1 /*
2  * Copyright (c) 2000-2002,2005 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_TRANS_H__
19 #define	__XFS_TRANS_H__
20 
21 struct xfs_log_item;
22 
23 /*
24  * This is the structure written in the log at the head of
25  * every transaction. It identifies the type and id of the
26  * transaction, and contains the number of items logged by
27  * the transaction so we know how many to expect during recovery.
28  *
29  * Do not change the below structure without redoing the code in
30  * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
31  */
32 typedef struct xfs_trans_header {
33 	uint		th_magic;		/* magic number */
34 	uint		th_type;		/* transaction type */
35 	__int32_t	th_tid;			/* transaction id (unused) */
36 	uint		th_num_items;		/* num items logged by trans */
37 } xfs_trans_header_t;
38 
39 #define	XFS_TRANS_HEADER_MAGIC	0x5452414e	/* TRAN */
40 
41 /*
42  * Log item types.
43  */
44 #define	XFS_LI_EFI		0x1236
45 #define	XFS_LI_EFD		0x1237
46 #define	XFS_LI_IUNLINK		0x1238
47 #define	XFS_LI_INODE		0x123b	/* aligned ino chunks, var-size ibufs */
48 #define	XFS_LI_BUF		0x123c	/* v2 bufs, variable sized inode bufs */
49 #define	XFS_LI_DQUOT		0x123d
50 #define	XFS_LI_QUOTAOFF		0x123e
51 
52 #define XFS_LI_TYPE_DESC \
53 	{ XFS_LI_EFI,		"XFS_LI_EFI" }, \
54 	{ XFS_LI_EFD,		"XFS_LI_EFD" }, \
55 	{ XFS_LI_IUNLINK,	"XFS_LI_IUNLINK" }, \
56 	{ XFS_LI_INODE,		"XFS_LI_INODE" }, \
57 	{ XFS_LI_BUF,		"XFS_LI_BUF" }, \
58 	{ XFS_LI_DQUOT,		"XFS_LI_DQUOT" }, \
59 	{ XFS_LI_QUOTAOFF,	"XFS_LI_QUOTAOFF" }
60 
61 /*
62  * Transaction types.  Used to distinguish types of buffers.
63  */
64 #define XFS_TRANS_SETATTR_NOT_SIZE	1
65 #define XFS_TRANS_SETATTR_SIZE		2
66 #define XFS_TRANS_INACTIVE		3
67 #define XFS_TRANS_CREATE		4
68 #define XFS_TRANS_CREATE_TRUNC		5
69 #define XFS_TRANS_TRUNCATE_FILE		6
70 #define XFS_TRANS_REMOVE		7
71 #define XFS_TRANS_LINK			8
72 #define XFS_TRANS_RENAME		9
73 #define XFS_TRANS_MKDIR			10
74 #define XFS_TRANS_RMDIR			11
75 #define XFS_TRANS_SYMLINK		12
76 #define XFS_TRANS_SET_DMATTRS		13
77 #define XFS_TRANS_GROWFS		14
78 #define XFS_TRANS_STRAT_WRITE		15
79 #define XFS_TRANS_DIOSTRAT		16
80 /* 17 was XFS_TRANS_WRITE_SYNC */
81 #define	XFS_TRANS_WRITEID		18
82 #define	XFS_TRANS_ADDAFORK		19
83 #define	XFS_TRANS_ATTRINVAL		20
84 #define	XFS_TRANS_ATRUNCATE		21
85 #define	XFS_TRANS_ATTR_SET		22
86 #define	XFS_TRANS_ATTR_RM		23
87 #define	XFS_TRANS_ATTR_FLAG		24
88 #define	XFS_TRANS_CLEAR_AGI_BUCKET	25
89 #define XFS_TRANS_QM_SBCHANGE		26
90 /*
91  * Dummy entries since we use the transaction type to index into the
92  * trans_type[] in xlog_recover_print_trans_head()
93  */
94 #define XFS_TRANS_DUMMY1		27
95 #define XFS_TRANS_DUMMY2		28
96 #define XFS_TRANS_QM_QUOTAOFF		29
97 #define XFS_TRANS_QM_DQALLOC		30
98 #define XFS_TRANS_QM_SETQLIM		31
99 #define XFS_TRANS_QM_DQCLUSTER		32
100 #define XFS_TRANS_QM_QINOCREATE		33
101 #define XFS_TRANS_QM_QUOTAOFF_END	34
102 #define XFS_TRANS_SB_UNIT		35
103 #define XFS_TRANS_FSYNC_TS		36
104 #define	XFS_TRANS_GROWFSRT_ALLOC	37
105 #define	XFS_TRANS_GROWFSRT_ZERO		38
106 #define	XFS_TRANS_GROWFSRT_FREE		39
107 #define	XFS_TRANS_SWAPEXT		40
108 #define	XFS_TRANS_SB_COUNT		41
109 #define	XFS_TRANS_CHECKPOINT		42
110 #define	XFS_TRANS_TYPE_MAX		42
111 /* new transaction types need to be reflected in xfs_logprint(8) */
112 
113 #define XFS_TRANS_TYPES \
114 	{ XFS_TRANS_SETATTR_NOT_SIZE,	"SETATTR_NOT_SIZE" }, \
115 	{ XFS_TRANS_SETATTR_SIZE,	"SETATTR_SIZE" }, \
116 	{ XFS_TRANS_INACTIVE,		"INACTIVE" }, \
117 	{ XFS_TRANS_CREATE,		"CREATE" }, \
118 	{ XFS_TRANS_CREATE_TRUNC,	"CREATE_TRUNC" }, \
119 	{ XFS_TRANS_TRUNCATE_FILE,	"TRUNCATE_FILE" }, \
120 	{ XFS_TRANS_REMOVE,		"REMOVE" }, \
121 	{ XFS_TRANS_LINK,		"LINK" }, \
122 	{ XFS_TRANS_RENAME,		"RENAME" }, \
123 	{ XFS_TRANS_MKDIR,		"MKDIR" }, \
124 	{ XFS_TRANS_RMDIR,		"RMDIR" }, \
125 	{ XFS_TRANS_SYMLINK,		"SYMLINK" }, \
126 	{ XFS_TRANS_SET_DMATTRS,	"SET_DMATTRS" }, \
127 	{ XFS_TRANS_GROWFS,		"GROWFS" }, \
128 	{ XFS_TRANS_STRAT_WRITE,	"STRAT_WRITE" }, \
129 	{ XFS_TRANS_DIOSTRAT,		"DIOSTRAT" }, \
130 	{ XFS_TRANS_WRITEID,		"WRITEID" }, \
131 	{ XFS_TRANS_ADDAFORK,		"ADDAFORK" }, \
132 	{ XFS_TRANS_ATTRINVAL,		"ATTRINVAL" }, \
133 	{ XFS_TRANS_ATRUNCATE,		"ATRUNCATE" }, \
134 	{ XFS_TRANS_ATTR_SET,		"ATTR_SET" }, \
135 	{ XFS_TRANS_ATTR_RM,		"ATTR_RM" }, \
136 	{ XFS_TRANS_ATTR_FLAG,		"ATTR_FLAG" }, \
137 	{ XFS_TRANS_CLEAR_AGI_BUCKET,	"CLEAR_AGI_BUCKET" }, \
138 	{ XFS_TRANS_QM_SBCHANGE,	"QM_SBCHANGE" }, \
139 	{ XFS_TRANS_QM_QUOTAOFF,	"QM_QUOTAOFF" }, \
140 	{ XFS_TRANS_QM_DQALLOC,		"QM_DQALLOC" }, \
141 	{ XFS_TRANS_QM_SETQLIM,		"QM_SETQLIM" }, \
142 	{ XFS_TRANS_QM_DQCLUSTER,	"QM_DQCLUSTER" }, \
143 	{ XFS_TRANS_QM_QINOCREATE,	"QM_QINOCREATE" }, \
144 	{ XFS_TRANS_QM_QUOTAOFF_END,	"QM_QOFF_END" }, \
145 	{ XFS_TRANS_SB_UNIT,		"SB_UNIT" }, \
146 	{ XFS_TRANS_FSYNC_TS,		"FSYNC_TS" }, \
147 	{ XFS_TRANS_GROWFSRT_ALLOC,	"GROWFSRT_ALLOC" }, \
148 	{ XFS_TRANS_GROWFSRT_ZERO,	"GROWFSRT_ZERO" }, \
149 	{ XFS_TRANS_GROWFSRT_FREE,	"GROWFSRT_FREE" }, \
150 	{ XFS_TRANS_SWAPEXT,		"SWAPEXT" }, \
151 	{ XFS_TRANS_SB_COUNT,		"SB_COUNT" }, \
152 	{ XFS_TRANS_CHECKPOINT,		"CHECKPOINT" }, \
153 	{ XFS_TRANS_DUMMY1,		"DUMMY1" }, \
154 	{ XFS_TRANS_DUMMY2,		"DUMMY2" }, \
155 	{ XLOG_UNMOUNT_REC_TYPE,	"UNMOUNT" }
156 
157 /*
158  * This structure is used to track log items associated with
159  * a transaction.  It points to the log item and keeps some
160  * flags to track the state of the log item.  It also tracks
161  * the amount of space needed to log the item it describes
162  * once we get to commit processing (see xfs_trans_commit()).
163  */
164 struct xfs_log_item_desc {
165 	struct xfs_log_item	*lid_item;
166 	struct list_head	lid_trans;
167 	unsigned char		lid_flags;
168 };
169 
170 #define XFS_LID_DIRTY		0x1
171 
172 #define	XFS_TRANS_MAGIC		0x5452414E	/* 'TRAN' */
173 /*
174  * Values for t_flags.
175  */
176 #define	XFS_TRANS_DIRTY		0x01	/* something needs to be logged */
177 #define	XFS_TRANS_SB_DIRTY	0x02	/* superblock is modified */
178 #define	XFS_TRANS_PERM_LOG_RES	0x04	/* xact took a permanent log res */
179 #define	XFS_TRANS_SYNC		0x08	/* make commit synchronous */
180 #define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
181 #define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
182 
183 /*
184  * Values for call flags parameter.
185  */
186 #define	XFS_TRANS_RELEASE_LOG_RES	0x4
187 #define	XFS_TRANS_ABORT			0x8
188 
189 /*
190  * Field values for xfs_trans_mod_sb.
191  */
192 #define	XFS_TRANS_SB_ICOUNT		0x00000001
193 #define	XFS_TRANS_SB_IFREE		0x00000002
194 #define	XFS_TRANS_SB_FDBLOCKS		0x00000004
195 #define	XFS_TRANS_SB_RES_FDBLOCKS	0x00000008
196 #define	XFS_TRANS_SB_FREXTENTS		0x00000010
197 #define	XFS_TRANS_SB_RES_FREXTENTS	0x00000020
198 #define	XFS_TRANS_SB_DBLOCKS		0x00000040
199 #define	XFS_TRANS_SB_AGCOUNT		0x00000080
200 #define	XFS_TRANS_SB_IMAXPCT		0x00000100
201 #define	XFS_TRANS_SB_REXTSIZE		0x00000200
202 #define	XFS_TRANS_SB_RBMBLOCKS		0x00000400
203 #define	XFS_TRANS_SB_RBLOCKS		0x00000800
204 #define	XFS_TRANS_SB_REXTENTS		0x00001000
205 #define	XFS_TRANS_SB_REXTSLOG		0x00002000
206 
207 
208 /*
209  * Per-extent log reservation for the allocation btree changes
210  * involved in freeing or allocating an extent.
211  * 2 trees * (2 blocks/level * max depth - 1) * block size
212  */
213 #define	XFS_ALLOCFREE_LOG_RES(mp,nx) \
214 	((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
215 #define	XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
216 	((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
217 
218 /*
219  * Per-directory log reservation for any directory change.
220  * dir blocks: (1 btree block per level + data block + free block) * dblock size
221  * bmap btree: (levels + 2) * max depth * block size
222  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
223  * size, so account for that in the DAENTER macros.
224  */
225 #define	XFS_DIROP_LOG_RES(mp)	\
226 	(XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
227 	 (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
228 #define	XFS_DIROP_LOG_COUNT(mp)	\
229 	(XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
230 	 XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
231 
232 
233 #define	XFS_WRITE_LOG_RES(mp)	((mp)->m_reservations.tr_write)
234 #define	XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
235 #define	XFS_RENAME_LOG_RES(mp)	((mp)->m_reservations.tr_rename)
236 #define	XFS_LINK_LOG_RES(mp)	((mp)->m_reservations.tr_link)
237 #define	XFS_REMOVE_LOG_RES(mp)	((mp)->m_reservations.tr_remove)
238 #define	XFS_SYMLINK_LOG_RES(mp)	((mp)->m_reservations.tr_symlink)
239 #define	XFS_CREATE_LOG_RES(mp)	((mp)->m_reservations.tr_create)
240 #define	XFS_MKDIR_LOG_RES(mp)	((mp)->m_reservations.tr_mkdir)
241 #define	XFS_IFREE_LOG_RES(mp)	((mp)->m_reservations.tr_ifree)
242 #define	XFS_ICHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_ichange)
243 #define	XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
244 #define	XFS_GROWRTALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_growrtalloc)
245 #define	XFS_GROWRTZERO_LOG_RES(mp)	((mp)->m_reservations.tr_growrtzero)
246 #define	XFS_GROWRTFREE_LOG_RES(mp)	((mp)->m_reservations.tr_growrtfree)
247 #define	XFS_SWRITE_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)
248 /*
249  * Logging the inode timestamps on an fsync -- same as SWRITE
250  * as long as SWRITE logs the entire inode core
251  */
252 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
253 #define	XFS_WRITEID_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)
254 #define	XFS_ADDAFORK_LOG_RES(mp)	((mp)->m_reservations.tr_addafork)
255 #define	XFS_ATTRINVAL_LOG_RES(mp)	((mp)->m_reservations.tr_attrinval)
256 #define	XFS_ATTRSET_LOG_RES(mp, ext)	\
257 	((mp)->m_reservations.tr_attrset + \
258 	 (ext * (mp)->m_sb.sb_sectsize) + \
259 	 (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
260 	 (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
261 #define	XFS_ATTRRM_LOG_RES(mp)	((mp)->m_reservations.tr_attrrm)
262 #define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
263 
264 
265 /*
266  * Various log count values.
267  */
268 #define	XFS_DEFAULT_LOG_COUNT		1
269 #define	XFS_DEFAULT_PERM_LOG_COUNT	2
270 #define	XFS_ITRUNCATE_LOG_COUNT		2
271 #define XFS_INACTIVE_LOG_COUNT		2
272 #define	XFS_CREATE_LOG_COUNT		2
273 #define	XFS_MKDIR_LOG_COUNT		3
274 #define	XFS_SYMLINK_LOG_COUNT		3
275 #define	XFS_REMOVE_LOG_COUNT		2
276 #define	XFS_LINK_LOG_COUNT		2
277 #define	XFS_RENAME_LOG_COUNT		2
278 #define	XFS_WRITE_LOG_COUNT		2
279 #define	XFS_ADDAFORK_LOG_COUNT		2
280 #define	XFS_ATTRINVAL_LOG_COUNT		1
281 #define	XFS_ATTRSET_LOG_COUNT		3
282 #define	XFS_ATTRRM_LOG_COUNT		3
283 
284 /*
285  * Here we centralize the specification of XFS meta-data buffer
286  * reference count values.  This determine how hard the buffer
287  * cache tries to hold onto the buffer.
288  */
289 #define	XFS_AGF_REF		4
290 #define	XFS_AGI_REF		4
291 #define	XFS_AGFL_REF		3
292 #define	XFS_INO_BTREE_REF	3
293 #define	XFS_ALLOC_BTREE_REF	2
294 #define	XFS_BMAP_BTREE_REF	2
295 #define	XFS_DIR_BTREE_REF	2
296 #define	XFS_INO_REF		2
297 #define	XFS_ATTR_BTREE_REF	1
298 #define	XFS_DQUOT_REF		1
299 
300 #ifdef __KERNEL__
301 
302 struct xfs_buf;
303 struct xfs_buftarg;
304 struct xfs_efd_log_item;
305 struct xfs_efi_log_item;
306 struct xfs_inode;
307 struct xfs_item_ops;
308 struct xfs_log_iovec;
309 struct xfs_log_item_desc;
310 struct xfs_mount;
311 struct xfs_trans;
312 struct xfs_dquot_acct;
313 struct xfs_busy_extent;
314 
315 typedef struct xfs_log_item {
316 	struct list_head		li_ail;		/* AIL pointers */
317 	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
318 	struct xfs_log_item_desc	*li_desc;	/* ptr to current desc*/
319 	struct xfs_mount		*li_mountp;	/* ptr to fs mount */
320 	struct xfs_ail			*li_ailp;	/* ptr to AIL */
321 	uint				li_type;	/* item type */
322 	uint				li_flags;	/* misc flags */
323 	struct xfs_log_item		*li_bio_list;	/* buffer item list */
324 	void				(*li_cb)(struct xfs_buf *,
325 						 struct xfs_log_item *);
326 							/* buffer item iodone */
327 							/* callback func */
328 	const struct xfs_item_ops	*li_ops;	/* function list */
329 
330 	/* delayed logging */
331 	struct list_head		li_cil;		/* CIL pointers */
332 	struct xfs_log_vec		*li_lv;		/* active log vector */
333 	xfs_lsn_t			li_seq;		/* CIL commit seq */
334 } xfs_log_item_t;
335 
336 #define	XFS_LI_IN_AIL	0x1
337 #define XFS_LI_ABORTED	0x2
338 
339 #define XFS_LI_FLAGS \
340 	{ XFS_LI_IN_AIL,	"IN_AIL" }, \
341 	{ XFS_LI_ABORTED,	"ABORTED" }
342 
343 struct xfs_item_ops {
344 	uint (*iop_size)(xfs_log_item_t *);
345 	void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
346 	void (*iop_pin)(xfs_log_item_t *);
347 	void (*iop_unpin)(xfs_log_item_t *, int remove);
348 	uint (*iop_trylock)(xfs_log_item_t *);
349 	void (*iop_unlock)(xfs_log_item_t *);
350 	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
351 	void (*iop_push)(xfs_log_item_t *);
352 	bool (*iop_pushbuf)(xfs_log_item_t *);
353 	void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
354 };
355 
356 #define IOP_SIZE(ip)		(*(ip)->li_ops->iop_size)(ip)
357 #define IOP_FORMAT(ip,vp)	(*(ip)->li_ops->iop_format)(ip, vp)
358 #define IOP_PIN(ip)		(*(ip)->li_ops->iop_pin)(ip)
359 #define IOP_UNPIN(ip, remove)	(*(ip)->li_ops->iop_unpin)(ip, remove)
360 #define IOP_TRYLOCK(ip)		(*(ip)->li_ops->iop_trylock)(ip)
361 #define IOP_UNLOCK(ip)		(*(ip)->li_ops->iop_unlock)(ip)
362 #define IOP_COMMITTED(ip, lsn)	(*(ip)->li_ops->iop_committed)(ip, lsn)
363 #define IOP_PUSH(ip)		(*(ip)->li_ops->iop_push)(ip)
364 #define IOP_PUSHBUF(ip)		(*(ip)->li_ops->iop_pushbuf)(ip)
365 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
366 
367 /*
368  * Return values for the IOP_TRYLOCK() routines.
369  */
370 #define	XFS_ITEM_SUCCESS	0
371 #define	XFS_ITEM_PINNED		1
372 #define	XFS_ITEM_LOCKED		2
373 #define XFS_ITEM_PUSHBUF	3
374 
375 /*
376  * This is the type of function which can be given to xfs_trans_callback()
377  * to be called upon the transaction's commit to disk.
378  */
379 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
380 
381 /*
382  * This is the structure maintained for every active transaction.
383  */
384 typedef struct xfs_trans {
385 	unsigned int		t_magic;	/* magic number */
386 	xfs_log_callback_t	t_logcb;	/* log callback struct */
387 	unsigned int		t_type;		/* transaction type */
388 	unsigned int		t_log_res;	/* amt of log space resvd */
389 	unsigned int		t_log_count;	/* count for perm log res */
390 	unsigned int		t_blk_res;	/* # of blocks resvd */
391 	unsigned int		t_blk_res_used;	/* # of resvd blocks used */
392 	unsigned int		t_rtx_res;	/* # of rt extents resvd */
393 	unsigned int		t_rtx_res_used;	/* # of resvd rt extents used */
394 	struct xlog_ticket	*t_ticket;	/* log mgr ticket */
395 	xfs_lsn_t		t_lsn;		/* log seq num of start of
396 						 * transaction. */
397 	xfs_lsn_t		t_commit_lsn;	/* log seq num of end of
398 						 * transaction. */
399 	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
400 	struct xfs_dquot_acct   *t_dqinfo;	/* acctg info for dquots */
401 	unsigned int		t_flags;	/* misc flags */
402 	int64_t			t_icount_delta;	/* superblock icount change */
403 	int64_t			t_ifree_delta;	/* superblock ifree change */
404 	int64_t			t_fdblocks_delta; /* superblock fdblocks chg */
405 	int64_t			t_res_fdblocks_delta; /* on-disk only chg */
406 	int64_t			t_frextents_delta;/* superblock freextents chg*/
407 	int64_t			t_res_frextents_delta; /* on-disk only chg */
408 #ifdef DEBUG
409 	int64_t			t_ag_freeblks_delta; /* debugging counter */
410 	int64_t			t_ag_flist_delta; /* debugging counter */
411 	int64_t			t_ag_btree_delta; /* debugging counter */
412 #endif
413 	int64_t			t_dblocks_delta;/* superblock dblocks change */
414 	int64_t			t_agcount_delta;/* superblock agcount change */
415 	int64_t			t_imaxpct_delta;/* superblock imaxpct change */
416 	int64_t			t_rextsize_delta;/* superblock rextsize chg */
417 	int64_t			t_rbmblocks_delta;/* superblock rbmblocks chg */
418 	int64_t			t_rblocks_delta;/* superblock rblocks change */
419 	int64_t			t_rextents_delta;/* superblocks rextents chg */
420 	int64_t			t_rextslog_delta;/* superblocks rextslog chg */
421 	struct list_head	t_items;	/* log item descriptors */
422 	xfs_trans_header_t	t_header;	/* header for in-log trans */
423 	struct list_head	t_busy;		/* list of busy extents */
424 	unsigned long		t_pflags;	/* saved process flags state */
425 } xfs_trans_t;
426 
427 /*
428  * XFS transaction mechanism exported interfaces that are
429  * actually macros.
430  */
431 #define	xfs_trans_get_log_res(tp)	((tp)->t_log_res)
432 #define	xfs_trans_get_log_count(tp)	((tp)->t_log_count)
433 #define	xfs_trans_get_block_res(tp)	((tp)->t_blk_res)
434 #define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)
435 
436 #ifdef DEBUG
437 #define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (int64_t)d)
438 #define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (int64_t)d)
439 #define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (int64_t)d)
440 #else
441 #define	xfs_trans_agblocks_delta(tp, d)
442 #define	xfs_trans_agflist_delta(tp, d)
443 #define	xfs_trans_agbtree_delta(tp, d)
444 #endif
445 
446 /*
447  * XFS transaction mechanism exported interfaces.
448  */
449 xfs_trans_t	*xfs_trans_alloc(struct xfs_mount *, uint);
450 xfs_trans_t	*_xfs_trans_alloc(struct xfs_mount *, uint, uint);
451 xfs_trans_t	*xfs_trans_dup(xfs_trans_t *);
452 int		xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
453 				  uint, uint);
454 void		xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
455 struct xfs_buf	*xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
456 				   int, uint);
457 int		xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
458 				   struct xfs_buftarg *, xfs_daddr_t, int, uint,
459 				   struct xfs_buf **);
460 struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
461 
462 void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
463 void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
464 void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
465 void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
466 void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
467 void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
468 void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
469 void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
470 void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
471 void		xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
472 void		xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
473 void		xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
474 void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
475 struct xfs_efi_log_item	*xfs_trans_get_efi(xfs_trans_t *, uint);
476 void		xfs_efi_release(struct xfs_efi_log_item *, uint);
477 void		xfs_trans_log_efi_extent(xfs_trans_t *,
478 					 struct xfs_efi_log_item *,
479 					 xfs_fsblock_t,
480 					 xfs_extlen_t);
481 struct xfs_efd_log_item	*xfs_trans_get_efd(xfs_trans_t *,
482 				  struct xfs_efi_log_item *,
483 				  uint);
484 void		xfs_trans_log_efd_extent(xfs_trans_t *,
485 					 struct xfs_efd_log_item *,
486 					 xfs_fsblock_t,
487 					 xfs_extlen_t);
488 int		xfs_trans_commit(xfs_trans_t *, uint flags);
489 void		xfs_trans_cancel(xfs_trans_t *, int);
490 int		xfs_trans_ail_init(struct xfs_mount *);
491 void		xfs_trans_ail_destroy(struct xfs_mount *);
492 
493 extern kmem_zone_t	*xfs_trans_zone;
494 extern kmem_zone_t	*xfs_log_item_desc_zone;
495 
496 #endif	/* __KERNEL__ */
497 
498 void		xfs_trans_init(struct xfs_mount *);
499 int		xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
500 
501 #endif	/* __XFS_TRANS_H__ */
502