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 <trace/events/btrfs.h> 20 #include <asm/unaligned.h> 21 #include <linux/pagemap.h> 22 #include <linux/btrfs.h> 23 #include <linux/btrfs_tree.h> 24 #include <linux/workqueue.h> 25 #include <linux/security.h> 26 #include <linux/sizes.h> 27 #include <linux/dynamic_debug.h> 28 #include <linux/refcount.h> 29 #include <linux/crc32c.h> 30 #include <linux/iomap.h> 31 #include "extent-io-tree.h" 32 #include "extent_io.h" 33 #include "extent_map.h" 34 #include "async-thread.h" 35 #include "block-rsv.h" 36 #include "locking.h" 37 38 struct btrfs_trans_handle; 39 struct btrfs_transaction; 40 struct btrfs_pending_snapshot; 41 struct btrfs_delayed_ref_root; 42 struct btrfs_space_info; 43 struct btrfs_block_group; 44 extern struct kmem_cache *btrfs_trans_handle_cachep; 45 extern struct kmem_cache *btrfs_bit_radix_cachep; 46 extern struct kmem_cache *btrfs_path_cachep; 47 extern struct kmem_cache *btrfs_free_space_cachep; 48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 49 struct btrfs_ordered_sum; 50 struct btrfs_ref; 51 52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 53 54 /* 55 * Maximum number of mirrors that can be available for all profiles counting 56 * the target device of dev-replace as one. During an active device replace 57 * procedure, the target device of the copy operation is a mirror for the 58 * filesystem data as well that can be used to read data in order to repair 59 * read errors on other disks. 60 * 61 * Current value is derived from RAID1C4 with 4 copies. 62 */ 63 #define BTRFS_MAX_MIRRORS (4 + 1) 64 65 #define BTRFS_MAX_LEVEL 8 66 67 #define BTRFS_OLDEST_GENERATION 0ULL 68 69 /* 70 * we can actually store much bigger names, but lets not confuse the rest 71 * of linux 72 */ 73 #define BTRFS_NAME_LEN 255 74 75 /* 76 * Theoretical limit is larger, but we keep this down to a sane 77 * value. That should limit greatly the possibility of collisions on 78 * inode ref items. 79 */ 80 #define BTRFS_LINK_MAX 65535U 81 82 #define BTRFS_EMPTY_DIR_SIZE 0 83 84 /* ioprio of readahead is set to idle */ 85 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 86 87 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 88 89 /* 90 * Use large batch size to reduce overhead of metadata updates. On the reader 91 * side, we only read it when we are close to ENOSPC and the read overhead is 92 * mostly related to the number of CPUs, so it is OK to use arbitrary large 93 * value here. 94 */ 95 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 96 97 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 98 99 /* 100 * Deltas are an effective way to populate global statistics. Give macro names 101 * to make it clear what we're doing. An example is discard_extents in 102 * btrfs_free_space_ctl. 103 */ 104 #define BTRFS_STAT_NR_ENTRIES 2 105 #define BTRFS_STAT_CURR 0 106 #define BTRFS_STAT_PREV 1 107 108 /* 109 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 110 */ 111 static inline u32 count_max_extents(u64 size) 112 { 113 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 114 } 115 116 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 117 { 118 BUG_ON(num_stripes == 0); 119 return sizeof(struct btrfs_chunk) + 120 sizeof(struct btrfs_stripe) * (num_stripes - 1); 121 } 122 123 /* 124 * Runtime (in-memory) states of filesystem 125 */ 126 enum { 127 /* Global indicator of serious filesystem errors */ 128 BTRFS_FS_STATE_ERROR, 129 /* 130 * Filesystem is being remounted, allow to skip some operations, like 131 * defrag 132 */ 133 BTRFS_FS_STATE_REMOUNTING, 134 /* Filesystem in RO mode */ 135 BTRFS_FS_STATE_RO, 136 /* Track if a transaction abort has been reported on this filesystem */ 137 BTRFS_FS_STATE_TRANS_ABORTED, 138 /* 139 * Bio operations should be blocked on this filesystem because a source 140 * or target device is being destroyed as part of a device replace 141 */ 142 BTRFS_FS_STATE_DEV_REPLACING, 143 /* The btrfs_fs_info created for self-tests */ 144 BTRFS_FS_STATE_DUMMY_FS_INFO, 145 }; 146 147 #define BTRFS_BACKREF_REV_MAX 256 148 #define BTRFS_BACKREF_REV_SHIFT 56 149 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 150 BTRFS_BACKREF_REV_SHIFT) 151 152 #define BTRFS_OLD_BACKREF_REV 0 153 #define BTRFS_MIXED_BACKREF_REV 1 154 155 /* 156 * every tree block (leaf or node) starts with this header. 157 */ 158 struct btrfs_header { 159 /* these first four must match the super block */ 160 u8 csum[BTRFS_CSUM_SIZE]; 161 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 162 __le64 bytenr; /* which block this node is supposed to live in */ 163 __le64 flags; 164 165 /* allowed to be different from the super from here on down */ 166 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 167 __le64 generation; 168 __le64 owner; 169 __le32 nritems; 170 u8 level; 171 } __attribute__ ((__packed__)); 172 173 /* 174 * this is a very generous portion of the super block, giving us 175 * room to translate 14 chunks with 3 stripes each. 176 */ 177 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 178 179 /* 180 * just in case we somehow lose the roots and are not able to mount, 181 * we store an array of the roots from previous transactions 182 * in the super. 183 */ 184 #define BTRFS_NUM_BACKUP_ROOTS 4 185 struct btrfs_root_backup { 186 __le64 tree_root; 187 __le64 tree_root_gen; 188 189 __le64 chunk_root; 190 __le64 chunk_root_gen; 191 192 __le64 extent_root; 193 __le64 extent_root_gen; 194 195 __le64 fs_root; 196 __le64 fs_root_gen; 197 198 __le64 dev_root; 199 __le64 dev_root_gen; 200 201 __le64 csum_root; 202 __le64 csum_root_gen; 203 204 __le64 total_bytes; 205 __le64 bytes_used; 206 __le64 num_devices; 207 /* future */ 208 __le64 unused_64[4]; 209 210 u8 tree_root_level; 211 u8 chunk_root_level; 212 u8 extent_root_level; 213 u8 fs_root_level; 214 u8 dev_root_level; 215 u8 csum_root_level; 216 /* future and to align */ 217 u8 unused_8[10]; 218 } __attribute__ ((__packed__)); 219 220 /* 221 * the super block basically lists the main trees of the FS 222 * it currently lacks any block count etc etc 223 */ 224 struct btrfs_super_block { 225 /* the first 4 fields must match struct btrfs_header */ 226 u8 csum[BTRFS_CSUM_SIZE]; 227 /* FS specific UUID, visible to user */ 228 u8 fsid[BTRFS_FSID_SIZE]; 229 __le64 bytenr; /* this block number */ 230 __le64 flags; 231 232 /* allowed to be different from the btrfs_header from here own down */ 233 __le64 magic; 234 __le64 generation; 235 __le64 root; 236 __le64 chunk_root; 237 __le64 log_root; 238 239 /* this will help find the new super based on the log root */ 240 __le64 log_root_transid; 241 __le64 total_bytes; 242 __le64 bytes_used; 243 __le64 root_dir_objectid; 244 __le64 num_devices; 245 __le32 sectorsize; 246 __le32 nodesize; 247 __le32 __unused_leafsize; 248 __le32 stripesize; 249 __le32 sys_chunk_array_size; 250 __le64 chunk_root_generation; 251 __le64 compat_flags; 252 __le64 compat_ro_flags; 253 __le64 incompat_flags; 254 __le16 csum_type; 255 u8 root_level; 256 u8 chunk_root_level; 257 u8 log_root_level; 258 struct btrfs_dev_item dev_item; 259 260 char label[BTRFS_LABEL_SIZE]; 261 262 __le64 cache_generation; 263 __le64 uuid_tree_generation; 264 265 /* the UUID written into btree blocks */ 266 u8 metadata_uuid[BTRFS_FSID_SIZE]; 267 268 /* future expansion */ 269 __le64 reserved[28]; 270 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 271 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 272 } __attribute__ ((__packed__)); 273 274 /* 275 * Compat flags that we support. If any incompat flags are set other than the 276 * ones specified below then we will fail to mount 277 */ 278 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 279 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 280 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 281 282 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 283 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 284 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 285 286 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 287 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 288 289 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 290 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 291 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 292 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 293 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 294 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 295 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 296 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 297 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 298 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 299 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 300 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 301 BTRFS_FEATURE_INCOMPAT_RAID1C34 | \ 302 BTRFS_FEATURE_INCOMPAT_ZONED) 303 304 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 305 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 306 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 307 308 /* 309 * A leaf is full of items. offset and size tell us where to find 310 * the item in the leaf (relative to the start of the data area) 311 */ 312 struct btrfs_item { 313 struct btrfs_disk_key key; 314 __le32 offset; 315 __le32 size; 316 } __attribute__ ((__packed__)); 317 318 /* 319 * leaves have an item area and a data area: 320 * [item0, item1....itemN] [free space] [dataN...data1, data0] 321 * 322 * The data is separate from the items to get the keys closer together 323 * during searches. 324 */ 325 struct btrfs_leaf { 326 struct btrfs_header header; 327 struct btrfs_item items[]; 328 } __attribute__ ((__packed__)); 329 330 /* 331 * all non-leaf blocks are nodes, they hold only keys and pointers to 332 * other blocks 333 */ 334 struct btrfs_key_ptr { 335 struct btrfs_disk_key key; 336 __le64 blockptr; 337 __le64 generation; 338 } __attribute__ ((__packed__)); 339 340 struct btrfs_node { 341 struct btrfs_header header; 342 struct btrfs_key_ptr ptrs[]; 343 } __attribute__ ((__packed__)); 344 345 /* Read ahead values for struct btrfs_path.reada */ 346 enum { 347 READA_NONE, 348 READA_BACK, 349 READA_FORWARD, 350 /* 351 * Similar to READA_FORWARD but unlike it: 352 * 353 * 1) It will trigger readahead even for leaves that are not close to 354 * each other on disk; 355 * 2) It also triggers readahead for nodes; 356 * 3) During a search, even when a node or leaf is already in memory, it 357 * will still trigger readahead for other nodes and leaves that follow 358 * it. 359 * 360 * This is meant to be used only when we know we are iterating over the 361 * entire tree or a very large part of it. 362 */ 363 READA_FORWARD_ALWAYS, 364 }; 365 366 /* 367 * btrfs_paths remember the path taken from the root down to the leaf. 368 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 369 * to any other levels that are present. 370 * 371 * The slots array records the index of the item or block pointer 372 * used while walking the tree. 373 */ 374 struct btrfs_path { 375 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 376 int slots[BTRFS_MAX_LEVEL]; 377 /* if there is real range locking, this locks field will change */ 378 u8 locks[BTRFS_MAX_LEVEL]; 379 u8 reada; 380 /* keep some upper locks as we walk down */ 381 u8 lowest_level; 382 383 /* 384 * set by btrfs_split_item, tells search_slot to keep all locks 385 * and to force calls to keep space in the nodes 386 */ 387 unsigned int search_for_split:1; 388 unsigned int keep_locks:1; 389 unsigned int skip_locking:1; 390 unsigned int search_commit_root:1; 391 unsigned int need_commit_sem:1; 392 unsigned int skip_release_on_error:1; 393 /* 394 * Indicate that new item (btrfs_search_slot) is extending already 395 * existing item and ins_len contains only the data size and not item 396 * header (ie. sizeof(struct btrfs_item) is not included). 397 */ 398 unsigned int search_for_extension:1; 399 }; 400 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 401 sizeof(struct btrfs_item)) 402 struct btrfs_dev_replace { 403 u64 replace_state; /* see #define above */ 404 time64_t time_started; /* seconds since 1-Jan-1970 */ 405 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 406 atomic64_t num_write_errors; 407 atomic64_t num_uncorrectable_read_errors; 408 409 u64 cursor_left; 410 u64 committed_cursor_left; 411 u64 cursor_left_last_write_of_item; 412 u64 cursor_right; 413 414 u64 cont_reading_from_srcdev_mode; /* see #define above */ 415 416 int is_valid; 417 int item_needs_writeback; 418 struct btrfs_device *srcdev; 419 struct btrfs_device *tgtdev; 420 421 struct mutex lock_finishing_cancel_unmount; 422 struct rw_semaphore rwsem; 423 424 struct btrfs_scrub_progress scrub_progress; 425 426 struct percpu_counter bio_counter; 427 wait_queue_head_t replace_wait; 428 }; 429 430 /* 431 * free clusters are used to claim free space in relatively large chunks, 432 * allowing us to do less seeky writes. They are used for all metadata 433 * allocations. In ssd_spread mode they are also used for data allocations. 434 */ 435 struct btrfs_free_cluster { 436 spinlock_t lock; 437 spinlock_t refill_lock; 438 struct rb_root root; 439 440 /* largest extent in this cluster */ 441 u64 max_size; 442 443 /* first extent starting offset */ 444 u64 window_start; 445 446 /* We did a full search and couldn't create a cluster */ 447 bool fragmented; 448 449 struct btrfs_block_group *block_group; 450 /* 451 * when a cluster is allocated from a block group, we put the 452 * cluster onto a list in the block group so that it can 453 * be freed before the block group is freed. 454 */ 455 struct list_head block_group_list; 456 }; 457 458 enum btrfs_caching_type { 459 BTRFS_CACHE_NO, 460 BTRFS_CACHE_STARTED, 461 BTRFS_CACHE_FAST, 462 BTRFS_CACHE_FINISHED, 463 BTRFS_CACHE_ERROR, 464 }; 465 466 /* 467 * Tree to record all locked full stripes of a RAID5/6 block group 468 */ 469 struct btrfs_full_stripe_locks_tree { 470 struct rb_root root; 471 struct mutex lock; 472 }; 473 474 /* Discard control. */ 475 /* 476 * Async discard uses multiple lists to differentiate the discard filter 477 * parameters. Index 0 is for completely free block groups where we need to 478 * ensure the entire block group is trimmed without being lossy. Indices 479 * afterwards represent monotonically decreasing discard filter sizes to 480 * prioritize what should be discarded next. 481 */ 482 #define BTRFS_NR_DISCARD_LISTS 3 483 #define BTRFS_DISCARD_INDEX_UNUSED 0 484 #define BTRFS_DISCARD_INDEX_START 1 485 486 struct btrfs_discard_ctl { 487 struct workqueue_struct *discard_workers; 488 struct delayed_work work; 489 spinlock_t lock; 490 struct btrfs_block_group *block_group; 491 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 492 u64 prev_discard; 493 u64 prev_discard_time; 494 atomic_t discardable_extents; 495 atomic64_t discardable_bytes; 496 u64 max_discard_size; 497 u64 delay_ms; 498 u32 iops_limit; 499 u32 kbps_limit; 500 u64 discard_extent_bytes; 501 u64 discard_bitmap_bytes; 502 atomic64_t discard_bytes_saved; 503 }; 504 505 enum btrfs_orphan_cleanup_state { 506 ORPHAN_CLEANUP_STARTED = 1, 507 ORPHAN_CLEANUP_DONE = 2, 508 }; 509 510 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info); 511 512 /* fs_info */ 513 struct reloc_control; 514 struct btrfs_device; 515 struct btrfs_fs_devices; 516 struct btrfs_balance_control; 517 struct btrfs_delayed_root; 518 519 /* 520 * Block group or device which contains an active swapfile. Used for preventing 521 * unsafe operations while a swapfile is active. 522 * 523 * These are sorted on (ptr, inode) (note that a block group or device can 524 * contain more than one swapfile). We compare the pointer values because we 525 * don't actually care what the object is, we just need a quick check whether 526 * the object exists in the rbtree. 527 */ 528 struct btrfs_swapfile_pin { 529 struct rb_node node; 530 void *ptr; 531 struct inode *inode; 532 /* 533 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 534 * points to a struct btrfs_device. 535 */ 536 bool is_block_group; 537 /* 538 * Only used when 'is_block_group' is true and it is the number of 539 * extents used by a swapfile for this block group ('ptr' field). 540 */ 541 int bg_extent_count; 542 }; 543 544 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 545 546 enum { 547 BTRFS_FS_BARRIER, 548 BTRFS_FS_CLOSING_START, 549 BTRFS_FS_CLOSING_DONE, 550 BTRFS_FS_LOG_RECOVERING, 551 BTRFS_FS_OPEN, 552 BTRFS_FS_QUOTA_ENABLED, 553 BTRFS_FS_UPDATE_UUID_TREE_GEN, 554 BTRFS_FS_CREATING_FREE_SPACE_TREE, 555 BTRFS_FS_BTREE_ERR, 556 BTRFS_FS_LOG1_ERR, 557 BTRFS_FS_LOG2_ERR, 558 BTRFS_FS_QUOTA_OVERRIDE, 559 /* Used to record internally whether fs has been frozen */ 560 BTRFS_FS_FROZEN, 561 /* 562 * Indicate that balance has been set up from the ioctl and is in the 563 * main phase. The fs_info::balance_ctl is initialized. 564 * Set and cleared while holding fs_info::balance_mutex. 565 */ 566 BTRFS_FS_BALANCE_RUNNING, 567 568 /* Indicate that the cleaner thread is awake and doing something. */ 569 BTRFS_FS_CLEANER_RUNNING, 570 571 /* 572 * The checksumming has an optimized version and is considered fast, 573 * so we don't need to offload checksums to workqueues. 574 */ 575 BTRFS_FS_CSUM_IMPL_FAST, 576 577 /* Indicate that the discard workqueue can service discards. */ 578 BTRFS_FS_DISCARD_RUNNING, 579 580 /* Indicate that we need to cleanup space cache v1 */ 581 BTRFS_FS_CLEANUP_SPACE_CACHE_V1, 582 583 /* Indicate that we can't trust the free space tree for caching yet */ 584 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, 585 586 /* Indicate whether there are any tree modification log users */ 587 BTRFS_FS_TREE_MOD_LOG_USERS, 588 589 #if BITS_PER_LONG == 32 590 /* Indicate if we have error/warn message printed on 32bit systems */ 591 BTRFS_FS_32BIT_ERROR, 592 BTRFS_FS_32BIT_WARN, 593 #endif 594 }; 595 596 /* 597 * Exclusive operations (device replace, resize, device add/remove, balance) 598 */ 599 enum btrfs_exclusive_operation { 600 BTRFS_EXCLOP_NONE, 601 BTRFS_EXCLOP_BALANCE, 602 BTRFS_EXCLOP_DEV_ADD, 603 BTRFS_EXCLOP_DEV_REMOVE, 604 BTRFS_EXCLOP_DEV_REPLACE, 605 BTRFS_EXCLOP_RESIZE, 606 BTRFS_EXCLOP_SWAP_ACTIVATE, 607 }; 608 609 struct btrfs_fs_info { 610 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 611 unsigned long flags; 612 struct btrfs_root *extent_root; 613 struct btrfs_root *tree_root; 614 struct btrfs_root *chunk_root; 615 struct btrfs_root *dev_root; 616 struct btrfs_root *fs_root; 617 struct btrfs_root *csum_root; 618 struct btrfs_root *quota_root; 619 struct btrfs_root *uuid_root; 620 struct btrfs_root *free_space_root; 621 struct btrfs_root *data_reloc_root; 622 623 /* the log root tree is a directory of all the other log roots */ 624 struct btrfs_root *log_root_tree; 625 626 spinlock_t fs_roots_radix_lock; 627 struct radix_tree_root fs_roots_radix; 628 629 /* block group cache stuff */ 630 spinlock_t block_group_cache_lock; 631 u64 first_logical_byte; 632 struct rb_root block_group_cache_tree; 633 634 /* keep track of unallocated space */ 635 atomic64_t free_chunk_space; 636 637 /* Track ranges which are used by log trees blocks/logged data extents */ 638 struct extent_io_tree excluded_extents; 639 640 /* logical->physical extent mapping */ 641 struct extent_map_tree mapping_tree; 642 643 /* 644 * block reservation for extent, checksum, root tree and 645 * delayed dir index item 646 */ 647 struct btrfs_block_rsv global_block_rsv; 648 /* block reservation for metadata operations */ 649 struct btrfs_block_rsv trans_block_rsv; 650 /* block reservation for chunk tree */ 651 struct btrfs_block_rsv chunk_block_rsv; 652 /* block reservation for delayed operations */ 653 struct btrfs_block_rsv delayed_block_rsv; 654 /* block reservation for delayed refs */ 655 struct btrfs_block_rsv delayed_refs_rsv; 656 657 struct btrfs_block_rsv empty_block_rsv; 658 659 u64 generation; 660 u64 last_trans_committed; 661 u64 avg_delayed_ref_runtime; 662 663 /* 664 * this is updated to the current trans every time a full commit 665 * is required instead of the faster short fsync log commits 666 */ 667 u64 last_trans_log_full_commit; 668 unsigned long mount_opt; 669 /* 670 * Track requests for actions that need to be done during transaction 671 * commit (like for some mount options). 672 */ 673 unsigned long pending_changes; 674 unsigned long compress_type:4; 675 unsigned int compress_level; 676 u32 commit_interval; 677 /* 678 * It is a suggestive number, the read side is safe even it gets a 679 * wrong number because we will write out the data into a regular 680 * extent. The write side(mount/remount) is under ->s_umount lock, 681 * so it is also safe. 682 */ 683 u64 max_inline; 684 685 struct btrfs_transaction *running_transaction; 686 wait_queue_head_t transaction_throttle; 687 wait_queue_head_t transaction_wait; 688 wait_queue_head_t transaction_blocked_wait; 689 wait_queue_head_t async_submit_wait; 690 691 /* 692 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 693 * when they are updated. 694 * 695 * Because we do not clear the flags for ever, so we needn't use 696 * the lock on the read side. 697 * 698 * We also needn't use the lock when we mount the fs, because 699 * there is no other task which will update the flag. 700 */ 701 spinlock_t super_lock; 702 struct btrfs_super_block *super_copy; 703 struct btrfs_super_block *super_for_commit; 704 struct super_block *sb; 705 struct inode *btree_inode; 706 struct mutex tree_log_mutex; 707 struct mutex transaction_kthread_mutex; 708 struct mutex cleaner_mutex; 709 struct mutex chunk_mutex; 710 711 /* 712 * this is taken to make sure we don't set block groups ro after 713 * the free space cache has been allocated on them 714 */ 715 struct mutex ro_block_group_mutex; 716 717 /* this is used during read/modify/write to make sure 718 * no two ios are trying to mod the same stripe at the same 719 * time 720 */ 721 struct btrfs_stripe_hash_table *stripe_hash_table; 722 723 /* 724 * this protects the ordered operations list only while we are 725 * processing all of the entries on it. This way we make 726 * sure the commit code doesn't find the list temporarily empty 727 * because another function happens to be doing non-waiting preflush 728 * before jumping into the main commit. 729 */ 730 struct mutex ordered_operations_mutex; 731 732 struct rw_semaphore commit_root_sem; 733 734 struct rw_semaphore cleanup_work_sem; 735 736 struct rw_semaphore subvol_sem; 737 738 spinlock_t trans_lock; 739 /* 740 * the reloc mutex goes with the trans lock, it is taken 741 * during commit to protect us from the relocation code 742 */ 743 struct mutex reloc_mutex; 744 745 struct list_head trans_list; 746 struct list_head dead_roots; 747 struct list_head caching_block_groups; 748 749 spinlock_t delayed_iput_lock; 750 struct list_head delayed_iputs; 751 atomic_t nr_delayed_iputs; 752 wait_queue_head_t delayed_iputs_wait; 753 754 atomic64_t tree_mod_seq; 755 756 /* this protects tree_mod_log and tree_mod_seq_list */ 757 rwlock_t tree_mod_log_lock; 758 struct rb_root tree_mod_log; 759 struct list_head tree_mod_seq_list; 760 761 atomic_t async_delalloc_pages; 762 763 /* 764 * this is used to protect the following list -- ordered_roots. 765 */ 766 spinlock_t ordered_root_lock; 767 768 /* 769 * all fs/file tree roots in which there are data=ordered extents 770 * pending writeback are added into this list. 771 * 772 * these can span multiple transactions and basically include 773 * every dirty data page that isn't from nodatacow 774 */ 775 struct list_head ordered_roots; 776 777 struct mutex delalloc_root_mutex; 778 spinlock_t delalloc_root_lock; 779 /* all fs/file tree roots that have delalloc inodes. */ 780 struct list_head delalloc_roots; 781 782 /* 783 * there is a pool of worker threads for checksumming during writes 784 * and a pool for checksumming after reads. This is because readers 785 * can run with FS locks held, and the writers may be waiting for 786 * those locks. We don't want ordering in the pending list to cause 787 * deadlocks, and so the two are serviced separately. 788 * 789 * A third pool does submit_bio to avoid deadlocking with the other 790 * two 791 */ 792 struct btrfs_workqueue *workers; 793 struct btrfs_workqueue *delalloc_workers; 794 struct btrfs_workqueue *flush_workers; 795 struct btrfs_workqueue *endio_workers; 796 struct btrfs_workqueue *endio_meta_workers; 797 struct btrfs_workqueue *endio_raid56_workers; 798 struct btrfs_workqueue *rmw_workers; 799 struct btrfs_workqueue *endio_meta_write_workers; 800 struct btrfs_workqueue *endio_write_workers; 801 struct btrfs_workqueue *endio_freespace_worker; 802 struct btrfs_workqueue *caching_workers; 803 struct btrfs_workqueue *readahead_workers; 804 805 /* 806 * fixup workers take dirty pages that didn't properly go through 807 * the cow mechanism and make them safe to write. It happens 808 * for the sys_munmap function call path 809 */ 810 struct btrfs_workqueue *fixup_workers; 811 struct btrfs_workqueue *delayed_workers; 812 813 struct task_struct *transaction_kthread; 814 struct task_struct *cleaner_kthread; 815 u32 thread_pool_size; 816 817 struct kobject *space_info_kobj; 818 struct kobject *qgroups_kobj; 819 820 u64 total_pinned; 821 822 /* used to keep from writing metadata until there is a nice batch */ 823 struct percpu_counter dirty_metadata_bytes; 824 struct percpu_counter delalloc_bytes; 825 struct percpu_counter ordered_bytes; 826 s32 dirty_metadata_batch; 827 s32 delalloc_batch; 828 829 struct list_head dirty_cowonly_roots; 830 831 struct btrfs_fs_devices *fs_devices; 832 833 /* 834 * The space_info list is effectively read only after initial 835 * setup. It is populated at mount time and cleaned up after 836 * all block groups are removed. RCU is used to protect it. 837 */ 838 struct list_head space_info; 839 840 struct btrfs_space_info *data_sinfo; 841 842 struct reloc_control *reloc_ctl; 843 844 /* data_alloc_cluster is only used in ssd_spread mode */ 845 struct btrfs_free_cluster data_alloc_cluster; 846 847 /* all metadata allocations go through this cluster */ 848 struct btrfs_free_cluster meta_alloc_cluster; 849 850 /* auto defrag inodes go here */ 851 spinlock_t defrag_inodes_lock; 852 struct rb_root defrag_inodes; 853 atomic_t defrag_running; 854 855 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 856 seqlock_t profiles_lock; 857 /* 858 * these three are in extended format (availability of single 859 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 860 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 861 */ 862 u64 avail_data_alloc_bits; 863 u64 avail_metadata_alloc_bits; 864 u64 avail_system_alloc_bits; 865 866 /* restriper state */ 867 spinlock_t balance_lock; 868 struct mutex balance_mutex; 869 atomic_t balance_pause_req; 870 atomic_t balance_cancel_req; 871 struct btrfs_balance_control *balance_ctl; 872 wait_queue_head_t balance_wait_q; 873 874 u32 data_chunk_allocations; 875 u32 metadata_ratio; 876 877 void *bdev_holder; 878 879 /* private scrub information */ 880 struct mutex scrub_lock; 881 atomic_t scrubs_running; 882 atomic_t scrub_pause_req; 883 atomic_t scrubs_paused; 884 atomic_t scrub_cancel_req; 885 wait_queue_head_t scrub_pause_wait; 886 /* 887 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 888 * running. 889 */ 890 refcount_t scrub_workers_refcnt; 891 struct btrfs_workqueue *scrub_workers; 892 struct btrfs_workqueue *scrub_wr_completion_workers; 893 struct btrfs_workqueue *scrub_parity_workers; 894 895 struct btrfs_discard_ctl discard_ctl; 896 897 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 898 u32 check_integrity_print_mask; 899 #endif 900 /* is qgroup tracking in a consistent state? */ 901 u64 qgroup_flags; 902 903 /* holds configuration and tracking. Protected by qgroup_lock */ 904 struct rb_root qgroup_tree; 905 spinlock_t qgroup_lock; 906 907 /* 908 * used to avoid frequently calling ulist_alloc()/ulist_free() 909 * when doing qgroup accounting, it must be protected by qgroup_lock. 910 */ 911 struct ulist *qgroup_ulist; 912 913 /* 914 * Protect user change for quota operations. If a transaction is needed, 915 * it must be started before locking this lock. 916 */ 917 struct mutex qgroup_ioctl_lock; 918 919 /* list of dirty qgroups to be written at next commit */ 920 struct list_head dirty_qgroups; 921 922 /* used by qgroup for an efficient tree traversal */ 923 u64 qgroup_seq; 924 925 /* qgroup rescan items */ 926 struct mutex qgroup_rescan_lock; /* protects the progress item */ 927 struct btrfs_key qgroup_rescan_progress; 928 struct btrfs_workqueue *qgroup_rescan_workers; 929 struct completion qgroup_rescan_completion; 930 struct btrfs_work qgroup_rescan_work; 931 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 932 933 /* filesystem state */ 934 unsigned long fs_state; 935 936 struct btrfs_delayed_root *delayed_root; 937 938 /* readahead tree */ 939 spinlock_t reada_lock; 940 struct radix_tree_root reada_tree; 941 942 /* readahead works cnt */ 943 atomic_t reada_works_cnt; 944 945 /* Extent buffer radix tree */ 946 spinlock_t buffer_lock; 947 /* Entries are eb->start / sectorsize */ 948 struct radix_tree_root buffer_radix; 949 950 /* next backup root to be overwritten */ 951 int backup_root_index; 952 953 /* device replace state */ 954 struct btrfs_dev_replace dev_replace; 955 956 struct semaphore uuid_tree_rescan_sem; 957 958 /* Used to reclaim the metadata space in the background. */ 959 struct work_struct async_reclaim_work; 960 struct work_struct async_data_reclaim_work; 961 struct work_struct preempt_reclaim_work; 962 963 /* Reclaim partially filled block groups in the background */ 964 struct work_struct reclaim_bgs_work; 965 struct list_head reclaim_bgs; 966 int bg_reclaim_threshold; 967 968 spinlock_t unused_bgs_lock; 969 struct list_head unused_bgs; 970 struct mutex unused_bg_unpin_mutex; 971 /* Protect block groups that are going to be deleted */ 972 struct mutex reclaim_bgs_lock; 973 974 /* Cached block sizes */ 975 u32 nodesize; 976 u32 sectorsize; 977 /* ilog2 of sectorsize, use to avoid 64bit division */ 978 u32 sectorsize_bits; 979 u32 csum_size; 980 u32 csums_per_leaf; 981 u32 stripesize; 982 983 /* Block groups and devices containing active swapfiles. */ 984 spinlock_t swapfile_pins_lock; 985 struct rb_root swapfile_pins; 986 987 struct crypto_shash *csum_shash; 988 989 /* 990 * Number of send operations in progress. 991 * Updated while holding fs_info::balance_mutex. 992 */ 993 int send_in_progress; 994 995 /* Type of exclusive operation running */ 996 unsigned long exclusive_operation; 997 998 /* 999 * Zone size > 0 when in ZONED mode, otherwise it's used for a check 1000 * if the mode is enabled 1001 */ 1002 union { 1003 u64 zone_size; 1004 u64 zoned; 1005 }; 1006 1007 /* Max size to emit ZONE_APPEND write command */ 1008 u64 max_zone_append_size; 1009 struct mutex zoned_meta_io_lock; 1010 spinlock_t treelog_bg_lock; 1011 u64 treelog_bg; 1012 1013 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1014 spinlock_t ref_verify_lock; 1015 struct rb_root block_tree; 1016 #endif 1017 1018 #ifdef CONFIG_BTRFS_DEBUG 1019 struct kobject *debug_kobj; 1020 struct kobject *discard_debug_kobj; 1021 struct list_head allocated_roots; 1022 1023 spinlock_t eb_leak_lock; 1024 struct list_head allocated_ebs; 1025 #endif 1026 }; 1027 1028 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1029 { 1030 return sb->s_fs_info; 1031 } 1032 1033 /* 1034 * The state of btrfs root 1035 */ 1036 enum { 1037 /* 1038 * btrfs_record_root_in_trans is a multi-step process, and it can race 1039 * with the balancing code. But the race is very small, and only the 1040 * first time the root is added to each transaction. So IN_TRANS_SETUP 1041 * is used to tell us when more checks are required 1042 */ 1043 BTRFS_ROOT_IN_TRANS_SETUP, 1044 1045 /* 1046 * Set if tree blocks of this root can be shared by other roots. 1047 * Only subvolume trees and their reloc trees have this bit set. 1048 * Conflicts with TRACK_DIRTY bit. 1049 * 1050 * This affects two things: 1051 * 1052 * - How balance works 1053 * For shareable roots, we need to use reloc tree and do path 1054 * replacement for balance, and need various pre/post hooks for 1055 * snapshot creation to handle them. 1056 * 1057 * While for non-shareable trees, we just simply do a tree search 1058 * with COW. 1059 * 1060 * - How dirty roots are tracked 1061 * For shareable roots, btrfs_record_root_in_trans() is needed to 1062 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1063 * don't need to set this manually. 1064 */ 1065 BTRFS_ROOT_SHAREABLE, 1066 BTRFS_ROOT_TRACK_DIRTY, 1067 BTRFS_ROOT_IN_RADIX, 1068 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1069 BTRFS_ROOT_DEFRAG_RUNNING, 1070 BTRFS_ROOT_FORCE_COW, 1071 BTRFS_ROOT_MULTI_LOG_TASKS, 1072 BTRFS_ROOT_DIRTY, 1073 BTRFS_ROOT_DELETING, 1074 1075 /* 1076 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1077 * 1078 * Set for the subvolume tree owning the reloc tree. 1079 */ 1080 BTRFS_ROOT_DEAD_RELOC_TREE, 1081 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1082 BTRFS_ROOT_DEAD_TREE, 1083 /* The root has a log tree. Used for subvolume roots and the tree root. */ 1084 BTRFS_ROOT_HAS_LOG_TREE, 1085 /* Qgroup flushing is in progress */ 1086 BTRFS_ROOT_QGROUP_FLUSHING, 1087 }; 1088 1089 /* 1090 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1091 * code. For detail check comment in fs/btrfs/qgroup.c. 1092 */ 1093 struct btrfs_qgroup_swapped_blocks { 1094 spinlock_t lock; 1095 /* RM_EMPTY_ROOT() of above blocks[] */ 1096 bool swapped; 1097 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1098 }; 1099 1100 /* 1101 * in ram representation of the tree. extent_root is used for all allocations 1102 * and for the extent tree extent_root root. 1103 */ 1104 struct btrfs_root { 1105 struct extent_buffer *node; 1106 1107 struct extent_buffer *commit_root; 1108 struct btrfs_root *log_root; 1109 struct btrfs_root *reloc_root; 1110 1111 unsigned long state; 1112 struct btrfs_root_item root_item; 1113 struct btrfs_key root_key; 1114 struct btrfs_fs_info *fs_info; 1115 struct extent_io_tree dirty_log_pages; 1116 1117 struct mutex objectid_mutex; 1118 1119 spinlock_t accounting_lock; 1120 struct btrfs_block_rsv *block_rsv; 1121 1122 struct mutex log_mutex; 1123 wait_queue_head_t log_writer_wait; 1124 wait_queue_head_t log_commit_wait[2]; 1125 struct list_head log_ctxs[2]; 1126 /* Used only for log trees of subvolumes, not for the log root tree */ 1127 atomic_t log_writers; 1128 atomic_t log_commit[2]; 1129 /* Used only for log trees of subvolumes, not for the log root tree */ 1130 atomic_t log_batch; 1131 int log_transid; 1132 /* No matter the commit succeeds or not*/ 1133 int log_transid_committed; 1134 /* Just be updated when the commit succeeds. */ 1135 int last_log_commit; 1136 pid_t log_start_pid; 1137 1138 u64 last_trans; 1139 1140 u32 type; 1141 1142 u64 free_objectid; 1143 1144 struct btrfs_key defrag_progress; 1145 struct btrfs_key defrag_max; 1146 1147 /* The dirty list is only used by non-shareable roots */ 1148 struct list_head dirty_list; 1149 1150 struct list_head root_list; 1151 1152 spinlock_t log_extents_lock[2]; 1153 struct list_head logged_list[2]; 1154 1155 int orphan_cleanup_state; 1156 1157 spinlock_t inode_lock; 1158 /* red-black tree that keeps track of in-memory inodes */ 1159 struct rb_root inode_tree; 1160 1161 /* 1162 * radix tree that keeps track of delayed nodes of every inode, 1163 * protected by inode_lock 1164 */ 1165 struct radix_tree_root delayed_nodes_tree; 1166 /* 1167 * right now this just gets used so that a root has its own devid 1168 * for stat. It may be used for more later 1169 */ 1170 dev_t anon_dev; 1171 1172 spinlock_t root_item_lock; 1173 refcount_t refs; 1174 1175 struct mutex delalloc_mutex; 1176 spinlock_t delalloc_lock; 1177 /* 1178 * all of the inodes that have delalloc bytes. It is possible for 1179 * this list to be empty even when there is still dirty data=ordered 1180 * extents waiting to finish IO. 1181 */ 1182 struct list_head delalloc_inodes; 1183 struct list_head delalloc_root; 1184 u64 nr_delalloc_inodes; 1185 1186 struct mutex ordered_extent_mutex; 1187 /* 1188 * this is used by the balancing code to wait for all the pending 1189 * ordered extents 1190 */ 1191 spinlock_t ordered_extent_lock; 1192 1193 /* 1194 * all of the data=ordered extents pending writeback 1195 * these can span multiple transactions and basically include 1196 * every dirty data page that isn't from nodatacow 1197 */ 1198 struct list_head ordered_extents; 1199 struct list_head ordered_root; 1200 u64 nr_ordered_extents; 1201 1202 /* 1203 * Not empty if this subvolume root has gone through tree block swap 1204 * (relocation) 1205 * 1206 * Will be used by reloc_control::dirty_subvol_roots. 1207 */ 1208 struct list_head reloc_dirty_list; 1209 1210 /* 1211 * Number of currently running SEND ioctls to prevent 1212 * manipulation with the read-only status via SUBVOL_SETFLAGS 1213 */ 1214 int send_in_progress; 1215 /* 1216 * Number of currently running deduplication operations that have a 1217 * destination inode belonging to this root. Protected by the lock 1218 * root_item_lock. 1219 */ 1220 int dedupe_in_progress; 1221 /* For exclusion of snapshot creation and nocow writes */ 1222 struct btrfs_drew_lock snapshot_lock; 1223 1224 atomic_t snapshot_force_cow; 1225 1226 /* For qgroup metadata reserved space */ 1227 spinlock_t qgroup_meta_rsv_lock; 1228 u64 qgroup_meta_rsv_pertrans; 1229 u64 qgroup_meta_rsv_prealloc; 1230 wait_queue_head_t qgroup_flush_wait; 1231 1232 /* Number of active swapfiles */ 1233 atomic_t nr_swapfiles; 1234 1235 /* Record pairs of swapped blocks for qgroup */ 1236 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1237 1238 /* Used only by log trees, when logging csum items */ 1239 struct extent_io_tree log_csum_range; 1240 1241 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1242 u64 alloc_bytenr; 1243 #endif 1244 1245 #ifdef CONFIG_BTRFS_DEBUG 1246 struct list_head leak_list; 1247 #endif 1248 }; 1249 1250 /* 1251 * Structure that conveys information about an extent that is going to replace 1252 * all the extents in a file range. 1253 */ 1254 struct btrfs_replace_extent_info { 1255 u64 disk_offset; 1256 u64 disk_len; 1257 u64 data_offset; 1258 u64 data_len; 1259 u64 file_offset; 1260 /* Pointer to a file extent item of type regular or prealloc. */ 1261 char *extent_buf; 1262 /* 1263 * Set to true when attempting to replace a file range with a new extent 1264 * described by this structure, set to false when attempting to clone an 1265 * existing extent into a file range. 1266 */ 1267 bool is_new_extent; 1268 /* Meaningful only if is_new_extent is true. */ 1269 int qgroup_reserved; 1270 /* 1271 * Meaningful only if is_new_extent is true. 1272 * Used to track how many extent items we have already inserted in a 1273 * subvolume tree that refer to the extent described by this structure, 1274 * so that we know when to create a new delayed ref or update an existing 1275 * one. 1276 */ 1277 int insertions; 1278 }; 1279 1280 /* Arguments for btrfs_drop_extents() */ 1281 struct btrfs_drop_extents_args { 1282 /* Input parameters */ 1283 1284 /* 1285 * If NULL, btrfs_drop_extents() will allocate and free its own path. 1286 * If 'replace_extent' is true, this must not be NULL. Also the path 1287 * is always released except if 'replace_extent' is true and 1288 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case 1289 * the path is kept locked. 1290 */ 1291 struct btrfs_path *path; 1292 /* Start offset of the range to drop extents from */ 1293 u64 start; 1294 /* End (exclusive, last byte + 1) of the range to drop extents from */ 1295 u64 end; 1296 /* If true drop all the extent maps in the range */ 1297 bool drop_cache; 1298 /* 1299 * If true it means we want to insert a new extent after dropping all 1300 * the extents in the range. If this is true, the 'extent_item_size' 1301 * parameter must be set as well and the 'extent_inserted' field will 1302 * be set to true by btrfs_drop_extents() if it could insert the new 1303 * extent. 1304 * Note: when this is set to true the path must not be NULL. 1305 */ 1306 bool replace_extent; 1307 /* 1308 * Used if 'replace_extent' is true. Size of the file extent item to 1309 * insert after dropping all existing extents in the range 1310 */ 1311 u32 extent_item_size; 1312 1313 /* Output parameters */ 1314 1315 /* 1316 * Set to the minimum between the input parameter 'end' and the end 1317 * (exclusive, last byte + 1) of the last dropped extent. This is always 1318 * set even if btrfs_drop_extents() returns an error. 1319 */ 1320 u64 drop_end; 1321 /* 1322 * The number of allocated bytes found in the range. This can be smaller 1323 * than the range's length when there are holes in the range. 1324 */ 1325 u64 bytes_found; 1326 /* 1327 * Only set if 'replace_extent' is true. Set to true if we were able 1328 * to insert a replacement extent after dropping all extents in the 1329 * range, otherwise set to false by btrfs_drop_extents(). 1330 * Also, if btrfs_drop_extents() has set this to true it means it 1331 * returned with the path locked, otherwise if it has set this to 1332 * false it has returned with the path released. 1333 */ 1334 bool extent_inserted; 1335 }; 1336 1337 struct btrfs_file_private { 1338 void *filldir_buf; 1339 }; 1340 1341 1342 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1343 { 1344 1345 return info->nodesize - sizeof(struct btrfs_header); 1346 } 1347 1348 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1349 1350 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1351 { 1352 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1353 } 1354 1355 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1356 { 1357 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1358 } 1359 1360 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1361 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1362 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1363 { 1364 return BTRFS_MAX_ITEM_SIZE(info) - 1365 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1366 } 1367 1368 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1369 { 1370 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1371 } 1372 1373 /* 1374 * Flags for mount options. 1375 * 1376 * Note: don't forget to add new options to btrfs_show_options() 1377 */ 1378 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1379 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1380 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1381 #define BTRFS_MOUNT_SSD (1 << 3) 1382 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1383 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1384 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1385 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1386 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1387 #define BTRFS_MOUNT_NOSSD (1 << 9) 1388 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1389 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1390 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1391 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1392 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1393 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1394 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1395 /* bit 17 is free */ 1396 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1397 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1398 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1399 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1400 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1401 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1402 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1403 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1404 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1405 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1406 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1407 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1408 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30) 1409 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31) 1410 1411 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1412 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1413 1414 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1415 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1416 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1417 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1418 BTRFS_MOUNT_##opt) 1419 1420 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1421 do { \ 1422 if (!btrfs_test_opt(fs_info, opt)) \ 1423 btrfs_info(fs_info, fmt, ##args); \ 1424 btrfs_set_opt(fs_info->mount_opt, opt); \ 1425 } while (0) 1426 1427 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1428 do { \ 1429 if (btrfs_test_opt(fs_info, opt)) \ 1430 btrfs_info(fs_info, fmt, ##args); \ 1431 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1432 } while (0) 1433 1434 /* 1435 * Requests for changes that need to be done during transaction commit. 1436 * 1437 * Internal mount options that are used for special handling of the real 1438 * mount options (eg. cannot be set during remount and have to be set during 1439 * transaction commit) 1440 */ 1441 1442 #define BTRFS_PENDING_COMMIT (0) 1443 1444 #define btrfs_test_pending(info, opt) \ 1445 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1446 #define btrfs_set_pending(info, opt) \ 1447 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1448 #define btrfs_clear_pending(info, opt) \ 1449 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1450 1451 /* 1452 * Helpers for setting pending mount option changes. 1453 * 1454 * Expects corresponding macros 1455 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1456 */ 1457 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1458 do { \ 1459 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1460 btrfs_info((info), fmt, ##args); \ 1461 btrfs_set_pending((info), SET_##opt); \ 1462 btrfs_clear_pending((info), CLEAR_##opt); \ 1463 } \ 1464 } while(0) 1465 1466 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1467 do { \ 1468 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1469 btrfs_info((info), fmt, ##args); \ 1470 btrfs_set_pending((info), CLEAR_##opt); \ 1471 btrfs_clear_pending((info), SET_##opt); \ 1472 } \ 1473 } while(0) 1474 1475 /* 1476 * Inode flags 1477 */ 1478 #define BTRFS_INODE_NODATASUM (1 << 0) 1479 #define BTRFS_INODE_NODATACOW (1 << 1) 1480 #define BTRFS_INODE_READONLY (1 << 2) 1481 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1482 #define BTRFS_INODE_PREALLOC (1 << 4) 1483 #define BTRFS_INODE_SYNC (1 << 5) 1484 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1485 #define BTRFS_INODE_APPEND (1 << 7) 1486 #define BTRFS_INODE_NODUMP (1 << 8) 1487 #define BTRFS_INODE_NOATIME (1 << 9) 1488 #define BTRFS_INODE_DIRSYNC (1 << 10) 1489 #define BTRFS_INODE_COMPRESS (1 << 11) 1490 1491 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1492 1493 #define BTRFS_INODE_FLAG_MASK \ 1494 (BTRFS_INODE_NODATASUM | \ 1495 BTRFS_INODE_NODATACOW | \ 1496 BTRFS_INODE_READONLY | \ 1497 BTRFS_INODE_NOCOMPRESS | \ 1498 BTRFS_INODE_PREALLOC | \ 1499 BTRFS_INODE_SYNC | \ 1500 BTRFS_INODE_IMMUTABLE | \ 1501 BTRFS_INODE_APPEND | \ 1502 BTRFS_INODE_NODUMP | \ 1503 BTRFS_INODE_NOATIME | \ 1504 BTRFS_INODE_DIRSYNC | \ 1505 BTRFS_INODE_COMPRESS | \ 1506 BTRFS_INODE_ROOT_ITEM_INIT) 1507 1508 struct btrfs_map_token { 1509 struct extent_buffer *eb; 1510 char *kaddr; 1511 unsigned long offset; 1512 }; 1513 1514 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1515 ((bytes) >> (fs_info)->sectorsize_bits) 1516 1517 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1518 struct extent_buffer *eb) 1519 { 1520 token->eb = eb; 1521 token->kaddr = page_address(eb->pages[0]); 1522 token->offset = 0; 1523 } 1524 1525 /* some macros to generate set/get functions for the struct fields. This 1526 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1527 * one for u8: 1528 */ 1529 #define le8_to_cpu(v) (v) 1530 #define cpu_to_le8(v) (v) 1531 #define __le8 u8 1532 1533 static inline u8 get_unaligned_le8(const void *p) 1534 { 1535 return *(u8 *)p; 1536 } 1537 1538 static inline void put_unaligned_le8(u8 val, void *p) 1539 { 1540 *(u8 *)p = val; 1541 } 1542 1543 #define read_eb_member(eb, ptr, type, member, result) (\ 1544 read_extent_buffer(eb, (char *)(result), \ 1545 ((unsigned long)(ptr)) + \ 1546 offsetof(type, member), \ 1547 sizeof(((type *)0)->member))) 1548 1549 #define write_eb_member(eb, ptr, type, member, result) (\ 1550 write_extent_buffer(eb, (char *)(result), \ 1551 ((unsigned long)(ptr)) + \ 1552 offsetof(type, member), \ 1553 sizeof(((type *)0)->member))) 1554 1555 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1556 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1557 const void *ptr, unsigned long off); \ 1558 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1559 const void *ptr, unsigned long off, \ 1560 u##bits val); \ 1561 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1562 const void *ptr, unsigned long off); \ 1563 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1564 unsigned long off, u##bits val); 1565 1566 DECLARE_BTRFS_SETGET_BITS(8) 1567 DECLARE_BTRFS_SETGET_BITS(16) 1568 DECLARE_BTRFS_SETGET_BITS(32) 1569 DECLARE_BTRFS_SETGET_BITS(64) 1570 1571 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1572 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1573 const type *s) \ 1574 { \ 1575 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1576 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1577 } \ 1578 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1579 u##bits val) \ 1580 { \ 1581 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1582 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1583 } \ 1584 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1585 const type *s) \ 1586 { \ 1587 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1588 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1589 } \ 1590 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1591 type *s, u##bits val) \ 1592 { \ 1593 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1594 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1595 } 1596 1597 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1598 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1599 { \ 1600 const type *p = page_address(eb->pages[0]) + \ 1601 offset_in_page(eb->start); \ 1602 return get_unaligned_le##bits(&p->member); \ 1603 } \ 1604 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1605 u##bits val) \ 1606 { \ 1607 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \ 1608 put_unaligned_le##bits(val, &p->member); \ 1609 } 1610 1611 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1612 static inline u##bits btrfs_##name(const type *s) \ 1613 { \ 1614 return get_unaligned_le##bits(&s->member); \ 1615 } \ 1616 static inline void btrfs_set_##name(type *s, u##bits val) \ 1617 { \ 1618 put_unaligned_le##bits(val, &s->member); \ 1619 } 1620 1621 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1622 struct btrfs_dev_item *s) 1623 { 1624 BUILD_BUG_ON(sizeof(u64) != 1625 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1626 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1627 total_bytes)); 1628 } 1629 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1630 struct btrfs_dev_item *s, 1631 u64 val) 1632 { 1633 BUILD_BUG_ON(sizeof(u64) != 1634 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1635 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1636 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1637 } 1638 1639 1640 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1641 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1642 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1643 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1644 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1645 start_offset, 64); 1646 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1647 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1648 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1649 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1650 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1651 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1652 1653 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1654 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1655 total_bytes, 64); 1656 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1657 bytes_used, 64); 1658 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1659 io_align, 32); 1660 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1661 io_width, 32); 1662 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1663 sector_size, 32); 1664 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1665 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1666 dev_group, 32); 1667 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1668 seek_speed, 8); 1669 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1670 bandwidth, 8); 1671 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1672 generation, 64); 1673 1674 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1675 { 1676 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1677 } 1678 1679 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1680 { 1681 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1682 } 1683 1684 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1685 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1686 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1687 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1688 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1689 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1690 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1691 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1692 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1693 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1694 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1695 1696 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1697 { 1698 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1699 } 1700 1701 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1702 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1703 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1704 stripe_len, 64); 1705 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1706 io_align, 32); 1707 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1708 io_width, 32); 1709 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1710 sector_size, 32); 1711 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1712 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1713 num_stripes, 16); 1714 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1715 sub_stripes, 16); 1716 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1717 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1718 1719 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1720 int nr) 1721 { 1722 unsigned long offset = (unsigned long)c; 1723 offset += offsetof(struct btrfs_chunk, stripe); 1724 offset += nr * sizeof(struct btrfs_stripe); 1725 return (struct btrfs_stripe *)offset; 1726 } 1727 1728 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1729 { 1730 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1731 } 1732 1733 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1734 struct btrfs_chunk *c, int nr) 1735 { 1736 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1737 } 1738 1739 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1740 struct btrfs_chunk *c, int nr) 1741 { 1742 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1743 } 1744 1745 /* struct btrfs_block_group_item */ 1746 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1747 used, 64); 1748 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1749 used, 64); 1750 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1751 struct btrfs_block_group_item, chunk_objectid, 64); 1752 1753 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1754 struct btrfs_block_group_item, chunk_objectid, 64); 1755 BTRFS_SETGET_FUNCS(block_group_flags, 1756 struct btrfs_block_group_item, flags, 64); 1757 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1758 struct btrfs_block_group_item, flags, 64); 1759 1760 /* struct btrfs_free_space_info */ 1761 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1762 extent_count, 32); 1763 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1764 1765 /* struct btrfs_inode_ref */ 1766 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1767 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1768 1769 /* struct btrfs_inode_extref */ 1770 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1771 parent_objectid, 64); 1772 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1773 name_len, 16); 1774 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1775 1776 /* struct btrfs_inode_item */ 1777 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1778 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1779 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1780 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1781 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1782 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1783 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1784 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1785 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1786 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1787 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1788 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1789 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1790 generation, 64); 1791 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1792 sequence, 64); 1793 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1794 transid, 64); 1795 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1796 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1797 nbytes, 64); 1798 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1799 block_group, 64); 1800 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1801 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1802 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1803 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1804 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1805 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1806 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1807 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1808 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1809 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1810 1811 /* struct btrfs_dev_extent */ 1812 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1813 chunk_tree, 64); 1814 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1815 chunk_objectid, 64); 1816 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1817 chunk_offset, 64); 1818 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1819 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1820 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1821 generation, 64); 1822 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1823 1824 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1825 1826 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1827 struct btrfs_tree_block_info *item, 1828 struct btrfs_disk_key *key) 1829 { 1830 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1831 } 1832 1833 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1834 struct btrfs_tree_block_info *item, 1835 struct btrfs_disk_key *key) 1836 { 1837 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1838 } 1839 1840 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1841 root, 64); 1842 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1843 objectid, 64); 1844 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1845 offset, 64); 1846 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1847 count, 32); 1848 1849 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1850 count, 32); 1851 1852 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1853 type, 8); 1854 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1855 offset, 64); 1856 1857 static inline u32 btrfs_extent_inline_ref_size(int type) 1858 { 1859 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1860 type == BTRFS_SHARED_BLOCK_REF_KEY) 1861 return sizeof(struct btrfs_extent_inline_ref); 1862 if (type == BTRFS_SHARED_DATA_REF_KEY) 1863 return sizeof(struct btrfs_shared_data_ref) + 1864 sizeof(struct btrfs_extent_inline_ref); 1865 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1866 return sizeof(struct btrfs_extent_data_ref) + 1867 offsetof(struct btrfs_extent_inline_ref, offset); 1868 return 0; 1869 } 1870 1871 /* struct btrfs_node */ 1872 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1873 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1874 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1875 blockptr, 64); 1876 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1877 generation, 64); 1878 1879 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1880 { 1881 unsigned long ptr; 1882 ptr = offsetof(struct btrfs_node, ptrs) + 1883 sizeof(struct btrfs_key_ptr) * nr; 1884 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1885 } 1886 1887 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1888 int nr, u64 val) 1889 { 1890 unsigned long ptr; 1891 ptr = offsetof(struct btrfs_node, ptrs) + 1892 sizeof(struct btrfs_key_ptr) * nr; 1893 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1894 } 1895 1896 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1897 { 1898 unsigned long ptr; 1899 ptr = offsetof(struct btrfs_node, ptrs) + 1900 sizeof(struct btrfs_key_ptr) * nr; 1901 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1902 } 1903 1904 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1905 int nr, u64 val) 1906 { 1907 unsigned long ptr; 1908 ptr = offsetof(struct btrfs_node, ptrs) + 1909 sizeof(struct btrfs_key_ptr) * nr; 1910 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1911 } 1912 1913 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1914 { 1915 return offsetof(struct btrfs_node, ptrs) + 1916 sizeof(struct btrfs_key_ptr) * nr; 1917 } 1918 1919 void btrfs_node_key(const struct extent_buffer *eb, 1920 struct btrfs_disk_key *disk_key, int nr); 1921 1922 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1923 struct btrfs_disk_key *disk_key, int nr) 1924 { 1925 unsigned long ptr; 1926 ptr = btrfs_node_key_ptr_offset(nr); 1927 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1928 struct btrfs_key_ptr, key, disk_key); 1929 } 1930 1931 /* struct btrfs_item */ 1932 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1933 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1934 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1935 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1936 1937 static inline unsigned long btrfs_item_nr_offset(int nr) 1938 { 1939 return offsetof(struct btrfs_leaf, items) + 1940 sizeof(struct btrfs_item) * nr; 1941 } 1942 1943 static inline struct btrfs_item *btrfs_item_nr(int nr) 1944 { 1945 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1946 } 1947 1948 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1949 struct btrfs_item *item) 1950 { 1951 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1952 } 1953 1954 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1955 { 1956 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1957 } 1958 1959 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1960 { 1961 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1962 } 1963 1964 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1965 { 1966 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1967 } 1968 1969 static inline void btrfs_item_key(const struct extent_buffer *eb, 1970 struct btrfs_disk_key *disk_key, int nr) 1971 { 1972 struct btrfs_item *item = btrfs_item_nr(nr); 1973 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1974 } 1975 1976 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1977 struct btrfs_disk_key *disk_key, int nr) 1978 { 1979 struct btrfs_item *item = btrfs_item_nr(nr); 1980 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1981 } 1982 1983 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1984 1985 /* 1986 * struct btrfs_root_ref 1987 */ 1988 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1989 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1990 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1991 1992 /* struct btrfs_dir_item */ 1993 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1994 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1995 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1996 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1997 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1998 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1999 data_len, 16); 2000 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 2001 name_len, 16); 2002 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 2003 transid, 64); 2004 2005 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 2006 const struct btrfs_dir_item *item, 2007 struct btrfs_disk_key *key) 2008 { 2009 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 2010 } 2011 2012 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 2013 struct btrfs_dir_item *item, 2014 const struct btrfs_disk_key *key) 2015 { 2016 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 2017 } 2018 2019 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 2020 num_entries, 64); 2021 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 2022 num_bitmaps, 64); 2023 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 2024 generation, 64); 2025 2026 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 2027 const struct btrfs_free_space_header *h, 2028 struct btrfs_disk_key *key) 2029 { 2030 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2031 } 2032 2033 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 2034 struct btrfs_free_space_header *h, 2035 const struct btrfs_disk_key *key) 2036 { 2037 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2038 } 2039 2040 /* struct btrfs_disk_key */ 2041 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2042 objectid, 64); 2043 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2044 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2045 2046 #ifdef __LITTLE_ENDIAN 2047 2048 /* 2049 * Optimized helpers for little-endian architectures where CPU and on-disk 2050 * structures have the same endianness and we can skip conversions. 2051 */ 2052 2053 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 2054 const struct btrfs_disk_key *disk_key) 2055 { 2056 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 2057 } 2058 2059 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 2060 const struct btrfs_key *cpu_key) 2061 { 2062 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 2063 } 2064 2065 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2066 struct btrfs_key *cpu_key, int nr) 2067 { 2068 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2069 2070 btrfs_node_key(eb, disk_key, nr); 2071 } 2072 2073 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2074 struct btrfs_key *cpu_key, int nr) 2075 { 2076 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2077 2078 btrfs_item_key(eb, disk_key, nr); 2079 } 2080 2081 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2082 const struct btrfs_dir_item *item, 2083 struct btrfs_key *cpu_key) 2084 { 2085 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2086 2087 btrfs_dir_item_key(eb, item, disk_key); 2088 } 2089 2090 #else 2091 2092 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2093 const struct btrfs_disk_key *disk) 2094 { 2095 cpu->offset = le64_to_cpu(disk->offset); 2096 cpu->type = disk->type; 2097 cpu->objectid = le64_to_cpu(disk->objectid); 2098 } 2099 2100 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2101 const struct btrfs_key *cpu) 2102 { 2103 disk->offset = cpu_to_le64(cpu->offset); 2104 disk->type = cpu->type; 2105 disk->objectid = cpu_to_le64(cpu->objectid); 2106 } 2107 2108 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2109 struct btrfs_key *key, int nr) 2110 { 2111 struct btrfs_disk_key disk_key; 2112 btrfs_node_key(eb, &disk_key, nr); 2113 btrfs_disk_key_to_cpu(key, &disk_key); 2114 } 2115 2116 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2117 struct btrfs_key *key, int nr) 2118 { 2119 struct btrfs_disk_key disk_key; 2120 btrfs_item_key(eb, &disk_key, nr); 2121 btrfs_disk_key_to_cpu(key, &disk_key); 2122 } 2123 2124 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2125 const struct btrfs_dir_item *item, 2126 struct btrfs_key *key) 2127 { 2128 struct btrfs_disk_key disk_key; 2129 btrfs_dir_item_key(eb, item, &disk_key); 2130 btrfs_disk_key_to_cpu(key, &disk_key); 2131 } 2132 2133 #endif 2134 2135 /* struct btrfs_header */ 2136 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2137 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2138 generation, 64); 2139 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2140 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2141 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2142 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2143 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2144 generation, 64); 2145 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2146 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2147 nritems, 32); 2148 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2149 2150 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2151 { 2152 return (btrfs_header_flags(eb) & flag) == flag; 2153 } 2154 2155 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2156 { 2157 u64 flags = btrfs_header_flags(eb); 2158 btrfs_set_header_flags(eb, flags | flag); 2159 } 2160 2161 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2162 { 2163 u64 flags = btrfs_header_flags(eb); 2164 btrfs_set_header_flags(eb, flags & ~flag); 2165 } 2166 2167 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2168 { 2169 u64 flags = btrfs_header_flags(eb); 2170 return flags >> BTRFS_BACKREF_REV_SHIFT; 2171 } 2172 2173 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2174 int rev) 2175 { 2176 u64 flags = btrfs_header_flags(eb); 2177 flags &= ~BTRFS_BACKREF_REV_MASK; 2178 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2179 btrfs_set_header_flags(eb, flags); 2180 } 2181 2182 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2183 { 2184 return btrfs_header_level(eb) == 0; 2185 } 2186 2187 /* struct btrfs_root_item */ 2188 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2189 generation, 64); 2190 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2191 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2192 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2193 2194 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2195 generation, 64); 2196 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2197 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8); 2198 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2199 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2200 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2201 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2202 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2203 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2204 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2205 last_snapshot, 64); 2206 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2207 generation_v2, 64); 2208 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2209 ctransid, 64); 2210 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2211 otransid, 64); 2212 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2213 stransid, 64); 2214 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2215 rtransid, 64); 2216 2217 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2218 { 2219 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2220 } 2221 2222 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2223 { 2224 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2225 } 2226 2227 /* struct btrfs_root_backup */ 2228 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2229 tree_root, 64); 2230 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2231 tree_root_gen, 64); 2232 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2233 tree_root_level, 8); 2234 2235 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2236 chunk_root, 64); 2237 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2238 chunk_root_gen, 64); 2239 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2240 chunk_root_level, 8); 2241 2242 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2243 extent_root, 64); 2244 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2245 extent_root_gen, 64); 2246 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2247 extent_root_level, 8); 2248 2249 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2250 fs_root, 64); 2251 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2252 fs_root_gen, 64); 2253 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2254 fs_root_level, 8); 2255 2256 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2257 dev_root, 64); 2258 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2259 dev_root_gen, 64); 2260 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2261 dev_root_level, 8); 2262 2263 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2264 csum_root, 64); 2265 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2266 csum_root_gen, 64); 2267 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2268 csum_root_level, 8); 2269 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2270 total_bytes, 64); 2271 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2272 bytes_used, 64); 2273 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2274 num_devices, 64); 2275 2276 /* struct btrfs_balance_item */ 2277 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2278 2279 static inline void btrfs_balance_data(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, data, ba); 2284 } 2285 2286 static inline void btrfs_set_balance_data(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, data, ba); 2291 } 2292 2293 static inline void btrfs_balance_meta(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, meta, ba); 2298 } 2299 2300 static inline void btrfs_set_balance_meta(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, meta, ba); 2305 } 2306 2307 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2308 const struct btrfs_balance_item *bi, 2309 struct btrfs_disk_balance_args *ba) 2310 { 2311 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2312 } 2313 2314 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2315 struct btrfs_balance_item *bi, 2316 const struct btrfs_disk_balance_args *ba) 2317 { 2318 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2319 } 2320 2321 static inline void 2322 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2323 const struct btrfs_disk_balance_args *disk) 2324 { 2325 memset(cpu, 0, sizeof(*cpu)); 2326 2327 cpu->profiles = le64_to_cpu(disk->profiles); 2328 cpu->usage = le64_to_cpu(disk->usage); 2329 cpu->devid = le64_to_cpu(disk->devid); 2330 cpu->pstart = le64_to_cpu(disk->pstart); 2331 cpu->pend = le64_to_cpu(disk->pend); 2332 cpu->vstart = le64_to_cpu(disk->vstart); 2333 cpu->vend = le64_to_cpu(disk->vend); 2334 cpu->target = le64_to_cpu(disk->target); 2335 cpu->flags = le64_to_cpu(disk->flags); 2336 cpu->limit = le64_to_cpu(disk->limit); 2337 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2338 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2339 } 2340 2341 static inline void 2342 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2343 const struct btrfs_balance_args *cpu) 2344 { 2345 memset(disk, 0, sizeof(*disk)); 2346 2347 disk->profiles = cpu_to_le64(cpu->profiles); 2348 disk->usage = cpu_to_le64(cpu->usage); 2349 disk->devid = cpu_to_le64(cpu->devid); 2350 disk->pstart = cpu_to_le64(cpu->pstart); 2351 disk->pend = cpu_to_le64(cpu->pend); 2352 disk->vstart = cpu_to_le64(cpu->vstart); 2353 disk->vend = cpu_to_le64(cpu->vend); 2354 disk->target = cpu_to_le64(cpu->target); 2355 disk->flags = cpu_to_le64(cpu->flags); 2356 disk->limit = cpu_to_le64(cpu->limit); 2357 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2358 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2359 } 2360 2361 /* struct btrfs_super_block */ 2362 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2363 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2364 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2365 generation, 64); 2366 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2367 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2368 struct btrfs_super_block, sys_chunk_array_size, 32); 2369 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2370 struct btrfs_super_block, chunk_root_generation, 64); 2371 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2372 root_level, 8); 2373 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2374 chunk_root, 64); 2375 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2376 chunk_root_level, 8); 2377 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2378 log_root, 64); 2379 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2380 log_root_transid, 64); 2381 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2382 log_root_level, 8); 2383 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2384 total_bytes, 64); 2385 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2386 bytes_used, 64); 2387 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2388 sectorsize, 32); 2389 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2390 nodesize, 32); 2391 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2392 stripesize, 32); 2393 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2394 root_dir_objectid, 64); 2395 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2396 num_devices, 64); 2397 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2398 compat_flags, 64); 2399 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2400 compat_ro_flags, 64); 2401 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2402 incompat_flags, 64); 2403 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2404 csum_type, 16); 2405 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2406 cache_generation, 64); 2407 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2408 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2409 uuid_tree_generation, 64); 2410 2411 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2412 const char *btrfs_super_csum_name(u16 csum_type); 2413 const char *btrfs_super_csum_driver(u16 csum_type); 2414 size_t __attribute_const__ btrfs_get_num_csums(void); 2415 2416 2417 /* 2418 * The leaf data grows from end-to-front in the node. 2419 * this returns the address of the start of the last item, 2420 * which is the stop of the leaf data stack 2421 */ 2422 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2423 { 2424 u32 nr = btrfs_header_nritems(leaf); 2425 2426 if (nr == 0) 2427 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2428 return btrfs_item_offset_nr(leaf, nr - 1); 2429 } 2430 2431 /* struct btrfs_file_extent_item */ 2432 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2433 type, 8); 2434 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2435 struct btrfs_file_extent_item, disk_bytenr, 64); 2436 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2437 struct btrfs_file_extent_item, offset, 64); 2438 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2439 struct btrfs_file_extent_item, generation, 64); 2440 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2441 struct btrfs_file_extent_item, num_bytes, 64); 2442 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2443 struct btrfs_file_extent_item, ram_bytes, 64); 2444 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2445 struct btrfs_file_extent_item, disk_num_bytes, 64); 2446 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2447 struct btrfs_file_extent_item, compression, 8); 2448 2449 static inline unsigned long 2450 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2451 { 2452 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2453 } 2454 2455 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2456 { 2457 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2458 } 2459 2460 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2461 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2462 disk_bytenr, 64); 2463 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2464 generation, 64); 2465 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2466 disk_num_bytes, 64); 2467 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2468 offset, 64); 2469 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2470 num_bytes, 64); 2471 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2472 ram_bytes, 64); 2473 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2474 compression, 8); 2475 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2476 encryption, 8); 2477 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2478 other_encoding, 16); 2479 2480 /* 2481 * this returns the number of bytes used by the item on disk, minus the 2482 * size of any extent headers. If a file is compressed on disk, this is 2483 * the compressed size 2484 */ 2485 static inline u32 btrfs_file_extent_inline_item_len( 2486 const struct extent_buffer *eb, 2487 struct btrfs_item *e) 2488 { 2489 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2490 } 2491 2492 /* btrfs_qgroup_status_item */ 2493 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2494 generation, 64); 2495 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2496 version, 64); 2497 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2498 flags, 64); 2499 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2500 rescan, 64); 2501 2502 /* btrfs_qgroup_info_item */ 2503 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2504 generation, 64); 2505 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2506 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2507 rfer_cmpr, 64); 2508 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2509 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2510 excl_cmpr, 64); 2511 2512 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2513 struct btrfs_qgroup_info_item, generation, 64); 2514 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2515 rfer, 64); 2516 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2517 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2518 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2519 excl, 64); 2520 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2521 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2522 2523 /* btrfs_qgroup_limit_item */ 2524 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2525 flags, 64); 2526 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2527 max_rfer, 64); 2528 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2529 max_excl, 64); 2530 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2531 rsv_rfer, 64); 2532 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2533 rsv_excl, 64); 2534 2535 /* btrfs_dev_replace_item */ 2536 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2537 struct btrfs_dev_replace_item, src_devid, 64); 2538 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2539 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2540 64); 2541 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2542 replace_state, 64); 2543 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2544 time_started, 64); 2545 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2546 time_stopped, 64); 2547 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2548 num_write_errors, 64); 2549 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2550 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2551 64); 2552 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2553 cursor_left, 64); 2554 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2555 cursor_right, 64); 2556 2557 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2558 struct btrfs_dev_replace_item, src_devid, 64); 2559 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2560 struct btrfs_dev_replace_item, 2561 cont_reading_from_srcdev_mode, 64); 2562 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2563 struct btrfs_dev_replace_item, replace_state, 64); 2564 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2565 struct btrfs_dev_replace_item, time_started, 64); 2566 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2567 struct btrfs_dev_replace_item, time_stopped, 64); 2568 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2569 struct btrfs_dev_replace_item, num_write_errors, 64); 2570 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2571 struct btrfs_dev_replace_item, 2572 num_uncorrectable_read_errors, 64); 2573 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2574 struct btrfs_dev_replace_item, cursor_left, 64); 2575 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2576 struct btrfs_dev_replace_item, cursor_right, 64); 2577 2578 /* helper function to cast into the data area of the leaf. */ 2579 #define btrfs_item_ptr(leaf, slot, type) \ 2580 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2581 btrfs_item_offset_nr(leaf, slot))) 2582 2583 #define btrfs_item_ptr_offset(leaf, slot) \ 2584 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2585 btrfs_item_offset_nr(leaf, slot))) 2586 2587 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2588 { 2589 return crc32c(crc, address, length); 2590 } 2591 2592 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2593 { 2594 put_unaligned_le32(~crc, result); 2595 } 2596 2597 static inline u64 btrfs_name_hash(const char *name, int len) 2598 { 2599 return crc32c((u32)~1, name, len); 2600 } 2601 2602 /* 2603 * Figure the key offset of an extended inode ref 2604 */ 2605 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2606 int len) 2607 { 2608 return (u64) crc32c(parent_objectid, name, len); 2609 } 2610 2611 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2612 { 2613 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2614 } 2615 2616 /* extent-tree.c */ 2617 2618 enum btrfs_inline_ref_type { 2619 BTRFS_REF_TYPE_INVALID, 2620 BTRFS_REF_TYPE_BLOCK, 2621 BTRFS_REF_TYPE_DATA, 2622 BTRFS_REF_TYPE_ANY, 2623 }; 2624 2625 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2626 struct btrfs_extent_inline_ref *iref, 2627 enum btrfs_inline_ref_type is_data); 2628 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2629 2630 /* 2631 * Take the number of bytes to be checksummmed and figure out how many leaves 2632 * it would require to store the csums for that many bytes. 2633 */ 2634 static inline u64 btrfs_csum_bytes_to_leaves( 2635 const struct btrfs_fs_info *fs_info, u64 csum_bytes) 2636 { 2637 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits; 2638 2639 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf); 2640 } 2641 2642 /* 2643 * Use this if we would be adding new items, as we could split nodes as we cow 2644 * down the tree. 2645 */ 2646 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2647 unsigned num_items) 2648 { 2649 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2650 } 2651 2652 /* 2653 * Doing a truncate or a modification won't result in new nodes or leaves, just 2654 * what we need for COW. 2655 */ 2656 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2657 unsigned num_items) 2658 { 2659 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2660 } 2661 2662 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2663 u64 start, u64 num_bytes); 2664 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2665 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2666 unsigned long count); 2667 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2668 struct btrfs_delayed_ref_root *delayed_refs, 2669 struct btrfs_delayed_ref_head *head); 2670 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2671 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2672 struct btrfs_fs_info *fs_info, u64 bytenr, 2673 u64 offset, int metadata, u64 *refs, u64 *flags); 2674 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2675 int reserved); 2676 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2677 u64 bytenr, u64 num_bytes); 2678 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2679 int btrfs_cross_ref_exist(struct btrfs_root *root, 2680 u64 objectid, u64 offset, u64 bytenr, bool strict); 2681 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2682 struct btrfs_root *root, 2683 u64 parent, u64 root_objectid, 2684 const struct btrfs_disk_key *key, 2685 int level, u64 hint, 2686 u64 empty_size, 2687 enum btrfs_lock_nesting nest); 2688 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2689 struct btrfs_root *root, 2690 struct extent_buffer *buf, 2691 u64 parent, int last_ref); 2692 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2693 struct btrfs_root *root, u64 owner, 2694 u64 offset, u64 ram_bytes, 2695 struct btrfs_key *ins); 2696 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2697 u64 root_objectid, u64 owner, u64 offset, 2698 struct btrfs_key *ins); 2699 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2700 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2701 struct btrfs_key *ins, int is_data, int delalloc); 2702 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2703 struct extent_buffer *buf, int full_backref); 2704 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2705 struct extent_buffer *buf, int full_backref); 2706 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2707 struct extent_buffer *eb, u64 flags, 2708 int level, int is_data); 2709 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2710 2711 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2712 u64 start, u64 len, int delalloc); 2713 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2714 u64 len); 2715 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2716 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2717 struct btrfs_ref *generic_ref); 2718 2719 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2720 2721 /* 2722 * Different levels for to flush space when doing space reservations. 2723 * 2724 * The higher the level, the more methods we try to reclaim space. 2725 */ 2726 enum btrfs_reserve_flush_enum { 2727 /* If we are in the transaction, we can't flush anything.*/ 2728 BTRFS_RESERVE_NO_FLUSH, 2729 2730 /* 2731 * Flush space by: 2732 * - Running delayed inode items 2733 * - Allocating a new chunk 2734 */ 2735 BTRFS_RESERVE_FLUSH_LIMIT, 2736 2737 /* 2738 * Flush space by: 2739 * - Running delayed inode items 2740 * - Running delayed refs 2741 * - Running delalloc and waiting for ordered extents 2742 * - Allocating a new chunk 2743 */ 2744 BTRFS_RESERVE_FLUSH_EVICT, 2745 2746 /* 2747 * Flush space by above mentioned methods and by: 2748 * - Running delayed iputs 2749 * - Commiting transaction 2750 * 2751 * Can be interruped by fatal signal. 2752 */ 2753 BTRFS_RESERVE_FLUSH_DATA, 2754 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2755 BTRFS_RESERVE_FLUSH_ALL, 2756 2757 /* 2758 * Pretty much the same as FLUSH_ALL, but can also steal space from 2759 * global rsv. 2760 * 2761 * Can be interruped by fatal signal. 2762 */ 2763 BTRFS_RESERVE_FLUSH_ALL_STEAL, 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 ALLOC_CHUNK_FORCE = 8, 2775 RUN_DELAYED_IPUTS = 9, 2776 COMMIT_TRANS = 10, 2777 FORCE_COMMIT_TRANS = 11, 2778 }; 2779 2780 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2781 struct btrfs_block_rsv *rsv, 2782 int nitems, bool use_global_rsv); 2783 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2784 struct btrfs_block_rsv *rsv); 2785 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2786 2787 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2788 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2789 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2790 u64 start, u64 end); 2791 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2792 u64 num_bytes, u64 *actual_bytes); 2793 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2794 2795 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2796 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2797 struct btrfs_fs_info *fs_info); 2798 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2799 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2800 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2801 2802 /* ctree.c */ 2803 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2804 int *slot); 2805 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2806 int btrfs_previous_item(struct btrfs_root *root, 2807 struct btrfs_path *path, u64 min_objectid, 2808 int type); 2809 int btrfs_previous_extent_item(struct btrfs_root *root, 2810 struct btrfs_path *path, u64 min_objectid); 2811 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2812 struct btrfs_path *path, 2813 const struct btrfs_key *new_key); 2814 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2815 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2816 struct btrfs_key *key, int lowest_level, 2817 u64 min_trans); 2818 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2819 struct btrfs_path *path, 2820 u64 min_trans); 2821 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2822 int slot); 2823 2824 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2825 struct btrfs_root *root, struct extent_buffer *buf, 2826 struct extent_buffer *parent, int parent_slot, 2827 struct extent_buffer **cow_ret, 2828 enum btrfs_lock_nesting nest); 2829 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2830 struct btrfs_root *root, 2831 struct extent_buffer *buf, 2832 struct extent_buffer **cow_ret, u64 new_root_objectid); 2833 int btrfs_block_can_be_shared(struct btrfs_root *root, 2834 struct extent_buffer *buf); 2835 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2836 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2837 int btrfs_split_item(struct btrfs_trans_handle *trans, 2838 struct btrfs_root *root, 2839 struct btrfs_path *path, 2840 const struct btrfs_key *new_key, 2841 unsigned long split_offset); 2842 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2843 struct btrfs_root *root, 2844 struct btrfs_path *path, 2845 const struct btrfs_key *new_key); 2846 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2847 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2848 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2849 const struct btrfs_key *key, struct btrfs_path *p, 2850 int ins_len, int cow); 2851 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2852 struct btrfs_path *p, u64 time_seq); 2853 int btrfs_search_slot_for_read(struct btrfs_root *root, 2854 const struct btrfs_key *key, 2855 struct btrfs_path *p, int find_higher, 2856 int return_any); 2857 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2858 struct btrfs_root *root, struct extent_buffer *parent, 2859 int start_slot, u64 *last_ret, 2860 struct btrfs_key *progress); 2861 void btrfs_release_path(struct btrfs_path *p); 2862 struct btrfs_path *btrfs_alloc_path(void); 2863 void btrfs_free_path(struct btrfs_path *p); 2864 2865 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2866 struct btrfs_path *path, int slot, int nr); 2867 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2868 struct btrfs_root *root, 2869 struct btrfs_path *path) 2870 { 2871 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2872 } 2873 2874 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2875 const struct btrfs_key *cpu_key, u32 *data_size, 2876 int nr); 2877 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2878 const struct btrfs_key *key, void *data, u32 data_size); 2879 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2880 struct btrfs_root *root, 2881 struct btrfs_path *path, 2882 const struct btrfs_key *cpu_key, u32 *data_size, 2883 int nr); 2884 2885 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2886 struct btrfs_root *root, 2887 struct btrfs_path *path, 2888 const struct btrfs_key *key, 2889 u32 data_size) 2890 { 2891 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2892 } 2893 2894 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2895 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2896 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2897 u64 time_seq); 2898 static inline int btrfs_next_old_item(struct btrfs_root *root, 2899 struct btrfs_path *p, u64 time_seq) 2900 { 2901 ++p->slots[0]; 2902 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2903 return btrfs_next_old_leaf(root, p, time_seq); 2904 return 0; 2905 } 2906 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2907 { 2908 return btrfs_next_old_item(root, p, 0); 2909 } 2910 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2911 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2912 int for_reloc); 2913 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2914 struct btrfs_root *root, 2915 struct extent_buffer *node, 2916 struct extent_buffer *parent); 2917 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2918 { 2919 /* 2920 * Do it this way so we only ever do one test_bit in the normal case. 2921 */ 2922 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2923 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2924 return 2; 2925 return 1; 2926 } 2927 return 0; 2928 } 2929 2930 /* 2931 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2932 * anything except sleeping. This function is used to check the status of 2933 * the fs. 2934 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount, 2935 * since setting and checking for SB_RDONLY in the superblock's flags is not 2936 * atomic. 2937 */ 2938 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2939 { 2940 return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) || 2941 btrfs_fs_closing(fs_info); 2942 } 2943 2944 static inline void btrfs_set_sb_rdonly(struct super_block *sb) 2945 { 2946 sb->s_flags |= SB_RDONLY; 2947 set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state); 2948 } 2949 2950 static inline void btrfs_clear_sb_rdonly(struct super_block *sb) 2951 { 2952 sb->s_flags &= ~SB_RDONLY; 2953 clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state); 2954 } 2955 2956 /* root-item.c */ 2957 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2958 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2959 int name_len); 2960 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2961 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2962 int name_len); 2963 int btrfs_del_root(struct btrfs_trans_handle *trans, 2964 const struct btrfs_key *key); 2965 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2966 const struct btrfs_key *key, 2967 struct btrfs_root_item *item); 2968 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2969 struct btrfs_root *root, 2970 struct btrfs_key *key, 2971 struct btrfs_root_item *item); 2972 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2973 struct btrfs_path *path, struct btrfs_root_item *root_item, 2974 struct btrfs_key *root_key); 2975 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2976 void btrfs_set_root_node(struct btrfs_root_item *item, 2977 struct extent_buffer *node); 2978 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2979 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2980 struct btrfs_root *root); 2981 2982 /* uuid-tree.c */ 2983 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2984 u64 subid); 2985 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2986 u64 subid); 2987 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2988 2989 /* dir-item.c */ 2990 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2991 const char *name, int name_len); 2992 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2993 int name_len, struct btrfs_inode *dir, 2994 struct btrfs_key *location, u8 type, u64 index); 2995 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2996 struct btrfs_root *root, 2997 struct btrfs_path *path, u64 dir, 2998 const char *name, int name_len, 2999 int mod); 3000 struct btrfs_dir_item * 3001 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3002 struct btrfs_root *root, 3003 struct btrfs_path *path, u64 dir, 3004 u64 objectid, const char *name, int name_len, 3005 int mod); 3006 struct btrfs_dir_item * 3007 btrfs_search_dir_index_item(struct btrfs_root *root, 3008 struct btrfs_path *path, u64 dirid, 3009 const char *name, int name_len); 3010 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3011 struct btrfs_root *root, 3012 struct btrfs_path *path, 3013 struct btrfs_dir_item *di); 3014 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3015 struct btrfs_root *root, 3016 struct btrfs_path *path, u64 objectid, 3017 const char *name, u16 name_len, 3018 const void *data, u16 data_len); 3019 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3020 struct btrfs_root *root, 3021 struct btrfs_path *path, u64 dir, 3022 const char *name, u16 name_len, 3023 int mod); 3024 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3025 struct btrfs_path *path, 3026 const char *name, 3027 int name_len); 3028 3029 /* orphan.c */ 3030 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3031 struct btrfs_root *root, u64 offset); 3032 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3033 struct btrfs_root *root, u64 offset); 3034 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3035 3036 /* inode-item.c */ 3037 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3038 struct btrfs_root *root, 3039 const char *name, int name_len, 3040 u64 inode_objectid, u64 ref_objectid, u64 index); 3041 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3042 struct btrfs_root *root, 3043 const char *name, int name_len, 3044 u64 inode_objectid, u64 ref_objectid, u64 *index); 3045 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3046 struct btrfs_root *root, 3047 struct btrfs_path *path, u64 objectid); 3048 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3049 *root, struct btrfs_path *path, 3050 struct btrfs_key *location, int mod); 3051 3052 struct btrfs_inode_extref * 3053 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3054 struct btrfs_root *root, 3055 struct btrfs_path *path, 3056 const char *name, int name_len, 3057 u64 inode_objectid, u64 ref_objectid, int ins_len, 3058 int cow); 3059 3060 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 3061 int slot, const char *name, 3062 int name_len); 3063 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 3064 struct extent_buffer *leaf, int slot, u64 ref_objectid, 3065 const char *name, int name_len); 3066 /* file-item.c */ 3067 struct btrfs_dio_private; 3068 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3069 struct btrfs_root *root, u64 bytenr, u64 len); 3070 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst); 3071 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3072 struct btrfs_root *root, 3073 u64 objectid, u64 pos, 3074 u64 disk_offset, u64 disk_num_bytes, 3075 u64 num_bytes, u64 offset, u64 ram_bytes, 3076 u8 compression, u8 encryption, u16 other_encoding); 3077 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3078 struct btrfs_root *root, 3079 struct btrfs_path *path, u64 objectid, 3080 u64 bytenr, int mod); 3081 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3082 struct btrfs_root *root, 3083 struct btrfs_ordered_sum *sums); 3084 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 3085 u64 file_start, int contig); 3086 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3087 struct list_head *list, int search_commit); 3088 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3089 const struct btrfs_path *path, 3090 struct btrfs_file_extent_item *fi, 3091 const bool new_inline, 3092 struct extent_map *em); 3093 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 3094 u64 len); 3095 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 3096 u64 len); 3097 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); 3098 u64 btrfs_file_extent_end(const struct btrfs_path *path); 3099 3100 /* inode.c */ 3101 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 3102 int mirror_num, unsigned long bio_flags); 3103 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset, 3104 struct page *page, u64 start, u64 end); 3105 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3106 u64 start, u64 len); 3107 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3108 u64 *orig_start, u64 *orig_block_len, 3109 u64 *ram_bytes, bool strict); 3110 3111 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3112 struct btrfs_inode *inode); 3113 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3114 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3115 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3116 struct btrfs_root *root, 3117 struct btrfs_inode *dir, struct btrfs_inode *inode, 3118 const char *name, int name_len); 3119 int btrfs_add_link(struct btrfs_trans_handle *trans, 3120 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3121 const char *name, int name_len, int add_backref, u64 index); 3122 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3123 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, 3124 int front); 3125 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3126 struct btrfs_root *root, 3127 struct btrfs_inode *inode, u64 new_size, 3128 u32 min_type); 3129 3130 int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context); 3131 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr, 3132 bool in_reclaim_context); 3133 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3134 unsigned int extra_bits, 3135 struct extent_state **cached_state); 3136 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3137 struct btrfs_root *new_root, 3138 struct btrfs_root *parent_root); 3139 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3140 unsigned *bits); 3141 void btrfs_clear_delalloc_extent(struct inode *inode, 3142 struct extent_state *state, unsigned *bits); 3143 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3144 struct extent_state *other); 3145 void btrfs_split_delalloc_extent(struct inode *inode, 3146 struct extent_state *orig, u64 split); 3147 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3148 unsigned long bio_flags); 3149 bool btrfs_bio_fits_in_ordered_extent(struct page *page, struct bio *bio, 3150 unsigned int size); 3151 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3152 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3153 int btrfs_readpage(struct file *file, struct page *page); 3154 void btrfs_evict_inode(struct inode *inode); 3155 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3156 struct inode *btrfs_alloc_inode(struct super_block *sb); 3157 void btrfs_destroy_inode(struct inode *inode); 3158 void btrfs_free_inode(struct inode *inode); 3159 int btrfs_drop_inode(struct inode *inode); 3160 int __init btrfs_init_cachep(void); 3161 void __cold btrfs_destroy_cachep(void); 3162 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3163 struct btrfs_root *root, struct btrfs_path *path); 3164 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3165 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3166 struct page *page, size_t pg_offset, 3167 u64 start, u64 end); 3168 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3169 struct btrfs_root *root, struct btrfs_inode *inode); 3170 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3171 struct btrfs_root *root, struct btrfs_inode *inode); 3172 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3173 struct btrfs_inode *inode); 3174 int btrfs_orphan_cleanup(struct btrfs_root *root); 3175 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); 3176 void btrfs_add_delayed_iput(struct inode *inode); 3177 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3178 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3179 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3180 u64 start, u64 num_bytes, u64 min_size, 3181 loff_t actual_len, u64 *alloc_hint); 3182 int btrfs_prealloc_file_range_trans(struct inode *inode, 3183 struct btrfs_trans_handle *trans, int mode, 3184 u64 start, u64 num_bytes, u64 min_size, 3185 loff_t actual_len, u64 *alloc_hint); 3186 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3187 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3188 struct writeback_control *wbc); 3189 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3190 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3191 u64 end, int uptodate); 3192 extern const struct dentry_operations btrfs_dentry_operations; 3193 extern const struct iomap_ops btrfs_dio_iomap_ops; 3194 extern const struct iomap_dio_ops btrfs_dio_ops; 3195 3196 /* Inode locking type flags, by default the exclusive lock is taken */ 3197 #define BTRFS_ILOCK_SHARED (1U << 0) 3198 #define BTRFS_ILOCK_TRY (1U << 1) 3199 #define BTRFS_ILOCK_MMAP (1U << 2) 3200 3201 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); 3202 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); 3203 void btrfs_update_inode_bytes(struct btrfs_inode *inode, 3204 const u64 add_bytes, 3205 const u64 del_bytes); 3206 3207 /* ioctl.c */ 3208 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3209 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3210 int btrfs_fileattr_get(struct dentry *dentry, struct fileattr *fa); 3211 int btrfs_fileattr_set(struct user_namespace *mnt_userns, 3212 struct dentry *dentry, struct fileattr *fa); 3213 int btrfs_ioctl_get_supported_features(void __user *arg); 3214 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3215 int __pure btrfs_is_empty_uuid(u8 *uuid); 3216 int btrfs_defrag_file(struct inode *inode, struct file *file, 3217 struct btrfs_ioctl_defrag_range_args *range, 3218 u64 newer_than, unsigned long max_pages); 3219 void btrfs_get_block_group_info(struct list_head *groups_list, 3220 struct btrfs_ioctl_space_info *space); 3221 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3222 struct btrfs_ioctl_balance_args *bargs); 3223 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3224 enum btrfs_exclusive_operation type); 3225 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3226 3227 /* file.c */ 3228 int __init btrfs_auto_defrag_init(void); 3229 void __cold btrfs_auto_defrag_exit(void); 3230 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3231 struct btrfs_inode *inode); 3232 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3233 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3234 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3235 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3236 int skip_pinned); 3237 extern const struct file_operations btrfs_file_operations; 3238 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3239 struct btrfs_root *root, struct btrfs_inode *inode, 3240 struct btrfs_drop_extents_args *args); 3241 int btrfs_replace_file_extents(struct btrfs_inode *inode, 3242 struct btrfs_path *path, const u64 start, 3243 const u64 end, 3244 struct btrfs_replace_extent_info *extent_info, 3245 struct btrfs_trans_handle **trans_out); 3246 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3247 struct btrfs_inode *inode, u64 start, u64 end); 3248 int btrfs_release_file(struct inode *inode, struct file *file); 3249 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3250 size_t num_pages, loff_t pos, size_t write_bytes, 3251 struct extent_state **cached, bool noreserve); 3252 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3253 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3254 size_t *write_bytes); 3255 void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3256 3257 /* tree-defrag.c */ 3258 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3259 struct btrfs_root *root); 3260 3261 /* super.c */ 3262 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3263 unsigned long new_flags); 3264 int btrfs_sync_fs(struct super_block *sb, int wait); 3265 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3266 u64 subvol_objectid); 3267 3268 static inline __printf(2, 3) __cold 3269 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3270 { 3271 } 3272 3273 #ifdef CONFIG_PRINTK 3274 __printf(2, 3) 3275 __cold 3276 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3277 #else 3278 #define btrfs_printk(fs_info, fmt, args...) \ 3279 btrfs_no_printk(fs_info, fmt, ##args) 3280 #endif 3281 3282 #define btrfs_emerg(fs_info, fmt, args...) \ 3283 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3284 #define btrfs_alert(fs_info, fmt, args...) \ 3285 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3286 #define btrfs_crit(fs_info, fmt, args...) \ 3287 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3288 #define btrfs_err(fs_info, fmt, args...) \ 3289 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3290 #define btrfs_warn(fs_info, fmt, args...) \ 3291 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3292 #define btrfs_notice(fs_info, fmt, args...) \ 3293 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3294 #define btrfs_info(fs_info, fmt, args...) \ 3295 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3296 3297 /* 3298 * Wrappers that use printk_in_rcu 3299 */ 3300 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3301 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3302 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3303 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3304 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3305 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3306 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3307 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3308 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3309 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3310 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3311 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3312 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3313 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3314 3315 /* 3316 * Wrappers that use a ratelimited printk_in_rcu 3317 */ 3318 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3319 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3320 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3321 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3322 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3323 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3324 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3326 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3327 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3328 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3329 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3330 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3331 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3332 3333 /* 3334 * Wrappers that use a ratelimited printk 3335 */ 3336 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3337 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3338 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3339 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3340 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3341 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3342 #define btrfs_err_rl(fs_info, fmt, args...) \ 3343 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3344 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3345 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3346 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3347 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3348 #define btrfs_info_rl(fs_info, fmt, args...) \ 3349 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3350 3351 #if defined(CONFIG_DYNAMIC_DEBUG) 3352 #define btrfs_debug(fs_info, fmt, args...) \ 3353 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3354 fs_info, KERN_DEBUG fmt, ##args) 3355 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3356 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3357 fs_info, KERN_DEBUG fmt, ##args) 3358 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3359 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3360 fs_info, KERN_DEBUG fmt, ##args) 3361 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3362 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3363 fs_info, KERN_DEBUG fmt, ##args) 3364 #elif defined(DEBUG) 3365 #define btrfs_debug(fs_info, fmt, args...) \ 3366 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3367 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3368 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3369 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3370 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3371 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3372 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3373 #else 3374 #define btrfs_debug(fs_info, fmt, args...) \ 3375 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3376 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3377 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3378 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3379 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3380 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3381 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3382 #endif 3383 3384 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3385 do { \ 3386 rcu_read_lock(); \ 3387 btrfs_printk(fs_info, fmt, ##args); \ 3388 rcu_read_unlock(); \ 3389 } while (0) 3390 3391 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3392 do { \ 3393 rcu_read_lock(); \ 3394 btrfs_no_printk(fs_info, fmt, ##args); \ 3395 rcu_read_unlock(); \ 3396 } while (0) 3397 3398 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3399 do { \ 3400 static DEFINE_RATELIMIT_STATE(_rs, \ 3401 DEFAULT_RATELIMIT_INTERVAL, \ 3402 DEFAULT_RATELIMIT_BURST); \ 3403 if (__ratelimit(&_rs)) \ 3404 btrfs_printk(fs_info, fmt, ##args); \ 3405 } while (0) 3406 3407 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3408 do { \ 3409 rcu_read_lock(); \ 3410 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3411 rcu_read_unlock(); \ 3412 } while (0) 3413 3414 #ifdef CONFIG_BTRFS_ASSERT 3415 __cold __noreturn 3416 static inline void assertfail(const char *expr, const char *file, int line) 3417 { 3418 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3419 BUG(); 3420 } 3421 3422 #define ASSERT(expr) \ 3423 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3424 3425 #else 3426 static inline void assertfail(const char *expr, const char* file, int line) { } 3427 #define ASSERT(expr) (void)(expr) 3428 #endif 3429 3430 #if BITS_PER_LONG == 32 3431 #define BTRFS_32BIT_MAX_FILE_SIZE (((u64)ULONG_MAX + 1) << PAGE_SHIFT) 3432 /* 3433 * The warning threshold is 5/8th of the MAX_LFS_FILESIZE that limits the logical 3434 * addresses of extents. 3435 * 3436 * For 4K page size it's about 10T, for 64K it's 160T. 3437 */ 3438 #define BTRFS_32BIT_EARLY_WARN_THRESHOLD (BTRFS_32BIT_MAX_FILE_SIZE * 5 / 8) 3439 void btrfs_warn_32bit_limit(struct btrfs_fs_info *fs_info); 3440 void btrfs_err_32bit_limit(struct btrfs_fs_info *fs_info); 3441 #endif 3442 3443 /* 3444 * Get the correct offset inside the page of extent buffer. 3445 * 3446 * @eb: target extent buffer 3447 * @start: offset inside the extent buffer 3448 * 3449 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases. 3450 */ 3451 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb, 3452 unsigned long offset) 3453 { 3454 /* 3455 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned 3456 * to PAGE_SIZE, thus adding it won't cause any difference. 3457 * 3458 * For sectorsize < PAGE_SIZE, we must only read the data that belongs 3459 * to the eb, thus we have to take the eb->start into consideration. 3460 */ 3461 return offset_in_page(offset + eb->start); 3462 } 3463 3464 static inline unsigned long get_eb_page_index(unsigned long offset) 3465 { 3466 /* 3467 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough. 3468 * 3469 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE, 3470 * and have ensured that all tree blocks are contained in one page, 3471 * thus we always get index == 0. 3472 */ 3473 return offset >> PAGE_SHIFT; 3474 } 3475 3476 /* 3477 * Use that for functions that are conditionally exported for sanity tests but 3478 * otherwise static 3479 */ 3480 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3481 #define EXPORT_FOR_TESTS static 3482 #else 3483 #define EXPORT_FOR_TESTS 3484 #endif 3485 3486 __cold 3487 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3488 { 3489 btrfs_err(fs_info, 3490 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3491 } 3492 3493 __printf(5, 6) 3494 __cold 3495 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3496 unsigned int line, int errno, const char *fmt, ...); 3497 3498 const char * __attribute_const__ btrfs_decode_error(int errno); 3499 3500 __cold 3501 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3502 const char *function, 3503 unsigned int line, int errno); 3504 3505 /* 3506 * Call btrfs_abort_transaction as early as possible when an error condition is 3507 * detected, that way the exact line number is reported. 3508 */ 3509 #define btrfs_abort_transaction(trans, errno) \ 3510 do { \ 3511 /* Report first abort since mount */ \ 3512 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3513 &((trans)->fs_info->fs_state))) { \ 3514 if ((errno) != -EIO && (errno) != -EROFS) { \ 3515 WARN(1, KERN_DEBUG \ 3516 "BTRFS: Transaction aborted (error %d)\n", \ 3517 (errno)); \ 3518 } else { \ 3519 btrfs_debug((trans)->fs_info, \ 3520 "Transaction aborted (error %d)", \ 3521 (errno)); \ 3522 } \ 3523 } \ 3524 __btrfs_abort_transaction((trans), __func__, \ 3525 __LINE__, (errno)); \ 3526 } while (0) 3527 3528 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3529 do { \ 3530 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3531 (errno), fmt, ##args); \ 3532 } while (0) 3533 3534 __printf(5, 6) 3535 __cold 3536 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3537 unsigned int line, int errno, const char *fmt, ...); 3538 /* 3539 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3540 * will panic(). Otherwise we BUG() here. 3541 */ 3542 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3543 do { \ 3544 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3545 BUG(); \ 3546 } while (0) 3547 3548 3549 /* compatibility and incompatibility defines */ 3550 3551 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3552 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3553 #opt) 3554 3555 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3556 u64 flag, const char* name) 3557 { 3558 struct btrfs_super_block *disk_super; 3559 u64 features; 3560 3561 disk_super = fs_info->super_copy; 3562 features = btrfs_super_incompat_flags(disk_super); 3563 if (!(features & flag)) { 3564 spin_lock(&fs_info->super_lock); 3565 features = btrfs_super_incompat_flags(disk_super); 3566 if (!(features & flag)) { 3567 features |= flag; 3568 btrfs_set_super_incompat_flags(disk_super, features); 3569 btrfs_info(fs_info, 3570 "setting incompat feature flag for %s (0x%llx)", 3571 name, flag); 3572 } 3573 spin_unlock(&fs_info->super_lock); 3574 } 3575 } 3576 3577 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3578 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3579 #opt) 3580 3581 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3582 u64 flag, const char* name) 3583 { 3584 struct btrfs_super_block *disk_super; 3585 u64 features; 3586 3587 disk_super = fs_info->super_copy; 3588 features = btrfs_super_incompat_flags(disk_super); 3589 if (features & flag) { 3590 spin_lock(&fs_info->super_lock); 3591 features = btrfs_super_incompat_flags(disk_super); 3592 if (features & flag) { 3593 features &= ~flag; 3594 btrfs_set_super_incompat_flags(disk_super, features); 3595 btrfs_info(fs_info, 3596 "clearing incompat feature flag for %s (0x%llx)", 3597 name, flag); 3598 } 3599 spin_unlock(&fs_info->super_lock); 3600 } 3601 } 3602 3603 #define btrfs_fs_incompat(fs_info, opt) \ 3604 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3605 3606 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3607 { 3608 struct btrfs_super_block *disk_super; 3609 disk_super = fs_info->super_copy; 3610 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3611 } 3612 3613 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3614 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3615 #opt) 3616 3617 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3618 u64 flag, const char *name) 3619 { 3620 struct btrfs_super_block *disk_super; 3621 u64 features; 3622 3623 disk_super = fs_info->super_copy; 3624 features = btrfs_super_compat_ro_flags(disk_super); 3625 if (!(features & flag)) { 3626 spin_lock(&fs_info->super_lock); 3627 features = btrfs_super_compat_ro_flags(disk_super); 3628 if (!(features & flag)) { 3629 features |= flag; 3630 btrfs_set_super_compat_ro_flags(disk_super, features); 3631 btrfs_info(fs_info, 3632 "setting compat-ro feature flag for %s (0x%llx)", 3633 name, flag); 3634 } 3635 spin_unlock(&fs_info->super_lock); 3636 } 3637 } 3638 3639 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3640 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3641 #opt) 3642 3643 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3644 u64 flag, const char *name) 3645 { 3646 struct btrfs_super_block *disk_super; 3647 u64 features; 3648 3649 disk_super = fs_info->super_copy; 3650 features = btrfs_super_compat_ro_flags(disk_super); 3651 if (features & flag) { 3652 spin_lock(&fs_info->super_lock); 3653 features = btrfs_super_compat_ro_flags(disk_super); 3654 if (features & flag) { 3655 features &= ~flag; 3656 btrfs_set_super_compat_ro_flags(disk_super, features); 3657 btrfs_info(fs_info, 3658 "clearing compat-ro feature flag for %s (0x%llx)", 3659 name, flag); 3660 } 3661 spin_unlock(&fs_info->super_lock); 3662 } 3663 } 3664 3665 #define btrfs_fs_compat_ro(fs_info, opt) \ 3666 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3667 3668 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3669 { 3670 struct btrfs_super_block *disk_super; 3671 disk_super = fs_info->super_copy; 3672 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3673 } 3674 3675 /* acl.c */ 3676 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3677 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3678 int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode, 3679 struct posix_acl *acl, int type); 3680 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3681 struct inode *inode, struct inode *dir); 3682 #else 3683 #define btrfs_get_acl NULL 3684 #define btrfs_set_acl NULL 3685 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3686 struct inode *inode, struct inode *dir) 3687 { 3688 return 0; 3689 } 3690 #endif 3691 3692 /* relocation.c */ 3693 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3694 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3695 struct btrfs_root *root); 3696 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3697 struct btrfs_root *root); 3698 int btrfs_recover_relocation(struct btrfs_root *root); 3699 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3700 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3701 struct btrfs_root *root, struct extent_buffer *buf, 3702 struct extent_buffer *cow); 3703 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3704 u64 *bytes_to_reserve); 3705 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3706 struct btrfs_pending_snapshot *pending); 3707 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3708 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3709 u64 bytenr); 3710 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3711 3712 /* scrub.c */ 3713 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3714 u64 end, struct btrfs_scrub_progress *progress, 3715 int readonly, int is_dev_replace); 3716 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3717 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3718 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3719 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3720 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3721 struct btrfs_scrub_progress *progress); 3722 static inline void btrfs_init_full_stripe_locks_tree( 3723 struct btrfs_full_stripe_locks_tree *locks_root) 3724 { 3725 locks_root->root = RB_ROOT; 3726 mutex_init(&locks_root->lock); 3727 } 3728 3729 /* dev-replace.c */ 3730 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3731 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3732 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3733 3734 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3735 { 3736 btrfs_bio_counter_sub(fs_info, 1); 3737 } 3738 3739 /* reada.c */ 3740 struct reada_control { 3741 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3742 struct btrfs_key key_start; 3743 struct btrfs_key key_end; /* exclusive */ 3744 atomic_t elems; 3745 struct kref refcnt; 3746 wait_queue_head_t wait; 3747 }; 3748 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3749 struct btrfs_key *start, struct btrfs_key *end); 3750 int btrfs_reada_wait(void *handle); 3751 void btrfs_reada_detach(void *handle); 3752 int btree_readahead_hook(struct extent_buffer *eb, int err); 3753 void btrfs_reada_remove_dev(struct btrfs_device *dev); 3754 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3755 3756 static inline int is_fstree(u64 rootid) 3757 { 3758 if (rootid == BTRFS_FS_TREE_OBJECTID || 3759 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3760 !btrfs_qgroup_level(rootid))) 3761 return 1; 3762 return 0; 3763 } 3764 3765 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3766 { 3767 return signal_pending(current); 3768 } 3769 3770 /* Sanity test specific functions */ 3771 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3772 void btrfs_test_destroy_inode(struct inode *inode); 3773 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3774 { 3775 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3776 } 3777 #else 3778 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3779 { 3780 return 0; 3781 } 3782 #endif 3783 3784 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info) 3785 { 3786 return fs_info->zoned != 0; 3787 } 3788 3789 #endif 3790