1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #ifndef __BTRFS_CTREE__ 20 #define __BTRFS_CTREE__ 21 22 #include <linux/mm.h> 23 #include <linux/sched/signal.h> 24 #include <linux/highmem.h> 25 #include <linux/fs.h> 26 #include <linux/rwsem.h> 27 #include <linux/semaphore.h> 28 #include <linux/completion.h> 29 #include <linux/backing-dev.h> 30 #include <linux/wait.h> 31 #include <linux/slab.h> 32 #include <linux/kobject.h> 33 #include <trace/events/btrfs.h> 34 #include <asm/kmap_types.h> 35 #include <linux/pagemap.h> 36 #include <linux/btrfs.h> 37 #include <linux/btrfs_tree.h> 38 #include <linux/workqueue.h> 39 #include <linux/security.h> 40 #include <linux/sizes.h> 41 #include <linux/dynamic_debug.h> 42 #include <linux/refcount.h> 43 #include "extent_io.h" 44 #include "extent_map.h" 45 #include "async-thread.h" 46 47 struct btrfs_trans_handle; 48 struct btrfs_transaction; 49 struct btrfs_pending_snapshot; 50 extern struct kmem_cache *btrfs_trans_handle_cachep; 51 extern struct kmem_cache *btrfs_bit_radix_cachep; 52 extern struct kmem_cache *btrfs_path_cachep; 53 extern struct kmem_cache *btrfs_free_space_cachep; 54 struct btrfs_ordered_sum; 55 56 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 57 #define STATIC noinline 58 #else 59 #define STATIC static noinline 60 #endif 61 62 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 63 64 #define BTRFS_MAX_MIRRORS 3 65 66 #define BTRFS_MAX_LEVEL 8 67 68 #define BTRFS_COMPAT_EXTENT_TREE_V0 69 70 /* 71 * the max metadata block size. This limit is somewhat artificial, 72 * but the memmove costs go through the roof for larger blocks. 73 */ 74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 75 76 /* 77 * we can actually store much bigger names, but lets not confuse the rest 78 * of linux 79 */ 80 #define BTRFS_NAME_LEN 255 81 82 /* 83 * Theoretical limit is larger, but we keep this down to a sane 84 * value. That should limit greatly the possibility of collisions on 85 * inode ref items. 86 */ 87 #define BTRFS_LINK_MAX 65535U 88 89 static const int btrfs_csum_sizes[] = { 4 }; 90 91 /* four bytes for CRC32 */ 92 #define BTRFS_EMPTY_DIR_SIZE 0 93 94 /* ioprio of readahead is set to idle */ 95 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 96 97 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 98 99 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 100 101 /* 102 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 103 */ 104 static inline u32 count_max_extents(u64 size) 105 { 106 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 107 } 108 109 struct btrfs_mapping_tree { 110 struct extent_map_tree map_tree; 111 }; 112 113 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 114 { 115 BUG_ON(num_stripes == 0); 116 return sizeof(struct btrfs_chunk) + 117 sizeof(struct btrfs_stripe) * (num_stripes - 1); 118 } 119 120 /* 121 * File system states 122 */ 123 #define BTRFS_FS_STATE_ERROR 0 124 #define BTRFS_FS_STATE_REMOUNTING 1 125 #define BTRFS_FS_STATE_TRANS_ABORTED 2 126 #define BTRFS_FS_STATE_DEV_REPLACING 3 127 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 128 129 #define BTRFS_BACKREF_REV_MAX 256 130 #define BTRFS_BACKREF_REV_SHIFT 56 131 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 132 BTRFS_BACKREF_REV_SHIFT) 133 134 #define BTRFS_OLD_BACKREF_REV 0 135 #define BTRFS_MIXED_BACKREF_REV 1 136 137 /* 138 * every tree block (leaf or node) starts with this header. 139 */ 140 struct btrfs_header { 141 /* these first four must match the super block */ 142 u8 csum[BTRFS_CSUM_SIZE]; 143 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 144 __le64 bytenr; /* which block this node is supposed to live in */ 145 __le64 flags; 146 147 /* allowed to be different from the super from here on down */ 148 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 149 __le64 generation; 150 __le64 owner; 151 __le32 nritems; 152 u8 level; 153 } __attribute__ ((__packed__)); 154 155 /* 156 * this is a very generous portion of the super block, giving us 157 * room to translate 14 chunks with 3 stripes each. 158 */ 159 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 160 161 /* 162 * just in case we somehow lose the roots and are not able to mount, 163 * we store an array of the roots from previous transactions 164 * in the super. 165 */ 166 #define BTRFS_NUM_BACKUP_ROOTS 4 167 struct btrfs_root_backup { 168 __le64 tree_root; 169 __le64 tree_root_gen; 170 171 __le64 chunk_root; 172 __le64 chunk_root_gen; 173 174 __le64 extent_root; 175 __le64 extent_root_gen; 176 177 __le64 fs_root; 178 __le64 fs_root_gen; 179 180 __le64 dev_root; 181 __le64 dev_root_gen; 182 183 __le64 csum_root; 184 __le64 csum_root_gen; 185 186 __le64 total_bytes; 187 __le64 bytes_used; 188 __le64 num_devices; 189 /* future */ 190 __le64 unused_64[4]; 191 192 u8 tree_root_level; 193 u8 chunk_root_level; 194 u8 extent_root_level; 195 u8 fs_root_level; 196 u8 dev_root_level; 197 u8 csum_root_level; 198 /* future and to align */ 199 u8 unused_8[10]; 200 } __attribute__ ((__packed__)); 201 202 /* 203 * the super block basically lists the main trees of the FS 204 * it currently lacks any block count etc etc 205 */ 206 struct btrfs_super_block { 207 u8 csum[BTRFS_CSUM_SIZE]; 208 /* the first 4 fields must match struct btrfs_header */ 209 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 210 __le64 bytenr; /* this block number */ 211 __le64 flags; 212 213 /* allowed to be different from the btrfs_header from here own down */ 214 __le64 magic; 215 __le64 generation; 216 __le64 root; 217 __le64 chunk_root; 218 __le64 log_root; 219 220 /* this will help find the new super based on the log root */ 221 __le64 log_root_transid; 222 __le64 total_bytes; 223 __le64 bytes_used; 224 __le64 root_dir_objectid; 225 __le64 num_devices; 226 __le32 sectorsize; 227 __le32 nodesize; 228 __le32 __unused_leafsize; 229 __le32 stripesize; 230 __le32 sys_chunk_array_size; 231 __le64 chunk_root_generation; 232 __le64 compat_flags; 233 __le64 compat_ro_flags; 234 __le64 incompat_flags; 235 __le16 csum_type; 236 u8 root_level; 237 u8 chunk_root_level; 238 u8 log_root_level; 239 struct btrfs_dev_item dev_item; 240 241 char label[BTRFS_LABEL_SIZE]; 242 243 __le64 cache_generation; 244 __le64 uuid_tree_generation; 245 246 /* future expansion */ 247 __le64 reserved[30]; 248 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 249 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 250 } __attribute__ ((__packed__)); 251 252 /* 253 * Compat flags that we support. If any incompat flags are set other than the 254 * ones specified below then we will fail to mount 255 */ 256 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 257 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 258 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 259 260 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 261 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 262 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 263 264 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 266 267 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 268 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 269 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 270 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 271 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 272 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 273 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 274 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 275 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 276 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 277 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 278 279 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 280 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 281 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 282 283 /* 284 * A leaf is full of items. offset and size tell us where to find 285 * the item in the leaf (relative to the start of the data area) 286 */ 287 struct btrfs_item { 288 struct btrfs_disk_key key; 289 __le32 offset; 290 __le32 size; 291 } __attribute__ ((__packed__)); 292 293 /* 294 * leaves have an item area and a data area: 295 * [item0, item1....itemN] [free space] [dataN...data1, data0] 296 * 297 * The data is separate from the items to get the keys closer together 298 * during searches. 299 */ 300 struct btrfs_leaf { 301 struct btrfs_header header; 302 struct btrfs_item items[]; 303 } __attribute__ ((__packed__)); 304 305 /* 306 * all non-leaf blocks are nodes, they hold only keys and pointers to 307 * other blocks 308 */ 309 struct btrfs_key_ptr { 310 struct btrfs_disk_key key; 311 __le64 blockptr; 312 __le64 generation; 313 } __attribute__ ((__packed__)); 314 315 struct btrfs_node { 316 struct btrfs_header header; 317 struct btrfs_key_ptr ptrs[]; 318 } __attribute__ ((__packed__)); 319 320 /* 321 * btrfs_paths remember the path taken from the root down to the leaf. 322 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 323 * to any other levels that are present. 324 * 325 * The slots array records the index of the item or block pointer 326 * used while walking the tree. 327 */ 328 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 329 struct btrfs_path { 330 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 331 int slots[BTRFS_MAX_LEVEL]; 332 /* if there is real range locking, this locks field will change */ 333 u8 locks[BTRFS_MAX_LEVEL]; 334 u8 reada; 335 /* keep some upper locks as we walk down */ 336 u8 lowest_level; 337 338 /* 339 * set by btrfs_split_item, tells search_slot to keep all locks 340 * and to force calls to keep space in the nodes 341 */ 342 unsigned int search_for_split:1; 343 unsigned int keep_locks:1; 344 unsigned int skip_locking:1; 345 unsigned int leave_spinning:1; 346 unsigned int search_commit_root:1; 347 unsigned int need_commit_sem:1; 348 unsigned int skip_release_on_error:1; 349 }; 350 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 351 sizeof(struct btrfs_item)) 352 struct btrfs_dev_replace { 353 u64 replace_state; /* see #define above */ 354 u64 time_started; /* seconds since 1-Jan-1970 */ 355 u64 time_stopped; /* seconds since 1-Jan-1970 */ 356 atomic64_t num_write_errors; 357 atomic64_t num_uncorrectable_read_errors; 358 359 u64 cursor_left; 360 u64 committed_cursor_left; 361 u64 cursor_left_last_write_of_item; 362 u64 cursor_right; 363 364 u64 cont_reading_from_srcdev_mode; /* see #define above */ 365 366 int is_valid; 367 int item_needs_writeback; 368 struct btrfs_device *srcdev; 369 struct btrfs_device *tgtdev; 370 371 pid_t lock_owner; 372 atomic_t nesting_level; 373 struct mutex lock_finishing_cancel_unmount; 374 rwlock_t lock; 375 atomic_t read_locks; 376 atomic_t blocking_readers; 377 wait_queue_head_t read_lock_wq; 378 379 struct btrfs_scrub_progress scrub_progress; 380 }; 381 382 /* For raid type sysfs entries */ 383 struct raid_kobject { 384 int raid_type; 385 struct kobject kobj; 386 }; 387 388 struct btrfs_space_info { 389 spinlock_t lock; 390 391 u64 total_bytes; /* total bytes in the space, 392 this doesn't take mirrors into account */ 393 u64 bytes_used; /* total bytes used, 394 this doesn't take mirrors into account */ 395 u64 bytes_pinned; /* total bytes pinned, will be freed when the 396 transaction finishes */ 397 u64 bytes_reserved; /* total bytes the allocator has reserved for 398 current allocations */ 399 u64 bytes_may_use; /* number of bytes that may be used for 400 delalloc/allocations */ 401 u64 bytes_readonly; /* total bytes that are read only */ 402 403 u64 max_extent_size; /* This will hold the maximum extent size of 404 the space info if we had an ENOSPC in the 405 allocator. */ 406 407 unsigned int full:1; /* indicates that we cannot allocate any more 408 chunks for this space */ 409 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 410 411 unsigned int flush:1; /* set if we are trying to make space */ 412 413 unsigned int force_alloc; /* set if we need to force a chunk 414 alloc for this space */ 415 416 u64 disk_used; /* total bytes used on disk */ 417 u64 disk_total; /* total bytes on disk, takes mirrors into 418 account */ 419 420 u64 flags; 421 422 /* 423 * bytes_pinned is kept in line with what is actually pinned, as in 424 * we've called update_block_group and dropped the bytes_used counter 425 * and increased the bytes_pinned counter. However this means that 426 * bytes_pinned does not reflect the bytes that will be pinned once the 427 * delayed refs are flushed, so this counter is inc'ed every time we 428 * call btrfs_free_extent so it is a realtime count of what will be 429 * freed once the transaction is committed. It will be zeroed every 430 * time the transaction commits. 431 */ 432 struct percpu_counter total_bytes_pinned; 433 434 struct list_head list; 435 /* Protected by the spinlock 'lock'. */ 436 struct list_head ro_bgs; 437 struct list_head priority_tickets; 438 struct list_head tickets; 439 /* 440 * tickets_id just indicates the next ticket will be handled, so note 441 * it's not stored per ticket. 442 */ 443 u64 tickets_id; 444 445 struct rw_semaphore groups_sem; 446 /* for block groups in our same type */ 447 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 448 wait_queue_head_t wait; 449 450 struct kobject kobj; 451 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 452 }; 453 454 #define BTRFS_BLOCK_RSV_GLOBAL 1 455 #define BTRFS_BLOCK_RSV_DELALLOC 2 456 #define BTRFS_BLOCK_RSV_TRANS 3 457 #define BTRFS_BLOCK_RSV_CHUNK 4 458 #define BTRFS_BLOCK_RSV_DELOPS 5 459 #define BTRFS_BLOCK_RSV_EMPTY 6 460 #define BTRFS_BLOCK_RSV_TEMP 7 461 462 struct btrfs_block_rsv { 463 u64 size; 464 u64 reserved; 465 struct btrfs_space_info *space_info; 466 spinlock_t lock; 467 unsigned short full; 468 unsigned short type; 469 unsigned short failfast; 470 }; 471 472 /* 473 * free clusters are used to claim free space in relatively large chunks, 474 * allowing us to do less seeky writes. They are used for all metadata 475 * allocations. In ssd_spread mode they are also used for data allocations. 476 */ 477 struct btrfs_free_cluster { 478 spinlock_t lock; 479 spinlock_t refill_lock; 480 struct rb_root root; 481 482 /* largest extent in this cluster */ 483 u64 max_size; 484 485 /* first extent starting offset */ 486 u64 window_start; 487 488 /* We did a full search and couldn't create a cluster */ 489 bool fragmented; 490 491 struct btrfs_block_group_cache *block_group; 492 /* 493 * when a cluster is allocated from a block group, we put the 494 * cluster onto a list in the block group so that it can 495 * be freed before the block group is freed. 496 */ 497 struct list_head block_group_list; 498 }; 499 500 enum btrfs_caching_type { 501 BTRFS_CACHE_NO = 0, 502 BTRFS_CACHE_STARTED = 1, 503 BTRFS_CACHE_FAST = 2, 504 BTRFS_CACHE_FINISHED = 3, 505 BTRFS_CACHE_ERROR = 4, 506 }; 507 508 enum btrfs_disk_cache_state { 509 BTRFS_DC_WRITTEN = 0, 510 BTRFS_DC_ERROR = 1, 511 BTRFS_DC_CLEAR = 2, 512 BTRFS_DC_SETUP = 3, 513 }; 514 515 struct btrfs_caching_control { 516 struct list_head list; 517 struct mutex mutex; 518 wait_queue_head_t wait; 519 struct btrfs_work work; 520 struct btrfs_block_group_cache *block_group; 521 u64 progress; 522 refcount_t count; 523 }; 524 525 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 526 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2) 527 528 struct btrfs_io_ctl { 529 void *cur, *orig; 530 struct page *page; 531 struct page **pages; 532 struct btrfs_fs_info *fs_info; 533 struct inode *inode; 534 unsigned long size; 535 int index; 536 int num_pages; 537 int entries; 538 int bitmaps; 539 unsigned check_crcs:1; 540 }; 541 542 /* 543 * Tree to record all locked full stripes of a RAID5/6 block group 544 */ 545 struct btrfs_full_stripe_locks_tree { 546 struct rb_root root; 547 struct mutex lock; 548 }; 549 550 struct btrfs_block_group_cache { 551 struct btrfs_key key; 552 struct btrfs_block_group_item item; 553 struct btrfs_fs_info *fs_info; 554 struct inode *inode; 555 spinlock_t lock; 556 u64 pinned; 557 u64 reserved; 558 u64 delalloc_bytes; 559 u64 bytes_super; 560 u64 flags; 561 u64 cache_generation; 562 563 /* 564 * If the free space extent count exceeds this number, convert the block 565 * group to bitmaps. 566 */ 567 u32 bitmap_high_thresh; 568 569 /* 570 * If the free space extent count drops below this number, convert the 571 * block group back to extents. 572 */ 573 u32 bitmap_low_thresh; 574 575 /* 576 * It is just used for the delayed data space allocation because 577 * only the data space allocation and the relative metadata update 578 * can be done cross the transaction. 579 */ 580 struct rw_semaphore data_rwsem; 581 582 /* for raid56, this is a full stripe, without parity */ 583 unsigned long full_stripe_len; 584 585 unsigned int ro; 586 unsigned int iref:1; 587 unsigned int has_caching_ctl:1; 588 unsigned int removed:1; 589 590 int disk_cache_state; 591 592 /* cache tracking stuff */ 593 int cached; 594 struct btrfs_caching_control *caching_ctl; 595 u64 last_byte_to_unpin; 596 597 struct btrfs_space_info *space_info; 598 599 /* free space cache stuff */ 600 struct btrfs_free_space_ctl *free_space_ctl; 601 602 /* block group cache stuff */ 603 struct rb_node cache_node; 604 605 /* for block groups in the same raid type */ 606 struct list_head list; 607 608 /* usage count */ 609 atomic_t count; 610 611 /* List of struct btrfs_free_clusters for this block group. 612 * Today it will only have one thing on it, but that may change 613 */ 614 struct list_head cluster_list; 615 616 /* For delayed block group creation or deletion of empty block groups */ 617 struct list_head bg_list; 618 619 /* For read-only block groups */ 620 struct list_head ro_list; 621 622 atomic_t trimming; 623 624 /* For dirty block groups */ 625 struct list_head dirty_list; 626 struct list_head io_list; 627 628 struct btrfs_io_ctl io_ctl; 629 630 /* 631 * Incremented when doing extent allocations and holding a read lock 632 * on the space_info's groups_sem semaphore. 633 * Decremented when an ordered extent that represents an IO against this 634 * block group's range is created (after it's added to its inode's 635 * root's list of ordered extents) or immediately after the allocation 636 * if it's a metadata extent or fallocate extent (for these cases we 637 * don't create ordered extents). 638 */ 639 atomic_t reservations; 640 641 /* 642 * Incremented while holding the spinlock *lock* by a task checking if 643 * it can perform a nocow write (incremented if the value for the *ro* 644 * field is 0). Decremented by such tasks once they create an ordered 645 * extent or before that if some error happens before reaching that step. 646 * This is to prevent races between block group relocation and nocow 647 * writes through direct IO. 648 */ 649 atomic_t nocow_writers; 650 651 /* Lock for free space tree operations. */ 652 struct mutex free_space_lock; 653 654 /* 655 * Does the block group need to be added to the free space tree? 656 * Protected by free_space_lock. 657 */ 658 int needs_free_space; 659 660 /* Record locked full stripes for RAID5/6 block group */ 661 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 662 }; 663 664 /* delayed seq elem */ 665 struct seq_list { 666 struct list_head list; 667 u64 seq; 668 }; 669 670 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 671 672 #define SEQ_LAST ((u64)-1) 673 674 enum btrfs_orphan_cleanup_state { 675 ORPHAN_CLEANUP_STARTED = 1, 676 ORPHAN_CLEANUP_DONE = 2, 677 }; 678 679 /* used by the raid56 code to lock stripes for read/modify/write */ 680 struct btrfs_stripe_hash { 681 struct list_head hash_list; 682 wait_queue_head_t wait; 683 spinlock_t lock; 684 }; 685 686 /* used by the raid56 code to lock stripes for read/modify/write */ 687 struct btrfs_stripe_hash_table { 688 struct list_head stripe_cache; 689 spinlock_t cache_lock; 690 int cache_size; 691 struct btrfs_stripe_hash table[]; 692 }; 693 694 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 695 696 void btrfs_init_async_reclaim_work(struct work_struct *work); 697 698 /* fs_info */ 699 struct reloc_control; 700 struct btrfs_device; 701 struct btrfs_fs_devices; 702 struct btrfs_balance_control; 703 struct btrfs_delayed_root; 704 705 #define BTRFS_FS_BARRIER 1 706 #define BTRFS_FS_CLOSING_START 2 707 #define BTRFS_FS_CLOSING_DONE 3 708 #define BTRFS_FS_LOG_RECOVERING 4 709 #define BTRFS_FS_OPEN 5 710 #define BTRFS_FS_QUOTA_ENABLED 6 711 #define BTRFS_FS_QUOTA_ENABLING 7 712 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 713 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 714 #define BTRFS_FS_BTREE_ERR 11 715 #define BTRFS_FS_LOG1_ERR 12 716 #define BTRFS_FS_LOG2_ERR 13 717 #define BTRFS_FS_QUOTA_OVERRIDE 14 718 /* Used to record internally whether fs has been frozen */ 719 #define BTRFS_FS_FROZEN 15 720 721 /* 722 * Indicate that a whole-filesystem exclusive operation is running 723 * (device replace, resize, device add/delete, balance) 724 */ 725 #define BTRFS_FS_EXCL_OP 16 726 727 struct btrfs_fs_info { 728 u8 fsid[BTRFS_FSID_SIZE]; 729 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 730 unsigned long flags; 731 struct btrfs_root *extent_root; 732 struct btrfs_root *tree_root; 733 struct btrfs_root *chunk_root; 734 struct btrfs_root *dev_root; 735 struct btrfs_root *fs_root; 736 struct btrfs_root *csum_root; 737 struct btrfs_root *quota_root; 738 struct btrfs_root *uuid_root; 739 struct btrfs_root *free_space_root; 740 741 /* the log root tree is a directory of all the other log roots */ 742 struct btrfs_root *log_root_tree; 743 744 spinlock_t fs_roots_radix_lock; 745 struct radix_tree_root fs_roots_radix; 746 747 /* block group cache stuff */ 748 spinlock_t block_group_cache_lock; 749 u64 first_logical_byte; 750 struct rb_root block_group_cache_tree; 751 752 /* keep track of unallocated space */ 753 atomic64_t free_chunk_space; 754 755 struct extent_io_tree freed_extents[2]; 756 struct extent_io_tree *pinned_extents; 757 758 /* logical->physical extent mapping */ 759 struct btrfs_mapping_tree mapping_tree; 760 761 /* 762 * block reservation for extent, checksum, root tree and 763 * delayed dir index item 764 */ 765 struct btrfs_block_rsv global_block_rsv; 766 /* block reservation for delay allocation */ 767 struct btrfs_block_rsv delalloc_block_rsv; 768 /* block reservation for metadata operations */ 769 struct btrfs_block_rsv trans_block_rsv; 770 /* block reservation for chunk tree */ 771 struct btrfs_block_rsv chunk_block_rsv; 772 /* block reservation for delayed operations */ 773 struct btrfs_block_rsv delayed_block_rsv; 774 775 struct btrfs_block_rsv empty_block_rsv; 776 777 u64 generation; 778 u64 last_trans_committed; 779 u64 avg_delayed_ref_runtime; 780 781 /* 782 * this is updated to the current trans every time a full commit 783 * is required instead of the faster short fsync log commits 784 */ 785 u64 last_trans_log_full_commit; 786 unsigned long mount_opt; 787 /* 788 * Track requests for actions that need to be done during transaction 789 * commit (like for some mount options). 790 */ 791 unsigned long pending_changes; 792 unsigned long compress_type:4; 793 int commit_interval; 794 /* 795 * It is a suggestive number, the read side is safe even it gets a 796 * wrong number because we will write out the data into a regular 797 * extent. The write side(mount/remount) is under ->s_umount lock, 798 * so it is also safe. 799 */ 800 u64 max_inline; 801 802 struct btrfs_transaction *running_transaction; 803 wait_queue_head_t transaction_throttle; 804 wait_queue_head_t transaction_wait; 805 wait_queue_head_t transaction_blocked_wait; 806 wait_queue_head_t async_submit_wait; 807 808 /* 809 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 810 * when they are updated. 811 * 812 * Because we do not clear the flags for ever, so we needn't use 813 * the lock on the read side. 814 * 815 * We also needn't use the lock when we mount the fs, because 816 * there is no other task which will update the flag. 817 */ 818 spinlock_t super_lock; 819 struct btrfs_super_block *super_copy; 820 struct btrfs_super_block *super_for_commit; 821 struct super_block *sb; 822 struct inode *btree_inode; 823 struct mutex tree_log_mutex; 824 struct mutex transaction_kthread_mutex; 825 struct mutex cleaner_mutex; 826 struct mutex chunk_mutex; 827 struct mutex volume_mutex; 828 829 /* 830 * this is taken to make sure we don't set block groups ro after 831 * the free space cache has been allocated on them 832 */ 833 struct mutex ro_block_group_mutex; 834 835 /* this is used during read/modify/write to make sure 836 * no two ios are trying to mod the same stripe at the same 837 * time 838 */ 839 struct btrfs_stripe_hash_table *stripe_hash_table; 840 841 /* 842 * this protects the ordered operations list only while we are 843 * processing all of the entries on it. This way we make 844 * sure the commit code doesn't find the list temporarily empty 845 * because another function happens to be doing non-waiting preflush 846 * before jumping into the main commit. 847 */ 848 struct mutex ordered_operations_mutex; 849 850 struct rw_semaphore commit_root_sem; 851 852 struct rw_semaphore cleanup_work_sem; 853 854 struct rw_semaphore subvol_sem; 855 struct srcu_struct subvol_srcu; 856 857 spinlock_t trans_lock; 858 /* 859 * the reloc mutex goes with the trans lock, it is taken 860 * during commit to protect us from the relocation code 861 */ 862 struct mutex reloc_mutex; 863 864 struct list_head trans_list; 865 struct list_head dead_roots; 866 struct list_head caching_block_groups; 867 868 spinlock_t delayed_iput_lock; 869 struct list_head delayed_iputs; 870 struct mutex cleaner_delayed_iput_mutex; 871 872 /* this protects tree_mod_seq_list */ 873 spinlock_t tree_mod_seq_lock; 874 atomic64_t tree_mod_seq; 875 struct list_head tree_mod_seq_list; 876 877 /* this protects tree_mod_log */ 878 rwlock_t tree_mod_log_lock; 879 struct rb_root tree_mod_log; 880 881 atomic_t nr_async_submits; 882 atomic_t async_submit_draining; 883 atomic_t nr_async_bios; 884 atomic_t async_delalloc_pages; 885 atomic_t open_ioctl_trans; 886 887 /* 888 * this is used to protect the following list -- ordered_roots. 889 */ 890 spinlock_t ordered_root_lock; 891 892 /* 893 * all fs/file tree roots in which there are data=ordered extents 894 * pending writeback are added into this list. 895 * 896 * these can span multiple transactions and basically include 897 * every dirty data page that isn't from nodatacow 898 */ 899 struct list_head ordered_roots; 900 901 struct mutex delalloc_root_mutex; 902 spinlock_t delalloc_root_lock; 903 /* all fs/file tree roots that have delalloc inodes. */ 904 struct list_head delalloc_roots; 905 906 /* 907 * there is a pool of worker threads for checksumming during writes 908 * and a pool for checksumming after reads. This is because readers 909 * can run with FS locks held, and the writers may be waiting for 910 * those locks. We don't want ordering in the pending list to cause 911 * deadlocks, and so the two are serviced separately. 912 * 913 * A third pool does submit_bio to avoid deadlocking with the other 914 * two 915 */ 916 struct btrfs_workqueue *workers; 917 struct btrfs_workqueue *delalloc_workers; 918 struct btrfs_workqueue *flush_workers; 919 struct btrfs_workqueue *endio_workers; 920 struct btrfs_workqueue *endio_meta_workers; 921 struct btrfs_workqueue *endio_raid56_workers; 922 struct btrfs_workqueue *endio_repair_workers; 923 struct btrfs_workqueue *rmw_workers; 924 struct btrfs_workqueue *endio_meta_write_workers; 925 struct btrfs_workqueue *endio_write_workers; 926 struct btrfs_workqueue *endio_freespace_worker; 927 struct btrfs_workqueue *submit_workers; 928 struct btrfs_workqueue *caching_workers; 929 struct btrfs_workqueue *readahead_workers; 930 931 /* 932 * fixup workers take dirty pages that didn't properly go through 933 * the cow mechanism and make them safe to write. It happens 934 * for the sys_munmap function call path 935 */ 936 struct btrfs_workqueue *fixup_workers; 937 struct btrfs_workqueue *delayed_workers; 938 939 /* the extent workers do delayed refs on the extent allocation tree */ 940 struct btrfs_workqueue *extent_workers; 941 struct task_struct *transaction_kthread; 942 struct task_struct *cleaner_kthread; 943 int thread_pool_size; 944 945 struct kobject *space_info_kobj; 946 947 u64 total_pinned; 948 949 /* used to keep from writing metadata until there is a nice batch */ 950 struct percpu_counter dirty_metadata_bytes; 951 struct percpu_counter delalloc_bytes; 952 s32 dirty_metadata_batch; 953 s32 delalloc_batch; 954 955 struct list_head dirty_cowonly_roots; 956 957 struct btrfs_fs_devices *fs_devices; 958 959 /* 960 * the space_info list is almost entirely read only. It only changes 961 * when we add a new raid type to the FS, and that happens 962 * very rarely. RCU is used to protect it. 963 */ 964 struct list_head space_info; 965 966 struct btrfs_space_info *data_sinfo; 967 968 struct reloc_control *reloc_ctl; 969 970 /* data_alloc_cluster is only used in ssd_spread mode */ 971 struct btrfs_free_cluster data_alloc_cluster; 972 973 /* all metadata allocations go through this cluster */ 974 struct btrfs_free_cluster meta_alloc_cluster; 975 976 /* auto defrag inodes go here */ 977 spinlock_t defrag_inodes_lock; 978 struct rb_root defrag_inodes; 979 atomic_t defrag_running; 980 981 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 982 seqlock_t profiles_lock; 983 /* 984 * these three are in extended format (availability of single 985 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 986 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 987 */ 988 u64 avail_data_alloc_bits; 989 u64 avail_metadata_alloc_bits; 990 u64 avail_system_alloc_bits; 991 992 /* restriper state */ 993 spinlock_t balance_lock; 994 struct mutex balance_mutex; 995 atomic_t balance_running; 996 atomic_t balance_pause_req; 997 atomic_t balance_cancel_req; 998 struct btrfs_balance_control *balance_ctl; 999 wait_queue_head_t balance_wait_q; 1000 1001 unsigned data_chunk_allocations; 1002 unsigned metadata_ratio; 1003 1004 void *bdev_holder; 1005 1006 /* private scrub information */ 1007 struct mutex scrub_lock; 1008 atomic_t scrubs_running; 1009 atomic_t scrub_pause_req; 1010 atomic_t scrubs_paused; 1011 atomic_t scrub_cancel_req; 1012 wait_queue_head_t scrub_pause_wait; 1013 int scrub_workers_refcnt; 1014 struct btrfs_workqueue *scrub_workers; 1015 struct btrfs_workqueue *scrub_wr_completion_workers; 1016 struct btrfs_workqueue *scrub_nocow_workers; 1017 struct btrfs_workqueue *scrub_parity_workers; 1018 1019 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1020 u32 check_integrity_print_mask; 1021 #endif 1022 /* is qgroup tracking in a consistent state? */ 1023 u64 qgroup_flags; 1024 1025 /* holds configuration and tracking. Protected by qgroup_lock */ 1026 struct rb_root qgroup_tree; 1027 struct rb_root qgroup_op_tree; 1028 spinlock_t qgroup_lock; 1029 spinlock_t qgroup_op_lock; 1030 atomic_t qgroup_op_seq; 1031 1032 /* 1033 * used to avoid frequently calling ulist_alloc()/ulist_free() 1034 * when doing qgroup accounting, it must be protected by qgroup_lock. 1035 */ 1036 struct ulist *qgroup_ulist; 1037 1038 /* protect user change for quota operations */ 1039 struct mutex qgroup_ioctl_lock; 1040 1041 /* list of dirty qgroups to be written at next commit */ 1042 struct list_head dirty_qgroups; 1043 1044 /* used by qgroup for an efficient tree traversal */ 1045 u64 qgroup_seq; 1046 1047 /* qgroup rescan items */ 1048 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1049 struct btrfs_key qgroup_rescan_progress; 1050 struct btrfs_workqueue *qgroup_rescan_workers; 1051 struct completion qgroup_rescan_completion; 1052 struct btrfs_work qgroup_rescan_work; 1053 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1054 1055 /* filesystem state */ 1056 unsigned long fs_state; 1057 1058 struct btrfs_delayed_root *delayed_root; 1059 1060 /* readahead tree */ 1061 spinlock_t reada_lock; 1062 struct radix_tree_root reada_tree; 1063 1064 /* readahead works cnt */ 1065 atomic_t reada_works_cnt; 1066 1067 /* Extent buffer radix tree */ 1068 spinlock_t buffer_lock; 1069 struct radix_tree_root buffer_radix; 1070 1071 /* next backup root to be overwritten */ 1072 int backup_root_index; 1073 1074 /* device replace state */ 1075 struct btrfs_dev_replace dev_replace; 1076 1077 struct percpu_counter bio_counter; 1078 wait_queue_head_t replace_wait; 1079 1080 struct semaphore uuid_tree_rescan_sem; 1081 1082 /* Used to reclaim the metadata space in the background. */ 1083 struct work_struct async_reclaim_work; 1084 1085 spinlock_t unused_bgs_lock; 1086 struct list_head unused_bgs; 1087 struct mutex unused_bg_unpin_mutex; 1088 struct mutex delete_unused_bgs_mutex; 1089 1090 /* For btrfs to record security options */ 1091 struct security_mnt_opts security_opts; 1092 1093 /* 1094 * Chunks that can't be freed yet (under a trim/discard operation) 1095 * and will be latter freed. Protected by fs_info->chunk_mutex. 1096 */ 1097 struct list_head pinned_chunks; 1098 1099 /* Cached block sizes */ 1100 u32 nodesize; 1101 u32 sectorsize; 1102 u32 stripesize; 1103 }; 1104 1105 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1106 { 1107 return sb->s_fs_info; 1108 } 1109 1110 struct btrfs_subvolume_writers { 1111 struct percpu_counter counter; 1112 wait_queue_head_t wait; 1113 }; 1114 1115 /* 1116 * The state of btrfs root 1117 */ 1118 /* 1119 * btrfs_record_root_in_trans is a multi-step process, 1120 * and it can race with the balancing code. But the 1121 * race is very small, and only the first time the root 1122 * is added to each transaction. So IN_TRANS_SETUP 1123 * is used to tell us when more checks are required 1124 */ 1125 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1126 #define BTRFS_ROOT_REF_COWS 1 1127 #define BTRFS_ROOT_TRACK_DIRTY 2 1128 #define BTRFS_ROOT_IN_RADIX 3 1129 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1130 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1131 #define BTRFS_ROOT_FORCE_COW 6 1132 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1133 #define BTRFS_ROOT_DIRTY 8 1134 1135 /* 1136 * in ram representation of the tree. extent_root is used for all allocations 1137 * and for the extent tree extent_root root. 1138 */ 1139 struct btrfs_root { 1140 struct extent_buffer *node; 1141 1142 struct extent_buffer *commit_root; 1143 struct btrfs_root *log_root; 1144 struct btrfs_root *reloc_root; 1145 1146 unsigned long state; 1147 struct btrfs_root_item root_item; 1148 struct btrfs_key root_key; 1149 struct btrfs_fs_info *fs_info; 1150 struct extent_io_tree dirty_log_pages; 1151 1152 struct mutex objectid_mutex; 1153 1154 spinlock_t accounting_lock; 1155 struct btrfs_block_rsv *block_rsv; 1156 1157 /* free ino cache stuff */ 1158 struct btrfs_free_space_ctl *free_ino_ctl; 1159 enum btrfs_caching_type ino_cache_state; 1160 spinlock_t ino_cache_lock; 1161 wait_queue_head_t ino_cache_wait; 1162 struct btrfs_free_space_ctl *free_ino_pinned; 1163 u64 ino_cache_progress; 1164 struct inode *ino_cache_inode; 1165 1166 struct mutex log_mutex; 1167 wait_queue_head_t log_writer_wait; 1168 wait_queue_head_t log_commit_wait[2]; 1169 struct list_head log_ctxs[2]; 1170 atomic_t log_writers; 1171 atomic_t log_commit[2]; 1172 atomic_t log_batch; 1173 int log_transid; 1174 /* No matter the commit succeeds or not*/ 1175 int log_transid_committed; 1176 /* Just be updated when the commit succeeds. */ 1177 int last_log_commit; 1178 pid_t log_start_pid; 1179 1180 u64 objectid; 1181 u64 last_trans; 1182 1183 u32 type; 1184 1185 u64 highest_objectid; 1186 1187 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1188 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1189 u64 alloc_bytenr; 1190 #endif 1191 1192 u64 defrag_trans_start; 1193 struct btrfs_key defrag_progress; 1194 struct btrfs_key defrag_max; 1195 char *name; 1196 1197 /* the dirty list is only used by non-reference counted roots */ 1198 struct list_head dirty_list; 1199 1200 struct list_head root_list; 1201 1202 spinlock_t log_extents_lock[2]; 1203 struct list_head logged_list[2]; 1204 1205 spinlock_t orphan_lock; 1206 atomic_t orphan_inodes; 1207 struct btrfs_block_rsv *orphan_block_rsv; 1208 int orphan_cleanup_state; 1209 1210 spinlock_t inode_lock; 1211 /* red-black tree that keeps track of in-memory inodes */ 1212 struct rb_root inode_tree; 1213 1214 /* 1215 * radix tree that keeps track of delayed nodes of every inode, 1216 * protected by inode_lock 1217 */ 1218 struct radix_tree_root delayed_nodes_tree; 1219 /* 1220 * right now this just gets used so that a root has its own devid 1221 * for stat. It may be used for more later 1222 */ 1223 dev_t anon_dev; 1224 1225 spinlock_t root_item_lock; 1226 refcount_t refs; 1227 1228 struct mutex delalloc_mutex; 1229 spinlock_t delalloc_lock; 1230 /* 1231 * all of the inodes that have delalloc bytes. It is possible for 1232 * this list to be empty even when there is still dirty data=ordered 1233 * extents waiting to finish IO. 1234 */ 1235 struct list_head delalloc_inodes; 1236 struct list_head delalloc_root; 1237 u64 nr_delalloc_inodes; 1238 1239 struct mutex ordered_extent_mutex; 1240 /* 1241 * this is used by the balancing code to wait for all the pending 1242 * ordered extents 1243 */ 1244 spinlock_t ordered_extent_lock; 1245 1246 /* 1247 * all of the data=ordered extents pending writeback 1248 * these can span multiple transactions and basically include 1249 * every dirty data page that isn't from nodatacow 1250 */ 1251 struct list_head ordered_extents; 1252 struct list_head ordered_root; 1253 u64 nr_ordered_extents; 1254 1255 /* 1256 * Number of currently running SEND ioctls to prevent 1257 * manipulation with the read-only status via SUBVOL_SETFLAGS 1258 */ 1259 int send_in_progress; 1260 struct btrfs_subvolume_writers *subv_writers; 1261 atomic_t will_be_snapshotted; 1262 1263 /* For qgroup metadata space reserve */ 1264 atomic64_t qgroup_meta_rsv; 1265 }; 1266 1267 struct btrfs_file_private { 1268 struct btrfs_trans_handle *trans; 1269 void *filldir_buf; 1270 }; 1271 1272 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1273 { 1274 return btrfs_sb(inode->i_sb)->sectorsize; 1275 } 1276 1277 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1278 { 1279 1280 return info->nodesize - sizeof(struct btrfs_header); 1281 } 1282 1283 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1284 1285 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1286 { 1287 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1288 } 1289 1290 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1291 { 1292 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1293 } 1294 1295 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1296 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1297 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1298 { 1299 return BTRFS_MAX_ITEM_SIZE(info) - 1300 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1301 } 1302 1303 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1304 { 1305 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1306 } 1307 1308 /* 1309 * Flags for mount options. 1310 * 1311 * Note: don't forget to add new options to btrfs_show_options() 1312 */ 1313 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1314 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1315 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1316 #define BTRFS_MOUNT_SSD (1 << 3) 1317 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1318 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1319 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1320 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1321 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1322 #define BTRFS_MOUNT_NOSSD (1 << 9) 1323 #define BTRFS_MOUNT_DISCARD (1 << 10) 1324 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1325 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1326 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1327 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1328 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1329 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1330 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1331 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1332 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1333 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1334 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1335 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1336 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1337 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1338 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1339 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1340 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1341 1342 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1343 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1344 1345 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1346 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1347 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1348 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1349 BTRFS_MOUNT_##opt) 1350 1351 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1352 { \ 1353 if (!btrfs_test_opt(fs_info, opt)) \ 1354 btrfs_info(fs_info, fmt, ##args); \ 1355 btrfs_set_opt(fs_info->mount_opt, opt); \ 1356 } 1357 1358 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1359 { \ 1360 if (btrfs_test_opt(fs_info, opt)) \ 1361 btrfs_info(fs_info, fmt, ##args); \ 1362 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1363 } 1364 1365 #ifdef CONFIG_BTRFS_DEBUG 1366 static inline int 1367 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1368 { 1369 struct btrfs_fs_info *fs_info = block_group->fs_info; 1370 1371 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1372 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1373 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1374 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1375 } 1376 #endif 1377 1378 /* 1379 * Requests for changes that need to be done during transaction commit. 1380 * 1381 * Internal mount options that are used for special handling of the real 1382 * mount options (eg. cannot be set during remount and have to be set during 1383 * transaction commit) 1384 */ 1385 1386 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1387 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1388 #define BTRFS_PENDING_COMMIT (2) 1389 1390 #define btrfs_test_pending(info, opt) \ 1391 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1392 #define btrfs_set_pending(info, opt) \ 1393 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1394 #define btrfs_clear_pending(info, opt) \ 1395 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1396 1397 /* 1398 * Helpers for setting pending mount option changes. 1399 * 1400 * Expects corresponding macros 1401 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1402 */ 1403 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1404 do { \ 1405 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1406 btrfs_info((info), fmt, ##args); \ 1407 btrfs_set_pending((info), SET_##opt); \ 1408 btrfs_clear_pending((info), CLEAR_##opt); \ 1409 } \ 1410 } while(0) 1411 1412 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1413 do { \ 1414 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1415 btrfs_info((info), fmt, ##args); \ 1416 btrfs_set_pending((info), CLEAR_##opt); \ 1417 btrfs_clear_pending((info), SET_##opt); \ 1418 } \ 1419 } while(0) 1420 1421 /* 1422 * Inode flags 1423 */ 1424 #define BTRFS_INODE_NODATASUM (1 << 0) 1425 #define BTRFS_INODE_NODATACOW (1 << 1) 1426 #define BTRFS_INODE_READONLY (1 << 2) 1427 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1428 #define BTRFS_INODE_PREALLOC (1 << 4) 1429 #define BTRFS_INODE_SYNC (1 << 5) 1430 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1431 #define BTRFS_INODE_APPEND (1 << 7) 1432 #define BTRFS_INODE_NODUMP (1 << 8) 1433 #define BTRFS_INODE_NOATIME (1 << 9) 1434 #define BTRFS_INODE_DIRSYNC (1 << 10) 1435 #define BTRFS_INODE_COMPRESS (1 << 11) 1436 1437 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1438 1439 struct btrfs_map_token { 1440 const struct extent_buffer *eb; 1441 char *kaddr; 1442 unsigned long offset; 1443 }; 1444 1445 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1446 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1447 1448 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1449 { 1450 token->kaddr = NULL; 1451 } 1452 1453 /* some macros to generate set/get functions for the struct fields. This 1454 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1455 * one for u8: 1456 */ 1457 #define le8_to_cpu(v) (v) 1458 #define cpu_to_le8(v) (v) 1459 #define __le8 u8 1460 1461 #define read_eb_member(eb, ptr, type, member, result) (\ 1462 read_extent_buffer(eb, (char *)(result), \ 1463 ((unsigned long)(ptr)) + \ 1464 offsetof(type, member), \ 1465 sizeof(((type *)0)->member))) 1466 1467 #define write_eb_member(eb, ptr, type, member, result) (\ 1468 write_extent_buffer(eb, (char *)(result), \ 1469 ((unsigned long)(ptr)) + \ 1470 offsetof(type, member), \ 1471 sizeof(((type *)0)->member))) 1472 1473 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1474 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1475 const void *ptr, unsigned long off, \ 1476 struct btrfs_map_token *token); \ 1477 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1478 unsigned long off, u##bits val, \ 1479 struct btrfs_map_token *token); \ 1480 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1481 const void *ptr, \ 1482 unsigned long off) \ 1483 { \ 1484 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1485 } \ 1486 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1487 unsigned long off, u##bits val) \ 1488 { \ 1489 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1490 } 1491 1492 DECLARE_BTRFS_SETGET_BITS(8) 1493 DECLARE_BTRFS_SETGET_BITS(16) 1494 DECLARE_BTRFS_SETGET_BITS(32) 1495 DECLARE_BTRFS_SETGET_BITS(64) 1496 1497 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1498 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1499 const type *s) \ 1500 { \ 1501 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1502 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1503 } \ 1504 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1505 u##bits val) \ 1506 { \ 1507 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1508 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1509 } \ 1510 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1511 const type *s, \ 1512 struct btrfs_map_token *token) \ 1513 { \ 1514 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1515 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1516 } \ 1517 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1518 type *s, u##bits val, \ 1519 struct btrfs_map_token *token) \ 1520 { \ 1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1522 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1523 } 1524 1525 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1526 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1527 { \ 1528 const type *p = page_address(eb->pages[0]); \ 1529 u##bits res = le##bits##_to_cpu(p->member); \ 1530 return res; \ 1531 } \ 1532 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1533 u##bits val) \ 1534 { \ 1535 type *p = page_address(eb->pages[0]); \ 1536 p->member = cpu_to_le##bits(val); \ 1537 } 1538 1539 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1540 static inline u##bits btrfs_##name(const type *s) \ 1541 { \ 1542 return le##bits##_to_cpu(s->member); \ 1543 } \ 1544 static inline void btrfs_set_##name(type *s, u##bits val) \ 1545 { \ 1546 s->member = cpu_to_le##bits(val); \ 1547 } 1548 1549 1550 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1551 struct btrfs_dev_item *s) 1552 { 1553 BUILD_BUG_ON(sizeof(u64) != 1554 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1555 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1556 total_bytes)); 1557 } 1558 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1559 struct btrfs_dev_item *s, 1560 u64 val) 1561 { 1562 BUILD_BUG_ON(sizeof(u64) != 1563 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1564 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1565 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1566 } 1567 1568 1569 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1570 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1571 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1572 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1573 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1574 start_offset, 64); 1575 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1576 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1577 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1578 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1579 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1580 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1581 1582 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1583 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1584 total_bytes, 64); 1585 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1586 bytes_used, 64); 1587 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1588 io_align, 32); 1589 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1590 io_width, 32); 1591 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1592 sector_size, 32); 1593 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1594 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1595 dev_group, 32); 1596 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1597 seek_speed, 8); 1598 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1599 bandwidth, 8); 1600 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1601 generation, 64); 1602 1603 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1604 { 1605 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1606 } 1607 1608 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1609 { 1610 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1611 } 1612 1613 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1614 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1615 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1616 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1617 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1618 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1619 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1620 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1621 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1622 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1623 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1624 1625 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1626 { 1627 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1628 } 1629 1630 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1632 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1633 stripe_len, 64); 1634 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1635 io_align, 32); 1636 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1637 io_width, 32); 1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1639 sector_size, 32); 1640 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1641 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1642 num_stripes, 16); 1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1644 sub_stripes, 16); 1645 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1646 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1647 1648 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1649 int nr) 1650 { 1651 unsigned long offset = (unsigned long)c; 1652 offset += offsetof(struct btrfs_chunk, stripe); 1653 offset += nr * sizeof(struct btrfs_stripe); 1654 return (struct btrfs_stripe *)offset; 1655 } 1656 1657 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1658 { 1659 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1660 } 1661 1662 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1663 struct btrfs_chunk *c, int nr) 1664 { 1665 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1666 } 1667 1668 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1669 struct btrfs_chunk *c, int nr) 1670 { 1671 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1672 } 1673 1674 /* struct btrfs_block_group_item */ 1675 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1676 used, 64); 1677 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1678 used, 64); 1679 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1680 struct btrfs_block_group_item, chunk_objectid, 64); 1681 1682 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1683 struct btrfs_block_group_item, chunk_objectid, 64); 1684 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1685 struct btrfs_block_group_item, flags, 64); 1686 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1687 struct btrfs_block_group_item, flags, 64); 1688 1689 /* struct btrfs_free_space_info */ 1690 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1691 extent_count, 32); 1692 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1693 1694 /* struct btrfs_inode_ref */ 1695 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1696 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1697 1698 /* struct btrfs_inode_extref */ 1699 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1700 parent_objectid, 64); 1701 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1702 name_len, 16); 1703 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1704 1705 /* struct btrfs_inode_item */ 1706 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1707 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1708 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1709 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1710 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1711 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1712 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1713 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1714 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1715 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1716 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1717 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1718 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1719 generation, 64); 1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1721 sequence, 64); 1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1723 transid, 64); 1724 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1726 nbytes, 64); 1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1728 block_group, 64); 1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1730 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1735 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1736 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1737 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1738 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1739 1740 /* struct btrfs_dev_extent */ 1741 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1742 chunk_tree, 64); 1743 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1744 chunk_objectid, 64); 1745 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1746 chunk_offset, 64); 1747 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1748 1749 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1750 { 1751 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1752 return (unsigned long)dev + ptr; 1753 } 1754 1755 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1756 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1757 generation, 64); 1758 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1759 1760 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1761 1762 1763 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1764 1765 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1766 struct btrfs_tree_block_info *item, 1767 struct btrfs_disk_key *key) 1768 { 1769 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1770 } 1771 1772 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1773 struct btrfs_tree_block_info *item, 1774 struct btrfs_disk_key *key) 1775 { 1776 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1777 } 1778 1779 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1780 root, 64); 1781 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1782 objectid, 64); 1783 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1784 offset, 64); 1785 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1786 count, 32); 1787 1788 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1789 count, 32); 1790 1791 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1792 type, 8); 1793 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1794 offset, 64); 1795 1796 static inline u32 btrfs_extent_inline_ref_size(int type) 1797 { 1798 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1799 type == BTRFS_SHARED_BLOCK_REF_KEY) 1800 return sizeof(struct btrfs_extent_inline_ref); 1801 if (type == BTRFS_SHARED_DATA_REF_KEY) 1802 return sizeof(struct btrfs_shared_data_ref) + 1803 sizeof(struct btrfs_extent_inline_ref); 1804 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1805 return sizeof(struct btrfs_extent_data_ref) + 1806 offsetof(struct btrfs_extent_inline_ref, offset); 1807 return 0; 1808 } 1809 1810 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1811 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1812 generation, 64); 1813 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1814 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1815 1816 /* struct btrfs_node */ 1817 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1818 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1819 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1820 blockptr, 64); 1821 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1822 generation, 64); 1823 1824 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1825 { 1826 unsigned long ptr; 1827 ptr = offsetof(struct btrfs_node, ptrs) + 1828 sizeof(struct btrfs_key_ptr) * nr; 1829 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1830 } 1831 1832 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1833 int nr, u64 val) 1834 { 1835 unsigned long ptr; 1836 ptr = offsetof(struct btrfs_node, ptrs) + 1837 sizeof(struct btrfs_key_ptr) * nr; 1838 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1839 } 1840 1841 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1842 { 1843 unsigned long ptr; 1844 ptr = offsetof(struct btrfs_node, ptrs) + 1845 sizeof(struct btrfs_key_ptr) * nr; 1846 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1847 } 1848 1849 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1850 int nr, u64 val) 1851 { 1852 unsigned long ptr; 1853 ptr = offsetof(struct btrfs_node, ptrs) + 1854 sizeof(struct btrfs_key_ptr) * nr; 1855 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1856 } 1857 1858 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1859 { 1860 return offsetof(struct btrfs_node, ptrs) + 1861 sizeof(struct btrfs_key_ptr) * nr; 1862 } 1863 1864 void btrfs_node_key(const struct extent_buffer *eb, 1865 struct btrfs_disk_key *disk_key, int nr); 1866 1867 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1868 struct btrfs_disk_key *disk_key, int nr) 1869 { 1870 unsigned long ptr; 1871 ptr = btrfs_node_key_ptr_offset(nr); 1872 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1873 struct btrfs_key_ptr, key, disk_key); 1874 } 1875 1876 /* struct btrfs_item */ 1877 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1878 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1879 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1880 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1881 1882 static inline unsigned long btrfs_item_nr_offset(int nr) 1883 { 1884 return offsetof(struct btrfs_leaf, items) + 1885 sizeof(struct btrfs_item) * nr; 1886 } 1887 1888 static inline struct btrfs_item *btrfs_item_nr(int nr) 1889 { 1890 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1891 } 1892 1893 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1894 struct btrfs_item *item) 1895 { 1896 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1897 } 1898 1899 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1900 { 1901 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1902 } 1903 1904 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1905 { 1906 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1907 } 1908 1909 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1910 { 1911 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1912 } 1913 1914 static inline void btrfs_item_key(const struct extent_buffer *eb, 1915 struct btrfs_disk_key *disk_key, int nr) 1916 { 1917 struct btrfs_item *item = btrfs_item_nr(nr); 1918 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1919 } 1920 1921 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1922 struct btrfs_disk_key *disk_key, int nr) 1923 { 1924 struct btrfs_item *item = btrfs_item_nr(nr); 1925 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1926 } 1927 1928 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1929 1930 /* 1931 * struct btrfs_root_ref 1932 */ 1933 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1934 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1935 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1936 1937 /* struct btrfs_dir_item */ 1938 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1939 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1940 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1941 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1942 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1943 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1944 data_len, 16); 1945 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1946 name_len, 16); 1947 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1948 transid, 64); 1949 1950 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1951 const struct btrfs_dir_item *item, 1952 struct btrfs_disk_key *key) 1953 { 1954 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1955 } 1956 1957 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1958 struct btrfs_dir_item *item, 1959 const struct btrfs_disk_key *key) 1960 { 1961 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1962 } 1963 1964 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1965 num_entries, 64); 1966 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1967 num_bitmaps, 64); 1968 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1969 generation, 64); 1970 1971 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1972 const struct btrfs_free_space_header *h, 1973 struct btrfs_disk_key *key) 1974 { 1975 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1976 } 1977 1978 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1979 struct btrfs_free_space_header *h, 1980 const struct btrfs_disk_key *key) 1981 { 1982 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1983 } 1984 1985 /* struct btrfs_disk_key */ 1986 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1987 objectid, 64); 1988 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1989 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1990 1991 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1992 const struct btrfs_disk_key *disk) 1993 { 1994 cpu->offset = le64_to_cpu(disk->offset); 1995 cpu->type = disk->type; 1996 cpu->objectid = le64_to_cpu(disk->objectid); 1997 } 1998 1999 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2000 const struct btrfs_key *cpu) 2001 { 2002 disk->offset = cpu_to_le64(cpu->offset); 2003 disk->type = cpu->type; 2004 disk->objectid = cpu_to_le64(cpu->objectid); 2005 } 2006 2007 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2008 struct btrfs_key *key, int nr) 2009 { 2010 struct btrfs_disk_key disk_key; 2011 btrfs_node_key(eb, &disk_key, nr); 2012 btrfs_disk_key_to_cpu(key, &disk_key); 2013 } 2014 2015 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2016 struct btrfs_key *key, int nr) 2017 { 2018 struct btrfs_disk_key disk_key; 2019 btrfs_item_key(eb, &disk_key, nr); 2020 btrfs_disk_key_to_cpu(key, &disk_key); 2021 } 2022 2023 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2024 const struct btrfs_dir_item *item, 2025 struct btrfs_key *key) 2026 { 2027 struct btrfs_disk_key disk_key; 2028 btrfs_dir_item_key(eb, item, &disk_key); 2029 btrfs_disk_key_to_cpu(key, &disk_key); 2030 } 2031 2032 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2033 { 2034 return key->type; 2035 } 2036 2037 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2038 { 2039 key->type = val; 2040 } 2041 2042 /* struct btrfs_header */ 2043 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2044 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2045 generation, 64); 2046 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2047 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2048 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2049 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2050 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2051 generation, 64); 2052 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2053 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2054 nritems, 32); 2055 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2056 2057 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2058 { 2059 return (btrfs_header_flags(eb) & flag) == flag; 2060 } 2061 2062 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2063 { 2064 u64 flags = btrfs_header_flags(eb); 2065 btrfs_set_header_flags(eb, flags | flag); 2066 return (flags & flag) == flag; 2067 } 2068 2069 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2070 { 2071 u64 flags = btrfs_header_flags(eb); 2072 btrfs_set_header_flags(eb, flags & ~flag); 2073 return (flags & flag) == flag; 2074 } 2075 2076 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2077 { 2078 u64 flags = btrfs_header_flags(eb); 2079 return flags >> BTRFS_BACKREF_REV_SHIFT; 2080 } 2081 2082 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2083 int rev) 2084 { 2085 u64 flags = btrfs_header_flags(eb); 2086 flags &= ~BTRFS_BACKREF_REV_MASK; 2087 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2088 btrfs_set_header_flags(eb, flags); 2089 } 2090 2091 static inline unsigned long btrfs_header_fsid(void) 2092 { 2093 return offsetof(struct btrfs_header, fsid); 2094 } 2095 2096 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2097 { 2098 return offsetof(struct btrfs_header, chunk_tree_uuid); 2099 } 2100 2101 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2102 { 2103 return btrfs_header_level(eb) == 0; 2104 } 2105 2106 /* struct btrfs_root_item */ 2107 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2108 generation, 64); 2109 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2110 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2111 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2112 2113 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2114 generation, 64); 2115 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2116 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2117 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2118 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2119 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2120 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2121 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2122 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2123 last_snapshot, 64); 2124 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2125 generation_v2, 64); 2126 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2127 ctransid, 64); 2128 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2129 otransid, 64); 2130 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2131 stransid, 64); 2132 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2133 rtransid, 64); 2134 2135 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2136 { 2137 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2138 } 2139 2140 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2141 { 2142 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2143 } 2144 2145 /* struct btrfs_root_backup */ 2146 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2147 tree_root, 64); 2148 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2149 tree_root_gen, 64); 2150 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2151 tree_root_level, 8); 2152 2153 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2154 chunk_root, 64); 2155 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2156 chunk_root_gen, 64); 2157 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2158 chunk_root_level, 8); 2159 2160 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2161 extent_root, 64); 2162 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2163 extent_root_gen, 64); 2164 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2165 extent_root_level, 8); 2166 2167 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2168 fs_root, 64); 2169 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2170 fs_root_gen, 64); 2171 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2172 fs_root_level, 8); 2173 2174 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2175 dev_root, 64); 2176 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2177 dev_root_gen, 64); 2178 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2179 dev_root_level, 8); 2180 2181 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2182 csum_root, 64); 2183 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2184 csum_root_gen, 64); 2185 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2186 csum_root_level, 8); 2187 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2188 total_bytes, 64); 2189 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2190 bytes_used, 64); 2191 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2192 num_devices, 64); 2193 2194 /* struct btrfs_balance_item */ 2195 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2196 2197 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2198 const struct btrfs_balance_item *bi, 2199 struct btrfs_disk_balance_args *ba) 2200 { 2201 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2202 } 2203 2204 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2205 struct btrfs_balance_item *bi, 2206 const struct btrfs_disk_balance_args *ba) 2207 { 2208 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2209 } 2210 2211 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2212 const struct btrfs_balance_item *bi, 2213 struct btrfs_disk_balance_args *ba) 2214 { 2215 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2216 } 2217 2218 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2219 struct btrfs_balance_item *bi, 2220 const struct btrfs_disk_balance_args *ba) 2221 { 2222 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2223 } 2224 2225 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2226 const struct btrfs_balance_item *bi, 2227 struct btrfs_disk_balance_args *ba) 2228 { 2229 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2230 } 2231 2232 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2233 struct btrfs_balance_item *bi, 2234 const struct btrfs_disk_balance_args *ba) 2235 { 2236 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2237 } 2238 2239 static inline void 2240 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2241 const struct btrfs_disk_balance_args *disk) 2242 { 2243 memset(cpu, 0, sizeof(*cpu)); 2244 2245 cpu->profiles = le64_to_cpu(disk->profiles); 2246 cpu->usage = le64_to_cpu(disk->usage); 2247 cpu->devid = le64_to_cpu(disk->devid); 2248 cpu->pstart = le64_to_cpu(disk->pstart); 2249 cpu->pend = le64_to_cpu(disk->pend); 2250 cpu->vstart = le64_to_cpu(disk->vstart); 2251 cpu->vend = le64_to_cpu(disk->vend); 2252 cpu->target = le64_to_cpu(disk->target); 2253 cpu->flags = le64_to_cpu(disk->flags); 2254 cpu->limit = le64_to_cpu(disk->limit); 2255 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2256 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2257 } 2258 2259 static inline void 2260 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2261 const struct btrfs_balance_args *cpu) 2262 { 2263 memset(disk, 0, sizeof(*disk)); 2264 2265 disk->profiles = cpu_to_le64(cpu->profiles); 2266 disk->usage = cpu_to_le64(cpu->usage); 2267 disk->devid = cpu_to_le64(cpu->devid); 2268 disk->pstart = cpu_to_le64(cpu->pstart); 2269 disk->pend = cpu_to_le64(cpu->pend); 2270 disk->vstart = cpu_to_le64(cpu->vstart); 2271 disk->vend = cpu_to_le64(cpu->vend); 2272 disk->target = cpu_to_le64(cpu->target); 2273 disk->flags = cpu_to_le64(cpu->flags); 2274 disk->limit = cpu_to_le64(cpu->limit); 2275 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2276 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2277 } 2278 2279 /* struct btrfs_super_block */ 2280 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2281 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2282 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2283 generation, 64); 2284 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2285 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2286 struct btrfs_super_block, sys_chunk_array_size, 32); 2287 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2288 struct btrfs_super_block, chunk_root_generation, 64); 2289 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2290 root_level, 8); 2291 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2292 chunk_root, 64); 2293 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2294 chunk_root_level, 8); 2295 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2296 log_root, 64); 2297 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2298 log_root_transid, 64); 2299 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2300 log_root_level, 8); 2301 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2302 total_bytes, 64); 2303 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2304 bytes_used, 64); 2305 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2306 sectorsize, 32); 2307 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2308 nodesize, 32); 2309 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2310 stripesize, 32); 2311 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2312 root_dir_objectid, 64); 2313 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2314 num_devices, 64); 2315 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2316 compat_flags, 64); 2317 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2318 compat_ro_flags, 64); 2319 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2320 incompat_flags, 64); 2321 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2322 csum_type, 16); 2323 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2324 cache_generation, 64); 2325 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2326 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2327 uuid_tree_generation, 64); 2328 2329 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2330 { 2331 u16 t = btrfs_super_csum_type(s); 2332 /* 2333 * csum type is validated at mount time 2334 */ 2335 return btrfs_csum_sizes[t]; 2336 } 2337 2338 2339 /* 2340 * The leaf data grows from end-to-front in the node. 2341 * this returns the address of the start of the last item, 2342 * which is the stop of the leaf data stack 2343 */ 2344 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2345 const struct extent_buffer *leaf) 2346 { 2347 u32 nr = btrfs_header_nritems(leaf); 2348 2349 if (nr == 0) 2350 return BTRFS_LEAF_DATA_SIZE(fs_info); 2351 return btrfs_item_offset_nr(leaf, nr - 1); 2352 } 2353 2354 /* struct btrfs_file_extent_item */ 2355 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2356 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2357 struct btrfs_file_extent_item, disk_bytenr, 64); 2358 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2359 struct btrfs_file_extent_item, offset, 64); 2360 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2361 struct btrfs_file_extent_item, generation, 64); 2362 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2363 struct btrfs_file_extent_item, num_bytes, 64); 2364 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2365 struct btrfs_file_extent_item, disk_num_bytes, 64); 2366 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2367 struct btrfs_file_extent_item, compression, 8); 2368 2369 static inline unsigned long 2370 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2371 { 2372 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2373 } 2374 2375 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2376 { 2377 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2378 } 2379 2380 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2381 disk_bytenr, 64); 2382 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2383 generation, 64); 2384 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2385 disk_num_bytes, 64); 2386 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2387 offset, 64); 2388 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2389 num_bytes, 64); 2390 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2391 ram_bytes, 64); 2392 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2393 compression, 8); 2394 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2395 encryption, 8); 2396 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2397 other_encoding, 16); 2398 2399 /* 2400 * this returns the number of bytes used by the item on disk, minus the 2401 * size of any extent headers. If a file is compressed on disk, this is 2402 * the compressed size 2403 */ 2404 static inline u32 btrfs_file_extent_inline_item_len( 2405 const struct extent_buffer *eb, 2406 struct btrfs_item *e) 2407 { 2408 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2409 } 2410 2411 /* this returns the number of file bytes represented by the inline item. 2412 * If an item is compressed, this is the uncompressed size 2413 */ 2414 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb, 2415 int slot, 2416 const struct btrfs_file_extent_item *fi) 2417 { 2418 struct btrfs_map_token token; 2419 2420 btrfs_init_map_token(&token); 2421 /* 2422 * return the space used on disk if this item isn't 2423 * compressed or encoded 2424 */ 2425 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2426 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2427 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2428 return btrfs_file_extent_inline_item_len(eb, 2429 btrfs_item_nr(slot)); 2430 } 2431 2432 /* otherwise use the ram bytes field */ 2433 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2434 } 2435 2436 2437 /* btrfs_dev_stats_item */ 2438 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2439 const struct btrfs_dev_stats_item *ptr, 2440 int index) 2441 { 2442 u64 val; 2443 2444 read_extent_buffer(eb, &val, 2445 offsetof(struct btrfs_dev_stats_item, values) + 2446 ((unsigned long)ptr) + (index * sizeof(u64)), 2447 sizeof(val)); 2448 return val; 2449 } 2450 2451 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2452 struct btrfs_dev_stats_item *ptr, 2453 int index, u64 val) 2454 { 2455 write_extent_buffer(eb, &val, 2456 offsetof(struct btrfs_dev_stats_item, values) + 2457 ((unsigned long)ptr) + (index * sizeof(u64)), 2458 sizeof(val)); 2459 } 2460 2461 /* btrfs_qgroup_status_item */ 2462 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2463 generation, 64); 2464 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2465 version, 64); 2466 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2467 flags, 64); 2468 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2469 rescan, 64); 2470 2471 /* btrfs_qgroup_info_item */ 2472 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2473 generation, 64); 2474 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2475 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2476 rfer_cmpr, 64); 2477 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2478 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2479 excl_cmpr, 64); 2480 2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2482 struct btrfs_qgroup_info_item, generation, 64); 2483 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2484 rfer, 64); 2485 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2486 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2487 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2488 excl, 64); 2489 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2490 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2491 2492 /* btrfs_qgroup_limit_item */ 2493 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2494 flags, 64); 2495 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2496 max_rfer, 64); 2497 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2498 max_excl, 64); 2499 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2500 rsv_rfer, 64); 2501 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2502 rsv_excl, 64); 2503 2504 /* btrfs_dev_replace_item */ 2505 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2506 struct btrfs_dev_replace_item, src_devid, 64); 2507 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2508 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2509 64); 2510 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2511 replace_state, 64); 2512 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2513 time_started, 64); 2514 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2515 time_stopped, 64); 2516 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2517 num_write_errors, 64); 2518 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2519 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2520 64); 2521 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2522 cursor_left, 64); 2523 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2524 cursor_right, 64); 2525 2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2527 struct btrfs_dev_replace_item, src_devid, 64); 2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2529 struct btrfs_dev_replace_item, 2530 cont_reading_from_srcdev_mode, 64); 2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2532 struct btrfs_dev_replace_item, replace_state, 64); 2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2534 struct btrfs_dev_replace_item, time_started, 64); 2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2536 struct btrfs_dev_replace_item, time_stopped, 64); 2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2538 struct btrfs_dev_replace_item, num_write_errors, 64); 2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2540 struct btrfs_dev_replace_item, 2541 num_uncorrectable_read_errors, 64); 2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2543 struct btrfs_dev_replace_item, cursor_left, 64); 2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2545 struct btrfs_dev_replace_item, cursor_right, 64); 2546 2547 /* helper function to cast into the data area of the leaf. */ 2548 #define btrfs_item_ptr(leaf, slot, type) \ 2549 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2550 btrfs_item_offset_nr(leaf, slot))) 2551 2552 #define btrfs_item_ptr_offset(leaf, slot) \ 2553 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2554 btrfs_item_offset_nr(leaf, slot))) 2555 2556 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2557 { 2558 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2559 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2560 } 2561 2562 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2563 { 2564 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2565 } 2566 2567 /* extent-tree.c */ 2568 2569 enum btrfs_inline_ref_type { 2570 BTRFS_REF_TYPE_INVALID = 0, 2571 BTRFS_REF_TYPE_BLOCK = 1, 2572 BTRFS_REF_TYPE_DATA = 2, 2573 BTRFS_REF_TYPE_ANY = 3, 2574 }; 2575 2576 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2577 struct btrfs_extent_inline_ref *iref, 2578 enum btrfs_inline_ref_type is_data); 2579 2580 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2581 2582 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2583 unsigned num_items) 2584 { 2585 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2586 } 2587 2588 /* 2589 * Doing a truncate won't result in new nodes or leaves, just what we need for 2590 * COW. 2591 */ 2592 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2593 unsigned num_items) 2594 { 2595 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2596 } 2597 2598 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2599 struct btrfs_fs_info *fs_info); 2600 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2601 struct btrfs_fs_info *fs_info); 2602 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2603 const u64 start); 2604 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2605 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2606 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2607 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2608 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2609 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2610 struct btrfs_fs_info *fs_info, unsigned long count); 2611 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2612 unsigned long count, u64 transid, int wait); 2613 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2614 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2615 struct btrfs_fs_info *fs_info, u64 bytenr, 2616 u64 offset, int metadata, u64 *refs, u64 *flags); 2617 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2618 u64 bytenr, u64 num, int reserved); 2619 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2620 u64 bytenr, u64 num_bytes); 2621 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2622 struct extent_buffer *eb); 2623 int btrfs_cross_ref_exist(struct btrfs_root *root, 2624 u64 objectid, u64 offset, u64 bytenr); 2625 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2626 struct btrfs_fs_info *info, 2627 u64 bytenr); 2628 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2629 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2630 int get_block_group_index(struct btrfs_block_group_cache *cache); 2631 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2632 struct btrfs_root *root, 2633 u64 parent, u64 root_objectid, 2634 const struct btrfs_disk_key *key, 2635 int level, u64 hint, 2636 u64 empty_size); 2637 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2638 struct btrfs_root *root, 2639 struct extent_buffer *buf, 2640 u64 parent, int last_ref); 2641 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2642 u64 root_objectid, u64 owner, 2643 u64 offset, u64 ram_bytes, 2644 struct btrfs_key *ins); 2645 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2646 struct btrfs_fs_info *fs_info, 2647 u64 root_objectid, u64 owner, u64 offset, 2648 struct btrfs_key *ins); 2649 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2650 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2651 struct btrfs_key *ins, int is_data, int delalloc); 2652 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2653 struct extent_buffer *buf, int full_backref); 2654 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2655 struct extent_buffer *buf, int full_backref); 2656 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2657 struct btrfs_fs_info *fs_info, 2658 u64 bytenr, u64 num_bytes, u64 flags, 2659 int level, int is_data); 2660 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2661 struct btrfs_fs_info *fs_info, 2662 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2663 u64 owner, u64 offset); 2664 2665 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2666 u64 start, u64 len, int delalloc); 2667 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2668 u64 start, u64 len); 2669 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2670 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2671 struct btrfs_fs_info *fs_info); 2672 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2673 struct btrfs_fs_info *fs_info, 2674 u64 bytenr, u64 num_bytes, u64 parent, 2675 u64 root_objectid, u64 owner, u64 offset); 2676 2677 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, 2678 struct btrfs_fs_info *fs_info); 2679 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2680 struct btrfs_fs_info *fs_info); 2681 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2682 struct btrfs_fs_info *fs_info); 2683 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2684 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2685 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2686 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2687 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2688 struct btrfs_fs_info *fs_info, u64 bytes_used, 2689 u64 type, u64 chunk_offset, u64 size); 2690 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2691 struct btrfs_fs_info *fs_info, 2692 const u64 chunk_offset); 2693 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2694 struct btrfs_fs_info *fs_info, u64 group_start, 2695 struct extent_map *em); 2696 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2697 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2698 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2699 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, 2700 struct btrfs_fs_info *fs_info); 2701 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2702 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2703 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2704 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2705 2706 enum btrfs_reserve_flush_enum { 2707 /* If we are in the transaction, we can't flush anything.*/ 2708 BTRFS_RESERVE_NO_FLUSH, 2709 /* 2710 * Flushing delalloc may cause deadlock somewhere, in this 2711 * case, use FLUSH LIMIT 2712 */ 2713 BTRFS_RESERVE_FLUSH_LIMIT, 2714 BTRFS_RESERVE_FLUSH_ALL, 2715 }; 2716 2717 enum btrfs_flush_state { 2718 FLUSH_DELAYED_ITEMS_NR = 1, 2719 FLUSH_DELAYED_ITEMS = 2, 2720 FLUSH_DELALLOC = 3, 2721 FLUSH_DELALLOC_WAIT = 4, 2722 ALLOC_CHUNK = 5, 2723 COMMIT_TRANS = 6, 2724 }; 2725 2726 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2727 int btrfs_check_data_free_space(struct inode *inode, 2728 struct extent_changeset **reserved, u64 start, u64 len); 2729 void btrfs_free_reserved_data_space(struct inode *inode, 2730 struct extent_changeset *reserved, u64 start, u64 len); 2731 void btrfs_delalloc_release_space(struct inode *inode, 2732 struct extent_changeset *reserved, u64 start, u64 len); 2733 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2734 u64 len); 2735 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, 2736 struct btrfs_fs_info *fs_info); 2737 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2738 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2739 struct btrfs_inode *inode); 2740 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2741 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2742 struct btrfs_block_rsv *rsv, 2743 int nitems, 2744 u64 *qgroup_reserved, bool use_global_rsv); 2745 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2746 struct btrfs_block_rsv *rsv); 2747 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2748 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes); 2749 int btrfs_delalloc_reserve_space(struct inode *inode, 2750 struct extent_changeset **reserved, u64 start, u64 len); 2751 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2752 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2753 unsigned short type); 2754 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2755 struct btrfs_block_rsv *rsv); 2756 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2757 int btrfs_block_rsv_add(struct btrfs_root *root, 2758 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2759 enum btrfs_reserve_flush_enum flush); 2760 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2761 int btrfs_block_rsv_refill(struct btrfs_root *root, 2762 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2763 enum btrfs_reserve_flush_enum flush); 2764 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2765 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2766 int update_size); 2767 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2768 struct btrfs_block_rsv *dest, u64 num_bytes, 2769 int min_factor); 2770 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2771 struct btrfs_block_rsv *block_rsv, 2772 u64 num_bytes); 2773 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2774 struct btrfs_block_group_cache *cache); 2775 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2776 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2777 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2778 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2779 u64 start, u64 end); 2780 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2781 u64 num_bytes, u64 *actual_bytes); 2782 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2783 struct btrfs_fs_info *fs_info, u64 type); 2784 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2785 2786 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2787 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2788 struct btrfs_fs_info *fs_info); 2789 int __get_raid_index(u64 flags); 2790 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2791 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2792 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2793 void check_system_chunk(struct btrfs_trans_handle *trans, 2794 struct btrfs_fs_info *fs_info, const u64 type); 2795 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2796 struct btrfs_fs_info *info, u64 start, u64 end); 2797 2798 /* ctree.c */ 2799 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2800 int level, int *slot); 2801 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2802 int btrfs_previous_item(struct btrfs_root *root, 2803 struct btrfs_path *path, u64 min_objectid, 2804 int type); 2805 int btrfs_previous_extent_item(struct btrfs_root *root, 2806 struct btrfs_path *path, u64 min_objectid); 2807 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2808 struct btrfs_path *path, 2809 const struct btrfs_key *new_key); 2810 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2811 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2812 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2813 struct btrfs_key *key, int lowest_level, 2814 u64 min_trans); 2815 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2816 struct btrfs_path *path, 2817 u64 min_trans); 2818 enum btrfs_compare_tree_result { 2819 BTRFS_COMPARE_TREE_NEW, 2820 BTRFS_COMPARE_TREE_DELETED, 2821 BTRFS_COMPARE_TREE_CHANGED, 2822 BTRFS_COMPARE_TREE_SAME, 2823 }; 2824 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, 2825 struct btrfs_root *right_root, 2826 struct btrfs_path *left_path, 2827 struct btrfs_path *right_path, 2828 struct btrfs_key *key, 2829 enum btrfs_compare_tree_result result, 2830 void *ctx); 2831 int btrfs_compare_trees(struct btrfs_root *left_root, 2832 struct btrfs_root *right_root, 2833 btrfs_changed_cb_t cb, void *ctx); 2834 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2835 struct btrfs_root *root, struct extent_buffer *buf, 2836 struct extent_buffer *parent, int parent_slot, 2837 struct extent_buffer **cow_ret); 2838 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2839 struct btrfs_root *root, 2840 struct extent_buffer *buf, 2841 struct extent_buffer **cow_ret, u64 new_root_objectid); 2842 int btrfs_block_can_be_shared(struct btrfs_root *root, 2843 struct extent_buffer *buf); 2844 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2845 u32 data_size); 2846 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2847 struct btrfs_path *path, u32 new_size, int from_end); 2848 int btrfs_split_item(struct btrfs_trans_handle *trans, 2849 struct btrfs_root *root, 2850 struct btrfs_path *path, 2851 const struct btrfs_key *new_key, 2852 unsigned long split_offset); 2853 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2854 struct btrfs_root *root, 2855 struct btrfs_path *path, 2856 const struct btrfs_key *new_key); 2857 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2858 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2859 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2860 const struct btrfs_key *key, struct btrfs_path *p, 2861 int ins_len, int cow); 2862 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2863 struct btrfs_path *p, u64 time_seq); 2864 int btrfs_search_slot_for_read(struct btrfs_root *root, 2865 const struct btrfs_key *key, 2866 struct btrfs_path *p, int find_higher, 2867 int return_any); 2868 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2869 struct btrfs_root *root, struct extent_buffer *parent, 2870 int start_slot, u64 *last_ret, 2871 struct btrfs_key *progress); 2872 void btrfs_release_path(struct btrfs_path *p); 2873 struct btrfs_path *btrfs_alloc_path(void); 2874 void btrfs_free_path(struct btrfs_path *p); 2875 void btrfs_set_path_blocking(struct btrfs_path *p); 2876 void btrfs_clear_path_blocking(struct btrfs_path *p, 2877 struct extent_buffer *held, int held_rw); 2878 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2879 2880 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2881 struct btrfs_path *path, int slot, int nr); 2882 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2883 struct btrfs_root *root, 2884 struct btrfs_path *path) 2885 { 2886 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2887 } 2888 2889 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2890 const struct btrfs_key *cpu_key, u32 *data_size, 2891 u32 total_data, u32 total_size, int nr); 2892 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2893 const struct btrfs_key *key, void *data, u32 data_size); 2894 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2895 struct btrfs_root *root, 2896 struct btrfs_path *path, 2897 const struct btrfs_key *cpu_key, u32 *data_size, 2898 int nr); 2899 2900 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2901 struct btrfs_root *root, 2902 struct btrfs_path *path, 2903 const struct btrfs_key *key, 2904 u32 data_size) 2905 { 2906 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2907 } 2908 2909 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2910 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2911 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2912 u64 time_seq); 2913 static inline int btrfs_next_old_item(struct btrfs_root *root, 2914 struct btrfs_path *p, u64 time_seq) 2915 { 2916 ++p->slots[0]; 2917 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2918 return btrfs_next_old_leaf(root, p, time_seq); 2919 return 0; 2920 } 2921 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2922 { 2923 return btrfs_next_old_item(root, p, 0); 2924 } 2925 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2926 struct extent_buffer *leaf); 2927 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2928 struct btrfs_block_rsv *block_rsv, 2929 int update_ref, int for_reloc); 2930 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2931 struct btrfs_root *root, 2932 struct extent_buffer *node, 2933 struct extent_buffer *parent); 2934 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2935 { 2936 /* 2937 * Do it this way so we only ever do one test_bit in the normal case. 2938 */ 2939 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2940 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2941 return 2; 2942 return 1; 2943 } 2944 return 0; 2945 } 2946 2947 /* 2948 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2949 * anything except sleeping. This function is used to check the status of 2950 * the fs. 2951 */ 2952 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2953 { 2954 return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info); 2955 } 2956 2957 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2958 { 2959 kfree(fs_info->balance_ctl); 2960 kfree(fs_info->delayed_root); 2961 kfree(fs_info->extent_root); 2962 kfree(fs_info->tree_root); 2963 kfree(fs_info->chunk_root); 2964 kfree(fs_info->dev_root); 2965 kfree(fs_info->csum_root); 2966 kfree(fs_info->quota_root); 2967 kfree(fs_info->uuid_root); 2968 kfree(fs_info->free_space_root); 2969 kfree(fs_info->super_copy); 2970 kfree(fs_info->super_for_commit); 2971 security_free_mnt_opts(&fs_info->security_opts); 2972 kfree(fs_info); 2973 } 2974 2975 /* tree mod log functions from ctree.c */ 2976 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2977 struct seq_list *elem); 2978 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2979 struct seq_list *elem); 2980 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2981 2982 /* root-item.c */ 2983 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2984 struct btrfs_fs_info *fs_info, 2985 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2986 const char *name, int name_len); 2987 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2988 struct btrfs_fs_info *fs_info, 2989 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2990 const char *name, int name_len); 2991 int btrfs_del_root(struct btrfs_trans_handle *trans, 2992 struct btrfs_fs_info *fs_info, const struct btrfs_key *key); 2993 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2994 const struct btrfs_key *key, 2995 struct btrfs_root_item *item); 2996 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2997 struct btrfs_root *root, 2998 struct btrfs_key *key, 2999 struct btrfs_root_item *item); 3000 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3001 struct btrfs_path *path, struct btrfs_root_item *root_item, 3002 struct btrfs_key *root_key); 3003 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3004 void btrfs_set_root_node(struct btrfs_root_item *item, 3005 struct extent_buffer *node); 3006 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3007 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3008 struct btrfs_root *root); 3009 3010 /* uuid-tree.c */ 3011 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 3012 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3013 u64 subid); 3014 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 3015 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3016 u64 subid); 3017 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3018 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3019 u64)); 3020 3021 /* dir-item.c */ 3022 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3023 const char *name, int name_len); 3024 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3025 struct btrfs_root *root, const char *name, 3026 int name_len, struct btrfs_inode *dir, 3027 struct btrfs_key *location, u8 type, u64 index); 3028 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3029 struct btrfs_root *root, 3030 struct btrfs_path *path, u64 dir, 3031 const char *name, int name_len, 3032 int mod); 3033 struct btrfs_dir_item * 3034 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3035 struct btrfs_root *root, 3036 struct btrfs_path *path, u64 dir, 3037 u64 objectid, const char *name, int name_len, 3038 int mod); 3039 struct btrfs_dir_item * 3040 btrfs_search_dir_index_item(struct btrfs_root *root, 3041 struct btrfs_path *path, u64 dirid, 3042 const char *name, int name_len); 3043 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3044 struct btrfs_root *root, 3045 struct btrfs_path *path, 3046 struct btrfs_dir_item *di); 3047 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3048 struct btrfs_root *root, 3049 struct btrfs_path *path, u64 objectid, 3050 const char *name, u16 name_len, 3051 const void *data, u16 data_len); 3052 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3053 struct btrfs_root *root, 3054 struct btrfs_path *path, u64 dir, 3055 const char *name, u16 name_len, 3056 int mod); 3057 int verify_dir_item(struct btrfs_fs_info *fs_info, 3058 struct extent_buffer *leaf, int slot, 3059 struct btrfs_dir_item *dir_item); 3060 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3061 struct btrfs_path *path, 3062 const char *name, 3063 int name_len); 3064 bool btrfs_is_name_len_valid(struct extent_buffer *leaf, int slot, 3065 unsigned long start, u16 name_len); 3066 3067 /* orphan.c */ 3068 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3069 struct btrfs_root *root, u64 offset); 3070 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3071 struct btrfs_root *root, u64 offset); 3072 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3073 3074 /* inode-item.c */ 3075 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3076 struct btrfs_root *root, 3077 const char *name, int name_len, 3078 u64 inode_objectid, u64 ref_objectid, u64 index); 3079 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3080 struct btrfs_root *root, 3081 const char *name, int name_len, 3082 u64 inode_objectid, u64 ref_objectid, u64 *index); 3083 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3084 struct btrfs_root *root, 3085 struct btrfs_path *path, u64 objectid); 3086 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3087 *root, struct btrfs_path *path, 3088 struct btrfs_key *location, int mod); 3089 3090 struct btrfs_inode_extref * 3091 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3092 struct btrfs_root *root, 3093 struct btrfs_path *path, 3094 const char *name, int name_len, 3095 u64 inode_objectid, u64 ref_objectid, int ins_len, 3096 int cow); 3097 3098 int btrfs_find_name_in_ext_backref(struct btrfs_path *path, 3099 u64 ref_objectid, const char *name, 3100 int name_len, 3101 struct btrfs_inode_extref **extref_ret); 3102 3103 /* file-item.c */ 3104 struct btrfs_dio_private; 3105 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3106 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3107 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3108 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3109 u64 logical_offset); 3110 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3111 struct btrfs_root *root, 3112 u64 objectid, u64 pos, 3113 u64 disk_offset, u64 disk_num_bytes, 3114 u64 num_bytes, u64 offset, u64 ram_bytes, 3115 u8 compression, u8 encryption, u16 other_encoding); 3116 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3117 struct btrfs_root *root, 3118 struct btrfs_path *path, u64 objectid, 3119 u64 bytenr, int mod); 3120 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3121 struct btrfs_root *root, 3122 struct btrfs_ordered_sum *sums); 3123 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3124 u64 file_start, int contig); 3125 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3126 struct list_head *list, int search_commit); 3127 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3128 const struct btrfs_path *path, 3129 struct btrfs_file_extent_item *fi, 3130 const bool new_inline, 3131 struct extent_map *em); 3132 3133 /* inode.c */ 3134 struct btrfs_delalloc_work { 3135 struct inode *inode; 3136 int delay_iput; 3137 struct completion completion; 3138 struct list_head list; 3139 struct btrfs_work work; 3140 }; 3141 3142 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3143 int delay_iput); 3144 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3145 3146 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3147 struct page *page, size_t pg_offset, u64 start, 3148 u64 len, int create); 3149 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3150 u64 *orig_start, u64 *orig_block_len, 3151 u64 *ram_bytes); 3152 3153 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3154 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3155 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3156 struct btrfs_root *root, 3157 struct btrfs_inode *dir, struct btrfs_inode *inode, 3158 const char *name, int name_len); 3159 int btrfs_add_link(struct btrfs_trans_handle *trans, 3160 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3161 const char *name, int name_len, int add_backref, u64 index); 3162 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3163 struct btrfs_root *root, 3164 struct inode *dir, u64 objectid, 3165 const char *name, int name_len); 3166 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3167 int front); 3168 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3169 struct btrfs_root *root, 3170 struct inode *inode, u64 new_size, 3171 u32 min_type); 3172 3173 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3174 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3175 int nr); 3176 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3177 struct extent_state **cached_state, int dedupe); 3178 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3179 struct btrfs_root *new_root, 3180 struct btrfs_root *parent_root, 3181 u64 new_dirid); 3182 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3183 size_t size, struct bio *bio, 3184 unsigned long bio_flags); 3185 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3186 int btrfs_page_mkwrite(struct vm_fault *vmf); 3187 int btrfs_readpage(struct file *file, struct page *page); 3188 void btrfs_evict_inode(struct inode *inode); 3189 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3190 struct inode *btrfs_alloc_inode(struct super_block *sb); 3191 void btrfs_destroy_inode(struct inode *inode); 3192 int btrfs_drop_inode(struct inode *inode); 3193 int btrfs_init_cachep(void); 3194 void btrfs_destroy_cachep(void); 3195 long btrfs_ioctl_trans_end(struct file *file); 3196 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3197 struct btrfs_root *root, int *was_new); 3198 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3199 struct page *page, size_t pg_offset, 3200 u64 start, u64 end, int create); 3201 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3202 struct btrfs_root *root, 3203 struct inode *inode); 3204 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3205 struct btrfs_root *root, struct inode *inode); 3206 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3207 struct btrfs_inode *inode); 3208 int btrfs_orphan_cleanup(struct btrfs_root *root); 3209 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3210 struct btrfs_root *root); 3211 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3212 void btrfs_invalidate_inodes(struct btrfs_root *root); 3213 void btrfs_add_delayed_iput(struct inode *inode); 3214 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3215 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3216 u64 start, u64 num_bytes, u64 min_size, 3217 loff_t actual_len, u64 *alloc_hint); 3218 int btrfs_prealloc_file_range_trans(struct inode *inode, 3219 struct btrfs_trans_handle *trans, int mode, 3220 u64 start, u64 num_bytes, u64 min_size, 3221 loff_t actual_len, u64 *alloc_hint); 3222 extern const struct dentry_operations btrfs_dentry_operations; 3223 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3224 void btrfs_test_inode_set_ops(struct inode *inode); 3225 #endif 3226 3227 /* ioctl.c */ 3228 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3229 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3230 int btrfs_ioctl_get_supported_features(void __user *arg); 3231 void btrfs_update_iflags(struct inode *inode); 3232 int btrfs_is_empty_uuid(u8 *uuid); 3233 int btrfs_defrag_file(struct inode *inode, struct file *file, 3234 struct btrfs_ioctl_defrag_range_args *range, 3235 u64 newer_than, unsigned long max_pages); 3236 void btrfs_get_block_group_info(struct list_head *groups_list, 3237 struct btrfs_ioctl_space_info *space); 3238 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3239 struct btrfs_ioctl_balance_args *bargs); 3240 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3241 struct file *dst_file, u64 dst_loff); 3242 3243 /* file.c */ 3244 int btrfs_auto_defrag_init(void); 3245 void btrfs_auto_defrag_exit(void); 3246 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3247 struct btrfs_inode *inode); 3248 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3249 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3250 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3251 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3252 int skip_pinned); 3253 extern const struct file_operations btrfs_file_operations; 3254 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3255 struct btrfs_root *root, struct inode *inode, 3256 struct btrfs_path *path, u64 start, u64 end, 3257 u64 *drop_end, int drop_cache, 3258 int replace_extent, 3259 u32 extent_item_size, 3260 int *key_inserted); 3261 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3262 struct btrfs_root *root, struct inode *inode, u64 start, 3263 u64 end, int drop_cache); 3264 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3265 struct btrfs_inode *inode, u64 start, u64 end); 3266 int btrfs_release_file(struct inode *inode, struct file *file); 3267 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3268 size_t num_pages, loff_t pos, size_t write_bytes, 3269 struct extent_state **cached); 3270 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3271 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3272 struct file *file_out, loff_t pos_out, u64 len); 3273 3274 /* tree-defrag.c */ 3275 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3276 struct btrfs_root *root); 3277 3278 /* sysfs.c */ 3279 int btrfs_init_sysfs(void); 3280 void btrfs_exit_sysfs(void); 3281 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3282 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3283 3284 /* xattr.c */ 3285 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 3286 3287 /* super.c */ 3288 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3289 unsigned long new_flags); 3290 int btrfs_sync_fs(struct super_block *sb, int wait); 3291 3292 static inline __printf(2, 3) 3293 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3294 { 3295 } 3296 3297 #ifdef CONFIG_PRINTK 3298 __printf(2, 3) 3299 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3300 #else 3301 #define btrfs_printk(fs_info, fmt, args...) \ 3302 btrfs_no_printk(fs_info, fmt, ##args) 3303 #endif 3304 3305 #define btrfs_emerg(fs_info, fmt, args...) \ 3306 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3307 #define btrfs_alert(fs_info, fmt, args...) \ 3308 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3309 #define btrfs_crit(fs_info, fmt, args...) \ 3310 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3311 #define btrfs_err(fs_info, fmt, args...) \ 3312 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3313 #define btrfs_warn(fs_info, fmt, args...) \ 3314 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3315 #define btrfs_notice(fs_info, fmt, args...) \ 3316 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3317 #define btrfs_info(fs_info, fmt, args...) \ 3318 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3319 3320 /* 3321 * Wrappers that use printk_in_rcu 3322 */ 3323 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3324 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3325 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3326 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3327 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3328 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3329 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3330 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3331 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3332 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3333 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3334 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3335 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3336 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3337 3338 /* 3339 * Wrappers that use a ratelimited printk_in_rcu 3340 */ 3341 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3342 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3343 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3344 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3345 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3346 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3347 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3348 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3349 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3350 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3351 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3352 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3353 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3354 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3355 3356 /* 3357 * Wrappers that use a ratelimited printk 3358 */ 3359 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3360 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3361 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3362 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3363 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3364 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3365 #define btrfs_err_rl(fs_info, fmt, args...) \ 3366 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3367 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3368 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3369 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3370 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3371 #define btrfs_info_rl(fs_info, fmt, args...) \ 3372 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3373 3374 #if defined(CONFIG_DYNAMIC_DEBUG) 3375 #define btrfs_debug(fs_info, fmt, args...) \ 3376 do { \ 3377 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3378 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3379 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3380 } while (0) 3381 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3382 do { \ 3383 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3384 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3385 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3386 } while (0) 3387 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3388 do { \ 3389 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3390 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3391 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3392 ##args);\ 3393 } while (0) 3394 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3395 do { \ 3396 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3397 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3398 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3399 ##args); \ 3400 } while (0) 3401 #elif defined(DEBUG) 3402 #define btrfs_debug(fs_info, fmt, args...) \ 3403 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3404 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3405 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3406 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3407 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3408 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3409 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3410 #else 3411 #define btrfs_debug(fs_info, fmt, args...) \ 3412 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3413 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3414 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3415 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3416 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3417 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3418 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3419 #endif 3420 3421 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3422 do { \ 3423 rcu_read_lock(); \ 3424 btrfs_printk(fs_info, fmt, ##args); \ 3425 rcu_read_unlock(); \ 3426 } while (0) 3427 3428 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3429 do { \ 3430 static DEFINE_RATELIMIT_STATE(_rs, \ 3431 DEFAULT_RATELIMIT_INTERVAL, \ 3432 DEFAULT_RATELIMIT_BURST); \ 3433 if (__ratelimit(&_rs)) \ 3434 btrfs_printk(fs_info, fmt, ##args); \ 3435 } while (0) 3436 3437 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3438 do { \ 3439 rcu_read_lock(); \ 3440 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3441 rcu_read_unlock(); \ 3442 } while (0) 3443 3444 #ifdef CONFIG_BTRFS_ASSERT 3445 3446 __cold 3447 static inline void assfail(char *expr, char *file, int line) 3448 { 3449 pr_err("assertion failed: %s, file: %s, line: %d\n", 3450 expr, file, line); 3451 BUG(); 3452 } 3453 3454 #define ASSERT(expr) \ 3455 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3456 #else 3457 #define ASSERT(expr) ((void)0) 3458 #endif 3459 3460 __printf(5, 6) 3461 __cold 3462 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3463 unsigned int line, int errno, const char *fmt, ...); 3464 3465 const char *btrfs_decode_error(int errno); 3466 3467 __cold 3468 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3469 const char *function, 3470 unsigned int line, int errno); 3471 3472 /* 3473 * Call btrfs_abort_transaction as early as possible when an error condition is 3474 * detected, that way the exact line number is reported. 3475 */ 3476 #define btrfs_abort_transaction(trans, errno) \ 3477 do { \ 3478 /* Report first abort since mount */ \ 3479 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3480 &((trans)->fs_info->fs_state))) { \ 3481 if ((errno) != -EIO) { \ 3482 WARN(1, KERN_DEBUG \ 3483 "BTRFS: Transaction aborted (error %d)\n", \ 3484 (errno)); \ 3485 } else { \ 3486 btrfs_debug((trans)->fs_info, \ 3487 "Transaction aborted (error %d)", \ 3488 (errno)); \ 3489 } \ 3490 } \ 3491 __btrfs_abort_transaction((trans), __func__, \ 3492 __LINE__, (errno)); \ 3493 } while (0) 3494 3495 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3496 do { \ 3497 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3498 (errno), fmt, ##args); \ 3499 } while (0) 3500 3501 __printf(5, 6) 3502 __cold 3503 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3504 unsigned int line, int errno, const char *fmt, ...); 3505 /* 3506 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3507 * will panic(). Otherwise we BUG() here. 3508 */ 3509 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3510 do { \ 3511 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3512 BUG(); \ 3513 } while (0) 3514 3515 3516 /* compatibility and incompatibility defines */ 3517 3518 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3519 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3520 3521 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3522 u64 flag) 3523 { 3524 struct btrfs_super_block *disk_super; 3525 u64 features; 3526 3527 disk_super = fs_info->super_copy; 3528 features = btrfs_super_incompat_flags(disk_super); 3529 if (!(features & flag)) { 3530 spin_lock(&fs_info->super_lock); 3531 features = btrfs_super_incompat_flags(disk_super); 3532 if (!(features & flag)) { 3533 features |= flag; 3534 btrfs_set_super_incompat_flags(disk_super, features); 3535 btrfs_info(fs_info, "setting %llu feature flag", 3536 flag); 3537 } 3538 spin_unlock(&fs_info->super_lock); 3539 } 3540 } 3541 3542 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3543 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3544 3545 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3546 u64 flag) 3547 { 3548 struct btrfs_super_block *disk_super; 3549 u64 features; 3550 3551 disk_super = fs_info->super_copy; 3552 features = btrfs_super_incompat_flags(disk_super); 3553 if (features & flag) { 3554 spin_lock(&fs_info->super_lock); 3555 features = btrfs_super_incompat_flags(disk_super); 3556 if (features & flag) { 3557 features &= ~flag; 3558 btrfs_set_super_incompat_flags(disk_super, features); 3559 btrfs_info(fs_info, "clearing %llu feature flag", 3560 flag); 3561 } 3562 spin_unlock(&fs_info->super_lock); 3563 } 3564 } 3565 3566 #define btrfs_fs_incompat(fs_info, opt) \ 3567 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3568 3569 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3570 { 3571 struct btrfs_super_block *disk_super; 3572 disk_super = fs_info->super_copy; 3573 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3574 } 3575 3576 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3577 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3578 3579 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3580 u64 flag) 3581 { 3582 struct btrfs_super_block *disk_super; 3583 u64 features; 3584 3585 disk_super = fs_info->super_copy; 3586 features = btrfs_super_compat_ro_flags(disk_super); 3587 if (!(features & flag)) { 3588 spin_lock(&fs_info->super_lock); 3589 features = btrfs_super_compat_ro_flags(disk_super); 3590 if (!(features & flag)) { 3591 features |= flag; 3592 btrfs_set_super_compat_ro_flags(disk_super, features); 3593 btrfs_info(fs_info, "setting %llu ro feature flag", 3594 flag); 3595 } 3596 spin_unlock(&fs_info->super_lock); 3597 } 3598 } 3599 3600 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3601 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3602 3603 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3604 u64 flag) 3605 { 3606 struct btrfs_super_block *disk_super; 3607 u64 features; 3608 3609 disk_super = fs_info->super_copy; 3610 features = btrfs_super_compat_ro_flags(disk_super); 3611 if (features & flag) { 3612 spin_lock(&fs_info->super_lock); 3613 features = btrfs_super_compat_ro_flags(disk_super); 3614 if (features & flag) { 3615 features &= ~flag; 3616 btrfs_set_super_compat_ro_flags(disk_super, features); 3617 btrfs_info(fs_info, "clearing %llu ro feature flag", 3618 flag); 3619 } 3620 spin_unlock(&fs_info->super_lock); 3621 } 3622 } 3623 3624 #define btrfs_fs_compat_ro(fs_info, opt) \ 3625 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3626 3627 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3628 { 3629 struct btrfs_super_block *disk_super; 3630 disk_super = fs_info->super_copy; 3631 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3632 } 3633 3634 /* acl.c */ 3635 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3636 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3637 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3638 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3639 struct inode *inode, struct inode *dir); 3640 #else 3641 #define btrfs_get_acl NULL 3642 #define btrfs_set_acl NULL 3643 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3644 struct inode *inode, struct inode *dir) 3645 { 3646 return 0; 3647 } 3648 #endif 3649 3650 /* relocation.c */ 3651 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3652 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3653 struct btrfs_root *root); 3654 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3655 struct btrfs_root *root); 3656 int btrfs_recover_relocation(struct btrfs_root *root); 3657 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3658 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3659 struct btrfs_root *root, struct extent_buffer *buf, 3660 struct extent_buffer *cow); 3661 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3662 u64 *bytes_to_reserve); 3663 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3664 struct btrfs_pending_snapshot *pending); 3665 3666 /* scrub.c */ 3667 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3668 u64 end, struct btrfs_scrub_progress *progress, 3669 int readonly, int is_dev_replace); 3670 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3671 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3672 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3673 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3674 struct btrfs_device *dev); 3675 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3676 struct btrfs_scrub_progress *progress); 3677 static inline void btrfs_init_full_stripe_locks_tree( 3678 struct btrfs_full_stripe_locks_tree *locks_root) 3679 { 3680 locks_root->root = RB_ROOT; 3681 mutex_init(&locks_root->lock); 3682 } 3683 3684 /* dev-replace.c */ 3685 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3686 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3687 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3688 3689 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3690 { 3691 btrfs_bio_counter_sub(fs_info, 1); 3692 } 3693 3694 /* reada.c */ 3695 struct reada_control { 3696 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3697 struct btrfs_key key_start; 3698 struct btrfs_key key_end; /* exclusive */ 3699 atomic_t elems; 3700 struct kref refcnt; 3701 wait_queue_head_t wait; 3702 }; 3703 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3704 struct btrfs_key *start, struct btrfs_key *end); 3705 int btrfs_reada_wait(void *handle); 3706 void btrfs_reada_detach(void *handle); 3707 int btree_readahead_hook(struct extent_buffer *eb, int err); 3708 3709 static inline int is_fstree(u64 rootid) 3710 { 3711 if (rootid == BTRFS_FS_TREE_OBJECTID || 3712 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3713 !btrfs_qgroup_level(rootid))) 3714 return 1; 3715 return 0; 3716 } 3717 3718 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3719 { 3720 return signal_pending(current); 3721 } 3722 3723 /* Sanity test specific functions */ 3724 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3725 void btrfs_test_destroy_inode(struct inode *inode); 3726 #endif 3727 3728 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3729 { 3730 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3731 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3732 &fs_info->fs_state))) 3733 return 1; 3734 #endif 3735 return 0; 3736 } 3737 #endif 3738