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