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v4.17
 
  1/*
  2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
  3 * All Rights Reserved.
  4 *
  5 * This program is free software; you can redistribute it and/or
  6 * modify it under the terms of the GNU General Public License as
  7 * published by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it would be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write the Free Software Foundation,
 16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17 */
 18#ifndef	__XFS_INODE_H__
 19#define	__XFS_INODE_H__
 20
 21#include "xfs_inode_buf.h"
 22#include "xfs_inode_fork.h"
 
 23
 24/*
 25 * Kernel only inode definitions
 26 */
 27struct xfs_dinode;
 28struct xfs_inode;
 29struct xfs_buf;
 30struct xfs_defer_ops;
 31struct xfs_bmbt_irec;
 32struct xfs_inode_log_item;
 33struct xfs_mount;
 34struct xfs_trans;
 35struct xfs_dquot;
 36
 37typedef struct xfs_inode {
 38	/* Inode linking and identification information. */
 39	struct xfs_mount	*i_mount;	/* fs mount struct ptr */
 40	struct xfs_dquot	*i_udquot;	/* user dquot */
 41	struct xfs_dquot	*i_gdquot;	/* group dquot */
 42	struct xfs_dquot	*i_pdquot;	/* project dquot */
 43
 44	/* Inode location stuff */
 45	xfs_ino_t		i_ino;		/* inode number (agno/agino)*/
 46	struct xfs_imap		i_imap;		/* location for xfs_imap() */
 47
 48	/* Extent information. */
 49	xfs_ifork_t		*i_afp;		/* attribute fork pointer */
 50	xfs_ifork_t		*i_cowfp;	/* copy on write extents */
 51	xfs_ifork_t		i_df;		/* data fork */
 52
 53	/* operations vectors */
 54	const struct xfs_dir_ops *d_ops;		/* directory ops vector */
 55
 56	/* Transaction and locking information. */
 57	struct xfs_inode_log_item *i_itemp;	/* logging information */
 58	mrlock_t		i_lock;		/* inode lock */
 59	mrlock_t		i_mmaplock;	/* inode mmap IO lock */
 60	atomic_t		i_pincount;	/* inode pin count */
 
 
 
 
 
 
 
 
 
 61	spinlock_t		i_flags_lock;	/* inode i_flags lock */
 62	/* Miscellaneous state. */
 63	unsigned long		i_flags;	/* see defined flags below */
 64	unsigned int		i_delayed_blks;	/* count of delay alloc blks */
 65
 66	struct xfs_icdinode	i_d;		/* most of ondisk inode */
 67
 68	xfs_extnum_t		i_cnextents;	/* # of extents in cow fork */
 69	unsigned int		i_cformat;	/* format of cow fork */
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 70
 71	/* VFS inode */
 72	struct inode		i_vnode;	/* embedded VFS inode */
 
 
 
 
 
 73} xfs_inode_t;
 74
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 75/* Convert from vfs inode to xfs inode */
 76static inline struct xfs_inode *XFS_I(struct inode *inode)
 77{
 78	return container_of(inode, struct xfs_inode, i_vnode);
 79}
 80
 81/* convert from xfs inode to vfs inode */
 82static inline struct inode *VFS_I(struct xfs_inode *ip)
 83{
 84	return &ip->i_vnode;
 85}
 86
 
 
 
 
 
 
 87/*
 88 * For regular files we only update the on-disk filesize when actually
 89 * writing data back to disk.  Until then only the copy in the VFS inode
 90 * is uptodate.
 91 */
 92static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
 93{
 94	if (S_ISREG(VFS_I(ip)->i_mode))
 95		return i_size_read(VFS_I(ip));
 96	return ip->i_d.di_size;
 97}
 98
 99/*
100 * If this I/O goes past the on-disk inode size update it unless it would
101 * be past the current in-core inode size.
102 */
103static inline xfs_fsize_t
104xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
105{
106	xfs_fsize_t i_size = i_size_read(VFS_I(ip));
107
108	if (new_size > i_size || new_size < 0)
109		new_size = i_size;
110	return new_size > ip->i_d.di_size ? new_size : 0;
111}
112
113/*
114 * i_flags helper functions
115 */
116static inline void
117__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
118{
119	ip->i_flags |= flags;
120}
121
122static inline void
123xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
124{
125	spin_lock(&ip->i_flags_lock);
126	__xfs_iflags_set(ip, flags);
127	spin_unlock(&ip->i_flags_lock);
128}
129
130static inline void
131xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
132{
133	spin_lock(&ip->i_flags_lock);
134	ip->i_flags &= ~flags;
135	spin_unlock(&ip->i_flags_lock);
136}
137
138static inline int
139__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
140{
141	return (ip->i_flags & flags);
142}
143
144static inline int
145xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
146{
147	int ret;
148	spin_lock(&ip->i_flags_lock);
149	ret = __xfs_iflags_test(ip, flags);
150	spin_unlock(&ip->i_flags_lock);
151	return ret;
152}
153
154static inline int
155xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
156{
157	int ret;
158
159	spin_lock(&ip->i_flags_lock);
160	ret = ip->i_flags & flags;
161	if (ret)
162		ip->i_flags &= ~flags;
163	spin_unlock(&ip->i_flags_lock);
164	return ret;
165}
166
167static inline int
168xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
169{
170	int ret;
171
172	spin_lock(&ip->i_flags_lock);
173	ret = ip->i_flags & flags;
174	if (!ret)
175		ip->i_flags |= flags;
176	spin_unlock(&ip->i_flags_lock);
177	return ret;
178}
179
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
180/*
181 * Project quota id helpers (previously projid was 16bit only
182 * and using two 16bit values to hold new 32bit projid was chosen
183 * to retain compatibility with "old" filesystems).
184 */
185static inline prid_t
186xfs_get_projid(struct xfs_inode *ip)
187{
188	return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
189}
190
191static inline void
192xfs_set_projid(struct xfs_inode *ip,
193		prid_t projid)
194{
195	ip->i_d.di_projid_hi = (uint16_t) (projid >> 16);
196	ip->i_d.di_projid_lo = (uint16_t) (projid & 0xffff);
197}
198
199static inline prid_t
200xfs_get_initial_prid(struct xfs_inode *dp)
201{
202	if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
203		return xfs_get_projid(dp);
204
205	return XFS_PROJID_DEFAULT;
 
 
 
 
 
 
206}
207
208static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
 
 
 
 
 
 
 
 
 
209{
210	return ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK;
 
 
 
 
 
 
 
 
211}
212
213/*
214 * In-core inode flags.
215 */
216#define XFS_IRECLAIM		(1 << 0) /* started reclaiming this inode */
217#define XFS_ISTALE		(1 << 1) /* inode has been staled */
218#define XFS_IRECLAIMABLE	(1 << 2) /* inode can be reclaimed */
219#define __XFS_INEW_BIT		3	 /* inode has just been allocated */
220#define XFS_INEW		(1 << __XFS_INEW_BIT)
221#define XFS_ITRUNCATED		(1 << 5) /* truncated down so flush-on-close */
222#define XFS_IDIRTY_RELEASE	(1 << 6) /* dirty release already seen */
223#define __XFS_IFLOCK_BIT	7	 /* inode is being flushed right now */
224#define XFS_IFLOCK		(1 << __XFS_IFLOCK_BIT)
225#define __XFS_IPINNED_BIT	8	 /* wakeup key for zero pin count */
226#define XFS_IPINNED		(1 << __XFS_IPINNED_BIT)
227#define XFS_IDONTCACHE		(1 << 9) /* don't cache the inode long term */
228#define XFS_IEOFBLOCKS		(1 << 10)/* has the preallocblocks tag set */
229/*
230 * If this unlinked inode is in the middle of recovery, don't let drop_inode
231 * truncate and free the inode.  This can happen if we iget the inode during
232 * log recovery to replay a bmap operation on the inode.
233 */
234#define XFS_IRECOVERY		(1 << 11)
235#define XFS_ICOWBLOCKS		(1 << 12)/* has the cowblocks tag set */
236
237/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
238 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
239 * inode lookup. This prevents unintended behaviour on the new inode from
240 * ocurring.
241 */
242#define XFS_IRECLAIM_RESET_FLAGS	\
243	(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
244	 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED)
245
246/*
247 * Synchronize processes attempting to flush the in-core inode back to disk.
248 */
249
250static inline int xfs_isiflocked(struct xfs_inode *ip)
251{
252	return xfs_iflags_test(ip, XFS_IFLOCK);
253}
254
255extern void __xfs_iflock(struct xfs_inode *ip);
256
257static inline int xfs_iflock_nowait(struct xfs_inode *ip)
258{
259	return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
260}
261
262static inline void xfs_iflock(struct xfs_inode *ip)
263{
264	if (!xfs_iflock_nowait(ip))
265		__xfs_iflock(ip);
266}
267
268static inline void xfs_ifunlock(struct xfs_inode *ip)
269{
270	ASSERT(xfs_isiflocked(ip));
271	xfs_iflags_clear(ip, XFS_IFLOCK);
272	smp_mb();
273	wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
274}
275
276/*
277 * Flags for inode locking.
278 * Bit ranges:	1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
279 *		1<<16 - 1<<32-1 -- lockdep annotation (integers)
280 */
281#define	XFS_IOLOCK_EXCL		(1<<0)
282#define	XFS_IOLOCK_SHARED	(1<<1)
283#define	XFS_ILOCK_EXCL		(1<<2)
284#define	XFS_ILOCK_SHARED	(1<<3)
285#define	XFS_MMAPLOCK_EXCL	(1<<4)
286#define	XFS_MMAPLOCK_SHARED	(1<<5)
287
288#define XFS_LOCK_MASK		(XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
289				| XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
290				| XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
291
292#define XFS_LOCK_FLAGS \
293	{ XFS_IOLOCK_EXCL,	"IOLOCK_EXCL" }, \
294	{ XFS_IOLOCK_SHARED,	"IOLOCK_SHARED" }, \
295	{ XFS_ILOCK_EXCL,	"ILOCK_EXCL" }, \
296	{ XFS_ILOCK_SHARED,	"ILOCK_SHARED" }, \
297	{ XFS_MMAPLOCK_EXCL,	"MMAPLOCK_EXCL" }, \
298	{ XFS_MMAPLOCK_SHARED,	"MMAPLOCK_SHARED" }
299
300
301/*
302 * Flags for lockdep annotations.
303 *
304 * XFS_LOCK_PARENT - for directory operations that require locking a
305 * parent directory inode and a child entry inode. IOLOCK requires nesting,
306 * MMAPLOCK does not support this class, ILOCK requires a single subclass
307 * to differentiate parent from child.
308 *
309 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
310 * inodes do not participate in the normal lock order, and thus have their
311 * own subclasses.
312 *
313 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
314 * with xfs_lock_inodes().  This flag is used as the starting subclass
315 * and each subsequent lock acquired will increment the subclass by one.
316 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
317 * limited to the subclasses we can represent via nesting. We need at least
318 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
319 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
320 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
321 * 8 subclasses supported by lockdep.
322 *
323 * This also means we have to number the sub-classes in the lowest bits of
324 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
325 * mask and we can't use bit-masking to build the subclasses. What a mess.
326 *
327 * Bit layout:
328 *
329 * Bit		Lock Region
330 * 16-19	XFS_IOLOCK_SHIFT dependencies
331 * 20-23	XFS_MMAPLOCK_SHIFT dependencies
332 * 24-31	XFS_ILOCK_SHIFT dependencies
333 *
334 * IOLOCK values
335 *
336 * 0-3		subclass value
337 * 4-7		unused
338 *
339 * MMAPLOCK values
340 *
341 * 0-3		subclass value
342 * 4-7		unused
343 *
344 * ILOCK values
345 * 0-4		subclass values
346 * 5		PARENT subclass (not nestable)
347 * 6		RTBITMAP subclass (not nestable)
348 * 7		RTSUM subclass (not nestable)
349 * 
350 */
351#define XFS_IOLOCK_SHIFT		16
352#define XFS_IOLOCK_MAX_SUBCLASS		3
353#define XFS_IOLOCK_DEP_MASK		0x000f0000
354
355#define XFS_MMAPLOCK_SHIFT		20
356#define XFS_MMAPLOCK_NUMORDER		0
357#define XFS_MMAPLOCK_MAX_SUBCLASS	3
358#define XFS_MMAPLOCK_DEP_MASK		0x00f00000
359
360#define XFS_ILOCK_SHIFT			24
361#define XFS_ILOCK_PARENT_VAL		5
362#define XFS_ILOCK_MAX_SUBCLASS		(XFS_ILOCK_PARENT_VAL - 1)
363#define XFS_ILOCK_RTBITMAP_VAL		6
364#define XFS_ILOCK_RTSUM_VAL		7
365#define XFS_ILOCK_DEP_MASK		0xff000000
366#define	XFS_ILOCK_PARENT		(XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
367#define	XFS_ILOCK_RTBITMAP		(XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
368#define	XFS_ILOCK_RTSUM			(XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
369
370#define XFS_LOCK_SUBCLASS_MASK	(XFS_IOLOCK_DEP_MASK | \
371				 XFS_MMAPLOCK_DEP_MASK | \
372				 XFS_ILOCK_DEP_MASK)
373
374#define XFS_IOLOCK_DEP(flags)	(((flags) & XFS_IOLOCK_DEP_MASK) \
375					>> XFS_IOLOCK_SHIFT)
376#define XFS_MMAPLOCK_DEP(flags)	(((flags) & XFS_MMAPLOCK_DEP_MASK) \
377					>> XFS_MMAPLOCK_SHIFT)
378#define XFS_ILOCK_DEP(flags)	(((flags) & XFS_ILOCK_DEP_MASK) \
379					>> XFS_ILOCK_SHIFT)
380
381/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
382 * For multiple groups support: if S_ISGID bit is set in the parent
383 * directory, group of new file is set to that of the parent, and
384 * new subdirectory gets S_ISGID bit from parent.
385 */
386#define XFS_INHERIT_GID(pip)	\
387	(((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
388	 (VFS_I(pip)->i_mode & S_ISGID))
389
390int		xfs_release(struct xfs_inode *ip);
391void		xfs_inactive(struct xfs_inode *ip);
392int		xfs_lookup(struct xfs_inode *dp, struct xfs_name *name,
393			   struct xfs_inode **ipp, struct xfs_name *ci_name);
394int		xfs_create(struct xfs_inode *dp, struct xfs_name *name,
395			   umode_t mode, dev_t rdev, struct xfs_inode **ipp);
396int		xfs_create_tmpfile(struct xfs_inode *dp, umode_t mode,
397			   struct xfs_inode **ipp);
398int		xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
399			   struct xfs_inode *ip);
400int		xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
401			 struct xfs_name *target_name);
402int		xfs_rename(struct xfs_inode *src_dp, struct xfs_name *src_name,
 
403			   struct xfs_inode *src_ip, struct xfs_inode *target_dp,
404			   struct xfs_name *target_name,
405			   struct xfs_inode *target_ip, unsigned int flags);
406
407void		xfs_ilock(xfs_inode_t *, uint);
408int		xfs_ilock_nowait(xfs_inode_t *, uint);
409void		xfs_iunlock(xfs_inode_t *, uint);
410void		xfs_ilock_demote(xfs_inode_t *, uint);
411int		xfs_isilocked(xfs_inode_t *, uint);
412uint		xfs_ilock_data_map_shared(struct xfs_inode *);
413uint		xfs_ilock_attr_map_shared(struct xfs_inode *);
414
415uint		xfs_ip2xflags(struct xfs_inode *);
416int		xfs_ifree(struct xfs_trans *, xfs_inode_t *,
417			   struct xfs_defer_ops *);
418int		xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
419				      int, xfs_fsize_t);
420void		xfs_iext_realloc(xfs_inode_t *, int, int);
421
 
422void		xfs_iunpin_wait(xfs_inode_t *);
423#define xfs_ipincount(ip)	((unsigned int) atomic_read(&ip->i_pincount))
424
425int		xfs_iflush(struct xfs_inode *, struct xfs_buf **);
426void		xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
427				struct xfs_inode *ip1, uint ip1_mode);
428
429xfs_extlen_t	xfs_get_extsz_hint(struct xfs_inode *ip);
430xfs_extlen_t	xfs_get_cowextsz_hint(struct xfs_inode *ip);
431
432int		xfs_dir_ialloc(struct xfs_trans **, struct xfs_inode *, umode_t,
433			       xfs_nlink_t, dev_t, prid_t,
434			       struct xfs_inode **);
435
436/* from xfs_file.c */
437enum xfs_prealloc_flags {
438	XFS_PREALLOC_SET	= (1 << 1),
439	XFS_PREALLOC_CLEAR	= (1 << 2),
440	XFS_PREALLOC_SYNC	= (1 << 3),
441	XFS_PREALLOC_INVISIBLE	= (1 << 4),
442};
443
444int	xfs_update_prealloc_flags(struct xfs_inode *ip,
445				  enum xfs_prealloc_flags flags);
 
446
447/* from xfs_iops.c */
448extern void xfs_setup_inode(struct xfs_inode *ip);
449extern void xfs_setup_iops(struct xfs_inode *ip);
 
 
 
 
450
451/*
452 * When setting up a newly allocated inode, we need to call
453 * xfs_finish_inode_setup() once the inode is fully instantiated at
454 * the VFS level to prevent the rest of the world seeing the inode
455 * before we've completed instantiation. Otherwise we can do it
456 * the moment the inode lookup is complete.
457 */
458static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
459{
460	xfs_iflags_clear(ip, XFS_INEW);
461	barrier();
462	unlock_new_inode(VFS_I(ip));
463	wake_up_bit(&ip->i_flags, __XFS_INEW_BIT);
464}
465
466static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
467{
468	xfs_setup_inode(ip);
469	xfs_setup_iops(ip);
470	xfs_finish_inode_setup(ip);
471}
472
473#define IHOLD(ip) \
474do { \
475	ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
476	ihold(VFS_I(ip)); \
477	trace_xfs_ihold(ip, _THIS_IP_); \
478} while (0)
479
480#define IRELE(ip) \
481do { \
482	trace_xfs_irele(ip, _THIS_IP_); \
483	iput(VFS_I(ip)); \
484} while (0)
485
486extern struct kmem_zone	*xfs_inode_zone;
487
488/* The default CoW extent size hint. */
489#define XFS_DEFAULT_COWEXTSZ_HINT 32
490
491bool xfs_inode_verify_forks(struct xfs_inode *ip);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
492
493#endif	/* __XFS_INODE_H__ */
v6.13.7
  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	/* cowextsize is only used for v3 inodes, flushiter for v1/2 */
 63	union {
 64		xfs_extlen_t	i_cowextsize;	/* basic cow extent size */
 65		uint16_t	i_flushiter;	/* incremented on flush */
 66	};
 67	uint8_t			i_forkoff;	/* attr fork offset >> 3 */
 68	enum xfs_metafile_type	i_metatype;	/* XFS_METAFILE_* */
 69	uint16_t		i_diflags;	/* XFS_DIFLAG_... */
 70	uint64_t		i_diflags2;	/* XFS_DIFLAG2_... */
 71	struct timespec64	i_crtime;	/* time created */
 72
 73	/*
 74	 * Unlinked list pointers.  These point to the next and previous inodes
 75	 * in the AGI unlinked bucket list, respectively.  These fields can
 76	 * only be updated with the AGI locked.
 77	 *
 78	 * i_next_unlinked caches di_next_unlinked.
 79	 */
 80	xfs_agino_t		i_next_unlinked;
 81
 82	/*
 83	 * If the inode is not on an unlinked list, this field is zero.  If the
 84	 * inode is the first element in an unlinked list, this field is
 85	 * NULLAGINO.  Otherwise, i_prev_unlinked points to the previous inode
 86	 * in the unlinked list.
 87	 */
 88	xfs_agino_t		i_prev_unlinked;
 89
 90	/* VFS inode */
 91	struct inode		i_vnode;	/* embedded VFS inode */
 92
 93	/* pending io completions */
 94	spinlock_t		i_ioend_lock;
 95	struct work_struct	i_ioend_work;
 96	struct list_head	i_ioend_list;
 97} xfs_inode_t;
 98
 99static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
100{
101	return ip->i_prev_unlinked != 0;
102}
103
104static inline bool xfs_inode_has_attr_fork(const struct xfs_inode *ip)
105{
106	return ip->i_forkoff > 0;
107}
108
109static inline struct xfs_ifork *
110xfs_ifork_ptr(
111	struct xfs_inode	*ip,
112	int			whichfork)
113{
114	switch (whichfork) {
115	case XFS_DATA_FORK:
116		return &ip->i_df;
117	case XFS_ATTR_FORK:
118		if (!xfs_inode_has_attr_fork(ip))
119			return NULL;
120		return &ip->i_af;
121	case XFS_COW_FORK:
122		return ip->i_cowfp;
123	default:
124		ASSERT(0);
125		return NULL;
126	}
127}
128
129static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
130{
131	return ip->i_forkoff << 3;
132}
133
134static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip)
135{
136	if (xfs_inode_has_attr_fork(ip))
137		return xfs_inode_fork_boff(ip);
138
139	return XFS_LITINO(ip->i_mount);
140}
141
142static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip)
143{
144	if (xfs_inode_has_attr_fork(ip))
145		return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip);
146	return 0;
147}
148
149static inline unsigned int
150xfs_inode_fork_size(
151	struct xfs_inode	*ip,
152	int			whichfork)
153{
154	switch (whichfork) {
155	case XFS_DATA_FORK:
156		return xfs_inode_data_fork_size(ip);
157	case XFS_ATTR_FORK:
158		return xfs_inode_attr_fork_size(ip);
159	default:
160		return 0;
161	}
162}
163
164/* Convert from vfs inode to xfs inode */
165static inline struct xfs_inode *XFS_I(struct inode *inode)
166{
167	return container_of(inode, struct xfs_inode, i_vnode);
168}
169
170/* convert from xfs inode to vfs inode */
171static inline struct inode *VFS_I(struct xfs_inode *ip)
172{
173	return &ip->i_vnode;
174}
175
176/* convert from const xfs inode to const vfs inode */
177static inline const struct inode *VFS_IC(const struct xfs_inode *ip)
178{
179	return &ip->i_vnode;
180}
181
182/*
183 * For regular files we only update the on-disk filesize when actually
184 * writing data back to disk.  Until then only the copy in the VFS inode
185 * is uptodate.
186 */
187static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
188{
189	if (S_ISREG(VFS_I(ip)->i_mode))
190		return i_size_read(VFS_I(ip));
191	return ip->i_disk_size;
192}
193
194/*
195 * If this I/O goes past the on-disk inode size update it unless it would
196 * be past the current in-core inode size.
197 */
198static inline xfs_fsize_t
199xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
200{
201	xfs_fsize_t i_size = i_size_read(VFS_I(ip));
202
203	if (new_size > i_size || new_size < 0)
204		new_size = i_size;
205	return new_size > ip->i_disk_size ? new_size : 0;
206}
207
208/*
209 * i_flags helper functions
210 */
211static inline void
212__xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
213{
214	ip->i_flags |= flags;
215}
216
217static inline void
218xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
219{
220	spin_lock(&ip->i_flags_lock);
221	__xfs_iflags_set(ip, flags);
222	spin_unlock(&ip->i_flags_lock);
223}
224
225static inline void
226xfs_iflags_clear(xfs_inode_t *ip, unsigned long flags)
227{
228	spin_lock(&ip->i_flags_lock);
229	ip->i_flags &= ~flags;
230	spin_unlock(&ip->i_flags_lock);
231}
232
233static inline int
234__xfs_iflags_test(const struct xfs_inode *ip, unsigned long flags)
235{
236	return (ip->i_flags & flags);
237}
238
239static inline int
240xfs_iflags_test(xfs_inode_t *ip, unsigned long flags)
241{
242	int ret;
243	spin_lock(&ip->i_flags_lock);
244	ret = __xfs_iflags_test(ip, flags);
245	spin_unlock(&ip->i_flags_lock);
246	return ret;
247}
248
249static inline int
250xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned long flags)
251{
252	int ret;
253
254	spin_lock(&ip->i_flags_lock);
255	ret = ip->i_flags & flags;
256	if (ret)
257		ip->i_flags &= ~flags;
258	spin_unlock(&ip->i_flags_lock);
259	return ret;
260}
261
262static inline int
263xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned long flags)
264{
265	int ret;
266
267	spin_lock(&ip->i_flags_lock);
268	ret = ip->i_flags & flags;
269	if (!ret)
270		ip->i_flags |= flags;
271	spin_unlock(&ip->i_flags_lock);
272	return ret;
273}
274
275static inline bool xfs_is_reflink_inode(const struct xfs_inode *ip)
276{
277	return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
278}
279
280static inline bool xfs_is_metadir_inode(const struct xfs_inode *ip)
281{
282	return ip->i_diflags2 & XFS_DIFLAG2_METADATA;
283}
284
285static inline bool xfs_is_internal_inode(const struct xfs_inode *ip)
286{
287	struct xfs_mount	*mp = ip->i_mount;
288
289	/* Any file in the metadata directory tree is a metadata inode. */
290	if (xfs_has_metadir(mp))
291		return xfs_is_metadir_inode(ip);
292
293	/*
294	 * Before metadata directories, the only metadata inodes were the
295	 * three quota files, the realtime bitmap, and the realtime summary.
296	 */
297	return ip->i_ino == mp->m_sb.sb_rbmino ||
298	       ip->i_ino == mp->m_sb.sb_rsumino ||
299	       xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
300}
301
302bool xfs_is_always_cow_inode(const struct xfs_inode *ip);
303
304static inline bool xfs_is_cow_inode(const struct xfs_inode *ip)
305{
306	return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
307}
308
309static inline bool xfs_inode_has_filedata(const struct xfs_inode *ip)
310{
311	return ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0;
312}
313
314/*
315 * Check if an inode has any data in the COW fork.  This might be often false
316 * even for inodes with the reflink flag when there is no pending COW operation.
 
317 */
318static inline bool xfs_inode_has_cow_data(const struct xfs_inode *ip)
 
319{
320	return ip->i_cowfp && ip->i_cowfp->if_bytes;
321}
322
323static inline bool xfs_inode_has_bigtime(const struct xfs_inode *ip)
 
 
324{
325	return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
 
326}
327
328static inline bool xfs_inode_has_large_extent_counts(const struct xfs_inode *ip)
 
329{
330	return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
331}
332
333/*
334 * Decide if this file is a realtime file whose data allocation unit is larger
335 * than a single filesystem block.
336 */
337static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
338{
339	return XFS_IS_REALTIME_INODE(ip) && ip->i_mount->m_sb.sb_rextsize > 1;
340}
341
342/*
343 * Return the buftarg used for data allocations on a given inode.
344 */
345#define xfs_inode_buftarg(ip) \
346	(XFS_IS_REALTIME_INODE(ip) ? \
347		(ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
348
349static inline bool
350xfs_inode_can_atomicwrite(
351	struct xfs_inode	*ip)
352{
353	struct xfs_mount	*mp = ip->i_mount;
354	struct xfs_buftarg	*target = xfs_inode_buftarg(ip);
355
356	if (mp->m_sb.sb_blocksize < target->bt_bdev_awu_min)
357		return false;
358	if (mp->m_sb.sb_blocksize > target->bt_bdev_awu_max)
359		return false;
360
361	return true;
362}
363
364/*
365 * In-core inode flags.
366 */
367#define XFS_IRECLAIM		(1 << 0) /* started reclaiming this inode */
368#define XFS_ISTALE		(1 << 1) /* inode has been staled */
369#define XFS_IRECLAIMABLE	(1 << 2) /* inode can be reclaimed */
370#define XFS_INEW		(1 << 3) /* inode has just been allocated */
371#define XFS_IPRESERVE_DM_FIELDS	(1 << 4) /* has legacy DMAPI fields set */
372#define XFS_ITRUNCATED		(1 << 5) /* truncated down so flush-on-close */
373#define XFS_EOFBLOCKS_RELEASED	(1 << 6) /* eofblocks were freed in ->release */
374#define XFS_IFLUSHING		(1 << 7) /* inode is being flushed */
 
375#define __XFS_IPINNED_BIT	8	 /* wakeup key for zero pin count */
376#define XFS_IPINNED		(1 << __XFS_IPINNED_BIT)
377#define XFS_IEOFBLOCKS		(1 << 9) /* has the preallocblocks tag set */
378#define XFS_NEED_INACTIVE	(1 << 10) /* see XFS_INACTIVATING below */
379/*
380 * If this unlinked inode is in the middle of recovery, don't let drop_inode
381 * truncate and free the inode.  This can happen if we iget the inode during
382 * log recovery to replay a bmap operation on the inode.
383 */
384#define XFS_IRECOVERY		(1 << 11)
385#define XFS_ICOWBLOCKS		(1 << 12)/* has the cowblocks tag set */
386
387/*
388 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
389 * freed, then NEED_INACTIVE will be set.  Once we start the updates, the
390 * INACTIVATING bit will be set to keep iget away from this inode.  After the
391 * inactivation completes, both flags will be cleared and the inode is a
392 * plain old IRECLAIMABLE inode.
393 */
394#define XFS_INACTIVATING	(1 << 13)
395
396/* Quotacheck is running but inode has not been added to quota counts. */
397#define XFS_IQUOTAUNCHECKED	(1 << 14)
398
399/*
400 * Remap in progress. Callers that wish to update file data while
401 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
402 * the lock in exclusive mode. Relocking the file will block until
403 * IREMAPPING is cleared.
404 */
405#define XFS_IREMAPPING		(1U << 15)
406
407/* All inode state flags related to inode reclaim. */
408#define XFS_ALL_IRECLAIM_FLAGS	(XFS_IRECLAIMABLE | \
409				 XFS_IRECLAIM | \
410				 XFS_NEED_INACTIVE | \
411				 XFS_INACTIVATING)
412
413/*
414 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
415 * inode lookup. This prevents unintended behaviour on the new inode from
416 * ocurring.
417 */
418#define XFS_IRECLAIM_RESET_FLAGS	\
419	(XFS_IRECLAIMABLE | XFS_IRECLAIM | \
420	 XFS_EOFBLOCKS_RELEASED | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
421	 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
422
423/*
424 * Flags for inode locking.
425 * Bit ranges:	1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
426 *		1<<16 - 1<<32-1 -- lockdep annotation (integers)
427 */
428#define	XFS_IOLOCK_EXCL		(1u << 0)
429#define	XFS_IOLOCK_SHARED	(1u << 1)
430#define	XFS_ILOCK_EXCL		(1u << 2)
431#define	XFS_ILOCK_SHARED	(1u << 3)
432#define	XFS_MMAPLOCK_EXCL	(1u << 4)
433#define	XFS_MMAPLOCK_SHARED	(1u << 5)
434
435#define XFS_LOCK_MASK		(XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
436				| XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
437				| XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
438
439#define XFS_LOCK_FLAGS \
440	{ XFS_IOLOCK_EXCL,	"IOLOCK_EXCL" }, \
441	{ XFS_IOLOCK_SHARED,	"IOLOCK_SHARED" }, \
442	{ XFS_ILOCK_EXCL,	"ILOCK_EXCL" }, \
443	{ XFS_ILOCK_SHARED,	"ILOCK_SHARED" }, \
444	{ XFS_MMAPLOCK_EXCL,	"MMAPLOCK_EXCL" }, \
445	{ XFS_MMAPLOCK_SHARED,	"MMAPLOCK_SHARED" }
446
447
448/*
449 * Flags for lockdep annotations.
450 *
451 * XFS_LOCK_PARENT - for directory operations that require locking a
452 * parent directory inode and a child entry inode. IOLOCK requires nesting,
453 * MMAPLOCK does not support this class, ILOCK requires a single subclass
454 * to differentiate parent from child.
455 *
456 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
457 * inodes do not participate in the normal lock order, and thus have their
458 * own subclasses.
459 *
460 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
461 * with xfs_lock_inodes().  This flag is used as the starting subclass
462 * and each subsequent lock acquired will increment the subclass by one.
463 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
464 * limited to the subclasses we can represent via nesting. We need at least
465 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
466 * XFS_ILOCK_PARENT, which gives 6 subclasses.  That's 6 of the 8 subclasses
467 * supported by lockdep.
 
468 *
469 * This also means we have to number the sub-classes in the lowest bits of
470 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
471 * mask and we can't use bit-masking to build the subclasses. What a mess.
472 *
473 * Bit layout:
474 *
475 * Bit		Lock Region
476 * 16-19	XFS_IOLOCK_SHIFT dependencies
477 * 20-23	XFS_MMAPLOCK_SHIFT dependencies
478 * 24-31	XFS_ILOCK_SHIFT dependencies
479 *
480 * IOLOCK values
481 *
482 * 0-3		subclass value
483 * 4-7		unused
484 *
485 * MMAPLOCK values
486 *
487 * 0-3		subclass value
488 * 4-7		unused
489 *
490 * ILOCK values
491 * 0-4		subclass values
492 * 5		PARENT subclass (not nestable)
493 * 6		unused
494 * 7		unused
495 * 
496 */
497#define XFS_IOLOCK_SHIFT		16
498#define XFS_IOLOCK_MAX_SUBCLASS		3
499#define XFS_IOLOCK_DEP_MASK		0x000f0000u
500
501#define XFS_MMAPLOCK_SHIFT		20
502#define XFS_MMAPLOCK_NUMORDER		0
503#define XFS_MMAPLOCK_MAX_SUBCLASS	3
504#define XFS_MMAPLOCK_DEP_MASK		0x00f00000u
505
506#define XFS_ILOCK_SHIFT			24
507#define XFS_ILOCK_PARENT_VAL		5u
508#define XFS_ILOCK_MAX_SUBCLASS		(XFS_ILOCK_PARENT_VAL - 1)
509#define XFS_ILOCK_DEP_MASK		0xff000000u
 
 
510#define	XFS_ILOCK_PARENT		(XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
 
 
511
512#define XFS_LOCK_SUBCLASS_MASK	(XFS_IOLOCK_DEP_MASK | \
513				 XFS_MMAPLOCK_DEP_MASK | \
514				 XFS_ILOCK_DEP_MASK)
515
516#define XFS_IOLOCK_DEP(flags)	(((flags) & XFS_IOLOCK_DEP_MASK) \
517					>> XFS_IOLOCK_SHIFT)
518#define XFS_MMAPLOCK_DEP(flags)	(((flags) & XFS_MMAPLOCK_DEP_MASK) \
519					>> XFS_MMAPLOCK_SHIFT)
520#define XFS_ILOCK_DEP(flags)	(((flags) & XFS_ILOCK_DEP_MASK) \
521					>> XFS_ILOCK_SHIFT)
522
523/*
524 * Layouts are broken in the BREAK_WRITE case to ensure that
525 * layout-holders do not collide with local writes. Additionally,
526 * layouts are broken in the BREAK_UNMAP case to make sure the
527 * layout-holder has a consistent view of the file's extent map. While
528 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
529 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
530 * go idle.
531 */
532enum layout_break_reason {
533        BREAK_WRITE,
534        BREAK_UNMAP,
535};
536
537/*
538 * For multiple groups support: if S_ISGID bit is set in the parent
539 * directory, group of new file is set to that of the parent, and
540 * new subdirectory gets S_ISGID bit from parent.
541 */
542#define XFS_INHERIT_GID(pip)	\
543	(xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
 
544
545int		xfs_inactive(struct xfs_inode *ip);
546int		xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
 
547			   struct xfs_inode **ipp, struct xfs_name *ci_name);
548int		xfs_create(const struct xfs_icreate_args *iargs,
549			   struct xfs_name *name, struct xfs_inode **ipp);
550int		xfs_create_tmpfile(const struct xfs_icreate_args *iargs,
551			   struct xfs_inode **ipp);
552int		xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
553			   struct xfs_inode *ip);
554int		xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
555			 struct xfs_name *target_name);
556int		xfs_rename(struct mnt_idmap *idmap,
557			   struct xfs_inode *src_dp, struct xfs_name *src_name,
558			   struct xfs_inode *src_ip, struct xfs_inode *target_dp,
559			   struct xfs_name *target_name,
560			   struct xfs_inode *target_ip, unsigned int flags);
561
562void		xfs_ilock(xfs_inode_t *, uint);
563int		xfs_ilock_nowait(xfs_inode_t *, uint);
564void		xfs_iunlock(xfs_inode_t *, uint);
565void		xfs_ilock_demote(xfs_inode_t *, uint);
566void		xfs_assert_ilocked(struct xfs_inode *, uint);
567uint		xfs_ilock_data_map_shared(struct xfs_inode *);
568uint		xfs_ilock_attr_map_shared(struct xfs_inode *);
569
570int		xfs_ifree(struct xfs_trans *, struct xfs_inode *);
571int		xfs_itruncate_extents_flags(struct xfs_trans **,
572				struct xfs_inode *, int, xfs_fsize_t, int);
 
 
573void		xfs_iext_realloc(xfs_inode_t *, int, int);
574
575int		xfs_log_force_inode(struct xfs_inode *ip);
576void		xfs_iunpin_wait(xfs_inode_t *);
577#define xfs_ipincount(ip)	((unsigned int) atomic_read(&ip->i_pincount))
578
579int		xfs_iflush_cluster(struct xfs_buf *);
580void		xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
581				struct xfs_inode *ip1, uint ip1_mode);
582
583int xfs_icreate(struct xfs_trans *tp, xfs_ino_t ino,
584		const struct xfs_icreate_args *args, struct xfs_inode **ipp);
585
586static inline int
587xfs_itruncate_extents(
588	struct xfs_trans	**tpp,
589	struct xfs_inode	*ip,
590	int			whichfork,
591	xfs_fsize_t		new_size)
592{
593	return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
594}
 
 
595
596int	xfs_break_dax_layouts(struct inode *inode, bool *retry);
597int	xfs_break_layouts(struct inode *inode, uint *iolock,
598		enum layout_break_reason reason);
599
600static inline void xfs_update_stable_writes(struct xfs_inode *ip)
601{
602	if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
603		mapping_set_stable_writes(VFS_I(ip)->i_mapping);
604	else
605		mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
606}
607
608/*
609 * When setting up a newly allocated inode, we need to call
610 * xfs_finish_inode_setup() once the inode is fully instantiated at
611 * the VFS level to prevent the rest of the world seeing the inode
612 * before we've completed instantiation. Otherwise we can do it
613 * the moment the inode lookup is complete.
614 */
615static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
616{
617	xfs_iflags_clear(ip, XFS_INEW);
618	barrier();
619	unlock_new_inode(VFS_I(ip));
 
620}
621
622static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
623{
624	xfs_setup_inode(ip);
625	xfs_setup_iops(ip);
626	xfs_finish_inode_setup(ip);
627}
628
629void xfs_irele(struct xfs_inode *ip);
 
 
 
 
 
 
 
 
 
 
 
630
631extern struct kmem_cache	*xfs_inode_cache;
632
633/* The default CoW extent size hint. */
634#define XFS_DEFAULT_COWEXTSZ_HINT 32
635
636bool xfs_inode_needs_inactive(struct xfs_inode *ip);
637
638struct xfs_inode *xfs_iunlink_lookup(struct xfs_perag *pag, xfs_agino_t agino);
639int xfs_iunlink_reload_next(struct xfs_trans *tp, struct xfs_buf *agibp,
640		xfs_agino_t prev_agino, xfs_agino_t next_agino);
641
642void xfs_end_io(struct work_struct *work);
643
644int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
645void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
646void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
647void xfs_lock_inodes(struct xfs_inode **ips, int inodes, uint lock_mode);
648void xfs_sort_inodes(struct xfs_inode **i_tab, unsigned int num_inodes);
649
650static inline bool
651xfs_inode_unlinked_incomplete(
652	const struct xfs_inode	*ip)
653{
654	return VFS_IC(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
655}
656int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
657int xfs_inode_reload_unlinked(struct xfs_inode *ip);
658
659bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork);
660void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
661		xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
662unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);
663
664int xfs_icreate_dqalloc(const struct xfs_icreate_args *args,
665		struct xfs_dquot **udqpp, struct xfs_dquot **gdqpp,
666		struct xfs_dquot **pdqpp);
667
668#endif	/* __XFS_INODE_H__ */