summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_mount.h
blob: f5e32f43cd6298cf02da2ad5a628e50adf533add (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
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
/*
 * 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
 */
#ifndef __XFS_MOUNT_H__
#define	__XFS_MOUNT_H__


typedef struct xfs_trans_reservations {
	uint	tr_write;	/* extent alloc trans */
	uint	tr_itruncate;	/* truncate trans */
	uint	tr_rename;	/* rename trans */
	uint	tr_link;	/* link trans */
	uint	tr_remove;	/* unlink trans */
	uint	tr_symlink;	/* symlink trans */
	uint	tr_create;	/* create trans */
	uint	tr_mkdir;	/* mkdir trans */
	uint	tr_ifree;	/* inode free trans */
	uint	tr_ichange;	/* inode update trans */
	uint	tr_growdata;	/* fs data section grow trans */
	uint	tr_swrite;	/* sync write inode trans */
	uint	tr_addafork;	/* cvt inode to attributed trans */
	uint	tr_writeid;	/* write setuid/setgid file */
	uint	tr_attrinval;	/* attr fork buffer invalidation */
	uint	tr_attrset;	/* set/create an attribute */
	uint	tr_attrrm;	/* remove an attribute */
	uint	tr_clearagi;	/* clear bad agi unlinked ino bucket */
	uint	tr_growrtalloc;	/* grow realtime allocations */
	uint	tr_growrtzero;	/* grow realtime zeroing */
	uint	tr_growrtfree;	/* grow realtime freeing */
} xfs_trans_reservations_t;

#ifndef __KERNEL__
/*
 * Moved here from xfs_ag.h to avoid reordering header files
 */
#define XFS_DADDR_TO_AGNO(mp,d) \
	((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
#define XFS_DADDR_TO_AGBNO(mp,d) \
	((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
#else
struct cred;
struct log;
struct bhv_vfs;
struct bhv_vnode;
struct xfs_mount_args;
struct xfs_inode;
struct xfs_iocore;
struct xfs_bmbt_irec;
struct xfs_bmap_free;
struct xfs_extdelta;
struct xfs_swapext;
struct xfs_mru_cache;

extern struct bhv_vfsops xfs_vfsops;

#define	AIL_LOCK_T		lock_t
#define	AIL_LOCKINIT(x,y)	spinlock_init(x,y)
#define	AIL_LOCK_DESTROY(x)	spinlock_destroy(x)
#define	AIL_LOCK(mp,s)		s=mutex_spinlock(&(mp)->m_ail_lock)
#define	AIL_UNLOCK(mp,s)	mutex_spinunlock(&(mp)->m_ail_lock, s)


/*
 * Prototypes and functions for the Data Migration subsystem.
 */

typedef int	(*xfs_send_data_t)(int, struct bhv_vnode *,
			xfs_off_t, size_t, int, bhv_vrwlock_t *);
typedef int	(*xfs_send_mmap_t)(struct vm_area_struct *, uint);
typedef int	(*xfs_send_destroy_t)(struct bhv_vnode *, dm_right_t);
typedef int	(*xfs_send_namesp_t)(dm_eventtype_t, struct bhv_vfs *,
			struct bhv_vnode *,
			dm_right_t, struct bhv_vnode *, dm_right_t,
			char *, char *, mode_t, int, int);
typedef void	(*xfs_send_unmount_t)(struct bhv_vfs *, struct bhv_vnode *,
			dm_right_t, mode_t, int, int);

typedef struct xfs_dmops {
	xfs_send_data_t		xfs_send_data;
	xfs_send_mmap_t		xfs_send_mmap;
	xfs_send_destroy_t	xfs_send_destroy;
	xfs_send_namesp_t	xfs_send_namesp;
	xfs_send_unmount_t	xfs_send_unmount;
} xfs_dmops_t;

#define XFS_SEND_DATA(mp, ev,vp,off,len,fl,lock) \
	(*(mp)->m_dm_ops.xfs_send_data)(ev,vp,off,len,fl,lock)
#define XFS_SEND_MMAP(mp, vma,fl) \
	(*(mp)->m_dm_ops.xfs_send_mmap)(vma,fl)
#define XFS_SEND_DESTROY(mp, vp,right) \
	(*(mp)->m_dm_ops.xfs_send_destroy)(vp,right)
#define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
	(*(mp)->m_dm_ops.xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
#define XFS_SEND_PREUNMOUNT(mp, vfs,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
	(*(mp)->m_dm_ops.xfs_send_namesp)(DM_EVENT_PREUNMOUNT,vfs,b1,r1,b2,r2,n1,n2,mode,rval,fl)
#define XFS_SEND_UNMOUNT(mp, vfsp,vp,right,mode,rval,fl) \
	(*(mp)->m_dm_ops.xfs_send_unmount)(vfsp,vp,right,mode,rval,fl)


/*
 * Prototypes and functions for the Quota Management subsystem.
 */

struct xfs_dquot;
struct xfs_dqtrxops;
struct xfs_quotainfo;

typedef int	(*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
typedef int	(*xfs_qmmount_t)(struct xfs_mount *, uint, uint, int);
typedef int	(*xfs_qmunmount_t)(struct xfs_mount *);
typedef void	(*xfs_qmdone_t)(struct xfs_mount *);
typedef void	(*xfs_dqrele_t)(struct xfs_dquot *);
typedef int	(*xfs_dqattach_t)(struct xfs_inode *, uint);
typedef void	(*xfs_dqdetach_t)(struct xfs_inode *);
typedef int	(*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
typedef int	(*xfs_dqvopalloc_t)(struct xfs_mount *,
			struct xfs_inode *, uid_t, gid_t, prid_t, uint,
			struct xfs_dquot **, struct xfs_dquot **);
typedef void	(*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
			struct xfs_dquot *, struct xfs_dquot *);
typedef int	(*xfs_dqvoprename_t)(struct xfs_inode **);
typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
			struct xfs_trans *, struct xfs_inode *,
			struct xfs_dquot **, struct xfs_dquot *);
typedef int	(*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
			struct xfs_dquot *, struct xfs_dquot *, uint);

typedef struct xfs_qmops {
	xfs_qminit_t		xfs_qminit;
	xfs_qmdone_t		xfs_qmdone;
	xfs_qmmount_t		xfs_qmmount;
	xfs_qmunmount_t		xfs_qmunmount;
	xfs_dqrele_t		xfs_dqrele;
	xfs_dqattach_t		xfs_dqattach;
	xfs_dqdetach_t		xfs_dqdetach;
	xfs_dqpurgeall_t	xfs_dqpurgeall;
	xfs_dqvopalloc_t	xfs_dqvopalloc;
	xfs_dqvopcreate_t	xfs_dqvopcreate;
	xfs_dqvoprename_t	xfs_dqvoprename;
	xfs_dqvopchown_t	xfs_dqvopchown;
	xfs_dqvopchownresv_t	xfs_dqvopchownresv;
	struct xfs_dqtrxops	*xfs_dqtrxops;
} xfs_qmops_t;

#define XFS_QM_INIT(mp, mnt, fl) \
	(*(mp)->m_qm_ops.xfs_qminit)(mp, mnt, fl)
#define XFS_QM_MOUNT(mp, mnt, fl, mfsi_flags) \
	(*(mp)->m_qm_ops.xfs_qmmount)(mp, mnt, fl, mfsi_flags)
#define XFS_QM_UNMOUNT(mp) \
	(*(mp)->m_qm_ops.xfs_qmunmount)(mp)
#define XFS_QM_DONE(mp) \
	(*(mp)->m_qm_ops.xfs_qmdone)(mp)
#define XFS_QM_DQRELE(mp, dq) \
	(*(mp)->m_qm_ops.xfs_dqrele)(dq)
#define XFS_QM_DQATTACH(mp, ip, fl) \
	(*(mp)->m_qm_ops.xfs_dqattach)(ip, fl)
#define XFS_QM_DQDETACH(mp, ip) \
	(*(mp)->m_qm_ops.xfs_dqdetach)(ip)
#define XFS_QM_DQPURGEALL(mp, fl) \
	(*(mp)->m_qm_ops.xfs_dqpurgeall)(mp, fl)
#define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
	(*(mp)->m_qm_ops.xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
#define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
	(*(mp)->m_qm_ops.xfs_dqvopcreate)(tp, ip, dq1, dq2)
#define XFS_QM_DQVOPRENAME(mp, ip) \
	(*(mp)->m_qm_ops.xfs_dqvoprename)(ip)
#define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
	(*(mp)->m_qm_ops.xfs_dqvopchown)(tp, ip, dqp, dq)
#define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
	(*(mp)->m_qm_ops.xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)


/*
 * Prototypes and functions for I/O core modularization.
 */

typedef int		(*xfs_ioinit_t)(struct bhv_vfs *,
				struct xfs_mount_args *, int);
typedef int		(*xfs_bmapi_t)(struct xfs_trans *, void *,
				xfs_fileoff_t, xfs_filblks_t, int,
				xfs_fsblock_t *, xfs_extlen_t,
				struct xfs_bmbt_irec *, int *,
				struct xfs_bmap_free *, struct xfs_extdelta *);
typedef int		(*xfs_bunmapi_t)(struct xfs_trans *,
				void *, xfs_fileoff_t,
				xfs_filblks_t, int, xfs_extnum_t,
				xfs_fsblock_t *, struct xfs_bmap_free *,
				struct xfs_extdelta *, int *);
typedef int		(*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
typedef int		(*xfs_iomap_write_direct_t)(
				void *, xfs_off_t, size_t, int,
				struct xfs_bmbt_irec *, int *, int);
typedef int		(*xfs_iomap_write_delay_t)(
				void *, xfs_off_t, size_t, int,
				struct xfs_bmbt_irec *, int *);
typedef int		(*xfs_iomap_write_allocate_t)(
				void *, xfs_off_t, size_t,
				struct xfs_bmbt_irec *, int *);
typedef int		(*xfs_iomap_write_unwritten_t)(
				void *, xfs_off_t, size_t);
typedef uint		(*xfs_lck_map_shared_t)(void *);
typedef void		(*xfs_lock_t)(void *, uint);
typedef void		(*xfs_lock_demote_t)(void *, uint);
typedef int		(*xfs_lock_nowait_t)(void *, uint);
typedef void		(*xfs_unlk_t)(void *, unsigned int);
typedef xfs_fsize_t	(*xfs_size_t)(void *);
typedef xfs_fsize_t	(*xfs_iodone_t)(struct bhv_vfs *);
typedef int		(*xfs_swap_extents_t)(void *, void *,
				struct xfs_swapext*);

typedef struct xfs_ioops {
	xfs_ioinit_t			xfs_ioinit;
	xfs_bmapi_t			xfs_bmapi_func;
	xfs_bunmapi_t			xfs_bunmapi_func;
	xfs_bmap_eof_t			xfs_bmap_eof_func;
	xfs_iomap_write_direct_t	xfs_iomap_write_direct;
	xfs_iomap_write_delay_t		xfs_iomap_write_delay;
	xfs_iomap_write_allocate_t	xfs_iomap_write_allocate;
	xfs_iomap_write_unwritten_t	xfs_iomap_write_unwritten;
	xfs_lock_t			xfs_ilock;
	xfs_lck_map_shared_t		xfs_lck_map_shared;
	xfs_lock_demote_t		xfs_ilock_demote;
	xfs_lock_nowait_t		xfs_ilock_nowait;
	xfs_unlk_t			xfs_unlock;
	xfs_size_t			xfs_size_func;
	xfs_iodone_t			xfs_iodone;
	xfs_swap_extents_t		xfs_swap_extents_func;
} xfs_ioops_t;

#define XFS_IOINIT(vfsp, args, flags) \
	(*(mp)->m_io_ops.xfs_ioinit)(vfsp, args, flags)
#define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist,delta) \
	(*(mp)->m_io_ops.xfs_bmapi_func) \
		(trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist,delta)
#define XFS_BUNMAPI(mp, trans,io,bno,len,f,nexts,first,flist,delta,done) \
	(*(mp)->m_io_ops.xfs_bunmapi_func) \
		(trans,(io)->io_obj,bno,len,f,nexts,first,flist,delta,done)
#define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
	(*(mp)->m_io_ops.xfs_bmap_eof_func) \
		((io)->io_obj, endoff, whichfork, eof)
#define XFS_IOMAP_WRITE_DIRECT(mp, io, offset, count, flags, mval, nmap, found)\
	(*(mp)->m_io_ops.xfs_iomap_write_direct) \
		((io)->io_obj, offset, count, flags, mval, nmap, found)
#define XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, flags, mval, nmap) \
	(*(mp)->m_io_ops.xfs_iomap_write_delay) \
		((io)->io_obj, offset, count, flags, mval, nmap)
#define XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, mval, nmap) \
	(*(mp)->m_io_ops.xfs_iomap_write_allocate) \
		((io)->io_obj, offset, count, mval, nmap)
#define XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count) \
	(*(mp)->m_io_ops.xfs_iomap_write_unwritten) \
		((io)->io_obj, offset, count)
#define XFS_LCK_MAP_SHARED(mp, io) \
	(*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
#define XFS_ILOCK(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
#define XFS_ILOCK_NOWAIT(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
#define XFS_IUNLOCK(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
#define XFS_ILOCK_DEMOTE(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
#define XFS_SIZE(mp, io) \
	(*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
#define XFS_IODONE(vfsp) \
	(*(mp)->m_io_ops.xfs_iodone)(vfsp)
#define XFS_SWAP_EXTENTS(mp, io, tio, sxp) \
	(*(mp)->m_io_ops.xfs_swap_extents_func) \
		((io)->io_obj, (tio)->io_obj, sxp)

#ifdef HAVE_PERCPU_SB

/*
 * Valid per-cpu incore superblock counters. Note that if you add new counters,
 * you may need to define new counter disabled bit field descriptors as there
 * are more possible fields in the superblock that can fit in a bitfield on a
 * 32 bit platform. The XFS_SBS_* values for the current current counters just
 * fit.
 */
typedef struct xfs_icsb_cnts {
	uint64_t	icsb_fdblocks;
	uint64_t	icsb_ifree;
	uint64_t	icsb_icount;
	unsigned long	icsb_flags;
} xfs_icsb_cnts_t;

#define XFS_ICSB_FLAG_LOCK	(1 << 0)	/* counter lock bit */

#define XFS_ICSB_SB_LOCKED	(1 << 0)	/* sb already locked */
#define XFS_ICSB_LAZY_COUNT	(1 << 1)	/* accuracy not needed */

extern int	xfs_icsb_init_counters(struct xfs_mount *);
extern void	xfs_icsb_reinit_counters(struct xfs_mount *);
extern void	xfs_icsb_sync_counters_flags(struct xfs_mount *, int);

#else
#define xfs_icsb_init_counters(mp)	(0)
#define xfs_icsb_reinit_counters(mp)	do { } while (0)
#define xfs_icsb_sync_counters_flags(mp, flags)	do { } while (0)
#endif

typedef struct xfs_mount {
	bhv_desc_t		m_bhv;		/* vfs xfs behavior */
	xfs_tid_t		m_tid;		/* next unused tid for fs */
	AIL_LOCK_T		m_ail_lock;	/* fs AIL mutex */
	xfs_ail_entry_t		m_ail;		/* fs active log item list */
	uint			m_ail_gen;	/* fs AIL generation count */
	xfs_sb_t		m_sb;		/* copy of fs superblock */
	lock_t			m_sb_lock;	/* sb counter mutex */
	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
	char			*m_fsname;	/* filesystem name */
	int			m_fsname_len;	/* strlen of fs name */
	char			*m_rtname;	/* realtime device name */
	char			*m_logname;	/* external log device name */
	int			m_bsize;	/* fs logical block size */
	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
	lock_t			m_agirotor_lock;/* .. and lock protecting it */
	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
	struct xfs_inode	*m_inodes;	/* active inode list */
	struct list_head	m_del_inodes;	/* inodes to reclaim */
	mutex_t			m_ilock;	/* inode list mutex */
	uint			m_ireclaims;	/* count of calls to reclaim*/
	uint			m_readio_log;	/* min read size log bytes */
	uint			m_readio_blocks; /* min read size blocks */
	uint			m_writeio_log;	/* min write size log bytes */
	uint			m_writeio_blocks; /* min write size blocks */
	struct log		*m_log;		/* log specific stuff */
	int			m_logbufs;	/* number of log buffers */
	int			m_logbsize;	/* size of each log buffer */
	uint			m_rsumlevels;	/* rt summary levels */
	uint			m_rsumsize;	/* size of rt summary, bytes */
	struct xfs_inode	*m_rbmip;	/* pointer to bitmap inode */
	struct xfs_inode	*m_rsumip;	/* pointer to summary inode */
	struct xfs_inode	*m_rootip;	/* pointer to root directory */
	struct xfs_quotainfo	*m_quotainfo;	/* disk quota information */
	xfs_buftarg_t		*m_ddev_targp;	/* saves taking the address */
	xfs_buftarg_t		*m_logdev_targp;/* ptr to log device */
	xfs_buftarg_t		*m_rtdev_targp;	/* ptr to rt device */
	__uint8_t		m_dircook_elog;	/* log d-cookie entry bits */
	__uint8_t		m_blkbit_log;	/* blocklog + NBBY */
	__uint8_t		m_blkbb_log;	/* blocklog - BBSHIFT */
	__uint8_t		m_agno_log;	/* log #ag's */
	__uint8_t		m_agino_log;	/* #bits for agino in inum */
	__uint16_t		m_inode_cluster_size;/* min inode buf size */
	uint			m_blockmask;	/* sb_blocksize-1 */
	uint			m_blockwsize;	/* sb_blocksize in words */
	uint			m_blockwmask;	/* blockwsize-1 */
	uint			m_alloc_mxr[2];	/* XFS_ALLOC_BLOCK_MAXRECS */
	uint			m_alloc_mnr[2];	/* XFS_ALLOC_BLOCK_MINRECS */
	uint			m_bmap_dmxr[2];	/* XFS_BMAP_BLOCK_DMAXRECS */
	uint			m_bmap_dmnr[2];	/* XFS_BMAP_BLOCK_DMINRECS */
	uint			m_inobt_mxr[2];	/* XFS_INOBT_BLOCK_MAXRECS */
	uint			m_inobt_mnr[2];	/* XFS_INOBT_BLOCK_MINRECS */
	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
	uint			m_in_maxlevels;	/* XFS_IN_MAXLEVELS */
	struct xfs_perag	*m_perag;	/* per-ag accounting info */
	struct rw_semaphore	m_peraglock;	/* lock for m_perag (pointer) */
	sema_t			m_growlock;	/* growfs mutex */
	int			m_fixedfsid[2];	/* unchanged for life of FS */
	uint			m_dmevmask;	/* DMI events for this FS */
	__uint64_t		m_flags;	/* global mount flags */
	uint			m_attroffset;	/* inode attribute offset */
	uint			m_dir_node_ents; /* #entries in a dir danode */
	uint			m_attr_node_ents; /* #entries in attr danode */
	int			m_ialloc_inos;	/* inodes in inode allocation */
	int			m_ialloc_blks;	/* blocks in inode allocation */
	int			m_litino;	/* size of inode union area */
	int			m_inoalign_mask;/* mask sb_inoalignmt if used */
	uint			m_qflags;	/* quota status flags */
	xfs_trans_reservations_t m_reservations;/* precomputed res values */
	__uint64_t		m_maxicount;	/* maximum inode count */
	__uint64_t		m_maxioffset;	/* maximum inode offset */
	__uint64_t		m_resblks;	/* total reserved blocks */
	__uint64_t		m_resblks_avail;/* available reserved blocks */
#if XFS_BIG_INUMS
	xfs_ino_t		m_inoadd;	/* add value for ino64_offset */
#endif
	int			m_dalign;	/* stripe unit */
	int			m_swidth;	/* stripe width */
	int			m_sinoalign;	/* stripe unit inode alignment */
	int			m_attr_magicpct;/* 37% of the blocksize */
	int			m_dir_magicpct;	/* 37% of the dir blocksize */
	__uint8_t		m_mk_sharedro;	/* mark shared ro on unmount */
	__uint8_t		m_inode_quiesce;/* call quiesce on new inodes.
						   field governed by m_ilock */
	__uint8_t		m_sectbb_log;	/* sectlog - BBSHIFT */
	int			m_dirblksize;	/* directory block sz--bytes */
	int			m_dirblkfsbs;	/* directory block sz--fsbs */
	xfs_dablk_t		m_dirdatablk;	/* blockno of dir data v2 */
	xfs_dablk_t		m_dirleafblk;	/* blockno of dir non-data v2 */
	xfs_dablk_t		m_dirfreeblk;	/* blockno of dirfreeindex v2 */
	uint			m_chsize;	/* size of next field */
	struct xfs_chash	*m_chash;	/* fs private inode per-cluster
						 * hash table */
	struct xfs_dmops	m_dm_ops;	/* vector of DMI ops */
	struct xfs_qmops	m_qm_ops;	/* vector of XQM ops */
	struct xfs_ioops	m_io_ops;	/* vector of I/O ops */
	atomic_t		m_active_trans;	/* number trans frozen */
#ifdef HAVE_PERCPU_SB
	xfs_icsb_cnts_t		*m_sb_cnts;	/* per-cpu superblock counters */
	unsigned long		m_icsb_counters; /* disabled per-cpu counters */
	struct notifier_block	m_icsb_notifier; /* hotplug cpu notifier */
	struct mutex		m_icsb_mutex;	/* balancer sync lock */
#endif
	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
} xfs_mount_t;

/*
 * Flags for m_flags.
 */
#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
						   must be synchronous except
						   for space allocations */
#define XFS_MOUNT_INO64		(1ULL << 1)
			     /* (1ULL << 2)	-- currently unused */
#define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
#define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
						   operations, typically for
						   disk errors in metadata */
#define XFS_MOUNT_RETERR	(1ULL << 6)     /* return alignment errors to
						   user */
#define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
						   allocations */
#define XFS_MOUNT_ATTR2		(1ULL << 8)	/* allow use of attr2 format */
			     /*	(1ULL << 9)	-- currently unused */
#define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
#define XFS_MOUNT_SHARED	(1ULL << 11)	/* shared mount */
#define XFS_MOUNT_DFLT_IOSIZE	(1ULL << 12)	/* set default i/o size */
#define XFS_MOUNT_OSYNCISOSYNC	(1ULL << 13)	/* o_sync is REALLY o_sync */
						/* osyncisdsync is now default*/
#define XFS_MOUNT_32BITINODES	(1ULL << 14)	/* do not create inodes above
						 * 32 bits in size */
			     /* (1ULL << 15)	-- currently unused */
#define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
#define XFS_MOUNT_BARRIER	(1ULL << 17)
#define XFS_MOUNT_IDELETE	(1ULL << 18)	/* delete empty inode clusters*/
#define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
						 * allocation */
			     /*	(1ULL << 20)	-- currently unused */
#define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
#define XFS_MOUNT_COMPAT_IOSIZE	(1ULL << 22)	/* don't report large preferred
						 * I/O size in stat() */
#define XFS_MOUNT_NO_PERCPU_SB	(1ULL << 23)	/* don't use per-cpu superblock
						   counters */
#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
						   allocator */


/*
 * Default minimum read and write sizes.
 */
#define XFS_READIO_LOG_LARGE	16
#define XFS_WRITEIO_LOG_LARGE	16

/*
 * Max and min values for mount-option defined I/O
 * preallocation sizes.
 */
#define XFS_MAX_IO_LOG		30	/* 1G */
#define XFS_MIN_IO_LOG		PAGE_SHIFT

/*
 * Synchronous read and write sizes.  This should be
 * better for NFSv2 wsync filesystems.
 */
#define	XFS_WSYNC_READIO_LOG	15	/* 32K */
#define	XFS_WSYNC_WRITEIO_LOG	14	/* 16K */

/*
 * Allow large block sizes to be reported to userspace programs if the
 * "largeio" mount option is used. 
 *
 * If compatibility mode is specified, simply return the basic unit of caching
 * so that we don't get inefficient read/modify/write I/O from user apps.
 * Otherwise....
 *
 * If the underlying volume is a stripe, then return the stripe width in bytes
 * as the recommended I/O size. It is not a stripe and we've set a default
 * buffered I/O size, return that, otherwise return the compat default.
 */
static inline unsigned long
xfs_preferred_iosize(xfs_mount_t *mp)
{
	if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
		return PAGE_CACHE_SIZE;
	return (mp->m_swidth ?
		(mp->m_swidth << mp->m_sb.sb_blocklog) :
		((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
			(1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
			PAGE_CACHE_SIZE));
}

#define XFS_MAXIOFFSET(mp)	((mp)->m_maxioffset)

#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
#define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
#define xfs_force_shutdown(m,f)	\
	bhv_vfs_force_shutdown((XFS_MTOVFS(m)), f, __FILE__, __LINE__)

/*
 * Flags for xfs_mountfs
 */
#define XFS_MFSI_SECOND		0x01	/* Secondary mount -- skip stuff */
#define XFS_MFSI_CLIENT		0x02	/* Is a client -- skip lots of stuff */
/*	XFS_MFSI_RRINODES	*/
#define XFS_MFSI_NOUNLINK	0x08	/* Skip unlinked inode processing in */
					/* log recovery */
#define XFS_MFSI_NO_QUOTACHECK	0x10	/* Skip quotacheck processing */
/*	XFS_MFSI_CONVERT_SUNIT	*/
#define XFS_MFSI_QUIET		0x40	/* Be silent if mount errors found */

/*
 * Macros for getting from mount to vfs and back.
 */
#define	XFS_MTOVFS(mp)		xfs_mtovfs(mp)
static inline struct bhv_vfs *xfs_mtovfs(xfs_mount_t *mp)
{
	return bhvtovfs(&mp->m_bhv);
}

#define	XFS_BHVTOM(bdp)	xfs_bhvtom(bdp)
static inline xfs_mount_t *xfs_bhvtom(bhv_desc_t *bdp)
{
	return (xfs_mount_t *)BHV_PDATA(bdp);
}

#define XFS_VFSTOM(vfs) xfs_vfstom(vfs)
static inline xfs_mount_t *xfs_vfstom(bhv_vfs_t *vfs)
{
	return XFS_BHVTOM(bhv_lookup_range(VFS_BHVHEAD(vfs),
				VFS_POSITION_XFS, VFS_POSITION_XFS));
}

#define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)
static inline xfs_agnumber_t
xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
{
	xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
	do_div(ld, mp->m_sb.sb_agblocks);
	return (xfs_agnumber_t) ld;
}

#define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)
static inline xfs_agblock_t
xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
{
	xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
}

/*
 * perag get/put wrappers for eventual ref counting
 */
static inline xfs_perag_t *
xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino)
{
	return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)];
}

static inline void
xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag)
{
	/* nothing to see here, move along */
}

/*
 * Per-cpu superblock locking functions
 */
#ifdef HAVE_PERCPU_SB
STATIC_INLINE void
xfs_icsb_lock(xfs_mount_t *mp)
{
	mutex_lock(&mp->m_icsb_mutex);
}

STATIC_INLINE void
xfs_icsb_unlock(xfs_mount_t *mp)
{
	mutex_unlock(&mp->m_icsb_mutex);
}
#else
#define xfs_icsb_lock(mp)
#define xfs_icsb_unlock(mp)
#endif

/*
 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
 * xfs_growfs can specify a few fields which are more than int limit
 */
typedef struct xfs_mod_sb {
	xfs_sb_field_t	msb_field;	/* Field to modify, see below */
	int64_t		msb_delta;	/* Change to make to specified field */
} xfs_mod_sb_t;

#define	XFS_MOUNT_ILOCK(mp)	mutex_lock(&((mp)->m_ilock))
#define	XFS_MOUNT_IUNLOCK(mp)	mutex_unlock(&((mp)->m_ilock))
#define	XFS_SB_LOCK(mp)		mutex_spinlock(&(mp)->m_sb_lock)
#define	XFS_SB_UNLOCK(mp,s)	mutex_spinunlock(&(mp)->m_sb_lock,(s))

extern xfs_mount_t *xfs_mount_init(void);
extern void	xfs_mod_sb(xfs_trans_t *, __int64_t);
extern int	xfs_log_sbcount(xfs_mount_t *, uint);
extern void	xfs_mount_free(xfs_mount_t *mp, int remove_bhv);
extern int	xfs_mountfs(struct bhv_vfs *, xfs_mount_t *mp, int);
extern void	xfs_mountfs_check_barriers(xfs_mount_t *mp);

extern int	xfs_unmountfs(xfs_mount_t *, struct cred *);
extern void	xfs_unmountfs_close(xfs_mount_t *, struct cred *);
extern int	xfs_unmountfs_writesb(xfs_mount_t *);
extern int	xfs_unmount_flush(xfs_mount_t *, int);
extern int	xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
extern int	xfs_mod_incore_sb_unlocked(xfs_mount_t *, xfs_sb_field_t,
			int64_t, int);
extern int	xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
			uint, int);
extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
extern int	xfs_readsb(xfs_mount_t *, int);
extern void	xfs_freesb(xfs_mount_t *);
extern int	xfs_fs_writable(xfs_mount_t *);
extern void	xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);
extern int	xfs_syncsub(xfs_mount_t *, int, int *);
extern int	xfs_sync_inodes(xfs_mount_t *, int, int *);
extern xfs_agnumber_t	xfs_initialize_perag(struct bhv_vfs *, xfs_mount_t *,
						xfs_agnumber_t);
extern void	xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
extern void	xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);

extern struct xfs_dmops xfs_dmcore_stub;
extern struct xfs_qmops xfs_qmcore_stub;
extern struct xfs_ioops xfs_iocore_xfs;

extern int	xfs_init(void);
extern void	xfs_cleanup(void);

#endif	/* __KERNEL__ */

#endif	/* __XFS_MOUNT_H__ */