| 1 | /* |
| 2 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public |
| 6 | * License v2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 11 | * General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public |
| 14 | * License along with this program; if not, write to the |
| 15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 16 | * Boston, MA 021110-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef __BTRFS_CTREE__ |
| 20 | #define __BTRFS_CTREE__ |
| 21 | |
| 22 | #include <linux/version.h> |
| 23 | #include <linux/mm.h> |
| 24 | #include <linux/highmem.h> |
| 25 | #include <linux/fs.h> |
| 26 | #include <linux/completion.h> |
| 27 | #include <linux/backing-dev.h> |
| 28 | #include <linux/wait.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <asm/kmap_types.h> |
| 31 | #include "extent_io.h" |
| 32 | #include "extent_map.h" |
| 33 | #include "async-thread.h" |
| 34 | |
| 35 | struct btrfs_trans_handle; |
| 36 | struct btrfs_transaction; |
| 37 | struct btrfs_pending_snapshot; |
| 38 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 39 | extern struct kmem_cache *btrfs_transaction_cachep; |
| 40 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
| 41 | extern struct kmem_cache *btrfs_path_cachep; |
| 42 | struct btrfs_ordered_sum; |
| 43 | |
| 44 | #define BTRFS_MAGIC "_BHRfS_M" |
| 45 | |
| 46 | #define BTRFS_MAX_LEVEL 8 |
| 47 | |
| 48 | #define BTRFS_COMPAT_EXTENT_TREE_V0 |
| 49 | |
| 50 | /* |
| 51 | * files bigger than this get some pre-flushing when they are added |
| 52 | * to the ordered operations list. That way we limit the total |
| 53 | * work done by the commit |
| 54 | */ |
| 55 | #define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024) |
| 56 | |
| 57 | /* holds pointers to all of the tree roots */ |
| 58 | #define BTRFS_ROOT_TREE_OBJECTID 1ULL |
| 59 | |
| 60 | /* stores information about which extents are in use, and reference counts */ |
| 61 | #define BTRFS_EXTENT_TREE_OBJECTID 2ULL |
| 62 | |
| 63 | /* |
| 64 | * chunk tree stores translations from logical -> physical block numbering |
| 65 | * the super block points to the chunk tree |
| 66 | */ |
| 67 | #define BTRFS_CHUNK_TREE_OBJECTID 3ULL |
| 68 | |
| 69 | /* |
| 70 | * stores information about which areas of a given device are in use. |
| 71 | * one per device. The tree of tree roots points to the device tree |
| 72 | */ |
| 73 | #define BTRFS_DEV_TREE_OBJECTID 4ULL |
| 74 | |
| 75 | /* one per subvolume, storing files and directories */ |
| 76 | #define BTRFS_FS_TREE_OBJECTID 5ULL |
| 77 | |
| 78 | /* directory objectid inside the root tree */ |
| 79 | #define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL |
| 80 | |
| 81 | /* holds checksums of all the data extents */ |
| 82 | #define BTRFS_CSUM_TREE_OBJECTID 7ULL |
| 83 | |
| 84 | /* orhpan objectid for tracking unlinked/truncated files */ |
| 85 | #define BTRFS_ORPHAN_OBJECTID -5ULL |
| 86 | |
| 87 | /* does write ahead logging to speed up fsyncs */ |
| 88 | #define BTRFS_TREE_LOG_OBJECTID -6ULL |
| 89 | #define BTRFS_TREE_LOG_FIXUP_OBJECTID -7ULL |
| 90 | |
| 91 | /* for space balancing */ |
| 92 | #define BTRFS_TREE_RELOC_OBJECTID -8ULL |
| 93 | #define BTRFS_DATA_RELOC_TREE_OBJECTID -9ULL |
| 94 | |
| 95 | /* |
| 96 | * extent checksums all have this objectid |
| 97 | * this allows them to share the logging tree |
| 98 | * for fsyncs |
| 99 | */ |
| 100 | #define BTRFS_EXTENT_CSUM_OBJECTID -10ULL |
| 101 | |
| 102 | /* For storing free space cache */ |
| 103 | #define BTRFS_FREE_SPACE_OBJECTID -11ULL |
| 104 | |
| 105 | /* dummy objectid represents multiple objectids */ |
| 106 | #define BTRFS_MULTIPLE_OBJECTIDS -255ULL |
| 107 | |
| 108 | /* |
| 109 | * All files have objectids in this range. |
| 110 | */ |
| 111 | #define BTRFS_FIRST_FREE_OBJECTID 256ULL |
| 112 | #define BTRFS_LAST_FREE_OBJECTID -256ULL |
| 113 | #define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL |
| 114 | |
| 115 | |
| 116 | /* |
| 117 | * the device items go into the chunk tree. The key is in the form |
| 118 | * [ 1 BTRFS_DEV_ITEM_KEY device_id ] |
| 119 | */ |
| 120 | #define BTRFS_DEV_ITEMS_OBJECTID 1ULL |
| 121 | |
| 122 | #define BTRFS_BTREE_INODE_OBJECTID 1 |
| 123 | |
| 124 | #define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2 |
| 125 | |
| 126 | /* |
| 127 | * we can actually store much bigger names, but lets not confuse the rest |
| 128 | * of linux |
| 129 | */ |
| 130 | #define BTRFS_NAME_LEN 255 |
| 131 | |
| 132 | /* 32 bytes in various csum fields */ |
| 133 | #define BTRFS_CSUM_SIZE 32 |
| 134 | |
| 135 | /* csum types */ |
| 136 | #define BTRFS_CSUM_TYPE_CRC32 0 |
| 137 | |
| 138 | static int btrfs_csum_sizes[] = { 4, 0 }; |
| 139 | |
| 140 | /* four bytes for CRC32 */ |
| 141 | #define BTRFS_EMPTY_DIR_SIZE 0 |
| 142 | |
| 143 | #define BTRFS_FT_UNKNOWN 0 |
| 144 | #define BTRFS_FT_REG_FILE 1 |
| 145 | #define BTRFS_FT_DIR 2 |
| 146 | #define BTRFS_FT_CHRDEV 3 |
| 147 | #define BTRFS_FT_BLKDEV 4 |
| 148 | #define BTRFS_FT_FIFO 5 |
| 149 | #define BTRFS_FT_SOCK 6 |
| 150 | #define BTRFS_FT_SYMLINK 7 |
| 151 | #define BTRFS_FT_XATTR 8 |
| 152 | #define BTRFS_FT_MAX 9 |
| 153 | |
| 154 | /* |
| 155 | * The key defines the order in the tree, and so it also defines (optimal) |
| 156 | * block layout. |
| 157 | * |
| 158 | * objectid corresponds to the inode number. |
| 159 | * |
| 160 | * type tells us things about the object, and is a kind of stream selector. |
| 161 | * so for a given inode, keys with type of 1 might refer to the inode data, |
| 162 | * type of 2 may point to file data in the btree and type == 3 may point to |
| 163 | * extents. |
| 164 | * |
| 165 | * offset is the starting byte offset for this key in the stream. |
| 166 | * |
| 167 | * btrfs_disk_key is in disk byte order. struct btrfs_key is always |
| 168 | * in cpu native order. Otherwise they are identical and their sizes |
| 169 | * should be the same (ie both packed) |
| 170 | */ |
| 171 | struct btrfs_disk_key { |
| 172 | __le64 objectid; |
| 173 | u8 type; |
| 174 | __le64 offset; |
| 175 | } __attribute__ ((__packed__)); |
| 176 | |
| 177 | struct btrfs_key { |
| 178 | u64 objectid; |
| 179 | u8 type; |
| 180 | u64 offset; |
| 181 | } __attribute__ ((__packed__)); |
| 182 | |
| 183 | struct btrfs_mapping_tree { |
| 184 | struct extent_map_tree map_tree; |
| 185 | }; |
| 186 | |
| 187 | #define BTRFS_UUID_SIZE 16 |
| 188 | struct btrfs_dev_item { |
| 189 | /* the internal btrfs device id */ |
| 190 | __le64 devid; |
| 191 | |
| 192 | /* size of the device */ |
| 193 | __le64 total_bytes; |
| 194 | |
| 195 | /* bytes used */ |
| 196 | __le64 bytes_used; |
| 197 | |
| 198 | /* optimal io alignment for this device */ |
| 199 | __le32 io_align; |
| 200 | |
| 201 | /* optimal io width for this device */ |
| 202 | __le32 io_width; |
| 203 | |
| 204 | /* minimal io size for this device */ |
| 205 | __le32 sector_size; |
| 206 | |
| 207 | /* type and info about this device */ |
| 208 | __le64 type; |
| 209 | |
| 210 | /* expected generation for this device */ |
| 211 | __le64 generation; |
| 212 | |
| 213 | /* |
| 214 | * starting byte of this partition on the device, |
| 215 | * to allow for stripe alignment in the future |
| 216 | */ |
| 217 | __le64 start_offset; |
| 218 | |
| 219 | /* grouping information for allocation decisions */ |
| 220 | __le32 dev_group; |
| 221 | |
| 222 | /* seek speed 0-100 where 100 is fastest */ |
| 223 | u8 seek_speed; |
| 224 | |
| 225 | /* bandwidth 0-100 where 100 is fastest */ |
| 226 | u8 bandwidth; |
| 227 | |
| 228 | /* btrfs generated uuid for this device */ |
| 229 | u8 uuid[BTRFS_UUID_SIZE]; |
| 230 | |
| 231 | /* uuid of FS who owns this device */ |
| 232 | u8 fsid[BTRFS_UUID_SIZE]; |
| 233 | } __attribute__ ((__packed__)); |
| 234 | |
| 235 | struct btrfs_stripe { |
| 236 | __le64 devid; |
| 237 | __le64 offset; |
| 238 | u8 dev_uuid[BTRFS_UUID_SIZE]; |
| 239 | } __attribute__ ((__packed__)); |
| 240 | |
| 241 | struct btrfs_chunk { |
| 242 | /* size of this chunk in bytes */ |
| 243 | __le64 length; |
| 244 | |
| 245 | /* objectid of the root referencing this chunk */ |
| 246 | __le64 owner; |
| 247 | |
| 248 | __le64 stripe_len; |
| 249 | __le64 type; |
| 250 | |
| 251 | /* optimal io alignment for this chunk */ |
| 252 | __le32 io_align; |
| 253 | |
| 254 | /* optimal io width for this chunk */ |
| 255 | __le32 io_width; |
| 256 | |
| 257 | /* minimal io size for this chunk */ |
| 258 | __le32 sector_size; |
| 259 | |
| 260 | /* 2^16 stripes is quite a lot, a second limit is the size of a single |
| 261 | * item in the btree |
| 262 | */ |
| 263 | __le16 num_stripes; |
| 264 | |
| 265 | /* sub stripes only matter for raid10 */ |
| 266 | __le16 sub_stripes; |
| 267 | struct btrfs_stripe stripe; |
| 268 | /* additional stripes go here */ |
| 269 | } __attribute__ ((__packed__)); |
| 270 | |
| 271 | #define BTRFS_FREE_SPACE_EXTENT 1 |
| 272 | #define BTRFS_FREE_SPACE_BITMAP 2 |
| 273 | |
| 274 | struct btrfs_free_space_entry { |
| 275 | __le64 offset; |
| 276 | __le64 bytes; |
| 277 | u8 type; |
| 278 | } __attribute__ ((__packed__)); |
| 279 | |
| 280 | struct btrfs_free_space_header { |
| 281 | struct btrfs_disk_key location; |
| 282 | __le64 generation; |
| 283 | __le64 num_entries; |
| 284 | __le64 num_bitmaps; |
| 285 | } __attribute__ ((__packed__)); |
| 286 | |
| 287 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| 288 | { |
| 289 | BUG_ON(num_stripes == 0); |
| 290 | return sizeof(struct btrfs_chunk) + |
| 291 | sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| 292 | } |
| 293 | |
| 294 | #define BTRFS_FSID_SIZE 16 |
| 295 | #define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0) |
| 296 | #define BTRFS_HEADER_FLAG_RELOC (1ULL << 1) |
| 297 | #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32) |
| 298 | #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33) |
| 299 | |
| 300 | #define BTRFS_BACKREF_REV_MAX 256 |
| 301 | #define BTRFS_BACKREF_REV_SHIFT 56 |
| 302 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ |
| 303 | BTRFS_BACKREF_REV_SHIFT) |
| 304 | |
| 305 | #define BTRFS_OLD_BACKREF_REV 0 |
| 306 | #define BTRFS_MIXED_BACKREF_REV 1 |
| 307 | |
| 308 | /* |
| 309 | * every tree block (leaf or node) starts with this header. |
| 310 | */ |
| 311 | struct btrfs_header { |
| 312 | /* these first four must match the super block */ |
| 313 | u8 csum[BTRFS_CSUM_SIZE]; |
| 314 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 315 | __le64 bytenr; /* which block this node is supposed to live in */ |
| 316 | __le64 flags; |
| 317 | |
| 318 | /* allowed to be different from the super from here on down */ |
| 319 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| 320 | __le64 generation; |
| 321 | __le64 owner; |
| 322 | __le32 nritems; |
| 323 | u8 level; |
| 324 | } __attribute__ ((__packed__)); |
| 325 | |
| 326 | #define BTRFS_NODEPTRS_PER_BLOCK(r) (((r)->nodesize - \ |
| 327 | sizeof(struct btrfs_header)) / \ |
| 328 | sizeof(struct btrfs_key_ptr)) |
| 329 | #define __BTRFS_LEAF_DATA_SIZE(bs) ((bs) - sizeof(struct btrfs_header)) |
| 330 | #define BTRFS_LEAF_DATA_SIZE(r) (__BTRFS_LEAF_DATA_SIZE(r->leafsize)) |
| 331 | #define BTRFS_MAX_INLINE_DATA_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 332 | sizeof(struct btrfs_item) - \ |
| 333 | sizeof(struct btrfs_file_extent_item)) |
| 334 | #define BTRFS_MAX_XATTR_SIZE(r) (BTRFS_LEAF_DATA_SIZE(r) - \ |
| 335 | sizeof(struct btrfs_item) -\ |
| 336 | sizeof(struct btrfs_dir_item)) |
| 337 | |
| 338 | |
| 339 | /* |
| 340 | * this is a very generous portion of the super block, giving us |
| 341 | * room to translate 14 chunks with 3 stripes each. |
| 342 | */ |
| 343 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
| 344 | #define BTRFS_LABEL_SIZE 256 |
| 345 | |
| 346 | /* |
| 347 | * the super block basically lists the main trees of the FS |
| 348 | * it currently lacks any block count etc etc |
| 349 | */ |
| 350 | struct btrfs_super_block { |
| 351 | u8 csum[BTRFS_CSUM_SIZE]; |
| 352 | /* the first 4 fields must match struct btrfs_header */ |
| 353 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 354 | __le64 bytenr; /* this block number */ |
| 355 | __le64 flags; |
| 356 | |
| 357 | /* allowed to be different from the btrfs_header from here own down */ |
| 358 | __le64 magic; |
| 359 | __le64 generation; |
| 360 | __le64 root; |
| 361 | __le64 chunk_root; |
| 362 | __le64 log_root; |
| 363 | |
| 364 | /* this will help find the new super based on the log root */ |
| 365 | __le64 log_root_transid; |
| 366 | __le64 total_bytes; |
| 367 | __le64 bytes_used; |
| 368 | __le64 root_dir_objectid; |
| 369 | __le64 num_devices; |
| 370 | __le32 sectorsize; |
| 371 | __le32 nodesize; |
| 372 | __le32 leafsize; |
| 373 | __le32 stripesize; |
| 374 | __le32 sys_chunk_array_size; |
| 375 | __le64 chunk_root_generation; |
| 376 | __le64 compat_flags; |
| 377 | __le64 compat_ro_flags; |
| 378 | __le64 incompat_flags; |
| 379 | __le16 csum_type; |
| 380 | u8 root_level; |
| 381 | u8 chunk_root_level; |
| 382 | u8 log_root_level; |
| 383 | struct btrfs_dev_item dev_item; |
| 384 | |
| 385 | char label[BTRFS_LABEL_SIZE]; |
| 386 | |
| 387 | __le64 cache_generation; |
| 388 | |
| 389 | /* future expansion */ |
| 390 | __le64 reserved[31]; |
| 391 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
| 392 | } __attribute__ ((__packed__)); |
| 393 | |
| 394 | /* |
| 395 | * Compat flags that we support. If any incompat flags are set other than the |
| 396 | * ones specified below then we will fail to mount |
| 397 | */ |
| 398 | #define BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF (1ULL << 0) |
| 399 | #define BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL (1ULL << 1) |
| 400 | #define BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS (1ULL << 2) |
| 401 | |
| 402 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
| 403 | #define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL |
| 404 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
| 405 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ |
| 406 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
| 407 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) |
| 408 | |
| 409 | /* |
| 410 | * A leaf is full of items. offset and size tell us where to find |
| 411 | * the item in the leaf (relative to the start of the data area) |
| 412 | */ |
| 413 | struct btrfs_item { |
| 414 | struct btrfs_disk_key key; |
| 415 | __le32 offset; |
| 416 | __le32 size; |
| 417 | } __attribute__ ((__packed__)); |
| 418 | |
| 419 | /* |
| 420 | * leaves have an item area and a data area: |
| 421 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 422 | * |
| 423 | * The data is separate from the items to get the keys closer together |
| 424 | * during searches. |
| 425 | */ |
| 426 | struct btrfs_leaf { |
| 427 | struct btrfs_header header; |
| 428 | struct btrfs_item items[]; |
| 429 | } __attribute__ ((__packed__)); |
| 430 | |
| 431 | /* |
| 432 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 433 | * other blocks |
| 434 | */ |
| 435 | struct btrfs_key_ptr { |
| 436 | struct btrfs_disk_key key; |
| 437 | __le64 blockptr; |
| 438 | __le64 generation; |
| 439 | } __attribute__ ((__packed__)); |
| 440 | |
| 441 | struct btrfs_node { |
| 442 | struct btrfs_header header; |
| 443 | struct btrfs_key_ptr ptrs[]; |
| 444 | } __attribute__ ((__packed__)); |
| 445 | |
| 446 | /* |
| 447 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 448 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point |
| 449 | * to any other levels that are present. |
| 450 | * |
| 451 | * The slots array records the index of the item or block pointer |
| 452 | * used while walking the tree. |
| 453 | */ |
| 454 | struct btrfs_path { |
| 455 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
| 456 | int slots[BTRFS_MAX_LEVEL]; |
| 457 | /* if there is real range locking, this locks field will change */ |
| 458 | int locks[BTRFS_MAX_LEVEL]; |
| 459 | int reada; |
| 460 | /* keep some upper locks as we walk down */ |
| 461 | int lowest_level; |
| 462 | |
| 463 | /* |
| 464 | * set by btrfs_split_item, tells search_slot to keep all locks |
| 465 | * and to force calls to keep space in the nodes |
| 466 | */ |
| 467 | unsigned int search_for_split:1; |
| 468 | unsigned int keep_locks:1; |
| 469 | unsigned int skip_locking:1; |
| 470 | unsigned int leave_spinning:1; |
| 471 | unsigned int search_commit_root:1; |
| 472 | }; |
| 473 | |
| 474 | /* |
| 475 | * items in the extent btree are used to record the objectid of the |
| 476 | * owner of the block and the number of references |
| 477 | */ |
| 478 | |
| 479 | struct btrfs_extent_item { |
| 480 | __le64 refs; |
| 481 | __le64 generation; |
| 482 | __le64 flags; |
| 483 | } __attribute__ ((__packed__)); |
| 484 | |
| 485 | struct btrfs_extent_item_v0 { |
| 486 | __le32 refs; |
| 487 | } __attribute__ ((__packed__)); |
| 488 | |
| 489 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r) >> 4) - \ |
| 490 | sizeof(struct btrfs_item)) |
| 491 | |
| 492 | #define BTRFS_EXTENT_FLAG_DATA (1ULL << 0) |
| 493 | #define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1) |
| 494 | |
| 495 | /* following flags only apply to tree blocks */ |
| 496 | |
| 497 | /* use full backrefs for extent pointers in the block */ |
| 498 | #define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8) |
| 499 | |
| 500 | struct btrfs_tree_block_info { |
| 501 | struct btrfs_disk_key key; |
| 502 | u8 level; |
| 503 | } __attribute__ ((__packed__)); |
| 504 | |
| 505 | struct btrfs_extent_data_ref { |
| 506 | __le64 root; |
| 507 | __le64 objectid; |
| 508 | __le64 offset; |
| 509 | __le32 count; |
| 510 | } __attribute__ ((__packed__)); |
| 511 | |
| 512 | struct btrfs_shared_data_ref { |
| 513 | __le32 count; |
| 514 | } __attribute__ ((__packed__)); |
| 515 | |
| 516 | struct btrfs_extent_inline_ref { |
| 517 | u8 type; |
| 518 | __le64 offset; |
| 519 | } __attribute__ ((__packed__)); |
| 520 | |
| 521 | /* old style backrefs item */ |
| 522 | struct btrfs_extent_ref_v0 { |
| 523 | __le64 root; |
| 524 | __le64 generation; |
| 525 | __le64 objectid; |
| 526 | __le32 count; |
| 527 | } __attribute__ ((__packed__)); |
| 528 | |
| 529 | |
| 530 | /* dev extents record free space on individual devices. The owner |
| 531 | * field points back to the chunk allocation mapping tree that allocated |
| 532 | * the extent. The chunk tree uuid field is a way to double check the owner |
| 533 | */ |
| 534 | struct btrfs_dev_extent { |
| 535 | __le64 chunk_tree; |
| 536 | __le64 chunk_objectid; |
| 537 | __le64 chunk_offset; |
| 538 | __le64 length; |
| 539 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| 540 | } __attribute__ ((__packed__)); |
| 541 | |
| 542 | struct btrfs_inode_ref { |
| 543 | __le64 index; |
| 544 | __le16 name_len; |
| 545 | /* name goes here */ |
| 546 | } __attribute__ ((__packed__)); |
| 547 | |
| 548 | struct btrfs_timespec { |
| 549 | __le64 sec; |
| 550 | __le32 nsec; |
| 551 | } __attribute__ ((__packed__)); |
| 552 | |
| 553 | enum btrfs_compression_type { |
| 554 | BTRFS_COMPRESS_NONE = 0, |
| 555 | BTRFS_COMPRESS_ZLIB = 1, |
| 556 | BTRFS_COMPRESS_LAST = 2, |
| 557 | }; |
| 558 | |
| 559 | struct btrfs_inode_item { |
| 560 | /* nfs style generation number */ |
| 561 | __le64 generation; |
| 562 | /* transid that last touched this inode */ |
| 563 | __le64 transid; |
| 564 | __le64 size; |
| 565 | __le64 nbytes; |
| 566 | __le64 block_group; |
| 567 | __le32 nlink; |
| 568 | __le32 uid; |
| 569 | __le32 gid; |
| 570 | __le32 mode; |
| 571 | __le64 rdev; |
| 572 | __le64 flags; |
| 573 | |
| 574 | /* modification sequence number for NFS */ |
| 575 | __le64 sequence; |
| 576 | |
| 577 | /* |
| 578 | * a little future expansion, for more than this we can |
| 579 | * just grow the inode item and version it |
| 580 | */ |
| 581 | __le64 reserved[4]; |
| 582 | struct btrfs_timespec atime; |
| 583 | struct btrfs_timespec ctime; |
| 584 | struct btrfs_timespec mtime; |
| 585 | struct btrfs_timespec otime; |
| 586 | } __attribute__ ((__packed__)); |
| 587 | |
| 588 | struct btrfs_dir_log_item { |
| 589 | __le64 end; |
| 590 | } __attribute__ ((__packed__)); |
| 591 | |
| 592 | struct btrfs_dir_item { |
| 593 | struct btrfs_disk_key location; |
| 594 | __le64 transid; |
| 595 | __le16 data_len; |
| 596 | __le16 name_len; |
| 597 | u8 type; |
| 598 | } __attribute__ ((__packed__)); |
| 599 | |
| 600 | struct btrfs_root_item { |
| 601 | struct btrfs_inode_item inode; |
| 602 | __le64 generation; |
| 603 | __le64 root_dirid; |
| 604 | __le64 bytenr; |
| 605 | __le64 byte_limit; |
| 606 | __le64 bytes_used; |
| 607 | __le64 last_snapshot; |
| 608 | __le64 flags; |
| 609 | __le32 refs; |
| 610 | struct btrfs_disk_key drop_progress; |
| 611 | u8 drop_level; |
| 612 | u8 level; |
| 613 | } __attribute__ ((__packed__)); |
| 614 | |
| 615 | /* |
| 616 | * this is used for both forward and backward root refs |
| 617 | */ |
| 618 | struct btrfs_root_ref { |
| 619 | __le64 dirid; |
| 620 | __le64 sequence; |
| 621 | __le16 name_len; |
| 622 | } __attribute__ ((__packed__)); |
| 623 | |
| 624 | #define BTRFS_FILE_EXTENT_INLINE 0 |
| 625 | #define BTRFS_FILE_EXTENT_REG 1 |
| 626 | #define BTRFS_FILE_EXTENT_PREALLOC 2 |
| 627 | |
| 628 | struct btrfs_file_extent_item { |
| 629 | /* |
| 630 | * transaction id that created this extent |
| 631 | */ |
| 632 | __le64 generation; |
| 633 | /* |
| 634 | * max number of bytes to hold this extent in ram |
| 635 | * when we split a compressed extent we can't know how big |
| 636 | * each of the resulting pieces will be. So, this is |
| 637 | * an upper limit on the size of the extent in ram instead of |
| 638 | * an exact limit. |
| 639 | */ |
| 640 | __le64 ram_bytes; |
| 641 | |
| 642 | /* |
| 643 | * 32 bits for the various ways we might encode the data, |
| 644 | * including compression and encryption. If any of these |
| 645 | * are set to something a given disk format doesn't understand |
| 646 | * it is treated like an incompat flag for reading and writing, |
| 647 | * but not for stat. |
| 648 | */ |
| 649 | u8 compression; |
| 650 | u8 encryption; |
| 651 | __le16 other_encoding; /* spare for later use */ |
| 652 | |
| 653 | /* are we inline data or a real extent? */ |
| 654 | u8 type; |
| 655 | |
| 656 | /* |
| 657 | * disk space consumed by the extent, checksum blocks are included |
| 658 | * in these numbers |
| 659 | */ |
| 660 | __le64 disk_bytenr; |
| 661 | __le64 disk_num_bytes; |
| 662 | /* |
| 663 | * the logical offset in file blocks (no csums) |
| 664 | * this extent record is for. This allows a file extent to point |
| 665 | * into the middle of an existing extent on disk, sharing it |
| 666 | * between two snapshots (useful if some bytes in the middle of the |
| 667 | * extent have changed |
| 668 | */ |
| 669 | __le64 offset; |
| 670 | /* |
| 671 | * the logical number of file blocks (no csums included). This |
| 672 | * always reflects the size uncompressed and without encoding. |
| 673 | */ |
| 674 | __le64 num_bytes; |
| 675 | |
| 676 | } __attribute__ ((__packed__)); |
| 677 | |
| 678 | struct btrfs_csum_item { |
| 679 | u8 csum; |
| 680 | } __attribute__ ((__packed__)); |
| 681 | |
| 682 | /* different types of block groups (and chunks) */ |
| 683 | #define BTRFS_BLOCK_GROUP_DATA (1 << 0) |
| 684 | #define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1) |
| 685 | #define BTRFS_BLOCK_GROUP_METADATA (1 << 2) |
| 686 | #define BTRFS_BLOCK_GROUP_RAID0 (1 << 3) |
| 687 | #define BTRFS_BLOCK_GROUP_RAID1 (1 << 4) |
| 688 | #define BTRFS_BLOCK_GROUP_DUP (1 << 5) |
| 689 | #define BTRFS_BLOCK_GROUP_RAID10 (1 << 6) |
| 690 | #define BTRFS_NR_RAID_TYPES 5 |
| 691 | |
| 692 | struct btrfs_block_group_item { |
| 693 | __le64 used; |
| 694 | __le64 chunk_objectid; |
| 695 | __le64 flags; |
| 696 | } __attribute__ ((__packed__)); |
| 697 | |
| 698 | struct btrfs_space_info { |
| 699 | u64 flags; |
| 700 | |
| 701 | u64 total_bytes; /* total bytes in the space, |
| 702 | this doesn't take mirrors into account */ |
| 703 | u64 bytes_used; /* total bytes used, |
| 704 | this does't take mirrors into account */ |
| 705 | u64 bytes_pinned; /* total bytes pinned, will be freed when the |
| 706 | transaction finishes */ |
| 707 | u64 bytes_reserved; /* total bytes the allocator has reserved for |
| 708 | current allocations */ |
| 709 | u64 bytes_readonly; /* total bytes that are read only */ |
| 710 | |
| 711 | u64 bytes_may_use; /* number of bytes that may be used for |
| 712 | delalloc/allocations */ |
| 713 | u64 disk_used; /* total bytes used on disk */ |
| 714 | u64 disk_total; /* total bytes on disk, takes mirrors into |
| 715 | account */ |
| 716 | |
| 717 | int full; /* indicates that we cannot allocate any more |
| 718 | chunks for this space */ |
| 719 | int force_alloc; /* set if we need to force a chunk alloc for |
| 720 | this space */ |
| 721 | |
| 722 | struct list_head list; |
| 723 | |
| 724 | /* for block groups in our same type */ |
| 725 | struct list_head block_groups[BTRFS_NR_RAID_TYPES]; |
| 726 | spinlock_t lock; |
| 727 | struct rw_semaphore groups_sem; |
| 728 | atomic_t caching_threads; |
| 729 | }; |
| 730 | |
| 731 | struct btrfs_block_rsv { |
| 732 | u64 size; |
| 733 | u64 reserved; |
| 734 | u64 freed[2]; |
| 735 | struct btrfs_space_info *space_info; |
| 736 | struct list_head list; |
| 737 | spinlock_t lock; |
| 738 | atomic_t usage; |
| 739 | unsigned int priority:8; |
| 740 | unsigned int durable:1; |
| 741 | unsigned int refill_used:1; |
| 742 | unsigned int full:1; |
| 743 | }; |
| 744 | |
| 745 | /* |
| 746 | * free clusters are used to claim free space in relatively large chunks, |
| 747 | * allowing us to do less seeky writes. They are used for all metadata |
| 748 | * allocations and data allocations in ssd mode. |
| 749 | */ |
| 750 | struct btrfs_free_cluster { |
| 751 | spinlock_t lock; |
| 752 | spinlock_t refill_lock; |
| 753 | struct rb_root root; |
| 754 | |
| 755 | /* largest extent in this cluster */ |
| 756 | u64 max_size; |
| 757 | |
| 758 | /* first extent starting offset */ |
| 759 | u64 window_start; |
| 760 | |
| 761 | /* if this cluster simply points at a bitmap in the block group */ |
| 762 | bool points_to_bitmap; |
| 763 | |
| 764 | struct btrfs_block_group_cache *block_group; |
| 765 | /* |
| 766 | * when a cluster is allocated from a block group, we put the |
| 767 | * cluster onto a list in the block group so that it can |
| 768 | * be freed before the block group is freed. |
| 769 | */ |
| 770 | struct list_head block_group_list; |
| 771 | }; |
| 772 | |
| 773 | enum btrfs_caching_type { |
| 774 | BTRFS_CACHE_NO = 0, |
| 775 | BTRFS_CACHE_STARTED = 1, |
| 776 | BTRFS_CACHE_FINISHED = 2, |
| 777 | }; |
| 778 | |
| 779 | enum btrfs_disk_cache_state { |
| 780 | BTRFS_DC_WRITTEN = 0, |
| 781 | BTRFS_DC_ERROR = 1, |
| 782 | BTRFS_DC_CLEAR = 2, |
| 783 | BTRFS_DC_SETUP = 3, |
| 784 | BTRFS_DC_NEED_WRITE = 4, |
| 785 | }; |
| 786 | |
| 787 | struct btrfs_caching_control { |
| 788 | struct list_head list; |
| 789 | struct mutex mutex; |
| 790 | wait_queue_head_t wait; |
| 791 | struct btrfs_block_group_cache *block_group; |
| 792 | u64 progress; |
| 793 | atomic_t count; |
| 794 | }; |
| 795 | |
| 796 | struct btrfs_block_group_cache { |
| 797 | struct btrfs_key key; |
| 798 | struct btrfs_block_group_item item; |
| 799 | struct btrfs_fs_info *fs_info; |
| 800 | struct inode *inode; |
| 801 | spinlock_t lock; |
| 802 | u64 pinned; |
| 803 | u64 reserved; |
| 804 | u64 reserved_pinned; |
| 805 | u64 bytes_super; |
| 806 | u64 flags; |
| 807 | u64 sectorsize; |
| 808 | int extents_thresh; |
| 809 | int free_extents; |
| 810 | int total_bitmaps; |
| 811 | int ro:1; |
| 812 | int dirty:1; |
| 813 | int iref:1; |
| 814 | |
| 815 | int disk_cache_state; |
| 816 | |
| 817 | /* cache tracking stuff */ |
| 818 | int cached; |
| 819 | struct btrfs_caching_control *caching_ctl; |
| 820 | u64 last_byte_to_unpin; |
| 821 | |
| 822 | struct btrfs_space_info *space_info; |
| 823 | |
| 824 | /* free space cache stuff */ |
| 825 | spinlock_t tree_lock; |
| 826 | struct rb_root free_space_offset; |
| 827 | u64 free_space; |
| 828 | |
| 829 | /* block group cache stuff */ |
| 830 | struct rb_node cache_node; |
| 831 | |
| 832 | /* for block groups in the same raid type */ |
| 833 | struct list_head list; |
| 834 | |
| 835 | /* usage count */ |
| 836 | atomic_t count; |
| 837 | |
| 838 | /* List of struct btrfs_free_clusters for this block group. |
| 839 | * Today it will only have one thing on it, but that may change |
| 840 | */ |
| 841 | struct list_head cluster_list; |
| 842 | }; |
| 843 | |
| 844 | struct reloc_control; |
| 845 | struct btrfs_device; |
| 846 | struct btrfs_fs_devices; |
| 847 | struct btrfs_fs_info { |
| 848 | u8 fsid[BTRFS_FSID_SIZE]; |
| 849 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| 850 | struct btrfs_root *extent_root; |
| 851 | struct btrfs_root *tree_root; |
| 852 | struct btrfs_root *chunk_root; |
| 853 | struct btrfs_root *dev_root; |
| 854 | struct btrfs_root *fs_root; |
| 855 | struct btrfs_root *csum_root; |
| 856 | |
| 857 | /* the log root tree is a directory of all the other log roots */ |
| 858 | struct btrfs_root *log_root_tree; |
| 859 | |
| 860 | spinlock_t fs_roots_radix_lock; |
| 861 | struct radix_tree_root fs_roots_radix; |
| 862 | |
| 863 | /* block group cache stuff */ |
| 864 | spinlock_t block_group_cache_lock; |
| 865 | struct rb_root block_group_cache_tree; |
| 866 | |
| 867 | struct extent_io_tree freed_extents[2]; |
| 868 | struct extent_io_tree *pinned_extents; |
| 869 | |
| 870 | /* logical->physical extent mapping */ |
| 871 | struct btrfs_mapping_tree mapping_tree; |
| 872 | |
| 873 | /* block reservation for extent, checksum and root tree */ |
| 874 | struct btrfs_block_rsv global_block_rsv; |
| 875 | /* block reservation for delay allocation */ |
| 876 | struct btrfs_block_rsv delalloc_block_rsv; |
| 877 | /* block reservation for metadata operations */ |
| 878 | struct btrfs_block_rsv trans_block_rsv; |
| 879 | /* block reservation for chunk tree */ |
| 880 | struct btrfs_block_rsv chunk_block_rsv; |
| 881 | |
| 882 | struct btrfs_block_rsv empty_block_rsv; |
| 883 | |
| 884 | /* list of block reservations that cross multiple transactions */ |
| 885 | struct list_head durable_block_rsv_list; |
| 886 | |
| 887 | struct mutex durable_block_rsv_mutex; |
| 888 | |
| 889 | u64 generation; |
| 890 | u64 last_trans_committed; |
| 891 | |
| 892 | /* |
| 893 | * this is updated to the current trans every time a full commit |
| 894 | * is required instead of the faster short fsync log commits |
| 895 | */ |
| 896 | u64 last_trans_log_full_commit; |
| 897 | u64 open_ioctl_trans; |
| 898 | unsigned long mount_opt; |
| 899 | u64 max_inline; |
| 900 | u64 alloc_start; |
| 901 | struct btrfs_transaction *running_transaction; |
| 902 | wait_queue_head_t transaction_throttle; |
| 903 | wait_queue_head_t transaction_wait; |
| 904 | wait_queue_head_t transaction_blocked_wait; |
| 905 | wait_queue_head_t async_submit_wait; |
| 906 | |
| 907 | struct btrfs_super_block super_copy; |
| 908 | struct btrfs_super_block super_for_commit; |
| 909 | struct block_device *__bdev; |
| 910 | struct super_block *sb; |
| 911 | struct inode *btree_inode; |
| 912 | struct backing_dev_info bdi; |
| 913 | struct mutex trans_mutex; |
| 914 | struct mutex tree_log_mutex; |
| 915 | struct mutex transaction_kthread_mutex; |
| 916 | struct mutex cleaner_mutex; |
| 917 | struct mutex chunk_mutex; |
| 918 | struct mutex volume_mutex; |
| 919 | /* |
| 920 | * this protects the ordered operations list only while we are |
| 921 | * processing all of the entries on it. This way we make |
| 922 | * sure the commit code doesn't find the list temporarily empty |
| 923 | * because another function happens to be doing non-waiting preflush |
| 924 | * before jumping into the main commit. |
| 925 | */ |
| 926 | struct mutex ordered_operations_mutex; |
| 927 | struct rw_semaphore extent_commit_sem; |
| 928 | |
| 929 | struct rw_semaphore cleanup_work_sem; |
| 930 | |
| 931 | struct rw_semaphore subvol_sem; |
| 932 | struct srcu_struct subvol_srcu; |
| 933 | |
| 934 | struct list_head trans_list; |
| 935 | struct list_head hashers; |
| 936 | struct list_head dead_roots; |
| 937 | struct list_head caching_block_groups; |
| 938 | |
| 939 | spinlock_t delayed_iput_lock; |
| 940 | struct list_head delayed_iputs; |
| 941 | |
| 942 | atomic_t nr_async_submits; |
| 943 | atomic_t async_submit_draining; |
| 944 | atomic_t nr_async_bios; |
| 945 | atomic_t async_delalloc_pages; |
| 946 | |
| 947 | /* |
| 948 | * this is used by the balancing code to wait for all the pending |
| 949 | * ordered extents |
| 950 | */ |
| 951 | spinlock_t ordered_extent_lock; |
| 952 | |
| 953 | /* |
| 954 | * all of the data=ordered extents pending writeback |
| 955 | * these can span multiple transactions and basically include |
| 956 | * every dirty data page that isn't from nodatacow |
| 957 | */ |
| 958 | struct list_head ordered_extents; |
| 959 | |
| 960 | /* |
| 961 | * all of the inodes that have delalloc bytes. It is possible for |
| 962 | * this list to be empty even when there is still dirty data=ordered |
| 963 | * extents waiting to finish IO. |
| 964 | */ |
| 965 | struct list_head delalloc_inodes; |
| 966 | |
| 967 | /* |
| 968 | * special rename and truncate targets that must be on disk before |
| 969 | * we're allowed to commit. This is basically the ext3 style |
| 970 | * data=ordered list. |
| 971 | */ |
| 972 | struct list_head ordered_operations; |
| 973 | |
| 974 | /* |
| 975 | * there is a pool of worker threads for checksumming during writes |
| 976 | * and a pool for checksumming after reads. This is because readers |
| 977 | * can run with FS locks held, and the writers may be waiting for |
| 978 | * those locks. We don't want ordering in the pending list to cause |
| 979 | * deadlocks, and so the two are serviced separately. |
| 980 | * |
| 981 | * A third pool does submit_bio to avoid deadlocking with the other |
| 982 | * two |
| 983 | */ |
| 984 | struct btrfs_workers generic_worker; |
| 985 | struct btrfs_workers workers; |
| 986 | struct btrfs_workers delalloc_workers; |
| 987 | struct btrfs_workers endio_workers; |
| 988 | struct btrfs_workers endio_meta_workers; |
| 989 | struct btrfs_workers endio_meta_write_workers; |
| 990 | struct btrfs_workers endio_write_workers; |
| 991 | struct btrfs_workers endio_freespace_worker; |
| 992 | struct btrfs_workers submit_workers; |
| 993 | /* |
| 994 | * fixup workers take dirty pages that didn't properly go through |
| 995 | * the cow mechanism and make them safe to write. It happens |
| 996 | * for the sys_munmap function call path |
| 997 | */ |
| 998 | struct btrfs_workers fixup_workers; |
| 999 | struct task_struct *transaction_kthread; |
| 1000 | struct task_struct *cleaner_kthread; |
| 1001 | int thread_pool_size; |
| 1002 | |
| 1003 | struct kobject super_kobj; |
| 1004 | struct completion kobj_unregister; |
| 1005 | int do_barriers; |
| 1006 | int closing; |
| 1007 | int log_root_recovering; |
| 1008 | int enospc_unlink; |
| 1009 | |
| 1010 | u64 total_pinned; |
| 1011 | |
| 1012 | /* protected by the delalloc lock, used to keep from writing |
| 1013 | * metadata until there is a nice batch |
| 1014 | */ |
| 1015 | u64 dirty_metadata_bytes; |
| 1016 | struct list_head dirty_cowonly_roots; |
| 1017 | |
| 1018 | struct btrfs_fs_devices *fs_devices; |
| 1019 | |
| 1020 | /* |
| 1021 | * the space_info list is almost entirely read only. It only changes |
| 1022 | * when we add a new raid type to the FS, and that happens |
| 1023 | * very rarely. RCU is used to protect it. |
| 1024 | */ |
| 1025 | struct list_head space_info; |
| 1026 | |
| 1027 | struct reloc_control *reloc_ctl; |
| 1028 | |
| 1029 | spinlock_t delalloc_lock; |
| 1030 | spinlock_t new_trans_lock; |
| 1031 | u64 delalloc_bytes; |
| 1032 | |
| 1033 | /* data_alloc_cluster is only used in ssd mode */ |
| 1034 | struct btrfs_free_cluster data_alloc_cluster; |
| 1035 | |
| 1036 | /* all metadata allocations go through this cluster */ |
| 1037 | struct btrfs_free_cluster meta_alloc_cluster; |
| 1038 | |
| 1039 | spinlock_t ref_cache_lock; |
| 1040 | u64 total_ref_cache_size; |
| 1041 | |
| 1042 | u64 avail_data_alloc_bits; |
| 1043 | u64 avail_metadata_alloc_bits; |
| 1044 | u64 avail_system_alloc_bits; |
| 1045 | u64 data_alloc_profile; |
| 1046 | u64 metadata_alloc_profile; |
| 1047 | u64 system_alloc_profile; |
| 1048 | |
| 1049 | unsigned data_chunk_allocations; |
| 1050 | unsigned metadata_ratio; |
| 1051 | |
| 1052 | void *bdev_holder; |
| 1053 | }; |
| 1054 | |
| 1055 | /* |
| 1056 | * in ram representation of the tree. extent_root is used for all allocations |
| 1057 | * and for the extent tree extent_root root. |
| 1058 | */ |
| 1059 | struct btrfs_root { |
| 1060 | struct extent_buffer *node; |
| 1061 | |
| 1062 | /* the node lock is held while changing the node pointer */ |
| 1063 | spinlock_t node_lock; |
| 1064 | |
| 1065 | struct extent_buffer *commit_root; |
| 1066 | struct btrfs_root *log_root; |
| 1067 | struct btrfs_root *reloc_root; |
| 1068 | |
| 1069 | struct btrfs_root_item root_item; |
| 1070 | struct btrfs_key root_key; |
| 1071 | struct btrfs_fs_info *fs_info; |
| 1072 | struct extent_io_tree dirty_log_pages; |
| 1073 | |
| 1074 | struct kobject root_kobj; |
| 1075 | struct completion kobj_unregister; |
| 1076 | struct mutex objectid_mutex; |
| 1077 | |
| 1078 | spinlock_t accounting_lock; |
| 1079 | struct btrfs_block_rsv *block_rsv; |
| 1080 | |
| 1081 | struct mutex log_mutex; |
| 1082 | wait_queue_head_t log_writer_wait; |
| 1083 | wait_queue_head_t log_commit_wait[2]; |
| 1084 | atomic_t log_writers; |
| 1085 | atomic_t log_commit[2]; |
| 1086 | unsigned long log_transid; |
| 1087 | unsigned long last_log_commit; |
| 1088 | unsigned long log_batch; |
| 1089 | pid_t log_start_pid; |
| 1090 | bool log_multiple_pids; |
| 1091 | |
| 1092 | u64 objectid; |
| 1093 | u64 last_trans; |
| 1094 | |
| 1095 | /* data allocations are done in sectorsize units */ |
| 1096 | u32 sectorsize; |
| 1097 | |
| 1098 | /* node allocations are done in nodesize units */ |
| 1099 | u32 nodesize; |
| 1100 | |
| 1101 | /* leaf allocations are done in leafsize units */ |
| 1102 | u32 leafsize; |
| 1103 | |
| 1104 | u32 stripesize; |
| 1105 | |
| 1106 | u32 type; |
| 1107 | |
| 1108 | u64 highest_objectid; |
| 1109 | int ref_cows; |
| 1110 | int track_dirty; |
| 1111 | int in_radix; |
| 1112 | |
| 1113 | u64 defrag_trans_start; |
| 1114 | struct btrfs_key defrag_progress; |
| 1115 | struct btrfs_key defrag_max; |
| 1116 | int defrag_running; |
| 1117 | char *name; |
| 1118 | int in_sysfs; |
| 1119 | |
| 1120 | /* the dirty list is only used by non-reference counted roots */ |
| 1121 | struct list_head dirty_list; |
| 1122 | |
| 1123 | struct list_head root_list; |
| 1124 | |
| 1125 | spinlock_t orphan_lock; |
| 1126 | struct list_head orphan_list; |
| 1127 | struct btrfs_block_rsv *orphan_block_rsv; |
| 1128 | int orphan_item_inserted; |
| 1129 | int orphan_cleanup_state; |
| 1130 | |
| 1131 | spinlock_t inode_lock; |
| 1132 | /* red-black tree that keeps track of in-memory inodes */ |
| 1133 | struct rb_root inode_tree; |
| 1134 | |
| 1135 | /* |
| 1136 | * right now this just gets used so that a root has its own devid |
| 1137 | * for stat. It may be used for more later |
| 1138 | */ |
| 1139 | struct super_block anon_super; |
| 1140 | }; |
| 1141 | |
| 1142 | /* |
| 1143 | * inode items have the data typically returned from stat and store other |
| 1144 | * info about object characteristics. There is one for every file and dir in |
| 1145 | * the FS |
| 1146 | */ |
| 1147 | #define BTRFS_INODE_ITEM_KEY 1 |
| 1148 | #define BTRFS_INODE_REF_KEY 12 |
| 1149 | #define BTRFS_XATTR_ITEM_KEY 24 |
| 1150 | #define BTRFS_ORPHAN_ITEM_KEY 48 |
| 1151 | /* reserve 2-15 close to the inode for later flexibility */ |
| 1152 | |
| 1153 | /* |
| 1154 | * dir items are the name -> inode pointers in a directory. There is one |
| 1155 | * for every name in a directory. |
| 1156 | */ |
| 1157 | #define BTRFS_DIR_LOG_ITEM_KEY 60 |
| 1158 | #define BTRFS_DIR_LOG_INDEX_KEY 72 |
| 1159 | #define BTRFS_DIR_ITEM_KEY 84 |
| 1160 | #define BTRFS_DIR_INDEX_KEY 96 |
| 1161 | /* |
| 1162 | * extent data is for file data |
| 1163 | */ |
| 1164 | #define BTRFS_EXTENT_DATA_KEY 108 |
| 1165 | |
| 1166 | /* |
| 1167 | * extent csums are stored in a separate tree and hold csums for |
| 1168 | * an entire extent on disk. |
| 1169 | */ |
| 1170 | #define BTRFS_EXTENT_CSUM_KEY 128 |
| 1171 | |
| 1172 | /* |
| 1173 | * root items point to tree roots. They are typically in the root |
| 1174 | * tree used by the super block to find all the other trees |
| 1175 | */ |
| 1176 | #define BTRFS_ROOT_ITEM_KEY 132 |
| 1177 | |
| 1178 | /* |
| 1179 | * root backrefs tie subvols and snapshots to the directory entries that |
| 1180 | * reference them |
| 1181 | */ |
| 1182 | #define BTRFS_ROOT_BACKREF_KEY 144 |
| 1183 | |
| 1184 | /* |
| 1185 | * root refs make a fast index for listing all of the snapshots and |
| 1186 | * subvolumes referenced by a given root. They point directly to the |
| 1187 | * directory item in the root that references the subvol |
| 1188 | */ |
| 1189 | #define BTRFS_ROOT_REF_KEY 156 |
| 1190 | |
| 1191 | /* |
| 1192 | * extent items are in the extent map tree. These record which blocks |
| 1193 | * are used, and how many references there are to each block |
| 1194 | */ |
| 1195 | #define BTRFS_EXTENT_ITEM_KEY 168 |
| 1196 | |
| 1197 | #define BTRFS_TREE_BLOCK_REF_KEY 176 |
| 1198 | |
| 1199 | #define BTRFS_EXTENT_DATA_REF_KEY 178 |
| 1200 | |
| 1201 | #define BTRFS_EXTENT_REF_V0_KEY 180 |
| 1202 | |
| 1203 | #define BTRFS_SHARED_BLOCK_REF_KEY 182 |
| 1204 | |
| 1205 | #define BTRFS_SHARED_DATA_REF_KEY 184 |
| 1206 | |
| 1207 | /* |
| 1208 | * block groups give us hints into the extent allocation trees. Which |
| 1209 | * blocks are free etc etc |
| 1210 | */ |
| 1211 | #define BTRFS_BLOCK_GROUP_ITEM_KEY 192 |
| 1212 | |
| 1213 | #define BTRFS_DEV_EXTENT_KEY 204 |
| 1214 | #define BTRFS_DEV_ITEM_KEY 216 |
| 1215 | #define BTRFS_CHUNK_ITEM_KEY 228 |
| 1216 | |
| 1217 | /* |
| 1218 | * string items are for debugging. They just store a short string of |
| 1219 | * data in the FS |
| 1220 | */ |
| 1221 | #define BTRFS_STRING_ITEM_KEY 253 |
| 1222 | |
| 1223 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| 1224 | #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| 1225 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
| 1226 | #define BTRFS_MOUNT_SSD (1 << 3) |
| 1227 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
| 1228 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
| 1229 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
| 1230 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
| 1231 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
| 1232 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
| 1233 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
| 1234 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
| 1235 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
| 1236 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
| 1237 | |
| 1238 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| 1239 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| 1240 | #define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \ |
| 1241 | BTRFS_MOUNT_##opt) |
| 1242 | /* |
| 1243 | * Inode flags |
| 1244 | */ |
| 1245 | #define BTRFS_INODE_NODATASUM (1 << 0) |
| 1246 | #define BTRFS_INODE_NODATACOW (1 << 1) |
| 1247 | #define BTRFS_INODE_READONLY (1 << 2) |
| 1248 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
| 1249 | #define BTRFS_INODE_PREALLOC (1 << 4) |
| 1250 | #define BTRFS_INODE_SYNC (1 << 5) |
| 1251 | #define BTRFS_INODE_IMMUTABLE (1 << 6) |
| 1252 | #define BTRFS_INODE_APPEND (1 << 7) |
| 1253 | #define BTRFS_INODE_NODUMP (1 << 8) |
| 1254 | #define BTRFS_INODE_NOATIME (1 << 9) |
| 1255 | #define BTRFS_INODE_DIRSYNC (1 << 10) |
| 1256 | |
| 1257 | /* some macros to generate set/get funcs for the struct fields. This |
| 1258 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| 1259 | * one for u8: |
| 1260 | */ |
| 1261 | #define le8_to_cpu(v) (v) |
| 1262 | #define cpu_to_le8(v) (v) |
| 1263 | #define __le8 u8 |
| 1264 | |
| 1265 | #define read_eb_member(eb, ptr, type, member, result) ( \ |
| 1266 | read_extent_buffer(eb, (char *)(result), \ |
| 1267 | ((unsigned long)(ptr)) + \ |
| 1268 | offsetof(type, member), \ |
| 1269 | sizeof(((type *)0)->member))) |
| 1270 | |
| 1271 | #define write_eb_member(eb, ptr, type, member, result) ( \ |
| 1272 | write_extent_buffer(eb, (char *)(result), \ |
| 1273 | ((unsigned long)(ptr)) + \ |
| 1274 | offsetof(type, member), \ |
| 1275 | sizeof(((type *)0)->member))) |
| 1276 | |
| 1277 | #ifndef BTRFS_SETGET_FUNCS |
| 1278 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
| 1279 | u##bits btrfs_##name(struct extent_buffer *eb, type *s); \ |
| 1280 | void btrfs_set_##name(struct extent_buffer *eb, type *s, u##bits val); |
| 1281 | #endif |
| 1282 | |
| 1283 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| 1284 | static inline u##bits btrfs_##name(struct extent_buffer *eb) \ |
| 1285 | { \ |
| 1286 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| 1287 | u##bits res = le##bits##_to_cpu(p->member); \ |
| 1288 | kunmap_atomic(p, KM_USER0); \ |
| 1289 | return res; \ |
| 1290 | } \ |
| 1291 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| 1292 | u##bits val) \ |
| 1293 | { \ |
| 1294 | type *p = kmap_atomic(eb->first_page, KM_USER0); \ |
| 1295 | p->member = cpu_to_le##bits(val); \ |
| 1296 | kunmap_atomic(p, KM_USER0); \ |
| 1297 | } |
| 1298 | |
| 1299 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| 1300 | static inline u##bits btrfs_##name(type *s) \ |
| 1301 | { \ |
| 1302 | return le##bits##_to_cpu(s->member); \ |
| 1303 | } \ |
| 1304 | static inline void btrfs_set_##name(type *s, u##bits val) \ |
| 1305 | { \ |
| 1306 | s->member = cpu_to_le##bits(val); \ |
| 1307 | } |
| 1308 | |
| 1309 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| 1310 | BTRFS_SETGET_FUNCS(device_total_bytes, struct btrfs_dev_item, total_bytes, 64); |
| 1311 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| 1312 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| 1313 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); |
| 1314 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
| 1315 | start_offset, 64); |
| 1316 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| 1317 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
| 1318 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
| 1319 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); |
| 1320 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); |
| 1321 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
| 1322 | |
| 1323 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
| 1324 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, |
| 1325 | total_bytes, 64); |
| 1326 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, |
| 1327 | bytes_used, 64); |
| 1328 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, |
| 1329 | io_align, 32); |
| 1330 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, |
| 1331 | io_width, 32); |
| 1332 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, |
| 1333 | sector_size, 32); |
| 1334 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); |
| 1335 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
| 1336 | dev_group, 32); |
| 1337 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, |
| 1338 | seek_speed, 8); |
| 1339 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, |
| 1340 | bandwidth, 8); |
| 1341 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
| 1342 | generation, 64); |
| 1343 | |
| 1344 | static inline char *btrfs_device_uuid(struct btrfs_dev_item *d) |
| 1345 | { |
| 1346 | return (char *)d + offsetof(struct btrfs_dev_item, uuid); |
| 1347 | } |
| 1348 | |
| 1349 | static inline char *btrfs_device_fsid(struct btrfs_dev_item *d) |
| 1350 | { |
| 1351 | return (char *)d + offsetof(struct btrfs_dev_item, fsid); |
| 1352 | } |
| 1353 | |
| 1354 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
| 1355 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| 1356 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| 1357 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| 1358 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| 1359 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| 1360 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| 1361 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
| 1362 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
| 1363 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| 1364 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| 1365 | |
| 1366 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
| 1367 | { |
| 1368 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); |
| 1369 | } |
| 1370 | |
| 1371 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); |
| 1372 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| 1373 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| 1374 | stripe_len, 64); |
| 1375 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| 1376 | io_align, 32); |
| 1377 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| 1378 | io_width, 32); |
| 1379 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| 1380 | sector_size, 32); |
| 1381 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| 1382 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| 1383 | num_stripes, 16); |
| 1384 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
| 1385 | sub_stripes, 16); |
| 1386 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| 1387 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| 1388 | |
| 1389 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| 1390 | int nr) |
| 1391 | { |
| 1392 | unsigned long offset = (unsigned long)c; |
| 1393 | offset += offsetof(struct btrfs_chunk, stripe); |
| 1394 | offset += nr * sizeof(struct btrfs_stripe); |
| 1395 | return (struct btrfs_stripe *)offset; |
| 1396 | } |
| 1397 | |
| 1398 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
| 1399 | { |
| 1400 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); |
| 1401 | } |
| 1402 | |
| 1403 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| 1404 | struct btrfs_chunk *c, int nr) |
| 1405 | { |
| 1406 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| 1407 | } |
| 1408 | |
| 1409 | static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb, |
| 1410 | struct btrfs_chunk *c, int nr, |
| 1411 | u64 val) |
| 1412 | { |
| 1413 | btrfs_set_stripe_offset(eb, btrfs_stripe_nr(c, nr), val); |
| 1414 | } |
| 1415 | |
| 1416 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| 1417 | struct btrfs_chunk *c, int nr) |
| 1418 | { |
| 1419 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| 1420 | } |
| 1421 | |
| 1422 | static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb, |
| 1423 | struct btrfs_chunk *c, int nr, |
| 1424 | u64 val) |
| 1425 | { |
| 1426 | btrfs_set_stripe_devid(eb, btrfs_stripe_nr(c, nr), val); |
| 1427 | } |
| 1428 | |
| 1429 | /* struct btrfs_block_group_item */ |
| 1430 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| 1431 | used, 64); |
| 1432 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| 1433 | used, 64); |
| 1434 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| 1435 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 1436 | |
| 1437 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, |
| 1438 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 1439 | BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| 1440 | struct btrfs_block_group_item, flags, 64); |
| 1441 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| 1442 | struct btrfs_block_group_item, flags, 64); |
| 1443 | |
| 1444 | /* struct btrfs_inode_ref */ |
| 1445 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| 1446 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
| 1447 | |
| 1448 | /* struct btrfs_inode_item */ |
| 1449 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
| 1450 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
| 1451 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
| 1452 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
| 1453 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
| 1454 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| 1455 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 1456 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| 1457 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| 1458 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
| 1459 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
| 1460 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
| 1461 | |
| 1462 | static inline struct btrfs_timespec * |
| 1463 | btrfs_inode_atime(struct btrfs_inode_item *inode_item) |
| 1464 | { |
| 1465 | unsigned long ptr = (unsigned long)inode_item; |
| 1466 | ptr += offsetof(struct btrfs_inode_item, atime); |
| 1467 | return (struct btrfs_timespec *)ptr; |
| 1468 | } |
| 1469 | |
| 1470 | static inline struct btrfs_timespec * |
| 1471 | btrfs_inode_mtime(struct btrfs_inode_item *inode_item) |
| 1472 | { |
| 1473 | unsigned long ptr = (unsigned long)inode_item; |
| 1474 | ptr += offsetof(struct btrfs_inode_item, mtime); |
| 1475 | return (struct btrfs_timespec *)ptr; |
| 1476 | } |
| 1477 | |
| 1478 | static inline struct btrfs_timespec * |
| 1479 | btrfs_inode_ctime(struct btrfs_inode_item *inode_item) |
| 1480 | { |
| 1481 | unsigned long ptr = (unsigned long)inode_item; |
| 1482 | ptr += offsetof(struct btrfs_inode_item, ctime); |
| 1483 | return (struct btrfs_timespec *)ptr; |
| 1484 | } |
| 1485 | |
| 1486 | static inline struct btrfs_timespec * |
| 1487 | btrfs_inode_otime(struct btrfs_inode_item *inode_item) |
| 1488 | { |
| 1489 | unsigned long ptr = (unsigned long)inode_item; |
| 1490 | ptr += offsetof(struct btrfs_inode_item, otime); |
| 1491 | return (struct btrfs_timespec *)ptr; |
| 1492 | } |
| 1493 | |
| 1494 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| 1495 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
| 1496 | |
| 1497 | /* struct btrfs_dev_extent */ |
| 1498 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
| 1499 | chunk_tree, 64); |
| 1500 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, |
| 1501 | chunk_objectid, 64); |
| 1502 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, |
| 1503 | chunk_offset, 64); |
| 1504 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| 1505 | |
| 1506 | static inline u8 *btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| 1507 | { |
| 1508 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| 1509 | return (u8 *)((unsigned long)dev + ptr); |
| 1510 | } |
| 1511 | |
| 1512 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
| 1513 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, |
| 1514 | generation, 64); |
| 1515 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); |
| 1516 | |
| 1517 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
| 1518 | |
| 1519 | |
| 1520 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); |
| 1521 | |
| 1522 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, |
| 1523 | struct btrfs_tree_block_info *item, |
| 1524 | struct btrfs_disk_key *key) |
| 1525 | { |
| 1526 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1527 | } |
| 1528 | |
| 1529 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, |
| 1530 | struct btrfs_tree_block_info *item, |
| 1531 | struct btrfs_disk_key *key) |
| 1532 | { |
| 1533 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1534 | } |
| 1535 | |
| 1536 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
| 1537 | root, 64); |
| 1538 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, |
| 1539 | objectid, 64); |
| 1540 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, |
| 1541 | offset, 64); |
| 1542 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, |
| 1543 | count, 32); |
| 1544 | |
| 1545 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, |
| 1546 | count, 32); |
| 1547 | |
| 1548 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, |
| 1549 | type, 8); |
| 1550 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, |
| 1551 | offset, 64); |
| 1552 | |
| 1553 | static inline u32 btrfs_extent_inline_ref_size(int type) |
| 1554 | { |
| 1555 | if (type == BTRFS_TREE_BLOCK_REF_KEY || |
| 1556 | type == BTRFS_SHARED_BLOCK_REF_KEY) |
| 1557 | return sizeof(struct btrfs_extent_inline_ref); |
| 1558 | if (type == BTRFS_SHARED_DATA_REF_KEY) |
| 1559 | return sizeof(struct btrfs_shared_data_ref) + |
| 1560 | sizeof(struct btrfs_extent_inline_ref); |
| 1561 | if (type == BTRFS_EXTENT_DATA_REF_KEY) |
| 1562 | return sizeof(struct btrfs_extent_data_ref) + |
| 1563 | offsetof(struct btrfs_extent_inline_ref, offset); |
| 1564 | BUG(); |
| 1565 | return 0; |
| 1566 | } |
| 1567 | |
| 1568 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); |
| 1569 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, |
| 1570 | generation, 64); |
| 1571 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); |
| 1572 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); |
| 1573 | |
| 1574 | /* struct btrfs_node */ |
| 1575 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
| 1576 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
| 1577 | |
| 1578 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
| 1579 | { |
| 1580 | unsigned long ptr; |
| 1581 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1582 | sizeof(struct btrfs_key_ptr) * nr; |
| 1583 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
| 1584 | } |
| 1585 | |
| 1586 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| 1587 | int nr, u64 val) |
| 1588 | { |
| 1589 | unsigned long ptr; |
| 1590 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1591 | sizeof(struct btrfs_key_ptr) * nr; |
| 1592 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
| 1593 | } |
| 1594 | |
| 1595 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| 1596 | { |
| 1597 | unsigned long ptr; |
| 1598 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1599 | sizeof(struct btrfs_key_ptr) * nr; |
| 1600 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| 1601 | } |
| 1602 | |
| 1603 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| 1604 | int nr, u64 val) |
| 1605 | { |
| 1606 | unsigned long ptr; |
| 1607 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1608 | sizeof(struct btrfs_key_ptr) * nr; |
| 1609 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| 1610 | } |
| 1611 | |
| 1612 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
| 1613 | { |
| 1614 | return offsetof(struct btrfs_node, ptrs) + |
| 1615 | sizeof(struct btrfs_key_ptr) * nr; |
| 1616 | } |
| 1617 | |
| 1618 | void btrfs_node_key(struct extent_buffer *eb, |
| 1619 | struct btrfs_disk_key *disk_key, int nr); |
| 1620 | |
| 1621 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| 1622 | struct btrfs_disk_key *disk_key, int nr) |
| 1623 | { |
| 1624 | unsigned long ptr; |
| 1625 | ptr = btrfs_node_key_ptr_offset(nr); |
| 1626 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| 1627 | struct btrfs_key_ptr, key, disk_key); |
| 1628 | } |
| 1629 | |
| 1630 | /* struct btrfs_item */ |
| 1631 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| 1632 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| 1633 | |
| 1634 | static inline unsigned long btrfs_item_nr_offset(int nr) |
| 1635 | { |
| 1636 | return offsetof(struct btrfs_leaf, items) + |
| 1637 | sizeof(struct btrfs_item) * nr; |
| 1638 | } |
| 1639 | |
| 1640 | static inline struct btrfs_item *btrfs_item_nr(struct extent_buffer *eb, |
| 1641 | int nr) |
| 1642 | { |
| 1643 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
| 1644 | } |
| 1645 | |
| 1646 | static inline u32 btrfs_item_end(struct extent_buffer *eb, |
| 1647 | struct btrfs_item *item) |
| 1648 | { |
| 1649 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
| 1650 | } |
| 1651 | |
| 1652 | static inline u32 btrfs_item_end_nr(struct extent_buffer *eb, int nr) |
| 1653 | { |
| 1654 | return btrfs_item_end(eb, btrfs_item_nr(eb, nr)); |
| 1655 | } |
| 1656 | |
| 1657 | static inline u32 btrfs_item_offset_nr(struct extent_buffer *eb, int nr) |
| 1658 | { |
| 1659 | return btrfs_item_offset(eb, btrfs_item_nr(eb, nr)); |
| 1660 | } |
| 1661 | |
| 1662 | static inline u32 btrfs_item_size_nr(struct extent_buffer *eb, int nr) |
| 1663 | { |
| 1664 | return btrfs_item_size(eb, btrfs_item_nr(eb, nr)); |
| 1665 | } |
| 1666 | |
| 1667 | static inline void btrfs_item_key(struct extent_buffer *eb, |
| 1668 | struct btrfs_disk_key *disk_key, int nr) |
| 1669 | { |
| 1670 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 1671 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| 1672 | } |
| 1673 | |
| 1674 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| 1675 | struct btrfs_disk_key *disk_key, int nr) |
| 1676 | { |
| 1677 | struct btrfs_item *item = btrfs_item_nr(eb, nr); |
| 1678 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| 1679 | } |
| 1680 | |
| 1681 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
| 1682 | |
| 1683 | /* |
| 1684 | * struct btrfs_root_ref |
| 1685 | */ |
| 1686 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); |
| 1687 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); |
| 1688 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); |
| 1689 | |
| 1690 | /* struct btrfs_dir_item */ |
| 1691 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
| 1692 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| 1693 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); |
| 1694 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
| 1695 | |
| 1696 | static inline void btrfs_dir_item_key(struct extent_buffer *eb, |
| 1697 | struct btrfs_dir_item *item, |
| 1698 | struct btrfs_disk_key *key) |
| 1699 | { |
| 1700 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| 1701 | } |
| 1702 | |
| 1703 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| 1704 | struct btrfs_dir_item *item, |
| 1705 | struct btrfs_disk_key *key) |
| 1706 | { |
| 1707 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| 1708 | } |
| 1709 | |
| 1710 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
| 1711 | num_entries, 64); |
| 1712 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, |
| 1713 | num_bitmaps, 64); |
| 1714 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, |
| 1715 | generation, 64); |
| 1716 | |
| 1717 | static inline void btrfs_free_space_key(struct extent_buffer *eb, |
| 1718 | struct btrfs_free_space_header *h, |
| 1719 | struct btrfs_disk_key *key) |
| 1720 | { |
| 1721 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 1722 | } |
| 1723 | |
| 1724 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, |
| 1725 | struct btrfs_free_space_header *h, |
| 1726 | struct btrfs_disk_key *key) |
| 1727 | { |
| 1728 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 1729 | } |
| 1730 | |
| 1731 | /* struct btrfs_disk_key */ |
| 1732 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| 1733 | objectid, 64); |
| 1734 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| 1735 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); |
| 1736 | |
| 1737 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 1738 | struct btrfs_disk_key *disk) |
| 1739 | { |
| 1740 | cpu->offset = le64_to_cpu(disk->offset); |
| 1741 | cpu->type = disk->type; |
| 1742 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 1743 | } |
| 1744 | |
| 1745 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 1746 | struct btrfs_key *cpu) |
| 1747 | { |
| 1748 | disk->offset = cpu_to_le64(cpu->offset); |
| 1749 | disk->type = cpu->type; |
| 1750 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 1751 | } |
| 1752 | |
| 1753 | static inline void btrfs_node_key_to_cpu(struct extent_buffer *eb, |
| 1754 | struct btrfs_key *key, int nr) |
| 1755 | { |
| 1756 | struct btrfs_disk_key disk_key; |
| 1757 | btrfs_node_key(eb, &disk_key, nr); |
| 1758 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1759 | } |
| 1760 | |
| 1761 | static inline void btrfs_item_key_to_cpu(struct extent_buffer *eb, |
| 1762 | struct btrfs_key *key, int nr) |
| 1763 | { |
| 1764 | struct btrfs_disk_key disk_key; |
| 1765 | btrfs_item_key(eb, &disk_key, nr); |
| 1766 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1767 | } |
| 1768 | |
| 1769 | static inline void btrfs_dir_item_key_to_cpu(struct extent_buffer *eb, |
| 1770 | struct btrfs_dir_item *item, |
| 1771 | struct btrfs_key *key) |
| 1772 | { |
| 1773 | struct btrfs_disk_key disk_key; |
| 1774 | btrfs_dir_item_key(eb, item, &disk_key); |
| 1775 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1776 | } |
| 1777 | |
| 1778 | |
| 1779 | static inline u8 btrfs_key_type(struct btrfs_key *key) |
| 1780 | { |
| 1781 | return key->type; |
| 1782 | } |
| 1783 | |
| 1784 | static inline void btrfs_set_key_type(struct btrfs_key *key, u8 val) |
| 1785 | { |
| 1786 | key->type = val; |
| 1787 | } |
| 1788 | |
| 1789 | /* struct btrfs_header */ |
| 1790 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
| 1791 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| 1792 | generation, 64); |
| 1793 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| 1794 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
| 1795 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
| 1796 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| 1797 | |
| 1798 | static inline int btrfs_header_flag(struct extent_buffer *eb, u64 flag) |
| 1799 | { |
| 1800 | return (btrfs_header_flags(eb) & flag) == flag; |
| 1801 | } |
| 1802 | |
| 1803 | static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) |
| 1804 | { |
| 1805 | u64 flags = btrfs_header_flags(eb); |
| 1806 | btrfs_set_header_flags(eb, flags | flag); |
| 1807 | return (flags & flag) == flag; |
| 1808 | } |
| 1809 | |
| 1810 | static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) |
| 1811 | { |
| 1812 | u64 flags = btrfs_header_flags(eb); |
| 1813 | btrfs_set_header_flags(eb, flags & ~flag); |
| 1814 | return (flags & flag) == flag; |
| 1815 | } |
| 1816 | |
| 1817 | static inline int btrfs_header_backref_rev(struct extent_buffer *eb) |
| 1818 | { |
| 1819 | u64 flags = btrfs_header_flags(eb); |
| 1820 | return flags >> BTRFS_BACKREF_REV_SHIFT; |
| 1821 | } |
| 1822 | |
| 1823 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, |
| 1824 | int rev) |
| 1825 | { |
| 1826 | u64 flags = btrfs_header_flags(eb); |
| 1827 | flags &= ~BTRFS_BACKREF_REV_MASK; |
| 1828 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; |
| 1829 | btrfs_set_header_flags(eb, flags); |
| 1830 | } |
| 1831 | |
| 1832 | static inline u8 *btrfs_header_fsid(struct extent_buffer *eb) |
| 1833 | { |
| 1834 | unsigned long ptr = offsetof(struct btrfs_header, fsid); |
| 1835 | return (u8 *)ptr; |
| 1836 | } |
| 1837 | |
| 1838 | static inline u8 *btrfs_header_chunk_tree_uuid(struct extent_buffer *eb) |
| 1839 | { |
| 1840 | unsigned long ptr = offsetof(struct btrfs_header, chunk_tree_uuid); |
| 1841 | return (u8 *)ptr; |
| 1842 | } |
| 1843 | |
| 1844 | static inline u8 *btrfs_super_fsid(struct extent_buffer *eb) |
| 1845 | { |
| 1846 | unsigned long ptr = offsetof(struct btrfs_super_block, fsid); |
| 1847 | return (u8 *)ptr; |
| 1848 | } |
| 1849 | |
| 1850 | static inline u8 *btrfs_header_csum(struct extent_buffer *eb) |
| 1851 | { |
| 1852 | unsigned long ptr = offsetof(struct btrfs_header, csum); |
| 1853 | return (u8 *)ptr; |
| 1854 | } |
| 1855 | |
| 1856 | static inline struct btrfs_node *btrfs_buffer_node(struct extent_buffer *eb) |
| 1857 | { |
| 1858 | return NULL; |
| 1859 | } |
| 1860 | |
| 1861 | static inline struct btrfs_leaf *btrfs_buffer_leaf(struct extent_buffer *eb) |
| 1862 | { |
| 1863 | return NULL; |
| 1864 | } |
| 1865 | |
| 1866 | static inline struct btrfs_header *btrfs_buffer_header(struct extent_buffer *eb) |
| 1867 | { |
| 1868 | return NULL; |
| 1869 | } |
| 1870 | |
| 1871 | static inline int btrfs_is_leaf(struct extent_buffer *eb) |
| 1872 | { |
| 1873 | return btrfs_header_level(eb) == 0; |
| 1874 | } |
| 1875 | |
| 1876 | /* struct btrfs_root_item */ |
| 1877 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
| 1878 | generation, 64); |
| 1879 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
| 1880 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1881 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
| 1882 | |
| 1883 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
| 1884 | generation, 64); |
| 1885 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1886 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
| 1887 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| 1888 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
| 1889 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
| 1890 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| 1891 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); |
| 1892 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
| 1893 | last_snapshot, 64); |
| 1894 | |
| 1895 | /* struct btrfs_super_block */ |
| 1896 | |
| 1897 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
| 1898 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
| 1899 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| 1900 | generation, 64); |
| 1901 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
| 1902 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| 1903 | struct btrfs_super_block, sys_chunk_array_size, 32); |
| 1904 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
| 1905 | struct btrfs_super_block, chunk_root_generation, 64); |
| 1906 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| 1907 | root_level, 8); |
| 1908 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| 1909 | chunk_root, 64); |
| 1910 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
| 1911 | chunk_root_level, 8); |
| 1912 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, |
| 1913 | log_root, 64); |
| 1914 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
| 1915 | log_root_transid, 64); |
| 1916 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
| 1917 | log_root_level, 8); |
| 1918 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| 1919 | total_bytes, 64); |
| 1920 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| 1921 | bytes_used, 64); |
| 1922 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| 1923 | sectorsize, 32); |
| 1924 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| 1925 | nodesize, 32); |
| 1926 | BTRFS_SETGET_STACK_FUNCS(super_leafsize, struct btrfs_super_block, |
| 1927 | leafsize, 32); |
| 1928 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| 1929 | stripesize, 32); |
| 1930 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| 1931 | root_dir_objectid, 64); |
| 1932 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| 1933 | num_devices, 64); |
| 1934 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
| 1935 | compat_flags, 64); |
| 1936 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, |
| 1937 | compat_ro_flags, 64); |
| 1938 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
| 1939 | incompat_flags, 64); |
| 1940 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
| 1941 | csum_type, 16); |
| 1942 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
| 1943 | cache_generation, 64); |
| 1944 | |
| 1945 | static inline int btrfs_super_csum_size(struct btrfs_super_block *s) |
| 1946 | { |
| 1947 | int t = btrfs_super_csum_type(s); |
| 1948 | BUG_ON(t >= ARRAY_SIZE(btrfs_csum_sizes)); |
| 1949 | return btrfs_csum_sizes[t]; |
| 1950 | } |
| 1951 | |
| 1952 | static inline unsigned long btrfs_leaf_data(struct extent_buffer *l) |
| 1953 | { |
| 1954 | return offsetof(struct btrfs_leaf, items); |
| 1955 | } |
| 1956 | |
| 1957 | /* struct btrfs_file_extent_item */ |
| 1958 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); |
| 1959 | |
| 1960 | static inline unsigned long |
| 1961 | btrfs_file_extent_inline_start(struct btrfs_file_extent_item *e) |
| 1962 | { |
| 1963 | unsigned long offset = (unsigned long)e; |
| 1964 | offset += offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| 1965 | return offset; |
| 1966 | } |
| 1967 | |
| 1968 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 1969 | { |
| 1970 | return offsetof(struct btrfs_file_extent_item, disk_bytenr) + datasize; |
| 1971 | } |
| 1972 | |
| 1973 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| 1974 | disk_bytenr, 64); |
| 1975 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| 1976 | generation, 64); |
| 1977 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| 1978 | disk_num_bytes, 64); |
| 1979 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| 1980 | offset, 64); |
| 1981 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| 1982 | num_bytes, 64); |
| 1983 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
| 1984 | ram_bytes, 64); |
| 1985 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, |
| 1986 | compression, 8); |
| 1987 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, |
| 1988 | encryption, 8); |
| 1989 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, |
| 1990 | other_encoding, 16); |
| 1991 | |
| 1992 | /* this returns the number of file bytes represented by the inline item. |
| 1993 | * If an item is compressed, this is the uncompressed size |
| 1994 | */ |
| 1995 | static inline u32 btrfs_file_extent_inline_len(struct extent_buffer *eb, |
| 1996 | struct btrfs_file_extent_item *e) |
| 1997 | { |
| 1998 | return btrfs_file_extent_ram_bytes(eb, e); |
| 1999 | } |
| 2000 | |
| 2001 | /* |
| 2002 | * this returns the number of bytes used by the item on disk, minus the |
| 2003 | * size of any extent headers. If a file is compressed on disk, this is |
| 2004 | * the compressed size |
| 2005 | */ |
| 2006 | static inline u32 btrfs_file_extent_inline_item_len(struct extent_buffer *eb, |
| 2007 | struct btrfs_item *e) |
| 2008 | { |
| 2009 | unsigned long offset; |
| 2010 | offset = offsetof(struct btrfs_file_extent_item, disk_bytenr); |
| 2011 | return btrfs_item_size(eb, e) - offset; |
| 2012 | } |
| 2013 | |
| 2014 | static inline struct btrfs_root *btrfs_sb(struct super_block *sb) |
| 2015 | { |
| 2016 | return sb->s_fs_info; |
| 2017 | } |
| 2018 | |
| 2019 | static inline int btrfs_set_root_name(struct btrfs_root *root, |
| 2020 | const char *name, int len) |
| 2021 | { |
| 2022 | /* if we already have a name just free it */ |
| 2023 | kfree(root->name); |
| 2024 | |
| 2025 | root->name = kmalloc(len+1, GFP_KERNEL); |
| 2026 | if (!root->name) |
| 2027 | return -ENOMEM; |
| 2028 | |
| 2029 | memcpy(root->name, name, len); |
| 2030 | root->name[len] = '\0'; |
| 2031 | |
| 2032 | return 0; |
| 2033 | } |
| 2034 | |
| 2035 | static inline u32 btrfs_level_size(struct btrfs_root *root, int level) |
| 2036 | { |
| 2037 | if (level == 0) |
| 2038 | return root->leafsize; |
| 2039 | return root->nodesize; |
| 2040 | } |
| 2041 | |
| 2042 | /* helper function to cast into the data area of the leaf. */ |
| 2043 | #define btrfs_item_ptr(leaf, slot, type) \ |
| 2044 | ((type *)(btrfs_leaf_data(leaf) + \ |
| 2045 | btrfs_item_offset_nr(leaf, slot))) |
| 2046 | |
| 2047 | #define btrfs_item_ptr_offset(leaf, slot) \ |
| 2048 | ((unsigned long)(btrfs_leaf_data(leaf) + \ |
| 2049 | btrfs_item_offset_nr(leaf, slot))) |
| 2050 | |
| 2051 | static inline struct dentry *fdentry(struct file *file) |
| 2052 | { |
| 2053 | return file->f_path.dentry; |
| 2054 | } |
| 2055 | |
| 2056 | static inline bool btrfs_mixed_space_info(struct btrfs_space_info *space_info) |
| 2057 | { |
| 2058 | return ((space_info->flags & BTRFS_BLOCK_GROUP_METADATA) && |
| 2059 | (space_info->flags & BTRFS_BLOCK_GROUP_DATA)); |
| 2060 | } |
| 2061 | |
| 2062 | /* extent-tree.c */ |
| 2063 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
| 2064 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
| 2065 | struct btrfs_root *root, unsigned long count); |
| 2066 | int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len); |
| 2067 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
| 2068 | struct btrfs_root *root, u64 bytenr, |
| 2069 | u64 num_bytes, u64 *refs, u64 *flags); |
| 2070 | int btrfs_pin_extent(struct btrfs_root *root, |
| 2071 | u64 bytenr, u64 num, int reserved); |
| 2072 | int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans, |
| 2073 | struct btrfs_root *root, struct extent_buffer *leaf); |
| 2074 | int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans, |
| 2075 | struct btrfs_root *root, |
| 2076 | u64 objectid, u64 offset, u64 bytenr); |
| 2077 | int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy); |
| 2078 | struct btrfs_block_group_cache *btrfs_lookup_block_group( |
| 2079 | struct btrfs_fs_info *info, |
| 2080 | u64 bytenr); |
| 2081 | void btrfs_put_block_group(struct btrfs_block_group_cache *cache); |
| 2082 | u64 btrfs_find_block_group(struct btrfs_root *root, |
| 2083 | u64 search_start, u64 search_hint, int owner); |
| 2084 | struct extent_buffer *btrfs_alloc_free_block(struct btrfs_trans_handle *trans, |
| 2085 | struct btrfs_root *root, u32 blocksize, |
| 2086 | u64 parent, u64 root_objectid, |
| 2087 | struct btrfs_disk_key *key, int level, |
| 2088 | u64 hint, u64 empty_size); |
| 2089 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
| 2090 | struct btrfs_root *root, |
| 2091 | struct extent_buffer *buf, |
| 2092 | u64 parent, int last_ref); |
| 2093 | struct extent_buffer *btrfs_init_new_buffer(struct btrfs_trans_handle *trans, |
| 2094 | struct btrfs_root *root, |
| 2095 | u64 bytenr, u32 blocksize, |
| 2096 | int level); |
| 2097 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
| 2098 | struct btrfs_root *root, |
| 2099 | u64 root_objectid, u64 owner, |
| 2100 | u64 offset, struct btrfs_key *ins); |
| 2101 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, |
| 2102 | struct btrfs_root *root, |
| 2103 | u64 root_objectid, u64 owner, u64 offset, |
| 2104 | struct btrfs_key *ins); |
| 2105 | int btrfs_reserve_extent(struct btrfs_trans_handle *trans, |
| 2106 | struct btrfs_root *root, |
| 2107 | u64 num_bytes, u64 min_alloc_size, |
| 2108 | u64 empty_size, u64 hint_byte, |
| 2109 | u64 search_end, struct btrfs_key *ins, |
| 2110 | u64 data); |
| 2111 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2112 | struct extent_buffer *buf, int full_backref); |
| 2113 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2114 | struct extent_buffer *buf, int full_backref); |
| 2115 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
| 2116 | struct btrfs_root *root, |
| 2117 | u64 bytenr, u64 num_bytes, u64 flags, |
| 2118 | int is_data); |
| 2119 | int btrfs_free_extent(struct btrfs_trans_handle *trans, |
| 2120 | struct btrfs_root *root, |
| 2121 | u64 bytenr, u64 num_bytes, u64 parent, |
| 2122 | u64 root_objectid, u64 owner, u64 offset); |
| 2123 | |
| 2124 | int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len); |
| 2125 | int btrfs_prepare_extent_commit(struct btrfs_trans_handle *trans, |
| 2126 | struct btrfs_root *root); |
| 2127 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans, |
| 2128 | struct btrfs_root *root); |
| 2129 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 2130 | struct btrfs_root *root, |
| 2131 | u64 bytenr, u64 num_bytes, u64 parent, |
| 2132 | u64 root_objectid, u64 owner, u64 offset); |
| 2133 | |
| 2134 | int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans, |
| 2135 | struct btrfs_root *root); |
| 2136 | int btrfs_extent_readonly(struct btrfs_root *root, u64 bytenr); |
| 2137 | int btrfs_free_block_groups(struct btrfs_fs_info *info); |
| 2138 | int btrfs_read_block_groups(struct btrfs_root *root); |
| 2139 | int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr); |
| 2140 | int btrfs_make_block_group(struct btrfs_trans_handle *trans, |
| 2141 | struct btrfs_root *root, u64 bytes_used, |
| 2142 | u64 type, u64 chunk_objectid, u64 chunk_offset, |
| 2143 | u64 size); |
| 2144 | int btrfs_remove_block_group(struct btrfs_trans_handle *trans, |
| 2145 | struct btrfs_root *root, u64 group_start); |
| 2146 | u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags); |
| 2147 | void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde); |
| 2148 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
| 2149 | int btrfs_check_data_free_space(struct inode *inode, u64 bytes); |
| 2150 | void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); |
| 2151 | int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2152 | struct btrfs_root *root, |
| 2153 | int num_items); |
| 2154 | void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, |
| 2155 | struct btrfs_root *root); |
| 2156 | int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2157 | struct inode *inode); |
| 2158 | void btrfs_orphan_release_metadata(struct inode *inode); |
| 2159 | int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans, |
| 2160 | struct btrfs_pending_snapshot *pending); |
| 2161 | int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes); |
| 2162 | void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes); |
| 2163 | int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes); |
| 2164 | void btrfs_delalloc_release_space(struct inode *inode, u64 num_bytes); |
| 2165 | void btrfs_init_block_rsv(struct btrfs_block_rsv *rsv); |
| 2166 | struct btrfs_block_rsv *btrfs_alloc_block_rsv(struct btrfs_root *root); |
| 2167 | void btrfs_free_block_rsv(struct btrfs_root *root, |
| 2168 | struct btrfs_block_rsv *rsv); |
| 2169 | void btrfs_add_durable_block_rsv(struct btrfs_fs_info *fs_info, |
| 2170 | struct btrfs_block_rsv *rsv); |
| 2171 | int btrfs_block_rsv_add(struct btrfs_trans_handle *trans, |
| 2172 | struct btrfs_root *root, |
| 2173 | struct btrfs_block_rsv *block_rsv, |
| 2174 | u64 num_bytes); |
| 2175 | int btrfs_block_rsv_check(struct btrfs_trans_handle *trans, |
| 2176 | struct btrfs_root *root, |
| 2177 | struct btrfs_block_rsv *block_rsv, |
| 2178 | u64 min_reserved, int min_factor); |
| 2179 | int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv, |
| 2180 | struct btrfs_block_rsv *dst_rsv, |
| 2181 | u64 num_bytes); |
| 2182 | void btrfs_block_rsv_release(struct btrfs_root *root, |
| 2183 | struct btrfs_block_rsv *block_rsv, |
| 2184 | u64 num_bytes); |
| 2185 | int btrfs_set_block_group_ro(struct btrfs_root *root, |
| 2186 | struct btrfs_block_group_cache *cache); |
| 2187 | int btrfs_set_block_group_rw(struct btrfs_root *root, |
| 2188 | struct btrfs_block_group_cache *cache); |
| 2189 | void btrfs_put_block_group_cache(struct btrfs_fs_info *info); |
| 2190 | /* ctree.c */ |
| 2191 | int btrfs_bin_search(struct extent_buffer *eb, struct btrfs_key *key, |
| 2192 | int level, int *slot); |
| 2193 | int btrfs_comp_cpu_keys(struct btrfs_key *k1, struct btrfs_key *k2); |
| 2194 | int btrfs_previous_item(struct btrfs_root *root, |
| 2195 | struct btrfs_path *path, u64 min_objectid, |
| 2196 | int type); |
| 2197 | int btrfs_set_item_key_safe(struct btrfs_trans_handle *trans, |
| 2198 | struct btrfs_root *root, struct btrfs_path *path, |
| 2199 | struct btrfs_key *new_key); |
| 2200 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
| 2201 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); |
| 2202 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
| 2203 | struct btrfs_key *key, int lowest_level, |
| 2204 | int cache_only, u64 min_trans); |
| 2205 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, |
| 2206 | struct btrfs_key *max_key, |
| 2207 | struct btrfs_path *path, int cache_only, |
| 2208 | u64 min_trans); |
| 2209 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| 2210 | struct btrfs_root *root, struct extent_buffer *buf, |
| 2211 | struct extent_buffer *parent, int parent_slot, |
| 2212 | struct extent_buffer **cow_ret); |
| 2213 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| 2214 | struct btrfs_root *root, |
| 2215 | struct extent_buffer *buf, |
| 2216 | struct extent_buffer **cow_ret, u64 new_root_objectid); |
| 2217 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
| 2218 | struct extent_buffer *buf); |
| 2219 | int btrfs_extend_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2220 | *root, struct btrfs_path *path, u32 data_size); |
| 2221 | int btrfs_truncate_item(struct btrfs_trans_handle *trans, |
| 2222 | struct btrfs_root *root, |
| 2223 | struct btrfs_path *path, |
| 2224 | u32 new_size, int from_end); |
| 2225 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
| 2226 | struct btrfs_root *root, |
| 2227 | struct btrfs_path *path, |
| 2228 | struct btrfs_key *new_key, |
| 2229 | unsigned long split_offset); |
| 2230 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
| 2231 | struct btrfs_root *root, |
| 2232 | struct btrfs_path *path, |
| 2233 | struct btrfs_key *new_key); |
| 2234 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2235 | *root, struct btrfs_key *key, struct btrfs_path *p, int |
| 2236 | ins_len, int cow); |
| 2237 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
| 2238 | struct btrfs_root *root, struct extent_buffer *parent, |
| 2239 | int start_slot, int cache_only, u64 *last_ret, |
| 2240 | struct btrfs_key *progress); |
| 2241 | void btrfs_release_path(struct btrfs_root *root, struct btrfs_path *p); |
| 2242 | struct btrfs_path *btrfs_alloc_path(void); |
| 2243 | void btrfs_free_path(struct btrfs_path *p); |
| 2244 | void btrfs_set_path_blocking(struct btrfs_path *p); |
| 2245 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
| 2246 | |
| 2247 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2248 | struct btrfs_path *path, int slot, int nr); |
| 2249 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| 2250 | struct btrfs_root *root, |
| 2251 | struct btrfs_path *path) |
| 2252 | { |
| 2253 | return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| 2254 | } |
| 2255 | |
| 2256 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2257 | *root, struct btrfs_key *key, void *data, u32 data_size); |
| 2258 | int btrfs_insert_some_items(struct btrfs_trans_handle *trans, |
| 2259 | struct btrfs_root *root, |
| 2260 | struct btrfs_path *path, |
| 2261 | struct btrfs_key *cpu_key, u32 *data_size, |
| 2262 | int nr); |
| 2263 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| 2264 | struct btrfs_root *root, |
| 2265 | struct btrfs_path *path, |
| 2266 | struct btrfs_key *cpu_key, u32 *data_size, int nr); |
| 2267 | |
| 2268 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| 2269 | struct btrfs_root *root, |
| 2270 | struct btrfs_path *path, |
| 2271 | struct btrfs_key *key, |
| 2272 | u32 data_size) |
| 2273 | { |
| 2274 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| 2275 | } |
| 2276 | |
| 2277 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 2278 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 2279 | int btrfs_leaf_free_space(struct btrfs_root *root, struct extent_buffer *leaf); |
| 2280 | int btrfs_drop_snapshot(struct btrfs_root *root, |
| 2281 | struct btrfs_block_rsv *block_rsv, int update_ref); |
| 2282 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
| 2283 | struct btrfs_root *root, |
| 2284 | struct extent_buffer *node, |
| 2285 | struct extent_buffer *parent); |
| 2286 | /* root-item.c */ |
| 2287 | int btrfs_find_root_ref(struct btrfs_root *tree_root, |
| 2288 | struct btrfs_path *path, |
| 2289 | u64 root_id, u64 ref_id); |
| 2290 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, |
| 2291 | struct btrfs_root *tree_root, |
| 2292 | u64 root_id, u64 ref_id, u64 dirid, u64 sequence, |
| 2293 | const char *name, int name_len); |
| 2294 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, |
| 2295 | struct btrfs_root *tree_root, |
| 2296 | u64 root_id, u64 ref_id, u64 dirid, u64 *sequence, |
| 2297 | const char *name, int name_len); |
| 2298 | int btrfs_del_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2299 | struct btrfs_key *key); |
| 2300 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2301 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 2302 | *item); |
| 2303 | int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2304 | *root, struct btrfs_key *key, struct btrfs_root_item |
| 2305 | *item); |
| 2306 | int btrfs_find_last_root(struct btrfs_root *root, u64 objectid, struct |
| 2307 | btrfs_root_item *item, struct btrfs_key *key); |
| 2308 | int btrfs_search_root(struct btrfs_root *root, u64 search_start, |
| 2309 | u64 *found_objectid); |
| 2310 | int btrfs_find_dead_roots(struct btrfs_root *root, u64 objectid); |
| 2311 | int btrfs_find_orphan_roots(struct btrfs_root *tree_root); |
| 2312 | int btrfs_set_root_node(struct btrfs_root_item *item, |
| 2313 | struct extent_buffer *node); |
| 2314 | /* dir-item.c */ |
| 2315 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, |
| 2316 | struct btrfs_root *root, const char *name, |
| 2317 | int name_len, u64 dir, |
| 2318 | struct btrfs_key *location, u8 type, u64 index); |
| 2319 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 2320 | struct btrfs_root *root, |
| 2321 | struct btrfs_path *path, u64 dir, |
| 2322 | const char *name, int name_len, |
| 2323 | int mod); |
| 2324 | struct btrfs_dir_item * |
| 2325 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 2326 | struct btrfs_root *root, |
| 2327 | struct btrfs_path *path, u64 dir, |
| 2328 | u64 objectid, const char *name, int name_len, |
| 2329 | int mod); |
| 2330 | struct btrfs_dir_item * |
| 2331 | btrfs_search_dir_index_item(struct btrfs_root *root, |
| 2332 | struct btrfs_path *path, u64 dirid, |
| 2333 | const char *name, int name_len); |
| 2334 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root, |
| 2335 | struct btrfs_path *path, |
| 2336 | const char *name, int name_len); |
| 2337 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 2338 | struct btrfs_root *root, |
| 2339 | struct btrfs_path *path, |
| 2340 | struct btrfs_dir_item *di); |
| 2341 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
| 2342 | struct btrfs_root *root, |
| 2343 | struct btrfs_path *path, u64 objectid, |
| 2344 | const char *name, u16 name_len, |
| 2345 | const void *data, u16 data_len); |
| 2346 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| 2347 | struct btrfs_root *root, |
| 2348 | struct btrfs_path *path, u64 dir, |
| 2349 | const char *name, u16 name_len, |
| 2350 | int mod); |
| 2351 | |
| 2352 | /* orphan.c */ |
| 2353 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, |
| 2354 | struct btrfs_root *root, u64 offset); |
| 2355 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, |
| 2356 | struct btrfs_root *root, u64 offset); |
| 2357 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
| 2358 | |
| 2359 | /* inode-map.c */ |
| 2360 | int btrfs_find_free_objectid(struct btrfs_trans_handle *trans, |
| 2361 | struct btrfs_root *fs_root, |
| 2362 | u64 dirid, u64 *objectid); |
| 2363 | int btrfs_find_highest_inode(struct btrfs_root *fs_root, u64 *objectid); |
| 2364 | |
| 2365 | /* inode-item.c */ |
| 2366 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| 2367 | struct btrfs_root *root, |
| 2368 | const char *name, int name_len, |
| 2369 | u64 inode_objectid, u64 ref_objectid, u64 index); |
| 2370 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| 2371 | struct btrfs_root *root, |
| 2372 | const char *name, int name_len, |
| 2373 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
| 2374 | struct btrfs_inode_ref * |
| 2375 | btrfs_lookup_inode_ref(struct btrfs_trans_handle *trans, |
| 2376 | struct btrfs_root *root, |
| 2377 | struct btrfs_path *path, |
| 2378 | const char *name, int name_len, |
| 2379 | u64 inode_objectid, u64 ref_objectid, int mod); |
| 2380 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| 2381 | struct btrfs_root *root, |
| 2382 | struct btrfs_path *path, u64 objectid); |
| 2383 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2384 | *root, struct btrfs_path *path, |
| 2385 | struct btrfs_key *location, int mod); |
| 2386 | |
| 2387 | /* file-item.c */ |
| 2388 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
| 2389 | struct btrfs_root *root, u64 bytenr, u64 len); |
| 2390 | int btrfs_lookup_bio_sums(struct btrfs_root *root, struct inode *inode, |
| 2391 | struct bio *bio, u32 *dst); |
| 2392 | int btrfs_lookup_bio_sums_dio(struct btrfs_root *root, struct inode *inode, |
| 2393 | struct bio *bio, u64 logical_offset, u32 *dst); |
| 2394 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
| 2395 | struct btrfs_root *root, |
| 2396 | u64 objectid, u64 pos, |
| 2397 | u64 disk_offset, u64 disk_num_bytes, |
| 2398 | u64 num_bytes, u64 offset, u64 ram_bytes, |
| 2399 | u8 compression, u8 encryption, u16 other_encoding); |
| 2400 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 2401 | struct btrfs_root *root, |
| 2402 | struct btrfs_path *path, u64 objectid, |
| 2403 | u64 bytenr, int mod); |
| 2404 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
| 2405 | struct btrfs_root *root, |
| 2406 | struct btrfs_ordered_sum *sums); |
| 2407 | int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode, |
| 2408 | struct bio *bio, u64 file_start, int contig); |
| 2409 | int btrfs_csum_file_bytes(struct btrfs_root *root, struct inode *inode, |
| 2410 | u64 start, unsigned long len); |
| 2411 | struct btrfs_csum_item *btrfs_lookup_csum(struct btrfs_trans_handle *trans, |
| 2412 | struct btrfs_root *root, |
| 2413 | struct btrfs_path *path, |
| 2414 | u64 bytenr, int cow); |
| 2415 | int btrfs_csum_truncate(struct btrfs_trans_handle *trans, |
| 2416 | struct btrfs_root *root, struct btrfs_path *path, |
| 2417 | u64 isize); |
| 2418 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, |
| 2419 | u64 end, struct list_head *list); |
| 2420 | /* inode.c */ |
| 2421 | |
| 2422 | /* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */ |
| 2423 | #if defined(ClearPageFsMisc) && !defined(ClearPageChecked) |
| 2424 | #define ClearPageChecked ClearPageFsMisc |
| 2425 | #define SetPageChecked SetPageFsMisc |
| 2426 | #define PageChecked PageFsMisc |
| 2427 | #endif |
| 2428 | |
| 2429 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
| 2430 | int btrfs_set_inode_index(struct inode *dir, u64 *index); |
| 2431 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
| 2432 | struct btrfs_root *root, |
| 2433 | struct inode *dir, struct inode *inode, |
| 2434 | const char *name, int name_len); |
| 2435 | int btrfs_add_link(struct btrfs_trans_handle *trans, |
| 2436 | struct inode *parent_inode, struct inode *inode, |
| 2437 | const char *name, int name_len, int add_backref, u64 index); |
| 2438 | int btrfs_unlink_subvol(struct btrfs_trans_handle *trans, |
| 2439 | struct btrfs_root *root, |
| 2440 | struct inode *dir, u64 objectid, |
| 2441 | const char *name, int name_len); |
| 2442 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
| 2443 | struct btrfs_root *root, |
| 2444 | struct inode *inode, u64 new_size, |
| 2445 | u32 min_type); |
| 2446 | |
| 2447 | int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput); |
| 2448 | int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput, |
| 2449 | int sync); |
| 2450 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
| 2451 | struct extent_state **cached_state); |
| 2452 | int btrfs_writepages(struct address_space *mapping, |
| 2453 | struct writeback_control *wbc); |
| 2454 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
| 2455 | struct btrfs_root *new_root, |
| 2456 | u64 new_dirid, u64 alloc_hint); |
| 2457 | int btrfs_merge_bio_hook(struct page *page, unsigned long offset, |
| 2458 | size_t size, struct bio *bio, unsigned long bio_flags); |
| 2459 | |
| 2460 | unsigned long btrfs_force_ra(struct address_space *mapping, |
| 2461 | struct file_ra_state *ra, struct file *file, |
| 2462 | pgoff_t offset, pgoff_t last_index); |
| 2463 | int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf); |
| 2464 | int btrfs_readpage(struct file *file, struct page *page); |
| 2465 | void btrfs_evict_inode(struct inode *inode); |
| 2466 | void btrfs_put_inode(struct inode *inode); |
| 2467 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
| 2468 | void btrfs_dirty_inode(struct inode *inode); |
| 2469 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 2470 | void btrfs_destroy_inode(struct inode *inode); |
| 2471 | int btrfs_drop_inode(struct inode *inode); |
| 2472 | int btrfs_init_cachep(void); |
| 2473 | void btrfs_destroy_cachep(void); |
| 2474 | long btrfs_ioctl_trans_end(struct file *file); |
| 2475 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
| 2476 | struct btrfs_root *root, int *was_new); |
| 2477 | int btrfs_commit_write(struct file *file, struct page *page, |
| 2478 | unsigned from, unsigned to); |
| 2479 | struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page, |
| 2480 | size_t page_offset, u64 start, u64 end, |
| 2481 | int create); |
| 2482 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 2483 | struct btrfs_root *root, |
| 2484 | struct inode *inode); |
| 2485 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct inode *inode); |
| 2486 | int btrfs_orphan_del(struct btrfs_trans_handle *trans, struct inode *inode); |
| 2487 | void btrfs_orphan_cleanup(struct btrfs_root *root); |
| 2488 | void btrfs_orphan_pre_snapshot(struct btrfs_trans_handle *trans, |
| 2489 | struct btrfs_pending_snapshot *pending, |
| 2490 | u64 *bytes_to_reserve); |
| 2491 | void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans, |
| 2492 | struct btrfs_pending_snapshot *pending); |
| 2493 | void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, |
| 2494 | struct btrfs_root *root); |
| 2495 | int btrfs_cont_expand(struct inode *inode, loff_t size); |
| 2496 | int btrfs_invalidate_inodes(struct btrfs_root *root); |
| 2497 | void btrfs_add_delayed_iput(struct inode *inode); |
| 2498 | void btrfs_run_delayed_iputs(struct btrfs_root *root); |
| 2499 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
| 2500 | u64 start, u64 num_bytes, u64 min_size, |
| 2501 | loff_t actual_len, u64 *alloc_hint); |
| 2502 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
| 2503 | struct btrfs_trans_handle *trans, int mode, |
| 2504 | u64 start, u64 num_bytes, u64 min_size, |
| 2505 | loff_t actual_len, u64 *alloc_hint); |
| 2506 | extern const struct dentry_operations btrfs_dentry_operations; |
| 2507 | |
| 2508 | /* ioctl.c */ |
| 2509 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| 2510 | void btrfs_update_iflags(struct inode *inode); |
| 2511 | void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); |
| 2512 | |
| 2513 | /* file.c */ |
| 2514 | int btrfs_sync_file(struct file *file, int datasync); |
| 2515 | int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, |
| 2516 | int skip_pinned); |
| 2517 | int btrfs_check_file(struct btrfs_root *root, struct inode *inode); |
| 2518 | extern const struct file_operations btrfs_file_operations; |
| 2519 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, struct inode *inode, |
| 2520 | u64 start, u64 end, u64 *hint_byte, int drop_cache); |
| 2521 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
| 2522 | struct inode *inode, u64 start, u64 end); |
| 2523 | int btrfs_release_file(struct inode *inode, struct file *file); |
| 2524 | |
| 2525 | /* tree-defrag.c */ |
| 2526 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 2527 | struct btrfs_root *root, int cache_only); |
| 2528 | |
| 2529 | /* sysfs.c */ |
| 2530 | int btrfs_init_sysfs(void); |
| 2531 | void btrfs_exit_sysfs(void); |
| 2532 | int btrfs_sysfs_add_super(struct btrfs_fs_info *fs); |
| 2533 | int btrfs_sysfs_add_root(struct btrfs_root *root); |
| 2534 | void btrfs_sysfs_del_root(struct btrfs_root *root); |
| 2535 | void btrfs_sysfs_del_super(struct btrfs_fs_info *root); |
| 2536 | |
| 2537 | /* xattr.c */ |
| 2538 | ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size); |
| 2539 | |
| 2540 | /* super.c */ |
| 2541 | int btrfs_parse_options(struct btrfs_root *root, char *options); |
| 2542 | int btrfs_sync_fs(struct super_block *sb, int wait); |
| 2543 | |
| 2544 | /* acl.c */ |
| 2545 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
| 2546 | int btrfs_check_acl(struct inode *inode, int mask); |
| 2547 | #else |
| 2548 | #define btrfs_check_acl NULL |
| 2549 | #endif |
| 2550 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 2551 | struct inode *inode, struct inode *dir); |
| 2552 | int btrfs_acl_chmod(struct inode *inode); |
| 2553 | |
| 2554 | /* relocation.c */ |
| 2555 | int btrfs_relocate_block_group(struct btrfs_root *root, u64 group_start); |
| 2556 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, |
| 2557 | struct btrfs_root *root); |
| 2558 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, |
| 2559 | struct btrfs_root *root); |
| 2560 | int btrfs_recover_relocation(struct btrfs_root *root); |
| 2561 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); |
| 2562 | void btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
| 2563 | struct btrfs_root *root, struct extent_buffer *buf, |
| 2564 | struct extent_buffer *cow); |
| 2565 | void btrfs_reloc_pre_snapshot(struct btrfs_trans_handle *trans, |
| 2566 | struct btrfs_pending_snapshot *pending, |
| 2567 | u64 *bytes_to_reserve); |
| 2568 | void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
| 2569 | struct btrfs_pending_snapshot *pending); |
| 2570 | #endif |