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 <linux/slab.h> 30 #include <asm/kmap_types.h> 31 #include "extent_io.h" 32 #include "extent_map.h" 33 #include "async-thread.h" 34 35 struct btrfs_trans_handle; 36 struct btrfs_transaction; 37 extern struct kmem_cache *btrfs_trans_handle_cachep; 38 extern struct kmem_cache *btrfs_transaction_cachep; 39 extern struct kmem_cache *btrfs_bit_radix_cachep; 40 extern struct kmem_cache *btrfs_path_cachep; 41 struct btrfs_ordered_sum; 42 43 #define BTRFS_MAGIC "_BHRfS_M" 44 45 #define BTRFS_MAX_LEVEL 8 46 47 #define BTRFS_COMPAT_EXTENT_TREE_V0 48 49 /* 50 * files bigger than this get some pre-flushing when they are added 51 * to the ordered operations list. That way we limit the total 52 * work done by the commit 53 */ 54 #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) 55 56 /* holds pointers to all of the tree roots */ 57 #define BTRFS_ROOT_TREE_OBJECTID 1ULL 58 59 /* stores information about which extents are in use, and reference counts */ 60 #define BTRFS_EXTENT_TREE_OBJECTID 2ULL 61 62 /* 63 * chunk tree stores translations from logical -> physical block numbering 64 * the super block points to the chunk tree 65 */ 66 #define BTRFS_CHUNK_TREE_OBJECTID 3ULL 67 68 /* 69 * stores information about which areas of a given device are in use. 70 * one per device. The tree of tree roots points to the device tree 71 */ 72 #define BTRFS_DEV_TREE_OBJECTID 4ULL 73 74 /* one per subvolume, storing files and directories */ 75 #define BTRFS_FS_TREE_OBJECTID 5ULL 76 77 /* directory objectid inside the root tree */ 78 #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL 79 80 /* holds checksums of all the data extents */ 81 #define BTRFS_CSUM_TREE_OBJECTID 7ULL 82 83 /* orhpan objectid for tracking unlinked/truncated files */ 84 #define BTRFS_ORPHAN_OBJECTID -5ULL 85 86 /* does write ahead logging to speed up fsyncs */ 87 #define BTRFS_TREE_LOG_OBJECTID -6ULL 88 #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL 89 90 /* for space balancing */ 91 #define BTRFS_TREE_RELOC_OBJECTID -8ULL 92 #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL 93 94 /* 95 * extent checksums all have this objectid 96 * this allows them to share the logging tree 97 * for fsyncs 98 */ 99 #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL 100 101 /* dummy objectid represents multiple objectids */ 102 #define BTRFS_MULTIPLE_OBJECTIDS -255ULL 103 104 /* 105 * All files have objectids in this range. 106 */ 107 #define BTRFS_FIRST_FREE_OBJECTID 256ULL 108 #define BTRFS_LAST_FREE_OBJECTID -256ULL 109 #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL 110 111 112 /* 113 * the device items go into the chunk tree. The key is in the form 114 * [ 1 BTRFS_DEV_ITEM_KEY device_id ] 115 */ 116 #define BTRFS_DEV_ITEMS_OBJECTID 1ULL 117 118 #define BTRFS_BTREE_INODE_OBJECTID 1 119 120 #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 121 122 /* 123 * we can actually store much bigger names, but lets not confuse the rest 124 * of linux 125 */ 126 #define BTRFS_NAME_LEN 255 127 128 /* 32 bytes in various csum fields */ 129 #define BTRFS_CSUM_SIZE 32 130 131 /* csum types */ 132 #define BTRFS_CSUM_TYPE_CRC32 0 133 134 static int btrfs_csum_sizes[] = { 4, 0 }; 135 136 /* four bytes for CRC32 */ 137 #define BTRFS_EMPTY_DIR_SIZE 0 138 139 #define BTRFS_FT_UNKNOWN 0 140 #define BTRFS_FT_REG_FILE 1 141 #define BTRFS_FT_DIR 2 142 #define BTRFS_FT_CHRDEV 3 143 #define BTRFS_FT_BLKDEV 4 144 #define BTRFS_FT_FIFO 5 145 #define BTRFS_FT_SOCK 6 146 #define BTRFS_FT_SYMLINK 7 147 #define BTRFS_FT_XATTR 8 148 #define BTRFS_FT_MAX 9 149 150 /* 151 * The key defines the order in the tree, and so it also defines (optimal) 152 * block layout. 153 * 154 * objectid corresponds to the inode number. 155 * 156 * type tells us things about the object, and is a kind of stream selector. 157 * so for a given inode, keys with type of 1 might refer to the inode data, 158 * type of 2 may point to file data in the btree and type == 3 may point to 159 * extents. 160 * 161 * offset is the starting byte offset for this key in the stream. 162 * 163 * btrfs_disk_key is in disk byte order. struct btrfs_key is always 164 * in cpu native order. Otherwise they are identical and their sizes 165 * should be the same (ie both packed) 166 */ 167 struct btrfs_disk_key { 168 __le64 objectid; 169 u8 type; 170 __le64 offset; 171 } __attribute__ ((__packed__)); 172 173 struct btrfs_key { 174 u64 objectid; 175 u8 type; 176 u64 offset; 177 } __attribute__ ((__packed__)); 178 179 struct btrfs_mapping_tree { 180 struct extent_map_tree map_tree; 181 }; 182 183 #define BTRFS_UUID_SIZE 16 184 struct btrfs_dev_item { 185 /* the internal btrfs device id */ 186 __le64 devid; 187 188 /* size of the device */ 189 __le64 total_bytes; 190 191 /* bytes used */ 192 __le64 bytes_used; 193 194 /* optimal io alignment for this device */ 195 __le32 io_align; 196 197 /* optimal io width for this device */ 198 __le32 io_width; 199 200 /* minimal io size for this device */ 201 __le32 sector_size; 202 203 /* type and info about this device */ 204 __le64 type; 205 206 /* expected generation for this device */ 207 __le64 generation; 208 209 /* 210 * starting byte of this partition on the device, 211 * to allow for stripe alignment in the future 212 */ 213 __le64 start_offset; 214 215 /* grouping information for allocation decisions */ 216 __le32 dev_group; 217 218 /* seek speed 0-100 where 100 is fastest */ 219 u8 seek_speed; 220 221 /* bandwidth 0-100 where 100 is fastest */ 222 u8 bandwidth; 223 224 /* btrfs generated uuid for this device */ 225 u8 uuid[BTRFS_UUID_SIZE]; 226 227 /* uuid of FS who owns this device */ 228 u8 fsid[BTRFS_UUID_SIZE]; 229 } __attribute__ ((__packed__)); 230 231 struct btrfs_stripe { 232 __le64 devid; 233 __le64 offset; 234 u8 dev_uuid[BTRFS_UUID_SIZE]; 235 } __attribute__ ((__packed__)); 236 237 struct btrfs_chunk { 238 /* size of this chunk in bytes */ 239 __le64 length; 240 241 /* objectid of the root referencing this chunk */ 242 __le64 owner; 243 244 __le64 stripe_len; 245 __le64 type; 246 247 /* optimal io alignment for this chunk */ 248 __le32 io_align; 249 250 /* optimal io width for this chunk */ 251 __le32 io_width; 252 253 /* minimal io size for this chunk */ 254 __le32 sector_size; 255 256 /* 2^16 stripes is quite a lot, a second limit is the size of a single 257 * item in the btree 258 */ 259 __le16 num_stripes; 260 261 /* sub stripes only matter for raid10 */ 262 __le16 sub_stripes; 263 struct btrfs_stripe stripe; 264 /* additional stripes go here */ 265 } __attribute__ ((__packed__)); 266 267 static inline unsigned long btrfs_chunk_item_size(int num_stripes) 268 { 269 BUG_ON(num_stripes == 0); 270 return sizeof(struct btrfs_chunk) + 271 sizeof(struct btrfs_stripe) * (num_stripes - 1); 272 } 273 274 #define BTRFS_FSID_SIZE 16 275 #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) 276 #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) 277 #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) 278 #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) 279 280 #define BTRFS_BACKREF_REV_MAX 256 281 #define BTRFS_BACKREF_REV_SHIFT 56 282 #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ 283 BTRFS_BACKREF_REV_SHIFT) 284 285 #define BTRFS_OLD_BACKREF_REV 0 286 #define BTRFS_MIXED_BACKREF_REV 1 287 288 /* 289 * every tree block (leaf or node) starts with this header. 290 */ 291 struct btrfs_header { 292 /* these first four must match the super block */ 293 u8 csum[BTRFS_CSUM_SIZE]; 294 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 295 __le64 bytenr; /* which block this node is supposed to live in */ 296 __le64 flags; 297 298 /* allowed to be different from the super from here on down */ 299 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 300 __le64 generation; 301 __le64 owner; 302 __le32 nritems; 303 u8 level; 304 } __attribute__ ((__packed__)); 305 306 #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ 307 sizeof(struct btrfs_header)) / \ 308 sizeof(struct btrfs_key_ptr)) 309 #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) 310 #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) 311 #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ 312 sizeof(struct btrfs_item) - \ 313 sizeof(struct btrfs_file_extent_item)) 314 #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ 315 sizeof(struct btrfs_item) -\ 316 sizeof(struct btrfs_dir_item)) 317 318 319 /* 320 * this is a very generous portion of the super block, giving us 321 * room to translate 14 chunks with 3 stripes each. 322 */ 323 #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 324 #define BTRFS_LABEL_SIZE 256 325 326 /* 327 * the super block basically lists the main trees of the FS 328 * it currently lacks any block count etc etc 329 */ 330 struct btrfs_super_block { 331 u8 csum[BTRFS_CSUM_SIZE]; 332 /* the first 4 fields must match struct btrfs_header */ 333 u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ 334 __le64 bytenr; /* this block number */ 335 __le64 flags; 336 337 /* allowed to be different from the btrfs_header from here own down */ 338 __le64 magic; 339 __le64 generation; 340 __le64 root; 341 __le64 chunk_root; 342 __le64 log_root; 343 344 /* this will help find the new super based on the log root */ 345 __le64 log_root_transid; 346 __le64 total_bytes; 347 __le64 bytes_used; 348 __le64 root_dir_objectid; 349 __le64 num_devices; 350 __le32 sectorsize; 351 __le32 nodesize; 352 __le32 leafsize; 353 __le32 stripesize; 354 __le32 sys_chunk_array_size; 355 __le64 chunk_root_generation; 356 __le64 compat_flags; 357 __le64 compat_ro_flags; 358 __le64 incompat_flags; 359 __le16 csum_type; 360 u8 root_level; 361 u8 chunk_root_level; 362 u8 log_root_level; 363 struct btrfs_dev_item dev_item; 364 365 char label[BTRFS_LABEL_SIZE]; 366 367 /* future expansion */ 368 __le64 reserved[32]; 369 u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; 370 } __attribute__ ((__packed__)); 371 372 /* 373 * Compat flags that we support. If any incompat flags are set other than the 374 * ones specified below then we will fail to mount 375 */ 376 #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) 377 #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (2ULL << 0) 378 379 #define BTRFS_FEATURE_COMPAT_SUPP 0ULL 380 #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL 381 #define BTRFS_FEATURE_INCOMPAT_SUPP \ 382 (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ 383 BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL) 384 385 /* 386 * A leaf is full of items. offset and size tell us where to find 387 * the item in the leaf (relative to the start of the data area) 388 */ 389 struct btrfs_item { 390 struct btrfs_disk_key key; 391 __le32 offset; 392 __le32 size; 393 } __attribute__ ((__packed__)); 394 395 /* 396 * leaves have an item area and a data area: 397 * [item0, item1....itemN] [free space] [dataN...data1, data0] 398 * 399 * The data is separate from the items to get the keys closer together 400 * during searches. 401 */ 402 struct btrfs_leaf { 403 struct btrfs_header header; 404 struct btrfs_item items[]; 405 } __attribute__ ((__packed__)); 406 407 /* 408 * all non-leaf blocks are nodes, they hold only keys and pointers to 409 * other blocks 410 */ 411 struct btrfs_key_ptr { 412 struct btrfs_disk_key key; 413 __le64 blockptr; 414 __le64 generation; 415 } __attribute__ ((__packed__)); 416 417 struct btrfs_node { 418 struct btrfs_header header; 419 struct btrfs_key_ptr ptrs[]; 420 } __attribute__ ((__packed__)); 421 422 /* 423 * btrfs_paths remember the path taken from the root down to the leaf. 424 * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point 425 * to any other levels that are present. 426 * 427 * The slots array records the index of the item or block pointer 428 * used while walking the tree. 429 */ 430 struct btrfs_path { 431 struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; 432 int slots[BTRFS_MAX_LEVEL]; 433 /* if there is real range locking, this locks field will change */ 434 int locks[BTRFS_MAX_LEVEL]; 435 int reada; 436 /* keep some upper locks as we walk down */ 437 int lowest_level; 438 439 /* 440 * set by btrfs_split_item, tells search_slot to keep all locks 441 * and to force calls to keep space in the nodes 442 */ 443 unsigned int search_for_split:1; 444 unsigned int keep_locks:1; 445 unsigned int skip_locking:1; 446 unsigned int leave_spinning:1; 447 unsigned int search_commit_root:1; 448 }; 449 450 /* 451 * items in the extent btree are used to record the objectid of the 452 * owner of the block and the number of references 453 */ 454 455 struct btrfs_extent_item { 456 __le64 refs; 457 __le64 generation; 458 __le64 flags; 459 } __attribute__ ((__packed__)); 460 461 struct btrfs_extent_item_v0 { 462 __le32 refs; 463 } __attribute__ ((__packed__)); 464 465 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ 466 sizeof(struct btrfs_item)) 467 468 #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) 469 #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) 470 471 /* following flags only apply to tree blocks */ 472 473 /* use full backrefs for extent pointers in the block */ 474 #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) 475 476 struct btrfs_tree_block_info { 477 struct btrfs_disk_key key; 478 u8 level; 479 } __attribute__ ((__packed__)); 480 481 struct btrfs_extent_data_ref { 482 __le64 root; 483 __le64 objectid; 484 __le64 offset; 485 __le32 count; 486 } __attribute__ ((__packed__)); 487 488 struct btrfs_shared_data_ref { 489 __le32 count; 490 } __attribute__ ((__packed__)); 491 492 struct btrfs_extent_inline_ref { 493 u8 type; 494 __le64 offset; 495 } __attribute__ ((__packed__)); 496 497 /* old style backrefs item */ 498 struct btrfs_extent_ref_v0 { 499 __le64 root; 500 __le64 generation; 501 __le64 objectid; 502 __le32 count; 503 } __attribute__ ((__packed__)); 504 505 506 /* dev extents record free space on individual devices. The owner 507 * field points back to the chunk allocation mapping tree that allocated 508 * the extent. The chunk tree uuid field is a way to double check the owner 509 */ 510 struct btrfs_dev_extent { 511 __le64 chunk_tree; 512 __le64 chunk_objectid; 513 __le64 chunk_offset; 514 __le64 length; 515 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 516 } __attribute__ ((__packed__)); 517 518 struct btrfs_inode_ref { 519 __le64 index; 520 __le16 name_len; 521 /* name goes here */ 522 } __attribute__ ((__packed__)); 523 524 struct btrfs_timespec { 525 __le64 sec; 526 __le32 nsec; 527 } __attribute__ ((__packed__)); 528 529 enum btrfs_compression_type { 530 BTRFS_COMPRESS_NONE = 0, 531 BTRFS_COMPRESS_ZLIB = 1, 532 BTRFS_COMPRESS_LAST = 2, 533 }; 534 535 struct btrfs_inode_item { 536 /* nfs style generation number */ 537 __le64 generation; 538 /* transid that last touched this inode */ 539 __le64 transid; 540 __le64 size; 541 __le64 nbytes; 542 __le64 block_group; 543 __le32 nlink; 544 __le32 uid; 545 __le32 gid; 546 __le32 mode; 547 __le64 rdev; 548 __le64 flags; 549 550 /* modification sequence number for NFS */ 551 __le64 sequence; 552 553 /* 554 * a little future expansion, for more than this we can 555 * just grow the inode item and version it 556 */ 557 __le64 reserved[4]; 558 struct btrfs_timespec atime; 559 struct btrfs_timespec ctime; 560 struct btrfs_timespec mtime; 561 struct btrfs_timespec otime; 562 } __attribute__ ((__packed__)); 563 564 struct btrfs_dir_log_item { 565 __le64 end; 566 } __attribute__ ((__packed__)); 567 568 struct btrfs_dir_item { 569 struct btrfs_disk_key location; 570 __le64 transid; 571 __le16 data_len; 572 __le16 name_len; 573 u8 type; 574 } __attribute__ ((__packed__)); 575 576 struct btrfs_root_item { 577 struct btrfs_inode_item inode; 578 __le64 generation; 579 __le64 root_dirid; 580 __le64 bytenr; 581 __le64 byte_limit; 582 __le64 bytes_used; 583 __le64 last_snapshot; 584 __le64 flags; 585 __le32 refs; 586 struct btrfs_disk_key drop_progress; 587 u8 drop_level; 588 u8 level; 589 } __attribute__ ((__packed__)); 590 591 /* 592 * this is used for both forward and backward root refs 593 */ 594 struct btrfs_root_ref { 595 __le64 dirid; 596 __le64 sequence; 597 __le16 name_len; 598 } __attribute__ ((__packed__)); 599 600 #define BTRFS_FILE_EXTENT_INLINE 0 601 #define BTRFS_FILE_EXTENT_REG 1 602 #define BTRFS_FILE_EXTENT_PREALLOC 2 603 604 struct btrfs_file_extent_item { 605 /* 606 * transaction id that created this extent 607 */ 608 __le64 generation; 609 /* 610 * max number of bytes to hold this extent in ram 611 * when we split a compressed extent we can't know how big 612 * each of the resulting pieces will be. So, this is 613 * an upper limit on the size of the extent in ram instead of 614 * an exact limit. 615 */ 616 __le64 ram_bytes; 617 618 /* 619 * 32 bits for the various ways we might encode the data, 620 * including compression and encryption. If any of these 621 * are set to something a given disk format doesn't understand 622 * it is treated like an incompat flag for reading and writing, 623 * but not for stat. 624 */ 625 u8 compression; 626 u8 encryption; 627 __le16 other_encoding; /* spare for later use */ 628 629 /* are we inline data or a real extent? */ 630 u8 type; 631 632 /* 633 * disk space consumed by the extent, checksum blocks are included 634 * in these numbers 635 */ 636 __le64 disk_bytenr; 637 __le64 disk_num_bytes; 638 /* 639 * the logical offset in file blocks (no csums) 640 * this extent record is for. This allows a file extent to point 641 * into the middle of an existing extent on disk, sharing it 642 * between two snapshots (useful if some bytes in the middle of the 643 * extent have changed 644 */ 645 __le64 offset; 646 /* 647 * the logical number of file blocks (no csums included). This 648 * always reflects the size uncompressed and without encoding. 649 */ 650 __le64 num_bytes; 651 652 } __attribute__ ((__packed__)); 653 654 struct btrfs_csum_item { 655 u8 csum; 656 } __attribute__ ((__packed__)); 657 658 /* different types of block groups (and chunks) */ 659 #define BTRFS_BLOCK_GROUP_DATA (1 << 0) 660 #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) 661 #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) 662 #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) 663 #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) 664 #define BTRFS_BLOCK_GROUP_DUP (1 << 5) 665 #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) 666 667 struct btrfs_block_group_item { 668 __le64 used; 669 __le64 chunk_objectid; 670 __le64 flags; 671 } __attribute__ ((__packed__)); 672 673 struct btrfs_space_info { 674 u64 flags; 675 676 u64 total_bytes; /* total bytes in the space */ 677 u64 bytes_used; /* total bytes used on disk */ 678 u64 bytes_pinned; /* total bytes pinned, will be freed when the 679 transaction finishes */ 680 u64 bytes_reserved; /* total bytes the allocator has reserved for 681 current allocations */ 682 u64 bytes_readonly; /* total bytes that are read only */ 683 u64 bytes_super; /* total bytes reserved for the super blocks */ 684 u64 bytes_root; /* the number of bytes needed to commit a 685 transaction */ 686 u64 bytes_may_use; /* number of bytes that may be used for 687 delalloc/allocations */ 688 u64 bytes_delalloc; /* number of bytes currently reserved for 689 delayed allocation */ 690 691 int full; /* indicates that we cannot allocate any more 692 chunks for this space */ 693 int force_alloc; /* set if we need to force a chunk alloc for 694 this space */ 695 int force_delalloc; /* make people start doing filemap_flush until 696 we're under a threshold */ 697 698 struct list_head list; 699 700 /* for controlling how we free up space for allocations */ 701 wait_queue_head_t allocate_wait; 702 wait_queue_head_t flush_wait; 703 int allocating_chunk; 704 int flushing; 705 706 /* for block groups in our same type */ 707 struct list_head block_groups; 708 spinlock_t lock; 709 struct rw_semaphore groups_sem; 710 atomic_t caching_threads; 711 }; 712 713 /* 714 * free clusters are used to claim free space in relatively large chunks, 715 * allowing us to do less seeky writes. They are used for all metadata 716 * allocations and data allocations in ssd mode. 717 */ 718 struct btrfs_free_cluster { 719 spinlock_t lock; 720 spinlock_t refill_lock; 721 struct rb_root root; 722 723 /* largest extent in this cluster */ 724 u64 max_size; 725 726 /* first extent starting offset */ 727 u64 window_start; 728 729 /* if this cluster simply points at a bitmap in the block group */ 730 bool points_to_bitmap; 731 732 struct btrfs_block_group_cache *block_group; 733 /* 734 * when a cluster is allocated from a block group, we put the 735 * cluster onto a list in the block group so that it can 736 * be freed before the block group is freed. 737 */ 738 struct list_head block_group_list; 739 }; 740 741 enum btrfs_caching_type { 742 BTRFS_CACHE_NO = 0, 743 BTRFS_CACHE_STARTED = 1, 744 BTRFS_CACHE_FINISHED = 2, 745 }; 746 747 struct btrfs_caching_control { 748 struct list_head list; 749 struct mutex mutex; 750 wait_queue_head_t wait; 751 struct btrfs_block_group_cache *block_group; 752 u64 progress; 753 atomic_t count; 754 }; 755 756 struct btrfs_block_group_cache { 757 struct btrfs_key key; 758 struct btrfs_block_group_item item; 759 struct btrfs_fs_info *fs_info; 760 spinlock_t lock; 761 u64 pinned; 762 u64 reserved; 763 u64 bytes_super; 764 u64 flags; 765 u64 sectorsize; 766 int extents_thresh; 767 int free_extents; 768 int total_bitmaps; 769 int ro; 770 int dirty; 771 772 /* cache tracking stuff */ 773 int cached; 774 struct btrfs_caching_control *caching_ctl; 775 u64 last_byte_to_unpin; 776 777 struct btrfs_space_info *space_info; 778 779 /* free space cache stuff */ 780 spinlock_t tree_lock; 781 struct rb_root free_space_offset; 782 u64 free_space; 783 784 /* block group cache stuff */ 785 struct rb_node cache_node; 786 787 /* for block groups in the same raid type */ 788 struct list_head list; 789 790 /* usage count */ 791 atomic_t count; 792 793 /* List of struct btrfs_free_clusters for this block group. 794 * Today it will only have one thing on it, but that may change 795 */ 796 struct list_head cluster_list; 797 }; 798 799 struct reloc_control; 800 struct btrfs_device; 801 struct btrfs_fs_devices; 802 struct btrfs_fs_info { 803 u8 fsid[BTRFS_FSID_SIZE]; 804 u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; 805 struct btrfs_root *extent_root; 806 struct btrfs_root *tree_root; 807 struct btrfs_root *chunk_root; 808 struct btrfs_root *dev_root; 809 struct btrfs_root *fs_root; 810 struct btrfs_root *csum_root; 811 812 /* the log root tree is a directory of all the other log roots */ 813 struct btrfs_root *log_root_tree; 814 815 spinlock_t fs_roots_radix_lock; 816 struct radix_tree_root fs_roots_radix; 817 818 /* block group cache stuff */ 819 spinlock_t block_group_cache_lock; 820 struct rb_root block_group_cache_tree; 821 822 struct extent_io_tree freed_extents[2]; 823 struct extent_io_tree *pinned_extents; 824 825 /* logical->physical extent mapping */ 826 struct btrfs_mapping_tree mapping_tree; 827 828 u64 generation; 829 u64 last_trans_committed; 830 831 /* 832 * this is updated to the current trans every time a full commit 833 * is required instead of the faster short fsync log commits 834 */ 835 u64 last_trans_log_full_commit; 836 u64 open_ioctl_trans; 837 unsigned long mount_opt; 838 u64 max_inline; 839 u64 alloc_start; 840 struct btrfs_transaction *running_transaction; 841 wait_queue_head_t transaction_throttle; 842 wait_queue_head_t transaction_wait; 843 wait_queue_head_t async_submit_wait; 844 845 struct btrfs_super_block super_copy; 846 struct btrfs_super_block super_for_commit; 847 struct block_device *__bdev; 848 struct super_block *sb; 849 struct inode *btree_inode; 850 struct backing_dev_info bdi; 851 struct mutex trans_mutex; 852 struct mutex tree_log_mutex; 853 struct mutex transaction_kthread_mutex; 854 struct mutex cleaner_mutex; 855 struct mutex chunk_mutex; 856 struct mutex volume_mutex; 857 /* 858 * this protects the ordered operations list only while we are 859 * processing all of the entries on it. This way we make 860 * sure the commit code doesn't find the list temporarily empty 861 * because another function happens to be doing non-waiting preflush 862 * before jumping into the main commit. 863 */ 864 struct mutex ordered_operations_mutex; 865 struct rw_semaphore extent_commit_sem; 866 867 struct rw_semaphore cleanup_work_sem; 868 869 struct rw_semaphore subvol_sem; 870 struct srcu_struct subvol_srcu; 871 872 struct list_head trans_list; 873 struct list_head hashers; 874 struct list_head dead_roots; 875 struct list_head caching_block_groups; 876 877 spinlock_t delayed_iput_lock; 878 struct list_head delayed_iputs; 879 880 atomic_t nr_async_submits; 881 atomic_t async_submit_draining; 882 atomic_t nr_async_bios; 883 atomic_t async_delalloc_pages; 884 885 /* 886 * this is used by the balancing code to wait for all the pending 887 * ordered extents 888 */ 889 spinlock_t ordered_extent_lock; 890 891 /* 892 * all of the data=ordered extents pending writeback 893 * these can span multiple transactions and basically include 894 * every dirty data page that isn't from nodatacow 895 */ 896 struct list_head ordered_extents; 897 898 /* 899 * all of the inodes that have delalloc bytes. It is possible for 900 * this list to be empty even when there is still dirty data=ordered 901 * extents waiting to finish IO. 902 */ 903 struct list_head delalloc_inodes; 904 905 /* 906 * special rename and truncate targets that must be on disk before 907 * we're allowed to commit. This is basically the ext3 style 908 * data=ordered list. 909 */ 910 struct list_head ordered_operations; 911 912 /* 913 * there is a pool of worker threads for checksumming during writes 914 * and a pool for checksumming after reads. This is because readers 915 * can run with FS locks held, and the writers may be waiting for 916 * those locks. We don't want ordering in the pending list to cause 917 * deadlocks, and so the two are serviced separately. 918 * 919 * A third pool does submit_bio to avoid deadlocking with the other 920 * two 921 */ 922 struct btrfs_workers generic_worker; 923 struct btrfs_workers workers; 924 struct btrfs_workers delalloc_workers; 925 struct btrfs_workers endio_workers; 926 struct btrfs_workers endio_meta_workers; 927 struct btrfs_workers endio_meta_write_workers; 928 struct btrfs_workers endio_write_workers; 929 struct btrfs_workers submit_workers; 930 struct btrfs_workers enospc_workers; 931 /* 932 * fixup workers take dirty pages that didn't properly go through 933 * the cow mechanism and make them safe to write. It happens 934 * for the sys_munmap function call path 935 */ 936 struct btrfs_workers fixup_workers; 937 struct task_struct *transaction_kthread; 938 struct task_struct *cleaner_kthread; 939 int thread_pool_size; 940 941 struct kobject super_kobj; 942 struct completion kobj_unregister; 943 int do_barriers; 944 int closing; 945 int log_root_recovering; 946 947 u64 total_pinned; 948 949 /* protected by the delalloc lock, used to keep from writing 950 * metadata until there is a nice batch 951 */ 952 u64 dirty_metadata_bytes; 953 struct list_head dirty_cowonly_roots; 954 955 struct btrfs_fs_devices *fs_devices; 956 957 /* 958 * the space_info list is almost entirely read only. It only changes 959 * when we add a new raid type to the FS, and that happens 960 * very rarely. RCU is used to protect it. 961 */ 962 struct list_head space_info; 963 964 struct reloc_control *reloc_ctl; 965 966 spinlock_t delalloc_lock; 967 spinlock_t new_trans_lock; 968 u64 delalloc_bytes; 969 970 /* data_alloc_cluster is only used in ssd mode */ 971 struct btrfs_free_cluster data_alloc_cluster; 972 973 /* all metadata allocations go through this cluster */ 974 struct btrfs_free_cluster meta_alloc_cluster; 975 976 spinlock_t ref_cache_lock; 977 u64 total_ref_cache_size; 978 979 u64 avail_data_alloc_bits; 980 u64 avail_metadata_alloc_bits; 981 u64 avail_system_alloc_bits; 982 u64 data_alloc_profile; 983 u64 metadata_alloc_profile; 984 u64 system_alloc_profile; 985 986 unsigned data_chunk_allocations; 987 unsigned metadata_ratio; 988 989 void *bdev_holder; 990 }; 991 992 /* 993 * in ram representation of the tree. extent_root is used for all allocations 994 * and for the extent tree extent_root root. 995 */ 996 struct btrfs_root { 997 struct extent_buffer *node; 998 999 /* the node lock is held while changing the node pointer */ 1000 spinlock_t node_lock; 1001 1002 struct extent_buffer *commit_root; 1003 struct btrfs_root *log_root; 1004 struct btrfs_root *reloc_root; 1005 1006 struct btrfs_root_item root_item; 1007 struct btrfs_key root_key; 1008 struct btrfs_fs_info *fs_info; 1009 struct extent_io_tree dirty_log_pages; 1010 1011 struct kobject root_kobj; 1012 struct completion kobj_unregister; 1013 struct mutex objectid_mutex; 1014 1015 struct mutex log_mutex; 1016 wait_queue_head_t log_writer_wait; 1017 wait_queue_head_t log_commit_wait[2]; 1018 atomic_t log_writers; 1019 atomic_t log_commit[2]; 1020 unsigned long log_transid; 1021 unsigned long last_log_commit; 1022 unsigned long log_batch; 1023 pid_t log_start_pid; 1024 bool log_multiple_pids; 1025 1026 u64 objectid; 1027 u64 last_trans; 1028 1029 /* data allocations are done in sectorsize units */ 1030 u32 sectorsize; 1031 1032 /* node allocations are done in nodesize units */ 1033 u32 nodesize; 1034 1035 /* leaf allocations are done in leafsize units */ 1036 u32 leafsize; 1037 1038 u32 stripesize; 1039 1040 u32 type; 1041 1042 u64 highest_objectid; 1043 int ref_cows; 1044 int track_dirty; 1045 int in_radix; 1046 int clean_orphans; 1047 1048 u64 defrag_trans_start; 1049 struct btrfs_key defrag_progress; 1050 struct btrfs_key defrag_max; 1051 int defrag_running; 1052 char *name; 1053 int in_sysfs; 1054 1055 /* the dirty list is only used by non-reference counted roots */ 1056 struct list_head dirty_list; 1057 1058 struct list_head root_list; 1059 1060 spinlock_t list_lock; 1061 struct list_head orphan_list; 1062 1063 spinlock_t inode_lock; 1064 /* red-black tree that keeps track of in-memory inodes */ 1065 struct rb_root inode_tree; 1066 1067 /* 1068 * right now this just gets used so that a root has its own devid 1069 * for stat. It may be used for more later 1070 */ 1071 struct super_block anon_super; 1072 }; 1073 1074 /* 1075 * inode items have the data typically returned from stat and store other 1076 * info about object characteristics. There is one for every file and dir in 1077 * the FS 1078 */ 1079 #define BTRFS_INODE_ITEM_KEY 1 1080 #define BTRFS_INODE_REF_KEY 12 1081 #define BTRFS_XATTR_ITEM_KEY 24 1082 #define BTRFS_ORPHAN_ITEM_KEY 48 1083 /* reserve 2-15 close to the inode for later flexibility */ 1084 1085 /* 1086 * dir items are the name -> inode pointers in a directory. There is one 1087 * for every name in a directory. 1088 */ 1089 #define BTRFS_DIR_LOG_ITEM_KEY 60 1090 #define BTRFS_DIR_LOG_INDEX_KEY 72 1091 #define BTRFS_DIR_ITEM_KEY 84 1092 #define BTRFS_DIR_INDEX_KEY 96 1093 /* 1094 * extent data is for file data 1095 */ 1096 #define BTRFS_EXTENT_DATA_KEY 108 1097 1098 /* 1099 * extent csums are stored in a separate tree and hold csums for 1100 * an entire extent on disk. 1101 */ 1102 #define BTRFS_EXTENT_CSUM_KEY 128 1103 1104 /* 1105 * root items point to tree roots. They are typically in the root 1106 * tree used by the super block to find all the other trees 1107 */ 1108 #define BTRFS_ROOT_ITEM_KEY 132 1109 1110 /* 1111 * root backrefs tie subvols and snapshots to the directory entries that 1112 * reference them 1113 */ 1114 #define BTRFS_ROOT_BACKREF_KEY 144 1115 1116 /* 1117 * root refs make a fast index for listing all of the snapshots and 1118 * subvolumes referenced by a given root. They point directly to the 1119 * directory item in the root that references the subvol 1120 */ 1121 #define BTRFS_ROOT_REF_KEY 156 1122 1123 /* 1124 * extent items are in the extent map tree. These record which blocks 1125 * are used, and how many references there are to each block 1126 */ 1127 #define BTRFS_EXTENT_ITEM_KEY 168 1128 1129 #define BTRFS_TREE_BLOCK_REF_KEY 176 1130 1131 #define BTRFS_EXTENT_DATA_REF_KEY 178 1132 1133 #define BTRFS_EXTENT_REF_V0_KEY 180 1134 1135 #define BTRFS_SHARED_BLOCK_REF_KEY 182 1136 1137 #define BTRFS_SHARED_DATA_REF_KEY 184 1138 1139 /* 1140 * block groups give us hints into the extent allocation trees. Which 1141 * blocks are free etc etc 1142 */ 1143 #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 1144 1145 #define BTRFS_DEV_EXTENT_KEY 204 1146 #define BTRFS_DEV_ITEM_KEY 216 1147 #define BTRFS_CHUNK_ITEM_KEY 228 1148 1149 /* 1150 * string items are for debugging. They just store a short string of 1151 * data in the FS 1152 */ 1153 #define BTRFS_STRING_ITEM_KEY 253 1154 1155 #define BTRFS_MOUNT_NODATASUM (1 << 0) 1156 #define BTRFS_MOUNT_NODATACOW (1 << 1) 1157 #define BTRFS_MOUNT_NOBARRIER (1 << 2) 1158 #define BTRFS_MOUNT_SSD (1 << 3) 1159 #define BTRFS_MOUNT_DEGRADED (1 << 4) 1160 #define BTRFS_MOUNT_COMPRESS (1 << 5) 1161 #define BTRFS_MOUNT_NOTREELOG (1 << 6) 1162 #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) 1163 #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) 1164 #define BTRFS_MOUNT_NOSSD (1 << 9) 1165 #define BTRFS_MOUNT_DISCARD (1 << 10) 1166 #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) 1167 1168 #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) 1169 #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) 1170 #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ 1171 BTRFS_MOUNT_##opt) 1172 /* 1173 * Inode flags 1174 */ 1175 #define BTRFS_INODE_NODATASUM (1 << 0) 1176 #define BTRFS_INODE_NODATACOW (1 << 1) 1177 #define BTRFS_INODE_READONLY (1 << 2) 1178 #define BTRFS_INODE_NOCOMPRESS (1 << 3) 1179 #define BTRFS_INODE_PREALLOC (1 << 4) 1180 #define BTRFS_INODE_SYNC (1 << 5) 1181 #define BTRFS_INODE_IMMUTABLE (1 << 6) 1182 #define BTRFS_INODE_APPEND (1 << 7) 1183 #define BTRFS_INODE_NODUMP (1 << 8) 1184 #define BTRFS_INODE_NOATIME (1 << 9) 1185 #define BTRFS_INODE_DIRSYNC (1 << 10) 1186 1187 /* some macros to generate set/get funcs for the struct fields. This 1188 * assumes there is a lefoo_to_cpu for every type, so lets make a simple 1189 * one for u8: 1190 */ 1191 #define le8_to_cpu(v) (v) 1192 #define cpu_to_le8(v) (v) 1193 #define __le8 u8 1194 1195 #define read_eb_member(eb, ptr, type, member, result) ( \ 1196 read_extent_buffer(eb, (char *)(result), \ 1197 ((unsigned long)(ptr)) + \ 1198 offsetof(type, member), \ 1199 sizeof(((type *)0)->member))) 1200 1201 #define write_eb_member(eb, ptr, type, member, result) ( \ 1202 write_extent_buffer(eb, (char *)(result), \ 1203 ((unsigned long)(ptr)) + \ 1204 offsetof(type, member), \ 1205 sizeof(((type *)0)->member))) 1206 1207 #ifndef BTRFS_SETGET_FUNCS 1208 #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ 1209 u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ 1210 void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); 1211 #endif 1212 1213 #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ 1214 static inline u##bits btrfs_##name(struct extent_buffer *eb) \ 1215 { \ 1216 type *p = kmap_atomic(eb->first_page, KM_USER0); \ 1217 u##bits res = le##bits##_to_cpu(p->member); \ 1218 kunmap_atomic(p, KM_USER0); \ 1219 return res; \ 1220 } \ 1221 static inline void btrfs_set_##name(struct extent_buffer *eb, \ 1222 u##bits val) \ 1223 { \ 1224 type *p = kmap_atomic(eb->first_page, KM_USER0); \ 1225 p->member = cpu_to_le##bits(val); \ 1226 kunmap_atomic(p, KM_USER0); \ 1227 } 1228 1229 #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ 1230 static inline u##bits btrfs_##name(type *s) \ 1231 { \ 1232 return le##bits##_to_cpu(s->member); \ 1233 } \ 1234 static inline void btrfs_set_##name(type *s, u##bits val) \ 1235 { \ 1236 s->member = cpu_to_le##bits(val); \ 1237 } 1238 1239 BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); 1240 BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); 1241 BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); 1242 BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); 1243 BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); 1244 BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, 1245 start_offset, 64); 1246 BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); 1247 BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); 1248 BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); 1249 BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); 1250 BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); 1251 BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); 1252 1253 BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); 1254 BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, 1255 total_bytes, 64); 1256 BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, 1257 bytes_used, 64); 1258 BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, 1259 io_align, 32); 1260 BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, 1261 io_width, 32); 1262 BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, 1263 sector_size, 32); 1264 BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); 1265 BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, 1266 dev_group, 32); 1267 BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, 1268 seek_speed, 8); 1269 BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, 1270 bandwidth, 8); 1271 BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, 1272 generation, 64); 1273 1274 static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) 1275 { 1276 return (char *)d + offsetof(struct btrfs_dev_item, uuid); 1277 } 1278 1279 static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) 1280 { 1281 return (char *)d + offsetof(struct btrfs_dev_item, fsid); 1282 } 1283 1284 BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); 1285 BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); 1286 BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); 1287 BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); 1288 BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); 1289 BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); 1290 BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); 1291 BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); 1292 BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); 1293 BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); 1294 BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); 1295 1296 static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) 1297 { 1298 return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); 1299 } 1300 1301 BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); 1302 BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); 1303 BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, 1304 stripe_len, 64); 1305 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, 1306 io_align, 32); 1307 BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, 1308 io_width, 32); 1309 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, 1310 sector_size, 32); 1311 BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); 1312 BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, 1313 num_stripes, 16); 1314 BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, 1315 sub_stripes, 16); 1316 BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); 1317 BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); 1318 1319 static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, 1320 int nr) 1321 { 1322 unsigned long offset = (unsigned long)c; 1323 offset += offsetof(struct btrfs_chunk, stripe); 1324 offset += nr * sizeof(struct btrfs_stripe); 1325 return (struct btrfs_stripe *)offset; 1326 } 1327 1328 static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) 1329 { 1330 return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); 1331 } 1332 1333 static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, 1334 struct btrfs_chunk *c, int nr) 1335 { 1336 return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); 1337 } 1338 1339 static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, 1340 struct btrfs_chunk *c, int nr, 1341 u64 val) 1342 { 1343 btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); 1344 } 1345 1346 static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, 1347 struct btrfs_chunk *c, int nr) 1348 { 1349 return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); 1350 } 1351 1352 static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, 1353 struct btrfs_chunk *c, int nr, 1354 u64 val) 1355 { 1356 btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); 1357 } 1358 1359 /* struct btrfs_block_group_item */ 1360 BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, 1361 used, 64); 1362 BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, 1363 used, 64); 1364 BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, 1365 struct btrfs_block_group_item, chunk_objectid, 64); 1366 1367 BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, 1368 struct btrfs_block_group_item, chunk_objectid, 64); 1369 BTRFS_SETGET_FUNCS(disk_block_group_flags, 1370 struct btrfs_block_group_item, flags, 64); 1371 BTRFS_SETGET_STACK_FUNCS(block_group_flags, 1372 struct btrfs_block_group_item, flags, 64); 1373 1374 /* struct btrfs_inode_ref */ 1375 BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); 1376 BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); 1377 1378 /* struct btrfs_inode_item */ 1379 BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); 1380 BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); 1381 BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); 1382 BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); 1383 BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); 1384 BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); 1385 BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); 1386 BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); 1387 BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); 1388 BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); 1389 BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); 1390 BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); 1391 1392 static inline struct btrfs_timespec * 1393 btrfs_inode_atime(struct btrfs_inode_item *inode_item) 1394 { 1395 unsigned long ptr = (unsigned long)inode_item; 1396 ptr += offsetof(struct btrfs_inode_item, atime); 1397 return (struct btrfs_timespec *)ptr; 1398 } 1399 1400 static inline struct btrfs_timespec * 1401 btrfs_inode_mtime(struct btrfs_inode_item *inode_item) 1402 { 1403 unsigned long ptr = (unsigned long)inode_item; 1404 ptr += offsetof(struct btrfs_inode_item, mtime); 1405 return (struct btrfs_timespec *)ptr; 1406 } 1407 1408 static inline struct btrfs_timespec * 1409 btrfs_inode_ctime(struct btrfs_inode_item *inode_item) 1410 { 1411 unsigned long ptr = (unsigned long)inode_item; 1412 ptr += offsetof(struct btrfs_inode_item, ctime); 1413 return (struct btrfs_timespec *)ptr; 1414 } 1415 1416 static inline struct btrfs_timespec * 1417 btrfs_inode_otime(struct btrfs_inode_item *inode_item) 1418 { 1419 unsigned long ptr = (unsigned long)inode_item; 1420 ptr += offsetof(struct btrfs_inode_item, otime); 1421 return (struct btrfs_timespec *)ptr; 1422 } 1423 1424 BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); 1425 BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); 1426 1427 /* struct btrfs_dev_extent */ 1428 BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, 1429 chunk_tree, 64); 1430 BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, 1431 chunk_objectid, 64); 1432 BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, 1433 chunk_offset, 64); 1434 BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); 1435 1436 static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) 1437 { 1438 unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); 1439 return (u8 *)((unsigned long)dev + ptr); 1440 } 1441 1442 BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); 1443 BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, 1444 generation, 64); 1445 BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); 1446 1447 BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); 1448 1449 1450 BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); 1451 1452 static inline void btrfs_tree_block_key(struct extent_buffer *eb, 1453 struct btrfs_tree_block_info *item, 1454 struct btrfs_disk_key *key) 1455 { 1456 read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1457 } 1458 1459 static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, 1460 struct btrfs_tree_block_info *item, 1461 struct btrfs_disk_key *key) 1462 { 1463 write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); 1464 } 1465 1466 BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, 1467 root, 64); 1468 BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, 1469 objectid, 64); 1470 BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, 1471 offset, 64); 1472 BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, 1473 count, 32); 1474 1475 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, 1476 count, 32); 1477 1478 BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, 1479 type, 8); 1480 BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, 1481 offset, 64); 1482 1483 static inline u32 btrfs_extent_inline_ref_size(int type) 1484 { 1485 if (type == BTRFS_TREE_BLOCK_REF_KEY || 1486 type == BTRFS_SHARED_BLOCK_REF_KEY) 1487 return sizeof(struct btrfs_extent_inline_ref); 1488 if (type == BTRFS_SHARED_DATA_REF_KEY) 1489 return sizeof(struct btrfs_shared_data_ref) + 1490 sizeof(struct btrfs_extent_inline_ref); 1491 if (type == BTRFS_EXTENT_DATA_REF_KEY) 1492 return sizeof(struct btrfs_extent_data_ref) + 1493 offsetof(struct btrfs_extent_inline_ref, offset); 1494 BUG(); 1495 return 0; 1496 } 1497 1498 BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); 1499 BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, 1500 generation, 64); 1501 BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); 1502 BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); 1503 1504 /* struct btrfs_node */ 1505 BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); 1506 BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); 1507 1508 static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) 1509 { 1510 unsigned long ptr; 1511 ptr = offsetof(struct btrfs_node, ptrs) + 1512 sizeof(struct btrfs_key_ptr) * nr; 1513 return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); 1514 } 1515 1516 static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, 1517 int nr, u64 val) 1518 { 1519 unsigned long ptr; 1520 ptr = offsetof(struct btrfs_node, ptrs) + 1521 sizeof(struct btrfs_key_ptr) * nr; 1522 btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); 1523 } 1524 1525 static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) 1526 { 1527 unsigned long ptr; 1528 ptr = offsetof(struct btrfs_node, ptrs) + 1529 sizeof(struct btrfs_key_ptr) * nr; 1530 return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); 1531 } 1532 1533 static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, 1534 int nr, u64 val) 1535 { 1536 unsigned long ptr; 1537 ptr = offsetof(struct btrfs_node, ptrs) + 1538 sizeof(struct btrfs_key_ptr) * nr; 1539 btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); 1540 } 1541 1542 static inline unsigned long btrfs_node_key_ptr_offset(int nr) 1543 { 1544 return offsetof(struct btrfs_node, ptrs) + 1545 sizeof(struct btrfs_key_ptr) * nr; 1546 } 1547 1548 void btrfs_node_key(struct extent_buffer *eb, 1549 struct btrfs_disk_key *disk_key, int nr); 1550 1551 static inline void btrfs_set_node_key(struct extent_buffer *eb, 1552 struct btrfs_disk_key *disk_key, int nr) 1553 { 1554 unsigned long ptr; 1555 ptr = btrfs_node_key_ptr_offset(nr); 1556 write_eb_member(eb, (struct btrfs_key_ptr *)ptr, 1557 struct btrfs_key_ptr, key, disk_key); 1558 } 1559 1560 /* struct btrfs_item */ 1561 BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); 1562 BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); 1563 1564 static inline unsigned long btrfs_item_nr_offset(int nr) 1565 { 1566 return offsetof(struct btrfs_leaf, items) + 1567 sizeof(struct btrfs_item) * nr; 1568 } 1569 1570 static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, 1571 int nr) 1572 { 1573 return (struct btrfs_item *)btrfs_item_nr_offset(nr); 1574 } 1575 1576 static inline u32 btrfs_item_end(struct extent_buffer *eb, 1577 struct btrfs_item *item) 1578 { 1579 return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); 1580 } 1581 1582 static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) 1583 { 1584 return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); 1585 } 1586 1587 static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) 1588 { 1589 return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); 1590 } 1591 1592 static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) 1593 { 1594 return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); 1595 } 1596 1597 static inline void btrfs_item_key(struct extent_buffer *eb, 1598 struct btrfs_disk_key *disk_key, int nr) 1599 { 1600 struct btrfs_item *item = btrfs_item_nr(eb, nr); 1601 read_eb_member(eb, item, struct btrfs_item, key, disk_key); 1602 } 1603 1604 static inline void btrfs_set_item_key(struct extent_buffer *eb, 1605 struct btrfs_disk_key *disk_key, int nr) 1606 { 1607 struct btrfs_item *item = btrfs_item_nr(eb, nr); 1608 write_eb_member(eb, item, struct btrfs_item, key, disk_key); 1609 } 1610 1611 BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); 1612 1613 /* 1614 * struct btrfs_root_ref 1615 */ 1616 BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); 1617 BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); 1618 BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); 1619 1620 /* struct btrfs_dir_item */ 1621 BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); 1622 BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); 1623 BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); 1624 BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); 1625 1626 static inline void btrfs_dir_item_key(struct extent_buffer *eb, 1627 struct btrfs_dir_item *item, 1628 struct btrfs_disk_key *key) 1629 { 1630 read_eb_member(eb, item, struct btrfs_dir_item, location, key); 1631 } 1632 1633 static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, 1634 struct btrfs_dir_item *item, 1635 struct btrfs_disk_key *key) 1636 { 1637 write_eb_member(eb, item, struct btrfs_dir_item, location, key); 1638 } 1639 1640 /* struct btrfs_disk_key */ 1641 BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, 1642 objectid, 64); 1643 BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); 1644 BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); 1645 1646 static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, 1647 struct btrfs_disk_key *disk) 1648 { 1649 cpu->offset = le64_to_cpu(disk->offset); 1650 cpu->type = disk->type; 1651 cpu->objectid = le64_to_cpu(disk->objectid); 1652 } 1653 1654 static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, 1655 struct btrfs_key *cpu) 1656 { 1657 disk->offset = cpu_to_le64(cpu->offset); 1658 disk->type = cpu->type; 1659 disk->objectid = cpu_to_le64(cpu->objectid); 1660 } 1661 1662 static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, 1663 struct btrfs_key *key, int nr) 1664 { 1665 struct btrfs_disk_key disk_key; 1666 btrfs_node_key(eb, &disk_key, nr); 1667 btrfs_disk_key_to_cpu(key, &disk_key); 1668 } 1669 1670 static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, 1671 struct btrfs_key *key, int nr) 1672 { 1673 struct btrfs_disk_key disk_key; 1674 btrfs_item_key(eb, &disk_key, nr); 1675 btrfs_disk_key_to_cpu(key, &disk_key); 1676 } 1677 1678 static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, 1679 struct btrfs_dir_item *item, 1680 struct btrfs_key *key) 1681 { 1682 struct btrfs_disk_key disk_key; 1683 btrfs_dir_item_key(eb, item, &disk_key); 1684 btrfs_disk_key_to_cpu(key, &disk_key); 1685 } 1686 1687 1688 static inline u8 btrfs_key_type(struct btrfs_key *key) 1689 { 1690 return key->type; 1691 } 1692 1693 static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) 1694 { 1695 key->type = val; 1696 } 1697 1698 /* struct btrfs_header */ 1699 BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); 1700 BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, 1701 generation, 64); 1702 BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); 1703 BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); 1704 BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); 1705 BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); 1706 1707 static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) 1708 { 1709 return (btrfs_header_flags(eb) & flag) == flag; 1710 } 1711 1712 static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) 1713 { 1714 u64 flags = btrfs_header_flags(eb); 1715 btrfs_set_header_flags(eb, flags | flag); 1716 return (flags & flag) == flag; 1717 } 1718 1719 static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) 1720 { 1721 u64 flags = btrfs_header_flags(eb); 1722 btrfs_set_header_flags(eb, flags & ~flag); 1723 return (flags & flag) == flag; 1724 } 1725 1726 static inline int btrfs_header_backref_rev(struct extent_buffer *eb) 1727 { 1728 u64 flags = btrfs_header_flags(eb); 1729 return flags >> BTRFS_BACKREF_REV_SHIFT; 1730 } 1731 1732 static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, 1733 int rev) 1734 { 1735 u64 flags = btrfs_header_flags(eb); 1736 flags &= ~BTRFS_BACKREF_REV_MASK; 1737 flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; 1738 btrfs_set_header_flags(eb, flags); 1739 } 1740 1741 static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) 1742 { 1743 unsigned long ptr = offsetof(struct btrfs_header, fsid); 1744 return (u8 *)ptr; 1745 } 1746 1747 static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) 1748 { 1749 unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); 1750 return (u8 *)ptr; 1751 } 1752 1753 static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) 1754 { 1755 unsigned long ptr = offsetof(struct btrfs_super_block, fsid); 1756 return (u8 *)ptr; 1757 } 1758 1759 static inline u8 *btrfs_header_csum(struct extent_buffer *eb) 1760 { 1761 unsigned long ptr = offsetof(struct btrfs_header, csum); 1762 return (u8 *)ptr; 1763 } 1764 1765 static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) 1766 { 1767 return NULL; 1768 } 1769 1770 static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) 1771 { 1772 return NULL; 1773 } 1774 1775 static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) 1776 { 1777 return NULL; 1778 } 1779 1780 static inline int btrfs_is_leaf(struct extent_buffer *eb) 1781 { 1782 return btrfs_header_level(eb) == 0; 1783 } 1784 1785 /* struct btrfs_root_item */ 1786 BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, 1787 generation, 64); 1788 BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); 1789 BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); 1790 BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); 1791 1792 BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, 1793 generation, 64); 1794 BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); 1795 BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); 1796 BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); 1797 BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); 1798 BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); 1799 BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); 1800 BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); 1801 BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, 1802 last_snapshot, 64); 1803 1804 /* struct btrfs_super_block */ 1805 1806 BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); 1807 BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); 1808 BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, 1809 generation, 64); 1810 BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); 1811 BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, 1812 struct btrfs_super_block, sys_chunk_array_size, 32); 1813 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, 1814 struct btrfs_super_block, chunk_root_generation, 64); 1815 BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, 1816 root_level, 8); 1817 BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, 1818 chunk_root, 64); 1819 BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, 1820 chunk_root_level, 8); 1821 BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, 1822 log_root, 64); 1823 BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, 1824 log_root_transid, 64); 1825 BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, 1826 log_root_level, 8); 1827 BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, 1828 total_bytes, 64); 1829 BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, 1830 bytes_used, 64); 1831 BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, 1832 sectorsize, 32); 1833 BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, 1834 nodesize, 32); 1835 BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, 1836 leafsize, 32); 1837 BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, 1838 stripesize, 32); 1839 BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, 1840 root_dir_objectid, 64); 1841 BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, 1842 num_devices, 64); 1843 BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, 1844 compat_flags, 64); 1845 BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, 1846 compat_ro_flags, 64); 1847 BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, 1848 incompat_flags, 64); 1849 BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, 1850 csum_type, 16); 1851 1852 static inline int btrfs_super_csum_size(struct btrfs_super_block *s) 1853 { 1854 int t = btrfs_super_csum_type(s); 1855 BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); 1856 return btrfs_csum_sizes[t]; 1857 } 1858 1859 static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) 1860 { 1861 return offsetof(struct btrfs_leaf, items); 1862 } 1863 1864 /* struct btrfs_file_extent_item */ 1865 BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); 1866 1867 static inline unsigned long 1868 btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) 1869 { 1870 unsigned long offset = (unsigned long)e; 1871 offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); 1872 return offset; 1873 } 1874 1875 static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) 1876 { 1877 return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; 1878 } 1879 1880 BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, 1881 disk_bytenr, 64); 1882 BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, 1883 generation, 64); 1884 BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, 1885 disk_num_bytes, 64); 1886 BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, 1887 offset, 64); 1888 BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, 1889 num_bytes, 64); 1890 BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, 1891 ram_bytes, 64); 1892 BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, 1893 compression, 8); 1894 BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, 1895 encryption, 8); 1896 BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, 1897 other_encoding, 16); 1898 1899 /* this returns the number of file bytes represented by the inline item. 1900 * If an item is compressed, this is the uncompressed size 1901 */ 1902 static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, 1903 struct btrfs_file_extent_item *e) 1904 { 1905 return btrfs_file_extent_ram_bytes(eb, e); 1906 } 1907 1908 /* 1909 * this returns the number of bytes used by the item on disk, minus the 1910 * size of any extent headers. If a file is compressed on disk, this is 1911 * the compressed size 1912 */ 1913 static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, 1914 struct btrfs_item *e) 1915 { 1916 unsigned long offset; 1917 offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); 1918 return btrfs_item_size(eb, e) - offset; 1919 } 1920 1921 static inline struct btrfs_root *btrfs_sb(struct super_block *sb) 1922 { 1923 return sb->s_fs_info; 1924 } 1925 1926 static inline int btrfs_set_root_name(struct btrfs_root *root, 1927 const char *name, int len) 1928 { 1929 /* if we already have a name just free it */ 1930 kfree(root->name); 1931 1932 root->name = kmalloc(len+1, GFP_KERNEL); 1933 if (!root->name) 1934 return -ENOMEM; 1935 1936 memcpy(root->name, name, len); 1937 root->name[len] = '\0'; 1938 1939 return 0; 1940 } 1941 1942 static inline u32 btrfs_level_size(struct btrfs_root *root, int level) 1943 { 1944 if (level == 0) 1945 return root->leafsize; 1946 return root->nodesize; 1947 } 1948 1949 /* helper function to cast into the data area of the leaf. */ 1950 #define btrfs_item_ptr(leaf, slot, type) \ 1951 ((type *)(btrfs_leaf_data(leaf) + \ 1952 btrfs_item_offset_nr(leaf, slot))) 1953 1954 #define btrfs_item_ptr_offset(leaf, slot) \ 1955 ((unsigned long)(btrfs_leaf_data(leaf) + \ 1956 btrfs_item_offset_nr(leaf, slot))) 1957 1958 static inline struct dentry *fdentry(struct file *file) 1959 { 1960 return file->f_path.dentry; 1961 } 1962 1963 /* extent-tree.c */ 1964 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 1965 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, 1966 struct btrfs_root *root, unsigned long count); 1967 int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); 1968 int btrfs_pin_extent(struct btrfs_root *root, 1969 u64 bytenr, u64 num, int reserved); 1970 int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, 1971 struct btrfs_root *root, struct extent_buffer *leaf); 1972 int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, 1973 struct btrfs_root *root, 1974 u64 objectid, u64 offset, u64 bytenr); 1975 int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); 1976 struct btrfs_block_group_cache *btrfs_lookup_block_group( 1977 struct btrfs_fs_info *info, 1978 u64 bytenr); 1979 void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 1980 u64 btrfs_find_block_group(struct btrfs_root *root, 1981 u64 search_start, u64 search_hint, int owner); 1982 struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, 1983 struct btrfs_root *root, u32 blocksize, 1984 u64 parent, u64 root_objectid, 1985 struct btrfs_disk_key *key, int level, 1986 u64 hint, u64 empty_size); 1987 int btrfs_free_tree_block(struct btrfs_trans_handle *trans, 1988 struct btrfs_root *root, 1989 u64 bytenr, u32 blocksize, 1990 u64 parent, u64 root_objectid, int level); 1991 struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, 1992 struct btrfs_root *root, 1993 u64 bytenr, u32 blocksize, 1994 int level); 1995 int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, 1996 struct btrfs_root *root, 1997 u64 root_objectid, u64 owner, 1998 u64 offset, struct btrfs_key *ins); 1999 int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, 2000 struct btrfs_root *root, 2001 u64 root_objectid, u64 owner, u64 offset, 2002 struct btrfs_key *ins); 2003 int btrfs_reserve_extent(struct btrfs_trans_handle *trans, 2004 struct btrfs_root *root, 2005 u64 num_bytes, u64 min_alloc_size, 2006 u64 empty_size, u64 hint_byte, 2007 u64 search_end, struct btrfs_key *ins, 2008 u64 data); 2009 int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2010 struct extent_buffer *buf, int full_backref); 2011 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2012 struct extent_buffer *buf, int full_backref); 2013 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, 2014 struct btrfs_root *root, 2015 u64 bytenr, u64 num_bytes, u64 flags, 2016 int is_data); 2017 int btrfs_free_extent(struct btrfs_trans_handle *trans, 2018 struct btrfs_root *root, 2019 u64 bytenr, u64 num_bytes, u64 parent, 2020 u64 root_objectid, u64 owner, u64 offset); 2021 2022 int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); 2023 int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, 2024 struct btrfs_root *root); 2025 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, 2026 struct btrfs_root *root); 2027 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, 2028 struct btrfs_root *root, 2029 u64 bytenr, u64 num_bytes, u64 parent, 2030 u64 root_objectid, u64 owner, u64 offset); 2031 2032 int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, 2033 struct btrfs_root *root); 2034 int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); 2035 int btrfs_free_block_groups(struct btrfs_fs_info *info); 2036 int btrfs_read_block_groups(struct btrfs_root *root); 2037 int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); 2038 int btrfs_make_block_group(struct btrfs_trans_handle *trans, 2039 struct btrfs_root *root, u64 bytes_used, 2040 u64 type, u64 chunk_objectid, u64 chunk_offset, 2041 u64 size); 2042 int btrfs_remove_block_group(struct btrfs_trans_handle *trans, 2043 struct btrfs_root *root, u64 group_start); 2044 int btrfs_prepare_block_group_relocation(struct btrfs_root *root, 2045 struct btrfs_block_group_cache *group); 2046 2047 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); 2048 void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); 2049 void btrfs_clear_space_info_full(struct btrfs_fs_info *info); 2050 2051 int btrfs_reserve_metadata_space(struct btrfs_root *root, int num_items); 2052 int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items); 2053 int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root, 2054 struct inode *inode, int num_items); 2055 int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root, 2056 struct inode *inode, int num_items); 2057 int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode, 2058 u64 bytes); 2059 void btrfs_free_reserved_data_space(struct btrfs_root *root, 2060 struct inode *inode, u64 bytes); 2061 void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode, 2062 u64 bytes); 2063 void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode, 2064 u64 bytes); 2065 /* ctree.c */ 2066 int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, 2067 int level, int *slot); 2068 int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); 2069 int btrfs_previous_item(struct btrfs_root *root, 2070 struct btrfs_path *path, u64 min_objectid, 2071 int type); 2072 int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, 2073 struct btrfs_root *root, struct btrfs_path *path, 2074 struct btrfs_key *new_key); 2075 struct extent_buffer *btrfs_root_node(struct btrfs_root *root); 2076 struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); 2077 int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, 2078 struct btrfs_key *key, int lowest_level, 2079 int cache_only, u64 min_trans); 2080 int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, 2081 struct btrfs_key *max_key, 2082 struct btrfs_path *path, int cache_only, 2083 u64 min_trans); 2084 int btrfs_cow_block(struct btrfs_trans_handle *trans, 2085 struct btrfs_root *root, struct extent_buffer *buf, 2086 struct extent_buffer *parent, int parent_slot, 2087 struct extent_buffer **cow_ret); 2088 int btrfs_copy_root(struct btrfs_trans_handle *trans, 2089 struct btrfs_root *root, 2090 struct extent_buffer *buf, 2091 struct extent_buffer **cow_ret, u64 new_root_objectid); 2092 int btrfs_block_can_be_shared(struct btrfs_root *root, 2093 struct extent_buffer *buf); 2094 int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root 2095 *root, struct btrfs_path *path, u32 data_size); 2096 int btrfs_truncate_item(struct btrfs_trans_handle *trans, 2097 struct btrfs_root *root, 2098 struct btrfs_path *path, 2099 u32 new_size, int from_end); 2100 int btrfs_split_item(struct btrfs_trans_handle *trans, 2101 struct btrfs_root *root, 2102 struct btrfs_path *path, 2103 struct btrfs_key *new_key, 2104 unsigned long split_offset); 2105 int btrfs_duplicate_item(struct btrfs_trans_handle *trans, 2106 struct btrfs_root *root, 2107 struct btrfs_path *path, 2108 struct btrfs_key *new_key); 2109 int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root 2110 *root, struct btrfs_key *key, struct btrfs_path *p, int 2111 ins_len, int cow); 2112 int btrfs_realloc_node(struct btrfs_trans_handle *trans, 2113 struct btrfs_root *root, struct extent_buffer *parent, 2114 int start_slot, int cache_only, u64 *last_ret, 2115 struct btrfs_key *progress); 2116 void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); 2117 struct btrfs_path *btrfs_alloc_path(void); 2118 void btrfs_free_path(struct btrfs_path *p); 2119 void btrfs_set_path_blocking(struct btrfs_path *p); 2120 void btrfs_unlock_up_safe(struct btrfs_path *p, int level); 2121 2122 int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2123 struct btrfs_path *path, int slot, int nr); 2124 static inline int btrfs_del_item(struct btrfs_trans_handle *trans, 2125 struct btrfs_root *root, 2126 struct btrfs_path *path) 2127 { 2128 return btrfs_del_items(trans, root, path, path->slots[0], 1); 2129 } 2130 2131 int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root 2132 *root, struct btrfs_key *key, void *data, u32 data_size); 2133 int btrfs_insert_some_items(struct btrfs_trans_handle *trans, 2134 struct btrfs_root *root, 2135 struct btrfs_path *path, 2136 struct btrfs_key *cpu_key, u32 *data_size, 2137 int nr); 2138 int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, 2139 struct btrfs_root *root, 2140 struct btrfs_path *path, 2141 struct btrfs_key *cpu_key, u32 *data_size, int nr); 2142 2143 static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, 2144 struct btrfs_root *root, 2145 struct btrfs_path *path, 2146 struct btrfs_key *key, 2147 u32 data_size) 2148 { 2149 return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); 2150 } 2151 2152 int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); 2153 int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); 2154 int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); 2155 int btrfs_drop_snapshot(struct btrfs_root *root, int update_ref); 2156 int btrfs_drop_subtree(struct btrfs_trans_handle *trans, 2157 struct btrfs_root *root, 2158 struct extent_buffer *node, 2159 struct extent_buffer *parent); 2160 /* root-item.c */ 2161 int btrfs_find_root_ref(struct btrfs_root *tree_root, 2162 struct btrfs_path *path, 2163 u64 root_id, u64 ref_id); 2164 int btrfs_add_root_ref(struct btrfs_trans_handle *trans, 2165 struct btrfs_root *tree_root, 2166 u64 root_id, u64 ref_id, u64 dirid, u64 sequence, 2167 const char *name, int name_len); 2168 int btrfs_del_root_ref(struct btrfs_trans_handle *trans, 2169 struct btrfs_root *tree_root, 2170 u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, 2171 const char *name, int name_len); 2172 int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, 2173 struct btrfs_key *key); 2174 int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root 2175 *root, struct btrfs_key *key, struct btrfs_root_item 2176 *item); 2177 int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root 2178 *root, struct btrfs_key *key, struct btrfs_root_item 2179 *item); 2180 int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct 2181 btrfs_root_item *item, struct btrfs_key *key); 2182 int btrfs_search_root(struct btrfs_root *root, u64 search_start, 2183 u64 *found_objectid); 2184 int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); 2185 int btrfs_find_orphan_roots(struct btrfs_root *tree_root); 2186 int btrfs_set_root_node(struct btrfs_root_item *item, 2187 struct extent_buffer *node); 2188 /* dir-item.c */ 2189 int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, 2190 struct btrfs_root *root, const char *name, 2191 int name_len, u64 dir, 2192 struct btrfs_key *location, u8 type, u64 index); 2193 struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, 2194 struct btrfs_root *root, 2195 struct btrfs_path *path, u64 dir, 2196 const char *name, int name_len, 2197 int mod); 2198 struct btrfs_dir_item * 2199 btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, 2200 struct btrfs_root *root, 2201 struct btrfs_path *path, u64 dir, 2202 u64 objectid, const char *name, int name_len, 2203 int mod); 2204 struct btrfs_dir_item * 2205 btrfs_search_dir_index_item(struct btrfs_root *root, 2206 struct btrfs_path *path, u64 dirid, 2207 const char *name, int name_len); 2208 struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, 2209 struct btrfs_path *path, 2210 const char *name, int name_len); 2211 int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, 2212 struct btrfs_root *root, 2213 struct btrfs_path *path, 2214 struct btrfs_dir_item *di); 2215 int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, 2216 struct btrfs_root *root, 2217 struct btrfs_path *path, u64 objectid, 2218 const char *name, u16 name_len, 2219 const void *data, u16 data_len); 2220 struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, 2221 struct btrfs_root *root, 2222 struct btrfs_path *path, u64 dir, 2223 const char *name, u16 name_len, 2224 int mod); 2225 2226 /* orphan.c */ 2227 int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, 2228 struct btrfs_root *root, u64 offset); 2229 int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, 2230 struct btrfs_root *root, u64 offset); 2231 int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); 2232 2233 /* inode-map.c */ 2234 int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, 2235 struct btrfs_root *fs_root, 2236 u64 dirid, u64 *objectid); 2237 int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); 2238 2239 /* inode-item.c */ 2240 int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, 2241 struct btrfs_root *root, 2242 const char *name, int name_len, 2243 u64 inode_objectid, u64 ref_objectid, u64 index); 2244 int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, 2245 struct btrfs_root *root, 2246 const char *name, int name_len, 2247 u64 inode_objectid, u64 ref_objectid, u64 *index); 2248 int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, 2249 struct btrfs_root *root, 2250 struct btrfs_path *path, u64 objectid); 2251 int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root 2252 *root, struct btrfs_path *path, 2253 struct btrfs_key *location, int mod); 2254 2255 /* file-item.c */ 2256 int btrfs_del_csums(struct btrfs_trans_handle *trans, 2257 struct btrfs_root *root, u64 bytenr, u64 len); 2258 int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, 2259 struct bio *bio, u32 *dst); 2260 int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, 2261 struct btrfs_root *root, 2262 u64 objectid, u64 pos, 2263 u64 disk_offset, u64 disk_num_bytes, 2264 u64 num_bytes, u64 offset, u64 ram_bytes, 2265 u8 compression, u8 encryption, u16 other_encoding); 2266 int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, 2267 struct btrfs_root *root, 2268 struct btrfs_path *path, u64 objectid, 2269 u64 bytenr, int mod); 2270 int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, 2271 struct btrfs_root *root, 2272 struct btrfs_ordered_sum *sums); 2273 int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, 2274 struct bio *bio, u64 file_start, int contig); 2275 int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, 2276 u64 start, unsigned long len); 2277 struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, 2278 struct btrfs_root *root, 2279 struct btrfs_path *path, 2280 u64 bytenr, int cow); 2281 int btrfs_csum_truncate(struct btrfs_trans_handle *trans, 2282 struct btrfs_root *root, struct btrfs_path *path, 2283 u64 isize); 2284 int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, 2285 u64 end, struct list_head *list); 2286 /* inode.c */ 2287 2288 /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ 2289 #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) 2290 #define ClearPageChecked ClearPageFsMisc 2291 #define SetPageChecked SetPageFsMisc 2292 #define PageChecked PageFsMisc 2293 #endif 2294 2295 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); 2296 int btrfs_set_inode_index(struct inode *dir, u64 *index); 2297 int btrfs_unlink_inode(struct btrfs_trans_handle *trans, 2298 struct btrfs_root *root, 2299 struct inode *dir, struct inode *inode, 2300 const char *name, int name_len); 2301 int btrfs_add_link(struct btrfs_trans_handle *trans, 2302 struct inode *parent_inode, struct inode *inode, 2303 const char *name, int name_len, int add_backref, u64 index); 2304 int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, 2305 struct btrfs_root *root, 2306 struct inode *dir, u64 objectid, 2307 const char *name, int name_len); 2308 int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, 2309 struct btrfs_root *root, 2310 struct inode *inode, u64 new_size, 2311 u32 min_type); 2312 2313 int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); 2314 int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, 2315 struct extent_state **cached_state); 2316 int btrfs_writepages(struct address_space *mapping, 2317 struct writeback_control *wbc); 2318 int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, 2319 struct btrfs_root *new_root, 2320 u64 new_dirid, u64 alloc_hint); 2321 int btrfs_merge_bio_hook(struct page *page, unsigned long offset, 2322 size_t size, struct bio *bio, unsigned long bio_flags); 2323 2324 unsigned long btrfs_force_ra(struct address_space *mapping, 2325 struct file_ra_state *ra, struct file *file, 2326 pgoff_t offset, pgoff_t last_index); 2327 int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); 2328 int btrfs_readpage(struct file *file, struct page *page); 2329 void btrfs_delete_inode(struct inode *inode); 2330 void btrfs_put_inode(struct inode *inode); 2331 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); 2332 void btrfs_dirty_inode(struct inode *inode); 2333 struct inode *btrfs_alloc_inode(struct super_block *sb); 2334 void btrfs_destroy_inode(struct inode *inode); 2335 void btrfs_drop_inode(struct inode *inode); 2336 int btrfs_init_cachep(void); 2337 void btrfs_destroy_cachep(void); 2338 long btrfs_ioctl_trans_end(struct file *file); 2339 struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, 2340 struct btrfs_root *root, int *was_new); 2341 int btrfs_commit_write(struct file *file, struct page *page, 2342 unsigned from, unsigned to); 2343 struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, 2344 size_t page_offset, u64 start, u64 end, 2345 int create); 2346 int btrfs_update_inode(struct btrfs_trans_handle *trans, 2347 struct btrfs_root *root, 2348 struct inode *inode); 2349 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); 2350 int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); 2351 void btrfs_orphan_cleanup(struct btrfs_root *root); 2352 int btrfs_cont_expand(struct inode *inode, loff_t size); 2353 int btrfs_invalidate_inodes(struct btrfs_root *root); 2354 void btrfs_add_delayed_iput(struct inode *inode); 2355 void btrfs_run_delayed_iputs(struct btrfs_root *root); 2356 extern const struct dentry_operations btrfs_dentry_operations; 2357 2358 /* ioctl.c */ 2359 long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); 2360 void btrfs_update_iflags(struct inode *inode); 2361 void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); 2362 2363 /* file.c */ 2364 int btrfs_sync_file(struct file *file, struct dentry *dentry, int datasync); 2365 int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, 2366 int skip_pinned); 2367 int btrfs_check_file(struct btrfs_root *root, struct inode *inode); 2368 extern const struct file_operations btrfs_file_operations; 2369 int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, 2370 u64 start, u64 end, u64 *hint_byte, int drop_cache); 2371 int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, 2372 struct inode *inode, u64 start, u64 end); 2373 int btrfs_release_file(struct inode *inode, struct file *file); 2374 2375 /* tree-defrag.c */ 2376 int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, 2377 struct btrfs_root *root, int cache_only); 2378 2379 /* sysfs.c */ 2380 int btrfs_init_sysfs(void); 2381 void btrfs_exit_sysfs(void); 2382 int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); 2383 int btrfs_sysfs_add_root(struct btrfs_root *root); 2384 void btrfs_sysfs_del_root(struct btrfs_root *root); 2385 void btrfs_sysfs_del_super(struct btrfs_fs_info *root); 2386 2387 /* xattr.c */ 2388 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 2389 2390 /* super.c */ 2391 int btrfs_parse_options(struct btrfs_root *root, char *options); 2392 int btrfs_sync_fs(struct super_block *sb, int wait); 2393 2394 /* acl.c */ 2395 #ifdef CONFIG_BTRFS_FS_POSIX_ACL 2396 int btrfs_check_acl(struct inode *inode, int mask); 2397 #else 2398 #define btrfs_check_acl NULL 2399 #endif 2400 int btrfs_init_acl(struct btrfs_trans_handle *trans, 2401 struct inode *inode, struct inode *dir); 2402 int btrfs_acl_chmod(struct inode *inode); 2403 2404 /* relocation.c */ 2405 int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); 2406 int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, 2407 struct btrfs_root *root); 2408 int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, 2409 struct btrfs_root *root); 2410 int btrfs_recover_relocation(struct btrfs_root *root); 2411 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); 2412 #endif 2413