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 /* Track if a transaction abort has been reported on this filesystem */ 135 BTRFS_FS_STATE_TRANS_ABORTED, 136 /* 137 * Bio operations should be blocked on this filesystem because a source 138 * or target device is being destroyed as part of a device replace 139 */ 140 BTRFS_FS_STATE_DEV_REPLACING, 141 /* The btrfs_fs_info created for self-tests */ 142 BTRFS_FS_STATE_DUMMY_FS_INFO, 143 }; 144 145 #define BTRFS_BACKREF_REV_MAX 256 146 #define BTRFS_BACKREF_REV_SHIFT 56 147 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 148 BTRFS_BACKREF_REV_SHIFT) 149 150 #define BTRFS_OLD_BACKREF_REV 0 151 #define BTRFS_MIXED_BACKREF_REV 1 152 153 /* 154 * every tree block (leaf or node) starts with this header. 155 */ 156 struct btrfs_header { 157 /* these first four must match the super block */ 158 u8 csum[BTRFS_CSUM_SIZE]; 159 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 160 __le64 bytenr; /* which block this node is supposed to live in */ 161 __le64 flags; 162 163 /* allowed to be different from the super from here on down */ 164 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 165 __le64 generation; 166 __le64 owner; 167 __le32 nritems; 168 u8 level; 169 } __attribute__ ((__packed__)); 170 171 /* 172 * this is a very generous portion of the super block, giving us 173 * room to translate 14 chunks with 3 stripes each. 174 */ 175 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 176 177 /* 178 * just in case we somehow lose the roots and are not able to mount, 179 * we store an array of the roots from previous transactions 180 * in the super. 181 */ 182 #define BTRFS_NUM_BACKUP_ROOTS 4 183 struct btrfs_root_backup { 184 __le64 tree_root; 185 __le64 tree_root_gen; 186 187 __le64 chunk_root; 188 __le64 chunk_root_gen; 189 190 __le64 extent_root; 191 __le64 extent_root_gen; 192 193 __le64 fs_root; 194 __le64 fs_root_gen; 195 196 __le64 dev_root; 197 __le64 dev_root_gen; 198 199 __le64 csum_root; 200 __le64 csum_root_gen; 201 202 __le64 total_bytes; 203 __le64 bytes_used; 204 __le64 num_devices; 205 /* future */ 206 __le64 unused_64[4]; 207 208 u8 tree_root_level; 209 u8 chunk_root_level; 210 u8 extent_root_level; 211 u8 fs_root_level; 212 u8 dev_root_level; 213 u8 csum_root_level; 214 /* future and to align */ 215 u8 unused_8[10]; 216 } __attribute__ ((__packed__)); 217 218 /* 219 * the super block basically lists the main trees of the FS 220 * it currently lacks any block count etc etc 221 */ 222 struct btrfs_super_block { 223 /* the first 4 fields must match struct btrfs_header */ 224 u8 csum[BTRFS_CSUM_SIZE]; 225 /* FS specific UUID, visible to user */ 226 u8 fsid[BTRFS_FSID_SIZE]; 227 __le64 bytenr; /* this block number */ 228 __le64 flags; 229 230 /* allowed to be different from the btrfs_header from here own down */ 231 __le64 magic; 232 __le64 generation; 233 __le64 root; 234 __le64 chunk_root; 235 __le64 log_root; 236 237 /* this will help find the new super based on the log root */ 238 __le64 log_root_transid; 239 __le64 total_bytes; 240 __le64 bytes_used; 241 __le64 root_dir_objectid; 242 __le64 num_devices; 243 __le32 sectorsize; 244 __le32 nodesize; 245 __le32 __unused_leafsize; 246 __le32 stripesize; 247 __le32 sys_chunk_array_size; 248 __le64 chunk_root_generation; 249 __le64 compat_flags; 250 __le64 compat_ro_flags; 251 __le64 incompat_flags; 252 __le16 csum_type; 253 u8 root_level; 254 u8 chunk_root_level; 255 u8 log_root_level; 256 struct btrfs_dev_item dev_item; 257 258 char label[BTRFS_LABEL_SIZE]; 259 260 __le64 cache_generation; 261 __le64 uuid_tree_generation; 262 263 /* the UUID written into btree blocks */ 264 u8 metadata_uuid[BTRFS_FSID_SIZE]; 265 266 /* future expansion */ 267 __le64 reserved[28]; 268 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 269 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 270 } __attribute__ ((__packed__)); 271 272 /* 273 * Compat flags that we support. If any incompat flags are set other than the 274 * ones specified below then we will fail to mount 275 */ 276 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 277 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 278 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 279 280 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 281 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 282 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 283 284 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 285 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 286 287 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 288 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 289 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 290 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 291 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 292 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 293 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 294 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 295 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 296 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 297 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 298 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 299 BTRFS_FEATURE_INCOMPAT_RAID1C34) 300 301 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 302 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 303 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 304 305 /* 306 * A leaf is full of items. offset and size tell us where to find 307 * the item in the leaf (relative to the start of the data area) 308 */ 309 struct btrfs_item { 310 struct btrfs_disk_key key; 311 __le32 offset; 312 __le32 size; 313 } __attribute__ ((__packed__)); 314 315 /* 316 * leaves have an item area and a data area: 317 * [item0, item1....itemN] [free space] [dataN...data1, data0] 318 * 319 * The data is separate from the items to get the keys closer together 320 * during searches. 321 */ 322 struct btrfs_leaf { 323 struct btrfs_header header; 324 struct btrfs_item items[]; 325 } __attribute__ ((__packed__)); 326 327 /* 328 * all non-leaf blocks are nodes, they hold only keys and pointers to 329 * other blocks 330 */ 331 struct btrfs_key_ptr { 332 struct btrfs_disk_key key; 333 __le64 blockptr; 334 __le64 generation; 335 } __attribute__ ((__packed__)); 336 337 struct btrfs_node { 338 struct btrfs_header header; 339 struct btrfs_key_ptr ptrs[]; 340 } __attribute__ ((__packed__)); 341 342 /* 343 * btrfs_paths remember the path taken from the root down to the leaf. 344 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 345 * to any other levels that are present. 346 * 347 * The slots array records the index of the item or block pointer 348 * used while walking the tree. 349 */ 350 enum { READA_NONE, READA_BACK, READA_FORWARD }; 351 struct btrfs_path { 352 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 353 int slots[BTRFS_MAX_LEVEL]; 354 /* if there is real range locking, this locks field will change */ 355 u8 locks[BTRFS_MAX_LEVEL]; 356 u8 reada; 357 /* keep some upper locks as we walk down */ 358 u8 lowest_level; 359 360 /* 361 * set by btrfs_split_item, tells search_slot to keep all locks 362 * and to force calls to keep space in the nodes 363 */ 364 unsigned int search_for_split:1; 365 unsigned int keep_locks:1; 366 unsigned int skip_locking:1; 367 unsigned int search_commit_root:1; 368 unsigned int need_commit_sem:1; 369 unsigned int skip_release_on_error:1; 370 }; 371 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 372 sizeof(struct btrfs_item)) 373 struct btrfs_dev_replace { 374 u64 replace_state; /* see #define above */ 375 time64_t time_started; /* seconds since 1-Jan-1970 */ 376 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 377 atomic64_t num_write_errors; 378 atomic64_t num_uncorrectable_read_errors; 379 380 u64 cursor_left; 381 u64 committed_cursor_left; 382 u64 cursor_left_last_write_of_item; 383 u64 cursor_right; 384 385 u64 cont_reading_from_srcdev_mode; /* see #define above */ 386 387 int is_valid; 388 int item_needs_writeback; 389 struct btrfs_device *srcdev; 390 struct btrfs_device *tgtdev; 391 392 struct mutex lock_finishing_cancel_unmount; 393 struct rw_semaphore rwsem; 394 395 struct btrfs_scrub_progress scrub_progress; 396 397 struct percpu_counter bio_counter; 398 wait_queue_head_t replace_wait; 399 }; 400 401 /* 402 * free clusters are used to claim free space in relatively large chunks, 403 * allowing us to do less seeky writes. They are used for all metadata 404 * allocations. In ssd_spread mode they are also used for data allocations. 405 */ 406 struct btrfs_free_cluster { 407 spinlock_t lock; 408 spinlock_t refill_lock; 409 struct rb_root root; 410 411 /* largest extent in this cluster */ 412 u64 max_size; 413 414 /* first extent starting offset */ 415 u64 window_start; 416 417 /* We did a full search and couldn't create a cluster */ 418 bool fragmented; 419 420 struct btrfs_block_group *block_group; 421 /* 422 * when a cluster is allocated from a block group, we put the 423 * cluster onto a list in the block group so that it can 424 * be freed before the block group is freed. 425 */ 426 struct list_head block_group_list; 427 }; 428 429 enum btrfs_caching_type { 430 BTRFS_CACHE_NO, 431 BTRFS_CACHE_STARTED, 432 BTRFS_CACHE_FAST, 433 BTRFS_CACHE_FINISHED, 434 BTRFS_CACHE_ERROR, 435 }; 436 437 /* 438 * Tree to record all locked full stripes of a RAID5/6 block group 439 */ 440 struct btrfs_full_stripe_locks_tree { 441 struct rb_root root; 442 struct mutex lock; 443 }; 444 445 /* Discard control. */ 446 /* 447 * Async discard uses multiple lists to differentiate the discard filter 448 * parameters. Index 0 is for completely free block groups where we need to 449 * ensure the entire block group is trimmed without being lossy. Indices 450 * afterwards represent monotonically decreasing discard filter sizes to 451 * prioritize what should be discarded next. 452 */ 453 #define BTRFS_NR_DISCARD_LISTS 3 454 #define BTRFS_DISCARD_INDEX_UNUSED 0 455 #define BTRFS_DISCARD_INDEX_START 1 456 457 struct btrfs_discard_ctl { 458 struct workqueue_struct *discard_workers; 459 struct delayed_work work; 460 spinlock_t lock; 461 struct btrfs_block_group *block_group; 462 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 463 u64 prev_discard; 464 u64 prev_discard_time; 465 atomic_t discardable_extents; 466 atomic64_t discardable_bytes; 467 u64 max_discard_size; 468 u64 delay_ms; 469 u32 iops_limit; 470 u32 kbps_limit; 471 u64 discard_extent_bytes; 472 u64 discard_bitmap_bytes; 473 atomic64_t discard_bytes_saved; 474 }; 475 476 /* delayed seq elem */ 477 struct seq_list { 478 struct list_head list; 479 u64 seq; 480 }; 481 482 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 483 484 #define SEQ_LAST ((u64)-1) 485 486 enum btrfs_orphan_cleanup_state { 487 ORPHAN_CLEANUP_STARTED = 1, 488 ORPHAN_CLEANUP_DONE = 2, 489 }; 490 491 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info); 492 493 /* fs_info */ 494 struct reloc_control; 495 struct btrfs_device; 496 struct btrfs_fs_devices; 497 struct btrfs_balance_control; 498 struct btrfs_delayed_root; 499 500 /* 501 * Block group or device which contains an active swapfile. Used for preventing 502 * unsafe operations while a swapfile is active. 503 * 504 * These are sorted on (ptr, inode) (note that a block group or device can 505 * contain more than one swapfile). We compare the pointer values because we 506 * don't actually care what the object is, we just need a quick check whether 507 * the object exists in the rbtree. 508 */ 509 struct btrfs_swapfile_pin { 510 struct rb_node node; 511 void *ptr; 512 struct inode *inode; 513 /* 514 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 515 * points to a struct btrfs_device. 516 */ 517 bool is_block_group; 518 }; 519 520 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 521 522 enum { 523 BTRFS_FS_BARRIER, 524 BTRFS_FS_CLOSING_START, 525 BTRFS_FS_CLOSING_DONE, 526 BTRFS_FS_LOG_RECOVERING, 527 BTRFS_FS_OPEN, 528 BTRFS_FS_QUOTA_ENABLED, 529 BTRFS_FS_UPDATE_UUID_TREE_GEN, 530 BTRFS_FS_CREATING_FREE_SPACE_TREE, 531 BTRFS_FS_BTREE_ERR, 532 BTRFS_FS_LOG1_ERR, 533 BTRFS_FS_LOG2_ERR, 534 BTRFS_FS_QUOTA_OVERRIDE, 535 /* Used to record internally whether fs has been frozen */ 536 BTRFS_FS_FROZEN, 537 /* 538 * Indicate that balance has been set up from the ioctl and is in the 539 * main phase. The fs_info::balance_ctl is initialized. 540 * Set and cleared while holding fs_info::balance_mutex. 541 */ 542 BTRFS_FS_BALANCE_RUNNING, 543 544 /* Indicate that the cleaner thread is awake and doing something. */ 545 BTRFS_FS_CLEANER_RUNNING, 546 547 /* 548 * The checksumming has an optimized version and is considered fast, 549 * so we don't need to offload checksums to workqueues. 550 */ 551 BTRFS_FS_CSUM_IMPL_FAST, 552 553 /* Indicate that the discard workqueue can service discards. */ 554 BTRFS_FS_DISCARD_RUNNING, 555 556 /* Indicate that we need to cleanup space cache v1 */ 557 BTRFS_FS_CLEANUP_SPACE_CACHE_V1, 558 }; 559 560 /* 561 * Exclusive operations (device replace, resize, device add/remove, balance) 562 */ 563 enum btrfs_exclusive_operation { 564 BTRFS_EXCLOP_NONE, 565 BTRFS_EXCLOP_BALANCE, 566 BTRFS_EXCLOP_DEV_ADD, 567 BTRFS_EXCLOP_DEV_REMOVE, 568 BTRFS_EXCLOP_DEV_REPLACE, 569 BTRFS_EXCLOP_RESIZE, 570 BTRFS_EXCLOP_SWAP_ACTIVATE, 571 }; 572 573 struct btrfs_fs_info { 574 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 575 unsigned long flags; 576 struct btrfs_root *extent_root; 577 struct btrfs_root *tree_root; 578 struct btrfs_root *chunk_root; 579 struct btrfs_root *dev_root; 580 struct btrfs_root *fs_root; 581 struct btrfs_root *csum_root; 582 struct btrfs_root *quota_root; 583 struct btrfs_root *uuid_root; 584 struct btrfs_root *free_space_root; 585 struct btrfs_root *data_reloc_root; 586 587 /* the log root tree is a directory of all the other log roots */ 588 struct btrfs_root *log_root_tree; 589 590 spinlock_t fs_roots_radix_lock; 591 struct radix_tree_root fs_roots_radix; 592 593 /* block group cache stuff */ 594 spinlock_t block_group_cache_lock; 595 u64 first_logical_byte; 596 struct rb_root block_group_cache_tree; 597 598 /* keep track of unallocated space */ 599 atomic64_t free_chunk_space; 600 601 /* Track ranges which are used by log trees blocks/logged data extents */ 602 struct extent_io_tree excluded_extents; 603 604 /* logical->physical extent mapping */ 605 struct extent_map_tree mapping_tree; 606 607 /* 608 * block reservation for extent, checksum, root tree and 609 * delayed dir index item 610 */ 611 struct btrfs_block_rsv global_block_rsv; 612 /* block reservation for metadata operations */ 613 struct btrfs_block_rsv trans_block_rsv; 614 /* block reservation for chunk tree */ 615 struct btrfs_block_rsv chunk_block_rsv; 616 /* block reservation for delayed operations */ 617 struct btrfs_block_rsv delayed_block_rsv; 618 /* block reservation for delayed refs */ 619 struct btrfs_block_rsv delayed_refs_rsv; 620 621 struct btrfs_block_rsv empty_block_rsv; 622 623 u64 generation; 624 u64 last_trans_committed; 625 u64 avg_delayed_ref_runtime; 626 627 /* 628 * this is updated to the current trans every time a full commit 629 * is required instead of the faster short fsync log commits 630 */ 631 u64 last_trans_log_full_commit; 632 unsigned long mount_opt; 633 /* 634 * Track requests for actions that need to be done during transaction 635 * commit (like for some mount options). 636 */ 637 unsigned long pending_changes; 638 unsigned long compress_type:4; 639 unsigned int compress_level; 640 u32 commit_interval; 641 /* 642 * It is a suggestive number, the read side is safe even it gets a 643 * wrong number because we will write out the data into a regular 644 * extent. The write side(mount/remount) is under ->s_umount lock, 645 * so it is also safe. 646 */ 647 u64 max_inline; 648 649 struct btrfs_transaction *running_transaction; 650 wait_queue_head_t transaction_throttle; 651 wait_queue_head_t transaction_wait; 652 wait_queue_head_t transaction_blocked_wait; 653 wait_queue_head_t async_submit_wait; 654 655 /* 656 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 657 * when they are updated. 658 * 659 * Because we do not clear the flags for ever, so we needn't use 660 * the lock on the read side. 661 * 662 * We also needn't use the lock when we mount the fs, because 663 * there is no other task which will update the flag. 664 */ 665 spinlock_t super_lock; 666 struct btrfs_super_block *super_copy; 667 struct btrfs_super_block *super_for_commit; 668 struct super_block *sb; 669 struct inode *btree_inode; 670 struct mutex tree_log_mutex; 671 struct mutex transaction_kthread_mutex; 672 struct mutex cleaner_mutex; 673 struct mutex chunk_mutex; 674 675 /* 676 * this is taken to make sure we don't set block groups ro after 677 * the free space cache has been allocated on them 678 */ 679 struct mutex ro_block_group_mutex; 680 681 /* this is used during read/modify/write to make sure 682 * no two ios are trying to mod the same stripe at the same 683 * time 684 */ 685 struct btrfs_stripe_hash_table *stripe_hash_table; 686 687 /* 688 * this protects the ordered operations list only while we are 689 * processing all of the entries on it. This way we make 690 * sure the commit code doesn't find the list temporarily empty 691 * because another function happens to be doing non-waiting preflush 692 * before jumping into the main commit. 693 */ 694 struct mutex ordered_operations_mutex; 695 696 struct rw_semaphore commit_root_sem; 697 698 struct rw_semaphore cleanup_work_sem; 699 700 struct rw_semaphore subvol_sem; 701 702 spinlock_t trans_lock; 703 /* 704 * the reloc mutex goes with the trans lock, it is taken 705 * during commit to protect us from the relocation code 706 */ 707 struct mutex reloc_mutex; 708 709 struct list_head trans_list; 710 struct list_head dead_roots; 711 struct list_head caching_block_groups; 712 713 spinlock_t delayed_iput_lock; 714 struct list_head delayed_iputs; 715 atomic_t nr_delayed_iputs; 716 wait_queue_head_t delayed_iputs_wait; 717 718 atomic64_t tree_mod_seq; 719 720 /* this protects tree_mod_log and tree_mod_seq_list */ 721 rwlock_t tree_mod_log_lock; 722 struct rb_root tree_mod_log; 723 struct list_head tree_mod_seq_list; 724 725 atomic_t async_delalloc_pages; 726 727 /* 728 * this is used to protect the following list -- ordered_roots. 729 */ 730 spinlock_t ordered_root_lock; 731 732 /* 733 * all fs/file tree roots in which there are data=ordered extents 734 * pending writeback are added into this list. 735 * 736 * these can span multiple transactions and basically include 737 * every dirty data page that isn't from nodatacow 738 */ 739 struct list_head ordered_roots; 740 741 struct mutex delalloc_root_mutex; 742 spinlock_t delalloc_root_lock; 743 /* all fs/file tree roots that have delalloc inodes. */ 744 struct list_head delalloc_roots; 745 746 /* 747 * there is a pool of worker threads for checksumming during writes 748 * and a pool for checksumming after reads. This is because readers 749 * can run with FS locks held, and the writers may be waiting for 750 * those locks. We don't want ordering in the pending list to cause 751 * deadlocks, and so the two are serviced separately. 752 * 753 * A third pool does submit_bio to avoid deadlocking with the other 754 * two 755 */ 756 struct btrfs_workqueue *workers; 757 struct btrfs_workqueue *delalloc_workers; 758 struct btrfs_workqueue *flush_workers; 759 struct btrfs_workqueue *endio_workers; 760 struct btrfs_workqueue *endio_meta_workers; 761 struct btrfs_workqueue *endio_raid56_workers; 762 struct btrfs_workqueue *rmw_workers; 763 struct btrfs_workqueue *endio_meta_write_workers; 764 struct btrfs_workqueue *endio_write_workers; 765 struct btrfs_workqueue *endio_freespace_worker; 766 struct btrfs_workqueue *caching_workers; 767 struct btrfs_workqueue *readahead_workers; 768 769 /* 770 * fixup workers take dirty pages that didn't properly go through 771 * the cow mechanism and make them safe to write. It happens 772 * for the sys_munmap function call path 773 */ 774 struct btrfs_workqueue *fixup_workers; 775 struct btrfs_workqueue *delayed_workers; 776 777 struct task_struct *transaction_kthread; 778 struct task_struct *cleaner_kthread; 779 u32 thread_pool_size; 780 781 struct kobject *space_info_kobj; 782 struct kobject *qgroups_kobj; 783 784 u64 total_pinned; 785 786 /* used to keep from writing metadata until there is a nice batch */ 787 struct percpu_counter dirty_metadata_bytes; 788 struct percpu_counter delalloc_bytes; 789 struct percpu_counter dio_bytes; 790 s32 dirty_metadata_batch; 791 s32 delalloc_batch; 792 793 struct list_head dirty_cowonly_roots; 794 795 struct btrfs_fs_devices *fs_devices; 796 797 /* 798 * The space_info list is effectively read only after initial 799 * setup. It is populated at mount time and cleaned up after 800 * all block groups are removed. RCU is used to protect it. 801 */ 802 struct list_head space_info; 803 804 struct btrfs_space_info *data_sinfo; 805 806 struct reloc_control *reloc_ctl; 807 808 /* data_alloc_cluster is only used in ssd_spread mode */ 809 struct btrfs_free_cluster data_alloc_cluster; 810 811 /* all metadata allocations go through this cluster */ 812 struct btrfs_free_cluster meta_alloc_cluster; 813 814 /* auto defrag inodes go here */ 815 spinlock_t defrag_inodes_lock; 816 struct rb_root defrag_inodes; 817 atomic_t defrag_running; 818 819 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 820 seqlock_t profiles_lock; 821 /* 822 * these three are in extended format (availability of single 823 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 824 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 825 */ 826 u64 avail_data_alloc_bits; 827 u64 avail_metadata_alloc_bits; 828 u64 avail_system_alloc_bits; 829 830 /* restriper state */ 831 spinlock_t balance_lock; 832 struct mutex balance_mutex; 833 atomic_t balance_pause_req; 834 atomic_t balance_cancel_req; 835 struct btrfs_balance_control *balance_ctl; 836 wait_queue_head_t balance_wait_q; 837 838 u32 data_chunk_allocations; 839 u32 metadata_ratio; 840 841 void *bdev_holder; 842 843 /* private scrub information */ 844 struct mutex scrub_lock; 845 atomic_t scrubs_running; 846 atomic_t scrub_pause_req; 847 atomic_t scrubs_paused; 848 atomic_t scrub_cancel_req; 849 wait_queue_head_t scrub_pause_wait; 850 /* 851 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 852 * running. 853 */ 854 refcount_t scrub_workers_refcnt; 855 struct btrfs_workqueue *scrub_workers; 856 struct btrfs_workqueue *scrub_wr_completion_workers; 857 struct btrfs_workqueue *scrub_parity_workers; 858 859 struct btrfs_discard_ctl discard_ctl; 860 861 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 862 u32 check_integrity_print_mask; 863 #endif 864 /* is qgroup tracking in a consistent state? */ 865 u64 qgroup_flags; 866 867 /* holds configuration and tracking. Protected by qgroup_lock */ 868 struct rb_root qgroup_tree; 869 spinlock_t qgroup_lock; 870 871 /* 872 * used to avoid frequently calling ulist_alloc()/ulist_free() 873 * when doing qgroup accounting, it must be protected by qgroup_lock. 874 */ 875 struct ulist *qgroup_ulist; 876 877 /* 878 * Protect user change for quota operations. If a transaction is needed, 879 * it must be started before locking this lock. 880 */ 881 struct mutex qgroup_ioctl_lock; 882 883 /* list of dirty qgroups to be written at next commit */ 884 struct list_head dirty_qgroups; 885 886 /* used by qgroup for an efficient tree traversal */ 887 u64 qgroup_seq; 888 889 /* qgroup rescan items */ 890 struct mutex qgroup_rescan_lock; /* protects the progress item */ 891 struct btrfs_key qgroup_rescan_progress; 892 struct btrfs_workqueue *qgroup_rescan_workers; 893 struct completion qgroup_rescan_completion; 894 struct btrfs_work qgroup_rescan_work; 895 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 896 897 /* filesystem state */ 898 unsigned long fs_state; 899 900 struct btrfs_delayed_root *delayed_root; 901 902 /* readahead tree */ 903 spinlock_t reada_lock; 904 struct radix_tree_root reada_tree; 905 906 /* readahead works cnt */ 907 atomic_t reada_works_cnt; 908 909 /* Extent buffer radix tree */ 910 spinlock_t buffer_lock; 911 /* Entries are eb->start / sectorsize */ 912 struct radix_tree_root buffer_radix; 913 914 /* next backup root to be overwritten */ 915 int backup_root_index; 916 917 /* device replace state */ 918 struct btrfs_dev_replace dev_replace; 919 920 struct semaphore uuid_tree_rescan_sem; 921 922 /* Used to reclaim the metadata space in the background. */ 923 struct work_struct async_reclaim_work; 924 struct work_struct async_data_reclaim_work; 925 926 spinlock_t unused_bgs_lock; 927 struct list_head unused_bgs; 928 struct mutex unused_bg_unpin_mutex; 929 struct mutex delete_unused_bgs_mutex; 930 931 /* Cached block sizes */ 932 u32 nodesize; 933 u32 sectorsize; 934 /* ilog2 of sectorsize, use to avoid 64bit division */ 935 u32 sectorsize_bits; 936 u32 csum_size; 937 u32 csums_per_leaf; 938 u32 stripesize; 939 940 /* Block groups and devices containing active swapfiles. */ 941 spinlock_t swapfile_pins_lock; 942 struct rb_root swapfile_pins; 943 944 struct crypto_shash *csum_shash; 945 946 /* 947 * Number of send operations in progress. 948 * Updated while holding fs_info::balance_mutex. 949 */ 950 int send_in_progress; 951 952 /* Type of exclusive operation running */ 953 unsigned long exclusive_operation; 954 955 /* 956 * Zone size > 0 when in ZONED mode, otherwise it's used for a check 957 * if the mode is enabled 958 */ 959 union { 960 u64 zone_size; 961 u64 zoned; 962 }; 963 964 /* Max size to emit ZONE_APPEND write command */ 965 u64 max_zone_append_size; 966 967 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 968 spinlock_t ref_verify_lock; 969 struct rb_root block_tree; 970 #endif 971 972 #ifdef CONFIG_BTRFS_DEBUG 973 struct kobject *debug_kobj; 974 struct kobject *discard_debug_kobj; 975 struct list_head allocated_roots; 976 977 spinlock_t eb_leak_lock; 978 struct list_head allocated_ebs; 979 #endif 980 }; 981 982 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 983 { 984 return sb->s_fs_info; 985 } 986 987 /* 988 * The state of btrfs root 989 */ 990 enum { 991 /* 992 * btrfs_record_root_in_trans is a multi-step process, and it can race 993 * with the balancing code. But the race is very small, and only the 994 * first time the root is added to each transaction. So IN_TRANS_SETUP 995 * is used to tell us when more checks are required 996 */ 997 BTRFS_ROOT_IN_TRANS_SETUP, 998 999 /* 1000 * Set if tree blocks of this root can be shared by other roots. 1001 * Only subvolume trees and their reloc trees have this bit set. 1002 * Conflicts with TRACK_DIRTY bit. 1003 * 1004 * This affects two things: 1005 * 1006 * - How balance works 1007 * For shareable roots, we need to use reloc tree and do path 1008 * replacement for balance, and need various pre/post hooks for 1009 * snapshot creation to handle them. 1010 * 1011 * While for non-shareable trees, we just simply do a tree search 1012 * with COW. 1013 * 1014 * - How dirty roots are tracked 1015 * For shareable roots, btrfs_record_root_in_trans() is needed to 1016 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1017 * don't need to set this manually. 1018 */ 1019 BTRFS_ROOT_SHAREABLE, 1020 BTRFS_ROOT_TRACK_DIRTY, 1021 BTRFS_ROOT_IN_RADIX, 1022 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1023 BTRFS_ROOT_DEFRAG_RUNNING, 1024 BTRFS_ROOT_FORCE_COW, 1025 BTRFS_ROOT_MULTI_LOG_TASKS, 1026 BTRFS_ROOT_DIRTY, 1027 BTRFS_ROOT_DELETING, 1028 1029 /* 1030 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1031 * 1032 * Set for the subvolume tree owning the reloc tree. 1033 */ 1034 BTRFS_ROOT_DEAD_RELOC_TREE, 1035 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1036 BTRFS_ROOT_DEAD_TREE, 1037 /* The root has a log tree. Used for subvolume roots and the tree root. */ 1038 BTRFS_ROOT_HAS_LOG_TREE, 1039 /* Qgroup flushing is in progress */ 1040 BTRFS_ROOT_QGROUP_FLUSHING, 1041 }; 1042 1043 /* 1044 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1045 * code. For detail check comment in fs/btrfs/qgroup.c. 1046 */ 1047 struct btrfs_qgroup_swapped_blocks { 1048 spinlock_t lock; 1049 /* RM_EMPTY_ROOT() of above blocks[] */ 1050 bool swapped; 1051 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1052 }; 1053 1054 /* 1055 * in ram representation of the tree. extent_root is used for all allocations 1056 * and for the extent tree extent_root root. 1057 */ 1058 struct btrfs_root { 1059 struct extent_buffer *node; 1060 1061 struct extent_buffer *commit_root; 1062 struct btrfs_root *log_root; 1063 struct btrfs_root *reloc_root; 1064 1065 unsigned long state; 1066 struct btrfs_root_item root_item; 1067 struct btrfs_key root_key; 1068 struct btrfs_fs_info *fs_info; 1069 struct extent_io_tree dirty_log_pages; 1070 1071 struct mutex objectid_mutex; 1072 1073 spinlock_t accounting_lock; 1074 struct btrfs_block_rsv *block_rsv; 1075 1076 struct mutex log_mutex; 1077 wait_queue_head_t log_writer_wait; 1078 wait_queue_head_t log_commit_wait[2]; 1079 struct list_head log_ctxs[2]; 1080 /* Used only for log trees of subvolumes, not for the log root tree */ 1081 atomic_t log_writers; 1082 atomic_t log_commit[2]; 1083 /* Used only for log trees of subvolumes, not for the log root tree */ 1084 atomic_t log_batch; 1085 int log_transid; 1086 /* No matter the commit succeeds or not*/ 1087 int log_transid_committed; 1088 /* Just be updated when the commit succeeds. */ 1089 int last_log_commit; 1090 pid_t log_start_pid; 1091 1092 u64 last_trans; 1093 1094 u32 type; 1095 1096 u64 highest_objectid; 1097 1098 struct btrfs_key defrag_progress; 1099 struct btrfs_key defrag_max; 1100 1101 /* The dirty list is only used by non-shareable roots */ 1102 struct list_head dirty_list; 1103 1104 struct list_head root_list; 1105 1106 spinlock_t log_extents_lock[2]; 1107 struct list_head logged_list[2]; 1108 1109 int orphan_cleanup_state; 1110 1111 spinlock_t inode_lock; 1112 /* red-black tree that keeps track of in-memory inodes */ 1113 struct rb_root inode_tree; 1114 1115 /* 1116 * radix tree that keeps track of delayed nodes of every inode, 1117 * protected by inode_lock 1118 */ 1119 struct radix_tree_root delayed_nodes_tree; 1120 /* 1121 * right now this just gets used so that a root has its own devid 1122 * for stat. It may be used for more later 1123 */ 1124 dev_t anon_dev; 1125 1126 spinlock_t root_item_lock; 1127 refcount_t refs; 1128 1129 struct mutex delalloc_mutex; 1130 spinlock_t delalloc_lock; 1131 /* 1132 * all of the inodes that have delalloc bytes. It is possible for 1133 * this list to be empty even when there is still dirty data=ordered 1134 * extents waiting to finish IO. 1135 */ 1136 struct list_head delalloc_inodes; 1137 struct list_head delalloc_root; 1138 u64 nr_delalloc_inodes; 1139 1140 struct mutex ordered_extent_mutex; 1141 /* 1142 * this is used by the balancing code to wait for all the pending 1143 * ordered extents 1144 */ 1145 spinlock_t ordered_extent_lock; 1146 1147 /* 1148 * all of the data=ordered extents pending writeback 1149 * these can span multiple transactions and basically include 1150 * every dirty data page that isn't from nodatacow 1151 */ 1152 struct list_head ordered_extents; 1153 struct list_head ordered_root; 1154 u64 nr_ordered_extents; 1155 1156 /* 1157 * Not empty if this subvolume root has gone through tree block swap 1158 * (relocation) 1159 * 1160 * Will be used by reloc_control::dirty_subvol_roots. 1161 */ 1162 struct list_head reloc_dirty_list; 1163 1164 /* 1165 * Number of currently running SEND ioctls to prevent 1166 * manipulation with the read-only status via SUBVOL_SETFLAGS 1167 */ 1168 int send_in_progress; 1169 /* 1170 * Number of currently running deduplication operations that have a 1171 * destination inode belonging to this root. Protected by the lock 1172 * root_item_lock. 1173 */ 1174 int dedupe_in_progress; 1175 /* For exclusion of snapshot creation and nocow writes */ 1176 struct btrfs_drew_lock snapshot_lock; 1177 1178 atomic_t snapshot_force_cow; 1179 1180 /* For qgroup metadata reserved space */ 1181 spinlock_t qgroup_meta_rsv_lock; 1182 u64 qgroup_meta_rsv_pertrans; 1183 u64 qgroup_meta_rsv_prealloc; 1184 wait_queue_head_t qgroup_flush_wait; 1185 1186 /* Number of active swapfiles */ 1187 atomic_t nr_swapfiles; 1188 1189 /* Record pairs of swapped blocks for qgroup */ 1190 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1191 1192 /* Used only by log trees, when logging csum items */ 1193 struct extent_io_tree log_csum_range; 1194 1195 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1196 u64 alloc_bytenr; 1197 #endif 1198 1199 #ifdef CONFIG_BTRFS_DEBUG 1200 struct list_head leak_list; 1201 #endif 1202 }; 1203 1204 /* 1205 * Structure that conveys information about an extent that is going to replace 1206 * all the extents in a file range. 1207 */ 1208 struct btrfs_replace_extent_info { 1209 u64 disk_offset; 1210 u64 disk_len; 1211 u64 data_offset; 1212 u64 data_len; 1213 u64 file_offset; 1214 /* Pointer to a file extent item of type regular or prealloc. */ 1215 char *extent_buf; 1216 /* 1217 * Set to true when attempting to replace a file range with a new extent 1218 * described by this structure, set to false when attempting to clone an 1219 * existing extent into a file range. 1220 */ 1221 bool is_new_extent; 1222 /* Meaningful only if is_new_extent is true. */ 1223 int qgroup_reserved; 1224 /* 1225 * Meaningful only if is_new_extent is true. 1226 * Used to track how many extent items we have already inserted in a 1227 * subvolume tree that refer to the extent described by this structure, 1228 * so that we know when to create a new delayed ref or update an existing 1229 * one. 1230 */ 1231 int insertions; 1232 }; 1233 1234 /* Arguments for btrfs_drop_extents() */ 1235 struct btrfs_drop_extents_args { 1236 /* Input parameters */ 1237 1238 /* 1239 * If NULL, btrfs_drop_extents() will allocate and free its own path. 1240 * If 'replace_extent' is true, this must not be NULL. Also the path 1241 * is always released except if 'replace_extent' is true and 1242 * btrfs_drop_extents() sets 'extent_inserted' to true, in which case 1243 * the path is kept locked. 1244 */ 1245 struct btrfs_path *path; 1246 /* Start offset of the range to drop extents from */ 1247 u64 start; 1248 /* End (exclusive, last byte + 1) of the range to drop extents from */ 1249 u64 end; 1250 /* If true drop all the extent maps in the range */ 1251 bool drop_cache; 1252 /* 1253 * If true it means we want to insert a new extent after dropping all 1254 * the extents in the range. If this is true, the 'extent_item_size' 1255 * parameter must be set as well and the 'extent_inserted' field will 1256 * be set to true by btrfs_drop_extents() if it could insert the new 1257 * extent. 1258 * Note: when this is set to true the path must not be NULL. 1259 */ 1260 bool replace_extent; 1261 /* 1262 * Used if 'replace_extent' is true. Size of the file extent item to 1263 * insert after dropping all existing extents in the range 1264 */ 1265 u32 extent_item_size; 1266 1267 /* Output parameters */ 1268 1269 /* 1270 * Set to the minimum between the input parameter 'end' and the end 1271 * (exclusive, last byte + 1) of the last dropped extent. This is always 1272 * set even if btrfs_drop_extents() returns an error. 1273 */ 1274 u64 drop_end; 1275 /* 1276 * The number of allocated bytes found in the range. This can be smaller 1277 * than the range's length when there are holes in the range. 1278 */ 1279 u64 bytes_found; 1280 /* 1281 * Only set if 'replace_extent' is true. Set to true if we were able 1282 * to insert a replacement extent after dropping all extents in the 1283 * range, otherwise set to false by btrfs_drop_extents(). 1284 * Also, if btrfs_drop_extents() has set this to true it means it 1285 * returned with the path locked, otherwise if it has set this to 1286 * false it has returned with the path released. 1287 */ 1288 bool extent_inserted; 1289 }; 1290 1291 struct btrfs_file_private { 1292 void *filldir_buf; 1293 }; 1294 1295 1296 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1297 { 1298 1299 return info->nodesize - sizeof(struct btrfs_header); 1300 } 1301 1302 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1303 1304 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1305 { 1306 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1307 } 1308 1309 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1310 { 1311 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1312 } 1313 1314 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1315 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1316 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1317 { 1318 return BTRFS_MAX_ITEM_SIZE(info) - 1319 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1320 } 1321 1322 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1323 { 1324 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1325 } 1326 1327 /* 1328 * Flags for mount options. 1329 * 1330 * Note: don't forget to add new options to btrfs_show_options() 1331 */ 1332 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1333 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1334 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1335 #define BTRFS_MOUNT_SSD (1 << 3) 1336 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1337 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1338 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1339 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1340 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1341 #define BTRFS_MOUNT_NOSSD (1 << 9) 1342 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1343 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1344 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1345 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1346 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1347 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1348 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1349 /* bit 17 is free */ 1350 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1351 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1352 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1353 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1354 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1355 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1356 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1357 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1358 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1359 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1360 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1361 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1362 #define BTRFS_MOUNT_IGNOREBADROOTS (1 << 30) 1363 #define BTRFS_MOUNT_IGNOREDATACSUMS (1 << 31) 1364 1365 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1366 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1367 1368 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1369 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1370 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1371 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1372 BTRFS_MOUNT_##opt) 1373 1374 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1375 do { \ 1376 if (!btrfs_test_opt(fs_info, opt)) \ 1377 btrfs_info(fs_info, fmt, ##args); \ 1378 btrfs_set_opt(fs_info->mount_opt, opt); \ 1379 } while (0) 1380 1381 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1382 do { \ 1383 if (btrfs_test_opt(fs_info, opt)) \ 1384 btrfs_info(fs_info, fmt, ##args); \ 1385 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1386 } while (0) 1387 1388 /* 1389 * Requests for changes that need to be done during transaction commit. 1390 * 1391 * Internal mount options that are used for special handling of the real 1392 * mount options (eg. cannot be set during remount and have to be set during 1393 * transaction commit) 1394 */ 1395 1396 #define BTRFS_PENDING_COMMIT (0) 1397 1398 #define btrfs_test_pending(info, opt) \ 1399 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1400 #define btrfs_set_pending(info, opt) \ 1401 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1402 #define btrfs_clear_pending(info, opt) \ 1403 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1404 1405 /* 1406 * Helpers for setting pending mount option changes. 1407 * 1408 * Expects corresponding macros 1409 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1410 */ 1411 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1412 do { \ 1413 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1414 btrfs_info((info), fmt, ##args); \ 1415 btrfs_set_pending((info), SET_##opt); \ 1416 btrfs_clear_pending((info), CLEAR_##opt); \ 1417 } \ 1418 } while(0) 1419 1420 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1421 do { \ 1422 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1423 btrfs_info((info), fmt, ##args); \ 1424 btrfs_set_pending((info), CLEAR_##opt); \ 1425 btrfs_clear_pending((info), SET_##opt); \ 1426 } \ 1427 } while(0) 1428 1429 /* 1430 * Inode flags 1431 */ 1432 #define BTRFS_INODE_NODATASUM (1 << 0) 1433 #define BTRFS_INODE_NODATACOW (1 << 1) 1434 #define BTRFS_INODE_READONLY (1 << 2) 1435 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1436 #define BTRFS_INODE_PREALLOC (1 << 4) 1437 #define BTRFS_INODE_SYNC (1 << 5) 1438 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1439 #define BTRFS_INODE_APPEND (1 << 7) 1440 #define BTRFS_INODE_NODUMP (1 << 8) 1441 #define BTRFS_INODE_NOATIME (1 << 9) 1442 #define BTRFS_INODE_DIRSYNC (1 << 10) 1443 #define BTRFS_INODE_COMPRESS (1 << 11) 1444 1445 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1446 1447 #define BTRFS_INODE_FLAG_MASK \ 1448 (BTRFS_INODE_NODATASUM | \ 1449 BTRFS_INODE_NODATACOW | \ 1450 BTRFS_INODE_READONLY | \ 1451 BTRFS_INODE_NOCOMPRESS | \ 1452 BTRFS_INODE_PREALLOC | \ 1453 BTRFS_INODE_SYNC | \ 1454 BTRFS_INODE_IMMUTABLE | \ 1455 BTRFS_INODE_APPEND | \ 1456 BTRFS_INODE_NODUMP | \ 1457 BTRFS_INODE_NOATIME | \ 1458 BTRFS_INODE_DIRSYNC | \ 1459 BTRFS_INODE_COMPRESS | \ 1460 BTRFS_INODE_ROOT_ITEM_INIT) 1461 1462 struct btrfs_map_token { 1463 struct extent_buffer *eb; 1464 char *kaddr; 1465 unsigned long offset; 1466 }; 1467 1468 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1469 ((bytes) >> (fs_info)->sectorsize_bits) 1470 1471 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1472 struct extent_buffer *eb) 1473 { 1474 token->eb = eb; 1475 token->kaddr = page_address(eb->pages[0]); 1476 token->offset = 0; 1477 } 1478 1479 /* some macros to generate set/get functions for the struct fields. This 1480 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1481 * one for u8: 1482 */ 1483 #define le8_to_cpu(v) (v) 1484 #define cpu_to_le8(v) (v) 1485 #define __le8 u8 1486 1487 static inline u8 get_unaligned_le8(const void *p) 1488 { 1489 return *(u8 *)p; 1490 } 1491 1492 static inline void put_unaligned_le8(u8 val, void *p) 1493 { 1494 *(u8 *)p = val; 1495 } 1496 1497 #define read_eb_member(eb, ptr, type, member, result) (\ 1498 read_extent_buffer(eb, (char *)(result), \ 1499 ((unsigned long)(ptr)) + \ 1500 offsetof(type, member), \ 1501 sizeof(((type *)0)->member))) 1502 1503 #define write_eb_member(eb, ptr, type, member, result) (\ 1504 write_extent_buffer(eb, (char *)(result), \ 1505 ((unsigned long)(ptr)) + \ 1506 offsetof(type, member), \ 1507 sizeof(((type *)0)->member))) 1508 1509 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1510 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1511 const void *ptr, unsigned long off); \ 1512 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1513 const void *ptr, unsigned long off, \ 1514 u##bits val); \ 1515 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1516 const void *ptr, unsigned long off); \ 1517 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1518 unsigned long off, u##bits val); 1519 1520 DECLARE_BTRFS_SETGET_BITS(8) 1521 DECLARE_BTRFS_SETGET_BITS(16) 1522 DECLARE_BTRFS_SETGET_BITS(32) 1523 DECLARE_BTRFS_SETGET_BITS(64) 1524 1525 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1526 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1527 const type *s) \ 1528 { \ 1529 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1530 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1531 } \ 1532 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1533 u##bits val) \ 1534 { \ 1535 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1536 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1537 } \ 1538 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1539 const type *s) \ 1540 { \ 1541 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1542 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1543 } \ 1544 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1545 type *s, u##bits val) \ 1546 { \ 1547 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1548 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1549 } 1550 1551 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1552 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1553 { \ 1554 const type *p = page_address(eb->pages[0]) + \ 1555 offset_in_page(eb->start); \ 1556 return get_unaligned_le##bits(&p->member); \ 1557 } \ 1558 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1559 u##bits val) \ 1560 { \ 1561 type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \ 1562 put_unaligned_le##bits(val, &p->member); \ 1563 } 1564 1565 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1566 static inline u##bits btrfs_##name(const type *s) \ 1567 { \ 1568 return get_unaligned_le##bits(&s->member); \ 1569 } \ 1570 static inline void btrfs_set_##name(type *s, u##bits val) \ 1571 { \ 1572 put_unaligned_le##bits(val, &s->member); \ 1573 } 1574 1575 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1576 struct btrfs_dev_item *s) 1577 { 1578 BUILD_BUG_ON(sizeof(u64) != 1579 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1580 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1581 total_bytes)); 1582 } 1583 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1584 struct btrfs_dev_item *s, 1585 u64 val) 1586 { 1587 BUILD_BUG_ON(sizeof(u64) != 1588 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1589 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1590 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1591 } 1592 1593 1594 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1595 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1596 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1597 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1598 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1599 start_offset, 64); 1600 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1601 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1602 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1603 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1604 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1605 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1606 1607 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1608 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1609 total_bytes, 64); 1610 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1611 bytes_used, 64); 1612 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1613 io_align, 32); 1614 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1615 io_width, 32); 1616 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1617 sector_size, 32); 1618 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1619 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1620 dev_group, 32); 1621 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1622 seek_speed, 8); 1623 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1624 bandwidth, 8); 1625 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1626 generation, 64); 1627 1628 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1629 { 1630 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1631 } 1632 1633 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1634 { 1635 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1636 } 1637 1638 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1639 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1640 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1641 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1642 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1643 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1644 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1645 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1646 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1647 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1648 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1649 1650 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1651 { 1652 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1653 } 1654 1655 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1656 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1657 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1658 stripe_len, 64); 1659 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1660 io_align, 32); 1661 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1662 io_width, 32); 1663 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1664 sector_size, 32); 1665 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1666 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1667 num_stripes, 16); 1668 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1669 sub_stripes, 16); 1670 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1671 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1672 1673 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1674 int nr) 1675 { 1676 unsigned long offset = (unsigned long)c; 1677 offset += offsetof(struct btrfs_chunk, stripe); 1678 offset += nr * sizeof(struct btrfs_stripe); 1679 return (struct btrfs_stripe *)offset; 1680 } 1681 1682 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1683 { 1684 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1685 } 1686 1687 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1688 struct btrfs_chunk *c, int nr) 1689 { 1690 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1691 } 1692 1693 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1694 struct btrfs_chunk *c, int nr) 1695 { 1696 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1697 } 1698 1699 /* struct btrfs_block_group_item */ 1700 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1701 used, 64); 1702 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1703 used, 64); 1704 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1705 struct btrfs_block_group_item, chunk_objectid, 64); 1706 1707 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1708 struct btrfs_block_group_item, chunk_objectid, 64); 1709 BTRFS_SETGET_FUNCS(block_group_flags, 1710 struct btrfs_block_group_item, flags, 64); 1711 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1712 struct btrfs_block_group_item, flags, 64); 1713 1714 /* struct btrfs_free_space_info */ 1715 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1716 extent_count, 32); 1717 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1718 1719 /* struct btrfs_inode_ref */ 1720 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1721 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1722 1723 /* struct btrfs_inode_extref */ 1724 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1725 parent_objectid, 64); 1726 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1727 name_len, 16); 1728 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1729 1730 /* struct btrfs_inode_item */ 1731 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1732 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1733 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1734 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1735 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1736 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1737 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1738 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1739 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1740 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1741 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1742 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1743 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1744 generation, 64); 1745 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1746 sequence, 64); 1747 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1748 transid, 64); 1749 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1750 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1751 nbytes, 64); 1752 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1753 block_group, 64); 1754 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1755 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1756 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1757 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1758 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1759 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1760 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1761 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1762 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1763 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1764 1765 /* struct btrfs_dev_extent */ 1766 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1767 chunk_tree, 64); 1768 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1769 chunk_objectid, 64); 1770 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1771 chunk_offset, 64); 1772 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1773 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1774 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1775 generation, 64); 1776 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1777 1778 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1779 1780 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1781 struct btrfs_tree_block_info *item, 1782 struct btrfs_disk_key *key) 1783 { 1784 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1785 } 1786 1787 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1788 struct btrfs_tree_block_info *item, 1789 struct btrfs_disk_key *key) 1790 { 1791 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1792 } 1793 1794 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1795 root, 64); 1796 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1797 objectid, 64); 1798 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1799 offset, 64); 1800 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1801 count, 32); 1802 1803 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1804 count, 32); 1805 1806 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1807 type, 8); 1808 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1809 offset, 64); 1810 1811 static inline u32 btrfs_extent_inline_ref_size(int type) 1812 { 1813 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1814 type == BTRFS_SHARED_BLOCK_REF_KEY) 1815 return sizeof(struct btrfs_extent_inline_ref); 1816 if (type == BTRFS_SHARED_DATA_REF_KEY) 1817 return sizeof(struct btrfs_shared_data_ref) + 1818 sizeof(struct btrfs_extent_inline_ref); 1819 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1820 return sizeof(struct btrfs_extent_data_ref) + 1821 offsetof(struct btrfs_extent_inline_ref, offset); 1822 return 0; 1823 } 1824 1825 /* struct btrfs_node */ 1826 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1827 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1828 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1829 blockptr, 64); 1830 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1831 generation, 64); 1832 1833 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1834 { 1835 unsigned long ptr; 1836 ptr = offsetof(struct btrfs_node, ptrs) + 1837 sizeof(struct btrfs_key_ptr) * nr; 1838 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1839 } 1840 1841 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1842 int nr, u64 val) 1843 { 1844 unsigned long ptr; 1845 ptr = offsetof(struct btrfs_node, ptrs) + 1846 sizeof(struct btrfs_key_ptr) * nr; 1847 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1848 } 1849 1850 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1851 { 1852 unsigned long ptr; 1853 ptr = offsetof(struct btrfs_node, ptrs) + 1854 sizeof(struct btrfs_key_ptr) * nr; 1855 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1856 } 1857 1858 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1859 int nr, u64 val) 1860 { 1861 unsigned long ptr; 1862 ptr = offsetof(struct btrfs_node, ptrs) + 1863 sizeof(struct btrfs_key_ptr) * nr; 1864 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1865 } 1866 1867 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1868 { 1869 return offsetof(struct btrfs_node, ptrs) + 1870 sizeof(struct btrfs_key_ptr) * nr; 1871 } 1872 1873 void btrfs_node_key(const struct extent_buffer *eb, 1874 struct btrfs_disk_key *disk_key, int nr); 1875 1876 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1877 struct btrfs_disk_key *disk_key, int nr) 1878 { 1879 unsigned long ptr; 1880 ptr = btrfs_node_key_ptr_offset(nr); 1881 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1882 struct btrfs_key_ptr, key, disk_key); 1883 } 1884 1885 /* struct btrfs_item */ 1886 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1887 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1888 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1889 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1890 1891 static inline unsigned long btrfs_item_nr_offset(int nr) 1892 { 1893 return offsetof(struct btrfs_leaf, items) + 1894 sizeof(struct btrfs_item) * nr; 1895 } 1896 1897 static inline struct btrfs_item *btrfs_item_nr(int nr) 1898 { 1899 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1900 } 1901 1902 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1903 struct btrfs_item *item) 1904 { 1905 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1906 } 1907 1908 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1909 { 1910 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1911 } 1912 1913 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1914 { 1915 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1916 } 1917 1918 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1919 { 1920 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1921 } 1922 1923 static inline void btrfs_item_key(const struct extent_buffer *eb, 1924 struct btrfs_disk_key *disk_key, int nr) 1925 { 1926 struct btrfs_item *item = btrfs_item_nr(nr); 1927 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1928 } 1929 1930 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1931 struct btrfs_disk_key *disk_key, int nr) 1932 { 1933 struct btrfs_item *item = btrfs_item_nr(nr); 1934 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1935 } 1936 1937 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1938 1939 /* 1940 * struct btrfs_root_ref 1941 */ 1942 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1943 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1944 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1945 1946 /* struct btrfs_dir_item */ 1947 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1948 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1949 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1950 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1951 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1952 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1953 data_len, 16); 1954 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1955 name_len, 16); 1956 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1957 transid, 64); 1958 1959 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1960 const struct btrfs_dir_item *item, 1961 struct btrfs_disk_key *key) 1962 { 1963 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1964 } 1965 1966 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1967 struct btrfs_dir_item *item, 1968 const struct btrfs_disk_key *key) 1969 { 1970 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1971 } 1972 1973 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1974 num_entries, 64); 1975 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1976 num_bitmaps, 64); 1977 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1978 generation, 64); 1979 1980 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1981 const struct btrfs_free_space_header *h, 1982 struct btrfs_disk_key *key) 1983 { 1984 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1985 } 1986 1987 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1988 struct btrfs_free_space_header *h, 1989 const struct btrfs_disk_key *key) 1990 { 1991 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1992 } 1993 1994 /* struct btrfs_disk_key */ 1995 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1996 objectid, 64); 1997 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1998 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1999 2000 #ifdef __LITTLE_ENDIAN 2001 2002 /* 2003 * Optimized helpers for little-endian architectures where CPU and on-disk 2004 * structures have the same endianness and we can skip conversions. 2005 */ 2006 2007 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 2008 const struct btrfs_disk_key *disk_key) 2009 { 2010 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 2011 } 2012 2013 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 2014 const struct btrfs_key *cpu_key) 2015 { 2016 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 2017 } 2018 2019 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2020 struct btrfs_key *cpu_key, int nr) 2021 { 2022 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2023 2024 btrfs_node_key(eb, disk_key, nr); 2025 } 2026 2027 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2028 struct btrfs_key *cpu_key, int nr) 2029 { 2030 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2031 2032 btrfs_item_key(eb, disk_key, nr); 2033 } 2034 2035 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2036 const struct btrfs_dir_item *item, 2037 struct btrfs_key *cpu_key) 2038 { 2039 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 2040 2041 btrfs_dir_item_key(eb, item, disk_key); 2042 } 2043 2044 #else 2045 2046 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 2047 const struct btrfs_disk_key *disk) 2048 { 2049 cpu->offset = le64_to_cpu(disk->offset); 2050 cpu->type = disk->type; 2051 cpu->objectid = le64_to_cpu(disk->objectid); 2052 } 2053 2054 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2055 const struct btrfs_key *cpu) 2056 { 2057 disk->offset = cpu_to_le64(cpu->offset); 2058 disk->type = cpu->type; 2059 disk->objectid = cpu_to_le64(cpu->objectid); 2060 } 2061 2062 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2063 struct btrfs_key *key, int nr) 2064 { 2065 struct btrfs_disk_key disk_key; 2066 btrfs_node_key(eb, &disk_key, nr); 2067 btrfs_disk_key_to_cpu(key, &disk_key); 2068 } 2069 2070 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2071 struct btrfs_key *key, int nr) 2072 { 2073 struct btrfs_disk_key disk_key; 2074 btrfs_item_key(eb, &disk_key, nr); 2075 btrfs_disk_key_to_cpu(key, &disk_key); 2076 } 2077 2078 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2079 const struct btrfs_dir_item *item, 2080 struct btrfs_key *key) 2081 { 2082 struct btrfs_disk_key disk_key; 2083 btrfs_dir_item_key(eb, item, &disk_key); 2084 btrfs_disk_key_to_cpu(key, &disk_key); 2085 } 2086 2087 #endif 2088 2089 /* struct btrfs_header */ 2090 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2091 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2092 generation, 64); 2093 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2094 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2095 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2096 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2097 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2098 generation, 64); 2099 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2100 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2101 nritems, 32); 2102 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2103 2104 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2105 { 2106 return (btrfs_header_flags(eb) & flag) == flag; 2107 } 2108 2109 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2110 { 2111 u64 flags = btrfs_header_flags(eb); 2112 btrfs_set_header_flags(eb, flags | flag); 2113 } 2114 2115 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2116 { 2117 u64 flags = btrfs_header_flags(eb); 2118 btrfs_set_header_flags(eb, flags & ~flag); 2119 } 2120 2121 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2122 { 2123 u64 flags = btrfs_header_flags(eb); 2124 return flags >> BTRFS_BACKREF_REV_SHIFT; 2125 } 2126 2127 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2128 int rev) 2129 { 2130 u64 flags = btrfs_header_flags(eb); 2131 flags &= ~BTRFS_BACKREF_REV_MASK; 2132 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2133 btrfs_set_header_flags(eb, flags); 2134 } 2135 2136 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2137 { 2138 return btrfs_header_level(eb) == 0; 2139 } 2140 2141 /* struct btrfs_root_item */ 2142 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2143 generation, 64); 2144 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2145 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2146 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2147 2148 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2149 generation, 64); 2150 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2151 BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8); 2152 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2153 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2154 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2155 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2156 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2157 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2158 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2159 last_snapshot, 64); 2160 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2161 generation_v2, 64); 2162 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2163 ctransid, 64); 2164 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2165 otransid, 64); 2166 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2167 stransid, 64); 2168 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2169 rtransid, 64); 2170 2171 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2172 { 2173 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2174 } 2175 2176 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2177 { 2178 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2179 } 2180 2181 /* struct btrfs_root_backup */ 2182 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2183 tree_root, 64); 2184 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2185 tree_root_gen, 64); 2186 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2187 tree_root_level, 8); 2188 2189 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2190 chunk_root, 64); 2191 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2192 chunk_root_gen, 64); 2193 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2194 chunk_root_level, 8); 2195 2196 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2197 extent_root, 64); 2198 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2199 extent_root_gen, 64); 2200 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2201 extent_root_level, 8); 2202 2203 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2204 fs_root, 64); 2205 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2206 fs_root_gen, 64); 2207 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2208 fs_root_level, 8); 2209 2210 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2211 dev_root, 64); 2212 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2213 dev_root_gen, 64); 2214 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2215 dev_root_level, 8); 2216 2217 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2218 csum_root, 64); 2219 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2220 csum_root_gen, 64); 2221 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2222 csum_root_level, 8); 2223 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2224 total_bytes, 64); 2225 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2226 bytes_used, 64); 2227 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2228 num_devices, 64); 2229 2230 /* struct btrfs_balance_item */ 2231 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2232 2233 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2234 const struct btrfs_balance_item *bi, 2235 struct btrfs_disk_balance_args *ba) 2236 { 2237 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2238 } 2239 2240 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2241 struct btrfs_balance_item *bi, 2242 const struct btrfs_disk_balance_args *ba) 2243 { 2244 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2245 } 2246 2247 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2248 const struct btrfs_balance_item *bi, 2249 struct btrfs_disk_balance_args *ba) 2250 { 2251 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2252 } 2253 2254 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2255 struct btrfs_balance_item *bi, 2256 const struct btrfs_disk_balance_args *ba) 2257 { 2258 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2259 } 2260 2261 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2262 const struct btrfs_balance_item *bi, 2263 struct btrfs_disk_balance_args *ba) 2264 { 2265 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2266 } 2267 2268 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2269 struct btrfs_balance_item *bi, 2270 const struct btrfs_disk_balance_args *ba) 2271 { 2272 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2273 } 2274 2275 static inline void 2276 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2277 const struct btrfs_disk_balance_args *disk) 2278 { 2279 memset(cpu, 0, sizeof(*cpu)); 2280 2281 cpu->profiles = le64_to_cpu(disk->profiles); 2282 cpu->usage = le64_to_cpu(disk->usage); 2283 cpu->devid = le64_to_cpu(disk->devid); 2284 cpu->pstart = le64_to_cpu(disk->pstart); 2285 cpu->pend = le64_to_cpu(disk->pend); 2286 cpu->vstart = le64_to_cpu(disk->vstart); 2287 cpu->vend = le64_to_cpu(disk->vend); 2288 cpu->target = le64_to_cpu(disk->target); 2289 cpu->flags = le64_to_cpu(disk->flags); 2290 cpu->limit = le64_to_cpu(disk->limit); 2291 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2292 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2293 } 2294 2295 static inline void 2296 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2297 const struct btrfs_balance_args *cpu) 2298 { 2299 memset(disk, 0, sizeof(*disk)); 2300 2301 disk->profiles = cpu_to_le64(cpu->profiles); 2302 disk->usage = cpu_to_le64(cpu->usage); 2303 disk->devid = cpu_to_le64(cpu->devid); 2304 disk->pstart = cpu_to_le64(cpu->pstart); 2305 disk->pend = cpu_to_le64(cpu->pend); 2306 disk->vstart = cpu_to_le64(cpu->vstart); 2307 disk->vend = cpu_to_le64(cpu->vend); 2308 disk->target = cpu_to_le64(cpu->target); 2309 disk->flags = cpu_to_le64(cpu->flags); 2310 disk->limit = cpu_to_le64(cpu->limit); 2311 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2312 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2313 } 2314 2315 /* struct btrfs_super_block */ 2316 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2317 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2318 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2319 generation, 64); 2320 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2321 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2322 struct btrfs_super_block, sys_chunk_array_size, 32); 2323 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2324 struct btrfs_super_block, chunk_root_generation, 64); 2325 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2326 root_level, 8); 2327 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2328 chunk_root, 64); 2329 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2330 chunk_root_level, 8); 2331 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2332 log_root, 64); 2333 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2334 log_root_transid, 64); 2335 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2336 log_root_level, 8); 2337 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2338 total_bytes, 64); 2339 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2340 bytes_used, 64); 2341 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2342 sectorsize, 32); 2343 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2344 nodesize, 32); 2345 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2346 stripesize, 32); 2347 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2348 root_dir_objectid, 64); 2349 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2350 num_devices, 64); 2351 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2352 compat_flags, 64); 2353 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2354 compat_ro_flags, 64); 2355 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2356 incompat_flags, 64); 2357 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2358 csum_type, 16); 2359 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2360 cache_generation, 64); 2361 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2362 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2363 uuid_tree_generation, 64); 2364 2365 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2366 const char *btrfs_super_csum_name(u16 csum_type); 2367 const char *btrfs_super_csum_driver(u16 csum_type); 2368 size_t __attribute_const__ btrfs_get_num_csums(void); 2369 2370 2371 /* 2372 * The leaf data grows from end-to-front in the node. 2373 * this returns the address of the start of the last item, 2374 * which is the stop of the leaf data stack 2375 */ 2376 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2377 { 2378 u32 nr = btrfs_header_nritems(leaf); 2379 2380 if (nr == 0) 2381 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2382 return btrfs_item_offset_nr(leaf, nr - 1); 2383 } 2384 2385 /* struct btrfs_file_extent_item */ 2386 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2387 type, 8); 2388 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2389 struct btrfs_file_extent_item, disk_bytenr, 64); 2390 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2391 struct btrfs_file_extent_item, offset, 64); 2392 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2393 struct btrfs_file_extent_item, generation, 64); 2394 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2395 struct btrfs_file_extent_item, num_bytes, 64); 2396 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2397 struct btrfs_file_extent_item, ram_bytes, 64); 2398 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2399 struct btrfs_file_extent_item, disk_num_bytes, 64); 2400 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2401 struct btrfs_file_extent_item, compression, 8); 2402 2403 static inline unsigned long 2404 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2405 { 2406 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2407 } 2408 2409 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2410 { 2411 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2412 } 2413 2414 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2415 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2416 disk_bytenr, 64); 2417 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2418 generation, 64); 2419 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2420 disk_num_bytes, 64); 2421 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2422 offset, 64); 2423 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2424 num_bytes, 64); 2425 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2426 ram_bytes, 64); 2427 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2428 compression, 8); 2429 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2430 encryption, 8); 2431 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2432 other_encoding, 16); 2433 2434 /* 2435 * this returns the number of bytes used by the item on disk, minus the 2436 * size of any extent headers. If a file is compressed on disk, this is 2437 * the compressed size 2438 */ 2439 static inline u32 btrfs_file_extent_inline_item_len( 2440 const struct extent_buffer *eb, 2441 struct btrfs_item *e) 2442 { 2443 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2444 } 2445 2446 /* btrfs_qgroup_status_item */ 2447 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2448 generation, 64); 2449 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2450 version, 64); 2451 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2452 flags, 64); 2453 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2454 rescan, 64); 2455 2456 /* btrfs_qgroup_info_item */ 2457 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2458 generation, 64); 2459 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2460 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2461 rfer_cmpr, 64); 2462 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2463 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2464 excl_cmpr, 64); 2465 2466 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2467 struct btrfs_qgroup_info_item, generation, 64); 2468 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2469 rfer, 64); 2470 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2471 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2472 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2473 excl, 64); 2474 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2475 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2476 2477 /* btrfs_qgroup_limit_item */ 2478 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2479 flags, 64); 2480 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2481 max_rfer, 64); 2482 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2483 max_excl, 64); 2484 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2485 rsv_rfer, 64); 2486 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2487 rsv_excl, 64); 2488 2489 /* btrfs_dev_replace_item */ 2490 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2491 struct btrfs_dev_replace_item, src_devid, 64); 2492 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2493 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2494 64); 2495 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2496 replace_state, 64); 2497 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2498 time_started, 64); 2499 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2500 time_stopped, 64); 2501 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2502 num_write_errors, 64); 2503 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2504 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2505 64); 2506 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2507 cursor_left, 64); 2508 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2509 cursor_right, 64); 2510 2511 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2512 struct btrfs_dev_replace_item, src_devid, 64); 2513 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2514 struct btrfs_dev_replace_item, 2515 cont_reading_from_srcdev_mode, 64); 2516 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2517 struct btrfs_dev_replace_item, replace_state, 64); 2518 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2519 struct btrfs_dev_replace_item, time_started, 64); 2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2521 struct btrfs_dev_replace_item, time_stopped, 64); 2522 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2523 struct btrfs_dev_replace_item, num_write_errors, 64); 2524 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2525 struct btrfs_dev_replace_item, 2526 num_uncorrectable_read_errors, 64); 2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2528 struct btrfs_dev_replace_item, cursor_left, 64); 2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2530 struct btrfs_dev_replace_item, cursor_right, 64); 2531 2532 /* helper function to cast into the data area of the leaf. */ 2533 #define btrfs_item_ptr(leaf, slot, type) \ 2534 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2535 btrfs_item_offset_nr(leaf, slot))) 2536 2537 #define btrfs_item_ptr_offset(leaf, slot) \ 2538 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2539 btrfs_item_offset_nr(leaf, slot))) 2540 2541 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2542 { 2543 return crc32c(crc, address, length); 2544 } 2545 2546 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2547 { 2548 put_unaligned_le32(~crc, result); 2549 } 2550 2551 static inline u64 btrfs_name_hash(const char *name, int len) 2552 { 2553 return crc32c((u32)~1, name, len); 2554 } 2555 2556 /* 2557 * Figure the key offset of an extended inode ref 2558 */ 2559 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2560 int len) 2561 { 2562 return (u64) crc32c(parent_objectid, name, len); 2563 } 2564 2565 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2566 { 2567 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2568 } 2569 2570 /* extent-tree.c */ 2571 2572 enum btrfs_inline_ref_type { 2573 BTRFS_REF_TYPE_INVALID, 2574 BTRFS_REF_TYPE_BLOCK, 2575 BTRFS_REF_TYPE_DATA, 2576 BTRFS_REF_TYPE_ANY, 2577 }; 2578 2579 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2580 struct btrfs_extent_inline_ref *iref, 2581 enum btrfs_inline_ref_type is_data); 2582 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2583 2584 /* 2585 * Take the number of bytes to be checksummmed and figure out how many leaves 2586 * it would require to store the csums for that many bytes. 2587 */ 2588 static inline u64 btrfs_csum_bytes_to_leaves( 2589 const struct btrfs_fs_info *fs_info, u64 csum_bytes) 2590 { 2591 const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits; 2592 2593 return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf); 2594 } 2595 2596 /* 2597 * Use this if we would be adding new items, as we could split nodes as we cow 2598 * down the tree. 2599 */ 2600 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2601 unsigned num_items) 2602 { 2603 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2604 } 2605 2606 /* 2607 * Doing a truncate or a modification won't result in new nodes or leaves, just 2608 * what we need for COW. 2609 */ 2610 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2611 unsigned num_items) 2612 { 2613 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2614 } 2615 2616 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2617 u64 start, u64 num_bytes); 2618 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2619 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2620 unsigned long count); 2621 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2622 struct btrfs_delayed_ref_root *delayed_refs, 2623 struct btrfs_delayed_ref_head *head); 2624 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2625 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2626 struct btrfs_fs_info *fs_info, u64 bytenr, 2627 u64 offset, int metadata, u64 *refs, u64 *flags); 2628 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2629 int reserved); 2630 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2631 u64 bytenr, u64 num_bytes); 2632 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2633 int btrfs_cross_ref_exist(struct btrfs_root *root, 2634 u64 objectid, u64 offset, u64 bytenr, bool strict); 2635 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2636 struct btrfs_root *root, 2637 u64 parent, u64 root_objectid, 2638 const struct btrfs_disk_key *key, 2639 int level, u64 hint, 2640 u64 empty_size, 2641 enum btrfs_lock_nesting nest); 2642 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2643 struct btrfs_root *root, 2644 struct extent_buffer *buf, 2645 u64 parent, int last_ref); 2646 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2647 struct btrfs_root *root, u64 owner, 2648 u64 offset, u64 ram_bytes, 2649 struct btrfs_key *ins); 2650 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2651 u64 root_objectid, u64 owner, u64 offset, 2652 struct btrfs_key *ins); 2653 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2654 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2655 struct btrfs_key *ins, int is_data, int delalloc); 2656 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2657 struct extent_buffer *buf, int full_backref); 2658 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2659 struct extent_buffer *buf, int full_backref); 2660 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2661 struct extent_buffer *eb, u64 flags, 2662 int level, int is_data); 2663 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2664 2665 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2666 u64 start, u64 len, int delalloc); 2667 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2668 u64 len); 2669 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2670 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2671 struct btrfs_ref *generic_ref); 2672 2673 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2674 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2675 2676 /* 2677 * Different levels for to flush space when doing space reservations. 2678 * 2679 * The higher the level, the more methods we try to reclaim space. 2680 */ 2681 enum btrfs_reserve_flush_enum { 2682 /* If we are in the transaction, we can't flush anything.*/ 2683 BTRFS_RESERVE_NO_FLUSH, 2684 2685 /* 2686 * Flush space by: 2687 * - Running delayed inode items 2688 * - Allocating a new chunk 2689 */ 2690 BTRFS_RESERVE_FLUSH_LIMIT, 2691 2692 /* 2693 * Flush space by: 2694 * - Running delayed inode items 2695 * - Running delayed refs 2696 * - Running delalloc and waiting for ordered extents 2697 * - Allocating a new chunk 2698 */ 2699 BTRFS_RESERVE_FLUSH_EVICT, 2700 2701 /* 2702 * Flush space by above mentioned methods and by: 2703 * - Running delayed iputs 2704 * - Commiting transaction 2705 * 2706 * Can be interruped by fatal signal. 2707 */ 2708 BTRFS_RESERVE_FLUSH_DATA, 2709 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2710 BTRFS_RESERVE_FLUSH_ALL, 2711 2712 /* 2713 * Pretty much the same as FLUSH_ALL, but can also steal space from 2714 * global rsv. 2715 * 2716 * Can be interruped by fatal signal. 2717 */ 2718 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2719 }; 2720 2721 enum btrfs_flush_state { 2722 FLUSH_DELAYED_ITEMS_NR = 1, 2723 FLUSH_DELAYED_ITEMS = 2, 2724 FLUSH_DELAYED_REFS_NR = 3, 2725 FLUSH_DELAYED_REFS = 4, 2726 FLUSH_DELALLOC = 5, 2727 FLUSH_DELALLOC_WAIT = 6, 2728 ALLOC_CHUNK = 7, 2729 ALLOC_CHUNK_FORCE = 8, 2730 RUN_DELAYED_IPUTS = 9, 2731 COMMIT_TRANS = 10, 2732 }; 2733 2734 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2735 struct btrfs_block_rsv *rsv, 2736 int nitems, bool use_global_rsv); 2737 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2738 struct btrfs_block_rsv *rsv); 2739 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2740 2741 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2742 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2743 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2744 u64 start, u64 end); 2745 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2746 u64 num_bytes, u64 *actual_bytes); 2747 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2748 2749 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2750 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2751 struct btrfs_fs_info *fs_info); 2752 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2753 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2754 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2755 2756 /* ctree.c */ 2757 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2758 int *slot); 2759 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2760 int btrfs_previous_item(struct btrfs_root *root, 2761 struct btrfs_path *path, u64 min_objectid, 2762 int type); 2763 int btrfs_previous_extent_item(struct btrfs_root *root, 2764 struct btrfs_path *path, u64 min_objectid); 2765 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2766 struct btrfs_path *path, 2767 const struct btrfs_key *new_key); 2768 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2769 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2770 struct btrfs_key *key, int lowest_level, 2771 u64 min_trans); 2772 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2773 struct btrfs_path *path, 2774 u64 min_trans); 2775 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2776 int slot); 2777 2778 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2779 struct btrfs_root *root, struct extent_buffer *buf, 2780 struct extent_buffer *parent, int parent_slot, 2781 struct extent_buffer **cow_ret, 2782 enum btrfs_lock_nesting nest); 2783 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2784 struct btrfs_root *root, 2785 struct extent_buffer *buf, 2786 struct extent_buffer **cow_ret, u64 new_root_objectid); 2787 int btrfs_block_can_be_shared(struct btrfs_root *root, 2788 struct extent_buffer *buf); 2789 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2790 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2791 int btrfs_split_item(struct btrfs_trans_handle *trans, 2792 struct btrfs_root *root, 2793 struct btrfs_path *path, 2794 const struct btrfs_key *new_key, 2795 unsigned long split_offset); 2796 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2797 struct btrfs_root *root, 2798 struct btrfs_path *path, 2799 const struct btrfs_key *new_key); 2800 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2801 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2802 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2803 const struct btrfs_key *key, struct btrfs_path *p, 2804 int ins_len, int cow); 2805 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2806 struct btrfs_path *p, u64 time_seq); 2807 int btrfs_search_slot_for_read(struct btrfs_root *root, 2808 const struct btrfs_key *key, 2809 struct btrfs_path *p, int find_higher, 2810 int return_any); 2811 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2812 struct btrfs_root *root, struct extent_buffer *parent, 2813 int start_slot, u64 *last_ret, 2814 struct btrfs_key *progress); 2815 void btrfs_release_path(struct btrfs_path *p); 2816 struct btrfs_path *btrfs_alloc_path(void); 2817 void btrfs_free_path(struct btrfs_path *p); 2818 2819 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2820 struct btrfs_path *path, int slot, int nr); 2821 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2822 struct btrfs_root *root, 2823 struct btrfs_path *path) 2824 { 2825 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2826 } 2827 2828 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2829 const struct btrfs_key *cpu_key, u32 *data_size, 2830 int nr); 2831 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2832 const struct btrfs_key *key, void *data, u32 data_size); 2833 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2834 struct btrfs_root *root, 2835 struct btrfs_path *path, 2836 const struct btrfs_key *cpu_key, u32 *data_size, 2837 int nr); 2838 2839 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2840 struct btrfs_root *root, 2841 struct btrfs_path *path, 2842 const struct btrfs_key *key, 2843 u32 data_size) 2844 { 2845 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2846 } 2847 2848 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2849 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2850 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2851 u64 time_seq); 2852 static inline int btrfs_next_old_item(struct btrfs_root *root, 2853 struct btrfs_path *p, u64 time_seq) 2854 { 2855 ++p->slots[0]; 2856 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2857 return btrfs_next_old_leaf(root, p, time_seq); 2858 return 0; 2859 } 2860 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2861 { 2862 return btrfs_next_old_item(root, p, 0); 2863 } 2864 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2865 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2866 int for_reloc); 2867 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2868 struct btrfs_root *root, 2869 struct extent_buffer *node, 2870 struct extent_buffer *parent); 2871 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2872 { 2873 /* 2874 * Do it this way so we only ever do one test_bit in the normal case. 2875 */ 2876 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2877 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2878 return 2; 2879 return 1; 2880 } 2881 return 0; 2882 } 2883 2884 /* 2885 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2886 * anything except sleeping. This function is used to check the status of 2887 * the fs. 2888 */ 2889 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2890 { 2891 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2892 } 2893 2894 /* tree mod log functions from ctree.c */ 2895 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2896 struct seq_list *elem); 2897 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2898 struct seq_list *elem); 2899 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2900 2901 /* root-item.c */ 2902 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2903 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2904 int name_len); 2905 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2906 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2907 int name_len); 2908 int btrfs_del_root(struct btrfs_trans_handle *trans, 2909 const struct btrfs_key *key); 2910 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2911 const struct btrfs_key *key, 2912 struct btrfs_root_item *item); 2913 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2914 struct btrfs_root *root, 2915 struct btrfs_key *key, 2916 struct btrfs_root_item *item); 2917 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2918 struct btrfs_path *path, struct btrfs_root_item *root_item, 2919 struct btrfs_key *root_key); 2920 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2921 void btrfs_set_root_node(struct btrfs_root_item *item, 2922 struct extent_buffer *node); 2923 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2924 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2925 struct btrfs_root *root); 2926 2927 /* uuid-tree.c */ 2928 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2929 u64 subid); 2930 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2931 u64 subid); 2932 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2933 2934 /* dir-item.c */ 2935 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2936 const char *name, int name_len); 2937 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2938 int name_len, struct btrfs_inode *dir, 2939 struct btrfs_key *location, u8 type, u64 index); 2940 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2941 struct btrfs_root *root, 2942 struct btrfs_path *path, u64 dir, 2943 const char *name, int name_len, 2944 int mod); 2945 struct btrfs_dir_item * 2946 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2947 struct btrfs_root *root, 2948 struct btrfs_path *path, u64 dir, 2949 u64 objectid, const char *name, int name_len, 2950 int mod); 2951 struct btrfs_dir_item * 2952 btrfs_search_dir_index_item(struct btrfs_root *root, 2953 struct btrfs_path *path, u64 dirid, 2954 const char *name, int name_len); 2955 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2956 struct btrfs_root *root, 2957 struct btrfs_path *path, 2958 struct btrfs_dir_item *di); 2959 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2960 struct btrfs_root *root, 2961 struct btrfs_path *path, u64 objectid, 2962 const char *name, u16 name_len, 2963 const void *data, u16 data_len); 2964 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2965 struct btrfs_root *root, 2966 struct btrfs_path *path, u64 dir, 2967 const char *name, u16 name_len, 2968 int mod); 2969 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2970 struct btrfs_path *path, 2971 const char *name, 2972 int name_len); 2973 2974 /* orphan.c */ 2975 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2976 struct btrfs_root *root, u64 offset); 2977 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2978 struct btrfs_root *root, u64 offset); 2979 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2980 2981 /* inode-item.c */ 2982 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2983 struct btrfs_root *root, 2984 const char *name, int name_len, 2985 u64 inode_objectid, u64 ref_objectid, u64 index); 2986 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2987 struct btrfs_root *root, 2988 const char *name, int name_len, 2989 u64 inode_objectid, u64 ref_objectid, u64 *index); 2990 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2991 struct btrfs_root *root, 2992 struct btrfs_path *path, u64 objectid); 2993 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2994 *root, struct btrfs_path *path, 2995 struct btrfs_key *location, int mod); 2996 2997 struct btrfs_inode_extref * 2998 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2999 struct btrfs_root *root, 3000 struct btrfs_path *path, 3001 const char *name, int name_len, 3002 u64 inode_objectid, u64 ref_objectid, int ins_len, 3003 int cow); 3004 3005 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 3006 int slot, const char *name, 3007 int name_len); 3008 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 3009 struct extent_buffer *leaf, int slot, u64 ref_objectid, 3010 const char *name, int name_len); 3011 /* file-item.c */ 3012 struct btrfs_dio_private; 3013 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3014 struct btrfs_root *root, u64 bytenr, u64 len); 3015 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst); 3016 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3017 struct btrfs_root *root, 3018 u64 objectid, u64 pos, 3019 u64 disk_offset, u64 disk_num_bytes, 3020 u64 num_bytes, u64 offset, u64 ram_bytes, 3021 u8 compression, u8 encryption, u16 other_encoding); 3022 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3023 struct btrfs_root *root, 3024 struct btrfs_path *path, u64 objectid, 3025 u64 bytenr, int mod); 3026 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3027 struct btrfs_root *root, 3028 struct btrfs_ordered_sum *sums); 3029 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 3030 u64 file_start, int contig); 3031 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3032 struct list_head *list, int search_commit); 3033 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3034 const struct btrfs_path *path, 3035 struct btrfs_file_extent_item *fi, 3036 const bool new_inline, 3037 struct extent_map *em); 3038 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 3039 u64 len); 3040 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 3041 u64 len); 3042 void btrfs_inode_safe_disk_i_size_write(struct btrfs_inode *inode, u64 new_i_size); 3043 u64 btrfs_file_extent_end(const struct btrfs_path *path); 3044 3045 /* inode.c */ 3046 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 3047 int mirror_num, unsigned long bio_flags); 3048 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u32 bio_offset, 3049 struct page *page, u64 start, u64 end, int mirror); 3050 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3051 u64 start, u64 len); 3052 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3053 u64 *orig_start, u64 *orig_block_len, 3054 u64 *ram_bytes, bool strict); 3055 3056 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 3057 struct btrfs_inode *inode); 3058 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3059 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3060 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3061 struct btrfs_root *root, 3062 struct btrfs_inode *dir, struct btrfs_inode *inode, 3063 const char *name, int name_len); 3064 int btrfs_add_link(struct btrfs_trans_handle *trans, 3065 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3066 const char *name, int name_len, int add_backref, u64 index); 3067 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3068 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, 3069 int front); 3070 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3071 struct btrfs_root *root, 3072 struct btrfs_inode *inode, u64 new_size, 3073 u32 min_type); 3074 3075 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3076 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr); 3077 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3078 unsigned int extra_bits, 3079 struct extent_state **cached_state); 3080 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3081 struct btrfs_root *new_root, 3082 struct btrfs_root *parent_root, 3083 u64 new_dirid); 3084 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3085 unsigned *bits); 3086 void btrfs_clear_delalloc_extent(struct inode *inode, 3087 struct extent_state *state, unsigned *bits); 3088 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3089 struct extent_state *other); 3090 void btrfs_split_delalloc_extent(struct inode *inode, 3091 struct extent_state *orig, u64 split); 3092 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3093 unsigned long bio_flags); 3094 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3095 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3096 int btrfs_readpage(struct file *file, struct page *page); 3097 void btrfs_evict_inode(struct inode *inode); 3098 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3099 struct inode *btrfs_alloc_inode(struct super_block *sb); 3100 void btrfs_destroy_inode(struct inode *inode); 3101 void btrfs_free_inode(struct inode *inode); 3102 int btrfs_drop_inode(struct inode *inode); 3103 int __init btrfs_init_cachep(void); 3104 void __cold btrfs_destroy_cachep(void); 3105 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3106 struct btrfs_root *root, struct btrfs_path *path); 3107 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3108 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3109 struct page *page, size_t pg_offset, 3110 u64 start, u64 end); 3111 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3112 struct btrfs_root *root, struct btrfs_inode *inode); 3113 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3114 struct btrfs_root *root, struct btrfs_inode *inode); 3115 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3116 struct btrfs_inode *inode); 3117 int btrfs_orphan_cleanup(struct btrfs_root *root); 3118 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); 3119 void btrfs_add_delayed_iput(struct inode *inode); 3120 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3121 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3122 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3123 u64 start, u64 num_bytes, u64 min_size, 3124 loff_t actual_len, u64 *alloc_hint); 3125 int btrfs_prealloc_file_range_trans(struct inode *inode, 3126 struct btrfs_trans_handle *trans, int mode, 3127 u64 start, u64 num_bytes, u64 min_size, 3128 loff_t actual_len, u64 *alloc_hint); 3129 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3130 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3131 struct writeback_control *wbc); 3132 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3133 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3134 u64 end, int uptodate); 3135 extern const struct dentry_operations btrfs_dentry_operations; 3136 extern const struct iomap_ops btrfs_dio_iomap_ops; 3137 extern const struct iomap_dio_ops btrfs_dio_ops; 3138 3139 /* Inode locking type flags, by default the exclusive lock is taken */ 3140 #define BTRFS_ILOCK_SHARED (1U << 0) 3141 #define BTRFS_ILOCK_TRY (1U << 1) 3142 3143 int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); 3144 void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); 3145 void btrfs_update_inode_bytes(struct btrfs_inode *inode, 3146 const u64 add_bytes, 3147 const u64 del_bytes); 3148 3149 /* ioctl.c */ 3150 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3151 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3152 int btrfs_ioctl_get_supported_features(void __user *arg); 3153 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3154 int __pure btrfs_is_empty_uuid(u8 *uuid); 3155 int btrfs_defrag_file(struct inode *inode, struct file *file, 3156 struct btrfs_ioctl_defrag_range_args *range, 3157 u64 newer_than, unsigned long max_pages); 3158 void btrfs_get_block_group_info(struct list_head *groups_list, 3159 struct btrfs_ioctl_space_info *space); 3160 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3161 struct btrfs_ioctl_balance_args *bargs); 3162 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3163 enum btrfs_exclusive_operation type); 3164 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3165 3166 /* file.c */ 3167 int __init btrfs_auto_defrag_init(void); 3168 void __cold btrfs_auto_defrag_exit(void); 3169 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3170 struct btrfs_inode *inode); 3171 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3172 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3173 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3174 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3175 int skip_pinned); 3176 extern const struct file_operations btrfs_file_operations; 3177 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3178 struct btrfs_root *root, struct btrfs_inode *inode, 3179 struct btrfs_drop_extents_args *args); 3180 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path, 3181 const u64 start, const u64 end, 3182 struct btrfs_replace_extent_info *extent_info, 3183 struct btrfs_trans_handle **trans_out); 3184 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3185 struct btrfs_inode *inode, u64 start, u64 end); 3186 int btrfs_release_file(struct inode *inode, struct file *file); 3187 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3188 size_t num_pages, loff_t pos, size_t write_bytes, 3189 struct extent_state **cached, bool noreserve); 3190 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3191 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3192 size_t *write_bytes); 3193 void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3194 3195 /* tree-defrag.c */ 3196 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3197 struct btrfs_root *root); 3198 3199 /* super.c */ 3200 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3201 unsigned long new_flags); 3202 int btrfs_sync_fs(struct super_block *sb, int wait); 3203 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3204 u64 subvol_objectid); 3205 3206 static inline __printf(2, 3) __cold 3207 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3208 { 3209 } 3210 3211 #ifdef CONFIG_PRINTK 3212 __printf(2, 3) 3213 __cold 3214 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3215 #else 3216 #define btrfs_printk(fs_info, fmt, args...) \ 3217 btrfs_no_printk(fs_info, fmt, ##args) 3218 #endif 3219 3220 #define btrfs_emerg(fs_info, fmt, args...) \ 3221 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3222 #define btrfs_alert(fs_info, fmt, args...) \ 3223 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3224 #define btrfs_crit(fs_info, fmt, args...) \ 3225 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3226 #define btrfs_err(fs_info, fmt, args...) \ 3227 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3228 #define btrfs_warn(fs_info, fmt, args...) \ 3229 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3230 #define btrfs_notice(fs_info, fmt, args...) \ 3231 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3232 #define btrfs_info(fs_info, fmt, args...) \ 3233 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3234 3235 /* 3236 * Wrappers that use printk_in_rcu 3237 */ 3238 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3239 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3240 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3241 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3242 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3243 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3244 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3245 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3246 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3247 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3248 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3249 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3250 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3251 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3252 3253 /* 3254 * Wrappers that use a ratelimited printk_in_rcu 3255 */ 3256 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3257 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3258 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3259 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3260 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3261 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3262 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3263 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3264 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3265 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3266 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3267 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3268 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3269 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3270 3271 /* 3272 * Wrappers that use a ratelimited printk 3273 */ 3274 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3275 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3276 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3277 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3278 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3279 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3280 #define btrfs_err_rl(fs_info, fmt, args...) \ 3281 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3282 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3283 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3284 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3285 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3286 #define btrfs_info_rl(fs_info, fmt, args...) \ 3287 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3288 3289 #if defined(CONFIG_DYNAMIC_DEBUG) 3290 #define btrfs_debug(fs_info, fmt, args...) \ 3291 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3292 fs_info, KERN_DEBUG fmt, ##args) 3293 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3294 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3295 fs_info, KERN_DEBUG fmt, ##args) 3296 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3297 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3298 fs_info, KERN_DEBUG fmt, ##args) 3299 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3300 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3301 fs_info, KERN_DEBUG fmt, ##args) 3302 #elif defined(DEBUG) 3303 #define btrfs_debug(fs_info, fmt, args...) \ 3304 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3305 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3306 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3307 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3308 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3309 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3310 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3311 #else 3312 #define btrfs_debug(fs_info, fmt, args...) \ 3313 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3314 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3315 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3316 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3317 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3318 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3319 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3320 #endif 3321 3322 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3323 do { \ 3324 rcu_read_lock(); \ 3325 btrfs_printk(fs_info, fmt, ##args); \ 3326 rcu_read_unlock(); \ 3327 } while (0) 3328 3329 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3330 do { \ 3331 rcu_read_lock(); \ 3332 btrfs_no_printk(fs_info, fmt, ##args); \ 3333 rcu_read_unlock(); \ 3334 } while (0) 3335 3336 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3337 do { \ 3338 static DEFINE_RATELIMIT_STATE(_rs, \ 3339 DEFAULT_RATELIMIT_INTERVAL, \ 3340 DEFAULT_RATELIMIT_BURST); \ 3341 if (__ratelimit(&_rs)) \ 3342 btrfs_printk(fs_info, fmt, ##args); \ 3343 } while (0) 3344 3345 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3346 do { \ 3347 rcu_read_lock(); \ 3348 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3349 rcu_read_unlock(); \ 3350 } while (0) 3351 3352 #ifdef CONFIG_BTRFS_ASSERT 3353 __cold __noreturn 3354 static inline void assertfail(const char *expr, const char *file, int line) 3355 { 3356 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3357 BUG(); 3358 } 3359 3360 #define ASSERT(expr) \ 3361 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3362 3363 #else 3364 static inline void assertfail(const char *expr, const char* file, int line) { } 3365 #define ASSERT(expr) (void)(expr) 3366 #endif 3367 3368 /* 3369 * Get the correct offset inside the page of extent buffer. 3370 * 3371 * @eb: target extent buffer 3372 * @start: offset inside the extent buffer 3373 * 3374 * Will handle both sectorsize == PAGE_SIZE and sectorsize < PAGE_SIZE cases. 3375 */ 3376 static inline size_t get_eb_offset_in_page(const struct extent_buffer *eb, 3377 unsigned long offset) 3378 { 3379 /* 3380 * For sectorsize == PAGE_SIZE case, eb->start will always be aligned 3381 * to PAGE_SIZE, thus adding it won't cause any difference. 3382 * 3383 * For sectorsize < PAGE_SIZE, we must only read the data that belongs 3384 * to the eb, thus we have to take the eb->start into consideration. 3385 */ 3386 return offset_in_page(offset + eb->start); 3387 } 3388 3389 static inline unsigned long get_eb_page_index(unsigned long offset) 3390 { 3391 /* 3392 * For sectorsize == PAGE_SIZE case, plain >> PAGE_SHIFT is enough. 3393 * 3394 * For sectorsize < PAGE_SIZE case, we only support 64K PAGE_SIZE, 3395 * and have ensured that all tree blocks are contained in one page, 3396 * thus we always get index == 0. 3397 */ 3398 return offset >> PAGE_SHIFT; 3399 } 3400 3401 /* 3402 * Use that for functions that are conditionally exported for sanity tests but 3403 * otherwise static 3404 */ 3405 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3406 #define EXPORT_FOR_TESTS static 3407 #else 3408 #define EXPORT_FOR_TESTS 3409 #endif 3410 3411 __cold 3412 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3413 { 3414 btrfs_err(fs_info, 3415 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3416 } 3417 3418 __printf(5, 6) 3419 __cold 3420 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3421 unsigned int line, int errno, const char *fmt, ...); 3422 3423 const char * __attribute_const__ btrfs_decode_error(int errno); 3424 3425 __cold 3426 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3427 const char *function, 3428 unsigned int line, int errno); 3429 3430 /* 3431 * Call btrfs_abort_transaction as early as possible when an error condition is 3432 * detected, that way the exact line number is reported. 3433 */ 3434 #define btrfs_abort_transaction(trans, errno) \ 3435 do { \ 3436 /* Report first abort since mount */ \ 3437 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3438 &((trans)->fs_info->fs_state))) { \ 3439 if ((errno) != -EIO && (errno) != -EROFS) { \ 3440 WARN(1, KERN_DEBUG \ 3441 "BTRFS: Transaction aborted (error %d)\n", \ 3442 (errno)); \ 3443 } else { \ 3444 btrfs_debug((trans)->fs_info, \ 3445 "Transaction aborted (error %d)", \ 3446 (errno)); \ 3447 } \ 3448 } \ 3449 __btrfs_abort_transaction((trans), __func__, \ 3450 __LINE__, (errno)); \ 3451 } while (0) 3452 3453 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3454 do { \ 3455 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3456 (errno), fmt, ##args); \ 3457 } while (0) 3458 3459 __printf(5, 6) 3460 __cold 3461 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3462 unsigned int line, int errno, const char *fmt, ...); 3463 /* 3464 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3465 * will panic(). Otherwise we BUG() here. 3466 */ 3467 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3468 do { \ 3469 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3470 BUG(); \ 3471 } while (0) 3472 3473 3474 /* compatibility and incompatibility defines */ 3475 3476 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3477 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3478 #opt) 3479 3480 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3481 u64 flag, const char* name) 3482 { 3483 struct btrfs_super_block *disk_super; 3484 u64 features; 3485 3486 disk_super = fs_info->super_copy; 3487 features = btrfs_super_incompat_flags(disk_super); 3488 if (!(features & flag)) { 3489 spin_lock(&fs_info->super_lock); 3490 features = btrfs_super_incompat_flags(disk_super); 3491 if (!(features & flag)) { 3492 features |= flag; 3493 btrfs_set_super_incompat_flags(disk_super, features); 3494 btrfs_info(fs_info, 3495 "setting incompat feature flag for %s (0x%llx)", 3496 name, flag); 3497 } 3498 spin_unlock(&fs_info->super_lock); 3499 } 3500 } 3501 3502 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3503 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3504 #opt) 3505 3506 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3507 u64 flag, const char* name) 3508 { 3509 struct btrfs_super_block *disk_super; 3510 u64 features; 3511 3512 disk_super = fs_info->super_copy; 3513 features = btrfs_super_incompat_flags(disk_super); 3514 if (features & flag) { 3515 spin_lock(&fs_info->super_lock); 3516 features = btrfs_super_incompat_flags(disk_super); 3517 if (features & flag) { 3518 features &= ~flag; 3519 btrfs_set_super_incompat_flags(disk_super, features); 3520 btrfs_info(fs_info, 3521 "clearing incompat feature flag for %s (0x%llx)", 3522 name, flag); 3523 } 3524 spin_unlock(&fs_info->super_lock); 3525 } 3526 } 3527 3528 #define btrfs_fs_incompat(fs_info, opt) \ 3529 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3530 3531 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3532 { 3533 struct btrfs_super_block *disk_super; 3534 disk_super = fs_info->super_copy; 3535 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3536 } 3537 3538 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3539 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3540 #opt) 3541 3542 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3543 u64 flag, const char *name) 3544 { 3545 struct btrfs_super_block *disk_super; 3546 u64 features; 3547 3548 disk_super = fs_info->super_copy; 3549 features = btrfs_super_compat_ro_flags(disk_super); 3550 if (!(features & flag)) { 3551 spin_lock(&fs_info->super_lock); 3552 features = btrfs_super_compat_ro_flags(disk_super); 3553 if (!(features & flag)) { 3554 features |= flag; 3555 btrfs_set_super_compat_ro_flags(disk_super, features); 3556 btrfs_info(fs_info, 3557 "setting compat-ro feature flag for %s (0x%llx)", 3558 name, flag); 3559 } 3560 spin_unlock(&fs_info->super_lock); 3561 } 3562 } 3563 3564 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3565 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3566 #opt) 3567 3568 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3569 u64 flag, const char *name) 3570 { 3571 struct btrfs_super_block *disk_super; 3572 u64 features; 3573 3574 disk_super = fs_info->super_copy; 3575 features = btrfs_super_compat_ro_flags(disk_super); 3576 if (features & flag) { 3577 spin_lock(&fs_info->super_lock); 3578 features = btrfs_super_compat_ro_flags(disk_super); 3579 if (features & flag) { 3580 features &= ~flag; 3581 btrfs_set_super_compat_ro_flags(disk_super, features); 3582 btrfs_info(fs_info, 3583 "clearing compat-ro feature flag for %s (0x%llx)", 3584 name, flag); 3585 } 3586 spin_unlock(&fs_info->super_lock); 3587 } 3588 } 3589 3590 #define btrfs_fs_compat_ro(fs_info, opt) \ 3591 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3592 3593 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3594 { 3595 struct btrfs_super_block *disk_super; 3596 disk_super = fs_info->super_copy; 3597 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3598 } 3599 3600 /* acl.c */ 3601 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3602 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3603 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3604 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3605 struct inode *inode, struct inode *dir); 3606 #else 3607 #define btrfs_get_acl NULL 3608 #define btrfs_set_acl NULL 3609 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3610 struct inode *inode, struct inode *dir) 3611 { 3612 return 0; 3613 } 3614 #endif 3615 3616 /* relocation.c */ 3617 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3618 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3619 struct btrfs_root *root); 3620 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3621 struct btrfs_root *root); 3622 int btrfs_recover_relocation(struct btrfs_root *root); 3623 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3624 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3625 struct btrfs_root *root, struct extent_buffer *buf, 3626 struct extent_buffer *cow); 3627 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3628 u64 *bytes_to_reserve); 3629 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3630 struct btrfs_pending_snapshot *pending); 3631 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3632 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3633 u64 bytenr); 3634 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3635 3636 /* scrub.c */ 3637 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3638 u64 end, struct btrfs_scrub_progress *progress, 3639 int readonly, int is_dev_replace); 3640 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3641 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3642 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3643 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3644 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3645 struct btrfs_scrub_progress *progress); 3646 static inline void btrfs_init_full_stripe_locks_tree( 3647 struct btrfs_full_stripe_locks_tree *locks_root) 3648 { 3649 locks_root->root = RB_ROOT; 3650 mutex_init(&locks_root->lock); 3651 } 3652 3653 /* dev-replace.c */ 3654 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3655 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3656 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3657 3658 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3659 { 3660 btrfs_bio_counter_sub(fs_info, 1); 3661 } 3662 3663 /* reada.c */ 3664 struct reada_control { 3665 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3666 struct btrfs_key key_start; 3667 struct btrfs_key key_end; /* exclusive */ 3668 atomic_t elems; 3669 struct kref refcnt; 3670 wait_queue_head_t wait; 3671 }; 3672 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3673 struct btrfs_key *start, struct btrfs_key *end); 3674 int btrfs_reada_wait(void *handle); 3675 void btrfs_reada_detach(void *handle); 3676 int btree_readahead_hook(struct extent_buffer *eb, int err); 3677 void btrfs_reada_remove_dev(struct btrfs_device *dev); 3678 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3679 3680 static inline int is_fstree(u64 rootid) 3681 { 3682 if (rootid == BTRFS_FS_TREE_OBJECTID || 3683 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3684 !btrfs_qgroup_level(rootid))) 3685 return 1; 3686 return 0; 3687 } 3688 3689 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3690 { 3691 return signal_pending(current); 3692 } 3693 3694 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3695 3696 /* Sanity test specific functions */ 3697 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3698 void btrfs_test_destroy_inode(struct inode *inode); 3699 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3700 { 3701 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3702 } 3703 #else 3704 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3705 { 3706 return 0; 3707 } 3708 #endif 3709 3710 static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info) 3711 { 3712 return fs_info->zoned != 0; 3713 } 3714 3715 #endif 3716