1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #ifndef __BTRFS_CTREE__ 20 #define __BTRFS_CTREE__ 21 22 #include <linux/mm.h> 23 #include <linux/sched/signal.h> 24 #include <linux/highmem.h> 25 #include <linux/fs.h> 26 #include <linux/rwsem.h> 27 #include <linux/semaphore.h> 28 #include <linux/completion.h> 29 #include <linux/backing-dev.h> 30 #include <linux/wait.h> 31 #include <linux/slab.h> 32 #include <linux/kobject.h> 33 #include <trace/events/btrfs.h> 34 #include <asm/kmap_types.h> 35 #include <linux/pagemap.h> 36 #include <linux/btrfs.h> 37 #include <linux/btrfs_tree.h> 38 #include <linux/workqueue.h> 39 #include <linux/security.h> 40 #include <linux/sizes.h> 41 #include <linux/dynamic_debug.h> 42 #include <linux/refcount.h> 43 #include "extent_io.h" 44 #include "extent_map.h" 45 #include "async-thread.h" 46 47 struct btrfs_trans_handle; 48 struct btrfs_transaction; 49 struct btrfs_pending_snapshot; 50 extern struct kmem_cache *btrfs_trans_handle_cachep; 51 extern struct kmem_cache *btrfs_transaction_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_COMPAT_EXTENT_TREE_V0 70 71 /* 72 * the max metadata block size. This limit is somewhat artificial, 73 * but the memmove costs go through the roof for larger blocks. 74 */ 75 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 76 77 /* 78 * we can actually store much bigger names, but lets not confuse the rest 79 * of linux 80 */ 81 #define BTRFS_NAME_LEN 255 82 83 /* 84 * Theoretical limit is larger, but we keep this down to a sane 85 * value. That should limit greatly the possibility of collisions on 86 * inode ref items. 87 */ 88 #define BTRFS_LINK_MAX 65535U 89 90 static const int btrfs_csum_sizes[] = { 4 }; 91 92 /* four bytes for CRC32 */ 93 #define BTRFS_EMPTY_DIR_SIZE 0 94 95 /* ioprio of readahead is set to idle */ 96 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 97 98 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 99 100 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 101 102 /* 103 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 104 */ 105 static inline u32 count_max_extents(u64 size) 106 { 107 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 108 } 109 110 struct btrfs_mapping_tree { 111 struct extent_map_tree map_tree; 112 }; 113 114 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 115 { 116 BUG_ON(num_stripes == 0); 117 return sizeof(struct btrfs_chunk) + 118 sizeof(struct btrfs_stripe) * (num_stripes - 1); 119 } 120 121 /* 122 * File system states 123 */ 124 #define BTRFS_FS_STATE_ERROR 0 125 #define BTRFS_FS_STATE_REMOUNTING 1 126 #define BTRFS_FS_STATE_TRANS_ABORTED 2 127 #define BTRFS_FS_STATE_DEV_REPLACING 3 128 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 129 130 #define BTRFS_BACKREF_REV_MAX 256 131 #define BTRFS_BACKREF_REV_SHIFT 56 132 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 133 BTRFS_BACKREF_REV_SHIFT) 134 135 #define BTRFS_OLD_BACKREF_REV 0 136 #define BTRFS_MIXED_BACKREF_REV 1 137 138 /* 139 * every tree block (leaf or node) starts with this header. 140 */ 141 struct btrfs_header { 142 /* these first four must match the super block */ 143 u8 csum[BTRFS_CSUM_SIZE]; 144 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 145 __le64 bytenr; /* which block this node is supposed to live in */ 146 __le64 flags; 147 148 /* allowed to be different from the super from here on down */ 149 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 150 __le64 generation; 151 __le64 owner; 152 __le32 nritems; 153 u8 level; 154 } __attribute__ ((__packed__)); 155 156 /* 157 * this is a very generous portion of the super block, giving us 158 * room to translate 14 chunks with 3 stripes each. 159 */ 160 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 161 162 /* 163 * just in case we somehow lose the roots and are not able to mount, 164 * we store an array of the roots from previous transactions 165 * in the super. 166 */ 167 #define BTRFS_NUM_BACKUP_ROOTS 4 168 struct btrfs_root_backup { 169 __le64 tree_root; 170 __le64 tree_root_gen; 171 172 __le64 chunk_root; 173 __le64 chunk_root_gen; 174 175 __le64 extent_root; 176 __le64 extent_root_gen; 177 178 __le64 fs_root; 179 __le64 fs_root_gen; 180 181 __le64 dev_root; 182 __le64 dev_root_gen; 183 184 __le64 csum_root; 185 __le64 csum_root_gen; 186 187 __le64 total_bytes; 188 __le64 bytes_used; 189 __le64 num_devices; 190 /* future */ 191 __le64 unused_64[4]; 192 193 u8 tree_root_level; 194 u8 chunk_root_level; 195 u8 extent_root_level; 196 u8 fs_root_level; 197 u8 dev_root_level; 198 u8 csum_root_level; 199 /* future and to align */ 200 u8 unused_8[10]; 201 } __attribute__ ((__packed__)); 202 203 /* 204 * the super block basically lists the main trees of the FS 205 * it currently lacks any block count etc etc 206 */ 207 struct btrfs_super_block { 208 u8 csum[BTRFS_CSUM_SIZE]; 209 /* the first 4 fields must match struct btrfs_header */ 210 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 211 __le64 bytenr; /* this block number */ 212 __le64 flags; 213 214 /* allowed to be different from the btrfs_header from here own down */ 215 __le64 magic; 216 __le64 generation; 217 __le64 root; 218 __le64 chunk_root; 219 __le64 log_root; 220 221 /* this will help find the new super based on the log root */ 222 __le64 log_root_transid; 223 __le64 total_bytes; 224 __le64 bytes_used; 225 __le64 root_dir_objectid; 226 __le64 num_devices; 227 __le32 sectorsize; 228 __le32 nodesize; 229 __le32 __unused_leafsize; 230 __le32 stripesize; 231 __le32 sys_chunk_array_size; 232 __le64 chunk_root_generation; 233 __le64 compat_flags; 234 __le64 compat_ro_flags; 235 __le64 incompat_flags; 236 __le16 csum_type; 237 u8 root_level; 238 u8 chunk_root_level; 239 u8 log_root_level; 240 struct btrfs_dev_item dev_item; 241 242 char label[BTRFS_LABEL_SIZE]; 243 244 __le64 cache_generation; 245 __le64 uuid_tree_generation; 246 247 /* future expansion */ 248 __le64 reserved[30]; 249 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 250 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 251 } __attribute__ ((__packed__)); 252 253 /* 254 * Compat flags that we support. If any incompat flags are set other than the 255 * ones specified below then we will fail to mount 256 */ 257 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 258 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 259 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 260 261 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 262 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 263 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 264 265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 266 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 267 268 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 269 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 270 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 271 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 272 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 273 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 274 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 275 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 276 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 277 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 278 279 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 280 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 281 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 282 283 /* 284 * A leaf is full of items. offset and size tell us where to find 285 * the item in the leaf (relative to the start of the data area) 286 */ 287 struct btrfs_item { 288 struct btrfs_disk_key key; 289 __le32 offset; 290 __le32 size; 291 } __attribute__ ((__packed__)); 292 293 /* 294 * leaves have an item area and a data area: 295 * [item0, item1....itemN] [free space] [dataN...data1, data0] 296 * 297 * The data is separate from the items to get the keys closer together 298 * during searches. 299 */ 300 struct btrfs_leaf { 301 struct btrfs_header header; 302 struct btrfs_item items[]; 303 } __attribute__ ((__packed__)); 304 305 /* 306 * all non-leaf blocks are nodes, they hold only keys and pointers to 307 * other blocks 308 */ 309 struct btrfs_key_ptr { 310 struct btrfs_disk_key key; 311 __le64 blockptr; 312 __le64 generation; 313 } __attribute__ ((__packed__)); 314 315 struct btrfs_node { 316 struct btrfs_header header; 317 struct btrfs_key_ptr ptrs[]; 318 } __attribute__ ((__packed__)); 319 320 /* 321 * btrfs_paths remember the path taken from the root down to the leaf. 322 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 323 * to any other levels that are present. 324 * 325 * The slots array records the index of the item or block pointer 326 * used while walking the tree. 327 */ 328 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 329 struct btrfs_path { 330 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 331 int slots[BTRFS_MAX_LEVEL]; 332 /* if there is real range locking, this locks field will change */ 333 u8 locks[BTRFS_MAX_LEVEL]; 334 u8 reada; 335 /* keep some upper locks as we walk down */ 336 u8 lowest_level; 337 338 /* 339 * set by btrfs_split_item, tells search_slot to keep all locks 340 * and to force calls to keep space in the nodes 341 */ 342 unsigned int search_for_split:1; 343 unsigned int keep_locks:1; 344 unsigned int skip_locking:1; 345 unsigned int leave_spinning:1; 346 unsigned int search_commit_root:1; 347 unsigned int need_commit_sem:1; 348 unsigned int skip_release_on_error:1; 349 }; 350 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 351 sizeof(struct btrfs_item)) 352 struct btrfs_dev_replace { 353 u64 replace_state; /* see #define above */ 354 u64 time_started; /* seconds since 1-Jan-1970 */ 355 u64 time_stopped; /* seconds since 1-Jan-1970 */ 356 atomic64_t num_write_errors; 357 atomic64_t num_uncorrectable_read_errors; 358 359 u64 cursor_left; 360 u64 committed_cursor_left; 361 u64 cursor_left_last_write_of_item; 362 u64 cursor_right; 363 364 u64 cont_reading_from_srcdev_mode; /* see #define above */ 365 366 int is_valid; 367 int item_needs_writeback; 368 struct btrfs_device *srcdev; 369 struct btrfs_device *tgtdev; 370 371 pid_t lock_owner; 372 atomic_t nesting_level; 373 struct mutex lock_finishing_cancel_unmount; 374 rwlock_t lock; 375 atomic_t read_locks; 376 atomic_t blocking_readers; 377 wait_queue_head_t read_lock_wq; 378 379 struct btrfs_scrub_progress scrub_progress; 380 }; 381 382 /* For raid type sysfs entries */ 383 struct raid_kobject { 384 int raid_type; 385 struct kobject kobj; 386 }; 387 388 struct btrfs_space_info { 389 spinlock_t lock; 390 391 u64 total_bytes; /* total bytes in the space, 392 this doesn't take mirrors into account */ 393 u64 bytes_used; /* total bytes used, 394 this doesn't take mirrors into account */ 395 u64 bytes_pinned; /* total bytes pinned, will be freed when the 396 transaction finishes */ 397 u64 bytes_reserved; /* total bytes the allocator has reserved for 398 current allocations */ 399 u64 bytes_may_use; /* number of bytes that may be used for 400 delalloc/allocations */ 401 u64 bytes_readonly; /* total bytes that are read only */ 402 403 u64 max_extent_size; /* This will hold the maximum extent size of 404 the space info if we had an ENOSPC in the 405 allocator. */ 406 407 unsigned int full:1; /* indicates that we cannot allocate any more 408 chunks for this space */ 409 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 410 411 unsigned int flush:1; /* set if we are trying to make space */ 412 413 unsigned int force_alloc; /* set if we need to force a chunk 414 alloc for this space */ 415 416 u64 disk_used; /* total bytes used on disk */ 417 u64 disk_total; /* total bytes on disk, takes mirrors into 418 account */ 419 420 u64 flags; 421 422 /* 423 * bytes_pinned is kept in line with what is actually pinned, as in 424 * we've called update_block_group and dropped the bytes_used counter 425 * and increased the bytes_pinned counter. However this means that 426 * bytes_pinned does not reflect the bytes that will be pinned once the 427 * delayed refs are flushed, so this counter is inc'ed every time we 428 * call btrfs_free_extent so it is a realtime count of what will be 429 * freed once the transaction is committed. It will be zeroed every 430 * time the transaction commits. 431 */ 432 struct percpu_counter total_bytes_pinned; 433 434 struct list_head list; 435 /* Protected by the spinlock 'lock'. */ 436 struct list_head ro_bgs; 437 struct list_head priority_tickets; 438 struct list_head tickets; 439 /* 440 * tickets_id just indicates the next ticket will be handled, so note 441 * it's not stored per ticket. 442 */ 443 u64 tickets_id; 444 445 struct rw_semaphore groups_sem; 446 /* for block groups in our same type */ 447 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 448 wait_queue_head_t wait; 449 450 struct kobject kobj; 451 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 452 }; 453 454 #define BTRFS_BLOCK_RSV_GLOBAL 1 455 #define BTRFS_BLOCK_RSV_DELALLOC 2 456 #define BTRFS_BLOCK_RSV_TRANS 3 457 #define BTRFS_BLOCK_RSV_CHUNK 4 458 #define BTRFS_BLOCK_RSV_DELOPS 5 459 #define BTRFS_BLOCK_RSV_EMPTY 6 460 #define BTRFS_BLOCK_RSV_TEMP 7 461 462 struct btrfs_block_rsv { 463 u64 size; 464 u64 reserved; 465 struct btrfs_space_info *space_info; 466 spinlock_t lock; 467 unsigned short full; 468 unsigned short type; 469 unsigned short failfast; 470 }; 471 472 /* 473 * free clusters are used to claim free space in relatively large chunks, 474 * allowing us to do less seeky writes. They are used for all metadata 475 * allocations and data allocations in ssd mode. 476 */ 477 struct btrfs_free_cluster { 478 spinlock_t lock; 479 spinlock_t refill_lock; 480 struct rb_root root; 481 482 /* largest extent in this cluster */ 483 u64 max_size; 484 485 /* first extent starting offset */ 486 u64 window_start; 487 488 /* We did a full search and couldn't create a cluster */ 489 bool fragmented; 490 491 struct btrfs_block_group_cache *block_group; 492 /* 493 * when a cluster is allocated from a block group, we put the 494 * cluster onto a list in the block group so that it can 495 * be freed before the block group is freed. 496 */ 497 struct list_head block_group_list; 498 }; 499 500 enum btrfs_caching_type { 501 BTRFS_CACHE_NO = 0, 502 BTRFS_CACHE_STARTED = 1, 503 BTRFS_CACHE_FAST = 2, 504 BTRFS_CACHE_FINISHED = 3, 505 BTRFS_CACHE_ERROR = 4, 506 }; 507 508 enum btrfs_disk_cache_state { 509 BTRFS_DC_WRITTEN = 0, 510 BTRFS_DC_ERROR = 1, 511 BTRFS_DC_CLEAR = 2, 512 BTRFS_DC_SETUP = 3, 513 }; 514 515 struct btrfs_caching_control { 516 struct list_head list; 517 struct mutex mutex; 518 wait_queue_head_t wait; 519 struct btrfs_work work; 520 struct btrfs_block_group_cache *block_group; 521 u64 progress; 522 refcount_t count; 523 }; 524 525 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 526 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2) 527 528 struct btrfs_io_ctl { 529 void *cur, *orig; 530 struct page *page; 531 struct page **pages; 532 struct btrfs_fs_info *fs_info; 533 struct inode *inode; 534 unsigned long size; 535 int index; 536 int num_pages; 537 int entries; 538 int bitmaps; 539 unsigned check_crcs:1; 540 }; 541 542 /* 543 * Tree to record all locked full stripes of a RAID5/6 block group 544 */ 545 struct btrfs_full_stripe_locks_tree { 546 struct rb_root root; 547 struct mutex lock; 548 }; 549 550 struct btrfs_block_group_cache { 551 struct btrfs_key key; 552 struct btrfs_block_group_item item; 553 struct btrfs_fs_info *fs_info; 554 struct inode *inode; 555 spinlock_t lock; 556 u64 pinned; 557 u64 reserved; 558 u64 delalloc_bytes; 559 u64 bytes_super; 560 u64 flags; 561 u64 cache_generation; 562 u32 sectorsize; 563 564 /* 565 * If the free space extent count exceeds this number, convert the block 566 * group to bitmaps. 567 */ 568 u32 bitmap_high_thresh; 569 570 /* 571 * If the free space extent count drops below this number, convert the 572 * block group back to extents. 573 */ 574 u32 bitmap_low_thresh; 575 576 /* 577 * It is just used for the delayed data space allocation because 578 * only the data space allocation and the relative metadata update 579 * can be done cross the transaction. 580 */ 581 struct rw_semaphore data_rwsem; 582 583 /* for raid56, this is a full stripe, without parity */ 584 unsigned long full_stripe_len; 585 586 unsigned int ro; 587 unsigned int iref:1; 588 unsigned int has_caching_ctl:1; 589 unsigned int removed:1; 590 591 int disk_cache_state; 592 593 /* cache tracking stuff */ 594 int cached; 595 struct btrfs_caching_control *caching_ctl; 596 u64 last_byte_to_unpin; 597 598 struct btrfs_space_info *space_info; 599 600 /* free space cache stuff */ 601 struct btrfs_free_space_ctl *free_space_ctl; 602 603 /* block group cache stuff */ 604 struct rb_node cache_node; 605 606 /* for block groups in the same raid type */ 607 struct list_head list; 608 609 /* usage count */ 610 atomic_t count; 611 612 /* List of struct btrfs_free_clusters for this block group. 613 * Today it will only have one thing on it, but that may change 614 */ 615 struct list_head cluster_list; 616 617 /* For delayed block group creation or deletion of empty block groups */ 618 struct list_head bg_list; 619 620 /* For read-only block groups */ 621 struct list_head ro_list; 622 623 atomic_t trimming; 624 625 /* For dirty block groups */ 626 struct list_head dirty_list; 627 struct list_head io_list; 628 629 struct btrfs_io_ctl io_ctl; 630 631 /* 632 * Incremented when doing extent allocations and holding a read lock 633 * on the space_info's groups_sem semaphore. 634 * Decremented when an ordered extent that represents an IO against this 635 * block group's range is created (after it's added to its inode's 636 * root's list of ordered extents) or immediately after the allocation 637 * if it's a metadata extent or fallocate extent (for these cases we 638 * don't create ordered extents). 639 */ 640 atomic_t reservations; 641 642 /* 643 * Incremented while holding the spinlock *lock* by a task checking if 644 * it can perform a nocow write (incremented if the value for the *ro* 645 * field is 0). Decremented by such tasks once they create an ordered 646 * extent or before that if some error happens before reaching that step. 647 * This is to prevent races between block group relocation and nocow 648 * writes through direct IO. 649 */ 650 atomic_t nocow_writers; 651 652 /* Lock for free space tree operations. */ 653 struct mutex free_space_lock; 654 655 /* 656 * Does the block group need to be added to the free space tree? 657 * Protected by free_space_lock. 658 */ 659 int needs_free_space; 660 661 /* Record locked full stripes for RAID5/6 block group */ 662 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 663 }; 664 665 /* delayed seq elem */ 666 struct seq_list { 667 struct list_head list; 668 u64 seq; 669 }; 670 671 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 672 673 #define SEQ_LAST ((u64)-1) 674 675 enum btrfs_orphan_cleanup_state { 676 ORPHAN_CLEANUP_STARTED = 1, 677 ORPHAN_CLEANUP_DONE = 2, 678 }; 679 680 /* used by the raid56 code to lock stripes for read/modify/write */ 681 struct btrfs_stripe_hash { 682 struct list_head hash_list; 683 wait_queue_head_t wait; 684 spinlock_t lock; 685 }; 686 687 /* used by the raid56 code to lock stripes for read/modify/write */ 688 struct btrfs_stripe_hash_table { 689 struct list_head stripe_cache; 690 spinlock_t cache_lock; 691 int cache_size; 692 struct btrfs_stripe_hash table[]; 693 }; 694 695 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 696 697 void btrfs_init_async_reclaim_work(struct work_struct *work); 698 699 /* fs_info */ 700 struct reloc_control; 701 struct btrfs_device; 702 struct btrfs_fs_devices; 703 struct btrfs_balance_control; 704 struct btrfs_delayed_root; 705 706 #define BTRFS_FS_BARRIER 1 707 #define BTRFS_FS_CLOSING_START 2 708 #define BTRFS_FS_CLOSING_DONE 3 709 #define BTRFS_FS_LOG_RECOVERING 4 710 #define BTRFS_FS_OPEN 5 711 #define BTRFS_FS_QUOTA_ENABLED 6 712 #define BTRFS_FS_QUOTA_ENABLING 7 713 #define BTRFS_FS_QUOTA_DISABLING 8 714 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 715 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 716 #define BTRFS_FS_BTREE_ERR 11 717 #define BTRFS_FS_LOG1_ERR 12 718 #define BTRFS_FS_LOG2_ERR 13 719 /* 720 * Indicate that a whole-filesystem exclusive operation is running 721 * (device replace, resize, device add/delete, balance) 722 */ 723 #define BTRFS_FS_EXCL_OP 14 724 725 struct btrfs_fs_info { 726 u8 fsid[BTRFS_FSID_SIZE]; 727 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 728 unsigned long flags; 729 struct btrfs_root *extent_root; 730 struct btrfs_root *tree_root; 731 struct btrfs_root *chunk_root; 732 struct btrfs_root *dev_root; 733 struct btrfs_root *fs_root; 734 struct btrfs_root *csum_root; 735 struct btrfs_root *quota_root; 736 struct btrfs_root *uuid_root; 737 struct btrfs_root *free_space_root; 738 739 /* the log root tree is a directory of all the other log roots */ 740 struct btrfs_root *log_root_tree; 741 742 spinlock_t fs_roots_radix_lock; 743 struct radix_tree_root fs_roots_radix; 744 745 /* block group cache stuff */ 746 spinlock_t block_group_cache_lock; 747 u64 first_logical_byte; 748 struct rb_root block_group_cache_tree; 749 750 /* keep track of unallocated space */ 751 spinlock_t free_chunk_lock; 752 u64 free_chunk_space; 753 754 struct extent_io_tree freed_extents[2]; 755 struct extent_io_tree *pinned_extents; 756 757 /* logical->physical extent mapping */ 758 struct btrfs_mapping_tree mapping_tree; 759 760 /* 761 * block reservation for extent, checksum, root tree and 762 * delayed dir index item 763 */ 764 struct btrfs_block_rsv global_block_rsv; 765 /* block reservation for delay allocation */ 766 struct btrfs_block_rsv delalloc_block_rsv; 767 /* block reservation for metadata operations */ 768 struct btrfs_block_rsv trans_block_rsv; 769 /* block reservation for chunk tree */ 770 struct btrfs_block_rsv chunk_block_rsv; 771 /* block reservation for delayed operations */ 772 struct btrfs_block_rsv delayed_block_rsv; 773 774 struct btrfs_block_rsv empty_block_rsv; 775 776 u64 generation; 777 u64 last_trans_committed; 778 u64 avg_delayed_ref_runtime; 779 780 /* 781 * this is updated to the current trans every time a full commit 782 * is required instead of the faster short fsync log commits 783 */ 784 u64 last_trans_log_full_commit; 785 unsigned long mount_opt; 786 /* 787 * Track requests for actions that need to be done during transaction 788 * commit (like for some mount options). 789 */ 790 unsigned long pending_changes; 791 unsigned long compress_type:4; 792 int commit_interval; 793 /* 794 * It is a suggestive number, the read side is safe even it gets a 795 * wrong number because we will write out the data into a regular 796 * extent. The write side(mount/remount) is under ->s_umount lock, 797 * so it is also safe. 798 */ 799 u64 max_inline; 800 /* 801 * Protected by ->chunk_mutex and sb->s_umount. 802 * 803 * The reason that we use two lock to protect it is because only 804 * remount and mount operations can change it and these two operations 805 * are under sb->s_umount, but the read side (chunk allocation) can not 806 * acquire sb->s_umount or the deadlock would happen. So we use two 807 * locks to protect it. On the write side, we must acquire two locks, 808 * and on the read side, we just need acquire one of them. 809 */ 810 u64 alloc_start; 811 struct btrfs_transaction *running_transaction; 812 wait_queue_head_t transaction_throttle; 813 wait_queue_head_t transaction_wait; 814 wait_queue_head_t transaction_blocked_wait; 815 wait_queue_head_t async_submit_wait; 816 817 /* 818 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 819 * when they are updated. 820 * 821 * Because we do not clear the flags for ever, so we needn't use 822 * the lock on the read side. 823 * 824 * We also needn't use the lock when we mount the fs, because 825 * there is no other task which will update the flag. 826 */ 827 spinlock_t super_lock; 828 struct btrfs_super_block *super_copy; 829 struct btrfs_super_block *super_for_commit; 830 struct super_block *sb; 831 struct inode *btree_inode; 832 struct mutex tree_log_mutex; 833 struct mutex transaction_kthread_mutex; 834 struct mutex cleaner_mutex; 835 struct mutex chunk_mutex; 836 struct mutex volume_mutex; 837 838 /* 839 * this is taken to make sure we don't set block groups ro after 840 * the free space cache has been allocated on them 841 */ 842 struct mutex ro_block_group_mutex; 843 844 /* this is used during read/modify/write to make sure 845 * no two ios are trying to mod the same stripe at the same 846 * time 847 */ 848 struct btrfs_stripe_hash_table *stripe_hash_table; 849 850 /* 851 * this protects the ordered operations list only while we are 852 * processing all of the entries on it. This way we make 853 * sure the commit code doesn't find the list temporarily empty 854 * because another function happens to be doing non-waiting preflush 855 * before jumping into the main commit. 856 */ 857 struct mutex ordered_operations_mutex; 858 859 struct rw_semaphore commit_root_sem; 860 861 struct rw_semaphore cleanup_work_sem; 862 863 struct rw_semaphore subvol_sem; 864 struct srcu_struct subvol_srcu; 865 866 spinlock_t trans_lock; 867 /* 868 * the reloc mutex goes with the trans lock, it is taken 869 * during commit to protect us from the relocation code 870 */ 871 struct mutex reloc_mutex; 872 873 struct list_head trans_list; 874 struct list_head dead_roots; 875 struct list_head caching_block_groups; 876 877 spinlock_t delayed_iput_lock; 878 struct list_head delayed_iputs; 879 struct mutex cleaner_delayed_iput_mutex; 880 881 /* this protects tree_mod_seq_list */ 882 spinlock_t tree_mod_seq_lock; 883 atomic64_t tree_mod_seq; 884 struct list_head tree_mod_seq_list; 885 886 /* this protects tree_mod_log */ 887 rwlock_t tree_mod_log_lock; 888 struct rb_root tree_mod_log; 889 890 atomic_t nr_async_submits; 891 atomic_t async_submit_draining; 892 atomic_t nr_async_bios; 893 atomic_t async_delalloc_pages; 894 atomic_t open_ioctl_trans; 895 896 /* 897 * this is used to protect the following list -- ordered_roots. 898 */ 899 spinlock_t ordered_root_lock; 900 901 /* 902 * all fs/file tree roots in which there are data=ordered extents 903 * pending writeback are added into this list. 904 * 905 * these can span multiple transactions and basically include 906 * every dirty data page that isn't from nodatacow 907 */ 908 struct list_head ordered_roots; 909 910 struct mutex delalloc_root_mutex; 911 spinlock_t delalloc_root_lock; 912 /* all fs/file tree roots that have delalloc inodes. */ 913 struct list_head delalloc_roots; 914 915 /* 916 * there is a pool of worker threads for checksumming during writes 917 * and a pool for checksumming after reads. This is because readers 918 * can run with FS locks held, and the writers may be waiting for 919 * those locks. We don't want ordering in the pending list to cause 920 * deadlocks, and so the two are serviced separately. 921 * 922 * A third pool does submit_bio to avoid deadlocking with the other 923 * two 924 */ 925 struct btrfs_workqueue *workers; 926 struct btrfs_workqueue *delalloc_workers; 927 struct btrfs_workqueue *flush_workers; 928 struct btrfs_workqueue *endio_workers; 929 struct btrfs_workqueue *endio_meta_workers; 930 struct btrfs_workqueue *endio_raid56_workers; 931 struct btrfs_workqueue *endio_repair_workers; 932 struct btrfs_workqueue *rmw_workers; 933 struct btrfs_workqueue *endio_meta_write_workers; 934 struct btrfs_workqueue *endio_write_workers; 935 struct btrfs_workqueue *endio_freespace_worker; 936 struct btrfs_workqueue *submit_workers; 937 struct btrfs_workqueue *caching_workers; 938 struct btrfs_workqueue *readahead_workers; 939 940 /* 941 * fixup workers take dirty pages that didn't properly go through 942 * the cow mechanism and make them safe to write. It happens 943 * for the sys_munmap function call path 944 */ 945 struct btrfs_workqueue *fixup_workers; 946 struct btrfs_workqueue *delayed_workers; 947 948 /* the extent workers do delayed refs on the extent allocation tree */ 949 struct btrfs_workqueue *extent_workers; 950 struct task_struct *transaction_kthread; 951 struct task_struct *cleaner_kthread; 952 int thread_pool_size; 953 954 struct kobject *space_info_kobj; 955 956 u64 total_pinned; 957 958 /* used to keep from writing metadata until there is a nice batch */ 959 struct percpu_counter dirty_metadata_bytes; 960 struct percpu_counter delalloc_bytes; 961 s32 dirty_metadata_batch; 962 s32 delalloc_batch; 963 964 struct list_head dirty_cowonly_roots; 965 966 struct btrfs_fs_devices *fs_devices; 967 968 /* 969 * the space_info list is almost entirely read only. It only changes 970 * when we add a new raid type to the FS, and that happens 971 * very rarely. RCU is used to protect it. 972 */ 973 struct list_head space_info; 974 975 struct btrfs_space_info *data_sinfo; 976 977 struct reloc_control *reloc_ctl; 978 979 /* data_alloc_cluster is only used in ssd mode */ 980 struct btrfs_free_cluster data_alloc_cluster; 981 982 /* all metadata allocations go through this cluster */ 983 struct btrfs_free_cluster meta_alloc_cluster; 984 985 /* auto defrag inodes go here */ 986 spinlock_t defrag_inodes_lock; 987 struct rb_root defrag_inodes; 988 atomic_t defrag_running; 989 990 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 991 seqlock_t profiles_lock; 992 /* 993 * these three are in extended format (availability of single 994 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 995 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 996 */ 997 u64 avail_data_alloc_bits; 998 u64 avail_metadata_alloc_bits; 999 u64 avail_system_alloc_bits; 1000 1001 /* restriper state */ 1002 spinlock_t balance_lock; 1003 struct mutex balance_mutex; 1004 atomic_t balance_running; 1005 atomic_t balance_pause_req; 1006 atomic_t balance_cancel_req; 1007 struct btrfs_balance_control *balance_ctl; 1008 wait_queue_head_t balance_wait_q; 1009 1010 unsigned data_chunk_allocations; 1011 unsigned metadata_ratio; 1012 1013 void *bdev_holder; 1014 1015 /* private scrub information */ 1016 struct mutex scrub_lock; 1017 atomic_t scrubs_running; 1018 atomic_t scrub_pause_req; 1019 atomic_t scrubs_paused; 1020 atomic_t scrub_cancel_req; 1021 wait_queue_head_t scrub_pause_wait; 1022 int scrub_workers_refcnt; 1023 struct btrfs_workqueue *scrub_workers; 1024 struct btrfs_workqueue *scrub_wr_completion_workers; 1025 struct btrfs_workqueue *scrub_nocow_workers; 1026 struct btrfs_workqueue *scrub_parity_workers; 1027 1028 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1029 u32 check_integrity_print_mask; 1030 #endif 1031 /* is qgroup tracking in a consistent state? */ 1032 u64 qgroup_flags; 1033 1034 /* holds configuration and tracking. Protected by qgroup_lock */ 1035 struct rb_root qgroup_tree; 1036 struct rb_root qgroup_op_tree; 1037 spinlock_t qgroup_lock; 1038 spinlock_t qgroup_op_lock; 1039 atomic_t qgroup_op_seq; 1040 1041 /* 1042 * used to avoid frequently calling ulist_alloc()/ulist_free() 1043 * when doing qgroup accounting, it must be protected by qgroup_lock. 1044 */ 1045 struct ulist *qgroup_ulist; 1046 1047 /* protect user change for quota operations */ 1048 struct mutex qgroup_ioctl_lock; 1049 1050 /* list of dirty qgroups to be written at next commit */ 1051 struct list_head dirty_qgroups; 1052 1053 /* used by qgroup for an efficient tree traversal */ 1054 u64 qgroup_seq; 1055 1056 /* qgroup rescan items */ 1057 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1058 struct btrfs_key qgroup_rescan_progress; 1059 struct btrfs_workqueue *qgroup_rescan_workers; 1060 struct completion qgroup_rescan_completion; 1061 struct btrfs_work qgroup_rescan_work; 1062 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1063 1064 /* filesystem state */ 1065 unsigned long fs_state; 1066 1067 struct btrfs_delayed_root *delayed_root; 1068 1069 /* readahead tree */ 1070 spinlock_t reada_lock; 1071 struct radix_tree_root reada_tree; 1072 1073 /* readahead works cnt */ 1074 atomic_t reada_works_cnt; 1075 1076 /* Extent buffer radix tree */ 1077 spinlock_t buffer_lock; 1078 struct radix_tree_root buffer_radix; 1079 1080 /* next backup root to be overwritten */ 1081 int backup_root_index; 1082 1083 int num_tolerated_disk_barrier_failures; 1084 1085 /* device replace state */ 1086 struct btrfs_dev_replace dev_replace; 1087 1088 struct percpu_counter bio_counter; 1089 wait_queue_head_t replace_wait; 1090 1091 struct semaphore uuid_tree_rescan_sem; 1092 1093 /* Used to reclaim the metadata space in the background. */ 1094 struct work_struct async_reclaim_work; 1095 1096 spinlock_t unused_bgs_lock; 1097 struct list_head unused_bgs; 1098 struct mutex unused_bg_unpin_mutex; 1099 struct mutex delete_unused_bgs_mutex; 1100 1101 /* For btrfs to record security options */ 1102 struct security_mnt_opts security_opts; 1103 1104 /* 1105 * Chunks that can't be freed yet (under a trim/discard operation) 1106 * and will be latter freed. Protected by fs_info->chunk_mutex. 1107 */ 1108 struct list_head pinned_chunks; 1109 1110 /* Used to record internally whether fs has been frozen */ 1111 int fs_frozen; 1112 1113 /* Cached block sizes */ 1114 u32 nodesize; 1115 u32 sectorsize; 1116 u32 stripesize; 1117 }; 1118 1119 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1120 { 1121 return sb->s_fs_info; 1122 } 1123 1124 struct btrfs_subvolume_writers { 1125 struct percpu_counter counter; 1126 wait_queue_head_t wait; 1127 }; 1128 1129 /* 1130 * The state of btrfs root 1131 */ 1132 /* 1133 * btrfs_record_root_in_trans is a multi-step process, 1134 * and it can race with the balancing code. But the 1135 * race is very small, and only the first time the root 1136 * is added to each transaction. So IN_TRANS_SETUP 1137 * is used to tell us when more checks are required 1138 */ 1139 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1140 #define BTRFS_ROOT_REF_COWS 1 1141 #define BTRFS_ROOT_TRACK_DIRTY 2 1142 #define BTRFS_ROOT_IN_RADIX 3 1143 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1144 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1145 #define BTRFS_ROOT_FORCE_COW 6 1146 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1147 #define BTRFS_ROOT_DIRTY 8 1148 1149 /* 1150 * in ram representation of the tree. extent_root is used for all allocations 1151 * and for the extent tree extent_root root. 1152 */ 1153 struct btrfs_root { 1154 struct extent_buffer *node; 1155 1156 struct extent_buffer *commit_root; 1157 struct btrfs_root *log_root; 1158 struct btrfs_root *reloc_root; 1159 1160 unsigned long state; 1161 struct btrfs_root_item root_item; 1162 struct btrfs_key root_key; 1163 struct btrfs_fs_info *fs_info; 1164 struct extent_io_tree dirty_log_pages; 1165 1166 struct mutex objectid_mutex; 1167 1168 spinlock_t accounting_lock; 1169 struct btrfs_block_rsv *block_rsv; 1170 1171 /* free ino cache stuff */ 1172 struct btrfs_free_space_ctl *free_ino_ctl; 1173 enum btrfs_caching_type ino_cache_state; 1174 spinlock_t ino_cache_lock; 1175 wait_queue_head_t ino_cache_wait; 1176 struct btrfs_free_space_ctl *free_ino_pinned; 1177 u64 ino_cache_progress; 1178 struct inode *ino_cache_inode; 1179 1180 struct mutex log_mutex; 1181 wait_queue_head_t log_writer_wait; 1182 wait_queue_head_t log_commit_wait[2]; 1183 struct list_head log_ctxs[2]; 1184 atomic_t log_writers; 1185 atomic_t log_commit[2]; 1186 atomic_t log_batch; 1187 int log_transid; 1188 /* No matter the commit succeeds or not*/ 1189 int log_transid_committed; 1190 /* Just be updated when the commit succeeds. */ 1191 int last_log_commit; 1192 pid_t log_start_pid; 1193 1194 u64 objectid; 1195 u64 last_trans; 1196 1197 u32 type; 1198 1199 u64 highest_objectid; 1200 1201 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1202 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1203 u64 alloc_bytenr; 1204 #endif 1205 1206 u64 defrag_trans_start; 1207 struct btrfs_key defrag_progress; 1208 struct btrfs_key defrag_max; 1209 char *name; 1210 1211 /* the dirty list is only used by non-reference counted roots */ 1212 struct list_head dirty_list; 1213 1214 struct list_head root_list; 1215 1216 spinlock_t log_extents_lock[2]; 1217 struct list_head logged_list[2]; 1218 1219 spinlock_t orphan_lock; 1220 atomic_t orphan_inodes; 1221 struct btrfs_block_rsv *orphan_block_rsv; 1222 int orphan_cleanup_state; 1223 1224 spinlock_t inode_lock; 1225 /* red-black tree that keeps track of in-memory inodes */ 1226 struct rb_root inode_tree; 1227 1228 /* 1229 * radix tree that keeps track of delayed nodes of every inode, 1230 * protected by inode_lock 1231 */ 1232 struct radix_tree_root delayed_nodes_tree; 1233 /* 1234 * right now this just gets used so that a root has its own devid 1235 * for stat. It may be used for more later 1236 */ 1237 dev_t anon_dev; 1238 1239 spinlock_t root_item_lock; 1240 refcount_t refs; 1241 1242 struct mutex delalloc_mutex; 1243 spinlock_t delalloc_lock; 1244 /* 1245 * all of the inodes that have delalloc bytes. It is possible for 1246 * this list to be empty even when there is still dirty data=ordered 1247 * extents waiting to finish IO. 1248 */ 1249 struct list_head delalloc_inodes; 1250 struct list_head delalloc_root; 1251 u64 nr_delalloc_inodes; 1252 1253 struct mutex ordered_extent_mutex; 1254 /* 1255 * this is used by the balancing code to wait for all the pending 1256 * ordered extents 1257 */ 1258 spinlock_t ordered_extent_lock; 1259 1260 /* 1261 * all of the data=ordered extents pending writeback 1262 * these can span multiple transactions and basically include 1263 * every dirty data page that isn't from nodatacow 1264 */ 1265 struct list_head ordered_extents; 1266 struct list_head ordered_root; 1267 u64 nr_ordered_extents; 1268 1269 /* 1270 * Number of currently running SEND ioctls to prevent 1271 * manipulation with the read-only status via SUBVOL_SETFLAGS 1272 */ 1273 int send_in_progress; 1274 struct btrfs_subvolume_writers *subv_writers; 1275 atomic_t will_be_snapshoted; 1276 1277 /* For qgroup metadata space reserve */ 1278 atomic64_t qgroup_meta_rsv; 1279 }; 1280 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1281 { 1282 return btrfs_sb(inode->i_sb)->sectorsize; 1283 } 1284 1285 static inline u32 __BTRFS_LEAF_DATA_SIZE(u32 blocksize) 1286 { 1287 return blocksize - sizeof(struct btrfs_header); 1288 } 1289 1290 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1291 { 1292 return __BTRFS_LEAF_DATA_SIZE(info->nodesize); 1293 } 1294 1295 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1296 { 1297 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1298 } 1299 1300 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1301 { 1302 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1303 } 1304 1305 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1306 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1307 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1308 { 1309 return BTRFS_MAX_ITEM_SIZE(info) - 1310 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1311 } 1312 1313 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1314 { 1315 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1316 } 1317 1318 /* 1319 * Flags for mount options. 1320 * 1321 * Note: don't forget to add new options to btrfs_show_options() 1322 */ 1323 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1324 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1325 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1326 #define BTRFS_MOUNT_SSD (1 << 3) 1327 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1328 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1329 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1330 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1331 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1332 #define BTRFS_MOUNT_NOSSD (1 << 9) 1333 #define BTRFS_MOUNT_DISCARD (1 << 10) 1334 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1335 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1336 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1337 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1338 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1339 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1340 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1341 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1342 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1343 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1344 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1345 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1346 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1347 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1348 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1349 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1350 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1351 1352 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1353 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1354 1355 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1356 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1357 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1358 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1359 BTRFS_MOUNT_##opt) 1360 1361 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1362 { \ 1363 if (!btrfs_test_opt(fs_info, opt)) \ 1364 btrfs_info(fs_info, fmt, ##args); \ 1365 btrfs_set_opt(fs_info->mount_opt, opt); \ 1366 } 1367 1368 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1369 { \ 1370 if (btrfs_test_opt(fs_info, opt)) \ 1371 btrfs_info(fs_info, fmt, ##args); \ 1372 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1373 } 1374 1375 #ifdef CONFIG_BTRFS_DEBUG 1376 static inline int 1377 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1378 { 1379 struct btrfs_fs_info *fs_info = block_group->fs_info; 1380 1381 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1382 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1383 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1384 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1385 } 1386 #endif 1387 1388 /* 1389 * Requests for changes that need to be done during transaction commit. 1390 * 1391 * Internal mount options that are used for special handling of the real 1392 * mount options (eg. cannot be set during remount and have to be set during 1393 * transaction commit) 1394 */ 1395 1396 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1397 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1398 #define BTRFS_PENDING_COMMIT (2) 1399 1400 #define btrfs_test_pending(info, opt) \ 1401 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1402 #define btrfs_set_pending(info, opt) \ 1403 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1404 #define btrfs_clear_pending(info, opt) \ 1405 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1406 1407 /* 1408 * Helpers for setting pending mount option changes. 1409 * 1410 * Expects corresponding macros 1411 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1412 */ 1413 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1414 do { \ 1415 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1416 btrfs_info((info), fmt, ##args); \ 1417 btrfs_set_pending((info), SET_##opt); \ 1418 btrfs_clear_pending((info), CLEAR_##opt); \ 1419 } \ 1420 } while(0) 1421 1422 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1423 do { \ 1424 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1425 btrfs_info((info), fmt, ##args); \ 1426 btrfs_set_pending((info), CLEAR_##opt); \ 1427 btrfs_clear_pending((info), SET_##opt); \ 1428 } \ 1429 } while(0) 1430 1431 /* 1432 * Inode flags 1433 */ 1434 #define BTRFS_INODE_NODATASUM (1 << 0) 1435 #define BTRFS_INODE_NODATACOW (1 << 1) 1436 #define BTRFS_INODE_READONLY (1 << 2) 1437 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1438 #define BTRFS_INODE_PREALLOC (1 << 4) 1439 #define BTRFS_INODE_SYNC (1 << 5) 1440 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1441 #define BTRFS_INODE_APPEND (1 << 7) 1442 #define BTRFS_INODE_NODUMP (1 << 8) 1443 #define BTRFS_INODE_NOATIME (1 << 9) 1444 #define BTRFS_INODE_DIRSYNC (1 << 10) 1445 #define BTRFS_INODE_COMPRESS (1 << 11) 1446 1447 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1448 1449 struct btrfs_map_token { 1450 struct extent_buffer *eb; 1451 char *kaddr; 1452 unsigned long offset; 1453 }; 1454 1455 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1456 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1457 1458 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1459 { 1460 token->kaddr = NULL; 1461 } 1462 1463 /* some macros to generate set/get functions for the struct fields. This 1464 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1465 * one for u8: 1466 */ 1467 #define le8_to_cpu(v) (v) 1468 #define cpu_to_le8(v) (v) 1469 #define __le8 u8 1470 1471 #define read_eb_member(eb, ptr, type, member, result) (\ 1472 read_extent_buffer(eb, (char *)(result), \ 1473 ((unsigned long)(ptr)) + \ 1474 offsetof(type, member), \ 1475 sizeof(((type *)0)->member))) 1476 1477 #define write_eb_member(eb, ptr, type, member, result) (\ 1478 write_extent_buffer(eb, (char *)(result), \ 1479 ((unsigned long)(ptr)) + \ 1480 offsetof(type, member), \ 1481 sizeof(((type *)0)->member))) 1482 1483 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1484 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ 1485 unsigned long off, \ 1486 struct btrfs_map_token *token); \ 1487 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ 1488 unsigned long off, u##bits val, \ 1489 struct btrfs_map_token *token); \ 1490 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ 1491 unsigned long off) \ 1492 { \ 1493 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1494 } \ 1495 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1496 unsigned long off, u##bits val) \ 1497 { \ 1498 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1499 } 1500 1501 DECLARE_BTRFS_SETGET_BITS(8) 1502 DECLARE_BTRFS_SETGET_BITS(16) 1503 DECLARE_BTRFS_SETGET_BITS(32) 1504 DECLARE_BTRFS_SETGET_BITS(64) 1505 1506 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1507 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ 1508 { \ 1509 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1510 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1511 } \ 1512 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1513 u##bits val) \ 1514 { \ 1515 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1516 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1517 } \ 1518 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, 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(struct extent_buffer *eb) \ 1534 { \ 1535 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(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 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1557 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); 1558 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1559 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1560 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1561 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1562 start_offset, 64); 1563 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1564 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1565 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1566 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1567 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1568 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1569 1570 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1571 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1572 total_bytes, 64); 1573 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1574 bytes_used, 64); 1575 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1576 io_align, 32); 1577 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1578 io_width, 32); 1579 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1580 sector_size, 32); 1581 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1582 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1583 dev_group, 32); 1584 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1585 seek_speed, 8); 1586 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1587 bandwidth, 8); 1588 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1589 generation, 64); 1590 1591 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1592 { 1593 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1594 } 1595 1596 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1597 { 1598 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1599 } 1600 1601 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1602 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1603 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1604 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1605 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1606 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1607 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1608 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1609 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1610 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1611 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1612 1613 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1614 { 1615 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1616 } 1617 1618 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1619 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1620 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1621 stripe_len, 64); 1622 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1623 io_align, 32); 1624 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1625 io_width, 32); 1626 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1627 sector_size, 32); 1628 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1629 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1630 num_stripes, 16); 1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1632 sub_stripes, 16); 1633 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1634 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1635 1636 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1637 int nr) 1638 { 1639 unsigned long offset = (unsigned long)c; 1640 offset += offsetof(struct btrfs_chunk, stripe); 1641 offset += nr * sizeof(struct btrfs_stripe); 1642 return (struct btrfs_stripe *)offset; 1643 } 1644 1645 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1646 { 1647 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1648 } 1649 1650 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1651 struct btrfs_chunk *c, int nr) 1652 { 1653 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1654 } 1655 1656 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1657 struct btrfs_chunk *c, int nr) 1658 { 1659 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1660 } 1661 1662 /* struct btrfs_block_group_item */ 1663 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1664 used, 64); 1665 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1666 used, 64); 1667 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1668 struct btrfs_block_group_item, chunk_objectid, 64); 1669 1670 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1671 struct btrfs_block_group_item, chunk_objectid, 64); 1672 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1673 struct btrfs_block_group_item, flags, 64); 1674 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1675 struct btrfs_block_group_item, flags, 64); 1676 1677 /* struct btrfs_free_space_info */ 1678 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1679 extent_count, 32); 1680 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1681 1682 /* struct btrfs_inode_ref */ 1683 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1684 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1685 1686 /* struct btrfs_inode_extref */ 1687 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1688 parent_objectid, 64); 1689 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1690 name_len, 16); 1691 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1692 1693 /* struct btrfs_inode_item */ 1694 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1695 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1696 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1697 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1698 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1699 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1700 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1701 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1702 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1703 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1704 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1705 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1706 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1707 generation, 64); 1708 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1709 sequence, 64); 1710 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1711 transid, 64); 1712 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1713 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1714 nbytes, 64); 1715 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1716 block_group, 64); 1717 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1718 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1719 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1721 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1723 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1724 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1725 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1726 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1727 1728 /* struct btrfs_dev_extent */ 1729 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1730 chunk_tree, 64); 1731 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1732 chunk_objectid, 64); 1733 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1734 chunk_offset, 64); 1735 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1736 1737 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1738 { 1739 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1740 return (unsigned long)dev + ptr; 1741 } 1742 1743 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1744 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1745 generation, 64); 1746 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1747 1748 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1749 1750 1751 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1752 1753 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1754 struct btrfs_tree_block_info *item, 1755 struct btrfs_disk_key *key) 1756 { 1757 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1758 } 1759 1760 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1761 struct btrfs_tree_block_info *item, 1762 struct btrfs_disk_key *key) 1763 { 1764 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1765 } 1766 1767 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1768 root, 64); 1769 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1770 objectid, 64); 1771 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1772 offset, 64); 1773 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1774 count, 32); 1775 1776 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1777 count, 32); 1778 1779 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1780 type, 8); 1781 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1782 offset, 64); 1783 1784 static inline u32 btrfs_extent_inline_ref_size(int type) 1785 { 1786 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1787 type == BTRFS_SHARED_BLOCK_REF_KEY) 1788 return sizeof(struct btrfs_extent_inline_ref); 1789 if (type == BTRFS_SHARED_DATA_REF_KEY) 1790 return sizeof(struct btrfs_shared_data_ref) + 1791 sizeof(struct btrfs_extent_inline_ref); 1792 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1793 return sizeof(struct btrfs_extent_data_ref) + 1794 offsetof(struct btrfs_extent_inline_ref, offset); 1795 BUG(); 1796 return 0; 1797 } 1798 1799 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1800 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1801 generation, 64); 1802 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1803 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1804 1805 /* struct btrfs_node */ 1806 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1807 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1808 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1809 blockptr, 64); 1810 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1811 generation, 64); 1812 1813 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1814 { 1815 unsigned long ptr; 1816 ptr = offsetof(struct btrfs_node, ptrs) + 1817 sizeof(struct btrfs_key_ptr) * nr; 1818 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1819 } 1820 1821 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1822 int nr, u64 val) 1823 { 1824 unsigned long ptr; 1825 ptr = offsetof(struct btrfs_node, ptrs) + 1826 sizeof(struct btrfs_key_ptr) * nr; 1827 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1828 } 1829 1830 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1831 { 1832 unsigned long ptr; 1833 ptr = offsetof(struct btrfs_node, ptrs) + 1834 sizeof(struct btrfs_key_ptr) * nr; 1835 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1836 } 1837 1838 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1839 int nr, u64 val) 1840 { 1841 unsigned long ptr; 1842 ptr = offsetof(struct btrfs_node, ptrs) + 1843 sizeof(struct btrfs_key_ptr) * nr; 1844 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1845 } 1846 1847 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1848 { 1849 return offsetof(struct btrfs_node, ptrs) + 1850 sizeof(struct btrfs_key_ptr) * nr; 1851 } 1852 1853 void btrfs_node_key(struct extent_buffer *eb, 1854 struct btrfs_disk_key *disk_key, int nr); 1855 1856 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1857 struct btrfs_disk_key *disk_key, int nr) 1858 { 1859 unsigned long ptr; 1860 ptr = btrfs_node_key_ptr_offset(nr); 1861 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1862 struct btrfs_key_ptr, key, disk_key); 1863 } 1864 1865 /* struct btrfs_item */ 1866 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1867 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1868 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1869 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1870 1871 static inline unsigned long btrfs_item_nr_offset(int nr) 1872 { 1873 return offsetof(struct btrfs_leaf, items) + 1874 sizeof(struct btrfs_item) * nr; 1875 } 1876 1877 static inline struct btrfs_item *btrfs_item_nr(int nr) 1878 { 1879 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1880 } 1881 1882 static inline u32 btrfs_item_end(struct extent_buffer *eb, 1883 struct btrfs_item *item) 1884 { 1885 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1886 } 1887 1888 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) 1889 { 1890 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1891 } 1892 1893 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) 1894 { 1895 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1896 } 1897 1898 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) 1899 { 1900 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1901 } 1902 1903 static inline void btrfs_item_key(struct extent_buffer *eb, 1904 struct btrfs_disk_key *disk_key, int nr) 1905 { 1906 struct btrfs_item *item = btrfs_item_nr(nr); 1907 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1908 } 1909 1910 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1911 struct btrfs_disk_key *disk_key, int nr) 1912 { 1913 struct btrfs_item *item = btrfs_item_nr(nr); 1914 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1915 } 1916 1917 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1918 1919 /* 1920 * struct btrfs_root_ref 1921 */ 1922 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1923 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1924 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1925 1926 /* struct btrfs_dir_item */ 1927 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1928 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1929 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1930 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1931 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1932 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1933 data_len, 16); 1934 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1935 name_len, 16); 1936 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1937 transid, 64); 1938 1939 static inline void btrfs_dir_item_key(struct extent_buffer *eb, 1940 struct btrfs_dir_item *item, 1941 struct btrfs_disk_key *key) 1942 { 1943 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1944 } 1945 1946 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1947 struct btrfs_dir_item *item, 1948 struct btrfs_disk_key *key) 1949 { 1950 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1951 } 1952 1953 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1954 num_entries, 64); 1955 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1956 num_bitmaps, 64); 1957 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1958 generation, 64); 1959 1960 static inline void btrfs_free_space_key(struct extent_buffer *eb, 1961 struct btrfs_free_space_header *h, 1962 struct btrfs_disk_key *key) 1963 { 1964 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1965 } 1966 1967 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1968 struct btrfs_free_space_header *h, 1969 struct btrfs_disk_key *key) 1970 { 1971 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1972 } 1973 1974 /* struct btrfs_disk_key */ 1975 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1976 objectid, 64); 1977 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1978 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1979 1980 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1981 const struct btrfs_disk_key *disk) 1982 { 1983 cpu->offset = le64_to_cpu(disk->offset); 1984 cpu->type = disk->type; 1985 cpu->objectid = le64_to_cpu(disk->objectid); 1986 } 1987 1988 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1989 const struct btrfs_key *cpu) 1990 { 1991 disk->offset = cpu_to_le64(cpu->offset); 1992 disk->type = cpu->type; 1993 disk->objectid = cpu_to_le64(cpu->objectid); 1994 } 1995 1996 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, 1997 struct btrfs_key *key, int nr) 1998 { 1999 struct btrfs_disk_key disk_key; 2000 btrfs_node_key(eb, &disk_key, nr); 2001 btrfs_disk_key_to_cpu(key, &disk_key); 2002 } 2003 2004 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, 2005 struct btrfs_key *key, int nr) 2006 { 2007 struct btrfs_disk_key disk_key; 2008 btrfs_item_key(eb, &disk_key, nr); 2009 btrfs_disk_key_to_cpu(key, &disk_key); 2010 } 2011 2012 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, 2013 struct btrfs_dir_item *item, 2014 struct btrfs_key *key) 2015 { 2016 struct btrfs_disk_key disk_key; 2017 btrfs_dir_item_key(eb, item, &disk_key); 2018 btrfs_disk_key_to_cpu(key, &disk_key); 2019 } 2020 2021 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2022 { 2023 return key->type; 2024 } 2025 2026 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2027 { 2028 key->type = val; 2029 } 2030 2031 /* struct btrfs_header */ 2032 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2033 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2034 generation, 64); 2035 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2036 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2037 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2038 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2039 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2040 generation, 64); 2041 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2042 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2043 nritems, 32); 2044 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2045 2046 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) 2047 { 2048 return (btrfs_header_flags(eb) & flag) == flag; 2049 } 2050 2051 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2052 { 2053 u64 flags = btrfs_header_flags(eb); 2054 btrfs_set_header_flags(eb, flags | flag); 2055 return (flags & flag) == flag; 2056 } 2057 2058 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2059 { 2060 u64 flags = btrfs_header_flags(eb); 2061 btrfs_set_header_flags(eb, flags & ~flag); 2062 return (flags & flag) == flag; 2063 } 2064 2065 static inline int btrfs_header_backref_rev(struct extent_buffer *eb) 2066 { 2067 u64 flags = btrfs_header_flags(eb); 2068 return flags >> BTRFS_BACKREF_REV_SHIFT; 2069 } 2070 2071 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2072 int rev) 2073 { 2074 u64 flags = btrfs_header_flags(eb); 2075 flags &= ~BTRFS_BACKREF_REV_MASK; 2076 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2077 btrfs_set_header_flags(eb, flags); 2078 } 2079 2080 static inline unsigned long btrfs_header_fsid(void) 2081 { 2082 return offsetof(struct btrfs_header, fsid); 2083 } 2084 2085 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) 2086 { 2087 return offsetof(struct btrfs_header, chunk_tree_uuid); 2088 } 2089 2090 static inline int btrfs_is_leaf(struct extent_buffer *eb) 2091 { 2092 return btrfs_header_level(eb) == 0; 2093 } 2094 2095 /* struct btrfs_root_item */ 2096 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2097 generation, 64); 2098 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2099 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2100 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2101 2102 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2103 generation, 64); 2104 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2105 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2106 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2107 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2108 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2109 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2110 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2111 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2112 last_snapshot, 64); 2113 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2114 generation_v2, 64); 2115 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2116 ctransid, 64); 2117 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2118 otransid, 64); 2119 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2120 stransid, 64); 2121 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2122 rtransid, 64); 2123 2124 static inline bool btrfs_root_readonly(struct btrfs_root *root) 2125 { 2126 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2127 } 2128 2129 static inline bool btrfs_root_dead(struct btrfs_root *root) 2130 { 2131 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2132 } 2133 2134 /* struct btrfs_root_backup */ 2135 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2136 tree_root, 64); 2137 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2138 tree_root_gen, 64); 2139 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2140 tree_root_level, 8); 2141 2142 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2143 chunk_root, 64); 2144 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2145 chunk_root_gen, 64); 2146 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2147 chunk_root_level, 8); 2148 2149 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2150 extent_root, 64); 2151 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2152 extent_root_gen, 64); 2153 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2154 extent_root_level, 8); 2155 2156 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2157 fs_root, 64); 2158 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2159 fs_root_gen, 64); 2160 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2161 fs_root_level, 8); 2162 2163 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2164 dev_root, 64); 2165 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2166 dev_root_gen, 64); 2167 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2168 dev_root_level, 8); 2169 2170 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2171 csum_root, 64); 2172 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2173 csum_root_gen, 64); 2174 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2175 csum_root_level, 8); 2176 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2177 total_bytes, 64); 2178 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2179 bytes_used, 64); 2180 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2181 num_devices, 64); 2182 2183 /* struct btrfs_balance_item */ 2184 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2185 2186 static inline void btrfs_balance_data(struct extent_buffer *eb, 2187 struct btrfs_balance_item *bi, 2188 struct btrfs_disk_balance_args *ba) 2189 { 2190 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2191 } 2192 2193 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2194 struct btrfs_balance_item *bi, 2195 struct btrfs_disk_balance_args *ba) 2196 { 2197 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2198 } 2199 2200 static inline void btrfs_balance_meta(struct extent_buffer *eb, 2201 struct btrfs_balance_item *bi, 2202 struct btrfs_disk_balance_args *ba) 2203 { 2204 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2205 } 2206 2207 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2208 struct btrfs_balance_item *bi, 2209 struct btrfs_disk_balance_args *ba) 2210 { 2211 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2212 } 2213 2214 static inline void btrfs_balance_sys(struct extent_buffer *eb, 2215 struct btrfs_balance_item *bi, 2216 struct btrfs_disk_balance_args *ba) 2217 { 2218 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2219 } 2220 2221 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2222 struct btrfs_balance_item *bi, 2223 struct btrfs_disk_balance_args *ba) 2224 { 2225 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2226 } 2227 2228 static inline void 2229 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2230 struct btrfs_disk_balance_args *disk) 2231 { 2232 memset(cpu, 0, sizeof(*cpu)); 2233 2234 cpu->profiles = le64_to_cpu(disk->profiles); 2235 cpu->usage = le64_to_cpu(disk->usage); 2236 cpu->devid = le64_to_cpu(disk->devid); 2237 cpu->pstart = le64_to_cpu(disk->pstart); 2238 cpu->pend = le64_to_cpu(disk->pend); 2239 cpu->vstart = le64_to_cpu(disk->vstart); 2240 cpu->vend = le64_to_cpu(disk->vend); 2241 cpu->target = le64_to_cpu(disk->target); 2242 cpu->flags = le64_to_cpu(disk->flags); 2243 cpu->limit = le64_to_cpu(disk->limit); 2244 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2245 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2246 } 2247 2248 static inline void 2249 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2250 struct btrfs_balance_args *cpu) 2251 { 2252 memset(disk, 0, sizeof(*disk)); 2253 2254 disk->profiles = cpu_to_le64(cpu->profiles); 2255 disk->usage = cpu_to_le64(cpu->usage); 2256 disk->devid = cpu_to_le64(cpu->devid); 2257 disk->pstart = cpu_to_le64(cpu->pstart); 2258 disk->pend = cpu_to_le64(cpu->pend); 2259 disk->vstart = cpu_to_le64(cpu->vstart); 2260 disk->vend = cpu_to_le64(cpu->vend); 2261 disk->target = cpu_to_le64(cpu->target); 2262 disk->flags = cpu_to_le64(cpu->flags); 2263 disk->limit = cpu_to_le64(cpu->limit); 2264 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2265 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2266 } 2267 2268 /* struct btrfs_super_block */ 2269 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2270 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2271 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2272 generation, 64); 2273 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2274 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2275 struct btrfs_super_block, sys_chunk_array_size, 32); 2276 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2277 struct btrfs_super_block, chunk_root_generation, 64); 2278 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2279 root_level, 8); 2280 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2281 chunk_root, 64); 2282 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2283 chunk_root_level, 8); 2284 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2285 log_root, 64); 2286 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2287 log_root_transid, 64); 2288 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2289 log_root_level, 8); 2290 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2291 total_bytes, 64); 2292 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2293 bytes_used, 64); 2294 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2295 sectorsize, 32); 2296 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2297 nodesize, 32); 2298 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2299 stripesize, 32); 2300 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2301 root_dir_objectid, 64); 2302 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2303 num_devices, 64); 2304 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2305 compat_flags, 64); 2306 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2307 compat_ro_flags, 64); 2308 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2309 incompat_flags, 64); 2310 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2311 csum_type, 16); 2312 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2313 cache_generation, 64); 2314 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2315 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2316 uuid_tree_generation, 64); 2317 2318 static inline int btrfs_super_csum_size(struct btrfs_super_block *s) 2319 { 2320 u16 t = btrfs_super_csum_type(s); 2321 /* 2322 * csum type is validated at mount time 2323 */ 2324 return btrfs_csum_sizes[t]; 2325 } 2326 2327 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) 2328 { 2329 return offsetof(struct btrfs_leaf, items); 2330 } 2331 2332 /* 2333 * The leaf data grows from end-to-front in the node. 2334 * this returns the address of the start of the last item, 2335 * which is the stop of the leaf data stack 2336 */ 2337 static inline unsigned int leaf_data_end(struct btrfs_fs_info *fs_info, 2338 struct extent_buffer *leaf) 2339 { 2340 u32 nr = btrfs_header_nritems(leaf); 2341 2342 if (nr == 0) 2343 return BTRFS_LEAF_DATA_SIZE(fs_info); 2344 return btrfs_item_offset_nr(leaf, nr - 1); 2345 } 2346 2347 /* struct btrfs_file_extent_item */ 2348 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2349 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2350 struct btrfs_file_extent_item, disk_bytenr, 64); 2351 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2352 struct btrfs_file_extent_item, offset, 64); 2353 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2354 struct btrfs_file_extent_item, generation, 64); 2355 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2356 struct btrfs_file_extent_item, num_bytes, 64); 2357 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2358 struct btrfs_file_extent_item, disk_num_bytes, 64); 2359 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2360 struct btrfs_file_extent_item, compression, 8); 2361 2362 static inline unsigned long 2363 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) 2364 { 2365 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2366 } 2367 2368 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2369 { 2370 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2371 } 2372 2373 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2374 disk_bytenr, 64); 2375 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2376 generation, 64); 2377 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2378 disk_num_bytes, 64); 2379 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2380 offset, 64); 2381 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2382 num_bytes, 64); 2383 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2384 ram_bytes, 64); 2385 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2386 compression, 8); 2387 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2388 encryption, 8); 2389 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2390 other_encoding, 16); 2391 2392 /* 2393 * this returns the number of bytes used by the item on disk, minus the 2394 * size of any extent headers. If a file is compressed on disk, this is 2395 * the compressed size 2396 */ 2397 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, 2398 struct btrfs_item *e) 2399 { 2400 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2401 } 2402 2403 /* this returns the number of file bytes represented by the inline item. 2404 * If an item is compressed, this is the uncompressed size 2405 */ 2406 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, 2407 int slot, 2408 struct btrfs_file_extent_item *fi) 2409 { 2410 struct btrfs_map_token token; 2411 2412 btrfs_init_map_token(&token); 2413 /* 2414 * return the space used on disk if this item isn't 2415 * compressed or encoded 2416 */ 2417 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2418 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2419 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2420 return btrfs_file_extent_inline_item_len(eb, 2421 btrfs_item_nr(slot)); 2422 } 2423 2424 /* otherwise use the ram bytes field */ 2425 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2426 } 2427 2428 2429 /* btrfs_dev_stats_item */ 2430 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, 2431 struct btrfs_dev_stats_item *ptr, 2432 int index) 2433 { 2434 u64 val; 2435 2436 read_extent_buffer(eb, &val, 2437 offsetof(struct btrfs_dev_stats_item, values) + 2438 ((unsigned long)ptr) + (index * sizeof(u64)), 2439 sizeof(val)); 2440 return val; 2441 } 2442 2443 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2444 struct btrfs_dev_stats_item *ptr, 2445 int index, u64 val) 2446 { 2447 write_extent_buffer(eb, &val, 2448 offsetof(struct btrfs_dev_stats_item, values) + 2449 ((unsigned long)ptr) + (index * sizeof(u64)), 2450 sizeof(val)); 2451 } 2452 2453 /* btrfs_qgroup_status_item */ 2454 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2455 generation, 64); 2456 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2457 version, 64); 2458 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2459 flags, 64); 2460 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2461 rescan, 64); 2462 2463 /* btrfs_qgroup_info_item */ 2464 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2465 generation, 64); 2466 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2467 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2468 rfer_cmpr, 64); 2469 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2470 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2471 excl_cmpr, 64); 2472 2473 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2474 struct btrfs_qgroup_info_item, generation, 64); 2475 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2476 rfer, 64); 2477 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2478 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2479 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2480 excl, 64); 2481 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2482 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2483 2484 /* btrfs_qgroup_limit_item */ 2485 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2486 flags, 64); 2487 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2488 max_rfer, 64); 2489 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2490 max_excl, 64); 2491 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2492 rsv_rfer, 64); 2493 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2494 rsv_excl, 64); 2495 2496 /* btrfs_dev_replace_item */ 2497 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2498 struct btrfs_dev_replace_item, src_devid, 64); 2499 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2500 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2501 64); 2502 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2503 replace_state, 64); 2504 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2505 time_started, 64); 2506 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2507 time_stopped, 64); 2508 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2509 num_write_errors, 64); 2510 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2511 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2512 64); 2513 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2514 cursor_left, 64); 2515 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2516 cursor_right, 64); 2517 2518 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2519 struct btrfs_dev_replace_item, src_devid, 64); 2520 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2521 struct btrfs_dev_replace_item, 2522 cont_reading_from_srcdev_mode, 64); 2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2524 struct btrfs_dev_replace_item, replace_state, 64); 2525 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2526 struct btrfs_dev_replace_item, time_started, 64); 2527 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2528 struct btrfs_dev_replace_item, time_stopped, 64); 2529 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2530 struct btrfs_dev_replace_item, num_write_errors, 64); 2531 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2532 struct btrfs_dev_replace_item, 2533 num_uncorrectable_read_errors, 64); 2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2535 struct btrfs_dev_replace_item, cursor_left, 64); 2536 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2537 struct btrfs_dev_replace_item, cursor_right, 64); 2538 2539 /* helper function to cast into the data area of the leaf. */ 2540 #define btrfs_item_ptr(leaf, slot, type) \ 2541 ((type *)(btrfs_leaf_data(leaf) + \ 2542 btrfs_item_offset_nr(leaf, slot))) 2543 2544 #define btrfs_item_ptr_offset(leaf, slot) \ 2545 ((unsigned long)(btrfs_leaf_data(leaf) + \ 2546 btrfs_item_offset_nr(leaf, slot))) 2547 2548 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2549 { 2550 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2551 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2552 } 2553 2554 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2555 { 2556 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2557 } 2558 2559 /* extent-tree.c */ 2560 2561 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2562 2563 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2564 unsigned num_items) 2565 { 2566 return fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2567 } 2568 2569 /* 2570 * Doing a truncate won't result in new nodes or leaves, just what we need for 2571 * COW. 2572 */ 2573 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2574 unsigned num_items) 2575 { 2576 return fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2577 } 2578 2579 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2580 struct btrfs_fs_info *fs_info); 2581 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2582 struct btrfs_fs_info *fs_info); 2583 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2584 const u64 start); 2585 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2586 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2587 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2588 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2589 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2590 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2591 struct btrfs_fs_info *fs_info, unsigned long count); 2592 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2593 unsigned long count, u64 transid, int wait); 2594 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2595 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2596 struct btrfs_fs_info *fs_info, u64 bytenr, 2597 u64 offset, int metadata, u64 *refs, u64 *flags); 2598 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2599 u64 bytenr, u64 num, int reserved); 2600 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2601 u64 bytenr, u64 num_bytes); 2602 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2603 struct extent_buffer *eb); 2604 int btrfs_cross_ref_exist(struct btrfs_root *root, 2605 u64 objectid, u64 offset, u64 bytenr); 2606 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2607 struct btrfs_fs_info *info, 2608 u64 bytenr); 2609 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2610 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2611 int get_block_group_index(struct btrfs_block_group_cache *cache); 2612 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2613 struct btrfs_root *root, 2614 u64 parent, u64 root_objectid, 2615 const struct btrfs_disk_key *key, 2616 int level, u64 hint, 2617 u64 empty_size); 2618 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2619 struct btrfs_root *root, 2620 struct extent_buffer *buf, 2621 u64 parent, int last_ref); 2622 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2623 u64 root_objectid, u64 owner, 2624 u64 offset, u64 ram_bytes, 2625 struct btrfs_key *ins); 2626 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2627 struct btrfs_fs_info *fs_info, 2628 u64 root_objectid, u64 owner, u64 offset, 2629 struct btrfs_key *ins); 2630 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2631 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2632 struct btrfs_key *ins, int is_data, int delalloc); 2633 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2634 struct extent_buffer *buf, int full_backref); 2635 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2636 struct extent_buffer *buf, int full_backref); 2637 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2638 struct btrfs_fs_info *fs_info, 2639 u64 bytenr, u64 num_bytes, u64 flags, 2640 int level, int is_data); 2641 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2642 struct btrfs_fs_info *fs_info, 2643 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2644 u64 owner, u64 offset); 2645 2646 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2647 u64 start, u64 len, int delalloc); 2648 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2649 u64 start, u64 len); 2650 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2651 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2652 struct btrfs_fs_info *fs_info); 2653 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2654 struct btrfs_fs_info *fs_info, 2655 u64 bytenr, u64 num_bytes, u64 parent, 2656 u64 root_objectid, u64 owner, u64 offset); 2657 2658 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, 2659 struct btrfs_fs_info *fs_info); 2660 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2661 struct btrfs_fs_info *fs_info); 2662 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2663 struct btrfs_fs_info *fs_info); 2664 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2665 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2666 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2667 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2668 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2669 struct btrfs_fs_info *fs_info, u64 bytes_used, 2670 u64 type, u64 chunk_objectid, u64 chunk_offset, 2671 u64 size); 2672 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2673 struct btrfs_fs_info *fs_info, 2674 const u64 chunk_offset); 2675 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2676 struct btrfs_fs_info *fs_info, u64 group_start, 2677 struct extent_map *em); 2678 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2679 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2680 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2681 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, 2682 struct btrfs_fs_info *fs_info); 2683 u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data); 2684 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2685 2686 enum btrfs_reserve_flush_enum { 2687 /* If we are in the transaction, we can't flush anything.*/ 2688 BTRFS_RESERVE_NO_FLUSH, 2689 /* 2690 * Flushing delalloc may cause deadlock somewhere, in this 2691 * case, use FLUSH LIMIT 2692 */ 2693 BTRFS_RESERVE_FLUSH_LIMIT, 2694 BTRFS_RESERVE_FLUSH_ALL, 2695 }; 2696 2697 enum btrfs_flush_state { 2698 FLUSH_DELAYED_ITEMS_NR = 1, 2699 FLUSH_DELAYED_ITEMS = 2, 2700 FLUSH_DELALLOC = 3, 2701 FLUSH_DELALLOC_WAIT = 4, 2702 ALLOC_CHUNK = 5, 2703 COMMIT_TRANS = 6, 2704 }; 2705 2706 int btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len); 2707 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2708 void btrfs_free_reserved_data_space(struct inode *inode, u64 start, u64 len); 2709 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2710 u64 len); 2711 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, 2712 struct btrfs_fs_info *fs_info); 2713 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2714 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2715 struct btrfs_inode *inode); 2716 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2717 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2718 struct btrfs_block_rsv *rsv, 2719 int nitems, 2720 u64 *qgroup_reserved, bool use_global_rsv); 2721 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2722 struct btrfs_block_rsv *rsv); 2723 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2724 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes); 2725 int btrfs_delalloc_reserve_space(struct inode *inode, u64 start, u64 len); 2726 void btrfs_delalloc_release_space(struct inode *inode, u64 start, u64 len); 2727 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2728 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2729 unsigned short type); 2730 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2731 struct btrfs_block_rsv *rsv); 2732 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2733 int btrfs_block_rsv_add(struct btrfs_root *root, 2734 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2735 enum btrfs_reserve_flush_enum flush); 2736 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2737 int btrfs_block_rsv_refill(struct btrfs_root *root, 2738 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2739 enum btrfs_reserve_flush_enum flush); 2740 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2741 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2742 int update_size); 2743 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2744 struct btrfs_block_rsv *dest, u64 num_bytes, 2745 int min_factor); 2746 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2747 struct btrfs_block_rsv *block_rsv, 2748 u64 num_bytes); 2749 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2750 struct btrfs_block_group_cache *cache); 2751 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2752 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2753 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2754 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2755 u64 start, u64 end); 2756 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2757 u64 num_bytes, u64 *actual_bytes); 2758 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2759 struct btrfs_fs_info *fs_info, u64 type); 2760 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2761 2762 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2763 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2764 struct btrfs_fs_info *fs_info); 2765 int __get_raid_index(u64 flags); 2766 int btrfs_start_write_no_snapshoting(struct btrfs_root *root); 2767 void btrfs_end_write_no_snapshoting(struct btrfs_root *root); 2768 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2769 void check_system_chunk(struct btrfs_trans_handle *trans, 2770 struct btrfs_fs_info *fs_info, const u64 type); 2771 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2772 struct btrfs_fs_info *info, u64 start, u64 end); 2773 2774 /* ctree.c */ 2775 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2776 int level, int *slot); 2777 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2778 int btrfs_previous_item(struct btrfs_root *root, 2779 struct btrfs_path *path, u64 min_objectid, 2780 int type); 2781 int btrfs_previous_extent_item(struct btrfs_root *root, 2782 struct btrfs_path *path, u64 min_objectid); 2783 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2784 struct btrfs_path *path, 2785 const struct btrfs_key *new_key); 2786 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2787 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2788 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2789 struct btrfs_key *key, int lowest_level, 2790 u64 min_trans); 2791 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2792 struct btrfs_path *path, 2793 u64 min_trans); 2794 enum btrfs_compare_tree_result { 2795 BTRFS_COMPARE_TREE_NEW, 2796 BTRFS_COMPARE_TREE_DELETED, 2797 BTRFS_COMPARE_TREE_CHANGED, 2798 BTRFS_COMPARE_TREE_SAME, 2799 }; 2800 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, 2801 struct btrfs_root *right_root, 2802 struct btrfs_path *left_path, 2803 struct btrfs_path *right_path, 2804 struct btrfs_key *key, 2805 enum btrfs_compare_tree_result result, 2806 void *ctx); 2807 int btrfs_compare_trees(struct btrfs_root *left_root, 2808 struct btrfs_root *right_root, 2809 btrfs_changed_cb_t cb, void *ctx); 2810 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2811 struct btrfs_root *root, struct extent_buffer *buf, 2812 struct extent_buffer *parent, int parent_slot, 2813 struct extent_buffer **cow_ret); 2814 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2815 struct btrfs_root *root, 2816 struct extent_buffer *buf, 2817 struct extent_buffer **cow_ret, u64 new_root_objectid); 2818 int btrfs_block_can_be_shared(struct btrfs_root *root, 2819 struct extent_buffer *buf); 2820 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2821 u32 data_size); 2822 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2823 struct btrfs_path *path, u32 new_size, int from_end); 2824 int btrfs_split_item(struct btrfs_trans_handle *trans, 2825 struct btrfs_root *root, 2826 struct btrfs_path *path, 2827 const struct btrfs_key *new_key, 2828 unsigned long split_offset); 2829 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2830 struct btrfs_root *root, 2831 struct btrfs_path *path, 2832 const struct btrfs_key *new_key); 2833 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2834 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2835 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2836 const struct btrfs_key *key, struct btrfs_path *p, 2837 int ins_len, int cow); 2838 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2839 struct btrfs_path *p, u64 time_seq); 2840 int btrfs_search_slot_for_read(struct btrfs_root *root, 2841 const struct btrfs_key *key, 2842 struct btrfs_path *p, int find_higher, 2843 int return_any); 2844 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2845 struct btrfs_root *root, struct extent_buffer *parent, 2846 int start_slot, u64 *last_ret, 2847 struct btrfs_key *progress); 2848 void btrfs_release_path(struct btrfs_path *p); 2849 struct btrfs_path *btrfs_alloc_path(void); 2850 void btrfs_free_path(struct btrfs_path *p); 2851 void btrfs_set_path_blocking(struct btrfs_path *p); 2852 void btrfs_clear_path_blocking(struct btrfs_path *p, 2853 struct extent_buffer *held, int held_rw); 2854 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2855 2856 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2857 struct btrfs_path *path, int slot, int nr); 2858 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2859 struct btrfs_root *root, 2860 struct btrfs_path *path) 2861 { 2862 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2863 } 2864 2865 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2866 const struct btrfs_key *cpu_key, u32 *data_size, 2867 u32 total_data, u32 total_size, int nr); 2868 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2869 const struct btrfs_key *key, void *data, u32 data_size); 2870 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2871 struct btrfs_root *root, 2872 struct btrfs_path *path, 2873 const struct btrfs_key *cpu_key, u32 *data_size, 2874 int nr); 2875 2876 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2877 struct btrfs_root *root, 2878 struct btrfs_path *path, 2879 const struct btrfs_key *key, 2880 u32 data_size) 2881 { 2882 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2883 } 2884 2885 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2886 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2887 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2888 u64 time_seq); 2889 static inline int btrfs_next_old_item(struct btrfs_root *root, 2890 struct btrfs_path *p, u64 time_seq) 2891 { 2892 ++p->slots[0]; 2893 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2894 return btrfs_next_old_leaf(root, p, time_seq); 2895 return 0; 2896 } 2897 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2898 { 2899 return btrfs_next_old_item(root, p, 0); 2900 } 2901 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2902 struct extent_buffer *leaf); 2903 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2904 struct btrfs_block_rsv *block_rsv, 2905 int update_ref, int for_reloc); 2906 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2907 struct btrfs_root *root, 2908 struct extent_buffer *node, 2909 struct extent_buffer *parent); 2910 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2911 { 2912 /* 2913 * Do it this way so we only ever do one test_bit in the normal case. 2914 */ 2915 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2916 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2917 return 2; 2918 return 1; 2919 } 2920 return 0; 2921 } 2922 2923 /* 2924 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2925 * anything except sleeping. This function is used to check the status of 2926 * the fs. 2927 */ 2928 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2929 { 2930 return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info); 2931 } 2932 2933 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2934 { 2935 kfree(fs_info->balance_ctl); 2936 kfree(fs_info->delayed_root); 2937 kfree(fs_info->extent_root); 2938 kfree(fs_info->tree_root); 2939 kfree(fs_info->chunk_root); 2940 kfree(fs_info->dev_root); 2941 kfree(fs_info->csum_root); 2942 kfree(fs_info->quota_root); 2943 kfree(fs_info->uuid_root); 2944 kfree(fs_info->free_space_root); 2945 kfree(fs_info->super_copy); 2946 kfree(fs_info->super_for_commit); 2947 security_free_mnt_opts(&fs_info->security_opts); 2948 kfree(fs_info); 2949 } 2950 2951 /* tree mod log functions from ctree.c */ 2952 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2953 struct seq_list *elem); 2954 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2955 struct seq_list *elem); 2956 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2957 2958 /* root-item.c */ 2959 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2960 struct btrfs_fs_info *fs_info, 2961 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2962 const char *name, int name_len); 2963 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2964 struct btrfs_fs_info *fs_info, 2965 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2966 const char *name, int name_len); 2967 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2968 const struct btrfs_key *key); 2969 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2970 const struct btrfs_key *key, 2971 struct btrfs_root_item *item); 2972 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2973 struct btrfs_root *root, 2974 struct btrfs_key *key, 2975 struct btrfs_root_item *item); 2976 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2977 struct btrfs_path *path, struct btrfs_root_item *root_item, 2978 struct btrfs_key *root_key); 2979 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2980 void btrfs_set_root_node(struct btrfs_root_item *item, 2981 struct extent_buffer *node); 2982 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2983 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2984 struct btrfs_root *root); 2985 2986 /* uuid-tree.c */ 2987 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 2988 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 2989 u64 subid); 2990 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 2991 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 2992 u64 subid); 2993 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 2994 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 2995 u64)); 2996 2997 /* dir-item.c */ 2998 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 2999 const char *name, int name_len); 3000 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3001 struct btrfs_root *root, const char *name, 3002 int name_len, struct btrfs_inode *dir, 3003 struct btrfs_key *location, u8 type, u64 index); 3004 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3005 struct btrfs_root *root, 3006 struct btrfs_path *path, u64 dir, 3007 const char *name, int name_len, 3008 int mod); 3009 struct btrfs_dir_item * 3010 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3011 struct btrfs_root *root, 3012 struct btrfs_path *path, u64 dir, 3013 u64 objectid, const char *name, int name_len, 3014 int mod); 3015 struct btrfs_dir_item * 3016 btrfs_search_dir_index_item(struct btrfs_root *root, 3017 struct btrfs_path *path, u64 dirid, 3018 const char *name, int name_len); 3019 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3020 struct btrfs_root *root, 3021 struct btrfs_path *path, 3022 struct btrfs_dir_item *di); 3023 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3024 struct btrfs_root *root, 3025 struct btrfs_path *path, u64 objectid, 3026 const char *name, u16 name_len, 3027 const void *data, u16 data_len); 3028 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3029 struct btrfs_root *root, 3030 struct btrfs_path *path, u64 dir, 3031 const char *name, u16 name_len, 3032 int mod); 3033 int verify_dir_item(struct btrfs_fs_info *fs_info, 3034 struct extent_buffer *leaf, 3035 struct btrfs_dir_item *dir_item); 3036 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3037 struct btrfs_path *path, 3038 const char *name, 3039 int name_len); 3040 3041 /* orphan.c */ 3042 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3043 struct btrfs_root *root, u64 offset); 3044 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3045 struct btrfs_root *root, u64 offset); 3046 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3047 3048 /* inode-item.c */ 3049 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3050 struct btrfs_root *root, 3051 const char *name, int name_len, 3052 u64 inode_objectid, u64 ref_objectid, u64 index); 3053 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3054 struct btrfs_root *root, 3055 const char *name, int name_len, 3056 u64 inode_objectid, u64 ref_objectid, u64 *index); 3057 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3058 struct btrfs_root *root, 3059 struct btrfs_path *path, u64 objectid); 3060 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3061 *root, struct btrfs_path *path, 3062 struct btrfs_key *location, int mod); 3063 3064 struct btrfs_inode_extref * 3065 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3066 struct btrfs_root *root, 3067 struct btrfs_path *path, 3068 const char *name, int name_len, 3069 u64 inode_objectid, u64 ref_objectid, int ins_len, 3070 int cow); 3071 3072 int btrfs_find_name_in_ext_backref(struct btrfs_path *path, 3073 u64 ref_objectid, const char *name, 3074 int name_len, 3075 struct btrfs_inode_extref **extref_ret); 3076 3077 /* file-item.c */ 3078 struct btrfs_dio_private; 3079 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3080 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3081 int btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3082 int btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3083 u64 logical_offset); 3084 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3085 struct btrfs_root *root, 3086 u64 objectid, u64 pos, 3087 u64 disk_offset, u64 disk_num_bytes, 3088 u64 num_bytes, u64 offset, u64 ram_bytes, 3089 u8 compression, u8 encryption, u16 other_encoding); 3090 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3091 struct btrfs_root *root, 3092 struct btrfs_path *path, u64 objectid, 3093 u64 bytenr, int mod); 3094 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3095 struct btrfs_root *root, 3096 struct btrfs_ordered_sum *sums); 3097 int btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3098 u64 file_start, int contig); 3099 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3100 struct list_head *list, int search_commit); 3101 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3102 const struct btrfs_path *path, 3103 struct btrfs_file_extent_item *fi, 3104 const bool new_inline, 3105 struct extent_map *em); 3106 3107 /* inode.c */ 3108 struct btrfs_delalloc_work { 3109 struct inode *inode; 3110 int delay_iput; 3111 struct completion completion; 3112 struct list_head list; 3113 struct btrfs_work work; 3114 }; 3115 3116 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3117 int delay_iput); 3118 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3119 3120 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3121 struct page *page, size_t pg_offset, u64 start, 3122 u64 len, int create); 3123 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3124 u64 *orig_start, u64 *orig_block_len, 3125 u64 *ram_bytes); 3126 3127 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ 3128 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) 3129 #define ClearPageChecked ClearPageFsMisc 3130 #define SetPageChecked SetPageFsMisc 3131 #define PageChecked PageFsMisc 3132 #endif 3133 3134 /* This forces readahead on a given range of bytes in an inode */ 3135 static inline void btrfs_force_ra(struct address_space *mapping, 3136 struct file_ra_state *ra, struct file *file, 3137 pgoff_t offset, unsigned long req_size) 3138 { 3139 page_cache_sync_readahead(mapping, ra, file, offset, req_size); 3140 } 3141 3142 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3143 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3144 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3145 struct btrfs_root *root, 3146 struct btrfs_inode *dir, struct btrfs_inode *inode, 3147 const char *name, int name_len); 3148 int btrfs_add_link(struct btrfs_trans_handle *trans, 3149 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3150 const char *name, int name_len, int add_backref, u64 index); 3151 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3152 struct btrfs_root *root, 3153 struct inode *dir, u64 objectid, 3154 const char *name, int name_len); 3155 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3156 int front); 3157 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3158 struct btrfs_root *root, 3159 struct inode *inode, u64 new_size, 3160 u32 min_type); 3161 3162 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3163 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3164 int nr); 3165 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3166 struct extent_state **cached_state, int dedupe); 3167 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3168 struct btrfs_root *new_root, 3169 struct btrfs_root *parent_root, 3170 u64 new_dirid); 3171 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3172 size_t size, struct bio *bio, 3173 unsigned long bio_flags); 3174 int btrfs_page_mkwrite(struct vm_fault *vmf); 3175 int btrfs_readpage(struct file *file, struct page *page); 3176 void btrfs_evict_inode(struct inode *inode); 3177 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3178 struct inode *btrfs_alloc_inode(struct super_block *sb); 3179 void btrfs_destroy_inode(struct inode *inode); 3180 int btrfs_drop_inode(struct inode *inode); 3181 int btrfs_init_cachep(void); 3182 void btrfs_destroy_cachep(void); 3183 long btrfs_ioctl_trans_end(struct file *file); 3184 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3185 struct btrfs_root *root, int *was_new); 3186 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3187 struct page *page, size_t pg_offset, 3188 u64 start, u64 end, int create); 3189 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3190 struct btrfs_root *root, 3191 struct inode *inode); 3192 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3193 struct btrfs_root *root, struct inode *inode); 3194 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3195 struct btrfs_inode *inode); 3196 int btrfs_orphan_cleanup(struct btrfs_root *root); 3197 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3198 struct btrfs_root *root); 3199 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3200 void btrfs_invalidate_inodes(struct btrfs_root *root); 3201 void btrfs_add_delayed_iput(struct inode *inode); 3202 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3203 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3204 u64 start, u64 num_bytes, u64 min_size, 3205 loff_t actual_len, u64 *alloc_hint); 3206 int btrfs_prealloc_file_range_trans(struct inode *inode, 3207 struct btrfs_trans_handle *trans, int mode, 3208 u64 start, u64 num_bytes, u64 min_size, 3209 loff_t actual_len, u64 *alloc_hint); 3210 extern const struct dentry_operations btrfs_dentry_operations; 3211 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3212 void btrfs_test_inode_set_ops(struct inode *inode); 3213 #endif 3214 3215 /* ioctl.c */ 3216 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3217 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3218 int btrfs_ioctl_get_supported_features(void __user *arg); 3219 void btrfs_update_iflags(struct inode *inode); 3220 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); 3221 int btrfs_is_empty_uuid(u8 *uuid); 3222 int btrfs_defrag_file(struct inode *inode, struct file *file, 3223 struct btrfs_ioctl_defrag_range_args *range, 3224 u64 newer_than, unsigned long max_pages); 3225 void btrfs_get_block_group_info(struct list_head *groups_list, 3226 struct btrfs_ioctl_space_info *space); 3227 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3228 struct btrfs_ioctl_balance_args *bargs); 3229 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3230 struct file *dst_file, u64 dst_loff); 3231 3232 /* file.c */ 3233 int btrfs_auto_defrag_init(void); 3234 void btrfs_auto_defrag_exit(void); 3235 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3236 struct btrfs_inode *inode); 3237 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3238 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3239 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3240 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3241 int skip_pinned); 3242 extern const struct file_operations btrfs_file_operations; 3243 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3244 struct btrfs_root *root, struct inode *inode, 3245 struct btrfs_path *path, u64 start, u64 end, 3246 u64 *drop_end, int drop_cache, 3247 int replace_extent, 3248 u32 extent_item_size, 3249 int *key_inserted); 3250 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3251 struct btrfs_root *root, struct inode *inode, u64 start, 3252 u64 end, int drop_cache); 3253 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3254 struct btrfs_inode *inode, u64 start, u64 end); 3255 int btrfs_release_file(struct inode *inode, struct file *file); 3256 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3257 size_t num_pages, loff_t pos, size_t write_bytes, 3258 struct extent_state **cached); 3259 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3260 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3261 struct file *file_out, loff_t pos_out, u64 len); 3262 3263 /* tree-defrag.c */ 3264 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3265 struct btrfs_root *root); 3266 3267 /* sysfs.c */ 3268 int btrfs_init_sysfs(void); 3269 void btrfs_exit_sysfs(void); 3270 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3271 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3272 3273 /* xattr.c */ 3274 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 3275 3276 /* super.c */ 3277 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3278 unsigned long new_flags); 3279 int btrfs_sync_fs(struct super_block *sb, int wait); 3280 3281 static inline __printf(2, 3) 3282 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3283 { 3284 } 3285 3286 #ifdef CONFIG_PRINTK 3287 __printf(2, 3) 3288 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3289 #else 3290 #define btrfs_printk(fs_info, fmt, args...) \ 3291 btrfs_no_printk(fs_info, fmt, ##args) 3292 #endif 3293 3294 #define btrfs_emerg(fs_info, fmt, args...) \ 3295 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3296 #define btrfs_alert(fs_info, fmt, args...) \ 3297 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3298 #define btrfs_crit(fs_info, fmt, args...) \ 3299 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3300 #define btrfs_err(fs_info, fmt, args...) \ 3301 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3302 #define btrfs_warn(fs_info, fmt, args...) \ 3303 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3304 #define btrfs_notice(fs_info, fmt, args...) \ 3305 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3306 #define btrfs_info(fs_info, fmt, args...) \ 3307 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3308 3309 /* 3310 * Wrappers that use printk_in_rcu 3311 */ 3312 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3313 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3314 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3315 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3316 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3317 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3318 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3319 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3320 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3321 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3322 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3323 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3324 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3326 3327 /* 3328 * Wrappers that use a ratelimited printk_in_rcu 3329 */ 3330 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3331 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3332 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3333 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3334 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3335 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3336 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3337 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3338 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3339 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3340 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3341 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3342 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3343 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3344 3345 /* 3346 * Wrappers that use a ratelimited printk 3347 */ 3348 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3349 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3350 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3351 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3352 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3353 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3354 #define btrfs_err_rl(fs_info, fmt, args...) \ 3355 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3356 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3357 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3358 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3359 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3360 #define btrfs_info_rl(fs_info, fmt, args...) \ 3361 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3362 3363 #if defined(CONFIG_DYNAMIC_DEBUG) 3364 #define btrfs_debug(fs_info, fmt, args...) \ 3365 do { \ 3366 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3367 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3368 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3369 } while (0) 3370 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3371 do { \ 3372 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3373 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3374 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3375 } while (0) 3376 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3377 do { \ 3378 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3379 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3380 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3381 ##args);\ 3382 } while (0) 3383 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3384 do { \ 3385 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3386 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3387 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3388 ##args); \ 3389 } while (0) 3390 #elif defined(DEBUG) 3391 #define btrfs_debug(fs_info, fmt, args...) \ 3392 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3393 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3394 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3395 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3396 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3397 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3398 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3399 #else 3400 #define btrfs_debug(fs_info, fmt, args...) \ 3401 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3402 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3403 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3404 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3405 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3406 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3407 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3408 #endif 3409 3410 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3411 do { \ 3412 rcu_read_lock(); \ 3413 btrfs_printk(fs_info, fmt, ##args); \ 3414 rcu_read_unlock(); \ 3415 } while (0) 3416 3417 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3418 do { \ 3419 static DEFINE_RATELIMIT_STATE(_rs, \ 3420 DEFAULT_RATELIMIT_INTERVAL, \ 3421 DEFAULT_RATELIMIT_BURST); \ 3422 if (__ratelimit(&_rs)) \ 3423 btrfs_printk(fs_info, fmt, ##args); \ 3424 } while (0) 3425 3426 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3427 do { \ 3428 rcu_read_lock(); \ 3429 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3430 rcu_read_unlock(); \ 3431 } while (0) 3432 3433 #ifdef CONFIG_BTRFS_ASSERT 3434 3435 __cold 3436 static inline void assfail(char *expr, char *file, int line) 3437 { 3438 pr_err("assertion failed: %s, file: %s, line: %d\n", 3439 expr, file, line); 3440 BUG(); 3441 } 3442 3443 #define ASSERT(expr) \ 3444 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3445 #else 3446 #define ASSERT(expr) ((void)0) 3447 #endif 3448 3449 __printf(5, 6) 3450 __cold 3451 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3452 unsigned int line, int errno, const char *fmt, ...); 3453 3454 const char *btrfs_decode_error(int errno); 3455 3456 __cold 3457 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3458 const char *function, 3459 unsigned int line, int errno); 3460 3461 /* 3462 * Call btrfs_abort_transaction as early as possible when an error condition is 3463 * detected, that way the exact line number is reported. 3464 */ 3465 #define btrfs_abort_transaction(trans, errno) \ 3466 do { \ 3467 /* Report first abort since mount */ \ 3468 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3469 &((trans)->fs_info->fs_state))) { \ 3470 if ((errno) != -EIO) { \ 3471 WARN(1, KERN_DEBUG \ 3472 "BTRFS: Transaction aborted (error %d)\n", \ 3473 (errno)); \ 3474 } else { \ 3475 btrfs_debug((trans)->fs_info, \ 3476 "Transaction aborted (error %d)", \ 3477 (errno)); \ 3478 } \ 3479 } \ 3480 __btrfs_abort_transaction((trans), __func__, \ 3481 __LINE__, (errno)); \ 3482 } while (0) 3483 3484 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3485 do { \ 3486 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3487 (errno), fmt, ##args); \ 3488 } while (0) 3489 3490 __printf(5, 6) 3491 __cold 3492 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3493 unsigned int line, int errno, const char *fmt, ...); 3494 /* 3495 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3496 * will panic(). Otherwise we BUG() here. 3497 */ 3498 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3499 do { \ 3500 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3501 BUG(); \ 3502 } while (0) 3503 3504 3505 /* compatibility and incompatibility defines */ 3506 3507 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3508 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3509 3510 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3511 u64 flag) 3512 { 3513 struct btrfs_super_block *disk_super; 3514 u64 features; 3515 3516 disk_super = fs_info->super_copy; 3517 features = btrfs_super_incompat_flags(disk_super); 3518 if (!(features & flag)) { 3519 spin_lock(&fs_info->super_lock); 3520 features = btrfs_super_incompat_flags(disk_super); 3521 if (!(features & flag)) { 3522 features |= flag; 3523 btrfs_set_super_incompat_flags(disk_super, features); 3524 btrfs_info(fs_info, "setting %llu feature flag", 3525 flag); 3526 } 3527 spin_unlock(&fs_info->super_lock); 3528 } 3529 } 3530 3531 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3532 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3533 3534 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3535 u64 flag) 3536 { 3537 struct btrfs_super_block *disk_super; 3538 u64 features; 3539 3540 disk_super = fs_info->super_copy; 3541 features = btrfs_super_incompat_flags(disk_super); 3542 if (features & flag) { 3543 spin_lock(&fs_info->super_lock); 3544 features = btrfs_super_incompat_flags(disk_super); 3545 if (features & flag) { 3546 features &= ~flag; 3547 btrfs_set_super_incompat_flags(disk_super, features); 3548 btrfs_info(fs_info, "clearing %llu feature flag", 3549 flag); 3550 } 3551 spin_unlock(&fs_info->super_lock); 3552 } 3553 } 3554 3555 #define btrfs_fs_incompat(fs_info, opt) \ 3556 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3557 3558 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3559 { 3560 struct btrfs_super_block *disk_super; 3561 disk_super = fs_info->super_copy; 3562 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3563 } 3564 3565 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3566 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3567 3568 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3569 u64 flag) 3570 { 3571 struct btrfs_super_block *disk_super; 3572 u64 features; 3573 3574 disk_super = fs_info->super_copy; 3575 features = btrfs_super_compat_ro_flags(disk_super); 3576 if (!(features & flag)) { 3577 spin_lock(&fs_info->super_lock); 3578 features = btrfs_super_compat_ro_flags(disk_super); 3579 if (!(features & flag)) { 3580 features |= flag; 3581 btrfs_set_super_compat_ro_flags(disk_super, features); 3582 btrfs_info(fs_info, "setting %llu ro feature flag", 3583 flag); 3584 } 3585 spin_unlock(&fs_info->super_lock); 3586 } 3587 } 3588 3589 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3590 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3591 3592 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3593 u64 flag) 3594 { 3595 struct btrfs_super_block *disk_super; 3596 u64 features; 3597 3598 disk_super = fs_info->super_copy; 3599 features = btrfs_super_compat_ro_flags(disk_super); 3600 if (features & flag) { 3601 spin_lock(&fs_info->super_lock); 3602 features = btrfs_super_compat_ro_flags(disk_super); 3603 if (features & flag) { 3604 features &= ~flag; 3605 btrfs_set_super_compat_ro_flags(disk_super, features); 3606 btrfs_info(fs_info, "clearing %llu ro feature flag", 3607 flag); 3608 } 3609 spin_unlock(&fs_info->super_lock); 3610 } 3611 } 3612 3613 #define btrfs_fs_compat_ro(fs_info, opt) \ 3614 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3615 3616 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3617 { 3618 struct btrfs_super_block *disk_super; 3619 disk_super = fs_info->super_copy; 3620 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3621 } 3622 3623 /* acl.c */ 3624 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3625 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3626 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3627 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3628 struct inode *inode, struct inode *dir); 3629 #else 3630 #define btrfs_get_acl NULL 3631 #define btrfs_set_acl NULL 3632 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3633 struct inode *inode, struct inode *dir) 3634 { 3635 return 0; 3636 } 3637 #endif 3638 3639 /* relocation.c */ 3640 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3641 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3642 struct btrfs_root *root); 3643 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3644 struct btrfs_root *root); 3645 int btrfs_recover_relocation(struct btrfs_root *root); 3646 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3647 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3648 struct btrfs_root *root, struct extent_buffer *buf, 3649 struct extent_buffer *cow); 3650 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3651 u64 *bytes_to_reserve); 3652 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3653 struct btrfs_pending_snapshot *pending); 3654 3655 /* scrub.c */ 3656 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3657 u64 end, struct btrfs_scrub_progress *progress, 3658 int readonly, int is_dev_replace); 3659 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3660 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3661 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3662 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3663 struct btrfs_device *dev); 3664 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3665 struct btrfs_scrub_progress *progress); 3666 static inline void btrfs_init_full_stripe_locks_tree( 3667 struct btrfs_full_stripe_locks_tree *locks_root) 3668 { 3669 locks_root->root = RB_ROOT; 3670 mutex_init(&locks_root->lock); 3671 } 3672 3673 /* dev-replace.c */ 3674 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3675 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3676 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3677 3678 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3679 { 3680 btrfs_bio_counter_sub(fs_info, 1); 3681 } 3682 3683 /* reada.c */ 3684 struct reada_control { 3685 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3686 struct btrfs_key key_start; 3687 struct btrfs_key key_end; /* exclusive */ 3688 atomic_t elems; 3689 struct kref refcnt; 3690 wait_queue_head_t wait; 3691 }; 3692 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3693 struct btrfs_key *start, struct btrfs_key *end); 3694 int btrfs_reada_wait(void *handle); 3695 void btrfs_reada_detach(void *handle); 3696 int btree_readahead_hook(struct extent_buffer *eb, int err); 3697 3698 static inline int is_fstree(u64 rootid) 3699 { 3700 if (rootid == BTRFS_FS_TREE_OBJECTID || 3701 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3702 !btrfs_qgroup_level(rootid))) 3703 return 1; 3704 return 0; 3705 } 3706 3707 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3708 { 3709 return signal_pending(current); 3710 } 3711 3712 /* Sanity test specific functions */ 3713 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3714 void btrfs_test_destroy_inode(struct inode *inode); 3715 #endif 3716 3717 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3718 { 3719 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3720 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3721 &fs_info->fs_state))) 3722 return 1; 3723 #endif 3724 return 0; 3725 } 3726 #endif 3727