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 /* the extent workers do delayed refs on the extent allocation tree */ 738 struct btrfs_workqueue *extent_workers; 739 struct task_struct *transaction_kthread; 740 struct task_struct *cleaner_kthread; 741 u32 thread_pool_size; 742 743 struct kobject *space_info_kobj; 744 745 u64 total_pinned; 746 747 /* used to keep from writing metadata until there is a nice batch */ 748 struct percpu_counter dirty_metadata_bytes; 749 struct percpu_counter delalloc_bytes; 750 struct percpu_counter dio_bytes; 751 s32 dirty_metadata_batch; 752 s32 delalloc_batch; 753 754 struct list_head dirty_cowonly_roots; 755 756 struct btrfs_fs_devices *fs_devices; 757 758 /* 759 * The space_info list is effectively read only after initial 760 * setup. It is populated at mount time and cleaned up after 761 * all block groups are removed. RCU is used to protect it. 762 */ 763 struct list_head space_info; 764 765 struct btrfs_space_info *data_sinfo; 766 767 struct reloc_control *reloc_ctl; 768 769 /* data_alloc_cluster is only used in ssd_spread mode */ 770 struct btrfs_free_cluster data_alloc_cluster; 771 772 /* all metadata allocations go through this cluster */ 773 struct btrfs_free_cluster meta_alloc_cluster; 774 775 /* auto defrag inodes go here */ 776 spinlock_t defrag_inodes_lock; 777 struct rb_root defrag_inodes; 778 atomic_t defrag_running; 779 780 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 781 seqlock_t profiles_lock; 782 /* 783 * these three are in extended format (availability of single 784 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 785 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 786 */ 787 u64 avail_data_alloc_bits; 788 u64 avail_metadata_alloc_bits; 789 u64 avail_system_alloc_bits; 790 791 /* restriper state */ 792 spinlock_t balance_lock; 793 struct mutex balance_mutex; 794 atomic_t balance_pause_req; 795 atomic_t balance_cancel_req; 796 struct btrfs_balance_control *balance_ctl; 797 wait_queue_head_t balance_wait_q; 798 799 u32 data_chunk_allocations; 800 u32 metadata_ratio; 801 802 void *bdev_holder; 803 804 /* private scrub information */ 805 struct mutex scrub_lock; 806 atomic_t scrubs_running; 807 atomic_t scrub_pause_req; 808 atomic_t scrubs_paused; 809 atomic_t scrub_cancel_req; 810 wait_queue_head_t scrub_pause_wait; 811 /* 812 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 813 * running. 814 */ 815 refcount_t scrub_workers_refcnt; 816 struct btrfs_workqueue *scrub_workers; 817 struct btrfs_workqueue *scrub_wr_completion_workers; 818 struct btrfs_workqueue *scrub_parity_workers; 819 820 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 821 u32 check_integrity_print_mask; 822 #endif 823 /* is qgroup tracking in a consistent state? */ 824 u64 qgroup_flags; 825 826 /* holds configuration and tracking. Protected by qgroup_lock */ 827 struct rb_root qgroup_tree; 828 spinlock_t qgroup_lock; 829 830 /* 831 * used to avoid frequently calling ulist_alloc()/ulist_free() 832 * when doing qgroup accounting, it must be protected by qgroup_lock. 833 */ 834 struct ulist *qgroup_ulist; 835 836 /* protect user change for quota operations */ 837 struct mutex qgroup_ioctl_lock; 838 839 /* list of dirty qgroups to be written at next commit */ 840 struct list_head dirty_qgroups; 841 842 /* used by qgroup for an efficient tree traversal */ 843 u64 qgroup_seq; 844 845 /* qgroup rescan items */ 846 struct mutex qgroup_rescan_lock; /* protects the progress item */ 847 struct btrfs_key qgroup_rescan_progress; 848 struct btrfs_workqueue *qgroup_rescan_workers; 849 struct completion qgroup_rescan_completion; 850 struct btrfs_work qgroup_rescan_work; 851 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 852 853 /* filesystem state */ 854 unsigned long fs_state; 855 856 struct btrfs_delayed_root *delayed_root; 857 858 /* readahead tree */ 859 spinlock_t reada_lock; 860 struct radix_tree_root reada_tree; 861 862 /* readahead works cnt */ 863 atomic_t reada_works_cnt; 864 865 /* Extent buffer radix tree */ 866 spinlock_t buffer_lock; 867 struct radix_tree_root buffer_radix; 868 869 /* next backup root to be overwritten */ 870 int backup_root_index; 871 872 /* device replace state */ 873 struct btrfs_dev_replace dev_replace; 874 875 struct semaphore uuid_tree_rescan_sem; 876 877 /* Used to reclaim the metadata space in the background. */ 878 struct work_struct async_reclaim_work; 879 880 spinlock_t unused_bgs_lock; 881 struct list_head unused_bgs; 882 struct mutex unused_bg_unpin_mutex; 883 struct mutex delete_unused_bgs_mutex; 884 885 /* Cached block sizes */ 886 u32 nodesize; 887 u32 sectorsize; 888 u32 stripesize; 889 890 /* Block groups and devices containing active swapfiles. */ 891 spinlock_t swapfile_pins_lock; 892 struct rb_root swapfile_pins; 893 894 struct crypto_shash *csum_shash; 895 896 /* 897 * Number of send operations in progress. 898 * Updated while holding fs_info::balance_mutex. 899 */ 900 int send_in_progress; 901 902 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 903 spinlock_t ref_verify_lock; 904 struct rb_root block_tree; 905 #endif 906 }; 907 908 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 909 { 910 return sb->s_fs_info; 911 } 912 913 struct btrfs_subvolume_writers { 914 struct percpu_counter counter; 915 wait_queue_head_t wait; 916 }; 917 918 /* 919 * The state of btrfs root 920 */ 921 enum { 922 /* 923 * btrfs_record_root_in_trans is a multi-step process, and it can race 924 * with the balancing code. But the race is very small, and only the 925 * first time the root is added to each transaction. So IN_TRANS_SETUP 926 * is used to tell us when more checks are required 927 */ 928 BTRFS_ROOT_IN_TRANS_SETUP, 929 BTRFS_ROOT_REF_COWS, 930 BTRFS_ROOT_TRACK_DIRTY, 931 BTRFS_ROOT_IN_RADIX, 932 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 933 BTRFS_ROOT_DEFRAG_RUNNING, 934 BTRFS_ROOT_FORCE_COW, 935 BTRFS_ROOT_MULTI_LOG_TASKS, 936 BTRFS_ROOT_DIRTY, 937 BTRFS_ROOT_DELETING, 938 939 /* 940 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 941 * 942 * Set for the subvolume tree owning the reloc tree. 943 */ 944 BTRFS_ROOT_DEAD_RELOC_TREE, 945 /* Mark dead root stored on device whose cleanup needs to be resumed */ 946 BTRFS_ROOT_DEAD_TREE, 947 }; 948 949 /* 950 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 951 * code. For detail check comment in fs/btrfs/qgroup.c. 952 */ 953 struct btrfs_qgroup_swapped_blocks { 954 spinlock_t lock; 955 /* RM_EMPTY_ROOT() of above blocks[] */ 956 bool swapped; 957 struct rb_root blocks[BTRFS_MAX_LEVEL]; 958 }; 959 960 /* 961 * in ram representation of the tree. extent_root is used for all allocations 962 * and for the extent tree extent_root root. 963 */ 964 struct btrfs_root { 965 struct extent_buffer *node; 966 967 struct extent_buffer *commit_root; 968 struct btrfs_root *log_root; 969 struct btrfs_root *reloc_root; 970 971 unsigned long state; 972 struct btrfs_root_item root_item; 973 struct btrfs_key root_key; 974 struct btrfs_fs_info *fs_info; 975 struct extent_io_tree dirty_log_pages; 976 977 struct mutex objectid_mutex; 978 979 spinlock_t accounting_lock; 980 struct btrfs_block_rsv *block_rsv; 981 982 /* free ino cache stuff */ 983 struct btrfs_free_space_ctl *free_ino_ctl; 984 enum btrfs_caching_type ino_cache_state; 985 spinlock_t ino_cache_lock; 986 wait_queue_head_t ino_cache_wait; 987 struct btrfs_free_space_ctl *free_ino_pinned; 988 u64 ino_cache_progress; 989 struct inode *ino_cache_inode; 990 991 struct mutex log_mutex; 992 wait_queue_head_t log_writer_wait; 993 wait_queue_head_t log_commit_wait[2]; 994 struct list_head log_ctxs[2]; 995 atomic_t log_writers; 996 atomic_t log_commit[2]; 997 atomic_t log_batch; 998 int log_transid; 999 /* No matter the commit succeeds or not*/ 1000 int log_transid_committed; 1001 /* Just be updated when the commit succeeds. */ 1002 int last_log_commit; 1003 pid_t log_start_pid; 1004 1005 u64 last_trans; 1006 1007 u32 type; 1008 1009 u64 highest_objectid; 1010 1011 u64 defrag_trans_start; 1012 struct btrfs_key defrag_progress; 1013 struct btrfs_key defrag_max; 1014 1015 /* the dirty list is only used by non-reference counted roots */ 1016 struct list_head dirty_list; 1017 1018 struct list_head root_list; 1019 1020 spinlock_t log_extents_lock[2]; 1021 struct list_head logged_list[2]; 1022 1023 int orphan_cleanup_state; 1024 1025 spinlock_t inode_lock; 1026 /* red-black tree that keeps track of in-memory inodes */ 1027 struct rb_root inode_tree; 1028 1029 /* 1030 * radix tree that keeps track of delayed nodes of every inode, 1031 * protected by inode_lock 1032 */ 1033 struct radix_tree_root delayed_nodes_tree; 1034 /* 1035 * right now this just gets used so that a root has its own devid 1036 * for stat. It may be used for more later 1037 */ 1038 dev_t anon_dev; 1039 1040 spinlock_t root_item_lock; 1041 refcount_t refs; 1042 1043 struct mutex delalloc_mutex; 1044 spinlock_t delalloc_lock; 1045 /* 1046 * all of the inodes that have delalloc bytes. It is possible for 1047 * this list to be empty even when there is still dirty data=ordered 1048 * extents waiting to finish IO. 1049 */ 1050 struct list_head delalloc_inodes; 1051 struct list_head delalloc_root; 1052 u64 nr_delalloc_inodes; 1053 1054 struct mutex ordered_extent_mutex; 1055 /* 1056 * this is used by the balancing code to wait for all the pending 1057 * ordered extents 1058 */ 1059 spinlock_t ordered_extent_lock; 1060 1061 /* 1062 * all of the data=ordered extents pending writeback 1063 * these can span multiple transactions and basically include 1064 * every dirty data page that isn't from nodatacow 1065 */ 1066 struct list_head ordered_extents; 1067 struct list_head ordered_root; 1068 u64 nr_ordered_extents; 1069 1070 /* 1071 * Not empty if this subvolume root has gone through tree block swap 1072 * (relocation) 1073 * 1074 * Will be used by reloc_control::dirty_subvol_roots. 1075 */ 1076 struct list_head reloc_dirty_list; 1077 1078 /* 1079 * Number of currently running SEND ioctls to prevent 1080 * manipulation with the read-only status via SUBVOL_SETFLAGS 1081 */ 1082 int send_in_progress; 1083 /* 1084 * Number of currently running deduplication operations that have a 1085 * destination inode belonging to this root. Protected by the lock 1086 * root_item_lock. 1087 */ 1088 int dedupe_in_progress; 1089 struct btrfs_subvolume_writers *subv_writers; 1090 atomic_t will_be_snapshotted; 1091 atomic_t snapshot_force_cow; 1092 1093 /* For qgroup metadata reserved space */ 1094 spinlock_t qgroup_meta_rsv_lock; 1095 u64 qgroup_meta_rsv_pertrans; 1096 u64 qgroup_meta_rsv_prealloc; 1097 1098 /* Number of active swapfiles */ 1099 atomic_t nr_swapfiles; 1100 1101 /* Record pairs of swapped blocks for qgroup */ 1102 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1103 1104 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1105 u64 alloc_bytenr; 1106 #endif 1107 }; 1108 1109 struct btrfs_clone_extent_info { 1110 u64 disk_offset; 1111 u64 disk_len; 1112 u64 data_offset; 1113 u64 data_len; 1114 u64 file_offset; 1115 char *extent_buf; 1116 u32 item_size; 1117 }; 1118 1119 struct btrfs_file_private { 1120 void *filldir_buf; 1121 }; 1122 1123 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1124 { 1125 return btrfs_sb(inode->i_sb)->sectorsize; 1126 } 1127 1128 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1129 { 1130 1131 return info->nodesize - sizeof(struct btrfs_header); 1132 } 1133 1134 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1135 1136 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1137 { 1138 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1139 } 1140 1141 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1142 { 1143 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1144 } 1145 1146 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1147 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1148 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1149 { 1150 return BTRFS_MAX_ITEM_SIZE(info) - 1151 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1152 } 1153 1154 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1155 { 1156 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1157 } 1158 1159 /* 1160 * Flags for mount options. 1161 * 1162 * Note: don't forget to add new options to btrfs_show_options() 1163 */ 1164 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1165 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1166 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1167 #define BTRFS_MOUNT_SSD (1 << 3) 1168 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1169 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1170 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1171 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1172 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1173 #define BTRFS_MOUNT_NOSSD (1 << 9) 1174 #define BTRFS_MOUNT_DISCARD (1 << 10) 1175 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1176 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1177 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1178 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1179 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1180 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1181 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1182 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1183 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1184 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1185 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1186 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1187 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1188 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1189 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1190 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1191 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1192 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1193 1194 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1195 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1196 1197 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1198 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1199 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1200 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1201 BTRFS_MOUNT_##opt) 1202 1203 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1204 { \ 1205 if (!btrfs_test_opt(fs_info, opt)) \ 1206 btrfs_info(fs_info, fmt, ##args); \ 1207 btrfs_set_opt(fs_info->mount_opt, opt); \ 1208 } 1209 1210 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1211 { \ 1212 if (btrfs_test_opt(fs_info, opt)) \ 1213 btrfs_info(fs_info, fmt, ##args); \ 1214 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1215 } 1216 1217 /* 1218 * Requests for changes that need to be done during transaction commit. 1219 * 1220 * Internal mount options that are used for special handling of the real 1221 * mount options (eg. cannot be set during remount and have to be set during 1222 * transaction commit) 1223 */ 1224 1225 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1226 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1227 #define BTRFS_PENDING_COMMIT (2) 1228 1229 #define btrfs_test_pending(info, opt) \ 1230 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1231 #define btrfs_set_pending(info, opt) \ 1232 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1233 #define btrfs_clear_pending(info, opt) \ 1234 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1235 1236 /* 1237 * Helpers for setting pending mount option changes. 1238 * 1239 * Expects corresponding macros 1240 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1241 */ 1242 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1243 do { \ 1244 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1245 btrfs_info((info), fmt, ##args); \ 1246 btrfs_set_pending((info), SET_##opt); \ 1247 btrfs_clear_pending((info), CLEAR_##opt); \ 1248 } \ 1249 } while(0) 1250 1251 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1252 do { \ 1253 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1254 btrfs_info((info), fmt, ##args); \ 1255 btrfs_set_pending((info), CLEAR_##opt); \ 1256 btrfs_clear_pending((info), SET_##opt); \ 1257 } \ 1258 } while(0) 1259 1260 /* 1261 * Inode flags 1262 */ 1263 #define BTRFS_INODE_NODATASUM (1 << 0) 1264 #define BTRFS_INODE_NODATACOW (1 << 1) 1265 #define BTRFS_INODE_READONLY (1 << 2) 1266 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1267 #define BTRFS_INODE_PREALLOC (1 << 4) 1268 #define BTRFS_INODE_SYNC (1 << 5) 1269 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1270 #define BTRFS_INODE_APPEND (1 << 7) 1271 #define BTRFS_INODE_NODUMP (1 << 8) 1272 #define BTRFS_INODE_NOATIME (1 << 9) 1273 #define BTRFS_INODE_DIRSYNC (1 << 10) 1274 #define BTRFS_INODE_COMPRESS (1 << 11) 1275 1276 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1277 1278 #define BTRFS_INODE_FLAG_MASK \ 1279 (BTRFS_INODE_NODATASUM | \ 1280 BTRFS_INODE_NODATACOW | \ 1281 BTRFS_INODE_READONLY | \ 1282 BTRFS_INODE_NOCOMPRESS | \ 1283 BTRFS_INODE_PREALLOC | \ 1284 BTRFS_INODE_SYNC | \ 1285 BTRFS_INODE_IMMUTABLE | \ 1286 BTRFS_INODE_APPEND | \ 1287 BTRFS_INODE_NODUMP | \ 1288 BTRFS_INODE_NOATIME | \ 1289 BTRFS_INODE_DIRSYNC | \ 1290 BTRFS_INODE_COMPRESS | \ 1291 BTRFS_INODE_ROOT_ITEM_INIT) 1292 1293 struct btrfs_map_token { 1294 const struct extent_buffer *eb; 1295 char *kaddr; 1296 unsigned long offset; 1297 }; 1298 1299 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1300 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1301 1302 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1303 struct extent_buffer *eb) 1304 { 1305 token->eb = eb; 1306 token->kaddr = NULL; 1307 } 1308 1309 /* some macros to generate set/get functions for the struct fields. This 1310 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1311 * one for u8: 1312 */ 1313 #define le8_to_cpu(v) (v) 1314 #define cpu_to_le8(v) (v) 1315 #define __le8 u8 1316 1317 #define read_eb_member(eb, ptr, type, member, result) (\ 1318 read_extent_buffer(eb, (char *)(result), \ 1319 ((unsigned long)(ptr)) + \ 1320 offsetof(type, member), \ 1321 sizeof(((type *)0)->member))) 1322 1323 #define write_eb_member(eb, ptr, type, member, result) (\ 1324 write_extent_buffer(eb, (char *)(result), \ 1325 ((unsigned long)(ptr)) + \ 1326 offsetof(type, member), \ 1327 sizeof(((type *)0)->member))) 1328 1329 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1330 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1331 const void *ptr, unsigned long off, \ 1332 struct btrfs_map_token *token); \ 1333 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1334 unsigned long off, u##bits val, \ 1335 struct btrfs_map_token *token); \ 1336 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1337 const void *ptr, unsigned long off); \ 1338 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1339 unsigned long off, u##bits val); 1340 1341 DECLARE_BTRFS_SETGET_BITS(8) 1342 DECLARE_BTRFS_SETGET_BITS(16) 1343 DECLARE_BTRFS_SETGET_BITS(32) 1344 DECLARE_BTRFS_SETGET_BITS(64) 1345 1346 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1347 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1348 const type *s) \ 1349 { \ 1350 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1351 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1352 } \ 1353 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1354 u##bits val) \ 1355 { \ 1356 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1357 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1358 } \ 1359 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1360 const type *s, \ 1361 struct btrfs_map_token *token) \ 1362 { \ 1363 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1364 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1365 } \ 1366 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1367 type *s, u##bits val, \ 1368 struct btrfs_map_token *token) \ 1369 { \ 1370 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1371 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1372 } 1373 1374 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1375 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1376 { \ 1377 const type *p = page_address(eb->pages[0]); \ 1378 u##bits res = le##bits##_to_cpu(p->member); \ 1379 return res; \ 1380 } \ 1381 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1382 u##bits val) \ 1383 { \ 1384 type *p = page_address(eb->pages[0]); \ 1385 p->member = cpu_to_le##bits(val); \ 1386 } 1387 1388 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1389 static inline u##bits btrfs_##name(const type *s) \ 1390 { \ 1391 return le##bits##_to_cpu(s->member); \ 1392 } \ 1393 static inline void btrfs_set_##name(type *s, u##bits val) \ 1394 { \ 1395 s->member = cpu_to_le##bits(val); \ 1396 } 1397 1398 1399 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1400 struct btrfs_dev_item *s) 1401 { 1402 BUILD_BUG_ON(sizeof(u64) != 1403 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1404 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1405 total_bytes)); 1406 } 1407 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1408 struct btrfs_dev_item *s, 1409 u64 val) 1410 { 1411 BUILD_BUG_ON(sizeof(u64) != 1412 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1413 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1414 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1415 } 1416 1417 1418 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1419 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1420 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1421 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1422 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1423 start_offset, 64); 1424 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1425 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1426 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1427 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1428 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1429 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1430 1431 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1432 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1433 total_bytes, 64); 1434 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1435 bytes_used, 64); 1436 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1437 io_align, 32); 1438 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1439 io_width, 32); 1440 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1441 sector_size, 32); 1442 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1443 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1444 dev_group, 32); 1445 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1446 seek_speed, 8); 1447 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1448 bandwidth, 8); 1449 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1450 generation, 64); 1451 1452 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1453 { 1454 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1455 } 1456 1457 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1458 { 1459 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1460 } 1461 1462 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1463 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1464 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1465 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1466 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1467 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1468 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1469 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1470 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1471 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1472 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1473 1474 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1475 { 1476 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1477 } 1478 1479 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1480 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1481 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1482 stripe_len, 64); 1483 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1484 io_align, 32); 1485 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1486 io_width, 32); 1487 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1488 sector_size, 32); 1489 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1490 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1491 num_stripes, 16); 1492 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1493 sub_stripes, 16); 1494 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1495 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1496 1497 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1498 int nr) 1499 { 1500 unsigned long offset = (unsigned long)c; 1501 offset += offsetof(struct btrfs_chunk, stripe); 1502 offset += nr * sizeof(struct btrfs_stripe); 1503 return (struct btrfs_stripe *)offset; 1504 } 1505 1506 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1507 { 1508 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1509 } 1510 1511 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1512 struct btrfs_chunk *c, int nr) 1513 { 1514 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1515 } 1516 1517 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1518 struct btrfs_chunk *c, int nr) 1519 { 1520 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1521 } 1522 1523 /* struct btrfs_block_group_item */ 1524 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1525 used, 64); 1526 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1527 used, 64); 1528 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1529 struct btrfs_block_group_item, chunk_objectid, 64); 1530 1531 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1532 struct btrfs_block_group_item, chunk_objectid, 64); 1533 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1534 struct btrfs_block_group_item, flags, 64); 1535 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1536 struct btrfs_block_group_item, flags, 64); 1537 1538 /* struct btrfs_free_space_info */ 1539 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1540 extent_count, 32); 1541 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1542 1543 /* struct btrfs_inode_ref */ 1544 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1545 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1546 1547 /* struct btrfs_inode_extref */ 1548 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1549 parent_objectid, 64); 1550 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1551 name_len, 16); 1552 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1553 1554 /* struct btrfs_inode_item */ 1555 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1556 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1557 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1558 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1559 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1560 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1561 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1562 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1563 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1564 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1565 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1566 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1567 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1568 generation, 64); 1569 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1570 sequence, 64); 1571 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1572 transid, 64); 1573 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1574 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1575 nbytes, 64); 1576 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1577 block_group, 64); 1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1579 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1581 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1582 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1583 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1584 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1585 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1586 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1587 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1588 1589 /* struct btrfs_dev_extent */ 1590 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1591 chunk_tree, 64); 1592 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1593 chunk_objectid, 64); 1594 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1595 chunk_offset, 64); 1596 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1597 1598 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1599 { 1600 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1601 return (unsigned long)dev + ptr; 1602 } 1603 1604 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1605 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1606 generation, 64); 1607 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1608 1609 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1610 1611 1612 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1613 1614 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1615 struct btrfs_tree_block_info *item, 1616 struct btrfs_disk_key *key) 1617 { 1618 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1619 } 1620 1621 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1622 struct btrfs_tree_block_info *item, 1623 struct btrfs_disk_key *key) 1624 { 1625 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1626 } 1627 1628 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1629 root, 64); 1630 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1631 objectid, 64); 1632 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1633 offset, 64); 1634 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1635 count, 32); 1636 1637 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1638 count, 32); 1639 1640 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1641 type, 8); 1642 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1643 offset, 64); 1644 1645 static inline u32 btrfs_extent_inline_ref_size(int type) 1646 { 1647 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1648 type == BTRFS_SHARED_BLOCK_REF_KEY) 1649 return sizeof(struct btrfs_extent_inline_ref); 1650 if (type == BTRFS_SHARED_DATA_REF_KEY) 1651 return sizeof(struct btrfs_shared_data_ref) + 1652 sizeof(struct btrfs_extent_inline_ref); 1653 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1654 return sizeof(struct btrfs_extent_data_ref) + 1655 offsetof(struct btrfs_extent_inline_ref, offset); 1656 return 0; 1657 } 1658 1659 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1660 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1661 generation, 64); 1662 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1663 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1664 1665 /* struct btrfs_node */ 1666 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1667 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1668 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1669 blockptr, 64); 1670 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1671 generation, 64); 1672 1673 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1674 { 1675 unsigned long ptr; 1676 ptr = offsetof(struct btrfs_node, ptrs) + 1677 sizeof(struct btrfs_key_ptr) * nr; 1678 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1679 } 1680 1681 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1682 int nr, u64 val) 1683 { 1684 unsigned long ptr; 1685 ptr = offsetof(struct btrfs_node, ptrs) + 1686 sizeof(struct btrfs_key_ptr) * nr; 1687 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1688 } 1689 1690 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1691 { 1692 unsigned long ptr; 1693 ptr = offsetof(struct btrfs_node, ptrs) + 1694 sizeof(struct btrfs_key_ptr) * nr; 1695 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1696 } 1697 1698 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1699 int nr, u64 val) 1700 { 1701 unsigned long ptr; 1702 ptr = offsetof(struct btrfs_node, ptrs) + 1703 sizeof(struct btrfs_key_ptr) * nr; 1704 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1705 } 1706 1707 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1708 { 1709 return offsetof(struct btrfs_node, ptrs) + 1710 sizeof(struct btrfs_key_ptr) * nr; 1711 } 1712 1713 void btrfs_node_key(const struct extent_buffer *eb, 1714 struct btrfs_disk_key *disk_key, int nr); 1715 1716 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1717 struct btrfs_disk_key *disk_key, int nr) 1718 { 1719 unsigned long ptr; 1720 ptr = btrfs_node_key_ptr_offset(nr); 1721 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1722 struct btrfs_key_ptr, key, disk_key); 1723 } 1724 1725 /* struct btrfs_item */ 1726 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1727 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1728 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1729 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1730 1731 static inline unsigned long btrfs_item_nr_offset(int nr) 1732 { 1733 return offsetof(struct btrfs_leaf, items) + 1734 sizeof(struct btrfs_item) * nr; 1735 } 1736 1737 static inline struct btrfs_item *btrfs_item_nr(int nr) 1738 { 1739 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1740 } 1741 1742 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1743 struct btrfs_item *item) 1744 { 1745 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1746 } 1747 1748 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1749 { 1750 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1751 } 1752 1753 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1754 { 1755 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1756 } 1757 1758 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1759 { 1760 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1761 } 1762 1763 static inline void btrfs_item_key(const struct extent_buffer *eb, 1764 struct btrfs_disk_key *disk_key, int nr) 1765 { 1766 struct btrfs_item *item = btrfs_item_nr(nr); 1767 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1768 } 1769 1770 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1771 struct btrfs_disk_key *disk_key, int nr) 1772 { 1773 struct btrfs_item *item = btrfs_item_nr(nr); 1774 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1775 } 1776 1777 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1778 1779 /* 1780 * struct btrfs_root_ref 1781 */ 1782 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1783 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1784 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1785 1786 /* struct btrfs_dir_item */ 1787 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1788 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1789 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1790 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1791 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1792 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1793 data_len, 16); 1794 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1795 name_len, 16); 1796 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1797 transid, 64); 1798 1799 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1800 const struct btrfs_dir_item *item, 1801 struct btrfs_disk_key *key) 1802 { 1803 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1804 } 1805 1806 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1807 struct btrfs_dir_item *item, 1808 const struct btrfs_disk_key *key) 1809 { 1810 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1811 } 1812 1813 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1814 num_entries, 64); 1815 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1816 num_bitmaps, 64); 1817 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1818 generation, 64); 1819 1820 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1821 const struct btrfs_free_space_header *h, 1822 struct btrfs_disk_key *key) 1823 { 1824 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1825 } 1826 1827 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1828 struct btrfs_free_space_header *h, 1829 const struct btrfs_disk_key *key) 1830 { 1831 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1832 } 1833 1834 /* struct btrfs_disk_key */ 1835 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1836 objectid, 64); 1837 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1838 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1839 1840 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1841 const struct btrfs_disk_key *disk) 1842 { 1843 cpu->offset = le64_to_cpu(disk->offset); 1844 cpu->type = disk->type; 1845 cpu->objectid = le64_to_cpu(disk->objectid); 1846 } 1847 1848 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1849 const struct btrfs_key *cpu) 1850 { 1851 disk->offset = cpu_to_le64(cpu->offset); 1852 disk->type = cpu->type; 1853 disk->objectid = cpu_to_le64(cpu->objectid); 1854 } 1855 1856 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1857 struct btrfs_key *key, int nr) 1858 { 1859 struct btrfs_disk_key disk_key; 1860 btrfs_node_key(eb, &disk_key, nr); 1861 btrfs_disk_key_to_cpu(key, &disk_key); 1862 } 1863 1864 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1865 struct btrfs_key *key, int nr) 1866 { 1867 struct btrfs_disk_key disk_key; 1868 btrfs_item_key(eb, &disk_key, nr); 1869 btrfs_disk_key_to_cpu(key, &disk_key); 1870 } 1871 1872 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1873 const struct btrfs_dir_item *item, 1874 struct btrfs_key *key) 1875 { 1876 struct btrfs_disk_key disk_key; 1877 btrfs_dir_item_key(eb, item, &disk_key); 1878 btrfs_disk_key_to_cpu(key, &disk_key); 1879 } 1880 1881 /* struct btrfs_header */ 1882 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1883 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1884 generation, 64); 1885 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1886 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1887 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1888 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1889 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 1890 generation, 64); 1891 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 1892 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 1893 nritems, 32); 1894 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 1895 1896 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 1897 { 1898 return (btrfs_header_flags(eb) & flag) == flag; 1899 } 1900 1901 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1902 { 1903 u64 flags = btrfs_header_flags(eb); 1904 btrfs_set_header_flags(eb, flags | flag); 1905 } 1906 1907 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1908 { 1909 u64 flags = btrfs_header_flags(eb); 1910 btrfs_set_header_flags(eb, flags & ~flag); 1911 } 1912 1913 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 1914 { 1915 u64 flags = btrfs_header_flags(eb); 1916 return flags >> BTRFS_BACKREF_REV_SHIFT; 1917 } 1918 1919 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1920 int rev) 1921 { 1922 u64 flags = btrfs_header_flags(eb); 1923 flags &= ~BTRFS_BACKREF_REV_MASK; 1924 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1925 btrfs_set_header_flags(eb, flags); 1926 } 1927 1928 static inline unsigned long btrfs_header_fsid(void) 1929 { 1930 return offsetof(struct btrfs_header, fsid); 1931 } 1932 1933 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 1934 { 1935 return offsetof(struct btrfs_header, chunk_tree_uuid); 1936 } 1937 1938 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 1939 { 1940 return btrfs_header_level(eb) == 0; 1941 } 1942 1943 /* struct btrfs_root_item */ 1944 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1945 generation, 64); 1946 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1947 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1948 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1949 1950 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1951 generation, 64); 1952 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1953 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 1954 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 1955 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 1956 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 1957 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 1958 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 1959 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 1960 last_snapshot, 64); 1961 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 1962 generation_v2, 64); 1963 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 1964 ctransid, 64); 1965 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 1966 otransid, 64); 1967 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 1968 stransid, 64); 1969 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 1970 rtransid, 64); 1971 1972 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 1973 { 1974 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 1975 } 1976 1977 static inline bool btrfs_root_dead(const struct btrfs_root *root) 1978 { 1979 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 1980 } 1981 1982 /* struct btrfs_root_backup */ 1983 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 1984 tree_root, 64); 1985 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 1986 tree_root_gen, 64); 1987 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 1988 tree_root_level, 8); 1989 1990 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 1991 chunk_root, 64); 1992 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 1993 chunk_root_gen, 64); 1994 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 1995 chunk_root_level, 8); 1996 1997 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 1998 extent_root, 64); 1999 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2000 extent_root_gen, 64); 2001 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2002 extent_root_level, 8); 2003 2004 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2005 fs_root, 64); 2006 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2007 fs_root_gen, 64); 2008 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2009 fs_root_level, 8); 2010 2011 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2012 dev_root, 64); 2013 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2014 dev_root_gen, 64); 2015 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2016 dev_root_level, 8); 2017 2018 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2019 csum_root, 64); 2020 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2021 csum_root_gen, 64); 2022 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2023 csum_root_level, 8); 2024 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2025 total_bytes, 64); 2026 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2027 bytes_used, 64); 2028 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2029 num_devices, 64); 2030 2031 /* struct btrfs_balance_item */ 2032 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2033 2034 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2035 const struct btrfs_balance_item *bi, 2036 struct btrfs_disk_balance_args *ba) 2037 { 2038 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2039 } 2040 2041 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2042 struct btrfs_balance_item *bi, 2043 const struct btrfs_disk_balance_args *ba) 2044 { 2045 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2046 } 2047 2048 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2049 const struct btrfs_balance_item *bi, 2050 struct btrfs_disk_balance_args *ba) 2051 { 2052 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2053 } 2054 2055 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2056 struct btrfs_balance_item *bi, 2057 const struct btrfs_disk_balance_args *ba) 2058 { 2059 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2060 } 2061 2062 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2063 const struct btrfs_balance_item *bi, 2064 struct btrfs_disk_balance_args *ba) 2065 { 2066 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2067 } 2068 2069 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2070 struct btrfs_balance_item *bi, 2071 const struct btrfs_disk_balance_args *ba) 2072 { 2073 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2074 } 2075 2076 static inline void 2077 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2078 const struct btrfs_disk_balance_args *disk) 2079 { 2080 memset(cpu, 0, sizeof(*cpu)); 2081 2082 cpu->profiles = le64_to_cpu(disk->profiles); 2083 cpu->usage = le64_to_cpu(disk->usage); 2084 cpu->devid = le64_to_cpu(disk->devid); 2085 cpu->pstart = le64_to_cpu(disk->pstart); 2086 cpu->pend = le64_to_cpu(disk->pend); 2087 cpu->vstart = le64_to_cpu(disk->vstart); 2088 cpu->vend = le64_to_cpu(disk->vend); 2089 cpu->target = le64_to_cpu(disk->target); 2090 cpu->flags = le64_to_cpu(disk->flags); 2091 cpu->limit = le64_to_cpu(disk->limit); 2092 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2093 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2094 } 2095 2096 static inline void 2097 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2098 const struct btrfs_balance_args *cpu) 2099 { 2100 memset(disk, 0, sizeof(*disk)); 2101 2102 disk->profiles = cpu_to_le64(cpu->profiles); 2103 disk->usage = cpu_to_le64(cpu->usage); 2104 disk->devid = cpu_to_le64(cpu->devid); 2105 disk->pstart = cpu_to_le64(cpu->pstart); 2106 disk->pend = cpu_to_le64(cpu->pend); 2107 disk->vstart = cpu_to_le64(cpu->vstart); 2108 disk->vend = cpu_to_le64(cpu->vend); 2109 disk->target = cpu_to_le64(cpu->target); 2110 disk->flags = cpu_to_le64(cpu->flags); 2111 disk->limit = cpu_to_le64(cpu->limit); 2112 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2113 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2114 } 2115 2116 /* struct btrfs_super_block */ 2117 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2118 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2119 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2120 generation, 64); 2121 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2122 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2123 struct btrfs_super_block, sys_chunk_array_size, 32); 2124 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2125 struct btrfs_super_block, chunk_root_generation, 64); 2126 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2127 root_level, 8); 2128 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2129 chunk_root, 64); 2130 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2131 chunk_root_level, 8); 2132 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2133 log_root, 64); 2134 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2135 log_root_transid, 64); 2136 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2137 log_root_level, 8); 2138 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2139 total_bytes, 64); 2140 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2141 bytes_used, 64); 2142 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2143 sectorsize, 32); 2144 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2145 nodesize, 32); 2146 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2147 stripesize, 32); 2148 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2149 root_dir_objectid, 64); 2150 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2151 num_devices, 64); 2152 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2153 compat_flags, 64); 2154 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2155 compat_ro_flags, 64); 2156 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2157 incompat_flags, 64); 2158 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2159 csum_type, 16); 2160 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2161 cache_generation, 64); 2162 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2163 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2164 uuid_tree_generation, 64); 2165 2166 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2167 const char *btrfs_super_csum_name(u16 csum_type); 2168 2169 /* 2170 * The leaf data grows from end-to-front in the node. 2171 * this returns the address of the start of the last item, 2172 * which is the stop of the leaf data stack 2173 */ 2174 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2175 { 2176 u32 nr = btrfs_header_nritems(leaf); 2177 2178 if (nr == 0) 2179 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2180 return btrfs_item_offset_nr(leaf, nr - 1); 2181 } 2182 2183 /* struct btrfs_file_extent_item */ 2184 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2185 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2186 struct btrfs_file_extent_item, disk_bytenr, 64); 2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2188 struct btrfs_file_extent_item, offset, 64); 2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2190 struct btrfs_file_extent_item, generation, 64); 2191 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2192 struct btrfs_file_extent_item, num_bytes, 64); 2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2194 struct btrfs_file_extent_item, disk_num_bytes, 64); 2195 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2196 struct btrfs_file_extent_item, compression, 8); 2197 2198 static inline unsigned long 2199 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2200 { 2201 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2202 } 2203 2204 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2205 { 2206 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2207 } 2208 2209 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2210 disk_bytenr, 64); 2211 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2212 generation, 64); 2213 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2214 disk_num_bytes, 64); 2215 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2216 offset, 64); 2217 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2218 num_bytes, 64); 2219 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2220 ram_bytes, 64); 2221 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2222 compression, 8); 2223 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2224 encryption, 8); 2225 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2226 other_encoding, 16); 2227 2228 /* 2229 * this returns the number of bytes used by the item on disk, minus the 2230 * size of any extent headers. If a file is compressed on disk, this is 2231 * the compressed size 2232 */ 2233 static inline u32 btrfs_file_extent_inline_item_len( 2234 const struct extent_buffer *eb, 2235 struct btrfs_item *e) 2236 { 2237 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2238 } 2239 2240 /* btrfs_qgroup_status_item */ 2241 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2242 generation, 64); 2243 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2244 version, 64); 2245 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2246 flags, 64); 2247 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2248 rescan, 64); 2249 2250 /* btrfs_qgroup_info_item */ 2251 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2252 generation, 64); 2253 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2254 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2255 rfer_cmpr, 64); 2256 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2257 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2258 excl_cmpr, 64); 2259 2260 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2261 struct btrfs_qgroup_info_item, generation, 64); 2262 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2263 rfer, 64); 2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2265 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2267 excl, 64); 2268 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2269 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2270 2271 /* btrfs_qgroup_limit_item */ 2272 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2273 flags, 64); 2274 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2275 max_rfer, 64); 2276 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2277 max_excl, 64); 2278 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2279 rsv_rfer, 64); 2280 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2281 rsv_excl, 64); 2282 2283 /* btrfs_dev_replace_item */ 2284 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2285 struct btrfs_dev_replace_item, src_devid, 64); 2286 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2287 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2288 64); 2289 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2290 replace_state, 64); 2291 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2292 time_started, 64); 2293 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2294 time_stopped, 64); 2295 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2296 num_write_errors, 64); 2297 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2298 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2299 64); 2300 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2301 cursor_left, 64); 2302 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2303 cursor_right, 64); 2304 2305 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2306 struct btrfs_dev_replace_item, src_devid, 64); 2307 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2308 struct btrfs_dev_replace_item, 2309 cont_reading_from_srcdev_mode, 64); 2310 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2311 struct btrfs_dev_replace_item, replace_state, 64); 2312 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2313 struct btrfs_dev_replace_item, time_started, 64); 2314 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2315 struct btrfs_dev_replace_item, time_stopped, 64); 2316 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2317 struct btrfs_dev_replace_item, num_write_errors, 64); 2318 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2319 struct btrfs_dev_replace_item, 2320 num_uncorrectable_read_errors, 64); 2321 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2322 struct btrfs_dev_replace_item, cursor_left, 64); 2323 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2324 struct btrfs_dev_replace_item, cursor_right, 64); 2325 2326 /* helper function to cast into the data area of the leaf. */ 2327 #define btrfs_item_ptr(leaf, slot, type) \ 2328 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2329 btrfs_item_offset_nr(leaf, slot))) 2330 2331 #define btrfs_item_ptr_offset(leaf, slot) \ 2332 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2333 btrfs_item_offset_nr(leaf, slot))) 2334 2335 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2336 { 2337 return crc32c(crc, address, length); 2338 } 2339 2340 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2341 { 2342 put_unaligned_le32(~crc, result); 2343 } 2344 2345 static inline u64 btrfs_name_hash(const char *name, int len) 2346 { 2347 return crc32c((u32)~1, name, len); 2348 } 2349 2350 /* 2351 * Figure the key offset of an extended inode ref 2352 */ 2353 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2354 int len) 2355 { 2356 return (u64) crc32c(parent_objectid, name, len); 2357 } 2358 2359 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2360 { 2361 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2362 } 2363 2364 /* extent-tree.c */ 2365 2366 enum btrfs_inline_ref_type { 2367 BTRFS_REF_TYPE_INVALID, 2368 BTRFS_REF_TYPE_BLOCK, 2369 BTRFS_REF_TYPE_DATA, 2370 BTRFS_REF_TYPE_ANY, 2371 }; 2372 2373 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2374 struct btrfs_extent_inline_ref *iref, 2375 enum btrfs_inline_ref_type is_data); 2376 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2377 2378 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2379 2380 /* 2381 * Use this if we would be adding new items, as we could split nodes as we cow 2382 * down the tree. 2383 */ 2384 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2385 unsigned num_items) 2386 { 2387 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2388 } 2389 2390 /* 2391 * Doing a truncate or a modification won't result in new nodes or leaves, just 2392 * what we need for COW. 2393 */ 2394 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2395 unsigned num_items) 2396 { 2397 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2398 } 2399 2400 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2401 u64 start, u64 num_bytes); 2402 void btrfs_free_excluded_extents(struct btrfs_block_group_cache *cache); 2403 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2404 unsigned long count); 2405 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2406 struct btrfs_delayed_ref_root *delayed_refs, 2407 struct btrfs_delayed_ref_head *head); 2408 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2409 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2410 struct btrfs_fs_info *fs_info, u64 bytenr, 2411 u64 offset, int metadata, u64 *refs, u64 *flags); 2412 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2413 u64 bytenr, u64 num, int reserved); 2414 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2415 u64 bytenr, u64 num_bytes); 2416 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2417 int btrfs_cross_ref_exist(struct btrfs_root *root, 2418 u64 objectid, u64 offset, u64 bytenr); 2419 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2420 struct btrfs_root *root, 2421 u64 parent, u64 root_objectid, 2422 const struct btrfs_disk_key *key, 2423 int level, u64 hint, 2424 u64 empty_size); 2425 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2426 struct btrfs_root *root, 2427 struct extent_buffer *buf, 2428 u64 parent, int last_ref); 2429 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2430 struct btrfs_root *root, u64 owner, 2431 u64 offset, u64 ram_bytes, 2432 struct btrfs_key *ins); 2433 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2434 u64 root_objectid, u64 owner, u64 offset, 2435 struct btrfs_key *ins); 2436 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2437 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2438 struct btrfs_key *ins, int is_data, int delalloc); 2439 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2440 struct extent_buffer *buf, int full_backref); 2441 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2442 struct extent_buffer *buf, int full_backref); 2443 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2444 u64 bytenr, u64 num_bytes, u64 flags, 2445 int level, int is_data); 2446 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2447 2448 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2449 u64 start, u64 len, int delalloc); 2450 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2451 u64 start, u64 len); 2452 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2453 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2454 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2455 struct btrfs_ref *generic_ref); 2456 2457 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2458 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2459 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2460 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2461 2462 enum btrfs_reserve_flush_enum { 2463 /* If we are in the transaction, we can't flush anything.*/ 2464 BTRFS_RESERVE_NO_FLUSH, 2465 /* 2466 * Flushing delalloc may cause deadlock somewhere, in this 2467 * case, use FLUSH LIMIT 2468 */ 2469 BTRFS_RESERVE_FLUSH_LIMIT, 2470 BTRFS_RESERVE_FLUSH_EVICT, 2471 BTRFS_RESERVE_FLUSH_ALL, 2472 }; 2473 2474 enum btrfs_flush_state { 2475 FLUSH_DELAYED_ITEMS_NR = 1, 2476 FLUSH_DELAYED_ITEMS = 2, 2477 FLUSH_DELAYED_REFS_NR = 3, 2478 FLUSH_DELAYED_REFS = 4, 2479 FLUSH_DELALLOC = 5, 2480 FLUSH_DELALLOC_WAIT = 6, 2481 ALLOC_CHUNK = 7, 2482 ALLOC_CHUNK_FORCE = 8, 2483 RUN_DELAYED_IPUTS = 9, 2484 COMMIT_TRANS = 10, 2485 }; 2486 2487 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2488 struct btrfs_block_rsv *rsv, 2489 int nitems, bool use_global_rsv); 2490 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2491 struct btrfs_block_rsv *rsv); 2492 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2493 bool qgroup_free); 2494 2495 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2496 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2497 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2498 u64 start, u64 end); 2499 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2500 u64 num_bytes, u64 *actual_bytes); 2501 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2502 2503 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2504 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2505 struct btrfs_fs_info *fs_info); 2506 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2507 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2508 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2509 2510 /* ctree.c */ 2511 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2512 int level, int *slot); 2513 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2514 int btrfs_previous_item(struct btrfs_root *root, 2515 struct btrfs_path *path, u64 min_objectid, 2516 int type); 2517 int btrfs_previous_extent_item(struct btrfs_root *root, 2518 struct btrfs_path *path, u64 min_objectid); 2519 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2520 struct btrfs_path *path, 2521 const struct btrfs_key *new_key); 2522 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2523 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2524 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2525 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2526 struct btrfs_key *key, int lowest_level, 2527 u64 min_trans); 2528 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2529 struct btrfs_path *path, 2530 u64 min_trans); 2531 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2532 int slot); 2533 2534 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2535 struct btrfs_root *root, struct extent_buffer *buf, 2536 struct extent_buffer *parent, int parent_slot, 2537 struct extent_buffer **cow_ret); 2538 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2539 struct btrfs_root *root, 2540 struct extent_buffer *buf, 2541 struct extent_buffer **cow_ret, u64 new_root_objectid); 2542 int btrfs_block_can_be_shared(struct btrfs_root *root, 2543 struct extent_buffer *buf); 2544 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2545 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2546 int btrfs_split_item(struct btrfs_trans_handle *trans, 2547 struct btrfs_root *root, 2548 struct btrfs_path *path, 2549 const struct btrfs_key *new_key, 2550 unsigned long split_offset); 2551 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2552 struct btrfs_root *root, 2553 struct btrfs_path *path, 2554 const struct btrfs_key *new_key); 2555 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2556 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2557 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2558 const struct btrfs_key *key, struct btrfs_path *p, 2559 int ins_len, int cow); 2560 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2561 struct btrfs_path *p, u64 time_seq); 2562 int btrfs_search_slot_for_read(struct btrfs_root *root, 2563 const struct btrfs_key *key, 2564 struct btrfs_path *p, int find_higher, 2565 int return_any); 2566 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2567 struct btrfs_root *root, struct extent_buffer *parent, 2568 int start_slot, u64 *last_ret, 2569 struct btrfs_key *progress); 2570 void btrfs_release_path(struct btrfs_path *p); 2571 struct btrfs_path *btrfs_alloc_path(void); 2572 void btrfs_free_path(struct btrfs_path *p); 2573 void btrfs_set_path_blocking(struct btrfs_path *p); 2574 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2575 2576 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2577 struct btrfs_path *path, int slot, int nr); 2578 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2579 struct btrfs_root *root, 2580 struct btrfs_path *path) 2581 { 2582 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2583 } 2584 2585 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2586 const struct btrfs_key *cpu_key, u32 *data_size, 2587 u32 total_data, u32 total_size, int nr); 2588 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2589 const struct btrfs_key *key, void *data, u32 data_size); 2590 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2591 struct btrfs_root *root, 2592 struct btrfs_path *path, 2593 const struct btrfs_key *cpu_key, u32 *data_size, 2594 int nr); 2595 2596 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2597 struct btrfs_root *root, 2598 struct btrfs_path *path, 2599 const struct btrfs_key *key, 2600 u32 data_size) 2601 { 2602 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2603 } 2604 2605 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2606 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2607 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2608 u64 time_seq); 2609 static inline int btrfs_next_old_item(struct btrfs_root *root, 2610 struct btrfs_path *p, u64 time_seq) 2611 { 2612 ++p->slots[0]; 2613 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2614 return btrfs_next_old_leaf(root, p, time_seq); 2615 return 0; 2616 } 2617 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2618 { 2619 return btrfs_next_old_item(root, p, 0); 2620 } 2621 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2622 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2623 struct btrfs_block_rsv *block_rsv, 2624 int update_ref, int for_reloc); 2625 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2626 struct btrfs_root *root, 2627 struct extent_buffer *node, 2628 struct extent_buffer *parent); 2629 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2630 { 2631 /* 2632 * Do it this way so we only ever do one test_bit in the normal case. 2633 */ 2634 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2635 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2636 return 2; 2637 return 1; 2638 } 2639 return 0; 2640 } 2641 2642 /* 2643 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2644 * anything except sleeping. This function is used to check the status of 2645 * the fs. 2646 */ 2647 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2648 { 2649 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2650 } 2651 2652 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2653 { 2654 kfree(fs_info->balance_ctl); 2655 kfree(fs_info->delayed_root); 2656 kfree(fs_info->extent_root); 2657 kfree(fs_info->tree_root); 2658 kfree(fs_info->chunk_root); 2659 kfree(fs_info->dev_root); 2660 kfree(fs_info->csum_root); 2661 kfree(fs_info->quota_root); 2662 kfree(fs_info->uuid_root); 2663 kfree(fs_info->free_space_root); 2664 kfree(fs_info->super_copy); 2665 kfree(fs_info->super_for_commit); 2666 kvfree(fs_info); 2667 } 2668 2669 /* tree mod log functions from ctree.c */ 2670 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2671 struct seq_list *elem); 2672 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2673 struct seq_list *elem); 2674 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2675 2676 /* root-item.c */ 2677 int btrfs_add_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_ref(struct btrfs_trans_handle *trans, u64 root_id, 2681 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2682 int name_len); 2683 int btrfs_del_root(struct btrfs_trans_handle *trans, 2684 const struct btrfs_key *key); 2685 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2686 const struct btrfs_key *key, 2687 struct btrfs_root_item *item); 2688 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2689 struct btrfs_root *root, 2690 struct btrfs_key *key, 2691 struct btrfs_root_item *item); 2692 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2693 struct btrfs_path *path, struct btrfs_root_item *root_item, 2694 struct btrfs_key *root_key); 2695 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2696 void btrfs_set_root_node(struct btrfs_root_item *item, 2697 struct extent_buffer *node); 2698 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2699 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2700 struct btrfs_root *root); 2701 2702 /* uuid-tree.c */ 2703 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2704 u64 subid); 2705 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2706 u64 subid); 2707 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2708 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2709 u64)); 2710 2711 /* dir-item.c */ 2712 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2713 const char *name, int name_len); 2714 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2715 int name_len, struct btrfs_inode *dir, 2716 struct btrfs_key *location, u8 type, u64 index); 2717 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2718 struct btrfs_root *root, 2719 struct btrfs_path *path, u64 dir, 2720 const char *name, int name_len, 2721 int mod); 2722 struct btrfs_dir_item * 2723 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2724 struct btrfs_root *root, 2725 struct btrfs_path *path, u64 dir, 2726 u64 objectid, const char *name, int name_len, 2727 int mod); 2728 struct btrfs_dir_item * 2729 btrfs_search_dir_index_item(struct btrfs_root *root, 2730 struct btrfs_path *path, u64 dirid, 2731 const char *name, int name_len); 2732 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2733 struct btrfs_root *root, 2734 struct btrfs_path *path, 2735 struct btrfs_dir_item *di); 2736 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2737 struct btrfs_root *root, 2738 struct btrfs_path *path, u64 objectid, 2739 const char *name, u16 name_len, 2740 const void *data, u16 data_len); 2741 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2742 struct btrfs_root *root, 2743 struct btrfs_path *path, u64 dir, 2744 const char *name, u16 name_len, 2745 int mod); 2746 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2747 struct btrfs_path *path, 2748 const char *name, 2749 int name_len); 2750 2751 /* orphan.c */ 2752 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2753 struct btrfs_root *root, u64 offset); 2754 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2755 struct btrfs_root *root, u64 offset); 2756 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2757 2758 /* inode-item.c */ 2759 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2760 struct btrfs_root *root, 2761 const char *name, int name_len, 2762 u64 inode_objectid, u64 ref_objectid, u64 index); 2763 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2764 struct btrfs_root *root, 2765 const char *name, int name_len, 2766 u64 inode_objectid, u64 ref_objectid, u64 *index); 2767 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2768 struct btrfs_root *root, 2769 struct btrfs_path *path, u64 objectid); 2770 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2771 *root, struct btrfs_path *path, 2772 struct btrfs_key *location, int mod); 2773 2774 struct btrfs_inode_extref * 2775 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2776 struct btrfs_root *root, 2777 struct btrfs_path *path, 2778 const char *name, int name_len, 2779 u64 inode_objectid, u64 ref_objectid, int ins_len, 2780 int cow); 2781 2782 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2783 int slot, const char *name, 2784 int name_len); 2785 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2786 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2787 const char *name, int name_len); 2788 /* file-item.c */ 2789 struct btrfs_dio_private; 2790 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2791 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 2792 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2793 u8 *dst); 2794 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 2795 u64 logical_offset); 2796 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2797 struct btrfs_root *root, 2798 u64 objectid, u64 pos, 2799 u64 disk_offset, u64 disk_num_bytes, 2800 u64 num_bytes, u64 offset, u64 ram_bytes, 2801 u8 compression, u8 encryption, u16 other_encoding); 2802 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2803 struct btrfs_root *root, 2804 struct btrfs_path *path, u64 objectid, 2805 u64 bytenr, int mod); 2806 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2807 struct btrfs_root *root, 2808 struct btrfs_ordered_sum *sums); 2809 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 2810 u64 file_start, int contig); 2811 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2812 struct list_head *list, int search_commit); 2813 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2814 const struct btrfs_path *path, 2815 struct btrfs_file_extent_item *fi, 2816 const bool new_inline, 2817 struct extent_map *em); 2818 2819 /* inode.c */ 2820 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2821 u64 start, u64 len); 2822 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2823 u64 *orig_start, u64 *orig_block_len, 2824 u64 *ram_bytes); 2825 2826 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2827 struct btrfs_inode *inode); 2828 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2829 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2830 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2831 struct btrfs_root *root, 2832 struct btrfs_inode *dir, struct btrfs_inode *inode, 2833 const char *name, int name_len); 2834 int btrfs_add_link(struct btrfs_trans_handle *trans, 2835 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2836 const char *name, int name_len, int add_backref, u64 index); 2837 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2838 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2839 int front); 2840 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2841 struct btrfs_root *root, 2842 struct inode *inode, u64 new_size, 2843 u32 min_type); 2844 2845 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 2846 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 2847 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2848 unsigned int extra_bits, 2849 struct extent_state **cached_state); 2850 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2851 struct btrfs_root *new_root, 2852 struct btrfs_root *parent_root, 2853 u64 new_dirid); 2854 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 2855 unsigned *bits); 2856 void btrfs_clear_delalloc_extent(struct inode *inode, 2857 struct extent_state *state, unsigned *bits); 2858 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 2859 struct extent_state *other); 2860 void btrfs_split_delalloc_extent(struct inode *inode, 2861 struct extent_state *orig, u64 split); 2862 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 2863 unsigned long bio_flags); 2864 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 2865 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 2866 int btrfs_readpage(struct file *file, struct page *page); 2867 void btrfs_evict_inode(struct inode *inode); 2868 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2869 struct inode *btrfs_alloc_inode(struct super_block *sb); 2870 void btrfs_destroy_inode(struct inode *inode); 2871 void btrfs_free_inode(struct inode *inode); 2872 int btrfs_drop_inode(struct inode *inode); 2873 int __init btrfs_init_cachep(void); 2874 void __cold btrfs_destroy_cachep(void); 2875 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 2876 struct btrfs_root *root, int *new, 2877 struct btrfs_path *path); 2878 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2879 struct btrfs_root *root, int *was_new); 2880 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 2881 struct page *page, size_t pg_offset, 2882 u64 start, u64 end, int create); 2883 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2884 struct btrfs_root *root, 2885 struct inode *inode); 2886 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 2887 struct btrfs_root *root, struct inode *inode); 2888 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 2889 struct btrfs_inode *inode); 2890 int btrfs_orphan_cleanup(struct btrfs_root *root); 2891 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 2892 void btrfs_add_delayed_iput(struct inode *inode); 2893 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 2894 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 2895 int btrfs_prealloc_file_range(struct inode *inode, int mode, 2896 u64 start, u64 num_bytes, u64 min_size, 2897 loff_t actual_len, u64 *alloc_hint); 2898 int btrfs_prealloc_file_range_trans(struct inode *inode, 2899 struct btrfs_trans_handle *trans, int mode, 2900 u64 start, u64 num_bytes, u64 min_size, 2901 loff_t actual_len, u64 *alloc_hint); 2902 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 2903 u64 start, u64 end, int *page_started, unsigned long *nr_written, 2904 struct writeback_control *wbc); 2905 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 2906 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 2907 u64 end, int uptodate); 2908 extern const struct dentry_operations btrfs_dentry_operations; 2909 2910 /* ioctl.c */ 2911 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2912 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2913 int btrfs_ioctl_get_supported_features(void __user *arg); 2914 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 2915 int btrfs_is_empty_uuid(u8 *uuid); 2916 int btrfs_defrag_file(struct inode *inode, struct file *file, 2917 struct btrfs_ioctl_defrag_range_args *range, 2918 u64 newer_than, unsigned long max_pages); 2919 void btrfs_get_block_group_info(struct list_head *groups_list, 2920 struct btrfs_ioctl_space_info *space); 2921 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 2922 struct btrfs_ioctl_balance_args *bargs); 2923 2924 /* file.c */ 2925 int __init btrfs_auto_defrag_init(void); 2926 void __cold btrfs_auto_defrag_exit(void); 2927 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 2928 struct btrfs_inode *inode); 2929 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 2930 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 2931 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 2932 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 2933 int skip_pinned); 2934 extern const struct file_operations btrfs_file_operations; 2935 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 2936 struct btrfs_root *root, struct inode *inode, 2937 struct btrfs_path *path, u64 start, u64 end, 2938 u64 *drop_end, int drop_cache, 2939 int replace_extent, 2940 u32 extent_item_size, 2941 int *key_inserted); 2942 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 2943 struct btrfs_root *root, struct inode *inode, u64 start, 2944 u64 end, int drop_cache); 2945 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, 2946 const u64 start, const u64 end, 2947 struct btrfs_clone_extent_info *clone_info, 2948 struct btrfs_trans_handle **trans_out); 2949 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2950 struct btrfs_inode *inode, u64 start, u64 end); 2951 int btrfs_release_file(struct inode *inode, struct file *file); 2952 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 2953 size_t num_pages, loff_t pos, size_t write_bytes, 2954 struct extent_state **cached); 2955 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 2956 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 2957 struct file *file_out, loff_t pos_out, 2958 loff_t len, unsigned int remap_flags); 2959 2960 /* tree-defrag.c */ 2961 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2962 struct btrfs_root *root); 2963 2964 /* super.c */ 2965 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 2966 unsigned long new_flags); 2967 int btrfs_sync_fs(struct super_block *sb, int wait); 2968 2969 static inline __printf(2, 3) __cold 2970 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 2971 { 2972 } 2973 2974 #ifdef CONFIG_PRINTK 2975 __printf(2, 3) 2976 __cold 2977 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 2978 #else 2979 #define btrfs_printk(fs_info, fmt, args...) \ 2980 btrfs_no_printk(fs_info, fmt, ##args) 2981 #endif 2982 2983 #define btrfs_emerg(fs_info, fmt, args...) \ 2984 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 2985 #define btrfs_alert(fs_info, fmt, args...) \ 2986 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 2987 #define btrfs_crit(fs_info, fmt, args...) \ 2988 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 2989 #define btrfs_err(fs_info, fmt, args...) \ 2990 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 2991 #define btrfs_warn(fs_info, fmt, args...) \ 2992 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 2993 #define btrfs_notice(fs_info, fmt, args...) \ 2994 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 2995 #define btrfs_info(fs_info, fmt, args...) \ 2996 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 2997 2998 /* 2999 * Wrappers that use printk_in_rcu 3000 */ 3001 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3002 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3003 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3004 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3005 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3006 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3007 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3008 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3009 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3010 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3011 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3012 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3013 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3014 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3015 3016 /* 3017 * Wrappers that use a ratelimited printk_in_rcu 3018 */ 3019 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3020 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3021 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3022 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3023 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3024 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3025 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3026 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3027 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3028 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3029 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3030 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3031 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3032 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3033 3034 /* 3035 * Wrappers that use a ratelimited printk 3036 */ 3037 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3038 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3039 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3040 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3041 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3042 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3043 #define btrfs_err_rl(fs_info, fmt, args...) \ 3044 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3045 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3046 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3047 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3048 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3049 #define btrfs_info_rl(fs_info, fmt, args...) \ 3050 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3051 3052 #if defined(CONFIG_DYNAMIC_DEBUG) 3053 #define btrfs_debug(fs_info, fmt, args...) \ 3054 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3055 fs_info, KERN_DEBUG fmt, ##args) 3056 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3057 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3058 fs_info, KERN_DEBUG fmt, ##args) 3059 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3060 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3061 fs_info, KERN_DEBUG fmt, ##args) 3062 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3063 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3064 fs_info, KERN_DEBUG fmt, ##args) 3065 #elif defined(DEBUG) 3066 #define btrfs_debug(fs_info, fmt, args...) \ 3067 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3068 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3069 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3070 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3071 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3072 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3073 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3074 #else 3075 #define btrfs_debug(fs_info, fmt, args...) \ 3076 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3077 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3078 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3079 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3080 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3081 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3082 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3083 #endif 3084 3085 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3086 do { \ 3087 rcu_read_lock(); \ 3088 btrfs_printk(fs_info, fmt, ##args); \ 3089 rcu_read_unlock(); \ 3090 } while (0) 3091 3092 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3093 do { \ 3094 rcu_read_lock(); \ 3095 btrfs_no_printk(fs_info, fmt, ##args); \ 3096 rcu_read_unlock(); \ 3097 } while (0) 3098 3099 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3100 do { \ 3101 static DEFINE_RATELIMIT_STATE(_rs, \ 3102 DEFAULT_RATELIMIT_INTERVAL, \ 3103 DEFAULT_RATELIMIT_BURST); \ 3104 if (__ratelimit(&_rs)) \ 3105 btrfs_printk(fs_info, fmt, ##args); \ 3106 } while (0) 3107 3108 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3109 do { \ 3110 rcu_read_lock(); \ 3111 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3112 rcu_read_unlock(); \ 3113 } while (0) 3114 3115 __cold 3116 static inline void assfail(const char *expr, const char *file, int line) 3117 { 3118 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { 3119 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3120 BUG(); 3121 } 3122 } 3123 3124 #define ASSERT(expr) \ 3125 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3126 3127 /* 3128 * Use that for functions that are conditionally exported for sanity tests but 3129 * otherwise static 3130 */ 3131 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3132 #define EXPORT_FOR_TESTS static 3133 #else 3134 #define EXPORT_FOR_TESTS 3135 #endif 3136 3137 __cold 3138 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3139 { 3140 btrfs_err(fs_info, 3141 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3142 } 3143 3144 __printf(5, 6) 3145 __cold 3146 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3147 unsigned int line, int errno, const char *fmt, ...); 3148 3149 const char *btrfs_decode_error(int errno); 3150 3151 __cold 3152 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3153 const char *function, 3154 unsigned int line, int errno); 3155 3156 /* 3157 * Call btrfs_abort_transaction as early as possible when an error condition is 3158 * detected, that way the exact line number is reported. 3159 */ 3160 #define btrfs_abort_transaction(trans, errno) \ 3161 do { \ 3162 /* Report first abort since mount */ \ 3163 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3164 &((trans)->fs_info->fs_state))) { \ 3165 if ((errno) != -EIO) { \ 3166 WARN(1, KERN_DEBUG \ 3167 "BTRFS: Transaction aborted (error %d)\n", \ 3168 (errno)); \ 3169 } else { \ 3170 btrfs_debug((trans)->fs_info, \ 3171 "Transaction aborted (error %d)", \ 3172 (errno)); \ 3173 } \ 3174 } \ 3175 __btrfs_abort_transaction((trans), __func__, \ 3176 __LINE__, (errno)); \ 3177 } while (0) 3178 3179 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3180 do { \ 3181 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3182 (errno), fmt, ##args); \ 3183 } while (0) 3184 3185 __printf(5, 6) 3186 __cold 3187 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3188 unsigned int line, int errno, const char *fmt, ...); 3189 /* 3190 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3191 * will panic(). Otherwise we BUG() here. 3192 */ 3193 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3194 do { \ 3195 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3196 BUG(); \ 3197 } while (0) 3198 3199 3200 /* compatibility and incompatibility defines */ 3201 3202 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3203 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3204 #opt) 3205 3206 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3207 u64 flag, const char* name) 3208 { 3209 struct btrfs_super_block *disk_super; 3210 u64 features; 3211 3212 disk_super = fs_info->super_copy; 3213 features = btrfs_super_incompat_flags(disk_super); 3214 if (!(features & flag)) { 3215 spin_lock(&fs_info->super_lock); 3216 features = btrfs_super_incompat_flags(disk_super); 3217 if (!(features & flag)) { 3218 features |= flag; 3219 btrfs_set_super_incompat_flags(disk_super, features); 3220 btrfs_info(fs_info, 3221 "setting incompat feature flag for %s (0x%llx)", 3222 name, flag); 3223 } 3224 spin_unlock(&fs_info->super_lock); 3225 } 3226 } 3227 3228 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3229 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3230 #opt) 3231 3232 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3233 u64 flag, const char* name) 3234 { 3235 struct btrfs_super_block *disk_super; 3236 u64 features; 3237 3238 disk_super = fs_info->super_copy; 3239 features = btrfs_super_incompat_flags(disk_super); 3240 if (features & flag) { 3241 spin_lock(&fs_info->super_lock); 3242 features = btrfs_super_incompat_flags(disk_super); 3243 if (features & flag) { 3244 features &= ~flag; 3245 btrfs_set_super_incompat_flags(disk_super, features); 3246 btrfs_info(fs_info, 3247 "clearing incompat feature flag for %s (0x%llx)", 3248 name, flag); 3249 } 3250 spin_unlock(&fs_info->super_lock); 3251 } 3252 } 3253 3254 #define btrfs_fs_incompat(fs_info, opt) \ 3255 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3256 3257 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3258 { 3259 struct btrfs_super_block *disk_super; 3260 disk_super = fs_info->super_copy; 3261 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3262 } 3263 3264 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3265 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3266 #opt) 3267 3268 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3269 u64 flag, const char *name) 3270 { 3271 struct btrfs_super_block *disk_super; 3272 u64 features; 3273 3274 disk_super = fs_info->super_copy; 3275 features = btrfs_super_compat_ro_flags(disk_super); 3276 if (!(features & flag)) { 3277 spin_lock(&fs_info->super_lock); 3278 features = btrfs_super_compat_ro_flags(disk_super); 3279 if (!(features & flag)) { 3280 features |= flag; 3281 btrfs_set_super_compat_ro_flags(disk_super, features); 3282 btrfs_info(fs_info, 3283 "setting compat-ro feature flag for %s (0x%llx)", 3284 name, flag); 3285 } 3286 spin_unlock(&fs_info->super_lock); 3287 } 3288 } 3289 3290 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3291 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3292 #opt) 3293 3294 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3295 u64 flag, const char *name) 3296 { 3297 struct btrfs_super_block *disk_super; 3298 u64 features; 3299 3300 disk_super = fs_info->super_copy; 3301 features = btrfs_super_compat_ro_flags(disk_super); 3302 if (features & flag) { 3303 spin_lock(&fs_info->super_lock); 3304 features = btrfs_super_compat_ro_flags(disk_super); 3305 if (features & flag) { 3306 features &= ~flag; 3307 btrfs_set_super_compat_ro_flags(disk_super, features); 3308 btrfs_info(fs_info, 3309 "clearing compat-ro feature flag for %s (0x%llx)", 3310 name, flag); 3311 } 3312 spin_unlock(&fs_info->super_lock); 3313 } 3314 } 3315 3316 #define btrfs_fs_compat_ro(fs_info, opt) \ 3317 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3318 3319 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3320 { 3321 struct btrfs_super_block *disk_super; 3322 disk_super = fs_info->super_copy; 3323 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3324 } 3325 3326 /* acl.c */ 3327 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3328 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3329 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3330 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3331 struct inode *inode, struct inode *dir); 3332 #else 3333 #define btrfs_get_acl NULL 3334 #define btrfs_set_acl NULL 3335 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3336 struct inode *inode, struct inode *dir) 3337 { 3338 return 0; 3339 } 3340 #endif 3341 3342 /* relocation.c */ 3343 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3344 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3345 struct btrfs_root *root); 3346 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3347 struct btrfs_root *root); 3348 int btrfs_recover_relocation(struct btrfs_root *root); 3349 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3350 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3351 struct btrfs_root *root, struct extent_buffer *buf, 3352 struct extent_buffer *cow); 3353 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3354 u64 *bytes_to_reserve); 3355 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3356 struct btrfs_pending_snapshot *pending); 3357 3358 /* scrub.c */ 3359 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3360 u64 end, struct btrfs_scrub_progress *progress, 3361 int readonly, int is_dev_replace); 3362 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3363 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3364 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3365 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3366 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3367 struct btrfs_scrub_progress *progress); 3368 static inline void btrfs_init_full_stripe_locks_tree( 3369 struct btrfs_full_stripe_locks_tree *locks_root) 3370 { 3371 locks_root->root = RB_ROOT; 3372 mutex_init(&locks_root->lock); 3373 } 3374 3375 /* dev-replace.c */ 3376 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3377 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3378 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3379 3380 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3381 { 3382 btrfs_bio_counter_sub(fs_info, 1); 3383 } 3384 3385 /* reada.c */ 3386 struct reada_control { 3387 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3388 struct btrfs_key key_start; 3389 struct btrfs_key key_end; /* exclusive */ 3390 atomic_t elems; 3391 struct kref refcnt; 3392 wait_queue_head_t wait; 3393 }; 3394 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3395 struct btrfs_key *start, struct btrfs_key *end); 3396 int btrfs_reada_wait(void *handle); 3397 void btrfs_reada_detach(void *handle); 3398 int btree_readahead_hook(struct extent_buffer *eb, int err); 3399 3400 static inline int is_fstree(u64 rootid) 3401 { 3402 if (rootid == BTRFS_FS_TREE_OBJECTID || 3403 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3404 !btrfs_qgroup_level(rootid))) 3405 return 1; 3406 return 0; 3407 } 3408 3409 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3410 { 3411 return signal_pending(current); 3412 } 3413 3414 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3415 3416 /* Sanity test specific functions */ 3417 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3418 void btrfs_test_inode_set_ops(struct inode *inode); 3419 void btrfs_test_destroy_inode(struct inode *inode); 3420 3421 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3422 { 3423 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3424 } 3425 #else 3426 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3427 { 3428 return 0; 3429 } 3430 #endif 3431 3432 #endif 3433