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 */
16 struct xfs_dinode;
17 struct xfs_inode;
18 struct xfs_buf;
19 struct xfs_bmbt_irec;
20 struct xfs_inode_log_item;
21 struct xfs_mount;
22 struct xfs_trans;
23 struct xfs_dquot;
24
25 typedef struct xfs_inode {
26 /* Inode linking and identification information. */
27 struct xfs_mount *i_mount; /* fs mount struct ptr */
28 struct xfs_dquot *i_udquot; /* user dquot */
29 struct xfs_dquot *i_gdquot; /* group dquot */
30 struct xfs_dquot *i_pdquot; /* project dquot */
31
32 /* Inode location stuff */
33 xfs_ino_t i_ino; /* inode number (agno/agino)*/
34 struct xfs_imap i_imap; /* location for xfs_imap() */
35
36 /* Extent information. */
37 struct xfs_ifork *i_cowfp; /* copy on write extents */
38 struct xfs_ifork i_df; /* data fork */
39 struct xfs_ifork i_af; /* attribute fork */
40
41 /* Transaction and locking information. */
42 struct xfs_inode_log_item *i_itemp; /* logging information */
43 struct rw_semaphore i_lock; /* inode lock */
44 atomic_t i_pincount; /* inode pin count */
45 struct llist_node i_gclist; /* deferred inactivation list */
46
47 /*
48 * Bitsets of inode metadata that have been checked and/or are sick.
49 * Callers must hold i_flags_lock before accessing this field.
50 */
51 uint16_t i_checked;
52 uint16_t i_sick;
53
54 spinlock_t i_flags_lock; /* inode i_flags lock */
55 /* Miscellaneous state. */
56 unsigned long i_flags; /* see defined flags below */
57 uint64_t i_delayed_blks; /* count of delay alloc blks */
58 xfs_fsize_t i_disk_size; /* number of bytes in file */
59 xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */
60 prid_t i_projid; /* owner's project id */
61 xfs_extlen_t i_extsize; /* basic/minimum extent size */
62 /*
63 * i_used_blocks is used for zoned rtrmap inodes,
64 * i_cowextsize is used for other v3 inodes,
65 * i_flushiter for v1/2 inodes
66 */
67 union {
68 uint32_t i_used_blocks; /* used blocks in RTG */
69 xfs_extlen_t i_cowextsize; /* basic cow extent size */
70 uint16_t i_flushiter; /* incremented on flush */
71 };
72 uint8_t i_forkoff; /* attr fork offset >> 3 */
73 enum xfs_metafile_type i_metatype; /* XFS_METAFILE_* */
74 uint16_t i_diflags; /* XFS_DIFLAG_... */
75 uint64_t i_diflags2; /* XFS_DIFLAG2_... */
76 struct timespec64 i_crtime; /* time created */
77
78 /*
79 * Unlinked list pointers. These point to the next and previous inodes
80 * in the AGI unlinked bucket list, respectively. These fields can
81 * only be updated with the AGI locked.
82 *
83 * i_next_unlinked caches di_next_unlinked.
84 */
85 xfs_agino_t i_next_unlinked;
86
87 /*
88 * If the inode is not on an unlinked list, this field is zero. If the
89 * inode is the first element in an unlinked list, this field is
90 * NULLAGINO. Otherwise, i_prev_unlinked points to the previous inode
91 * in the unlinked list.
92 */
93 xfs_agino_t i_prev_unlinked;
94
95 /* VFS inode */
96 struct inode i_vnode; /* embedded VFS inode */
97
98 /* pending io completions */
99 spinlock_t i_ioend_lock;
100 struct work_struct i_ioend_work;
101 struct list_head i_ioend_list;
102 } xfs_inode_t;
103
xfs_inode_on_unlinked_list(const struct xfs_inode * ip)104 static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
105 {
106 return ip->i_prev_unlinked != 0;
107 }
108
xfs_inode_has_attr_fork(const struct xfs_inode * ip)109 static inline bool xfs_inode_has_attr_fork(const struct xfs_inode *ip)
110 {
111 return ip->i_forkoff > 0;
112 }
113
114 static inline struct xfs_ifork *
xfs_ifork_ptr(struct xfs_inode * ip,int whichfork)115 xfs_ifork_ptr(
116 struct xfs_inode *ip,
117 int whichfork)
118 {
119 switch (whichfork) {
120 case XFS_DATA_FORK:
121 return &ip->i_df;
122 case XFS_ATTR_FORK:
123 if (!xfs_inode_has_attr_fork(ip))
124 return NULL;
125 return &ip->i_af;
126 case XFS_COW_FORK:
127 return ip->i_cowfp;
128 default:
129 ASSERT(0);
130 return NULL;
131 }
132 }
133
xfs_inode_fork_boff(struct xfs_inode * ip)134 static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
135 {
136 return ip->i_forkoff << 3;
137 }
138
xfs_inode_data_fork_size(struct xfs_inode * ip)139 static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip)
140 {
141 if (xfs_inode_has_attr_fork(ip))
142 return xfs_inode_fork_boff(ip);
143
144 return XFS_LITINO(ip->i_mount);
145 }
146
xfs_inode_attr_fork_size(struct xfs_inode * ip)147 static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip)
148 {
149 if (xfs_inode_has_attr_fork(ip))
150 return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip);
151 return 0;
152 }
153
154 static inline unsigned int
xfs_inode_fork_size(struct xfs_inode * ip,int whichfork)155 xfs_inode_fork_size(
156 struct xfs_inode *ip,
157 int whichfork)
158 {
159 switch (whichfork) {
160 case XFS_DATA_FORK:
161 return xfs_inode_data_fork_size(ip);
162 case XFS_ATTR_FORK:
163 return xfs_inode_attr_fork_size(ip);
164 default:
165 return 0;
166 }
167 }
168
169 /* Convert from vfs inode to xfs inode */
XFS_I(struct inode * inode)170 static inline struct xfs_inode *XFS_I(struct inode *inode)
171 {
172 return container_of(inode, struct xfs_inode, i_vnode);
173 }
174
175 /* convert from xfs inode to vfs inode */
VFS_I(struct xfs_inode * ip)176 static inline struct inode *VFS_I(struct xfs_inode *ip)
177 {
178 return &ip->i_vnode;
179 }
180
181 /* convert from const xfs inode to const vfs inode */
VFS_IC(const struct xfs_inode * ip)182 static inline const struct inode *VFS_IC(const struct xfs_inode *ip)
183 {
184 return &ip->i_vnode;
185 }
186
187 /*
188 * For regular files we only update the on-disk filesize when actually
189 * writing data back to disk. Until then only the copy in the VFS inode
190 * is uptodate.
191 */
XFS_ISIZE(struct xfs_inode * ip)192 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
193 {
194 if (S_ISREG(VFS_I(ip)->i_mode))
195 return i_size_read(VFS_I(ip));
196 return ip->i_disk_size;
197 }
198
199 /*
200 * If this I/O goes past the on-disk inode size update it unless it would
201 * be past the current in-core inode size.
202 */
203 static inline xfs_fsize_t
xfs_new_eof(struct xfs_inode * ip,xfs_fsize_t new_size)204 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
205 {
206 xfs_fsize_t i_size = i_size_read(VFS_I(ip));
207
208 if (new_size > i_size || new_size < 0)
209 new_size = i_size;
210 return new_size > ip->i_disk_size ? new_size : 0;
211 }
212
213 /*
214 * i_flags helper functions
215 */
216 static inline void
__xfs_iflags_set(xfs_inode_t * ip,unsigned long flags)217 __xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
218 {
219 ip->i_flags |= flags;
220 }
221
222 static inline void
xfs_iflags_set(xfs_inode_t * ip,unsigned long flags)223 xfs_iflags_set(xfs_inode_t *ip, unsigned long flags)
224 {
225 spin_lock(&ip->i_flags_lock);
226 __xfs_iflags_set(ip, flags);
227 spin_unlock(&ip->i_flags_lock);
228 }
229
230 static inline void
xfs_iflags_clear(xfs_inode_t * ip,unsigned long flags)231 xfs_iflags_clear(xfs_inode_t *ip, unsigned long flags)
232 {
233 spin_lock(&ip->i_flags_lock);
234 ip->i_flags &= ~flags;
235 spin_unlock(&ip->i_flags_lock);
236 }
237
238 static inline int
__xfs_iflags_test(const struct xfs_inode * ip,unsigned long flags)239 __xfs_iflags_test(const struct xfs_inode *ip, unsigned long flags)
240 {
241 return (ip->i_flags & flags);
242 }
243
244 static inline int
xfs_iflags_test(xfs_inode_t * ip,unsigned long flags)245 xfs_iflags_test(xfs_inode_t *ip, unsigned long flags)
246 {
247 int ret;
248 spin_lock(&ip->i_flags_lock);
249 ret = __xfs_iflags_test(ip, flags);
250 spin_unlock(&ip->i_flags_lock);
251 return ret;
252 }
253
254 static inline int
xfs_iflags_test_and_clear(xfs_inode_t * ip,unsigned long flags)255 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned long flags)
256 {
257 int ret;
258
259 spin_lock(&ip->i_flags_lock);
260 ret = ip->i_flags & flags;
261 if (ret)
262 ip->i_flags &= ~flags;
263 spin_unlock(&ip->i_flags_lock);
264 return ret;
265 }
266
267 static inline int
xfs_iflags_test_and_set(xfs_inode_t * ip,unsigned long flags)268 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned long flags)
269 {
270 int ret;
271
272 spin_lock(&ip->i_flags_lock);
273 ret = ip->i_flags & flags;
274 if (!ret)
275 ip->i_flags |= flags;
276 spin_unlock(&ip->i_flags_lock);
277 return ret;
278 }
279
xfs_is_reflink_inode(const struct xfs_inode * ip)280 static inline bool xfs_is_reflink_inode(const struct xfs_inode *ip)
281 {
282 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
283 }
284
xfs_is_metadir_inode(const struct xfs_inode * ip)285 static inline bool xfs_is_metadir_inode(const struct xfs_inode *ip)
286 {
287 return ip->i_diflags2 & XFS_DIFLAG2_METADATA;
288 }
289
xfs_is_internal_inode(const struct xfs_inode * ip)290 static inline bool xfs_is_internal_inode(const struct xfs_inode *ip)
291 {
292 struct xfs_mount *mp = ip->i_mount;
293
294 /* Any file in the metadata directory tree is a metadata inode. */
295 if (xfs_has_metadir(mp))
296 return xfs_is_metadir_inode(ip);
297
298 /*
299 * Before metadata directories, the only metadata inodes were the
300 * three quota files, the realtime bitmap, and the realtime summary.
301 */
302 return ip->i_ino == mp->m_sb.sb_rbmino ||
303 ip->i_ino == mp->m_sb.sb_rsumino ||
304 xfs_is_quota_inode(&mp->m_sb, ip->i_ino);
305 }
306
xfs_is_zoned_inode(const struct xfs_inode * ip)307 static inline bool xfs_is_zoned_inode(const struct xfs_inode *ip)
308 {
309 return xfs_has_zoned(ip->i_mount) && XFS_IS_REALTIME_INODE(ip);
310 }
311
312 bool xfs_is_always_cow_inode(const struct xfs_inode *ip);
313
xfs_is_cow_inode(const struct xfs_inode * ip)314 static inline bool xfs_is_cow_inode(const struct xfs_inode *ip)
315 {
316 return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
317 }
318
xfs_inode_has_filedata(const struct xfs_inode * ip)319 static inline bool xfs_inode_has_filedata(const struct xfs_inode *ip)
320 {
321 return ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0;
322 }
323
324 /*
325 * Check if an inode has any data in the COW fork. This might be often false
326 * even for inodes with the reflink flag when there is no pending COW operation.
327 */
xfs_inode_has_cow_data(const struct xfs_inode * ip)328 static inline bool xfs_inode_has_cow_data(const struct xfs_inode *ip)
329 {
330 return ip->i_cowfp && ip->i_cowfp->if_bytes;
331 }
332
xfs_inode_has_bigtime(const struct xfs_inode * ip)333 static inline bool xfs_inode_has_bigtime(const struct xfs_inode *ip)
334 {
335 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
336 }
337
xfs_inode_has_large_extent_counts(const struct xfs_inode * ip)338 static inline bool xfs_inode_has_large_extent_counts(const struct xfs_inode *ip)
339 {
340 return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
341 }
342
343 /*
344 * Decide if this file is a realtime file whose data allocation unit is larger
345 * than a single filesystem block.
346 */
xfs_inode_has_bigrtalloc(const struct xfs_inode * ip)347 static inline bool xfs_inode_has_bigrtalloc(const struct xfs_inode *ip)
348 {
349 return XFS_IS_REALTIME_INODE(ip) && ip->i_mount->m_sb.sb_rextsize > 1;
350 }
351
352 /*
353 * Return the buftarg used for data allocations on a given inode.
354 */
355 #define xfs_inode_buftarg(ip) \
356 (XFS_IS_REALTIME_INODE(ip) ? \
357 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
358
xfs_inode_can_hw_atomic_write(const struct xfs_inode * ip)359 static inline bool xfs_inode_can_hw_atomic_write(const struct xfs_inode *ip)
360 {
361 if (IS_DAX(VFS_IC(ip)))
362 return false;
363
364 return xfs_inode_buftarg(ip)->bt_awu_max > 0;
365 }
366
xfs_inode_can_sw_atomic_write(const struct xfs_inode * ip)367 static inline bool xfs_inode_can_sw_atomic_write(const struct xfs_inode *ip)
368 {
369 if (IS_DAX(VFS_IC(ip)))
370 return false;
371
372 return xfs_can_sw_atomic_write(ip->i_mount);
373 }
374
375 /*
376 * In-core inode flags.
377 */
378 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
379 #define XFS_ISTALE (1 << 1) /* inode has been staled */
380 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
381 #define XFS_INEW (1 << 3) /* inode has just been allocated */
382 #define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
383 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
384 #define XFS_EOFBLOCKS_RELEASED (1 << 6) /* eofblocks were freed in ->release */
385 #define XFS_IFLUSHING (1 << 7) /* inode is being flushed */
386 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
387 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
388 #define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */
389 #define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */
390 /*
391 * If this unlinked inode is in the middle of recovery, don't let drop_inode
392 * truncate and free the inode. This can happen if we iget the inode during
393 * log recovery to replay a bmap operation on the inode.
394 */
395 #define XFS_IRECOVERY (1 << 11)
396 #define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */
397
398 /*
399 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
400 * freed, then NEED_INACTIVE will be set. Once we start the updates, the
401 * INACTIVATING bit will be set to keep iget away from this inode. After the
402 * inactivation completes, both flags will be cleared and the inode is a
403 * plain old IRECLAIMABLE inode.
404 */
405 #define XFS_INACTIVATING (1 << 13)
406
407 /* Quotacheck is running but inode has not been added to quota counts. */
408 #define XFS_IQUOTAUNCHECKED (1 << 14)
409
410 /*
411 * Remap in progress. Callers that wish to update file data while
412 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
413 * the lock in exclusive mode. Relocking the file will block until
414 * IREMAPPING is cleared.
415 */
416 #define XFS_IREMAPPING (1U << 15)
417
418 /* All inode state flags related to inode reclaim. */
419 #define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \
420 XFS_IRECLAIM | \
421 XFS_NEED_INACTIVE | \
422 XFS_INACTIVATING)
423
424 /*
425 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
426 * inode lookup. This prevents unintended behaviour on the new inode from
427 * ocurring.
428 */
429 #define XFS_IRECLAIM_RESET_FLAGS \
430 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
431 XFS_EOFBLOCKS_RELEASED | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
432 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
433
434 /*
435 * Flags for inode locking.
436 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
437 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
438 */
439 #define XFS_IOLOCK_EXCL (1u << 0)
440 #define XFS_IOLOCK_SHARED (1u << 1)
441 #define XFS_ILOCK_EXCL (1u << 2)
442 #define XFS_ILOCK_SHARED (1u << 3)
443 #define XFS_MMAPLOCK_EXCL (1u << 4)
444 #define XFS_MMAPLOCK_SHARED (1u << 5)
445
446 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
447 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
448 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
449
450 #define XFS_LOCK_FLAGS \
451 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
452 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
453 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
454 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
455 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \
456 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" }
457
458
459 /*
460 * Flags for lockdep annotations.
461 *
462 * XFS_LOCK_PARENT - for directory operations that require locking a
463 * parent directory inode and a child entry inode. IOLOCK requires nesting,
464 * MMAPLOCK does not support this class, ILOCK requires a single subclass
465 * to differentiate parent from child.
466 *
467 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
468 * inodes do not participate in the normal lock order, and thus have their
469 * own subclasses.
470 *
471 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
472 * with xfs_lock_inodes(). This flag is used as the starting subclass
473 * and each subsequent lock acquired will increment the subclass by one.
474 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
475 * limited to the subclasses we can represent via nesting. We need at least
476 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
477 * XFS_ILOCK_PARENT, which gives 6 subclasses. That's 6 of the 8 subclasses
478 * supported by lockdep.
479 *
480 * This also means we have to number the sub-classes in the lowest bits of
481 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
482 * mask and we can't use bit-masking to build the subclasses. What a mess.
483 *
484 * Bit layout:
485 *
486 * Bit Lock Region
487 * 16-19 XFS_IOLOCK_SHIFT dependencies
488 * 20-23 XFS_MMAPLOCK_SHIFT dependencies
489 * 24-31 XFS_ILOCK_SHIFT dependencies
490 *
491 * IOLOCK values
492 *
493 * 0-3 subclass value
494 * 4-7 unused
495 *
496 * MMAPLOCK values
497 *
498 * 0-3 subclass value
499 * 4-7 unused
500 *
501 * ILOCK values
502 * 0-4 subclass values
503 * 5 PARENT subclass (not nestable)
504 * 6 unused
505 * 7 unused
506 *
507 */
508 #define XFS_IOLOCK_SHIFT 16
509 #define XFS_IOLOCK_MAX_SUBCLASS 3
510 #define XFS_IOLOCK_DEP_MASK 0x000f0000u
511
512 #define XFS_MMAPLOCK_SHIFT 20
513 #define XFS_MMAPLOCK_NUMORDER 0
514 #define XFS_MMAPLOCK_MAX_SUBCLASS 3
515 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000u
516
517 #define XFS_ILOCK_SHIFT 24
518 #define XFS_ILOCK_PARENT_VAL 5u
519 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1)
520 #define XFS_ILOCK_DEP_MASK 0xff000000u
521 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
522
523 #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \
524 XFS_MMAPLOCK_DEP_MASK | \
525 XFS_ILOCK_DEP_MASK)
526
527 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \
528 >> XFS_IOLOCK_SHIFT)
529 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
530 >> XFS_MMAPLOCK_SHIFT)
531 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \
532 >> XFS_ILOCK_SHIFT)
533
534 /*
535 * Layouts are broken in the BREAK_WRITE case to ensure that
536 * layout-holders do not collide with local writes. Additionally,
537 * layouts are broken in the BREAK_UNMAP case to make sure the
538 * layout-holder has a consistent view of the file's extent map. While
539 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
540 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
541 * go idle.
542 */
543 enum layout_break_reason {
544 BREAK_WRITE,
545 BREAK_UNMAP,
546 };
547
548 /*
549 * For multiple groups support: if S_ISGID bit is set in the parent
550 * directory, group of new file is set to that of the parent, and
551 * new subdirectory gets S_ISGID bit from parent.
552 */
553 #define XFS_INHERIT_GID(pip) \
554 (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
555
556 int xfs_inactive(struct xfs_inode *ip);
557 int xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
558 struct xfs_inode **ipp, struct xfs_name *ci_name);
559 int xfs_create(const struct xfs_icreate_args *iargs,
560 struct xfs_name *name, struct xfs_inode **ipp);
561 int xfs_create_tmpfile(const struct xfs_icreate_args *iargs,
562 struct xfs_inode **ipp);
563 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
564 struct xfs_inode *ip);
565 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
566 struct xfs_name *target_name);
567 int xfs_rename(struct mnt_idmap *idmap,
568 struct xfs_inode *src_dp, struct xfs_name *src_name,
569 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
570 struct xfs_name *target_name,
571 struct xfs_inode *target_ip, unsigned int flags);
572
573 void xfs_ilock(xfs_inode_t *, uint);
574 int xfs_ilock_nowait(xfs_inode_t *, uint);
575 void xfs_iunlock(xfs_inode_t *, uint);
576 void xfs_ilock_demote(xfs_inode_t *, uint);
577 void xfs_assert_ilocked(struct xfs_inode *, uint);
578 uint xfs_ilock_data_map_shared(struct xfs_inode *);
579 uint xfs_ilock_attr_map_shared(struct xfs_inode *);
580
581 int xfs_ifree(struct xfs_trans *, struct xfs_inode *);
582 int xfs_itruncate_extents_flags(struct xfs_trans **,
583 struct xfs_inode *, int, xfs_fsize_t, int);
584 void xfs_iext_realloc(xfs_inode_t *, int, int);
585
586 int xfs_log_force_inode(struct xfs_inode *ip);
587 void xfs_iunpin_wait(xfs_inode_t *);
588 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
589
590 int xfs_iflush_cluster(struct xfs_buf *);
591 void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
592 struct xfs_inode *ip1, uint ip1_mode);
593
594 int xfs_icreate(struct xfs_trans *tp, xfs_ino_t ino,
595 const struct xfs_icreate_args *args, struct xfs_inode **ipp);
596
597 static inline int
xfs_itruncate_extents(struct xfs_trans ** tpp,struct xfs_inode * ip,int whichfork,xfs_fsize_t new_size)598 xfs_itruncate_extents(
599 struct xfs_trans **tpp,
600 struct xfs_inode *ip,
601 int whichfork,
602 xfs_fsize_t new_size)
603 {
604 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
605 }
606
607 int xfs_break_dax_layouts(struct inode *inode);
608 int xfs_break_layouts(struct inode *inode, uint *iolock,
609 enum layout_break_reason reason);
610
xfs_update_stable_writes(struct xfs_inode * ip)611 static inline void xfs_update_stable_writes(struct xfs_inode *ip)
612 {
613 if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
614 mapping_set_stable_writes(VFS_I(ip)->i_mapping);
615 else
616 mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
617 }
618
619 /*
620 * When setting up a newly allocated inode, we need to call
621 * xfs_finish_inode_setup() once the inode is fully instantiated at
622 * the VFS level to prevent the rest of the world seeing the inode
623 * before we've completed instantiation. Otherwise we can do it
624 * the moment the inode lookup is complete.
625 */
xfs_finish_inode_setup(struct xfs_inode * ip)626 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
627 {
628 xfs_iflags_clear(ip, XFS_INEW);
629 barrier();
630 unlock_new_inode(VFS_I(ip));
631 }
632
xfs_setup_existing_inode(struct xfs_inode * ip)633 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
634 {
635 xfs_setup_inode(ip);
636 xfs_setup_iops(ip);
637 xfs_finish_inode_setup(ip);
638 }
639
640 void xfs_irele(struct xfs_inode *ip);
641
642 extern struct kmem_cache *xfs_inode_cache;
643
644 /* The default CoW extent size hint. */
645 #define XFS_DEFAULT_COWEXTSZ_HINT 32
646
647 bool xfs_inode_needs_inactive(struct xfs_inode *ip);
648
649 struct xfs_inode *xfs_iunlink_lookup(struct xfs_perag *pag, xfs_agino_t agino);
650 int xfs_iunlink_reload_next(struct xfs_trans *tp, struct xfs_buf *agibp,
651 xfs_agino_t prev_agino, xfs_agino_t next_agino);
652
653 void xfs_end_io(struct work_struct *work);
654
655 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
656 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
657 void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
658 void xfs_lock_inodes(struct xfs_inode **ips, int inodes, uint lock_mode);
659 void xfs_sort_inodes(struct xfs_inode **i_tab, unsigned int num_inodes);
660
661 static inline bool
xfs_inode_unlinked_incomplete(const struct xfs_inode * ip)662 xfs_inode_unlinked_incomplete(
663 const struct xfs_inode *ip)
664 {
665 return VFS_IC(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
666 }
667 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
668 int xfs_inode_reload_unlinked(struct xfs_inode *ip);
669
670 bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork);
671 void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
672 xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
673 unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip);
674
675 int xfs_icreate_dqalloc(const struct xfs_icreate_args *args,
676 struct xfs_dquot **udqpp, struct xfs_dquot **gdqpp,
677 struct xfs_dquot **pdqpp);
678
679 #endif /* __XFS_INODE_H__ */
680