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