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