summaryrefslogtreecommitdiffstats
path: root/fs/xfs/linux-2.6/xfs_vnode.h
blob: f2bbb327c08147c9d5e5e6caa55f39a2891fcc44 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Portions Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef __XFS_VNODE_H__
#define __XFS_VNODE_H__

struct uio;
struct file;
struct vattr;
struct xfs_iomap;
struct attrlist_cursor_kern;


typedef xfs_ino_t vnumber_t;
typedef struct dentry vname_t;
typedef bhv_head_t vn_bhv_head_t;

/*
 * MP locking protocols:
 *	v_flag, v_vfsp				VN_LOCK/VN_UNLOCK
 */
typedef struct vnode {
	__u32		v_flag;			/* vnode flags (see below) */
	struct vfs	*v_vfsp;		/* ptr to containing VFS */
	vnumber_t	v_number;		/* in-core vnode number */
	vn_bhv_head_t	v_bh;			/* behavior head */
	spinlock_t	v_lock;			/* VN_LOCK/VN_UNLOCK */
	atomic_t	v_iocount;		/* outstanding I/O count */
#ifdef XFS_VNODE_TRACE
	struct ktrace	*v_trace;		/* trace header structure    */
#endif
	struct inode	v_inode;		/* Linux inode */
	/* inode MUST be last */
} vnode_t;

#define VN_ISLNK(vp)	S_ISLNK((vp)->v_inode.i_mode)
#define VN_ISREG(vp)	S_ISREG((vp)->v_inode.i_mode)
#define VN_ISDIR(vp)	S_ISDIR((vp)->v_inode.i_mode)
#define VN_ISCHR(vp)	S_ISCHR((vp)->v_inode.i_mode)
#define VN_ISBLK(vp)	S_ISBLK((vp)->v_inode.i_mode)

#define v_fbhv			v_bh.bh_first	       /* first behavior */
#define v_fops			v_bh.bh_first->bd_ops  /* first behavior ops */

#define VNODE_POSITION_BASE	BHV_POSITION_BASE	/* chain bottom */
#define VNODE_POSITION_TOP	BHV_POSITION_TOP	/* chain top */
#define VNODE_POSITION_INVALID	BHV_POSITION_INVALID	/* invalid pos. num */

typedef enum {
	VN_BHV_UNKNOWN,		/* not specified */
	VN_BHV_XFS,		/* xfs */
	VN_BHV_DM,		/* data migration */
	VN_BHV_QM,		/* quota manager */
	VN_BHV_IO,		/* IO path */
	VN_BHV_END		/* housekeeping end-of-range */
} vn_bhv_t;

#define VNODE_POSITION_XFS	(VNODE_POSITION_BASE)
#define VNODE_POSITION_DM	(VNODE_POSITION_BASE+10)
#define VNODE_POSITION_QM	(VNODE_POSITION_BASE+20)
#define VNODE_POSITION_IO	(VNODE_POSITION_BASE+30)

/*
 * Macros for dealing with the behavior descriptor inside of the vnode.
 */
#define BHV_TO_VNODE(bdp)	((vnode_t *)BHV_VOBJ(bdp))
#define BHV_TO_VNODE_NULL(bdp)	((vnode_t *)BHV_VOBJNULL(bdp))

#define VN_BHV_HEAD(vp)			((bhv_head_t *)(&((vp)->v_bh)))
#define vn_bhv_head_init(bhp,name)	bhv_head_init(bhp,name)
#define vn_bhv_remove(bhp,bdp)		bhv_remove(bhp,bdp)
#define vn_bhv_lookup(bhp,ops)		bhv_lookup(bhp,ops)
#define vn_bhv_lookup_unlocked(bhp,ops) bhv_lookup_unlocked(bhp,ops)

/*
 * Vnode to Linux inode mapping.
 */
#define LINVFS_GET_VP(inode)	((vnode_t *)list_entry(inode, vnode_t, v_inode))
#define LINVFS_GET_IP(vp)	(&(vp)->v_inode)

/*
 * Vnode flags.
 */
#define VMODIFIED	       0x8	/* XFS inode state possibly differs */
					/* to the Linux inode state.	*/

/*
 * Values for the VOP_RWLOCK and VOP_RWUNLOCK flags parameter.
 */
typedef enum vrwlock {
	VRWLOCK_NONE,
	VRWLOCK_READ,
	VRWLOCK_WRITE,
	VRWLOCK_WRITE_DIRECT,
	VRWLOCK_TRY_READ,
	VRWLOCK_TRY_WRITE
} vrwlock_t;

/*
 * Return values for VOP_INACTIVE.  A return value of
 * VN_INACTIVE_NOCACHE implies that the file system behavior
 * has disassociated its state and bhv_desc_t from the vnode.
 */
#define	VN_INACTIVE_CACHE	0
#define	VN_INACTIVE_NOCACHE	1

/*
 * Values for the cmd code given to VOP_VNODE_CHANGE.
 */
typedef enum vchange {
	VCHANGE_FLAGS_FRLOCKS		= 0,
	VCHANGE_FLAGS_ENF_LOCKING	= 1,
	VCHANGE_FLAGS_TRUNCATED		= 2,
	VCHANGE_FLAGS_PAGE_DIRTY	= 3,
	VCHANGE_FLAGS_IOEXCL_COUNT	= 4
} vchange_t;


typedef int	(*vop_open_t)(bhv_desc_t *, struct cred *);
typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct kiocb *,
				const struct iovec *, unsigned int,
				loff_t *, int, struct cred *);
typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct kiocb *,
				const struct iovec *, unsigned int,
				loff_t *, int, struct cred *);
typedef ssize_t (*vop_sendfile_t)(bhv_desc_t *, struct file *,
				loff_t *, int, size_t, read_actor_t,
				void *, struct cred *);
typedef int	(*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *,
				int, unsigned int, void __user *);
typedef int	(*vop_getattr_t)(bhv_desc_t *, struct vattr *, int,
				struct cred *);
typedef int	(*vop_setattr_t)(bhv_desc_t *, struct vattr *, int,
				struct cred *);
typedef int	(*vop_access_t)(bhv_desc_t *, int, struct cred *);
typedef int	(*vop_lookup_t)(bhv_desc_t *, vname_t *, vnode_t **,
				int, vnode_t *, struct cred *);
typedef int	(*vop_create_t)(bhv_desc_t *, vname_t *, struct vattr *,
				vnode_t **, struct cred *);
typedef int	(*vop_remove_t)(bhv_desc_t *, vname_t *, struct cred *);
typedef int	(*vop_link_t)(bhv_desc_t *, vnode_t *, vname_t *,
				struct cred *);
typedef int	(*vop_rename_t)(bhv_desc_t *, vname_t *, vnode_t *, vname_t *,
				struct cred *);
typedef int	(*vop_mkdir_t)(bhv_desc_t *, vname_t *, struct vattr *,
				vnode_t **, struct cred *);
typedef int	(*vop_rmdir_t)(bhv_desc_t *, vname_t *, struct cred *);
typedef int	(*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,
				int *);
typedef int	(*vop_symlink_t)(bhv_desc_t *, vname_t *, struct vattr *,
				char *, vnode_t **, struct cred *);
typedef int	(*vop_readlink_t)(bhv_desc_t *, struct uio *, int,
				struct cred *);
typedef int	(*vop_fsync_t)(bhv_desc_t *, int, struct cred *,
				xfs_off_t, xfs_off_t);
typedef int	(*vop_inactive_t)(bhv_desc_t *, struct cred *);
typedef int	(*vop_fid2_t)(bhv_desc_t *, struct fid *);
typedef int	(*vop_release_t)(bhv_desc_t *);
typedef int	(*vop_rwlock_t)(bhv_desc_t *, vrwlock_t);
typedef void	(*vop_rwunlock_t)(bhv_desc_t *, vrwlock_t);
typedef int	(*vop_bmap_t)(bhv_desc_t *, xfs_off_t, ssize_t, int,
				struct xfs_iomap *, int *);
typedef int	(*vop_reclaim_t)(bhv_desc_t *);
typedef int	(*vop_attr_get_t)(bhv_desc_t *, const char *, char *, int *,
				int, struct cred *);
typedef	int	(*vop_attr_set_t)(bhv_desc_t *, const char *, char *, int,
				int, struct cred *);
typedef	int	(*vop_attr_remove_t)(bhv_desc_t *, const char *,
				int, struct cred *);
typedef	int	(*vop_attr_list_t)(bhv_desc_t *, char *, int, int,
				struct attrlist_cursor_kern *, struct cred *);
typedef void	(*vop_link_removed_t)(bhv_desc_t *, vnode_t *, int);
typedef void	(*vop_vnode_change_t)(bhv_desc_t *, vchange_t, __psint_t);
typedef void	(*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
typedef void	(*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t, int);
typedef int	(*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, xfs_off_t,
				uint64_t, int);
typedef int	(*vop_iflush_t)(bhv_desc_t *, int);


typedef struct vnodeops {
	bhv_position_t  vn_position;    /* position within behavior chain */
	vop_open_t		vop_open;
	vop_read_t		vop_read;
	vop_write_t		vop_write;
	vop_sendfile_t		vop_sendfile;
	vop_ioctl_t		vop_ioctl;
	vop_getattr_t		vop_getattr;
	vop_setattr_t		vop_setattr;
	vop_access_t		vop_access;
	vop_lookup_t		vop_lookup;
	vop_create_t		vop_create;
	vop_remove_t		vop_remove;
	vop_link_t		vop_link;
	vop_rename_t		vop_rename;
	vop_mkdir_t		vop_mkdir;
	vop_rmdir_t		vop_rmdir;
	vop_readdir_t		vop_readdir;
	vop_symlink_t		vop_symlink;
	vop_readlink_t		vop_readlink;
	vop_fsync_t		vop_fsync;
	vop_inactive_t		vop_inactive;
	vop_fid2_t		vop_fid2;
	vop_rwlock_t		vop_rwlock;
	vop_rwunlock_t		vop_rwunlock;
	vop_bmap_t		vop_bmap;
	vop_reclaim_t		vop_reclaim;
	vop_attr_get_t		vop_attr_get;
	vop_attr_set_t		vop_attr_set;
	vop_attr_remove_t	vop_attr_remove;
	vop_attr_list_t		vop_attr_list;
	vop_link_removed_t	vop_link_removed;
	vop_vnode_change_t	vop_vnode_change;
	vop_ptossvp_t		vop_tosspages;
	vop_pflushinvalvp_t	vop_flushinval_pages;
	vop_pflushvp_t		vop_flush_pages;
	vop_release_t		vop_release;
	vop_iflush_t		vop_iflush;
} vnodeops_t;

/*
 * VOP's.
 */
#define _VOP_(op, vp)	(*((vnodeops_t *)(vp)->v_fops)->op)

#define VOP_READ(vp,file,iov,segs,offset,ioflags,cr,rv)			\
	rv = _VOP_(vop_read, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)
#define VOP_WRITE(vp,file,iov,segs,offset,ioflags,cr,rv)		\
	rv = _VOP_(vop_write, vp)((vp)->v_fbhv,file,iov,segs,offset,ioflags,cr)
#define VOP_SENDFILE(vp,f,off,ioflags,cnt,act,targ,cr,rv)		\
	rv = _VOP_(vop_sendfile, vp)((vp)->v_fbhv,f,off,ioflags,cnt,act,targ,cr)
#define VOP_BMAP(vp,of,sz,rw,b,n,rv)					\
	rv = _VOP_(vop_bmap, vp)((vp)->v_fbhv,of,sz,rw,b,n)
#define VOP_OPEN(vp, cr, rv)						\
	rv = _VOP_(vop_open, vp)((vp)->v_fbhv, cr)
#define VOP_GETATTR(vp, vap, f, cr, rv)					\
	rv = _VOP_(vop_getattr, vp)((vp)->v_fbhv, vap, f, cr)
#define	VOP_SETATTR(vp, vap, f, cr, rv)					\
	rv = _VOP_(vop_setattr, vp)((vp)->v_fbhv, vap, f, cr)
#define	VOP_ACCESS(vp, mode, cr, rv)					\
	rv = _VOP_(vop_access, vp)((vp)->v_fbhv, mode, cr)
#define	VOP_LOOKUP(vp,d,vpp,f,rdir,cr,rv)				\
	rv = _VOP_(vop_lookup, vp)((vp)->v_fbhv,d,vpp,f,rdir,cr)
#define VOP_CREATE(dvp,d,vap,vpp,cr,rv)					\
	rv = _VOP_(vop_create, dvp)((dvp)->v_fbhv,d,vap,vpp,cr)
#define VOP_REMOVE(dvp,d,cr,rv)						\
	rv = _VOP_(vop_remove, dvp)((dvp)->v_fbhv,d,cr)
#define	VOP_LINK(tdvp,fvp,d,cr,rv)					\
	rv = _VOP_(vop_link, tdvp)((tdvp)->v_fbhv,fvp,d,cr)
#define	VOP_RENAME(fvp,fnm,tdvp,tnm,cr,rv)				\
	rv = _VOP_(vop_rename, fvp)((fvp)->v_fbhv,fnm,tdvp,tnm,cr)
#define	VOP_MKDIR(dp,d,vap,vpp,cr,rv)					\
	rv = _VOP_(vop_mkdir, dp)((dp)->v_fbhv,d,vap,vpp,cr)
#define	VOP_RMDIR(dp,d,cr,rv)	 					\
	rv = _VOP_(vop_rmdir, dp)((dp)->v_fbhv,d,cr)
#define	VOP_READDIR(vp,uiop,cr,eofp,rv)					\
	rv = _VOP_(vop_readdir, vp)((vp)->v_fbhv,uiop,cr,eofp)
#define	VOP_SYMLINK(dvp,d,vap,tnm,vpp,cr,rv)				\
	rv = _VOP_(vop_symlink, dvp) ((dvp)->v_fbhv,d,vap,tnm,vpp,cr)
#define	VOP_READLINK(vp,uiop,fl,cr,rv)					\
	rv = _VOP_(vop_readlink, vp)((vp)->v_fbhv,uiop,fl,cr)
#define	VOP_FSYNC(vp,f,cr,b,e,rv)					\
	rv = _VOP_(vop_fsync, vp)((vp)->v_fbhv,f,cr,b,e)
#define VOP_INACTIVE(vp, cr, rv)					\
	rv = _VOP_(vop_inactive, vp)((vp)->v_fbhv, cr)
#define VOP_RELEASE(vp, rv)						\
	rv = _VOP_(vop_release, vp)((vp)->v_fbhv)
#define VOP_FID2(vp, fidp, rv)						\
	rv = _VOP_(vop_fid2, vp)((vp)->v_fbhv, fidp)
#define VOP_RWLOCK(vp,i)						\
	(void)_VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
#define VOP_RWLOCK_TRY(vp,i)						\
	_VOP_(vop_rwlock, vp)((vp)->v_fbhv, i)
#define VOP_RWUNLOCK(vp,i)						\
	(void)_VOP_(vop_rwunlock, vp)((vp)->v_fbhv, i)
#define VOP_FRLOCK(vp,c,fl,flags,offset,fr,rv)				\
	rv = _VOP_(vop_frlock, vp)((vp)->v_fbhv,c,fl,flags,offset,fr)
#define VOP_RECLAIM(vp, rv)						\
	rv = _VOP_(vop_reclaim, vp)((vp)->v_fbhv)
#define VOP_ATTR_GET(vp, name, val, vallenp, fl, cred, rv)		\
	rv = _VOP_(vop_attr_get, vp)((vp)->v_fbhv,name,val,vallenp,fl,cred)
#define	VOP_ATTR_SET(vp, name, val, vallen, fl, cred, rv)		\
	rv = _VOP_(vop_attr_set, vp)((vp)->v_fbhv,name,val,vallen,fl,cred)
#define	VOP_ATTR_REMOVE(vp, name, flags, cred, rv)			\
	rv = _VOP_(vop_attr_remove, vp)((vp)->v_fbhv,name,flags,cred)
#define	VOP_ATTR_LIST(vp, buf, buflen, fl, cursor, cred, rv)		\
	rv = _VOP_(vop_attr_list, vp)((vp)->v_fbhv,buf,buflen,fl,cursor,cred)
#define VOP_LINK_REMOVED(vp, dvp, linkzero)				\
	(void)_VOP_(vop_link_removed, vp)((vp)->v_fbhv, dvp, linkzero)
#define VOP_VNODE_CHANGE(vp, cmd, val)					\
	(void)_VOP_(vop_vnode_change, vp)((vp)->v_fbhv,cmd,val)
/*
 * These are page cache functions that now go thru VOPs.
 * 'last' parameter is unused and left in for IRIX compatibility
 */
#define VOP_TOSS_PAGES(vp, first, last, fiopt)				\
	_VOP_(vop_tosspages, vp)((vp)->v_fbhv,first, last, fiopt)
/*
 * 'last' parameter is unused and left in for IRIX compatibility
 */
#define VOP_FLUSHINVAL_PAGES(vp, first, last, fiopt)			\
	_VOP_(vop_flushinval_pages, vp)((vp)->v_fbhv,first,last,fiopt)
/*
 * 'last' parameter is unused and left in for IRIX compatibility
 */
#define VOP_FLUSH_PAGES(vp, first, last, flags, fiopt, rv)		\
	rv = _VOP_(vop_flush_pages, vp)((vp)->v_fbhv,first,last,flags,fiopt)
#define VOP_IOCTL(vp, inode, filp, fl, cmd, arg, rv)			\
	rv = _VOP_(vop_ioctl, vp)((vp)->v_fbhv,inode,filp,fl,cmd,arg)
#define VOP_IFLUSH(vp, flags, rv)					\
	rv = _VOP_(vop_iflush, vp)((vp)->v_fbhv, flags)

/*
 * Flags for read/write calls - same values as IRIX
 */
#define IO_ISAIO	0x00001		/* don't wait for completion */
#define IO_ISDIRECT	0x00004		/* bypass page cache */
#define IO_INVIS	0x00020		/* don't update inode timestamps */

/*
 * Flags for VOP_IFLUSH call
 */
#define FLUSH_SYNC		1	/* wait for flush to complete	*/
#define FLUSH_INODE		2	/* flush the inode itself	*/
#define FLUSH_LOG		4	/* force the last log entry for
					 * this inode out to disk	*/

/*
 * Flush/Invalidate options for VOP_TOSS_PAGES, VOP_FLUSHINVAL_PAGES and
 *	VOP_FLUSH_PAGES.
 */
#define FI_NONE			0	/* none */
#define FI_REMAPF		1	/* Do a remapf prior to the operation */
#define FI_REMAPF_LOCKED	2	/* Do a remapf prior to the operation.
					   Prevent VM access to the pages until
					   the operation completes. */

/*
 * Vnode attributes.  va_mask indicates those attributes the caller
 * wants to set or extract.
 */
typedef struct vattr {
	int		va_mask;	/* bit-mask of attributes present */
	mode_t		va_mode;	/* file access mode and type */
	xfs_nlink_t	va_nlink;	/* number of references to file */
	uid_t		va_uid;		/* owner user id */
	gid_t		va_gid;		/* owner group id */
	xfs_ino_t	va_nodeid;	/* file id */
	xfs_off_t	va_size;	/* file size in bytes */
	u_long		va_blocksize;	/* blocksize preferred for i/o */
	struct timespec	va_atime;	/* time of last access */
	struct timespec	va_mtime;	/* time of last modification */
	struct timespec	va_ctime;	/* time file changed */
	u_int		va_gen;		/* generation number of file */
	xfs_dev_t	va_rdev;	/* device the special file represents */
	__int64_t	va_nblocks;	/* number of blocks allocated */
	u_long		va_xflags;	/* random extended file flags */
	u_long		va_extsize;	/* file extent size */
	u_long		va_nextents;	/* number of extents in file */
	u_long		va_anextents;	/* number of attr extents in file */
	prid_t		va_projid;	/* project id */
} vattr_t;

/*
 * setattr or getattr attributes
 */
#define XFS_AT_TYPE		0x00000001
#define XFS_AT_MODE		0x00000002
#define XFS_AT_UID		0x00000004
#define XFS_AT_GID		0x00000008
#define XFS_AT_FSID		0x00000010
#define XFS_AT_NODEID		0x00000020
#define XFS_AT_NLINK		0x00000040
#define XFS_AT_SIZE		0x00000080
#define XFS_AT_ATIME		0x00000100
#define XFS_AT_MTIME		0x00000200
#define XFS_AT_CTIME		0x00000400
#define XFS_AT_RDEV		0x00000800
#define XFS_AT_BLKSIZE		0x00001000
#define XFS_AT_NBLOCKS		0x00002000
#define XFS_AT_VCODE		0x00004000
#define XFS_AT_MAC		0x00008000
#define XFS_AT_UPDATIME		0x00010000
#define XFS_AT_UPDMTIME		0x00020000
#define XFS_AT_UPDCTIME		0x00040000
#define XFS_AT_ACL		0x00080000
#define XFS_AT_CAP		0x00100000
#define XFS_AT_INF		0x00200000
#define XFS_AT_XFLAGS		0x00400000
#define XFS_AT_EXTSIZE		0x00800000
#define XFS_AT_NEXTENTS		0x01000000
#define XFS_AT_ANEXTENTS	0x02000000
#define XFS_AT_PROJID		0x04000000
#define XFS_AT_SIZE_NOPERM	0x08000000
#define XFS_AT_GENCOUNT		0x10000000

#define XFS_AT_ALL	(XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
		XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
		XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
		XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|XFS_AT_MAC|\
		XFS_AT_ACL|XFS_AT_CAP|XFS_AT_INF|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|\
		XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_PROJID|XFS_AT_GENCOUNT)

#define XFS_AT_STAT	(XFS_AT_TYPE|XFS_AT_MODE|XFS_AT_UID|XFS_AT_GID|\
		XFS_AT_FSID|XFS_AT_NODEID|XFS_AT_NLINK|XFS_AT_SIZE|\
		XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME|XFS_AT_RDEV|\
		XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_PROJID)

#define XFS_AT_TIMES	(XFS_AT_ATIME|XFS_AT_MTIME|XFS_AT_CTIME)

#define XFS_AT_UPDTIMES	(XFS_AT_UPDATIME|XFS_AT_UPDMTIME|XFS_AT_UPDCTIME)

#define XFS_AT_NOSET	(XFS_AT_NLINK|XFS_AT_RDEV|XFS_AT_FSID|XFS_AT_NODEID|\
		XFS_AT_TYPE|XFS_AT_BLKSIZE|XFS_AT_NBLOCKS|XFS_AT_VCODE|\
		XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS|XFS_AT_GENCOUNT)

/*
 *  Modes.
 */
#define VSUID	S_ISUID		/* set user id on execution */
#define VSGID	S_ISGID		/* set group id on execution */
#define VSVTX	S_ISVTX		/* save swapped text even after use */
#define VREAD	S_IRUSR		/* read, write, execute permissions */
#define VWRITE	S_IWUSR
#define VEXEC	S_IXUSR

#define MODEMASK S_IALLUGO	/* mode bits plus permission bits */

/*
 * Check whether mandatory file locking is enabled.
 */
#define MANDLOCK(vp, mode)	\
	(VN_ISREG(vp) && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)

extern void	vn_init(void);
extern vnode_t	*vn_initialize(struct inode *);

/*
 * vnode_map structures _must_ match vn_epoch and vnode structure sizes.
 */
typedef struct vnode_map {
	vfs_t		*v_vfsp;
	vnumber_t	v_number;		/* in-core vnode number */
	xfs_ino_t	v_ino;			/* inode #	*/
} vmap_t;

#define VMAP(vp, vmap)	{(vmap).v_vfsp	 = (vp)->v_vfsp,	\
			 (vmap).v_number = (vp)->v_number,	\
			 (vmap).v_ino	 = (vp)->v_inode.i_ino; }

extern int	vn_revalidate(struct vnode *);
extern void	vn_revalidate_core(struct vnode *, vattr_t *);

extern void	vn_iowait(struct vnode *vp);
extern void	vn_iowake(struct vnode *vp);

static inline int vn_count(struct vnode *vp)
{
	return atomic_read(&LINVFS_GET_IP(vp)->i_count);
}

/*
 * Vnode reference counting functions (and macros for compatibility).
 */
extern vnode_t	*vn_hold(struct vnode *);

#if defined(XFS_VNODE_TRACE)
#define VN_HOLD(vp)		\
	((void)vn_hold(vp),	\
	  vn_trace_hold(vp, __FILE__, __LINE__, (inst_t *)__return_address))
#define VN_RELE(vp)		\
	  (vn_trace_rele(vp, __FILE__, __LINE__, (inst_t *)__return_address), \
	   iput(LINVFS_GET_IP(vp)))
#else
#define VN_HOLD(vp)		((void)vn_hold(vp))
#define VN_RELE(vp)		(iput(LINVFS_GET_IP(vp)))
#endif

static inline struct vnode *vn_grab(struct vnode *vp)
{
	struct inode *inode = igrab(LINVFS_GET_IP(vp));
	return inode ? LINVFS_GET_VP(inode) : NULL;
}

/*
 * Vname handling macros.
 */
#define VNAME(dentry)		((char *) (dentry)->d_name.name)
#define VNAMELEN(dentry)	((dentry)->d_name.len)
#define VNAME_TO_VNODE(dentry)	(LINVFS_GET_VP((dentry)->d_inode))

/*
 * Vnode spinlock manipulation.
 */
#define VN_LOCK(vp)		mutex_spinlock(&(vp)->v_lock)
#define VN_UNLOCK(vp, s)	mutex_spinunlock(&(vp)->v_lock, s)
#define VN_FLAGSET(vp,b)	vn_flagset(vp,b)
#define VN_FLAGCLR(vp,b)	vn_flagclr(vp,b)

static __inline__ void vn_flagset(struct vnode *vp, uint flag)
{
	spin_lock(&vp->v_lock);
	vp->v_flag |= flag;
	spin_unlock(&vp->v_lock);
}

static __inline__ void vn_flagclr(struct vnode *vp, uint flag)
{
	spin_lock(&vp->v_lock);
	vp->v_flag &= ~flag;
	spin_unlock(&vp->v_lock);
}

/*
 * Dealing with bad inodes
 */
static inline void vn_mark_bad(struct vnode *vp)
{
	make_bad_inode(LINVFS_GET_IP(vp));
}

static inline int VN_BAD(struct vnode *vp)
{
	return is_bad_inode(LINVFS_GET_IP(vp));
}

/*
 * Some useful predicates.
 */
#define VN_MAPPED(vp)	mapping_mapped(LINVFS_GET_IP(vp)->i_mapping)
#define VN_CACHED(vp)	(LINVFS_GET_IP(vp)->i_mapping->nrpages)
#define VN_DIRTY(vp)	mapping_tagged(LINVFS_GET_IP(vp)->i_mapping, \
					PAGECACHE_TAG_DIRTY)
#define VMODIFY(vp)	VN_FLAGSET(vp, VMODIFIED)
#define VUNMODIFY(vp)	VN_FLAGCLR(vp, VMODIFIED)

/*
 * Flags to VOP_SETATTR/VOP_GETATTR.
 */
#define	ATTR_UTIME	0x01	/* non-default utime(2) request */
#define	ATTR_DMI	0x08	/* invocation from a DMI function */
#define	ATTR_LAZY	0x80	/* set/get attributes lazily */
#define	ATTR_NONBLOCK	0x100	/* return EAGAIN if operation would block */
#define ATTR_NOLOCK	0x200	/* Don't grab any conflicting locks */
#define ATTR_NOSIZETOK	0x400	/* Don't get the SIZE token */

/*
 * Flags to VOP_FSYNC and VOP_RECLAIM.
 */
#define FSYNC_NOWAIT	0	/* asynchronous flush */
#define FSYNC_WAIT	0x1	/* synchronous fsync or forced reclaim */
#define FSYNC_INVAL	0x2	/* flush and invalidate cached data */
#define FSYNC_DATA	0x4	/* synchronous fsync of data only */

/*
 * Tracking vnode activity.
 */
#if defined(XFS_VNODE_TRACE)

#define	VNODE_TRACE_SIZE	16		/* number of trace entries */
#define	VNODE_KTRACE_ENTRY	1
#define	VNODE_KTRACE_EXIT	2
#define	VNODE_KTRACE_HOLD	3
#define	VNODE_KTRACE_REF	4
#define	VNODE_KTRACE_RELE	5

extern void vn_trace_entry(struct vnode *, const char *, inst_t *);
extern void vn_trace_exit(struct vnode *, const char *, inst_t *);
extern void vn_trace_hold(struct vnode *, char *, int, inst_t *);
extern void vn_trace_ref(struct vnode *, char *, int, inst_t *);
extern void vn_trace_rele(struct vnode *, char *, int, inst_t *);

#define	VN_TRACE(vp)		\
	vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
#else
#define	vn_trace_entry(a,b,c)
#define	vn_trace_exit(a,b,c)
#define	vn_trace_hold(a,b,c,d)
#define	vn_trace_ref(a,b,c,d)
#define	vn_trace_rele(a,b,c,d)
#define	VN_TRACE(vp)
#endif

#endif	/* __XFS_VNODE_H__ */
OpenPOWER on IntegriCloud