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/version.h> 23 #include <linux/mm.h> 24 #include <linux/highmem.h> 25 #include <linux/fs.h> 26 #include <linux/completion.h> 27 #include <linux/backing-dev.h> 28 #include <linux/wait.h> 29 #include <asm/kmap_types.h> 30 #include "extent_io.h" 31 #include "extent_map.h" 32 #include "async-thread.h" 33 34 struct btrfs_trans_handle; 35 struct btrfs_transaction; 36 extern struct kmem_cache *btrfs_trans_handle_cachep; 37 extern struct kmem_cache *btrfs_transaction_cachep; 38 extern struct kmem_cache *btrfs_bit_radix_cachep; 39 extern struct kmem_cache *btrfs_path_cachep; 40 struct btrfs_ordered_sum; 41 42 #define BTRFS_MAGIC "_BHRfS_M" 43 44 #define BTRFS_MAX_LEVEL 8 45 46 #define BTRFS_COMPAT_EXTENT_TREE_V0 47 48 /* 49 * files bigger than this get some pre-flushing when they are added 50 * to the ordered operations list. That way we limit the total 51 * work done by the commit 52 */ 53 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) 54 55 /* holds pointers to all of the tree roots */ 56 #define BTRFS_ROOT_TREE_OBJECTID 1ULL 57 58 /* stores information about which extents are in use, and reference counts */ 59 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL 60 61 /* 62 * chunk tree stores translations from logical -> physical block numbering 63 * the super block points to the chunk tree 64 */ 65 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL 66 67 /* 68 * stores information about which areas of a given device are in use. 69 * one per device. The tree of tree roots points to the device tree 70 */ 71 #define BTRFS_DEV_TREE_OBJECTID 4ULL 72 73 /* one per subvolume, storing files and directories */ 74 #define BTRFS_FS_TREE_OBJECTID 5ULL 75 76 /* directory objectid inside the root tree */ 77 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL 78 79 /* holds checksums of all the data extents */ 80 #define BTRFS_CSUM_TREE_OBJECTID 7ULL 81 82 /* orhpan objectid for tracking unlinked/truncated files */ 83 #define BTRFS_ORPHAN_OBJECTID -5ULL 84 85 /* does write ahead logging to speed up fsyncs */ 86 #define BTRFS_TREE_LOG_OBJECTID -6ULL 87 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL 88 89 /* for space balancing */ 90 #define BTRFS_TREE_RELOC_OBJECTID -8ULL 91 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL 92 93 /* 94 * extent checksums all have this objectid 95 * this allows them to share the logging tree 96 * for fsyncs 97 */ 98 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL 99 100 /* dummy objectid represents multiple objectids */ 101 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL 102 103 /* 104 * All files have objectids in this range. 105 */ 106 #define BTRFS_FIRST_FREE_OBJECTID 256ULL 107 #define BTRFS_LAST_FREE_OBJECTID -256ULL 108 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL 109 110 111 /* 112 * the device items go into the chunk tree. The key is in the form 113 * [ 1 BTRFS_DEV_ITEM_KEY device_id ] 114 */ 115 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL 116 117 #define BTRFS_BTREE_INODE_OBJECTID 1 118 119 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 120 121 /* 122 * we can actually store much bigger names, but lets not confuse the rest 123 * of linux 124 */ 125 #define BTRFS_NAME_LEN 255 126 127 /* 32 bytes in various csum fields */ 128 #define BTRFS_CSUM_SIZE 32 129 130 /* csum types */ 131 #define BTRFS_CSUM_TYPE_CRC32 0 132 133 static int btrfs_csum_sizes[] = { 4, 0 }; 134 135 /* four bytes for CRC32 */ 136 #define BTRFS_EMPTY_DIR_SIZE 0 137 138 #define BTRFS_FT_UNKNOWN 0 139 #define BTRFS_FT_REG_FILE 1 140 #define BTRFS_FT_DIR 2 141 #define BTRFS_FT_CHRDEV 3 142 #define BTRFS_FT_BLKDEV 4 143 #define BTRFS_FT_FIFO 5 144 #define BTRFS_FT_SOCK 6 145 #define BTRFS_FT_SYMLINK 7 146 #define BTRFS_FT_XATTR 8 147 #define BTRFS_FT_MAX 9 148 149 /* 150 * The key defines the order in the tree, and so it also defines (optimal) 151 * block layout. 152 * 153 * objectid corresponds to the inode number. 154 * 155 * type tells us things about the object, and is a kind of stream selector. 156 * so for a given inode, keys with type of 1 might refer to the inode data, 157 * type of 2 may point to file data in the btree and type == 3 may point to 158 * extents. 159 * 160 * offset is the starting byte offset for this key in the stream. 161 * 162 * btrfs_disk_key is in disk byte order. struct btrfs_key is always 163 * in cpu native order. Otherwise they are identical and their sizes 164 * should be the same (ie both packed) 165 */ 166 struct btrfs_disk_key { 167 __le64 objectid; 168 u8 type; 169 __le64 offset; 170 } __attribute__ ((__packed__)); 171 172 struct btrfs_key { 173 u64 objectid; 174 u8 type; 175 u64 offset; 176 } __attribute__ ((__packed__)); 177 178 struct btrfs_mapping_tree { 179 struct extent_map_tree map_tree; 180 }; 181 182 #define BTRFS_UUID_SIZE 16 183 struct btrfs_dev_item { 184 /* the internal btrfs device id */ 185 __le64 devid; 186 187 /* size of the device */ 188 __le64 total_bytes; 189 190 /* bytes used */ 191 __le64 bytes_used; 192 193 /* optimal io alignment for this device */ 194 __le32 io_align; 195 196 /* optimal io width for this device */ 197 __le32 io_width; 198 199 /* minimal io size for this device */ 200 __le32 sector_size; 201 202 /* type and info about this device */ 203 __le64 type; 204 205 /* expected generation for this device */ 206 __le64 generation; 207 208 /* 209 * starting byte of this partition on the device, 210 * to allow for stripe alignment in the future 211 */ 212 __le64 start_offset; 213 214 /* grouping information for allocation decisions */ 215 __le32 dev_group; 216 217 /* seek speed 0-100 where 100 is fastest */ 218 u8 seek_speed; 219 220 /* bandwidth 0-100 where 100 is fastest */ 221 u8 bandwidth; 222 223 /* btrfs generated uuid for this device */ 224 u8 uuid[BTRFS_UUID_SIZE]; 225 226 /* uuid of FS who owns this device */ 227 u8 fsid[BTRFS_UUID_SIZE]; 228 } __attribute__ ((__packed__)); 229 230 struct btrfs_stripe { 231 __le64 devid; 232 __le64 offset; 233 u8 dev_uuid[BTRFS_UUID_SIZE]; 234 } __attribute__ ((__packed__)); 235 236 struct btrfs_chunk { 237 /* size of this chunk in bytes */ 238 __le64 length; 239 240 /* objectid of the root referencing this chunk */ 241 __le64 owner; 242 243 __le64 stripe_len; 244 __le64 type; 245 246 /* optimal io alignment for this chunk */ 247 __le32 io_align; 248 249 /* optimal io width for this chunk */ 250 __le32 io_width; 251 252 /* minimal io size for this chunk */ 253 __le32 sector_size; 254 255 /* 2^16 stripes is quite a lot, a second limit is the size of a single 256 * item in the btree 257 */ 258 __le16 num_stripes; 259 260 /* sub stripes only matter for raid10 */ 261 __le16 sub_stripes; 262 struct btrfs_stripe stripe; 263 /* additional stripes go here */ 264 } __attribute__ ((__packed__)); 265 266 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 267 { 268 BUG_ON(num_stripes == 0); 269 return sizeof(struct btrfs_chunk) + 270 sizeof(struct btrfs_stripe) * (num_stripes - 1); 271 } 272 273 #define BTRFS_FSID_SIZE 16 274 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) 275 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) 276 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) 277 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) 278 279 #define BTRFS_BACKREF_REV_MAX 256 280 #define BTRFS_BACKREF_REV_SHIFT 56 281 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 282 BTRFS_BACKREF_REV_SHIFT) 283 284 #define BTRFS_OLD_BACKREF_REV 0 285 #define BTRFS_MIXED_BACKREF_REV 1 286 287 /* 288 * every tree block (leaf or node) starts with this header. 289 */ 290 struct btrfs_header { 291 /* these first four must match the super block */ 292 u8 csum[BTRFS_CSUM_SIZE]; 293 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 294 __le64 bytenr; /* which block this node is supposed to live in */ 295 __le64 flags; 296 297 /* allowed to be different from the super from here on down */ 298 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 299 __le64 generation; 300 __le64 owner; 301 __le32 nritems; 302 u8 level; 303 } __attribute__ ((__packed__)); 304 305 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ 306 sizeof(struct btrfs_header)) / \ 307 sizeof(struct btrfs_key_ptr)) 308 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) 309 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) 310 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ 311 sizeof(struct btrfs_item) - \ 312 sizeof(struct btrfs_file_extent_item)) 313 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ 314 sizeof(struct btrfs_item) -\ 315 sizeof(struct btrfs_dir_item)) 316 317 318 /* 319 * this is a very generous portion of the super block, giving us 320 * room to translate 14 chunks with 3 stripes each. 321 */ 322 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 323 #define BTRFS_LABEL_SIZE 256 324 325 /* 326 * the super block basically lists the main trees of the FS 327 * it currently lacks any block count etc etc 328 */ 329 struct btrfs_super_block { 330 u8 csum[BTRFS_CSUM_SIZE]; 331 /* the first 4 fields must match struct btrfs_header */ 332 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 333 __le64 bytenr; /* this block number */ 334 __le64 flags; 335 336 /* allowed to be different from the btrfs_header from here own down */ 337 __le64 magic; 338 __le64 generation; 339 __le64 root; 340 __le64 chunk_root; 341 __le64 log_root; 342 343 /* this will help find the new super based on the log root */ 344 __le64 log_root_transid; 345 __le64 total_bytes; 346 __le64 bytes_used; 347 __le64 root_dir_objectid; 348 __le64 num_devices; 349 __le32 sectorsize; 350 __le32 nodesize; 351 __le32 leafsize; 352 __le32 stripesize; 353 __le32 sys_chunk_array_size; 354 __le64 chunk_root_generation; 355 __le64 compat_flags; 356 __le64 compat_ro_flags; 357 __le64 incompat_flags; 358 __le16 csum_type; 359 u8 root_level; 360 u8 chunk_root_level; 361 u8 log_root_level; 362 struct btrfs_dev_item dev_item; 363 364 char label[BTRFS_LABEL_SIZE]; 365 366 /* future expansion */ 367 __le64 reserved[32]; 368 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 369 } __attribute__ ((__packed__)); 370 371 /* 372 * Compat flags that we support. If any incompat flags are set other than the 373 * ones specified below then we will fail to mount 374 */ 375 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) 376 377 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 378 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL 379 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 380 BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF 381 382 /* 383 * A leaf is full of items. offset and size tell us where to find 384 * the item in the leaf (relative to the start of the data area) 385 */ 386 struct btrfs_item { 387 struct btrfs_disk_key key; 388 __le32 offset; 389 __le32 size; 390 } __attribute__ ((__packed__)); 391 392 /* 393 * leaves have an item area and a data area: 394 * [item0, item1....itemN] [free space] [dataN...data1, data0] 395 * 396 * The data is separate from the items to get the keys closer together 397 * during searches. 398 */ 399 struct btrfs_leaf { 400 struct btrfs_header header; 401 struct btrfs_item items[]; 402 } __attribute__ ((__packed__)); 403 404 /* 405 * all non-leaf blocks are nodes, they hold only keys and pointers to 406 * other blocks 407 */ 408 struct btrfs_key_ptr { 409 struct btrfs_disk_key key; 410 __le64 blockptr; 411 __le64 generation; 412 } __attribute__ ((__packed__)); 413 414 struct btrfs_node { 415 struct btrfs_header header; 416 struct btrfs_key_ptr ptrs[]; 417 } __attribute__ ((__packed__)); 418 419 /* 420 * btrfs_paths remember the path taken from the root down to the leaf. 421 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 422 * to any other levels that are present. 423 * 424 * The slots array records the index of the item or block pointer 425 * used while walking the tree. 426 */ 427 struct btrfs_path { 428 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 429 int slots[BTRFS_MAX_LEVEL]; 430 /* if there is real range locking, this locks field will change */ 431 int locks[BTRFS_MAX_LEVEL]; 432 int reada; 433 /* keep some upper locks as we walk down */ 434 int lowest_level; 435 436 /* 437 * set by btrfs_split_item, tells search_slot to keep all locks 438 * and to force calls to keep space in the nodes 439 */ 440 unsigned int search_for_split:1; 441 unsigned int keep_locks:1; 442 unsigned int skip_locking:1; 443 unsigned int leave_spinning:1; 444 unsigned int search_commit_root:1; 445 }; 446 447 /* 448 * items in the extent btree are used to record the objectid of the 449 * owner of the block and the number of references 450 */ 451 452 struct btrfs_extent_item { 453 __le64 refs; 454 __le64 generation; 455 __le64 flags; 456 } __attribute__ ((__packed__)); 457 458 struct btrfs_extent_item_v0 { 459 __le32 refs; 460 } __attribute__ ((__packed__)); 461 462 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ 463 sizeof(struct btrfs_item)) 464 465 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) 466 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) 467 468 /* following flags only apply to tree blocks */ 469 470 /* use full backrefs for extent pointers in the block */ 471 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) 472 473 struct btrfs_tree_block_info { 474 struct btrfs_disk_key key; 475 u8 level; 476 } __attribute__ ((__packed__)); 477 478 struct btrfs_extent_data_ref { 479 __le64 root; 480 __le64 objectid; 481 __le64 offset; 482 __le32 count; 483 } __attribute__ ((__packed__)); 484 485 struct btrfs_shared_data_ref { 486 __le32 count; 487 } __attribute__ ((__packed__)); 488 489 struct btrfs_extent_inline_ref { 490 u8 type; 491 __le64 offset; 492 } __attribute__ ((__packed__)); 493 494 /* old style backrefs item */ 495 struct btrfs_extent_ref_v0 { 496 __le64 root; 497 __le64 generation; 498 __le64 objectid; 499 __le32 count; 500 } __attribute__ ((__packed__)); 501 502 503 /* dev extents record free space on individual devices. The owner 504 * field points back to the chunk allocation mapping tree that allocated 505 * the extent. The chunk tree uuid field is a way to double check the owner 506 */ 507 struct btrfs_dev_extent { 508 __le64 chunk_tree; 509 __le64 chunk_objectid; 510 __le64 chunk_offset; 511 __le64 length; 512 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 513 } __attribute__ ((__packed__)); 514 515 struct btrfs_inode_ref { 516 __le64 index; 517 __le16 name_len; 518 /* name goes here */ 519 } __attribute__ ((__packed__)); 520 521 struct btrfs_timespec { 522 __le64 sec; 523 __le32 nsec; 524 } __attribute__ ((__packed__)); 525 526 enum btrfs_compression_type { 527 BTRFS_COMPRESS_NONE = 0, 528 BTRFS_COMPRESS_ZLIB = 1, 529 BTRFS_COMPRESS_LAST = 2, 530 }; 531 532 struct btrfs_inode_item { 533 /* nfs style generation number */ 534 __le64 generation; 535 /* transid that last touched this inode */ 536 __le64 transid; 537 __le64 size; 538 __le64 nbytes; 539 __le64 block_group; 540 __le32 nlink; 541 __le32 uid; 542 __le32 gid; 543 __le32 mode; 544 __le64 rdev; 545 __le64 flags; 546 547 /* modification sequence number for NFS */ 548 __le64 sequence; 549 550 /* 551 * a little future expansion, for more than this we can 552 * just grow the inode item and version it 553 */ 554 __le64 reserved[4]; 555 struct btrfs_timespec atime; 556 struct btrfs_timespec ctime; 557 struct btrfs_timespec mtime; 558 struct btrfs_timespec otime; 559 } __attribute__ ((__packed__)); 560 561 struct btrfs_dir_log_item { 562 __le64 end; 563 } __attribute__ ((__packed__)); 564 565 struct btrfs_dir_item { 566 struct btrfs_disk_key location; 567 __le64 transid; 568 __le16 data_len; 569 __le16 name_len; 570 u8 type; 571 } __attribute__ ((__packed__)); 572 573 struct btrfs_root_item { 574 struct btrfs_inode_item inode; 575 __le64 generation; 576 __le64 root_dirid; 577 __le64 bytenr; 578 __le64 byte_limit; 579 __le64 bytes_used; 580 __le64 last_snapshot; 581 __le64 flags; 582 __le32 refs; 583 struct btrfs_disk_key drop_progress; 584 u8 drop_level; 585 u8 level; 586 } __attribute__ ((__packed__)); 587 588 /* 589 * this is used for both forward and backward root refs 590 */ 591 struct btrfs_root_ref { 592 __le64 dirid; 593 __le64 sequence; 594 __le16 name_len; 595 } __attribute__ ((__packed__)); 596 597 #define BTRFS_FILE_EXTENT_INLINE 0 598 #define BTRFS_FILE_EXTENT_REG 1 599 #define BTRFS_FILE_EXTENT_PREALLOC 2 600 601 struct btrfs_file_extent_item { 602 /* 603 * transaction id that created this extent 604 */ 605 __le64 generation; 606 /* 607 * max number of bytes to hold this extent in ram 608 * when we split a compressed extent we can't know how big 609 * each of the resulting pieces will be. So, this is 610 * an upper limit on the size of the extent in ram instead of 611 * an exact limit. 612 */ 613 __le64 ram_bytes; 614 615 /* 616 * 32 bits for the various ways we might encode the data, 617 * including compression and encryption. If any of these 618 * are set to something a given disk format doesn't understand 619 * it is treated like an incompat flag for reading and writing, 620 * but not for stat. 621 */ 622 u8 compression; 623 u8 encryption; 624 __le16 other_encoding; /* spare for later use */ 625 626 /* are we inline data or a real extent? */ 627 u8 type; 628 629 /* 630 * disk space consumed by the extent, checksum blocks are included 631 * in these numbers 632 */ 633 __le64 disk_bytenr; 634 __le64 disk_num_bytes; 635 /* 636 * the logical offset in file blocks (no csums) 637 * this extent record is for. This allows a file extent to point 638 * into the middle of an existing extent on disk, sharing it 639 * between two snapshots (useful if some bytes in the middle of the 640 * extent have changed 641 */ 642 __le64 offset; 643 /* 644 * the logical number of file blocks (no csums included). This 645 * always reflects the size uncompressed and without encoding. 646 */ 647 __le64 num_bytes; 648 649 } __attribute__ ((__packed__)); 650 651 struct btrfs_csum_item { 652 u8 csum; 653 } __attribute__ ((__packed__)); 654 655 /* different types of block groups (and chunks) */ 656 #define BTRFS_BLOCK_GROUP_DATA (1 << 0) 657 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) 658 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) 659 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) 660 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) 661 #define BTRFS_BLOCK_GROUP_DUP (1 << 5) 662 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) 663 664 struct btrfs_block_group_item { 665 __le64 used; 666 __le64 chunk_objectid; 667 __le64 flags; 668 } __attribute__ ((__packed__)); 669 670 struct btrfs_space_info { 671 u64 flags; 672 673 u64 total_bytes; /* total bytes in the space */ 674 u64 bytes_used; /* total bytes used on disk */ 675 u64 bytes_pinned; /* total bytes pinned, will be freed when the 676 transaction finishes */ 677 u64 bytes_reserved; /* total bytes the allocator has reserved for 678 current allocations */ 679 u64 bytes_readonly; /* total bytes that are read only */ 680 u64 bytes_super; /* total bytes reserved for the super blocks */ 681 u64 bytes_root; /* the number of bytes needed to commit a 682 transaction */ 683 u64 bytes_may_use; /* number of bytes that may be used for 684 delalloc/allocations */ 685 u64 bytes_delalloc; /* number of bytes currently reserved for 686 delayed allocation */ 687 688 int full; /* indicates that we cannot allocate any more 689 chunks for this space */ 690 int force_alloc; /* set if we need to force a chunk alloc for 691 this space */ 692 int force_delalloc; /* make people start doing filemap_flush until 693 we're under a threshold */ 694 695 struct list_head list; 696 697 /* for controlling how we free up space for allocations */ 698 wait_queue_head_t allocate_wait; 699 wait_queue_head_t flush_wait; 700 int allocating_chunk; 701 int flushing; 702 703 /* for block groups in our same type */ 704 struct list_head block_groups; 705 spinlock_t lock; 706 struct rw_semaphore groups_sem; 707 atomic_t caching_threads; 708 }; 709 710 /* 711 * free clusters are used to claim free space in relatively large chunks, 712 * allowing us to do less seeky writes. They are used for all metadata 713 * allocations and data allocations in ssd mode. 714 */ 715 struct btrfs_free_cluster { 716 spinlock_t lock; 717 spinlock_t refill_lock; 718 struct rb_root root; 719 720 /* largest extent in this cluster */ 721 u64 max_size; 722 723 /* first extent starting offset */ 724 u64 window_start; 725 726 /* if this cluster simply points at a bitmap in the block group */ 727 bool points_to_bitmap; 728 729 struct btrfs_block_group_cache *block_group; 730 /* 731 * when a cluster is allocated from a block group, we put the 732 * cluster onto a list in the block group so that it can 733 * be freed before the block group is freed. 734 */ 735 struct list_head block_group_list; 736 }; 737 738 enum btrfs_caching_type { 739 BTRFS_CACHE_NO = 0, 740 BTRFS_CACHE_STARTED = 1, 741 BTRFS_CACHE_FINISHED = 2, 742 }; 743 744 struct btrfs_caching_control { 745 struct list_head list; 746 struct mutex mutex; 747 wait_queue_head_t wait; 748 struct btrfs_block_group_cache *block_group; 749 u64 progress; 750 atomic_t count; 751 }; 752 753 struct btrfs_block_group_cache { 754 struct btrfs_key key; 755 struct btrfs_block_group_item item; 756 struct btrfs_fs_info *fs_info; 757 spinlock_t lock; 758 u64 pinned; 759 u64 reserved; 760 u64 bytes_super; 761 u64 flags; 762 u64 sectorsize; 763 int extents_thresh; 764 int free_extents; 765 int total_bitmaps; 766 int ro; 767 int dirty; 768 769 /* cache tracking stuff */ 770 int cached; 771 struct btrfs_caching_control *caching_ctl; 772 u64 last_byte_to_unpin; 773 774 struct btrfs_space_info *space_info; 775 776 /* free space cache stuff */ 777 spinlock_t tree_lock; 778 struct rb_root free_space_offset; 779 u64 free_space; 780 781 /* block group cache stuff */ 782 struct rb_node cache_node; 783 784 /* for block groups in the same raid type */ 785 struct list_head list; 786 787 /* usage count */ 788 atomic_t count; 789 790 /* List of struct btrfs_free_clusters for this block group. 791 * Today it will only have one thing on it, but that may change 792 */ 793 struct list_head cluster_list; 794 }; 795 796 struct reloc_control; 797 struct btrfs_device; 798 struct btrfs_fs_devices; 799 struct btrfs_fs_info { 800 u8 fsid[BTRFS_FSID_SIZE]; 801 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 802 struct btrfs_root *extent_root; 803 struct btrfs_root *tree_root; 804 struct btrfs_root *chunk_root; 805 struct btrfs_root *dev_root; 806 struct btrfs_root *fs_root; 807 struct btrfs_root *csum_root; 808 809 /* the log root tree is a directory of all the other log roots */ 810 struct btrfs_root *log_root_tree; 811 812 spinlock_t fs_roots_radix_lock; 813 struct radix_tree_root fs_roots_radix; 814 815 /* block group cache stuff */ 816 spinlock_t block_group_cache_lock; 817 struct rb_root block_group_cache_tree; 818 819 struct extent_io_tree freed_extents[2]; 820 struct extent_io_tree *pinned_extents; 821 822 /* logical->physical extent mapping */ 823 struct btrfs_mapping_tree mapping_tree; 824 825 u64 generation; 826 u64 last_trans_committed; 827 828 /* 829 * this is updated to the current trans every time a full commit 830 * is required instead of the faster short fsync log commits 831 */ 832 u64 last_trans_log_full_commit; 833 u64 open_ioctl_trans; 834 unsigned long mount_opt; 835 u64 max_extent; 836 u64 max_inline; 837 u64 alloc_start; 838 struct btrfs_transaction *running_transaction; 839 wait_queue_head_t transaction_throttle; 840 wait_queue_head_t transaction_wait; 841 wait_queue_head_t async_submit_wait; 842 843 struct btrfs_super_block super_copy; 844 struct btrfs_super_block super_for_commit; 845 struct block_device *__bdev; 846 struct super_block *sb; 847 struct inode *btree_inode; 848 struct backing_dev_info bdi; 849 struct mutex trans_mutex; 850 struct mutex tree_log_mutex; 851 struct mutex transaction_kthread_mutex; 852 struct mutex cleaner_mutex; 853 struct mutex chunk_mutex; 854 struct mutex volume_mutex; 855 /* 856 * this protects the ordered operations list only while we are 857 * processing all of the entries on it. This way we make 858 * sure the commit code doesn't find the list temporarily empty 859 * because another function happens to be doing non-waiting preflush 860 * before jumping into the main commit. 861 */ 862 struct mutex ordered_operations_mutex; 863 struct rw_semaphore extent_commit_sem; 864 865 struct rw_semaphore cleanup_work_sem; 866 867 struct rw_semaphore subvol_sem; 868 struct srcu_struct subvol_srcu; 869 870 struct list_head trans_list; 871 struct list_head hashers; 872 struct list_head dead_roots; 873 struct list_head caching_block_groups; 874 875 spinlock_t delayed_iput_lock; 876 struct list_head delayed_iputs; 877 878 atomic_t nr_async_submits; 879 atomic_t async_submit_draining; 880 atomic_t nr_async_bios; 881 atomic_t async_delalloc_pages; 882 883 /* 884 * this is used by the balancing code to wait for all the pending 885 * ordered extents 886 */ 887 spinlock_t ordered_extent_lock; 888 889 /* 890 * all of the data=ordered extents pending writeback 891 * these can span multiple transactions and basically include 892 * every dirty data page that isn't from nodatacow 893 */ 894 struct list_head ordered_extents; 895 896 /* 897 * all of the inodes that have delalloc bytes. It is possible for 898 * this list to be empty even when there is still dirty data=ordered 899 * extents waiting to finish IO. 900 */ 901 struct list_head delalloc_inodes; 902 903 /* 904 * special rename and truncate targets that must be on disk before 905 * we're allowed to commit. This is basically the ext3 style 906 * data=ordered list. 907 */ 908 struct list_head ordered_operations; 909 910 /* 911 * there is a pool of worker threads for checksumming during writes 912 * and a pool for checksumming after reads. This is because readers 913 * can run with FS locks held, and the writers may be waiting for 914 * those locks. We don't want ordering in the pending list to cause 915 * deadlocks, and so the two are serviced separately. 916 * 917 * A third pool does submit_bio to avoid deadlocking with the other 918 * two 919 */ 920 struct btrfs_workers generic_worker; 921 struct btrfs_workers workers; 922 struct btrfs_workers delalloc_workers; 923 struct btrfs_workers endio_workers; 924 struct btrfs_workers endio_meta_workers; 925 struct btrfs_workers endio_meta_write_workers; 926 struct btrfs_workers endio_write_workers; 927 struct btrfs_workers submit_workers; 928 struct btrfs_workers enospc_workers; 929 /* 930 * fixup workers take dirty pages that didn't properly go through 931 * the cow mechanism and make them safe to write. It happens 932 * for the sys_munmap function call path 933 */ 934 struct btrfs_workers fixup_workers; 935 struct task_struct *transaction_kthread; 936 struct task_struct *cleaner_kthread; 937 int thread_pool_size; 938 939 struct kobject super_kobj; 940 struct completion kobj_unregister; 941 int do_barriers; 942 int closing; 943 int log_root_recovering; 944 945 u64 total_pinned; 946 947 /* protected by the delalloc lock, used to keep from writing 948 * metadata until there is a nice batch 949 */ 950 u64 dirty_metadata_bytes; 951 struct list_head dirty_cowonly_roots; 952 953 struct btrfs_fs_devices *fs_devices; 954 955 /* 956 * the space_info list is almost entirely read only. It only changes 957 * when we add a new raid type to the FS, and that happens 958 * very rarely. RCU is used to protect it. 959 */ 960 struct list_head space_info; 961 962 struct reloc_control *reloc_ctl; 963 964 spinlock_t delalloc_lock; 965 spinlock_t new_trans_lock; 966 u64 delalloc_bytes; 967 968 /* data_alloc_cluster is only used in ssd mode */ 969 struct btrfs_free_cluster data_alloc_cluster; 970 971 /* all metadata allocations go through this cluster */ 972 struct btrfs_free_cluster meta_alloc_cluster; 973 974 spinlock_t ref_cache_lock; 975 u64 total_ref_cache_size; 976 977 u64 avail_data_alloc_bits; 978 u64 avail_metadata_alloc_bits; 979 u64 avail_system_alloc_bits; 980 u64 data_alloc_profile; 981 u64 metadata_alloc_profile; 982 u64 system_alloc_profile; 983 984 unsigned data_chunk_allocations; 985 unsigned metadata_ratio; 986 987 void *bdev_holder; 988 }; 989 990 /* 991 * in ram representation of the tree. extent_root is used for all allocations 992 * and for the extent tree extent_root root. 993 */ 994 struct btrfs_root { 995 struct extent_buffer *node; 996 997 /* the node lock is held while changing the node pointer */ 998 spinlock_t node_lock; 999 1000 struct extent_buffer *commit_root; 1001 struct btrfs_root *log_root; 1002 struct btrfs_root *reloc_root; 1003 1004 struct btrfs_root_item root_item; 1005 struct btrfs_key root_key; 1006 struct btrfs_fs_info *fs_info; 1007 struct extent_io_tree dirty_log_pages; 1008 1009 struct kobject root_kobj; 1010 struct completion kobj_unregister; 1011 struct mutex objectid_mutex; 1012 1013 struct mutex log_mutex; 1014 wait_queue_head_t log_writer_wait; 1015 wait_queue_head_t log_commit_wait[2]; 1016 atomic_t log_writers; 1017 atomic_t log_commit[2]; 1018 unsigned long log_transid; 1019 unsigned long last_log_commit; 1020 unsigned long log_batch; 1021 pid_t log_start_pid; 1022 bool log_multiple_pids; 1023 1024 u64 objectid; 1025 u64 last_trans; 1026 1027 /* data allocations are done in sectorsize units */ 1028 u32 sectorsize; 1029 1030 /* node allocations are done in nodesize units */ 1031 u32 nodesize; 1032 1033 /* leaf allocations are done in leafsize units */ 1034 u32 leafsize; 1035 1036 u32 stripesize; 1037 1038 u32 type; 1039 1040 u64 highest_objectid; 1041 int ref_cows; 1042 int track_dirty; 1043 int in_radix; 1044 int clean_orphans; 1045 1046 u64 defrag_trans_start; 1047 struct btrfs_key defrag_progress; 1048 struct btrfs_key defrag_max; 1049 int defrag_running; 1050 char *name; 1051 int in_sysfs; 1052 1053 /* the dirty list is only used by non-reference counted roots */ 1054 struct list_head dirty_list; 1055 1056 struct list_head root_list; 1057 1058 spinlock_t list_lock; 1059 struct list_head orphan_list; 1060 1061 spinlock_t inode_lock; 1062 /* red-black tree that keeps track of in-memory inodes */ 1063 struct rb_root inode_tree; 1064 1065 /* 1066 * right now this just gets used so that a root has its own devid 1067 * for stat. It may be used for more later 1068 */ 1069 struct super_block anon_super; 1070 }; 1071 1072 /* 1073 * inode items have the data typically returned from stat and store other 1074 * info about object characteristics. There is one for every file and dir in 1075 * the FS 1076 */ 1077 #define BTRFS_INODE_ITEM_KEY 1 1078 #define BTRFS_INODE_REF_KEY 12 1079 #define BTRFS_XATTR_ITEM_KEY 24 1080 #define BTRFS_ORPHAN_ITEM_KEY 48 1081 /* reserve 2-15 close to the inode for later flexibility */ 1082 1083 /* 1084 * dir items are the name -> inode pointers in a directory. There is one 1085 * for every name in a directory. 1086 */ 1087 #define BTRFS_DIR_LOG_ITEM_KEY 60 1088 #define BTRFS_DIR_LOG_INDEX_KEY 72 1089 #define BTRFS_DIR_ITEM_KEY 84 1090 #define BTRFS_DIR_INDEX_KEY 96 1091 /* 1092 * extent data is for file data 1093 */ 1094 #define BTRFS_EXTENT_DATA_KEY 108 1095 1096 /* 1097 * extent csums are stored in a separate tree and hold csums for 1098 * an entire extent on disk. 1099 */ 1100 #define BTRFS_EXTENT_CSUM_KEY 128 1101 1102 /* 1103 * root items point to tree roots. They are typically in the root 1104 * tree used by the super block to find all the other trees 1105 */ 1106 #define BTRFS_ROOT_ITEM_KEY 132 1107 1108 /* 1109 * root backrefs tie subvols and snapshots to the directory entries that 1110 * reference them 1111 */ 1112 #define BTRFS_ROOT_BACKREF_KEY 144 1113 1114 /* 1115 * root refs make a fast index for listing all of the snapshots and 1116 * subvolumes referenced by a given root. They point directly to the 1117 * directory item in the root that references the subvol 1118 */ 1119 #define BTRFS_ROOT_REF_KEY 156 1120 1121 /* 1122 * extent items are in the extent map tree. These record which blocks 1123 * are used, and how many references there are to each block 1124 */ 1125 #define BTRFS_EXTENT_ITEM_KEY 168 1126 1127 #define BTRFS_TREE_BLOCK_REF_KEY 176 1128 1129 #define BTRFS_EXTENT_DATA_REF_KEY 178 1130 1131 #define BTRFS_EXTENT_REF_V0_KEY 180 1132 1133 #define BTRFS_SHARED_BLOCK_REF_KEY 182 1134 1135 #define BTRFS_SHARED_DATA_REF_KEY 184 1136 1137 /* 1138 * block groups give us hints into the extent allocation trees. Which 1139 * blocks are free etc etc 1140 */ 1141 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 1142 1143 #define BTRFS_DEV_EXTENT_KEY 204 1144 #define BTRFS_DEV_ITEM_KEY 216 1145 #define BTRFS_CHUNK_ITEM_KEY 228 1146 1147 /* 1148 * string items are for debugging. They just store a short string of 1149 * data in the FS 1150 */ 1151 #define BTRFS_STRING_ITEM_KEY 253 1152 1153 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1154 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1155 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1156 #define BTRFS_MOUNT_SSD (1 << 3) 1157 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1158 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1159 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1160 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1161 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1162 #define BTRFS_MOUNT_NOSSD (1 << 9) 1163 #define BTRFS_MOUNT_DISCARD (1 << 10) 1164 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1165 1166 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1167 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1168 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ 1169 BTRFS_MOUNT_##opt) 1170 /* 1171 * Inode flags 1172 */ 1173 #define BTRFS_INODE_NODATASUM (1 << 0) 1174 #define BTRFS_INODE_NODATACOW (1 << 1) 1175 #define BTRFS_INODE_READONLY (1 << 2) 1176 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1177 #define BTRFS_INODE_PREALLOC (1 << 4) 1178 #define BTRFS_INODE_SYNC (1 << 5) 1179 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1180 #define BTRFS_INODE_APPEND (1 << 7) 1181 #define BTRFS_INODE_NODUMP (1 << 8) 1182 #define BTRFS_INODE_NOATIME (1 << 9) 1183 #define BTRFS_INODE_DIRSYNC (1 << 10) 1184 1185 1186 /* some macros to generate set/get funcs for the struct fields. This 1187 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1188 * one for u8: 1189 */ 1190 #define le8_to_cpu(v) (v) 1191 #define cpu_to_le8(v) (v) 1192 #define __le8 u8 1193 1194 #define read_eb_member(eb, ptr, type, member, result) ( \ 1195 read_extent_buffer(eb, (char *)(result), \ 1196 ((unsigned long)(ptr)) + \ 1197 offsetof(type, member), \ 1198 sizeof(((type *)0)->member))) 1199 1200 #define write_eb_member(eb, ptr, type, member, result) ( \ 1201 write_extent_buffer(eb, (char *)(result), \ 1202 ((unsigned long)(ptr)) + \ 1203 offsetof(type, member), \ 1204 sizeof(((type *)0)->member))) 1205 1206 #ifndef BTRFS_SETGET_FUNCS 1207 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1208 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ 1209 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); 1210 #endif 1211 1212 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1213 static inline u##bits btrfs_##name(struct extent_buffer *eb) \ 1214 { \ 1215 type *p = kmap_atomic(eb->first_page, KM_USER0); \ 1216 u##bits res = le##bits##_to_cpu(p->member); \ 1217 kunmap_atomic(p, KM_USER0); \ 1218 return res; \ 1219 } \ 1220 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1221 u##bits val) \ 1222 { \ 1223 type *p = kmap_atomic(eb->first_page, KM_USER0); \ 1224 p->member = cpu_to_le##bits(val); \ 1225 kunmap_atomic(p, KM_USER0); \ 1226 } 1227 1228 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1229 static inline u##bits btrfs_##name(type *s) \ 1230 { \ 1231 return le##bits##_to_cpu(s->member); \ 1232 } \ 1233 static inline void btrfs_set_##name(type *s, u##bits val) \ 1234 { \ 1235 s->member = cpu_to_le##bits(val); \ 1236 } 1237 1238 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1239 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); 1240 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1241 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1242 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1243 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1244 start_offset, 64); 1245 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1246 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1247 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1248 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1249 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1250 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1251 1252 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1253 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1254 total_bytes, 64); 1255 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1256 bytes_used, 64); 1257 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1258 io_align, 32); 1259 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1260 io_width, 32); 1261 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1262 sector_size, 32); 1263 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1264 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1265 dev_group, 32); 1266 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1267 seek_speed, 8); 1268 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1269 bandwidth, 8); 1270 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1271 generation, 64); 1272 1273 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) 1274 { 1275 return (char *)d + offsetof(struct btrfs_dev_item, uuid); 1276 } 1277 1278 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) 1279 { 1280 return (char *)d + offsetof(struct btrfs_dev_item, fsid); 1281 } 1282 1283 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1284 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1285 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1286 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1287 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1288 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1289 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1290 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1291 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1292 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1293 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1294 1295 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1296 { 1297 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1298 } 1299 1300 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1301 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1302 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1303 stripe_len, 64); 1304 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1305 io_align, 32); 1306 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1307 io_width, 32); 1308 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1309 sector_size, 32); 1310 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1311 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1312 num_stripes, 16); 1313 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1314 sub_stripes, 16); 1315 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1316 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1317 1318 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1319 int nr) 1320 { 1321 unsigned long offset = (unsigned long)c; 1322 offset += offsetof(struct btrfs_chunk, stripe); 1323 offset += nr * sizeof(struct btrfs_stripe); 1324 return (struct btrfs_stripe *)offset; 1325 } 1326 1327 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1328 { 1329 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1330 } 1331 1332 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1333 struct btrfs_chunk *c, int nr) 1334 { 1335 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1336 } 1337 1338 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, 1339 struct btrfs_chunk *c, int nr, 1340 u64 val) 1341 { 1342 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); 1343 } 1344 1345 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1346 struct btrfs_chunk *c, int nr) 1347 { 1348 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1349 } 1350 1351 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, 1352 struct btrfs_chunk *c, int nr, 1353 u64 val) 1354 { 1355 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); 1356 } 1357 1358 /* struct btrfs_block_group_item */ 1359 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1360 used, 64); 1361 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1362 used, 64); 1363 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1364 struct btrfs_block_group_item, chunk_objectid, 64); 1365 1366 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1367 struct btrfs_block_group_item, chunk_objectid, 64); 1368 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1369 struct btrfs_block_group_item, flags, 64); 1370 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1371 struct btrfs_block_group_item, flags, 64); 1372 1373 /* struct btrfs_inode_ref */ 1374 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1375 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1376 1377 /* struct btrfs_inode_item */ 1378 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1379 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1380 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1381 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1382 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1383 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1384 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1385 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1386 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1387 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1388 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1389 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1390 1391 static inline struct btrfs_timespec * 1392 btrfs_inode_atime(struct btrfs_inode_item *inode_item) 1393 { 1394 unsigned long ptr = (unsigned long)inode_item; 1395 ptr += offsetof(struct btrfs_inode_item, atime); 1396 return (struct btrfs_timespec *)ptr; 1397 } 1398 1399 static inline struct btrfs_timespec * 1400 btrfs_inode_mtime(struct btrfs_inode_item *inode_item) 1401 { 1402 unsigned long ptr = (unsigned long)inode_item; 1403 ptr += offsetof(struct btrfs_inode_item, mtime); 1404 return (struct btrfs_timespec *)ptr; 1405 } 1406 1407 static inline struct btrfs_timespec * 1408 btrfs_inode_ctime(struct btrfs_inode_item *inode_item) 1409 { 1410 unsigned long ptr = (unsigned long)inode_item; 1411 ptr += offsetof(struct btrfs_inode_item, ctime); 1412 return (struct btrfs_timespec *)ptr; 1413 } 1414 1415 static inline struct btrfs_timespec * 1416 btrfs_inode_otime(struct btrfs_inode_item *inode_item) 1417 { 1418 unsigned long ptr = (unsigned long)inode_item; 1419 ptr += offsetof(struct btrfs_inode_item, otime); 1420 return (struct btrfs_timespec *)ptr; 1421 } 1422 1423 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1424 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1425 1426 /* struct btrfs_dev_extent */ 1427 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1428 chunk_tree, 64); 1429 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1430 chunk_objectid, 64); 1431 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1432 chunk_offset, 64); 1433 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1434 1435 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1436 { 1437 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1438 return (u8 *)((unsigned long)dev + ptr); 1439 } 1440 1441 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1442 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1443 generation, 64); 1444 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1445 1446 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1447 1448 1449 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1450 1451 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1452 struct btrfs_tree_block_info *item, 1453 struct btrfs_disk_key *key) 1454 { 1455 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1456 } 1457 1458 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1459 struct btrfs_tree_block_info *item, 1460 struct btrfs_disk_key *key) 1461 { 1462 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1463 } 1464 1465 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1466 root, 64); 1467 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1468 objectid, 64); 1469 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1470 offset, 64); 1471 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1472 count, 32); 1473 1474 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1475 count, 32); 1476 1477 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1478 type, 8); 1479 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1480 offset, 64); 1481 1482 static inline u32 btrfs_extent_inline_ref_size(int type) 1483 { 1484 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1485 type == BTRFS_SHARED_BLOCK_REF_KEY) 1486 return sizeof(struct btrfs_extent_inline_ref); 1487 if (type == BTRFS_SHARED_DATA_REF_KEY) 1488 return sizeof(struct btrfs_shared_data_ref) + 1489 sizeof(struct btrfs_extent_inline_ref); 1490 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1491 return sizeof(struct btrfs_extent_data_ref) + 1492 offsetof(struct btrfs_extent_inline_ref, offset); 1493 BUG(); 1494 return 0; 1495 } 1496 1497 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1498 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1499 generation, 64); 1500 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1501 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1502 1503 /* struct btrfs_node */ 1504 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1505 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1506 1507 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1508 { 1509 unsigned long ptr; 1510 ptr = offsetof(struct btrfs_node, ptrs) + 1511 sizeof(struct btrfs_key_ptr) * nr; 1512 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1513 } 1514 1515 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1516 int nr, u64 val) 1517 { 1518 unsigned long ptr; 1519 ptr = offsetof(struct btrfs_node, ptrs) + 1520 sizeof(struct btrfs_key_ptr) * nr; 1521 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1522 } 1523 1524 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1525 { 1526 unsigned long ptr; 1527 ptr = offsetof(struct btrfs_node, ptrs) + 1528 sizeof(struct btrfs_key_ptr) * nr; 1529 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1530 } 1531 1532 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1533 int nr, u64 val) 1534 { 1535 unsigned long ptr; 1536 ptr = offsetof(struct btrfs_node, ptrs) + 1537 sizeof(struct btrfs_key_ptr) * nr; 1538 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1539 } 1540 1541 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1542 { 1543 return offsetof(struct btrfs_node, ptrs) + 1544 sizeof(struct btrfs_key_ptr) * nr; 1545 } 1546 1547 void btrfs_node_key(struct extent_buffer *eb, 1548 struct btrfs_disk_key *disk_key, int nr); 1549 1550 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1551 struct btrfs_disk_key *disk_key, int nr) 1552 { 1553 unsigned long ptr; 1554 ptr = btrfs_node_key_ptr_offset(nr); 1555 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1556 struct btrfs_key_ptr, key, disk_key); 1557 } 1558 1559 /* struct btrfs_item */ 1560 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1561 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1562 1563 static inline unsigned long btrfs_item_nr_offset(int nr) 1564 { 1565 return offsetof(struct btrfs_leaf, items) + 1566 sizeof(struct btrfs_item) * nr; 1567 } 1568 1569 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, 1570 int nr) 1571 { 1572 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1573 } 1574 1575 static inline u32 btrfs_item_end(struct extent_buffer *eb, 1576 struct btrfs_item *item) 1577 { 1578 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1579 } 1580 1581 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) 1582 { 1583 return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); 1584 } 1585 1586 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) 1587 { 1588 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); 1589 } 1590 1591 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) 1592 { 1593 return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); 1594 } 1595 1596 static inline void btrfs_item_key(struct extent_buffer *eb, 1597 struct btrfs_disk_key *disk_key, int nr) 1598 { 1599 struct btrfs_item *item = btrfs_item_nr(eb, nr); 1600 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1601 } 1602 1603 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1604 struct btrfs_disk_key *disk_key, int nr) 1605 { 1606 struct btrfs_item *item = btrfs_item_nr(eb, nr); 1607 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1608 } 1609 1610 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1611 1612 /* 1613 * struct btrfs_root_ref 1614 */ 1615 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1616 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1617 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1618 1619 /* struct btrfs_dir_item */ 1620 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1621 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1622 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1623 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1624 1625 static inline void btrfs_dir_item_key(struct extent_buffer *eb, 1626 struct btrfs_dir_item *item, 1627 struct btrfs_disk_key *key) 1628 { 1629 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1630 } 1631 1632 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1633 struct btrfs_dir_item *item, 1634 struct btrfs_disk_key *key) 1635 { 1636 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1637 } 1638 1639 /* struct btrfs_disk_key */ 1640 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1641 objectid, 64); 1642 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1643 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1644 1645 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1646 struct btrfs_disk_key *disk) 1647 { 1648 cpu->offset = le64_to_cpu(disk->offset); 1649 cpu->type = disk->type; 1650 cpu->objectid = le64_to_cpu(disk->objectid); 1651 } 1652 1653 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1654 struct btrfs_key *cpu) 1655 { 1656 disk->offset = cpu_to_le64(cpu->offset); 1657 disk->type = cpu->type; 1658 disk->objectid = cpu_to_le64(cpu->objectid); 1659 } 1660 1661 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, 1662 struct btrfs_key *key, int nr) 1663 { 1664 struct btrfs_disk_key disk_key; 1665 btrfs_node_key(eb, &disk_key, nr); 1666 btrfs_disk_key_to_cpu(key, &disk_key); 1667 } 1668 1669 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, 1670 struct btrfs_key *key, int nr) 1671 { 1672 struct btrfs_disk_key disk_key; 1673 btrfs_item_key(eb, &disk_key, nr); 1674 btrfs_disk_key_to_cpu(key, &disk_key); 1675 } 1676 1677 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, 1678 struct btrfs_dir_item *item, 1679 struct btrfs_key *key) 1680 { 1681 struct btrfs_disk_key disk_key; 1682 btrfs_dir_item_key(eb, item, &disk_key); 1683 btrfs_disk_key_to_cpu(key, &disk_key); 1684 } 1685 1686 1687 static inline u8 btrfs_key_type(struct btrfs_key *key) 1688 { 1689 return key->type; 1690 } 1691 1692 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 1693 { 1694 key->type = val; 1695 } 1696 1697 /* struct btrfs_header */ 1698 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1699 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1700 generation, 64); 1701 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1702 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1703 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1704 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1705 1706 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) 1707 { 1708 return (btrfs_header_flags(eb) & flag) == flag; 1709 } 1710 1711 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1712 { 1713 u64 flags = btrfs_header_flags(eb); 1714 btrfs_set_header_flags(eb, flags | flag); 1715 return (flags & flag) == flag; 1716 } 1717 1718 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1719 { 1720 u64 flags = btrfs_header_flags(eb); 1721 btrfs_set_header_flags(eb, flags & ~flag); 1722 return (flags & flag) == flag; 1723 } 1724 1725 static inline int btrfs_header_backref_rev(struct extent_buffer *eb) 1726 { 1727 u64 flags = btrfs_header_flags(eb); 1728 return flags >> BTRFS_BACKREF_REV_SHIFT; 1729 } 1730 1731 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1732 int rev) 1733 { 1734 u64 flags = btrfs_header_flags(eb); 1735 flags &= ~BTRFS_BACKREF_REV_MASK; 1736 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1737 btrfs_set_header_flags(eb, flags); 1738 } 1739 1740 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) 1741 { 1742 unsigned long ptr = offsetof(struct btrfs_header, fsid); 1743 return (u8 *)ptr; 1744 } 1745 1746 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) 1747 { 1748 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); 1749 return (u8 *)ptr; 1750 } 1751 1752 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) 1753 { 1754 unsigned long ptr = offsetof(struct btrfs_super_block, fsid); 1755 return (u8 *)ptr; 1756 } 1757 1758 static inline u8 *btrfs_header_csum(struct extent_buffer *eb) 1759 { 1760 unsigned long ptr = offsetof(struct btrfs_header, csum); 1761 return (u8 *)ptr; 1762 } 1763 1764 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) 1765 { 1766 return NULL; 1767 } 1768 1769 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) 1770 { 1771 return NULL; 1772 } 1773 1774 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) 1775 { 1776 return NULL; 1777 } 1778 1779 static inline int btrfs_is_leaf(struct extent_buffer *eb) 1780 { 1781 return btrfs_header_level(eb) == 0; 1782 } 1783 1784 /* struct btrfs_root_item */ 1785 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1786 generation, 64); 1787 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1788 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1789 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1790 1791 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1792 generation, 64); 1793 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1794 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 1795 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 1796 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 1797 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 1798 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 1799 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 1800 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 1801 last_snapshot, 64); 1802 1803 /* struct btrfs_super_block */ 1804 1805 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 1806 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 1807 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 1808 generation, 64); 1809 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 1810 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 1811 struct btrfs_super_block, sys_chunk_array_size, 32); 1812 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 1813 struct btrfs_super_block, chunk_root_generation, 64); 1814 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 1815 root_level, 8); 1816 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 1817 chunk_root, 64); 1818 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 1819 chunk_root_level, 8); 1820 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 1821 log_root, 64); 1822 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 1823 log_root_transid, 64); 1824 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 1825 log_root_level, 8); 1826 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 1827 total_bytes, 64); 1828 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 1829 bytes_used, 64); 1830 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 1831 sectorsize, 32); 1832 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 1833 nodesize, 32); 1834 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, 1835 leafsize, 32); 1836 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 1837 stripesize, 32); 1838 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 1839 root_dir_objectid, 64); 1840 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 1841 num_devices, 64); 1842 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 1843 compat_flags, 64); 1844 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 1845 compat_flags, 64); 1846 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 1847 incompat_flags, 64); 1848 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 1849 csum_type, 16); 1850 1851 static inline int btrfs_super_csum_size(struct btrfs_super_block *s) 1852 { 1853 int t = btrfs_super_csum_type(s); 1854 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); 1855 return btrfs_csum_sizes[t]; 1856 } 1857 1858 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) 1859 { 1860 return offsetof(struct btrfs_leaf, items); 1861 } 1862 1863 /* struct btrfs_file_extent_item */ 1864 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 1865 1866 static inline unsigned long 1867 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) 1868 { 1869 unsigned long offset = (unsigned long)e; 1870 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); 1871 return offset; 1872 } 1873 1874 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 1875 { 1876 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; 1877 } 1878 1879 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 1880 disk_bytenr, 64); 1881 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 1882 generation, 64); 1883 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 1884 disk_num_bytes, 64); 1885 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 1886 offset, 64); 1887 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 1888 num_bytes, 64); 1889 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 1890 ram_bytes, 64); 1891 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 1892 compression, 8); 1893 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 1894 encryption, 8); 1895 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 1896 other_encoding, 16); 1897 1898 /* this returns the number of file bytes represented by the inline item. 1899 * If an item is compressed, this is the uncompressed size 1900 */ 1901 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, 1902 struct btrfs_file_extent_item *e) 1903 { 1904 return btrfs_file_extent_ram_bytes(eb, e); 1905 } 1906 1907 /* 1908 * this returns the number of bytes used by the item on disk, minus the 1909 * size of any extent headers. If a file is compressed on disk, this is 1910 * the compressed size 1911 */ 1912 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, 1913 struct btrfs_item *e) 1914 { 1915 unsigned long offset; 1916 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); 1917 return btrfs_item_size(eb, e) - offset; 1918 } 1919 1920 static inline struct btrfs_root *btrfs_sb(struct super_block *sb) 1921 { 1922 return sb->s_fs_info; 1923 } 1924 1925 static inline int btrfs_set_root_name(struct btrfs_root *root, 1926 const char *name, int len) 1927 { 1928 /* if we already have a name just free it */ 1929 kfree(root->name); 1930 1931 root->name = kmalloc(len+1, GFP_KERNEL); 1932 if (!root->name) 1933 return -ENOMEM; 1934 1935 memcpy(root->name, name, len); 1936 root->name[len] = '\0'; 1937 1938 return 0; 1939 } 1940 1941 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) 1942 { 1943 if (level == 0) 1944 return root->leafsize; 1945 return root->nodesize; 1946 } 1947 1948 /* helper function to cast into the data area of the leaf. */ 1949 #define btrfs_item_ptr(leaf, slot, type) \ 1950 ((type *)(btrfs_leaf_data(leaf) + \ 1951 btrfs_item_offset_nr(leaf, slot))) 1952 1953 #define btrfs_item_ptr_offset(leaf, slot) \ 1954 ((unsigned long)(btrfs_leaf_data(leaf) + \ 1955 btrfs_item_offset_nr(leaf, slot))) 1956 1957 static inline struct dentry *fdentry(struct file *file) 1958 { 1959 return file->f_path.dentry; 1960 } 1961 1962 /* extent-tree.c */ 1963 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 1964 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 1965 struct btrfs_root *root, unsigned long count); 1966 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); 1967 int btrfs_pin_extent(struct btrfs_root *root, 1968 u64 bytenr, u64 num, int reserved); 1969 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, 1970 struct btrfs_root *root, struct extent_buffer *leaf); 1971 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, 1972 struct btrfs_root *root, 1973 u64 objectid, u64 offset, u64 bytenr); 1974 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); 1975 struct btrfs_block_group_cache *btrfs_lookup_block_group( 1976 struct btrfs_fs_info *info, 1977 u64 bytenr); 1978 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 1979 u64 btrfs_find_block_group(struct btrfs_root *root, 1980 u64 search_start, u64 search_hint, int owner); 1981 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, 1982 struct btrfs_root *root, u32 blocksize, 1983 u64 parent, u64 root_objectid, 1984 struct btrfs_disk_key *key, int level, 1985 u64 hint, u64 empty_size); 1986 int btrfs_free_tree_block(struct btrfs_trans_handle *trans, 1987 struct btrfs_root *root, 1988 u64 bytenr, u32 blocksize, 1989 u64 parent, u64 root_objectid, int level); 1990 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, 1991 struct btrfs_root *root, 1992 u64 bytenr, u32 blocksize, 1993 int level); 1994 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 1995 struct btrfs_root *root, 1996 u64 root_objectid, u64 owner, 1997 u64 offset, struct btrfs_key *ins); 1998 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 1999 struct btrfs_root *root, 2000 u64 root_objectid, u64 owner, u64 offset, 2001 struct btrfs_key *ins); 2002 int btrfs_reserve_extent(struct btrfs_trans_handle *trans, 2003 struct btrfs_root *root, 2004 u64 num_bytes, u64 min_alloc_size, 2005 u64 empty_size, u64 hint_byte, 2006 u64 search_end, struct btrfs_key *ins, 2007 u64 data); 2008 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2009 struct extent_buffer *buf, int full_backref); 2010 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2011 struct extent_buffer *buf, int full_backref); 2012 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2013 struct btrfs_root *root, 2014 u64 bytenr, u64 num_bytes, u64 flags, 2015 int is_data); 2016 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2017 struct btrfs_root *root, 2018 u64 bytenr, u64 num_bytes, u64 parent, 2019 u64 root_objectid, u64 owner, u64 offset); 2020 2021 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); 2022 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, 2023 struct btrfs_root *root); 2024 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2025 struct btrfs_root *root); 2026 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2027 struct btrfs_root *root, 2028 u64 bytenr, u64 num_bytes, u64 parent, 2029 u64 root_objectid, u64 owner, u64 offset); 2030 2031 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2032 struct btrfs_root *root); 2033 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); 2034 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2035 int btrfs_read_block_groups(struct btrfs_root *root); 2036 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); 2037 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2038 struct btrfs_root *root, u64 bytes_used, 2039 u64 type, u64 chunk_objectid, u64 chunk_offset, 2040 u64 size); 2041 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2042 struct btrfs_root *root, u64 group_start); 2043 int btrfs_prepare_block_group_relocation(struct btrfs_root *root, 2044 struct btrfs_block_group_cache *group); 2045 2046 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); 2047 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); 2048 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2049 2050 int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items); 2051 int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items); 2052 int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root, 2053 struct inode *inode, int num_items); 2054 int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root, 2055 struct inode *inode, int num_items); 2056 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode, 2057 u64 bytes); 2058 void btrfs_free_reserved_data_space(struct btrfs_root *root, 2059 struct inode *inode, u64 bytes); 2060 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode, 2061 u64 bytes); 2062 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode, 2063 u64 bytes); 2064 /* ctree.c */ 2065 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, 2066 int level, int *slot); 2067 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); 2068 int btrfs_previous_item(struct btrfs_root *root, 2069 struct btrfs_path *path, u64 min_objectid, 2070 int type); 2071 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, 2072 struct btrfs_root *root, struct btrfs_path *path, 2073 struct btrfs_key *new_key); 2074 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2075 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2076 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2077 struct btrfs_key *key, int lowest_level, 2078 int cache_only, u64 min_trans); 2079 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2080 struct btrfs_key *max_key, 2081 struct btrfs_path *path, int cache_only, 2082 u64 min_trans); 2083 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2084 struct btrfs_root *root, struct extent_buffer *buf, 2085 struct extent_buffer *parent, int parent_slot, 2086 struct extent_buffer **cow_ret); 2087 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2088 struct btrfs_root *root, 2089 struct extent_buffer *buf, 2090 struct extent_buffer **cow_ret, u64 new_root_objectid); 2091 int btrfs_block_can_be_shared(struct btrfs_root *root, 2092 struct extent_buffer *buf); 2093 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root 2094 *root, struct btrfs_path *path, u32 data_size); 2095 int btrfs_truncate_item(struct btrfs_trans_handle *trans, 2096 struct btrfs_root *root, 2097 struct btrfs_path *path, 2098 u32 new_size, int from_end); 2099 int btrfs_split_item(struct btrfs_trans_handle *trans, 2100 struct btrfs_root *root, 2101 struct btrfs_path *path, 2102 struct btrfs_key *new_key, 2103 unsigned long split_offset); 2104 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2105 struct btrfs_root *root, 2106 struct btrfs_path *path, 2107 struct btrfs_key *new_key); 2108 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root 2109 *root, struct btrfs_key *key, struct btrfs_path *p, int 2110 ins_len, int cow); 2111 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2112 struct btrfs_root *root, struct extent_buffer *parent, 2113 int start_slot, int cache_only, u64 *last_ret, 2114 struct btrfs_key *progress); 2115 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); 2116 struct btrfs_path *btrfs_alloc_path(void); 2117 void btrfs_free_path(struct btrfs_path *p); 2118 void btrfs_set_path_blocking(struct btrfs_path *p); 2119 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2120 2121 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2122 struct btrfs_path *path, int slot, int nr); 2123 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2124 struct btrfs_root *root, 2125 struct btrfs_path *path) 2126 { 2127 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2128 } 2129 2130 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root 2131 *root, struct btrfs_key *key, void *data, u32 data_size); 2132 int btrfs_insert_some_items(struct btrfs_trans_handle *trans, 2133 struct btrfs_root *root, 2134 struct btrfs_path *path, 2135 struct btrfs_key *cpu_key, u32 *data_size, 2136 int nr); 2137 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2138 struct btrfs_root *root, 2139 struct btrfs_path *path, 2140 struct btrfs_key *cpu_key, u32 *data_size, int nr); 2141 2142 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2143 struct btrfs_root *root, 2144 struct btrfs_path *path, 2145 struct btrfs_key *key, 2146 u32 data_size) 2147 { 2148 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2149 } 2150 2151 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2152 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2153 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); 2154 int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref); 2155 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2156 struct btrfs_root *root, 2157 struct extent_buffer *node, 2158 struct extent_buffer *parent); 2159 /* root-item.c */ 2160 int btrfs_find_root_ref(struct btrfs_root *tree_root, 2161 struct btrfs_path *path, 2162 u64 root_id, u64 ref_id); 2163 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2164 struct btrfs_root *tree_root, 2165 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2166 const char *name, int name_len); 2167 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2168 struct btrfs_root *tree_root, 2169 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2170 const char *name, int name_len); 2171 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2172 struct btrfs_key *key); 2173 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root 2174 *root, struct btrfs_key *key, struct btrfs_root_item 2175 *item); 2176 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root 2177 *root, struct btrfs_key *key, struct btrfs_root_item 2178 *item); 2179 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct 2180 btrfs_root_item *item, struct btrfs_key *key); 2181 int btrfs_search_root(struct btrfs_root *root, u64 search_start, 2182 u64 *found_objectid); 2183 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); 2184 int btrfs_find_orphan_roots(struct btrfs_root *tree_root); 2185 int btrfs_set_root_node(struct btrfs_root_item *item, 2186 struct extent_buffer *node); 2187 /* dir-item.c */ 2188 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 2189 struct btrfs_root *root, const char *name, 2190 int name_len, u64 dir, 2191 struct btrfs_key *location, u8 type, u64 index); 2192 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2193 struct btrfs_root *root, 2194 struct btrfs_path *path, u64 dir, 2195 const char *name, int name_len, 2196 int mod); 2197 struct btrfs_dir_item * 2198 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2199 struct btrfs_root *root, 2200 struct btrfs_path *path, u64 dir, 2201 u64 objectid, const char *name, int name_len, 2202 int mod); 2203 struct btrfs_dir_item * 2204 btrfs_search_dir_index_item(struct btrfs_root *root, 2205 struct btrfs_path *path, u64 dirid, 2206 const char *name, int name_len); 2207 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, 2208 struct btrfs_path *path, 2209 const char *name, int name_len); 2210 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2211 struct btrfs_root *root, 2212 struct btrfs_path *path, 2213 struct btrfs_dir_item *di); 2214 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2215 struct btrfs_root *root, 2216 struct btrfs_path *path, u64 objectid, 2217 const char *name, u16 name_len, 2218 const void *data, u16 data_len); 2219 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2220 struct btrfs_root *root, 2221 struct btrfs_path *path, u64 dir, 2222 const char *name, u16 name_len, 2223 int mod); 2224 2225 /* orphan.c */ 2226 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2227 struct btrfs_root *root, u64 offset); 2228 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2229 struct btrfs_root *root, u64 offset); 2230 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2231 2232 /* inode-map.c */ 2233 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, 2234 struct btrfs_root *fs_root, 2235 u64 dirid, u64 *objectid); 2236 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); 2237 2238 /* inode-item.c */ 2239 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2240 struct btrfs_root *root, 2241 const char *name, int name_len, 2242 u64 inode_objectid, u64 ref_objectid, u64 index); 2243 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2244 struct btrfs_root *root, 2245 const char *name, int name_len, 2246 u64 inode_objectid, u64 ref_objectid, u64 *index); 2247 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2248 struct btrfs_root *root, 2249 struct btrfs_path *path, u64 objectid); 2250 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2251 *root, struct btrfs_path *path, 2252 struct btrfs_key *location, int mod); 2253 2254 /* file-item.c */ 2255 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2256 struct btrfs_root *root, u64 bytenr, u64 len); 2257 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, 2258 struct bio *bio, u32 *dst); 2259 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2260 struct btrfs_root *root, 2261 u64 objectid, u64 pos, 2262 u64 disk_offset, u64 disk_num_bytes, 2263 u64 num_bytes, u64 offset, u64 ram_bytes, 2264 u8 compression, u8 encryption, u16 other_encoding); 2265 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2266 struct btrfs_root *root, 2267 struct btrfs_path *path, u64 objectid, 2268 u64 bytenr, int mod); 2269 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2270 struct btrfs_root *root, 2271 struct btrfs_ordered_sum *sums); 2272 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, 2273 struct bio *bio, u64 file_start, int contig); 2274 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, 2275 u64 start, unsigned long len); 2276 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, 2277 struct btrfs_root *root, 2278 struct btrfs_path *path, 2279 u64 bytenr, int cow); 2280 int btrfs_csum_truncate(struct btrfs_trans_handle *trans, 2281 struct btrfs_root *root, struct btrfs_path *path, 2282 u64 isize); 2283 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, 2284 u64 end, struct list_head *list); 2285 /* inode.c */ 2286 2287 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ 2288 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) 2289 #define ClearPageChecked ClearPageFsMisc 2290 #define SetPageChecked SetPageFsMisc 2291 #define PageChecked PageFsMisc 2292 #endif 2293 2294 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2295 int btrfs_set_inode_index(struct inode *dir, u64 *index); 2296 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2297 struct btrfs_root *root, 2298 struct inode *dir, struct inode *inode, 2299 const char *name, int name_len); 2300 int btrfs_add_link(struct btrfs_trans_handle *trans, 2301 struct inode *parent_inode, struct inode *inode, 2302 const char *name, int name_len, int add_backref, u64 index); 2303 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 2304 struct btrfs_root *root, 2305 struct inode *dir, u64 objectid, 2306 const char *name, int name_len); 2307 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2308 struct btrfs_root *root, 2309 struct inode *inode, u64 new_size, 2310 u32 min_type); 2311 2312 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 2313 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end); 2314 int btrfs_writepages(struct address_space *mapping, 2315 struct writeback_control *wbc); 2316 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2317 struct btrfs_root *new_root, 2318 u64 new_dirid, u64 alloc_hint); 2319 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 2320 size_t size, struct bio *bio, unsigned long bio_flags); 2321 2322 unsigned long btrfs_force_ra(struct address_space *mapping, 2323 struct file_ra_state *ra, struct file *file, 2324 pgoff_t offset, pgoff_t last_index); 2325 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); 2326 int btrfs_readpage(struct file *file, struct page *page); 2327 void btrfs_delete_inode(struct inode *inode); 2328 void btrfs_put_inode(struct inode *inode); 2329 int btrfs_write_inode(struct inode *inode, int wait); 2330 void btrfs_dirty_inode(struct inode *inode); 2331 struct inode *btrfs_alloc_inode(struct super_block *sb); 2332 void btrfs_destroy_inode(struct inode *inode); 2333 void btrfs_drop_inode(struct inode *inode); 2334 int btrfs_init_cachep(void); 2335 void btrfs_destroy_cachep(void); 2336 long btrfs_ioctl_trans_end(struct file *file); 2337 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2338 struct btrfs_root *root); 2339 int btrfs_commit_write(struct file *file, struct page *page, 2340 unsigned from, unsigned to); 2341 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, 2342 size_t page_offset, u64 start, u64 end, 2343 int create); 2344 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2345 struct btrfs_root *root, 2346 struct inode *inode); 2347 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); 2348 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); 2349 void btrfs_orphan_cleanup(struct btrfs_root *root); 2350 int btrfs_cont_expand(struct inode *inode, loff_t size); 2351 int btrfs_invalidate_inodes(struct btrfs_root *root); 2352 void btrfs_add_delayed_iput(struct inode *inode); 2353 void btrfs_run_delayed_iputs(struct btrfs_root *root); 2354 extern const struct dentry_operations btrfs_dentry_operations; 2355 2356 /* ioctl.c */ 2357 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2358 void btrfs_update_iflags(struct inode *inode); 2359 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); 2360 2361 /* file.c */ 2362 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync); 2363 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, 2364 int skip_pinned); 2365 int btrfs_check_file(struct btrfs_root *root, struct inode *inode); 2366 extern const struct file_operations btrfs_file_operations; 2367 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, 2368 u64 start, u64 end, u64 *hint_byte, int drop_cache); 2369 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2370 struct inode *inode, u64 start, u64 end); 2371 int btrfs_release_file(struct inode *inode, struct file *file); 2372 2373 /* tree-defrag.c */ 2374 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2375 struct btrfs_root *root, int cache_only); 2376 2377 /* sysfs.c */ 2378 int btrfs_init_sysfs(void); 2379 void btrfs_exit_sysfs(void); 2380 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); 2381 int btrfs_sysfs_add_root(struct btrfs_root *root); 2382 void btrfs_sysfs_del_root(struct btrfs_root *root); 2383 void btrfs_sysfs_del_super(struct btrfs_fs_info *root); 2384 2385 /* xattr.c */ 2386 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 2387 2388 /* super.c */ 2389 u64 btrfs_parse_size(char *str); 2390 int btrfs_parse_options(struct btrfs_root *root, char *options); 2391 int btrfs_sync_fs(struct super_block *sb, int wait); 2392 2393 /* acl.c */ 2394 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 2395 int btrfs_check_acl(struct inode *inode, int mask); 2396 #else 2397 #define btrfs_check_acl NULL 2398 #endif 2399 int btrfs_init_acl(struct btrfs_trans_handle *trans, 2400 struct inode *inode, struct inode *dir); 2401 int btrfs_acl_chmod(struct inode *inode); 2402 2403 /* relocation.c */ 2404 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); 2405 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 2406 struct btrfs_root *root); 2407 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 2408 struct btrfs_root *root); 2409 int btrfs_recover_relocation(struct btrfs_root *root); 2410 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 2411 #endif 2412