item_nr(nr); 1986 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1987 } 1988 1989 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1990 struct btrfs_disk_key *disk_key, int nr) 1991 { 1992 struct btrfs_item *item = btrfs_item_nr(nr); 1993 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1994 } 1995 1996 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1997 1998 /* 1999 * struct btrfs_root_ref 2000 */ 2001 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 2002 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 2003 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 2004 2005 /* struct btrfs_dir_item */ 2006 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 2007 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 2008 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 2009 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 2010 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 2011 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 2012 data_len, 16); 2013 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 2014 name_len, 16); 2015 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 2016 transid, 64); 2017 2018 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 2019 const struct btrfs_dir_item *item, 2020 struct btrfs_disk_key *key) 2021 { 2022 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 2023 } 2024 2025 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 2026 struct btrfs_dir_item *item, 2027 const struct btrfs_disk_key *key) 2028 { 2029 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 2030 } 2031 2032 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 2033 num_entries, 64); 2034 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 2035 num_bitmaps, 64); 2036 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 2037 generation, 64); 2038 2039 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 2040 const struct btrfs_free_space_header *h, 2041 struct btrfs_disk_key *key) 2042 { 2043 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2044 } 2045 2046 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 2047 struct btrfs_free_space_header *h, 2048 const struct btrfs_disk_key *key) 2049 { 2050 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2051 } 2052 2053 /* struct btrfs_disk_key */ 2054 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2055 objectid, 64); 2056 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2057 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2058 2059 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2060 const struct btrfs_disk_key *disk) 2061 { 2062 cpu->offset = le64_to_cpu(disk->offset); 2063 cpu->type = disk->type; 2064 cpu->objectid = le64_to_cpu(disk->objectid); 2065 } 2066 2067 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2068 const struct btrfs_key *cpu) 2069 { 2070 disk->offset = cpu_to_le64(cpu->offset); 2071 disk->type = cpu->type; 2072 disk->objectid = cpu_to_le64(cpu->objectid); 2073 } 2074 2075 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2076 struct btrfs_key *key, int nr) 2077 { 2078 struct btrfs_disk_key disk_key; 2079 btrfs_node_key(eb, &disk_key, nr); 2080 btrfs_disk_key_to_cpu(key, &disk_key); 2081 } 2082 2083 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2084 struct btrfs_key *key, int nr) 2085 { 2086 struct btrfs_disk_key disk_key; 2087 btrfs_item_key(eb, &disk_key, nr); 2088 btrfs_disk_key_to_cpu(key, &disk_key); 2089 } 2090 2091 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2092 const struct btrfs_dir_item *item, 2093 struct btrfs_key *key) 2094 { 2095 struct btrfs_disk_key disk_key; 2096 btrfs_dir_item_key(eb, item, &disk_key); 2097 btrfs_disk_key_to_cpu(key, &disk_key); 2098 } 2099 2100 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2101 { 2102 return key->type; 2103 } 2104 2105 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2106 { 2107 key->type = val; 2108 } 2109 2110 /* struct btrfs_header */ 2111 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2112 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2113 generation, 64); 2114 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2115 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2116 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2117 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2118 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2119 generation, 64); 2120 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2121 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2122 nritems, 32); 2123 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2124 2125 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2126 { 2127 return (btrfs_header_flags(eb) & flag) == flag; 2128 } 2129 2130 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2131 { 2132 u64 flags = btrfs_header_flags(eb); 2133 btrfs_set_header_flags(eb, flags | flag); 2134 return (flags & flag) == flag; 2135 } 2136 2137 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2138 { 2139 u64 flags = btrfs_header_flags(eb); 2140 btrfs_set_header_flags(eb, flags & ~flag); 2141 return (flags & flag) == flag; 2142 } 2143 2144 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2145 { 2146 u64 flags = btrfs_header_flags(eb); 2147 return flags >> BTRFS_BACKREF_REV_SHIFT; 2148 } 2149 2150 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2151 int rev) 2152 { 2153 u64 flags = btrfs_header_flags(eb); 2154 flags &= ~BTRFS_BACKREF_REV_MASK; 2155 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2156 btrfs_set_header_flags(eb, flags); 2157 } 2158 2159 static inline unsigned long btrfs_header_fsid(void) 2160 { 2161 return offsetof(struct btrfs_header, fsid); 2162 } 2163 2164 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2165 { 2166 return offsetof(struct btrfs_header, chunk_tree_uuid); 2167 } 2168 2169 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2170 { 2171 return btrfs_header_level(eb) == 0; 2172 } 2173 2174 /* struct btrfs_root_item */ 2175 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2176 generation, 64); 2177 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2178 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2179 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2180 2181 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2182 generation, 64); 2183 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2184 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2185 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2186 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2187 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2188 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2189 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2190 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2191 last_snapshot, 64); 2192 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2193 generation_v2, 64); 2194 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2195 ctransid, 64); 2196 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2197 otransid, 64); 2198 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2199 stransid, 64); 2200 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2201 rtransid, 64); 2202 2203 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2204 { 2205 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2206 } 2207 2208 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2209 { 2210 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2211 } 2212 2213 /* struct btrfs_root_backup */ 2214 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2215 tree_root, 64); 2216 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2217 tree_root_gen, 64); 2218 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2219 tree_root_level, 8); 2220 2221 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2222 chunk_root, 64); 2223 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2224 chunk_root_gen, 64); 2225 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2226 chunk_root_level, 8); 2227 2228 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2229 extent_root, 64); 2230 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2231 extent_root_gen, 64); 2232 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2233 extent_root_level, 8); 2234 2235 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2236 fs_root, 64); 2237 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2238 fs_root_gen, 64); 2239 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2240 fs_root_level, 8); 2241 2242 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2243 dev_root, 64); 2244 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2245 dev_root_gen, 64); 2246 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2247 dev_root_level, 8); 2248 2249 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2250 csum_root, 64); 2251 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2252 csum_root_gen, 64); 2253 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2254 csum_root_level, 8); 2255 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2256 total_bytes, 64); 2257 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2258 bytes_used, 64); 2259 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2260 num_devices, 64); 2261 2262 /* struct btrfs_balance_item */ 2263 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2264 2265 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2266 const struct btrfs_balance_item *bi, 2267 struct btrfs_disk_balance_args *ba) 2268 { 2269 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2270 } 2271 2272 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2273 struct btrfs_balance_item *bi, 2274 const struct btrfs_disk_balance_args *ba) 2275 { 2276 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2277 } 2278 2279 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2280 const struct btrfs_balance_item *bi, 2281 struct btrfs_disk_balance_args *ba) 2282 { 2283 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2284 } 2285 2286 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2287 struct btrfs_balance_item *bi, 2288 const struct btrfs_disk_balance_args *ba) 2289 { 2290 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2291 } 2292 2293 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2294 const struct btrfs_balance_item *bi, 2295 struct btrfs_disk_balance_args *ba) 2296 { 2297 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2298 } 2299 2300 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2301 struct btrfs_balance_item *bi, 2302 const struct btrfs_disk_balance_args *ba) 2303 { 2304 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2305 } 2306 2307 static inline void 2308 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2309 const struct btrfs_disk_balance_args *disk) 2310 { 2311 memset(cpu, 0, sizeof(*cpu)); 2312 2313 cpu->profiles = le64_to_cpu(disk->profiles); 2314 cpu->usage = le64_to_cpu(disk->usage); 2315 cpu->devid = le64_to_cpu(disk->devid); 2316 cpu->pstart = le64_to_cpu(disk->pstart); 2317 cpu->pend = le64_to_cpu(disk->pend); 2318 cpu->vstart = le64_to_cpu(disk->vstart); 2319 cpu->vend = le64_to_cpu(disk->vend); 2320 cpu->target = le64_to_cpu(disk->target); 2321 cpu->flags = le64_to_cpu(disk->flags); 2322 cpu->limit = le64_to_cpu(disk->limit); 2323 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2324 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2325 } 2326 2327 static inline void 2328 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2329 const struct btrfs_balance_args *cpu) 2330 { 2331 memset(disk, 0, sizeof(*disk)); 2332 2333 disk->profiles = cpu_to_le64(cpu->profiles); 2334 disk->usage = cpu_to_le64(cpu->usage); 2335 disk->devid = cpu_to_le64(cpu->devid); 2336 disk->pstart = cpu_to_le64(cpu->pstart); 2337 disk->pend = cpu_to_le64(cpu->pend); 2338 disk->vstart = cpu_to_le64(cpu->vstart); 2339 disk->vend = cpu_to_le64(cpu->vend); 2340 disk->target = cpu_to_le64(cpu->target); 2341 disk->flags = cpu_to_le64(cpu->flags); 2342 disk->limit = cpu_to_le64(cpu->limit); 2343 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2344 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2345 } 2346 2347 /* struct btrfs_super_block */ 2348 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2349 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2350 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2351 generation, 64); 2352 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2353 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2354 struct btrfs_super_block, sys_chunk_array_size, 32); 2355 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2356 struct btrfs_super_block, chunk_root_generation, 64); 2357 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2358 root_level, 8); 2359 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2360 chunk_root, 64); 2361 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2362 chunk_root_level, 8); 2363 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2364 log_root, 64); 2365 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2366 log_root_transid, 64); 2367 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2368 log_root_level, 8); 2369 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2370 total_bytes, 64); 2371 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2372 bytes_used, 64); 2373 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2374 sectorsize, 32); 2375 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2376 nodesize, 32); 2377 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2378 stripesize, 32); 2379 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2380 root_dir_objectid, 64); 2381 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2382 num_devices, 64); 2383 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2384 compat_flags, 64); 2385 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2386 compat_ro_flags, 64); 2387 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2388 incompat_flags, 64); 2389 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2390 csum_type, 16); 2391 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2392 cache_generation, 64); 2393 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2394 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2395 uuid_tree_generation, 64); 2396 2397 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2398 { 2399 u16 t = btrfs_super_csum_type(s); 2400 /* 2401 * csum type is validated at mount time 2402 */ 2403 return btrfs_csum_sizes[t]; 2404 } 2405 2406 2407 /* 2408 * The leaf data grows from end-to-front in the node. 2409 * this returns the address of the start of the last item, 2410 * which is the stop of the leaf data stack 2411 */ 2412 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2413 const struct extent_buffer *leaf) 2414 { 2415 u32 nr = btrfs_header_nritems(leaf); 2416 2417 if (nr == 0) 2418 return BTRFS_LEAF_DATA_SIZE(fs_info); 2419 return btrfs_item_offset_nr(leaf, nr - 1); 2420 } 2421 2422 /* struct btrfs_file_extent_item */ 2423 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2424 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2425 struct btrfs_file_extent_item, disk_bytenr, 64); 2426 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2427 struct btrfs_file_extent_item, offset, 64); 2428 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2429 struct btrfs_file_extent_item, generation, 64); 2430 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2431 struct btrfs_file_extent_item, num_bytes, 64); 2432 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2433 struct btrfs_file_extent_item, disk_num_bytes, 64); 2434 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2435 struct btrfs_file_extent_item, compression, 8); 2436 2437 static inline unsigned long 2438 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2439 { 2440 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2441 } 2442 2443 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2444 { 2445 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2446 } 2447 2448 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2449 disk_bytenr, 64); 2450 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2451 generation, 64); 2452 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2453 disk_num_bytes, 64); 2454 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2455 offset, 64); 2456 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2457 num_bytes, 64); 2458 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2459 ram_bytes, 64); 2460 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2461 compression, 8); 2462 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2463 encryption, 8); 2464 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2465 other_encoding, 16); 2466 2467 /* 2468 * this returns the number of bytes used by the item on disk, minus the 2469 * size of any extent headers. If a file is compressed on disk, this is 2470 * the compressed size 2471 */ 2472 static inline u32 btrfs_file_extent_inline_item_len( 2473 const struct extent_buffer *eb, 2474 struct btrfs_item *e) 2475 { 2476 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2477 } 2478 2479 /* btrfs_dev_stats_item */ 2480 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2481 const struct btrfs_dev_stats_item *ptr, 2482 int index) 2483 { 2484 u64 val; 2485 2486 read_extent_buffer(eb, &val, 2487 offsetof(struct btrfs_dev_stats_item, values) + 2488 ((unsigned long)ptr) + (index * sizeof(u64)), 2489 sizeof(val)); 2490 return val; 2491 } 2492 2493 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2494 struct btrfs_dev_stats_item *ptr, 2495 int index, u64 val) 2496 { 2497 write_extent_buffer(eb, &val, 2498 offsetof(struct btrfs_dev_stats_item, values) + 2499 ((unsigned long)ptr) + (index * sizeof(u64)), 2500 sizeof(val)); 2501 } 2502 2503 /* btrfs_qgroup_status_item */ 2504 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2505 generation, 64); 2506 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2507 version, 64); 2508 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2509 flags, 64); 2510 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2511 rescan, 64); 2512 2513 /* btrfs_qgroup_info_item */ 2514 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2515 generation, 64); 2516 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2517 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2518 rfer_cmpr, 64); 2519 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2520 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2521 excl_cmpr, 64); 2522 2523 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2524 struct btrfs_qgroup_info_item, generation, 64); 2525 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2526 rfer, 64); 2527 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2528 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2529 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2530 excl, 64); 2531 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2532 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2533 2534 /* btrfs_qgroup_limit_item */ 2535 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2536 flags, 64); 2537 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2538 max_rfer, 64); 2539 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2540 max_excl, 64); 2541 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2542 rsv_rfer, 64); 2543 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2544 rsv_excl, 64); 2545 2546 /* btrfs_dev_replace_item */ 2547 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2548 struct btrfs_dev_replace_item, src_devid, 64); 2549 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2550 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2551 64); 2552 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2553 replace_state, 64); 2554 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2555 time_started, 64); 2556 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2557 time_stopped, 64); 2558 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2559 num_write_errors, 64); 2560 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2561 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2562 64); 2563 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2564 cursor_left, 64); 2565 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2566 cursor_right, 64); 2567 2568 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2569 struct btrfs_dev_replace_item, src_devid, 64); 2570 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2571 struct btrfs_dev_replace_item, 2572 cont_reading_from_srcdev_mode, 64); 2573 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2574 struct btrfs_dev_replace_item, replace_state, 64); 2575 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2576 struct btrfs_dev_replace_item, time_started, 64); 2577 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2578 struct btrfs_dev_replace_item, time_stopped, 64); 2579 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2580 struct btrfs_dev_replace_item, num_write_errors, 64); 2581 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2582 struct btrfs_dev_replace_item, 2583 num_uncorrectable_read_errors, 64); 2584 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2585 struct btrfs_dev_replace_item, cursor_left, 64); 2586 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2587 struct btrfs_dev_replace_item, cursor_right, 64); 2588 2589 /* helper function to cast into the data area of the leaf. */ 2590 #define btrfs_item_ptr(leaf, slot, type) \ 2591 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2592 btrfs_item_offset_nr(leaf, slot))) 2593 2594 #define btrfs_item_ptr_offset(leaf, slot) \ 2595 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2596 btrfs_item_offset_nr(leaf, slot))) 2597 2598 static inline u64 btrfs_name_hash(const char *name, int len) 2599 { 2600 return crc32c((u32)~1, name, len); 2601 } 2602 2603 /* 2604 * Figure the key offset of an extended inode ref 2605 */ 2606 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2607 int len) 2608 { 2609 return (u64) crc32c(parent_objectid, name, len); 2610 } 2611 2612 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2613 { 2614 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2615 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2616 } 2617 2618 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2619 { 2620 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2621 } 2622 2623 /* extent-tree.c */ 2624 2625 enum btrfs_inline_ref_type { 2626 BTRFS_REF_TYPE_INVALID, 2627 BTRFS_REF_TYPE_BLOCK, 2628 BTRFS_REF_TYPE_DATA, 2629 BTRFS_REF_TYPE_ANY, 2630 }; 2631 2632 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2633 struct btrfs_extent_inline_ref *iref, 2634 enum btrfs_inline_ref_type is_data); 2635 2636 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2637 2638 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2639 unsigned num_items) 2640 { 2641 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2642 } 2643 2644 /* 2645 * Doing a truncate won't result in new nodes or leaves, just what we need for 2646 * COW. 2647 */ 2648 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2649 unsigned num_items) 2650 { 2651 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2652 } 2653 2654 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans); 2655 bool btrfs_check_space_for_delayed_refs(struct btrfs_fs_info *fs_info); 2656 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2657 const u64 start); 2658 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2659 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2660 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2661 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2662 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2663 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2664 unsigned long count); 2665 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2666 unsigned long count, u64 transid, int wait); 2667 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2668 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2669 struct btrfs_fs_info *fs_info, u64 bytenr, 2670 u64 offset, int metadata, u64 *refs, u64 *flags); 2671 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2672 u64 bytenr, u64 num, int reserved); 2673 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2674 u64 bytenr, u64 num_bytes); 2675 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2676 struct extent_buffer *eb); 2677 int btrfs_cross_ref_exist(struct btrfs_root *root, 2678 u64 objectid, u64 offset, u64 bytenr); 2679 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2680 struct btrfs_fs_info *info, 2681 u64 bytenr); 2682 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2683 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2684 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2685 struct btrfs_root *root, 2686 u64 parent, u64 root_objectid, 2687 const struct btrfs_disk_key *key, 2688 int level, u64 hint, 2689 u64 empty_size); 2690 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2691 struct btrfs_root *root, 2692 struct extent_buffer *buf, 2693 u64 parent, int last_ref); 2694 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2695 struct btrfs_root *root, u64 owner, 2696 u64 offset, u64 ram_bytes, 2697 struct btrfs_key *ins); 2698 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2699 u64 root_objectid, u64 owner, u64 offset, 2700 struct btrfs_key *ins); 2701 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2702 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2703 struct btrfs_key *ins, int is_data, int delalloc); 2704 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2705 struct extent_buffer *buf, int full_backref); 2706 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2707 struct extent_buffer *buf, int full_backref); 2708 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2709 struct btrfs_fs_info *fs_info, 2710 u64 bytenr, u64 num_bytes, u64 flags, 2711 int level, int is_data); 2712 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2713 struct btrfs_root *root, 2714 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2715 u64 owner, u64 offset); 2716 2717 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2718 u64 start, u64 len, int delalloc); 2719 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2720 u64 start, u64 len); 2721 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2722 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2723 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2724 struct btrfs_root *root, 2725 u64 bytenr, u64 num_bytes, u64 parent, 2726 u64 root_objectid, u64 owner, u64 offset); 2727 2728 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2729 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2730 struct btrfs_fs_info *fs_info); 2731 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2732 struct btrfs_fs_info *fs_info); 2733 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2734 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2735 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2736 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2737 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2738 u64 bytes_used, u64 type, u64 chunk_offset, 2739 u64 size); 2740 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2741 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2742 struct btrfs_fs_info *fs_info, 2743 const u64 chunk_offset); 2744 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2745 u64 group_start, struct extent_map *em); 2746 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2747 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2748 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2749 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2750 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2751 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2752 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2753 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2754 2755 enum btrfs_reserve_flush_enum { 2756 /* If we are in the transaction, we can't flush anything.*/ 2757 BTRFS_RESERVE_NO_FLUSH, 2758 /* 2759 * Flushing delalloc may cause deadlock somewhere, in this 2760 * case, use FLUSH LIMIT 2761 */ 2762 BTRFS_RESERVE_FLUSH_LIMIT, 2763 BTRFS_RESERVE_FLUSH_ALL, 2764 }; 2765 2766 enum btrfs_flush_state { 2767 FLUSH_DELAYED_ITEMS_NR = 1, 2768 FLUSH_DELAYED_ITEMS = 2, 2769 FLUSH_DELAYED_REFS_NR = 3, 2770 FLUSH_DELAYED_REFS = 4, 2771 FLUSH_DELALLOC = 5, 2772 FLUSH_DELALLOC_WAIT = 6, 2773 ALLOC_CHUNK = 7, 2774 COMMIT_TRANS = 8, 2775 }; 2776 2777 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2778 int btrfs_check_data_free_space(struct inode *inode, 2779 struct extent_changeset **reserved, u64 start, u64 len); 2780 void btrfs_free_reserved_data_space(struct inode *inode, 2781 struct extent_changeset *reserved, u64 start, u64 len); 2782 void btrfs_delalloc_release_space(struct inode *inode, 2783 struct extent_changeset *reserved, 2784 u64 start, u64 len, bool qgroup_free); 2785 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2786 u64 len); 2787 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2788 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2789 struct btrfs_block_rsv *rsv, 2790 int nitems, bool use_global_rsv); 2791 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2792 struct btrfs_block_rsv *rsv); 2793 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2794 bool qgroup_free); 2795 2796 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2797 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2798 bool qgroup_free); 2799 int btrfs_delalloc_reserve_space(struct inode *inode, 2800 struct extent_changeset **reserved, u64 start, u64 len); 2801 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2802 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2803 unsigned short type); 2804 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2805 struct btrfs_block_rsv *rsv, 2806 unsigned short type); 2807 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2808 struct btrfs_block_rsv *rsv); 2809 int btrfs_block_rsv_add(struct btrfs_root *root, 2810 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2811 enum btrfs_reserve_flush_enum flush); 2812 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2813 int btrfs_block_rsv_refill(struct btrfs_root *root, 2814 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2815 enum btrfs_reserve_flush_enum flush); 2816 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2817 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2818 bool update_size); 2819 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2820 struct btrfs_block_rsv *dest, u64 num_bytes, 2821 int min_factor); 2822 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2823 struct btrfs_block_rsv *block_rsv, 2824 u64 num_bytes); 2825 void btrfs_delayed_refs_rsv_release(struct btrfs_fs_info *fs_info, int nr); 2826 void btrfs_update_delayed_refs_rsv(struct btrfs_trans_handle *trans); 2827 int btrfs_delayed_refs_rsv_refill(struct btrfs_fs_info *fs_info, 2828 enum btrfs_reserve_flush_enum flush); 2829 void btrfs_migrate_to_delayed_refs_rsv(struct btrfs_fs_info *fs_info, 2830 struct btrfs_block_rsv *src, 2831 u64 num_bytes); 2832 int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache); 2833 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2834 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2835 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2836 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2837 u64 start, u64 end); 2838 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2839 u64 num_bytes, u64 *actual_bytes); 2840 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type); 2841 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2842 2843 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2844 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2845 struct btrfs_fs_info *fs_info); 2846 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2847 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2848 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2849 void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type); 2850 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2851 u64 start, u64 end); 2852 void btrfs_mark_bg_unused(struct btrfs_block_group_cache *bg); 2853 2854 /* ctree.c */ 2855 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2856 int level, int *slot); 2857 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2858 int btrfs_previous_item(struct btrfs_root *root, 2859 struct btrfs_path *path, u64 min_objectid, 2860 int type); 2861 int btrfs_previous_extent_item(struct btrfs_root *root, 2862 struct btrfs_path *path, u64 min_objectid); 2863 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2864 struct btrfs_path *path, 2865 const struct btrfs_key *new_key); 2866 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2867 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2868 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2869 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2870 struct btrfs_key *key, int lowest_level, 2871 u64 min_trans); 2872 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2873 struct btrfs_path *path, 2874 u64 min_trans); 2875 enum btrfs_compare_tree_result { 2876 BTRFS_COMPARE_TREE_NEW, 2877 BTRFS_COMPARE_TREE_DELETED, 2878 BTRFS_COMPARE_TREE_CHANGED, 2879 BTRFS_COMPARE_TREE_SAME, 2880 }; 2881 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2882 struct btrfs_path *right_path, 2883 struct btrfs_key *key, 2884 enum btrfs_compare_tree_result result, 2885 void *ctx); 2886 int btrfs_compare_trees(struct btrfs_root *left_root, 2887 struct btrfs_root *right_root, 2888 btrfs_changed_cb_t cb, void *ctx); 2889 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2890 struct btrfs_root *root, struct extent_buffer *buf, 2891 struct extent_buffer *parent, int parent_slot, 2892 struct extent_buffer **cow_ret); 2893 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2894 struct btrfs_root *root, 2895 struct extent_buffer *buf, 2896 struct extent_buffer **cow_ret, u64 new_root_objectid); 2897 int btrfs_block_can_be_shared(struct btrfs_root *root, 2898 struct extent_buffer *buf); 2899 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2900 u32 data_size); 2901 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2902 struct btrfs_path *path, u32 new_size, int from_end); 2903 int btrfs_split_item(struct btrfs_trans_handle *trans, 2904 struct btrfs_root *root, 2905 struct btrfs_path *path, 2906 const struct btrfs_key *new_key, 2907 unsigned long split_offset); 2908 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2909 struct btrfs_root *root, 2910 struct btrfs_path *path, 2911 const struct btrfs_key *new_key); 2912 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2913 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2914 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2915 const struct btrfs_key *key, struct btrfs_path *p, 2916 int ins_len, int cow); 2917 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2918 struct btrfs_path *p, u64 time_seq); 2919 int btrfs_search_slot_for_read(struct btrfs_root *root, 2920 const struct btrfs_key *key, 2921 struct btrfs_path *p, int find_higher, 2922 int return_any); 2923 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2924 struct btrfs_root *root, struct extent_buffer *parent, 2925 int start_slot, u64 *last_ret, 2926 struct btrfs_key *progress); 2927 void btrfs_release_path(struct btrfs_path *p); 2928 struct btrfs_path *btrfs_alloc_path(void); 2929 void btrfs_free_path(struct btrfs_path *p); 2930 void btrfs_set_path_blocking(struct btrfs_path *p); 2931 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2932 2933 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2934 struct btrfs_path *path, int slot, int nr); 2935 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2936 struct btrfs_root *root, 2937 struct btrfs_path *path) 2938 { 2939 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2940 } 2941 2942 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2943 const struct btrfs_key *cpu_key, u32 *data_size, 2944 u32 total_data, u32 total_size, int nr); 2945 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2946 const struct btrfs_key *key, void *data, u32 data_size); 2947 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2948 struct btrfs_root *root, 2949 struct btrfs_path *path, 2950 const struct btrfs_key *cpu_key, u32 *data_size, 2951 int nr); 2952 2953 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2954 struct btrfs_root *root, 2955 struct btrfs_path *path, 2956 const struct btrfs_key *key, 2957 u32 data_size) 2958 { 2959 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2960 } 2961 2962 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2963 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2964 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2965 u64 time_seq); 2966 static inline int btrfs_next_old_item(struct btrfs_root *root, 2967 struct btrfs_path *p, u64 time_seq) 2968 { 2969 ++p->slots[0]; 2970 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2971 return btrfs_next_old_leaf(root, p, time_seq); 2972 return 0; 2973 } 2974 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2975 { 2976 return btrfs_next_old_item(root, p, 0); 2977 } 2978 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2979 struct extent_buffer *leaf); 2980 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2981 struct btrfs_block_rsv *block_rsv, 2982 int update_ref, int for_reloc); 2983 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2984 struct btrfs_root *root, 2985 struct extent_buffer *node, 2986 struct extent_buffer *parent); 2987 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2988 { 2989 /* 2990 * Do it this way so we only ever do one test_bit in the normal case. 2991 */ 2992 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2993 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2994 return 2; 2995 return 1; 2996 } 2997 return 0; 2998 } 2999 3000 /* 3001 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 3002 * anything except sleeping. This function is used to check the status of 3003 * the fs. 3004 */ 3005 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 3006 { 3007 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 3008 } 3009 3010 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 3011 { 3012 kfree(fs_info->balance_ctl); 3013 kfree(fs_info->delayed_root); 3014 kfree(fs_info->extent_root); 3015 kfree(fs_info->tree_root); 3016 kfree(fs_info->chunk_root); 3017 kfree(fs_info->dev_root); 3018 kfree(fs_info->csum_root); 3019 kfree(fs_info->quota_root); 3020 kfree(fs_info->uuid_root); 3021 kfree(fs_info->free_space_root); 3022 kfree(fs_info->super_copy); 3023 kfree(fs_info->super_for_commit); 3024 security_free_mnt_opts(&fs_info->security_opts); 3025 kvfree(fs_info); 3026 } 3027 3028 /* tree mod log functions from ctree.c */ 3029 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 3030 struct seq_list *elem); 3031 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 3032 struct seq_list *elem); 3033 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 3034 3035 /* root-item.c */ 3036 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 3037 u64 ref_id, u64 dirid, u64 sequence, const char *name, 3038 int name_len); 3039 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 3040 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 3041 int name_len); 3042 int btrfs_del_root(struct btrfs_trans_handle *trans, 3043 const struct btrfs_key *key); 3044 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 3045 const struct btrfs_key *key, 3046 struct btrfs_root_item *item); 3047 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3048 struct btrfs_root *root, 3049 struct btrfs_key *key, 3050 struct btrfs_root_item *item); 3051 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3052 struct btrfs_path *path, struct btrfs_root_item *root_item, 3053 struct btrfs_key *root_key); 3054 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3055 void btrfs_set_root_node(struct btrfs_root_item *item, 3056 struct extent_buffer *node); 3057 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3058 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3059 struct btrfs_root *root); 3060 3061 /* uuid-tree.c */ 3062 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3063 u64 subid); 3064 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 3065 u64 subid); 3066 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3067 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3068 u64)); 3069 3070 /* dir-item.c */ 3071 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3072 const char *name, int name_len); 3073 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 3074 int name_len, struct btrfs_inode *dir, 3075 struct btrfs_key *location, u8 type, u64 index); 3076 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3077 struct btrfs_root *root, 3078 struct btrfs_path *path, u64 dir, 3079 const char *name, int name_len, 3080 int mod); 3081 struct btrfs_dir_item * 3082 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3083 struct btrfs_root *root, 3084 struct btrfs_path *path, u64 dir, 3085 u64 objectid, const char *name, int name_len, 3086 int mod); 3087 struct btrfs_dir_item * 3088 btrfs_search_dir_index_item(struct btrfs_root *root, 3089 struct btrfs_path *path, u64 dirid, 3090 const char *name, int name_len); 3091 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3092 struct btrfs_root *root, 3093 struct btrfs_path *path, 3094 struct btrfs_dir_item *di); 3095 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3096 struct btrfs_root *root, 3097 struct btrfs_path *path, u64 objectid, 3098 const char *name, u16 name_len, 3099 const void *data, u16 data_len); 3100 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3101 struct btrfs_root *root, 3102 struct btrfs_path *path, u64 dir, 3103 const char *name, u16 name_len, 3104 int mod); 3105 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3106 struct btrfs_path *path, 3107 const char *name, 3108 int name_len); 3109 3110 /* orphan.c */ 3111 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3112 struct btrfs_root *root, u64 offset); 3113 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3114 struct btrfs_root *root, u64 offset); 3115 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3116 3117 /* inode-item.c */ 3118 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3119 struct btrfs_root *root, 3120 const char *name, int name_len, 3121 u64 inode_objectid, u64 ref_objectid, u64 index); 3122 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3123 struct btrfs_root *root, 3124 const char *name, int name_len, 3125 u64 inode_objectid, u64 ref_objectid, u64 *index); 3126 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3127 struct btrfs_root *root, 3128 struct btrfs_path *path, u64 objectid); 3129 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3130 *root, struct btrfs_path *path, 3131 struct btrfs_key *location, int mod); 3132 3133 struct btrfs_inode_extref * 3134 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3135 struct btrfs_root *root, 3136 struct btrfs_path *path, 3137 const char *name, int name_len, 3138 u64 inode_objectid, u64 ref_objectid, int ins_len, 3139 int cow); 3140 3141 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3142 const char *name, 3143 int name_len, struct btrfs_inode_ref **ref_ret); 3144 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3145 u64 ref_objectid, const char *name, 3146 int name_len, 3147 struct btrfs_inode_extref **extref_ret); 3148 3149 /* file-item.c */ 3150 struct btrfs_dio_private; 3151 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3152 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3153 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3154 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3155 u64 logical_offset); 3156 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3157 struct btrfs_root *root, 3158 u64 objectid, u64 pos, 3159 u64 disk_offset, u64 disk_num_bytes, 3160 u64 num_bytes, u64 offset, u64 ram_bytes, 3161 u8 compression, u8 encryption, u16 other_encoding); 3162 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3163 struct btrfs_root *root, 3164 struct btrfs_path *path, u64 objectid, 3165 u64 bytenr, int mod); 3166 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3167 struct btrfs_root *root, 3168 struct btrfs_ordered_sum *sums); 3169 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3170 u64 file_start, int contig); 3171 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3172 struct list_head *list, int search_commit); 3173 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3174 const struct btrfs_path *path, 3175 struct btrfs_file_extent_item *fi, 3176 const bool new_inline, 3177 struct extent_map *em); 3178 3179 /* inode.c */ 3180 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3181 struct page *page, size_t pg_offset, u64 start, 3182 u64 len, int create); 3183 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3184 u64 *orig_start, u64 *orig_block_len, 3185 u64 *ram_bytes); 3186 3187 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3188 struct btrfs_inode *inode); 3189 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3190 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3191 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3192 struct btrfs_root *root, 3193 struct btrfs_inode *dir, struct btrfs_inode *inode, 3194 const char *name, int name_len); 3195 int btrfs_add_link(struct btrfs_trans_handle *trans, 3196 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3197 const char *name, int name_len, int add_backref, u64 index); 3198 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3199 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3200 int front); 3201 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3202 struct btrfs_root *root, 3203 struct inode *inode, u64 new_size, 3204 u32 min_type); 3205 3206 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3207 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 3208 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3209 unsigned int extra_bits, 3210 struct extent_state **cached_state, int dedupe); 3211 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3212 struct btrfs_root *new_root, 3213 struct btrfs_root *parent_root, 3214 u64 new_dirid); 3215 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3216 unsigned *bits); 3217 void btrfs_clear_delalloc_extent(struct inode *inode, 3218 struct extent_state *state, unsigned *bits); 3219 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3220 struct extent_state *other); 3221 void btrfs_split_delalloc_extent(struct inode *inode, 3222 struct extent_state *orig, u64 split); 3223 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3224 unsigned long bio_flags); 3225 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3226 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3227 int btrfs_readpage(struct file *file, struct page *page); 3228 void btrfs_evict_inode(struct inode *inode); 3229 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3230 struct inode *btrfs_alloc_inode(struct super_block *sb); 3231 void btrfs_destroy_inode(struct inode *inode); 3232 int btrfs_drop_inode(struct inode *inode); 3233 int __init btrfs_init_cachep(void); 3234 void __cold btrfs_destroy_cachep(void); 3235 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 3236 struct btrfs_root *root, int *new, 3237 struct btrfs_path *path); 3238 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3239 struct btrfs_root *root, int *was_new); 3240 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3241 struct page *page, size_t pg_offset, 3242 u64 start, u64 end, int create); 3243 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3244 struct btrfs_root *root, 3245 struct inode *inode); 3246 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3247 struct btrfs_root *root, struct inode *inode); 3248 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3249 struct btrfs_inode *inode); 3250 int btrfs_orphan_cleanup(struct btrfs_root *root); 3251 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3252 void btrfs_add_delayed_iput(struct inode *inode); 3253 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3254 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3255 u64 start, u64 num_bytes, u64 min_size, 3256 loff_t actual_len, u64 *alloc_hint); 3257 int btrfs_prealloc_file_range_trans(struct inode *inode, 3258 struct btrfs_trans_handle *trans, int mode, 3259 u64 start, u64 num_bytes, u64 min_size, 3260 loff_t actual_len, u64 *alloc_hint); 3261 int btrfs_run_delalloc_range(void *private_data, struct page *locked_page, 3262 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3263 struct writeback_control *wbc); 3264 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3265 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3266 u64 end, int uptodate); 3267 extern const struct dentry_operations btrfs_dentry_operations; 3268 3269 /* ioctl.c */ 3270 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3271 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3272 int btrfs_ioctl_get_supported_features(void __user *arg); 3273 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3274 int btrfs_is_empty_uuid(u8 *uuid); 3275 int btrfs_defrag_file(struct inode *inode, struct file *file, 3276 struct btrfs_ioctl_defrag_range_args *range, 3277 u64 newer_than, unsigned long max_pages); 3278 void btrfs_get_block_group_info(struct list_head *groups_list, 3279 struct btrfs_ioctl_space_info *space); 3280 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3281 struct btrfs_ioctl_balance_args *bargs); 3282 3283 /* file.c */ 3284 int __init btrfs_auto_defrag_init(void); 3285 void __cold btrfs_auto_defrag_exit(void); 3286 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3287 struct btrfs_inode *inode); 3288 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3289 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3290 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3291 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3292 int skip_pinned); 3293 extern const struct file_operations btrfs_file_operations; 3294 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3295 struct btrfs_root *root, struct inode *inode, 3296 struct btrfs_path *path, u64 start, u64 end, 3297 u64 *drop_end, int drop_cache, 3298 int replace_extent, 3299 u32 extent_item_size, 3300 int *key_inserted); 3301 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3302 struct btrfs_root *root, struct inode *inode, u64 start, 3303 u64 end, int drop_cache); 3304 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3305 struct btrfs_inode *inode, u64 start, u64 end); 3306 int btrfs_release_file(struct inode *inode, struct file *file); 3307 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3308 size_t num_pages, loff_t pos, size_t write_bytes, 3309 struct extent_state **cached); 3310 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3311 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 3312 struct file *file_out, loff_t pos_out, 3313 loff_t len, unsigned int remap_flags); 3314 3315 /* tree-defrag.c */ 3316 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3317 struct btrfs_root *root); 3318 3319 /* sysfs.c */ 3320 int __init btrfs_init_sysfs(void); 3321 void __cold btrfs_exit_sysfs(void); 3322 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3323 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3324 3325 /* super.c */ 3326 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3327 unsigned long new_flags); 3328 int btrfs_sync_fs(struct super_block *sb, int wait); 3329 3330 static inline __printf(2, 3) __cold 3331 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3332 { 3333 } 3334 3335 #ifdef CONFIG_PRINTK 3336 __printf(2, 3) 3337 __cold 3338 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3339 #else 3340 #define btrfs_printk(fs_info, fmt, args...) \ 3341 btrfs_no_printk(fs_info, fmt, ##args) 3342 #endif 3343 3344 #define btrfs_emerg(fs_info, fmt, args...) \ 3345 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3346 #define btrfs_alert(fs_info, fmt, args...) \ 3347 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3348 #define btrfs_crit(fs_info, fmt, args...) \ 3349 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3350 #define btrfs_err(fs_info, fmt, args...) \ 3351 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3352 #define btrfs_warn(fs_info, fmt, args...) \ 3353 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3354 #define btrfs_notice(fs_info, fmt, args...) \ 3355 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3356 #define btrfs_info(fs_info, fmt, args...) \ 3357 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3358 3359 /* 3360 * Wrappers that use printk_in_rcu 3361 */ 3362 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3363 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3364 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3365 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3366 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3367 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3368 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3369 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3370 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3371 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3372 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3373 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3374 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3375 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3376 3377 /* 3378 * Wrappers that use a ratelimited printk_in_rcu 3379 */ 3380 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3381 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3382 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3383 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3384 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3385 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3386 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3387 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3388 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3389 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3390 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3391 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3392 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3393 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3394 3395 /* 3396 * Wrappers that use a ratelimited printk 3397 */ 3398 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3399 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3400 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3401 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3402 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3403 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3404 #define btrfs_err_rl(fs_info, fmt, args...) \ 3405 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3406 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3407 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3408 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3409 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3410 #define btrfs_info_rl(fs_info, fmt, args...) \ 3411 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3412 3413 #if defined(CONFIG_DYNAMIC_DEBUG) 3414 #define btrfs_debug(fs_info, fmt, args...) \ 3415 do { \ 3416 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3417 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3418 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3419 } while (0) 3420 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3421 do { \ 3422 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3423 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3424 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3425 } while (0) 3426 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3427 do { \ 3428 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3429 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3430 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3431 ##args);\ 3432 } while (0) 3433 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3434 do { \ 3435 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3436 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3437 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3438 ##args); \ 3439 } while (0) 3440 #elif defined(DEBUG) 3441 #define btrfs_debug(fs_info, fmt, args...) \ 3442 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3443 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3444 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3445 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3446 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3447 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3448 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3449 #else 3450 #define btrfs_debug(fs_info, fmt, args...) \ 3451 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3452 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3453 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3454 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3455 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3456 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3457 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3458 #endif 3459 3460 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3461 do { \ 3462 rcu_read_lock(); \ 3463 btrfs_printk(fs_info, fmt, ##args); \ 3464 rcu_read_unlock(); \ 3465 } while (0) 3466 3467 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3468 do { \ 3469 rcu_read_lock(); \ 3470 btrfs_no_printk(fs_info, fmt, ##args); \ 3471 rcu_read_unlock(); \ 3472 } while (0) 3473 3474 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3475 do { \ 3476 static DEFINE_RATELIMIT_STATE(_rs, \ 3477 DEFAULT_RATELIMIT_INTERVAL, \ 3478 DEFAULT_RATELIMIT_BURST); \ 3479 if (__ratelimit(&_rs)) \ 3480 btrfs_printk(fs_info, fmt, ##args); \ 3481 } while (0) 3482 3483 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3484 do { \ 3485 rcu_read_lock(); \ 3486 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3487 rcu_read_unlock(); \ 3488 } while (0) 3489 3490 #ifdef CONFIG_BTRFS_ASSERT 3491 3492 __cold 3493 static inline void assfail(const char *expr, const char *file, int line) 3494 { 3495 pr_err("assertion failed: %s, file: %s, line: %d\n", 3496 expr, file, line); 3497 BUG(); 3498 } 3499 3500 #define ASSERT(expr) \ 3501 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3502 #else 3503 #define ASSERT(expr) ((void)0) 3504 #endif 3505 3506 /* 3507 * Use that for functions that are conditionally exported for sanity tests but 3508 * otherwise static 3509 */ 3510 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3511 #define EXPORT_FOR_TESTS static 3512 #else 3513 #define EXPORT_FOR_TESTS 3514 #endif 3515 3516 __cold 3517 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3518 { 3519 btrfs_err(fs_info, 3520 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3521 } 3522 3523 __printf(5, 6) 3524 __cold 3525 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3526 unsigned int line, int errno, const char *fmt, ...); 3527 3528 const char *btrfs_decode_error(int errno); 3529 3530 __cold 3531 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3532 const char *function, 3533 unsigned int line, int errno); 3534 3535 /* 3536 * Call btrfs_abort_transaction as early as possible when an error condition is 3537 * detected, that way the exact line number is reported. 3538 */ 3539 #define btrfs_abort_transaction(trans, errno) \ 3540 do { \ 3541 /* Report first abort since mount */ \ 3542 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3543 &((trans)->fs_info->fs_state))) { \ 3544 if ((errno) != -EIO) { \ 3545 WARN(1, KERN_DEBUG \ 3546 "BTRFS: Transaction aborted (error %d)\n", \ 3547 (errno)); \ 3548 } else { \ 3549 btrfs_debug((trans)->fs_info, \ 3550 "Transaction aborted (error %d)", \ 3551 (errno)); \ 3552 } \ 3553 } \ 3554 __btrfs_abort_transaction((trans), __func__, \ 3555 __LINE__, (errno)); \ 3556 } while (0) 3557 3558 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3559 do { \ 3560 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3561 (errno), fmt, ##args); \ 3562 } while (0) 3563 3564 __printf(5, 6) 3565 __cold 3566 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3567 unsigned int line, int errno, const char *fmt, ...); 3568 /* 3569 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3570 * will panic(). Otherwise we BUG() here. 3571 */ 3572 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3573 do { \ 3574 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3575 BUG(); \ 3576 } while (0) 3577 3578 3579 /* compatibility and incompatibility defines */ 3580 3581 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3582 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3583 3584 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3585 u64 flag) 3586 { 3587 struct btrfs_super_block *disk_super; 3588 u64 features; 3589 3590 disk_super = fs_info->super_copy; 3591 features = btrfs_super_incompat_flags(disk_super); 3592 if (!(features & flag)) { 3593 spin_lock(&fs_info->super_lock); 3594 features = btrfs_super_incompat_flags(disk_super); 3595 if (!(features & flag)) { 3596 features |= flag; 3597 btrfs_set_super_incompat_flags(disk_super, features); 3598 btrfs_info(fs_info, "setting %llu feature flag", 3599 flag); 3600 } 3601 spin_unlock(&fs_info->super_lock); 3602 } 3603 } 3604 3605 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3606 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3607 3608 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3609 u64 flag) 3610 { 3611 struct btrfs_super_block *disk_super; 3612 u64 features; 3613 3614 disk_super = fs_info->super_copy; 3615 features = btrfs_super_incompat_flags(disk_super); 3616 if (features & flag) { 3617 spin_lock(&fs_info->super_lock); 3618 features = btrfs_super_incompat_flags(disk_super); 3619 if (features & flag) { 3620 features &= ~flag; 3621 btrfs_set_super_incompat_flags(disk_super, features); 3622 btrfs_info(fs_info, "clearing %llu feature flag", 3623 flag); 3624 } 3625 spin_unlock(&fs_info->super_lock); 3626 } 3627 } 3628 3629 #define btrfs_fs_incompat(fs_info, opt) \ 3630 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3631 3632 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3633 { 3634 struct btrfs_super_block *disk_super; 3635 disk_super = fs_info->super_copy; 3636 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3637 } 3638 3639 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3640 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3641 3642 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3643 u64 flag) 3644 { 3645 struct btrfs_super_block *disk_super; 3646 u64 features; 3647 3648 disk_super = fs_info->super_copy; 3649 features = btrfs_super_compat_ro_flags(disk_super); 3650 if (!(features & flag)) { 3651 spin_lock(&fs_info->super_lock); 3652 features = btrfs_super_compat_ro_flags(disk_super); 3653 if (!(features & flag)) { 3654 features |= flag; 3655 btrfs_set_super_compat_ro_flags(disk_super, features); 3656 btrfs_info(fs_info, "setting %llu ro feature flag", 3657 flag); 3658 } 3659 spin_unlock(&fs_info->super_lock); 3660 } 3661 } 3662 3663 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3664 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3665 3666 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3667 u64 flag) 3668 { 3669 struct btrfs_super_block *disk_super; 3670 u64 features; 3671 3672 disk_super = fs_info->super_copy; 3673 features = btrfs_super_compat_ro_flags(disk_super); 3674 if (features & flag) { 3675 spin_lock(&fs_info->super_lock); 3676 features = btrfs_super_compat_ro_flags(disk_super); 3677 if (features & flag) { 3678 features &= ~flag; 3679 btrfs_set_super_compat_ro_flags(disk_super, features); 3680 btrfs_info(fs_info, "clearing %llu ro feature flag", 3681 flag); 3682 } 3683 spin_unlock(&fs_info->super_lock); 3684 } 3685 } 3686 3687 #define btrfs_fs_compat_ro(fs_info, opt) \ 3688 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3689 3690 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3691 { 3692 struct btrfs_super_block *disk_super; 3693 disk_super = fs_info->super_copy; 3694 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3695 } 3696 3697 /* acl.c */ 3698 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3699 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3700 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3701 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3702 struct inode *inode, struct inode *dir); 3703 #else 3704 #define btrfs_get_acl NULL 3705 #define btrfs_set_acl NULL 3706 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3707 struct inode *inode, struct inode *dir) 3708 { 3709 return 0; 3710 } 3711 #endif 3712 3713 /* relocation.c */ 3714 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3715 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3716 struct btrfs_root *root); 3717 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3718 struct btrfs_root *root); 3719 int btrfs_recover_relocation(struct btrfs_root *root); 3720 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3721 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3722 struct btrfs_root *root, struct extent_buffer *buf, 3723 struct extent_buffer *cow); 3724 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3725 u64 *bytes_to_reserve); 3726 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3727 struct btrfs_pending_snapshot *pending); 3728 3729 /* scrub.c */ 3730 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3731 u64 end, struct btrfs_scrub_progress *progress, 3732 int readonly, int is_dev_replace); 3733 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3734 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3735 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3736 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3737 struct btrfs_device *dev); 3738 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3739 struct btrfs_scrub_progress *progress); 3740 static inline void btrfs_init_full_stripe_locks_tree( 3741 struct btrfs_full_stripe_locks_tree *locks_root) 3742 { 3743 locks_root->root = RB_ROOT; 3744 mutex_init(&locks_root->lock); 3745 } 3746 3747 /* dev-replace.c */ 3748 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3749 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3750 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3751 3752 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3753 { 3754 btrfs_bio_counter_sub(fs_info, 1); 3755 } 3756 3757 /* reada.c */ 3758 struct reada_control { 3759 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3760 struct btrfs_key key_start; 3761 struct btrfs_key key_end; /* exclusive */ 3762 atomic_t elems; 3763 struct kref refcnt; 3764 wait_queue_head_t wait; 3765 }; 3766 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3767 struct btrfs_key *start, struct btrfs_key *end); 3768 int btrfs_reada_wait(void *handle); 3769 void btrfs_reada_detach(void *handle); 3770 int btree_readahead_hook(struct extent_buffer *eb, int err); 3771 3772 static inline int is_fstree(u64 rootid) 3773 { 3774 if (rootid == BTRFS_FS_TREE_OBJECTID || 3775 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3776 !btrfs_qgroup_level(rootid))) 3777 return 1; 3778 return 0; 3779 } 3780 3781 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3782 { 3783 return signal_pending(current); 3784 } 3785 3786 /* Sanity test specific functions */ 3787 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3788 void btrfs_test_inode_set_ops(struct inode *inode); 3789 void btrfs_test_destroy_inode(struct inode *inode); 3790 3791 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3792 { 3793 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3794 } 3795 #else 3796 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3797 { 3798 return 0; 3799 } 3800 #endif 3801 3802 static inline void cond_wake_up(struct wait_queue_head *wq) 3803 { 3804 /* 3805 * This implies a full smp_mb barrier, see comments for 3806 * waitqueue_active why. 3807 */ 3808 if (wq_has_sleeper(wq)) 3809 wake_up(wq); 3810 } 3811 3812 static inline void cond_wake_up_nomb(struct wait_queue_head *wq) 3813 { 3814 /* 3815 * Special case for conditional wakeup where the barrier required for 3816 * waitqueue_active is implied by some of the preceding code. Eg. one 3817 * of such atomic operations (atomic_dec_and_return, ...), or a 3818 * unlock/lock sequence, etc. 3819 */ 3820 if (waitqueue_active(wq)) 3821 wake_up(wq); 3822 } 3823 3824 #endif 3825