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 38struct btrfs_trans_handle; 39struct btrfs_transaction; 40struct btrfs_pending_snapshot; 41struct btrfs_delayed_ref_root; 42struct btrfs_space_info; 43struct btrfs_block_group; 44extern struct kmem_cache *btrfs_trans_handle_cachep; 45extern struct kmem_cache *btrfs_bit_radix_cachep; 46extern struct kmem_cache *btrfs_path_cachep; 47extern struct kmem_cache *btrfs_free_space_cachep; 48extern struct kmem_cache *btrfs_free_space_bitmap_cachep; 49struct btrfs_ordered_sum; 50struct 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 */ 117static inline u32 count_max_extents(u64 size) 118{ 119 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 120} 121 122static 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 */ 132enum { 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 */ 162struct 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 189struct 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 */ 228struct 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 */ 315struct 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 */ 328struct 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 */ 337struct btrfs_key_ptr { 338 struct btrfs_disk_key key; 339 __le64 blockptr; 340 __le64 generation; 341} __attribute__ ((__packed__)); 342 343struct 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 */ 356enum { READA_NONE, READA_BACK, READA_FORWARD }; 357struct 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 unsigned int recurse:1; 378}; 379#define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 380 sizeof(struct btrfs_item)) 381struct btrfs_dev_replace { 382 u64 replace_state; /* see #define above */ 383 time64_t time_started; /* seconds since 1-Jan-1970 */ 384 time64_t time_stopped; /* seconds since 1-Jan-1970 */ 385 atomic64_t num_write_errors; 386 atomic64_t num_uncorrectable_read_errors; 387 388 u64 cursor_left; 389 u64 committed_cursor_left; 390 u64 cursor_left_last_write_of_item; 391 u64 cursor_right; 392 393 u64 cont_reading_from_srcdev_mode; /* see #define above */ 394 395 int is_valid; 396 int item_needs_writeback; 397 struct btrfs_device *srcdev; 398 struct btrfs_device *tgtdev; 399 400 struct mutex lock_finishing_cancel_unmount; 401 struct rw_semaphore rwsem; 402 403 struct btrfs_scrub_progress scrub_progress; 404 405 struct percpu_counter bio_counter; 406 wait_queue_head_t replace_wait; 407}; 408 409/* 410 * free clusters are used to claim free space in relatively large chunks, 411 * allowing us to do less seeky writes. They are used for all metadata 412 * allocations. In ssd_spread mode they are also used for data allocations. 413 */ 414struct btrfs_free_cluster { 415 spinlock_t lock; 416 spinlock_t refill_lock; 417 struct rb_root root; 418 419 /* largest extent in this cluster */ 420 u64 max_size; 421 422 /* first extent starting offset */ 423 u64 window_start; 424 425 /* We did a full search and couldn't create a cluster */ 426 bool fragmented; 427 428 struct btrfs_block_group *block_group; 429 /* 430 * when a cluster is allocated from a block group, we put the 431 * cluster onto a list in the block group so that it can 432 * be freed before the block group is freed. 433 */ 434 struct list_head block_group_list; 435}; 436 437enum btrfs_caching_type { 438 BTRFS_CACHE_NO, 439 BTRFS_CACHE_STARTED, 440 BTRFS_CACHE_FAST, 441 BTRFS_CACHE_FINISHED, 442 BTRFS_CACHE_ERROR, 443}; 444 445/* 446 * Tree to record all locked full stripes of a RAID5/6 block group 447 */ 448struct btrfs_full_stripe_locks_tree { 449 struct rb_root root; 450 struct mutex lock; 451}; 452 453/* Discard control. */ 454/* 455 * Async discard uses multiple lists to differentiate the discard filter 456 * parameters. Index 0 is for completely free block groups where we need to 457 * ensure the entire block group is trimmed without being lossy. Indices 458 * afterwards represent monotonically decreasing discard filter sizes to 459 * prioritize what should be discarded next. 460 */ 461#define BTRFS_NR_DISCARD_LISTS 3 462#define BTRFS_DISCARD_INDEX_UNUSED 0 463#define BTRFS_DISCARD_INDEX_START 1 464 465struct btrfs_discard_ctl { 466 struct workqueue_struct *discard_workers; 467 struct delayed_work work; 468 spinlock_t lock; 469 struct btrfs_block_group *block_group; 470 struct list_head discard_list[BTRFS_NR_DISCARD_LISTS]; 471 u64 prev_discard; 472 atomic_t discardable_extents; 473 atomic64_t discardable_bytes; 474 u64 max_discard_size; 475 unsigned long delay; 476 u32 iops_limit; 477 u32 kbps_limit; 478 u64 discard_extent_bytes; 479 u64 discard_bitmap_bytes; 480 atomic64_t discard_bytes_saved; 481}; 482 483/* delayed seq elem */ 484struct seq_list { 485 struct list_head list; 486 u64 seq; 487}; 488 489#define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 490 491#define SEQ_LAST ((u64)-1) 492 493enum btrfs_orphan_cleanup_state { 494 ORPHAN_CLEANUP_STARTED = 1, 495 ORPHAN_CLEANUP_DONE = 2, 496}; 497 498void btrfs_init_async_reclaim_work(struct btrfs_fs_info *fs_info); 499 500/* fs_info */ 501struct reloc_control; 502struct btrfs_device; 503struct btrfs_fs_devices; 504struct btrfs_balance_control; 505struct btrfs_delayed_root; 506 507/* 508 * Block group or device which contains an active swapfile. Used for preventing 509 * unsafe operations while a swapfile is active. 510 * 511 * These are sorted on (ptr, inode) (note that a block group or device can 512 * contain more than one swapfile). We compare the pointer values because we 513 * don't actually care what the object is, we just need a quick check whether 514 * the object exists in the rbtree. 515 */ 516struct btrfs_swapfile_pin { 517 struct rb_node node; 518 void *ptr; 519 struct inode *inode; 520 /* 521 * If true, ptr points to a struct btrfs_block_group. Otherwise, ptr 522 * points to a struct btrfs_device. 523 */ 524 bool is_block_group; 525 /* 526 * Only used when 'is_block_group' is true and it is the number of 527 * extents used by a swapfile for this block group ('ptr' field). 528 */ 529 int bg_extent_count; 530}; 531 532enum { 533 BTRFS_FS_BARRIER, 534 BTRFS_FS_CLOSING_START, 535 BTRFS_FS_CLOSING_DONE, 536 BTRFS_FS_LOG_RECOVERING, 537 BTRFS_FS_OPEN, 538 BTRFS_FS_QUOTA_ENABLED, 539 BTRFS_FS_UPDATE_UUID_TREE_GEN, 540 BTRFS_FS_CREATING_FREE_SPACE_TREE, 541 BTRFS_FS_BTREE_ERR, 542 BTRFS_FS_LOG1_ERR, 543 BTRFS_FS_LOG2_ERR, 544 BTRFS_FS_QUOTA_OVERRIDE, 545 /* Used to record internally whether fs has been frozen */ 546 BTRFS_FS_FROZEN, 547 /* 548 * Indicate that balance has been set up from the ioctl and is in the 549 * main phase. The fs_info::balance_ctl is initialized. 550 * Set and cleared while holding fs_info::balance_mutex. 551 */ 552 BTRFS_FS_BALANCE_RUNNING, 553 554 /* Indicate that the cleaner thread is awake and doing something. */ 555 BTRFS_FS_CLEANER_RUNNING, 556 557 /* 558 * The checksumming has an optimized version and is considered fast, 559 * so we don't need to offload checksums to workqueues. 560 */ 561 BTRFS_FS_CSUM_IMPL_FAST, 562 563 /* Indicate that the discard workqueue can service discards. */ 564 BTRFS_FS_DISCARD_RUNNING, 565 566 /* Indicate that we can't trust the free space tree for caching yet */ 567 BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, 568}; 569 570/* 571 * Exclusive operations (device replace, resize, device add/remove, balance) 572 */ 573enum btrfs_exclusive_operation { 574 BTRFS_EXCLOP_NONE, 575 BTRFS_EXCLOP_BALANCE, 576 BTRFS_EXCLOP_DEV_ADD, 577 BTRFS_EXCLOP_DEV_REMOVE, 578 BTRFS_EXCLOP_DEV_REPLACE, 579 BTRFS_EXCLOP_RESIZE, 580 BTRFS_EXCLOP_SWAP_ACTIVATE, 581}; 582 583struct btrfs_fs_info { 584 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 585 unsigned long flags; 586 struct btrfs_root *extent_root; 587 struct btrfs_root *tree_root; 588 struct btrfs_root *chunk_root; 589 struct btrfs_root *dev_root; 590 struct btrfs_root *fs_root; 591 struct btrfs_root *csum_root; 592 struct btrfs_root *quota_root; 593 struct btrfs_root *uuid_root; 594 struct btrfs_root *free_space_root; 595 struct btrfs_root *data_reloc_root; 596 597 /* the log root tree is a directory of all the other log roots */ 598 struct btrfs_root *log_root_tree; 599 600 spinlock_t fs_roots_radix_lock; 601 struct radix_tree_root fs_roots_radix; 602 603 /* block group cache stuff */ 604 spinlock_t block_group_cache_lock; 605 u64 first_logical_byte; 606 struct rb_root block_group_cache_tree; 607 608 /* keep track of unallocated space */ 609 atomic64_t free_chunk_space; 610 611 /* Track ranges which are used by log trees blocks/logged data extents */ 612 struct extent_io_tree excluded_extents; 613 614 /* logical->physical extent mapping */ 615 struct extent_map_tree mapping_tree; 616 617 /* 618 * block reservation for extent, checksum, root tree and 619 * delayed dir index item 620 */ 621 struct btrfs_block_rsv global_block_rsv; 622 /* block reservation for metadata operations */ 623 struct btrfs_block_rsv trans_block_rsv; 624 /* block reservation for chunk tree */ 625 struct btrfs_block_rsv chunk_block_rsv; 626 /* block reservation for delayed operations */ 627 struct btrfs_block_rsv delayed_block_rsv; 628 /* block reservation for delayed refs */ 629 struct btrfs_block_rsv delayed_refs_rsv; 630 631 struct btrfs_block_rsv empty_block_rsv; 632 633 u64 generation; 634 u64 last_trans_committed; 635 u64 avg_delayed_ref_runtime; 636 637 /* 638 * this is updated to the current trans every time a full commit 639 * is required instead of the faster short fsync log commits 640 */ 641 u64 last_trans_log_full_commit; 642 unsigned long mount_opt; 643 /* 644 * Track requests for actions that need to be done during transaction 645 * commit (like for some mount options). 646 */ 647 unsigned long pending_changes; 648 unsigned long compress_type:4; 649 unsigned int compress_level; 650 u32 commit_interval; 651 /* 652 * It is a suggestive number, the read side is safe even it gets a 653 * wrong number because we will write out the data into a regular 654 * extent. The write side(mount/remount) is under ->s_umount lock, 655 * so it is also safe. 656 */ 657 u64 max_inline; 658 659 struct btrfs_transaction *running_transaction; 660 wait_queue_head_t transaction_throttle; 661 wait_queue_head_t transaction_wait; 662 wait_queue_head_t transaction_blocked_wait; 663 wait_queue_head_t async_submit_wait; 664 665 /* 666 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 667 * when they are updated. 668 * 669 * Because we do not clear the flags for ever, so we needn't use 670 * the lock on the read side. 671 * 672 * We also needn't use the lock when we mount the fs, because 673 * there is no other task which will update the flag. 674 */ 675 spinlock_t super_lock; 676 struct btrfs_super_block *super_copy; 677 struct btrfs_super_block *super_for_commit; 678 struct super_block *sb; 679 struct inode *btree_inode; 680 struct mutex tree_log_mutex; 681 struct mutex transaction_kthread_mutex; 682 struct mutex cleaner_mutex; 683 struct mutex chunk_mutex; 684 685 /* 686 * this is taken to make sure we don't set block groups ro after 687 * the free space cache has been allocated on them 688 */ 689 struct mutex ro_block_group_mutex; 690 691 /* this is used during read/modify/write to make sure 692 * no two ios are trying to mod the same stripe at the same 693 * time 694 */ 695 struct btrfs_stripe_hash_table *stripe_hash_table; 696 697 /* 698 * this protects the ordered operations list only while we are 699 * processing all of the entries on it. This way we make 700 * sure the commit code doesn't find the list temporarily empty 701 * because another function happens to be doing non-waiting preflush 702 * before jumping into the main commit. 703 */ 704 struct mutex ordered_operations_mutex; 705 706 struct rw_semaphore commit_root_sem; 707 708 struct rw_semaphore cleanup_work_sem; 709 710 struct rw_semaphore subvol_sem; 711 712 spinlock_t trans_lock; 713 /* 714 * the reloc mutex goes with the trans lock, it is taken 715 * during commit to protect us from the relocation code 716 */ 717 struct mutex reloc_mutex; 718 719 struct list_head trans_list; 720 struct list_head dead_roots; 721 struct list_head caching_block_groups; 722 723 spinlock_t delayed_iput_lock; 724 struct list_head delayed_iputs; 725 atomic_t nr_delayed_iputs; 726 wait_queue_head_t delayed_iputs_wait; 727 728 atomic64_t tree_mod_seq; 729 730 /* this protects tree_mod_log and tree_mod_seq_list */ 731 rwlock_t tree_mod_log_lock; 732 struct rb_root tree_mod_log; 733 struct list_head tree_mod_seq_list; 734 735 atomic_t async_delalloc_pages; 736 737 /* 738 * this is used to protect the following list -- ordered_roots. 739 */ 740 spinlock_t ordered_root_lock; 741 742 /* 743 * all fs/file tree roots in which there are data=ordered extents 744 * pending writeback are added into this list. 745 * 746 * these can span multiple transactions and basically include 747 * every dirty data page that isn't from nodatacow 748 */ 749 struct list_head ordered_roots; 750 751 struct mutex delalloc_root_mutex; 752 spinlock_t delalloc_root_lock; 753 /* all fs/file tree roots that have delalloc inodes. */ 754 struct list_head delalloc_roots; 755 756 /* 757 * there is a pool of worker threads for checksumming during writes 758 * and a pool for checksumming after reads. This is because readers 759 * can run with FS locks held, and the writers may be waiting for 760 * those locks. We don't want ordering in the pending list to cause 761 * deadlocks, and so the two are serviced separately. 762 * 763 * A third pool does submit_bio to avoid deadlocking with the other 764 * two 765 */ 766 struct btrfs_workqueue *workers; 767 struct btrfs_workqueue *delalloc_workers; 768 struct btrfs_workqueue *flush_workers; 769 struct btrfs_workqueue *endio_workers; 770 struct btrfs_workqueue *endio_meta_workers; 771 struct btrfs_workqueue *endio_raid56_workers; 772 struct btrfs_workqueue *rmw_workers; 773 struct btrfs_workqueue *endio_meta_write_workers; 774 struct btrfs_workqueue *endio_write_workers; 775 struct btrfs_workqueue *endio_freespace_worker; 776 struct btrfs_workqueue *caching_workers; 777 struct btrfs_workqueue *readahead_workers; 778 779 /* 780 * fixup workers take dirty pages that didn't properly go through 781 * the cow mechanism and make them safe to write. It happens 782 * for the sys_munmap function call path 783 */ 784 struct btrfs_workqueue *fixup_workers; 785 struct btrfs_workqueue *delayed_workers; 786 787 struct task_struct *transaction_kthread; 788 struct task_struct *cleaner_kthread; 789 u32 thread_pool_size; 790 791 struct kobject *space_info_kobj; 792 struct kobject *qgroups_kobj; 793 794 u64 total_pinned; 795 796 /* used to keep from writing metadata until there is a nice batch */ 797 struct percpu_counter dirty_metadata_bytes; 798 struct percpu_counter delalloc_bytes; 799 struct percpu_counter dio_bytes; 800 s32 dirty_metadata_batch; 801 s32 delalloc_batch; 802 803 struct list_head dirty_cowonly_roots; 804 805 struct btrfs_fs_devices *fs_devices; 806 807 /* 808 * The space_info list is effectively read only after initial 809 * setup. It is populated at mount time and cleaned up after 810 * all block groups are removed. RCU is used to protect it. 811 */ 812 struct list_head space_info; 813 814 struct btrfs_space_info *data_sinfo; 815 816 struct reloc_control *reloc_ctl; 817 818 /* data_alloc_cluster is only used in ssd_spread mode */ 819 struct btrfs_free_cluster data_alloc_cluster; 820 821 /* all metadata allocations go through this cluster */ 822 struct btrfs_free_cluster meta_alloc_cluster; 823 824 /* auto defrag inodes go here */ 825 spinlock_t defrag_inodes_lock; 826 struct rb_root defrag_inodes; 827 atomic_t defrag_running; 828 829 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 830 seqlock_t profiles_lock; 831 /* 832 * these three are in extended format (availability of single 833 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 834 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 835 */ 836 u64 avail_data_alloc_bits; 837 u64 avail_metadata_alloc_bits; 838 u64 avail_system_alloc_bits; 839 840 /* restriper state */ 841 spinlock_t balance_lock; 842 struct mutex balance_mutex; 843 atomic_t balance_pause_req; 844 atomic_t balance_cancel_req; 845 struct btrfs_balance_control *balance_ctl; 846 wait_queue_head_t balance_wait_q; 847 848 u32 data_chunk_allocations; 849 u32 metadata_ratio; 850 851 void *bdev_holder; 852 853 /* private scrub information */ 854 struct mutex scrub_lock; 855 atomic_t scrubs_running; 856 atomic_t scrub_pause_req; 857 atomic_t scrubs_paused; 858 atomic_t scrub_cancel_req; 859 wait_queue_head_t scrub_pause_wait; 860 /* 861 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not 862 * running. 863 */ 864 refcount_t scrub_workers_refcnt; 865 struct btrfs_workqueue *scrub_workers; 866 struct btrfs_workqueue *scrub_wr_completion_workers; 867 struct btrfs_workqueue *scrub_parity_workers; 868 869 struct btrfs_discard_ctl discard_ctl; 870 871#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 872 u32 check_integrity_print_mask; 873#endif 874 /* is qgroup tracking in a consistent state? */ 875 u64 qgroup_flags; 876 877 /* holds configuration and tracking. Protected by qgroup_lock */ 878 struct rb_root qgroup_tree; 879 spinlock_t qgroup_lock; 880 881 /* 882 * used to avoid frequently calling ulist_alloc()/ulist_free() 883 * when doing qgroup accounting, it must be protected by qgroup_lock. 884 */ 885 struct ulist *qgroup_ulist; 886 887 /* 888 * Protect user change for quota operations. If a transaction is needed, 889 * it must be started before locking this lock. 890 */ 891 struct mutex qgroup_ioctl_lock; 892 893 /* list of dirty qgroups to be written at next commit */ 894 struct list_head dirty_qgroups; 895 896 /* used by qgroup for an efficient tree traversal */ 897 u64 qgroup_seq; 898 899 /* qgroup rescan items */ 900 struct mutex qgroup_rescan_lock; /* protects the progress item */ 901 struct btrfs_key qgroup_rescan_progress; 902 struct btrfs_workqueue *qgroup_rescan_workers; 903 struct completion qgroup_rescan_completion; 904 struct btrfs_work qgroup_rescan_work; 905 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 906 907 /* filesystem state */ 908 unsigned long fs_state; 909 910 struct btrfs_delayed_root *delayed_root; 911 912 /* readahead tree */ 913 spinlock_t reada_lock; 914 struct radix_tree_root reada_tree; 915 916 /* readahead works cnt */ 917 atomic_t reada_works_cnt; 918 919 /* Extent buffer radix tree */ 920 spinlock_t buffer_lock; 921 struct radix_tree_root buffer_radix; 922 923 /* next backup root to be overwritten */ 924 int backup_root_index; 925 926 /* device replace state */ 927 struct btrfs_dev_replace dev_replace; 928 929 struct semaphore uuid_tree_rescan_sem; 930 931 /* Used to reclaim the metadata space in the background. */ 932 struct work_struct async_reclaim_work; 933 struct work_struct async_data_reclaim_work; 934 935 spinlock_t unused_bgs_lock; 936 struct list_head unused_bgs; 937 struct mutex unused_bg_unpin_mutex; 938 struct mutex delete_unused_bgs_mutex; 939 940 /* Cached block sizes */ 941 u32 nodesize; 942 u32 sectorsize; 943 u32 stripesize; 944 945 /* Block groups and devices containing active swapfiles. */ 946 spinlock_t swapfile_pins_lock; 947 struct rb_root swapfile_pins; 948 949 struct crypto_shash *csum_shash; 950 951 /* 952 * Number of send operations in progress. 953 * Updated while holding fs_info::balance_mutex. 954 */ 955 int send_in_progress; 956 957 /* Type of exclusive operation running */ 958 unsigned long exclusive_operation; 959 960#ifdef CONFIG_BTRFS_FS_REF_VERIFY 961 spinlock_t ref_verify_lock; 962 struct rb_root block_tree; 963#endif 964 965#ifdef CONFIG_BTRFS_DEBUG 966 struct kobject *debug_kobj; 967 struct kobject *discard_debug_kobj; 968 struct list_head allocated_roots; 969 970 spinlock_t eb_leak_lock; 971 struct list_head allocated_ebs; 972#endif 973}; 974 975static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 976{ 977 return sb->s_fs_info; 978} 979 980/* 981 * The state of btrfs root 982 */ 983enum { 984 /* 985 * btrfs_record_root_in_trans is a multi-step process, and it can race 986 * with the balancing code. But the race is very small, and only the 987 * first time the root is added to each transaction. So IN_TRANS_SETUP 988 * is used to tell us when more checks are required 989 */ 990 BTRFS_ROOT_IN_TRANS_SETUP, 991 992 /* 993 * Set if tree blocks of this root can be shared by other roots. 994 * Only subvolume trees and their reloc trees have this bit set. 995 * Conflicts with TRACK_DIRTY bit. 996 * 997 * This affects two things: 998 * 999 * - How balance works 1000 * For shareable roots, we need to use reloc tree and do path 1001 * replacement for balance, and need various pre/post hooks for 1002 * snapshot creation to handle them. 1003 * 1004 * While for non-shareable trees, we just simply do a tree search 1005 * with COW. 1006 * 1007 * - How dirty roots are tracked 1008 * For shareable roots, btrfs_record_root_in_trans() is needed to 1009 * track them, while non-subvolume roots have TRACK_DIRTY bit, they 1010 * don't need to set this manually. 1011 */ 1012 BTRFS_ROOT_SHAREABLE, 1013 BTRFS_ROOT_TRACK_DIRTY, 1014 BTRFS_ROOT_IN_RADIX, 1015 BTRFS_ROOT_ORPHAN_ITEM_INSERTED, 1016 BTRFS_ROOT_DEFRAG_RUNNING, 1017 BTRFS_ROOT_FORCE_COW, 1018 BTRFS_ROOT_MULTI_LOG_TASKS, 1019 BTRFS_ROOT_DIRTY, 1020 BTRFS_ROOT_DELETING, 1021 1022 /* 1023 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan 1024 * 1025 * Set for the subvolume tree owning the reloc tree. 1026 */ 1027 BTRFS_ROOT_DEAD_RELOC_TREE, 1028 /* Mark dead root stored on device whose cleanup needs to be resumed */ 1029 BTRFS_ROOT_DEAD_TREE, 1030 /* The root has a log tree. Used only for subvolume roots. */ 1031 BTRFS_ROOT_HAS_LOG_TREE, 1032 /* Qgroup flushing is in progress */ 1033 BTRFS_ROOT_QGROUP_FLUSHING, 1034}; 1035 1036/* 1037 * Record swapped tree blocks of a subvolume tree for delayed subtree trace 1038 * code. For detail check comment in fs/btrfs/qgroup.c. 1039 */ 1040struct btrfs_qgroup_swapped_blocks { 1041 spinlock_t lock; 1042 /* RM_EMPTY_ROOT() of above blocks[] */ 1043 bool swapped; 1044 struct rb_root blocks[BTRFS_MAX_LEVEL]; 1045}; 1046 1047/* 1048 * in ram representation of the tree. extent_root is used for all allocations 1049 * and for the extent tree extent_root root. 1050 */ 1051struct btrfs_root { 1052 struct extent_buffer *node; 1053 1054 struct extent_buffer *commit_root; 1055 struct btrfs_root *log_root; 1056 struct btrfs_root *reloc_root; 1057 1058 unsigned long state; 1059 struct btrfs_root_item root_item; 1060 struct btrfs_key root_key; 1061 struct btrfs_fs_info *fs_info; 1062 struct extent_io_tree dirty_log_pages; 1063 1064 struct mutex objectid_mutex; 1065 1066 spinlock_t accounting_lock; 1067 struct btrfs_block_rsv *block_rsv; 1068 1069 /* free ino cache stuff */ 1070 struct btrfs_free_space_ctl *free_ino_ctl; 1071 enum btrfs_caching_type ino_cache_state; 1072 spinlock_t ino_cache_lock; 1073 wait_queue_head_t ino_cache_wait; 1074 struct btrfs_free_space_ctl *free_ino_pinned; 1075 u64 ino_cache_progress; 1076 struct inode *ino_cache_inode; 1077 1078 struct mutex log_mutex; 1079 wait_queue_head_t log_writer_wait; 1080 wait_queue_head_t log_commit_wait[2]; 1081 struct list_head log_ctxs[2]; 1082 /* Used only for log trees of subvolumes, not for the log root tree */ 1083 atomic_t log_writers; 1084 atomic_t log_commit[2]; 1085 /* Used only for log trees of subvolumes, not for the log root tree */ 1086 atomic_t log_batch; 1087 int log_transid; 1088 /* No matter the commit succeeds or not*/ 1089 int log_transid_committed; 1090 /* Just be updated when the commit succeeds. */ 1091 int last_log_commit; 1092 pid_t log_start_pid; 1093 1094 u64 last_trans; 1095 1096 u32 type; 1097 1098 u64 highest_objectid; 1099 1100 struct btrfs_key defrag_progress; 1101 struct btrfs_key defrag_max; 1102 1103 /* The dirty list is only used by non-shareable roots */ 1104 struct list_head dirty_list; 1105 1106 struct list_head root_list; 1107 1108 spinlock_t log_extents_lock[2]; 1109 struct list_head logged_list[2]; 1110 1111 int orphan_cleanup_state; 1112 1113 spinlock_t inode_lock; 1114 /* red-black tree that keeps track of in-memory inodes */ 1115 struct rb_root inode_tree; 1116 1117 /* 1118 * radix tree that keeps track of delayed nodes of every inode, 1119 * protected by inode_lock 1120 */ 1121 struct radix_tree_root delayed_nodes_tree; 1122 /* 1123 * right now this just gets used so that a root has its own devid 1124 * for stat. It may be used for more later 1125 */ 1126 dev_t anon_dev; 1127 1128 spinlock_t root_item_lock; 1129 refcount_t refs; 1130 1131 struct mutex delalloc_mutex; 1132 spinlock_t delalloc_lock; 1133 /* 1134 * all of the inodes that have delalloc bytes. It is possible for 1135 * this list to be empty even when there is still dirty data=ordered 1136 * extents waiting to finish IO. 1137 */ 1138 struct list_head delalloc_inodes; 1139 struct list_head delalloc_root; 1140 u64 nr_delalloc_inodes; 1141 1142 struct mutex ordered_extent_mutex; 1143 /* 1144 * this is used by the balancing code to wait for all the pending 1145 * ordered extents 1146 */ 1147 spinlock_t ordered_extent_lock; 1148 1149 /* 1150 * all of the data=ordered extents pending writeback 1151 * these can span multiple transactions and basically include 1152 * every dirty data page that isn't from nodatacow 1153 */ 1154 struct list_head ordered_extents; 1155 struct list_head ordered_root; 1156 u64 nr_ordered_extents; 1157 1158 /* 1159 * Not empty if this subvolume root has gone through tree block swap 1160 * (relocation) 1161 * 1162 * Will be used by reloc_control::dirty_subvol_roots. 1163 */ 1164 struct list_head reloc_dirty_list; 1165 1166 /* 1167 * Number of currently running SEND ioctls to prevent 1168 * manipulation with the read-only status via SUBVOL_SETFLAGS 1169 */ 1170 int send_in_progress; 1171 /* 1172 * Number of currently running deduplication operations that have a 1173 * destination inode belonging to this root. Protected by the lock 1174 * root_item_lock. 1175 */ 1176 int dedupe_in_progress; 1177 /* For exclusion of snapshot creation and nocow writes */ 1178 struct btrfs_drew_lock snapshot_lock; 1179 1180 atomic_t snapshot_force_cow; 1181 1182 /* For qgroup metadata reserved space */ 1183 spinlock_t qgroup_meta_rsv_lock; 1184 u64 qgroup_meta_rsv_pertrans; 1185 u64 qgroup_meta_rsv_prealloc; 1186 wait_queue_head_t qgroup_flush_wait; 1187 1188 /* Number of active swapfiles */ 1189 atomic_t nr_swapfiles; 1190 1191 /* Record pairs of swapped blocks for qgroup */ 1192 struct btrfs_qgroup_swapped_blocks swapped_blocks; 1193 1194 /* Used only by log trees, when logging csum items */ 1195 struct extent_io_tree log_csum_range; 1196 1197#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1198 u64 alloc_bytenr; 1199#endif 1200 1201#ifdef CONFIG_BTRFS_DEBUG 1202 struct list_head leak_list; 1203#endif 1204}; 1205 1206/* 1207 * Structure that conveys information about an extent that is going to replace 1208 * all the extents in a file range. 1209 */ 1210struct btrfs_replace_extent_info { 1211 u64 disk_offset; 1212 u64 disk_len; 1213 u64 data_offset; 1214 u64 data_len; 1215 u64 file_offset; 1216 /* Pointer to a file extent item of type regular or prealloc. */ 1217 char *extent_buf; 1218 /* 1219 * Set to true when attempting to replace a file range with a new extent 1220 * described by this structure, set to false when attempting to clone an 1221 * existing extent into a file range. 1222 */ 1223 bool is_new_extent; 1224 /* Meaningful only if is_new_extent is true. */ 1225 int qgroup_reserved; 1226 /* 1227 * Meaningful only if is_new_extent is true. 1228 * Used to track how many extent items we have already inserted in a 1229 * subvolume tree that refer to the extent described by this structure, 1230 * so that we know when to create a new delayed ref or update an existing 1231 * one. 1232 */ 1233 int insertions; 1234}; 1235 1236struct btrfs_file_private { 1237 void *filldir_buf; 1238}; 1239 1240 1241static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1242{ 1243 1244 return info->nodesize - sizeof(struct btrfs_header); 1245} 1246 1247#define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1248 1249static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1250{ 1251 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1252} 1253 1254static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1255{ 1256 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1257} 1258 1259#define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1260 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1261static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1262{ 1263 return BTRFS_MAX_ITEM_SIZE(info) - 1264 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1265} 1266 1267static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1268{ 1269 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1270} 1271 1272/* 1273 * Flags for mount options. 1274 * 1275 * Note: don't forget to add new options to btrfs_show_options() 1276 */ 1277#define BTRFS_MOUNT_NODATASUM (1 << 0) 1278#define BTRFS_MOUNT_NODATACOW (1 << 1) 1279#define BTRFS_MOUNT_NOBARRIER (1 << 2) 1280#define BTRFS_MOUNT_SSD (1 << 3) 1281#define BTRFS_MOUNT_DEGRADED (1 << 4) 1282#define BTRFS_MOUNT_COMPRESS (1 << 5) 1283#define BTRFS_MOUNT_NOTREELOG (1 << 6) 1284#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1285#define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1286#define BTRFS_MOUNT_NOSSD (1 << 9) 1287#define BTRFS_MOUNT_DISCARD_SYNC (1 << 10) 1288#define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1289#define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1290#define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1291#define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1292#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1293#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1294#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1295#define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1296#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1297#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1298#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1299#define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1300#define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1301#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1302#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1303#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1304#define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1305#define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1306#define BTRFS_MOUNT_DISCARD_ASYNC (1 << 29) 1307 1308#define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1309#define BTRFS_DEFAULT_MAX_INLINE (2048) 1310 1311#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1312#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1313#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1314#define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1315 BTRFS_MOUNT_##opt) 1316 1317#define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1318do { \ 1319 if (!btrfs_test_opt(fs_info, opt)) \ 1320 btrfs_info(fs_info, fmt, ##args); \ 1321 btrfs_set_opt(fs_info->mount_opt, opt); \ 1322} while (0) 1323 1324#define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1325do { \ 1326 if (btrfs_test_opt(fs_info, opt)) \ 1327 btrfs_info(fs_info, fmt, ##args); \ 1328 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1329} while (0) 1330 1331/* 1332 * Requests for changes that need to be done during transaction commit. 1333 * 1334 * Internal mount options that are used for special handling of the real 1335 * mount options (eg. cannot be set during remount and have to be set during 1336 * transaction commit) 1337 */ 1338 1339#define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1340#define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1341#define BTRFS_PENDING_COMMIT (2) 1342 1343#define btrfs_test_pending(info, opt) \ 1344 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1345#define btrfs_set_pending(info, opt) \ 1346 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1347#define btrfs_clear_pending(info, opt) \ 1348 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1349 1350/* 1351 * Helpers for setting pending mount option changes. 1352 * 1353 * Expects corresponding macros 1354 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1355 */ 1356#define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1357do { \ 1358 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1359 btrfs_info((info), fmt, ##args); \ 1360 btrfs_set_pending((info), SET_##opt); \ 1361 btrfs_clear_pending((info), CLEAR_##opt); \ 1362 } \ 1363} while(0) 1364 1365#define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1366do { \ 1367 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1368 btrfs_info((info), fmt, ##args); \ 1369 btrfs_set_pending((info), CLEAR_##opt); \ 1370 btrfs_clear_pending((info), SET_##opt); \ 1371 } \ 1372} while(0) 1373 1374/* 1375 * Inode flags 1376 */ 1377#define BTRFS_INODE_NODATASUM (1 << 0) 1378#define BTRFS_INODE_NODATACOW (1 << 1) 1379#define BTRFS_INODE_READONLY (1 << 2) 1380#define BTRFS_INODE_NOCOMPRESS (1 << 3) 1381#define BTRFS_INODE_PREALLOC (1 << 4) 1382#define BTRFS_INODE_SYNC (1 << 5) 1383#define BTRFS_INODE_IMMUTABLE (1 << 6) 1384#define BTRFS_INODE_APPEND (1 << 7) 1385#define BTRFS_INODE_NODUMP (1 << 8) 1386#define BTRFS_INODE_NOATIME (1 << 9) 1387#define BTRFS_INODE_DIRSYNC (1 << 10) 1388#define BTRFS_INODE_COMPRESS (1 << 11) 1389 1390#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1391 1392#define BTRFS_INODE_FLAG_MASK \ 1393 (BTRFS_INODE_NODATASUM | \ 1394 BTRFS_INODE_NODATACOW | \ 1395 BTRFS_INODE_READONLY | \ 1396 BTRFS_INODE_NOCOMPRESS | \ 1397 BTRFS_INODE_PREALLOC | \ 1398 BTRFS_INODE_SYNC | \ 1399 BTRFS_INODE_IMMUTABLE | \ 1400 BTRFS_INODE_APPEND | \ 1401 BTRFS_INODE_NODUMP | \ 1402 BTRFS_INODE_NOATIME | \ 1403 BTRFS_INODE_DIRSYNC | \ 1404 BTRFS_INODE_COMPRESS | \ 1405 BTRFS_INODE_ROOT_ITEM_INIT) 1406 1407struct btrfs_map_token { 1408 struct extent_buffer *eb; 1409 char *kaddr; 1410 unsigned long offset; 1411}; 1412 1413#define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1414 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1415 1416static inline void btrfs_init_map_token(struct btrfs_map_token *token, 1417 struct extent_buffer *eb) 1418{ 1419 token->eb = eb; 1420 token->kaddr = page_address(eb->pages[0]); 1421 token->offset = 0; 1422} 1423 1424/* some macros to generate set/get functions for the struct fields. This 1425 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1426 * one for u8: 1427 */ 1428#define le8_to_cpu(v) (v) 1429#define cpu_to_le8(v) (v) 1430#define __le8 u8 1431 1432static inline u8 get_unaligned_le8(const void *p) 1433{ 1434 return *(u8 *)p; 1435} 1436 1437static inline void put_unaligned_le8(u8 val, void *p) 1438{ 1439 *(u8 *)p = val; 1440} 1441 1442#define read_eb_member(eb, ptr, type, member, result) (\ 1443 read_extent_buffer(eb, (char *)(result), \ 1444 ((unsigned long)(ptr)) + \ 1445 offsetof(type, member), \ 1446 sizeof(((type *)0)->member))) 1447 1448#define write_eb_member(eb, ptr, type, member, result) (\ 1449 write_extent_buffer(eb, (char *)(result), \ 1450 ((unsigned long)(ptr)) + \ 1451 offsetof(type, member), \ 1452 sizeof(((type *)0)->member))) 1453 1454#define DECLARE_BTRFS_SETGET_BITS(bits) \ 1455u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \ 1456 const void *ptr, unsigned long off); \ 1457void btrfs_set_token_##bits(struct btrfs_map_token *token, \ 1458 const void *ptr, unsigned long off, \ 1459 u##bits val); \ 1460u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1461 const void *ptr, unsigned long off); \ 1462void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \ 1463 unsigned long off, u##bits val); 1464 1465DECLARE_BTRFS_SETGET_BITS(8) 1466DECLARE_BTRFS_SETGET_BITS(16) 1467DECLARE_BTRFS_SETGET_BITS(32) 1468DECLARE_BTRFS_SETGET_BITS(64) 1469 1470#define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1471static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1472 const type *s) \ 1473{ \ 1474 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1475 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1476} \ 1477static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \ 1478 u##bits val) \ 1479{ \ 1480 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1481 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1482} \ 1483static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \ 1484 const type *s) \ 1485{ \ 1486 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1487 return btrfs_get_token_##bits(token, s, offsetof(type, member));\ 1488} \ 1489static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\ 1490 type *s, u##bits val) \ 1491{ \ 1492 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1493 btrfs_set_token_##bits(token, s, offsetof(type, member), val); \ 1494} 1495 1496#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1497static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1498{ \ 1499 const type *p = page_address(eb->pages[0]); \ 1500 return get_unaligned_le##bits(&p->member); \ 1501} \ 1502static inline void btrfs_set_##name(const struct extent_buffer *eb, \ 1503 u##bits val) \ 1504{ \ 1505 type *p = page_address(eb->pages[0]); \ 1506 put_unaligned_le##bits(val, &p->member); \ 1507} 1508 1509#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1510static inline u##bits btrfs_##name(const type *s) \ 1511{ \ 1512 return get_unaligned_le##bits(&s->member); \ 1513} \ 1514static inline void btrfs_set_##name(type *s, u##bits val) \ 1515{ \ 1516 put_unaligned_le##bits(val, &s->member); \ 1517} 1518 1519static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb, 1520 struct btrfs_dev_item *s) 1521{ 1522 BUILD_BUG_ON(sizeof(u64) != 1523 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1524 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1525 total_bytes)); 1526} 1527static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb, 1528 struct btrfs_dev_item *s, 1529 u64 val) 1530{ 1531 BUILD_BUG_ON(sizeof(u64) != 1532 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1533 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1534 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1535} 1536 1537 1538BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1539BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1540BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1541BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1542BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1543 start_offset, 64); 1544BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1545BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1546BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1547BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1548BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1549BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1550 1551BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1552BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1553 total_bytes, 64); 1554BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1555 bytes_used, 64); 1556BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1557 io_align, 32); 1558BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1559 io_width, 32); 1560BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1561 sector_size, 32); 1562BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1563BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1564 dev_group, 32); 1565BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1566 seek_speed, 8); 1567BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1568 bandwidth, 8); 1569BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1570 generation, 64); 1571 1572static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1573{ 1574 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1575} 1576 1577static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1578{ 1579 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1580} 1581 1582BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1583BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1584BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1585BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1586BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1587BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1588BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1589BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1590BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1591BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1592BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1593 1594static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1595{ 1596 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1597} 1598 1599BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1600BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1601BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1602 stripe_len, 64); 1603BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1604 io_align, 32); 1605BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1606 io_width, 32); 1607BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1608 sector_size, 32); 1609BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1610BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1611 num_stripes, 16); 1612BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1613 sub_stripes, 16); 1614BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1615BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1616 1617static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1618 int nr) 1619{ 1620 unsigned long offset = (unsigned long)c; 1621 offset += offsetof(struct btrfs_chunk, stripe); 1622 offset += nr * sizeof(struct btrfs_stripe); 1623 return (struct btrfs_stripe *)offset; 1624} 1625 1626static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1627{ 1628 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1629} 1630 1631static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb, 1632 struct btrfs_chunk *c, int nr) 1633{ 1634 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1635} 1636 1637static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb, 1638 struct btrfs_chunk *c, int nr) 1639{ 1640 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1641} 1642 1643/* struct btrfs_block_group_item */ 1644BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item, 1645 used, 64); 1646BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, 1647 used, 64); 1648BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid, 1649 struct btrfs_block_group_item, chunk_objectid, 64); 1650 1651BTRFS_SETGET_FUNCS(block_group_chunk_objectid, 1652 struct btrfs_block_group_item, chunk_objectid, 64); 1653BTRFS_SETGET_FUNCS(block_group_flags, 1654 struct btrfs_block_group_item, flags, 64); 1655BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags, 1656 struct btrfs_block_group_item, flags, 64); 1657 1658/* struct btrfs_free_space_info */ 1659BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1660 extent_count, 32); 1661BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1662 1663/* struct btrfs_inode_ref */ 1664BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1665BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1666 1667/* struct btrfs_inode_extref */ 1668BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1669 parent_objectid, 64); 1670BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1671 name_len, 16); 1672BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1673 1674/* struct btrfs_inode_item */ 1675BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1676BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1677BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1678BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1679BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1680BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1681BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1682BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1683BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1684BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1685BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1686BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1687BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1688 generation, 64); 1689BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1690 sequence, 64); 1691BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1692 transid, 64); 1693BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1694BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1695 nbytes, 64); 1696BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1697 block_group, 64); 1698BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1699BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1700BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1701BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1702BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1703BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1704BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1705BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1706BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1707BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1708 1709/* struct btrfs_dev_extent */ 1710BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1711 chunk_tree, 64); 1712BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1713 chunk_objectid, 64); 1714BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1715 chunk_offset, 64); 1716BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1717BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1718BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1719 generation, 64); 1720BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1721 1722BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1723 1724static inline void btrfs_tree_block_key(const struct extent_buffer *eb, 1725 struct btrfs_tree_block_info *item, 1726 struct btrfs_disk_key *key) 1727{ 1728 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1729} 1730 1731static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb, 1732 struct btrfs_tree_block_info *item, 1733 struct btrfs_disk_key *key) 1734{ 1735 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1736} 1737 1738BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1739 root, 64); 1740BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1741 objectid, 64); 1742BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1743 offset, 64); 1744BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1745 count, 32); 1746 1747BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1748 count, 32); 1749 1750BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1751 type, 8); 1752BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1753 offset, 64); 1754 1755static inline u32 btrfs_extent_inline_ref_size(int type) 1756{ 1757 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1758 type == BTRFS_SHARED_BLOCK_REF_KEY) 1759 return sizeof(struct btrfs_extent_inline_ref); 1760 if (type == BTRFS_SHARED_DATA_REF_KEY) 1761 return sizeof(struct btrfs_shared_data_ref) + 1762 sizeof(struct btrfs_extent_inline_ref); 1763 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1764 return sizeof(struct btrfs_extent_data_ref) + 1765 offsetof(struct btrfs_extent_inline_ref, offset); 1766 return 0; 1767} 1768 1769/* struct btrfs_node */ 1770BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1771BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1772BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1773 blockptr, 64); 1774BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1775 generation, 64); 1776 1777static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr) 1778{ 1779 unsigned long ptr; 1780 ptr = offsetof(struct btrfs_node, ptrs) + 1781 sizeof(struct btrfs_key_ptr) * nr; 1782 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1783} 1784 1785static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb, 1786 int nr, u64 val) 1787{ 1788 unsigned long ptr; 1789 ptr = offsetof(struct btrfs_node, ptrs) + 1790 sizeof(struct btrfs_key_ptr) * nr; 1791 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1792} 1793 1794static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr) 1795{ 1796 unsigned long ptr; 1797 ptr = offsetof(struct btrfs_node, ptrs) + 1798 sizeof(struct btrfs_key_ptr) * nr; 1799 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1800} 1801 1802static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb, 1803 int nr, u64 val) 1804{ 1805 unsigned long ptr; 1806 ptr = offsetof(struct btrfs_node, ptrs) + 1807 sizeof(struct btrfs_key_ptr) * nr; 1808 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1809} 1810 1811static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1812{ 1813 return offsetof(struct btrfs_node, ptrs) + 1814 sizeof(struct btrfs_key_ptr) * nr; 1815} 1816 1817void btrfs_node_key(const struct extent_buffer *eb, 1818 struct btrfs_disk_key *disk_key, int nr); 1819 1820static inline void btrfs_set_node_key(const struct extent_buffer *eb, 1821 struct btrfs_disk_key *disk_key, int nr) 1822{ 1823 unsigned long ptr; 1824 ptr = btrfs_node_key_ptr_offset(nr); 1825 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1826 struct btrfs_key_ptr, key, disk_key); 1827} 1828 1829/* struct btrfs_item */ 1830BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1831BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1832BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1833BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1834 1835static inline unsigned long btrfs_item_nr_offset(int nr) 1836{ 1837 return offsetof(struct btrfs_leaf, items) + 1838 sizeof(struct btrfs_item) * nr; 1839} 1840 1841static inline struct btrfs_item *btrfs_item_nr(int nr) 1842{ 1843 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1844} 1845 1846static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1847 struct btrfs_item *item) 1848{ 1849 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1850} 1851 1852static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1853{ 1854 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1855} 1856 1857static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1858{ 1859 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1860} 1861 1862static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1863{ 1864 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1865} 1866 1867static inline void btrfs_item_key(const struct extent_buffer *eb, 1868 struct btrfs_disk_key *disk_key, int nr) 1869{ 1870 struct btrfs_item *item = btrfs_item_nr(nr); 1871 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1872} 1873 1874static inline void btrfs_set_item_key(struct extent_buffer *eb, 1875 struct btrfs_disk_key *disk_key, int nr) 1876{ 1877 struct btrfs_item *item = btrfs_item_nr(nr); 1878 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1879} 1880 1881BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1882 1883/* 1884 * struct btrfs_root_ref 1885 */ 1886BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1887BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1888BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1889 1890/* struct btrfs_dir_item */ 1891BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1892BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1893BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1894BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1895BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1896BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1897 data_len, 16); 1898BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1899 name_len, 16); 1900BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1901 transid, 64); 1902 1903static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1904 const struct btrfs_dir_item *item, 1905 struct btrfs_disk_key *key) 1906{ 1907 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1908} 1909 1910static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1911 struct btrfs_dir_item *item, 1912 const struct btrfs_disk_key *key) 1913{ 1914 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1915} 1916 1917BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1918 num_entries, 64); 1919BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1920 num_bitmaps, 64); 1921BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1922 generation, 64); 1923 1924static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1925 const struct btrfs_free_space_header *h, 1926 struct btrfs_disk_key *key) 1927{ 1928 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1929} 1930 1931static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1932 struct btrfs_free_space_header *h, 1933 const struct btrfs_disk_key *key) 1934{ 1935 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1936} 1937 1938/* struct btrfs_disk_key */ 1939BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1940 objectid, 64); 1941BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1942BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1943 1944#ifdef __LITTLE_ENDIAN 1945 1946/* 1947 * Optimized helpers for little-endian architectures where CPU and on-disk 1948 * structures have the same endianness and we can skip conversions. 1949 */ 1950 1951static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key, 1952 const struct btrfs_disk_key *disk_key) 1953{ 1954 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key)); 1955} 1956 1957static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key, 1958 const struct btrfs_key *cpu_key) 1959{ 1960 memcpy(disk_key, cpu_key, sizeof(struct btrfs_key)); 1961} 1962 1963static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 1964 struct btrfs_key *cpu_key, int nr) 1965{ 1966 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1967 1968 btrfs_node_key(eb, disk_key, nr); 1969} 1970 1971static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 1972 struct btrfs_key *cpu_key, int nr) 1973{ 1974 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1975 1976 btrfs_item_key(eb, disk_key, nr); 1977} 1978 1979static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 1980 const struct btrfs_dir_item *item, 1981 struct btrfs_key *cpu_key) 1982{ 1983 struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key; 1984 1985 btrfs_dir_item_key(eb, item, disk_key); 1986} 1987 1988#else 1989 1990static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1991 const struct btrfs_disk_key *disk) 1992{ 1993 cpu->offset = le64_to_cpu(disk->offset); 1994 cpu->type = disk->type; 1995 cpu->objectid = le64_to_cpu(disk->objectid); 1996} 1997 1998static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1999 const struct btrfs_key *cpu) 2000{ 2001 disk->offset = cpu_to_le64(cpu->offset); 2002 disk->type = cpu->type; 2003 disk->objectid = cpu_to_le64(cpu->objectid); 2004} 2005 2006static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2007 struct btrfs_key *key, int nr) 2008{ 2009 struct btrfs_disk_key disk_key; 2010 btrfs_node_key(eb, &disk_key, nr); 2011 btrfs_disk_key_to_cpu(key, &disk_key); 2012} 2013 2014static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2015 struct btrfs_key *key, int nr) 2016{ 2017 struct btrfs_disk_key disk_key; 2018 btrfs_item_key(eb, &disk_key, nr); 2019 btrfs_disk_key_to_cpu(key, &disk_key); 2020} 2021 2022static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2023 const struct btrfs_dir_item *item, 2024 struct btrfs_key *key) 2025{ 2026 struct btrfs_disk_key disk_key; 2027 btrfs_dir_item_key(eb, item, &disk_key); 2028 btrfs_disk_key_to_cpu(key, &disk_key); 2029} 2030 2031#endif 2032 2033/* struct btrfs_header */ 2034BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2035BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2036 generation, 64); 2037BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2038BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2039BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2040BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2041BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2042 generation, 64); 2043BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2044BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2045 nritems, 32); 2046BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2047 2048static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2049{ 2050 return (btrfs_header_flags(eb) & flag) == flag; 2051} 2052 2053static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2054{ 2055 u64 flags = btrfs_header_flags(eb); 2056 btrfs_set_header_flags(eb, flags | flag); 2057} 2058 2059static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2060{ 2061 u64 flags = btrfs_header_flags(eb); 2062 btrfs_set_header_flags(eb, flags & ~flag); 2063} 2064 2065static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2066{ 2067 u64 flags = btrfs_header_flags(eb); 2068 return flags >> BTRFS_BACKREF_REV_SHIFT; 2069} 2070 2071static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2072 int rev) 2073{ 2074 u64 flags = btrfs_header_flags(eb); 2075 flags &= ~BTRFS_BACKREF_REV_MASK; 2076 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2077 btrfs_set_header_flags(eb, flags); 2078} 2079 2080static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2081{ 2082 return btrfs_header_level(eb) == 0; 2083} 2084 2085/* struct btrfs_root_item */ 2086BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2087 generation, 64); 2088BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2089BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2090BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2091 2092BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2093 generation, 64); 2094BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2095BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2096BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2097BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2098BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2099BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2100BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2101BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2102 last_snapshot, 64); 2103BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2104 generation_v2, 64); 2105BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2106 ctransid, 64); 2107BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2108 otransid, 64); 2109BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2110 stransid, 64); 2111BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2112 rtransid, 64); 2113 2114static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2115{ 2116 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2117} 2118 2119static inline bool btrfs_root_dead(const struct btrfs_root *root) 2120{ 2121 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2122} 2123 2124/* struct btrfs_root_backup */ 2125BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2126 tree_root, 64); 2127BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2128 tree_root_gen, 64); 2129BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2130 tree_root_level, 8); 2131 2132BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2133 chunk_root, 64); 2134BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2135 chunk_root_gen, 64); 2136BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2137 chunk_root_level, 8); 2138 2139BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2140 extent_root, 64); 2141BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2142 extent_root_gen, 64); 2143BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2144 extent_root_level, 8); 2145 2146BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2147 fs_root, 64); 2148BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2149 fs_root_gen, 64); 2150BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2151 fs_root_level, 8); 2152 2153BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2154 dev_root, 64); 2155BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2156 dev_root_gen, 64); 2157BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2158 dev_root_level, 8); 2159 2160BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2161 csum_root, 64); 2162BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2163 csum_root_gen, 64); 2164BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2165 csum_root_level, 8); 2166BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2167 total_bytes, 64); 2168BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2169 bytes_used, 64); 2170BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2171 num_devices, 64); 2172 2173/* struct btrfs_balance_item */ 2174BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2175 2176static inline void btrfs_balance_data(const struct extent_buffer *eb, 2177 const struct btrfs_balance_item *bi, 2178 struct btrfs_disk_balance_args *ba) 2179{ 2180 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2181} 2182 2183static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2184 struct btrfs_balance_item *bi, 2185 const struct btrfs_disk_balance_args *ba) 2186{ 2187 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2188} 2189 2190static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2191 const struct btrfs_balance_item *bi, 2192 struct btrfs_disk_balance_args *ba) 2193{ 2194 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2195} 2196 2197static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2198 struct btrfs_balance_item *bi, 2199 const struct btrfs_disk_balance_args *ba) 2200{ 2201 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2202} 2203 2204static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2205 const struct btrfs_balance_item *bi, 2206 struct btrfs_disk_balance_args *ba) 2207{ 2208 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2209} 2210 2211static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2212 struct btrfs_balance_item *bi, 2213 const struct btrfs_disk_balance_args *ba) 2214{ 2215 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2216} 2217 2218static inline void 2219btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2220 const struct btrfs_disk_balance_args *disk) 2221{ 2222 memset(cpu, 0, sizeof(*cpu)); 2223 2224 cpu->profiles = le64_to_cpu(disk->profiles); 2225 cpu->usage = le64_to_cpu(disk->usage); 2226 cpu->devid = le64_to_cpu(disk->devid); 2227 cpu->pstart = le64_to_cpu(disk->pstart); 2228 cpu->pend = le64_to_cpu(disk->pend); 2229 cpu->vstart = le64_to_cpu(disk->vstart); 2230 cpu->vend = le64_to_cpu(disk->vend); 2231 cpu->target = le64_to_cpu(disk->target); 2232 cpu->flags = le64_to_cpu(disk->flags); 2233 cpu->limit = le64_to_cpu(disk->limit); 2234 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2235 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2236} 2237 2238static inline void 2239btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2240 const struct btrfs_balance_args *cpu) 2241{ 2242 memset(disk, 0, sizeof(*disk)); 2243 2244 disk->profiles = cpu_to_le64(cpu->profiles); 2245 disk->usage = cpu_to_le64(cpu->usage); 2246 disk->devid = cpu_to_le64(cpu->devid); 2247 disk->pstart = cpu_to_le64(cpu->pstart); 2248 disk->pend = cpu_to_le64(cpu->pend); 2249 disk->vstart = cpu_to_le64(cpu->vstart); 2250 disk->vend = cpu_to_le64(cpu->vend); 2251 disk->target = cpu_to_le64(cpu->target); 2252 disk->flags = cpu_to_le64(cpu->flags); 2253 disk->limit = cpu_to_le64(cpu->limit); 2254 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2255 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2256} 2257 2258/* struct btrfs_super_block */ 2259BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2260BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2261BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2262 generation, 64); 2263BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2264BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2265 struct btrfs_super_block, sys_chunk_array_size, 32); 2266BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2267 struct btrfs_super_block, chunk_root_generation, 64); 2268BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2269 root_level, 8); 2270BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2271 chunk_root, 64); 2272BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2273 chunk_root_level, 8); 2274BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2275 log_root, 64); 2276BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2277 log_root_transid, 64); 2278BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2279 log_root_level, 8); 2280BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2281 total_bytes, 64); 2282BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2283 bytes_used, 64); 2284BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2285 sectorsize, 32); 2286BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2287 nodesize, 32); 2288BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2289 stripesize, 32); 2290BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2291 root_dir_objectid, 64); 2292BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2293 num_devices, 64); 2294BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2295 compat_flags, 64); 2296BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2297 compat_ro_flags, 64); 2298BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2299 incompat_flags, 64); 2300BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2301 csum_type, 16); 2302BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2303 cache_generation, 64); 2304BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2305BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2306 uuid_tree_generation, 64); 2307 2308int btrfs_super_csum_size(const struct btrfs_super_block *s); 2309const char *btrfs_super_csum_name(u16 csum_type); 2310const char *btrfs_super_csum_driver(u16 csum_type); 2311size_t __attribute_const__ btrfs_get_num_csums(void); 2312 2313 2314/* 2315 * The leaf data grows from end-to-front in the node. 2316 * this returns the address of the start of the last item, 2317 * which is the stop of the leaf data stack 2318 */ 2319static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) 2320{ 2321 u32 nr = btrfs_header_nritems(leaf); 2322 2323 if (nr == 0) 2324 return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); 2325 return btrfs_item_offset_nr(leaf, nr - 1); 2326} 2327 2328/* struct btrfs_file_extent_item */ 2329BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item, 2330 type, 8); 2331BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2332 struct btrfs_file_extent_item, disk_bytenr, 64); 2333BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2334 struct btrfs_file_extent_item, offset, 64); 2335BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2336 struct btrfs_file_extent_item, generation, 64); 2337BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2338 struct btrfs_file_extent_item, num_bytes, 64); 2339BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes, 2340 struct btrfs_file_extent_item, ram_bytes, 64); 2341BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2342 struct btrfs_file_extent_item, disk_num_bytes, 64); 2343BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2344 struct btrfs_file_extent_item, compression, 8); 2345 2346static inline unsigned long 2347btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2348{ 2349 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2350} 2351 2352static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2353{ 2354 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2355} 2356 2357BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2358BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2359 disk_bytenr, 64); 2360BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2361 generation, 64); 2362BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2363 disk_num_bytes, 64); 2364BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2365 offset, 64); 2366BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2367 num_bytes, 64); 2368BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2369 ram_bytes, 64); 2370BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2371 compression, 8); 2372BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2373 encryption, 8); 2374BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2375 other_encoding, 16); 2376 2377/* 2378 * this returns the number of bytes used by the item on disk, minus the 2379 * size of any extent headers. If a file is compressed on disk, this is 2380 * the compressed size 2381 */ 2382static inline u32 btrfs_file_extent_inline_item_len( 2383 const struct extent_buffer *eb, 2384 struct btrfs_item *e) 2385{ 2386 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2387} 2388 2389/* btrfs_qgroup_status_item */ 2390BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2391 generation, 64); 2392BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2393 version, 64); 2394BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2395 flags, 64); 2396BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2397 rescan, 64); 2398 2399/* btrfs_qgroup_info_item */ 2400BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2401 generation, 64); 2402BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2403BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2404 rfer_cmpr, 64); 2405BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2406BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2407 excl_cmpr, 64); 2408 2409BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2410 struct btrfs_qgroup_info_item, generation, 64); 2411BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2412 rfer, 64); 2413BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2414 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2415BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2416 excl, 64); 2417BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2418 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2419 2420/* btrfs_qgroup_limit_item */ 2421BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2422 flags, 64); 2423BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2424 max_rfer, 64); 2425BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2426 max_excl, 64); 2427BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2428 rsv_rfer, 64); 2429BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2430 rsv_excl, 64); 2431 2432/* btrfs_dev_replace_item */ 2433BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2434 struct btrfs_dev_replace_item, src_devid, 64); 2435BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2436 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2437 64); 2438BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2439 replace_state, 64); 2440BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2441 time_started, 64); 2442BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2443 time_stopped, 64); 2444BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2445 num_write_errors, 64); 2446BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2447 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2448 64); 2449BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2450 cursor_left, 64); 2451BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2452 cursor_right, 64); 2453 2454BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2455 struct btrfs_dev_replace_item, src_devid, 64); 2456BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2457 struct btrfs_dev_replace_item, 2458 cont_reading_from_srcdev_mode, 64); 2459BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2460 struct btrfs_dev_replace_item, replace_state, 64); 2461BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2462 struct btrfs_dev_replace_item, time_started, 64); 2463BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2464 struct btrfs_dev_replace_item, time_stopped, 64); 2465BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2466 struct btrfs_dev_replace_item, num_write_errors, 64); 2467BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2468 struct btrfs_dev_replace_item, 2469 num_uncorrectable_read_errors, 64); 2470BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2471 struct btrfs_dev_replace_item, cursor_left, 64); 2472BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2473 struct btrfs_dev_replace_item, cursor_right, 64); 2474 2475/* helper function to cast into the data area of the leaf. */ 2476#define btrfs_item_ptr(leaf, slot, type) \ 2477 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2478 btrfs_item_offset_nr(leaf, slot))) 2479 2480#define btrfs_item_ptr_offset(leaf, slot) \ 2481 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2482 btrfs_item_offset_nr(leaf, slot))) 2483 2484static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) 2485{ 2486 return crc32c(crc, address, length); 2487} 2488 2489static inline void btrfs_crc32c_final(u32 crc, u8 *result) 2490{ 2491 put_unaligned_le32(~crc, result); 2492} 2493 2494static inline u64 btrfs_name_hash(const char *name, int len) 2495{ 2496 return crc32c((u32)~1, name, len); 2497} 2498 2499/* 2500 * Figure the key offset of an extended inode ref 2501 */ 2502static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2503 int len) 2504{ 2505 return (u64) crc32c(parent_objectid, name, len); 2506} 2507 2508static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2509{ 2510 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2511} 2512 2513/* extent-tree.c */ 2514 2515enum btrfs_inline_ref_type { 2516 BTRFS_REF_TYPE_INVALID, 2517 BTRFS_REF_TYPE_BLOCK, 2518 BTRFS_REF_TYPE_DATA, 2519 BTRFS_REF_TYPE_ANY, 2520}; 2521 2522int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2523 struct btrfs_extent_inline_ref *iref, 2524 enum btrfs_inline_ref_type is_data); 2525u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); 2526 2527u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2528 2529/* 2530 * Use this if we would be adding new items, as we could split nodes as we cow 2531 * down the tree. 2532 */ 2533static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, 2534 unsigned num_items) 2535{ 2536 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2537} 2538 2539/* 2540 * Doing a truncate or a modification won't result in new nodes or leaves, just 2541 * what we need for COW. 2542 */ 2543static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, 2544 unsigned num_items) 2545{ 2546 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2547} 2548 2549int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, 2550 u64 start, u64 num_bytes); 2551void btrfs_free_excluded_extents(struct btrfs_block_group *cache); 2552int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2553 unsigned long count); 2554void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, 2555 struct btrfs_delayed_ref_root *delayed_refs, 2556 struct btrfs_delayed_ref_head *head); 2557int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2558int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2559 struct btrfs_fs_info *fs_info, u64 bytenr, 2560 u64 offset, int metadata, u64 *refs, u64 *flags); 2561int btrfs_pin_extent(struct btrfs_trans_handle *trans, u64 bytenr, u64 num, 2562 int reserved); 2563int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans, 2564 u64 bytenr, u64 num_bytes); 2565int btrfs_exclude_logged_extents(struct extent_buffer *eb); 2566int btrfs_cross_ref_exist(struct btrfs_root *root, 2567 u64 objectid, u64 offset, u64 bytenr, bool strict); 2568struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2569 struct btrfs_root *root, 2570 u64 parent, u64 root_objectid, 2571 const struct btrfs_disk_key *key, 2572 int level, u64 hint, 2573 u64 empty_size, 2574 enum btrfs_lock_nesting nest); 2575void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2576 struct btrfs_root *root, 2577 struct extent_buffer *buf, 2578 u64 parent, int last_ref); 2579int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2580 struct btrfs_root *root, u64 owner, 2581 u64 offset, u64 ram_bytes, 2582 struct btrfs_key *ins); 2583int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2584 u64 root_objectid, u64 owner, u64 offset, 2585 struct btrfs_key *ins); 2586int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2587 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2588 struct btrfs_key *ins, int is_data, int delalloc); 2589int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2590 struct extent_buffer *buf, int full_backref); 2591int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2592 struct extent_buffer *buf, int full_backref); 2593int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2594 struct extent_buffer *eb, u64 flags, 2595 int level, int is_data); 2596int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); 2597 2598int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2599 u64 start, u64 len, int delalloc); 2600int btrfs_pin_reserved_extent(struct btrfs_trans_handle *trans, u64 start, 2601 u64 len); 2602int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2603int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2604 struct btrfs_ref *generic_ref); 2605 2606int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2607void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2608 2609/* 2610 * Different levels for to flush space when doing space reservations. 2611 * 2612 * The higher the level, the more methods we try to reclaim space. 2613 */ 2614enum btrfs_reserve_flush_enum { 2615 /* If we are in the transaction, we can't flush anything.*/ 2616 BTRFS_RESERVE_NO_FLUSH, 2617 2618 /* 2619 * Flush space by: 2620 * - Running delayed inode items 2621 * - Allocating a new chunk 2622 */ 2623 BTRFS_RESERVE_FLUSH_LIMIT, 2624 2625 /* 2626 * Flush space by: 2627 * - Running delayed inode items 2628 * - Running delayed refs 2629 * - Running delalloc and waiting for ordered extents 2630 * - Allocating a new chunk 2631 */ 2632 BTRFS_RESERVE_FLUSH_EVICT, 2633 2634 /* 2635 * Flush space by above mentioned methods and by: 2636 * - Running delayed iputs 2637 * - Commiting transaction 2638 * 2639 * Can be interruped by fatal signal. 2640 */ 2641 BTRFS_RESERVE_FLUSH_DATA, 2642 BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE, 2643 BTRFS_RESERVE_FLUSH_ALL, 2644 2645 /* 2646 * Pretty much the same as FLUSH_ALL, but can also steal space from 2647 * global rsv. 2648 * 2649 * Can be interruped by fatal signal. 2650 */ 2651 BTRFS_RESERVE_FLUSH_ALL_STEAL, 2652}; 2653 2654enum btrfs_flush_state { 2655 FLUSH_DELAYED_ITEMS_NR = 1, 2656 FLUSH_DELAYED_ITEMS = 2, 2657 FLUSH_DELAYED_REFS_NR = 3, 2658 FLUSH_DELAYED_REFS = 4, 2659 FLUSH_DELALLOC = 5, 2660 FLUSH_DELALLOC_WAIT = 6, 2661 ALLOC_CHUNK = 7, 2662 ALLOC_CHUNK_FORCE = 8, 2663 RUN_DELAYED_IPUTS = 9, 2664 COMMIT_TRANS = 10, 2665}; 2666 2667int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2668 struct btrfs_block_rsv *rsv, 2669 int nitems, bool use_global_rsv); 2670void btrfs_subvolume_release_metadata(struct btrfs_root *root, 2671 struct btrfs_block_rsv *rsv); 2672void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2673 2674int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2675u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2676int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2677 u64 start, u64 end); 2678int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2679 u64 num_bytes, u64 *actual_bytes); 2680int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2681 2682int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2683int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2684 struct btrfs_fs_info *fs_info); 2685int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2686void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2687void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2688 2689/* ctree.c */ 2690int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2691 int *slot); 2692int __pure btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2693int btrfs_previous_item(struct btrfs_root *root, 2694 struct btrfs_path *path, u64 min_objectid, 2695 int type); 2696int btrfs_previous_extent_item(struct btrfs_root *root, 2697 struct btrfs_path *path, u64 min_objectid); 2698void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2699 struct btrfs_path *path, 2700 const struct btrfs_key *new_key); 2701struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2702int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2703 struct btrfs_key *key, int lowest_level, 2704 u64 min_trans); 2705int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2706 struct btrfs_path *path, 2707 u64 min_trans); 2708struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, 2709 int slot); 2710 2711int btrfs_cow_block(struct btrfs_trans_handle *trans, 2712 struct btrfs_root *root, struct extent_buffer *buf, 2713 struct extent_buffer *parent, int parent_slot, 2714 struct extent_buffer **cow_ret, 2715 enum btrfs_lock_nesting nest); 2716int btrfs_copy_root(struct btrfs_trans_handle *trans, 2717 struct btrfs_root *root, 2718 struct extent_buffer *buf, 2719 struct extent_buffer **cow_ret, u64 new_root_objectid); 2720int btrfs_block_can_be_shared(struct btrfs_root *root, 2721 struct extent_buffer *buf); 2722void btrfs_extend_item(struct btrfs_path *path, u32 data_size); 2723void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); 2724int btrfs_split_item(struct btrfs_trans_handle *trans, 2725 struct btrfs_root *root, 2726 struct btrfs_path *path, 2727 const struct btrfs_key *new_key, 2728 unsigned long split_offset); 2729int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2730 struct btrfs_root *root, 2731 struct btrfs_path *path, 2732 const struct btrfs_key *new_key); 2733int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2734 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2735int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2736 const struct btrfs_key *key, struct btrfs_path *p, 2737 int ins_len, int cow); 2738int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2739 struct btrfs_path *p, u64 time_seq); 2740int btrfs_search_slot_for_read(struct btrfs_root *root, 2741 const struct btrfs_key *key, 2742 struct btrfs_path *p, int find_higher, 2743 int return_any); 2744int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2745 struct btrfs_root *root, struct extent_buffer *parent, 2746 int start_slot, u64 *last_ret, 2747 struct btrfs_key *progress); 2748void btrfs_release_path(struct btrfs_path *p); 2749struct btrfs_path *btrfs_alloc_path(void); 2750void btrfs_free_path(struct btrfs_path *p); 2751 2752int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2753 struct btrfs_path *path, int slot, int nr); 2754static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2755 struct btrfs_root *root, 2756 struct btrfs_path *path) 2757{ 2758 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2759} 2760 2761void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2762 const struct btrfs_key *cpu_key, u32 *data_size, 2763 int nr); 2764int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2765 const struct btrfs_key *key, void *data, u32 data_size); 2766int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2767 struct btrfs_root *root, 2768 struct btrfs_path *path, 2769 const struct btrfs_key *cpu_key, u32 *data_size, 2770 int nr); 2771 2772static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2773 struct btrfs_root *root, 2774 struct btrfs_path *path, 2775 const struct btrfs_key *key, 2776 u32 data_size) 2777{ 2778 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2779} 2780 2781int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2782int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2783int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2784 u64 time_seq); 2785static inline int btrfs_next_old_item(struct btrfs_root *root, 2786 struct btrfs_path *p, u64 time_seq) 2787{ 2788 ++p->slots[0]; 2789 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2790 return btrfs_next_old_leaf(root, p, time_seq); 2791 return 0; 2792} 2793static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2794{ 2795 return btrfs_next_old_item(root, p, 0); 2796} 2797int btrfs_leaf_free_space(struct extent_buffer *leaf); 2798int __must_check btrfs_drop_snapshot(struct btrfs_root *root, int update_ref, 2799 int for_reloc); 2800int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2801 struct btrfs_root *root, 2802 struct extent_buffer *node, 2803 struct extent_buffer *parent); 2804static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2805{ 2806 /* 2807 * Do it this way so we only ever do one test_bit in the normal case. 2808 */ 2809 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2810 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2811 return 2; 2812 return 1; 2813 } 2814 return 0; 2815} 2816 2817/* 2818 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2819 * anything except sleeping. This function is used to check the status of 2820 * the fs. 2821 */ 2822static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2823{ 2824 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2825} 2826 2827/* tree mod log functions from ctree.c */ 2828u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2829 struct seq_list *elem); 2830void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2831 struct seq_list *elem); 2832int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2833 2834/* root-item.c */ 2835int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2836 u64 ref_id, u64 dirid, u64 sequence, const char *name, 2837 int name_len); 2838int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, 2839 u64 ref_id, u64 dirid, u64 *sequence, const char *name, 2840 int name_len); 2841int btrfs_del_root(struct btrfs_trans_handle *trans, 2842 const struct btrfs_key *key); 2843int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2844 const struct btrfs_key *key, 2845 struct btrfs_root_item *item); 2846int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2847 struct btrfs_root *root, 2848 struct btrfs_key *key, 2849 struct btrfs_root_item *item); 2850int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2851 struct btrfs_path *path, struct btrfs_root_item *root_item, 2852 struct btrfs_key *root_key); 2853int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2854void btrfs_set_root_node(struct btrfs_root_item *item, 2855 struct extent_buffer *node); 2856void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2857void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2858 struct btrfs_root *root); 2859 2860/* uuid-tree.c */ 2861int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2862 u64 subid); 2863int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, 2864 u64 subid); 2865int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info); 2866 2867/* dir-item.c */ 2868int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2869 const char *name, int name_len); 2870int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, 2871 int name_len, struct btrfs_inode *dir, 2872 struct btrfs_key *location, u8 type, u64 index); 2873struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2874 struct btrfs_root *root, 2875 struct btrfs_path *path, u64 dir, 2876 const char *name, int name_len, 2877 int mod); 2878struct btrfs_dir_item * 2879btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2880 struct btrfs_root *root, 2881 struct btrfs_path *path, u64 dir, 2882 u64 objectid, const char *name, int name_len, 2883 int mod); 2884struct btrfs_dir_item * 2885btrfs_search_dir_index_item(struct btrfs_root *root, 2886 struct btrfs_path *path, u64 dirid, 2887 const char *name, int name_len); 2888int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2889 struct btrfs_root *root, 2890 struct btrfs_path *path, 2891 struct btrfs_dir_item *di); 2892int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2893 struct btrfs_root *root, 2894 struct btrfs_path *path, u64 objectid, 2895 const char *name, u16 name_len, 2896 const void *data, u16 data_len); 2897struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2898 struct btrfs_root *root, 2899 struct btrfs_path *path, u64 dir, 2900 const char *name, u16 name_len, 2901 int mod); 2902struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 2903 struct btrfs_path *path, 2904 const char *name, 2905 int name_len); 2906 2907/* orphan.c */ 2908int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2909 struct btrfs_root *root, u64 offset); 2910int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2911 struct btrfs_root *root, u64 offset); 2912int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2913 2914/* inode-item.c */ 2915int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2916 struct btrfs_root *root, 2917 const char *name, int name_len, 2918 u64 inode_objectid, u64 ref_objectid, u64 index); 2919int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2920 struct btrfs_root *root, 2921 const char *name, int name_len, 2922 u64 inode_objectid, u64 ref_objectid, u64 *index); 2923int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2924 struct btrfs_root *root, 2925 struct btrfs_path *path, u64 objectid); 2926int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2927 *root, struct btrfs_path *path, 2928 struct btrfs_key *location, int mod); 2929 2930struct btrfs_inode_extref * 2931btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 2932 struct btrfs_root *root, 2933 struct btrfs_path *path, 2934 const char *name, int name_len, 2935 u64 inode_objectid, u64 ref_objectid, int ins_len, 2936 int cow); 2937 2938struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, 2939 int slot, const char *name, 2940 int name_len); 2941struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( 2942 struct extent_buffer *leaf, int slot, u64 ref_objectid, 2943 const char *name, int name_len); 2944/* file-item.c */ 2945struct btrfs_dio_private; 2946int btrfs_del_csums(struct btrfs_trans_handle *trans, 2947 struct btrfs_root *root, u64 bytenr, u64 len); 2948blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, 2949 u64 offset, u8 *dst); 2950int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2951 struct btrfs_root *root, 2952 u64 objectid, u64 pos, 2953 u64 disk_offset, u64 disk_num_bytes, 2954 u64 num_bytes, u64 offset, u64 ram_bytes, 2955 u8 compression, u8 encryption, u16 other_encoding); 2956int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2957 struct btrfs_root *root, 2958 struct btrfs_path *path, u64 objectid, 2959 u64 bytenr, int mod); 2960int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2961 struct btrfs_root *root, 2962 struct btrfs_ordered_sum *sums); 2963blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, 2964 u64 file_start, int contig); 2965int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 2966 struct list_head *list, int search_commit); 2967void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 2968 const struct btrfs_path *path, 2969 struct btrfs_file_extent_item *fi, 2970 const bool new_inline, 2971 struct extent_map *em); 2972int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start, 2973 u64 len); 2974int btrfs_inode_set_file_extent_range(struct btrfs_inode *inode, u64 start, 2975 u64 len); 2976void btrfs_inode_safe_disk_i_size_write(struct inode *inode, u64 new_i_size); 2977u64 btrfs_file_extent_end(const struct btrfs_path *path); 2978 2979/* inode.c */ 2980blk_status_t btrfs_submit_data_bio(struct inode *inode, struct bio *bio, 2981 int mirror_num, unsigned long bio_flags); 2982int btrfs_verify_data_csum(struct btrfs_io_bio *io_bio, u64 phy_offset, 2983 struct page *page, u64 start, u64 end, int mirror); 2984struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 2985 u64 start, u64 len); 2986noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 2987 u64 *orig_start, u64 *orig_block_len, 2988 u64 *ram_bytes, bool strict); 2989 2990void __btrfs_del_delalloc_inode(struct btrfs_root *root, 2991 struct btrfs_inode *inode); 2992struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2993int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 2994int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2995 struct btrfs_root *root, 2996 struct btrfs_inode *dir, struct btrfs_inode *inode, 2997 const char *name, int name_len); 2998int btrfs_add_link(struct btrfs_trans_handle *trans, 2999 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3000 const char *name, int name_len, int add_backref, u64 index); 3001int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); 3002int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3003 int front); 3004int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3005 struct btrfs_root *root, 3006 struct inode *inode, u64 new_size, 3007 u32 min_type); 3008 3009int btrfs_start_delalloc_snapshot(struct btrfs_root *root); 3010int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, u64 nr, 3011 bool in_reclaim_context); 3012int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, 3013 unsigned int extra_bits, 3014 struct extent_state **cached_state); 3015int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3016 struct btrfs_root *new_root, 3017 struct btrfs_root *parent_root, 3018 u64 new_dirid); 3019 void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, 3020 unsigned *bits); 3021void btrfs_clear_delalloc_extent(struct inode *inode, 3022 struct extent_state *state, unsigned *bits); 3023void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, 3024 struct extent_state *other); 3025void btrfs_split_delalloc_extent(struct inode *inode, 3026 struct extent_state *orig, u64 split); 3027int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, 3028 unsigned long bio_flags); 3029void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); 3030vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); 3031int btrfs_readpage(struct file *file, struct page *page); 3032void btrfs_evict_inode(struct inode *inode); 3033int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3034struct inode *btrfs_alloc_inode(struct super_block *sb); 3035void btrfs_destroy_inode(struct inode *inode); 3036void btrfs_free_inode(struct inode *inode); 3037int btrfs_drop_inode(struct inode *inode); 3038int __init btrfs_init_cachep(void); 3039void __cold btrfs_destroy_cachep(void); 3040struct inode *btrfs_iget_path(struct super_block *s, u64 ino, 3041 struct btrfs_root *root, struct btrfs_path *path); 3042struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); 3043struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3044 struct page *page, size_t pg_offset, 3045 u64 start, u64 end); 3046int btrfs_update_inode(struct btrfs_trans_handle *trans, 3047 struct btrfs_root *root, 3048 struct inode *inode); 3049int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3050 struct btrfs_root *root, struct inode *inode); 3051int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3052 struct btrfs_inode *inode); 3053int btrfs_orphan_cleanup(struct btrfs_root *root); 3054int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3055void btrfs_add_delayed_iput(struct inode *inode); 3056void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3057int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); 3058int btrfs_prealloc_file_range(struct inode *inode, int mode, 3059 u64 start, u64 num_bytes, u64 min_size, 3060 loff_t actual_len, u64 *alloc_hint); 3061int btrfs_prealloc_file_range_trans(struct inode *inode, 3062 struct btrfs_trans_handle *trans, int mode, 3063 u64 start, u64 num_bytes, u64 min_size, 3064 loff_t actual_len, u64 *alloc_hint); 3065int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, 3066 u64 start, u64 end, int *page_started, unsigned long *nr_written, 3067 struct writeback_control *wbc); 3068int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); 3069void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, 3070 u64 end, int uptodate); 3071extern const struct dentry_operations btrfs_dentry_operations; 3072ssize_t btrfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter); 3073 3074/* ioctl.c */ 3075long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3076long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3077int btrfs_ioctl_get_supported_features(void __user *arg); 3078void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); 3079int __pure btrfs_is_empty_uuid(u8 *uuid); 3080int btrfs_defrag_file(struct inode *inode, struct file *file, 3081 struct btrfs_ioctl_defrag_range_args *range, 3082 u64 newer_than, unsigned long max_pages); 3083void btrfs_get_block_group_info(struct list_head *groups_list, 3084 struct btrfs_ioctl_space_info *space); 3085void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, 3086 struct btrfs_ioctl_balance_args *bargs); 3087bool btrfs_exclop_start(struct btrfs_fs_info *fs_info, 3088 enum btrfs_exclusive_operation type); 3089void btrfs_exclop_finish(struct btrfs_fs_info *fs_info); 3090 3091/* file.c */ 3092int __init btrfs_auto_defrag_init(void); 3093void __cold btrfs_auto_defrag_exit(void); 3094int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3095 struct btrfs_inode *inode); 3096int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3097void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3098int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3099void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3100 int skip_pinned); 3101extern const struct file_operations btrfs_file_operations; 3102int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3103 struct btrfs_root *root, struct btrfs_inode *inode, 3104 struct btrfs_path *path, u64 start, u64 end, 3105 u64 *drop_end, int drop_cache, 3106 int replace_extent, 3107 u32 extent_item_size, 3108 int *key_inserted); 3109int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3110 struct btrfs_root *root, struct inode *inode, u64 start, 3111 u64 end, int drop_cache); 3112int btrfs_replace_file_extents(struct inode *inode, struct btrfs_path *path, 3113 const u64 start, const u64 end, 3114 struct btrfs_replace_extent_info *extent_info, 3115 struct btrfs_trans_handle **trans_out); 3116int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3117 struct btrfs_inode *inode, u64 start, u64 end); 3118int btrfs_release_file(struct inode *inode, struct file *file); 3119int btrfs_dirty_pages(struct btrfs_inode *inode, struct page **pages, 3120 size_t num_pages, loff_t pos, size_t write_bytes, 3121 struct extent_state **cached); 3122int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3123int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, 3124 size_t *write_bytes); 3125void btrfs_check_nocow_unlock(struct btrfs_inode *inode); 3126 3127/* tree-defrag.c */ 3128int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3129 struct btrfs_root *root); 3130 3131/* super.c */ 3132int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3133 unsigned long new_flags); 3134int btrfs_sync_fs(struct super_block *sb, int wait); 3135char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, 3136 u64 subvol_objectid); 3137 3138static inline __printf(2, 3) __cold 3139void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3140{ 3141} 3142 3143#ifdef CONFIG_PRINTK 3144__printf(2, 3) 3145__cold 3146void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3147#else 3148#define btrfs_printk(fs_info, fmt, args...) \ 3149 btrfs_no_printk(fs_info, fmt, ##args) 3150#endif 3151 3152#define btrfs_emerg(fs_info, fmt, args...) \ 3153 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3154#define btrfs_alert(fs_info, fmt, args...) \ 3155 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3156#define btrfs_crit(fs_info, fmt, args...) \ 3157 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3158#define btrfs_err(fs_info, fmt, args...) \ 3159 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3160#define btrfs_warn(fs_info, fmt, args...) \ 3161 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3162#define btrfs_notice(fs_info, fmt, args...) \ 3163 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3164#define btrfs_info(fs_info, fmt, args...) \ 3165 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3166 3167/* 3168 * Wrappers that use printk_in_rcu 3169 */ 3170#define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3171 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3172#define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3173 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3174#define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3175 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3176#define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3177 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3178#define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3179 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3180#define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3181 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3182#define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3183 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3184 3185/* 3186 * Wrappers that use a ratelimited printk_in_rcu 3187 */ 3188#define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3189 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3190#define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3191 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3192#define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3193 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3194#define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3195 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3196#define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3197 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3198#define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3199 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3200#define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3201 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3202 3203/* 3204 * Wrappers that use a ratelimited printk 3205 */ 3206#define btrfs_emerg_rl(fs_info, fmt, args...) \ 3207 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3208#define btrfs_alert_rl(fs_info, fmt, args...) \ 3209 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3210#define btrfs_crit_rl(fs_info, fmt, args...) \ 3211 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3212#define btrfs_err_rl(fs_info, fmt, args...) \ 3213 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3214#define btrfs_warn_rl(fs_info, fmt, args...) \ 3215 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3216#define btrfs_notice_rl(fs_info, fmt, args...) \ 3217 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3218#define btrfs_info_rl(fs_info, fmt, args...) \ 3219 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3220 3221#if defined(CONFIG_DYNAMIC_DEBUG) 3222#define btrfs_debug(fs_info, fmt, args...) \ 3223 _dynamic_func_call_no_desc(fmt, btrfs_printk, \ 3224 fs_info, KERN_DEBUG fmt, ##args) 3225#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3226 _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ 3227 fs_info, KERN_DEBUG fmt, ##args) 3228#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3229 _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ 3230 fs_info, KERN_DEBUG fmt, ##args) 3231#define btrfs_debug_rl(fs_info, fmt, args...) \ 3232 _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ 3233 fs_info, KERN_DEBUG fmt, ##args) 3234#elif defined(DEBUG) 3235#define btrfs_debug(fs_info, fmt, args...) \ 3236 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3237#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3238 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3239#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3240 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3241#define btrfs_debug_rl(fs_info, fmt, args...) \ 3242 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3243#else 3244#define btrfs_debug(fs_info, fmt, args...) \ 3245 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3246#define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3247 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3248#define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3249 btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3250#define btrfs_debug_rl(fs_info, fmt, args...) \ 3251 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3252#endif 3253 3254#define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3255do { \ 3256 rcu_read_lock(); \ 3257 btrfs_printk(fs_info, fmt, ##args); \ 3258 rcu_read_unlock(); \ 3259} while (0) 3260 3261#define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ 3262do { \ 3263 rcu_read_lock(); \ 3264 btrfs_no_printk(fs_info, fmt, ##args); \ 3265 rcu_read_unlock(); \ 3266} while (0) 3267 3268#define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3269do { \ 3270 static DEFINE_RATELIMIT_STATE(_rs, \ 3271 DEFAULT_RATELIMIT_INTERVAL, \ 3272 DEFAULT_RATELIMIT_BURST); \ 3273 if (__ratelimit(&_rs)) \ 3274 btrfs_printk(fs_info, fmt, ##args); \ 3275} while (0) 3276 3277#define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3278do { \ 3279 rcu_read_lock(); \ 3280 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3281 rcu_read_unlock(); \ 3282} while (0) 3283 3284#ifdef CONFIG_BTRFS_ASSERT 3285__cold __noreturn 3286static inline void assertfail(const char *expr, const char *file, int line) 3287{ 3288 pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); 3289 BUG(); 3290} 3291 3292#define ASSERT(expr) \ 3293 (likely(expr) ? (void)0 : assertfail(#expr, __FILE__, __LINE__)) 3294 3295#else 3296static inline void assertfail(const char *expr, const char* file, int line) { } 3297#define ASSERT(expr) (void)(expr) 3298#endif 3299 3300/* 3301 * Use that for functions that are conditionally exported for sanity tests but 3302 * otherwise static 3303 */ 3304#ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3305#define EXPORT_FOR_TESTS static 3306#else 3307#define EXPORT_FOR_TESTS 3308#endif 3309 3310__cold 3311static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) 3312{ 3313 btrfs_err(fs_info, 3314"Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); 3315} 3316 3317__printf(5, 6) 3318__cold 3319void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3320 unsigned int line, int errno, const char *fmt, ...); 3321 3322const char * __attribute_const__ btrfs_decode_error(int errno); 3323 3324__cold 3325void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3326 const char *function, 3327 unsigned int line, int errno); 3328 3329/* 3330 * Call btrfs_abort_transaction as early as possible when an error condition is 3331 * detected, that way the exact line number is reported. 3332 */ 3333#define btrfs_abort_transaction(trans, errno) \ 3334do { \ 3335 /* Report first abort since mount */ \ 3336 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3337 &((trans)->fs_info->fs_state))) { \ 3338 if ((errno) != -EIO && (errno) != -EROFS) { \ 3339 WARN(1, KERN_DEBUG \ 3340 "BTRFS: Transaction aborted (error %d)\n", \ 3341 (errno)); \ 3342 } else { \ 3343 btrfs_debug((trans)->fs_info, \ 3344 "Transaction aborted (error %d)", \ 3345 (errno)); \ 3346 } \ 3347 } \ 3348 __btrfs_abort_transaction((trans), __func__, \ 3349 __LINE__, (errno)); \ 3350} while (0) 3351 3352#define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3353do { \ 3354 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3355 (errno), fmt, ##args); \ 3356} while (0) 3357 3358__printf(5, 6) 3359__cold 3360void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3361 unsigned int line, int errno, const char *fmt, ...); 3362/* 3363 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3364 * will panic(). Otherwise we BUG() here. 3365 */ 3366#define btrfs_panic(fs_info, errno, fmt, args...) \ 3367do { \ 3368 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3369 BUG(); \ 3370} while (0) 3371 3372 3373/* compatibility and incompatibility defines */ 3374 3375#define btrfs_set_fs_incompat(__fs_info, opt) \ 3376 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3377 #opt) 3378 3379static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3380 u64 flag, const char* name) 3381{ 3382 struct btrfs_super_block *disk_super; 3383 u64 features; 3384 3385 disk_super = fs_info->super_copy; 3386 features = btrfs_super_incompat_flags(disk_super); 3387 if (!(features & flag)) { 3388 spin_lock(&fs_info->super_lock); 3389 features = btrfs_super_incompat_flags(disk_super); 3390 if (!(features & flag)) { 3391 features |= flag; 3392 btrfs_set_super_incompat_flags(disk_super, features); 3393 btrfs_info(fs_info, 3394 "setting incompat feature flag for %s (0x%llx)", 3395 name, flag); 3396 } 3397 spin_unlock(&fs_info->super_lock); 3398 } 3399} 3400 3401#define btrfs_clear_fs_incompat(__fs_info, opt) \ 3402 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ 3403 #opt) 3404 3405static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3406 u64 flag, const char* name) 3407{ 3408 struct btrfs_super_block *disk_super; 3409 u64 features; 3410 3411 disk_super = fs_info->super_copy; 3412 features = btrfs_super_incompat_flags(disk_super); 3413 if (features & flag) { 3414 spin_lock(&fs_info->super_lock); 3415 features = btrfs_super_incompat_flags(disk_super); 3416 if (features & flag) { 3417 features &= ~flag; 3418 btrfs_set_super_incompat_flags(disk_super, features); 3419 btrfs_info(fs_info, 3420 "clearing incompat feature flag for %s (0x%llx)", 3421 name, flag); 3422 } 3423 spin_unlock(&fs_info->super_lock); 3424 } 3425} 3426 3427#define btrfs_fs_incompat(fs_info, opt) \ 3428 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3429 3430static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3431{ 3432 struct btrfs_super_block *disk_super; 3433 disk_super = fs_info->super_copy; 3434 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3435} 3436 3437#define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3438 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3439 #opt) 3440 3441static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3442 u64 flag, const char *name) 3443{ 3444 struct btrfs_super_block *disk_super; 3445 u64 features; 3446 3447 disk_super = fs_info->super_copy; 3448 features = btrfs_super_compat_ro_flags(disk_super); 3449 if (!(features & flag)) { 3450 spin_lock(&fs_info->super_lock); 3451 features = btrfs_super_compat_ro_flags(disk_super); 3452 if (!(features & flag)) { 3453 features |= flag; 3454 btrfs_set_super_compat_ro_flags(disk_super, features); 3455 btrfs_info(fs_info, 3456 "setting compat-ro feature flag for %s (0x%llx)", 3457 name, flag); 3458 } 3459 spin_unlock(&fs_info->super_lock); 3460 } 3461} 3462 3463#define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3464 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ 3465 #opt) 3466 3467static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3468 u64 flag, const char *name) 3469{ 3470 struct btrfs_super_block *disk_super; 3471 u64 features; 3472 3473 disk_super = fs_info->super_copy; 3474 features = btrfs_super_compat_ro_flags(disk_super); 3475 if (features & flag) { 3476 spin_lock(&fs_info->super_lock); 3477 features = btrfs_super_compat_ro_flags(disk_super); 3478 if (features & flag) { 3479 features &= ~flag; 3480 btrfs_set_super_compat_ro_flags(disk_super, features); 3481 btrfs_info(fs_info, 3482 "clearing compat-ro feature flag for %s (0x%llx)", 3483 name, flag); 3484 } 3485 spin_unlock(&fs_info->super_lock); 3486 } 3487} 3488 3489#define btrfs_fs_compat_ro(fs_info, opt) \ 3490 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3491 3492static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3493{ 3494 struct btrfs_super_block *disk_super; 3495 disk_super = fs_info->super_copy; 3496 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3497} 3498 3499/* acl.c */ 3500#ifdef CONFIG_BTRFS_FS_POSIX_ACL 3501struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3502int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3503int btrfs_init_acl(struct btrfs_trans_handle *trans, 3504 struct inode *inode, struct inode *dir); 3505#else 3506#define btrfs_get_acl NULL 3507#define btrfs_set_acl NULL 3508static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3509 struct inode *inode, struct inode *dir) 3510{ 3511 return 0; 3512} 3513#endif 3514 3515/* relocation.c */ 3516int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3517int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3518 struct btrfs_root *root); 3519int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3520 struct btrfs_root *root); 3521int btrfs_recover_relocation(struct btrfs_root *root); 3522int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len); 3523int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3524 struct btrfs_root *root, struct extent_buffer *buf, 3525 struct extent_buffer *cow); 3526void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3527 u64 *bytes_to_reserve); 3528int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3529 struct btrfs_pending_snapshot *pending); 3530int btrfs_should_cancel_balance(struct btrfs_fs_info *fs_info); 3531struct btrfs_root *find_reloc_root(struct btrfs_fs_info *fs_info, 3532 u64 bytenr); 3533int btrfs_should_ignore_reloc_root(struct btrfs_root *root); 3534 3535/* scrub.c */ 3536int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3537 u64 end, struct btrfs_scrub_progress *progress, 3538 int readonly, int is_dev_replace); 3539void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3540void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3541int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3542int btrfs_scrub_cancel_dev(struct btrfs_device *dev); 3543int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3544 struct btrfs_scrub_progress *progress); 3545static inline void btrfs_init_full_stripe_locks_tree( 3546 struct btrfs_full_stripe_locks_tree *locks_root) 3547{ 3548 locks_root->root = RB_ROOT; 3549 mutex_init(&locks_root->lock); 3550} 3551 3552/* dev-replace.c */ 3553void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3554void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3555void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3556 3557static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3558{ 3559 btrfs_bio_counter_sub(fs_info, 1); 3560} 3561 3562/* reada.c */ 3563struct reada_control { 3564 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3565 struct btrfs_key key_start; 3566 struct btrfs_key key_end; /* exclusive */ 3567 atomic_t elems; 3568 struct kref refcnt; 3569 wait_queue_head_t wait; 3570}; 3571struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3572 struct btrfs_key *start, struct btrfs_key *end); 3573int btrfs_reada_wait(void *handle); 3574void btrfs_reada_detach(void *handle); 3575int btree_readahead_hook(struct extent_buffer *eb, int err); 3576void btrfs_reada_remove_dev(struct btrfs_device *dev); 3577void btrfs_reada_undo_remove_dev(struct btrfs_device *dev); 3578 3579static inline int is_fstree(u64 rootid) 3580{ 3581 if (rootid == BTRFS_FS_TREE_OBJECTID || 3582 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3583 !btrfs_qgroup_level(rootid))) 3584 return 1; 3585 return 0; 3586} 3587 3588static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3589{ 3590 return signal_pending(current); 3591} 3592 3593#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) 3594 3595/* Sanity test specific functions */ 3596#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3597void btrfs_test_destroy_inode(struct inode *inode); 3598static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3599{ 3600 return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); 3601} 3602#else 3603static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3604{ 3605 return 0; 3606} 3607#endif 3608 3609#endif 3610