2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
32 #ifndef __XFS_LOG_PRIV_H__
33 #define __XFS_LOG_PRIV_H__
39 struct xfs_buf_cancel;
43 * Macros, structures, prototypes for internal log manager use.
46 #define XLOG_MIN_ICLOGS 2
47 #define XLOG_MED_ICLOGS 4
48 #define XLOG_MAX_ICLOGS 8
49 #define XLOG_CALLBACK_SIZE 10
50 #define XLOG_HEADER_MAGIC_NUM 0xFEEDbabe /* Invalid cycle number */
51 #define XLOG_VERSION_1 1
52 #define XLOG_VERSION_2 2 /* Large IClogs, Log sunit */
53 #define XLOG_VERSION_OKBITS (XLOG_VERSION_1 | XLOG_VERSION_2)
54 #define XLOG_RECORD_BSIZE (16*1024) /* eventually 32k */
55 #define XLOG_BIG_RECORD_BSIZE (32*1024) /* 32k buffers */
56 #define XLOG_MAX_RECORD_BSIZE (256*1024)
57 #define XLOG_HEADER_CYCLE_SIZE (32*1024) /* cycle data in header */
58 #define XLOG_RECORD_BSHIFT 14 /* 16384 == 1 << 14 */
59 #define XLOG_BIG_RECORD_BSHIFT 15 /* 32k == 1 << 15 */
60 #define XLOG_MAX_RECORD_BSHIFT 18 /* 256k == 1 << 18 */
61 #define XLOG_BTOLSUNIT(log, b) (((b)+(log)->l_mp->m_sb.sb_logsunit-1) / \
62 (log)->l_mp->m_sb.sb_logsunit)
63 #define XLOG_LSUNITTOB(log, su) ((su) * (log)->l_mp->m_sb.sb_logsunit)
65 #define XLOG_HEADER_SIZE 512
67 #define XLOG_REC_SHIFT(log) \
68 BTOBB(1 << (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? \
69 XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT))
70 #define XLOG_TOTAL_REC_SHIFT(log) \
71 BTOBB(XLOG_MAX_ICLOGS << (XFS_SB_VERSION_HASLOGV2(&log->l_mp->m_sb) ? \
72 XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT))
78 #define ASSIGN_ANY_LSN_HOST(lsn,cycle,block) \
80 (lsn) = ((xfs_lsn_t)(cycle)<<32)|(block); \
82 #define ASSIGN_ANY_LSN_DISK(lsn,cycle,block) \
84 INT_SET(((uint *)&(lsn))[0], ARCH_CONVERT, (cycle)); \
85 INT_SET(((uint *)&(lsn))[1], ARCH_CONVERT, (block)); \
87 #define ASSIGN_LSN(lsn,log) \
88 ASSIGN_ANY_LSN_DISK(lsn,(log)->l_curr_cycle,(log)->l_curr_block);
90 #define XLOG_SET(f,b) (((f) & (b)) == (b))
92 #define GET_CYCLE(ptr, arch) \
93 (INT_GET(*(uint *)(ptr), arch) == XLOG_HEADER_MAGIC_NUM ? \
94 INT_GET(*((uint *)(ptr)+1), arch) : \
95 INT_GET(*(uint *)(ptr), arch) \
98 #define BLK_AVG(blk1, blk2) ((blk1+blk2) >> 1)
104 * get client id from packed copy.
106 * this hack is here because the xlog_pack code copies four bytes
107 * of xlog_op_header containing the fields oh_clientid, oh_flags
108 * and oh_res2 into the packed copy.
110 * later on this four byte chunk is treated as an int and the
111 * client id is pulled out.
113 * this has endian issues, of course.
116 #ifndef XFS_NATIVE_HOST
117 #define GET_CLIENT_ID(i,arch) \
120 #define GET_CLIENT_ID(i,arch) \
124 #define GRANT_LOCK(log) mutex_spinlock(&(log)->l_grant_lock)
125 #define GRANT_UNLOCK(log, s) mutex_spinunlock(&(log)->l_grant_lock, s)
126 #define LOG_LOCK(log) mutex_spinlock(&(log)->l_icloglock)
127 #define LOG_UNLOCK(log, s) mutex_spinunlock(&(log)->l_icloglock, s)
129 #define xlog_panic(args...) cmn_err(CE_PANIC, ## args)
130 #define xlog_exit(args...) cmn_err(CE_PANIC, ## args)
131 #define xlog_warn(args...) cmn_err(CE_WARN, ## args)
136 #define XLOG_STATE_ACTIVE 0x0001 /* Current IC log being written to */
137 #define XLOG_STATE_WANT_SYNC 0x0002 /* Want to sync this iclog; no more writes */
138 #define XLOG_STATE_SYNCING 0x0004 /* This IC log is syncing */
139 #define XLOG_STATE_DONE_SYNC 0x0008 /* Done syncing to disk */
140 #define XLOG_STATE_DO_CALLBACK \
141 0x0010 /* Process callback functions */
142 #define XLOG_STATE_CALLBACK 0x0020 /* Callback functions now */
143 #define XLOG_STATE_DIRTY 0x0040 /* Dirty IC log, not ready for ACTIVE status*/
144 #define XLOG_STATE_IOERROR 0x0080 /* IO error happened in sync'ing log */
145 #define XLOG_STATE_ALL 0x7FFF /* All possible valid flags */
146 #define XLOG_STATE_NOTUSED 0x8000 /* This IC log not being used */
147 #endif /* __KERNEL__ */
150 * Flags to log operation header
152 * The first write of a new transaction will be preceded with a start
153 * record, XLOG_START_TRANS. Once a transaction is committed, a commit
154 * record is written, XLOG_COMMIT_TRANS. If a single region can not fit into
155 * the remainder of the current active in-core log, it is split up into
156 * multiple regions. Each partial region will be marked with a
157 * XLOG_CONTINUE_TRANS until the last one, which gets marked with XLOG_END_TRANS.
160 #define XLOG_START_TRANS 0x01 /* Start a new transaction */
161 #define XLOG_COMMIT_TRANS 0x02 /* Commit this transaction */
162 #define XLOG_CONTINUE_TRANS 0x04 /* Cont this trans into new region */
163 #define XLOG_WAS_CONT_TRANS 0x08 /* Cont this trans into new region */
164 #define XLOG_END_TRANS 0x10 /* End a continued transaction */
165 #define XLOG_UNMOUNT_TRANS 0x20 /* Unmount a filesystem transaction */
166 #define XLOG_SKIP_TRANS (XLOG_COMMIT_TRANS | XLOG_CONTINUE_TRANS | \
167 XLOG_WAS_CONT_TRANS | XLOG_END_TRANS | \
172 * Flags to log ticket
174 #define XLOG_TIC_INITED 0x1 /* has been initialized */
175 #define XLOG_TIC_PERM_RESERV 0x2 /* permanent reservation */
176 #define XLOG_TIC_IN_Q 0x4
177 #endif /* __KERNEL__ */
179 #define XLOG_UNMOUNT_TYPE 0x556e /* Un for Unmount */
182 * Flags for log structure
184 #define XLOG_CHKSUM_MISMATCH 0x1 /* used only during recovery */
185 #define XLOG_ACTIVE_RECOVERY 0x2 /* in the middle of recovery */
186 #define XLOG_RECOVERY_NEEDED 0x4 /* log was recovered */
187 #define XLOG_IO_ERROR 0x8 /* log hit an I/O error, and being
189 typedef __uint32_t xlog_tid_t;
194 * Below are states for covering allocation transactions.
195 * By covering, we mean changing the h_tail_lsn in the last on-disk
196 * log write such that no allocation transactions will be re-done during
197 * recovery after a system crash. Recovery starts at the last on-disk
200 * These states are used to insert dummy log entries to cover
201 * space allocation transactions which can undo non-transactional changes
202 * after a crash. Writes to a file with space
203 * already allocated do not result in any transactions. Allocations
204 * might include space beyond the EOF. So if we just push the EOF a
205 * little, the last transaction for the file could contain the wrong
206 * size. If there is no file system activity, after an allocation
207 * transaction, and the system crashes, the allocation transaction
208 * will get replayed and the file will be truncated. This could
209 * be hours/days/... after the allocation occurred.
211 * The fix for this is to do two dummy transactions when the
212 * system is idle. We need two dummy transaction because the h_tail_lsn
213 * in the log record header needs to point beyond the last possible
214 * non-dummy transaction. The first dummy changes the h_tail_lsn to
215 * the first transaction before the dummy. The second dummy causes
216 * h_tail_lsn to point to the first dummy. Recovery starts at h_tail_lsn.
218 * These dummy transactions get committed when everything
219 * is idle (after there has been some activity).
221 * There are 5 states used to control this.
223 * IDLE -- no logging has been done on the file system or
224 * we are done covering previous transactions.
225 * NEED -- logging has occurred and we need a dummy transaction
226 * when the log becomes idle.
227 * DONE -- we were in the NEED state and have committed a dummy
229 * NEED2 -- we detected that a dummy transaction has gone to the
230 * on disk log with no other transactions.
231 * DONE2 -- we committed a dummy transaction when in the NEED2 state.
233 * There are two places where we switch states:
235 * 1.) In xfs_sync, when we detect an idle log and are in NEED or NEED2.
236 * We commit the dummy transaction and switch to DONE or DONE2,
237 * respectively. In all other states, we don't do anything.
239 * 2.) When we finish writing the on-disk log (xlog_state_clean_log).
241 * No matter what state we are in, if this isn't the dummy
242 * transaction going out, the next state is NEED.
243 * So, if we aren't in the DONE or DONE2 states, the next state
244 * is NEED. We can't be finishing a write of the dummy record
245 * unless it was committed and the state switched to DONE or DONE2.
247 * If we are in the DONE state and this was a write of the
248 * dummy transaction, we move to NEED2.
250 * If we are in the DONE2 state and this was a write of the
251 * dummy transaction, we move to IDLE.
254 * Writing only one dummy transaction can get appended to
255 * one file space allocation. When this happens, the log recovery
256 * code replays the space allocation and a file could be truncated.
257 * This is why we have the NEED2 and DONE2 states before going idle.
260 #define XLOG_STATE_COVER_IDLE 0
261 #define XLOG_STATE_COVER_NEED 1
262 #define XLOG_STATE_COVER_DONE 2
263 #define XLOG_STATE_COVER_NEED2 3
264 #define XLOG_STATE_COVER_DONE2 4
266 #define XLOG_COVER_OPS 5
269 /* Ticket reservation region accounting */
270 #if defined(XFS_LOG_RES_DEBUG)
271 #define XLOG_TIC_LEN_MAX 15
272 #define XLOG_TIC_RESET_RES(t) ((t)->t_res_num = \
273 (t)->t_res_arr_sum = (t)->t_res_num_ophdrs = 0)
274 #define XLOG_TIC_ADD_OPHDR(t) ((t)->t_res_num_ophdrs++)
275 #define XLOG_TIC_ADD_REGION(t, len, type) \
277 if ((t)->t_res_num == XLOG_TIC_LEN_MAX) { \
278 /* add to overflow and start again */ \
279 (t)->t_res_o_flow += (t)->t_res_arr_sum; \
280 (t)->t_res_num = 0; \
281 (t)->t_res_arr_sum = 0; \
283 (t)->t_res_arr[(t)->t_res_num].r_len = (len); \
284 (t)->t_res_arr[(t)->t_res_num].r_type = (type); \
285 (t)->t_res_arr_sum += (len); \
291 * As would be stored in xfs_log_iovec but without the i_addr which
292 * we don't care about.
294 typedef struct xlog_res {
299 #define XLOG_TIC_RESET_RES(t)
300 #define XLOG_TIC_ADD_OPHDR(t)
301 #define XLOG_TIC_ADD_REGION(t, len, type)
305 typedef struct xlog_ticket {
306 sv_t t_sema; /* sleep on this semaphore : 20 */
307 struct xlog_ticket *t_next; /* :4|8 */
308 struct xlog_ticket *t_prev; /* :4|8 */
309 xlog_tid_t t_tid; /* transaction identifier : 4 */
310 int t_curr_res; /* current reservation in bytes : 4 */
311 int t_unit_res; /* unit reservation in bytes : 4 */
312 char t_ocnt; /* original count : 1 */
313 char t_cnt; /* current count : 1 */
314 char t_clientid; /* who does this belong to; : 1 */
315 char t_flags; /* properties of reservation : 1 */
316 uint t_trans_type; /* transaction type : 4 */
318 #if defined (XFS_LOG_RES_DEBUG)
319 /* reservation array fields */
320 uint t_res_num; /* num in array : 4 */
321 xlog_res_t t_res_arr[XLOG_TIC_LEN_MAX]; /* array of res : X */
322 uint t_res_num_ophdrs; /* num op hdrs : 4 */
323 uint t_res_arr_sum; /* array sum : 4 */
324 uint t_res_o_flow; /* sum overflow : 4 */
331 typedef struct xlog_op_header {
332 xlog_tid_t oh_tid; /* transaction id of operation : 4 b */
333 int oh_len; /* bytes in data region : 4 b */
334 __uint8_t oh_clientid; /* who sent me this : 1 b */
335 __uint8_t oh_flags; /* : 1 b */
336 ushort oh_res2; /* 32 bit align : 2 b */
340 /* valid values for h_fmt */
341 #define XLOG_FMT_UNKNOWN 0
342 #define XLOG_FMT_LINUX_LE 1
343 #define XLOG_FMT_LINUX_BE 2
344 #define XLOG_FMT_IRIX_BE 3
347 #ifdef XFS_NATIVE_HOST
348 #define XLOG_FMT XLOG_FMT_LINUX_BE
350 #define XLOG_FMT XLOG_FMT_LINUX_LE
353 typedef struct xlog_rec_header {
354 uint h_magicno; /* log record (LR) identifier : 4 */
355 uint h_cycle; /* write cycle of log : 4 */
356 int h_version; /* LR version : 4 */
357 int h_len; /* len in bytes; should be 64-bit aligned: 4 */
358 xfs_lsn_t h_lsn; /* lsn of this LR : 8 */
359 xfs_lsn_t h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */
360 uint h_chksum; /* may not be used; non-zero if used : 4 */
361 int h_prev_block; /* block number to previous LR : 4 */
362 int h_num_logops; /* number of log operations in this LR : 4 */
363 uint h_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE];
365 int h_fmt; /* format of log record : 4 */
366 uuid_t h_fs_uuid; /* uuid of FS : 16 */
367 int h_size; /* iclog size : 4 */
370 typedef struct xlog_rec_ext_header {
371 uint xh_cycle; /* write cycle of log : 4 */
372 uint xh_cycle_data[XLOG_HEADER_CYCLE_SIZE / BBSIZE]; /* : 256 */
373 } xlog_rec_ext_header_t;
377 * - A log record header is 512 bytes. There is plenty of room to grow the
378 * xlog_rec_header_t into the reserved space.
379 * - ic_data follows, so a write to disk can start at the beginning of
381 * - ic_forcesema is used to implement synchronous forcing of the iclog to disk.
382 * - ic_next is the pointer to the next iclog in the ring.
383 * - ic_bp is a pointer to the buffer used to write this incore log to disk.
384 * - ic_log is a pointer back to the global log structure.
385 * - ic_callback is a linked list of callback function/argument pairs to be
386 * called after an iclog finishes writing.
387 * - ic_size is the full size of the header plus data.
388 * - ic_offset is the current number of bytes written to in this iclog.
389 * - ic_refcnt is bumped when someone is writing to the log.
390 * - ic_state is the state of the iclog.
392 typedef struct xlog_iclog_fields {
395 struct xlog_in_core *ic_next;
396 struct xlog_in_core *ic_prev;
397 struct xfs_buf *ic_bp;
399 xfs_log_callback_t *ic_callback;
400 xfs_log_callback_t **ic_callback_tail;
402 struct ktrace *ic_trace;
409 char *ic_datap; /* pointer to iclog data */
410 } xlog_iclog_fields_t;
412 typedef union xlog_in_core2 {
413 xlog_rec_header_t hic_header;
414 xlog_rec_ext_header_t hic_xheader;
415 char hic_sector[XLOG_HEADER_SIZE];
418 typedef struct xlog_in_core {
419 xlog_iclog_fields_t hic_fields;
420 xlog_in_core_2_t *hic_data;
424 * Defines to save our code from this glop.
426 #define ic_forcesema hic_fields.ic_forcesema
427 #define ic_writesema hic_fields.ic_writesema
428 #define ic_next hic_fields.ic_next
429 #define ic_prev hic_fields.ic_prev
430 #define ic_bp hic_fields.ic_bp
431 #define ic_log hic_fields.ic_log
432 #define ic_callback hic_fields.ic_callback
433 #define ic_callback_tail hic_fields.ic_callback_tail
434 #define ic_trace hic_fields.ic_trace
435 #define ic_size hic_fields.ic_size
436 #define ic_offset hic_fields.ic_offset
437 #define ic_refcnt hic_fields.ic_refcnt
438 #define ic_bwritecnt hic_fields.ic_bwritecnt
439 #define ic_state hic_fields.ic_state
440 #define ic_datap hic_fields.ic_datap
441 #define ic_header hic_data->hic_header
444 * The reservation head lsn is not made up of a cycle number and block number.
445 * Instead, it uses a cycle number and byte number. Logs don't expect to
446 * overflow 31 bits worth of byte offset, so using a byte number will mean
447 * that round off problems won't occur when releasing partial reservations.
450 /* The following block of fields are changed while holding icloglock */
451 sema_t l_flushsema; /* iclog flushing semaphore */
452 int l_flushcnt; /* # of procs waiting on this
454 int l_ticket_cnt; /* free ticket count */
455 int l_ticket_tcnt; /* total ticket count */
456 int l_covered_state;/* state of "covering disk
458 xlog_ticket_t *l_freelist; /* free list of tickets */
459 xlog_ticket_t *l_unmount_free;/* kmem_free these addresses */
460 xlog_ticket_t *l_tail; /* free list of tickets */
461 xlog_in_core_t *l_iclog; /* head log queue */
462 lock_t l_icloglock; /* grab to change iclog state */
463 xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed
465 xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */
466 struct xfs_mount *l_mp; /* mount point */
467 struct xfs_buf *l_xbuf; /* extra buffer for log
469 struct xfs_buftarg *l_targ; /* buftarg of log */
470 xfs_daddr_t l_logBBstart; /* start block of log */
471 int l_logsize; /* size of log in bytes */
472 int l_logBBsize; /* size of log in BB chunks */
473 int l_curr_cycle; /* Cycle number of log writes */
474 int l_prev_cycle; /* Cycle number before last
476 int l_curr_block; /* current logical log block */
477 int l_prev_block; /* previous logical log block */
478 int l_iclog_size; /* size of log in bytes */
479 int l_iclog_size_log; /* log power size of log */
480 int l_iclog_bufs; /* number of iclog buffers */
482 /* The following field are used for debugging; need to hold icloglock */
483 char *l_iclog_bak[XLOG_MAX_ICLOGS];
485 /* The following block of fields are changed while holding grant_lock */
487 xlog_ticket_t *l_reserve_headq;
488 xlog_ticket_t *l_write_headq;
489 int l_grant_reserve_cycle;
490 int l_grant_reserve_bytes;
491 int l_grant_write_cycle;
492 int l_grant_write_bytes;
494 /* The following fields don't need locking */
496 struct ktrace *l_trace;
497 struct ktrace *l_grant_trace;
500 uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */
501 struct xfs_buf_cancel **l_buf_cancel_table;
502 int l_iclog_hsize; /* size of iclog header */
503 int l_iclog_heads; /* # of iclog header sectors */
504 uint l_sectbb_log; /* log2 of sector size in BBs */
505 uint l_sectbb_mask; /* sector size (in BBs)
509 #define XLOG_GRANT_SUB_SPACE(log,bytes,type) \
510 xlog_grant_sub_space(log,bytes,type)
511 static inline void xlog_grant_sub_space(struct log *log, int bytes, int type)
514 (log)->l_grant_write_bytes -= (bytes); \
515 if ((log)->l_grant_write_bytes < 0) { \
516 (log)->l_grant_write_bytes += (log)->l_logsize; \
517 (log)->l_grant_write_cycle--; \
520 (log)->l_grant_reserve_bytes -= (bytes); \
521 if ((log)->l_grant_reserve_bytes < 0) { \
522 (log)->l_grant_reserve_bytes += (log)->l_logsize;\
523 (log)->l_grant_reserve_cycle--; \
528 #define XLOG_GRANT_ADD_SPACE(log,bytes,type) \
529 xlog_grant_add_space(log,bytes,type)
531 xlog_grant_add_space(struct log *log, int bytes, int type)
534 (log)->l_grant_write_bytes += (bytes); \
535 if ((log)->l_grant_write_bytes > (log)->l_logsize) { \
536 (log)->l_grant_write_bytes -= (log)->l_logsize; \
537 (log)->l_grant_write_cycle++; \
540 (log)->l_grant_reserve_bytes += (bytes); \
541 if ((log)->l_grant_reserve_bytes > (log)->l_logsize) { \
542 (log)->l_grant_reserve_bytes -= (log)->l_logsize;\
543 (log)->l_grant_reserve_cycle++; \
548 #define XLOG_INS_TICKETQ(q, tic) xlog_ins_ticketq(q, tic)
550 xlog_ins_ticketq(struct xlog_ticket *q, struct xlog_ticket *tic)
553 (tic)->t_next = (q); \
554 (tic)->t_prev = (q)->t_prev; \
555 (q)->t_prev->t_next = (tic); \
556 (q)->t_prev = (tic); \
558 (tic)->t_prev = (tic)->t_next = (tic); \
561 (tic)->t_flags |= XLOG_TIC_IN_Q; \
564 #define XLOG_DEL_TICKETQ(q, tic) xlog_del_ticketq(q, tic)
566 xlog_del_ticketq(struct xlog_ticket *q, struct xlog_ticket *tic)
568 if ((tic) == (tic)->t_next) { \
571 (q) = (tic)->t_next; \
572 (tic)->t_next->t_prev = (tic)->t_prev; \
573 (tic)->t_prev->t_next = (tic)->t_next; \
575 (tic)->t_next = (tic)->t_prev = NULL; \
576 (tic)->t_flags &= ~XLOG_TIC_IN_Q; \
579 /* common routines */
580 extern xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
581 extern int xlog_find_tail(xlog_t *log,
582 xfs_daddr_t *head_blk,
583 xfs_daddr_t *tail_blk,
585 extern int xlog_recover(xlog_t *log, int readonly);
586 extern int xlog_recover_finish(xlog_t *log, int mfsi_flags);
587 extern void xlog_pack_data(xlog_t *log, xlog_in_core_t *iclog, int);
588 extern void xlog_recover_process_iunlinks(xlog_t *log);
590 extern struct xfs_buf *xlog_get_bp(xlog_t *, int);
591 extern void xlog_put_bp(struct xfs_buf *);
592 extern int xlog_bread(xlog_t *, xfs_daddr_t, int, struct xfs_buf *);
595 #define XLOG_TRACE_GRAB_FLUSH 1
596 #define XLOG_TRACE_REL_FLUSH 2
597 #define XLOG_TRACE_SLEEP_FLUSH 3
598 #define XLOG_TRACE_WAKE_FLUSH 4
600 #endif /* __KERNEL__ */
602 #endif /* __XFS_LOG_PRIV_H__ */