xref: /linux/fs/btrfs/btrfs_inode.h (revision 93d4e8bb3f137e8037a65ea96f175f81c25c50e5)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2007 Oracle.  All rights reserved.
4  */
5 
6 #ifndef BTRFS_INODE_H
7 #define BTRFS_INODE_H
8 
9 #include <linux/hash.h>
10 #include <linux/refcount.h>
11 #include <linux/spinlock.h>
12 #include <linux/mutex.h>
13 #include <linux/rwsem.h>
14 #include <linux/fs.h>
15 #include <linux/mm.h>
16 #include <linux/compiler.h>
17 #include <linux/fscrypt.h>
18 #include <linux/lockdep.h>
19 #include <uapi/linux/btrfs_tree.h>
20 #include <trace/events/btrfs.h>
21 #include "block-rsv.h"
22 #include "btrfs_inode.h"
23 #include "extent_map.h"
24 #include "extent_io.h"
25 #include "extent-io-tree.h"
26 #include "ordered-data.h"
27 #include "delayed-inode.h"
28 
29 struct extent_state;
30 struct posix_acl;
31 struct iov_iter;
32 struct writeback_control;
33 struct btrfs_root;
34 struct btrfs_fs_info;
35 struct btrfs_trans_handle;
36 
37 /*
38  * Since we search a directory based on f_pos (struct dir_context::pos) we have
39  * to start at 2 since '.' and '..' have f_pos of 0 and 1 respectively, so
40  * everybody else has to start at 2 (see btrfs_real_readdir() and dir_emit_dots()).
41  */
42 #define BTRFS_DIR_START_INDEX 2
43 
44 /*
45  * ordered_data_close is set by truncate when a file that used
46  * to have good data has been truncated to zero.  When it is set
47  * the btrfs file release call will add this inode to the
48  * ordered operations list so that we make sure to flush out any
49  * new data the application may have written before commit.
50  */
51 enum {
52 	BTRFS_INODE_FLUSH_ON_CLOSE,
53 	BTRFS_INODE_DUMMY,
54 	BTRFS_INODE_IN_DEFRAG,
55 	BTRFS_INODE_HAS_ASYNC_EXTENT,
56 	 /*
57 	  * Always set under the VFS' inode lock, otherwise it can cause races
58 	  * during fsync (we start as a fast fsync and then end up in a full
59 	  * fsync racing with ordered extent completion).
60 	  */
61 	BTRFS_INODE_NEEDS_FULL_SYNC,
62 	BTRFS_INODE_COPY_EVERYTHING,
63 	BTRFS_INODE_HAS_PROPS,
64 	BTRFS_INODE_SNAPSHOT_FLUSH,
65 	/*
66 	 * Set and used when logging an inode and it serves to signal that an
67 	 * inode does not have xattrs, so subsequent fsyncs can avoid searching
68 	 * for xattrs to log. This bit must be cleared whenever a xattr is added
69 	 * to an inode.
70 	 */
71 	BTRFS_INODE_NO_XATTRS,
72 	/*
73 	 * Set when we are in a context where we need to start a transaction and
74 	 * have dirty pages with the respective file range locked. This is to
75 	 * ensure that when reserving space for the transaction, if we are low
76 	 * on available space and need to flush delalloc, we will not flush
77 	 * delalloc for this inode, because that could result in a deadlock (on
78 	 * the file range, inode's io_tree).
79 	 */
80 	BTRFS_INODE_NO_DELALLOC_FLUSH,
81 	/*
82 	 * Set when we are working on enabling verity for a file. Computing and
83 	 * writing the whole Merkle tree can take a while so we want to prevent
84 	 * races where two separate tasks attempt to simultaneously start verity
85 	 * on the same file.
86 	 */
87 	BTRFS_INODE_VERITY_IN_PROGRESS,
88 	/* Set when this inode is a free space inode. */
89 	BTRFS_INODE_FREE_SPACE_INODE,
90 	/* Set when there are no capabilities in XATTs for the inode. */
91 	BTRFS_INODE_NO_CAP_XATTR,
92 	/*
93 	 * Set if an error happened when doing a COW write before submitting a
94 	 * bio or during writeback. Used for both buffered writes and direct IO
95 	 * writes. This is to signal a fast fsync that it has to wait for
96 	 * ordered extents to complete and therefore not log extent maps that
97 	 * point to unwritten extents (when an ordered extent completes and it
98 	 * has the BTRFS_ORDERED_IOERR flag set, it drops extent maps in its
99 	 * range).
100 	 */
101 	BTRFS_INODE_COW_WRITE_ERROR,
102 };
103 
104 /* in memory btrfs inode */
105 struct btrfs_inode {
106 	/* which subvolume this inode belongs to */
107 	struct btrfs_root *root;
108 
109 	/* key used to find this inode on disk.  This is used by the code
110 	 * to read in roots of subvolumes
111 	 */
112 	struct btrfs_key location;
113 
114 	/* Cached value of inode property 'compression'. */
115 	u8 prop_compress;
116 
117 	/*
118 	 * Force compression on the file using the defrag ioctl, could be
119 	 * different from prop_compress and takes precedence if set.
120 	 */
121 	u8 defrag_compress;
122 
123 	/*
124 	 * Lock for counters and all fields used to determine if the inode is in
125 	 * the log or not (last_trans, last_sub_trans, last_log_commit,
126 	 * logged_trans), to access/update delalloc_bytes, new_delalloc_bytes,
127 	 * defrag_bytes, disk_i_size, outstanding_extents, csum_bytes and to
128 	 * update the VFS' inode number of bytes used.
129 	 */
130 	spinlock_t lock;
131 
132 	/* the extent_tree has caches of all the extent mappings to disk */
133 	struct extent_map_tree extent_tree;
134 
135 	/* the io_tree does range state (DIRTY, LOCKED etc) */
136 	struct extent_io_tree io_tree;
137 
138 	/*
139 	 * Keep track of where the inode has extent items mapped in order to
140 	 * make sure the i_size adjustments are accurate. Not required when the
141 	 * filesystem is NO_HOLES, the status can't be set while mounted as
142 	 * it's a mkfs-time feature.
143 	 */
144 	struct extent_io_tree *file_extent_tree;
145 
146 	/* held while logging the inode in tree-log.c */
147 	struct mutex log_mutex;
148 
149 	/*
150 	 * Counters to keep track of the number of extent item's we may use due
151 	 * to delalloc and such.  outstanding_extents is the number of extent
152 	 * items we think we'll end up using, and reserved_extents is the number
153 	 * of extent items we've reserved metadata for. Protected by 'lock'.
154 	 */
155 	unsigned outstanding_extents;
156 
157 	/* used to order data wrt metadata */
158 	spinlock_t ordered_tree_lock;
159 	struct rb_root ordered_tree;
160 	struct rb_node *ordered_tree_last;
161 
162 	/* list of all the delalloc inodes in the FS.  There are times we need
163 	 * to write all the delalloc pages to disk, and this list is used
164 	 * to walk them all.
165 	 */
166 	struct list_head delalloc_inodes;
167 
168 	/* node for the red-black tree that links inodes in subvolume root */
169 	struct rb_node rb_node;
170 
171 	unsigned long runtime_flags;
172 
173 	/* full 64 bit generation number, struct vfs_inode doesn't have a big
174 	 * enough field for this.
175 	 */
176 	u64 generation;
177 
178 	/*
179 	 * ID of the transaction handle that last modified this inode.
180 	 * Protected by 'lock'.
181 	 */
182 	u64 last_trans;
183 
184 	/*
185 	 * ID of the transaction that last logged this inode.
186 	 * Protected by 'lock'.
187 	 */
188 	u64 logged_trans;
189 
190 	/*
191 	 * Log transaction ID when this inode was last modified.
192 	 * Protected by 'lock'.
193 	 */
194 	int last_sub_trans;
195 
196 	/* A local copy of root's last_log_commit. Protected by 'lock'. */
197 	int last_log_commit;
198 
199 	union {
200 		/*
201 		 * Total number of bytes pending delalloc, used by stat to
202 		 * calculate the real block usage of the file. This is used
203 		 * only for files. Protected by 'lock'.
204 		 */
205 		u64 delalloc_bytes;
206 		/*
207 		 * The lowest possible index of the next dir index key which
208 		 * points to an inode that needs to be logged.
209 		 * This is used only for directories.
210 		 * Use the helpers btrfs_get_first_dir_index_to_log() and
211 		 * btrfs_set_first_dir_index_to_log() to access this field.
212 		 */
213 		u64 first_dir_index_to_log;
214 	};
215 
216 	union {
217 		/*
218 		 * Total number of bytes pending delalloc that fall within a file
219 		 * range that is either a hole or beyond EOF (and no prealloc extent
220 		 * exists in the range). This is always <= delalloc_bytes and this
221 		 * is used only for files. Protected by 'lock'.
222 		 */
223 		u64 new_delalloc_bytes;
224 		/*
225 		 * The offset of the last dir index key that was logged.
226 		 * This is used only for directories.
227 		 */
228 		u64 last_dir_index_offset;
229 	};
230 
231 	/*
232 	 * Total number of bytes pending defrag, used by stat to check whether
233 	 * it needs COW. Protected by 'lock'.
234 	 */
235 	u64 defrag_bytes;
236 
237 	/*
238 	 * The size of the file stored in the metadata on disk.  data=ordered
239 	 * means the in-memory i_size might be larger than the size on disk
240 	 * because not all the blocks are written yet. Protected by 'lock'.
241 	 */
242 	u64 disk_i_size;
243 
244 	/*
245 	 * If this is a directory then index_cnt is the counter for the index
246 	 * number for new files that are created. For an empty directory, this
247 	 * must be initialized to BTRFS_DIR_START_INDEX.
248 	 */
249 	u64 index_cnt;
250 
251 	/* Cache the directory index number to speed the dir/file remove */
252 	u64 dir_index;
253 
254 	/* the fsync log has some corner cases that mean we have to check
255 	 * directories to see if any unlinks have been done before
256 	 * the directory was logged.  See tree-log.c for all the
257 	 * details
258 	 */
259 	u64 last_unlink_trans;
260 
261 	/*
262 	 * The id/generation of the last transaction where this inode was
263 	 * either the source or the destination of a clone/dedupe operation.
264 	 * Used when logging an inode to know if there are shared extents that
265 	 * need special care when logging checksum items, to avoid duplicate
266 	 * checksum items in a log (which can lead to a corruption where we end
267 	 * up with missing checksum ranges after log replay).
268 	 * Protected by the vfs inode lock.
269 	 */
270 	u64 last_reflink_trans;
271 
272 	/*
273 	 * Number of bytes outstanding that are going to need csums.  This is
274 	 * used in ENOSPC accounting. Protected by 'lock'.
275 	 */
276 	u64 csum_bytes;
277 
278 	/* Backwards incompatible flags, lower half of inode_item::flags  */
279 	u32 flags;
280 	/* Read-only compatibility flags, upper half of inode_item::flags */
281 	u32 ro_flags;
282 
283 	struct btrfs_block_rsv block_rsv;
284 
285 	struct btrfs_delayed_node *delayed_node;
286 
287 	/* File creation time. */
288 	u64 i_otime_sec;
289 	u32 i_otime_nsec;
290 
291 	/* Hook into fs_info->delayed_iputs */
292 	struct list_head delayed_iput;
293 
294 	struct rw_semaphore i_mmap_lock;
295 	struct inode vfs_inode;
296 };
297 
298 static inline u64 btrfs_get_first_dir_index_to_log(const struct btrfs_inode *inode)
299 {
300 	return READ_ONCE(inode->first_dir_index_to_log);
301 }
302 
303 static inline void btrfs_set_first_dir_index_to_log(struct btrfs_inode *inode,
304 						    u64 index)
305 {
306 	WRITE_ONCE(inode->first_dir_index_to_log, index);
307 }
308 
309 static inline struct btrfs_inode *BTRFS_I(const struct inode *inode)
310 {
311 	return container_of(inode, struct btrfs_inode, vfs_inode);
312 }
313 
314 static inline unsigned long btrfs_inode_hash(u64 objectid,
315 					     const struct btrfs_root *root)
316 {
317 	u64 h = objectid ^ (root->root_key.objectid * GOLDEN_RATIO_PRIME);
318 
319 #if BITS_PER_LONG == 32
320 	h = (h >> 32) ^ (h & 0xffffffff);
321 #endif
322 
323 	return (unsigned long)h;
324 }
325 
326 #if BITS_PER_LONG == 32
327 
328 /*
329  * On 32 bit systems the i_ino of struct inode is 32 bits (unsigned long), so
330  * we use the inode's location objectid which is a u64 to avoid truncation.
331  */
332 static inline u64 btrfs_ino(const struct btrfs_inode *inode)
333 {
334 	u64 ino = inode->location.objectid;
335 
336 	/* type == BTRFS_ROOT_ITEM_KEY: subvol dir */
337 	if (inode->location.type == BTRFS_ROOT_ITEM_KEY)
338 		ino = inode->vfs_inode.i_ino;
339 	return ino;
340 }
341 
342 #else
343 
344 static inline u64 btrfs_ino(const struct btrfs_inode *inode)
345 {
346 	return inode->vfs_inode.i_ino;
347 }
348 
349 #endif
350 
351 static inline void btrfs_i_size_write(struct btrfs_inode *inode, u64 size)
352 {
353 	i_size_write(&inode->vfs_inode, size);
354 	inode->disk_i_size = size;
355 }
356 
357 static inline bool btrfs_is_free_space_inode(struct btrfs_inode *inode)
358 {
359 	return test_bit(BTRFS_INODE_FREE_SPACE_INODE, &inode->runtime_flags);
360 }
361 
362 static inline bool is_data_inode(struct inode *inode)
363 {
364 	return btrfs_ino(BTRFS_I(inode)) != BTRFS_BTREE_INODE_OBJECTID;
365 }
366 
367 static inline void btrfs_mod_outstanding_extents(struct btrfs_inode *inode,
368 						 int mod)
369 {
370 	lockdep_assert_held(&inode->lock);
371 	inode->outstanding_extents += mod;
372 	if (btrfs_is_free_space_inode(inode))
373 		return;
374 	trace_btrfs_inode_mod_outstanding_extents(inode->root, btrfs_ino(inode),
375 						  mod, inode->outstanding_extents);
376 }
377 
378 /*
379  * Called every time after doing a buffered, direct IO or memory mapped write.
380  *
381  * This is to ensure that if we write to a file that was previously fsynced in
382  * the current transaction, then try to fsync it again in the same transaction,
383  * we will know that there were changes in the file and that it needs to be
384  * logged.
385  */
386 static inline void btrfs_set_inode_last_sub_trans(struct btrfs_inode *inode)
387 {
388 	spin_lock(&inode->lock);
389 	inode->last_sub_trans = inode->root->log_transid;
390 	spin_unlock(&inode->lock);
391 }
392 
393 /*
394  * Should be called while holding the inode's VFS lock in exclusive mode, or
395  * while holding the inode's mmap lock (struct btrfs_inode::i_mmap_lock) in
396  * either shared or exclusive mode, or in a context where no one else can access
397  * the inode concurrently (during inode creation or when loading an inode from
398  * disk).
399  */
400 static inline void btrfs_set_inode_full_sync(struct btrfs_inode *inode)
401 {
402 	set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags);
403 	/*
404 	 * The inode may have been part of a reflink operation in the last
405 	 * transaction that modified it, and then a fsync has reset the
406 	 * last_reflink_trans to avoid subsequent fsyncs in the same
407 	 * transaction to do unnecessary work. So update last_reflink_trans
408 	 * to the last_trans value (we have to be pessimistic and assume a
409 	 * reflink happened).
410 	 *
411 	 * The ->last_trans is protected by the inode's spinlock and we can
412 	 * have a concurrent ordered extent completion update it. Also set
413 	 * last_reflink_trans to ->last_trans only if the former is less than
414 	 * the later, because we can be called in a context where
415 	 * last_reflink_trans was set to the current transaction generation
416 	 * while ->last_trans was not yet updated in the current transaction,
417 	 * and therefore has a lower value.
418 	 */
419 	spin_lock(&inode->lock);
420 	if (inode->last_reflink_trans < inode->last_trans)
421 		inode->last_reflink_trans = inode->last_trans;
422 	spin_unlock(&inode->lock);
423 }
424 
425 static inline bool btrfs_inode_in_log(struct btrfs_inode *inode, u64 generation)
426 {
427 	bool ret = false;
428 
429 	spin_lock(&inode->lock);
430 	if (inode->logged_trans == generation &&
431 	    inode->last_sub_trans <= inode->last_log_commit &&
432 	    inode->last_sub_trans <= btrfs_get_root_last_log_commit(inode->root))
433 		ret = true;
434 	spin_unlock(&inode->lock);
435 	return ret;
436 }
437 
438 /*
439  * Check if the inode has flags compatible with compression
440  */
441 static inline bool btrfs_inode_can_compress(const struct btrfs_inode *inode)
442 {
443 	if (inode->flags & BTRFS_INODE_NODATACOW ||
444 	    inode->flags & BTRFS_INODE_NODATASUM)
445 		return false;
446 	return true;
447 }
448 
449 /* Array of bytes with variable length, hexadecimal format 0x1234 */
450 #define CSUM_FMT				"0x%*phN"
451 #define CSUM_FMT_VALUE(size, bytes)		size, bytes
452 
453 int btrfs_check_sector_csum(struct btrfs_fs_info *fs_info, struct page *page,
454 			    u32 pgoff, u8 *csum, const u8 * const csum_expected);
455 bool btrfs_data_csum_ok(struct btrfs_bio *bbio, struct btrfs_device *dev,
456 			u32 bio_offset, struct bio_vec *bv);
457 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
458 			      u64 *orig_start, u64 *orig_block_len,
459 			      u64 *ram_bytes, bool nowait, bool strict);
460 
461 void btrfs_del_delalloc_inode(struct btrfs_inode *inode);
462 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
463 int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
464 int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
465 		       struct btrfs_inode *dir, struct btrfs_inode *inode,
466 		       const struct fscrypt_str *name);
467 int btrfs_add_link(struct btrfs_trans_handle *trans,
468 		   struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
469 		   const struct fscrypt_str *name, int add_backref, u64 index);
470 int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry);
471 int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
472 			 int front);
473 
474 int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context);
475 int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr,
476 			       bool in_reclaim_context);
477 int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
478 			      unsigned int extra_bits,
479 			      struct extent_state **cached_state);
480 
481 struct btrfs_new_inode_args {
482 	/* Input */
483 	struct inode *dir;
484 	struct dentry *dentry;
485 	struct inode *inode;
486 	bool orphan;
487 	bool subvol;
488 
489 	/* Output from btrfs_new_inode_prepare(), input to btrfs_create_new_inode(). */
490 	struct posix_acl *default_acl;
491 	struct posix_acl *acl;
492 	struct fscrypt_name fname;
493 };
494 
495 int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args,
496 			    unsigned int *trans_num_items);
497 int btrfs_create_new_inode(struct btrfs_trans_handle *trans,
498 			   struct btrfs_new_inode_args *args);
499 void btrfs_new_inode_args_destroy(struct btrfs_new_inode_args *args);
500 struct inode *btrfs_new_subvol_inode(struct mnt_idmap *idmap,
501 				     struct inode *dir);
502  void btrfs_set_delalloc_extent(struct btrfs_inode *inode, struct extent_state *state,
503 			        u32 bits);
504 void btrfs_clear_delalloc_extent(struct btrfs_inode *inode,
505 				 struct extent_state *state, u32 bits);
506 void btrfs_merge_delalloc_extent(struct btrfs_inode *inode, struct extent_state *new,
507 				 struct extent_state *other);
508 void btrfs_split_delalloc_extent(struct btrfs_inode *inode,
509 				 struct extent_state *orig, u64 split);
510 void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end);
511 void btrfs_evict_inode(struct inode *inode);
512 struct inode *btrfs_alloc_inode(struct super_block *sb);
513 void btrfs_destroy_inode(struct inode *inode);
514 void btrfs_free_inode(struct inode *inode);
515 int btrfs_drop_inode(struct inode *inode);
516 int __init btrfs_init_cachep(void);
517 void __cold btrfs_destroy_cachep(void);
518 struct inode *btrfs_iget_path(struct super_block *s, u64 ino,
519 			      struct btrfs_root *root, struct btrfs_path *path);
520 struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root);
521 struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
522 				    struct page *page, u64 start, u64 len);
523 int btrfs_update_inode(struct btrfs_trans_handle *trans,
524 		       struct btrfs_inode *inode);
525 int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
526 				struct btrfs_inode *inode);
527 int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct btrfs_inode *inode);
528 int btrfs_orphan_cleanup(struct btrfs_root *root);
529 int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
530 void btrfs_add_delayed_iput(struct btrfs_inode *inode);
531 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
532 int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
533 int btrfs_prealloc_file_range(struct inode *inode, int mode,
534 			      u64 start, u64 num_bytes, u64 min_size,
535 			      loff_t actual_len, u64 *alloc_hint);
536 int btrfs_prealloc_file_range_trans(struct inode *inode,
537 				    struct btrfs_trans_handle *trans, int mode,
538 				    u64 start, u64 num_bytes, u64 min_size,
539 				    loff_t actual_len, u64 *alloc_hint);
540 int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page,
541 			     u64 start, u64 end, struct writeback_control *wbc);
542 int btrfs_writepage_cow_fixup(struct page *page);
543 int btrfs_encoded_io_compression_from_extent(struct btrfs_fs_info *fs_info,
544 					     int compress_type);
545 int btrfs_encoded_read_regular_fill_pages(struct btrfs_inode *inode,
546 					  u64 file_offset, u64 disk_bytenr,
547 					  u64 disk_io_size,
548 					  struct page **pages);
549 ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter,
550 			   struct btrfs_ioctl_encoded_io_args *encoded);
551 ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from,
552 			       const struct btrfs_ioctl_encoded_io_args *encoded);
553 
554 ssize_t btrfs_dio_read(struct kiocb *iocb, struct iov_iter *iter,
555 		       size_t done_before);
556 struct iomap_dio *btrfs_dio_write(struct kiocb *iocb, struct iov_iter *iter,
557 				  size_t done_before);
558 struct btrfs_inode *btrfs_find_first_inode(struct btrfs_root *root, u64 min_ino);
559 
560 extern const struct dentry_operations btrfs_dentry_operations;
561 
562 /* Inode locking type flags, by default the exclusive lock is taken. */
563 enum btrfs_ilock_type {
564 	ENUM_BIT(BTRFS_ILOCK_SHARED),
565 	ENUM_BIT(BTRFS_ILOCK_TRY),
566 	ENUM_BIT(BTRFS_ILOCK_MMAP),
567 };
568 
569 int btrfs_inode_lock(struct btrfs_inode *inode, unsigned int ilock_flags);
570 void btrfs_inode_unlock(struct btrfs_inode *inode, unsigned int ilock_flags);
571 void btrfs_update_inode_bytes(struct btrfs_inode *inode, const u64 add_bytes,
572 			      const u64 del_bytes);
573 void btrfs_assert_inode_range_clean(struct btrfs_inode *inode, u64 start, u64 end);
574 
575 #endif
576