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 <linux/crc32c.h> 44 #include "extent_io.h" 45 #include "extent_map.h" 46 #include "async-thread.h" 47 48 struct btrfs_trans_handle; 49 struct btrfs_transaction; 50 struct btrfs_pending_snapshot; 51 extern struct kmem_cache *btrfs_trans_handle_cachep; 52 extern struct kmem_cache *btrfs_bit_radix_cachep; 53 extern struct kmem_cache *btrfs_path_cachep; 54 extern struct kmem_cache *btrfs_free_space_cachep; 55 struct btrfs_ordered_sum; 56 57 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 58 #define STATIC noinline 59 #else 60 #define STATIC static noinline 61 #endif 62 63 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 64 65 #define BTRFS_MAX_MIRRORS 3 66 67 #define BTRFS_MAX_LEVEL 8 68 69 #define BTRFS_OLDEST_GENERATION 0ULL 70 71 #define BTRFS_COMPAT_EXTENT_TREE_V0 72 73 /* 74 * the max metadata block size. This limit is somewhat artificial, 75 * but the memmove costs go through the roof for larger blocks. 76 */ 77 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 78 79 /* 80 * we can actually store much bigger names, but lets not confuse the rest 81 * of linux 82 */ 83 #define BTRFS_NAME_LEN 255 84 85 /* 86 * Theoretical limit is larger, but we keep this down to a sane 87 * value. That should limit greatly the possibility of collisions on 88 * inode ref items. 89 */ 90 #define BTRFS_LINK_MAX 65535U 91 92 /* four bytes for CRC32 */ 93 static const int btrfs_csum_sizes[] = { 4 }; 94 95 #define BTRFS_EMPTY_DIR_SIZE 0 96 97 /* ioprio of readahead is set to idle */ 98 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 99 100 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 101 102 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 103 104 105 /* 106 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 107 */ 108 static inline u32 count_max_extents(u64 size) 109 { 110 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 111 } 112 113 struct btrfs_mapping_tree { 114 struct extent_map_tree map_tree; 115 }; 116 117 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 118 { 119 BUG_ON(num_stripes == 0); 120 return sizeof(struct btrfs_chunk) + 121 sizeof(struct btrfs_stripe) * (num_stripes - 1); 122 } 123 124 /* 125 * File system states 126 */ 127 #define BTRFS_FS_STATE_ERROR 0 128 #define BTRFS_FS_STATE_REMOUNTING 1 129 #define BTRFS_FS_STATE_TRANS_ABORTED 2 130 #define BTRFS_FS_STATE_DEV_REPLACING 3 131 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 132 133 #define BTRFS_BACKREF_REV_MAX 256 134 #define BTRFS_BACKREF_REV_SHIFT 56 135 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 136 BTRFS_BACKREF_REV_SHIFT) 137 138 #define BTRFS_OLD_BACKREF_REV 0 139 #define BTRFS_MIXED_BACKREF_REV 1 140 141 /* 142 * every tree block (leaf or node) starts with this header. 143 */ 144 struct btrfs_header { 145 /* these first four must match the super block */ 146 u8 csum[BTRFS_CSUM_SIZE]; 147 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 148 __le64 bytenr; /* which block this node is supposed to live in */ 149 __le64 flags; 150 151 /* allowed to be different from the super from here on down */ 152 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 153 __le64 generation; 154 __le64 owner; 155 __le32 nritems; 156 u8 level; 157 } __attribute__ ((__packed__)); 158 159 /* 160 * this is a very generous portion of the super block, giving us 161 * room to translate 14 chunks with 3 stripes each. 162 */ 163 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 164 165 /* 166 * just in case we somehow lose the roots and are not able to mount, 167 * we store an array of the roots from previous transactions 168 * in the super. 169 */ 170 #define BTRFS_NUM_BACKUP_ROOTS 4 171 struct btrfs_root_backup { 172 __le64 tree_root; 173 __le64 tree_root_gen; 174 175 __le64 chunk_root; 176 __le64 chunk_root_gen; 177 178 __le64 extent_root; 179 __le64 extent_root_gen; 180 181 __le64 fs_root; 182 __le64 fs_root_gen; 183 184 __le64 dev_root; 185 __le64 dev_root_gen; 186 187 __le64 csum_root; 188 __le64 csum_root_gen; 189 190 __le64 total_bytes; 191 __le64 bytes_used; 192 __le64 num_devices; 193 /* future */ 194 __le64 unused_64[4]; 195 196 u8 tree_root_level; 197 u8 chunk_root_level; 198 u8 extent_root_level; 199 u8 fs_root_level; 200 u8 dev_root_level; 201 u8 csum_root_level; 202 /* future and to align */ 203 u8 unused_8[10]; 204 } __attribute__ ((__packed__)); 205 206 /* 207 * the super block basically lists the main trees of the FS 208 * it currently lacks any block count etc etc 209 */ 210 struct btrfs_super_block { 211 u8 csum[BTRFS_CSUM_SIZE]; 212 /* the first 4 fields must match struct btrfs_header */ 213 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 214 __le64 bytenr; /* this block number */ 215 __le64 flags; 216 217 /* allowed to be different from the btrfs_header from here own down */ 218 __le64 magic; 219 __le64 generation; 220 __le64 root; 221 __le64 chunk_root; 222 __le64 log_root; 223 224 /* this will help find the new super based on the log root */ 225 __le64 log_root_transid; 226 __le64 total_bytes; 227 __le64 bytes_used; 228 __le64 root_dir_objectid; 229 __le64 num_devices; 230 __le32 sectorsize; 231 __le32 nodesize; 232 __le32 __unused_leafsize; 233 __le32 stripesize; 234 __le32 sys_chunk_array_size; 235 __le64 chunk_root_generation; 236 __le64 compat_flags; 237 __le64 compat_ro_flags; 238 __le64 incompat_flags; 239 __le16 csum_type; 240 u8 root_level; 241 u8 chunk_root_level; 242 u8 log_root_level; 243 struct btrfs_dev_item dev_item; 244 245 char label[BTRFS_LABEL_SIZE]; 246 247 __le64 cache_generation; 248 __le64 uuid_tree_generation; 249 250 /* future expansion */ 251 __le64 reserved[30]; 252 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 253 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 254 } __attribute__ ((__packed__)); 255 256 /* 257 * Compat flags that we support. If any incompat flags are set other than the 258 * ones specified below then we will fail to mount 259 */ 260 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 261 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 262 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 263 264 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 265 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 266 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 267 268 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 269 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 270 271 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 272 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 273 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 274 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 275 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 276 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 277 BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ 278 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 279 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 280 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 281 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 282 283 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 284 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 285 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 286 287 /* 288 * A leaf is full of items. offset and size tell us where to find 289 * the item in the leaf (relative to the start of the data area) 290 */ 291 struct btrfs_item { 292 struct btrfs_disk_key key; 293 __le32 offset; 294 __le32 size; 295 } __attribute__ ((__packed__)); 296 297 /* 298 * leaves have an item area and a data area: 299 * [item0, item1....itemN] [free space] [dataN...data1, data0] 300 * 301 * The data is separate from the items to get the keys closer together 302 * during searches. 303 */ 304 struct btrfs_leaf { 305 struct btrfs_header header; 306 struct btrfs_item items[]; 307 } __attribute__ ((__packed__)); 308 309 /* 310 * all non-leaf blocks are nodes, they hold only keys and pointers to 311 * other blocks 312 */ 313 struct btrfs_key_ptr { 314 struct btrfs_disk_key key; 315 __le64 blockptr; 316 __le64 generation; 317 } __attribute__ ((__packed__)); 318 319 struct btrfs_node { 320 struct btrfs_header header; 321 struct btrfs_key_ptr ptrs[]; 322 } __attribute__ ((__packed__)); 323 324 /* 325 * btrfs_paths remember the path taken from the root down to the leaf. 326 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 327 * to any other levels that are present. 328 * 329 * The slots array records the index of the item or block pointer 330 * used while walking the tree. 331 */ 332 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 333 struct btrfs_path { 334 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 335 int slots[BTRFS_MAX_LEVEL]; 336 /* if there is real range locking, this locks field will change */ 337 u8 locks[BTRFS_MAX_LEVEL]; 338 u8 reada; 339 /* keep some upper locks as we walk down */ 340 u8 lowest_level; 341 342 /* 343 * set by btrfs_split_item, tells search_slot to keep all locks 344 * and to force calls to keep space in the nodes 345 */ 346 unsigned int search_for_split:1; 347 unsigned int keep_locks:1; 348 unsigned int skip_locking:1; 349 unsigned int leave_spinning:1; 350 unsigned int search_commit_root:1; 351 unsigned int need_commit_sem:1; 352 unsigned int skip_release_on_error:1; 353 }; 354 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 355 sizeof(struct btrfs_item)) 356 struct btrfs_dev_replace { 357 u64 replace_state; /* see #define above */ 358 u64 time_started; /* seconds since 1-Jan-1970 */ 359 u64 time_stopped; /* seconds since 1-Jan-1970 */ 360 atomic64_t num_write_errors; 361 atomic64_t num_uncorrectable_read_errors; 362 363 u64 cursor_left; 364 u64 committed_cursor_left; 365 u64 cursor_left_last_write_of_item; 366 u64 cursor_right; 367 368 u64 cont_reading_from_srcdev_mode; /* see #define above */ 369 370 int is_valid; 371 int item_needs_writeback; 372 struct btrfs_device *srcdev; 373 struct btrfs_device *tgtdev; 374 375 pid_t lock_owner; 376 atomic_t nesting_level; 377 struct mutex lock_finishing_cancel_unmount; 378 rwlock_t lock; 379 atomic_t read_locks; 380 atomic_t blocking_readers; 381 wait_queue_head_t read_lock_wq; 382 383 struct btrfs_scrub_progress scrub_progress; 384 }; 385 386 /* For raid type sysfs entries */ 387 struct raid_kobject { 388 u64 flags; 389 struct kobject kobj; 390 struct list_head list; 391 }; 392 393 struct btrfs_space_info { 394 spinlock_t lock; 395 396 u64 total_bytes; /* total bytes in the space, 397 this doesn't take mirrors into account */ 398 u64 bytes_used; /* total bytes used, 399 this doesn't take mirrors into account */ 400 u64 bytes_pinned; /* total bytes pinned, will be freed when the 401 transaction finishes */ 402 u64 bytes_reserved; /* total bytes the allocator has reserved for 403 current allocations */ 404 u64 bytes_may_use; /* number of bytes that may be used for 405 delalloc/allocations */ 406 u64 bytes_readonly; /* total bytes that are read only */ 407 408 u64 max_extent_size; /* This will hold the maximum extent size of 409 the space info if we had an ENOSPC in the 410 allocator. */ 411 412 unsigned int full:1; /* indicates that we cannot allocate any more 413 chunks for this space */ 414 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 415 416 unsigned int flush:1; /* set if we are trying to make space */ 417 418 unsigned int force_alloc; /* set if we need to force a chunk 419 alloc for this space */ 420 421 u64 disk_used; /* total bytes used on disk */ 422 u64 disk_total; /* total bytes on disk, takes mirrors into 423 account */ 424 425 u64 flags; 426 427 /* 428 * bytes_pinned is kept in line with what is actually pinned, as in 429 * we've called update_block_group and dropped the bytes_used counter 430 * and increased the bytes_pinned counter. However this means that 431 * bytes_pinned does not reflect the bytes that will be pinned once the 432 * delayed refs are flushed, so this counter is inc'ed every time we 433 * call btrfs_free_extent so it is a realtime count of what will be 434 * freed once the transaction is committed. It will be zeroed every 435 * time the transaction commits. 436 */ 437 struct percpu_counter total_bytes_pinned; 438 439 struct list_head list; 440 /* Protected by the spinlock 'lock'. */ 441 struct list_head ro_bgs; 442 struct list_head priority_tickets; 443 struct list_head tickets; 444 /* 445 * tickets_id just indicates the next ticket will be handled, so note 446 * it's not stored per ticket. 447 */ 448 u64 tickets_id; 449 450 struct rw_semaphore groups_sem; 451 /* for block groups in our same type */ 452 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 453 wait_queue_head_t wait; 454 455 struct kobject kobj; 456 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 457 }; 458 459 #define BTRFS_BLOCK_RSV_GLOBAL 1 460 #define BTRFS_BLOCK_RSV_DELALLOC 2 461 #define BTRFS_BLOCK_RSV_TRANS 3 462 #define BTRFS_BLOCK_RSV_CHUNK 4 463 #define BTRFS_BLOCK_RSV_DELOPS 5 464 #define BTRFS_BLOCK_RSV_EMPTY 6 465 #define BTRFS_BLOCK_RSV_TEMP 7 466 467 struct btrfs_block_rsv { 468 u64 size; 469 u64 reserved; 470 struct btrfs_space_info *space_info; 471 spinlock_t lock; 472 unsigned short full; 473 unsigned short type; 474 unsigned short failfast; 475 }; 476 477 /* 478 * free clusters are used to claim free space in relatively large chunks, 479 * allowing us to do less seeky writes. They are used for all metadata 480 * allocations. In ssd_spread mode they are also used for data allocations. 481 */ 482 struct btrfs_free_cluster { 483 spinlock_t lock; 484 spinlock_t refill_lock; 485 struct rb_root root; 486 487 /* largest extent in this cluster */ 488 u64 max_size; 489 490 /* first extent starting offset */ 491 u64 window_start; 492 493 /* We did a full search and couldn't create a cluster */ 494 bool fragmented; 495 496 struct btrfs_block_group_cache *block_group; 497 /* 498 * when a cluster is allocated from a block group, we put the 499 * cluster onto a list in the block group so that it can 500 * be freed before the block group is freed. 501 */ 502 struct list_head block_group_list; 503 }; 504 505 enum btrfs_caching_type { 506 BTRFS_CACHE_NO = 0, 507 BTRFS_CACHE_STARTED = 1, 508 BTRFS_CACHE_FAST = 2, 509 BTRFS_CACHE_FINISHED = 3, 510 BTRFS_CACHE_ERROR = 4, 511 }; 512 513 enum btrfs_disk_cache_state { 514 BTRFS_DC_WRITTEN = 0, 515 BTRFS_DC_ERROR = 1, 516 BTRFS_DC_CLEAR = 2, 517 BTRFS_DC_SETUP = 3, 518 }; 519 520 struct btrfs_caching_control { 521 struct list_head list; 522 struct mutex mutex; 523 wait_queue_head_t wait; 524 struct btrfs_work work; 525 struct btrfs_block_group_cache *block_group; 526 u64 progress; 527 refcount_t count; 528 }; 529 530 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 531 #define CACHING_CTL_WAKE_UP SZ_2M 532 533 struct btrfs_io_ctl { 534 void *cur, *orig; 535 struct page *page; 536 struct page **pages; 537 struct btrfs_fs_info *fs_info; 538 struct inode *inode; 539 unsigned long size; 540 int index; 541 int num_pages; 542 int entries; 543 int bitmaps; 544 unsigned check_crcs:1; 545 }; 546 547 /* 548 * Tree to record all locked full stripes of a RAID5/6 block group 549 */ 550 struct btrfs_full_stripe_locks_tree { 551 struct rb_root root; 552 struct mutex lock; 553 }; 554 555 struct btrfs_block_group_cache { 556 struct btrfs_key key; 557 struct btrfs_block_group_item item; 558 struct btrfs_fs_info *fs_info; 559 struct inode *inode; 560 spinlock_t lock; 561 u64 pinned; 562 u64 reserved; 563 u64 delalloc_bytes; 564 u64 bytes_super; 565 u64 flags; 566 u64 cache_generation; 567 568 /* 569 * If the free space extent count exceeds this number, convert the block 570 * group to bitmaps. 571 */ 572 u32 bitmap_high_thresh; 573 574 /* 575 * If the free space extent count drops below this number, convert the 576 * block group back to extents. 577 */ 578 u32 bitmap_low_thresh; 579 580 /* 581 * It is just used for the delayed data space allocation because 582 * only the data space allocation and the relative metadata update 583 * can be done cross the transaction. 584 */ 585 struct rw_semaphore data_rwsem; 586 587 /* for raid56, this is a full stripe, without parity */ 588 unsigned long full_stripe_len; 589 590 unsigned int ro; 591 unsigned int iref:1; 592 unsigned int has_caching_ctl:1; 593 unsigned int removed:1; 594 595 int disk_cache_state; 596 597 /* cache tracking stuff */ 598 int cached; 599 struct btrfs_caching_control *caching_ctl; 600 u64 last_byte_to_unpin; 601 602 struct btrfs_space_info *space_info; 603 604 /* free space cache stuff */ 605 struct btrfs_free_space_ctl *free_space_ctl; 606 607 /* block group cache stuff */ 608 struct rb_node cache_node; 609 610 /* for block groups in the same raid type */ 611 struct list_head list; 612 613 /* usage count */ 614 atomic_t count; 615 616 /* List of struct btrfs_free_clusters for this block group. 617 * Today it will only have one thing on it, but that may change 618 */ 619 struct list_head cluster_list; 620 621 /* For delayed block group creation or deletion of empty block groups */ 622 struct list_head bg_list; 623 624 /* For read-only block groups */ 625 struct list_head ro_list; 626 627 atomic_t trimming; 628 629 /* For dirty block groups */ 630 struct list_head dirty_list; 631 struct list_head io_list; 632 633 struct btrfs_io_ctl io_ctl; 634 635 /* 636 * Incremented when doing extent allocations and holding a read lock 637 * on the space_info's groups_sem semaphore. 638 * Decremented when an ordered extent that represents an IO against this 639 * block group's range is created (after it's added to its inode's 640 * root's list of ordered extents) or immediately after the allocation 641 * if it's a metadata extent or fallocate extent (for these cases we 642 * don't create ordered extents). 643 */ 644 atomic_t reservations; 645 646 /* 647 * Incremented while holding the spinlock *lock* by a task checking if 648 * it can perform a nocow write (incremented if the value for the *ro* 649 * field is 0). Decremented by such tasks once they create an ordered 650 * extent or before that if some error happens before reaching that step. 651 * This is to prevent races between block group relocation and nocow 652 * writes through direct IO. 653 */ 654 atomic_t nocow_writers; 655 656 /* Lock for free space tree operations. */ 657 struct mutex free_space_lock; 658 659 /* 660 * Does the block group need to be added to the free space tree? 661 * Protected by free_space_lock. 662 */ 663 int needs_free_space; 664 665 /* Record locked full stripes for RAID5/6 block group */ 666 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 667 }; 668 669 /* delayed seq elem */ 670 struct seq_list { 671 struct list_head list; 672 u64 seq; 673 }; 674 675 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 676 677 #define SEQ_LAST ((u64)-1) 678 679 enum btrfs_orphan_cleanup_state { 680 ORPHAN_CLEANUP_STARTED = 1, 681 ORPHAN_CLEANUP_DONE = 2, 682 }; 683 684 /* used by the raid56 code to lock stripes for read/modify/write */ 685 struct btrfs_stripe_hash { 686 struct list_head hash_list; 687 spinlock_t lock; 688 }; 689 690 /* used by the raid56 code to lock stripes for read/modify/write */ 691 struct btrfs_stripe_hash_table { 692 struct list_head stripe_cache; 693 spinlock_t cache_lock; 694 int cache_size; 695 struct btrfs_stripe_hash table[]; 696 }; 697 698 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 699 700 void btrfs_init_async_reclaim_work(struct work_struct *work); 701 702 /* fs_info */ 703 struct reloc_control; 704 struct btrfs_device; 705 struct btrfs_fs_devices; 706 struct btrfs_balance_control; 707 struct btrfs_delayed_root; 708 709 #define BTRFS_FS_BARRIER 1 710 #define BTRFS_FS_CLOSING_START 2 711 #define BTRFS_FS_CLOSING_DONE 3 712 #define BTRFS_FS_LOG_RECOVERING 4 713 #define BTRFS_FS_OPEN 5 714 #define BTRFS_FS_QUOTA_ENABLED 6 715 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 716 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 717 #define BTRFS_FS_BTREE_ERR 11 718 #define BTRFS_FS_LOG1_ERR 12 719 #define BTRFS_FS_LOG2_ERR 13 720 #define BTRFS_FS_QUOTA_OVERRIDE 14 721 /* Used to record internally whether fs has been frozen */ 722 #define BTRFS_FS_FROZEN 15 723 724 /* 725 * Indicate that a whole-filesystem exclusive operation is running 726 * (device replace, resize, device add/delete, balance) 727 */ 728 #define BTRFS_FS_EXCL_OP 16 729 730 struct btrfs_fs_info { 731 u8 fsid[BTRFS_FSID_SIZE]; 732 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 733 unsigned long flags; 734 struct btrfs_root *extent_root; 735 struct btrfs_root *tree_root; 736 struct btrfs_root *chunk_root; 737 struct btrfs_root *dev_root; 738 struct btrfs_root *fs_root; 739 struct btrfs_root *csum_root; 740 struct btrfs_root *quota_root; 741 struct btrfs_root *uuid_root; 742 struct btrfs_root *free_space_root; 743 744 /* the log root tree is a directory of all the other log roots */ 745 struct btrfs_root *log_root_tree; 746 747 spinlock_t fs_roots_radix_lock; 748 struct radix_tree_root fs_roots_radix; 749 750 /* block group cache stuff */ 751 spinlock_t block_group_cache_lock; 752 u64 first_logical_byte; 753 struct rb_root block_group_cache_tree; 754 755 /* keep track of unallocated space */ 756 atomic64_t free_chunk_space; 757 758 struct extent_io_tree freed_extents[2]; 759 struct extent_io_tree *pinned_extents; 760 761 /* logical->physical extent mapping */ 762 struct btrfs_mapping_tree mapping_tree; 763 764 /* 765 * block reservation for extent, checksum, root tree and 766 * delayed dir index item 767 */ 768 struct btrfs_block_rsv global_block_rsv; 769 /* block reservation for metadata operations */ 770 struct btrfs_block_rsv trans_block_rsv; 771 /* block reservation for chunk tree */ 772 struct btrfs_block_rsv chunk_block_rsv; 773 /* block reservation for delayed operations */ 774 struct btrfs_block_rsv delayed_block_rsv; 775 776 struct btrfs_block_rsv empty_block_rsv; 777 778 u64 generation; 779 u64 last_trans_committed; 780 u64 avg_delayed_ref_runtime; 781 782 /* 783 * this is updated to the current trans every time a full commit 784 * is required instead of the faster short fsync log commits 785 */ 786 u64 last_trans_log_full_commit; 787 unsigned long mount_opt; 788 /* 789 * Track requests for actions that need to be done during transaction 790 * commit (like for some mount options). 791 */ 792 unsigned long pending_changes; 793 unsigned long compress_type:4; 794 unsigned int compress_level; 795 u32 commit_interval; 796 /* 797 * It is a suggestive number, the read side is safe even it gets a 798 * wrong number because we will write out the data into a regular 799 * extent. The write side(mount/remount) is under ->s_umount lock, 800 * so it is also safe. 801 */ 802 u64 max_inline; 803 804 struct btrfs_transaction *running_transaction; 805 wait_queue_head_t transaction_throttle; 806 wait_queue_head_t transaction_wait; 807 wait_queue_head_t transaction_blocked_wait; 808 wait_queue_head_t async_submit_wait; 809 810 /* 811 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 812 * when they are updated. 813 * 814 * Because we do not clear the flags for ever, so we needn't use 815 * the lock on the read side. 816 * 817 * We also needn't use the lock when we mount the fs, because 818 * there is no other task which will update the flag. 819 */ 820 spinlock_t super_lock; 821 struct btrfs_super_block *super_copy; 822 struct btrfs_super_block *super_for_commit; 823 struct super_block *sb; 824 struct inode *btree_inode; 825 struct mutex tree_log_mutex; 826 struct mutex transaction_kthread_mutex; 827 struct mutex cleaner_mutex; 828 struct mutex chunk_mutex; 829 struct mutex volume_mutex; 830 831 /* 832 * this is taken to make sure we don't set block groups ro after 833 * the free space cache has been allocated on them 834 */ 835 struct mutex ro_block_group_mutex; 836 837 /* this is used during read/modify/write to make sure 838 * no two ios are trying to mod the same stripe at the same 839 * time 840 */ 841 struct btrfs_stripe_hash_table *stripe_hash_table; 842 843 /* 844 * this protects the ordered operations list only while we are 845 * processing all of the entries on it. This way we make 846 * sure the commit code doesn't find the list temporarily empty 847 * because another function happens to be doing non-waiting preflush 848 * before jumping into the main commit. 849 */ 850 struct mutex ordered_operations_mutex; 851 852 struct rw_semaphore commit_root_sem; 853 854 struct rw_semaphore cleanup_work_sem; 855 856 struct rw_semaphore subvol_sem; 857 struct srcu_struct subvol_srcu; 858 859 spinlock_t trans_lock; 860 /* 861 * the reloc mutex goes with the trans lock, it is taken 862 * during commit to protect us from the relocation code 863 */ 864 struct mutex reloc_mutex; 865 866 struct list_head trans_list; 867 struct list_head dead_roots; 868 struct list_head caching_block_groups; 869 870 spinlock_t delayed_iput_lock; 871 struct list_head delayed_iputs; 872 struct mutex cleaner_delayed_iput_mutex; 873 874 /* this protects tree_mod_seq_list */ 875 spinlock_t tree_mod_seq_lock; 876 atomic64_t tree_mod_seq; 877 struct list_head tree_mod_seq_list; 878 879 /* this protects tree_mod_log */ 880 rwlock_t tree_mod_log_lock; 881 struct rb_root tree_mod_log; 882 883 atomic_t async_delalloc_pages; 884 885 /* 886 * this is used to protect the following list -- ordered_roots. 887 */ 888 spinlock_t ordered_root_lock; 889 890 /* 891 * all fs/file tree roots in which there are data=ordered extents 892 * pending writeback are added into this list. 893 * 894 * these can span multiple transactions and basically include 895 * every dirty data page that isn't from nodatacow 896 */ 897 struct list_head ordered_roots; 898 899 struct mutex delalloc_root_mutex; 900 spinlock_t delalloc_root_lock; 901 /* all fs/file tree roots that have delalloc inodes. */ 902 struct list_head delalloc_roots; 903 904 /* 905 * there is a pool of worker threads for checksumming during writes 906 * and a pool for checksumming after reads. This is because readers 907 * can run with FS locks held, and the writers may be waiting for 908 * those locks. We don't want ordering in the pending list to cause 909 * deadlocks, and so the two are serviced separately. 910 * 911 * A third pool does submit_bio to avoid deadlocking with the other 912 * two 913 */ 914 struct btrfs_workqueue *workers; 915 struct btrfs_workqueue *delalloc_workers; 916 struct btrfs_workqueue *flush_workers; 917 struct btrfs_workqueue *endio_workers; 918 struct btrfs_workqueue *endio_meta_workers; 919 struct btrfs_workqueue *endio_raid56_workers; 920 struct btrfs_workqueue *endio_repair_workers; 921 struct btrfs_workqueue *rmw_workers; 922 struct btrfs_workqueue *endio_meta_write_workers; 923 struct btrfs_workqueue *endio_write_workers; 924 struct btrfs_workqueue *endio_freespace_worker; 925 struct btrfs_workqueue *submit_workers; 926 struct btrfs_workqueue *caching_workers; 927 struct btrfs_workqueue *readahead_workers; 928 929 /* 930 * fixup workers take dirty pages that didn't properly go through 931 * the cow mechanism and make them safe to write. It happens 932 * for the sys_munmap function call path 933 */ 934 struct btrfs_workqueue *fixup_workers; 935 struct btrfs_workqueue *delayed_workers; 936 937 /* the extent workers do delayed refs on the extent allocation tree */ 938 struct btrfs_workqueue *extent_workers; 939 struct task_struct *transaction_kthread; 940 struct task_struct *cleaner_kthread; 941 u32 thread_pool_size; 942 943 struct kobject *space_info_kobj; 944 struct list_head pending_raid_kobjs; 945 spinlock_t pending_raid_kobjs_lock; /* uncontended */ 946 947 u64 total_pinned; 948 949 /* used to keep from writing metadata until there is a nice batch */ 950 struct percpu_counter dirty_metadata_bytes; 951 struct percpu_counter delalloc_bytes; 952 s32 dirty_metadata_batch; 953 s32 delalloc_batch; 954 955 struct list_head dirty_cowonly_roots; 956 957 struct btrfs_fs_devices *fs_devices; 958 959 /* 960 * The space_info list is effectively read only after initial 961 * setup. It is populated at mount time and cleaned up after 962 * all block groups are removed. RCU is used to protect it. 963 */ 964 struct list_head space_info; 965 966 struct btrfs_space_info *data_sinfo; 967 968 struct reloc_control *reloc_ctl; 969 970 /* data_alloc_cluster is only used in ssd_spread mode */ 971 struct btrfs_free_cluster data_alloc_cluster; 972 973 /* all metadata allocations go through this cluster */ 974 struct btrfs_free_cluster meta_alloc_cluster; 975 976 /* auto defrag inodes go here */ 977 spinlock_t defrag_inodes_lock; 978 struct rb_root defrag_inodes; 979 atomic_t defrag_running; 980 981 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 982 seqlock_t profiles_lock; 983 /* 984 * these three are in extended format (availability of single 985 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 986 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 987 */ 988 u64 avail_data_alloc_bits; 989 u64 avail_metadata_alloc_bits; 990 u64 avail_system_alloc_bits; 991 992 /* restriper state */ 993 spinlock_t balance_lock; 994 struct mutex balance_mutex; 995 atomic_t balance_running; 996 atomic_t balance_pause_req; 997 atomic_t balance_cancel_req; 998 struct btrfs_balance_control *balance_ctl; 999 wait_queue_head_t balance_wait_q; 1000 1001 u32 data_chunk_allocations; 1002 u32 metadata_ratio; 1003 1004 void *bdev_holder; 1005 1006 /* private scrub information */ 1007 struct mutex scrub_lock; 1008 atomic_t scrubs_running; 1009 atomic_t scrub_pause_req; 1010 atomic_t scrubs_paused; 1011 atomic_t scrub_cancel_req; 1012 wait_queue_head_t scrub_pause_wait; 1013 int scrub_workers_refcnt; 1014 struct btrfs_workqueue *scrub_workers; 1015 struct btrfs_workqueue *scrub_wr_completion_workers; 1016 struct btrfs_workqueue *scrub_nocow_workers; 1017 struct btrfs_workqueue *scrub_parity_workers; 1018 1019 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1020 u32 check_integrity_print_mask; 1021 #endif 1022 /* is qgroup tracking in a consistent state? */ 1023 u64 qgroup_flags; 1024 1025 /* holds configuration and tracking. Protected by qgroup_lock */ 1026 struct rb_root qgroup_tree; 1027 struct rb_root qgroup_op_tree; 1028 spinlock_t qgroup_lock; 1029 spinlock_t qgroup_op_lock; 1030 atomic_t qgroup_op_seq; 1031 1032 /* 1033 * used to avoid frequently calling ulist_alloc()/ulist_free() 1034 * when doing qgroup accounting, it must be protected by qgroup_lock. 1035 */ 1036 struct ulist *qgroup_ulist; 1037 1038 /* protect user change for quota operations */ 1039 struct mutex qgroup_ioctl_lock; 1040 1041 /* list of dirty qgroups to be written at next commit */ 1042 struct list_head dirty_qgroups; 1043 1044 /* used by qgroup for an efficient tree traversal */ 1045 u64 qgroup_seq; 1046 1047 /* qgroup rescan items */ 1048 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1049 struct btrfs_key qgroup_rescan_progress; 1050 struct btrfs_workqueue *qgroup_rescan_workers; 1051 struct completion qgroup_rescan_completion; 1052 struct btrfs_work qgroup_rescan_work; 1053 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1054 1055 /* filesystem state */ 1056 unsigned long fs_state; 1057 1058 struct btrfs_delayed_root *delayed_root; 1059 1060 /* readahead tree */ 1061 spinlock_t reada_lock; 1062 struct radix_tree_root reada_tree; 1063 1064 /* readahead works cnt */ 1065 atomic_t reada_works_cnt; 1066 1067 /* Extent buffer radix tree */ 1068 spinlock_t buffer_lock; 1069 struct radix_tree_root buffer_radix; 1070 1071 /* next backup root to be overwritten */ 1072 int backup_root_index; 1073 1074 /* device replace state */ 1075 struct btrfs_dev_replace dev_replace; 1076 1077 struct percpu_counter bio_counter; 1078 wait_queue_head_t replace_wait; 1079 1080 struct semaphore uuid_tree_rescan_sem; 1081 1082 /* Used to reclaim the metadata space in the background. */ 1083 struct work_struct async_reclaim_work; 1084 1085 spinlock_t unused_bgs_lock; 1086 struct list_head unused_bgs; 1087 struct mutex unused_bg_unpin_mutex; 1088 struct mutex delete_unused_bgs_mutex; 1089 1090 /* For btrfs to record security options */ 1091 struct security_mnt_opts security_opts; 1092 1093 /* 1094 * Chunks that can't be freed yet (under a trim/discard operation) 1095 * and will be latter freed. Protected by fs_info->chunk_mutex. 1096 */ 1097 struct list_head pinned_chunks; 1098 1099 /* Cached block sizes */ 1100 u32 nodesize; 1101 u32 sectorsize; 1102 u32 stripesize; 1103 1104 #ifdef CONFIG_BTRFS_FS_REF_VERIFY 1105 spinlock_t ref_verify_lock; 1106 struct rb_root block_tree; 1107 #endif 1108 }; 1109 1110 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1111 { 1112 return sb->s_fs_info; 1113 } 1114 1115 struct btrfs_subvolume_writers { 1116 struct percpu_counter counter; 1117 wait_queue_head_t wait; 1118 }; 1119 1120 /* 1121 * The state of btrfs root 1122 */ 1123 /* 1124 * btrfs_record_root_in_trans is a multi-step process, 1125 * and it can race with the balancing code. But the 1126 * race is very small, and only the first time the root 1127 * is added to each transaction. So IN_TRANS_SETUP 1128 * is used to tell us when more checks are required 1129 */ 1130 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1131 #define BTRFS_ROOT_REF_COWS 1 1132 #define BTRFS_ROOT_TRACK_DIRTY 2 1133 #define BTRFS_ROOT_IN_RADIX 3 1134 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1135 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1136 #define BTRFS_ROOT_FORCE_COW 6 1137 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1138 #define BTRFS_ROOT_DIRTY 8 1139 1140 /* 1141 * in ram representation of the tree. extent_root is used for all allocations 1142 * and for the extent tree extent_root root. 1143 */ 1144 struct btrfs_root { 1145 struct extent_buffer *node; 1146 1147 struct extent_buffer *commit_root; 1148 struct btrfs_root *log_root; 1149 struct btrfs_root *reloc_root; 1150 1151 unsigned long state; 1152 struct btrfs_root_item root_item; 1153 struct btrfs_key root_key; 1154 struct btrfs_fs_info *fs_info; 1155 struct extent_io_tree dirty_log_pages; 1156 1157 struct mutex objectid_mutex; 1158 1159 spinlock_t accounting_lock; 1160 struct btrfs_block_rsv *block_rsv; 1161 1162 /* free ino cache stuff */ 1163 struct btrfs_free_space_ctl *free_ino_ctl; 1164 enum btrfs_caching_type ino_cache_state; 1165 spinlock_t ino_cache_lock; 1166 wait_queue_head_t ino_cache_wait; 1167 struct btrfs_free_space_ctl *free_ino_pinned; 1168 u64 ino_cache_progress; 1169 struct inode *ino_cache_inode; 1170 1171 struct mutex log_mutex; 1172 wait_queue_head_t log_writer_wait; 1173 wait_queue_head_t log_commit_wait[2]; 1174 struct list_head log_ctxs[2]; 1175 atomic_t log_writers; 1176 atomic_t log_commit[2]; 1177 atomic_t log_batch; 1178 int log_transid; 1179 /* No matter the commit succeeds or not*/ 1180 int log_transid_committed; 1181 /* Just be updated when the commit succeeds. */ 1182 int last_log_commit; 1183 pid_t log_start_pid; 1184 1185 u64 objectid; 1186 u64 last_trans; 1187 1188 u32 type; 1189 1190 u64 highest_objectid; 1191 1192 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1193 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1194 u64 alloc_bytenr; 1195 #endif 1196 1197 u64 defrag_trans_start; 1198 struct btrfs_key defrag_progress; 1199 struct btrfs_key defrag_max; 1200 char *name; 1201 1202 /* the dirty list is only used by non-reference counted roots */ 1203 struct list_head dirty_list; 1204 1205 struct list_head root_list; 1206 1207 spinlock_t log_extents_lock[2]; 1208 struct list_head logged_list[2]; 1209 1210 spinlock_t orphan_lock; 1211 atomic_t orphan_inodes; 1212 struct btrfs_block_rsv *orphan_block_rsv; 1213 int orphan_cleanup_state; 1214 1215 spinlock_t inode_lock; 1216 /* red-black tree that keeps track of in-memory inodes */ 1217 struct rb_root inode_tree; 1218 1219 /* 1220 * radix tree that keeps track of delayed nodes of every inode, 1221 * protected by inode_lock 1222 */ 1223 struct radix_tree_root delayed_nodes_tree; 1224 /* 1225 * right now this just gets used so that a root has its own devid 1226 * for stat. It may be used for more later 1227 */ 1228 dev_t anon_dev; 1229 1230 spinlock_t root_item_lock; 1231 refcount_t refs; 1232 1233 struct mutex delalloc_mutex; 1234 spinlock_t delalloc_lock; 1235 /* 1236 * all of the inodes that have delalloc bytes. It is possible for 1237 * this list to be empty even when there is still dirty data=ordered 1238 * extents waiting to finish IO. 1239 */ 1240 struct list_head delalloc_inodes; 1241 struct list_head delalloc_root; 1242 u64 nr_delalloc_inodes; 1243 1244 struct mutex ordered_extent_mutex; 1245 /* 1246 * this is used by the balancing code to wait for all the pending 1247 * ordered extents 1248 */ 1249 spinlock_t ordered_extent_lock; 1250 1251 /* 1252 * all of the data=ordered extents pending writeback 1253 * these can span multiple transactions and basically include 1254 * every dirty data page that isn't from nodatacow 1255 */ 1256 struct list_head ordered_extents; 1257 struct list_head ordered_root; 1258 u64 nr_ordered_extents; 1259 1260 /* 1261 * Number of currently running SEND ioctls to prevent 1262 * manipulation with the read-only status via SUBVOL_SETFLAGS 1263 */ 1264 int send_in_progress; 1265 struct btrfs_subvolume_writers *subv_writers; 1266 atomic_t will_be_snapshotted; 1267 1268 /* For qgroup metadata reserved space */ 1269 spinlock_t qgroup_meta_rsv_lock; 1270 u64 qgroup_meta_rsv_pertrans; 1271 u64 qgroup_meta_rsv_prealloc; 1272 }; 1273 1274 struct btrfs_file_private { 1275 void *filldir_buf; 1276 }; 1277 1278 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1279 { 1280 return btrfs_sb(inode->i_sb)->sectorsize; 1281 } 1282 1283 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1284 { 1285 1286 return info->nodesize - sizeof(struct btrfs_header); 1287 } 1288 1289 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1290 1291 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1292 { 1293 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1294 } 1295 1296 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1297 { 1298 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1299 } 1300 1301 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1302 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1303 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1304 { 1305 return BTRFS_MAX_ITEM_SIZE(info) - 1306 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1307 } 1308 1309 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1310 { 1311 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1312 } 1313 1314 /* 1315 * Flags for mount options. 1316 * 1317 * Note: don't forget to add new options to btrfs_show_options() 1318 */ 1319 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1320 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1321 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1322 #define BTRFS_MOUNT_SSD (1 << 3) 1323 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1324 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1325 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1326 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1327 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1328 #define BTRFS_MOUNT_NOSSD (1 << 9) 1329 #define BTRFS_MOUNT_DISCARD (1 << 10) 1330 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1331 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1332 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1333 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1334 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1335 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1336 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1337 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1338 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1339 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1340 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1341 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1342 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1343 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1344 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1345 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1346 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1347 #define BTRFS_MOUNT_REF_VERIFY (1 << 28) 1348 1349 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1350 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1351 1352 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1353 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1354 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1355 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1356 BTRFS_MOUNT_##opt) 1357 1358 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1359 { \ 1360 if (!btrfs_test_opt(fs_info, opt)) \ 1361 btrfs_info(fs_info, fmt, ##args); \ 1362 btrfs_set_opt(fs_info->mount_opt, opt); \ 1363 } 1364 1365 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1366 { \ 1367 if (btrfs_test_opt(fs_info, opt)) \ 1368 btrfs_info(fs_info, fmt, ##args); \ 1369 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1370 } 1371 1372 #ifdef CONFIG_BTRFS_DEBUG 1373 static inline int 1374 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1375 { 1376 struct btrfs_fs_info *fs_info = block_group->fs_info; 1377 1378 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1379 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1380 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1381 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1382 } 1383 #endif 1384 1385 /* 1386 * Requests for changes that need to be done during transaction commit. 1387 * 1388 * Internal mount options that are used for special handling of the real 1389 * mount options (eg. cannot be set during remount and have to be set during 1390 * transaction commit) 1391 */ 1392 1393 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1394 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1395 #define BTRFS_PENDING_COMMIT (2) 1396 1397 #define btrfs_test_pending(info, opt) \ 1398 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1399 #define btrfs_set_pending(info, opt) \ 1400 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1401 #define btrfs_clear_pending(info, opt) \ 1402 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1403 1404 /* 1405 * Helpers for setting pending mount option changes. 1406 * 1407 * Expects corresponding macros 1408 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1409 */ 1410 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1411 do { \ 1412 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1413 btrfs_info((info), fmt, ##args); \ 1414 btrfs_set_pending((info), SET_##opt); \ 1415 btrfs_clear_pending((info), CLEAR_##opt); \ 1416 } \ 1417 } while(0) 1418 1419 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1420 do { \ 1421 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1422 btrfs_info((info), fmt, ##args); \ 1423 btrfs_set_pending((info), CLEAR_##opt); \ 1424 btrfs_clear_pending((info), SET_##opt); \ 1425 } \ 1426 } while(0) 1427 1428 /* 1429 * Inode flags 1430 */ 1431 #define BTRFS_INODE_NODATASUM (1 << 0) 1432 #define BTRFS_INODE_NODATACOW (1 << 1) 1433 #define BTRFS_INODE_READONLY (1 << 2) 1434 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1435 #define BTRFS_INODE_PREALLOC (1 << 4) 1436 #define BTRFS_INODE_SYNC (1 << 5) 1437 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1438 #define BTRFS_INODE_APPEND (1 << 7) 1439 #define BTRFS_INODE_NODUMP (1 << 8) 1440 #define BTRFS_INODE_NOATIME (1 << 9) 1441 #define BTRFS_INODE_DIRSYNC (1 << 10) 1442 #define BTRFS_INODE_COMPRESS (1 << 11) 1443 1444 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1445 1446 struct btrfs_map_token { 1447 const struct extent_buffer *eb; 1448 char *kaddr; 1449 unsigned long offset; 1450 }; 1451 1452 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1453 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1454 1455 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1456 { 1457 token->kaddr = NULL; 1458 } 1459 1460 /* some macros to generate set/get functions for the struct fields. This 1461 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1462 * one for u8: 1463 */ 1464 #define le8_to_cpu(v) (v) 1465 #define cpu_to_le8(v) (v) 1466 #define __le8 u8 1467 1468 #define read_eb_member(eb, ptr, type, member, result) (\ 1469 read_extent_buffer(eb, (char *)(result), \ 1470 ((unsigned long)(ptr)) + \ 1471 offsetof(type, member), \ 1472 sizeof(((type *)0)->member))) 1473 1474 #define write_eb_member(eb, ptr, type, member, result) (\ 1475 write_extent_buffer(eb, (char *)(result), \ 1476 ((unsigned long)(ptr)) + \ 1477 offsetof(type, member), \ 1478 sizeof(((type *)0)->member))) 1479 1480 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1481 u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ 1482 const void *ptr, unsigned long off, \ 1483 struct btrfs_map_token *token); \ 1484 void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ 1485 unsigned long off, u##bits val, \ 1486 struct btrfs_map_token *token); \ 1487 static inline u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ 1488 const void *ptr, \ 1489 unsigned long off) \ 1490 { \ 1491 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1492 } \ 1493 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr,\ 1494 unsigned long off, u##bits val) \ 1495 { \ 1496 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1497 } 1498 1499 DECLARE_BTRFS_SETGET_BITS(8) 1500 DECLARE_BTRFS_SETGET_BITS(16) 1501 DECLARE_BTRFS_SETGET_BITS(32) 1502 DECLARE_BTRFS_SETGET_BITS(64) 1503 1504 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1505 static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ 1506 const type *s) \ 1507 { \ 1508 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1509 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1510 } \ 1511 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1512 u##bits val) \ 1513 { \ 1514 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1515 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1516 } \ 1517 static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ 1518 const type *s, \ 1519 struct btrfs_map_token *token) \ 1520 { \ 1521 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1522 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1523 } \ 1524 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1525 type *s, u##bits val, \ 1526 struct btrfs_map_token *token) \ 1527 { \ 1528 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1529 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1530 } 1531 1532 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1533 static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ 1534 { \ 1535 const type *p = page_address(eb->pages[0]); \ 1536 u##bits res = le##bits##_to_cpu(p->member); \ 1537 return res; \ 1538 } \ 1539 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1540 u##bits val) \ 1541 { \ 1542 type *p = page_address(eb->pages[0]); \ 1543 p->member = cpu_to_le##bits(val); \ 1544 } 1545 1546 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1547 static inline u##bits btrfs_##name(const type *s) \ 1548 { \ 1549 return le##bits##_to_cpu(s->member); \ 1550 } \ 1551 static inline void btrfs_set_##name(type *s, u##bits val) \ 1552 { \ 1553 s->member = cpu_to_le##bits(val); \ 1554 } 1555 1556 1557 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1558 struct btrfs_dev_item *s) 1559 { 1560 BUILD_BUG_ON(sizeof(u64) != 1561 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1562 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1563 total_bytes)); 1564 } 1565 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1566 struct btrfs_dev_item *s, 1567 u64 val) 1568 { 1569 BUILD_BUG_ON(sizeof(u64) != 1570 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1571 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1572 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1573 } 1574 1575 1576 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1577 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1578 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1579 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1580 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1581 start_offset, 64); 1582 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1583 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1584 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1585 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1586 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1587 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1588 1589 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1590 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1591 total_bytes, 64); 1592 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1593 bytes_used, 64); 1594 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1595 io_align, 32); 1596 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1597 io_width, 32); 1598 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1599 sector_size, 32); 1600 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1601 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1602 dev_group, 32); 1603 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1604 seek_speed, 8); 1605 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1606 bandwidth, 8); 1607 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1608 generation, 64); 1609 1610 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1611 { 1612 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1613 } 1614 1615 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1616 { 1617 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1618 } 1619 1620 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1621 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1622 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1623 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1624 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1625 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1626 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1627 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1628 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1629 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1630 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1631 1632 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1633 { 1634 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1635 } 1636 1637 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1639 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1640 stripe_len, 64); 1641 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1642 io_align, 32); 1643 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1644 io_width, 32); 1645 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1646 sector_size, 32); 1647 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1648 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1649 num_stripes, 16); 1650 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1651 sub_stripes, 16); 1652 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1653 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1654 1655 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1656 int nr) 1657 { 1658 unsigned long offset = (unsigned long)c; 1659 offset += offsetof(struct btrfs_chunk, stripe); 1660 offset += nr * sizeof(struct btrfs_stripe); 1661 return (struct btrfs_stripe *)offset; 1662 } 1663 1664 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1665 { 1666 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1667 } 1668 1669 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1670 struct btrfs_chunk *c, int nr) 1671 { 1672 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1673 } 1674 1675 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1676 struct btrfs_chunk *c, int nr) 1677 { 1678 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1679 } 1680 1681 /* struct btrfs_block_group_item */ 1682 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1683 used, 64); 1684 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1685 used, 64); 1686 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1687 struct btrfs_block_group_item, chunk_objectid, 64); 1688 1689 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1690 struct btrfs_block_group_item, chunk_objectid, 64); 1691 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1692 struct btrfs_block_group_item, flags, 64); 1693 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1694 struct btrfs_block_group_item, flags, 64); 1695 1696 /* struct btrfs_free_space_info */ 1697 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1698 extent_count, 32); 1699 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1700 1701 /* struct btrfs_inode_ref */ 1702 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1703 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1704 1705 /* struct btrfs_inode_extref */ 1706 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1707 parent_objectid, 64); 1708 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1709 name_len, 16); 1710 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1711 1712 /* struct btrfs_inode_item */ 1713 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1714 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1715 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1716 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1717 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1718 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1719 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1720 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1721 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1722 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1723 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1724 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1726 generation, 64); 1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1728 sequence, 64); 1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1730 transid, 64); 1731 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1732 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1733 nbytes, 64); 1734 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1735 block_group, 64); 1736 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1737 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1738 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1739 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1740 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1741 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1742 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1743 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1744 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1745 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1746 1747 /* struct btrfs_dev_extent */ 1748 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1749 chunk_tree, 64); 1750 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1751 chunk_objectid, 64); 1752 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1753 chunk_offset, 64); 1754 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1755 1756 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1757 { 1758 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1759 return (unsigned long)dev + ptr; 1760 } 1761 1762 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1763 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1764 generation, 64); 1765 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1766 1767 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1768 1769 1770 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1771 1772 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1773 struct btrfs_tree_block_info *item, 1774 struct btrfs_disk_key *key) 1775 { 1776 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1777 } 1778 1779 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1780 struct btrfs_tree_block_info *item, 1781 struct btrfs_disk_key *key) 1782 { 1783 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1784 } 1785 1786 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1787 root, 64); 1788 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1789 objectid, 64); 1790 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1791 offset, 64); 1792 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1793 count, 32); 1794 1795 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1796 count, 32); 1797 1798 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1799 type, 8); 1800 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1801 offset, 64); 1802 1803 static inline u32 btrfs_extent_inline_ref_size(int type) 1804 { 1805 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1806 type == BTRFS_SHARED_BLOCK_REF_KEY) 1807 return sizeof(struct btrfs_extent_inline_ref); 1808 if (type == BTRFS_SHARED_DATA_REF_KEY) 1809 return sizeof(struct btrfs_shared_data_ref) + 1810 sizeof(struct btrfs_extent_inline_ref); 1811 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1812 return sizeof(struct btrfs_extent_data_ref) + 1813 offsetof(struct btrfs_extent_inline_ref, offset); 1814 return 0; 1815 } 1816 1817 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1818 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1819 generation, 64); 1820 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1821 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1822 1823 /* struct btrfs_node */ 1824 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1825 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1826 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1827 blockptr, 64); 1828 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1829 generation, 64); 1830 1831 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1832 { 1833 unsigned long ptr; 1834 ptr = offsetof(struct btrfs_node, ptrs) + 1835 sizeof(struct btrfs_key_ptr) * nr; 1836 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1837 } 1838 1839 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1840 int nr, u64 val) 1841 { 1842 unsigned long ptr; 1843 ptr = offsetof(struct btrfs_node, ptrs) + 1844 sizeof(struct btrfs_key_ptr) * nr; 1845 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1846 } 1847 1848 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1849 { 1850 unsigned long ptr; 1851 ptr = offsetof(struct btrfs_node, ptrs) + 1852 sizeof(struct btrfs_key_ptr) * nr; 1853 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1854 } 1855 1856 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1857 int nr, u64 val) 1858 { 1859 unsigned long ptr; 1860 ptr = offsetof(struct btrfs_node, ptrs) + 1861 sizeof(struct btrfs_key_ptr) * nr; 1862 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1863 } 1864 1865 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1866 { 1867 return offsetof(struct btrfs_node, ptrs) + 1868 sizeof(struct btrfs_key_ptr) * nr; 1869 } 1870 1871 void btrfs_node_key(const struct extent_buffer *eb, 1872 struct btrfs_disk_key *disk_key, int nr); 1873 1874 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1875 struct btrfs_disk_key *disk_key, int nr) 1876 { 1877 unsigned long ptr; 1878 ptr = btrfs_node_key_ptr_offset(nr); 1879 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1880 struct btrfs_key_ptr, key, disk_key); 1881 } 1882 1883 /* struct btrfs_item */ 1884 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1885 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1886 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1887 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1888 1889 static inline unsigned long btrfs_item_nr_offset(int nr) 1890 { 1891 return offsetof(struct btrfs_leaf, items) + 1892 sizeof(struct btrfs_item) * nr; 1893 } 1894 1895 static inline struct btrfs_item *btrfs_item_nr(int nr) 1896 { 1897 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1898 } 1899 1900 static inline u32 btrfs_item_end(const struct extent_buffer *eb, 1901 struct btrfs_item *item) 1902 { 1903 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1904 } 1905 1906 static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) 1907 { 1908 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1909 } 1910 1911 static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) 1912 { 1913 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1914 } 1915 1916 static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) 1917 { 1918 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1919 } 1920 1921 static inline void btrfs_item_key(const struct extent_buffer *eb, 1922 struct btrfs_disk_key *disk_key, int nr) 1923 { 1924 struct btrfs_item *item = btrfs_item_nr(nr); 1925 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1926 } 1927 1928 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1929 struct btrfs_disk_key *disk_key, int nr) 1930 { 1931 struct btrfs_item *item = btrfs_item_nr(nr); 1932 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1933 } 1934 1935 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1936 1937 /* 1938 * struct btrfs_root_ref 1939 */ 1940 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1941 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1942 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1943 1944 /* struct btrfs_dir_item */ 1945 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1946 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1947 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1948 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1949 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1950 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1951 data_len, 16); 1952 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1953 name_len, 16); 1954 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1955 transid, 64); 1956 1957 static inline void btrfs_dir_item_key(const struct extent_buffer *eb, 1958 const struct btrfs_dir_item *item, 1959 struct btrfs_disk_key *key) 1960 { 1961 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1962 } 1963 1964 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1965 struct btrfs_dir_item *item, 1966 const struct btrfs_disk_key *key) 1967 { 1968 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1969 } 1970 1971 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1972 num_entries, 64); 1973 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1974 num_bitmaps, 64); 1975 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1976 generation, 64); 1977 1978 static inline void btrfs_free_space_key(const struct extent_buffer *eb, 1979 const struct btrfs_free_space_header *h, 1980 struct btrfs_disk_key *key) 1981 { 1982 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1983 } 1984 1985 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1986 struct btrfs_free_space_header *h, 1987 const struct btrfs_disk_key *key) 1988 { 1989 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1990 } 1991 1992 /* struct btrfs_disk_key */ 1993 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1994 objectid, 64); 1995 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1996 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1997 1998 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1999 const struct btrfs_disk_key *disk) 2000 { 2001 cpu->offset = le64_to_cpu(disk->offset); 2002 cpu->type = disk->type; 2003 cpu->objectid = le64_to_cpu(disk->objectid); 2004 } 2005 2006 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 2007 const struct btrfs_key *cpu) 2008 { 2009 disk->offset = cpu_to_le64(cpu->offset); 2010 disk->type = cpu->type; 2011 disk->objectid = cpu_to_le64(cpu->objectid); 2012 } 2013 2014 static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, 2015 struct btrfs_key *key, int nr) 2016 { 2017 struct btrfs_disk_key disk_key; 2018 btrfs_node_key(eb, &disk_key, nr); 2019 btrfs_disk_key_to_cpu(key, &disk_key); 2020 } 2021 2022 static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, 2023 struct btrfs_key *key, int nr) 2024 { 2025 struct btrfs_disk_key disk_key; 2026 btrfs_item_key(eb, &disk_key, nr); 2027 btrfs_disk_key_to_cpu(key, &disk_key); 2028 } 2029 2030 static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, 2031 const struct btrfs_dir_item *item, 2032 struct btrfs_key *key) 2033 { 2034 struct btrfs_disk_key disk_key; 2035 btrfs_dir_item_key(eb, item, &disk_key); 2036 btrfs_disk_key_to_cpu(key, &disk_key); 2037 } 2038 2039 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2040 { 2041 return key->type; 2042 } 2043 2044 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2045 { 2046 key->type = val; 2047 } 2048 2049 /* struct btrfs_header */ 2050 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2051 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2052 generation, 64); 2053 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2054 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2055 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2056 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2057 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2058 generation, 64); 2059 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2060 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2061 nritems, 32); 2062 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2063 2064 static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) 2065 { 2066 return (btrfs_header_flags(eb) & flag) == flag; 2067 } 2068 2069 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2070 { 2071 u64 flags = btrfs_header_flags(eb); 2072 btrfs_set_header_flags(eb, flags | flag); 2073 return (flags & flag) == flag; 2074 } 2075 2076 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2077 { 2078 u64 flags = btrfs_header_flags(eb); 2079 btrfs_set_header_flags(eb, flags & ~flag); 2080 return (flags & flag) == flag; 2081 } 2082 2083 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) 2084 { 2085 u64 flags = btrfs_header_flags(eb); 2086 return flags >> BTRFS_BACKREF_REV_SHIFT; 2087 } 2088 2089 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2090 int rev) 2091 { 2092 u64 flags = btrfs_header_flags(eb); 2093 flags &= ~BTRFS_BACKREF_REV_MASK; 2094 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2095 btrfs_set_header_flags(eb, flags); 2096 } 2097 2098 static inline unsigned long btrfs_header_fsid(void) 2099 { 2100 return offsetof(struct btrfs_header, fsid); 2101 } 2102 2103 static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) 2104 { 2105 return offsetof(struct btrfs_header, chunk_tree_uuid); 2106 } 2107 2108 static inline int btrfs_is_leaf(const struct extent_buffer *eb) 2109 { 2110 return btrfs_header_level(eb) == 0; 2111 } 2112 2113 /* struct btrfs_root_item */ 2114 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2115 generation, 64); 2116 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2117 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2118 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2119 2120 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2121 generation, 64); 2122 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2123 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2124 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2125 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2126 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2127 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2128 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2129 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2130 last_snapshot, 64); 2131 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2132 generation_v2, 64); 2133 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2134 ctransid, 64); 2135 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2136 otransid, 64); 2137 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2138 stransid, 64); 2139 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2140 rtransid, 64); 2141 2142 static inline bool btrfs_root_readonly(const struct btrfs_root *root) 2143 { 2144 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2145 } 2146 2147 static inline bool btrfs_root_dead(const struct btrfs_root *root) 2148 { 2149 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2150 } 2151 2152 /* struct btrfs_root_backup */ 2153 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2154 tree_root, 64); 2155 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2156 tree_root_gen, 64); 2157 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2158 tree_root_level, 8); 2159 2160 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2161 chunk_root, 64); 2162 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2163 chunk_root_gen, 64); 2164 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2165 chunk_root_level, 8); 2166 2167 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2168 extent_root, 64); 2169 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2170 extent_root_gen, 64); 2171 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2172 extent_root_level, 8); 2173 2174 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2175 fs_root, 64); 2176 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2177 fs_root_gen, 64); 2178 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2179 fs_root_level, 8); 2180 2181 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2182 dev_root, 64); 2183 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2184 dev_root_gen, 64); 2185 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2186 dev_root_level, 8); 2187 2188 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2189 csum_root, 64); 2190 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2191 csum_root_gen, 64); 2192 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2193 csum_root_level, 8); 2194 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2195 total_bytes, 64); 2196 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2197 bytes_used, 64); 2198 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2199 num_devices, 64); 2200 2201 /* struct btrfs_balance_item */ 2202 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2203 2204 static inline void btrfs_balance_data(const struct extent_buffer *eb, 2205 const struct btrfs_balance_item *bi, 2206 struct btrfs_disk_balance_args *ba) 2207 { 2208 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2209 } 2210 2211 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2212 struct btrfs_balance_item *bi, 2213 const struct btrfs_disk_balance_args *ba) 2214 { 2215 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2216 } 2217 2218 static inline void btrfs_balance_meta(const struct extent_buffer *eb, 2219 const struct btrfs_balance_item *bi, 2220 struct btrfs_disk_balance_args *ba) 2221 { 2222 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2223 } 2224 2225 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2226 struct btrfs_balance_item *bi, 2227 const struct btrfs_disk_balance_args *ba) 2228 { 2229 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2230 } 2231 2232 static inline void btrfs_balance_sys(const struct extent_buffer *eb, 2233 const struct btrfs_balance_item *bi, 2234 struct btrfs_disk_balance_args *ba) 2235 { 2236 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2237 } 2238 2239 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2240 struct btrfs_balance_item *bi, 2241 const struct btrfs_disk_balance_args *ba) 2242 { 2243 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2244 } 2245 2246 static inline void 2247 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2248 const struct btrfs_disk_balance_args *disk) 2249 { 2250 memset(cpu, 0, sizeof(*cpu)); 2251 2252 cpu->profiles = le64_to_cpu(disk->profiles); 2253 cpu->usage = le64_to_cpu(disk->usage); 2254 cpu->devid = le64_to_cpu(disk->devid); 2255 cpu->pstart = le64_to_cpu(disk->pstart); 2256 cpu->pend = le64_to_cpu(disk->pend); 2257 cpu->vstart = le64_to_cpu(disk->vstart); 2258 cpu->vend = le64_to_cpu(disk->vend); 2259 cpu->target = le64_to_cpu(disk->target); 2260 cpu->flags = le64_to_cpu(disk->flags); 2261 cpu->limit = le64_to_cpu(disk->limit); 2262 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2263 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2264 } 2265 2266 static inline void 2267 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2268 const struct btrfs_balance_args *cpu) 2269 { 2270 memset(disk, 0, sizeof(*disk)); 2271 2272 disk->profiles = cpu_to_le64(cpu->profiles); 2273 disk->usage = cpu_to_le64(cpu->usage); 2274 disk->devid = cpu_to_le64(cpu->devid); 2275 disk->pstart = cpu_to_le64(cpu->pstart); 2276 disk->pend = cpu_to_le64(cpu->pend); 2277 disk->vstart = cpu_to_le64(cpu->vstart); 2278 disk->vend = cpu_to_le64(cpu->vend); 2279 disk->target = cpu_to_le64(cpu->target); 2280 disk->flags = cpu_to_le64(cpu->flags); 2281 disk->limit = cpu_to_le64(cpu->limit); 2282 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2283 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2284 } 2285 2286 /* struct btrfs_super_block */ 2287 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2288 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2289 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2290 generation, 64); 2291 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2292 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2293 struct btrfs_super_block, sys_chunk_array_size, 32); 2294 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2295 struct btrfs_super_block, chunk_root_generation, 64); 2296 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2297 root_level, 8); 2298 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2299 chunk_root, 64); 2300 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2301 chunk_root_level, 8); 2302 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2303 log_root, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2305 log_root_transid, 64); 2306 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2307 log_root_level, 8); 2308 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2309 total_bytes, 64); 2310 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2311 bytes_used, 64); 2312 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2313 sectorsize, 32); 2314 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2315 nodesize, 32); 2316 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2317 stripesize, 32); 2318 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2319 root_dir_objectid, 64); 2320 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2321 num_devices, 64); 2322 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2323 compat_flags, 64); 2324 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2325 compat_ro_flags, 64); 2326 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2327 incompat_flags, 64); 2328 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2329 csum_type, 16); 2330 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2331 cache_generation, 64); 2332 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2333 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2334 uuid_tree_generation, 64); 2335 2336 static inline int btrfs_super_csum_size(const struct btrfs_super_block *s) 2337 { 2338 u16 t = btrfs_super_csum_type(s); 2339 /* 2340 * csum type is validated at mount time 2341 */ 2342 return btrfs_csum_sizes[t]; 2343 } 2344 2345 2346 /* 2347 * The leaf data grows from end-to-front in the node. 2348 * this returns the address of the start of the last item, 2349 * which is the stop of the leaf data stack 2350 */ 2351 static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info, 2352 const struct extent_buffer *leaf) 2353 { 2354 u32 nr = btrfs_header_nritems(leaf); 2355 2356 if (nr == 0) 2357 return BTRFS_LEAF_DATA_SIZE(fs_info); 2358 return btrfs_item_offset_nr(leaf, nr - 1); 2359 } 2360 2361 /* struct btrfs_file_extent_item */ 2362 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2363 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2364 struct btrfs_file_extent_item, disk_bytenr, 64); 2365 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2366 struct btrfs_file_extent_item, offset, 64); 2367 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2368 struct btrfs_file_extent_item, generation, 64); 2369 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2370 struct btrfs_file_extent_item, num_bytes, 64); 2371 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2372 struct btrfs_file_extent_item, disk_num_bytes, 64); 2373 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2374 struct btrfs_file_extent_item, compression, 8); 2375 2376 static inline unsigned long 2377 btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) 2378 { 2379 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2380 } 2381 2382 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2383 { 2384 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2385 } 2386 2387 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2388 disk_bytenr, 64); 2389 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2390 generation, 64); 2391 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2392 disk_num_bytes, 64); 2393 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2394 offset, 64); 2395 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2396 num_bytes, 64); 2397 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2398 ram_bytes, 64); 2399 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2400 compression, 8); 2401 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2402 encryption, 8); 2403 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2404 other_encoding, 16); 2405 2406 /* 2407 * this returns the number of bytes used by the item on disk, minus the 2408 * size of any extent headers. If a file is compressed on disk, this is 2409 * the compressed size 2410 */ 2411 static inline u32 btrfs_file_extent_inline_item_len( 2412 const struct extent_buffer *eb, 2413 struct btrfs_item *e) 2414 { 2415 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2416 } 2417 2418 /* this returns the number of file bytes represented by the inline item. 2419 * If an item is compressed, this is the uncompressed size 2420 */ 2421 static inline u32 btrfs_file_extent_inline_len(const struct extent_buffer *eb, 2422 int slot, 2423 const struct btrfs_file_extent_item *fi) 2424 { 2425 struct btrfs_map_token token; 2426 2427 btrfs_init_map_token(&token); 2428 /* 2429 * return the space used on disk if this item isn't 2430 * compressed or encoded 2431 */ 2432 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2433 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2434 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2435 return btrfs_file_extent_inline_item_len(eb, 2436 btrfs_item_nr(slot)); 2437 } 2438 2439 /* otherwise use the ram bytes field */ 2440 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2441 } 2442 2443 2444 /* btrfs_dev_stats_item */ 2445 static inline u64 btrfs_dev_stats_value(const struct extent_buffer *eb, 2446 const struct btrfs_dev_stats_item *ptr, 2447 int index) 2448 { 2449 u64 val; 2450 2451 read_extent_buffer(eb, &val, 2452 offsetof(struct btrfs_dev_stats_item, values) + 2453 ((unsigned long)ptr) + (index * sizeof(u64)), 2454 sizeof(val)); 2455 return val; 2456 } 2457 2458 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2459 struct btrfs_dev_stats_item *ptr, 2460 int index, u64 val) 2461 { 2462 write_extent_buffer(eb, &val, 2463 offsetof(struct btrfs_dev_stats_item, values) + 2464 ((unsigned long)ptr) + (index * sizeof(u64)), 2465 sizeof(val)); 2466 } 2467 2468 /* btrfs_qgroup_status_item */ 2469 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2470 generation, 64); 2471 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2472 version, 64); 2473 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2474 flags, 64); 2475 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2476 rescan, 64); 2477 2478 /* btrfs_qgroup_info_item */ 2479 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2480 generation, 64); 2481 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2482 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2483 rfer_cmpr, 64); 2484 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2485 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2486 excl_cmpr, 64); 2487 2488 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2489 struct btrfs_qgroup_info_item, generation, 64); 2490 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2491 rfer, 64); 2492 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2493 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2494 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2495 excl, 64); 2496 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2497 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2498 2499 /* btrfs_qgroup_limit_item */ 2500 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2501 flags, 64); 2502 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2503 max_rfer, 64); 2504 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2505 max_excl, 64); 2506 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2507 rsv_rfer, 64); 2508 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2509 rsv_excl, 64); 2510 2511 /* btrfs_dev_replace_item */ 2512 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2513 struct btrfs_dev_replace_item, src_devid, 64); 2514 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2515 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2516 64); 2517 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2518 replace_state, 64); 2519 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2520 time_started, 64); 2521 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2522 time_stopped, 64); 2523 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2524 num_write_errors, 64); 2525 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2526 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2527 64); 2528 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2529 cursor_left, 64); 2530 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2531 cursor_right, 64); 2532 2533 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2534 struct btrfs_dev_replace_item, src_devid, 64); 2535 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2536 struct btrfs_dev_replace_item, 2537 cont_reading_from_srcdev_mode, 64); 2538 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2539 struct btrfs_dev_replace_item, replace_state, 64); 2540 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2541 struct btrfs_dev_replace_item, time_started, 64); 2542 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2543 struct btrfs_dev_replace_item, time_stopped, 64); 2544 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2545 struct btrfs_dev_replace_item, num_write_errors, 64); 2546 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2547 struct btrfs_dev_replace_item, 2548 num_uncorrectable_read_errors, 64); 2549 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2550 struct btrfs_dev_replace_item, cursor_left, 64); 2551 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2552 struct btrfs_dev_replace_item, cursor_right, 64); 2553 2554 /* helper function to cast into the data area of the leaf. */ 2555 #define btrfs_item_ptr(leaf, slot, type) \ 2556 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2557 btrfs_item_offset_nr(leaf, slot))) 2558 2559 #define btrfs_item_ptr_offset(leaf, slot) \ 2560 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2561 btrfs_item_offset_nr(leaf, slot))) 2562 2563 static inline u64 btrfs_name_hash(const char *name, int len) 2564 { 2565 return crc32c((u32)~1, name, len); 2566 } 2567 2568 /* 2569 * Figure the key offset of an extended inode ref 2570 */ 2571 static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, 2572 int len) 2573 { 2574 return (u64) crc32c(parent_objectid, name, len); 2575 } 2576 2577 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2578 { 2579 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2580 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2581 } 2582 2583 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2584 { 2585 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2586 } 2587 2588 /* extent-tree.c */ 2589 2590 enum btrfs_inline_ref_type { 2591 BTRFS_REF_TYPE_INVALID = 0, 2592 BTRFS_REF_TYPE_BLOCK = 1, 2593 BTRFS_REF_TYPE_DATA = 2, 2594 BTRFS_REF_TYPE_ANY = 3, 2595 }; 2596 2597 int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, 2598 struct btrfs_extent_inline_ref *iref, 2599 enum btrfs_inline_ref_type is_data); 2600 2601 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2602 2603 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2604 unsigned num_items) 2605 { 2606 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2607 } 2608 2609 /* 2610 * Doing a truncate won't result in new nodes or leaves, just what we need for 2611 * COW. 2612 */ 2613 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2614 unsigned num_items) 2615 { 2616 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2617 } 2618 2619 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2620 struct btrfs_fs_info *fs_info); 2621 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2622 struct btrfs_fs_info *fs_info); 2623 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2624 const u64 start); 2625 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2626 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2627 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2628 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2629 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2630 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2631 unsigned long count); 2632 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2633 unsigned long count, u64 transid, int wait); 2634 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2635 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2636 struct btrfs_fs_info *fs_info, u64 bytenr, 2637 u64 offset, int metadata, u64 *refs, u64 *flags); 2638 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2639 u64 bytenr, u64 num, int reserved); 2640 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2641 u64 bytenr, u64 num_bytes); 2642 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2643 struct extent_buffer *eb); 2644 int btrfs_cross_ref_exist(struct btrfs_root *root, 2645 u64 objectid, u64 offset, u64 bytenr); 2646 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2647 struct btrfs_fs_info *info, 2648 u64 bytenr); 2649 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2650 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2651 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2652 struct btrfs_root *root, 2653 u64 parent, u64 root_objectid, 2654 const struct btrfs_disk_key *key, 2655 int level, u64 hint, 2656 u64 empty_size); 2657 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2658 struct btrfs_root *root, 2659 struct extent_buffer *buf, 2660 u64 parent, int last_ref); 2661 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2662 struct btrfs_root *root, u64 owner, 2663 u64 offset, u64 ram_bytes, 2664 struct btrfs_key *ins); 2665 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2666 struct btrfs_fs_info *fs_info, 2667 u64 root_objectid, u64 owner, u64 offset, 2668 struct btrfs_key *ins); 2669 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2670 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2671 struct btrfs_key *ins, int is_data, int delalloc); 2672 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2673 struct extent_buffer *buf, int full_backref); 2674 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2675 struct extent_buffer *buf, int full_backref); 2676 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2677 struct btrfs_fs_info *fs_info, 2678 u64 bytenr, u64 num_bytes, u64 flags, 2679 int level, int is_data); 2680 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2681 struct btrfs_root *root, 2682 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2683 u64 owner, u64 offset); 2684 2685 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2686 u64 start, u64 len, int delalloc); 2687 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2688 u64 start, u64 len); 2689 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2690 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); 2691 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2692 struct btrfs_root *root, 2693 u64 bytenr, u64 num_bytes, u64 parent, 2694 u64 root_objectid, u64 owner, u64 offset); 2695 2696 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans); 2697 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2698 struct btrfs_fs_info *fs_info); 2699 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2700 struct btrfs_fs_info *fs_info); 2701 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2702 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2703 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2704 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2705 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2706 struct btrfs_fs_info *fs_info, u64 bytes_used, 2707 u64 type, u64 chunk_offset, u64 size); 2708 void btrfs_add_raid_kobjects(struct btrfs_fs_info *fs_info); 2709 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2710 struct btrfs_fs_info *fs_info, 2711 const u64 chunk_offset); 2712 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2713 struct btrfs_fs_info *fs_info, u64 group_start, 2714 struct extent_map *em); 2715 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2716 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2717 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2718 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans); 2719 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2720 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2721 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2722 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2723 2724 enum btrfs_reserve_flush_enum { 2725 /* If we are in the transaction, we can't flush anything.*/ 2726 BTRFS_RESERVE_NO_FLUSH, 2727 /* 2728 * Flushing delalloc may cause deadlock somewhere, in this 2729 * case, use FLUSH LIMIT 2730 */ 2731 BTRFS_RESERVE_FLUSH_LIMIT, 2732 BTRFS_RESERVE_FLUSH_ALL, 2733 }; 2734 2735 enum btrfs_flush_state { 2736 FLUSH_DELAYED_ITEMS_NR = 1, 2737 FLUSH_DELAYED_ITEMS = 2, 2738 FLUSH_DELALLOC = 3, 2739 FLUSH_DELALLOC_WAIT = 4, 2740 ALLOC_CHUNK = 5, 2741 COMMIT_TRANS = 6, 2742 }; 2743 2744 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2745 int btrfs_check_data_free_space(struct inode *inode, 2746 struct extent_changeset **reserved, u64 start, u64 len); 2747 void btrfs_free_reserved_data_space(struct inode *inode, 2748 struct extent_changeset *reserved, u64 start, u64 len); 2749 void btrfs_delalloc_release_space(struct inode *inode, 2750 struct extent_changeset *reserved, 2751 u64 start, u64 len, bool qgroup_free); 2752 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2753 u64 len); 2754 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2755 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2756 struct btrfs_inode *inode); 2757 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2758 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2759 struct btrfs_block_rsv *rsv, 2760 int nitems, 2761 u64 *qgroup_reserved, bool use_global_rsv); 2762 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2763 struct btrfs_block_rsv *rsv); 2764 void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, 2765 bool qgroup_free); 2766 2767 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2768 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, 2769 bool qgroup_free); 2770 int btrfs_delalloc_reserve_space(struct inode *inode, 2771 struct extent_changeset **reserved, u64 start, u64 len); 2772 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2773 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2774 unsigned short type); 2775 void btrfs_init_metadata_block_rsv(struct btrfs_fs_info *fs_info, 2776 struct btrfs_block_rsv *rsv, 2777 unsigned short type); 2778 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2779 struct btrfs_block_rsv *rsv); 2780 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2781 int btrfs_block_rsv_add(struct btrfs_root *root, 2782 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2783 enum btrfs_reserve_flush_enum flush); 2784 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2785 int btrfs_block_rsv_refill(struct btrfs_root *root, 2786 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2787 enum btrfs_reserve_flush_enum flush); 2788 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2789 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2790 int update_size); 2791 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2792 struct btrfs_block_rsv *dest, u64 num_bytes, 2793 int min_factor); 2794 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2795 struct btrfs_block_rsv *block_rsv, 2796 u64 num_bytes); 2797 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2798 struct btrfs_block_group_cache *cache); 2799 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2800 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2801 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2802 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2803 u64 start, u64 end); 2804 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2805 u64 num_bytes, u64 *actual_bytes); 2806 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2807 struct btrfs_fs_info *fs_info, u64 type); 2808 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2809 2810 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2811 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2812 struct btrfs_fs_info *fs_info); 2813 int btrfs_start_write_no_snapshotting(struct btrfs_root *root); 2814 void btrfs_end_write_no_snapshotting(struct btrfs_root *root); 2815 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2816 void check_system_chunk(struct btrfs_trans_handle *trans, 2817 struct btrfs_fs_info *fs_info, const u64 type); 2818 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2819 struct btrfs_fs_info *info, u64 start, u64 end); 2820 2821 /* ctree.c */ 2822 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2823 int level, int *slot); 2824 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2825 int btrfs_previous_item(struct btrfs_root *root, 2826 struct btrfs_path *path, u64 min_objectid, 2827 int type); 2828 int btrfs_previous_extent_item(struct btrfs_root *root, 2829 struct btrfs_path *path, u64 min_objectid); 2830 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2831 struct btrfs_path *path, 2832 const struct btrfs_key *new_key); 2833 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2834 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2835 struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); 2836 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2837 struct btrfs_key *key, int lowest_level, 2838 u64 min_trans); 2839 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2840 struct btrfs_path *path, 2841 u64 min_trans); 2842 enum btrfs_compare_tree_result { 2843 BTRFS_COMPARE_TREE_NEW, 2844 BTRFS_COMPARE_TREE_DELETED, 2845 BTRFS_COMPARE_TREE_CHANGED, 2846 BTRFS_COMPARE_TREE_SAME, 2847 }; 2848 typedef int (*btrfs_changed_cb_t)(struct btrfs_path *left_path, 2849 struct btrfs_path *right_path, 2850 struct btrfs_key *key, 2851 enum btrfs_compare_tree_result result, 2852 void *ctx); 2853 int btrfs_compare_trees(struct btrfs_root *left_root, 2854 struct btrfs_root *right_root, 2855 btrfs_changed_cb_t cb, void *ctx); 2856 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2857 struct btrfs_root *root, struct extent_buffer *buf, 2858 struct extent_buffer *parent, int parent_slot, 2859 struct extent_buffer **cow_ret); 2860 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2861 struct btrfs_root *root, 2862 struct extent_buffer *buf, 2863 struct extent_buffer **cow_ret, u64 new_root_objectid); 2864 int btrfs_block_can_be_shared(struct btrfs_root *root, 2865 struct extent_buffer *buf); 2866 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2867 u32 data_size); 2868 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2869 struct btrfs_path *path, u32 new_size, int from_end); 2870 int btrfs_split_item(struct btrfs_trans_handle *trans, 2871 struct btrfs_root *root, 2872 struct btrfs_path *path, 2873 const struct btrfs_key *new_key, 2874 unsigned long split_offset); 2875 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2876 struct btrfs_root *root, 2877 struct btrfs_path *path, 2878 const struct btrfs_key *new_key); 2879 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2880 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2881 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2882 const struct btrfs_key *key, struct btrfs_path *p, 2883 int ins_len, int cow); 2884 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2885 struct btrfs_path *p, u64 time_seq); 2886 int btrfs_search_slot_for_read(struct btrfs_root *root, 2887 const struct btrfs_key *key, 2888 struct btrfs_path *p, int find_higher, 2889 int return_any); 2890 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2891 struct btrfs_root *root, struct extent_buffer *parent, 2892 int start_slot, u64 *last_ret, 2893 struct btrfs_key *progress); 2894 void btrfs_release_path(struct btrfs_path *p); 2895 struct btrfs_path *btrfs_alloc_path(void); 2896 void btrfs_free_path(struct btrfs_path *p); 2897 void btrfs_set_path_blocking(struct btrfs_path *p); 2898 void btrfs_clear_path_blocking(struct btrfs_path *p, 2899 struct extent_buffer *held, int held_rw); 2900 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2901 2902 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2903 struct btrfs_path *path, int slot, int nr); 2904 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2905 struct btrfs_root *root, 2906 struct btrfs_path *path) 2907 { 2908 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2909 } 2910 2911 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2912 const struct btrfs_key *cpu_key, u32 *data_size, 2913 u32 total_data, u32 total_size, int nr); 2914 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2915 const struct btrfs_key *key, void *data, u32 data_size); 2916 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2917 struct btrfs_root *root, 2918 struct btrfs_path *path, 2919 const struct btrfs_key *cpu_key, u32 *data_size, 2920 int nr); 2921 2922 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2923 struct btrfs_root *root, 2924 struct btrfs_path *path, 2925 const struct btrfs_key *key, 2926 u32 data_size) 2927 { 2928 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2929 } 2930 2931 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2932 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2933 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2934 u64 time_seq); 2935 static inline int btrfs_next_old_item(struct btrfs_root *root, 2936 struct btrfs_path *p, u64 time_seq) 2937 { 2938 ++p->slots[0]; 2939 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2940 return btrfs_next_old_leaf(root, p, time_seq); 2941 return 0; 2942 } 2943 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2944 { 2945 return btrfs_next_old_item(root, p, 0); 2946 } 2947 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2948 struct extent_buffer *leaf); 2949 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2950 struct btrfs_block_rsv *block_rsv, 2951 int update_ref, int for_reloc); 2952 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2953 struct btrfs_root *root, 2954 struct extent_buffer *node, 2955 struct extent_buffer *parent); 2956 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2957 { 2958 /* 2959 * Do it this way so we only ever do one test_bit in the normal case. 2960 */ 2961 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2962 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2963 return 2; 2964 return 1; 2965 } 2966 return 0; 2967 } 2968 2969 /* 2970 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2971 * anything except sleeping. This function is used to check the status of 2972 * the fs. 2973 */ 2974 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2975 { 2976 return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); 2977 } 2978 2979 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2980 { 2981 kfree(fs_info->balance_ctl); 2982 kfree(fs_info->delayed_root); 2983 kfree(fs_info->extent_root); 2984 kfree(fs_info->tree_root); 2985 kfree(fs_info->chunk_root); 2986 kfree(fs_info->dev_root); 2987 kfree(fs_info->csum_root); 2988 kfree(fs_info->quota_root); 2989 kfree(fs_info->uuid_root); 2990 kfree(fs_info->free_space_root); 2991 kfree(fs_info->super_copy); 2992 kfree(fs_info->super_for_commit); 2993 security_free_mnt_opts(&fs_info->security_opts); 2994 kvfree(fs_info); 2995 } 2996 2997 /* tree mod log functions from ctree.c */ 2998 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2999 struct seq_list *elem); 3000 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 3001 struct seq_list *elem); 3002 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 3003 3004 /* root-item.c */ 3005 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 3006 struct btrfs_fs_info *fs_info, 3007 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 3008 const char *name, int name_len); 3009 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 3010 struct btrfs_fs_info *fs_info, 3011 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 3012 const char *name, int name_len); 3013 int btrfs_del_root(struct btrfs_trans_handle *trans, 3014 struct btrfs_fs_info *fs_info, const struct btrfs_key *key); 3015 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 3016 const struct btrfs_key *key, 3017 struct btrfs_root_item *item); 3018 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 3019 struct btrfs_root *root, 3020 struct btrfs_key *key, 3021 struct btrfs_root_item *item); 3022 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 3023 struct btrfs_path *path, struct btrfs_root_item *root_item, 3024 struct btrfs_key *root_key); 3025 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 3026 void btrfs_set_root_node(struct btrfs_root_item *item, 3027 struct extent_buffer *node); 3028 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 3029 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 3030 struct btrfs_root *root); 3031 3032 /* uuid-tree.c */ 3033 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 3034 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3035 u64 subid); 3036 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 3037 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3038 u64 subid); 3039 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3040 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3041 u64)); 3042 3043 /* dir-item.c */ 3044 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3045 const char *name, int name_len); 3046 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3047 struct btrfs_root *root, const char *name, 3048 int name_len, struct btrfs_inode *dir, 3049 struct btrfs_key *location, u8 type, u64 index); 3050 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3051 struct btrfs_root *root, 3052 struct btrfs_path *path, u64 dir, 3053 const char *name, int name_len, 3054 int mod); 3055 struct btrfs_dir_item * 3056 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3057 struct btrfs_root *root, 3058 struct btrfs_path *path, u64 dir, 3059 u64 objectid, const char *name, int name_len, 3060 int mod); 3061 struct btrfs_dir_item * 3062 btrfs_search_dir_index_item(struct btrfs_root *root, 3063 struct btrfs_path *path, u64 dirid, 3064 const char *name, int name_len); 3065 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3066 struct btrfs_root *root, 3067 struct btrfs_path *path, 3068 struct btrfs_dir_item *di); 3069 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3070 struct btrfs_root *root, 3071 struct btrfs_path *path, u64 objectid, 3072 const char *name, u16 name_len, 3073 const void *data, u16 data_len); 3074 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3075 struct btrfs_root *root, 3076 struct btrfs_path *path, u64 dir, 3077 const char *name, u16 name_len, 3078 int mod); 3079 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3080 struct btrfs_path *path, 3081 const char *name, 3082 int name_len); 3083 3084 /* orphan.c */ 3085 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3086 struct btrfs_root *root, u64 offset); 3087 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3088 struct btrfs_root *root, u64 offset); 3089 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3090 3091 /* inode-item.c */ 3092 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3093 struct btrfs_root *root, 3094 const char *name, int name_len, 3095 u64 inode_objectid, u64 ref_objectid, u64 index); 3096 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3097 struct btrfs_root *root, 3098 const char *name, int name_len, 3099 u64 inode_objectid, u64 ref_objectid, u64 *index); 3100 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3101 struct btrfs_root *root, 3102 struct btrfs_path *path, u64 objectid); 3103 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3104 *root, struct btrfs_path *path, 3105 struct btrfs_key *location, int mod); 3106 3107 struct btrfs_inode_extref * 3108 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3109 struct btrfs_root *root, 3110 struct btrfs_path *path, 3111 const char *name, int name_len, 3112 u64 inode_objectid, u64 ref_objectid, int ins_len, 3113 int cow); 3114 3115 int btrfs_find_name_in_backref(struct extent_buffer *leaf, int slot, 3116 const char *name, 3117 int name_len, struct btrfs_inode_ref **ref_ret); 3118 int btrfs_find_name_in_ext_backref(struct extent_buffer *leaf, int slot, 3119 u64 ref_objectid, const char *name, 3120 int name_len, 3121 struct btrfs_inode_extref **extref_ret); 3122 3123 /* file-item.c */ 3124 struct btrfs_dio_private; 3125 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3126 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3127 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3128 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3129 u64 logical_offset); 3130 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3131 struct btrfs_root *root, 3132 u64 objectid, u64 pos, 3133 u64 disk_offset, u64 disk_num_bytes, 3134 u64 num_bytes, u64 offset, u64 ram_bytes, 3135 u8 compression, u8 encryption, u16 other_encoding); 3136 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3137 struct btrfs_root *root, 3138 struct btrfs_path *path, u64 objectid, 3139 u64 bytenr, int mod); 3140 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3141 struct btrfs_root *root, 3142 struct btrfs_ordered_sum *sums); 3143 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3144 u64 file_start, int contig); 3145 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3146 struct list_head *list, int search_commit); 3147 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3148 const struct btrfs_path *path, 3149 struct btrfs_file_extent_item *fi, 3150 const bool new_inline, 3151 struct extent_map *em); 3152 3153 /* inode.c */ 3154 struct btrfs_delalloc_work { 3155 struct inode *inode; 3156 int delay_iput; 3157 struct completion completion; 3158 struct list_head list; 3159 struct btrfs_work work; 3160 }; 3161 3162 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3163 int delay_iput); 3164 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3165 3166 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3167 struct page *page, size_t pg_offset, u64 start, 3168 u64 len, int create); 3169 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3170 u64 *orig_start, u64 *orig_block_len, 3171 u64 *ram_bytes); 3172 3173 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3174 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3175 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3176 struct btrfs_root *root, 3177 struct btrfs_inode *dir, struct btrfs_inode *inode, 3178 const char *name, int name_len); 3179 int btrfs_add_link(struct btrfs_trans_handle *trans, 3180 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3181 const char *name, int name_len, int add_backref, u64 index); 3182 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3183 struct btrfs_root *root, 3184 struct inode *dir, u64 objectid, 3185 const char *name, int name_len); 3186 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3187 int front); 3188 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3189 struct btrfs_root *root, 3190 struct inode *inode, u64 new_size, 3191 u32 min_type); 3192 3193 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3194 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3195 int nr); 3196 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3197 unsigned int extra_bits, 3198 struct extent_state **cached_state, int dedupe); 3199 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3200 struct btrfs_root *new_root, 3201 struct btrfs_root *parent_root, 3202 u64 new_dirid); 3203 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3204 size_t size, struct bio *bio, 3205 unsigned long bio_flags); 3206 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3207 int btrfs_page_mkwrite(struct vm_fault *vmf); 3208 int btrfs_readpage(struct file *file, struct page *page); 3209 void btrfs_evict_inode(struct inode *inode); 3210 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3211 struct inode *btrfs_alloc_inode(struct super_block *sb); 3212 void btrfs_destroy_inode(struct inode *inode); 3213 int btrfs_drop_inode(struct inode *inode); 3214 int __init btrfs_init_cachep(void); 3215 void __cold btrfs_destroy_cachep(void); 3216 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3217 struct btrfs_root *root, int *was_new); 3218 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3219 struct page *page, size_t pg_offset, 3220 u64 start, u64 end, int create); 3221 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3222 struct btrfs_root *root, 3223 struct inode *inode); 3224 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3225 struct btrfs_root *root, struct inode *inode); 3226 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3227 struct btrfs_inode *inode); 3228 int btrfs_orphan_cleanup(struct btrfs_root *root); 3229 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3230 struct btrfs_root *root); 3231 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3232 void btrfs_invalidate_inodes(struct btrfs_root *root); 3233 void btrfs_add_delayed_iput(struct inode *inode); 3234 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3235 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3236 u64 start, u64 num_bytes, u64 min_size, 3237 loff_t actual_len, u64 *alloc_hint); 3238 int btrfs_prealloc_file_range_trans(struct inode *inode, 3239 struct btrfs_trans_handle *trans, int mode, 3240 u64 start, u64 num_bytes, u64 min_size, 3241 loff_t actual_len, u64 *alloc_hint); 3242 extern const struct dentry_operations btrfs_dentry_operations; 3243 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3244 void btrfs_test_inode_set_ops(struct inode *inode); 3245 #endif 3246 3247 /* ioctl.c */ 3248 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3249 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3250 int btrfs_ioctl_get_supported_features(void __user *arg); 3251 void btrfs_update_iflags(struct inode *inode); 3252 int btrfs_is_empty_uuid(u8 *uuid); 3253 int btrfs_defrag_file(struct inode *inode, struct file *file, 3254 struct btrfs_ioctl_defrag_range_args *range, 3255 u64 newer_than, unsigned long max_pages); 3256 void btrfs_get_block_group_info(struct list_head *groups_list, 3257 struct btrfs_ioctl_space_info *space); 3258 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3259 struct btrfs_ioctl_balance_args *bargs); 3260 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3261 struct file *dst_file, u64 dst_loff); 3262 3263 /* file.c */ 3264 int __init btrfs_auto_defrag_init(void); 3265 void __cold btrfs_auto_defrag_exit(void); 3266 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3267 struct btrfs_inode *inode); 3268 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3269 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3270 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3271 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3272 int skip_pinned); 3273 extern const struct file_operations btrfs_file_operations; 3274 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3275 struct btrfs_root *root, struct inode *inode, 3276 struct btrfs_path *path, u64 start, u64 end, 3277 u64 *drop_end, int drop_cache, 3278 int replace_extent, 3279 u32 extent_item_size, 3280 int *key_inserted); 3281 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3282 struct btrfs_root *root, struct inode *inode, u64 start, 3283 u64 end, int drop_cache); 3284 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3285 struct btrfs_inode *inode, u64 start, u64 end); 3286 int btrfs_release_file(struct inode *inode, struct file *file); 3287 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3288 size_t num_pages, loff_t pos, size_t write_bytes, 3289 struct extent_state **cached); 3290 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3291 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3292 struct file *file_out, loff_t pos_out, u64 len); 3293 3294 /* tree-defrag.c */ 3295 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3296 struct btrfs_root *root); 3297 3298 /* sysfs.c */ 3299 int __init btrfs_init_sysfs(void); 3300 void __cold btrfs_exit_sysfs(void); 3301 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3302 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3303 3304 /* super.c */ 3305 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3306 unsigned long new_flags); 3307 int btrfs_sync_fs(struct super_block *sb, int wait); 3308 3309 static inline __printf(2, 3) __cold 3310 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3311 { 3312 } 3313 3314 #ifdef CONFIG_PRINTK 3315 __printf(2, 3) 3316 __cold 3317 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3318 #else 3319 #define btrfs_printk(fs_info, fmt, args...) \ 3320 btrfs_no_printk(fs_info, fmt, ##args) 3321 #endif 3322 3323 #define btrfs_emerg(fs_info, fmt, args...) \ 3324 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3325 #define btrfs_alert(fs_info, fmt, args...) \ 3326 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3327 #define btrfs_crit(fs_info, fmt, args...) \ 3328 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3329 #define btrfs_err(fs_info, fmt, args...) \ 3330 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3331 #define btrfs_warn(fs_info, fmt, args...) \ 3332 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3333 #define btrfs_notice(fs_info, fmt, args...) \ 3334 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3335 #define btrfs_info(fs_info, fmt, args...) \ 3336 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3337 3338 /* 3339 * Wrappers that use printk_in_rcu 3340 */ 3341 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3342 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3343 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3344 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3345 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3346 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3347 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3348 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3349 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3350 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3351 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3352 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3353 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3354 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3355 3356 /* 3357 * Wrappers that use a ratelimited printk_in_rcu 3358 */ 3359 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3360 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3361 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3362 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3363 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3364 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3365 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3366 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3367 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3368 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3369 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3370 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3371 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3372 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3373 3374 /* 3375 * Wrappers that use a ratelimited printk 3376 */ 3377 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3378 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3379 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3380 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3381 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3382 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3383 #define btrfs_err_rl(fs_info, fmt, args...) \ 3384 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3385 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3386 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3387 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3388 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3389 #define btrfs_info_rl(fs_info, fmt, args...) \ 3390 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3391 3392 #if defined(CONFIG_DYNAMIC_DEBUG) 3393 #define btrfs_debug(fs_info, fmt, args...) \ 3394 do { \ 3395 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3396 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3397 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3398 } while (0) 3399 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3400 do { \ 3401 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3402 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3403 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3404 } while (0) 3405 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3406 do { \ 3407 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3408 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3409 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3410 ##args);\ 3411 } while (0) 3412 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3413 do { \ 3414 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3415 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3416 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3417 ##args); \ 3418 } while (0) 3419 #elif defined(DEBUG) 3420 #define btrfs_debug(fs_info, fmt, args...) \ 3421 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3422 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3423 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3424 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3425 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3426 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3427 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3428 #else 3429 #define btrfs_debug(fs_info, fmt, args...) \ 3430 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3431 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3432 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3433 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3434 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3435 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3436 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3437 #endif 3438 3439 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3440 do { \ 3441 rcu_read_lock(); \ 3442 btrfs_printk(fs_info, fmt, ##args); \ 3443 rcu_read_unlock(); \ 3444 } while (0) 3445 3446 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3447 do { \ 3448 static DEFINE_RATELIMIT_STATE(_rs, \ 3449 DEFAULT_RATELIMIT_INTERVAL, \ 3450 DEFAULT_RATELIMIT_BURST); \ 3451 if (__ratelimit(&_rs)) \ 3452 btrfs_printk(fs_info, fmt, ##args); \ 3453 } while (0) 3454 3455 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3456 do { \ 3457 rcu_read_lock(); \ 3458 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3459 rcu_read_unlock(); \ 3460 } while (0) 3461 3462 #ifdef CONFIG_BTRFS_ASSERT 3463 3464 __cold 3465 static inline void assfail(char *expr, char *file, int line) 3466 { 3467 pr_err("assertion failed: %s, file: %s, line: %d\n", 3468 expr, file, line); 3469 BUG(); 3470 } 3471 3472 #define ASSERT(expr) \ 3473 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3474 #else 3475 #define ASSERT(expr) ((void)0) 3476 #endif 3477 3478 __printf(5, 6) 3479 __cold 3480 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3481 unsigned int line, int errno, const char *fmt, ...); 3482 3483 const char *btrfs_decode_error(int errno); 3484 3485 __cold 3486 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3487 const char *function, 3488 unsigned int line, int errno); 3489 3490 /* 3491 * Call btrfs_abort_transaction as early as possible when an error condition is 3492 * detected, that way the exact line number is reported. 3493 */ 3494 #define btrfs_abort_transaction(trans, errno) \ 3495 do { \ 3496 /* Report first abort since mount */ \ 3497 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3498 &((trans)->fs_info->fs_state))) { \ 3499 if ((errno) != -EIO) { \ 3500 WARN(1, KERN_DEBUG \ 3501 "BTRFS: Transaction aborted (error %d)\n", \ 3502 (errno)); \ 3503 } else { \ 3504 btrfs_debug((trans)->fs_info, \ 3505 "Transaction aborted (error %d)", \ 3506 (errno)); \ 3507 } \ 3508 } \ 3509 __btrfs_abort_transaction((trans), __func__, \ 3510 __LINE__, (errno)); \ 3511 } while (0) 3512 3513 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3514 do { \ 3515 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3516 (errno), fmt, ##args); \ 3517 } while (0) 3518 3519 __printf(5, 6) 3520 __cold 3521 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3522 unsigned int line, int errno, const char *fmt, ...); 3523 /* 3524 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3525 * will panic(). Otherwise we BUG() here. 3526 */ 3527 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3528 do { \ 3529 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3530 BUG(); \ 3531 } while (0) 3532 3533 3534 /* compatibility and incompatibility defines */ 3535 3536 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3537 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3538 3539 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3540 u64 flag) 3541 { 3542 struct btrfs_super_block *disk_super; 3543 u64 features; 3544 3545 disk_super = fs_info->super_copy; 3546 features = btrfs_super_incompat_flags(disk_super); 3547 if (!(features & flag)) { 3548 spin_lock(&fs_info->super_lock); 3549 features = btrfs_super_incompat_flags(disk_super); 3550 if (!(features & flag)) { 3551 features |= flag; 3552 btrfs_set_super_incompat_flags(disk_super, features); 3553 btrfs_info(fs_info, "setting %llu feature flag", 3554 flag); 3555 } 3556 spin_unlock(&fs_info->super_lock); 3557 } 3558 } 3559 3560 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3561 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3562 3563 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3564 u64 flag) 3565 { 3566 struct btrfs_super_block *disk_super; 3567 u64 features; 3568 3569 disk_super = fs_info->super_copy; 3570 features = btrfs_super_incompat_flags(disk_super); 3571 if (features & flag) { 3572 spin_lock(&fs_info->super_lock); 3573 features = btrfs_super_incompat_flags(disk_super); 3574 if (features & flag) { 3575 features &= ~flag; 3576 btrfs_set_super_incompat_flags(disk_super, features); 3577 btrfs_info(fs_info, "clearing %llu feature flag", 3578 flag); 3579 } 3580 spin_unlock(&fs_info->super_lock); 3581 } 3582 } 3583 3584 #define btrfs_fs_incompat(fs_info, opt) \ 3585 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3586 3587 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3588 { 3589 struct btrfs_super_block *disk_super; 3590 disk_super = fs_info->super_copy; 3591 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3592 } 3593 3594 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3595 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3596 3597 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3598 u64 flag) 3599 { 3600 struct btrfs_super_block *disk_super; 3601 u64 features; 3602 3603 disk_super = fs_info->super_copy; 3604 features = btrfs_super_compat_ro_flags(disk_super); 3605 if (!(features & flag)) { 3606 spin_lock(&fs_info->super_lock); 3607 features = btrfs_super_compat_ro_flags(disk_super); 3608 if (!(features & flag)) { 3609 features |= flag; 3610 btrfs_set_super_compat_ro_flags(disk_super, features); 3611 btrfs_info(fs_info, "setting %llu ro feature flag", 3612 flag); 3613 } 3614 spin_unlock(&fs_info->super_lock); 3615 } 3616 } 3617 3618 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3619 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3620 3621 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3622 u64 flag) 3623 { 3624 struct btrfs_super_block *disk_super; 3625 u64 features; 3626 3627 disk_super = fs_info->super_copy; 3628 features = btrfs_super_compat_ro_flags(disk_super); 3629 if (features & flag) { 3630 spin_lock(&fs_info->super_lock); 3631 features = btrfs_super_compat_ro_flags(disk_super); 3632 if (features & flag) { 3633 features &= ~flag; 3634 btrfs_set_super_compat_ro_flags(disk_super, features); 3635 btrfs_info(fs_info, "clearing %llu ro feature flag", 3636 flag); 3637 } 3638 spin_unlock(&fs_info->super_lock); 3639 } 3640 } 3641 3642 #define btrfs_fs_compat_ro(fs_info, opt) \ 3643 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3644 3645 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3646 { 3647 struct btrfs_super_block *disk_super; 3648 disk_super = fs_info->super_copy; 3649 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3650 } 3651 3652 /* acl.c */ 3653 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3654 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3655 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3656 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3657 struct inode *inode, struct inode *dir); 3658 #else 3659 #define btrfs_get_acl NULL 3660 #define btrfs_set_acl NULL 3661 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3662 struct inode *inode, struct inode *dir) 3663 { 3664 return 0; 3665 } 3666 #endif 3667 3668 /* relocation.c */ 3669 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3670 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3671 struct btrfs_root *root); 3672 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3673 struct btrfs_root *root); 3674 int btrfs_recover_relocation(struct btrfs_root *root); 3675 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3676 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3677 struct btrfs_root *root, struct extent_buffer *buf, 3678 struct extent_buffer *cow); 3679 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3680 u64 *bytes_to_reserve); 3681 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3682 struct btrfs_pending_snapshot *pending); 3683 3684 /* scrub.c */ 3685 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3686 u64 end, struct btrfs_scrub_progress *progress, 3687 int readonly, int is_dev_replace); 3688 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3689 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3690 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3691 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3692 struct btrfs_device *dev); 3693 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3694 struct btrfs_scrub_progress *progress); 3695 static inline void btrfs_init_full_stripe_locks_tree( 3696 struct btrfs_full_stripe_locks_tree *locks_root) 3697 { 3698 locks_root->root = RB_ROOT; 3699 mutex_init(&locks_root->lock); 3700 } 3701 3702 /* dev-replace.c */ 3703 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3704 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3705 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3706 3707 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3708 { 3709 btrfs_bio_counter_sub(fs_info, 1); 3710 } 3711 3712 /* reada.c */ 3713 struct reada_control { 3714 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3715 struct btrfs_key key_start; 3716 struct btrfs_key key_end; /* exclusive */ 3717 atomic_t elems; 3718 struct kref refcnt; 3719 wait_queue_head_t wait; 3720 }; 3721 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3722 struct btrfs_key *start, struct btrfs_key *end); 3723 int btrfs_reada_wait(void *handle); 3724 void btrfs_reada_detach(void *handle); 3725 int btree_readahead_hook(struct extent_buffer *eb, int err); 3726 3727 static inline int is_fstree(u64 rootid) 3728 { 3729 if (rootid == BTRFS_FS_TREE_OBJECTID || 3730 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3731 !btrfs_qgroup_level(rootid))) 3732 return 1; 3733 return 0; 3734 } 3735 3736 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3737 { 3738 return signal_pending(current); 3739 } 3740 3741 /* Sanity test specific functions */ 3742 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3743 void btrfs_test_destroy_inode(struct inode *inode); 3744 #endif 3745 3746 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3747 { 3748 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3749 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3750 &fs_info->fs_state))) 3751 return 1; 3752 #endif 3753 return 0; 3754 } 3755 #endif 3756