dm mpath: check if scsi_dh module already loaded before trying to load
[zen-stable.git] / fs / xfs / xfs_inode.h
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1 /*
2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
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.
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.
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
18 #ifndef __XFS_INODE_H__
19 #define __XFS_INODE_H__
21 struct posix_acl;
22 struct xfs_dinode;
23 struct xfs_inode;
26 * Fork identifiers.
28 #define XFS_DATA_FORK 0
29 #define XFS_ATTR_FORK 1
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.
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.
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;
57 * File incore extent information, present for each of data & attr forks.
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;
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.
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 */
95 * This is the xfs in-core inode structure.
96 * Most of the on-disk inode is embedded in the i_d field.
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.
106 * Other state kept in the in-core inode is used for identification,
107 * locking, transactional updating, etc of the inode.
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.
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.
117 typedef struct xfs_ictimestamp {
118 __int32_t t_sec; /* timestamp seconds */
119 __int32_t t_nsec; /* timestamp nanoseconds */
120 } xfs_ictimestamp_t;
123 * NOTE: This structure must be kept identical to struct xfs_dinode
124 * in xfs_dinode.h except for the endianness annotations.
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;
156 * Flags for xfs_ichgtime().
158 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
159 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
162 * Per-fork incore inode flags.
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 */
170 * Fork handling.
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))
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) : \
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))
212 #ifdef __KERNEL__
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;
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 */
228 /* Inode location stuff */
229 xfs_ino_t i_ino; /* inode number (agno/agino)*/
230 struct xfs_imap i_imap; /* location for xfs_imap() */
232 /* Extent information. */
233 xfs_ifork_t *i_afp; /* attribute fork pointer */
234 xfs_ifork_t i_df; /* data fork */
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 char i_update_core; /* timestamps/size is dirty */
245 unsigned int i_delayed_blks; /* count of delay alloc blks */
247 xfs_icdinode_t i_d; /* most of ondisk inode */
249 /* VFS inode */
250 struct inode i_vnode; /* embedded VFS inode */
251 } xfs_inode_t;
253 /* Convert from vfs inode to xfs inode */
254 static inline struct xfs_inode *XFS_I(struct inode *inode)
256 return container_of(inode, struct xfs_inode, i_vnode);
259 /* convert from xfs inode to vfs inode */
260 static inline struct inode *VFS_I(struct xfs_inode *ip)
262 return &ip->i_vnode;
266 * For regular files we only update the on-disk filesize when actually
267 * writing data back to disk. Until then only the copy in the VFS inode
268 * is uptodate.
270 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
272 if (S_ISREG(ip->i_d.di_mode))
273 return i_size_read(VFS_I(ip));
274 return ip->i_d.di_size;
278 * i_flags helper functions
280 static inline void
281 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
283 ip->i_flags |= flags;
286 static inline void
287 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
289 spin_lock(&ip->i_flags_lock);
290 __xfs_iflags_set(ip, flags);
291 spin_unlock(&ip->i_flags_lock);
294 static inline void
295 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
297 spin_lock(&ip->i_flags_lock);
298 ip->i_flags &= ~flags;
299 spin_unlock(&ip->i_flags_lock);
302 static inline int
303 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
305 return (ip->i_flags & flags);
308 static inline int
309 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
311 int ret;
312 spin_lock(&ip->i_flags_lock);
313 ret = __xfs_iflags_test(ip, flags);
314 spin_unlock(&ip->i_flags_lock);
315 return ret;
318 static inline int
319 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
321 int ret;
323 spin_lock(&ip->i_flags_lock);
324 ret = ip->i_flags & flags;
325 if (ret)
326 ip->i_flags &= ~flags;
327 spin_unlock(&ip->i_flags_lock);
328 return ret;
331 static inline int
332 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
334 int ret;
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;
345 * Project quota id helpers (previously projid was 16bit only
346 * and using two 16bit values to hold new 32bit projid was chosen
347 * to retain compatibility with "old" filesystems).
349 static inline prid_t
350 xfs_get_projid(struct xfs_inode *ip)
352 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
355 static inline void
356 xfs_set_projid(struct xfs_inode *ip,
357 prid_t projid)
359 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
360 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
364 * In-core inode flags.
366 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
367 #define XFS_ISTALE (1 << 1) /* inode has been staled */
368 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
369 #define XFS_INEW (1 << 3) /* inode has just been allocated */
370 #define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
371 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
372 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
373 #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
374 #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
375 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
376 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
379 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
380 * inode lookup. Thi prevents unintended behaviour on the new inode from
381 * ocurring.
383 #define XFS_IRECLAIM_RESET_FLAGS \
384 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
385 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
386 XFS_IFILESTREAM);
389 * Synchronize processes attempting to flush the in-core inode back to disk.
392 extern void __xfs_iflock(struct xfs_inode *ip);
394 static inline int xfs_iflock_nowait(struct xfs_inode *ip)
396 return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
399 static inline void xfs_iflock(struct xfs_inode *ip)
401 if (!xfs_iflock_nowait(ip))
402 __xfs_iflock(ip);
405 static inline void xfs_ifunlock(struct xfs_inode *ip)
407 xfs_iflags_clear(ip, XFS_IFLOCK);
408 wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
411 static inline int xfs_isiflocked(struct xfs_inode *ip)
413 return xfs_iflags_test(ip, XFS_IFLOCK);
417 * Flags for inode locking.
418 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
419 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
421 #define XFS_IOLOCK_EXCL (1<<0)
422 #define XFS_IOLOCK_SHARED (1<<1)
423 #define XFS_ILOCK_EXCL (1<<2)
424 #define XFS_ILOCK_SHARED (1<<3)
425 #define XFS_IUNLOCK_NONOTIFY (1<<4)
427 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
428 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
430 #define XFS_LOCK_FLAGS \
431 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
432 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
433 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
434 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \
435 { XFS_IUNLOCK_NONOTIFY, "IUNLOCK_NONOTIFY" }
439 * Flags for lockdep annotations.
441 * XFS_LOCK_PARENT - for directory operations that require locking a
442 * parent directory inode and a child entry inode. The parent gets locked
443 * with this flag so it gets a lockdep subclass of 1 and the child entry
444 * lock will have a lockdep subclass of 0.
446 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
447 * inodes do not participate in the normal lock order, and thus have their
448 * own subclasses.
450 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
451 * with xfs_lock_inodes(). This flag is used as the starting subclass
452 * and each subsequent lock acquired will increment the subclass by one.
453 * So the first lock acquired will have a lockdep subclass of 4, the
454 * second lock will have a lockdep subclass of 5, and so on. It is
455 * the responsibility of the class builder to shift this to the correct
456 * portion of the lock_mode lockdep mask.
458 #define XFS_LOCK_PARENT 1
459 #define XFS_LOCK_RTBITMAP 2
460 #define XFS_LOCK_RTSUM 3
461 #define XFS_LOCK_INUMORDER 4
463 #define XFS_IOLOCK_SHIFT 16
464 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
466 #define XFS_ILOCK_SHIFT 24
467 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
468 #define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
469 #define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
471 #define XFS_IOLOCK_DEP_MASK 0x00ff0000
472 #define XFS_ILOCK_DEP_MASK 0xff000000
473 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
475 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
476 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
478 extern struct lock_class_key xfs_iolock_reclaimable;
481 * For multiple groups support: if S_ISGID bit is set in the parent
482 * directory, group of new file is set to that of the parent, and
483 * new subdirectory gets S_ISGID bit from parent.
485 #define XFS_INHERIT_GID(pip) \
486 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
487 ((pip)->i_d.di_mode & S_ISGID))
490 * xfs_iget.c prototypes.
492 int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
493 uint, uint, xfs_inode_t **);
494 void xfs_ilock(xfs_inode_t *, uint);
495 int xfs_ilock_nowait(xfs_inode_t *, uint);
496 void xfs_iunlock(xfs_inode_t *, uint);
497 void xfs_ilock_demote(xfs_inode_t *, uint);
498 int xfs_isilocked(xfs_inode_t *, uint);
499 uint xfs_ilock_map_shared(xfs_inode_t *);
500 void xfs_iunlock_map_shared(xfs_inode_t *, uint);
501 void xfs_inode_free(struct xfs_inode *ip);
504 * xfs_inode.c prototypes.
506 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
507 xfs_nlink_t, xfs_dev_t, prid_t, int,
508 struct xfs_buf **, boolean_t *, xfs_inode_t **);
510 uint xfs_ip2xflags(struct xfs_inode *);
511 uint xfs_dic2xflags(struct xfs_dinode *);
512 int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
513 struct xfs_bmap_free *);
514 int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
515 int, xfs_fsize_t);
516 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
518 void xfs_iext_realloc(xfs_inode_t *, int, int);
519 void xfs_iunpin_wait(xfs_inode_t *);
520 int xfs_iflush(xfs_inode_t *, uint);
521 void xfs_promote_inode(struct xfs_inode *);
522 void xfs_lock_inodes(xfs_inode_t **, int, uint);
523 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
525 void xfs_synchronize_times(xfs_inode_t *);
526 void xfs_mark_inode_dirty(xfs_inode_t *);
527 void xfs_mark_inode_dirty_sync(xfs_inode_t *);
529 #define IHOLD(ip) \
530 do { \
531 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
532 ihold(VFS_I(ip)); \
533 trace_xfs_ihold(ip, _THIS_IP_); \
534 } while (0)
536 #define IRELE(ip) \
537 do { \
538 trace_xfs_irele(ip, _THIS_IP_); \
539 iput(VFS_I(ip)); \
540 } while (0)
542 #endif /* __KERNEL__ */
545 * Flags for xfs_iget()
547 #define XFS_IGET_CREATE 0x1
548 #define XFS_IGET_UNTRUSTED 0x2
550 int xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
551 xfs_ino_t, struct xfs_dinode **,
552 struct xfs_buf **, int *, uint);
553 int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
554 struct xfs_inode *, struct xfs_dinode **,
555 struct xfs_buf **, uint);
556 int xfs_iread(struct xfs_mount *, struct xfs_trans *,
557 struct xfs_inode *, uint);
558 void xfs_dinode_to_disk(struct xfs_dinode *,
559 struct xfs_icdinode *);
560 void xfs_idestroy_fork(struct xfs_inode *, int);
561 void xfs_idata_realloc(struct xfs_inode *, int, int);
562 void xfs_iroot_realloc(struct xfs_inode *, int, int);
563 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
564 int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
566 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
567 void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
568 xfs_bmbt_irec_t *, int);
569 void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
570 void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
571 void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
572 void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
573 void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
574 void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
575 void xfs_iext_realloc_direct(xfs_ifork_t *, int);
576 void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
577 void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
578 void xfs_iext_destroy(xfs_ifork_t *);
579 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
580 xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
581 xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
582 void xfs_iext_irec_init(xfs_ifork_t *);
583 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
584 void xfs_iext_irec_remove(xfs_ifork_t *, int);
585 void xfs_iext_irec_compact(xfs_ifork_t *);
586 void xfs_iext_irec_compact_pages(xfs_ifork_t *);
587 void xfs_iext_irec_compact_full(xfs_ifork_t *);
588 void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
590 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
592 #if defined(DEBUG)
593 void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
594 #else
595 #define xfs_inobp_check(mp, bp)
596 #endif /* DEBUG */
598 extern struct kmem_zone *xfs_ifork_zone;
599 extern struct kmem_zone *xfs_inode_zone;
600 extern struct kmem_zone *xfs_ili_zone;
602 #endif /* __XFS_INODE_H__ */