1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <trace/events/btrfs.h> 20 #include <asm/kmap_types.h> 21 #include <asm/unaligned.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent-io-tree.h" 32 #include "extent_io.h" 33 #include "extent_map.h" 34 #include "async-thread.h" 35 #include "block-rsv.h" 36 37 struct btrfs_trans_handle; 38 struct btrfs_transaction; 39 struct btrfs_pending_snapshot; 40 struct btrfs_delayed_ref_root; 41 struct btrfs_space_info; 42 struct btrfs_block_group; 43 extern struct kmem_cache *btrfs_trans_handle_cachep; 44 extern struct kmem_cache *btrfs_bit_radix_cachep; 45 extern struct kmem_cache *btrfs_path_cachep; 46 extern struct kmem_cache *btrfs_free_space_cachep; 47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 48 struct btrfs_ordered_sum; 49 struct btrfs_ref; 50 51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 52 53 /* 54 * Maximum number of mirrors that can be available for all profiles counting 55 * the target device of dev-replace as one. During an active device replace 56 * procedure, the target device of the copy operation is a mirror for the 57 * filesystem data as well that can be used to read data in order to repair 58 * read errors on other disks. 59 * 60 * Current value is derived from RAID1C4 with 4 copies. 61 */ 62 #define BTRFS_MAX_MIRRORS (4 + 1) 63 64 #define BTRFS_MAX_LEVEL 8 65 66 #define BTRFS_OLDEST_GENERATION 0ULL 67 68 /* 69 * the max metadata block size. This limit is somewhat artificial, 70 * but the memmove costs go through the roof for larger blocks. 71 */ 72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 73 74 /* 75 * we can actually store much bigger names, but lets not confuse the rest 76 * of linux 77 */ 78 #define BTRFS_NAME_LEN 255 79 80 /* 81 * Theoretical limit is larger, but we keep this down to a sane 82 * value. That should limit greatly the possibility of collisions on 83 * inode ref items. 84 */ 85 #define BTRFS_LINK_MAX 65535U 86 87 #define BTRFS_EMPTY_DIR_SIZE 0 88 89 /* ioprio of readahead is set to idle */ 90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 91 92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 93 94 /* 95 * Use large batch size to reduce overhead of metadata updates. On the reader 96 * side, we only read it when we are close to ENOSPC and the read overhead is 97 * mostly related to the number of CPUs, so it is OK to use arbitrary large 98 * value here. 99 */ 100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 101 102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 103 104 105 /* 106 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 107 */ 108 static inline u32 count_max_extents(u64 size) 109 { 110 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 111 } 112 113 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 114 { 115 BUG_ON(num_stripes == 0); 116 return sizeof(struct btrfs_chunk) + 117 sizeof(struct btrfs_stripe) * (num_stripes - 1); 118 } 119 120 /* 121 * Runtime (in-memory) states of filesystem 122 */ 123 enum { 124 /* Global indicator of serious filesystem errors */ 125 BTRFS_FS_STATE_ERROR, 126 /* 127 * Filesystem is being remounted, allow to skip some operations, like 128 * defrag 129 */ 130 BTRFS_FS_STATE_REMOUNTING, 131 /* Track if a transaction abort has been reported on this filesystem */ 132 BTRFS_FS_STATE_TRANS_ABORTED, 133 /* 134 * Bio operations should be blocked on this filesystem because a source 135 * or target device is being destroyed as part of a device replace 136 */ 137 BTRFS_FS_STATE_DEV_REPLACING, 138 /* The btrfs_fs_info created for self-tests */ 139 BTRFS_FS_STATE_DUMMY_FS_INFO, 140 }; 141 142 #define BTRFS_BACKREF_REV_MAX 256 143 #define BTRFS_BACKREF_REV_SHIFT 56 144 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 145 BTRFS_BACKREF_REV_SHIFT) 146 147 #define BTRFS_OLD_BACKREF_REV 0 148 #define BTRFS_MIXED_BACKREF_REV 1 149 150 /* 151 * every tree block (leaf or node) starts with this header. 152 */ 153 struct btrfs_header { 154 /* these first four must match the super block */ 155 u8 csum[BTRFS_CSUM_SIZE]; 156 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 157 __le64 bytenr; /* which block this node is supposed to live in */ 158 __le64 flags; 159 160 /* allowed to be different from the super from here on down */ 161 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 162 __le64 generation; 163 __le64 owner; 164 __le32 nritems; 165 u8 level; 166 } __attribute__ ((__packed__)); 167 168 /* 169 * this is a very generous portion of the super block, giving us 170 * room to translate 14 chunks with 3 stripes each. 171 */ 172 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 173 174 /* 175 * just in case we somehow lose the roots and are not able to mount, 176 * we store an array of the roots from previous transactions 177 * in the super. 178 */ 179 #define BTRFS_NUM_BACKUP_ROOTS 4 180 struct btrfs_root_backup { 181 __le64 tree_root; 182 __le64 tree_root_gen; 183 184 __le64 chunk_root; 185 __le64 chunk_root_gen; 186 187 __le64 extent_root; 188 __le64 extent_root_gen; 189 190 __le64 fs_root; 191 __le64 fs_root_gen; 192 193 __le64 dev_root; 194 __le64 dev_root_gen; 195 196 __le64 csum_root; 197 __le64 csum_root_gen; 198 199 __le64 total_bytes; 200 __le64 bytes_used; 201 __le64 num_devices; 202 /* future */ 203 __le64 unused_64[4]; 204 205 u8 tree_root_level; 206 u8 chunk_root_level; 207 u8 extent_root_level; 208 u8 fs_root_level; 209 u8 dev_root_level; 210 u8 csum_root_level; 211 /* future and to align */ 212 u8 unused_8[10]; 213 } __attribute__ ((__packed__)); 214 215 /* 216 * the super block basically lists the main trees of the FS 217 * it currently lacks any block count etc etc 218 */ 219 struct btrfs_super_block { 220 /* the first 4 fields must match struct btrfs_header */ 221 u8 csum[BTRFS_CSUM_SIZE]; 222 /* FS specific UUID, visible to user */ 223 u8 fsid[BTRFS_FSID_SIZE]; 224 __le64 bytenr; /* this block number */ 225 __le64 flags; 226 227 /* allowed to be different from the btrfs_header from here own down */ 228 __le64 magic; 229 __le64 generation; 230 __le64 root; 231 __le64 chunk_root; 232 __le64 log_root; 233 234 /* this will help find the new super based on the log root */ 235 __le64 log_root_transid; 236 __le64 total_bytes; 237 __le64 bytes_used; 238 __le64 root_dir_objectid; 239 __le64 num_devices; 240 __le32 sectorsize; 241 __le32 nodesize; 242 __le32 __unused_leafsize; 243 __le32 stripesize; 244 __le32 sys_chunk_array_size; 245 __le64 chunk_root_generation; 246 __le64 compat_flags; 247 __le64 compat_ro_flags; 248 __le64 incompat_flags; 249 __le16 csum_type; 250 u8 root_level; 251 u8 chunk_root_level; 252 u8 log_root_level; 253 struct btrfs_dev_item dev_item; 254 255 char label[BTRFS_LABEL_SIZE]; 256 257 __le64 cache_generation; 258 __le64 uuid_tree_generation; 259 260 /* the UUID written into btree blocks */ 261 u8 metadata_uuid[BTRFS_FSID_SIZE]; 262 263 /* future expansion */ 264 __le64 reserved[28]; 265 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 266 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 267 } __attribute__ ((__packed__)); 268 269 /* 270 * Compat flags that we support. If any incompat flags are set other than the 271 * ones specified below then we will fail to mount 272 */ 273 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 274 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 275 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 276 277 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 278 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 279 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 280 281 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 282 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 283 284 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 285 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 286 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 287 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 288 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 289 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 290 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 291 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 292 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 293 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 294 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 295 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 296 BTRFS_FEATURE_INCOMPAT_RAID1C34) 297 298 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 299 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 300 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 301 302 /* 303 * A leaf is full of items. offset and size tell us where to find 304 * the item in the leaf (relative to the start of the data area) 305 */ 306 struct btrfs_item { 307 struct btrfs_disk_key key; 308 __le32 offset; 309 __le32 size; 310 } __attribute__ ((__packed__)); 311 312 /* 313 * leaves have an item area and a data area: 314 * [item0, item1....itemN] [free space] [dataN...data1, data0] 315 * 316 * The data is separate from the items to get the keys closer together 317 * during searches. 318 */ 319 struct btrfs_leaf { 320 struct btrfs_header header; 321 struct btrfs_item items[]; 322 } __attribute__ ((__packed__)); 323 324 /* 325 * all non-leaf blocks are nodes, they hold only keys and pointers to 326 * other blocks 327 */ 328 struct btrfs_key_ptr { 329 struct btrfs_disk_key key; 330 __le64 blockptr; 331 __le64 generation; 332 } __attribute__ ((__packed__)); 333 334 struct btrfs_node { 335 struct btrfs_header header; 336 struct btrfs_key_ptr ptrs[]; 337 } __attribute__ ((__packed__)); 338 339 /* 340 * btrfs_paths remember the path taken from the root down to the leaf. 341 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 342 * to any other levels that are present. 343 * 344 * The slots array records the index of the item or block pointer 345 * used while walking the tree. 346 */ 347 enum { READA_NONE, READA_BACK, READA_FORWARD }; 348 struct btrfs_path { 349 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 350 int slots[BTRFS_MAX_LEVEL]; 351 /* if there is real range locking, this locks field will change */ 352 u8 locks[BTRFS_MAX_LEVEL]; 353 u8 reada; 354 /* keep some upper locks as we walk down */ 355 u8 lowest_level; 356 357 /* 358 * set by btrfs_split_item, tells search_slot to keep all locks 359 * and to force calls to keep space in the nodes 360 */ 361 unsigned int search_for_split:1; 362 unsigned int keep_locks:1; 363 unsigned int skip_locking:1; 364 unsigned int leave_spinning:1; 365 unsigned int search_commit_root:1; 366 unsigned int need_commit_sem:1; 367 unsigned int skip_release_on_error:1; 368 }; 369 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 370 sizeof(struct btrfs_item)) 371 struct btrfs_dev_replace { 372 u64 replace_state; /* see #define above */ 373 time64_t time_started; /* seconds since 1-Jan-1970 */ 374 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 375 atomic64_t num_write_errors; 376 atomic64_t num_uncorrectable_read_errors; 377 378 u64 cursor_left; 379 u64 committed_cursor_left; 380 u64 cursor_left_last_write_of_item; 381 u64 cursor_right; 382 383 u64 cont_reading_from_srcdev_mode; /* see #define above */ 384 385 int is_valid; 386 int item_needs_writeback; 387 struct btrfs_device *srcdev; 388 struct btrfs_device *tgtdev; 389 390 struct mutex lock_finishing_cancel_unmount; 391 struct rw_semaphore rwsem; 392 393 struct btrfs_scrub_progress scrub_progress; 394 395 struct percpu_counter bio_counter; 396 wait_queue_head_t replace_wait; 397 }; 398 399 /* 400 * free clusters are used to claim free space in relatively large chunks, 401 * allowing us to do less seeky writes. They are used for all metadata 402 * allocations. In ssd_spread mode they are also used for data allocations. 403 */ 404 struct btrfs_free_cluster { 405 spinlock_t lock; 406 spinlock_t refill_lock; 407 struct rb_root root; 408 409 /* largest extent in this cluster */ 410 u64 max_size; 411 412 /* first extent starting offset */ 413 u64 window_start; 414 415 /* We did a full search and couldn't create a cluster */ 416 bool fragmented; 417 418 struct btrfs_block_group *block_group; 419 /* 420 * when a cluster is allocated from a block group, we put the 421 * cluster onto a list in the block group so that it can 422 * be freed before the block group is freed. 423 */ 424 struct list_head block_group_list; 425 }; 426 427 enum btrfs_caching_type { 428 BTRFS_CACHE_NO, 429 BTRFS_CACHE_STARTED, 430 BTRFS_CACHE_FAST, 431 BTRFS_CACHE_FINISHED, 432 BTRFS_CACHE_ERROR, 433 }; 434 435 /* 436 * Tree to record all locked full stripes of a RAID5/6 block group 437 */ 438 struct btrfs_full_stripe_locks_tree { 439 struct rb_root root; 440 struct mutex lock; 441 }; 442 443 /* delayed seq elem */ 444 struct seq_list { 445 struct list_head list; 446 u64 seq; 447 }; 448 449 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 450 451 #define SEQ_LAST ((u64)-1) 452 453 enum btrfs_orphan_cleanup_state { 454 ORPHAN_CLEANUP_STARTED = 1, 455 ORPHAN_CLEANUP_DONE = 2, 456 }; 457 458 void btrfs_init_async_reclaim_work(struct work_struct *work); 459 460 /* fs_info */ 461 struct reloc_control; 462 struct btrfs_device; 463 struct btrfs_fs_devices; 464 struct btrfs_balance_control; 465 struct btrfs_delayed_root; 466 467 /* 468 * Block group or device which contains an active swapfile. Used for preventing 469 * unsafe operations while a swapfile is active. 470 * 471 * These are sorted on (ptr, inode) (note that a block group or device can 472 * contain more than one swapfile). We compare the pointer values because we 473 * don't actually care what the object is, we just need a quick check whether 474 * the object exists in the rbtree. 475 */ 476 struct btrfs_swapfile_pin { 477 struct rb_node node; 478 void *ptr; 479 struct inode *inode; 480 /* 481 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 482 * points to a struct btrfs_device. 483 */ 484 bool is_block_group; 485 }; 486 487 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 488 489 enum { 490 BTRFS_FS_BARRIER, 491 BTRFS_FS_CLOSING_START, 492 BTRFS_FS_CLOSING_DONE, 493 BTRFS_FS_LOG_RECOVERING, 494 BTRFS_FS_OPEN, 495 BTRFS_FS_QUOTA_ENABLED, 496 BTRFS_FS_UPDATE_UUID_TREE_GEN, 497 BTRFS_FS_CREATING_FREE_SPACE_TREE, 498 BTRFS_FS_BTREE_ERR, 499 BTRFS_FS_LOG1_ERR, 500 BTRFS_FS_LOG2_ERR, 501 BTRFS_FS_QUOTA_OVERRIDE, 502 /* Used to record internally whether fs has been frozen */ 503 BTRFS_FS_FROZEN, 504 /* 505 * Indicate that a whole-filesystem exclusive operation is running 506 * (device replace, resize, device add/delete, balance) 507 */ 508 BTRFS_FS_EXCL_OP, 509 /* 510 * To info transaction_kthread we need an immediate commit so it 511 * doesn't need to wait for commit_interval 512 */ 513 BTRFS_FS_NEED_ASYNC_COMMIT, 514 /* 515 * Indicate that balance has been set up from the ioctl and is in the 516 * main phase. The fs_info::balance_ctl is initialized. 517 * Set and cleared while holding fs_info::balance_mutex. 518 */ 519 BTRFS_FS_BALANCE_RUNNING, 520 521 /* Indicate that the cleaner thread is awake and doing something. */ 522 BTRFS_FS_CLEANER_RUNNING, 523 524 /* 525 * The checksumming has an optimized version and is considered fast, 526 * so we don't need to offload checksums to workqueues. 527 */ 528 BTRFS_FS_CSUM_IMPL_FAST, 529 }; 530 531 struct btrfs_fs_info { 532 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 533 unsigned long flags; 534 struct btrfs_root *extent_root; 535 struct btrfs_root *tree_root; 536 struct btrfs_root *chunk_root; 537 struct btrfs_root *dev_root; 538 struct btrfs_root *fs_root; 539 struct btrfs_root *csum_root; 540 struct btrfs_root *quota_root; 541 struct btrfs_root *uuid_root; 542 struct btrfs_root *free_space_root; 543 544 /* the log root tree is a directory of all the other log roots */ 545 struct btrfs_root *log_root_tree; 546 547 spinlock_t fs_roots_radix_lock; 548 struct radix_tree_root fs_roots_radix; 549 550 /* block group cache stuff */ 551 spinlock_t block_group_cache_lock; 552 u64 first_logical_byte; 553 struct rb_root block_group_cache_tree; 554 555 /* keep track of unallocated space */ 556 atomic64_t free_chunk_space; 557 558 struct extent_io_tree freed_extents[2]; 559 struct extent_io_tree *pinned_extents; 560 561 /* logical->physical extent mapping */ 562 struct extent_map_tree mapping_tree; 563 564 /* 565 * block reservation for extent, checksum, root tree and 566 * delayed dir index item 567 */ 568 struct btrfs_block_rsv global_block_rsv; 569 /* block reservation for metadata operations */ 570 struct btrfs_block_rsv trans_block_rsv; 571 /* block reservation for chunk tree */ 572 struct btrfs_block_rsv chunk_block_rsv; 573 /* block reservation for delayed operations */ 574 struct btrfs_block_rsv delayed_block_rsv; 575 /* block reservation for delayed refs */ 576 struct btrfs_block_rsv delayed_refs_rsv; 577 578 struct btrfs_block_rsv empty_block_rsv; 579 580 u64 generation; 581 u64 last_trans_committed; 582 u64 avg_delayed_ref_runtime; 583 584 /* 585 * this is updated to the current trans every time a full commit 586 * is required instead of the faster short fsync log commits 587 */ 588 u64 last_trans_log_full_commit; 589 unsigned long mount_opt; 590 /* 591 * Track requests for actions that need to be done during transaction 592 * commit (like for some mount options). 593 */ 594 unsigned long pending_changes; 595 unsigned long compress_type:4; 596 unsigned int compress_level; 597 u32 commit_interval; 598 /* 599 * It is a suggestive number, the read side is safe even it gets a 600 * wrong number because we will write out the data into a regular 601 * extent. The write side(mount/remount) is under ->s_umount lock, 602 * so it is also safe. 603 */ 604 u64 max_inline; 605 606 struct btrfs_transaction *running_transaction; 607 wait_queue_head_t transaction_throttle; 608 wait_queue_head_t transaction_wait; 609 wait_queue_head_t transaction_blocked_wait; 610 wait_queue_head_t async_submit_wait; 611 612 /* 613 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 614 * when they are updated. 615 * 616 * Because we do not clear the flags for ever, so we needn't use 617 * the lock on the read side. 618 * 619 * We also needn't use the lock when we mount the fs, because 620 * there is no other task which will update the flag. 621 */ 622 spinlock_t super_lock; 623 struct btrfs_super_block *super_copy; 624 struct btrfs_super_block *super_for_commit; 625 struct super_block *sb; 626 struct inode *btree_inode; 627 struct mutex tree_log_mutex; 628 struct mutex transaction_kthread_mutex; 629 struct mutex cleaner_mutex; 630 struct mutex chunk_mutex; 631 632 /* 633 * this is taken to make sure we don't set block groups ro after 634 * the free space cache has been allocated on them 635 */ 636 struct mutex ro_block_group_mutex; 637 638 /* this is used during read/modify/write to make sure 639 * no two ios are trying to mod the same stripe at the same 640 * time 641 */ 642 struct btrfs_stripe_hash_table *stripe_hash_table; 643 644 /* 645 * this protects the ordered operations list only while we are 646 * processing all of the entries on it. This way we make 647 * sure the commit code doesn't find the list temporarily empty 648 * because another function happens to be doing non-waiting preflush 649 * before jumping into the main commit. 650 */ 651 struct mutex ordered_operations_mutex; 652 653 struct rw_semaphore commit_root_sem; 654 655 struct rw_semaphore cleanup_work_sem; 656 657 struct rw_semaphore subvol_sem; 658 struct srcu_struct subvol_srcu; 659 660 spinlock_t trans_lock; 661 /* 662 * the reloc mutex goes with the trans lock, it is taken 663 * during commit to protect us from the relocation code 664 */ 665 struct mutex reloc_mutex; 666 667 struct list_head trans_list; 668 struct list_head dead_roots; 669 struct list_head caching_block_groups; 670 671 spinlock_t delayed_iput_lock; 672 struct list_head delayed_iputs; 673 atomic_t nr_delayed_iputs; 674 wait_queue_head_t delayed_iputs_wait; 675 676 /* this protects tree_mod_seq_list */ 677 spinlock_t tree_mod_seq_lock; 678 atomic64_t tree_mod_seq; 679 struct list_head tree_mod_seq_list; 680 681 /* this protects tree_mod_log */ 682 rwlock_t tree_mod_log_lock; 683 struct rb_root tree_mod_log; 684 685 atomic_t async_delalloc_pages; 686 687 /* 688 * this is used to protect the following list -- ordered_roots. 689 */ 690 spinlock_t ordered_root_lock; 691 692 /* 693 * all fs/file tree roots in which there are data=ordered extents 694 * pending writeback are added into this list. 695 * 696 * these can span multiple transactions and basically include 697 * every dirty data page that isn't from nodatacow 698 */ 699 struct list_head ordered_roots; 700 701 struct mutex delalloc_root_mutex; 702 spinlock_t delalloc_root_lock; 703 /* all fs/file tree roots that have delalloc inodes. */ 704 struct list_head delalloc_roots; 705 706 /* 707 * there is a pool of worker threads for checksumming during writes 708 * and a pool for checksumming after reads. This is because readers 709 * can run with FS locks held, and the writers may be waiting for 710 * those locks. We don't want ordering in the pending list to cause 711 * deadlocks, and so the two are serviced separately. 712 * 713 * A third pool does submit_bio to avoid deadlocking with the other 714 * two 715 */ 716 struct btrfs_workqueue *workers; 717 struct btrfs_workqueue *delalloc_workers; 718 struct btrfs_workqueue *flush_workers; 719 struct btrfs_workqueue *endio_workers; 720 struct btrfs_workqueue *endio_meta_workers; 721 struct btrfs_workqueue *endio_raid56_workers; 722 struct btrfs_workqueue *endio_repair_workers; 723 struct btrfs_workqueue *rmw_workers; 724 struct btrfs_workqueue *endio_meta_write_workers; 725 struct btrfs_workqueue *endio_write_workers; 726 struct btrfs_workqueue *endio_freespace_worker; 727 struct btrfs_workqueue *caching_workers; 728 struct btrfs_workqueue *readahead_workers; 729 730 /* 731 * fixup workers take dirty pages that didn't properly go through 732 * the cow mechanism and make them safe to write. It happens 733 * for the sys_munmap function call path 734 */ 735 struct btrfs_workqueue *fixup_workers; 736 struct btrfs_workqueue *delayed_workers; 737 738 struct task_struct *transaction_kthread; 739 struct task_struct *cleaner_kthread; 740 u32 thread_pool_size; 741 742 struct kobject *space_info_kobj; 743 744 u64 total_pinned; 745 746 /* used to keep from writing metadata until there is a nice batch */ 747 struct percpu_counter dirty_metadata_bytes; 748 struct percpu_counter delalloc_bytes; 749 struct percpu_counter dio_bytes; 750 s32 dirty_metadata_batch; 751 s32 delalloc_batch; 752 753 struct list_head dirty_cowonly_roots; 754 755 struct btrfs_fs_devices *fs_devices; 756 757 /* 758 * The space_info list is effectively read only after initial 759 * setup. It is populated at mount time and cleaned up after 760 * all block groups are removed. RCU is used to protect it. 761 */ 762 struct list_head space_info; 763 764 struct btrfs_space_info *data_sinfo; 765 766 struct reloc_control *reloc_ctl; 767 768 /* data_alloc_cluster is only used in ssd_spread mode */ 769 struct btrfs_free_cluster data_alloc_cluster; 770 771 /* all metadata allocations go through this cluster */ 772 struct btrfs_free_cluster meta_alloc_cluster; 773 774 /* auto defrag inodes go here */ 775 spinlock_t defrag_inodes_lock; 776 struct rb_root defrag_inodes; 777 atomic_t defrag_running; 778 779 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 780 seqlock_t profiles_lock; 781 /* 782 * these three are in extended format (availability of single 783 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 784 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 785 */ 786 u64 avail_data_alloc_bits; 787 u64 avail_metadata_alloc_bits; 788 u64 avail_system_alloc_bits; 789 790 /* restriper state */ 791 spinlock_t balance_lock; 792 struct mutex balance_mutex; 793 atomic_t balance_pause_req; 794 atomic_t balance_cancel_req; 795 struct btrfs_balance_control *balance_ctl; 796 wait_queue_head_t balance_wait_q; 797 798 u32 data_chunk_allocations; 799 u32 metadata_ratio; 800 801 void *bdev_holder; 802 803 /* private scrub information */ 804 struct mutex scrub_lock; 805 atomic_t scrubs_running; 806 atomic_t scrub_pause_req; 807 atomic_t scrubs_paused; 808 atomic_t scrub_cancel_req; 809 wait_queue_head_t scrub_pause_wait; 810 /* 811 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 812 * running. 813 */ 814 refcount_t scrub_workers_refcnt; 815 struct btrfs_workqueue *scrub_workers; 816 struct btrfs_workqueue *scrub_wr_completion_workers; 817 struct btrfs_workqueue *scrub_parity_workers; 818 819 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 820 u32 check_integrity_print_mask; 821 #endif 822 /* is qgroup tracking in a consistent state? */ 823 u64 qgroup_flags; 824 825 /* holds configuration and tracking. Protected by qgroup_lock */ 826 struct rb_root qgroup_tree; 827 spinlock_t qgroup_lock; 828 829 /* 830 * used to avoid frequently calling ulist_alloc()/ulist_free() 831 * when doing qgroup accounting, it must be protected by qgroup_lock. 832 */ 833 struct ulist *qgroup_ulist; 834 835 /* protect user change for quota operations */ 836 struct mutex qgroup_ioctl_lock; 837 838 /* list of dirty qgroups to be written at next commit */ 839 struct list_head dirty_qgroups; 840 841 /* used by qgroup for an efficient tree traversal */ 842 u64 qgroup_seq; 843 844 /* qgroup rescan items */ 845 struct mutex qgroup_rescan_lock; /* protects the progress item */ 846 struct btrfs_key qgroup_rescan_progress; 847 struct btrfs_workqueue *qgroup_rescan_workers; 848 struct completion qgroup_rescan_completion; 849 struct btrfs_work qgroup_rescan_work; 850 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 851 852 /* filesystem state */ 853 unsigned long fs_state; 854 855 struct btrfs_delayed_root *delayed_root; 856 857 /* readahead tree */ 858 spinlock_t reada_lock; 859 struct radix_tree_root reada_tree; 860 861 /* readahead works cnt */ 862 atomic_t reada_works_cnt; 863 864 /* Extent buffer radix tree */ 865 spinlock_t buffer_lock; 866 struct radix_tree_root buffer_radix; 867 868 /* next backup root to be overwritten */ 869 int backup_root_index; 870 871 /* device replace state */ 872 struct btrfs_dev_replace dev_replace; 873 874 struct semaphore uuid_tree_rescan_sem; 875 876 /* Used to reclaim the metadata space in the background. */ 877 struct work_struct async_reclaim_work; 878 879 spinlock_t unused_bgs_lock; 880 struct list_head unused_bgs; 881 struct mutex unused_bg_unpin_mutex; 882 struct mutex delete_unused_bgs_mutex; 883 884 /* Cached block sizes */ 885 u32 nodesize; 886 u32 sectorsize; 887 u32 stripesize; 888 889 /* Block groups and devices containing active swapfiles. */ 890 spinlock_t swapfile_pins_lock; 891 struct rb_root swapfile_pins; 892 893 struct crypto_shash *csum_shash; 894 895 /* 896 * Number of send operations in progress. 897 * Updated while holding fs_info::balance_mutex. 898 */ 899 int send_in_progress; 900 901 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 902 spinlock_t ref_verify_lock; 903 struct rb_root block_tree; 904 #endif 905 }; 906 907 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 908 { 909 return sb->s_fs_info; 910 } 911 912 struct btrfs_subvolume_writers { 913 struct percpu_counter counter; 914 wait_queue_head_t wait; 915 }; 916 917 /* 918 * The state of btrfs root 919 */ 920 enum { 921 /* 922 * btrfs_record_root_in_trans is a multi-step process, and it can race 923 * with the balancing code. But the race is very small, and only the 924 * first time the root is added to each transaction. So IN_TRANS_SETUP 925 * is used to tell us when more checks are required 926 */ 927 BTRFS_ROOT_IN_TRANS_SETUP, 928 BTRFS_ROOT_REF_COWS, 929 BTRFS_ROOT_TRACK_DIRTY, 930 BTRFS_ROOT_IN_RADIX, 931 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 932 BTRFS_ROOT_DEFRAG_RUNNING, 933 BTRFS_ROOT_FORCE_COW, 934 BTRFS_ROOT_MULTI_LOG_TASKS, 935 BTRFS_ROOT_DIRTY, 936 BTRFS_ROOT_DELETING, 937 938 /* 939 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 940 * 941 * Set for the subvolume tree owning the reloc tree. 942 */ 943 BTRFS_ROOT_DEAD_RELOC_TREE, 944 /* Mark dead root stored on device whose cleanup needs to be resumed */ 945 BTRFS_ROOT_DEAD_TREE, 946 }; 947 948 /* 949 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 950 * code. For detail check comment in fs/btrfs/qgroup.c. 951 */ 952 struct btrfs_qgroup_swapped_blocks { 953 spinlock_t lock; 954 /* RM_EMPTY_ROOT() of above blocks[] */ 955 bool swapped; 956 struct rb_root blocks[BTRFS_MAX_LEVEL]; 957 }; 958 959 /* 960 * in ram representation of the tree. extent_root is used for all allocations 961 * and for the extent tree extent_root root. 962 */ 963 struct btrfs_root { 964 struct extent_buffer *node; 965 966 struct extent_buffer *commit_root; 967 struct btrfs_root *log_root; 968 struct btrfs_root *reloc_root; 969 970 unsigned long state; 971 struct btrfs_root_item root_item; 972 struct btrfs_key root_key; 973 struct btrfs_fs_info *fs_info; 974 struct extent_io_tree dirty_log_pages; 975 976 struct mutex objectid_mutex; 977 978 spinlock_t accounting_lock; 979 struct btrfs_block_rsv *block_rsv; 980 981 /* free ino cache stuff */ 982 struct btrfs_free_space_ctl *free_ino_ctl; 983 enum btrfs_caching_type ino_cache_state; 984 spinlock_t ino_cache_lock; 985 wait_queue_head_t ino_cache_wait; 986 struct btrfs_free_space_ctl *free_ino_pinned; 987 u64 ino_cache_progress; 988 struct inode *ino_cache_inode; 989 990 struct mutex log_mutex; 991 wait_queue_head_t log_writer_wait; 992 wait_queue_head_t log_commit_wait[2]; 993 struct list_head log_ctxs[2]; 994 atomic_t log_writers; 995 atomic_t log_commit[2]; 996 atomic_t log_batch; 997 int log_transid; 998 /* No matter the commit succeeds or not*/ 999 int log_transid_committed; 1000 /* Just be updated when the commit succeeds. */ 1001 int last_log_commit; 1002 pid_t log_start_pid; 1003 1004 u64 last_trans; 1005 1006 u32 type; 1007 1008 u64 highest_objectid; 1009 1010 u64 defrag_trans_start; 1011 struct btrfs_key defrag_progress; 1012 struct btrfs_key defrag_max; 1013 1014 /* the dirty list is only used by non-reference counted roots */ 1015 struct list_head dirty_list; 1016 1017 struct list_head root_list; 1018 1019 spinlock_t log_extents_lock[2]; 1020 struct list_head logged_list[2]; 1021 1022 int orphan_cleanup_state; 1023 1024 spinlock_t inode_lock; 1025 /* red-black tree that keeps track of in-memory inodes */ 1026 struct rb_root inode_tree; 1027 1028 /* 1029 * radix tree that keeps track of delayed nodes of every inode, 1030 * protected by inode_lock 1031 */ 1032 struct radix_tree_root delayed_nodes_tree; 1033 /* 1034 * right now this just gets used so that a root has its own devid 1035 * for stat. It may be used for more later 1036 */ 1037 dev_t anon_dev; 1038 1039 spinlock_t root_item_lock; 1040 refcount_t refs; 1041 1042 struct mutex delalloc_mutex; 1043 spinlock_t delalloc_lock; 1044 /* 1045 * all of the inodes that have delalloc bytes. It is possible for 1046 * this list to be empty even when there is still dirty data=ordered 1047 * extents waiting to finish IO. 1048 */ 1049 struct list_head delalloc_inodes; 1050 struct list_head delalloc_root; 1051 u64 nr_delalloc_inodes; 1052 1053 struct mutex ordered_extent_mutex; 1054 /* 1055 * this is used by the balancing code to wait for all the pending 1056 * ordered extents 1057 */ 1058 spinlock_t ordered_extent_lock; 1059 1060 /* 1061 * all of the data=ordered extents pending writeback 1062 * these can span multiple transactions and basically include 1063 * every dirty data page that isn't from nodatacow 1064 */ 1065 struct list_head ordered_extents; 1066 struct list_head ordered_root; 1067 u64 nr_ordered_extents; 1068 1069 /* 1070 * Not empty if this subvolume root has gone through tree block swap 1071 * (relocation) 1072 * 1073 * Will be used by reloc_control::dirty_subvol_roots. 1074 */ 1075 struct list_head reloc_dirty_list; 1076 1077 /* 1078 * Number of currently running SEND ioctls to prevent 1079 * manipulation with the read-only status via SUBVOL_SETFLAGS 1080 */ 1081 int send_in_progress; 1082 /* 1083 * Number of currently running deduplication operations that have a 1084 * destination inode belonging to this root. Protected by the lock 1085 * root_item_lock. 1086 */ 1087 int dedupe_in_progress; 1088 struct btrfs_subvolume_writers *subv_writers; 1089 atomic_t will_be_snapshotted; 1090 atomic_t snapshot_force_cow; 1091 1092 /* For qgroup metadata reserved space */ 1093 spinlock_t qgroup_meta_rsv_lock; 1094 u64 qgroup_meta_rsv_pertrans; 1095 u64 qgroup_meta_rsv_prealloc; 1096 1097 /* Number of active swapfiles */ 1098 atomic_t nr_swapfiles; 1099 1100 /* Record pairs of swapped blocks for qgroup */ 1101 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1102 1103 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1104 u64 alloc_bytenr; 1105 #endif 1106 }; 1107 1108 struct btrfs_clone_extent_info { 1109 u64 disk_offset; 1110 u64 disk_len; 1111 u64 data_offset; 1112 u64 data_len; 1113 u64 file_offset; 1114 char *extent_buf; 1115 u32 item_size; 1116 }; 1117 1118 struct btrfs_file_private { 1119 void *filldir_buf; 1120 }; 1121 1122 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1123 { 1124 return btrfs_sb(inode->i_sb)->sectorsize; 1125 } 1126 1127 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1128 { 1129 1130 return info->nodesize - sizeof(struct btrfs_header); 1131 } 1132 1133 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1134 1135 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1136 { 1137 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1138 } 1139 1140 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1141 { 1142 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1143 } 1144 1145 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1146 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1147 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1148 { 1149 return BTRFS_MAX_ITEM_SIZE(info) - 1150 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1151 } 1152 1153 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1154 { 1155 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1156 } 1157 1158 /* 1159 * Flags for mount options. 1160 * 1161 * Note: don't forget to add new options to btrfs_show_options() 1162 */ 1163 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1164 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1165 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1166 #define BTRFS_MOUNT_SSD (1 << 3) 1167 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1168 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1169 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1170 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1171 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1172 #define BTRFS_MOUNT_NOSSD (1 << 9) 1173 #define BTRFS_MOUNT_DISCARD (1 << 10) 1174 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1175 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1176 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1177 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1178 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1179 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1180 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1181 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1182 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1183 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1184 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1185 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1186 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1187 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1188 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1189 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1190 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1191 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1192 1193 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1194 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1195 1196 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1197 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1198 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1199 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1200 BTRFS_MOUNT_##opt) 1201 1202 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1203 { \ 1204 if (!btrfs_test_opt(fs_info, opt)) \ 1205 btrfs_info(fs_info, fmt, ##args); \ 1206 btrfs_set_opt(fs_info->mount_opt, opt); \ 1207 } 1208 1209 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1210 { \ 1211 if (btrfs_test_opt(fs_info, opt)) \ 1212 btrfs_info(fs_info, fmt, ##args); \ 1213 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1214 } 1215 1216 /* 1217 * Requests for changes that need to be done during transaction commit. 1218 * 1219 * Internal mount options that are used for special handling of the real 1220 * mount options (eg. cannot be set during remount and have to be set during 1221 * transaction commit) 1222 */ 1223 1224 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1225 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1226 #define BTRFS_PENDING_COMMIT (2) 1227 1228 #define btrfs_test_pending(info, opt) \ 1229 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1230 #define btrfs_set_pending(info, opt) \ 1231 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1232 #define btrfs_clear_pending(info, opt) \ 1233 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1234 1235 /* 1236 * Helpers for setting pending mount option changes. 1237 * 1238 * Expects corresponding macros 1239 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1240 */ 1241 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1242 do { \ 1243 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1244 btrfs_info((info), fmt, ##args); \ 1245 btrfs_set_pending((info), SET_##opt); \ 1246 btrfs_clear_pending((info), CLEAR_##opt); \ 1247 } \ 1248 } while(0) 1249 1250 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1251 do { \ 1252 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1253 btrfs_info((info), fmt, ##args); \ 1254 btrfs_set_pending((info), CLEAR_##opt); \ 1255 btrfs_clear_pending((info), SET_##opt); \ 1256 } \ 1257 } while(0) 1258 1259 /* 1260 * Inode flags 1261 */ 1262 #define BTRFS_INODE_NODATASUM (1 << 0) 1263 #define BTRFS_INODE_NODATACOW (1 << 1) 1264 #define BTRFS_INODE_READONLY (1 << 2) 1265 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1266 #define BTRFS_INODE_PREALLOC (1 << 4) 1267 #define BTRFS_INODE_SYNC (1 << 5) 1268 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1269 #define BTRFS_INODE_APPEND (1 << 7) 1270 #define BTRFS_INODE_NODUMP (1 << 8) 1271 #define BTRFS_INODE_NOATIME (1 << 9) 1272 #define BTRFS_INODE_DIRSYNC (1 << 10) 1273 #define BTRFS_INODE_COMPRESS (1 << 11) 1274 1275 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1276 1277 #define BTRFS_INODE_FLAG_MASK \ 1278 (BTRFS_INODE_NODATASUM | \ 1279 BTRFS_INODE_NODATACOW | \ 1280 BTRFS_INODE_READONLY | \ 1281 BTRFS_INODE_NOCOMPRESS | \ 1282 BTRFS_INODE_PREALLOC | \ 1283 BTRFS_INODE_SYNC | \ 1284 BTRFS_INODE_IMMUTABLE | \ 1285 BTRFS_INODE_APPEND | \ 1286 BTRFS_INODE_NODUMP | \ 1287 BTRFS_INODE_NOATIME | \ 1288 BTRFS_INODE_DIRSYNC | \ 1289 BTRFS_INODE_COMPRESS | \ 1290 BTRFS_INODE_ROOT_ITEM_INIT) 1291 1292 struct btrfs_map_token { 1293 const struct extent_buffer *eb; 1294 char *kaddr; 1295 unsigned long offset; 1296 }; 1297 1298 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1299 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1300 1301 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1302 struct extent_buffer *eb) 1303 { 1304 token->eb = eb; 1305 token->kaddr = NULL; 1306 } 1307 1308 /* some macros to generate set/get functions for the struct fields. This 1309 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1310 * one for u8: 1311 */ 1312 #define le8_to_cpu(v) (v) 1313 #define cpu_to_le8(v) (v) 1314 #define __le8 u8 1315 1316 #define read_eb_member(eb, ptr, type, member, result) (\ 1317 read_extent_buffer(eb, (char *)(result), \ 1318 ((unsigned long)(ptr)) + \ 1319 offsetof(type, member), \ 1320 sizeof(((type *)0)->member))) 1321 1322 #define write_eb_member(eb, ptr, type, member, result) (\ 1323 write_extent_buffer(eb, (char *)(result), \ 1324 ((unsigned long)(ptr)) + \ 1325 offsetof(type, member), \ 1326 sizeof(((type *)0)->member))) 1327 1328 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1329 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1330 const void *ptr, unsigned long off, \ 1331 struct btrfs_map_token *token); \ 1332 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1333 unsigned long off, u##bits val, \ 1334 struct btrfs_map_token *token); \ 1335 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1336 const void *ptr, unsigned long off); \ 1337 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1338 unsigned long off, u##bits val); 1339 1340 DECLARE_BTRFS_SETGET_BITS(8) 1341 DECLARE_BTRFS_SETGET_BITS(16) 1342 DECLARE_BTRFS_SETGET_BITS(32) 1343 DECLARE_BTRFS_SETGET_BITS(64) 1344 1345 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1346 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1347 const type *s) \ 1348 { \ 1349 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1350 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1351 } \ 1352 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1353 u##bits val) \ 1354 { \ 1355 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1356 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1357 } \ 1358 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1359 const type *s, \ 1360 struct btrfs_map_token *token) \ 1361 { \ 1362 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1363 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1364 } \ 1365 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1366 type *s, u##bits val, \ 1367 struct btrfs_map_token *token) \ 1368 { \ 1369 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1370 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1371 } 1372 1373 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1374 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1375 { \ 1376 const type *p = page_address(eb->pages[0]); \ 1377 u##bits res = le##bits##_to_cpu(p->member); \ 1378 return res; \ 1379 } \ 1380 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1381 u##bits val) \ 1382 { \ 1383 type *p = page_address(eb->pages[0]); \ 1384 p->member = cpu_to_le##bits(val); \ 1385 } 1386 1387 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1388 static inline u##bits btrfs_##name(const type *s) \ 1389 { \ 1390 return le##bits##_to_cpu(s->member); \ 1391 } \ 1392 static inline void btrfs_set_##name(type *s, u##bits val) \ 1393 { \ 1394 s->member = cpu_to_le##bits(val); \ 1395 } 1396 1397 1398 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1399 struct btrfs_dev_item *s) 1400 { 1401 BUILD_BUG_ON(sizeof(u64) != 1402 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1403 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1404 total_bytes)); 1405 } 1406 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1407 struct btrfs_dev_item *s, 1408 u64 val) 1409 { 1410 BUILD_BUG_ON(sizeof(u64) != 1411 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1412 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1413 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1414 } 1415 1416 1417 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1418 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1419 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1420 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1421 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1422 start_offset, 64); 1423 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1424 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1425 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1426 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1427 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1428 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1429 1430 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1431 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1432 total_bytes, 64); 1433 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1434 bytes_used, 64); 1435 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1436 io_align, 32); 1437 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1438 io_width, 32); 1439 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1440 sector_size, 32); 1441 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1442 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1443 dev_group, 32); 1444 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1445 seek_speed, 8); 1446 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1447 bandwidth, 8); 1448 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1449 generation, 64); 1450 1451 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1452 { 1453 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1454 } 1455 1456 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1457 { 1458 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1459 } 1460 1461 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1462 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1463 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1464 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1465 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1466 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1467 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1468 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1469 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1470 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1471 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1472 1473 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1474 { 1475 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1476 } 1477 1478 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1479 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1480 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1481 stripe_len, 64); 1482 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1483 io_align, 32); 1484 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1485 io_width, 32); 1486 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1487 sector_size, 32); 1488 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1489 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1490 num_stripes, 16); 1491 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1492 sub_stripes, 16); 1493 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1494 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1495 1496 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1497 int nr) 1498 { 1499 unsigned long offset = (unsigned long)c; 1500 offset += offsetof(struct btrfs_chunk, stripe); 1501 offset += nr * sizeof(struct btrfs_stripe); 1502 return (struct btrfs_stripe *)offset; 1503 } 1504 1505 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1506 { 1507 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1508 } 1509 1510 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1511 struct btrfs_chunk *c, int nr) 1512 { 1513 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1514 } 1515 1516 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1517 struct btrfs_chunk *c, int nr) 1518 { 1519 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1520 } 1521 1522 /* struct btrfs_block_group_item */ 1523 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1524 used, 64); 1525 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1526 used, 64); 1527 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1528 struct btrfs_block_group_item, chunk_objectid, 64); 1529 1530 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1531 struct btrfs_block_group_item, chunk_objectid, 64); 1532 BTRFS_SETGET_FUNCS(block_group_flags, 1533 struct btrfs_block_group_item, flags, 64); 1534 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1535 struct btrfs_block_group_item, flags, 64); 1536 1537 /* struct btrfs_free_space_info */ 1538 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1539 extent_count, 32); 1540 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1541 1542 /* struct btrfs_inode_ref */ 1543 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1544 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1545 1546 /* struct btrfs_inode_extref */ 1547 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1548 parent_objectid, 64); 1549 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1550 name_len, 16); 1551 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1552 1553 /* struct btrfs_inode_item */ 1554 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1555 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1556 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1557 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1558 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1559 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1560 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1561 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1562 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1563 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1564 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1565 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1566 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1567 generation, 64); 1568 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1569 sequence, 64); 1570 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1571 transid, 64); 1572 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1573 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1574 nbytes, 64); 1575 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1576 block_group, 64); 1577 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1578 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1579 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1580 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1581 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1582 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1583 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1584 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1585 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1586 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1587 1588 /* struct btrfs_dev_extent */ 1589 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1590 chunk_tree, 64); 1591 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1592 chunk_objectid, 64); 1593 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1594 chunk_offset, 64); 1595 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1596 1597 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1598 { 1599 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1600 return (unsigned long)dev + ptr; 1601 } 1602 1603 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1604 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1605 generation, 64); 1606 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1607 1608 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1609 1610 1611 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1612 1613 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1614 struct btrfs_tree_block_info *item, 1615 struct btrfs_disk_key *key) 1616 { 1617 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1618 } 1619 1620 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1621 struct btrfs_tree_block_info *item, 1622 struct btrfs_disk_key *key) 1623 { 1624 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1625 } 1626 1627 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1628 root, 64); 1629 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1630 objectid, 64); 1631 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1632 offset, 64); 1633 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1634 count, 32); 1635 1636 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1637 count, 32); 1638 1639 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1640 type, 8); 1641 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1642 offset, 64); 1643 1644 static inline u32 btrfs_extent_inline_ref_size(int type) 1645 { 1646 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1647 type == BTRFS_SHARED_BLOCK_REF_KEY) 1648 return sizeof(struct btrfs_extent_inline_ref); 1649 if (type == BTRFS_SHARED_DATA_REF_KEY) 1650 return sizeof(struct btrfs_shared_data_ref) + 1651 sizeof(struct btrfs_extent_inline_ref); 1652 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1653 return sizeof(struct btrfs_extent_data_ref) + 1654 offsetof(struct btrfs_extent_inline_ref, offset); 1655 return 0; 1656 } 1657 1658 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1659 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1660 generation, 64); 1661 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1662 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1663 1664 /* struct btrfs_node */ 1665 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1666 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1667 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1668 blockptr, 64); 1669 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1670 generation, 64); 1671 1672 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1673 { 1674 unsigned long ptr; 1675 ptr = offsetof(struct btrfs_node, ptrs) + 1676 sizeof(struct btrfs_key_ptr) * nr; 1677 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1678 } 1679 1680 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1681 int nr, u64 val) 1682 { 1683 unsigned long ptr; 1684 ptr = offsetof(struct btrfs_node, ptrs) + 1685 sizeof(struct btrfs_key_ptr) * nr; 1686 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1687 } 1688 1689 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1690 { 1691 unsigned long ptr; 1692 ptr = offsetof(struct btrfs_node, ptrs) + 1693 sizeof(struct btrfs_key_ptr) * nr; 1694 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1695 } 1696 1697 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1698 int nr, u64 val) 1699 { 1700 unsigned long ptr; 1701 ptr = offsetof(struct btrfs_node, ptrs) + 1702 sizeof(struct btrfs_key_ptr) * nr; 1703 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1704 } 1705 1706 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1707 { 1708 return offsetof(struct btrfs_node, ptrs) + 1709 sizeof(struct btrfs_key_ptr) * nr; 1710 } 1711 1712 void btrfs_node_key(const struct extent_buffer *eb, 1713 struct btrfs_disk_key *disk_key, int nr); 1714 1715 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1716 struct btrfs_disk_key *disk_key, int nr) 1717 { 1718 unsigned long ptr; 1719 ptr = btrfs_node_key_ptr_offset(nr); 1720 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1721 struct btrfs_key_ptr, key, disk_key); 1722 } 1723 1724 /* struct btrfs_item */ 1725 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1726 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1727 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1728 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1729 1730 static inline unsigned long btrfs_item_nr_offset(int nr) 1731 { 1732 return offsetof(struct btrfs_leaf, items) + 1733 sizeof(struct btrfs_item) * nr; 1734 } 1735 1736 static inline struct btrfs_item *btrfs_item_nr(int nr) 1737 { 1738 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1739 } 1740 1741 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1742 struct btrfs_item *item) 1743 { 1744 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1745 } 1746 1747 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1748 { 1749 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1750 } 1751 1752 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1753 { 1754 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1755 } 1756 1757 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1758 { 1759 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1760 } 1761 1762 static inline void btrfs_item_key(const struct extent_buffer *eb, 1763 struct btrfs_disk_key *disk_key, int nr) 1764 { 1765 struct btrfs_item *item = btrfs_item_nr(nr); 1766 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1767 } 1768 1769 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1770 struct btrfs_disk_key *disk_key, int nr) 1771 { 1772 struct btrfs_item *item = btrfs_item_nr(nr); 1773 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1774 } 1775 1776 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1777 1778 /* 1779 * struct btrfs_root_ref 1780 */ 1781 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1782 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1783 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1784 1785 /* struct btrfs_dir_item */ 1786 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1787 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1788 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1789 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1790 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1791 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1792 data_len, 16); 1793 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1794 name_len, 16); 1795 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1796 transid, 64); 1797 1798 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1799 const struct btrfs_dir_item *item, 1800 struct btrfs_disk_key *key) 1801 { 1802 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1803 } 1804 1805 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1806 struct btrfs_dir_item *item, 1807 const struct btrfs_disk_key *key) 1808 { 1809 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1810 } 1811 1812 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1813 num_entries, 64); 1814 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1815 num_bitmaps, 64); 1816 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1817 generation, 64); 1818 1819 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1820 const struct btrfs_free_space_header *h, 1821 struct btrfs_disk_key *key) 1822 { 1823 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1824 } 1825 1826 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1827 struct btrfs_free_space_header *h, 1828 const struct btrfs_disk_key *key) 1829 { 1830 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1831 } 1832 1833 /* struct btrfs_disk_key */ 1834 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1835 objectid, 64); 1836 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1837 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1838 1839 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1840 const struct btrfs_disk_key *disk) 1841 { 1842 cpu->offset = le64_to_cpu(disk->offset); 1843 cpu->type = disk->type; 1844 cpu->objectid = le64_to_cpu(disk->objectid); 1845 } 1846 1847 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1848 const struct btrfs_key *cpu) 1849 { 1850 disk->offset = cpu_to_le64(cpu->offset); 1851 disk->type = cpu->type; 1852 disk->objectid = cpu_to_le64(cpu->objectid); 1853 } 1854 1855 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1856 struct btrfs_key *key, int nr) 1857 { 1858 struct btrfs_disk_key disk_key; 1859 btrfs_node_key(eb, &disk_key, nr); 1860 btrfs_disk_key_to_cpu(key, &disk_key); 1861 } 1862 1863 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1864 struct btrfs_key *key, int nr) 1865 { 1866 struct btrfs_disk_key disk_key; 1867 btrfs_item_key(eb, &disk_key, nr); 1868 btrfs_disk_key_to_cpu(key, &disk_key); 1869 } 1870 1871 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1872 const struct btrfs_dir_item *item, 1873 struct btrfs_key *key) 1874 { 1875 struct btrfs_disk_key disk_key; 1876 btrfs_dir_item_key(eb, item, &disk_key); 1877 btrfs_disk_key_to_cpu(key, &disk_key); 1878 } 1879 1880 /* struct btrfs_header */ 1881 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1882 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1883 generation, 64); 1884 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1885 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1886 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1887 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1888 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 1889 generation, 64); 1890 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 1891 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 1892 nritems, 32); 1893 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 1894 1895 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 1896 { 1897 return (btrfs_header_flags(eb) & flag) == flag; 1898 } 1899 1900 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1901 { 1902 u64 flags = btrfs_header_flags(eb); 1903 btrfs_set_header_flags(eb, flags | flag); 1904 } 1905 1906 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1907 { 1908 u64 flags = btrfs_header_flags(eb); 1909 btrfs_set_header_flags(eb, flags & ~flag); 1910 } 1911 1912 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 1913 { 1914 u64 flags = btrfs_header_flags(eb); 1915 return flags >> BTRFS_BACKREF_REV_SHIFT; 1916 } 1917 1918 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1919 int rev) 1920 { 1921 u64 flags = btrfs_header_flags(eb); 1922 flags &= ~BTRFS_BACKREF_REV_MASK; 1923 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1924 btrfs_set_header_flags(eb, flags); 1925 } 1926 1927 static inline unsigned long btrfs_header_fsid(void) 1928 { 1929 return offsetof(struct btrfs_header, fsid); 1930 } 1931 1932 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 1933 { 1934 return offsetof(struct btrfs_header, chunk_tree_uuid); 1935 } 1936 1937 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 1938 { 1939 return btrfs_header_level(eb) == 0; 1940 } 1941 1942 /* struct btrfs_root_item */ 1943 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1944 generation, 64); 1945 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1946 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1947 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1948 1949 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1950 generation, 64); 1951 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1952 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 1953 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 1954 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 1955 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 1956 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 1957 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 1958 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 1959 last_snapshot, 64); 1960 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 1961 generation_v2, 64); 1962 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 1963 ctransid, 64); 1964 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 1965 otransid, 64); 1966 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 1967 stransid, 64); 1968 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 1969 rtransid, 64); 1970 1971 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 1972 { 1973 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 1974 } 1975 1976 static inline bool btrfs_root_dead(const struct btrfs_root *root) 1977 { 1978 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 1979 } 1980 1981 /* struct btrfs_root_backup */ 1982 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 1983 tree_root, 64); 1984 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 1985 tree_root_gen, 64); 1986 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 1987 tree_root_level, 8); 1988 1989 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 1990 chunk_root, 64); 1991 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 1992 chunk_root_gen, 64); 1993 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 1994 chunk_root_level, 8); 1995 1996 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 1997 extent_root, 64); 1998 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 1999 extent_root_gen, 64); 2000 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2001 extent_root_level, 8); 2002 2003 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2004 fs_root, 64); 2005 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2006 fs_root_gen, 64); 2007 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2008 fs_root_level, 8); 2009 2010 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2011 dev_root, 64); 2012 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2013 dev_root_gen, 64); 2014 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2015 dev_root_level, 8); 2016 2017 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2018 csum_root, 64); 2019 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2020 csum_root_gen, 64); 2021 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2022 csum_root_level, 8); 2023 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2024 total_bytes, 64); 2025 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2026 bytes_used, 64); 2027 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2028 num_devices, 64); 2029 2030 /* struct btrfs_balance_item */ 2031 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2032 2033 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2034 const struct btrfs_balance_item *bi, 2035 struct btrfs_disk_balance_args *ba) 2036 { 2037 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2038 } 2039 2040 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2041 struct btrfs_balance_item *bi, 2042 const struct btrfs_disk_balance_args *ba) 2043 { 2044 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2045 } 2046 2047 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2048 const struct btrfs_balance_item *bi, 2049 struct btrfs_disk_balance_args *ba) 2050 { 2051 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2052 } 2053 2054 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2055 struct btrfs_balance_item *bi, 2056 const struct btrfs_disk_balance_args *ba) 2057 { 2058 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2059 } 2060 2061 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2062 const struct btrfs_balance_item *bi, 2063 struct btrfs_disk_balance_args *ba) 2064 { 2065 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2066 } 2067 2068 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2069 struct btrfs_balance_item *bi, 2070 const struct btrfs_disk_balance_args *ba) 2071 { 2072 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2073 } 2074 2075 static inline void 2076 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2077 const struct btrfs_disk_balance_args *disk) 2078 { 2079 memset(cpu, 0, sizeof(*cpu)); 2080 2081 cpu->profiles = le64_to_cpu(disk->profiles); 2082 cpu->usage = le64_to_cpu(disk->usage); 2083 cpu->devid = le64_to_cpu(disk->devid); 2084 cpu->pstart = le64_to_cpu(disk->pstart); 2085 cpu->pend = le64_to_cpu(disk->pend); 2086 cpu->vstart = le64_to_cpu(disk->vstart); 2087 cpu->vend = le64_to_cpu(disk->vend); 2088 cpu->target = le64_to_cpu(disk->target); 2089 cpu->flags = le64_to_cpu(disk->flags); 2090 cpu->limit = le64_to_cpu(disk->limit); 2091 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2092 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2093 } 2094 2095 static inline void 2096 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2097 const struct btrfs_balance_args *cpu) 2098 { 2099 memset(disk, 0, sizeof(*disk)); 2100 2101 disk->profiles = cpu_to_le64(cpu->profiles); 2102 disk->usage = cpu_to_le64(cpu->usage); 2103 disk->devid = cpu_to_le64(cpu->devid); 2104 disk->pstart = cpu_to_le64(cpu->pstart); 2105 disk->pend = cpu_to_le64(cpu->pend); 2106 disk->vstart = cpu_to_le64(cpu->vstart); 2107 disk->vend = cpu_to_le64(cpu->vend); 2108 disk->target = cpu_to_le64(cpu->target); 2109 disk->flags = cpu_to_le64(cpu->flags); 2110 disk->limit = cpu_to_le64(cpu->limit); 2111 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2112 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2113 } 2114 2115 /* struct btrfs_super_block */ 2116 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2117 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2118 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2119 generation, 64); 2120 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2121 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2122 struct btrfs_super_block, sys_chunk_array_size, 32); 2123 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2124 struct btrfs_super_block, chunk_root_generation, 64); 2125 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2126 root_level, 8); 2127 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2128 chunk_root, 64); 2129 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2130 chunk_root_level, 8); 2131 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2132 log_root, 64); 2133 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2134 log_root_transid, 64); 2135 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2136 log_root_level, 8); 2137 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2138 total_bytes, 64); 2139 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2140 bytes_used, 64); 2141 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2142 sectorsize, 32); 2143 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2144 nodesize, 32); 2145 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2146 stripesize, 32); 2147 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2148 root_dir_objectid, 64); 2149 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2150 num_devices, 64); 2151 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2152 compat_flags, 64); 2153 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2154 compat_ro_flags, 64); 2155 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2156 incompat_flags, 64); 2157 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2158 csum_type, 16); 2159 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2160 cache_generation, 64); 2161 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2162 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2163 uuid_tree_generation, 64); 2164 2165 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2166 const char *btrfs_super_csum_name(u16 csum_type); 2167 const char *btrfs_super_csum_driver(u16 csum_type); 2168 size_t __const btrfs_get_num_csums(void); 2169 2170 2171 /* 2172 * The leaf data grows from end-to-front in the node. 2173 * this returns the address of the start of the last item, 2174 * which is the stop of the leaf data stack 2175 */ 2176 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2177 { 2178 u32 nr = btrfs_header_nritems(leaf); 2179 2180 if (nr == 0) 2181 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2182 return btrfs_item_offset_nr(leaf, nr - 1); 2183 } 2184 2185 /* struct btrfs_file_extent_item */ 2186 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2187 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2188 struct btrfs_file_extent_item, disk_bytenr, 64); 2189 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2190 struct btrfs_file_extent_item, offset, 64); 2191 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2192 struct btrfs_file_extent_item, generation, 64); 2193 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2194 struct btrfs_file_extent_item, num_bytes, 64); 2195 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2196 struct btrfs_file_extent_item, disk_num_bytes, 64); 2197 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2198 struct btrfs_file_extent_item, compression, 8); 2199 2200 static inline unsigned long 2201 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2202 { 2203 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2204 } 2205 2206 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2207 { 2208 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2209 } 2210 2211 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2212 disk_bytenr, 64); 2213 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2214 generation, 64); 2215 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2216 disk_num_bytes, 64); 2217 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2218 offset, 64); 2219 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2220 num_bytes, 64); 2221 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2222 ram_bytes, 64); 2223 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2224 compression, 8); 2225 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2226 encryption, 8); 2227 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2228 other_encoding, 16); 2229 2230 /* 2231 * this returns the number of bytes used by the item on disk, minus the 2232 * size of any extent headers. If a file is compressed on disk, this is 2233 * the compressed size 2234 */ 2235 static inline u32 btrfs_file_extent_inline_item_len( 2236 const struct extent_buffer *eb, 2237 struct btrfs_item *e) 2238 { 2239 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2240 } 2241 2242 /* btrfs_qgroup_status_item */ 2243 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2244 generation, 64); 2245 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2246 version, 64); 2247 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2248 flags, 64); 2249 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2250 rescan, 64); 2251 2252 /* btrfs_qgroup_info_item */ 2253 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2254 generation, 64); 2255 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2256 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2257 rfer_cmpr, 64); 2258 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2259 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2260 excl_cmpr, 64); 2261 2262 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2263 struct btrfs_qgroup_info_item, generation, 64); 2264 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2265 rfer, 64); 2266 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2267 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2268 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2269 excl, 64); 2270 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2271 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2272 2273 /* btrfs_qgroup_limit_item */ 2274 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2275 flags, 64); 2276 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2277 max_rfer, 64); 2278 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2279 max_excl, 64); 2280 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2281 rsv_rfer, 64); 2282 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2283 rsv_excl, 64); 2284 2285 /* btrfs_dev_replace_item */ 2286 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2287 struct btrfs_dev_replace_item, src_devid, 64); 2288 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2289 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2290 64); 2291 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2292 replace_state, 64); 2293 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2294 time_started, 64); 2295 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2296 time_stopped, 64); 2297 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2298 num_write_errors, 64); 2299 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2300 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2301 64); 2302 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2303 cursor_left, 64); 2304 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2305 cursor_right, 64); 2306 2307 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2308 struct btrfs_dev_replace_item, src_devid, 64); 2309 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2310 struct btrfs_dev_replace_item, 2311 cont_reading_from_srcdev_mode, 64); 2312 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2313 struct btrfs_dev_replace_item, replace_state, 64); 2314 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2315 struct btrfs_dev_replace_item, time_started, 64); 2316 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2317 struct btrfs_dev_replace_item, time_stopped, 64); 2318 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2319 struct btrfs_dev_replace_item, num_write_errors, 64); 2320 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2321 struct btrfs_dev_replace_item, 2322 num_uncorrectable_read_errors, 64); 2323 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2324 struct btrfs_dev_replace_item, cursor_left, 64); 2325 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2326 struct btrfs_dev_replace_item, cursor_right, 64); 2327 2328 /* helper function to cast into the data area of the leaf. */ 2329 #define btrfs_item_ptr(leaf, slot, type) \ 2330 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2331 btrfs_item_offset_nr(leaf, slot))) 2332 2333 #define btrfs_item_ptr_offset(leaf, slot) \ 2334 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2335 btrfs_item_offset_nr(leaf, slot))) 2336 2337 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2338 { 2339 return crc32c(crc, address, length); 2340 } 2341 2342 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2343 { 2344 put_unaligned_le32(~crc, result); 2345 } 2346 2347 static inline u64 btrfs_name_hash(const char *name, int len) 2348 { 2349 return crc32c((u32)~1, name, len); 2350 } 2351 2352 /* 2353 * Figure the key offset of an extended inode ref 2354 */ 2355 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2356 int len) 2357 { 2358 return (u64) crc32c(parent_objectid, name, len); 2359 } 2360 2361 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2362 { 2363 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2364 } 2365 2366 /* extent-tree.c */ 2367 2368 enum btrfs_inline_ref_type { 2369 BTRFS_REF_TYPE_INVALID, 2370 BTRFS_REF_TYPE_BLOCK, 2371 BTRFS_REF_TYPE_DATA, 2372 BTRFS_REF_TYPE_ANY, 2373 }; 2374 2375 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2376 struct btrfs_extent_inline_ref *iref, 2377 enum btrfs_inline_ref_type is_data); 2378 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2379 2380 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2381 2382 /* 2383 * Use this if we would be adding new items, as we could split nodes as we cow 2384 * down the tree. 2385 */ 2386 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2387 unsigned num_items) 2388 { 2389 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2390 } 2391 2392 /* 2393 * Doing a truncate or a modification won't result in new nodes or leaves, just 2394 * what we need for COW. 2395 */ 2396 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2397 unsigned num_items) 2398 { 2399 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2400 } 2401 2402 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2403 u64 start, u64 num_bytes); 2404 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2405 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2406 unsigned long count); 2407 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2408 struct btrfs_delayed_ref_root *delayed_refs, 2409 struct btrfs_delayed_ref_head *head); 2410 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2411 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2412 struct btrfs_fs_info *fs_info, u64 bytenr, 2413 u64 offset, int metadata, u64 *refs, u64 *flags); 2414 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2415 u64 bytenr, u64 num, int reserved); 2416 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2417 u64 bytenr, u64 num_bytes); 2418 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2419 int btrfs_cross_ref_exist(struct btrfs_root *root, 2420 u64 objectid, u64 offset, u64 bytenr); 2421 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2422 struct btrfs_root *root, 2423 u64 parent, u64 root_objectid, 2424 const struct btrfs_disk_key *key, 2425 int level, u64 hint, 2426 u64 empty_size); 2427 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2428 struct btrfs_root *root, 2429 struct extent_buffer *buf, 2430 u64 parent, int last_ref); 2431 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2432 struct btrfs_root *root, u64 owner, 2433 u64 offset, u64 ram_bytes, 2434 struct btrfs_key *ins); 2435 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2436 u64 root_objectid, u64 owner, u64 offset, 2437 struct btrfs_key *ins); 2438 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2439 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2440 struct btrfs_key *ins, int is_data, int delalloc); 2441 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2442 struct extent_buffer *buf, int full_backref); 2443 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2444 struct extent_buffer *buf, int full_backref); 2445 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2446 u64 bytenr, u64 num_bytes, u64 flags, 2447 int level, int is_data); 2448 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2449 2450 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2451 u64 start, u64 len, int delalloc); 2452 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2453 u64 start, u64 len); 2454 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2455 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2456 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2457 struct btrfs_ref *generic_ref); 2458 2459 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2460 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache); 2461 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache); 2462 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2463 2464 enum btrfs_reserve_flush_enum { 2465 /* If we are in the transaction, we can't flush anything.*/ 2466 BTRFS_RESERVE_NO_FLUSH, 2467 /* 2468 * Flushing delalloc may cause deadlock somewhere, in this 2469 * case, use FLUSH LIMIT 2470 */ 2471 BTRFS_RESERVE_FLUSH_LIMIT, 2472 BTRFS_RESERVE_FLUSH_EVICT, 2473 BTRFS_RESERVE_FLUSH_ALL, 2474 }; 2475 2476 enum btrfs_flush_state { 2477 FLUSH_DELAYED_ITEMS_NR = 1, 2478 FLUSH_DELAYED_ITEMS = 2, 2479 FLUSH_DELAYED_REFS_NR = 3, 2480 FLUSH_DELAYED_REFS = 4, 2481 FLUSH_DELALLOC = 5, 2482 FLUSH_DELALLOC_WAIT = 6, 2483 ALLOC_CHUNK = 7, 2484 ALLOC_CHUNK_FORCE = 8, 2485 RUN_DELAYED_IPUTS = 9, 2486 COMMIT_TRANS = 10, 2487 }; 2488 2489 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2490 struct btrfs_block_rsv *rsv, 2491 int nitems, bool use_global_rsv); 2492 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2493 struct btrfs_block_rsv *rsv); 2494 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2495 2496 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2497 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2498 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2499 u64 start, u64 end); 2500 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2501 u64 num_bytes, u64 *actual_bytes); 2502 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2503 2504 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2505 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2506 struct btrfs_fs_info *fs_info); 2507 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2508 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2509 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2510 2511 /* ctree.c */ 2512 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2513 int level, int *slot); 2514 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2515 int btrfs_previous_item(struct btrfs_root *root, 2516 struct btrfs_path *path, u64 min_objectid, 2517 int type); 2518 int btrfs_previous_extent_item(struct btrfs_root *root, 2519 struct btrfs_path *path, u64 min_objectid); 2520 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2521 struct btrfs_path *path, 2522 const struct btrfs_key *new_key); 2523 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2524 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2525 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2526 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2527 struct btrfs_key *key, int lowest_level, 2528 u64 min_trans); 2529 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2530 struct btrfs_path *path, 2531 u64 min_trans); 2532 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2533 int slot); 2534 2535 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2536 struct btrfs_root *root, struct extent_buffer *buf, 2537 struct extent_buffer *parent, int parent_slot, 2538 struct extent_buffer **cow_ret); 2539 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2540 struct btrfs_root *root, 2541 struct extent_buffer *buf, 2542 struct extent_buffer **cow_ret, u64 new_root_objectid); 2543 int btrfs_block_can_be_shared(struct btrfs_root *root, 2544 struct extent_buffer *buf); 2545 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2546 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2547 int btrfs_split_item(struct btrfs_trans_handle *trans, 2548 struct btrfs_root *root, 2549 struct btrfs_path *path, 2550 const struct btrfs_key *new_key, 2551 unsigned long split_offset); 2552 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2553 struct btrfs_root *root, 2554 struct btrfs_path *path, 2555 const struct btrfs_key *new_key); 2556 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2557 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2558 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2559 const struct btrfs_key *key, struct btrfs_path *p, 2560 int ins_len, int cow); 2561 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2562 struct btrfs_path *p, u64 time_seq); 2563 int btrfs_search_slot_for_read(struct btrfs_root *root, 2564 const struct btrfs_key *key, 2565 struct btrfs_path *p, int find_higher, 2566 int return_any); 2567 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2568 struct btrfs_root *root, struct extent_buffer *parent, 2569 int start_slot, u64 *last_ret, 2570 struct btrfs_key *progress); 2571 void btrfs_release_path(struct btrfs_path *p); 2572 struct btrfs_path *btrfs_alloc_path(void); 2573 void btrfs_free_path(struct btrfs_path *p); 2574 2575 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2576 struct btrfs_path *path, int slot, int nr); 2577 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2578 struct btrfs_root *root, 2579 struct btrfs_path *path) 2580 { 2581 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2582 } 2583 2584 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2585 const struct btrfs_key *cpu_key, u32 *data_size, 2586 u32 total_data, u32 total_size, int nr); 2587 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2588 const struct btrfs_key *key, void *data, u32 data_size); 2589 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2590 struct btrfs_root *root, 2591 struct btrfs_path *path, 2592 const struct btrfs_key *cpu_key, u32 *data_size, 2593 int nr); 2594 2595 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2596 struct btrfs_root *root, 2597 struct btrfs_path *path, 2598 const struct btrfs_key *key, 2599 u32 data_size) 2600 { 2601 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2602 } 2603 2604 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2605 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2606 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2607 u64 time_seq); 2608 static inline int btrfs_next_old_item(struct btrfs_root *root, 2609 struct btrfs_path *p, u64 time_seq) 2610 { 2611 ++p->slots[0]; 2612 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2613 return btrfs_next_old_leaf(root, p, time_seq); 2614 return 0; 2615 } 2616 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2617 { 2618 return btrfs_next_old_item(root, p, 0); 2619 } 2620 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2621 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2622 struct btrfs_block_rsv *block_rsv, 2623 int update_ref, int for_reloc); 2624 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2625 struct btrfs_root *root, 2626 struct extent_buffer *node, 2627 struct extent_buffer *parent); 2628 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2629 { 2630 /* 2631 * Do it this way so we only ever do one test_bit in the normal case. 2632 */ 2633 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2634 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2635 return 2; 2636 return 1; 2637 } 2638 return 0; 2639 } 2640 2641 /* 2642 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2643 * anything except sleeping. This function is used to check the status of 2644 * the fs. 2645 */ 2646 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2647 { 2648 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2649 } 2650 2651 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2652 { 2653 kfree(fs_info->balance_ctl); 2654 kfree(fs_info->delayed_root); 2655 kfree(fs_info->extent_root); 2656 kfree(fs_info->tree_root); 2657 kfree(fs_info->chunk_root); 2658 kfree(fs_info->dev_root); 2659 kfree(fs_info->csum_root); 2660 kfree(fs_info->quota_root); 2661 kfree(fs_info->uuid_root); 2662 kfree(fs_info->free_space_root); 2663 kfree(fs_info->super_copy); 2664 kfree(fs_info->super_for_commit); 2665 kvfree(fs_info); 2666 } 2667 2668 /* tree mod log functions from ctree.c */ 2669 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2670 struct seq_list *elem); 2671 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2672 struct seq_list *elem); 2673 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2674 2675 /* root-item.c */ 2676 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2677 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2678 int name_len); 2679 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2680 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2681 int name_len); 2682 int btrfs_del_root(struct btrfs_trans_handle *trans, 2683 const struct btrfs_key *key); 2684 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2685 const struct btrfs_key *key, 2686 struct btrfs_root_item *item); 2687 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2688 struct btrfs_root *root, 2689 struct btrfs_key *key, 2690 struct btrfs_root_item *item); 2691 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2692 struct btrfs_path *path, struct btrfs_root_item *root_item, 2693 struct btrfs_key *root_key); 2694 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2695 void btrfs_set_root_node(struct btrfs_root_item *item, 2696 struct extent_buffer *node); 2697 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2698 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2699 struct btrfs_root *root); 2700 2701 /* uuid-tree.c */ 2702 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2703 u64 subid); 2704 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2705 u64 subid); 2706 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2707 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2708 u64)); 2709 2710 /* dir-item.c */ 2711 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2712 const char *name, int name_len); 2713 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2714 int name_len, struct btrfs_inode *dir, 2715 struct btrfs_key *location, u8 type, u64 index); 2716 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2717 struct btrfs_root *root, 2718 struct btrfs_path *path, u64 dir, 2719 const char *name, int name_len, 2720 int mod); 2721 struct btrfs_dir_item * 2722 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2723 struct btrfs_root *root, 2724 struct btrfs_path *path, u64 dir, 2725 u64 objectid, const char *name, int name_len, 2726 int mod); 2727 struct btrfs_dir_item * 2728 btrfs_search_dir_index_item(struct btrfs_root *root, 2729 struct btrfs_path *path, u64 dirid, 2730 const char *name, int name_len); 2731 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2732 struct btrfs_root *root, 2733 struct btrfs_path *path, 2734 struct btrfs_dir_item *di); 2735 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2736 struct btrfs_root *root, 2737 struct btrfs_path *path, u64 objectid, 2738 const char *name, u16 name_len, 2739 const void *data, u16 data_len); 2740 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2741 struct btrfs_root *root, 2742 struct btrfs_path *path, u64 dir, 2743 const char *name, u16 name_len, 2744 int mod); 2745 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2746 struct btrfs_path *path, 2747 const char *name, 2748 int name_len); 2749 2750 /* orphan.c */ 2751 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2752 struct btrfs_root *root, u64 offset); 2753 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2754 struct btrfs_root *root, u64 offset); 2755 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2756 2757 /* inode-item.c */ 2758 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2759 struct btrfs_root *root, 2760 const char *name, int name_len, 2761 u64 inode_objectid, u64 ref_objectid, u64 index); 2762 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2763 struct btrfs_root *root, 2764 const char *name, int name_len, 2765 u64 inode_objectid, u64 ref_objectid, u64 *index); 2766 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2767 struct btrfs_root *root, 2768 struct btrfs_path *path, u64 objectid); 2769 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2770 *root, struct btrfs_path *path, 2771 struct btrfs_key *location, int mod); 2772 2773 struct btrfs_inode_extref * 2774 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2775 struct btrfs_root *root, 2776 struct btrfs_path *path, 2777 const char *name, int name_len, 2778 u64 inode_objectid, u64 ref_objectid, int ins_len, 2779 int cow); 2780 2781 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2782 int slot, const char *name, 2783 int name_len); 2784 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2785 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2786 const char *name, int name_len); 2787 /* file-item.c */ 2788 struct btrfs_dio_private; 2789 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2790 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 2791 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2792 u8 *dst); 2793 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 2794 u64 logical_offset); 2795 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2796 struct btrfs_root *root, 2797 u64 objectid, u64 pos, 2798 u64 disk_offset, u64 disk_num_bytes, 2799 u64 num_bytes, u64 offset, u64 ram_bytes, 2800 u8 compression, u8 encryption, u16 other_encoding); 2801 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2802 struct btrfs_root *root, 2803 struct btrfs_path *path, u64 objectid, 2804 u64 bytenr, int mod); 2805 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2806 struct btrfs_root *root, 2807 struct btrfs_ordered_sum *sums); 2808 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 2809 u64 file_start, int contig); 2810 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2811 struct list_head *list, int search_commit); 2812 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2813 const struct btrfs_path *path, 2814 struct btrfs_file_extent_item *fi, 2815 const bool new_inline, 2816 struct extent_map *em); 2817 2818 /* inode.c */ 2819 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2820 u64 start, u64 len); 2821 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2822 u64 *orig_start, u64 *orig_block_len, 2823 u64 *ram_bytes); 2824 2825 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2826 struct btrfs_inode *inode); 2827 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2828 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2829 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2830 struct btrfs_root *root, 2831 struct btrfs_inode *dir, struct btrfs_inode *inode, 2832 const char *name, int name_len); 2833 int btrfs_add_link(struct btrfs_trans_handle *trans, 2834 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2835 const char *name, int name_len, int add_backref, u64 index); 2836 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2837 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2838 int front); 2839 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2840 struct btrfs_root *root, 2841 struct inode *inode, u64 new_size, 2842 u32 min_type); 2843 2844 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 2845 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 2846 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2847 unsigned int extra_bits, 2848 struct extent_state **cached_state); 2849 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2850 struct btrfs_root *new_root, 2851 struct btrfs_root *parent_root, 2852 u64 new_dirid); 2853 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 2854 unsigned *bits); 2855 void btrfs_clear_delalloc_extent(struct inode *inode, 2856 struct extent_state *state, unsigned *bits); 2857 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 2858 struct extent_state *other); 2859 void btrfs_split_delalloc_extent(struct inode *inode, 2860 struct extent_state *orig, u64 split); 2861 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 2862 unsigned long bio_flags); 2863 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 2864 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 2865 int btrfs_readpage(struct file *file, struct page *page); 2866 void btrfs_evict_inode(struct inode *inode); 2867 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2868 struct inode *btrfs_alloc_inode(struct super_block *sb); 2869 void btrfs_destroy_inode(struct inode *inode); 2870 void btrfs_free_inode(struct inode *inode); 2871 int btrfs_drop_inode(struct inode *inode); 2872 int __init btrfs_init_cachep(void); 2873 void __cold btrfs_destroy_cachep(void); 2874 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 2875 struct btrfs_root *root, struct btrfs_path *path); 2876 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2877 struct btrfs_root *root); 2878 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 2879 struct page *page, size_t pg_offset, 2880 u64 start, u64 end, int create); 2881 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2882 struct btrfs_root *root, 2883 struct inode *inode); 2884 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 2885 struct btrfs_root *root, struct inode *inode); 2886 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 2887 struct btrfs_inode *inode); 2888 int btrfs_orphan_cleanup(struct btrfs_root *root); 2889 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 2890 void btrfs_add_delayed_iput(struct inode *inode); 2891 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 2892 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 2893 int btrfs_prealloc_file_range(struct inode *inode, int mode, 2894 u64 start, u64 num_bytes, u64 min_size, 2895 loff_t actual_len, u64 *alloc_hint); 2896 int btrfs_prealloc_file_range_trans(struct inode *inode, 2897 struct btrfs_trans_handle *trans, int mode, 2898 u64 start, u64 num_bytes, u64 min_size, 2899 loff_t actual_len, u64 *alloc_hint); 2900 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 2901 u64 start, u64 end, int *page_started, unsigned long *nr_written, 2902 struct writeback_control *wbc); 2903 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 2904 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 2905 u64 end, int uptodate); 2906 extern const struct dentry_operations btrfs_dentry_operations; 2907 2908 /* ioctl.c */ 2909 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2910 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2911 int btrfs_ioctl_get_supported_features(void __user *arg); 2912 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 2913 int __pure btrfs_is_empty_uuid(u8 *uuid); 2914 int btrfs_defrag_file(struct inode *inode, struct file *file, 2915 struct btrfs_ioctl_defrag_range_args *range, 2916 u64 newer_than, unsigned long max_pages); 2917 void btrfs_get_block_group_info(struct list_head *groups_list, 2918 struct btrfs_ioctl_space_info *space); 2919 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 2920 struct btrfs_ioctl_balance_args *bargs); 2921 2922 /* file.c */ 2923 int __init btrfs_auto_defrag_init(void); 2924 void __cold btrfs_auto_defrag_exit(void); 2925 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 2926 struct btrfs_inode *inode); 2927 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 2928 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 2929 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 2930 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 2931 int skip_pinned); 2932 extern const struct file_operations btrfs_file_operations; 2933 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 2934 struct btrfs_root *root, struct inode *inode, 2935 struct btrfs_path *path, u64 start, u64 end, 2936 u64 *drop_end, int drop_cache, 2937 int replace_extent, 2938 u32 extent_item_size, 2939 int *key_inserted); 2940 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 2941 struct btrfs_root *root, struct inode *inode, u64 start, 2942 u64 end, int drop_cache); 2943 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, 2944 const u64 start, const u64 end, 2945 struct btrfs_clone_extent_info *clone_info, 2946 struct btrfs_trans_handle **trans_out); 2947 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2948 struct btrfs_inode *inode, u64 start, u64 end); 2949 int btrfs_release_file(struct inode *inode, struct file *file); 2950 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 2951 size_t num_pages, loff_t pos, size_t write_bytes, 2952 struct extent_state **cached); 2953 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 2954 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 2955 struct file *file_out, loff_t pos_out, 2956 loff_t len, unsigned int remap_flags); 2957 2958 /* tree-defrag.c */ 2959 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2960 struct btrfs_root *root); 2961 2962 /* super.c */ 2963 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 2964 unsigned long new_flags); 2965 int btrfs_sync_fs(struct super_block *sb, int wait); 2966 2967 static inline __printf(2, 3) __cold 2968 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 2969 { 2970 } 2971 2972 #ifdef CONFIG_PRINTK 2973 __printf(2, 3) 2974 __cold 2975 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 2976 #else 2977 #define btrfs_printk(fs_info, fmt, args...) \ 2978 btrfs_no_printk(fs_info, fmt, ##args) 2979 #endif 2980 2981 #define btrfs_emerg(fs_info, fmt, args...) \ 2982 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 2983 #define btrfs_alert(fs_info, fmt, args...) \ 2984 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 2985 #define btrfs_crit(fs_info, fmt, args...) \ 2986 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 2987 #define btrfs_err(fs_info, fmt, args...) \ 2988 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 2989 #define btrfs_warn(fs_info, fmt, args...) \ 2990 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 2991 #define btrfs_notice(fs_info, fmt, args...) \ 2992 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 2993 #define btrfs_info(fs_info, fmt, args...) \ 2994 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 2995 2996 /* 2997 * Wrappers that use printk_in_rcu 2998 */ 2999 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3000 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3001 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3002 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3003 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3004 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3005 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3006 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3007 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3008 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3009 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3010 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3011 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3012 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3013 3014 /* 3015 * Wrappers that use a ratelimited printk_in_rcu 3016 */ 3017 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3018 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3019 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3020 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3021 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3022 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3023 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3024 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3025 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3026 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3027 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3028 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3029 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3030 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3031 3032 /* 3033 * Wrappers that use a ratelimited printk 3034 */ 3035 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3036 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3037 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3038 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3039 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3040 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3041 #define btrfs_err_rl(fs_info, fmt, args...) \ 3042 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3043 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3044 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3045 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3046 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3047 #define btrfs_info_rl(fs_info, fmt, args...) \ 3048 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3049 3050 #if defined(CONFIG_DYNAMIC_DEBUG) 3051 #define btrfs_debug(fs_info, fmt, args...) \ 3052 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3053 fs_info, KERN_DEBUG fmt, ##args) 3054 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3055 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3056 fs_info, KERN_DEBUG fmt, ##args) 3057 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3058 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3059 fs_info, KERN_DEBUG fmt, ##args) 3060 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3061 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3062 fs_info, KERN_DEBUG fmt, ##args) 3063 #elif defined(DEBUG) 3064 #define btrfs_debug(fs_info, fmt, args...) \ 3065 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3066 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3067 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3068 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3069 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3070 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3071 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3072 #else 3073 #define btrfs_debug(fs_info, fmt, args...) \ 3074 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3075 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3076 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3077 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3078 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3079 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3080 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3081 #endif 3082 3083 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3084 do { \ 3085 rcu_read_lock(); \ 3086 btrfs_printk(fs_info, fmt, ##args); \ 3087 rcu_read_unlock(); \ 3088 } while (0) 3089 3090 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3091 do { \ 3092 rcu_read_lock(); \ 3093 btrfs_no_printk(fs_info, fmt, ##args); \ 3094 rcu_read_unlock(); \ 3095 } while (0) 3096 3097 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3098 do { \ 3099 static DEFINE_RATELIMIT_STATE(_rs, \ 3100 DEFAULT_RATELIMIT_INTERVAL, \ 3101 DEFAULT_RATELIMIT_BURST); \ 3102 if (__ratelimit(&_rs)) \ 3103 btrfs_printk(fs_info, fmt, ##args); \ 3104 } while (0) 3105 3106 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3107 do { \ 3108 rcu_read_lock(); \ 3109 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3110 rcu_read_unlock(); \ 3111 } while (0) 3112 3113 __cold 3114 static inline void assfail(const char *expr, const char *file, int line) 3115 { 3116 if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { 3117 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3118 BUG(); 3119 } 3120 } 3121 3122 #define ASSERT(expr) \ 3123 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3124 3125 /* 3126 * Use that for functions that are conditionally exported for sanity tests but 3127 * otherwise static 3128 */ 3129 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3130 #define EXPORT_FOR_TESTS static 3131 #else 3132 #define EXPORT_FOR_TESTS 3133 #endif 3134 3135 __cold 3136 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3137 { 3138 btrfs_err(fs_info, 3139 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3140 } 3141 3142 __printf(5, 6) 3143 __cold 3144 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3145 unsigned int line, int errno, const char *fmt, ...); 3146 3147 const char * __attribute_const__ btrfs_decode_error(int errno); 3148 3149 __cold 3150 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3151 const char *function, 3152 unsigned int line, int errno); 3153 3154 /* 3155 * Call btrfs_abort_transaction as early as possible when an error condition is 3156 * detected, that way the exact line number is reported. 3157 */ 3158 #define btrfs_abort_transaction(trans, errno) \ 3159 do { \ 3160 /* Report first abort since mount */ \ 3161 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3162 &((trans)->fs_info->fs_state))) { \ 3163 if ((errno) != -EIO) { \ 3164 WARN(1, KERN_DEBUG \ 3165 "BTRFS: Transaction aborted (error %d)\n", \ 3166 (errno)); \ 3167 } else { \ 3168 btrfs_debug((trans)->fs_info, \ 3169 "Transaction aborted (error %d)", \ 3170 (errno)); \ 3171 } \ 3172 } \ 3173 __btrfs_abort_transaction((trans), __func__, \ 3174 __LINE__, (errno)); \ 3175 } while (0) 3176 3177 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3178 do { \ 3179 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3180 (errno), fmt, ##args); \ 3181 } while (0) 3182 3183 __printf(5, 6) 3184 __cold 3185 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3186 unsigned int line, int errno, const char *fmt, ...); 3187 /* 3188 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3189 * will panic(). Otherwise we BUG() here. 3190 */ 3191 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3192 do { \ 3193 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3194 BUG(); \ 3195 } while (0) 3196 3197 3198 /* compatibility and incompatibility defines */ 3199 3200 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3201 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3202 #opt) 3203 3204 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3205 u64 flag, const char* name) 3206 { 3207 struct btrfs_super_block *disk_super; 3208 u64 features; 3209 3210 disk_super = fs_info->super_copy; 3211 features = btrfs_super_incompat_flags(disk_super); 3212 if (!(features & flag)) { 3213 spin_lock(&fs_info->super_lock); 3214 features = btrfs_super_incompat_flags(disk_super); 3215 if (!(features & flag)) { 3216 features |= flag; 3217 btrfs_set_super_incompat_flags(disk_super, features); 3218 btrfs_info(fs_info, 3219 "setting incompat feature flag for %s (0x%llx)", 3220 name, flag); 3221 } 3222 spin_unlock(&fs_info->super_lock); 3223 } 3224 } 3225 3226 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3227 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3228 #opt) 3229 3230 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3231 u64 flag, const char* name) 3232 { 3233 struct btrfs_super_block *disk_super; 3234 u64 features; 3235 3236 disk_super = fs_info->super_copy; 3237 features = btrfs_super_incompat_flags(disk_super); 3238 if (features & flag) { 3239 spin_lock(&fs_info->super_lock); 3240 features = btrfs_super_incompat_flags(disk_super); 3241 if (features & flag) { 3242 features &= ~flag; 3243 btrfs_set_super_incompat_flags(disk_super, features); 3244 btrfs_info(fs_info, 3245 "clearing incompat feature flag for %s (0x%llx)", 3246 name, flag); 3247 } 3248 spin_unlock(&fs_info->super_lock); 3249 } 3250 } 3251 3252 #define btrfs_fs_incompat(fs_info, opt) \ 3253 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3254 3255 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3256 { 3257 struct btrfs_super_block *disk_super; 3258 disk_super = fs_info->super_copy; 3259 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3260 } 3261 3262 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3263 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3264 #opt) 3265 3266 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3267 u64 flag, const char *name) 3268 { 3269 struct btrfs_super_block *disk_super; 3270 u64 features; 3271 3272 disk_super = fs_info->super_copy; 3273 features = btrfs_super_compat_ro_flags(disk_super); 3274 if (!(features & flag)) { 3275 spin_lock(&fs_info->super_lock); 3276 features = btrfs_super_compat_ro_flags(disk_super); 3277 if (!(features & flag)) { 3278 features |= flag; 3279 btrfs_set_super_compat_ro_flags(disk_super, features); 3280 btrfs_info(fs_info, 3281 "setting compat-ro feature flag for %s (0x%llx)", 3282 name, flag); 3283 } 3284 spin_unlock(&fs_info->super_lock); 3285 } 3286 } 3287 3288 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3289 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3290 #opt) 3291 3292 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3293 u64 flag, const char *name) 3294 { 3295 struct btrfs_super_block *disk_super; 3296 u64 features; 3297 3298 disk_super = fs_info->super_copy; 3299 features = btrfs_super_compat_ro_flags(disk_super); 3300 if (features & flag) { 3301 spin_lock(&fs_info->super_lock); 3302 features = btrfs_super_compat_ro_flags(disk_super); 3303 if (features & flag) { 3304 features &= ~flag; 3305 btrfs_set_super_compat_ro_flags(disk_super, features); 3306 btrfs_info(fs_info, 3307 "clearing compat-ro feature flag for %s (0x%llx)", 3308 name, flag); 3309 } 3310 spin_unlock(&fs_info->super_lock); 3311 } 3312 } 3313 3314 #define btrfs_fs_compat_ro(fs_info, opt) \ 3315 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3316 3317 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3318 { 3319 struct btrfs_super_block *disk_super; 3320 disk_super = fs_info->super_copy; 3321 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3322 } 3323 3324 /* acl.c */ 3325 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3326 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3327 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3328 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3329 struct inode *inode, struct inode *dir); 3330 #else 3331 #define btrfs_get_acl NULL 3332 #define btrfs_set_acl NULL 3333 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3334 struct inode *inode, struct inode *dir) 3335 { 3336 return 0; 3337 } 3338 #endif 3339 3340 /* relocation.c */ 3341 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3342 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3343 struct btrfs_root *root); 3344 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3345 struct btrfs_root *root); 3346 int btrfs_recover_relocation(struct btrfs_root *root); 3347 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3348 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3349 struct btrfs_root *root, struct extent_buffer *buf, 3350 struct extent_buffer *cow); 3351 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3352 u64 *bytes_to_reserve); 3353 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3354 struct btrfs_pending_snapshot *pending); 3355 3356 /* scrub.c */ 3357 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3358 u64 end, struct btrfs_scrub_progress *progress, 3359 int readonly, int is_dev_replace); 3360 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3361 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3362 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3363 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3364 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3365 struct btrfs_scrub_progress *progress); 3366 static inline void btrfs_init_full_stripe_locks_tree( 3367 struct btrfs_full_stripe_locks_tree *locks_root) 3368 { 3369 locks_root->root = RB_ROOT; 3370 mutex_init(&locks_root->lock); 3371 } 3372 3373 /* dev-replace.c */ 3374 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3375 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3376 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3377 3378 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3379 { 3380 btrfs_bio_counter_sub(fs_info, 1); 3381 } 3382 3383 /* reada.c */ 3384 struct reada_control { 3385 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3386 struct btrfs_key key_start; 3387 struct btrfs_key key_end; /* exclusive */ 3388 atomic_t elems; 3389 struct kref refcnt; 3390 wait_queue_head_t wait; 3391 }; 3392 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3393 struct btrfs_key *start, struct btrfs_key *end); 3394 int btrfs_reada_wait(void *handle); 3395 void btrfs_reada_detach(void *handle); 3396 int btree_readahead_hook(struct extent_buffer *eb, int err); 3397 3398 static inline int is_fstree(u64 rootid) 3399 { 3400 if (rootid == BTRFS_FS_TREE_OBJECTID || 3401 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3402 !btrfs_qgroup_level(rootid))) 3403 return 1; 3404 return 0; 3405 } 3406 3407 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3408 { 3409 return signal_pending(current); 3410 } 3411 3412 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3413 3414 /* Sanity test specific functions */ 3415 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3416 void btrfs_test_inode_set_ops(struct inode *inode); 3417 void btrfs_test_destroy_inode(struct inode *inode); 3418 3419 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3420 { 3421 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3422 } 3423 #else 3424 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3425 { 3426 return 0; 3427 } 3428 #endif 3429 3430 #endif 3431