1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <trace/events/btrfs.h> 20 #include <asm/kmap_types.h> 21 #include <asm/unaligned.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent-io-tree.h" 32 #include "extent_io.h" 33 #include "extent_map.h" 34 #include "async-thread.h" 35 #include "block-rsv.h" 36 37 struct btrfs_trans_handle; 38 struct btrfs_transaction; 39 struct btrfs_pending_snapshot; 40 struct btrfs_delayed_ref_root; 41 struct btrfs_space_info; 42 struct btrfs_block_group; 43 extern struct kmem_cache *btrfs_trans_handle_cachep; 44 extern struct kmem_cache *btrfs_bit_radix_cachep; 45 extern struct kmem_cache *btrfs_path_cachep; 46 extern struct kmem_cache *btrfs_free_space_cachep; 47 extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 48 struct btrfs_ordered_sum; 49 struct btrfs_ref; 50 51 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 52 53 /* 54 * Maximum number of mirrors that can be available for all profiles counting 55 * the target device of dev-replace as one. During an active device replace 56 * procedure, the target device of the copy operation is a mirror for the 57 * filesystem data as well that can be used to read data in order to repair 58 * read errors on other disks. 59 * 60 * Current value is derived from RAID1C4 with 4 copies. 61 */ 62 #define BTRFS_MAX_MIRRORS (4 + 1) 63 64 #define BTRFS_MAX_LEVEL 8 65 66 #define BTRFS_OLDEST_GENERATION 0ULL 67 68 /* 69 * the max metadata block size. This limit is somewhat artificial, 70 * but the memmove costs go through the roof for larger blocks. 71 */ 72 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 73 74 /* 75 * we can actually store much bigger names, but lets not confuse the rest 76 * of linux 77 */ 78 #define BTRFS_NAME_LEN 255 79 80 /* 81 * Theoretical limit is larger, but we keep this down to a sane 82 * value. That should limit greatly the possibility of collisions on 83 * inode ref items. 84 */ 85 #define BTRFS_LINK_MAX 65535U 86 87 #define BTRFS_EMPTY_DIR_SIZE 0 88 89 /* ioprio of readahead is set to idle */ 90 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 91 92 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 93 94 /* 95 * Use large batch size to reduce overhead of metadata updates. On the reader 96 * side, we only read it when we are close to ENOSPC and the read overhead is 97 * mostly related to the number of CPUs, so it is OK to use arbitrary large 98 * value here. 99 */ 100 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 101 102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 103 104 /* 105 * Deltas are an effective way to populate global statistics. Give macro names 106 * to make it clear what we're doing. An example is discard_extents in 107 * btrfs_free_space_ctl. 108 */ 109 #define BTRFS_STAT_NR_ENTRIES 2 110 #define BTRFS_STAT_CURR 0 111 #define BTRFS_STAT_PREV 1 112 113 /* 114 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 115 */ 116 static inline u32 count_max_extents(u64 size) 117 { 118 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 119 } 120 121 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 122 { 123 BUG_ON(num_stripes == 0); 124 return sizeof(struct btrfs_chunk) + 125 sizeof(struct btrfs_stripe) * (num_stripes - 1); 126 } 127 128 /* 129 * Runtime (in-memory) states of filesystem 130 */ 131 enum { 132 /* Global indicator of serious filesystem errors */ 133 BTRFS_FS_STATE_ERROR, 134 /* 135 * Filesystem is being remounted, allow to skip some operations, like 136 * defrag 137 */ 138 BTRFS_FS_STATE_REMOUNTING, 139 /* Track if a transaction abort has been reported on this filesystem */ 140 BTRFS_FS_STATE_TRANS_ABORTED, 141 /* 142 * Bio operations should be blocked on this filesystem because a source 143 * or target device is being destroyed as part of a device replace 144 */ 145 BTRFS_FS_STATE_DEV_REPLACING, 146 /* The btrfs_fs_info created for self-tests */ 147 BTRFS_FS_STATE_DUMMY_FS_INFO, 148 }; 149 150 #define BTRFS_BACKREF_REV_MAX 256 151 #define BTRFS_BACKREF_REV_SHIFT 56 152 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 153 BTRFS_BACKREF_REV_SHIFT) 154 155 #define BTRFS_OLD_BACKREF_REV 0 156 #define BTRFS_MIXED_BACKREF_REV 1 157 158 /* 159 * every tree block (leaf or node) starts with this header. 160 */ 161 struct btrfs_header { 162 /* these first four must match the super block */ 163 u8 csum[BTRFS_CSUM_SIZE]; 164 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 165 __le64 bytenr; /* which block this node is supposed to live in */ 166 __le64 flags; 167 168 /* allowed to be different from the super from here on down */ 169 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 170 __le64 generation; 171 __le64 owner; 172 __le32 nritems; 173 u8 level; 174 } __attribute__ ((__packed__)); 175 176 /* 177 * this is a very generous portion of the super block, giving us 178 * room to translate 14 chunks with 3 stripes each. 179 */ 180 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 181 182 /* 183 * just in case we somehow lose the roots and are not able to mount, 184 * we store an array of the roots from previous transactions 185 * in the super. 186 */ 187 #define BTRFS_NUM_BACKUP_ROOTS 4 188 struct btrfs_root_backup { 189 __le64 tree_root; 190 __le64 tree_root_gen; 191 192 __le64 chunk_root; 193 __le64 chunk_root_gen; 194 195 __le64 extent_root; 196 __le64 extent_root_gen; 197 198 __le64 fs_root; 199 __le64 fs_root_gen; 200 201 __le64 dev_root; 202 __le64 dev_root_gen; 203 204 __le64 csum_root; 205 __le64 csum_root_gen; 206 207 __le64 total_bytes; 208 __le64 bytes_used; 209 __le64 num_devices; 210 /* future */ 211 __le64 unused_64[4]; 212 213 u8 tree_root_level; 214 u8 chunk_root_level; 215 u8 extent_root_level; 216 u8 fs_root_level; 217 u8 dev_root_level; 218 u8 csum_root_level; 219 /* future and to align */ 220 u8 unused_8[10]; 221 } __attribute__ ((__packed__)); 222 223 /* 224 * the super block basically lists the main trees of the FS 225 * it currently lacks any block count etc etc 226 */ 227 struct btrfs_super_block { 228 /* the first 4 fields must match struct btrfs_header */ 229 u8 csum[BTRFS_CSUM_SIZE]; 230 /* FS specific UUID, visible to user */ 231 u8 fsid[BTRFS_FSID_SIZE]; 232 __le64 bytenr; /* this block number */ 233 __le64 flags; 234 235 /* allowed to be different from the btrfs_header from here own down */ 236 __le64 magic; 237 __le64 generation; 238 __le64 root; 239 __le64 chunk_root; 240 __le64 log_root; 241 242 /* this will help find the new super based on the log root */ 243 __le64 log_root_transid; 244 __le64 total_bytes; 245 __le64 bytes_used; 246 __le64 root_dir_objectid; 247 __le64 num_devices; 248 __le32 sectorsize; 249 __le32 nodesize; 250 __le32 __unused_leafsize; 251 __le32 stripesize; 252 __le32 sys_chunk_array_size; 253 __le64 chunk_root_generation; 254 __le64 compat_flags; 255 __le64 compat_ro_flags; 256 __le64 incompat_flags; 257 __le16 csum_type; 258 u8 root_level; 259 u8 chunk_root_level; 260 u8 log_root_level; 261 struct btrfs_dev_item dev_item; 262 263 char label[BTRFS_LABEL_SIZE]; 264 265 __le64 cache_generation; 266 __le64 uuid_tree_generation; 267 268 /* the UUID written into btree blocks */ 269 u8 metadata_uuid[BTRFS_FSID_SIZE]; 270 271 /* future expansion */ 272 __le64 reserved[28]; 273 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 274 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 275 } __attribute__ ((__packed__)); 276 277 /* 278 * Compat flags that we support. If any incompat flags are set other than the 279 * ones specified below then we will fail to mount 280 */ 281 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 282 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 283 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 284 285 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 286 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 287 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 288 289 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 291 292 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 293 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 294 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 295 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 296 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 297 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 298 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 299 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 300 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 301 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 302 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 303 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 304 BTRFS_FEATURE_INCOMPAT_RAID1C34) 305 306 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 307 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 308 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 309 310 /* 311 * A leaf is full of items. offset and size tell us where to find 312 * the item in the leaf (relative to the start of the data area) 313 */ 314 struct btrfs_item { 315 struct btrfs_disk_key key; 316 __le32 offset; 317 __le32 size; 318 } __attribute__ ((__packed__)); 319 320 /* 321 * leaves have an item area and a data area: 322 * [item0, item1....itemN] [free space] [dataN...data1, data0] 323 * 324 * The data is separate from the items to get the keys closer together 325 * during searches. 326 */ 327 struct btrfs_leaf { 328 struct btrfs_header header; 329 struct btrfs_item items[]; 330 } __attribute__ ((__packed__)); 331 332 /* 333 * all non-leaf blocks are nodes, they hold only keys and pointers to 334 * other blocks 335 */ 336 struct btrfs_key_ptr { 337 struct btrfs_disk_key key; 338 __le64 blockptr; 339 __le64 generation; 340 } __attribute__ ((__packed__)); 341 342 struct btrfs_node { 343 struct btrfs_header header; 344 struct btrfs_key_ptr ptrs[]; 345 } __attribute__ ((__packed__)); 346 347 /* 348 * btrfs_paths remember the path taken from the root down to the leaf. 349 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 350 * to any other levels that are present. 351 * 352 * The slots array records the index of the item or block pointer 353 * used while walking the tree. 354 */ 355 enum { READA_NONE, READA_BACK, READA_FORWARD }; 356 struct btrfs_path { 357 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 358 int slots[BTRFS_MAX_LEVEL]; 359 /* if there is real range locking, this locks field will change */ 360 u8 locks[BTRFS_MAX_LEVEL]; 361 u8 reada; 362 /* keep some upper locks as we walk down */ 363 u8 lowest_level; 364 365 /* 366 * set by btrfs_split_item, tells search_slot to keep all locks 367 * and to force calls to keep space in the nodes 368 */ 369 unsigned int search_for_split:1; 370 unsigned int keep_locks:1; 371 unsigned int skip_locking:1; 372 unsigned int leave_spinning:1; 373 unsigned int search_commit_root:1; 374 unsigned int need_commit_sem:1; 375 unsigned int skip_release_on_error:1; 376 }; 377 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 378 sizeof(struct btrfs_item)) 379 struct btrfs_dev_replace { 380 u64 replace_state; /* see #define above */ 381 time64_t time_started; /* seconds since 1-Jan-1970 */ 382 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 383 atomic64_t num_write_errors; 384 atomic64_t num_uncorrectable_read_errors; 385 386 u64 cursor_left; 387 u64 committed_cursor_left; 388 u64 cursor_left_last_write_of_item; 389 u64 cursor_right; 390 391 u64 cont_reading_from_srcdev_mode; /* see #define above */ 392 393 int is_valid; 394 int item_needs_writeback; 395 struct btrfs_device *srcdev; 396 struct btrfs_device *tgtdev; 397 398 struct mutex lock_finishing_cancel_unmount; 399 struct rw_semaphore rwsem; 400 401 struct btrfs_scrub_progress scrub_progress; 402 403 struct percpu_counter bio_counter; 404 wait_queue_head_t replace_wait; 405 }; 406 407 /* 408 * free clusters are used to claim free space in relatively large chunks, 409 * allowing us to do less seeky writes. They are used for all metadata 410 * allocations. In ssd_spread mode they are also used for data allocations. 411 */ 412 struct btrfs_free_cluster { 413 spinlock_t lock; 414 spinlock_t refill_lock; 415 struct rb_root root; 416 417 /* largest extent in this cluster */ 418 u64 max_size; 419 420 /* first extent starting offset */ 421 u64 window_start; 422 423 /* We did a full search and couldn't create a cluster */ 424 bool fragmented; 425 426 struct btrfs_block_group *block_group; 427 /* 428 * when a cluster is allocated from a block group, we put the 429 * cluster onto a list in the block group so that it can 430 * be freed before the block group is freed. 431 */ 432 struct list_head block_group_list; 433 }; 434 435 enum btrfs_caching_type { 436 BTRFS_CACHE_NO, 437 BTRFS_CACHE_STARTED, 438 BTRFS_CACHE_FAST, 439 BTRFS_CACHE_FINISHED, 440 BTRFS_CACHE_ERROR, 441 }; 442 443 /* 444 * Tree to record all locked full stripes of a RAID5/6 block group 445 */ 446 struct btrfs_full_stripe_locks_tree { 447 struct rb_root root; 448 struct mutex lock; 449 }; 450 451 /* Discard control. */ 452 /* 453 * Async discard uses multiple lists to differentiate the discard filter 454 * parameters. Index 0 is for completely free block groups where we need to 455 * ensure the entire block group is trimmed without being lossy. Indices 456 * afterwards represent monotonically decreasing discard filter sizes to 457 * prioritize what should be discarded next. 458 */ 459 #define BTRFS_NR_DISCARD_LISTS 3 460 #define BTRFS_DISCARD_INDEX_UNUSED 0 461 #define BTRFS_DISCARD_INDEX_START 1 462 463 struct btrfs_discard_ctl { 464 struct workqueue_struct *discard_workers; 465 struct delayed_work work; 466 spinlock_t lock; 467 struct btrfs_block_group *block_group; 468 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 469 u64 prev_discard; 470 atomic_t discardable_extents; 471 atomic64_t discardable_bytes; 472 u64 max_discard_size; 473 unsigned long delay; 474 u32 iops_limit; 475 u32 kbps_limit; 476 u64 discard_extent_bytes; 477 u64 discard_bitmap_bytes; 478 atomic64_t discard_bytes_saved; 479 }; 480 481 /* delayed seq elem */ 482 struct seq_list { 483 struct list_head list; 484 u64 seq; 485 }; 486 487 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 488 489 #define SEQ_LAST ((u64)-1) 490 491 enum btrfs_orphan_cleanup_state { 492 ORPHAN_CLEANUP_STARTED = 1, 493 ORPHAN_CLEANUP_DONE = 2, 494 }; 495 496 void btrfs_init_async_reclaim_work(struct work_struct *work); 497 498 /* fs_info */ 499 struct reloc_control; 500 struct btrfs_device; 501 struct btrfs_fs_devices; 502 struct btrfs_balance_control; 503 struct btrfs_delayed_root; 504 505 /* 506 * Block group or device which contains an active swapfile. Used for preventing 507 * unsafe operations while a swapfile is active. 508 * 509 * These are sorted on (ptr, inode) (note that a block group or device can 510 * contain more than one swapfile). We compare the pointer values because we 511 * don't actually care what the object is, we just need a quick check whether 512 * the object exists in the rbtree. 513 */ 514 struct btrfs_swapfile_pin { 515 struct rb_node node; 516 void *ptr; 517 struct inode *inode; 518 /* 519 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 520 * points to a struct btrfs_device. 521 */ 522 bool is_block_group; 523 }; 524 525 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 526 527 enum { 528 BTRFS_FS_BARRIER, 529 BTRFS_FS_CLOSING_START, 530 BTRFS_FS_CLOSING_DONE, 531 BTRFS_FS_LOG_RECOVERING, 532 BTRFS_FS_OPEN, 533 BTRFS_FS_QUOTA_ENABLED, 534 BTRFS_FS_UPDATE_UUID_TREE_GEN, 535 BTRFS_FS_CREATING_FREE_SPACE_TREE, 536 BTRFS_FS_BTREE_ERR, 537 BTRFS_FS_LOG1_ERR, 538 BTRFS_FS_LOG2_ERR, 539 BTRFS_FS_QUOTA_OVERRIDE, 540 /* Used to record internally whether fs has been frozen */ 541 BTRFS_FS_FROZEN, 542 /* 543 * Indicate that a whole-filesystem exclusive operation is running 544 * (device replace, resize, device add/delete, balance) 545 */ 546 BTRFS_FS_EXCL_OP, 547 /* 548 * To info transaction_kthread we need an immediate commit so it 549 * doesn't need to wait for commit_interval 550 */ 551 BTRFS_FS_NEED_ASYNC_COMMIT, 552 /* 553 * Indicate that balance has been set up from the ioctl and is in the 554 * main phase. The fs_info::balance_ctl is initialized. 555 * Set and cleared while holding fs_info::balance_mutex. 556 */ 557 BTRFS_FS_BALANCE_RUNNING, 558 559 /* Indicate that the cleaner thread is awake and doing something. */ 560 BTRFS_FS_CLEANER_RUNNING, 561 562 /* 563 * The checksumming has an optimized version and is considered fast, 564 * so we don't need to offload checksums to workqueues. 565 */ 566 BTRFS_FS_CSUM_IMPL_FAST, 567 568 /* Indicate that the discard workqueue can service discards. */ 569 BTRFS_FS_DISCARD_RUNNING, 570 }; 571 572 struct btrfs_fs_info { 573 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 574 unsigned long flags; 575 struct btrfs_root *extent_root; 576 struct btrfs_root *tree_root; 577 struct btrfs_root *chunk_root; 578 struct btrfs_root *dev_root; 579 struct btrfs_root *fs_root; 580 struct btrfs_root *csum_root; 581 struct btrfs_root *quota_root; 582 struct btrfs_root *uuid_root; 583 struct btrfs_root *free_space_root; 584 585 /* the log root tree is a directory of all the other log roots */ 586 struct btrfs_root *log_root_tree; 587 588 spinlock_t fs_roots_radix_lock; 589 struct radix_tree_root fs_roots_radix; 590 591 /* block group cache stuff */ 592 spinlock_t block_group_cache_lock; 593 u64 first_logical_byte; 594 struct rb_root block_group_cache_tree; 595 596 /* keep track of unallocated space */ 597 atomic64_t free_chunk_space; 598 599 struct extent_io_tree freed_extents[2]; 600 struct extent_io_tree *pinned_extents; 601 602 /* logical->physical extent mapping */ 603 struct extent_map_tree mapping_tree; 604 605 /* 606 * block reservation for extent, checksum, root tree and 607 * delayed dir index item 608 */ 609 struct btrfs_block_rsv global_block_rsv; 610 /* block reservation for metadata operations */ 611 struct btrfs_block_rsv trans_block_rsv; 612 /* block reservation for chunk tree */ 613 struct btrfs_block_rsv chunk_block_rsv; 614 /* block reservation for delayed operations */ 615 struct btrfs_block_rsv delayed_block_rsv; 616 /* block reservation for delayed refs */ 617 struct btrfs_block_rsv delayed_refs_rsv; 618 619 struct btrfs_block_rsv empty_block_rsv; 620 621 u64 generation; 622 u64 last_trans_committed; 623 u64 avg_delayed_ref_runtime; 624 625 /* 626 * this is updated to the current trans every time a full commit 627 * is required instead of the faster short fsync log commits 628 */ 629 u64 last_trans_log_full_commit; 630 unsigned long mount_opt; 631 /* 632 * Track requests for actions that need to be done during transaction 633 * commit (like for some mount options). 634 */ 635 unsigned long pending_changes; 636 unsigned long compress_type:4; 637 unsigned int compress_level; 638 u32 commit_interval; 639 /* 640 * It is a suggestive number, the read side is safe even it gets a 641 * wrong number because we will write out the data into a regular 642 * extent. The write side(mount/remount) is under ->s_umount lock, 643 * so it is also safe. 644 */ 645 u64 max_inline; 646 647 struct btrfs_transaction *running_transaction; 648 wait_queue_head_t transaction_throttle; 649 wait_queue_head_t transaction_wait; 650 wait_queue_head_t transaction_blocked_wait; 651 wait_queue_head_t async_submit_wait; 652 653 /* 654 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 655 * when they are updated. 656 * 657 * Because we do not clear the flags for ever, so we needn't use 658 * the lock on the read side. 659 * 660 * We also needn't use the lock when we mount the fs, because 661 * there is no other task which will update the flag. 662 */ 663 spinlock_t super_lock; 664 struct btrfs_super_block *super_copy; 665 struct btrfs_super_block *super_for_commit; 666 struct super_block *sb; 667 struct inode *btree_inode; 668 struct mutex tree_log_mutex; 669 struct mutex transaction_kthread_mutex; 670 struct mutex cleaner_mutex; 671 struct mutex chunk_mutex; 672 673 /* 674 * this is taken to make sure we don't set block groups ro after 675 * the free space cache has been allocated on them 676 */ 677 struct mutex ro_block_group_mutex; 678 679 /* this is used during read/modify/write to make sure 680 * no two ios are trying to mod the same stripe at the same 681 * time 682 */ 683 struct btrfs_stripe_hash_table *stripe_hash_table; 684 685 /* 686 * this protects the ordered operations list only while we are 687 * processing all of the entries on it. This way we make 688 * sure the commit code doesn't find the list temporarily empty 689 * because another function happens to be doing non-waiting preflush 690 * before jumping into the main commit. 691 */ 692 struct mutex ordered_operations_mutex; 693 694 struct rw_semaphore commit_root_sem; 695 696 struct rw_semaphore cleanup_work_sem; 697 698 struct rw_semaphore subvol_sem; 699 struct srcu_struct subvol_srcu; 700 701 spinlock_t trans_lock; 702 /* 703 * the reloc mutex goes with the trans lock, it is taken 704 * during commit to protect us from the relocation code 705 */ 706 struct mutex reloc_mutex; 707 708 struct list_head trans_list; 709 struct list_head dead_roots; 710 struct list_head caching_block_groups; 711 712 spinlock_t delayed_iput_lock; 713 struct list_head delayed_iputs; 714 atomic_t nr_delayed_iputs; 715 wait_queue_head_t delayed_iputs_wait; 716 717 atomic64_t tree_mod_seq; 718 719 /* this protects tree_mod_log and tree_mod_seq_list */ 720 rwlock_t tree_mod_log_lock; 721 struct rb_root tree_mod_log; 722 struct list_head tree_mod_seq_list; 723 724 atomic_t async_delalloc_pages; 725 726 /* 727 * this is used to protect the following list -- ordered_roots. 728 */ 729 spinlock_t ordered_root_lock; 730 731 /* 732 * all fs/file tree roots in which there are data=ordered extents 733 * pending writeback are added into this list. 734 * 735 * these can span multiple transactions and basically include 736 * every dirty data page that isn't from nodatacow 737 */ 738 struct list_head ordered_roots; 739 740 struct mutex delalloc_root_mutex; 741 spinlock_t delalloc_root_lock; 742 /* all fs/file tree roots that have delalloc inodes. */ 743 struct list_head delalloc_roots; 744 745 /* 746 * there is a pool of worker threads for checksumming during writes 747 * and a pool for checksumming after reads. This is because readers 748 * can run with FS locks held, and the writers may be waiting for 749 * those locks. We don't want ordering in the pending list to cause 750 * deadlocks, and so the two are serviced separately. 751 * 752 * A third pool does submit_bio to avoid deadlocking with the other 753 * two 754 */ 755 struct btrfs_workqueue *workers; 756 struct btrfs_workqueue *delalloc_workers; 757 struct btrfs_workqueue *flush_workers; 758 struct btrfs_workqueue *endio_workers; 759 struct btrfs_workqueue *endio_meta_workers; 760 struct btrfs_workqueue *endio_raid56_workers; 761 struct btrfs_workqueue *endio_repair_workers; 762 struct btrfs_workqueue *rmw_workers; 763 struct btrfs_workqueue *endio_meta_write_workers; 764 struct btrfs_workqueue *endio_write_workers; 765 struct btrfs_workqueue *endio_freespace_worker; 766 struct btrfs_workqueue *caching_workers; 767 struct btrfs_workqueue *readahead_workers; 768 769 /* 770 * fixup workers take dirty pages that didn't properly go through 771 * the cow mechanism and make them safe to write. It happens 772 * for the sys_munmap function call path 773 */ 774 struct btrfs_workqueue *fixup_workers; 775 struct btrfs_workqueue *delayed_workers; 776 777 struct task_struct *transaction_kthread; 778 struct task_struct *cleaner_kthread; 779 u32 thread_pool_size; 780 781 struct kobject *space_info_kobj; 782 783 u64 total_pinned; 784 785 /* used to keep from writing metadata until there is a nice batch */ 786 struct percpu_counter dirty_metadata_bytes; 787 struct percpu_counter delalloc_bytes; 788 struct percpu_counter dio_bytes; 789 s32 dirty_metadata_batch; 790 s32 delalloc_batch; 791 792 struct list_head dirty_cowonly_roots; 793 794 struct btrfs_fs_devices *fs_devices; 795 796 /* 797 * The space_info list is effectively read only after initial 798 * setup. It is populated at mount time and cleaned up after 799 * all block groups are removed. RCU is used to protect it. 800 */ 801 struct list_head space_info; 802 803 struct btrfs_space_info *data_sinfo; 804 805 struct reloc_control *reloc_ctl; 806 807 /* data_alloc_cluster is only used in ssd_spread mode */ 808 struct btrfs_free_cluster data_alloc_cluster; 809 810 /* all metadata allocations go through this cluster */ 811 struct btrfs_free_cluster meta_alloc_cluster; 812 813 /* auto defrag inodes go here */ 814 spinlock_t defrag_inodes_lock; 815 struct rb_root defrag_inodes; 816 atomic_t defrag_running; 817 818 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 819 seqlock_t profiles_lock; 820 /* 821 * these three are in extended format (availability of single 822 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 823 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 824 */ 825 u64 avail_data_alloc_bits; 826 u64 avail_metadata_alloc_bits; 827 u64 avail_system_alloc_bits; 828 829 /* restriper state */ 830 spinlock_t balance_lock; 831 struct mutex balance_mutex; 832 atomic_t balance_pause_req; 833 atomic_t balance_cancel_req; 834 struct btrfs_balance_control *balance_ctl; 835 wait_queue_head_t balance_wait_q; 836 837 u32 data_chunk_allocations; 838 u32 metadata_ratio; 839 840 void *bdev_holder; 841 842 /* private scrub information */ 843 struct mutex scrub_lock; 844 atomic_t scrubs_running; 845 atomic_t scrub_pause_req; 846 atomic_t scrubs_paused; 847 atomic_t scrub_cancel_req; 848 wait_queue_head_t scrub_pause_wait; 849 /* 850 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 851 * running. 852 */ 853 refcount_t scrub_workers_refcnt; 854 struct btrfs_workqueue *scrub_workers; 855 struct btrfs_workqueue *scrub_wr_completion_workers; 856 struct btrfs_workqueue *scrub_parity_workers; 857 858 struct btrfs_discard_ctl discard_ctl; 859 860 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 861 u32 check_integrity_print_mask; 862 #endif 863 /* is qgroup tracking in a consistent state? */ 864 u64 qgroup_flags; 865 866 /* holds configuration and tracking. Protected by qgroup_lock */ 867 struct rb_root qgroup_tree; 868 spinlock_t qgroup_lock; 869 870 /* 871 * used to avoid frequently calling ulist_alloc()/ulist_free() 872 * when doing qgroup accounting, it must be protected by qgroup_lock. 873 */ 874 struct ulist *qgroup_ulist; 875 876 /* protect user change for quota operations */ 877 struct mutex qgroup_ioctl_lock; 878 879 /* list of dirty qgroups to be written at next commit */ 880 struct list_head dirty_qgroups; 881 882 /* used by qgroup for an efficient tree traversal */ 883 u64 qgroup_seq; 884 885 /* qgroup rescan items */ 886 struct mutex qgroup_rescan_lock; /* protects the progress item */ 887 struct btrfs_key qgroup_rescan_progress; 888 struct btrfs_workqueue *qgroup_rescan_workers; 889 struct completion qgroup_rescan_completion; 890 struct btrfs_work qgroup_rescan_work; 891 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 892 893 /* filesystem state */ 894 unsigned long fs_state; 895 896 struct btrfs_delayed_root *delayed_root; 897 898 /* readahead tree */ 899 spinlock_t reada_lock; 900 struct radix_tree_root reada_tree; 901 902 /* readahead works cnt */ 903 atomic_t reada_works_cnt; 904 905 /* Extent buffer radix tree */ 906 spinlock_t buffer_lock; 907 struct radix_tree_root buffer_radix; 908 909 /* next backup root to be overwritten */ 910 int backup_root_index; 911 912 /* device replace state */ 913 struct btrfs_dev_replace dev_replace; 914 915 struct semaphore uuid_tree_rescan_sem; 916 917 /* Used to reclaim the metadata space in the background. */ 918 struct work_struct async_reclaim_work; 919 920 spinlock_t unused_bgs_lock; 921 struct list_head unused_bgs; 922 struct mutex unused_bg_unpin_mutex; 923 struct mutex delete_unused_bgs_mutex; 924 925 /* Cached block sizes */ 926 u32 nodesize; 927 u32 sectorsize; 928 u32 stripesize; 929 930 /* Block groups and devices containing active swapfiles. */ 931 spinlock_t swapfile_pins_lock; 932 struct rb_root swapfile_pins; 933 934 struct crypto_shash *csum_shash; 935 936 /* 937 * Number of send operations in progress. 938 * Updated while holding fs_info::balance_mutex. 939 */ 940 int send_in_progress; 941 942 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 943 spinlock_t ref_verify_lock; 944 struct rb_root block_tree; 945 #endif 946 947 #ifdef CONFIG_BTRFS_DEBUG 948 struct kobject *debug_kobj; 949 struct kobject *discard_debug_kobj; 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 struct btrfs_subvolume_writers { 959 struct percpu_counter counter; 960 wait_queue_head_t wait; 961 }; 962 963 /* 964 * The state of btrfs root 965 */ 966 enum { 967 /* 968 * btrfs_record_root_in_trans is a multi-step process, and it can race 969 * with the balancing code. But the race is very small, and only the 970 * first time the root is added to each transaction. So IN_TRANS_SETUP 971 * is used to tell us when more checks are required 972 */ 973 BTRFS_ROOT_IN_TRANS_SETUP, 974 BTRFS_ROOT_REF_COWS, 975 BTRFS_ROOT_TRACK_DIRTY, 976 BTRFS_ROOT_IN_RADIX, 977 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 978 BTRFS_ROOT_DEFRAG_RUNNING, 979 BTRFS_ROOT_FORCE_COW, 980 BTRFS_ROOT_MULTI_LOG_TASKS, 981 BTRFS_ROOT_DIRTY, 982 BTRFS_ROOT_DELETING, 983 984 /* 985 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 986 * 987 * Set for the subvolume tree owning the reloc tree. 988 */ 989 BTRFS_ROOT_DEAD_RELOC_TREE, 990 /* Mark dead root stored on device whose cleanup needs to be resumed */ 991 BTRFS_ROOT_DEAD_TREE, 992 }; 993 994 /* 995 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 996 * code. For detail check comment in fs/btrfs/qgroup.c. 997 */ 998 struct btrfs_qgroup_swapped_blocks { 999 spinlock_t lock; 1000 /* RM_EMPTY_ROOT() of above blocks[] */ 1001 bool swapped; 1002 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1003 }; 1004 1005 /* 1006 * in ram representation of the tree. extent_root is used for all allocations 1007 * and for the extent tree extent_root root. 1008 */ 1009 struct btrfs_root { 1010 struct extent_buffer *node; 1011 1012 struct extent_buffer *commit_root; 1013 struct btrfs_root *log_root; 1014 struct btrfs_root *reloc_root; 1015 1016 unsigned long state; 1017 struct btrfs_root_item root_item; 1018 struct btrfs_key root_key; 1019 struct btrfs_fs_info *fs_info; 1020 struct extent_io_tree dirty_log_pages; 1021 1022 struct mutex objectid_mutex; 1023 1024 spinlock_t accounting_lock; 1025 struct btrfs_block_rsv *block_rsv; 1026 1027 /* free ino cache stuff */ 1028 struct btrfs_free_space_ctl *free_ino_ctl; 1029 enum btrfs_caching_type ino_cache_state; 1030 spinlock_t ino_cache_lock; 1031 wait_queue_head_t ino_cache_wait; 1032 struct btrfs_free_space_ctl *free_ino_pinned; 1033 u64 ino_cache_progress; 1034 struct inode *ino_cache_inode; 1035 1036 struct mutex log_mutex; 1037 wait_queue_head_t log_writer_wait; 1038 wait_queue_head_t log_commit_wait[2]; 1039 struct list_head log_ctxs[2]; 1040 atomic_t log_writers; 1041 atomic_t log_commit[2]; 1042 atomic_t log_batch; 1043 int log_transid; 1044 /* No matter the commit succeeds or not*/ 1045 int log_transid_committed; 1046 /* Just be updated when the commit succeeds. */ 1047 int last_log_commit; 1048 pid_t log_start_pid; 1049 1050 u64 last_trans; 1051 1052 u32 type; 1053 1054 u64 highest_objectid; 1055 1056 u64 defrag_trans_start; 1057 struct btrfs_key defrag_progress; 1058 struct btrfs_key defrag_max; 1059 1060 /* the dirty list is only used by non-reference counted roots */ 1061 struct list_head dirty_list; 1062 1063 struct list_head root_list; 1064 1065 spinlock_t log_extents_lock[2]; 1066 struct list_head logged_list[2]; 1067 1068 int orphan_cleanup_state; 1069 1070 spinlock_t inode_lock; 1071 /* red-black tree that keeps track of in-memory inodes */ 1072 struct rb_root inode_tree; 1073 1074 /* 1075 * radix tree that keeps track of delayed nodes of every inode, 1076 * protected by inode_lock 1077 */ 1078 struct radix_tree_root delayed_nodes_tree; 1079 /* 1080 * right now this just gets used so that a root has its own devid 1081 * for stat. It may be used for more later 1082 */ 1083 dev_t anon_dev; 1084 1085 spinlock_t root_item_lock; 1086 refcount_t refs; 1087 1088 struct mutex delalloc_mutex; 1089 spinlock_t delalloc_lock; 1090 /* 1091 * all of the inodes that have delalloc bytes. It is possible for 1092 * this list to be empty even when there is still dirty data=ordered 1093 * extents waiting to finish IO. 1094 */ 1095 struct list_head delalloc_inodes; 1096 struct list_head delalloc_root; 1097 u64 nr_delalloc_inodes; 1098 1099 struct mutex ordered_extent_mutex; 1100 /* 1101 * this is used by the balancing code to wait for all the pending 1102 * ordered extents 1103 */ 1104 spinlock_t ordered_extent_lock; 1105 1106 /* 1107 * all of the data=ordered extents pending writeback 1108 * these can span multiple transactions and basically include 1109 * every dirty data page that isn't from nodatacow 1110 */ 1111 struct list_head ordered_extents; 1112 struct list_head ordered_root; 1113 u64 nr_ordered_extents; 1114 1115 /* 1116 * Not empty if this subvolume root has gone through tree block swap 1117 * (relocation) 1118 * 1119 * Will be used by reloc_control::dirty_subvol_roots. 1120 */ 1121 struct list_head reloc_dirty_list; 1122 1123 /* 1124 * Number of currently running SEND ioctls to prevent 1125 * manipulation with the read-only status via SUBVOL_SETFLAGS 1126 */ 1127 int send_in_progress; 1128 /* 1129 * Number of currently running deduplication operations that have a 1130 * destination inode belonging to this root. Protected by the lock 1131 * root_item_lock. 1132 */ 1133 int dedupe_in_progress; 1134 struct btrfs_subvolume_writers *subv_writers; 1135 atomic_t will_be_snapshotted; 1136 atomic_t snapshot_force_cow; 1137 1138 /* For qgroup metadata reserved space */ 1139 spinlock_t qgroup_meta_rsv_lock; 1140 u64 qgroup_meta_rsv_pertrans; 1141 u64 qgroup_meta_rsv_prealloc; 1142 1143 /* Number of active swapfiles */ 1144 atomic_t nr_swapfiles; 1145 1146 /* Record pairs of swapped blocks for qgroup */ 1147 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1148 1149 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1150 u64 alloc_bytenr; 1151 #endif 1152 }; 1153 1154 struct btrfs_clone_extent_info { 1155 u64 disk_offset; 1156 u64 disk_len; 1157 u64 data_offset; 1158 u64 data_len; 1159 u64 file_offset; 1160 char *extent_buf; 1161 u32 item_size; 1162 }; 1163 1164 struct btrfs_file_private { 1165 void *filldir_buf; 1166 }; 1167 1168 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1169 { 1170 return btrfs_sb(inode->i_sb)->sectorsize; 1171 } 1172 1173 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1174 { 1175 1176 return info->nodesize - sizeof(struct btrfs_header); 1177 } 1178 1179 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1180 1181 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1182 { 1183 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1184 } 1185 1186 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1187 { 1188 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1189 } 1190 1191 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1192 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1193 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1194 { 1195 return BTRFS_MAX_ITEM_SIZE(info) - 1196 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1197 } 1198 1199 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1200 { 1201 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1202 } 1203 1204 /* 1205 * Flags for mount options. 1206 * 1207 * Note: don't forget to add new options to btrfs_show_options() 1208 */ 1209 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1210 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1211 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1212 #define BTRFS_MOUNT_SSD (1 << 3) 1213 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1214 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1215 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1216 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1217 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1218 #define BTRFS_MOUNT_NOSSD (1 << 9) 1219 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1220 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1221 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1222 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1223 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1224 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1225 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1226 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1227 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1228 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1229 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1230 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1231 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1232 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1233 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1234 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1235 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1236 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1237 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1238 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1239 1240 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1241 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1242 1243 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1244 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1245 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1246 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1247 BTRFS_MOUNT_##opt) 1248 1249 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1250 { \ 1251 if (!btrfs_test_opt(fs_info, opt)) \ 1252 btrfs_info(fs_info, fmt, ##args); \ 1253 btrfs_set_opt(fs_info->mount_opt, opt); \ 1254 } 1255 1256 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1257 { \ 1258 if (btrfs_test_opt(fs_info, opt)) \ 1259 btrfs_info(fs_info, fmt, ##args); \ 1260 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1261 } 1262 1263 /* 1264 * Requests for changes that need to be done during transaction commit. 1265 * 1266 * Internal mount options that are used for special handling of the real 1267 * mount options (eg. cannot be set during remount and have to be set during 1268 * transaction commit) 1269 */ 1270 1271 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1272 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1273 #define BTRFS_PENDING_COMMIT (2) 1274 1275 #define btrfs_test_pending(info, opt) \ 1276 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1277 #define btrfs_set_pending(info, opt) \ 1278 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1279 #define btrfs_clear_pending(info, opt) \ 1280 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1281 1282 /* 1283 * Helpers for setting pending mount option changes. 1284 * 1285 * Expects corresponding macros 1286 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1287 */ 1288 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1289 do { \ 1290 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1291 btrfs_info((info), fmt, ##args); \ 1292 btrfs_set_pending((info), SET_##opt); \ 1293 btrfs_clear_pending((info), CLEAR_##opt); \ 1294 } \ 1295 } while(0) 1296 1297 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1298 do { \ 1299 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1300 btrfs_info((info), fmt, ##args); \ 1301 btrfs_set_pending((info), CLEAR_##opt); \ 1302 btrfs_clear_pending((info), SET_##opt); \ 1303 } \ 1304 } while(0) 1305 1306 /* 1307 * Inode flags 1308 */ 1309 #define BTRFS_INODE_NODATASUM (1 << 0) 1310 #define BTRFS_INODE_NODATACOW (1 << 1) 1311 #define BTRFS_INODE_READONLY (1 << 2) 1312 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1313 #define BTRFS_INODE_PREALLOC (1 << 4) 1314 #define BTRFS_INODE_SYNC (1 << 5) 1315 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1316 #define BTRFS_INODE_APPEND (1 << 7) 1317 #define BTRFS_INODE_NODUMP (1 << 8) 1318 #define BTRFS_INODE_NOATIME (1 << 9) 1319 #define BTRFS_INODE_DIRSYNC (1 << 10) 1320 #define BTRFS_INODE_COMPRESS (1 << 11) 1321 1322 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1323 1324 #define BTRFS_INODE_FLAG_MASK \ 1325 (BTRFS_INODE_NODATASUM | \ 1326 BTRFS_INODE_NODATACOW | \ 1327 BTRFS_INODE_READONLY | \ 1328 BTRFS_INODE_NOCOMPRESS | \ 1329 BTRFS_INODE_PREALLOC | \ 1330 BTRFS_INODE_SYNC | \ 1331 BTRFS_INODE_IMMUTABLE | \ 1332 BTRFS_INODE_APPEND | \ 1333 BTRFS_INODE_NODUMP | \ 1334 BTRFS_INODE_NOATIME | \ 1335 BTRFS_INODE_DIRSYNC | \ 1336 BTRFS_INODE_COMPRESS | \ 1337 BTRFS_INODE_ROOT_ITEM_INIT) 1338 1339 struct btrfs_map_token { 1340 const struct extent_buffer *eb; 1341 char *kaddr; 1342 unsigned long offset; 1343 }; 1344 1345 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1346 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1347 1348 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1349 struct extent_buffer *eb) 1350 { 1351 token->eb = eb; 1352 token->kaddr = NULL; 1353 } 1354 1355 /* some macros to generate set/get functions for the struct fields. This 1356 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1357 * one for u8: 1358 */ 1359 #define le8_to_cpu(v) (v) 1360 #define cpu_to_le8(v) (v) 1361 #define __le8 u8 1362 1363 #define read_eb_member(eb, ptr, type, member, result) (\ 1364 read_extent_buffer(eb, (char *)(result), \ 1365 ((unsigned long)(ptr)) + \ 1366 offsetof(type, member), \ 1367 sizeof(((type *)0)->member))) 1368 1369 #define write_eb_member(eb, ptr, type, member, result) (\ 1370 write_extent_buffer(eb, (char *)(result), \ 1371 ((unsigned long)(ptr)) + \ 1372 offsetof(type, member), \ 1373 sizeof(((type *)0)->member))) 1374 1375 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1376 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1377 const void *ptr, unsigned long off, \ 1378 struct btrfs_map_token *token); \ 1379 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1380 unsigned long off, u##bits val, \ 1381 struct btrfs_map_token *token); \ 1382 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1383 const void *ptr, unsigned long off); \ 1384 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1385 unsigned long off, u##bits val); 1386 1387 DECLARE_BTRFS_SETGET_BITS(8) 1388 DECLARE_BTRFS_SETGET_BITS(16) 1389 DECLARE_BTRFS_SETGET_BITS(32) 1390 DECLARE_BTRFS_SETGET_BITS(64) 1391 1392 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1393 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1394 const type *s) \ 1395 { \ 1396 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1397 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1398 } \ 1399 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1400 u##bits val) \ 1401 { \ 1402 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1403 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1404 } \ 1405 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1406 const type *s, \ 1407 struct btrfs_map_token *token) \ 1408 { \ 1409 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1410 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1411 } \ 1412 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1413 type *s, u##bits val, \ 1414 struct btrfs_map_token *token) \ 1415 { \ 1416 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1417 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1418 } 1419 1420 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1421 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1422 { \ 1423 const type *p = page_address(eb->pages[0]); \ 1424 u##bits res = le##bits##_to_cpu(p->member); \ 1425 return res; \ 1426 } \ 1427 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1428 u##bits val) \ 1429 { \ 1430 type *p = page_address(eb->pages[0]); \ 1431 p->member = cpu_to_le##bits(val); \ 1432 } 1433 1434 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1435 static inline u##bits btrfs_##name(const type *s) \ 1436 { \ 1437 return le##bits##_to_cpu(s->member); \ 1438 } \ 1439 static inline void btrfs_set_##name(type *s, u##bits val) \ 1440 { \ 1441 s->member = cpu_to_le##bits(val); \ 1442 } 1443 1444 1445 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1446 struct btrfs_dev_item *s) 1447 { 1448 BUILD_BUG_ON(sizeof(u64) != 1449 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1450 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1451 total_bytes)); 1452 } 1453 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1454 struct btrfs_dev_item *s, 1455 u64 val) 1456 { 1457 BUILD_BUG_ON(sizeof(u64) != 1458 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1459 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1460 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1461 } 1462 1463 1464 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1465 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1466 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1467 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1468 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1469 start_offset, 64); 1470 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1471 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1472 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1473 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1474 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1475 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1476 1477 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1478 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1479 total_bytes, 64); 1480 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1481 bytes_used, 64); 1482 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1483 io_align, 32); 1484 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1485 io_width, 32); 1486 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1487 sector_size, 32); 1488 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1489 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1490 dev_group, 32); 1491 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1492 seek_speed, 8); 1493 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1494 bandwidth, 8); 1495 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1496 generation, 64); 1497 1498 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1499 { 1500 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1501 } 1502 1503 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1504 { 1505 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1506 } 1507 1508 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1509 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1510 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1511 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1512 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1513 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1514 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1515 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1516 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1517 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1518 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1519 1520 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1521 { 1522 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1523 } 1524 1525 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1526 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1527 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1528 stripe_len, 64); 1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1530 io_align, 32); 1531 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1532 io_width, 32); 1533 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1534 sector_size, 32); 1535 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1536 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1537 num_stripes, 16); 1538 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1539 sub_stripes, 16); 1540 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1541 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1542 1543 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1544 int nr) 1545 { 1546 unsigned long offset = (unsigned long)c; 1547 offset += offsetof(struct btrfs_chunk, stripe); 1548 offset += nr * sizeof(struct btrfs_stripe); 1549 return (struct btrfs_stripe *)offset; 1550 } 1551 1552 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1553 { 1554 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1555 } 1556 1557 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1558 struct btrfs_chunk *c, int nr) 1559 { 1560 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1561 } 1562 1563 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1564 struct btrfs_chunk *c, int nr) 1565 { 1566 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1567 } 1568 1569 /* struct btrfs_block_group_item */ 1570 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1571 used, 64); 1572 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1573 used, 64); 1574 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1575 struct btrfs_block_group_item, chunk_objectid, 64); 1576 1577 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1578 struct btrfs_block_group_item, chunk_objectid, 64); 1579 BTRFS_SETGET_FUNCS(block_group_flags, 1580 struct btrfs_block_group_item, flags, 64); 1581 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1582 struct btrfs_block_group_item, flags, 64); 1583 1584 /* struct btrfs_free_space_info */ 1585 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1586 extent_count, 32); 1587 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1588 1589 /* struct btrfs_inode_ref */ 1590 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1591 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1592 1593 /* struct btrfs_inode_extref */ 1594 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1595 parent_objectid, 64); 1596 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1597 name_len, 16); 1598 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1599 1600 /* struct btrfs_inode_item */ 1601 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1602 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1603 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1604 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1605 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1606 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1607 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1608 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1609 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1610 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1611 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1612 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1613 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1614 generation, 64); 1615 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1616 sequence, 64); 1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1618 transid, 64); 1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1620 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1621 nbytes, 64); 1622 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1623 block_group, 64); 1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1625 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1627 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1629 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1630 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1631 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1632 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1633 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1634 1635 /* struct btrfs_dev_extent */ 1636 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1637 chunk_tree, 64); 1638 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1639 chunk_objectid, 64); 1640 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1641 chunk_offset, 64); 1642 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1643 1644 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1645 { 1646 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1647 return (unsigned long)dev + ptr; 1648 } 1649 1650 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1651 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1652 generation, 64); 1653 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1654 1655 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1656 1657 1658 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1659 1660 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1661 struct btrfs_tree_block_info *item, 1662 struct btrfs_disk_key *key) 1663 { 1664 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1665 } 1666 1667 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1668 struct btrfs_tree_block_info *item, 1669 struct btrfs_disk_key *key) 1670 { 1671 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1672 } 1673 1674 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1675 root, 64); 1676 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1677 objectid, 64); 1678 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1679 offset, 64); 1680 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1681 count, 32); 1682 1683 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1684 count, 32); 1685 1686 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1687 type, 8); 1688 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1689 offset, 64); 1690 1691 static inline u32 btrfs_extent_inline_ref_size(int type) 1692 { 1693 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1694 type == BTRFS_SHARED_BLOCK_REF_KEY) 1695 return sizeof(struct btrfs_extent_inline_ref); 1696 if (type == BTRFS_SHARED_DATA_REF_KEY) 1697 return sizeof(struct btrfs_shared_data_ref) + 1698 sizeof(struct btrfs_extent_inline_ref); 1699 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1700 return sizeof(struct btrfs_extent_data_ref) + 1701 offsetof(struct btrfs_extent_inline_ref, offset); 1702 return 0; 1703 } 1704 1705 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1706 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1707 generation, 64); 1708 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1709 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1710 1711 /* struct btrfs_node */ 1712 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1713 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1714 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1715 blockptr, 64); 1716 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1717 generation, 64); 1718 1719 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1720 { 1721 unsigned long ptr; 1722 ptr = offsetof(struct btrfs_node, ptrs) + 1723 sizeof(struct btrfs_key_ptr) * nr; 1724 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1725 } 1726 1727 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1728 int nr, u64 val) 1729 { 1730 unsigned long ptr; 1731 ptr = offsetof(struct btrfs_node, ptrs) + 1732 sizeof(struct btrfs_key_ptr) * nr; 1733 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1734 } 1735 1736 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1737 { 1738 unsigned long ptr; 1739 ptr = offsetof(struct btrfs_node, ptrs) + 1740 sizeof(struct btrfs_key_ptr) * nr; 1741 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1742 } 1743 1744 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1745 int nr, u64 val) 1746 { 1747 unsigned long ptr; 1748 ptr = offsetof(struct btrfs_node, ptrs) + 1749 sizeof(struct btrfs_key_ptr) * nr; 1750 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1751 } 1752 1753 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1754 { 1755 return offsetof(struct btrfs_node, ptrs) + 1756 sizeof(struct btrfs_key_ptr) * nr; 1757 } 1758 1759 void btrfs_node_key(const struct extent_buffer *eb, 1760 struct btrfs_disk_key *disk_key, int nr); 1761 1762 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1763 struct btrfs_disk_key *disk_key, int nr) 1764 { 1765 unsigned long ptr; 1766 ptr = btrfs_node_key_ptr_offset(nr); 1767 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1768 struct btrfs_key_ptr, key, disk_key); 1769 } 1770 1771 /* struct btrfs_item */ 1772 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1773 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1774 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1775 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1776 1777 static inline unsigned long btrfs_item_nr_offset(int nr) 1778 { 1779 return offsetof(struct btrfs_leaf, items) + 1780 sizeof(struct btrfs_item) * nr; 1781 } 1782 1783 static inline struct btrfs_item *btrfs_item_nr(int nr) 1784 { 1785 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1786 } 1787 1788 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1789 struct btrfs_item *item) 1790 { 1791 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1792 } 1793 1794 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1795 { 1796 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1797 } 1798 1799 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1800 { 1801 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1802 } 1803 1804 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1805 { 1806 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1807 } 1808 1809 static inline void btrfs_item_key(const struct extent_buffer *eb, 1810 struct btrfs_disk_key *disk_key, int nr) 1811 { 1812 struct btrfs_item *item = btrfs_item_nr(nr); 1813 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1814 } 1815 1816 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1817 struct btrfs_disk_key *disk_key, int nr) 1818 { 1819 struct btrfs_item *item = btrfs_item_nr(nr); 1820 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1821 } 1822 1823 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1824 1825 /* 1826 * struct btrfs_root_ref 1827 */ 1828 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1829 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1830 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1831 1832 /* struct btrfs_dir_item */ 1833 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1834 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1835 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1836 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1837 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1838 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1839 data_len, 16); 1840 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1841 name_len, 16); 1842 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1843 transid, 64); 1844 1845 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1846 const struct btrfs_dir_item *item, 1847 struct btrfs_disk_key *key) 1848 { 1849 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1850 } 1851 1852 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1853 struct btrfs_dir_item *item, 1854 const struct btrfs_disk_key *key) 1855 { 1856 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1857 } 1858 1859 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1860 num_entries, 64); 1861 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1862 num_bitmaps, 64); 1863 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1864 generation, 64); 1865 1866 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1867 const struct btrfs_free_space_header *h, 1868 struct btrfs_disk_key *key) 1869 { 1870 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1871 } 1872 1873 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1874 struct btrfs_free_space_header *h, 1875 const struct btrfs_disk_key *key) 1876 { 1877 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1878 } 1879 1880 /* struct btrfs_disk_key */ 1881 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1882 objectid, 64); 1883 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1884 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1885 1886 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1887 const struct btrfs_disk_key *disk) 1888 { 1889 cpu->offset = le64_to_cpu(disk->offset); 1890 cpu->type = disk->type; 1891 cpu->objectid = le64_to_cpu(disk->objectid); 1892 } 1893 1894 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1895 const struct btrfs_key *cpu) 1896 { 1897 disk->offset = cpu_to_le64(cpu->offset); 1898 disk->type = cpu->type; 1899 disk->objectid = cpu_to_le64(cpu->objectid); 1900 } 1901 1902 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1903 struct btrfs_key *key, int nr) 1904 { 1905 struct btrfs_disk_key disk_key; 1906 btrfs_node_key(eb, &disk_key, nr); 1907 btrfs_disk_key_to_cpu(key, &disk_key); 1908 } 1909 1910 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1911 struct btrfs_key *key, int nr) 1912 { 1913 struct btrfs_disk_key disk_key; 1914 btrfs_item_key(eb, &disk_key, nr); 1915 btrfs_disk_key_to_cpu(key, &disk_key); 1916 } 1917 1918 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1919 const struct btrfs_dir_item *item, 1920 struct btrfs_key *key) 1921 { 1922 struct btrfs_disk_key disk_key; 1923 btrfs_dir_item_key(eb, item, &disk_key); 1924 btrfs_disk_key_to_cpu(key, &disk_key); 1925 } 1926 1927 /* struct btrfs_header */ 1928 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1929 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1930 generation, 64); 1931 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1932 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1933 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1934 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1935 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 1936 generation, 64); 1937 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 1938 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 1939 nritems, 32); 1940 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 1941 1942 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 1943 { 1944 return (btrfs_header_flags(eb) & flag) == flag; 1945 } 1946 1947 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1948 { 1949 u64 flags = btrfs_header_flags(eb); 1950 btrfs_set_header_flags(eb, flags | flag); 1951 } 1952 1953 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1954 { 1955 u64 flags = btrfs_header_flags(eb); 1956 btrfs_set_header_flags(eb, flags & ~flag); 1957 } 1958 1959 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 1960 { 1961 u64 flags = btrfs_header_flags(eb); 1962 return flags >> BTRFS_BACKREF_REV_SHIFT; 1963 } 1964 1965 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1966 int rev) 1967 { 1968 u64 flags = btrfs_header_flags(eb); 1969 flags &= ~BTRFS_BACKREF_REV_MASK; 1970 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1971 btrfs_set_header_flags(eb, flags); 1972 } 1973 1974 static inline unsigned long btrfs_header_fsid(void) 1975 { 1976 return offsetof(struct btrfs_header, fsid); 1977 } 1978 1979 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 1980 { 1981 return offsetof(struct btrfs_header, chunk_tree_uuid); 1982 } 1983 1984 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 1985 { 1986 return btrfs_header_level(eb) == 0; 1987 } 1988 1989 /* struct btrfs_root_item */ 1990 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1991 generation, 64); 1992 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1993 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1994 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1995 1996 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1997 generation, 64); 1998 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1999 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2000 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2001 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2002 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2003 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2004 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2005 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2006 last_snapshot, 64); 2007 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2008 generation_v2, 64); 2009 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2010 ctransid, 64); 2011 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2012 otransid, 64); 2013 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2014 stransid, 64); 2015 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2016 rtransid, 64); 2017 2018 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2019 { 2020 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2021 } 2022 2023 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2024 { 2025 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2026 } 2027 2028 /* struct btrfs_root_backup */ 2029 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2030 tree_root, 64); 2031 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2032 tree_root_gen, 64); 2033 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2034 tree_root_level, 8); 2035 2036 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2037 chunk_root, 64); 2038 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2039 chunk_root_gen, 64); 2040 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2041 chunk_root_level, 8); 2042 2043 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2044 extent_root, 64); 2045 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2046 extent_root_gen, 64); 2047 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2048 extent_root_level, 8); 2049 2050 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2051 fs_root, 64); 2052 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2053 fs_root_gen, 64); 2054 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2055 fs_root_level, 8); 2056 2057 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2058 dev_root, 64); 2059 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2060 dev_root_gen, 64); 2061 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2062 dev_root_level, 8); 2063 2064 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2065 csum_root, 64); 2066 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2067 csum_root_gen, 64); 2068 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2069 csum_root_level, 8); 2070 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2071 total_bytes, 64); 2072 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2073 bytes_used, 64); 2074 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2075 num_devices, 64); 2076 2077 /* struct btrfs_balance_item */ 2078 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2079 2080 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2081 const struct btrfs_balance_item *bi, 2082 struct btrfs_disk_balance_args *ba) 2083 { 2084 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2085 } 2086 2087 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2088 struct btrfs_balance_item *bi, 2089 const struct btrfs_disk_balance_args *ba) 2090 { 2091 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2092 } 2093 2094 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2095 const struct btrfs_balance_item *bi, 2096 struct btrfs_disk_balance_args *ba) 2097 { 2098 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2099 } 2100 2101 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2102 struct btrfs_balance_item *bi, 2103 const struct btrfs_disk_balance_args *ba) 2104 { 2105 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2106 } 2107 2108 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2109 const struct btrfs_balance_item *bi, 2110 struct btrfs_disk_balance_args *ba) 2111 { 2112 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2113 } 2114 2115 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2116 struct btrfs_balance_item *bi, 2117 const struct btrfs_disk_balance_args *ba) 2118 { 2119 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2120 } 2121 2122 static inline void 2123 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2124 const struct btrfs_disk_balance_args *disk) 2125 { 2126 memset(cpu, 0, sizeof(*cpu)); 2127 2128 cpu->profiles = le64_to_cpu(disk->profiles); 2129 cpu->usage = le64_to_cpu(disk->usage); 2130 cpu->devid = le64_to_cpu(disk->devid); 2131 cpu->pstart = le64_to_cpu(disk->pstart); 2132 cpu->pend = le64_to_cpu(disk->pend); 2133 cpu->vstart = le64_to_cpu(disk->vstart); 2134 cpu->vend = le64_to_cpu(disk->vend); 2135 cpu->target = le64_to_cpu(disk->target); 2136 cpu->flags = le64_to_cpu(disk->flags); 2137 cpu->limit = le64_to_cpu(disk->limit); 2138 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2139 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2140 } 2141 2142 static inline void 2143 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2144 const struct btrfs_balance_args *cpu) 2145 { 2146 memset(disk, 0, sizeof(*disk)); 2147 2148 disk->profiles = cpu_to_le64(cpu->profiles); 2149 disk->usage = cpu_to_le64(cpu->usage); 2150 disk->devid = cpu_to_le64(cpu->devid); 2151 disk->pstart = cpu_to_le64(cpu->pstart); 2152 disk->pend = cpu_to_le64(cpu->pend); 2153 disk->vstart = cpu_to_le64(cpu->vstart); 2154 disk->vend = cpu_to_le64(cpu->vend); 2155 disk->target = cpu_to_le64(cpu->target); 2156 disk->flags = cpu_to_le64(cpu->flags); 2157 disk->limit = cpu_to_le64(cpu->limit); 2158 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2159 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2160 } 2161 2162 /* struct btrfs_super_block */ 2163 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2164 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2165 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2166 generation, 64); 2167 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2168 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2169 struct btrfs_super_block, sys_chunk_array_size, 32); 2170 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2171 struct btrfs_super_block, chunk_root_generation, 64); 2172 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2173 root_level, 8); 2174 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2175 chunk_root, 64); 2176 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2177 chunk_root_level, 8); 2178 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2179 log_root, 64); 2180 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2181 log_root_transid, 64); 2182 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2183 log_root_level, 8); 2184 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2185 total_bytes, 64); 2186 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2187 bytes_used, 64); 2188 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2189 sectorsize, 32); 2190 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2191 nodesize, 32); 2192 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2193 stripesize, 32); 2194 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2195 root_dir_objectid, 64); 2196 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2197 num_devices, 64); 2198 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2199 compat_flags, 64); 2200 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2201 compat_ro_flags, 64); 2202 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2203 incompat_flags, 64); 2204 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2205 csum_type, 16); 2206 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2207 cache_generation, 64); 2208 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2209 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2210 uuid_tree_generation, 64); 2211 2212 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2213 const char *btrfs_super_csum_name(u16 csum_type); 2214 const char *btrfs_super_csum_driver(u16 csum_type); 2215 size_t __const btrfs_get_num_csums(void); 2216 2217 2218 /* 2219 * The leaf data grows from end-to-front in the node. 2220 * this returns the address of the start of the last item, 2221 * which is the stop of the leaf data stack 2222 */ 2223 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2224 { 2225 u32 nr = btrfs_header_nritems(leaf); 2226 2227 if (nr == 0) 2228 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2229 return btrfs_item_offset_nr(leaf, nr - 1); 2230 } 2231 2232 /* struct btrfs_file_extent_item */ 2233 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2235 struct btrfs_file_extent_item, disk_bytenr, 64); 2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2237 struct btrfs_file_extent_item, offset, 64); 2238 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2239 struct btrfs_file_extent_item, generation, 64); 2240 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2241 struct btrfs_file_extent_item, num_bytes, 64); 2242 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2243 struct btrfs_file_extent_item, disk_num_bytes, 64); 2244 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2245 struct btrfs_file_extent_item, compression, 8); 2246 2247 static inline unsigned long 2248 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2249 { 2250 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2251 } 2252 2253 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2254 { 2255 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2256 } 2257 2258 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2259 disk_bytenr, 64); 2260 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2261 generation, 64); 2262 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2263 disk_num_bytes, 64); 2264 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2265 offset, 64); 2266 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2267 num_bytes, 64); 2268 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2269 ram_bytes, 64); 2270 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2271 compression, 8); 2272 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2273 encryption, 8); 2274 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2275 other_encoding, 16); 2276 2277 /* 2278 * this returns the number of bytes used by the item on disk, minus the 2279 * size of any extent headers. If a file is compressed on disk, this is 2280 * the compressed size 2281 */ 2282 static inline u32 btrfs_file_extent_inline_item_len( 2283 const struct extent_buffer *eb, 2284 struct btrfs_item *e) 2285 { 2286 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2287 } 2288 2289 /* btrfs_qgroup_status_item */ 2290 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2291 generation, 64); 2292 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2293 version, 64); 2294 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2295 flags, 64); 2296 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2297 rescan, 64); 2298 2299 /* btrfs_qgroup_info_item */ 2300 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2301 generation, 64); 2302 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2303 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2304 rfer_cmpr, 64); 2305 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2306 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2307 excl_cmpr, 64); 2308 2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2310 struct btrfs_qgroup_info_item, generation, 64); 2311 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2312 rfer, 64); 2313 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2314 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2315 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2316 excl, 64); 2317 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2318 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2319 2320 /* btrfs_qgroup_limit_item */ 2321 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2322 flags, 64); 2323 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2324 max_rfer, 64); 2325 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2326 max_excl, 64); 2327 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2328 rsv_rfer, 64); 2329 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2330 rsv_excl, 64); 2331 2332 /* btrfs_dev_replace_item */ 2333 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2334 struct btrfs_dev_replace_item, src_devid, 64); 2335 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2336 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2337 64); 2338 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2339 replace_state, 64); 2340 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2341 time_started, 64); 2342 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2343 time_stopped, 64); 2344 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2345 num_write_errors, 64); 2346 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2347 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2348 64); 2349 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2350 cursor_left, 64); 2351 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2352 cursor_right, 64); 2353 2354 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2355 struct btrfs_dev_replace_item, src_devid, 64); 2356 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2357 struct btrfs_dev_replace_item, 2358 cont_reading_from_srcdev_mode, 64); 2359 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2360 struct btrfs_dev_replace_item, replace_state, 64); 2361 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2362 struct btrfs_dev_replace_item, time_started, 64); 2363 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2364 struct btrfs_dev_replace_item, time_stopped, 64); 2365 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2366 struct btrfs_dev_replace_item, num_write_errors, 64); 2367 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2368 struct btrfs_dev_replace_item, 2369 num_uncorrectable_read_errors, 64); 2370 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2371 struct btrfs_dev_replace_item, cursor_left, 64); 2372 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2373 struct btrfs_dev_replace_item, cursor_right, 64); 2374 2375 /* helper function to cast into the data area of the leaf. */ 2376 #define btrfs_item_ptr(leaf, slot, type) \ 2377 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2378 btrfs_item_offset_nr(leaf, slot))) 2379 2380 #define btrfs_item_ptr_offset(leaf, slot) \ 2381 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2382 btrfs_item_offset_nr(leaf, slot))) 2383 2384 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2385 { 2386 return crc32c(crc, address, length); 2387 } 2388 2389 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2390 { 2391 put_unaligned_le32(~crc, result); 2392 } 2393 2394 static inline u64 btrfs_name_hash(const char *name, int len) 2395 { 2396 return crc32c((u32)~1, name, len); 2397 } 2398 2399 /* 2400 * Figure the key offset of an extended inode ref 2401 */ 2402 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2403 int len) 2404 { 2405 return (u64) crc32c(parent_objectid, name, len); 2406 } 2407 2408 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2409 { 2410 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2411 } 2412 2413 /* extent-tree.c */ 2414 2415 enum btrfs_inline_ref_type { 2416 BTRFS_REF_TYPE_INVALID, 2417 BTRFS_REF_TYPE_BLOCK, 2418 BTRFS_REF_TYPE_DATA, 2419 BTRFS_REF_TYPE_ANY, 2420 }; 2421 2422 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2423 struct btrfs_extent_inline_ref *iref, 2424 enum btrfs_inline_ref_type is_data); 2425 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2426 2427 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2428 2429 /* 2430 * Use this if we would be adding new items, as we could split nodes as we cow 2431 * down the tree. 2432 */ 2433 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2434 unsigned num_items) 2435 { 2436 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2437 } 2438 2439 /* 2440 * Doing a truncate or a modification won't result in new nodes or leaves, just 2441 * what we need for COW. 2442 */ 2443 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2444 unsigned num_items) 2445 { 2446 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2447 } 2448 2449 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2450 u64 start, u64 num_bytes); 2451 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2452 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2453 unsigned long count); 2454 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2455 struct btrfs_delayed_ref_root *delayed_refs, 2456 struct btrfs_delayed_ref_head *head); 2457 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2458 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2459 struct btrfs_fs_info *fs_info, u64 bytenr, 2460 u64 offset, int metadata, u64 *refs, u64 *flags); 2461 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2462 u64 bytenr, u64 num, int reserved); 2463 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2464 u64 bytenr, u64 num_bytes); 2465 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2466 int btrfs_cross_ref_exist(struct btrfs_root *root, 2467 u64 objectid, u64 offset, u64 bytenr); 2468 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2469 struct btrfs_root *root, 2470 u64 parent, u64 root_objectid, 2471 const struct btrfs_disk_key *key, 2472 int level, u64 hint, 2473 u64 empty_size); 2474 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2475 struct btrfs_root *root, 2476 struct extent_buffer *buf, 2477 u64 parent, int last_ref); 2478 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2479 struct btrfs_root *root, u64 owner, 2480 u64 offset, u64 ram_bytes, 2481 struct btrfs_key *ins); 2482 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2483 u64 root_objectid, u64 owner, u64 offset, 2484 struct btrfs_key *ins); 2485 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2486 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2487 struct btrfs_key *ins, int is_data, int delalloc); 2488 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2489 struct extent_buffer *buf, int full_backref); 2490 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2491 struct extent_buffer *buf, int full_backref); 2492 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2493 u64 bytenr, u64 num_bytes, u64 flags, 2494 int level, int is_data); 2495 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2496 2497 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2498 u64 start, u64 len, int delalloc); 2499 int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start, 2500 u64 len); 2501 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2502 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2503 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2504 struct btrfs_ref *generic_ref); 2505 2506 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2507 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache); 2508 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache); 2509 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2510 2511 enum btrfs_reserve_flush_enum { 2512 /* If we are in the transaction, we can't flush anything.*/ 2513 BTRFS_RESERVE_NO_FLUSH, 2514 /* 2515 * Flushing delalloc may cause deadlock somewhere, in this 2516 * case, use FLUSH LIMIT 2517 */ 2518 BTRFS_RESERVE_FLUSH_LIMIT, 2519 BTRFS_RESERVE_FLUSH_EVICT, 2520 BTRFS_RESERVE_FLUSH_ALL, 2521 }; 2522 2523 enum btrfs_flush_state { 2524 FLUSH_DELAYED_ITEMS_NR = 1, 2525 FLUSH_DELAYED_ITEMS = 2, 2526 FLUSH_DELAYED_REFS_NR = 3, 2527 FLUSH_DELAYED_REFS = 4, 2528 FLUSH_DELALLOC = 5, 2529 FLUSH_DELALLOC_WAIT = 6, 2530 ALLOC_CHUNK = 7, 2531 ALLOC_CHUNK_FORCE = 8, 2532 RUN_DELAYED_IPUTS = 9, 2533 COMMIT_TRANS = 10, 2534 }; 2535 2536 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2537 struct btrfs_block_rsv *rsv, 2538 int nitems, bool use_global_rsv); 2539 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2540 struct btrfs_block_rsv *rsv); 2541 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2542 2543 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2544 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2545 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2546 u64 start, u64 end); 2547 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2548 u64 num_bytes, u64 *actual_bytes); 2549 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2550 2551 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2552 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2553 struct btrfs_fs_info *fs_info); 2554 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2555 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2556 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2557 2558 /* ctree.c */ 2559 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2560 int level, int *slot); 2561 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2562 int btrfs_previous_item(struct btrfs_root *root, 2563 struct btrfs_path *path, u64 min_objectid, 2564 int type); 2565 int btrfs_previous_extent_item(struct btrfs_root *root, 2566 struct btrfs_path *path, u64 min_objectid); 2567 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2568 struct btrfs_path *path, 2569 const struct btrfs_key *new_key); 2570 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2571 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2572 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2573 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2574 struct btrfs_key *key, int lowest_level, 2575 u64 min_trans); 2576 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2577 struct btrfs_path *path, 2578 u64 min_trans); 2579 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2580 int slot); 2581 2582 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2583 struct btrfs_root *root, struct extent_buffer *buf, 2584 struct extent_buffer *parent, int parent_slot, 2585 struct extent_buffer **cow_ret); 2586 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2587 struct btrfs_root *root, 2588 struct extent_buffer *buf, 2589 struct extent_buffer **cow_ret, u64 new_root_objectid); 2590 int btrfs_block_can_be_shared(struct btrfs_root *root, 2591 struct extent_buffer *buf); 2592 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2593 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2594 int btrfs_split_item(struct btrfs_trans_handle *trans, 2595 struct btrfs_root *root, 2596 struct btrfs_path *path, 2597 const struct btrfs_key *new_key, 2598 unsigned long split_offset); 2599 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2600 struct btrfs_root *root, 2601 struct btrfs_path *path, 2602 const struct btrfs_key *new_key); 2603 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2604 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2605 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2606 const struct btrfs_key *key, struct btrfs_path *p, 2607 int ins_len, int cow); 2608 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2609 struct btrfs_path *p, u64 time_seq); 2610 int btrfs_search_slot_for_read(struct btrfs_root *root, 2611 const struct btrfs_key *key, 2612 struct btrfs_path *p, int find_higher, 2613 int return_any); 2614 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2615 struct btrfs_root *root, struct extent_buffer *parent, 2616 int start_slot, u64 *last_ret, 2617 struct btrfs_key *progress); 2618 void btrfs_release_path(struct btrfs_path *p); 2619 struct btrfs_path *btrfs_alloc_path(void); 2620 void btrfs_free_path(struct btrfs_path *p); 2621 2622 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2623 struct btrfs_path *path, int slot, int nr); 2624 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2625 struct btrfs_root *root, 2626 struct btrfs_path *path) 2627 { 2628 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2629 } 2630 2631 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2632 const struct btrfs_key *cpu_key, u32 *data_size, 2633 u32 total_data, u32 total_size, int nr); 2634 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2635 const struct btrfs_key *key, void *data, u32 data_size); 2636 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2637 struct btrfs_root *root, 2638 struct btrfs_path *path, 2639 const struct btrfs_key *cpu_key, u32 *data_size, 2640 int nr); 2641 2642 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2643 struct btrfs_root *root, 2644 struct btrfs_path *path, 2645 const struct btrfs_key *key, 2646 u32 data_size) 2647 { 2648 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2649 } 2650 2651 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2652 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2653 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2654 u64 time_seq); 2655 static inline int btrfs_next_old_item(struct btrfs_root *root, 2656 struct btrfs_path *p, u64 time_seq) 2657 { 2658 ++p->slots[0]; 2659 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2660 return btrfs_next_old_leaf(root, p, time_seq); 2661 return 0; 2662 } 2663 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2664 { 2665 return btrfs_next_old_item(root, p, 0); 2666 } 2667 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2668 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2669 struct btrfs_block_rsv *block_rsv, 2670 int update_ref, int for_reloc); 2671 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2672 struct btrfs_root *root, 2673 struct extent_buffer *node, 2674 struct extent_buffer *parent); 2675 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2676 { 2677 /* 2678 * Do it this way so we only ever do one test_bit in the normal case. 2679 */ 2680 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2681 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2682 return 2; 2683 return 1; 2684 } 2685 return 0; 2686 } 2687 2688 /* 2689 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2690 * anything except sleeping. This function is used to check the status of 2691 * the fs. 2692 */ 2693 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2694 { 2695 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2696 } 2697 2698 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2699 { 2700 kfree(fs_info->balance_ctl); 2701 kfree(fs_info->delayed_root); 2702 kfree(fs_info->extent_root); 2703 kfree(fs_info->tree_root); 2704 kfree(fs_info->chunk_root); 2705 kfree(fs_info->dev_root); 2706 kfree(fs_info->csum_root); 2707 kfree(fs_info->quota_root); 2708 kfree(fs_info->uuid_root); 2709 kfree(fs_info->free_space_root); 2710 kfree(fs_info->super_copy); 2711 kfree(fs_info->super_for_commit); 2712 kvfree(fs_info); 2713 } 2714 2715 /* tree mod log functions from ctree.c */ 2716 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2717 struct seq_list *elem); 2718 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2719 struct seq_list *elem); 2720 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2721 2722 /* root-item.c */ 2723 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2724 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2725 int name_len); 2726 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2727 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2728 int name_len); 2729 int btrfs_del_root(struct btrfs_trans_handle *trans, 2730 const struct btrfs_key *key); 2731 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2732 const struct btrfs_key *key, 2733 struct btrfs_root_item *item); 2734 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2735 struct btrfs_root *root, 2736 struct btrfs_key *key, 2737 struct btrfs_root_item *item); 2738 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2739 struct btrfs_path *path, struct btrfs_root_item *root_item, 2740 struct btrfs_key *root_key); 2741 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2742 void btrfs_set_root_node(struct btrfs_root_item *item, 2743 struct extent_buffer *node); 2744 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2745 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2746 struct btrfs_root *root); 2747 2748 /* uuid-tree.c */ 2749 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2750 u64 subid); 2751 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2752 u64 subid); 2753 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2754 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2755 u64)); 2756 2757 /* dir-item.c */ 2758 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2759 const char *name, int name_len); 2760 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2761 int name_len, struct btrfs_inode *dir, 2762 struct btrfs_key *location, u8 type, u64 index); 2763 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2764 struct btrfs_root *root, 2765 struct btrfs_path *path, u64 dir, 2766 const char *name, int name_len, 2767 int mod); 2768 struct btrfs_dir_item * 2769 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2770 struct btrfs_root *root, 2771 struct btrfs_path *path, u64 dir, 2772 u64 objectid, const char *name, int name_len, 2773 int mod); 2774 struct btrfs_dir_item * 2775 btrfs_search_dir_index_item(struct btrfs_root *root, 2776 struct btrfs_path *path, u64 dirid, 2777 const char *name, int name_len); 2778 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2779 struct btrfs_root *root, 2780 struct btrfs_path *path, 2781 struct btrfs_dir_item *di); 2782 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2783 struct btrfs_root *root, 2784 struct btrfs_path *path, u64 objectid, 2785 const char *name, u16 name_len, 2786 const void *data, u16 data_len); 2787 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2788 struct btrfs_root *root, 2789 struct btrfs_path *path, u64 dir, 2790 const char *name, u16 name_len, 2791 int mod); 2792 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2793 struct btrfs_path *path, 2794 const char *name, 2795 int name_len); 2796 2797 /* orphan.c */ 2798 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2799 struct btrfs_root *root, u64 offset); 2800 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2801 struct btrfs_root *root, u64 offset); 2802 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2803 2804 /* inode-item.c */ 2805 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2806 struct btrfs_root *root, 2807 const char *name, int name_len, 2808 u64 inode_objectid, u64 ref_objectid, u64 index); 2809 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2810 struct btrfs_root *root, 2811 const char *name, int name_len, 2812 u64 inode_objectid, u64 ref_objectid, u64 *index); 2813 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2814 struct btrfs_root *root, 2815 struct btrfs_path *path, u64 objectid); 2816 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2817 *root, struct btrfs_path *path, 2818 struct btrfs_key *location, int mod); 2819 2820 struct btrfs_inode_extref * 2821 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2822 struct btrfs_root *root, 2823 struct btrfs_path *path, 2824 const char *name, int name_len, 2825 u64 inode_objectid, u64 ref_objectid, int ins_len, 2826 int cow); 2827 2828 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2829 int slot, const char *name, 2830 int name_len); 2831 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2832 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2833 const char *name, int name_len); 2834 /* file-item.c */ 2835 struct btrfs_dio_private; 2836 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2837 struct btrfs_root *root, u64 bytenr, u64 len); 2838 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2839 u64 offset, u8 *dst); 2840 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2841 struct btrfs_root *root, 2842 u64 objectid, u64 pos, 2843 u64 disk_offset, u64 disk_num_bytes, 2844 u64 num_bytes, u64 offset, u64 ram_bytes, 2845 u8 compression, u8 encryption, u16 other_encoding); 2846 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2847 struct btrfs_root *root, 2848 struct btrfs_path *path, u64 objectid, 2849 u64 bytenr, int mod); 2850 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2851 struct btrfs_root *root, 2852 struct btrfs_ordered_sum *sums); 2853 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 2854 u64 file_start, int contig); 2855 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2856 struct list_head *list, int search_commit); 2857 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2858 const struct btrfs_path *path, 2859 struct btrfs_file_extent_item *fi, 2860 const bool new_inline, 2861 struct extent_map *em); 2862 2863 /* inode.c */ 2864 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2865 u64 start, u64 len); 2866 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2867 u64 *orig_start, u64 *orig_block_len, 2868 u64 *ram_bytes); 2869 2870 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2871 struct btrfs_inode *inode); 2872 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2873 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2874 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2875 struct btrfs_root *root, 2876 struct btrfs_inode *dir, struct btrfs_inode *inode, 2877 const char *name, int name_len); 2878 int btrfs_add_link(struct btrfs_trans_handle *trans, 2879 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2880 const char *name, int name_len, int add_backref, u64 index); 2881 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2882 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2883 int front); 2884 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2885 struct btrfs_root *root, 2886 struct inode *inode, u64 new_size, 2887 u32 min_type); 2888 2889 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 2890 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 2891 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2892 unsigned int extra_bits, 2893 struct extent_state **cached_state); 2894 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2895 struct btrfs_root *new_root, 2896 struct btrfs_root *parent_root, 2897 u64 new_dirid); 2898 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 2899 unsigned *bits); 2900 void btrfs_clear_delalloc_extent(struct inode *inode, 2901 struct extent_state *state, unsigned *bits); 2902 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 2903 struct extent_state *other); 2904 void btrfs_split_delalloc_extent(struct inode *inode, 2905 struct extent_state *orig, u64 split); 2906 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 2907 unsigned long bio_flags); 2908 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 2909 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 2910 int btrfs_readpage(struct file *file, struct page *page); 2911 void btrfs_evict_inode(struct inode *inode); 2912 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2913 struct inode *btrfs_alloc_inode(struct super_block *sb); 2914 void btrfs_destroy_inode(struct inode *inode); 2915 void btrfs_free_inode(struct inode *inode); 2916 int btrfs_drop_inode(struct inode *inode); 2917 int __init btrfs_init_cachep(void); 2918 void __cold btrfs_destroy_cachep(void); 2919 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 2920 struct btrfs_root *root, struct btrfs_path *path); 2921 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2922 struct btrfs_root *root); 2923 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 2924 struct page *page, size_t pg_offset, 2925 u64 start, u64 end); 2926 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2927 struct btrfs_root *root, 2928 struct inode *inode); 2929 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 2930 struct btrfs_root *root, struct inode *inode); 2931 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 2932 struct btrfs_inode *inode); 2933 int btrfs_orphan_cleanup(struct btrfs_root *root); 2934 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 2935 void btrfs_add_delayed_iput(struct inode *inode); 2936 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 2937 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 2938 int btrfs_prealloc_file_range(struct inode *inode, int mode, 2939 u64 start, u64 num_bytes, u64 min_size, 2940 loff_t actual_len, u64 *alloc_hint); 2941 int btrfs_prealloc_file_range_trans(struct inode *inode, 2942 struct btrfs_trans_handle *trans, int mode, 2943 u64 start, u64 num_bytes, u64 min_size, 2944 loff_t actual_len, u64 *alloc_hint); 2945 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 2946 u64 start, u64 end, int *page_started, unsigned long *nr_written, 2947 struct writeback_control *wbc); 2948 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 2949 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 2950 u64 end, int uptodate); 2951 extern const struct dentry_operations btrfs_dentry_operations; 2952 2953 /* ioctl.c */ 2954 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2955 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2956 int btrfs_ioctl_get_supported_features(void __user *arg); 2957 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 2958 int __pure btrfs_is_empty_uuid(u8 *uuid); 2959 int btrfs_defrag_file(struct inode *inode, struct file *file, 2960 struct btrfs_ioctl_defrag_range_args *range, 2961 u64 newer_than, unsigned long max_pages); 2962 void btrfs_get_block_group_info(struct list_head *groups_list, 2963 struct btrfs_ioctl_space_info *space); 2964 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 2965 struct btrfs_ioctl_balance_args *bargs); 2966 2967 /* file.c */ 2968 int __init btrfs_auto_defrag_init(void); 2969 void __cold btrfs_auto_defrag_exit(void); 2970 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 2971 struct btrfs_inode *inode); 2972 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 2973 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 2974 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 2975 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 2976 int skip_pinned); 2977 extern const struct file_operations btrfs_file_operations; 2978 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 2979 struct btrfs_root *root, struct inode *inode, 2980 struct btrfs_path *path, u64 start, u64 end, 2981 u64 *drop_end, int drop_cache, 2982 int replace_extent, 2983 u32 extent_item_size, 2984 int *key_inserted); 2985 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 2986 struct btrfs_root *root, struct inode *inode, u64 start, 2987 u64 end, int drop_cache); 2988 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, 2989 const u64 start, const u64 end, 2990 struct btrfs_clone_extent_info *clone_info, 2991 struct btrfs_trans_handle **trans_out); 2992 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2993 struct btrfs_inode *inode, u64 start, u64 end); 2994 int btrfs_release_file(struct inode *inode, struct file *file); 2995 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 2996 size_t num_pages, loff_t pos, size_t write_bytes, 2997 struct extent_state **cached); 2998 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 2999 loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, 3000 struct file *file_out, loff_t pos_out, 3001 loff_t len, unsigned int remap_flags); 3002 3003 /* tree-defrag.c */ 3004 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3005 struct btrfs_root *root); 3006 3007 /* super.c */ 3008 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3009 unsigned long new_flags); 3010 int btrfs_sync_fs(struct super_block *sb, int wait); 3011 3012 static inline __printf(2, 3) __cold 3013 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3014 { 3015 } 3016 3017 #ifdef CONFIG_PRINTK 3018 __printf(2, 3) 3019 __cold 3020 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3021 #else 3022 #define btrfs_printk(fs_info, fmt, args...) \ 3023 btrfs_no_printk(fs_info, fmt, ##args) 3024 #endif 3025 3026 #define btrfs_emerg(fs_info, fmt, args...) \ 3027 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3028 #define btrfs_alert(fs_info, fmt, args...) \ 3029 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3030 #define btrfs_crit(fs_info, fmt, args...) \ 3031 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3032 #define btrfs_err(fs_info, fmt, args...) \ 3033 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3034 #define btrfs_warn(fs_info, fmt, args...) \ 3035 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3036 #define btrfs_notice(fs_info, fmt, args...) \ 3037 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3038 #define btrfs_info(fs_info, fmt, args...) \ 3039 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3040 3041 /* 3042 * Wrappers that use printk_in_rcu 3043 */ 3044 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3045 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3046 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3047 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3048 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3049 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3050 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3051 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3052 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3053 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3054 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3055 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3056 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3057 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3058 3059 /* 3060 * Wrappers that use a ratelimited printk_in_rcu 3061 */ 3062 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3063 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3064 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3065 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3066 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3067 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3068 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3069 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3070 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3071 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3072 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3073 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3074 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3075 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3076 3077 /* 3078 * Wrappers that use a ratelimited printk 3079 */ 3080 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3081 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3082 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3083 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3084 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3085 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3086 #define btrfs_err_rl(fs_info, fmt, args...) \ 3087 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3088 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3089 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3090 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3091 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3092 #define btrfs_info_rl(fs_info, fmt, args...) \ 3093 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3094 3095 #if defined(CONFIG_DYNAMIC_DEBUG) 3096 #define btrfs_debug(fs_info, fmt, args...) \ 3097 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3098 fs_info, KERN_DEBUG fmt, ##args) 3099 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3100 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3101 fs_info, KERN_DEBUG fmt, ##args) 3102 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3103 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3104 fs_info, KERN_DEBUG fmt, ##args) 3105 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3106 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3107 fs_info, KERN_DEBUG fmt, ##args) 3108 #elif defined(DEBUG) 3109 #define btrfs_debug(fs_info, fmt, args...) \ 3110 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3111 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3112 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3113 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3114 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3115 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3116 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3117 #else 3118 #define btrfs_debug(fs_info, fmt, args...) \ 3119 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3120 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3121 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3122 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3123 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3124 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3125 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3126 #endif 3127 3128 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3129 do { \ 3130 rcu_read_lock(); \ 3131 btrfs_printk(fs_info, fmt, ##args); \ 3132 rcu_read_unlock(); \ 3133 } while (0) 3134 3135 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3136 do { \ 3137 rcu_read_lock(); \ 3138 btrfs_no_printk(fs_info, fmt, ##args); \ 3139 rcu_read_unlock(); \ 3140 } while (0) 3141 3142 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3143 do { \ 3144 static DEFINE_RATELIMIT_STATE(_rs, \ 3145 DEFAULT_RATELIMIT_INTERVAL, \ 3146 DEFAULT_RATELIMIT_BURST); \ 3147 if (__ratelimit(&_rs)) \ 3148 btrfs_printk(fs_info, fmt, ##args); \ 3149 } while (0) 3150 3151 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3152 do { \ 3153 rcu_read_lock(); \ 3154 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3155 rcu_read_unlock(); \ 3156 } while (0) 3157 3158 #ifdef CONFIG_BTRFS_ASSERT 3159 __cold __noreturn 3160 static inline void assertfail(const char *expr, const char *file, int line) 3161 { 3162 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3163 BUG(); 3164 } 3165 3166 #define ASSERT(expr) \ 3167 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3168 3169 #else 3170 static inline void assertfail(const char *expr, const char* file, int line) { } 3171 #define ASSERT(expr) (void)(expr) 3172 #endif 3173 3174 /* 3175 * Use that for functions that are conditionally exported for sanity tests but 3176 * otherwise static 3177 */ 3178 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3179 #define EXPORT_FOR_TESTS static 3180 #else 3181 #define EXPORT_FOR_TESTS 3182 #endif 3183 3184 __cold 3185 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3186 { 3187 btrfs_err(fs_info, 3188 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3189 } 3190 3191 __printf(5, 6) 3192 __cold 3193 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3194 unsigned int line, int errno, const char *fmt, ...); 3195 3196 const char * __attribute_const__ btrfs_decode_error(int errno); 3197 3198 __cold 3199 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3200 const char *function, 3201 unsigned int line, int errno); 3202 3203 /* 3204 * Call btrfs_abort_transaction as early as possible when an error condition is 3205 * detected, that way the exact line number is reported. 3206 */ 3207 #define btrfs_abort_transaction(trans, errno) \ 3208 do { \ 3209 /* Report first abort since mount */ \ 3210 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3211 &((trans)->fs_info->fs_state))) { \ 3212 if ((errno) != -EIO) { \ 3213 WARN(1, KERN_DEBUG \ 3214 "BTRFS: Transaction aborted (error %d)\n", \ 3215 (errno)); \ 3216 } else { \ 3217 btrfs_debug((trans)->fs_info, \ 3218 "Transaction aborted (error %d)", \ 3219 (errno)); \ 3220 } \ 3221 } \ 3222 __btrfs_abort_transaction((trans), __func__, \ 3223 __LINE__, (errno)); \ 3224 } while (0) 3225 3226 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3227 do { \ 3228 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3229 (errno), fmt, ##args); \ 3230 } while (0) 3231 3232 __printf(5, 6) 3233 __cold 3234 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3235 unsigned int line, int errno, const char *fmt, ...); 3236 /* 3237 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3238 * will panic(). Otherwise we BUG() here. 3239 */ 3240 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3241 do { \ 3242 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3243 BUG(); \ 3244 } while (0) 3245 3246 3247 /* compatibility and incompatibility defines */ 3248 3249 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3250 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3251 #opt) 3252 3253 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3254 u64 flag, const char* name) 3255 { 3256 struct btrfs_super_block *disk_super; 3257 u64 features; 3258 3259 disk_super = fs_info->super_copy; 3260 features = btrfs_super_incompat_flags(disk_super); 3261 if (!(features & flag)) { 3262 spin_lock(&fs_info->super_lock); 3263 features = btrfs_super_incompat_flags(disk_super); 3264 if (!(features & flag)) { 3265 features |= flag; 3266 btrfs_set_super_incompat_flags(disk_super, features); 3267 btrfs_info(fs_info, 3268 "setting incompat feature flag for %s (0x%llx)", 3269 name, flag); 3270 } 3271 spin_unlock(&fs_info->super_lock); 3272 } 3273 } 3274 3275 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3276 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3277 #opt) 3278 3279 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3280 u64 flag, const char* name) 3281 { 3282 struct btrfs_super_block *disk_super; 3283 u64 features; 3284 3285 disk_super = fs_info->super_copy; 3286 features = btrfs_super_incompat_flags(disk_super); 3287 if (features & flag) { 3288 spin_lock(&fs_info->super_lock); 3289 features = btrfs_super_incompat_flags(disk_super); 3290 if (features & flag) { 3291 features &= ~flag; 3292 btrfs_set_super_incompat_flags(disk_super, features); 3293 btrfs_info(fs_info, 3294 "clearing incompat feature flag for %s (0x%llx)", 3295 name, flag); 3296 } 3297 spin_unlock(&fs_info->super_lock); 3298 } 3299 } 3300 3301 #define btrfs_fs_incompat(fs_info, opt) \ 3302 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3303 3304 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3305 { 3306 struct btrfs_super_block *disk_super; 3307 disk_super = fs_info->super_copy; 3308 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3309 } 3310 3311 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3312 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3313 #opt) 3314 3315 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3316 u64 flag, const char *name) 3317 { 3318 struct btrfs_super_block *disk_super; 3319 u64 features; 3320 3321 disk_super = fs_info->super_copy; 3322 features = btrfs_super_compat_ro_flags(disk_super); 3323 if (!(features & flag)) { 3324 spin_lock(&fs_info->super_lock); 3325 features = btrfs_super_compat_ro_flags(disk_super); 3326 if (!(features & flag)) { 3327 features |= flag; 3328 btrfs_set_super_compat_ro_flags(disk_super, features); 3329 btrfs_info(fs_info, 3330 "setting compat-ro feature flag for %s (0x%llx)", 3331 name, flag); 3332 } 3333 spin_unlock(&fs_info->super_lock); 3334 } 3335 } 3336 3337 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3338 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3339 #opt) 3340 3341 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3342 u64 flag, const char *name) 3343 { 3344 struct btrfs_super_block *disk_super; 3345 u64 features; 3346 3347 disk_super = fs_info->super_copy; 3348 features = btrfs_super_compat_ro_flags(disk_super); 3349 if (features & flag) { 3350 spin_lock(&fs_info->super_lock); 3351 features = btrfs_super_compat_ro_flags(disk_super); 3352 if (features & flag) { 3353 features &= ~flag; 3354 btrfs_set_super_compat_ro_flags(disk_super, features); 3355 btrfs_info(fs_info, 3356 "clearing compat-ro feature flag for %s (0x%llx)", 3357 name, flag); 3358 } 3359 spin_unlock(&fs_info->super_lock); 3360 } 3361 } 3362 3363 #define btrfs_fs_compat_ro(fs_info, opt) \ 3364 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3365 3366 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3367 { 3368 struct btrfs_super_block *disk_super; 3369 disk_super = fs_info->super_copy; 3370 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3371 } 3372 3373 /* acl.c */ 3374 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3375 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3376 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3377 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3378 struct inode *inode, struct inode *dir); 3379 #else 3380 #define btrfs_get_acl NULL 3381 #define btrfs_set_acl NULL 3382 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3383 struct inode *inode, struct inode *dir) 3384 { 3385 return 0; 3386 } 3387 #endif 3388 3389 /* relocation.c */ 3390 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3391 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3392 struct btrfs_root *root); 3393 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3394 struct btrfs_root *root); 3395 int btrfs_recover_relocation(struct btrfs_root *root); 3396 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3397 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3398 struct btrfs_root *root, struct extent_buffer *buf, 3399 struct extent_buffer *cow); 3400 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3401 u64 *bytes_to_reserve); 3402 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3403 struct btrfs_pending_snapshot *pending); 3404 3405 /* scrub.c */ 3406 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3407 u64 end, struct btrfs_scrub_progress *progress, 3408 int readonly, int is_dev_replace); 3409 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3410 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3411 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3412 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3413 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3414 struct btrfs_scrub_progress *progress); 3415 static inline void btrfs_init_full_stripe_locks_tree( 3416 struct btrfs_full_stripe_locks_tree *locks_root) 3417 { 3418 locks_root->root = RB_ROOT; 3419 mutex_init(&locks_root->lock); 3420 } 3421 3422 /* dev-replace.c */ 3423 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3424 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3425 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3426 3427 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3428 { 3429 btrfs_bio_counter_sub(fs_info, 1); 3430 } 3431 3432 /* reada.c */ 3433 struct reada_control { 3434 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3435 struct btrfs_key key_start; 3436 struct btrfs_key key_end; /* exclusive */ 3437 atomic_t elems; 3438 struct kref refcnt; 3439 wait_queue_head_t wait; 3440 }; 3441 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3442 struct btrfs_key *start, struct btrfs_key *end); 3443 int btrfs_reada_wait(void *handle); 3444 void btrfs_reada_detach(void *handle); 3445 int btree_readahead_hook(struct extent_buffer *eb, int err); 3446 3447 static inline int is_fstree(u64 rootid) 3448 { 3449 if (rootid == BTRFS_FS_TREE_OBJECTID || 3450 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3451 !btrfs_qgroup_level(rootid))) 3452 return 1; 3453 return 0; 3454 } 3455 3456 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3457 { 3458 return signal_pending(current); 3459 } 3460 3461 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3462 3463 /* Sanity test specific functions */ 3464 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3465 void btrfs_test_inode_set_ops(struct inode *inode); 3466 void btrfs_test_destroy_inode(struct inode *inode); 3467 3468 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3469 { 3470 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3471 } 3472 #else 3473 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3474 { 3475 return 0; 3476 } 3477 #endif 3478 3479 #endif 3480