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