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) 302 303 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 304 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 305 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 306 307 /* 308 * A leaf is full of items. offset and size tell us where to find 309 * the item in the leaf (relative to the start of the data area) 310 */ 311 struct btrfs_item { 312 struct btrfs_disk_key key; 313 __le32 offset; 314 __le32 size; 315 } __attribute__ ((__packed__)); 316 317 /* 318 * leaves have an item area and a data area: 319 * [item0, item1....itemN] [free space] [dataN...data1, data0] 320 * 321 * The data is separate from the items to get the keys closer together 322 * during searches. 323 */ 324 struct btrfs_leaf { 325 struct btrfs_header header; 326 struct btrfs_item items[]; 327 } __attribute__ ((__packed__)); 328 329 /* 330 * all non-leaf blocks are nodes, they hold only keys and pointers to 331 * other blocks 332 */ 333 struct btrfs_key_ptr { 334 struct btrfs_disk_key key; 335 __le64 blockptr; 336 __le64 generation; 337 } __attribute__ ((__packed__)); 338 339 struct btrfs_node { 340 struct btrfs_header header; 341 struct btrfs_key_ptr ptrs[]; 342 } __attribute__ ((__packed__)); 343 344 /* 345 * btrfs_paths remember the path taken from the root down to the leaf. 346 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 347 * to any other levels that are present. 348 * 349 * The slots array records the index of the item or block pointer 350 * used while walking the tree. 351 */ 352 enum { READA_NONE, READA_BACK, READA_FORWARD }; 353 struct btrfs_path { 354 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 355 int slots[BTRFS_MAX_LEVEL]; 356 /* if there is real range locking, this locks field will change */ 357 u8 locks[BTRFS_MAX_LEVEL]; 358 u8 reada; 359 /* keep some upper locks as we walk down */ 360 u8 lowest_level; 361 362 /* 363 * set by btrfs_split_item, tells search_slot to keep all locks 364 * and to force calls to keep space in the nodes 365 */ 366 unsigned int search_for_split:1; 367 unsigned int keep_locks:1; 368 unsigned int skip_locking:1; 369 unsigned int search_commit_root:1; 370 unsigned int need_commit_sem:1; 371 unsigned int skip_release_on_error:1; 372 /* 373 * Indicate that new item (btrfs_search_slot) is extending already 374 * existing item and ins_len contains only the data size and not item 375 * header (ie. sizeof(struct btrfs_item) is not included). 376 */ 377 unsigned int search_for_extension:1; 378 }; 379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 380 sizeof(struct btrfs_item)) 381 struct btrfs_dev_replace { 382 u64 replace_state; /* see #define above */ 383 time64_t time_started; /* seconds since 1-Jan-1970 */ 384 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 385 atomic64_t num_write_errors; 386 atomic64_t num_uncorrectable_read_errors; 387 388 u64 cursor_left; 389 u64 committed_cursor_left; 390 u64 cursor_left_last_write_of_item; 391 u64 cursor_right; 392 393 u64 cont_reading_from_srcdev_mode; /* see #define above */ 394 395 int is_valid; 396 int item_needs_writeback; 397 struct btrfs_device *srcdev; 398 struct btrfs_device *tgtdev; 399 400 struct mutex lock_finishing_cancel_unmount; 401 struct rw_semaphore rwsem; 402 403 struct btrfs_scrub_progress scrub_progress; 404 405 struct percpu_counter bio_counter; 406 wait_queue_head_t replace_wait; 407 }; 408 409 /* 410 * free clusters are used to claim free space in relatively large chunks, 411 * allowing us to do less seeky writes. They are used for all metadata 412 * allocations. In ssd_spread mode they are also used for data allocations. 413 */ 414 struct btrfs_free_cluster { 415 spinlock_t lock; 416 spinlock_t refill_lock; 417 struct rb_root root; 418 419 /* largest extent in this cluster */ 420 u64 max_size; 421 422 /* first extent starting offset */ 423 u64 window_start; 424 425 /* We did a full search and couldn't create a cluster */ 426 bool fragmented; 427 428 struct btrfs_block_group *block_group; 429 /* 430 * when a cluster is allocated from a block group, we put the 431 * cluster onto a list in the block group so that it can 432 * be freed before the block group is freed. 433 */ 434 struct list_head block_group_list; 435 }; 436 437 enum btrfs_caching_type { 438 BTRFS_CACHE_NO, 439 BTRFS_CACHE_STARTED, 440 BTRFS_CACHE_FAST, 441 BTRFS_CACHE_FINISHED, 442 BTRFS_CACHE_ERROR, 443 }; 444 445 /* 446 * Tree to record all locked full stripes of a RAID5/6 block group 447 */ 448 struct btrfs_full_stripe_locks_tree { 449 struct rb_root root; 450 struct mutex lock; 451 }; 452 453 /* Discard control. */ 454 /* 455 * Async discard uses multiple lists to differentiate the discard filter 456 * parameters. Index 0 is for completely free block groups where we need to 457 * ensure the entire block group is trimmed without being lossy. Indices 458 * afterwards represent monotonically decreasing discard filter sizes to 459 * prioritize what should be discarded next. 460 */ 461 #define BTRFS_NR_DISCARD_LISTS 3 462 #define BTRFS_DISCARD_INDEX_UNUSED 0 463 #define BTRFS_DISCARD_INDEX_START 1 464 465 struct btrfs_discard_ctl { 466 struct workqueue_struct *discard_workers; 467 struct delayed_work work; 468 spinlock_t lock; 469 struct btrfs_block_group *block_group; 470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 471 u64 prev_discard; 472 u64 prev_discard_time; 473 atomic_t discardable_extents; 474 atomic64_t discardable_bytes; 475 u64 max_discard_size; 476 u64 delay_ms; 477 u32 iops_limit; 478 u32 kbps_limit; 479 u64 discard_extent_bytes; 480 u64 discard_bitmap_bytes; 481 atomic64_t discard_bytes_saved; 482 }; 483 484 /* delayed seq elem */ 485 struct seq_list { 486 struct list_head list; 487 u64 seq; 488 }; 489 490 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 491 492 #define SEQ_LAST ((u64)-1) 493 494 enum btrfs_orphan_cleanup_state { 495 ORPHAN_CLEANUP_STARTED = 1, 496 ORPHAN_CLEANUP_DONE = 2, 497 }; 498 499 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info); 500 501 /* fs_info */ 502 struct reloc_control; 503 struct btrfs_device; 504 struct btrfs_fs_devices; 505 struct btrfs_balance_control; 506 struct btrfs_delayed_root; 507 508 /* 509 * Block group or device which contains an active swapfile. Used for preventing 510 * unsafe operations while a swapfile is active. 511 * 512 * These are sorted on (ptr, inode) (note that a block group or device can 513 * contain more than one swapfile). We compare the pointer values because we 514 * don't actually care what the object is, we just need a quick check whether 515 * the object exists in the rbtree. 516 */ 517 struct btrfs_swapfile_pin { 518 struct rb_node node; 519 void *ptr; 520 struct inode *inode; 521 /* 522 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 523 * points to a struct btrfs_device. 524 */ 525 bool is_block_group; 526 }; 527 528 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 529 530 enum { 531 BTRFS_FS_BARRIER, 532 BTRFS_FS_CLOSING_START, 533 BTRFS_FS_CLOSING_DONE, 534 BTRFS_FS_LOG_RECOVERING, 535 BTRFS_FS_OPEN, 536 BTRFS_FS_QUOTA_ENABLED, 537 BTRFS_FS_UPDATE_UUID_TREE_GEN, 538 BTRFS_FS_CREATING_FREE_SPACE_TREE, 539 BTRFS_FS_BTREE_ERR, 540 BTRFS_FS_LOG1_ERR, 541 BTRFS_FS_LOG2_ERR, 542 BTRFS_FS_QUOTA_OVERRIDE, 543 /* Used to record internally whether fs has been frozen */ 544 BTRFS_FS_FROZEN, 545 /* 546 * Indicate that balance has been set up from the ioctl and is in the 547 * main phase. The fs_info::balance_ctl is initialized. 548 * Set and cleared while holding fs_info::balance_mutex. 549 */ 550 BTRFS_FS_BALANCE_RUNNING, 551 552 /* Indicate that the cleaner thread is awake and doing something. */ 553 BTRFS_FS_CLEANER_RUNNING, 554 555 /* 556 * The checksumming has an optimized version and is considered fast, 557 * so we don't need to offload checksums to workqueues. 558 */ 559 BTRFS_FS_CSUM_IMPL_FAST, 560 561 /* Indicate that the discard workqueue can service discards. */ 562 BTRFS_FS_DISCARD_RUNNING, 563 564 /* Indicate that we need to cleanup space cache v1 */ 565 BTRFS_FS_CLEANUP_SPACE_CACHE_V1, 566 }; 567 568 /* 569 * Exclusive operations (device replace, resize, device add/remove, balance) 570 */ 571 enum btrfs_exclusive_operation { 572 BTRFS_EXCLOP_NONE, 573 BTRFS_EXCLOP_BALANCE, 574 BTRFS_EXCLOP_DEV_ADD, 575 BTRFS_EXCLOP_DEV_REMOVE, 576 BTRFS_EXCLOP_DEV_REPLACE, 577 BTRFS_EXCLOP_RESIZE, 578 BTRFS_EXCLOP_SWAP_ACTIVATE, 579 }; 580 581 struct btrfs_fs_info { 582 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 583 unsigned long flags; 584 struct btrfs_root *extent_root; 585 struct btrfs_root *tree_root; 586 struct btrfs_root *chunk_root; 587 struct btrfs_root *dev_root; 588 struct btrfs_root *fs_root; 589 struct btrfs_root *csum_root; 590 struct btrfs_root *quota_root; 591 struct btrfs_root *uuid_root; 592 struct btrfs_root *free_space_root; 593 struct btrfs_root *data_reloc_root; 594 595 /* the log root tree is a directory of all the other log roots */ 596 struct btrfs_root *log_root_tree; 597 598 spinlock_t fs_roots_radix_lock; 599 struct radix_tree_root fs_roots_radix; 600 601 /* block group cache stuff */ 602 spinlock_t block_group_cache_lock; 603 u64 first_logical_byte; 604 struct rb_root block_group_cache_tree; 605 606 /* keep track of unallocated space */ 607 atomic64_t free_chunk_space; 608 609 /* Track ranges which are used by log trees blocks/logged data extents */ 610 struct extent_io_tree excluded_extents; 611 612 /* logical->physical extent mapping */ 613 struct extent_map_tree mapping_tree; 614 615 /* 616 * block reservation for extent, checksum, root tree and 617 * delayed dir index item 618 */ 619 struct btrfs_block_rsv global_block_rsv; 620 /* block reservation for metadata operations */ 621 struct btrfs_block_rsv trans_block_rsv; 622 /* block reservation for chunk tree */ 623 struct btrfs_block_rsv chunk_block_rsv; 624 /* block reservation for delayed operations */ 625 struct btrfs_block_rsv delayed_block_rsv; 626 /* block reservation for delayed refs */ 627 struct btrfs_block_rsv delayed_refs_rsv; 628 629 struct btrfs_block_rsv empty_block_rsv; 630 631 u64 generation; 632 u64 last_trans_committed; 633 u64 avg_delayed_ref_runtime; 634 635 /* 636 * this is updated to the current trans every time a full commit 637 * is required instead of the faster short fsync log commits 638 */ 639 u64 last_trans_log_full_commit; 640 unsigned long mount_opt; 641 /* 642 * Track requests for actions that need to be done during transaction 643 * commit (like for some mount options). 644 */ 645 unsigned long pending_changes; 646 unsigned long compress_type:4; 647 unsigned int compress_level; 648 u32 commit_interval; 649 /* 650 * It is a suggestive number, the read side is safe even it gets a 651 * wrong number because we will write out the data into a regular 652 * extent. The write side(mount/remount) is under ->s_umount lock, 653 * so it is also safe. 654 */ 655 u64 max_inline; 656 657 struct btrfs_transaction *running_transaction; 658 wait_queue_head_t transaction_throttle; 659 wait_queue_head_t transaction_wait; 660 wait_queue_head_t transaction_blocked_wait; 661 wait_queue_head_t async_submit_wait; 662 663 /* 664 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 665 * when they are updated. 666 * 667 * Because we do not clear the flags for ever, so we needn't use 668 * the lock on the read side. 669 * 670 * We also needn't use the lock when we mount the fs, because 671 * there is no other task which will update the flag. 672 */ 673 spinlock_t super_lock; 674 struct btrfs_super_block *super_copy; 675 struct btrfs_super_block *super_for_commit; 676 struct super_block *sb; 677 struct inode *btree_inode; 678 struct mutex tree_log_mutex; 679 struct mutex transaction_kthread_mutex; 680 struct mutex cleaner_mutex; 681 struct mutex chunk_mutex; 682 683 /* 684 * this is taken to make sure we don't set block groups ro after 685 * the free space cache has been allocated on them 686 */ 687 struct mutex ro_block_group_mutex; 688 689 /* this is used during read/modify/write to make sure 690 * no two ios are trying to mod the same stripe at the same 691 * time 692 */ 693 struct btrfs_stripe_hash_table *stripe_hash_table; 694 695 /* 696 * this protects the ordered operations list only while we are 697 * processing all of the entries on it. This way we make 698 * sure the commit code doesn't find the list temporarily empty 699 * because another function happens to be doing non-waiting preflush 700 * before jumping into the main commit. 701 */ 702 struct mutex ordered_operations_mutex; 703 704 struct rw_semaphore commit_root_sem; 705 706 struct rw_semaphore cleanup_work_sem; 707 708 struct rw_semaphore subvol_sem; 709 710 spinlock_t trans_lock; 711 /* 712 * the reloc mutex goes with the trans lock, it is taken 713 * during commit to protect us from the relocation code 714 */ 715 struct mutex reloc_mutex; 716 717 struct list_head trans_list; 718 struct list_head dead_roots; 719 struct list_head caching_block_groups; 720 721 spinlock_t delayed_iput_lock; 722 struct list_head delayed_iputs; 723 atomic_t nr_delayed_iputs; 724 wait_queue_head_t delayed_iputs_wait; 725 726 atomic64_t tree_mod_seq; 727 728 /* this protects tree_mod_log and tree_mod_seq_list */ 729 rwlock_t tree_mod_log_lock; 730 struct rb_root tree_mod_log; 731 struct list_head tree_mod_seq_list; 732 733 atomic_t async_delalloc_pages; 734 735 /* 736 * this is used to protect the following list -- ordered_roots. 737 */ 738 spinlock_t ordered_root_lock; 739 740 /* 741 * all fs/file tree roots in which there are data=ordered extents 742 * pending writeback are added into this list. 743 * 744 * these can span multiple transactions and basically include 745 * every dirty data page that isn't from nodatacow 746 */ 747 struct list_head ordered_roots; 748 749 struct mutex delalloc_root_mutex; 750 spinlock_t delalloc_root_lock; 751 /* all fs/file tree roots that have delalloc inodes. */ 752 struct list_head delalloc_roots; 753 754 /* 755 * there is a pool of worker threads for checksumming during writes 756 * and a pool for checksumming after reads. This is because readers 757 * can run with FS locks held, and the writers may be waiting for 758 * those locks. We don't want ordering in the pending list to cause 759 * deadlocks, and so the two are serviced separately. 760 * 761 * A third pool does submit_bio to avoid deadlocking with the other 762 * two 763 */ 764 struct btrfs_workqueue *workers; 765 struct btrfs_workqueue *delalloc_workers; 766 struct btrfs_workqueue *flush_workers; 767 struct btrfs_workqueue *endio_workers; 768 struct btrfs_workqueue *endio_meta_workers; 769 struct btrfs_workqueue *endio_raid56_workers; 770 struct btrfs_workqueue *rmw_workers; 771 struct btrfs_workqueue *endio_meta_write_workers; 772 struct btrfs_workqueue *endio_write_workers; 773 struct btrfs_workqueue *endio_freespace_worker; 774 struct btrfs_workqueue *caching_workers; 775 struct btrfs_workqueue *readahead_workers; 776 777 /* 778 * fixup workers take dirty pages that didn't properly go through 779 * the cow mechanism and make them safe to write. It happens 780 * for the sys_munmap function call path 781 */ 782 struct btrfs_workqueue *fixup_workers; 783 struct btrfs_workqueue *delayed_workers; 784 785 struct task_struct *transaction_kthread; 786 struct task_struct *cleaner_kthread; 787 u32 thread_pool_size; 788 789 struct kobject *space_info_kobj; 790 struct kobject *qgroups_kobj; 791 792 u64 total_pinned; 793 794 /* used to keep from writing metadata until there is a nice batch */ 795 struct percpu_counter dirty_metadata_bytes; 796 struct percpu_counter delalloc_bytes; 797 struct percpu_counter dio_bytes; 798 s32 dirty_metadata_batch; 799 s32 delalloc_batch; 800 801 struct list_head dirty_cowonly_roots; 802 803 struct btrfs_fs_devices *fs_devices; 804 805 /* 806 * The space_info list is effectively read only after initial 807 * setup. It is populated at mount time and cleaned up after 808 * all block groups are removed. RCU is used to protect it. 809 */ 810 struct list_head space_info; 811 812 struct btrfs_space_info *data_sinfo; 813 814 struct reloc_control *reloc_ctl; 815 816 /* data_alloc_cluster is only used in ssd_spread mode */ 817 struct btrfs_free_cluster data_alloc_cluster; 818 819 /* all metadata allocations go through this cluster */ 820 struct btrfs_free_cluster meta_alloc_cluster; 821 822 /* auto defrag inodes go here */ 823 spinlock_t defrag_inodes_lock; 824 struct rb_root defrag_inodes; 825 atomic_t defrag_running; 826 827 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 828 seqlock_t profiles_lock; 829 /* 830 * these three are in extended format (availability of single 831 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 832 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 833 */ 834 u64 avail_data_alloc_bits; 835 u64 avail_metadata_alloc_bits; 836 u64 avail_system_alloc_bits; 837 838 /* restriper state */ 839 spinlock_t balance_lock; 840 struct mutex balance_mutex; 841 atomic_t balance_pause_req; 842 atomic_t balance_cancel_req; 843 struct btrfs_balance_control *balance_ctl; 844 wait_queue_head_t balance_wait_q; 845 846 u32 data_chunk_allocations; 847 u32 metadata_ratio; 848 849 void *bdev_holder; 850 851 /* private scrub information */ 852 struct mutex scrub_lock; 853 atomic_t scrubs_running; 854 atomic_t scrub_pause_req; 855 atomic_t scrubs_paused; 856 atomic_t scrub_cancel_req; 857 wait_queue_head_t scrub_pause_wait; 858 /* 859 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 860 * running. 861 */ 862 refcount_t scrub_workers_refcnt; 863 struct btrfs_workqueue *scrub_workers; 864 struct btrfs_workqueue *scrub_wr_completion_workers; 865 struct btrfs_workqueue *scrub_parity_workers; 866 867 struct btrfs_discard_ctl discard_ctl; 868 869 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 870 u32 check_integrity_print_mask; 871 #endif 872 /* is qgroup tracking in a consistent state? */ 873 u64 qgroup_flags; 874 875 /* holds configuration and tracking. Protected by qgroup_lock */ 876 struct rb_root qgroup_tree; 877 spinlock_t qgroup_lock; 878 879 /* 880 * used to avoid frequently calling ulist_alloc()/ulist_free() 881 * when doing qgroup accounting, it must be protected by qgroup_lock. 882 */ 883 struct ulist *qgroup_ulist; 884 885 /* 886 * Protect user change for quota operations. If a transaction is needed, 887 * it must be started before locking this lock. 888 */ 889 struct mutex qgroup_ioctl_lock; 890 891 /* list of dirty qgroups to be written at next commit */ 892 struct list_head dirty_qgroups; 893 894 /* used by qgroup for an efficient tree traversal */ 895 u64 qgroup_seq; 896 897 /* qgroup rescan items */ 898 struct mutex qgroup_rescan_lock; /* protects the progress item */ 899 struct btrfs_key qgroup_rescan_progress; 900 struct btrfs_workqueue *qgroup_rescan_workers; 901 struct completion qgroup_rescan_completion; 902 struct btrfs_work qgroup_rescan_work; 903 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 904 905 /* filesystem state */ 906 unsigned long fs_state; 907 908 struct btrfs_delayed_root *delayed_root; 909 910 /* readahead tree */ 911 spinlock_t reada_lock; 912 struct radix_tree_root reada_tree; 913 914 /* readahead works cnt */ 915 atomic_t reada_works_cnt; 916 917 /* Extent buffer radix tree */ 918 spinlock_t buffer_lock; 919 /* Entries are eb->start / sectorsize */ 920 struct radix_tree_root buffer_radix; 921 922 /* next backup root to be overwritten */ 923 int backup_root_index; 924 925 /* device replace state */ 926 struct btrfs_dev_replace dev_replace; 927 928 struct semaphore uuid_tree_rescan_sem; 929 930 /* Used to reclaim the metadata space in the background. */ 931 struct work_struct async_reclaim_work; 932 struct work_struct async_data_reclaim_work; 933 934 spinlock_t unused_bgs_lock; 935 struct list_head unused_bgs; 936 struct mutex unused_bg_unpin_mutex; 937 struct mutex delete_unused_bgs_mutex; 938 939 /* Cached block sizes */ 940 u32 nodesize; 941 u32 sectorsize; 942 /* ilog2 of sectorsize, use to avoid 64bit division */ 943 u32 sectorsize_bits; 944 u32 csum_size; 945 u32 csums_per_leaf; 946 u32 stripesize; 947 948 /* Block groups and devices containing active swapfiles. */ 949 spinlock_t swapfile_pins_lock; 950 struct rb_root swapfile_pins; 951 952 struct crypto_shash *csum_shash; 953 954 /* 955 * Number of send operations in progress. 956 * Updated while holding fs_info::balance_mutex. 957 */ 958 int send_in_progress; 959 960 /* Type of exclusive operation running */ 961 unsigned long exclusive_operation; 962 963 /* 964 * Zone size > 0 when in ZONED mode, otherwise it's used for a check 965 * if the mode is enabled 966 */ 967 union { 968 u64 zone_size; 969 u64 zoned; 970 }; 971 972 /* Max size to emit ZONE_APPEND write command */ 973 u64 max_zone_append_size; 974 975 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 976 spinlock_t ref_verify_lock; 977 struct rb_root block_tree; 978 #endif 979 980 #ifdef CONFIG_BTRFS_DEBUG 981 struct kobject *debug_kobj; 982 struct kobject *discard_debug_kobj; 983 struct list_head allocated_roots; 984 985 spinlock_t eb_leak_lock; 986 struct list_head allocated_ebs; 987 #endif 988 }; 989 990 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 991 { 992 return sb->s_fs_info; 993 } 994 995 /* 996 * The state of btrfs root 997 */ 998 enum { 999 /* 1000 * btrfs_record_root_in_trans is a multi-step process, and it can race 1001 * with the balancing code. But the race is very small, and only the 1002 * first time the root is added to each transaction. So IN_TRANS_SETUP 1003 * is used to tell us when more checks are required 1004 */ 1005 BTRFS_ROOT_IN_TRANS_SETUP, 1006 1007 /* 1008 * Set if tree blocks of this root can be shared by other roots. 1009 * Only subvolume trees and their reloc trees have this bit set. 1010 * Conflicts with TRACK_DIRTY bit. 1011 * 1012 * This affects two things: 1013 * 1014 * - How balance works 1015 * For shareable roots, we need to use reloc tree and do path 1016 * replacement for balance, and need various pre/post hooks for 1017 * snapshot creation to handle them. 1018 * 1019 * While for non-shareable trees, we just simply do a tree search 1020 * with COW. 1021 * 1022 * - How dirty roots are tracked 1023 * For shareable roots, btrfs_record_root_in_trans() is needed to 1024 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1025 * don't need to set this manually. 1026 */ 1027 BTRFS_ROOT_SHAREABLE, 1028 BTRFS_ROOT_TRACK_DIRTY, 1029 BTRFS_ROOT_IN_RADIX, 1030 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1031 BTRFS_ROOT_DEFRAG_RUNNING, 1032 BTRFS_ROOT_FORCE_COW, 1033 BTRFS_ROOT_MULTI_LOG_TASKS, 1034 BTRFS_ROOT_DIRTY, 1035 BTRFS_ROOT_DELETING, 1036 1037 /* 1038 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1039 * 1040 * Set for the subvolume tree owning the reloc tree. 1041 */ 1042 BTRFS_ROOT_DEAD_RELOC_TREE, 1043 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1044 BTRFS_ROOT_DEAD_TREE, 1045 /* The root has a log tree. Used for subvolume roots and the tree root. */ 1046 BTRFS_ROOT_HAS_LOG_TREE, 1047 /* Qgroup flushing is in progress */ 1048 BTRFS_ROOT_QGROUP_FLUSHING, 1049 }; 1050 1051 /* 1052 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1053 * code. For detail check comment in fs/btrfs/qgroup.c. 1054 */ 1055 struct btrfs_qgroup_swapped_blocks { 1056 spinlock_t lock; 1057 /* RM_EMPTY_ROOT() of above blocks[] */ 1058 bool swapped; 1059 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1060 }; 1061 1062 /* 1063 * in ram representation of the tree. extent_root is used for all allocations 1064 * and for the extent tree extent_root root. 1065 */ 1066 struct btrfs_root { 1067 struct extent_buffer *node; 1068 1069 struct extent_buffer *commit_root; 1070 struct btrfs_root *log_root; 1071 struct btrfs_root *reloc_root; 1072 1073 unsigned long state; 1074 struct btrfs_root_item root_item; 1075 struct btrfs_key root_key; 1076 struct btrfs_fs_info *fs_info; 1077 struct extent_io_tree dirty_log_pages; 1078 1079 struct mutex objectid_mutex; 1080 1081 spinlock_t accounting_lock; 1082 struct btrfs_block_rsv *block_rsv; 1083 1084 struct mutex log_mutex; 1085 wait_queue_head_t log_writer_wait; 1086 wait_queue_head_t log_commit_wait[2]; 1087 struct list_head log_ctxs[2]; 1088 /* Used only for log trees of subvolumes, not for the log root tree */ 1089 atomic_t log_writers; 1090 atomic_t log_commit[2]; 1091 /* Used only for log trees of subvolumes, not for the log root tree */ 1092 atomic_t log_batch; 1093 int log_transid; 1094 /* No matter the commit succeeds or not*/ 1095 int log_transid_committed; 1096 /* Just be updated when the commit succeeds. */ 1097 int last_log_commit; 1098 pid_t log_start_pid; 1099 1100 u64 last_trans; 1101 1102 u32 type; 1103 1104 u64 highest_objectid; 1105 1106 struct btrfs_key defrag_progress; 1107 struct btrfs_key defrag_max; 1108 1109 /* The dirty list is only used by non-shareable roots */ 1110 struct list_head dirty_list; 1111 1112 struct list_head root_list; 1113 1114 spinlock_t log_extents_lock[2]; 1115 struct list_head logged_list[2]; 1116 1117 int orphan_cleanup_state; 1118 1119 spinlock_t inode_lock; 1120 /* red-black tree that keeps track of in-memory inodes */ 1121 struct rb_root inode_tree; 1122 1123 /* 1124 * radix tree that keeps track of delayed nodes of every inode, 1125 * protected by inode_lock 1126 */ 1127 struct radix_tree_root delayed_nodes_tree; 1128 /* 1129 * right now this just gets used so that a root has its own devid 1130 * for stat. It may be used for more later 1131 */ 1132 dev_t anon_dev; 1133 1134 spinlock_t root_item_lock; 1135 refcount_t refs; 1136 1137 struct mutex delalloc_mutex; 1138 spinlock_t delalloc_lock; 1139 /* 1140 * all of the inodes that have delalloc bytes. It is possible for 1141 * this list to be empty even when there is still dirty data=ordered 1142 * extents waiting to finish IO. 1143 */ 1144 struct list_head delalloc_inodes; 1145 struct list_head delalloc_root; 1146 u64 nr_delalloc_inodes; 1147 1148 struct mutex ordered_extent_mutex; 1149 /* 1150 * this is used by the balancing code to wait for all the pending 1151 * ordered extents 1152 */ 1153 spinlock_t ordered_extent_lock; 1154 1155 /* 1156 * all of the data=ordered extents pending writeback 1157 * these can span multiple transactions and basically include 1158 * every dirty data page that isn't from nodatacow 1159 */ 1160 struct list_head ordered_extents; 1161 struct list_head ordered_root; 1162 u64 nr_ordered_extents; 1163 1164 /* 1165 * Not empty if this subvolume root has gone through tree block swap 1166 * (relocation) 1167 * 1168 * Will be used by reloc_control::dirty_subvol_roots. 1169 */ 1170 struct list_head reloc_dirty_list; 1171 1172 /* 1173 * Number of currently running SEND ioctls to prevent 1174 * manipulation with the read-only status via SUBVOL_SETFLAGS 1175 */ 1176 int send_in_progress; 1177 /* 1178 * Number of currently running deduplication operations that have a 1179 * destination inode belonging to this root. Protected by the lock 1180 * root_item_lock. 1181 */ 1182 int dedupe_in_progress; 1183 /* For exclusion of snapshot creation and nocow writes */ 1184 struct btrfs_drew_lock snapshot_lock; 1185 1186 atomic_t snapshot_force_cow; 1187 1188 /* For qgroup metadata reserved space */ 1189 spinlock_t qgroup_meta_rsv_lock; 1190 u64 qgroup_meta_rsv_pertrans; 1191 u64 qgroup_meta_rsv_prealloc; 1192 wait_queue_head_t qgroup_flush_wait; 1193 1194 /* Number of active swapfiles */ 1195 atomic_t nr_swapfiles; 1196 1197 /* Record pairs of swapped blocks for qgroup */ 1198 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1199 1200 /* Used only by log trees, when logging csum items */ 1201 struct extent_io_tree log_csum_range; 1202 1203 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1204 u64 alloc_bytenr; 1205 #endif 1206 1207 #ifdef CONFIG_BTRFS_DEBUG 1208 struct list_head leak_list; 1209 #endif 1210 }; 1211 1212 /* 1213 * Structure that conveys information about an extent that is going to replace 1214 * all the extents in a file range. 1215 */ 1216 struct btrfs_replace_extent_info { 1217 u64 disk_offset; 1218 u64 disk_len; 1219 u64 data_offset; 1220 u64 data_len; 1221 u64 file_offset; 1222 /* Pointer to a file extent item of type regular or prealloc. */ 1223 char *extent_buf; 1224 /* 1225 * Set to true when attempting to replace a file range with a new extent 1226 * described by this structure, set to false when attempting to clone an 1227 * existing extent into a file range. 1228 */ 1229 bool is_new_extent; 1230 /* Meaningful only if is_new_extent is true. */ 1231 int qgroup_reserved; 1232 /* 1233 * Meaningful only if is_new_extent is true. 1234 * Used to track how many extent items we have already inserted in a 1235 * subvolume tree that refer to the extent described by this structure, 1236 * so that we know when to create a new delayed ref or update an existing 1237 * one. 1238 */ 1239 int insertions; 1240 }; 1241 1242 /* Arguments for btrfs_drop_extents() */ 1243 struct btrfs_drop_extents_args { 1244 /* Input parameters */ 1245 1246 /* 1247 * If NULL, btrfs_drop_extents() will allocate and free its own path. 1248 * If 'replace_extent' is true, this must not be NULL. Also the path 1249 * is always released except if 'replace_extent' is true and 1250 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case 1251 * the path is kept locked. 1252 */ 1253 struct btrfs_path *path; 1254 /* Start offset of the range to drop extents from */ 1255 u64 start; 1256 /* End (exclusive, last byte + 1) of the range to drop extents from */ 1257 u64 end; 1258 /* If true drop all the extent maps in the range */ 1259 bool drop_cache; 1260 /* 1261 * If true it means we want to insert a new extent after dropping all 1262 * the extents in the range. If this is true, the 'extent_item_size' 1263 * parameter must be set as well and the 'extent_inserted' field will 1264 * be set to true by btrfs_drop_extents() if it could insert the new 1265 * extent. 1266 * Note: when this is set to true the path must not be NULL. 1267 */ 1268 bool replace_extent; 1269 /* 1270 * Used if 'replace_extent' is true. Size of the file extent item to 1271 * insert after dropping all existing extents in the range 1272 */ 1273 u32 extent_item_size; 1274 1275 /* Output parameters */ 1276 1277 /* 1278 * Set to the minimum between the input parameter 'end' and the end 1279 * (exclusive, last byte + 1) of the last dropped extent. This is always 1280 * set even if btrfs_drop_extents() returns an error. 1281 */ 1282 u64 drop_end; 1283 /* 1284 * The number of allocated bytes found in the range. This can be smaller 1285 * than the range's length when there are holes in the range. 1286 */ 1287 u64 bytes_found; 1288 /* 1289 * Only set if 'replace_extent' is true. Set to true if we were able 1290 * to insert a replacement extent after dropping all extents in the 1291 * range, otherwise set to false by btrfs_drop_extents(). 1292 * Also, if btrfs_drop_extents() has set this to true it means it 1293 * returned with the path locked, otherwise if it has set this to 1294 * false it has returned with the path released. 1295 */ 1296 bool extent_inserted; 1297 }; 1298 1299 struct btrfs_file_private { 1300 void *filldir_buf; 1301 }; 1302 1303 1304 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1305 { 1306 1307 return info->nodesize - sizeof(struct btrfs_header); 1308 } 1309 1310 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1311 1312 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1313 { 1314 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1315 } 1316 1317 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1318 { 1319 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1320 } 1321 1322 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1323 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1324 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1325 { 1326 return BTRFS_MAX_ITEM_SIZE(info) - 1327 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1328 } 1329 1330 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1331 { 1332 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1333 } 1334 1335 /* 1336 * Flags for mount options. 1337 * 1338 * Note: don't forget to add new options to btrfs_show_options() 1339 */ 1340 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1341 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1342 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1343 #define BTRFS_MOUNT_SSD (1 << 3) 1344 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1345 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1346 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1347 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1348 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1349 #define BTRFS_MOUNT_NOSSD (1 << 9) 1350 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1351 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1352 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1353 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1354 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1355 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1356 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1357 /* bit 17 is free */ 1358 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1359 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1360 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1361 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1362 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1363 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1364 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1365 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1366 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1367 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1368 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1369 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1370 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30) 1371 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31) 1372 1373 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1374 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1375 1376 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1377 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1378 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1379 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1380 BTRFS_MOUNT_##opt) 1381 1382 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1383 do { \ 1384 if (!btrfs_test_opt(fs_info, opt)) \ 1385 btrfs_info(fs_info, fmt, ##args); \ 1386 btrfs_set_opt(fs_info->mount_opt, opt); \ 1387 } while (0) 1388 1389 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1390 do { \ 1391 if (btrfs_test_opt(fs_info, opt)) \ 1392 btrfs_info(fs_info, fmt, ##args); \ 1393 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1394 } while (0) 1395 1396 /* 1397 * Requests for changes that need to be done during transaction commit. 1398 * 1399 * Internal mount options that are used for special handling of the real 1400 * mount options (eg. cannot be set during remount and have to be set during 1401 * transaction commit) 1402 */ 1403 1404 #define BTRFS_PENDING_COMMIT (0) 1405 1406 #define btrfs_test_pending(info, opt) \ 1407 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1408 #define btrfs_set_pending(info, opt) \ 1409 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1410 #define btrfs_clear_pending(info, opt) \ 1411 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1412 1413 /* 1414 * Helpers for setting pending mount option changes. 1415 * 1416 * Expects corresponding macros 1417 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1418 */ 1419 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1420 do { \ 1421 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1422 btrfs_info((info), fmt, ##args); \ 1423 btrfs_set_pending((info), SET_##opt); \ 1424 btrfs_clear_pending((info), CLEAR_##opt); \ 1425 } \ 1426 } while(0) 1427 1428 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1429 do { \ 1430 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1431 btrfs_info((info), fmt, ##args); \ 1432 btrfs_set_pending((info), CLEAR_##opt); \ 1433 btrfs_clear_pending((info), SET_##opt); \ 1434 } \ 1435 } while(0) 1436 1437 /* 1438 * Inode flags 1439 */ 1440 #define BTRFS_INODE_NODATASUM (1 << 0) 1441 #define BTRFS_INODE_NODATACOW (1 << 1) 1442 #define BTRFS_INODE_READONLY (1 << 2) 1443 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1444 #define BTRFS_INODE_PREALLOC (1 << 4) 1445 #define BTRFS_INODE_SYNC (1 << 5) 1446 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1447 #define BTRFS_INODE_APPEND (1 << 7) 1448 #define BTRFS_INODE_NODUMP (1 << 8) 1449 #define BTRFS_INODE_NOATIME (1 << 9) 1450 #define BTRFS_INODE_DIRSYNC (1 << 10) 1451 #define BTRFS_INODE_COMPRESS (1 << 11) 1452 1453 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1454 1455 #define BTRFS_INODE_FLAG_MASK \ 1456 (BTRFS_INODE_NODATASUM | \ 1457 BTRFS_INODE_NODATACOW | \ 1458 BTRFS_INODE_READONLY | \ 1459 BTRFS_INODE_NOCOMPRESS | \ 1460 BTRFS_INODE_PREALLOC | \ 1461 BTRFS_INODE_SYNC | \ 1462 BTRFS_INODE_IMMUTABLE | \ 1463 BTRFS_INODE_APPEND | \ 1464 BTRFS_INODE_NODUMP | \ 1465 BTRFS_INODE_NOATIME | \ 1466 BTRFS_INODE_DIRSYNC | \ 1467 BTRFS_INODE_COMPRESS | \ 1468 BTRFS_INODE_ROOT_ITEM_INIT) 1469 1470 struct btrfs_map_token { 1471 struct extent_buffer *eb; 1472 char *kaddr; 1473 unsigned long offset; 1474 }; 1475 1476 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1477 ((bytes) >> (fs_info)->sectorsize_bits) 1478 1479 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1480 struct extent_buffer *eb) 1481 { 1482 token->eb = eb; 1483 token->kaddr = page_address(eb->pages[0]); 1484 token->offset = 0; 1485 } 1486 1487 /* some macros to generate set/get functions for the struct fields. This 1488 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1489 * one for u8: 1490 */ 1491 #define le8_to_cpu(v) (v) 1492 #define cpu_to_le8(v) (v) 1493 #define __le8 u8 1494 1495 static inline u8 get_unaligned_le8(const void *p) 1496 { 1497 return *(u8 *)p; 1498 } 1499 1500 static inline void put_unaligned_le8(u8 val, void *p) 1501 { 1502 *(u8 *)p = val; 1503 } 1504 1505 #define read_eb_member(eb, ptr, type, member, result) (\ 1506 read_extent_buffer(eb, (char *)(result), \ 1507 ((unsigned long)(ptr)) + \ 1508 offsetof(type, member), \ 1509 sizeof(((type *)0)->member))) 1510 1511 #define write_eb_member(eb, ptr, type, member, result) (\ 1512 write_extent_buffer(eb, (char *)(result), \ 1513 ((unsigned long)(ptr)) + \ 1514 offsetof(type, member), \ 1515 sizeof(((type *)0)->member))) 1516 1517 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1518 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1519 const void *ptr, unsigned long off); \ 1520 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1521 const void *ptr, unsigned long off, \ 1522 u##bits val); \ 1523 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1524 const void *ptr, unsigned long off); \ 1525 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1526 unsigned long off, u##bits val); 1527 1528 DECLARE_BTRFS_SETGET_BITS(8) 1529 DECLARE_BTRFS_SETGET_BITS(16) 1530 DECLARE_BTRFS_SETGET_BITS(32) 1531 DECLARE_BTRFS_SETGET_BITS(64) 1532 1533 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1534 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1535 const type *s) \ 1536 { \ 1537 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1538 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1539 } \ 1540 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1541 u##bits val) \ 1542 { \ 1543 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1544 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1545 } \ 1546 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1547 const type *s) \ 1548 { \ 1549 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1550 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1551 } \ 1552 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1553 type *s, u##bits val) \ 1554 { \ 1555 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1556 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1557 } 1558 1559 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1560 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1561 { \ 1562 const type *p = page_address(eb->pages[0]) + \ 1563 offset_in_page(eb->start); \ 1564 return get_unaligned_le##bits(&p->member); \ 1565 } \ 1566 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1567 u##bits val) \ 1568 { \ 1569 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \ 1570 put_unaligned_le##bits(val, &p->member); \ 1571 } 1572 1573 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1574 static inline u##bits btrfs_##name(const type *s) \ 1575 { \ 1576 return get_unaligned_le##bits(&s->member); \ 1577 } \ 1578 static inline void btrfs_set_##name(type *s, u##bits val) \ 1579 { \ 1580 put_unaligned_le##bits(val, &s->member); \ 1581 } 1582 1583 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1584 struct btrfs_dev_item *s) 1585 { 1586 BUILD_BUG_ON(sizeof(u64) != 1587 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1588 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1589 total_bytes)); 1590 } 1591 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1592 struct btrfs_dev_item *s, 1593 u64 val) 1594 { 1595 BUILD_BUG_ON(sizeof(u64) != 1596 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1597 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1598 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1599 } 1600 1601 1602 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1603 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1604 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1605 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1606 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1607 start_offset, 64); 1608 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1609 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1610 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1611 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1612 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1613 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1614 1615 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1616 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1617 total_bytes, 64); 1618 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1619 bytes_used, 64); 1620 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1621 io_align, 32); 1622 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1623 io_width, 32); 1624 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1625 sector_size, 32); 1626 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1627 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1628 dev_group, 32); 1629 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1630 seek_speed, 8); 1631 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1632 bandwidth, 8); 1633 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1634 generation, 64); 1635 1636 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1637 { 1638 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1639 } 1640 1641 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1642 { 1643 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1644 } 1645 1646 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1647 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1648 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1649 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1650 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1651 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1652 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1653 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1654 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1655 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1656 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1657 1658 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1659 { 1660 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1661 } 1662 1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1664 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1666 stripe_len, 64); 1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1668 io_align, 32); 1669 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1670 io_width, 32); 1671 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1672 sector_size, 32); 1673 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1675 num_stripes, 16); 1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1677 sub_stripes, 16); 1678 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1679 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1680 1681 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1682 int nr) 1683 { 1684 unsigned long offset = (unsigned long)c; 1685 offset += offsetof(struct btrfs_chunk, stripe); 1686 offset += nr * sizeof(struct btrfs_stripe); 1687 return (struct btrfs_stripe *)offset; 1688 } 1689 1690 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1691 { 1692 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1693 } 1694 1695 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1696 struct btrfs_chunk *c, int nr) 1697 { 1698 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1699 } 1700 1701 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1702 struct btrfs_chunk *c, int nr) 1703 { 1704 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1705 } 1706 1707 /* struct btrfs_block_group_item */ 1708 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1709 used, 64); 1710 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1711 used, 64); 1712 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1713 struct btrfs_block_group_item, chunk_objectid, 64); 1714 1715 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1716 struct btrfs_block_group_item, chunk_objectid, 64); 1717 BTRFS_SETGET_FUNCS(block_group_flags, 1718 struct btrfs_block_group_item, flags, 64); 1719 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1720 struct btrfs_block_group_item, flags, 64); 1721 1722 /* struct btrfs_free_space_info */ 1723 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1724 extent_count, 32); 1725 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1726 1727 /* struct btrfs_inode_ref */ 1728 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1729 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1730 1731 /* struct btrfs_inode_extref */ 1732 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1733 parent_objectid, 64); 1734 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1735 name_len, 16); 1736 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1737 1738 /* struct btrfs_inode_item */ 1739 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1740 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1741 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1742 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1743 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1744 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1745 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1746 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1747 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1748 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1749 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1750 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1751 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1752 generation, 64); 1753 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1754 sequence, 64); 1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1756 transid, 64); 1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1759 nbytes, 64); 1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1761 block_group, 64); 1762 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1764 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1765 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1767 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1768 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1769 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1770 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1771 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1772 1773 /* struct btrfs_dev_extent */ 1774 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1775 chunk_tree, 64); 1776 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1777 chunk_objectid, 64); 1778 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1779 chunk_offset, 64); 1780 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1781 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1782 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1783 generation, 64); 1784 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1785 1786 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1787 1788 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1789 struct btrfs_tree_block_info *item, 1790 struct btrfs_disk_key *key) 1791 { 1792 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1793 } 1794 1795 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1796 struct btrfs_tree_block_info *item, 1797 struct btrfs_disk_key *key) 1798 { 1799 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1800 } 1801 1802 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1803 root, 64); 1804 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1805 objectid, 64); 1806 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1807 offset, 64); 1808 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1809 count, 32); 1810 1811 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1812 count, 32); 1813 1814 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1815 type, 8); 1816 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1817 offset, 64); 1818 1819 static inline u32 btrfs_extent_inline_ref_size(int type) 1820 { 1821 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1822 type == BTRFS_SHARED_BLOCK_REF_KEY) 1823 return sizeof(struct btrfs_extent_inline_ref); 1824 if (type == BTRFS_SHARED_DATA_REF_KEY) 1825 return sizeof(struct btrfs_shared_data_ref) + 1826 sizeof(struct btrfs_extent_inline_ref); 1827 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1828 return sizeof(struct btrfs_extent_data_ref) + 1829 offsetof(struct btrfs_extent_inline_ref, offset); 1830 return 0; 1831 } 1832 1833 /* struct btrfs_node */ 1834 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1835 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1836 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1837 blockptr, 64); 1838 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1839 generation, 64); 1840 1841 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1842 { 1843 unsigned long ptr; 1844 ptr = offsetof(struct btrfs_node, ptrs) + 1845 sizeof(struct btrfs_key_ptr) * nr; 1846 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1847 } 1848 1849 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1850 int nr, u64 val) 1851 { 1852 unsigned long ptr; 1853 ptr = offsetof(struct btrfs_node, ptrs) + 1854 sizeof(struct btrfs_key_ptr) * nr; 1855 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1856 } 1857 1858 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1859 { 1860 unsigned long ptr; 1861 ptr = offsetof(struct btrfs_node, ptrs) + 1862 sizeof(struct btrfs_key_ptr) * nr; 1863 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1864 } 1865 1866 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1867 int nr, u64 val) 1868 { 1869 unsigned long ptr; 1870 ptr = offsetof(struct btrfs_node, ptrs) + 1871 sizeof(struct btrfs_key_ptr) * nr; 1872 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1873 } 1874 1875 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1876 { 1877 return offsetof(struct btrfs_node, ptrs) + 1878 sizeof(struct btrfs_key_ptr) * nr; 1879 } 1880 1881 void btrfs_node_key(const struct extent_buffer *eb, 1882 struct btrfs_disk_key *disk_key, int nr); 1883 1884 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1885 struct btrfs_disk_key *disk_key, int nr) 1886 { 1887 unsigned long ptr; 1888 ptr = btrfs_node_key_ptr_offset(nr); 1889 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1890 struct btrfs_key_ptr, key, disk_key); 1891 } 1892 1893 /* struct btrfs_item */ 1894 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1895 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1896 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1897 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1898 1899 static inline unsigned long btrfs_item_nr_offset(int nr) 1900 { 1901 return offsetof(struct btrfs_leaf, items) + 1902 sizeof(struct btrfs_item) * nr; 1903 } 1904 1905 static inline struct btrfs_item *btrfs_item_nr(int nr) 1906 { 1907 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1908 } 1909 1910 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1911 struct btrfs_item *item) 1912 { 1913 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1914 } 1915 1916 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1917 { 1918 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1919 } 1920 1921 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1922 { 1923 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1924 } 1925 1926 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1927 { 1928 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1929 } 1930 1931 static inline void btrfs_item_key(const struct extent_buffer *eb, 1932 struct btrfs_disk_key *disk_key, int nr) 1933 { 1934 struct btrfs_item *item = btrfs_item_nr(nr); 1935 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1936 } 1937 1938 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1939 struct btrfs_disk_key *disk_key, int nr) 1940 { 1941 struct btrfs_item *item = btrfs_item_nr(nr); 1942 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1943 } 1944 1945 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1946 1947 /* 1948 * struct btrfs_root_ref 1949 */ 1950 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1951 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1952 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1953 1954 /* struct btrfs_dir_item */ 1955 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1956 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1957 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1958 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1959 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1960 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1961 data_len, 16); 1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1963 name_len, 16); 1964 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1965 transid, 64); 1966 1967 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1968 const struct btrfs_dir_item *item, 1969 struct btrfs_disk_key *key) 1970 { 1971 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1972 } 1973 1974 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1975 struct btrfs_dir_item *item, 1976 const struct btrfs_disk_key *key) 1977 { 1978 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1979 } 1980 1981 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1982 num_entries, 64); 1983 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1984 num_bitmaps, 64); 1985 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1986 generation, 64); 1987 1988 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1989 const struct btrfs_free_space_header *h, 1990 struct btrfs_disk_key *key) 1991 { 1992 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1993 } 1994 1995 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1996 struct btrfs_free_space_header *h, 1997 const struct btrfs_disk_key *key) 1998 { 1999 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2000 } 2001 2002 /* struct btrfs_disk_key */ 2003 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2004 objectid, 64); 2005 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2006 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2007 2008 #ifdef __LITTLE_ENDIAN 2009 2010 /* 2011 * Optimized helpers for little-endian architectures where CPU and on-disk 2012 * structures have the same endianness and we can skip conversions. 2013 */ 2014 2015 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 2016 const struct btrfs_disk_key *disk_key) 2017 { 2018 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 2019 } 2020 2021 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 2022 const struct btrfs_key *cpu_key) 2023 { 2024 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 2025 } 2026 2027 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2028 struct btrfs_key *cpu_key, int nr) 2029 { 2030 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2031 2032 btrfs_node_key(eb, disk_key, nr); 2033 } 2034 2035 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2036 struct btrfs_key *cpu_key, int nr) 2037 { 2038 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2039 2040 btrfs_item_key(eb, disk_key, nr); 2041 } 2042 2043 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2044 const struct btrfs_dir_item *item, 2045 struct btrfs_key *cpu_key) 2046 { 2047 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2048 2049 btrfs_dir_item_key(eb, item, disk_key); 2050 } 2051 2052 #else 2053 2054 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2055 const struct btrfs_disk_key *disk) 2056 { 2057 cpu->offset = le64_to_cpu(disk->offset); 2058 cpu->type = disk->type; 2059 cpu->objectid = le64_to_cpu(disk->objectid); 2060 } 2061 2062 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2063 const struct btrfs_key *cpu) 2064 { 2065 disk->offset = cpu_to_le64(cpu->offset); 2066 disk->type = cpu->type; 2067 disk->objectid = cpu_to_le64(cpu->objectid); 2068 } 2069 2070 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2071 struct btrfs_key *key, int nr) 2072 { 2073 struct btrfs_disk_key disk_key; 2074 btrfs_node_key(eb, &disk_key, nr); 2075 btrfs_disk_key_to_cpu(key, &disk_key); 2076 } 2077 2078 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2079 struct btrfs_key *key, int nr) 2080 { 2081 struct btrfs_disk_key disk_key; 2082 btrfs_item_key(eb, &disk_key, nr); 2083 btrfs_disk_key_to_cpu(key, &disk_key); 2084 } 2085 2086 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2087 const struct btrfs_dir_item *item, 2088 struct btrfs_key *key) 2089 { 2090 struct btrfs_disk_key disk_key; 2091 btrfs_dir_item_key(eb, item, &disk_key); 2092 btrfs_disk_key_to_cpu(key, &disk_key); 2093 } 2094 2095 #endif 2096 2097 /* struct btrfs_header */ 2098 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2099 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2100 generation, 64); 2101 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2102 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2103 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2104 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2105 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2106 generation, 64); 2107 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2108 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2109 nritems, 32); 2110 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2111 2112 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2113 { 2114 return (btrfs_header_flags(eb) & flag) == flag; 2115 } 2116 2117 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2118 { 2119 u64 flags = btrfs_header_flags(eb); 2120 btrfs_set_header_flags(eb, flags | flag); 2121 } 2122 2123 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2124 { 2125 u64 flags = btrfs_header_flags(eb); 2126 btrfs_set_header_flags(eb, flags & ~flag); 2127 } 2128 2129 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2130 { 2131 u64 flags = btrfs_header_flags(eb); 2132 return flags >> BTRFS_BACKREF_REV_SHIFT; 2133 } 2134 2135 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2136 int rev) 2137 { 2138 u64 flags = btrfs_header_flags(eb); 2139 flags &= ~BTRFS_BACKREF_REV_MASK; 2140 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2141 btrfs_set_header_flags(eb, flags); 2142 } 2143 2144 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2145 { 2146 return btrfs_header_level(eb) == 0; 2147 } 2148 2149 /* struct btrfs_root_item */ 2150 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2151 generation, 64); 2152 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2153 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2154 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2155 2156 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2157 generation, 64); 2158 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2159 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8); 2160 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2161 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2162 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2163 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2164 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2165 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2166 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2167 last_snapshot, 64); 2168 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2169 generation_v2, 64); 2170 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2171 ctransid, 64); 2172 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2173 otransid, 64); 2174 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2175 stransid, 64); 2176 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2177 rtransid, 64); 2178 2179 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2180 { 2181 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2182 } 2183 2184 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2185 { 2186 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2187 } 2188 2189 /* struct btrfs_root_backup */ 2190 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2191 tree_root, 64); 2192 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2193 tree_root_gen, 64); 2194 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2195 tree_root_level, 8); 2196 2197 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2198 chunk_root, 64); 2199 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2200 chunk_root_gen, 64); 2201 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2202 chunk_root_level, 8); 2203 2204 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2205 extent_root, 64); 2206 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2207 extent_root_gen, 64); 2208 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2209 extent_root_level, 8); 2210 2211 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2212 fs_root, 64); 2213 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2214 fs_root_gen, 64); 2215 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2216 fs_root_level, 8); 2217 2218 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2219 dev_root, 64); 2220 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2221 dev_root_gen, 64); 2222 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2223 dev_root_level, 8); 2224 2225 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2226 csum_root, 64); 2227 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2228 csum_root_gen, 64); 2229 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2230 csum_root_level, 8); 2231 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2232 total_bytes, 64); 2233 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2234 bytes_used, 64); 2235 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2236 num_devices, 64); 2237 2238 /* struct btrfs_balance_item */ 2239 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2240 2241 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2242 const struct btrfs_balance_item *bi, 2243 struct btrfs_disk_balance_args *ba) 2244 { 2245 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2246 } 2247 2248 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2249 struct btrfs_balance_item *bi, 2250 const struct btrfs_disk_balance_args *ba) 2251 { 2252 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2253 } 2254 2255 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2256 const struct btrfs_balance_item *bi, 2257 struct btrfs_disk_balance_args *ba) 2258 { 2259 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2260 } 2261 2262 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2263 struct btrfs_balance_item *bi, 2264 const struct btrfs_disk_balance_args *ba) 2265 { 2266 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2267 } 2268 2269 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2270 const struct btrfs_balance_item *bi, 2271 struct btrfs_disk_balance_args *ba) 2272 { 2273 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2274 } 2275 2276 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2277 struct btrfs_balance_item *bi, 2278 const struct btrfs_disk_balance_args *ba) 2279 { 2280 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2281 } 2282 2283 static inline void 2284 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2285 const struct btrfs_disk_balance_args *disk) 2286 { 2287 memset(cpu, 0, sizeof(*cpu)); 2288 2289 cpu->profiles = le64_to_cpu(disk->profiles); 2290 cpu->usage = le64_to_cpu(disk->usage); 2291 cpu->devid = le64_to_cpu(disk->devid); 2292 cpu->pstart = le64_to_cpu(disk->pstart); 2293 cpu->pend = le64_to_cpu(disk->pend); 2294 cpu->vstart = le64_to_cpu(disk->vstart); 2295 cpu->vend = le64_to_cpu(disk->vend); 2296 cpu->target = le64_to_cpu(disk->target); 2297 cpu->flags = le64_to_cpu(disk->flags); 2298 cpu->limit = le64_to_cpu(disk->limit); 2299 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2300 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2301 } 2302 2303 static inline void 2304 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2305 const struct btrfs_balance_args *cpu) 2306 { 2307 memset(disk, 0, sizeof(*disk)); 2308 2309 disk->profiles = cpu_to_le64(cpu->profiles); 2310 disk->usage = cpu_to_le64(cpu->usage); 2311 disk->devid = cpu_to_le64(cpu->devid); 2312 disk->pstart = cpu_to_le64(cpu->pstart); 2313 disk->pend = cpu_to_le64(cpu->pend); 2314 disk->vstart = cpu_to_le64(cpu->vstart); 2315 disk->vend = cpu_to_le64(cpu->vend); 2316 disk->target = cpu_to_le64(cpu->target); 2317 disk->flags = cpu_to_le64(cpu->flags); 2318 disk->limit = cpu_to_le64(cpu->limit); 2319 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2320 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2321 } 2322 2323 /* struct btrfs_super_block */ 2324 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2325 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2326 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2327 generation, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2329 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2330 struct btrfs_super_block, sys_chunk_array_size, 32); 2331 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2332 struct btrfs_super_block, chunk_root_generation, 64); 2333 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2334 root_level, 8); 2335 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2336 chunk_root, 64); 2337 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2338 chunk_root_level, 8); 2339 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2340 log_root, 64); 2341 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2342 log_root_transid, 64); 2343 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2344 log_root_level, 8); 2345 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2346 total_bytes, 64); 2347 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2348 bytes_used, 64); 2349 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2350 sectorsize, 32); 2351 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2352 nodesize, 32); 2353 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2354 stripesize, 32); 2355 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2356 root_dir_objectid, 64); 2357 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2358 num_devices, 64); 2359 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2360 compat_flags, 64); 2361 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2362 compat_ro_flags, 64); 2363 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2364 incompat_flags, 64); 2365 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2366 csum_type, 16); 2367 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2368 cache_generation, 64); 2369 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2370 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2371 uuid_tree_generation, 64); 2372 2373 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2374 const char *btrfs_super_csum_name(u16 csum_type); 2375 const char *btrfs_super_csum_driver(u16 csum_type); 2376 size_t __attribute_const__ btrfs_get_num_csums(void); 2377 2378 2379 /* 2380 * The leaf data grows from end-to-front in the node. 2381 * this returns the address of the start of the last item, 2382 * which is the stop of the leaf data stack 2383 */ 2384 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2385 { 2386 u32 nr = btrfs_header_nritems(leaf); 2387 2388 if (nr == 0) 2389 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2390 return btrfs_item_offset_nr(leaf, nr - 1); 2391 } 2392 2393 /* struct btrfs_file_extent_item */ 2394 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2395 type, 8); 2396 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2397 struct btrfs_file_extent_item, disk_bytenr, 64); 2398 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2399 struct btrfs_file_extent_item, offset, 64); 2400 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2401 struct btrfs_file_extent_item, generation, 64); 2402 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2403 struct btrfs_file_extent_item, num_bytes, 64); 2404 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2405 struct btrfs_file_extent_item, ram_bytes, 64); 2406 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2407 struct btrfs_file_extent_item, disk_num_bytes, 64); 2408 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2409 struct btrfs_file_extent_item, compression, 8); 2410 2411 static inline unsigned long 2412 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2413 { 2414 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2415 } 2416 2417 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2418 { 2419 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2420 } 2421 2422 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2423 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2424 disk_bytenr, 64); 2425 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2426 generation, 64); 2427 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2428 disk_num_bytes, 64); 2429 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2430 offset, 64); 2431 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2432 num_bytes, 64); 2433 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2434 ram_bytes, 64); 2435 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2436 compression, 8); 2437 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2438 encryption, 8); 2439 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2440 other_encoding, 16); 2441 2442 /* 2443 * this returns the number of bytes used by the item on disk, minus the 2444 * size of any extent headers. If a file is compressed on disk, this is 2445 * the compressed size 2446 */ 2447 static inline u32 btrfs_file_extent_inline_item_len( 2448 const struct extent_buffer *eb, 2449 struct btrfs_item *e) 2450 { 2451 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2452 } 2453 2454 /* btrfs_qgroup_status_item */ 2455 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2456 generation, 64); 2457 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2458 version, 64); 2459 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2460 flags, 64); 2461 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2462 rescan, 64); 2463 2464 /* btrfs_qgroup_info_item */ 2465 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2466 generation, 64); 2467 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2468 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2469 rfer_cmpr, 64); 2470 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2471 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2472 excl_cmpr, 64); 2473 2474 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2475 struct btrfs_qgroup_info_item, generation, 64); 2476 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2477 rfer, 64); 2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2479 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2480 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2481 excl, 64); 2482 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2483 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2484 2485 /* btrfs_qgroup_limit_item */ 2486 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2487 flags, 64); 2488 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2489 max_rfer, 64); 2490 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2491 max_excl, 64); 2492 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2493 rsv_rfer, 64); 2494 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2495 rsv_excl, 64); 2496 2497 /* btrfs_dev_replace_item */ 2498 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2499 struct btrfs_dev_replace_item, src_devid, 64); 2500 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2501 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2502 64); 2503 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2504 replace_state, 64); 2505 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2506 time_started, 64); 2507 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2508 time_stopped, 64); 2509 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2510 num_write_errors, 64); 2511 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2512 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2513 64); 2514 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2515 cursor_left, 64); 2516 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2517 cursor_right, 64); 2518 2519 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2520 struct btrfs_dev_replace_item, src_devid, 64); 2521 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2522 struct btrfs_dev_replace_item, 2523 cont_reading_from_srcdev_mode, 64); 2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2525 struct btrfs_dev_replace_item, replace_state, 64); 2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2527 struct btrfs_dev_replace_item, time_started, 64); 2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2529 struct btrfs_dev_replace_item, time_stopped, 64); 2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2531 struct btrfs_dev_replace_item, num_write_errors, 64); 2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2533 struct btrfs_dev_replace_item, 2534 num_uncorrectable_read_errors, 64); 2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2536 struct btrfs_dev_replace_item, cursor_left, 64); 2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2538 struct btrfs_dev_replace_item, cursor_right, 64); 2539 2540 /* helper function to cast into the data area of the leaf. */ 2541 #define btrfs_item_ptr(leaf, slot, type) \ 2542 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2543 btrfs_item_offset_nr(leaf, slot))) 2544 2545 #define btrfs_item_ptr_offset(leaf, slot) \ 2546 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2547 btrfs_item_offset_nr(leaf, slot))) 2548 2549 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2550 { 2551 return crc32c(crc, address, length); 2552 } 2553 2554 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2555 { 2556 put_unaligned_le32(~crc, result); 2557 } 2558 2559 static inline u64 btrfs_name_hash(const char *name, int len) 2560 { 2561 return crc32c((u32)~1, name, len); 2562 } 2563 2564 /* 2565 * Figure the key offset of an extended inode ref 2566 */ 2567 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2568 int len) 2569 { 2570 return (u64) crc32c(parent_objectid, name, len); 2571 } 2572 2573 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2574 { 2575 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2576 } 2577 2578 /* extent-tree.c */ 2579 2580 enum btrfs_inline_ref_type { 2581 BTRFS_REF_TYPE_INVALID, 2582 BTRFS_REF_TYPE_BLOCK, 2583 BTRFS_REF_TYPE_DATA, 2584 BTRFS_REF_TYPE_ANY, 2585 }; 2586 2587 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2588 struct btrfs_extent_inline_ref *iref, 2589 enum btrfs_inline_ref_type is_data); 2590 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2591 2592 /* 2593 * Take the number of bytes to be checksummmed and figure out how many leaves 2594 * it would require to store the csums for that many bytes. 2595 */ 2596 static inline u64 btrfs_csum_bytes_to_leaves( 2597 const struct btrfs_fs_info *fs_info, u64 csum_bytes) 2598 { 2599 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits; 2600 2601 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf); 2602 } 2603 2604 /* 2605 * Use this if we would be adding new items, as we could split nodes as we cow 2606 * down the tree. 2607 */ 2608 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2609 unsigned num_items) 2610 { 2611 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2612 } 2613 2614 /* 2615 * Doing a truncate or a modification won't result in new nodes or leaves, just 2616 * what we need for COW. 2617 */ 2618 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2619 unsigned num_items) 2620 { 2621 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2622 } 2623 2624 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2625 u64 start, u64 num_bytes); 2626 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2627 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2628 unsigned long count); 2629 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2630 struct btrfs_delayed_ref_root *delayed_refs, 2631 struct btrfs_delayed_ref_head *head); 2632 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2633 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2634 struct btrfs_fs_info *fs_info, u64 bytenr, 2635 u64 offset, int metadata, u64 *refs, u64 *flags); 2636 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2637 int reserved); 2638 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2639 u64 bytenr, u64 num_bytes); 2640 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2641 int btrfs_cross_ref_exist(struct btrfs_root *root, 2642 u64 objectid, u64 offset, u64 bytenr, bool strict); 2643 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2644 struct btrfs_root *root, 2645 u64 parent, u64 root_objectid, 2646 const struct btrfs_disk_key *key, 2647 int level, u64 hint, 2648 u64 empty_size, 2649 enum btrfs_lock_nesting nest); 2650 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2651 struct btrfs_root *root, 2652 struct extent_buffer *buf, 2653 u64 parent, int last_ref); 2654 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2655 struct btrfs_root *root, u64 owner, 2656 u64 offset, u64 ram_bytes, 2657 struct btrfs_key *ins); 2658 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2659 u64 root_objectid, u64 owner, u64 offset, 2660 struct btrfs_key *ins); 2661 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2662 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2663 struct btrfs_key *ins, int is_data, int delalloc); 2664 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2665 struct extent_buffer *buf, int full_backref); 2666 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2667 struct extent_buffer *buf, int full_backref); 2668 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2669 struct extent_buffer *eb, u64 flags, 2670 int level, int is_data); 2671 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2672 2673 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2674 u64 start, u64 len, int delalloc); 2675 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2676 u64 len); 2677 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2678 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2679 struct btrfs_ref *generic_ref); 2680 2681 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2682 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2683 2684 /* 2685 * Different levels for to flush space when doing space reservations. 2686 * 2687 * The higher the level, the more methods we try to reclaim space. 2688 */ 2689 enum btrfs_reserve_flush_enum { 2690 /* If we are in the transaction, we can't flush anything.*/ 2691 BTRFS_RESERVE_NO_FLUSH, 2692 2693 /* 2694 * Flush space by: 2695 * - Running delayed inode items 2696 * - Allocating a new chunk 2697 */ 2698 BTRFS_RESERVE_FLUSH_LIMIT, 2699 2700 /* 2701 * Flush space by: 2702 * - Running delayed inode items 2703 * - Running delayed refs 2704 * - Running delalloc and waiting for ordered extents 2705 * - Allocating a new chunk 2706 */ 2707 BTRFS_RESERVE_FLUSH_EVICT, 2708 2709 /* 2710 * Flush space by above mentioned methods and by: 2711 * - Running delayed iputs 2712 * - Commiting transaction 2713 * 2714 * Can be interruped by fatal signal. 2715 */ 2716 BTRFS_RESERVE_FLUSH_DATA, 2717 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2718 BTRFS_RESERVE_FLUSH_ALL, 2719 2720 /* 2721 * Pretty much the same as FLUSH_ALL, but can also steal space from 2722 * global rsv. 2723 * 2724 * Can be interruped by fatal signal. 2725 */ 2726 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2727 }; 2728 2729 enum btrfs_flush_state { 2730 FLUSH_DELAYED_ITEMS_NR = 1, 2731 FLUSH_DELAYED_ITEMS = 2, 2732 FLUSH_DELAYED_REFS_NR = 3, 2733 FLUSH_DELAYED_REFS = 4, 2734 FLUSH_DELALLOC = 5, 2735 FLUSH_DELALLOC_WAIT = 6, 2736 ALLOC_CHUNK = 7, 2737 ALLOC_CHUNK_FORCE = 8, 2738 RUN_DELAYED_IPUTS = 9, 2739 COMMIT_TRANS = 10, 2740 }; 2741 2742 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2743 struct btrfs_block_rsv *rsv, 2744 int nitems, bool use_global_rsv); 2745 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2746 struct btrfs_block_rsv *rsv); 2747 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2748 2749 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2750 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2751 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2752 u64 start, u64 end); 2753 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2754 u64 num_bytes, u64 *actual_bytes); 2755 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2756 2757 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2758 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2759 struct btrfs_fs_info *fs_info); 2760 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2761 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2762 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2763 2764 /* ctree.c */ 2765 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2766 int *slot); 2767 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2768 int btrfs_previous_item(struct btrfs_root *root, 2769 struct btrfs_path *path, u64 min_objectid, 2770 int type); 2771 int btrfs_previous_extent_item(struct btrfs_root *root, 2772 struct btrfs_path *path, u64 min_objectid); 2773 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2774 struct btrfs_path *path, 2775 const struct btrfs_key *new_key); 2776 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2777 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2778 struct btrfs_key *key, int lowest_level, 2779 u64 min_trans); 2780 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2781 struct btrfs_path *path, 2782 u64 min_trans); 2783 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2784 int slot); 2785 2786 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2787 struct btrfs_root *root, struct extent_buffer *buf, 2788 struct extent_buffer *parent, int parent_slot, 2789 struct extent_buffer **cow_ret, 2790 enum btrfs_lock_nesting nest); 2791 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2792 struct btrfs_root *root, 2793 struct extent_buffer *buf, 2794 struct extent_buffer **cow_ret, u64 new_root_objectid); 2795 int btrfs_block_can_be_shared(struct btrfs_root *root, 2796 struct extent_buffer *buf); 2797 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2798 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2799 int btrfs_split_item(struct btrfs_trans_handle *trans, 2800 struct btrfs_root *root, 2801 struct btrfs_path *path, 2802 const struct btrfs_key *new_key, 2803 unsigned long split_offset); 2804 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2805 struct btrfs_root *root, 2806 struct btrfs_path *path, 2807 const struct btrfs_key *new_key); 2808 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2809 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2810 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2811 const struct btrfs_key *key, struct btrfs_path *p, 2812 int ins_len, int cow); 2813 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2814 struct btrfs_path *p, u64 time_seq); 2815 int btrfs_search_slot_for_read(struct btrfs_root *root, 2816 const struct btrfs_key *key, 2817 struct btrfs_path *p, int find_higher, 2818 int return_any); 2819 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2820 struct btrfs_root *root, struct extent_buffer *parent, 2821 int start_slot, u64 *last_ret, 2822 struct btrfs_key *progress); 2823 void btrfs_release_path(struct btrfs_path *p); 2824 struct btrfs_path *btrfs_alloc_path(void); 2825 void btrfs_free_path(struct btrfs_path *p); 2826 2827 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2828 struct btrfs_path *path, int slot, int nr); 2829 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2830 struct btrfs_root *root, 2831 struct btrfs_path *path) 2832 { 2833 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2834 } 2835 2836 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2837 const struct btrfs_key *cpu_key, u32 *data_size, 2838 int nr); 2839 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2840 const struct btrfs_key *key, void *data, u32 data_size); 2841 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2842 struct btrfs_root *root, 2843 struct btrfs_path *path, 2844 const struct btrfs_key *cpu_key, u32 *data_size, 2845 int nr); 2846 2847 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2848 struct btrfs_root *root, 2849 struct btrfs_path *path, 2850 const struct btrfs_key *key, 2851 u32 data_size) 2852 { 2853 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2854 } 2855 2856 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2857 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2858 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2859 u64 time_seq); 2860 static inline int btrfs_next_old_item(struct btrfs_root *root, 2861 struct btrfs_path *p, u64 time_seq) 2862 { 2863 ++p->slots[0]; 2864 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2865 return btrfs_next_old_leaf(root, p, time_seq); 2866 return 0; 2867 } 2868 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2869 { 2870 return btrfs_next_old_item(root, p, 0); 2871 } 2872 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2873 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2874 int for_reloc); 2875 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2876 struct btrfs_root *root, 2877 struct extent_buffer *node, 2878 struct extent_buffer *parent); 2879 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2880 { 2881 /* 2882 * Do it this way so we only ever do one test_bit in the normal case. 2883 */ 2884 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2885 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2886 return 2; 2887 return 1; 2888 } 2889 return 0; 2890 } 2891 2892 /* 2893 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2894 * anything except sleeping. This function is used to check the status of 2895 * the fs. 2896 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount, 2897 * since setting and checking for SB_RDONLY in the superblock's flags is not 2898 * atomic. 2899 */ 2900 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2901 { 2902 return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) || 2903 btrfs_fs_closing(fs_info); 2904 } 2905 2906 static inline void btrfs_set_sb_rdonly(struct super_block *sb) 2907 { 2908 sb->s_flags |= SB_RDONLY; 2909 set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state); 2910 } 2911 2912 static inline void btrfs_clear_sb_rdonly(struct super_block *sb) 2913 { 2914 sb->s_flags &= ~SB_RDONLY; 2915 clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state); 2916 } 2917 2918 /* tree mod log functions from ctree.c */ 2919 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2920 struct seq_list *elem); 2921 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2922 struct seq_list *elem); 2923 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2924 2925 /* root-item.c */ 2926 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2927 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2928 int name_len); 2929 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2930 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2931 int name_len); 2932 int btrfs_del_root(struct btrfs_trans_handle *trans, 2933 const struct btrfs_key *key); 2934 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2935 const struct btrfs_key *key, 2936 struct btrfs_root_item *item); 2937 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2938 struct btrfs_root *root, 2939 struct btrfs_key *key, 2940 struct btrfs_root_item *item); 2941 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2942 struct btrfs_path *path, struct btrfs_root_item *root_item, 2943 struct btrfs_key *root_key); 2944 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2945 void btrfs_set_root_node(struct btrfs_root_item *item, 2946 struct extent_buffer *node); 2947 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2948 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2949 struct btrfs_root *root); 2950 2951 /* uuid-tree.c */ 2952 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2953 u64 subid); 2954 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2955 u64 subid); 2956 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2957 2958 /* dir-item.c */ 2959 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2960 const char *name, int name_len); 2961 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2962 int name_len, struct btrfs_inode *dir, 2963 struct btrfs_key *location, u8 type, u64 index); 2964 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2965 struct btrfs_root *root, 2966 struct btrfs_path *path, u64 dir, 2967 const char *name, int name_len, 2968 int mod); 2969 struct btrfs_dir_item * 2970 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2971 struct btrfs_root *root, 2972 struct btrfs_path *path, u64 dir, 2973 u64 objectid, const char *name, int name_len, 2974 int mod); 2975 struct btrfs_dir_item * 2976 btrfs_search_dir_index_item(struct btrfs_root *root, 2977 struct btrfs_path *path, u64 dirid, 2978 const char *name, int name_len); 2979 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2980 struct btrfs_root *root, 2981 struct btrfs_path *path, 2982 struct btrfs_dir_item *di); 2983 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2984 struct btrfs_root *root, 2985 struct btrfs_path *path, u64 objectid, 2986 const char *name, u16 name_len, 2987 const void *data, u16 data_len); 2988 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2989 struct btrfs_root *root, 2990 struct btrfs_path *path, u64 dir, 2991 const char *name, u16 name_len, 2992 int mod); 2993 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2994 struct btrfs_path *path, 2995 const char *name, 2996 int name_len); 2997 2998 /* orphan.c */ 2999 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3000 struct btrfs_root *root, u64 offset); 3001 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3002 struct btrfs_root *root, u64 offset); 3003 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3004 3005 /* inode-item.c */ 3006 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3007 struct btrfs_root *root, 3008 const char *name, int name_len, 3009 u64 inode_objectid, u64 ref_objectid, u64 index); 3010 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3011 struct btrfs_root *root, 3012 const char *name, int name_len, 3013 u64 inode_objectid, u64 ref_objectid, u64 *index); 3014 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3015 struct btrfs_root *root, 3016 struct btrfs_path *path, u64 objectid); 3017 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3018 *root, struct btrfs_path *path, 3019 struct btrfs_key *location, int mod); 3020 3021 struct btrfs_inode_extref * 3022 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3023 struct btrfs_root *root, 3024 struct btrfs_path *path, 3025 const char *name, int name_len, 3026 u64 inode_objectid, u64 ref_objectid, int ins_len, 3027 int cow); 3028 3029 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 3030 int slot, const char *name, 3031 int name_len); 3032 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 3033 struct extent_buffer *leaf, int slot, u64 ref_objectid, 3034 const char *name, int name_len); 3035 /* file-item.c */ 3036 struct btrfs_dio_private; 3037 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3038 struct btrfs_root *root, u64 bytenr, u64 len); 3039 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst); 3040 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3041 struct btrfs_root *root, 3042 u64 objectid, u64 pos, 3043 u64 disk_offset, u64 disk_num_bytes, 3044 u64 num_bytes, u64 offset, u64 ram_bytes, 3045 u8 compression, u8 encryption, u16 other_encoding); 3046 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3047 struct btrfs_root *root, 3048 struct btrfs_path *path, u64 objectid, 3049 u64 bytenr, int mod); 3050 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3051 struct btrfs_root *root, 3052 struct btrfs_ordered_sum *sums); 3053 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 3054 u64 file_start, int contig); 3055 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3056 struct list_head *list, int search_commit); 3057 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3058 const struct btrfs_path *path, 3059 struct btrfs_file_extent_item *fi, 3060 const bool new_inline, 3061 struct extent_map *em); 3062 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 3063 u64 len); 3064 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 3065 u64 len); 3066 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); 3067 u64 btrfs_file_extent_end(const struct btrfs_path *path); 3068 3069 /* inode.c */ 3070 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 3071 int mirror_num, unsigned long bio_flags); 3072 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset, 3073 struct page *page, u64 start, u64 end, int mirror); 3074 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3075 u64 start, u64 len); 3076 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3077 u64 *orig_start, u64 *orig_block_len, 3078 u64 *ram_bytes, bool strict); 3079 3080 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3081 struct btrfs_inode *inode); 3082 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3083 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3084 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3085 struct btrfs_root *root, 3086 struct btrfs_inode *dir, struct btrfs_inode *inode, 3087 const char *name, int name_len); 3088 int btrfs_add_link(struct btrfs_trans_handle *trans, 3089 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3090 const char *name, int name_len, int add_backref, u64 index); 3091 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3092 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, 3093 int front); 3094 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3095 struct btrfs_root *root, 3096 struct btrfs_inode *inode, u64 new_size, 3097 u32 min_type); 3098 3099 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3100 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr, 3101 bool in_reclaim_context); 3102 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3103 unsigned int extra_bits, 3104 struct extent_state **cached_state); 3105 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3106 struct btrfs_root *new_root, 3107 struct btrfs_root *parent_root, 3108 u64 new_dirid); 3109 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3110 unsigned *bits); 3111 void btrfs_clear_delalloc_extent(struct inode *inode, 3112 struct extent_state *state, unsigned *bits); 3113 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3114 struct extent_state *other); 3115 void btrfs_split_delalloc_extent(struct inode *inode, 3116 struct extent_state *orig, u64 split); 3117 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3118 unsigned long bio_flags); 3119 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3120 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3121 int btrfs_readpage(struct file *file, struct page *page); 3122 void btrfs_evict_inode(struct inode *inode); 3123 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3124 struct inode *btrfs_alloc_inode(struct super_block *sb); 3125 void btrfs_destroy_inode(struct inode *inode); 3126 void btrfs_free_inode(struct inode *inode); 3127 int btrfs_drop_inode(struct inode *inode); 3128 int __init btrfs_init_cachep(void); 3129 void __cold btrfs_destroy_cachep(void); 3130 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3131 struct btrfs_root *root, struct btrfs_path *path); 3132 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3133 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3134 struct page *page, size_t pg_offset, 3135 u64 start, u64 end); 3136 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3137 struct btrfs_root *root, struct btrfs_inode *inode); 3138 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3139 struct btrfs_root *root, struct btrfs_inode *inode); 3140 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3141 struct btrfs_inode *inode); 3142 int btrfs_orphan_cleanup(struct btrfs_root *root); 3143 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); 3144 void btrfs_add_delayed_iput(struct inode *inode); 3145 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3146 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3147 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3148 u64 start, u64 num_bytes, u64 min_size, 3149 loff_t actual_len, u64 *alloc_hint); 3150 int btrfs_prealloc_file_range_trans(struct inode *inode, 3151 struct btrfs_trans_handle *trans, int mode, 3152 u64 start, u64 num_bytes, u64 min_size, 3153 loff_t actual_len, u64 *alloc_hint); 3154 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3155 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3156 struct writeback_control *wbc); 3157 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3158 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3159 u64 end, int uptodate); 3160 extern const struct dentry_operations btrfs_dentry_operations; 3161 extern const struct iomap_ops btrfs_dio_iomap_ops; 3162 extern const struct iomap_dio_ops btrfs_dio_ops; 3163 3164 /* Inode locking type flags, by default the exclusive lock is taken */ 3165 #define BTRFS_ILOCK_SHARED (1U << 0) 3166 #define BTRFS_ILOCK_TRY (1U << 1) 3167 3168 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); 3169 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); 3170 void btrfs_update_inode_bytes(struct btrfs_inode *inode, 3171 const u64 add_bytes, 3172 const u64 del_bytes); 3173 3174 /* ioctl.c */ 3175 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3176 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3177 int btrfs_ioctl_get_supported_features(void __user *arg); 3178 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3179 int __pure btrfs_is_empty_uuid(u8 *uuid); 3180 int btrfs_defrag_file(struct inode *inode, struct file *file, 3181 struct btrfs_ioctl_defrag_range_args *range, 3182 u64 newer_than, unsigned long max_pages); 3183 void btrfs_get_block_group_info(struct list_head *groups_list, 3184 struct btrfs_ioctl_space_info *space); 3185 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3186 struct btrfs_ioctl_balance_args *bargs); 3187 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3188 enum btrfs_exclusive_operation type); 3189 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3190 3191 /* file.c */ 3192 int __init btrfs_auto_defrag_init(void); 3193 void __cold btrfs_auto_defrag_exit(void); 3194 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3195 struct btrfs_inode *inode); 3196 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3197 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3198 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3199 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3200 int skip_pinned); 3201 extern const struct file_operations btrfs_file_operations; 3202 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3203 struct btrfs_root *root, struct btrfs_inode *inode, 3204 struct btrfs_drop_extents_args *args); 3205 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path, 3206 const u64 start, const u64 end, 3207 struct btrfs_replace_extent_info *extent_info, 3208 struct btrfs_trans_handle **trans_out); 3209 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3210 struct btrfs_inode *inode, u64 start, u64 end); 3211 int btrfs_release_file(struct inode *inode, struct file *file); 3212 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3213 size_t num_pages, loff_t pos, size_t write_bytes, 3214 struct extent_state **cached, bool noreserve); 3215 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3216 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3217 size_t *write_bytes); 3218 void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3219 3220 /* tree-defrag.c */ 3221 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3222 struct btrfs_root *root); 3223 3224 /* super.c */ 3225 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3226 unsigned long new_flags); 3227 int btrfs_sync_fs(struct super_block *sb, int wait); 3228 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3229 u64 subvol_objectid); 3230 3231 static inline __printf(2, 3) __cold 3232 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3233 { 3234 } 3235 3236 #ifdef CONFIG_PRINTK 3237 __printf(2, 3) 3238 __cold 3239 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3240 #else 3241 #define btrfs_printk(fs_info, fmt, args...) \ 3242 btrfs_no_printk(fs_info, fmt, ##args) 3243 #endif 3244 3245 #define btrfs_emerg(fs_info, fmt, args...) \ 3246 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3247 #define btrfs_alert(fs_info, fmt, args...) \ 3248 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3249 #define btrfs_crit(fs_info, fmt, args...) \ 3250 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3251 #define btrfs_err(fs_info, fmt, args...) \ 3252 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3253 #define btrfs_warn(fs_info, fmt, args...) \ 3254 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3255 #define btrfs_notice(fs_info, fmt, args...) \ 3256 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3257 #define btrfs_info(fs_info, fmt, args...) \ 3258 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3259 3260 /* 3261 * Wrappers that use printk_in_rcu 3262 */ 3263 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3264 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3265 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3266 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3267 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3268 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3269 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3270 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3271 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3272 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3273 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3274 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3275 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3276 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3277 3278 /* 3279 * Wrappers that use a ratelimited printk_in_rcu 3280 */ 3281 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3282 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3283 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3284 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3285 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3286 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3287 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3288 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3289 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3290 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3291 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3292 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3293 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3294 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3295 3296 /* 3297 * Wrappers that use a ratelimited printk 3298 */ 3299 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3300 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3301 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3302 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3303 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3304 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3305 #define btrfs_err_rl(fs_info, fmt, args...) \ 3306 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3307 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3308 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3309 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3310 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3311 #define btrfs_info_rl(fs_info, fmt, args...) \ 3312 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3313 3314 #if defined(CONFIG_DYNAMIC_DEBUG) 3315 #define btrfs_debug(fs_info, fmt, args...) \ 3316 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3317 fs_info, KERN_DEBUG fmt, ##args) 3318 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3319 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3320 fs_info, KERN_DEBUG fmt, ##args) 3321 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3322 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3323 fs_info, KERN_DEBUG fmt, ##args) 3324 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3325 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3326 fs_info, KERN_DEBUG fmt, ##args) 3327 #elif defined(DEBUG) 3328 #define btrfs_debug(fs_info, fmt, args...) \ 3329 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3330 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3331 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3332 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3333 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3334 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3335 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3336 #else 3337 #define btrfs_debug(fs_info, fmt, args...) \ 3338 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3339 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3340 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3341 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3342 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3343 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3344 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3345 #endif 3346 3347 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3348 do { \ 3349 rcu_read_lock(); \ 3350 btrfs_printk(fs_info, fmt, ##args); \ 3351 rcu_read_unlock(); \ 3352 } while (0) 3353 3354 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3355 do { \ 3356 rcu_read_lock(); \ 3357 btrfs_no_printk(fs_info, fmt, ##args); \ 3358 rcu_read_unlock(); \ 3359 } while (0) 3360 3361 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3362 do { \ 3363 static DEFINE_RATELIMIT_STATE(_rs, \ 3364 DEFAULT_RATELIMIT_INTERVAL, \ 3365 DEFAULT_RATELIMIT_BURST); \ 3366 if (__ratelimit(&_rs)) \ 3367 btrfs_printk(fs_info, fmt, ##args); \ 3368 } while (0) 3369 3370 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3371 do { \ 3372 rcu_read_lock(); \ 3373 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3374 rcu_read_unlock(); \ 3375 } while (0) 3376 3377 #ifdef CONFIG_BTRFS_ASSERT 3378 __cold __noreturn 3379 static inline void assertfail(const char *expr, const char *file, int line) 3380 { 3381 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3382 BUG(); 3383 } 3384 3385 #define ASSERT(expr) \ 3386 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3387 3388 #else 3389 static inline void assertfail(const char *expr, const char* file, int line) { } 3390 #define ASSERT(expr) (void)(expr) 3391 #endif 3392 3393 /* 3394 * Get the correct offset inside the page of extent buffer. 3395 * 3396 * @eb: target extent buffer 3397 * @start: offset inside the extent buffer 3398 * 3399 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases. 3400 */ 3401 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb, 3402 unsigned long offset) 3403 { 3404 /* 3405 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned 3406 * to PAGE_SIZE, thus adding it won't cause any difference. 3407 * 3408 * For sectorsize < PAGE_SIZE, we must only read the data that belongs 3409 * to the eb, thus we have to take the eb->start into consideration. 3410 */ 3411 return offset_in_page(offset + eb->start); 3412 } 3413 3414 static inline unsigned long get_eb_page_index(unsigned long offset) 3415 { 3416 /* 3417 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough. 3418 * 3419 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE, 3420 * and have ensured that all tree blocks are contained in one page, 3421 * thus we always get index == 0. 3422 */ 3423 return offset >> PAGE_SHIFT; 3424 } 3425 3426 /* 3427 * Use that for functions that are conditionally exported for sanity tests but 3428 * otherwise static 3429 */ 3430 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3431 #define EXPORT_FOR_TESTS static 3432 #else 3433 #define EXPORT_FOR_TESTS 3434 #endif 3435 3436 __cold 3437 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3438 { 3439 btrfs_err(fs_info, 3440 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3441 } 3442 3443 __printf(5, 6) 3444 __cold 3445 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3446 unsigned int line, int errno, const char *fmt, ...); 3447 3448 const char * __attribute_const__ btrfs_decode_error(int errno); 3449 3450 __cold 3451 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3452 const char *function, 3453 unsigned int line, int errno); 3454 3455 /* 3456 * Call btrfs_abort_transaction as early as possible when an error condition is 3457 * detected, that way the exact line number is reported. 3458 */ 3459 #define btrfs_abort_transaction(trans, errno) \ 3460 do { \ 3461 /* Report first abort since mount */ \ 3462 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3463 &((trans)->fs_info->fs_state))) { \ 3464 if ((errno) != -EIO && (errno) != -EROFS) { \ 3465 WARN(1, KERN_DEBUG \ 3466 "BTRFS: Transaction aborted (error %d)\n", \ 3467 (errno)); \ 3468 } else { \ 3469 btrfs_debug((trans)->fs_info, \ 3470 "Transaction aborted (error %d)", \ 3471 (errno)); \ 3472 } \ 3473 } \ 3474 __btrfs_abort_transaction((trans), __func__, \ 3475 __LINE__, (errno)); \ 3476 } while (0) 3477 3478 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3479 do { \ 3480 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3481 (errno), fmt, ##args); \ 3482 } while (0) 3483 3484 __printf(5, 6) 3485 __cold 3486 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3487 unsigned int line, int errno, const char *fmt, ...); 3488 /* 3489 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3490 * will panic(). Otherwise we BUG() here. 3491 */ 3492 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3493 do { \ 3494 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3495 BUG(); \ 3496 } while (0) 3497 3498 3499 /* compatibility and incompatibility defines */ 3500 3501 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3502 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3503 #opt) 3504 3505 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3506 u64 flag, const char* name) 3507 { 3508 struct btrfs_super_block *disk_super; 3509 u64 features; 3510 3511 disk_super = fs_info->super_copy; 3512 features = btrfs_super_incompat_flags(disk_super); 3513 if (!(features & flag)) { 3514 spin_lock(&fs_info->super_lock); 3515 features = btrfs_super_incompat_flags(disk_super); 3516 if (!(features & flag)) { 3517 features |= flag; 3518 btrfs_set_super_incompat_flags(disk_super, features); 3519 btrfs_info(fs_info, 3520 "setting incompat feature flag for %s (0x%llx)", 3521 name, flag); 3522 } 3523 spin_unlock(&fs_info->super_lock); 3524 } 3525 } 3526 3527 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3528 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3529 #opt) 3530 3531 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3532 u64 flag, const char* name) 3533 { 3534 struct btrfs_super_block *disk_super; 3535 u64 features; 3536 3537 disk_super = fs_info->super_copy; 3538 features = btrfs_super_incompat_flags(disk_super); 3539 if (features & flag) { 3540 spin_lock(&fs_info->super_lock); 3541 features = btrfs_super_incompat_flags(disk_super); 3542 if (features & flag) { 3543 features &= ~flag; 3544 btrfs_set_super_incompat_flags(disk_super, features); 3545 btrfs_info(fs_info, 3546 "clearing incompat feature flag for %s (0x%llx)", 3547 name, flag); 3548 } 3549 spin_unlock(&fs_info->super_lock); 3550 } 3551 } 3552 3553 #define btrfs_fs_incompat(fs_info, opt) \ 3554 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3555 3556 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3557 { 3558 struct btrfs_super_block *disk_super; 3559 disk_super = fs_info->super_copy; 3560 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3561 } 3562 3563 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3564 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3565 #opt) 3566 3567 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3568 u64 flag, const char *name) 3569 { 3570 struct btrfs_super_block *disk_super; 3571 u64 features; 3572 3573 disk_super = fs_info->super_copy; 3574 features = btrfs_super_compat_ro_flags(disk_super); 3575 if (!(features & flag)) { 3576 spin_lock(&fs_info->super_lock); 3577 features = btrfs_super_compat_ro_flags(disk_super); 3578 if (!(features & flag)) { 3579 features |= flag; 3580 btrfs_set_super_compat_ro_flags(disk_super, features); 3581 btrfs_info(fs_info, 3582 "setting compat-ro feature flag for %s (0x%llx)", 3583 name, flag); 3584 } 3585 spin_unlock(&fs_info->super_lock); 3586 } 3587 } 3588 3589 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3590 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3591 #opt) 3592 3593 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3594 u64 flag, const char *name) 3595 { 3596 struct btrfs_super_block *disk_super; 3597 u64 features; 3598 3599 disk_super = fs_info->super_copy; 3600 features = btrfs_super_compat_ro_flags(disk_super); 3601 if (features & flag) { 3602 spin_lock(&fs_info->super_lock); 3603 features = btrfs_super_compat_ro_flags(disk_super); 3604 if (features & flag) { 3605 features &= ~flag; 3606 btrfs_set_super_compat_ro_flags(disk_super, features); 3607 btrfs_info(fs_info, 3608 "clearing compat-ro feature flag for %s (0x%llx)", 3609 name, flag); 3610 } 3611 spin_unlock(&fs_info->super_lock); 3612 } 3613 } 3614 3615 #define btrfs_fs_compat_ro(fs_info, opt) \ 3616 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3617 3618 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3619 { 3620 struct btrfs_super_block *disk_super; 3621 disk_super = fs_info->super_copy; 3622 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3623 } 3624 3625 /* acl.c */ 3626 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3627 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3628 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3629 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3630 struct inode *inode, struct inode *dir); 3631 #else 3632 #define btrfs_get_acl NULL 3633 #define btrfs_set_acl NULL 3634 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3635 struct inode *inode, struct inode *dir) 3636 { 3637 return 0; 3638 } 3639 #endif 3640 3641 /* relocation.c */ 3642 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3643 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3644 struct btrfs_root *root); 3645 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3646 struct btrfs_root *root); 3647 int btrfs_recover_relocation(struct btrfs_root *root); 3648 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3649 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3650 struct btrfs_root *root, struct extent_buffer *buf, 3651 struct extent_buffer *cow); 3652 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3653 u64 *bytes_to_reserve); 3654 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3655 struct btrfs_pending_snapshot *pending); 3656 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3657 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3658 u64 bytenr); 3659 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3660 3661 /* scrub.c */ 3662 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3663 u64 end, struct btrfs_scrub_progress *progress, 3664 int readonly, int is_dev_replace); 3665 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3666 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3667 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3668 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3669 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3670 struct btrfs_scrub_progress *progress); 3671 static inline void btrfs_init_full_stripe_locks_tree( 3672 struct btrfs_full_stripe_locks_tree *locks_root) 3673 { 3674 locks_root->root = RB_ROOT; 3675 mutex_init(&locks_root->lock); 3676 } 3677 3678 /* dev-replace.c */ 3679 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3680 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3681 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3682 3683 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3684 { 3685 btrfs_bio_counter_sub(fs_info, 1); 3686 } 3687 3688 /* reada.c */ 3689 struct reada_control { 3690 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3691 struct btrfs_key key_start; 3692 struct btrfs_key key_end; /* exclusive */ 3693 atomic_t elems; 3694 struct kref refcnt; 3695 wait_queue_head_t wait; 3696 }; 3697 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3698 struct btrfs_key *start, struct btrfs_key *end); 3699 int btrfs_reada_wait(void *handle); 3700 void btrfs_reada_detach(void *handle); 3701 int btree_readahead_hook(struct extent_buffer *eb, int err); 3702 void btrfs_reada_remove_dev(struct btrfs_device *dev); 3703 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3704 3705 static inline int is_fstree(u64 rootid) 3706 { 3707 if (rootid == BTRFS_FS_TREE_OBJECTID || 3708 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3709 !btrfs_qgroup_level(rootid))) 3710 return 1; 3711 return 0; 3712 } 3713 3714 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3715 { 3716 return signal_pending(current); 3717 } 3718 3719 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3720 3721 /* Sanity test specific functions */ 3722 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3723 void btrfs_test_destroy_inode(struct inode *inode); 3724 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3725 { 3726 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3727 } 3728 #else 3729 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3730 { 3731 return 0; 3732 } 3733 #endif 3734 3735 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info) 3736 { 3737 return fs_info->zoned != 0; 3738 } 3739 3740 #endif 3741