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