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 wait_queue_head_t wait; 683 spinlock_t lock; 684 }; 685 686 /* used by the raid56 code to lock stripes for read/modify/write */ 687 struct btrfs_stripe_hash_table { 688 struct list_head stripe_cache; 689 spinlock_t cache_lock; 690 int cache_size; 691 struct btrfs_stripe_hash table[]; 692 }; 693 694 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 695 696 void btrfs_init_async_reclaim_work(struct work_struct *work); 697 698 /* fs_info */ 699 struct reloc_control; 700 struct btrfs_device; 701 struct btrfs_fs_devices; 702 struct btrfs_balance_control; 703 struct btrfs_delayed_root; 704 705 #define BTRFS_FS_BARRIER 1 706 #define BTRFS_FS_CLOSING_START 2 707 #define BTRFS_FS_CLOSING_DONE 3 708 #define BTRFS_FS_LOG_RECOVERING 4 709 #define BTRFS_FS_OPEN 5 710 #define BTRFS_FS_QUOTA_ENABLED 6 711 #define BTRFS_FS_QUOTA_ENABLING 7 712 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 713 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 714 #define BTRFS_FS_BTREE_ERR 11 715 #define BTRFS_FS_LOG1_ERR 12 716 #define BTRFS_FS_LOG2_ERR 13 717 #define BTRFS_FS_QUOTA_OVERRIDE 14 718 /* Used to record internally whether fs has been frozen */ 719 #define BTRFS_FS_FROZEN 15 720 721 /* 722 * Indicate that a whole-filesystem exclusive operation is running 723 * (device replace, resize, device add/delete, balance) 724 */ 725 #define BTRFS_FS_EXCL_OP 16 726 727 struct btrfs_fs_info { 728 u8 fsid[BTRFS_FSID_SIZE]; 729 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 730 unsigned long flags; 731 struct btrfs_root *extent_root; 732 struct btrfs_root *tree_root; 733 struct btrfs_root *chunk_root; 734 struct btrfs_root *dev_root; 735 struct btrfs_root *fs_root; 736 struct btrfs_root *csum_root; 737 struct btrfs_root *quota_root; 738 struct btrfs_root *uuid_root; 739 struct btrfs_root *free_space_root; 740 741 /* the log root tree is a directory of all the other log roots */ 742 struct btrfs_root *log_root_tree; 743 744 spinlock_t fs_roots_radix_lock; 745 struct radix_tree_root fs_roots_radix; 746 747 /* block group cache stuff */ 748 spinlock_t block_group_cache_lock; 749 u64 first_logical_byte; 750 struct rb_root block_group_cache_tree; 751 752 /* keep track of unallocated space */ 753 atomic64_t free_chunk_space; 754 755 struct extent_io_tree freed_extents[2]; 756 struct extent_io_tree *pinned_extents; 757 758 /* logical->physical extent mapping */ 759 struct btrfs_mapping_tree mapping_tree; 760 761 /* 762 * block reservation for extent, checksum, root tree and 763 * delayed dir index item 764 */ 765 struct btrfs_block_rsv global_block_rsv; 766 /* block reservation for metadata operations */ 767 struct btrfs_block_rsv trans_block_rsv; 768 /* block reservation for chunk tree */ 769 struct btrfs_block_rsv chunk_block_rsv; 770 /* block reservation for delayed operations */ 771 struct btrfs_block_rsv delayed_block_rsv; 772 773 struct btrfs_block_rsv empty_block_rsv; 774 775 u64 generation; 776 u64 last_trans_committed; 777 u64 avg_delayed_ref_runtime; 778 779 /* 780 * this is updated to the current trans every time a full commit 781 * is required instead of the faster short fsync log commits 782 */ 783 u64 last_trans_log_full_commit; 784 unsigned long mount_opt; 785 /* 786 * Track requests for actions that need to be done during transaction 787 * commit (like for some mount options). 788 */ 789 unsigned long pending_changes; 790 unsigned long compress_type:4; 791 unsigned int compress_level; 792 int commit_interval; 793 /* 794 * It is a suggestive number, the read side is safe even it gets a 795 * wrong number because we will write out the data into a regular 796 * extent. The write side(mount/remount) is under ->s_umount lock, 797 * so it is also safe. 798 */ 799 u64 max_inline; 800 801 struct btrfs_transaction *running_transaction; 802 wait_queue_head_t transaction_throttle; 803 wait_queue_head_t transaction_wait; 804 wait_queue_head_t transaction_blocked_wait; 805 wait_queue_head_t async_submit_wait; 806 807 /* 808 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 809 * when they are updated. 810 * 811 * Because we do not clear the flags for ever, so we needn't use 812 * the lock on the read side. 813 * 814 * We also needn't use the lock when we mount the fs, because 815 * there is no other task which will update the flag. 816 */ 817 spinlock_t super_lock; 818 struct btrfs_super_block *super_copy; 819 struct btrfs_super_block *super_for_commit; 820 struct super_block *sb; 821 struct inode *btree_inode; 822 struct mutex tree_log_mutex; 823 struct mutex transaction_kthread_mutex; 824 struct mutex cleaner_mutex; 825 struct mutex chunk_mutex; 826 struct mutex volume_mutex; 827 828 /* 829 * this is taken to make sure we don't set block groups ro after 830 * the free space cache has been allocated on them 831 */ 832 struct mutex ro_block_group_mutex; 833 834 /* this is used during read/modify/write to make sure 835 * no two ios are trying to mod the same stripe at the same 836 * time 837 */ 838 struct btrfs_stripe_hash_table *stripe_hash_table; 839 840 /* 841 * this protects the ordered operations list only while we are 842 * processing all of the entries on it. This way we make 843 * sure the commit code doesn't find the list temporarily empty 844 * because another function happens to be doing non-waiting preflush 845 * before jumping into the main commit. 846 */ 847 struct mutex ordered_operations_mutex; 848 849 struct rw_semaphore commit_root_sem; 850 851 struct rw_semaphore cleanup_work_sem; 852 853 struct rw_semaphore subvol_sem; 854 struct srcu_struct subvol_srcu; 855 856 spinlock_t trans_lock; 857 /* 858 * the reloc mutex goes with the trans lock, it is taken 859 * during commit to protect us from the relocation code 860 */ 861 struct mutex reloc_mutex; 862 863 struct list_head trans_list; 864 struct list_head dead_roots; 865 struct list_head caching_block_groups; 866 867 spinlock_t delayed_iput_lock; 868 struct list_head delayed_iputs; 869 struct mutex cleaner_delayed_iput_mutex; 870 871 /* this protects tree_mod_seq_list */ 872 spinlock_t tree_mod_seq_lock; 873 atomic64_t tree_mod_seq; 874 struct list_head tree_mod_seq_list; 875 876 /* this protects tree_mod_log */ 877 rwlock_t tree_mod_log_lock; 878 struct rb_root tree_mod_log; 879 880 atomic_t async_delalloc_pages; 881 atomic_t open_ioctl_trans; 882 883 /* 884 * this is used to protect the following list -- ordered_roots. 885 */ 886 spinlock_t ordered_root_lock; 887 888 /* 889 * all fs/file tree roots in which there are data=ordered extents 890 * pending writeback are added into this list. 891 * 892 * these can span multiple transactions and basically include 893 * every dirty data page that isn't from nodatacow 894 */ 895 struct list_head ordered_roots; 896 897 struct mutex delalloc_root_mutex; 898 spinlock_t delalloc_root_lock; 899 /* all fs/file tree roots that have delalloc inodes. */ 900 struct list_head delalloc_roots; 901 902 /* 903 * there is a pool of worker threads for checksumming during writes 904 * and a pool for checksumming after reads. This is because readers 905 * can run with FS locks held, and the writers may be waiting for 906 * those locks. We don't want ordering in the pending list to cause 907 * deadlocks, and so the two are serviced separately. 908 * 909 * A third pool does submit_bio to avoid deadlocking with the other 910 * two 911 */ 912 struct btrfs_workqueue *workers; 913 struct btrfs_workqueue *delalloc_workers; 914 struct btrfs_workqueue *flush_workers; 915 struct btrfs_workqueue *endio_workers; 916 struct btrfs_workqueue *endio_meta_workers; 917 struct btrfs_workqueue *endio_raid56_workers; 918 struct btrfs_workqueue *endio_repair_workers; 919 struct btrfs_workqueue *rmw_workers; 920 struct btrfs_workqueue *endio_meta_write_workers; 921 struct btrfs_workqueue *endio_write_workers; 922 struct btrfs_workqueue *endio_freespace_worker; 923 struct btrfs_workqueue *submit_workers; 924 struct btrfs_workqueue *caching_workers; 925 struct btrfs_workqueue *readahead_workers; 926 927 /* 928 * fixup workers take dirty pages that didn't properly go through 929 * the cow mechanism and make them safe to write. It happens 930 * for the sys_munmap function call path 931 */ 932 struct btrfs_workqueue *fixup_workers; 933 struct btrfs_workqueue *delayed_workers; 934 935 /* the extent workers do delayed refs on the extent allocation tree */ 936 struct btrfs_workqueue *extent_workers; 937 struct task_struct *transaction_kthread; 938 struct task_struct *cleaner_kthread; 939 int thread_pool_size; 940 941 struct kobject *space_info_kobj; 942 943 u64 total_pinned; 944 945 /* used to keep from writing metadata until there is a nice batch */ 946 struct percpu_counter dirty_metadata_bytes; 947 struct percpu_counter delalloc_bytes; 948 s32 dirty_metadata_batch; 949 s32 delalloc_batch; 950 951 struct list_head dirty_cowonly_roots; 952 953 struct btrfs_fs_devices *fs_devices; 954 955 /* 956 * the space_info list is almost entirely read only. It only changes 957 * when we add a new raid type to the FS, and that happens 958 * very rarely. RCU is used to protect it. 959 */ 960 struct list_head space_info; 961 962 struct btrfs_space_info *data_sinfo; 963 964 struct reloc_control *reloc_ctl; 965 966 /* data_alloc_cluster is only used in ssd_spread mode */ 967 struct btrfs_free_cluster data_alloc_cluster; 968 969 /* all metadata allocations go through this cluster */ 970 struct btrfs_free_cluster meta_alloc_cluster; 971 972 /* auto defrag inodes go here */ 973 spinlock_t defrag_inodes_lock; 974 struct rb_root defrag_inodes; 975 atomic_t defrag_running; 976 977 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 978 seqlock_t profiles_lock; 979 /* 980 * these three are in extended format (availability of single 981 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 982 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 983 */ 984 u64 avail_data_alloc_bits; 985 u64 avail_metadata_alloc_bits; 986 u64 avail_system_alloc_bits; 987 988 /* restriper state */ 989 spinlock_t balance_lock; 990 struct mutex balance_mutex; 991 atomic_t balance_running; 992 atomic_t balance_pause_req; 993 atomic_t balance_cancel_req; 994 struct btrfs_balance_control *balance_ctl; 995 wait_queue_head_t balance_wait_q; 996 997 unsigned data_chunk_allocations; 998 unsigned metadata_ratio; 999 1000 void *bdev_holder; 1001 1002 /* private scrub information */ 1003 struct mutex scrub_lock; 1004 atomic_t scrubs_running; 1005 atomic_t scrub_pause_req; 1006 atomic_t scrubs_paused; 1007 atomic_t scrub_cancel_req; 1008 wait_queue_head_t scrub_pause_wait; 1009 int scrub_workers_refcnt; 1010 struct btrfs_workqueue *scrub_workers; 1011 struct btrfs_workqueue *scrub_wr_completion_workers; 1012 struct btrfs_workqueue *scrub_nocow_workers; 1013 struct btrfs_workqueue *scrub_parity_workers; 1014 1015 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1016 u32 check_integrity_print_mask; 1017 #endif 1018 /* is qgroup tracking in a consistent state? */ 1019 u64 qgroup_flags; 1020 1021 /* holds configuration and tracking. Protected by qgroup_lock */ 1022 struct rb_root qgroup_tree; 1023 struct rb_root qgroup_op_tree; 1024 spinlock_t qgroup_lock; 1025 spinlock_t qgroup_op_lock; 1026 atomic_t qgroup_op_seq; 1027 1028 /* 1029 * used to avoid frequently calling ulist_alloc()/ulist_free() 1030 * when doing qgroup accounting, it must be protected by qgroup_lock. 1031 */ 1032 struct ulist *qgroup_ulist; 1033 1034 /* protect user change for quota operations */ 1035 struct mutex qgroup_ioctl_lock; 1036 1037 /* list of dirty qgroups to be written at next commit */ 1038 struct list_head dirty_qgroups; 1039 1040 /* used by qgroup for an efficient tree traversal */ 1041 u64 qgroup_seq; 1042 1043 /* qgroup rescan items */ 1044 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1045 struct btrfs_key qgroup_rescan_progress; 1046 struct btrfs_workqueue *qgroup_rescan_workers; 1047 struct completion qgroup_rescan_completion; 1048 struct btrfs_work qgroup_rescan_work; 1049 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1050 1051 /* filesystem state */ 1052 unsigned long fs_state; 1053 1054 struct btrfs_delayed_root *delayed_root; 1055 1056 /* readahead tree */ 1057 spinlock_t reada_lock; 1058 struct radix_tree_root reada_tree; 1059 1060 /* readahead works cnt */ 1061 atomic_t reada_works_cnt; 1062 1063 /* Extent buffer radix tree */ 1064 spinlock_t buffer_lock; 1065 struct radix_tree_root buffer_radix; 1066 1067 /* next backup root to be overwritten */ 1068 int backup_root_index; 1069 1070 /* device replace state */ 1071 struct btrfs_dev_replace dev_replace; 1072 1073 struct percpu_counter bio_counter; 1074 wait_queue_head_t replace_wait; 1075 1076 struct semaphore uuid_tree_rescan_sem; 1077 1078 /* Used to reclaim the metadata space in the background. */ 1079 struct work_struct async_reclaim_work; 1080 1081 spinlock_t unused_bgs_lock; 1082 struct list_head unused_bgs; 1083 struct mutex unused_bg_unpin_mutex; 1084 struct mutex delete_unused_bgs_mutex; 1085 1086 /* For btrfs to record security options */ 1087 struct security_mnt_opts security_opts; 1088 1089 /* 1090 * Chunks that can't be freed yet (under a trim/discard operation) 1091 * and will be latter freed. Protected by fs_info->chunk_mutex. 1092 */ 1093 struct list_head pinned_chunks; 1094 1095 /* Cached block sizes */ 1096 u32 nodesize; 1097 u32 sectorsize; 1098 u32 stripesize; 1099 1100 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1101 spinlock_t ref_verify_lock; 1102 struct rb_root block_tree; 1103 #endif 1104 }; 1105 1106 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1107 { 1108 return sb->s_fs_info; 1109 } 1110 1111 struct btrfs_subvolume_writers { 1112 struct percpu_counter counter; 1113 wait_queue_head_t wait; 1114 }; 1115 1116 /* 1117 * The state of btrfs root 1118 */ 1119 /* 1120 * btrfs_record_root_in_trans is a multi-step process, 1121 * and it can race with the balancing code. But the 1122 * race is very small, and only the first time the root 1123 * is added to each transaction. So IN_TRANS_SETUP 1124 * is used to tell us when more checks are required 1125 */ 1126 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1127 #define BTRFS_ROOT_REF_COWS 1 1128 #define BTRFS_ROOT_TRACK_DIRTY 2 1129 #define BTRFS_ROOT_IN_RADIX 3 1130 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1131 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1132 #define BTRFS_ROOT_FORCE_COW 6 1133 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1134 #define BTRFS_ROOT_DIRTY 8 1135 1136 /* 1137 * in ram representation of the tree. extent_root is used for all allocations 1138 * and for the extent tree extent_root root. 1139 */ 1140 struct btrfs_root { 1141 struct extent_buffer *node; 1142 1143 struct extent_buffer *commit_root; 1144 struct btrfs_root *log_root; 1145 struct btrfs_root *reloc_root; 1146 1147 unsigned long state; 1148 struct btrfs_root_item root_item; 1149 struct btrfs_key root_key; 1150 struct btrfs_fs_info *fs_info; 1151 struct extent_io_tree dirty_log_pages; 1152 1153 struct mutex objectid_mutex; 1154 1155 spinlock_t accounting_lock; 1156 struct btrfs_block_rsv *block_rsv; 1157 1158 /* free ino cache stuff */ 1159 struct btrfs_free_space_ctl *free_ino_ctl; 1160 enum btrfs_caching_type ino_cache_state; 1161 spinlock_t ino_cache_lock; 1162 wait_queue_head_t ino_cache_wait; 1163 struct btrfs_free_space_ctl *free_ino_pinned; 1164 u64 ino_cache_progress; 1165 struct inode *ino_cache_inode; 1166 1167 struct mutex log_mutex; 1168 wait_queue_head_t log_writer_wait; 1169 wait_queue_head_t log_commit_wait[2]; 1170 struct list_head log_ctxs[2]; 1171 atomic_t log_writers; 1172 atomic_t log_commit[2]; 1173 atomic_t log_batch; 1174 int log_transid; 1175 /* No matter the commit succeeds or not*/ 1176 int log_transid_committed; 1177 /* Just be updated when the commit succeeds. */ 1178 int last_log_commit; 1179 pid_t log_start_pid; 1180 1181 u64 objectid; 1182 u64 last_trans; 1183 1184 u32 type; 1185 1186 u64 highest_objectid; 1187 1188 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1189 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1190 u64 alloc_bytenr; 1191 #endif 1192 1193 u64 defrag_trans_start; 1194 struct btrfs_key defrag_progress; 1195 struct btrfs_key defrag_max; 1196 char *name; 1197 1198 /* the dirty list is only used by non-reference counted roots */ 1199 struct list_head dirty_list; 1200 1201 struct list_head root_list; 1202 1203 spinlock_t log_extents_lock[2]; 1204 struct list_head logged_list[2]; 1205 1206 spinlock_t orphan_lock; 1207 atomic_t orphan_inodes; 1208 struct btrfs_block_rsv *orphan_block_rsv; 1209 int orphan_cleanup_state; 1210 1211 spinlock_t inode_lock; 1212 /* red-black tree that keeps track of in-memory inodes */ 1213 struct rb_root inode_tree; 1214 1215 /* 1216 * radix tree that keeps track of delayed nodes of every inode, 1217 * protected by inode_lock 1218 */ 1219 struct radix_tree_root delayed_nodes_tree; 1220 /* 1221 * right now this just gets used so that a root has its own devid 1222 * for stat. It may be used for more later 1223 */ 1224 dev_t anon_dev; 1225 1226 spinlock_t root_item_lock; 1227 refcount_t refs; 1228 1229 struct mutex delalloc_mutex; 1230 spinlock_t delalloc_lock; 1231 /* 1232 * all of the inodes that have delalloc bytes. It is possible for 1233 * this list to be empty even when there is still dirty data=ordered 1234 * extents waiting to finish IO. 1235 */ 1236 struct list_head delalloc_inodes; 1237 struct list_head delalloc_root; 1238 u64 nr_delalloc_inodes; 1239 1240 struct mutex ordered_extent_mutex; 1241 /* 1242 * this is used by the balancing code to wait for all the pending 1243 * ordered extents 1244 */ 1245 spinlock_t ordered_extent_lock; 1246 1247 /* 1248 * all of the data=ordered extents pending writeback 1249 * these can span multiple transactions and basically include 1250 * every dirty data page that isn't from nodatacow 1251 */ 1252 struct list_head ordered_extents; 1253 struct list_head ordered_root; 1254 u64 nr_ordered_extents; 1255 1256 /* 1257 * Number of currently running SEND ioctls to prevent 1258 * manipulation with the read-only status via SUBVOL_SETFLAGS 1259 */ 1260 int send_in_progress; 1261 struct btrfs_subvolume_writers *subv_writers; 1262 atomic_t will_be_snapshotted; 1263 1264 /* For qgroup metadata space reserve */ 1265 atomic64_t qgroup_meta_rsv; 1266 }; 1267 1268 struct btrfs_file_private { 1269 struct btrfs_trans_handle *trans; 1270 void *filldir_buf; 1271 }; 1272 1273 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1274 { 1275 return btrfs_sb(inode->i_sb)->sectorsize; 1276 } 1277 1278 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1279 { 1280 1281 return info->nodesize - sizeof(struct btrfs_header); 1282 } 1283 1284 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1285 1286 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1287 { 1288 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1289 } 1290 1291 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1292 { 1293 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1294 } 1295 1296 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1297 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1298 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1299 { 1300 return BTRFS_MAX_ITEM_SIZE(info) - 1301 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1302 } 1303 1304 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1305 { 1306 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1307 } 1308 1309 /* 1310 * Flags for mount options. 1311 * 1312 * Note: don't forget to add new options to btrfs_show_options() 1313 */ 1314 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1315 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1316 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1317 #define BTRFS_MOUNT_SSD (1 << 3) 1318 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1319 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1320 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1321 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1322 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1323 #define BTRFS_MOUNT_NOSSD (1 << 9) 1324 #define BTRFS_MOUNT_DISCARD (1 << 10) 1325 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1326 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1327 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1328 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1329 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1330 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1331 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1332 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1333 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1334 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1335 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1336 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1337 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1338 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1339 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1340 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1341 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1342 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1343 1344 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1345 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1346 1347 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1348 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1349 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1350 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1351 BTRFS_MOUNT_##opt) 1352 1353 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1354 { \ 1355 if (!btrfs_test_opt(fs_info, opt)) \ 1356 btrfs_info(fs_info, fmt, ##args); \ 1357 btrfs_set_opt(fs_info->mount_opt, opt); \ 1358 } 1359 1360 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1361 { \ 1362 if (btrfs_test_opt(fs_info, opt)) \ 1363 btrfs_info(fs_info, fmt, ##args); \ 1364 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1365 } 1366 1367 #ifdef CONFIG_BTRFS_DEBUG 1368 static inline int 1369 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1370 { 1371 struct btrfs_fs_info *fs_info = block_group->fs_info; 1372 1373 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1374 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1375 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1376 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1377 } 1378 #endif 1379 1380 /* 1381 * Requests for changes that need to be done during transaction commit. 1382 * 1383 * Internal mount options that are used for special handling of the real 1384 * mount options (eg. cannot be set during remount and have to be set during 1385 * transaction commit) 1386 */ 1387 1388 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1389 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1390 #define BTRFS_PENDING_COMMIT (2) 1391 1392 #define btrfs_test_pending(info, opt) \ 1393 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1394 #define btrfs_set_pending(info, opt) \ 1395 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1396 #define btrfs_clear_pending(info, opt) \ 1397 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1398 1399 /* 1400 * Helpers for setting pending mount option changes. 1401 * 1402 * Expects corresponding macros 1403 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1404 */ 1405 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1406 do { \ 1407 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1408 btrfs_info((info), fmt, ##args); \ 1409 btrfs_set_pending((info), SET_##opt); \ 1410 btrfs_clear_pending((info), CLEAR_##opt); \ 1411 } \ 1412 } while(0) 1413 1414 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1415 do { \ 1416 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1417 btrfs_info((info), fmt, ##args); \ 1418 btrfs_set_pending((info), CLEAR_##opt); \ 1419 btrfs_clear_pending((info), SET_##opt); \ 1420 } \ 1421 } while(0) 1422 1423 /* 1424 * Inode flags 1425 */ 1426 #define BTRFS_INODE_NODATASUM (1 << 0) 1427 #define BTRFS_INODE_NODATACOW (1 << 1) 1428 #define BTRFS_INODE_READONLY (1 << 2) 1429 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1430 #define BTRFS_INODE_PREALLOC (1 << 4) 1431 #define BTRFS_INODE_SYNC (1 << 5) 1432 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1433 #define BTRFS_INODE_APPEND (1 << 7) 1434 #define BTRFS_INODE_NODUMP (1 << 8) 1435 #define BTRFS_INODE_NOATIME (1 << 9) 1436 #define BTRFS_INODE_DIRSYNC (1 << 10) 1437 #define BTRFS_INODE_COMPRESS (1 << 11) 1438 1439 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1440 1441 struct btrfs_map_token { 1442 const struct extent_buffer *eb; 1443 char *kaddr; 1444 unsigned long offset; 1445 }; 1446 1447 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1448 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1449 1450 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1451 { 1452 token->kaddr = NULL; 1453 } 1454 1455 /* some macros to generate set/get functions for the struct fields. This 1456 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1457 * one for u8: 1458 */ 1459 #define le8_to_cpu(v) (v) 1460 #define cpu_to_le8(v) (v) 1461 #define __le8 u8 1462 1463 #define read_eb_member(eb, ptr, type, member, result) (\ 1464 read_extent_buffer(eb, (char *)(result), \ 1465 ((unsigned long)(ptr)) + \ 1466 offsetof(type, member), \ 1467 sizeof(((type *)0)->member))) 1468 1469 #define write_eb_member(eb, ptr, type, member, result) (\ 1470 write_extent_buffer(eb, (char *)(result), \ 1471 ((unsigned long)(ptr)) + \ 1472 offsetof(type, member), \ 1473 sizeof(((type *)0)->member))) 1474 1475 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1476 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1477 const void *ptr, unsigned long off, \ 1478 struct btrfs_map_token *token); \ 1479 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1480 unsigned long off, u##bits val, \ 1481 struct btrfs_map_token *token); \ 1482 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1483 const void *ptr, \ 1484 unsigned long off) \ 1485 { \ 1486 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1487 } \ 1488 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1489 unsigned long off, u##bits val) \ 1490 { \ 1491 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1492 } 1493 1494 DECLARE_BTRFS_SETGET_BITS(8) 1495 DECLARE_BTRFS_SETGET_BITS(16) 1496 DECLARE_BTRFS_SETGET_BITS(32) 1497 DECLARE_BTRFS_SETGET_BITS(64) 1498 1499 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1500 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1501 const type *s) \ 1502 { \ 1503 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1504 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1505 } \ 1506 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1507 u##bits val) \ 1508 { \ 1509 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1510 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1511 } \ 1512 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1513 const type *s, \ 1514 struct btrfs_map_token *token) \ 1515 { \ 1516 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1517 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1518 } \ 1519 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1520 type *s, u##bits val, \ 1521 struct btrfs_map_token *token) \ 1522 { \ 1523 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1524 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1525 } 1526 1527 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1528 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1529 { \ 1530 const type *p = page_address(eb->pages[0]); \ 1531 u##bits res = le##bits##_to_cpu(p->member); \ 1532 return res; \ 1533 } \ 1534 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1535 u##bits val) \ 1536 { \ 1537 type *p = page_address(eb->pages[0]); \ 1538 p->member = cpu_to_le##bits(val); \ 1539 } 1540 1541 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1542 static inline u##bits btrfs_##name(const type *s) \ 1543 { \ 1544 return le##bits##_to_cpu(s->member); \ 1545 } \ 1546 static inline void btrfs_set_##name(type *s, u##bits val) \ 1547 { \ 1548 s->member = cpu_to_le##bits(val); \ 1549 } 1550 1551 1552 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1553 struct btrfs_dev_item *s) 1554 { 1555 BUILD_BUG_ON(sizeof(u64) != 1556 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1557 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1558 total_bytes)); 1559 } 1560 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1561 struct btrfs_dev_item *s, 1562 u64 val) 1563 { 1564 BUILD_BUG_ON(sizeof(u64) != 1565 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1566 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1567 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1568 } 1569 1570 1571 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1572 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1573 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1574 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1575 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1576 start_offset, 64); 1577 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1578 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1579 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1580 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1581 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1582 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1583 1584 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1585 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1586 total_bytes, 64); 1587 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1588 bytes_used, 64); 1589 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1590 io_align, 32); 1591 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1592 io_width, 32); 1593 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1594 sector_size, 32); 1595 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1596 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1597 dev_group, 32); 1598 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1599 seek_speed, 8); 1600 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1601 bandwidth, 8); 1602 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1603 generation, 64); 1604 1605 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1606 { 1607 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1608 } 1609 1610 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1611 { 1612 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1613 } 1614 1615 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1616 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1617 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1618 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1619 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1620 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1621 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1622 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1623 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1624 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1625 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1626 1627 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1628 { 1629 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1630 } 1631 1632 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1633 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1634 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1635 stripe_len, 64); 1636 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1637 io_align, 32); 1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1639 io_width, 32); 1640 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1641 sector_size, 32); 1642 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1644 num_stripes, 16); 1645 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1646 sub_stripes, 16); 1647 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1648 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1649 1650 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1651 int nr) 1652 { 1653 unsigned long offset = (unsigned long)c; 1654 offset += offsetof(struct btrfs_chunk, stripe); 1655 offset += nr * sizeof(struct btrfs_stripe); 1656 return (struct btrfs_stripe *)offset; 1657 } 1658 1659 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1660 { 1661 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1662 } 1663 1664 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1665 struct btrfs_chunk *c, int nr) 1666 { 1667 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1668 } 1669 1670 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1671 struct btrfs_chunk *c, int nr) 1672 { 1673 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1674 } 1675 1676 /* struct btrfs_block_group_item */ 1677 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1678 used, 64); 1679 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1680 used, 64); 1681 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1682 struct btrfs_block_group_item, chunk_objectid, 64); 1683 1684 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1685 struct btrfs_block_group_item, chunk_objectid, 64); 1686 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1687 struct btrfs_block_group_item, flags, 64); 1688 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1689 struct btrfs_block_group_item, flags, 64); 1690 1691 /* struct btrfs_free_space_info */ 1692 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1693 extent_count, 32); 1694 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1695 1696 /* struct btrfs_inode_ref */ 1697 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1698 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1699 1700 /* struct btrfs_inode_extref */ 1701 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1702 parent_objectid, 64); 1703 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1704 name_len, 16); 1705 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1706 1707 /* struct btrfs_inode_item */ 1708 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1709 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1710 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1711 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1712 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1713 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1714 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1715 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1716 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1717 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1718 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1719 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1721 generation, 64); 1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1723 sequence, 64); 1724 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1725 transid, 64); 1726 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1728 nbytes, 64); 1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1730 block_group, 64); 1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1733 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1735 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1736 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1737 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1738 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1739 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1740 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1741 1742 /* struct btrfs_dev_extent */ 1743 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1744 chunk_tree, 64); 1745 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1746 chunk_objectid, 64); 1747 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1748 chunk_offset, 64); 1749 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1750 1751 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1752 { 1753 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1754 return (unsigned long)dev + ptr; 1755 } 1756 1757 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1758 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1759 generation, 64); 1760 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1761 1762 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1763 1764 1765 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1766 1767 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1768 struct btrfs_tree_block_info *item, 1769 struct btrfs_disk_key *key) 1770 { 1771 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1772 } 1773 1774 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1775 struct btrfs_tree_block_info *item, 1776 struct btrfs_disk_key *key) 1777 { 1778 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1779 } 1780 1781 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1782 root, 64); 1783 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1784 objectid, 64); 1785 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1786 offset, 64); 1787 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1788 count, 32); 1789 1790 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1791 count, 32); 1792 1793 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1794 type, 8); 1795 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1796 offset, 64); 1797 1798 static inline u32 btrfs_extent_inline_ref_size(int type) 1799 { 1800 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1801 type == BTRFS_SHARED_BLOCK_REF_KEY) 1802 return sizeof(struct btrfs_extent_inline_ref); 1803 if (type == BTRFS_SHARED_DATA_REF_KEY) 1804 return sizeof(struct btrfs_shared_data_ref) + 1805 sizeof(struct btrfs_extent_inline_ref); 1806 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1807 return sizeof(struct btrfs_extent_data_ref) + 1808 offsetof(struct btrfs_extent_inline_ref, offset); 1809 return 0; 1810 } 1811 1812 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1813 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1814 generation, 64); 1815 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1816 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1817 1818 /* struct btrfs_node */ 1819 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1820 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1821 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1822 blockptr, 64); 1823 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1824 generation, 64); 1825 1826 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1827 { 1828 unsigned long ptr; 1829 ptr = offsetof(struct btrfs_node, ptrs) + 1830 sizeof(struct btrfs_key_ptr) * nr; 1831 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1832 } 1833 1834 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1835 int nr, u64 val) 1836 { 1837 unsigned long ptr; 1838 ptr = offsetof(struct btrfs_node, ptrs) + 1839 sizeof(struct btrfs_key_ptr) * nr; 1840 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1841 } 1842 1843 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1844 { 1845 unsigned long ptr; 1846 ptr = offsetof(struct btrfs_node, ptrs) + 1847 sizeof(struct btrfs_key_ptr) * nr; 1848 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1849 } 1850 1851 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1852 int nr, u64 val) 1853 { 1854 unsigned long ptr; 1855 ptr = offsetof(struct btrfs_node, ptrs) + 1856 sizeof(struct btrfs_key_ptr) * nr; 1857 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1858 } 1859 1860 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1861 { 1862 return offsetof(struct btrfs_node, ptrs) + 1863 sizeof(struct btrfs_key_ptr) * nr; 1864 } 1865 1866 void btrfs_node_key(const struct extent_buffer *eb, 1867 struct btrfs_disk_key *disk_key, int nr); 1868 1869 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1870 struct btrfs_disk_key *disk_key, int nr) 1871 { 1872 unsigned long ptr; 1873 ptr = btrfs_node_key_ptr_offset(nr); 1874 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1875 struct btrfs_key_ptr, key, disk_key); 1876 } 1877 1878 /* struct btrfs_item */ 1879 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1880 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1881 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1882 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1883 1884 static inline unsigned long btrfs_item_nr_offset(int nr) 1885 { 1886 return offsetof(struct btrfs_leaf, items) + 1887 sizeof(struct btrfs_item) * nr; 1888 } 1889 1890 static inline struct btrfs_item *btrfs_item_nr(int nr) 1891 { 1892 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1893 } 1894 1895 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1896 struct btrfs_item *item) 1897 { 1898 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1899 } 1900 1901 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1902 { 1903 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1904 } 1905 1906 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1907 { 1908 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1909 } 1910 1911 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1912 { 1913 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1914 } 1915 1916 static inline void btrfs_item_key(const struct extent_buffer *eb, 1917 struct btrfs_disk_key *disk_key, int nr) 1918 { 1919 struct btrfs_item *item = btrfs_item_nr(nr); 1920 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1921 } 1922 1923 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1924 struct btrfs_disk_key *disk_key, int nr) 1925 { 1926 struct btrfs_item *item = btrfs_item_nr(nr); 1927 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1928 } 1929 1930 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1931 1932 /* 1933 * struct btrfs_root_ref 1934 */ 1935 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1936 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1937 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1938 1939 /* struct btrfs_dir_item */ 1940 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1941 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1942 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1943 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1944 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1945 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1946 data_len, 16); 1947 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1948 name_len, 16); 1949 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1950 transid, 64); 1951 1952 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1953 const struct btrfs_dir_item *item, 1954 struct btrfs_disk_key *key) 1955 { 1956 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1957 } 1958 1959 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1960 struct btrfs_dir_item *item, 1961 const struct btrfs_disk_key *key) 1962 { 1963 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1964 } 1965 1966 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1967 num_entries, 64); 1968 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1969 num_bitmaps, 64); 1970 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1971 generation, 64); 1972 1973 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1974 const struct btrfs_free_space_header *h, 1975 struct btrfs_disk_key *key) 1976 { 1977 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1978 } 1979 1980 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1981 struct btrfs_free_space_header *h, 1982 const struct btrfs_disk_key *key) 1983 { 1984 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1985 } 1986 1987 /* struct btrfs_disk_key */ 1988 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1989 objectid, 64); 1990 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1991 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1992 1993 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1994 const struct btrfs_disk_key *disk) 1995 { 1996 cpu->offset = le64_to_cpu(disk->offset); 1997 cpu->type = disk->type; 1998 cpu->objectid = le64_to_cpu(disk->objectid); 1999 } 2000 2001 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2002 const struct btrfs_key *cpu) 2003 { 2004 disk->offset = cpu_to_le64(cpu->offset); 2005 disk->type = cpu->type; 2006 disk->objectid = cpu_to_le64(cpu->objectid); 2007 } 2008 2009 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2010 struct btrfs_key *key, int nr) 2011 { 2012 struct btrfs_disk_key disk_key; 2013 btrfs_node_key(eb, &disk_key, nr); 2014 btrfs_disk_key_to_cpu(key, &disk_key); 2015 } 2016 2017 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2018 struct btrfs_key *key, int nr) 2019 { 2020 struct btrfs_disk_key disk_key; 2021 btrfs_item_key(eb, &disk_key, nr); 2022 btrfs_disk_key_to_cpu(key, &disk_key); 2023 } 2024 2025 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2026 const struct btrfs_dir_item *item, 2027 struct btrfs_key *key) 2028 { 2029 struct btrfs_disk_key disk_key; 2030 btrfs_dir_item_key(eb, item, &disk_key); 2031 btrfs_disk_key_to_cpu(key, &disk_key); 2032 } 2033 2034 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2035 { 2036 return key->type; 2037 } 2038 2039 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2040 { 2041 key->type = val; 2042 } 2043 2044 /* struct btrfs_header */ 2045 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2046 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2047 generation, 64); 2048 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2049 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2050 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2051 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2052 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2053 generation, 64); 2054 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2055 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2056 nritems, 32); 2057 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2058 2059 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2060 { 2061 return (btrfs_header_flags(eb) & flag) == flag; 2062 } 2063 2064 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2065 { 2066 u64 flags = btrfs_header_flags(eb); 2067 btrfs_set_header_flags(eb, flags | flag); 2068 return (flags & flag) == flag; 2069 } 2070 2071 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2072 { 2073 u64 flags = btrfs_header_flags(eb); 2074 btrfs_set_header_flags(eb, flags & ~flag); 2075 return (flags & flag) == flag; 2076 } 2077 2078 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2079 { 2080 u64 flags = btrfs_header_flags(eb); 2081 return flags >> BTRFS_BACKREF_REV_SHIFT; 2082 } 2083 2084 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2085 int rev) 2086 { 2087 u64 flags = btrfs_header_flags(eb); 2088 flags &= ~BTRFS_BACKREF_REV_MASK; 2089 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2090 btrfs_set_header_flags(eb, flags); 2091 } 2092 2093 static inline unsigned long btrfs_header_fsid(void) 2094 { 2095 return offsetof(struct btrfs_header, fsid); 2096 } 2097 2098 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2099 { 2100 return offsetof(struct btrfs_header, chunk_tree_uuid); 2101 } 2102 2103 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2104 { 2105 return btrfs_header_level(eb) == 0; 2106 } 2107 2108 /* struct btrfs_root_item */ 2109 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2110 generation, 64); 2111 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2112 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2113 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2114 2115 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2116 generation, 64); 2117 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2118 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2119 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2120 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2121 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2122 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2123 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2124 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2125 last_snapshot, 64); 2126 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2127 generation_v2, 64); 2128 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2129 ctransid, 64); 2130 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2131 otransid, 64); 2132 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2133 stransid, 64); 2134 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2135 rtransid, 64); 2136 2137 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2138 { 2139 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2140 } 2141 2142 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2143 { 2144 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2145 } 2146 2147 /* struct btrfs_root_backup */ 2148 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2149 tree_root, 64); 2150 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2151 tree_root_gen, 64); 2152 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2153 tree_root_level, 8); 2154 2155 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2156 chunk_root, 64); 2157 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2158 chunk_root_gen, 64); 2159 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2160 chunk_root_level, 8); 2161 2162 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2163 extent_root, 64); 2164 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2165 extent_root_gen, 64); 2166 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2167 extent_root_level, 8); 2168 2169 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2170 fs_root, 64); 2171 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2172 fs_root_gen, 64); 2173 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2174 fs_root_level, 8); 2175 2176 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2177 dev_root, 64); 2178 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2179 dev_root_gen, 64); 2180 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2181 dev_root_level, 8); 2182 2183 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2184 csum_root, 64); 2185 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2186 csum_root_gen, 64); 2187 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2188 csum_root_level, 8); 2189 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2190 total_bytes, 64); 2191 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2192 bytes_used, 64); 2193 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2194 num_devices, 64); 2195 2196 /* struct btrfs_balance_item */ 2197 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2198 2199 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2200 const struct btrfs_balance_item *bi, 2201 struct btrfs_disk_balance_args *ba) 2202 { 2203 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2204 } 2205 2206 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2207 struct btrfs_balance_item *bi, 2208 const struct btrfs_disk_balance_args *ba) 2209 { 2210 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2211 } 2212 2213 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2214 const struct btrfs_balance_item *bi, 2215 struct btrfs_disk_balance_args *ba) 2216 { 2217 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2218 } 2219 2220 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2221 struct btrfs_balance_item *bi, 2222 const struct btrfs_disk_balance_args *ba) 2223 { 2224 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2225 } 2226 2227 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2228 const struct btrfs_balance_item *bi, 2229 struct btrfs_disk_balance_args *ba) 2230 { 2231 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2232 } 2233 2234 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2235 struct btrfs_balance_item *bi, 2236 const struct btrfs_disk_balance_args *ba) 2237 { 2238 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2239 } 2240 2241 static inline void 2242 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2243 const struct btrfs_disk_balance_args *disk) 2244 { 2245 memset(cpu, 0, sizeof(*cpu)); 2246 2247 cpu->profiles = le64_to_cpu(disk->profiles); 2248 cpu->usage = le64_to_cpu(disk->usage); 2249 cpu->devid = le64_to_cpu(disk->devid); 2250 cpu->pstart = le64_to_cpu(disk->pstart); 2251 cpu->pend = le64_to_cpu(disk->pend); 2252 cpu->vstart = le64_to_cpu(disk->vstart); 2253 cpu->vend = le64_to_cpu(disk->vend); 2254 cpu->target = le64_to_cpu(disk->target); 2255 cpu->flags = le64_to_cpu(disk->flags); 2256 cpu->limit = le64_to_cpu(disk->limit); 2257 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2258 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2259 } 2260 2261 static inline void 2262 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2263 const struct btrfs_balance_args *cpu) 2264 { 2265 memset(disk, 0, sizeof(*disk)); 2266 2267 disk->profiles = cpu_to_le64(cpu->profiles); 2268 disk->usage = cpu_to_le64(cpu->usage); 2269 disk->devid = cpu_to_le64(cpu->devid); 2270 disk->pstart = cpu_to_le64(cpu->pstart); 2271 disk->pend = cpu_to_le64(cpu->pend); 2272 disk->vstart = cpu_to_le64(cpu->vstart); 2273 disk->vend = cpu_to_le64(cpu->vend); 2274 disk->target = cpu_to_le64(cpu->target); 2275 disk->flags = cpu_to_le64(cpu->flags); 2276 disk->limit = cpu_to_le64(cpu->limit); 2277 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2278 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2279 } 2280 2281 /* struct btrfs_super_block */ 2282 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2283 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2284 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2285 generation, 64); 2286 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2287 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2288 struct btrfs_super_block, sys_chunk_array_size, 32); 2289 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2290 struct btrfs_super_block, chunk_root_generation, 64); 2291 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2292 root_level, 8); 2293 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2294 chunk_root, 64); 2295 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2296 chunk_root_level, 8); 2297 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2298 log_root, 64); 2299 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2300 log_root_transid, 64); 2301 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2302 log_root_level, 8); 2303 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2304 total_bytes, 64); 2305 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2306 bytes_used, 64); 2307 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2308 sectorsize, 32); 2309 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2310 nodesize, 32); 2311 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2312 stripesize, 32); 2313 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2314 root_dir_objectid, 64); 2315 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2316 num_devices, 64); 2317 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2318 compat_flags, 64); 2319 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2320 compat_ro_flags, 64); 2321 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2322 incompat_flags, 64); 2323 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2324 csum_type, 16); 2325 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2326 cache_generation, 64); 2327 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2329 uuid_tree_generation, 64); 2330 2331 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2332 { 2333 u16 t = btrfs_super_csum_type(s); 2334 /* 2335 * csum type is validated at mount time 2336 */ 2337 return btrfs_csum_sizes[t]; 2338 } 2339 2340 2341 /* 2342 * The leaf data grows from end-to-front in the node. 2343 * this returns the address of the start of the last item, 2344 * which is the stop of the leaf data stack 2345 */ 2346 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2347 const struct extent_buffer *leaf) 2348 { 2349 u32 nr = btrfs_header_nritems(leaf); 2350 2351 if (nr == 0) 2352 return BTRFS_LEAF_DATA_SIZE(fs_info); 2353 return btrfs_item_offset_nr(leaf, nr - 1); 2354 } 2355 2356 /* struct btrfs_file_extent_item */ 2357 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2358 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2359 struct btrfs_file_extent_item, disk_bytenr, 64); 2360 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2361 struct btrfs_file_extent_item, offset, 64); 2362 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2363 struct btrfs_file_extent_item, generation, 64); 2364 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2365 struct btrfs_file_extent_item, num_bytes, 64); 2366 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2367 struct btrfs_file_extent_item, disk_num_bytes, 64); 2368 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2369 struct btrfs_file_extent_item, compression, 8); 2370 2371 static inline unsigned long 2372 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2373 { 2374 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2375 } 2376 2377 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2378 { 2379 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2380 } 2381 2382 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2383 disk_bytenr, 64); 2384 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2385 generation, 64); 2386 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2387 disk_num_bytes, 64); 2388 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2389 offset, 64); 2390 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2391 num_bytes, 64); 2392 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2393 ram_bytes, 64); 2394 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2395 compression, 8); 2396 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2397 encryption, 8); 2398 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2399 other_encoding, 16); 2400 2401 /* 2402 * this returns the number of bytes used by the item on disk, minus the 2403 * size of any extent headers. If a file is compressed on disk, this is 2404 * the compressed size 2405 */ 2406 static inline u32 btrfs_file_extent_inline_item_len( 2407 const struct extent_buffer *eb, 2408 struct btrfs_item *e) 2409 { 2410 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2411 } 2412 2413 /* this returns the number of file bytes represented by the inline item. 2414 * If an item is compressed, this is the uncompressed size 2415 */ 2416 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb, 2417 int slot, 2418 const struct btrfs_file_extent_item *fi) 2419 { 2420 struct btrfs_map_token token; 2421 2422 btrfs_init_map_token(&token); 2423 /* 2424 * return the space used on disk if this item isn't 2425 * compressed or encoded 2426 */ 2427 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2428 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2429 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2430 return btrfs_file_extent_inline_item_len(eb, 2431 btrfs_item_nr(slot)); 2432 } 2433 2434 /* otherwise use the ram bytes field */ 2435 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2436 } 2437 2438 2439 /* btrfs_dev_stats_item */ 2440 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2441 const struct btrfs_dev_stats_item *ptr, 2442 int index) 2443 { 2444 u64 val; 2445 2446 read_extent_buffer(eb, &val, 2447 offsetof(struct btrfs_dev_stats_item, values) + 2448 ((unsigned long)ptr) + (index * sizeof(u64)), 2449 sizeof(val)); 2450 return val; 2451 } 2452 2453 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2454 struct btrfs_dev_stats_item *ptr, 2455 int index, u64 val) 2456 { 2457 write_extent_buffer(eb, &val, 2458 offsetof(struct btrfs_dev_stats_item, values) + 2459 ((unsigned long)ptr) + (index * sizeof(u64)), 2460 sizeof(val)); 2461 } 2462 2463 /* btrfs_qgroup_status_item */ 2464 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2465 generation, 64); 2466 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2467 version, 64); 2468 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2469 flags, 64); 2470 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2471 rescan, 64); 2472 2473 /* btrfs_qgroup_info_item */ 2474 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2475 generation, 64); 2476 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2477 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2478 rfer_cmpr, 64); 2479 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2480 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2481 excl_cmpr, 64); 2482 2483 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2484 struct btrfs_qgroup_info_item, generation, 64); 2485 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2486 rfer, 64); 2487 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2488 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2489 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2490 excl, 64); 2491 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2492 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2493 2494 /* btrfs_qgroup_limit_item */ 2495 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2496 flags, 64); 2497 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2498 max_rfer, 64); 2499 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2500 max_excl, 64); 2501 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2502 rsv_rfer, 64); 2503 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2504 rsv_excl, 64); 2505 2506 /* btrfs_dev_replace_item */ 2507 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2508 struct btrfs_dev_replace_item, src_devid, 64); 2509 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2510 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2511 64); 2512 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2513 replace_state, 64); 2514 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2515 time_started, 64); 2516 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2517 time_stopped, 64); 2518 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2519 num_write_errors, 64); 2520 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2521 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2522 64); 2523 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2524 cursor_left, 64); 2525 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2526 cursor_right, 64); 2527 2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2529 struct btrfs_dev_replace_item, src_devid, 64); 2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2531 struct btrfs_dev_replace_item, 2532 cont_reading_from_srcdev_mode, 64); 2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2534 struct btrfs_dev_replace_item, replace_state, 64); 2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2536 struct btrfs_dev_replace_item, time_started, 64); 2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2538 struct btrfs_dev_replace_item, time_stopped, 64); 2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2540 struct btrfs_dev_replace_item, num_write_errors, 64); 2541 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2542 struct btrfs_dev_replace_item, 2543 num_uncorrectable_read_errors, 64); 2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2545 struct btrfs_dev_replace_item, cursor_left, 64); 2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2547 struct btrfs_dev_replace_item, cursor_right, 64); 2548 2549 /* helper function to cast into the data area of the leaf. */ 2550 #define btrfs_item_ptr(leaf, slot, type) \ 2551 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2552 btrfs_item_offset_nr(leaf, slot))) 2553 2554 #define btrfs_item_ptr_offset(leaf, slot) \ 2555 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2556 btrfs_item_offset_nr(leaf, slot))) 2557 2558 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2559 { 2560 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2561 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2562 } 2563 2564 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2565 { 2566 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2567 } 2568 2569 /* extent-tree.c */ 2570 2571 enum btrfs_inline_ref_type { 2572 BTRFS_REF_TYPE_INVALID = 0, 2573 BTRFS_REF_TYPE_BLOCK = 1, 2574 BTRFS_REF_TYPE_DATA = 2, 2575 BTRFS_REF_TYPE_ANY = 3, 2576 }; 2577 2578 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2579 struct btrfs_extent_inline_ref *iref, 2580 enum btrfs_inline_ref_type is_data); 2581 2582 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2583 2584 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2585 unsigned num_items) 2586 { 2587 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2588 } 2589 2590 /* 2591 * Doing a truncate won't result in new nodes or leaves, just what we need for 2592 * COW. 2593 */ 2594 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2595 unsigned num_items) 2596 { 2597 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2598 } 2599 2600 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2601 struct btrfs_fs_info *fs_info); 2602 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2603 struct btrfs_fs_info *fs_info); 2604 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2605 const u64 start); 2606 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2607 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2608 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2609 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2610 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2611 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2612 struct btrfs_fs_info *fs_info, unsigned long count); 2613 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2614 unsigned long count, u64 transid, int wait); 2615 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2616 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2617 struct btrfs_fs_info *fs_info, u64 bytenr, 2618 u64 offset, int metadata, u64 *refs, u64 *flags); 2619 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2620 u64 bytenr, u64 num, int reserved); 2621 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2622 u64 bytenr, u64 num_bytes); 2623 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2624 struct extent_buffer *eb); 2625 int btrfs_cross_ref_exist(struct btrfs_root *root, 2626 u64 objectid, u64 offset, u64 bytenr); 2627 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2628 struct btrfs_fs_info *info, 2629 u64 bytenr); 2630 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2631 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2632 int get_block_group_index(struct btrfs_block_group_cache *cache); 2633 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2634 struct btrfs_root *root, 2635 u64 parent, u64 root_objectid, 2636 const struct btrfs_disk_key *key, 2637 int level, u64 hint, 2638 u64 empty_size); 2639 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2640 struct btrfs_root *root, 2641 struct extent_buffer *buf, 2642 u64 parent, int last_ref); 2643 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2644 struct btrfs_root *root, u64 owner, 2645 u64 offset, u64 ram_bytes, 2646 struct btrfs_key *ins); 2647 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2648 struct btrfs_fs_info *fs_info, 2649 u64 root_objectid, u64 owner, u64 offset, 2650 struct btrfs_key *ins); 2651 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2652 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2653 struct btrfs_key *ins, int is_data, int delalloc); 2654 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2655 struct extent_buffer *buf, int full_backref); 2656 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2657 struct extent_buffer *buf, int full_backref); 2658 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2659 struct btrfs_fs_info *fs_info, 2660 u64 bytenr, u64 num_bytes, u64 flags, 2661 int level, int is_data); 2662 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2663 struct btrfs_root *root, 2664 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2665 u64 owner, u64 offset); 2666 2667 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2668 u64 start, u64 len, int delalloc); 2669 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2670 u64 start, u64 len); 2671 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2672 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2673 struct btrfs_fs_info *fs_info); 2674 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2675 struct btrfs_root *root, 2676 u64 bytenr, u64 num_bytes, u64 parent, 2677 u64 root_objectid, u64 owner, u64 offset); 2678 2679 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, 2680 struct btrfs_fs_info *fs_info); 2681 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2682 struct btrfs_fs_info *fs_info); 2683 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2684 struct btrfs_fs_info *fs_info); 2685 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2686 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2687 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2688 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2689 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2690 struct btrfs_fs_info *fs_info, u64 bytes_used, 2691 u64 type, u64 chunk_offset, u64 size); 2692 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2693 struct btrfs_fs_info *fs_info, 2694 const u64 chunk_offset); 2695 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2696 struct btrfs_fs_info *fs_info, u64 group_start, 2697 struct extent_map *em); 2698 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2699 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2700 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2701 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, 2702 struct btrfs_fs_info *fs_info); 2703 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2704 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2705 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2706 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2707 2708 enum btrfs_reserve_flush_enum { 2709 /* If we are in the transaction, we can't flush anything.*/ 2710 BTRFS_RESERVE_NO_FLUSH, 2711 /* 2712 * Flushing delalloc may cause deadlock somewhere, in this 2713 * case, use FLUSH LIMIT 2714 */ 2715 BTRFS_RESERVE_FLUSH_LIMIT, 2716 BTRFS_RESERVE_FLUSH_ALL, 2717 }; 2718 2719 enum btrfs_flush_state { 2720 FLUSH_DELAYED_ITEMS_NR = 1, 2721 FLUSH_DELAYED_ITEMS = 2, 2722 FLUSH_DELALLOC = 3, 2723 FLUSH_DELALLOC_WAIT = 4, 2724 ALLOC_CHUNK = 5, 2725 COMMIT_TRANS = 6, 2726 }; 2727 2728 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2729 int btrfs_check_data_free_space(struct inode *inode, 2730 struct extent_changeset **reserved, u64 start, u64 len); 2731 void btrfs_free_reserved_data_space(struct inode *inode, 2732 struct extent_changeset *reserved, u64 start, u64 len); 2733 void btrfs_delalloc_release_space(struct inode *inode, 2734 struct extent_changeset *reserved, u64 start, u64 len); 2735 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2736 u64 len); 2737 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, 2738 struct btrfs_fs_info *fs_info); 2739 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2740 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2741 struct btrfs_inode *inode); 2742 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2743 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2744 struct btrfs_block_rsv *rsv, 2745 int nitems, 2746 u64 *qgroup_reserved, bool use_global_rsv); 2747 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2748 struct btrfs_block_rsv *rsv); 2749 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes); 2750 2751 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2752 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes); 2753 int btrfs_delalloc_reserve_space(struct inode *inode, 2754 struct extent_changeset **reserved, u64 start, u64 len); 2755 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2756 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2757 unsigned short type); 2758 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2759 struct btrfs_block_rsv *rsv, 2760 unsigned short type); 2761 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2762 struct btrfs_block_rsv *rsv); 2763 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2764 int btrfs_block_rsv_add(struct btrfs_root *root, 2765 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2766 enum btrfs_reserve_flush_enum flush); 2767 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2768 int btrfs_block_rsv_refill(struct btrfs_root *root, 2769 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2770 enum btrfs_reserve_flush_enum flush); 2771 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2772 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2773 int update_size); 2774 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2775 struct btrfs_block_rsv *dest, u64 num_bytes, 2776 int min_factor); 2777 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2778 struct btrfs_block_rsv *block_rsv, 2779 u64 num_bytes); 2780 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2781 struct btrfs_block_group_cache *cache); 2782 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2783 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2784 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2785 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2786 u64 start, u64 end); 2787 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2788 u64 num_bytes, u64 *actual_bytes); 2789 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2790 struct btrfs_fs_info *fs_info, u64 type); 2791 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2792 2793 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2794 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2795 struct btrfs_fs_info *fs_info); 2796 int __get_raid_index(u64 flags); 2797 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2798 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2799 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2800 void check_system_chunk(struct btrfs_trans_handle *trans, 2801 struct btrfs_fs_info *fs_info, const u64 type); 2802 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2803 struct btrfs_fs_info *info, u64 start, u64 end); 2804 2805 /* ctree.c */ 2806 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2807 int level, int *slot); 2808 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2809 int btrfs_previous_item(struct btrfs_root *root, 2810 struct btrfs_path *path, u64 min_objectid, 2811 int type); 2812 int btrfs_previous_extent_item(struct btrfs_root *root, 2813 struct btrfs_path *path, u64 min_objectid); 2814 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2815 struct btrfs_path *path, 2816 const struct btrfs_key *new_key); 2817 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2818 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2819 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2820 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2821 struct btrfs_key *key, int lowest_level, 2822 u64 min_trans); 2823 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2824 struct btrfs_path *path, 2825 u64 min_trans); 2826 enum btrfs_compare_tree_result { 2827 BTRFS_COMPARE_TREE_NEW, 2828 BTRFS_COMPARE_TREE_DELETED, 2829 BTRFS_COMPARE_TREE_CHANGED, 2830 BTRFS_COMPARE_TREE_SAME, 2831 }; 2832 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2833 struct btrfs_path *right_path, 2834 struct btrfs_key *key, 2835 enum btrfs_compare_tree_result result, 2836 void *ctx); 2837 int btrfs_compare_trees(struct btrfs_root *left_root, 2838 struct btrfs_root *right_root, 2839 btrfs_changed_cb_t cb, void *ctx); 2840 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2841 struct btrfs_root *root, struct extent_buffer *buf, 2842 struct extent_buffer *parent, int parent_slot, 2843 struct extent_buffer **cow_ret); 2844 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2845 struct btrfs_root *root, 2846 struct extent_buffer *buf, 2847 struct extent_buffer **cow_ret, u64 new_root_objectid); 2848 int btrfs_block_can_be_shared(struct btrfs_root *root, 2849 struct extent_buffer *buf); 2850 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2851 u32 data_size); 2852 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2853 struct btrfs_path *path, u32 new_size, int from_end); 2854 int btrfs_split_item(struct btrfs_trans_handle *trans, 2855 struct btrfs_root *root, 2856 struct btrfs_path *path, 2857 const struct btrfs_key *new_key, 2858 unsigned long split_offset); 2859 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2860 struct btrfs_root *root, 2861 struct btrfs_path *path, 2862 const struct btrfs_key *new_key); 2863 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2864 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2865 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2866 const struct btrfs_key *key, struct btrfs_path *p, 2867 int ins_len, int cow); 2868 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2869 struct btrfs_path *p, u64 time_seq); 2870 int btrfs_search_slot_for_read(struct btrfs_root *root, 2871 const struct btrfs_key *key, 2872 struct btrfs_path *p, int find_higher, 2873 int return_any); 2874 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2875 struct btrfs_root *root, struct extent_buffer *parent, 2876 int start_slot, u64 *last_ret, 2877 struct btrfs_key *progress); 2878 void btrfs_release_path(struct btrfs_path *p); 2879 struct btrfs_path *btrfs_alloc_path(void); 2880 void btrfs_free_path(struct btrfs_path *p); 2881 void btrfs_set_path_blocking(struct btrfs_path *p); 2882 void btrfs_clear_path_blocking(struct btrfs_path *p, 2883 struct extent_buffer *held, int held_rw); 2884 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2885 2886 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2887 struct btrfs_path *path, int slot, int nr); 2888 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2889 struct btrfs_root *root, 2890 struct btrfs_path *path) 2891 { 2892 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2893 } 2894 2895 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2896 const struct btrfs_key *cpu_key, u32 *data_size, 2897 u32 total_data, u32 total_size, int nr); 2898 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2899 const struct btrfs_key *key, void *data, u32 data_size); 2900 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2901 struct btrfs_root *root, 2902 struct btrfs_path *path, 2903 const struct btrfs_key *cpu_key, u32 *data_size, 2904 int nr); 2905 2906 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2907 struct btrfs_root *root, 2908 struct btrfs_path *path, 2909 const struct btrfs_key *key, 2910 u32 data_size) 2911 { 2912 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2913 } 2914 2915 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2916 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2917 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2918 u64 time_seq); 2919 static inline int btrfs_next_old_item(struct btrfs_root *root, 2920 struct btrfs_path *p, u64 time_seq) 2921 { 2922 ++p->slots[0]; 2923 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2924 return btrfs_next_old_leaf(root, p, time_seq); 2925 return 0; 2926 } 2927 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2928 { 2929 return btrfs_next_old_item(root, p, 0); 2930 } 2931 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2932 struct extent_buffer *leaf); 2933 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2934 struct btrfs_block_rsv *block_rsv, 2935 int update_ref, int for_reloc); 2936 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2937 struct btrfs_root *root, 2938 struct extent_buffer *node, 2939 struct extent_buffer *parent); 2940 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2941 { 2942 /* 2943 * Do it this way so we only ever do one test_bit in the normal case. 2944 */ 2945 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2946 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2947 return 2; 2948 return 1; 2949 } 2950 return 0; 2951 } 2952 2953 /* 2954 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2955 * anything except sleeping. This function is used to check the status of 2956 * the fs. 2957 */ 2958 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2959 { 2960 return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info); 2961 } 2962 2963 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2964 { 2965 kfree(fs_info->balance_ctl); 2966 kfree(fs_info->delayed_root); 2967 kfree(fs_info->extent_root); 2968 kfree(fs_info->tree_root); 2969 kfree(fs_info->chunk_root); 2970 kfree(fs_info->dev_root); 2971 kfree(fs_info->csum_root); 2972 kfree(fs_info->quota_root); 2973 kfree(fs_info->uuid_root); 2974 kfree(fs_info->free_space_root); 2975 kfree(fs_info->super_copy); 2976 kfree(fs_info->super_for_commit); 2977 security_free_mnt_opts(&fs_info->security_opts); 2978 kfree(fs_info); 2979 } 2980 2981 /* tree mod log functions from ctree.c */ 2982 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2983 struct seq_list *elem); 2984 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2985 struct seq_list *elem); 2986 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2987 2988 /* root-item.c */ 2989 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2990 struct btrfs_fs_info *fs_info, 2991 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2992 const char *name, int name_len); 2993 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2994 struct btrfs_fs_info *fs_info, 2995 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2996 const char *name, int name_len); 2997 int btrfs_del_root(struct btrfs_trans_handle *trans, 2998 struct btrfs_fs_info *fs_info, const struct btrfs_key *key); 2999 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 3000 const struct btrfs_key *key, 3001 struct btrfs_root_item *item); 3002 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3003 struct btrfs_root *root, 3004 struct btrfs_key *key, 3005 struct btrfs_root_item *item); 3006 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3007 struct btrfs_path *path, struct btrfs_root_item *root_item, 3008 struct btrfs_key *root_key); 3009 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3010 void btrfs_set_root_node(struct btrfs_root_item *item, 3011 struct extent_buffer *node); 3012 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3013 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3014 struct btrfs_root *root); 3015 3016 /* uuid-tree.c */ 3017 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 3018 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3019 u64 subid); 3020 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 3021 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3022 u64 subid); 3023 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3024 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3025 u64)); 3026 3027 /* dir-item.c */ 3028 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3029 const char *name, int name_len); 3030 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3031 struct btrfs_root *root, const char *name, 3032 int name_len, struct btrfs_inode *dir, 3033 struct btrfs_key *location, u8 type, u64 index); 3034 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3035 struct btrfs_root *root, 3036 struct btrfs_path *path, u64 dir, 3037 const char *name, int name_len, 3038 int mod); 3039 struct btrfs_dir_item * 3040 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3041 struct btrfs_root *root, 3042 struct btrfs_path *path, u64 dir, 3043 u64 objectid, const char *name, int name_len, 3044 int mod); 3045 struct btrfs_dir_item * 3046 btrfs_search_dir_index_item(struct btrfs_root *root, 3047 struct btrfs_path *path, u64 dirid, 3048 const char *name, int name_len); 3049 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3050 struct btrfs_root *root, 3051 struct btrfs_path *path, 3052 struct btrfs_dir_item *di); 3053 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3054 struct btrfs_root *root, 3055 struct btrfs_path *path, u64 objectid, 3056 const char *name, u16 name_len, 3057 const void *data, u16 data_len); 3058 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3059 struct btrfs_root *root, 3060 struct btrfs_path *path, u64 dir, 3061 const char *name, u16 name_len, 3062 int mod); 3063 int verify_dir_item(struct btrfs_fs_info *fs_info, 3064 struct extent_buffer *leaf, int slot, 3065 struct btrfs_dir_item *dir_item); 3066 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3067 struct btrfs_path *path, 3068 const char *name, 3069 int name_len); 3070 bool btrfs_is_name_len_valid(struct extent_buffer *leaf, int slot, 3071 unsigned long start, u16 name_len); 3072 3073 /* orphan.c */ 3074 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3075 struct btrfs_root *root, u64 offset); 3076 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3077 struct btrfs_root *root, u64 offset); 3078 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3079 3080 /* inode-item.c */ 3081 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3082 struct btrfs_root *root, 3083 const char *name, int name_len, 3084 u64 inode_objectid, u64 ref_objectid, u64 index); 3085 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3086 struct btrfs_root *root, 3087 const char *name, int name_len, 3088 u64 inode_objectid, u64 ref_objectid, u64 *index); 3089 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3090 struct btrfs_root *root, 3091 struct btrfs_path *path, u64 objectid); 3092 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3093 *root, struct btrfs_path *path, 3094 struct btrfs_key *location, int mod); 3095 3096 struct btrfs_inode_extref * 3097 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3098 struct btrfs_root *root, 3099 struct btrfs_path *path, 3100 const char *name, int name_len, 3101 u64 inode_objectid, u64 ref_objectid, int ins_len, 3102 int cow); 3103 3104 int btrfs_find_name_in_ext_backref(struct btrfs_path *path, 3105 u64 ref_objectid, const char *name, 3106 int name_len, 3107 struct btrfs_inode_extref **extref_ret); 3108 3109 /* file-item.c */ 3110 struct btrfs_dio_private; 3111 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3112 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3113 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3114 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3115 u64 logical_offset); 3116 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3117 struct btrfs_root *root, 3118 u64 objectid, u64 pos, 3119 u64 disk_offset, u64 disk_num_bytes, 3120 u64 num_bytes, u64 offset, u64 ram_bytes, 3121 u8 compression, u8 encryption, u16 other_encoding); 3122 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3123 struct btrfs_root *root, 3124 struct btrfs_path *path, u64 objectid, 3125 u64 bytenr, int mod); 3126 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3127 struct btrfs_root *root, 3128 struct btrfs_ordered_sum *sums); 3129 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3130 u64 file_start, int contig); 3131 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3132 struct list_head *list, int search_commit); 3133 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3134 const struct btrfs_path *path, 3135 struct btrfs_file_extent_item *fi, 3136 const bool new_inline, 3137 struct extent_map *em); 3138 3139 /* inode.c */ 3140 struct btrfs_delalloc_work { 3141 struct inode *inode; 3142 int delay_iput; 3143 struct completion completion; 3144 struct list_head list; 3145 struct btrfs_work work; 3146 }; 3147 3148 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3149 int delay_iput); 3150 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3151 3152 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3153 struct page *page, size_t pg_offset, u64 start, 3154 u64 len, int create); 3155 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3156 u64 *orig_start, u64 *orig_block_len, 3157 u64 *ram_bytes); 3158 3159 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3160 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3161 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3162 struct btrfs_root *root, 3163 struct btrfs_inode *dir, struct btrfs_inode *inode, 3164 const char *name, int name_len); 3165 int btrfs_add_link(struct btrfs_trans_handle *trans, 3166 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3167 const char *name, int name_len, int add_backref, u64 index); 3168 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3169 struct btrfs_root *root, 3170 struct inode *dir, u64 objectid, 3171 const char *name, int name_len); 3172 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3173 int front); 3174 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3175 struct btrfs_root *root, 3176 struct inode *inode, u64 new_size, 3177 u32 min_type); 3178 3179 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3180 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3181 int nr); 3182 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3183 struct extent_state **cached_state, int dedupe); 3184 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3185 struct btrfs_root *new_root, 3186 struct btrfs_root *parent_root, 3187 u64 new_dirid); 3188 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3189 size_t size, struct bio *bio, 3190 unsigned long bio_flags); 3191 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3192 int btrfs_page_mkwrite(struct vm_fault *vmf); 3193 int btrfs_readpage(struct file *file, struct page *page); 3194 void btrfs_evict_inode(struct inode *inode); 3195 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3196 struct inode *btrfs_alloc_inode(struct super_block *sb); 3197 void btrfs_destroy_inode(struct inode *inode); 3198 int btrfs_drop_inode(struct inode *inode); 3199 int btrfs_init_cachep(void); 3200 void btrfs_destroy_cachep(void); 3201 long btrfs_ioctl_trans_end(struct file *file); 3202 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3203 struct btrfs_root *root, int *was_new); 3204 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3205 struct page *page, size_t pg_offset, 3206 u64 start, u64 end, int create); 3207 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3208 struct btrfs_root *root, 3209 struct inode *inode); 3210 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3211 struct btrfs_root *root, struct inode *inode); 3212 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3213 struct btrfs_inode *inode); 3214 int btrfs_orphan_cleanup(struct btrfs_root *root); 3215 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3216 struct btrfs_root *root); 3217 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3218 void btrfs_invalidate_inodes(struct btrfs_root *root); 3219 void btrfs_add_delayed_iput(struct inode *inode); 3220 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3221 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3222 u64 start, u64 num_bytes, u64 min_size, 3223 loff_t actual_len, u64 *alloc_hint); 3224 int btrfs_prealloc_file_range_trans(struct inode *inode, 3225 struct btrfs_trans_handle *trans, int mode, 3226 u64 start, u64 num_bytes, u64 min_size, 3227 loff_t actual_len, u64 *alloc_hint); 3228 extern const struct dentry_operations btrfs_dentry_operations; 3229 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3230 void btrfs_test_inode_set_ops(struct inode *inode); 3231 #endif 3232 3233 /* ioctl.c */ 3234 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3235 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3236 int btrfs_ioctl_get_supported_features(void __user *arg); 3237 void btrfs_update_iflags(struct inode *inode); 3238 int btrfs_is_empty_uuid(u8 *uuid); 3239 int btrfs_defrag_file(struct inode *inode, struct file *file, 3240 struct btrfs_ioctl_defrag_range_args *range, 3241 u64 newer_than, unsigned long max_pages); 3242 void btrfs_get_block_group_info(struct list_head *groups_list, 3243 struct btrfs_ioctl_space_info *space); 3244 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3245 struct btrfs_ioctl_balance_args *bargs); 3246 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3247 struct file *dst_file, u64 dst_loff); 3248 3249 /* file.c */ 3250 int btrfs_auto_defrag_init(void); 3251 void btrfs_auto_defrag_exit(void); 3252 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3253 struct btrfs_inode *inode); 3254 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3255 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3256 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3257 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3258 int skip_pinned); 3259 extern const struct file_operations btrfs_file_operations; 3260 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3261 struct btrfs_root *root, struct inode *inode, 3262 struct btrfs_path *path, u64 start, u64 end, 3263 u64 *drop_end, int drop_cache, 3264 int replace_extent, 3265 u32 extent_item_size, 3266 int *key_inserted); 3267 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3268 struct btrfs_root *root, struct inode *inode, u64 start, 3269 u64 end, int drop_cache); 3270 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3271 struct btrfs_inode *inode, u64 start, u64 end); 3272 int btrfs_release_file(struct inode *inode, struct file *file); 3273 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3274 size_t num_pages, loff_t pos, size_t write_bytes, 3275 struct extent_state **cached); 3276 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3277 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3278 struct file *file_out, loff_t pos_out, u64 len); 3279 3280 /* tree-defrag.c */ 3281 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3282 struct btrfs_root *root); 3283 3284 /* sysfs.c */ 3285 int btrfs_init_sysfs(void); 3286 void btrfs_exit_sysfs(void); 3287 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3288 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3289 3290 /* xattr.c */ 3291 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 3292 3293 /* super.c */ 3294 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3295 unsigned long new_flags); 3296 int btrfs_sync_fs(struct super_block *sb, int wait); 3297 3298 static inline __printf(2, 3) 3299 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3300 { 3301 } 3302 3303 #ifdef CONFIG_PRINTK 3304 __printf(2, 3) 3305 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3306 #else 3307 #define btrfs_printk(fs_info, fmt, args...) \ 3308 btrfs_no_printk(fs_info, fmt, ##args) 3309 #endif 3310 3311 #define btrfs_emerg(fs_info, fmt, args...) \ 3312 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3313 #define btrfs_alert(fs_info, fmt, args...) \ 3314 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3315 #define btrfs_crit(fs_info, fmt, args...) \ 3316 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3317 #define btrfs_err(fs_info, fmt, args...) \ 3318 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3319 #define btrfs_warn(fs_info, fmt, args...) \ 3320 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3321 #define btrfs_notice(fs_info, fmt, args...) \ 3322 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3323 #define btrfs_info(fs_info, fmt, args...) \ 3324 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3325 3326 /* 3327 * Wrappers that use printk_in_rcu 3328 */ 3329 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3330 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3331 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3332 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3333 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3334 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3335 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3336 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3337 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3338 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3339 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3340 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3341 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3342 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3343 3344 /* 3345 * Wrappers that use a ratelimited printk_in_rcu 3346 */ 3347 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3348 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3349 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3350 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3351 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3352 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3353 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3354 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3355 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3356 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3357 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3358 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3359 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3360 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3361 3362 /* 3363 * Wrappers that use a ratelimited printk 3364 */ 3365 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3366 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3367 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3368 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3369 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3370 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3371 #define btrfs_err_rl(fs_info, fmt, args...) \ 3372 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3373 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3374 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3375 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3376 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3377 #define btrfs_info_rl(fs_info, fmt, args...) \ 3378 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3379 3380 #if defined(CONFIG_DYNAMIC_DEBUG) 3381 #define btrfs_debug(fs_info, fmt, args...) \ 3382 do { \ 3383 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3384 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3385 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3386 } while (0) 3387 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3388 do { \ 3389 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3390 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3391 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3392 } while (0) 3393 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3394 do { \ 3395 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3396 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3397 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3398 ##args);\ 3399 } while (0) 3400 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3401 do { \ 3402 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3403 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3404 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3405 ##args); \ 3406 } while (0) 3407 #elif defined(DEBUG) 3408 #define btrfs_debug(fs_info, fmt, args...) \ 3409 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3410 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3411 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3412 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3413 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3414 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3415 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3416 #else 3417 #define btrfs_debug(fs_info, fmt, args...) \ 3418 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3419 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3420 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3421 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3422 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3423 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3424 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3425 #endif 3426 3427 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3428 do { \ 3429 rcu_read_lock(); \ 3430 btrfs_printk(fs_info, fmt, ##args); \ 3431 rcu_read_unlock(); \ 3432 } while (0) 3433 3434 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3435 do { \ 3436 static DEFINE_RATELIMIT_STATE(_rs, \ 3437 DEFAULT_RATELIMIT_INTERVAL, \ 3438 DEFAULT_RATELIMIT_BURST); \ 3439 if (__ratelimit(&_rs)) \ 3440 btrfs_printk(fs_info, fmt, ##args); \ 3441 } while (0) 3442 3443 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3444 do { \ 3445 rcu_read_lock(); \ 3446 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3447 rcu_read_unlock(); \ 3448 } while (0) 3449 3450 #ifdef CONFIG_BTRFS_ASSERT 3451 3452 __cold 3453 static inline void assfail(char *expr, char *file, int line) 3454 { 3455 pr_err("assertion failed: %s, file: %s, line: %d\n", 3456 expr, file, line); 3457 BUG(); 3458 } 3459 3460 #define ASSERT(expr) \ 3461 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3462 #else 3463 #define ASSERT(expr) ((void)0) 3464 #endif 3465 3466 __printf(5, 6) 3467 __cold 3468 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3469 unsigned int line, int errno, const char *fmt, ...); 3470 3471 const char *btrfs_decode_error(int errno); 3472 3473 __cold 3474 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3475 const char *function, 3476 unsigned int line, int errno); 3477 3478 /* 3479 * Call btrfs_abort_transaction as early as possible when an error condition is 3480 * detected, that way the exact line number is reported. 3481 */ 3482 #define btrfs_abort_transaction(trans, errno) \ 3483 do { \ 3484 /* Report first abort since mount */ \ 3485 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3486 &((trans)->fs_info->fs_state))) { \ 3487 if ((errno) != -EIO) { \ 3488 WARN(1, KERN_DEBUG \ 3489 "BTRFS: Transaction aborted (error %d)\n", \ 3490 (errno)); \ 3491 } else { \ 3492 btrfs_debug((trans)->fs_info, \ 3493 "Transaction aborted (error %d)", \ 3494 (errno)); \ 3495 } \ 3496 } \ 3497 __btrfs_abort_transaction((trans), __func__, \ 3498 __LINE__, (errno)); \ 3499 } while (0) 3500 3501 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3502 do { \ 3503 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3504 (errno), fmt, ##args); \ 3505 } while (0) 3506 3507 __printf(5, 6) 3508 __cold 3509 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3510 unsigned int line, int errno, const char *fmt, ...); 3511 /* 3512 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3513 * will panic(). Otherwise we BUG() here. 3514 */ 3515 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3516 do { \ 3517 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3518 BUG(); \ 3519 } while (0) 3520 3521 3522 /* compatibility and incompatibility defines */ 3523 3524 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3525 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3526 3527 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3528 u64 flag) 3529 { 3530 struct btrfs_super_block *disk_super; 3531 u64 features; 3532 3533 disk_super = fs_info->super_copy; 3534 features = btrfs_super_incompat_flags(disk_super); 3535 if (!(features & flag)) { 3536 spin_lock(&fs_info->super_lock); 3537 features = btrfs_super_incompat_flags(disk_super); 3538 if (!(features & flag)) { 3539 features |= flag; 3540 btrfs_set_super_incompat_flags(disk_super, features); 3541 btrfs_info(fs_info, "setting %llu feature flag", 3542 flag); 3543 } 3544 spin_unlock(&fs_info->super_lock); 3545 } 3546 } 3547 3548 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3549 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3550 3551 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3552 u64 flag) 3553 { 3554 struct btrfs_super_block *disk_super; 3555 u64 features; 3556 3557 disk_super = fs_info->super_copy; 3558 features = btrfs_super_incompat_flags(disk_super); 3559 if (features & flag) { 3560 spin_lock(&fs_info->super_lock); 3561 features = btrfs_super_incompat_flags(disk_super); 3562 if (features & flag) { 3563 features &= ~flag; 3564 btrfs_set_super_incompat_flags(disk_super, features); 3565 btrfs_info(fs_info, "clearing %llu feature flag", 3566 flag); 3567 } 3568 spin_unlock(&fs_info->super_lock); 3569 } 3570 } 3571 3572 #define btrfs_fs_incompat(fs_info, opt) \ 3573 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3574 3575 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3576 { 3577 struct btrfs_super_block *disk_super; 3578 disk_super = fs_info->super_copy; 3579 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3580 } 3581 3582 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3583 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3584 3585 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3586 u64 flag) 3587 { 3588 struct btrfs_super_block *disk_super; 3589 u64 features; 3590 3591 disk_super = fs_info->super_copy; 3592 features = btrfs_super_compat_ro_flags(disk_super); 3593 if (!(features & flag)) { 3594 spin_lock(&fs_info->super_lock); 3595 features = btrfs_super_compat_ro_flags(disk_super); 3596 if (!(features & flag)) { 3597 features |= flag; 3598 btrfs_set_super_compat_ro_flags(disk_super, features); 3599 btrfs_info(fs_info, "setting %llu ro feature flag", 3600 flag); 3601 } 3602 spin_unlock(&fs_info->super_lock); 3603 } 3604 } 3605 3606 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3607 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3608 3609 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3610 u64 flag) 3611 { 3612 struct btrfs_super_block *disk_super; 3613 u64 features; 3614 3615 disk_super = fs_info->super_copy; 3616 features = btrfs_super_compat_ro_flags(disk_super); 3617 if (features & flag) { 3618 spin_lock(&fs_info->super_lock); 3619 features = btrfs_super_compat_ro_flags(disk_super); 3620 if (features & flag) { 3621 features &= ~flag; 3622 btrfs_set_super_compat_ro_flags(disk_super, features); 3623 btrfs_info(fs_info, "clearing %llu ro feature flag", 3624 flag); 3625 } 3626 spin_unlock(&fs_info->super_lock); 3627 } 3628 } 3629 3630 #define btrfs_fs_compat_ro(fs_info, opt) \ 3631 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3632 3633 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3634 { 3635 struct btrfs_super_block *disk_super; 3636 disk_super = fs_info->super_copy; 3637 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3638 } 3639 3640 /* acl.c */ 3641 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3642 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3643 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3644 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3645 struct inode *inode, struct inode *dir); 3646 #else 3647 #define btrfs_get_acl NULL 3648 #define btrfs_set_acl NULL 3649 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3650 struct inode *inode, struct inode *dir) 3651 { 3652 return 0; 3653 } 3654 #endif 3655 3656 /* relocation.c */ 3657 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3658 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3659 struct btrfs_root *root); 3660 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3661 struct btrfs_root *root); 3662 int btrfs_recover_relocation(struct btrfs_root *root); 3663 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3664 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3665 struct btrfs_root *root, struct extent_buffer *buf, 3666 struct extent_buffer *cow); 3667 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3668 u64 *bytes_to_reserve); 3669 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3670 struct btrfs_pending_snapshot *pending); 3671 3672 /* scrub.c */ 3673 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3674 u64 end, struct btrfs_scrub_progress *progress, 3675 int readonly, int is_dev_replace); 3676 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3677 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3678 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3679 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3680 struct btrfs_device *dev); 3681 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3682 struct btrfs_scrub_progress *progress); 3683 static inline void btrfs_init_full_stripe_locks_tree( 3684 struct btrfs_full_stripe_locks_tree *locks_root) 3685 { 3686 locks_root->root = RB_ROOT; 3687 mutex_init(&locks_root->lock); 3688 } 3689 3690 /* dev-replace.c */ 3691 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3692 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3693 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3694 3695 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3696 { 3697 btrfs_bio_counter_sub(fs_info, 1); 3698 } 3699 3700 /* reada.c */ 3701 struct reada_control { 3702 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3703 struct btrfs_key key_start; 3704 struct btrfs_key key_end; /* exclusive */ 3705 atomic_t elems; 3706 struct kref refcnt; 3707 wait_queue_head_t wait; 3708 }; 3709 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3710 struct btrfs_key *start, struct btrfs_key *end); 3711 int btrfs_reada_wait(void *handle); 3712 void btrfs_reada_detach(void *handle); 3713 int btree_readahead_hook(struct extent_buffer *eb, int err); 3714 3715 static inline int is_fstree(u64 rootid) 3716 { 3717 if (rootid == BTRFS_FS_TREE_OBJECTID || 3718 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3719 !btrfs_qgroup_level(rootid))) 3720 return 1; 3721 return 0; 3722 } 3723 3724 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3725 { 3726 return signal_pending(current); 3727 } 3728 3729 /* Sanity test specific functions */ 3730 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3731 void btrfs_test_destroy_inode(struct inode *inode); 3732 #endif 3733 3734 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3735 { 3736 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3737 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3738 &fs_info->fs_state))) 3739 return 1; 3740 #endif 3741 return 0; 3742 } 3743 #endif 3744