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
21 struct posix_acl;
22 struct xfs_dinode;
23 struct 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 */
50 typedef 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
63 typedef 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 union {
70 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
71 xfs_ext_irec_t *if_ext_irec; /* irec map file exts */
72 char *if_data; /* inline file data */
73 } if_u1;
74 union {
75 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
76 /* very small file extents */
77 char if_inline_data[XFS_INLINE_DATA];
78 /* very small file data */
79 xfs_dev_t if_rdev; /* dev number if special */
80 uuid_t if_uuid; /* mount point value */
81 } if_u2;
82 } xfs_ifork_t;
83
84 /*
85 * Inode location information. Stored in the inode and passed to
86 * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
87 */
88 struct xfs_imap {
89 xfs_daddr_t im_blkno; /* starting BB of inode chunk */
90 ushort im_len; /* length in BBs of inode chunk */
91 ushort im_boffset; /* inode offset in block in bytes */
92 };
93
94 /*
95 * This is the xfs in-core inode structure.
96 * Most of the on-disk inode is embedded in the i_d field.
97 *
98 * The extent pointers/inline file space, however, are managed
99 * separately. The memory for this information is pointed to by
100 * the if_u1 unions depending on the type of the data.
101 * This is used to linearize the array of extents for fast in-core
102 * access. This is used until the file's number of extents
103 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
104 * are accessed through the buffer cache.
105 *
106 * Other state kept in the in-core inode is used for identification,
107 * locking, transactional updating, etc of the inode.
108 *
109 * Generally, we do not want to hold the i_rlock while holding the
110 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
111 *
112 * xfs_iptr_t contains all the inode fields up to and including the
113 * i_mnext and i_mprev fields, it is used as a marker in the inode
114 * chain off the mount structure by xfs_sync calls.
115 */
116
117 typedef struct xfs_ictimestamp {
118 __int32_t t_sec; /* timestamp seconds */
119 __int32_t t_nsec; /* timestamp nanoseconds */
120 } xfs_ictimestamp_t;
121
122 /*
123 * NOTE: This structure must be kept identical to struct xfs_dinode
124 * in xfs_dinode.h except for the endianness annotations.
125 */
126 typedef struct xfs_icdinode {
127 __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
128 __uint16_t di_mode; /* mode and type of file */
129 __int8_t di_version; /* inode version */
130 __int8_t di_format; /* format of di_c data */
131 __uint16_t di_onlink; /* old number of links to file */
132 __uint32_t di_uid; /* owner's user id */
133 __uint32_t di_gid; /* owner's group id */
134 __uint32_t di_nlink; /* number of links to file */
135 __uint16_t di_projid_lo; /* lower part of owner's project id */
136 __uint16_t di_projid_hi; /* higher part of owner's project id */
137 __uint8_t di_pad[6]; /* unused, zeroed space */
138 __uint16_t di_flushiter; /* incremented on flush */
139 xfs_ictimestamp_t di_atime; /* time last accessed */
140 xfs_ictimestamp_t di_mtime; /* time last modified */
141 xfs_ictimestamp_t di_ctime; /* time created/inode modified */
142 xfs_fsize_t di_size; /* number of bytes in file */
143 xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
144 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
145 xfs_extnum_t di_nextents; /* number of extents in data fork */
146 xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
147 __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
148 __int8_t di_aformat; /* format of attr fork's data */
149 __uint32_t di_dmevmask; /* DMIG event mask */
150 __uint16_t di_dmstate; /* DMIG state info */
151 __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
152 __uint32_t di_gen; /* generation number */
153 } xfs_icdinode_t;
154
155 /*
156 * Flags for xfs_ichgtime().
157 */
158 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
159 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
160
161 /*
162 * Per-fork incore inode flags.
163 */
164 #define XFS_IFINLINE 0x01 /* Inline data is read in */
165 #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
166 #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
167 #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
168
169 /*
170 * Fork handling.
171 */
172
173 #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0)
174 #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3))
175
176 #define XFS_IFORK_PTR(ip,w) \
177 ((w) == XFS_DATA_FORK ? \
178 &(ip)->i_df : \
179 (ip)->i_afp)
180 #define XFS_IFORK_DSIZE(ip) \
181 (XFS_IFORK_Q(ip) ? \
182 XFS_IFORK_BOFF(ip) : \
183 XFS_LITINO((ip)->i_mount))
184 #define XFS_IFORK_ASIZE(ip) \
185 (XFS_IFORK_Q(ip) ? \
186 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
187 0)
188 #define XFS_IFORK_SIZE(ip,w) \
189 ((w) == XFS_DATA_FORK ? \
190 XFS_IFORK_DSIZE(ip) : \
191 XFS_IFORK_ASIZE(ip))
192 #define XFS_IFORK_FORMAT(ip,w) \
193 ((w) == XFS_DATA_FORK ? \
194 (ip)->i_d.di_format : \
195 (ip)->i_d.di_aformat)
196 #define XFS_IFORK_FMT_SET(ip,w,n) \
197 ((w) == XFS_DATA_FORK ? \
198 ((ip)->i_d.di_format = (n)) : \
199 ((ip)->i_d.di_aformat = (n)))
200 #define XFS_IFORK_NEXTENTS(ip,w) \
201 ((w) == XFS_DATA_FORK ? \
202 (ip)->i_d.di_nextents : \
203 (ip)->i_d.di_anextents)
204 #define XFS_IFORK_NEXT_SET(ip,w,n) \
205 ((w) == XFS_DATA_FORK ? \
206 ((ip)->i_d.di_nextents = (n)) : \
207 ((ip)->i_d.di_anextents = (n)))
208 #define XFS_IFORK_MAXEXT(ip, w) \
209 (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t))
210
211
212 #ifdef __KERNEL__
213
214 struct xfs_buf;
215 struct xfs_bmap_free;
216 struct xfs_bmbt_irec;
217 struct xfs_inode_log_item;
218 struct xfs_mount;
219 struct xfs_trans;
220 struct xfs_dquot;
221
222 typedef struct xfs_inode {
223 /* Inode linking and identification information. */
224 struct xfs_mount *i_mount; /* fs mount struct ptr */
225 struct xfs_dquot *i_udquot; /* user dquot */
226 struct xfs_dquot *i_gdquot; /* group dquot */
227
228 /* Inode location stuff */
229 xfs_ino_t i_ino; /* inode number (agno/agino)*/
230 struct xfs_imap i_imap; /* location for xfs_imap() */
231
232 /* Extent information. */
233 xfs_ifork_t *i_afp; /* attribute fork pointer */
234 xfs_ifork_t i_df; /* data fork */
235
236 /* Transaction and locking information. */
237 struct xfs_inode_log_item *i_itemp; /* logging information */
238 mrlock_t i_lock; /* inode lock */
239 mrlock_t i_iolock; /* inode IO lock */
240 atomic_t i_pincount; /* inode pin count */
241 spinlock_t i_flags_lock; /* inode i_flags lock */
242 /* Miscellaneous state. */
243 unsigned long i_flags; /* see defined flags below */
244 unsigned int i_delayed_blks; /* count of delay alloc blks */
245
246 xfs_icdinode_t i_d; /* most of ondisk inode */
247
248 /* VFS inode */
249 struct inode i_vnode; /* embedded VFS inode */
250 } xfs_inode_t;
251
252 /* Convert from vfs inode to xfs inode */
XFS_I(struct inode * inode)253 static inline struct xfs_inode *XFS_I(struct inode *inode)
254 {
255 return container_of(inode, struct xfs_inode, i_vnode);
256 }
257
258 /* convert from xfs inode to vfs inode */
VFS_I(struct xfs_inode * ip)259 static inline struct inode *VFS_I(struct xfs_inode *ip)
260 {
261 return &ip->i_vnode;
262 }
263
264 /*
265 * For regular files we only update the on-disk filesize when actually
266 * writing data back to disk. Until then only the copy in the VFS inode
267 * is uptodate.
268 */
XFS_ISIZE(struct xfs_inode * ip)269 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
270 {
271 if (S_ISREG(ip->i_d.di_mode))
272 return i_size_read(VFS_I(ip));
273 return ip->i_d.di_size;
274 }
275
276 /*
277 * If this I/O goes past the on-disk inode size update it unless it would
278 * be past the current in-core inode size.
279 */
280 static inline xfs_fsize_t
xfs_new_eof(struct xfs_inode * ip,xfs_fsize_t new_size)281 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
282 {
283 xfs_fsize_t i_size = i_size_read(VFS_I(ip));
284
285 if (new_size > i_size)
286 new_size = i_size;
287 return new_size > ip->i_d.di_size ? new_size : 0;
288 }
289
290 /*
291 * i_flags helper functions
292 */
293 static inline void
__xfs_iflags_set(xfs_inode_t * ip,unsigned short flags)294 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
295 {
296 ip->i_flags |= flags;
297 }
298
299 static inline void
xfs_iflags_set(xfs_inode_t * ip,unsigned short flags)300 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
301 {
302 spin_lock(&ip->i_flags_lock);
303 __xfs_iflags_set(ip, flags);
304 spin_unlock(&ip->i_flags_lock);
305 }
306
307 static inline void
xfs_iflags_clear(xfs_inode_t * ip,unsigned short flags)308 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
309 {
310 spin_lock(&ip->i_flags_lock);
311 ip->i_flags &= ~flags;
312 spin_unlock(&ip->i_flags_lock);
313 }
314
315 static inline int
__xfs_iflags_test(xfs_inode_t * ip,unsigned short flags)316 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
317 {
318 return (ip->i_flags & flags);
319 }
320
321 static inline int
xfs_iflags_test(xfs_inode_t * ip,unsigned short flags)322 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
323 {
324 int ret;
325 spin_lock(&ip->i_flags_lock);
326 ret = __xfs_iflags_test(ip, flags);
327 spin_unlock(&ip->i_flags_lock);
328 return ret;
329 }
330
331 static inline int
xfs_iflags_test_and_clear(xfs_inode_t * ip,unsigned short flags)332 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
333 {
334 int ret;
335
336 spin_lock(&ip->i_flags_lock);
337 ret = ip->i_flags & flags;
338 if (ret)
339 ip->i_flags &= ~flags;
340 spin_unlock(&ip->i_flags_lock);
341 return ret;
342 }
343
344 static inline int
xfs_iflags_test_and_set(xfs_inode_t * ip,unsigned short flags)345 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
346 {
347 int ret;
348
349 spin_lock(&ip->i_flags_lock);
350 ret = ip->i_flags & flags;
351 if (!ret)
352 ip->i_flags |= flags;
353 spin_unlock(&ip->i_flags_lock);
354 return ret;
355 }
356
357 /*
358 * Project quota id helpers (previously projid was 16bit only
359 * and using two 16bit values to hold new 32bit projid was chosen
360 * to retain compatibility with "old" filesystems).
361 */
362 static inline prid_t
xfs_get_projid(struct xfs_inode * ip)363 xfs_get_projid(struct xfs_inode *ip)
364 {
365 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
366 }
367
368 static inline void
xfs_set_projid(struct xfs_inode * ip,prid_t projid)369 xfs_set_projid(struct xfs_inode *ip,
370 prid_t projid)
371 {
372 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
373 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
374 }
375
376 /*
377 * In-core inode flags.
378 */
379 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
380 #define XFS_ISTALE (1 << 1) /* inode has been staled */
381 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
382 #define XFS_INEW (1 << 3) /* inode has just been allocated */
383 #define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
384 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
385 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
386 #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
387 #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
388 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
389 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
390 #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */
391
392 /*
393 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
394 * inode lookup. This prevents unintended behaviour on the new inode from
395 * ocurring.
396 */
397 #define XFS_IRECLAIM_RESET_FLAGS \
398 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
399 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
400 XFS_IFILESTREAM);
401
402 /*
403 * Synchronize processes attempting to flush the in-core inode back to disk.
404 */
405
406 extern void __xfs_iflock(struct xfs_inode *ip);
407
xfs_iflock_nowait(struct xfs_inode * ip)408 static inline int xfs_iflock_nowait(struct xfs_inode *ip)
409 {
410 return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
411 }
412
xfs_iflock(struct xfs_inode * ip)413 static inline void xfs_iflock(struct xfs_inode *ip)
414 {
415 if (!xfs_iflock_nowait(ip))
416 __xfs_iflock(ip);
417 }
418
xfs_ifunlock(struct xfs_inode * ip)419 static inline void xfs_ifunlock(struct xfs_inode *ip)
420 {
421 xfs_iflags_clear(ip, XFS_IFLOCK);
422 wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
423 }
424
xfs_isiflocked(struct xfs_inode * ip)425 static inline int xfs_isiflocked(struct xfs_inode *ip)
426 {
427 return xfs_iflags_test(ip, XFS_IFLOCK);
428 }
429
430 /*
431 * Flags for inode locking.
432 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
433 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
434 */
435 #define XFS_IOLOCK_EXCL (1<<0)
436 #define XFS_IOLOCK_SHARED (1<<1)
437 #define XFS_ILOCK_EXCL (1<<2)
438 #define XFS_ILOCK_SHARED (1<<3)
439
440 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
441 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
442
443 #define XFS_LOCK_FLAGS \
444 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
445 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
446 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
447 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }
448
449
450 /*
451 * Flags for lockdep annotations.
452 *
453 * XFS_LOCK_PARENT - for directory operations that require locking a
454 * parent directory inode and a child entry inode. The parent gets locked
455 * with this flag so it gets a lockdep subclass of 1 and the child entry
456 * lock will have a lockdep subclass of 0.
457 *
458 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
459 * inodes do not participate in the normal lock order, and thus have their
460 * own subclasses.
461 *
462 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
463 * with xfs_lock_inodes(). This flag is used as the starting subclass
464 * and each subsequent lock acquired will increment the subclass by one.
465 * So the first lock acquired will have a lockdep subclass of 4, the
466 * second lock will have a lockdep subclass of 5, and so on. It is
467 * the responsibility of the class builder to shift this to the correct
468 * portion of the lock_mode lockdep mask.
469 */
470 #define XFS_LOCK_PARENT 1
471 #define XFS_LOCK_RTBITMAP 2
472 #define XFS_LOCK_RTSUM 3
473 #define XFS_LOCK_INUMORDER 4
474
475 #define XFS_IOLOCK_SHIFT 16
476 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
477
478 #define XFS_ILOCK_SHIFT 24
479 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
480 #define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
481 #define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
482
483 #define XFS_IOLOCK_DEP_MASK 0x00ff0000
484 #define XFS_ILOCK_DEP_MASK 0xff000000
485 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
486
487 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
488 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
489
490 extern struct lock_class_key xfs_iolock_reclaimable;
491
492 /*
493 * For multiple groups support: if S_ISGID bit is set in the parent
494 * directory, group of new file is set to that of the parent, and
495 * new subdirectory gets S_ISGID bit from parent.
496 */
497 #define XFS_INHERIT_GID(pip) \
498 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
499 ((pip)->i_d.di_mode & S_ISGID))
500
501 /*
502 * xfs_iget.c prototypes.
503 */
504 int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
505 uint, uint, xfs_inode_t **);
506 void xfs_ilock(xfs_inode_t *, uint);
507 int xfs_ilock_nowait(xfs_inode_t *, uint);
508 void xfs_iunlock(xfs_inode_t *, uint);
509 void xfs_ilock_demote(xfs_inode_t *, uint);
510 int xfs_isilocked(xfs_inode_t *, uint);
511 uint xfs_ilock_map_shared(xfs_inode_t *);
512 void xfs_iunlock_map_shared(xfs_inode_t *, uint);
513 void xfs_inode_free(struct xfs_inode *ip);
514
515 /*
516 * xfs_inode.c prototypes.
517 */
518 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
519 xfs_nlink_t, xfs_dev_t, prid_t, int,
520 struct xfs_buf **, boolean_t *, xfs_inode_t **);
521
522 uint xfs_ip2xflags(struct xfs_inode *);
523 uint xfs_dic2xflags(struct xfs_dinode *);
524 int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
525 struct xfs_bmap_free *);
526 int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
527 int, xfs_fsize_t);
528 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
529
530 void xfs_iext_realloc(xfs_inode_t *, int, int);
531 void xfs_iunpin_wait(xfs_inode_t *);
532 int xfs_iflush(xfs_inode_t *, uint);
533 void xfs_promote_inode(struct xfs_inode *);
534 void xfs_lock_inodes(xfs_inode_t **, int, uint);
535 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
536
537 #define IHOLD(ip) \
538 do { \
539 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
540 ihold(VFS_I(ip)); \
541 trace_xfs_ihold(ip, _THIS_IP_); \
542 } while (0)
543
544 #define IRELE(ip) \
545 do { \
546 trace_xfs_irele(ip, _THIS_IP_); \
547 iput(VFS_I(ip)); \
548 } while (0)
549
550 #endif /* __KERNEL__ */
551
552 /*
553 * Flags for xfs_iget()
554 */
555 #define XFS_IGET_CREATE 0x1
556 #define XFS_IGET_UNTRUSTED 0x2
557 #define XFS_IGET_DONTCACHE 0x4
558
559 int xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
560 xfs_ino_t, struct xfs_dinode **,
561 struct xfs_buf **, int *, uint);
562 int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
563 struct xfs_inode *, struct xfs_dinode **,
564 struct xfs_buf **, uint);
565 int xfs_iread(struct xfs_mount *, struct xfs_trans *,
566 struct xfs_inode *, uint);
567 void xfs_dinode_to_disk(struct xfs_dinode *,
568 struct xfs_icdinode *);
569 void xfs_idestroy_fork(struct xfs_inode *, int);
570 void xfs_idata_realloc(struct xfs_inode *, int, int);
571 void xfs_iroot_realloc(struct xfs_inode *, int, int);
572 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
573 int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
574
575 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
576 void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
577 xfs_bmbt_irec_t *, int);
578 void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
579 void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
580 void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
581 void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
582 void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
583 void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
584 void xfs_iext_realloc_direct(xfs_ifork_t *, int);
585 void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
586 void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
587 void xfs_iext_destroy(xfs_ifork_t *);
588 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
589 xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
590 xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
591 void xfs_iext_irec_init(xfs_ifork_t *);
592 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
593 void xfs_iext_irec_remove(xfs_ifork_t *, int);
594 void xfs_iext_irec_compact(xfs_ifork_t *);
595 void xfs_iext_irec_compact_pages(xfs_ifork_t *);
596 void xfs_iext_irec_compact_full(xfs_ifork_t *);
597 void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
598
599 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
600
601 #if defined(DEBUG)
602 void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
603 #else
604 #define xfs_inobp_check(mp, bp)
605 #endif /* DEBUG */
606
607 extern struct kmem_zone *xfs_ifork_zone;
608 extern struct kmem_zone *xfs_inode_zone;
609 extern struct kmem_zone *xfs_ili_zone;
610
611 #endif /* __XFS_INODE_H__ */
612