1 /* 2 * Copyright (C) 2007 Oracle. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public 6 * License v2 as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 11 * General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public 14 * License along with this program; if not, write to the 15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 16 * Boston, MA 021110-1307, USA. 17 */ 18 19 #ifndef __BTRFS_CTREE__ 20 #define __BTRFS_CTREE__ 21 22 #include <linux/mm.h> 23 #include <linux/sched/signal.h> 24 #include <linux/highmem.h> 25 #include <linux/fs.h> 26 #include <linux/rwsem.h> 27 #include <linux/semaphore.h> 28 #include <linux/completion.h> 29 #include <linux/backing-dev.h> 30 #include <linux/wait.h> 31 #include <linux/slab.h> 32 #include <linux/kobject.h> 33 #include <trace/events/btrfs.h> 34 #include <asm/kmap_types.h> 35 #include <linux/pagemap.h> 36 #include <linux/btrfs.h> 37 #include <linux/btrfs_tree.h> 38 #include <linux/workqueue.h> 39 #include <linux/security.h> 40 #include <linux/sizes.h> 41 #include <linux/dynamic_debug.h> 42 #include <linux/refcount.h> 43 #include "extent_io.h" 44 #include "extent_map.h" 45 #include "async-thread.h" 46 47 struct btrfs_trans_handle; 48 struct btrfs_transaction; 49 struct btrfs_pending_snapshot; 50 extern struct kmem_cache *btrfs_trans_handle_cachep; 51 extern struct kmem_cache *btrfs_bit_radix_cachep; 52 extern struct kmem_cache *btrfs_path_cachep; 53 extern struct kmem_cache *btrfs_free_space_cachep; 54 struct btrfs_ordered_sum; 55 56 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 57 #define STATIC noinline 58 #else 59 #define STATIC static noinline 60 #endif 61 62 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ 63 64 #define BTRFS_MAX_MIRRORS 3 65 66 #define BTRFS_MAX_LEVEL 8 67 68 #define BTRFS_COMPAT_EXTENT_TREE_V0 69 70 /* 71 * the max metadata block size. This limit is somewhat artificial, 72 * but the memmove costs go through the roof for larger blocks. 73 */ 74 #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 75 76 /* 77 * we can actually store much bigger names, but lets not confuse the rest 78 * of linux 79 */ 80 #define BTRFS_NAME_LEN 255 81 82 /* 83 * Theoretical limit is larger, but we keep this down to a sane 84 * value. That should limit greatly the possibility of collisions on 85 * inode ref items. 86 */ 87 #define BTRFS_LINK_MAX 65535U 88 89 static const int btrfs_csum_sizes[] = { 4 }; 90 91 /* four bytes for CRC32 */ 92 #define BTRFS_EMPTY_DIR_SIZE 0 93 94 /* ioprio of readahead is set to idle */ 95 #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) 96 97 #define BTRFS_DIRTY_METADATA_THRESH SZ_32M 98 99 #define BTRFS_MAX_EXTENT_SIZE SZ_128M 100 101 /* 102 * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size 103 */ 104 static inline u32 count_max_extents(u64 size) 105 { 106 return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); 107 } 108 109 struct btrfs_mapping_tree { 110 struct extent_map_tree map_tree; 111 }; 112 113 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 114 { 115 BUG_ON(num_stripes == 0); 116 return sizeof(struct btrfs_chunk) + 117 sizeof(struct btrfs_stripe) * (num_stripes - 1); 118 } 119 120 /* 121 * File system states 122 */ 123 #define BTRFS_FS_STATE_ERROR 0 124 #define BTRFS_FS_STATE_REMOUNTING 1 125 #define BTRFS_FS_STATE_TRANS_ABORTED 2 126 #define BTRFS_FS_STATE_DEV_REPLACING 3 127 #define BTRFS_FS_STATE_DUMMY_FS_INFO 4 128 129 #define BTRFS_BACKREF_REV_MAX 256 130 #define BTRFS_BACKREF_REV_SHIFT 56 131 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 132 BTRFS_BACKREF_REV_SHIFT) 133 134 #define BTRFS_OLD_BACKREF_REV 0 135 #define BTRFS_MIXED_BACKREF_REV 1 136 137 /* 138 * every tree block (leaf or node) starts with this header. 139 */ 140 struct btrfs_header { 141 /* these first four must match the super block */ 142 u8 csum[BTRFS_CSUM_SIZE]; 143 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 144 __le64 bytenr; /* which block this node is supposed to live in */ 145 __le64 flags; 146 147 /* allowed to be different from the super from here on down */ 148 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 149 __le64 generation; 150 __le64 owner; 151 __le32 nritems; 152 u8 level; 153 } __attribute__ ((__packed__)); 154 155 /* 156 * this is a very generous portion of the super block, giving us 157 * room to translate 14 chunks with 3 stripes each. 158 */ 159 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 160 161 /* 162 * just in case we somehow lose the roots and are not able to mount, 163 * we store an array of the roots from previous transactions 164 * in the super. 165 */ 166 #define BTRFS_NUM_BACKUP_ROOTS 4 167 struct btrfs_root_backup { 168 __le64 tree_root; 169 __le64 tree_root_gen; 170 171 __le64 chunk_root; 172 __le64 chunk_root_gen; 173 174 __le64 extent_root; 175 __le64 extent_root_gen; 176 177 __le64 fs_root; 178 __le64 fs_root_gen; 179 180 __le64 dev_root; 181 __le64 dev_root_gen; 182 183 __le64 csum_root; 184 __le64 csum_root_gen; 185 186 __le64 total_bytes; 187 __le64 bytes_used; 188 __le64 num_devices; 189 /* future */ 190 __le64 unused_64[4]; 191 192 u8 tree_root_level; 193 u8 chunk_root_level; 194 u8 extent_root_level; 195 u8 fs_root_level; 196 u8 dev_root_level; 197 u8 csum_root_level; 198 /* future and to align */ 199 u8 unused_8[10]; 200 } __attribute__ ((__packed__)); 201 202 /* 203 * the super block basically lists the main trees of the FS 204 * it currently lacks any block count etc etc 205 */ 206 struct btrfs_super_block { 207 u8 csum[BTRFS_CSUM_SIZE]; 208 /* the first 4 fields must match struct btrfs_header */ 209 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 210 __le64 bytenr; /* this block number */ 211 __le64 flags; 212 213 /* allowed to be different from the btrfs_header from here own down */ 214 __le64 magic; 215 __le64 generation; 216 __le64 root; 217 __le64 chunk_root; 218 __le64 log_root; 219 220 /* this will help find the new super based on the log root */ 221 __le64 log_root_transid; 222 __le64 total_bytes; 223 __le64 bytes_used; 224 __le64 root_dir_objectid; 225 __le64 num_devices; 226 __le32 sectorsize; 227 __le32 nodesize; 228 __le32 __unused_leafsize; 229 __le32 stripesize; 230 __le32 sys_chunk_array_size; 231 __le64 chunk_root_generation; 232 __le64 compat_flags; 233 __le64 compat_ro_flags; 234 __le64 incompat_flags; 235 __le16 csum_type; 236 u8 root_level; 237 u8 chunk_root_level; 238 u8 log_root_level; 239 struct btrfs_dev_item dev_item; 240 241 char label[BTRFS_LABEL_SIZE]; 242 243 __le64 cache_generation; 244 __le64 uuid_tree_generation; 245 246 /* future expansion */ 247 __le64 reserved[30]; 248 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 249 struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; 250 } __attribute__ ((__packed__)); 251 252 /* 253 * Compat flags that we support. If any incompat flags are set other than the 254 * ones specified below then we will fail to mount 255 */ 256 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 257 #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL 258 #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL 259 260 #define BTRFS_FEATURE_COMPAT_RO_SUPP \ 261 (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ 262 BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) 263 264 #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL 265 #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL 266 267 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 268 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 269 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ 270 BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ 271 BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ 272 BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ 273 BTRFS_FEATURE_INCOMPAT_RAID56 | \ 274 BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ 275 BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ 276 BTRFS_FEATURE_INCOMPAT_NO_HOLES) 277 278 #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ 279 (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) 280 #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL 281 282 /* 283 * A leaf is full of items. offset and size tell us where to find 284 * the item in the leaf (relative to the start of the data area) 285 */ 286 struct btrfs_item { 287 struct btrfs_disk_key key; 288 __le32 offset; 289 __le32 size; 290 } __attribute__ ((__packed__)); 291 292 /* 293 * leaves have an item area and a data area: 294 * [item0, item1....itemN] [free space] [dataN...data1, data0] 295 * 296 * The data is separate from the items to get the keys closer together 297 * during searches. 298 */ 299 struct btrfs_leaf { 300 struct btrfs_header header; 301 struct btrfs_item items[]; 302 } __attribute__ ((__packed__)); 303 304 /* 305 * all non-leaf blocks are nodes, they hold only keys and pointers to 306 * other blocks 307 */ 308 struct btrfs_key_ptr { 309 struct btrfs_disk_key key; 310 __le64 blockptr; 311 __le64 generation; 312 } __attribute__ ((__packed__)); 313 314 struct btrfs_node { 315 struct btrfs_header header; 316 struct btrfs_key_ptr ptrs[]; 317 } __attribute__ ((__packed__)); 318 319 /* 320 * btrfs_paths remember the path taken from the root down to the leaf. 321 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 322 * to any other levels that are present. 323 * 324 * The slots array records the index of the item or block pointer 325 * used while walking the tree. 326 */ 327 enum { READA_NONE = 0, READA_BACK, READA_FORWARD }; 328 struct btrfs_path { 329 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 330 int slots[BTRFS_MAX_LEVEL]; 331 /* if there is real range locking, this locks field will change */ 332 u8 locks[BTRFS_MAX_LEVEL]; 333 u8 reada; 334 /* keep some upper locks as we walk down */ 335 u8 lowest_level; 336 337 /* 338 * set by btrfs_split_item, tells search_slot to keep all locks 339 * and to force calls to keep space in the nodes 340 */ 341 unsigned int search_for_split:1; 342 unsigned int keep_locks:1; 343 unsigned int skip_locking:1; 344 unsigned int leave_spinning:1; 345 unsigned int search_commit_root:1; 346 unsigned int need_commit_sem:1; 347 unsigned int skip_release_on_error:1; 348 }; 349 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ 350 sizeof(struct btrfs_item)) 351 struct btrfs_dev_replace { 352 u64 replace_state; /* see #define above */ 353 u64 time_started; /* seconds since 1-Jan-1970 */ 354 u64 time_stopped; /* seconds since 1-Jan-1970 */ 355 atomic64_t num_write_errors; 356 atomic64_t num_uncorrectable_read_errors; 357 358 u64 cursor_left; 359 u64 committed_cursor_left; 360 u64 cursor_left_last_write_of_item; 361 u64 cursor_right; 362 363 u64 cont_reading_from_srcdev_mode; /* see #define above */ 364 365 int is_valid; 366 int item_needs_writeback; 367 struct btrfs_device *srcdev; 368 struct btrfs_device *tgtdev; 369 370 pid_t lock_owner; 371 atomic_t nesting_level; 372 struct mutex lock_finishing_cancel_unmount; 373 rwlock_t lock; 374 atomic_t read_locks; 375 atomic_t blocking_readers; 376 wait_queue_head_t read_lock_wq; 377 378 struct btrfs_scrub_progress scrub_progress; 379 }; 380 381 /* For raid type sysfs entries */ 382 struct raid_kobject { 383 int raid_type; 384 struct kobject kobj; 385 }; 386 387 struct btrfs_space_info { 388 spinlock_t lock; 389 390 u64 total_bytes; /* total bytes in the space, 391 this doesn't take mirrors into account */ 392 u64 bytes_used; /* total bytes used, 393 this doesn't take mirrors into account */ 394 u64 bytes_pinned; /* total bytes pinned, will be freed when the 395 transaction finishes */ 396 u64 bytes_reserved; /* total bytes the allocator has reserved for 397 current allocations */ 398 u64 bytes_may_use; /* number of bytes that may be used for 399 delalloc/allocations */ 400 u64 bytes_readonly; /* total bytes that are read only */ 401 402 u64 max_extent_size; /* This will hold the maximum extent size of 403 the space info if we had an ENOSPC in the 404 allocator. */ 405 406 unsigned int full:1; /* indicates that we cannot allocate any more 407 chunks for this space */ 408 unsigned int chunk_alloc:1; /* set if we are allocating a chunk */ 409 410 unsigned int flush:1; /* set if we are trying to make space */ 411 412 unsigned int force_alloc; /* set if we need to force a chunk 413 alloc for this space */ 414 415 u64 disk_used; /* total bytes used on disk */ 416 u64 disk_total; /* total bytes on disk, takes mirrors into 417 account */ 418 419 u64 flags; 420 421 /* 422 * bytes_pinned is kept in line with what is actually pinned, as in 423 * we've called update_block_group and dropped the bytes_used counter 424 * and increased the bytes_pinned counter. However this means that 425 * bytes_pinned does not reflect the bytes that will be pinned once the 426 * delayed refs are flushed, so this counter is inc'ed every time we 427 * call btrfs_free_extent so it is a realtime count of what will be 428 * freed once the transaction is committed. It will be zeroed every 429 * time the transaction commits. 430 */ 431 struct percpu_counter total_bytes_pinned; 432 433 struct list_head list; 434 /* Protected by the spinlock 'lock'. */ 435 struct list_head ro_bgs; 436 struct list_head priority_tickets; 437 struct list_head tickets; 438 /* 439 * tickets_id just indicates the next ticket will be handled, so note 440 * it's not stored per ticket. 441 */ 442 u64 tickets_id; 443 444 struct rw_semaphore groups_sem; 445 /* for block groups in our same type */ 446 struct list_head block_groups[BTRFS_NR_RAID_TYPES]; 447 wait_queue_head_t wait; 448 449 struct kobject kobj; 450 struct kobject *block_group_kobjs[BTRFS_NR_RAID_TYPES]; 451 }; 452 453 #define BTRFS_BLOCK_RSV_GLOBAL 1 454 #define BTRFS_BLOCK_RSV_DELALLOC 2 455 #define BTRFS_BLOCK_RSV_TRANS 3 456 #define BTRFS_BLOCK_RSV_CHUNK 4 457 #define BTRFS_BLOCK_RSV_DELOPS 5 458 #define BTRFS_BLOCK_RSV_EMPTY 6 459 #define BTRFS_BLOCK_RSV_TEMP 7 460 461 struct btrfs_block_rsv { 462 u64 size; 463 u64 reserved; 464 struct btrfs_space_info *space_info; 465 spinlock_t lock; 466 unsigned short full; 467 unsigned short type; 468 unsigned short failfast; 469 }; 470 471 /* 472 * free clusters are used to claim free space in relatively large chunks, 473 * allowing us to do less seeky writes. They are used for all metadata 474 * allocations and data allocations in ssd mode. 475 */ 476 struct btrfs_free_cluster { 477 spinlock_t lock; 478 spinlock_t refill_lock; 479 struct rb_root root; 480 481 /* largest extent in this cluster */ 482 u64 max_size; 483 484 /* first extent starting offset */ 485 u64 window_start; 486 487 /* We did a full search and couldn't create a cluster */ 488 bool fragmented; 489 490 struct btrfs_block_group_cache *block_group; 491 /* 492 * when a cluster is allocated from a block group, we put the 493 * cluster onto a list in the block group so that it can 494 * be freed before the block group is freed. 495 */ 496 struct list_head block_group_list; 497 }; 498 499 enum btrfs_caching_type { 500 BTRFS_CACHE_NO = 0, 501 BTRFS_CACHE_STARTED = 1, 502 BTRFS_CACHE_FAST = 2, 503 BTRFS_CACHE_FINISHED = 3, 504 BTRFS_CACHE_ERROR = 4, 505 }; 506 507 enum btrfs_disk_cache_state { 508 BTRFS_DC_WRITTEN = 0, 509 BTRFS_DC_ERROR = 1, 510 BTRFS_DC_CLEAR = 2, 511 BTRFS_DC_SETUP = 3, 512 }; 513 514 struct btrfs_caching_control { 515 struct list_head list; 516 struct mutex mutex; 517 wait_queue_head_t wait; 518 struct btrfs_work work; 519 struct btrfs_block_group_cache *block_group; 520 u64 progress; 521 refcount_t count; 522 }; 523 524 /* Once caching_thread() finds this much free space, it will wake up waiters. */ 525 #define CACHING_CTL_WAKE_UP (1024 * 1024 * 2) 526 527 struct btrfs_io_ctl { 528 void *cur, *orig; 529 struct page *page; 530 struct page **pages; 531 struct btrfs_fs_info *fs_info; 532 struct inode *inode; 533 unsigned long size; 534 int index; 535 int num_pages; 536 int entries; 537 int bitmaps; 538 unsigned check_crcs:1; 539 }; 540 541 /* 542 * Tree to record all locked full stripes of a RAID5/6 block group 543 */ 544 struct btrfs_full_stripe_locks_tree { 545 struct rb_root root; 546 struct mutex lock; 547 }; 548 549 struct btrfs_block_group_cache { 550 struct btrfs_key key; 551 struct btrfs_block_group_item item; 552 struct btrfs_fs_info *fs_info; 553 struct inode *inode; 554 spinlock_t lock; 555 u64 pinned; 556 u64 reserved; 557 u64 delalloc_bytes; 558 u64 bytes_super; 559 u64 flags; 560 u64 cache_generation; 561 u32 sectorsize; 562 563 /* 564 * If the free space extent count exceeds this number, convert the block 565 * group to bitmaps. 566 */ 567 u32 bitmap_high_thresh; 568 569 /* 570 * If the free space extent count drops below this number, convert the 571 * block group back to extents. 572 */ 573 u32 bitmap_low_thresh; 574 575 /* 576 * It is just used for the delayed data space allocation because 577 * only the data space allocation and the relative metadata update 578 * can be done cross the transaction. 579 */ 580 struct rw_semaphore data_rwsem; 581 582 /* for raid56, this is a full stripe, without parity */ 583 unsigned long full_stripe_len; 584 585 unsigned int ro; 586 unsigned int iref:1; 587 unsigned int has_caching_ctl:1; 588 unsigned int removed:1; 589 590 int disk_cache_state; 591 592 /* cache tracking stuff */ 593 int cached; 594 struct btrfs_caching_control *caching_ctl; 595 u64 last_byte_to_unpin; 596 597 struct btrfs_space_info *space_info; 598 599 /* free space cache stuff */ 600 struct btrfs_free_space_ctl *free_space_ctl; 601 602 /* block group cache stuff */ 603 struct rb_node cache_node; 604 605 /* for block groups in the same raid type */ 606 struct list_head list; 607 608 /* usage count */ 609 atomic_t count; 610 611 /* List of struct btrfs_free_clusters for this block group. 612 * Today it will only have one thing on it, but that may change 613 */ 614 struct list_head cluster_list; 615 616 /* For delayed block group creation or deletion of empty block groups */ 617 struct list_head bg_list; 618 619 /* For read-only block groups */ 620 struct list_head ro_list; 621 622 atomic_t trimming; 623 624 /* For dirty block groups */ 625 struct list_head dirty_list; 626 struct list_head io_list; 627 628 struct btrfs_io_ctl io_ctl; 629 630 /* 631 * Incremented when doing extent allocations and holding a read lock 632 * on the space_info's groups_sem semaphore. 633 * Decremented when an ordered extent that represents an IO against this 634 * block group's range is created (after it's added to its inode's 635 * root's list of ordered extents) or immediately after the allocation 636 * if it's a metadata extent or fallocate extent (for these cases we 637 * don't create ordered extents). 638 */ 639 atomic_t reservations; 640 641 /* 642 * Incremented while holding the spinlock *lock* by a task checking if 643 * it can perform a nocow write (incremented if the value for the *ro* 644 * field is 0). Decremented by such tasks once they create an ordered 645 * extent or before that if some error happens before reaching that step. 646 * This is to prevent races between block group relocation and nocow 647 * writes through direct IO. 648 */ 649 atomic_t nocow_writers; 650 651 /* Lock for free space tree operations. */ 652 struct mutex free_space_lock; 653 654 /* 655 * Does the block group need to be added to the free space tree? 656 * Protected by free_space_lock. 657 */ 658 int needs_free_space; 659 660 /* Record locked full stripes for RAID5/6 block group */ 661 struct btrfs_full_stripe_locks_tree full_stripe_locks_root; 662 }; 663 664 /* delayed seq elem */ 665 struct seq_list { 666 struct list_head list; 667 u64 seq; 668 }; 669 670 #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } 671 672 #define SEQ_LAST ((u64)-1) 673 674 enum btrfs_orphan_cleanup_state { 675 ORPHAN_CLEANUP_STARTED = 1, 676 ORPHAN_CLEANUP_DONE = 2, 677 }; 678 679 /* used by the raid56 code to lock stripes for read/modify/write */ 680 struct btrfs_stripe_hash { 681 struct list_head hash_list; 682 wait_queue_head_t wait; 683 spinlock_t lock; 684 }; 685 686 /* used by the raid56 code to lock stripes for read/modify/write */ 687 struct btrfs_stripe_hash_table { 688 struct list_head stripe_cache; 689 spinlock_t cache_lock; 690 int cache_size; 691 struct btrfs_stripe_hash table[]; 692 }; 693 694 #define BTRFS_STRIPE_HASH_TABLE_BITS 11 695 696 void btrfs_init_async_reclaim_work(struct work_struct *work); 697 698 /* fs_info */ 699 struct reloc_control; 700 struct btrfs_device; 701 struct btrfs_fs_devices; 702 struct btrfs_balance_control; 703 struct btrfs_delayed_root; 704 705 #define BTRFS_FS_BARRIER 1 706 #define BTRFS_FS_CLOSING_START 2 707 #define BTRFS_FS_CLOSING_DONE 3 708 #define BTRFS_FS_LOG_RECOVERING 4 709 #define BTRFS_FS_OPEN 5 710 #define BTRFS_FS_QUOTA_ENABLED 6 711 #define BTRFS_FS_QUOTA_ENABLING 7 712 #define BTRFS_FS_QUOTA_DISABLING 8 713 #define BTRFS_FS_UPDATE_UUID_TREE_GEN 9 714 #define BTRFS_FS_CREATING_FREE_SPACE_TREE 10 715 #define BTRFS_FS_BTREE_ERR 11 716 #define BTRFS_FS_LOG1_ERR 12 717 #define BTRFS_FS_LOG2_ERR 13 718 #define BTRFS_FS_QUOTA_OVERRIDE 14 719 /* Used to record internally whether fs has been frozen */ 720 #define BTRFS_FS_FROZEN 15 721 722 /* 723 * Indicate that a whole-filesystem exclusive operation is running 724 * (device replace, resize, device add/delete, balance) 725 */ 726 #define BTRFS_FS_EXCL_OP 14 727 728 struct btrfs_fs_info { 729 u8 fsid[BTRFS_FSID_SIZE]; 730 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 731 unsigned long flags; 732 struct btrfs_root *extent_root; 733 struct btrfs_root *tree_root; 734 struct btrfs_root *chunk_root; 735 struct btrfs_root *dev_root; 736 struct btrfs_root *fs_root; 737 struct btrfs_root *csum_root; 738 struct btrfs_root *quota_root; 739 struct btrfs_root *uuid_root; 740 struct btrfs_root *free_space_root; 741 742 /* the log root tree is a directory of all the other log roots */ 743 struct btrfs_root *log_root_tree; 744 745 spinlock_t fs_roots_radix_lock; 746 struct radix_tree_root fs_roots_radix; 747 748 /* block group cache stuff */ 749 spinlock_t block_group_cache_lock; 750 u64 first_logical_byte; 751 struct rb_root block_group_cache_tree; 752 753 /* keep track of unallocated space */ 754 atomic64_t free_chunk_space; 755 756 struct extent_io_tree freed_extents[2]; 757 struct extent_io_tree *pinned_extents; 758 759 /* logical->physical extent mapping */ 760 struct btrfs_mapping_tree mapping_tree; 761 762 /* 763 * block reservation for extent, checksum, root tree and 764 * delayed dir index item 765 */ 766 struct btrfs_block_rsv global_block_rsv; 767 /* block reservation for delay allocation */ 768 struct btrfs_block_rsv delalloc_block_rsv; 769 /* block reservation for metadata operations */ 770 struct btrfs_block_rsv trans_block_rsv; 771 /* block reservation for chunk tree */ 772 struct btrfs_block_rsv chunk_block_rsv; 773 /* block reservation for delayed operations */ 774 struct btrfs_block_rsv delayed_block_rsv; 775 776 struct btrfs_block_rsv empty_block_rsv; 777 778 u64 generation; 779 u64 last_trans_committed; 780 u64 avg_delayed_ref_runtime; 781 782 /* 783 * this is updated to the current trans every time a full commit 784 * is required instead of the faster short fsync log commits 785 */ 786 u64 last_trans_log_full_commit; 787 unsigned long mount_opt; 788 /* 789 * Track requests for actions that need to be done during transaction 790 * commit (like for some mount options). 791 */ 792 unsigned long pending_changes; 793 unsigned long compress_type:4; 794 int commit_interval; 795 /* 796 * It is a suggestive number, the read side is safe even it gets a 797 * wrong number because we will write out the data into a regular 798 * extent. The write side(mount/remount) is under ->s_umount lock, 799 * so it is also safe. 800 */ 801 u64 max_inline; 802 803 struct btrfs_transaction *running_transaction; 804 wait_queue_head_t transaction_throttle; 805 wait_queue_head_t transaction_wait; 806 wait_queue_head_t transaction_blocked_wait; 807 wait_queue_head_t async_submit_wait; 808 809 /* 810 * Used to protect the incompat_flags, compat_flags, compat_ro_flags 811 * when they are updated. 812 * 813 * Because we do not clear the flags for ever, so we needn't use 814 * the lock on the read side. 815 * 816 * We also needn't use the lock when we mount the fs, because 817 * there is no other task which will update the flag. 818 */ 819 spinlock_t super_lock; 820 struct btrfs_super_block *super_copy; 821 struct btrfs_super_block *super_for_commit; 822 struct super_block *sb; 823 struct inode *btree_inode; 824 struct mutex tree_log_mutex; 825 struct mutex transaction_kthread_mutex; 826 struct mutex cleaner_mutex; 827 struct mutex chunk_mutex; 828 struct mutex volume_mutex; 829 830 /* 831 * this is taken to make sure we don't set block groups ro after 832 * the free space cache has been allocated on them 833 */ 834 struct mutex ro_block_group_mutex; 835 836 /* this is used during read/modify/write to make sure 837 * no two ios are trying to mod the same stripe at the same 838 * time 839 */ 840 struct btrfs_stripe_hash_table *stripe_hash_table; 841 842 /* 843 * this protects the ordered operations list only while we are 844 * processing all of the entries on it. This way we make 845 * sure the commit code doesn't find the list temporarily empty 846 * because another function happens to be doing non-waiting preflush 847 * before jumping into the main commit. 848 */ 849 struct mutex ordered_operations_mutex; 850 851 struct rw_semaphore commit_root_sem; 852 853 struct rw_semaphore cleanup_work_sem; 854 855 struct rw_semaphore subvol_sem; 856 struct srcu_struct subvol_srcu; 857 858 spinlock_t trans_lock; 859 /* 860 * the reloc mutex goes with the trans lock, it is taken 861 * during commit to protect us from the relocation code 862 */ 863 struct mutex reloc_mutex; 864 865 struct list_head trans_list; 866 struct list_head dead_roots; 867 struct list_head caching_block_groups; 868 869 spinlock_t delayed_iput_lock; 870 struct list_head delayed_iputs; 871 struct mutex cleaner_delayed_iput_mutex; 872 873 /* this protects tree_mod_seq_list */ 874 spinlock_t tree_mod_seq_lock; 875 atomic64_t tree_mod_seq; 876 struct list_head tree_mod_seq_list; 877 878 /* this protects tree_mod_log */ 879 rwlock_t tree_mod_log_lock; 880 struct rb_root tree_mod_log; 881 882 atomic_t nr_async_submits; 883 atomic_t async_submit_draining; 884 atomic_t nr_async_bios; 885 atomic_t async_delalloc_pages; 886 atomic_t open_ioctl_trans; 887 888 /* 889 * this is used to protect the following list -- ordered_roots. 890 */ 891 spinlock_t ordered_root_lock; 892 893 /* 894 * all fs/file tree roots in which there are data=ordered extents 895 * pending writeback are added into this list. 896 * 897 * these can span multiple transactions and basically include 898 * every dirty data page that isn't from nodatacow 899 */ 900 struct list_head ordered_roots; 901 902 struct mutex delalloc_root_mutex; 903 spinlock_t delalloc_root_lock; 904 /* all fs/file tree roots that have delalloc inodes. */ 905 struct list_head delalloc_roots; 906 907 /* 908 * there is a pool of worker threads for checksumming during writes 909 * and a pool for checksumming after reads. This is because readers 910 * can run with FS locks held, and the writers may be waiting for 911 * those locks. We don't want ordering in the pending list to cause 912 * deadlocks, and so the two are serviced separately. 913 * 914 * A third pool does submit_bio to avoid deadlocking with the other 915 * two 916 */ 917 struct btrfs_workqueue *workers; 918 struct btrfs_workqueue *delalloc_workers; 919 struct btrfs_workqueue *flush_workers; 920 struct btrfs_workqueue *endio_workers; 921 struct btrfs_workqueue *endio_meta_workers; 922 struct btrfs_workqueue *endio_raid56_workers; 923 struct btrfs_workqueue *endio_repair_workers; 924 struct btrfs_workqueue *rmw_workers; 925 struct btrfs_workqueue *endio_meta_write_workers; 926 struct btrfs_workqueue *endio_write_workers; 927 struct btrfs_workqueue *endio_freespace_worker; 928 struct btrfs_workqueue *submit_workers; 929 struct btrfs_workqueue *caching_workers; 930 struct btrfs_workqueue *readahead_workers; 931 932 /* 933 * fixup workers take dirty pages that didn't properly go through 934 * the cow mechanism and make them safe to write. It happens 935 * for the sys_munmap function call path 936 */ 937 struct btrfs_workqueue *fixup_workers; 938 struct btrfs_workqueue *delayed_workers; 939 940 /* the extent workers do delayed refs on the extent allocation tree */ 941 struct btrfs_workqueue *extent_workers; 942 struct task_struct *transaction_kthread; 943 struct task_struct *cleaner_kthread; 944 int thread_pool_size; 945 946 struct kobject *space_info_kobj; 947 948 u64 total_pinned; 949 950 /* used to keep from writing metadata until there is a nice batch */ 951 struct percpu_counter dirty_metadata_bytes; 952 struct percpu_counter delalloc_bytes; 953 s32 dirty_metadata_batch; 954 s32 delalloc_batch; 955 956 struct list_head dirty_cowonly_roots; 957 958 struct btrfs_fs_devices *fs_devices; 959 960 /* 961 * the space_info list is almost entirely read only. It only changes 962 * when we add a new raid type to the FS, and that happens 963 * very rarely. RCU is used to protect it. 964 */ 965 struct list_head space_info; 966 967 struct btrfs_space_info *data_sinfo; 968 969 struct reloc_control *reloc_ctl; 970 971 /* data_alloc_cluster is only used in ssd mode */ 972 struct btrfs_free_cluster data_alloc_cluster; 973 974 /* all metadata allocations go through this cluster */ 975 struct btrfs_free_cluster meta_alloc_cluster; 976 977 /* auto defrag inodes go here */ 978 spinlock_t defrag_inodes_lock; 979 struct rb_root defrag_inodes; 980 atomic_t defrag_running; 981 982 /* Used to protect avail_{data, metadata, system}_alloc_bits */ 983 seqlock_t profiles_lock; 984 /* 985 * these three are in extended format (availability of single 986 * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other 987 * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) 988 */ 989 u64 avail_data_alloc_bits; 990 u64 avail_metadata_alloc_bits; 991 u64 avail_system_alloc_bits; 992 993 /* restriper state */ 994 spinlock_t balance_lock; 995 struct mutex balance_mutex; 996 atomic_t balance_running; 997 atomic_t balance_pause_req; 998 atomic_t balance_cancel_req; 999 struct btrfs_balance_control *balance_ctl; 1000 wait_queue_head_t balance_wait_q; 1001 1002 unsigned data_chunk_allocations; 1003 unsigned metadata_ratio; 1004 1005 void *bdev_holder; 1006 1007 /* private scrub information */ 1008 struct mutex scrub_lock; 1009 atomic_t scrubs_running; 1010 atomic_t scrub_pause_req; 1011 atomic_t scrubs_paused; 1012 atomic_t scrub_cancel_req; 1013 wait_queue_head_t scrub_pause_wait; 1014 int scrub_workers_refcnt; 1015 struct btrfs_workqueue *scrub_workers; 1016 struct btrfs_workqueue *scrub_wr_completion_workers; 1017 struct btrfs_workqueue *scrub_nocow_workers; 1018 struct btrfs_workqueue *scrub_parity_workers; 1019 1020 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY 1021 u32 check_integrity_print_mask; 1022 #endif 1023 /* is qgroup tracking in a consistent state? */ 1024 u64 qgroup_flags; 1025 1026 /* holds configuration and tracking. Protected by qgroup_lock */ 1027 struct rb_root qgroup_tree; 1028 struct rb_root qgroup_op_tree; 1029 spinlock_t qgroup_lock; 1030 spinlock_t qgroup_op_lock; 1031 atomic_t qgroup_op_seq; 1032 1033 /* 1034 * used to avoid frequently calling ulist_alloc()/ulist_free() 1035 * when doing qgroup accounting, it must be protected by qgroup_lock. 1036 */ 1037 struct ulist *qgroup_ulist; 1038 1039 /* protect user change for quota operations */ 1040 struct mutex qgroup_ioctl_lock; 1041 1042 /* list of dirty qgroups to be written at next commit */ 1043 struct list_head dirty_qgroups; 1044 1045 /* used by qgroup for an efficient tree traversal */ 1046 u64 qgroup_seq; 1047 1048 /* qgroup rescan items */ 1049 struct mutex qgroup_rescan_lock; /* protects the progress item */ 1050 struct btrfs_key qgroup_rescan_progress; 1051 struct btrfs_workqueue *qgroup_rescan_workers; 1052 struct completion qgroup_rescan_completion; 1053 struct btrfs_work qgroup_rescan_work; 1054 bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ 1055 1056 /* filesystem state */ 1057 unsigned long fs_state; 1058 1059 struct btrfs_delayed_root *delayed_root; 1060 1061 /* readahead tree */ 1062 spinlock_t reada_lock; 1063 struct radix_tree_root reada_tree; 1064 1065 /* readahead works cnt */ 1066 atomic_t reada_works_cnt; 1067 1068 /* Extent buffer radix tree */ 1069 spinlock_t buffer_lock; 1070 struct radix_tree_root buffer_radix; 1071 1072 /* next backup root to be overwritten */ 1073 int backup_root_index; 1074 1075 int num_tolerated_disk_barrier_failures; 1076 1077 /* device replace state */ 1078 struct btrfs_dev_replace dev_replace; 1079 1080 struct percpu_counter bio_counter; 1081 wait_queue_head_t replace_wait; 1082 1083 struct semaphore uuid_tree_rescan_sem; 1084 1085 /* Used to reclaim the metadata space in the background. */ 1086 struct work_struct async_reclaim_work; 1087 1088 spinlock_t unused_bgs_lock; 1089 struct list_head unused_bgs; 1090 struct mutex unused_bg_unpin_mutex; 1091 struct mutex delete_unused_bgs_mutex; 1092 1093 /* For btrfs to record security options */ 1094 struct security_mnt_opts security_opts; 1095 1096 /* 1097 * Chunks that can't be freed yet (under a trim/discard operation) 1098 * and will be latter freed. Protected by fs_info->chunk_mutex. 1099 */ 1100 struct list_head pinned_chunks; 1101 1102 /* Cached block sizes */ 1103 u32 nodesize; 1104 u32 sectorsize; 1105 u32 stripesize; 1106 }; 1107 1108 static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) 1109 { 1110 return sb->s_fs_info; 1111 } 1112 1113 struct btrfs_subvolume_writers { 1114 struct percpu_counter counter; 1115 wait_queue_head_t wait; 1116 }; 1117 1118 /* 1119 * The state of btrfs root 1120 */ 1121 /* 1122 * btrfs_record_root_in_trans is a multi-step process, 1123 * and it can race with the balancing code. But the 1124 * race is very small, and only the first time the root 1125 * is added to each transaction. So IN_TRANS_SETUP 1126 * is used to tell us when more checks are required 1127 */ 1128 #define BTRFS_ROOT_IN_TRANS_SETUP 0 1129 #define BTRFS_ROOT_REF_COWS 1 1130 #define BTRFS_ROOT_TRACK_DIRTY 2 1131 #define BTRFS_ROOT_IN_RADIX 3 1132 #define BTRFS_ROOT_ORPHAN_ITEM_INSERTED 4 1133 #define BTRFS_ROOT_DEFRAG_RUNNING 5 1134 #define BTRFS_ROOT_FORCE_COW 6 1135 #define BTRFS_ROOT_MULTI_LOG_TASKS 7 1136 #define BTRFS_ROOT_DIRTY 8 1137 1138 /* 1139 * in ram representation of the tree. extent_root is used for all allocations 1140 * and for the extent tree extent_root root. 1141 */ 1142 struct btrfs_root { 1143 struct extent_buffer *node; 1144 1145 struct extent_buffer *commit_root; 1146 struct btrfs_root *log_root; 1147 struct btrfs_root *reloc_root; 1148 1149 unsigned long state; 1150 struct btrfs_root_item root_item; 1151 struct btrfs_key root_key; 1152 struct btrfs_fs_info *fs_info; 1153 struct extent_io_tree dirty_log_pages; 1154 1155 struct mutex objectid_mutex; 1156 1157 spinlock_t accounting_lock; 1158 struct btrfs_block_rsv *block_rsv; 1159 1160 /* free ino cache stuff */ 1161 struct btrfs_free_space_ctl *free_ino_ctl; 1162 enum btrfs_caching_type ino_cache_state; 1163 spinlock_t ino_cache_lock; 1164 wait_queue_head_t ino_cache_wait; 1165 struct btrfs_free_space_ctl *free_ino_pinned; 1166 u64 ino_cache_progress; 1167 struct inode *ino_cache_inode; 1168 1169 struct mutex log_mutex; 1170 wait_queue_head_t log_writer_wait; 1171 wait_queue_head_t log_commit_wait[2]; 1172 struct list_head log_ctxs[2]; 1173 atomic_t log_writers; 1174 atomic_t log_commit[2]; 1175 atomic_t log_batch; 1176 int log_transid; 1177 /* No matter the commit succeeds or not*/ 1178 int log_transid_committed; 1179 /* Just be updated when the commit succeeds. */ 1180 int last_log_commit; 1181 pid_t log_start_pid; 1182 1183 u64 objectid; 1184 u64 last_trans; 1185 1186 u32 type; 1187 1188 u64 highest_objectid; 1189 1190 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 1191 /* only used with CONFIG_BTRFS_FS_RUN_SANITY_TESTS is enabled */ 1192 u64 alloc_bytenr; 1193 #endif 1194 1195 u64 defrag_trans_start; 1196 struct btrfs_key defrag_progress; 1197 struct btrfs_key defrag_max; 1198 char *name; 1199 1200 /* the dirty list is only used by non-reference counted roots */ 1201 struct list_head dirty_list; 1202 1203 struct list_head root_list; 1204 1205 spinlock_t log_extents_lock[2]; 1206 struct list_head logged_list[2]; 1207 1208 spinlock_t orphan_lock; 1209 atomic_t orphan_inodes; 1210 struct btrfs_block_rsv *orphan_block_rsv; 1211 int orphan_cleanup_state; 1212 1213 spinlock_t inode_lock; 1214 /* red-black tree that keeps track of in-memory inodes */ 1215 struct rb_root inode_tree; 1216 1217 /* 1218 * radix tree that keeps track of delayed nodes of every inode, 1219 * protected by inode_lock 1220 */ 1221 struct radix_tree_root delayed_nodes_tree; 1222 /* 1223 * right now this just gets used so that a root has its own devid 1224 * for stat. It may be used for more later 1225 */ 1226 dev_t anon_dev; 1227 1228 spinlock_t root_item_lock; 1229 refcount_t refs; 1230 1231 struct mutex delalloc_mutex; 1232 spinlock_t delalloc_lock; 1233 /* 1234 * all of the inodes that have delalloc bytes. It is possible for 1235 * this list to be empty even when there is still dirty data=ordered 1236 * extents waiting to finish IO. 1237 */ 1238 struct list_head delalloc_inodes; 1239 struct list_head delalloc_root; 1240 u64 nr_delalloc_inodes; 1241 1242 struct mutex ordered_extent_mutex; 1243 /* 1244 * this is used by the balancing code to wait for all the pending 1245 * ordered extents 1246 */ 1247 spinlock_t ordered_extent_lock; 1248 1249 /* 1250 * all of the data=ordered extents pending writeback 1251 * these can span multiple transactions and basically include 1252 * every dirty data page that isn't from nodatacow 1253 */ 1254 struct list_head ordered_extents; 1255 struct list_head ordered_root; 1256 u64 nr_ordered_extents; 1257 1258 /* 1259 * Number of currently running SEND ioctls to prevent 1260 * manipulation with the read-only status via SUBVOL_SETFLAGS 1261 */ 1262 int send_in_progress; 1263 struct btrfs_subvolume_writers *subv_writers; 1264 atomic_t will_be_snapshoted; 1265 1266 /* For qgroup metadata space reserve */ 1267 atomic64_t qgroup_meta_rsv; 1268 }; 1269 1270 static inline u32 btrfs_inode_sectorsize(const struct inode *inode) 1271 { 1272 return btrfs_sb(inode->i_sb)->sectorsize; 1273 } 1274 1275 static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) 1276 { 1277 1278 return info->nodesize - sizeof(struct btrfs_header); 1279 } 1280 1281 #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) 1282 1283 static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) 1284 { 1285 return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); 1286 } 1287 1288 static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) 1289 { 1290 return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); 1291 } 1292 1293 #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ 1294 (offsetof(struct btrfs_file_extent_item, disk_bytenr)) 1295 static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) 1296 { 1297 return BTRFS_MAX_ITEM_SIZE(info) - 1298 BTRFS_FILE_EXTENT_INLINE_DATA_START; 1299 } 1300 1301 static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) 1302 { 1303 return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); 1304 } 1305 1306 /* 1307 * Flags for mount options. 1308 * 1309 * Note: don't forget to add new options to btrfs_show_options() 1310 */ 1311 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1312 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1313 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1314 #define BTRFS_MOUNT_SSD (1 << 3) 1315 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1316 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1317 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1318 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1319 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1320 #define BTRFS_MOUNT_NOSSD (1 << 9) 1321 #define BTRFS_MOUNT_DISCARD (1 << 10) 1322 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1323 #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) 1324 #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) 1325 #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) 1326 #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) 1327 #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) 1328 #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) 1329 #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) 1330 #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) 1331 #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) 1332 #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) 1333 #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) 1334 #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) 1335 #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) 1336 #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) 1337 #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) 1338 #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) 1339 1340 #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) 1341 #define BTRFS_DEFAULT_MAX_INLINE (2048) 1342 1343 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1344 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1345 #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) 1346 #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ 1347 BTRFS_MOUNT_##opt) 1348 1349 #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ 1350 { \ 1351 if (!btrfs_test_opt(fs_info, opt)) \ 1352 btrfs_info(fs_info, fmt, ##args); \ 1353 btrfs_set_opt(fs_info->mount_opt, opt); \ 1354 } 1355 1356 #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ 1357 { \ 1358 if (btrfs_test_opt(fs_info, opt)) \ 1359 btrfs_info(fs_info, fmt, ##args); \ 1360 btrfs_clear_opt(fs_info->mount_opt, opt); \ 1361 } 1362 1363 #ifdef CONFIG_BTRFS_DEBUG 1364 static inline int 1365 btrfs_should_fragment_free_space(struct btrfs_block_group_cache *block_group) 1366 { 1367 struct btrfs_fs_info *fs_info = block_group->fs_info; 1368 1369 return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) && 1370 block_group->flags & BTRFS_BLOCK_GROUP_METADATA) || 1371 (btrfs_test_opt(fs_info, FRAGMENT_DATA) && 1372 block_group->flags & BTRFS_BLOCK_GROUP_DATA); 1373 } 1374 #endif 1375 1376 /* 1377 * Requests for changes that need to be done during transaction commit. 1378 * 1379 * Internal mount options that are used for special handling of the real 1380 * mount options (eg. cannot be set during remount and have to be set during 1381 * transaction commit) 1382 */ 1383 1384 #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) 1385 #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) 1386 #define BTRFS_PENDING_COMMIT (2) 1387 1388 #define btrfs_test_pending(info, opt) \ 1389 test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1390 #define btrfs_set_pending(info, opt) \ 1391 set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1392 #define btrfs_clear_pending(info, opt) \ 1393 clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) 1394 1395 /* 1396 * Helpers for setting pending mount option changes. 1397 * 1398 * Expects corresponding macros 1399 * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name 1400 */ 1401 #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ 1402 do { \ 1403 if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1404 btrfs_info((info), fmt, ##args); \ 1405 btrfs_set_pending((info), SET_##opt); \ 1406 btrfs_clear_pending((info), CLEAR_##opt); \ 1407 } \ 1408 } while(0) 1409 1410 #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ 1411 do { \ 1412 if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ 1413 btrfs_info((info), fmt, ##args); \ 1414 btrfs_set_pending((info), CLEAR_##opt); \ 1415 btrfs_clear_pending((info), SET_##opt); \ 1416 } \ 1417 } while(0) 1418 1419 /* 1420 * Inode flags 1421 */ 1422 #define BTRFS_INODE_NODATASUM (1 << 0) 1423 #define BTRFS_INODE_NODATACOW (1 << 1) 1424 #define BTRFS_INODE_READONLY (1 << 2) 1425 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1426 #define BTRFS_INODE_PREALLOC (1 << 4) 1427 #define BTRFS_INODE_SYNC (1 << 5) 1428 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1429 #define BTRFS_INODE_APPEND (1 << 7) 1430 #define BTRFS_INODE_NODUMP (1 << 8) 1431 #define BTRFS_INODE_NOATIME (1 << 9) 1432 #define BTRFS_INODE_DIRSYNC (1 << 10) 1433 #define BTRFS_INODE_COMPRESS (1 << 11) 1434 1435 #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) 1436 1437 struct btrfs_map_token { 1438 struct extent_buffer *eb; 1439 char *kaddr; 1440 unsigned long offset; 1441 }; 1442 1443 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ 1444 ((bytes) >> (fs_info)->sb->s_blocksize_bits) 1445 1446 static inline void btrfs_init_map_token (struct btrfs_map_token *token) 1447 { 1448 token->kaddr = NULL; 1449 } 1450 1451 /* some macros to generate set/get functions for the struct fields. This 1452 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1453 * one for u8: 1454 */ 1455 #define le8_to_cpu(v) (v) 1456 #define cpu_to_le8(v) (v) 1457 #define __le8 u8 1458 1459 #define read_eb_member(eb, ptr, type, member, result) (\ 1460 read_extent_buffer(eb, (char *)(result), \ 1461 ((unsigned long)(ptr)) + \ 1462 offsetof(type, member), \ 1463 sizeof(((type *)0)->member))) 1464 1465 #define write_eb_member(eb, ptr, type, member, result) (\ 1466 write_extent_buffer(eb, (char *)(result), \ 1467 ((unsigned long)(ptr)) + \ 1468 offsetof(type, member), \ 1469 sizeof(((type *)0)->member))) 1470 1471 #define DECLARE_BTRFS_SETGET_BITS(bits) \ 1472 u##bits btrfs_get_token_##bits(struct extent_buffer *eb, void *ptr, \ 1473 unsigned long off, \ 1474 struct btrfs_map_token *token); \ 1475 void btrfs_set_token_##bits(struct extent_buffer *eb, void *ptr, \ 1476 unsigned long off, u##bits val, \ 1477 struct btrfs_map_token *token); \ 1478 static inline u##bits btrfs_get_##bits(struct extent_buffer *eb, void *ptr, \ 1479 unsigned long off) \ 1480 { \ 1481 return btrfs_get_token_##bits(eb, ptr, off, NULL); \ 1482 } \ 1483 static inline void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ 1484 unsigned long off, u##bits val) \ 1485 { \ 1486 btrfs_set_token_##bits(eb, ptr, off, val, NULL); \ 1487 } 1488 1489 DECLARE_BTRFS_SETGET_BITS(8) 1490 DECLARE_BTRFS_SETGET_BITS(16) 1491 DECLARE_BTRFS_SETGET_BITS(32) 1492 DECLARE_BTRFS_SETGET_BITS(64) 1493 1494 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1495 static inline u##bits btrfs_##name(struct extent_buffer *eb, type *s) \ 1496 { \ 1497 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1498 return btrfs_get_##bits(eb, s, offsetof(type, member)); \ 1499 } \ 1500 static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ 1501 u##bits val) \ 1502 { \ 1503 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1504 btrfs_set_##bits(eb, s, offsetof(type, member), val); \ 1505 } \ 1506 static inline u##bits btrfs_token_##name(struct extent_buffer *eb, type *s, \ 1507 struct btrfs_map_token *token) \ 1508 { \ 1509 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1510 return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ 1511 } \ 1512 static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ 1513 type *s, u##bits val, \ 1514 struct btrfs_map_token *token) \ 1515 { \ 1516 BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ 1517 btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ 1518 } 1519 1520 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1521 static inline u##bits btrfs_##name(struct extent_buffer *eb) \ 1522 { \ 1523 type *p = page_address(eb->pages[0]); \ 1524 u##bits res = le##bits##_to_cpu(p->member); \ 1525 return res; \ 1526 } \ 1527 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1528 u##bits val) \ 1529 { \ 1530 type *p = page_address(eb->pages[0]); \ 1531 p->member = cpu_to_le##bits(val); \ 1532 } 1533 1534 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1535 static inline u##bits btrfs_##name(type *s) \ 1536 { \ 1537 return le##bits##_to_cpu(s->member); \ 1538 } \ 1539 static inline void btrfs_set_##name(type *s, u##bits val) \ 1540 { \ 1541 s->member = cpu_to_le##bits(val); \ 1542 } 1543 1544 1545 static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, 1546 struct btrfs_dev_item *s) 1547 { 1548 BUILD_BUG_ON(sizeof(u64) != 1549 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1550 return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, 1551 total_bytes)); 1552 } 1553 static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, 1554 struct btrfs_dev_item *s, 1555 u64 val) 1556 { 1557 BUILD_BUG_ON(sizeof(u64) != 1558 sizeof(((struct btrfs_dev_item *)0))->total_bytes); 1559 WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); 1560 btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); 1561 } 1562 1563 1564 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1565 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1566 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1567 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1568 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1569 start_offset, 64); 1570 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1571 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1572 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1573 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1574 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1575 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1576 1577 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1578 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1579 total_bytes, 64); 1580 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1581 bytes_used, 64); 1582 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1583 io_align, 32); 1584 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1585 io_width, 32); 1586 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1587 sector_size, 32); 1588 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1589 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1590 dev_group, 32); 1591 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1592 seek_speed, 8); 1593 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1594 bandwidth, 8); 1595 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1596 generation, 64); 1597 1598 static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) 1599 { 1600 return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); 1601 } 1602 1603 static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) 1604 { 1605 return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); 1606 } 1607 1608 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1609 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1610 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1611 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1612 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1613 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1614 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1615 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1616 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1617 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1618 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1619 1620 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1621 { 1622 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1623 } 1624 1625 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1626 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1627 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1628 stripe_len, 64); 1629 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1630 io_align, 32); 1631 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1632 io_width, 32); 1633 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1634 sector_size, 32); 1635 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1636 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1637 num_stripes, 16); 1638 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1639 sub_stripes, 16); 1640 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1641 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1642 1643 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1644 int nr) 1645 { 1646 unsigned long offset = (unsigned long)c; 1647 offset += offsetof(struct btrfs_chunk, stripe); 1648 offset += nr * sizeof(struct btrfs_stripe); 1649 return (struct btrfs_stripe *)offset; 1650 } 1651 1652 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1653 { 1654 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1655 } 1656 1657 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1658 struct btrfs_chunk *c, int nr) 1659 { 1660 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1661 } 1662 1663 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1664 struct btrfs_chunk *c, int nr) 1665 { 1666 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1667 } 1668 1669 /* struct btrfs_block_group_item */ 1670 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1671 used, 64); 1672 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1673 used, 64); 1674 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1675 struct btrfs_block_group_item, chunk_objectid, 64); 1676 1677 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1678 struct btrfs_block_group_item, chunk_objectid, 64); 1679 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1680 struct btrfs_block_group_item, flags, 64); 1681 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1682 struct btrfs_block_group_item, flags, 64); 1683 1684 /* struct btrfs_free_space_info */ 1685 BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, 1686 extent_count, 32); 1687 BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); 1688 1689 /* struct btrfs_inode_ref */ 1690 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1691 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1692 1693 /* struct btrfs_inode_extref */ 1694 BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, 1695 parent_objectid, 64); 1696 BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, 1697 name_len, 16); 1698 BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); 1699 1700 /* struct btrfs_inode_item */ 1701 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1702 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1703 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1704 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1705 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1706 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1707 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1708 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1709 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1710 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1711 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1712 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1713 BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, 1714 generation, 64); 1715 BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, 1716 sequence, 64); 1717 BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, 1718 transid, 64); 1719 BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); 1720 BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, 1721 nbytes, 64); 1722 BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, 1723 block_group, 64); 1724 BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); 1725 BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); 1726 BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); 1727 BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); 1728 BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); 1729 BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); 1730 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1731 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1732 BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); 1733 BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); 1734 1735 /* struct btrfs_dev_extent */ 1736 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1737 chunk_tree, 64); 1738 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1739 chunk_objectid, 64); 1740 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1741 chunk_offset, 64); 1742 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1743 1744 static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1745 { 1746 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1747 return (unsigned long)dev + ptr; 1748 } 1749 1750 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1751 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1752 generation, 64); 1753 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1754 1755 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1756 1757 1758 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1759 1760 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1761 struct btrfs_tree_block_info *item, 1762 struct btrfs_disk_key *key) 1763 { 1764 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1765 } 1766 1767 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1768 struct btrfs_tree_block_info *item, 1769 struct btrfs_disk_key *key) 1770 { 1771 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1772 } 1773 1774 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1775 root, 64); 1776 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1777 objectid, 64); 1778 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1779 offset, 64); 1780 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1781 count, 32); 1782 1783 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1784 count, 32); 1785 1786 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1787 type, 8); 1788 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1789 offset, 64); 1790 1791 static inline u32 btrfs_extent_inline_ref_size(int type) 1792 { 1793 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1794 type == BTRFS_SHARED_BLOCK_REF_KEY) 1795 return sizeof(struct btrfs_extent_inline_ref); 1796 if (type == BTRFS_SHARED_DATA_REF_KEY) 1797 return sizeof(struct btrfs_shared_data_ref) + 1798 sizeof(struct btrfs_extent_inline_ref); 1799 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1800 return sizeof(struct btrfs_extent_data_ref) + 1801 offsetof(struct btrfs_extent_inline_ref, offset); 1802 BUG(); 1803 return 0; 1804 } 1805 1806 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1807 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1808 generation, 64); 1809 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1810 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1811 1812 /* struct btrfs_node */ 1813 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1814 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1815 BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, 1816 blockptr, 64); 1817 BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, 1818 generation, 64); 1819 1820 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1821 { 1822 unsigned long ptr; 1823 ptr = offsetof(struct btrfs_node, ptrs) + 1824 sizeof(struct btrfs_key_ptr) * nr; 1825 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1826 } 1827 1828 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1829 int nr, u64 val) 1830 { 1831 unsigned long ptr; 1832 ptr = offsetof(struct btrfs_node, ptrs) + 1833 sizeof(struct btrfs_key_ptr) * nr; 1834 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1835 } 1836 1837 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1838 { 1839 unsigned long ptr; 1840 ptr = offsetof(struct btrfs_node, ptrs) + 1841 sizeof(struct btrfs_key_ptr) * nr; 1842 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1843 } 1844 1845 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1846 int nr, u64 val) 1847 { 1848 unsigned long ptr; 1849 ptr = offsetof(struct btrfs_node, ptrs) + 1850 sizeof(struct btrfs_key_ptr) * nr; 1851 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1852 } 1853 1854 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1855 { 1856 return offsetof(struct btrfs_node, ptrs) + 1857 sizeof(struct btrfs_key_ptr) * nr; 1858 } 1859 1860 void btrfs_node_key(struct extent_buffer *eb, 1861 struct btrfs_disk_key *disk_key, int nr); 1862 1863 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1864 struct btrfs_disk_key *disk_key, int nr) 1865 { 1866 unsigned long ptr; 1867 ptr = btrfs_node_key_ptr_offset(nr); 1868 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1869 struct btrfs_key_ptr, key, disk_key); 1870 } 1871 1872 /* struct btrfs_item */ 1873 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1874 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1875 BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); 1876 BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); 1877 1878 static inline unsigned long btrfs_item_nr_offset(int nr) 1879 { 1880 return offsetof(struct btrfs_leaf, items) + 1881 sizeof(struct btrfs_item) * nr; 1882 } 1883 1884 static inline struct btrfs_item *btrfs_item_nr(int nr) 1885 { 1886 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1887 } 1888 1889 static inline u32 btrfs_item_end(struct extent_buffer *eb, 1890 struct btrfs_item *item) 1891 { 1892 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1893 } 1894 1895 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) 1896 { 1897 return btrfs_item_end(eb, btrfs_item_nr(nr)); 1898 } 1899 1900 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) 1901 { 1902 return btrfs_item_offset(eb, btrfs_item_nr(nr)); 1903 } 1904 1905 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) 1906 { 1907 return btrfs_item_size(eb, btrfs_item_nr(nr)); 1908 } 1909 1910 static inline void btrfs_item_key(struct extent_buffer *eb, 1911 struct btrfs_disk_key *disk_key, int nr) 1912 { 1913 struct btrfs_item *item = btrfs_item_nr(nr); 1914 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1915 } 1916 1917 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1918 struct btrfs_disk_key *disk_key, int nr) 1919 { 1920 struct btrfs_item *item = btrfs_item_nr(nr); 1921 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1922 } 1923 1924 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1925 1926 /* 1927 * struct btrfs_root_ref 1928 */ 1929 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1930 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1931 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1932 1933 /* struct btrfs_dir_item */ 1934 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1935 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1936 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1937 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1938 BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); 1939 BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, 1940 data_len, 16); 1941 BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, 1942 name_len, 16); 1943 BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, 1944 transid, 64); 1945 1946 static inline void btrfs_dir_item_key(struct extent_buffer *eb, 1947 struct btrfs_dir_item *item, 1948 struct btrfs_disk_key *key) 1949 { 1950 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1951 } 1952 1953 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1954 struct btrfs_dir_item *item, 1955 struct btrfs_disk_key *key) 1956 { 1957 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1958 } 1959 1960 BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, 1961 num_entries, 64); 1962 BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, 1963 num_bitmaps, 64); 1964 BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, 1965 generation, 64); 1966 1967 static inline void btrfs_free_space_key(struct extent_buffer *eb, 1968 struct btrfs_free_space_header *h, 1969 struct btrfs_disk_key *key) 1970 { 1971 read_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1972 } 1973 1974 static inline void btrfs_set_free_space_key(struct extent_buffer *eb, 1975 struct btrfs_free_space_header *h, 1976 struct btrfs_disk_key *key) 1977 { 1978 write_eb_member(eb, h, struct btrfs_free_space_header, location, key); 1979 } 1980 1981 /* struct btrfs_disk_key */ 1982 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1983 objectid, 64); 1984 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1985 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1986 1987 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1988 const struct btrfs_disk_key *disk) 1989 { 1990 cpu->offset = le64_to_cpu(disk->offset); 1991 cpu->type = disk->type; 1992 cpu->objectid = le64_to_cpu(disk->objectid); 1993 } 1994 1995 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1996 const struct btrfs_key *cpu) 1997 { 1998 disk->offset = cpu_to_le64(cpu->offset); 1999 disk->type = cpu->type; 2000 disk->objectid = cpu_to_le64(cpu->objectid); 2001 } 2002 2003 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, 2004 struct btrfs_key *key, int nr) 2005 { 2006 struct btrfs_disk_key disk_key; 2007 btrfs_node_key(eb, &disk_key, nr); 2008 btrfs_disk_key_to_cpu(key, &disk_key); 2009 } 2010 2011 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, 2012 struct btrfs_key *key, int nr) 2013 { 2014 struct btrfs_disk_key disk_key; 2015 btrfs_item_key(eb, &disk_key, nr); 2016 btrfs_disk_key_to_cpu(key, &disk_key); 2017 } 2018 2019 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, 2020 struct btrfs_dir_item *item, 2021 struct btrfs_key *key) 2022 { 2023 struct btrfs_disk_key disk_key; 2024 btrfs_dir_item_key(eb, item, &disk_key); 2025 btrfs_disk_key_to_cpu(key, &disk_key); 2026 } 2027 2028 static inline u8 btrfs_key_type(const struct btrfs_key *key) 2029 { 2030 return key->type; 2031 } 2032 2033 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 2034 { 2035 key->type = val; 2036 } 2037 2038 /* struct btrfs_header */ 2039 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 2040 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 2041 generation, 64); 2042 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 2043 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 2044 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 2045 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 2046 BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, 2047 generation, 64); 2048 BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); 2049 BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, 2050 nritems, 32); 2051 BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); 2052 2053 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) 2054 { 2055 return (btrfs_header_flags(eb) & flag) == flag; 2056 } 2057 2058 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 2059 { 2060 u64 flags = btrfs_header_flags(eb); 2061 btrfs_set_header_flags(eb, flags | flag); 2062 return (flags & flag) == flag; 2063 } 2064 2065 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 2066 { 2067 u64 flags = btrfs_header_flags(eb); 2068 btrfs_set_header_flags(eb, flags & ~flag); 2069 return (flags & flag) == flag; 2070 } 2071 2072 static inline int btrfs_header_backref_rev(struct extent_buffer *eb) 2073 { 2074 u64 flags = btrfs_header_flags(eb); 2075 return flags >> BTRFS_BACKREF_REV_SHIFT; 2076 } 2077 2078 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 2079 int rev) 2080 { 2081 u64 flags = btrfs_header_flags(eb); 2082 flags &= ~BTRFS_BACKREF_REV_MASK; 2083 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 2084 btrfs_set_header_flags(eb, flags); 2085 } 2086 2087 static inline unsigned long btrfs_header_fsid(void) 2088 { 2089 return offsetof(struct btrfs_header, fsid); 2090 } 2091 2092 static inline unsigned long btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) 2093 { 2094 return offsetof(struct btrfs_header, chunk_tree_uuid); 2095 } 2096 2097 static inline int btrfs_is_leaf(struct extent_buffer *eb) 2098 { 2099 return btrfs_header_level(eb) == 0; 2100 } 2101 2102 /* struct btrfs_root_item */ 2103 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 2104 generation, 64); 2105 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 2106 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 2107 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 2108 2109 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 2110 generation, 64); 2111 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 2112 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 2113 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 2114 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 2115 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 2116 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 2117 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 2118 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 2119 last_snapshot, 64); 2120 BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, 2121 generation_v2, 64); 2122 BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, 2123 ctransid, 64); 2124 BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, 2125 otransid, 64); 2126 BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, 2127 stransid, 64); 2128 BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, 2129 rtransid, 64); 2130 2131 static inline bool btrfs_root_readonly(struct btrfs_root *root) 2132 { 2133 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; 2134 } 2135 2136 static inline bool btrfs_root_dead(struct btrfs_root *root) 2137 { 2138 return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; 2139 } 2140 2141 /* struct btrfs_root_backup */ 2142 BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, 2143 tree_root, 64); 2144 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, 2145 tree_root_gen, 64); 2146 BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, 2147 tree_root_level, 8); 2148 2149 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, 2150 chunk_root, 64); 2151 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, 2152 chunk_root_gen, 64); 2153 BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, 2154 chunk_root_level, 8); 2155 2156 BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, 2157 extent_root, 64); 2158 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, 2159 extent_root_gen, 64); 2160 BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, 2161 extent_root_level, 8); 2162 2163 BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, 2164 fs_root, 64); 2165 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, 2166 fs_root_gen, 64); 2167 BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, 2168 fs_root_level, 8); 2169 2170 BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, 2171 dev_root, 64); 2172 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, 2173 dev_root_gen, 64); 2174 BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, 2175 dev_root_level, 8); 2176 2177 BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, 2178 csum_root, 64); 2179 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, 2180 csum_root_gen, 64); 2181 BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, 2182 csum_root_level, 8); 2183 BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, 2184 total_bytes, 64); 2185 BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, 2186 bytes_used, 64); 2187 BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, 2188 num_devices, 64); 2189 2190 /* struct btrfs_balance_item */ 2191 BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); 2192 2193 static inline void btrfs_balance_data(struct extent_buffer *eb, 2194 struct btrfs_balance_item *bi, 2195 struct btrfs_disk_balance_args *ba) 2196 { 2197 read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2198 } 2199 2200 static inline void btrfs_set_balance_data(struct extent_buffer *eb, 2201 struct btrfs_balance_item *bi, 2202 struct btrfs_disk_balance_args *ba) 2203 { 2204 write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); 2205 } 2206 2207 static inline void btrfs_balance_meta(struct extent_buffer *eb, 2208 struct btrfs_balance_item *bi, 2209 struct btrfs_disk_balance_args *ba) 2210 { 2211 read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2212 } 2213 2214 static inline void btrfs_set_balance_meta(struct extent_buffer *eb, 2215 struct btrfs_balance_item *bi, 2216 struct btrfs_disk_balance_args *ba) 2217 { 2218 write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); 2219 } 2220 2221 static inline void btrfs_balance_sys(struct extent_buffer *eb, 2222 struct btrfs_balance_item *bi, 2223 struct btrfs_disk_balance_args *ba) 2224 { 2225 read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2226 } 2227 2228 static inline void btrfs_set_balance_sys(struct extent_buffer *eb, 2229 struct btrfs_balance_item *bi, 2230 struct btrfs_disk_balance_args *ba) 2231 { 2232 write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); 2233 } 2234 2235 static inline void 2236 btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, 2237 struct btrfs_disk_balance_args *disk) 2238 { 2239 memset(cpu, 0, sizeof(*cpu)); 2240 2241 cpu->profiles = le64_to_cpu(disk->profiles); 2242 cpu->usage = le64_to_cpu(disk->usage); 2243 cpu->devid = le64_to_cpu(disk->devid); 2244 cpu->pstart = le64_to_cpu(disk->pstart); 2245 cpu->pend = le64_to_cpu(disk->pend); 2246 cpu->vstart = le64_to_cpu(disk->vstart); 2247 cpu->vend = le64_to_cpu(disk->vend); 2248 cpu->target = le64_to_cpu(disk->target); 2249 cpu->flags = le64_to_cpu(disk->flags); 2250 cpu->limit = le64_to_cpu(disk->limit); 2251 cpu->stripes_min = le32_to_cpu(disk->stripes_min); 2252 cpu->stripes_max = le32_to_cpu(disk->stripes_max); 2253 } 2254 2255 static inline void 2256 btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, 2257 struct btrfs_balance_args *cpu) 2258 { 2259 memset(disk, 0, sizeof(*disk)); 2260 2261 disk->profiles = cpu_to_le64(cpu->profiles); 2262 disk->usage = cpu_to_le64(cpu->usage); 2263 disk->devid = cpu_to_le64(cpu->devid); 2264 disk->pstart = cpu_to_le64(cpu->pstart); 2265 disk->pend = cpu_to_le64(cpu->pend); 2266 disk->vstart = cpu_to_le64(cpu->vstart); 2267 disk->vend = cpu_to_le64(cpu->vend); 2268 disk->target = cpu_to_le64(cpu->target); 2269 disk->flags = cpu_to_le64(cpu->flags); 2270 disk->limit = cpu_to_le64(cpu->limit); 2271 disk->stripes_min = cpu_to_le32(cpu->stripes_min); 2272 disk->stripes_max = cpu_to_le32(cpu->stripes_max); 2273 } 2274 2275 /* struct btrfs_super_block */ 2276 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 2277 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 2278 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 2279 generation, 64); 2280 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 2281 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 2282 struct btrfs_super_block, sys_chunk_array_size, 32); 2283 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 2284 struct btrfs_super_block, chunk_root_generation, 64); 2285 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 2286 root_level, 8); 2287 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 2288 chunk_root, 64); 2289 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 2290 chunk_root_level, 8); 2291 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 2292 log_root, 64); 2293 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 2294 log_root_transid, 64); 2295 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 2296 log_root_level, 8); 2297 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 2298 total_bytes, 64); 2299 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 2300 bytes_used, 64); 2301 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 2302 sectorsize, 32); 2303 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 2304 nodesize, 32); 2305 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 2306 stripesize, 32); 2307 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 2308 root_dir_objectid, 64); 2309 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 2310 num_devices, 64); 2311 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 2312 compat_flags, 64); 2313 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 2314 compat_ro_flags, 64); 2315 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 2316 incompat_flags, 64); 2317 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 2318 csum_type, 16); 2319 BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, 2320 cache_generation, 64); 2321 BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); 2322 BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, 2323 uuid_tree_generation, 64); 2324 2325 static inline int btrfs_super_csum_size(struct btrfs_super_block *s) 2326 { 2327 u16 t = btrfs_super_csum_type(s); 2328 /* 2329 * csum type is validated at mount time 2330 */ 2331 return btrfs_csum_sizes[t]; 2332 } 2333 2334 2335 /* 2336 * The leaf data grows from end-to-front in the node. 2337 * this returns the address of the start of the last item, 2338 * which is the stop of the leaf data stack 2339 */ 2340 static inline unsigned int leaf_data_end(struct btrfs_fs_info *fs_info, 2341 struct extent_buffer *leaf) 2342 { 2343 u32 nr = btrfs_header_nritems(leaf); 2344 2345 if (nr == 0) 2346 return BTRFS_LEAF_DATA_SIZE(fs_info); 2347 return btrfs_item_offset_nr(leaf, nr - 1); 2348 } 2349 2350 /* struct btrfs_file_extent_item */ 2351 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 2352 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, 2353 struct btrfs_file_extent_item, disk_bytenr, 64); 2354 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, 2355 struct btrfs_file_extent_item, offset, 64); 2356 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, 2357 struct btrfs_file_extent_item, generation, 64); 2358 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, 2359 struct btrfs_file_extent_item, num_bytes, 64); 2360 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, 2361 struct btrfs_file_extent_item, disk_num_bytes, 64); 2362 BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, 2363 struct btrfs_file_extent_item, compression, 8); 2364 2365 static inline unsigned long 2366 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) 2367 { 2368 return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; 2369 } 2370 2371 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 2372 { 2373 return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; 2374 } 2375 2376 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 2377 disk_bytenr, 64); 2378 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 2379 generation, 64); 2380 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 2381 disk_num_bytes, 64); 2382 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 2383 offset, 64); 2384 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 2385 num_bytes, 64); 2386 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 2387 ram_bytes, 64); 2388 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 2389 compression, 8); 2390 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 2391 encryption, 8); 2392 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 2393 other_encoding, 16); 2394 2395 /* 2396 * this returns the number of bytes used by the item on disk, minus the 2397 * size of any extent headers. If a file is compressed on disk, this is 2398 * the compressed size 2399 */ 2400 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, 2401 struct btrfs_item *e) 2402 { 2403 return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; 2404 } 2405 2406 /* this returns the number of file bytes represented by the inline item. 2407 * If an item is compressed, this is the uncompressed size 2408 */ 2409 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, 2410 int slot, 2411 struct btrfs_file_extent_item *fi) 2412 { 2413 struct btrfs_map_token token; 2414 2415 btrfs_init_map_token(&token); 2416 /* 2417 * return the space used on disk if this item isn't 2418 * compressed or encoded 2419 */ 2420 if (btrfs_token_file_extent_compression(eb, fi, &token) == 0 && 2421 btrfs_token_file_extent_encryption(eb, fi, &token) == 0 && 2422 btrfs_token_file_extent_other_encoding(eb, fi, &token) == 0) { 2423 return btrfs_file_extent_inline_item_len(eb, 2424 btrfs_item_nr(slot)); 2425 } 2426 2427 /* otherwise use the ram bytes field */ 2428 return btrfs_token_file_extent_ram_bytes(eb, fi, &token); 2429 } 2430 2431 2432 /* btrfs_dev_stats_item */ 2433 static inline u64 btrfs_dev_stats_value(struct extent_buffer *eb, 2434 struct btrfs_dev_stats_item *ptr, 2435 int index) 2436 { 2437 u64 val; 2438 2439 read_extent_buffer(eb, &val, 2440 offsetof(struct btrfs_dev_stats_item, values) + 2441 ((unsigned long)ptr) + (index * sizeof(u64)), 2442 sizeof(val)); 2443 return val; 2444 } 2445 2446 static inline void btrfs_set_dev_stats_value(struct extent_buffer *eb, 2447 struct btrfs_dev_stats_item *ptr, 2448 int index, u64 val) 2449 { 2450 write_extent_buffer(eb, &val, 2451 offsetof(struct btrfs_dev_stats_item, values) + 2452 ((unsigned long)ptr) + (index * sizeof(u64)), 2453 sizeof(val)); 2454 } 2455 2456 /* btrfs_qgroup_status_item */ 2457 BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, 2458 generation, 64); 2459 BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, 2460 version, 64); 2461 BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, 2462 flags, 64); 2463 BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, 2464 rescan, 64); 2465 2466 /* btrfs_qgroup_info_item */ 2467 BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, 2468 generation, 64); 2469 BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); 2470 BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, 2471 rfer_cmpr, 64); 2472 BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); 2473 BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, 2474 excl_cmpr, 64); 2475 2476 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, 2477 struct btrfs_qgroup_info_item, generation, 64); 2478 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, 2479 rfer, 64); 2480 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, 2481 struct btrfs_qgroup_info_item, rfer_cmpr, 64); 2482 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, 2483 excl, 64); 2484 BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, 2485 struct btrfs_qgroup_info_item, excl_cmpr, 64); 2486 2487 /* btrfs_qgroup_limit_item */ 2488 BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, 2489 flags, 64); 2490 BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, 2491 max_rfer, 64); 2492 BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, 2493 max_excl, 64); 2494 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, 2495 rsv_rfer, 64); 2496 BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, 2497 rsv_excl, 64); 2498 2499 /* btrfs_dev_replace_item */ 2500 BTRFS_SETGET_FUNCS(dev_replace_src_devid, 2501 struct btrfs_dev_replace_item, src_devid, 64); 2502 BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, 2503 struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, 2504 64); 2505 BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, 2506 replace_state, 64); 2507 BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, 2508 time_started, 64); 2509 BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, 2510 time_stopped, 64); 2511 BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, 2512 num_write_errors, 64); 2513 BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, 2514 struct btrfs_dev_replace_item, num_uncorrectable_read_errors, 2515 64); 2516 BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, 2517 cursor_left, 64); 2518 BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, 2519 cursor_right, 64); 2520 2521 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, 2522 struct btrfs_dev_replace_item, src_devid, 64); 2523 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, 2524 struct btrfs_dev_replace_item, 2525 cont_reading_from_srcdev_mode, 64); 2526 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, 2527 struct btrfs_dev_replace_item, replace_state, 64); 2528 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, 2529 struct btrfs_dev_replace_item, time_started, 64); 2530 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, 2531 struct btrfs_dev_replace_item, time_stopped, 64); 2532 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, 2533 struct btrfs_dev_replace_item, num_write_errors, 64); 2534 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, 2535 struct btrfs_dev_replace_item, 2536 num_uncorrectable_read_errors, 64); 2537 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, 2538 struct btrfs_dev_replace_item, cursor_left, 64); 2539 BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, 2540 struct btrfs_dev_replace_item, cursor_right, 64); 2541 2542 /* helper function to cast into the data area of the leaf. */ 2543 #define btrfs_item_ptr(leaf, slot, type) \ 2544 ((type *)(BTRFS_LEAF_DATA_OFFSET + \ 2545 btrfs_item_offset_nr(leaf, slot))) 2546 2547 #define btrfs_item_ptr_offset(leaf, slot) \ 2548 ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ 2549 btrfs_item_offset_nr(leaf, slot))) 2550 2551 static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) 2552 { 2553 return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && 2554 (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); 2555 } 2556 2557 static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) 2558 { 2559 return mapping_gfp_constraint(mapping, ~__GFP_FS); 2560 } 2561 2562 /* extent-tree.c */ 2563 2564 u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); 2565 2566 static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_fs_info *fs_info, 2567 unsigned num_items) 2568 { 2569 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; 2570 } 2571 2572 /* 2573 * Doing a truncate won't result in new nodes or leaves, just what we need for 2574 * COW. 2575 */ 2576 static inline u64 btrfs_calc_trunc_metadata_size(struct btrfs_fs_info *fs_info, 2577 unsigned num_items) 2578 { 2579 return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; 2580 } 2581 2582 int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans, 2583 struct btrfs_fs_info *fs_info); 2584 int btrfs_check_space_for_delayed_refs(struct btrfs_trans_handle *trans, 2585 struct btrfs_fs_info *fs_info); 2586 void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info, 2587 const u64 start); 2588 void btrfs_wait_block_group_reservations(struct btrfs_block_group_cache *bg); 2589 bool btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2590 void btrfs_dec_nocow_writers(struct btrfs_fs_info *fs_info, u64 bytenr); 2591 void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg); 2592 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2593 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 2594 struct btrfs_fs_info *fs_info, unsigned long count); 2595 int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info, 2596 unsigned long count, u64 transid, int wait); 2597 int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); 2598 int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, 2599 struct btrfs_fs_info *fs_info, u64 bytenr, 2600 u64 offset, int metadata, u64 *refs, u64 *flags); 2601 int btrfs_pin_extent(struct btrfs_fs_info *fs_info, 2602 u64 bytenr, u64 num, int reserved); 2603 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, 2604 u64 bytenr, u64 num_bytes); 2605 int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info, 2606 struct extent_buffer *eb); 2607 int btrfs_cross_ref_exist(struct btrfs_root *root, 2608 u64 objectid, u64 offset, u64 bytenr); 2609 struct btrfs_block_group_cache *btrfs_lookup_block_group( 2610 struct btrfs_fs_info *info, 2611 u64 bytenr); 2612 void btrfs_get_block_group(struct btrfs_block_group_cache *cache); 2613 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 2614 int get_block_group_index(struct btrfs_block_group_cache *cache); 2615 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, 2616 struct btrfs_root *root, 2617 u64 parent, u64 root_objectid, 2618 const struct btrfs_disk_key *key, 2619 int level, u64 hint, 2620 u64 empty_size); 2621 void btrfs_free_tree_block(struct btrfs_trans_handle *trans, 2622 struct btrfs_root *root, 2623 struct extent_buffer *buf, 2624 u64 parent, int last_ref); 2625 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 2626 u64 root_objectid, u64 owner, 2627 u64 offset, u64 ram_bytes, 2628 struct btrfs_key *ins); 2629 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2630 struct btrfs_fs_info *fs_info, 2631 u64 root_objectid, u64 owner, u64 offset, 2632 struct btrfs_key *ins); 2633 int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, 2634 u64 min_alloc_size, u64 empty_size, u64 hint_byte, 2635 struct btrfs_key *ins, int is_data, int delalloc); 2636 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2637 struct extent_buffer *buf, int full_backref); 2638 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2639 struct extent_buffer *buf, int full_backref); 2640 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2641 struct btrfs_fs_info *fs_info, 2642 u64 bytenr, u64 num_bytes, u64 flags, 2643 int level, int is_data); 2644 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2645 struct btrfs_fs_info *fs_info, 2646 u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid, 2647 u64 owner, u64 offset); 2648 2649 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, 2650 u64 start, u64 len, int delalloc); 2651 int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, 2652 u64 start, u64 len); 2653 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); 2654 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2655 struct btrfs_fs_info *fs_info); 2656 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2657 struct btrfs_fs_info *fs_info, 2658 u64 bytenr, u64 num_bytes, u64 parent, 2659 u64 root_objectid, u64 owner, u64 offset); 2660 2661 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans, 2662 struct btrfs_fs_info *fs_info); 2663 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2664 struct btrfs_fs_info *fs_info); 2665 int btrfs_setup_space_cache(struct btrfs_trans_handle *trans, 2666 struct btrfs_fs_info *fs_info); 2667 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); 2668 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2669 int btrfs_read_block_groups(struct btrfs_fs_info *info); 2670 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr); 2671 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2672 struct btrfs_fs_info *fs_info, u64 bytes_used, 2673 u64 type, u64 chunk_objectid, u64 chunk_offset, 2674 u64 size); 2675 struct btrfs_trans_handle *btrfs_start_trans_remove_block_group( 2676 struct btrfs_fs_info *fs_info, 2677 const u64 chunk_offset); 2678 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2679 struct btrfs_fs_info *fs_info, u64 group_start, 2680 struct extent_map *em); 2681 void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info); 2682 void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); 2683 void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); 2684 void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans, 2685 struct btrfs_fs_info *fs_info); 2686 u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info); 2687 u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info); 2688 u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info); 2689 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2690 2691 enum btrfs_reserve_flush_enum { 2692 /* If we are in the transaction, we can't flush anything.*/ 2693 BTRFS_RESERVE_NO_FLUSH, 2694 /* 2695 * Flushing delalloc may cause deadlock somewhere, in this 2696 * case, use FLUSH LIMIT 2697 */ 2698 BTRFS_RESERVE_FLUSH_LIMIT, 2699 BTRFS_RESERVE_FLUSH_ALL, 2700 }; 2701 2702 enum btrfs_flush_state { 2703 FLUSH_DELAYED_ITEMS_NR = 1, 2704 FLUSH_DELAYED_ITEMS = 2, 2705 FLUSH_DELALLOC = 3, 2706 FLUSH_DELALLOC_WAIT = 4, 2707 ALLOC_CHUNK = 5, 2708 COMMIT_TRANS = 6, 2709 }; 2710 2711 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes); 2712 int btrfs_check_data_free_space(struct inode *inode, 2713 struct extent_changeset **reserved, u64 start, u64 len); 2714 void btrfs_free_reserved_data_space(struct inode *inode, 2715 struct extent_changeset *reserved, u64 start, u64 len); 2716 void btrfs_delalloc_release_space(struct inode *inode, 2717 struct extent_changeset *reserved, u64 start, u64 len); 2718 void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start, 2719 u64 len); 2720 void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, 2721 struct btrfs_fs_info *fs_info); 2722 void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); 2723 int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, 2724 struct btrfs_inode *inode); 2725 void btrfs_orphan_release_metadata(struct btrfs_inode *inode); 2726 int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, 2727 struct btrfs_block_rsv *rsv, 2728 int nitems, 2729 u64 *qgroup_reserved, bool use_global_rsv); 2730 void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, 2731 struct btrfs_block_rsv *rsv); 2732 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); 2733 void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes); 2734 int btrfs_delalloc_reserve_space(struct inode *inode, 2735 struct extent_changeset **reserved, u64 start, u64 len); 2736 void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv, unsigned short type); 2737 struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_fs_info *fs_info, 2738 unsigned short type); 2739 void btrfs_free_block_rsv(struct btrfs_fs_info *fs_info, 2740 struct btrfs_block_rsv *rsv); 2741 void __btrfs_free_block_rsv(struct btrfs_block_rsv *rsv); 2742 int btrfs_block_rsv_add(struct btrfs_root *root, 2743 struct btrfs_block_rsv *block_rsv, u64 num_bytes, 2744 enum btrfs_reserve_flush_enum flush); 2745 int btrfs_block_rsv_check(struct btrfs_block_rsv *block_rsv, int min_factor); 2746 int btrfs_block_rsv_refill(struct btrfs_root *root, 2747 struct btrfs_block_rsv *block_rsv, u64 min_reserved, 2748 enum btrfs_reserve_flush_enum flush); 2749 int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, 2750 struct btrfs_block_rsv *dst_rsv, u64 num_bytes, 2751 int update_size); 2752 int btrfs_cond_migrate_bytes(struct btrfs_fs_info *fs_info, 2753 struct btrfs_block_rsv *dest, u64 num_bytes, 2754 int min_factor); 2755 void btrfs_block_rsv_release(struct btrfs_fs_info *fs_info, 2756 struct btrfs_block_rsv *block_rsv, 2757 u64 num_bytes); 2758 int btrfs_inc_block_group_ro(struct btrfs_fs_info *fs_info, 2759 struct btrfs_block_group_cache *cache); 2760 void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache); 2761 void btrfs_put_block_group_cache(struct btrfs_fs_info *info); 2762 u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); 2763 int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, 2764 u64 start, u64 end); 2765 int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, 2766 u64 num_bytes, u64 *actual_bytes); 2767 int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, 2768 struct btrfs_fs_info *fs_info, u64 type); 2769 int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); 2770 2771 int btrfs_init_space_info(struct btrfs_fs_info *fs_info); 2772 int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, 2773 struct btrfs_fs_info *fs_info); 2774 int __get_raid_index(u64 flags); 2775 int btrfs_start_write_no_snapshoting(struct btrfs_root *root); 2776 void btrfs_end_write_no_snapshoting(struct btrfs_root *root); 2777 void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); 2778 void check_system_chunk(struct btrfs_trans_handle *trans, 2779 struct btrfs_fs_info *fs_info, const u64 type); 2780 u64 add_new_free_space(struct btrfs_block_group_cache *block_group, 2781 struct btrfs_fs_info *info, u64 start, u64 end); 2782 2783 /* ctree.c */ 2784 int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, 2785 int level, int *slot); 2786 int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); 2787 int btrfs_previous_item(struct btrfs_root *root, 2788 struct btrfs_path *path, u64 min_objectid, 2789 int type); 2790 int btrfs_previous_extent_item(struct btrfs_root *root, 2791 struct btrfs_path *path, u64 min_objectid); 2792 void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, 2793 struct btrfs_path *path, 2794 const struct btrfs_key *new_key); 2795 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2796 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2797 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2798 struct btrfs_key *key, int lowest_level, 2799 u64 min_trans); 2800 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2801 struct btrfs_path *path, 2802 u64 min_trans); 2803 enum btrfs_compare_tree_result { 2804 BTRFS_COMPARE_TREE_NEW, 2805 BTRFS_COMPARE_TREE_DELETED, 2806 BTRFS_COMPARE_TREE_CHANGED, 2807 BTRFS_COMPARE_TREE_SAME, 2808 }; 2809 typedef int (*btrfs_changed_cb_t)(struct btrfs_root *left_root, 2810 struct btrfs_root *right_root, 2811 struct btrfs_path *left_path, 2812 struct btrfs_path *right_path, 2813 struct btrfs_key *key, 2814 enum btrfs_compare_tree_result result, 2815 void *ctx); 2816 int btrfs_compare_trees(struct btrfs_root *left_root, 2817 struct btrfs_root *right_root, 2818 btrfs_changed_cb_t cb, void *ctx); 2819 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2820 struct btrfs_root *root, struct extent_buffer *buf, 2821 struct extent_buffer *parent, int parent_slot, 2822 struct extent_buffer **cow_ret); 2823 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2824 struct btrfs_root *root, 2825 struct extent_buffer *buf, 2826 struct extent_buffer **cow_ret, u64 new_root_objectid); 2827 int btrfs_block_can_be_shared(struct btrfs_root *root, 2828 struct extent_buffer *buf); 2829 void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path, 2830 u32 data_size); 2831 void btrfs_truncate_item(struct btrfs_fs_info *fs_info, 2832 struct btrfs_path *path, u32 new_size, int from_end); 2833 int btrfs_split_item(struct btrfs_trans_handle *trans, 2834 struct btrfs_root *root, 2835 struct btrfs_path *path, 2836 const struct btrfs_key *new_key, 2837 unsigned long split_offset); 2838 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2839 struct btrfs_root *root, 2840 struct btrfs_path *path, 2841 const struct btrfs_key *new_key); 2842 int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, 2843 u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); 2844 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2845 const struct btrfs_key *key, struct btrfs_path *p, 2846 int ins_len, int cow); 2847 int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, 2848 struct btrfs_path *p, u64 time_seq); 2849 int btrfs_search_slot_for_read(struct btrfs_root *root, 2850 const struct btrfs_key *key, 2851 struct btrfs_path *p, int find_higher, 2852 int return_any); 2853 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2854 struct btrfs_root *root, struct extent_buffer *parent, 2855 int start_slot, u64 *last_ret, 2856 struct btrfs_key *progress); 2857 void btrfs_release_path(struct btrfs_path *p); 2858 struct btrfs_path *btrfs_alloc_path(void); 2859 void btrfs_free_path(struct btrfs_path *p); 2860 void btrfs_set_path_blocking(struct btrfs_path *p); 2861 void btrfs_clear_path_blocking(struct btrfs_path *p, 2862 struct extent_buffer *held, int held_rw); 2863 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2864 2865 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2866 struct btrfs_path *path, int slot, int nr); 2867 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2868 struct btrfs_root *root, 2869 struct btrfs_path *path) 2870 { 2871 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2872 } 2873 2874 void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, 2875 const struct btrfs_key *cpu_key, u32 *data_size, 2876 u32 total_data, u32 total_size, int nr); 2877 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2878 const struct btrfs_key *key, void *data, u32 data_size); 2879 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2880 struct btrfs_root *root, 2881 struct btrfs_path *path, 2882 const struct btrfs_key *cpu_key, u32 *data_size, 2883 int nr); 2884 2885 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2886 struct btrfs_root *root, 2887 struct btrfs_path *path, 2888 const struct btrfs_key *key, 2889 u32 data_size) 2890 { 2891 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2892 } 2893 2894 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2895 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2896 int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, 2897 u64 time_seq); 2898 static inline int btrfs_next_old_item(struct btrfs_root *root, 2899 struct btrfs_path *p, u64 time_seq) 2900 { 2901 ++p->slots[0]; 2902 if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) 2903 return btrfs_next_old_leaf(root, p, time_seq); 2904 return 0; 2905 } 2906 static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) 2907 { 2908 return btrfs_next_old_item(root, p, 0); 2909 } 2910 int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info, 2911 struct extent_buffer *leaf); 2912 int __must_check btrfs_drop_snapshot(struct btrfs_root *root, 2913 struct btrfs_block_rsv *block_rsv, 2914 int update_ref, int for_reloc); 2915 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2916 struct btrfs_root *root, 2917 struct extent_buffer *node, 2918 struct extent_buffer *parent); 2919 static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) 2920 { 2921 /* 2922 * Do it this way so we only ever do one test_bit in the normal case. 2923 */ 2924 if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { 2925 if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) 2926 return 2; 2927 return 1; 2928 } 2929 return 0; 2930 } 2931 2932 /* 2933 * If we remount the fs to be R/O or umount the fs, the cleaner needn't do 2934 * anything except sleeping. This function is used to check the status of 2935 * the fs. 2936 */ 2937 static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) 2938 { 2939 return fs_info->sb->s_flags & MS_RDONLY || btrfs_fs_closing(fs_info); 2940 } 2941 2942 static inline void free_fs_info(struct btrfs_fs_info *fs_info) 2943 { 2944 kfree(fs_info->balance_ctl); 2945 kfree(fs_info->delayed_root); 2946 kfree(fs_info->extent_root); 2947 kfree(fs_info->tree_root); 2948 kfree(fs_info->chunk_root); 2949 kfree(fs_info->dev_root); 2950 kfree(fs_info->csum_root); 2951 kfree(fs_info->quota_root); 2952 kfree(fs_info->uuid_root); 2953 kfree(fs_info->free_space_root); 2954 kfree(fs_info->super_copy); 2955 kfree(fs_info->super_for_commit); 2956 security_free_mnt_opts(&fs_info->security_opts); 2957 kfree(fs_info); 2958 } 2959 2960 /* tree mod log functions from ctree.c */ 2961 u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, 2962 struct seq_list *elem); 2963 void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, 2964 struct seq_list *elem); 2965 int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); 2966 2967 /* root-item.c */ 2968 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2969 struct btrfs_fs_info *fs_info, 2970 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2971 const char *name, int name_len); 2972 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2973 struct btrfs_fs_info *fs_info, 2974 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2975 const char *name, int name_len); 2976 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2977 const struct btrfs_key *key); 2978 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2979 const struct btrfs_key *key, 2980 struct btrfs_root_item *item); 2981 int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, 2982 struct btrfs_root *root, 2983 struct btrfs_key *key, 2984 struct btrfs_root_item *item); 2985 int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, 2986 struct btrfs_path *path, struct btrfs_root_item *root_item, 2987 struct btrfs_key *root_key); 2988 int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); 2989 void btrfs_set_root_node(struct btrfs_root_item *item, 2990 struct extent_buffer *node); 2991 void btrfs_check_and_init_root_item(struct btrfs_root_item *item); 2992 void btrfs_update_root_times(struct btrfs_trans_handle *trans, 2993 struct btrfs_root *root); 2994 2995 /* uuid-tree.c */ 2996 int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, 2997 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 2998 u64 subid); 2999 int btrfs_uuid_tree_rem(struct btrfs_trans_handle *trans, 3000 struct btrfs_fs_info *fs_info, u8 *uuid, u8 type, 3001 u64 subid); 3002 int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, 3003 int (*check_func)(struct btrfs_fs_info *, u8 *, u8, 3004 u64)); 3005 3006 /* dir-item.c */ 3007 int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, 3008 const char *name, int name_len); 3009 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 3010 struct btrfs_root *root, const char *name, 3011 int name_len, struct btrfs_inode *dir, 3012 struct btrfs_key *location, u8 type, u64 index); 3013 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 3014 struct btrfs_root *root, 3015 struct btrfs_path *path, u64 dir, 3016 const char *name, int name_len, 3017 int mod); 3018 struct btrfs_dir_item * 3019 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 3020 struct btrfs_root *root, 3021 struct btrfs_path *path, u64 dir, 3022 u64 objectid, const char *name, int name_len, 3023 int mod); 3024 struct btrfs_dir_item * 3025 btrfs_search_dir_index_item(struct btrfs_root *root, 3026 struct btrfs_path *path, u64 dirid, 3027 const char *name, int name_len); 3028 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 3029 struct btrfs_root *root, 3030 struct btrfs_path *path, 3031 struct btrfs_dir_item *di); 3032 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 3033 struct btrfs_root *root, 3034 struct btrfs_path *path, u64 objectid, 3035 const char *name, u16 name_len, 3036 const void *data, u16 data_len); 3037 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 3038 struct btrfs_root *root, 3039 struct btrfs_path *path, u64 dir, 3040 const char *name, u16 name_len, 3041 int mod); 3042 int verify_dir_item(struct btrfs_fs_info *fs_info, 3043 struct extent_buffer *leaf, int slot, 3044 struct btrfs_dir_item *dir_item); 3045 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, 3046 struct btrfs_path *path, 3047 const char *name, 3048 int name_len); 3049 bool btrfs_is_name_len_valid(struct extent_buffer *leaf, int slot, 3050 unsigned long start, u16 name_len); 3051 3052 /* orphan.c */ 3053 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 3054 struct btrfs_root *root, u64 offset); 3055 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 3056 struct btrfs_root *root, u64 offset); 3057 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 3058 3059 /* inode-item.c */ 3060 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 3061 struct btrfs_root *root, 3062 const char *name, int name_len, 3063 u64 inode_objectid, u64 ref_objectid, u64 index); 3064 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 3065 struct btrfs_root *root, 3066 const char *name, int name_len, 3067 u64 inode_objectid, u64 ref_objectid, u64 *index); 3068 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 3069 struct btrfs_root *root, 3070 struct btrfs_path *path, u64 objectid); 3071 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 3072 *root, struct btrfs_path *path, 3073 struct btrfs_key *location, int mod); 3074 3075 struct btrfs_inode_extref * 3076 btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, 3077 struct btrfs_root *root, 3078 struct btrfs_path *path, 3079 const char *name, int name_len, 3080 u64 inode_objectid, u64 ref_objectid, int ins_len, 3081 int cow); 3082 3083 int btrfs_find_name_in_ext_backref(struct btrfs_path *path, 3084 u64 ref_objectid, const char *name, 3085 int name_len, 3086 struct btrfs_inode_extref **extref_ret); 3087 3088 /* file-item.c */ 3089 struct btrfs_dio_private; 3090 int btrfs_del_csums(struct btrfs_trans_handle *trans, 3091 struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); 3092 blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u32 *dst); 3093 blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, 3094 u64 logical_offset); 3095 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 3096 struct btrfs_root *root, 3097 u64 objectid, u64 pos, 3098 u64 disk_offset, u64 disk_num_bytes, 3099 u64 num_bytes, u64 offset, u64 ram_bytes, 3100 u8 compression, u8 encryption, u16 other_encoding); 3101 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 3102 struct btrfs_root *root, 3103 struct btrfs_path *path, u64 objectid, 3104 u64 bytenr, int mod); 3105 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 3106 struct btrfs_root *root, 3107 struct btrfs_ordered_sum *sums); 3108 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, 3109 u64 file_start, int contig); 3110 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, 3111 struct list_head *list, int search_commit); 3112 void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, 3113 const struct btrfs_path *path, 3114 struct btrfs_file_extent_item *fi, 3115 const bool new_inline, 3116 struct extent_map *em); 3117 3118 /* inode.c */ 3119 struct btrfs_delalloc_work { 3120 struct inode *inode; 3121 int delay_iput; 3122 struct completion completion; 3123 struct list_head list; 3124 struct btrfs_work work; 3125 }; 3126 3127 struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode, 3128 int delay_iput); 3129 void btrfs_wait_and_free_delalloc_work(struct btrfs_delalloc_work *work); 3130 3131 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, 3132 struct page *page, size_t pg_offset, u64 start, 3133 u64 len, int create); 3134 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, 3135 u64 *orig_start, u64 *orig_block_len, 3136 u64 *ram_bytes); 3137 3138 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ 3139 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) 3140 #define ClearPageChecked ClearPageFsMisc 3141 #define SetPageChecked SetPageFsMisc 3142 #define PageChecked PageFsMisc 3143 #endif 3144 3145 /* This forces readahead on a given range of bytes in an inode */ 3146 static inline void btrfs_force_ra(struct address_space *mapping, 3147 struct file_ra_state *ra, struct file *file, 3148 pgoff_t offset, unsigned long req_size) 3149 { 3150 page_cache_sync_readahead(mapping, ra, file, offset, req_size); 3151 } 3152 3153 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 3154 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); 3155 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 3156 struct btrfs_root *root, 3157 struct btrfs_inode *dir, struct btrfs_inode *inode, 3158 const char *name, int name_len); 3159 int btrfs_add_link(struct btrfs_trans_handle *trans, 3160 struct btrfs_inode *parent_inode, struct btrfs_inode *inode, 3161 const char *name, int name_len, int add_backref, u64 index); 3162 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 3163 struct btrfs_root *root, 3164 struct inode *dir, u64 objectid, 3165 const char *name, int name_len); 3166 int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, 3167 int front); 3168 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 3169 struct btrfs_root *root, 3170 struct inode *inode, u64 new_size, 3171 u32 min_type); 3172 3173 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 3174 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int delay_iput, 3175 int nr); 3176 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 3177 struct extent_state **cached_state, int dedupe); 3178 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 3179 struct btrfs_root *new_root, 3180 struct btrfs_root *parent_root, 3181 u64 new_dirid); 3182 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 3183 size_t size, struct bio *bio, 3184 unsigned long bio_flags); 3185 void btrfs_set_range_writeback(void *private_data, u64 start, u64 end); 3186 int btrfs_page_mkwrite(struct vm_fault *vmf); 3187 int btrfs_readpage(struct file *file, struct page *page); 3188 void btrfs_evict_inode(struct inode *inode); 3189 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 3190 struct inode *btrfs_alloc_inode(struct super_block *sb); 3191 void btrfs_destroy_inode(struct inode *inode); 3192 int btrfs_drop_inode(struct inode *inode); 3193 int btrfs_init_cachep(void); 3194 void btrfs_destroy_cachep(void); 3195 long btrfs_ioctl_trans_end(struct file *file); 3196 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 3197 struct btrfs_root *root, int *was_new); 3198 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, 3199 struct page *page, size_t pg_offset, 3200 u64 start, u64 end, int create); 3201 int btrfs_update_inode(struct btrfs_trans_handle *trans, 3202 struct btrfs_root *root, 3203 struct inode *inode); 3204 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, 3205 struct btrfs_root *root, struct inode *inode); 3206 int btrfs_orphan_add(struct btrfs_trans_handle *trans, 3207 struct btrfs_inode *inode); 3208 int btrfs_orphan_cleanup(struct btrfs_root *root); 3209 void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, 3210 struct btrfs_root *root); 3211 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); 3212 void btrfs_invalidate_inodes(struct btrfs_root *root); 3213 void btrfs_add_delayed_iput(struct inode *inode); 3214 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); 3215 int btrfs_prealloc_file_range(struct inode *inode, int mode, 3216 u64 start, u64 num_bytes, u64 min_size, 3217 loff_t actual_len, u64 *alloc_hint); 3218 int btrfs_prealloc_file_range_trans(struct inode *inode, 3219 struct btrfs_trans_handle *trans, int mode, 3220 u64 start, u64 num_bytes, u64 min_size, 3221 loff_t actual_len, u64 *alloc_hint); 3222 extern const struct dentry_operations btrfs_dentry_operations; 3223 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3224 void btrfs_test_inode_set_ops(struct inode *inode); 3225 #endif 3226 3227 /* ioctl.c */ 3228 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3229 long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 3230 int btrfs_ioctl_get_supported_features(void __user *arg); 3231 void btrfs_update_iflags(struct inode *inode); 3232 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); 3233 int btrfs_is_empty_uuid(u8 *uuid); 3234 int btrfs_defrag_file(struct inode *inode, struct file *file, 3235 struct btrfs_ioctl_defrag_range_args *range, 3236 u64 newer_than, unsigned long max_pages); 3237 void btrfs_get_block_group_info(struct list_head *groups_list, 3238 struct btrfs_ioctl_space_info *space); 3239 void update_ioctl_balance_args(struct btrfs_fs_info *fs_info, int lock, 3240 struct btrfs_ioctl_balance_args *bargs); 3241 ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, 3242 struct file *dst_file, u64 dst_loff); 3243 3244 /* file.c */ 3245 int btrfs_auto_defrag_init(void); 3246 void btrfs_auto_defrag_exit(void); 3247 int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, 3248 struct btrfs_inode *inode); 3249 int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); 3250 void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); 3251 int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); 3252 void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, 3253 int skip_pinned); 3254 extern const struct file_operations btrfs_file_operations; 3255 int __btrfs_drop_extents(struct btrfs_trans_handle *trans, 3256 struct btrfs_root *root, struct inode *inode, 3257 struct btrfs_path *path, u64 start, u64 end, 3258 u64 *drop_end, int drop_cache, 3259 int replace_extent, 3260 u32 extent_item_size, 3261 int *key_inserted); 3262 int btrfs_drop_extents(struct btrfs_trans_handle *trans, 3263 struct btrfs_root *root, struct inode *inode, u64 start, 3264 u64 end, int drop_cache); 3265 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 3266 struct btrfs_inode *inode, u64 start, u64 end); 3267 int btrfs_release_file(struct inode *inode, struct file *file); 3268 int btrfs_dirty_pages(struct inode *inode, struct page **pages, 3269 size_t num_pages, loff_t pos, size_t write_bytes, 3270 struct extent_state **cached); 3271 int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); 3272 int btrfs_clone_file_range(struct file *file_in, loff_t pos_in, 3273 struct file *file_out, loff_t pos_out, u64 len); 3274 3275 /* tree-defrag.c */ 3276 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 3277 struct btrfs_root *root); 3278 3279 /* sysfs.c */ 3280 int btrfs_init_sysfs(void); 3281 void btrfs_exit_sysfs(void); 3282 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info); 3283 void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info); 3284 3285 /* xattr.c */ 3286 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 3287 3288 /* super.c */ 3289 int btrfs_parse_options(struct btrfs_fs_info *info, char *options, 3290 unsigned long new_flags); 3291 int btrfs_sync_fs(struct super_block *sb, int wait); 3292 3293 static inline __printf(2, 3) 3294 void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) 3295 { 3296 } 3297 3298 #ifdef CONFIG_PRINTK 3299 __printf(2, 3) 3300 void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); 3301 #else 3302 #define btrfs_printk(fs_info, fmt, args...) \ 3303 btrfs_no_printk(fs_info, fmt, ##args) 3304 #endif 3305 3306 #define btrfs_emerg(fs_info, fmt, args...) \ 3307 btrfs_printk(fs_info, KERN_EMERG fmt, ##args) 3308 #define btrfs_alert(fs_info, fmt, args...) \ 3309 btrfs_printk(fs_info, KERN_ALERT fmt, ##args) 3310 #define btrfs_crit(fs_info, fmt, args...) \ 3311 btrfs_printk(fs_info, KERN_CRIT fmt, ##args) 3312 #define btrfs_err(fs_info, fmt, args...) \ 3313 btrfs_printk(fs_info, KERN_ERR fmt, ##args) 3314 #define btrfs_warn(fs_info, fmt, args...) \ 3315 btrfs_printk(fs_info, KERN_WARNING fmt, ##args) 3316 #define btrfs_notice(fs_info, fmt, args...) \ 3317 btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) 3318 #define btrfs_info(fs_info, fmt, args...) \ 3319 btrfs_printk(fs_info, KERN_INFO fmt, ##args) 3320 3321 /* 3322 * Wrappers that use printk_in_rcu 3323 */ 3324 #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ 3325 btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3326 #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ 3327 btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3328 #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ 3329 btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3330 #define btrfs_err_in_rcu(fs_info, fmt, args...) \ 3331 btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) 3332 #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ 3333 btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3334 #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ 3335 btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3336 #define btrfs_info_in_rcu(fs_info, fmt, args...) \ 3337 btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) 3338 3339 /* 3340 * Wrappers that use a ratelimited printk_in_rcu 3341 */ 3342 #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ 3343 btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) 3344 #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ 3345 btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) 3346 #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ 3347 btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) 3348 #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ 3349 btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) 3350 #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ 3351 btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) 3352 #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ 3353 btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) 3354 #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ 3355 btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) 3356 3357 /* 3358 * Wrappers that use a ratelimited printk 3359 */ 3360 #define btrfs_emerg_rl(fs_info, fmt, args...) \ 3361 btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) 3362 #define btrfs_alert_rl(fs_info, fmt, args...) \ 3363 btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) 3364 #define btrfs_crit_rl(fs_info, fmt, args...) \ 3365 btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) 3366 #define btrfs_err_rl(fs_info, fmt, args...) \ 3367 btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) 3368 #define btrfs_warn_rl(fs_info, fmt, args...) \ 3369 btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) 3370 #define btrfs_notice_rl(fs_info, fmt, args...) \ 3371 btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) 3372 #define btrfs_info_rl(fs_info, fmt, args...) \ 3373 btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) 3374 3375 #if defined(CONFIG_DYNAMIC_DEBUG) 3376 #define btrfs_debug(fs_info, fmt, args...) \ 3377 do { \ 3378 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3379 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3380 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args); \ 3381 } while (0) 3382 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3383 do { \ 3384 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3385 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3386 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args); \ 3387 } while (0) 3388 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3389 do { \ 3390 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3391 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3392 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, \ 3393 ##args);\ 3394 } while (0) 3395 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3396 do { \ 3397 DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); \ 3398 if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) \ 3399 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, \ 3400 ##args); \ 3401 } while (0) 3402 #elif defined(DEBUG) 3403 #define btrfs_debug(fs_info, fmt, args...) \ 3404 btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) 3405 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3406 btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3407 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3408 btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) 3409 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3410 btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) 3411 #else 3412 #define btrfs_debug(fs_info, fmt, args...) \ 3413 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3414 #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ 3415 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3416 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ 3417 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3418 #define btrfs_debug_rl(fs_info, fmt, args...) \ 3419 btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) 3420 #endif 3421 3422 #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ 3423 do { \ 3424 rcu_read_lock(); \ 3425 btrfs_printk(fs_info, fmt, ##args); \ 3426 rcu_read_unlock(); \ 3427 } while (0) 3428 3429 #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ 3430 do { \ 3431 static DEFINE_RATELIMIT_STATE(_rs, \ 3432 DEFAULT_RATELIMIT_INTERVAL, \ 3433 DEFAULT_RATELIMIT_BURST); \ 3434 if (__ratelimit(&_rs)) \ 3435 btrfs_printk(fs_info, fmt, ##args); \ 3436 } while (0) 3437 3438 #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ 3439 do { \ 3440 rcu_read_lock(); \ 3441 btrfs_printk_ratelimited(fs_info, fmt, ##args); \ 3442 rcu_read_unlock(); \ 3443 } while (0) 3444 3445 #ifdef CONFIG_BTRFS_ASSERT 3446 3447 __cold 3448 static inline void assfail(char *expr, char *file, int line) 3449 { 3450 pr_err("assertion failed: %s, file: %s, line: %d\n", 3451 expr, file, line); 3452 BUG(); 3453 } 3454 3455 #define ASSERT(expr) \ 3456 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 3457 #else 3458 #define ASSERT(expr) ((void)0) 3459 #endif 3460 3461 __printf(5, 6) 3462 __cold 3463 void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, 3464 unsigned int line, int errno, const char *fmt, ...); 3465 3466 const char *btrfs_decode_error(int errno); 3467 3468 __cold 3469 void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, 3470 const char *function, 3471 unsigned int line, int errno); 3472 3473 /* 3474 * Call btrfs_abort_transaction as early as possible when an error condition is 3475 * detected, that way the exact line number is reported. 3476 */ 3477 #define btrfs_abort_transaction(trans, errno) \ 3478 do { \ 3479 /* Report first abort since mount */ \ 3480 if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ 3481 &((trans)->fs_info->fs_state))) { \ 3482 if ((errno) != -EIO) { \ 3483 WARN(1, KERN_DEBUG \ 3484 "BTRFS: Transaction aborted (error %d)\n", \ 3485 (errno)); \ 3486 } else { \ 3487 btrfs_debug((trans)->fs_info, \ 3488 "Transaction aborted (error %d)", \ 3489 (errno)); \ 3490 } \ 3491 } \ 3492 __btrfs_abort_transaction((trans), __func__, \ 3493 __LINE__, (errno)); \ 3494 } while (0) 3495 3496 #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ 3497 do { \ 3498 __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ 3499 (errno), fmt, ##args); \ 3500 } while (0) 3501 3502 __printf(5, 6) 3503 __cold 3504 void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, 3505 unsigned int line, int errno, const char *fmt, ...); 3506 /* 3507 * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic 3508 * will panic(). Otherwise we BUG() here. 3509 */ 3510 #define btrfs_panic(fs_info, errno, fmt, args...) \ 3511 do { \ 3512 __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ 3513 BUG(); \ 3514 } while (0) 3515 3516 3517 /* compatibility and incompatibility defines */ 3518 3519 #define btrfs_set_fs_incompat(__fs_info, opt) \ 3520 __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3521 3522 static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, 3523 u64 flag) 3524 { 3525 struct btrfs_super_block *disk_super; 3526 u64 features; 3527 3528 disk_super = fs_info->super_copy; 3529 features = btrfs_super_incompat_flags(disk_super); 3530 if (!(features & flag)) { 3531 spin_lock(&fs_info->super_lock); 3532 features = btrfs_super_incompat_flags(disk_super); 3533 if (!(features & flag)) { 3534 features |= flag; 3535 btrfs_set_super_incompat_flags(disk_super, features); 3536 btrfs_info(fs_info, "setting %llu feature flag", 3537 flag); 3538 } 3539 spin_unlock(&fs_info->super_lock); 3540 } 3541 } 3542 3543 #define btrfs_clear_fs_incompat(__fs_info, opt) \ 3544 __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3545 3546 static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, 3547 u64 flag) 3548 { 3549 struct btrfs_super_block *disk_super; 3550 u64 features; 3551 3552 disk_super = fs_info->super_copy; 3553 features = btrfs_super_incompat_flags(disk_super); 3554 if (features & flag) { 3555 spin_lock(&fs_info->super_lock); 3556 features = btrfs_super_incompat_flags(disk_super); 3557 if (features & flag) { 3558 features &= ~flag; 3559 btrfs_set_super_incompat_flags(disk_super, features); 3560 btrfs_info(fs_info, "clearing %llu feature flag", 3561 flag); 3562 } 3563 spin_unlock(&fs_info->super_lock); 3564 } 3565 } 3566 3567 #define btrfs_fs_incompat(fs_info, opt) \ 3568 __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) 3569 3570 static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) 3571 { 3572 struct btrfs_super_block *disk_super; 3573 disk_super = fs_info->super_copy; 3574 return !!(btrfs_super_incompat_flags(disk_super) & flag); 3575 } 3576 3577 #define btrfs_set_fs_compat_ro(__fs_info, opt) \ 3578 __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3579 3580 static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, 3581 u64 flag) 3582 { 3583 struct btrfs_super_block *disk_super; 3584 u64 features; 3585 3586 disk_super = fs_info->super_copy; 3587 features = btrfs_super_compat_ro_flags(disk_super); 3588 if (!(features & flag)) { 3589 spin_lock(&fs_info->super_lock); 3590 features = btrfs_super_compat_ro_flags(disk_super); 3591 if (!(features & flag)) { 3592 features |= flag; 3593 btrfs_set_super_compat_ro_flags(disk_super, features); 3594 btrfs_info(fs_info, "setting %llu ro feature flag", 3595 flag); 3596 } 3597 spin_unlock(&fs_info->super_lock); 3598 } 3599 } 3600 3601 #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ 3602 __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3603 3604 static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, 3605 u64 flag) 3606 { 3607 struct btrfs_super_block *disk_super; 3608 u64 features; 3609 3610 disk_super = fs_info->super_copy; 3611 features = btrfs_super_compat_ro_flags(disk_super); 3612 if (features & flag) { 3613 spin_lock(&fs_info->super_lock); 3614 features = btrfs_super_compat_ro_flags(disk_super); 3615 if (features & flag) { 3616 features &= ~flag; 3617 btrfs_set_super_compat_ro_flags(disk_super, features); 3618 btrfs_info(fs_info, "clearing %llu ro feature flag", 3619 flag); 3620 } 3621 spin_unlock(&fs_info->super_lock); 3622 } 3623 } 3624 3625 #define btrfs_fs_compat_ro(fs_info, opt) \ 3626 __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) 3627 3628 static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) 3629 { 3630 struct btrfs_super_block *disk_super; 3631 disk_super = fs_info->super_copy; 3632 return !!(btrfs_super_compat_ro_flags(disk_super) & flag); 3633 } 3634 3635 /* acl.c */ 3636 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 3637 struct posix_acl *btrfs_get_acl(struct inode *inode, int type); 3638 int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); 3639 int btrfs_init_acl(struct btrfs_trans_handle *trans, 3640 struct inode *inode, struct inode *dir); 3641 #else 3642 #define btrfs_get_acl NULL 3643 #define btrfs_set_acl NULL 3644 static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, 3645 struct inode *inode, struct inode *dir) 3646 { 3647 return 0; 3648 } 3649 #endif 3650 3651 /* relocation.c */ 3652 int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); 3653 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 3654 struct btrfs_root *root); 3655 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 3656 struct btrfs_root *root); 3657 int btrfs_recover_relocation(struct btrfs_root *root); 3658 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 3659 int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, 3660 struct btrfs_root *root, struct extent_buffer *buf, 3661 struct extent_buffer *cow); 3662 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, 3663 u64 *bytes_to_reserve); 3664 int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, 3665 struct btrfs_pending_snapshot *pending); 3666 3667 /* scrub.c */ 3668 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, 3669 u64 end, struct btrfs_scrub_progress *progress, 3670 int readonly, int is_dev_replace); 3671 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); 3672 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); 3673 int btrfs_scrub_cancel(struct btrfs_fs_info *info); 3674 int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info, 3675 struct btrfs_device *dev); 3676 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, 3677 struct btrfs_scrub_progress *progress); 3678 static inline void btrfs_init_full_stripe_locks_tree( 3679 struct btrfs_full_stripe_locks_tree *locks_root) 3680 { 3681 locks_root->root = RB_ROOT; 3682 mutex_init(&locks_root->lock); 3683 } 3684 3685 /* dev-replace.c */ 3686 void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); 3687 void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); 3688 void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); 3689 3690 static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) 3691 { 3692 btrfs_bio_counter_sub(fs_info, 1); 3693 } 3694 3695 /* reada.c */ 3696 struct reada_control { 3697 struct btrfs_fs_info *fs_info; /* tree to prefetch */ 3698 struct btrfs_key key_start; 3699 struct btrfs_key key_end; /* exclusive */ 3700 atomic_t elems; 3701 struct kref refcnt; 3702 wait_queue_head_t wait; 3703 }; 3704 struct reada_control *btrfs_reada_add(struct btrfs_root *root, 3705 struct btrfs_key *start, struct btrfs_key *end); 3706 int btrfs_reada_wait(void *handle); 3707 void btrfs_reada_detach(void *handle); 3708 int btree_readahead_hook(struct extent_buffer *eb, int err); 3709 3710 static inline int is_fstree(u64 rootid) 3711 { 3712 if (rootid == BTRFS_FS_TREE_OBJECTID || 3713 ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && 3714 !btrfs_qgroup_level(rootid))) 3715 return 1; 3716 return 0; 3717 } 3718 3719 static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) 3720 { 3721 return signal_pending(current); 3722 } 3723 3724 /* Sanity test specific functions */ 3725 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3726 void btrfs_test_destroy_inode(struct inode *inode); 3727 #endif 3728 3729 static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) 3730 { 3731 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS 3732 if (unlikely(test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, 3733 &fs_info->fs_state))) 3734 return 1; 3735 #endif 3736 return 0; 3737 } 3738 #endif 3739