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/kmap_types.h> 21 #include <asm/unaligned.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent-io-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 * the max metadata block size. This limit is somewhat artificial, 71 * but the memmove costs go through the roof for larger blocks. 72 */ 73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 74 75 /* 76 * we can actually store much bigger names, but lets not confuse the rest 77 * of linux 78 */ 79 #define BTRFS_NAME_LEN 255 80 81 /* 82 * Theoretical limit is larger, but we keep this down to a sane 83 * value. That should limit greatly the possibility of collisions on 84 * inode ref items. 85 */ 86 #define BTRFS_LINK_MAX 65535U 87 88 #define BTRFS_EMPTY_DIR_SIZE 0 89 90 /* ioprio of readahead is set to idle */ 91 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 92 93 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 94 95 /* 96 * Use large batch size to reduce overhead of metadata updates. On the reader 97 * side, we only read it when we are close to ENOSPC and the read overhead is 98 * mostly related to the number of CPUs, so it is OK to use arbitrary large 99 * value here. 100 */ 101 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 102 103 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 104 105 /* 106 * Deltas are an effective way to populate global statistics. Give macro names 107 * to make it clear what we're doing. An example is discard_extents in 108 * btrfs_free_space_ctl. 109 */ 110 #define BTRFS_STAT_NR_ENTRIES 2 111 #define BTRFS_STAT_CURR 0 112 #define BTRFS_STAT_PREV 1 113 114 /* 115 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 116 */ 117 static inline u32 count_max_extents(u64 size) 118 { 119 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 120 } 121 122 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 123 { 124 BUG_ON(num_stripes == 0); 125 return sizeof(struct btrfs_chunk) + 126 sizeof(struct btrfs_stripe) * (num_stripes - 1); 127 } 128 129 /* 130 * Runtime (in-memory) states of filesystem 131 */ 132 enum { 133 /* Global indicator of serious filesystem errors */ 134 BTRFS_FS_STATE_ERROR, 135 /* 136 * Filesystem is being remounted, allow to skip some operations, like 137 * defrag 138 */ 139 BTRFS_FS_STATE_REMOUNTING, 140 /* Track if a transaction abort has been reported on this filesystem */ 141 BTRFS_FS_STATE_TRANS_ABORTED, 142 /* 143 * Bio operations should be blocked on this filesystem because a source 144 * or target device is being destroyed as part of a device replace 145 */ 146 BTRFS_FS_STATE_DEV_REPLACING, 147 /* The btrfs_fs_info created for self-tests */ 148 BTRFS_FS_STATE_DUMMY_FS_INFO, 149 }; 150 151 #define BTRFS_BACKREF_REV_MAX 256 152 #define BTRFS_BACKREF_REV_SHIFT 56 153 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 154 BTRFS_BACKREF_REV_SHIFT) 155 156 #define BTRFS_OLD_BACKREF_REV 0 157 #define BTRFS_MIXED_BACKREF_REV 1 158 159 /* 160 * every tree block (leaf or node) starts with this header. 161 */ 162 struct btrfs_header { 163 /* these first four must match the super block */ 164 u8 csum[BTRFS_CSUM_SIZE]; 165 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 166 __le64 bytenr; /* which block this node is supposed to live in */ 167 __le64 flags; 168 169 /* allowed to be different from the super from here on down */ 170 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 171 __le64 generation; 172 __le64 owner; 173 __le32 nritems; 174 u8 level; 175 } __attribute__ ((__packed__)); 176 177 /* 178 * this is a very generous portion of the super block, giving us 179 * room to translate 14 chunks with 3 stripes each. 180 */ 181 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 182 183 /* 184 * just in case we somehow lose the roots and are not able to mount, 185 * we store an array of the roots from previous transactions 186 * in the super. 187 */ 188 #define BTRFS_NUM_BACKUP_ROOTS 4 189 struct btrfs_root_backup { 190 __le64 tree_root; 191 __le64 tree_root_gen; 192 193 __le64 chunk_root; 194 __le64 chunk_root_gen; 195 196 __le64 extent_root; 197 __le64 extent_root_gen; 198 199 __le64 fs_root; 200 __le64 fs_root_gen; 201 202 __le64 dev_root; 203 __le64 dev_root_gen; 204 205 __le64 csum_root; 206 __le64 csum_root_gen; 207 208 __le64 total_bytes; 209 __le64 bytes_used; 210 __le64 num_devices; 211 /* future */ 212 __le64 unused_64[4]; 213 214 u8 tree_root_level; 215 u8 chunk_root_level; 216 u8 extent_root_level; 217 u8 fs_root_level; 218 u8 dev_root_level; 219 u8 csum_root_level; 220 /* future and to align */ 221 u8 unused_8[10]; 222 } __attribute__ ((__packed__)); 223 224 /* 225 * the super block basically lists the main trees of the FS 226 * it currently lacks any block count etc etc 227 */ 228 struct btrfs_super_block { 229 /* the first 4 fields must match struct btrfs_header */ 230 u8 csum[BTRFS_CSUM_SIZE]; 231 /* FS specific UUID, visible to user */ 232 u8 fsid[BTRFS_FSID_SIZE]; 233 __le64 bytenr; /* this block number */ 234 __le64 flags; 235 236 /* allowed to be different from the btrfs_header from here own down */ 237 __le64 magic; 238 __le64 generation; 239 __le64 root; 240 __le64 chunk_root; 241 __le64 log_root; 242 243 /* this will help find the new super based on the log root */ 244 __le64 log_root_transid; 245 __le64 total_bytes; 246 __le64 bytes_used; 247 __le64 root_dir_objectid; 248 __le64 num_devices; 249 __le32 sectorsize; 250 __le32 nodesize; 251 __le32 __unused_leafsize; 252 __le32 stripesize; 253 __le32 sys_chunk_array_size; 254 __le64 chunk_root_generation; 255 __le64 compat_flags; 256 __le64 compat_ro_flags; 257 __le64 incompat_flags; 258 __le16 csum_type; 259 u8 root_level; 260 u8 chunk_root_level; 261 u8 log_root_level; 262 struct btrfs_dev_item dev_item; 263 264 char label[BTRFS_LABEL_SIZE]; 265 266 __le64 cache_generation; 267 __le64 uuid_tree_generation; 268 269 /* the UUID written into btree blocks */ 270 u8 metadata_uuid[BTRFS_FSID_SIZE]; 271 272 /* future expansion */ 273 __le64 reserved[28]; 274 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 275 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 276 } __attribute__ ((__packed__)); 277 278 /* 279 * Compat flags that we support. If any incompat flags are set other than the 280 * ones specified below then we will fail to mount 281 */ 282 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 283 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 284 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 285 286 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 287 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 288 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 289 290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 292 293 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 294 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 295 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 296 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 297 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 298 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 299 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 300 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 301 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 302 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 303 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 304 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 305 BTRFS_FEATURE_INCOMPAT_RAID1C34) 306 307 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 308 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 309 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 310 311 /* 312 * A leaf is full of items. offset and size tell us where to find 313 * the item in the leaf (relative to the start of the data area) 314 */ 315 struct btrfs_item { 316 struct btrfs_disk_key key; 317 __le32 offset; 318 __le32 size; 319 } __attribute__ ((__packed__)); 320 321 /* 322 * leaves have an item area and a data area: 323 * [item0, item1....itemN] [free space] [dataN...data1, data0] 324 * 325 * The data is separate from the items to get the keys closer together 326 * during searches. 327 */ 328 struct btrfs_leaf { 329 struct btrfs_header header; 330 struct btrfs_item items[]; 331 } __attribute__ ((__packed__)); 332 333 /* 334 * all non-leaf blocks are nodes, they hold only keys and pointers to 335 * other blocks 336 */ 337 struct btrfs_key_ptr { 338 struct btrfs_disk_key key; 339 __le64 blockptr; 340 __le64 generation; 341 } __attribute__ ((__packed__)); 342 343 struct btrfs_node { 344 struct btrfs_header header; 345 struct btrfs_key_ptr ptrs[]; 346 } __attribute__ ((__packed__)); 347 348 /* 349 * btrfs_paths remember the path taken from the root down to the leaf. 350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 351 * to any other levels that are present. 352 * 353 * The slots array records the index of the item or block pointer 354 * used while walking the tree. 355 */ 356 enum { READA_NONE, READA_BACK, READA_FORWARD }; 357 struct btrfs_path { 358 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 359 int slots[BTRFS_MAX_LEVEL]; 360 /* if there is real range locking, this locks field will change */ 361 u8 locks[BTRFS_MAX_LEVEL]; 362 u8 reada; 363 /* keep some upper locks as we walk down */ 364 u8 lowest_level; 365 366 /* 367 * set by btrfs_split_item, tells search_slot to keep all locks 368 * and to force calls to keep space in the nodes 369 */ 370 unsigned int search_for_split:1; 371 unsigned int keep_locks:1; 372 unsigned int skip_locking:1; 373 unsigned int leave_spinning:1; 374 unsigned int search_commit_root:1; 375 unsigned int need_commit_sem:1; 376 unsigned int skip_release_on_error:1; 377 unsigned int recurse:1; 378 }; 379 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 380 sizeof(struct btrfs_item)) 381 struct btrfs_dev_replace { 382 u64 replace_state; /* see #define above */ 383 time64_t time_started; /* seconds since 1-Jan-1970 */ 384 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 385 atomic64_t num_write_errors; 386 atomic64_t num_uncorrectable_read_errors; 387 388 u64 cursor_left; 389 u64 committed_cursor_left; 390 u64 cursor_left_last_write_of_item; 391 u64 cursor_right; 392 393 u64 cont_reading_from_srcdev_mode; /* see #define above */ 394 395 int is_valid; 396 int item_needs_writeback; 397 struct btrfs_device *srcdev; 398 struct btrfs_device *tgtdev; 399 400 struct mutex lock_finishing_cancel_unmount; 401 struct rw_semaphore rwsem; 402 403 struct btrfs_scrub_progress scrub_progress; 404 405 struct percpu_counter bio_counter; 406 wait_queue_head_t replace_wait; 407 }; 408 409 /* 410 * free clusters are used to claim free space in relatively large chunks, 411 * allowing us to do less seeky writes. They are used for all metadata 412 * allocations. In ssd_spread mode they are also used for data allocations. 413 */ 414 struct btrfs_free_cluster { 415 spinlock_t lock; 416 spinlock_t refill_lock; 417 struct rb_root root; 418 419 /* largest extent in this cluster */ 420 u64 max_size; 421 422 /* first extent starting offset */ 423 u64 window_start; 424 425 /* We did a full search and couldn't create a cluster */ 426 bool fragmented; 427 428 struct btrfs_block_group *block_group; 429 /* 430 * when a cluster is allocated from a block group, we put the 431 * cluster onto a list in the block group so that it can 432 * be freed before the block group is freed. 433 */ 434 struct list_head block_group_list; 435 }; 436 437 enum btrfs_caching_type { 438 BTRFS_CACHE_NO, 439 BTRFS_CACHE_STARTED, 440 BTRFS_CACHE_FAST, 441 BTRFS_CACHE_FINISHED, 442 BTRFS_CACHE_ERROR, 443 }; 444 445 /* 446 * Tree to record all locked full stripes of a RAID5/6 block group 447 */ 448 struct btrfs_full_stripe_locks_tree { 449 struct rb_root root; 450 struct mutex lock; 451 }; 452 453 /* Discard control. */ 454 /* 455 * Async discard uses multiple lists to differentiate the discard filter 456 * parameters. Index 0 is for completely free block groups where we need to 457 * ensure the entire block group is trimmed without being lossy. Indices 458 * afterwards represent monotonically decreasing discard filter sizes to 459 * prioritize what should be discarded next. 460 */ 461 #define BTRFS_NR_DISCARD_LISTS 3 462 #define BTRFS_DISCARD_INDEX_UNUSED 0 463 #define BTRFS_DISCARD_INDEX_START 1 464 465 struct btrfs_discard_ctl { 466 struct workqueue_struct *discard_workers; 467 struct delayed_work work; 468 spinlock_t lock; 469 struct btrfs_block_group *block_group; 470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 471 u64 prev_discard; 472 atomic_t discardable_extents; 473 atomic64_t discardable_bytes; 474 u64 max_discard_size; 475 unsigned long delay; 476 u32 iops_limit; 477 u32 kbps_limit; 478 u64 discard_extent_bytes; 479 u64 discard_bitmap_bytes; 480 atomic64_t discard_bytes_saved; 481 }; 482 483 /* delayed seq elem */ 484 struct seq_list { 485 struct list_head list; 486 u64 seq; 487 }; 488 489 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 490 491 #define SEQ_LAST ((u64)-1) 492 493 enum btrfs_orphan_cleanup_state { 494 ORPHAN_CLEANUP_STARTED = 1, 495 ORPHAN_CLEANUP_DONE = 2, 496 }; 497 498 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info); 499 500 /* fs_info */ 501 struct reloc_control; 502 struct btrfs_device; 503 struct btrfs_fs_devices; 504 struct btrfs_balance_control; 505 struct btrfs_delayed_root; 506 507 /* 508 * Block group or device which contains an active swapfile. Used for preventing 509 * unsafe operations while a swapfile is active. 510 * 511 * These are sorted on (ptr, inode) (note that a block group or device can 512 * contain more than one swapfile). We compare the pointer values because we 513 * don't actually care what the object is, we just need a quick check whether 514 * the object exists in the rbtree. 515 */ 516 struct btrfs_swapfile_pin { 517 struct rb_node node; 518 void *ptr; 519 struct inode *inode; 520 /* 521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 522 * points to a struct btrfs_device. 523 */ 524 bool is_block_group; 525 }; 526 527 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 528 529 enum { 530 BTRFS_FS_BARRIER, 531 BTRFS_FS_CLOSING_START, 532 BTRFS_FS_CLOSING_DONE, 533 BTRFS_FS_LOG_RECOVERING, 534 BTRFS_FS_OPEN, 535 BTRFS_FS_QUOTA_ENABLED, 536 BTRFS_FS_UPDATE_UUID_TREE_GEN, 537 BTRFS_FS_CREATING_FREE_SPACE_TREE, 538 BTRFS_FS_BTREE_ERR, 539 BTRFS_FS_LOG1_ERR, 540 BTRFS_FS_LOG2_ERR, 541 BTRFS_FS_QUOTA_OVERRIDE, 542 /* Used to record internally whether fs has been frozen */ 543 BTRFS_FS_FROZEN, 544 /* 545 * Indicate that balance has been set up from the ioctl and is in the 546 * main phase. The fs_info::balance_ctl is initialized. 547 * Set and cleared while holding fs_info::balance_mutex. 548 */ 549 BTRFS_FS_BALANCE_RUNNING, 550 551 /* Indicate that the cleaner thread is awake and doing something. */ 552 BTRFS_FS_CLEANER_RUNNING, 553 554 /* 555 * The checksumming has an optimized version and is considered fast, 556 * so we don't need to offload checksums to workqueues. 557 */ 558 BTRFS_FS_CSUM_IMPL_FAST, 559 560 /* Indicate that the discard workqueue can service discards. */ 561 BTRFS_FS_DISCARD_RUNNING, 562 }; 563 564 /* 565 * Exclusive operations (device replace, resize, device add/remove, balance) 566 */ 567 enum btrfs_exclusive_operation { 568 BTRFS_EXCLOP_NONE, 569 BTRFS_EXCLOP_BALANCE, 570 BTRFS_EXCLOP_DEV_ADD, 571 BTRFS_EXCLOP_DEV_REMOVE, 572 BTRFS_EXCLOP_DEV_REPLACE, 573 BTRFS_EXCLOP_RESIZE, 574 BTRFS_EXCLOP_SWAP_ACTIVATE, 575 }; 576 577 struct btrfs_fs_info { 578 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 579 unsigned long flags; 580 struct btrfs_root *extent_root; 581 struct btrfs_root *tree_root; 582 struct btrfs_root *chunk_root; 583 struct btrfs_root *dev_root; 584 struct btrfs_root *fs_root; 585 struct btrfs_root *csum_root; 586 struct btrfs_root *quota_root; 587 struct btrfs_root *uuid_root; 588 struct btrfs_root *free_space_root; 589 struct btrfs_root *data_reloc_root; 590 591 /* the log root tree is a directory of all the other log roots */ 592 struct btrfs_root *log_root_tree; 593 594 spinlock_t fs_roots_radix_lock; 595 struct radix_tree_root fs_roots_radix; 596 597 /* block group cache stuff */ 598 spinlock_t block_group_cache_lock; 599 u64 first_logical_byte; 600 struct rb_root block_group_cache_tree; 601 602 /* keep track of unallocated space */ 603 atomic64_t free_chunk_space; 604 605 /* Track ranges which are used by log trees blocks/logged data extents */ 606 struct extent_io_tree excluded_extents; 607 608 /* logical->physical extent mapping */ 609 struct extent_map_tree mapping_tree; 610 611 /* 612 * block reservation for extent, checksum, root tree and 613 * delayed dir index item 614 */ 615 struct btrfs_block_rsv global_block_rsv; 616 /* block reservation for metadata operations */ 617 struct btrfs_block_rsv trans_block_rsv; 618 /* block reservation for chunk tree */ 619 struct btrfs_block_rsv chunk_block_rsv; 620 /* block reservation for delayed operations */ 621 struct btrfs_block_rsv delayed_block_rsv; 622 /* block reservation for delayed refs */ 623 struct btrfs_block_rsv delayed_refs_rsv; 624 625 struct btrfs_block_rsv empty_block_rsv; 626 627 u64 generation; 628 u64 last_trans_committed; 629 u64 avg_delayed_ref_runtime; 630 631 /* 632 * this is updated to the current trans every time a full commit 633 * is required instead of the faster short fsync log commits 634 */ 635 u64 last_trans_log_full_commit; 636 unsigned long mount_opt; 637 /* 638 * Track requests for actions that need to be done during transaction 639 * commit (like for some mount options). 640 */ 641 unsigned long pending_changes; 642 unsigned long compress_type:4; 643 unsigned int compress_level; 644 u32 commit_interval; 645 /* 646 * It is a suggestive number, the read side is safe even it gets a 647 * wrong number because we will write out the data into a regular 648 * extent. The write side(mount/remount) is under ->s_umount lock, 649 * so it is also safe. 650 */ 651 u64 max_inline; 652 653 struct btrfs_transaction *running_transaction; 654 wait_queue_head_t transaction_throttle; 655 wait_queue_head_t transaction_wait; 656 wait_queue_head_t transaction_blocked_wait; 657 wait_queue_head_t async_submit_wait; 658 659 /* 660 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 661 * when they are updated. 662 * 663 * Because we do not clear the flags for ever, so we needn't use 664 * the lock on the read side. 665 * 666 * We also needn't use the lock when we mount the fs, because 667 * there is no other task which will update the flag. 668 */ 669 spinlock_t super_lock; 670 struct btrfs_super_block *super_copy; 671 struct btrfs_super_block *super_for_commit; 672 struct super_block *sb; 673 struct inode *btree_inode; 674 struct mutex tree_log_mutex; 675 struct mutex transaction_kthread_mutex; 676 struct mutex cleaner_mutex; 677 struct mutex chunk_mutex; 678 679 /* 680 * this is taken to make sure we don't set block groups ro after 681 * the free space cache has been allocated on them 682 */ 683 struct mutex ro_block_group_mutex; 684 685 /* this is used during read/modify/write to make sure 686 * no two ios are trying to mod the same stripe at the same 687 * time 688 */ 689 struct btrfs_stripe_hash_table *stripe_hash_table; 690 691 /* 692 * this protects the ordered operations list only while we are 693 * processing all of the entries on it. This way we make 694 * sure the commit code doesn't find the list temporarily empty 695 * because another function happens to be doing non-waiting preflush 696 * before jumping into the main commit. 697 */ 698 struct mutex ordered_operations_mutex; 699 700 struct rw_semaphore commit_root_sem; 701 702 struct rw_semaphore cleanup_work_sem; 703 704 struct rw_semaphore subvol_sem; 705 706 spinlock_t trans_lock; 707 /* 708 * the reloc mutex goes with the trans lock, it is taken 709 * during commit to protect us from the relocation code 710 */ 711 struct mutex reloc_mutex; 712 713 struct list_head trans_list; 714 struct list_head dead_roots; 715 struct list_head caching_block_groups; 716 717 spinlock_t delayed_iput_lock; 718 struct list_head delayed_iputs; 719 atomic_t nr_delayed_iputs; 720 wait_queue_head_t delayed_iputs_wait; 721 722 atomic64_t tree_mod_seq; 723 724 /* this protects tree_mod_log and tree_mod_seq_list */ 725 rwlock_t tree_mod_log_lock; 726 struct rb_root tree_mod_log; 727 struct list_head tree_mod_seq_list; 728 729 atomic_t async_delalloc_pages; 730 731 /* 732 * this is used to protect the following list -- ordered_roots. 733 */ 734 spinlock_t ordered_root_lock; 735 736 /* 737 * all fs/file tree roots in which there are data=ordered extents 738 * pending writeback are added into this list. 739 * 740 * these can span multiple transactions and basically include 741 * every dirty data page that isn't from nodatacow 742 */ 743 struct list_head ordered_roots; 744 745 struct mutex delalloc_root_mutex; 746 spinlock_t delalloc_root_lock; 747 /* all fs/file tree roots that have delalloc inodes. */ 748 struct list_head delalloc_roots; 749 750 /* 751 * there is a pool of worker threads for checksumming during writes 752 * and a pool for checksumming after reads. This is because readers 753 * can run with FS locks held, and the writers may be waiting for 754 * those locks. We don't want ordering in the pending list to cause 755 * deadlocks, and so the two are serviced separately. 756 * 757 * A third pool does submit_bio to avoid deadlocking with the other 758 * two 759 */ 760 struct btrfs_workqueue *workers; 761 struct btrfs_workqueue *delalloc_workers; 762 struct btrfs_workqueue *flush_workers; 763 struct btrfs_workqueue *endio_workers; 764 struct btrfs_workqueue *endio_meta_workers; 765 struct btrfs_workqueue *endio_raid56_workers; 766 struct btrfs_workqueue *rmw_workers; 767 struct btrfs_workqueue *endio_meta_write_workers; 768 struct btrfs_workqueue *endio_write_workers; 769 struct btrfs_workqueue *endio_freespace_worker; 770 struct btrfs_workqueue *caching_workers; 771 struct btrfs_workqueue *readahead_workers; 772 773 /* 774 * fixup workers take dirty pages that didn't properly go through 775 * the cow mechanism and make them safe to write. It happens 776 * for the sys_munmap function call path 777 */ 778 struct btrfs_workqueue *fixup_workers; 779 struct btrfs_workqueue *delayed_workers; 780 781 struct task_struct *transaction_kthread; 782 struct task_struct *cleaner_kthread; 783 u32 thread_pool_size; 784 785 struct kobject *space_info_kobj; 786 struct kobject *qgroups_kobj; 787 788 u64 total_pinned; 789 790 /* used to keep from writing metadata until there is a nice batch */ 791 struct percpu_counter dirty_metadata_bytes; 792 struct percpu_counter delalloc_bytes; 793 struct percpu_counter dio_bytes; 794 s32 dirty_metadata_batch; 795 s32 delalloc_batch; 796 797 struct list_head dirty_cowonly_roots; 798 799 struct btrfs_fs_devices *fs_devices; 800 801 /* 802 * The space_info list is effectively read only after initial 803 * setup. It is populated at mount time and cleaned up after 804 * all block groups are removed. RCU is used to protect it. 805 */ 806 struct list_head space_info; 807 808 struct btrfs_space_info *data_sinfo; 809 810 struct reloc_control *reloc_ctl; 811 812 /* data_alloc_cluster is only used in ssd_spread mode */ 813 struct btrfs_free_cluster data_alloc_cluster; 814 815 /* all metadata allocations go through this cluster */ 816 struct btrfs_free_cluster meta_alloc_cluster; 817 818 /* auto defrag inodes go here */ 819 spinlock_t defrag_inodes_lock; 820 struct rb_root defrag_inodes; 821 atomic_t defrag_running; 822 823 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 824 seqlock_t profiles_lock; 825 /* 826 * these three are in extended format (availability of single 827 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 828 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 829 */ 830 u64 avail_data_alloc_bits; 831 u64 avail_metadata_alloc_bits; 832 u64 avail_system_alloc_bits; 833 834 /* restriper state */ 835 spinlock_t balance_lock; 836 struct mutex balance_mutex; 837 atomic_t balance_pause_req; 838 atomic_t balance_cancel_req; 839 struct btrfs_balance_control *balance_ctl; 840 wait_queue_head_t balance_wait_q; 841 842 u32 data_chunk_allocations; 843 u32 metadata_ratio; 844 845 void *bdev_holder; 846 847 /* private scrub information */ 848 struct mutex scrub_lock; 849 atomic_t scrubs_running; 850 atomic_t scrub_pause_req; 851 atomic_t scrubs_paused; 852 atomic_t scrub_cancel_req; 853 wait_queue_head_t scrub_pause_wait; 854 /* 855 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 856 * running. 857 */ 858 refcount_t scrub_workers_refcnt; 859 struct btrfs_workqueue *scrub_workers; 860 struct btrfs_workqueue *scrub_wr_completion_workers; 861 struct btrfs_workqueue *scrub_parity_workers; 862 863 struct btrfs_discard_ctl discard_ctl; 864 865 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 866 u32 check_integrity_print_mask; 867 #endif 868 /* is qgroup tracking in a consistent state? */ 869 u64 qgroup_flags; 870 871 /* holds configuration and tracking. Protected by qgroup_lock */ 872 struct rb_root qgroup_tree; 873 spinlock_t qgroup_lock; 874 875 /* 876 * used to avoid frequently calling ulist_alloc()/ulist_free() 877 * when doing qgroup accounting, it must be protected by qgroup_lock. 878 */ 879 struct ulist *qgroup_ulist; 880 881 /* protect user change for quota operations */ 882 struct mutex qgroup_ioctl_lock; 883 884 /* list of dirty qgroups to be written at next commit */ 885 struct list_head dirty_qgroups; 886 887 /* used by qgroup for an efficient tree traversal */ 888 u64 qgroup_seq; 889 890 /* qgroup rescan items */ 891 struct mutex qgroup_rescan_lock; /* protects the progress item */ 892 struct btrfs_key qgroup_rescan_progress; 893 struct btrfs_workqueue *qgroup_rescan_workers; 894 struct completion qgroup_rescan_completion; 895 struct btrfs_work qgroup_rescan_work; 896 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 897 898 /* filesystem state */ 899 unsigned long fs_state; 900 901 struct btrfs_delayed_root *delayed_root; 902 903 /* readahead tree */ 904 spinlock_t reada_lock; 905 struct radix_tree_root reada_tree; 906 907 /* readahead works cnt */ 908 atomic_t reada_works_cnt; 909 910 /* Extent buffer radix tree */ 911 spinlock_t buffer_lock; 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 u32 stripesize; 935 936 /* Block groups and devices containing active swapfiles. */ 937 spinlock_t swapfile_pins_lock; 938 struct rb_root swapfile_pins; 939 940 struct crypto_shash *csum_shash; 941 942 /* 943 * Number of send operations in progress. 944 * Updated while holding fs_info::balance_mutex. 945 */ 946 int send_in_progress; 947 948 /* Type of exclusive operation running */ 949 unsigned long exclusive_operation; 950 951 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 952 spinlock_t ref_verify_lock; 953 struct rb_root block_tree; 954 #endif 955 956 #ifdef CONFIG_BTRFS_DEBUG 957 struct kobject *debug_kobj; 958 struct kobject *discard_debug_kobj; 959 struct list_head allocated_roots; 960 961 spinlock_t eb_leak_lock; 962 struct list_head allocated_ebs; 963 #endif 964 }; 965 966 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 967 { 968 return sb->s_fs_info; 969 } 970 971 /* 972 * The state of btrfs root 973 */ 974 enum { 975 /* 976 * btrfs_record_root_in_trans is a multi-step process, and it can race 977 * with the balancing code. But the race is very small, and only the 978 * first time the root is added to each transaction. So IN_TRANS_SETUP 979 * is used to tell us when more checks are required 980 */ 981 BTRFS_ROOT_IN_TRANS_SETUP, 982 983 /* 984 * Set if tree blocks of this root can be shared by other roots. 985 * Only subvolume trees and their reloc trees have this bit set. 986 * Conflicts with TRACK_DIRTY bit. 987 * 988 * This affects two things: 989 * 990 * - How balance works 991 * For shareable roots, we need to use reloc tree and do path 992 * replacement for balance, and need various pre/post hooks for 993 * snapshot creation to handle them. 994 * 995 * While for non-shareable trees, we just simply do a tree search 996 * with COW. 997 * 998 * - How dirty roots are tracked 999 * For shareable roots, btrfs_record_root_in_trans() is needed to 1000 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1001 * don't need to set this manually. 1002 */ 1003 BTRFS_ROOT_SHAREABLE, 1004 BTRFS_ROOT_TRACK_DIRTY, 1005 BTRFS_ROOT_IN_RADIX, 1006 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1007 BTRFS_ROOT_DEFRAG_RUNNING, 1008 BTRFS_ROOT_FORCE_COW, 1009 BTRFS_ROOT_MULTI_LOG_TASKS, 1010 BTRFS_ROOT_DIRTY, 1011 BTRFS_ROOT_DELETING, 1012 1013 /* 1014 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1015 * 1016 * Set for the subvolume tree owning the reloc tree. 1017 */ 1018 BTRFS_ROOT_DEAD_RELOC_TREE, 1019 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1020 BTRFS_ROOT_DEAD_TREE, 1021 /* The root has a log tree. Used only for subvolume roots. */ 1022 BTRFS_ROOT_HAS_LOG_TREE, 1023 /* Qgroup flushing is in progress */ 1024 BTRFS_ROOT_QGROUP_FLUSHING, 1025 }; 1026 1027 /* 1028 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1029 * code. For detail check comment in fs/btrfs/qgroup.c. 1030 */ 1031 struct btrfs_qgroup_swapped_blocks { 1032 spinlock_t lock; 1033 /* RM_EMPTY_ROOT() of above blocks[] */ 1034 bool swapped; 1035 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1036 }; 1037 1038 /* 1039 * in ram representation of the tree. extent_root is used for all allocations 1040 * and for the extent tree extent_root root. 1041 */ 1042 struct btrfs_root { 1043 struct extent_buffer *node; 1044 1045 struct extent_buffer *commit_root; 1046 struct btrfs_root *log_root; 1047 struct btrfs_root *reloc_root; 1048 1049 unsigned long state; 1050 struct btrfs_root_item root_item; 1051 struct btrfs_key root_key; 1052 struct btrfs_fs_info *fs_info; 1053 struct extent_io_tree dirty_log_pages; 1054 1055 struct mutex objectid_mutex; 1056 1057 spinlock_t accounting_lock; 1058 struct btrfs_block_rsv *block_rsv; 1059 1060 /* free ino cache stuff */ 1061 struct btrfs_free_space_ctl *free_ino_ctl; 1062 enum btrfs_caching_type ino_cache_state; 1063 spinlock_t ino_cache_lock; 1064 wait_queue_head_t ino_cache_wait; 1065 struct btrfs_free_space_ctl *free_ino_pinned; 1066 u64 ino_cache_progress; 1067 struct inode *ino_cache_inode; 1068 1069 struct mutex log_mutex; 1070 wait_queue_head_t log_writer_wait; 1071 wait_queue_head_t log_commit_wait[2]; 1072 struct list_head log_ctxs[2]; 1073 /* Used only for log trees of subvolumes, not for the log root tree */ 1074 atomic_t log_writers; 1075 atomic_t log_commit[2]; 1076 /* Used only for log trees of subvolumes, not for the log root tree */ 1077 atomic_t log_batch; 1078 int log_transid; 1079 /* No matter the commit succeeds or not*/ 1080 int log_transid_committed; 1081 /* Just be updated when the commit succeeds. */ 1082 int last_log_commit; 1083 pid_t log_start_pid; 1084 1085 u64 last_trans; 1086 1087 u32 type; 1088 1089 u64 highest_objectid; 1090 1091 struct btrfs_key defrag_progress; 1092 struct btrfs_key defrag_max; 1093 1094 /* The dirty list is only used by non-shareable roots */ 1095 struct list_head dirty_list; 1096 1097 struct list_head root_list; 1098 1099 spinlock_t log_extents_lock[2]; 1100 struct list_head logged_list[2]; 1101 1102 int orphan_cleanup_state; 1103 1104 spinlock_t inode_lock; 1105 /* red-black tree that keeps track of in-memory inodes */ 1106 struct rb_root inode_tree; 1107 1108 /* 1109 * radix tree that keeps track of delayed nodes of every inode, 1110 * protected by inode_lock 1111 */ 1112 struct radix_tree_root delayed_nodes_tree; 1113 /* 1114 * right now this just gets used so that a root has its own devid 1115 * for stat. It may be used for more later 1116 */ 1117 dev_t anon_dev; 1118 1119 spinlock_t root_item_lock; 1120 refcount_t refs; 1121 1122 struct mutex delalloc_mutex; 1123 spinlock_t delalloc_lock; 1124 /* 1125 * all of the inodes that have delalloc bytes. It is possible for 1126 * this list to be empty even when there is still dirty data=ordered 1127 * extents waiting to finish IO. 1128 */ 1129 struct list_head delalloc_inodes; 1130 struct list_head delalloc_root; 1131 u64 nr_delalloc_inodes; 1132 1133 struct mutex ordered_extent_mutex; 1134 /* 1135 * this is used by the balancing code to wait for all the pending 1136 * ordered extents 1137 */ 1138 spinlock_t ordered_extent_lock; 1139 1140 /* 1141 * all of the data=ordered extents pending writeback 1142 * these can span multiple transactions and basically include 1143 * every dirty data page that isn't from nodatacow 1144 */ 1145 struct list_head ordered_extents; 1146 struct list_head ordered_root; 1147 u64 nr_ordered_extents; 1148 1149 /* 1150 * Not empty if this subvolume root has gone through tree block swap 1151 * (relocation) 1152 * 1153 * Will be used by reloc_control::dirty_subvol_roots. 1154 */ 1155 struct list_head reloc_dirty_list; 1156 1157 /* 1158 * Number of currently running SEND ioctls to prevent 1159 * manipulation with the read-only status via SUBVOL_SETFLAGS 1160 */ 1161 int send_in_progress; 1162 /* 1163 * Number of currently running deduplication operations that have a 1164 * destination inode belonging to this root. Protected by the lock 1165 * root_item_lock. 1166 */ 1167 int dedupe_in_progress; 1168 /* For exclusion of snapshot creation and nocow writes */ 1169 struct btrfs_drew_lock snapshot_lock; 1170 1171 atomic_t snapshot_force_cow; 1172 1173 /* For qgroup metadata reserved space */ 1174 spinlock_t qgroup_meta_rsv_lock; 1175 u64 qgroup_meta_rsv_pertrans; 1176 u64 qgroup_meta_rsv_prealloc; 1177 wait_queue_head_t qgroup_flush_wait; 1178 1179 /* Number of active swapfiles */ 1180 atomic_t nr_swapfiles; 1181 1182 /* Record pairs of swapped blocks for qgroup */ 1183 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1184 1185 /* Used only by log trees, when logging csum items */ 1186 struct extent_io_tree log_csum_range; 1187 1188 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1189 u64 alloc_bytenr; 1190 #endif 1191 1192 #ifdef CONFIG_BTRFS_DEBUG 1193 struct list_head leak_list; 1194 #endif 1195 }; 1196 1197 /* 1198 * Structure that conveys information about an extent that is going to replace 1199 * all the extents in a file range. 1200 */ 1201 struct btrfs_replace_extent_info { 1202 u64 disk_offset; 1203 u64 disk_len; 1204 u64 data_offset; 1205 u64 data_len; 1206 u64 file_offset; 1207 /* Pointer to a file extent item of type regular or prealloc. */ 1208 char *extent_buf; 1209 /* 1210 * Set to true when attempting to replace a file range with a new extent 1211 * described by this structure, set to false when attempting to clone an 1212 * existing extent into a file range. 1213 */ 1214 bool is_new_extent; 1215 /* Meaningful only if is_new_extent is true. */ 1216 int qgroup_reserved; 1217 /* 1218 * Meaningful only if is_new_extent is true. 1219 * Used to track how many extent items we have already inserted in a 1220 * subvolume tree that refer to the extent described by this structure, 1221 * so that we know when to create a new delayed ref or update an existing 1222 * one. 1223 */ 1224 int insertions; 1225 }; 1226 1227 struct btrfs_file_private { 1228 void *filldir_buf; 1229 }; 1230 1231 1232 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1233 { 1234 1235 return info->nodesize - sizeof(struct btrfs_header); 1236 } 1237 1238 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1239 1240 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1241 { 1242 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1243 } 1244 1245 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1246 { 1247 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1248 } 1249 1250 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1251 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1252 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1253 { 1254 return BTRFS_MAX_ITEM_SIZE(info) - 1255 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1256 } 1257 1258 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1259 { 1260 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1261 } 1262 1263 /* 1264 * Flags for mount options. 1265 * 1266 * Note: don't forget to add new options to btrfs_show_options() 1267 */ 1268 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1269 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1270 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1271 #define BTRFS_MOUNT_SSD (1 << 3) 1272 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1273 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1274 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1275 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1276 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1277 #define BTRFS_MOUNT_NOSSD (1 << 9) 1278 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1279 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1280 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1281 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1282 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1283 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1284 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1285 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1286 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1287 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1288 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1289 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1290 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1291 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1292 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1293 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1294 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1295 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1296 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1297 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1298 1299 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1300 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1301 1302 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1303 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1304 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1305 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1306 BTRFS_MOUNT_##opt) 1307 1308 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1309 do { \ 1310 if (!btrfs_test_opt(fs_info, opt)) \ 1311 btrfs_info(fs_info, fmt, ##args); \ 1312 btrfs_set_opt(fs_info->mount_opt, opt); \ 1313 } while (0) 1314 1315 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1316 do { \ 1317 if (btrfs_test_opt(fs_info, opt)) \ 1318 btrfs_info(fs_info, fmt, ##args); \ 1319 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1320 } while (0) 1321 1322 /* 1323 * Requests for changes that need to be done during transaction commit. 1324 * 1325 * Internal mount options that are used for special handling of the real 1326 * mount options (eg. cannot be set during remount and have to be set during 1327 * transaction commit) 1328 */ 1329 1330 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1331 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1332 #define BTRFS_PENDING_COMMIT (2) 1333 1334 #define btrfs_test_pending(info, opt) \ 1335 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1336 #define btrfs_set_pending(info, opt) \ 1337 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1338 #define btrfs_clear_pending(info, opt) \ 1339 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1340 1341 /* 1342 * Helpers for setting pending mount option changes. 1343 * 1344 * Expects corresponding macros 1345 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1346 */ 1347 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1348 do { \ 1349 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1350 btrfs_info((info), fmt, ##args); \ 1351 btrfs_set_pending((info), SET_##opt); \ 1352 btrfs_clear_pending((info), CLEAR_##opt); \ 1353 } \ 1354 } while(0) 1355 1356 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1357 do { \ 1358 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1359 btrfs_info((info), fmt, ##args); \ 1360 btrfs_set_pending((info), CLEAR_##opt); \ 1361 btrfs_clear_pending((info), SET_##opt); \ 1362 } \ 1363 } while(0) 1364 1365 /* 1366 * Inode flags 1367 */ 1368 #define BTRFS_INODE_NODATASUM (1 << 0) 1369 #define BTRFS_INODE_NODATACOW (1 << 1) 1370 #define BTRFS_INODE_READONLY (1 << 2) 1371 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1372 #define BTRFS_INODE_PREALLOC (1 << 4) 1373 #define BTRFS_INODE_SYNC (1 << 5) 1374 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1375 #define BTRFS_INODE_APPEND (1 << 7) 1376 #define BTRFS_INODE_NODUMP (1 << 8) 1377 #define BTRFS_INODE_NOATIME (1 << 9) 1378 #define BTRFS_INODE_DIRSYNC (1 << 10) 1379 #define BTRFS_INODE_COMPRESS (1 << 11) 1380 1381 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1382 1383 #define BTRFS_INODE_FLAG_MASK \ 1384 (BTRFS_INODE_NODATASUM | \ 1385 BTRFS_INODE_NODATACOW | \ 1386 BTRFS_INODE_READONLY | \ 1387 BTRFS_INODE_NOCOMPRESS | \ 1388 BTRFS_INODE_PREALLOC | \ 1389 BTRFS_INODE_SYNC | \ 1390 BTRFS_INODE_IMMUTABLE | \ 1391 BTRFS_INODE_APPEND | \ 1392 BTRFS_INODE_NODUMP | \ 1393 BTRFS_INODE_NOATIME | \ 1394 BTRFS_INODE_DIRSYNC | \ 1395 BTRFS_INODE_COMPRESS | \ 1396 BTRFS_INODE_ROOT_ITEM_INIT) 1397 1398 struct btrfs_map_token { 1399 struct extent_buffer *eb; 1400 char *kaddr; 1401 unsigned long offset; 1402 }; 1403 1404 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1405 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1406 1407 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1408 struct extent_buffer *eb) 1409 { 1410 token->eb = eb; 1411 token->kaddr = page_address(eb->pages[0]); 1412 token->offset = 0; 1413 } 1414 1415 /* some macros to generate set/get functions for the struct fields. This 1416 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1417 * one for u8: 1418 */ 1419 #define le8_to_cpu(v) (v) 1420 #define cpu_to_le8(v) (v) 1421 #define __le8 u8 1422 1423 static inline u8 get_unaligned_le8(const void *p) 1424 { 1425 return *(u8 *)p; 1426 } 1427 1428 static inline void put_unaligned_le8(u8 val, void *p) 1429 { 1430 *(u8 *)p = val; 1431 } 1432 1433 #define read_eb_member(eb, ptr, type, member, result) (\ 1434 read_extent_buffer(eb, (char *)(result), \ 1435 ((unsigned long)(ptr)) + \ 1436 offsetof(type, member), \ 1437 sizeof(((type *)0)->member))) 1438 1439 #define write_eb_member(eb, ptr, type, member, result) (\ 1440 write_extent_buffer(eb, (char *)(result), \ 1441 ((unsigned long)(ptr)) + \ 1442 offsetof(type, member), \ 1443 sizeof(((type *)0)->member))) 1444 1445 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1446 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1447 const void *ptr, unsigned long off); \ 1448 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1449 const void *ptr, unsigned long off, \ 1450 u##bits val); \ 1451 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1452 const void *ptr, unsigned long off); \ 1453 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1454 unsigned long off, u##bits val); 1455 1456 DECLARE_BTRFS_SETGET_BITS(8) 1457 DECLARE_BTRFS_SETGET_BITS(16) 1458 DECLARE_BTRFS_SETGET_BITS(32) 1459 DECLARE_BTRFS_SETGET_BITS(64) 1460 1461 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1462 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1463 const type *s) \ 1464 { \ 1465 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1466 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1467 } \ 1468 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1469 u##bits val) \ 1470 { \ 1471 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1472 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1473 } \ 1474 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1475 const type *s) \ 1476 { \ 1477 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1478 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1479 } \ 1480 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1481 type *s, u##bits val) \ 1482 { \ 1483 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1484 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1485 } 1486 1487 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1488 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1489 { \ 1490 const type *p = page_address(eb->pages[0]); \ 1491 return get_unaligned_le##bits(&p->member); \ 1492 } \ 1493 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1494 u##bits val) \ 1495 { \ 1496 type *p = page_address(eb->pages[0]); \ 1497 put_unaligned_le##bits(val, &p->member); \ 1498 } 1499 1500 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1501 static inline u##bits btrfs_##name(const type *s) \ 1502 { \ 1503 return get_unaligned_le##bits(&s->member); \ 1504 } \ 1505 static inline void btrfs_set_##name(type *s, u##bits val) \ 1506 { \ 1507 put_unaligned_le##bits(val, &s->member); \ 1508 } 1509 1510 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1511 struct btrfs_dev_item *s) 1512 { 1513 BUILD_BUG_ON(sizeof(u64) != 1514 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1515 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1516 total_bytes)); 1517 } 1518 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1519 struct btrfs_dev_item *s, 1520 u64 val) 1521 { 1522 BUILD_BUG_ON(sizeof(u64) != 1523 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1524 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1525 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1526 } 1527 1528 1529 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1530 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1531 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1532 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1533 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1534 start_offset, 64); 1535 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1536 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1537 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1538 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1539 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1540 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1541 1542 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1543 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1544 total_bytes, 64); 1545 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1546 bytes_used, 64); 1547 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1548 io_align, 32); 1549 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1550 io_width, 32); 1551 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1552 sector_size, 32); 1553 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1554 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1555 dev_group, 32); 1556 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1557 seek_speed, 8); 1558 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1559 bandwidth, 8); 1560 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1561 generation, 64); 1562 1563 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1564 { 1565 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1566 } 1567 1568 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1569 { 1570 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1571 } 1572 1573 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1574 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1575 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1576 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1577 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1578 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1579 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1580 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1581 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1582 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1583 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1584 1585 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1586 { 1587 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1588 } 1589 1590 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1591 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1592 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1593 stripe_len, 64); 1594 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1595 io_align, 32); 1596 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1597 io_width, 32); 1598 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1599 sector_size, 32); 1600 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1601 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1602 num_stripes, 16); 1603 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1604 sub_stripes, 16); 1605 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1606 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1607 1608 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1609 int nr) 1610 { 1611 unsigned long offset = (unsigned long)c; 1612 offset += offsetof(struct btrfs_chunk, stripe); 1613 offset += nr * sizeof(struct btrfs_stripe); 1614 return (struct btrfs_stripe *)offset; 1615 } 1616 1617 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1618 { 1619 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1620 } 1621 1622 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1623 struct btrfs_chunk *c, int nr) 1624 { 1625 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1626 } 1627 1628 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1629 struct btrfs_chunk *c, int nr) 1630 { 1631 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1632 } 1633 1634 /* struct btrfs_block_group_item */ 1635 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1636 used, 64); 1637 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1638 used, 64); 1639 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1640 struct btrfs_block_group_item, chunk_objectid, 64); 1641 1642 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1643 struct btrfs_block_group_item, chunk_objectid, 64); 1644 BTRFS_SETGET_FUNCS(block_group_flags, 1645 struct btrfs_block_group_item, flags, 64); 1646 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1647 struct btrfs_block_group_item, flags, 64); 1648 1649 /* struct btrfs_free_space_info */ 1650 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1651 extent_count, 32); 1652 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1653 1654 /* struct btrfs_inode_ref */ 1655 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1656 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1657 1658 /* struct btrfs_inode_extref */ 1659 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1660 parent_objectid, 64); 1661 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1662 name_len, 16); 1663 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1664 1665 /* struct btrfs_inode_item */ 1666 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1667 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1668 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1669 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1670 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1671 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1672 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1673 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1674 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1675 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1676 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1677 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1678 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1679 generation, 64); 1680 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1681 sequence, 64); 1682 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1683 transid, 64); 1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1685 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1686 nbytes, 64); 1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1688 block_group, 64); 1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1690 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1691 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1692 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1693 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1694 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1695 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1696 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1697 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1698 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1699 1700 /* struct btrfs_dev_extent */ 1701 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1702 chunk_tree, 64); 1703 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1704 chunk_objectid, 64); 1705 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1706 chunk_offset, 64); 1707 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1708 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1709 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1710 generation, 64); 1711 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1712 1713 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1714 1715 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1716 struct btrfs_tree_block_info *item, 1717 struct btrfs_disk_key *key) 1718 { 1719 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1720 } 1721 1722 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1723 struct btrfs_tree_block_info *item, 1724 struct btrfs_disk_key *key) 1725 { 1726 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1727 } 1728 1729 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1730 root, 64); 1731 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1732 objectid, 64); 1733 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1734 offset, 64); 1735 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1736 count, 32); 1737 1738 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1739 count, 32); 1740 1741 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1742 type, 8); 1743 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1744 offset, 64); 1745 1746 static inline u32 btrfs_extent_inline_ref_size(int type) 1747 { 1748 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1749 type == BTRFS_SHARED_BLOCK_REF_KEY) 1750 return sizeof(struct btrfs_extent_inline_ref); 1751 if (type == BTRFS_SHARED_DATA_REF_KEY) 1752 return sizeof(struct btrfs_shared_data_ref) + 1753 sizeof(struct btrfs_extent_inline_ref); 1754 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1755 return sizeof(struct btrfs_extent_data_ref) + 1756 offsetof(struct btrfs_extent_inline_ref, offset); 1757 return 0; 1758 } 1759 1760 /* struct btrfs_node */ 1761 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1762 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1763 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1764 blockptr, 64); 1765 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1766 generation, 64); 1767 1768 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1769 { 1770 unsigned long ptr; 1771 ptr = offsetof(struct btrfs_node, ptrs) + 1772 sizeof(struct btrfs_key_ptr) * nr; 1773 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1774 } 1775 1776 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1777 int nr, u64 val) 1778 { 1779 unsigned long ptr; 1780 ptr = offsetof(struct btrfs_node, ptrs) + 1781 sizeof(struct btrfs_key_ptr) * nr; 1782 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1783 } 1784 1785 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1786 { 1787 unsigned long ptr; 1788 ptr = offsetof(struct btrfs_node, ptrs) + 1789 sizeof(struct btrfs_key_ptr) * nr; 1790 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1791 } 1792 1793 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1794 int nr, u64 val) 1795 { 1796 unsigned long ptr; 1797 ptr = offsetof(struct btrfs_node, ptrs) + 1798 sizeof(struct btrfs_key_ptr) * nr; 1799 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1800 } 1801 1802 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1803 { 1804 return offsetof(struct btrfs_node, ptrs) + 1805 sizeof(struct btrfs_key_ptr) * nr; 1806 } 1807 1808 void btrfs_node_key(const struct extent_buffer *eb, 1809 struct btrfs_disk_key *disk_key, int nr); 1810 1811 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1812 struct btrfs_disk_key *disk_key, int nr) 1813 { 1814 unsigned long ptr; 1815 ptr = btrfs_node_key_ptr_offset(nr); 1816 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1817 struct btrfs_key_ptr, key, disk_key); 1818 } 1819 1820 /* struct btrfs_item */ 1821 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1822 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1823 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1824 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1825 1826 static inline unsigned long btrfs_item_nr_offset(int nr) 1827 { 1828 return offsetof(struct btrfs_leaf, items) + 1829 sizeof(struct btrfs_item) * nr; 1830 } 1831 1832 static inline struct btrfs_item *btrfs_item_nr(int nr) 1833 { 1834 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1835 } 1836 1837 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1838 struct btrfs_item *item) 1839 { 1840 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1841 } 1842 1843 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1844 { 1845 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1846 } 1847 1848 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1849 { 1850 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1851 } 1852 1853 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1854 { 1855 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1856 } 1857 1858 static inline void btrfs_item_key(const struct extent_buffer *eb, 1859 struct btrfs_disk_key *disk_key, int nr) 1860 { 1861 struct btrfs_item *item = btrfs_item_nr(nr); 1862 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1863 } 1864 1865 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1866 struct btrfs_disk_key *disk_key, int nr) 1867 { 1868 struct btrfs_item *item = btrfs_item_nr(nr); 1869 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1870 } 1871 1872 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1873 1874 /* 1875 * struct btrfs_root_ref 1876 */ 1877 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1878 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1879 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1880 1881 /* struct btrfs_dir_item */ 1882 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1883 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1884 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1885 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1886 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1887 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1888 data_len, 16); 1889 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1890 name_len, 16); 1891 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1892 transid, 64); 1893 1894 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1895 const struct btrfs_dir_item *item, 1896 struct btrfs_disk_key *key) 1897 { 1898 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1899 } 1900 1901 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1902 struct btrfs_dir_item *item, 1903 const struct btrfs_disk_key *key) 1904 { 1905 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1906 } 1907 1908 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1909 num_entries, 64); 1910 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1911 num_bitmaps, 64); 1912 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1913 generation, 64); 1914 1915 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1916 const struct btrfs_free_space_header *h, 1917 struct btrfs_disk_key *key) 1918 { 1919 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1920 } 1921 1922 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1923 struct btrfs_free_space_header *h, 1924 const struct btrfs_disk_key *key) 1925 { 1926 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1927 } 1928 1929 /* struct btrfs_disk_key */ 1930 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1931 objectid, 64); 1932 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1933 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1934 1935 #ifdef __LITTLE_ENDIAN 1936 1937 /* 1938 * Optimized helpers for little-endian architectures where CPU and on-disk 1939 * structures have the same endianness and we can skip conversions. 1940 */ 1941 1942 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 1943 const struct btrfs_disk_key *disk_key) 1944 { 1945 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 1946 } 1947 1948 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 1949 const struct btrfs_key *cpu_key) 1950 { 1951 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 1952 } 1953 1954 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1955 struct btrfs_key *cpu_key, int nr) 1956 { 1957 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1958 1959 btrfs_node_key(eb, disk_key, nr); 1960 } 1961 1962 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1963 struct btrfs_key *cpu_key, int nr) 1964 { 1965 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1966 1967 btrfs_item_key(eb, disk_key, nr); 1968 } 1969 1970 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1971 const struct btrfs_dir_item *item, 1972 struct btrfs_key *cpu_key) 1973 { 1974 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1975 1976 btrfs_dir_item_key(eb, item, disk_key); 1977 } 1978 1979 #else 1980 1981 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1982 const struct btrfs_disk_key *disk) 1983 { 1984 cpu->offset = le64_to_cpu(disk->offset); 1985 cpu->type = disk->type; 1986 cpu->objectid = le64_to_cpu(disk->objectid); 1987 } 1988 1989 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1990 const struct btrfs_key *cpu) 1991 { 1992 disk->offset = cpu_to_le64(cpu->offset); 1993 disk->type = cpu->type; 1994 disk->objectid = cpu_to_le64(cpu->objectid); 1995 } 1996 1997 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1998 struct btrfs_key *key, int nr) 1999 { 2000 struct btrfs_disk_key disk_key; 2001 btrfs_node_key(eb, &disk_key, nr); 2002 btrfs_disk_key_to_cpu(key, &disk_key); 2003 } 2004 2005 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2006 struct btrfs_key *key, int nr) 2007 { 2008 struct btrfs_disk_key disk_key; 2009 btrfs_item_key(eb, &disk_key, nr); 2010 btrfs_disk_key_to_cpu(key, &disk_key); 2011 } 2012 2013 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2014 const struct btrfs_dir_item *item, 2015 struct btrfs_key *key) 2016 { 2017 struct btrfs_disk_key disk_key; 2018 btrfs_dir_item_key(eb, item, &disk_key); 2019 btrfs_disk_key_to_cpu(key, &disk_key); 2020 } 2021 2022 #endif 2023 2024 /* struct btrfs_header */ 2025 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2026 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2027 generation, 64); 2028 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2029 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2030 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2031 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2032 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2033 generation, 64); 2034 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2035 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2036 nritems, 32); 2037 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2038 2039 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2040 { 2041 return (btrfs_header_flags(eb) & flag) == flag; 2042 } 2043 2044 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2045 { 2046 u64 flags = btrfs_header_flags(eb); 2047 btrfs_set_header_flags(eb, flags | flag); 2048 } 2049 2050 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2051 { 2052 u64 flags = btrfs_header_flags(eb); 2053 btrfs_set_header_flags(eb, flags & ~flag); 2054 } 2055 2056 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2057 { 2058 u64 flags = btrfs_header_flags(eb); 2059 return flags >> BTRFS_BACKREF_REV_SHIFT; 2060 } 2061 2062 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2063 int rev) 2064 { 2065 u64 flags = btrfs_header_flags(eb); 2066 flags &= ~BTRFS_BACKREF_REV_MASK; 2067 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2068 btrfs_set_header_flags(eb, flags); 2069 } 2070 2071 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2072 { 2073 return btrfs_header_level(eb) == 0; 2074 } 2075 2076 /* struct btrfs_root_item */ 2077 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2078 generation, 64); 2079 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2080 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2081 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2082 2083 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2084 generation, 64); 2085 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2086 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2087 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2088 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2089 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2090 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2091 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2092 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2093 last_snapshot, 64); 2094 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2095 generation_v2, 64); 2096 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2097 ctransid, 64); 2098 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2099 otransid, 64); 2100 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2101 stransid, 64); 2102 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2103 rtransid, 64); 2104 2105 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2106 { 2107 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2108 } 2109 2110 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2111 { 2112 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2113 } 2114 2115 /* struct btrfs_root_backup */ 2116 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2117 tree_root, 64); 2118 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2119 tree_root_gen, 64); 2120 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2121 tree_root_level, 8); 2122 2123 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2124 chunk_root, 64); 2125 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2126 chunk_root_gen, 64); 2127 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2128 chunk_root_level, 8); 2129 2130 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2131 extent_root, 64); 2132 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2133 extent_root_gen, 64); 2134 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2135 extent_root_level, 8); 2136 2137 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2138 fs_root, 64); 2139 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2140 fs_root_gen, 64); 2141 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2142 fs_root_level, 8); 2143 2144 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2145 dev_root, 64); 2146 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2147 dev_root_gen, 64); 2148 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2149 dev_root_level, 8); 2150 2151 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2152 csum_root, 64); 2153 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2154 csum_root_gen, 64); 2155 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2156 csum_root_level, 8); 2157 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2158 total_bytes, 64); 2159 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2160 bytes_used, 64); 2161 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2162 num_devices, 64); 2163 2164 /* struct btrfs_balance_item */ 2165 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2166 2167 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2168 const struct btrfs_balance_item *bi, 2169 struct btrfs_disk_balance_args *ba) 2170 { 2171 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2172 } 2173 2174 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2175 struct btrfs_balance_item *bi, 2176 const struct btrfs_disk_balance_args *ba) 2177 { 2178 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2179 } 2180 2181 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2182 const struct btrfs_balance_item *bi, 2183 struct btrfs_disk_balance_args *ba) 2184 { 2185 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2186 } 2187 2188 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2189 struct btrfs_balance_item *bi, 2190 const struct btrfs_disk_balance_args *ba) 2191 { 2192 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2193 } 2194 2195 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2196 const struct btrfs_balance_item *bi, 2197 struct btrfs_disk_balance_args *ba) 2198 { 2199 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2200 } 2201 2202 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2203 struct btrfs_balance_item *bi, 2204 const struct btrfs_disk_balance_args *ba) 2205 { 2206 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2207 } 2208 2209 static inline void 2210 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2211 const struct btrfs_disk_balance_args *disk) 2212 { 2213 memset(cpu, 0, sizeof(*cpu)); 2214 2215 cpu->profiles = le64_to_cpu(disk->profiles); 2216 cpu->usage = le64_to_cpu(disk->usage); 2217 cpu->devid = le64_to_cpu(disk->devid); 2218 cpu->pstart = le64_to_cpu(disk->pstart); 2219 cpu->pend = le64_to_cpu(disk->pend); 2220 cpu->vstart = le64_to_cpu(disk->vstart); 2221 cpu->vend = le64_to_cpu(disk->vend); 2222 cpu->target = le64_to_cpu(disk->target); 2223 cpu->flags = le64_to_cpu(disk->flags); 2224 cpu->limit = le64_to_cpu(disk->limit); 2225 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2226 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2227 } 2228 2229 static inline void 2230 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2231 const struct btrfs_balance_args *cpu) 2232 { 2233 memset(disk, 0, sizeof(*disk)); 2234 2235 disk->profiles = cpu_to_le64(cpu->profiles); 2236 disk->usage = cpu_to_le64(cpu->usage); 2237 disk->devid = cpu_to_le64(cpu->devid); 2238 disk->pstart = cpu_to_le64(cpu->pstart); 2239 disk->pend = cpu_to_le64(cpu->pend); 2240 disk->vstart = cpu_to_le64(cpu->vstart); 2241 disk->vend = cpu_to_le64(cpu->vend); 2242 disk->target = cpu_to_le64(cpu->target); 2243 disk->flags = cpu_to_le64(cpu->flags); 2244 disk->limit = cpu_to_le64(cpu->limit); 2245 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2246 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2247 } 2248 2249 /* struct btrfs_super_block */ 2250 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2251 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2252 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2253 generation, 64); 2254 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2255 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2256 struct btrfs_super_block, sys_chunk_array_size, 32); 2257 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2258 struct btrfs_super_block, chunk_root_generation, 64); 2259 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2260 root_level, 8); 2261 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2262 chunk_root, 64); 2263 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2264 chunk_root_level, 8); 2265 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2266 log_root, 64); 2267 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2268 log_root_transid, 64); 2269 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2270 log_root_level, 8); 2271 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2272 total_bytes, 64); 2273 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2274 bytes_used, 64); 2275 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2276 sectorsize, 32); 2277 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2278 nodesize, 32); 2279 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2280 stripesize, 32); 2281 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2282 root_dir_objectid, 64); 2283 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2284 num_devices, 64); 2285 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2286 compat_flags, 64); 2287 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2288 compat_ro_flags, 64); 2289 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2290 incompat_flags, 64); 2291 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2292 csum_type, 16); 2293 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2294 cache_generation, 64); 2295 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2296 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2297 uuid_tree_generation, 64); 2298 2299 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2300 const char *btrfs_super_csum_name(u16 csum_type); 2301 const char *btrfs_super_csum_driver(u16 csum_type); 2302 size_t __attribute_const__ btrfs_get_num_csums(void); 2303 2304 2305 /* 2306 * The leaf data grows from end-to-front in the node. 2307 * this returns the address of the start of the last item, 2308 * which is the stop of the leaf data stack 2309 */ 2310 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2311 { 2312 u32 nr = btrfs_header_nritems(leaf); 2313 2314 if (nr == 0) 2315 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2316 return btrfs_item_offset_nr(leaf, nr - 1); 2317 } 2318 2319 /* struct btrfs_file_extent_item */ 2320 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2321 type, 8); 2322 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2323 struct btrfs_file_extent_item, disk_bytenr, 64); 2324 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2325 struct btrfs_file_extent_item, offset, 64); 2326 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2327 struct btrfs_file_extent_item, generation, 64); 2328 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2329 struct btrfs_file_extent_item, num_bytes, 64); 2330 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2331 struct btrfs_file_extent_item, ram_bytes, 64); 2332 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2333 struct btrfs_file_extent_item, disk_num_bytes, 64); 2334 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2335 struct btrfs_file_extent_item, compression, 8); 2336 2337 static inline unsigned long 2338 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2339 { 2340 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2341 } 2342 2343 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2344 { 2345 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2346 } 2347 2348 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2349 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2350 disk_bytenr, 64); 2351 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2352 generation, 64); 2353 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2354 disk_num_bytes, 64); 2355 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2356 offset, 64); 2357 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2358 num_bytes, 64); 2359 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2360 ram_bytes, 64); 2361 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2362 compression, 8); 2363 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2364 encryption, 8); 2365 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2366 other_encoding, 16); 2367 2368 /* 2369 * this returns the number of bytes used by the item on disk, minus the 2370 * size of any extent headers. If a file is compressed on disk, this is 2371 * the compressed size 2372 */ 2373 static inline u32 btrfs_file_extent_inline_item_len( 2374 const struct extent_buffer *eb, 2375 struct btrfs_item *e) 2376 { 2377 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2378 } 2379 2380 /* btrfs_qgroup_status_item */ 2381 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2382 generation, 64); 2383 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2384 version, 64); 2385 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2386 flags, 64); 2387 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2388 rescan, 64); 2389 2390 /* btrfs_qgroup_info_item */ 2391 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2392 generation, 64); 2393 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2394 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2395 rfer_cmpr, 64); 2396 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2397 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2398 excl_cmpr, 64); 2399 2400 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2401 struct btrfs_qgroup_info_item, generation, 64); 2402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2403 rfer, 64); 2404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2405 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2406 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2407 excl, 64); 2408 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2409 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2410 2411 /* btrfs_qgroup_limit_item */ 2412 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2413 flags, 64); 2414 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2415 max_rfer, 64); 2416 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2417 max_excl, 64); 2418 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2419 rsv_rfer, 64); 2420 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2421 rsv_excl, 64); 2422 2423 /* btrfs_dev_replace_item */ 2424 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2425 struct btrfs_dev_replace_item, src_devid, 64); 2426 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2427 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2428 64); 2429 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2430 replace_state, 64); 2431 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2432 time_started, 64); 2433 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2434 time_stopped, 64); 2435 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2436 num_write_errors, 64); 2437 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2438 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2439 64); 2440 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2441 cursor_left, 64); 2442 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2443 cursor_right, 64); 2444 2445 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2446 struct btrfs_dev_replace_item, src_devid, 64); 2447 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2448 struct btrfs_dev_replace_item, 2449 cont_reading_from_srcdev_mode, 64); 2450 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2451 struct btrfs_dev_replace_item, replace_state, 64); 2452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2453 struct btrfs_dev_replace_item, time_started, 64); 2454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2455 struct btrfs_dev_replace_item, time_stopped, 64); 2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2457 struct btrfs_dev_replace_item, num_write_errors, 64); 2458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2459 struct btrfs_dev_replace_item, 2460 num_uncorrectable_read_errors, 64); 2461 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2462 struct btrfs_dev_replace_item, cursor_left, 64); 2463 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2464 struct btrfs_dev_replace_item, cursor_right, 64); 2465 2466 /* helper function to cast into the data area of the leaf. */ 2467 #define btrfs_item_ptr(leaf, slot, type) \ 2468 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2469 btrfs_item_offset_nr(leaf, slot))) 2470 2471 #define btrfs_item_ptr_offset(leaf, slot) \ 2472 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2473 btrfs_item_offset_nr(leaf, slot))) 2474 2475 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2476 { 2477 return crc32c(crc, address, length); 2478 } 2479 2480 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2481 { 2482 put_unaligned_le32(~crc, result); 2483 } 2484 2485 static inline u64 btrfs_name_hash(const char *name, int len) 2486 { 2487 return crc32c((u32)~1, name, len); 2488 } 2489 2490 /* 2491 * Figure the key offset of an extended inode ref 2492 */ 2493 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2494 int len) 2495 { 2496 return (u64) crc32c(parent_objectid, name, len); 2497 } 2498 2499 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2500 { 2501 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2502 } 2503 2504 /* extent-tree.c */ 2505 2506 enum btrfs_inline_ref_type { 2507 BTRFS_REF_TYPE_INVALID, 2508 BTRFS_REF_TYPE_BLOCK, 2509 BTRFS_REF_TYPE_DATA, 2510 BTRFS_REF_TYPE_ANY, 2511 }; 2512 2513 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2514 struct btrfs_extent_inline_ref *iref, 2515 enum btrfs_inline_ref_type is_data); 2516 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2517 2518 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2519 2520 /* 2521 * Use this if we would be adding new items, as we could split nodes as we cow 2522 * down the tree. 2523 */ 2524 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2525 unsigned num_items) 2526 { 2527 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2528 } 2529 2530 /* 2531 * Doing a truncate or a modification won't result in new nodes or leaves, just 2532 * what we need for COW. 2533 */ 2534 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2535 unsigned num_items) 2536 { 2537 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2538 } 2539 2540 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2541 u64 start, u64 num_bytes); 2542 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2543 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2544 unsigned long count); 2545 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2546 struct btrfs_delayed_ref_root *delayed_refs, 2547 struct btrfs_delayed_ref_head *head); 2548 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2549 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2550 struct btrfs_fs_info *fs_info, u64 bytenr, 2551 u64 offset, int metadata, u64 *refs, u64 *flags); 2552 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2553 int reserved); 2554 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2555 u64 bytenr, u64 num_bytes); 2556 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2557 int btrfs_cross_ref_exist(struct btrfs_root *root, 2558 u64 objectid, u64 offset, u64 bytenr, bool strict); 2559 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2560 struct btrfs_root *root, 2561 u64 parent, u64 root_objectid, 2562 const struct btrfs_disk_key *key, 2563 int level, u64 hint, 2564 u64 empty_size, 2565 enum btrfs_lock_nesting nest); 2566 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2567 struct btrfs_root *root, 2568 struct extent_buffer *buf, 2569 u64 parent, int last_ref); 2570 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2571 struct btrfs_root *root, u64 owner, 2572 u64 offset, u64 ram_bytes, 2573 struct btrfs_key *ins); 2574 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2575 u64 root_objectid, u64 owner, u64 offset, 2576 struct btrfs_key *ins); 2577 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2578 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2579 struct btrfs_key *ins, int is_data, int delalloc); 2580 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2581 struct extent_buffer *buf, int full_backref); 2582 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2583 struct extent_buffer *buf, int full_backref); 2584 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2585 struct extent_buffer *eb, u64 flags, 2586 int level, int is_data); 2587 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2588 2589 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2590 u64 start, u64 len, int delalloc); 2591 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2592 u64 len); 2593 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2594 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2595 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2596 struct btrfs_ref *generic_ref); 2597 2598 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2599 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2600 2601 /* 2602 * Different levels for to flush space when doing space reservations. 2603 * 2604 * The higher the level, the more methods we try to reclaim space. 2605 */ 2606 enum btrfs_reserve_flush_enum { 2607 /* If we are in the transaction, we can't flush anything.*/ 2608 BTRFS_RESERVE_NO_FLUSH, 2609 2610 /* 2611 * Flush space by: 2612 * - Running delayed inode items 2613 * - Allocating a new chunk 2614 */ 2615 BTRFS_RESERVE_FLUSH_LIMIT, 2616 2617 /* 2618 * Flush space by: 2619 * - Running delayed inode items 2620 * - Running delayed refs 2621 * - Running delalloc and waiting for ordered extents 2622 * - Allocating a new chunk 2623 */ 2624 BTRFS_RESERVE_FLUSH_EVICT, 2625 2626 /* 2627 * Flush space by above mentioned methods and by: 2628 * - Running delayed iputs 2629 * - Commiting transaction 2630 * 2631 * Can be interruped by fatal signal. 2632 */ 2633 BTRFS_RESERVE_FLUSH_DATA, 2634 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2635 BTRFS_RESERVE_FLUSH_ALL, 2636 2637 /* 2638 * Pretty much the same as FLUSH_ALL, but can also steal space from 2639 * global rsv. 2640 * 2641 * Can be interruped by fatal signal. 2642 */ 2643 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2644 }; 2645 2646 enum btrfs_flush_state { 2647 FLUSH_DELAYED_ITEMS_NR = 1, 2648 FLUSH_DELAYED_ITEMS = 2, 2649 FLUSH_DELAYED_REFS_NR = 3, 2650 FLUSH_DELAYED_REFS = 4, 2651 FLUSH_DELALLOC = 5, 2652 FLUSH_DELALLOC_WAIT = 6, 2653 ALLOC_CHUNK = 7, 2654 ALLOC_CHUNK_FORCE = 8, 2655 RUN_DELAYED_IPUTS = 9, 2656 COMMIT_TRANS = 10, 2657 }; 2658 2659 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2660 struct btrfs_block_rsv *rsv, 2661 int nitems, bool use_global_rsv); 2662 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2663 struct btrfs_block_rsv *rsv); 2664 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2665 2666 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2667 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2668 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2669 u64 start, u64 end); 2670 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2671 u64 num_bytes, u64 *actual_bytes); 2672 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2673 2674 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2675 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2676 struct btrfs_fs_info *fs_info); 2677 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2678 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2679 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2680 2681 /* ctree.c */ 2682 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2683 int *slot); 2684 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2685 int btrfs_previous_item(struct btrfs_root *root, 2686 struct btrfs_path *path, u64 min_objectid, 2687 int type); 2688 int btrfs_previous_extent_item(struct btrfs_root *root, 2689 struct btrfs_path *path, u64 min_objectid); 2690 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2691 struct btrfs_path *path, 2692 const struct btrfs_key *new_key); 2693 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2694 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2695 struct btrfs_key *key, int lowest_level, 2696 u64 min_trans); 2697 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2698 struct btrfs_path *path, 2699 u64 min_trans); 2700 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2701 int slot); 2702 2703 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2704 struct btrfs_root *root, struct extent_buffer *buf, 2705 struct extent_buffer *parent, int parent_slot, 2706 struct extent_buffer **cow_ret, 2707 enum btrfs_lock_nesting nest); 2708 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2709 struct btrfs_root *root, 2710 struct extent_buffer *buf, 2711 struct extent_buffer **cow_ret, u64 new_root_objectid); 2712 int btrfs_block_can_be_shared(struct btrfs_root *root, 2713 struct extent_buffer *buf); 2714 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2715 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2716 int btrfs_split_item(struct btrfs_trans_handle *trans, 2717 struct btrfs_root *root, 2718 struct btrfs_path *path, 2719 const struct btrfs_key *new_key, 2720 unsigned long split_offset); 2721 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2722 struct btrfs_root *root, 2723 struct btrfs_path *path, 2724 const struct btrfs_key *new_key); 2725 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2726 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2727 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2728 const struct btrfs_key *key, struct btrfs_path *p, 2729 int ins_len, int cow); 2730 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2731 struct btrfs_path *p, u64 time_seq); 2732 int btrfs_search_slot_for_read(struct btrfs_root *root, 2733 const struct btrfs_key *key, 2734 struct btrfs_path *p, int find_higher, 2735 int return_any); 2736 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2737 struct btrfs_root *root, struct extent_buffer *parent, 2738 int start_slot, u64 *last_ret, 2739 struct btrfs_key *progress); 2740 void btrfs_release_path(struct btrfs_path *p); 2741 struct btrfs_path *btrfs_alloc_path(void); 2742 void btrfs_free_path(struct btrfs_path *p); 2743 2744 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2745 struct btrfs_path *path, int slot, int nr); 2746 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2747 struct btrfs_root *root, 2748 struct btrfs_path *path) 2749 { 2750 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2751 } 2752 2753 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2754 const struct btrfs_key *cpu_key, u32 *data_size, 2755 int nr); 2756 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2757 const struct btrfs_key *key, void *data, u32 data_size); 2758 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2759 struct btrfs_root *root, 2760 struct btrfs_path *path, 2761 const struct btrfs_key *cpu_key, u32 *data_size, 2762 int nr); 2763 2764 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2765 struct btrfs_root *root, 2766 struct btrfs_path *path, 2767 const struct btrfs_key *key, 2768 u32 data_size) 2769 { 2770 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2771 } 2772 2773 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2774 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2775 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2776 u64 time_seq); 2777 static inline int btrfs_next_old_item(struct btrfs_root *root, 2778 struct btrfs_path *p, u64 time_seq) 2779 { 2780 ++p->slots[0]; 2781 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2782 return btrfs_next_old_leaf(root, p, time_seq); 2783 return 0; 2784 } 2785 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2786 { 2787 return btrfs_next_old_item(root, p, 0); 2788 } 2789 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2790 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2791 int for_reloc); 2792 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2793 struct btrfs_root *root, 2794 struct extent_buffer *node, 2795 struct extent_buffer *parent); 2796 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2797 { 2798 /* 2799 * Do it this way so we only ever do one test_bit in the normal case. 2800 */ 2801 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2802 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2803 return 2; 2804 return 1; 2805 } 2806 return 0; 2807 } 2808 2809 /* 2810 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2811 * anything except sleeping. This function is used to check the status of 2812 * the fs. 2813 */ 2814 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2815 { 2816 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2817 } 2818 2819 /* tree mod log functions from ctree.c */ 2820 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2821 struct seq_list *elem); 2822 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2823 struct seq_list *elem); 2824 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2825 2826 /* root-item.c */ 2827 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2828 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2829 int name_len); 2830 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2831 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2832 int name_len); 2833 int btrfs_del_root(struct btrfs_trans_handle *trans, 2834 const struct btrfs_key *key); 2835 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2836 const struct btrfs_key *key, 2837 struct btrfs_root_item *item); 2838 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2839 struct btrfs_root *root, 2840 struct btrfs_key *key, 2841 struct btrfs_root_item *item); 2842 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2843 struct btrfs_path *path, struct btrfs_root_item *root_item, 2844 struct btrfs_key *root_key); 2845 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2846 void btrfs_set_root_node(struct btrfs_root_item *item, 2847 struct extent_buffer *node); 2848 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2849 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2850 struct btrfs_root *root); 2851 2852 /* uuid-tree.c */ 2853 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2854 u64 subid); 2855 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2856 u64 subid); 2857 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2858 2859 /* dir-item.c */ 2860 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2861 const char *name, int name_len); 2862 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2863 int name_len, struct btrfs_inode *dir, 2864 struct btrfs_key *location, u8 type, u64 index); 2865 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2866 struct btrfs_root *root, 2867 struct btrfs_path *path, u64 dir, 2868 const char *name, int name_len, 2869 int mod); 2870 struct btrfs_dir_item * 2871 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2872 struct btrfs_root *root, 2873 struct btrfs_path *path, u64 dir, 2874 u64 objectid, const char *name, int name_len, 2875 int mod); 2876 struct btrfs_dir_item * 2877 btrfs_search_dir_index_item(struct btrfs_root *root, 2878 struct btrfs_path *path, u64 dirid, 2879 const char *name, int name_len); 2880 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2881 struct btrfs_root *root, 2882 struct btrfs_path *path, 2883 struct btrfs_dir_item *di); 2884 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2885 struct btrfs_root *root, 2886 struct btrfs_path *path, u64 objectid, 2887 const char *name, u16 name_len, 2888 const void *data, u16 data_len); 2889 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2890 struct btrfs_root *root, 2891 struct btrfs_path *path, u64 dir, 2892 const char *name, u16 name_len, 2893 int mod); 2894 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2895 struct btrfs_path *path, 2896 const char *name, 2897 int name_len); 2898 2899 /* orphan.c */ 2900 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2901 struct btrfs_root *root, u64 offset); 2902 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2903 struct btrfs_root *root, u64 offset); 2904 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2905 2906 /* inode-item.c */ 2907 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2908 struct btrfs_root *root, 2909 const char *name, int name_len, 2910 u64 inode_objectid, u64 ref_objectid, u64 index); 2911 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2912 struct btrfs_root *root, 2913 const char *name, int name_len, 2914 u64 inode_objectid, u64 ref_objectid, u64 *index); 2915 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2916 struct btrfs_root *root, 2917 struct btrfs_path *path, u64 objectid); 2918 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2919 *root, struct btrfs_path *path, 2920 struct btrfs_key *location, int mod); 2921 2922 struct btrfs_inode_extref * 2923 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2924 struct btrfs_root *root, 2925 struct btrfs_path *path, 2926 const char *name, int name_len, 2927 u64 inode_objectid, u64 ref_objectid, int ins_len, 2928 int cow); 2929 2930 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2931 int slot, const char *name, 2932 int name_len); 2933 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2934 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2935 const char *name, int name_len); 2936 /* file-item.c */ 2937 struct btrfs_dio_private; 2938 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2939 struct btrfs_root *root, u64 bytenr, u64 len); 2940 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2941 u64 offset, u8 *dst); 2942 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2943 struct btrfs_root *root, 2944 u64 objectid, u64 pos, 2945 u64 disk_offset, u64 disk_num_bytes, 2946 u64 num_bytes, u64 offset, u64 ram_bytes, 2947 u8 compression, u8 encryption, u16 other_encoding); 2948 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2949 struct btrfs_root *root, 2950 struct btrfs_path *path, u64 objectid, 2951 u64 bytenr, int mod); 2952 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2953 struct btrfs_root *root, 2954 struct btrfs_ordered_sum *sums); 2955 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 2956 u64 file_start, int contig); 2957 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2958 struct list_head *list, int search_commit); 2959 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2960 const struct btrfs_path *path, 2961 struct btrfs_file_extent_item *fi, 2962 const bool new_inline, 2963 struct extent_map *em); 2964 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 2965 u64 len); 2966 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 2967 u64 len); 2968 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size); 2969 u64 btrfs_file_extent_end(const struct btrfs_path *path); 2970 2971 /* inode.c */ 2972 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 2973 int mirror_num, unsigned long bio_flags); 2974 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u64 phy_offset, 2975 struct page *page, u64 start, u64 end, int mirror); 2976 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2977 u64 start, u64 len); 2978 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2979 u64 *orig_start, u64 *orig_block_len, 2980 u64 *ram_bytes, bool strict); 2981 2982 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2983 struct btrfs_inode *inode); 2984 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2985 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2986 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2987 struct btrfs_root *root, 2988 struct btrfs_inode *dir, struct btrfs_inode *inode, 2989 const char *name, int name_len); 2990 int btrfs_add_link(struct btrfs_trans_handle *trans, 2991 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2992 const char *name, int name_len, int add_backref, u64 index); 2993 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2994 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2995 int front); 2996 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2997 struct btrfs_root *root, 2998 struct inode *inode, u64 new_size, 2999 u32 min_type); 3000 3001 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3002 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr); 3003 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3004 unsigned int extra_bits, 3005 struct extent_state **cached_state); 3006 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3007 struct btrfs_root *new_root, 3008 struct btrfs_root *parent_root, 3009 u64 new_dirid); 3010 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3011 unsigned *bits); 3012 void btrfs_clear_delalloc_extent(struct inode *inode, 3013 struct extent_state *state, unsigned *bits); 3014 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3015 struct extent_state *other); 3016 void btrfs_split_delalloc_extent(struct inode *inode, 3017 struct extent_state *orig, u64 split); 3018 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3019 unsigned long bio_flags); 3020 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3021 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3022 int btrfs_readpage(struct file *file, struct page *page); 3023 void btrfs_evict_inode(struct inode *inode); 3024 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3025 struct inode *btrfs_alloc_inode(struct super_block *sb); 3026 void btrfs_destroy_inode(struct inode *inode); 3027 void btrfs_free_inode(struct inode *inode); 3028 int btrfs_drop_inode(struct inode *inode); 3029 int __init btrfs_init_cachep(void); 3030 void __cold btrfs_destroy_cachep(void); 3031 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3032 struct btrfs_root *root, struct btrfs_path *path); 3033 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3034 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3035 struct page *page, size_t pg_offset, 3036 u64 start, u64 end); 3037 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3038 struct btrfs_root *root, 3039 struct inode *inode); 3040 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3041 struct btrfs_root *root, struct inode *inode); 3042 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3043 struct btrfs_inode *inode); 3044 int btrfs_orphan_cleanup(struct btrfs_root *root); 3045 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3046 void btrfs_add_delayed_iput(struct inode *inode); 3047 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3048 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3049 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3050 u64 start, u64 num_bytes, u64 min_size, 3051 loff_t actual_len, u64 *alloc_hint); 3052 int btrfs_prealloc_file_range_trans(struct inode *inode, 3053 struct btrfs_trans_handle *trans, int mode, 3054 u64 start, u64 num_bytes, u64 min_size, 3055 loff_t actual_len, u64 *alloc_hint); 3056 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3057 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3058 struct writeback_control *wbc); 3059 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3060 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3061 u64 end, int uptodate); 3062 extern const struct dentry_operations btrfs_dentry_operations; 3063 ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter); 3064 3065 /* ioctl.c */ 3066 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3067 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3068 int btrfs_ioctl_get_supported_features(void __user *arg); 3069 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3070 int __pure btrfs_is_empty_uuid(u8 *uuid); 3071 int btrfs_defrag_file(struct inode *inode, struct file *file, 3072 struct btrfs_ioctl_defrag_range_args *range, 3073 u64 newer_than, unsigned long max_pages); 3074 void btrfs_get_block_group_info(struct list_head *groups_list, 3075 struct btrfs_ioctl_space_info *space); 3076 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3077 struct btrfs_ioctl_balance_args *bargs); 3078 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3079 enum btrfs_exclusive_operation type); 3080 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3081 3082 /* file.c */ 3083 int __init btrfs_auto_defrag_init(void); 3084 void __cold btrfs_auto_defrag_exit(void); 3085 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3086 struct btrfs_inode *inode); 3087 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3088 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3089 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3090 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3091 int skip_pinned); 3092 extern const struct file_operations btrfs_file_operations; 3093 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3094 struct btrfs_root *root, struct btrfs_inode *inode, 3095 struct btrfs_path *path, u64 start, u64 end, 3096 u64 *drop_end, int drop_cache, 3097 int replace_extent, 3098 u32 extent_item_size, 3099 int *key_inserted); 3100 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3101 struct btrfs_root *root, struct inode *inode, u64 start, 3102 u64 end, int drop_cache); 3103 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path, 3104 const u64 start, const u64 end, 3105 struct btrfs_replace_extent_info *extent_info, 3106 struct btrfs_trans_handle **trans_out); 3107 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3108 struct btrfs_inode *inode, u64 start, u64 end); 3109 int btrfs_release_file(struct inode *inode, struct file *file); 3110 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3111 size_t num_pages, loff_t pos, size_t write_bytes, 3112 struct extent_state **cached); 3113 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3114 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3115 size_t *write_bytes); 3116 void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3117 3118 /* tree-defrag.c */ 3119 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3120 struct btrfs_root *root); 3121 3122 /* super.c */ 3123 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3124 unsigned long new_flags); 3125 int btrfs_sync_fs(struct super_block *sb, int wait); 3126 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3127 u64 subvol_objectid); 3128 3129 static inline __printf(2, 3) __cold 3130 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3131 { 3132 } 3133 3134 #ifdef CONFIG_PRINTK 3135 __printf(2, 3) 3136 __cold 3137 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3138 #else 3139 #define btrfs_printk(fs_info, fmt, args...) \ 3140 btrfs_no_printk(fs_info, fmt, ##args) 3141 #endif 3142 3143 #define btrfs_emerg(fs_info, fmt, args...) \ 3144 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3145 #define btrfs_alert(fs_info, fmt, args...) \ 3146 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3147 #define btrfs_crit(fs_info, fmt, args...) \ 3148 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3149 #define btrfs_err(fs_info, fmt, args...) \ 3150 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3151 #define btrfs_warn(fs_info, fmt, args...) \ 3152 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3153 #define btrfs_notice(fs_info, fmt, args...) \ 3154 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3155 #define btrfs_info(fs_info, fmt, args...) \ 3156 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3157 3158 /* 3159 * Wrappers that use printk_in_rcu 3160 */ 3161 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3162 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3163 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3164 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3165 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3166 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3167 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3168 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3169 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3170 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3171 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3172 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3173 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3174 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3175 3176 /* 3177 * Wrappers that use a ratelimited printk_in_rcu 3178 */ 3179 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3180 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3181 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3182 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3183 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3184 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3185 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3186 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3187 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3188 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3189 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3190 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3191 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3192 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3193 3194 /* 3195 * Wrappers that use a ratelimited printk 3196 */ 3197 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3198 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3199 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3200 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3201 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3202 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3203 #define btrfs_err_rl(fs_info, fmt, args...) \ 3204 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3205 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3206 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3207 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3208 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3209 #define btrfs_info_rl(fs_info, fmt, args...) \ 3210 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3211 3212 #if defined(CONFIG_DYNAMIC_DEBUG) 3213 #define btrfs_debug(fs_info, fmt, args...) \ 3214 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3215 fs_info, KERN_DEBUG fmt, ##args) 3216 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3217 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3218 fs_info, KERN_DEBUG fmt, ##args) 3219 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3220 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3221 fs_info, KERN_DEBUG fmt, ##args) 3222 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3223 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3224 fs_info, KERN_DEBUG fmt, ##args) 3225 #elif defined(DEBUG) 3226 #define btrfs_debug(fs_info, fmt, args...) \ 3227 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3228 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3229 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3230 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3231 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3232 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3233 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3234 #else 3235 #define btrfs_debug(fs_info, fmt, args...) \ 3236 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3237 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3238 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3239 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3240 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3241 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3242 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3243 #endif 3244 3245 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3246 do { \ 3247 rcu_read_lock(); \ 3248 btrfs_printk(fs_info, fmt, ##args); \ 3249 rcu_read_unlock(); \ 3250 } while (0) 3251 3252 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3253 do { \ 3254 rcu_read_lock(); \ 3255 btrfs_no_printk(fs_info, fmt, ##args); \ 3256 rcu_read_unlock(); \ 3257 } while (0) 3258 3259 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3260 do { \ 3261 static DEFINE_RATELIMIT_STATE(_rs, \ 3262 DEFAULT_RATELIMIT_INTERVAL, \ 3263 DEFAULT_RATELIMIT_BURST); \ 3264 if (__ratelimit(&_rs)) \ 3265 btrfs_printk(fs_info, fmt, ##args); \ 3266 } while (0) 3267 3268 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3269 do { \ 3270 rcu_read_lock(); \ 3271 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3272 rcu_read_unlock(); \ 3273 } while (0) 3274 3275 #ifdef CONFIG_BTRFS_ASSERT 3276 __cold __noreturn 3277 static inline void assertfail(const char *expr, const char *file, int line) 3278 { 3279 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3280 BUG(); 3281 } 3282 3283 #define ASSERT(expr) \ 3284 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3285 3286 #else 3287 static inline void assertfail(const char *expr, const char* file, int line) { } 3288 #define ASSERT(expr) (void)(expr) 3289 #endif 3290 3291 /* 3292 * Use that for functions that are conditionally exported for sanity tests but 3293 * otherwise static 3294 */ 3295 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3296 #define EXPORT_FOR_TESTS static 3297 #else 3298 #define EXPORT_FOR_TESTS 3299 #endif 3300 3301 __cold 3302 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3303 { 3304 btrfs_err(fs_info, 3305 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3306 } 3307 3308 __printf(5, 6) 3309 __cold 3310 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3311 unsigned int line, int errno, const char *fmt, ...); 3312 3313 const char * __attribute_const__ btrfs_decode_error(int errno); 3314 3315 __cold 3316 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3317 const char *function, 3318 unsigned int line, int errno); 3319 3320 /* 3321 * Call btrfs_abort_transaction as early as possible when an error condition is 3322 * detected, that way the exact line number is reported. 3323 */ 3324 #define btrfs_abort_transaction(trans, errno) \ 3325 do { \ 3326 /* Report first abort since mount */ \ 3327 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3328 &((trans)->fs_info->fs_state))) { \ 3329 if ((errno) != -EIO && (errno) != -EROFS) { \ 3330 WARN(1, KERN_DEBUG \ 3331 "BTRFS: Transaction aborted (error %d)\n", \ 3332 (errno)); \ 3333 } else { \ 3334 btrfs_debug((trans)->fs_info, \ 3335 "Transaction aborted (error %d)", \ 3336 (errno)); \ 3337 } \ 3338 } \ 3339 __btrfs_abort_transaction((trans), __func__, \ 3340 __LINE__, (errno)); \ 3341 } while (0) 3342 3343 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3344 do { \ 3345 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3346 (errno), fmt, ##args); \ 3347 } while (0) 3348 3349 __printf(5, 6) 3350 __cold 3351 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3352 unsigned int line, int errno, const char *fmt, ...); 3353 /* 3354 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3355 * will panic(). Otherwise we BUG() here. 3356 */ 3357 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3358 do { \ 3359 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3360 BUG(); \ 3361 } while (0) 3362 3363 3364 /* compatibility and incompatibility defines */ 3365 3366 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3367 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3368 #opt) 3369 3370 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3371 u64 flag, const char* name) 3372 { 3373 struct btrfs_super_block *disk_super; 3374 u64 features; 3375 3376 disk_super = fs_info->super_copy; 3377 features = btrfs_super_incompat_flags(disk_super); 3378 if (!(features & flag)) { 3379 spin_lock(&fs_info->super_lock); 3380 features = btrfs_super_incompat_flags(disk_super); 3381 if (!(features & flag)) { 3382 features |= flag; 3383 btrfs_set_super_incompat_flags(disk_super, features); 3384 btrfs_info(fs_info, 3385 "setting incompat feature flag for %s (0x%llx)", 3386 name, flag); 3387 } 3388 spin_unlock(&fs_info->super_lock); 3389 } 3390 } 3391 3392 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3393 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3394 #opt) 3395 3396 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3397 u64 flag, const char* name) 3398 { 3399 struct btrfs_super_block *disk_super; 3400 u64 features; 3401 3402 disk_super = fs_info->super_copy; 3403 features = btrfs_super_incompat_flags(disk_super); 3404 if (features & flag) { 3405 spin_lock(&fs_info->super_lock); 3406 features = btrfs_super_incompat_flags(disk_super); 3407 if (features & flag) { 3408 features &= ~flag; 3409 btrfs_set_super_incompat_flags(disk_super, features); 3410 btrfs_info(fs_info, 3411 "clearing incompat feature flag for %s (0x%llx)", 3412 name, flag); 3413 } 3414 spin_unlock(&fs_info->super_lock); 3415 } 3416 } 3417 3418 #define btrfs_fs_incompat(fs_info, opt) \ 3419 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3420 3421 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3422 { 3423 struct btrfs_super_block *disk_super; 3424 disk_super = fs_info->super_copy; 3425 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3426 } 3427 3428 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3429 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3430 #opt) 3431 3432 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3433 u64 flag, const char *name) 3434 { 3435 struct btrfs_super_block *disk_super; 3436 u64 features; 3437 3438 disk_super = fs_info->super_copy; 3439 features = btrfs_super_compat_ro_flags(disk_super); 3440 if (!(features & flag)) { 3441 spin_lock(&fs_info->super_lock); 3442 features = btrfs_super_compat_ro_flags(disk_super); 3443 if (!(features & flag)) { 3444 features |= flag; 3445 btrfs_set_super_compat_ro_flags(disk_super, features); 3446 btrfs_info(fs_info, 3447 "setting compat-ro feature flag for %s (0x%llx)", 3448 name, flag); 3449 } 3450 spin_unlock(&fs_info->super_lock); 3451 } 3452 } 3453 3454 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3455 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3456 #opt) 3457 3458 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3459 u64 flag, const char *name) 3460 { 3461 struct btrfs_super_block *disk_super; 3462 u64 features; 3463 3464 disk_super = fs_info->super_copy; 3465 features = btrfs_super_compat_ro_flags(disk_super); 3466 if (features & flag) { 3467 spin_lock(&fs_info->super_lock); 3468 features = btrfs_super_compat_ro_flags(disk_super); 3469 if (features & flag) { 3470 features &= ~flag; 3471 btrfs_set_super_compat_ro_flags(disk_super, features); 3472 btrfs_info(fs_info, 3473 "clearing compat-ro feature flag for %s (0x%llx)", 3474 name, flag); 3475 } 3476 spin_unlock(&fs_info->super_lock); 3477 } 3478 } 3479 3480 #define btrfs_fs_compat_ro(fs_info, opt) \ 3481 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3482 3483 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3484 { 3485 struct btrfs_super_block *disk_super; 3486 disk_super = fs_info->super_copy; 3487 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3488 } 3489 3490 /* acl.c */ 3491 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3492 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3493 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3494 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3495 struct inode *inode, struct inode *dir); 3496 #else 3497 #define btrfs_get_acl NULL 3498 #define btrfs_set_acl NULL 3499 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3500 struct inode *inode, struct inode *dir) 3501 { 3502 return 0; 3503 } 3504 #endif 3505 3506 /* relocation.c */ 3507 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3508 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3509 struct btrfs_root *root); 3510 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3511 struct btrfs_root *root); 3512 int btrfs_recover_relocation(struct btrfs_root *root); 3513 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3514 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3515 struct btrfs_root *root, struct extent_buffer *buf, 3516 struct extent_buffer *cow); 3517 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3518 u64 *bytes_to_reserve); 3519 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3520 struct btrfs_pending_snapshot *pending); 3521 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3522 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3523 u64 bytenr); 3524 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3525 3526 /* scrub.c */ 3527 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3528 u64 end, struct btrfs_scrub_progress *progress, 3529 int readonly, int is_dev_replace); 3530 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3531 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3532 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3533 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3534 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3535 struct btrfs_scrub_progress *progress); 3536 static inline void btrfs_init_full_stripe_locks_tree( 3537 struct btrfs_full_stripe_locks_tree *locks_root) 3538 { 3539 locks_root->root = RB_ROOT; 3540 mutex_init(&locks_root->lock); 3541 } 3542 3543 /* dev-replace.c */ 3544 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3545 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3546 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3547 3548 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3549 { 3550 btrfs_bio_counter_sub(fs_info, 1); 3551 } 3552 3553 /* reada.c */ 3554 struct reada_control { 3555 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3556 struct btrfs_key key_start; 3557 struct btrfs_key key_end; /* exclusive */ 3558 atomic_t elems; 3559 struct kref refcnt; 3560 wait_queue_head_t wait; 3561 }; 3562 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3563 struct btrfs_key *start, struct btrfs_key *end); 3564 int btrfs_reada_wait(void *handle); 3565 void btrfs_reada_detach(void *handle); 3566 int btree_readahead_hook(struct extent_buffer *eb, int err); 3567 void btrfs_reada_remove_dev(struct btrfs_device *dev); 3568 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3569 3570 static inline int is_fstree(u64 rootid) 3571 { 3572 if (rootid == BTRFS_FS_TREE_OBJECTID || 3573 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3574 !btrfs_qgroup_level(rootid))) 3575 return 1; 3576 return 0; 3577 } 3578 3579 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3580 { 3581 return signal_pending(current); 3582 } 3583 3584 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3585 3586 /* Sanity test specific functions */ 3587 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3588 void btrfs_test_destroy_inode(struct inode *inode); 3589 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3590 { 3591 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3592 } 3593 #else 3594 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3595 { 3596 return 0; 3597 } 3598 #endif 3599 3600 #endif 3601