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 xfs_dinode;
22 struct xfs_inode;
23
24 /*
25 * Fork identifiers.
26 */
27 #define XFS_DATA_FORK 0
28 #define XFS_ATTR_FORK 1
29
30 /*
31 * The following xfs_ext_irec_t struct introduces a second (top) level
32 * to the in-core extent allocation scheme. These structs are allocated
33 * in a contiguous block, creating an indirection array where each entry
34 * (irec) contains a pointer to a buffer of in-core extent records which
35 * it manages. Each extent buffer is 4k in size, since 4k is the system
36 * page size on Linux i386 and systems with larger page sizes don't seem
37 * to gain much, if anything, by using their native page size as the
38 * extent buffer size. Also, using 4k extent buffers everywhere provides
39 * a consistent interface for CXFS across different platforms.
40 *
41 * There is currently no limit on the number of irec's (extent lists)
42 * allowed, so heavily fragmented files may require an indirection array
43 * which spans multiple system pages of memory. The number of extents
44 * which would require this amount of contiguous memory is very large
45 * and should not cause problems in the foreseeable future. However,
46 * if the memory needed for the contiguous array ever becomes a problem,
47 * it is possible that a third level of indirection may be required.
48 */
49 typedef struct xfs_ext_irec {
50 xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */
51 xfs_extnum_t er_extoff; /* extent offset in file */
52 xfs_extnum_t er_extcount; /* number of extents in page/block */
53 } xfs_ext_irec_t;
54
55 /*
56 * File incore extent information, present for each of data & attr forks.
57 */
58 #define XFS_IEXT_BUFSZ 4096
59 #define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
60 #define XFS_INLINE_EXTS 2
61 #define XFS_INLINE_DATA 32
62 typedef struct xfs_ifork {
63 int if_bytes; /* bytes in if_u1 */
64 int if_real_bytes; /* bytes allocated in if_u1 */
65 struct xfs_btree_block *if_broot; /* file's incore btree root */
66 short if_broot_bytes; /* bytes allocated for root */
67 unsigned char if_flags; /* per-fork flags */
68 unsigned char if_ext_max; /* max # of extent records */
69 xfs_extnum_t if_lastex; /* last if_extents used */
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 */
89 struct 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 upto 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
118 typedef 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 endianess annotations.
126 */
127 typedef 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; /* owner's project id */
137 __uint8_t di_pad[8]; /* 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
209
210
211 #ifdef __KERNEL__
212
213 struct bhv_desc;
214 struct cred;
215 struct ktrace;
216 struct xfs_buf;
217 struct xfs_bmap_free;
218 struct xfs_bmbt_irec;
219 struct xfs_inode_log_item;
220 struct xfs_mount;
221 struct xfs_trans;
222 struct xfs_dquot;
223
224 #if defined(XFS_ILOCK_TRACE)
225 #define XFS_ILOCK_KTRACE_SIZE 32
226 extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
227 #else
228 #define xfs_ilock_trace(i,n,f,ra)
229 #endif
230
231 typedef struct dm_attrs_s {
232 __uint32_t da_dmevmask; /* DMIG event mask */
233 __uint16_t da_dmstate; /* DMIG state info */
234 __uint16_t da_pad; /* DMIG extra padding */
235 } dm_attrs_t;
236
237 typedef struct xfs_inode {
238 /* Inode linking and identification information. */
239 struct xfs_mount *i_mount; /* fs mount struct ptr */
240 struct xfs_dquot *i_udquot; /* user dquot */
241 struct xfs_dquot *i_gdquot; /* group dquot */
242
243 /* Inode location stuff */
244 xfs_ino_t i_ino; /* inode number (agno/agino)*/
245 struct xfs_imap i_imap; /* location for xfs_imap() */
246
247 /* Extent information. */
248 xfs_ifork_t *i_afp; /* attribute fork pointer */
249 xfs_ifork_t i_df; /* data fork */
250
251 /* Transaction and locking information. */
252 struct xfs_trans *i_transp; /* ptr to owning transaction*/
253 struct xfs_inode_log_item *i_itemp; /* logging information */
254 mrlock_t i_lock; /* inode lock */
255 mrlock_t i_iolock; /* inode IO lock */
256 struct completion i_flush; /* inode flush completion q */
257 atomic_t i_pincount; /* inode pin count */
258 wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */
259 spinlock_t i_flags_lock; /* inode i_flags lock */
260 /* Miscellaneous state. */
261 unsigned short i_flags; /* see defined flags below */
262 unsigned char i_update_core; /* timestamps/size is dirty */
263 unsigned char i_update_size; /* di_size field is dirty */
264 unsigned int i_delayed_blks; /* count of delay alloc blks */
265
266 xfs_icdinode_t i_d; /* most of ondisk inode */
267
268 xfs_fsize_t i_size; /* in-memory size */
269 xfs_fsize_t i_new_size; /* size when write completes */
270 atomic_t i_iocount; /* outstanding I/O count */
271
272 /* VFS inode */
273 struct inode i_vnode; /* embedded VFS inode */
274
275 /* Trace buffers per inode. */
276 #ifdef XFS_INODE_TRACE
277 struct ktrace *i_trace; /* general inode trace */
278 #endif
279 #ifdef XFS_BMAP_TRACE
280 struct ktrace *i_xtrace; /* inode extent list trace */
281 #endif
282 #ifdef XFS_BTREE_TRACE
283 struct ktrace *i_btrace; /* inode bmap btree trace */
284 #endif
285 #ifdef XFS_RW_TRACE
286 struct ktrace *i_rwtrace; /* inode read/write trace */
287 #endif
288 #ifdef XFS_ILOCK_TRACE
289 struct ktrace *i_lock_trace; /* inode lock/unlock trace */
290 #endif
291 #ifdef XFS_DIR2_TRACE
292 struct ktrace *i_dir_trace; /* inode directory trace */
293 #endif
294 } xfs_inode_t;
295
296 #define XFS_ISIZE(ip) (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
297 (ip)->i_size : (ip)->i_d.di_size;
298
299 /* Convert from vfs inode to xfs inode */
XFS_I(struct inode * inode)300 static inline struct xfs_inode *XFS_I(struct inode *inode)
301 {
302 return container_of(inode, struct xfs_inode, i_vnode);
303 }
304
305 /* convert from xfs inode to vfs inode */
VFS_I(struct xfs_inode * ip)306 static inline struct inode *VFS_I(struct xfs_inode *ip)
307 {
308 return &ip->i_vnode;
309 }
310
311 /*
312 * Get rid of a partially initialized inode.
313 *
314 * We have to go through destroy_inode to make sure allocations
315 * from init_inode_always like the security data are undone.
316 *
317 * We mark the inode bad so that it takes the short cut in
318 * the reclaim path instead of going through the flush path
319 * which doesn't make sense for an inode that has never seen the
320 * light of day.
321 */
xfs_destroy_inode(struct xfs_inode * ip)322 static inline void xfs_destroy_inode(struct xfs_inode *ip)
323 {
324 make_bad_inode(VFS_I(ip));
325 return destroy_inode(VFS_I(ip));
326 }
327
328 /*
329 * i_flags helper functions
330 */
331 static inline void
__xfs_iflags_set(xfs_inode_t * ip,unsigned short flags)332 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
333 {
334 ip->i_flags |= flags;
335 }
336
337 static inline void
xfs_iflags_set(xfs_inode_t * ip,unsigned short flags)338 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
339 {
340 spin_lock(&ip->i_flags_lock);
341 __xfs_iflags_set(ip, flags);
342 spin_unlock(&ip->i_flags_lock);
343 }
344
345 static inline void
xfs_iflags_clear(xfs_inode_t * ip,unsigned short flags)346 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
347 {
348 spin_lock(&ip->i_flags_lock);
349 ip->i_flags &= ~flags;
350 spin_unlock(&ip->i_flags_lock);
351 }
352
353 static inline int
__xfs_iflags_test(xfs_inode_t * ip,unsigned short flags)354 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
355 {
356 return (ip->i_flags & flags);
357 }
358
359 static inline int
xfs_iflags_test(xfs_inode_t * ip,unsigned short flags)360 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
361 {
362 int ret;
363 spin_lock(&ip->i_flags_lock);
364 ret = __xfs_iflags_test(ip, flags);
365 spin_unlock(&ip->i_flags_lock);
366 return ret;
367 }
368
369 static inline int
xfs_iflags_test_and_clear(xfs_inode_t * ip,unsigned short flags)370 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
371 {
372 int ret;
373
374 spin_lock(&ip->i_flags_lock);
375 ret = ip->i_flags & flags;
376 if (ret)
377 ip->i_flags &= ~flags;
378 spin_unlock(&ip->i_flags_lock);
379 return ret;
380 }
381
382 /*
383 * Manage the i_flush queue embedded in the inode. This completion
384 * queue synchronizes processes attempting to flush the in-core
385 * inode back to disk.
386 */
xfs_iflock(xfs_inode_t * ip)387 static inline void xfs_iflock(xfs_inode_t *ip)
388 {
389 wait_for_completion(&ip->i_flush);
390 }
391
xfs_iflock_nowait(xfs_inode_t * ip)392 static inline int xfs_iflock_nowait(xfs_inode_t *ip)
393 {
394 return try_wait_for_completion(&ip->i_flush);
395 }
396
xfs_ifunlock(xfs_inode_t * ip)397 static inline void xfs_ifunlock(xfs_inode_t *ip)
398 {
399 complete(&ip->i_flush);
400 }
401
402 /*
403 * In-core inode flags.
404 */
405 #define XFS_IRECLAIM 0x0001 /* we have started reclaiming this inode */
406 #define XFS_ISTALE 0x0002 /* inode has been staled */
407 #define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */
408 #define XFS_INEW 0x0008 /* inode has just been allocated */
409 #define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */
410 #define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */
411
412 /*
413 * Flags for inode locking.
414 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
415 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
416 */
417 #define XFS_IOLOCK_EXCL (1<<0)
418 #define XFS_IOLOCK_SHARED (1<<1)
419 #define XFS_ILOCK_EXCL (1<<2)
420 #define XFS_ILOCK_SHARED (1<<3)
421 #define XFS_IUNLOCK_NONOTIFY (1<<4)
422
423 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
424 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
425
426 /*
427 * Flags for lockdep annotations.
428 *
429 * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
430 * (ie directory operations that require locking a directory inode and
431 * an entry inode). The first inode gets locked with this flag so it
432 * gets a lockdep subclass of 1 and the second lock will have a lockdep
433 * subclass of 0.
434 *
435 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
436 * with xfs_lock_inodes(). This flag is used as the starting subclass
437 * and each subsequent lock acquired will increment the subclass by one.
438 * So the first lock acquired will have a lockdep subclass of 2, the
439 * second lock will have a lockdep subclass of 3, and so on. It is
440 * the responsibility of the class builder to shift this to the correct
441 * portion of the lock_mode lockdep mask.
442 */
443 #define XFS_LOCK_PARENT 1
444 #define XFS_LOCK_INUMORDER 2
445
446 #define XFS_IOLOCK_SHIFT 16
447 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
448
449 #define XFS_ILOCK_SHIFT 24
450 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
451
452 #define XFS_IOLOCK_DEP_MASK 0x00ff0000
453 #define XFS_ILOCK_DEP_MASK 0xff000000
454 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
455
456 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
457 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
458
459 /*
460 * Flags for xfs_iflush()
461 */
462 #define XFS_IFLUSH_DELWRI_ELSE_SYNC 1
463 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC 2
464 #define XFS_IFLUSH_SYNC 3
465 #define XFS_IFLUSH_ASYNC 4
466 #define XFS_IFLUSH_DELWRI 5
467 #define XFS_IFLUSH_ASYNC_NOBLOCK 6
468
469 /*
470 * Flags for xfs_itruncate_start().
471 */
472 #define XFS_ITRUNC_DEFINITE 0x1
473 #define XFS_ITRUNC_MAYBE 0x2
474
475 /*
476 * For multiple groups support: if S_ISGID bit is set in the parent
477 * directory, group of new file is set to that of the parent, and
478 * new subdirectory gets S_ISGID bit from parent.
479 */
480 #define XFS_INHERIT_GID(pip) \
481 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
482 ((pip)->i_d.di_mode & S_ISGID))
483
484 /*
485 * xfs_iget.c prototypes.
486 */
487 xfs_inode_t *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
488 struct xfs_trans *);
489 int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
490 uint, uint, xfs_inode_t **, xfs_daddr_t);
491 void xfs_iput(xfs_inode_t *, uint);
492 void xfs_iput_new(xfs_inode_t *, uint);
493 void xfs_ilock(xfs_inode_t *, uint);
494 int xfs_ilock_nowait(xfs_inode_t *, uint);
495 void xfs_iunlock(xfs_inode_t *, uint);
496 void xfs_ilock_demote(xfs_inode_t *, uint);
497 int xfs_isilocked(xfs_inode_t *, uint);
498 uint xfs_ilock_map_shared(xfs_inode_t *);
499 void xfs_iunlock_map_shared(xfs_inode_t *, uint);
500 void xfs_ireclaim(xfs_inode_t *);
501
502 /*
503 * xfs_inode.c prototypes.
504 */
505 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
506 xfs_nlink_t, xfs_dev_t, cred_t *, xfs_prid_t,
507 int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
508
509 uint xfs_ip2xflags(struct xfs_inode *);
510 uint xfs_dic2xflags(struct xfs_dinode *);
511 int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
512 struct xfs_bmap_free *);
513 int xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
514 int xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
515 xfs_fsize_t, int, int);
516 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
517
518 void xfs_iext_realloc(xfs_inode_t *, int, int);
519 void xfs_ipin(xfs_inode_t *);
520 void xfs_iunpin(xfs_inode_t *);
521 int xfs_iflush(xfs_inode_t *, uint);
522 void xfs_ichgtime(xfs_inode_t *, int);
523 xfs_fsize_t xfs_file_last_byte(xfs_inode_t *);
524 void xfs_lock_inodes(xfs_inode_t **, int, uint);
525 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
526
527 void xfs_synchronize_atime(xfs_inode_t *);
528 void xfs_mark_inode_dirty_sync(xfs_inode_t *);
529
530 #if defined(XFS_INODE_TRACE)
531
532 #define INODE_TRACE_SIZE 16 /* number of trace entries */
533 #define INODE_KTRACE_ENTRY 1
534 #define INODE_KTRACE_EXIT 2
535 #define INODE_KTRACE_HOLD 3
536 #define INODE_KTRACE_REF 4
537 #define INODE_KTRACE_RELE 5
538
539 extern void _xfs_itrace_entry(struct xfs_inode *, const char *, inst_t *);
540 extern void _xfs_itrace_exit(struct xfs_inode *, const char *, inst_t *);
541 extern void xfs_itrace_hold(struct xfs_inode *, char *, int, inst_t *);
542 extern void _xfs_itrace_ref(struct xfs_inode *, char *, int, inst_t *);
543 extern void xfs_itrace_rele(struct xfs_inode *, char *, int, inst_t *);
544 #define xfs_itrace_entry(ip) \
545 _xfs_itrace_entry(ip, __func__, (inst_t *)__return_address)
546 #define xfs_itrace_exit(ip) \
547 _xfs_itrace_exit(ip, __func__, (inst_t *)__return_address)
548 #define xfs_itrace_exit_tag(ip, tag) \
549 _xfs_itrace_exit(ip, tag, (inst_t *)__return_address)
550 #define xfs_itrace_ref(ip) \
551 _xfs_itrace_ref(ip, __FILE__, __LINE__, (inst_t *)__return_address)
552
553 #else
554 #define xfs_itrace_entry(a)
555 #define xfs_itrace_exit(a)
556 #define xfs_itrace_exit_tag(a, b)
557 #define xfs_itrace_hold(a, b, c, d)
558 #define xfs_itrace_ref(a)
559 #define xfs_itrace_rele(a, b, c, d)
560 #endif
561
562 #define IHOLD(ip) \
563 do { \
564 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
565 atomic_inc(&(VFS_I(ip)->i_count)); \
566 xfs_itrace_hold((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
567 } while (0)
568
569 #define IRELE(ip) \
570 do { \
571 xfs_itrace_rele((ip), __FILE__, __LINE__, (inst_t *)__return_address); \
572 iput(VFS_I(ip)); \
573 } while (0)
574
575 #endif /* __KERNEL__ */
576
577 /*
578 * Flags for xfs_iget()
579 */
580 #define XFS_IGET_CREATE 0x1
581 #define XFS_IGET_BULKSTAT 0x2
582
583 int xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
584 xfs_ino_t, struct xfs_dinode **,
585 struct xfs_buf **, int *, uint);
586 int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
587 struct xfs_inode *, struct xfs_dinode **,
588 struct xfs_buf **, uint);
589 int xfs_iread(struct xfs_mount *, struct xfs_trans *,
590 struct xfs_inode *, xfs_daddr_t, uint);
591 void xfs_dinode_from_disk(struct xfs_icdinode *,
592 struct xfs_dinode *);
593 void xfs_dinode_to_disk(struct xfs_dinode *,
594 struct xfs_icdinode *);
595 void xfs_idestroy_fork(struct xfs_inode *, int);
596 void xfs_idata_realloc(struct xfs_inode *, int, int);
597 void xfs_iroot_realloc(struct xfs_inode *, int, int);
598 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
599 int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
600
601 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
602 void xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
603 xfs_bmbt_irec_t *);
604 void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
605 void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
606 void xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
607 void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
608 void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
609 void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
610 void xfs_iext_realloc_direct(xfs_ifork_t *, int);
611 void xfs_iext_realloc_indirect(xfs_ifork_t *, int);
612 void xfs_iext_indirect_to_direct(xfs_ifork_t *);
613 void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
614 void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
615 void xfs_iext_destroy(xfs_ifork_t *);
616 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
617 xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
618 xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
619 void xfs_iext_irec_init(xfs_ifork_t *);
620 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
621 void xfs_iext_irec_remove(xfs_ifork_t *, int);
622 void xfs_iext_irec_compact(xfs_ifork_t *);
623 void xfs_iext_irec_compact_pages(xfs_ifork_t *);
624 void xfs_iext_irec_compact_full(xfs_ifork_t *);
625 void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
626
627 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
628
629 #ifdef DEBUG
630 void xfs_isize_check(struct xfs_mount *, struct xfs_inode *,
631 xfs_fsize_t);
632 #else /* DEBUG */
633 #define xfs_isize_check(mp, ip, isize)
634 #endif /* DEBUG */
635
636 #if defined(DEBUG)
637 void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
638 #else
639 #define xfs_inobp_check(mp, bp)
640 #endif /* DEBUG */
641
642 extern struct kmem_zone *xfs_ifork_zone;
643 extern struct kmem_zone *xfs_inode_zone;
644 extern struct kmem_zone *xfs_ili_zone;
645
646 #endif /* __XFS_INODE_H__ */
647