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xfs_trans.h
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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 #define XFS_TRANS_FREEZE_PROT 0x40 /* Transaction has elevated writer
183  count in superblock */
184 
185 /*
186  * Values for call flags parameter.
187  */
188 #define XFS_TRANS_RELEASE_LOG_RES 0x4
189 #define XFS_TRANS_ABORT 0x8
190 
191 /*
192  * Field values for xfs_trans_mod_sb.
193  */
194 #define XFS_TRANS_SB_ICOUNT 0x00000001
195 #define XFS_TRANS_SB_IFREE 0x00000002
196 #define XFS_TRANS_SB_FDBLOCKS 0x00000004
197 #define XFS_TRANS_SB_RES_FDBLOCKS 0x00000008
198 #define XFS_TRANS_SB_FREXTENTS 0x00000010
199 #define XFS_TRANS_SB_RES_FREXTENTS 0x00000020
200 #define XFS_TRANS_SB_DBLOCKS 0x00000040
201 #define XFS_TRANS_SB_AGCOUNT 0x00000080
202 #define XFS_TRANS_SB_IMAXPCT 0x00000100
203 #define XFS_TRANS_SB_REXTSIZE 0x00000200
204 #define XFS_TRANS_SB_RBMBLOCKS 0x00000400
205 #define XFS_TRANS_SB_RBLOCKS 0x00000800
206 #define XFS_TRANS_SB_REXTENTS 0x00001000
207 #define XFS_TRANS_SB_REXTSLOG 0x00002000
208 
209 
210 /*
211  * Per-extent log reservation for the allocation btree changes
212  * involved in freeing or allocating an extent.
213  * 2 trees * (2 blocks/level * max depth - 1) * block size
214  */
215 #define XFS_ALLOCFREE_LOG_RES(mp,nx) \
216  ((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
217 #define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
218  ((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
219 
220 /*
221  * Per-directory log reservation for any directory change.
222  * dir blocks: (1 btree block per level + data block + free block) * dblock size
223  * bmap btree: (levels + 2) * max depth * block size
224  * v2 directory blocks can be fragmented below the dirblksize down to the fsb
225  * size, so account for that in the DAENTER macros.
226  */
227 #define XFS_DIROP_LOG_RES(mp) \
228  (XFS_FSB_TO_B(mp, XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK)) + \
229  (XFS_FSB_TO_B(mp, XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)))
230 #define XFS_DIROP_LOG_COUNT(mp) \
231  (XFS_DAENTER_BLOCKS(mp, XFS_DATA_FORK) + \
232  XFS_DAENTER_BMAPS(mp, XFS_DATA_FORK) + 1)
233 
234 
235 #define XFS_WRITE_LOG_RES(mp) ((mp)->m_reservations.tr_write)
236 #define XFS_ITRUNCATE_LOG_RES(mp) ((mp)->m_reservations.tr_itruncate)
237 #define XFS_RENAME_LOG_RES(mp) ((mp)->m_reservations.tr_rename)
238 #define XFS_LINK_LOG_RES(mp) ((mp)->m_reservations.tr_link)
239 #define XFS_REMOVE_LOG_RES(mp) ((mp)->m_reservations.tr_remove)
240 #define XFS_SYMLINK_LOG_RES(mp) ((mp)->m_reservations.tr_symlink)
241 #define XFS_CREATE_LOG_RES(mp) ((mp)->m_reservations.tr_create)
242 #define XFS_MKDIR_LOG_RES(mp) ((mp)->m_reservations.tr_mkdir)
243 #define XFS_IFREE_LOG_RES(mp) ((mp)->m_reservations.tr_ifree)
244 #define XFS_ICHANGE_LOG_RES(mp) ((mp)->m_reservations.tr_ichange)
245 #define XFS_GROWDATA_LOG_RES(mp) ((mp)->m_reservations.tr_growdata)
246 #define XFS_GROWRTALLOC_LOG_RES(mp) ((mp)->m_reservations.tr_growrtalloc)
247 #define XFS_GROWRTZERO_LOG_RES(mp) ((mp)->m_reservations.tr_growrtzero)
248 #define XFS_GROWRTFREE_LOG_RES(mp) ((mp)->m_reservations.tr_growrtfree)
249 #define XFS_SWRITE_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
250 /*
251  * Logging the inode timestamps on an fsync -- same as SWRITE
252  * as long as SWRITE logs the entire inode core
253  */
254 #define XFS_FSYNC_TS_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
255 #define XFS_WRITEID_LOG_RES(mp) ((mp)->m_reservations.tr_swrite)
256 #define XFS_ADDAFORK_LOG_RES(mp) ((mp)->m_reservations.tr_addafork)
257 #define XFS_ATTRINVAL_LOG_RES(mp) ((mp)->m_reservations.tr_attrinval)
258 #define XFS_ATTRSET_LOG_RES(mp, ext) \
259  ((mp)->m_reservations.tr_attrset + \
260  (ext * (mp)->m_sb.sb_sectsize) + \
261  (ext * XFS_FSB_TO_B((mp), XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK))) + \
262  (128 * (ext + (ext * XFS_BM_MAXLEVELS(mp, XFS_ATTR_FORK)))))
263 #define XFS_ATTRRM_LOG_RES(mp) ((mp)->m_reservations.tr_attrrm)
264 #define XFS_CLEAR_AGI_BUCKET_LOG_RES(mp) ((mp)->m_reservations.tr_clearagi)
265 
266 
267 /*
268  * Various log count values.
269  */
270 #define XFS_DEFAULT_LOG_COUNT 1
271 #define XFS_DEFAULT_PERM_LOG_COUNT 2
272 #define XFS_ITRUNCATE_LOG_COUNT 2
273 #define XFS_INACTIVE_LOG_COUNT 2
274 #define XFS_CREATE_LOG_COUNT 2
275 #define XFS_MKDIR_LOG_COUNT 3
276 #define XFS_SYMLINK_LOG_COUNT 3
277 #define XFS_REMOVE_LOG_COUNT 2
278 #define XFS_LINK_LOG_COUNT 2
279 #define XFS_RENAME_LOG_COUNT 2
280 #define XFS_WRITE_LOG_COUNT 2
281 #define XFS_ADDAFORK_LOG_COUNT 2
282 #define XFS_ATTRINVAL_LOG_COUNT 1
283 #define XFS_ATTRSET_LOG_COUNT 3
284 #define XFS_ATTRRM_LOG_COUNT 3
285 
286 /*
287  * Here we centralize the specification of XFS meta-data buffer
288  * reference count values. This determine how hard the buffer
289  * cache tries to hold onto the buffer.
290  */
291 #define XFS_AGF_REF 4
292 #define XFS_AGI_REF 4
293 #define XFS_AGFL_REF 3
294 #define XFS_INO_BTREE_REF 3
295 #define XFS_ALLOC_BTREE_REF 2
296 #define XFS_BMAP_BTREE_REF 2
297 #define XFS_DIR_BTREE_REF 2
298 #define XFS_INO_REF 2
299 #define XFS_ATTR_BTREE_REF 1
300 #define XFS_DQUOT_REF 1
301 
302 #ifdef __KERNEL__
303 
304 struct xfs_buf;
305 struct xfs_buftarg;
306 struct xfs_efd_log_item;
307 struct xfs_efi_log_item;
308 struct xfs_inode;
309 struct xfs_item_ops;
310 struct xfs_log_iovec;
311 struct xfs_log_item_desc;
312 struct xfs_mount;
313 struct xfs_trans;
314 struct xfs_dquot_acct;
315 struct xfs_busy_extent;
316 
317 typedef struct xfs_log_item {
318  struct list_head li_ail; /* AIL pointers */
319  xfs_lsn_t li_lsn; /* last on-disk lsn */
320  struct xfs_log_item_desc *li_desc; /* ptr to current desc*/
321  struct xfs_mount *li_mountp; /* ptr to fs mount */
322  struct xfs_ail *li_ailp; /* ptr to AIL */
323  uint li_type; /* item type */
324  uint li_flags; /* misc flags */
325  struct xfs_log_item *li_bio_list; /* buffer item list */
326  void (*li_cb)(struct xfs_buf *,
327  struct xfs_log_item *);
328  /* buffer item iodone */
329  /* callback func */
330  const struct xfs_item_ops *li_ops; /* function list */
331 
332  /* delayed logging */
333  struct list_head li_cil; /* CIL pointers */
334  struct xfs_log_vec *li_lv; /* active log vector */
335  xfs_lsn_t li_seq; /* CIL commit seq */
336 } xfs_log_item_t;
337 
338 #define XFS_LI_IN_AIL 0x1
339 #define XFS_LI_ABORTED 0x2
340 
341 #define XFS_LI_FLAGS \
342  { XFS_LI_IN_AIL, "IN_AIL" }, \
343  { XFS_LI_ABORTED, "ABORTED" }
344 
345 struct xfs_item_ops {
346  uint (*iop_size)(xfs_log_item_t *);
347  void (*iop_format)(xfs_log_item_t *, struct xfs_log_iovec *);
348  void (*iop_pin)(xfs_log_item_t *);
349  void (*iop_unpin)(xfs_log_item_t *, int remove);
350  uint (*iop_push)(struct xfs_log_item *, struct list_head *);
351  void (*iop_unlock)(xfs_log_item_t *);
352  xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_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_PUSH(ip, list) (*(ip)->li_ops->iop_push)(ip, list)
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_COMMITTING(ip, lsn) (*(ip)->li_ops->iop_committing)(ip, lsn)
364 
365 /*
366  * Return values for the IOP_PUSH() routines.
367  */
368 #define XFS_ITEM_SUCCESS 0
369 #define XFS_ITEM_PINNED 1
370 #define XFS_ITEM_LOCKED 2
371 #define XFS_ITEM_FLUSHING 3
372 
373 /*
374  * This is the type of function which can be given to xfs_trans_callback()
375  * to be called upon the transaction's commit to disk.
376  */
377 typedef void (*xfs_trans_callback_t)(struct xfs_trans *, void *);
378 
379 /*
380  * This is the structure maintained for every active transaction.
381  */
382 typedef struct xfs_trans {
383  unsigned int t_magic; /* magic number */
384  xfs_log_callback_t t_logcb; /* log callback struct */
385  unsigned int t_type; /* transaction type */
386  unsigned int t_log_res; /* amt of log space resvd */
387  unsigned int t_log_count; /* count for perm log res */
388  unsigned int t_blk_res; /* # of blocks resvd */
389  unsigned int t_blk_res_used; /* # of resvd blocks used */
390  unsigned int t_rtx_res; /* # of rt extents resvd */
391  unsigned int t_rtx_res_used; /* # of resvd rt extents used */
392  struct xlog_ticket *t_ticket; /* log mgr ticket */
393  xfs_lsn_t t_lsn; /* log seq num of start of
394  * transaction. */
395  xfs_lsn_t t_commit_lsn; /* log seq num of end of
396  * transaction. */
397  struct xfs_mount *t_mountp; /* ptr to fs mount struct */
398  struct xfs_dquot_acct *t_dqinfo; /* acctg info for dquots */
399  unsigned int t_flags; /* misc flags */
400  int64_t t_icount_delta; /* superblock icount change */
401  int64_t t_ifree_delta; /* superblock ifree change */
402  int64_t t_fdblocks_delta; /* superblock fdblocks chg */
403  int64_t t_res_fdblocks_delta; /* on-disk only chg */
404  int64_t t_frextents_delta;/* superblock freextents chg*/
405  int64_t t_res_frextents_delta; /* on-disk only chg */
406 #ifdef DEBUG
407  int64_t t_ag_freeblks_delta; /* debugging counter */
408  int64_t t_ag_flist_delta; /* debugging counter */
409  int64_t t_ag_btree_delta; /* debugging counter */
410 #endif
411  int64_t t_dblocks_delta;/* superblock dblocks change */
412  int64_t t_agcount_delta;/* superblock agcount change */
413  int64_t t_imaxpct_delta;/* superblock imaxpct change */
414  int64_t t_rextsize_delta;/* superblock rextsize chg */
415  int64_t t_rbmblocks_delta;/* superblock rbmblocks chg */
416  int64_t t_rblocks_delta;/* superblock rblocks change */
417  int64_t t_rextents_delta;/* superblocks rextents chg */
418  int64_t t_rextslog_delta;/* superblocks rextslog chg */
419  struct list_head t_items; /* log item descriptors */
420  xfs_trans_header_t t_header; /* header for in-log trans */
421  struct list_head t_busy; /* list of busy extents */
422  unsigned long t_pflags; /* saved process flags state */
423 } xfs_trans_t;
424 
425 /*
426  * XFS transaction mechanism exported interfaces that are
427  * actually macros.
428  */
429 #define xfs_trans_get_log_res(tp) ((tp)->t_log_res)
430 #define xfs_trans_get_log_count(tp) ((tp)->t_log_count)
431 #define xfs_trans_get_block_res(tp) ((tp)->t_blk_res)
432 #define xfs_trans_set_sync(tp) ((tp)->t_flags |= XFS_TRANS_SYNC)
433 
434 #ifdef DEBUG
435 #define xfs_trans_agblocks_delta(tp, d) ((tp)->t_ag_freeblks_delta += (int64_t)d)
436 #define xfs_trans_agflist_delta(tp, d) ((tp)->t_ag_flist_delta += (int64_t)d)
437 #define xfs_trans_agbtree_delta(tp, d) ((tp)->t_ag_btree_delta += (int64_t)d)
438 #else
439 #define xfs_trans_agblocks_delta(tp, d)
440 #define xfs_trans_agflist_delta(tp, d)
441 #define xfs_trans_agbtree_delta(tp, d)
442 #endif
443 
444 /*
445  * XFS transaction mechanism exported interfaces.
446  */
447 xfs_trans_t *xfs_trans_alloc(struct xfs_mount *, uint);
448 xfs_trans_t *_xfs_trans_alloc(struct xfs_mount *, uint, xfs_km_flags_t);
449 xfs_trans_t *xfs_trans_dup(xfs_trans_t *);
450 int xfs_trans_reserve(xfs_trans_t *, uint, uint, uint,
451  uint, uint);
452 void xfs_trans_mod_sb(xfs_trans_t *, uint, int64_t);
453 
454 struct xfs_buf *xfs_trans_get_buf_map(struct xfs_trans *tp,
455  struct xfs_buftarg *target,
456  struct xfs_buf_map *map, int nmaps,
457  uint flags);
458 
459 static inline struct xfs_buf *
460 xfs_trans_get_buf(
461  struct xfs_trans *tp,
462  struct xfs_buftarg *target,
463  xfs_daddr_t blkno,
464  int numblks,
465  uint flags)
466 {
467  struct xfs_buf_map map = {
468  .bm_bn = blkno,
469  .bm_len = numblks,
470  };
471  return xfs_trans_get_buf_map(tp, target, &map, 1, flags);
472 }
473 
474 int xfs_trans_read_buf_map(struct xfs_mount *mp,
475  struct xfs_trans *tp,
476  struct xfs_buftarg *target,
477  struct xfs_buf_map *map, int nmaps,
478  xfs_buf_flags_t flags,
479  struct xfs_buf **bpp);
480 
481 static inline int
482 xfs_trans_read_buf(
483  struct xfs_mount *mp,
484  struct xfs_trans *tp,
485  struct xfs_buftarg *target,
486  xfs_daddr_t blkno,
487  int numblks,
488  xfs_buf_flags_t flags,
489  struct xfs_buf **bpp)
490 {
491  struct xfs_buf_map map = {
492  .bm_bn = blkno,
493  .bm_len = numblks,
494  };
495  return xfs_trans_read_buf_map(mp, tp, target, &map, 1, flags, bpp);
496 }
497 
498 struct xfs_buf *xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
499 
500 void xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
501 void xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
502 void xfs_trans_bhold(xfs_trans_t *, struct xfs_buf *);
503 void xfs_trans_bhold_release(xfs_trans_t *, struct xfs_buf *);
504 void xfs_trans_binval(xfs_trans_t *, struct xfs_buf *);
505 void xfs_trans_inode_buf(xfs_trans_t *, struct xfs_buf *);
506 void xfs_trans_stale_inode_buf(xfs_trans_t *, struct xfs_buf *);
507 void xfs_trans_dquot_buf(xfs_trans_t *, struct xfs_buf *, uint);
508 void xfs_trans_inode_alloc_buf(xfs_trans_t *, struct xfs_buf *);
509 void xfs_trans_ichgtime(struct xfs_trans *, struct xfs_inode *, int);
510 void xfs_trans_ijoin(struct xfs_trans *, struct xfs_inode *, uint);
511 void xfs_trans_log_buf(xfs_trans_t *, struct xfs_buf *, uint, uint);
512 void xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
513 struct xfs_efi_log_item *xfs_trans_get_efi(xfs_trans_t *, uint);
514 void xfs_efi_release(struct xfs_efi_log_item *, uint);
515 void xfs_trans_log_efi_extent(xfs_trans_t *,
516  struct xfs_efi_log_item *,
517  xfs_fsblock_t,
518  xfs_extlen_t);
519 struct xfs_efd_log_item *xfs_trans_get_efd(xfs_trans_t *,
520  struct xfs_efi_log_item *,
521  uint);
522 void xfs_trans_log_efd_extent(xfs_trans_t *,
523  struct xfs_efd_log_item *,
524  xfs_fsblock_t,
525  xfs_extlen_t);
526 int xfs_trans_commit(xfs_trans_t *, uint flags);
527 void xfs_trans_cancel(xfs_trans_t *, int);
528 int xfs_trans_ail_init(struct xfs_mount *);
529 void xfs_trans_ail_destroy(struct xfs_mount *);
530 
531 extern kmem_zone_t *xfs_trans_zone;
532 extern kmem_zone_t *xfs_log_item_desc_zone;
533 
534 #endif /* __KERNEL__ */
535 
536 void xfs_trans_init(struct xfs_mount *);
537 int xfs_trans_roll(struct xfs_trans **, struct xfs_inode *);
538 
539 #endif /* __XFS_TRANS_H__ */
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