1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <trace/events/btrfs.h> 20 #include <asm/kmap_types.h> 21 #include <asm/unaligned.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 #include "block-rsv.h" 35 36 struct btrfs_trans_handle; 37 struct btrfs_transaction; 38 struct btrfs_pending_snapshot; 39 struct btrfs_delayed_ref_root; 40 struct btrfs_space_info; 41 struct btrfs_block_group_cache; 42 extern struct kmem_cache *btrfs_trans_handle_cachep; 43 extern struct kmem_cache *btrfs_bit_radix_cachep; 44 extern struct kmem_cache *btrfs_path_cachep; 45 extern struct kmem_cache *btrfs_free_space_cachep; 46 extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 47 struct btrfs_ordered_sum; 48 struct btrfs_ref; 49 50 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 51 52 /* 53 * Maximum number of mirrors that can be available for all profiles counting 54 * the target device of dev-replace as one. During an active device replace 55 * procedure, the target device of the copy operation is a mirror for the 56 * filesystem data as well that can be used to read data in order to repair 57 * read errors on other disks. 58 * 59 * Current value is derived from RAID1 with 2 copies. 60 */ 61 #define BTRFS_MAX_MIRRORS (2 + 1) 62 63 #define BTRFS_MAX_LEVEL 8 64 65 #define BTRFS_OLDEST_GENERATION 0ULL 66 67 /* 68 * the max metadata block size. This limit is somewhat artificial, 69 * but the memmove costs go through the roof for larger blocks. 70 */ 71 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 72 73 /* 74 * we can actually store much bigger names, but lets not confuse the rest 75 * of linux 76 */ 77 #define BTRFS_NAME_LEN 255 78 79 /* 80 * Theoretical limit is larger, but we keep this down to a sane 81 * value. That should limit greatly the possibility of collisions on 82 * inode ref items. 83 */ 84 #define BTRFS_LINK_MAX 65535U 85 86 #define BTRFS_EMPTY_DIR_SIZE 0 87 88 /* ioprio of readahead is set to idle */ 89 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 90 91 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 92 93 /* 94 * Use large batch size to reduce overhead of metadata updates. On the reader 95 * side, we only read it when we are close to ENOSPC and the read overhead is 96 * mostly related to the number of CPUs, so it is OK to use arbitrary large 97 * value here. 98 */ 99 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 100 101 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 102 103 104 /* 105 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 106 */ 107 static inline u32 count_max_extents(u64 size) 108 { 109 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 110 } 111 112 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 113 { 114 BUG_ON(num_stripes == 0); 115 return sizeof(struct btrfs_chunk) + 116 sizeof(struct btrfs_stripe) * (num_stripes - 1); 117 } 118 119 /* 120 * Runtime (in-memory) states of filesystem 121 */ 122 enum { 123 /* Global indicator of serious filesystem errors */ 124 BTRFS_FS_STATE_ERROR, 125 /* 126 * Filesystem is being remounted, allow to skip some operations, like 127 * defrag 128 */ 129 BTRFS_FS_STATE_REMOUNTING, 130 /* Track if a transaction abort has been reported on this filesystem */ 131 BTRFS_FS_STATE_TRANS_ABORTED, 132 /* 133 * Bio operations should be blocked on this filesystem because a source 134 * or target device is being destroyed as part of a device replace 135 */ 136 BTRFS_FS_STATE_DEV_REPLACING, 137 /* The btrfs_fs_info created for self-tests */ 138 BTRFS_FS_STATE_DUMMY_FS_INFO, 139 }; 140 141 #define BTRFS_BACKREF_REV_MAX 256 142 #define BTRFS_BACKREF_REV_SHIFT 56 143 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 144 BTRFS_BACKREF_REV_SHIFT) 145 146 #define BTRFS_OLD_BACKREF_REV 0 147 #define BTRFS_MIXED_BACKREF_REV 1 148 149 /* 150 * every tree block (leaf or node) starts with this header. 151 */ 152 struct btrfs_header { 153 /* these first four must match the super block */ 154 u8 csum[BTRFS_CSUM_SIZE]; 155 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 156 __le64 bytenr; /* which block this node is supposed to live in */ 157 __le64 flags; 158 159 /* allowed to be different from the super from here on down */ 160 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 161 __le64 generation; 162 __le64 owner; 163 __le32 nritems; 164 u8 level; 165 } __attribute__ ((__packed__)); 166 167 /* 168 * this is a very generous portion of the super block, giving us 169 * room to translate 14 chunks with 3 stripes each. 170 */ 171 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 172 173 /* 174 * just in case we somehow lose the roots and are not able to mount, 175 * we store an array of the roots from previous transactions 176 * in the super. 177 */ 178 #define BTRFS_NUM_BACKUP_ROOTS 4 179 struct btrfs_root_backup { 180 __le64 tree_root; 181 __le64 tree_root_gen; 182 183 __le64 chunk_root; 184 __le64 chunk_root_gen; 185 186 __le64 extent_root; 187 __le64 extent_root_gen; 188 189 __le64 fs_root; 190 __le64 fs_root_gen; 191 192 __le64 dev_root; 193 __le64 dev_root_gen; 194 195 __le64 csum_root; 196 __le64 csum_root_gen; 197 198 __le64 total_bytes; 199 __le64 bytes_used; 200 __le64 num_devices; 201 /* future */ 202 __le64 unused_64[4]; 203 204 u8 tree_root_level; 205 u8 chunk_root_level; 206 u8 extent_root_level; 207 u8 fs_root_level; 208 u8 dev_root_level; 209 u8 csum_root_level; 210 /* future and to align */ 211 u8 unused_8[10]; 212 } __attribute__ ((__packed__)); 213 214 /* 215 * the super block basically lists the main trees of the FS 216 * it currently lacks any block count etc etc 217 */ 218 struct btrfs_super_block { 219 /* the first 4 fields must match struct btrfs_header */ 220 u8 csum[BTRFS_CSUM_SIZE]; 221 /* FS specific UUID, visible to user */ 222 u8 fsid[BTRFS_FSID_SIZE]; 223 __le64 bytenr; /* this block number */ 224 __le64 flags; 225 226 /* allowed to be different from the btrfs_header from here own down */ 227 __le64 magic; 228 __le64 generation; 229 __le64 root; 230 __le64 chunk_root; 231 __le64 log_root; 232 233 /* this will help find the new super based on the log root */ 234 __le64 log_root_transid; 235 __le64 total_bytes; 236 __le64 bytes_used; 237 __le64 root_dir_objectid; 238 __le64 num_devices; 239 __le32 sectorsize; 240 __le32 nodesize; 241 __le32 __unused_leafsize; 242 __le32 stripesize; 243 __le32 sys_chunk_array_size; 244 __le64 chunk_root_generation; 245 __le64 compat_flags; 246 __le64 compat_ro_flags; 247 __le64 incompat_flags; 248 __le16 csum_type; 249 u8 root_level; 250 u8 chunk_root_level; 251 u8 log_root_level; 252 struct btrfs_dev_item dev_item; 253 254 char label[BTRFS_LABEL_SIZE]; 255 256 __le64 cache_generation; 257 __le64 uuid_tree_generation; 258 259 /* the UUID written into btree blocks */ 260 u8 metadata_uuid[BTRFS_FSID_SIZE]; 261 262 /* future expansion */ 263 __le64 reserved[28]; 264 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 265 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 266 } __attribute__ ((__packed__)); 267 268 /* 269 * Compat flags that we support. If any incompat flags are set other than the 270 * ones specified below then we will fail to mount 271 */ 272 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 273 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 274 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 275 276 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 277 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 278 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 279 280 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 281 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 282 283 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 284 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 285 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 286 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 287 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 288 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 289 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 290 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 291 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 292 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 293 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 294 BTRFS_FEATURE_INCOMPAT_METADATA_UUID) 295 296 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 297 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 298 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 299 300 /* 301 * A leaf is full of items. offset and size tell us where to find 302 * the item in the leaf (relative to the start of the data area) 303 */ 304 struct btrfs_item { 305 struct btrfs_disk_key key; 306 __le32 offset; 307 __le32 size; 308 } __attribute__ ((__packed__)); 309 310 /* 311 * leaves have an item area and a data area: 312 * [item0, item1....itemN] [free space] [dataN...data1, data0] 313 * 314 * The data is separate from the items to get the keys closer together 315 * during searches. 316 */ 317 struct btrfs_leaf { 318 struct btrfs_header header; 319 struct btrfs_item items[]; 320 } __attribute__ ((__packed__)); 321 322 /* 323 * all non-leaf blocks are nodes, they hold only keys and pointers to 324 * other blocks 325 */ 326 struct btrfs_key_ptr { 327 struct btrfs_disk_key key; 328 __le64 blockptr; 329 __le64 generation; 330 } __attribute__ ((__packed__)); 331 332 struct btrfs_node { 333 struct btrfs_header header; 334 struct btrfs_key_ptr ptrs[]; 335 } __attribute__ ((__packed__)); 336 337 /* 338 * btrfs_paths remember the path taken from the root down to the leaf. 339 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 340 * to any other levels that are present. 341 * 342 * The slots array records the index of the item or block pointer 343 * used while walking the tree. 344 */ 345 enum { READA_NONE, READA_BACK, READA_FORWARD }; 346 struct btrfs_path { 347 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 348 int slots[BTRFS_MAX_LEVEL]; 349 /* if there is real range locking, this locks field will change */ 350 u8 locks[BTRFS_MAX_LEVEL]; 351 u8 reada; 352 /* keep some upper locks as we walk down */ 353 u8 lowest_level; 354 355 /* 356 * set by btrfs_split_item, tells search_slot to keep all locks 357 * and to force calls to keep space in the nodes 358 */ 359 unsigned int search_for_split:1; 360 unsigned int keep_locks:1; 361 unsigned int skip_locking:1; 362 unsigned int leave_spinning:1; 363 unsigned int search_commit_root:1; 364 unsigned int need_commit_sem:1; 365 unsigned int skip_release_on_error:1; 366 }; 367 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 368 sizeof(struct btrfs_item)) 369 struct btrfs_dev_replace { 370 u64 replace_state; /* see #define above */ 371 time64_t time_started; /* seconds since 1-Jan-1970 */ 372 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 373 atomic64_t num_write_errors; 374 atomic64_t num_uncorrectable_read_errors; 375 376 u64 cursor_left; 377 u64 committed_cursor_left; 378 u64 cursor_left_last_write_of_item; 379 u64 cursor_right; 380 381 u64 cont_reading_from_srcdev_mode; /* see #define above */ 382 383 int is_valid; 384 int item_needs_writeback; 385 struct btrfs_device *srcdev; 386 struct btrfs_device *tgtdev; 387 388 struct mutex lock_finishing_cancel_unmount; 389 struct rw_semaphore rwsem; 390 391 struct btrfs_scrub_progress scrub_progress; 392 393 struct percpu_counter bio_counter; 394 wait_queue_head_t replace_wait; 395 }; 396 397 /* 398 * free clusters are used to claim free space in relatively large chunks, 399 * allowing us to do less seeky writes. They are used for all metadata 400 * allocations. In ssd_spread mode they are also used for data allocations. 401 */ 402 struct btrfs_free_cluster { 403 spinlock_t lock; 404 spinlock_t refill_lock; 405 struct rb_root root; 406 407 /* largest extent in this cluster */ 408 u64 max_size; 409 410 /* first extent starting offset */ 411 u64 window_start; 412 413 /* We did a full search and couldn't create a cluster */ 414 bool fragmented; 415 416 struct btrfs_block_group_cache *block_group; 417 /* 418 * when a cluster is allocated from a block group, we put the 419 * cluster onto a list in the block group so that it can 420 * be freed before the block group is freed. 421 */ 422 struct list_head block_group_list; 423 }; 424 425 enum btrfs_caching_type { 426 BTRFS_CACHE_NO, 427 BTRFS_CACHE_STARTED, 428 BTRFS_CACHE_FAST, 429 BTRFS_CACHE_FINISHED, 430 BTRFS_CACHE_ERROR, 431 }; 432 433 /* 434 * Tree to record all locked full stripes of a RAID5/6 block group 435 */ 436 struct btrfs_full_stripe_locks_tree { 437 struct rb_root root; 438 struct mutex lock; 439 }; 440 441 /* delayed seq elem */ 442 struct seq_list { 443 struct list_head list; 444 u64 seq; 445 }; 446 447 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 448 449 #define SEQ_LAST ((u64)-1) 450 451 enum btrfs_orphan_cleanup_state { 452 ORPHAN_CLEANUP_STARTED = 1, 453 ORPHAN_CLEANUP_DONE = 2, 454 }; 455 456 void btrfs_init_async_reclaim_work(struct work_struct *work); 457 458 /* fs_info */ 459 struct reloc_control; 460 struct btrfs_device; 461 struct btrfs_fs_devices; 462 struct btrfs_balance_control; 463 struct btrfs_delayed_root; 464 465 /* 466 * Block group or device which contains an active swapfile. Used for preventing 467 * unsafe operations while a swapfile is active. 468 * 469 * These are sorted on (ptr, inode) (note that a block group or device can 470 * contain more than one swapfile). We compare the pointer values because we 471 * don't actually care what the object is, we just need a quick check whether 472 * the object exists in the rbtree. 473 */ 474 struct btrfs_swapfile_pin { 475 struct rb_node node; 476 void *ptr; 477 struct inode *inode; 478 /* 479 * If true, ptr points to a struct btrfs_block_group_cache. Otherwise, 480 * ptr points to a struct btrfs_device. 481 */ 482 bool is_block_group; 483 }; 484 485 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 486 487 enum { 488 BTRFS_FS_BARRIER, 489 BTRFS_FS_CLOSING_START, 490 BTRFS_FS_CLOSING_DONE, 491 BTRFS_FS_LOG_RECOVERING, 492 BTRFS_FS_OPEN, 493 BTRFS_FS_QUOTA_ENABLED, 494 BTRFS_FS_UPDATE_UUID_TREE_GEN, 495 BTRFS_FS_CREATING_FREE_SPACE_TREE, 496 BTRFS_FS_BTREE_ERR, 497 BTRFS_FS_LOG1_ERR, 498 BTRFS_FS_LOG2_ERR, 499 BTRFS_FS_QUOTA_OVERRIDE, 500 /* Used to record internally whether fs has been frozen */ 501 BTRFS_FS_FROZEN, 502 /* 503 * Indicate that a whole-filesystem exclusive operation is running 504 * (device replace, resize, device add/delete, balance) 505 */ 506 BTRFS_FS_EXCL_OP, 507 /* 508 * To info transaction_kthread we need an immediate commit so it 509 * doesn't need to wait for commit_interval 510 */ 511 BTRFS_FS_NEED_ASYNC_COMMIT, 512 /* 513 * Indicate that balance has been set up from the ioctl and is in the 514 * main phase. The fs_info::balance_ctl is initialized. 515 * Set and cleared while holding fs_info::balance_mutex. 516 */ 517 BTRFS_FS_BALANCE_RUNNING, 518 519 /* Indicate that the cleaner thread is awake and doing something. */ 520 BTRFS_FS_CLEANER_RUNNING, 521 522 /* 523 * The checksumming has an optimized version and is considered fast, 524 * so we don't need to offload checksums to workqueues. 525 */ 526 BTRFS_FS_CSUM_IMPL_FAST, 527 }; 528 529 struct btrfs_fs_info { 530 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 531 unsigned long flags; 532 struct btrfs_root *extent_root; 533 struct btrfs_root *tree_root; 534 struct btrfs_root *chunk_root; 535 struct btrfs_root *dev_root; 536 struct btrfs_root *fs_root; 537 struct btrfs_root *csum_root; 538 struct btrfs_root *quota_root; 539 struct btrfs_root *uuid_root; 540 struct btrfs_root *free_space_root; 541 542 /* the log root tree is a directory of all the other log roots */ 543 struct btrfs_root *log_root_tree; 544 545 spinlock_t fs_roots_radix_lock; 546 struct radix_tree_root fs_roots_radix; 547 548 /* block group cache stuff */ 549 spinlock_t block_group_cache_lock; 550 u64 first_logical_byte; 551 struct rb_root block_group_cache_tree; 552 553 /* keep track of unallocated space */ 554 atomic64_t free_chunk_space; 555 556 struct extent_io_tree freed_extents[2]; 557 struct extent_io_tree *pinned_extents; 558 559 /* logical->physical extent mapping */ 560 struct extent_map_tree mapping_tree; 561 562 /* 563 * block reservation for extent, checksum, root tree and 564 * delayed dir index item 565 */ 566 struct btrfs_block_rsv global_block_rsv; 567 /* block reservation for metadata operations */ 568 struct btrfs_block_rsv trans_block_rsv; 569 /* block reservation for chunk tree */ 570 struct btrfs_block_rsv chunk_block_rsv; 571 /* block reservation for delayed operations */ 572 struct btrfs_block_rsv delayed_block_rsv; 573 /* block reservation for delayed refs */ 574 struct btrfs_block_rsv delayed_refs_rsv; 575 576 struct btrfs_block_rsv empty_block_rsv; 577 578 u64 generation; 579 u64 last_trans_committed; 580 u64 avg_delayed_ref_runtime; 581 582 /* 583 * this is updated to the current trans every time a full commit 584 * is required instead of the faster short fsync log commits 585 */ 586 u64 last_trans_log_full_commit; 587 unsigned long mount_opt; 588 /* 589 * Track requests for actions that need to be done during transaction 590 * commit (like for some mount options). 591 */ 592 unsigned long pending_changes; 593 unsigned long compress_type:4; 594 unsigned int compress_level; 595 u32 commit_interval; 596 /* 597 * It is a suggestive number, the read side is safe even it gets a 598 * wrong number because we will write out the data into a regular 599 * extent. The write side(mount/remount) is under ->s_umount lock, 600 * so it is also safe. 601 */ 602 u64 max_inline; 603 604 struct btrfs_transaction *running_transaction; 605 wait_queue_head_t transaction_throttle; 606 wait_queue_head_t transaction_wait; 607 wait_queue_head_t transaction_blocked_wait; 608 wait_queue_head_t async_submit_wait; 609 610 /* 611 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 612 * when they are updated. 613 * 614 * Because we do not clear the flags for ever, so we needn't use 615 * the lock on the read side. 616 * 617 * We also needn't use the lock when we mount the fs, because 618 * there is no other task which will update the flag. 619 */ 620 spinlock_t super_lock; 621 struct btrfs_super_block *super_copy; 622 struct btrfs_super_block *super_for_commit; 623 struct super_block *sb; 624 struct inode *btree_inode; 625 struct mutex tree_log_mutex; 626 struct mutex transaction_kthread_mutex; 627 struct mutex cleaner_mutex; 628 struct mutex chunk_mutex; 629 630 /* 631 * this is taken to make sure we don't set block groups ro after 632 * the free space cache has been allocated on them 633 */ 634 struct mutex ro_block_group_mutex; 635 636 /* this is used during read/modify/write to make sure 637 * no two ios are trying to mod the same stripe at the same 638 * time 639 */ 640 struct btrfs_stripe_hash_table *stripe_hash_table; 641 642 /* 643 * this protects the ordered operations list only while we are 644 * processing all of the entries on it. This way we make 645 * sure the commit code doesn't find the list temporarily empty 646 * because another function happens to be doing non-waiting preflush 647 * before jumping into the main commit. 648 */ 649 struct mutex ordered_operations_mutex; 650 651 struct rw_semaphore commit_root_sem; 652 653 struct rw_semaphore cleanup_work_sem; 654 655 struct rw_semaphore subvol_sem; 656 struct srcu_struct subvol_srcu; 657 658 spinlock_t trans_lock; 659 /* 660 * the reloc mutex goes with the trans lock, it is taken 661 * during commit to protect us from the relocation code 662 */ 663 struct mutex reloc_mutex; 664 665 struct list_head trans_list; 666 struct list_head dead_roots; 667 struct list_head caching_block_groups; 668 669 spinlock_t delayed_iput_lock; 670 struct list_head delayed_iputs; 671 atomic_t nr_delayed_iputs; 672 wait_queue_head_t delayed_iputs_wait; 673 674 /* this protects tree_mod_seq_list */ 675 spinlock_t tree_mod_seq_lock; 676 atomic64_t tree_mod_seq; 677 struct list_head tree_mod_seq_list; 678 679 /* this protects tree_mod_log */ 680 rwlock_t tree_mod_log_lock; 681 struct rb_root tree_mod_log; 682 683 atomic_t async_delalloc_pages; 684 685 /* 686 * this is used to protect the following list -- ordered_roots. 687 */ 688 spinlock_t ordered_root_lock; 689 690 /* 691 * all fs/file tree roots in which there are data=ordered extents 692 * pending writeback are added into this list. 693 * 694 * these can span multiple transactions and basically include 695 * every dirty data page that isn't from nodatacow 696 */ 697 struct list_head ordered_roots; 698 699 struct mutex delalloc_root_mutex; 700 spinlock_t delalloc_root_lock; 701 /* all fs/file tree roots that have delalloc inodes. */ 702 struct list_head delalloc_roots; 703 704 /* 705 * there is a pool of worker threads for checksumming during writes 706 * and a pool for checksumming after reads. This is because readers 707 * can run with FS locks held, and the writers may be waiting for 708 * those locks. We don't want ordering in the pending list to cause 709 * deadlocks, and so the two are serviced separately. 710 * 711 * A third pool does submit_bio to avoid deadlocking with the other 712 * two 713 */ 714 struct btrfs_workqueue *workers; 715 struct btrfs_workqueue *delalloc_workers; 716 struct btrfs_workqueue *flush_workers; 717 struct btrfs_workqueue *endio_workers; 718 struct btrfs_workqueue *endio_meta_workers; 719 struct btrfs_workqueue *endio_raid56_workers; 720 struct btrfs_workqueue *endio_repair_workers; 721 struct btrfs_workqueue *rmw_workers; 722 struct btrfs_workqueue *endio_meta_write_workers; 723 struct btrfs_workqueue *endio_write_workers; 724 struct btrfs_workqueue *endio_freespace_worker; 725 struct btrfs_workqueue *submit_workers; 726 struct btrfs_workqueue *caching_workers; 727 struct btrfs_workqueue *readahead_workers; 728 729 /* 730 * fixup workers take dirty pages that didn't properly go through 731 * the cow mechanism and make them safe to write. It happens 732 * for the sys_munmap function call path 733 */ 734 struct btrfs_workqueue *fixup_workers; 735 struct btrfs_workqueue *delayed_workers; 736 737 struct task_struct *transaction_kthread; 738 struct task_struct *cleaner_kthread; 739 u32 thread_pool_size; 740 741 struct kobject *space_info_kobj; 742 743 u64 total_pinned; 744 745 /* used to keep from writing metadata until there is a nice batch */ 746 struct percpu_counter dirty_metadata_bytes; 747 struct percpu_counter delalloc_bytes; 748 struct percpu_counter dio_bytes; 749 s32 dirty_metadata_batch; 750 s32 delalloc_batch; 751 752 struct list_head dirty_cowonly_roots; 753 754 struct btrfs_fs_devices *fs_devices; 755 756 /* 757 * The space_info list is effectively read only after initial 758 * setup. It is populated at mount time and cleaned up after 759 * all block groups are removed. RCU is used to protect it. 760 */ 761 struct list_head space_info; 762 763 struct btrfs_space_info *data_sinfo; 764 765 struct reloc_control *reloc_ctl; 766 767 /* data_alloc_cluster is only used in ssd_spread mode */ 768 struct btrfs_free_cluster data_alloc_cluster; 769 770 /* all metadata allocations go through this cluster */ 771 struct btrfs_free_cluster meta_alloc_cluster; 772 773 /* auto defrag inodes go here */ 774 spinlock_t defrag_inodes_lock; 775 struct rb_root defrag_inodes; 776 atomic_t defrag_running; 777 778 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 779 seqlock_t profiles_lock; 780 /* 781 * these three are in extended format (availability of single 782 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 783 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 784 */ 785 u64 avail_data_alloc_bits; 786 u64 avail_metadata_alloc_bits; 787 u64 avail_system_alloc_bits; 788 789 /* restriper state */ 790 spinlock_t balance_lock; 791 struct mutex balance_mutex; 792 atomic_t balance_pause_req; 793 atomic_t balance_cancel_req; 794 struct btrfs_balance_control *balance_ctl; 795 wait_queue_head_t balance_wait_q; 796 797 u32 data_chunk_allocations; 798 u32 metadata_ratio; 799 800 void *bdev_holder; 801 802 /* private scrub information */ 803 struct mutex scrub_lock; 804 atomic_t scrubs_running; 805 atomic_t scrub_pause_req; 806 atomic_t scrubs_paused; 807 atomic_t scrub_cancel_req; 808 wait_queue_head_t scrub_pause_wait; 809 /* 810 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 811 * running. 812 */ 813 refcount_t scrub_workers_refcnt; 814 struct btrfs_workqueue *scrub_workers; 815 struct btrfs_workqueue *scrub_wr_completion_workers; 816 struct btrfs_workqueue *scrub_parity_workers; 817 818 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 819 u32 check_integrity_print_mask; 820 #endif 821 /* is qgroup tracking in a consistent state? */ 822 u64 qgroup_flags; 823 824 /* holds configuration and tracking. Protected by qgroup_lock */ 825 struct rb_root qgroup_tree; 826 spinlock_t qgroup_lock; 827 828 /* 829 * used to avoid frequently calling ulist_alloc()/ulist_free() 830 * when doing qgroup accounting, it must be protected by qgroup_lock. 831 */ 832 struct ulist *qgroup_ulist; 833 834 /* protect user change for quota operations */ 835 struct mutex qgroup_ioctl_lock; 836 837 /* list of dirty qgroups to be written at next commit */ 838 struct list_head dirty_qgroups; 839 840 /* used by qgroup for an efficient tree traversal */ 841 u64 qgroup_seq; 842 843 /* qgroup rescan items */ 844 struct mutex qgroup_rescan_lock; /* protects the progress item */ 845 struct btrfs_key qgroup_rescan_progress; 846 struct btrfs_workqueue *qgroup_rescan_workers; 847 struct completion qgroup_rescan_completion; 848 struct btrfs_work qgroup_rescan_work; 849 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 850 851 /* filesystem state */ 852 unsigned long fs_state; 853 854 struct btrfs_delayed_root *delayed_root; 855 856 /* readahead tree */ 857 spinlock_t reada_lock; 858 struct radix_tree_root reada_tree; 859 860 /* readahead works cnt */ 861 atomic_t reada_works_cnt; 862 863 /* Extent buffer radix tree */ 864 spinlock_t buffer_lock; 865 struct radix_tree_root buffer_radix; 866 867 /* next backup root to be overwritten */ 868 int backup_root_index; 869 870 /* device replace state */ 871 struct btrfs_dev_replace dev_replace; 872 873 struct semaphore uuid_tree_rescan_sem; 874 875 /* Used to reclaim the metadata space in the background. */ 876 struct work_struct async_reclaim_work; 877 878 spinlock_t unused_bgs_lock; 879 struct list_head unused_bgs; 880 struct mutex unused_bg_unpin_mutex; 881 struct mutex delete_unused_bgs_mutex; 882 883 /* Cached block sizes */ 884 u32 nodesize; 885 u32 sectorsize; 886 u32 stripesize; 887 888 /* Block groups and devices containing active swapfiles. */ 889 spinlock_t swapfile_pins_lock; 890 struct rb_root swapfile_pins; 891 892 struct crypto_shash *csum_shash; 893 894 /* 895 * Number of send operations in progress. 896 * Updated while holding fs_info::balance_mutex. 897 */ 898 int send_in_progress; 899 900 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 901 spinlock_t ref_verify_lock; 902 struct rb_root block_tree; 903 #endif 904 }; 905 906 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 907 { 908 return sb->s_fs_info; 909 } 910 911 struct btrfs_subvolume_writers { 912 struct percpu_counter counter; 913 wait_queue_head_t wait; 914 }; 915 916 /* 917 * The state of btrfs root 918 */ 919 enum { 920 /* 921 * btrfs_record_root_in_trans is a multi-step process, and it can race 922 * with the balancing code. But the race is very small, and only the 923 * first time the root is added to each transaction. So IN_TRANS_SETUP 924 * is used to tell us when more checks are required 925 */ 926 BTRFS_ROOT_IN_TRANS_SETUP, 927 BTRFS_ROOT_REF_COWS, 928 BTRFS_ROOT_TRACK_DIRTY, 929 BTRFS_ROOT_IN_RADIX, 930 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 931 BTRFS_ROOT_DEFRAG_RUNNING, 932 BTRFS_ROOT_FORCE_COW, 933 BTRFS_ROOT_MULTI_LOG_TASKS, 934 BTRFS_ROOT_DIRTY, 935 BTRFS_ROOT_DELETING, 936 937 /* 938 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 939 * 940 * Set for the subvolume tree owning the reloc tree. 941 */ 942 BTRFS_ROOT_DEAD_RELOC_TREE, 943 /* Mark dead root stored on device whose cleanup needs to be resumed */ 944 BTRFS_ROOT_DEAD_TREE, 945 }; 946 947 /* 948 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 949 * code. For detail check comment in fs/btrfs/qgroup.c. 950 */ 951 struct btrfs_qgroup_swapped_blocks { 952 spinlock_t lock; 953 /* RM_EMPTY_ROOT() of above blocks[] */ 954 bool swapped; 955 struct rb_root blocks[BTRFS_MAX_LEVEL]; 956 }; 957 958 /* 959 * in ram representation of the tree. extent_root is used for all allocations 960 * and for the extent tree extent_root root. 961 */ 962 struct btrfs_root { 963 struct extent_buffer *node; 964 965 struct extent_buffer *commit_root; 966 struct btrfs_root *log_root; 967 struct btrfs_root *reloc_root; 968 969 unsigned long state; 970 struct btrfs_root_item root_item; 971 struct btrfs_key root_key; 972 struct btrfs_fs_info *fs_info; 973 struct extent_io_tree dirty_log_pages; 974 975 struct mutex objectid_mutex; 976 977 spinlock_t accounting_lock; 978 struct btrfs_block_rsv *block_rsv; 979 980 /* free ino cache stuff */ 981 struct btrfs_free_space_ctl *free_ino_ctl; 982 enum btrfs_caching_type ino_cache_state; 983 spinlock_t ino_cache_lock; 984 wait_queue_head_t ino_cache_wait; 985 struct btrfs_free_space_ctl *free_ino_pinned; 986 u64 ino_cache_progress; 987 struct inode *ino_cache_inode; 988 989 struct mutex log_mutex; 990 wait_queue_head_t log_writer_wait; 991 wait_queue_head_t log_commit_wait[2]; 992 struct list_head log_ctxs[2]; 993 atomic_t log_writers; 994 atomic_t log_commit[2]; 995 atomic_t log_batch; 996 int log_transid; 997 /* No matter the commit succeeds or not*/ 998 int log_transid_committed; 999 /* Just be updated when the commit succeeds. */ 1000 int last_log_commit; 1001 pid_t log_start_pid; 1002 1003 u64 last_trans; 1004 1005 u32 type; 1006 1007 u64 highest_objectid; 1008 1009 u64 defrag_trans_start; 1010 struct btrfs_key defrag_progress; 1011 struct btrfs_key defrag_max; 1012 1013 /* the dirty list is only used by non-reference counted roots */ 1014 struct list_head dirty_list; 1015 1016 struct list_head root_list; 1017 1018 spinlock_t log_extents_lock[2]; 1019 struct list_head logged_list[2]; 1020 1021 int orphan_cleanup_state; 1022 1023 spinlock_t inode_lock; 1024 /* red-black tree that keeps track of in-memory inodes */ 1025 struct rb_root inode_tree; 1026 1027 /* 1028 * radix tree that keeps track of delayed nodes of every inode, 1029 * protected by inode_lock 1030 */ 1031 struct radix_tree_root delayed_nodes_tree; 1032 /* 1033 * right now this just gets used so that a root has its own devid 1034 * for stat. It may be used for more later 1035 */ 1036 dev_t anon_dev; 1037 1038 spinlock_t root_item_lock; 1039 refcount_t refs; 1040 1041 struct mutex delalloc_mutex; 1042 spinlock_t delalloc_lock; 1043 /* 1044 * all of the inodes that have delalloc bytes. It is possible for 1045 * this list to be empty even when there is still dirty data=ordered 1046 * extents waiting to finish IO. 1047 */ 1048 struct list_head delalloc_inodes; 1049 struct list_head delalloc_root; 1050 u64 nr_delalloc_inodes; 1051 1052 struct mutex ordered_extent_mutex; 1053 /* 1054 * this is used by the balancing code to wait for all the pending 1055 * ordered extents 1056 */ 1057 spinlock_t ordered_extent_lock; 1058 1059 /* 1060 * all of the data=ordered extents pending writeback 1061 * these can span multiple transactions and basically include 1062 * every dirty data page that isn't from nodatacow 1063 */ 1064 struct list_head ordered_extents; 1065 struct list_head ordered_root; 1066 u64 nr_ordered_extents; 1067 1068 /* 1069 * Not empty if this subvolume root has gone through tree block swap 1070 * (relocation) 1071 * 1072 * Will be used by reloc_control::dirty_subvol_roots. 1073 */ 1074 struct list_head reloc_dirty_list; 1075 1076 /* 1077 * Number of currently running SEND ioctls to prevent 1078 * manipulation with the read-only status via SUBVOL_SETFLAGS 1079 */ 1080 int send_in_progress; 1081 /* 1082 * Number of currently running deduplication operations that have a 1083 * destination inode belonging to this root. Protected by the lock 1084 * root_item_lock. 1085 */ 1086 int dedupe_in_progress; 1087 struct btrfs_subvolume_writers *subv_writers; 1088 atomic_t will_be_snapshotted; 1089 atomic_t snapshot_force_cow; 1090 1091 /* For qgroup metadata reserved space */ 1092 spinlock_t qgroup_meta_rsv_lock; 1093 u64 qgroup_meta_rsv_pertrans; 1094 u64 qgroup_meta_rsv_prealloc; 1095 1096 /* Number of active swapfiles */ 1097 atomic_t nr_swapfiles; 1098 1099 /* Record pairs of swapped blocks for qgroup */ 1100 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1101 1102 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1103 u64 alloc_bytenr; 1104 #endif 1105 }; 1106 1107 struct btrfs_clone_extent_info { 1108 u64 disk_offset; 1109 u64 disk_len; 1110 u64 data_offset; 1111 u64 data_len; 1112 u64 file_offset; 1113 char *extent_buf; 1114 u32 item_size; 1115 }; 1116 1117 struct btrfs_file_private { 1118 void *filldir_buf; 1119 }; 1120 1121 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1122 { 1123 return btrfs_sb(inode->i_sb)->sectorsize; 1124 } 1125 1126 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1127 { 1128 1129 return info->nodesize - sizeof(struct btrfs_header); 1130 } 1131 1132 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1133 1134 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1135 { 1136 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1137 } 1138 1139 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1140 { 1141 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1142 } 1143 1144 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1145 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1146 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1147 { 1148 return BTRFS_MAX_ITEM_SIZE(info) - 1149 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1150 } 1151 1152 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1153 { 1154 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1155 } 1156 1157 /* 1158 * Flags for mount options. 1159 * 1160 * Note: don't forget to add new options to btrfs_show_options() 1161 */ 1162 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1163 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1164 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1165 #define BTRFS_MOUNT_SSD (1 << 3) 1166 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1167 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1168 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1169 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1170 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1171 #define BTRFS_MOUNT_NOSSD (1 << 9) 1172 #define BTRFS_MOUNT_DISCARD (1 << 10) 1173 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1174 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1175 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1176 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1177 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1178 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1179 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1180 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1181 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1182 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1183 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1184 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1185 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1186 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1187 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1188 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1189 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1190 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1191 1192 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1193 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1194 1195 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1196 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1197 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1198 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1199 BTRFS_MOUNT_##opt) 1200 1201 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1202 { \ 1203 if (!btrfs_test_opt(fs_info, opt)) \ 1204 btrfs_info(fs_info, fmt, ##args); \ 1205 btrfs_set_opt(fs_info->mount_opt, opt); \ 1206 } 1207 1208 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1209 { \ 1210 if (btrfs_test_opt(fs_info, opt)) \ 1211 btrfs_info(fs_info, fmt, ##args); \ 1212 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1213 } 1214 1215 /* 1216 * Requests for changes that need to be done during transaction commit. 1217 * 1218 * Internal mount options that are used for special handling of the real 1219 * mount options (eg. cannot be set during remount and have to be set during 1220 * transaction commit) 1221 */ 1222 1223 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1224 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1225 #define BTRFS_PENDING_COMMIT (2) 1226 1227 #define btrfs_test_pending(info, opt) \ 1228 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1229 #define btrfs_set_pending(info, opt) \ 1230 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1231 #define btrfs_clear_pending(info, opt) \ 1232 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1233 1234 /* 1235 * Helpers for setting pending mount option changes. 1236 * 1237 * Expects corresponding macros 1238 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1239 */ 1240 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1241 do { \ 1242 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1243 btrfs_info((info), fmt, ##args); \ 1244 btrfs_set_pending((info), SET_##opt); \ 1245 btrfs_clear_pending((info), CLEAR_##opt); \ 1246 } \ 1247 } while(0) 1248 1249 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1250 do { \ 1251 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1252 btrfs_info((info), fmt, ##args); \ 1253 btrfs_set_pending((info), CLEAR_##opt); \ 1254 btrfs_clear_pending((info), SET_##opt); \ 1255 } \ 1256 } while(0) 1257 1258 /* 1259 * Inode flags 1260 */ 1261 #define BTRFS_INODE_NODATASUM (1 << 0) 1262 #define BTRFS_INODE_NODATACOW (1 << 1) 1263 #define BTRFS_INODE_READONLY (1 << 2) 1264 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1265 #define BTRFS_INODE_PREALLOC (1 << 4) 1266 #define BTRFS_INODE_SYNC (1 << 5) 1267 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1268 #define BTRFS_INODE_APPEND (1 << 7) 1269 #define BTRFS_INODE_NODUMP (1 << 8) 1270 #define BTRFS_INODE_NOATIME (1 << 9) 1271 #define BTRFS_INODE_DIRSYNC (1 << 10) 1272 #define BTRFS_INODE_COMPRESS (1 << 11) 1273 1274 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1275 1276 #define BTRFS_INODE_FLAG_MASK \ 1277 (BTRFS_INODE_NODATASUM | \ 1278 BTRFS_INODE_NODATACOW | \ 1279 BTRFS_INODE_READONLY | \ 1280 BTRFS_INODE_NOCOMPRESS | \ 1281 BTRFS_INODE_PREALLOC | \ 1282 BTRFS_INODE_SYNC | \ 1283 BTRFS_INODE_IMMUTABLE | \ 1284 BTRFS_INODE_APPEND | \ 1285 BTRFS_INODE_NODUMP | \ 1286 BTRFS_INODE_NOATIME | \ 1287 BTRFS_INODE_DIRSYNC | \ 1288 BTRFS_INODE_COMPRESS | \ 1289 BTRFS_INODE_ROOT_ITEM_INIT) 1290 1291 struct btrfs_map_token { 1292 const struct extent_buffer *eb; 1293 char *kaddr; 1294 unsigned long offset; 1295 }; 1296 1297 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1298 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1299 1300 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1301 struct extent_buffer *eb) 1302 { 1303 token->eb = eb; 1304 token->kaddr = NULL; 1305 } 1306 1307 /* some macros to generate set/get functions for the struct fields. This 1308 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1309 * one for u8: 1310 */ 1311 #define le8_to_cpu(v) (v) 1312 #define cpu_to_le8(v) (v) 1313 #define __le8 u8 1314 1315 #define read_eb_member(eb, ptr, type, member, result) (\ 1316 read_extent_buffer(eb, (char *)(result), \ 1317 ((unsigned long)(ptr)) + \ 1318 offsetof(type, member), \ 1319 sizeof(((type *)0)->member))) 1320 1321 #define write_eb_member(eb, ptr, type, member, result) (\ 1322 write_extent_buffer(eb, (char *)(result), \ 1323 ((unsigned long)(ptr)) + \ 1324 offsetof(type, member), \ 1325 sizeof(((type *)0)->member))) 1326 1327 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1328 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1329 const void *ptr, unsigned long off, \ 1330 struct btrfs_map_token *token); \ 1331 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1332 unsigned long off, u##bits val, \ 1333 struct btrfs_map_token *token); \ 1334 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1335 const void *ptr, unsigned long off); \ 1336 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1337 unsigned long off, u##bits val); 1338 1339 DECLARE_BTRFS_SETGET_BITS(8) 1340 DECLARE_BTRFS_SETGET_BITS(16) 1341 DECLARE_BTRFS_SETGET_BITS(32) 1342 DECLARE_BTRFS_SETGET_BITS(64) 1343 1344 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1345 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1346 const type *s) \ 1347 { \ 1348 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1349 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1350 } \ 1351 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1352 u##bits val) \ 1353 { \ 1354 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1355 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1356 } \ 1357 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1358 const type *s, \ 1359 struct btrfs_map_token *token) \ 1360 { \ 1361 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1362 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1363 } \ 1364 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1365 type *s, u##bits val, \ 1366 struct btrfs_map_token *token) \ 1367 { \ 1368 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1369 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1370 } 1371 1372 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1373 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1374 { \ 1375 const type *p = page_address(eb->pages[0]); \ 1376 u##bits res = le##bits##_to_cpu(p->member); \ 1377 return res; \ 1378 } \ 1379 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1380 u##bits val) \ 1381 { \ 1382 type *p = page_address(eb->pages[0]); \ 1383 p->member = cpu_to_le##bits(val); \ 1384 } 1385 1386 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1387 static inline u##bits btrfs_##name(const type *s) \ 1388 { \ 1389 return le##bits##_to_cpu(s->member); \ 1390 } \ 1391 static inline void btrfs_set_##name(type *s, u##bits val) \ 1392 { \ 1393 s->member = cpu_to_le##bits(val); \ 1394 } 1395 1396 1397 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1398 struct btrfs_dev_item *s) 1399 { 1400 BUILD_BUG_ON(sizeof(u64) != 1401 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1402 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1403 total_bytes)); 1404 } 1405 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1406 struct btrfs_dev_item *s, 1407 u64 val) 1408 { 1409 BUILD_BUG_ON(sizeof(u64) != 1410 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1411 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1412 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1413 } 1414 1415 1416 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1417 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1418 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1419 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1420 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1421 start_offset, 64); 1422 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1423 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1424 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1425 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1426 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1427 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1428 1429 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1430 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1431 total_bytes, 64); 1432 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1433 bytes_used, 64); 1434 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1435 io_align, 32); 1436 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1437 io_width, 32); 1438 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1439 sector_size, 32); 1440 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1441 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1442 dev_group, 32); 1443 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1444 seek_speed, 8); 1445 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1446 bandwidth, 8); 1447 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1448 generation, 64); 1449 1450 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1451 { 1452 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1453 } 1454 1455 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1456 { 1457 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1458 } 1459 1460 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1461 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1462 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1463 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1464 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1465 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1466 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1467 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1468 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1469 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1470 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1471 1472 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1473 { 1474 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1475 } 1476 1477 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1478 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1479 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1480 stripe_len, 64); 1481 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1482 io_align, 32); 1483 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1484 io_width, 32); 1485 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1486 sector_size, 32); 1487 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1488 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1489 num_stripes, 16); 1490 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1491 sub_stripes, 16); 1492 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1493 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1494 1495 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1496 int nr) 1497 { 1498 unsigned long offset = (unsigned long)c; 1499 offset += offsetof(struct btrfs_chunk, stripe); 1500 offset += nr * sizeof(struct btrfs_stripe); 1501 return (struct btrfs_stripe *)offset; 1502 } 1503 1504 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1505 { 1506 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1507 } 1508 1509 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1510 struct btrfs_chunk *c, int nr) 1511 { 1512 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1513 } 1514 1515 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1516 struct btrfs_chunk *c, int nr) 1517 { 1518 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1519 } 1520 1521 /* struct btrfs_block_group_item */ 1522 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1523 used, 64); 1524 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1525 used, 64); 1526 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1527 struct btrfs_block_group_item, chunk_objectid, 64); 1528 1529 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1530 struct btrfs_block_group_item, chunk_objectid, 64); 1531 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1532 struct btrfs_block_group_item, flags, 64); 1533 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1534 struct btrfs_block_group_item, flags, 64); 1535 1536 /* struct btrfs_free_space_info */ 1537 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1538 extent_count, 32); 1539 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1540 1541 /* struct btrfs_inode_ref */ 1542 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1543 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1544 1545 /* struct btrfs_inode_extref */ 1546 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1547 parent_objectid, 64); 1548 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1549 name_len, 16); 1550 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1551 1552 /* struct btrfs_inode_item */ 1553 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1554 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1555 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1556 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1557 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1558 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1559 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1560 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1561 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1562 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1563 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1564 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1565 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1566 generation, 64); 1567 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1568 sequence, 64); 1569 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1570 transid, 64); 1571 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1572 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1573 nbytes, 64); 1574 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1575 block_group, 64); 1576 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1577 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1579 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1581 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1582 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1583 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1584 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1585 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1586 1587 /* struct btrfs_dev_extent */ 1588 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1589 chunk_tree, 64); 1590 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1591 chunk_objectid, 64); 1592 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1593 chunk_offset, 64); 1594 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1595 1596 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1597 { 1598 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1599 return (unsigned long)dev + ptr; 1600 } 1601 1602 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1603 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1604 generation, 64); 1605 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1606 1607 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1608 1609 1610 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1611 1612 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1613 struct btrfs_tree_block_info *item, 1614 struct btrfs_disk_key *key) 1615 { 1616 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1617 } 1618 1619 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1620 struct btrfs_tree_block_info *item, 1621 struct btrfs_disk_key *key) 1622 { 1623 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1624 } 1625 1626 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1627 root, 64); 1628 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1629 objectid, 64); 1630 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1631 offset, 64); 1632 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1633 count, 32); 1634 1635 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1636 count, 32); 1637 1638 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1639 type, 8); 1640 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1641 offset, 64); 1642 1643 static inline u32 btrfs_extent_inline_ref_size(int type) 1644 { 1645 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1646 type == BTRFS_SHARED_BLOCK_REF_KEY) 1647 return sizeof(struct btrfs_extent_inline_ref); 1648 if (type == BTRFS_SHARED_DATA_REF_KEY) 1649 return sizeof(struct btrfs_shared_data_ref) + 1650 sizeof(struct btrfs_extent_inline_ref); 1651 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1652 return sizeof(struct btrfs_extent_data_ref) + 1653 offsetof(struct btrfs_extent_inline_ref, offset); 1654 return 0; 1655 } 1656 1657 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1658 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1659 generation, 64); 1660 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1661 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1662 1663 /* struct btrfs_node */ 1664 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1665 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1666 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1667 blockptr, 64); 1668 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1669 generation, 64); 1670 1671 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1672 { 1673 unsigned long ptr; 1674 ptr = offsetof(struct btrfs_node, ptrs) + 1675 sizeof(struct btrfs_key_ptr) * nr; 1676 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1677 } 1678 1679 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1680 int nr, u64 val) 1681 { 1682 unsigned long ptr; 1683 ptr = offsetof(struct btrfs_node, ptrs) + 1684 sizeof(struct btrfs_key_ptr) * nr; 1685 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1686 } 1687 1688 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1689 { 1690 unsigned long ptr; 1691 ptr = offsetof(struct btrfs_node, ptrs) + 1692 sizeof(struct btrfs_key_ptr) * nr; 1693 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1694 } 1695 1696 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1697 int nr, u64 val) 1698 { 1699 unsigned long ptr; 1700 ptr = offsetof(struct btrfs_node, ptrs) + 1701 sizeof(struct btrfs_key_ptr) * nr; 1702 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1703 } 1704 1705 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1706 { 1707 return offsetof(struct btrfs_node, ptrs) + 1708 sizeof(struct btrfs_key_ptr) * nr; 1709 } 1710 1711 void btrfs_node_key(const struct extent_buffer *eb, 1712 struct btrfs_disk_key *disk_key, int nr); 1713 1714 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1715 struct btrfs_disk_key *disk_key, int nr) 1716 { 1717 unsigned long ptr; 1718 ptr = btrfs_node_key_ptr_offset(nr); 1719 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1720 struct btrfs_key_ptr, key, disk_key); 1721 } 1722 1723 /* struct btrfs_item */ 1724 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1725 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1726 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1727 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1728 1729 static inline unsigned long btrfs_item_nr_offset(int nr) 1730 { 1731 return offsetof(struct btrfs_leaf, items) + 1732 sizeof(struct btrfs_item) * nr; 1733 } 1734 1735 static inline struct btrfs_item *btrfs_item_nr(int nr) 1736 { 1737 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1738 } 1739 1740 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1741 struct btrfs_item *item) 1742 { 1743 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1744 } 1745 1746 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1747 { 1748 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1749 } 1750 1751 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1752 { 1753 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1754 } 1755 1756 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1757 { 1758 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1759 } 1760 1761 static inline void btrfs_item_key(const struct extent_buffer *eb, 1762 struct btrfs_disk_key *disk_key, int nr) 1763 { 1764 struct btrfs_item *item = btrfs_item_nr(nr); 1765 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1766 } 1767 1768 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1769 struct btrfs_disk_key *disk_key, int nr) 1770 { 1771 struct btrfs_item *item = btrfs_item_nr(nr); 1772 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1773 } 1774 1775 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1776 1777 /* 1778 * struct btrfs_root_ref 1779 */ 1780 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1781 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1782 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1783 1784 /* struct btrfs_dir_item */ 1785 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1786 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1787 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1788 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1789 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1790 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1791 data_len, 16); 1792 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1793 name_len, 16); 1794 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1795 transid, 64); 1796 1797 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1798 const struct btrfs_dir_item *item, 1799 struct btrfs_disk_key *key) 1800 { 1801 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1802 } 1803 1804 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1805 struct btrfs_dir_item *item, 1806 const struct btrfs_disk_key *key) 1807 { 1808 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1809 } 1810 1811 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1812 num_entries, 64); 1813 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1814 num_bitmaps, 64); 1815 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1816 generation, 64); 1817 1818 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1819 const struct btrfs_free_space_header *h, 1820 struct btrfs_disk_key *key) 1821 { 1822 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1823 } 1824 1825 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1826 struct btrfs_free_space_header *h, 1827 const struct btrfs_disk_key *key) 1828 { 1829 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1830 } 1831 1832 /* struct btrfs_disk_key */ 1833 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1834 objectid, 64); 1835 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1836 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1837 1838 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1839 const struct btrfs_disk_key *disk) 1840 { 1841 cpu->offset = le64_to_cpu(disk->offset); 1842 cpu->type = disk->type; 1843 cpu->objectid = le64_to_cpu(disk->objectid); 1844 } 1845 1846 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1847 const struct btrfs_key *cpu) 1848 { 1849 disk->offset = cpu_to_le64(cpu->offset); 1850 disk->type = cpu->type; 1851 disk->objectid = cpu_to_le64(cpu->objectid); 1852 } 1853 1854 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1855 struct btrfs_key *key, int nr) 1856 { 1857 struct btrfs_disk_key disk_key; 1858 btrfs_node_key(eb, &disk_key, nr); 1859 btrfs_disk_key_to_cpu(key, &disk_key); 1860 } 1861 1862 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1863 struct btrfs_key *key, int nr) 1864 { 1865 struct btrfs_disk_key disk_key; 1866 btrfs_item_key(eb, &disk_key, nr); 1867 btrfs_disk_key_to_cpu(key, &disk_key); 1868 } 1869 1870 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1871 const struct btrfs_dir_item *item, 1872 struct btrfs_key *key) 1873 { 1874 struct btrfs_disk_key disk_key; 1875 btrfs_dir_item_key(eb, item, &disk_key); 1876 btrfs_disk_key_to_cpu(key, &disk_key); 1877 } 1878 1879 /* struct btrfs_header */ 1880 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1881 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1882 generation, 64); 1883 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1884 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1885 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1886 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1887 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 1888 generation, 64); 1889 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 1890 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 1891 nritems, 32); 1892 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 1893 1894 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 1895 { 1896 return (btrfs_header_flags(eb) & flag) == flag; 1897 } 1898 1899 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1900 { 1901 u64 flags = btrfs_header_flags(eb); 1902 btrfs_set_header_flags(eb, flags | flag); 1903 } 1904 1905 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1906 { 1907 u64 flags = btrfs_header_flags(eb); 1908 btrfs_set_header_flags(eb, flags & ~flag); 1909 } 1910 1911 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 1912 { 1913 u64 flags = btrfs_header_flags(eb); 1914 return flags >> BTRFS_BACKREF_REV_SHIFT; 1915 } 1916 1917 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1918 int rev) 1919 { 1920 u64 flags = btrfs_header_flags(eb); 1921 flags &= ~BTRFS_BACKREF_REV_MASK; 1922 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1923 btrfs_set_header_flags(eb, flags); 1924 } 1925 1926 static inline unsigned long btrfs_header_fsid(void) 1927 { 1928 return offsetof(struct btrfs_header, fsid); 1929 } 1930 1931 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 1932 { 1933 return offsetof(struct btrfs_header, chunk_tree_uuid); 1934 } 1935 1936 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 1937 { 1938 return btrfs_header_level(eb) == 0; 1939 } 1940 1941 /* struct btrfs_root_item */ 1942 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1943 generation, 64); 1944 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1945 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1946 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1947 1948 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1949 generation, 64); 1950 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1951 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 1952 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 1953 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 1954 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 1955 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 1956 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 1957 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 1958 last_snapshot, 64); 1959 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 1960 generation_v2, 64); 1961 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 1962 ctransid, 64); 1963 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 1964 otransid, 64); 1965 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 1966 stransid, 64); 1967 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 1968 rtransid, 64); 1969 1970 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 1971 { 1972 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 1973 } 1974 1975 static inline bool btrfs_root_dead(const struct btrfs_root *root) 1976 { 1977 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 1978 } 1979 1980 /* struct btrfs_root_backup */ 1981 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 1982 tree_root, 64); 1983 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 1984 tree_root_gen, 64); 1985 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 1986 tree_root_level, 8); 1987 1988 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 1989 chunk_root, 64); 1990 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 1991 chunk_root_gen, 64); 1992 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 1993 chunk_root_level, 8); 1994 1995 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 1996 extent_root, 64); 1997 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 1998 extent_root_gen, 64); 1999 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2000 extent_root_level, 8); 2001 2002 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2003 fs_root, 64); 2004 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2005 fs_root_gen, 64); 2006 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2007 fs_root_level, 8); 2008 2009 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2010 dev_root, 64); 2011 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2012 dev_root_gen, 64); 2013 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2014 dev_root_level, 8); 2015 2016 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2017 csum_root, 64); 2018 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2019 csum_root_gen, 64); 2020 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2021 csum_root_level, 8); 2022 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2023 total_bytes, 64); 2024 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2025 bytes_used, 64); 2026 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2027 num_devices, 64); 2028 2029 /* struct btrfs_balance_item */ 2030 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2031 2032 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2033 const struct btrfs_balance_item *bi, 2034 struct btrfs_disk_balance_args *ba) 2035 { 2036 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2037 } 2038 2039 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2040 struct btrfs_balance_item *bi, 2041 const struct btrfs_disk_balance_args *ba) 2042 { 2043 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2044 } 2045 2046 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2047 const struct btrfs_balance_item *bi, 2048 struct btrfs_disk_balance_args *ba) 2049 { 2050 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2051 } 2052 2053 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2054 struct btrfs_balance_item *bi, 2055 const struct btrfs_disk_balance_args *ba) 2056 { 2057 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2058 } 2059 2060 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2061 const struct btrfs_balance_item *bi, 2062 struct btrfs_disk_balance_args *ba) 2063 { 2064 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2065 } 2066 2067 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2068 struct btrfs_balance_item *bi, 2069 const struct btrfs_disk_balance_args *ba) 2070 { 2071 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2072 } 2073 2074 static inline void 2075 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2076 const struct btrfs_disk_balance_args *disk) 2077 { 2078 memset(cpu, 0, sizeof(*cpu)); 2079 2080 cpu->profiles = le64_to_cpu(disk->profiles); 2081 cpu->usage = le64_to_cpu(disk->usage); 2082 cpu->devid = le64_to_cpu(disk->devid); 2083 cpu->pstart = le64_to_cpu(disk->pstart); 2084 cpu->pend = le64_to_cpu(disk->pend); 2085 cpu->vstart = le64_to_cpu(disk->vstart); 2086 cpu->vend = le64_to_cpu(disk->vend); 2087 cpu->target = le64_to_cpu(disk->target); 2088 cpu->flags = le64_to_cpu(disk->flags); 2089 cpu->limit = le64_to_cpu(disk->limit); 2090 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2091 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2092 } 2093 2094 static inline void 2095 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2096 const struct btrfs_balance_args *cpu) 2097 { 2098 memset(disk, 0, sizeof(*disk)); 2099 2100 disk->profiles = cpu_to_le64(cpu->profiles); 2101 disk->usage = cpu_to_le64(cpu->usage); 2102 disk->devid = cpu_to_le64(cpu->devid); 2103 disk->pstart = cpu_to_le64(cpu->pstart); 2104 disk->pend = cpu_to_le64(cpu->pend); 2105 disk->vstart = cpu_to_le64(cpu->vstart); 2106 disk->vend = cpu_to_le64(cpu->vend); 2107 disk->target = cpu_to_le64(cpu->target); 2108 disk->flags = cpu_to_le64(cpu->flags); 2109 disk->limit = cpu_to_le64(cpu->limit); 2110 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2111 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2112 } 2113 2114 /* struct btrfs_super_block */ 2115 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2116 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2117 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2118 generation, 64); 2119 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2120 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2121 struct btrfs_super_block, sys_chunk_array_size, 32); 2122 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2123 struct btrfs_super_block, chunk_root_generation, 64); 2124 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2125 root_level, 8); 2126 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2127 chunk_root, 64); 2128 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2129 chunk_root_level, 8); 2130 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2131 log_root, 64); 2132 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2133 log_root_transid, 64); 2134 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2135 log_root_level, 8); 2136 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2137 total_bytes, 64); 2138 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2139 bytes_used, 64); 2140 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2141 sectorsize, 32); 2142 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2143 nodesize, 32); 2144 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2145 stripesize, 32); 2146 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2147 root_dir_objectid, 64); 2148 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2149 num_devices, 64); 2150 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2151 compat_flags, 64); 2152 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2153 compat_ro_flags, 64); 2154 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2155 incompat_flags, 64); 2156 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2157 csum_type, 16); 2158 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2159 cache_generation, 64); 2160 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2161 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2162 uuid_tree_generation, 64); 2163 2164 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2165 const char *btrfs_super_csum_name(u16 csum_type); 2166 2167 /* 2168 * The leaf data grows from end-to-front in the node. 2169 * this returns the address of the start of the last item, 2170 * which is the stop of the leaf data stack 2171 */ 2172 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2173 { 2174 u32 nr = btrfs_header_nritems(leaf); 2175 2176 if (nr == 0) 2177 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2178 return btrfs_item_offset_nr(leaf, nr - 1); 2179 } 2180 2181 /* struct btrfs_file_extent_item */ 2182 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2183 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2184 struct btrfs_file_extent_item, disk_bytenr, 64); 2185 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2186 struct btrfs_file_extent_item, offset, 64); 2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2188 struct btrfs_file_extent_item, generation, 64); 2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2190 struct btrfs_file_extent_item, num_bytes, 64); 2191 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2192 struct btrfs_file_extent_item, disk_num_bytes, 64); 2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2194 struct btrfs_file_extent_item, compression, 8); 2195 2196 static inline unsigned long 2197 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2198 { 2199 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2200 } 2201 2202 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2203 { 2204 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2205 } 2206 2207 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2208 disk_bytenr, 64); 2209 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2210 generation, 64); 2211 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2212 disk_num_bytes, 64); 2213 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2214 offset, 64); 2215 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2216 num_bytes, 64); 2217 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2218 ram_bytes, 64); 2219 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2220 compression, 8); 2221 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2222 encryption, 8); 2223 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2224 other_encoding, 16); 2225 2226 /* 2227 * this returns the number of bytes used by the item on disk, minus the 2228 * size of any extent headers. If a file is compressed on disk, this is 2229 * the compressed size 2230 */ 2231 static inline u32 btrfs_file_extent_inline_item_len( 2232 const struct extent_buffer *eb, 2233 struct btrfs_item *e) 2234 { 2235 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2236 } 2237 2238 /* btrfs_qgroup_status_item */ 2239 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2240 generation, 64); 2241 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2242 version, 64); 2243 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2244 flags, 64); 2245 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2246 rescan, 64); 2247 2248 /* btrfs_qgroup_info_item */ 2249 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2250 generation, 64); 2251 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2252 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2253 rfer_cmpr, 64); 2254 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2255 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2256 excl_cmpr, 64); 2257 2258 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2259 struct btrfs_qgroup_info_item, generation, 64); 2260 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2261 rfer, 64); 2262 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2263 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2265 excl, 64); 2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2267 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2268 2269 /* btrfs_qgroup_limit_item */ 2270 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2271 flags, 64); 2272 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2273 max_rfer, 64); 2274 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2275 max_excl, 64); 2276 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2277 rsv_rfer, 64); 2278 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2279 rsv_excl, 64); 2280 2281 /* btrfs_dev_replace_item */ 2282 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2283 struct btrfs_dev_replace_item, src_devid, 64); 2284 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2285 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2286 64); 2287 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2288 replace_state, 64); 2289 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2290 time_started, 64); 2291 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2292 time_stopped, 64); 2293 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2294 num_write_errors, 64); 2295 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2296 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2297 64); 2298 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2299 cursor_left, 64); 2300 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2301 cursor_right, 64); 2302 2303 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2304 struct btrfs_dev_replace_item, src_devid, 64); 2305 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2306 struct btrfs_dev_replace_item, 2307 cont_reading_from_srcdev_mode, 64); 2308 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2309 struct btrfs_dev_replace_item, replace_state, 64); 2310 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2311 struct btrfs_dev_replace_item, time_started, 64); 2312 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2313 struct btrfs_dev_replace_item, time_stopped, 64); 2314 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2315 struct btrfs_dev_replace_item, num_write_errors, 64); 2316 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2317 struct btrfs_dev_replace_item, 2318 num_uncorrectable_read_errors, 64); 2319 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2320 struct btrfs_dev_replace_item, cursor_left, 64); 2321 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2322 struct btrfs_dev_replace_item, cursor_right, 64); 2323 2324 /* helper function to cast into the data area of the leaf. */ 2325 #define btrfs_item_ptr(leaf, slot, type) \ 2326 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2327 btrfs_item_offset_nr(leaf, slot))) 2328 2329 #define btrfs_item_ptr_offset(leaf, slot) \ 2330 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2331 btrfs_item_offset_nr(leaf, slot))) 2332 2333 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2334 { 2335 return crc32c(crc, address, length); 2336 } 2337 2338 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2339 { 2340 put_unaligned_le32(~crc, result); 2341 } 2342 2343 static inline u64 btrfs_name_hash(const char *name, int len) 2344 { 2345 return crc32c((u32)~1, name, len); 2346 } 2347 2348 /* 2349 * Figure the key offset of an extended inode ref 2350 */ 2351 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2352 int len) 2353 { 2354 return (u64) crc32c(parent_objectid, name, len); 2355 } 2356 2357 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2358 { 2359 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2360 } 2361 2362 /* extent-tree.c */ 2363 2364 enum btrfs_inline_ref_type { 2365 BTRFS_REF_TYPE_INVALID, 2366 BTRFS_REF_TYPE_BLOCK, 2367 BTRFS_REF_TYPE_DATA, 2368 BTRFS_REF_TYPE_ANY, 2369 }; 2370 2371 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2372 struct btrfs_extent_inline_ref *iref, 2373 enum btrfs_inline_ref_type is_data); 2374 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2375 2376 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2377 2378 /* 2379 * Use this if we would be adding new items, as we could split nodes as we cow 2380 * down the tree. 2381 */ 2382 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2383 unsigned num_items) 2384 { 2385 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2386 } 2387 2388 /* 2389 * Doing a truncate or a modification won't result in new nodes or leaves, just 2390 * what we need for COW. 2391 */ 2392 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2393 unsigned num_items) 2394 { 2395 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2396 } 2397 2398 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2399 u64 start, u64 num_bytes); 2400 void btrfs_free_excluded_extents(struct btrfs_block_group_cache *cache); 2401 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2402 unsigned long count); 2403 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2404 struct btrfs_delayed_ref_root *delayed_refs, 2405 struct btrfs_delayed_ref_head *head); 2406 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2407 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2408 struct btrfs_fs_info *fs_info, u64 bytenr, 2409 u64 offset, int metadata, u64 *refs, u64 *flags); 2410 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2411 u64 bytenr, u64 num, int reserved); 2412 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2413 u64 bytenr, u64 num_bytes); 2414 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2415 int btrfs_cross_ref_exist(struct btrfs_root *root, 2416 u64 objectid, u64 offset, u64 bytenr); 2417 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2418 struct btrfs_root *root, 2419 u64 parent, u64 root_objectid, 2420 const struct btrfs_disk_key *key, 2421 int level, u64 hint, 2422 u64 empty_size); 2423 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2424 struct btrfs_root *root, 2425 struct extent_buffer *buf, 2426 u64 parent, int last_ref); 2427 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2428 struct btrfs_root *root, u64 owner, 2429 u64 offset, u64 ram_bytes, 2430 struct btrfs_key *ins); 2431 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2432 u64 root_objectid, u64 owner, u64 offset, 2433 struct btrfs_key *ins); 2434 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2435 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2436 struct btrfs_key *ins, int is_data, int delalloc); 2437 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2438 struct extent_buffer *buf, int full_backref); 2439 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2440 struct extent_buffer *buf, int full_backref); 2441 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2442 u64 bytenr, u64 num_bytes, u64 flags, 2443 int level, int is_data); 2444 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2445 2446 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2447 u64 start, u64 len, int delalloc); 2448 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2449 u64 start, u64 len); 2450 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2451 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2452 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2453 struct btrfs_ref *generic_ref); 2454 2455 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2456 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2457 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2458 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2459 2460 enum btrfs_reserve_flush_enum { 2461 /* If we are in the transaction, we can't flush anything.*/ 2462 BTRFS_RESERVE_NO_FLUSH, 2463 /* 2464 * Flushing delalloc may cause deadlock somewhere, in this 2465 * case, use FLUSH LIMIT 2466 */ 2467 BTRFS_RESERVE_FLUSH_LIMIT, 2468 BTRFS_RESERVE_FLUSH_EVICT, 2469 BTRFS_RESERVE_FLUSH_ALL, 2470 }; 2471 2472 enum btrfs_flush_state { 2473 FLUSH_DELAYED_ITEMS_NR = 1, 2474 FLUSH_DELAYED_ITEMS = 2, 2475 FLUSH_DELAYED_REFS_NR = 3, 2476 FLUSH_DELAYED_REFS = 4, 2477 FLUSH_DELALLOC = 5, 2478 FLUSH_DELALLOC_WAIT = 6, 2479 ALLOC_CHUNK = 7, 2480 ALLOC_CHUNK_FORCE = 8, 2481 RUN_DELAYED_IPUTS = 9, 2482 COMMIT_TRANS = 10, 2483 }; 2484 2485 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2486 struct btrfs_block_rsv *rsv, 2487 int nitems, bool use_global_rsv); 2488 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2489 struct btrfs_block_rsv *rsv); 2490 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2491 2492 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2493 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2494 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2495 u64 start, u64 end); 2496 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2497 u64 num_bytes, u64 *actual_bytes); 2498 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2499 2500 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2501 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2502 struct btrfs_fs_info *fs_info); 2503 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2504 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2505 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2506 2507 /* ctree.c */ 2508 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2509 int level, int *slot); 2510 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2511 int btrfs_previous_item(struct btrfs_root *root, 2512 struct btrfs_path *path, u64 min_objectid, 2513 int type); 2514 int btrfs_previous_extent_item(struct btrfs_root *root, 2515 struct btrfs_path *path, u64 min_objectid); 2516 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2517 struct btrfs_path *path, 2518 const struct btrfs_key *new_key); 2519 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2520 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2521 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2522 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2523 struct btrfs_key *key, int lowest_level, 2524 u64 min_trans); 2525 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2526 struct btrfs_path *path, 2527 u64 min_trans); 2528 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2529 int slot); 2530 2531 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2532 struct btrfs_root *root, struct extent_buffer *buf, 2533 struct extent_buffer *parent, int parent_slot, 2534 struct extent_buffer **cow_ret); 2535 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2536 struct btrfs_root *root, 2537 struct extent_buffer *buf, 2538 struct extent_buffer **cow_ret, u64 new_root_objectid); 2539 int btrfs_block_can_be_shared(struct btrfs_root *root, 2540 struct extent_buffer *buf); 2541 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2542 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2543 int btrfs_split_item(struct btrfs_trans_handle *trans, 2544 struct btrfs_root *root, 2545 struct btrfs_path *path, 2546 const struct btrfs_key *new_key, 2547 unsigned long split_offset); 2548 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2549 struct btrfs_root *root, 2550 struct btrfs_path *path, 2551 const struct btrfs_key *new_key); 2552 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2553 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2554 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2555 const struct btrfs_key *key, struct btrfs_path *p, 2556 int ins_len, int cow); 2557 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2558 struct btrfs_path *p, u64 time_seq); 2559 int btrfs_search_slot_for_read(struct btrfs_root *root, 2560 const struct btrfs_key *key, 2561 struct btrfs_path *p, int find_higher, 2562 int return_any); 2563 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2564 struct btrfs_root *root, struct extent_buffer *parent, 2565 int start_slot, u64 *last_ret, 2566 struct btrfs_key *progress); 2567 void btrfs_release_path(struct btrfs_path *p); 2568 struct btrfs_path *btrfs_alloc_path(void); 2569 void btrfs_free_path(struct btrfs_path *p); 2570 void btrfs_set_path_blocking(struct btrfs_path *p); 2571 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2572 2573 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2574 struct btrfs_path *path, int slot, int nr); 2575 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2576 struct btrfs_root *root, 2577 struct btrfs_path *path) 2578 { 2579 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2580 } 2581 2582 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2583 const struct btrfs_key *cpu_key, u32 *data_size, 2584 u32 total_data, u32 total_size, int nr); 2585 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2586 const struct btrfs_key *key, void *data, u32 data_size); 2587 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2588 struct btrfs_root *root, 2589 struct btrfs_path *path, 2590 const struct btrfs_key *cpu_key, u32 *data_size, 2591 int nr); 2592 2593 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2594 struct btrfs_root *root, 2595 struct btrfs_path *path, 2596 const struct btrfs_key *key, 2597 u32 data_size) 2598 { 2599 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2600 } 2601 2602 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2603 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2604 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2605 u64 time_seq); 2606 static inline int btrfs_next_old_item(struct btrfs_root *root, 2607 struct btrfs_path *p, u64 time_seq) 2608 { 2609 ++p->slots[0]; 2610 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2611 return btrfs_next_old_leaf(root, p, time_seq); 2612 return 0; 2613 } 2614 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2615 { 2616 return btrfs_next_old_item(root, p, 0); 2617 } 2618 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2619 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2620 struct btrfs_block_rsv *block_rsv, 2621 int update_ref, int for_reloc); 2622 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2623 struct btrfs_root *root, 2624 struct extent_buffer *node, 2625 struct extent_buffer *parent); 2626 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2627 { 2628 /* 2629 * Do it this way so we only ever do one test_bit in the normal case. 2630 */ 2631 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2632 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2633 return 2; 2634 return 1; 2635 } 2636 return 0; 2637 } 2638 2639 /* 2640 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2641 * anything except sleeping. This function is used to check the status of 2642 * the fs. 2643 */ 2644 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2645 { 2646 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2647 } 2648 2649 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2650 { 2651 kfree(fs_info->balance_ctl); 2652 kfree(fs_info->delayed_root); 2653 kfree(fs_info->extent_root); 2654 kfree(fs_info->tree_root); 2655 kfree(fs_info->chunk_root); 2656 kfree(fs_info->dev_root); 2657 kfree(fs_info->csum_root); 2658 kfree(fs_info->quota_root); 2659 kfree(fs_info->uuid_root); 2660 kfree(fs_info->free_space_root); 2661 kfree(fs_info->super_copy); 2662 kfree(fs_info->super_for_commit); 2663 kvfree(fs_info); 2664 } 2665 2666 /* tree mod log functions from ctree.c */ 2667 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2668 struct seq_list *elem); 2669 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2670 struct seq_list *elem); 2671 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2672 2673 /* root-item.c */ 2674 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2675 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2676 int name_len); 2677 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2678 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2679 int name_len); 2680 int btrfs_del_root(struct btrfs_trans_handle *trans, 2681 const struct btrfs_key *key); 2682 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2683 const struct btrfs_key *key, 2684 struct btrfs_root_item *item); 2685 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2686 struct btrfs_root *root, 2687 struct btrfs_key *key, 2688 struct btrfs_root_item *item); 2689 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2690 struct btrfs_path *path, struct btrfs_root_item *root_item, 2691 struct btrfs_key *root_key); 2692 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2693 void btrfs_set_root_node(struct btrfs_root_item *item, 2694 struct extent_buffer *node); 2695 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2696 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2697 struct btrfs_root *root); 2698 2699 /* uuid-tree.c */ 2700 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2701 u64 subid); 2702 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2703 u64 subid); 2704 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2705 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2706 u64)); 2707 2708 /* dir-item.c */ 2709 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2710 const char *name, int name_len); 2711 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2712 int name_len, struct btrfs_inode *dir, 2713 struct btrfs_key *location, u8 type, u64 index); 2714 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2715 struct btrfs_root *root, 2716 struct btrfs_path *path, u64 dir, 2717 const char *name, int name_len, 2718 int mod); 2719 struct btrfs_dir_item * 2720 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2721 struct btrfs_root *root, 2722 struct btrfs_path *path, u64 dir, 2723 u64 objectid, const char *name, int name_len, 2724 int mod); 2725 struct btrfs_dir_item * 2726 btrfs_search_dir_index_item(struct btrfs_root *root, 2727 struct btrfs_path *path, u64 dirid, 2728 const char *name, int name_len); 2729 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2730 struct btrfs_root *root, 2731 struct btrfs_path *path, 2732 struct btrfs_dir_item *di); 2733 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2734 struct btrfs_root *root, 2735 struct btrfs_path *path, u64 objectid, 2736 const char *name, u16 name_len, 2737 const void *data, u16 data_len); 2738 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2739 struct btrfs_root *root, 2740 struct btrfs_path *path, u64 dir, 2741 const char *name, u16 name_len, 2742 int mod); 2743 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2744 struct btrfs_path *path, 2745 const char *name, 2746 int name_len); 2747 2748 /* orphan.c */ 2749 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2750 struct btrfs_root *root, u64 offset); 2751 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2752 struct btrfs_root *root, u64 offset); 2753 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2754 2755 /* inode-item.c */ 2756 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2757 struct btrfs_root *root, 2758 const char *name, int name_len, 2759 u64 inode_objectid, u64 ref_objectid, u64 index); 2760 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2761 struct btrfs_root *root, 2762 const char *name, int name_len, 2763 u64 inode_objectid, u64 ref_objectid, u64 *index); 2764 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2765 struct btrfs_root *root, 2766 struct btrfs_path *path, u64 objectid); 2767 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2768 *root, struct btrfs_path *path, 2769 struct btrfs_key *location, int mod); 2770 2771 struct btrfs_inode_extref * 2772 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2773 struct btrfs_root *root, 2774 struct btrfs_path *path, 2775 const char *name, int name_len, 2776 u64 inode_objectid, u64 ref_objectid, int ins_len, 2777 int cow); 2778 2779 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2780 int slot, const char *name, 2781 int name_len); 2782 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2783 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2784 const char *name, int name_len); 2785 /* file-item.c */ 2786 struct btrfs_dio_private; 2787 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2788 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 2789 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2790 u8 *dst); 2791 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 2792 u64 logical_offset); 2793 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2794 struct btrfs_root *root, 2795 u64 objectid, u64 pos, 2796 u64 disk_offset, u64 disk_num_bytes, 2797 u64 num_bytes, u64 offset, u64 ram_bytes, 2798 u8 compression, u8 encryption, u16 other_encoding); 2799 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2800 struct btrfs_root *root, 2801 struct btrfs_path *path, u64 objectid, 2802 u64 bytenr, int mod); 2803 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2804 struct btrfs_root *root, 2805 struct btrfs_ordered_sum *sums); 2806 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 2807 u64 file_start, int contig); 2808 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2809 struct list_head *list, int search_commit); 2810 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2811 const struct btrfs_path *path, 2812 struct btrfs_file_extent_item *fi, 2813 const bool new_inline, 2814 struct extent_map *em); 2815 2816 /* inode.c */ 2817 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2818 u64 start, u64 len); 2819 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2820 u64 *orig_start, u64 *orig_block_len, 2821 u64 *ram_bytes); 2822 2823 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2824 struct btrfs_inode *inode); 2825 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2826 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2827 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2828 struct btrfs_root *root, 2829 struct btrfs_inode *dir, struct btrfs_inode *inode, 2830 const char *name, int name_len); 2831 int btrfs_add_link(struct btrfs_trans_handle *trans, 2832 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2833 const char *name, int name_len, int add_backref, u64 index); 2834 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2835 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2836 int front); 2837 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2838 struct btrfs_root *root, 2839 struct inode *inode, u64 new_size, 2840 u32 min_type); 2841 2842 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 2843 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 2844 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2845 unsigned int extra_bits, 2846 struct extent_state **cached_state); 2847 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2848 struct btrfs_root *new_root, 2849 struct btrfs_root *parent_root, 2850 u64 new_dirid); 2851 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 2852 unsigned *bits); 2853 void btrfs_clear_delalloc_extent(struct inode *inode, 2854 struct extent_state *state, unsigned *bits); 2855 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 2856 struct extent_state *other); 2857 void btrfs_split_delalloc_extent(struct inode *inode, 2858 struct extent_state *orig, u64 split); 2859 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 2860 unsigned long bio_flags); 2861 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 2862 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 2863 int btrfs_readpage(struct file *file, struct page *page); 2864 void btrfs_evict_inode(struct inode *inode); 2865 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2866 struct inode *btrfs_alloc_inode(struct super_block *sb); 2867 void btrfs_destroy_inode(struct inode *inode); 2868 void btrfs_free_inode(struct inode *inode); 2869 int btrfs_drop_inode(struct inode *inode); 2870 int __init btrfs_init_cachep(void); 2871 void __cold btrfs_destroy_cachep(void); 2872 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 2873 struct btrfs_root *root, int *new, 2874 struct btrfs_path *path); 2875 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2876 struct btrfs_root *root, int *was_new); 2877 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 2878 struct page *page, size_t pg_offset, 2879 u64 start, u64 end, int create); 2880 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2881 struct btrfs_root *root, 2882 struct inode *inode); 2883 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 2884 struct btrfs_root *root, struct inode *inode); 2885 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 2886 struct btrfs_inode *inode); 2887 int btrfs_orphan_cleanup(struct btrfs_root *root); 2888 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 2889 void btrfs_add_delayed_iput(struct inode *inode); 2890 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 2891 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 2892 int btrfs_prealloc_file_range(struct inode *inode, int mode, 2893 u64 start, u64 num_bytes, u64 min_size, 2894 loff_t actual_len, u64 *alloc_hint); 2895 int btrfs_prealloc_file_range_trans(struct inode *inode, 2896 struct btrfs_trans_handle *trans, int mode, 2897 u64 start, u64 num_bytes, u64 min_size, 2898 loff_t actual_len, u64 *alloc_hint); 2899 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 2900 u64 start, u64 end, int *page_started, unsigned long *nr_written, 2901 struct writeback_control *wbc); 2902 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 2903 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 2904 u64 end, int uptodate); 2905 extern const struct dentry_operations btrfs_dentry_operations; 2906 2907 /* ioctl.c */ 2908 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2909 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2910 int btrfs_ioctl_get_supported_features(void __user *arg); 2911 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 2912 int btrfs_is_empty_uuid(u8 *uuid); 2913 int btrfs_defrag_file(struct inode *inode, struct file *file, 2914 struct btrfs_ioctl_defrag_range_args *range, 2915 u64 newer_than, unsigned long max_pages); 2916 void btrfs_get_block_group_info(struct list_head *groups_list, 2917 struct btrfs_ioctl_space_info *space); 2918 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 2919 struct btrfs_ioctl_balance_args *bargs); 2920 2921 /* file.c */ 2922 int __init btrfs_auto_defrag_init(void); 2923 void __cold btrfs_auto_defrag_exit(void); 2924 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 2925 struct btrfs_inode *inode); 2926 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 2927 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 2928 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 2929 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 2930 int skip_pinned); 2931 extern const struct file_operations btrfs_file_operations; 2932 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 2933 struct btrfs_root *root, struct inode *inode, 2934 struct btrfs_path *path, u64 start, u64 end, 2935 u64 *drop_end, int drop_cache, 2936 int replace_extent, 2937 u32 extent_item_size, 2938 int *key_inserted); 2939 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 2940 struct btrfs_root *root, struct inode *inode, u64 start, 2941 u64 end, int drop_cache); 2942 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, 2943 const u64 start, const u64 end, 2944 struct btrfs_clone_extent_info *clone_info, 2945 struct btrfs_trans_handle **trans_out); 2946 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2947 struct btrfs_inode *inode, u64 start, u64 end); 2948 int btrfs_release_file(struct inode *inode, struct file *file); 2949 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 2950 size_t num_pages, loff_t pos, size_t write_bytes, 2951 struct extent_state **cached); 2952 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 2953 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 2954 struct file *file_out, loff_t pos_out, 2955 loff_t len, unsigned int remap_flags); 2956 2957 /* tree-defrag.c */ 2958 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2959 struct btrfs_root *root); 2960 2961 /* super.c */ 2962 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 2963 unsigned long new_flags); 2964 int btrfs_sync_fs(struct super_block *sb, int wait); 2965 2966 static inline __printf(2, 3) __cold 2967 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 2968 { 2969 } 2970 2971 #ifdef CONFIG_PRINTK 2972 __printf(2, 3) 2973 __cold 2974 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 2975 #else 2976 #define btrfs_printk(fs_info, fmt, args...) \ 2977 btrfs_no_printk(fs_info, fmt, ##args) 2978 #endif 2979 2980 #define btrfs_emerg(fs_info, fmt, args...) \ 2981 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 2982 #define btrfs_alert(fs_info, fmt, args...) \ 2983 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 2984 #define btrfs_crit(fs_info, fmt, args...) \ 2985 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 2986 #define btrfs_err(fs_info, fmt, args...) \ 2987 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 2988 #define btrfs_warn(fs_info, fmt, args...) \ 2989 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 2990 #define btrfs_notice(fs_info, fmt, args...) \ 2991 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 2992 #define btrfs_info(fs_info, fmt, args...) \ 2993 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 2994 2995 /* 2996 * Wrappers that use printk_in_rcu 2997 */ 2998 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 2999 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3000 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3001 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3002 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3003 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3004 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3005 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3006 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3007 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3008 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3009 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3010 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3011 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3012 3013 /* 3014 * Wrappers that use a ratelimited printk_in_rcu 3015 */ 3016 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3017 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3018 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3019 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3020 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3021 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3022 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3023 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3024 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3025 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3026 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3027 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3028 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3029 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3030 3031 /* 3032 * Wrappers that use a ratelimited printk 3033 */ 3034 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3035 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3036 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3037 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3038 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3039 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3040 #define btrfs_err_rl(fs_info, fmt, args...) \ 3041 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3042 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3043 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3044 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3045 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3046 #define btrfs_info_rl(fs_info, fmt, args...) \ 3047 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3048 3049 #if defined(CONFIG_DYNAMIC_DEBUG) 3050 #define btrfs_debug(fs_info, fmt, args...) \ 3051 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3052 fs_info, KERN_DEBUG fmt, ##args) 3053 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3054 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3055 fs_info, KERN_DEBUG fmt, ##args) 3056 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3057 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3058 fs_info, KERN_DEBUG fmt, ##args) 3059 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3060 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3061 fs_info, KERN_DEBUG fmt, ##args) 3062 #elif defined(DEBUG) 3063 #define btrfs_debug(fs_info, fmt, args...) \ 3064 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3065 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3066 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3067 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3068 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3069 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3070 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3071 #else 3072 #define btrfs_debug(fs_info, fmt, args...) \ 3073 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3074 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3075 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3076 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3077 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3078 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3079 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3080 #endif 3081 3082 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3083 do { \ 3084 rcu_read_lock(); \ 3085 btrfs_printk(fs_info, fmt, ##args); \ 3086 rcu_read_unlock(); \ 3087 } while (0) 3088 3089 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3090 do { \ 3091 rcu_read_lock(); \ 3092 btrfs_no_printk(fs_info, fmt, ##args); \ 3093 rcu_read_unlock(); \ 3094 } while (0) 3095 3096 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3097 do { \ 3098 static DEFINE_RATELIMIT_STATE(_rs, \ 3099 DEFAULT_RATELIMIT_INTERVAL, \ 3100 DEFAULT_RATELIMIT_BURST); \ 3101 if (__ratelimit(&_rs)) \ 3102 btrfs_printk(fs_info, fmt, ##args); \ 3103 } while (0) 3104 3105 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3106 do { \ 3107 rcu_read_lock(); \ 3108 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3109 rcu_read_unlock(); \ 3110 } while (0) 3111 3112 __cold 3113 static inline void assfail(const char *expr, const char *file, int line) 3114 { 3115 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { 3116 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3117 BUG(); 3118 } 3119 } 3120 3121 #define ASSERT(expr) \ 3122 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3123 3124 /* 3125 * Use that for functions that are conditionally exported for sanity tests but 3126 * otherwise static 3127 */ 3128 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3129 #define EXPORT_FOR_TESTS static 3130 #else 3131 #define EXPORT_FOR_TESTS 3132 #endif 3133 3134 __cold 3135 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3136 { 3137 btrfs_err(fs_info, 3138 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3139 } 3140 3141 __printf(5, 6) 3142 __cold 3143 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3144 unsigned int line, int errno, const char *fmt, ...); 3145 3146 const char *btrfs_decode_error(int errno); 3147 3148 __cold 3149 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3150 const char *function, 3151 unsigned int line, int errno); 3152 3153 /* 3154 * Call btrfs_abort_transaction as early as possible when an error condition is 3155 * detected, that way the exact line number is reported. 3156 */ 3157 #define btrfs_abort_transaction(trans, errno) \ 3158 do { \ 3159 /* Report first abort since mount */ \ 3160 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3161 &((trans)->fs_info->fs_state))) { \ 3162 if ((errno) != -EIO) { \ 3163 WARN(1, KERN_DEBUG \ 3164 "BTRFS: Transaction aborted (error %d)\n", \ 3165 (errno)); \ 3166 } else { \ 3167 btrfs_debug((trans)->fs_info, \ 3168 "Transaction aborted (error %d)", \ 3169 (errno)); \ 3170 } \ 3171 } \ 3172 __btrfs_abort_transaction((trans), __func__, \ 3173 __LINE__, (errno)); \ 3174 } while (0) 3175 3176 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3177 do { \ 3178 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3179 (errno), fmt, ##args); \ 3180 } while (0) 3181 3182 __printf(5, 6) 3183 __cold 3184 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3185 unsigned int line, int errno, const char *fmt, ...); 3186 /* 3187 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3188 * will panic(). Otherwise we BUG() here. 3189 */ 3190 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3191 do { \ 3192 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3193 BUG(); \ 3194 } while (0) 3195 3196 3197 /* compatibility and incompatibility defines */ 3198 3199 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3200 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3201 #opt) 3202 3203 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3204 u64 flag, const char* name) 3205 { 3206 struct btrfs_super_block *disk_super; 3207 u64 features; 3208 3209 disk_super = fs_info->super_copy; 3210 features = btrfs_super_incompat_flags(disk_super); 3211 if (!(features & flag)) { 3212 spin_lock(&fs_info->super_lock); 3213 features = btrfs_super_incompat_flags(disk_super); 3214 if (!(features & flag)) { 3215 features |= flag; 3216 btrfs_set_super_incompat_flags(disk_super, features); 3217 btrfs_info(fs_info, 3218 "setting incompat feature flag for %s (0x%llx)", 3219 name, flag); 3220 } 3221 spin_unlock(&fs_info->super_lock); 3222 } 3223 } 3224 3225 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3226 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3227 #opt) 3228 3229 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3230 u64 flag, const char* name) 3231 { 3232 struct btrfs_super_block *disk_super; 3233 u64 features; 3234 3235 disk_super = fs_info->super_copy; 3236 features = btrfs_super_incompat_flags(disk_super); 3237 if (features & flag) { 3238 spin_lock(&fs_info->super_lock); 3239 features = btrfs_super_incompat_flags(disk_super); 3240 if (features & flag) { 3241 features &= ~flag; 3242 btrfs_set_super_incompat_flags(disk_super, features); 3243 btrfs_info(fs_info, 3244 "clearing incompat feature flag for %s (0x%llx)", 3245 name, flag); 3246 } 3247 spin_unlock(&fs_info->super_lock); 3248 } 3249 } 3250 3251 #define btrfs_fs_incompat(fs_info, opt) \ 3252 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3253 3254 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3255 { 3256 struct btrfs_super_block *disk_super; 3257 disk_super = fs_info->super_copy; 3258 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3259 } 3260 3261 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3262 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3263 #opt) 3264 3265 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3266 u64 flag, const char *name) 3267 { 3268 struct btrfs_super_block *disk_super; 3269 u64 features; 3270 3271 disk_super = fs_info->super_copy; 3272 features = btrfs_super_compat_ro_flags(disk_super); 3273 if (!(features & flag)) { 3274 spin_lock(&fs_info->super_lock); 3275 features = btrfs_super_compat_ro_flags(disk_super); 3276 if (!(features & flag)) { 3277 features |= flag; 3278 btrfs_set_super_compat_ro_flags(disk_super, features); 3279 btrfs_info(fs_info, 3280 "setting compat-ro feature flag for %s (0x%llx)", 3281 name, flag); 3282 } 3283 spin_unlock(&fs_info->super_lock); 3284 } 3285 } 3286 3287 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3288 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3289 #opt) 3290 3291 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3292 u64 flag, const char *name) 3293 { 3294 struct btrfs_super_block *disk_super; 3295 u64 features; 3296 3297 disk_super = fs_info->super_copy; 3298 features = btrfs_super_compat_ro_flags(disk_super); 3299 if (features & flag) { 3300 spin_lock(&fs_info->super_lock); 3301 features = btrfs_super_compat_ro_flags(disk_super); 3302 if (features & flag) { 3303 features &= ~flag; 3304 btrfs_set_super_compat_ro_flags(disk_super, features); 3305 btrfs_info(fs_info, 3306 "clearing compat-ro feature flag for %s (0x%llx)", 3307 name, flag); 3308 } 3309 spin_unlock(&fs_info->super_lock); 3310 } 3311 } 3312 3313 #define btrfs_fs_compat_ro(fs_info, opt) \ 3314 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3315 3316 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3317 { 3318 struct btrfs_super_block *disk_super; 3319 disk_super = fs_info->super_copy; 3320 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3321 } 3322 3323 /* acl.c */ 3324 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3325 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3326 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3327 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3328 struct inode *inode, struct inode *dir); 3329 #else 3330 #define btrfs_get_acl NULL 3331 #define btrfs_set_acl NULL 3332 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3333 struct inode *inode, struct inode *dir) 3334 { 3335 return 0; 3336 } 3337 #endif 3338 3339 /* relocation.c */ 3340 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3341 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3342 struct btrfs_root *root); 3343 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3344 struct btrfs_root *root); 3345 int btrfs_recover_relocation(struct btrfs_root *root); 3346 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3347 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3348 struct btrfs_root *root, struct extent_buffer *buf, 3349 struct extent_buffer *cow); 3350 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3351 u64 *bytes_to_reserve); 3352 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3353 struct btrfs_pending_snapshot *pending); 3354 3355 /* scrub.c */ 3356 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3357 u64 end, struct btrfs_scrub_progress *progress, 3358 int readonly, int is_dev_replace); 3359 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3360 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3361 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3362 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3363 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3364 struct btrfs_scrub_progress *progress); 3365 static inline void btrfs_init_full_stripe_locks_tree( 3366 struct btrfs_full_stripe_locks_tree *locks_root) 3367 { 3368 locks_root->root = RB_ROOT; 3369 mutex_init(&locks_root->lock); 3370 } 3371 3372 /* dev-replace.c */ 3373 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3374 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3375 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3376 3377 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3378 { 3379 btrfs_bio_counter_sub(fs_info, 1); 3380 } 3381 3382 /* reada.c */ 3383 struct reada_control { 3384 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3385 struct btrfs_key key_start; 3386 struct btrfs_key key_end; /* exclusive */ 3387 atomic_t elems; 3388 struct kref refcnt; 3389 wait_queue_head_t wait; 3390 }; 3391 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3392 struct btrfs_key *start, struct btrfs_key *end); 3393 int btrfs_reada_wait(void *handle); 3394 void btrfs_reada_detach(void *handle); 3395 int btree_readahead_hook(struct extent_buffer *eb, int err); 3396 3397 static inline int is_fstree(u64 rootid) 3398 { 3399 if (rootid == BTRFS_FS_TREE_OBJECTID || 3400 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3401 !btrfs_qgroup_level(rootid))) 3402 return 1; 3403 return 0; 3404 } 3405 3406 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3407 { 3408 return signal_pending(current); 3409 } 3410 3411 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3412 3413 /* Sanity test specific functions */ 3414 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3415 void btrfs_test_inode_set_ops(struct inode *inode); 3416 void btrfs_test_destroy_inode(struct inode *inode); 3417 3418 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3419 { 3420 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3421 } 3422 #else 3423 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3424 { 3425 return 0; 3426 } 3427 #endif 3428 3429 #endif 3430