xref: /openbmc/linux/fs/xfs/xfs_trans.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
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 /*
22  * This is the structure written in the log at the head of
23  * every transaction. It identifies the type and id of the
24  * transaction, and contains the number of items logged by
25  * the transaction so we know how many to expect during recovery.
26  *
27  * Do not change the below structure without redoing the code in
28  * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
29  */
30 typedef struct xfs_trans_header {
31 	uint		th_magic;		/* magic number */
32 	uint		th_type;		/* transaction type */
33 	__int32_t	th_tid;			/* transaction id (unused) */
34 	uint		th_num_items;		/* num items logged by trans */
35 } xfs_trans_header_t;
36 
37 #define	XFS_TRANS_HEADER_MAGIC	0x5452414e	/* TRAN */
38 
39 /*
40  * Log item types.
41  */
42 #define	XFS_LI_5_3_BUF		0x1234	/* v1 bufs, 1-block inode buffers */
43 #define	XFS_LI_5_3_INODE	0x1235	/* 1-block inode buffers */
44 #define	XFS_LI_EFI		0x1236
45 #define	XFS_LI_EFD		0x1237
46 #define	XFS_LI_IUNLINK		0x1238
47 #define	XFS_LI_6_1_INODE	0x1239	/* 4K non-aligned inode bufs */
48 #define	XFS_LI_6_1_BUF		0x123a	/* v1, 4K inode buffers */
49 #define	XFS_LI_INODE		0x123b	/* aligned ino chunks, var-size ibufs */
50 #define	XFS_LI_BUF		0x123c	/* v2 bufs, variable sized inode bufs */
51 #define	XFS_LI_DQUOT		0x123d
52 #define	XFS_LI_QUOTAOFF		0x123e
53 
54 /*
55  * Transaction types.  Used to distinguish types of buffers.
56  */
57 #define XFS_TRANS_SETATTR_NOT_SIZE	1
58 #define XFS_TRANS_SETATTR_SIZE		2
59 #define XFS_TRANS_INACTIVE		3
60 #define XFS_TRANS_CREATE		4
61 #define XFS_TRANS_CREATE_TRUNC		5
62 #define XFS_TRANS_TRUNCATE_FILE		6
63 #define XFS_TRANS_REMOVE		7
64 #define XFS_TRANS_LINK			8
65 #define XFS_TRANS_RENAME		9
66 #define XFS_TRANS_MKDIR			10
67 #define XFS_TRANS_RMDIR			11
68 #define XFS_TRANS_SYMLINK		12
69 #define XFS_TRANS_SET_DMATTRS		13
70 #define XFS_TRANS_GROWFS		14
71 #define XFS_TRANS_STRAT_WRITE		15
72 #define XFS_TRANS_DIOSTRAT		16
73 #define	XFS_TRANS_WRITE_SYNC		17
74 #define	XFS_TRANS_WRITEID		18
75 #define	XFS_TRANS_ADDAFORK		19
76 #define	XFS_TRANS_ATTRINVAL		20
77 #define	XFS_TRANS_ATRUNCATE		21
78 #define	XFS_TRANS_ATTR_SET		22
79 #define	XFS_TRANS_ATTR_RM		23
80 #define	XFS_TRANS_ATTR_FLAG		24
81 #define	XFS_TRANS_CLEAR_AGI_BUCKET	25
82 #define XFS_TRANS_QM_SBCHANGE		26
83 /*
84  * Dummy entries since we use the transaction type to index into the
85  * trans_type[] in xlog_recover_print_trans_head()
86  */
87 #define XFS_TRANS_DUMMY1		27
88 #define XFS_TRANS_DUMMY2		28
89 #define XFS_TRANS_QM_QUOTAOFF		29
90 #define XFS_TRANS_QM_DQALLOC		30
91 #define XFS_TRANS_QM_SETQLIM		31
92 #define XFS_TRANS_QM_DQCLUSTER		32
93 #define XFS_TRANS_QM_QINOCREATE		33
94 #define XFS_TRANS_QM_QUOTAOFF_END	34
95 #define XFS_TRANS_SB_UNIT		35
96 #define XFS_TRANS_FSYNC_TS		36
97 #define	XFS_TRANS_GROWFSRT_ALLOC	37
98 #define	XFS_TRANS_GROWFSRT_ZERO		38
99 #define	XFS_TRANS_GROWFSRT_FREE		39
100 #define	XFS_TRANS_SWAPEXT		40
101 #define	XFS_TRANS_TYPE_MAX		40
102 /* new transaction types need to be reflected in xfs_logprint(8) */
103 
104 
105 #ifdef __KERNEL__
106 struct xfs_buf;
107 struct xfs_buftarg;
108 struct xfs_efd_log_item;
109 struct xfs_efi_log_item;
110 struct xfs_inode;
111 struct xfs_item_ops;
112 struct xfs_log_iovec;
113 struct xfs_log_item;
114 struct xfs_log_item_desc;
115 struct xfs_mount;
116 struct xfs_trans;
117 struct xfs_dquot_acct;
118 
119 typedef struct xfs_ail_entry {
120 	struct xfs_log_item	*ail_forw;	/* AIL forw pointer */
121 	struct xfs_log_item	*ail_back;	/* AIL back pointer */
122 } xfs_ail_entry_t;
123 
124 typedef struct xfs_log_item {
125 	xfs_ail_entry_t			li_ail;		/* AIL pointers */
126 	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
127 	struct xfs_log_item_desc	*li_desc;	/* ptr to current desc*/
128 	struct xfs_mount		*li_mountp;	/* ptr to fs mount */
129 	uint				li_type;	/* item type */
130 	uint				li_flags;	/* misc flags */
131 	struct xfs_log_item		*li_bio_list;	/* buffer item list */
132 	void				(*li_cb)(struct xfs_buf *,
133 						 struct xfs_log_item *);
134 							/* buffer item iodone */
135 							/* callback func */
136 	struct xfs_item_ops		*li_ops;	/* function list */
137 } xfs_log_item_t;
138 
139 #define	XFS_LI_IN_AIL	0x1
140 #define XFS_LI_ABORTED	0x2
141 
142 typedef struct xfs_item_ops {
143 	uint (*iop_size)(xfs_log_item_t *);
144 	void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
145 	void (*iop_pin)(xfs_log_item_t *);
146 	void (*iop_unpin)(xfs_log_item_t *, int);
147 	void (*iop_unpin_remove)(xfs_log_item_t *, struct xfs_trans *);
148 	uint (*iop_trylock)(xfs_log_item_t *);
149 	void (*iop_unlock)(xfs_log_item_t *);
150 	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
151 	void (*iop_push)(xfs_log_item_t *);
152 	void (*iop_abort)(xfs_log_item_t *);
153 	void (*iop_pushbuf)(xfs_log_item_t *);
154 	void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
155 } xfs_item_ops_t;
156 
157 #define IOP_SIZE(ip)		(*(ip)->li_ops->iop_size)(ip)
158 #define IOP_FORMAT(ip,vp)	(*(ip)->li_ops->iop_format)(ip, vp)
159 #define IOP_PIN(ip)		(*(ip)->li_ops->iop_pin)(ip)
160 #define IOP_UNPIN(ip, flags)	(*(ip)->li_ops->iop_unpin)(ip, flags)
161 #define IOP_UNPIN_REMOVE(ip,tp) (*(ip)->li_ops->iop_unpin_remove)(ip, tp)
162 #define IOP_TRYLOCK(ip)		(*(ip)->li_ops->iop_trylock)(ip)
163 #define IOP_UNLOCK(ip)		(*(ip)->li_ops->iop_unlock)(ip)
164 #define IOP_COMMITTED(ip, lsn)	(*(ip)->li_ops->iop_committed)(ip, lsn)
165 #define IOP_PUSH(ip)		(*(ip)->li_ops->iop_push)(ip)
166 #define IOP_ABORT(ip)		(*(ip)->li_ops->iop_abort)(ip)
167 #define IOP_PUSHBUF(ip)		(*(ip)->li_ops->iop_pushbuf)(ip)
168 #define IOP_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
169 
170 /*
171  * Return values for the IOP_TRYLOCK() routines.
172  */
173 #define	XFS_ITEM_SUCCESS	0
174 #define	XFS_ITEM_PINNED		1
175 #define	XFS_ITEM_LOCKED		2
176 #define	XFS_ITEM_FLUSHING	3
177 #define XFS_ITEM_PUSHBUF	4
178 
179 #endif	/* __KERNEL__ */
180 
181 /*
182  * This structure is used to track log items associated with
183  * a transaction.  It points to the log item and keeps some
184  * flags to track the state of the log item.  It also tracks
185  * the amount of space needed to log the item it describes
186  * once we get to commit processing (see xfs_trans_commit()).
187  */
188 typedef struct xfs_log_item_desc {
189 	xfs_log_item_t	*lid_item;
190 	ushort		lid_size;
191 	unsigned char	lid_flags;
192 	unsigned char	lid_index;
193 } xfs_log_item_desc_t;
194 
195 #define XFS_LID_DIRTY		0x1
196 #define XFS_LID_PINNED		0x2
197 #define XFS_LID_BUF_STALE	0x8
198 
199 /*
200  * This structure is used to maintain a chunk list of log_item_desc
201  * structures. The free field is a bitmask indicating which descriptors
202  * in this chunk's array are free.  The unused field is the first value
203  * not used since this chunk was allocated.
204  */
205 #define	XFS_LIC_NUM_SLOTS	15
206 typedef struct xfs_log_item_chunk {
207 	struct xfs_log_item_chunk	*lic_next;
208 	ushort				lic_free;
209 	ushort				lic_unused;
210 	xfs_log_item_desc_t		lic_descs[XFS_LIC_NUM_SLOTS];
211 } xfs_log_item_chunk_t;
212 
213 #define	XFS_LIC_MAX_SLOT	(XFS_LIC_NUM_SLOTS - 1)
214 #define	XFS_LIC_FREEMASK	((1 << XFS_LIC_NUM_SLOTS) - 1)
215 
216 
217 /*
218  * Initialize the given chunk.  Set the chunk's free descriptor mask
219  * to indicate that all descriptors are free.  The caller gets to set
220  * lic_unused to the right value (0 matches all free).  The
221  * lic_descs.lid_index values are set up as each desc is allocated.
222  */
223 #define	XFS_LIC_INIT(cp)	xfs_lic_init(cp)
224 static inline void xfs_lic_init(xfs_log_item_chunk_t *cp)
225 {
226 	cp->lic_free = XFS_LIC_FREEMASK;
227 }
228 
229 #define	XFS_LIC_INIT_SLOT(cp,slot)	xfs_lic_init_slot(cp, slot)
230 static inline void xfs_lic_init_slot(xfs_log_item_chunk_t *cp, int slot)
231 {
232 	cp->lic_descs[slot].lid_index = (unsigned char)(slot);
233 }
234 
235 #define	XFS_LIC_VACANCY(cp)		xfs_lic_vacancy(cp)
236 static inline int xfs_lic_vacancy(xfs_log_item_chunk_t *cp)
237 {
238 	return cp->lic_free & XFS_LIC_FREEMASK;
239 }
240 
241 #define	XFS_LIC_ALL_FREE(cp)		xfs_lic_all_free(cp)
242 static inline void xfs_lic_all_free(xfs_log_item_chunk_t *cp)
243 {
244 	cp->lic_free = XFS_LIC_FREEMASK;
245 }
246 
247 #define	XFS_LIC_ARE_ALL_FREE(cp)	xfs_lic_are_all_free(cp)
248 static inline int xfs_lic_are_all_free(xfs_log_item_chunk_t *cp)
249 {
250 	return ((cp->lic_free & XFS_LIC_FREEMASK) == XFS_LIC_FREEMASK);
251 }
252 
253 #define	XFS_LIC_ISFREE(cp,slot)	xfs_lic_isfree(cp,slot)
254 static inline int xfs_lic_isfree(xfs_log_item_chunk_t *cp, int slot)
255 {
256 	return (cp->lic_free & (1 << slot));
257 }
258 
259 #define	XFS_LIC_CLAIM(cp,slot)		xfs_lic_claim(cp,slot)
260 static inline void xfs_lic_claim(xfs_log_item_chunk_t *cp, int slot)
261 {
262 	cp->lic_free &= ~(1 << slot);
263 }
264 
265 #define	XFS_LIC_RELSE(cp,slot)		xfs_lic_relse(cp,slot)
266 static inline void xfs_lic_relse(xfs_log_item_chunk_t *cp, int slot)
267 {
268 	cp->lic_free |= 1 << slot;
269 }
270 
271 #define	XFS_LIC_SLOT(cp,slot)		xfs_lic_slot(cp,slot)
272 static inline xfs_log_item_desc_t *
273 xfs_lic_slot(xfs_log_item_chunk_t *cp, int slot)
274 {
275 	return &(cp->lic_descs[slot]);
276 }
277 
278 #define	XFS_LIC_DESC_TO_SLOT(dp)	xfs_lic_desc_to_slot(dp)
279 static inline int xfs_lic_desc_to_slot(xfs_log_item_desc_t *dp)
280 {
281 	return (uint)dp->lid_index;
282 }
283 
284 /*
285  * Calculate the address of a chunk given a descriptor pointer:
286  * dp - dp->lid_index give the address of the start of the lic_descs array.
287  * From this we subtract the offset of the lic_descs field in a chunk.
288  * All of this yields the address of the chunk, which is
289  * cast to a chunk pointer.
290  */
291 #define	XFS_LIC_DESC_TO_CHUNK(dp)	xfs_lic_desc_to_chunk(dp)
292 static inline xfs_log_item_chunk_t *
293 xfs_lic_desc_to_chunk(xfs_log_item_desc_t *dp)
294 {
295 	return (xfs_log_item_chunk_t*) \
296 		(((xfs_caddr_t)((dp) - (dp)->lid_index)) - \
297 		(xfs_caddr_t)(((xfs_log_item_chunk_t*)0)->lic_descs));
298 }
299 
300 #ifdef __KERNEL__
301 /*
302  * This structure is used to maintain a list of block ranges that have been
303  * freed in the transaction.  The ranges are listed in the perag[] busy list
304  * between when they're freed and the transaction is committed to disk.
305  */
306 
307 typedef struct xfs_log_busy_slot {
308 	xfs_agnumber_t		lbc_ag;
309 	ushort			lbc_idx;	/* index in perag.busy[] */
310 } xfs_log_busy_slot_t;
311 
312 #define XFS_LBC_NUM_SLOTS	31
313 typedef struct xfs_log_busy_chunk {
314 	struct xfs_log_busy_chunk	*lbc_next;
315 	uint				lbc_free;	/* free slots bitmask */
316 	ushort				lbc_unused;	/* first unused */
317 	xfs_log_busy_slot_t		lbc_busy[XFS_LBC_NUM_SLOTS];
318 } xfs_log_busy_chunk_t;
319 
320 #define	XFS_LBC_MAX_SLOT	(XFS_LBC_NUM_SLOTS - 1)
321 #define	XFS_LBC_FREEMASK	((1U << XFS_LBC_NUM_SLOTS) - 1)
322 
323 #define	XFS_LBC_INIT(cp)	((cp)->lbc_free = XFS_LBC_FREEMASK)
324 #define	XFS_LBC_CLAIM(cp, slot)	((cp)->lbc_free &= ~(1 << (slot)))
325 #define	XFS_LBC_SLOT(cp, slot)	(&((cp)->lbc_busy[(slot)]))
326 #define	XFS_LBC_VACANCY(cp)	(((cp)->lbc_free) & XFS_LBC_FREEMASK)
327 #define	XFS_LBC_ISFREE(cp, slot) ((cp)->lbc_free & (1 << (slot)))
328 
329 /*
330  * This is the type of function which can be given to xfs_trans_callback()
331  * to be called upon the transaction's commit to disk.
332  */
333 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
334 
335 /*
336  * This is the structure maintained for every active transaction.
337  */
338 typedef struct xfs_trans {
339 	unsigned int		t_magic;	/* magic number */
340 	xfs_log_callback_t	t_logcb;	/* log callback struct */
341 	struct xfs_trans	*t_forw;	/* async list pointers */
342 	struct xfs_trans	*t_back;	/* async list pointers */
343 	unsigned int		t_type;		/* transaction type */
344 	unsigned int		t_log_res;	/* amt of log space resvd */
345 	unsigned int		t_log_count;	/* count for perm log res */
346 	unsigned int		t_blk_res;	/* # of blocks resvd */
347 	unsigned int		t_blk_res_used;	/* # of resvd blocks used */
348 	unsigned int		t_rtx_res;	/* # of rt extents resvd */
349 	unsigned int		t_rtx_res_used;	/* # of resvd rt extents used */
350 	xfs_log_ticket_t	t_ticket;	/* log mgr ticket */
351 	sema_t			t_sema;		/* sema for commit completion */
352 	xfs_lsn_t		t_lsn;		/* log seq num of start of
353 						 * transaction. */
354 	xfs_lsn_t		t_commit_lsn;	/* log seq num of end of
355 						 * transaction. */
356 	struct xfs_mount	*t_mountp;	/* ptr to fs mount struct */
357 	struct xfs_dquot_acct   *t_dqinfo;	/* accting info for dquots */
358 	xfs_trans_callback_t	t_callback;	/* transaction callback */
359 	void			*t_callarg;	/* callback arg */
360 	unsigned int		t_flags;	/* misc flags */
361 	long			t_icount_delta;	/* superblock icount change */
362 	long			t_ifree_delta;	/* superblock ifree change */
363 	long			t_fdblocks_delta; /* superblock fdblocks chg */
364 	long			t_res_fdblocks_delta; /* on-disk only chg */
365 	long			t_frextents_delta;/* superblock freextents chg*/
366 	long			t_res_frextents_delta; /* on-disk only chg */
367 	long			t_ag_freeblks_delta; /* debugging counter */
368 	long			t_ag_flist_delta; /* debugging counter */
369 	long			t_ag_btree_delta; /* debugging counter */
370 	long			t_dblocks_delta;/* superblock dblocks change */
371 	long			t_agcount_delta;/* superblock agcount change */
372 	long			t_imaxpct_delta;/* superblock imaxpct change */
373 	long			t_rextsize_delta;/* superblock rextsize chg */
374 	long			t_rbmblocks_delta;/* superblock rbmblocks chg */
375 	long			t_rblocks_delta;/* superblock rblocks change */
376 	long			t_rextents_delta;/* superblocks rextents chg */
377 	long			t_rextslog_delta;/* superblocks rextslog chg */
378 	unsigned int		t_items_free;	/* log item descs free */
379 	xfs_log_item_chunk_t	t_items;	/* first log item desc chunk */
380 	xfs_trans_header_t	t_header;	/* header for in-log trans */
381 	unsigned int		t_busy_free;	/* busy descs free */
382 	xfs_log_busy_chunk_t	t_busy;		/* busy/async free blocks */
383         xfs_pflags_t            t_pflags;       /* saved pflags state */
384 } xfs_trans_t;
385 
386 #endif	/* __KERNEL__ */
387 
388 
389 #define	XFS_TRANS_MAGIC		0x5452414E	/* 'TRAN' */
390 /*
391  * Values for t_flags.
392  */
393 #define	XFS_TRANS_DIRTY		0x01	/* something needs to be logged */
394 #define	XFS_TRANS_SB_DIRTY	0x02	/* superblock is modified */
395 #define	XFS_TRANS_PERM_LOG_RES	0x04	/* xact took a permanent log res */
396 #define	XFS_TRANS_SYNC		0x08	/* make commit synchronous */
397 #define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
398 #define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
399 
400 /*
401  * Values for call flags parameter.
402  */
403 #define	XFS_TRANS_NOSLEEP		0x1
404 #define	XFS_TRANS_WAIT			0x2
405 #define	XFS_TRANS_RELEASE_LOG_RES	0x4
406 #define	XFS_TRANS_ABORT			0x8
407 
408 /*
409  * Field values for xfs_trans_mod_sb.
410  */
411 #define	XFS_TRANS_SB_ICOUNT		0x00000001
412 #define	XFS_TRANS_SB_IFREE		0x00000002
413 #define	XFS_TRANS_SB_FDBLOCKS		0x00000004
414 #define	XFS_TRANS_SB_RES_FDBLOCKS	0x00000008
415 #define	XFS_TRANS_SB_FREXTENTS		0x00000010
416 #define	XFS_TRANS_SB_RES_FREXTENTS	0x00000020
417 #define	XFS_TRANS_SB_DBLOCKS		0x00000040
418 #define	XFS_TRANS_SB_AGCOUNT		0x00000080
419 #define	XFS_TRANS_SB_IMAXPCT		0x00000100
420 #define	XFS_TRANS_SB_REXTSIZE		0x00000200
421 #define	XFS_TRANS_SB_RBMBLOCKS		0x00000400
422 #define	XFS_TRANS_SB_RBLOCKS		0x00000800
423 #define	XFS_TRANS_SB_REXTENTS		0x00001000
424 #define	XFS_TRANS_SB_REXTSLOG		0x00002000
425 
426 
427 /*
428  * Various log reservation values.
429  * These are based on the size of the file system block
430  * because that is what most transactions manipulate.
431  * Each adds in an additional 128 bytes per item logged to
432  * try to account for the overhead of the transaction mechanism.
433  *
434  * Note:
435  * Most of the reservations underestimate the number of allocation
436  * groups into which they could free extents in the xfs_bmap_finish()
437  * call.  This is because the number in the worst case is quite high
438  * and quite unusual.  In order to fix this we need to change
439  * xfs_bmap_finish() to free extents in only a single AG at a time.
440  * This will require changes to the EFI code as well, however, so that
441  * the EFI for the extents not freed is logged again in each transaction.
442  * See bug 261917.
443  */
444 
445 /*
446  * Per-extent log reservation for the allocation btree changes
447  * involved in freeing or allocating an extent.
448  * 2 trees * (2 blocks/level * max depth - 1) * block size
449  */
450 #define	XFS_ALLOCFREE_LOG_RES(mp,nx) \
451 	((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
452 #define	XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
453 	((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
454 
455 /*
456  * Per-directory log reservation for any directory change.
457  * dir blocks: (1 btree block per level + data block + free block) * dblock size
458  * bmap btree: (levels + 2) * max depth * block size
459  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
460  * size, so account for that in the DAENTER macros.
461  */
462 #define	XFS_DIROP_LOG_RES(mp)	\
463 	(XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
464 	 (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
465 #define	XFS_DIROP_LOG_COUNT(mp)	\
466 	(XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
467 	 XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
468 
469 /*
470  * In a write transaction we can allocate a maximum of 2
471  * extents.  This gives:
472  *    the inode getting the new extents: inode size
473  *    the inode\'s bmap btree: max depth * block size
474  *    the agfs of the ags from which the extents are allocated: 2 * sector
475  *    the superblock free block counter: sector size
476  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
477  * And the bmap_finish transaction can free bmap blocks in a join:
478  *    the agfs of the ags containing the blocks: 2 * sector size
479  *    the agfls of the ags containing the blocks: 2 * sector size
480  *    the super block free block counter: sector size
481  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
482  */
483 #define XFS_CALC_WRITE_LOG_RES(mp) \
484 	(MAX( \
485 	 ((mp)->m_sb.sb_inodesize + \
486 	  XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
487 	  (2 * (mp)->m_sb.sb_sectsize) + \
488 	  (mp)->m_sb.sb_sectsize + \
489 	  XFS_ALLOCFREE_LOG_RES(mp, 2) + \
490 	  (128 * (4 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + XFS_ALLOCFREE_LOG_COUNT(mp, 2)))),\
491 	 ((2 * (mp)->m_sb.sb_sectsize) + \
492 	  (2 * (mp)->m_sb.sb_sectsize) + \
493 	  (mp)->m_sb.sb_sectsize + \
494 	  XFS_ALLOCFREE_LOG_RES(mp, 2) + \
495 	  (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
496 
497 #define	XFS_WRITE_LOG_RES(mp)	((mp)->m_reservations.tr_write)
498 
499 /*
500  * In truncating a file we free up to two extents at once.  We can modify:
501  *    the inode being truncated: inode size
502  *    the inode\'s bmap btree: (max depth + 1) * block size
503  * And the bmap_finish transaction can free the blocks and bmap blocks:
504  *    the agf for each of the ags: 4 * sector size
505  *    the agfl for each of the ags: 4 * sector size
506  *    the super block to reflect the freed blocks: sector size
507  *    worst case split in allocation btrees per extent assuming 4 extents:
508  *		4 exts * 2 trees * (2 * max depth - 1) * block size
509  *    the inode btree: max depth * blocksize
510  *    the allocation btrees: 2 trees * (max depth - 1) * block size
511  */
512 #define	XFS_CALC_ITRUNCATE_LOG_RES(mp) \
513 	(MAX( \
514 	 ((mp)->m_sb.sb_inodesize + \
515 	  XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + 1) + \
516 	  (128 * (2 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
517 	 ((4 * (mp)->m_sb.sb_sectsize) + \
518 	  (4 * (mp)->m_sb.sb_sectsize) + \
519 	  (mp)->m_sb.sb_sectsize + \
520 	  XFS_ALLOCFREE_LOG_RES(mp, 4) + \
521 	  (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))) + \
522 	  (128 * 5) + \
523 	  XFS_ALLOCFREE_LOG_RES(mp, 1) + \
524 	   (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
525 	    XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
526 
527 #define	XFS_ITRUNCATE_LOG_RES(mp)   ((mp)->m_reservations.tr_itruncate)
528 
529 /*
530  * In renaming a files we can modify:
531  *    the four inodes involved: 4 * inode size
532  *    the two directory btrees: 2 * (max depth + v2) * dir block size
533  *    the two directory bmap btrees: 2 * max depth * block size
534  * And the bmap_finish transaction can free dir and bmap blocks (two sets
535  *	of bmap blocks) giving:
536  *    the agf for the ags in which the blocks live: 3 * sector size
537  *    the agfl for the ags in which the blocks live: 3 * sector size
538  *    the superblock for the free block count: sector size
539  *    the allocation btrees: 3 exts * 2 trees * (2 * max depth - 1) * block size
540  */
541 #define	XFS_CALC_RENAME_LOG_RES(mp) \
542 	(MAX( \
543 	 ((4 * (mp)->m_sb.sb_inodesize) + \
544 	  (2 * XFS_DIROP_LOG_RES(mp)) + \
545 	  (128 * (4 + 2 * XFS_DIROP_LOG_COUNT(mp)))), \
546 	 ((3 * (mp)->m_sb.sb_sectsize) + \
547 	  (3 * (mp)->m_sb.sb_sectsize) + \
548 	  (mp)->m_sb.sb_sectsize + \
549 	  XFS_ALLOCFREE_LOG_RES(mp, 3) + \
550 	  (128 * (7 + XFS_ALLOCFREE_LOG_COUNT(mp, 3))))))
551 
552 #define	XFS_RENAME_LOG_RES(mp)	((mp)->m_reservations.tr_rename)
553 
554 /*
555  * For creating a link to an inode:
556  *    the parent directory inode: inode size
557  *    the linked inode: inode size
558  *    the directory btree could split: (max depth + v2) * dir block size
559  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
560  * And the bmap_finish transaction can free some bmap blocks giving:
561  *    the agf for the ag in which the blocks live: sector size
562  *    the agfl for the ag in which the blocks live: sector size
563  *    the superblock for the free block count: sector size
564  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
565  */
566 #define	XFS_CALC_LINK_LOG_RES(mp) \
567 	(MAX( \
568 	 ((mp)->m_sb.sb_inodesize + \
569 	  (mp)->m_sb.sb_inodesize + \
570 	  XFS_DIROP_LOG_RES(mp) + \
571 	  (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
572 	 ((mp)->m_sb.sb_sectsize + \
573 	  (mp)->m_sb.sb_sectsize + \
574 	  (mp)->m_sb.sb_sectsize + \
575 	  XFS_ALLOCFREE_LOG_RES(mp, 1) + \
576 	  (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
577 
578 #define	XFS_LINK_LOG_RES(mp)	((mp)->m_reservations.tr_link)
579 
580 /*
581  * For removing a directory entry we can modify:
582  *    the parent directory inode: inode size
583  *    the removed inode: inode size
584  *    the directory btree could join: (max depth + v2) * dir block size
585  *    the directory bmap btree could join or split: (max depth + v2) * blocksize
586  * And the bmap_finish transaction can free the dir and bmap blocks giving:
587  *    the agf for the ag in which the blocks live: 2 * sector size
588  *    the agfl for the ag in which the blocks live: 2 * sector size
589  *    the superblock for the free block count: sector size
590  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
591  */
592 #define	XFS_CALC_REMOVE_LOG_RES(mp)	\
593 	(MAX( \
594 	 ((mp)->m_sb.sb_inodesize + \
595 	  (mp)->m_sb.sb_inodesize + \
596 	  XFS_DIROP_LOG_RES(mp) + \
597 	  (128 * (2 + XFS_DIROP_LOG_COUNT(mp)))), \
598 	 ((2 * (mp)->m_sb.sb_sectsize) + \
599 	  (2 * (mp)->m_sb.sb_sectsize) + \
600 	  (mp)->m_sb.sb_sectsize + \
601 	  XFS_ALLOCFREE_LOG_RES(mp, 2) + \
602 	  (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
603 
604 #define	XFS_REMOVE_LOG_RES(mp)	((mp)->m_reservations.tr_remove)
605 
606 /*
607  * For symlink we can modify:
608  *    the parent directory inode: inode size
609  *    the new inode: inode size
610  *    the inode btree entry: 1 block
611  *    the directory btree: (max depth + v2) * dir block size
612  *    the directory inode\'s bmap btree: (max depth + v2) * block size
613  *    the blocks for the symlink: 1 KB
614  * Or in the first xact we allocate some inodes giving:
615  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
616  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
617  *    the inode btree: max depth * blocksize
618  *    the allocation btrees: 2 trees * (2 * max depth - 1) * block size
619  */
620 #define	XFS_CALC_SYMLINK_LOG_RES(mp)		\
621 	(MAX( \
622 	 ((mp)->m_sb.sb_inodesize + \
623 	  (mp)->m_sb.sb_inodesize + \
624 	  XFS_FSB_TO_B(mp, 1) + \
625 	  XFS_DIROP_LOG_RES(mp) + \
626 	  1024 + \
627 	  (128 * (4 + XFS_DIROP_LOG_COUNT(mp)))), \
628 	 (2 * (mp)->m_sb.sb_sectsize + \
629 	  XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
630 	  XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
631 	  XFS_ALLOCFREE_LOG_RES(mp, 1) + \
632 	  (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
633 	   XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
634 
635 #define	XFS_SYMLINK_LOG_RES(mp)	((mp)->m_reservations.tr_symlink)
636 
637 /*
638  * For create we can modify:
639  *    the parent directory inode: inode size
640  *    the new inode: inode size
641  *    the inode btree entry: block size
642  *    the superblock for the nlink flag: sector size
643  *    the directory btree: (max depth + v2) * dir block size
644  *    the directory inode\'s bmap btree: (max depth + v2) * block size
645  * Or in the first xact we allocate some inodes giving:
646  *    the agi and agf of the ag getting the new inodes: 2 * sectorsize
647  *    the superblock for the nlink flag: sector size
648  *    the inode blocks allocated: XFS_IALLOC_BLOCKS * blocksize
649  *    the inode btree: max depth * blocksize
650  *    the allocation btrees: 2 trees * (max depth - 1) * block size
651  */
652 #define	XFS_CALC_CREATE_LOG_RES(mp)		\
653 	(MAX( \
654 	 ((mp)->m_sb.sb_inodesize + \
655 	  (mp)->m_sb.sb_inodesize + \
656 	  (mp)->m_sb.sb_sectsize + \
657 	  XFS_FSB_TO_B(mp, 1) + \
658 	  XFS_DIROP_LOG_RES(mp) + \
659 	  (128 * (3 + XFS_DIROP_LOG_COUNT(mp)))), \
660 	 (3 * (mp)->m_sb.sb_sectsize + \
661 	  XFS_FSB_TO_B((mp), XFS_IALLOC_BLOCKS((mp))) + \
662 	  XFS_FSB_TO_B((mp), XFS_IN_MAXLEVELS(mp)) + \
663 	  XFS_ALLOCFREE_LOG_RES(mp, 1) + \
664 	  (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
665 	   XFS_ALLOCFREE_LOG_COUNT(mp, 1))))))
666 
667 #define	XFS_CREATE_LOG_RES(mp)	((mp)->m_reservations.tr_create)
668 
669 /*
670  * Making a new directory is the same as creating a new file.
671  */
672 #define	XFS_CALC_MKDIR_LOG_RES(mp)	XFS_CALC_CREATE_LOG_RES(mp)
673 
674 #define	XFS_MKDIR_LOG_RES(mp)	((mp)->m_reservations.tr_mkdir)
675 
676 /*
677  * In freeing an inode we can modify:
678  *    the inode being freed: inode size
679  *    the super block free inode counter: sector size
680  *    the agi hash list and counters: sector size
681  *    the inode btree entry: block size
682  *    the on disk inode before ours in the agi hash list: inode cluster size
683  *    the inode btree: max depth * blocksize
684  *    the allocation btrees: 2 trees * (max depth - 1) * block size
685  */
686 #define	XFS_CALC_IFREE_LOG_RES(mp) \
687 	((mp)->m_sb.sb_inodesize + \
688 	 (mp)->m_sb.sb_sectsize + \
689 	 (mp)->m_sb.sb_sectsize + \
690 	 XFS_FSB_TO_B((mp), 1) + \
691 	 MAX((__uint16_t)XFS_FSB_TO_B((mp), 1), XFS_INODE_CLUSTER_SIZE(mp)) + \
692 	 (128 * 5) + \
693 	  XFS_ALLOCFREE_LOG_RES(mp, 1) + \
694 	  (128 * (2 + XFS_IALLOC_BLOCKS(mp) + XFS_IN_MAXLEVELS(mp) + \
695 	   XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
696 
697 
698 #define	XFS_IFREE_LOG_RES(mp)	((mp)->m_reservations.tr_ifree)
699 
700 /*
701  * When only changing the inode we log the inode and possibly the superblock
702  * We also add a bit of slop for the transaction stuff.
703  */
704 #define	XFS_CALC_ICHANGE_LOG_RES(mp)	((mp)->m_sb.sb_inodesize + \
705 					 (mp)->m_sb.sb_sectsize + 512)
706 
707 #define	XFS_ICHANGE_LOG_RES(mp)	((mp)->m_reservations.tr_ichange)
708 
709 /*
710  * Growing the data section of the filesystem.
711  *	superblock
712  *	agi and agf
713  *	allocation btrees
714  */
715 #define	XFS_CALC_GROWDATA_LOG_RES(mp) \
716 	((mp)->m_sb.sb_sectsize * 3 + \
717 	 XFS_ALLOCFREE_LOG_RES(mp, 1) + \
718 	 (128 * (3 + XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
719 
720 #define	XFS_GROWDATA_LOG_RES(mp)    ((mp)->m_reservations.tr_growdata)
721 
722 /*
723  * Growing the rt section of the filesystem.
724  * In the first set of transactions (ALLOC) we allocate space to the
725  * bitmap or summary files.
726  *	superblock: sector size
727  *	agf of the ag from which the extent is allocated: sector size
728  *	bmap btree for bitmap/summary inode: max depth * blocksize
729  *	bitmap/summary inode: inode size
730  *	allocation btrees for 1 block alloc: 2 * (2 * maxdepth - 1) * blocksize
731  */
732 #define	XFS_CALC_GROWRTALLOC_LOG_RES(mp) \
733 	(2 * (mp)->m_sb.sb_sectsize + \
734 	 XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)) + \
735 	 (mp)->m_sb.sb_inodesize + \
736 	 XFS_ALLOCFREE_LOG_RES(mp, 1) + \
737 	 (128 * \
738 	  (3 + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK) + \
739 	   XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
740 
741 #define	XFS_GROWRTALLOC_LOG_RES(mp)	((mp)->m_reservations.tr_growrtalloc)
742 
743 /*
744  * Growing the rt section of the filesystem.
745  * In the second set of transactions (ZERO) we zero the new metadata blocks.
746  *	one bitmap/summary block: blocksize
747  */
748 #define	XFS_CALC_GROWRTZERO_LOG_RES(mp) \
749 	((mp)->m_sb.sb_blocksize + 128)
750 
751 #define	XFS_GROWRTZERO_LOG_RES(mp)	((mp)->m_reservations.tr_growrtzero)
752 
753 /*
754  * Growing the rt section of the filesystem.
755  * In the third set of transactions (FREE) we update metadata without
756  * allocating any new blocks.
757  *	superblock: sector size
758  *	bitmap inode: inode size
759  *	summary inode: inode size
760  *	one bitmap block: blocksize
761  *	summary blocks: new summary size
762  */
763 #define	XFS_CALC_GROWRTFREE_LOG_RES(mp) \
764 	((mp)->m_sb.sb_sectsize + \
765 	 2 * (mp)->m_sb.sb_inodesize + \
766 	 (mp)->m_sb.sb_blocksize + \
767 	 (mp)->m_rsumsize + \
768 	 (128 * 5))
769 
770 #define	XFS_GROWRTFREE_LOG_RES(mp)	((mp)->m_reservations.tr_growrtfree)
771 
772 /*
773  * Logging the inode modification timestamp on a synchronous write.
774  *	inode
775  */
776 #define	XFS_CALC_SWRITE_LOG_RES(mp) \
777 	((mp)->m_sb.sb_inodesize + 128)
778 
779 #define	XFS_SWRITE_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)
780 
781 /*
782  * Logging the inode timestamps on an fsync -- same as SWRITE
783  * as long as SWRITE logs the entire inode core
784  */
785 #define XFS_FSYNC_TS_LOG_RES(mp)        ((mp)->m_reservations.tr_swrite)
786 
787 /*
788  * Logging the inode mode bits when writing a setuid/setgid file
789  *	inode
790  */
791 #define	XFS_CALC_WRITEID_LOG_RES(mp) \
792 	((mp)->m_sb.sb_inodesize + 128)
793 
794 #define	XFS_WRITEID_LOG_RES(mp)	((mp)->m_reservations.tr_swrite)
795 
796 /*
797  * Converting the inode from non-attributed to attributed.
798  *	the inode being converted: inode size
799  *	agf block and superblock (for block allocation)
800  *	the new block (directory sized)
801  *	bmap blocks for the new directory block
802  *	allocation btrees
803  */
804 #define	XFS_CALC_ADDAFORK_LOG_RES(mp)	\
805 	((mp)->m_sb.sb_inodesize + \
806 	 (mp)->m_sb.sb_sectsize * 2 + \
807 	 (mp)->m_dirblksize + \
808 	 (XFS_DIR_IS_V1(mp) ? 0 : \
809 	    XFS_FSB_TO_B(mp, (XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1))) + \
810 	 XFS_ALLOCFREE_LOG_RES(mp, 1) + \
811 	 (128 * (4 + \
812 		 (XFS_DIR_IS_V1(mp) ? 0 : \
813 			 XFS_DAENTER_BMAP1B(mp, XFS_DATA_FORK) + 1) + \
814 		 XFS_ALLOCFREE_LOG_COUNT(mp, 1))))
815 
816 #define	XFS_ADDAFORK_LOG_RES(mp)	((mp)->m_reservations.tr_addafork)
817 
818 /*
819  * Removing the attribute fork of a file
820  *    the inode being truncated: inode size
821  *    the inode\'s bmap btree: max depth * block size
822  * And the bmap_finish transaction can free the blocks and bmap blocks:
823  *    the agf for each of the ags: 4 * sector size
824  *    the agfl for each of the ags: 4 * sector size
825  *    the super block to reflect the freed blocks: sector size
826  *    worst case split in allocation btrees per extent assuming 4 extents:
827  *		4 exts * 2 trees * (2 * max depth - 1) * block size
828  */
829 #define	XFS_CALC_ATTRINVAL_LOG_RES(mp)	\
830 	(MAX( \
831 	 ((mp)->m_sb.sb_inodesize + \
832 	  XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
833 	  (128 * (1 + XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))), \
834 	 ((4 * (mp)->m_sb.sb_sectsize) + \
835 	  (4 * (mp)->m_sb.sb_sectsize) + \
836 	  (mp)->m_sb.sb_sectsize + \
837 	  XFS_ALLOCFREE_LOG_RES(mp, 4) + \
838 	  (128 * (9 + XFS_ALLOCFREE_LOG_COUNT(mp, 4))))))
839 
840 #define	XFS_ATTRINVAL_LOG_RES(mp)	((mp)->m_reservations.tr_attrinval)
841 
842 /*
843  * Setting an attribute.
844  *	the inode getting the attribute
845  *	the superblock for allocations
846  *	the agfs extents are allocated from
847  *	the attribute btree * max depth
848  *	the inode allocation btree
849  * Since attribute transaction space is dependent on the size of the attribute,
850  * the calculation is done partially at mount time and partially at runtime.
851  */
852 #define	XFS_CALC_ATTRSET_LOG_RES(mp)	\
853 	((mp)->m_sb.sb_inodesize + \
854 	 (mp)->m_sb.sb_sectsize + \
855 	  XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
856 	  (128 * (2 + XFS_DA_NODE_MAXDEPTH)))
857 
858 #define	XFS_ATTRSET_LOG_RES(mp, ext)	\
859 	((mp)->m_reservations.tr_attrset + \
860 	 (ext * (mp)->m_sb.sb_sectsize) + \
861 	 (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
862 	 (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
863 
864 /*
865  * Removing an attribute.
866  *    the inode: inode size
867  *    the attribute btree could join: max depth * block size
868  *    the inode bmap btree could join or split: max depth * block size
869  * And the bmap_finish transaction can free the attr blocks freed giving:
870  *    the agf for the ag in which the blocks live: 2 * sector size
871  *    the agfl for the ag in which the blocks live: 2 * sector size
872  *    the superblock for the free block count: sector size
873  *    the allocation btrees: 2 exts * 2 trees * (2 * max depth - 1) * block size
874  */
875 #define	XFS_CALC_ATTRRM_LOG_RES(mp)	\
876 	(MAX( \
877 	  ((mp)->m_sb.sb_inodesize + \
878 	  XFS_FSB_TO_B((mp), XFS_DA_NODE_MAXDEPTH) + \
879 	  XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)) + \
880 	  (128 * (1 + XFS_DA_NODE_MAXDEPTH + XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK)))), \
881 	 ((2 * (mp)->m_sb.sb_sectsize) + \
882 	  (2 * (mp)->m_sb.sb_sectsize) + \
883 	  (mp)->m_sb.sb_sectsize + \
884 	  XFS_ALLOCFREE_LOG_RES(mp, 2) + \
885 	  (128 * (5 + XFS_ALLOCFREE_LOG_COUNT(mp, 2))))))
886 
887 #define	XFS_ATTRRM_LOG_RES(mp)	((mp)->m_reservations.tr_attrrm)
888 
889 /*
890  * Clearing a bad agino number in an agi hash bucket.
891  */
892 #define	XFS_CALC_CLEAR_AGI_BUCKET_LOG_RES(mp) \
893 	((mp)->m_sb.sb_sectsize + 128)
894 
895 #define	XFS_CLEAR_AGI_BUCKET_LOG_RES(mp)  ((mp)->m_reservations.tr_clearagi)
896 
897 
898 /*
899  * Various log count values.
900  */
901 #define	XFS_DEFAULT_LOG_COUNT		1
902 #define	XFS_DEFAULT_PERM_LOG_COUNT	2
903 #define	XFS_ITRUNCATE_LOG_COUNT		2
904 #define XFS_INACTIVE_LOG_COUNT		2
905 #define	XFS_CREATE_LOG_COUNT		2
906 #define	XFS_MKDIR_LOG_COUNT		3
907 #define	XFS_SYMLINK_LOG_COUNT		3
908 #define	XFS_REMOVE_LOG_COUNT		2
909 #define	XFS_LINK_LOG_COUNT		2
910 #define	XFS_RENAME_LOG_COUNT		2
911 #define	XFS_WRITE_LOG_COUNT		2
912 #define	XFS_ADDAFORK_LOG_COUNT		2
913 #define	XFS_ATTRINVAL_LOG_COUNT		1
914 #define	XFS_ATTRSET_LOG_COUNT		3
915 #define	XFS_ATTRRM_LOG_COUNT		3
916 
917 /*
918  * Here we centralize the specification of XFS meta-data buffer
919  * reference count values.  This determine how hard the buffer
920  * cache tries to hold onto the buffer.
921  */
922 #define	XFS_AGF_REF		4
923 #define	XFS_AGI_REF		4
924 #define	XFS_AGFL_REF		3
925 #define	XFS_INO_BTREE_REF	3
926 #define	XFS_ALLOC_BTREE_REF	2
927 #define	XFS_BMAP_BTREE_REF	2
928 #define	XFS_DIR_BTREE_REF	2
929 #define	XFS_ATTR_BTREE_REF	1
930 #define	XFS_INO_REF		1
931 #define	XFS_DQUOT_REF		1
932 
933 #ifdef __KERNEL__
934 /*
935  * XFS transaction mechanism exported interfaces that are
936  * actually macros.
937  */
938 #define	xfs_trans_get_log_res(tp)	((tp)->t_log_res)
939 #define	xfs_trans_get_log_count(tp)	((tp)->t_log_count)
940 #define	xfs_trans_get_block_res(tp)	((tp)->t_blk_res)
941 #define	xfs_trans_set_sync(tp)		((tp)->t_flags |= XFS_TRANS_SYNC)
942 
943 #ifdef DEBUG
944 #define	xfs_trans_agblocks_delta(tp, d)	((tp)->t_ag_freeblks_delta += (long)d)
945 #define	xfs_trans_agflist_delta(tp, d)	((tp)->t_ag_flist_delta += (long)d)
946 #define	xfs_trans_agbtree_delta(tp, d)	((tp)->t_ag_btree_delta += (long)d)
947 #else
948 #define	xfs_trans_agblocks_delta(tp, d)
949 #define	xfs_trans_agflist_delta(tp, d)
950 #define	xfs_trans_agbtree_delta(tp, d)
951 #endif
952 
953 /*
954  * XFS transaction mechanism exported interfaces.
955  */
956 void		xfs_trans_init(struct xfs_mount *);
957 xfs_trans_t	*xfs_trans_alloc(struct xfs_mount *, uint);
958 xfs_trans_t	*_xfs_trans_alloc(struct xfs_mount *, uint);
959 xfs_trans_t	*xfs_trans_dup(xfs_trans_t *);
960 int		xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
961 				  uint, uint);
962 void		xfs_trans_mod_sb(xfs_trans_t *, uint, long);
963 struct xfs_buf	*xfs_trans_get_buf(xfs_trans_t *, struct xfs_buftarg *, xfs_daddr_t,
964 				   int, uint);
965 int		xfs_trans_read_buf(struct xfs_mount *, xfs_trans_t *,
966 				   struct xfs_buftarg *, xfs_daddr_t, int, uint,
967 				   struct xfs_buf **);
968 struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
969 
970 void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
971 void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
972 void		xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
973 void		xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
974 void		xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
975 void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
976 void		xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
977 void		xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
978 void		xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
979 void		xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
980 int		xfs_trans_iget(struct xfs_mount *, xfs_trans_t *,
981 			       xfs_ino_t , uint, uint, struct xfs_inode **);
982 void		xfs_trans_ijoin(xfs_trans_t *, struct xfs_inode *, uint);
983 void		xfs_trans_ihold(xfs_trans_t *, struct xfs_inode *);
984 void		xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
985 void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
986 struct xfs_efi_log_item	*xfs_trans_get_efi(xfs_trans_t *, uint);
987 void		xfs_efi_release(struct xfs_efi_log_item *, uint);
988 void		xfs_trans_log_efi_extent(xfs_trans_t *,
989 					 struct xfs_efi_log_item *,
990 					 xfs_fsblock_t,
991 					 xfs_extlen_t);
992 struct xfs_efd_log_item	*xfs_trans_get_efd(xfs_trans_t *,
993 				  struct xfs_efi_log_item *,
994 				  uint);
995 void		xfs_trans_log_efd_extent(xfs_trans_t *,
996 					 struct xfs_efd_log_item *,
997 					 xfs_fsblock_t,
998 					 xfs_extlen_t);
999 int		_xfs_trans_commit(xfs_trans_t *,
1000 				  uint flags,
1001 				  xfs_lsn_t *,
1002 				  int *);
1003 #define xfs_trans_commit(tp, flags, lsn) \
1004 	_xfs_trans_commit(tp, flags, lsn, NULL)
1005 void		xfs_trans_cancel(xfs_trans_t *, int);
1006 void		xfs_trans_ail_init(struct xfs_mount *);
1007 xfs_lsn_t	xfs_trans_push_ail(struct xfs_mount *, xfs_lsn_t);
1008 xfs_lsn_t	xfs_trans_tail_ail(struct xfs_mount *);
1009 void		xfs_trans_unlocked_item(struct xfs_mount *,
1010 					xfs_log_item_t *);
1011 xfs_log_busy_slot_t *xfs_trans_add_busy(xfs_trans_t *tp,
1012 					xfs_agnumber_t ag,
1013 					xfs_extlen_t idx);
1014 
1015 #endif	/* __KERNEL__ */
1016 
1017 #endif	/* __XFS_TRANS_H__ */
1018