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