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 struct btrfs_root *data_reloc_root; 586 587 /* the log root tree is a directory of all the other log roots */ 588 struct btrfs_root *log_root_tree; 589 590 spinlock_t fs_roots_radix_lock; 591 struct radix_tree_root fs_roots_radix; 592 593 /* block group cache stuff */ 594 spinlock_t block_group_cache_lock; 595 u64 first_logical_byte; 596 struct rb_root block_group_cache_tree; 597 598 /* keep track of unallocated space */ 599 atomic64_t free_chunk_space; 600 601 /* Track ranges which are used by log trees blocks/logged data extents */ 602 struct extent_io_tree excluded_extents; 603 604 /* logical->physical extent mapping */ 605 struct extent_map_tree mapping_tree; 606 607 /* 608 * block reservation for extent, checksum, root tree and 609 * delayed dir index item 610 */ 611 struct btrfs_block_rsv global_block_rsv; 612 /* block reservation for metadata operations */ 613 struct btrfs_block_rsv trans_block_rsv; 614 /* block reservation for chunk tree */ 615 struct btrfs_block_rsv chunk_block_rsv; 616 /* block reservation for delayed operations */ 617 struct btrfs_block_rsv delayed_block_rsv; 618 /* block reservation for delayed refs */ 619 struct btrfs_block_rsv delayed_refs_rsv; 620 621 struct btrfs_block_rsv empty_block_rsv; 622 623 u64 generation; 624 u64 last_trans_committed; 625 u64 avg_delayed_ref_runtime; 626 627 /* 628 * this is updated to the current trans every time a full commit 629 * is required instead of the faster short fsync log commits 630 */ 631 u64 last_trans_log_full_commit; 632 unsigned long mount_opt; 633 /* 634 * Track requests for actions that need to be done during transaction 635 * commit (like for some mount options). 636 */ 637 unsigned long pending_changes; 638 unsigned long compress_type:4; 639 unsigned int compress_level; 640 u32 commit_interval; 641 /* 642 * It is a suggestive number, the read side is safe even it gets a 643 * wrong number because we will write out the data into a regular 644 * extent. The write side(mount/remount) is under ->s_umount lock, 645 * so it is also safe. 646 */ 647 u64 max_inline; 648 649 struct btrfs_transaction *running_transaction; 650 wait_queue_head_t transaction_throttle; 651 wait_queue_head_t transaction_wait; 652 wait_queue_head_t transaction_blocked_wait; 653 wait_queue_head_t async_submit_wait; 654 655 /* 656 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 657 * when they are updated. 658 * 659 * Because we do not clear the flags for ever, so we needn't use 660 * the lock on the read side. 661 * 662 * We also needn't use the lock when we mount the fs, because 663 * there is no other task which will update the flag. 664 */ 665 spinlock_t super_lock; 666 struct btrfs_super_block *super_copy; 667 struct btrfs_super_block *super_for_commit; 668 struct super_block *sb; 669 struct inode *btree_inode; 670 struct mutex tree_log_mutex; 671 struct mutex transaction_kthread_mutex; 672 struct mutex cleaner_mutex; 673 struct mutex chunk_mutex; 674 675 /* 676 * this is taken to make sure we don't set block groups ro after 677 * the free space cache has been allocated on them 678 */ 679 struct mutex ro_block_group_mutex; 680 681 /* this is used during read/modify/write to make sure 682 * no two ios are trying to mod the same stripe at the same 683 * time 684 */ 685 struct btrfs_stripe_hash_table *stripe_hash_table; 686 687 /* 688 * this protects the ordered operations list only while we are 689 * processing all of the entries on it. This way we make 690 * sure the commit code doesn't find the list temporarily empty 691 * because another function happens to be doing non-waiting preflush 692 * before jumping into the main commit. 693 */ 694 struct mutex ordered_operations_mutex; 695 696 struct rw_semaphore commit_root_sem; 697 698 struct rw_semaphore cleanup_work_sem; 699 700 struct rw_semaphore subvol_sem; 701 702 spinlock_t trans_lock; 703 /* 704 * the reloc mutex goes with the trans lock, it is taken 705 * during commit to protect us from the relocation code 706 */ 707 struct mutex reloc_mutex; 708 709 struct list_head trans_list; 710 struct list_head dead_roots; 711 struct list_head caching_block_groups; 712 713 spinlock_t delayed_iput_lock; 714 struct list_head delayed_iputs; 715 atomic_t nr_delayed_iputs; 716 wait_queue_head_t delayed_iputs_wait; 717 718 atomic64_t tree_mod_seq; 719 720 /* this protects tree_mod_log and tree_mod_seq_list */ 721 rwlock_t tree_mod_log_lock; 722 struct rb_root tree_mod_log; 723 struct list_head tree_mod_seq_list; 724 725 atomic_t async_delalloc_pages; 726 727 /* 728 * this is used to protect the following list -- ordered_roots. 729 */ 730 spinlock_t ordered_root_lock; 731 732 /* 733 * all fs/file tree roots in which there are data=ordered extents 734 * pending writeback are added into this list. 735 * 736 * these can span multiple transactions and basically include 737 * every dirty data page that isn't from nodatacow 738 */ 739 struct list_head ordered_roots; 740 741 struct mutex delalloc_root_mutex; 742 spinlock_t delalloc_root_lock; 743 /* all fs/file tree roots that have delalloc inodes. */ 744 struct list_head delalloc_roots; 745 746 /* 747 * there is a pool of worker threads for checksumming during writes 748 * and a pool for checksumming after reads. This is because readers 749 * can run with FS locks held, and the writers may be waiting for 750 * those locks. We don't want ordering in the pending list to cause 751 * deadlocks, and so the two are serviced separately. 752 * 753 * A third pool does submit_bio to avoid deadlocking with the other 754 * two 755 */ 756 struct btrfs_workqueue *workers; 757 struct btrfs_workqueue *delalloc_workers; 758 struct btrfs_workqueue *flush_workers; 759 struct btrfs_workqueue *endio_workers; 760 struct btrfs_workqueue *endio_meta_workers; 761 struct btrfs_workqueue *endio_raid56_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, 973 974 /* 975 * Set if tree blocks of this root can be shared by other roots. 976 * Only subvolume trees and their reloc trees have this bit set. 977 * Conflicts with TRACK_DIRTY bit. 978 * 979 * This affects two things: 980 * 981 * - How balance works 982 * For shareable roots, we need to use reloc tree and do path 983 * replacement for balance, and need various pre/post hooks for 984 * snapshot creation to handle them. 985 * 986 * While for non-shareable trees, we just simply do a tree search 987 * with COW. 988 * 989 * - How dirty roots are tracked 990 * For shareable roots, btrfs_record_root_in_trans() is needed to 991 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 992 * don't need to set this manually. 993 */ 994 BTRFS_ROOT_SHAREABLE, 995 BTRFS_ROOT_TRACK_DIRTY, 996 BTRFS_ROOT_IN_RADIX, 997 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 998 BTRFS_ROOT_DEFRAG_RUNNING, 999 BTRFS_ROOT_FORCE_COW, 1000 BTRFS_ROOT_MULTI_LOG_TASKS, 1001 BTRFS_ROOT_DIRTY, 1002 BTRFS_ROOT_DELETING, 1003 1004 /* 1005 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1006 * 1007 * Set for the subvolume tree owning the reloc tree. 1008 */ 1009 BTRFS_ROOT_DEAD_RELOC_TREE, 1010 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1011 BTRFS_ROOT_DEAD_TREE, 1012 }; 1013 1014 /* 1015 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1016 * code. For detail check comment in fs/btrfs/qgroup.c. 1017 */ 1018 struct btrfs_qgroup_swapped_blocks { 1019 spinlock_t lock; 1020 /* RM_EMPTY_ROOT() of above blocks[] */ 1021 bool swapped; 1022 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1023 }; 1024 1025 /* 1026 * in ram representation of the tree. extent_root is used for all allocations 1027 * and for the extent tree extent_root root. 1028 */ 1029 struct btrfs_root { 1030 struct extent_buffer *node; 1031 1032 struct extent_buffer *commit_root; 1033 struct btrfs_root *log_root; 1034 struct btrfs_root *reloc_root; 1035 1036 unsigned long state; 1037 struct btrfs_root_item root_item; 1038 struct btrfs_key root_key; 1039 struct btrfs_fs_info *fs_info; 1040 struct extent_io_tree dirty_log_pages; 1041 1042 struct mutex objectid_mutex; 1043 1044 spinlock_t accounting_lock; 1045 struct btrfs_block_rsv *block_rsv; 1046 1047 /* free ino cache stuff */ 1048 struct btrfs_free_space_ctl *free_ino_ctl; 1049 enum btrfs_caching_type ino_cache_state; 1050 spinlock_t ino_cache_lock; 1051 wait_queue_head_t ino_cache_wait; 1052 struct btrfs_free_space_ctl *free_ino_pinned; 1053 u64 ino_cache_progress; 1054 struct inode *ino_cache_inode; 1055 1056 struct mutex log_mutex; 1057 wait_queue_head_t log_writer_wait; 1058 wait_queue_head_t log_commit_wait[2]; 1059 struct list_head log_ctxs[2]; 1060 atomic_t log_writers; 1061 atomic_t log_commit[2]; 1062 atomic_t log_batch; 1063 int log_transid; 1064 /* No matter the commit succeeds or not*/ 1065 int log_transid_committed; 1066 /* Just be updated when the commit succeeds. */ 1067 int last_log_commit; 1068 pid_t log_start_pid; 1069 1070 u64 last_trans; 1071 1072 u32 type; 1073 1074 u64 highest_objectid; 1075 1076 u64 defrag_trans_start; 1077 struct btrfs_key defrag_progress; 1078 struct btrfs_key defrag_max; 1079 1080 /* The dirty list is only used by non-shareable roots */ 1081 struct list_head dirty_list; 1082 1083 struct list_head root_list; 1084 1085 spinlock_t log_extents_lock[2]; 1086 struct list_head logged_list[2]; 1087 1088 int orphan_cleanup_state; 1089 1090 spinlock_t inode_lock; 1091 /* red-black tree that keeps track of in-memory inodes */ 1092 struct rb_root inode_tree; 1093 1094 /* 1095 * radix tree that keeps track of delayed nodes of every inode, 1096 * protected by inode_lock 1097 */ 1098 struct radix_tree_root delayed_nodes_tree; 1099 /* 1100 * right now this just gets used so that a root has its own devid 1101 * for stat. It may be used for more later 1102 */ 1103 dev_t anon_dev; 1104 1105 spinlock_t root_item_lock; 1106 refcount_t refs; 1107 1108 struct mutex delalloc_mutex; 1109 spinlock_t delalloc_lock; 1110 /* 1111 * all of the inodes that have delalloc bytes. It is possible for 1112 * this list to be empty even when there is still dirty data=ordered 1113 * extents waiting to finish IO. 1114 */ 1115 struct list_head delalloc_inodes; 1116 struct list_head delalloc_root; 1117 u64 nr_delalloc_inodes; 1118 1119 struct mutex ordered_extent_mutex; 1120 /* 1121 * this is used by the balancing code to wait for all the pending 1122 * ordered extents 1123 */ 1124 spinlock_t ordered_extent_lock; 1125 1126 /* 1127 * all of the data=ordered extents pending writeback 1128 * these can span multiple transactions and basically include 1129 * every dirty data page that isn't from nodatacow 1130 */ 1131 struct list_head ordered_extents; 1132 struct list_head ordered_root; 1133 u64 nr_ordered_extents; 1134 1135 /* 1136 * Not empty if this subvolume root has gone through tree block swap 1137 * (relocation) 1138 * 1139 * Will be used by reloc_control::dirty_subvol_roots. 1140 */ 1141 struct list_head reloc_dirty_list; 1142 1143 /* 1144 * Number of currently running SEND ioctls to prevent 1145 * manipulation with the read-only status via SUBVOL_SETFLAGS 1146 */ 1147 int send_in_progress; 1148 /* 1149 * Number of currently running deduplication operations that have a 1150 * destination inode belonging to this root. Protected by the lock 1151 * root_item_lock. 1152 */ 1153 int dedupe_in_progress; 1154 /* For exclusion of snapshot creation and nocow writes */ 1155 struct btrfs_drew_lock snapshot_lock; 1156 1157 atomic_t snapshot_force_cow; 1158 1159 /* For qgroup metadata reserved space */ 1160 spinlock_t qgroup_meta_rsv_lock; 1161 u64 qgroup_meta_rsv_pertrans; 1162 u64 qgroup_meta_rsv_prealloc; 1163 1164 /* Number of active swapfiles */ 1165 atomic_t nr_swapfiles; 1166 1167 /* Record pairs of swapped blocks for qgroup */ 1168 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1169 1170 /* Used only by log trees, when logging csum items */ 1171 struct extent_io_tree log_csum_range; 1172 1173 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1174 u64 alloc_bytenr; 1175 #endif 1176 1177 #ifdef CONFIG_BTRFS_DEBUG 1178 struct list_head leak_list; 1179 #endif 1180 }; 1181 1182 struct btrfs_clone_extent_info { 1183 u64 disk_offset; 1184 u64 disk_len; 1185 u64 data_offset; 1186 u64 data_len; 1187 u64 file_offset; 1188 char *extent_buf; 1189 u32 item_size; 1190 }; 1191 1192 struct btrfs_file_private { 1193 void *filldir_buf; 1194 }; 1195 1196 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1197 { 1198 return btrfs_sb(inode->i_sb)->sectorsize; 1199 } 1200 1201 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1202 { 1203 1204 return info->nodesize - sizeof(struct btrfs_header); 1205 } 1206 1207 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1208 1209 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1210 { 1211 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1212 } 1213 1214 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1215 { 1216 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1217 } 1218 1219 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1220 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1221 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1222 { 1223 return BTRFS_MAX_ITEM_SIZE(info) - 1224 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1225 } 1226 1227 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1228 { 1229 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1230 } 1231 1232 /* 1233 * Flags for mount options. 1234 * 1235 * Note: don't forget to add new options to btrfs_show_options() 1236 */ 1237 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1238 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1239 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1240 #define BTRFS_MOUNT_SSD (1 << 3) 1241 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1242 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1243 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1244 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1245 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1246 #define BTRFS_MOUNT_NOSSD (1 << 9) 1247 #define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1248 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1249 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1250 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1251 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1252 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1253 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1254 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1255 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1256 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1257 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1258 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1259 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1260 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1261 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1262 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1263 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1264 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1265 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1266 #define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1267 1268 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1269 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1270 1271 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1272 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1273 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1274 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1275 BTRFS_MOUNT_##opt) 1276 1277 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1278 { \ 1279 if (!btrfs_test_opt(fs_info, opt)) \ 1280 btrfs_info(fs_info, fmt, ##args); \ 1281 btrfs_set_opt(fs_info->mount_opt, opt); \ 1282 } 1283 1284 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1285 { \ 1286 if (btrfs_test_opt(fs_info, opt)) \ 1287 btrfs_info(fs_info, fmt, ##args); \ 1288 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1289 } 1290 1291 /* 1292 * Requests for changes that need to be done during transaction commit. 1293 * 1294 * Internal mount options that are used for special handling of the real 1295 * mount options (eg. cannot be set during remount and have to be set during 1296 * transaction commit) 1297 */ 1298 1299 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1300 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1301 #define BTRFS_PENDING_COMMIT (2) 1302 1303 #define btrfs_test_pending(info, opt) \ 1304 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1305 #define btrfs_set_pending(info, opt) \ 1306 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1307 #define btrfs_clear_pending(info, opt) \ 1308 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1309 1310 /* 1311 * Helpers for setting pending mount option changes. 1312 * 1313 * Expects corresponding macros 1314 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1315 */ 1316 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1317 do { \ 1318 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1319 btrfs_info((info), fmt, ##args); \ 1320 btrfs_set_pending((info), SET_##opt); \ 1321 btrfs_clear_pending((info), CLEAR_##opt); \ 1322 } \ 1323 } while(0) 1324 1325 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1326 do { \ 1327 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1328 btrfs_info((info), fmt, ##args); \ 1329 btrfs_set_pending((info), CLEAR_##opt); \ 1330 btrfs_clear_pending((info), SET_##opt); \ 1331 } \ 1332 } while(0) 1333 1334 /* 1335 * Inode flags 1336 */ 1337 #define BTRFS_INODE_NODATASUM (1 << 0) 1338 #define BTRFS_INODE_NODATACOW (1 << 1) 1339 #define BTRFS_INODE_READONLY (1 << 2) 1340 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1341 #define BTRFS_INODE_PREALLOC (1 << 4) 1342 #define BTRFS_INODE_SYNC (1 << 5) 1343 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1344 #define BTRFS_INODE_APPEND (1 << 7) 1345 #define BTRFS_INODE_NODUMP (1 << 8) 1346 #define BTRFS_INODE_NOATIME (1 << 9) 1347 #define BTRFS_INODE_DIRSYNC (1 << 10) 1348 #define BTRFS_INODE_COMPRESS (1 << 11) 1349 1350 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1351 1352 #define BTRFS_INODE_FLAG_MASK \ 1353 (BTRFS_INODE_NODATASUM | \ 1354 BTRFS_INODE_NODATACOW | \ 1355 BTRFS_INODE_READONLY | \ 1356 BTRFS_INODE_NOCOMPRESS | \ 1357 BTRFS_INODE_PREALLOC | \ 1358 BTRFS_INODE_SYNC | \ 1359 BTRFS_INODE_IMMUTABLE | \ 1360 BTRFS_INODE_APPEND | \ 1361 BTRFS_INODE_NODUMP | \ 1362 BTRFS_INODE_NOATIME | \ 1363 BTRFS_INODE_DIRSYNC | \ 1364 BTRFS_INODE_COMPRESS | \ 1365 BTRFS_INODE_ROOT_ITEM_INIT) 1366 1367 struct btrfs_map_token { 1368 struct extent_buffer *eb; 1369 char *kaddr; 1370 unsigned long offset; 1371 }; 1372 1373 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1374 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1375 1376 static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1377 struct extent_buffer *eb) 1378 { 1379 token->eb = eb; 1380 token->kaddr = page_address(eb->pages[0]); 1381 token->offset = 0; 1382 } 1383 1384 /* some macros to generate set/get functions for the struct fields. This 1385 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1386 * one for u8: 1387 */ 1388 #define le8_to_cpu(v) (v) 1389 #define cpu_to_le8(v) (v) 1390 #define __le8 u8 1391 1392 #define read_eb_member(eb, ptr, type, member, result) (\ 1393 read_extent_buffer(eb, (char *)(result), \ 1394 ((unsigned long)(ptr)) + \ 1395 offsetof(type, member), \ 1396 sizeof(((type *)0)->member))) 1397 1398 #define write_eb_member(eb, ptr, type, member, result) (\ 1399 write_extent_buffer(eb, (char *)(result), \ 1400 ((unsigned long)(ptr)) + \ 1401 offsetof(type, member), \ 1402 sizeof(((type *)0)->member))) 1403 1404 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1405 u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1406 const void *ptr, unsigned long off); \ 1407 void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1408 const void *ptr, unsigned long off, \ 1409 u##bits val); \ 1410 u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1411 const void *ptr, unsigned long off); \ 1412 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1413 unsigned long off, u##bits val); 1414 1415 DECLARE_BTRFS_SETGET_BITS(8) 1416 DECLARE_BTRFS_SETGET_BITS(16) 1417 DECLARE_BTRFS_SETGET_BITS(32) 1418 DECLARE_BTRFS_SETGET_BITS(64) 1419 1420 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1421 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1422 const type *s) \ 1423 { \ 1424 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1425 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1426 } \ 1427 static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1428 u##bits val) \ 1429 { \ 1430 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1431 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1432 } \ 1433 static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1434 const type *s) \ 1435 { \ 1436 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1437 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1438 } \ 1439 static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1440 type *s, u##bits val) \ 1441 { \ 1442 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1443 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1444 } 1445 1446 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1447 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1448 { \ 1449 const type *p = page_address(eb->pages[0]); \ 1450 u##bits res = le##bits##_to_cpu(p->member); \ 1451 return res; \ 1452 } \ 1453 static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1454 u##bits val) \ 1455 { \ 1456 type *p = page_address(eb->pages[0]); \ 1457 p->member = cpu_to_le##bits(val); \ 1458 } 1459 1460 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1461 static inline u##bits btrfs_##name(const type *s) \ 1462 { \ 1463 return le##bits##_to_cpu(s->member); \ 1464 } \ 1465 static inline void btrfs_set_##name(type *s, u##bits val) \ 1466 { \ 1467 s->member = cpu_to_le##bits(val); \ 1468 } 1469 1470 1471 static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1472 struct btrfs_dev_item *s) 1473 { 1474 BUILD_BUG_ON(sizeof(u64) != 1475 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1476 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1477 total_bytes)); 1478 } 1479 static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1480 struct btrfs_dev_item *s, 1481 u64 val) 1482 { 1483 BUILD_BUG_ON(sizeof(u64) != 1484 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1485 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1486 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1487 } 1488 1489 1490 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1491 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1492 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1493 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1494 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1495 start_offset, 64); 1496 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1497 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1498 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1499 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1500 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1501 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1502 1503 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1504 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1505 total_bytes, 64); 1506 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1507 bytes_used, 64); 1508 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1509 io_align, 32); 1510 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1511 io_width, 32); 1512 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1513 sector_size, 32); 1514 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1515 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1516 dev_group, 32); 1517 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1518 seek_speed, 8); 1519 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1520 bandwidth, 8); 1521 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1522 generation, 64); 1523 1524 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1525 { 1526 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1527 } 1528 1529 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1530 { 1531 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1532 } 1533 1534 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1535 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1536 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1537 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1538 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1539 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1540 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1541 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1542 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1543 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1544 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1545 1546 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1547 { 1548 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1549 } 1550 1551 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1552 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1553 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1554 stripe_len, 64); 1555 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1556 io_align, 32); 1557 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1558 io_width, 32); 1559 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1560 sector_size, 32); 1561 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1562 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1563 num_stripes, 16); 1564 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1565 sub_stripes, 16); 1566 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1567 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1568 1569 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1570 int nr) 1571 { 1572 unsigned long offset = (unsigned long)c; 1573 offset += offsetof(struct btrfs_chunk, stripe); 1574 offset += nr * sizeof(struct btrfs_stripe); 1575 return (struct btrfs_stripe *)offset; 1576 } 1577 1578 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1579 { 1580 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1581 } 1582 1583 static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1584 struct btrfs_chunk *c, int nr) 1585 { 1586 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1587 } 1588 1589 static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1590 struct btrfs_chunk *c, int nr) 1591 { 1592 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1593 } 1594 1595 /* struct btrfs_block_group_item */ 1596 BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1597 used, 64); 1598 BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1599 used, 64); 1600 BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1601 struct btrfs_block_group_item, chunk_objectid, 64); 1602 1603 BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1604 struct btrfs_block_group_item, chunk_objectid, 64); 1605 BTRFS_SETGET_FUNCS(block_group_flags, 1606 struct btrfs_block_group_item, flags, 64); 1607 BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1608 struct btrfs_block_group_item, flags, 64); 1609 1610 /* struct btrfs_free_space_info */ 1611 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1612 extent_count, 32); 1613 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1614 1615 /* struct btrfs_inode_ref */ 1616 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1617 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1618 1619 /* struct btrfs_inode_extref */ 1620 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1621 parent_objectid, 64); 1622 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1623 name_len, 16); 1624 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1625 1626 /* struct btrfs_inode_item */ 1627 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1628 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1629 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1630 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1631 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1632 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1633 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1634 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1635 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1636 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1637 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1638 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1639 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1640 generation, 64); 1641 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1642 sequence, 64); 1643 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1644 transid, 64); 1645 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1646 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1647 nbytes, 64); 1648 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1649 block_group, 64); 1650 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1651 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1652 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1653 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1654 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1655 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1656 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1657 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1658 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1659 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1660 1661 /* struct btrfs_dev_extent */ 1662 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1663 chunk_tree, 64); 1664 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1665 chunk_objectid, 64); 1666 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1667 chunk_offset, 64); 1668 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1669 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1670 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1671 generation, 64); 1672 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1673 1674 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1675 1676 static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1677 struct btrfs_tree_block_info *item, 1678 struct btrfs_disk_key *key) 1679 { 1680 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1681 } 1682 1683 static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1684 struct btrfs_tree_block_info *item, 1685 struct btrfs_disk_key *key) 1686 { 1687 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1688 } 1689 1690 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1691 root, 64); 1692 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1693 objectid, 64); 1694 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1695 offset, 64); 1696 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1697 count, 32); 1698 1699 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1700 count, 32); 1701 1702 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1703 type, 8); 1704 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1705 offset, 64); 1706 1707 static inline u32 btrfs_extent_inline_ref_size(int type) 1708 { 1709 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1710 type == BTRFS_SHARED_BLOCK_REF_KEY) 1711 return sizeof(struct btrfs_extent_inline_ref); 1712 if (type == BTRFS_SHARED_DATA_REF_KEY) 1713 return sizeof(struct btrfs_shared_data_ref) + 1714 sizeof(struct btrfs_extent_inline_ref); 1715 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1716 return sizeof(struct btrfs_extent_data_ref) + 1717 offsetof(struct btrfs_extent_inline_ref, offset); 1718 return 0; 1719 } 1720 1721 /* struct btrfs_node */ 1722 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1723 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1724 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1725 blockptr, 64); 1726 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1727 generation, 64); 1728 1729 static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1730 { 1731 unsigned long ptr; 1732 ptr = offsetof(struct btrfs_node, ptrs) + 1733 sizeof(struct btrfs_key_ptr) * nr; 1734 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1735 } 1736 1737 static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1738 int nr, u64 val) 1739 { 1740 unsigned long ptr; 1741 ptr = offsetof(struct btrfs_node, ptrs) + 1742 sizeof(struct btrfs_key_ptr) * nr; 1743 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1744 } 1745 1746 static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1747 { 1748 unsigned long ptr; 1749 ptr = offsetof(struct btrfs_node, ptrs) + 1750 sizeof(struct btrfs_key_ptr) * nr; 1751 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1752 } 1753 1754 static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1755 int nr, u64 val) 1756 { 1757 unsigned long ptr; 1758 ptr = offsetof(struct btrfs_node, ptrs) + 1759 sizeof(struct btrfs_key_ptr) * nr; 1760 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1761 } 1762 1763 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1764 { 1765 return offsetof(struct btrfs_node, ptrs) + 1766 sizeof(struct btrfs_key_ptr) * nr; 1767 } 1768 1769 void btrfs_node_key(const struct extent_buffer *eb, 1770 struct btrfs_disk_key *disk_key, int nr); 1771 1772 static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1773 struct btrfs_disk_key *disk_key, int nr) 1774 { 1775 unsigned long ptr; 1776 ptr = btrfs_node_key_ptr_offset(nr); 1777 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1778 struct btrfs_key_ptr, key, disk_key); 1779 } 1780 1781 /* struct btrfs_item */ 1782 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1783 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1784 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1785 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1786 1787 static inline unsigned long btrfs_item_nr_offset(int nr) 1788 { 1789 return offsetof(struct btrfs_leaf, items) + 1790 sizeof(struct btrfs_item) * nr; 1791 } 1792 1793 static inline struct btrfs_item *btrfs_item_nr(int nr) 1794 { 1795 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1796 } 1797 1798 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1799 struct btrfs_item *item) 1800 { 1801 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1802 } 1803 1804 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1805 { 1806 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1807 } 1808 1809 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1810 { 1811 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1812 } 1813 1814 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1815 { 1816 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1817 } 1818 1819 static inline void btrfs_item_key(const struct extent_buffer *eb, 1820 struct btrfs_disk_key *disk_key, int nr) 1821 { 1822 struct btrfs_item *item = btrfs_item_nr(nr); 1823 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1824 } 1825 1826 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1827 struct btrfs_disk_key *disk_key, int nr) 1828 { 1829 struct btrfs_item *item = btrfs_item_nr(nr); 1830 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1831 } 1832 1833 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1834 1835 /* 1836 * struct btrfs_root_ref 1837 */ 1838 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1839 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1840 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1841 1842 /* struct btrfs_dir_item */ 1843 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1844 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1845 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1846 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1847 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1848 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1849 data_len, 16); 1850 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1851 name_len, 16); 1852 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1853 transid, 64); 1854 1855 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1856 const struct btrfs_dir_item *item, 1857 struct btrfs_disk_key *key) 1858 { 1859 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1860 } 1861 1862 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1863 struct btrfs_dir_item *item, 1864 const struct btrfs_disk_key *key) 1865 { 1866 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1867 } 1868 1869 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1870 num_entries, 64); 1871 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1872 num_bitmaps, 64); 1873 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1874 generation, 64); 1875 1876 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1877 const struct btrfs_free_space_header *h, 1878 struct btrfs_disk_key *key) 1879 { 1880 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1881 } 1882 1883 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1884 struct btrfs_free_space_header *h, 1885 const struct btrfs_disk_key *key) 1886 { 1887 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1888 } 1889 1890 /* struct btrfs_disk_key */ 1891 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1892 objectid, 64); 1893 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1894 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1895 1896 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1897 const struct btrfs_disk_key *disk) 1898 { 1899 cpu->offset = le64_to_cpu(disk->offset); 1900 cpu->type = disk->type; 1901 cpu->objectid = le64_to_cpu(disk->objectid); 1902 } 1903 1904 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1905 const struct btrfs_key *cpu) 1906 { 1907 disk->offset = cpu_to_le64(cpu->offset); 1908 disk->type = cpu->type; 1909 disk->objectid = cpu_to_le64(cpu->objectid); 1910 } 1911 1912 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1913 struct btrfs_key *key, int nr) 1914 { 1915 struct btrfs_disk_key disk_key; 1916 btrfs_node_key(eb, &disk_key, nr); 1917 btrfs_disk_key_to_cpu(key, &disk_key); 1918 } 1919 1920 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1921 struct btrfs_key *key, int nr) 1922 { 1923 struct btrfs_disk_key disk_key; 1924 btrfs_item_key(eb, &disk_key, nr); 1925 btrfs_disk_key_to_cpu(key, &disk_key); 1926 } 1927 1928 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1929 const struct btrfs_dir_item *item, 1930 struct btrfs_key *key) 1931 { 1932 struct btrfs_disk_key disk_key; 1933 btrfs_dir_item_key(eb, item, &disk_key); 1934 btrfs_disk_key_to_cpu(key, &disk_key); 1935 } 1936 1937 /* struct btrfs_header */ 1938 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1939 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1940 generation, 64); 1941 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1942 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1943 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1944 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1945 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 1946 generation, 64); 1947 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 1948 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 1949 nritems, 32); 1950 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 1951 1952 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 1953 { 1954 return (btrfs_header_flags(eb) & flag) == flag; 1955 } 1956 1957 static inline void btrfs_set_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 void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1964 { 1965 u64 flags = btrfs_header_flags(eb); 1966 btrfs_set_header_flags(eb, flags & ~flag); 1967 } 1968 1969 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 1970 { 1971 u64 flags = btrfs_header_flags(eb); 1972 return flags >> BTRFS_BACKREF_REV_SHIFT; 1973 } 1974 1975 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1976 int rev) 1977 { 1978 u64 flags = btrfs_header_flags(eb); 1979 flags &= ~BTRFS_BACKREF_REV_MASK; 1980 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1981 btrfs_set_header_flags(eb, flags); 1982 } 1983 1984 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 1985 { 1986 return btrfs_header_level(eb) == 0; 1987 } 1988 1989 /* struct btrfs_root_item */ 1990 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1991 generation, 64); 1992 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1993 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1994 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1995 1996 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1997 generation, 64); 1998 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1999 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2000 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2001 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2002 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2003 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2004 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2005 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2006 last_snapshot, 64); 2007 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2008 generation_v2, 64); 2009 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2010 ctransid, 64); 2011 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2012 otransid, 64); 2013 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2014 stransid, 64); 2015 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2016 rtransid, 64); 2017 2018 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2019 { 2020 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2021 } 2022 2023 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2024 { 2025 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2026 } 2027 2028 /* struct btrfs_root_backup */ 2029 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2030 tree_root, 64); 2031 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2032 tree_root_gen, 64); 2033 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2034 tree_root_level, 8); 2035 2036 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2037 chunk_root, 64); 2038 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2039 chunk_root_gen, 64); 2040 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2041 chunk_root_level, 8); 2042 2043 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2044 extent_root, 64); 2045 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2046 extent_root_gen, 64); 2047 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2048 extent_root_level, 8); 2049 2050 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2051 fs_root, 64); 2052 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2053 fs_root_gen, 64); 2054 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2055 fs_root_level, 8); 2056 2057 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2058 dev_root, 64); 2059 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2060 dev_root_gen, 64); 2061 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2062 dev_root_level, 8); 2063 2064 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2065 csum_root, 64); 2066 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2067 csum_root_gen, 64); 2068 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2069 csum_root_level, 8); 2070 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2071 total_bytes, 64); 2072 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2073 bytes_used, 64); 2074 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2075 num_devices, 64); 2076 2077 /* struct btrfs_balance_item */ 2078 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2079 2080 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2081 const struct btrfs_balance_item *bi, 2082 struct btrfs_disk_balance_args *ba) 2083 { 2084 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2085 } 2086 2087 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2088 struct btrfs_balance_item *bi, 2089 const struct btrfs_disk_balance_args *ba) 2090 { 2091 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2092 } 2093 2094 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2095 const struct btrfs_balance_item *bi, 2096 struct btrfs_disk_balance_args *ba) 2097 { 2098 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2099 } 2100 2101 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2102 struct btrfs_balance_item *bi, 2103 const struct btrfs_disk_balance_args *ba) 2104 { 2105 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2106 } 2107 2108 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2109 const struct btrfs_balance_item *bi, 2110 struct btrfs_disk_balance_args *ba) 2111 { 2112 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2113 } 2114 2115 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2116 struct btrfs_balance_item *bi, 2117 const struct btrfs_disk_balance_args *ba) 2118 { 2119 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2120 } 2121 2122 static inline void 2123 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2124 const struct btrfs_disk_balance_args *disk) 2125 { 2126 memset(cpu, 0, sizeof(*cpu)); 2127 2128 cpu->profiles = le64_to_cpu(disk->profiles); 2129 cpu->usage = le64_to_cpu(disk->usage); 2130 cpu->devid = le64_to_cpu(disk->devid); 2131 cpu->pstart = le64_to_cpu(disk->pstart); 2132 cpu->pend = le64_to_cpu(disk->pend); 2133 cpu->vstart = le64_to_cpu(disk->vstart); 2134 cpu->vend = le64_to_cpu(disk->vend); 2135 cpu->target = le64_to_cpu(disk->target); 2136 cpu->flags = le64_to_cpu(disk->flags); 2137 cpu->limit = le64_to_cpu(disk->limit); 2138 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2139 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2140 } 2141 2142 static inline void 2143 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2144 const struct btrfs_balance_args *cpu) 2145 { 2146 memset(disk, 0, sizeof(*disk)); 2147 2148 disk->profiles = cpu_to_le64(cpu->profiles); 2149 disk->usage = cpu_to_le64(cpu->usage); 2150 disk->devid = cpu_to_le64(cpu->devid); 2151 disk->pstart = cpu_to_le64(cpu->pstart); 2152 disk->pend = cpu_to_le64(cpu->pend); 2153 disk->vstart = cpu_to_le64(cpu->vstart); 2154 disk->vend = cpu_to_le64(cpu->vend); 2155 disk->target = cpu_to_le64(cpu->target); 2156 disk->flags = cpu_to_le64(cpu->flags); 2157 disk->limit = cpu_to_le64(cpu->limit); 2158 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2159 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2160 } 2161 2162 /* struct btrfs_super_block */ 2163 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2164 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2165 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2166 generation, 64); 2167 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2168 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2169 struct btrfs_super_block, sys_chunk_array_size, 32); 2170 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2171 struct btrfs_super_block, chunk_root_generation, 64); 2172 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2173 root_level, 8); 2174 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2175 chunk_root, 64); 2176 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2177 chunk_root_level, 8); 2178 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2179 log_root, 64); 2180 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2181 log_root_transid, 64); 2182 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2183 log_root_level, 8); 2184 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2185 total_bytes, 64); 2186 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2187 bytes_used, 64); 2188 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2189 sectorsize, 32); 2190 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2191 nodesize, 32); 2192 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2193 stripesize, 32); 2194 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2195 root_dir_objectid, 64); 2196 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2197 num_devices, 64); 2198 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2199 compat_flags, 64); 2200 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2201 compat_ro_flags, 64); 2202 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2203 incompat_flags, 64); 2204 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2205 csum_type, 16); 2206 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2207 cache_generation, 64); 2208 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2209 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2210 uuid_tree_generation, 64); 2211 2212 int btrfs_super_csum_size(const struct btrfs_super_block *s); 2213 const char *btrfs_super_csum_name(u16 csum_type); 2214 const char *btrfs_super_csum_driver(u16 csum_type); 2215 size_t __const btrfs_get_num_csums(void); 2216 2217 2218 /* 2219 * The leaf data grows from end-to-front in the node. 2220 * this returns the address of the start of the last item, 2221 * which is the stop of the leaf data stack 2222 */ 2223 static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2224 { 2225 u32 nr = btrfs_header_nritems(leaf); 2226 2227 if (nr == 0) 2228 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2229 return btrfs_item_offset_nr(leaf, nr - 1); 2230 } 2231 2232 /* struct btrfs_file_extent_item */ 2233 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2234 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2235 struct btrfs_file_extent_item, disk_bytenr, 64); 2236 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2237 struct btrfs_file_extent_item, offset, 64); 2238 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2239 struct btrfs_file_extent_item, generation, 64); 2240 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2241 struct btrfs_file_extent_item, num_bytes, 64); 2242 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2243 struct btrfs_file_extent_item, disk_num_bytes, 64); 2244 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2245 struct btrfs_file_extent_item, compression, 8); 2246 2247 static inline unsigned long 2248 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2249 { 2250 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2251 } 2252 2253 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2254 { 2255 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2256 } 2257 2258 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2259 disk_bytenr, 64); 2260 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2261 generation, 64); 2262 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2263 disk_num_bytes, 64); 2264 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2265 offset, 64); 2266 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2267 num_bytes, 64); 2268 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2269 ram_bytes, 64); 2270 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2271 compression, 8); 2272 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2273 encryption, 8); 2274 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2275 other_encoding, 16); 2276 2277 /* 2278 * this returns the number of bytes used by the item on disk, minus the 2279 * size of any extent headers. If a file is compressed on disk, this is 2280 * the compressed size 2281 */ 2282 static inline u32 btrfs_file_extent_inline_item_len( 2283 const struct extent_buffer *eb, 2284 struct btrfs_item *e) 2285 { 2286 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2287 } 2288 2289 /* btrfs_qgroup_status_item */ 2290 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2291 generation, 64); 2292 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2293 version, 64); 2294 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2295 flags, 64); 2296 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2297 rescan, 64); 2298 2299 /* btrfs_qgroup_info_item */ 2300 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2301 generation, 64); 2302 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2303 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2304 rfer_cmpr, 64); 2305 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2306 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2307 excl_cmpr, 64); 2308 2309 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2310 struct btrfs_qgroup_info_item, generation, 64); 2311 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2312 rfer, 64); 2313 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2314 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2315 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2316 excl, 64); 2317 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2318 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2319 2320 /* btrfs_qgroup_limit_item */ 2321 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2322 flags, 64); 2323 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2324 max_rfer, 64); 2325 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2326 max_excl, 64); 2327 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2328 rsv_rfer, 64); 2329 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2330 rsv_excl, 64); 2331 2332 /* btrfs_dev_replace_item */ 2333 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2334 struct btrfs_dev_replace_item, src_devid, 64); 2335 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2336 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2337 64); 2338 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2339 replace_state, 64); 2340 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2341 time_started, 64); 2342 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2343 time_stopped, 64); 2344 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2345 num_write_errors, 64); 2346 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2347 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2348 64); 2349 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2350 cursor_left, 64); 2351 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2352 cursor_right, 64); 2353 2354 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2355 struct btrfs_dev_replace_item, src_devid, 64); 2356 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2357 struct btrfs_dev_replace_item, 2358 cont_reading_from_srcdev_mode, 64); 2359 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2360 struct btrfs_dev_replace_item, replace_state, 64); 2361 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2362 struct btrfs_dev_replace_item, time_started, 64); 2363 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2364 struct btrfs_dev_replace_item, time_stopped, 64); 2365 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2366 struct btrfs_dev_replace_item, num_write_errors, 64); 2367 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2368 struct btrfs_dev_replace_item, 2369 num_uncorrectable_read_errors, 64); 2370 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2371 struct btrfs_dev_replace_item, cursor_left, 64); 2372 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2373 struct btrfs_dev_replace_item, cursor_right, 64); 2374 2375 /* helper function to cast into the data area of the leaf. */ 2376 #define btrfs_item_ptr(leaf, slot, type) \ 2377 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2378 btrfs_item_offset_nr(leaf, slot))) 2379 2380 #define btrfs_item_ptr_offset(leaf, slot) \ 2381 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2382 btrfs_item_offset_nr(leaf, slot))) 2383 2384 static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2385 { 2386 return crc32c(crc, address, length); 2387 } 2388 2389 static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2390 { 2391 put_unaligned_le32(~crc, result); 2392 } 2393 2394 static inline u64 btrfs_name_hash(const char *name, int len) 2395 { 2396 return crc32c((u32)~1, name, len); 2397 } 2398 2399 /* 2400 * Figure the key offset of an extended inode ref 2401 */ 2402 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2403 int len) 2404 { 2405 return (u64) crc32c(parent_objectid, name, len); 2406 } 2407 2408 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2409 { 2410 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2411 } 2412 2413 /* extent-tree.c */ 2414 2415 enum btrfs_inline_ref_type { 2416 BTRFS_REF_TYPE_INVALID, 2417 BTRFS_REF_TYPE_BLOCK, 2418 BTRFS_REF_TYPE_DATA, 2419 BTRFS_REF_TYPE_ANY, 2420 }; 2421 2422 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2423 struct btrfs_extent_inline_ref *iref, 2424 enum btrfs_inline_ref_type is_data); 2425 u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2426 2427 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2428 2429 /* 2430 * Use this if we would be adding new items, as we could split nodes as we cow 2431 * down the tree. 2432 */ 2433 static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2434 unsigned num_items) 2435 { 2436 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2437 } 2438 2439 /* 2440 * Doing a truncate or a modification won't result in new nodes or leaves, just 2441 * what we need for COW. 2442 */ 2443 static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2444 unsigned num_items) 2445 { 2446 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2447 } 2448 2449 int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2450 u64 start, u64 num_bytes); 2451 void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2452 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2453 unsigned long count); 2454 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2455 struct btrfs_delayed_ref_root *delayed_refs, 2456 struct btrfs_delayed_ref_head *head); 2457 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2458 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2459 struct btrfs_fs_info *fs_info, u64 bytenr, 2460 u64 offset, int metadata, u64 *refs, u64 *flags); 2461 int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2462 int reserved); 2463 int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2464 u64 bytenr, u64 num_bytes); 2465 int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2466 int btrfs_cross_ref_exist(struct btrfs_root *root, 2467 u64 objectid, u64 offset, u64 bytenr); 2468 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2469 struct btrfs_root *root, 2470 u64 parent, u64 root_objectid, 2471 const struct btrfs_disk_key *key, 2472 int level, u64 hint, 2473 u64 empty_size); 2474 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2475 struct btrfs_root *root, 2476 struct extent_buffer *buf, 2477 u64 parent, int last_ref); 2478 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2479 struct btrfs_root *root, u64 owner, 2480 u64 offset, u64 ram_bytes, 2481 struct btrfs_key *ins); 2482 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2483 u64 root_objectid, u64 owner, u64 offset, 2484 struct btrfs_key *ins); 2485 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2486 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2487 struct btrfs_key *ins, int is_data, int delalloc); 2488 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2489 struct extent_buffer *buf, int full_backref); 2490 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2491 struct extent_buffer *buf, int full_backref); 2492 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2493 struct extent_buffer *eb, u64 flags, 2494 int level, int is_data); 2495 int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2496 2497 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2498 u64 start, u64 len, int delalloc); 2499 int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2500 u64 len); 2501 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2502 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2503 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2504 struct btrfs_ref *generic_ref); 2505 2506 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2507 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2508 2509 enum btrfs_reserve_flush_enum { 2510 /* If we are in the transaction, we can't flush anything.*/ 2511 BTRFS_RESERVE_NO_FLUSH, 2512 /* 2513 * Flushing delalloc may cause deadlock somewhere, in this 2514 * case, use FLUSH LIMIT 2515 */ 2516 BTRFS_RESERVE_FLUSH_LIMIT, 2517 BTRFS_RESERVE_FLUSH_EVICT, 2518 BTRFS_RESERVE_FLUSH_ALL, 2519 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2520 }; 2521 2522 enum btrfs_flush_state { 2523 FLUSH_DELAYED_ITEMS_NR = 1, 2524 FLUSH_DELAYED_ITEMS = 2, 2525 FLUSH_DELAYED_REFS_NR = 3, 2526 FLUSH_DELAYED_REFS = 4, 2527 FLUSH_DELALLOC = 5, 2528 FLUSH_DELALLOC_WAIT = 6, 2529 ALLOC_CHUNK = 7, 2530 ALLOC_CHUNK_FORCE = 8, 2531 RUN_DELAYED_IPUTS = 9, 2532 COMMIT_TRANS = 10, 2533 }; 2534 2535 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2536 struct btrfs_block_rsv *rsv, 2537 int nitems, bool use_global_rsv); 2538 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2539 struct btrfs_block_rsv *rsv); 2540 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2541 2542 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2543 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2544 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2545 u64 start, u64 end); 2546 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2547 u64 num_bytes, u64 *actual_bytes); 2548 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2549 2550 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2551 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2552 struct btrfs_fs_info *fs_info); 2553 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2554 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2555 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2556 2557 /* ctree.c */ 2558 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2559 int *slot); 2560 int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2561 int btrfs_previous_item(struct btrfs_root *root, 2562 struct btrfs_path *path, u64 min_objectid, 2563 int type); 2564 int btrfs_previous_extent_item(struct btrfs_root *root, 2565 struct btrfs_path *path, u64 min_objectid); 2566 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2567 struct btrfs_path *path, 2568 const struct btrfs_key *new_key); 2569 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2570 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2571 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2572 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2573 struct btrfs_key *key, int lowest_level, 2574 u64 min_trans); 2575 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2576 struct btrfs_path *path, 2577 u64 min_trans); 2578 struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2579 int slot); 2580 2581 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2582 struct btrfs_root *root, struct extent_buffer *buf, 2583 struct extent_buffer *parent, int parent_slot, 2584 struct extent_buffer **cow_ret); 2585 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2586 struct btrfs_root *root, 2587 struct extent_buffer *buf, 2588 struct extent_buffer **cow_ret, u64 new_root_objectid); 2589 int btrfs_block_can_be_shared(struct btrfs_root *root, 2590 struct extent_buffer *buf); 2591 void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2592 void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2593 int btrfs_split_item(struct btrfs_trans_handle *trans, 2594 struct btrfs_root *root, 2595 struct btrfs_path *path, 2596 const struct btrfs_key *new_key, 2597 unsigned long split_offset); 2598 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2599 struct btrfs_root *root, 2600 struct btrfs_path *path, 2601 const struct btrfs_key *new_key); 2602 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2603 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2604 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2605 const struct btrfs_key *key, struct btrfs_path *p, 2606 int ins_len, int cow); 2607 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2608 struct btrfs_path *p, u64 time_seq); 2609 int btrfs_search_slot_for_read(struct btrfs_root *root, 2610 const struct btrfs_key *key, 2611 struct btrfs_path *p, int find_higher, 2612 int return_any); 2613 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2614 struct btrfs_root *root, struct extent_buffer *parent, 2615 int start_slot, u64 *last_ret, 2616 struct btrfs_key *progress); 2617 void btrfs_release_path(struct btrfs_path *p); 2618 struct btrfs_path *btrfs_alloc_path(void); 2619 void btrfs_free_path(struct btrfs_path *p); 2620 2621 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2622 struct btrfs_path *path, int slot, int nr); 2623 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2624 struct btrfs_root *root, 2625 struct btrfs_path *path) 2626 { 2627 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2628 } 2629 2630 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2631 const struct btrfs_key *cpu_key, u32 *data_size, 2632 u32 total_data, u32 total_size, int nr); 2633 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2634 const struct btrfs_key *key, void *data, u32 data_size); 2635 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2636 struct btrfs_root *root, 2637 struct btrfs_path *path, 2638 const struct btrfs_key *cpu_key, u32 *data_size, 2639 int nr); 2640 2641 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2642 struct btrfs_root *root, 2643 struct btrfs_path *path, 2644 const struct btrfs_key *key, 2645 u32 data_size) 2646 { 2647 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2648 } 2649 2650 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2651 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2652 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2653 u64 time_seq); 2654 static inline int btrfs_next_old_item(struct btrfs_root *root, 2655 struct btrfs_path *p, u64 time_seq) 2656 { 2657 ++p->slots[0]; 2658 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2659 return btrfs_next_old_leaf(root, p, time_seq); 2660 return 0; 2661 } 2662 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2663 { 2664 return btrfs_next_old_item(root, p, 0); 2665 } 2666 int btrfs_leaf_free_space(struct extent_buffer *leaf); 2667 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2668 int for_reloc); 2669 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2670 struct btrfs_root *root, 2671 struct extent_buffer *node, 2672 struct extent_buffer *parent); 2673 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2674 { 2675 /* 2676 * Do it this way so we only ever do one test_bit in the normal case. 2677 */ 2678 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2679 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2680 return 2; 2681 return 1; 2682 } 2683 return 0; 2684 } 2685 2686 /* 2687 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2688 * anything except sleeping. This function is used to check the status of 2689 * the fs. 2690 */ 2691 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2692 { 2693 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2694 } 2695 2696 /* tree mod log functions from ctree.c */ 2697 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2698 struct seq_list *elem); 2699 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2700 struct seq_list *elem); 2701 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2702 2703 /* root-item.c */ 2704 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2705 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2706 int name_len); 2707 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2708 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2709 int name_len); 2710 int btrfs_del_root(struct btrfs_trans_handle *trans, 2711 const struct btrfs_key *key); 2712 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2713 const struct btrfs_key *key, 2714 struct btrfs_root_item *item); 2715 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2716 struct btrfs_root *root, 2717 struct btrfs_key *key, 2718 struct btrfs_root_item *item); 2719 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2720 struct btrfs_path *path, struct btrfs_root_item *root_item, 2721 struct btrfs_key *root_key); 2722 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2723 void btrfs_set_root_node(struct btrfs_root_item *item, 2724 struct extent_buffer *node); 2725 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2726 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2727 struct btrfs_root *root); 2728 2729 /* uuid-tree.c */ 2730 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2731 u64 subid); 2732 int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2733 u64 subid); 2734 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2735 2736 /* dir-item.c */ 2737 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2738 const char *name, int name_len); 2739 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2740 int name_len, struct btrfs_inode *dir, 2741 struct btrfs_key *location, u8 type, u64 index); 2742 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2743 struct btrfs_root *root, 2744 struct btrfs_path *path, u64 dir, 2745 const char *name, int name_len, 2746 int mod); 2747 struct btrfs_dir_item * 2748 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2749 struct btrfs_root *root, 2750 struct btrfs_path *path, u64 dir, 2751 u64 objectid, const char *name, int name_len, 2752 int mod); 2753 struct btrfs_dir_item * 2754 btrfs_search_dir_index_item(struct btrfs_root *root, 2755 struct btrfs_path *path, u64 dirid, 2756 const char *name, int name_len); 2757 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2758 struct btrfs_root *root, 2759 struct btrfs_path *path, 2760 struct btrfs_dir_item *di); 2761 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2762 struct btrfs_root *root, 2763 struct btrfs_path *path, u64 objectid, 2764 const char *name, u16 name_len, 2765 const void *data, u16 data_len); 2766 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2767 struct btrfs_root *root, 2768 struct btrfs_path *path, u64 dir, 2769 const char *name, u16 name_len, 2770 int mod); 2771 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2772 struct btrfs_path *path, 2773 const char *name, 2774 int name_len); 2775 2776 /* orphan.c */ 2777 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2778 struct btrfs_root *root, u64 offset); 2779 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2780 struct btrfs_root *root, u64 offset); 2781 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2782 2783 /* inode-item.c */ 2784 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2785 struct btrfs_root *root, 2786 const char *name, int name_len, 2787 u64 inode_objectid, u64 ref_objectid, u64 index); 2788 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2789 struct btrfs_root *root, 2790 const char *name, int name_len, 2791 u64 inode_objectid, u64 ref_objectid, u64 *index); 2792 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2793 struct btrfs_root *root, 2794 struct btrfs_path *path, u64 objectid); 2795 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2796 *root, struct btrfs_path *path, 2797 struct btrfs_key *location, int mod); 2798 2799 struct btrfs_inode_extref * 2800 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2801 struct btrfs_root *root, 2802 struct btrfs_path *path, 2803 const char *name, int name_len, 2804 u64 inode_objectid, u64 ref_objectid, int ins_len, 2805 int cow); 2806 2807 struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2808 int slot, const char *name, 2809 int name_len); 2810 struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2811 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2812 const char *name, int name_len); 2813 /* file-item.c */ 2814 struct btrfs_dio_private; 2815 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2816 struct btrfs_root *root, u64 bytenr, u64 len); 2817 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2818 u64 offset, u8 *dst); 2819 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2820 struct btrfs_root *root, 2821 u64 objectid, u64 pos, 2822 u64 disk_offset, u64 disk_num_bytes, 2823 u64 num_bytes, u64 offset, u64 ram_bytes, 2824 u8 compression, u8 encryption, u16 other_encoding); 2825 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2826 struct btrfs_root *root, 2827 struct btrfs_path *path, u64 objectid, 2828 u64 bytenr, int mod); 2829 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2830 struct btrfs_root *root, 2831 struct btrfs_ordered_sum *sums); 2832 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 2833 u64 file_start, int contig); 2834 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2835 struct list_head *list, int search_commit); 2836 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2837 const struct btrfs_path *path, 2838 struct btrfs_file_extent_item *fi, 2839 const bool new_inline, 2840 struct extent_map *em); 2841 int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 2842 u64 len); 2843 int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 2844 u64 len); 2845 void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size); 2846 u64 btrfs_file_extent_end(const struct btrfs_path *path); 2847 2848 /* inode.c */ 2849 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2850 u64 start, u64 len); 2851 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2852 u64 *orig_start, u64 *orig_block_len, 2853 u64 *ram_bytes); 2854 2855 void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2856 struct btrfs_inode *inode); 2857 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2858 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2859 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2860 struct btrfs_root *root, 2861 struct btrfs_inode *dir, struct btrfs_inode *inode, 2862 const char *name, int name_len); 2863 int btrfs_add_link(struct btrfs_trans_handle *trans, 2864 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 2865 const char *name, int name_len, int add_backref, u64 index); 2866 int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 2867 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 2868 int front); 2869 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2870 struct btrfs_root *root, 2871 struct inode *inode, u64 new_size, 2872 u32 min_type); 2873 2874 int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 2875 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); 2876 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2877 unsigned int extra_bits, 2878 struct extent_state **cached_state); 2879 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2880 struct btrfs_root *new_root, 2881 struct btrfs_root *parent_root, 2882 u64 new_dirid); 2883 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 2884 unsigned *bits); 2885 void btrfs_clear_delalloc_extent(struct inode *inode, 2886 struct extent_state *state, unsigned *bits); 2887 void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 2888 struct extent_state *other); 2889 void btrfs_split_delalloc_extent(struct inode *inode, 2890 struct extent_state *orig, u64 split); 2891 int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 2892 unsigned long bio_flags); 2893 void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 2894 vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 2895 int btrfs_readpage(struct file *file, struct page *page); 2896 void btrfs_evict_inode(struct inode *inode); 2897 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2898 struct inode *btrfs_alloc_inode(struct super_block *sb); 2899 void btrfs_destroy_inode(struct inode *inode); 2900 void btrfs_free_inode(struct inode *inode); 2901 int btrfs_drop_inode(struct inode *inode); 2902 int __init btrfs_init_cachep(void); 2903 void __cold btrfs_destroy_cachep(void); 2904 struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 2905 struct btrfs_root *root, struct btrfs_path *path); 2906 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 2907 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 2908 struct page *page, size_t pg_offset, 2909 u64 start, u64 end); 2910 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2911 struct btrfs_root *root, 2912 struct inode *inode); 2913 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 2914 struct btrfs_root *root, struct inode *inode); 2915 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 2916 struct btrfs_inode *inode); 2917 int btrfs_orphan_cleanup(struct btrfs_root *root); 2918 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 2919 void btrfs_add_delayed_iput(struct inode *inode); 2920 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 2921 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 2922 int btrfs_prealloc_file_range(struct inode *inode, int mode, 2923 u64 start, u64 num_bytes, u64 min_size, 2924 loff_t actual_len, u64 *alloc_hint); 2925 int btrfs_prealloc_file_range_trans(struct inode *inode, 2926 struct btrfs_trans_handle *trans, int mode, 2927 u64 start, u64 num_bytes, u64 min_size, 2928 loff_t actual_len, u64 *alloc_hint); 2929 int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, 2930 u64 start, u64 end, int *page_started, unsigned long *nr_written, 2931 struct writeback_control *wbc); 2932 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 2933 void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 2934 u64 end, int uptodate); 2935 extern const struct dentry_operations btrfs_dentry_operations; 2936 2937 /* ioctl.c */ 2938 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2939 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2940 int btrfs_ioctl_get_supported_features(void __user *arg); 2941 void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 2942 int __pure btrfs_is_empty_uuid(u8 *uuid); 2943 int btrfs_defrag_file(struct inode *inode, struct file *file, 2944 struct btrfs_ioctl_defrag_range_args *range, 2945 u64 newer_than, unsigned long max_pages); 2946 void btrfs_get_block_group_info(struct list_head *groups_list, 2947 struct btrfs_ioctl_space_info *space); 2948 void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 2949 struct btrfs_ioctl_balance_args *bargs); 2950 2951 /* file.c */ 2952 int __init btrfs_auto_defrag_init(void); 2953 void __cold btrfs_auto_defrag_exit(void); 2954 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 2955 struct btrfs_inode *inode); 2956 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 2957 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 2958 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 2959 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 2960 int skip_pinned); 2961 extern const struct file_operations btrfs_file_operations; 2962 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 2963 struct btrfs_root *root, struct inode *inode, 2964 struct btrfs_path *path, u64 start, u64 end, 2965 u64 *drop_end, int drop_cache, 2966 int replace_extent, 2967 u32 extent_item_size, 2968 int *key_inserted); 2969 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 2970 struct btrfs_root *root, struct inode *inode, u64 start, 2971 u64 end, int drop_cache); 2972 int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, 2973 const u64 start, const u64 end, 2974 struct btrfs_clone_extent_info *clone_info, 2975 struct btrfs_trans_handle **trans_out); 2976 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2977 struct btrfs_inode *inode, u64 start, u64 end); 2978 int btrfs_release_file(struct inode *inode, struct file *file); 2979 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 2980 size_t num_pages, loff_t pos, size_t write_bytes, 2981 struct extent_state **cached); 2982 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 2983 2984 /* tree-defrag.c */ 2985 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2986 struct btrfs_root *root); 2987 2988 /* super.c */ 2989 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 2990 unsigned long new_flags); 2991 int btrfs_sync_fs(struct super_block *sb, int wait); 2992 char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 2993 u64 subvol_objectid); 2994 2995 static inline __printf(2, 3) __cold 2996 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 2997 { 2998 } 2999 3000 #ifdef CONFIG_PRINTK 3001 __printf(2, 3) 3002 __cold 3003 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3004 #else 3005 #define btrfs_printk(fs_info, fmt, args...) \ 3006 btrfs_no_printk(fs_info, fmt, ##args) 3007 #endif 3008 3009 #define btrfs_emerg(fs_info, fmt, args...) \ 3010 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3011 #define btrfs_alert(fs_info, fmt, args...) \ 3012 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3013 #define btrfs_crit(fs_info, fmt, args...) \ 3014 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3015 #define btrfs_err(fs_info, fmt, args...) \ 3016 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3017 #define btrfs_warn(fs_info, fmt, args...) \ 3018 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3019 #define btrfs_notice(fs_info, fmt, args...) \ 3020 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3021 #define btrfs_info(fs_info, fmt, args...) \ 3022 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3023 3024 /* 3025 * Wrappers that use printk_in_rcu 3026 */ 3027 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3028 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3029 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3030 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3031 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3032 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3033 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3034 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3035 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3036 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3037 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3038 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3039 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3040 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3041 3042 /* 3043 * Wrappers that use a ratelimited printk_in_rcu 3044 */ 3045 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3046 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3047 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3048 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3049 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3050 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3051 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3052 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3053 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3054 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3055 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3056 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3057 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3058 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3059 3060 /* 3061 * Wrappers that use a ratelimited printk 3062 */ 3063 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3064 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3065 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3066 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3067 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3068 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3069 #define btrfs_err_rl(fs_info, fmt, args...) \ 3070 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3071 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3072 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3073 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3074 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3075 #define btrfs_info_rl(fs_info, fmt, args...) \ 3076 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3077 3078 #if defined(CONFIG_DYNAMIC_DEBUG) 3079 #define btrfs_debug(fs_info, fmt, args...) \ 3080 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3081 fs_info, KERN_DEBUG fmt, ##args) 3082 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3083 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3084 fs_info, KERN_DEBUG fmt, ##args) 3085 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3086 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3087 fs_info, KERN_DEBUG fmt, ##args) 3088 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3089 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3090 fs_info, KERN_DEBUG fmt, ##args) 3091 #elif defined(DEBUG) 3092 #define btrfs_debug(fs_info, fmt, args...) \ 3093 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3094 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3095 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3096 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3097 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3098 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3099 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3100 #else 3101 #define btrfs_debug(fs_info, fmt, args...) \ 3102 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3103 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3104 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3105 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3106 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3107 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3108 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3109 #endif 3110 3111 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3112 do { \ 3113 rcu_read_lock(); \ 3114 btrfs_printk(fs_info, fmt, ##args); \ 3115 rcu_read_unlock(); \ 3116 } while (0) 3117 3118 #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3119 do { \ 3120 rcu_read_lock(); \ 3121 btrfs_no_printk(fs_info, fmt, ##args); \ 3122 rcu_read_unlock(); \ 3123 } while (0) 3124 3125 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3126 do { \ 3127 static DEFINE_RATELIMIT_STATE(_rs, \ 3128 DEFAULT_RATELIMIT_INTERVAL, \ 3129 DEFAULT_RATELIMIT_BURST); \ 3130 if (__ratelimit(&_rs)) \ 3131 btrfs_printk(fs_info, fmt, ##args); \ 3132 } while (0) 3133 3134 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3135 do { \ 3136 rcu_read_lock(); \ 3137 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3138 rcu_read_unlock(); \ 3139 } while (0) 3140 3141 #ifdef CONFIG_BTRFS_ASSERT 3142 __cold __noreturn 3143 static inline void assertfail(const char *expr, const char *file, int line) 3144 { 3145 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3146 BUG(); 3147 } 3148 3149 #define ASSERT(expr) \ 3150 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3151 3152 #else 3153 static inline void assertfail(const char *expr, const char* file, int line) { } 3154 #define ASSERT(expr) (void)(expr) 3155 #endif 3156 3157 /* 3158 * Use that for functions that are conditionally exported for sanity tests but 3159 * otherwise static 3160 */ 3161 #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3162 #define EXPORT_FOR_TESTS static 3163 #else 3164 #define EXPORT_FOR_TESTS 3165 #endif 3166 3167 __cold 3168 static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3169 { 3170 btrfs_err(fs_info, 3171 "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3172 } 3173 3174 __printf(5, 6) 3175 __cold 3176 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3177 unsigned int line, int errno, const char *fmt, ...); 3178 3179 const char * __attribute_const__ btrfs_decode_error(int errno); 3180 3181 __cold 3182 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3183 const char *function, 3184 unsigned int line, int errno); 3185 3186 /* 3187 * Call btrfs_abort_transaction as early as possible when an error condition is 3188 * detected, that way the exact line number is reported. 3189 */ 3190 #define btrfs_abort_transaction(trans, errno) \ 3191 do { \ 3192 /* Report first abort since mount */ \ 3193 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3194 &((trans)->fs_info->fs_state))) { \ 3195 if ((errno) != -EIO) { \ 3196 WARN(1, KERN_DEBUG \ 3197 "BTRFS: Transaction aborted (error %d)\n", \ 3198 (errno)); \ 3199 } else { \ 3200 btrfs_debug((trans)->fs_info, \ 3201 "Transaction aborted (error %d)", \ 3202 (errno)); \ 3203 } \ 3204 } \ 3205 __btrfs_abort_transaction((trans), __func__, \ 3206 __LINE__, (errno)); \ 3207 } while (0) 3208 3209 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3210 do { \ 3211 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3212 (errno), fmt, ##args); \ 3213 } while (0) 3214 3215 __printf(5, 6) 3216 __cold 3217 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3218 unsigned int line, int errno, const char *fmt, ...); 3219 /* 3220 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3221 * will panic(). Otherwise we BUG() here. 3222 */ 3223 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3224 do { \ 3225 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3226 BUG(); \ 3227 } while (0) 3228 3229 3230 /* compatibility and incompatibility defines */ 3231 3232 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3233 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3234 #opt) 3235 3236 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3237 u64 flag, const char* name) 3238 { 3239 struct btrfs_super_block *disk_super; 3240 u64 features; 3241 3242 disk_super = fs_info->super_copy; 3243 features = btrfs_super_incompat_flags(disk_super); 3244 if (!(features & flag)) { 3245 spin_lock(&fs_info->super_lock); 3246 features = btrfs_super_incompat_flags(disk_super); 3247 if (!(features & flag)) { 3248 features |= flag; 3249 btrfs_set_super_incompat_flags(disk_super, features); 3250 btrfs_info(fs_info, 3251 "setting incompat feature flag for %s (0x%llx)", 3252 name, flag); 3253 } 3254 spin_unlock(&fs_info->super_lock); 3255 } 3256 } 3257 3258 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3259 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3260 #opt) 3261 3262 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3263 u64 flag, const char* name) 3264 { 3265 struct btrfs_super_block *disk_super; 3266 u64 features; 3267 3268 disk_super = fs_info->super_copy; 3269 features = btrfs_super_incompat_flags(disk_super); 3270 if (features & flag) { 3271 spin_lock(&fs_info->super_lock); 3272 features = btrfs_super_incompat_flags(disk_super); 3273 if (features & flag) { 3274 features &= ~flag; 3275 btrfs_set_super_incompat_flags(disk_super, features); 3276 btrfs_info(fs_info, 3277 "clearing incompat feature flag for %s (0x%llx)", 3278 name, flag); 3279 } 3280 spin_unlock(&fs_info->super_lock); 3281 } 3282 } 3283 3284 #define btrfs_fs_incompat(fs_info, opt) \ 3285 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3286 3287 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3288 { 3289 struct btrfs_super_block *disk_super; 3290 disk_super = fs_info->super_copy; 3291 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3292 } 3293 3294 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3295 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3296 #opt) 3297 3298 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3299 u64 flag, const char *name) 3300 { 3301 struct btrfs_super_block *disk_super; 3302 u64 features; 3303 3304 disk_super = fs_info->super_copy; 3305 features = btrfs_super_compat_ro_flags(disk_super); 3306 if (!(features & flag)) { 3307 spin_lock(&fs_info->super_lock); 3308 features = btrfs_super_compat_ro_flags(disk_super); 3309 if (!(features & flag)) { 3310 features |= flag; 3311 btrfs_set_super_compat_ro_flags(disk_super, features); 3312 btrfs_info(fs_info, 3313 "setting compat-ro feature flag for %s (0x%llx)", 3314 name, flag); 3315 } 3316 spin_unlock(&fs_info->super_lock); 3317 } 3318 } 3319 3320 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3321 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3322 #opt) 3323 3324 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3325 u64 flag, const char *name) 3326 { 3327 struct btrfs_super_block *disk_super; 3328 u64 features; 3329 3330 disk_super = fs_info->super_copy; 3331 features = btrfs_super_compat_ro_flags(disk_super); 3332 if (features & flag) { 3333 spin_lock(&fs_info->super_lock); 3334 features = btrfs_super_compat_ro_flags(disk_super); 3335 if (features & flag) { 3336 features &= ~flag; 3337 btrfs_set_super_compat_ro_flags(disk_super, features); 3338 btrfs_info(fs_info, 3339 "clearing compat-ro feature flag for %s (0x%llx)", 3340 name, flag); 3341 } 3342 spin_unlock(&fs_info->super_lock); 3343 } 3344 } 3345 3346 #define btrfs_fs_compat_ro(fs_info, opt) \ 3347 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3348 3349 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3350 { 3351 struct btrfs_super_block *disk_super; 3352 disk_super = fs_info->super_copy; 3353 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3354 } 3355 3356 /* acl.c */ 3357 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3358 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3359 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3360 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3361 struct inode *inode, struct inode *dir); 3362 #else 3363 #define btrfs_get_acl NULL 3364 #define btrfs_set_acl NULL 3365 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3366 struct inode *inode, struct inode *dir) 3367 { 3368 return 0; 3369 } 3370 #endif 3371 3372 /* relocation.c */ 3373 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3374 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3375 struct btrfs_root *root); 3376 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3377 struct btrfs_root *root); 3378 int btrfs_recover_relocation(struct btrfs_root *root); 3379 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3380 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3381 struct btrfs_root *root, struct extent_buffer *buf, 3382 struct extent_buffer *cow); 3383 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3384 u64 *bytes_to_reserve); 3385 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3386 struct btrfs_pending_snapshot *pending); 3387 int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3388 struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3389 u64 bytenr); 3390 int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3391 3392 /* scrub.c */ 3393 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3394 u64 end, struct btrfs_scrub_progress *progress, 3395 int readonly, int is_dev_replace); 3396 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3397 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3398 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3399 int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3400 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3401 struct btrfs_scrub_progress *progress); 3402 static inline void btrfs_init_full_stripe_locks_tree( 3403 struct btrfs_full_stripe_locks_tree *locks_root) 3404 { 3405 locks_root->root = RB_ROOT; 3406 mutex_init(&locks_root->lock); 3407 } 3408 3409 /* dev-replace.c */ 3410 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3411 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3412 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3413 3414 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3415 { 3416 btrfs_bio_counter_sub(fs_info, 1); 3417 } 3418 3419 /* reada.c */ 3420 struct reada_control { 3421 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3422 struct btrfs_key key_start; 3423 struct btrfs_key key_end; /* exclusive */ 3424 atomic_t elems; 3425 struct kref refcnt; 3426 wait_queue_head_t wait; 3427 }; 3428 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3429 struct btrfs_key *start, struct btrfs_key *end); 3430 int btrfs_reada_wait(void *handle); 3431 void btrfs_reada_detach(void *handle); 3432 int btree_readahead_hook(struct extent_buffer *eb, int err); 3433 3434 static inline int is_fstree(u64 rootid) 3435 { 3436 if (rootid == BTRFS_FS_TREE_OBJECTID || 3437 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3438 !btrfs_qgroup_level(rootid))) 3439 return 1; 3440 return 0; 3441 } 3442 3443 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3444 { 3445 return signal_pending(current); 3446 } 3447 3448 #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3449 3450 /* Sanity test specific functions */ 3451 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3452 void btrfs_test_inode_set_ops(struct inode *inode); 3453 void btrfs_test_destroy_inode(struct inode *inode); 3454 3455 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3456 { 3457 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3458 } 3459 #else 3460 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3461 { 3462 return 0; 3463 } 3464 #endif 3465 3466 #endif 3467