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
xfs_inode_on_unlinked_list(const struct xfs_inode * ip)97 static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
98 {
99 return ip->i_prev_unlinked != 0;
100 }
101
xfs_inode_has_attr_fork(struct xfs_inode * ip)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 *
xfs_ifork_ptr(struct xfs_inode * ip,int whichfork)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
xfs_inode_fork_boff(struct xfs_inode * ip)127 static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
128 {
129 return ip->i_forkoff << 3;
130 }
131
xfs_inode_data_fork_size(struct xfs_inode * ip)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
xfs_inode_attr_fork_size(struct xfs_inode * ip)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
xfs_inode_fork_size(struct xfs_inode * ip,int whichfork)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 */
XFS_I(struct inode * 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 */
VFS_I(struct xfs_inode * ip)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 */
XFS_ISIZE(struct xfs_inode * ip)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
xfs_new_eof(struct xfs_inode * ip,xfs_fsize_t new_size)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
__xfs_iflags_set(xfs_inode_t * ip,unsigned short flags)204 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
205 {
206 ip->i_flags |= flags;
207 }
208
209 static inline void
xfs_iflags_set(xfs_inode_t * ip,unsigned short flags)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
xfs_iflags_clear(xfs_inode_t * ip,unsigned short flags)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
__xfs_iflags_test(xfs_inode_t * ip,unsigned short flags)226 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
227 {
228 return (ip->i_flags & flags);
229 }
230
231 static inline int
xfs_iflags_test(xfs_inode_t * ip,unsigned short flags)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
xfs_iflags_test_and_clear(xfs_inode_t * ip,unsigned short flags)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
xfs_iflags_test_and_set(xfs_inode_t * ip,unsigned short flags)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
xfs_get_initial_prid(struct xfs_inode * dp)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
xfs_is_reflink_inode(struct xfs_inode * ip)276 static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
277 {
278 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
279 }
280
xfs_is_metadata_inode(struct xfs_inode * ip)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
xfs_inode_has_filedata(const struct xfs_inode * ip)289 static inline bool xfs_inode_has_filedata(const struct xfs_inode *ip)
290 {
291 return ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0;
292 }
293
294 /*
295 * Check if an inode has any data in the COW fork. This might be often false
296 * even for inodes with the reflink flag when there is no pending COW operation.
297 */
xfs_inode_has_cow_data(struct xfs_inode * ip)298 static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
299 {
300 return ip->i_cowfp && ip->i_cowfp->if_bytes;
301 }
302
xfs_inode_has_bigtime(struct xfs_inode * ip)303 static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
304 {
305 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
306 }
307
xfs_inode_has_large_extent_counts(struct xfs_inode * ip)308 static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip)
309 {
310 return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
311 }
312
313 /*
314 * Return the buftarg used for data allocations on a given inode.
315 */
316 #define xfs_inode_buftarg(ip) \
317 (XFS_IS_REALTIME_INODE(ip) ? \
318 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
319
320 /*
321 * In-core inode flags.
322 */
323 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
324 #define XFS_ISTALE (1 << 1) /* inode has been staled */
325 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
326 #define XFS_INEW (1 << 3) /* inode has just been allocated */
327 #define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
328 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
329 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
330 #define XFS_IFLUSHING (1 << 7) /* inode is being flushed */
331 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
332 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
333 #define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */
334 #define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */
335 /*
336 * If this unlinked inode is in the middle of recovery, don't let drop_inode
337 * truncate and free the inode. This can happen if we iget the inode during
338 * log recovery to replay a bmap operation on the inode.
339 */
340 #define XFS_IRECOVERY (1 << 11)
341 #define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */
342
343 /*
344 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
345 * freed, then NEED_INACTIVE will be set. Once we start the updates, the
346 * INACTIVATING bit will be set to keep iget away from this inode. After the
347 * inactivation completes, both flags will be cleared and the inode is a
348 * plain old IRECLAIMABLE inode.
349 */
350 #define XFS_INACTIVATING (1 << 13)
351
352 /* Quotacheck is running but inode has not been added to quota counts. */
353 #define XFS_IQUOTAUNCHECKED (1 << 14)
354
355 /*
356 * Remap in progress. Callers that wish to update file data while
357 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
358 * the lock in exclusive mode. Relocking the file will block until
359 * IREMAPPING is cleared.
360 */
361 #define XFS_IREMAPPING (1U << 15)
362
363 /* All inode state flags related to inode reclaim. */
364 #define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \
365 XFS_IRECLAIM | \
366 XFS_NEED_INACTIVE | \
367 XFS_INACTIVATING)
368
369 /*
370 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
371 * inode lookup. This prevents unintended behaviour on the new inode from
372 * ocurring.
373 */
374 #define XFS_IRECLAIM_RESET_FLAGS \
375 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
376 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
377 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
378
379 /*
380 * Flags for inode locking.
381 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
382 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
383 */
384 #define XFS_IOLOCK_EXCL (1u << 0)
385 #define XFS_IOLOCK_SHARED (1u << 1)
386 #define XFS_ILOCK_EXCL (1u << 2)
387 #define XFS_ILOCK_SHARED (1u << 3)
388 #define XFS_MMAPLOCK_EXCL (1u << 4)
389 #define XFS_MMAPLOCK_SHARED (1u << 5)
390
391 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
392 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
393 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
394
395 #define XFS_LOCK_FLAGS \
396 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
397 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
398 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
399 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
400 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \
401 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" }
402
403
404 /*
405 * Flags for lockdep annotations.
406 *
407 * XFS_LOCK_PARENT - for directory operations that require locking a
408 * parent directory inode and a child entry inode. IOLOCK requires nesting,
409 * MMAPLOCK does not support this class, ILOCK requires a single subclass
410 * to differentiate parent from child.
411 *
412 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
413 * inodes do not participate in the normal lock order, and thus have their
414 * own subclasses.
415 *
416 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
417 * with xfs_lock_inodes(). This flag is used as the starting subclass
418 * and each subsequent lock acquired will increment the subclass by one.
419 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
420 * limited to the subclasses we can represent via nesting. We need at least
421 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
422 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
423 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
424 * 8 subclasses supported by lockdep.
425 *
426 * This also means we have to number the sub-classes in the lowest bits of
427 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
428 * mask and we can't use bit-masking to build the subclasses. What a mess.
429 *
430 * Bit layout:
431 *
432 * Bit Lock Region
433 * 16-19 XFS_IOLOCK_SHIFT dependencies
434 * 20-23 XFS_MMAPLOCK_SHIFT dependencies
435 * 24-31 XFS_ILOCK_SHIFT dependencies
436 *
437 * IOLOCK values
438 *
439 * 0-3 subclass value
440 * 4-7 unused
441 *
442 * MMAPLOCK values
443 *
444 * 0-3 subclass value
445 * 4-7 unused
446 *
447 * ILOCK values
448 * 0-4 subclass values
449 * 5 PARENT subclass (not nestable)
450 * 6 RTBITMAP subclass (not nestable)
451 * 7 RTSUM subclass (not nestable)
452 *
453 */
454 #define XFS_IOLOCK_SHIFT 16
455 #define XFS_IOLOCK_MAX_SUBCLASS 3
456 #define XFS_IOLOCK_DEP_MASK 0x000f0000u
457
458 #define XFS_MMAPLOCK_SHIFT 20
459 #define XFS_MMAPLOCK_NUMORDER 0
460 #define XFS_MMAPLOCK_MAX_SUBCLASS 3
461 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000u
462
463 #define XFS_ILOCK_SHIFT 24
464 #define XFS_ILOCK_PARENT_VAL 5u
465 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1)
466 #define XFS_ILOCK_RTBITMAP_VAL 6u
467 #define XFS_ILOCK_RTSUM_VAL 7u
468 #define XFS_ILOCK_DEP_MASK 0xff000000u
469 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
470 #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
471 #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
472
473 #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \
474 XFS_MMAPLOCK_DEP_MASK | \
475 XFS_ILOCK_DEP_MASK)
476
477 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \
478 >> XFS_IOLOCK_SHIFT)
479 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
480 >> XFS_MMAPLOCK_SHIFT)
481 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \
482 >> XFS_ILOCK_SHIFT)
483
484 /*
485 * Layouts are broken in the BREAK_WRITE case to ensure that
486 * layout-holders do not collide with local writes. Additionally,
487 * layouts are broken in the BREAK_UNMAP case to make sure the
488 * layout-holder has a consistent view of the file's extent map. While
489 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
490 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
491 * go idle.
492 */
493 enum layout_break_reason {
494 BREAK_WRITE,
495 BREAK_UNMAP,
496 };
497
498 /*
499 * For multiple groups support: if S_ISGID bit is set in the parent
500 * directory, group of new file is set to that of the parent, and
501 * new subdirectory gets S_ISGID bit from parent.
502 */
503 #define XFS_INHERIT_GID(pip) \
504 (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
505
506 int xfs_release(struct xfs_inode *ip);
507 int xfs_inactive(struct xfs_inode *ip);
508 int xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
509 struct xfs_inode **ipp, struct xfs_name *ci_name);
510 int xfs_create(struct mnt_idmap *idmap,
511 struct xfs_inode *dp, struct xfs_name *name,
512 umode_t mode, dev_t rdev, bool need_xattr,
513 struct xfs_inode **ipp);
514 int xfs_create_tmpfile(struct mnt_idmap *idmap,
515 struct xfs_inode *dp, umode_t mode,
516 struct xfs_inode **ipp);
517 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
518 struct xfs_inode *ip);
519 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
520 struct xfs_name *target_name);
521 int xfs_rename(struct mnt_idmap *idmap,
522 struct xfs_inode *src_dp, struct xfs_name *src_name,
523 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
524 struct xfs_name *target_name,
525 struct xfs_inode *target_ip, unsigned int flags);
526
527 void xfs_ilock(xfs_inode_t *, uint);
528 int xfs_ilock_nowait(xfs_inode_t *, uint);
529 void xfs_iunlock(xfs_inode_t *, uint);
530 void xfs_ilock_demote(xfs_inode_t *, uint);
531 bool xfs_isilocked(struct xfs_inode *, uint);
532 uint xfs_ilock_data_map_shared(struct xfs_inode *);
533 uint xfs_ilock_attr_map_shared(struct xfs_inode *);
534
535 uint xfs_ip2xflags(struct xfs_inode *);
536 int xfs_ifree(struct xfs_trans *, struct xfs_inode *);
537 int xfs_itruncate_extents_flags(struct xfs_trans **,
538 struct xfs_inode *, int, xfs_fsize_t, int);
539 void xfs_iext_realloc(xfs_inode_t *, int, int);
540
541 int xfs_log_force_inode(struct xfs_inode *ip);
542 void xfs_iunpin_wait(xfs_inode_t *);
543 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
544
545 int xfs_iflush_cluster(struct xfs_buf *);
546 void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
547 struct xfs_inode *ip1, uint ip1_mode);
548
549 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
550 xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip);
551
552 int xfs_init_new_inode(struct mnt_idmap *idmap, struct xfs_trans *tp,
553 struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
554 xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
555 struct xfs_inode **ipp);
556
557 static inline int
xfs_itruncate_extents(struct xfs_trans ** tpp,struct xfs_inode * ip,int whichfork,xfs_fsize_t new_size)558 xfs_itruncate_extents(
559 struct xfs_trans **tpp,
560 struct xfs_inode *ip,
561 int whichfork,
562 xfs_fsize_t new_size)
563 {
564 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
565 }
566
567 /* from xfs_file.c */
568 int xfs_break_dax_layouts(struct inode *inode, bool *retry);
569 int xfs_break_layouts(struct inode *inode, uint *iolock,
570 enum layout_break_reason reason);
571
572 /* from xfs_iops.c */
573 extern void xfs_setup_inode(struct xfs_inode *ip);
574 extern void xfs_setup_iops(struct xfs_inode *ip);
575 extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
576
xfs_update_stable_writes(struct xfs_inode * ip)577 static inline void xfs_update_stable_writes(struct xfs_inode *ip)
578 {
579 if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
580 mapping_set_stable_writes(VFS_I(ip)->i_mapping);
581 else
582 mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
583 }
584
585 /*
586 * When setting up a newly allocated inode, we need to call
587 * xfs_finish_inode_setup() once the inode is fully instantiated at
588 * the VFS level to prevent the rest of the world seeing the inode
589 * before we've completed instantiation. Otherwise we can do it
590 * the moment the inode lookup is complete.
591 */
xfs_finish_inode_setup(struct xfs_inode * ip)592 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
593 {
594 xfs_iflags_clear(ip, XFS_INEW);
595 barrier();
596 unlock_new_inode(VFS_I(ip));
597 }
598
xfs_setup_existing_inode(struct xfs_inode * ip)599 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
600 {
601 xfs_setup_inode(ip);
602 xfs_setup_iops(ip);
603 xfs_finish_inode_setup(ip);
604 }
605
606 void xfs_irele(struct xfs_inode *ip);
607
608 extern struct kmem_cache *xfs_inode_cache;
609
610 /* The default CoW extent size hint. */
611 #define XFS_DEFAULT_COWEXTSZ_HINT 32
612
613 bool xfs_inode_needs_inactive(struct xfs_inode *ip);
614
615 void xfs_end_io(struct work_struct *work);
616
617 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
618 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
619 void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
620
621 static inline bool
xfs_inode_unlinked_incomplete(struct xfs_inode * ip)622 xfs_inode_unlinked_incomplete(
623 struct xfs_inode *ip)
624 {
625 return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
626 }
627 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
628 int xfs_inode_reload_unlinked(struct xfs_inode *ip);
629
630 unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);
631
632 #endif /* __XFS_INODE_H__ */
633