xref: /linux/fs/xfs/xfs_inode.h (revision 8b8eed05a1c650c27e78bc47d07f7d6c9ba779e8)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
4  * All Rights Reserved.
5  */
6 #ifndef	__XFS_INODE_H__
7 #define	__XFS_INODE_H__
8 
9 #include "xfs_inode_buf.h"
10 #include "xfs_inode_fork.h"
11 
12 /*
13  * Kernel only inode definitions
14  */
15 struct xfs_dinode;
16 struct xfs_inode;
17 struct xfs_buf;
18 struct xfs_bmbt_irec;
19 struct xfs_inode_log_item;
20 struct xfs_mount;
21 struct xfs_trans;
22 struct xfs_dquot;
23 
24 typedef struct xfs_inode {
25 	/* Inode linking and identification information. */
26 	struct xfs_mount	*i_mount;	/* fs mount struct ptr */
27 	struct xfs_dquot	*i_udquot;	/* user dquot */
28 	struct xfs_dquot	*i_gdquot;	/* group dquot */
29 	struct xfs_dquot	*i_pdquot;	/* project dquot */
30 
31 	/* Inode location stuff */
32 	xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
33 	struct xfs_imap		i_imap;		/* location for xfs_imap() */
34 
35 	/* Extent information. */
36 	struct xfs_ifork	*i_cowfp;	/* copy on write extents */
37 	struct xfs_ifork	i_df;		/* data fork */
38 	struct xfs_ifork	i_af;		/* attribute fork */
39 
40 	/* Transaction and locking information. */
41 	struct xfs_inode_log_item *i_itemp;	/* logging information */
42 	mrlock_t		i_lock;		/* inode lock */
43 	atomic_t		i_pincount;	/* inode pin count */
44 	struct llist_node	i_gclist;	/* deferred inactivation list */
45 
46 	/*
47 	 * Bitsets of inode metadata that have been checked and/or are sick.
48 	 * Callers must hold i_flags_lock before accessing this field.
49 	 */
50 	uint16_t		i_checked;
51 	uint16_t		i_sick;
52 
53 	spinlock_t		i_flags_lock;	/* inode i_flags lock */
54 	/* Miscellaneous state. */
55 	unsigned long		i_flags;	/* see defined flags below */
56 	uint64_t		i_delayed_blks;	/* count of delay alloc blks */
57 	xfs_fsize_t		i_disk_size;	/* number of bytes in file */
58 	xfs_rfsblock_t		i_nblocks;	/* # of direct & btree blocks */
59 	prid_t			i_projid;	/* owner's project id */
60 	xfs_extlen_t		i_extsize;	/* basic/minimum extent size */
61 	/* cowextsize is only used for v3 inodes, flushiter for v1/2 */
62 	union {
63 		xfs_extlen_t	i_cowextsize;	/* basic cow extent size */
64 		uint16_t	i_flushiter;	/* incremented on flush */
65 	};
66 	uint8_t			i_forkoff;	/* attr fork offset >> 3 */
67 	uint16_t		i_diflags;	/* XFS_DIFLAG_... */
68 	uint64_t		i_diflags2;	/* XFS_DIFLAG2_... */
69 	struct timespec64	i_crtime;	/* time created */
70 
71 	/*
72 	 * Unlinked list pointers.  These point to the next and previous inodes
73 	 * in the AGI unlinked bucket list, respectively.  These fields can
74 	 * only be updated with the AGI locked.
75 	 *
76 	 * i_next_unlinked caches di_next_unlinked.
77 	 */
78 	xfs_agino_t		i_next_unlinked;
79 
80 	/*
81 	 * If the inode is not on an unlinked list, this field is zero.  If the
82 	 * inode is the first element in an unlinked list, this field is
83 	 * NULLAGINO.  Otherwise, i_prev_unlinked points to the previous inode
84 	 * in the unlinked list.
85 	 */
86 	xfs_agino_t		i_prev_unlinked;
87 
88 	/* VFS inode */
89 	struct inode		i_vnode;	/* embedded VFS inode */
90 
91 	/* pending io completions */
92 	spinlock_t		i_ioend_lock;
93 	struct work_struct	i_ioend_work;
94 	struct list_head	i_ioend_list;
95 } xfs_inode_t;
96 
97 static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
98 {
99 	return ip->i_prev_unlinked != 0;
100 }
101 
102 static inline bool xfs_inode_has_attr_fork(struct xfs_inode *ip)
103 {
104 	return ip->i_forkoff > 0;
105 }
106 
107 static inline struct xfs_ifork *
108 xfs_ifork_ptr(
109 	struct xfs_inode	*ip,
110 	int			whichfork)
111 {
112 	switch (whichfork) {
113 	case XFS_DATA_FORK:
114 		return &ip->i_df;
115 	case XFS_ATTR_FORK:
116 		if (!xfs_inode_has_attr_fork(ip))
117 			return NULL;
118 		return &ip->i_af;
119 	case XFS_COW_FORK:
120 		return ip->i_cowfp;
121 	default:
122 		ASSERT(0);
123 		return NULL;
124 	}
125 }
126 
127 static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
128 {
129 	return ip->i_forkoff << 3;
130 }
131 
132 static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip)
133 {
134 	if (xfs_inode_has_attr_fork(ip))
135 		return xfs_inode_fork_boff(ip);
136 
137 	return XFS_LITINO(ip->i_mount);
138 }
139 
140 static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip)
141 {
142 	if (xfs_inode_has_attr_fork(ip))
143 		return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip);
144 	return 0;
145 }
146 
147 static inline unsigned int
148 xfs_inode_fork_size(
149 	struct xfs_inode	*ip,
150 	int			whichfork)
151 {
152 	switch (whichfork) {
153 	case XFS_DATA_FORK:
154 		return xfs_inode_data_fork_size(ip);
155 	case XFS_ATTR_FORK:
156 		return xfs_inode_attr_fork_size(ip);
157 	default:
158 		return 0;
159 	}
160 }
161 
162 /* Convert from vfs inode to xfs inode */
163 static inline struct xfs_inode *XFS_I(struct inode *inode)
164 {
165 	return container_of(inode, struct xfs_inode, i_vnode);
166 }
167 
168 /* convert from xfs inode to vfs inode */
169 static inline struct inode *VFS_I(struct xfs_inode *ip)
170 {
171 	return &ip->i_vnode;
172 }
173 
174 /*
175  * For regular files we only update the on-disk filesize when actually
176  * writing data back to disk.  Until then only the copy in the VFS inode
177  * is uptodate.
178  */
179 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
180 {
181 	if (S_ISREG(VFS_I(ip)->i_mode))
182 		return i_size_read(VFS_I(ip));
183 	return ip->i_disk_size;
184 }
185 
186 /*
187  * If this I/O goes past the on-disk inode size update it unless it would
188  * be past the current in-core inode size.
189  */
190 static inline xfs_fsize_t
191 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
192 {
193 	xfs_fsize_t i_size = i_size_read(VFS_I(ip));
194 
195 	if (new_size > i_size || new_size < 0)
196 		new_size = i_size;
197 	return new_size > ip->i_disk_size ? new_size : 0;
198 }
199 
200 /*
201  * i_flags helper functions
202  */
203 static inline void
204 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
205 {
206 	ip->i_flags |= flags;
207 }
208 
209 static inline void
210 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
211 {
212 	spin_lock(&ip->i_flags_lock);
213 	__xfs_iflags_set(ip, flags);
214 	spin_unlock(&ip->i_flags_lock);
215 }
216 
217 static inline void
218 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
219 {
220 	spin_lock(&ip->i_flags_lock);
221 	ip->i_flags &= ~flags;
222 	spin_unlock(&ip->i_flags_lock);
223 }
224 
225 static inline int
226 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
227 {
228 	return (ip->i_flags & flags);
229 }
230 
231 static inline int
232 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
233 {
234 	int ret;
235 	spin_lock(&ip->i_flags_lock);
236 	ret = __xfs_iflags_test(ip, flags);
237 	spin_unlock(&ip->i_flags_lock);
238 	return ret;
239 }
240 
241 static inline int
242 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
243 {
244 	int ret;
245 
246 	spin_lock(&ip->i_flags_lock);
247 	ret = ip->i_flags & flags;
248 	if (ret)
249 		ip->i_flags &= ~flags;
250 	spin_unlock(&ip->i_flags_lock);
251 	return ret;
252 }
253 
254 static inline int
255 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
256 {
257 	int ret;
258 
259 	spin_lock(&ip->i_flags_lock);
260 	ret = ip->i_flags & flags;
261 	if (!ret)
262 		ip->i_flags |= flags;
263 	spin_unlock(&ip->i_flags_lock);
264 	return ret;
265 }
266 
267 static inline prid_t
268 xfs_get_initial_prid(struct xfs_inode *dp)
269 {
270 	if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT)
271 		return dp->i_projid;
272 
273 	return XFS_PROJID_DEFAULT;
274 }
275 
276 static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
277 {
278 	return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
279 }
280 
281 static inline bool xfs_is_metadata_inode(struct xfs_inode *ip)
282 {
283 	struct xfs_mount	*mp = ip->i_mount;
284 
285 	return ip == mp->m_rbmip || ip == mp->m_rsumip ||
286 		xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
287 }
288 
289 /*
290  * Check if an inode has any data in the COW fork.  This might be often false
291  * even for inodes with the reflink flag when there is no pending COW operation.
292  */
293 static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
294 {
295 	return ip->i_cowfp && ip->i_cowfp->if_bytes;
296 }
297 
298 static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
299 {
300 	return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
301 }
302 
303 static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip)
304 {
305 	return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
306 }
307 
308 /*
309  * Return the buftarg used for data allocations on a given inode.
310  */
311 #define xfs_inode_buftarg(ip) \
312 	(XFS_IS_REALTIME_INODE(ip) ? \
313 		(ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
314 
315 /*
316  * In-core inode flags.
317  */
318 #define XFS_IRECLAIM		(1 << 0) /* started reclaiming this inode */
319 #define XFS_ISTALE		(1 << 1) /* inode has been staled */
320 #define XFS_IRECLAIMABLE	(1 << 2) /* inode can be reclaimed */
321 #define XFS_INEW		(1 << 3) /* inode has just been allocated */
322 #define XFS_IPRESERVE_DM_FIELDS	(1 << 4) /* has legacy DMAPI fields set */
323 #define XFS_ITRUNCATED		(1 << 5) /* truncated down so flush-on-close */
324 #define XFS_IDIRTY_RELEASE	(1 << 6) /* dirty release already seen */
325 #define XFS_IFLUSHING		(1 << 7) /* inode is being flushed */
326 #define __XFS_IPINNED_BIT	8	 /* wakeup key for zero pin count */
327 #define XFS_IPINNED		(1 << __XFS_IPINNED_BIT)
328 #define XFS_IEOFBLOCKS		(1 << 9) /* has the preallocblocks tag set */
329 #define XFS_NEED_INACTIVE	(1 << 10) /* see XFS_INACTIVATING below */
330 /*
331  * If this unlinked inode is in the middle of recovery, don't let drop_inode
332  * truncate and free the inode.  This can happen if we iget the inode during
333  * log recovery to replay a bmap operation on the inode.
334  */
335 #define XFS_IRECOVERY		(1 << 11)
336 #define XFS_ICOWBLOCKS		(1 << 12)/* has the cowblocks tag set */
337 
338 /*
339  * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
340  * freed, then NEED_INACTIVE will be set.  Once we start the updates, the
341  * INACTIVATING bit will be set to keep iget away from this inode.  After the
342  * inactivation completes, both flags will be cleared and the inode is a
343  * plain old IRECLAIMABLE inode.
344  */
345 #define XFS_INACTIVATING	(1 << 13)
346 
347 /* Quotacheck is running but inode has not been added to quota counts. */
348 #define XFS_IQUOTAUNCHECKED	(1 << 14)
349 
350 /*
351  * Remap in progress. Callers that wish to update file data while
352  * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
353  * the lock in exclusive mode. Relocking the file will block until
354  * IREMAPPING is cleared.
355  */
356 #define XFS_IREMAPPING		(1U << 15)
357 
358 /* All inode state flags related to inode reclaim. */
359 #define XFS_ALL_IRECLAIM_FLAGS	(XFS_IRECLAIMABLE | \
360 				 XFS_IRECLAIM | \
361 				 XFS_NEED_INACTIVE | \
362 				 XFS_INACTIVATING)
363 
364 /*
365  * Per-lifetime flags need to be reset when re-using a reclaimable inode during
366  * inode lookup. This prevents unintended behaviour on the new inode from
367  * ocurring.
368  */
369 #define XFS_IRECLAIM_RESET_FLAGS	\
370 	(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
371 	 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
372 	 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
373 
374 /*
375  * Flags for inode locking.
376  * Bit ranges:	1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
377  *		1<<16 - 1<<32-1 -- lockdep annotation (integers)
378  */
379 #define	XFS_IOLOCK_EXCL		(1u << 0)
380 #define	XFS_IOLOCK_SHARED	(1u << 1)
381 #define	XFS_ILOCK_EXCL		(1u << 2)
382 #define	XFS_ILOCK_SHARED	(1u << 3)
383 #define	XFS_MMAPLOCK_EXCL	(1u << 4)
384 #define	XFS_MMAPLOCK_SHARED	(1u << 5)
385 
386 #define XFS_LOCK_MASK		(XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
387 				| XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
388 				| XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
389 
390 #define XFS_LOCK_FLAGS \
391 	{ XFS_IOLOCK_EXCL,	"IOLOCK_EXCL" }, \
392 	{ XFS_IOLOCK_SHARED,	"IOLOCK_SHARED" }, \
393 	{ XFS_ILOCK_EXCL,	"ILOCK_EXCL" }, \
394 	{ XFS_ILOCK_SHARED,	"ILOCK_SHARED" }, \
395 	{ XFS_MMAPLOCK_EXCL,	"MMAPLOCK_EXCL" }, \
396 	{ XFS_MMAPLOCK_SHARED,	"MMAPLOCK_SHARED" }
397 
398 
399 /*
400  * Flags for lockdep annotations.
401  *
402  * XFS_LOCK_PARENT - for directory operations that require locking a
403  * parent directory inode and a child entry inode. IOLOCK requires nesting,
404  * MMAPLOCK does not support this class, ILOCK requires a single subclass
405  * to differentiate parent from child.
406  *
407  * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
408  * inodes do not participate in the normal lock order, and thus have their
409  * own subclasses.
410  *
411  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
412  * with xfs_lock_inodes().  This flag is used as the starting subclass
413  * and each subsequent lock acquired will increment the subclass by one.
414  * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
415  * limited to the subclasses we can represent via nesting. We need at least
416  * 5 inodes nest depth for the ILOCK through rename, and we also have to support
417  * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
418  * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
419  * 8 subclasses supported by lockdep.
420  *
421  * This also means we have to number the sub-classes in the lowest bits of
422  * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
423  * mask and we can't use bit-masking to build the subclasses. What a mess.
424  *
425  * Bit layout:
426  *
427  * Bit		Lock Region
428  * 16-19	XFS_IOLOCK_SHIFT dependencies
429  * 20-23	XFS_MMAPLOCK_SHIFT dependencies
430  * 24-31	XFS_ILOCK_SHIFT dependencies
431  *
432  * IOLOCK values
433  *
434  * 0-3		subclass value
435  * 4-7		unused
436  *
437  * MMAPLOCK values
438  *
439  * 0-3		subclass value
440  * 4-7		unused
441  *
442  * ILOCK values
443  * 0-4		subclass values
444  * 5		PARENT subclass (not nestable)
445  * 6		RTBITMAP subclass (not nestable)
446  * 7		RTSUM subclass (not nestable)
447  *
448  */
449 #define XFS_IOLOCK_SHIFT		16
450 #define XFS_IOLOCK_MAX_SUBCLASS		3
451 #define XFS_IOLOCK_DEP_MASK		0x000f0000u
452 
453 #define XFS_MMAPLOCK_SHIFT		20
454 #define XFS_MMAPLOCK_NUMORDER		0
455 #define XFS_MMAPLOCK_MAX_SUBCLASS	3
456 #define XFS_MMAPLOCK_DEP_MASK		0x00f00000u
457 
458 #define XFS_ILOCK_SHIFT			24
459 #define XFS_ILOCK_PARENT_VAL		5u
460 #define XFS_ILOCK_MAX_SUBCLASS		(XFS_ILOCK_PARENT_VAL - 1)
461 #define XFS_ILOCK_RTBITMAP_VAL		6u
462 #define XFS_ILOCK_RTSUM_VAL		7u
463 #define XFS_ILOCK_DEP_MASK		0xff000000u
464 #define	XFS_ILOCK_PARENT		(XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
465 #define	XFS_ILOCK_RTBITMAP		(XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
466 #define	XFS_ILOCK_RTSUM			(XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
467 
468 #define XFS_LOCK_SUBCLASS_MASK	(XFS_IOLOCK_DEP_MASK | \
469 				 XFS_MMAPLOCK_DEP_MASK | \
470 				 XFS_ILOCK_DEP_MASK)
471 
472 #define XFS_IOLOCK_DEP(flags)	(((flags) & XFS_IOLOCK_DEP_MASK) \
473 					>> XFS_IOLOCK_SHIFT)
474 #define XFS_MMAPLOCK_DEP(flags)	(((flags) & XFS_MMAPLOCK_DEP_MASK) \
475 					>> XFS_MMAPLOCK_SHIFT)
476 #define XFS_ILOCK_DEP(flags)	(((flags) & XFS_ILOCK_DEP_MASK) \
477 					>> XFS_ILOCK_SHIFT)
478 
479 /*
480  * Layouts are broken in the BREAK_WRITE case to ensure that
481  * layout-holders do not collide with local writes. Additionally,
482  * layouts are broken in the BREAK_UNMAP case to make sure the
483  * layout-holder has a consistent view of the file's extent map. While
484  * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
485  * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
486  * go idle.
487  */
488 enum layout_break_reason {
489         BREAK_WRITE,
490         BREAK_UNMAP,
491 };
492 
493 /*
494  * For multiple groups support: if S_ISGID bit is set in the parent
495  * directory, group of new file is set to that of the parent, and
496  * new subdirectory gets S_ISGID bit from parent.
497  */
498 #define XFS_INHERIT_GID(pip)	\
499 	(xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
500 
501 int		xfs_release(struct xfs_inode *ip);
502 int		xfs_inactive(struct xfs_inode *ip);
503 int		xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
504 			   struct xfs_inode **ipp, struct xfs_name *ci_name);
505 int		xfs_create(struct mnt_idmap *idmap,
506 			   struct xfs_inode *dp, struct xfs_name *name,
507 			   umode_t mode, dev_t rdev, bool need_xattr,
508 			   struct xfs_inode **ipp);
509 int		xfs_create_tmpfile(struct mnt_idmap *idmap,
510 			   struct xfs_inode *dp, umode_t mode,
511 			   struct xfs_inode **ipp);
512 int		xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
513 			   struct xfs_inode *ip);
514 int		xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
515 			 struct xfs_name *target_name);
516 int		xfs_rename(struct mnt_idmap *idmap,
517 			   struct xfs_inode *src_dp, struct xfs_name *src_name,
518 			   struct xfs_inode *src_ip, struct xfs_inode *target_dp,
519 			   struct xfs_name *target_name,
520 			   struct xfs_inode *target_ip, unsigned int flags);
521 
522 void		xfs_ilock(xfs_inode_t *, uint);
523 int		xfs_ilock_nowait(xfs_inode_t *, uint);
524 void		xfs_iunlock(xfs_inode_t *, uint);
525 void		xfs_ilock_demote(xfs_inode_t *, uint);
526 bool		xfs_isilocked(struct xfs_inode *, uint);
527 uint		xfs_ilock_data_map_shared(struct xfs_inode *);
528 uint		xfs_ilock_attr_map_shared(struct xfs_inode *);
529 
530 uint		xfs_ip2xflags(struct xfs_inode *);
531 int		xfs_ifree(struct xfs_trans *, struct xfs_inode *);
532 int		xfs_itruncate_extents_flags(struct xfs_trans **,
533 				struct xfs_inode *, int, xfs_fsize_t, int);
534 void		xfs_iext_realloc(xfs_inode_t *, int, int);
535 
536 int		xfs_log_force_inode(struct xfs_inode *ip);
537 void		xfs_iunpin_wait(xfs_inode_t *);
538 #define xfs_ipincount(ip)	((unsigned int) atomic_read(&ip->i_pincount))
539 
540 int		xfs_iflush_cluster(struct xfs_buf *);
541 void		xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
542 				struct xfs_inode *ip1, uint ip1_mode);
543 
544 xfs_extlen_t	xfs_get_extsz_hint(struct xfs_inode *ip);
545 xfs_extlen_t	xfs_get_cowextsz_hint(struct xfs_inode *ip);
546 
547 int xfs_init_new_inode(struct mnt_idmap *idmap, struct xfs_trans *tp,
548 		struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
549 		xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
550 		struct xfs_inode **ipp);
551 
552 static inline int
553 xfs_itruncate_extents(
554 	struct xfs_trans	**tpp,
555 	struct xfs_inode	*ip,
556 	int			whichfork,
557 	xfs_fsize_t		new_size)
558 {
559 	return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
560 }
561 
562 /* from xfs_file.c */
563 int	xfs_break_dax_layouts(struct inode *inode, bool *retry);
564 int	xfs_break_layouts(struct inode *inode, uint *iolock,
565 		enum layout_break_reason reason);
566 
567 /* from xfs_iops.c */
568 extern void xfs_setup_inode(struct xfs_inode *ip);
569 extern void xfs_setup_iops(struct xfs_inode *ip);
570 extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
571 
572 /*
573  * When setting up a newly allocated inode, we need to call
574  * xfs_finish_inode_setup() once the inode is fully instantiated at
575  * the VFS level to prevent the rest of the world seeing the inode
576  * before we've completed instantiation. Otherwise we can do it
577  * the moment the inode lookup is complete.
578  */
579 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
580 {
581 	xfs_iflags_clear(ip, XFS_INEW);
582 	barrier();
583 	unlock_new_inode(VFS_I(ip));
584 }
585 
586 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
587 {
588 	xfs_setup_inode(ip);
589 	xfs_setup_iops(ip);
590 	xfs_finish_inode_setup(ip);
591 }
592 
593 void xfs_irele(struct xfs_inode *ip);
594 
595 extern struct kmem_cache	*xfs_inode_cache;
596 
597 /* The default CoW extent size hint. */
598 #define XFS_DEFAULT_COWEXTSZ_HINT 32
599 
600 bool xfs_inode_needs_inactive(struct xfs_inode *ip);
601 
602 void xfs_end_io(struct work_struct *work);
603 
604 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
605 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
606 void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
607 
608 static inline bool
609 xfs_inode_unlinked_incomplete(
610 	struct xfs_inode	*ip)
611 {
612 	return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
613 }
614 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
615 int xfs_inode_reload_unlinked(struct xfs_inode *ip);
616 
617 #endif	/* __XFS_INODE_H__ */
618