xfs_inode.h

  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#include "xfs_inode_util.h"
 12
 13/*
 14 * Kernel only inode definitions
 15 */
 16struct xfs_dinode;
 17struct xfs_inode;
 18struct xfs_buf;
 19struct xfs_bmbt_irec;
 20struct xfs_inode_log_item;
 21struct xfs_mount;
 22struct xfs_trans;
 23struct xfs_dquot;
 24
 25typedef struct xfs_inode {
 26	/* Inode linking and identification information. */
 27	struct xfs_mount	*i_mount;	/* fs mount struct ptr */
 28	struct xfs_dquot	*i_udquot;	/* user dquot */
 29	struct xfs_dquot	*i_gdquot;	/* group dquot */
 30	struct xfs_dquot	*i_pdquot;	/* project dquot */
 31
 32	/* Inode location stuff */
 33	xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
 34	struct xfs_imap		i_imap;		/* location for xfs_imap() */
 35
 36	/* Extent information. */
 37	struct xfs_ifork	*i_cowfp;	/* copy on write extents */
 38	struct xfs_ifork	i_df;		/* data fork */
 39	struct xfs_ifork	i_af;		/* attribute fork */
 40
 41	/* Transaction and locking information. */
 42	struct xfs_inode_log_item *i_itemp;	/* logging information */
 43	struct rw_semaphore	i_lock;		/* inode lock */
 44	atomic_t		i_pincount;	/* inode pin count */
 45	struct llist_node	i_gclist;	/* deferred inactivation list */
 46
 47	/*
 48	 * Bitsets of inode metadata that have been checked and/or are sick.
 49	 * Callers must hold i_flags_lock before accessing this field.
 50	 */
 51	uint16_t		i_checked;
 52	uint16_t		i_sick;
 53
 54	spinlock_t		i_flags_lock;	/* inode i_flags lock */
 55	/* Miscellaneous state. */
 56	unsigned long		i_flags;	/* see defined flags below */
 57	uint64_t		i_delayed_blks;	/* count of delay alloc blks */
 58	xfs_fsize_t		i_disk_size;	/* number of bytes in file */
 59	xfs_rfsblock_t		i_nblocks;	/* # of direct & btree blocks */
 60	prid_t			i_projid;	/* owner's project id */
 61	xfs_extlen_t		i_extsize;	/* basic/minimum extent size */
 62	/*
 63	 * i_used_blocks is used for zoned rtrmap inodes,
 64	 * i_cowextsize is used for other v3 inodes,
 65	 * i_flushiter for v1/2 inodes
 66	 */
 67	union {
 68		uint32_t	i_used_blocks;	/* used blocks in RTG */
 69		xfs_extlen_t	i_cowextsize;	/* basic cow extent size */
 70		uint16_t	i_flushiter;	/* incremented on flush */
 71	};
 72	uint8_t			i_forkoff;	/* attr fork offset >> 3 */
 73	enum xfs_metafile_type	i_metatype;	/* XFS_METAFILE_* */
 74	uint16_t		i_diflags;	/* XFS_DIFLAG_... */
 75	uint64_t		i_diflags2;	/* XFS_DIFLAG2_... */
 76	struct timespec64	i_crtime;	/* time created */
 77
 78	/*
 79	 * Unlinked list pointers.  These point to the next and previous inodes
 80	 * in the AGI unlinked bucket list, respectively.  These fields can
 81	 * only be updated with the AGI locked.
 82	 *
 83	 * i_next_unlinked caches di_next_unlinked.
 84	 */
 85	xfs_agino_t		i_next_unlinked;
 86
 87	/*
 88	 * If the inode is not on an unlinked list, this field is zero.  If the
 89	 * inode is the first element in an unlinked list, this field is
 90	 * NULLAGINO.  Otherwise, i_prev_unlinked points to the previous inode
 91	 * in the unlinked list.
 92	 */
 93	xfs_agino_t		i_prev_unlinked;
 94
 95	/* VFS inode */
 96	struct inode		i_vnode;	/* embedded VFS inode */
 97
 98	/* pending io completions */
 99	spinlock_t		i_ioend_lock;
100	struct work_struct	i_ioend_work;
101	struct list_head	i_ioend_list;
102} xfs_inode_t;
103
104static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
105{
106	return ip->i_prev_unlinked != 0;
107}
108
109static inline bool xfs_inode_has_attr_fork(const struct xfs_inode *ip)
110{
111	return ip->i_forkoff > 0;
112}
113
114static inline struct xfs_ifork *
115xfs_ifork_ptr(
116	struct xfs_inode	*ip,
117	int			whichfork)
118{
119	switch (whichfork) {
120	case XFS_DATA_FORK:
121		return &ip->i_df;
122	case XFS_ATTR_FORK:
123		if (!xfs_inode_has_attr_fork(ip))
124			return NULL;
125		return &ip->i_af;
126	case XFS_COW_FORK:
127		return ip->i_cowfp;
128	default:
129		ASSERT(0);
130		return NULL;
131	}
132}
133
134static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
135{
136	return ip->i_forkoff << 3;
137}
138
139static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip)
140{
141	if (xfs_inode_has_attr_fork(ip))
142		return xfs_inode_fork_boff(ip);
143
144	return XFS_LITINO(ip->i_mount);
145}
146
147static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip)
148{
149	if (xfs_inode_has_attr_fork(ip))
150		return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip);
151	return 0;
152}
153
154static inline unsigned int
155xfs_inode_fork_size(
156	struct xfs_inode	*ip,
157	int			whichfork)
158{
159	switch (whichfork) {
160	case XFS_DATA_FORK:
161		return xfs_inode_data_fork_size(ip);
162	case XFS_ATTR_FORK:
163		return xfs_inode_attr_fork_size(ip);
164	default:
165		return 0;
166	}
167}
168
169/* Convert from vfs inode to xfs inode */
170static inline struct xfs_inode *XFS_I(struct inode *inode)
171{
172	return container_of(inode, struct xfs_inode, i_vnode);
173}
174
175/* convert from xfs inode to vfs inode */
176static inline struct inode *VFS_I(struct xfs_inode *ip)
177{
178	return &ip->i_vnode;
179}
180
181/* convert from const xfs inode to const vfs inode */
182static inline const struct inode *VFS_IC(const struct xfs_inode *ip)
183{
184	return &ip->i_vnode;
185}
186
187/*
188 * For regular files we only update the on-disk filesize when actually
189 * writing data back to disk.  Until then only the copy in the VFS inode
190 * is uptodate.
191 */
192static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
193{
194	if (S_ISREG(VFS_I(ip)->i_mode))
195		return i_size_read(VFS_I(ip));
196	return ip->i_disk_size;
197}
198
199/*
200 * If this I/O goes past the on-disk inode size update it unless it would
201 * be past the current in-core inode size.
202 */
203static inline xfs_fsize_t
204xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
205{
206	xfs_fsize_t i_size = i_size_read(VFS_I(ip));
207
208	if (new_size > i_size || new_size < 0)
209		new_size = i_size;
210	return new_size > ip->i_disk_size ? new_size : 0;
211}
212
213/*
214 * i_flags helper functions
215 */
216static inline void
217__xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
218{
219	ip->i_flags |= flags;
220}
221
222static inline void
223xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
224{
225	spin_lock(&ip->i_flags_lock);
226	__xfs_iflags_set(ip, flags);
227	spin_unlock(&ip->i_flags_lock);
228}
229
230static inline void
231xfs_iflags_clear(xfs_inode_t *ip, unsigned long flags)
232{
233	spin_lock(&ip->i_flags_lock);
234	ip->i_flags &= ~flags;
235	spin_unlock(&ip->i_flags_lock);
236}
237
238static inline int
239__xfs_iflags_test(const struct xfs_inode *ip, unsigned long flags)
240{
241	return (ip->i_flags & flags);
242}
243
244static inline int
245xfs_iflags_test(xfs_inode_t *ip, unsigned long flags)
246{
247	int ret;
248	spin_lock(&ip->i_flags_lock);
249	ret = __xfs_iflags_test(ip, flags);
250	spin_unlock(&ip->i_flags_lock);
251	return ret;
252}
253
254static inline int
255xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned long 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
267static inline int
268xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned long flags)
269{
270	int ret;
271
272	spin_lock(&ip->i_flags_lock);
273	ret = ip->i_flags & flags;
274	if (!ret)
275		ip->i_flags |= flags;
276	spin_unlock(&ip->i_flags_lock);
277	return ret;
278}
279
280static inline bool xfs_is_reflink_inode(const struct xfs_inode *ip)
281{
282	return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
283}
284
285static inline bool xfs_is_metadir_inode(const struct xfs_inode *ip)
286{
287	return ip->i_diflags2 & XFS_DIFLAG2_METADATA;
288}
289
290static inline bool xfs_is_internal_inode(const struct xfs_inode *ip)
291{
292	struct xfs_mount	*mp = ip->i_mount;
293
294	/* Any file in the metadata directory tree is a metadata inode. */
295	if (xfs_has_metadir(mp))
296		return xfs_is_metadir_inode(ip);
297
298	/*
299	 * Before metadata directories, the only metadata inodes were the
300	 * three quota files, the realtime bitmap, and the realtime summary.
301	 */
302	return ip->i_ino == mp->m_sb.sb_rbmino ||
303	       ip->i_ino == mp->m_sb.sb_rsumino ||
304	       xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
305}
306
307static inline bool xfs_is_zoned_inode(const struct xfs_inode *ip)
308{
309	return xfs_has_zoned(ip->i_mount) && XFS_IS_REALTIME_INODE(ip);
310}
311
312bool xfs_is_always_cow_inode(const struct xfs_inode *ip);
313
314static inline bool xfs_is_cow_inode(const struct xfs_inode *ip)
315{
316	return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
317}
318
319static inline bool xfs_inode_has_filedata(const struct xfs_inode *ip)
320{
321	return ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0;
322}
323
324/*
325 * Check if an inode has any data in the COW fork.  This might be often false
326 * even for inodes with the reflink flag when there is no pending COW operation.
327 */
328static inline bool xfs_inode_has_cow_data(const struct xfs_inode *ip)
329{
330	return ip->i_cowfp && ip->i_cowfp->if_bytes;
331}
332
333static inline bool xfs_inode_has_bigtime(const struct xfs_inode *ip)
334{
335	return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
336}
337
338static inline bool xfs_inode_has_large_extent_counts(const struct xfs_inode *ip)
339{
340	return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
341}
342
343/*
344 * Decide if this file is a realtime file whose data allocation unit is larger
345 * than a single filesystem block.
346 */
347static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
348{
349	return XFS_IS_REALTIME_INODE(ip) && ip->i_mount->m_sb.sb_rextsize > 1;
350}
351
352/*
353 * Return the buftarg used for data allocations on a given inode.
354 */
355#define xfs_inode_buftarg(ip) \
356	(XFS_IS_REALTIME_INODE(ip) ? \
357		(ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
358
359static inline bool xfs_inode_can_hw_atomic_write(const struct xfs_inode *ip)
360{
361	if (IS_DAX(VFS_IC(ip)))
362		return false;
363
364	return xfs_inode_buftarg(ip)->bt_awu_max > 0;
365}
366
367static inline bool xfs_inode_can_sw_atomic_write(const struct xfs_inode *ip)
368{
369	if (IS_DAX(VFS_IC(ip)))
370		return false;
371
372	return xfs_can_sw_atomic_write(ip->i_mount);
373}
374
375/*
376 * In-core inode flags.
377 */
378#define XFS_IRECLAIM		(1 << 0) /* started reclaiming this inode */
379#define XFS_ISTALE		(1 << 1) /* inode has been staled */
380#define XFS_IRECLAIMABLE	(1 << 2) /* inode can be reclaimed */
381#define XFS_INEW		(1 << 3) /* inode has just been allocated */
382#define XFS_IPRESERVE_DM_FIELDS	(1 << 4) /* has legacy DMAPI fields set */
383#define XFS_ITRUNCATED		(1 << 5) /* truncated down so flush-on-close */
384#define XFS_EOFBLOCKS_RELEASED	(1 << 6) /* eofblocks were freed in ->release */
385#define XFS_IFLUSHING		(1 << 7) /* inode is being flushed */
386#define __XFS_IPINNED_BIT	8	 /* wakeup key for zero pin count */
387#define XFS_IPINNED		(1 << __XFS_IPINNED_BIT)
388#define XFS_IEOFBLOCKS		(1 << 9) /* has the preallocblocks tag set */
389#define XFS_NEED_INACTIVE	(1 << 10) /* see XFS_INACTIVATING below */
390/*
391 * If this unlinked inode is in the middle of recovery, don't let drop_inode
392 * truncate and free the inode.  This can happen if we iget the inode during
393 * log recovery to replay a bmap operation on the inode.
394 */
395#define XFS_IRECOVERY		(1 << 11)
396#define XFS_ICOWBLOCKS		(1 << 12)/* has the cowblocks tag set */
397
398/*
399 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
400 * freed, then NEED_INACTIVE will be set.  Once we start the updates, the
401 * INACTIVATING bit will be set to keep iget away from this inode.  After the
402 * inactivation completes, both flags will be cleared and the inode is a
403 * plain old IRECLAIMABLE inode.
404 */
405#define XFS_INACTIVATING	(1 << 13)
406
407/* Quotacheck is running but inode has not been added to quota counts. */
408#define XFS_IQUOTAUNCHECKED	(1 << 14)
409
410/*
411 * Remap in progress. Callers that wish to update file data while
412 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
413 * the lock in exclusive mode. Relocking the file will block until
414 * IREMAPPING is cleared.
415 */
416#define XFS_IREMAPPING		(1U << 15)
417
418/* All inode state flags related to inode reclaim. */
419#define XFS_ALL_IRECLAIM_FLAGS	(XFS_IRECLAIMABLE | \
420				 XFS_IRECLAIM | \
421				 XFS_NEED_INACTIVE | \
422				 XFS_INACTIVATING)
423
424/*
425 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
426 * inode lookup. This prevents unintended behaviour on the new inode from
427 * ocurring.
428 */
429#define XFS_IRECLAIM_RESET_FLAGS	\
430	(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
431	 XFS_EOFBLOCKS_RELEASED | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
432	 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
433
434/*
435 * Flags for inode locking.
436 * Bit ranges:	1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
437 *		1<<16 - 1<<32-1 -- lockdep annotation (integers)
438 */
439#define	XFS_IOLOCK_EXCL		(1u << 0)
440#define	XFS_IOLOCK_SHARED	(1u << 1)
441#define	XFS_ILOCK_EXCL		(1u << 2)
442#define	XFS_ILOCK_SHARED	(1u << 3)
443#define	XFS_MMAPLOCK_EXCL	(1u << 4)
444#define	XFS_MMAPLOCK_SHARED	(1u << 5)
445
446#define XFS_LOCK_MASK		(XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
447				| XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
448				| XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
449
450#define XFS_LOCK_FLAGS \
451	{ XFS_IOLOCK_EXCL,	"IOLOCK_EXCL" }, \
452	{ XFS_IOLOCK_SHARED,	"IOLOCK_SHARED" }, \
453	{ XFS_ILOCK_EXCL,	"ILOCK_EXCL" }, \
454	{ XFS_ILOCK_SHARED,	"ILOCK_SHARED" }, \
455	{ XFS_MMAPLOCK_EXCL,	"MMAPLOCK_EXCL" }, \
456	{ XFS_MMAPLOCK_SHARED,	"MMAPLOCK_SHARED" }
457
458
459/*
460 * Flags for lockdep annotations.
461 *
462 * XFS_LOCK_PARENT - for directory operations that require locking a
463 * parent directory inode and a child entry inode. IOLOCK requires nesting,
464 * MMAPLOCK does not support this class, ILOCK requires a single subclass
465 * to differentiate parent from child.
466 *
467 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
468 * inodes do not participate in the normal lock order, and thus have their
469 * own subclasses.
470 *
471 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
472 * with xfs_lock_inodes().  This flag is used as the starting subclass
473 * and each subsequent lock acquired will increment the subclass by one.
474 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
475 * limited to the subclasses we can represent via nesting. We need at least
476 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
477 * XFS_ILOCK_PARENT, which gives 6 subclasses.  That's 6 of the 8 subclasses
478 * supported by lockdep.
479 *
480 * This also means we have to number the sub-classes in the lowest bits of
481 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
482 * mask and we can't use bit-masking to build the subclasses. What a mess.
483 *
484 * Bit layout:
485 *
486 * Bit		Lock Region
487 * 16-19	XFS_IOLOCK_SHIFT dependencies
488 * 20-23	XFS_MMAPLOCK_SHIFT dependencies
489 * 24-31	XFS_ILOCK_SHIFT dependencies
490 *
491 * IOLOCK values
492 *
493 * 0-3		subclass value
494 * 4-7		unused
495 *
496 * MMAPLOCK values
497 *
498 * 0-3		subclass value
499 * 4-7		unused
500 *
501 * ILOCK values
502 * 0-4		subclass values
503 * 5		PARENT subclass (not nestable)
504 * 6		unused
505 * 7		unused
506 * 
507 */
508#define XFS_IOLOCK_SHIFT		16
509#define XFS_IOLOCK_MAX_SUBCLASS		3
510#define XFS_IOLOCK_DEP_MASK		0x000f0000u
511
512#define XFS_MMAPLOCK_SHIFT		20
513#define XFS_MMAPLOCK_NUMORDER		0
514#define XFS_MMAPLOCK_MAX_SUBCLASS	3
515#define XFS_MMAPLOCK_DEP_MASK		0x00f00000u
516
517#define XFS_ILOCK_SHIFT			24
518#define XFS_ILOCK_PARENT_VAL		5u
519#define XFS_ILOCK_MAX_SUBCLASS		(XFS_ILOCK_PARENT_VAL - 1)
520#define XFS_ILOCK_DEP_MASK		0xff000000u
521#define	XFS_ILOCK_PARENT		(XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
522
523#define XFS_LOCK_SUBCLASS_MASK	(XFS_IOLOCK_DEP_MASK | \
524				 XFS_MMAPLOCK_DEP_MASK | \
525				 XFS_ILOCK_DEP_MASK)
526
527#define XFS_IOLOCK_DEP(flags)	(((flags) & XFS_IOLOCK_DEP_MASK) \
528					>> XFS_IOLOCK_SHIFT)
529#define XFS_MMAPLOCK_DEP(flags)	(((flags) & XFS_MMAPLOCK_DEP_MASK) \
530					>> XFS_MMAPLOCK_SHIFT)
531#define XFS_ILOCK_DEP(flags)	(((flags) & XFS_ILOCK_DEP_MASK) \
532					>> XFS_ILOCK_SHIFT)
533
534/*
535 * Layouts are broken in the BREAK_WRITE case to ensure that
536 * layout-holders do not collide with local writes. Additionally,
537 * layouts are broken in the BREAK_UNMAP case to make sure the
538 * layout-holder has a consistent view of the file's extent map. While
539 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
540 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
541 * go idle.
542 */
543enum layout_break_reason {
544        BREAK_WRITE,
545        BREAK_UNMAP,
546};
547
548/*
549 * For multiple groups support: if S_ISGID bit is set in the parent
550 * directory, group of new file is set to that of the parent, and
551 * new subdirectory gets S_ISGID bit from parent.
552 */
553#define XFS_INHERIT_GID(pip)	\
554	(xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
555
556int		xfs_inactive(struct xfs_inode *ip);
557int		xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
558			   struct xfs_inode **ipp, struct xfs_name *ci_name);
559int		xfs_create(const struct xfs_icreate_args *iargs,
560			   struct xfs_name *name, struct xfs_inode **ipp);
561int		xfs_create_tmpfile(const struct xfs_icreate_args *iargs,
562			   struct xfs_inode **ipp);
563int		xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
564			   struct xfs_inode *ip);
565int		xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
566			 struct xfs_name *target_name);
567int		xfs_rename(struct mnt_idmap *idmap,
568			   struct xfs_inode *src_dp, struct xfs_name *src_name,
569			   struct xfs_inode *src_ip, struct xfs_inode *target_dp,
570			   struct xfs_name *target_name,
571			   struct xfs_inode *target_ip, unsigned int flags);
572
573void		xfs_ilock(xfs_inode_t *, uint);
574int		xfs_ilock_nowait(xfs_inode_t *, uint);
575void		xfs_iunlock(xfs_inode_t *, uint);
576void		xfs_ilock_demote(xfs_inode_t *, uint);
577void		xfs_assert_ilocked(struct xfs_inode *, uint);
578uint		xfs_ilock_data_map_shared(struct xfs_inode *);
579uint		xfs_ilock_attr_map_shared(struct xfs_inode *);
580
581int		xfs_ifree(struct xfs_trans *, struct xfs_inode *);
582int		xfs_itruncate_extents_flags(struct xfs_trans **,
583				struct xfs_inode *, int, xfs_fsize_t, int);
584void		xfs_iext_realloc(xfs_inode_t *, int, int);
585
586int		xfs_log_force_inode(struct xfs_inode *ip);
587void		xfs_iunpin_wait(xfs_inode_t *);
588#define xfs_ipincount(ip)	((unsigned int) atomic_read(&ip->i_pincount))
589
590int		xfs_iflush_cluster(struct xfs_buf *);
591void		xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
592				struct xfs_inode *ip1, uint ip1_mode);
593
594int xfs_icreate(struct xfs_trans *tp, xfs_ino_t ino,
595		const struct xfs_icreate_args *args, struct xfs_inode **ipp);
596
597static inline int
598xfs_itruncate_extents(
599	struct xfs_trans	**tpp,
600	struct xfs_inode	*ip,
601	int			whichfork,
602	xfs_fsize_t		new_size)
603{
604	return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
605}
606
607int	xfs_break_dax_layouts(struct inode *inode);
608int	xfs_break_layouts(struct inode *inode, uint *iolock,
609		enum layout_break_reason reason);
610
611static inline void xfs_update_stable_writes(struct xfs_inode *ip)
612{
613	if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
614		mapping_set_stable_writes(VFS_I(ip)->i_mapping);
615	else
616		mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
617}
618
619/*
620 * When setting up a newly allocated inode, we need to call
621 * xfs_finish_inode_setup() once the inode is fully instantiated at
622 * the VFS level to prevent the rest of the world seeing the inode
623 * before we've completed instantiation. Otherwise we can do it
624 * the moment the inode lookup is complete.
625 */
626static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
627{
628	xfs_iflags_clear(ip, XFS_INEW);
629	barrier();
630	unlock_new_inode(VFS_I(ip));
631}
632
633static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
634{
635	xfs_setup_inode(ip);
636	xfs_setup_iops(ip);
637	xfs_finish_inode_setup(ip);
638}
639
640void xfs_irele(struct xfs_inode *ip);
641
642extern struct kmem_cache	*xfs_inode_cache;
643
644/* The default CoW extent size hint. */
645#define XFS_DEFAULT_COWEXTSZ_HINT 32
646
647bool xfs_inode_needs_inactive(struct xfs_inode *ip);
648
649struct xfs_inode *xfs_iunlink_lookup(struct xfs_perag *pag, xfs_agino_t agino);
650int xfs_iunlink_reload_next(struct xfs_trans *tp, struct xfs_buf *agibp,
651		xfs_agino_t prev_agino, xfs_agino_t next_agino);
652
653void xfs_end_io(struct work_struct *work);
654
655int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
656void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
657void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
658void xfs_lock_inodes(struct xfs_inode **ips, int inodes, uint lock_mode);
659void xfs_sort_inodes(struct xfs_inode **i_tab, unsigned int num_inodes);
660
661static inline bool
662xfs_inode_unlinked_incomplete(
663	const struct xfs_inode	*ip)
664{
665	return VFS_IC(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
666}
667int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
668int xfs_inode_reload_unlinked(struct xfs_inode *ip);
669
670bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork);
671void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
672		xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
673unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);
674
675int xfs_icreate_dqalloc(const struct xfs_icreate_args *args,
676		struct xfs_dquot **udqpp, struct xfs_dquot **gdqpp,
677		struct xfs_dquot **pdqpp);
678
679#endif	/* __XFS_INODE_H__ */