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