| 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__ |
| 20 | #define __BTRFS__ |
| 21 | |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/buffer_head.h> |
| 24 | #include <linux/workqueue.h> |
| 25 | #include <linux/completion.h> |
| 26 | #include "bit-radix.h" |
| 27 | |
| 28 | struct btrfs_trans_handle; |
| 29 | struct btrfs_transaction; |
| 30 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 31 | extern struct kmem_cache *btrfs_transaction_cachep; |
| 32 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
| 33 | extern struct kmem_cache *btrfs_path_cachep; |
| 34 | |
| 35 | #define BTRFS_MAGIC "_BtRfS_M" |
| 36 | |
| 37 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
| 38 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
| 39 | #define BTRFS_FS_TREE_OBJECTID 3ULL |
| 40 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 4ULL |
| 41 | #define BTRFS_FIRST_FREE_OBJECTID 5ULL |
| 42 | |
| 43 | /* |
| 44 | * we can actually store much bigger names, but lets not confuse the rest |
| 45 | * of linux |
| 46 | */ |
| 47 | #define BTRFS_NAME_LEN 255 |
| 48 | |
| 49 | /* 32 bytes in various csum fields */ |
| 50 | #define BTRFS_CSUM_SIZE 32 |
| 51 | /* four bytes for CRC32 */ |
| 52 | #define BTRFS_CRC32_SIZE 4 |
| 53 | #define BTRFS_EMPTY_DIR_SIZE 6 |
| 54 | |
| 55 | #define BTRFS_FT_UNKNOWN 0 |
| 56 | #define BTRFS_FT_REG_FILE 1 |
| 57 | #define BTRFS_FT_DIR 2 |
| 58 | #define BTRFS_FT_CHRDEV 3 |
| 59 | #define BTRFS_FT_BLKDEV 4 |
| 60 | #define BTRFS_FT_FIFO 5 |
| 61 | #define BTRFS_FT_SOCK 6 |
| 62 | #define BTRFS_FT_SYMLINK 7 |
| 63 | #define BTRFS_FT_MAX 8 |
| 64 | |
| 65 | /* |
| 66 | * the key defines the order in the tree, and so it also defines (optimal) |
| 67 | * block layout. objectid corresonds to the inode number. The flags |
| 68 | * tells us things about the object, and is a kind of stream selector. |
| 69 | * so for a given inode, keys with flags of 1 might refer to the inode |
| 70 | * data, flags of 2 may point to file data in the btree and flags == 3 |
| 71 | * may point to extents. |
| 72 | * |
| 73 | * offset is the starting byte offset for this key in the stream. |
| 74 | * |
| 75 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 76 | * in cpu native order. Otherwise they are identical and their sizes |
| 77 | * should be the same (ie both packed) |
| 78 | */ |
| 79 | struct btrfs_disk_key { |
| 80 | __le64 objectid; |
| 81 | __le32 flags; |
| 82 | __le64 offset; |
| 83 | } __attribute__ ((__packed__)); |
| 84 | |
| 85 | struct btrfs_key { |
| 86 | u64 objectid; |
| 87 | u32 flags; |
| 88 | u64 offset; |
| 89 | } __attribute__ ((__packed__)); |
| 90 | |
| 91 | /* |
| 92 | * every tree block (leaf or node) starts with this header. |
| 93 | */ |
| 94 | struct btrfs_header { |
| 95 | u8 csum[BTRFS_CSUM_SIZE]; |
| 96 | u8 fsid[16]; /* FS specific uuid */ |
| 97 | __le64 blocknr; /* which block this node is supposed to live in */ |
| 98 | __le64 generation; |
| 99 | __le64 owner; |
| 100 | __le16 nritems; |
| 101 | __le16 flags; |
| 102 | u8 level; |
| 103 | } __attribute__ ((__packed__)); |
| 104 | |
| 105 | #define BTRFS_MAX_LEVEL 8 |
| 106 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->blocksize - \ |
| 107 | sizeof(struct btrfs_header)) / \ |
| 108 | (sizeof(struct btrfs_disk_key) + sizeof(u64))) |
| 109 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| 110 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->blocksize)) |
| 111 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 112 | sizeof(struct btrfs_item) - \ |
| 113 | sizeof(struct btrfs_file_extent_item)) |
| 114 | |
| 115 | struct buffer_head; |
| 116 | /* |
| 117 | * the super block basically lists the main trees of the FS |
| 118 | * it currently lacks any block count etc etc |
| 119 | */ |
| 120 | struct btrfs_super_block { |
| 121 | u8 csum[BTRFS_CSUM_SIZE]; |
| 122 | /* the first 3 fields must match struct btrfs_header */ |
| 123 | u8 fsid[16]; /* FS specific uuid */ |
| 124 | __le64 blocknr; /* this block number */ |
| 125 | __le64 magic; |
| 126 | __le64 generation; |
| 127 | __le64 root; |
| 128 | __le64 total_blocks; |
| 129 | __le64 blocks_used; |
| 130 | __le64 root_dir_objectid; |
| 131 | __le32 blocksize; |
| 132 | } __attribute__ ((__packed__)); |
| 133 | |
| 134 | /* |
| 135 | * A leaf is full of items. offset and size tell us where to find |
| 136 | * the item in the leaf (relative to the start of the data area) |
| 137 | */ |
| 138 | struct btrfs_item { |
| 139 | struct btrfs_disk_key key; |
| 140 | __le32 offset; |
| 141 | __le16 size; |
| 142 | } __attribute__ ((__packed__)); |
| 143 | |
| 144 | /* |
| 145 | * leaves have an item area and a data area: |
| 146 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 147 | * |
| 148 | * The data is separate from the items to get the keys closer together |
| 149 | * during searches. |
| 150 | */ |
| 151 | struct btrfs_leaf { |
| 152 | struct btrfs_header header; |
| 153 | struct btrfs_item items[]; |
| 154 | } __attribute__ ((__packed__)); |
| 155 | |
| 156 | /* |
| 157 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 158 | * other blocks |
| 159 | */ |
| 160 | struct btrfs_key_ptr { |
| 161 | struct btrfs_disk_key key; |
| 162 | __le64 blockptr; |
| 163 | } __attribute__ ((__packed__)); |
| 164 | |
| 165 | struct btrfs_node { |
| 166 | struct btrfs_header header; |
| 167 | struct btrfs_key_ptr ptrs[]; |
| 168 | } __attribute__ ((__packed__)); |
| 169 | |
| 170 | /* |
| 171 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 172 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point |
| 173 | * to any other levels that are present. |
| 174 | * |
| 175 | * The slots array records the index of the item or block pointer |
| 176 | * used while walking the tree. |
| 177 | */ |
| 178 | struct btrfs_path { |
| 179 | struct buffer_head *nodes[BTRFS_MAX_LEVEL]; |
| 180 | int slots[BTRFS_MAX_LEVEL]; |
| 181 | int reada; |
| 182 | int lowest_level; |
| 183 | }; |
| 184 | |
| 185 | /* |
| 186 | * items in the extent btree are used to record the objectid of the |
| 187 | * owner of the block and the number of references |
| 188 | */ |
| 189 | struct btrfs_extent_item { |
| 190 | __le32 refs; |
| 191 | __le64 owner; |
| 192 | } __attribute__ ((__packed__)); |
| 193 | |
| 194 | struct btrfs_inode_timespec { |
| 195 | __le64 sec; |
| 196 | __le32 nsec; |
| 197 | } __attribute__ ((__packed__)); |
| 198 | |
| 199 | /* |
| 200 | * there is no padding here on purpose. If you want to extent the inode, |
| 201 | * make a new item type |
| 202 | */ |
| 203 | struct btrfs_inode_item { |
| 204 | __le64 generation; |
| 205 | __le64 size; |
| 206 | __le64 nblocks; |
| 207 | __le64 block_group; |
| 208 | __le32 nlink; |
| 209 | __le32 uid; |
| 210 | __le32 gid; |
| 211 | __le32 mode; |
| 212 | __le32 rdev; |
| 213 | __le16 flags; |
| 214 | __le16 compat_flags; |
| 215 | struct btrfs_inode_timespec atime; |
| 216 | struct btrfs_inode_timespec ctime; |
| 217 | struct btrfs_inode_timespec mtime; |
| 218 | struct btrfs_inode_timespec otime; |
| 219 | } __attribute__ ((__packed__)); |
| 220 | |
| 221 | struct btrfs_dir_item { |
| 222 | struct btrfs_disk_key location; |
| 223 | __le16 flags; |
| 224 | __le16 name_len; |
| 225 | u8 type; |
| 226 | } __attribute__ ((__packed__)); |
| 227 | |
| 228 | struct btrfs_root_item { |
| 229 | struct btrfs_inode_item inode; |
| 230 | __le64 root_dirid; |
| 231 | __le64 blocknr; |
| 232 | __le64 block_limit; |
| 233 | __le64 blocks_used; |
| 234 | __le32 flags; |
| 235 | __le32 refs; |
| 236 | struct btrfs_disk_key drop_progress; |
| 237 | u8 drop_level; |
| 238 | } __attribute__ ((__packed__)); |
| 239 | |
| 240 | #define BTRFS_FILE_EXTENT_REG 0 |
| 241 | #define BTRFS_FILE_EXTENT_INLINE 1 |
| 242 | |
| 243 | struct btrfs_file_extent_item { |
| 244 | __le64 generation; |
| 245 | u8 type; |
| 246 | /* |
| 247 | * disk space consumed by the extent, checksum blocks are included |
| 248 | * in these numbers |
| 249 | */ |
| 250 | __le64 disk_blocknr; |
| 251 | __le64 disk_num_blocks; |
| 252 | /* |
| 253 | * the logical offset in file blocks (no csums) |
| 254 | * this extent record is for. This allows a file extent to point |
| 255 | * into the middle of an existing extent on disk, sharing it |
| 256 | * between two snapshots (useful if some bytes in the middle of the |
| 257 | * extent have changed |
| 258 | */ |
| 259 | __le64 offset; |
| 260 | /* |
| 261 | * the logical number of file blocks (no csums included) |
| 262 | */ |
| 263 | __le64 num_blocks; |
| 264 | } __attribute__ ((__packed__)); |
| 265 | |
| 266 | struct btrfs_csum_item { |
| 267 | u8 csum; |
| 268 | } __attribute__ ((__packed__)); |
| 269 | |
| 270 | /* tag for the radix tree of block groups in ram */ |
| 271 | #define BTRFS_BLOCK_GROUP_DIRTY 0 |
| 272 | #define BTRFS_BLOCK_GROUP_AVAIL 1 |
| 273 | #define BTRFS_BLOCK_GROUP_SIZE (256 * 1024 * 1024) |
| 274 | |
| 275 | |
| 276 | #define BTRFS_BLOCK_GROUP_DATA 1 |
| 277 | struct btrfs_block_group_item { |
| 278 | __le64 used; |
| 279 | u8 flags; |
| 280 | } __attribute__ ((__packed__)); |
| 281 | |
| 282 | struct btrfs_block_group_cache { |
| 283 | struct btrfs_key key; |
| 284 | struct btrfs_block_group_item item; |
| 285 | struct radix_tree_root *radix; |
| 286 | u64 first_free; |
| 287 | u64 last_alloc; |
| 288 | u64 pinned; |
| 289 | u64 last_prealloc; |
| 290 | int data; |
| 291 | int cached; |
| 292 | }; |
| 293 | |
| 294 | struct btrfs_fs_info { |
| 295 | struct btrfs_root *extent_root; |
| 296 | struct btrfs_root *tree_root; |
| 297 | struct radix_tree_root fs_roots_radix; |
| 298 | struct radix_tree_root pending_del_radix; |
| 299 | struct radix_tree_root pinned_radix; |
| 300 | struct radix_tree_root block_group_radix; |
| 301 | struct radix_tree_root block_group_data_radix; |
| 302 | struct radix_tree_root extent_map_radix; |
| 303 | struct radix_tree_root extent_ins_radix; |
| 304 | u64 generation; |
| 305 | u64 last_trans_committed; |
| 306 | struct btrfs_transaction *running_transaction; |
| 307 | struct btrfs_super_block *disk_super; |
| 308 | struct btrfs_super_block super_copy; |
| 309 | struct buffer_head *sb_buffer; |
| 310 | struct super_block *sb; |
| 311 | struct inode *btree_inode; |
| 312 | struct mutex trans_mutex; |
| 313 | struct mutex fs_mutex; |
| 314 | struct list_head trans_list; |
| 315 | struct list_head dead_roots; |
| 316 | struct delayed_work trans_work; |
| 317 | struct kobject super_kobj; |
| 318 | struct completion kobj_unregister; |
| 319 | int do_barriers; |
| 320 | int closing; |
| 321 | }; |
| 322 | |
| 323 | /* |
| 324 | * in ram representation of the tree. extent_root is used for all allocations |
| 325 | * and for the extent tree extent_root root. |
| 326 | */ |
| 327 | struct btrfs_root { |
| 328 | struct buffer_head *node; |
| 329 | struct buffer_head *commit_root; |
| 330 | struct btrfs_root_item root_item; |
| 331 | struct btrfs_key root_key; |
| 332 | struct btrfs_fs_info *fs_info; |
| 333 | struct inode *inode; |
| 334 | struct kobject root_kobj; |
| 335 | struct completion kobj_unregister; |
| 336 | u64 objectid; |
| 337 | u64 last_trans; |
| 338 | u32 blocksize; |
| 339 | u32 type; |
| 340 | u64 highest_inode; |
| 341 | u64 last_inode_alloc; |
| 342 | int ref_cows; |
| 343 | struct btrfs_key defrag_progress; |
| 344 | int defrag_running; |
| 345 | int defrag_level; |
| 346 | char *name; |
| 347 | }; |
| 348 | |
| 349 | /* the lower bits in the key flags defines the item type */ |
| 350 | #define BTRFS_KEY_TYPE_MAX 256 |
| 351 | #define BTRFS_KEY_TYPE_SHIFT 24 |
| 352 | #define BTRFS_KEY_TYPE_MASK (((u32)BTRFS_KEY_TYPE_MAX - 1) << \ |
| 353 | BTRFS_KEY_TYPE_SHIFT) |
| 354 | |
| 355 | /* |
| 356 | * inode items have the data typically returned from stat and store other |
| 357 | * info about object characteristics. There is one for every file and dir in |
| 358 | * the FS |
| 359 | */ |
| 360 | #define BTRFS_INODE_ITEM_KEY 1 |
| 361 | |
| 362 | /* reserve 2-15 close to the inode for later flexibility */ |
| 363 | |
| 364 | /* |
| 365 | * dir items are the name -> inode pointers in a directory. There is one |
| 366 | * for every name in a directory. |
| 367 | */ |
| 368 | #define BTRFS_DIR_ITEM_KEY 16 |
| 369 | #define BTRFS_DIR_INDEX_KEY 17 |
| 370 | /* |
| 371 | * extent data is for file data |
| 372 | */ |
| 373 | #define BTRFS_EXTENT_DATA_KEY 18 |
| 374 | /* |
| 375 | * csum items have the checksums for data in the extents |
| 376 | */ |
| 377 | #define BTRFS_CSUM_ITEM_KEY 19 |
| 378 | |
| 379 | /* reserve 20-31 for other file stuff */ |
| 380 | |
| 381 | /* |
| 382 | * root items point to tree roots. There are typically in the root |
| 383 | * tree used by the super block to find all the other trees |
| 384 | */ |
| 385 | #define BTRFS_ROOT_ITEM_KEY 32 |
| 386 | /* |
| 387 | * extent items are in the extent map tree. These record which blocks |
| 388 | * are used, and how many references there are to each block |
| 389 | */ |
| 390 | #define BTRFS_EXTENT_ITEM_KEY 33 |
| 391 | |
| 392 | /* |
| 393 | * block groups give us hints into the extent allocation trees. Which |
| 394 | * blocks are free etc etc |
| 395 | */ |
| 396 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 34 |
| 397 | |
| 398 | /* |
| 399 | * string items are for debugging. They just store a short string of |
| 400 | * data in the FS |
| 401 | */ |
| 402 | #define BTRFS_STRING_ITEM_KEY 253 |
| 403 | |
| 404 | |
| 405 | static inline u64 btrfs_block_group_used(struct btrfs_block_group_item *bi) |
| 406 | { |
| 407 | return le64_to_cpu(bi->used); |
| 408 | } |
| 409 | |
| 410 | static inline void btrfs_set_block_group_used(struct |
| 411 | btrfs_block_group_item *bi, |
| 412 | u64 val) |
| 413 | { |
| 414 | bi->used = cpu_to_le64(val); |
| 415 | } |
| 416 | |
| 417 | static inline u64 btrfs_inode_generation(struct btrfs_inode_item *i) |
| 418 | { |
| 419 | return le64_to_cpu(i->generation); |
| 420 | } |
| 421 | |
| 422 | static inline void btrfs_set_inode_generation(struct btrfs_inode_item *i, |
| 423 | u64 val) |
| 424 | { |
| 425 | i->generation = cpu_to_le64(val); |
| 426 | } |
| 427 | |
| 428 | static inline u64 btrfs_inode_size(struct btrfs_inode_item *i) |
| 429 | { |
| 430 | return le64_to_cpu(i->size); |
| 431 | } |
| 432 | |
| 433 | static inline void btrfs_set_inode_size(struct btrfs_inode_item *i, u64 val) |
| 434 | { |
| 435 | i->size = cpu_to_le64(val); |
| 436 | } |
| 437 | |
| 438 | static inline u64 btrfs_inode_nblocks(struct btrfs_inode_item *i) |
| 439 | { |
| 440 | return le64_to_cpu(i->nblocks); |
| 441 | } |
| 442 | |
| 443 | static inline void btrfs_set_inode_nblocks(struct btrfs_inode_item *i, u64 val) |
| 444 | { |
| 445 | i->nblocks = cpu_to_le64(val); |
| 446 | } |
| 447 | |
| 448 | static inline u64 btrfs_inode_block_group(struct btrfs_inode_item *i) |
| 449 | { |
| 450 | return le64_to_cpu(i->block_group); |
| 451 | } |
| 452 | |
| 453 | static inline void btrfs_set_inode_block_group(struct btrfs_inode_item *i, |
| 454 | u64 val) |
| 455 | { |
| 456 | i->block_group = cpu_to_le64(val); |
| 457 | } |
| 458 | |
| 459 | static inline u32 btrfs_inode_nlink(struct btrfs_inode_item *i) |
| 460 | { |
| 461 | return le32_to_cpu(i->nlink); |
| 462 | } |
| 463 | |
| 464 | static inline void btrfs_set_inode_nlink(struct btrfs_inode_item *i, u32 val) |
| 465 | { |
| 466 | i->nlink = cpu_to_le32(val); |
| 467 | } |
| 468 | |
| 469 | static inline u32 btrfs_inode_uid(struct btrfs_inode_item *i) |
| 470 | { |
| 471 | return le32_to_cpu(i->uid); |
| 472 | } |
| 473 | |
| 474 | static inline void btrfs_set_inode_uid(struct btrfs_inode_item *i, u32 val) |
| 475 | { |
| 476 | i->uid = cpu_to_le32(val); |
| 477 | } |
| 478 | |
| 479 | static inline u32 btrfs_inode_gid(struct btrfs_inode_item *i) |
| 480 | { |
| 481 | return le32_to_cpu(i->gid); |
| 482 | } |
| 483 | |
| 484 | static inline void btrfs_set_inode_gid(struct btrfs_inode_item *i, u32 val) |
| 485 | { |
| 486 | i->gid = cpu_to_le32(val); |
| 487 | } |
| 488 | |
| 489 | static inline u32 btrfs_inode_mode(struct btrfs_inode_item *i) |
| 490 | { |
| 491 | return le32_to_cpu(i->mode); |
| 492 | } |
| 493 | |
| 494 | static inline void btrfs_set_inode_mode(struct btrfs_inode_item *i, u32 val) |
| 495 | { |
| 496 | i->mode = cpu_to_le32(val); |
| 497 | } |
| 498 | |
| 499 | static inline u32 btrfs_inode_rdev(struct btrfs_inode_item *i) |
| 500 | { |
| 501 | return le32_to_cpu(i->rdev); |
| 502 | } |
| 503 | |
| 504 | static inline void btrfs_set_inode_rdev(struct btrfs_inode_item *i, u32 val) |
| 505 | { |
| 506 | i->rdev = cpu_to_le32(val); |
| 507 | } |
| 508 | |
| 509 | static inline u16 btrfs_inode_flags(struct btrfs_inode_item *i) |
| 510 | { |
| 511 | return le16_to_cpu(i->flags); |
| 512 | } |
| 513 | |
| 514 | static inline void btrfs_set_inode_flags(struct btrfs_inode_item *i, u16 val) |
| 515 | { |
| 516 | i->flags = cpu_to_le16(val); |
| 517 | } |
| 518 | |
| 519 | static inline u16 btrfs_inode_compat_flags(struct btrfs_inode_item *i) |
| 520 | { |
| 521 | return le16_to_cpu(i->compat_flags); |
| 522 | } |
| 523 | |
| 524 | static inline void btrfs_set_inode_compat_flags(struct btrfs_inode_item *i, |
| 525 | u16 val) |
| 526 | { |
| 527 | i->compat_flags = cpu_to_le16(val); |
| 528 | } |
| 529 | |
| 530 | static inline u64 btrfs_timespec_sec(struct btrfs_inode_timespec *ts) |
| 531 | { |
| 532 | return le64_to_cpu(ts->sec); |
| 533 | } |
| 534 | |
| 535 | static inline void btrfs_set_timespec_sec(struct btrfs_inode_timespec *ts, |
| 536 | u64 val) |
| 537 | { |
| 538 | ts->sec = cpu_to_le64(val); |
| 539 | } |
| 540 | |
| 541 | static inline u32 btrfs_timespec_nsec(struct btrfs_inode_timespec *ts) |
| 542 | { |
| 543 | return le32_to_cpu(ts->nsec); |
| 544 | } |
| 545 | |
| 546 | static inline void btrfs_set_timespec_nsec(struct btrfs_inode_timespec *ts, |
| 547 | u32 val) |
| 548 | { |
| 549 | ts->nsec = cpu_to_le32(val); |
| 550 | } |
| 551 | |
| 552 | static inline u32 btrfs_extent_refs(struct btrfs_extent_item *ei) |
| 553 | { |
| 554 | return le32_to_cpu(ei->refs); |
| 555 | } |
| 556 | |
| 557 | static inline void btrfs_set_extent_refs(struct btrfs_extent_item *ei, u32 val) |
| 558 | { |
| 559 | ei->refs = cpu_to_le32(val); |
| 560 | } |
| 561 | |
| 562 | static inline u64 btrfs_extent_owner(struct btrfs_extent_item *ei) |
| 563 | { |
| 564 | return le64_to_cpu(ei->owner); |
| 565 | } |
| 566 | |
| 567 | static inline void btrfs_set_extent_owner(struct btrfs_extent_item *ei, u64 val) |
| 568 | { |
| 569 | ei->owner = cpu_to_le64(val); |
| 570 | } |
| 571 | |
| 572 | static inline u64 btrfs_node_blockptr(struct btrfs_node *n, int nr) |
| 573 | { |
| 574 | return le64_to_cpu(n->ptrs[nr].blockptr); |
| 575 | } |
| 576 | |
| 577 | |
| 578 | static inline void btrfs_set_node_blockptr(struct btrfs_node *n, int nr, |
| 579 | u64 val) |
| 580 | { |
| 581 | n->ptrs[nr].blockptr = cpu_to_le64(val); |
| 582 | } |
| 583 | |
| 584 | static inline u32 btrfs_item_offset(struct btrfs_item *item) |
| 585 | { |
| 586 | return le32_to_cpu(item->offset); |
| 587 | } |
| 588 | |
| 589 | static inline void btrfs_set_item_offset(struct btrfs_item *item, u32 val) |
| 590 | { |
| 591 | item->offset = cpu_to_le32(val); |
| 592 | } |
| 593 | |
| 594 | static inline u32 btrfs_item_end(struct btrfs_item *item) |
| 595 | { |
| 596 | return le32_to_cpu(item->offset) + le16_to_cpu(item->size); |
| 597 | } |
| 598 | |
| 599 | static inline u16 btrfs_item_size(struct btrfs_item *item) |
| 600 | { |
| 601 | return le16_to_cpu(item->size); |
| 602 | } |
| 603 | |
| 604 | static inline void btrfs_set_item_size(struct btrfs_item *item, u16 val) |
| 605 | { |
| 606 | item->size = cpu_to_le16(val); |
| 607 | } |
| 608 | |
| 609 | static inline u16 btrfs_dir_flags(struct btrfs_dir_item *d) |
| 610 | { |
| 611 | return le16_to_cpu(d->flags); |
| 612 | } |
| 613 | |
| 614 | static inline void btrfs_set_dir_flags(struct btrfs_dir_item *d, u16 val) |
| 615 | { |
| 616 | d->flags = cpu_to_le16(val); |
| 617 | } |
| 618 | |
| 619 | static inline u8 btrfs_dir_type(struct btrfs_dir_item *d) |
| 620 | { |
| 621 | return d->type; |
| 622 | } |
| 623 | |
| 624 | static inline void btrfs_set_dir_type(struct btrfs_dir_item *d, u8 val) |
| 625 | { |
| 626 | d->type = val; |
| 627 | } |
| 628 | |
| 629 | static inline u16 btrfs_dir_name_len(struct btrfs_dir_item *d) |
| 630 | { |
| 631 | return le16_to_cpu(d->name_len); |
| 632 | } |
| 633 | |
| 634 | static inline void btrfs_set_dir_name_len(struct btrfs_dir_item *d, u16 val) |
| 635 | { |
| 636 | d->name_len = cpu_to_le16(val); |
| 637 | } |
| 638 | |
| 639 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 640 | struct btrfs_disk_key *disk) |
| 641 | { |
| 642 | cpu->offset = le64_to_cpu(disk->offset); |
| 643 | cpu->flags = le32_to_cpu(disk->flags); |
| 644 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 645 | } |
| 646 | |
| 647 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 648 | struct btrfs_key *cpu) |
| 649 | { |
| 650 | disk->offset = cpu_to_le64(cpu->offset); |
| 651 | disk->flags = cpu_to_le32(cpu->flags); |
| 652 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 653 | } |
| 654 | |
| 655 | static inline u64 btrfs_disk_key_objectid(struct btrfs_disk_key *disk) |
| 656 | { |
| 657 | return le64_to_cpu(disk->objectid); |
| 658 | } |
| 659 | |
| 660 | static inline void btrfs_set_disk_key_objectid(struct btrfs_disk_key *disk, |
| 661 | u64 val) |
| 662 | { |
| 663 | disk->objectid = cpu_to_le64(val); |
| 664 | } |
| 665 | |
| 666 | static inline u64 btrfs_disk_key_offset(struct btrfs_disk_key *disk) |
| 667 | { |
| 668 | return le64_to_cpu(disk->offset); |
| 669 | } |
| 670 | |
| 671 | static inline void btrfs_set_disk_key_offset(struct btrfs_disk_key *disk, |
| 672 | u64 val) |
| 673 | { |
| 674 | disk->offset = cpu_to_le64(val); |
| 675 | } |
| 676 | |
| 677 | static inline u32 btrfs_disk_key_flags(struct btrfs_disk_key *disk) |
| 678 | { |
| 679 | return le32_to_cpu(disk->flags); |
| 680 | } |
| 681 | |
| 682 | static inline void btrfs_set_disk_key_flags(struct btrfs_disk_key *disk, |
| 683 | u32 val) |
| 684 | { |
| 685 | disk->flags = cpu_to_le32(val); |
| 686 | } |
| 687 | |
| 688 | static inline u32 btrfs_disk_key_type(struct btrfs_disk_key *key) |
| 689 | { |
| 690 | return le32_to_cpu(key->flags) >> BTRFS_KEY_TYPE_SHIFT; |
| 691 | } |
| 692 | |
| 693 | static inline void btrfs_set_disk_key_type(struct btrfs_disk_key *key, |
| 694 | u32 val) |
| 695 | { |
| 696 | u32 flags = btrfs_disk_key_flags(key); |
| 697 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
| 698 | val = val << BTRFS_KEY_TYPE_SHIFT; |
| 699 | flags = (flags & ~BTRFS_KEY_TYPE_MASK) | val; |
| 700 | btrfs_set_disk_key_flags(key, flags); |
| 701 | } |
| 702 | |
| 703 | static inline u32 btrfs_key_type(struct btrfs_key *key) |
| 704 | { |
| 705 | return key->flags >> BTRFS_KEY_TYPE_SHIFT; |
| 706 | } |
| 707 | |
| 708 | static inline void btrfs_set_key_type(struct btrfs_key *key, u32 val) |
| 709 | { |
| 710 | BUG_ON(val >= BTRFS_KEY_TYPE_MAX); |
| 711 | val = val << BTRFS_KEY_TYPE_SHIFT; |
| 712 | key->flags = (key->flags & ~(BTRFS_KEY_TYPE_MASK)) | val; |
| 713 | } |
| 714 | |
| 715 | static inline u64 btrfs_header_blocknr(struct btrfs_header *h) |
| 716 | { |
| 717 | return le64_to_cpu(h->blocknr); |
| 718 | } |
| 719 | |
| 720 | static inline void btrfs_set_header_blocknr(struct btrfs_header *h, u64 blocknr) |
| 721 | { |
| 722 | h->blocknr = cpu_to_le64(blocknr); |
| 723 | } |
| 724 | |
| 725 | static inline u64 btrfs_header_generation(struct btrfs_header *h) |
| 726 | { |
| 727 | return le64_to_cpu(h->generation); |
| 728 | } |
| 729 | |
| 730 | static inline void btrfs_set_header_generation(struct btrfs_header *h, |
| 731 | u64 val) |
| 732 | { |
| 733 | h->generation = cpu_to_le64(val); |
| 734 | } |
| 735 | |
| 736 | static inline u64 btrfs_header_owner(struct btrfs_header *h) |
| 737 | { |
| 738 | return le64_to_cpu(h->owner); |
| 739 | } |
| 740 | |
| 741 | static inline void btrfs_set_header_owner(struct btrfs_header *h, |
| 742 | u64 val) |
| 743 | { |
| 744 | h->owner = cpu_to_le64(val); |
| 745 | } |
| 746 | |
| 747 | static inline u16 btrfs_header_nritems(struct btrfs_header *h) |
| 748 | { |
| 749 | return le16_to_cpu(h->nritems); |
| 750 | } |
| 751 | |
| 752 | static inline void btrfs_set_header_nritems(struct btrfs_header *h, u16 val) |
| 753 | { |
| 754 | h->nritems = cpu_to_le16(val); |
| 755 | } |
| 756 | |
| 757 | static inline u16 btrfs_header_flags(struct btrfs_header *h) |
| 758 | { |
| 759 | return le16_to_cpu(h->flags); |
| 760 | } |
| 761 | |
| 762 | static inline void btrfs_set_header_flags(struct btrfs_header *h, u16 val) |
| 763 | { |
| 764 | h->flags = cpu_to_le16(val); |
| 765 | } |
| 766 | |
| 767 | static inline int btrfs_header_level(struct btrfs_header *h) |
| 768 | { |
| 769 | return h->level; |
| 770 | } |
| 771 | |
| 772 | static inline void btrfs_set_header_level(struct btrfs_header *h, int level) |
| 773 | { |
| 774 | BUG_ON(level > BTRFS_MAX_LEVEL); |
| 775 | h->level = level; |
| 776 | } |
| 777 | |
| 778 | static inline int btrfs_is_leaf(struct btrfs_node *n) |
| 779 | { |
| 780 | return (btrfs_header_level(&n->header) == 0); |
| 781 | } |
| 782 | |
| 783 | static inline u64 btrfs_root_blocknr(struct btrfs_root_item *item) |
| 784 | { |
| 785 | return le64_to_cpu(item->blocknr); |
| 786 | } |
| 787 | |
| 788 | static inline void btrfs_set_root_blocknr(struct btrfs_root_item *item, u64 val) |
| 789 | { |
| 790 | item->blocknr = cpu_to_le64(val); |
| 791 | } |
| 792 | |
| 793 | static inline u64 btrfs_root_dirid(struct btrfs_root_item *item) |
| 794 | { |
| 795 | return le64_to_cpu(item->root_dirid); |
| 796 | } |
| 797 | |
| 798 | static inline void btrfs_set_root_dirid(struct btrfs_root_item *item, u64 val) |
| 799 | { |
| 800 | item->root_dirid = cpu_to_le64(val); |
| 801 | } |
| 802 | |
| 803 | static inline u32 btrfs_root_refs(struct btrfs_root_item *item) |
| 804 | { |
| 805 | return le32_to_cpu(item->refs); |
| 806 | } |
| 807 | |
| 808 | static inline void btrfs_set_root_refs(struct btrfs_root_item *item, u32 val) |
| 809 | { |
| 810 | item->refs = cpu_to_le32(val); |
| 811 | } |
| 812 | |
| 813 | static inline u32 btrfs_root_flags(struct btrfs_root_item *item) |
| 814 | { |
| 815 | return le32_to_cpu(item->flags); |
| 816 | } |
| 817 | |
| 818 | static inline void btrfs_set_root_flags(struct btrfs_root_item *item, u32 val) |
| 819 | { |
| 820 | item->flags = cpu_to_le32(val); |
| 821 | } |
| 822 | |
| 823 | static inline void btrfs_set_root_blocks_used(struct btrfs_root_item *item, |
| 824 | u64 val) |
| 825 | { |
| 826 | item->blocks_used = cpu_to_le64(val); |
| 827 | } |
| 828 | |
| 829 | static inline u64 btrfs_root_blocks_used(struct btrfs_root_item *item) |
| 830 | { |
| 831 | return le64_to_cpu(item->blocks_used); |
| 832 | } |
| 833 | |
| 834 | static inline void btrfs_set_root_block_limit(struct btrfs_root_item *item, |
| 835 | u64 val) |
| 836 | { |
| 837 | item->block_limit = cpu_to_le64(val); |
| 838 | } |
| 839 | |
| 840 | static inline u64 btrfs_root_block_limit(struct btrfs_root_item *item) |
| 841 | { |
| 842 | return le64_to_cpu(item->block_limit); |
| 843 | } |
| 844 | |
| 845 | static inline u64 btrfs_super_blocknr(struct btrfs_super_block *s) |
| 846 | { |
| 847 | return le64_to_cpu(s->blocknr); |
| 848 | } |
| 849 | |
| 850 | static inline void btrfs_set_super_blocknr(struct btrfs_super_block *s, u64 val) |
| 851 | { |
| 852 | s->blocknr = cpu_to_le64(val); |
| 853 | } |
| 854 | |
| 855 | static inline u64 btrfs_super_generation(struct btrfs_super_block *s) |
| 856 | { |
| 857 | return le64_to_cpu(s->generation); |
| 858 | } |
| 859 | |
| 860 | static inline void btrfs_set_super_generation(struct btrfs_super_block *s, |
| 861 | u64 val) |
| 862 | { |
| 863 | s->generation = cpu_to_le64(val); |
| 864 | } |
| 865 | |
| 866 | static inline u64 btrfs_super_root(struct btrfs_super_block *s) |
| 867 | { |
| 868 | return le64_to_cpu(s->root); |
| 869 | } |
| 870 | |
| 871 | static inline void btrfs_set_super_root(struct btrfs_super_block *s, u64 val) |
| 872 | { |
| 873 | s->root = cpu_to_le64(val); |
| 874 | } |
| 875 | |
| 876 | static inline u64 btrfs_super_total_blocks(struct btrfs_super_block *s) |
| 877 | { |
| 878 | return le64_to_cpu(s->total_blocks); |
| 879 | } |
| 880 | |
| 881 | static inline void btrfs_set_super_total_blocks(struct btrfs_super_block *s, |
| 882 | u64 val) |
| 883 | { |
| 884 | s->total_blocks = cpu_to_le64(val); |
| 885 | } |
| 886 | |
| 887 | static inline u64 btrfs_super_blocks_used(struct btrfs_super_block *s) |
| 888 | { |
| 889 | return le64_to_cpu(s->blocks_used); |
| 890 | } |
| 891 | |
| 892 | static inline void btrfs_set_super_blocks_used(struct btrfs_super_block *s, |
| 893 | u64 val) |
| 894 | { |
| 895 | s->blocks_used = cpu_to_le64(val); |
| 896 | } |
| 897 | |
| 898 | static inline u32 btrfs_super_blocksize(struct btrfs_super_block *s) |
| 899 | { |
| 900 | return le32_to_cpu(s->blocksize); |
| 901 | } |
| 902 | |
| 903 | static inline void btrfs_set_super_blocksize(struct btrfs_super_block *s, |
| 904 | u32 val) |
| 905 | { |
| 906 | s->blocksize = cpu_to_le32(val); |
| 907 | } |
| 908 | |
| 909 | static inline u64 btrfs_super_root_dir(struct btrfs_super_block *s) |
| 910 | { |
| 911 | return le64_to_cpu(s->root_dir_objectid); |
| 912 | } |
| 913 | |
| 914 | static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64 |
| 915 | val) |
| 916 | { |
| 917 | s->root_dir_objectid = cpu_to_le64(val); |
| 918 | } |
| 919 | |
| 920 | static inline u8 *btrfs_leaf_data(struct btrfs_leaf *l) |
| 921 | { |
| 922 | return (u8 *)l->items; |
| 923 | } |
| 924 | |
| 925 | static inline int btrfs_file_extent_type(struct btrfs_file_extent_item *e) |
| 926 | { |
| 927 | return e->type; |
| 928 | } |
| 929 | static inline void btrfs_set_file_extent_type(struct btrfs_file_extent_item *e, |
| 930 | u8 val) |
| 931 | { |
| 932 | e->type = val; |
| 933 | } |
| 934 | |
| 935 | static inline char *btrfs_file_extent_inline_start(struct |
| 936 | btrfs_file_extent_item *e) |
| 937 | { |
| 938 | return (char *)(&e->disk_blocknr); |
| 939 | } |
| 940 | |
| 941 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 942 | { |
| 943 | return (unsigned long)(&((struct |
| 944 | btrfs_file_extent_item *)NULL)->disk_blocknr) + datasize; |
| 945 | } |
| 946 | |
| 947 | static inline u32 btrfs_file_extent_inline_len(struct btrfs_item *e) |
| 948 | { |
| 949 | struct btrfs_file_extent_item *fe = NULL; |
| 950 | return btrfs_item_size(e) - (unsigned long)(&fe->disk_blocknr); |
| 951 | } |
| 952 | |
| 953 | static inline u64 btrfs_file_extent_disk_blocknr(struct btrfs_file_extent_item |
| 954 | *e) |
| 955 | { |
| 956 | return le64_to_cpu(e->disk_blocknr); |
| 957 | } |
| 958 | |
| 959 | static inline void btrfs_set_file_extent_disk_blocknr(struct |
| 960 | btrfs_file_extent_item |
| 961 | *e, u64 val) |
| 962 | { |
| 963 | e->disk_blocknr = cpu_to_le64(val); |
| 964 | } |
| 965 | |
| 966 | static inline u64 btrfs_file_extent_generation(struct btrfs_file_extent_item *e) |
| 967 | { |
| 968 | return le64_to_cpu(e->generation); |
| 969 | } |
| 970 | |
| 971 | static inline void btrfs_set_file_extent_generation(struct |
| 972 | btrfs_file_extent_item *e, |
| 973 | u64 val) |
| 974 | { |
| 975 | e->generation = cpu_to_le64(val); |
| 976 | } |
| 977 | |
| 978 | static inline u64 btrfs_file_extent_disk_num_blocks(struct |
| 979 | btrfs_file_extent_item *e) |
| 980 | { |
| 981 | return le64_to_cpu(e->disk_num_blocks); |
| 982 | } |
| 983 | |
| 984 | static inline void btrfs_set_file_extent_disk_num_blocks(struct |
| 985 | btrfs_file_extent_item |
| 986 | *e, u64 val) |
| 987 | { |
| 988 | e->disk_num_blocks = cpu_to_le64(val); |
| 989 | } |
| 990 | |
| 991 | static inline u64 btrfs_file_extent_offset(struct btrfs_file_extent_item *e) |
| 992 | { |
| 993 | return le64_to_cpu(e->offset); |
| 994 | } |
| 995 | |
| 996 | static inline void btrfs_set_file_extent_offset(struct btrfs_file_extent_item |
| 997 | *e, u64 val) |
| 998 | { |
| 999 | e->offset = cpu_to_le64(val); |
| 1000 | } |
| 1001 | |
| 1002 | static inline u64 btrfs_file_extent_num_blocks(struct btrfs_file_extent_item |
| 1003 | *e) |
| 1004 | { |
| 1005 | return le64_to_cpu(e->num_blocks); |
| 1006 | } |
| 1007 | |
| 1008 | static inline void btrfs_set_file_extent_num_blocks(struct |
| 1009 | btrfs_file_extent_item *e, |
| 1010 | u64 val) |
| 1011 | { |
| 1012 | e->num_blocks = cpu_to_le64(val); |
| 1013 | } |
| 1014 | |
| 1015 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 1016 | { |
| 1017 | return sb->s_fs_info; |
| 1018 | } |
| 1019 | |
| 1020 | static inline void btrfs_check_bounds(void *vptr, size_t len, |
| 1021 | void *vcontainer, size_t container_len) |
| 1022 | { |
| 1023 | char *ptr = vptr; |
| 1024 | char *container = vcontainer; |
| 1025 | WARN_ON(ptr < container); |
| 1026 | WARN_ON(ptr + len > container + container_len); |
| 1027 | } |
| 1028 | |
| 1029 | static inline void btrfs_memcpy(struct btrfs_root *root, |
| 1030 | void *dst_block, |
| 1031 | void *dst, const void *src, size_t nr) |
| 1032 | { |
| 1033 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 1034 | memcpy(dst, src, nr); |
| 1035 | } |
| 1036 | |
| 1037 | static inline void btrfs_memmove(struct btrfs_root *root, |
| 1038 | void *dst_block, |
| 1039 | void *dst, void *src, size_t nr) |
| 1040 | { |
| 1041 | btrfs_check_bounds(dst, nr, dst_block, root->fs_info->sb->s_blocksize); |
| 1042 | memmove(dst, src, nr); |
| 1043 | } |
| 1044 | |
| 1045 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
| 1046 | const char *name, int len) |
| 1047 | { |
| 1048 | /* if we already have a name just free it */ |
| 1049 | if (root->name) |
| 1050 | kfree(root->name); |
| 1051 | |
| 1052 | root->name = kmalloc(len+1, GFP_KERNEL); |
| 1053 | if (!root->name) |
| 1054 | return -ENOMEM; |
| 1055 | |
| 1056 | memcpy(root->name, name, len); |
| 1057 | root->name[len] ='\0'; |
| 1058 | |
| 1059 | return 0; |
| 1060 | } |
| 1061 | |
| 1062 | /* helper function to cast into the data area of the leaf. */ |
| 1063 | #define btrfs_item_ptr(leaf, slot, type) \ |
| 1064 | ((type *)(btrfs_leaf_data(leaf) + \ |
| 1065 | btrfs_item_offset((leaf)->items + (slot)))) |
| 1066 | |
| 1067 | /* mount option defines and helpers */ |
| 1068 | #define BTRFS_MOUNT_SUBVOL 0x000001 |
| 1069 | #define btrfs_clear_opt(o, opt) o &= ~BTRFS_MOUNT_##opt |
| 1070 | #define btrfs_set_opt(o, opt) o |= BTRFS_MOUNT_##opt |
| 1071 | #define btrfs_test_opt(sb, opt) (BTRFS_SB(sb)->s_mount_opt & \ |
| 1072 | BTRFS_MOUNT_##opt) |
| 1073 | /* extent-tree.c */ |
| 1074 | int btrfs_extent_post_op(struct btrfs_trans_handle *trans, |
| 1075 | struct btrfs_root *root); |
| 1076 | int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy); |
| 1077 | struct btrfs_block_group_cache *btrfs_lookup_block_group(struct |
| 1078 | btrfs_fs_info *info, |
| 1079 | u64 blocknr); |
| 1080 | struct btrfs_block_group_cache *btrfs_find_block_group(struct btrfs_root *root, |
| 1081 | struct btrfs_block_group_cache |
| 1082 | *hint, u64 search_start, |
| 1083 | int data, int owner); |
| 1084 | int btrfs_inc_root_ref(struct btrfs_trans_handle *trans, |
| 1085 | struct btrfs_root *root); |
| 1086 | struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| 1087 | struct btrfs_root *root, u64 hint, |
| 1088 | u64 empty_size); |
| 1089 | int btrfs_alloc_extent(struct btrfs_trans_handle *trans, |
| 1090 | struct btrfs_root *root, u64 owner, |
| 1091 | u64 num_blocks, u64 empty_size, u64 search_start, |
| 1092 | u64 search_end, struct btrfs_key *ins, int data); |
| 1093 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1094 | struct buffer_head *buf); |
| 1095 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1096 | *root, u64 blocknr, u64 num_blocks, int pin); |
| 1097 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
| 1098 | struct btrfs_root *root, |
| 1099 | struct radix_tree_root *unpin_radix); |
| 1100 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 1101 | struct btrfs_root *root, |
| 1102 | u64 blocknr, u64 num_blocks); |
| 1103 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 1104 | struct btrfs_root *root); |
| 1105 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 1106 | int btrfs_read_block_groups(struct btrfs_root *root); |
| 1107 | /* ctree.c */ |
| 1108 | int btrfs_cow_block(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1109 | *root, struct buffer_head *buf, struct buffer_head |
| 1110 | *parent, int parent_slot, struct buffer_head |
| 1111 | **cow_ret); |
| 1112 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1113 | *root, struct btrfs_path *path, u32 data_size); |
| 1114 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 1115 | struct btrfs_root *root, |
| 1116 | struct btrfs_path *path, |
| 1117 | u32 new_size); |
| 1118 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1119 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 1120 | ins_len, int cow); |
| 1121 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
| 1122 | struct btrfs_root *root, struct buffer_head *parent, |
| 1123 | int cache_only, u64 *last_ret); |
| 1124 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
| 1125 | struct btrfs_path *btrfs_alloc_path(void); |
| 1126 | void btrfs_free_path(struct btrfs_path *p); |
| 1127 | void btrfs_init_path(struct btrfs_path *p); |
| 1128 | int btrfs_del_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1129 | struct btrfs_path *path); |
| 1130 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1131 | *root, struct btrfs_key *key, void *data, u32 data_size); |
| 1132 | int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1133 | *root, struct btrfs_path *path, struct btrfs_key |
| 1134 | *cpu_key, u32 data_size); |
| 1135 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 1136 | int btrfs_leaf_free_space(struct btrfs_root *root, struct btrfs_leaf *leaf); |
| 1137 | int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1138 | *root); |
| 1139 | /* root-item.c */ |
| 1140 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 1141 | struct btrfs_key *key); |
| 1142 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1143 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1144 | *item); |
| 1145 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1146 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 1147 | *item); |
| 1148 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 1149 | btrfs_root_item *item, struct btrfs_key *key); |
| 1150 | int btrfs_find_dead_roots(struct btrfs_root *root); |
| 1151 | /* dir-item.c */ |
| 1152 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1153 | *root, const char *name, int name_len, u64 dir, |
| 1154 | struct btrfs_key *location, u8 type); |
| 1155 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 1156 | struct btrfs_root *root, |
| 1157 | struct btrfs_path *path, u64 dir, |
| 1158 | const char *name, int name_len, |
| 1159 | int mod); |
| 1160 | struct btrfs_dir_item * |
| 1161 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 1162 | struct btrfs_root *root, |
| 1163 | struct btrfs_path *path, u64 dir, |
| 1164 | u64 objectid, const char *name, int name_len, |
| 1165 | int mod); |
| 1166 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 1167 | struct btrfs_path *path, |
| 1168 | const char *name, int name_len); |
| 1169 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 1170 | struct btrfs_root *root, |
| 1171 | struct btrfs_path *path, |
| 1172 | struct btrfs_dir_item *di); |
| 1173 | /* inode-map.c */ |
| 1174 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 1175 | struct btrfs_root *fs_root, |
| 1176 | u64 dirid, u64 *objectid); |
| 1177 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 1178 | |
| 1179 | /* inode-item.c */ |
| 1180 | int btrfs_insert_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1181 | *root, u64 objectid, struct btrfs_inode_item |
| 1182 | *inode_item); |
| 1183 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 1184 | *root, struct btrfs_path *path, |
| 1185 | struct btrfs_key *location, int mod); |
| 1186 | |
| 1187 | /* file-item.c */ |
| 1188 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
| 1189 | struct btrfs_root *root, |
| 1190 | u64 objectid, u64 pos, u64 offset, |
| 1191 | u64 disk_num_blocks, |
| 1192 | u64 num_blocks); |
| 1193 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 1194 | struct btrfs_root *root, |
| 1195 | struct btrfs_path *path, u64 objectid, |
| 1196 | u64 blocknr, int mod); |
| 1197 | int btrfs_csum_file_block(struct btrfs_trans_handle *trans, |
| 1198 | struct btrfs_root *root, |
| 1199 | u64 objectid, u64 offset, |
| 1200 | char *data, size_t len); |
| 1201 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 1202 | struct btrfs_root *root, |
| 1203 | struct btrfs_path *path, |
| 1204 | u64 objectid, u64 offset, |
| 1205 | int cow); |
| 1206 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 1207 | struct btrfs_root *root, struct btrfs_path *path, |
| 1208 | u64 isize); |
| 1209 | /* inode.c */ |
| 1210 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page); |
| 1211 | int btrfs_readpage(struct file *file, struct page *page); |
| 1212 | void btrfs_delete_inode(struct inode *inode); |
| 1213 | void btrfs_read_locked_inode(struct inode *inode); |
| 1214 | int btrfs_write_inode(struct inode *inode, int wait); |
| 1215 | void btrfs_dirty_inode(struct inode *inode); |
| 1216 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 1217 | void btrfs_destroy_inode(struct inode *inode); |
| 1218 | int btrfs_init_cachep(void); |
| 1219 | void btrfs_destroy_cachep(void); |
| 1220 | int btrfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, |
| 1221 | unsigned long arg); |
| 1222 | long btrfs_compat_ioctl(struct file *file, unsigned int cmd, |
| 1223 | unsigned long arg); |
| 1224 | struct inode *btrfs_iget_locked(struct super_block *s, u64 objectid, |
| 1225 | struct btrfs_root *root); |
| 1226 | int btrfs_commit_write(struct file *file, struct page *page, |
| 1227 | unsigned from, unsigned to); |
| 1228 | int btrfs_get_block(struct inode *inode, sector_t iblock, |
| 1229 | struct buffer_head *result, int create); |
| 1230 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
| 1231 | size_t page_offset, u64 start, u64 end, |
| 1232 | int create); |
| 1233 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 1234 | struct btrfs_root *root, |
| 1235 | struct inode *inode); |
| 1236 | /* file.c */ |
| 1237 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end); |
| 1238 | extern struct file_operations btrfs_file_operations; |
| 1239 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| 1240 | struct btrfs_root *root, struct inode *inode, |
| 1241 | u64 start, u64 end, u64 *hint_block); |
| 1242 | /* tree-defrag.c */ |
| 1243 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 1244 | struct btrfs_root *root, int cache_only); |
| 1245 | |
| 1246 | /* sysfs.c */ |
| 1247 | int btrfs_init_sysfs(void); |
| 1248 | void btrfs_exit_sysfs(void); |
| 1249 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); |
| 1250 | int btrfs_sysfs_add_root(struct btrfs_root *root); |
| 1251 | void btrfs_sysfs_del_root(struct btrfs_root *root); |
| 1252 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); |
| 1253 | |
| 1254 | #endif |