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 SZ_2M 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 spinlock_t lock; 683 }; 684 685 /* used by the raid56 code to lock stripes for read/modify/write */ 686 struct btrfs_stripe_hash_table { 687 struct list_head stripe_cache; 688 spinlock_t cache_lock; 689 int cache_size; 690 struct btrfs_stripe_hash table[]; 691 }; 692 693 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 694 695 void btrfs_init_async_reclaim_work(struct work_struct *work); 696 697 /* fs_info */ 698 struct reloc_control; 699 struct btrfs_device; 700 struct btrfs_fs_devices; 701 struct btrfs_balance_control; 702 struct btrfs_delayed_root; 703 704 #define BTRFS_FS_BARRIER 1 705 #define BTRFS_FS_CLOSING_START 2 706 #define BTRFS_FS_CLOSING_DONE 3 707 #define BTRFS_FS_LOG_RECOVERING 4 708 #define BTRFS_FS_OPEN 5 709 #define BTRFS_FS_QUOTA_ENABLED 6 710 #define BTRFS_FS_QUOTA_ENABLING 7 711 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 712 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 713 #define BTRFS_FS_BTREE_ERR 11 714 #define BTRFS_FS_LOG1_ERR 12 715 #define BTRFS_FS_LOG2_ERR 13 716 #define BTRFS_FS_QUOTA_OVERRIDE 14 717 /* Used to record internally whether fs has been frozen */ 718 #define BTRFS_FS_FROZEN 15 719 720 /* 721 * Indicate that a whole-filesystem exclusive operation is running 722 * (device replace, resize, device add/delete, balance) 723 */ 724 #define BTRFS_FS_EXCL_OP 16 725 726 struct btrfs_fs_info { 727 u8 fsid[BTRFS_FSID_SIZE]; 728 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 729 unsigned long flags; 730 struct btrfs_root *extent_root; 731 struct btrfs_root *tree_root; 732 struct btrfs_root *chunk_root; 733 struct btrfs_root *dev_root; 734 struct btrfs_root *fs_root; 735 struct btrfs_root *csum_root; 736 struct btrfs_root *quota_root; 737 struct btrfs_root *uuid_root; 738 struct btrfs_root *free_space_root; 739 740 /* the log root tree is a directory of all the other log roots */ 741 struct btrfs_root *log_root_tree; 742 743 spinlock_t fs_roots_radix_lock; 744 struct radix_tree_root fs_roots_radix; 745 746 /* block group cache stuff */ 747 spinlock_t block_group_cache_lock; 748 u64 first_logical_byte; 749 struct rb_root block_group_cache_tree; 750 751 /* keep track of unallocated space */ 752 atomic64_t free_chunk_space; 753 754 struct extent_io_tree freed_extents[2]; 755 struct extent_io_tree *pinned_extents; 756 757 /* logical->physical extent mapping */ 758 struct btrfs_mapping_tree mapping_tree; 759 760 /* 761 * block reservation for extent, checksum, root tree and 762 * delayed dir index item 763 */ 764 struct btrfs_block_rsv global_block_rsv; 765 /* block reservation for metadata operations */ 766 struct btrfs_block_rsv trans_block_rsv; 767 /* block reservation for chunk tree */ 768 struct btrfs_block_rsv chunk_block_rsv; 769 /* block reservation for delayed operations */ 770 struct btrfs_block_rsv delayed_block_rsv; 771 772 struct btrfs_block_rsv empty_block_rsv; 773 774 u64 generation; 775 u64 last_trans_committed; 776 u64 avg_delayed_ref_runtime; 777 778 /* 779 * this is updated to the current trans every time a full commit 780 * is required instead of the faster short fsync log commits 781 */ 782 u64 last_trans_log_full_commit; 783 unsigned long mount_opt; 784 /* 785 * Track requests for actions that need to be done during transaction 786 * commit (like for some mount options). 787 */ 788 unsigned long pending_changes; 789 unsigned long compress_type:4; 790 unsigned int compress_level; 791 int commit_interval; 792 /* 793 * It is a suggestive number, the read side is safe even it gets a 794 * wrong number because we will write out the data into a regular 795 * extent. The write side(mount/remount) is under ->s_umount lock, 796 * so it is also safe. 797 */ 798 u64 max_inline; 799 800 struct btrfs_transaction *running_transaction; 801 wait_queue_head_t transaction_throttle; 802 wait_queue_head_t transaction_wait; 803 wait_queue_head_t transaction_blocked_wait; 804 wait_queue_head_t async_submit_wait; 805 806 /* 807 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 808 * when they are updated. 809 * 810 * Because we do not clear the flags for ever, so we needn't use 811 * the lock on the read side. 812 * 813 * We also needn't use the lock when we mount the fs, because 814 * there is no other task which will update the flag. 815 */ 816 spinlock_t super_lock; 817 struct btrfs_super_block *super_copy; 818 struct btrfs_super_block *super_for_commit; 819 struct super_block *sb; 820 struct inode *btree_inode; 821 struct mutex tree_log_mutex; 822 struct mutex transaction_kthread_mutex; 823 struct mutex cleaner_mutex; 824 struct mutex chunk_mutex; 825 struct mutex volume_mutex; 826 827 /* 828 * this is taken to make sure we don't set block groups ro after 829 * the free space cache has been allocated on them 830 */ 831 struct mutex ro_block_group_mutex; 832 833 /* this is used during read/modify/write to make sure 834 * no two ios are trying to mod the same stripe at the same 835 * time 836 */ 837 struct btrfs_stripe_hash_table *stripe_hash_table; 838 839 /* 840 * this protects the ordered operations list only while we are 841 * processing all of the entries on it. This way we make 842 * sure the commit code doesn't find the list temporarily empty 843 * because another function happens to be doing non-waiting preflush 844 * before jumping into the main commit. 845 */ 846 struct mutex ordered_operations_mutex; 847 848 struct rw_semaphore commit_root_sem; 849 850 struct rw_semaphore cleanup_work_sem; 851 852 struct rw_semaphore subvol_sem; 853 struct srcu_struct subvol_srcu; 854 855 spinlock_t trans_lock; 856 /* 857 * the reloc mutex goes with the trans lock, it is taken 858 * during commit to protect us from the relocation code 859 */ 860 struct mutex reloc_mutex; 861 862 struct list_head trans_list; 863 struct list_head dead_roots; 864 struct list_head caching_block_groups; 865 866 spinlock_t delayed_iput_lock; 867 struct list_head delayed_iputs; 868 struct mutex cleaner_delayed_iput_mutex; 869 870 /* this protects tree_mod_seq_list */ 871 spinlock_t tree_mod_seq_lock; 872 atomic64_t tree_mod_seq; 873 struct list_head tree_mod_seq_list; 874 875 /* this protects tree_mod_log */ 876 rwlock_t tree_mod_log_lock; 877 struct rb_root tree_mod_log; 878 879 atomic_t async_delalloc_pages; 880 atomic_t open_ioctl_trans; 881 882 /* 883 * this is used to protect the following list -- ordered_roots. 884 */ 885 spinlock_t ordered_root_lock; 886 887 /* 888 * all fs/file tree roots in which there are data=ordered extents 889 * pending writeback are added into this list. 890 * 891 * these can span multiple transactions and basically include 892 * every dirty data page that isn't from nodatacow 893 */ 894 struct list_head ordered_roots; 895 896 struct mutex delalloc_root_mutex; 897 spinlock_t delalloc_root_lock; 898 /* all fs/file tree roots that have delalloc inodes. */ 899 struct list_head delalloc_roots; 900 901 /* 902 * there is a pool of worker threads for checksumming during writes 903 * and a pool for checksumming after reads. This is because readers 904 * can run with FS locks held, and the writers may be waiting for 905 * those locks. We don't want ordering in the pending list to cause 906 * deadlocks, and so the two are serviced separately. 907 * 908 * A third pool does submit_bio to avoid deadlocking with the other 909 * two 910 */ 911 struct btrfs_workqueue *workers; 912 struct btrfs_workqueue *delalloc_workers; 913 struct btrfs_workqueue *flush_workers; 914 struct btrfs_workqueue *endio_workers; 915 struct btrfs_workqueue *endio_meta_workers; 916 struct btrfs_workqueue *endio_raid56_workers; 917 struct btrfs_workqueue *endio_repair_workers; 918 struct btrfs_workqueue *rmw_workers; 919 struct btrfs_workqueue *endio_meta_write_workers; 920 struct btrfs_workqueue *endio_write_workers; 921 struct btrfs_workqueue *endio_freespace_worker; 922 struct btrfs_workqueue *submit_workers; 923 struct btrfs_workqueue *caching_workers; 924 struct btrfs_workqueue *readahead_workers; 925 926 /* 927 * fixup workers take dirty pages that didn't properly go through 928 * the cow mechanism and make them safe to write. It happens 929 * for the sys_munmap function call path 930 */ 931 struct btrfs_workqueue *fixup_workers; 932 struct btrfs_workqueue *delayed_workers; 933 934 /* the extent workers do delayed refs on the extent allocation tree */ 935 struct btrfs_workqueue *extent_workers; 936 struct task_struct *transaction_kthread; 937 struct task_struct *cleaner_kthread; 938 int thread_pool_size; 939 940 struct kobject *space_info_kobj; 941 942 u64 total_pinned; 943 944 /* used to keep from writing metadata until there is a nice batch */ 945 struct percpu_counter dirty_metadata_bytes; 946 struct percpu_counter delalloc_bytes; 947 s32 dirty_metadata_batch; 948 s32 delalloc_batch; 949 950 struct list_head dirty_cowonly_roots; 951 952 struct btrfs_fs_devices *fs_devices; 953 954 /* 955 * the space_info list is almost entirely read only. It only changes 956 * when we add a new raid type to the FS, and that happens 957 * very rarely. RCU is used to protect it. 958 */ 959 struct list_head space_info; 960 961 struct btrfs_space_info *data_sinfo; 962 963 struct reloc_control *reloc_ctl; 964 965 /* data_alloc_cluster is only used in ssd_spread mode */ 966 struct btrfs_free_cluster data_alloc_cluster; 967 968 /* all metadata allocations go through this cluster */ 969 struct btrfs_free_cluster meta_alloc_cluster; 970 971 /* auto defrag inodes go here */ 972 spinlock_t defrag_inodes_lock; 973 struct rb_root defrag_inodes; 974 atomic_t defrag_running; 975 976 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 977 seqlock_t profiles_lock; 978 /* 979 * these three are in extended format (availability of single 980 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 981 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 982 */ 983 u64 avail_data_alloc_bits; 984 u64 avail_metadata_alloc_bits; 985 u64 avail_system_alloc_bits; 986 987 /* restriper state */ 988 spinlock_t balance_lock; 989 struct mutex balance_mutex; 990 atomic_t balance_running; 991 atomic_t balance_pause_req; 992 atomic_t balance_cancel_req; 993 struct btrfs_balance_control *balance_ctl; 994 wait_queue_head_t balance_wait_q; 995 996 unsigned data_chunk_allocations; 997 unsigned metadata_ratio; 998 999 void *bdev_holder; 1000 1001 /* private scrub information */ 1002 struct mutex scrub_lock; 1003 atomic_t scrubs_running; 1004 atomic_t scrub_pause_req; 1005 atomic_t scrubs_paused; 1006 atomic_t scrub_cancel_req; 1007 wait_queue_head_t scrub_pause_wait; 1008 int scrub_workers_refcnt; 1009 struct btrfs_workqueue *scrub_workers; 1010 struct btrfs_workqueue *scrub_wr_completion_workers; 1011 struct btrfs_workqueue *scrub_nocow_workers; 1012 struct btrfs_workqueue *scrub_parity_workers; 1013 1014 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1015 u32 check_integrity_print_mask; 1016 #endif 1017 /* is qgroup tracking in a consistent state? */ 1018 u64 qgroup_flags; 1019 1020 /* holds configuration and tracking. Protected by qgroup_lock */ 1021 struct rb_root qgroup_tree; 1022 struct rb_root qgroup_op_tree; 1023 spinlock_t qgroup_lock; 1024 spinlock_t qgroup_op_lock; 1025 atomic_t qgroup_op_seq; 1026 1027 /* 1028 * used to avoid frequently calling ulist_alloc()/ulist_free() 1029 * when doing qgroup accounting, it must be protected by qgroup_lock. 1030 */ 1031 struct ulist *qgroup_ulist; 1032 1033 /* protect user change for quota operations */ 1034 struct mutex qgroup_ioctl_lock; 1035 1036 /* list of dirty qgroups to be written at next commit */ 1037 struct list_head dirty_qgroups; 1038 1039 /* used by qgroup for an efficient tree traversal */ 1040 u64 qgroup_seq; 1041 1042 /* qgroup rescan items */ 1043 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1044 struct btrfs_key qgroup_rescan_progress; 1045 struct btrfs_workqueue *qgroup_rescan_workers; 1046 struct completion qgroup_rescan_completion; 1047 struct btrfs_work qgroup_rescan_work; 1048 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1049 1050 /* filesystem state */ 1051 unsigned long fs_state; 1052 1053 struct btrfs_delayed_root *delayed_root; 1054 1055 /* readahead tree */ 1056 spinlock_t reada_lock; 1057 struct radix_tree_root reada_tree; 1058 1059 /* readahead works cnt */ 1060 atomic_t reada_works_cnt; 1061 1062 /* Extent buffer radix tree */ 1063 spinlock_t buffer_lock; 1064 struct radix_tree_root buffer_radix; 1065 1066 /* next backup root to be overwritten */ 1067 int backup_root_index; 1068 1069 /* device replace state */ 1070 struct btrfs_dev_replace dev_replace; 1071 1072 struct percpu_counter bio_counter; 1073 wait_queue_head_t replace_wait; 1074 1075 struct semaphore uuid_tree_rescan_sem; 1076 1077 /* Used to reclaim the metadata space in the background. */ 1078 struct work_struct async_reclaim_work; 1079 1080 spinlock_t unused_bgs_lock; 1081 struct list_head unused_bgs; 1082 struct mutex unused_bg_unpin_mutex; 1083 struct mutex delete_unused_bgs_mutex; 1084 1085 /* For btrfs to record security options */ 1086 struct security_mnt_opts security_opts; 1087 1088 /* 1089 * Chunks that can't be freed yet (under a trim/discard operation) 1090 * and will be latter freed. Protected by fs_info->chunk_mutex. 1091 */ 1092 struct list_head pinned_chunks; 1093 1094 /* Cached block sizes */ 1095 u32 nodesize; 1096 u32 sectorsize; 1097 u32 stripesize; 1098 1099 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1100 spinlock_t ref_verify_lock; 1101 struct rb_root block_tree; 1102 #endif 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 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1342 1343 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1344 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1345 1346 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1347 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1348 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1349 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1350 BTRFS_MOUNT_##opt) 1351 1352 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1353 { \ 1354 if (!btrfs_test_opt(fs_info, opt)) \ 1355 btrfs_info(fs_info, fmt, ##args); \ 1356 btrfs_set_opt(fs_info->mount_opt, opt); \ 1357 } 1358 1359 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1360 { \ 1361 if (btrfs_test_opt(fs_info, opt)) \ 1362 btrfs_info(fs_info, fmt, ##args); \ 1363 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1364 } 1365 1366 #ifdef CONFIG_BTRFS_DEBUG 1367 static inline int 1368 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1369 { 1370 struct btrfs_fs_info *fs_info = block_group->fs_info; 1371 1372 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1373 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1374 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1375 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1376 } 1377 #endif 1378 1379 /* 1380 * Requests for changes that need to be done during transaction commit. 1381 * 1382 * Internal mount options that are used for special handling of the real 1383 * mount options (eg. cannot be set during remount and have to be set during 1384 * transaction commit) 1385 */ 1386 1387 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1388 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1389 #define BTRFS_PENDING_COMMIT (2) 1390 1391 #define btrfs_test_pending(info, opt) \ 1392 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1393 #define btrfs_set_pending(info, opt) \ 1394 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1395 #define btrfs_clear_pending(info, opt) \ 1396 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1397 1398 /* 1399 * Helpers for setting pending mount option changes. 1400 * 1401 * Expects corresponding macros 1402 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1403 */ 1404 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1405 do { \ 1406 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1407 btrfs_info((info), fmt, ##args); \ 1408 btrfs_set_pending((info), SET_##opt); \ 1409 btrfs_clear_pending((info), CLEAR_##opt); \ 1410 } \ 1411 } while(0) 1412 1413 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1414 do { \ 1415 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1416 btrfs_info((info), fmt, ##args); \ 1417 btrfs_set_pending((info), CLEAR_##opt); \ 1418 btrfs_clear_pending((info), SET_##opt); \ 1419 } \ 1420 } while(0) 1421 1422 /* 1423 * Inode flags 1424 */ 1425 #define BTRFS_INODE_NODATASUM (1 << 0) 1426 #define BTRFS_INODE_NODATACOW (1 << 1) 1427 #define BTRFS_INODE_READONLY (1 << 2) 1428 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1429 #define BTRFS_INODE_PREALLOC (1 << 4) 1430 #define BTRFS_INODE_SYNC (1 << 5) 1431 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1432 #define BTRFS_INODE_APPEND (1 << 7) 1433 #define BTRFS_INODE_NODUMP (1 << 8) 1434 #define BTRFS_INODE_NOATIME (1 << 9) 1435 #define BTRFS_INODE_DIRSYNC (1 << 10) 1436 #define BTRFS_INODE_COMPRESS (1 << 11) 1437 1438 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1439 1440 struct btrfs_map_token { 1441 const struct extent_buffer *eb; 1442 char *kaddr; 1443 unsigned long offset; 1444 }; 1445 1446 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1447 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1448 1449 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1450 { 1451 token->kaddr = NULL; 1452 } 1453 1454 /* some macros to generate set/get functions for the struct fields. This 1455 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1456 * one for u8: 1457 */ 1458 #define le8_to_cpu(v) (v) 1459 #define cpu_to_le8(v) (v) 1460 #define __le8 u8 1461 1462 #define read_eb_member(eb, ptr, type, member, result) (\ 1463 read_extent_buffer(eb, (char *)(result), \ 1464 ((unsigned long)(ptr)) + \ 1465 offsetof(type, member), \ 1466 sizeof(((type *)0)->member))) 1467 1468 #define write_eb_member(eb, ptr, type, member, result) (\ 1469 write_extent_buffer(eb, (char *)(result), \ 1470 ((unsigned long)(ptr)) + \ 1471 offsetof(type, member), \ 1472 sizeof(((type *)0)->member))) 1473 1474 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1475 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1476 const void *ptr, unsigned long off, \ 1477 struct btrfs_map_token *token); \ 1478 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1479 unsigned long off, u##bits val, \ 1480 struct btrfs_map_token *token); \ 1481 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1482 const void *ptr, \ 1483 unsigned long off) \ 1484 { \ 1485 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1486 } \ 1487 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1488 unsigned long off, u##bits val) \ 1489 { \ 1490 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1491 } 1492 1493 DECLARE_BTRFS_SETGET_BITS(8) 1494 DECLARE_BTRFS_SETGET_BITS(16) 1495 DECLARE_BTRFS_SETGET_BITS(32) 1496 DECLARE_BTRFS_SETGET_BITS(64) 1497 1498 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1499 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1500 const type *s) \ 1501 { \ 1502 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1503 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1504 } \ 1505 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1506 u##bits val) \ 1507 { \ 1508 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1509 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1510 } \ 1511 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1512 const type *s, \ 1513 struct btrfs_map_token *token) \ 1514 { \ 1515 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1516 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1517 } \ 1518 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1519 type *s, u##bits val, \ 1520 struct btrfs_map_token *token) \ 1521 { \ 1522 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1523 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1524 } 1525 1526 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1527 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1528 { \ 1529 const type *p = page_address(eb->pages[0]); \ 1530 u##bits res = le##bits##_to_cpu(p->member); \ 1531 return res; \ 1532 } \ 1533 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1534 u##bits val) \ 1535 { \ 1536 type *p = page_address(eb->pages[0]); \ 1537 p->member = cpu_to_le##bits(val); \ 1538 } 1539 1540 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1541 static inline u##bits btrfs_##name(const type *s) \ 1542 { \ 1543 return le##bits##_to_cpu(s->member); \ 1544 } \ 1545 static inline void btrfs_set_##name(type *s, u##bits val) \ 1546 { \ 1547 s->member = cpu_to_le##bits(val); \ 1548 } 1549 1550 1551 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1552 struct btrfs_dev_item *s) 1553 { 1554 BUILD_BUG_ON(sizeof(u64) != 1555 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1556 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1557 total_bytes)); 1558 } 1559 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1560 struct btrfs_dev_item *s, 1561 u64 val) 1562 { 1563 BUILD_BUG_ON(sizeof(u64) != 1564 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1565 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1566 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1567 } 1568 1569 1570 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1571 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1572 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1573 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1574 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1575 start_offset, 64); 1576 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1577 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1578 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1579 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1580 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1581 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1582 1583 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1584 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1585 total_bytes, 64); 1586 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1587 bytes_used, 64); 1588 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1589 io_align, 32); 1590 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1591 io_width, 32); 1592 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1593 sector_size, 32); 1594 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1595 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1596 dev_group, 32); 1597 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1598 seek_speed, 8); 1599 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1600 bandwidth, 8); 1601 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1602 generation, 64); 1603 1604 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1605 { 1606 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1607 } 1608 1609 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1610 { 1611 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1612 } 1613 1614 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1615 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1616 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1617 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1618 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1619 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1620 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1621 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1622 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1623 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1624 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1625 1626 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1627 { 1628 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1629 } 1630 1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1632 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1633 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1634 stripe_len, 64); 1635 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1636 io_align, 32); 1637 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1638 io_width, 32); 1639 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1640 sector_size, 32); 1641 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1642 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1643 num_stripes, 16); 1644 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1645 sub_stripes, 16); 1646 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1647 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1648 1649 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1650 int nr) 1651 { 1652 unsigned long offset = (unsigned long)c; 1653 offset += offsetof(struct btrfs_chunk, stripe); 1654 offset += nr * sizeof(struct btrfs_stripe); 1655 return (struct btrfs_stripe *)offset; 1656 } 1657 1658 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1659 { 1660 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1661 } 1662 1663 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1664 struct btrfs_chunk *c, int nr) 1665 { 1666 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1667 } 1668 1669 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1670 struct btrfs_chunk *c, int nr) 1671 { 1672 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1673 } 1674 1675 /* struct btrfs_block_group_item */ 1676 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1677 used, 64); 1678 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1679 used, 64); 1680 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1681 struct btrfs_block_group_item, chunk_objectid, 64); 1682 1683 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1684 struct btrfs_block_group_item, chunk_objectid, 64); 1685 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1686 struct btrfs_block_group_item, flags, 64); 1687 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1688 struct btrfs_block_group_item, flags, 64); 1689 1690 /* struct btrfs_free_space_info */ 1691 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1692 extent_count, 32); 1693 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1694 1695 /* struct btrfs_inode_ref */ 1696 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1697 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1698 1699 /* struct btrfs_inode_extref */ 1700 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1701 parent_objectid, 64); 1702 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1703 name_len, 16); 1704 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1705 1706 /* struct btrfs_inode_item */ 1707 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1708 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1709 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1710 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1711 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1712 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1713 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1714 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1715 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1716 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1717 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1718 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1719 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1720 generation, 64); 1721 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1722 sequence, 64); 1723 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1724 transid, 64); 1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1726 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1727 nbytes, 64); 1728 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1729 block_group, 64); 1730 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1735 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1736 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1737 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1738 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1739 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1740 1741 /* struct btrfs_dev_extent */ 1742 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1743 chunk_tree, 64); 1744 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1745 chunk_objectid, 64); 1746 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1747 chunk_offset, 64); 1748 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1749 1750 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1751 { 1752 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1753 return (unsigned long)dev + ptr; 1754 } 1755 1756 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1757 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1758 generation, 64); 1759 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1760 1761 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1762 1763 1764 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1765 1766 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1767 struct btrfs_tree_block_info *item, 1768 struct btrfs_disk_key *key) 1769 { 1770 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1771 } 1772 1773 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1774 struct btrfs_tree_block_info *item, 1775 struct btrfs_disk_key *key) 1776 { 1777 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1778 } 1779 1780 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1781 root, 64); 1782 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1783 objectid, 64); 1784 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1785 offset, 64); 1786 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1787 count, 32); 1788 1789 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1790 count, 32); 1791 1792 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1793 type, 8); 1794 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1795 offset, 64); 1796 1797 static inline u32 btrfs_extent_inline_ref_size(int type) 1798 { 1799 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1800 type == BTRFS_SHARED_BLOCK_REF_KEY) 1801 return sizeof(struct btrfs_extent_inline_ref); 1802 if (type == BTRFS_SHARED_DATA_REF_KEY) 1803 return sizeof(struct btrfs_shared_data_ref) + 1804 sizeof(struct btrfs_extent_inline_ref); 1805 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1806 return sizeof(struct btrfs_extent_data_ref) + 1807 offsetof(struct btrfs_extent_inline_ref, offset); 1808 return 0; 1809 } 1810 1811 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1812 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1813 generation, 64); 1814 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1815 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1816 1817 /* struct btrfs_node */ 1818 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1819 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1820 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1821 blockptr, 64); 1822 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1823 generation, 64); 1824 1825 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1826 { 1827 unsigned long ptr; 1828 ptr = offsetof(struct btrfs_node, ptrs) + 1829 sizeof(struct btrfs_key_ptr) * nr; 1830 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1831 } 1832 1833 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1834 int nr, u64 val) 1835 { 1836 unsigned long ptr; 1837 ptr = offsetof(struct btrfs_node, ptrs) + 1838 sizeof(struct btrfs_key_ptr) * nr; 1839 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1840 } 1841 1842 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1843 { 1844 unsigned long ptr; 1845 ptr = offsetof(struct btrfs_node, ptrs) + 1846 sizeof(struct btrfs_key_ptr) * nr; 1847 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1848 } 1849 1850 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1851 int nr, u64 val) 1852 { 1853 unsigned long ptr; 1854 ptr = offsetof(struct btrfs_node, ptrs) + 1855 sizeof(struct btrfs_key_ptr) * nr; 1856 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1857 } 1858 1859 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1860 { 1861 return offsetof(struct btrfs_node, ptrs) + 1862 sizeof(struct btrfs_key_ptr) * nr; 1863 } 1864 1865 void btrfs_node_key(const struct extent_buffer *eb, 1866 struct btrfs_disk_key *disk_key, int nr); 1867 1868 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1869 struct btrfs_disk_key *disk_key, int nr) 1870 { 1871 unsigned long ptr; 1872 ptr = btrfs_node_key_ptr_offset(nr); 1873 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1874 struct btrfs_key_ptr, key, disk_key); 1875 } 1876 1877 /* struct btrfs_item */ 1878 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1879 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1880 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1881 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1882 1883 static inline unsigned long btrfs_item_nr_offset(int nr) 1884 { 1885 return offsetof(struct btrfs_leaf, items) + 1886 sizeof(struct btrfs_item) * nr; 1887 } 1888 1889 static inline struct btrfs_item *btrfs_item_nr(int nr) 1890 { 1891 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1892 } 1893 1894 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1895 struct btrfs_item *item) 1896 { 1897 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1898 } 1899 1900 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1901 { 1902 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1903 } 1904 1905 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1906 { 1907 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1908 } 1909 1910 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1911 { 1912 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1913 } 1914 1915 static inline void btrfs_item_key(const struct extent_buffer *eb, 1916 struct btrfs_disk_key *disk_key, int nr) 1917 { 1918 struct btrfs_item *item = btrfs_item_nr(nr); 1919 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1920 } 1921 1922 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1923 struct btrfs_disk_key *disk_key, int nr) 1924 { 1925 struct btrfs_item *item = btrfs_item_nr(nr); 1926 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1927 } 1928 1929 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1930 1931 /* 1932 * struct btrfs_root_ref 1933 */ 1934 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1935 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1936 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1937 1938 /* struct btrfs_dir_item */ 1939 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1940 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1941 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1942 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1943 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1944 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1945 data_len, 16); 1946 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1947 name_len, 16); 1948 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1949 transid, 64); 1950 1951 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1952 const struct btrfs_dir_item *item, 1953 struct btrfs_disk_key *key) 1954 { 1955 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1956 } 1957 1958 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1959 struct btrfs_dir_item *item, 1960 const struct btrfs_disk_key *key) 1961 { 1962 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1963 } 1964 1965 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1966 num_entries, 64); 1967 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1968 num_bitmaps, 64); 1969 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1970 generation, 64); 1971 1972 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1973 const struct btrfs_free_space_header *h, 1974 struct btrfs_disk_key *key) 1975 { 1976 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1977 } 1978 1979 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1980 struct btrfs_free_space_header *h, 1981 const struct btrfs_disk_key *key) 1982 { 1983 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1984 } 1985 1986 /* struct btrfs_disk_key */ 1987 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1988 objectid, 64); 1989 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1990 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1991 1992 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1993 const struct btrfs_disk_key *disk) 1994 { 1995 cpu->offset = le64_to_cpu(disk->offset); 1996 cpu->type = disk->type; 1997 cpu->objectid = le64_to_cpu(disk->objectid); 1998 } 1999 2000 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2001 const struct btrfs_key *cpu) 2002 { 2003 disk->offset = cpu_to_le64(cpu->offset); 2004 disk->type = cpu->type; 2005 disk->objectid = cpu_to_le64(cpu->objectid); 2006 } 2007 2008 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2009 struct btrfs_key *key, int nr) 2010 { 2011 struct btrfs_disk_key disk_key; 2012 btrfs_node_key(eb, &disk_key, nr); 2013 btrfs_disk_key_to_cpu(key, &disk_key); 2014 } 2015 2016 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2017 struct btrfs_key *key, int nr) 2018 { 2019 struct btrfs_disk_key disk_key; 2020 btrfs_item_key(eb, &disk_key, nr); 2021 btrfs_disk_key_to_cpu(key, &disk_key); 2022 } 2023 2024 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2025 const struct btrfs_dir_item *item, 2026 struct btrfs_key *key) 2027 { 2028 struct btrfs_disk_key disk_key; 2029 btrfs_dir_item_key(eb, item, &disk_key); 2030 btrfs_disk_key_to_cpu(key, &disk_key); 2031 } 2032 2033 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2034 { 2035 return key->type; 2036 } 2037 2038 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2039 { 2040 key->type = val; 2041 } 2042 2043 /* struct btrfs_header */ 2044 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2045 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2046 generation, 64); 2047 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2048 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2049 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2050 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2051 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2052 generation, 64); 2053 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2054 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2055 nritems, 32); 2056 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2057 2058 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2059 { 2060 return (btrfs_header_flags(eb) & flag) == flag; 2061 } 2062 2063 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2064 { 2065 u64 flags = btrfs_header_flags(eb); 2066 btrfs_set_header_flags(eb, flags | flag); 2067 return (flags & flag) == flag; 2068 } 2069 2070 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2071 { 2072 u64 flags = btrfs_header_flags(eb); 2073 btrfs_set_header_flags(eb, flags & ~flag); 2074 return (flags & flag) == flag; 2075 } 2076 2077 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2078 { 2079 u64 flags = btrfs_header_flags(eb); 2080 return flags >> BTRFS_BACKREF_REV_SHIFT; 2081 } 2082 2083 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2084 int rev) 2085 { 2086 u64 flags = btrfs_header_flags(eb); 2087 flags &= ~BTRFS_BACKREF_REV_MASK; 2088 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2089 btrfs_set_header_flags(eb, flags); 2090 } 2091 2092 static inline unsigned long btrfs_header_fsid(void) 2093 { 2094 return offsetof(struct btrfs_header, fsid); 2095 } 2096 2097 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2098 { 2099 return offsetof(struct btrfs_header, chunk_tree_uuid); 2100 } 2101 2102 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2103 { 2104 return btrfs_header_level(eb) == 0; 2105 } 2106 2107 /* struct btrfs_root_item */ 2108 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2109 generation, 64); 2110 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2111 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2112 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2113 2114 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2115 generation, 64); 2116 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2117 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2118 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2119 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2120 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2121 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2122 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2123 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2124 last_snapshot, 64); 2125 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2126 generation_v2, 64); 2127 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2128 ctransid, 64); 2129 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2130 otransid, 64); 2131 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2132 stransid, 64); 2133 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2134 rtransid, 64); 2135 2136 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2137 { 2138 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2139 } 2140 2141 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2142 { 2143 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2144 } 2145 2146 /* struct btrfs_root_backup */ 2147 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2148 tree_root, 64); 2149 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2150 tree_root_gen, 64); 2151 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2152 tree_root_level, 8); 2153 2154 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2155 chunk_root, 64); 2156 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2157 chunk_root_gen, 64); 2158 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2159 chunk_root_level, 8); 2160 2161 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2162 extent_root, 64); 2163 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2164 extent_root_gen, 64); 2165 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2166 extent_root_level, 8); 2167 2168 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2169 fs_root, 64); 2170 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2171 fs_root_gen, 64); 2172 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2173 fs_root_level, 8); 2174 2175 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2176 dev_root, 64); 2177 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2178 dev_root_gen, 64); 2179 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2180 dev_root_level, 8); 2181 2182 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2183 csum_root, 64); 2184 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2185 csum_root_gen, 64); 2186 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2187 csum_root_level, 8); 2188 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2189 total_bytes, 64); 2190 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2191 bytes_used, 64); 2192 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2193 num_devices, 64); 2194 2195 /* struct btrfs_balance_item */ 2196 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2197 2198 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2199 const struct btrfs_balance_item *bi, 2200 struct btrfs_disk_balance_args *ba) 2201 { 2202 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2203 } 2204 2205 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2206 struct btrfs_balance_item *bi, 2207 const struct btrfs_disk_balance_args *ba) 2208 { 2209 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2210 } 2211 2212 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2213 const struct btrfs_balance_item *bi, 2214 struct btrfs_disk_balance_args *ba) 2215 { 2216 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2217 } 2218 2219 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2220 struct btrfs_balance_item *bi, 2221 const struct btrfs_disk_balance_args *ba) 2222 { 2223 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2224 } 2225 2226 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2227 const struct btrfs_balance_item *bi, 2228 struct btrfs_disk_balance_args *ba) 2229 { 2230 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2231 } 2232 2233 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2234 struct btrfs_balance_item *bi, 2235 const struct btrfs_disk_balance_args *ba) 2236 { 2237 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2238 } 2239 2240 static inline void 2241 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2242 const struct btrfs_disk_balance_args *disk) 2243 { 2244 memset(cpu, 0, sizeof(*cpu)); 2245 2246 cpu->profiles = le64_to_cpu(disk->profiles); 2247 cpu->usage = le64_to_cpu(disk->usage); 2248 cpu->devid = le64_to_cpu(disk->devid); 2249 cpu->pstart = le64_to_cpu(disk->pstart); 2250 cpu->pend = le64_to_cpu(disk->pend); 2251 cpu->vstart = le64_to_cpu(disk->vstart); 2252 cpu->vend = le64_to_cpu(disk->vend); 2253 cpu->target = le64_to_cpu(disk->target); 2254 cpu->flags = le64_to_cpu(disk->flags); 2255 cpu->limit = le64_to_cpu(disk->limit); 2256 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2257 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2258 } 2259 2260 static inline void 2261 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2262 const struct btrfs_balance_args *cpu) 2263 { 2264 memset(disk, 0, sizeof(*disk)); 2265 2266 disk->profiles = cpu_to_le64(cpu->profiles); 2267 disk->usage = cpu_to_le64(cpu->usage); 2268 disk->devid = cpu_to_le64(cpu->devid); 2269 disk->pstart = cpu_to_le64(cpu->pstart); 2270 disk->pend = cpu_to_le64(cpu->pend); 2271 disk->vstart = cpu_to_le64(cpu->vstart); 2272 disk->vend = cpu_to_le64(cpu->vend); 2273 disk->target = cpu_to_le64(cpu->target); 2274 disk->flags = cpu_to_le64(cpu->flags); 2275 disk->limit = cpu_to_le64(cpu->limit); 2276 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2277 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2278 } 2279 2280 /* struct btrfs_super_block */ 2281 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2282 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2283 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2284 generation, 64); 2285 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2286 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2287 struct btrfs_super_block, sys_chunk_array_size, 32); 2288 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2289 struct btrfs_super_block, chunk_root_generation, 64); 2290 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2291 root_level, 8); 2292 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2293 chunk_root, 64); 2294 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2295 chunk_root_level, 8); 2296 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2297 log_root, 64); 2298 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2299 log_root_transid, 64); 2300 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2301 log_root_level, 8); 2302 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2303 total_bytes, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2305 bytes_used, 64); 2306 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2307 sectorsize, 32); 2308 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2309 nodesize, 32); 2310 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2311 stripesize, 32); 2312 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2313 root_dir_objectid, 64); 2314 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2315 num_devices, 64); 2316 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2317 compat_flags, 64); 2318 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2319 compat_ro_flags, 64); 2320 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2321 incompat_flags, 64); 2322 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2323 csum_type, 16); 2324 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2325 cache_generation, 64); 2326 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2327 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2328 uuid_tree_generation, 64); 2329 2330 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2331 { 2332 u16 t = btrfs_super_csum_type(s); 2333 /* 2334 * csum type is validated at mount time 2335 */ 2336 return btrfs_csum_sizes[t]; 2337 } 2338 2339 2340 /* 2341 * The leaf data grows from end-to-front in the node. 2342 * this returns the address of the start of the last item, 2343 * which is the stop of the leaf data stack 2344 */ 2345 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2346 const struct extent_buffer *leaf) 2347 { 2348 u32 nr = btrfs_header_nritems(leaf); 2349 2350 if (nr == 0) 2351 return BTRFS_LEAF_DATA_SIZE(fs_info); 2352 return btrfs_item_offset_nr(leaf, nr - 1); 2353 } 2354 2355 /* struct btrfs_file_extent_item */ 2356 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2357 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2358 struct btrfs_file_extent_item, disk_bytenr, 64); 2359 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2360 struct btrfs_file_extent_item, offset, 64); 2361 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2362 struct btrfs_file_extent_item, generation, 64); 2363 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2364 struct btrfs_file_extent_item, num_bytes, 64); 2365 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2366 struct btrfs_file_extent_item, disk_num_bytes, 64); 2367 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2368 struct btrfs_file_extent_item, compression, 8); 2369 2370 static inline unsigned long 2371 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2372 { 2373 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2374 } 2375 2376 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2377 { 2378 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2379 } 2380 2381 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2382 disk_bytenr, 64); 2383 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2384 generation, 64); 2385 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2386 disk_num_bytes, 64); 2387 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2388 offset, 64); 2389 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2390 num_bytes, 64); 2391 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2392 ram_bytes, 64); 2393 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2394 compression, 8); 2395 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2396 encryption, 8); 2397 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2398 other_encoding, 16); 2399 2400 /* 2401 * this returns the number of bytes used by the item on disk, minus the 2402 * size of any extent headers. If a file is compressed on disk, this is 2403 * the compressed size 2404 */ 2405 static inline u32 btrfs_file_extent_inline_item_len( 2406 const struct extent_buffer *eb, 2407 struct btrfs_item *e) 2408 { 2409 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2410 } 2411 2412 /* this returns the number of file bytes represented by the inline item. 2413 * If an item is compressed, this is the uncompressed size 2414 */ 2415 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb, 2416 int slot, 2417 const struct btrfs_file_extent_item *fi) 2418 { 2419 struct btrfs_map_token token; 2420 2421 btrfs_init_map_token(&token); 2422 /* 2423 * return the space used on disk if this item isn't 2424 * compressed or encoded 2425 */ 2426 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2427 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2428 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2429 return btrfs_file_extent_inline_item_len(eb, 2430 btrfs_item_nr(slot)); 2431 } 2432 2433 /* otherwise use the ram bytes field */ 2434 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2435 } 2436 2437 2438 /* btrfs_dev_stats_item */ 2439 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2440 const struct btrfs_dev_stats_item *ptr, 2441 int index) 2442 { 2443 u64 val; 2444 2445 read_extent_buffer(eb, &val, 2446 offsetof(struct btrfs_dev_stats_item, values) + 2447 ((unsigned long)ptr) + (index * sizeof(u64)), 2448 sizeof(val)); 2449 return val; 2450 } 2451 2452 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2453 struct btrfs_dev_stats_item *ptr, 2454 int index, u64 val) 2455 { 2456 write_extent_buffer(eb, &val, 2457 offsetof(struct btrfs_dev_stats_item, values) + 2458 ((unsigned long)ptr) + (index * sizeof(u64)), 2459 sizeof(val)); 2460 } 2461 2462 /* btrfs_qgroup_status_item */ 2463 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2464 generation, 64); 2465 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2466 version, 64); 2467 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2468 flags, 64); 2469 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2470 rescan, 64); 2471 2472 /* btrfs_qgroup_info_item */ 2473 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2474 generation, 64); 2475 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2476 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2477 rfer_cmpr, 64); 2478 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2479 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2480 excl_cmpr, 64); 2481 2482 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2483 struct btrfs_qgroup_info_item, generation, 64); 2484 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2485 rfer, 64); 2486 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2487 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2488 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2489 excl, 64); 2490 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2491 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2492 2493 /* btrfs_qgroup_limit_item */ 2494 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2495 flags, 64); 2496 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2497 max_rfer, 64); 2498 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2499 max_excl, 64); 2500 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2501 rsv_rfer, 64); 2502 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2503 rsv_excl, 64); 2504 2505 /* btrfs_dev_replace_item */ 2506 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2507 struct btrfs_dev_replace_item, src_devid, 64); 2508 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2509 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2510 64); 2511 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2512 replace_state, 64); 2513 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2514 time_started, 64); 2515 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2516 time_stopped, 64); 2517 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2518 num_write_errors, 64); 2519 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2520 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2521 64); 2522 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2523 cursor_left, 64); 2524 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2525 cursor_right, 64); 2526 2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2528 struct btrfs_dev_replace_item, src_devid, 64); 2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2530 struct btrfs_dev_replace_item, 2531 cont_reading_from_srcdev_mode, 64); 2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2533 struct btrfs_dev_replace_item, replace_state, 64); 2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2535 struct btrfs_dev_replace_item, time_started, 64); 2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2537 struct btrfs_dev_replace_item, time_stopped, 64); 2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2539 struct btrfs_dev_replace_item, num_write_errors, 64); 2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2541 struct btrfs_dev_replace_item, 2542 num_uncorrectable_read_errors, 64); 2543 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2544 struct btrfs_dev_replace_item, cursor_left, 64); 2545 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2546 struct btrfs_dev_replace_item, cursor_right, 64); 2547 2548 /* helper function to cast into the data area of the leaf. */ 2549 #define btrfs_item_ptr(leaf, slot, type) \ 2550 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2551 btrfs_item_offset_nr(leaf, slot))) 2552 2553 #define btrfs_item_ptr_offset(leaf, slot) \ 2554 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2555 btrfs_item_offset_nr(leaf, slot))) 2556 2557 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2558 { 2559 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2560 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2561 } 2562 2563 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2564 { 2565 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2566 } 2567 2568 /* extent-tree.c */ 2569 2570 enum btrfs_inline_ref_type { 2571 BTRFS_REF_TYPE_INVALID = 0, 2572 BTRFS_REF_TYPE_BLOCK = 1, 2573 BTRFS_REF_TYPE_DATA = 2, 2574 BTRFS_REF_TYPE_ANY = 3, 2575 }; 2576 2577 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2578 struct btrfs_extent_inline_ref *iref, 2579 enum btrfs_inline_ref_type is_data); 2580 2581 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2582 2583 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2584 unsigned num_items) 2585 { 2586 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2587 } 2588 2589 /* 2590 * Doing a truncate won't result in new nodes or leaves, just what we need for 2591 * COW. 2592 */ 2593 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2594 unsigned num_items) 2595 { 2596 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2597 } 2598 2599 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2600 struct btrfs_fs_info *fs_info); 2601 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2602 struct btrfs_fs_info *fs_info); 2603 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2604 const u64 start); 2605 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2606 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2607 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2608 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2609 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2610 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2611 struct btrfs_fs_info *fs_info, unsigned long count); 2612 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2613 unsigned long count, u64 transid, int wait); 2614 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2615 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2616 struct btrfs_fs_info *fs_info, u64 bytenr, 2617 u64 offset, int metadata, u64 *refs, u64 *flags); 2618 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2619 u64 bytenr, u64 num, int reserved); 2620 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2621 u64 bytenr, u64 num_bytes); 2622 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2623 struct extent_buffer *eb); 2624 int btrfs_cross_ref_exist(struct btrfs_root *root, 2625 u64 objectid, u64 offset, u64 bytenr); 2626 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2627 struct btrfs_fs_info *info, 2628 u64 bytenr); 2629 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2630 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2631 int get_block_group_index(struct btrfs_block_group_cache *cache); 2632 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2633 struct btrfs_root *root, 2634 u64 parent, u64 root_objectid, 2635 const struct btrfs_disk_key *key, 2636 int level, u64 hint, 2637 u64 empty_size); 2638 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2639 struct btrfs_root *root, 2640 struct extent_buffer *buf, 2641 u64 parent, int last_ref); 2642 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2643 struct btrfs_root *root, u64 owner, 2644 u64 offset, u64 ram_bytes, 2645 struct btrfs_key *ins); 2646 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2647 struct btrfs_fs_info *fs_info, 2648 u64 root_objectid, u64 owner, u64 offset, 2649 struct btrfs_key *ins); 2650 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2651 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2652 struct btrfs_key *ins, int is_data, int delalloc); 2653 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2654 struct extent_buffer *buf, int full_backref); 2655 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2656 struct extent_buffer *buf, int full_backref); 2657 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2658 struct btrfs_fs_info *fs_info, 2659 u64 bytenr, u64 num_bytes, u64 flags, 2660 int level, int is_data); 2661 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2662 struct btrfs_root *root, 2663 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2664 u64 owner, u64 offset); 2665 2666 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2667 u64 start, u64 len, int delalloc); 2668 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2669 u64 start, u64 len); 2670 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2671 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2672 struct btrfs_fs_info *fs_info); 2673 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2674 struct btrfs_root *root, 2675 u64 bytenr, u64 num_bytes, u64 parent, 2676 u64 root_objectid, u64 owner, u64 offset); 2677 2678 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, 2679 struct btrfs_fs_info *fs_info); 2680 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2681 struct btrfs_fs_info *fs_info); 2682 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2683 struct btrfs_fs_info *fs_info); 2684 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2685 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2686 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2687 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2688 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2689 struct btrfs_fs_info *fs_info, u64 bytes_used, 2690 u64 type, u64 chunk_offset, u64 size); 2691 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2692 struct btrfs_fs_info *fs_info, 2693 const u64 chunk_offset); 2694 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2695 struct btrfs_fs_info *fs_info, u64 group_start, 2696 struct extent_map *em); 2697 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2698 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2699 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2700 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, 2701 struct btrfs_fs_info *fs_info); 2702 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2703 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2704 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2705 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2706 2707 enum btrfs_reserve_flush_enum { 2708 /* If we are in the transaction, we can't flush anything.*/ 2709 BTRFS_RESERVE_NO_FLUSH, 2710 /* 2711 * Flushing delalloc may cause deadlock somewhere, in this 2712 * case, use FLUSH LIMIT 2713 */ 2714 BTRFS_RESERVE_FLUSH_LIMIT, 2715 BTRFS_RESERVE_FLUSH_ALL, 2716 }; 2717 2718 enum btrfs_flush_state { 2719 FLUSH_DELAYED_ITEMS_NR = 1, 2720 FLUSH_DELAYED_ITEMS = 2, 2721 FLUSH_DELALLOC = 3, 2722 FLUSH_DELALLOC_WAIT = 4, 2723 ALLOC_CHUNK = 5, 2724 COMMIT_TRANS = 6, 2725 }; 2726 2727 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2728 int btrfs_check_data_free_space(struct inode *inode, 2729 struct extent_changeset **reserved, u64 start, u64 len); 2730 void btrfs_free_reserved_data_space(struct inode *inode, 2731 struct extent_changeset *reserved, u64 start, u64 len); 2732 void btrfs_delalloc_release_space(struct inode *inode, 2733 struct extent_changeset *reserved, u64 start, u64 len); 2734 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2735 u64 len); 2736 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, 2737 struct btrfs_fs_info *fs_info); 2738 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2739 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2740 struct btrfs_inode *inode); 2741 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2742 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2743 struct btrfs_block_rsv *rsv, 2744 int nitems, 2745 u64 *qgroup_reserved, bool use_global_rsv); 2746 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2747 struct btrfs_block_rsv *rsv); 2748 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2749 2750 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2751 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes); 2752 int btrfs_delalloc_reserve_space(struct inode *inode, 2753 struct extent_changeset **reserved, u64 start, u64 len); 2754 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2755 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2756 unsigned short type); 2757 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2758 struct btrfs_block_rsv *rsv, 2759 unsigned short type); 2760 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2761 struct btrfs_block_rsv *rsv); 2762 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2763 int btrfs_block_rsv_add(struct btrfs_root *root, 2764 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2765 enum btrfs_reserve_flush_enum flush); 2766 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2767 int btrfs_block_rsv_refill(struct btrfs_root *root, 2768 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2769 enum btrfs_reserve_flush_enum flush); 2770 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2771 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2772 int update_size); 2773 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2774 struct btrfs_block_rsv *dest, u64 num_bytes, 2775 int min_factor); 2776 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2777 struct btrfs_block_rsv *block_rsv, 2778 u64 num_bytes); 2779 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2780 struct btrfs_block_group_cache *cache); 2781 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2782 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2783 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2784 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2785 u64 start, u64 end); 2786 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2787 u64 num_bytes, u64 *actual_bytes); 2788 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2789 struct btrfs_fs_info *fs_info, u64 type); 2790 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2791 2792 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2793 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2794 struct btrfs_fs_info *fs_info); 2795 int __get_raid_index(u64 flags); 2796 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2797 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2798 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2799 void check_system_chunk(struct btrfs_trans_handle *trans, 2800 struct btrfs_fs_info *fs_info, const u64 type); 2801 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2802 struct btrfs_fs_info *info, u64 start, u64 end); 2803 2804 /* ctree.c */ 2805 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2806 int level, int *slot); 2807 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2808 int btrfs_previous_item(struct btrfs_root *root, 2809 struct btrfs_path *path, u64 min_objectid, 2810 int type); 2811 int btrfs_previous_extent_item(struct btrfs_root *root, 2812 struct btrfs_path *path, u64 min_objectid); 2813 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2814 struct btrfs_path *path, 2815 const struct btrfs_key *new_key); 2816 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2817 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2818 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2819 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2820 struct btrfs_key *key, int lowest_level, 2821 u64 min_trans); 2822 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2823 struct btrfs_path *path, 2824 u64 min_trans); 2825 enum btrfs_compare_tree_result { 2826 BTRFS_COMPARE_TREE_NEW, 2827 BTRFS_COMPARE_TREE_DELETED, 2828 BTRFS_COMPARE_TREE_CHANGED, 2829 BTRFS_COMPARE_TREE_SAME, 2830 }; 2831 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2832 struct btrfs_path *right_path, 2833 struct btrfs_key *key, 2834 enum btrfs_compare_tree_result result, 2835 void *ctx); 2836 int btrfs_compare_trees(struct btrfs_root *left_root, 2837 struct btrfs_root *right_root, 2838 btrfs_changed_cb_t cb, void *ctx); 2839 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2840 struct btrfs_root *root, struct extent_buffer *buf, 2841 struct extent_buffer *parent, int parent_slot, 2842 struct extent_buffer **cow_ret); 2843 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2844 struct btrfs_root *root, 2845 struct extent_buffer *buf, 2846 struct extent_buffer **cow_ret, u64 new_root_objectid); 2847 int btrfs_block_can_be_shared(struct btrfs_root *root, 2848 struct extent_buffer *buf); 2849 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2850 u32 data_size); 2851 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2852 struct btrfs_path *path, u32 new_size, int from_end); 2853 int btrfs_split_item(struct btrfs_trans_handle *trans, 2854 struct btrfs_root *root, 2855 struct btrfs_path *path, 2856 const struct btrfs_key *new_key, 2857 unsigned long split_offset); 2858 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2859 struct btrfs_root *root, 2860 struct btrfs_path *path, 2861 const struct btrfs_key *new_key); 2862 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2863 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2864 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2865 const struct btrfs_key *key, struct btrfs_path *p, 2866 int ins_len, int cow); 2867 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2868 struct btrfs_path *p, u64 time_seq); 2869 int btrfs_search_slot_for_read(struct btrfs_root *root, 2870 const struct btrfs_key *key, 2871 struct btrfs_path *p, int find_higher, 2872 int return_any); 2873 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2874 struct btrfs_root *root, struct extent_buffer *parent, 2875 int start_slot, u64 *last_ret, 2876 struct btrfs_key *progress); 2877 void btrfs_release_path(struct btrfs_path *p); 2878 struct btrfs_path *btrfs_alloc_path(void); 2879 void btrfs_free_path(struct btrfs_path *p); 2880 void btrfs_set_path_blocking(struct btrfs_path *p); 2881 void btrfs_clear_path_blocking(struct btrfs_path *p, 2882 struct extent_buffer *held, int held_rw); 2883 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2884 2885 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2886 struct btrfs_path *path, int slot, int nr); 2887 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2888 struct btrfs_root *root, 2889 struct btrfs_path *path) 2890 { 2891 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2892 } 2893 2894 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2895 const struct btrfs_key *cpu_key, u32 *data_size, 2896 u32 total_data, u32 total_size, int nr); 2897 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2898 const struct btrfs_key *key, void *data, u32 data_size); 2899 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2900 struct btrfs_root *root, 2901 struct btrfs_path *path, 2902 const struct btrfs_key *cpu_key, u32 *data_size, 2903 int nr); 2904 2905 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2906 struct btrfs_root *root, 2907 struct btrfs_path *path, 2908 const struct btrfs_key *key, 2909 u32 data_size) 2910 { 2911 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2912 } 2913 2914 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2915 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2916 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2917 u64 time_seq); 2918 static inline int btrfs_next_old_item(struct btrfs_root *root, 2919 struct btrfs_path *p, u64 time_seq) 2920 { 2921 ++p->slots[0]; 2922 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2923 return btrfs_next_old_leaf(root, p, time_seq); 2924 return 0; 2925 } 2926 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2927 { 2928 return btrfs_next_old_item(root, p, 0); 2929 } 2930 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2931 struct extent_buffer *leaf); 2932 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2933 struct btrfs_block_rsv *block_rsv, 2934 int update_ref, int for_reloc); 2935 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2936 struct btrfs_root *root, 2937 struct extent_buffer *node, 2938 struct extent_buffer *parent); 2939 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2940 { 2941 /* 2942 * Do it this way so we only ever do one test_bit in the normal case. 2943 */ 2944 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2945 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2946 return 2; 2947 return 1; 2948 } 2949 return 0; 2950 } 2951 2952 /* 2953 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2954 * anything except sleeping. This function is used to check the status of 2955 * the fs. 2956 */ 2957 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2958 { 2959 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2960 } 2961 2962 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2963 { 2964 kfree(fs_info->balance_ctl); 2965 kfree(fs_info->delayed_root); 2966 kfree(fs_info->extent_root); 2967 kfree(fs_info->tree_root); 2968 kfree(fs_info->chunk_root); 2969 kfree(fs_info->dev_root); 2970 kfree(fs_info->csum_root); 2971 kfree(fs_info->quota_root); 2972 kfree(fs_info->uuid_root); 2973 kfree(fs_info->free_space_root); 2974 kfree(fs_info->super_copy); 2975 kfree(fs_info->super_for_commit); 2976 security_free_mnt_opts(&fs_info->security_opts); 2977 kfree(fs_info); 2978 } 2979 2980 /* tree mod log functions from ctree.c */ 2981 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2982 struct seq_list *elem); 2983 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2984 struct seq_list *elem); 2985 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2986 2987 /* root-item.c */ 2988 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2989 struct btrfs_fs_info *fs_info, 2990 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2991 const char *name, int name_len); 2992 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2993 struct btrfs_fs_info *fs_info, 2994 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2995 const char *name, int name_len); 2996 int btrfs_del_root(struct btrfs_trans_handle *trans, 2997 struct btrfs_fs_info *fs_info, const struct btrfs_key *key); 2998 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2999 const struct btrfs_key *key, 3000 struct btrfs_root_item *item); 3001 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3002 struct btrfs_root *root, 3003 struct btrfs_key *key, 3004 struct btrfs_root_item *item); 3005 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3006 struct btrfs_path *path, struct btrfs_root_item *root_item, 3007 struct btrfs_key *root_key); 3008 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3009 void btrfs_set_root_node(struct btrfs_root_item *item, 3010 struct extent_buffer *node); 3011 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3012 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3013 struct btrfs_root *root); 3014 3015 /* uuid-tree.c */ 3016 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 3017 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3018 u64 subid); 3019 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 3020 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3021 u64 subid); 3022 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3023 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3024 u64)); 3025 3026 /* dir-item.c */ 3027 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3028 const char *name, int name_len); 3029 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3030 struct btrfs_root *root, const char *name, 3031 int name_len, struct btrfs_inode *dir, 3032 struct btrfs_key *location, u8 type, u64 index); 3033 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3034 struct btrfs_root *root, 3035 struct btrfs_path *path, u64 dir, 3036 const char *name, int name_len, 3037 int mod); 3038 struct btrfs_dir_item * 3039 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3040 struct btrfs_root *root, 3041 struct btrfs_path *path, u64 dir, 3042 u64 objectid, const char *name, int name_len, 3043 int mod); 3044 struct btrfs_dir_item * 3045 btrfs_search_dir_index_item(struct btrfs_root *root, 3046 struct btrfs_path *path, u64 dirid, 3047 const char *name, int name_len); 3048 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3049 struct btrfs_root *root, 3050 struct btrfs_path *path, 3051 struct btrfs_dir_item *di); 3052 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3053 struct btrfs_root *root, 3054 struct btrfs_path *path, u64 objectid, 3055 const char *name, u16 name_len, 3056 const void *data, u16 data_len); 3057 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3058 struct btrfs_root *root, 3059 struct btrfs_path *path, u64 dir, 3060 const char *name, u16 name_len, 3061 int mod); 3062 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3063 struct btrfs_path *path, 3064 const char *name, 3065 int 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 unsigned int extra_bits, 3178 struct extent_state **cached_state, int dedupe); 3179 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3180 struct btrfs_root *new_root, 3181 struct btrfs_root *parent_root, 3182 u64 new_dirid); 3183 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3184 size_t size, struct bio *bio, 3185 unsigned long bio_flags); 3186 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3187 int btrfs_page_mkwrite(struct vm_fault *vmf); 3188 int btrfs_readpage(struct file *file, struct page *page); 3189 void btrfs_evict_inode(struct inode *inode); 3190 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3191 struct inode *btrfs_alloc_inode(struct super_block *sb); 3192 void btrfs_destroy_inode(struct inode *inode); 3193 int btrfs_drop_inode(struct inode *inode); 3194 int __init btrfs_init_cachep(void); 3195 void btrfs_destroy_cachep(void); 3196 long btrfs_ioctl_trans_end(struct file *file); 3197 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3198 struct btrfs_root *root, int *was_new); 3199 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3200 struct page *page, size_t pg_offset, 3201 u64 start, u64 end, int create); 3202 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3203 struct btrfs_root *root, 3204 struct inode *inode); 3205 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3206 struct btrfs_root *root, struct inode *inode); 3207 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3208 struct btrfs_inode *inode); 3209 int btrfs_orphan_cleanup(struct btrfs_root *root); 3210 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3211 struct btrfs_root *root); 3212 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3213 void btrfs_invalidate_inodes(struct btrfs_root *root); 3214 void btrfs_add_delayed_iput(struct inode *inode); 3215 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3216 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3217 u64 start, u64 num_bytes, u64 min_size, 3218 loff_t actual_len, u64 *alloc_hint); 3219 int btrfs_prealloc_file_range_trans(struct inode *inode, 3220 struct btrfs_trans_handle *trans, int mode, 3221 u64 start, u64 num_bytes, u64 min_size, 3222 loff_t actual_len, u64 *alloc_hint); 3223 extern const struct dentry_operations btrfs_dentry_operations; 3224 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3225 void btrfs_test_inode_set_ops(struct inode *inode); 3226 #endif 3227 3228 /* ioctl.c */ 3229 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3230 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3231 int btrfs_ioctl_get_supported_features(void __user *arg); 3232 void btrfs_update_iflags(struct inode *inode); 3233 int btrfs_is_empty_uuid(u8 *uuid); 3234 int btrfs_defrag_file(struct inode *inode, struct file *file, 3235 struct btrfs_ioctl_defrag_range_args *range, 3236 u64 newer_than, unsigned long max_pages); 3237 void btrfs_get_block_group_info(struct list_head *groups_list, 3238 struct btrfs_ioctl_space_info *space); 3239 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3240 struct btrfs_ioctl_balance_args *bargs); 3241 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3242 struct file *dst_file, u64 dst_loff); 3243 3244 /* file.c */ 3245 int __init btrfs_auto_defrag_init(void); 3246 void btrfs_auto_defrag_exit(void); 3247 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3248 struct btrfs_inode *inode); 3249 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3250 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3251 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3252 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3253 int skip_pinned); 3254 extern const struct file_operations btrfs_file_operations; 3255 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3256 struct btrfs_root *root, struct inode *inode, 3257 struct btrfs_path *path, u64 start, u64 end, 3258 u64 *drop_end, int drop_cache, 3259 int replace_extent, 3260 u32 extent_item_size, 3261 int *key_inserted); 3262 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3263 struct btrfs_root *root, struct inode *inode, u64 start, 3264 u64 end, int drop_cache); 3265 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3266 struct btrfs_inode *inode, u64 start, u64 end); 3267 int btrfs_release_file(struct inode *inode, struct file *file); 3268 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3269 size_t num_pages, loff_t pos, size_t write_bytes, 3270 struct extent_state **cached); 3271 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3272 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3273 struct file *file_out, loff_t pos_out, u64 len); 3274 3275 /* tree-defrag.c */ 3276 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3277 struct btrfs_root *root); 3278 3279 /* sysfs.c */ 3280 int __init btrfs_init_sysfs(void); 3281 void btrfs_exit_sysfs(void); 3282 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3283 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3284 3285 /* xattr.c */ 3286 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 3287 3288 /* super.c */ 3289 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3290 unsigned long new_flags); 3291 int btrfs_sync_fs(struct super_block *sb, int wait); 3292 3293 static inline __printf(2, 3) 3294 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3295 { 3296 } 3297 3298 #ifdef CONFIG_PRINTK 3299 __printf(2, 3) 3300 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3301 #else 3302 #define btrfs_printk(fs_info, fmt, args...) \ 3303 btrfs_no_printk(fs_info, fmt, ##args) 3304 #endif 3305 3306 #define btrfs_emerg(fs_info, fmt, args...) \ 3307 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3308 #define btrfs_alert(fs_info, fmt, args...) \ 3309 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3310 #define btrfs_crit(fs_info, fmt, args...) \ 3311 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3312 #define btrfs_err(fs_info, fmt, args...) \ 3313 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3314 #define btrfs_warn(fs_info, fmt, args...) \ 3315 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3316 #define btrfs_notice(fs_info, fmt, args...) \ 3317 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3318 #define btrfs_info(fs_info, fmt, args...) \ 3319 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3320 3321 /* 3322 * Wrappers that use printk_in_rcu 3323 */ 3324 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3326 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3327 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3328 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3329 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3330 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3331 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3332 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3333 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3334 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3335 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3336 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3337 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3338 3339 /* 3340 * Wrappers that use a ratelimited printk_in_rcu 3341 */ 3342 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3343 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3344 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3345 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3346 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3347 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3348 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3349 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3350 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3351 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3352 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3353 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3354 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3355 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3356 3357 /* 3358 * Wrappers that use a ratelimited printk 3359 */ 3360 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3361 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3362 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3363 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3364 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3365 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3366 #define btrfs_err_rl(fs_info, fmt, args...) \ 3367 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3368 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3369 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3370 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3371 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3372 #define btrfs_info_rl(fs_info, fmt, args...) \ 3373 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3374 3375 #if defined(CONFIG_DYNAMIC_DEBUG) 3376 #define btrfs_debug(fs_info, fmt, args...) \ 3377 do { \ 3378 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3379 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3380 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3381 } while (0) 3382 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3383 do { \ 3384 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3385 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3386 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3387 } while (0) 3388 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3389 do { \ 3390 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3391 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3392 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3393 ##args);\ 3394 } while (0) 3395 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3396 do { \ 3397 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3398 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3399 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3400 ##args); \ 3401 } while (0) 3402 #elif defined(DEBUG) 3403 #define btrfs_debug(fs_info, fmt, args...) \ 3404 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3405 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3406 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3407 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3408 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3409 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3410 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3411 #else 3412 #define btrfs_debug(fs_info, fmt, args...) \ 3413 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3414 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3415 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3416 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3417 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3418 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3419 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3420 #endif 3421 3422 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3423 do { \ 3424 rcu_read_lock(); \ 3425 btrfs_printk(fs_info, fmt, ##args); \ 3426 rcu_read_unlock(); \ 3427 } while (0) 3428 3429 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3430 do { \ 3431 static DEFINE_RATELIMIT_STATE(_rs, \ 3432 DEFAULT_RATELIMIT_INTERVAL, \ 3433 DEFAULT_RATELIMIT_BURST); \ 3434 if (__ratelimit(&_rs)) \ 3435 btrfs_printk(fs_info, fmt, ##args); \ 3436 } while (0) 3437 3438 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3439 do { \ 3440 rcu_read_lock(); \ 3441 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3442 rcu_read_unlock(); \ 3443 } while (0) 3444 3445 #ifdef CONFIG_BTRFS_ASSERT 3446 3447 __cold 3448 static inline void assfail(char *expr, char *file, int line) 3449 { 3450 pr_err("assertion failed: %s, file: %s, line: %d\n", 3451 expr, file, line); 3452 BUG(); 3453 } 3454 3455 #define ASSERT(expr) \ 3456 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3457 #else 3458 #define ASSERT(expr) ((void)0) 3459 #endif 3460 3461 __printf(5, 6) 3462 __cold 3463 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3464 unsigned int line, int errno, const char *fmt, ...); 3465 3466 const char *btrfs_decode_error(int errno); 3467 3468 __cold 3469 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3470 const char *function, 3471 unsigned int line, int errno); 3472 3473 /* 3474 * Call btrfs_abort_transaction as early as possible when an error condition is 3475 * detected, that way the exact line number is reported. 3476 */ 3477 #define btrfs_abort_transaction(trans, errno) \ 3478 do { \ 3479 /* Report first abort since mount */ \ 3480 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3481 &((trans)->fs_info->fs_state))) { \ 3482 if ((errno) != -EIO) { \ 3483 WARN(1, KERN_DEBUG \ 3484 "BTRFS: Transaction aborted (error %d)\n", \ 3485 (errno)); \ 3486 } else { \ 3487 btrfs_debug((trans)->fs_info, \ 3488 "Transaction aborted (error %d)", \ 3489 (errno)); \ 3490 } \ 3491 } \ 3492 __btrfs_abort_transaction((trans), __func__, \ 3493 __LINE__, (errno)); \ 3494 } while (0) 3495 3496 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3497 do { \ 3498 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3499 (errno), fmt, ##args); \ 3500 } while (0) 3501 3502 __printf(5, 6) 3503 __cold 3504 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3505 unsigned int line, int errno, const char *fmt, ...); 3506 /* 3507 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3508 * will panic(). Otherwise we BUG() here. 3509 */ 3510 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3511 do { \ 3512 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3513 BUG(); \ 3514 } while (0) 3515 3516 3517 /* compatibility and incompatibility defines */ 3518 3519 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3520 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3521 3522 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3523 u64 flag) 3524 { 3525 struct btrfs_super_block *disk_super; 3526 u64 features; 3527 3528 disk_super = fs_info->super_copy; 3529 features = btrfs_super_incompat_flags(disk_super); 3530 if (!(features & flag)) { 3531 spin_lock(&fs_info->super_lock); 3532 features = btrfs_super_incompat_flags(disk_super); 3533 if (!(features & flag)) { 3534 features |= flag; 3535 btrfs_set_super_incompat_flags(disk_super, features); 3536 btrfs_info(fs_info, "setting %llu feature flag", 3537 flag); 3538 } 3539 spin_unlock(&fs_info->super_lock); 3540 } 3541 } 3542 3543 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3544 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3545 3546 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3547 u64 flag) 3548 { 3549 struct btrfs_super_block *disk_super; 3550 u64 features; 3551 3552 disk_super = fs_info->super_copy; 3553 features = btrfs_super_incompat_flags(disk_super); 3554 if (features & flag) { 3555 spin_lock(&fs_info->super_lock); 3556 features = btrfs_super_incompat_flags(disk_super); 3557 if (features & flag) { 3558 features &= ~flag; 3559 btrfs_set_super_incompat_flags(disk_super, features); 3560 btrfs_info(fs_info, "clearing %llu feature flag", 3561 flag); 3562 } 3563 spin_unlock(&fs_info->super_lock); 3564 } 3565 } 3566 3567 #define btrfs_fs_incompat(fs_info, opt) \ 3568 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3569 3570 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3571 { 3572 struct btrfs_super_block *disk_super; 3573 disk_super = fs_info->super_copy; 3574 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3575 } 3576 3577 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3578 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3579 3580 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3581 u64 flag) 3582 { 3583 struct btrfs_super_block *disk_super; 3584 u64 features; 3585 3586 disk_super = fs_info->super_copy; 3587 features = btrfs_super_compat_ro_flags(disk_super); 3588 if (!(features & flag)) { 3589 spin_lock(&fs_info->super_lock); 3590 features = btrfs_super_compat_ro_flags(disk_super); 3591 if (!(features & flag)) { 3592 features |= flag; 3593 btrfs_set_super_compat_ro_flags(disk_super, features); 3594 btrfs_info(fs_info, "setting %llu ro feature flag", 3595 flag); 3596 } 3597 spin_unlock(&fs_info->super_lock); 3598 } 3599 } 3600 3601 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3602 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3603 3604 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3605 u64 flag) 3606 { 3607 struct btrfs_super_block *disk_super; 3608 u64 features; 3609 3610 disk_super = fs_info->super_copy; 3611 features = btrfs_super_compat_ro_flags(disk_super); 3612 if (features & flag) { 3613 spin_lock(&fs_info->super_lock); 3614 features = btrfs_super_compat_ro_flags(disk_super); 3615 if (features & flag) { 3616 features &= ~flag; 3617 btrfs_set_super_compat_ro_flags(disk_super, features); 3618 btrfs_info(fs_info, "clearing %llu ro feature flag", 3619 flag); 3620 } 3621 spin_unlock(&fs_info->super_lock); 3622 } 3623 } 3624 3625 #define btrfs_fs_compat_ro(fs_info, opt) \ 3626 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3627 3628 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3629 { 3630 struct btrfs_super_block *disk_super; 3631 disk_super = fs_info->super_copy; 3632 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3633 } 3634 3635 /* acl.c */ 3636 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3637 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3638 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3639 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3640 struct inode *inode, struct inode *dir); 3641 #else 3642 #define btrfs_get_acl NULL 3643 #define btrfs_set_acl NULL 3644 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3645 struct inode *inode, struct inode *dir) 3646 { 3647 return 0; 3648 } 3649 #endif 3650 3651 /* relocation.c */ 3652 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3653 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3654 struct btrfs_root *root); 3655 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3656 struct btrfs_root *root); 3657 int btrfs_recover_relocation(struct btrfs_root *root); 3658 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3659 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3660 struct btrfs_root *root, struct extent_buffer *buf, 3661 struct extent_buffer *cow); 3662 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3663 u64 *bytes_to_reserve); 3664 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3665 struct btrfs_pending_snapshot *pending); 3666 3667 /* scrub.c */ 3668 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3669 u64 end, struct btrfs_scrub_progress *progress, 3670 int readonly, int is_dev_replace); 3671 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3672 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3673 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3674 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3675 struct btrfs_device *dev); 3676 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3677 struct btrfs_scrub_progress *progress); 3678 static inline void btrfs_init_full_stripe_locks_tree( 3679 struct btrfs_full_stripe_locks_tree *locks_root) 3680 { 3681 locks_root->root = RB_ROOT; 3682 mutex_init(&locks_root->lock); 3683 } 3684 3685 /* dev-replace.c */ 3686 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3687 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3688 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3689 3690 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3691 { 3692 btrfs_bio_counter_sub(fs_info, 1); 3693 } 3694 3695 /* reada.c */ 3696 struct reada_control { 3697 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3698 struct btrfs_key key_start; 3699 struct btrfs_key key_end; /* exclusive */ 3700 atomic_t elems; 3701 struct kref refcnt; 3702 wait_queue_head_t wait; 3703 }; 3704 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3705 struct btrfs_key *start, struct btrfs_key *end); 3706 int btrfs_reada_wait(void *handle); 3707 void btrfs_reada_detach(void *handle); 3708 int btree_readahead_hook(struct extent_buffer *eb, int err); 3709 3710 static inline int is_fstree(u64 rootid) 3711 { 3712 if (rootid == BTRFS_FS_TREE_OBJECTID || 3713 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3714 !btrfs_qgroup_level(rootid))) 3715 return 1; 3716 return 0; 3717 } 3718 3719 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3720 { 3721 return signal_pending(current); 3722 } 3723 3724 /* Sanity test specific functions */ 3725 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3726 void btrfs_test_destroy_inode(struct inode *inode); 3727 #endif 3728 3729 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3730 { 3731 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3732 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3733 &fs_info->fs_state))) 3734 return 1; 3735 #endif 3736 return 0; 3737 } 3738 #endif 3739