btrfs_inode.h

  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 "ctree.h"
 22#include "block-rsv.h"
 23#include "extent_map.h"
 24#include "extent-io-tree.h"
 25
 26struct posix_acl;
 27struct iov_iter;
 28struct writeback_control;
 29struct btrfs_root;
 30struct btrfs_fs_info;
 31struct btrfs_trans_handle;
 32struct btrfs_bio;
 33struct btrfs_file_extent;
 34struct btrfs_delayed_node;
 35
 36/*
 37 * Since we search a directory based on f_pos (struct dir_context::pos) we have
 38 * to start at 2 since '.' and '..' have f_pos of 0 and 1 respectively, so
 39 * everybody else has to start at 2 (see btrfs_real_readdir() and dir_emit_dots()).
 40 */
 41#define BTRFS_DIR_START_INDEX 2
 42
 43/*
 44 * ordered_data_close is set by truncate when a file that used
 45 * to have good data has been truncated to zero.  When it is set
 46 * the btrfs file release call will add this inode to the
 47 * ordered operations list so that we make sure to flush out any
 48 * new data the application may have written before commit.
 49 */
 50enum {
 51	BTRFS_INODE_FLUSH_ON_CLOSE,
 52	BTRFS_INODE_DUMMY,
 53	BTRFS_INODE_IN_DEFRAG,
 54	BTRFS_INODE_HAS_ASYNC_EXTENT,
 55	 /*
 56	  * Always set under the VFS' inode lock, otherwise it can cause races
 57	  * during fsync (we start as a fast fsync and then end up in a full
 58	  * fsync racing with ordered extent completion).
 59	  */
 60	BTRFS_INODE_NEEDS_FULL_SYNC,
 61	BTRFS_INODE_COPY_EVERYTHING,
 62	BTRFS_INODE_HAS_PROPS,
 63	BTRFS_INODE_SNAPSHOT_FLUSH,
 64	/*
 65	 * Set and used when logging an inode and it serves to signal that an
 66	 * inode does not have xattrs, so subsequent fsyncs can avoid searching
 67	 * for xattrs to log. This bit must be cleared whenever a xattr is added
 68	 * to an inode.
 69	 */
 70	BTRFS_INODE_NO_XATTRS,
 71	/*
 72	 * Set when we are in a context where we need to start a transaction and
 73	 * have dirty pages with the respective file range locked. This is to
 74	 * ensure that when reserving space for the transaction, if we are low
 75	 * on available space and need to flush delalloc, we will not flush
 76	 * delalloc for this inode, because that could result in a deadlock (on
 77	 * the file range, inode's io_tree).
 78	 */
 79	BTRFS_INODE_NO_DELALLOC_FLUSH,
 80	/*
 81	 * Set when we are working on enabling verity for a file. Computing and
 82	 * writing the whole Merkle tree can take a while so we want to prevent
 83	 * races where two separate tasks attempt to simultaneously start verity
 84	 * on the same file.
 85	 */
 86	BTRFS_INODE_VERITY_IN_PROGRESS,
 87	/* Set when this inode is a free space inode. */
 88	BTRFS_INODE_FREE_SPACE_INODE,
 89	/* Set when there are no capabilities in XATTs for the inode. */
 90	BTRFS_INODE_NO_CAP_XATTR,
 91	/*
 92	 * Set if an error happened when doing a COW write before submitting a
 93	 * bio or during writeback. Used for both buffered writes and direct IO
 94	 * writes. This is to signal a fast fsync that it has to wait for
 95	 * ordered extents to complete and therefore not log extent maps that
 96	 * point to unwritten extents (when an ordered extent completes and it
 97	 * has the BTRFS_ORDERED_IOERR flag set, it drops extent maps in its
 98	 * range).
 99	 */
100	BTRFS_INODE_COW_WRITE_ERROR,
101	/*
102	 * Indicate this is a directory that points to a subvolume for which
103	 * there is no root reference item. That's a case like the following:
104	 *
105	 *   $ btrfs subvolume create /mnt/parent
106	 *   $ btrfs subvolume create /mnt/parent/child
107	 *   $ btrfs subvolume snapshot /mnt/parent /mnt/snap
108	 *
109	 * If subvolume "parent" is root 256, subvolume "child" is root 257 and
110	 * snapshot "snap" is root 258, then there's no root reference item (key
111	 * BTRFS_ROOT_REF_KEY in the root tree) for the subvolume "child"
112	 * associated to root 258 (the snapshot) - there's only for the root
113	 * of the "parent" subvolume (root 256). In the chunk root we have a
114	 * (256 BTRFS_ROOT_REF_KEY 257) key but we don't have a
115	 * (258 BTRFS_ROOT_REF_KEY 257) key - the sames goes for backrefs, we
116	 * have a (257 BTRFS_ROOT_BACKREF_KEY 256) but we don't have a
117	 * (257 BTRFS_ROOT_BACKREF_KEY 258) key.
118	 *
119	 * So when opening the "child" dentry from the snapshot's directory,
120	 * we don't find a root ref item and we create a stub inode. This is
121	 * done at new_simple_dir(), called from btrfs_lookup_dentry().
122	 */
123	BTRFS_INODE_ROOT_STUB,
124};
125
126/* in memory btrfs inode */
127struct btrfs_inode {
128	/* which subvolume this inode belongs to */
129	struct btrfs_root *root;
130
131#if BITS_PER_LONG == 32
132	/*
133	 * The objectid of the corresponding BTRFS_INODE_ITEM_KEY.
134	 * On 64 bits platforms we can get it from vfs_inode.i_ino, which is an
135	 * unsigned long and therefore 64 bits on such platforms.
136	 */
137	u64 objectid;
138#endif
139
140	/* Cached value of inode property 'compression'. */
141	u8 prop_compress;
142
143	/*
144	 * Force compression on the file using the defrag ioctl, could be
145	 * different from prop_compress and takes precedence if set.
146	 */
147	u8 defrag_compress;
148	s8 defrag_compress_level;
149
150	/*
151	 * Lock for counters and all fields used to determine if the inode is in
152	 * the log or not (last_trans, last_sub_trans, last_log_commit,
153	 * logged_trans), to access/update delalloc_bytes, new_delalloc_bytes,
154	 * defrag_bytes, disk_i_size, outstanding_extents, csum_bytes and to
155	 * update the VFS' inode number of bytes used.
156	 * Also protects setting struct file::private_data.
157	 */
158	spinlock_t lock;
159
160	/* the extent_tree has caches of all the extent mappings to disk */
161	struct extent_map_tree extent_tree;
162
163	/* the io_tree does range state (DIRTY, LOCKED etc) */
164	struct extent_io_tree io_tree;
165
166	/*
167	 * Keep track of where the inode has extent items mapped in order to
168	 * make sure the i_size adjustments are accurate. Not required when the
169	 * filesystem is NO_HOLES, the status can't be set while mounted as
170	 * it's a mkfs-time feature.
171	 */
172	struct extent_io_tree *file_extent_tree;
173
174	/* held while logging the inode in tree-log.c */
175	struct mutex log_mutex;
176
177	/*
178	 * Counters to keep track of the number of extent item's we may use due
179	 * to delalloc and such.  outstanding_extents is the number of extent
180	 * items we think we'll end up using, and reserved_extents is the number
181	 * of extent items we've reserved metadata for. Protected by 'lock'.
182	 */
183	unsigned outstanding_extents;
184
185	/* used to order data wrt metadata */
186	spinlock_t ordered_tree_lock;
187	struct rb_root ordered_tree;
188	struct rb_node *ordered_tree_last;
189
190	/* list of all the delalloc inodes in the FS.  There are times we need
191	 * to write all the delalloc pages to disk, and this list is used
192	 * to walk them all.
193	 */
194	struct list_head delalloc_inodes;
195
196	unsigned long runtime_flags;
197
198	/* full 64 bit generation number, struct vfs_inode doesn't have a big
199	 * enough field for this.
200	 */
201	u64 generation;
202
203	/*
204	 * ID of the transaction handle that last modified this inode.
205	 * Protected by 'lock'.
206	 */
207	u64 last_trans;
208
209	/*
210	 * ID of the transaction that last logged this inode.
211	 * Protected by 'lock'.
212	 */
213	u64 logged_trans;
214
215	/*
216	 * Log transaction ID when this inode was last modified.
217	 * Protected by 'lock'.
218	 */
219	int last_sub_trans;
220
221	/* A local copy of root's last_log_commit. Protected by 'lock'. */
222	int last_log_commit;
223
224	union {
225		/*
226		 * Total number of bytes pending delalloc, used by stat to
227		 * calculate the real block usage of the file. This is used
228		 * only for files. Protected by 'lock'.
229		 */
230		u64 delalloc_bytes;
231		/*
232		 * The lowest possible index of the next dir index key which
233		 * points to an inode that needs to be logged.
234		 * This is used only for directories.
235		 * Use the helpers btrfs_get_first_dir_index_to_log() and
236		 * btrfs_set_first_dir_index_to_log() to access this field.
237		 */
238		u64 first_dir_index_to_log;
239	};
240
241	union {
242		/*
243		 * Total number of bytes pending delalloc that fall within a file
244		 * range that is either a hole or beyond EOF (and no prealloc extent
245		 * exists in the range). This is always <= delalloc_bytes and this
246		 * is used only for files. Protected by 'lock'.
247		 */
248		u64 new_delalloc_bytes;
249		/*
250		 * The offset of the last dir index key that was logged.
251		 * This is used only for directories. Protected by 'log_mutex'.
252		 */
253		u64 last_dir_index_offset;
254	};
255
256	union {
257		/*
258		 * Total number of bytes pending defrag, used by stat to check whether
259		 * it needs COW. Protected by 'lock'.
260		 * Used by inodes other than the data relocation inode.
261		 */
262		u64 defrag_bytes;
263
264		/*
265		 * Logical address of the block group being relocated.
266		 * Used only by the data relocation inode.
267		 */
268		u64 reloc_block_group_start;
269	};
270
271	/*
272	 * The size of the file stored in the metadata on disk.  data=ordered
273	 * means the in-memory i_size might be larger than the size on disk
274	 * because not all the blocks are written yet. Protected by 'lock'.
275	 */
276	u64 disk_i_size;
277
278	union {
279		/*
280		 * If this is a directory then index_cnt is the counter for the
281		 * index number for new files that are created. For an empty
282		 * directory, this must be initialized to BTRFS_DIR_START_INDEX.
283		 */
284		u64 index_cnt;
285
286		/*
287		 * If this is not a directory, this is the number of bytes
288		 * outstanding that are going to need csums. This is used in
289		 * ENOSPC accounting. Protected by 'lock'.
290		 */
291		u64 csum_bytes;
292	};
293
294	/* Cache the directory index number to speed the dir/file remove */
295	u64 dir_index;
296
297	/* the fsync log has some corner cases that mean we have to check
298	 * directories to see if any unlinks have been done before
299	 * the directory was logged.  See tree-log.c for all the
300	 * details
301	 */
302	u64 last_unlink_trans;
303
304	union {
305		/*
306		 * The id/generation of the last transaction where this inode
307		 * was either the source or the destination of a clone/dedupe
308		 * operation. Used when logging an inode to know if there are
309		 * shared extents that need special care when logging checksum
310		 * items, to avoid duplicate checksum items in a log (which can
311		 * lead to a corruption where we end up with missing checksum
312		 * ranges after log replay). Protected by the VFS inode lock.
313		 * Used for regular files only.
314		 */
315		u64 last_reflink_trans;
316
317		/*
318		 * In case this a root stub inode (BTRFS_INODE_ROOT_STUB flag set),
319		 * the ID of that root.
320		 */
321		u64 ref_root_id;
322	};
323
324	/* Backwards incompatible flags, lower half of inode_item::flags  */
325	u32 flags;
326	/* Read-only compatibility flags, upper half of inode_item::flags */
327	u32 ro_flags;
328
329	struct btrfs_block_rsv block_rsv;
330
331	struct btrfs_delayed_node *delayed_node;
332
333	/* File creation time. */
334	u64 i_otime_sec;
335	u32 i_otime_nsec;
336
337	/* Hook into fs_info->delayed_iputs */
338	struct list_head delayed_iput;
339
340	struct rw_semaphore i_mmap_lock;
341
342#ifdef CONFIG_FS_VERITY
343	struct fsverity_info *i_verity_info;
344#endif
345
346	struct inode vfs_inode;
347};
348
349static inline u64 btrfs_get_first_dir_index_to_log(const struct btrfs_inode *inode)
350{
351	return READ_ONCE(inode->first_dir_index_to_log);
352}
353
354static inline void btrfs_set_first_dir_index_to_log(struct btrfs_inode *inode,
355						    u64 index)
356{
357	WRITE_ONCE(inode->first_dir_index_to_log, index);
358}
359
360/* Type checked and const-preserving VFS inode -> btrfs inode. */
361#define BTRFS_I(_inode)								\
362	_Generic(_inode,							\
363		 struct inode *: container_of(_inode, struct btrfs_inode, vfs_inode),	\
364		 const struct inode *: (const struct btrfs_inode *)container_of(	\
365					_inode, const struct btrfs_inode, vfs_inode))
366
367static inline unsigned long btrfs_inode_hash(u64 objectid,
368					     const struct btrfs_root *root)
369{
370	u64 h = objectid ^ (root->root_key.objectid * GOLDEN_RATIO_PRIME);
371
372#if BITS_PER_LONG == 32
373	h = (h >> 32) ^ (h & 0xffffffff);
374#endif
375
376	return (unsigned long)h;
377}
378
379#if BITS_PER_LONG == 32
380
381/*
382 * On 32 bit systems the i_ino of struct inode is 32 bits (unsigned long), so
383 * we use the inode's location objectid which is a u64 to avoid truncation.
384 */
385static inline u64 btrfs_ino(const struct btrfs_inode *inode)
386{
387	u64 ino = inode->objectid;
388
389	if (test_bit(BTRFS_INODE_ROOT_STUB, &inode->runtime_flags))
390		ino = inode->vfs_inode.i_ino;
391	return ino;
392}
393
394#else
395
396static inline u64 btrfs_ino(const struct btrfs_inode *inode)
397{
398	return inode->vfs_inode.i_ino;
399}
400
401#endif
402
403static inline void btrfs_get_inode_key(const struct btrfs_inode *inode,
404				       struct btrfs_key *key)
405{
406	key->objectid = btrfs_ino(inode);
407	key->type = BTRFS_INODE_ITEM_KEY;
408	key->offset = 0;
409}
410
411static inline void btrfs_set_inode_number(struct btrfs_inode *inode, u64 ino)
412{
413#if BITS_PER_LONG == 32
414	inode->objectid = ino;
415#endif
416	inode->vfs_inode.i_ino = ino;
417}
418
419static inline void btrfs_i_size_write(struct btrfs_inode *inode, u64 size)
420{
421	i_size_write(&inode->vfs_inode, size);
422	inode->disk_i_size = size;
423}
424
425static inline bool btrfs_is_free_space_inode(const struct btrfs_inode *inode)
426{
427	return test_bit(BTRFS_INODE_FREE_SPACE_INODE, &inode->runtime_flags);
428}
429
430static inline bool is_data_inode(const struct btrfs_inode *inode)
431{
432	return btrfs_ino(inode) != BTRFS_BTREE_INODE_OBJECTID;
433}
434
435static inline void btrfs_mod_outstanding_extents(struct btrfs_inode *inode,
436						 int mod)
437{
438	lockdep_assert_held(&inode->lock);
439	inode->outstanding_extents += mod;
440	if (btrfs_is_free_space_inode(inode))
441		return;
442	trace_btrfs_inode_mod_outstanding_extents(inode->root, btrfs_ino(inode),
443						  mod, inode->outstanding_extents);
444}
445
446/*
447 * Called every time after doing a buffered, direct IO or memory mapped write.
448 *
449 * This is to ensure that if we write to a file that was previously fsynced in
450 * the current transaction, then try to fsync it again in the same transaction,
451 * we will know that there were changes in the file and that it needs to be
452 * logged.
453 */
454static inline void btrfs_set_inode_last_sub_trans(struct btrfs_inode *inode)
455{
456	spin_lock(&inode->lock);
457	inode->last_sub_trans = inode->root->log_transid;
458	spin_unlock(&inode->lock);
459}
460
461/*
462 * Should be called while holding the inode's VFS lock in exclusive mode, or
463 * while holding the inode's mmap lock (struct btrfs_inode::i_mmap_lock) in
464 * either shared or exclusive mode, or in a context where no one else can access
465 * the inode concurrently (during inode creation or when loading an inode from
466 * disk).
467 */
468static inline void btrfs_set_inode_full_sync(struct btrfs_inode *inode)
469{
470	set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags);
471	/*
472	 * The inode may have been part of a reflink operation in the last
473	 * transaction that modified it, and then a fsync has reset the
474	 * last_reflink_trans to avoid subsequent fsyncs in the same
475	 * transaction to do unnecessary work. So update last_reflink_trans
476	 * to the last_trans value (we have to be pessimistic and assume a
477	 * reflink happened).
478	 *
479	 * The ->last_trans is protected by the inode's spinlock and we can
480	 * have a concurrent ordered extent completion update it. Also set
481	 * last_reflink_trans to ->last_trans only if the former is less than
482	 * the later, because we can be called in a context where
483	 * last_reflink_trans was set to the current transaction generation
484	 * while ->last_trans was not yet updated in the current transaction,
485	 * and therefore has a lower value.
486	 */
487	spin_lock(&inode->lock);
488	if (inode->last_reflink_trans < inode->last_trans)
489		inode->last_reflink_trans = inode->last_trans;
490	spin_unlock(&inode->lock);
491}
492
493static inline bool btrfs_inode_in_log(struct btrfs_inode *inode, u64 generation)
494{
495	bool ret = false;
496
497	spin_lock(&inode->lock);
498	if (inode->logged_trans == generation &&
499	    inode->last_sub_trans <= inode->last_log_commit &&
500	    inode->last_sub_trans <= btrfs_get_root_last_log_commit(inode->root))
501		ret = true;
502	spin_unlock(&inode->lock);
503	return ret;
504}
505
506/*
507 * Check if the inode has flags compatible with compression
508 */
509static inline bool btrfs_inode_can_compress(const struct btrfs_inode *inode)
510{
511	if (inode->flags & BTRFS_INODE_NODATACOW ||
512	    inode->flags & BTRFS_INODE_NODATASUM)
513		return false;
514	return true;
515}
516
517static inline void btrfs_assert_inode_locked(struct btrfs_inode *inode)
518{
519	/* Immediately trigger a crash if the inode is not locked. */
520	ASSERT(inode_is_locked(&inode->vfs_inode));
521	/* Trigger a splat in dmesg if this task is not holding the lock. */
522	lockdep_assert_held(&inode->vfs_inode.i_rwsem);
523}
524
525static inline void btrfs_update_inode_mapping_flags(struct btrfs_inode *inode)
526{
527	if (inode->flags & BTRFS_INODE_NODATASUM)
528		mapping_clear_stable_writes(inode->vfs_inode.i_mapping);
529	else
530		mapping_set_stable_writes(inode->vfs_inode.i_mapping);
531}
532
533static inline void btrfs_set_inode_mapping_order(struct btrfs_inode *inode)
534{
535	/* Metadata inode should not reach here. */
536	ASSERT(is_data_inode(inode));
537
538	/* We only allow BITS_PER_LONGS blocks for each bitmap. */
539#ifdef CONFIG_BTRFS_EXPERIMENTAL
540	mapping_set_folio_order_range(inode->vfs_inode.i_mapping,
541				      inode->root->fs_info->block_min_order,
542				      inode->root->fs_info->block_max_order);
543#endif
544}
545
546void btrfs_calculate_block_csum_folio(struct btrfs_fs_info *fs_info,
547				      const phys_addr_t paddr, u8 *dest);
548void btrfs_calculate_block_csum_pages(struct btrfs_fs_info *fs_info,
549				      const phys_addr_t paddrs[], u8 *dest);
550int btrfs_check_block_csum(struct btrfs_fs_info *fs_info, phys_addr_t paddr, u8 *csum,
551			   const u8 * const csum_expected);
552bool btrfs_data_csum_ok(struct btrfs_bio *bbio, struct btrfs_device *dev,
553			u32 bio_offset, const phys_addr_t paddrs[]);
554noinline int can_nocow_extent(struct btrfs_inode *inode, u64 offset, u64 *len,
555			      struct btrfs_file_extent *file_extent,
556			      bool nowait);
557
558void btrfs_del_delalloc_inode(struct btrfs_inode *inode);
559struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry);
560int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index);
561int btrfs_unlink_inode(struct btrfs_trans_handle *trans,
562		       struct btrfs_inode *dir, struct btrfs_inode *inode,
563		       const struct fscrypt_str *name);
564int btrfs_add_link(struct btrfs_trans_handle *trans,
565		   struct btrfs_inode *parent_inode, struct btrfs_inode *inode,
566		   const struct fscrypt_str *name, bool add_backref, u64 index);
567int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry);
568int btrfs_truncate_block(struct btrfs_inode *inode, u64 offset, u64 start, u64 end);
569
570int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context);
571int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr,
572			       bool in_reclaim_context);
573int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end,
574			      unsigned int extra_bits,
575			      struct extent_state **cached_state);
576
577struct btrfs_new_inode_args {
578	/* Input */
579	struct inode *dir;
580	struct dentry *dentry;
581	struct inode *inode;
582	bool orphan;
583	bool subvol;
584
585	/* Output from btrfs_new_inode_prepare(), input to btrfs_create_new_inode(). */
586	struct posix_acl *default_acl;
587	struct posix_acl *acl;
588	struct fscrypt_name fname;
589};
590
591int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args,
592			    unsigned int *trans_num_items);
593int btrfs_create_new_inode(struct btrfs_trans_handle *trans,
594			   struct btrfs_new_inode_args *args);
595void btrfs_new_inode_args_destroy(struct btrfs_new_inode_args *args);
596struct inode *btrfs_new_subvol_inode(struct mnt_idmap *idmap,
597				     struct inode *dir);
598 void btrfs_set_delalloc_extent(struct btrfs_inode *inode, struct extent_state *state,
599			        u32 bits);
600void btrfs_clear_delalloc_extent(struct btrfs_inode *inode,
601				 struct extent_state *state, u32 bits);
602void btrfs_merge_delalloc_extent(struct btrfs_inode *inode, struct extent_state *new,
603				 struct extent_state *other);
604void btrfs_split_delalloc_extent(struct btrfs_inode *inode,
605				 struct extent_state *orig, u64 split);
606void btrfs_evict_inode(struct inode *inode);
607struct inode *btrfs_alloc_inode(struct super_block *sb);
608void btrfs_destroy_inode(struct inode *inode);
609void btrfs_free_inode(struct inode *inode);
610int btrfs_drop_inode(struct inode *inode);
611int __init btrfs_init_cachep(void);
612void __cold btrfs_destroy_cachep(void);
613struct btrfs_inode *btrfs_iget_path(u64 ino, struct btrfs_root *root,
614				    struct btrfs_path *path);
615struct btrfs_inode *btrfs_iget(u64 ino, struct btrfs_root *root);
616struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
617				    struct folio *folio, u64 start, u64 len);
618int btrfs_update_inode(struct btrfs_trans_handle *trans,
619		       struct btrfs_inode *inode);
620int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans,
621				struct btrfs_inode *inode);
622int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct btrfs_inode *inode);
623int btrfs_orphan_cleanup(struct btrfs_root *root);
624int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size);
625void btrfs_add_delayed_iput(struct btrfs_inode *inode);
626void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
627int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
628int btrfs_prealloc_file_range(struct inode *inode, int mode,
629			      u64 start, u64 num_bytes, u64 min_size,
630			      loff_t actual_len, u64 *alloc_hint);
631int btrfs_prealloc_file_range_trans(struct inode *inode,
632				    struct btrfs_trans_handle *trans, int mode,
633				    u64 start, u64 num_bytes, u64 min_size,
634				    loff_t actual_len, u64 *alloc_hint);
635int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct folio *locked_folio,
636			     u64 start, u64 end, struct writeback_control *wbc);
637int btrfs_writepage_cow_fixup(struct folio *folio);
638int btrfs_encoded_io_compression_from_extent(struct btrfs_fs_info *fs_info,
639					     int compress_type);
640int btrfs_encoded_read_regular_fill_pages(struct btrfs_inode *inode,
641					  u64 disk_bytenr, u64 disk_io_size,
642					  struct page **pages, void *uring_ctx);
643ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter,
644			   struct btrfs_ioctl_encoded_io_args *encoded,
645			   struct extent_state **cached_state,
646			   u64 *disk_bytenr, u64 *disk_io_size);
647ssize_t btrfs_encoded_read_regular(struct kiocb *iocb, struct iov_iter *iter,
648				   u64 start, u64 lockend,
649				   struct extent_state **cached_state,
650				   u64 disk_bytenr, u64 disk_io_size,
651				   size_t count, bool compressed, bool *unlocked);
652ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from,
653			       const struct btrfs_ioctl_encoded_io_args *encoded);
654
655struct btrfs_inode *btrfs_find_first_inode(struct btrfs_root *root, u64 min_ino);
656
657extern const struct dentry_operations btrfs_dentry_operations;
658
659/* Inode locking type flags, by default the exclusive lock is taken. */
660enum btrfs_ilock_type {
661	ENUM_BIT(BTRFS_ILOCK_SHARED),
662	ENUM_BIT(BTRFS_ILOCK_TRY),
663	ENUM_BIT(BTRFS_ILOCK_MMAP),
664};
665
666int btrfs_inode_lock(struct btrfs_inode *inode, unsigned int ilock_flags);
667void btrfs_inode_unlock(struct btrfs_inode *inode, unsigned int ilock_flags);
668void btrfs_update_inode_bytes(struct btrfs_inode *inode, const u64 add_bytes,
669			      const u64 del_bytes);
670void btrfs_assert_inode_range_clean(struct btrfs_inode *inode, u64 start, u64 end);
671u64 btrfs_get_extent_allocation_hint(struct btrfs_inode *inode, u64 start,
672				     u64 num_bytes);
673struct extent_map *btrfs_create_io_em(struct btrfs_inode *inode, u64 start,
674				      const struct btrfs_file_extent *file_extent,
675				      int type);
676
677#endif