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 struct rw_semaphore 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 /* convert from const xfs inode to const vfs inode */
VFS_IC(const struct xfs_inode * ip)175 static inline const struct inode *VFS_IC(const struct xfs_inode *ip)
176 {
177 return &ip->i_vnode;
178 }
179
180 /*
181 * For regular files we only update the on-disk filesize when actually
182 * writing data back to disk. Until then only the copy in the VFS inode
183 * is uptodate.
184 */
XFS_ISIZE(struct xfs_inode * ip)185 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
186 {
187 if (S_ISREG(VFS_I(ip)->i_mode))
188 return i_size_read(VFS_I(ip));
189 return ip->i_disk_size;
190 }
191
192 /*
193 * If this I/O goes past the on-disk inode size update it unless it would
194 * be past the current in-core inode size.
195 */
196 static inline xfs_fsize_t
xfs_new_eof(struct xfs_inode * ip,xfs_fsize_t new_size)197 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
198 {
199 xfs_fsize_t i_size = i_size_read(VFS_I(ip));
200
201 if (new_size > i_size || new_size < 0)
202 new_size = i_size;
203 return new_size > ip->i_disk_size ? new_size : 0;
204 }
205
206 /*
207 * i_flags helper functions
208 */
209 static inline void
__xfs_iflags_set(xfs_inode_t * ip,unsigned long flags)210 __xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
211 {
212 ip->i_flags |= flags;
213 }
214
215 static inline void
xfs_iflags_set(xfs_inode_t * ip,unsigned long flags)216 xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
217 {
218 spin_lock(&ip->i_flags_lock);
219 __xfs_iflags_set(ip, flags);
220 spin_unlock(&ip->i_flags_lock);
221 }
222
223 static inline void
xfs_iflags_clear(xfs_inode_t * ip,unsigned long flags)224 xfs_iflags_clear(xfs_inode_t *ip, unsigned long flags)
225 {
226 spin_lock(&ip->i_flags_lock);
227 ip->i_flags &= ~flags;
228 spin_unlock(&ip->i_flags_lock);
229 }
230
231 static inline int
__xfs_iflags_test(xfs_inode_t * ip,unsigned long flags)232 __xfs_iflags_test(xfs_inode_t *ip, unsigned long flags)
233 {
234 return (ip->i_flags & flags);
235 }
236
237 static inline int
xfs_iflags_test(xfs_inode_t * ip,unsigned long flags)238 xfs_iflags_test(xfs_inode_t *ip, unsigned long flags)
239 {
240 int ret;
241 spin_lock(&ip->i_flags_lock);
242 ret = __xfs_iflags_test(ip, flags);
243 spin_unlock(&ip->i_flags_lock);
244 return ret;
245 }
246
247 static inline int
xfs_iflags_test_and_clear(xfs_inode_t * ip,unsigned long flags)248 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned long flags)
249 {
250 int ret;
251
252 spin_lock(&ip->i_flags_lock);
253 ret = ip->i_flags & flags;
254 if (ret)
255 ip->i_flags &= ~flags;
256 spin_unlock(&ip->i_flags_lock);
257 return ret;
258 }
259
260 static inline int
xfs_iflags_test_and_set(xfs_inode_t * ip,unsigned long flags)261 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned long flags)
262 {
263 int ret;
264
265 spin_lock(&ip->i_flags_lock);
266 ret = ip->i_flags & flags;
267 if (!ret)
268 ip->i_flags |= flags;
269 spin_unlock(&ip->i_flags_lock);
270 return ret;
271 }
272
273 static inline prid_t
xfs_get_initial_prid(struct xfs_inode * dp)274 xfs_get_initial_prid(struct xfs_inode *dp)
275 {
276 if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT)
277 return dp->i_projid;
278
279 return XFS_PROJID_DEFAULT;
280 }
281
xfs_is_reflink_inode(struct xfs_inode * ip)282 static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
283 {
284 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
285 }
286
xfs_is_metadata_inode(struct xfs_inode * ip)287 static inline bool xfs_is_metadata_inode(struct xfs_inode *ip)
288 {
289 struct xfs_mount *mp = ip->i_mount;
290
291 return ip == mp->m_rbmip || ip == mp->m_rsumip ||
292 xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
293 }
294
295 /*
296 * Check if an inode has any data in the COW fork. This might be often false
297 * even for inodes with the reflink flag when there is no pending COW operation.
298 */
xfs_inode_has_cow_data(struct xfs_inode * ip)299 static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
300 {
301 return ip->i_cowfp && ip->i_cowfp->if_bytes;
302 }
303
xfs_inode_has_bigtime(struct xfs_inode * ip)304 static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
305 {
306 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
307 }
308
xfs_inode_has_large_extent_counts(struct xfs_inode * ip)309 static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip)
310 {
311 return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
312 }
313
314 /*
315 * Decide if this file is a realtime file whose data allocation unit is larger
316 * than a single filesystem block.
317 */
xfs_inode_has_bigrtalloc(struct xfs_inode * ip)318 static inline bool xfs_inode_has_bigrtalloc(struct xfs_inode *ip)
319 {
320 return XFS_IS_REALTIME_INODE(ip) && ip->i_mount->m_sb.sb_rextsize > 1;
321 }
322
323 /*
324 * Return the buftarg used for data allocations on a given inode.
325 */
326 #define xfs_inode_buftarg(ip) \
327 (XFS_IS_REALTIME_INODE(ip) ? \
328 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
329
330 /*
331 * In-core inode flags.
332 */
333 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
334 #define XFS_ISTALE (1 << 1) /* inode has been staled */
335 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
336 #define XFS_INEW (1 << 3) /* inode has just been allocated */
337 #define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
338 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
339 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
340 #define XFS_IFLUSHING (1 << 7) /* inode is being flushed */
341 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
342 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
343 #define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */
344 #define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */
345 /*
346 * If this unlinked inode is in the middle of recovery, don't let drop_inode
347 * truncate and free the inode. This can happen if we iget the inode during
348 * log recovery to replay a bmap operation on the inode.
349 */
350 #define XFS_IRECOVERY (1 << 11)
351 #define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */
352
353 /*
354 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
355 * freed, then NEED_INACTIVE will be set. Once we start the updates, the
356 * INACTIVATING bit will be set to keep iget away from this inode. After the
357 * inactivation completes, both flags will be cleared and the inode is a
358 * plain old IRECLAIMABLE inode.
359 */
360 #define XFS_INACTIVATING (1 << 13)
361
362 /* Quotacheck is running but inode has not been added to quota counts. */
363 #define XFS_IQUOTAUNCHECKED (1 << 14)
364
365 /*
366 * Remap in progress. Callers that wish to update file data while
367 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
368 * the lock in exclusive mode. Relocking the file will block until
369 * IREMAPPING is cleared.
370 */
371 #define XFS_IREMAPPING (1U << 15)
372
373 /* All inode state flags related to inode reclaim. */
374 #define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \
375 XFS_IRECLAIM | \
376 XFS_NEED_INACTIVE | \
377 XFS_INACTIVATING)
378
379 /*
380 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
381 * inode lookup. This prevents unintended behaviour on the new inode from
382 * ocurring.
383 */
384 #define XFS_IRECLAIM_RESET_FLAGS \
385 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
386 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
387 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
388
389 /*
390 * Flags for inode locking.
391 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
392 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
393 */
394 #define XFS_IOLOCK_EXCL (1u << 0)
395 #define XFS_IOLOCK_SHARED (1u << 1)
396 #define XFS_ILOCK_EXCL (1u << 2)
397 #define XFS_ILOCK_SHARED (1u << 3)
398 #define XFS_MMAPLOCK_EXCL (1u << 4)
399 #define XFS_MMAPLOCK_SHARED (1u << 5)
400
401 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
402 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
403 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
404
405 #define XFS_LOCK_FLAGS \
406 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
407 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
408 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
409 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
410 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \
411 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" }
412
413
414 /*
415 * Flags for lockdep annotations.
416 *
417 * XFS_LOCK_PARENT - for directory operations that require locking a
418 * parent directory inode and a child entry inode. IOLOCK requires nesting,
419 * MMAPLOCK does not support this class, ILOCK requires a single subclass
420 * to differentiate parent from child.
421 *
422 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
423 * inodes do not participate in the normal lock order, and thus have their
424 * own subclasses.
425 *
426 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
427 * with xfs_lock_inodes(). This flag is used as the starting subclass
428 * and each subsequent lock acquired will increment the subclass by one.
429 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
430 * limited to the subclasses we can represent via nesting. We need at least
431 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
432 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
433 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
434 * 8 subclasses supported by lockdep.
435 *
436 * This also means we have to number the sub-classes in the lowest bits of
437 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
438 * mask and we can't use bit-masking to build the subclasses. What a mess.
439 *
440 * Bit layout:
441 *
442 * Bit Lock Region
443 * 16-19 XFS_IOLOCK_SHIFT dependencies
444 * 20-23 XFS_MMAPLOCK_SHIFT dependencies
445 * 24-31 XFS_ILOCK_SHIFT dependencies
446 *
447 * IOLOCK values
448 *
449 * 0-3 subclass value
450 * 4-7 unused
451 *
452 * MMAPLOCK values
453 *
454 * 0-3 subclass value
455 * 4-7 unused
456 *
457 * ILOCK values
458 * 0-4 subclass values
459 * 5 PARENT subclass (not nestable)
460 * 6 RTBITMAP subclass (not nestable)
461 * 7 RTSUM subclass (not nestable)
462 *
463 */
464 #define XFS_IOLOCK_SHIFT 16
465 #define XFS_IOLOCK_MAX_SUBCLASS 3
466 #define XFS_IOLOCK_DEP_MASK 0x000f0000u
467
468 #define XFS_MMAPLOCK_SHIFT 20
469 #define XFS_MMAPLOCK_NUMORDER 0
470 #define XFS_MMAPLOCK_MAX_SUBCLASS 3
471 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000u
472
473 #define XFS_ILOCK_SHIFT 24
474 #define XFS_ILOCK_PARENT_VAL 5u
475 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1)
476 #define XFS_ILOCK_RTBITMAP_VAL 6u
477 #define XFS_ILOCK_RTSUM_VAL 7u
478 #define XFS_ILOCK_DEP_MASK 0xff000000u
479 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
480 #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
481 #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
482
483 #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \
484 XFS_MMAPLOCK_DEP_MASK | \
485 XFS_ILOCK_DEP_MASK)
486
487 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \
488 >> XFS_IOLOCK_SHIFT)
489 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
490 >> XFS_MMAPLOCK_SHIFT)
491 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \
492 >> XFS_ILOCK_SHIFT)
493
494 /*
495 * Layouts are broken in the BREAK_WRITE case to ensure that
496 * layout-holders do not collide with local writes. Additionally,
497 * layouts are broken in the BREAK_UNMAP case to make sure the
498 * layout-holder has a consistent view of the file's extent map. While
499 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
500 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
501 * go idle.
502 */
503 enum layout_break_reason {
504 BREAK_WRITE,
505 BREAK_UNMAP,
506 };
507
508 /*
509 * For multiple groups support: if S_ISGID bit is set in the parent
510 * directory, group of new file is set to that of the parent, and
511 * new subdirectory gets S_ISGID bit from parent.
512 */
513 #define XFS_INHERIT_GID(pip) \
514 (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
515
516 int xfs_release(struct xfs_inode *ip);
517 int xfs_inactive(struct xfs_inode *ip);
518 int xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
519 struct xfs_inode **ipp, struct xfs_name *ci_name);
520 int xfs_create(struct mnt_idmap *idmap,
521 struct xfs_inode *dp, struct xfs_name *name,
522 umode_t mode, dev_t rdev, bool need_xattr,
523 struct xfs_inode **ipp);
524 int xfs_create_tmpfile(struct mnt_idmap *idmap,
525 struct xfs_inode *dp, umode_t mode, bool init_xattrs,
526 struct xfs_inode **ipp);
527 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
528 struct xfs_inode *ip);
529 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
530 struct xfs_name *target_name);
531 int xfs_rename(struct mnt_idmap *idmap,
532 struct xfs_inode *src_dp, struct xfs_name *src_name,
533 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
534 struct xfs_name *target_name,
535 struct xfs_inode *target_ip, unsigned int flags);
536
537 void xfs_ilock(xfs_inode_t *, uint);
538 int xfs_ilock_nowait(xfs_inode_t *, uint);
539 void xfs_iunlock(xfs_inode_t *, uint);
540 void xfs_ilock_demote(xfs_inode_t *, uint);
541 void xfs_assert_ilocked(struct xfs_inode *, uint);
542 uint xfs_ilock_data_map_shared(struct xfs_inode *);
543 uint xfs_ilock_attr_map_shared(struct xfs_inode *);
544
545 uint xfs_ip2xflags(struct xfs_inode *);
546 int xfs_ifree(struct xfs_trans *, struct xfs_inode *);
547 int xfs_itruncate_extents_flags(struct xfs_trans **,
548 struct xfs_inode *, int, xfs_fsize_t, int);
549 void xfs_iext_realloc(xfs_inode_t *, int, int);
550
551 int xfs_log_force_inode(struct xfs_inode *ip);
552 void xfs_iunpin_wait(xfs_inode_t *);
553 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
554
555 int xfs_iflush_cluster(struct xfs_buf *);
556 void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
557 struct xfs_inode *ip1, uint ip1_mode);
558
559 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
560 xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip);
561
562 int xfs_init_new_inode(struct mnt_idmap *idmap, struct xfs_trans *tp,
563 struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
564 xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
565 struct xfs_inode **ipp);
566
567 static inline int
xfs_itruncate_extents(struct xfs_trans ** tpp,struct xfs_inode * ip,int whichfork,xfs_fsize_t new_size)568 xfs_itruncate_extents(
569 struct xfs_trans **tpp,
570 struct xfs_inode *ip,
571 int whichfork,
572 xfs_fsize_t new_size)
573 {
574 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
575 }
576
577 int xfs_break_dax_layouts(struct inode *inode, bool *retry);
578 int xfs_break_layouts(struct inode *inode, uint *iolock,
579 enum layout_break_reason reason);
580
xfs_update_stable_writes(struct xfs_inode * ip)581 static inline void xfs_update_stable_writes(struct xfs_inode *ip)
582 {
583 if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
584 mapping_set_stable_writes(VFS_I(ip)->i_mapping);
585 else
586 mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
587 }
588
589 /*
590 * When setting up a newly allocated inode, we need to call
591 * xfs_finish_inode_setup() once the inode is fully instantiated at
592 * the VFS level to prevent the rest of the world seeing the inode
593 * before we've completed instantiation. Otherwise we can do it
594 * the moment the inode lookup is complete.
595 */
xfs_finish_inode_setup(struct xfs_inode * ip)596 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
597 {
598 xfs_iflags_clear(ip, XFS_INEW);
599 barrier();
600 unlock_new_inode(VFS_I(ip));
601 }
602
xfs_setup_existing_inode(struct xfs_inode * ip)603 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
604 {
605 xfs_setup_inode(ip);
606 xfs_setup_iops(ip);
607 xfs_finish_inode_setup(ip);
608 }
609
610 void xfs_irele(struct xfs_inode *ip);
611
612 extern struct kmem_cache *xfs_inode_cache;
613
614 /* The default CoW extent size hint. */
615 #define XFS_DEFAULT_COWEXTSZ_HINT 32
616
617 bool xfs_inode_needs_inactive(struct xfs_inode *ip);
618
619 int xfs_iunlink(struct xfs_trans *tp, struct xfs_inode *ip);
620 int xfs_iunlink_remove(struct xfs_trans *tp, struct xfs_perag *pag,
621 struct xfs_inode *ip);
622 struct xfs_inode *xfs_iunlink_lookup(struct xfs_perag *pag, xfs_agino_t agino);
623
624 void xfs_end_io(struct work_struct *work);
625
626 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
627 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
628 void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
629 int xfs_droplink(struct xfs_trans *tp, struct xfs_inode *ip);
630 void xfs_bumplink(struct xfs_trans *tp, struct xfs_inode *ip);
631 void xfs_lock_inodes(struct xfs_inode **ips, int inodes, uint lock_mode);
632 void xfs_sort_inodes(struct xfs_inode **i_tab, unsigned int num_inodes);
633
634 static inline bool
xfs_inode_unlinked_incomplete(struct xfs_inode * ip)635 xfs_inode_unlinked_incomplete(
636 struct xfs_inode *ip)
637 {
638 return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
639 }
640 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
641 int xfs_inode_reload_unlinked(struct xfs_inode *ip);
642
643 bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork);
644 void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
645 xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
646 unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);
647
648 struct xfs_dir_update_params {
649 const struct xfs_inode *dp;
650 const struct xfs_inode *ip;
651 const struct xfs_name *name;
652 int delta;
653 };
654
655 #ifdef CONFIG_XFS_LIVE_HOOKS
656 void xfs_dir_update_hook(struct xfs_inode *dp, struct xfs_inode *ip,
657 int delta, const struct xfs_name *name);
658
659 struct xfs_dir_hook {
660 struct xfs_hook dirent_hook;
661 };
662
663 void xfs_dir_hook_disable(void);
664 void xfs_dir_hook_enable(void);
665
666 int xfs_dir_hook_add(struct xfs_mount *mp, struct xfs_dir_hook *hook);
667 void xfs_dir_hook_del(struct xfs_mount *mp, struct xfs_dir_hook *hook);
668 void xfs_dir_hook_setup(struct xfs_dir_hook *hook, notifier_fn_t mod_fn);
669 #else
670 # define xfs_dir_update_hook(dp, ip, delta, name) ((void)0)
671 #endif /* CONFIG_XFS_LIVE_HOOKS */
672
673 #endif /* __XFS_INODE_H__ */
674