1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2007 Oracle. All rights reserved. 4 */ 5 6 #ifndef BTRFS_CTREE_H 7 #define BTRFS_CTREE_H 8 9 #include <linux/mm.h> 10 #include <linux/sched/signal.h> 11 #include <linux/highmem.h> 12 #include <linux/fs.h> 13 #include <linux/rwsem.h> 14 #include <linux/semaphore.h> 15 #include <linux/completion.h> 16 #include <linux/backing-dev.h> 17 #include <linux/wait.h> 18 #include <linux/slab.h> 19 #include <trace/events/btrfs.h> 20 #include <asm/kmap_types.h> 21 #include <asm/unaligned.h> 22 #include <linux/pagemap.h> 23 #include <linux/btrfs.h> 24 #include <linux/btrfs_tree.h> 25 #include <linux/workqueue.h> 26 #include <linux/security.h> 27 #include <linux/sizes.h> 28 #include <linux/dynamic_debug.h> 29 #include <linux/refcount.h> 30 #include <linux/crc32c.h> 31 #include "extent-io-tree.h" 32 #include "extent_io.h" 33 #include "extent_map.h" 34 #include "async-thread.h" 35 #include "block-rsv.h" 36 #include "locking.h" 37 38 struct btrfs_trans_handle; 39 struct btrfs_transaction; 40 struct btrfs_pending_snapshot; 41 struct btrfs_delayed_ref_root; 42 struct btrfs_space_info; 43 struct btrfs_block_group; 44 extern struct kmem_cache *btrfs_trans_handle_cachep; 45 extern struct kmem_cache *btrfs_bit_radix_cachep; 46 extern struct kmem_cache *btrfs_path_cachep; 47 extern struct kmem_cache *btrfs_free_space_cachep; 48 extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 49 struct btrfs_ordered_sum; 50 struct btrfs_ref; 51 52 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 53 54 /* 55 * Maximum number of mirrors that can be available for all profiles counting 56 * the target device of dev-replace as one. During an active device replace 57 * procedure, the target device of the copy operation is a mirror for the 58 * filesystem data as well that can be used to read data in order to repair 59 * read errors on other disks. 60 * 61 * Current value is derived from RAID1C4 with 4 copies. 62 */ 63 #define BTRFS_MAX_MIRRORS (4 + 1) 64 65 #define BTRFS_MAX_LEVEL 8 66 67 #define BTRFS_OLDEST_GENERATION 0ULL 68 69 /* 70 * the max metadata block size. This limit is somewhat artificial, 71 * but the memmove costs go through the roof for larger blocks. 72 */ 73 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 74 75 /* 76 * we can actually store much bigger names, but lets not confuse the rest 77 * of linux 78 */ 79 #define BTRFS_NAME_LEN 255 80 81 /* 82 * Theoretical limit is larger, but we keep this down to a sane 83 * value. That should limit greatly the possibility of collisions on 84 * inode ref items. 85 */ 86 #define BTRFS_LINK_MAX 65535U 87 88 #define BTRFS_EMPTY_DIR_SIZE 0 89 90 /* ioprio of readahead is set to idle */ 91 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 92 93 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 94 95 /* 96 * Use large batch size to reduce overhead of metadata updates. On the reader 97 * side, we only read it when we are close to ENOSPC and the read overhead is 98 * mostly related to the number of CPUs, so it is OK to use arbitrary large 99 * value here. 100 */ 101 #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M 102 103 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 104 105 /* 106 * Deltas are an effective way to populate global statistics. Give macro names 107 * to make it clear what we're doing. An example is discard_extents in 108 * btrfs_free_space_ctl. 109 */ 110 #define BTRFS_STAT_NR_ENTRIES 2 111 #define BTRFS_STAT_CURR 0 112 #define BTRFS_STAT_PREV 1 113 114 /* 115 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 116 */ 117 static inline u32 count_max_extents(u64 size) 118 { 119 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 120 } 121 122 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 123 { 124 BUG_ON(num_stripes == 0); 125 return sizeof(struct btrfs_chunk) + 126 sizeof(struct btrfs_stripe) * (num_stripes - 1); 127 } 128 129 /* 130 * Runtime (in-memory) states of filesystem 131 */ 132 enum { 133 /* Global indicator of serious filesystem errors */ 134 BTRFS_FS_STATE_ERROR, 135 /* 136 * Filesystem is being remounted, allow to skip some operations, like 137 * defrag 138 */ 139 BTRFS_FS_STATE_REMOUNTING, 140 /* Track if a transaction abort has been reported on this filesystem */ 141 BTRFS_FS_STATE_TRANS_ABORTED, 142 /* 143 * Bio operations should be blocked on this filesystem because a source 144 * or target device is being destroyed as part of a device replace 145 */ 146 BTRFS_FS_STATE_DEV_REPLACING, 147 /* The btrfs_fs_info created for self-tests */ 148 BTRFS_FS_STATE_DUMMY_FS_INFO, 149 }; 150 151 #define BTRFS_BACKREF_REV_MAX 256 152 #define BTRFS_BACKREF_REV_SHIFT 56 153 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 154 BTRFS_BACKREF_REV_SHIFT) 155 156 #define BTRFS_OLD_BACKREF_REV 0 157 #define BTRFS_MIXED_BACKREF_REV 1 158 159 /* 160 * every tree block (leaf or node) starts with this header. 161 */ 162 struct btrfs_header { 163 /* these first four must match the super block */ 164 u8 csum[BTRFS_CSUM_SIZE]; 165 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 166 __le64 bytenr; /* which block this node is supposed to live in */ 167 __le64 flags; 168 169 /* allowed to be different from the super from here on down */ 170 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 171 __le64 generation; 172 __le64 owner; 173 __le32 nritems; 174 u8 level; 175 } __attribute__ ((__packed__)); 176 177 /* 178 * this is a very generous portion of the super block, giving us 179 * room to translate 14 chunks with 3 stripes each. 180 */ 181 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 182 183 /* 184 * just in case we somehow lose the roots and are not able to mount, 185 * we store an array of the roots from previous transactions 186 * in the super. 187 */ 188 #define BTRFS_NUM_BACKUP_ROOTS 4 189 struct btrfs_root_backup { 190 __le64 tree_root; 191 __le64 tree_root_gen; 192 193 __le64 chunk_root; 194 __le64 chunk_root_gen; 195 196 __le64 extent_root; 197 __le64 extent_root_gen; 198 199 __le64 fs_root; 200 __le64 fs_root_gen; 201 202 __le64 dev_root; 203 __le64 dev_root_gen; 204 205 __le64 csum_root; 206 __le64 csum_root_gen; 207 208 __le64 total_bytes; 209 __le64 bytes_used; 210 __le64 num_devices; 211 /* future */ 212 __le64 unused_64[4]; 213 214 u8 tree_root_level; 215 u8 chunk_root_level; 216 u8 extent_root_level; 217 u8 fs_root_level; 218 u8 dev_root_level; 219 u8 csum_root_level; 220 /* future and to align */ 221 u8 unused_8[10]; 222 } __attribute__ ((__packed__)); 223 224 /* 225 * the super block basically lists the main trees of the FS 226 * it currently lacks any block count etc etc 227 */ 228 struct btrfs_super_block { 229 /* the first 4 fields must match struct btrfs_header */ 230 u8 csum[BTRFS_CSUM_SIZE]; 231 /* FS specific UUID, visible to user */ 232 u8 fsid[BTRFS_FSID_SIZE]; 233 __le64 bytenr; /* this block number */ 234 __le64 flags; 235 236 /* allowed to be different from the btrfs_header from here own down */ 237 __le64 magic; 238 __le64 generation; 239 __le64 root; 240 __le64 chunk_root; 241 __le64 log_root; 242 243 /* this will help find the new super based on the log root */ 244 __le64 log_root_transid; 245 __le64 total_bytes; 246 __le64 bytes_used; 247 __le64 root_dir_objectid; 248 __le64 num_devices; 249 __le32 sectorsize; 250 __le32 nodesize; 251 __le32 __unused_leafsize; 252 __le32 stripesize; 253 __le32 sys_chunk_array_size; 254 __le64 chunk_root_generation; 255 __le64 compat_flags; 256 __le64 compat_ro_flags; 257 __le64 incompat_flags; 258 __le16 csum_type; 259 u8 root_level; 260 u8 chunk_root_level; 261 u8 log_root_level; 262 struct btrfs_dev_item dev_item; 263 264 char label[BTRFS_LABEL_SIZE]; 265 266 __le64 cache_generation; 267 __le64 uuid_tree_generation; 268 269 /* the UUID written into btree blocks */ 270 u8 metadata_uuid[BTRFS_FSID_SIZE]; 271 272 /* future expansion */ 273 __le64 reserved[28]; 274 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 275 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 276 } __attribute__ ((__packed__)); 277 278 /* 279 * Compat flags that we support. If any incompat flags are set other than the 280 * ones specified below then we will fail to mount 281 */ 282 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 283 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 284 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 285 286 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 287 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 288 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 289 290 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 291 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 292 293 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 294 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 295 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 296 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 297 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 298 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 299 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 300 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 301 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 302 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 303 BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ 304 BTRFS_FEATURE_INCOMPAT_METADATA_UUID | \ 305 BTRFS_FEATURE_INCOMPAT_RAID1C34) 306 307 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 308 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 309 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 310 311 /* 312 * A leaf is full of items. offset and size tell us where to find 313 * the item in the leaf (relative to the start of the data area) 314 */ 315 struct btrfs_item { 316 struct btrfs_disk_key key; 317 __le32 offset; 318 __le32 size; 319 } __attribute__ ((__packed__)); 320 321 /* 322 * leaves have an item area and a data area: 323 * [item0, item1....itemN] [free space] [dataN...data1, data0] 324 * 325 * The data is separate from the items to get the keys closer together 326 * during searches. 327 */ 328 struct btrfs_leaf { 329 struct btrfs_header header; 330 struct btrfs_item items[]; 331 } __attribute__ ((__packed__)); 332 333 /* 334 * all non-leaf blocks are nodes, they hold only keys and pointers to 335 * other blocks 336 */ 337 struct btrfs_key_ptr { 338 struct btrfs_disk_key key; 339 __le64 blockptr; 340 __le64 generation; 341 } __attribute__ ((__packed__)); 342 343 struct btrfs_node { 344 struct btrfs_header header; 345 struct btrfs_key_ptr ptrs[]; 346 } __attribute__ ((__packed__)); 347 348 /* 349 * btrfs_paths remember the path taken from the root down to the leaf. 350 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 351 * to any other levels that are present. 352 * 353 * The slots array records the index of the item or block pointer 354 * used while walking the tree. 355 */ 356 enum { READA_NONE, READA_BACK, READA_FORWARD }; 357 struct btrfs_path { 358 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 359 int slots[BTRFS_MAX_LEVEL]; 360 /* if there is real range locking, this locks field will change */ 361 u8 locks[BTRFS_MAX_LEVEL]; 362 u8 reada; 363 /* keep some upper locks as we walk down */ 364 u8 lowest_level; 365 366 /* 367 * set by btrfs_split_item, tells search_slot to keep all locks 368 * and to force calls to keep space in the nodes 369 */ 370 unsigned int search_for_split:1; 371 unsigned int keep_locks:1; 372 unsigned int skip_locking:1; 373 unsigned int leave_spinning:1; 374 unsigned int search_commit_root:1; 375 unsigned int need_commit_sem:1; 376 unsigned int skip_release_on_error:1; 377 }; 378 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 379 sizeof(struct btrfs_item)) 380 struct btrfs_dev_replace { 381 u64 replace_state; /* see #define above */ 382 time64_t time_started; /* seconds since 1-Jan-1970 */ 383 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 384 atomic64_t num_write_errors; 385 atomic64_t num_uncorrectable_read_errors; 386 387 u64 cursor_left; 388 u64 committed_cursor_left; 389 u64 cursor_left_last_write_of_item; 390 u64 cursor_right; 391 392 u64 cont_reading_from_srcdev_mode; /* see #define above */ 393 394 int is_valid; 395 int item_needs_writeback; 396 struct btrfs_device *srcdev; 397 struct btrfs_device *tgtdev; 398 399 struct mutex lock_finishing_cancel_unmount; 400 struct rw_semaphore rwsem; 401 402 struct btrfs_scrub_progress scrub_progress; 403 404 struct percpu_counter bio_counter; 405 wait_queue_head_t replace_wait; 406 }; 407 408 /* 409 * free clusters are used to claim free space in relatively large chunks, 410 * allowing us to do less seeky writes. They are used for all metadata 411 * allocations. In ssd_spread mode they are also used for data allocations. 412 */ 413 struct btrfs_free_cluster { 414 spinlock_t lock; 415 spinlock_t refill_lock; 416 struct rb_root root; 417 418 /* largest extent in this cluster */ 419 u64 max_size; 420 421 /* first extent starting offset */ 422 u64 window_start; 423 424 /* We did a full search and couldn't create a cluster */ 425 bool fragmented; 426 427 struct btrfs_block_group *block_group; 428 /* 429 * when a cluster is allocated from a block group, we put the 430 * cluster onto a list in the block group so that it can 431 * be freed before the block group is freed. 432 */ 433 struct list_head block_group_list; 434 }; 435 436 enum btrfs_caching_type { 437 BTRFS_CACHE_NO, 438 BTRFS_CACHE_STARTED, 439 BTRFS_CACHE_FAST, 440 BTRFS_CACHE_FINISHED, 441 BTRFS_CACHE_ERROR, 442 }; 443 444 /* 445 * Tree to record all locked full stripes of a RAID5/6 block group 446 */ 447 struct btrfs_full_stripe_locks_tree { 448 struct rb_root root; 449 struct mutex lock; 450 }; 451 452 /* Discard control. */ 453 /* 454 * Async discard uses multiple lists to differentiate the discard filter 455 * parameters. Index 0 is for completely free block groups where we need to 456 * ensure the entire block group is trimmed without being lossy. Indices 457 * afterwards represent monotonically decreasing discard filter sizes to 458 * prioritize what should be discarded next. 459 */ 460 #define BTRFS_NR_DISCARD_LISTS 3 461 #define BTRFS_DISCARD_INDEX_UNUSED 0 462 #define BTRFS_DISCARD_INDEX_START 1 463 464 struct btrfs_discard_ctl { 465 struct workqueue_struct *discard_workers; 466 struct delayed_work work; 467 spinlock_t lock; 468 struct btrfs_block_group *block_group; 469 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 470 u64 prev_discard; 471 atomic_t discardable_extents; 472 atomic64_t discardable_bytes; 473 u64 max_discard_size; 474 unsigned long delay; 475 u32 iops_limit; 476 u32 kbps_limit; 477 u64 discard_extent_bytes; 478 u64 discard_bitmap_bytes; 479 atomic64_t discard_bytes_saved; 480 }; 481 482 /* delayed seq elem */ 483 struct seq_list { 484 struct list_head list; 485 u64 seq; 486 }; 487 488 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 489 490 #define SEQ_LAST ((u64)-1) 491 492 enum btrfs_orphan_cleanup_state { 493 ORPHAN_CLEANUP_STARTED = 1, 494 ORPHAN_CLEANUP_DONE = 2, 495 }; 496 497 void btrfs_init_async_reclaim_work(struct work_struct *work); 498 499 /* fs_info */ 500 struct reloc_control; 501 struct btrfs_device; 502 struct btrfs_fs_devices; 503 struct btrfs_balance_control; 504 struct btrfs_delayed_root; 505 506 /* 507 * Block group or device which contains an active swapfile. Used for preventing 508 * unsafe operations while a swapfile is active. 509 * 510 * These are sorted on (ptr, inode) (note that a block group or device can 511 * contain more than one swapfile). We compare the pointer values because we 512 * don't actually care what the object is, we just need a quick check whether 513 * the object exists in the rbtree. 514 */ 515 struct btrfs_swapfile_pin { 516 struct rb_node node; 517 void *ptr; 518 struct inode *inode; 519 /* 520 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 521 * points to a struct btrfs_device. 522 */ 523 bool is_block_group; 524 }; 525 526 bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); 527 528 enum { 529 BTRFS_FS_BARRIER, 530 BTRFS_FS_CLOSING_START, 531 BTRFS_FS_CLOSING_DONE, 532 BTRFS_FS_LOG_RECOVERING, 533 BTRFS_FS_OPEN, 534 BTRFS_FS_QUOTA_ENABLED, 535 BTRFS_FS_UPDATE_UUID_TREE_GEN, 536 BTRFS_FS_CREATING_FREE_SPACE_TREE, 537 BTRFS_FS_BTREE_ERR, 538 BTRFS_FS_LOG1_ERR, 539 BTRFS_FS_LOG2_ERR, 540 BTRFS_FS_QUOTA_OVERRIDE, 541 /* Used to record internally whether fs has been frozen */ 542 BTRFS_FS_FROZEN, 543 /* 544 * Indicate that a whole-filesystem exclusive operation is running 545 * (device replace, resize, device add/delete, balance) 546 */ 547 BTRFS_FS_EXCL_OP, 548 /* 549 * To info transaction_kthread we need an immediate commit so it 550 * doesn't need to wait for commit_interval 551 */ 552 BTRFS_FS_NEED_ASYNC_COMMIT, 553 /* 554 * Indicate that balance has been set up from the ioctl and is in the 555 * main phase. The fs_info::balance_ctl is initialized. 556 * Set and cleared while holding fs_info::balance_mutex. 557 */ 558 BTRFS_FS_BALANCE_RUNNING, 559 560 /* Indicate that the cleaner thread is awake and doing something. */ 561 BTRFS_FS_CLEANER_RUNNING, 562 563 /* 564 * The checksumming has an optimized version and is considered fast, 565 * so we don't need to offload checksums to workqueues. 566 */ 567 BTRFS_FS_CSUM_IMPL_FAST, 568 569 /* Indicate that the discard workqueue can service discards. */ 570 BTRFS_FS_DISCARD_RUNNING, 571 }; 572 573 struct btrfs_fs_info { 574 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 575 unsigned long flags; 576 struct btrfs_root *extent_root; 577 struct btrfs_root *tree_root; 578 struct btrfs_root *chunk_root; 579 struct btrfs_root *dev_root; 580 struct btrfs_root *fs_root; 581 struct btrfs_root *csum_root; 582 struct btrfs_root *quota_root; 583 struct btrfs_root *uuid_root; 584 struct btrfs_root *free_space_root; 585 586 /* the log root tree is a directory of all the other log roots */ 587 struct btrfs_root *log_root_tree; 588 589 spinlock_t fs_roots_radix_lock; 590 struct radix_tree_root fs_roots_radix; 591 592 /* block group cache stuff */ 593 spinlock_t block_group_cache_lock; 594 u64 first_logical_byte; 595 struct rb_root block_group_cache_tree; 596 597 /* keep track of unallocated space */ 598 atomic64_t free_chunk_space; 599 600 /* Track ranges which are used by log trees blocks/logged data extents */ 601 struct extent_io_tree excluded_extents; 602 603 /* logical->physical extent mapping */ 604 struct extent_map_tree mapping_tree; 605 606 /* 607 * block reservation for extent, checksum, root tree and 608 * delayed dir index item 609 */ 610 struct btrfs_block_rsv global_block_rsv; 611 /* block reservation for metadata operations */ 612 struct btrfs_block_rsv trans_block_rsv; 613 /* block reservation for chunk tree */ 614 struct btrfs_block_rsv chunk_block_rsv; 615 /* block reservation for delayed operations */ 616 struct btrfs_block_rsv delayed_block_rsv; 617 /* block reservation for delayed refs */ 618 struct btrfs_block_rsv delayed_refs_rsv; 619 620 struct btrfs_block_rsv empty_block_rsv; 621 622 u64 generation; 623 u64 last_trans_committed; 624 u64 avg_delayed_ref_runtime; 625 626 /* 627 * this is updated to the current trans every time a full commit 628 * is required instead of the faster short fsync log commits 629 */ 630 u64 last_trans_log_full_commit; 631 unsigned long mount_opt; 632 /* 633 * Track requests for actions that need to be done during transaction 634 * commit (like for some mount options). 635 */ 636 unsigned long pending_changes; 637 unsigned long compress_type:4; 638 unsigned int compress_level; 639 u32 commit_interval; 640 /* 641 * It is a suggestive number, the read side is safe even it gets a 642 * wrong number because we will write out the data into a regular 643 * extent. The write side(mount/remount) is under ->s_umount lock, 644 * so it is also safe. 645 */ 646 u64 max_inline; 647 648 struct btrfs_transaction *running_transaction; 649 wait_queue_head_t transaction_throttle; 650 wait_queue_head_t transaction_wait; 651 wait_queue_head_t transaction_blocked_wait; 652 wait_queue_head_t async_submit_wait; 653 654 /* 655 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 656 * when they are updated. 657 * 658 * Because we do not clear the flags for ever, so we needn't use 659 * the lock on the read side. 660 * 661 * We also needn't use the lock when we mount the fs, because 662 * there is no other task which will update the flag. 663 */ 664 spinlock_t super_lock; 665 struct btrfs_super_block *super_copy; 666 struct btrfs_super_block *super_for_commit; 667 struct super_block *sb; 668 struct inode *btree_inode; 669 struct mutex tree_log_mutex; 670 struct mutex transaction_kthread_mutex; 671 struct mutex cleaner_mutex; 672 struct mutex chunk_mutex; 673 674 /* 675 * this is taken to make sure we don't set block groups ro after 676 * the free space cache has been allocated on them 677 */ 678 struct mutex ro_block_group_mutex; 679 680 /* this is used during read/modify/write to make sure 681 * no two ios are trying to mod the same stripe at the same 682 * time 683 */ 684 struct btrfs_stripe_hash_table *stripe_hash_table; 685 686 /* 687 * this protects the ordered operations list only while we are 688 * processing all of the entries on it. This way we make 689 * sure the commit code doesn't find the list temporarily empty 690 * because another function happens to be doing non-waiting preflush 691 * before jumping into the main commit. 692 */ 693 struct mutex ordered_operations_mutex; 694 695 struct rw_semaphore commit_root_sem; 696 697 struct rw_semaphore cleanup_work_sem; 698 699 struct rw_semaphore subvol_sem; 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 struct list_head allocated_roots; 951 952 spinlock_t eb_leak_lock; 953 struct list_head allocated_ebs; 954 #endif 955 }; 956 957 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 958 { 959 return sb->s_fs_info; 960 } 961 962 /* 963 * The state of btrfs root 964 */ 965 enum { 966 /* 967 * btrfs_record_root_in_trans is a multi-step process, and it can race 968 * with the balancing code. But the race is very small, and only the 969 * first time the root is added to each transaction. So IN_TRANS_SETUP 970 * is used to tell us when more checks are required 971 */ 972 BTRFS_ROOT_IN_TRANS_SETUP, 973 BTRFS_ROOT_REF_COWS, 974 BTRFS_ROOT_TRACK_DIRTY, 975 BTRFS_ROOT_IN_RADIX, 976 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 977 BTRFS_ROOT_DEFRAG_RUNNING, 978 BTRFS_ROOT_FORCE_COW, 979 BTRFS_ROOT_MULTI_LOG_TASKS, 980 BTRFS_ROOT_DIRTY, 981 BTRFS_ROOT_DELETING, 982 983 /* 984 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 985 * 986 * Set for the subvolume tree owning the reloc tree. 987 */ 988 BTRFS_ROOT_DEAD_RELOC_TREE, 989 /* Mark dead root stored on device whose cleanup needs to be resumed */ 990 BTRFS_ROOT_DEAD_TREE, 991 }; 992 993 /* 994 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 995 * code. For detail check comment in fs/btrfs/qgroup.c. 996 */ 997 struct btrfs_qgroup_swapped_blocks { 998 spinlock_t lock; 999 /* RM_EMPTY_ROOT() of above blocks[] */ 1000 bool swapped; 1001 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1002 }; 1003 1004 /* 1005 * in ram representation of the tree. extent_root is used for all allocations 1006 * and for the extent tree extent_root root. 1007 */ 1008 struct btrfs_root { 1009 struct extent_buffer *node; 1010 1011 struct extent_buffer *commit_root; 1012 struct btrfs_root *log_root; 1013 struct btrfs_root *reloc_root; 1014 1015 unsigned long state; 1016 struct btrfs_root_item root_item; 1017 struct btrfs_key root_key; 1018 struct btrfs_fs_info *fs_info; 1019 struct extent_io_tree dirty_log_pages; 1020 1021 struct mutex objectid_mutex; 1022 1023 spinlock_t accounting_lock; 1024 struct btrfs_block_rsv *block_rsv; 1025 1026 /* free ino cache stuff */ 1027 struct btrfs_free_space_ctl *free_ino_ctl; 1028 enum btrfs_caching_type ino_cache_state; 1029 spinlock_t ino_cache_lock; 1030 wait_queue_head_t ino_cache_wait; 1031 struct btrfs_free_space_ctl *free_ino_pinned; 1032 u64 ino_cache_progress; 1033 struct inode *ino_cache_inode; 1034 1035 struct mutex log_mutex; 1036 wait_queue_head_t log_writer_wait; 1037 wait_queue_head_t log_commit_wait[2]; 1038 struct list_head log_ctxs[2]; 1039 atomic_t log_writers; 1040 atomic_t log_commit[2]; 1041 atomic_t log_batch; 1042 int log_transid; 1043 /* No matter the commit succeeds or not*/ 1044 int log_transid_committed; 1045 /* Just be updated when the commit succeeds. */ 1046 int last_log_commit; 1047 pid_t log_start_pid; 1048 1049 u64 last_trans; 1050 1051 u32 type; 1052 1053 u64 highest_objectid; 1054 1055 u64 defrag_trans_start; 1056 struct btrfs_key defrag_progress; 1057 struct btrfs_key defrag_max; 1058 1059 /* the dirty list is only used by non-reference counted roots */ 1060 struct list_head dirty_list; 1061 1062 struct list_head root_list; 1063 1064 spinlock_t log_extents_lock[2]; 1065 struct list_head logged_list[2]; 1066 1067 int orphan_cleanup_state; 1068 1069 spinlock_t inode_lock; 1070 /* red-black tree that keeps track of in-memory inodes */ 1071 struct rb_root inode_tree; 1072 1073 /* 1074 * radix tree that keeps track of delayed nodes of every inode, 1075 * protected by inode_lock 1076 */ 1077 struct radix_tree_root delayed_nodes_tree; 1078 /* 1079 * right now this just gets used so that a root has its own devid 1080 * for stat. It may be used for more later 1081 */ 1082 dev_t anon_dev; 1083 1084 spinlock_t root_item_lock; 1085 refcount_t refs; 1086 1087 struct mutex delalloc_mutex; 1088 spinlock_t delalloc_lock; 1089 /* 1090 * all of the inodes that have delalloc bytes. It is possible for 1091 * this list to be empty even when there is still dirty data=ordered 1092 * extents waiting to finish IO. 1093 */ 1094 struct list_head delalloc_inodes; 1095 struct list_head delalloc_root; 1096 u64 nr_delalloc_inodes; 1097 1098 struct mutex ordered_extent_mutex; 1099 /* 1100 * this is used by the balancing code to wait for all the pending 1101 * ordered extents 1102 */ 1103 spinlock_t ordered_extent_lock; 1104 1105 /* 1106 * all of the data=ordered extents pending writeback 1107 * these can span multiple transactions and basically include 1108 * every dirty data page that isn't from nodatacow 1109 */ 1110 struct list_head ordered_extents; 1111 struct list_head ordered_root; 1112 u64 nr_ordered_extents; 1113 1114 /* 1115 * Not empty if this subvolume root has gone through tree block swap 1116 * (relocation) 1117 * 1118 * Will be used by reloc_control::dirty_subvol_roots. 1119 */ 1120 struct list_head reloc_dirty_list; 1121 1122 /* 1123 * Number of currently running SEND ioctls to prevent 1124 * manipulation with the read-only status via SUBVOL_SETFLAGS 1125 */ 1126 int send_in_progress; 1127 /* 1128 * Number of currently running deduplication operations that have a 1129 * destination inode belonging to this root. Protected by the lock 1130 * root_item_lock. 1131 */ 1132 int dedupe_in_progress; 1133 /* For exclusion of snapshot creation and nocow writes */ 1134 struct btrfs_drew_lock snapshot_lock; 1135 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 #ifdef CONFIG_BTRFS_DEBUG 1154 struct list_head leak_list; 1155 #endif 1156 }; 1157 1158 struct btrfs_clone_extent_info { 1159 u64 disk_offset; 1160 u64 disk_len; 1161 u64 data_offset; 1162 u64 data_len; 1163 u64 file_offset; 1164 char *extent_buf; 1165 u32 item_size; 1166 }; 1167 1168 struct btrfs_file_private { 1169 void *filldir_buf; 1170 }; 1171 1172 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1173 { 1174 return btrfs_sb(inode->i_sb)->sectorsize; 1175 } 1176 1177 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1178 { 1179 1180 return info->nodesize - sizeof(struct btrfs_header); 1181 } 1182 1183 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1184 1185 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1186 { 1187 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1188 } 1189 1190 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1191 { 1192 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1193 } 1194 1195 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1196 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1197 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1198 { 1199 return BTRFS_MAX_ITEM_SIZE(info) - 1200 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1201 } 1202 1203 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1204 { 1205 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1206 } 1207 1208 /* 1209 * Flags for mount options. 1210 * 1211 * Note: don't forget to add new options to btrfs_show_options() 1212 */ 1213 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1214 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1215 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1216 #define BTRFS_MOUNT_SSD (1 << 3) 1217 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1218 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1219 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1220 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1221 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1222 #define BTRFS_MOUNT_NOSSD (1 << 9) 1223 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1224 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1225 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1226 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1227 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1228 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1229 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1230 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1231 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1232 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1233 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1234 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1235 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1236 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1237 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1238 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1239 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1240 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1241 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1242 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1243 1244 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1245 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1246 1247 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1248 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1249 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1250 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1251 BTRFS_MOUNT_##opt) 1252 1253 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1254 { \ 1255 if (!btrfs_test_opt(fs_info, opt)) \ 1256 btrfs_info(fs_info, fmt, ##args); \ 1257 btrfs_set_opt(fs_info->mount_opt, opt); \ 1258 } 1259 1260 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1261 { \ 1262 if (btrfs_test_opt(fs_info, opt)) \ 1263 btrfs_info(fs_info, fmt, ##args); \ 1264 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1265 } 1266 1267 /* 1268 * Requests for changes that need to be done during transaction commit. 1269 * 1270 * Internal mount options that are used for special handling of the real 1271 * mount options (eg. cannot be set during remount and have to be set during 1272 * transaction commit) 1273 */ 1274 1275 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1276 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1277 #define BTRFS_PENDING_COMMIT (2) 1278 1279 #define btrfs_test_pending(info, opt) \ 1280 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1281 #define btrfs_set_pending(info, opt) \ 1282 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1283 #define btrfs_clear_pending(info, opt) \ 1284 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1285 1286 /* 1287 * Helpers for setting pending mount option changes. 1288 * 1289 * Expects corresponding macros 1290 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1291 */ 1292 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1293 do { \ 1294 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1295 btrfs_info((info), fmt, ##args); \ 1296 btrfs_set_pending((info), SET_##opt); \ 1297 btrfs_clear_pending((info), CLEAR_##opt); \ 1298 } \ 1299 } while(0) 1300 1301 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1302 do { \ 1303 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1304 btrfs_info((info), fmt, ##args); \ 1305 btrfs_set_pending((info), CLEAR_##opt); \ 1306 btrfs_clear_pending((info), SET_##opt); \ 1307 } \ 1308 } while(0) 1309 1310 /* 1311 * Inode flags 1312 */ 1313 #define BTRFS_INODE_NODATASUM (1 << 0) 1314 #define BTRFS_INODE_NODATACOW (1 << 1) 1315 #define BTRFS_INODE_READONLY (1 << 2) 1316 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1317 #define BTRFS_INODE_PREALLOC (1 << 4) 1318 #define BTRFS_INODE_SYNC (1 << 5) 1319 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1320 #define BTRFS_INODE_APPEND (1 << 7) 1321 #define BTRFS_INODE_NODUMP (1 << 8) 1322 #define BTRFS_INODE_NOATIME (1 << 9) 1323 #define BTRFS_INODE_DIRSYNC (1 << 10) 1324 #define BTRFS_INODE_COMPRESS (1 << 11) 1325 1326 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1327 1328 #define BTRFS_INODE_FLAG_MASK \ 1329 (BTRFS_INODE_NODATASUM | \ 1330 BTRFS_INODE_NODATACOW | \ 1331 BTRFS_INODE_READONLY | \ 1332 BTRFS_INODE_NOCOMPRESS | \ 1333 BTRFS_INODE_PREALLOC | \ 1334 BTRFS_INODE_SYNC | \ 1335 BTRFS_INODE_IMMUTABLE | \ 1336 BTRFS_INODE_APPEND | \ 1337 BTRFS_INODE_NODUMP | \ 1338 BTRFS_INODE_NOATIME | \ 1339 BTRFS_INODE_DIRSYNC | \ 1340 BTRFS_INODE_COMPRESS | \ 1341 BTRFS_INODE_ROOT_ITEM_INIT) 1342 1343 struct btrfs_map_token { 1344 const struct extent_buffer *eb; 1345 char *kaddr; 1346 unsigned long offset; 1347 }; 1348 1349 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1350 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1351 1352 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1353 struct extent_buffer *eb) 1354 { 1355 token->eb = eb; 1356 token->kaddr = NULL; 1357 } 1358 1359 /* some macros to generate set/get functions for the struct fields. This 1360 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1361 * one for u8: 1362 */ 1363 #define le8_to_cpu(v) (v) 1364 #define cpu_to_le8(v) (v) 1365 #define __le8 u8 1366 1367 #define read_eb_member(eb, ptr, type, member, result) (\ 1368 read_extent_buffer(eb, (char *)(result), \ 1369 ((unsigned long)(ptr)) + \ 1370 offsetof(type, member), \ 1371 sizeof(((type *)0)->member))) 1372 1373 #define write_eb_member(eb, ptr, type, member, result) (\ 1374 write_extent_buffer(eb, (char *)(result), \ 1375 ((unsigned long)(ptr)) + \ 1376 offsetof(type, member), \ 1377 sizeof(((type *)0)->member))) 1378 1379 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1380 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1381 const void *ptr, unsigned long off, \ 1382 struct btrfs_map_token *token); \ 1383 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1384 unsigned long off, u##bits val, \ 1385 struct btrfs_map_token *token); \ 1386 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1387 const void *ptr, unsigned long off); \ 1388 void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1389 unsigned long off, u##bits val); 1390 1391 DECLARE_BTRFS_SETGET_BITS(8) 1392 DECLARE_BTRFS_SETGET_BITS(16) 1393 DECLARE_BTRFS_SETGET_BITS(32) 1394 DECLARE_BTRFS_SETGET_BITS(64) 1395 1396 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1397 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1398 const type *s) \ 1399 { \ 1400 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1401 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1402 } \ 1403 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1404 u##bits val) \ 1405 { \ 1406 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1407 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1408 } \ 1409 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1410 const type *s, \ 1411 struct btrfs_map_token *token) \ 1412 { \ 1413 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1414 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1415 } \ 1416 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1417 type *s, u##bits val, \ 1418 struct btrfs_map_token *token) \ 1419 { \ 1420 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1421 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1422 } 1423 1424 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1425 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1426 { \ 1427 const type *p = page_address(eb->pages[0]); \ 1428 u##bits res = le##bits##_to_cpu(p->member); \ 1429 return res; \ 1430 } \ 1431 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1432 u##bits val) \ 1433 { \ 1434 type *p = page_address(eb->pages[0]); \ 1435 p->member = cpu_to_le##bits(val); \ 1436 } 1437 1438 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1439 static inline u##bits btrfs_##name(const type *s) \ 1440 { \ 1441 return le##bits##_to_cpu(s->member); \ 1442 } \ 1443 static inline void btrfs_set_##name(type *s, u##bits val) \ 1444 { \ 1445 s->member = cpu_to_le##bits(val); \ 1446 } 1447 1448 1449 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1450 struct btrfs_dev_item *s) 1451 { 1452 BUILD_BUG_ON(sizeof(u64) != 1453 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1454 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1455 total_bytes)); 1456 } 1457 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1458 struct btrfs_dev_item *s, 1459 u64 val) 1460 { 1461 BUILD_BUG_ON(sizeof(u64) != 1462 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1463 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1464 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1465 } 1466 1467 1468 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1469 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1470 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1471 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1472 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1473 start_offset, 64); 1474 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1475 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1476 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1477 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1478 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1479 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1480 1481 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1482 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1483 total_bytes, 64); 1484 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1485 bytes_used, 64); 1486 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1487 io_align, 32); 1488 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1489 io_width, 32); 1490 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1491 sector_size, 32); 1492 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1493 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1494 dev_group, 32); 1495 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1496 seek_speed, 8); 1497 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1498 bandwidth, 8); 1499 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1500 generation, 64); 1501 1502 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1503 { 1504 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1505 } 1506 1507 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1508 { 1509 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1510 } 1511 1512 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1513 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1514 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1515 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1516 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1517 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1518 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1519 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1520 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1521 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1522 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1523 1524 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1525 { 1526 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1527 } 1528 1529 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1530 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1531 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1532 stripe_len, 64); 1533 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1534 io_align, 32); 1535 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1536 io_width, 32); 1537 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1538 sector_size, 32); 1539 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1540 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1541 num_stripes, 16); 1542 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1543 sub_stripes, 16); 1544 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1545 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1546 1547 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1548 int nr) 1549 { 1550 unsigned long offset = (unsigned long)c; 1551 offset += offsetof(struct btrfs_chunk, stripe); 1552 offset += nr * sizeof(struct btrfs_stripe); 1553 return (struct btrfs_stripe *)offset; 1554 } 1555 1556 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1557 { 1558 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1559 } 1560 1561 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1562 struct btrfs_chunk *c, int nr) 1563 { 1564 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1565 } 1566 1567 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1568 struct btrfs_chunk *c, int nr) 1569 { 1570 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1571 } 1572 1573 /* struct btrfs_block_group_item */ 1574 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1575 used, 64); 1576 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1577 used, 64); 1578 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1579 struct btrfs_block_group_item, chunk_objectid, 64); 1580 1581 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1582 struct btrfs_block_group_item, chunk_objectid, 64); 1583 BTRFS_SETGET_FUNCS(block_group_flags, 1584 struct btrfs_block_group_item, flags, 64); 1585 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1586 struct btrfs_block_group_item, flags, 64); 1587 1588 /* struct btrfs_free_space_info */ 1589 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1590 extent_count, 32); 1591 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1592 1593 /* struct btrfs_inode_ref */ 1594 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1595 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1596 1597 /* struct btrfs_inode_extref */ 1598 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1599 parent_objectid, 64); 1600 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1601 name_len, 16); 1602 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1603 1604 /* struct btrfs_inode_item */ 1605 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1606 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1607 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1608 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1609 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1610 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1611 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1612 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1613 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1614 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1615 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1616 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1617 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1618 generation, 64); 1619 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1620 sequence, 64); 1621 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1622 transid, 64); 1623 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1624 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1625 nbytes, 64); 1626 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1627 block_group, 64); 1628 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1629 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1630 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1631 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1632 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1633 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1634 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1635 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1636 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1637 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1638 1639 /* struct btrfs_dev_extent */ 1640 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1641 chunk_tree, 64); 1642 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1643 chunk_objectid, 64); 1644 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1645 chunk_offset, 64); 1646 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1647 1648 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1649 { 1650 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1651 return (unsigned long)dev + ptr; 1652 } 1653 1654 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1655 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1656 generation, 64); 1657 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1658 1659 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1660 1661 1662 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1663 1664 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1665 struct btrfs_tree_block_info *item, 1666 struct btrfs_disk_key *key) 1667 { 1668 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1669 } 1670 1671 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1672 struct btrfs_tree_block_info *item, 1673 struct btrfs_disk_key *key) 1674 { 1675 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1676 } 1677 1678 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1679 root, 64); 1680 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1681 objectid, 64); 1682 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1683 offset, 64); 1684 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1685 count, 32); 1686 1687 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1688 count, 32); 1689 1690 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1691 type, 8); 1692 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1693 offset, 64); 1694 1695 static inline u32 btrfs_extent_inline_ref_size(int type) 1696 { 1697 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1698 type == BTRFS_SHARED_BLOCK_REF_KEY) 1699 return sizeof(struct btrfs_extent_inline_ref); 1700 if (type == BTRFS_SHARED_DATA_REF_KEY) 1701 return sizeof(struct btrfs_shared_data_ref) + 1702 sizeof(struct btrfs_extent_inline_ref); 1703 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1704 return sizeof(struct btrfs_extent_data_ref) + 1705 offsetof(struct btrfs_extent_inline_ref, offset); 1706 return 0; 1707 } 1708 1709 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1710 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1711 generation, 64); 1712 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1713 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1714 1715 /* struct btrfs_node */ 1716 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1717 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1718 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1719 blockptr, 64); 1720 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1721 generation, 64); 1722 1723 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1724 { 1725 unsigned long ptr; 1726 ptr = offsetof(struct btrfs_node, ptrs) + 1727 sizeof(struct btrfs_key_ptr) * nr; 1728 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1729 } 1730 1731 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1732 int nr, u64 val) 1733 { 1734 unsigned long ptr; 1735 ptr = offsetof(struct btrfs_node, ptrs) + 1736 sizeof(struct btrfs_key_ptr) * nr; 1737 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1738 } 1739 1740 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1741 { 1742 unsigned long ptr; 1743 ptr = offsetof(struct btrfs_node, ptrs) + 1744 sizeof(struct btrfs_key_ptr) * nr; 1745 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1746 } 1747 1748 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1749 int nr, u64 val) 1750 { 1751 unsigned long ptr; 1752 ptr = offsetof(struct btrfs_node, ptrs) + 1753 sizeof(struct btrfs_key_ptr) * nr; 1754 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1755 } 1756 1757 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1758 { 1759 return offsetof(struct btrfs_node, ptrs) + 1760 sizeof(struct btrfs_key_ptr) * nr; 1761 } 1762 1763 void btrfs_node_key(const struct extent_buffer *eb, 1764 struct btrfs_disk_key *disk_key, int nr); 1765 1766 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1767 struct btrfs_disk_key *disk_key, int nr) 1768 { 1769 unsigned long ptr; 1770 ptr = btrfs_node_key_ptr_offset(nr); 1771 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1772 struct btrfs_key_ptr, key, disk_key); 1773 } 1774 1775 /* struct btrfs_item */ 1776 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1777 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1778 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1779 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1780 1781 static inline unsigned long btrfs_item_nr_offset(int nr) 1782 { 1783 return offsetof(struct btrfs_leaf, items) + 1784 sizeof(struct btrfs_item) * nr; 1785 } 1786 1787 static inline struct btrfs_item *btrfs_item_nr(int nr) 1788 { 1789 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1790 } 1791 1792 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1793 struct btrfs_item *item) 1794 { 1795 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1796 } 1797 1798 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1799 { 1800 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1801 } 1802 1803 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1804 { 1805 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1806 } 1807 1808 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1809 { 1810 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1811 } 1812 1813 static inline void btrfs_item_key(const struct extent_buffer *eb, 1814 struct btrfs_disk_key *disk_key, int nr) 1815 { 1816 struct btrfs_item *item = btrfs_item_nr(nr); 1817 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1818 } 1819 1820 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1821 struct btrfs_disk_key *disk_key, int nr) 1822 { 1823 struct btrfs_item *item = btrfs_item_nr(nr); 1824 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1825 } 1826 1827 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1828 1829 /* 1830 * struct btrfs_root_ref 1831 */ 1832 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1833 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1834 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1835 1836 /* struct btrfs_dir_item */ 1837 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1838 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1839 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1840 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1841 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1842 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1843 data_len, 16); 1844 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1845 name_len, 16); 1846 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1847 transid, 64); 1848 1849 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1850 const struct btrfs_dir_item *item, 1851 struct btrfs_disk_key *key) 1852 { 1853 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1854 } 1855 1856 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1857 struct btrfs_dir_item *item, 1858 const struct btrfs_disk_key *key) 1859 { 1860 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1861 } 1862 1863 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1864 num_entries, 64); 1865 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1866 num_bitmaps, 64); 1867 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1868 generation, 64); 1869 1870 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1871 const struct btrfs_free_space_header *h, 1872 struct btrfs_disk_key *key) 1873 { 1874 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1875 } 1876 1877 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1878 struct btrfs_free_space_header *h, 1879 const struct btrfs_disk_key *key) 1880 { 1881 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1882 } 1883 1884 /* struct btrfs_disk_key */ 1885 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1886 objectid, 64); 1887 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1888 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1889 1890 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1891 const struct btrfs_disk_key *disk) 1892 { 1893 cpu->offset = le64_to_cpu(disk->offset); 1894 cpu->type = disk->type; 1895 cpu->objectid = le64_to_cpu(disk->objectid); 1896 } 1897 1898 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1899 const struct btrfs_key *cpu) 1900 { 1901 disk->offset = cpu_to_le64(cpu->offset); 1902 disk->type = cpu->type; 1903 disk->objectid = cpu_to_le64(cpu->objectid); 1904 } 1905 1906 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1907 struct btrfs_key *key, int nr) 1908 { 1909 struct btrfs_disk_key disk_key; 1910 btrfs_node_key(eb, &disk_key, nr); 1911 btrfs_disk_key_to_cpu(key, &disk_key); 1912 } 1913 1914 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1915 struct btrfs_key *key, int nr) 1916 { 1917 struct btrfs_disk_key disk_key; 1918 btrfs_item_key(eb, &disk_key, nr); 1919 btrfs_disk_key_to_cpu(key, &disk_key); 1920 } 1921 1922 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1923 const struct btrfs_dir_item *item, 1924 struct btrfs_key *key) 1925 { 1926 struct btrfs_disk_key disk_key; 1927 btrfs_dir_item_key(eb, item, &disk_key); 1928 btrfs_disk_key_to_cpu(key, &disk_key); 1929 } 1930 1931 /* struct btrfs_header */ 1932 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1933 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1934 generation, 64); 1935 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1936 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1937 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1938 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1939 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 1940 generation, 64); 1941 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 1942 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 1943 nritems, 32); 1944 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 1945 1946 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 1947 { 1948 return (btrfs_header_flags(eb) & flag) == flag; 1949 } 1950 1951 static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1952 { 1953 u64 flags = btrfs_header_flags(eb); 1954 btrfs_set_header_flags(eb, flags | flag); 1955 } 1956 1957 static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1958 { 1959 u64 flags = btrfs_header_flags(eb); 1960 btrfs_set_header_flags(eb, flags & ~flag); 1961 } 1962 1963 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 1964 { 1965 u64 flags = btrfs_header_flags(eb); 1966 return flags >> BTRFS_BACKREF_REV_SHIFT; 1967 } 1968 1969 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1970 int rev) 1971 { 1972 u64 flags = btrfs_header_flags(eb); 1973 flags &= ~BTRFS_BACKREF_REV_MASK; 1974 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1975 btrfs_set_header_flags(eb, flags); 1976 } 1977 1978 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 1979 { 1980 return btrfs_header_level(eb) == 0; 1981 } 1982 1983 /* struct btrfs_root_item */ 1984 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1985 generation, 64); 1986 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1987 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1988 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1989 1990 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1991 generation, 64); 1992 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1993 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 1994 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 1995 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 1996 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 1997 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 1998 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 1999 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2000 last_snapshot, 64); 2001 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2002 generation_v2, 64); 2003 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2004 ctransid, 64); 2005 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2006 otransid, 64); 2007 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2008 stransid, 64); 2009 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2010 rtransid, 64); 2011 2012 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2013 { 2014 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2015 } 2016 2017 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2018 { 2019 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2020 } 2021 2022 /* struct btrfs_root_backup */ 2023 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2024 tree_root, 64); 2025 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2026 tree_root_gen, 64); 2027 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2028 tree_root_level, 8); 2029 2030 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2031 chunk_root, 64); 2032 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2033 chunk_root_gen, 64); 2034 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2035 chunk_root_level, 8); 2036 2037 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2038 extent_root, 64); 2039 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2040 extent_root_gen, 64); 2041 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2042 extent_root_level, 8); 2043 2044 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2045 fs_root, 64); 2046 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2047 fs_root_gen, 64); 2048 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2049 fs_root_level, 8); 2050 2051 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2052 dev_root, 64); 2053 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2054 dev_root_gen, 64); 2055 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2056 dev_root_level, 8); 2057 2058 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2059 csum_root, 64); 2060 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2061 csum_root_gen, 64); 2062 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2063 csum_root_level, 8); 2064 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2065 total_bytes, 64); 2066 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2067 bytes_used, 64); 2068 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2069 num_devices, 64); 2070 2071 /* struct btrfs_balance_item */ 2072 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2073 2074 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2075 const struct btrfs_balance_item *bi, 2076 struct btrfs_disk_balance_args *ba) 2077 { 2078 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2079 } 2080 2081 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2082 struct btrfs_balance_item *bi, 2083 const struct btrfs_disk_balance_args *ba) 2084 { 2085 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2086 } 2087 2088 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2089 const struct btrfs_balance_item *bi, 2090 struct btrfs_disk_balance_args *ba) 2091 { 2092 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2093 } 2094 2095 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2096 struct btrfs_balance_item *bi, 2097 const struct btrfs_disk_balance_args *ba) 2098 { 2099 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2100 } 2101 2102 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2103 const struct btrfs_balance_item *bi, 2104 struct btrfs_disk_balance_args *ba) 2105 { 2106 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2107 } 2108 2109 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2110 struct btrfs_balance_item *bi, 2111 const struct btrfs_disk_balance_args *ba) 2112 { 2113 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2114 } 2115 2116 static inline void 2117 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2118 const struct btrfs_disk_balance_args *disk) 2119 { 2120 memset(cpu, 0, sizeof(*cpu)); 2121 2122 cpu->profiles = le64_to_cpu(disk->profiles); 2123 cpu->usage = le64_to_cpu(disk->usage); 2124 cpu->devid = le64_to_cpu(disk->devid); 2125 cpu->pstart = le64_to_cpu(disk->pstart); 2126 cpu->pend = le64_to_cpu(disk->pend); 2127 cpu->vstart = le64_to_cpu(disk->vstart); 2128 cpu->vend = le64_to_cpu(disk->vend); 2129 cpu->target = le64_to_cpu(disk->target); 2130 cpu->flags = le64_to_cpu(disk->flags); 2131 cpu->limit = le64_to_cpu(disk->limit); 2132 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2133 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2134 } 2135 2136 static inline void 2137 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2138 const struct btrfs_balance_args *cpu) 2139 { 2140 memset(disk, 0, sizeof(*disk)); 2141 2142 disk->profiles = cpu_to_le64(cpu->profiles); 2143 disk->usage = cpu_to_le64(cpu->usage); 2144 disk->devid = cpu_to_le64(cpu->devid); 2145 disk->pstart = cpu_to_le64(cpu->pstart); 2146 disk->pend = cpu_to_le64(cpu->pend); 2147 disk->vstart = cpu_to_le64(cpu->vstart); 2148 disk->vend = cpu_to_le64(cpu->vend); 2149 disk->target = cpu_to_le64(cpu->target); 2150 disk->flags = cpu_to_le64(cpu->flags); 2151 disk->limit = cpu_to_le64(cpu->limit); 2152 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2153 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2154 } 2155 2156 /* struct btrfs_super_block */ 2157 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2158 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2159 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2160 generation, 64); 2161 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2162 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2163 struct btrfs_super_block, sys_chunk_array_size, 32); 2164 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2165 struct btrfs_super_block, chunk_root_generation, 64); 2166 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2167 root_level, 8); 2168 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2169 chunk_root, 64); 2170 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2171 chunk_root_level, 8); 2172 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2173 log_root, 64); 2174 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2175 log_root_transid, 64); 2176 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2177 log_root_level, 8); 2178 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2179 total_bytes, 64); 2180 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2181 bytes_used, 64); 2182 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2183 sectorsize, 32); 2184 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2185 nodesize, 32); 2186 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2187 stripesize, 32); 2188 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2189 root_dir_objectid, 64); 2190 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2191 num_devices, 64); 2192 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2193 compat_flags, 64); 2194 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2195 compat_ro_flags, 64); 2196 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2197 incompat_flags, 64); 2198 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2199 csum_type, 16); 2200 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2201 cache_generation, 64); 2202 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2203 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2204 uuid_tree_generation, 64); 2205 2206 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2207 const char *btrfs_super_csum_name(u16 csum_type); 2208 const char *btrfs_super_csum_driver(u16 csum_type); 2209 size_t __const btrfs_get_num_csums(void); 2210 2211 2212 /* 2213 * The leaf data grows from end-to-front in the node. 2214 * this returns the address of the start of the last item, 2215 * which is the stop of the leaf data stack 2216 */ 2217 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2218 { 2219 u32 nr = btrfs_header_nritems(leaf); 2220 2221 if (nr == 0) 2222 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2223 return btrfs_item_offset_nr(leaf, nr - 1); 2224 } 2225 2226 /* struct btrfs_file_extent_item */ 2227 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2228 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2229 struct btrfs_file_extent_item, disk_bytenr, 64); 2230 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2231 struct btrfs_file_extent_item, offset, 64); 2232 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2233 struct btrfs_file_extent_item, generation, 64); 2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2235 struct btrfs_file_extent_item, num_bytes, 64); 2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2237 struct btrfs_file_extent_item, disk_num_bytes, 64); 2238 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2239 struct btrfs_file_extent_item, compression, 8); 2240 2241 static inline unsigned long 2242 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2243 { 2244 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2245 } 2246 2247 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2248 { 2249 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2250 } 2251 2252 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2253 disk_bytenr, 64); 2254 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2255 generation, 64); 2256 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2257 disk_num_bytes, 64); 2258 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2259 offset, 64); 2260 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2261 num_bytes, 64); 2262 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2263 ram_bytes, 64); 2264 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2265 compression, 8); 2266 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2267 encryption, 8); 2268 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2269 other_encoding, 16); 2270 2271 /* 2272 * this returns the number of bytes used by the item on disk, minus the 2273 * size of any extent headers. If a file is compressed on disk, this is 2274 * the compressed size 2275 */ 2276 static inline u32 btrfs_file_extent_inline_item_len( 2277 const struct extent_buffer *eb, 2278 struct btrfs_item *e) 2279 { 2280 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2281 } 2282 2283 /* btrfs_qgroup_status_item */ 2284 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2285 generation, 64); 2286 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2287 version, 64); 2288 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2289 flags, 64); 2290 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2291 rescan, 64); 2292 2293 /* btrfs_qgroup_info_item */ 2294 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2295 generation, 64); 2296 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2297 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2298 rfer_cmpr, 64); 2299 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2300 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2301 excl_cmpr, 64); 2302 2303 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2304 struct btrfs_qgroup_info_item, generation, 64); 2305 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2306 rfer, 64); 2307 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2308 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2310 excl, 64); 2311 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2312 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2313 2314 /* btrfs_qgroup_limit_item */ 2315 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2316 flags, 64); 2317 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2318 max_rfer, 64); 2319 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2320 max_excl, 64); 2321 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2322 rsv_rfer, 64); 2323 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2324 rsv_excl, 64); 2325 2326 /* btrfs_dev_replace_item */ 2327 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2328 struct btrfs_dev_replace_item, src_devid, 64); 2329 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2330 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2331 64); 2332 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2333 replace_state, 64); 2334 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2335 time_started, 64); 2336 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2337 time_stopped, 64); 2338 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2339 num_write_errors, 64); 2340 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2341 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2342 64); 2343 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2344 cursor_left, 64); 2345 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2346 cursor_right, 64); 2347 2348 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2349 struct btrfs_dev_replace_item, src_devid, 64); 2350 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2351 struct btrfs_dev_replace_item, 2352 cont_reading_from_srcdev_mode, 64); 2353 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2354 struct btrfs_dev_replace_item, replace_state, 64); 2355 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2356 struct btrfs_dev_replace_item, time_started, 64); 2357 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2358 struct btrfs_dev_replace_item, time_stopped, 64); 2359 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2360 struct btrfs_dev_replace_item, num_write_errors, 64); 2361 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2362 struct btrfs_dev_replace_item, 2363 num_uncorrectable_read_errors, 64); 2364 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2365 struct btrfs_dev_replace_item, cursor_left, 64); 2366 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2367 struct btrfs_dev_replace_item, cursor_right, 64); 2368 2369 /* helper function to cast into the data area of the leaf. */ 2370 #define btrfs_item_ptr(leaf, slot, type) \ 2371 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2372 btrfs_item_offset_nr(leaf, slot))) 2373 2374 #define btrfs_item_ptr_offset(leaf, slot) \ 2375 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2376 btrfs_item_offset_nr(leaf, slot))) 2377 2378 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2379 { 2380 return crc32c(crc, address, length); 2381 } 2382 2383 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2384 { 2385 put_unaligned_le32(~crc, result); 2386 } 2387 2388 static inline u64 btrfs_name_hash(const char *name, int len) 2389 { 2390 return crc32c((u32)~1, name, len); 2391 } 2392 2393 /* 2394 * Figure the key offset of an extended inode ref 2395 */ 2396 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2397 int len) 2398 { 2399 return (u64) crc32c(parent_objectid, name, len); 2400 } 2401 2402 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2403 { 2404 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2405 } 2406 2407 /* extent-tree.c */ 2408 2409 enum btrfs_inline_ref_type { 2410 BTRFS_REF_TYPE_INVALID, 2411 BTRFS_REF_TYPE_BLOCK, 2412 BTRFS_REF_TYPE_DATA, 2413 BTRFS_REF_TYPE_ANY, 2414 }; 2415 2416 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2417 struct btrfs_extent_inline_ref *iref, 2418 enum btrfs_inline_ref_type is_data); 2419 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2420 2421 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2422 2423 /* 2424 * Use this if we would be adding new items, as we could split nodes as we cow 2425 * down the tree. 2426 */ 2427 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2428 unsigned num_items) 2429 { 2430 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2431 } 2432 2433 /* 2434 * Doing a truncate or a modification won't result in new nodes or leaves, just 2435 * what we need for COW. 2436 */ 2437 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2438 unsigned num_items) 2439 { 2440 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2441 } 2442 2443 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2444 u64 start, u64 num_bytes); 2445 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2446 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2447 unsigned long count); 2448 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2449 struct btrfs_delayed_ref_root *delayed_refs, 2450 struct btrfs_delayed_ref_head *head); 2451 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2452 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2453 struct btrfs_fs_info *fs_info, u64 bytenr, 2454 u64 offset, int metadata, u64 *refs, u64 *flags); 2455 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2456 int reserved); 2457 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2458 u64 bytenr, u64 num_bytes); 2459 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2460 int btrfs_cross_ref_exist(struct btrfs_root *root, 2461 u64 objectid, u64 offset, u64 bytenr); 2462 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2463 struct btrfs_root *root, 2464 u64 parent, u64 root_objectid, 2465 const struct btrfs_disk_key *key, 2466 int level, u64 hint, 2467 u64 empty_size); 2468 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2469 struct btrfs_root *root, 2470 struct extent_buffer *buf, 2471 u64 parent, int last_ref); 2472 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2473 struct btrfs_root *root, u64 owner, 2474 u64 offset, u64 ram_bytes, 2475 struct btrfs_key *ins); 2476 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2477 u64 root_objectid, u64 owner, u64 offset, 2478 struct btrfs_key *ins); 2479 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2480 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2481 struct btrfs_key *ins, int is_data, int delalloc); 2482 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2483 struct extent_buffer *buf, int full_backref); 2484 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2485 struct extent_buffer *buf, int full_backref); 2486 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2487 struct extent_buffer *eb, u64 flags, 2488 int level, int is_data); 2489 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2490 2491 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2492 u64 start, u64 len, int delalloc); 2493 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2494 u64 len); 2495 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2496 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2497 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2498 struct btrfs_ref *generic_ref); 2499 2500 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2501 void btrfs_get_block_group_trimming(struct btrfs_block_group *cache); 2502 void btrfs_put_block_group_trimming(struct btrfs_block_group *cache); 2503 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2504 2505 enum btrfs_reserve_flush_enum { 2506 /* If we are in the transaction, we can't flush anything.*/ 2507 BTRFS_RESERVE_NO_FLUSH, 2508 /* 2509 * Flushing delalloc may cause deadlock somewhere, in this 2510 * case, use FLUSH LIMIT 2511 */ 2512 BTRFS_RESERVE_FLUSH_LIMIT, 2513 BTRFS_RESERVE_FLUSH_EVICT, 2514 BTRFS_RESERVE_FLUSH_ALL, 2515 }; 2516 2517 enum btrfs_flush_state { 2518 FLUSH_DELAYED_ITEMS_NR = 1, 2519 FLUSH_DELAYED_ITEMS = 2, 2520 FLUSH_DELAYED_REFS_NR = 3, 2521 FLUSH_DELAYED_REFS = 4, 2522 FLUSH_DELALLOC = 5, 2523 FLUSH_DELALLOC_WAIT = 6, 2524 ALLOC_CHUNK = 7, 2525 ALLOC_CHUNK_FORCE = 8, 2526 RUN_DELAYED_IPUTS = 9, 2527 COMMIT_TRANS = 10, 2528 }; 2529 2530 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2531 struct btrfs_block_rsv *rsv, 2532 int nitems, bool use_global_rsv); 2533 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2534 struct btrfs_block_rsv *rsv); 2535 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2536 2537 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2538 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2539 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2540 u64 start, u64 end); 2541 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2542 u64 num_bytes, u64 *actual_bytes); 2543 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2544 2545 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2546 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2547 struct btrfs_fs_info *fs_info); 2548 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2549 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2550 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2551 2552 /* ctree.c */ 2553 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2554 int level, int *slot); 2555 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2556 int btrfs_previous_item(struct btrfs_root *root, 2557 struct btrfs_path *path, u64 min_objectid, 2558 int type); 2559 int btrfs_previous_extent_item(struct btrfs_root *root, 2560 struct btrfs_path *path, u64 min_objectid); 2561 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2562 struct btrfs_path *path, 2563 const struct btrfs_key *new_key); 2564 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2565 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2566 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2567 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2568 struct btrfs_key *key, int lowest_level, 2569 u64 min_trans); 2570 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2571 struct btrfs_path *path, 2572 u64 min_trans); 2573 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2574 int slot); 2575 2576 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2577 struct btrfs_root *root, struct extent_buffer *buf, 2578 struct extent_buffer *parent, int parent_slot, 2579 struct extent_buffer **cow_ret); 2580 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2581 struct btrfs_root *root, 2582 struct extent_buffer *buf, 2583 struct extent_buffer **cow_ret, u64 new_root_objectid); 2584 int btrfs_block_can_be_shared(struct btrfs_root *root, 2585 struct extent_buffer *buf); 2586 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2587 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2588 int btrfs_split_item(struct btrfs_trans_handle *trans, 2589 struct btrfs_root *root, 2590 struct btrfs_path *path, 2591 const struct btrfs_key *new_key, 2592 unsigned long split_offset); 2593 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2594 struct btrfs_root *root, 2595 struct btrfs_path *path, 2596 const struct btrfs_key *new_key); 2597 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2598 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2599 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2600 const struct btrfs_key *key, struct btrfs_path *p, 2601 int ins_len, int cow); 2602 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2603 struct btrfs_path *p, u64 time_seq); 2604 int btrfs_search_slot_for_read(struct btrfs_root *root, 2605 const struct btrfs_key *key, 2606 struct btrfs_path *p, int find_higher, 2607 int return_any); 2608 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2609 struct btrfs_root *root, struct extent_buffer *parent, 2610 int start_slot, u64 *last_ret, 2611 struct btrfs_key *progress); 2612 void btrfs_release_path(struct btrfs_path *p); 2613 struct btrfs_path *btrfs_alloc_path(void); 2614 void btrfs_free_path(struct btrfs_path *p); 2615 2616 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2617 struct btrfs_path *path, int slot, int nr); 2618 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2619 struct btrfs_root *root, 2620 struct btrfs_path *path) 2621 { 2622 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2623 } 2624 2625 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2626 const struct btrfs_key *cpu_key, u32 *data_size, 2627 u32 total_data, u32 total_size, int nr); 2628 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2629 const struct btrfs_key *key, void *data, u32 data_size); 2630 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2631 struct btrfs_root *root, 2632 struct btrfs_path *path, 2633 const struct btrfs_key *cpu_key, u32 *data_size, 2634 int nr); 2635 2636 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2637 struct btrfs_root *root, 2638 struct btrfs_path *path, 2639 const struct btrfs_key *key, 2640 u32 data_size) 2641 { 2642 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2643 } 2644 2645 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2646 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2647 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2648 u64 time_seq); 2649 static inline int btrfs_next_old_item(struct btrfs_root *root, 2650 struct btrfs_path *p, u64 time_seq) 2651 { 2652 ++p->slots[0]; 2653 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2654 return btrfs_next_old_leaf(root, p, time_seq); 2655 return 0; 2656 } 2657 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2658 { 2659 return btrfs_next_old_item(root, p, 0); 2660 } 2661 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2662 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2663 int for_reloc); 2664 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2665 struct btrfs_root *root, 2666 struct extent_buffer *node, 2667 struct extent_buffer *parent); 2668 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2669 { 2670 /* 2671 * Do it this way so we only ever do one test_bit in the normal case. 2672 */ 2673 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2674 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2675 return 2; 2676 return 1; 2677 } 2678 return 0; 2679 } 2680 2681 /* 2682 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2683 * anything except sleeping. This function is used to check the status of 2684 * the fs. 2685 */ 2686 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2687 { 2688 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2689 } 2690 2691 /* tree mod log functions from ctree.c */ 2692 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2693 struct seq_list *elem); 2694 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2695 struct seq_list *elem); 2696 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2697 2698 /* root-item.c */ 2699 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2700 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2701 int name_len); 2702 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2703 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2704 int name_len); 2705 int btrfs_del_root(struct btrfs_trans_handle *trans, 2706 const struct btrfs_key *key); 2707 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2708 const struct btrfs_key *key, 2709 struct btrfs_root_item *item); 2710 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2711 struct btrfs_root *root, 2712 struct btrfs_key *key, 2713 struct btrfs_root_item *item); 2714 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2715 struct btrfs_path *path, struct btrfs_root_item *root_item, 2716 struct btrfs_key *root_key); 2717 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2718 void btrfs_set_root_node(struct btrfs_root_item *item, 2719 struct extent_buffer *node); 2720 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2721 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2722 struct btrfs_root *root); 2723 2724 /* uuid-tree.c */ 2725 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2726 u64 subid); 2727 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2728 u64 subid); 2729 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2730 2731 /* dir-item.c */ 2732 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2733 const char *name, int name_len); 2734 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2735 int name_len, struct btrfs_inode *dir, 2736 struct btrfs_key *location, u8 type, u64 index); 2737 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2738 struct btrfs_root *root, 2739 struct btrfs_path *path, u64 dir, 2740 const char *name, int name_len, 2741 int mod); 2742 struct btrfs_dir_item * 2743 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2744 struct btrfs_root *root, 2745 struct btrfs_path *path, u64 dir, 2746 u64 objectid, const char *name, int name_len, 2747 int mod); 2748 struct btrfs_dir_item * 2749 btrfs_search_dir_index_item(struct btrfs_root *root, 2750 struct btrfs_path *path, u64 dirid, 2751 const char *name, int name_len); 2752 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2753 struct btrfs_root *root, 2754 struct btrfs_path *path, 2755 struct btrfs_dir_item *di); 2756 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2757 struct btrfs_root *root, 2758 struct btrfs_path *path, u64 objectid, 2759 const char *name, u16 name_len, 2760 const void *data, u16 data_len); 2761 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2762 struct btrfs_root *root, 2763 struct btrfs_path *path, u64 dir, 2764 const char *name, u16 name_len, 2765 int mod); 2766 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2767 struct btrfs_path *path, 2768 const char *name, 2769 int name_len); 2770 2771 /* orphan.c */ 2772 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2773 struct btrfs_root *root, u64 offset); 2774 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2775 struct btrfs_root *root, u64 offset); 2776 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2777 2778 /* inode-item.c */ 2779 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2780 struct btrfs_root *root, 2781 const char *name, int name_len, 2782 u64 inode_objectid, u64 ref_objectid, u64 index); 2783 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2784 struct btrfs_root *root, 2785 const char *name, int name_len, 2786 u64 inode_objectid, u64 ref_objectid, u64 *index); 2787 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2788 struct btrfs_root *root, 2789 struct btrfs_path *path, u64 objectid); 2790 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2791 *root, struct btrfs_path *path, 2792 struct btrfs_key *location, int mod); 2793 2794 struct btrfs_inode_extref * 2795 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2796 struct btrfs_root *root, 2797 struct btrfs_path *path, 2798 const char *name, int name_len, 2799 u64 inode_objectid, u64 ref_objectid, int ins_len, 2800 int cow); 2801 2802 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2803 int slot, const char *name, 2804 int name_len); 2805 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2806 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2807 const char *name, int name_len); 2808 /* file-item.c */ 2809 struct btrfs_dio_private; 2810 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2811 struct btrfs_root *root, u64 bytenr, u64 len); 2812 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2813 u64 offset, u8 *dst); 2814 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2815 struct btrfs_root *root, 2816 u64 objectid, u64 pos, 2817 u64 disk_offset, u64 disk_num_bytes, 2818 u64 num_bytes, u64 offset, u64 ram_bytes, 2819 u8 compression, u8 encryption, u16 other_encoding); 2820 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2821 struct btrfs_root *root, 2822 struct btrfs_path *path, u64 objectid, 2823 u64 bytenr, int mod); 2824 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2825 struct btrfs_root *root, 2826 struct btrfs_ordered_sum *sums); 2827 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 2828 u64 file_start, int contig); 2829 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2830 struct list_head *list, int search_commit); 2831 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2832 const struct btrfs_path *path, 2833 struct btrfs_file_extent_item *fi, 2834 const bool new_inline, 2835 struct extent_map *em); 2836 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 2837 u64 len); 2838 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 2839 u64 len); 2840 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size); 2841 u64 btrfs_file_extent_end(const struct btrfs_path *path); 2842 2843 /* inode.c */ 2844 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2845 u64 start, u64 len); 2846 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2847 u64 *orig_start, u64 *orig_block_len, 2848 u64 *ram_bytes); 2849 2850 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2851 struct btrfs_inode *inode); 2852 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2853 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2854 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2855 struct btrfs_root *root, 2856 struct btrfs_inode *dir, struct btrfs_inode *inode, 2857 const char *name, int name_len); 2858 int btrfs_add_link(struct btrfs_trans_handle *trans, 2859 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2860 const char *name, int name_len, int add_backref, u64 index); 2861 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2862 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2863 int front); 2864 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2865 struct btrfs_root *root, 2866 struct inode *inode, u64 new_size, 2867 u32 min_type); 2868 2869 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 2870 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 2871 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2872 unsigned int extra_bits, 2873 struct extent_state **cached_state); 2874 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2875 struct btrfs_root *new_root, 2876 struct btrfs_root *parent_root, 2877 u64 new_dirid); 2878 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 2879 unsigned *bits); 2880 void btrfs_clear_delalloc_extent(struct inode *inode, 2881 struct extent_state *state, unsigned *bits); 2882 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 2883 struct extent_state *other); 2884 void btrfs_split_delalloc_extent(struct inode *inode, 2885 struct extent_state *orig, u64 split); 2886 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 2887 unsigned long bio_flags); 2888 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 2889 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 2890 int btrfs_readpage(struct file *file, struct page *page); 2891 void btrfs_evict_inode(struct inode *inode); 2892 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2893 struct inode *btrfs_alloc_inode(struct super_block *sb); 2894 void btrfs_destroy_inode(struct inode *inode); 2895 void btrfs_free_inode(struct inode *inode); 2896 int btrfs_drop_inode(struct inode *inode); 2897 int __init btrfs_init_cachep(void); 2898 void __cold btrfs_destroy_cachep(void); 2899 struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, 2900 struct btrfs_root *root, struct btrfs_path *path); 2901 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2902 struct btrfs_root *root); 2903 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 2904 struct page *page, size_t pg_offset, 2905 u64 start, u64 end); 2906 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2907 struct btrfs_root *root, 2908 struct inode *inode); 2909 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 2910 struct btrfs_root *root, struct inode *inode); 2911 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 2912 struct btrfs_inode *inode); 2913 int btrfs_orphan_cleanup(struct btrfs_root *root); 2914 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 2915 void btrfs_add_delayed_iput(struct inode *inode); 2916 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 2917 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 2918 int btrfs_prealloc_file_range(struct inode *inode, int mode, 2919 u64 start, u64 num_bytes, u64 min_size, 2920 loff_t actual_len, u64 *alloc_hint); 2921 int btrfs_prealloc_file_range_trans(struct inode *inode, 2922 struct btrfs_trans_handle *trans, int mode, 2923 u64 start, u64 num_bytes, u64 min_size, 2924 loff_t actual_len, u64 *alloc_hint); 2925 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 2926 u64 start, u64 end, int *page_started, unsigned long *nr_written, 2927 struct writeback_control *wbc); 2928 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 2929 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 2930 u64 end, int uptodate); 2931 extern const struct dentry_operations btrfs_dentry_operations; 2932 2933 /* ioctl.c */ 2934 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2935 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2936 int btrfs_ioctl_get_supported_features(void __user *arg); 2937 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 2938 int __pure btrfs_is_empty_uuid(u8 *uuid); 2939 int btrfs_defrag_file(struct inode *inode, struct file *file, 2940 struct btrfs_ioctl_defrag_range_args *range, 2941 u64 newer_than, unsigned long max_pages); 2942 void btrfs_get_block_group_info(struct list_head *groups_list, 2943 struct btrfs_ioctl_space_info *space); 2944 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 2945 struct btrfs_ioctl_balance_args *bargs); 2946 2947 /* file.c */ 2948 int __init btrfs_auto_defrag_init(void); 2949 void __cold btrfs_auto_defrag_exit(void); 2950 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 2951 struct btrfs_inode *inode); 2952 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 2953 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 2954 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 2955 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 2956 int skip_pinned); 2957 extern const struct file_operations btrfs_file_operations; 2958 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 2959 struct btrfs_root *root, struct inode *inode, 2960 struct btrfs_path *path, u64 start, u64 end, 2961 u64 *drop_end, int drop_cache, 2962 int replace_extent, 2963 u32 extent_item_size, 2964 int *key_inserted); 2965 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 2966 struct btrfs_root *root, struct inode *inode, u64 start, 2967 u64 end, int drop_cache); 2968 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, 2969 const u64 start, const u64 end, 2970 struct btrfs_clone_extent_info *clone_info, 2971 struct btrfs_trans_handle **trans_out); 2972 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2973 struct btrfs_inode *inode, u64 start, u64 end); 2974 int btrfs_release_file(struct inode *inode, struct file *file); 2975 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 2976 size_t num_pages, loff_t pos, size_t write_bytes, 2977 struct extent_state **cached); 2978 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 2979 2980 /* tree-defrag.c */ 2981 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2982 struct btrfs_root *root); 2983 2984 /* super.c */ 2985 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 2986 unsigned long new_flags); 2987 int btrfs_sync_fs(struct super_block *sb, int wait); 2988 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 2989 u64 subvol_objectid); 2990 2991 static inline __printf(2, 3) __cold 2992 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 2993 { 2994 } 2995 2996 #ifdef CONFIG_PRINTK 2997 __printf(2, 3) 2998 __cold 2999 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3000 #else 3001 #define btrfs_printk(fs_info, fmt, args...) \ 3002 btrfs_no_printk(fs_info, fmt, ##args) 3003 #endif 3004 3005 #define btrfs_emerg(fs_info, fmt, args...) \ 3006 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3007 #define btrfs_alert(fs_info, fmt, args...) \ 3008 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3009 #define btrfs_crit(fs_info, fmt, args...) \ 3010 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3011 #define btrfs_err(fs_info, fmt, args...) \ 3012 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3013 #define btrfs_warn(fs_info, fmt, args...) \ 3014 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3015 #define btrfs_notice(fs_info, fmt, args...) \ 3016 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3017 #define btrfs_info(fs_info, fmt, args...) \ 3018 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3019 3020 /* 3021 * Wrappers that use printk_in_rcu 3022 */ 3023 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3024 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3025 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3026 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3027 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3028 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3029 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3030 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3031 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3032 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3033 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3034 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3035 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3036 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3037 3038 /* 3039 * Wrappers that use a ratelimited printk_in_rcu 3040 */ 3041 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3042 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3043 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3044 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3045 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3046 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3047 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3048 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3049 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3050 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3051 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3052 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3053 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3054 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3055 3056 /* 3057 * Wrappers that use a ratelimited printk 3058 */ 3059 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3060 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3061 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3062 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3063 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3064 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3065 #define btrfs_err_rl(fs_info, fmt, args...) \ 3066 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3067 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3068 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3069 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3070 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3071 #define btrfs_info_rl(fs_info, fmt, args...) \ 3072 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3073 3074 #if defined(CONFIG_DYNAMIC_DEBUG) 3075 #define btrfs_debug(fs_info, fmt, args...) \ 3076 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3077 fs_info, KERN_DEBUG fmt, ##args) 3078 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3079 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3080 fs_info, KERN_DEBUG fmt, ##args) 3081 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3082 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3083 fs_info, KERN_DEBUG fmt, ##args) 3084 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3085 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3086 fs_info, KERN_DEBUG fmt, ##args) 3087 #elif defined(DEBUG) 3088 #define btrfs_debug(fs_info, fmt, args...) \ 3089 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3090 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3091 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3092 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3093 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3094 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3095 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3096 #else 3097 #define btrfs_debug(fs_info, fmt, args...) \ 3098 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3099 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3100 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3101 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3102 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3103 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3104 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3105 #endif 3106 3107 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3108 do { \ 3109 rcu_read_lock(); \ 3110 btrfs_printk(fs_info, fmt, ##args); \ 3111 rcu_read_unlock(); \ 3112 } while (0) 3113 3114 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3115 do { \ 3116 rcu_read_lock(); \ 3117 btrfs_no_printk(fs_info, fmt, ##args); \ 3118 rcu_read_unlock(); \ 3119 } while (0) 3120 3121 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3122 do { \ 3123 static DEFINE_RATELIMIT_STATE(_rs, \ 3124 DEFAULT_RATELIMIT_INTERVAL, \ 3125 DEFAULT_RATELIMIT_BURST); \ 3126 if (__ratelimit(&_rs)) \ 3127 btrfs_printk(fs_info, fmt, ##args); \ 3128 } while (0) 3129 3130 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3131 do { \ 3132 rcu_read_lock(); \ 3133 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3134 rcu_read_unlock(); \ 3135 } while (0) 3136 3137 #ifdef CONFIG_BTRFS_ASSERT 3138 __cold __noreturn 3139 static inline void assertfail(const char *expr, const char *file, int line) 3140 { 3141 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3142 BUG(); 3143 } 3144 3145 #define ASSERT(expr) \ 3146 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3147 3148 #else 3149 static inline void assertfail(const char *expr, const char* file, int line) { } 3150 #define ASSERT(expr) (void)(expr) 3151 #endif 3152 3153 /* 3154 * Use that for functions that are conditionally exported for sanity tests but 3155 * otherwise static 3156 */ 3157 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3158 #define EXPORT_FOR_TESTS static 3159 #else 3160 #define EXPORT_FOR_TESTS 3161 #endif 3162 3163 __cold 3164 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3165 { 3166 btrfs_err(fs_info, 3167 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3168 } 3169 3170 __printf(5, 6) 3171 __cold 3172 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3173 unsigned int line, int errno, const char *fmt, ...); 3174 3175 const char * __attribute_const__ btrfs_decode_error(int errno); 3176 3177 __cold 3178 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3179 const char *function, 3180 unsigned int line, int errno); 3181 3182 /* 3183 * Call btrfs_abort_transaction as early as possible when an error condition is 3184 * detected, that way the exact line number is reported. 3185 */ 3186 #define btrfs_abort_transaction(trans, errno) \ 3187 do { \ 3188 /* Report first abort since mount */ \ 3189 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3190 &((trans)->fs_info->fs_state))) { \ 3191 if ((errno) != -EIO) { \ 3192 WARN(1, KERN_DEBUG \ 3193 "BTRFS: Transaction aborted (error %d)\n", \ 3194 (errno)); \ 3195 } else { \ 3196 btrfs_debug((trans)->fs_info, \ 3197 "Transaction aborted (error %d)", \ 3198 (errno)); \ 3199 } \ 3200 } \ 3201 __btrfs_abort_transaction((trans), __func__, \ 3202 __LINE__, (errno)); \ 3203 } while (0) 3204 3205 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3206 do { \ 3207 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3208 (errno), fmt, ##args); \ 3209 } while (0) 3210 3211 __printf(5, 6) 3212 __cold 3213 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3214 unsigned int line, int errno, const char *fmt, ...); 3215 /* 3216 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3217 * will panic(). Otherwise we BUG() here. 3218 */ 3219 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3220 do { \ 3221 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3222 BUG(); \ 3223 } while (0) 3224 3225 3226 /* compatibility and incompatibility defines */ 3227 3228 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3229 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3230 #opt) 3231 3232 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3233 u64 flag, const char* name) 3234 { 3235 struct btrfs_super_block *disk_super; 3236 u64 features; 3237 3238 disk_super = fs_info->super_copy; 3239 features = btrfs_super_incompat_flags(disk_super); 3240 if (!(features & flag)) { 3241 spin_lock(&fs_info->super_lock); 3242 features = btrfs_super_incompat_flags(disk_super); 3243 if (!(features & flag)) { 3244 features |= flag; 3245 btrfs_set_super_incompat_flags(disk_super, features); 3246 btrfs_info(fs_info, 3247 "setting incompat feature flag for %s (0x%llx)", 3248 name, flag); 3249 } 3250 spin_unlock(&fs_info->super_lock); 3251 } 3252 } 3253 3254 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3255 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3256 #opt) 3257 3258 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3259 u64 flag, const char* name) 3260 { 3261 struct btrfs_super_block *disk_super; 3262 u64 features; 3263 3264 disk_super = fs_info->super_copy; 3265 features = btrfs_super_incompat_flags(disk_super); 3266 if (features & flag) { 3267 spin_lock(&fs_info->super_lock); 3268 features = btrfs_super_incompat_flags(disk_super); 3269 if (features & flag) { 3270 features &= ~flag; 3271 btrfs_set_super_incompat_flags(disk_super, features); 3272 btrfs_info(fs_info, 3273 "clearing incompat feature flag for %s (0x%llx)", 3274 name, flag); 3275 } 3276 spin_unlock(&fs_info->super_lock); 3277 } 3278 } 3279 3280 #define btrfs_fs_incompat(fs_info, opt) \ 3281 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3282 3283 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3284 { 3285 struct btrfs_super_block *disk_super; 3286 disk_super = fs_info->super_copy; 3287 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3288 } 3289 3290 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3291 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3292 #opt) 3293 3294 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3295 u64 flag, const char *name) 3296 { 3297 struct btrfs_super_block *disk_super; 3298 u64 features; 3299 3300 disk_super = fs_info->super_copy; 3301 features = btrfs_super_compat_ro_flags(disk_super); 3302 if (!(features & flag)) { 3303 spin_lock(&fs_info->super_lock); 3304 features = btrfs_super_compat_ro_flags(disk_super); 3305 if (!(features & flag)) { 3306 features |= flag; 3307 btrfs_set_super_compat_ro_flags(disk_super, features); 3308 btrfs_info(fs_info, 3309 "setting compat-ro feature flag for %s (0x%llx)", 3310 name, flag); 3311 } 3312 spin_unlock(&fs_info->super_lock); 3313 } 3314 } 3315 3316 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3317 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3318 #opt) 3319 3320 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3321 u64 flag, const char *name) 3322 { 3323 struct btrfs_super_block *disk_super; 3324 u64 features; 3325 3326 disk_super = fs_info->super_copy; 3327 features = btrfs_super_compat_ro_flags(disk_super); 3328 if (features & flag) { 3329 spin_lock(&fs_info->super_lock); 3330 features = btrfs_super_compat_ro_flags(disk_super); 3331 if (features & flag) { 3332 features &= ~flag; 3333 btrfs_set_super_compat_ro_flags(disk_super, features); 3334 btrfs_info(fs_info, 3335 "clearing compat-ro feature flag for %s (0x%llx)", 3336 name, flag); 3337 } 3338 spin_unlock(&fs_info->super_lock); 3339 } 3340 } 3341 3342 #define btrfs_fs_compat_ro(fs_info, opt) \ 3343 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3344 3345 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3346 { 3347 struct btrfs_super_block *disk_super; 3348 disk_super = fs_info->super_copy; 3349 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3350 } 3351 3352 /* acl.c */ 3353 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3354 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3355 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3356 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3357 struct inode *inode, struct inode *dir); 3358 #else 3359 #define btrfs_get_acl NULL 3360 #define btrfs_set_acl NULL 3361 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3362 struct inode *inode, struct inode *dir) 3363 { 3364 return 0; 3365 } 3366 #endif 3367 3368 /* relocation.c */ 3369 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3370 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3371 struct btrfs_root *root); 3372 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3373 struct btrfs_root *root); 3374 int btrfs_recover_relocation(struct btrfs_root *root); 3375 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3376 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3377 struct btrfs_root *root, struct extent_buffer *buf, 3378 struct extent_buffer *cow); 3379 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3380 u64 *bytes_to_reserve); 3381 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3382 struct btrfs_pending_snapshot *pending); 3383 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3384 3385 /* scrub.c */ 3386 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3387 u64 end, struct btrfs_scrub_progress *progress, 3388 int readonly, int is_dev_replace); 3389 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3390 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3391 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3392 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3393 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3394 struct btrfs_scrub_progress *progress); 3395 static inline void btrfs_init_full_stripe_locks_tree( 3396 struct btrfs_full_stripe_locks_tree *locks_root) 3397 { 3398 locks_root->root = RB_ROOT; 3399 mutex_init(&locks_root->lock); 3400 } 3401 3402 /* dev-replace.c */ 3403 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3404 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3405 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3406 3407 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3408 { 3409 btrfs_bio_counter_sub(fs_info, 1); 3410 } 3411 3412 /* reada.c */ 3413 struct reada_control { 3414 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3415 struct btrfs_key key_start; 3416 struct btrfs_key key_end; /* exclusive */ 3417 atomic_t elems; 3418 struct kref refcnt; 3419 wait_queue_head_t wait; 3420 }; 3421 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3422 struct btrfs_key *start, struct btrfs_key *end); 3423 int btrfs_reada_wait(void *handle); 3424 void btrfs_reada_detach(void *handle); 3425 int btree_readahead_hook(struct extent_buffer *eb, int err); 3426 3427 static inline int is_fstree(u64 rootid) 3428 { 3429 if (rootid == BTRFS_FS_TREE_OBJECTID || 3430 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3431 !btrfs_qgroup_level(rootid))) 3432 return 1; 3433 return 0; 3434 } 3435 3436 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3437 { 3438 return signal_pending(current); 3439 } 3440 3441 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3442 3443 /* Sanity test specific functions */ 3444 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3445 void btrfs_test_inode_set_ops(struct inode *inode); 3446 void btrfs_test_destroy_inode(struct inode *inode); 3447 3448 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3449 { 3450 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3451 } 3452 #else 3453 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3454 { 3455 return 0; 3456 } 3457 #endif 3458 3459 #endif 3460