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