summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_trans.h
blob: c6c0601abd7a6b17f7a40e99fe7052dcd679baf0 (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
/*
 * Copyright (c) 2000-2002,2005 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_TRANS_H__
#define	__XFS_TRANS_H__

struct xfs_log_item;

/*
 * This is the structure written in the log at the head of
 * every transaction. It identifies the type and id of the
 * transaction, and contains the number of items logged by
 * the transaction so we know how many to expect during recovery.
 *
 * Do not change the below structure without redoing the code in
 * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
 */
typedef struct xfs_trans_header {
	uint		th_magic;		/* magic number */
	uint		th_type;		/* transaction type */
	__int32_t	th_tid;			/* transaction id (unused) */
	uint		th_num_items;		/* num items logged by trans */
} xfs_trans_header_t;

#define	XFS_TRANS_HEADER_MAGIC	0x5452414e	/* TRAN */

/*
 * Log item types.
 */
#define	XFS_LI_EFI		0x1236
#define	XFS_LI_EFD		0x1237
#define	XFS_LI_IUNLINK		0x1238
#define	XFS_LI_INODE		0x123b	/* aligned ino chunks, var-size ibufs */
#define	XFS_LI_BUF		0x123c	/* v2 bufs, variable sized inode bufs */
#define	XFS_LI_DQUOT		0x123d
#define	XFS_LI_QUOTAOFF		0x123e

#define XFS_LI_TYPE_DESC \
	{ XFS_LI_EFI,		"XFS_LI_EFI" }, \
	{ XFS_LI_EFD,		"XFS_LI_EFD" }, \
	{ XFS_LI_IUNLINK,	"XFS_LI_IUNLINK" }, \
	{ XFS_LI_INODE,		"XFS_LI_INODE" }, \
	{ XFS_LI_BUF,		"XFS_LI_BUF" }, \
	{ XFS_LI_DQUOT,		"XFS_LI_DQUOT" }, \
	{ XFS_LI_QUOTAOFF,	"XFS_LI_QUOTAOFF" }

/*
 * Transaction types.  Used to distinguish types of buffers.
 */
#define XFS_TRANS_SETATTR_NOT_SIZE	1
#define XFS_TRANS_SETATTR_SIZE		2
#define XFS_TRANS_INACTIVE		3
#define XFS_TRANS_CREATE		4
#define XFS_TRANS_CREATE_TRUNC		5
#define XFS_TRANS_TRUNCATE_FILE		6
#define XFS_TRANS_REMOVE		7
#define XFS_TRANS_LINK			8
#define XFS_TRANS_RENAME		9
#define XFS_TRANS_MKDIR			10
#define XFS_TRANS_RMDIR			11
#define XFS_TRANS_SYMLINK		12
#define XFS_TRANS_SET_DMATTRS		13
#define XFS_TRANS_GROWFS		14
#define XFS_TRANS_STRAT_WRITE		15
#define XFS_TRANS_DIOSTRAT		16
/* 17 was XFS_TRANS_WRITE_SYNC */
#define	XFS_TRANS_WRITEID		18
#define	XFS_TRANS_ADDAFORK		19
#define	XFS_TRANS_ATTRINVAL		20
#define	XFS_TRANS_ATRUNCATE		21
#define	XFS_TRANS_ATTR_SET		22
#define	XFS_TRANS_ATTR_RM		23
#define	XFS_TRANS_ATTR_FLAG		24
#define	XFS_TRANS_CLEAR_AGI_BUCKET	25
#define XFS_TRANS_QM_SBCHANGE		26
/*
 * Dummy entries since we use the transaction type to index into the
 * trans_type[] in xlog_recover_print_trans_head()
 */
#define XFS_TRANS_DUMMY1		27
#define XFS_TRANS_DUMMY2		28
#define XFS_TRANS_QM_QUOTAOFF		29
#define XFS_TRANS_QM_DQALLOC		30
#define XFS_TRANS_QM_SETQLIM		31
#define XFS_TRANS_QM_DQCLUSTER		32
#define XFS_TRANS_QM_QINOCREATE		33
#define XFS_TRANS_QM_QUOTAOFF_END	34
#define XFS_TRANS_SB_UNIT		35
#define XFS_TRANS_FSYNC_TS		36
#define	XFS_TRANS_GROWFSRT_ALLOC	37
#define	XFS_TRANS_GROWFSRT_ZERO		38
#define	XFS_TRANS_GROWFSRT_FREE		39
#define	XFS_TRANS_SWAPEXT		40
#define	XFS_TRANS_SB_COUNT		41
#define	XFS_TRANS_CHECKPOINT		42
#define	XFS_TRANS_TYPE_MAX		42
/* new transaction types need to be reflected in xfs_logprint(8) */

#define XFS_TRANS_TYPES \
	{ XFS_TRANS_SETATTR_NOT_SIZE,	"SETATTR_NOT_SIZE" }, \
	{ XFS_TRANS_SETATTR_SIZE,	"SETATTR_SIZE" }, \
	{ XFS_TRANS_INACTIVE,		"INACTIVE" }, \
	{ XFS_TRANS_CREATE,		"CREATE" }, \
	{ XFS_TRANS_CREATE_TRUNC,	"CREATE_TRUNC" }, \
	{ XFS_TRANS_TRUNCATE_FILE,	"TRUNCATE_FILE" }, \
	{ XFS_TRANS_REMOVE,		"REMOVE" }, \
	{ XFS_TRANS_LINK,		"LINK" }, \
	{ XFS_TRANS_RENAME,		"RENAME" }, \
	{ XFS_TRANS_MKDIR,		"MKDIR" }, \
	{ XFS_TRANS_RMDIR,		"RMDIR" }, \
	{ XFS_TRANS_SYMLINK,		"SYMLINK" }, \
	{ XFS_TRANS_SET_DMATTRS,	"SET_DMATTRS" }, \
	{ XFS_TRANS_GROWFS,		"GROWFS" }, \
	{ XFS_TRANS_STRAT_WRITE,	"STRAT_WRITE" }, \
	{ XFS_TRANS_DIOSTRAT,		"DIOSTRAT" }, \
	{ XFS_TRANS_WRITEID,		"WRITEID" }, \
	{ XFS_TRANS_ADDAFORK,		"ADDAFORK" }, \
	{ XFS_TRANS_ATTRINVAL,		"ATTRINVAL" }, \
	{ XFS_TRANS_ATRUNCATE,		"ATRUNCATE" }, \
	{ XFS_TRANS_ATTR_SET,		"ATTR_SET" }, \
	{ XFS_TRANS_ATTR_RM,		"ATTR_RM" }, \
	{ XFS_TRANS_ATTR_FLAG,		"ATTR_FLAG" }, \
	{ XFS_TRANS_CLEAR_AGI_BUCKET,	"CLEAR_AGI_BUCKET" }, \
	{ XFS_TRANS_QM_SBCHANGE,	"QM_SBCHANGE" }, \
	{ XFS_TRANS_QM_QUOTAOFF,	"QM_QUOTAOFF" }, \
	{ XFS_TRANS_QM_DQALLOC,		"QM_DQALLOC" }, \
	{ XFS_TRANS_QM_SETQLIM,		"QM_SETQLIM" }, \
	{ XFS_TRANS_QM_DQCLUSTER,	"QM_DQCLUSTER" }, \
	{ XFS_TRANS_QM_QINOCREATE,	"QM_QINOCREATE" }, \
	{ XFS_TRANS_QM_QUOTAOFF_END,	"QM_QOFF_END" }, \
	{ XFS_TRANS_SB_UNIT,		"SB_UNIT" }, \
	{ XFS_TRANS_FSYNC_TS,		"FSYNC_TS" }, \
	{ XFS_TRANS_GROWFSRT_ALLOC,	"GROWFSRT_ALLOC" }, \
	{ XFS_TRANS_GROWFSRT_ZERO,	"GROWFSRT_ZERO" }, \
	{ XFS_TRANS_GROWFSRT_FREE,	"GROWFSRT_FREE" }, \
	{ XFS_TRANS_SWAPEXT,		"SWAPEXT" }, \
	{ XFS_TRANS_SB_COUNT,		"SB_COUNT" }, \
	{ XFS_TRANS_CHECKPOINT,		"CHECKPOINT" }, \
	{ XFS_TRANS_DUMMY1,		"DUMMY1" }, \
	{ XFS_TRANS_DUMMY2,		"DUMMY2" }, \
	{ XLOG_UNMOUNT_REC_TYPE,	"UNMOUNT" }

/*
 * This structure is used to track log items associated with
 * a transaction.  It points to the log item and keeps some
 * flags to track the state of the log item.  It also tracks
 * the amount of space needed to log the item it describes
 * once we get to commit processing (see xfs_trans_commit()).
 */
struct xfs_log_item_desc {
	struct xfs_log_item	*lid_item;
	struct list_head	lid_trans;
	unsigned char		lid_flags;
};

#define XFS_LID_DIRTY		0x1

#define	XFS_TRANS_MAGIC		0x5452414E	/* 'TRAN' */
/*
 * Values for t_flags.
 */
#define	XFS_TRANS_DIRTY		0x01	/* something needs to be logged */
#define	XFS_TRANS_SB_DIRTY	0x02	/* superblock is modified */
#define	XFS_TRANS_PERM_LOG_RES	0x04	/* xact took a permanent log res */
#define	XFS_TRANS_SYNC		0x08	/* make commit synchronous */
#define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
#define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
#define XFS_TRANS_FREEZE_PROT	0x40	/* Transaction has elevated writer
					   count in superblock */

/*
 * Values for call flags parameter.
 */
#define	XFS_TRANS_RELEASE_LOG_RES	0x4
#define	XFS_TRANS_ABORT			0x8

/*
 * Field values for xfs_trans_mod_sb.
 */
#define	XFS_TRANS_SB_ICOUNT		0x00000001
#define	XFS_TRANS_SB_IFREE		0x00000002
#define	XFS_TRANS_SB_FDBLOCKS		0x00000004
#define	XFS_TRANS_SB_RES_FDBLOCKS	0x00000008
#define	XFS_TRANS_SB_FREXTENTS		0x00000010
#define	XFS_TRANS_SB_RES_FREXTENTS	0x00000020
#define	XFS_TRANS_SB_DBLOCKS		0x00000040
#define	XFS_TRANS_SB_AGCOUNT		0x00000080
#define	XFS_TRANS_SB_IMAXPCT		0x00000100
#define	XFS_TRANS_SB_REXTSIZE		0x00000200
#define	XFS_TRANS_SB_RBMBLOCKS		0x00000400
#define	XFS_TRANS_SB_RBLOCKS		0x00000800
#define	XFS_TRANS_SB_REXTENTS		0x00001000
#define	XFS_TRANS_SB_REXTSLOG		0x00002000


/*
 * Per-extent log reservation for the allocation btree changes
 * involved in freeing or allocating an extent.
 * 2 trees * (2 blocks/level * max depth - 1) * block size
 */
#define	XFS_ALLOCFREE_LOG_RES(mp,nx) \
	((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
#define	XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
	((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))

/*
 * Per-directory log reservation for any directory change.
 * dir blocks: (1 btree block per level + data block + free block) * dblock size
 * bmap btree: (levels + 2) * max depth * block size
 * v2 directory blocks can be fragmented below the dirblksize down to the fsb
 * size, so account for that in the DAENTER macros.
 */
#define	XFS_DIROP_LOG_RES(mp)	\
	(XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
	 (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
#define	XFS_DIROP_LOG_COUNT(mp)	\
	(XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
	 XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)


#define	XFS_WRITE_LOG_RES(mp)	((mp)->m_reservations.tr_write)
#define	XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
#define	XFS_RENAME_LOG_RES(mp)	((mp)->m_reservations.tr_rename)
#define	XFS_LINK_LOG_RES(mp)	((mp)->m_reservations.tr_link)
#define	XFS_REMOVE_LOG_RES(mp)	((mp)->m_reservations.tr_remove)
#define	XFS_SYMLINK_LOG_RES(mp)	((mp)->m_reservations.tr_symlink)
#define	XFS_CREATE_LOG_RES(mp)	((mp)->m_reservations.tr_create)
#define	XFS_MKDIR_LOG_RES(mp)	((mp)->m_reservations.tr_mkdir)
#define	XFS_IFREE_LOG_RES(mp)	((mp)->m_reservations.tr_ifree)
#define	XFS_ICHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_ichange)
#define	XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
#define	XFS_GROWRTALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_growrtalloc)
#define	XFS_GROWRTZERO_LOG_RES(mp)	((mp)->m_reservations.tr_growrtzero)
#define	XFS_GROWRTFREE_LOG_RES(mp)	((mp)->m_reservations.tr_growrtfree)
#define	XFS_SWRITE_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)
/*
 * Logging the inode timestamps on an fsync -- same as SWRITE
 * as long as SWRITE logs the entire inode core
 */
#define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
#define	XFS_WRITEID_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)
#define	XFS_ADDAFORK_LOG_RES(mp)	((mp)->m_reservations.tr_addafork)
#define	XFS_ATTRINVAL_LOG_RES(mp)	((mp)->m_reservations.tr_attrinval)
#define	XFS_ATTRSET_LOG_RES(mp, ext)	\
	((mp)->m_reservations.tr_attrset + \
	 (ext * (mp)->m_sb.sb_sectsize) + \
	 (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
	 (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
#define	XFS_ATTRRM_LOG_RES(mp)	((mp)->m_reservations.tr_attrrm)
#define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)


/*
 * Various log count values.
 */
#define	XFS_DEFAULT_LOG_COUNT		1
#define	XFS_DEFAULT_PERM_LOG_COUNT	2
#define	XFS_ITRUNCATE_LOG_COUNT		2
#define XFS_INACTIVE_LOG_COUNT		2
#define	XFS_CREATE_LOG_COUNT		2
#define	XFS_MKDIR_LOG_COUNT		3
#define	XFS_SYMLINK_LOG_COUNT		3
#define	XFS_REMOVE_LOG_COUNT		2
#define	XFS_LINK_LOG_COUNT		2
#define	XFS_RENAME_LOG_COUNT		2
#define	XFS_WRITE_LOG_COUNT		2
#define	XFS_ADDAFORK_LOG_COUNT		2
#define	XFS_ATTRINVAL_LOG_COUNT		1
#define	XFS_ATTRSET_LOG_COUNT		3
#define	XFS_ATTRRM_LOG_COUNT		3

/*
 * Here we centralize the specification of XFS meta-data buffer
 * reference count values.  This determine how hard the buffer
 * cache tries to hold onto the buffer.
 */
#define	XFS_AGF_REF		4
#define	XFS_AGI_REF		4
#define	XFS_AGFL_REF		3
#define	XFS_INO_BTREE_REF	3
#define	XFS_ALLOC_BTREE_REF	2
#define	XFS_BMAP_BTREE_REF	2
#define	XFS_DIR_BTREE_REF	2
#define	XFS_INO_REF		2
#define	XFS_ATTR_BTREE_REF	1
#define	XFS_DQUOT_REF		1

#ifdef __KERNEL__

struct xfs_buf;
struct xfs_buftarg;
struct xfs_efd_log_item;
struct xfs_efi_log_item;
struct xfs_inode;
struct xfs_item_ops;
struct xfs_log_iovec;
struct xfs_log_item_desc;
struct xfs_mount;
struct xfs_trans;
struct xfs_dquot_acct;
struct xfs_busy_extent;

typedef struct xfs_log_item {
	struct list_head		li_ail;		/* AIL pointers */
	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
	struct xfs_log_item_desc	*li_desc;	/* ptr to current desc*/
	struct xfs_mount		*li_mountp;	/* ptr to fs mount */
	struct xfs_ail			*li_ailp;	/* ptr to AIL */
	uint				li_type;	/* item type */
	uint				li_flags;	/* misc flags */
	struct xfs_log_item		*li_bio_list;	/* buffer item list */
	void				(*li_cb)(struct xfs_buf *,
						 struct xfs_log_item *);
							/* buffer item iodone */
							/* callback func */
	const struct xfs_item_ops	*li_ops;	/* function list */

	/* delayed logging */
	struct list_head		li_cil;		/* CIL pointers */
	struct xfs_log_vec		*li_lv;		/* active log vector */
	xfs_lsn_t			li_seq;		/* CIL commit seq */
} xfs_log_item_t;

#define	XFS_LI_IN_AIL	0x1
#define XFS_LI_ABORTED	0x2

#define XFS_LI_FLAGS \
	{ XFS_LI_IN_AIL,	"IN_AIL" }, \
	{ XFS_LI_ABORTED,	"ABORTED" }

struct xfs_item_ops {
	uint (*iop_size)(xfs_log_item_t *);
	void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
	void (*iop_pin)(xfs_log_item_t *);
	void (*iop_unpin)(xfs_log_item_t *, int remove);
	uint (*iop_push)(struct xfs_log_item *, struct list_head *);
	void (*iop_unlock)(xfs_log_item_t *);
	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
	void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
};

#define IOP_SIZE(ip)		(*(ip)->li_ops->iop_size)(ip)
#define IOP_FORMAT(ip,vp)	(*(ip)->li_ops->iop_format)(ip, vp)
#define IOP_PIN(ip)		(*(ip)->li_ops->iop_pin)(ip)
#define IOP_UNPIN(ip, remove)	(*(ip)->li_ops->iop_unpin)(ip, remove)
#define IOP_PUSH(ip, list)	(*(ip)->li_ops->iop_push)(ip, list)
#define IOP_UNLOCK(ip)		(*(ip)->li_ops->iop_unlock)(ip)
#define IOP_COMMITTED(ip, lsn)	(*(ip)->li_ops->iop_committed)(ip, lsn)
#define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)

/*
 * Return values for the IOP_PUSH() routines.
 */
#define XFS_ITEM_SUCCESS	0
#define XFS_ITEM_PINNED		1
#define XFS_ITEM_LOCKED		2
#define XFS_ITEM_FLUSHING	3

/*
 * This is the type of function which can be given to xfs_trans_callback()
 * to be called upon the transaction's commit to disk.
 */
typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);

/*
 * This is the structure maintained for every active transaction.
 */
typedef struct xfs_trans {
	unsigned int		t_magic;	/* magic number */
	xfs_log_callback_t	t_logcb;	/* log callback struct */
	unsigned int		t_type;		/* transaction type */
	unsigned int		t_log_res;	/* amt of log space resvd */
	unsigned int		t_log_count;	/* count for perm log res */
	unsigned int		t_blk_res;	/* # of blocks resvd */
	unsigned int		t_blk_res_used;	/* # of resvd blocks used */
	unsigned int		t_rtx_res;	/* # of rt extents resvd */
	unsigned int		t_rtx_res_used;	/* # of resvd rt extents used */
	struct xlog_ticket	*t_ticket;	/* log mgr ticket */
	xfs_lsn_t		t_lsn;		/* log seq num of start of
						 * transaction. */
	xfs_lsn_t		t_commit_lsn;	/* log seq num of end of
						 * transaction. */
	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
	struct xfs_dquot_acct   *t_dqinfo;	/* acctg info for dquots */
	unsigned int		t_flags;	/* misc flags */
	int64_t			t_icount_delta;	/* superblock icount change */
	int64_t			t_ifree_delta;	/* superblock ifree change */
	int64_t			t_fdblocks_delta; /* superblock fdblocks chg */
	int64_t			t_res_fdblocks_delta; /* on-disk only chg */
	int64_t			t_frextents_delta;/* superblock freextents chg*/
	int64_t			t_res_frextents_delta; /* on-disk only chg */
#ifdef DEBUG
	int64_t			t_ag_freeblks_delta; /* debugging counter */
	int64_t			t_ag_flist_delta; /* debugging counter */
	int64_t			t_ag_btree_delta; /* debugging counter */
#endif
	int64_t			t_dblocks_delta;/* superblock dblocks change */
	int64_t			t_agcount_delta;/* superblock agcount change */
	int64_t			t_imaxpct_delta;/* superblock imaxpct change */
	int64_t			t_rextsize_delta;/* superblock rextsize chg */
	int64_t			t_rbmblocks_delta;/* superblock rbmblocks chg */
	int64_t			t_rblocks_delta;/* superblock rblocks change */
	int64_t			t_rextents_delta;/* superblocks rextents chg */
	int64_t			t_rextslog_delta;/* superblocks rextslog chg */
	struct list_head	t_items;	/* log item descriptors */
	xfs_trans_header_t	t_header;	/* header for in-log trans */
	struct list_head	t_busy;		/* list of busy extents */
	unsigned long		t_pflags;	/* saved process flags state */
} xfs_trans_t;

/*
 * XFS transaction mechanism exported interfaces that are
 * actually macros.
 */
#define	xfs_trans_get_log_res(tp)	((tp)->t_log_res)
#define	xfs_trans_get_log_count(tp)	((tp)->t_log_count)
#define	xfs_trans_get_block_res(tp)	((tp)->t_blk_res)
#define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)

#ifdef DEBUG
#define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (int64_t)d)
#define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (int64_t)d)
#define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (int64_t)d)
#else
#define	xfs_trans_agblocks_delta(tp, d)
#define	xfs_trans_agflist_delta(tp, d)
#define	xfs_trans_agbtree_delta(tp, d)
#endif

/*
 * XFS transaction mechanism exported interfaces.
 */
xfs_trans_t	*xfs_trans_alloc(struct xfs_mount *, uint);
xfs_trans_t	*_xfs_trans_alloc(struct xfs_mount *, uint, xfs_km_flags_t);
xfs_trans_t	*xfs_trans_dup(xfs_trans_t *);
int		xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
				  uint, uint);
void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);

struct xfs_buf	*xfs_trans_get_buf_map(struct xfs_trans *tp,
				       struct xfs_buftarg *target,
				       struct xfs_buf_map *map, int nmaps,
				       uint flags);

static inline struct xfs_buf *
xfs_trans_get_buf(
	struct xfs_trans	*tp,
	struct xfs_buftarg	*target,
	xfs_daddr_t		blkno,
	int			numblks,
	uint			flags)
{
	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
	return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
}

int		xfs_trans_read_buf_map(struct xfs_mount *mp,
				       struct xfs_trans *tp,
				       struct xfs_buftarg *target,
				       struct xfs_buf_map *map, int nmaps,
				       xfs_buf_flags_t flags,
				       struct xfs_buf **bpp,
				       const struct xfs_buf_ops *ops);

static inline int
xfs_trans_read_buf(
	struct xfs_mount	*mp,
	struct xfs_trans	*tp,
	struct xfs_buftarg	*target,
	xfs_daddr_t		blkno,
	int			numblks,
	xfs_buf_flags_t		flags,
	struct xfs_buf		**bpp,
	const struct xfs_buf_ops *ops)
{
	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
	return xfs_trans_read_buf_map(mp, tp, target, &map, 1,
				      flags, bpp, ops);
}

struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);

void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
void		xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
void		xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
void		xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
struct xfs_efi_log_item	*xfs_trans_get_efi(xfs_trans_t *, uint);
void		xfs_efi_release(struct xfs_efi_log_item *, uint);
void		xfs_trans_log_efi_extent(xfs_trans_t *,
					 struct xfs_efi_log_item *,
					 xfs_fsblock_t,
					 xfs_extlen_t);
struct xfs_efd_log_item	*xfs_trans_get_efd(xfs_trans_t *,
				  struct xfs_efi_log_item *,
				  uint);
void		xfs_trans_log_efd_extent(xfs_trans_t *,
					 struct xfs_efd_log_item *,
					 xfs_fsblock_t,
					 xfs_extlen_t);
int		xfs_trans_commit(xfs_trans_t *, uint flags);
void		xfs_trans_cancel(xfs_trans_t *, int);
int		xfs_trans_ail_init(struct xfs_mount *);
void		xfs_trans_ail_destroy(struct xfs_mount *);

extern kmem_zone_t	*xfs_trans_zone;
extern kmem_zone_t	*xfs_log_item_desc_zone;

#endif	/* __KERNEL__ */

void		xfs_trans_init(struct xfs_mount *);
int		xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);

#endif	/* __XFS_TRANS_H__ */
OpenPOWER on IntegriCloud