Linux 2.6.28-rc5
[cris-mirror.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 xfs_dinode;
22 struct xfs_dinode_core;
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 xfs_bmbt_block_t *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 xfs_extnum_t if_lastex; /* last if_extents used */
71 union {
72 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
73 xfs_ext_irec_t *if_ext_irec; /* irec map file exts */
74 char *if_data; /* inline file data */
75 } if_u1;
76 union {
77 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
78 /* very small file extents */
79 char if_inline_data[XFS_INLINE_DATA];
80 /* very small file data */
81 xfs_dev_t if_rdev; /* dev number if special */
82 uuid_t if_uuid; /* mount point value */
83 } if_u2;
84 } xfs_ifork_t;
87 * Flags for xfs_ichgtime().
89 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
90 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
93 * Per-fork incore inode flags.
95 #define XFS_IFINLINE 0x01 /* Inline data is read in */
96 #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
97 #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
98 #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
101 * Flags for xfs_itobp(), xfs_imap() and xfs_dilocate().
103 #define XFS_IMAP_LOOKUP 0x1
104 #define XFS_IMAP_BULKSTAT 0x2
106 #ifdef __KERNEL__
107 struct bhv_desc;
108 struct cred;
109 struct ktrace;
110 struct xfs_buf;
111 struct xfs_bmap_free;
112 struct xfs_bmbt_irec;
113 struct xfs_bmbt_block;
114 struct xfs_inode;
115 struct xfs_inode_log_item;
116 struct xfs_mount;
117 struct xfs_trans;
118 struct xfs_dquot;
120 #if defined(XFS_ILOCK_TRACE)
121 #define XFS_ILOCK_KTRACE_SIZE 32
122 extern ktrace_t *xfs_ilock_trace_buf;
123 extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
124 #else
125 #define xfs_ilock_trace(i,n,f,ra)
126 #endif
128 typedef struct dm_attrs_s {
129 __uint32_t da_dmevmask; /* DMIG event mask */
130 __uint16_t da_dmstate; /* DMIG state info */
131 __uint16_t da_pad; /* DMIG extra padding */
132 } dm_attrs_t;
135 * This is the xfs in-core inode structure.
136 * Most of the on-disk inode is embedded in the i_d field.
138 * The extent pointers/inline file space, however, are managed
139 * separately. The memory for this information is pointed to by
140 * the if_u1 unions depending on the type of the data.
141 * This is used to linearize the array of extents for fast in-core
142 * access. This is used until the file's number of extents
143 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
144 * are accessed through the buffer cache.
146 * Other state kept in the in-core inode is used for identification,
147 * locking, transactional updating, etc of the inode.
149 * Generally, we do not want to hold the i_rlock while holding the
150 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
152 * xfs_iptr_t contains all the inode fields upto and including the
153 * i_mnext and i_mprev fields, it is used as a marker in the inode
154 * chain off the mount structure by xfs_sync calls.
157 typedef struct xfs_ictimestamp {
158 __int32_t t_sec; /* timestamp seconds */
159 __int32_t t_nsec; /* timestamp nanoseconds */
160 } xfs_ictimestamp_t;
163 * NOTE: This structure must be kept identical to struct xfs_dinode_core
164 * in xfs_dinode.h except for the endianess annotations.
166 typedef struct xfs_icdinode {
167 __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
168 __uint16_t di_mode; /* mode and type of file */
169 __int8_t di_version; /* inode version */
170 __int8_t di_format; /* format of di_c data */
171 __uint16_t di_onlink; /* old number of links to file */
172 __uint32_t di_uid; /* owner's user id */
173 __uint32_t di_gid; /* owner's group id */
174 __uint32_t di_nlink; /* number of links to file */
175 __uint16_t di_projid; /* owner's project id */
176 __uint8_t di_pad[8]; /* unused, zeroed space */
177 __uint16_t di_flushiter; /* incremented on flush */
178 xfs_ictimestamp_t di_atime; /* time last accessed */
179 xfs_ictimestamp_t di_mtime; /* time last modified */
180 xfs_ictimestamp_t di_ctime; /* time created/inode modified */
181 xfs_fsize_t di_size; /* number of bytes in file */
182 xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
183 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
184 xfs_extnum_t di_nextents; /* number of extents in data fork */
185 xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
186 __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
187 __int8_t di_aformat; /* format of attr fork's data */
188 __uint32_t di_dmevmask; /* DMIG event mask */
189 __uint16_t di_dmstate; /* DMIG state info */
190 __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
191 __uint32_t di_gen; /* generation number */
192 } xfs_icdinode_t;
194 typedef struct {
195 struct xfs_inode *ip_mnext; /* next inode in mount list */
196 struct xfs_inode *ip_mprev; /* ptr to prev inode */
197 struct xfs_mount *ip_mount; /* fs mount struct ptr */
198 } xfs_iptr_t;
200 typedef struct xfs_inode {
201 /* Inode linking and identification information. */
202 struct xfs_inode *i_mnext; /* next inode in mount list */
203 struct xfs_inode *i_mprev; /* ptr to prev inode */
204 struct xfs_mount *i_mount; /* fs mount struct ptr */
205 struct list_head i_reclaim; /* reclaim list */
206 struct inode *i_vnode; /* vnode backpointer */
207 struct xfs_dquot *i_udquot; /* user dquot */
208 struct xfs_dquot *i_gdquot; /* group dquot */
210 /* Inode location stuff */
211 xfs_ino_t i_ino; /* inode number (agno/agino)*/
212 xfs_daddr_t i_blkno; /* blkno of inode buffer */
213 ushort i_len; /* len of inode buffer */
214 ushort i_boffset; /* off of inode in buffer */
216 /* Extent information. */
217 xfs_ifork_t *i_afp; /* attribute fork pointer */
218 xfs_ifork_t i_df; /* data fork */
220 /* Transaction and locking information. */
221 struct xfs_trans *i_transp; /* ptr to owning transaction*/
222 struct xfs_inode_log_item *i_itemp; /* logging information */
223 mrlock_t i_lock; /* inode lock */
224 mrlock_t i_iolock; /* inode IO lock */
225 struct completion i_flush; /* inode flush completion q */
226 atomic_t i_pincount; /* inode pin count */
227 wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
228 spinlock_t i_flags_lock; /* inode i_flags lock */
229 /* Miscellaneous state. */
230 unsigned short i_flags; /* see defined flags below */
231 unsigned char i_update_core; /* timestamps/size is dirty */
232 unsigned char i_update_size; /* di_size field is dirty */
233 unsigned int i_gen; /* generation count */
234 unsigned int i_delayed_blks; /* count of delay alloc blks */
236 xfs_icdinode_t i_d; /* most of ondisk inode */
238 xfs_fsize_t i_size; /* in-memory size */
239 xfs_fsize_t i_new_size; /* size when write completes */
240 atomic_t i_iocount; /* outstanding I/O count */
241 /* Trace buffers per inode. */
242 #ifdef XFS_INODE_TRACE
243 struct ktrace *i_trace; /* general inode trace */
244 #endif
245 #ifdef XFS_BMAP_TRACE
246 struct ktrace *i_xtrace; /* inode extent list trace */
247 #endif
248 #ifdef XFS_BMBT_TRACE
249 struct ktrace *i_btrace; /* inode bmap btree trace */
250 #endif
251 #ifdef XFS_RW_TRACE
252 struct ktrace *i_rwtrace; /* inode read/write trace */
253 #endif
254 #ifdef XFS_ILOCK_TRACE
255 struct ktrace *i_lock_trace; /* inode lock/unlock trace */
256 #endif
257 #ifdef XFS_DIR2_TRACE
258 struct ktrace *i_dir_trace; /* inode directory trace */
259 #endif
260 } xfs_inode_t;
262 #define XFS_ISIZE(ip) (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
263 (ip)->i_size : (ip)->i_d.di_size;
265 /* Convert from vfs inode to xfs inode */
266 static inline struct xfs_inode *XFS_I(struct inode *inode)
268 return (struct xfs_inode *)inode->i_private;
271 /* convert from xfs inode to vfs inode */
272 static inline struct inode *VFS_I(struct xfs_inode *ip)
274 return (struct inode *)ip->i_vnode;
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;
330 #endif /* __KERNEL__ */
334 * Fork handling.
337 #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0)
338 #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3))
340 #define XFS_IFORK_PTR(ip,w) \
341 ((w) == XFS_DATA_FORK ? \
342 &(ip)->i_df : \
343 (ip)->i_afp)
344 #define XFS_IFORK_DSIZE(ip) \
345 (XFS_IFORK_Q(ip) ? \
346 XFS_IFORK_BOFF(ip) : \
347 XFS_LITINO((ip)->i_mount))
348 #define XFS_IFORK_ASIZE(ip) \
349 (XFS_IFORK_Q(ip) ? \
350 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
352 #define XFS_IFORK_SIZE(ip,w) \
353 ((w) == XFS_DATA_FORK ? \
354 XFS_IFORK_DSIZE(ip) : \
355 XFS_IFORK_ASIZE(ip))
356 #define XFS_IFORK_FORMAT(ip,w) \
357 ((w) == XFS_DATA_FORK ? \
358 (ip)->i_d.di_format : \
359 (ip)->i_d.di_aformat)
360 #define XFS_IFORK_FMT_SET(ip,w,n) \
361 ((w) == XFS_DATA_FORK ? \
362 ((ip)->i_d.di_format = (n)) : \
363 ((ip)->i_d.di_aformat = (n)))
364 #define XFS_IFORK_NEXTENTS(ip,w) \
365 ((w) == XFS_DATA_FORK ? \
366 (ip)->i_d.di_nextents : \
367 (ip)->i_d.di_anextents)
368 #define XFS_IFORK_NEXT_SET(ip,w,n) \
369 ((w) == XFS_DATA_FORK ? \
370 ((ip)->i_d.di_nextents = (n)) : \
371 ((ip)->i_d.di_anextents = (n)))
373 #ifdef __KERNEL__
376 * In-core inode flags.
378 #define XFS_IGRIO 0x0001 /* inode used for guaranteed rate i/o */
379 #define XFS_IUIOSZ 0x0002 /* inode i/o sizes have been explicitly set */
380 #define XFS_IQUIESCE 0x0004 /* we have started quiescing for this inode */
381 #define XFS_IRECLAIM 0x0008 /* we have started reclaiming this inode */
382 #define XFS_ISTALE 0x0010 /* inode has been staled */
383 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
384 #define XFS_INEW 0x0040
385 #define XFS_IFILESTREAM 0x0080 /* inode is in a filestream directory */
386 #define XFS_IMODIFIED 0x0100 /* XFS inode state possibly differs */
387 /* to the Linux inode state. */
388 #define XFS_ITRUNCATED 0x0200 /* truncated down so flush-on-close */
391 * Flags for inode locking.
392 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
393 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
395 #define XFS_IOLOCK_EXCL (1<<0)
396 #define XFS_IOLOCK_SHARED (1<<1)
397 #define XFS_ILOCK_EXCL (1<<2)
398 #define XFS_ILOCK_SHARED (1<<3)
399 #define XFS_IUNLOCK_NONOTIFY (1<<4)
401 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
402 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
405 * Flags for lockdep annotations.
407 * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
408 * (ie directory operations that require locking a directory inode and
409 * an entry inode). The first inode gets locked with this flag so it
410 * gets a lockdep subclass of 1 and the second lock will have a lockdep
411 * subclass of 0.
413 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
414 * with xfs_lock_inodes(). This flag is used as the starting subclass
415 * and each subsequent lock acquired will increment the subclass by one.
416 * So the first lock acquired will have a lockdep subclass of 2, the
417 * second lock will have a lockdep subclass of 3, and so on. It is
418 * the responsibility of the class builder to shift this to the correct
419 * portion of the lock_mode lockdep mask.
421 #define XFS_LOCK_PARENT 1
422 #define XFS_LOCK_INUMORDER 2
424 #define XFS_IOLOCK_SHIFT 16
425 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
427 #define XFS_ILOCK_SHIFT 24
428 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
430 #define XFS_IOLOCK_DEP_MASK 0x00ff0000
431 #define XFS_ILOCK_DEP_MASK 0xff000000
432 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
434 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
435 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
438 * Flags for xfs_iflush()
440 #define XFS_IFLUSH_DELWRI_ELSE_SYNC 1
441 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC 2
442 #define XFS_IFLUSH_SYNC 3
443 #define XFS_IFLUSH_ASYNC 4
444 #define XFS_IFLUSH_DELWRI 5
445 #define XFS_IFLUSH_ASYNC_NOBLOCK 6
448 * Flags for xfs_itruncate_start().
450 #define XFS_ITRUNC_DEFINITE 0x1
451 #define XFS_ITRUNC_MAYBE 0x2
454 * For multiple groups support: if S_ISGID bit is set in the parent
455 * directory, group of new file is set to that of the parent, and
456 * new subdirectory gets S_ISGID bit from parent.
458 #define XFS_INHERIT_GID(pip) \
459 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
460 ((pip)->i_d.di_mode & S_ISGID))
463 * Flags for xfs_iget()
465 #define XFS_IGET_CREATE 0x1
466 #define XFS_IGET_BULKSTAT 0x2
469 * xfs_iget.c prototypes.
471 void xfs_ihash_init(struct xfs_mount *);
472 void xfs_ihash_free(struct xfs_mount *);
473 xfs_inode_t *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
474 struct xfs_trans *);
475 int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
476 uint, uint, xfs_inode_t **, xfs_daddr_t);
477 void xfs_iput(xfs_inode_t *, uint);
478 void xfs_iput_new(xfs_inode_t *, uint);
479 void xfs_ilock(xfs_inode_t *, uint);
480 int xfs_ilock_nowait(xfs_inode_t *, uint);
481 void xfs_iunlock(xfs_inode_t *, uint);
482 void xfs_ilock_demote(xfs_inode_t *, uint);
483 int xfs_isilocked(xfs_inode_t *, uint);
484 uint xfs_ilock_map_shared(xfs_inode_t *);
485 void xfs_iunlock_map_shared(xfs_inode_t *, uint);
486 void xfs_ireclaim(xfs_inode_t *);
487 int xfs_finish_reclaim(xfs_inode_t *, int, int);
488 int xfs_finish_reclaim_all(struct xfs_mount *, int);
491 * xfs_inode.c prototypes.
493 int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
494 xfs_inode_t *, struct xfs_dinode **, struct xfs_buf **,
495 xfs_daddr_t, uint, uint);
496 int xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
497 xfs_inode_t **, xfs_daddr_t, uint);
498 int xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
499 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
500 xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
501 int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
502 void xfs_dinode_from_disk(struct xfs_icdinode *,
503 struct xfs_dinode_core *);
504 void xfs_dinode_to_disk(struct xfs_dinode_core *,
505 struct xfs_icdinode *);
507 uint xfs_ip2xflags(struct xfs_inode *);
508 uint xfs_dic2xflags(struct xfs_dinode *);
509 int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
510 struct xfs_bmap_free *);
511 int xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
512 int xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
513 xfs_fsize_t, int, int);
514 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
516 void xfs_idestroy_fork(xfs_inode_t *, int);
517 void xfs_idestroy(xfs_inode_t *);
518 void xfs_idata_realloc(xfs_inode_t *, int, int);
519 void xfs_iextract(xfs_inode_t *);
520 void xfs_iext_realloc(xfs_inode_t *, int, int);
521 void xfs_iroot_realloc(xfs_inode_t *, int, int);
522 void xfs_ipin(xfs_inode_t *);
523 void xfs_iunpin(xfs_inode_t *);
524 int xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
525 int xfs_iflush(xfs_inode_t *, uint);
526 void xfs_iflush_all(struct xfs_mount *);
527 void xfs_ichgtime(xfs_inode_t *, int);
528 xfs_fsize_t xfs_file_last_byte(xfs_inode_t *);
529 void xfs_lock_inodes(xfs_inode_t **, int, uint);
530 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
532 void xfs_synchronize_atime(xfs_inode_t *);
533 void xfs_mark_inode_dirty_sync(xfs_inode_t *);
535 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
536 void xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
537 xfs_bmbt_irec_t *);
538 void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
539 void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
540 void xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
541 void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
542 void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
543 void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
544 void xfs_iext_realloc_direct(xfs_ifork_t *, int);
545 void xfs_iext_realloc_indirect(xfs_ifork_t *, int);
546 void xfs_iext_indirect_to_direct(xfs_ifork_t *);
547 void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
548 void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
549 void xfs_iext_destroy(xfs_ifork_t *);
550 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
551 xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
552 xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
553 void xfs_iext_irec_init(xfs_ifork_t *);
554 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
555 void xfs_iext_irec_remove(xfs_ifork_t *, int);
556 void xfs_iext_irec_compact(xfs_ifork_t *);
557 void xfs_iext_irec_compact_pages(xfs_ifork_t *);
558 void xfs_iext_irec_compact_full(xfs_ifork_t *);
559 void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
561 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
563 #ifdef DEBUG
564 void xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
565 #else /* DEBUG */
566 #define xfs_isize_check(mp, ip, isize)
567 #endif /* DEBUG */
569 #if defined(DEBUG)
570 void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
571 #else
572 #define xfs_inobp_check(mp, bp)
573 #endif /* DEBUG */
575 extern struct kmem_zone *xfs_ifork_zone;
576 extern struct kmem_zone *xfs_inode_zone;
577 extern struct kmem_zone *xfs_ili_zone;
580 * Manage the i_flush queue embedded in the inode. This completion
581 * queue synchronizes processes attempting to flush the in-core
582 * inode back to disk.
584 static inline void xfs_iflock(xfs_inode_t *ip)
586 wait_for_completion(&ip->i_flush);
589 static inline int xfs_iflock_nowait(xfs_inode_t *ip)
591 return try_wait_for_completion(&ip->i_flush);
594 static inline void xfs_ifunlock(xfs_inode_t *ip)
596 complete(&ip->i_flush);
599 #endif /* __KERNEL__ */
601 #endif /* __XFS_INODE_H__ */