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