1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <trace/events/btrfs.h> 20 #include <asm/unaligned.h> 21 #include <linux/pagemap.h> 22 #include <linux/btrfs.h> 23 #include <linux/btrfs_tree.h> 24 #include <linux/workqueue.h> 25 #include <linux/security.h> 26 #include <linux/sizes.h> 27 #include <linux/dynamic_debug.h> 28 #include <linux/refcount.h> 29 #include <linux/crc32c.h> 30 #include "extent-io-tree.h" 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 #include "block-rsv.h" 35 #include "locking.h" 36 37 struct btrfs_trans_handle; 38 struct btrfs_transaction; 39 struct btrfs_pending_snapshot; 40 struct btrfs_delayed_ref_root; 41 struct btrfs_space_info; 42 struct btrfs_block_group; 43 extern struct kmem_cache *btrfs_trans_handle_cachep; 44 extern struct kmem_cache *btrfs_bit_radix_cachep; 45 extern struct kmem_cache *btrfs_path_cachep; 46 extern struct kmem_cache *btrfs_free_space_cachep; 47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 48 struct btrfs_ordered_sum; 49 struct btrfs_ref; 50 51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 52 53 /* 54 * Maximum number of mirrors that can be available for all profiles counting 55 * the target device of dev-replace as one. During an active device replace 56 * procedure, the target device of the copy operation is a mirror for the 57 * filesystem data as well that can be used to read data in order to repair 58 * read errors on other disks. 59 * 60 * Current value is derived from RAID1C4 with 4 copies. 61 */ 62 #define BTRFS_MAX_MIRRORS (4 + 1) 63 64 #define BTRFS_MAX_LEVEL 8 65 66 #define BTRFS_OLDEST_GENERATION 0ULL 67 68 /* 69 * the max metadata block size. This limit is somewhat artificial, 70 * but the memmove costs go through the roof for larger blocks. 71 */ 72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 73 74 /* 75 * we can actually store much bigger names, but lets not confuse the rest 76 * of linux 77 */ 78 #define BTRFS_NAME_LEN 255 79 80 /* 81 * Theoretical limit is larger, but we keep this down to a sane 82 * value. That should limit greatly the possibility of collisions on 83 * inode ref items. 84 */ 85 #define BTRFS_LINK_MAX 65535U 86 87 #define BTRFS_EMPTY_DIR_SIZE 0 88 89 /* ioprio of readahead is set to idle */ 90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 91 92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 93 94 /* 95 * Use large batch size to reduce overhead of metadata updates. On the reader 96 * side, we only read it when we are close to ENOSPC and the read overhead is 97 * mostly related to the number of CPUs, so it is OK to use arbitrary large 98 * value here. 99 */ 100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 101 102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 103 104 /* 105 * Deltas are an effective way to populate global statistics. Give macro names 106 * to make it clear what we're doing. An example is discard_extents in 107 * btrfs_free_space_ctl. 108 */ 109 #define BTRFS_STAT_NR_ENTRIES 2 110 #define BTRFS_STAT_CURR 0 111 #define BTRFS_STAT_PREV 1 112 113 /* 114 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 115 */ 116 static inline u32 count_max_extents(u64 size) 117 { 118 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 119 } 120 121 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 122 { 123 BUG_ON(num_stripes == 0); 124 return sizeof(struct btrfs_chunk) + 125 sizeof(struct btrfs_stripe) * (num_stripes - 1); 126 } 127 128 /* 129 * Runtime (in-memory) states of filesystem 130 */ 131 enum { 132 /* Global indicator of serious filesystem errors */ 133 BTRFS_FS_STATE_ERROR, 134 /* 135 * Filesystem is being remounted, allow to skip some operations, like 136 * defrag 137 */ 138 BTRFS_FS_STATE_REMOUNTING, 139 /* Track if a transaction abort has been reported on this filesystem */ 140 BTRFS_FS_STATE_TRANS_ABORTED, 141 /* 142 * Bio operations should be blocked on this filesystem because a source 143 * or target device is being destroyed as part of a device replace 144 */ 145 BTRFS_FS_STATE_DEV_REPLACING, 146 /* The btrfs_fs_info created for self-tests */ 147 BTRFS_FS_STATE_DUMMY_FS_INFO, 148 }; 149 150 #define BTRFS_BACKREF_REV_MAX 256 151 #define BTRFS_BACKREF_REV_SHIFT 56 152 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 153 BTRFS_BACKREF_REV_SHIFT) 154 155 #define BTRFS_OLD_BACKREF_REV 0 156 #define BTRFS_MIXED_BACKREF_REV 1 157 158 /* 159 * every tree block (leaf or node) starts with this header. 160 */ 161 struct btrfs_header { 162 /* these first four must match the super block */ 163 u8 csum[BTRFS_CSUM_SIZE]; 164 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 165 __le64 bytenr; /* which block this node is supposed to live in */ 166 __le64 flags; 167 168 /* allowed to be different from the super from here on down */ 169 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 170 __le64 generation; 171 __le64 owner; 172 __le32 nritems; 173 u8 level; 174 } __attribute__ ((__packed__)); 175 176 /* 177 * this is a very generous portion of the super block, giving us 178 * room to translate 14 chunks with 3 stripes each. 179 */ 180 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 181 182 /* 183 * just in case we somehow lose the roots and are not able to mount, 184 * we store an array of the roots from previous transactions 185 * in the super. 186 */ 187 #define BTRFS_NUM_BACKUP_ROOTS 4 188 struct btrfs_root_backup { 189 __le64 tree_root; 190 __le64 tree_root_gen; 191 192 __le64 chunk_root; 193 __le64 chunk_root_gen; 194 195 __le64 extent_root; 196 __le64 extent_root_gen; 197 198 __le64 fs_root; 199 __le64 fs_root_gen; 200 201 __le64 dev_root; 202 __le64 dev_root_gen; 203 204 __le64 csum_root; 205 __le64 csum_root_gen; 206 207 __le64 total_bytes; 208 __le64 bytes_used; 209 __le64 num_devices; 210 /* future */ 211 __le64 unused_64[4]; 212 213 u8 tree_root_level; 214 u8 chunk_root_level; 215 u8 extent_root_level; 216 u8 fs_root_level; 217 u8 dev_root_level; 218 u8 csum_root_level; 219 /* future and to align */ 220 u8 unused_8[10]; 221 } __attribute__ ((__packed__)); 222 223 /* 224 * the super block basically lists the main trees of the FS 225 * it currently lacks any block count etc etc 226 */ 227 struct btrfs_super_block { 228 /* the first 4 fields must match struct btrfs_header */ 229 u8 csum[BTRFS_CSUM_SIZE]; 230 /* FS specific UUID, visible to user */ 231 u8 fsid[BTRFS_FSID_SIZE]; 232 __le64 bytenr; /* this block number */ 233 __le64 flags; 234 235 /* allowed to be different from the btrfs_header from here own down */ 236 __le64 magic; 237 __le64 generation; 238 __le64 root; 239 __le64 chunk_root; 240 __le64 log_root; 241 242 /* this will help find the new super based on the log root */ 243 __le64 log_root_transid; 244 __le64 total_bytes; 245 __le64 bytes_used; 246 __le64 root_dir_objectid; 247 __le64 num_devices; 248 __le32 sectorsize; 249 __le32 nodesize; 250 __le32 __unused_leafsize; 251 __le32 stripesize; 252 __le32 sys_chunk_array_size; 253 __le64 chunk_root_generation; 254 __le64 compat_flags; 255 __le64 compat_ro_flags; 256 __le64 incompat_flags; 257 __le16 csum_type; 258 u8 root_level; 259 u8 chunk_root_level; 260 u8 log_root_level; 261 struct btrfs_dev_item dev_item; 262 263 char label[BTRFS_LABEL_SIZE]; 264 265 __le64 cache_generation; 266 __le64 uuid_tree_generation; 267 268 /* the UUID written into btree blocks */ 269 u8 metadata_uuid[BTRFS_FSID_SIZE]; 270 271 /* future expansion */ 272 __le64 reserved[28]; 273 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 274 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 275 } __attribute__ ((__packed__)); 276 277 /* 278 * Compat flags that we support. If any incompat flags are set other than the 279 * ones specified below then we will fail to mount 280 */ 281 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 282 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 283 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 284 285 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 286 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 287 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 288 289 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 291 292 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 293 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 294 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 295 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 296 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 297 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 298 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 299 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 300 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 301 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 302 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 303 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 304 BTRFS_FEATURE_INCOMPAT_RAID1C34) 305 306 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 307 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 308 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 309 310 /* 311 * A leaf is full of items. offset and size tell us where to find 312 * the item in the leaf (relative to the start of the data area) 313 */ 314 struct btrfs_item { 315 struct btrfs_disk_key key; 316 __le32 offset; 317 __le32 size; 318 } __attribute__ ((__packed__)); 319 320 /* 321 * leaves have an item area and a data area: 322 * [item0, item1....itemN] [free space] [dataN...data1, data0] 323 * 324 * The data is separate from the items to get the keys closer together 325 * during searches. 326 */ 327 struct btrfs_leaf { 328 struct btrfs_header header; 329 struct btrfs_item items[]; 330 } __attribute__ ((__packed__)); 331 332 /* 333 * all non-leaf blocks are nodes, they hold only keys and pointers to 334 * other blocks 335 */ 336 struct btrfs_key_ptr { 337 struct btrfs_disk_key key; 338 __le64 blockptr; 339 __le64 generation; 340 } __attribute__ ((__packed__)); 341 342 struct btrfs_node { 343 struct btrfs_header header; 344 struct btrfs_key_ptr ptrs[]; 345 } __attribute__ ((__packed__)); 346 347 /* 348 * btrfs_paths remember the path taken from the root down to the leaf. 349 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 350 * to any other levels that are present. 351 * 352 * The slots array records the index of the item or block pointer 353 * used while walking the tree. 354 */ 355 enum { READA_NONE, READA_BACK, READA_FORWARD }; 356 struct btrfs_path { 357 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 358 int slots[BTRFS_MAX_LEVEL]; 359 /* if there is real range locking, this locks field will change */ 360 u8 locks[BTRFS_MAX_LEVEL]; 361 u8 reada; 362 /* keep some upper locks as we walk down */ 363 u8 lowest_level; 364 365 /* 366 * set by btrfs_split_item, tells search_slot to keep all locks 367 * and to force calls to keep space in the nodes 368 */ 369 unsigned int search_for_split:1; 370 unsigned int keep_locks:1; 371 unsigned int skip_locking:1; 372 unsigned int leave_spinning:1; 373 unsigned int search_commit_root:1; 374 unsigned int need_commit_sem:1; 375 unsigned int skip_release_on_error:1; 376 unsigned int recurse:1; 377 }; 378 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 379 sizeof(struct btrfs_item)) 380 struct btrfs_dev_replace { 381 u64 replace_state; /* see #define above */ 382 time64_t time_started; /* seconds since 1-Jan-1970 */ 383 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 384 atomic64_t num_write_errors; 385 atomic64_t num_uncorrectable_read_errors; 386 387 u64 cursor_left; 388 u64 committed_cursor_left; 389 u64 cursor_left_last_write_of_item; 390 u64 cursor_right; 391 392 u64 cont_reading_from_srcdev_mode; /* see #define above */ 393 394 int is_valid; 395 int item_needs_writeback; 396 struct btrfs_device *srcdev; 397 struct btrfs_device *tgtdev; 398 399 struct mutex lock_finishing_cancel_unmount; 400 struct rw_semaphore rwsem; 401 402 struct btrfs_scrub_progress scrub_progress; 403 404 struct percpu_counter bio_counter; 405 wait_queue_head_t replace_wait; 406 }; 407 408 /* 409 * free clusters are used to claim free space in relatively large chunks, 410 * allowing us to do less seeky writes. They are used for all metadata 411 * allocations. In ssd_spread mode they are also used for data allocations. 412 */ 413 struct btrfs_free_cluster { 414 spinlock_t lock; 415 spinlock_t refill_lock; 416 struct rb_root root; 417 418 /* largest extent in this cluster */ 419 u64 max_size; 420 421 /* first extent starting offset */ 422 u64 window_start; 423 424 /* We did a full search and couldn't create a cluster */ 425 bool fragmented; 426 427 struct btrfs_block_group *block_group; 428 /* 429 * when a cluster is allocated from a block group, we put the 430 * cluster onto a list in the block group so that it can 431 * be freed before the block group is freed. 432 */ 433 struct list_head block_group_list; 434 }; 435 436 enum btrfs_caching_type { 437 BTRFS_CACHE_NO, 438 BTRFS_CACHE_STARTED, 439 BTRFS_CACHE_FAST, 440 BTRFS_CACHE_FINISHED, 441 BTRFS_CACHE_ERROR, 442 }; 443 444 /* 445 * Tree to record all locked full stripes of a RAID5/6 block group 446 */ 447 struct btrfs_full_stripe_locks_tree { 448 struct rb_root root; 449 struct mutex lock; 450 }; 451 452 /* Discard control. */ 453 /* 454 * Async discard uses multiple lists to differentiate the discard filter 455 * parameters. Index 0 is for completely free block groups where we need to 456 * ensure the entire block group is trimmed without being lossy. Indices 457 * afterwards represent monotonically decreasing discard filter sizes to 458 * prioritize what should be discarded next. 459 */ 460 #define BTRFS_NR_DISCARD_LISTS 3 461 #define BTRFS_DISCARD_INDEX_UNUSED 0 462 #define BTRFS_DISCARD_INDEX_START 1 463 464 struct btrfs_discard_ctl { 465 struct workqueue_struct *discard_workers; 466 struct delayed_work work; 467 spinlock_t lock; 468 struct btrfs_block_group *block_group; 469 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 470 u64 prev_discard; 471 atomic_t discardable_extents; 472 atomic64_t discardable_bytes; 473 u64 max_discard_size; 474 unsigned long delay; 475 u32 iops_limit; 476 u32 kbps_limit; 477 u64 discard_extent_bytes; 478 u64 discard_bitmap_bytes; 479 atomic64_t discard_bytes_saved; 480 }; 481 482 /* delayed seq elem */ 483 struct seq_list { 484 struct list_head list; 485 u64 seq; 486 }; 487 488 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 489 490 #define SEQ_LAST ((u64)-1) 491 492 enum btrfs_orphan_cleanup_state { 493 ORPHAN_CLEANUP_STARTED = 1, 494 ORPHAN_CLEANUP_DONE = 2, 495 }; 496 497 void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info); 498 499 /* fs_info */ 500 struct reloc_control; 501 struct btrfs_device; 502 struct btrfs_fs_devices; 503 struct btrfs_balance_control; 504 struct btrfs_delayed_root; 505 506 /* 507 * Block group or device which contains an active swapfile. Used for preventing 508 * unsafe operations while a swapfile is active. 509 * 510 * These are sorted on (ptr, inode) (note that a block group or device can 511 * contain more than one swapfile). We compare the pointer values because we 512 * don't actually care what the object is, we just need a quick check whether 513 * the object exists in the rbtree. 514 */ 515 struct btrfs_swapfile_pin { 516 struct rb_node node; 517 void *ptr; 518 struct inode *inode; 519 /* 520 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 521 * points to a struct btrfs_device. 522 */ 523 bool is_block_group; 524 }; 525 526 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 527 528 enum { 529 BTRFS_FS_BARRIER, 530 BTRFS_FS_CLOSING_START, 531 BTRFS_FS_CLOSING_DONE, 532 BTRFS_FS_LOG_RECOVERING, 533 BTRFS_FS_OPEN, 534 BTRFS_FS_QUOTA_ENABLED, 535 BTRFS_FS_UPDATE_UUID_TREE_GEN, 536 BTRFS_FS_CREATING_FREE_SPACE_TREE, 537 BTRFS_FS_BTREE_ERR, 538 BTRFS_FS_LOG1_ERR, 539 BTRFS_FS_LOG2_ERR, 540 BTRFS_FS_QUOTA_OVERRIDE, 541 /* Used to record internally whether fs has been frozen */ 542 BTRFS_FS_FROZEN, 543 /* 544 * Indicate that balance has been set up from the ioctl and is in the 545 * main phase. The fs_info::balance_ctl is initialized. 546 * Set and cleared while holding fs_info::balance_mutex. 547 */ 548 BTRFS_FS_BALANCE_RUNNING, 549 550 /* Indicate that the cleaner thread is awake and doing something. */ 551 BTRFS_FS_CLEANER_RUNNING, 552 553 /* 554 * The checksumming has an optimized version and is considered fast, 555 * so we don't need to offload checksums to workqueues. 556 */ 557 BTRFS_FS_CSUM_IMPL_FAST, 558 559 /* Indicate that the discard workqueue can service discards. */ 560 BTRFS_FS_DISCARD_RUNNING, 561 }; 562 563 /* 564 * Exclusive operations (device replace, resize, device add/remove, balance) 565 */ 566 enum btrfs_exclusive_operation { 567 BTRFS_EXCLOP_NONE, 568 BTRFS_EXCLOP_BALANCE, 569 BTRFS_EXCLOP_DEV_ADD, 570 BTRFS_EXCLOP_DEV_REMOVE, 571 BTRFS_EXCLOP_DEV_REPLACE, 572 BTRFS_EXCLOP_RESIZE, 573 BTRFS_EXCLOP_SWAP_ACTIVATE, 574 }; 575 576 struct btrfs_fs_info { 577 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 578 unsigned long flags; 579 struct btrfs_root *extent_root; 580 struct btrfs_root *tree_root; 581 struct btrfs_root *chunk_root; 582 struct btrfs_root *dev_root; 583 struct btrfs_root *fs_root; 584 struct btrfs_root *csum_root; 585 struct btrfs_root *quota_root; 586 struct btrfs_root *uuid_root; 587 struct btrfs_root *free_space_root; 588 struct btrfs_root *data_reloc_root; 589 590 /* the log root tree is a directory of all the other log roots */ 591 struct btrfs_root *log_root_tree; 592 593 spinlock_t fs_roots_radix_lock; 594 struct radix_tree_root fs_roots_radix; 595 596 /* block group cache stuff */ 597 spinlock_t block_group_cache_lock; 598 u64 first_logical_byte; 599 struct rb_root block_group_cache_tree; 600 601 /* keep track of unallocated space */ 602 atomic64_t free_chunk_space; 603 604 /* Track ranges which are used by log trees blocks/logged data extents */ 605 struct extent_io_tree excluded_extents; 606 607 /* logical->physical extent mapping */ 608 struct extent_map_tree mapping_tree; 609 610 /* 611 * block reservation for extent, checksum, root tree and 612 * delayed dir index item 613 */ 614 struct btrfs_block_rsv global_block_rsv; 615 /* block reservation for metadata operations */ 616 struct btrfs_block_rsv trans_block_rsv; 617 /* block reservation for chunk tree */ 618 struct btrfs_block_rsv chunk_block_rsv; 619 /* block reservation for delayed operations */ 620 struct btrfs_block_rsv delayed_block_rsv; 621 /* block reservation for delayed refs */ 622 struct btrfs_block_rsv delayed_refs_rsv; 623 624 struct btrfs_block_rsv empty_block_rsv; 625 626 u64 generation; 627 u64 last_trans_committed; 628 u64 avg_delayed_ref_runtime; 629 630 /* 631 * this is updated to the current trans every time a full commit 632 * is required instead of the faster short fsync log commits 633 */ 634 u64 last_trans_log_full_commit; 635 unsigned long mount_opt; 636 /* 637 * Track requests for actions that need to be done during transaction 638 * commit (like for some mount options). 639 */ 640 unsigned long pending_changes; 641 unsigned long compress_type:4; 642 unsigned int compress_level; 643 u32 commit_interval; 644 /* 645 * It is a suggestive number, the read side is safe even it gets a 646 * wrong number because we will write out the data into a regular 647 * extent. The write side(mount/remount) is under ->s_umount lock, 648 * so it is also safe. 649 */ 650 u64 max_inline; 651 652 struct btrfs_transaction *running_transaction; 653 wait_queue_head_t transaction_throttle; 654 wait_queue_head_t transaction_wait; 655 wait_queue_head_t transaction_blocked_wait; 656 wait_queue_head_t async_submit_wait; 657 658 /* 659 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 660 * when they are updated. 661 * 662 * Because we do not clear the flags for ever, so we needn't use 663 * the lock on the read side. 664 * 665 * We also needn't use the lock when we mount the fs, because 666 * there is no other task which will update the flag. 667 */ 668 spinlock_t super_lock; 669 struct btrfs_super_block *super_copy; 670 struct btrfs_super_block *super_for_commit; 671 struct super_block *sb; 672 struct inode *btree_inode; 673 struct mutex tree_log_mutex; 674 struct mutex transaction_kthread_mutex; 675 struct mutex cleaner_mutex; 676 struct mutex chunk_mutex; 677 678 /* 679 * this is taken to make sure we don't set block groups ro after 680 * the free space cache has been allocated on them 681 */ 682 struct mutex ro_block_group_mutex; 683 684 /* this is used during read/modify/write to make sure 685 * no two ios are trying to mod the same stripe at the same 686 * time 687 */ 688 struct btrfs_stripe_hash_table *stripe_hash_table; 689 690 /* 691 * this protects the ordered operations list only while we are 692 * processing all of the entries on it. This way we make 693 * sure the commit code doesn't find the list temporarily empty 694 * because another function happens to be doing non-waiting preflush 695 * before jumping into the main commit. 696 */ 697 struct mutex ordered_operations_mutex; 698 699 struct rw_semaphore commit_root_sem; 700 701 struct rw_semaphore cleanup_work_sem; 702 703 struct rw_semaphore subvol_sem; 704 705 spinlock_t trans_lock; 706 /* 707 * the reloc mutex goes with the trans lock, it is taken 708 * during commit to protect us from the relocation code 709 */ 710 struct mutex reloc_mutex; 711 712 struct list_head trans_list; 713 struct list_head dead_roots; 714 struct list_head caching_block_groups; 715 716 spinlock_t delayed_iput_lock; 717 struct list_head delayed_iputs; 718 atomic_t nr_delayed_iputs; 719 wait_queue_head_t delayed_iputs_wait; 720 721 atomic64_t tree_mod_seq; 722 723 /* this protects tree_mod_log and tree_mod_seq_list */ 724 rwlock_t tree_mod_log_lock; 725 struct rb_root tree_mod_log; 726 struct list_head tree_mod_seq_list; 727 728 atomic_t async_delalloc_pages; 729 730 /* 731 * this is used to protect the following list -- ordered_roots. 732 */ 733 spinlock_t ordered_root_lock; 734 735 /* 736 * all fs/file tree roots in which there are data=ordered extents 737 * pending writeback are added into this list. 738 * 739 * these can span multiple transactions and basically include 740 * every dirty data page that isn't from nodatacow 741 */ 742 struct list_head ordered_roots; 743 744 struct mutex delalloc_root_mutex; 745 spinlock_t delalloc_root_lock; 746 /* all fs/file tree roots that have delalloc inodes. */ 747 struct list_head delalloc_roots; 748 749 /* 750 * there is a pool of worker threads for checksumming during writes 751 * and a pool for checksumming after reads. This is because readers 752 * can run with FS locks held, and the writers may be waiting for 753 * those locks. We don't want ordering in the pending list to cause 754 * deadlocks, and so the two are serviced separately. 755 * 756 * A third pool does submit_bio to avoid deadlocking with the other 757 * two 758 */ 759 struct btrfs_workqueue *workers; 760 struct btrfs_workqueue *delalloc_workers; 761 struct btrfs_workqueue *flush_workers; 762 struct btrfs_workqueue *endio_workers; 763 struct btrfs_workqueue *endio_meta_workers; 764 struct btrfs_workqueue *endio_raid56_workers; 765 struct btrfs_workqueue *rmw_workers; 766 struct btrfs_workqueue *endio_meta_write_workers; 767 struct btrfs_workqueue *endio_write_workers; 768 struct btrfs_workqueue *endio_freespace_worker; 769 struct btrfs_workqueue *caching_workers; 770 struct btrfs_workqueue *readahead_workers; 771 772 /* 773 * fixup workers take dirty pages that didn't properly go through 774 * the cow mechanism and make them safe to write. It happens 775 * for the sys_munmap function call path 776 */ 777 struct btrfs_workqueue *fixup_workers; 778 struct btrfs_workqueue *delayed_workers; 779 780 struct task_struct *transaction_kthread; 781 struct task_struct *cleaner_kthread; 782 u32 thread_pool_size; 783 784 struct kobject *space_info_kobj; 785 struct kobject *qgroups_kobj; 786 787 u64 total_pinned; 788 789 /* used to keep from writing metadata until there is a nice batch */ 790 struct percpu_counter dirty_metadata_bytes; 791 struct percpu_counter delalloc_bytes; 792 struct percpu_counter dio_bytes; 793 s32 dirty_metadata_batch; 794 s32 delalloc_batch; 795 796 struct list_head dirty_cowonly_roots; 797 798 struct btrfs_fs_devices *fs_devices; 799 800 /* 801 * The space_info list is effectively read only after initial 802 * setup. It is populated at mount time and cleaned up after 803 * all block groups are removed. RCU is used to protect it. 804 */ 805 struct list_head space_info; 806 807 struct btrfs_space_info *data_sinfo; 808 809 struct reloc_control *reloc_ctl; 810 811 /* data_alloc_cluster is only used in ssd_spread mode */ 812 struct btrfs_free_cluster data_alloc_cluster; 813 814 /* all metadata allocations go through this cluster */ 815 struct btrfs_free_cluster meta_alloc_cluster; 816 817 /* auto defrag inodes go here */ 818 spinlock_t defrag_inodes_lock; 819 struct rb_root defrag_inodes; 820 atomic_t defrag_running; 821 822 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 823 seqlock_t profiles_lock; 824 /* 825 * these three are in extended format (availability of single 826 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 827 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 828 */ 829 u64 avail_data_alloc_bits; 830 u64 avail_metadata_alloc_bits; 831 u64 avail_system_alloc_bits; 832 833 /* restriper state */ 834 spinlock_t balance_lock; 835 struct mutex balance_mutex; 836 atomic_t balance_pause_req; 837 atomic_t balance_cancel_req; 838 struct btrfs_balance_control *balance_ctl; 839 wait_queue_head_t balance_wait_q; 840 841 u32 data_chunk_allocations; 842 u32 metadata_ratio; 843 844 void *bdev_holder; 845 846 /* private scrub information */ 847 struct mutex scrub_lock; 848 atomic_t scrubs_running; 849 atomic_t scrub_pause_req; 850 atomic_t scrubs_paused; 851 atomic_t scrub_cancel_req; 852 wait_queue_head_t scrub_pause_wait; 853 /* 854 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 855 * running. 856 */ 857 refcount_t scrub_workers_refcnt; 858 struct btrfs_workqueue *scrub_workers; 859 struct btrfs_workqueue *scrub_wr_completion_workers; 860 struct btrfs_workqueue *scrub_parity_workers; 861 862 struct btrfs_discard_ctl discard_ctl; 863 864 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 865 u32 check_integrity_print_mask; 866 #endif 867 /* is qgroup tracking in a consistent state? */ 868 u64 qgroup_flags; 869 870 /* holds configuration and tracking. Protected by qgroup_lock */ 871 struct rb_root qgroup_tree; 872 spinlock_t qgroup_lock; 873 874 /* 875 * used to avoid frequently calling ulist_alloc()/ulist_free() 876 * when doing qgroup accounting, it must be protected by qgroup_lock. 877 */ 878 struct ulist *qgroup_ulist; 879 880 /* 881 * Protect user change for quota operations. If a transaction is needed, 882 * it must be started before locking this lock. 883 */ 884 struct mutex qgroup_ioctl_lock; 885 886 /* list of dirty qgroups to be written at next commit */ 887 struct list_head dirty_qgroups; 888 889 /* used by qgroup for an efficient tree traversal */ 890 u64 qgroup_seq; 891 892 /* qgroup rescan items */ 893 struct mutex qgroup_rescan_lock; /* protects the progress item */ 894 struct btrfs_key qgroup_rescan_progress; 895 struct btrfs_workqueue *qgroup_rescan_workers; 896 struct completion qgroup_rescan_completion; 897 struct btrfs_work qgroup_rescan_work; 898 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 899 900 /* filesystem state */ 901 unsigned long fs_state; 902 903 struct btrfs_delayed_root *delayed_root; 904 905 /* readahead tree */ 906 spinlock_t reada_lock; 907 struct radix_tree_root reada_tree; 908 909 /* readahead works cnt */ 910 atomic_t reada_works_cnt; 911 912 /* Extent buffer radix tree */ 913 spinlock_t buffer_lock; 914 struct radix_tree_root buffer_radix; 915 916 /* next backup root to be overwritten */ 917 int backup_root_index; 918 919 /* device replace state */ 920 struct btrfs_dev_replace dev_replace; 921 922 struct semaphore uuid_tree_rescan_sem; 923 924 /* Used to reclaim the metadata space in the background. */ 925 struct work_struct async_reclaim_work; 926 struct work_struct async_data_reclaim_work; 927 928 spinlock_t unused_bgs_lock; 929 struct list_head unused_bgs; 930 struct mutex unused_bg_unpin_mutex; 931 struct mutex delete_unused_bgs_mutex; 932 933 /* Cached block sizes */ 934 u32 nodesize; 935 u32 sectorsize; 936 u32 stripesize; 937 938 /* Block groups and devices containing active swapfiles. */ 939 spinlock_t swapfile_pins_lock; 940 struct rb_root swapfile_pins; 941 942 struct crypto_shash *csum_shash; 943 944 /* 945 * Number of send operations in progress. 946 * Updated while holding fs_info::balance_mutex. 947 */ 948 int send_in_progress; 949 950 /* Type of exclusive operation running */ 951 unsigned long exclusive_operation; 952 953 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 954 spinlock_t ref_verify_lock; 955 struct rb_root block_tree; 956 #endif 957 958 #ifdef CONFIG_BTRFS_DEBUG 959 struct kobject *debug_kobj; 960 struct kobject *discard_debug_kobj; 961 struct list_head allocated_roots; 962 963 spinlock_t eb_leak_lock; 964 struct list_head allocated_ebs; 965 #endif 966 }; 967 968 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 969 { 970 return sb->s_fs_info; 971 } 972 973 /* 974 * The state of btrfs root 975 */ 976 enum { 977 /* 978 * btrfs_record_root_in_trans is a multi-step process, and it can race 979 * with the balancing code. But the race is very small, and only the 980 * first time the root is added to each transaction. So IN_TRANS_SETUP 981 * is used to tell us when more checks are required 982 */ 983 BTRFS_ROOT_IN_TRANS_SETUP, 984 985 /* 986 * Set if tree blocks of this root can be shared by other roots. 987 * Only subvolume trees and their reloc trees have this bit set. 988 * Conflicts with TRACK_DIRTY bit. 989 * 990 * This affects two things: 991 * 992 * - How balance works 993 * For shareable roots, we need to use reloc tree and do path 994 * replacement for balance, and need various pre/post hooks for 995 * snapshot creation to handle them. 996 * 997 * While for non-shareable trees, we just simply do a tree search 998 * with COW. 999 * 1000 * - How dirty roots are tracked 1001 * For shareable roots, btrfs_record_root_in_trans() is needed to 1002 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1003 * don't need to set this manually. 1004 */ 1005 BTRFS_ROOT_SHAREABLE, 1006 BTRFS_ROOT_TRACK_DIRTY, 1007 BTRFS_ROOT_IN_RADIX, 1008 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1009 BTRFS_ROOT_DEFRAG_RUNNING, 1010 BTRFS_ROOT_FORCE_COW, 1011 BTRFS_ROOT_MULTI_LOG_TASKS, 1012 BTRFS_ROOT_DIRTY, 1013 BTRFS_ROOT_DELETING, 1014 1015 /* 1016 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1017 * 1018 * Set for the subvolume tree owning the reloc tree. 1019 */ 1020 BTRFS_ROOT_DEAD_RELOC_TREE, 1021 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1022 BTRFS_ROOT_DEAD_TREE, 1023 /* The root has a log tree. Used only for subvolume roots. */ 1024 BTRFS_ROOT_HAS_LOG_TREE, 1025 /* Qgroup flushing is in progress */ 1026 BTRFS_ROOT_QGROUP_FLUSHING, 1027 }; 1028 1029 /* 1030 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1031 * code. For detail check comment in fs/btrfs/qgroup.c. 1032 */ 1033 struct btrfs_qgroup_swapped_blocks { 1034 spinlock_t lock; 1035 /* RM_EMPTY_ROOT() of above blocks[] */ 1036 bool swapped; 1037 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1038 }; 1039 1040 /* 1041 * in ram representation of the tree. extent_root is used for all allocations 1042 * and for the extent tree extent_root root. 1043 */ 1044 struct btrfs_root { 1045 struct extent_buffer *node; 1046 1047 struct extent_buffer *commit_root; 1048 struct btrfs_root *log_root; 1049 struct btrfs_root *reloc_root; 1050 1051 unsigned long state; 1052 struct btrfs_root_item root_item; 1053 struct btrfs_key root_key; 1054 struct btrfs_fs_info *fs_info; 1055 struct extent_io_tree dirty_log_pages; 1056 1057 struct mutex objectid_mutex; 1058 1059 spinlock_t accounting_lock; 1060 struct btrfs_block_rsv *block_rsv; 1061 1062 /* free ino cache stuff */ 1063 struct btrfs_free_space_ctl *free_ino_ctl; 1064 enum btrfs_caching_type ino_cache_state; 1065 spinlock_t ino_cache_lock; 1066 wait_queue_head_t ino_cache_wait; 1067 struct btrfs_free_space_ctl *free_ino_pinned; 1068 u64 ino_cache_progress; 1069 struct inode *ino_cache_inode; 1070 1071 struct mutex log_mutex; 1072 wait_queue_head_t log_writer_wait; 1073 wait_queue_head_t log_commit_wait[2]; 1074 struct list_head log_ctxs[2]; 1075 /* Used only for log trees of subvolumes, not for the log root tree */ 1076 atomic_t log_writers; 1077 atomic_t log_commit[2]; 1078 /* Used only for log trees of subvolumes, not for the log root tree */ 1079 atomic_t log_batch; 1080 int log_transid; 1081 /* No matter the commit succeeds or not*/ 1082 int log_transid_committed; 1083 /* Just be updated when the commit succeeds. */ 1084 int last_log_commit; 1085 pid_t log_start_pid; 1086 1087 u64 last_trans; 1088 1089 u32 type; 1090 1091 u64 highest_objectid; 1092 1093 struct btrfs_key defrag_progress; 1094 struct btrfs_key defrag_max; 1095 1096 /* The dirty list is only used by non-shareable roots */ 1097 struct list_head dirty_list; 1098 1099 struct list_head root_list; 1100 1101 spinlock_t log_extents_lock[2]; 1102 struct list_head logged_list[2]; 1103 1104 int orphan_cleanup_state; 1105 1106 spinlock_t inode_lock; 1107 /* red-black tree that keeps track of in-memory inodes */ 1108 struct rb_root inode_tree; 1109 1110 /* 1111 * radix tree that keeps track of delayed nodes of every inode, 1112 * protected by inode_lock 1113 */ 1114 struct radix_tree_root delayed_nodes_tree; 1115 /* 1116 * right now this just gets used so that a root has its own devid 1117 * for stat. It may be used for more later 1118 */ 1119 dev_t anon_dev; 1120 1121 spinlock_t root_item_lock; 1122 refcount_t refs; 1123 1124 struct mutex delalloc_mutex; 1125 spinlock_t delalloc_lock; 1126 /* 1127 * all of the inodes that have delalloc bytes. It is possible for 1128 * this list to be empty even when there is still dirty data=ordered 1129 * extents waiting to finish IO. 1130 */ 1131 struct list_head delalloc_inodes; 1132 struct list_head delalloc_root; 1133 u64 nr_delalloc_inodes; 1134 1135 struct mutex ordered_extent_mutex; 1136 /* 1137 * this is used by the balancing code to wait for all the pending 1138 * ordered extents 1139 */ 1140 spinlock_t ordered_extent_lock; 1141 1142 /* 1143 * all of the data=ordered extents pending writeback 1144 * these can span multiple transactions and basically include 1145 * every dirty data page that isn't from nodatacow 1146 */ 1147 struct list_head ordered_extents; 1148 struct list_head ordered_root; 1149 u64 nr_ordered_extents; 1150 1151 /* 1152 * Not empty if this subvolume root has gone through tree block swap 1153 * (relocation) 1154 * 1155 * Will be used by reloc_control::dirty_subvol_roots. 1156 */ 1157 struct list_head reloc_dirty_list; 1158 1159 /* 1160 * Number of currently running SEND ioctls to prevent 1161 * manipulation with the read-only status via SUBVOL_SETFLAGS 1162 */ 1163 int send_in_progress; 1164 /* 1165 * Number of currently running deduplication operations that have a 1166 * destination inode belonging to this root. Protected by the lock 1167 * root_item_lock. 1168 */ 1169 int dedupe_in_progress; 1170 /* For exclusion of snapshot creation and nocow writes */ 1171 struct btrfs_drew_lock snapshot_lock; 1172 1173 atomic_t snapshot_force_cow; 1174 1175 /* For qgroup metadata reserved space */ 1176 spinlock_t qgroup_meta_rsv_lock; 1177 u64 qgroup_meta_rsv_pertrans; 1178 u64 qgroup_meta_rsv_prealloc; 1179 wait_queue_head_t qgroup_flush_wait; 1180 1181 /* Number of active swapfiles */ 1182 atomic_t nr_swapfiles; 1183 1184 /* Record pairs of swapped blocks for qgroup */ 1185 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1186 1187 /* Used only by log trees, when logging csum items */ 1188 struct extent_io_tree log_csum_range; 1189 1190 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1191 u64 alloc_bytenr; 1192 #endif 1193 1194 #ifdef CONFIG_BTRFS_DEBUG 1195 struct list_head leak_list; 1196 #endif 1197 }; 1198 1199 /* 1200 * Structure that conveys information about an extent that is going to replace 1201 * all the extents in a file range. 1202 */ 1203 struct btrfs_replace_extent_info { 1204 u64 disk_offset; 1205 u64 disk_len; 1206 u64 data_offset; 1207 u64 data_len; 1208 u64 file_offset; 1209 /* Pointer to a file extent item of type regular or prealloc. */ 1210 char *extent_buf; 1211 /* 1212 * Set to true when attempting to replace a file range with a new extent 1213 * described by this structure, set to false when attempting to clone an 1214 * existing extent into a file range. 1215 */ 1216 bool is_new_extent; 1217 /* Meaningful only if is_new_extent is true. */ 1218 int qgroup_reserved; 1219 /* 1220 * Meaningful only if is_new_extent is true. 1221 * Used to track how many extent items we have already inserted in a 1222 * subvolume tree that refer to the extent described by this structure, 1223 * so that we know when to create a new delayed ref or update an existing 1224 * one. 1225 */ 1226 int insertions; 1227 }; 1228 1229 struct btrfs_file_private { 1230 void *filldir_buf; 1231 }; 1232 1233 1234 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1235 { 1236 1237 return info->nodesize - sizeof(struct btrfs_header); 1238 } 1239 1240 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1241 1242 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1243 { 1244 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1245 } 1246 1247 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1248 { 1249 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1250 } 1251 1252 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1253 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1254 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1255 { 1256 return BTRFS_MAX_ITEM_SIZE(info) - 1257 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1258 } 1259 1260 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1261 { 1262 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1263 } 1264 1265 /* 1266 * Flags for mount options. 1267 * 1268 * Note: don't forget to add new options to btrfs_show_options() 1269 */ 1270 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1271 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1272 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1273 #define BTRFS_MOUNT_SSD (1 << 3) 1274 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1275 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1276 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1277 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1278 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1279 #define BTRFS_MOUNT_NOSSD (1 << 9) 1280 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1281 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1282 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1283 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1284 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1285 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1286 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1287 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1288 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1289 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1290 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1291 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1292 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1293 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1294 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1295 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1296 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1297 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1298 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1299 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1300 1301 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1302 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1303 1304 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1305 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1306 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1307 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1308 BTRFS_MOUNT_##opt) 1309 1310 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1311 do { \ 1312 if (!btrfs_test_opt(fs_info, opt)) \ 1313 btrfs_info(fs_info, fmt, ##args); \ 1314 btrfs_set_opt(fs_info->mount_opt, opt); \ 1315 } while (0) 1316 1317 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1318 do { \ 1319 if (btrfs_test_opt(fs_info, opt)) \ 1320 btrfs_info(fs_info, fmt, ##args); \ 1321 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1322 } while (0) 1323 1324 /* 1325 * Requests for changes that need to be done during transaction commit. 1326 * 1327 * Internal mount options that are used for special handling of the real 1328 * mount options (eg. cannot be set during remount and have to be set during 1329 * transaction commit) 1330 */ 1331 1332 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1333 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1334 #define BTRFS_PENDING_COMMIT (2) 1335 1336 #define btrfs_test_pending(info, opt) \ 1337 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1338 #define btrfs_set_pending(info, opt) \ 1339 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1340 #define btrfs_clear_pending(info, opt) \ 1341 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1342 1343 /* 1344 * Helpers for setting pending mount option changes. 1345 * 1346 * Expects corresponding macros 1347 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1348 */ 1349 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1350 do { \ 1351 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1352 btrfs_info((info), fmt, ##args); \ 1353 btrfs_set_pending((info), SET_##opt); \ 1354 btrfs_clear_pending((info), CLEAR_##opt); \ 1355 } \ 1356 } while(0) 1357 1358 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1359 do { \ 1360 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1361 btrfs_info((info), fmt, ##args); \ 1362 btrfs_set_pending((info), CLEAR_##opt); \ 1363 btrfs_clear_pending((info), SET_##opt); \ 1364 } \ 1365 } while(0) 1366 1367 /* 1368 * Inode flags 1369 */ 1370 #define BTRFS_INODE_NODATASUM (1 << 0) 1371 #define BTRFS_INODE_NODATACOW (1 << 1) 1372 #define BTRFS_INODE_READONLY (1 << 2) 1373 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1374 #define BTRFS_INODE_PREALLOC (1 << 4) 1375 #define BTRFS_INODE_SYNC (1 << 5) 1376 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1377 #define BTRFS_INODE_APPEND (1 << 7) 1378 #define BTRFS_INODE_NODUMP (1 << 8) 1379 #define BTRFS_INODE_NOATIME (1 << 9) 1380 #define BTRFS_INODE_DIRSYNC (1 << 10) 1381 #define BTRFS_INODE_COMPRESS (1 << 11) 1382 1383 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1384 1385 #define BTRFS_INODE_FLAG_MASK \ 1386 (BTRFS_INODE_NODATASUM | \ 1387 BTRFS_INODE_NODATACOW | \ 1388 BTRFS_INODE_READONLY | \ 1389 BTRFS_INODE_NOCOMPRESS | \ 1390 BTRFS_INODE_PREALLOC | \ 1391 BTRFS_INODE_SYNC | \ 1392 BTRFS_INODE_IMMUTABLE | \ 1393 BTRFS_INODE_APPEND | \ 1394 BTRFS_INODE_NODUMP | \ 1395 BTRFS_INODE_NOATIME | \ 1396 BTRFS_INODE_DIRSYNC | \ 1397 BTRFS_INODE_COMPRESS | \ 1398 BTRFS_INODE_ROOT_ITEM_INIT) 1399 1400 struct btrfs_map_token { 1401 struct extent_buffer *eb; 1402 char *kaddr; 1403 unsigned long offset; 1404 }; 1405 1406 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1407 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1408 1409 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1410 struct extent_buffer *eb) 1411 { 1412 token->eb = eb; 1413 token->kaddr = page_address(eb->pages[0]); 1414 token->offset = 0; 1415 } 1416 1417 /* some macros to generate set/get functions for the struct fields. This 1418 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1419 * one for u8: 1420 */ 1421 #define le8_to_cpu(v) (v) 1422 #define cpu_to_le8(v) (v) 1423 #define __le8 u8 1424 1425 static inline u8 get_unaligned_le8(const void *p) 1426 { 1427 return *(u8 *)p; 1428 } 1429 1430 static inline void put_unaligned_le8(u8 val, void *p) 1431 { 1432 *(u8 *)p = val; 1433 } 1434 1435 #define read_eb_member(eb, ptr, type, member, result) (\ 1436 read_extent_buffer(eb, (char *)(result), \ 1437 ((unsigned long)(ptr)) + \ 1438 offsetof(type, member), \ 1439 sizeof(((type *)0)->member))) 1440 1441 #define write_eb_member(eb, ptr, type, member, result) (\ 1442 write_extent_buffer(eb, (char *)(result), \ 1443 ((unsigned long)(ptr)) + \ 1444 offsetof(type, member), \ 1445 sizeof(((type *)0)->member))) 1446 1447 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1448 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1449 const void *ptr, unsigned long off); \ 1450 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1451 const void *ptr, unsigned long off, \ 1452 u##bits val); \ 1453 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1454 const void *ptr, unsigned long off); \ 1455 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1456 unsigned long off, u##bits val); 1457 1458 DECLARE_BTRFS_SETGET_BITS(8) 1459 DECLARE_BTRFS_SETGET_BITS(16) 1460 DECLARE_BTRFS_SETGET_BITS(32) 1461 DECLARE_BTRFS_SETGET_BITS(64) 1462 1463 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1464 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1465 const type *s) \ 1466 { \ 1467 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1468 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1469 } \ 1470 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1471 u##bits val) \ 1472 { \ 1473 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1474 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1475 } \ 1476 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1477 const type *s) \ 1478 { \ 1479 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1480 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1481 } \ 1482 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1483 type *s, u##bits val) \ 1484 { \ 1485 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1486 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1487 } 1488 1489 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1490 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1491 { \ 1492 const type *p = page_address(eb->pages[0]); \ 1493 return get_unaligned_le##bits(&p->member); \ 1494 } \ 1495 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1496 u##bits val) \ 1497 { \ 1498 type *p = page_address(eb->pages[0]); \ 1499 put_unaligned_le##bits(val, &p->member); \ 1500 } 1501 1502 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1503 static inline u##bits btrfs_##name(const type *s) \ 1504 { \ 1505 return get_unaligned_le##bits(&s->member); \ 1506 } \ 1507 static inline void btrfs_set_##name(type *s, u##bits val) \ 1508 { \ 1509 put_unaligned_le##bits(val, &s->member); \ 1510 } 1511 1512 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1513 struct btrfs_dev_item *s) 1514 { 1515 BUILD_BUG_ON(sizeof(u64) != 1516 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1517 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1518 total_bytes)); 1519 } 1520 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1521 struct btrfs_dev_item *s, 1522 u64 val) 1523 { 1524 BUILD_BUG_ON(sizeof(u64) != 1525 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1526 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1527 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1528 } 1529 1530 1531 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1532 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1533 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1534 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1535 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1536 start_offset, 64); 1537 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1538 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1539 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1540 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1541 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1542 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1543 1544 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1545 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1546 total_bytes, 64); 1547 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1548 bytes_used, 64); 1549 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1550 io_align, 32); 1551 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1552 io_width, 32); 1553 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1554 sector_size, 32); 1555 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1556 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1557 dev_group, 32); 1558 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1559 seek_speed, 8); 1560 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1561 bandwidth, 8); 1562 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1563 generation, 64); 1564 1565 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1566 { 1567 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1568 } 1569 1570 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1571 { 1572 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1573 } 1574 1575 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1576 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1577 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1578 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1579 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1580 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1581 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1582 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1583 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1584 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1585 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1586 1587 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1588 { 1589 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1590 } 1591 1592 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1593 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1594 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1595 stripe_len, 64); 1596 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1597 io_align, 32); 1598 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1599 io_width, 32); 1600 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1601 sector_size, 32); 1602 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1603 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1604 num_stripes, 16); 1605 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1606 sub_stripes, 16); 1607 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1608 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1609 1610 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1611 int nr) 1612 { 1613 unsigned long offset = (unsigned long)c; 1614 offset += offsetof(struct btrfs_chunk, stripe); 1615 offset += nr * sizeof(struct btrfs_stripe); 1616 return (struct btrfs_stripe *)offset; 1617 } 1618 1619 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1620 { 1621 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1622 } 1623 1624 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1625 struct btrfs_chunk *c, int nr) 1626 { 1627 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1628 } 1629 1630 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1631 struct btrfs_chunk *c, int nr) 1632 { 1633 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1634 } 1635 1636 /* struct btrfs_block_group_item */ 1637 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1638 used, 64); 1639 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1640 used, 64); 1641 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1642 struct btrfs_block_group_item, chunk_objectid, 64); 1643 1644 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1645 struct btrfs_block_group_item, chunk_objectid, 64); 1646 BTRFS_SETGET_FUNCS(block_group_flags, 1647 struct btrfs_block_group_item, flags, 64); 1648 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1649 struct btrfs_block_group_item, flags, 64); 1650 1651 /* struct btrfs_free_space_info */ 1652 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1653 extent_count, 32); 1654 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1655 1656 /* struct btrfs_inode_ref */ 1657 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1658 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1659 1660 /* struct btrfs_inode_extref */ 1661 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1662 parent_objectid, 64); 1663 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1664 name_len, 16); 1665 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1666 1667 /* struct btrfs_inode_item */ 1668 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1669 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1670 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1671 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1672 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1673 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1674 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1675 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1676 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1677 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1678 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1679 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1680 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1681 generation, 64); 1682 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1683 sequence, 64); 1684 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1685 transid, 64); 1686 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1687 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1688 nbytes, 64); 1689 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1690 block_group, 64); 1691 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1692 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1693 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1694 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1695 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1696 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1697 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1698 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1699 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1700 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1701 1702 /* struct btrfs_dev_extent */ 1703 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1704 chunk_tree, 64); 1705 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1706 chunk_objectid, 64); 1707 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1708 chunk_offset, 64); 1709 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1710 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1711 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1712 generation, 64); 1713 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1714 1715 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1716 1717 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1718 struct btrfs_tree_block_info *item, 1719 struct btrfs_disk_key *key) 1720 { 1721 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1722 } 1723 1724 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1725 struct btrfs_tree_block_info *item, 1726 struct btrfs_disk_key *key) 1727 { 1728 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1729 } 1730 1731 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1732 root, 64); 1733 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1734 objectid, 64); 1735 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1736 offset, 64); 1737 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1738 count, 32); 1739 1740 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1741 count, 32); 1742 1743 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1744 type, 8); 1745 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1746 offset, 64); 1747 1748 static inline u32 btrfs_extent_inline_ref_size(int type) 1749 { 1750 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1751 type == BTRFS_SHARED_BLOCK_REF_KEY) 1752 return sizeof(struct btrfs_extent_inline_ref); 1753 if (type == BTRFS_SHARED_DATA_REF_KEY) 1754 return sizeof(struct btrfs_shared_data_ref) + 1755 sizeof(struct btrfs_extent_inline_ref); 1756 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1757 return sizeof(struct btrfs_extent_data_ref) + 1758 offsetof(struct btrfs_extent_inline_ref, offset); 1759 return 0; 1760 } 1761 1762 /* struct btrfs_node */ 1763 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1764 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1765 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1766 blockptr, 64); 1767 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1768 generation, 64); 1769 1770 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1771 { 1772 unsigned long ptr; 1773 ptr = offsetof(struct btrfs_node, ptrs) + 1774 sizeof(struct btrfs_key_ptr) * nr; 1775 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1776 } 1777 1778 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1779 int nr, u64 val) 1780 { 1781 unsigned long ptr; 1782 ptr = offsetof(struct btrfs_node, ptrs) + 1783 sizeof(struct btrfs_key_ptr) * nr; 1784 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1785 } 1786 1787 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1788 { 1789 unsigned long ptr; 1790 ptr = offsetof(struct btrfs_node, ptrs) + 1791 sizeof(struct btrfs_key_ptr) * nr; 1792 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1793 } 1794 1795 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1796 int nr, u64 val) 1797 { 1798 unsigned long ptr; 1799 ptr = offsetof(struct btrfs_node, ptrs) + 1800 sizeof(struct btrfs_key_ptr) * nr; 1801 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1802 } 1803 1804 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1805 { 1806 return offsetof(struct btrfs_node, ptrs) + 1807 sizeof(struct btrfs_key_ptr) * nr; 1808 } 1809 1810 void btrfs_node_key(const struct extent_buffer *eb, 1811 struct btrfs_disk_key *disk_key, int nr); 1812 1813 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1814 struct btrfs_disk_key *disk_key, int nr) 1815 { 1816 unsigned long ptr; 1817 ptr = btrfs_node_key_ptr_offset(nr); 1818 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1819 struct btrfs_key_ptr, key, disk_key); 1820 } 1821 1822 /* struct btrfs_item */ 1823 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1824 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1825 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1826 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1827 1828 static inline unsigned long btrfs_item_nr_offset(int nr) 1829 { 1830 return offsetof(struct btrfs_leaf, items) + 1831 sizeof(struct btrfs_item) * nr; 1832 } 1833 1834 static inline struct btrfs_item *btrfs_item_nr(int nr) 1835 { 1836 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1837 } 1838 1839 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1840 struct btrfs_item *item) 1841 { 1842 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1843 } 1844 1845 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1846 { 1847 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1848 } 1849 1850 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1851 { 1852 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1853 } 1854 1855 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1856 { 1857 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1858 } 1859 1860 static inline void btrfs_item_key(const struct extent_buffer *eb, 1861 struct btrfs_disk_key *disk_key, int nr) 1862 { 1863 struct btrfs_item *item = btrfs_item_nr(nr); 1864 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1865 } 1866 1867 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1868 struct btrfs_disk_key *disk_key, int nr) 1869 { 1870 struct btrfs_item *item = btrfs_item_nr(nr); 1871 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1872 } 1873 1874 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1875 1876 /* 1877 * struct btrfs_root_ref 1878 */ 1879 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1880 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1881 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1882 1883 /* struct btrfs_dir_item */ 1884 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1885 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1886 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1887 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1888 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1889 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1890 data_len, 16); 1891 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1892 name_len, 16); 1893 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1894 transid, 64); 1895 1896 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1897 const struct btrfs_dir_item *item, 1898 struct btrfs_disk_key *key) 1899 { 1900 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1901 } 1902 1903 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1904 struct btrfs_dir_item *item, 1905 const struct btrfs_disk_key *key) 1906 { 1907 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1908 } 1909 1910 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1911 num_entries, 64); 1912 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1913 num_bitmaps, 64); 1914 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1915 generation, 64); 1916 1917 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1918 const struct btrfs_free_space_header *h, 1919 struct btrfs_disk_key *key) 1920 { 1921 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1922 } 1923 1924 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1925 struct btrfs_free_space_header *h, 1926 const struct btrfs_disk_key *key) 1927 { 1928 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1929 } 1930 1931 /* struct btrfs_disk_key */ 1932 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1933 objectid, 64); 1934 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1935 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1936 1937 #ifdef __LITTLE_ENDIAN 1938 1939 /* 1940 * Optimized helpers for little-endian architectures where CPU and on-disk 1941 * structures have the same endianness and we can skip conversions. 1942 */ 1943 1944 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 1945 const struct btrfs_disk_key *disk_key) 1946 { 1947 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 1948 } 1949 1950 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 1951 const struct btrfs_key *cpu_key) 1952 { 1953 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 1954 } 1955 1956 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1957 struct btrfs_key *cpu_key, int nr) 1958 { 1959 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1960 1961 btrfs_node_key(eb, disk_key, nr); 1962 } 1963 1964 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1965 struct btrfs_key *cpu_key, int nr) 1966 { 1967 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1968 1969 btrfs_item_key(eb, disk_key, nr); 1970 } 1971 1972 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1973 const struct btrfs_dir_item *item, 1974 struct btrfs_key *cpu_key) 1975 { 1976 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1977 1978 btrfs_dir_item_key(eb, item, disk_key); 1979 } 1980 1981 #else 1982 1983 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1984 const struct btrfs_disk_key *disk) 1985 { 1986 cpu->offset = le64_to_cpu(disk->offset); 1987 cpu->type = disk->type; 1988 cpu->objectid = le64_to_cpu(disk->objectid); 1989 } 1990 1991 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1992 const struct btrfs_key *cpu) 1993 { 1994 disk->offset = cpu_to_le64(cpu->offset); 1995 disk->type = cpu->type; 1996 disk->objectid = cpu_to_le64(cpu->objectid); 1997 } 1998 1999 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2000 struct btrfs_key *key, int nr) 2001 { 2002 struct btrfs_disk_key disk_key; 2003 btrfs_node_key(eb, &disk_key, nr); 2004 btrfs_disk_key_to_cpu(key, &disk_key); 2005 } 2006 2007 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2008 struct btrfs_key *key, int nr) 2009 { 2010 struct btrfs_disk_key disk_key; 2011 btrfs_item_key(eb, &disk_key, nr); 2012 btrfs_disk_key_to_cpu(key, &disk_key); 2013 } 2014 2015 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2016 const struct btrfs_dir_item *item, 2017 struct btrfs_key *key) 2018 { 2019 struct btrfs_disk_key disk_key; 2020 btrfs_dir_item_key(eb, item, &disk_key); 2021 btrfs_disk_key_to_cpu(key, &disk_key); 2022 } 2023 2024 #endif 2025 2026 /* struct btrfs_header */ 2027 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2028 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2029 generation, 64); 2030 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2031 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2032 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2033 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2034 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2035 generation, 64); 2036 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2037 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2038 nritems, 32); 2039 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2040 2041 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2042 { 2043 return (btrfs_header_flags(eb) & flag) == flag; 2044 } 2045 2046 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2047 { 2048 u64 flags = btrfs_header_flags(eb); 2049 btrfs_set_header_flags(eb, flags | flag); 2050 } 2051 2052 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2053 { 2054 u64 flags = btrfs_header_flags(eb); 2055 btrfs_set_header_flags(eb, flags & ~flag); 2056 } 2057 2058 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2059 { 2060 u64 flags = btrfs_header_flags(eb); 2061 return flags >> BTRFS_BACKREF_REV_SHIFT; 2062 } 2063 2064 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2065 int rev) 2066 { 2067 u64 flags = btrfs_header_flags(eb); 2068 flags &= ~BTRFS_BACKREF_REV_MASK; 2069 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2070 btrfs_set_header_flags(eb, flags); 2071 } 2072 2073 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2074 { 2075 return btrfs_header_level(eb) == 0; 2076 } 2077 2078 /* struct btrfs_root_item */ 2079 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2080 generation, 64); 2081 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2082 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2083 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2084 2085 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2086 generation, 64); 2087 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2088 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2089 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2090 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2091 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2092 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2093 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2094 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2095 last_snapshot, 64); 2096 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2097 generation_v2, 64); 2098 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2099 ctransid, 64); 2100 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2101 otransid, 64); 2102 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2103 stransid, 64); 2104 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2105 rtransid, 64); 2106 2107 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2108 { 2109 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2110 } 2111 2112 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2113 { 2114 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2115 } 2116 2117 /* struct btrfs_root_backup */ 2118 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2119 tree_root, 64); 2120 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2121 tree_root_gen, 64); 2122 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2123 tree_root_level, 8); 2124 2125 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2126 chunk_root, 64); 2127 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2128 chunk_root_gen, 64); 2129 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2130 chunk_root_level, 8); 2131 2132 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2133 extent_root, 64); 2134 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2135 extent_root_gen, 64); 2136 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2137 extent_root_level, 8); 2138 2139 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2140 fs_root, 64); 2141 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2142 fs_root_gen, 64); 2143 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2144 fs_root_level, 8); 2145 2146 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2147 dev_root, 64); 2148 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2149 dev_root_gen, 64); 2150 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2151 dev_root_level, 8); 2152 2153 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2154 csum_root, 64); 2155 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2156 csum_root_gen, 64); 2157 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2158 csum_root_level, 8); 2159 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2160 total_bytes, 64); 2161 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2162 bytes_used, 64); 2163 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2164 num_devices, 64); 2165 2166 /* struct btrfs_balance_item */ 2167 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2168 2169 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2170 const struct btrfs_balance_item *bi, 2171 struct btrfs_disk_balance_args *ba) 2172 { 2173 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2174 } 2175 2176 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2177 struct btrfs_balance_item *bi, 2178 const struct btrfs_disk_balance_args *ba) 2179 { 2180 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2181 } 2182 2183 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2184 const struct btrfs_balance_item *bi, 2185 struct btrfs_disk_balance_args *ba) 2186 { 2187 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2188 } 2189 2190 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2191 struct btrfs_balance_item *bi, 2192 const struct btrfs_disk_balance_args *ba) 2193 { 2194 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2195 } 2196 2197 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2198 const struct btrfs_balance_item *bi, 2199 struct btrfs_disk_balance_args *ba) 2200 { 2201 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2202 } 2203 2204 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2205 struct btrfs_balance_item *bi, 2206 const struct btrfs_disk_balance_args *ba) 2207 { 2208 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2209 } 2210 2211 static inline void 2212 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2213 const struct btrfs_disk_balance_args *disk) 2214 { 2215 memset(cpu, 0, sizeof(*cpu)); 2216 2217 cpu->profiles = le64_to_cpu(disk->profiles); 2218 cpu->usage = le64_to_cpu(disk->usage); 2219 cpu->devid = le64_to_cpu(disk->devid); 2220 cpu->pstart = le64_to_cpu(disk->pstart); 2221 cpu->pend = le64_to_cpu(disk->pend); 2222 cpu->vstart = le64_to_cpu(disk->vstart); 2223 cpu->vend = le64_to_cpu(disk->vend); 2224 cpu->target = le64_to_cpu(disk->target); 2225 cpu->flags = le64_to_cpu(disk->flags); 2226 cpu->limit = le64_to_cpu(disk->limit); 2227 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2228 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2229 } 2230 2231 static inline void 2232 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2233 const struct btrfs_balance_args *cpu) 2234 { 2235 memset(disk, 0, sizeof(*disk)); 2236 2237 disk->profiles = cpu_to_le64(cpu->profiles); 2238 disk->usage = cpu_to_le64(cpu->usage); 2239 disk->devid = cpu_to_le64(cpu->devid); 2240 disk->pstart = cpu_to_le64(cpu->pstart); 2241 disk->pend = cpu_to_le64(cpu->pend); 2242 disk->vstart = cpu_to_le64(cpu->vstart); 2243 disk->vend = cpu_to_le64(cpu->vend); 2244 disk->target = cpu_to_le64(cpu->target); 2245 disk->flags = cpu_to_le64(cpu->flags); 2246 disk->limit = cpu_to_le64(cpu->limit); 2247 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2248 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2249 } 2250 2251 /* struct btrfs_super_block */ 2252 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2253 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2254 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2255 generation, 64); 2256 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2257 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2258 struct btrfs_super_block, sys_chunk_array_size, 32); 2259 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2260 struct btrfs_super_block, chunk_root_generation, 64); 2261 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2262 root_level, 8); 2263 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2264 chunk_root, 64); 2265 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2266 chunk_root_level, 8); 2267 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2268 log_root, 64); 2269 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2270 log_root_transid, 64); 2271 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2272 log_root_level, 8); 2273 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2274 total_bytes, 64); 2275 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2276 bytes_used, 64); 2277 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2278 sectorsize, 32); 2279 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2280 nodesize, 32); 2281 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2282 stripesize, 32); 2283 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2284 root_dir_objectid, 64); 2285 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2286 num_devices, 64); 2287 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2288 compat_flags, 64); 2289 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2290 compat_ro_flags, 64); 2291 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2292 incompat_flags, 64); 2293 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2294 csum_type, 16); 2295 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2296 cache_generation, 64); 2297 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2298 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2299 uuid_tree_generation, 64); 2300 2301 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2302 const char *btrfs_super_csum_name(u16 csum_type); 2303 const char *btrfs_super_csum_driver(u16 csum_type); 2304 size_t __attribute_const__ btrfs_get_num_csums(void); 2305 2306 2307 /* 2308 * The leaf data grows from end-to-front in the node. 2309 * this returns the address of the start of the last item, 2310 * which is the stop of the leaf data stack 2311 */ 2312 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2313 { 2314 u32 nr = btrfs_header_nritems(leaf); 2315 2316 if (nr == 0) 2317 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2318 return btrfs_item_offset_nr(leaf, nr - 1); 2319 } 2320 2321 /* struct btrfs_file_extent_item */ 2322 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2323 type, 8); 2324 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2325 struct btrfs_file_extent_item, disk_bytenr, 64); 2326 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2327 struct btrfs_file_extent_item, offset, 64); 2328 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2329 struct btrfs_file_extent_item, generation, 64); 2330 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2331 struct btrfs_file_extent_item, num_bytes, 64); 2332 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2333 struct btrfs_file_extent_item, ram_bytes, 64); 2334 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2335 struct btrfs_file_extent_item, disk_num_bytes, 64); 2336 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2337 struct btrfs_file_extent_item, compression, 8); 2338 2339 static inline unsigned long 2340 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2341 { 2342 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2343 } 2344 2345 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2346 { 2347 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2348 } 2349 2350 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2351 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2352 disk_bytenr, 64); 2353 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2354 generation, 64); 2355 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2356 disk_num_bytes, 64); 2357 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2358 offset, 64); 2359 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2360 num_bytes, 64); 2361 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2362 ram_bytes, 64); 2363 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2364 compression, 8); 2365 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2366 encryption, 8); 2367 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2368 other_encoding, 16); 2369 2370 /* 2371 * this returns the number of bytes used by the item on disk, minus the 2372 * size of any extent headers. If a file is compressed on disk, this is 2373 * the compressed size 2374 */ 2375 static inline u32 btrfs_file_extent_inline_item_len( 2376 const struct extent_buffer *eb, 2377 struct btrfs_item *e) 2378 { 2379 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2380 } 2381 2382 /* btrfs_qgroup_status_item */ 2383 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2384 generation, 64); 2385 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2386 version, 64); 2387 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2388 flags, 64); 2389 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2390 rescan, 64); 2391 2392 /* btrfs_qgroup_info_item */ 2393 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2394 generation, 64); 2395 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2396 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2397 rfer_cmpr, 64); 2398 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2399 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2400 excl_cmpr, 64); 2401 2402 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2403 struct btrfs_qgroup_info_item, generation, 64); 2404 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2405 rfer, 64); 2406 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2407 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2408 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2409 excl, 64); 2410 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2411 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2412 2413 /* btrfs_qgroup_limit_item */ 2414 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2415 flags, 64); 2416 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2417 max_rfer, 64); 2418 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2419 max_excl, 64); 2420 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2421 rsv_rfer, 64); 2422 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2423 rsv_excl, 64); 2424 2425 /* btrfs_dev_replace_item */ 2426 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2427 struct btrfs_dev_replace_item, src_devid, 64); 2428 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2429 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2430 64); 2431 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2432 replace_state, 64); 2433 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2434 time_started, 64); 2435 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2436 time_stopped, 64); 2437 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2438 num_write_errors, 64); 2439 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2440 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2441 64); 2442 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2443 cursor_left, 64); 2444 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2445 cursor_right, 64); 2446 2447 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2448 struct btrfs_dev_replace_item, src_devid, 64); 2449 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2450 struct btrfs_dev_replace_item, 2451 cont_reading_from_srcdev_mode, 64); 2452 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2453 struct btrfs_dev_replace_item, replace_state, 64); 2454 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2455 struct btrfs_dev_replace_item, time_started, 64); 2456 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2457 struct btrfs_dev_replace_item, time_stopped, 64); 2458 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2459 struct btrfs_dev_replace_item, num_write_errors, 64); 2460 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2461 struct btrfs_dev_replace_item, 2462 num_uncorrectable_read_errors, 64); 2463 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2464 struct btrfs_dev_replace_item, cursor_left, 64); 2465 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2466 struct btrfs_dev_replace_item, cursor_right, 64); 2467 2468 /* helper function to cast into the data area of the leaf. */ 2469 #define btrfs_item_ptr(leaf, slot, type) \ 2470 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2471 btrfs_item_offset_nr(leaf, slot))) 2472 2473 #define btrfs_item_ptr_offset(leaf, slot) \ 2474 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2475 btrfs_item_offset_nr(leaf, slot))) 2476 2477 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2478 { 2479 return crc32c(crc, address, length); 2480 } 2481 2482 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2483 { 2484 put_unaligned_le32(~crc, result); 2485 } 2486 2487 static inline u64 btrfs_name_hash(const char *name, int len) 2488 { 2489 return crc32c((u32)~1, name, len); 2490 } 2491 2492 /* 2493 * Figure the key offset of an extended inode ref 2494 */ 2495 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2496 int len) 2497 { 2498 return (u64) crc32c(parent_objectid, name, len); 2499 } 2500 2501 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2502 { 2503 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2504 } 2505 2506 /* extent-tree.c */ 2507 2508 enum btrfs_inline_ref_type { 2509 BTRFS_REF_TYPE_INVALID, 2510 BTRFS_REF_TYPE_BLOCK, 2511 BTRFS_REF_TYPE_DATA, 2512 BTRFS_REF_TYPE_ANY, 2513 }; 2514 2515 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2516 struct btrfs_extent_inline_ref *iref, 2517 enum btrfs_inline_ref_type is_data); 2518 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2519 2520 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2521 2522 /* 2523 * Use this if we would be adding new items, as we could split nodes as we cow 2524 * down the tree. 2525 */ 2526 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2527 unsigned num_items) 2528 { 2529 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2530 } 2531 2532 /* 2533 * Doing a truncate or a modification won't result in new nodes or leaves, just 2534 * what we need for COW. 2535 */ 2536 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2537 unsigned num_items) 2538 { 2539 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2540 } 2541 2542 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2543 u64 start, u64 num_bytes); 2544 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2545 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2546 unsigned long count); 2547 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2548 struct btrfs_delayed_ref_root *delayed_refs, 2549 struct btrfs_delayed_ref_head *head); 2550 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2551 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2552 struct btrfs_fs_info *fs_info, u64 bytenr, 2553 u64 offset, int metadata, u64 *refs, u64 *flags); 2554 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2555 int reserved); 2556 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2557 u64 bytenr, u64 num_bytes); 2558 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2559 int btrfs_cross_ref_exist(struct btrfs_root *root, 2560 u64 objectid, u64 offset, u64 bytenr, bool strict); 2561 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2562 struct btrfs_root *root, 2563 u64 parent, u64 root_objectid, 2564 const struct btrfs_disk_key *key, 2565 int level, u64 hint, 2566 u64 empty_size, 2567 enum btrfs_lock_nesting nest); 2568 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2569 struct btrfs_root *root, 2570 struct extent_buffer *buf, 2571 u64 parent, int last_ref); 2572 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2573 struct btrfs_root *root, u64 owner, 2574 u64 offset, u64 ram_bytes, 2575 struct btrfs_key *ins); 2576 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2577 u64 root_objectid, u64 owner, u64 offset, 2578 struct btrfs_key *ins); 2579 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2580 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2581 struct btrfs_key *ins, int is_data, int delalloc); 2582 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2583 struct extent_buffer *buf, int full_backref); 2584 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2585 struct extent_buffer *buf, int full_backref); 2586 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2587 struct extent_buffer *eb, u64 flags, 2588 int level, int is_data); 2589 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2590 2591 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2592 u64 start, u64 len, int delalloc); 2593 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2594 u64 len); 2595 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2596 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2597 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2598 struct btrfs_ref *generic_ref); 2599 2600 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2601 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2602 2603 /* 2604 * Different levels for to flush space when doing space reservations. 2605 * 2606 * The higher the level, the more methods we try to reclaim space. 2607 */ 2608 enum btrfs_reserve_flush_enum { 2609 /* If we are in the transaction, we can't flush anything.*/ 2610 BTRFS_RESERVE_NO_FLUSH, 2611 2612 /* 2613 * Flush space by: 2614 * - Running delayed inode items 2615 * - Allocating a new chunk 2616 */ 2617 BTRFS_RESERVE_FLUSH_LIMIT, 2618 2619 /* 2620 * Flush space by: 2621 * - Running delayed inode items 2622 * - Running delayed refs 2623 * - Running delalloc and waiting for ordered extents 2624 * - Allocating a new chunk 2625 */ 2626 BTRFS_RESERVE_FLUSH_EVICT, 2627 2628 /* 2629 * Flush space by above mentioned methods and by: 2630 * - Running delayed iputs 2631 * - Commiting transaction 2632 * 2633 * Can be interruped by fatal signal. 2634 */ 2635 BTRFS_RESERVE_FLUSH_DATA, 2636 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2637 BTRFS_RESERVE_FLUSH_ALL, 2638 2639 /* 2640 * Pretty much the same as FLUSH_ALL, but can also steal space from 2641 * global rsv. 2642 * 2643 * Can be interruped by fatal signal. 2644 */ 2645 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2646 }; 2647 2648 enum btrfs_flush_state { 2649 FLUSH_DELAYED_ITEMS_NR = 1, 2650 FLUSH_DELAYED_ITEMS = 2, 2651 FLUSH_DELAYED_REFS_NR = 3, 2652 FLUSH_DELAYED_REFS = 4, 2653 FLUSH_DELALLOC = 5, 2654 FLUSH_DELALLOC_WAIT = 6, 2655 ALLOC_CHUNK = 7, 2656 ALLOC_CHUNK_FORCE = 8, 2657 RUN_DELAYED_IPUTS = 9, 2658 COMMIT_TRANS = 10, 2659 }; 2660 2661 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2662 struct btrfs_block_rsv *rsv, 2663 int nitems, bool use_global_rsv); 2664 void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2665 struct btrfs_block_rsv *rsv); 2666 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2667 2668 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2669 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2670 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2671 u64 start, u64 end); 2672 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2673 u64 num_bytes, u64 *actual_bytes); 2674 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2675 2676 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2677 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2678 struct btrfs_fs_info *fs_info); 2679 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2680 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2681 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2682 2683 /* ctree.c */ 2684 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2685 int *slot); 2686 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2687 int btrfs_previous_item(struct btrfs_root *root, 2688 struct btrfs_path *path, u64 min_objectid, 2689 int type); 2690 int btrfs_previous_extent_item(struct btrfs_root *root, 2691 struct btrfs_path *path, u64 min_objectid); 2692 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2693 struct btrfs_path *path, 2694 const struct btrfs_key *new_key); 2695 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2696 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2697 struct btrfs_key *key, int lowest_level, 2698 u64 min_trans); 2699 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2700 struct btrfs_path *path, 2701 u64 min_trans); 2702 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2703 int slot); 2704 2705 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2706 struct btrfs_root *root, struct extent_buffer *buf, 2707 struct extent_buffer *parent, int parent_slot, 2708 struct extent_buffer **cow_ret, 2709 enum btrfs_lock_nesting nest); 2710 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2711 struct btrfs_root *root, 2712 struct extent_buffer *buf, 2713 struct extent_buffer **cow_ret, u64 new_root_objectid); 2714 int btrfs_block_can_be_shared(struct btrfs_root *root, 2715 struct extent_buffer *buf); 2716 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2717 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2718 int btrfs_split_item(struct btrfs_trans_handle *trans, 2719 struct btrfs_root *root, 2720 struct btrfs_path *path, 2721 const struct btrfs_key *new_key, 2722 unsigned long split_offset); 2723 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2724 struct btrfs_root *root, 2725 struct btrfs_path *path, 2726 const struct btrfs_key *new_key); 2727 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2728 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2729 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2730 const struct btrfs_key *key, struct btrfs_path *p, 2731 int ins_len, int cow); 2732 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2733 struct btrfs_path *p, u64 time_seq); 2734 int btrfs_search_slot_for_read(struct btrfs_root *root, 2735 const struct btrfs_key *key, 2736 struct btrfs_path *p, int find_higher, 2737 int return_any); 2738 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2739 struct btrfs_root *root, struct extent_buffer *parent, 2740 int start_slot, u64 *last_ret, 2741 struct btrfs_key *progress); 2742 void btrfs_release_path(struct btrfs_path *p); 2743 struct btrfs_path *btrfs_alloc_path(void); 2744 void btrfs_free_path(struct btrfs_path *p); 2745 2746 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2747 struct btrfs_path *path, int slot, int nr); 2748 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2749 struct btrfs_root *root, 2750 struct btrfs_path *path) 2751 { 2752 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2753 } 2754 2755 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2756 const struct btrfs_key *cpu_key, u32 *data_size, 2757 int nr); 2758 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2759 const struct btrfs_key *key, void *data, u32 data_size); 2760 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2761 struct btrfs_root *root, 2762 struct btrfs_path *path, 2763 const struct btrfs_key *cpu_key, u32 *data_size, 2764 int nr); 2765 2766 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2767 struct btrfs_root *root, 2768 struct btrfs_path *path, 2769 const struct btrfs_key *key, 2770 u32 data_size) 2771 { 2772 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2773 } 2774 2775 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2776 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2777 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2778 u64 time_seq); 2779 static inline int btrfs_next_old_item(struct btrfs_root *root, 2780 struct btrfs_path *p, u64 time_seq) 2781 { 2782 ++p->slots[0]; 2783 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2784 return btrfs_next_old_leaf(root, p, time_seq); 2785 return 0; 2786 } 2787 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2788 { 2789 return btrfs_next_old_item(root, p, 0); 2790 } 2791 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2792 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2793 int for_reloc); 2794 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2795 struct btrfs_root *root, 2796 struct extent_buffer *node, 2797 struct extent_buffer *parent); 2798 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2799 { 2800 /* 2801 * Do it this way so we only ever do one test_bit in the normal case. 2802 */ 2803 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2804 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2805 return 2; 2806 return 1; 2807 } 2808 return 0; 2809 } 2810 2811 /* 2812 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2813 * anything except sleeping. This function is used to check the status of 2814 * the fs. 2815 */ 2816 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2817 { 2818 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2819 } 2820 2821 /* tree mod log functions from ctree.c */ 2822 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2823 struct seq_list *elem); 2824 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2825 struct seq_list *elem); 2826 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2827 2828 /* root-item.c */ 2829 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2830 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2831 int name_len); 2832 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2833 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2834 int name_len); 2835 int btrfs_del_root(struct btrfs_trans_handle *trans, 2836 const struct btrfs_key *key); 2837 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2838 const struct btrfs_key *key, 2839 struct btrfs_root_item *item); 2840 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2841 struct btrfs_root *root, 2842 struct btrfs_key *key, 2843 struct btrfs_root_item *item); 2844 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2845 struct btrfs_path *path, struct btrfs_root_item *root_item, 2846 struct btrfs_key *root_key); 2847 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2848 void btrfs_set_root_node(struct btrfs_root_item *item, 2849 struct extent_buffer *node); 2850 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2851 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2852 struct btrfs_root *root); 2853 2854 /* uuid-tree.c */ 2855 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2856 u64 subid); 2857 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2858 u64 subid); 2859 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2860 2861 /* dir-item.c */ 2862 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2863 const char *name, int name_len); 2864 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2865 int name_len, struct btrfs_inode *dir, 2866 struct btrfs_key *location, u8 type, u64 index); 2867 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2868 struct btrfs_root *root, 2869 struct btrfs_path *path, u64 dir, 2870 const char *name, int name_len, 2871 int mod); 2872 struct btrfs_dir_item * 2873 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2874 struct btrfs_root *root, 2875 struct btrfs_path *path, u64 dir, 2876 u64 objectid, const char *name, int name_len, 2877 int mod); 2878 struct btrfs_dir_item * 2879 btrfs_search_dir_index_item(struct btrfs_root *root, 2880 struct btrfs_path *path, u64 dirid, 2881 const char *name, int name_len); 2882 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2883 struct btrfs_root *root, 2884 struct btrfs_path *path, 2885 struct btrfs_dir_item *di); 2886 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2887 struct btrfs_root *root, 2888 struct btrfs_path *path, u64 objectid, 2889 const char *name, u16 name_len, 2890 const void *data, u16 data_len); 2891 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2892 struct btrfs_root *root, 2893 struct btrfs_path *path, u64 dir, 2894 const char *name, u16 name_len, 2895 int mod); 2896 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2897 struct btrfs_path *path, 2898 const char *name, 2899 int name_len); 2900 2901 /* orphan.c */ 2902 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2903 struct btrfs_root *root, u64 offset); 2904 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2905 struct btrfs_root *root, u64 offset); 2906 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2907 2908 /* inode-item.c */ 2909 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2910 struct btrfs_root *root, 2911 const char *name, int name_len, 2912 u64 inode_objectid, u64 ref_objectid, u64 index); 2913 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2914 struct btrfs_root *root, 2915 const char *name, int name_len, 2916 u64 inode_objectid, u64 ref_objectid, u64 *index); 2917 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2918 struct btrfs_root *root, 2919 struct btrfs_path *path, u64 objectid); 2920 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2921 *root, struct btrfs_path *path, 2922 struct btrfs_key *location, int mod); 2923 2924 struct btrfs_inode_extref * 2925 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2926 struct btrfs_root *root, 2927 struct btrfs_path *path, 2928 const char *name, int name_len, 2929 u64 inode_objectid, u64 ref_objectid, int ins_len, 2930 int cow); 2931 2932 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2933 int slot, const char *name, 2934 int name_len); 2935 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2936 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2937 const char *name, int name_len); 2938 /* file-item.c */ 2939 struct btrfs_dio_private; 2940 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2941 struct btrfs_root *root, u64 bytenr, u64 len); 2942 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2943 u64 offset, u8 *dst); 2944 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2945 struct btrfs_root *root, 2946 u64 objectid, u64 pos, 2947 u64 disk_offset, u64 disk_num_bytes, 2948 u64 num_bytes, u64 offset, u64 ram_bytes, 2949 u8 compression, u8 encryption, u16 other_encoding); 2950 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2951 struct btrfs_root *root, 2952 struct btrfs_path *path, u64 objectid, 2953 u64 bytenr, int mod); 2954 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2955 struct btrfs_root *root, 2956 struct btrfs_ordered_sum *sums); 2957 blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 2958 u64 file_start, int contig); 2959 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2960 struct list_head *list, int search_commit); 2961 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2962 const struct btrfs_path *path, 2963 struct btrfs_file_extent_item *fi, 2964 const bool new_inline, 2965 struct extent_map *em); 2966 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 2967 u64 len); 2968 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 2969 u64 len); 2970 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size); 2971 u64 btrfs_file_extent_end(const struct btrfs_path *path); 2972 2973 /* inode.c */ 2974 blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 2975 int mirror_num, unsigned long bio_flags); 2976 int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u64 phy_offset, 2977 struct page *page, u64 start, u64 end, int mirror); 2978 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2979 u64 start, u64 len); 2980 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2981 u64 *orig_start, u64 *orig_block_len, 2982 u64 *ram_bytes, bool strict); 2983 2984 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2985 struct btrfs_inode *inode); 2986 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2987 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2988 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2989 struct btrfs_root *root, 2990 struct btrfs_inode *dir, struct btrfs_inode *inode, 2991 const char *name, int name_len); 2992 int btrfs_add_link(struct btrfs_trans_handle *trans, 2993 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2994 const char *name, int name_len, int add_backref, u64 index); 2995 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2996 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2997 int front); 2998 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2999 struct btrfs_root *root, 3000 struct inode *inode, u64 new_size, 3001 u32 min_type); 3002 3003 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3004 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr); 3005 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3006 unsigned int extra_bits, 3007 struct extent_state **cached_state); 3008 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3009 struct btrfs_root *new_root, 3010 struct btrfs_root *parent_root, 3011 u64 new_dirid); 3012 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3013 unsigned *bits); 3014 void btrfs_clear_delalloc_extent(struct inode *inode, 3015 struct extent_state *state, unsigned *bits); 3016 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3017 struct extent_state *other); 3018 void btrfs_split_delalloc_extent(struct inode *inode, 3019 struct extent_state *orig, u64 split); 3020 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3021 unsigned long bio_flags); 3022 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3023 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3024 int btrfs_readpage(struct file *file, struct page *page); 3025 void btrfs_evict_inode(struct inode *inode); 3026 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3027 struct inode *btrfs_alloc_inode(struct super_block *sb); 3028 void btrfs_destroy_inode(struct inode *inode); 3029 void btrfs_free_inode(struct inode *inode); 3030 int btrfs_drop_inode(struct inode *inode); 3031 int __init btrfs_init_cachep(void); 3032 void __cold btrfs_destroy_cachep(void); 3033 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3034 struct btrfs_root *root, struct btrfs_path *path); 3035 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3036 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3037 struct page *page, size_t pg_offset, 3038 u64 start, u64 end); 3039 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3040 struct btrfs_root *root, 3041 struct inode *inode); 3042 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3043 struct btrfs_root *root, struct inode *inode); 3044 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3045 struct btrfs_inode *inode); 3046 int btrfs_orphan_cleanup(struct btrfs_root *root); 3047 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3048 void btrfs_add_delayed_iput(struct inode *inode); 3049 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3050 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3051 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3052 u64 start, u64 num_bytes, u64 min_size, 3053 loff_t actual_len, u64 *alloc_hint); 3054 int btrfs_prealloc_file_range_trans(struct inode *inode, 3055 struct btrfs_trans_handle *trans, int mode, 3056 u64 start, u64 num_bytes, u64 min_size, 3057 loff_t actual_len, u64 *alloc_hint); 3058 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3059 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3060 struct writeback_control *wbc); 3061 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3062 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3063 u64 end, int uptodate); 3064 extern const struct dentry_operations btrfs_dentry_operations; 3065 ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter); 3066 3067 /* ioctl.c */ 3068 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3069 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3070 int btrfs_ioctl_get_supported_features(void __user *arg); 3071 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3072 int __pure btrfs_is_empty_uuid(u8 *uuid); 3073 int btrfs_defrag_file(struct inode *inode, struct file *file, 3074 struct btrfs_ioctl_defrag_range_args *range, 3075 u64 newer_than, unsigned long max_pages); 3076 void btrfs_get_block_group_info(struct list_head *groups_list, 3077 struct btrfs_ioctl_space_info *space); 3078 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3079 struct btrfs_ioctl_balance_args *bargs); 3080 bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3081 enum btrfs_exclusive_operation type); 3082 void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3083 3084 /* file.c */ 3085 int __init btrfs_auto_defrag_init(void); 3086 void __cold btrfs_auto_defrag_exit(void); 3087 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3088 struct btrfs_inode *inode); 3089 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3090 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3091 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3092 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3093 int skip_pinned); 3094 extern const struct file_operations btrfs_file_operations; 3095 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3096 struct btrfs_root *root, struct btrfs_inode *inode, 3097 struct btrfs_path *path, u64 start, u64 end, 3098 u64 *drop_end, int drop_cache, 3099 int replace_extent, 3100 u32 extent_item_size, 3101 int *key_inserted); 3102 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3103 struct btrfs_root *root, struct inode *inode, u64 start, 3104 u64 end, int drop_cache); 3105 int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path, 3106 const u64 start, const u64 end, 3107 struct btrfs_replace_extent_info *extent_info, 3108 struct btrfs_trans_handle **trans_out); 3109 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3110 struct btrfs_inode *inode, u64 start, u64 end); 3111 int btrfs_release_file(struct inode *inode, struct file *file); 3112 int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3113 size_t num_pages, loff_t pos, size_t write_bytes, 3114 struct extent_state **cached); 3115 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3116 int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3117 size_t *write_bytes); 3118 void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3119 3120 /* tree-defrag.c */ 3121 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3122 struct btrfs_root *root); 3123 3124 /* super.c */ 3125 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3126 unsigned long new_flags); 3127 int btrfs_sync_fs(struct super_block *sb, int wait); 3128 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3129 u64 subvol_objectid); 3130 3131 static inline __printf(2, 3) __cold 3132 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3133 { 3134 } 3135 3136 #ifdef CONFIG_PRINTK 3137 __printf(2, 3) 3138 __cold 3139 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3140 #else 3141 #define btrfs_printk(fs_info, fmt, args...) \ 3142 btrfs_no_printk(fs_info, fmt, ##args) 3143 #endif 3144 3145 #define btrfs_emerg(fs_info, fmt, args...) \ 3146 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3147 #define btrfs_alert(fs_info, fmt, args...) \ 3148 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3149 #define btrfs_crit(fs_info, fmt, args...) \ 3150 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3151 #define btrfs_err(fs_info, fmt, args...) \ 3152 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3153 #define btrfs_warn(fs_info, fmt, args...) \ 3154 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3155 #define btrfs_notice(fs_info, fmt, args...) \ 3156 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3157 #define btrfs_info(fs_info, fmt, args...) \ 3158 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3159 3160 /* 3161 * Wrappers that use printk_in_rcu 3162 */ 3163 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3164 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3165 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3166 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3167 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3168 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3169 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3170 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3171 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3172 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3173 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3174 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3175 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3176 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3177 3178 /* 3179 * Wrappers that use a ratelimited printk_in_rcu 3180 */ 3181 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3182 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3183 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3184 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3185 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3186 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3187 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3188 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3189 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3190 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3191 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3192 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3193 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3194 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3195 3196 /* 3197 * Wrappers that use a ratelimited printk 3198 */ 3199 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3200 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3201 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3202 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3203 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3204 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3205 #define btrfs_err_rl(fs_info, fmt, args...) \ 3206 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3207 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3208 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3209 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3210 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3211 #define btrfs_info_rl(fs_info, fmt, args...) \ 3212 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3213 3214 #if defined(CONFIG_DYNAMIC_DEBUG) 3215 #define btrfs_debug(fs_info, fmt, args...) \ 3216 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3217 fs_info, KERN_DEBUG fmt, ##args) 3218 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3219 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3220 fs_info, KERN_DEBUG fmt, ##args) 3221 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3222 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3223 fs_info, KERN_DEBUG fmt, ##args) 3224 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3225 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3226 fs_info, KERN_DEBUG fmt, ##args) 3227 #elif defined(DEBUG) 3228 #define btrfs_debug(fs_info, fmt, args...) \ 3229 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3230 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3231 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3232 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3233 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3234 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3235 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3236 #else 3237 #define btrfs_debug(fs_info, fmt, args...) \ 3238 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3239 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3240 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3241 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3242 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3243 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3244 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3245 #endif 3246 3247 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3248 do { \ 3249 rcu_read_lock(); \ 3250 btrfs_printk(fs_info, fmt, ##args); \ 3251 rcu_read_unlock(); \ 3252 } while (0) 3253 3254 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3255 do { \ 3256 rcu_read_lock(); \ 3257 btrfs_no_printk(fs_info, fmt, ##args); \ 3258 rcu_read_unlock(); \ 3259 } while (0) 3260 3261 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3262 do { \ 3263 static DEFINE_RATELIMIT_STATE(_rs, \ 3264 DEFAULT_RATELIMIT_INTERVAL, \ 3265 DEFAULT_RATELIMIT_BURST); \ 3266 if (__ratelimit(&_rs)) \ 3267 btrfs_printk(fs_info, fmt, ##args); \ 3268 } while (0) 3269 3270 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3271 do { \ 3272 rcu_read_lock(); \ 3273 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3274 rcu_read_unlock(); \ 3275 } while (0) 3276 3277 #ifdef CONFIG_BTRFS_ASSERT 3278 __cold __noreturn 3279 static inline void assertfail(const char *expr, const char *file, int line) 3280 { 3281 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3282 BUG(); 3283 } 3284 3285 #define ASSERT(expr) \ 3286 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3287 3288 #else 3289 static inline void assertfail(const char *expr, const char* file, int line) { } 3290 #define ASSERT(expr) (void)(expr) 3291 #endif 3292 3293 /* 3294 * Use that for functions that are conditionally exported for sanity tests but 3295 * otherwise static 3296 */ 3297 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3298 #define EXPORT_FOR_TESTS static 3299 #else 3300 #define EXPORT_FOR_TESTS 3301 #endif 3302 3303 __cold 3304 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3305 { 3306 btrfs_err(fs_info, 3307 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3308 } 3309 3310 __printf(5, 6) 3311 __cold 3312 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3313 unsigned int line, int errno, const char *fmt, ...); 3314 3315 const char * __attribute_const__ btrfs_decode_error(int errno); 3316 3317 __cold 3318 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3319 const char *function, 3320 unsigned int line, int errno); 3321 3322 /* 3323 * Call btrfs_abort_transaction as early as possible when an error condition is 3324 * detected, that way the exact line number is reported. 3325 */ 3326 #define btrfs_abort_transaction(trans, errno) \ 3327 do { \ 3328 /* Report first abort since mount */ \ 3329 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3330 &((trans)->fs_info->fs_state))) { \ 3331 if ((errno) != -EIO && (errno) != -EROFS) { \ 3332 WARN(1, KERN_DEBUG \ 3333 "BTRFS: Transaction aborted (error %d)\n", \ 3334 (errno)); \ 3335 } else { \ 3336 btrfs_debug((trans)->fs_info, \ 3337 "Transaction aborted (error %d)", \ 3338 (errno)); \ 3339 } \ 3340 } \ 3341 __btrfs_abort_transaction((trans), __func__, \ 3342 __LINE__, (errno)); \ 3343 } while (0) 3344 3345 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3346 do { \ 3347 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3348 (errno), fmt, ##args); \ 3349 } while (0) 3350 3351 __printf(5, 6) 3352 __cold 3353 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3354 unsigned int line, int errno, const char *fmt, ...); 3355 /* 3356 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3357 * will panic(). Otherwise we BUG() here. 3358 */ 3359 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3360 do { \ 3361 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3362 BUG(); \ 3363 } while (0) 3364 3365 3366 /* compatibility and incompatibility defines */ 3367 3368 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3369 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3370 #opt) 3371 3372 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3373 u64 flag, const char* name) 3374 { 3375 struct btrfs_super_block *disk_super; 3376 u64 features; 3377 3378 disk_super = fs_info->super_copy; 3379 features = btrfs_super_incompat_flags(disk_super); 3380 if (!(features & flag)) { 3381 spin_lock(&fs_info->super_lock); 3382 features = btrfs_super_incompat_flags(disk_super); 3383 if (!(features & flag)) { 3384 features |= flag; 3385 btrfs_set_super_incompat_flags(disk_super, features); 3386 btrfs_info(fs_info, 3387 "setting incompat feature flag for %s (0x%llx)", 3388 name, flag); 3389 } 3390 spin_unlock(&fs_info->super_lock); 3391 } 3392 } 3393 3394 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3395 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3396 #opt) 3397 3398 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3399 u64 flag, const char* name) 3400 { 3401 struct btrfs_super_block *disk_super; 3402 u64 features; 3403 3404 disk_super = fs_info->super_copy; 3405 features = btrfs_super_incompat_flags(disk_super); 3406 if (features & flag) { 3407 spin_lock(&fs_info->super_lock); 3408 features = btrfs_super_incompat_flags(disk_super); 3409 if (features & flag) { 3410 features &= ~flag; 3411 btrfs_set_super_incompat_flags(disk_super, features); 3412 btrfs_info(fs_info, 3413 "clearing incompat feature flag for %s (0x%llx)", 3414 name, flag); 3415 } 3416 spin_unlock(&fs_info->super_lock); 3417 } 3418 } 3419 3420 #define btrfs_fs_incompat(fs_info, opt) \ 3421 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3422 3423 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3424 { 3425 struct btrfs_super_block *disk_super; 3426 disk_super = fs_info->super_copy; 3427 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3428 } 3429 3430 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3431 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3432 #opt) 3433 3434 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3435 u64 flag, const char *name) 3436 { 3437 struct btrfs_super_block *disk_super; 3438 u64 features; 3439 3440 disk_super = fs_info->super_copy; 3441 features = btrfs_super_compat_ro_flags(disk_super); 3442 if (!(features & flag)) { 3443 spin_lock(&fs_info->super_lock); 3444 features = btrfs_super_compat_ro_flags(disk_super); 3445 if (!(features & flag)) { 3446 features |= flag; 3447 btrfs_set_super_compat_ro_flags(disk_super, features); 3448 btrfs_info(fs_info, 3449 "setting compat-ro feature flag for %s (0x%llx)", 3450 name, flag); 3451 } 3452 spin_unlock(&fs_info->super_lock); 3453 } 3454 } 3455 3456 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3457 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3458 #opt) 3459 3460 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3461 u64 flag, const char *name) 3462 { 3463 struct btrfs_super_block *disk_super; 3464 u64 features; 3465 3466 disk_super = fs_info->super_copy; 3467 features = btrfs_super_compat_ro_flags(disk_super); 3468 if (features & flag) { 3469 spin_lock(&fs_info->super_lock); 3470 features = btrfs_super_compat_ro_flags(disk_super); 3471 if (features & flag) { 3472 features &= ~flag; 3473 btrfs_set_super_compat_ro_flags(disk_super, features); 3474 btrfs_info(fs_info, 3475 "clearing compat-ro feature flag for %s (0x%llx)", 3476 name, flag); 3477 } 3478 spin_unlock(&fs_info->super_lock); 3479 } 3480 } 3481 3482 #define btrfs_fs_compat_ro(fs_info, opt) \ 3483 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3484 3485 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3486 { 3487 struct btrfs_super_block *disk_super; 3488 disk_super = fs_info->super_copy; 3489 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3490 } 3491 3492 /* acl.c */ 3493 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3494 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3495 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3496 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3497 struct inode *inode, struct inode *dir); 3498 #else 3499 #define btrfs_get_acl NULL 3500 #define btrfs_set_acl NULL 3501 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3502 struct inode *inode, struct inode *dir) 3503 { 3504 return 0; 3505 } 3506 #endif 3507 3508 /* relocation.c */ 3509 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3510 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3511 struct btrfs_root *root); 3512 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3513 struct btrfs_root *root); 3514 int btrfs_recover_relocation(struct btrfs_root *root); 3515 int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3516 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3517 struct btrfs_root *root, struct extent_buffer *buf, 3518 struct extent_buffer *cow); 3519 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3520 u64 *bytes_to_reserve); 3521 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3522 struct btrfs_pending_snapshot *pending); 3523 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3524 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3525 u64 bytenr); 3526 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3527 3528 /* scrub.c */ 3529 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3530 u64 end, struct btrfs_scrub_progress *progress, 3531 int readonly, int is_dev_replace); 3532 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3533 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3534 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3535 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3536 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3537 struct btrfs_scrub_progress *progress); 3538 static inline void btrfs_init_full_stripe_locks_tree( 3539 struct btrfs_full_stripe_locks_tree *locks_root) 3540 { 3541 locks_root->root = RB_ROOT; 3542 mutex_init(&locks_root->lock); 3543 } 3544 3545 /* dev-replace.c */ 3546 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3547 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3548 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3549 3550 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3551 { 3552 btrfs_bio_counter_sub(fs_info, 1); 3553 } 3554 3555 /* reada.c */ 3556 struct reada_control { 3557 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3558 struct btrfs_key key_start; 3559 struct btrfs_key key_end; /* exclusive */ 3560 atomic_t elems; 3561 struct kref refcnt; 3562 wait_queue_head_t wait; 3563 }; 3564 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3565 struct btrfs_key *start, struct btrfs_key *end); 3566 int btrfs_reada_wait(void *handle); 3567 void btrfs_reada_detach(void *handle); 3568 int btree_readahead_hook(struct extent_buffer *eb, int err); 3569 void btrfs_reada_remove_dev(struct btrfs_device *dev); 3570 void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3571 3572 static inline int is_fstree(u64 rootid) 3573 { 3574 if (rootid == BTRFS_FS_TREE_OBJECTID || 3575 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3576 !btrfs_qgroup_level(rootid))) 3577 return 1; 3578 return 0; 3579 } 3580 3581 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3582 { 3583 return signal_pending(current); 3584 } 3585 3586 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3587 3588 /* Sanity test specific functions */ 3589 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3590 void btrfs_test_destroy_inode(struct inode *inode); 3591 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3592 { 3593 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3594 } 3595 #else 3596 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3597 { 3598 return 0; 3599 } 3600 #endif 3601 3602 #endif 3603