| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * Copyright (C) 2007 Oracle. All rights reserved. |
| 4 | */ |
| 5 | |
| 6 | #ifndef BTRFS_CTREE_H |
| 7 | #define BTRFS_CTREE_H |
| 8 | |
| 9 | #include <linux/mm.h> |
| 10 | #include <linux/sched/signal.h> |
| 11 | #include <linux/highmem.h> |
| 12 | #include <linux/fs.h> |
| 13 | #include <linux/rwsem.h> |
| 14 | #include <linux/semaphore.h> |
| 15 | #include <linux/completion.h> |
| 16 | #include <linux/backing-dev.h> |
| 17 | #include <linux/wait.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <trace/events/btrfs.h> |
| 20 | #include <asm/kmap_types.h> |
| 21 | #include <asm/unaligned.h> |
| 22 | #include <linux/pagemap.h> |
| 23 | #include <linux/btrfs.h> |
| 24 | #include <linux/btrfs_tree.h> |
| 25 | #include <linux/workqueue.h> |
| 26 | #include <linux/security.h> |
| 27 | #include <linux/sizes.h> |
| 28 | #include <linux/dynamic_debug.h> |
| 29 | #include <linux/refcount.h> |
| 30 | #include <linux/crc32c.h> |
| 31 | #include "extent_io.h" |
| 32 | #include "extent_map.h" |
| 33 | #include "async-thread.h" |
| 34 | #include "block-rsv.h" |
| 35 | |
| 36 | struct btrfs_trans_handle; |
| 37 | struct btrfs_transaction; |
| 38 | struct btrfs_pending_snapshot; |
| 39 | struct btrfs_delayed_ref_root; |
| 40 | struct btrfs_space_info; |
| 41 | struct btrfs_block_group_cache; |
| 42 | extern struct kmem_cache *btrfs_trans_handle_cachep; |
| 43 | extern struct kmem_cache *btrfs_bit_radix_cachep; |
| 44 | extern struct kmem_cache *btrfs_path_cachep; |
| 45 | extern struct kmem_cache *btrfs_free_space_cachep; |
| 46 | extern struct kmem_cache *btrfs_free_space_bitmap_cachep; |
| 47 | struct btrfs_ordered_sum; |
| 48 | struct btrfs_ref; |
| 49 | |
| 50 | #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */ |
| 51 | |
| 52 | /* |
| 53 | * Maximum number of mirrors that can be available for all profiles counting |
| 54 | * the target device of dev-replace as one. During an active device replace |
| 55 | * procedure, the target device of the copy operation is a mirror for the |
| 56 | * filesystem data as well that can be used to read data in order to repair |
| 57 | * read errors on other disks. |
| 58 | * |
| 59 | * Current value is derived from RAID1 with 2 copies. |
| 60 | */ |
| 61 | #define BTRFS_MAX_MIRRORS (2 + 1) |
| 62 | |
| 63 | #define BTRFS_MAX_LEVEL 8 |
| 64 | |
| 65 | #define BTRFS_OLDEST_GENERATION 0ULL |
| 66 | |
| 67 | /* |
| 68 | * the max metadata block size. This limit is somewhat artificial, |
| 69 | * but the memmove costs go through the roof for larger blocks. |
| 70 | */ |
| 71 | #define BTRFS_MAX_METADATA_BLOCKSIZE 65536 |
| 72 | |
| 73 | /* |
| 74 | * we can actually store much bigger names, but lets not confuse the rest |
| 75 | * of linux |
| 76 | */ |
| 77 | #define BTRFS_NAME_LEN 255 |
| 78 | |
| 79 | /* |
| 80 | * Theoretical limit is larger, but we keep this down to a sane |
| 81 | * value. That should limit greatly the possibility of collisions on |
| 82 | * inode ref items. |
| 83 | */ |
| 84 | #define BTRFS_LINK_MAX 65535U |
| 85 | |
| 86 | #define BTRFS_EMPTY_DIR_SIZE 0 |
| 87 | |
| 88 | /* ioprio of readahead is set to idle */ |
| 89 | #define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0)) |
| 90 | |
| 91 | #define BTRFS_DIRTY_METADATA_THRESH SZ_32M |
| 92 | |
| 93 | /* |
| 94 | * Use large batch size to reduce overhead of metadata updates. On the reader |
| 95 | * side, we only read it when we are close to ENOSPC and the read overhead is |
| 96 | * mostly related to the number of CPUs, so it is OK to use arbitrary large |
| 97 | * value here. |
| 98 | */ |
| 99 | #define BTRFS_TOTAL_BYTES_PINNED_BATCH SZ_128M |
| 100 | |
| 101 | #define BTRFS_MAX_EXTENT_SIZE SZ_128M |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * Count how many BTRFS_MAX_EXTENT_SIZE cover the @size |
| 106 | */ |
| 107 | static inline u32 count_max_extents(u64 size) |
| 108 | { |
| 109 | return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE); |
| 110 | } |
| 111 | |
| 112 | static inline unsigned long btrfs_chunk_item_size(int num_stripes) |
| 113 | { |
| 114 | BUG_ON(num_stripes == 0); |
| 115 | return sizeof(struct btrfs_chunk) + |
| 116 | sizeof(struct btrfs_stripe) * (num_stripes - 1); |
| 117 | } |
| 118 | |
| 119 | /* |
| 120 | * Runtime (in-memory) states of filesystem |
| 121 | */ |
| 122 | enum { |
| 123 | /* Global indicator of serious filesystem errors */ |
| 124 | BTRFS_FS_STATE_ERROR, |
| 125 | /* |
| 126 | * Filesystem is being remounted, allow to skip some operations, like |
| 127 | * defrag |
| 128 | */ |
| 129 | BTRFS_FS_STATE_REMOUNTING, |
| 130 | /* Track if a transaction abort has been reported on this filesystem */ |
| 131 | BTRFS_FS_STATE_TRANS_ABORTED, |
| 132 | /* |
| 133 | * Bio operations should be blocked on this filesystem because a source |
| 134 | * or target device is being destroyed as part of a device replace |
| 135 | */ |
| 136 | BTRFS_FS_STATE_DEV_REPLACING, |
| 137 | /* The btrfs_fs_info created for self-tests */ |
| 138 | BTRFS_FS_STATE_DUMMY_FS_INFO, |
| 139 | }; |
| 140 | |
| 141 | #define BTRFS_BACKREF_REV_MAX 256 |
| 142 | #define BTRFS_BACKREF_REV_SHIFT 56 |
| 143 | #define BTRFS_BACKREF_REV_MASK (((u64)BTRFS_BACKREF_REV_MAX - 1) << \ |
| 144 | BTRFS_BACKREF_REV_SHIFT) |
| 145 | |
| 146 | #define BTRFS_OLD_BACKREF_REV 0 |
| 147 | #define BTRFS_MIXED_BACKREF_REV 1 |
| 148 | |
| 149 | /* |
| 150 | * every tree block (leaf or node) starts with this header. |
| 151 | */ |
| 152 | struct btrfs_header { |
| 153 | /* these first four must match the super block */ |
| 154 | u8 csum[BTRFS_CSUM_SIZE]; |
| 155 | u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ |
| 156 | __le64 bytenr; /* which block this node is supposed to live in */ |
| 157 | __le64 flags; |
| 158 | |
| 159 | /* allowed to be different from the super from here on down */ |
| 160 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| 161 | __le64 generation; |
| 162 | __le64 owner; |
| 163 | __le32 nritems; |
| 164 | u8 level; |
| 165 | } __attribute__ ((__packed__)); |
| 166 | |
| 167 | /* |
| 168 | * this is a very generous portion of the super block, giving us |
| 169 | * room to translate 14 chunks with 3 stripes each. |
| 170 | */ |
| 171 | #define BTRFS_SYSTEM_CHUNK_ARRAY_SIZE 2048 |
| 172 | |
| 173 | /* |
| 174 | * just in case we somehow lose the roots and are not able to mount, |
| 175 | * we store an array of the roots from previous transactions |
| 176 | * in the super. |
| 177 | */ |
| 178 | #define BTRFS_NUM_BACKUP_ROOTS 4 |
| 179 | struct btrfs_root_backup { |
| 180 | __le64 tree_root; |
| 181 | __le64 tree_root_gen; |
| 182 | |
| 183 | __le64 chunk_root; |
| 184 | __le64 chunk_root_gen; |
| 185 | |
| 186 | __le64 extent_root; |
| 187 | __le64 extent_root_gen; |
| 188 | |
| 189 | __le64 fs_root; |
| 190 | __le64 fs_root_gen; |
| 191 | |
| 192 | __le64 dev_root; |
| 193 | __le64 dev_root_gen; |
| 194 | |
| 195 | __le64 csum_root; |
| 196 | __le64 csum_root_gen; |
| 197 | |
| 198 | __le64 total_bytes; |
| 199 | __le64 bytes_used; |
| 200 | __le64 num_devices; |
| 201 | /* future */ |
| 202 | __le64 unused_64[4]; |
| 203 | |
| 204 | u8 tree_root_level; |
| 205 | u8 chunk_root_level; |
| 206 | u8 extent_root_level; |
| 207 | u8 fs_root_level; |
| 208 | u8 dev_root_level; |
| 209 | u8 csum_root_level; |
| 210 | /* future and to align */ |
| 211 | u8 unused_8[10]; |
| 212 | } __attribute__ ((__packed__)); |
| 213 | |
| 214 | /* |
| 215 | * the super block basically lists the main trees of the FS |
| 216 | * it currently lacks any block count etc etc |
| 217 | */ |
| 218 | struct btrfs_super_block { |
| 219 | /* the first 4 fields must match struct btrfs_header */ |
| 220 | u8 csum[BTRFS_CSUM_SIZE]; |
| 221 | /* FS specific UUID, visible to user */ |
| 222 | u8 fsid[BTRFS_FSID_SIZE]; |
| 223 | __le64 bytenr; /* this block number */ |
| 224 | __le64 flags; |
| 225 | |
| 226 | /* allowed to be different from the btrfs_header from here own down */ |
| 227 | __le64 magic; |
| 228 | __le64 generation; |
| 229 | __le64 root; |
| 230 | __le64 chunk_root; |
| 231 | __le64 log_root; |
| 232 | |
| 233 | /* this will help find the new super based on the log root */ |
| 234 | __le64 log_root_transid; |
| 235 | __le64 total_bytes; |
| 236 | __le64 bytes_used; |
| 237 | __le64 root_dir_objectid; |
| 238 | __le64 num_devices; |
| 239 | __le32 sectorsize; |
| 240 | __le32 nodesize; |
| 241 | __le32 __unused_leafsize; |
| 242 | __le32 stripesize; |
| 243 | __le32 sys_chunk_array_size; |
| 244 | __le64 chunk_root_generation; |
| 245 | __le64 compat_flags; |
| 246 | __le64 compat_ro_flags; |
| 247 | __le64 incompat_flags; |
| 248 | __le16 csum_type; |
| 249 | u8 root_level; |
| 250 | u8 chunk_root_level; |
| 251 | u8 log_root_level; |
| 252 | struct btrfs_dev_item dev_item; |
| 253 | |
| 254 | char label[BTRFS_LABEL_SIZE]; |
| 255 | |
| 256 | __le64 cache_generation; |
| 257 | __le64 uuid_tree_generation; |
| 258 | |
| 259 | /* the UUID written into btree blocks */ |
| 260 | u8 metadata_uuid[BTRFS_FSID_SIZE]; |
| 261 | |
| 262 | /* future expansion */ |
| 263 | __le64 reserved[28]; |
| 264 | u8 sys_chunk_array[BTRFS_SYSTEM_CHUNK_ARRAY_SIZE]; |
| 265 | struct btrfs_root_backup super_roots[BTRFS_NUM_BACKUP_ROOTS]; |
| 266 | } __attribute__ ((__packed__)); |
| 267 | |
| 268 | /* |
| 269 | * Compat flags that we support. If any incompat flags are set other than the |
| 270 | * ones specified below then we will fail to mount |
| 271 | */ |
| 272 | #define BTRFS_FEATURE_COMPAT_SUPP 0ULL |
| 273 | #define BTRFS_FEATURE_COMPAT_SAFE_SET 0ULL |
| 274 | #define BTRFS_FEATURE_COMPAT_SAFE_CLEAR 0ULL |
| 275 | |
| 276 | #define BTRFS_FEATURE_COMPAT_RO_SUPP \ |
| 277 | (BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE | \ |
| 278 | BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE_VALID) |
| 279 | |
| 280 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_SET 0ULL |
| 281 | #define BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR 0ULL |
| 282 | |
| 283 | #define BTRFS_FEATURE_INCOMPAT_SUPP \ |
| 284 | (BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF | \ |
| 285 | BTRFS_FEATURE_INCOMPAT_DEFAULT_SUBVOL | \ |
| 286 | BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \ |
| 287 | BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \ |
| 288 | BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \ |
| 289 | BTRFS_FEATURE_INCOMPAT_COMPRESS_ZSTD | \ |
| 290 | BTRFS_FEATURE_INCOMPAT_RAID56 | \ |
| 291 | BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF | \ |
| 292 | BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA | \ |
| 293 | BTRFS_FEATURE_INCOMPAT_NO_HOLES | \ |
| 294 | BTRFS_FEATURE_INCOMPAT_METADATA_UUID) |
| 295 | |
| 296 | #define BTRFS_FEATURE_INCOMPAT_SAFE_SET \ |
| 297 | (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF) |
| 298 | #define BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR 0ULL |
| 299 | |
| 300 | /* |
| 301 | * A leaf is full of items. offset and size tell us where to find |
| 302 | * the item in the leaf (relative to the start of the data area) |
| 303 | */ |
| 304 | struct btrfs_item { |
| 305 | struct btrfs_disk_key key; |
| 306 | __le32 offset; |
| 307 | __le32 size; |
| 308 | } __attribute__ ((__packed__)); |
| 309 | |
| 310 | /* |
| 311 | * leaves have an item area and a data area: |
| 312 | * [item0, item1....itemN] [free space] [dataN...data1, data0] |
| 313 | * |
| 314 | * The data is separate from the items to get the keys closer together |
| 315 | * during searches. |
| 316 | */ |
| 317 | struct btrfs_leaf { |
| 318 | struct btrfs_header header; |
| 319 | struct btrfs_item items[]; |
| 320 | } __attribute__ ((__packed__)); |
| 321 | |
| 322 | /* |
| 323 | * all non-leaf blocks are nodes, they hold only keys and pointers to |
| 324 | * other blocks |
| 325 | */ |
| 326 | struct btrfs_key_ptr { |
| 327 | struct btrfs_disk_key key; |
| 328 | __le64 blockptr; |
| 329 | __le64 generation; |
| 330 | } __attribute__ ((__packed__)); |
| 331 | |
| 332 | struct btrfs_node { |
| 333 | struct btrfs_header header; |
| 334 | struct btrfs_key_ptr ptrs[]; |
| 335 | } __attribute__ ((__packed__)); |
| 336 | |
| 337 | /* |
| 338 | * btrfs_paths remember the path taken from the root down to the leaf. |
| 339 | * level 0 is always the leaf, and nodes[1...BTRFS_MAX_LEVEL] will point |
| 340 | * to any other levels that are present. |
| 341 | * |
| 342 | * The slots array records the index of the item or block pointer |
| 343 | * used while walking the tree. |
| 344 | */ |
| 345 | enum { READA_NONE, READA_BACK, READA_FORWARD }; |
| 346 | struct btrfs_path { |
| 347 | struct extent_buffer *nodes[BTRFS_MAX_LEVEL]; |
| 348 | int slots[BTRFS_MAX_LEVEL]; |
| 349 | /* if there is real range locking, this locks field will change */ |
| 350 | u8 locks[BTRFS_MAX_LEVEL]; |
| 351 | u8 reada; |
| 352 | /* keep some upper locks as we walk down */ |
| 353 | u8 lowest_level; |
| 354 | |
| 355 | /* |
| 356 | * set by btrfs_split_item, tells search_slot to keep all locks |
| 357 | * and to force calls to keep space in the nodes |
| 358 | */ |
| 359 | unsigned int search_for_split:1; |
| 360 | unsigned int keep_locks:1; |
| 361 | unsigned int skip_locking:1; |
| 362 | unsigned int leave_spinning:1; |
| 363 | unsigned int search_commit_root:1; |
| 364 | unsigned int need_commit_sem:1; |
| 365 | unsigned int skip_release_on_error:1; |
| 366 | }; |
| 367 | #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \ |
| 368 | sizeof(struct btrfs_item)) |
| 369 | struct btrfs_dev_replace { |
| 370 | u64 replace_state; /* see #define above */ |
| 371 | time64_t time_started; /* seconds since 1-Jan-1970 */ |
| 372 | time64_t time_stopped; /* seconds since 1-Jan-1970 */ |
| 373 | atomic64_t num_write_errors; |
| 374 | atomic64_t num_uncorrectable_read_errors; |
| 375 | |
| 376 | u64 cursor_left; |
| 377 | u64 committed_cursor_left; |
| 378 | u64 cursor_left_last_write_of_item; |
| 379 | u64 cursor_right; |
| 380 | |
| 381 | u64 cont_reading_from_srcdev_mode; /* see #define above */ |
| 382 | |
| 383 | int is_valid; |
| 384 | int item_needs_writeback; |
| 385 | struct btrfs_device *srcdev; |
| 386 | struct btrfs_device *tgtdev; |
| 387 | |
| 388 | struct mutex lock_finishing_cancel_unmount; |
| 389 | struct rw_semaphore rwsem; |
| 390 | |
| 391 | struct btrfs_scrub_progress scrub_progress; |
| 392 | |
| 393 | struct percpu_counter bio_counter; |
| 394 | wait_queue_head_t replace_wait; |
| 395 | }; |
| 396 | |
| 397 | /* |
| 398 | * free clusters are used to claim free space in relatively large chunks, |
| 399 | * allowing us to do less seeky writes. They are used for all metadata |
| 400 | * allocations. In ssd_spread mode they are also used for data allocations. |
| 401 | */ |
| 402 | struct btrfs_free_cluster { |
| 403 | spinlock_t lock; |
| 404 | spinlock_t refill_lock; |
| 405 | struct rb_root root; |
| 406 | |
| 407 | /* largest extent in this cluster */ |
| 408 | u64 max_size; |
| 409 | |
| 410 | /* first extent starting offset */ |
| 411 | u64 window_start; |
| 412 | |
| 413 | /* We did a full search and couldn't create a cluster */ |
| 414 | bool fragmented; |
| 415 | |
| 416 | struct btrfs_block_group_cache *block_group; |
| 417 | /* |
| 418 | * when a cluster is allocated from a block group, we put the |
| 419 | * cluster onto a list in the block group so that it can |
| 420 | * be freed before the block group is freed. |
| 421 | */ |
| 422 | struct list_head block_group_list; |
| 423 | }; |
| 424 | |
| 425 | enum btrfs_caching_type { |
| 426 | BTRFS_CACHE_NO, |
| 427 | BTRFS_CACHE_STARTED, |
| 428 | BTRFS_CACHE_FAST, |
| 429 | BTRFS_CACHE_FINISHED, |
| 430 | BTRFS_CACHE_ERROR, |
| 431 | }; |
| 432 | |
| 433 | /* |
| 434 | * Tree to record all locked full stripes of a RAID5/6 block group |
| 435 | */ |
| 436 | struct btrfs_full_stripe_locks_tree { |
| 437 | struct rb_root root; |
| 438 | struct mutex lock; |
| 439 | }; |
| 440 | |
| 441 | /* delayed seq elem */ |
| 442 | struct seq_list { |
| 443 | struct list_head list; |
| 444 | u64 seq; |
| 445 | }; |
| 446 | |
| 447 | #define SEQ_LIST_INIT(name) { .list = LIST_HEAD_INIT((name).list), .seq = 0 } |
| 448 | |
| 449 | #define SEQ_LAST ((u64)-1) |
| 450 | |
| 451 | enum btrfs_orphan_cleanup_state { |
| 452 | ORPHAN_CLEANUP_STARTED = 1, |
| 453 | ORPHAN_CLEANUP_DONE = 2, |
| 454 | }; |
| 455 | |
| 456 | void btrfs_init_async_reclaim_work(struct work_struct *work); |
| 457 | |
| 458 | /* fs_info */ |
| 459 | struct reloc_control; |
| 460 | struct btrfs_device; |
| 461 | struct btrfs_fs_devices; |
| 462 | struct btrfs_balance_control; |
| 463 | struct btrfs_delayed_root; |
| 464 | |
| 465 | /* |
| 466 | * Block group or device which contains an active swapfile. Used for preventing |
| 467 | * unsafe operations while a swapfile is active. |
| 468 | * |
| 469 | * These are sorted on (ptr, inode) (note that a block group or device can |
| 470 | * contain more than one swapfile). We compare the pointer values because we |
| 471 | * don't actually care what the object is, we just need a quick check whether |
| 472 | * the object exists in the rbtree. |
| 473 | */ |
| 474 | struct btrfs_swapfile_pin { |
| 475 | struct rb_node node; |
| 476 | void *ptr; |
| 477 | struct inode *inode; |
| 478 | /* |
| 479 | * If true, ptr points to a struct btrfs_block_group_cache. Otherwise, |
| 480 | * ptr points to a struct btrfs_device. |
| 481 | */ |
| 482 | bool is_block_group; |
| 483 | }; |
| 484 | |
| 485 | bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr); |
| 486 | |
| 487 | enum { |
| 488 | BTRFS_FS_BARRIER, |
| 489 | BTRFS_FS_CLOSING_START, |
| 490 | BTRFS_FS_CLOSING_DONE, |
| 491 | BTRFS_FS_LOG_RECOVERING, |
| 492 | BTRFS_FS_OPEN, |
| 493 | BTRFS_FS_QUOTA_ENABLED, |
| 494 | BTRFS_FS_UPDATE_UUID_TREE_GEN, |
| 495 | BTRFS_FS_CREATING_FREE_SPACE_TREE, |
| 496 | BTRFS_FS_BTREE_ERR, |
| 497 | BTRFS_FS_LOG1_ERR, |
| 498 | BTRFS_FS_LOG2_ERR, |
| 499 | BTRFS_FS_QUOTA_OVERRIDE, |
| 500 | /* Used to record internally whether fs has been frozen */ |
| 501 | BTRFS_FS_FROZEN, |
| 502 | /* |
| 503 | * Indicate that a whole-filesystem exclusive operation is running |
| 504 | * (device replace, resize, device add/delete, balance) |
| 505 | */ |
| 506 | BTRFS_FS_EXCL_OP, |
| 507 | /* |
| 508 | * To info transaction_kthread we need an immediate commit so it |
| 509 | * doesn't need to wait for commit_interval |
| 510 | */ |
| 511 | BTRFS_FS_NEED_ASYNC_COMMIT, |
| 512 | /* |
| 513 | * Indicate that balance has been set up from the ioctl and is in the |
| 514 | * main phase. The fs_info::balance_ctl is initialized. |
| 515 | * Set and cleared while holding fs_info::balance_mutex. |
| 516 | */ |
| 517 | BTRFS_FS_BALANCE_RUNNING, |
| 518 | |
| 519 | /* Indicate that the cleaner thread is awake and doing something. */ |
| 520 | BTRFS_FS_CLEANER_RUNNING, |
| 521 | |
| 522 | /* |
| 523 | * The checksumming has an optimized version and is considered fast, |
| 524 | * so we don't need to offload checksums to workqueues. |
| 525 | */ |
| 526 | BTRFS_FS_CSUM_IMPL_FAST, |
| 527 | }; |
| 528 | |
| 529 | struct btrfs_fs_info { |
| 530 | u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; |
| 531 | unsigned long flags; |
| 532 | struct btrfs_root *extent_root; |
| 533 | struct btrfs_root *tree_root; |
| 534 | struct btrfs_root *chunk_root; |
| 535 | struct btrfs_root *dev_root; |
| 536 | struct btrfs_root *fs_root; |
| 537 | struct btrfs_root *csum_root; |
| 538 | struct btrfs_root *quota_root; |
| 539 | struct btrfs_root *uuid_root; |
| 540 | struct btrfs_root *free_space_root; |
| 541 | |
| 542 | /* the log root tree is a directory of all the other log roots */ |
| 543 | struct btrfs_root *log_root_tree; |
| 544 | |
| 545 | spinlock_t fs_roots_radix_lock; |
| 546 | struct radix_tree_root fs_roots_radix; |
| 547 | |
| 548 | /* block group cache stuff */ |
| 549 | spinlock_t block_group_cache_lock; |
| 550 | u64 first_logical_byte; |
| 551 | struct rb_root block_group_cache_tree; |
| 552 | |
| 553 | /* keep track of unallocated space */ |
| 554 | atomic64_t free_chunk_space; |
| 555 | |
| 556 | struct extent_io_tree freed_extents[2]; |
| 557 | struct extent_io_tree *pinned_extents; |
| 558 | |
| 559 | /* logical->physical extent mapping */ |
| 560 | struct extent_map_tree mapping_tree; |
| 561 | |
| 562 | /* |
| 563 | * block reservation for extent, checksum, root tree and |
| 564 | * delayed dir index item |
| 565 | */ |
| 566 | struct btrfs_block_rsv global_block_rsv; |
| 567 | /* block reservation for metadata operations */ |
| 568 | struct btrfs_block_rsv trans_block_rsv; |
| 569 | /* block reservation for chunk tree */ |
| 570 | struct btrfs_block_rsv chunk_block_rsv; |
| 571 | /* block reservation for delayed operations */ |
| 572 | struct btrfs_block_rsv delayed_block_rsv; |
| 573 | /* block reservation for delayed refs */ |
| 574 | struct btrfs_block_rsv delayed_refs_rsv; |
| 575 | |
| 576 | struct btrfs_block_rsv empty_block_rsv; |
| 577 | |
| 578 | u64 generation; |
| 579 | u64 last_trans_committed; |
| 580 | u64 avg_delayed_ref_runtime; |
| 581 | |
| 582 | /* |
| 583 | * this is updated to the current trans every time a full commit |
| 584 | * is required instead of the faster short fsync log commits |
| 585 | */ |
| 586 | u64 last_trans_log_full_commit; |
| 587 | unsigned long mount_opt; |
| 588 | /* |
| 589 | * Track requests for actions that need to be done during transaction |
| 590 | * commit (like for some mount options). |
| 591 | */ |
| 592 | unsigned long pending_changes; |
| 593 | unsigned long compress_type:4; |
| 594 | unsigned int compress_level; |
| 595 | u32 commit_interval; |
| 596 | /* |
| 597 | * It is a suggestive number, the read side is safe even it gets a |
| 598 | * wrong number because we will write out the data into a regular |
| 599 | * extent. The write side(mount/remount) is under ->s_umount lock, |
| 600 | * so it is also safe. |
| 601 | */ |
| 602 | u64 max_inline; |
| 603 | |
| 604 | struct btrfs_transaction *running_transaction; |
| 605 | wait_queue_head_t transaction_throttle; |
| 606 | wait_queue_head_t transaction_wait; |
| 607 | wait_queue_head_t transaction_blocked_wait; |
| 608 | wait_queue_head_t async_submit_wait; |
| 609 | |
| 610 | /* |
| 611 | * Used to protect the incompat_flags, compat_flags, compat_ro_flags |
| 612 | * when they are updated. |
| 613 | * |
| 614 | * Because we do not clear the flags for ever, so we needn't use |
| 615 | * the lock on the read side. |
| 616 | * |
| 617 | * We also needn't use the lock when we mount the fs, because |
| 618 | * there is no other task which will update the flag. |
| 619 | */ |
| 620 | spinlock_t super_lock; |
| 621 | struct btrfs_super_block *super_copy; |
| 622 | struct btrfs_super_block *super_for_commit; |
| 623 | struct super_block *sb; |
| 624 | struct inode *btree_inode; |
| 625 | struct mutex tree_log_mutex; |
| 626 | struct mutex transaction_kthread_mutex; |
| 627 | struct mutex cleaner_mutex; |
| 628 | struct mutex chunk_mutex; |
| 629 | |
| 630 | /* |
| 631 | * this is taken to make sure we don't set block groups ro after |
| 632 | * the free space cache has been allocated on them |
| 633 | */ |
| 634 | struct mutex ro_block_group_mutex; |
| 635 | |
| 636 | /* this is used during read/modify/write to make sure |
| 637 | * no two ios are trying to mod the same stripe at the same |
| 638 | * time |
| 639 | */ |
| 640 | struct btrfs_stripe_hash_table *stripe_hash_table; |
| 641 | |
| 642 | /* |
| 643 | * this protects the ordered operations list only while we are |
| 644 | * processing all of the entries on it. This way we make |
| 645 | * sure the commit code doesn't find the list temporarily empty |
| 646 | * because another function happens to be doing non-waiting preflush |
| 647 | * before jumping into the main commit. |
| 648 | */ |
| 649 | struct mutex ordered_operations_mutex; |
| 650 | |
| 651 | struct rw_semaphore commit_root_sem; |
| 652 | |
| 653 | struct rw_semaphore cleanup_work_sem; |
| 654 | |
| 655 | struct rw_semaphore subvol_sem; |
| 656 | struct srcu_struct subvol_srcu; |
| 657 | |
| 658 | spinlock_t trans_lock; |
| 659 | /* |
| 660 | * the reloc mutex goes with the trans lock, it is taken |
| 661 | * during commit to protect us from the relocation code |
| 662 | */ |
| 663 | struct mutex reloc_mutex; |
| 664 | |
| 665 | struct list_head trans_list; |
| 666 | struct list_head dead_roots; |
| 667 | struct list_head caching_block_groups; |
| 668 | |
| 669 | spinlock_t delayed_iput_lock; |
| 670 | struct list_head delayed_iputs; |
| 671 | atomic_t nr_delayed_iputs; |
| 672 | wait_queue_head_t delayed_iputs_wait; |
| 673 | |
| 674 | /* this protects tree_mod_seq_list */ |
| 675 | spinlock_t tree_mod_seq_lock; |
| 676 | atomic64_t tree_mod_seq; |
| 677 | struct list_head tree_mod_seq_list; |
| 678 | |
| 679 | /* this protects tree_mod_log */ |
| 680 | rwlock_t tree_mod_log_lock; |
| 681 | struct rb_root tree_mod_log; |
| 682 | |
| 683 | atomic_t async_delalloc_pages; |
| 684 | |
| 685 | /* |
| 686 | * this is used to protect the following list -- ordered_roots. |
| 687 | */ |
| 688 | spinlock_t ordered_root_lock; |
| 689 | |
| 690 | /* |
| 691 | * all fs/file tree roots in which there are data=ordered extents |
| 692 | * pending writeback are added into this list. |
| 693 | * |
| 694 | * these can span multiple transactions and basically include |
| 695 | * every dirty data page that isn't from nodatacow |
| 696 | */ |
| 697 | struct list_head ordered_roots; |
| 698 | |
| 699 | struct mutex delalloc_root_mutex; |
| 700 | spinlock_t delalloc_root_lock; |
| 701 | /* all fs/file tree roots that have delalloc inodes. */ |
| 702 | struct list_head delalloc_roots; |
| 703 | |
| 704 | /* |
| 705 | * there is a pool of worker threads for checksumming during writes |
| 706 | * and a pool for checksumming after reads. This is because readers |
| 707 | * can run with FS locks held, and the writers may be waiting for |
| 708 | * those locks. We don't want ordering in the pending list to cause |
| 709 | * deadlocks, and so the two are serviced separately. |
| 710 | * |
| 711 | * A third pool does submit_bio to avoid deadlocking with the other |
| 712 | * two |
| 713 | */ |
| 714 | struct btrfs_workqueue *workers; |
| 715 | struct btrfs_workqueue *delalloc_workers; |
| 716 | struct btrfs_workqueue *flush_workers; |
| 717 | struct btrfs_workqueue *endio_workers; |
| 718 | struct btrfs_workqueue *endio_meta_workers; |
| 719 | struct btrfs_workqueue *endio_raid56_workers; |
| 720 | struct btrfs_workqueue *endio_repair_workers; |
| 721 | struct btrfs_workqueue *rmw_workers; |
| 722 | struct btrfs_workqueue *endio_meta_write_workers; |
| 723 | struct btrfs_workqueue *endio_write_workers; |
| 724 | struct btrfs_workqueue *endio_freespace_worker; |
| 725 | struct btrfs_workqueue *submit_workers; |
| 726 | struct btrfs_workqueue *caching_workers; |
| 727 | struct btrfs_workqueue *readahead_workers; |
| 728 | |
| 729 | /* |
| 730 | * fixup workers take dirty pages that didn't properly go through |
| 731 | * the cow mechanism and make them safe to write. It happens |
| 732 | * for the sys_munmap function call path |
| 733 | */ |
| 734 | struct btrfs_workqueue *fixup_workers; |
| 735 | struct btrfs_workqueue *delayed_workers; |
| 736 | |
| 737 | /* the extent workers do delayed refs on the extent allocation tree */ |
| 738 | struct btrfs_workqueue *extent_workers; |
| 739 | struct task_struct *transaction_kthread; |
| 740 | struct task_struct *cleaner_kthread; |
| 741 | u32 thread_pool_size; |
| 742 | |
| 743 | struct kobject *space_info_kobj; |
| 744 | |
| 745 | u64 total_pinned; |
| 746 | |
| 747 | /* used to keep from writing metadata until there is a nice batch */ |
| 748 | struct percpu_counter dirty_metadata_bytes; |
| 749 | struct percpu_counter delalloc_bytes; |
| 750 | struct percpu_counter dio_bytes; |
| 751 | s32 dirty_metadata_batch; |
| 752 | s32 delalloc_batch; |
| 753 | |
| 754 | struct list_head dirty_cowonly_roots; |
| 755 | |
| 756 | struct btrfs_fs_devices *fs_devices; |
| 757 | |
| 758 | /* |
| 759 | * The space_info list is effectively read only after initial |
| 760 | * setup. It is populated at mount time and cleaned up after |
| 761 | * all block groups are removed. RCU is used to protect it. |
| 762 | */ |
| 763 | struct list_head space_info; |
| 764 | |
| 765 | struct btrfs_space_info *data_sinfo; |
| 766 | |
| 767 | struct reloc_control *reloc_ctl; |
| 768 | |
| 769 | /* data_alloc_cluster is only used in ssd_spread mode */ |
| 770 | struct btrfs_free_cluster data_alloc_cluster; |
| 771 | |
| 772 | /* all metadata allocations go through this cluster */ |
| 773 | struct btrfs_free_cluster meta_alloc_cluster; |
| 774 | |
| 775 | /* auto defrag inodes go here */ |
| 776 | spinlock_t defrag_inodes_lock; |
| 777 | struct rb_root defrag_inodes; |
| 778 | atomic_t defrag_running; |
| 779 | |
| 780 | /* Used to protect avail_{data, metadata, system}_alloc_bits */ |
| 781 | seqlock_t profiles_lock; |
| 782 | /* |
| 783 | * these three are in extended format (availability of single |
| 784 | * chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other |
| 785 | * types are denoted by corresponding BTRFS_BLOCK_GROUP_* bits) |
| 786 | */ |
| 787 | u64 avail_data_alloc_bits; |
| 788 | u64 avail_metadata_alloc_bits; |
| 789 | u64 avail_system_alloc_bits; |
| 790 | |
| 791 | /* restriper state */ |
| 792 | spinlock_t balance_lock; |
| 793 | struct mutex balance_mutex; |
| 794 | atomic_t balance_pause_req; |
| 795 | atomic_t balance_cancel_req; |
| 796 | struct btrfs_balance_control *balance_ctl; |
| 797 | wait_queue_head_t balance_wait_q; |
| 798 | |
| 799 | u32 data_chunk_allocations; |
| 800 | u32 metadata_ratio; |
| 801 | |
| 802 | void *bdev_holder; |
| 803 | |
| 804 | /* private scrub information */ |
| 805 | struct mutex scrub_lock; |
| 806 | atomic_t scrubs_running; |
| 807 | atomic_t scrub_pause_req; |
| 808 | atomic_t scrubs_paused; |
| 809 | atomic_t scrub_cancel_req; |
| 810 | wait_queue_head_t scrub_pause_wait; |
| 811 | /* |
| 812 | * The worker pointers are NULL iff the refcount is 0, ie. scrub is not |
| 813 | * running. |
| 814 | */ |
| 815 | refcount_t scrub_workers_refcnt; |
| 816 | struct btrfs_workqueue *scrub_workers; |
| 817 | struct btrfs_workqueue *scrub_wr_completion_workers; |
| 818 | struct btrfs_workqueue *scrub_parity_workers; |
| 819 | |
| 820 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
| 821 | u32 check_integrity_print_mask; |
| 822 | #endif |
| 823 | /* is qgroup tracking in a consistent state? */ |
| 824 | u64 qgroup_flags; |
| 825 | |
| 826 | /* holds configuration and tracking. Protected by qgroup_lock */ |
| 827 | struct rb_root qgroup_tree; |
| 828 | spinlock_t qgroup_lock; |
| 829 | |
| 830 | /* |
| 831 | * used to avoid frequently calling ulist_alloc()/ulist_free() |
| 832 | * when doing qgroup accounting, it must be protected by qgroup_lock. |
| 833 | */ |
| 834 | struct ulist *qgroup_ulist; |
| 835 | |
| 836 | /* protect user change for quota operations */ |
| 837 | struct mutex qgroup_ioctl_lock; |
| 838 | |
| 839 | /* list of dirty qgroups to be written at next commit */ |
| 840 | struct list_head dirty_qgroups; |
| 841 | |
| 842 | /* used by qgroup for an efficient tree traversal */ |
| 843 | u64 qgroup_seq; |
| 844 | |
| 845 | /* qgroup rescan items */ |
| 846 | struct mutex qgroup_rescan_lock; /* protects the progress item */ |
| 847 | struct btrfs_key qgroup_rescan_progress; |
| 848 | struct btrfs_workqueue *qgroup_rescan_workers; |
| 849 | struct completion qgroup_rescan_completion; |
| 850 | struct btrfs_work qgroup_rescan_work; |
| 851 | bool qgroup_rescan_running; /* protected by qgroup_rescan_lock */ |
| 852 | |
| 853 | /* filesystem state */ |
| 854 | unsigned long fs_state; |
| 855 | |
| 856 | struct btrfs_delayed_root *delayed_root; |
| 857 | |
| 858 | /* readahead tree */ |
| 859 | spinlock_t reada_lock; |
| 860 | struct radix_tree_root reada_tree; |
| 861 | |
| 862 | /* readahead works cnt */ |
| 863 | atomic_t reada_works_cnt; |
| 864 | |
| 865 | /* Extent buffer radix tree */ |
| 866 | spinlock_t buffer_lock; |
| 867 | struct radix_tree_root buffer_radix; |
| 868 | |
| 869 | /* next backup root to be overwritten */ |
| 870 | int backup_root_index; |
| 871 | |
| 872 | /* device replace state */ |
| 873 | struct btrfs_dev_replace dev_replace; |
| 874 | |
| 875 | struct semaphore uuid_tree_rescan_sem; |
| 876 | |
| 877 | /* Used to reclaim the metadata space in the background. */ |
| 878 | struct work_struct async_reclaim_work; |
| 879 | |
| 880 | spinlock_t unused_bgs_lock; |
| 881 | struct list_head unused_bgs; |
| 882 | struct mutex unused_bg_unpin_mutex; |
| 883 | struct mutex delete_unused_bgs_mutex; |
| 884 | |
| 885 | /* Cached block sizes */ |
| 886 | u32 nodesize; |
| 887 | u32 sectorsize; |
| 888 | u32 stripesize; |
| 889 | |
| 890 | /* Block groups and devices containing active swapfiles. */ |
| 891 | spinlock_t swapfile_pins_lock; |
| 892 | struct rb_root swapfile_pins; |
| 893 | |
| 894 | struct crypto_shash *csum_shash; |
| 895 | |
| 896 | /* |
| 897 | * Number of send operations in progress. |
| 898 | * Updated while holding fs_info::balance_mutex. |
| 899 | */ |
| 900 | int send_in_progress; |
| 901 | |
| 902 | #ifdef CONFIG_BTRFS_FS_REF_VERIFY |
| 903 | spinlock_t ref_verify_lock; |
| 904 | struct rb_root block_tree; |
| 905 | #endif |
| 906 | }; |
| 907 | |
| 908 | static inline struct btrfs_fs_info *btrfs_sb(struct super_block *sb) |
| 909 | { |
| 910 | return sb->s_fs_info; |
| 911 | } |
| 912 | |
| 913 | struct btrfs_subvolume_writers { |
| 914 | struct percpu_counter counter; |
| 915 | wait_queue_head_t wait; |
| 916 | }; |
| 917 | |
| 918 | /* |
| 919 | * The state of btrfs root |
| 920 | */ |
| 921 | enum { |
| 922 | /* |
| 923 | * btrfs_record_root_in_trans is a multi-step process, and it can race |
| 924 | * with the balancing code. But the race is very small, and only the |
| 925 | * first time the root is added to each transaction. So IN_TRANS_SETUP |
| 926 | * is used to tell us when more checks are required |
| 927 | */ |
| 928 | BTRFS_ROOT_IN_TRANS_SETUP, |
| 929 | BTRFS_ROOT_REF_COWS, |
| 930 | BTRFS_ROOT_TRACK_DIRTY, |
| 931 | BTRFS_ROOT_IN_RADIX, |
| 932 | BTRFS_ROOT_ORPHAN_ITEM_INSERTED, |
| 933 | BTRFS_ROOT_DEFRAG_RUNNING, |
| 934 | BTRFS_ROOT_FORCE_COW, |
| 935 | BTRFS_ROOT_MULTI_LOG_TASKS, |
| 936 | BTRFS_ROOT_DIRTY, |
| 937 | BTRFS_ROOT_DELETING, |
| 938 | |
| 939 | /* |
| 940 | * Reloc tree is orphan, only kept here for qgroup delayed subtree scan |
| 941 | * |
| 942 | * Set for the subvolume tree owning the reloc tree. |
| 943 | */ |
| 944 | BTRFS_ROOT_DEAD_RELOC_TREE, |
| 945 | /* Mark dead root stored on device whose cleanup needs to be resumed */ |
| 946 | BTRFS_ROOT_DEAD_TREE, |
| 947 | }; |
| 948 | |
| 949 | /* |
| 950 | * Record swapped tree blocks of a subvolume tree for delayed subtree trace |
| 951 | * code. For detail check comment in fs/btrfs/qgroup.c. |
| 952 | */ |
| 953 | struct btrfs_qgroup_swapped_blocks { |
| 954 | spinlock_t lock; |
| 955 | /* RM_EMPTY_ROOT() of above blocks[] */ |
| 956 | bool swapped; |
| 957 | struct rb_root blocks[BTRFS_MAX_LEVEL]; |
| 958 | }; |
| 959 | |
| 960 | /* |
| 961 | * in ram representation of the tree. extent_root is used for all allocations |
| 962 | * and for the extent tree extent_root root. |
| 963 | */ |
| 964 | struct btrfs_root { |
| 965 | struct extent_buffer *node; |
| 966 | |
| 967 | struct extent_buffer *commit_root; |
| 968 | struct btrfs_root *log_root; |
| 969 | struct btrfs_root *reloc_root; |
| 970 | |
| 971 | unsigned long state; |
| 972 | struct btrfs_root_item root_item; |
| 973 | struct btrfs_key root_key; |
| 974 | struct btrfs_fs_info *fs_info; |
| 975 | struct extent_io_tree dirty_log_pages; |
| 976 | |
| 977 | struct mutex objectid_mutex; |
| 978 | |
| 979 | spinlock_t accounting_lock; |
| 980 | struct btrfs_block_rsv *block_rsv; |
| 981 | |
| 982 | /* free ino cache stuff */ |
| 983 | struct btrfs_free_space_ctl *free_ino_ctl; |
| 984 | enum btrfs_caching_type ino_cache_state; |
| 985 | spinlock_t ino_cache_lock; |
| 986 | wait_queue_head_t ino_cache_wait; |
| 987 | struct btrfs_free_space_ctl *free_ino_pinned; |
| 988 | u64 ino_cache_progress; |
| 989 | struct inode *ino_cache_inode; |
| 990 | |
| 991 | struct mutex log_mutex; |
| 992 | wait_queue_head_t log_writer_wait; |
| 993 | wait_queue_head_t log_commit_wait[2]; |
| 994 | struct list_head log_ctxs[2]; |
| 995 | atomic_t log_writers; |
| 996 | atomic_t log_commit[2]; |
| 997 | atomic_t log_batch; |
| 998 | int log_transid; |
| 999 | /* No matter the commit succeeds or not*/ |
| 1000 | int log_transid_committed; |
| 1001 | /* Just be updated when the commit succeeds. */ |
| 1002 | int last_log_commit; |
| 1003 | pid_t log_start_pid; |
| 1004 | |
| 1005 | u64 last_trans; |
| 1006 | |
| 1007 | u32 type; |
| 1008 | |
| 1009 | u64 highest_objectid; |
| 1010 | |
| 1011 | u64 defrag_trans_start; |
| 1012 | struct btrfs_key defrag_progress; |
| 1013 | struct btrfs_key defrag_max; |
| 1014 | |
| 1015 | /* the dirty list is only used by non-reference counted roots */ |
| 1016 | struct list_head dirty_list; |
| 1017 | |
| 1018 | struct list_head root_list; |
| 1019 | |
| 1020 | spinlock_t log_extents_lock[2]; |
| 1021 | struct list_head logged_list[2]; |
| 1022 | |
| 1023 | int orphan_cleanup_state; |
| 1024 | |
| 1025 | spinlock_t inode_lock; |
| 1026 | /* red-black tree that keeps track of in-memory inodes */ |
| 1027 | struct rb_root inode_tree; |
| 1028 | |
| 1029 | /* |
| 1030 | * radix tree that keeps track of delayed nodes of every inode, |
| 1031 | * protected by inode_lock |
| 1032 | */ |
| 1033 | struct radix_tree_root delayed_nodes_tree; |
| 1034 | /* |
| 1035 | * right now this just gets used so that a root has its own devid |
| 1036 | * for stat. It may be used for more later |
| 1037 | */ |
| 1038 | dev_t anon_dev; |
| 1039 | |
| 1040 | spinlock_t root_item_lock; |
| 1041 | refcount_t refs; |
| 1042 | |
| 1043 | struct mutex delalloc_mutex; |
| 1044 | spinlock_t delalloc_lock; |
| 1045 | /* |
| 1046 | * all of the inodes that have delalloc bytes. It is possible for |
| 1047 | * this list to be empty even when there is still dirty data=ordered |
| 1048 | * extents waiting to finish IO. |
| 1049 | */ |
| 1050 | struct list_head delalloc_inodes; |
| 1051 | struct list_head delalloc_root; |
| 1052 | u64 nr_delalloc_inodes; |
| 1053 | |
| 1054 | struct mutex ordered_extent_mutex; |
| 1055 | /* |
| 1056 | * this is used by the balancing code to wait for all the pending |
| 1057 | * ordered extents |
| 1058 | */ |
| 1059 | spinlock_t ordered_extent_lock; |
| 1060 | |
| 1061 | /* |
| 1062 | * all of the data=ordered extents pending writeback |
| 1063 | * these can span multiple transactions and basically include |
| 1064 | * every dirty data page that isn't from nodatacow |
| 1065 | */ |
| 1066 | struct list_head ordered_extents; |
| 1067 | struct list_head ordered_root; |
| 1068 | u64 nr_ordered_extents; |
| 1069 | |
| 1070 | /* |
| 1071 | * Not empty if this subvolume root has gone through tree block swap |
| 1072 | * (relocation) |
| 1073 | * |
| 1074 | * Will be used by reloc_control::dirty_subvol_roots. |
| 1075 | */ |
| 1076 | struct list_head reloc_dirty_list; |
| 1077 | |
| 1078 | /* |
| 1079 | * Number of currently running SEND ioctls to prevent |
| 1080 | * manipulation with the read-only status via SUBVOL_SETFLAGS |
| 1081 | */ |
| 1082 | int send_in_progress; |
| 1083 | /* |
| 1084 | * Number of currently running deduplication operations that have a |
| 1085 | * destination inode belonging to this root. Protected by the lock |
| 1086 | * root_item_lock. |
| 1087 | */ |
| 1088 | int dedupe_in_progress; |
| 1089 | struct btrfs_subvolume_writers *subv_writers; |
| 1090 | atomic_t will_be_snapshotted; |
| 1091 | atomic_t snapshot_force_cow; |
| 1092 | |
| 1093 | /* For qgroup metadata reserved space */ |
| 1094 | spinlock_t qgroup_meta_rsv_lock; |
| 1095 | u64 qgroup_meta_rsv_pertrans; |
| 1096 | u64 qgroup_meta_rsv_prealloc; |
| 1097 | |
| 1098 | /* Number of active swapfiles */ |
| 1099 | atomic_t nr_swapfiles; |
| 1100 | |
| 1101 | /* Record pairs of swapped blocks for qgroup */ |
| 1102 | struct btrfs_qgroup_swapped_blocks swapped_blocks; |
| 1103 | |
| 1104 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 1105 | u64 alloc_bytenr; |
| 1106 | #endif |
| 1107 | }; |
| 1108 | |
| 1109 | struct btrfs_clone_extent_info { |
| 1110 | u64 disk_offset; |
| 1111 | u64 disk_len; |
| 1112 | u64 data_offset; |
| 1113 | u64 data_len; |
| 1114 | u64 file_offset; |
| 1115 | char *extent_buf; |
| 1116 | u32 item_size; |
| 1117 | }; |
| 1118 | |
| 1119 | struct btrfs_file_private { |
| 1120 | void *filldir_buf; |
| 1121 | }; |
| 1122 | |
| 1123 | static inline u32 btrfs_inode_sectorsize(const struct inode *inode) |
| 1124 | { |
| 1125 | return btrfs_sb(inode->i_sb)->sectorsize; |
| 1126 | } |
| 1127 | |
| 1128 | static inline u32 BTRFS_LEAF_DATA_SIZE(const struct btrfs_fs_info *info) |
| 1129 | { |
| 1130 | |
| 1131 | return info->nodesize - sizeof(struct btrfs_header); |
| 1132 | } |
| 1133 | |
| 1134 | #define BTRFS_LEAF_DATA_OFFSET offsetof(struct btrfs_leaf, items) |
| 1135 | |
| 1136 | static inline u32 BTRFS_MAX_ITEM_SIZE(const struct btrfs_fs_info *info) |
| 1137 | { |
| 1138 | return BTRFS_LEAF_DATA_SIZE(info) - sizeof(struct btrfs_item); |
| 1139 | } |
| 1140 | |
| 1141 | static inline u32 BTRFS_NODEPTRS_PER_BLOCK(const struct btrfs_fs_info *info) |
| 1142 | { |
| 1143 | return BTRFS_LEAF_DATA_SIZE(info) / sizeof(struct btrfs_key_ptr); |
| 1144 | } |
| 1145 | |
| 1146 | #define BTRFS_FILE_EXTENT_INLINE_DATA_START \ |
| 1147 | (offsetof(struct btrfs_file_extent_item, disk_bytenr)) |
| 1148 | static inline u32 BTRFS_MAX_INLINE_DATA_SIZE(const struct btrfs_fs_info *info) |
| 1149 | { |
| 1150 | return BTRFS_MAX_ITEM_SIZE(info) - |
| 1151 | BTRFS_FILE_EXTENT_INLINE_DATA_START; |
| 1152 | } |
| 1153 | |
| 1154 | static inline u32 BTRFS_MAX_XATTR_SIZE(const struct btrfs_fs_info *info) |
| 1155 | { |
| 1156 | return BTRFS_MAX_ITEM_SIZE(info) - sizeof(struct btrfs_dir_item); |
| 1157 | } |
| 1158 | |
| 1159 | /* |
| 1160 | * Flags for mount options. |
| 1161 | * |
| 1162 | * Note: don't forget to add new options to btrfs_show_options() |
| 1163 | */ |
| 1164 | #define BTRFS_MOUNT_NODATASUM (1 << 0) |
| 1165 | #define BTRFS_MOUNT_NODATACOW (1 << 1) |
| 1166 | #define BTRFS_MOUNT_NOBARRIER (1 << 2) |
| 1167 | #define BTRFS_MOUNT_SSD (1 << 3) |
| 1168 | #define BTRFS_MOUNT_DEGRADED (1 << 4) |
| 1169 | #define BTRFS_MOUNT_COMPRESS (1 << 5) |
| 1170 | #define BTRFS_MOUNT_NOTREELOG (1 << 6) |
| 1171 | #define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) |
| 1172 | #define BTRFS_MOUNT_SSD_SPREAD (1 << 8) |
| 1173 | #define BTRFS_MOUNT_NOSSD (1 << 9) |
| 1174 | #define BTRFS_MOUNT_DISCARD (1 << 10) |
| 1175 | #define BTRFS_MOUNT_FORCE_COMPRESS (1 << 11) |
| 1176 | #define BTRFS_MOUNT_SPACE_CACHE (1 << 12) |
| 1177 | #define BTRFS_MOUNT_CLEAR_CACHE (1 << 13) |
| 1178 | #define BTRFS_MOUNT_USER_SUBVOL_RM_ALLOWED (1 << 14) |
| 1179 | #define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15) |
| 1180 | #define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16) |
| 1181 | #define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17) |
| 1182 | #define BTRFS_MOUNT_USEBACKUPROOT (1 << 18) |
| 1183 | #define BTRFS_MOUNT_SKIP_BALANCE (1 << 19) |
| 1184 | #define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20) |
| 1185 | #define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21) |
| 1186 | #define BTRFS_MOUNT_PANIC_ON_FATAL_ERROR (1 << 22) |
| 1187 | #define BTRFS_MOUNT_RESCAN_UUID_TREE (1 << 23) |
| 1188 | #define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24) |
| 1189 | #define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25) |
| 1190 | #define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26) |
| 1191 | #define BTRFS_MOUNT_NOLOGREPLAY (1 << 27) |
| 1192 | #define BTRFS_MOUNT_REF_VERIFY (1 << 28) |
| 1193 | |
| 1194 | #define BTRFS_DEFAULT_COMMIT_INTERVAL (30) |
| 1195 | #define BTRFS_DEFAULT_MAX_INLINE (2048) |
| 1196 | |
| 1197 | #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) |
| 1198 | #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) |
| 1199 | #define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt) |
| 1200 | #define btrfs_test_opt(fs_info, opt) ((fs_info)->mount_opt & \ |
| 1201 | BTRFS_MOUNT_##opt) |
| 1202 | |
| 1203 | #define btrfs_set_and_info(fs_info, opt, fmt, args...) \ |
| 1204 | { \ |
| 1205 | if (!btrfs_test_opt(fs_info, opt)) \ |
| 1206 | btrfs_info(fs_info, fmt, ##args); \ |
| 1207 | btrfs_set_opt(fs_info->mount_opt, opt); \ |
| 1208 | } |
| 1209 | |
| 1210 | #define btrfs_clear_and_info(fs_info, opt, fmt, args...) \ |
| 1211 | { \ |
| 1212 | if (btrfs_test_opt(fs_info, opt)) \ |
| 1213 | btrfs_info(fs_info, fmt, ##args); \ |
| 1214 | btrfs_clear_opt(fs_info->mount_opt, opt); \ |
| 1215 | } |
| 1216 | |
| 1217 | /* |
| 1218 | * Requests for changes that need to be done during transaction commit. |
| 1219 | * |
| 1220 | * Internal mount options that are used for special handling of the real |
| 1221 | * mount options (eg. cannot be set during remount and have to be set during |
| 1222 | * transaction commit) |
| 1223 | */ |
| 1224 | |
| 1225 | #define BTRFS_PENDING_SET_INODE_MAP_CACHE (0) |
| 1226 | #define BTRFS_PENDING_CLEAR_INODE_MAP_CACHE (1) |
| 1227 | #define BTRFS_PENDING_COMMIT (2) |
| 1228 | |
| 1229 | #define btrfs_test_pending(info, opt) \ |
| 1230 | test_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) |
| 1231 | #define btrfs_set_pending(info, opt) \ |
| 1232 | set_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) |
| 1233 | #define btrfs_clear_pending(info, opt) \ |
| 1234 | clear_bit(BTRFS_PENDING_##opt, &(info)->pending_changes) |
| 1235 | |
| 1236 | /* |
| 1237 | * Helpers for setting pending mount option changes. |
| 1238 | * |
| 1239 | * Expects corresponding macros |
| 1240 | * BTRFS_PENDING_SET_ and CLEAR_ + short mount option name |
| 1241 | */ |
| 1242 | #define btrfs_set_pending_and_info(info, opt, fmt, args...) \ |
| 1243 | do { \ |
| 1244 | if (!btrfs_raw_test_opt((info)->mount_opt, opt)) { \ |
| 1245 | btrfs_info((info), fmt, ##args); \ |
| 1246 | btrfs_set_pending((info), SET_##opt); \ |
| 1247 | btrfs_clear_pending((info), CLEAR_##opt); \ |
| 1248 | } \ |
| 1249 | } while(0) |
| 1250 | |
| 1251 | #define btrfs_clear_pending_and_info(info, opt, fmt, args...) \ |
| 1252 | do { \ |
| 1253 | if (btrfs_raw_test_opt((info)->mount_opt, opt)) { \ |
| 1254 | btrfs_info((info), fmt, ##args); \ |
| 1255 | btrfs_set_pending((info), CLEAR_##opt); \ |
| 1256 | btrfs_clear_pending((info), SET_##opt); \ |
| 1257 | } \ |
| 1258 | } while(0) |
| 1259 | |
| 1260 | /* |
| 1261 | * Inode flags |
| 1262 | */ |
| 1263 | #define BTRFS_INODE_NODATASUM (1 << 0) |
| 1264 | #define BTRFS_INODE_NODATACOW (1 << 1) |
| 1265 | #define BTRFS_INODE_READONLY (1 << 2) |
| 1266 | #define BTRFS_INODE_NOCOMPRESS (1 << 3) |
| 1267 | #define BTRFS_INODE_PREALLOC (1 << 4) |
| 1268 | #define BTRFS_INODE_SYNC (1 << 5) |
| 1269 | #define BTRFS_INODE_IMMUTABLE (1 << 6) |
| 1270 | #define BTRFS_INODE_APPEND (1 << 7) |
| 1271 | #define BTRFS_INODE_NODUMP (1 << 8) |
| 1272 | #define BTRFS_INODE_NOATIME (1 << 9) |
| 1273 | #define BTRFS_INODE_DIRSYNC (1 << 10) |
| 1274 | #define BTRFS_INODE_COMPRESS (1 << 11) |
| 1275 | |
| 1276 | #define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31) |
| 1277 | |
| 1278 | #define BTRFS_INODE_FLAG_MASK \ |
| 1279 | (BTRFS_INODE_NODATASUM | \ |
| 1280 | BTRFS_INODE_NODATACOW | \ |
| 1281 | BTRFS_INODE_READONLY | \ |
| 1282 | BTRFS_INODE_NOCOMPRESS | \ |
| 1283 | BTRFS_INODE_PREALLOC | \ |
| 1284 | BTRFS_INODE_SYNC | \ |
| 1285 | BTRFS_INODE_IMMUTABLE | \ |
| 1286 | BTRFS_INODE_APPEND | \ |
| 1287 | BTRFS_INODE_NODUMP | \ |
| 1288 | BTRFS_INODE_NOATIME | \ |
| 1289 | BTRFS_INODE_DIRSYNC | \ |
| 1290 | BTRFS_INODE_COMPRESS | \ |
| 1291 | BTRFS_INODE_ROOT_ITEM_INIT) |
| 1292 | |
| 1293 | struct btrfs_map_token { |
| 1294 | const struct extent_buffer *eb; |
| 1295 | char *kaddr; |
| 1296 | unsigned long offset; |
| 1297 | }; |
| 1298 | |
| 1299 | #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \ |
| 1300 | ((bytes) >> (fs_info)->sb->s_blocksize_bits) |
| 1301 | |
| 1302 | static inline void btrfs_init_map_token(struct btrfs_map_token *token, |
| 1303 | struct extent_buffer *eb) |
| 1304 | { |
| 1305 | token->eb = eb; |
| 1306 | token->kaddr = NULL; |
| 1307 | } |
| 1308 | |
| 1309 | /* some macros to generate set/get functions for the struct fields. This |
| 1310 | * assumes there is a lefoo_to_cpu for every type, so lets make a simple |
| 1311 | * one for u8: |
| 1312 | */ |
| 1313 | #define le8_to_cpu(v) (v) |
| 1314 | #define cpu_to_le8(v) (v) |
| 1315 | #define __le8 u8 |
| 1316 | |
| 1317 | #define read_eb_member(eb, ptr, type, member, result) (\ |
| 1318 | read_extent_buffer(eb, (char *)(result), \ |
| 1319 | ((unsigned long)(ptr)) + \ |
| 1320 | offsetof(type, member), \ |
| 1321 | sizeof(((type *)0)->member))) |
| 1322 | |
| 1323 | #define write_eb_member(eb, ptr, type, member, result) (\ |
| 1324 | write_extent_buffer(eb, (char *)(result), \ |
| 1325 | ((unsigned long)(ptr)) + \ |
| 1326 | offsetof(type, member), \ |
| 1327 | sizeof(((type *)0)->member))) |
| 1328 | |
| 1329 | #define DECLARE_BTRFS_SETGET_BITS(bits) \ |
| 1330 | u##bits btrfs_get_token_##bits(const struct extent_buffer *eb, \ |
| 1331 | const void *ptr, unsigned long off, \ |
| 1332 | struct btrfs_map_token *token); \ |
| 1333 | void btrfs_set_token_##bits(struct extent_buffer *eb, const void *ptr, \ |
| 1334 | unsigned long off, u##bits val, \ |
| 1335 | struct btrfs_map_token *token); \ |
| 1336 | u##bits btrfs_get_##bits(const struct extent_buffer *eb, \ |
| 1337 | const void *ptr, unsigned long off); \ |
| 1338 | void btrfs_set_##bits(struct extent_buffer *eb, void *ptr, \ |
| 1339 | unsigned long off, u##bits val); |
| 1340 | |
| 1341 | DECLARE_BTRFS_SETGET_BITS(8) |
| 1342 | DECLARE_BTRFS_SETGET_BITS(16) |
| 1343 | DECLARE_BTRFS_SETGET_BITS(32) |
| 1344 | DECLARE_BTRFS_SETGET_BITS(64) |
| 1345 | |
| 1346 | #define BTRFS_SETGET_FUNCS(name, type, member, bits) \ |
| 1347 | static inline u##bits btrfs_##name(const struct extent_buffer *eb, \ |
| 1348 | const type *s) \ |
| 1349 | { \ |
| 1350 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| 1351 | return btrfs_get_##bits(eb, s, offsetof(type, member)); \ |
| 1352 | } \ |
| 1353 | static inline void btrfs_set_##name(struct extent_buffer *eb, type *s, \ |
| 1354 | u##bits val) \ |
| 1355 | { \ |
| 1356 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| 1357 | btrfs_set_##bits(eb, s, offsetof(type, member), val); \ |
| 1358 | } \ |
| 1359 | static inline u##bits btrfs_token_##name(const struct extent_buffer *eb,\ |
| 1360 | const type *s, \ |
| 1361 | struct btrfs_map_token *token) \ |
| 1362 | { \ |
| 1363 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| 1364 | return btrfs_get_token_##bits(eb, s, offsetof(type, member), token); \ |
| 1365 | } \ |
| 1366 | static inline void btrfs_set_token_##name(struct extent_buffer *eb, \ |
| 1367 | type *s, u##bits val, \ |
| 1368 | struct btrfs_map_token *token) \ |
| 1369 | { \ |
| 1370 | BUILD_BUG_ON(sizeof(u##bits) != sizeof(((type *)0))->member); \ |
| 1371 | btrfs_set_token_##bits(eb, s, offsetof(type, member), val, token); \ |
| 1372 | } |
| 1373 | |
| 1374 | #define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \ |
| 1375 | static inline u##bits btrfs_##name(const struct extent_buffer *eb) \ |
| 1376 | { \ |
| 1377 | const type *p = page_address(eb->pages[0]); \ |
| 1378 | u##bits res = le##bits##_to_cpu(p->member); \ |
| 1379 | return res; \ |
| 1380 | } \ |
| 1381 | static inline void btrfs_set_##name(struct extent_buffer *eb, \ |
| 1382 | u##bits val) \ |
| 1383 | { \ |
| 1384 | type *p = page_address(eb->pages[0]); \ |
| 1385 | p->member = cpu_to_le##bits(val); \ |
| 1386 | } |
| 1387 | |
| 1388 | #define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ |
| 1389 | static inline u##bits btrfs_##name(const type *s) \ |
| 1390 | { \ |
| 1391 | return le##bits##_to_cpu(s->member); \ |
| 1392 | } \ |
| 1393 | static inline void btrfs_set_##name(type *s, u##bits val) \ |
| 1394 | { \ |
| 1395 | s->member = cpu_to_le##bits(val); \ |
| 1396 | } |
| 1397 | |
| 1398 | |
| 1399 | static inline u64 btrfs_device_total_bytes(struct extent_buffer *eb, |
| 1400 | struct btrfs_dev_item *s) |
| 1401 | { |
| 1402 | BUILD_BUG_ON(sizeof(u64) != |
| 1403 | sizeof(((struct btrfs_dev_item *)0))->total_bytes); |
| 1404 | return btrfs_get_64(eb, s, offsetof(struct btrfs_dev_item, |
| 1405 | total_bytes)); |
| 1406 | } |
| 1407 | static inline void btrfs_set_device_total_bytes(struct extent_buffer *eb, |
| 1408 | struct btrfs_dev_item *s, |
| 1409 | u64 val) |
| 1410 | { |
| 1411 | BUILD_BUG_ON(sizeof(u64) != |
| 1412 | sizeof(((struct btrfs_dev_item *)0))->total_bytes); |
| 1413 | WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize)); |
| 1414 | btrfs_set_64(eb, s, offsetof(struct btrfs_dev_item, total_bytes), val); |
| 1415 | } |
| 1416 | |
| 1417 | |
| 1418 | BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64); |
| 1419 | BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64); |
| 1420 | BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32); |
| 1421 | BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32); |
| 1422 | BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, |
| 1423 | start_offset, 64); |
| 1424 | BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32); |
| 1425 | BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64); |
| 1426 | BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32); |
| 1427 | BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8); |
| 1428 | BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8); |
| 1429 | BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64); |
| 1430 | |
| 1431 | BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64); |
| 1432 | BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item, |
| 1433 | total_bytes, 64); |
| 1434 | BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item, |
| 1435 | bytes_used, 64); |
| 1436 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item, |
| 1437 | io_align, 32); |
| 1438 | BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item, |
| 1439 | io_width, 32); |
| 1440 | BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item, |
| 1441 | sector_size, 32); |
| 1442 | BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64); |
| 1443 | BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, |
| 1444 | dev_group, 32); |
| 1445 | BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item, |
| 1446 | seek_speed, 8); |
| 1447 | BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item, |
| 1448 | bandwidth, 8); |
| 1449 | BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item, |
| 1450 | generation, 64); |
| 1451 | |
| 1452 | static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d) |
| 1453 | { |
| 1454 | return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid); |
| 1455 | } |
| 1456 | |
| 1457 | static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d) |
| 1458 | { |
| 1459 | return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid); |
| 1460 | } |
| 1461 | |
| 1462 | BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64); |
| 1463 | BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64); |
| 1464 | BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64); |
| 1465 | BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32); |
| 1466 | BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32); |
| 1467 | BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32); |
| 1468 | BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64); |
| 1469 | BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16); |
| 1470 | BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16); |
| 1471 | BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64); |
| 1472 | BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64); |
| 1473 | |
| 1474 | static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s) |
| 1475 | { |
| 1476 | return (char *)s + offsetof(struct btrfs_stripe, dev_uuid); |
| 1477 | } |
| 1478 | |
| 1479 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64); |
| 1480 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64); |
| 1481 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk, |
| 1482 | stripe_len, 64); |
| 1483 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, |
| 1484 | io_align, 32); |
| 1485 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, |
| 1486 | io_width, 32); |
| 1487 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk, |
| 1488 | sector_size, 32); |
| 1489 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64); |
| 1490 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk, |
| 1491 | num_stripes, 16); |
| 1492 | BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk, |
| 1493 | sub_stripes, 16); |
| 1494 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64); |
| 1495 | BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64); |
| 1496 | |
| 1497 | static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, |
| 1498 | int nr) |
| 1499 | { |
| 1500 | unsigned long offset = (unsigned long)c; |
| 1501 | offset += offsetof(struct btrfs_chunk, stripe); |
| 1502 | offset += nr * sizeof(struct btrfs_stripe); |
| 1503 | return (struct btrfs_stripe *)offset; |
| 1504 | } |
| 1505 | |
| 1506 | static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr) |
| 1507 | { |
| 1508 | return btrfs_stripe_dev_uuid(btrfs_stripe_nr(c, nr)); |
| 1509 | } |
| 1510 | |
| 1511 | static inline u64 btrfs_stripe_offset_nr(struct extent_buffer *eb, |
| 1512 | struct btrfs_chunk *c, int nr) |
| 1513 | { |
| 1514 | return btrfs_stripe_offset(eb, btrfs_stripe_nr(c, nr)); |
| 1515 | } |
| 1516 | |
| 1517 | static inline u64 btrfs_stripe_devid_nr(struct extent_buffer *eb, |
| 1518 | struct btrfs_chunk *c, int nr) |
| 1519 | { |
| 1520 | return btrfs_stripe_devid(eb, btrfs_stripe_nr(c, nr)); |
| 1521 | } |
| 1522 | |
| 1523 | /* struct btrfs_block_group_item */ |
| 1524 | BTRFS_SETGET_STACK_FUNCS(block_group_used, struct btrfs_block_group_item, |
| 1525 | used, 64); |
| 1526 | BTRFS_SETGET_FUNCS(disk_block_group_used, struct btrfs_block_group_item, |
| 1527 | used, 64); |
| 1528 | BTRFS_SETGET_STACK_FUNCS(block_group_chunk_objectid, |
| 1529 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 1530 | |
| 1531 | BTRFS_SETGET_FUNCS(disk_block_group_chunk_objectid, |
| 1532 | struct btrfs_block_group_item, chunk_objectid, 64); |
| 1533 | BTRFS_SETGET_FUNCS(disk_block_group_flags, |
| 1534 | struct btrfs_block_group_item, flags, 64); |
| 1535 | BTRFS_SETGET_STACK_FUNCS(block_group_flags, |
| 1536 | struct btrfs_block_group_item, flags, 64); |
| 1537 | |
| 1538 | /* struct btrfs_free_space_info */ |
| 1539 | BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info, |
| 1540 | extent_count, 32); |
| 1541 | BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32); |
| 1542 | |
| 1543 | /* struct btrfs_inode_ref */ |
| 1544 | BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16); |
| 1545 | BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64); |
| 1546 | |
| 1547 | /* struct btrfs_inode_extref */ |
| 1548 | BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref, |
| 1549 | parent_objectid, 64); |
| 1550 | BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref, |
| 1551 | name_len, 16); |
| 1552 | BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64); |
| 1553 | |
| 1554 | /* struct btrfs_inode_item */ |
| 1555 | BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64); |
| 1556 | BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64); |
| 1557 | BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64); |
| 1558 | BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64); |
| 1559 | BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64); |
| 1560 | BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64); |
| 1561 | BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 1562 | BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32); |
| 1563 | BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32); |
| 1564 | BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32); |
| 1565 | BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64); |
| 1566 | BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64); |
| 1567 | BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item, |
| 1568 | generation, 64); |
| 1569 | BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item, |
| 1570 | sequence, 64); |
| 1571 | BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item, |
| 1572 | transid, 64); |
| 1573 | BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64); |
| 1574 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, |
| 1575 | nbytes, 64); |
| 1576 | BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item, |
| 1577 | block_group, 64); |
| 1578 | BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32); |
| 1579 | BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32); |
| 1580 | BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32); |
| 1581 | BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32); |
| 1582 | BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64); |
| 1583 | BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64); |
| 1584 | BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64); |
| 1585 | BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32); |
| 1586 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64); |
| 1587 | BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32); |
| 1588 | |
| 1589 | /* struct btrfs_dev_extent */ |
| 1590 | BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, |
| 1591 | chunk_tree, 64); |
| 1592 | BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent, |
| 1593 | chunk_objectid, 64); |
| 1594 | BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent, |
| 1595 | chunk_offset, 64); |
| 1596 | BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64); |
| 1597 | |
| 1598 | static inline unsigned long btrfs_dev_extent_chunk_tree_uuid(struct btrfs_dev_extent *dev) |
| 1599 | { |
| 1600 | unsigned long ptr = offsetof(struct btrfs_dev_extent, chunk_tree_uuid); |
| 1601 | return (unsigned long)dev + ptr; |
| 1602 | } |
| 1603 | |
| 1604 | BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64); |
| 1605 | BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, |
| 1606 | generation, 64); |
| 1607 | BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64); |
| 1608 | |
| 1609 | BTRFS_SETGET_FUNCS(extent_refs_v0, struct btrfs_extent_item_v0, refs, 32); |
| 1610 | |
| 1611 | |
| 1612 | BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8); |
| 1613 | |
| 1614 | static inline void btrfs_tree_block_key(struct extent_buffer *eb, |
| 1615 | struct btrfs_tree_block_info *item, |
| 1616 | struct btrfs_disk_key *key) |
| 1617 | { |
| 1618 | read_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1619 | } |
| 1620 | |
| 1621 | static inline void btrfs_set_tree_block_key(struct extent_buffer *eb, |
| 1622 | struct btrfs_tree_block_info *item, |
| 1623 | struct btrfs_disk_key *key) |
| 1624 | { |
| 1625 | write_eb_member(eb, item, struct btrfs_tree_block_info, key, key); |
| 1626 | } |
| 1627 | |
| 1628 | BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, |
| 1629 | root, 64); |
| 1630 | BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref, |
| 1631 | objectid, 64); |
| 1632 | BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref, |
| 1633 | offset, 64); |
| 1634 | BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, |
| 1635 | count, 32); |
| 1636 | |
| 1637 | BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, |
| 1638 | count, 32); |
| 1639 | |
| 1640 | BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, |
| 1641 | type, 8); |
| 1642 | BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, |
| 1643 | offset, 64); |
| 1644 | |
| 1645 | static inline u32 btrfs_extent_inline_ref_size(int type) |
| 1646 | { |
| 1647 | if (type == BTRFS_TREE_BLOCK_REF_KEY || |
| 1648 | type == BTRFS_SHARED_BLOCK_REF_KEY) |
| 1649 | return sizeof(struct btrfs_extent_inline_ref); |
| 1650 | if (type == BTRFS_SHARED_DATA_REF_KEY) |
| 1651 | return sizeof(struct btrfs_shared_data_ref) + |
| 1652 | sizeof(struct btrfs_extent_inline_ref); |
| 1653 | if (type == BTRFS_EXTENT_DATA_REF_KEY) |
| 1654 | return sizeof(struct btrfs_extent_data_ref) + |
| 1655 | offsetof(struct btrfs_extent_inline_ref, offset); |
| 1656 | return 0; |
| 1657 | } |
| 1658 | |
| 1659 | BTRFS_SETGET_FUNCS(ref_root_v0, struct btrfs_extent_ref_v0, root, 64); |
| 1660 | BTRFS_SETGET_FUNCS(ref_generation_v0, struct btrfs_extent_ref_v0, |
| 1661 | generation, 64); |
| 1662 | BTRFS_SETGET_FUNCS(ref_objectid_v0, struct btrfs_extent_ref_v0, objectid, 64); |
| 1663 | BTRFS_SETGET_FUNCS(ref_count_v0, struct btrfs_extent_ref_v0, count, 32); |
| 1664 | |
| 1665 | /* struct btrfs_node */ |
| 1666 | BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64); |
| 1667 | BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64); |
| 1668 | BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, |
| 1669 | blockptr, 64); |
| 1670 | BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr, |
| 1671 | generation, 64); |
| 1672 | |
| 1673 | static inline u64 btrfs_node_blockptr(struct extent_buffer *eb, int nr) |
| 1674 | { |
| 1675 | unsigned long ptr; |
| 1676 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1677 | sizeof(struct btrfs_key_ptr) * nr; |
| 1678 | return btrfs_key_blockptr(eb, (struct btrfs_key_ptr *)ptr); |
| 1679 | } |
| 1680 | |
| 1681 | static inline void btrfs_set_node_blockptr(struct extent_buffer *eb, |
| 1682 | int nr, u64 val) |
| 1683 | { |
| 1684 | unsigned long ptr; |
| 1685 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1686 | sizeof(struct btrfs_key_ptr) * nr; |
| 1687 | btrfs_set_key_blockptr(eb, (struct btrfs_key_ptr *)ptr, val); |
| 1688 | } |
| 1689 | |
| 1690 | static inline u64 btrfs_node_ptr_generation(struct extent_buffer *eb, int nr) |
| 1691 | { |
| 1692 | unsigned long ptr; |
| 1693 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1694 | sizeof(struct btrfs_key_ptr) * nr; |
| 1695 | return btrfs_key_generation(eb, (struct btrfs_key_ptr *)ptr); |
| 1696 | } |
| 1697 | |
| 1698 | static inline void btrfs_set_node_ptr_generation(struct extent_buffer *eb, |
| 1699 | int nr, u64 val) |
| 1700 | { |
| 1701 | unsigned long ptr; |
| 1702 | ptr = offsetof(struct btrfs_node, ptrs) + |
| 1703 | sizeof(struct btrfs_key_ptr) * nr; |
| 1704 | btrfs_set_key_generation(eb, (struct btrfs_key_ptr *)ptr, val); |
| 1705 | } |
| 1706 | |
| 1707 | static inline unsigned long btrfs_node_key_ptr_offset(int nr) |
| 1708 | { |
| 1709 | return offsetof(struct btrfs_node, ptrs) + |
| 1710 | sizeof(struct btrfs_key_ptr) * nr; |
| 1711 | } |
| 1712 | |
| 1713 | void btrfs_node_key(const struct extent_buffer *eb, |
| 1714 | struct btrfs_disk_key *disk_key, int nr); |
| 1715 | |
| 1716 | static inline void btrfs_set_node_key(struct extent_buffer *eb, |
| 1717 | struct btrfs_disk_key *disk_key, int nr) |
| 1718 | { |
| 1719 | unsigned long ptr; |
| 1720 | ptr = btrfs_node_key_ptr_offset(nr); |
| 1721 | write_eb_member(eb, (struct btrfs_key_ptr *)ptr, |
| 1722 | struct btrfs_key_ptr, key, disk_key); |
| 1723 | } |
| 1724 | |
| 1725 | /* struct btrfs_item */ |
| 1726 | BTRFS_SETGET_FUNCS(item_offset, struct btrfs_item, offset, 32); |
| 1727 | BTRFS_SETGET_FUNCS(item_size, struct btrfs_item, size, 32); |
| 1728 | BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32); |
| 1729 | BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32); |
| 1730 | |
| 1731 | static inline unsigned long btrfs_item_nr_offset(int nr) |
| 1732 | { |
| 1733 | return offsetof(struct btrfs_leaf, items) + |
| 1734 | sizeof(struct btrfs_item) * nr; |
| 1735 | } |
| 1736 | |
| 1737 | static inline struct btrfs_item *btrfs_item_nr(int nr) |
| 1738 | { |
| 1739 | return (struct btrfs_item *)btrfs_item_nr_offset(nr); |
| 1740 | } |
| 1741 | |
| 1742 | static inline u32 btrfs_item_end(const struct extent_buffer *eb, |
| 1743 | struct btrfs_item *item) |
| 1744 | { |
| 1745 | return btrfs_item_offset(eb, item) + btrfs_item_size(eb, item); |
| 1746 | } |
| 1747 | |
| 1748 | static inline u32 btrfs_item_end_nr(const struct extent_buffer *eb, int nr) |
| 1749 | { |
| 1750 | return btrfs_item_end(eb, btrfs_item_nr(nr)); |
| 1751 | } |
| 1752 | |
| 1753 | static inline u32 btrfs_item_offset_nr(const struct extent_buffer *eb, int nr) |
| 1754 | { |
| 1755 | return btrfs_item_offset(eb, btrfs_item_nr(nr)); |
| 1756 | } |
| 1757 | |
| 1758 | static inline u32 btrfs_item_size_nr(const struct extent_buffer *eb, int nr) |
| 1759 | { |
| 1760 | return btrfs_item_size(eb, btrfs_item_nr(nr)); |
| 1761 | } |
| 1762 | |
| 1763 | static inline void btrfs_item_key(const struct extent_buffer *eb, |
| 1764 | struct btrfs_disk_key *disk_key, int nr) |
| 1765 | { |
| 1766 | struct btrfs_item *item = btrfs_item_nr(nr); |
| 1767 | read_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| 1768 | } |
| 1769 | |
| 1770 | static inline void btrfs_set_item_key(struct extent_buffer *eb, |
| 1771 | struct btrfs_disk_key *disk_key, int nr) |
| 1772 | { |
| 1773 | struct btrfs_item *item = btrfs_item_nr(nr); |
| 1774 | write_eb_member(eb, item, struct btrfs_item, key, disk_key); |
| 1775 | } |
| 1776 | |
| 1777 | BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64); |
| 1778 | |
| 1779 | /* |
| 1780 | * struct btrfs_root_ref |
| 1781 | */ |
| 1782 | BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64); |
| 1783 | BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64); |
| 1784 | BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16); |
| 1785 | |
| 1786 | /* struct btrfs_dir_item */ |
| 1787 | BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16); |
| 1788 | BTRFS_SETGET_FUNCS(dir_type, struct btrfs_dir_item, type, 8); |
| 1789 | BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16); |
| 1790 | BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64); |
| 1791 | BTRFS_SETGET_STACK_FUNCS(stack_dir_type, struct btrfs_dir_item, type, 8); |
| 1792 | BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, |
| 1793 | data_len, 16); |
| 1794 | BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, |
| 1795 | name_len, 16); |
| 1796 | BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, |
| 1797 | transid, 64); |
| 1798 | |
| 1799 | static inline void btrfs_dir_item_key(const struct extent_buffer *eb, |
| 1800 | const struct btrfs_dir_item *item, |
| 1801 | struct btrfs_disk_key *key) |
| 1802 | { |
| 1803 | read_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| 1804 | } |
| 1805 | |
| 1806 | static inline void btrfs_set_dir_item_key(struct extent_buffer *eb, |
| 1807 | struct btrfs_dir_item *item, |
| 1808 | const struct btrfs_disk_key *key) |
| 1809 | { |
| 1810 | write_eb_member(eb, item, struct btrfs_dir_item, location, key); |
| 1811 | } |
| 1812 | |
| 1813 | BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header, |
| 1814 | num_entries, 64); |
| 1815 | BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header, |
| 1816 | num_bitmaps, 64); |
| 1817 | BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header, |
| 1818 | generation, 64); |
| 1819 | |
| 1820 | static inline void btrfs_free_space_key(const struct extent_buffer *eb, |
| 1821 | const struct btrfs_free_space_header *h, |
| 1822 | struct btrfs_disk_key *key) |
| 1823 | { |
| 1824 | read_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 1825 | } |
| 1826 | |
| 1827 | static inline void btrfs_set_free_space_key(struct extent_buffer *eb, |
| 1828 | struct btrfs_free_space_header *h, |
| 1829 | const struct btrfs_disk_key *key) |
| 1830 | { |
| 1831 | write_eb_member(eb, h, struct btrfs_free_space_header, location, key); |
| 1832 | } |
| 1833 | |
| 1834 | /* struct btrfs_disk_key */ |
| 1835 | BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, |
| 1836 | objectid, 64); |
| 1837 | BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64); |
| 1838 | BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8); |
| 1839 | |
| 1840 | static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu, |
| 1841 | const struct btrfs_disk_key *disk) |
| 1842 | { |
| 1843 | cpu->offset = le64_to_cpu(disk->offset); |
| 1844 | cpu->type = disk->type; |
| 1845 | cpu->objectid = le64_to_cpu(disk->objectid); |
| 1846 | } |
| 1847 | |
| 1848 | static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk, |
| 1849 | const struct btrfs_key *cpu) |
| 1850 | { |
| 1851 | disk->offset = cpu_to_le64(cpu->offset); |
| 1852 | disk->type = cpu->type; |
| 1853 | disk->objectid = cpu_to_le64(cpu->objectid); |
| 1854 | } |
| 1855 | |
| 1856 | static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb, |
| 1857 | struct btrfs_key *key, int nr) |
| 1858 | { |
| 1859 | struct btrfs_disk_key disk_key; |
| 1860 | btrfs_node_key(eb, &disk_key, nr); |
| 1861 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1862 | } |
| 1863 | |
| 1864 | static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb, |
| 1865 | struct btrfs_key *key, int nr) |
| 1866 | { |
| 1867 | struct btrfs_disk_key disk_key; |
| 1868 | btrfs_item_key(eb, &disk_key, nr); |
| 1869 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1870 | } |
| 1871 | |
| 1872 | static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb, |
| 1873 | const struct btrfs_dir_item *item, |
| 1874 | struct btrfs_key *key) |
| 1875 | { |
| 1876 | struct btrfs_disk_key disk_key; |
| 1877 | btrfs_dir_item_key(eb, item, &disk_key); |
| 1878 | btrfs_disk_key_to_cpu(key, &disk_key); |
| 1879 | } |
| 1880 | |
| 1881 | /* struct btrfs_header */ |
| 1882 | BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64); |
| 1883 | BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, |
| 1884 | generation, 64); |
| 1885 | BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64); |
| 1886 | BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32); |
| 1887 | BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64); |
| 1888 | BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8); |
| 1889 | BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header, |
| 1890 | generation, 64); |
| 1891 | BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64); |
| 1892 | BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, |
| 1893 | nritems, 32); |
| 1894 | BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64); |
| 1895 | |
| 1896 | static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag) |
| 1897 | { |
| 1898 | return (btrfs_header_flags(eb) & flag) == flag; |
| 1899 | } |
| 1900 | |
| 1901 | static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag) |
| 1902 | { |
| 1903 | u64 flags = btrfs_header_flags(eb); |
| 1904 | btrfs_set_header_flags(eb, flags | flag); |
| 1905 | } |
| 1906 | |
| 1907 | static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag) |
| 1908 | { |
| 1909 | u64 flags = btrfs_header_flags(eb); |
| 1910 | btrfs_set_header_flags(eb, flags & ~flag); |
| 1911 | } |
| 1912 | |
| 1913 | static inline int btrfs_header_backref_rev(const struct extent_buffer *eb) |
| 1914 | { |
| 1915 | u64 flags = btrfs_header_flags(eb); |
| 1916 | return flags >> BTRFS_BACKREF_REV_SHIFT; |
| 1917 | } |
| 1918 | |
| 1919 | static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, |
| 1920 | int rev) |
| 1921 | { |
| 1922 | u64 flags = btrfs_header_flags(eb); |
| 1923 | flags &= ~BTRFS_BACKREF_REV_MASK; |
| 1924 | flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT; |
| 1925 | btrfs_set_header_flags(eb, flags); |
| 1926 | } |
| 1927 | |
| 1928 | static inline unsigned long btrfs_header_fsid(void) |
| 1929 | { |
| 1930 | return offsetof(struct btrfs_header, fsid); |
| 1931 | } |
| 1932 | |
| 1933 | static inline unsigned long btrfs_header_chunk_tree_uuid(const struct extent_buffer *eb) |
| 1934 | { |
| 1935 | return offsetof(struct btrfs_header, chunk_tree_uuid); |
| 1936 | } |
| 1937 | |
| 1938 | static inline int btrfs_is_leaf(const struct extent_buffer *eb) |
| 1939 | { |
| 1940 | return btrfs_header_level(eb) == 0; |
| 1941 | } |
| 1942 | |
| 1943 | /* struct btrfs_root_item */ |
| 1944 | BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, |
| 1945 | generation, 64); |
| 1946 | BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32); |
| 1947 | BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1948 | BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8); |
| 1949 | |
| 1950 | BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, |
| 1951 | generation, 64); |
| 1952 | BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64); |
| 1953 | BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8); |
| 1954 | BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64); |
| 1955 | BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32); |
| 1956 | BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64); |
| 1957 | BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64); |
| 1958 | BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64); |
| 1959 | BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item, |
| 1960 | last_snapshot, 64); |
| 1961 | BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item, |
| 1962 | generation_v2, 64); |
| 1963 | BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, |
| 1964 | ctransid, 64); |
| 1965 | BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, |
| 1966 | otransid, 64); |
| 1967 | BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, |
| 1968 | stransid, 64); |
| 1969 | BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, |
| 1970 | rtransid, 64); |
| 1971 | |
| 1972 | static inline bool btrfs_root_readonly(const struct btrfs_root *root) |
| 1973 | { |
| 1974 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_RDONLY)) != 0; |
| 1975 | } |
| 1976 | |
| 1977 | static inline bool btrfs_root_dead(const struct btrfs_root *root) |
| 1978 | { |
| 1979 | return (root->root_item.flags & cpu_to_le64(BTRFS_ROOT_SUBVOL_DEAD)) != 0; |
| 1980 | } |
| 1981 | |
| 1982 | /* struct btrfs_root_backup */ |
| 1983 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup, |
| 1984 | tree_root, 64); |
| 1985 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup, |
| 1986 | tree_root_gen, 64); |
| 1987 | BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup, |
| 1988 | tree_root_level, 8); |
| 1989 | |
| 1990 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup, |
| 1991 | chunk_root, 64); |
| 1992 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup, |
| 1993 | chunk_root_gen, 64); |
| 1994 | BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup, |
| 1995 | chunk_root_level, 8); |
| 1996 | |
| 1997 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup, |
| 1998 | extent_root, 64); |
| 1999 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup, |
| 2000 | extent_root_gen, 64); |
| 2001 | BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup, |
| 2002 | extent_root_level, 8); |
| 2003 | |
| 2004 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup, |
| 2005 | fs_root, 64); |
| 2006 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup, |
| 2007 | fs_root_gen, 64); |
| 2008 | BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup, |
| 2009 | fs_root_level, 8); |
| 2010 | |
| 2011 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup, |
| 2012 | dev_root, 64); |
| 2013 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup, |
| 2014 | dev_root_gen, 64); |
| 2015 | BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup, |
| 2016 | dev_root_level, 8); |
| 2017 | |
| 2018 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup, |
| 2019 | csum_root, 64); |
| 2020 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup, |
| 2021 | csum_root_gen, 64); |
| 2022 | BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup, |
| 2023 | csum_root_level, 8); |
| 2024 | BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup, |
| 2025 | total_bytes, 64); |
| 2026 | BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup, |
| 2027 | bytes_used, 64); |
| 2028 | BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup, |
| 2029 | num_devices, 64); |
| 2030 | |
| 2031 | /* struct btrfs_balance_item */ |
| 2032 | BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64); |
| 2033 | |
| 2034 | static inline void btrfs_balance_data(const struct extent_buffer *eb, |
| 2035 | const struct btrfs_balance_item *bi, |
| 2036 | struct btrfs_disk_balance_args *ba) |
| 2037 | { |
| 2038 | read_eb_member(eb, bi, struct btrfs_balance_item, data, ba); |
| 2039 | } |
| 2040 | |
| 2041 | static inline void btrfs_set_balance_data(struct extent_buffer *eb, |
| 2042 | struct btrfs_balance_item *bi, |
| 2043 | const struct btrfs_disk_balance_args *ba) |
| 2044 | { |
| 2045 | write_eb_member(eb, bi, struct btrfs_balance_item, data, ba); |
| 2046 | } |
| 2047 | |
| 2048 | static inline void btrfs_balance_meta(const struct extent_buffer *eb, |
| 2049 | const struct btrfs_balance_item *bi, |
| 2050 | struct btrfs_disk_balance_args *ba) |
| 2051 | { |
| 2052 | read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); |
| 2053 | } |
| 2054 | |
| 2055 | static inline void btrfs_set_balance_meta(struct extent_buffer *eb, |
| 2056 | struct btrfs_balance_item *bi, |
| 2057 | const struct btrfs_disk_balance_args *ba) |
| 2058 | { |
| 2059 | write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba); |
| 2060 | } |
| 2061 | |
| 2062 | static inline void btrfs_balance_sys(const struct extent_buffer *eb, |
| 2063 | const struct btrfs_balance_item *bi, |
| 2064 | struct btrfs_disk_balance_args *ba) |
| 2065 | { |
| 2066 | read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); |
| 2067 | } |
| 2068 | |
| 2069 | static inline void btrfs_set_balance_sys(struct extent_buffer *eb, |
| 2070 | struct btrfs_balance_item *bi, |
| 2071 | const struct btrfs_disk_balance_args *ba) |
| 2072 | { |
| 2073 | write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba); |
| 2074 | } |
| 2075 | |
| 2076 | static inline void |
| 2077 | btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu, |
| 2078 | const struct btrfs_disk_balance_args *disk) |
| 2079 | { |
| 2080 | memset(cpu, 0, sizeof(*cpu)); |
| 2081 | |
| 2082 | cpu->profiles = le64_to_cpu(disk->profiles); |
| 2083 | cpu->usage = le64_to_cpu(disk->usage); |
| 2084 | cpu->devid = le64_to_cpu(disk->devid); |
| 2085 | cpu->pstart = le64_to_cpu(disk->pstart); |
| 2086 | cpu->pend = le64_to_cpu(disk->pend); |
| 2087 | cpu->vstart = le64_to_cpu(disk->vstart); |
| 2088 | cpu->vend = le64_to_cpu(disk->vend); |
| 2089 | cpu->target = le64_to_cpu(disk->target); |
| 2090 | cpu->flags = le64_to_cpu(disk->flags); |
| 2091 | cpu->limit = le64_to_cpu(disk->limit); |
| 2092 | cpu->stripes_min = le32_to_cpu(disk->stripes_min); |
| 2093 | cpu->stripes_max = le32_to_cpu(disk->stripes_max); |
| 2094 | } |
| 2095 | |
| 2096 | static inline void |
| 2097 | btrfs_cpu_balance_args_to_disk(struct btrfs_disk_balance_args *disk, |
| 2098 | const struct btrfs_balance_args *cpu) |
| 2099 | { |
| 2100 | memset(disk, 0, sizeof(*disk)); |
| 2101 | |
| 2102 | disk->profiles = cpu_to_le64(cpu->profiles); |
| 2103 | disk->usage = cpu_to_le64(cpu->usage); |
| 2104 | disk->devid = cpu_to_le64(cpu->devid); |
| 2105 | disk->pstart = cpu_to_le64(cpu->pstart); |
| 2106 | disk->pend = cpu_to_le64(cpu->pend); |
| 2107 | disk->vstart = cpu_to_le64(cpu->vstart); |
| 2108 | disk->vend = cpu_to_le64(cpu->vend); |
| 2109 | disk->target = cpu_to_le64(cpu->target); |
| 2110 | disk->flags = cpu_to_le64(cpu->flags); |
| 2111 | disk->limit = cpu_to_le64(cpu->limit); |
| 2112 | disk->stripes_min = cpu_to_le32(cpu->stripes_min); |
| 2113 | disk->stripes_max = cpu_to_le32(cpu->stripes_max); |
| 2114 | } |
| 2115 | |
| 2116 | /* struct btrfs_super_block */ |
| 2117 | BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64); |
| 2118 | BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64); |
| 2119 | BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block, |
| 2120 | generation, 64); |
| 2121 | BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64); |
| 2122 | BTRFS_SETGET_STACK_FUNCS(super_sys_array_size, |
| 2123 | struct btrfs_super_block, sys_chunk_array_size, 32); |
| 2124 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation, |
| 2125 | struct btrfs_super_block, chunk_root_generation, 64); |
| 2126 | BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block, |
| 2127 | root_level, 8); |
| 2128 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block, |
| 2129 | chunk_root, 64); |
| 2130 | BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block, |
| 2131 | chunk_root_level, 8); |
| 2132 | BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, |
| 2133 | log_root, 64); |
| 2134 | BTRFS_SETGET_STACK_FUNCS(super_log_root_transid, struct btrfs_super_block, |
| 2135 | log_root_transid, 64); |
| 2136 | BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block, |
| 2137 | log_root_level, 8); |
| 2138 | BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block, |
| 2139 | total_bytes, 64); |
| 2140 | BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block, |
| 2141 | bytes_used, 64); |
| 2142 | BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block, |
| 2143 | sectorsize, 32); |
| 2144 | BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block, |
| 2145 | nodesize, 32); |
| 2146 | BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block, |
| 2147 | stripesize, 32); |
| 2148 | BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block, |
| 2149 | root_dir_objectid, 64); |
| 2150 | BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block, |
| 2151 | num_devices, 64); |
| 2152 | BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block, |
| 2153 | compat_flags, 64); |
| 2154 | BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block, |
| 2155 | compat_ro_flags, 64); |
| 2156 | BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block, |
| 2157 | incompat_flags, 64); |
| 2158 | BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block, |
| 2159 | csum_type, 16); |
| 2160 | BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block, |
| 2161 | cache_generation, 64); |
| 2162 | BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64); |
| 2163 | BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block, |
| 2164 | uuid_tree_generation, 64); |
| 2165 | |
| 2166 | int btrfs_super_csum_size(const struct btrfs_super_block *s); |
| 2167 | const char *btrfs_super_csum_name(u16 csum_type); |
| 2168 | |
| 2169 | /* |
| 2170 | * The leaf data grows from end-to-front in the node. |
| 2171 | * this returns the address of the start of the last item, |
| 2172 | * which is the stop of the leaf data stack |
| 2173 | */ |
| 2174 | static inline unsigned int leaf_data_end(const struct extent_buffer *leaf) |
| 2175 | { |
| 2176 | u32 nr = btrfs_header_nritems(leaf); |
| 2177 | |
| 2178 | if (nr == 0) |
| 2179 | return BTRFS_LEAF_DATA_SIZE(leaf->fs_info); |
| 2180 | return btrfs_item_offset_nr(leaf, nr - 1); |
| 2181 | } |
| 2182 | |
| 2183 | /* struct btrfs_file_extent_item */ |
| 2184 | BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8); |
| 2185 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr, |
| 2186 | struct btrfs_file_extent_item, disk_bytenr, 64); |
| 2187 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset, |
| 2188 | struct btrfs_file_extent_item, offset, 64); |
| 2189 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation, |
| 2190 | struct btrfs_file_extent_item, generation, 64); |
| 2191 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes, |
| 2192 | struct btrfs_file_extent_item, num_bytes, 64); |
| 2193 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes, |
| 2194 | struct btrfs_file_extent_item, disk_num_bytes, 64); |
| 2195 | BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression, |
| 2196 | struct btrfs_file_extent_item, compression, 8); |
| 2197 | |
| 2198 | static inline unsigned long |
| 2199 | btrfs_file_extent_inline_start(const struct btrfs_file_extent_item *e) |
| 2200 | { |
| 2201 | return (unsigned long)e + BTRFS_FILE_EXTENT_INLINE_DATA_START; |
| 2202 | } |
| 2203 | |
| 2204 | static inline u32 btrfs_file_extent_calc_inline_size(u32 datasize) |
| 2205 | { |
| 2206 | return BTRFS_FILE_EXTENT_INLINE_DATA_START + datasize; |
| 2207 | } |
| 2208 | |
| 2209 | BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item, |
| 2210 | disk_bytenr, 64); |
| 2211 | BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item, |
| 2212 | generation, 64); |
| 2213 | BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item, |
| 2214 | disk_num_bytes, 64); |
| 2215 | BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item, |
| 2216 | offset, 64); |
| 2217 | BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item, |
| 2218 | num_bytes, 64); |
| 2219 | BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item, |
| 2220 | ram_bytes, 64); |
| 2221 | BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item, |
| 2222 | compression, 8); |
| 2223 | BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item, |
| 2224 | encryption, 8); |
| 2225 | BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item, |
| 2226 | other_encoding, 16); |
| 2227 | |
| 2228 | /* |
| 2229 | * this returns the number of bytes used by the item on disk, minus the |
| 2230 | * size of any extent headers. If a file is compressed on disk, this is |
| 2231 | * the compressed size |
| 2232 | */ |
| 2233 | static inline u32 btrfs_file_extent_inline_item_len( |
| 2234 | const struct extent_buffer *eb, |
| 2235 | struct btrfs_item *e) |
| 2236 | { |
| 2237 | return btrfs_item_size(eb, e) - BTRFS_FILE_EXTENT_INLINE_DATA_START; |
| 2238 | } |
| 2239 | |
| 2240 | /* btrfs_qgroup_status_item */ |
| 2241 | BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item, |
| 2242 | generation, 64); |
| 2243 | BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item, |
| 2244 | version, 64); |
| 2245 | BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item, |
| 2246 | flags, 64); |
| 2247 | BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item, |
| 2248 | rescan, 64); |
| 2249 | |
| 2250 | /* btrfs_qgroup_info_item */ |
| 2251 | BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item, |
| 2252 | generation, 64); |
| 2253 | BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64); |
| 2254 | BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item, |
| 2255 | rfer_cmpr, 64); |
| 2256 | BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64); |
| 2257 | BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item, |
| 2258 | excl_cmpr, 64); |
| 2259 | |
| 2260 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation, |
| 2261 | struct btrfs_qgroup_info_item, generation, 64); |
| 2262 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item, |
| 2263 | rfer, 64); |
| 2264 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr, |
| 2265 | struct btrfs_qgroup_info_item, rfer_cmpr, 64); |
| 2266 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item, |
| 2267 | excl, 64); |
| 2268 | BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr, |
| 2269 | struct btrfs_qgroup_info_item, excl_cmpr, 64); |
| 2270 | |
| 2271 | /* btrfs_qgroup_limit_item */ |
| 2272 | BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, |
| 2273 | flags, 64); |
| 2274 | BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item, |
| 2275 | max_rfer, 64); |
| 2276 | BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item, |
| 2277 | max_excl, 64); |
| 2278 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item, |
| 2279 | rsv_rfer, 64); |
| 2280 | BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item, |
| 2281 | rsv_excl, 64); |
| 2282 | |
| 2283 | /* btrfs_dev_replace_item */ |
| 2284 | BTRFS_SETGET_FUNCS(dev_replace_src_devid, |
| 2285 | struct btrfs_dev_replace_item, src_devid, 64); |
| 2286 | BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode, |
| 2287 | struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode, |
| 2288 | 64); |
| 2289 | BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item, |
| 2290 | replace_state, 64); |
| 2291 | BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item, |
| 2292 | time_started, 64); |
| 2293 | BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item, |
| 2294 | time_stopped, 64); |
| 2295 | BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item, |
| 2296 | num_write_errors, 64); |
| 2297 | BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors, |
| 2298 | struct btrfs_dev_replace_item, num_uncorrectable_read_errors, |
| 2299 | 64); |
| 2300 | BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item, |
| 2301 | cursor_left, 64); |
| 2302 | BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item, |
| 2303 | cursor_right, 64); |
| 2304 | |
| 2305 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid, |
| 2306 | struct btrfs_dev_replace_item, src_devid, 64); |
| 2307 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode, |
| 2308 | struct btrfs_dev_replace_item, |
| 2309 | cont_reading_from_srcdev_mode, 64); |
| 2310 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state, |
| 2311 | struct btrfs_dev_replace_item, replace_state, 64); |
| 2312 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started, |
| 2313 | struct btrfs_dev_replace_item, time_started, 64); |
| 2314 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped, |
| 2315 | struct btrfs_dev_replace_item, time_stopped, 64); |
| 2316 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors, |
| 2317 | struct btrfs_dev_replace_item, num_write_errors, 64); |
| 2318 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors, |
| 2319 | struct btrfs_dev_replace_item, |
| 2320 | num_uncorrectable_read_errors, 64); |
| 2321 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left, |
| 2322 | struct btrfs_dev_replace_item, cursor_left, 64); |
| 2323 | BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right, |
| 2324 | struct btrfs_dev_replace_item, cursor_right, 64); |
| 2325 | |
| 2326 | /* helper function to cast into the data area of the leaf. */ |
| 2327 | #define btrfs_item_ptr(leaf, slot, type) \ |
| 2328 | ((type *)(BTRFS_LEAF_DATA_OFFSET + \ |
| 2329 | btrfs_item_offset_nr(leaf, slot))) |
| 2330 | |
| 2331 | #define btrfs_item_ptr_offset(leaf, slot) \ |
| 2332 | ((unsigned long)(BTRFS_LEAF_DATA_OFFSET + \ |
| 2333 | btrfs_item_offset_nr(leaf, slot))) |
| 2334 | |
| 2335 | static inline u32 btrfs_crc32c(u32 crc, const void *address, unsigned length) |
| 2336 | { |
| 2337 | return crc32c(crc, address, length); |
| 2338 | } |
| 2339 | |
| 2340 | static inline void btrfs_crc32c_final(u32 crc, u8 *result) |
| 2341 | { |
| 2342 | put_unaligned_le32(~crc, result); |
| 2343 | } |
| 2344 | |
| 2345 | static inline u64 btrfs_name_hash(const char *name, int len) |
| 2346 | { |
| 2347 | return crc32c((u32)~1, name, len); |
| 2348 | } |
| 2349 | |
| 2350 | /* |
| 2351 | * Figure the key offset of an extended inode ref |
| 2352 | */ |
| 2353 | static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name, |
| 2354 | int len) |
| 2355 | { |
| 2356 | return (u64) crc32c(parent_objectid, name, len); |
| 2357 | } |
| 2358 | |
| 2359 | static inline gfp_t btrfs_alloc_write_mask(struct address_space *mapping) |
| 2360 | { |
| 2361 | return mapping_gfp_constraint(mapping, ~__GFP_FS); |
| 2362 | } |
| 2363 | |
| 2364 | /* extent-tree.c */ |
| 2365 | |
| 2366 | enum btrfs_inline_ref_type { |
| 2367 | BTRFS_REF_TYPE_INVALID, |
| 2368 | BTRFS_REF_TYPE_BLOCK, |
| 2369 | BTRFS_REF_TYPE_DATA, |
| 2370 | BTRFS_REF_TYPE_ANY, |
| 2371 | }; |
| 2372 | |
| 2373 | int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, |
| 2374 | struct btrfs_extent_inline_ref *iref, |
| 2375 | enum btrfs_inline_ref_type is_data); |
| 2376 | u64 hash_extent_data_ref(u64 root_objectid, u64 owner, u64 offset); |
| 2377 | |
| 2378 | u64 btrfs_csum_bytes_to_leaves(struct btrfs_fs_info *fs_info, u64 csum_bytes); |
| 2379 | |
| 2380 | /* |
| 2381 | * Use this if we would be adding new items, as we could split nodes as we cow |
| 2382 | * down the tree. |
| 2383 | */ |
| 2384 | static inline u64 btrfs_calc_insert_metadata_size(struct btrfs_fs_info *fs_info, |
| 2385 | unsigned num_items) |
| 2386 | { |
| 2387 | return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items; |
| 2388 | } |
| 2389 | |
| 2390 | /* |
| 2391 | * Doing a truncate or a modification won't result in new nodes or leaves, just |
| 2392 | * what we need for COW. |
| 2393 | */ |
| 2394 | static inline u64 btrfs_calc_metadata_size(struct btrfs_fs_info *fs_info, |
| 2395 | unsigned num_items) |
| 2396 | { |
| 2397 | return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items; |
| 2398 | } |
| 2399 | |
| 2400 | int btrfs_add_excluded_extent(struct btrfs_fs_info *fs_info, |
| 2401 | u64 start, u64 num_bytes); |
| 2402 | void btrfs_free_excluded_extents(struct btrfs_block_group_cache *cache); |
| 2403 | int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans, |
| 2404 | unsigned long count); |
| 2405 | void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, |
| 2406 | struct btrfs_delayed_ref_root *delayed_refs, |
| 2407 | struct btrfs_delayed_ref_head *head); |
| 2408 | int btrfs_lookup_data_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len); |
| 2409 | int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans, |
| 2410 | struct btrfs_fs_info *fs_info, u64 bytenr, |
| 2411 | u64 offset, int metadata, u64 *refs, u64 *flags); |
| 2412 | int btrfs_pin_extent(struct btrfs_fs_info *fs_info, |
| 2413 | u64 bytenr, u64 num, int reserved); |
| 2414 | int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info, |
| 2415 | u64 bytenr, u64 num_bytes); |
| 2416 | int btrfs_exclude_logged_extents(struct extent_buffer *eb); |
| 2417 | int btrfs_cross_ref_exist(struct btrfs_root *root, |
| 2418 | u64 objectid, u64 offset, u64 bytenr); |
| 2419 | struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans, |
| 2420 | struct btrfs_root *root, |
| 2421 | u64 parent, u64 root_objectid, |
| 2422 | const struct btrfs_disk_key *key, |
| 2423 | int level, u64 hint, |
| 2424 | u64 empty_size); |
| 2425 | void btrfs_free_tree_block(struct btrfs_trans_handle *trans, |
| 2426 | struct btrfs_root *root, |
| 2427 | struct extent_buffer *buf, |
| 2428 | u64 parent, int last_ref); |
| 2429 | int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans, |
| 2430 | struct btrfs_root *root, u64 owner, |
| 2431 | u64 offset, u64 ram_bytes, |
| 2432 | struct btrfs_key *ins); |
| 2433 | int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, |
| 2434 | u64 root_objectid, u64 owner, u64 offset, |
| 2435 | struct btrfs_key *ins); |
| 2436 | int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes, u64 num_bytes, |
| 2437 | u64 min_alloc_size, u64 empty_size, u64 hint_byte, |
| 2438 | struct btrfs_key *ins, int is_data, int delalloc); |
| 2439 | int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2440 | struct extent_buffer *buf, int full_backref); |
| 2441 | int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2442 | struct extent_buffer *buf, int full_backref); |
| 2443 | int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans, |
| 2444 | u64 bytenr, u64 num_bytes, u64 flags, |
| 2445 | int level, int is_data); |
| 2446 | int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref); |
| 2447 | |
| 2448 | int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info, |
| 2449 | u64 start, u64 len, int delalloc); |
| 2450 | int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info, |
| 2451 | u64 start, u64 len); |
| 2452 | void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info); |
| 2453 | int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans); |
| 2454 | int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, |
| 2455 | struct btrfs_ref *generic_ref); |
| 2456 | |
| 2457 | int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr); |
| 2458 | void btrfs_get_block_group_trimming(struct btrfs_block_group_cache *cache); |
| 2459 | void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *cache); |
| 2460 | void btrfs_clear_space_info_full(struct btrfs_fs_info *info); |
| 2461 | |
| 2462 | enum btrfs_reserve_flush_enum { |
| 2463 | /* If we are in the transaction, we can't flush anything.*/ |
| 2464 | BTRFS_RESERVE_NO_FLUSH, |
| 2465 | /* |
| 2466 | * Flushing delalloc may cause deadlock somewhere, in this |
| 2467 | * case, use FLUSH LIMIT |
| 2468 | */ |
| 2469 | BTRFS_RESERVE_FLUSH_LIMIT, |
| 2470 | BTRFS_RESERVE_FLUSH_EVICT, |
| 2471 | BTRFS_RESERVE_FLUSH_ALL, |
| 2472 | }; |
| 2473 | |
| 2474 | enum btrfs_flush_state { |
| 2475 | FLUSH_DELAYED_ITEMS_NR = 1, |
| 2476 | FLUSH_DELAYED_ITEMS = 2, |
| 2477 | FLUSH_DELAYED_REFS_NR = 3, |
| 2478 | FLUSH_DELAYED_REFS = 4, |
| 2479 | FLUSH_DELALLOC = 5, |
| 2480 | FLUSH_DELALLOC_WAIT = 6, |
| 2481 | ALLOC_CHUNK = 7, |
| 2482 | ALLOC_CHUNK_FORCE = 8, |
| 2483 | RUN_DELAYED_IPUTS = 9, |
| 2484 | COMMIT_TRANS = 10, |
| 2485 | }; |
| 2486 | |
| 2487 | int btrfs_subvolume_reserve_metadata(struct btrfs_root *root, |
| 2488 | struct btrfs_block_rsv *rsv, |
| 2489 | int nitems, bool use_global_rsv); |
| 2490 | void btrfs_subvolume_release_metadata(struct btrfs_fs_info *fs_info, |
| 2491 | struct btrfs_block_rsv *rsv); |
| 2492 | void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes, |
| 2493 | bool qgroup_free); |
| 2494 | |
| 2495 | int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes); |
| 2496 | u64 btrfs_account_ro_block_groups_free_space(struct btrfs_space_info *sinfo); |
| 2497 | int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info, |
| 2498 | u64 start, u64 end); |
| 2499 | int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr, |
| 2500 | u64 num_bytes, u64 *actual_bytes); |
| 2501 | int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range); |
| 2502 | |
| 2503 | int btrfs_init_space_info(struct btrfs_fs_info *fs_info); |
| 2504 | int btrfs_delayed_refs_qgroup_accounting(struct btrfs_trans_handle *trans, |
| 2505 | struct btrfs_fs_info *fs_info); |
| 2506 | int btrfs_start_write_no_snapshotting(struct btrfs_root *root); |
| 2507 | void btrfs_end_write_no_snapshotting(struct btrfs_root *root); |
| 2508 | void btrfs_wait_for_snapshot_creation(struct btrfs_root *root); |
| 2509 | |
| 2510 | /* ctree.c */ |
| 2511 | int btrfs_bin_search(struct extent_buffer *eb, const struct btrfs_key *key, |
| 2512 | int level, int *slot); |
| 2513 | int btrfs_comp_cpu_keys(const struct btrfs_key *k1, const struct btrfs_key *k2); |
| 2514 | int btrfs_previous_item(struct btrfs_root *root, |
| 2515 | struct btrfs_path *path, u64 min_objectid, |
| 2516 | int type); |
| 2517 | int btrfs_previous_extent_item(struct btrfs_root *root, |
| 2518 | struct btrfs_path *path, u64 min_objectid); |
| 2519 | void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info, |
| 2520 | struct btrfs_path *path, |
| 2521 | const struct btrfs_key *new_key); |
| 2522 | struct extent_buffer *btrfs_root_node(struct btrfs_root *root); |
| 2523 | struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root); |
| 2524 | struct extent_buffer *btrfs_read_lock_root_node(struct btrfs_root *root); |
| 2525 | int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path, |
| 2526 | struct btrfs_key *key, int lowest_level, |
| 2527 | u64 min_trans); |
| 2528 | int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key, |
| 2529 | struct btrfs_path *path, |
| 2530 | u64 min_trans); |
| 2531 | struct extent_buffer *btrfs_read_node_slot(struct extent_buffer *parent, |
| 2532 | int slot); |
| 2533 | |
| 2534 | int btrfs_cow_block(struct btrfs_trans_handle *trans, |
| 2535 | struct btrfs_root *root, struct extent_buffer *buf, |
| 2536 | struct extent_buffer *parent, int parent_slot, |
| 2537 | struct extent_buffer **cow_ret); |
| 2538 | int btrfs_copy_root(struct btrfs_trans_handle *trans, |
| 2539 | struct btrfs_root *root, |
| 2540 | struct extent_buffer *buf, |
| 2541 | struct extent_buffer **cow_ret, u64 new_root_objectid); |
| 2542 | int btrfs_block_can_be_shared(struct btrfs_root *root, |
| 2543 | struct extent_buffer *buf); |
| 2544 | void btrfs_extend_item(struct btrfs_path *path, u32 data_size); |
| 2545 | void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end); |
| 2546 | int btrfs_split_item(struct btrfs_trans_handle *trans, |
| 2547 | struct btrfs_root *root, |
| 2548 | struct btrfs_path *path, |
| 2549 | const struct btrfs_key *new_key, |
| 2550 | unsigned long split_offset); |
| 2551 | int btrfs_duplicate_item(struct btrfs_trans_handle *trans, |
| 2552 | struct btrfs_root *root, |
| 2553 | struct btrfs_path *path, |
| 2554 | const struct btrfs_key *new_key); |
| 2555 | int btrfs_find_item(struct btrfs_root *fs_root, struct btrfs_path *path, |
| 2556 | u64 inum, u64 ioff, u8 key_type, struct btrfs_key *found_key); |
| 2557 | int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2558 | const struct btrfs_key *key, struct btrfs_path *p, |
| 2559 | int ins_len, int cow); |
| 2560 | int btrfs_search_old_slot(struct btrfs_root *root, const struct btrfs_key *key, |
| 2561 | struct btrfs_path *p, u64 time_seq); |
| 2562 | int btrfs_search_slot_for_read(struct btrfs_root *root, |
| 2563 | const struct btrfs_key *key, |
| 2564 | struct btrfs_path *p, int find_higher, |
| 2565 | int return_any); |
| 2566 | int btrfs_realloc_node(struct btrfs_trans_handle *trans, |
| 2567 | struct btrfs_root *root, struct extent_buffer *parent, |
| 2568 | int start_slot, u64 *last_ret, |
| 2569 | struct btrfs_key *progress); |
| 2570 | void btrfs_release_path(struct btrfs_path *p); |
| 2571 | struct btrfs_path *btrfs_alloc_path(void); |
| 2572 | void btrfs_free_path(struct btrfs_path *p); |
| 2573 | void btrfs_set_path_blocking(struct btrfs_path *p); |
| 2574 | void btrfs_unlock_up_safe(struct btrfs_path *p, int level); |
| 2575 | |
| 2576 | int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2577 | struct btrfs_path *path, int slot, int nr); |
| 2578 | static inline int btrfs_del_item(struct btrfs_trans_handle *trans, |
| 2579 | struct btrfs_root *root, |
| 2580 | struct btrfs_path *path) |
| 2581 | { |
| 2582 | return btrfs_del_items(trans, root, path, path->slots[0], 1); |
| 2583 | } |
| 2584 | |
| 2585 | void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path, |
| 2586 | const struct btrfs_key *cpu_key, u32 *data_size, |
| 2587 | u32 total_data, u32 total_size, int nr); |
| 2588 | int btrfs_insert_item(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2589 | const struct btrfs_key *key, void *data, u32 data_size); |
| 2590 | int btrfs_insert_empty_items(struct btrfs_trans_handle *trans, |
| 2591 | struct btrfs_root *root, |
| 2592 | struct btrfs_path *path, |
| 2593 | const struct btrfs_key *cpu_key, u32 *data_size, |
| 2594 | int nr); |
| 2595 | |
| 2596 | static inline int btrfs_insert_empty_item(struct btrfs_trans_handle *trans, |
| 2597 | struct btrfs_root *root, |
| 2598 | struct btrfs_path *path, |
| 2599 | const struct btrfs_key *key, |
| 2600 | u32 data_size) |
| 2601 | { |
| 2602 | return btrfs_insert_empty_items(trans, root, path, key, &data_size, 1); |
| 2603 | } |
| 2604 | |
| 2605 | int btrfs_next_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 2606 | int btrfs_prev_leaf(struct btrfs_root *root, struct btrfs_path *path); |
| 2607 | int btrfs_next_old_leaf(struct btrfs_root *root, struct btrfs_path *path, |
| 2608 | u64 time_seq); |
| 2609 | static inline int btrfs_next_old_item(struct btrfs_root *root, |
| 2610 | struct btrfs_path *p, u64 time_seq) |
| 2611 | { |
| 2612 | ++p->slots[0]; |
| 2613 | if (p->slots[0] >= btrfs_header_nritems(p->nodes[0])) |
| 2614 | return btrfs_next_old_leaf(root, p, time_seq); |
| 2615 | return 0; |
| 2616 | } |
| 2617 | static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p) |
| 2618 | { |
| 2619 | return btrfs_next_old_item(root, p, 0); |
| 2620 | } |
| 2621 | int btrfs_leaf_free_space(struct extent_buffer *leaf); |
| 2622 | int __must_check btrfs_drop_snapshot(struct btrfs_root *root, |
| 2623 | struct btrfs_block_rsv *block_rsv, |
| 2624 | int update_ref, int for_reloc); |
| 2625 | int btrfs_drop_subtree(struct btrfs_trans_handle *trans, |
| 2626 | struct btrfs_root *root, |
| 2627 | struct extent_buffer *node, |
| 2628 | struct extent_buffer *parent); |
| 2629 | static inline int btrfs_fs_closing(struct btrfs_fs_info *fs_info) |
| 2630 | { |
| 2631 | /* |
| 2632 | * Do it this way so we only ever do one test_bit in the normal case. |
| 2633 | */ |
| 2634 | if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) { |
| 2635 | if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags)) |
| 2636 | return 2; |
| 2637 | return 1; |
| 2638 | } |
| 2639 | return 0; |
| 2640 | } |
| 2641 | |
| 2642 | /* |
| 2643 | * If we remount the fs to be R/O or umount the fs, the cleaner needn't do |
| 2644 | * anything except sleeping. This function is used to check the status of |
| 2645 | * the fs. |
| 2646 | */ |
| 2647 | static inline int btrfs_need_cleaner_sleep(struct btrfs_fs_info *fs_info) |
| 2648 | { |
| 2649 | return fs_info->sb->s_flags & SB_RDONLY || btrfs_fs_closing(fs_info); |
| 2650 | } |
| 2651 | |
| 2652 | static inline void free_fs_info(struct btrfs_fs_info *fs_info) |
| 2653 | { |
| 2654 | kfree(fs_info->balance_ctl); |
| 2655 | kfree(fs_info->delayed_root); |
| 2656 | kfree(fs_info->extent_root); |
| 2657 | kfree(fs_info->tree_root); |
| 2658 | kfree(fs_info->chunk_root); |
| 2659 | kfree(fs_info->dev_root); |
| 2660 | kfree(fs_info->csum_root); |
| 2661 | kfree(fs_info->quota_root); |
| 2662 | kfree(fs_info->uuid_root); |
| 2663 | kfree(fs_info->free_space_root); |
| 2664 | kfree(fs_info->super_copy); |
| 2665 | kfree(fs_info->super_for_commit); |
| 2666 | kvfree(fs_info); |
| 2667 | } |
| 2668 | |
| 2669 | /* tree mod log functions from ctree.c */ |
| 2670 | u64 btrfs_get_tree_mod_seq(struct btrfs_fs_info *fs_info, |
| 2671 | struct seq_list *elem); |
| 2672 | void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info, |
| 2673 | struct seq_list *elem); |
| 2674 | int btrfs_old_root_level(struct btrfs_root *root, u64 time_seq); |
| 2675 | |
| 2676 | /* root-item.c */ |
| 2677 | int btrfs_add_root_ref(struct btrfs_trans_handle *trans, u64 root_id, |
| 2678 | u64 ref_id, u64 dirid, u64 sequence, const char *name, |
| 2679 | int name_len); |
| 2680 | int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id, |
| 2681 | u64 ref_id, u64 dirid, u64 *sequence, const char *name, |
| 2682 | int name_len); |
| 2683 | int btrfs_del_root(struct btrfs_trans_handle *trans, |
| 2684 | const struct btrfs_key *key); |
| 2685 | int btrfs_insert_root(struct btrfs_trans_handle *trans, struct btrfs_root *root, |
| 2686 | const struct btrfs_key *key, |
| 2687 | struct btrfs_root_item *item); |
| 2688 | int __must_check btrfs_update_root(struct btrfs_trans_handle *trans, |
| 2689 | struct btrfs_root *root, |
| 2690 | struct btrfs_key *key, |
| 2691 | struct btrfs_root_item *item); |
| 2692 | int btrfs_find_root(struct btrfs_root *root, const struct btrfs_key *search_key, |
| 2693 | struct btrfs_path *path, struct btrfs_root_item *root_item, |
| 2694 | struct btrfs_key *root_key); |
| 2695 | int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info); |
| 2696 | void btrfs_set_root_node(struct btrfs_root_item *item, |
| 2697 | struct extent_buffer *node); |
| 2698 | void btrfs_check_and_init_root_item(struct btrfs_root_item *item); |
| 2699 | void btrfs_update_root_times(struct btrfs_trans_handle *trans, |
| 2700 | struct btrfs_root *root); |
| 2701 | |
| 2702 | /* uuid-tree.c */ |
| 2703 | int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, |
| 2704 | u64 subid); |
| 2705 | int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type, |
| 2706 | u64 subid); |
| 2707 | int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info, |
| 2708 | int (*check_func)(struct btrfs_fs_info *, u8 *, u8, |
| 2709 | u64)); |
| 2710 | |
| 2711 | /* dir-item.c */ |
| 2712 | int btrfs_check_dir_item_collision(struct btrfs_root *root, u64 dir, |
| 2713 | const char *name, int name_len); |
| 2714 | int btrfs_insert_dir_item(struct btrfs_trans_handle *trans, const char *name, |
| 2715 | int name_len, struct btrfs_inode *dir, |
| 2716 | struct btrfs_key *location, u8 type, u64 index); |
| 2717 | struct btrfs_dir_item *btrfs_lookup_dir_item(struct btrfs_trans_handle *trans, |
| 2718 | struct btrfs_root *root, |
| 2719 | struct btrfs_path *path, u64 dir, |
| 2720 | const char *name, int name_len, |
| 2721 | int mod); |
| 2722 | struct btrfs_dir_item * |
| 2723 | btrfs_lookup_dir_index_item(struct btrfs_trans_handle *trans, |
| 2724 | struct btrfs_root *root, |
| 2725 | struct btrfs_path *path, u64 dir, |
| 2726 | u64 objectid, const char *name, int name_len, |
| 2727 | int mod); |
| 2728 | struct btrfs_dir_item * |
| 2729 | btrfs_search_dir_index_item(struct btrfs_root *root, |
| 2730 | struct btrfs_path *path, u64 dirid, |
| 2731 | const char *name, int name_len); |
| 2732 | int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans, |
| 2733 | struct btrfs_root *root, |
| 2734 | struct btrfs_path *path, |
| 2735 | struct btrfs_dir_item *di); |
| 2736 | int btrfs_insert_xattr_item(struct btrfs_trans_handle *trans, |
| 2737 | struct btrfs_root *root, |
| 2738 | struct btrfs_path *path, u64 objectid, |
| 2739 | const char *name, u16 name_len, |
| 2740 | const void *data, u16 data_len); |
| 2741 | struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans, |
| 2742 | struct btrfs_root *root, |
| 2743 | struct btrfs_path *path, u64 dir, |
| 2744 | const char *name, u16 name_len, |
| 2745 | int mod); |
| 2746 | struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_fs_info *fs_info, |
| 2747 | struct btrfs_path *path, |
| 2748 | const char *name, |
| 2749 | int name_len); |
| 2750 | |
| 2751 | /* orphan.c */ |
| 2752 | int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans, |
| 2753 | struct btrfs_root *root, u64 offset); |
| 2754 | int btrfs_del_orphan_item(struct btrfs_trans_handle *trans, |
| 2755 | struct btrfs_root *root, u64 offset); |
| 2756 | int btrfs_find_orphan_item(struct btrfs_root *root, u64 offset); |
| 2757 | |
| 2758 | /* inode-item.c */ |
| 2759 | int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans, |
| 2760 | struct btrfs_root *root, |
| 2761 | const char *name, int name_len, |
| 2762 | u64 inode_objectid, u64 ref_objectid, u64 index); |
| 2763 | int btrfs_del_inode_ref(struct btrfs_trans_handle *trans, |
| 2764 | struct btrfs_root *root, |
| 2765 | const char *name, int name_len, |
| 2766 | u64 inode_objectid, u64 ref_objectid, u64 *index); |
| 2767 | int btrfs_insert_empty_inode(struct btrfs_trans_handle *trans, |
| 2768 | struct btrfs_root *root, |
| 2769 | struct btrfs_path *path, u64 objectid); |
| 2770 | int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root |
| 2771 | *root, struct btrfs_path *path, |
| 2772 | struct btrfs_key *location, int mod); |
| 2773 | |
| 2774 | struct btrfs_inode_extref * |
| 2775 | btrfs_lookup_inode_extref(struct btrfs_trans_handle *trans, |
| 2776 | struct btrfs_root *root, |
| 2777 | struct btrfs_path *path, |
| 2778 | const char *name, int name_len, |
| 2779 | u64 inode_objectid, u64 ref_objectid, int ins_len, |
| 2780 | int cow); |
| 2781 | |
| 2782 | struct btrfs_inode_ref *btrfs_find_name_in_backref(struct extent_buffer *leaf, |
| 2783 | int slot, const char *name, |
| 2784 | int name_len); |
| 2785 | struct btrfs_inode_extref *btrfs_find_name_in_ext_backref( |
| 2786 | struct extent_buffer *leaf, int slot, u64 ref_objectid, |
| 2787 | const char *name, int name_len); |
| 2788 | /* file-item.c */ |
| 2789 | struct btrfs_dio_private; |
| 2790 | int btrfs_del_csums(struct btrfs_trans_handle *trans, |
| 2791 | struct btrfs_fs_info *fs_info, u64 bytenr, u64 len); |
| 2792 | blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, |
| 2793 | u8 *dst); |
| 2794 | blk_status_t btrfs_lookup_bio_sums_dio(struct inode *inode, struct bio *bio, |
| 2795 | u64 logical_offset); |
| 2796 | int btrfs_insert_file_extent(struct btrfs_trans_handle *trans, |
| 2797 | struct btrfs_root *root, |
| 2798 | u64 objectid, u64 pos, |
| 2799 | u64 disk_offset, u64 disk_num_bytes, |
| 2800 | u64 num_bytes, u64 offset, u64 ram_bytes, |
| 2801 | u8 compression, u8 encryption, u16 other_encoding); |
| 2802 | int btrfs_lookup_file_extent(struct btrfs_trans_handle *trans, |
| 2803 | struct btrfs_root *root, |
| 2804 | struct btrfs_path *path, u64 objectid, |
| 2805 | u64 bytenr, int mod); |
| 2806 | int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, |
| 2807 | struct btrfs_root *root, |
| 2808 | struct btrfs_ordered_sum *sums); |
| 2809 | blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio, |
| 2810 | u64 file_start, int contig); |
| 2811 | int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, |
| 2812 | struct list_head *list, int search_commit); |
| 2813 | void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, |
| 2814 | const struct btrfs_path *path, |
| 2815 | struct btrfs_file_extent_item *fi, |
| 2816 | const bool new_inline, |
| 2817 | struct extent_map *em); |
| 2818 | |
| 2819 | /* inode.c */ |
| 2820 | struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, |
| 2821 | u64 start, u64 len); |
| 2822 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, |
| 2823 | u64 *orig_start, u64 *orig_block_len, |
| 2824 | u64 *ram_bytes); |
| 2825 | |
| 2826 | void __btrfs_del_delalloc_inode(struct btrfs_root *root, |
| 2827 | struct btrfs_inode *inode); |
| 2828 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); |
| 2829 | int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); |
| 2830 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, |
| 2831 | struct btrfs_root *root, |
| 2832 | struct btrfs_inode *dir, struct btrfs_inode *inode, |
| 2833 | const char *name, int name_len); |
| 2834 | int btrfs_add_link(struct btrfs_trans_handle *trans, |
| 2835 | struct btrfs_inode *parent_inode, struct btrfs_inode *inode, |
| 2836 | const char *name, int name_len, int add_backref, u64 index); |
| 2837 | int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); |
| 2838 | int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len, |
| 2839 | int front); |
| 2840 | int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans, |
| 2841 | struct btrfs_root *root, |
| 2842 | struct inode *inode, u64 new_size, |
| 2843 | u32 min_type); |
| 2844 | |
| 2845 | int btrfs_start_delalloc_snapshot(struct btrfs_root *root); |
| 2846 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, int nr); |
| 2847 | int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, |
| 2848 | unsigned int extra_bits, |
| 2849 | struct extent_state **cached_state); |
| 2850 | int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, |
| 2851 | struct btrfs_root *new_root, |
| 2852 | struct btrfs_root *parent_root, |
| 2853 | u64 new_dirid); |
| 2854 | void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, |
| 2855 | unsigned *bits); |
| 2856 | void btrfs_clear_delalloc_extent(struct inode *inode, |
| 2857 | struct extent_state *state, unsigned *bits); |
| 2858 | void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, |
| 2859 | struct extent_state *other); |
| 2860 | void btrfs_split_delalloc_extent(struct inode *inode, |
| 2861 | struct extent_state *orig, u64 split); |
| 2862 | int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio, |
| 2863 | unsigned long bio_flags); |
| 2864 | void btrfs_set_range_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
| 2865 | vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); |
| 2866 | int btrfs_readpage(struct file *file, struct page *page); |
| 2867 | void btrfs_evict_inode(struct inode *inode); |
| 2868 | int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc); |
| 2869 | struct inode *btrfs_alloc_inode(struct super_block *sb); |
| 2870 | void btrfs_destroy_inode(struct inode *inode); |
| 2871 | void btrfs_free_inode(struct inode *inode); |
| 2872 | int btrfs_drop_inode(struct inode *inode); |
| 2873 | int __init btrfs_init_cachep(void); |
| 2874 | void __cold btrfs_destroy_cachep(void); |
| 2875 | struct inode *btrfs_iget_path(struct super_block *s, struct btrfs_key *location, |
| 2876 | struct btrfs_root *root, int *new, |
| 2877 | struct btrfs_path *path); |
| 2878 | struct inode *btrfs_iget(struct super_block *s, struct btrfs_key *location, |
| 2879 | struct btrfs_root *root, int *was_new); |
| 2880 | struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, |
| 2881 | struct page *page, size_t pg_offset, |
| 2882 | u64 start, u64 end, int create); |
| 2883 | int btrfs_update_inode(struct btrfs_trans_handle *trans, |
| 2884 | struct btrfs_root *root, |
| 2885 | struct inode *inode); |
| 2886 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, |
| 2887 | struct btrfs_root *root, struct inode *inode); |
| 2888 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, |
| 2889 | struct btrfs_inode *inode); |
| 2890 | int btrfs_orphan_cleanup(struct btrfs_root *root); |
| 2891 | int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); |
| 2892 | void btrfs_add_delayed_iput(struct inode *inode); |
| 2893 | void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); |
| 2894 | int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); |
| 2895 | int btrfs_prealloc_file_range(struct inode *inode, int mode, |
| 2896 | u64 start, u64 num_bytes, u64 min_size, |
| 2897 | loff_t actual_len, u64 *alloc_hint); |
| 2898 | int btrfs_prealloc_file_range_trans(struct inode *inode, |
| 2899 | struct btrfs_trans_handle *trans, int mode, |
| 2900 | u64 start, u64 num_bytes, u64 min_size, |
| 2901 | loff_t actual_len, u64 *alloc_hint); |
| 2902 | int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page, |
| 2903 | u64 start, u64 end, int *page_started, unsigned long *nr_written, |
| 2904 | struct writeback_control *wbc); |
| 2905 | int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end); |
| 2906 | void btrfs_writepage_endio_finish_ordered(struct page *page, u64 start, |
| 2907 | u64 end, int uptodate); |
| 2908 | extern const struct dentry_operations btrfs_dentry_operations; |
| 2909 | |
| 2910 | /* ioctl.c */ |
| 2911 | long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| 2912 | long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
| 2913 | int btrfs_ioctl_get_supported_features(void __user *arg); |
| 2914 | void btrfs_sync_inode_flags_to_i_flags(struct inode *inode); |
| 2915 | int btrfs_is_empty_uuid(u8 *uuid); |
| 2916 | int btrfs_defrag_file(struct inode *inode, struct file *file, |
| 2917 | struct btrfs_ioctl_defrag_range_args *range, |
| 2918 | u64 newer_than, unsigned long max_pages); |
| 2919 | void btrfs_get_block_group_info(struct list_head *groups_list, |
| 2920 | struct btrfs_ioctl_space_info *space); |
| 2921 | void btrfs_update_ioctl_balance_args(struct btrfs_fs_info *fs_info, |
| 2922 | struct btrfs_ioctl_balance_args *bargs); |
| 2923 | |
| 2924 | /* file.c */ |
| 2925 | int __init btrfs_auto_defrag_init(void); |
| 2926 | void __cold btrfs_auto_defrag_exit(void); |
| 2927 | int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans, |
| 2928 | struct btrfs_inode *inode); |
| 2929 | int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info); |
| 2930 | void btrfs_cleanup_defrag_inodes(struct btrfs_fs_info *fs_info); |
| 2931 | int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync); |
| 2932 | void btrfs_drop_extent_cache(struct btrfs_inode *inode, u64 start, u64 end, |
| 2933 | int skip_pinned); |
| 2934 | extern const struct file_operations btrfs_file_operations; |
| 2935 | int __btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| 2936 | struct btrfs_root *root, struct inode *inode, |
| 2937 | struct btrfs_path *path, u64 start, u64 end, |
| 2938 | u64 *drop_end, int drop_cache, |
| 2939 | int replace_extent, |
| 2940 | u32 extent_item_size, |
| 2941 | int *key_inserted); |
| 2942 | int btrfs_drop_extents(struct btrfs_trans_handle *trans, |
| 2943 | struct btrfs_root *root, struct inode *inode, u64 start, |
| 2944 | u64 end, int drop_cache); |
| 2945 | int btrfs_punch_hole_range(struct inode *inode, struct btrfs_path *path, |
| 2946 | const u64 start, const u64 end, |
| 2947 | struct btrfs_clone_extent_info *clone_info, |
| 2948 | struct btrfs_trans_handle **trans_out); |
| 2949 | int btrfs_mark_extent_written(struct btrfs_trans_handle *trans, |
| 2950 | struct btrfs_inode *inode, u64 start, u64 end); |
| 2951 | int btrfs_release_file(struct inode *inode, struct file *file); |
| 2952 | int btrfs_dirty_pages(struct inode *inode, struct page **pages, |
| 2953 | size_t num_pages, loff_t pos, size_t write_bytes, |
| 2954 | struct extent_state **cached); |
| 2955 | int btrfs_fdatawrite_range(struct inode *inode, loff_t start, loff_t end); |
| 2956 | loff_t btrfs_remap_file_range(struct file *file_in, loff_t pos_in, |
| 2957 | struct file *file_out, loff_t pos_out, |
| 2958 | loff_t len, unsigned int remap_flags); |
| 2959 | |
| 2960 | /* tree-defrag.c */ |
| 2961 | int btrfs_defrag_leaves(struct btrfs_trans_handle *trans, |
| 2962 | struct btrfs_root *root); |
| 2963 | |
| 2964 | /* super.c */ |
| 2965 | int btrfs_parse_options(struct btrfs_fs_info *info, char *options, |
| 2966 | unsigned long new_flags); |
| 2967 | int btrfs_sync_fs(struct super_block *sb, int wait); |
| 2968 | |
| 2969 | static inline __printf(2, 3) __cold |
| 2970 | void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) |
| 2971 | { |
| 2972 | } |
| 2973 | |
| 2974 | #ifdef CONFIG_PRINTK |
| 2975 | __printf(2, 3) |
| 2976 | __cold |
| 2977 | void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...); |
| 2978 | #else |
| 2979 | #define btrfs_printk(fs_info, fmt, args...) \ |
| 2980 | btrfs_no_printk(fs_info, fmt, ##args) |
| 2981 | #endif |
| 2982 | |
| 2983 | #define btrfs_emerg(fs_info, fmt, args...) \ |
| 2984 | btrfs_printk(fs_info, KERN_EMERG fmt, ##args) |
| 2985 | #define btrfs_alert(fs_info, fmt, args...) \ |
| 2986 | btrfs_printk(fs_info, KERN_ALERT fmt, ##args) |
| 2987 | #define btrfs_crit(fs_info, fmt, args...) \ |
| 2988 | btrfs_printk(fs_info, KERN_CRIT fmt, ##args) |
| 2989 | #define btrfs_err(fs_info, fmt, args...) \ |
| 2990 | btrfs_printk(fs_info, KERN_ERR fmt, ##args) |
| 2991 | #define btrfs_warn(fs_info, fmt, args...) \ |
| 2992 | btrfs_printk(fs_info, KERN_WARNING fmt, ##args) |
| 2993 | #define btrfs_notice(fs_info, fmt, args...) \ |
| 2994 | btrfs_printk(fs_info, KERN_NOTICE fmt, ##args) |
| 2995 | #define btrfs_info(fs_info, fmt, args...) \ |
| 2996 | btrfs_printk(fs_info, KERN_INFO fmt, ##args) |
| 2997 | |
| 2998 | /* |
| 2999 | * Wrappers that use printk_in_rcu |
| 3000 | */ |
| 3001 | #define btrfs_emerg_in_rcu(fs_info, fmt, args...) \ |
| 3002 | btrfs_printk_in_rcu(fs_info, KERN_EMERG fmt, ##args) |
| 3003 | #define btrfs_alert_in_rcu(fs_info, fmt, args...) \ |
| 3004 | btrfs_printk_in_rcu(fs_info, KERN_ALERT fmt, ##args) |
| 3005 | #define btrfs_crit_in_rcu(fs_info, fmt, args...) \ |
| 3006 | btrfs_printk_in_rcu(fs_info, KERN_CRIT fmt, ##args) |
| 3007 | #define btrfs_err_in_rcu(fs_info, fmt, args...) \ |
| 3008 | btrfs_printk_in_rcu(fs_info, KERN_ERR fmt, ##args) |
| 3009 | #define btrfs_warn_in_rcu(fs_info, fmt, args...) \ |
| 3010 | btrfs_printk_in_rcu(fs_info, KERN_WARNING fmt, ##args) |
| 3011 | #define btrfs_notice_in_rcu(fs_info, fmt, args...) \ |
| 3012 | btrfs_printk_in_rcu(fs_info, KERN_NOTICE fmt, ##args) |
| 3013 | #define btrfs_info_in_rcu(fs_info, fmt, args...) \ |
| 3014 | btrfs_printk_in_rcu(fs_info, KERN_INFO fmt, ##args) |
| 3015 | |
| 3016 | /* |
| 3017 | * Wrappers that use a ratelimited printk_in_rcu |
| 3018 | */ |
| 3019 | #define btrfs_emerg_rl_in_rcu(fs_info, fmt, args...) \ |
| 3020 | btrfs_printk_rl_in_rcu(fs_info, KERN_EMERG fmt, ##args) |
| 3021 | #define btrfs_alert_rl_in_rcu(fs_info, fmt, args...) \ |
| 3022 | btrfs_printk_rl_in_rcu(fs_info, KERN_ALERT fmt, ##args) |
| 3023 | #define btrfs_crit_rl_in_rcu(fs_info, fmt, args...) \ |
| 3024 | btrfs_printk_rl_in_rcu(fs_info, KERN_CRIT fmt, ##args) |
| 3025 | #define btrfs_err_rl_in_rcu(fs_info, fmt, args...) \ |
| 3026 | btrfs_printk_rl_in_rcu(fs_info, KERN_ERR fmt, ##args) |
| 3027 | #define btrfs_warn_rl_in_rcu(fs_info, fmt, args...) \ |
| 3028 | btrfs_printk_rl_in_rcu(fs_info, KERN_WARNING fmt, ##args) |
| 3029 | #define btrfs_notice_rl_in_rcu(fs_info, fmt, args...) \ |
| 3030 | btrfs_printk_rl_in_rcu(fs_info, KERN_NOTICE fmt, ##args) |
| 3031 | #define btrfs_info_rl_in_rcu(fs_info, fmt, args...) \ |
| 3032 | btrfs_printk_rl_in_rcu(fs_info, KERN_INFO fmt, ##args) |
| 3033 | |
| 3034 | /* |
| 3035 | * Wrappers that use a ratelimited printk |
| 3036 | */ |
| 3037 | #define btrfs_emerg_rl(fs_info, fmt, args...) \ |
| 3038 | btrfs_printk_ratelimited(fs_info, KERN_EMERG fmt, ##args) |
| 3039 | #define btrfs_alert_rl(fs_info, fmt, args...) \ |
| 3040 | btrfs_printk_ratelimited(fs_info, KERN_ALERT fmt, ##args) |
| 3041 | #define btrfs_crit_rl(fs_info, fmt, args...) \ |
| 3042 | btrfs_printk_ratelimited(fs_info, KERN_CRIT fmt, ##args) |
| 3043 | #define btrfs_err_rl(fs_info, fmt, args...) \ |
| 3044 | btrfs_printk_ratelimited(fs_info, KERN_ERR fmt, ##args) |
| 3045 | #define btrfs_warn_rl(fs_info, fmt, args...) \ |
| 3046 | btrfs_printk_ratelimited(fs_info, KERN_WARNING fmt, ##args) |
| 3047 | #define btrfs_notice_rl(fs_info, fmt, args...) \ |
| 3048 | btrfs_printk_ratelimited(fs_info, KERN_NOTICE fmt, ##args) |
| 3049 | #define btrfs_info_rl(fs_info, fmt, args...) \ |
| 3050 | btrfs_printk_ratelimited(fs_info, KERN_INFO fmt, ##args) |
| 3051 | |
| 3052 | #if defined(CONFIG_DYNAMIC_DEBUG) |
| 3053 | #define btrfs_debug(fs_info, fmt, args...) \ |
| 3054 | _dynamic_func_call_no_desc(fmt, btrfs_printk, \ |
| 3055 | fs_info, KERN_DEBUG fmt, ##args) |
| 3056 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ |
| 3057 | _dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu, \ |
| 3058 | fs_info, KERN_DEBUG fmt, ##args) |
| 3059 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ |
| 3060 | _dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu, \ |
| 3061 | fs_info, KERN_DEBUG fmt, ##args) |
| 3062 | #define btrfs_debug_rl(fs_info, fmt, args...) \ |
| 3063 | _dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited, \ |
| 3064 | fs_info, KERN_DEBUG fmt, ##args) |
| 3065 | #elif defined(DEBUG) |
| 3066 | #define btrfs_debug(fs_info, fmt, args...) \ |
| 3067 | btrfs_printk(fs_info, KERN_DEBUG fmt, ##args) |
| 3068 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ |
| 3069 | btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) |
| 3070 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ |
| 3071 | btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt, ##args) |
| 3072 | #define btrfs_debug_rl(fs_info, fmt, args...) \ |
| 3073 | btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt, ##args) |
| 3074 | #else |
| 3075 | #define btrfs_debug(fs_info, fmt, args...) \ |
| 3076 | btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) |
| 3077 | #define btrfs_debug_in_rcu(fs_info, fmt, args...) \ |
| 3078 | btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) |
| 3079 | #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...) \ |
| 3080 | btrfs_no_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args) |
| 3081 | #define btrfs_debug_rl(fs_info, fmt, args...) \ |
| 3082 | btrfs_no_printk(fs_info, KERN_DEBUG fmt, ##args) |
| 3083 | #endif |
| 3084 | |
| 3085 | #define btrfs_printk_in_rcu(fs_info, fmt, args...) \ |
| 3086 | do { \ |
| 3087 | rcu_read_lock(); \ |
| 3088 | btrfs_printk(fs_info, fmt, ##args); \ |
| 3089 | rcu_read_unlock(); \ |
| 3090 | } while (0) |
| 3091 | |
| 3092 | #define btrfs_no_printk_in_rcu(fs_info, fmt, args...) \ |
| 3093 | do { \ |
| 3094 | rcu_read_lock(); \ |
| 3095 | btrfs_no_printk(fs_info, fmt, ##args); \ |
| 3096 | rcu_read_unlock(); \ |
| 3097 | } while (0) |
| 3098 | |
| 3099 | #define btrfs_printk_ratelimited(fs_info, fmt, args...) \ |
| 3100 | do { \ |
| 3101 | static DEFINE_RATELIMIT_STATE(_rs, \ |
| 3102 | DEFAULT_RATELIMIT_INTERVAL, \ |
| 3103 | DEFAULT_RATELIMIT_BURST); \ |
| 3104 | if (__ratelimit(&_rs)) \ |
| 3105 | btrfs_printk(fs_info, fmt, ##args); \ |
| 3106 | } while (0) |
| 3107 | |
| 3108 | #define btrfs_printk_rl_in_rcu(fs_info, fmt, args...) \ |
| 3109 | do { \ |
| 3110 | rcu_read_lock(); \ |
| 3111 | btrfs_printk_ratelimited(fs_info, fmt, ##args); \ |
| 3112 | rcu_read_unlock(); \ |
| 3113 | } while (0) |
| 3114 | |
| 3115 | __cold |
| 3116 | static inline void assfail(const char *expr, const char *file, int line) |
| 3117 | { |
| 3118 | if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) { |
| 3119 | pr_err("assertion failed: %s, in %s:%d\n", expr, file, line); |
| 3120 | BUG(); |
| 3121 | } |
| 3122 | } |
| 3123 | |
| 3124 | #define ASSERT(expr) \ |
| 3125 | (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) |
| 3126 | |
| 3127 | /* |
| 3128 | * Use that for functions that are conditionally exported for sanity tests but |
| 3129 | * otherwise static |
| 3130 | */ |
| 3131 | #ifndef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 3132 | #define EXPORT_FOR_TESTS static |
| 3133 | #else |
| 3134 | #define EXPORT_FOR_TESTS |
| 3135 | #endif |
| 3136 | |
| 3137 | __cold |
| 3138 | static inline void btrfs_print_v0_err(struct btrfs_fs_info *fs_info) |
| 3139 | { |
| 3140 | btrfs_err(fs_info, |
| 3141 | "Unsupported V0 extent filesystem detected. Aborting. Please re-create your filesystem with a newer kernel"); |
| 3142 | } |
| 3143 | |
| 3144 | __printf(5, 6) |
| 3145 | __cold |
| 3146 | void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, |
| 3147 | unsigned int line, int errno, const char *fmt, ...); |
| 3148 | |
| 3149 | const char *btrfs_decode_error(int errno); |
| 3150 | |
| 3151 | __cold |
| 3152 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
| 3153 | const char *function, |
| 3154 | unsigned int line, int errno); |
| 3155 | |
| 3156 | /* |
| 3157 | * Call btrfs_abort_transaction as early as possible when an error condition is |
| 3158 | * detected, that way the exact line number is reported. |
| 3159 | */ |
| 3160 | #define btrfs_abort_transaction(trans, errno) \ |
| 3161 | do { \ |
| 3162 | /* Report first abort since mount */ \ |
| 3163 | if (!test_and_set_bit(BTRFS_FS_STATE_TRANS_ABORTED, \ |
| 3164 | &((trans)->fs_info->fs_state))) { \ |
| 3165 | if ((errno) != -EIO) { \ |
| 3166 | WARN(1, KERN_DEBUG \ |
| 3167 | "BTRFS: Transaction aborted (error %d)\n", \ |
| 3168 | (errno)); \ |
| 3169 | } else { \ |
| 3170 | btrfs_debug((trans)->fs_info, \ |
| 3171 | "Transaction aborted (error %d)", \ |
| 3172 | (errno)); \ |
| 3173 | } \ |
| 3174 | } \ |
| 3175 | __btrfs_abort_transaction((trans), __func__, \ |
| 3176 | __LINE__, (errno)); \ |
| 3177 | } while (0) |
| 3178 | |
| 3179 | #define btrfs_handle_fs_error(fs_info, errno, fmt, args...) \ |
| 3180 | do { \ |
| 3181 | __btrfs_handle_fs_error((fs_info), __func__, __LINE__, \ |
| 3182 | (errno), fmt, ##args); \ |
| 3183 | } while (0) |
| 3184 | |
| 3185 | __printf(5, 6) |
| 3186 | __cold |
| 3187 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
| 3188 | unsigned int line, int errno, const char *fmt, ...); |
| 3189 | /* |
| 3190 | * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic |
| 3191 | * will panic(). Otherwise we BUG() here. |
| 3192 | */ |
| 3193 | #define btrfs_panic(fs_info, errno, fmt, args...) \ |
| 3194 | do { \ |
| 3195 | __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \ |
| 3196 | BUG(); \ |
| 3197 | } while (0) |
| 3198 | |
| 3199 | |
| 3200 | /* compatibility and incompatibility defines */ |
| 3201 | |
| 3202 | #define btrfs_set_fs_incompat(__fs_info, opt) \ |
| 3203 | __btrfs_set_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ |
| 3204 | #opt) |
| 3205 | |
| 3206 | static inline void __btrfs_set_fs_incompat(struct btrfs_fs_info *fs_info, |
| 3207 | u64 flag, const char* name) |
| 3208 | { |
| 3209 | struct btrfs_super_block *disk_super; |
| 3210 | u64 features; |
| 3211 | |
| 3212 | disk_super = fs_info->super_copy; |
| 3213 | features = btrfs_super_incompat_flags(disk_super); |
| 3214 | if (!(features & flag)) { |
| 3215 | spin_lock(&fs_info->super_lock); |
| 3216 | features = btrfs_super_incompat_flags(disk_super); |
| 3217 | if (!(features & flag)) { |
| 3218 | features |= flag; |
| 3219 | btrfs_set_super_incompat_flags(disk_super, features); |
| 3220 | btrfs_info(fs_info, |
| 3221 | "setting incompat feature flag for %s (0x%llx)", |
| 3222 | name, flag); |
| 3223 | } |
| 3224 | spin_unlock(&fs_info->super_lock); |
| 3225 | } |
| 3226 | } |
| 3227 | |
| 3228 | #define btrfs_clear_fs_incompat(__fs_info, opt) \ |
| 3229 | __btrfs_clear_fs_incompat((__fs_info), BTRFS_FEATURE_INCOMPAT_##opt, \ |
| 3230 | #opt) |
| 3231 | |
| 3232 | static inline void __btrfs_clear_fs_incompat(struct btrfs_fs_info *fs_info, |
| 3233 | u64 flag, const char* name) |
| 3234 | { |
| 3235 | struct btrfs_super_block *disk_super; |
| 3236 | u64 features; |
| 3237 | |
| 3238 | disk_super = fs_info->super_copy; |
| 3239 | features = btrfs_super_incompat_flags(disk_super); |
| 3240 | if (features & flag) { |
| 3241 | spin_lock(&fs_info->super_lock); |
| 3242 | features = btrfs_super_incompat_flags(disk_super); |
| 3243 | if (features & flag) { |
| 3244 | features &= ~flag; |
| 3245 | btrfs_set_super_incompat_flags(disk_super, features); |
| 3246 | btrfs_info(fs_info, |
| 3247 | "clearing incompat feature flag for %s (0x%llx)", |
| 3248 | name, flag); |
| 3249 | } |
| 3250 | spin_unlock(&fs_info->super_lock); |
| 3251 | } |
| 3252 | } |
| 3253 | |
| 3254 | #define btrfs_fs_incompat(fs_info, opt) \ |
| 3255 | __btrfs_fs_incompat((fs_info), BTRFS_FEATURE_INCOMPAT_##opt) |
| 3256 | |
| 3257 | static inline bool __btrfs_fs_incompat(struct btrfs_fs_info *fs_info, u64 flag) |
| 3258 | { |
| 3259 | struct btrfs_super_block *disk_super; |
| 3260 | disk_super = fs_info->super_copy; |
| 3261 | return !!(btrfs_super_incompat_flags(disk_super) & flag); |
| 3262 | } |
| 3263 | |
| 3264 | #define btrfs_set_fs_compat_ro(__fs_info, opt) \ |
| 3265 | __btrfs_set_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ |
| 3266 | #opt) |
| 3267 | |
| 3268 | static inline void __btrfs_set_fs_compat_ro(struct btrfs_fs_info *fs_info, |
| 3269 | u64 flag, const char *name) |
| 3270 | { |
| 3271 | struct btrfs_super_block *disk_super; |
| 3272 | u64 features; |
| 3273 | |
| 3274 | disk_super = fs_info->super_copy; |
| 3275 | features = btrfs_super_compat_ro_flags(disk_super); |
| 3276 | if (!(features & flag)) { |
| 3277 | spin_lock(&fs_info->super_lock); |
| 3278 | features = btrfs_super_compat_ro_flags(disk_super); |
| 3279 | if (!(features & flag)) { |
| 3280 | features |= flag; |
| 3281 | btrfs_set_super_compat_ro_flags(disk_super, features); |
| 3282 | btrfs_info(fs_info, |
| 3283 | "setting compat-ro feature flag for %s (0x%llx)", |
| 3284 | name, flag); |
| 3285 | } |
| 3286 | spin_unlock(&fs_info->super_lock); |
| 3287 | } |
| 3288 | } |
| 3289 | |
| 3290 | #define btrfs_clear_fs_compat_ro(__fs_info, opt) \ |
| 3291 | __btrfs_clear_fs_compat_ro((__fs_info), BTRFS_FEATURE_COMPAT_RO_##opt, \ |
| 3292 | #opt) |
| 3293 | |
| 3294 | static inline void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, |
| 3295 | u64 flag, const char *name) |
| 3296 | { |
| 3297 | struct btrfs_super_block *disk_super; |
| 3298 | u64 features; |
| 3299 | |
| 3300 | disk_super = fs_info->super_copy; |
| 3301 | features = btrfs_super_compat_ro_flags(disk_super); |
| 3302 | if (features & flag) { |
| 3303 | spin_lock(&fs_info->super_lock); |
| 3304 | features = btrfs_super_compat_ro_flags(disk_super); |
| 3305 | if (features & flag) { |
| 3306 | features &= ~flag; |
| 3307 | btrfs_set_super_compat_ro_flags(disk_super, features); |
| 3308 | btrfs_info(fs_info, |
| 3309 | "clearing compat-ro feature flag for %s (0x%llx)", |
| 3310 | name, flag); |
| 3311 | } |
| 3312 | spin_unlock(&fs_info->super_lock); |
| 3313 | } |
| 3314 | } |
| 3315 | |
| 3316 | #define btrfs_fs_compat_ro(fs_info, opt) \ |
| 3317 | __btrfs_fs_compat_ro((fs_info), BTRFS_FEATURE_COMPAT_RO_##opt) |
| 3318 | |
| 3319 | static inline int __btrfs_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag) |
| 3320 | { |
| 3321 | struct btrfs_super_block *disk_super; |
| 3322 | disk_super = fs_info->super_copy; |
| 3323 | return !!(btrfs_super_compat_ro_flags(disk_super) & flag); |
| 3324 | } |
| 3325 | |
| 3326 | /* acl.c */ |
| 3327 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
| 3328 | struct posix_acl *btrfs_get_acl(struct inode *inode, int type); |
| 3329 | int btrfs_set_acl(struct inode *inode, struct posix_acl *acl, int type); |
| 3330 | int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 3331 | struct inode *inode, struct inode *dir); |
| 3332 | #else |
| 3333 | #define btrfs_get_acl NULL |
| 3334 | #define btrfs_set_acl NULL |
| 3335 | static inline int btrfs_init_acl(struct btrfs_trans_handle *trans, |
| 3336 | struct inode *inode, struct inode *dir) |
| 3337 | { |
| 3338 | return 0; |
| 3339 | } |
| 3340 | #endif |
| 3341 | |
| 3342 | /* relocation.c */ |
| 3343 | int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start); |
| 3344 | int btrfs_init_reloc_root(struct btrfs_trans_handle *trans, |
| 3345 | struct btrfs_root *root); |
| 3346 | int btrfs_update_reloc_root(struct btrfs_trans_handle *trans, |
| 3347 | struct btrfs_root *root); |
| 3348 | int btrfs_recover_relocation(struct btrfs_root *root); |
| 3349 | int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len); |
| 3350 | int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans, |
| 3351 | struct btrfs_root *root, struct extent_buffer *buf, |
| 3352 | struct extent_buffer *cow); |
| 3353 | void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending, |
| 3354 | u64 *bytes_to_reserve); |
| 3355 | int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans, |
| 3356 | struct btrfs_pending_snapshot *pending); |
| 3357 | |
| 3358 | /* scrub.c */ |
| 3359 | int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start, |
| 3360 | u64 end, struct btrfs_scrub_progress *progress, |
| 3361 | int readonly, int is_dev_replace); |
| 3362 | void btrfs_scrub_pause(struct btrfs_fs_info *fs_info); |
| 3363 | void btrfs_scrub_continue(struct btrfs_fs_info *fs_info); |
| 3364 | int btrfs_scrub_cancel(struct btrfs_fs_info *info); |
| 3365 | int btrfs_scrub_cancel_dev(struct btrfs_device *dev); |
| 3366 | int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid, |
| 3367 | struct btrfs_scrub_progress *progress); |
| 3368 | static inline void btrfs_init_full_stripe_locks_tree( |
| 3369 | struct btrfs_full_stripe_locks_tree *locks_root) |
| 3370 | { |
| 3371 | locks_root->root = RB_ROOT; |
| 3372 | mutex_init(&locks_root->lock); |
| 3373 | } |
| 3374 | |
| 3375 | /* dev-replace.c */ |
| 3376 | void btrfs_bio_counter_inc_blocked(struct btrfs_fs_info *fs_info); |
| 3377 | void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info); |
| 3378 | void btrfs_bio_counter_sub(struct btrfs_fs_info *fs_info, s64 amount); |
| 3379 | |
| 3380 | static inline void btrfs_bio_counter_dec(struct btrfs_fs_info *fs_info) |
| 3381 | { |
| 3382 | btrfs_bio_counter_sub(fs_info, 1); |
| 3383 | } |
| 3384 | |
| 3385 | /* reada.c */ |
| 3386 | struct reada_control { |
| 3387 | struct btrfs_fs_info *fs_info; /* tree to prefetch */ |
| 3388 | struct btrfs_key key_start; |
| 3389 | struct btrfs_key key_end; /* exclusive */ |
| 3390 | atomic_t elems; |
| 3391 | struct kref refcnt; |
| 3392 | wait_queue_head_t wait; |
| 3393 | }; |
| 3394 | struct reada_control *btrfs_reada_add(struct btrfs_root *root, |
| 3395 | struct btrfs_key *start, struct btrfs_key *end); |
| 3396 | int btrfs_reada_wait(void *handle); |
| 3397 | void btrfs_reada_detach(void *handle); |
| 3398 | int btree_readahead_hook(struct extent_buffer *eb, int err); |
| 3399 | |
| 3400 | static inline int is_fstree(u64 rootid) |
| 3401 | { |
| 3402 | if (rootid == BTRFS_FS_TREE_OBJECTID || |
| 3403 | ((s64)rootid >= (s64)BTRFS_FIRST_FREE_OBJECTID && |
| 3404 | !btrfs_qgroup_level(rootid))) |
| 3405 | return 1; |
| 3406 | return 0; |
| 3407 | } |
| 3408 | |
| 3409 | static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info) |
| 3410 | { |
| 3411 | return signal_pending(current); |
| 3412 | } |
| 3413 | |
| 3414 | #define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len)) |
| 3415 | |
| 3416 | /* Sanity test specific functions */ |
| 3417 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
| 3418 | void btrfs_test_inode_set_ops(struct inode *inode); |
| 3419 | void btrfs_test_destroy_inode(struct inode *inode); |
| 3420 | |
| 3421 | static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) |
| 3422 | { |
| 3423 | return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state); |
| 3424 | } |
| 3425 | #else |
| 3426 | static inline int btrfs_is_testing(struct btrfs_fs_info *fs_info) |
| 3427 | { |
| 3428 | return 0; |
| 3429 | } |
| 3430 | #endif |
| 3431 | |
| 3432 | #endif |