| 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/workqueue.h> |
| 27 | #include <linux/completion.h> |
| 28 | #include <asm/kmap_types.h> |
| 29 | #include "bit-radix.h" |
| 30 | #include "extent_io.h" |
| 31 | #include "extent_map.h" |
| 32 | |
| 33 | struct btrfs_trans_handle; |
| 34 | struct btrfs_transaction; |
| 35 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 36 | extern struct kmem_cache *btrfs_transaction_cachep; |
| 37 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
| 38 | extern struct kmem_cache *btrfs_path_cachep; |
| 39 | |
| 40 | #define BTRFS_MAGIC "_B4RfS_M" |
| 41 | |
| 42 | #define BTRFS_MAX_LEVEL 8 |
| 43 | |
| 44 | /* holds pointers to all of the tree roots */ |
| 45 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
| 46 | |
| 47 | /* stores information about which extents are in use, and reference counts */ |
| 48 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
| 49 | |
| 50 | /* one per subvolume, storing files and directories */ |
| 51 | #define BTRFS_FS_TREE_OBJECTID 3ULL |
| 52 | |
| 53 | /* directory objectid inside the root tree */ |
| 54 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL |
| 55 | |
| 56 | |
| 57 | /* |
| 58 | * chunk tree stores translations from logical -> physical block numbering |
| 59 | * the super block points to the chunk tree |
| 60 | */ |
| 61 | #define BTRFS_CHUNK_TREE_OBJECTID 5ULL |
| 62 | |
| 63 | /* |
| 64 | * stores information about which areas of a given device are in use. |
| 65 | * one per device. The tree of tree roots points to the device tree |
| 66 | */ |
| 67 | #define BTRFS_DEV_TREE_OBJECTID 6ULL |
| 68 | |
| 69 | /* |
| 70 | * All files have objectids higher than this. |
| 71 | */ |
| 72 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
| 73 | |
| 74 | |
| 75 | /* |
| 76 | * the device items go into the chunk tree. The key is in the form |
| 77 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| 78 | */ |
| 79 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| 80 | |
| 81 | /* |
| 82 | * we can actually store much bigger names, but lets not confuse the rest |
| 83 | * of linux |
| 84 | */ |
| 85 | #define BTRFS_NAME_LEN 255 |
| 86 | |
| 87 | /* 32 bytes in various csum fields */ |
| 88 | #define BTRFS_CSUM_SIZE 32 |
| 89 | /* four bytes for CRC32 */ |
| 90 | #define BTRFS_CRC32_SIZE 4 |
| 91 | #define BTRFS_EMPTY_DIR_SIZE 0 |
| 92 | |
| 93 | #define BTRFS_FT_UNKNOWN 0 |
| 94 | #define BTRFS_FT_REG_FILE 1 |
| 95 | #define BTRFS_FT_DIR 2 |
| 96 | #define BTRFS_FT_CHRDEV 3 |
| 97 | #define BTRFS_FT_BLKDEV 4 |
| 98 | #define BTRFS_FT_FIFO 5 |
| 99 | #define BTRFS_FT_SOCK 6 |
| 100 | #define BTRFS_FT_SYMLINK 7 |
| 101 | #define BTRFS_FT_XATTR 8 |
| 102 | #define BTRFS_FT_MAX 9 |
| 103 | |
| 104 | /* |
| 105 | * the key defines the order in the tree, and so it also defines (optimal) |
| 106 | * block layout. objectid corresonds to the inode number. The flags |
| 107 | * tells us things about the object, and is a kind of stream selector. |
| 108 | * so for a given inode, keys with flags of 1 might refer to the inode |
| 109 | * data, flags of 2 may point to file data in the btree and flags == 3 |
| 110 | * may point to extents. |
| 111 | * |
| 112 | * offset is the starting byte offset for this key in the stream. |
| 113 | * |
| 114 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 115 | * in cpu native order. Otherwise they are identical and their sizes |
| 116 | * should be the same (ie both packed) |
| 117 | */ |
| 118 | struct btrfs_disk_key { |
| 119 | __le64 objectid; |
| 120 | u8 type; |
| 121 | __le64 offset; |
| 122 | } __attribute__ ((__packed__)); |
| 123 | |
| 124 | struct btrfs_key { |
| 125 | u64 objectid; |
| 126 | u8 type; |
| 127 | u64 offset; |
| 128 | } __attribute__ ((__packed__)); |
| 129 | |
| 130 | struct btrfs_mapping_tree { |
| 131 | struct extent_map_tree map_tree; |
| 132 | }; |
| 133 | |
| 134 | #define BTRFS_DEV_UUID_SIZE 16 |
| 135 | struct btrfs_dev_item { |
| 136 | /* the internal btrfs device id */ |
| 137 | __le64 devid; |
| 138 | |
| 139 | /* size of the device */ |
| 140 | __le64 total_bytes; |
| 141 | |
| 142 | /* bytes used */ |
| 143 | __le64 bytes_used; |
| 144 | |
| 145 | /* optimal io alignment for this device */ |
| 146 | __le32 io_align; |
| 147 | |
| 148 | /* optimal io width for this device */ |
| 149 | __le32 io_width; |
| 150 | |
| 151 | /* minimal io size for this device */ |
| 152 | __le32 sector_size; |
| 153 | |
| 154 | /* the kernel device number */ |
| 155 | __le64 rdev; |
| 156 | |
| 157 | /* type and info about this device */ |
| 158 | __le64 type; |
| 159 | |
| 160 | /* partition number, 0 for whole dev */ |
| 161 | __le32 partition; |
| 162 | |
| 163 | /* length of the name data at the end of the item */ |
| 164 | __le16 name_len; |
| 165 | |
| 166 | /* physical drive uuid (or lvm uuid) */ |
| 167 | u8 uuid[BTRFS_DEV_UUID_SIZE]; |
| 168 | /* name goes here */ |
| 169 | } __attribute__ ((__packed__)); |
| 170 | |
| 171 | struct btrfs_stripe { |
| 172 | __le64 devid; |
| 173 | __le64 offset; |
| 174 | } __attribute__ ((__packed__)); |
| 175 | |
| 176 | struct btrfs_chunk { |
| 177 | __le64 owner; |
| 178 | __le64 stripe_len; |
| 179 | __le64 type; |
| 180 | |
| 181 | /* optimal io alignment for this chunk */ |
| 182 | __le32 io_align; |
| 183 | |
| 184 | /* optimal io width for this chunk */ |
| 185 | __le32 io_width; |
| 186 | |
| 187 | /* minimal io size for this chunk */ |
| 188 | __le32 sector_size; |
| 189 | |
| 190 | /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| 191 | * item in the btree |
| 192 | */ |
| 193 | __le16 num_stripes; |
| 194 | struct btrfs_stripe stripe; |
| 195 | /* additional stripes go here */ |
| 196 | } __attribute__ ((__packed__)); |
| 197 | |
| 198 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| 199 | { |
| 200 | BUG_ON(num_stripes == 0); |
| 201 | return sizeof(struct btrfs_chunk) + |
| 202 | sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| 203 | } |
| 204 | |
| 205 | #define BTRFS_FSID_SIZE 16 |
| 206 | /* |
| 207 | * every tree block (leaf or node) starts with this header. |
| 208 | */ |
| 209 | struct btrfs_header { |
| 210 | u8 csum[BTRFS_CSUM_SIZE]; |
| 211 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 212 | __le64 bytenr; /* which block this node is supposed to live in */ |
| 213 | __le64 generation; |
| 214 | __le64 owner; |
| 215 | __le32 nritems; |
| 216 | __le16 flags; |
| 217 | u8 level; |
| 218 | } __attribute__ ((__packed__)); |
| 219 | |
| 220 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
| 221 | sizeof(struct btrfs_header)) / \ |
| 222 | sizeof(struct btrfs_key_ptr)) |
| 223 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| 224 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
| 225 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 226 | sizeof(struct btrfs_item) - \ |
| 227 | sizeof(struct btrfs_file_extent_item)) |
| 228 | |
| 229 | |
| 230 | /* |
| 231 | * this is a very generous portion of the super block, giving us |
| 232 | * room to translate 14 chunks with 3 stripes each. |
| 233 | */ |
| 234 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
| 235 | |
| 236 | /* |
| 237 | * the super block basically lists the main trees of the FS |
| 238 | * it currently lacks any block count etc etc |
| 239 | */ |
| 240 | struct btrfs_super_block { |
| 241 | u8 csum[BTRFS_CSUM_SIZE]; |
| 242 | /* the first 3 fields must match struct btrfs_header */ |
| 243 | u8 fsid[16]; /* FS specific uuid */ |
| 244 | __le64 bytenr; /* this block number */ |
| 245 | __le64 magic; |
| 246 | __le64 generation; |
| 247 | __le64 root; |
| 248 | __le64 chunk_root; |
| 249 | __le64 total_bytes; |
| 250 | __le64 bytes_used; |
| 251 | __le64 root_dir_objectid; |
| 252 | __le32 sectorsize; |
| 253 | __le32 nodesize; |
| 254 | __le32 leafsize; |
| 255 | __le32 stripesize; |
| 256 | __le32 sys_chunk_array_size; |
| 257 | u8 root_level; |
| 258 | u8 chunk_root_level; |
| 259 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
| 260 | } __attribute__ ((__packed__)); |
| 261 | |
| 262 | /* |
| 263 | * A leaf is full of items. offset and size tell us where to find |
| 264 | * the item in the leaf (relative to the start of the data area) |
| 265 | */ |
| 266 | struct btrfs_item { |
| 267 | struct btrfs_disk_key key; |
| 268 | __le32 offset; |
| 269 | __le32 size; |
| 270 | } __attribute__ ((__packed__)); |
| 271 | |
| 272 | /* |
| 273 | * leaves have an item area and a data area: |
| 274 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 275 | * |
| 276 | * The data is separate from the items to get the keys closer together |
| 277 | * during searches. |
| 278 | */ |
| 279 | struct btrfs_leaf { |
| 280 | struct btrfs_header header; |
| 281 | struct btrfs_item items[]; |
| 282 | } __attribute__ ((__packed__)); |
| 283 | |
| 284 | /* |
| 285 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 286 | * other blocks |
| 287 | */ |
| 288 | struct btrfs_key_ptr { |
| 289 | struct btrfs_disk_key key; |
| 290 | __le64 blockptr; |
| 291 | __le64 generation; |
| 292 | } __attribute__ ((__packed__)); |
| 293 | |
| 294 | struct btrfs_node { |
| 295 | struct btrfs_header header; |
| 296 | struct btrfs_key_ptr ptrs[]; |
| 297 | } __attribute__ ((__packed__)); |
| 298 | |
| 299 | /* |
| 300 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 301 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point |
| 302 | * to any other levels that are present. |
| 303 | * |
| 304 | * The slots array records the index of the item or block pointer |
| 305 | * used while walking the tree. |
| 306 | */ |
| 307 | struct btrfs_path { |
| 308 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
| 309 | int slots[BTRFS_MAX_LEVEL]; |
| 310 | int reada; |
| 311 | int lowest_level; |
| 312 | }; |
| 313 | |
| 314 | /* |
| 315 | * items in the extent btree are used to record the objectid of the |
| 316 | * owner of the block and the number of references |
| 317 | */ |
| 318 | struct btrfs_extent_item { |
| 319 | __le32 refs; |
| 320 | } __attribute__ ((__packed__)); |
| 321 | |
| 322 | struct btrfs_extent_ref { |
| 323 | __le64 root; |
| 324 | __le64 generation; |
| 325 | __le64 objectid; |
| 326 | __le64 offset; |
| 327 | } __attribute__ ((__packed__)); |
| 328 | |
| 329 | /* dev extents record free space on individual devices. The owner |
| 330 | * field points back to the chunk allocation mapping tree that allocated |
| 331 | * the extent |
| 332 | */ |
| 333 | struct btrfs_dev_extent { |
| 334 | __le64 owner; |
| 335 | __le64 length; |
| 336 | } __attribute__ ((__packed__)); |
| 337 | |
| 338 | |
| 339 | struct btrfs_inode_ref { |
| 340 | __le16 name_len; |
| 341 | /* name goes here */ |
| 342 | } __attribute__ ((__packed__)); |
| 343 | |
| 344 | struct btrfs_timespec { |
| 345 | __le64 sec; |
| 346 | __le32 nsec; |
| 347 | } __attribute__ ((__packed__)); |
| 348 | |
| 349 | /* |
| 350 | * there is no padding here on purpose. If you want to extent the inode, |
| 351 | * make a new item type |
| 352 | */ |
| 353 | struct btrfs_inode_item { |
| 354 | __le64 generation; |
| 355 | __le64 size; |
| 356 | __le64 nblocks; |
| 357 | __le64 block_group; |
| 358 | __le32 nlink; |
| 359 | __le32 uid; |
| 360 | __le32 gid; |
| 361 | __le32 mode; |
| 362 | __le64 rdev; |
| 363 | __le16 flags; |
| 364 | __le16 compat_flags; |
| 365 | struct btrfs_timespec atime; |
| 366 | struct btrfs_timespec ctime; |
| 367 | struct btrfs_timespec mtime; |
| 368 | struct btrfs_timespec otime; |
| 369 | } __attribute__ ((__packed__)); |
| 370 | |
| 371 | struct btrfs_dir_item { |
| 372 | struct btrfs_disk_key location; |
| 373 | __le16 data_len; |
| 374 | __le16 name_len; |
| 375 | u8 type; |
| 376 | } __attribute__ ((__packed__)); |
| 377 | |
| 378 | struct btrfs_root_item { |
| 379 | struct btrfs_inode_item inode; |
| 380 | __le64 root_dirid; |
| 381 | __le64 bytenr; |
| 382 | __le64 byte_limit; |
| 383 | __le64 bytes_used; |
| 384 | __le32 flags; |
| 385 | __le32 refs; |
| 386 | struct btrfs_disk_key drop_progress; |
| 387 | u8 drop_level; |
| 388 | u8 level; |
| 389 | } __attribute__ ((__packed__)); |
| 390 | |
| 391 | #define BTRFS_FILE_EXTENT_REG 0 |
| 392 | #define BTRFS_FILE_EXTENT_INLINE 1 |
| 393 | |
| 394 | struct btrfs_file_extent_item { |
| 395 | __le64 generation; |
| 396 | u8 type; |
| 397 | /* |
| 398 | * disk space consumed by the extent, checksum blocks are included |
| 399 | * in these numbers |
| 400 | */ |
| 401 | __le64 disk_bytenr; |
| 402 | __le64 disk_num_bytes; |
| 403 | /* |
| 404 | * the logical offset in file blocks (no csums) |
| 405 | * this extent record is for. This allows a file extent to point |
| 406 | * into the middle of an existing extent on disk, sharing it |
| 407 | * between two snapshots (useful if some bytes in the middle of the |
| 408 | * extent have changed |
| 409 | */ |
| 410 | __le64 offset; |
| 411 | /* |
| 412 | * the logical number of file blocks (no csums included) |
| 413 | */ |
| 414 | __le64 num_bytes; |
| 415 | } __attribute__ ((__packed__)); |
| 416 | |
| 417 | struct btrfs_csum_item { |
| 418 | u8 csum; |
| 419 | } __attribute__ ((__packed__)); |
| 420 | |
| 421 | /* different types of block groups (and chunks) */ |
| 422 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) |
| 423 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) |
| 424 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) |
| 425 | |
| 426 | |
| 427 | struct btrfs_block_group_item { |
| 428 | __le64 used; |
| 429 | __le64 chunk_tree; |
| 430 | __le64 chunk_objectid; |
| 431 | __le64 flags; |
| 432 | } __attribute__ ((__packed__)); |
| 433 | |
| 434 | struct btrfs_block_group_cache { |
| 435 | struct btrfs_key key; |
| 436 | struct btrfs_block_group_item item; |
| 437 | u64 pinned; |
| 438 | u64 flags; |
| 439 | int cached; |
| 440 | }; |
| 441 | |
| 442 | struct btrfs_device; |
| 443 | struct btrfs_fs_info { |
| 444 | u8 fsid[BTRFS_FSID_SIZE]; |
| 445 | struct btrfs_root *extent_root; |
| 446 | struct btrfs_root *tree_root; |
| 447 | struct btrfs_root *chunk_root; |
| 448 | struct btrfs_root *dev_root; |
| 449 | struct radix_tree_root fs_roots_radix; |
| 450 | |
| 451 | struct extent_io_tree free_space_cache; |
| 452 | struct extent_io_tree block_group_cache; |
| 453 | struct extent_io_tree pinned_extents; |
| 454 | struct extent_io_tree pending_del; |
| 455 | struct extent_io_tree extent_ins; |
| 456 | |
| 457 | /* logical->physical extent mapping */ |
| 458 | struct btrfs_mapping_tree mapping_tree; |
| 459 | |
| 460 | u64 generation; |
| 461 | u64 last_trans_committed; |
| 462 | unsigned long mount_opt; |
| 463 | u64 max_extent; |
| 464 | u64 max_inline; |
| 465 | u64 alloc_start; |
| 466 | struct btrfs_transaction *running_transaction; |
| 467 | struct btrfs_super_block super_copy; |
| 468 | struct extent_buffer *sb_buffer; |
| 469 | struct block_device *__bdev; |
| 470 | struct super_block *sb; |
| 471 | struct inode *btree_inode; |
| 472 | spinlock_t hash_lock; |
| 473 | struct mutex trans_mutex; |
| 474 | struct mutex fs_mutex; |
| 475 | struct list_head trans_list; |
| 476 | struct list_head hashers; |
| 477 | struct list_head dead_roots; |
| 478 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
| 479 | struct work_struct trans_work; |
| 480 | #else |
| 481 | struct delayed_work trans_work; |
| 482 | #endif |
| 483 | struct kobject super_kobj; |
| 484 | struct completion kobj_unregister; |
| 485 | int do_barriers; |
| 486 | int closing; |
| 487 | unsigned long throttles; |
| 488 | |
| 489 | u64 total_pinned; |
| 490 | struct list_head dirty_cowonly_roots; |
| 491 | |
| 492 | struct list_head devices; |
| 493 | struct list_head *last_device; |
| 494 | spinlock_t delalloc_lock; |
| 495 | spinlock_t new_trans_lock; |
| 496 | u64 delalloc_bytes; |
| 497 | u64 last_alloc; |
| 498 | u64 last_data_alloc; |
| 499 | }; |
| 500 | |
| 501 | /* |
| 502 | * in ram representation of the tree. extent_root is used for all allocations |
| 503 | * and for the extent tree extent_root root. |
| 504 | */ |
| 505 | struct btrfs_root { |
| 506 | struct extent_buffer *node; |
| 507 | struct extent_buffer *commit_root; |
| 508 | struct btrfs_root_item root_item; |
| 509 | struct btrfs_key root_key; |
| 510 | struct btrfs_fs_info *fs_info; |
| 511 | struct inode *inode; |
| 512 | struct kobject root_kobj; |
| 513 | struct completion kobj_unregister; |
| 514 | u64 objectid; |
| 515 | u64 last_trans; |
| 516 | |
| 517 | /* data allocations are done in sectorsize units */ |
| 518 | u32 sectorsize; |
| 519 | |
| 520 | /* node allocations are done in nodesize units */ |
| 521 | u32 nodesize; |
| 522 | |
| 523 | /* leaf allocations are done in leafsize units */ |
| 524 | u32 leafsize; |
| 525 | |
| 526 | u32 stripesize; |
| 527 | |
| 528 | u32 type; |
| 529 | u64 highest_inode; |
| 530 | u64 last_inode_alloc; |
| 531 | int ref_cows; |
| 532 | int track_dirty; |
| 533 | struct btrfs_key defrag_progress; |
| 534 | int defrag_running; |
| 535 | int defrag_level; |
| 536 | char *name; |
| 537 | int in_sysfs; |
| 538 | |
| 539 | /* the dirty list is only used by non-reference counted roots */ |
| 540 | struct list_head dirty_list; |
| 541 | }; |
| 542 | |
| 543 | /* |
| 544 | |
| 545 | * inode items have the data typically returned from stat and store other |
| 546 | * info about object characteristics. There is one for every file and dir in |
| 547 | * the FS |
| 548 | */ |
| 549 | #define BTRFS_INODE_ITEM_KEY 1 |
| 550 | #define BTRFS_INODE_REF_KEY 2 |
| 551 | #define BTRFS_XATTR_ITEM_KEY 8 |
| 552 | /* reserve 2-15 close to the inode for later flexibility */ |
| 553 | |
| 554 | /* |
| 555 | * dir items are the name -> inode pointers in a directory. There is one |
| 556 | * for every name in a directory. |
| 557 | */ |
| 558 | #define BTRFS_DIR_ITEM_KEY 16 |
| 559 | #define BTRFS_DIR_INDEX_KEY 17 |
| 560 | /* |
| 561 | * extent data is for file data |
| 562 | */ |
| 563 | #define BTRFS_EXTENT_DATA_KEY 18 |
| 564 | /* |
| 565 | * csum items have the checksums for data in the extents |
| 566 | */ |
| 567 | #define BTRFS_CSUM_ITEM_KEY 19 |
| 568 | |
| 569 | /* reserve 20-31 for other file stuff */ |
| 570 | |
| 571 | /* |
| 572 | * root items point to tree roots. There are typically in the root |
| 573 | * tree used by the super block to find all the other trees |
| 574 | */ |
| 575 | #define BTRFS_ROOT_ITEM_KEY 32 |
| 576 | /* |
| 577 | * extent items are in the extent map tree. These record which blocks |
| 578 | * are used, and how many references there are to each block |
| 579 | */ |
| 580 | #define BTRFS_EXTENT_ITEM_KEY 33 |
| 581 | #define BTRFS_EXTENT_REF_KEY 34 |
| 582 | |
| 583 | /* |
| 584 | * block groups give us hints into the extent allocation trees. Which |
| 585 | * blocks are free etc etc |
| 586 | */ |
| 587 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 50 |
| 588 | |
| 589 | #define BTRFS_DEV_EXTENT_KEY 75 |
| 590 | #define BTRFS_DEV_ITEM_KEY 76 |
| 591 | #define BTRFS_CHUNK_ITEM_KEY 77 |
| 592 | |
| 593 | /* |
| 594 | * string items are for debugging. They just store a short string of |
| 595 | * data in the FS |
| 596 | */ |
| 597 | #define BTRFS_STRING_ITEM_KEY 253 |
| 598 | |
| 599 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| 600 | #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| 601 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
| 602 | #define BTRFS_MOUNT_SSD (1 << 3) |
| 603 | |
| 604 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| 605 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| 606 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| 607 | BTRFS_MOUNT_##opt) |
| 608 | /* |
| 609 | * Inode flags |
| 610 | */ |
| 611 | #define BTRFS_INODE_NODATASUM (1 << 0) |
| 612 | #define BTRFS_INODE_NODATACOW (1 << 1) |
| 613 | #define BTRFS_INODE_READONLY (1 << 2) |
| 614 | #define btrfs_clear_flag(inode, flag) (BTRFS_I(inode)->flags &= \ |
| 615 | ~BTRFS_INODE_##flag) |
| 616 | #define btrfs_set_flag(inode, flag) (BTRFS_I(inode)->flags |= \ |
| 617 | BTRFS_INODE_##flag) |
| 618 | #define btrfs_test_flag(inode, flag) (BTRFS_I(inode)->flags & \ |
| 619 | BTRFS_INODE_##flag) |
| 620 | /* some macros to generate set/get funcs for the struct fields. This |
| 621 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| 622 | * one for u8: |
| 623 | */ |
| 624 | #define le8_to_cpu(v) (v) |
| 625 | #define cpu_to_le8(v) (v) |
| 626 | #define __le8 u8 |
| 627 | |
| 628 | #define read_eb_member(eb, ptr, type, member, result) ( \ |
| 629 | read_extent_buffer(eb, (char *)(result), \ |
| 630 | ((unsigned long)(ptr)) + \ |
| 631 | offsetof(type, member), \ |
| 632 | sizeof(((type *)0)->member))) |
| 633 | |
| 634 | #define write_eb_member(eb, ptr, type, member, result) ( \ |
| 635 | write_extent_buffer(eb, (char *)(result), \ |
| 636 | ((unsigned long)(ptr)) + \ |
| 637 | offsetof(type, member), \ |
| 638 | sizeof(((type *)0)->member))) |
| 639 | |
| 640 | #ifndef BTRFS_SETGET_FUNCS |
| 641 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
| 642 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
| 643 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
| 644 | #endif |
| 645 | |
| 646 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| 647 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| 648 | { \ |
| 649 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| 650 | u##bits res = le##bits##_to_cpu(p->member); \ |
| 651 | kunmap_atomic(p, KM_USER0); \ |
| 652 | return res; \ |
| 653 | } \ |
| 654 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| 655 | u##bits val) \ |
| 656 | { \ |
| 657 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| 658 | p->member = cpu_to_le##bits(val); \ |
| 659 | kunmap_atomic(p, KM_USER0); \ |
| 660 | } |
| 661 | |
| 662 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| 663 | static inline u##bits btrfs_##name(type *s) \ |
| 664 | { \ |
| 665 | return le##bits##_to_cpu(s->member); \ |
| 666 | } \ |
| 667 | static inline void btrfs_set_##name(type *s, u##bits val) \ |
| 668 | { \ |
| 669 | s->member = cpu_to_le##bits(val); \ |
| 670 | } |
| 671 | |
| 672 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| 673 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); |
| 674 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| 675 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| 676 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); |
| 677 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| 678 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
| 679 | BTRFS_SETGET_FUNCS(device_rdev, struct btrfs_dev_item, rdev, 64); |
| 680 | BTRFS_SETGET_FUNCS(device_partition, struct btrfs_dev_item, partition, 32); |
| 681 | BTRFS_SETGET_FUNCS(device_name_len, struct btrfs_dev_item, name_len, 16); |
| 682 | |
| 683 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| 684 | { |
| 685 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| 686 | } |
| 687 | |
| 688 | static inline char *btrfs_device_name(struct btrfs_dev_item *d) |
| 689 | { |
| 690 | return (char *)(d + 1); |
| 691 | } |
| 692 | |
| 693 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| 694 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| 695 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| 696 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| 697 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| 698 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| 699 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
| 700 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| 701 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| 702 | |
| 703 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| 704 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| 705 | stripe_len, 64); |
| 706 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| 707 | io_align, 32); |
| 708 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| 709 | io_width, 32); |
| 710 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| 711 | sector_size, 32); |
| 712 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| 713 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| 714 | num_stripes, 16); |
| 715 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| 716 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| 717 | |
| 718 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| 719 | int nr) |
| 720 | { |
| 721 | unsigned long offset = (unsigned long)c; |
| 722 | offset += offsetof(struct btrfs_chunk, stripe); |
| 723 | offset += nr * sizeof(struct btrfs_stripe); |
| 724 | return (struct btrfs_stripe *)offset; |
| 725 | } |
| 726 | |
| 727 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| 728 | struct btrfs_chunk *c, int nr) |
| 729 | { |
| 730 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| 731 | } |
| 732 | |
| 733 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, |
| 734 | struct btrfs_chunk *c, int nr, |
| 735 | u64 val) |
| 736 | { |
| 737 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); |
| 738 | } |
| 739 | |
| 740 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| 741 | struct btrfs_chunk *c, int nr) |
| 742 | { |
| 743 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| 744 | } |
| 745 | |
| 746 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, |
| 747 | struct btrfs_chunk *c, int nr, |
| 748 | u64 val) |
| 749 | { |
| 750 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); |
| 751 | } |
| 752 | |
| 753 | /* struct btrfs_block_group_item */ |
| 754 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| 755 | used, 64); |
| 756 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| 757 | used, 64); |
| 758 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_tree, struct btrfs_block_group_item, |
| 759 | chunk_tree, 64); |
| 760 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_tree, struct btrfs_block_group_item, |
| 761 | chunk_tree, 64); |
| 762 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| 763 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 764 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objecitd, |
| 765 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 766 | BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| 767 | struct btrfs_block_group_item, flags, 64); |
| 768 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| 769 | struct btrfs_block_group_item, flags, 64); |
| 770 | |
| 771 | /* struct btrfs_inode_ref */ |
| 772 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| 773 | |
| 774 | /* struct btrfs_inode_item */ |
| 775 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
| 776 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
| 777 | BTRFS_SETGET_FUNCS(inode_nblocks, struct btrfs_inode_item, nblocks, 64); |
| 778 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| 779 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 780 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| 781 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| 782 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
| 783 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
| 784 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 16); |
| 785 | BTRFS_SETGET_FUNCS(inode_compat_flags, struct btrfs_inode_item, |
| 786 | compat_flags, 16); |
| 787 | |
| 788 | static inline struct btrfs_timespec * |
| 789 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
| 790 | { |
| 791 | unsigned long ptr = (unsigned long)inode_item; |
| 792 | ptr += offsetof(struct btrfs_inode_item, atime); |
| 793 | return (struct btrfs_timespec *)ptr; |
| 794 | } |
| 795 | |
| 796 | static inline struct btrfs_timespec * |
| 797 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
| 798 | { |
| 799 | unsigned long ptr = (unsigned long)inode_item; |
| 800 | ptr += offsetof(struct btrfs_inode_item, mtime); |
| 801 | return (struct btrfs_timespec *)ptr; |
| 802 | } |
| 803 | |
| 804 | static inline struct btrfs_timespec * |
| 805 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
| 806 | { |
| 807 | unsigned long ptr = (unsigned long)inode_item; |
| 808 | ptr += offsetof(struct btrfs_inode_item, ctime); |
| 809 | return (struct btrfs_timespec *)ptr; |
| 810 | } |
| 811 | |
| 812 | static inline struct btrfs_timespec * |
| 813 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
| 814 | { |
| 815 | unsigned long ptr = (unsigned long)inode_item; |
| 816 | ptr += offsetof(struct btrfs_inode_item, otime); |
| 817 | return (struct btrfs_timespec *)ptr; |
| 818 | } |
| 819 | |
| 820 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| 821 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
| 822 | |
| 823 | /* struct btrfs_extent_item */ |
| 824 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 32); |
| 825 | |
| 826 | /* struct btrfs_dev_extent */ |
| 827 | BTRFS_SETGET_FUNCS(dev_extent_owner, struct btrfs_dev_extent, owner, 64); |
| 828 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| 829 | |
| 830 | /* struct btrfs_extent_ref */ |
| 831 | BTRFS_SETGET_FUNCS(ref_root, struct btrfs_extent_ref, root, 64); |
| 832 | BTRFS_SETGET_FUNCS(ref_generation, struct btrfs_extent_ref, generation, 64); |
| 833 | BTRFS_SETGET_FUNCS(ref_objectid, struct btrfs_extent_ref, objectid, 64); |
| 834 | BTRFS_SETGET_FUNCS(ref_offset, struct btrfs_extent_ref, offset, 64); |
| 835 | |
| 836 | BTRFS_SETGET_STACK_FUNCS(stack_ref_root, struct btrfs_extent_ref, root, 64); |
| 837 | BTRFS_SETGET_STACK_FUNCS(stack_ref_generation, struct btrfs_extent_ref, |
| 838 | generation, 64); |
| 839 | BTRFS_SETGET_STACK_FUNCS(stack_ref_objectid, struct btrfs_extent_ref, |
| 840 | objectid, 64); |
| 841 | BTRFS_SETGET_STACK_FUNCS(stack_ref_offset, struct btrfs_extent_ref, offset, 64); |
| 842 | |
| 843 | BTRFS_SETGET_STACK_FUNCS(stack_extent_refs, struct btrfs_extent_item, |
| 844 | refs, 32); |
| 845 | |
| 846 | /* struct btrfs_node */ |
| 847 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
| 848 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
| 849 | |
| 850 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
| 851 | { |
| 852 | unsigned long ptr; |
| 853 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 854 | sizeof(struct btrfs_key_ptr) * nr; |
| 855 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
| 856 | } |
| 857 | |
| 858 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| 859 | int nr, u64 val) |
| 860 | { |
| 861 | unsigned long ptr; |
| 862 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 863 | sizeof(struct btrfs_key_ptr) * nr; |
| 864 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
| 865 | } |
| 866 | |
| 867 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| 868 | { |
| 869 | unsigned long ptr; |
| 870 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 871 | sizeof(struct btrfs_key_ptr) * nr; |
| 872 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| 873 | } |
| 874 | |
| 875 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| 876 | int nr, u64 val) |
| 877 | { |
| 878 | unsigned long ptr; |
| 879 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 880 | sizeof(struct btrfs_key_ptr) * nr; |
| 881 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| 882 | } |
| 883 | |
| 884 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
| 885 | { |
| 886 | return offsetof(struct btrfs_node, ptrs) + |
| 887 | sizeof(struct btrfs_key_ptr) * nr; |
| 888 | } |
| 889 | |
| 890 | void btrfs_node_key(struct extent_buffer *eb, |
| 891 | struct btrfs_disk_key *disk_key, int nr); |
| 892 | |
| 893 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| 894 | struct btrfs_disk_key *disk_key, int nr) |
| 895 | { |
| 896 | unsigned long ptr; |
| 897 | ptr = btrfs_node_key_ptr_offset(nr); |
| 898 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| 899 | struct btrfs_key_ptr, key, disk_key); |
| 900 | } |
| 901 | |
| 902 | /* struct btrfs_item */ |
| 903 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| 904 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| 905 | |
| 906 | static inline unsigned long btrfs_item_nr_offset(int nr) |
| 907 | { |
| 908 | return offsetof(struct btrfs_leaf, items) + |
| 909 | sizeof(struct btrfs_item) * nr; |
| 910 | } |
| 911 | |
| 912 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
| 913 | int nr) |
| 914 | { |
| 915 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
| 916 | } |
| 917 | |
| 918 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
| 919 | struct btrfs_item *item) |
| 920 | { |
| 921 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
| 922 | } |
| 923 | |
| 924 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
| 925 | { |
| 926 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
| 927 | } |
| 928 | |
| 929 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
| 930 | { |
| 931 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
| 932 | } |
| 933 | |
| 934 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
| 935 | { |
| 936 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
| 937 | } |
| 938 | |
| 939 | static inline void btrfs_item_key(struct extent_buffer *eb, |
| 940 | struct btrfs_disk_key *disk_key, int nr) |
| 941 | { |
| 942 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 943 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| 944 | } |
| 945 | |
| 946 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| 947 | struct btrfs_disk_key *disk_key, int nr) |
| 948 | { |
| 949 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 950 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| 951 | } |
| 952 | |
| 953 | /* struct btrfs_dir_item */ |
| 954 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
| 955 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| 956 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); |
| 957 | |
| 958 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| 959 | struct btrfs_dir_item *item, |
| 960 | struct btrfs_disk_key *key) |
| 961 | { |
| 962 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| 963 | } |
| 964 | |
| 965 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| 966 | struct btrfs_dir_item *item, |
| 967 | struct btrfs_disk_key *key) |
| 968 | { |
| 969 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| 970 | } |
| 971 | |
| 972 | /* struct btrfs_disk_key */ |
| 973 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| 974 | objectid, 64); |
| 975 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| 976 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); |
| 977 | |
| 978 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 979 | struct btrfs_disk_key *disk) |
| 980 | { |
| 981 | cpu->offset = le64_to_cpu(disk->offset); |
| 982 | cpu->type = disk->type; |
| 983 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 984 | } |
| 985 | |
| 986 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 987 | struct btrfs_key *cpu) |
| 988 | { |
| 989 | disk->offset = cpu_to_le64(cpu->offset); |
| 990 | disk->type = cpu->type; |
| 991 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 992 | } |
| 993 | |
| 994 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
| 995 | struct btrfs_key *key, int nr) |
| 996 | { |
| 997 | struct btrfs_disk_key disk_key; |
| 998 | btrfs_node_key(eb, &disk_key, nr); |
| 999 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1000 | } |
| 1001 | |
| 1002 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
| 1003 | struct btrfs_key *key, int nr) |
| 1004 | { |
| 1005 | struct btrfs_disk_key disk_key; |
| 1006 | btrfs_item_key(eb, &disk_key, nr); |
| 1007 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1008 | } |
| 1009 | |
| 1010 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
| 1011 | struct btrfs_dir_item *item, |
| 1012 | struct btrfs_key *key) |
| 1013 | { |
| 1014 | struct btrfs_disk_key disk_key; |
| 1015 | btrfs_dir_item_key(eb, item, &disk_key); |
| 1016 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1017 | } |
| 1018 | |
| 1019 | |
| 1020 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
| 1021 | { |
| 1022 | return key->type; |
| 1023 | } |
| 1024 | |
| 1025 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
| 1026 | { |
| 1027 | key->type = val; |
| 1028 | } |
| 1029 | |
| 1030 | /* struct btrfs_header */ |
| 1031 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
| 1032 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| 1033 | generation, 64); |
| 1034 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| 1035 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
| 1036 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 16); |
| 1037 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| 1038 | |
| 1039 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
| 1040 | { |
| 1041 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
| 1042 | return (u8 *)ptr; |
| 1043 | } |
| 1044 | |
| 1045 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
| 1046 | { |
| 1047 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
| 1048 | return (u8 *)ptr; |
| 1049 | } |
| 1050 | |
| 1051 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
| 1052 | { |
| 1053 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
| 1054 | return (u8 *)ptr; |
| 1055 | } |
| 1056 | |
| 1057 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
| 1058 | { |
| 1059 | return NULL; |
| 1060 | } |
| 1061 | |
| 1062 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
| 1063 | { |
| 1064 | return NULL; |
| 1065 | } |
| 1066 | |
| 1067 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
| 1068 | { |
| 1069 | return NULL; |
| 1070 | } |
| 1071 | |
| 1072 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
| 1073 | { |
| 1074 | return (btrfs_header_level(eb) == 0); |
| 1075 | } |
| 1076 | |
| 1077 | /* struct btrfs_root_item */ |
| 1078 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
| 1079 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1080 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
| 1081 | |
| 1082 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1083 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
| 1084 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| 1085 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
| 1086 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 32); |
| 1087 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| 1088 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); |
| 1089 | |
| 1090 | /* struct btrfs_super_block */ |
| 1091 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
| 1092 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| 1093 | generation, 64); |
| 1094 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
| 1095 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| 1096 | struct btrfs_super_block, sys_chunk_array_size, 32); |
| 1097 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| 1098 | root_level, 8); |
| 1099 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| 1100 | chunk_root, 64); |
| 1101 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
| 1102 | chunk_root_level, 64); |
| 1103 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| 1104 | total_bytes, 64); |
| 1105 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| 1106 | bytes_used, 64); |
| 1107 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| 1108 | sectorsize, 32); |
| 1109 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| 1110 | nodesize, 32); |
| 1111 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| 1112 | leafsize, 32); |
| 1113 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| 1114 | stripesize, 32); |
| 1115 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| 1116 | root_dir_objectid, 64); |
| 1117 | |
| 1118 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
| 1119 | { |
| 1120 | return offsetof(struct btrfs_leaf, items); |
| 1121 | } |
| 1122 | |
| 1123 | /* struct btrfs_file_extent_item */ |
| 1124 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); |
| 1125 | |
| 1126 | static inline unsigned long btrfs_file_extent_inline_start(struct |
| 1127 | btrfs_file_extent_item *e) |
| 1128 | { |
| 1129 | unsigned long offset = (unsigned long)e; |
| 1130 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| 1131 | return offset; |
| 1132 | } |
| 1133 | |
| 1134 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 1135 | { |
| 1136 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
| 1137 | } |
| 1138 | |
| 1139 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| 1140 | struct btrfs_item *e) |
| 1141 | { |
| 1142 | unsigned long offset; |
| 1143 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| 1144 | return btrfs_item_size(eb, e) - offset; |
| 1145 | } |
| 1146 | |
| 1147 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| 1148 | disk_bytenr, 64); |
| 1149 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| 1150 | generation, 64); |
| 1151 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| 1152 | disk_num_bytes, 64); |
| 1153 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| 1154 | offset, 64); |
| 1155 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| 1156 | num_bytes, 64); |
| 1157 | |
| 1158 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 1159 | { |
| 1160 | return sb->s_fs_info; |
| 1161 | } |
| 1162 | |
| 1163 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
| 1164 | const char *name, int len) |
| 1165 | { |
| 1166 | /* if we already have a name just free it */ |
| 1167 | if (root->name) |
| 1168 | kfree(root->name); |
| 1169 | |
| 1170 | root->name = kmalloc(len+1, GFP_KERNEL); |
| 1171 | if (!root->name) |
| 1172 | return -ENOMEM; |
| 1173 | |
| 1174 | memcpy(root->name, name, len); |
| 1175 | root->name[len] ='\0'; |
| 1176 | |
| 1177 | return 0; |
| 1178 | } |
| 1179 | |
| 1180 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) { |
| 1181 | if (level == 0) |
| 1182 | return root->leafsize; |
| 1183 | return root->nodesize; |
| 1184 | } |
| 1185 | |
| 1186 | /* helper function to cast into the data area of the leaf. */ |
| 1187 | #define btrfs_item_ptr(leaf, slot, type) \ |
| 1188 | ((type *)(btrfs_leaf_data(leaf) + \ |
| 1189 | btrfs_item_offset_nr(leaf, slot))) |
| 1190 | |
| 1191 | #define btrfs_item_ptr_offset(leaf, slot) \ |
| 1192 | ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| 1193 | btrfs_item_offset_nr(leaf, slot))) |
| 1194 | |
| 1195 | static inline struct dentry *fdentry(struct file *file) { |
| 1196 | #if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18) |
| 1197 | return file->f_dentry; |
| 1198 | #else |
| 1199 | return file->f_path.dentry; |
| 1200 | #endif |
| 1201 | } |
| 1202 | |
| 1203 | /* extent-tree.c */ |
| 1204 | u32 btrfs_count_snapshots_in_path(struct btrfs_root *root, |
| 1205 | struct btrfs_path *count_path, |
| 1206 | u64 first_extent); |
| 1207 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
| 1208 | struct btrfs_root *root); |
| 1209 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
| 1210 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
| 1211 | btrfs_fs_info *info, |
| 1212 | u64 bytenr); |
| 1213 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
| 1214 | struct btrfs_block_group_cache |
| 1215 | *hint, u64 search_start, |
| 1216 | int data, int owner); |
| 1217 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
| 1218 | struct btrfs_root *root, u64 owner_objectid); |
| 1219 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| 1220 | struct btrfs_root *root, u32 size, |
| 1221 | u64 root_objectid, |
| 1222 | u64 hint, u64 empty_size); |
| 1223 | struct extent_buffer *__btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| 1224 | struct btrfs_root *root, |
| 1225 | u32 blocksize, |
| 1226 | u64 root_objectid, |
| 1227 | u64 ref_generation, |
| 1228 | u64 first_objectid, |
| 1229 | int level, |
| 1230 | u64 hint, |
| 1231 | u64 empty_size); |
| 1232 | int btrfs_grow_extent_tree(struct btrfs_trans_handle *trans, |
| 1233 | struct btrfs_root *root, u64 new_size); |
| 1234 | int btrfs_shrink_extent_tree(struct btrfs_root *root, u64 new_size); |
| 1235 | int btrfs_insert_extent_backref(struct btrfs_trans_handle *trans, |
| 1236 | struct btrfs_root *root, |
| 1237 | struct btrfs_path *path, u64 bytenr, |
| 1238 | u64 root_objectid, u64 ref_generation, |
| 1239 | u64 owner, u64 owner_offset); |
| 1240 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
| 1241 | struct btrfs_root *root, |
| 1242 | u64 num_bytes, u64 root_objectid, u64 ref_generation, |
| 1243 | u64 owner, u64 owner_offset, |
| 1244 | u64 empty_size, u64 hint_byte, |
| 1245 | u64 search_end, struct btrfs_key *ins, int data); |
| 1246 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1247 | struct extent_buffer *buf); |
| 1248 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1249 | *root, u64 bytenr, u64 num_bytes, |
| 1250 | u64 root_objectid, u64 ref_generation, |
| 1251 | u64 owner_objectid, u64 owner_offset, int pin); |
| 1252 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
| 1253 | struct btrfs_root *root, |
| 1254 | struct extent_io_tree *unpin); |
| 1255 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 1256 | struct btrfs_root *root, |
| 1257 | u64 bytenr, u64 num_bytes, |
| 1258 | u64 root_objectid, u64 ref_generation, |
| 1259 | u64 owner, u64 owner_offset); |
| 1260 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 1261 | struct btrfs_root *root); |
| 1262 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 1263 | int btrfs_read_block_groups(struct btrfs_root *root); |
| 1264 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| 1265 | struct btrfs_root *root, u64 bytes_used, |
| 1266 | u64 type, u64 chunk_tree, u64 chunk_objectid, |
| 1267 | u64 size); |
| 1268 | /* ctree.c */ |
| 1269 | int btrfs_previous_item(struct btrfs_root *root, |
| 1270 | struct btrfs_path *path, u64 min_objectid, |
| 1271 | int type); |
| 1272 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| 1273 | struct btrfs_root *root, struct extent_buffer *buf, |
| 1274 | struct extent_buffer *parent, int parent_slot, |
| 1275 | struct extent_buffer **cow_ret); |
| 1276 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| 1277 | struct btrfs_root *root, |
| 1278 | struct extent_buffer *buf, |
| 1279 | struct extent_buffer **cow_ret, u64 new_root_objectid); |
| 1280 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1281 | *root, struct btrfs_path *path, u32 data_size); |
| 1282 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 1283 | struct btrfs_root *root, |
| 1284 | struct btrfs_path *path, |
| 1285 | u32 new_size, int from_end); |
| 1286 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1287 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 1288 | ins_len, int cow); |
| 1289 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
| 1290 | struct btrfs_root *root, struct extent_buffer *parent, |
| 1291 | int start_slot, int cache_only, u64 *last_ret, |
| 1292 | struct btrfs_key *progress); |
| 1293 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
| 1294 | struct btrfs_path *btrfs_alloc_path(void); |
| 1295 | void btrfs_free_path(struct btrfs_path *p); |
| 1296 | void btrfs_init_path(struct btrfs_path *p); |
| 1297 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1298 | struct btrfs_path *path, int slot, int nr); |
| 1299 | |
| 1300 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| 1301 | struct btrfs_root *root, |
| 1302 | struct btrfs_path *path) |
| 1303 | { |
| 1304 | return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| 1305 | } |
| 1306 | |
| 1307 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1308 | *root, struct btrfs_key *key, void *data, u32 data_size); |
| 1309 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| 1310 | struct btrfs_root *root, |
| 1311 | struct btrfs_path *path, |
| 1312 | struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| 1313 | |
| 1314 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| 1315 | struct btrfs_root *root, |
| 1316 | struct btrfs_path *path, |
| 1317 | struct btrfs_key *key, |
| 1318 | u32 data_size) |
| 1319 | { |
| 1320 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| 1321 | } |
| 1322 | |
| 1323 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 1324 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 1325 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
| 1326 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1327 | *root); |
| 1328 | /* root-item.c */ |
| 1329 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1330 | struct btrfs_key *key); |
| 1331 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1332 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1333 | *item); |
| 1334 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1335 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1336 | *item); |
| 1337 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 1338 | btrfs_root_item *item, struct btrfs_key *key); |
| 1339 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid, |
| 1340 | struct btrfs_root *latest_root); |
| 1341 | /* dir-item.c */ |
| 1342 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1343 | *root, const char *name, int name_len, u64 dir, |
| 1344 | struct btrfs_key *location, u8 type); |
| 1345 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 1346 | struct btrfs_root *root, |
| 1347 | struct btrfs_path *path, u64 dir, |
| 1348 | const char *name, int name_len, |
| 1349 | int mod); |
| 1350 | struct btrfs_dir_item * |
| 1351 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 1352 | struct btrfs_root *root, |
| 1353 | struct btrfs_path *path, u64 dir, |
| 1354 | u64 objectid, const char *name, int name_len, |
| 1355 | int mod); |
| 1356 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 1357 | struct btrfs_path *path, |
| 1358 | const char *name, int name_len); |
| 1359 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 1360 | struct btrfs_root *root, |
| 1361 | struct btrfs_path *path, |
| 1362 | struct btrfs_dir_item *di); |
| 1363 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
| 1364 | struct btrfs_root *root, const char *name, |
| 1365 | u16 name_len, const void *data, u16 data_len, |
| 1366 | u64 dir); |
| 1367 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| 1368 | struct btrfs_root *root, |
| 1369 | struct btrfs_path *path, u64 dir, |
| 1370 | const char *name, u16 name_len, |
| 1371 | int mod); |
| 1372 | /* inode-map.c */ |
| 1373 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 1374 | struct btrfs_root *fs_root, |
| 1375 | u64 dirid, u64 *objectid); |
| 1376 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 1377 | |
| 1378 | /* inode-item.c */ |
| 1379 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| 1380 | struct btrfs_root *root, |
| 1381 | const char *name, int name_len, |
| 1382 | u64 inode_objectid, u64 ref_objectid); |
| 1383 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| 1384 | struct btrfs_root *root, |
| 1385 | const char *name, int name_len, |
| 1386 | u64 inode_objectid, u64 ref_objectid); |
| 1387 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| 1388 | struct btrfs_root *root, |
| 1389 | struct btrfs_path *path, u64 objectid); |
| 1390 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1391 | *root, struct btrfs_path *path, |
| 1392 | struct btrfs_key *location, int mod); |
| 1393 | |
| 1394 | /* file-item.c */ |
| 1395 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
| 1396 | struct btrfs_root *root, |
| 1397 | u64 objectid, u64 pos, u64 offset, |
| 1398 | u64 disk_num_bytes, |
| 1399 | u64 num_bytes); |
| 1400 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 1401 | struct btrfs_root *root, |
| 1402 | struct btrfs_path *path, u64 objectid, |
| 1403 | u64 bytenr, int mod); |
| 1404 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
| 1405 | struct btrfs_root *root, struct inode *inode, |
| 1406 | struct bio *bio); |
| 1407 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 1408 | struct btrfs_root *root, |
| 1409 | struct btrfs_path *path, |
| 1410 | u64 objectid, u64 offset, |
| 1411 | int cow); |
| 1412 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 1413 | struct btrfs_root *root, struct btrfs_path *path, |
| 1414 | u64 isize); |
| 1415 | /* inode.c */ |
| 1416 | static inline void dec_i_blocks(struct inode *inode, u64 dec) |
| 1417 | { |
| 1418 | dec = dec >> 9; |
| 1419 | if (dec <= inode->i_blocks) |
| 1420 | inode->i_blocks -= dec; |
| 1421 | else |
| 1422 | inode->i_blocks = 0; |
| 1423 | } |
| 1424 | |
| 1425 | unsigned long btrfs_force_ra(struct address_space *mapping, |
| 1426 | struct file_ra_state *ra, struct file *file, |
| 1427 | pgoff_t offset, pgoff_t last_index); |
| 1428 | int btrfs_check_free_space(struct btrfs_root *root, u64 num_required, |
| 1429 | int for_del); |
| 1430 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
| 1431 | int btrfs_readpage(struct file *file, struct page *page); |
| 1432 | void btrfs_delete_inode(struct inode *inode); |
| 1433 | void btrfs_put_inode(struct inode *inode); |
| 1434 | void btrfs_read_locked_inode(struct inode *inode); |
| 1435 | int btrfs_write_inode(struct inode *inode, int wait); |
| 1436 | void btrfs_dirty_inode(struct inode *inode); |
| 1437 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 1438 | void btrfs_destroy_inode(struct inode *inode); |
| 1439 | int btrfs_init_cachep(void); |
| 1440 | void btrfs_destroy_cachep(void); |
| 1441 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| 1442 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
| 1443 | struct btrfs_root *root); |
| 1444 | struct inode *btrfs_ilookup(struct super_block *s, u64 objectid, |
| 1445 | u64 root_objectid); |
| 1446 | int btrfs_commit_write(struct file *file, struct page *page, |
| 1447 | unsigned from, unsigned to); |
| 1448 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
| 1449 | size_t page_offset, u64 start, u64 end, |
| 1450 | int create); |
| 1451 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 1452 | struct btrfs_root *root, |
| 1453 | struct inode *inode); |
| 1454 | /* file.c */ |
| 1455 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
| 1456 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
| 1457 | extern struct file_operations btrfs_file_operations; |
| 1458 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| 1459 | struct btrfs_root *root, struct inode *inode, |
| 1460 | u64 start, u64 end, u64 inline_limit, u64 *hint_block); |
| 1461 | /* tree-defrag.c */ |
| 1462 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 1463 | struct btrfs_root *root, int cache_only); |
| 1464 | |
| 1465 | /* sysfs.c */ |
| 1466 | int btrfs_init_sysfs(void); |
| 1467 | void btrfs_exit_sysfs(void); |
| 1468 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); |
| 1469 | int btrfs_sysfs_add_root(struct btrfs_root *root); |
| 1470 | void btrfs_sysfs_del_root(struct btrfs_root *root); |
| 1471 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); |
| 1472 | |
| 1473 | /* xattr.c */ |
| 1474 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
| 1475 | int btrfs_delete_xattrs(struct btrfs_trans_handle *trans, |
| 1476 | struct btrfs_root *root, struct inode *inode); |
| 1477 | /* super.c */ |
| 1478 | u64 btrfs_parse_size(char *str); |
| 1479 | #endif |