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