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 /* Indicate that we can't trust the free space tree for caching yet */ 568 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, 569 }; 570 571 /* 572 * Exclusive operations (device replace, resize, device add/remove, balance) 573 */ 574 enum btrfs_exclusive_operation { 575 BTRFS_EXCLOP_NONE, 576 BTRFS_EXCLOP_BALANCE, 577 BTRFS_EXCLOP_DEV_ADD, 578 BTRFS_EXCLOP_DEV_REMOVE, 579 BTRFS_EXCLOP_DEV_REPLACE, 580 BTRFS_EXCLOP_RESIZE, 581 BTRFS_EXCLOP_SWAP_ACTIVATE, 582 }; 583 584 struct btrfs_fs_info { 585 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 586 unsigned long flags; 587 struct btrfs_root *extent_root; 588 struct btrfs_root *tree_root; 589 struct btrfs_root *chunk_root; 590 struct btrfs_root *dev_root; 591 struct btrfs_root *fs_root; 592 struct btrfs_root *csum_root; 593 struct btrfs_root *quota_root; 594 struct btrfs_root *uuid_root; 595 struct btrfs_root *free_space_root; 596 struct btrfs_root *data_reloc_root; 597 598 /* the log root tree is a directory of all the other log roots */ 599 struct btrfs_root *log_root_tree; 600 601 spinlock_t fs_roots_radix_lock; 602 struct radix_tree_root fs_roots_radix; 603 604 /* block group cache stuff */ 605 spinlock_t block_group_cache_lock; 606 u64 first_logical_byte; 607 struct rb_root block_group_cache_tree; 608 609 /* keep track of unallocated space */ 610 atomic64_t free_chunk_space; 611 612 /* Track ranges which are used by log trees blocks/logged data extents */ 613 struct extent_io_tree excluded_extents; 614 615 /* logical->physical extent mapping */ 616 struct extent_map_tree mapping_tree; 617 618 /* 619 * block reservation for extent, checksum, root tree and 620 * delayed dir index item 621 */ 622 struct btrfs_block_rsv global_block_rsv; 623 /* block reservation for metadata operations */ 624 struct btrfs_block_rsv trans_block_rsv; 625 /* block reservation for chunk tree */ 626 struct btrfs_block_rsv chunk_block_rsv; 627 /* block reservation for delayed operations */ 628 struct btrfs_block_rsv delayed_block_rsv; 629 /* block reservation for delayed refs */ 630 struct btrfs_block_rsv delayed_refs_rsv; 631 632 struct btrfs_block_rsv empty_block_rsv; 633 634 u64 generation; 635 u64 last_trans_committed; 636 u64 avg_delayed_ref_runtime; 637 638 /* 639 * this is updated to the current trans every time a full commit 640 * is required instead of the faster short fsync log commits 641 */ 642 u64 last_trans_log_full_commit; 643 unsigned long mount_opt; 644 /* 645 * Track requests for actions that need to be done during transaction 646 * commit (like for some mount options). 647 */ 648 unsigned long pending_changes; 649 unsigned long compress_type:4; 650 unsigned int compress_level; 651 u32 commit_interval; 652 /* 653 * It is a suggestive number, the read side is safe even it gets a 654 * wrong number because we will write out the data into a regular 655 * extent. The write side(mount/remount) is under ->s_umount lock, 656 * so it is also safe. 657 */ 658 u64 max_inline; 659 660 struct btrfs_transaction *running_transaction; 661 wait_queue_head_t transaction_throttle; 662 wait_queue_head_t transaction_wait; 663 wait_queue_head_t transaction_blocked_wait; 664 wait_queue_head_t async_submit_wait; 665 666 /* 667 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 668 * when they are updated. 669 * 670 * Because we do not clear the flags for ever, so we needn't use 671 * the lock on the read side. 672 * 673 * We also needn't use the lock when we mount the fs, because 674 * there is no other task which will update the flag. 675 */ 676 spinlock_t super_lock; 677 struct btrfs_super_block *super_copy; 678 struct btrfs_super_block *super_for_commit; 679 struct super_block *sb; 680 struct inode *btree_inode; 681 struct mutex tree_log_mutex; 682 struct mutex transaction_kthread_mutex; 683 struct mutex cleaner_mutex; 684 struct mutex chunk_mutex; 685 686 /* 687 * this is taken to make sure we don't set block groups ro after 688 * the free space cache has been allocated on them 689 */ 690 struct mutex ro_block_group_mutex; 691 692 /* this is used during read/modify/write to make sure 693 * no two ios are trying to mod the same stripe at the same 694 * time 695 */ 696 struct btrfs_stripe_hash_table *stripe_hash_table; 697 698 /* 699 * this protects the ordered operations list only while we are 700 * processing all of the entries on it. This way we make 701 * sure the commit code doesn't find the list temporarily empty 702 * because another function happens to be doing non-waiting preflush 703 * before jumping into the main commit. 704 */ 705 struct mutex ordered_operations_mutex; 706 707 struct rw_semaphore commit_root_sem; 708 709 struct rw_semaphore cleanup_work_sem; 710 711 struct rw_semaphore subvol_sem; 712 713 spinlock_t trans_lock; 714 /* 715 * the reloc mutex goes with the trans lock, it is taken 716 * during commit to protect us from the relocation code 717 */ 718 struct mutex reloc_mutex; 719 720 struct list_head trans_list; 721 struct list_head dead_roots; 722 struct list_head caching_block_groups; 723 724 spinlock_t delayed_iput_lock; 725 struct list_head delayed_iputs; 726 atomic_t nr_delayed_iputs; 727 wait_queue_head_t delayed_iputs_wait; 728 729 atomic64_t tree_mod_seq; 730 731 /* this protects tree_mod_log and tree_mod_seq_list */ 732 rwlock_t tree_mod_log_lock; 733 struct rb_root tree_mod_log; 734 struct list_head tree_mod_seq_list; 735 736 atomic_t async_delalloc_pages; 737 738 /* 739 * this is used to protect the following list -- ordered_roots. 740 */ 741 spinlock_t ordered_root_lock; 742 743 /* 744 * all fs/file tree roots in which there are data=ordered extents 745 * pending writeback are added into this list. 746 * 747 * these can span multiple transactions and basically include 748 * every dirty data page that isn't from nodatacow 749 */ 750 struct list_head ordered_roots; 751 752 struct mutex delalloc_root_mutex; 753 spinlock_t delalloc_root_lock; 754 /* all fs/file tree roots that have delalloc inodes. */ 755 struct list_head delalloc_roots; 756 757 /* 758 * there is a pool of worker threads for checksumming during writes 759 * and a pool for checksumming after reads. This is because readers 760 * can run with FS locks held, and the writers may be waiting for 761 * those locks. We don't want ordering in the pending list to cause 762 * deadlocks, and so the two are serviced separately. 763 * 764 * A third pool does submit_bio to avoid deadlocking with the other 765 * two 766 */ 767 struct btrfs_workqueue *workers; 768 struct btrfs_workqueue *delalloc_workers; 769 struct btrfs_workqueue *flush_workers; 770 struct btrfs_workqueue *endio_workers; 771 struct btrfs_workqueue *endio_meta_workers; 772 struct btrfs_workqueue *endio_raid56_workers; 773 struct btrfs_workqueue *rmw_workers; 774 struct btrfs_workqueue *endio_meta_write_workers; 775 struct btrfs_workqueue *endio_write_workers; 776 struct btrfs_workqueue *endio_freespace_worker; 777 struct btrfs_workqueue *caching_workers; 778 struct btrfs_workqueue *readahead_workers; 779 780 /* 781 * fixup workers take dirty pages that didn't properly go through 782 * the cow mechanism and make them safe to write. It happens 783 * for the sys_munmap function call path 784 */ 785 struct btrfs_workqueue *fixup_workers; 786 struct btrfs_workqueue *delayed_workers; 787 788 struct task_struct *transaction_kthread; 789 struct task_struct *cleaner_kthread; 790 u32 thread_pool_size; 791 792 struct kobject *space_info_kobj; 793 struct kobject *qgroups_kobj; 794 795 u64 total_pinned; 796 797 /* used to keep from writing metadata until there is a nice batch */ 798 struct percpu_counter dirty_metadata_bytes; 799 struct percpu_counter delalloc_bytes; 800 struct percpu_counter dio_bytes; 801 s32 dirty_metadata_batch; 802 s32 delalloc_batch; 803 804 struct list_head dirty_cowonly_roots; 805 806 struct btrfs_fs_devices *fs_devices; 807 808 /* 809 * The space_info list is effectively read only after initial 810 * setup. It is populated at mount time and cleaned up after 811 * all block groups are removed. RCU is used to protect it. 812 */ 813 struct list_head space_info; 814 815 struct btrfs_space_info *data_sinfo; 816 817 struct reloc_control *reloc_ctl; 818 819 /* data_alloc_cluster is only used in ssd_spread mode */ 820 struct btrfs_free_cluster data_alloc_cluster; 821 822 /* all metadata allocations go through this cluster */ 823 struct btrfs_free_cluster meta_alloc_cluster; 824 825 /* auto defrag inodes go here */ 826 spinlock_t defrag_inodes_lock; 827 struct rb_root defrag_inodes; 828 atomic_t defrag_running; 829 830 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 831 seqlock_t profiles_lock; 832 /* 833 * these three are in extended format (availability of single 834 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 835 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 836 */ 837 u64 avail_data_alloc_bits; 838 u64 avail_metadata_alloc_bits; 839 u64 avail_system_alloc_bits; 840 841 /* restriper state */ 842 spinlock_t balance_lock; 843 struct mutex balance_mutex; 844 atomic_t balance_pause_req; 845 atomic_t balance_cancel_req; 846 struct btrfs_balance_control *balance_ctl; 847 wait_queue_head_t balance_wait_q; 848 849 u32 data_chunk_allocations; 850 u32 metadata_ratio; 851 852 void *bdev_holder; 853 854 /* private scrub information */ 855 struct mutex scrub_lock; 856 atomic_t scrubs_running; 857 atomic_t scrub_pause_req; 858 atomic_t scrubs_paused; 859 atomic_t scrub_cancel_req; 860 wait_queue_head_t scrub_pause_wait; 861 /* 862 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 863 * running. 864 */ 865 refcount_t scrub_workers_refcnt; 866 struct btrfs_workqueue *scrub_workers; 867 struct btrfs_workqueue *scrub_wr_completion_workers; 868 struct btrfs_workqueue *scrub_parity_workers; 869 870 struct btrfs_discard_ctl discard_ctl; 871 872 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 873 u32 check_integrity_print_mask; 874 #endif 875 /* is qgroup tracking in a consistent state? */ 876 u64 qgroup_flags; 877 878 /* holds configuration and tracking. Protected by qgroup_lock */ 879 struct rb_root qgroup_tree; 880 spinlock_t qgroup_lock; 881 882 /* 883 * used to avoid frequently calling ulist_alloc()/ulist_free() 884 * when doing qgroup accounting, it must be protected by qgroup_lock. 885 */ 886 struct ulist *qgroup_ulist; 887 888 /* 889 * Protect user change for quota operations. If a transaction is needed, 890 * it must be started before locking this lock. 891 */ 892 struct mutex qgroup_ioctl_lock; 893 894 /* list of dirty qgroups to be written at next commit */ 895 struct list_head dirty_qgroups; 896 897 /* used by qgroup for an efficient tree traversal */ 898 u64 qgroup_seq; 899 900 /* qgroup rescan items */ 901 struct mutex qgroup_rescan_lock; /* protects the progress item */ 902 struct btrfs_key qgroup_rescan_progress; 903 struct btrfs_workqueue *qgroup_rescan_workers; 904 struct completion qgroup_rescan_completion; 905 struct btrfs_work qgroup_rescan_work; 906 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 907 908 /* filesystem state */ 909 unsigned long fs_state; 910 911 struct btrfs_delayed_root *delayed_root; 912 913 /* readahead tree */ 914 spinlock_t reada_lock; 915 struct radix_tree_root reada_tree; 916 917 /* readahead works cnt */ 918 atomic_t reada_works_cnt; 919 920 /* Extent buffer radix tree */ 921 spinlock_t buffer_lock; 922 /* Entries are eb->start / sectorsize */ 923 struct radix_tree_root buffer_radix; 924 925 /* next backup root to be overwritten */ 926 int backup_root_index; 927 928 /* device replace state */ 929 struct btrfs_dev_replace dev_replace; 930 931 struct semaphore uuid_tree_rescan_sem; 932 933 /* Used to reclaim the metadata space in the background. */ 934 struct work_struct async_reclaim_work; 935 struct work_struct async_data_reclaim_work; 936 937 spinlock_t unused_bgs_lock; 938 struct list_head unused_bgs; 939 struct mutex unused_bg_unpin_mutex; 940 struct mutex delete_unused_bgs_mutex; 941 942 /* Cached block sizes */ 943 u32 nodesize; 944 u32 sectorsize; 945 /* ilog2 of sectorsize, use to avoid 64bit division */ 946 u32 sectorsize_bits; 947 u32 csum_size; 948 u32 csums_per_leaf; 949 u32 stripesize; 950 951 /* Block groups and devices containing active swapfiles. */ 952 spinlock_t swapfile_pins_lock; 953 struct rb_root swapfile_pins; 954 955 struct crypto_shash *csum_shash; 956 957 /* 958 * Number of send operations in progress. 959 * Updated while holding fs_info::balance_mutex. 960 */ 961 int send_in_progress; 962 963 /* Type of exclusive operation running */ 964 unsigned long exclusive_operation; 965 966 /* 967 * Zone size > 0 when in ZONED mode, otherwise it's used for a check 968 * if the mode is enabled 969 */ 970 union { 971 u64 zone_size; 972 u64 zoned; 973 }; 974 975 /* Max size to emit ZONE_APPEND write command */ 976 u64 max_zone_append_size; 977 978 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 979 spinlock_t ref_verify_lock; 980 struct rb_root block_tree; 981 #endif 982 983 #ifdef CONFIG_BTRFS_DEBUG 984 struct kobject *debug_kobj; 985 struct kobject *discard_debug_kobj; 986 struct list_head allocated_roots; 987 988 spinlock_t eb_leak_lock; 989 struct list_head allocated_ebs; 990 #endif 991 }; 992 993 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 994 { 995 return sb->s_fs_info; 996 } 997 998 /* 999 * The state of btrfs root 1000 */ 1001 enum { 1002 /* 1003 * btrfs_record_root_in_trans is a multi-step process, and it can race 1004 * with the balancing code. But the race is very small, and only the 1005 * first time the root is added to each transaction. So IN_TRANS_SETUP 1006 * is used to tell us when more checks are required 1007 */ 1008 BTRFS_ROOT_IN_TRANS_SETUP, 1009 1010 /* 1011 * Set if tree blocks of this root can be shared by other roots. 1012 * Only subvolume trees and their reloc trees have this bit set. 1013 * Conflicts with TRACK_DIRTY bit. 1014 * 1015 * This affects two things: 1016 * 1017 * - How balance works 1018 * For shareable roots, we need to use reloc tree and do path 1019 * replacement for balance, and need various pre/post hooks for 1020 * snapshot creation to handle them. 1021 * 1022 * While for non-shareable trees, we just simply do a tree search 1023 * with COW. 1024 * 1025 * - How dirty roots are tracked 1026 * For shareable roots, btrfs_record_root_in_trans() is needed to 1027 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1028 * don't need to set this manually. 1029 */ 1030 BTRFS_ROOT_SHAREABLE, 1031 BTRFS_ROOT_TRACK_DIRTY, 1032 BTRFS_ROOT_IN_RADIX, 1033 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1034 BTRFS_ROOT_DEFRAG_RUNNING, 1035 BTRFS_ROOT_FORCE_COW, 1036 BTRFS_ROOT_MULTI_LOG_TASKS, 1037 BTRFS_ROOT_DIRTY, 1038 BTRFS_ROOT_DELETING, 1039 1040 /* 1041 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1042 * 1043 * Set for the subvolume tree owning the reloc tree. 1044 */ 1045 BTRFS_ROOT_DEAD_RELOC_TREE, 1046 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1047 BTRFS_ROOT_DEAD_TREE, 1048 /* The root has a log tree. Used for subvolume roots and the tree root. */ 1049 BTRFS_ROOT_HAS_LOG_TREE, 1050 /* Qgroup flushing is in progress */ 1051 BTRFS_ROOT_QGROUP_FLUSHING, 1052 }; 1053 1054 /* 1055 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1056 * code. For detail check comment in fs/btrfs/qgroup.c. 1057 */ 1058 struct btrfs_qgroup_swapped_blocks { 1059 spinlock_t lock; 1060 /* RM_EMPTY_ROOT() of above blocks[] */ 1061 bool swapped; 1062 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1063 }; 1064 1065 /* 1066 * in ram representation of the tree. extent_root is used for all allocations 1067 * and for the extent tree extent_root root. 1068 */ 1069 struct btrfs_root { 1070 struct extent_buffer *node; 1071 1072 struct extent_buffer *commit_root; 1073 struct btrfs_root *log_root; 1074 struct btrfs_root *reloc_root; 1075 1076 unsigned long state; 1077 struct btrfs_root_item root_item; 1078 struct btrfs_key root_key; 1079 struct btrfs_fs_info *fs_info; 1080 struct extent_io_tree dirty_log_pages; 1081 1082 struct mutex objectid_mutex; 1083 1084 spinlock_t accounting_lock; 1085 struct btrfs_block_rsv *block_rsv; 1086 1087 struct mutex log_mutex; 1088 wait_queue_head_t log_writer_wait; 1089 wait_queue_head_t log_commit_wait[2]; 1090 struct list_head log_ctxs[2]; 1091 /* Used only for log trees of subvolumes, not for the log root tree */ 1092 atomic_t log_writers; 1093 atomic_t log_commit[2]; 1094 /* Used only for log trees of subvolumes, not for the log root tree */ 1095 atomic_t log_batch; 1096 int log_transid; 1097 /* No matter the commit succeeds or not*/ 1098 int log_transid_committed; 1099 /* Just be updated when the commit succeeds. */ 1100 int last_log_commit; 1101 pid_t log_start_pid; 1102 1103 u64 last_trans; 1104 1105 u32 type; 1106 1107 u64 highest_objectid; 1108 1109 struct btrfs_key defrag_progress; 1110 struct btrfs_key defrag_max; 1111 1112 /* The dirty list is only used by non-shareable roots */ 1113 struct list_head dirty_list; 1114 1115 struct list_head root_list; 1116 1117 spinlock_t log_extents_lock[2]; 1118 struct list_head logged_list[2]; 1119 1120 int orphan_cleanup_state; 1121 1122 spinlock_t inode_lock; 1123 /* red-black tree that keeps track of in-memory inodes */ 1124 struct rb_root inode_tree; 1125 1126 /* 1127 * radix tree that keeps track of delayed nodes of every inode, 1128 * protected by inode_lock 1129 */ 1130 struct radix_tree_root delayed_nodes_tree; 1131 /* 1132 * right now this just gets used so that a root has its own devid 1133 * for stat. It may be used for more later 1134 */ 1135 dev_t anon_dev; 1136 1137 spinlock_t root_item_lock; 1138 refcount_t refs; 1139 1140 struct mutex delalloc_mutex; 1141 spinlock_t delalloc_lock; 1142 /* 1143 * all of the inodes that have delalloc bytes. It is possible for 1144 * this list to be empty even when there is still dirty data=ordered 1145 * extents waiting to finish IO. 1146 */ 1147 struct list_head delalloc_inodes; 1148 struct list_head delalloc_root; 1149 u64 nr_delalloc_inodes; 1150 1151 struct mutex ordered_extent_mutex; 1152 /* 1153 * this is used by the balancing code to wait for all the pending 1154 * ordered extents 1155 */ 1156 spinlock_t ordered_extent_lock; 1157 1158 /* 1159 * all of the data=ordered extents pending writeback 1160 * these can span multiple transactions and basically include 1161 * every dirty data page that isn't from nodatacow 1162 */ 1163 struct list_head ordered_extents; 1164 struct list_head ordered_root; 1165 u64 nr_ordered_extents; 1166 1167 /* 1168 * Not empty if this subvolume root has gone through tree block swap 1169 * (relocation) 1170 * 1171 * Will be used by reloc_control::dirty_subvol_roots. 1172 */ 1173 struct list_head reloc_dirty_list; 1174 1175 /* 1176 * Number of currently running SEND ioctls to prevent 1177 * manipulation with the read-only status via SUBVOL_SETFLAGS 1178 */ 1179 int send_in_progress; 1180 /* 1181 * Number of currently running deduplication operations that have a 1182 * destination inode belonging to this root. Protected by the lock 1183 * root_item_lock. 1184 */ 1185 int dedupe_in_progress; 1186 /* For exclusion of snapshot creation and nocow writes */ 1187 struct btrfs_drew_lock snapshot_lock; 1188 1189 atomic_t snapshot_force_cow; 1190 1191 /* For qgroup metadata reserved space */ 1192 spinlock_t qgroup_meta_rsv_lock; 1193 u64 qgroup_meta_rsv_pertrans; 1194 u64 qgroup_meta_rsv_prealloc; 1195 wait_queue_head_t qgroup_flush_wait; 1196 1197 /* Number of active swapfiles */ 1198 atomic_t nr_swapfiles; 1199 1200 /* Record pairs of swapped blocks for qgroup */ 1201 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1202 1203 /* Used only by log trees, when logging csum items */ 1204 struct extent_io_tree log_csum_range; 1205 1206 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1207 u64 alloc_bytenr; 1208 #endif 1209 1210 #ifdef CONFIG_BTRFS_DEBUG 1211 struct list_head leak_list; 1212 #endif 1213 }; 1214 1215 /* 1216 * Structure that conveys information about an extent that is going to replace 1217 * all the extents in a file range. 1218 */ 1219 struct btrfs_replace_extent_info { 1220 u64 disk_offset; 1221 u64 disk_len; 1222 u64 data_offset; 1223 u64 data_len; 1224 u64 file_offset; 1225 /* Pointer to a file extent item of type regular or prealloc. */ 1226 char *extent_buf; 1227 /* 1228 * Set to true when attempting to replace a file range with a new extent 1229 * described by this structure, set to false when attempting to clone an 1230 * existing extent into a file range. 1231 */ 1232 bool is_new_extent; 1233 /* Meaningful only if is_new_extent is true. */ 1234 int qgroup_reserved; 1235 /* 1236 * Meaningful only if is_new_extent is true. 1237 * Used to track how many extent items we have already inserted in a 1238 * subvolume tree that refer to the extent described by this structure, 1239 * so that we know when to create a new delayed ref or update an existing 1240 * one. 1241 */ 1242 int insertions; 1243 }; 1244 1245 /* Arguments for btrfs_drop_extents() */ 1246 struct btrfs_drop_extents_args { 1247 /* Input parameters */ 1248 1249 /* 1250 * If NULL, btrfs_drop_extents() will allocate and free its own path. 1251 * If 'replace_extent' is true, this must not be NULL. Also the path 1252 * is always released except if 'replace_extent' is true and 1253 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case 1254 * the path is kept locked. 1255 */ 1256 struct btrfs_path *path; 1257 /* Start offset of the range to drop extents from */ 1258 u64 start; 1259 /* End (exclusive, last byte + 1) of the range to drop extents from */ 1260 u64 end; 1261 /* If true drop all the extent maps in the range */ 1262 bool drop_cache; 1263 /* 1264 * If true it means we want to insert a new extent after dropping all 1265 * the extents in the range. If this is true, the 'extent_item_size' 1266 * parameter must be set as well and the 'extent_inserted' field will 1267 * be set to true by btrfs_drop_extents() if it could insert the new 1268 * extent. 1269 * Note: when this is set to true the path must not be NULL. 1270 */ 1271 bool replace_extent; 1272 /* 1273 * Used if 'replace_extent' is true. Size of the file extent item to 1274 * insert after dropping all existing extents in the range 1275 */ 1276 u32 extent_item_size; 1277 1278 /* Output parameters */ 1279 1280 /* 1281 * Set to the minimum between the input parameter 'end' and the end 1282 * (exclusive, last byte + 1) of the last dropped extent. This is always 1283 * set even if btrfs_drop_extents() returns an error. 1284 */ 1285 u64 drop_end; 1286 /* 1287 * The number of allocated bytes found in the range. This can be smaller 1288 * than the range's length when there are holes in the range. 1289 */ 1290 u64 bytes_found; 1291 /* 1292 * Only set if 'replace_extent' is true. Set to true if we were able 1293 * to insert a replacement extent after dropping all extents in the 1294 * range, otherwise set to false by btrfs_drop_extents(). 1295 * Also, if btrfs_drop_extents() has set this to true it means it 1296 * returned with the path locked, otherwise if it has set this to 1297 * false it has returned with the path released. 1298 */ 1299 bool extent_inserted; 1300 }; 1301 1302 struct btrfs_file_private { 1303 void *filldir_buf; 1304 }; 1305 1306 1307 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1308 { 1309 1310 return info->nodesize - sizeof(struct btrfs_header); 1311 } 1312 1313 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1314 1315 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1316 { 1317 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1318 } 1319 1320 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1321 { 1322 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1323 } 1324 1325 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1326 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1327 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1328 { 1329 return BTRFS_MAX_ITEM_SIZE(info) - 1330 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1331 } 1332 1333 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1334 { 1335 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1336 } 1337 1338 /* 1339 * Flags for mount options. 1340 * 1341 * Note: don't forget to add new options to btrfs_show_options() 1342 */ 1343 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1344 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1345 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1346 #define BTRFS_MOUNT_SSD (1 << 3) 1347 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1348 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1349 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1350 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1351 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1352 #define BTRFS_MOUNT_NOSSD (1 << 9) 1353 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1354 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1355 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1356 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1357 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1358 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1359 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1360 /* bit 17 is free */ 1361 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1362 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1363 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1364 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1365 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1366 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1367 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1368 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1369 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1370 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1371 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1372 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1373 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30) 1374 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31) 1375 1376 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1377 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1378 1379 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1380 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1381 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1382 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1383 BTRFS_MOUNT_##opt) 1384 1385 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1386 do { \ 1387 if (!btrfs_test_opt(fs_info, opt)) \ 1388 btrfs_info(fs_info, fmt, ##args); \ 1389 btrfs_set_opt(fs_info->mount_opt, opt); \ 1390 } while (0) 1391 1392 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1393 do { \ 1394 if (btrfs_test_opt(fs_info, opt)) \ 1395 btrfs_info(fs_info, fmt, ##args); \ 1396 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1397 } while (0) 1398 1399 /* 1400 * Requests for changes that need to be done during transaction commit. 1401 * 1402 * Internal mount options that are used for special handling of the real 1403 * mount options (eg. cannot be set during remount and have to be set during 1404 * transaction commit) 1405 */ 1406 1407 #define BTRFS_PENDING_COMMIT (0) 1408 1409 #define btrfs_test_pending(info, opt) \ 1410 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1411 #define btrfs_set_pending(info, opt) \ 1412 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1413 #define btrfs_clear_pending(info, opt) \ 1414 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1415 1416 /* 1417 * Helpers for setting pending mount option changes. 1418 * 1419 * Expects corresponding macros 1420 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1421 */ 1422 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1423 do { \ 1424 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1425 btrfs_info((info), fmt, ##args); \ 1426 btrfs_set_pending((info), SET_##opt); \ 1427 btrfs_clear_pending((info), CLEAR_##opt); \ 1428 } \ 1429 } while(0) 1430 1431 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1432 do { \ 1433 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1434 btrfs_info((info), fmt, ##args); \ 1435 btrfs_set_pending((info), CLEAR_##opt); \ 1436 btrfs_clear_pending((info), SET_##opt); \ 1437 } \ 1438 } while(0) 1439 1440 /* 1441 * Inode flags 1442 */ 1443 #define BTRFS_INODE_NODATASUM (1 << 0) 1444 #define BTRFS_INODE_NODATACOW (1 << 1) 1445 #define BTRFS_INODE_READONLY (1 << 2) 1446 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1447 #define BTRFS_INODE_PREALLOC (1 << 4) 1448 #define BTRFS_INODE_SYNC (1 << 5) 1449 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1450 #define BTRFS_INODE_APPEND (1 << 7) 1451 #define BTRFS_INODE_NODUMP (1 << 8) 1452 #define BTRFS_INODE_NOATIME (1 << 9) 1453 #define BTRFS_INODE_DIRSYNC (1 << 10) 1454 #define BTRFS_INODE_COMPRESS (1 << 11) 1455 1456 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1457 1458 #define BTRFS_INODE_FLAG_MASK \ 1459 (BTRFS_INODE_NODATASUM | \ 1460 BTRFS_INODE_NODATACOW | \ 1461 BTRFS_INODE_READONLY | \ 1462 BTRFS_INODE_NOCOMPRESS | \ 1463 BTRFS_INODE_PREALLOC | \ 1464 BTRFS_INODE_SYNC | \ 1465 BTRFS_INODE_IMMUTABLE | \ 1466 BTRFS_INODE_APPEND | \ 1467 BTRFS_INODE_NODUMP | \ 1468 BTRFS_INODE_NOATIME | \ 1469 BTRFS_INODE_DIRSYNC | \ 1470 BTRFS_INODE_COMPRESS | \ 1471 BTRFS_INODE_ROOT_ITEM_INIT) 1472 1473 struct btrfs_map_token { 1474 struct extent_buffer *eb; 1475 char *kaddr; 1476 unsigned long offset; 1477 }; 1478 1479 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1480 ((bytes) >> (fs_info)->sectorsize_bits) 1481 1482 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1483 struct extent_buffer *eb) 1484 { 1485 token->eb = eb; 1486 token->kaddr = page_address(eb->pages[0]); 1487 token->offset = 0; 1488 } 1489 1490 /* some macros to generate set/get functions for the struct fields. This 1491 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1492 * one for u8: 1493 */ 1494 #define le8_to_cpu(v) (v) 1495 #define cpu_to_le8(v) (v) 1496 #define __le8 u8 1497 1498 static inline u8 get_unaligned_le8(const void *p) 1499 { 1500 return *(u8 *)p; 1501 } 1502 1503 static inline void put_unaligned_le8(u8 val, void *p) 1504 { 1505 *(u8 *)p = val; 1506 } 1507 1508 #define read_eb_member(eb, ptr, type, member, result) (\ 1509 read_extent_buffer(eb, (char *)(result), \ 1510 ((unsigned long)(ptr)) + \ 1511 offsetof(type, member), \ 1512 sizeof(((type *)0)->member))) 1513 1514 #define write_eb_member(eb, ptr, type, member, result) (\ 1515 write_extent_buffer(eb, (char *)(result), \ 1516 ((unsigned long)(ptr)) + \ 1517 offsetof(type, member), \ 1518 sizeof(((type *)0)->member))) 1519 1520 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1521 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1522 const void *ptr, unsigned long off); \ 1523 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1524 const void *ptr, unsigned long off, \ 1525 u##bits val); \ 1526 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1527 const void *ptr, unsigned long off); \ 1528 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1529 unsigned long off, u##bits val); 1530 1531 DECLARE_BTRFS_SETGET_BITS(8) 1532 DECLARE_BTRFS_SETGET_BITS(16) 1533 DECLARE_BTRFS_SETGET_BITS(32) 1534 DECLARE_BTRFS_SETGET_BITS(64) 1535 1536 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1537 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1538 const type *s) \ 1539 { \ 1540 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1541 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1542 } \ 1543 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1544 u##bits val) \ 1545 { \ 1546 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1547 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1548 } \ 1549 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1550 const type *s) \ 1551 { \ 1552 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1553 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1554 } \ 1555 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1556 type *s, u##bits val) \ 1557 { \ 1558 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1559 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1560 } 1561 1562 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1563 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1564 { \ 1565 const type *p = page_address(eb->pages[0]) + \ 1566 offset_in_page(eb->start); \ 1567 return get_unaligned_le##bits(&p->member); \ 1568 } \ 1569 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1570 u##bits val) \ 1571 { \ 1572 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \ 1573 put_unaligned_le##bits(val, &p->member); \ 1574 } 1575 1576 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1577 static inline u##bits btrfs_##name(const type *s) \ 1578 { \ 1579 return get_unaligned_le##bits(&s->member); \ 1580 } \ 1581 static inline void btrfs_set_##name(type *s, u##bits val) \ 1582 { \ 1583 put_unaligned_le##bits(val, &s->member); \ 1584 } 1585 1586 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1587 struct btrfs_dev_item *s) 1588 { 1589 BUILD_BUG_ON(sizeof(u64) != 1590 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1591 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1592 total_bytes)); 1593 } 1594 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1595 struct btrfs_dev_item *s, 1596 u64 val) 1597 { 1598 BUILD_BUG_ON(sizeof(u64) != 1599 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1600 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1601 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1602 } 1603 1604 1605 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1606 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1607 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1608 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1609 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1610 start_offset, 64); 1611 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1612 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1613 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1614 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1615 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1616 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1617 1618 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1619 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1620 total_bytes, 64); 1621 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1622 bytes_used, 64); 1623 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1624 io_align, 32); 1625 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1626 io_width, 32); 1627 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1628 sector_size, 32); 1629 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1630 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1631 dev_group, 32); 1632 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1633 seek_speed, 8); 1634 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1635 bandwidth, 8); 1636 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1637 generation, 64); 1638 1639 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1640 { 1641 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1642 } 1643 1644 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1645 { 1646 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1647 } 1648 1649 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1650 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1651 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1652 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1653 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1654 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1655 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1656 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1657 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1658 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1659 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1660 1661 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1662 { 1663 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1664 } 1665 1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1667 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1669 stripe_len, 64); 1670 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1671 io_align, 32); 1672 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1673 io_width, 32); 1674 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1675 sector_size, 32); 1676 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1677 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1678 num_stripes, 16); 1679 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1680 sub_stripes, 16); 1681 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1682 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1683 1684 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1685 int nr) 1686 { 1687 unsigned long offset = (unsigned long)c; 1688 offset += offsetof(struct btrfs_chunk, stripe); 1689 offset += nr * sizeof(struct btrfs_stripe); 1690 return (struct btrfs_stripe *)offset; 1691 } 1692 1693 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1694 { 1695 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1696 } 1697 1698 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1699 struct btrfs_chunk *c, int nr) 1700 { 1701 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1702 } 1703 1704 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1705 struct btrfs_chunk *c, int nr) 1706 { 1707 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1708 } 1709 1710 /* struct btrfs_block_group_item */ 1711 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1712 used, 64); 1713 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1714 used, 64); 1715 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1716 struct btrfs_block_group_item, chunk_objectid, 64); 1717 1718 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1719 struct btrfs_block_group_item, chunk_objectid, 64); 1720 BTRFS_SETGET_FUNCS(block_group_flags, 1721 struct btrfs_block_group_item, flags, 64); 1722 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1723 struct btrfs_block_group_item, flags, 64); 1724 1725 /* struct btrfs_free_space_info */ 1726 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1727 extent_count, 32); 1728 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1729 1730 /* struct btrfs_inode_ref */ 1731 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1732 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1733 1734 /* struct btrfs_inode_extref */ 1735 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1736 parent_objectid, 64); 1737 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1738 name_len, 16); 1739 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1740 1741 /* struct btrfs_inode_item */ 1742 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1743 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1744 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1745 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1746 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1747 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1748 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1749 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1750 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1751 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1752 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1753 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1755 generation, 64); 1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1757 sequence, 64); 1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1759 transid, 64); 1760 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1761 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1762 nbytes, 64); 1763 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1764 block_group, 64); 1765 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1766 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1767 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1768 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1769 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1770 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1771 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1772 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1773 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1774 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1775 1776 /* struct btrfs_dev_extent */ 1777 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1778 chunk_tree, 64); 1779 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1780 chunk_objectid, 64); 1781 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1782 chunk_offset, 64); 1783 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1784 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1785 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1786 generation, 64); 1787 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1788 1789 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1790 1791 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1792 struct btrfs_tree_block_info *item, 1793 struct btrfs_disk_key *key) 1794 { 1795 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1796 } 1797 1798 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1799 struct btrfs_tree_block_info *item, 1800 struct btrfs_disk_key *key) 1801 { 1802 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1803 } 1804 1805 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1806 root, 64); 1807 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1808 objectid, 64); 1809 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1810 offset, 64); 1811 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1812 count, 32); 1813 1814 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1815 count, 32); 1816 1817 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1818 type, 8); 1819 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1820 offset, 64); 1821 1822 static inline u32 btrfs_extent_inline_ref_size(int type) 1823 { 1824 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1825 type == BTRFS_SHARED_BLOCK_REF_KEY) 1826 return sizeof(struct btrfs_extent_inline_ref); 1827 if (type == BTRFS_SHARED_DATA_REF_KEY) 1828 return sizeof(struct btrfs_shared_data_ref) + 1829 sizeof(struct btrfs_extent_inline_ref); 1830 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1831 return sizeof(struct btrfs_extent_data_ref) + 1832 offsetof(struct btrfs_extent_inline_ref, offset); 1833 return 0; 1834 } 1835 1836 /* struct btrfs_node */ 1837 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1838 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1839 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1840 blockptr, 64); 1841 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1842 generation, 64); 1843 1844 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1845 { 1846 unsigned long ptr; 1847 ptr = offsetof(struct btrfs_node, ptrs) + 1848 sizeof(struct btrfs_key_ptr) * nr; 1849 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1850 } 1851 1852 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1853 int nr, u64 val) 1854 { 1855 unsigned long ptr; 1856 ptr = offsetof(struct btrfs_node, ptrs) + 1857 sizeof(struct btrfs_key_ptr) * nr; 1858 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1859 } 1860 1861 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1862 { 1863 unsigned long ptr; 1864 ptr = offsetof(struct btrfs_node, ptrs) + 1865 sizeof(struct btrfs_key_ptr) * nr; 1866 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1867 } 1868 1869 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1870 int nr, u64 val) 1871 { 1872 unsigned long ptr; 1873 ptr = offsetof(struct btrfs_node, ptrs) + 1874 sizeof(struct btrfs_key_ptr) * nr; 1875 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1876 } 1877 1878 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1879 { 1880 return offsetof(struct btrfs_node, ptrs) + 1881 sizeof(struct btrfs_key_ptr) * nr; 1882 } 1883 1884 void btrfs_node_key(const struct extent_buffer *eb, 1885 struct btrfs_disk_key *disk_key, int nr); 1886 1887 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1888 struct btrfs_disk_key *disk_key, int nr) 1889 { 1890 unsigned long ptr; 1891 ptr = btrfs_node_key_ptr_offset(nr); 1892 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1893 struct btrfs_key_ptr, key, disk_key); 1894 } 1895 1896 /* struct btrfs_item */ 1897 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1898 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1899 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1900 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1901 1902 static inline unsigned long btrfs_item_nr_offset(int nr) 1903 { 1904 return offsetof(struct btrfs_leaf, items) + 1905 sizeof(struct btrfs_item) * nr; 1906 } 1907 1908 static inline struct btrfs_item *btrfs_item_nr(int nr) 1909 { 1910 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1911 } 1912 1913 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1914 struct btrfs_item *item) 1915 { 1916 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1917 } 1918 1919 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1920 { 1921 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1922 } 1923 1924 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1925 { 1926 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1927 } 1928 1929 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1930 { 1931 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1932 } 1933 1934 static inline void btrfs_item_key(const struct extent_buffer *eb, 1935 struct btrfs_disk_key *disk_key, int nr) 1936 { 1937 struct btrfs_item *item = btrfs_item_nr(nr); 1938 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1939 } 1940 1941 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1942 struct btrfs_disk_key *disk_key, int nr) 1943 { 1944 struct btrfs_item *item = btrfs_item_nr(nr); 1945 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1946 } 1947 1948 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1949 1950 /* 1951 * struct btrfs_root_ref 1952 */ 1953 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1954 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1955 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1956 1957 /* struct btrfs_dir_item */ 1958 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1959 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1960 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1961 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1962 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1963 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1964 data_len, 16); 1965 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1966 name_len, 16); 1967 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1968 transid, 64); 1969 1970 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1971 const struct btrfs_dir_item *item, 1972 struct btrfs_disk_key *key) 1973 { 1974 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1975 } 1976 1977 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1978 struct btrfs_dir_item *item, 1979 const struct btrfs_disk_key *key) 1980 { 1981 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1982 } 1983 1984 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1985 num_entries, 64); 1986 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1987 num_bitmaps, 64); 1988 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1989 generation, 64); 1990 1991 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1992 const struct btrfs_free_space_header *h, 1993 struct btrfs_disk_key *key) 1994 { 1995 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1996 } 1997 1998 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1999 struct btrfs_free_space_header *h, 2000 const struct btrfs_disk_key *key) 2001 { 2002 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 2003 } 2004 2005 /* struct btrfs_disk_key */ 2006 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 2007 objectid, 64); 2008 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 2009 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 2010 2011 #ifdef __LITTLE_ENDIAN 2012 2013 /* 2014 * Optimized helpers for little-endian architectures where CPU and on-disk 2015 * structures have the same endianness and we can skip conversions. 2016 */ 2017 2018 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 2019 const struct btrfs_disk_key *disk_key) 2020 { 2021 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 2022 } 2023 2024 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 2025 const struct btrfs_key *cpu_key) 2026 { 2027 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 2028 } 2029 2030 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2031 struct btrfs_key *cpu_key, int nr) 2032 { 2033 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2034 2035 btrfs_node_key(eb, disk_key, nr); 2036 } 2037 2038 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2039 struct btrfs_key *cpu_key, int nr) 2040 { 2041 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2042 2043 btrfs_item_key(eb, disk_key, nr); 2044 } 2045 2046 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2047 const struct btrfs_dir_item *item, 2048 struct btrfs_key *cpu_key) 2049 { 2050 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2051 2052 btrfs_dir_item_key(eb, item, disk_key); 2053 } 2054 2055 #else 2056 2057 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2058 const struct btrfs_disk_key *disk) 2059 { 2060 cpu->offset = le64_to_cpu(disk->offset); 2061 cpu->type = disk->type; 2062 cpu->objectid = le64_to_cpu(disk->objectid); 2063 } 2064 2065 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2066 const struct btrfs_key *cpu) 2067 { 2068 disk->offset = cpu_to_le64(cpu->offset); 2069 disk->type = cpu->type; 2070 disk->objectid = cpu_to_le64(cpu->objectid); 2071 } 2072 2073 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2074 struct btrfs_key *key, int nr) 2075 { 2076 struct btrfs_disk_key disk_key; 2077 btrfs_node_key(eb, &disk_key, nr); 2078 btrfs_disk_key_to_cpu(key, &disk_key); 2079 } 2080 2081 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2082 struct btrfs_key *key, int nr) 2083 { 2084 struct btrfs_disk_key disk_key; 2085 btrfs_item_key(eb, &disk_key, nr); 2086 btrfs_disk_key_to_cpu(key, &disk_key); 2087 } 2088 2089 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2090 const struct btrfs_dir_item *item, 2091 struct btrfs_key *key) 2092 { 2093 struct btrfs_disk_key disk_key; 2094 btrfs_dir_item_key(eb, item, &disk_key); 2095 btrfs_disk_key_to_cpu(key, &disk_key); 2096 } 2097 2098 #endif 2099 2100 /* struct btrfs_header */ 2101 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2102 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2103 generation, 64); 2104 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2105 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2106 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2107 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2108 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2109 generation, 64); 2110 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2111 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2112 nritems, 32); 2113 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2114 2115 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2116 { 2117 return (btrfs_header_flags(eb) & flag) == flag; 2118 } 2119 2120 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2121 { 2122 u64 flags = btrfs_header_flags(eb); 2123 btrfs_set_header_flags(eb, flags | flag); 2124 } 2125 2126 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2127 { 2128 u64 flags = btrfs_header_flags(eb); 2129 btrfs_set_header_flags(eb, flags & ~flag); 2130 } 2131 2132 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2133 { 2134 u64 flags = btrfs_header_flags(eb); 2135 return flags >> BTRFS_BACKREF_REV_SHIFT; 2136 } 2137 2138 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2139 int rev) 2140 { 2141 u64 flags = btrfs_header_flags(eb); 2142 flags &= ~BTRFS_BACKREF_REV_MASK; 2143 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2144 btrfs_set_header_flags(eb, flags); 2145 } 2146 2147 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2148 { 2149 return btrfs_header_level(eb) == 0; 2150 } 2151 2152 /* struct btrfs_root_item */ 2153 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2154 generation, 64); 2155 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2156 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2157 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2158 2159 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2160 generation, 64); 2161 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2162 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8); 2163 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2164 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2165 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2166 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2167 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2168 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2169 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2170 last_snapshot, 64); 2171 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2172 generation_v2, 64); 2173 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2174 ctransid, 64); 2175 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2176 otransid, 64); 2177 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2178 stransid, 64); 2179 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2180 rtransid, 64); 2181 2182 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2183 { 2184 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2185 } 2186 2187 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2188 { 2189 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2190 } 2191 2192 /* struct btrfs_root_backup */ 2193 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2194 tree_root, 64); 2195 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2196 tree_root_gen, 64); 2197 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2198 tree_root_level, 8); 2199 2200 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2201 chunk_root, 64); 2202 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2203 chunk_root_gen, 64); 2204 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2205 chunk_root_level, 8); 2206 2207 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2208 extent_root, 64); 2209 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2210 extent_root_gen, 64); 2211 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2212 extent_root_level, 8); 2213 2214 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2215 fs_root, 64); 2216 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2217 fs_root_gen, 64); 2218 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2219 fs_root_level, 8); 2220 2221 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2222 dev_root, 64); 2223 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2224 dev_root_gen, 64); 2225 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2226 dev_root_level, 8); 2227 2228 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2229 csum_root, 64); 2230 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2231 csum_root_gen, 64); 2232 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2233 csum_root_level, 8); 2234 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2235 total_bytes, 64); 2236 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2237 bytes_used, 64); 2238 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2239 num_devices, 64); 2240 2241 /* struct btrfs_balance_item */ 2242 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2243 2244 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2245 const struct btrfs_balance_item *bi, 2246 struct btrfs_disk_balance_args *ba) 2247 { 2248 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2249 } 2250 2251 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2252 struct btrfs_balance_item *bi, 2253 const struct btrfs_disk_balance_args *ba) 2254 { 2255 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2256 } 2257 2258 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2259 const struct btrfs_balance_item *bi, 2260 struct btrfs_disk_balance_args *ba) 2261 { 2262 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2263 } 2264 2265 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2266 struct btrfs_balance_item *bi, 2267 const struct btrfs_disk_balance_args *ba) 2268 { 2269 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2270 } 2271 2272 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2273 const struct btrfs_balance_item *bi, 2274 struct btrfs_disk_balance_args *ba) 2275 { 2276 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2277 } 2278 2279 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2280 struct btrfs_balance_item *bi, 2281 const struct btrfs_disk_balance_args *ba) 2282 { 2283 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2284 } 2285 2286 static inline void 2287 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2288 const struct btrfs_disk_balance_args *disk) 2289 { 2290 memset(cpu, 0, sizeof(*cpu)); 2291 2292 cpu->profiles = le64_to_cpu(disk->profiles); 2293 cpu->usage = le64_to_cpu(disk->usage); 2294 cpu->devid = le64_to_cpu(disk->devid); 2295 cpu->pstart = le64_to_cpu(disk->pstart); 2296 cpu->pend = le64_to_cpu(disk->pend); 2297 cpu->vstart = le64_to_cpu(disk->vstart); 2298 cpu->vend = le64_to_cpu(disk->vend); 2299 cpu->target = le64_to_cpu(disk->target); 2300 cpu->flags = le64_to_cpu(disk->flags); 2301 cpu->limit = le64_to_cpu(disk->limit); 2302 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2303 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2304 } 2305 2306 static inline void 2307 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2308 const struct btrfs_balance_args *cpu) 2309 { 2310 memset(disk, 0, sizeof(*disk)); 2311 2312 disk->profiles = cpu_to_le64(cpu->profiles); 2313 disk->usage = cpu_to_le64(cpu->usage); 2314 disk->devid = cpu_to_le64(cpu->devid); 2315 disk->pstart = cpu_to_le64(cpu->pstart); 2316 disk->pend = cpu_to_le64(cpu->pend); 2317 disk->vstart = cpu_to_le64(cpu->vstart); 2318 disk->vend = cpu_to_le64(cpu->vend); 2319 disk->target = cpu_to_le64(cpu->target); 2320 disk->flags = cpu_to_le64(cpu->flags); 2321 disk->limit = cpu_to_le64(cpu->limit); 2322 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2323 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2324 } 2325 2326 /* struct btrfs_super_block */ 2327 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2329 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2330 generation, 64); 2331 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2332 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2333 struct btrfs_super_block, sys_chunk_array_size, 32); 2334 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2335 struct btrfs_super_block, chunk_root_generation, 64); 2336 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2337 root_level, 8); 2338 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2339 chunk_root, 64); 2340 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2341 chunk_root_level, 8); 2342 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2343 log_root, 64); 2344 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2345 log_root_transid, 64); 2346 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2347 log_root_level, 8); 2348 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2349 total_bytes, 64); 2350 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2351 bytes_used, 64); 2352 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2353 sectorsize, 32); 2354 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2355 nodesize, 32); 2356 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2357 stripesize, 32); 2358 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2359 root_dir_objectid, 64); 2360 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2361 num_devices, 64); 2362 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2363 compat_flags, 64); 2364 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2365 compat_ro_flags, 64); 2366 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2367 incompat_flags, 64); 2368 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2369 csum_type, 16); 2370 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2371 cache_generation, 64); 2372 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2373 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2374 uuid_tree_generation, 64); 2375 2376 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2377 const char *btrfs_super_csum_name(u16 csum_type); 2378 const char *btrfs_super_csum_driver(u16 csum_type); 2379 size_t __attribute_const__ btrfs_get_num_csums(void); 2380 2381 2382 /* 2383 * The leaf data grows from end-to-front in the node. 2384 * this returns the address of the start of the last item, 2385 * which is the stop of the leaf data stack 2386 */ 2387 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2388 { 2389 u32 nr = btrfs_header_nritems(leaf); 2390 2391 if (nr == 0) 2392 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2393 return btrfs_item_offset_nr(leaf, nr - 1); 2394 } 2395 2396 /* struct btrfs_file_extent_item */ 2397 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2398 type, 8); 2399 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2400 struct btrfs_file_extent_item, disk_bytenr, 64); 2401 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2402 struct btrfs_file_extent_item, offset, 64); 2403 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2404 struct btrfs_file_extent_item, generation, 64); 2405 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2406 struct btrfs_file_extent_item, num_bytes, 64); 2407 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2408 struct btrfs_file_extent_item, ram_bytes, 64); 2409 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2410 struct btrfs_file_extent_item, disk_num_bytes, 64); 2411 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2412 struct btrfs_file_extent_item, compression, 8); 2413 2414 static inline unsigned long 2415 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2416 { 2417 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2418 } 2419 2420 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2421 { 2422 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2423 } 2424 2425 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2426 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2427 disk_bytenr, 64); 2428 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2429 generation, 64); 2430 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2431 disk_num_bytes, 64); 2432 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2433 offset, 64); 2434 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2435 num_bytes, 64); 2436 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2437 ram_bytes, 64); 2438 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2439 compression, 8); 2440 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2441 encryption, 8); 2442 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2443 other_encoding, 16); 2444 2445 /* 2446 * this returns the number of bytes used by the item on disk, minus the 2447 * size of any extent headers. If a file is compressed on disk, this is 2448 * the compressed size 2449 */ 2450 static inline u32 btrfs_file_extent_inline_item_len( 2451 const struct extent_buffer *eb, 2452 struct btrfs_item *e) 2453 { 2454 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2455 } 2456 2457 /* btrfs_qgroup_status_item */ 2458 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2459 generation, 64); 2460 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2461 version, 64); 2462 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2463 flags, 64); 2464 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2465 rescan, 64); 2466 2467 /* btrfs_qgroup_info_item */ 2468 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2469 generation, 64); 2470 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2471 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2472 rfer_cmpr, 64); 2473 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2474 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2475 excl_cmpr, 64); 2476 2477 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2478 struct btrfs_qgroup_info_item, generation, 64); 2479 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2480 rfer, 64); 2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2482 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2483 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2484 excl, 64); 2485 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2486 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2487 2488 /* btrfs_qgroup_limit_item */ 2489 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2490 flags, 64); 2491 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2492 max_rfer, 64); 2493 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2494 max_excl, 64); 2495 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2496 rsv_rfer, 64); 2497 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2498 rsv_excl, 64); 2499 2500 /* btrfs_dev_replace_item */ 2501 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2502 struct btrfs_dev_replace_item, src_devid, 64); 2503 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2504 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2505 64); 2506 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2507 replace_state, 64); 2508 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2509 time_started, 64); 2510 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2511 time_stopped, 64); 2512 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2513 num_write_errors, 64); 2514 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2515 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2516 64); 2517 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2518 cursor_left, 64); 2519 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2520 cursor_right, 64); 2521 2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2523 struct btrfs_dev_replace_item, src_devid, 64); 2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2525 struct btrfs_dev_replace_item, 2526 cont_reading_from_srcdev_mode, 64); 2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2528 struct btrfs_dev_replace_item, replace_state, 64); 2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2530 struct btrfs_dev_replace_item, time_started, 64); 2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2532 struct btrfs_dev_replace_item, time_stopped, 64); 2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2534 struct btrfs_dev_replace_item, num_write_errors, 64); 2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2536 struct btrfs_dev_replace_item, 2537 num_uncorrectable_read_errors, 64); 2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2539 struct btrfs_dev_replace_item, cursor_left, 64); 2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2541 struct btrfs_dev_replace_item, cursor_right, 64); 2542 2543 /* helper function to cast into the data area of the leaf. */ 2544 #define btrfs_item_ptr(leaf, slot, type) \ 2545 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2546 btrfs_item_offset_nr(leaf, slot))) 2547 2548 #define btrfs_item_ptr_offset(leaf, slot) \ 2549 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2550 btrfs_item_offset_nr(leaf, slot))) 2551 2552 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2553 { 2554 return crc32c(crc, address, length); 2555 } 2556 2557 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2558 { 2559 put_unaligned_le32(~crc, result); 2560 } 2561 2562 static inline u64 btrfs_name_hash(const char *name, int len) 2563 { 2564 return crc32c((u32)~1, name, len); 2565 } 2566 2567 /* 2568 * Figure the key offset of an extended inode ref 2569 */ 2570 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2571 int len) 2572 { 2573 return (u64) crc32c(parent_objectid, name, len); 2574 } 2575 2576 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2577 { 2578 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2579 } 2580 2581 /* extent-tree.c */ 2582 2583 enum btrfs_inline_ref_type { 2584 BTRFS_REF_TYPE_INVALID, 2585 BTRFS_REF_TYPE_BLOCK, 2586 BTRFS_REF_TYPE_DATA, 2587 BTRFS_REF_TYPE_ANY, 2588 }; 2589 2590 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2591 struct btrfs_extent_inline_ref *iref, 2592 enum btrfs_inline_ref_type is_data); 2593 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2594 2595 /* 2596 * Take the number of bytes to be checksummmed and figure out how many leaves 2597 * it would require to store the csums for that many bytes. 2598 */ 2599 static inline u64 btrfs_csum_bytes_to_leaves( 2600 const struct btrfs_fs_info *fs_info, u64 csum_bytes) 2601 { 2602 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits; 2603 2604 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf); 2605 } 2606 2607 /* 2608 * Use this if we would be adding new items, as we could split nodes as we cow 2609 * down the tree. 2610 */ 2611 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2612 unsigned num_items) 2613 { 2614 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2615 } 2616 2617 /* 2618 * Doing a truncate or a modification won't result in new nodes or leaves, just 2619 * what we need for COW. 2620 */ 2621 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2622 unsigned num_items) 2623 { 2624 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2625 } 2626 2627 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2628 u64 start, u64 num_bytes); 2629 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2630 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2631 unsigned long count); 2632 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2633 struct btrfs_delayed_ref_root *delayed_refs, 2634 struct btrfs_delayed_ref_head *head); 2635 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2636 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2637 struct btrfs_fs_info *fs_info, u64 bytenr, 2638 u64 offset, int metadata, u64 *refs, u64 *flags); 2639 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2640 int reserved); 2641 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2642 u64 bytenr, u64 num_bytes); 2643 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2644 int btrfs_cross_ref_exist(struct btrfs_root *root, 2645 u64 objectid, u64 offset, u64 bytenr, bool strict); 2646 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2647 struct btrfs_root *root, 2648 u64 parent, u64 root_objectid, 2649 const struct btrfs_disk_key *key, 2650 int level, u64 hint, 2651 u64 empty_size, 2652 enum btrfs_lock_nesting nest); 2653 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2654 struct btrfs_root *root, 2655 struct extent_buffer *buf, 2656 u64 parent, int last_ref); 2657 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2658 struct btrfs_root *root, u64 owner, 2659 u64 offset, u64 ram_bytes, 2660 struct btrfs_key *ins); 2661 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2662 u64 root_objectid, u64 owner, u64 offset, 2663 struct btrfs_key *ins); 2664 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2665 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2666 struct btrfs_key *ins, int is_data, int delalloc); 2667 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2668 struct extent_buffer *buf, int full_backref); 2669 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2670 struct extent_buffer *buf, int full_backref); 2671 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2672 struct extent_buffer *eb, u64 flags, 2673 int level, int is_data); 2674 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2675 2676 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2677 u64 start, u64 len, int delalloc); 2678 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2679 u64 len); 2680 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2681 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2682 struct btrfs_ref *generic_ref); 2683 2684 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2685 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2686 2687 /* 2688 * Different levels for to flush space when doing space reservations. 2689 * 2690 * The higher the level, the more methods we try to reclaim space. 2691 */ 2692 enum btrfs_reserve_flush_enum { 2693 /* If we are in the transaction, we can't flush anything.*/ 2694 BTRFS_RESERVE_NO_FLUSH, 2695 2696 /* 2697 * Flush space by: 2698 * - Running delayed inode items 2699 * - Allocating a new chunk 2700 */ 2701 BTRFS_RESERVE_FLUSH_LIMIT, 2702 2703 /* 2704 * Flush space by: 2705 * - Running delayed inode items 2706 * - Running delayed refs 2707 * - Running delalloc and waiting for ordered extents 2708 * - Allocating a new chunk 2709 */ 2710 BTRFS_RESERVE_FLUSH_EVICT, 2711 2712 /* 2713 * Flush space by above mentioned methods and by: 2714 * - Running delayed iputs 2715 * - Commiting transaction 2716 * 2717 * Can be interruped by fatal signal. 2718 */ 2719 BTRFS_RESERVE_FLUSH_DATA, 2720 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2721 BTRFS_RESERVE_FLUSH_ALL, 2722 2723 /* 2724 * Pretty much the same as FLUSH_ALL, but can also steal space from 2725 * global rsv. 2726 * 2727 * Can be interruped by fatal signal. 2728 */ 2729 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2730 }; 2731 2732 enum btrfs_flush_state { 2733 FLUSH_DELAYED_ITEMS_NR = 1, 2734 FLUSH_DELAYED_ITEMS = 2, 2735 FLUSH_DELAYED_REFS_NR = 3, 2736 FLUSH_DELAYED_REFS = 4, 2737 FLUSH_DELALLOC = 5, 2738 FLUSH_DELALLOC_WAIT = 6, 2739 ALLOC_CHUNK = 7, 2740 ALLOC_CHUNK_FORCE = 8, 2741 RUN_DELAYED_IPUTS = 9, 2742 COMMIT_TRANS = 10, 2743 }; 2744 2745 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2746 struct btrfs_block_rsv *rsv, 2747 int nitems, bool use_global_rsv); 2748 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2749 struct btrfs_block_rsv *rsv); 2750 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2751 2752 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2753 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2754 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2755 u64 start, u64 end); 2756 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2757 u64 num_bytes, u64 *actual_bytes); 2758 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2759 2760 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2761 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2762 struct btrfs_fs_info *fs_info); 2763 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2764 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2765 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2766 2767 /* ctree.c */ 2768 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2769 int *slot); 2770 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2771 int btrfs_previous_item(struct btrfs_root *root, 2772 struct btrfs_path *path, u64 min_objectid, 2773 int type); 2774 int btrfs_previous_extent_item(struct btrfs_root *root, 2775 struct btrfs_path *path, u64 min_objectid); 2776 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2777 struct btrfs_path *path, 2778 const struct btrfs_key *new_key); 2779 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2780 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2781 struct btrfs_key *key, int lowest_level, 2782 u64 min_trans); 2783 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2784 struct btrfs_path *path, 2785 u64 min_trans); 2786 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2787 int slot); 2788 2789 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2790 struct btrfs_root *root, struct extent_buffer *buf, 2791 struct extent_buffer *parent, int parent_slot, 2792 struct extent_buffer **cow_ret, 2793 enum btrfs_lock_nesting nest); 2794 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2795 struct btrfs_root *root, 2796 struct extent_buffer *buf, 2797 struct extent_buffer **cow_ret, u64 new_root_objectid); 2798 int btrfs_block_can_be_shared(struct btrfs_root *root, 2799 struct extent_buffer *buf); 2800 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2801 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2802 int btrfs_split_item(struct btrfs_trans_handle *trans, 2803 struct btrfs_root *root, 2804 struct btrfs_path *path, 2805 const struct btrfs_key *new_key, 2806 unsigned long split_offset); 2807 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2808 struct btrfs_root *root, 2809 struct btrfs_path *path, 2810 const struct btrfs_key *new_key); 2811 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2812 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2813 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2814 const struct btrfs_key *key, struct btrfs_path *p, 2815 int ins_len, int cow); 2816 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2817 struct btrfs_path *p, u64 time_seq); 2818 int btrfs_search_slot_for_read(struct btrfs_root *root, 2819 const struct btrfs_key *key, 2820 struct btrfs_path *p, int find_higher, 2821 int return_any); 2822 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2823 struct btrfs_root *root, struct extent_buffer *parent, 2824 int start_slot, u64 *last_ret, 2825 struct btrfs_key *progress); 2826 void btrfs_release_path(struct btrfs_path *p); 2827 struct btrfs_path *btrfs_alloc_path(void); 2828 void btrfs_free_path(struct btrfs_path *p); 2829 2830 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2831 struct btrfs_path *path, int slot, int nr); 2832 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2833 struct btrfs_root *root, 2834 struct btrfs_path *path) 2835 { 2836 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2837 } 2838 2839 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2840 const struct btrfs_key *cpu_key, u32 *data_size, 2841 int nr); 2842 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2843 const struct btrfs_key *key, void *data, u32 data_size); 2844 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2845 struct btrfs_root *root, 2846 struct btrfs_path *path, 2847 const struct btrfs_key *cpu_key, u32 *data_size, 2848 int nr); 2849 2850 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2851 struct btrfs_root *root, 2852 struct btrfs_path *path, 2853 const struct btrfs_key *key, 2854 u32 data_size) 2855 { 2856 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2857 } 2858 2859 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2860 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2861 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2862 u64 time_seq); 2863 static inline int btrfs_next_old_item(struct btrfs_root *root, 2864 struct btrfs_path *p, u64 time_seq) 2865 { 2866 ++p->slots[0]; 2867 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2868 return btrfs_next_old_leaf(root, p, time_seq); 2869 return 0; 2870 } 2871 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2872 { 2873 return btrfs_next_old_item(root, p, 0); 2874 } 2875 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2876 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2877 int for_reloc); 2878 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2879 struct btrfs_root *root, 2880 struct extent_buffer *node, 2881 struct extent_buffer *parent); 2882 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2883 { 2884 /* 2885 * Do it this way so we only ever do one test_bit in the normal case. 2886 */ 2887 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2888 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2889 return 2; 2890 return 1; 2891 } 2892 return 0; 2893 } 2894 2895 /* 2896 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2897 * anything except sleeping. This function is used to check the status of 2898 * the fs. 2899 * We check for BTRFS_FS_STATE_RO to avoid races with a concurrent remount, 2900 * since setting and checking for SB_RDONLY in the superblock's flags is not 2901 * atomic. 2902 */ 2903 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2904 { 2905 return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) || 2906 btrfs_fs_closing(fs_info); 2907 } 2908 2909 static inline void btrfs_set_sb_rdonly(struct super_block *sb) 2910 { 2911 sb->s_flags |= SB_RDONLY; 2912 set_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state); 2913 } 2914 2915 static inline void btrfs_clear_sb_rdonly(struct super_block *sb) 2916 { 2917 sb->s_flags &= ~SB_RDONLY; 2918 clear_bit(BTRFS_FS_STATE_RO, &btrfs_sb(sb)->fs_state); 2919 } 2920 2921 /* tree mod log functions from ctree.c */ 2922 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2923 struct seq_list *elem); 2924 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2925 struct seq_list *elem); 2926 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2927 2928 /* root-item.c */ 2929 int btrfs_add_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_ref(struct btrfs_trans_handle *trans, u64 root_id, 2933 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2934 int name_len); 2935 int btrfs_del_root(struct btrfs_trans_handle *trans, 2936 const struct btrfs_key *key); 2937 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2938 const struct btrfs_key *key, 2939 struct btrfs_root_item *item); 2940 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2941 struct btrfs_root *root, 2942 struct btrfs_key *key, 2943 struct btrfs_root_item *item); 2944 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2945 struct btrfs_path *path, struct btrfs_root_item *root_item, 2946 struct btrfs_key *root_key); 2947 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2948 void btrfs_set_root_node(struct btrfs_root_item *item, 2949 struct extent_buffer *node); 2950 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2951 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2952 struct btrfs_root *root); 2953 2954 /* uuid-tree.c */ 2955 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2956 u64 subid); 2957 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2958 u64 subid); 2959 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2960 2961 /* dir-item.c */ 2962 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2963 const char *name, int name_len); 2964 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2965 int name_len, struct btrfs_inode *dir, 2966 struct btrfs_key *location, u8 type, u64 index); 2967 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2968 struct btrfs_root *root, 2969 struct btrfs_path *path, u64 dir, 2970 const char *name, int name_len, 2971 int mod); 2972 struct btrfs_dir_item * 2973 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2974 struct btrfs_root *root, 2975 struct btrfs_path *path, u64 dir, 2976 u64 objectid, const char *name, int name_len, 2977 int mod); 2978 struct btrfs_dir_item * 2979 btrfs_search_dir_index_item(struct btrfs_root *root, 2980 struct btrfs_path *path, u64 dirid, 2981 const char *name, int name_len); 2982 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2983 struct btrfs_root *root, 2984 struct btrfs_path *path, 2985 struct btrfs_dir_item *di); 2986 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2987 struct btrfs_root *root, 2988 struct btrfs_path *path, u64 objectid, 2989 const char *name, u16 name_len, 2990 const void *data, u16 data_len); 2991 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2992 struct btrfs_root *root, 2993 struct btrfs_path *path, u64 dir, 2994 const char *name, u16 name_len, 2995 int mod); 2996 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2997 struct btrfs_path *path, 2998 const char *name, 2999 int name_len); 3000 3001 /* orphan.c */ 3002 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3003 struct btrfs_root *root, u64 offset); 3004 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3005 struct btrfs_root *root, u64 offset); 3006 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3007 3008 /* inode-item.c */ 3009 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3010 struct btrfs_root *root, 3011 const char *name, int name_len, 3012 u64 inode_objectid, u64 ref_objectid, u64 index); 3013 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3014 struct btrfs_root *root, 3015 const char *name, int name_len, 3016 u64 inode_objectid, u64 ref_objectid, u64 *index); 3017 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3018 struct btrfs_root *root, 3019 struct btrfs_path *path, u64 objectid); 3020 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3021 *root, struct btrfs_path *path, 3022 struct btrfs_key *location, int mod); 3023 3024 struct btrfs_inode_extref * 3025 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3026 struct btrfs_root *root, 3027 struct btrfs_path *path, 3028 const char *name, int name_len, 3029 u64 inode_objectid, u64 ref_objectid, int ins_len, 3030 int cow); 3031 3032 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 3033 int slot, const char *name, 3034 int name_len); 3035 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 3036 struct extent_buffer *leaf, int slot, u64 ref_objectid, 3037 const char *name, int name_len); 3038 /* file-item.c */ 3039 struct btrfs_dio_private; 3040 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3041 struct btrfs_root *root, u64 bytenr, u64 len); 3042 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst); 3043 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3044 struct btrfs_root *root, 3045 u64 objectid, u64 pos, 3046 u64 disk_offset, u64 disk_num_bytes, 3047 u64 num_bytes, u64 offset, u64 ram_bytes, 3048 u8 compression, u8 encryption, u16 other_encoding); 3049 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3050 struct btrfs_root *root, 3051 struct btrfs_path *path, u64 objectid, 3052 u64 bytenr, int mod); 3053 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3054 struct btrfs_root *root, 3055 struct btrfs_ordered_sum *sums); 3056 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 3057 u64 file_start, int contig); 3058 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3059 struct list_head *list, int search_commit); 3060 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3061 const struct btrfs_path *path, 3062 struct btrfs_file_extent_item *fi, 3063 const bool new_inline, 3064 struct extent_map *em); 3065 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 3066 u64 len); 3067 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 3068 u64 len); 3069 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); 3070 u64 btrfs_file_extent_end(const struct btrfs_path *path); 3071 3072 /* inode.c */ 3073 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 3074 int mirror_num, unsigned long bio_flags); 3075 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset, 3076 struct page *page, u64 start, u64 end, int mirror); 3077 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3078 u64 start, u64 len); 3079 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3080 u64 *orig_start, u64 *orig_block_len, 3081 u64 *ram_bytes, bool strict); 3082 3083 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3084 struct btrfs_inode *inode); 3085 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3086 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3087 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3088 struct btrfs_root *root, 3089 struct btrfs_inode *dir, struct btrfs_inode *inode, 3090 const char *name, int name_len); 3091 int btrfs_add_link(struct btrfs_trans_handle *trans, 3092 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3093 const char *name, int name_len, int add_backref, u64 index); 3094 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3095 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, 3096 int front); 3097 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3098 struct btrfs_root *root, 3099 struct btrfs_inode *inode, u64 new_size, 3100 u32 min_type); 3101 3102 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3103 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr, 3104 bool in_reclaim_context); 3105 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3106 unsigned int extra_bits, 3107 struct extent_state **cached_state); 3108 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3109 struct btrfs_root *new_root, 3110 struct btrfs_root *parent_root, 3111 u64 new_dirid); 3112 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3113 unsigned *bits); 3114 void btrfs_clear_delalloc_extent(struct inode *inode, 3115 struct extent_state *state, unsigned *bits); 3116 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3117 struct extent_state *other); 3118 void btrfs_split_delalloc_extent(struct inode *inode, 3119 struct extent_state *orig, u64 split); 3120 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3121 unsigned long bio_flags); 3122 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3123 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3124 int btrfs_readpage(struct file *file, struct page *page); 3125 void btrfs_evict_inode(struct inode *inode); 3126 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3127 struct inode *btrfs_alloc_inode(struct super_block *sb); 3128 void btrfs_destroy_inode(struct inode *inode); 3129 void btrfs_free_inode(struct inode *inode); 3130 int btrfs_drop_inode(struct inode *inode); 3131 int __init btrfs_init_cachep(void); 3132 void __cold btrfs_destroy_cachep(void); 3133 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3134 struct btrfs_root *root, struct btrfs_path *path); 3135 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3136 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3137 struct page *page, size_t pg_offset, 3138 u64 start, u64 end); 3139 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3140 struct btrfs_root *root, struct btrfs_inode *inode); 3141 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3142 struct btrfs_root *root, struct btrfs_inode *inode); 3143 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3144 struct btrfs_inode *inode); 3145 int btrfs_orphan_cleanup(struct btrfs_root *root); 3146 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); 3147 void btrfs_add_delayed_iput(struct inode *inode); 3148 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3149 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3150 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3151 u64 start, u64 num_bytes, u64 min_size, 3152 loff_t actual_len, u64 *alloc_hint); 3153 int btrfs_prealloc_file_range_trans(struct inode *inode, 3154 struct btrfs_trans_handle *trans, int mode, 3155 u64 start, u64 num_bytes, u64 min_size, 3156 loff_t actual_len, u64 *alloc_hint); 3157 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3158 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3159 struct writeback_control *wbc); 3160 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3161 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3162 u64 end, int uptodate); 3163 extern const struct dentry_operations btrfs_dentry_operations; 3164 extern const struct iomap_ops btrfs_dio_iomap_ops; 3165 extern const struct iomap_dio_ops btrfs_dio_ops; 3166 3167 /* Inode locking type flags, by default the exclusive lock is taken */ 3168 #define BTRFS_ILOCK_SHARED (1U << 0) 3169 #define BTRFS_ILOCK_TRY (1U << 1) 3170 3171 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); 3172 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); 3173 void btrfs_update_inode_bytes(struct btrfs_inode *inode, 3174 const u64 add_bytes, 3175 const u64 del_bytes); 3176 3177 /* ioctl.c */ 3178 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3179 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3180 int btrfs_ioctl_get_supported_features(void __user *arg); 3181 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3182 int __pure btrfs_is_empty_uuid(u8 *uuid); 3183 int btrfs_defrag_file(struct inode *inode, struct file *file, 3184 struct btrfs_ioctl_defrag_range_args *range, 3185 u64 newer_than, unsigned long max_pages); 3186 void btrfs_get_block_group_info(struct list_head *groups_list, 3187 struct btrfs_ioctl_space_info *space); 3188 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3189 struct btrfs_ioctl_balance_args *bargs); 3190 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3191 enum btrfs_exclusive_operation type); 3192 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3193 3194 /* file.c */ 3195 int __init btrfs_auto_defrag_init(void); 3196 void __cold btrfs_auto_defrag_exit(void); 3197 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3198 struct btrfs_inode *inode); 3199 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3200 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3201 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3202 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3203 int skip_pinned); 3204 extern const struct file_operations btrfs_file_operations; 3205 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3206 struct btrfs_root *root, struct btrfs_inode *inode, 3207 struct btrfs_drop_extents_args *args); 3208 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path, 3209 const u64 start, const u64 end, 3210 struct btrfs_replace_extent_info *extent_info, 3211 struct btrfs_trans_handle **trans_out); 3212 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3213 struct btrfs_inode *inode, u64 start, u64 end); 3214 int btrfs_release_file(struct inode *inode, struct file *file); 3215 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3216 size_t num_pages, loff_t pos, size_t write_bytes, 3217 struct extent_state **cached, bool noreserve); 3218 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3219 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3220 size_t *write_bytes); 3221 void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3222 3223 /* tree-defrag.c */ 3224 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3225 struct btrfs_root *root); 3226 3227 /* super.c */ 3228 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3229 unsigned long new_flags); 3230 int btrfs_sync_fs(struct super_block *sb, int wait); 3231 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3232 u64 subvol_objectid); 3233 3234 static inline __printf(2, 3) __cold 3235 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3236 { 3237 } 3238 3239 #ifdef CONFIG_PRINTK 3240 __printf(2, 3) 3241 __cold 3242 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3243 #else 3244 #define btrfs_printk(fs_info, fmt, args...) \ 3245 btrfs_no_printk(fs_info, fmt, ##args) 3246 #endif 3247 3248 #define btrfs_emerg(fs_info, fmt, args...) \ 3249 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3250 #define btrfs_alert(fs_info, fmt, args...) \ 3251 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3252 #define btrfs_crit(fs_info, fmt, args...) \ 3253 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3254 #define btrfs_err(fs_info, fmt, args...) \ 3255 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3256 #define btrfs_warn(fs_info, fmt, args...) \ 3257 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3258 #define btrfs_notice(fs_info, fmt, args...) \ 3259 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3260 #define btrfs_info(fs_info, fmt, args...) \ 3261 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3262 3263 /* 3264 * Wrappers that use printk_in_rcu 3265 */ 3266 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3267 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3268 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3269 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3270 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3271 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3272 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3273 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3274 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3275 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3276 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3277 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3278 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3279 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3280 3281 /* 3282 * Wrappers that use a ratelimited printk_in_rcu 3283 */ 3284 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3285 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3286 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3287 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3288 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3289 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3290 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3291 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3292 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3293 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3294 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3295 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3296 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3297 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3298 3299 /* 3300 * Wrappers that use a ratelimited printk 3301 */ 3302 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3303 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3304 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3305 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3306 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3307 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3308 #define btrfs_err_rl(fs_info, fmt, args...) \ 3309 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3310 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3311 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3312 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3313 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3314 #define btrfs_info_rl(fs_info, fmt, args...) \ 3315 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3316 3317 #if defined(CONFIG_DYNAMIC_DEBUG) 3318 #define btrfs_debug(fs_info, fmt, args...) \ 3319 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3320 fs_info, KERN_DEBUG fmt, ##args) 3321 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3322 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3323 fs_info, KERN_DEBUG fmt, ##args) 3324 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3325 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3326 fs_info, KERN_DEBUG fmt, ##args) 3327 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3328 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3329 fs_info, KERN_DEBUG fmt, ##args) 3330 #elif defined(DEBUG) 3331 #define btrfs_debug(fs_info, fmt, args...) \ 3332 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3333 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3334 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3335 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3336 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3337 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3338 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3339 #else 3340 #define btrfs_debug(fs_info, fmt, args...) \ 3341 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3342 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3343 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3344 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3345 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3346 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3347 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3348 #endif 3349 3350 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3351 do { \ 3352 rcu_read_lock(); \ 3353 btrfs_printk(fs_info, fmt, ##args); \ 3354 rcu_read_unlock(); \ 3355 } while (0) 3356 3357 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3358 do { \ 3359 rcu_read_lock(); \ 3360 btrfs_no_printk(fs_info, fmt, ##args); \ 3361 rcu_read_unlock(); \ 3362 } while (0) 3363 3364 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3365 do { \ 3366 static DEFINE_RATELIMIT_STATE(_rs, \ 3367 DEFAULT_RATELIMIT_INTERVAL, \ 3368 DEFAULT_RATELIMIT_BURST); \ 3369 if (__ratelimit(&_rs)) \ 3370 btrfs_printk(fs_info, fmt, ##args); \ 3371 } while (0) 3372 3373 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3374 do { \ 3375 rcu_read_lock(); \ 3376 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3377 rcu_read_unlock(); \ 3378 } while (0) 3379 3380 #ifdef CONFIG_BTRFS_ASSERT 3381 __cold __noreturn 3382 static inline void assertfail(const char *expr, const char *file, int line) 3383 { 3384 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3385 BUG(); 3386 } 3387 3388 #define ASSERT(expr) \ 3389 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3390 3391 #else 3392 static inline void assertfail(const char *expr, const char* file, int line) { } 3393 #define ASSERT(expr) (void)(expr) 3394 #endif 3395 3396 /* 3397 * Get the correct offset inside the page of extent buffer. 3398 * 3399 * @eb: target extent buffer 3400 * @start: offset inside the extent buffer 3401 * 3402 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases. 3403 */ 3404 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb, 3405 unsigned long offset) 3406 { 3407 /* 3408 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned 3409 * to PAGE_SIZE, thus adding it won't cause any difference. 3410 * 3411 * For sectorsize < PAGE_SIZE, we must only read the data that belongs 3412 * to the eb, thus we have to take the eb->start into consideration. 3413 */ 3414 return offset_in_page(offset + eb->start); 3415 } 3416 3417 static inline unsigned long get_eb_page_index(unsigned long offset) 3418 { 3419 /* 3420 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough. 3421 * 3422 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE, 3423 * and have ensured that all tree blocks are contained in one page, 3424 * thus we always get index == 0. 3425 */ 3426 return offset >> PAGE_SHIFT; 3427 } 3428 3429 /* 3430 * Use that for functions that are conditionally exported for sanity tests but 3431 * otherwise static 3432 */ 3433 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3434 #define EXPORT_FOR_TESTS static 3435 #else 3436 #define EXPORT_FOR_TESTS 3437 #endif 3438 3439 __cold 3440 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3441 { 3442 btrfs_err(fs_info, 3443 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3444 } 3445 3446 __printf(5, 6) 3447 __cold 3448 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3449 unsigned int line, int errno, const char *fmt, ...); 3450 3451 const char * __attribute_const__ btrfs_decode_error(int errno); 3452 3453 __cold 3454 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3455 const char *function, 3456 unsigned int line, int errno); 3457 3458 /* 3459 * Call btrfs_abort_transaction as early as possible when an error condition is 3460 * detected, that way the exact line number is reported. 3461 */ 3462 #define btrfs_abort_transaction(trans, errno) \ 3463 do { \ 3464 /* Report first abort since mount */ \ 3465 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3466 &((trans)->fs_info->fs_state))) { \ 3467 if ((errno) != -EIO && (errno) != -EROFS) { \ 3468 WARN(1, KERN_DEBUG \ 3469 "BTRFS: Transaction aborted (error %d)\n", \ 3470 (errno)); \ 3471 } else { \ 3472 btrfs_debug((trans)->fs_info, \ 3473 "Transaction aborted (error %d)", \ 3474 (errno)); \ 3475 } \ 3476 } \ 3477 __btrfs_abort_transaction((trans), __func__, \ 3478 __LINE__, (errno)); \ 3479 } while (0) 3480 3481 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3482 do { \ 3483 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3484 (errno), fmt, ##args); \ 3485 } while (0) 3486 3487 __printf(5, 6) 3488 __cold 3489 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3490 unsigned int line, int errno, const char *fmt, ...); 3491 /* 3492 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3493 * will panic(). Otherwise we BUG() here. 3494 */ 3495 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3496 do { \ 3497 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3498 BUG(); \ 3499 } while (0) 3500 3501 3502 /* compatibility and incompatibility defines */ 3503 3504 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3505 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3506 #opt) 3507 3508 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3509 u64 flag, const char* name) 3510 { 3511 struct btrfs_super_block *disk_super; 3512 u64 features; 3513 3514 disk_super = fs_info->super_copy; 3515 features = btrfs_super_incompat_flags(disk_super); 3516 if (!(features & flag)) { 3517 spin_lock(&fs_info->super_lock); 3518 features = btrfs_super_incompat_flags(disk_super); 3519 if (!(features & flag)) { 3520 features |= flag; 3521 btrfs_set_super_incompat_flags(disk_super, features); 3522 btrfs_info(fs_info, 3523 "setting incompat feature flag for %s (0x%llx)", 3524 name, flag); 3525 } 3526 spin_unlock(&fs_info->super_lock); 3527 } 3528 } 3529 3530 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3531 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3532 #opt) 3533 3534 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3535 u64 flag, const char* name) 3536 { 3537 struct btrfs_super_block *disk_super; 3538 u64 features; 3539 3540 disk_super = fs_info->super_copy; 3541 features = btrfs_super_incompat_flags(disk_super); 3542 if (features & flag) { 3543 spin_lock(&fs_info->super_lock); 3544 features = btrfs_super_incompat_flags(disk_super); 3545 if (features & flag) { 3546 features &= ~flag; 3547 btrfs_set_super_incompat_flags(disk_super, features); 3548 btrfs_info(fs_info, 3549 "clearing incompat feature flag for %s (0x%llx)", 3550 name, flag); 3551 } 3552 spin_unlock(&fs_info->super_lock); 3553 } 3554 } 3555 3556 #define btrfs_fs_incompat(fs_info, opt) \ 3557 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3558 3559 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3560 { 3561 struct btrfs_super_block *disk_super; 3562 disk_super = fs_info->super_copy; 3563 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3564 } 3565 3566 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3567 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3568 #opt) 3569 3570 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3571 u64 flag, const char *name) 3572 { 3573 struct btrfs_super_block *disk_super; 3574 u64 features; 3575 3576 disk_super = fs_info->super_copy; 3577 features = btrfs_super_compat_ro_flags(disk_super); 3578 if (!(features & flag)) { 3579 spin_lock(&fs_info->super_lock); 3580 features = btrfs_super_compat_ro_flags(disk_super); 3581 if (!(features & flag)) { 3582 features |= flag; 3583 btrfs_set_super_compat_ro_flags(disk_super, features); 3584 btrfs_info(fs_info, 3585 "setting compat-ro feature flag for %s (0x%llx)", 3586 name, flag); 3587 } 3588 spin_unlock(&fs_info->super_lock); 3589 } 3590 } 3591 3592 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3593 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3594 #opt) 3595 3596 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3597 u64 flag, const char *name) 3598 { 3599 struct btrfs_super_block *disk_super; 3600 u64 features; 3601 3602 disk_super = fs_info->super_copy; 3603 features = btrfs_super_compat_ro_flags(disk_super); 3604 if (features & flag) { 3605 spin_lock(&fs_info->super_lock); 3606 features = btrfs_super_compat_ro_flags(disk_super); 3607 if (features & flag) { 3608 features &= ~flag; 3609 btrfs_set_super_compat_ro_flags(disk_super, features); 3610 btrfs_info(fs_info, 3611 "clearing compat-ro feature flag for %s (0x%llx)", 3612 name, flag); 3613 } 3614 spin_unlock(&fs_info->super_lock); 3615 } 3616 } 3617 3618 #define btrfs_fs_compat_ro(fs_info, opt) \ 3619 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3620 3621 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3622 { 3623 struct btrfs_super_block *disk_super; 3624 disk_super = fs_info->super_copy; 3625 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3626 } 3627 3628 /* acl.c */ 3629 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3630 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3631 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3632 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3633 struct inode *inode, struct inode *dir); 3634 #else 3635 #define btrfs_get_acl NULL 3636 #define btrfs_set_acl NULL 3637 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3638 struct inode *inode, struct inode *dir) 3639 { 3640 return 0; 3641 } 3642 #endif 3643 3644 /* relocation.c */ 3645 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3646 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3647 struct btrfs_root *root); 3648 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3649 struct btrfs_root *root); 3650 int btrfs_recover_relocation(struct btrfs_root *root); 3651 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3652 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3653 struct btrfs_root *root, struct extent_buffer *buf, 3654 struct extent_buffer *cow); 3655 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3656 u64 *bytes_to_reserve); 3657 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3658 struct btrfs_pending_snapshot *pending); 3659 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3660 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3661 u64 bytenr); 3662 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3663 3664 /* scrub.c */ 3665 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3666 u64 end, struct btrfs_scrub_progress *progress, 3667 int readonly, int is_dev_replace); 3668 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3669 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3670 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3671 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3672 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3673 struct btrfs_scrub_progress *progress); 3674 static inline void btrfs_init_full_stripe_locks_tree( 3675 struct btrfs_full_stripe_locks_tree *locks_root) 3676 { 3677 locks_root->root = RB_ROOT; 3678 mutex_init(&locks_root->lock); 3679 } 3680 3681 /* dev-replace.c */ 3682 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3683 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3684 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3685 3686 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3687 { 3688 btrfs_bio_counter_sub(fs_info, 1); 3689 } 3690 3691 /* reada.c */ 3692 struct reada_control { 3693 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3694 struct btrfs_key key_start; 3695 struct btrfs_key key_end; /* exclusive */ 3696 atomic_t elems; 3697 struct kref refcnt; 3698 wait_queue_head_t wait; 3699 }; 3700 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3701 struct btrfs_key *start, struct btrfs_key *end); 3702 int btrfs_reada_wait(void *handle); 3703 void btrfs_reada_detach(void *handle); 3704 int btree_readahead_hook(struct extent_buffer *eb, int err); 3705 void btrfs_reada_remove_dev(struct btrfs_device *dev); 3706 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3707 3708 static inline int is_fstree(u64 rootid) 3709 { 3710 if (rootid == BTRFS_FS_TREE_OBJECTID || 3711 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3712 !btrfs_qgroup_level(rootid))) 3713 return 1; 3714 return 0; 3715 } 3716 3717 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3718 { 3719 return signal_pending(current); 3720 } 3721 3722 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3723 3724 /* Sanity test specific functions */ 3725 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3726 void btrfs_test_destroy_inode(struct inode *inode); 3727 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3728 { 3729 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3730 } 3731 #else 3732 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3733 { 3734 return 0; 3735 } 3736 #endif 3737 3738 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info) 3739 { 3740 return fs_info->zoned != 0; 3741 } 3742 3743 #endif 3744