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1/*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_INODE_H__
19#define __XFS_INODE_H__
20
21struct posix_acl;
22struct xfs_dinode;
23struct xfs_inode;
24
25/*
26 * Fork identifiers.
27 */
28#define XFS_DATA_FORK 0
29#define XFS_ATTR_FORK 1
30
31/*
32 * The following xfs_ext_irec_t struct introduces a second (top) level
33 * to the in-core extent allocation scheme. These structs are allocated
34 * in a contiguous block, creating an indirection array where each entry
35 * (irec) contains a pointer to a buffer of in-core extent records which
36 * it manages. Each extent buffer is 4k in size, since 4k is the system
37 * page size on Linux i386 and systems with larger page sizes don't seem
38 * to gain much, if anything, by using their native page size as the
39 * extent buffer size. Also, using 4k extent buffers everywhere provides
40 * a consistent interface for CXFS across different platforms.
41 *
42 * There is currently no limit on the number of irec's (extent lists)
43 * allowed, so heavily fragmented files may require an indirection array
44 * which spans multiple system pages of memory. The number of extents
45 * which would require this amount of contiguous memory is very large
46 * and should not cause problems in the foreseeable future. However,
47 * if the memory needed for the contiguous array ever becomes a problem,
48 * it is possible that a third level of indirection may be required.
49 */
50typedef struct xfs_ext_irec {
51 xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */
52 xfs_extnum_t er_extoff; /* extent offset in file */
53 xfs_extnum_t er_extcount; /* number of extents in page/block */
54} xfs_ext_irec_t;
55
56/*
57 * File incore extent information, present for each of data & attr forks.
58 */
59#define XFS_IEXT_BUFSZ 4096
60#define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
61#define XFS_INLINE_EXTS 2
62#define XFS_INLINE_DATA 32
63typedef struct xfs_ifork {
64 int if_bytes; /* bytes in if_u1 */
65 int if_real_bytes; /* bytes allocated in if_u1 */
66 struct xfs_btree_block *if_broot; /* file's incore btree root */
67 short if_broot_bytes; /* bytes allocated for root */
68 unsigned char if_flags; /* per-fork flags */
69 unsigned char if_ext_max; /* max # of extent records */
70 union {
71 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
72 xfs_ext_irec_t *if_ext_irec; /* irec map file exts */
73 char *if_data; /* inline file data */
74 } if_u1;
75 union {
76 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
77 /* very small file extents */
78 char if_inline_data[XFS_INLINE_DATA];
79 /* very small file data */
80 xfs_dev_t if_rdev; /* dev number if special */
81 uuid_t if_uuid; /* mount point value */
82 } if_u2;
83} xfs_ifork_t;
84
85/*
86 * Inode location information. Stored in the inode and passed to
87 * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
88 */
89struct xfs_imap {
90 xfs_daddr_t im_blkno; /* starting BB of inode chunk */
91 ushort im_len; /* length in BBs of inode chunk */
92 ushort im_boffset; /* inode offset in block in bytes */
93};
94
95/*
96 * This is the xfs in-core inode structure.
97 * Most of the on-disk inode is embedded in the i_d field.
98 *
99 * The extent pointers/inline file space, however, are managed
100 * separately. The memory for this information is pointed to by
101 * the if_u1 unions depending on the type of the data.
102 * This is used to linearize the array of extents for fast in-core
103 * access. This is used until the file's number of extents
104 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
105 * are accessed through the buffer cache.
106 *
107 * Other state kept in the in-core inode is used for identification,
108 * locking, transactional updating, etc of the inode.
109 *
110 * Generally, we do not want to hold the i_rlock while holding the
111 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
112 *
113 * xfs_iptr_t contains all the inode fields up to and including the
114 * i_mnext and i_mprev fields, it is used as a marker in the inode
115 * chain off the mount structure by xfs_sync calls.
116 */
117
118typedef struct xfs_ictimestamp {
119 __int32_t t_sec; /* timestamp seconds */
120 __int32_t t_nsec; /* timestamp nanoseconds */
121} xfs_ictimestamp_t;
122
123/*
124 * NOTE: This structure must be kept identical to struct xfs_dinode
125 * in xfs_dinode.h except for the endianness annotations.
126 */
127typedef struct xfs_icdinode {
128 __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
129 __uint16_t di_mode; /* mode and type of file */
130 __int8_t di_version; /* inode version */
131 __int8_t di_format; /* format of di_c data */
132 __uint16_t di_onlink; /* old number of links to file */
133 __uint32_t di_uid; /* owner's user id */
134 __uint32_t di_gid; /* owner's group id */
135 __uint32_t di_nlink; /* number of links to file */
136 __uint16_t di_projid_lo; /* lower part of owner's project id */
137 __uint16_t di_projid_hi; /* higher part of owner's project id */
138 __uint8_t di_pad[6]; /* unused, zeroed space */
139 __uint16_t di_flushiter; /* incremented on flush */
140 xfs_ictimestamp_t di_atime; /* time last accessed */
141 xfs_ictimestamp_t di_mtime; /* time last modified */
142 xfs_ictimestamp_t di_ctime; /* time created/inode modified */
143 xfs_fsize_t di_size; /* number of bytes in file */
144 xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
145 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
146 xfs_extnum_t di_nextents; /* number of extents in data fork */
147 xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
148 __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
149 __int8_t di_aformat; /* format of attr fork's data */
150 __uint32_t di_dmevmask; /* DMIG event mask */
151 __uint16_t di_dmstate; /* DMIG state info */
152 __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
153 __uint32_t di_gen; /* generation number */
154} xfs_icdinode_t;
155
156/*
157 * Flags for xfs_ichgtime().
158 */
159#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
160#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
161
162/*
163 * Per-fork incore inode flags.
164 */
165#define XFS_IFINLINE 0x01 /* Inline data is read in */
166#define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
167#define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
168#define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
169
170/*
171 * Fork handling.
172 */
173
174#define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0)
175#define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3))
176
177#define XFS_IFORK_PTR(ip,w) \
178 ((w) == XFS_DATA_FORK ? \
179 &(ip)->i_df : \
180 (ip)->i_afp)
181#define XFS_IFORK_DSIZE(ip) \
182 (XFS_IFORK_Q(ip) ? \
183 XFS_IFORK_BOFF(ip) : \
184 XFS_LITINO((ip)->i_mount))
185#define XFS_IFORK_ASIZE(ip) \
186 (XFS_IFORK_Q(ip) ? \
187 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
188 0)
189#define XFS_IFORK_SIZE(ip,w) \
190 ((w) == XFS_DATA_FORK ? \
191 XFS_IFORK_DSIZE(ip) : \
192 XFS_IFORK_ASIZE(ip))
193#define XFS_IFORK_FORMAT(ip,w) \
194 ((w) == XFS_DATA_FORK ? \
195 (ip)->i_d.di_format : \
196 (ip)->i_d.di_aformat)
197#define XFS_IFORK_FMT_SET(ip,w,n) \
198 ((w) == XFS_DATA_FORK ? \
199 ((ip)->i_d.di_format = (n)) : \
200 ((ip)->i_d.di_aformat = (n)))
201#define XFS_IFORK_NEXTENTS(ip,w) \
202 ((w) == XFS_DATA_FORK ? \
203 (ip)->i_d.di_nextents : \
204 (ip)->i_d.di_anextents)
205#define XFS_IFORK_NEXT_SET(ip,w,n) \
206 ((w) == XFS_DATA_FORK ? \
207 ((ip)->i_d.di_nextents = (n)) : \
208 ((ip)->i_d.di_anextents = (n)))
209
210
211
212#ifdef __KERNEL__
213
214struct bhv_desc;
215struct xfs_buf;
216struct xfs_bmap_free;
217struct xfs_bmbt_irec;
218struct xfs_inode_log_item;
219struct xfs_mount;
220struct xfs_trans;
221struct xfs_dquot;
222
223typedef struct dm_attrs_s {
224 __uint32_t da_dmevmask; /* DMIG event mask */
225 __uint16_t da_dmstate; /* DMIG state info */
226 __uint16_t da_pad; /* DMIG extra padding */
227} dm_attrs_t;
228
229typedef struct xfs_inode {
230 /* Inode linking and identification information. */
231 struct xfs_mount *i_mount; /* fs mount struct ptr */
232 struct xfs_dquot *i_udquot; /* user dquot */
233 struct xfs_dquot *i_gdquot; /* group dquot */
234
235 /* Inode location stuff */
236 xfs_ino_t i_ino; /* inode number (agno/agino)*/
237 struct xfs_imap i_imap; /* location for xfs_imap() */
238
239 /* Extent information. */
240 xfs_ifork_t *i_afp; /* attribute fork pointer */
241 xfs_ifork_t i_df; /* data fork */
242
243 /* Transaction and locking information. */
244 struct xfs_inode_log_item *i_itemp; /* logging information */
245 mrlock_t i_lock; /* inode lock */
246 mrlock_t i_iolock; /* inode IO lock */
247 struct completion i_flush; /* inode flush completion q */
248 atomic_t i_pincount; /* inode pin count */
249 wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
250 spinlock_t i_flags_lock; /* inode i_flags lock */
251 /* Miscellaneous state. */
252 unsigned short i_flags; /* see defined flags below */
253 unsigned char i_update_core; /* timestamps/size is dirty */
254 unsigned int i_delayed_blks; /* count of delay alloc blks */
255
256 xfs_icdinode_t i_d; /* most of ondisk inode */
257
258 xfs_fsize_t i_size; /* in-memory size */
259 xfs_fsize_t i_new_size; /* size when write completes */
260 atomic_t i_iocount; /* outstanding I/O count */
261
262 /* VFS inode */
263 struct inode i_vnode; /* embedded VFS inode */
264} xfs_inode_t;
265
266#define XFS_ISIZE(ip) S_ISREG((ip)->i_d.di_mode) ? \
267 (ip)->i_size : (ip)->i_d.di_size;
268
269/* Convert from vfs inode to xfs inode */
270static inline struct xfs_inode *XFS_I(struct inode *inode)
271{
272 return container_of(inode, struct xfs_inode, i_vnode);
273}
274
275/* convert from xfs inode to vfs inode */
276static inline struct inode *VFS_I(struct xfs_inode *ip)
277{
278 return &ip->i_vnode;
279}
280
281/*
282 * i_flags helper functions
283 */
284static inline void
285__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
286{
287 ip->i_flags |= flags;
288}
289
290static inline void
291xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
292{
293 spin_lock(&ip->i_flags_lock);
294 __xfs_iflags_set(ip, flags);
295 spin_unlock(&ip->i_flags_lock);
296}
297
298static inline void
299xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
300{
301 spin_lock(&ip->i_flags_lock);
302 ip->i_flags &= ~flags;
303 spin_unlock(&ip->i_flags_lock);
304}
305
306static inline int
307__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
308{
309 return (ip->i_flags & flags);
310}
311
312static inline int
313xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
314{
315 int ret;
316 spin_lock(&ip->i_flags_lock);
317 ret = __xfs_iflags_test(ip, flags);
318 spin_unlock(&ip->i_flags_lock);
319 return ret;
320}
321
322static inline int
323xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
324{
325 int ret;
326
327 spin_lock(&ip->i_flags_lock);
328 ret = ip->i_flags & flags;
329 if (ret)
330 ip->i_flags &= ~flags;
331 spin_unlock(&ip->i_flags_lock);
332 return ret;
333}
334
335/*
336 * Project quota id helpers (previously projid was 16bit only
337 * and using two 16bit values to hold new 32bit projid was chosen
338 * to retain compatibility with "old" filesystems).
339 */
340static inline prid_t
341xfs_get_projid(struct xfs_inode *ip)
342{
343 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
344}
345
346static inline void
347xfs_set_projid(struct xfs_inode *ip,
348 prid_t projid)
349{
350 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
351 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
352}
353
354/*
355 * Manage the i_flush queue embedded in the inode. This completion
356 * queue synchronizes processes attempting to flush the in-core
357 * inode back to disk.
358 */
359static inline void xfs_iflock(xfs_inode_t *ip)
360{
361 wait_for_completion(&ip->i_flush);
362}
363
364static inline int xfs_iflock_nowait(xfs_inode_t *ip)
365{
366 return try_wait_for_completion(&ip->i_flush);
367}
368
369static inline void xfs_ifunlock(xfs_inode_t *ip)
370{
371 complete(&ip->i_flush);
372}
373
374/*
375 * In-core inode flags.
376 */
377#define XFS_IRECLAIM 0x0001 /* started reclaiming this inode */
378#define XFS_ISTALE 0x0002 /* inode has been staled */
379#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */
380#define XFS_INEW 0x0008 /* inode has just been allocated */
381#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */
382#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */
383#define XFS_IDIRTY_RELEASE 0x0040 /* dirty release already seen */
384
385/*
386 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
387 * inode lookup. Thi prevents unintended behaviour on the new inode from
388 * ocurring.
389 */
390#define XFS_IRECLAIM_RESET_FLAGS \
391 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
392 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
393 XFS_IFILESTREAM);
394
395/*
396 * Flags for inode locking.
397 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
398 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
399 */
400#define XFS_IOLOCK_EXCL (1<<0)
401#define XFS_IOLOCK_SHARED (1<<1)
402#define XFS_ILOCK_EXCL (1<<2)
403#define XFS_ILOCK_SHARED (1<<3)
404#define XFS_IUNLOCK_NONOTIFY (1<<4)
405
406#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
407 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
408
409#define XFS_LOCK_FLAGS \
410 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
411 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
412 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
413 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
414 { XFS_IUNLOCK_NONOTIFY, "IUNLOCK_NONOTIFY" }
415
416
417/*
418 * Flags for lockdep annotations.
419 *
420 * XFS_LOCK_PARENT - for directory operations that require locking a
421 * parent directory inode and a child entry inode. The parent gets locked
422 * with this flag so it gets a lockdep subclass of 1 and the child entry
423 * lock will have a lockdep subclass of 0.
424 *
425 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
426 * inodes do not participate in the normal lock order, and thus have their
427 * own subclasses.
428 *
429 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
430 * with xfs_lock_inodes(). This flag is used as the starting subclass
431 * and each subsequent lock acquired will increment the subclass by one.
432 * So the first lock acquired will have a lockdep subclass of 4, the
433 * second lock will have a lockdep subclass of 5, and so on. It is
434 * the responsibility of the class builder to shift this to the correct
435 * portion of the lock_mode lockdep mask.
436 */
437#define XFS_LOCK_PARENT 1
438#define XFS_LOCK_RTBITMAP 2
439#define XFS_LOCK_RTSUM 3
440#define XFS_LOCK_INUMORDER 4
441
442#define XFS_IOLOCK_SHIFT 16
443#define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
444
445#define XFS_ILOCK_SHIFT 24
446#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
447#define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
448#define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
449
450#define XFS_IOLOCK_DEP_MASK 0x00ff0000
451#define XFS_ILOCK_DEP_MASK 0xff000000
452#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
453
454#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
455#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
456
457extern struct lock_class_key xfs_iolock_reclaimable;
458
459/*
460 * For multiple groups support: if S_ISGID bit is set in the parent
461 * directory, group of new file is set to that of the parent, and
462 * new subdirectory gets S_ISGID bit from parent.
463 */
464#define XFS_INHERIT_GID(pip) \
465 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
466 ((pip)->i_d.di_mode & S_ISGID))
467
468/*
469 * xfs_iget.c prototypes.
470 */
471int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
472 uint, uint, xfs_inode_t **);
473void xfs_ilock(xfs_inode_t *, uint);
474int xfs_ilock_nowait(xfs_inode_t *, uint);
475void xfs_iunlock(xfs_inode_t *, uint);
476void xfs_ilock_demote(xfs_inode_t *, uint);
477int xfs_isilocked(xfs_inode_t *, uint);
478uint xfs_ilock_map_shared(xfs_inode_t *);
479void xfs_iunlock_map_shared(xfs_inode_t *, uint);
480void xfs_inode_free(struct xfs_inode *ip);
481
482/*
483 * xfs_inode.c prototypes.
484 */
485int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
486 xfs_nlink_t, xfs_dev_t, prid_t, int,
487 struct xfs_buf **, boolean_t *, xfs_inode_t **);
488
489uint xfs_ip2xflags(struct xfs_inode *);
490uint xfs_dic2xflags(struct xfs_dinode *);
491int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
492 struct xfs_bmap_free *);
493int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
494 int, xfs_fsize_t);
495int xfs_itruncate_data(struct xfs_trans **, struct xfs_inode *,
496 xfs_fsize_t);
497int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
498
499void xfs_iext_realloc(xfs_inode_t *, int, int);
500void xfs_iunpin_wait(xfs_inode_t *);
501int xfs_iflush(xfs_inode_t *, uint);
502void xfs_lock_inodes(xfs_inode_t **, int, uint);
503void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
504
505void xfs_synchronize_times(xfs_inode_t *);
506void xfs_mark_inode_dirty(xfs_inode_t *);
507void xfs_mark_inode_dirty_sync(xfs_inode_t *);
508
509#define IHOLD(ip) \
510do { \
511 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
512 ihold(VFS_I(ip)); \
513 trace_xfs_ihold(ip, _THIS_IP_); \
514} while (0)
515
516#define IRELE(ip) \
517do { \
518 trace_xfs_irele(ip, _THIS_IP_); \
519 iput(VFS_I(ip)); \
520} while (0)
521
522#endif /* __KERNEL__ */
523
524/*
525 * Flags for xfs_iget()
526 */
527#define XFS_IGET_CREATE 0x1
528#define XFS_IGET_UNTRUSTED 0x2
529
530int xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
531 xfs_ino_t, struct xfs_dinode **,
532 struct xfs_buf **, int *, uint);
533int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
534 struct xfs_inode *, struct xfs_dinode **,
535 struct xfs_buf **, uint);
536int xfs_iread(struct xfs_mount *, struct xfs_trans *,
537 struct xfs_inode *, uint);
538void xfs_dinode_to_disk(struct xfs_dinode *,
539 struct xfs_icdinode *);
540void xfs_idestroy_fork(struct xfs_inode *, int);
541void xfs_idata_realloc(struct xfs_inode *, int, int);
542void xfs_iroot_realloc(struct xfs_inode *, int, int);
543int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
544int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
545
546xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
547void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
548 xfs_bmbt_irec_t *, int);
549void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
550void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
551void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
552void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
553void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
554void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
555void xfs_iext_realloc_direct(xfs_ifork_t *, int);
556void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
557void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
558void xfs_iext_destroy(xfs_ifork_t *);
559xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
560xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
561xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
562void xfs_iext_irec_init(xfs_ifork_t *);
563xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
564void xfs_iext_irec_remove(xfs_ifork_t *, int);
565void xfs_iext_irec_compact(xfs_ifork_t *);
566void xfs_iext_irec_compact_pages(xfs_ifork_t *);
567void xfs_iext_irec_compact_full(xfs_ifork_t *);
568void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
569
570#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
571
572#if defined(DEBUG)
573void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
574#else
575#define xfs_inobp_check(mp, bp)
576#endif /* DEBUG */
577
578extern struct kmem_zone *xfs_ifork_zone;
579extern struct kmem_zone *xfs_inode_zone;
580extern struct kmem_zone *xfs_ili_zone;
581
582#endif /* __XFS_INODE_H__ */
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 */
15struct xfs_dinode;
16struct xfs_inode;
17struct xfs_buf;
18struct xfs_bmbt_irec;
19struct xfs_inode_log_item;
20struct xfs_mount;
21struct xfs_trans;
22struct xfs_dquot;
23
24typedef 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
97static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip)
98{
99 return ip->i_prev_unlinked != 0;
100}
101
102static inline bool xfs_inode_has_attr_fork(struct xfs_inode *ip)
103{
104 return ip->i_forkoff > 0;
105}
106
107static inline struct xfs_ifork *
108xfs_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
127static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip)
128{
129 return ip->i_forkoff << 3;
130}
131
132static 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
140static 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
147static inline unsigned int
148xfs_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 */
163static 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 */
169static 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 */
175static 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 */
185static 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 */
196static inline xfs_fsize_t
197xfs_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 */
209static inline void
210__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
211{
212 ip->i_flags |= flags;
213}
214
215static inline void
216xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
217{
218 spin_lock(&ip->i_flags_lock);
219 __xfs_iflags_set(ip, flags);
220 spin_unlock(&ip->i_flags_lock);
221}
222
223static inline void
224xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
225{
226 spin_lock(&ip->i_flags_lock);
227 ip->i_flags &= ~flags;
228 spin_unlock(&ip->i_flags_lock);
229}
230
231static inline int
232__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
233{
234 return (ip->i_flags & flags);
235}
236
237static inline int
238xfs_iflags_test(xfs_inode_t *ip, unsigned short 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
247static inline int
248xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short 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
260static inline int
261xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short 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
273static inline prid_t
274xfs_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
282static inline bool xfs_is_reflink_inode(struct xfs_inode *ip)
283{
284 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK;
285}
286
287static 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 */
299static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip)
300{
301 return ip->i_cowfp && ip->i_cowfp->if_bytes;
302}
303
304static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
305{
306 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
307}
308
309static 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 * Return the buftarg used for data allocations on a given inode.
316 */
317#define xfs_inode_buftarg(ip) \
318 (XFS_IS_REALTIME_INODE(ip) ? \
319 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp)
320
321/*
322 * In-core inode flags.
323 */
324#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
325#define XFS_ISTALE (1 << 1) /* inode has been staled */
326#define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
327#define XFS_INEW (1 << 3) /* inode has just been allocated */
328#define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */
329#define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
330#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
331#define XFS_IFLUSHING (1 << 7) /* inode is being flushed */
332#define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
333#define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
334#define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */
335#define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */
336/*
337 * If this unlinked inode is in the middle of recovery, don't let drop_inode
338 * truncate and free the inode. This can happen if we iget the inode during
339 * log recovery to replay a bmap operation on the inode.
340 */
341#define XFS_IRECOVERY (1 << 11)
342#define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */
343
344/*
345 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be
346 * freed, then NEED_INACTIVE will be set. Once we start the updates, the
347 * INACTIVATING bit will be set to keep iget away from this inode. After the
348 * inactivation completes, both flags will be cleared and the inode is a
349 * plain old IRECLAIMABLE inode.
350 */
351#define XFS_INACTIVATING (1 << 13)
352
353/* Quotacheck is running but inode has not been added to quota counts. */
354#define XFS_IQUOTAUNCHECKED (1 << 14)
355
356/*
357 * Remap in progress. Callers that wish to update file data while
358 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake
359 * the lock in exclusive mode. Relocking the file will block until
360 * IREMAPPING is cleared.
361 */
362#define XFS_IREMAPPING (1U << 15)
363
364/* All inode state flags related to inode reclaim. */
365#define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \
366 XFS_IRECLAIM | \
367 XFS_NEED_INACTIVE | \
368 XFS_INACTIVATING)
369
370/*
371 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
372 * inode lookup. This prevents unintended behaviour on the new inode from
373 * ocurring.
374 */
375#define XFS_IRECLAIM_RESET_FLAGS \
376 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
377 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
378 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
379
380/*
381 * Flags for inode locking.
382 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
383 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
384 */
385#define XFS_IOLOCK_EXCL (1u << 0)
386#define XFS_IOLOCK_SHARED (1u << 1)
387#define XFS_ILOCK_EXCL (1u << 2)
388#define XFS_ILOCK_SHARED (1u << 3)
389#define XFS_MMAPLOCK_EXCL (1u << 4)
390#define XFS_MMAPLOCK_SHARED (1u << 5)
391
392#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
393 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
394 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
395
396#define XFS_LOCK_FLAGS \
397 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
398 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
399 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
400 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
401 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \
402 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" }
403
404
405/*
406 * Flags for lockdep annotations.
407 *
408 * XFS_LOCK_PARENT - for directory operations that require locking a
409 * parent directory inode and a child entry inode. IOLOCK requires nesting,
410 * MMAPLOCK does not support this class, ILOCK requires a single subclass
411 * to differentiate parent from child.
412 *
413 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
414 * inodes do not participate in the normal lock order, and thus have their
415 * own subclasses.
416 *
417 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
418 * with xfs_lock_inodes(). This flag is used as the starting subclass
419 * and each subsequent lock acquired will increment the subclass by one.
420 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
421 * limited to the subclasses we can represent via nesting. We need at least
422 * 5 inodes nest depth for the ILOCK through rename, and we also have to support
423 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
424 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
425 * 8 subclasses supported by lockdep.
426 *
427 * This also means we have to number the sub-classes in the lowest bits of
428 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
429 * mask and we can't use bit-masking to build the subclasses. What a mess.
430 *
431 * Bit layout:
432 *
433 * Bit Lock Region
434 * 16-19 XFS_IOLOCK_SHIFT dependencies
435 * 20-23 XFS_MMAPLOCK_SHIFT dependencies
436 * 24-31 XFS_ILOCK_SHIFT dependencies
437 *
438 * IOLOCK values
439 *
440 * 0-3 subclass value
441 * 4-7 unused
442 *
443 * MMAPLOCK values
444 *
445 * 0-3 subclass value
446 * 4-7 unused
447 *
448 * ILOCK values
449 * 0-4 subclass values
450 * 5 PARENT subclass (not nestable)
451 * 6 RTBITMAP subclass (not nestable)
452 * 7 RTSUM subclass (not nestable)
453 *
454 */
455#define XFS_IOLOCK_SHIFT 16
456#define XFS_IOLOCK_MAX_SUBCLASS 3
457#define XFS_IOLOCK_DEP_MASK 0x000f0000u
458
459#define XFS_MMAPLOCK_SHIFT 20
460#define XFS_MMAPLOCK_NUMORDER 0
461#define XFS_MMAPLOCK_MAX_SUBCLASS 3
462#define XFS_MMAPLOCK_DEP_MASK 0x00f00000u
463
464#define XFS_ILOCK_SHIFT 24
465#define XFS_ILOCK_PARENT_VAL 5u
466#define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1)
467#define XFS_ILOCK_RTBITMAP_VAL 6u
468#define XFS_ILOCK_RTSUM_VAL 7u
469#define XFS_ILOCK_DEP_MASK 0xff000000u
470#define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
471#define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
472#define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
473
474#define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \
475 XFS_MMAPLOCK_DEP_MASK | \
476 XFS_ILOCK_DEP_MASK)
477
478#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \
479 >> XFS_IOLOCK_SHIFT)
480#define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
481 >> XFS_MMAPLOCK_SHIFT)
482#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \
483 >> XFS_ILOCK_SHIFT)
484
485/*
486 * Layouts are broken in the BREAK_WRITE case to ensure that
487 * layout-holders do not collide with local writes. Additionally,
488 * layouts are broken in the BREAK_UNMAP case to make sure the
489 * layout-holder has a consistent view of the file's extent map. While
490 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
491 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
492 * go idle.
493 */
494enum layout_break_reason {
495 BREAK_WRITE,
496 BREAK_UNMAP,
497};
498
499/*
500 * For multiple groups support: if S_ISGID bit is set in the parent
501 * directory, group of new file is set to that of the parent, and
502 * new subdirectory gets S_ISGID bit from parent.
503 */
504#define XFS_INHERIT_GID(pip) \
505 (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
506
507int xfs_release(struct xfs_inode *ip);
508int xfs_inactive(struct xfs_inode *ip);
509int xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
510 struct xfs_inode **ipp, struct xfs_name *ci_name);
511int xfs_create(struct mnt_idmap *idmap,
512 struct xfs_inode *dp, struct xfs_name *name,
513 umode_t mode, dev_t rdev, bool need_xattr,
514 struct xfs_inode **ipp);
515int xfs_create_tmpfile(struct mnt_idmap *idmap,
516 struct xfs_inode *dp, umode_t mode,
517 struct xfs_inode **ipp);
518int xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
519 struct xfs_inode *ip);
520int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
521 struct xfs_name *target_name);
522int xfs_rename(struct mnt_idmap *idmap,
523 struct xfs_inode *src_dp, struct xfs_name *src_name,
524 struct xfs_inode *src_ip, struct xfs_inode *target_dp,
525 struct xfs_name *target_name,
526 struct xfs_inode *target_ip, unsigned int flags);
527
528void xfs_ilock(xfs_inode_t *, uint);
529int xfs_ilock_nowait(xfs_inode_t *, uint);
530void xfs_iunlock(xfs_inode_t *, uint);
531void xfs_ilock_demote(xfs_inode_t *, uint);
532void xfs_assert_ilocked(struct xfs_inode *, uint);
533uint xfs_ilock_data_map_shared(struct xfs_inode *);
534uint xfs_ilock_attr_map_shared(struct xfs_inode *);
535
536uint xfs_ip2xflags(struct xfs_inode *);
537int xfs_ifree(struct xfs_trans *, struct xfs_inode *);
538int xfs_itruncate_extents_flags(struct xfs_trans **,
539 struct xfs_inode *, int, xfs_fsize_t, int);
540void xfs_iext_realloc(xfs_inode_t *, int, int);
541
542int xfs_log_force_inode(struct xfs_inode *ip);
543void xfs_iunpin_wait(xfs_inode_t *);
544#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
545
546int xfs_iflush_cluster(struct xfs_buf *);
547void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
548 struct xfs_inode *ip1, uint ip1_mode);
549
550xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
551xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip);
552
553int xfs_init_new_inode(struct mnt_idmap *idmap, struct xfs_trans *tp,
554 struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
555 xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
556 struct xfs_inode **ipp);
557
558static inline int
559xfs_itruncate_extents(
560 struct xfs_trans **tpp,
561 struct xfs_inode *ip,
562 int whichfork,
563 xfs_fsize_t new_size)
564{
565 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
566}
567
568/* from xfs_file.c */
569int xfs_break_dax_layouts(struct inode *inode, bool *retry);
570int xfs_break_layouts(struct inode *inode, uint *iolock,
571 enum layout_break_reason reason);
572
573/* from xfs_iops.c */
574extern void xfs_setup_inode(struct xfs_inode *ip);
575extern void xfs_setup_iops(struct xfs_inode *ip);
576extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
577
578static inline void xfs_update_stable_writes(struct xfs_inode *ip)
579{
580 if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev))
581 mapping_set_stable_writes(VFS_I(ip)->i_mapping);
582 else
583 mapping_clear_stable_writes(VFS_I(ip)->i_mapping);
584}
585
586/*
587 * When setting up a newly allocated inode, we need to call
588 * xfs_finish_inode_setup() once the inode is fully instantiated at
589 * the VFS level to prevent the rest of the world seeing the inode
590 * before we've completed instantiation. Otherwise we can do it
591 * the moment the inode lookup is complete.
592 */
593static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
594{
595 xfs_iflags_clear(ip, XFS_INEW);
596 barrier();
597 unlock_new_inode(VFS_I(ip));
598}
599
600static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
601{
602 xfs_setup_inode(ip);
603 xfs_setup_iops(ip);
604 xfs_finish_inode_setup(ip);
605}
606
607void xfs_irele(struct xfs_inode *ip);
608
609extern struct kmem_cache *xfs_inode_cache;
610
611/* The default CoW extent size hint. */
612#define XFS_DEFAULT_COWEXTSZ_HINT 32
613
614bool xfs_inode_needs_inactive(struct xfs_inode *ip);
615
616void xfs_end_io(struct work_struct *work);
617
618int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
619void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
620void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2);
621
622static inline bool
623xfs_inode_unlinked_incomplete(
624 struct xfs_inode *ip)
625{
626 return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
627}
628int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
629int xfs_inode_reload_unlinked(struct xfs_inode *ip);
630
631bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork);
632void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip,
633 xfs_filblks_t *dblocks, xfs_filblks_t *rblocks);
634
635struct xfs_dir_update_params {
636 const struct xfs_inode *dp;
637 const struct xfs_inode *ip;
638 const struct xfs_name *name;
639 int delta;
640};
641
642#ifdef CONFIG_XFS_LIVE_HOOKS
643void xfs_dir_update_hook(struct xfs_inode *dp, struct xfs_inode *ip,
644 int delta, const struct xfs_name *name);
645
646struct xfs_dir_hook {
647 struct xfs_hook dirent_hook;
648};
649
650void xfs_dir_hook_disable(void);
651void xfs_dir_hook_enable(void);
652
653int xfs_dir_hook_add(struct xfs_mount *mp, struct xfs_dir_hook *hook);
654void xfs_dir_hook_del(struct xfs_mount *mp, struct xfs_dir_hook *hook);
655void xfs_dir_hook_setup(struct xfs_dir_hook *hook, notifier_fn_t mod_fn);
656#else
657# define xfs_dir_update_hook(dp, ip, delta, name) ((void)0)
658#endif /* CONFIG_XFS_LIVE_HOOKS */
659
660#endif /* __XFS_INODE_H__ */