blob: bb8b661bcc5055aeb63796b1bbcc47c309608019 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) International Business Machines Corp., 2000-2005
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
Dave Kleikamp63f83c92006-10-02 09:55:27 -05007 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * (at your option) any later version.
Dave Kleikamp63f83c92006-10-02 09:55:27 -05009 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
Dave Kleikamp63f83c92006-10-02 09:55:27 -050016 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -050021 * jfs_txnmgr.c: transaction manager
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 *
23 * notes:
24 * transaction starts with txBegin() and ends with txCommit()
25 * or txAbort().
26 *
27 * tlock is acquired at the time of update;
28 * (obviate scan at commit time for xtree and dtree)
29 * tlock and mp points to each other;
30 * (no hashlist for mp -> tlock).
31 *
32 * special cases:
33 * tlock on in-memory inode:
34 * in-place tlock in the in-memory inode itself;
35 * converted to page lock by iWrite() at commit time.
36 *
37 * tlock during write()/mmap() under anonymous transaction (tid = 0):
38 * transferred (?) to transaction at commit time.
39 *
40 * use the page itself to update allocation maps
41 * (obviate intermediate replication of allocation/deallocation data)
42 * hold on to mp+lock thru update of maps
43 */
44
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/fs.h>
46#include <linux/vmalloc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070047#include <linux/completion.h>
Nigel Cunningham7dfb7102006-12-06 20:34:23 -080048#include <linux/freezer.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <linux/module.h>
50#include <linux/moduleparam.h>
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -060051#include <linux/kthread.h>
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -050052#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#include "jfs_incore.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050054#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070055#include "jfs_filsys.h"
56#include "jfs_metapage.h"
57#include "jfs_dinode.h"
58#include "jfs_imap.h"
59#include "jfs_dmap.h"
60#include "jfs_superblock.h"
61#include "jfs_debug.h"
62
63/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -050064 * transaction management structures
Linus Torvalds1da177e2005-04-16 15:20:36 -070065 */
66static struct {
67 int freetid; /* index of a free tid structure */
68 int freelock; /* index first free lock word */
69 wait_queue_head_t freewait; /* eventlist of free tblock */
70 wait_queue_head_t freelockwait; /* eventlist of free tlock */
71 wait_queue_head_t lowlockwait; /* eventlist of ample tlocks */
72 int tlocksInUse; /* Number of tlocks in use */
73 spinlock_t LazyLock; /* synchronize sync_queue & unlock_queue */
74/* struct tblock *sync_queue; * Transactions waiting for data sync */
75 struct list_head unlock_queue; /* Txns waiting to be released */
76 struct list_head anon_list; /* inodes having anonymous txns */
77 struct list_head anon_list2; /* inodes having anonymous txns
78 that couldn't be sync'ed */
79} TxAnchor;
80
81int jfs_tlocks_low; /* Indicates low number of available tlocks */
82
83#ifdef CONFIG_JFS_STATISTICS
84static struct {
85 uint txBegin;
86 uint txBegin_barrier;
87 uint txBegin_lockslow;
88 uint txBegin_freetid;
89 uint txBeginAnon;
90 uint txBeginAnon_barrier;
91 uint txBeginAnon_lockslow;
92 uint txLockAlloc;
93 uint txLockAlloc_freelock;
94} TxStat;
95#endif
96
97static int nTxBlock = -1; /* number of transaction blocks */
98module_param(nTxBlock, int, 0);
99MODULE_PARM_DESC(nTxBlock,
100 "Number of transaction blocks (max:65536)");
101
102static int nTxLock = -1; /* number of transaction locks */
103module_param(nTxLock, int, 0);
104MODULE_PARM_DESC(nTxLock,
105 "Number of transaction locks (max:65536)");
106
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500107struct tblock *TxBlock; /* transaction block table */
108static int TxLockLWM; /* Low water mark for number of txLocks used */
109static int TxLockHWM; /* High water mark for number of txLocks used */
110static int TxLockVHWM; /* Very High water mark */
111struct tlock *TxLock; /* transaction lock table */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500114 * transaction management lock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 */
116static DEFINE_SPINLOCK(jfsTxnLock);
117
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500118#define TXN_LOCK() spin_lock(&jfsTxnLock)
119#define TXN_UNLOCK() spin_unlock(&jfsTxnLock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121#define LAZY_LOCK_INIT() spin_lock_init(&TxAnchor.LazyLock);
122#define LAZY_LOCK(flags) spin_lock_irqsave(&TxAnchor.LazyLock, flags)
123#define LAZY_UNLOCK(flags) spin_unlock_irqrestore(&TxAnchor.LazyLock, flags)
124
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600125static DECLARE_WAIT_QUEUE_HEAD(jfs_commit_thread_wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126static int jfs_commit_thread_waking;
127
128/*
129 * Retry logic exist outside these macros to protect from spurrious wakeups.
130 */
131static inline void TXN_SLEEP_DROP_LOCK(wait_queue_head_t * event)
132{
133 DECLARE_WAITQUEUE(wait, current);
134
135 add_wait_queue(event, &wait);
136 set_current_state(TASK_UNINTERRUPTIBLE);
137 TXN_UNLOCK();
Dave Kleikamp4aa0d232007-01-17 21:18:35 -0600138 io_schedule();
Milind Arun Choudhary3cbb1c82007-04-26 07:30:29 -0500139 __set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 remove_wait_queue(event, &wait);
141}
142
143#define TXN_SLEEP(event)\
144{\
145 TXN_SLEEP_DROP_LOCK(event);\
146 TXN_LOCK();\
147}
148
149#define TXN_WAKEUP(event) wake_up_all(event)
150
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500152 * statistics
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 */
154static struct {
155 tid_t maxtid; /* 4: biggest tid ever used */
156 lid_t maxlid; /* 4: biggest lid ever used */
157 int ntid; /* 4: # of transactions performed */
158 int nlid; /* 4: # of tlocks acquired */
159 int waitlock; /* 4: # of tlock wait */
160} stattx;
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162/*
163 * forward references
164 */
165static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
166 struct tlock * tlck, struct commit * cd);
167static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
168 struct tlock * tlck);
169static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
170 struct tlock * tlck);
171static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
172 struct tlock * tlck);
173static void txAllocPMap(struct inode *ip, struct maplock * maplock,
174 struct tblock * tblk);
175static void txForce(struct tblock * tblk);
176static int txLog(struct jfs_log * log, struct tblock * tblk,
177 struct commit * cd);
178static void txUpdateMap(struct tblock * tblk);
179static void txRelease(struct tblock * tblk);
180static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
181 struct tlock * tlck);
182static void LogSyncRelease(struct metapage * mp);
183
184/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500185 * transaction block/lock management
186 * ---------------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 */
188
189/*
190 * Get a transaction lock from the free list. If the number in use is
191 * greater than the high water mark, wake up the sync daemon. This should
192 * free some anonymous transaction locks. (TXN_LOCK must be held.)
193 */
194static lid_t txLockAlloc(void)
195{
196 lid_t lid;
197
198 INCREMENT(TxStat.txLockAlloc);
199 if (!TxAnchor.freelock) {
200 INCREMENT(TxStat.txLockAlloc_freelock);
201 }
202
203 while (!(lid = TxAnchor.freelock))
204 TXN_SLEEP(&TxAnchor.freelockwait);
205 TxAnchor.freelock = TxLock[lid].next;
206 HIGHWATERMARK(stattx.maxlid, lid);
207 if ((++TxAnchor.tlocksInUse > TxLockHWM) && (jfs_tlocks_low == 0)) {
208 jfs_info("txLockAlloc tlocks low");
209 jfs_tlocks_low = 1;
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -0600210 wake_up_process(jfsSyncThread);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 }
212
213 return lid;
214}
215
216static void txLockFree(lid_t lid)
217{
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600218 TxLock[lid].tid = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 TxLock[lid].next = TxAnchor.freelock;
220 TxAnchor.freelock = lid;
221 TxAnchor.tlocksInUse--;
222 if (jfs_tlocks_low && (TxAnchor.tlocksInUse < TxLockLWM)) {
223 jfs_info("txLockFree jfs_tlocks_low no more");
224 jfs_tlocks_low = 0;
225 TXN_WAKEUP(&TxAnchor.lowlockwait);
226 }
227 TXN_WAKEUP(&TxAnchor.freelockwait);
228}
229
230/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500231 * NAME: txInit()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500233 * FUNCTION: initialize transaction management structures
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 *
235 * RETURN:
236 *
237 * serialization: single thread at jfs_init()
238 */
239int txInit(void)
240{
241 int k, size;
242 struct sysinfo si;
243
244 /* Set defaults for nTxLock and nTxBlock if unset */
245
246 if (nTxLock == -1) {
247 if (nTxBlock == -1) {
248 /* Base default on memory size */
249 si_meminfo(&si);
250 if (si.totalram > (256 * 1024)) /* 1 GB */
251 nTxLock = 64 * 1024;
252 else
253 nTxLock = si.totalram >> 2;
254 } else if (nTxBlock > (8 * 1024))
255 nTxLock = 64 * 1024;
256 else
257 nTxLock = nTxBlock << 3;
258 }
259 if (nTxBlock == -1)
260 nTxBlock = nTxLock >> 3;
261
262 /* Verify tunable parameters */
263 if (nTxBlock < 16)
264 nTxBlock = 16; /* No one should set it this low */
265 if (nTxBlock > 65536)
266 nTxBlock = 65536;
267 if (nTxLock < 256)
268 nTxLock = 256; /* No one should set it this low */
269 if (nTxLock > 65536)
270 nTxLock = 65536;
271
272 printk(KERN_INFO "JFS: nTxBlock = %d, nTxLock = %d\n",
273 nTxBlock, nTxLock);
274 /*
275 * initialize transaction block (tblock) table
276 *
277 * transaction id (tid) = tblock index
278 * tid = 0 is reserved.
279 */
280 TxLockLWM = (nTxLock * 4) / 10;
281 TxLockHWM = (nTxLock * 7) / 10;
282 TxLockVHWM = (nTxLock * 8) / 10;
283
284 size = sizeof(struct tblock) * nTxBlock;
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700285 TxBlock = vmalloc(size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (TxBlock == NULL)
287 return -ENOMEM;
288
289 for (k = 1; k < nTxBlock - 1; k++) {
290 TxBlock[k].next = k + 1;
291 init_waitqueue_head(&TxBlock[k].gcwait);
292 init_waitqueue_head(&TxBlock[k].waitor);
293 }
294 TxBlock[k].next = 0;
295 init_waitqueue_head(&TxBlock[k].gcwait);
296 init_waitqueue_head(&TxBlock[k].waitor);
297
298 TxAnchor.freetid = 1;
299 init_waitqueue_head(&TxAnchor.freewait);
300
301 stattx.maxtid = 1; /* statistics */
302
303 /*
304 * initialize transaction lock (tlock) table
305 *
306 * transaction lock id = tlock index
307 * tlock id = 0 is reserved.
308 */
309 size = sizeof(struct tlock) * nTxLock;
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700310 TxLock = vmalloc(size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 if (TxLock == NULL) {
312 vfree(TxBlock);
313 return -ENOMEM;
314 }
315
316 /* initialize tlock table */
317 for (k = 1; k < nTxLock - 1; k++)
318 TxLock[k].next = k + 1;
319 TxLock[k].next = 0;
320 init_waitqueue_head(&TxAnchor.freelockwait);
321 init_waitqueue_head(&TxAnchor.lowlockwait);
322
323 TxAnchor.freelock = 1;
324 TxAnchor.tlocksInUse = 0;
325 INIT_LIST_HEAD(&TxAnchor.anon_list);
326 INIT_LIST_HEAD(&TxAnchor.anon_list2);
327
328 LAZY_LOCK_INIT();
329 INIT_LIST_HEAD(&TxAnchor.unlock_queue);
330
331 stattx.maxlid = 1; /* statistics */
332
333 return 0;
334}
335
336/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500337 * NAME: txExit()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500339 * FUNCTION: clean up when module is unloaded
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 */
341void txExit(void)
342{
343 vfree(TxLock);
344 TxLock = NULL;
345 vfree(TxBlock);
346 TxBlock = NULL;
347}
348
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500350 * NAME: txBegin()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500352 * FUNCTION: start a transaction.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500354 * PARAMETER: sb - superblock
355 * flag - force for nested tx;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 *
357 * RETURN: tid - transaction id
358 *
359 * note: flag force allows to start tx for nested tx
360 * to prevent deadlock on logsync barrier;
361 */
362tid_t txBegin(struct super_block *sb, int flag)
363{
364 tid_t t;
365 struct tblock *tblk;
366 struct jfs_log *log;
367
368 jfs_info("txBegin: flag = 0x%x", flag);
369 log = JFS_SBI(sb)->log;
370
371 TXN_LOCK();
372
373 INCREMENT(TxStat.txBegin);
374
375 retry:
376 if (!(flag & COMMIT_FORCE)) {
377 /*
378 * synchronize with logsync barrier
379 */
380 if (test_bit(log_SYNCBARRIER, &log->flag) ||
381 test_bit(log_QUIESCE, &log->flag)) {
382 INCREMENT(TxStat.txBegin_barrier);
383 TXN_SLEEP(&log->syncwait);
384 goto retry;
385 }
386 }
387 if (flag == 0) {
388 /*
389 * Don't begin transaction if we're getting starved for tlocks
390 * unless COMMIT_FORCE or COMMIT_INODE (which may ultimately
391 * free tlocks)
392 */
393 if (TxAnchor.tlocksInUse > TxLockVHWM) {
394 INCREMENT(TxStat.txBegin_lockslow);
395 TXN_SLEEP(&TxAnchor.lowlockwait);
396 goto retry;
397 }
398 }
399
400 /*
401 * allocate transaction id/block
402 */
403 if ((t = TxAnchor.freetid) == 0) {
404 jfs_info("txBegin: waiting for free tid");
405 INCREMENT(TxStat.txBegin_freetid);
406 TXN_SLEEP(&TxAnchor.freewait);
407 goto retry;
408 }
409
410 tblk = tid_to_tblock(t);
411
412 if ((tblk->next == 0) && !(flag & COMMIT_FORCE)) {
413 /* Don't let a non-forced transaction take the last tblk */
414 jfs_info("txBegin: waiting for free tid");
415 INCREMENT(TxStat.txBegin_freetid);
416 TXN_SLEEP(&TxAnchor.freewait);
417 goto retry;
418 }
419
420 TxAnchor.freetid = tblk->next;
421
422 /*
423 * initialize transaction
424 */
425
426 /*
427 * We can't zero the whole thing or we screw up another thread being
428 * awakened after sleeping on tblk->waitor
429 *
430 * memset(tblk, 0, sizeof(struct tblock));
431 */
432 tblk->next = tblk->last = tblk->xflag = tblk->flag = tblk->lsn = 0;
433
434 tblk->sb = sb;
435 ++log->logtid;
436 tblk->logtid = log->logtid;
437
438 ++log->active;
439
440 HIGHWATERMARK(stattx.maxtid, t); /* statistics */
441 INCREMENT(stattx.ntid); /* statistics */
442
443 TXN_UNLOCK();
444
445 jfs_info("txBegin: returning tid = %d", t);
446
447 return t;
448}
449
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500451 * NAME: txBeginAnon()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500453 * FUNCTION: start an anonymous transaction.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 * Blocks if logsync or available tlocks are low to prevent
455 * anonymous tlocks from depleting supply.
456 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500457 * PARAMETER: sb - superblock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 *
459 * RETURN: none
460 */
461void txBeginAnon(struct super_block *sb)
462{
463 struct jfs_log *log;
464
465 log = JFS_SBI(sb)->log;
466
467 TXN_LOCK();
468 INCREMENT(TxStat.txBeginAnon);
469
470 retry:
471 /*
472 * synchronize with logsync barrier
473 */
474 if (test_bit(log_SYNCBARRIER, &log->flag) ||
475 test_bit(log_QUIESCE, &log->flag)) {
476 INCREMENT(TxStat.txBeginAnon_barrier);
477 TXN_SLEEP(&log->syncwait);
478 goto retry;
479 }
480
481 /*
482 * Don't begin transaction if we're getting starved for tlocks
483 */
484 if (TxAnchor.tlocksInUse > TxLockVHWM) {
485 INCREMENT(TxStat.txBeginAnon_lockslow);
486 TXN_SLEEP(&TxAnchor.lowlockwait);
487 goto retry;
488 }
489 TXN_UNLOCK();
490}
491
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500493 * txEnd()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 *
495 * function: free specified transaction block.
496 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500497 * logsync barrier processing:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 *
499 * serialization:
500 */
501void txEnd(tid_t tid)
502{
503 struct tblock *tblk = tid_to_tblock(tid);
504 struct jfs_log *log;
505
506 jfs_info("txEnd: tid = %d", tid);
507 TXN_LOCK();
508
509 /*
510 * wakeup transactions waiting on the page locked
511 * by the current transaction
512 */
513 TXN_WAKEUP(&tblk->waitor);
514
515 log = JFS_SBI(tblk->sb)->log;
516
517 /*
518 * Lazy commit thread can't free this guy until we mark it UNLOCKED,
519 * otherwise, we would be left with a transaction that may have been
520 * reused.
521 *
522 * Lazy commit thread will turn off tblkGC_LAZY before calling this
523 * routine.
524 */
525 if (tblk->flag & tblkGC_LAZY) {
526 jfs_info("txEnd called w/lazy tid: %d, tblk = 0x%p", tid, tblk);
527 TXN_UNLOCK();
528
529 spin_lock_irq(&log->gclock); // LOGGC_LOCK
530 tblk->flag |= tblkGC_UNLOCKED;
531 spin_unlock_irq(&log->gclock); // LOGGC_UNLOCK
532 return;
533 }
534
535 jfs_info("txEnd: tid: %d, tblk = 0x%p", tid, tblk);
536
537 assert(tblk->next == 0);
538
539 /*
540 * insert tblock back on freelist
541 */
542 tblk->next = TxAnchor.freetid;
543 TxAnchor.freetid = tid;
544
545 /*
546 * mark the tblock not active
547 */
548 if (--log->active == 0) {
549 clear_bit(log_FLUSH, &log->flag);
550
551 /*
552 * synchronize with logsync barrier
553 */
554 if (test_bit(log_SYNCBARRIER, &log->flag)) {
Dave Kleikampcbc3d652005-07-27 09:17:57 -0500555 TXN_UNLOCK();
556
557 /* write dirty metadata & forward log syncpt */
558 jfs_syncpt(log, 1);
559
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 jfs_info("log barrier off: 0x%x", log->lsn);
561
562 /* enable new transactions start */
563 clear_bit(log_SYNCBARRIER, &log->flag);
564
565 /* wakeup all waitors for logsync barrier */
566 TXN_WAKEUP(&log->syncwait);
Dave Kleikamp1c627822005-05-02 12:25:08 -0600567
Dave Kleikamp1c627822005-05-02 12:25:08 -0600568 goto wakeup;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 }
570 }
571
Dave Kleikamp1c627822005-05-02 12:25:08 -0600572 TXN_UNLOCK();
573wakeup:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 /*
575 * wakeup all waitors for a free tblock
576 */
577 TXN_WAKEUP(&TxAnchor.freewait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578}
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500581 * txLock()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 *
583 * function: acquire a transaction lock on the specified <mp>
584 *
585 * parameter:
586 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500587 * return: transaction lock id
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 *
589 * serialization:
590 */
591struct tlock *txLock(tid_t tid, struct inode *ip, struct metapage * mp,
592 int type)
593{
594 struct jfs_inode_info *jfs_ip = JFS_IP(ip);
595 int dir_xtree = 0;
596 lid_t lid;
597 tid_t xtid;
598 struct tlock *tlck;
599 struct xtlock *xtlck;
600 struct linelock *linelock;
601 xtpage_t *p;
602 struct tblock *tblk;
603
604 TXN_LOCK();
605
606 if (S_ISDIR(ip->i_mode) && (type & tlckXTREE) &&
607 !(mp->xflag & COMMIT_PAGE)) {
608 /*
609 * Directory inode is special. It can have both an xtree tlock
610 * and a dtree tlock associated with it.
611 */
612 dir_xtree = 1;
613 lid = jfs_ip->xtlid;
614 } else
615 lid = mp->lid;
616
617 /* is page not locked by a transaction ? */
618 if (lid == 0)
619 goto allocateLock;
620
621 jfs_info("txLock: tid:%d ip:0x%p mp:0x%p lid:%d", tid, ip, mp, lid);
622
623 /* is page locked by the requester transaction ? */
624 tlck = lid_to_tlock(lid);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600625 if ((xtid = tlck->tid) == tid) {
626 TXN_UNLOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627 goto grantLock;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600628 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
630 /*
631 * is page locked by anonymous transaction/lock ?
632 *
633 * (page update without transaction (i.e., file write) is
634 * locked under anonymous transaction tid = 0:
635 * anonymous tlocks maintained on anonymous tlock list of
636 * the inode of the page and available to all anonymous
637 * transactions until txCommit() time at which point
638 * they are transferred to the transaction tlock list of
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300639 * the committing transaction of the inode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 */
641 if (xtid == 0) {
642 tlck->tid = tid;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600643 TXN_UNLOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 tblk = tid_to_tblock(tid);
645 /*
646 * The order of the tlocks in the transaction is important
647 * (during truncate, child xtree pages must be freed before
648 * parent's tlocks change the working map).
649 * Take tlock off anonymous list and add to tail of
650 * transaction list
651 *
652 * Note: We really need to get rid of the tid & lid and
653 * use list_head's. This code is getting UGLY!
654 */
655 if (jfs_ip->atlhead == lid) {
656 if (jfs_ip->atltail == lid) {
657 /* only anonymous txn.
658 * Remove from anon_list
659 */
Dave Kleikamp8a9cd6d2005-08-10 11:14:39 -0500660 TXN_LOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 list_del_init(&jfs_ip->anon_inode_list);
Dave Kleikamp8a9cd6d2005-08-10 11:14:39 -0500662 TXN_UNLOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 }
664 jfs_ip->atlhead = tlck->next;
665 } else {
666 lid_t last;
667 for (last = jfs_ip->atlhead;
668 lid_to_tlock(last)->next != lid;
669 last = lid_to_tlock(last)->next) {
670 assert(last);
671 }
672 lid_to_tlock(last)->next = tlck->next;
673 if (jfs_ip->atltail == lid)
674 jfs_ip->atltail = last;
675 }
676
677 /* insert the tlock at tail of transaction tlock list */
678
679 if (tblk->next)
680 lid_to_tlock(tblk->last)->next = lid;
681 else
682 tblk->next = lid;
683 tlck->next = 0;
684 tblk->last = lid;
685
686 goto grantLock;
687 }
688
689 goto waitLock;
690
691 /*
692 * allocate a tlock
693 */
694 allocateLock:
695 lid = txLockAlloc();
696 tlck = lid_to_tlock(lid);
697
698 /*
699 * initialize tlock
700 */
701 tlck->tid = tid;
702
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600703 TXN_UNLOCK();
704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 /* mark tlock for meta-data page */
706 if (mp->xflag & COMMIT_PAGE) {
707
708 tlck->flag = tlckPAGELOCK;
709
710 /* mark the page dirty and nohomeok */
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600711 metapage_nohomeok(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 jfs_info("locking mp = 0x%p, nohomeok = %d tid = %d tlck = 0x%p",
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600714 mp, mp->nohomeok, tid, tlck);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716 /* if anonymous transaction, and buffer is on the group
717 * commit synclist, mark inode to show this. This will
718 * prevent the buffer from being marked nohomeok for too
719 * long a time.
720 */
721 if ((tid == 0) && mp->lsn)
722 set_cflag(COMMIT_Synclist, ip);
723 }
724 /* mark tlock for in-memory inode */
725 else
726 tlck->flag = tlckINODELOCK;
727
Dave Kleikamp438282d2005-09-20 14:58:11 -0500728 if (S_ISDIR(ip->i_mode))
729 tlck->flag |= tlckDIRECTORY;
730
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 tlck->type = 0;
732
733 /* bind the tlock and the page */
734 tlck->ip = ip;
735 tlck->mp = mp;
736 if (dir_xtree)
737 jfs_ip->xtlid = lid;
738 else
739 mp->lid = lid;
740
741 /*
742 * enqueue transaction lock to transaction/inode
743 */
744 /* insert the tlock at tail of transaction tlock list */
745 if (tid) {
746 tblk = tid_to_tblock(tid);
747 if (tblk->next)
748 lid_to_tlock(tblk->last)->next = lid;
749 else
750 tblk->next = lid;
751 tlck->next = 0;
752 tblk->last = lid;
753 }
754 /* anonymous transaction:
755 * insert the tlock at head of inode anonymous tlock list
756 */
757 else {
758 tlck->next = jfs_ip->atlhead;
759 jfs_ip->atlhead = lid;
760 if (tlck->next == 0) {
761 /* This inode's first anonymous transaction */
762 jfs_ip->atltail = lid;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600763 TXN_LOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 list_add_tail(&jfs_ip->anon_inode_list,
765 &TxAnchor.anon_list);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600766 TXN_UNLOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
768 }
769
770 /* initialize type dependent area for linelock */
771 linelock = (struct linelock *) & tlck->lock;
772 linelock->next = 0;
773 linelock->flag = tlckLINELOCK;
774 linelock->maxcnt = TLOCKSHORT;
775 linelock->index = 0;
776
777 switch (type & tlckTYPE) {
778 case tlckDTREE:
779 linelock->l2linesize = L2DTSLOTSIZE;
780 break;
781
782 case tlckXTREE:
783 linelock->l2linesize = L2XTSLOTSIZE;
784
785 xtlck = (struct xtlock *) linelock;
786 xtlck->header.offset = 0;
787 xtlck->header.length = 2;
788
789 if (type & tlckNEW) {
790 xtlck->lwm.offset = XTENTRYSTART;
791 } else {
792 if (mp->xflag & COMMIT_PAGE)
793 p = (xtpage_t *) mp->data;
794 else
795 p = &jfs_ip->i_xtroot;
796 xtlck->lwm.offset =
797 le16_to_cpu(p->header.nextindex);
798 }
799 xtlck->lwm.length = 0; /* ! */
800 xtlck->twm.offset = 0;
801 xtlck->hwm.offset = 0;
802
803 xtlck->index = 2;
804 break;
805
806 case tlckINODE:
807 linelock->l2linesize = L2INODESLOTSIZE;
808 break;
809
810 case tlckDATA:
811 linelock->l2linesize = L2DATASLOTSIZE;
812 break;
813
814 default:
815 jfs_err("UFO tlock:0x%p", tlck);
816 }
817
818 /*
819 * update tlock vector
820 */
821 grantLock:
822 tlck->type |= type;
823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 return tlck;
825
826 /*
827 * page is being locked by another transaction:
828 */
829 waitLock:
830 /* Only locks on ipimap or ipaimap should reach here */
831 /* assert(jfs_ip->fileset == AGGREGATE_I); */
832 if (jfs_ip->fileset != AGGREGATE_I) {
Dave Kleikamp209e1012007-06-06 16:30:17 -0500833 printk(KERN_ERR "txLock: trying to lock locked page!");
Dave Kleikamp288e4d82007-06-13 10:17:50 -0500834 print_hex_dump(KERN_ERR, "ip: ", DUMP_PREFIX_ADDRESS, 16, 4,
835 ip, sizeof(*ip), 0);
836 print_hex_dump(KERN_ERR, "mp: ", DUMP_PREFIX_ADDRESS, 16, 4,
837 mp, sizeof(*mp), 0);
838 print_hex_dump(KERN_ERR, "Locker's tblock: ",
839 DUMP_PREFIX_ADDRESS, 16, 4, tid_to_tblock(tid),
840 sizeof(struct tblock), 0);
841 print_hex_dump(KERN_ERR, "Tlock: ", DUMP_PREFIX_ADDRESS, 16, 4,
842 tlck, sizeof(*tlck), 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 BUG();
844 }
845 INCREMENT(stattx.waitlock); /* statistics */
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600846 TXN_UNLOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 release_metapage(mp);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600848 TXN_LOCK();
Adrian Bunk04187262006-06-30 18:23:04 +0200849 xtid = tlck->tid; /* reacquire after dropping TXN_LOCK */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850
851 jfs_info("txLock: in waitLock, tid = %d, xtid = %d, lid = %d",
852 tid, xtid, lid);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600853
854 /* Recheck everything since dropping TXN_LOCK */
855 if (xtid && (tlck->mp == mp) && (mp->lid == lid))
856 TXN_SLEEP_DROP_LOCK(&tid_to_tblock(xtid)->waitor);
857 else
858 TXN_UNLOCK();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859 jfs_info("txLock: awakened tid = %d, lid = %d", tid, lid);
860
861 return NULL;
862}
863
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500865 * NAME: txRelease()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500867 * FUNCTION: Release buffers associated with transaction locks, but don't
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 * mark homeok yet. The allows other transactions to modify
869 * buffers, but won't let them go to disk until commit record
870 * actually gets written.
871 *
872 * PARAMETER:
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500873 * tblk -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500875 * RETURN: Errors from subroutines.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 */
877static void txRelease(struct tblock * tblk)
878{
879 struct metapage *mp;
880 lid_t lid;
881 struct tlock *tlck;
882
883 TXN_LOCK();
884
885 for (lid = tblk->next; lid; lid = tlck->next) {
886 tlck = lid_to_tlock(lid);
887 if ((mp = tlck->mp) != NULL &&
888 (tlck->type & tlckBTROOT) == 0) {
889 assert(mp->xflag & COMMIT_PAGE);
890 mp->lid = 0;
891 }
892 }
893
894 /*
895 * wakeup transactions waiting on a page locked
896 * by the current transaction
897 */
898 TXN_WAKEUP(&tblk->waitor);
899
900 TXN_UNLOCK();
901}
902
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500904 * NAME: txUnlock()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500906 * FUNCTION: Initiates pageout of pages modified by tid in journalled
907 * objects and frees their lockwords.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 */
909static void txUnlock(struct tblock * tblk)
910{
911 struct tlock *tlck;
912 struct linelock *linelock;
913 lid_t lid, next, llid, k;
914 struct metapage *mp;
915 struct jfs_log *log;
916 int difft, diffp;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600917 unsigned long flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918
919 jfs_info("txUnlock: tblk = 0x%p", tblk);
920 log = JFS_SBI(tblk->sb)->log;
921
922 /*
923 * mark page under tlock homeok (its log has been written):
924 */
925 for (lid = tblk->next; lid; lid = next) {
926 tlck = lid_to_tlock(lid);
927 next = tlck->next;
928
929 jfs_info("unlocking lid = %d, tlck = 0x%p", lid, tlck);
930
931 /* unbind page from tlock */
932 if ((mp = tlck->mp) != NULL &&
933 (tlck->type & tlckBTROOT) == 0) {
934 assert(mp->xflag & COMMIT_PAGE);
935
936 /* hold buffer
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 */
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600938 hold_metapage(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600940 assert(mp->nohomeok > 0);
941 _metapage_homeok(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
943 /* inherit younger/larger clsn */
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600944 LOGSYNC_LOCK(log, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 if (mp->clsn) {
946 logdiff(difft, tblk->clsn, log);
947 logdiff(diffp, mp->clsn, log);
948 if (difft > diffp)
949 mp->clsn = tblk->clsn;
950 } else
951 mp->clsn = tblk->clsn;
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600952 LOGSYNC_UNLOCK(log, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954 assert(!(tlck->flag & tlckFREEPAGE));
955
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600956 put_metapage(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 }
958
959 /* insert tlock, and linelock(s) of the tlock if any,
960 * at head of freelist
961 */
962 TXN_LOCK();
963
964 llid = ((struct linelock *) & tlck->lock)->next;
965 while (llid) {
966 linelock = (struct linelock *) lid_to_tlock(llid);
967 k = linelock->next;
968 txLockFree(llid);
969 llid = k;
970 }
971 txLockFree(lid);
972
973 TXN_UNLOCK();
974 }
975 tblk->next = tblk->last = 0;
976
977 /*
978 * remove tblock from logsynclist
979 * (allocation map pages inherited lsn of tblk and
980 * has been inserted in logsync list at txUpdateMap())
981 */
982 if (tblk->lsn) {
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600983 LOGSYNC_LOCK(log, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 log->count--;
985 list_del(&tblk->synclist);
Dave Kleikamp7fab4792005-05-02 12:25:02 -0600986 LOGSYNC_UNLOCK(log, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
988}
989
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500991 * txMaplock()
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 *
993 * function: allocate a transaction lock for freed page/entry;
Dave Kleikampf720e3b2007-06-06 15:28:35 -0500994 * for freed page, maplock is used as xtlock/dtlock type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 */
996struct tlock *txMaplock(tid_t tid, struct inode *ip, int type)
997{
998 struct jfs_inode_info *jfs_ip = JFS_IP(ip);
999 lid_t lid;
1000 struct tblock *tblk;
1001 struct tlock *tlck;
1002 struct maplock *maplock;
1003
1004 TXN_LOCK();
1005
1006 /*
1007 * allocate a tlock
1008 */
1009 lid = txLockAlloc();
1010 tlck = lid_to_tlock(lid);
1011
1012 /*
1013 * initialize tlock
1014 */
1015 tlck->tid = tid;
1016
1017 /* bind the tlock and the object */
1018 tlck->flag = tlckINODELOCK;
Dave Kleikamp438282d2005-09-20 14:58:11 -05001019 if (S_ISDIR(ip->i_mode))
1020 tlck->flag |= tlckDIRECTORY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 tlck->ip = ip;
1022 tlck->mp = NULL;
1023
1024 tlck->type = type;
1025
1026 /*
1027 * enqueue transaction lock to transaction/inode
1028 */
1029 /* insert the tlock at tail of transaction tlock list */
1030 if (tid) {
1031 tblk = tid_to_tblock(tid);
1032 if (tblk->next)
1033 lid_to_tlock(tblk->last)->next = lid;
1034 else
1035 tblk->next = lid;
1036 tlck->next = 0;
1037 tblk->last = lid;
1038 }
1039 /* anonymous transaction:
1040 * insert the tlock at head of inode anonymous tlock list
1041 */
1042 else {
1043 tlck->next = jfs_ip->atlhead;
1044 jfs_ip->atlhead = lid;
1045 if (tlck->next == 0) {
1046 /* This inode's first anonymous transaction */
1047 jfs_ip->atltail = lid;
1048 list_add_tail(&jfs_ip->anon_inode_list,
1049 &TxAnchor.anon_list);
1050 }
1051 }
1052
1053 TXN_UNLOCK();
1054
1055 /* initialize type dependent area for maplock */
1056 maplock = (struct maplock *) & tlck->lock;
1057 maplock->next = 0;
1058 maplock->maxcnt = 0;
1059 maplock->index = 0;
1060
1061 return tlck;
1062}
1063
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001065 * txLinelock()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 *
1067 * function: allocate a transaction lock for log vector list
1068 */
1069struct linelock *txLinelock(struct linelock * tlock)
1070{
1071 lid_t lid;
1072 struct tlock *tlck;
1073 struct linelock *linelock;
1074
1075 TXN_LOCK();
1076
1077 /* allocate a TxLock structure */
1078 lid = txLockAlloc();
1079 tlck = lid_to_tlock(lid);
1080
1081 TXN_UNLOCK();
1082
1083 /* initialize linelock */
1084 linelock = (struct linelock *) tlck;
1085 linelock->next = 0;
1086 linelock->flag = tlckLINELOCK;
1087 linelock->maxcnt = TLOCKLONG;
1088 linelock->index = 0;
Dave Kleikamp438282d2005-09-20 14:58:11 -05001089 if (tlck->flag & tlckDIRECTORY)
1090 linelock->flag |= tlckDIRECTORY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
1092 /* append linelock after tlock */
1093 linelock->next = tlock->next;
1094 tlock->next = lid;
1095
1096 return linelock;
1097}
1098
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001100 * transaction commit management
1101 * -----------------------------
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102 */
1103
1104/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001105 * NAME: txCommit()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001107 * FUNCTION: commit the changes to the objects specified in
1108 * clist. For journalled segments only the
1109 * changes of the caller are committed, ie by tid.
1110 * for non-journalled segments the data are flushed to
1111 * disk and then the change to the disk inode and indirect
1112 * blocks committed (so blocks newly allocated to the
1113 * segment will be made a part of the segment atomically).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001115 * all of the segments specified in clist must be in
1116 * one file system. no more than 6 segments are needed
1117 * to handle all unix svcs.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001119 * if the i_nlink field (i.e. disk inode link count)
1120 * is zero, and the type of inode is a regular file or
1121 * directory, or symbolic link , the inode is truncated
1122 * to zero length. the truncation is committed but the
1123 * VM resources are unaffected until it is closed (see
1124 * iput and iclose).
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 *
1126 * PARAMETER:
1127 *
1128 * RETURN:
1129 *
1130 * serialization:
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001131 * on entry the inode lock on each segment is assumed
1132 * to be held.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 *
1134 * i/o error:
1135 */
1136int txCommit(tid_t tid, /* transaction identifier */
1137 int nip, /* number of inodes to commit */
1138 struct inode **iplist, /* list of inode to commit */
1139 int flag)
1140{
1141 int rc = 0;
1142 struct commit cd;
1143 struct jfs_log *log;
1144 struct tblock *tblk;
1145 struct lrd *lrd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 struct inode *ip;
1147 struct jfs_inode_info *jfs_ip;
1148 int k, n;
1149 ino_t top;
1150 struct super_block *sb;
1151
1152 jfs_info("txCommit, tid = %d, flag = %d", tid, flag);
1153 /* is read-only file system ? */
1154 if (isReadOnly(iplist[0])) {
1155 rc = -EROFS;
1156 goto TheEnd;
1157 }
1158
1159 sb = cd.sb = iplist[0]->i_sb;
1160 cd.tid = tid;
1161
1162 if (tid == 0)
1163 tid = txBegin(sb, 0);
1164 tblk = tid_to_tblock(tid);
1165
1166 /*
1167 * initialize commit structure
1168 */
1169 log = JFS_SBI(sb)->log;
1170 cd.log = log;
1171
1172 /* initialize log record descriptor in commit */
1173 lrd = &cd.lrd;
1174 lrd->logtid = cpu_to_le32(tblk->logtid);
1175 lrd->backchain = 0;
1176
1177 tblk->xflag |= flag;
1178
1179 if ((flag & (COMMIT_FORCE | COMMIT_SYNC)) == 0)
1180 tblk->xflag |= COMMIT_LAZY;
1181 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001182 * prepare non-journaled objects for commit
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 *
1184 * flush data pages of non-journaled file
1185 * to prevent the file getting non-initialized disk blocks
1186 * in case of crash.
1187 * (new blocks - )
1188 */
1189 cd.iplist = iplist;
1190 cd.nip = nip;
1191
1192 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001193 * acquire transaction lock on (on-disk) inodes
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 *
1195 * update on-disk inode from in-memory inode
1196 * acquiring transaction locks for AFTER records
1197 * on the on-disk inode of file object
1198 *
1199 * sort the inodes array by inode number in descending order
1200 * to prevent deadlock when acquiring transaction lock
1201 * of on-disk inodes on multiple on-disk inode pages by
1202 * multiple concurrent transactions
1203 */
1204 for (k = 0; k < cd.nip; k++) {
1205 top = (cd.iplist[k])->i_ino;
1206 for (n = k + 1; n < cd.nip; n++) {
1207 ip = cd.iplist[n];
1208 if (ip->i_ino > top) {
1209 top = ip->i_ino;
1210 cd.iplist[n] = cd.iplist[k];
1211 cd.iplist[k] = ip;
1212 }
1213 }
1214
1215 ip = cd.iplist[k];
1216 jfs_ip = JFS_IP(ip);
1217
1218 /*
1219 * BUGBUG - This code has temporarily been removed. The
1220 * intent is to ensure that any file data is written before
1221 * the metadata is committed to the journal. This prevents
1222 * uninitialized data from appearing in a file after the
1223 * journal has been replayed. (The uninitialized data
1224 * could be sensitive data removed by another user.)
1225 *
1226 * The problem now is that we are holding the IWRITELOCK
1227 * on the inode, and calling filemap_fdatawrite on an
1228 * unmapped page will cause a deadlock in jfs_get_block.
1229 *
1230 * The long term solution is to pare down the use of
1231 * IWRITELOCK. We are currently holding it too long.
1232 * We could also be smarter about which data pages need
1233 * to be written before the transaction is committed and
1234 * when we don't need to worry about it at all.
1235 *
1236 * if ((!S_ISDIR(ip->i_mode))
OGAWA Hirofumi28fd1292006-01-08 01:02:14 -08001237 * && (tblk->flag & COMMIT_DELETE) == 0)
1238 * filemap_write_and_wait(ip->i_mapping);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 */
1240
1241 /*
1242 * Mark inode as not dirty. It will still be on the dirty
1243 * inode list, but we'll know not to commit it again unless
1244 * it gets marked dirty again
1245 */
1246 clear_cflag(COMMIT_Dirty, ip);
1247
1248 /* inherit anonymous tlock(s) of inode */
1249 if (jfs_ip->atlhead) {
1250 lid_to_tlock(jfs_ip->atltail)->next = tblk->next;
1251 tblk->next = jfs_ip->atlhead;
1252 if (!tblk->last)
1253 tblk->last = jfs_ip->atltail;
1254 jfs_ip->atlhead = jfs_ip->atltail = 0;
1255 TXN_LOCK();
1256 list_del_init(&jfs_ip->anon_inode_list);
1257 TXN_UNLOCK();
1258 }
1259
1260 /*
1261 * acquire transaction lock on on-disk inode page
1262 * (become first tlock of the tblk's tlock list)
1263 */
1264 if (((rc = diWrite(tid, ip))))
1265 goto out;
1266 }
1267
1268 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001269 * write log records from transaction locks
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 *
1271 * txUpdateMap() resets XAD_NEW in XAD.
1272 */
1273 if ((rc = txLog(log, tblk, &cd)))
1274 goto TheEnd;
1275
1276 /*
1277 * Ensure that inode isn't reused before
1278 * lazy commit thread finishes processing
1279 */
1280 if (tblk->xflag & COMMIT_DELETE) {
Al Viro7de9c6ee2010-10-23 11:11:40 -04001281 ihold(tblk->u.ip);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 /*
1283 * Avoid a rare deadlock
1284 *
1285 * If the inode is locked, we may be blocked in
1286 * jfs_commit_inode. If so, we don't want the
1287 * lazy_commit thread doing the last iput() on the inode
1288 * since that may block on the locked inode. Instead,
1289 * commit the transaction synchronously, so the last iput
1290 * will be done by the calling thread (or later)
1291 */
Joern Engel1c0eeaf2007-10-16 23:30:44 -07001292 /*
1293 * I believe this code is no longer needed. Splitting I_LOCK
Christoph Hellwigeaff8072009-12-17 14:25:01 +01001294 * into two bits, I_NEW and I_SYNC should prevent this
Joern Engel1c0eeaf2007-10-16 23:30:44 -07001295 * deadlock as well. But since I don't have a JFS testload
1296 * to verify this, only a trivial s/I_LOCK/I_SYNC/ was done.
1297 * Joern
1298 */
1299 if (tblk->u.ip->i_state & I_SYNC)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 tblk->xflag &= ~COMMIT_LAZY;
1301 }
1302
1303 ASSERT((!(tblk->xflag & COMMIT_DELETE)) ||
1304 ((tblk->u.ip->i_nlink == 0) &&
1305 !test_cflag(COMMIT_Nolink, tblk->u.ip)));
1306
1307 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001308 * write COMMIT log record
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309 */
1310 lrd->type = cpu_to_le16(LOG_COMMIT);
1311 lrd->length = 0;
Dave Kleikamp3c2c2262011-06-20 13:00:27 -05001312 lmLog(log, tblk, lrd, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313
1314 lmGroupCommit(log, tblk);
1315
1316 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001317 * - transaction is now committed -
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 */
1319
1320 /*
1321 * force pages in careful update
1322 * (imap addressing structure update)
1323 */
1324 if (flag & COMMIT_FORCE)
1325 txForce(tblk);
1326
1327 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001328 * update allocation map.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 *
1330 * update inode allocation map and inode:
1331 * free pager lock on memory object of inode if any.
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001332 * update block allocation map.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 *
1334 * txUpdateMap() resets XAD_NEW in XAD.
1335 */
1336 if (tblk->xflag & COMMIT_FORCE)
1337 txUpdateMap(tblk);
1338
1339 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001340 * free transaction locks and pageout/free pages
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 */
1342 txRelease(tblk);
1343
1344 if ((tblk->flag & tblkGC_LAZY) == 0)
1345 txUnlock(tblk);
1346
1347
1348 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001349 * reset in-memory object state
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350 */
1351 for (k = 0; k < cd.nip; k++) {
1352 ip = cd.iplist[k];
1353 jfs_ip = JFS_IP(ip);
1354
1355 /*
1356 * reset in-memory inode state
1357 */
1358 jfs_ip->bxflag = 0;
1359 jfs_ip->blid = 0;
1360 }
1361
1362 out:
1363 if (rc != 0)
1364 txAbort(tid, 1);
1365
1366 TheEnd:
1367 jfs_info("txCommit: tid = %d, returning %d", tid, rc);
1368 return rc;
1369}
1370
Linus Torvalds1da177e2005-04-16 15:20:36 -07001371/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001372 * NAME: txLog()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001374 * FUNCTION: Writes AFTER log records for all lines modified
1375 * by tid for segments specified by inodes in comdata.
1376 * Code assumes only WRITELOCKS are recorded in lockwords.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 *
1378 * PARAMETERS:
1379 *
1380 * RETURN :
1381 */
1382static int txLog(struct jfs_log * log, struct tblock * tblk, struct commit * cd)
1383{
1384 int rc = 0;
1385 struct inode *ip;
1386 lid_t lid;
1387 struct tlock *tlck;
1388 struct lrd *lrd = &cd->lrd;
1389
1390 /*
1391 * write log record(s) for each tlock of transaction,
1392 */
1393 for (lid = tblk->next; lid; lid = tlck->next) {
1394 tlck = lid_to_tlock(lid);
1395
1396 tlck->flag |= tlckLOG;
1397
1398 /* initialize lrd common */
1399 ip = tlck->ip;
1400 lrd->aggregate = cpu_to_le32(JFS_SBI(ip->i_sb)->aggregate);
1401 lrd->log.redopage.fileset = cpu_to_le32(JFS_IP(ip)->fileset);
1402 lrd->log.redopage.inode = cpu_to_le32(ip->i_ino);
1403
1404 /* write log record of page from the tlock */
1405 switch (tlck->type & tlckTYPE) {
1406 case tlckXTREE:
1407 xtLog(log, tblk, lrd, tlck);
1408 break;
1409
1410 case tlckDTREE:
1411 dtLog(log, tblk, lrd, tlck);
1412 break;
1413
1414 case tlckINODE:
1415 diLog(log, tblk, lrd, tlck, cd);
1416 break;
1417
1418 case tlckMAP:
1419 mapLog(log, tblk, lrd, tlck);
1420 break;
1421
1422 case tlckDATA:
1423 dataLog(log, tblk, lrd, tlck);
1424 break;
1425
1426 default:
1427 jfs_err("UFO tlock:0x%p", tlck);
1428 }
1429 }
1430
1431 return rc;
1432}
1433
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001435 * diLog()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001437 * function: log inode tlock and format maplock to update bmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 */
1439static int diLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001440 struct tlock * tlck, struct commit * cd)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441{
1442 int rc = 0;
1443 struct metapage *mp;
1444 pxd_t *pxd;
1445 struct pxd_lock *pxdlock;
1446
1447 mp = tlck->mp;
1448
1449 /* initialize as REDOPAGE record format */
1450 lrd->log.redopage.type = cpu_to_le16(LOG_INODE);
1451 lrd->log.redopage.l2linesize = cpu_to_le16(L2INODESLOTSIZE);
1452
1453 pxd = &lrd->log.redopage.pxd;
1454
1455 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001456 * inode after image
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 */
1458 if (tlck->type & tlckENTRY) {
1459 /* log after-image for logredo(): */
1460 lrd->type = cpu_to_le16(LOG_REDOPAGE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461 PXDaddress(pxd, mp->index);
1462 PXDlength(pxd,
1463 mp->logical_size >> tblk->sb->s_blocksize_bits);
1464 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1465
1466 /* mark page as homeward bound */
1467 tlck->flag |= tlckWRITEPAGE;
1468 } else if (tlck->type & tlckFREE) {
1469 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001470 * free inode extent
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 *
1472 * (pages of the freed inode extent have been invalidated and
1473 * a maplock for free of the extent has been formatted at
1474 * txLock() time);
1475 *
1476 * the tlock had been acquired on the inode allocation map page
1477 * (iag) that specifies the freed extent, even though the map
1478 * page is not itself logged, to prevent pageout of the map
1479 * page before the log;
1480 */
1481
1482 /* log LOG_NOREDOINOEXT of the freed inode extent for
1483 * logredo() to start NoRedoPage filters, and to update
1484 * imap and bmap for free of the extent;
1485 */
1486 lrd->type = cpu_to_le16(LOG_NOREDOINOEXT);
1487 /*
1488 * For the LOG_NOREDOINOEXT record, we need
1489 * to pass the IAG number and inode extent
1490 * index (within that IAG) from which the
1491 * the extent being released. These have been
1492 * passed to us in the iplist[1] and iplist[2].
1493 */
1494 lrd->log.noredoinoext.iagnum =
1495 cpu_to_le32((u32) (size_t) cd->iplist[1]);
1496 lrd->log.noredoinoext.inoext_idx =
1497 cpu_to_le32((u32) (size_t) cd->iplist[2]);
1498
1499 pxdlock = (struct pxd_lock *) & tlck->lock;
1500 *pxd = pxdlock->pxd;
1501 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
1502
1503 /* update bmap */
1504 tlck->flag |= tlckUPDATEMAP;
1505
1506 /* mark page as homeward bound */
1507 tlck->flag |= tlckWRITEPAGE;
1508 } else
1509 jfs_err("diLog: UFO type tlck:0x%p", tlck);
1510#ifdef _JFS_WIP
1511 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001512 * alloc/free external EA extent
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 *
1514 * a maplock for txUpdateMap() to update bPWMAP for alloc/free
1515 * of the extent has been formatted at txLock() time;
1516 */
1517 else {
1518 assert(tlck->type & tlckEA);
1519
1520 /* log LOG_UPDATEMAP for logredo() to update bmap for
1521 * alloc of new (and free of old) external EA extent;
1522 */
1523 lrd->type = cpu_to_le16(LOG_UPDATEMAP);
1524 pxdlock = (struct pxd_lock *) & tlck->lock;
1525 nlock = pxdlock->index;
1526 for (i = 0; i < nlock; i++, pxdlock++) {
1527 if (pxdlock->flag & mlckALLOCPXD)
1528 lrd->log.updatemap.type =
1529 cpu_to_le16(LOG_ALLOCPXD);
1530 else
1531 lrd->log.updatemap.type =
1532 cpu_to_le16(LOG_FREEPXD);
1533 lrd->log.updatemap.nxd = cpu_to_le16(1);
1534 lrd->log.updatemap.pxd = pxdlock->pxd;
1535 lrd->backchain =
1536 cpu_to_le32(lmLog(log, tblk, lrd, NULL));
1537 }
1538
1539 /* update bmap */
1540 tlck->flag |= tlckUPDATEMAP;
1541 }
1542#endif /* _JFS_WIP */
1543
1544 return rc;
1545}
1546
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001548 * dataLog()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001550 * function: log data tlock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551 */
1552static int dataLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
1553 struct tlock * tlck)
1554{
1555 struct metapage *mp;
1556 pxd_t *pxd;
1557
1558 mp = tlck->mp;
1559
1560 /* initialize as REDOPAGE record format */
1561 lrd->log.redopage.type = cpu_to_le16(LOG_DATA);
1562 lrd->log.redopage.l2linesize = cpu_to_le16(L2DATASLOTSIZE);
1563
1564 pxd = &lrd->log.redopage.pxd;
1565
1566 /* log after-image for logredo(): */
1567 lrd->type = cpu_to_le16(LOG_REDOPAGE);
1568
1569 if (jfs_dirtable_inline(tlck->ip)) {
1570 /*
1571 * The table has been truncated, we've must have deleted
1572 * the last entry, so don't bother logging this
1573 */
1574 mp->lid = 0;
Dave Kleikamp7fab4792005-05-02 12:25:02 -06001575 grab_metapage(mp);
1576 metapage_homeok(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 discard_metapage(mp);
1578 tlck->mp = NULL;
1579 return 0;
1580 }
1581
1582 PXDaddress(pxd, mp->index);
1583 PXDlength(pxd, mp->logical_size >> tblk->sb->s_blocksize_bits);
1584
1585 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1586
1587 /* mark page as homeward bound */
1588 tlck->flag |= tlckWRITEPAGE;
1589
1590 return 0;
1591}
1592
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001594 * dtLog()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001596 * function: log dtree tlock and format maplock to update bmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597 */
1598static void dtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
1599 struct tlock * tlck)
1600{
1601 struct metapage *mp;
1602 struct pxd_lock *pxdlock;
1603 pxd_t *pxd;
1604
1605 mp = tlck->mp;
1606
1607 /* initialize as REDOPAGE/NOREDOPAGE record format */
1608 lrd->log.redopage.type = cpu_to_le16(LOG_DTREE);
1609 lrd->log.redopage.l2linesize = cpu_to_le16(L2DTSLOTSIZE);
1610
1611 pxd = &lrd->log.redopage.pxd;
1612
1613 if (tlck->type & tlckBTROOT)
1614 lrd->log.redopage.type |= cpu_to_le16(LOG_BTROOT);
1615
1616 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001617 * page extension via relocation: entry insertion;
1618 * page extension in-place: entry insertion;
1619 * new right page from page split, reinitialized in-line
1620 * root from root page split: entry insertion;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621 */
1622 if (tlck->type & (tlckNEW | tlckEXTEND)) {
1623 /* log after-image of the new page for logredo():
1624 * mark log (LOG_NEW) for logredo() to initialize
1625 * freelist and update bmap for alloc of the new page;
1626 */
1627 lrd->type = cpu_to_le16(LOG_REDOPAGE);
1628 if (tlck->type & tlckEXTEND)
1629 lrd->log.redopage.type |= cpu_to_le16(LOG_EXTEND);
1630 else
1631 lrd->log.redopage.type |= cpu_to_le16(LOG_NEW);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 PXDaddress(pxd, mp->index);
1633 PXDlength(pxd,
1634 mp->logical_size >> tblk->sb->s_blocksize_bits);
1635 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1636
1637 /* format a maplock for txUpdateMap() to update bPMAP for
1638 * alloc of the new page;
1639 */
1640 if (tlck->type & tlckBTROOT)
1641 return;
1642 tlck->flag |= tlckUPDATEMAP;
1643 pxdlock = (struct pxd_lock *) & tlck->lock;
1644 pxdlock->flag = mlckALLOCPXD;
1645 pxdlock->pxd = *pxd;
1646
1647 pxdlock->index = 1;
1648
1649 /* mark page as homeward bound */
1650 tlck->flag |= tlckWRITEPAGE;
1651 return;
1652 }
1653
1654 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001655 * entry insertion/deletion,
1656 * sibling page link update (old right page before split);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657 */
1658 if (tlck->type & (tlckENTRY | tlckRELINK)) {
1659 /* log after-image for logredo(): */
1660 lrd->type = cpu_to_le16(LOG_REDOPAGE);
1661 PXDaddress(pxd, mp->index);
1662 PXDlength(pxd,
1663 mp->logical_size >> tblk->sb->s_blocksize_bits);
1664 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1665
1666 /* mark page as homeward bound */
1667 tlck->flag |= tlckWRITEPAGE;
1668 return;
1669 }
1670
1671 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001672 * page deletion: page has been invalidated
1673 * page relocation: source extent
Linus Torvalds1da177e2005-04-16 15:20:36 -07001674 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001675 * a maplock for free of the page has been formatted
1676 * at txLock() time);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 */
1678 if (tlck->type & (tlckFREE | tlckRELOCATE)) {
1679 /* log LOG_NOREDOPAGE of the deleted page for logredo()
1680 * to start NoRedoPage filter and to update bmap for free
1681 * of the deletd page
1682 */
1683 lrd->type = cpu_to_le16(LOG_NOREDOPAGE);
1684 pxdlock = (struct pxd_lock *) & tlck->lock;
1685 *pxd = pxdlock->pxd;
1686 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
1687
1688 /* a maplock for txUpdateMap() for free of the page
1689 * has been formatted at txLock() time;
1690 */
1691 tlck->flag |= tlckUPDATEMAP;
1692 }
1693 return;
1694}
1695
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001697 * xtLog()
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001699 * function: log xtree tlock and format maplock to update bmap;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 */
1701static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
1702 struct tlock * tlck)
1703{
1704 struct inode *ip;
1705 struct metapage *mp;
1706 xtpage_t *p;
1707 struct xtlock *xtlck;
1708 struct maplock *maplock;
1709 struct xdlistlock *xadlock;
1710 struct pxd_lock *pxdlock;
Dave Kleikamp66f31312005-05-02 12:24:46 -06001711 pxd_t *page_pxd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001712 int next, lwm, hwm;
1713
1714 ip = tlck->ip;
1715 mp = tlck->mp;
1716
1717 /* initialize as REDOPAGE/NOREDOPAGE record format */
1718 lrd->log.redopage.type = cpu_to_le16(LOG_XTREE);
1719 lrd->log.redopage.l2linesize = cpu_to_le16(L2XTSLOTSIZE);
1720
Dave Kleikamp66f31312005-05-02 12:24:46 -06001721 page_pxd = &lrd->log.redopage.pxd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001722
1723 if (tlck->type & tlckBTROOT) {
1724 lrd->log.redopage.type |= cpu_to_le16(LOG_BTROOT);
1725 p = &JFS_IP(ip)->i_xtroot;
1726 if (S_ISDIR(ip->i_mode))
1727 lrd->log.redopage.type |=
1728 cpu_to_le16(LOG_DIR_XTREE);
1729 } else
1730 p = (xtpage_t *) mp->data;
1731 next = le16_to_cpu(p->header.nextindex);
1732
1733 xtlck = (struct xtlock *) & tlck->lock;
1734
1735 maplock = (struct maplock *) & tlck->lock;
1736 xadlock = (struct xdlistlock *) maplock;
1737
1738 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001739 * entry insertion/extension;
1740 * sibling page link update (old right page before split);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001741 */
1742 if (tlck->type & (tlckNEW | tlckGROW | tlckRELINK)) {
1743 /* log after-image for logredo():
1744 * logredo() will update bmap for alloc of new/extended
1745 * extents (XAD_NEW|XAD_EXTEND) of XAD[lwm:next) from
1746 * after-image of XADlist;
1747 * logredo() resets (XAD_NEW|XAD_EXTEND) flag when
1748 * applying the after-image to the meta-data page.
1749 */
1750 lrd->type = cpu_to_le16(LOG_REDOPAGE);
Dave Kleikamp66f31312005-05-02 12:24:46 -06001751 PXDaddress(page_pxd, mp->index);
1752 PXDlength(page_pxd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 mp->logical_size >> tblk->sb->s_blocksize_bits);
1754 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1755
1756 /* format a maplock for txUpdateMap() to update bPMAP
1757 * for alloc of new/extended extents of XAD[lwm:next)
1758 * from the page itself;
1759 * txUpdateMap() resets (XAD_NEW|XAD_EXTEND) flag.
1760 */
1761 lwm = xtlck->lwm.offset;
1762 if (lwm == 0)
1763 lwm = XTPAGEMAXSLOT;
1764
1765 if (lwm == next)
1766 goto out;
1767 if (lwm > next) {
1768 jfs_err("xtLog: lwm > next\n");
1769 goto out;
1770 }
1771 tlck->flag |= tlckUPDATEMAP;
1772 xadlock->flag = mlckALLOCXADLIST;
1773 xadlock->count = next - lwm;
Dave Kleikamp66f31312005-05-02 12:24:46 -06001774 if ((xadlock->count <= 4) && (tblk->xflag & COMMIT_LAZY)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775 int i;
Dave Kleikamp66f31312005-05-02 12:24:46 -06001776 pxd_t *pxd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001777 /*
1778 * Lazy commit may allow xtree to be modified before
1779 * txUpdateMap runs. Copy xad into linelock to
1780 * preserve correct data.
Dave Kleikamp66f31312005-05-02 12:24:46 -06001781 *
1782 * We can fit twice as may pxd's as xads in the lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783 */
Dave Kleikamp66f31312005-05-02 12:24:46 -06001784 xadlock->flag = mlckALLOCPXDLIST;
1785 pxd = xadlock->xdlist = &xtlck->pxdlock;
1786 for (i = 0; i < xadlock->count; i++) {
1787 PXDaddress(pxd, addressXAD(&p->xad[lwm + i]));
1788 PXDlength(pxd, lengthXAD(&p->xad[lwm + i]));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001789 p->xad[lwm + i].flag &=
1790 ~(XAD_NEW | XAD_EXTENDED);
Dave Kleikamp66f31312005-05-02 12:24:46 -06001791 pxd++;
1792 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 } else {
1794 /*
1795 * xdlist will point to into inode's xtree, ensure
1796 * that transaction is not committed lazily.
1797 */
Dave Kleikamp66f31312005-05-02 12:24:46 -06001798 xadlock->flag = mlckALLOCXADLIST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 xadlock->xdlist = &p->xad[lwm];
1800 tblk->xflag &= ~COMMIT_LAZY;
1801 }
1802 jfs_info("xtLog: alloc ip:0x%p mp:0x%p tlck:0x%p lwm:%d "
1803 "count:%d", tlck->ip, mp, tlck, lwm, xadlock->count);
1804
1805 maplock->index = 1;
1806
1807 out:
1808 /* mark page as homeward bound */
1809 tlck->flag |= tlckWRITEPAGE;
1810
1811 return;
1812 }
1813
1814 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001815 * page deletion: file deletion/truncation (ref. xtTruncate())
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 *
1817 * (page will be invalidated after log is written and bmap
1818 * is updated from the page);
1819 */
1820 if (tlck->type & tlckFREE) {
1821 /* LOG_NOREDOPAGE log for NoRedoPage filter:
1822 * if page free from file delete, NoRedoFile filter from
1823 * inode image of zero link count will subsume NoRedoPage
1824 * filters for each page;
1825 * if page free from file truncattion, write NoRedoPage
1826 * filter;
1827 *
1828 * upadte of block allocation map for the page itself:
1829 * if page free from deletion and truncation, LOG_UPDATEMAP
1830 * log for the page itself is generated from processing
1831 * its parent page xad entries;
1832 */
1833 /* if page free from file truncation, log LOG_NOREDOPAGE
1834 * of the deleted page for logredo() to start NoRedoPage
1835 * filter for the page;
1836 */
1837 if (tblk->xflag & COMMIT_TRUNCATE) {
1838 /* write NOREDOPAGE for the page */
1839 lrd->type = cpu_to_le16(LOG_NOREDOPAGE);
Dave Kleikamp66f31312005-05-02 12:24:46 -06001840 PXDaddress(page_pxd, mp->index);
1841 PXDlength(page_pxd,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842 mp->logical_size >> tblk->sb->
1843 s_blocksize_bits);
1844 lrd->backchain =
1845 cpu_to_le32(lmLog(log, tblk, lrd, NULL));
1846
1847 if (tlck->type & tlckBTROOT) {
1848 /* Empty xtree must be logged */
1849 lrd->type = cpu_to_le16(LOG_REDOPAGE);
1850 lrd->backchain =
1851 cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1852 }
1853 }
1854
1855 /* init LOG_UPDATEMAP of the freed extents
1856 * XAD[XTENTRYSTART:hwm) from the deleted page itself
1857 * for logredo() to update bmap;
1858 */
1859 lrd->type = cpu_to_le16(LOG_UPDATEMAP);
1860 lrd->log.updatemap.type = cpu_to_le16(LOG_FREEXADLIST);
1861 xtlck = (struct xtlock *) & tlck->lock;
1862 hwm = xtlck->hwm.offset;
1863 lrd->log.updatemap.nxd =
1864 cpu_to_le16(hwm - XTENTRYSTART + 1);
1865 /* reformat linelock for lmLog() */
1866 xtlck->header.offset = XTENTRYSTART;
1867 xtlck->header.length = hwm - XTENTRYSTART + 1;
1868 xtlck->index = 1;
1869 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1870
1871 /* format a maplock for txUpdateMap() to update bmap
1872 * to free extents of XAD[XTENTRYSTART:hwm) from the
1873 * deleted page itself;
1874 */
1875 tlck->flag |= tlckUPDATEMAP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001876 xadlock->count = hwm - XTENTRYSTART + 1;
Dave Kleikamp66f31312005-05-02 12:24:46 -06001877 if ((xadlock->count <= 4) && (tblk->xflag & COMMIT_LAZY)) {
1878 int i;
1879 pxd_t *pxd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001880 /*
1881 * Lazy commit may allow xtree to be modified before
1882 * txUpdateMap runs. Copy xad into linelock to
1883 * preserve correct data.
Dave Kleikamp66f31312005-05-02 12:24:46 -06001884 *
1885 * We can fit twice as may pxd's as xads in the lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 */
Dave Kleikamp66f31312005-05-02 12:24:46 -06001887 xadlock->flag = mlckFREEPXDLIST;
1888 pxd = xadlock->xdlist = &xtlck->pxdlock;
1889 for (i = 0; i < xadlock->count; i++) {
1890 PXDaddress(pxd,
1891 addressXAD(&p->xad[XTENTRYSTART + i]));
1892 PXDlength(pxd,
1893 lengthXAD(&p->xad[XTENTRYSTART + i]));
1894 pxd++;
1895 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 } else {
1897 /*
1898 * xdlist will point to into inode's xtree, ensure
1899 * that transaction is not committed lazily.
1900 */
Dave Kleikamp66f31312005-05-02 12:24:46 -06001901 xadlock->flag = mlckFREEXADLIST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 xadlock->xdlist = &p->xad[XTENTRYSTART];
1903 tblk->xflag &= ~COMMIT_LAZY;
1904 }
1905 jfs_info("xtLog: free ip:0x%p mp:0x%p count:%d lwm:2",
1906 tlck->ip, mp, xadlock->count);
1907
1908 maplock->index = 1;
1909
1910 /* mark page as invalid */
1911 if (((tblk->xflag & COMMIT_PWMAP) || S_ISDIR(ip->i_mode))
1912 && !(tlck->type & tlckBTROOT))
1913 tlck->flag |= tlckFREEPAGE;
1914 /*
1915 else (tblk->xflag & COMMIT_PMAP)
1916 ? release the page;
1917 */
1918 return;
1919 }
1920
1921 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001922 * page/entry truncation: file truncation (ref. xtTruncate())
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001924 * |----------+------+------+---------------|
1925 * | | |
1926 * | | hwm - hwm before truncation
1927 * | next - truncation point
1928 * lwm - lwm before truncation
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 * header ?
1930 */
1931 if (tlck->type & tlckTRUNCATE) {
Dave Kleikampc9e3ad62007-02-09 15:36:47 -06001932 /* This odd declaration suppresses a bogus gcc warning */
1933 pxd_t pxd = pxd; /* truncated extent of xad */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 int twm;
1935
1936 /*
1937 * For truncation the entire linelock may be used, so it would
1938 * be difficult to store xad list in linelock itself.
1939 * Therefore, we'll just force transaction to be committed
1940 * synchronously, so that xtree pages won't be changed before
1941 * txUpdateMap runs.
1942 */
1943 tblk->xflag &= ~COMMIT_LAZY;
1944 lwm = xtlck->lwm.offset;
1945 if (lwm == 0)
1946 lwm = XTPAGEMAXSLOT;
1947 hwm = xtlck->hwm.offset;
1948 twm = xtlck->twm.offset;
1949
1950 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05001951 * write log records
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 */
1953 /* log after-image for logredo():
1954 *
1955 * logredo() will update bmap for alloc of new/extended
1956 * extents (XAD_NEW|XAD_EXTEND) of XAD[lwm:next) from
1957 * after-image of XADlist;
1958 * logredo() resets (XAD_NEW|XAD_EXTEND) flag when
1959 * applying the after-image to the meta-data page.
1960 */
1961 lrd->type = cpu_to_le16(LOG_REDOPAGE);
Dave Kleikamp66f31312005-05-02 12:24:46 -06001962 PXDaddress(page_pxd, mp->index);
1963 PXDlength(page_pxd,
1964 mp->logical_size >> tblk->sb->s_blocksize_bits);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001965 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, tlck));
1966
1967 /*
1968 * truncate entry XAD[twm == next - 1]:
1969 */
1970 if (twm == next - 1) {
1971 /* init LOG_UPDATEMAP for logredo() to update bmap for
1972 * free of truncated delta extent of the truncated
1973 * entry XAD[next - 1]:
1974 * (xtlck->pxdlock = truncated delta extent);
1975 */
1976 pxdlock = (struct pxd_lock *) & xtlck->pxdlock;
1977 /* assert(pxdlock->type & tlckTRUNCATE); */
1978 lrd->type = cpu_to_le16(LOG_UPDATEMAP);
1979 lrd->log.updatemap.type = cpu_to_le16(LOG_FREEPXD);
1980 lrd->log.updatemap.nxd = cpu_to_le16(1);
1981 lrd->log.updatemap.pxd = pxdlock->pxd;
Dave Kleikamp66f31312005-05-02 12:24:46 -06001982 pxd = pxdlock->pxd; /* save to format maplock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 lrd->backchain =
1984 cpu_to_le32(lmLog(log, tblk, lrd, NULL));
1985 }
1986
1987 /*
1988 * free entries XAD[next:hwm]:
1989 */
1990 if (hwm >= next) {
1991 /* init LOG_UPDATEMAP of the freed extents
1992 * XAD[next:hwm] from the deleted page itself
1993 * for logredo() to update bmap;
1994 */
1995 lrd->type = cpu_to_le16(LOG_UPDATEMAP);
1996 lrd->log.updatemap.type =
1997 cpu_to_le16(LOG_FREEXADLIST);
1998 xtlck = (struct xtlock *) & tlck->lock;
1999 hwm = xtlck->hwm.offset;
2000 lrd->log.updatemap.nxd =
2001 cpu_to_le16(hwm - next + 1);
2002 /* reformat linelock for lmLog() */
2003 xtlck->header.offset = next;
2004 xtlck->header.length = hwm - next + 1;
2005 xtlck->index = 1;
2006 lrd->backchain =
2007 cpu_to_le32(lmLog(log, tblk, lrd, tlck));
2008 }
2009
2010 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002011 * format maplock(s) for txUpdateMap() to update bmap
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012 */
2013 maplock->index = 0;
2014
2015 /*
2016 * allocate entries XAD[lwm:next):
2017 */
2018 if (lwm < next) {
2019 /* format a maplock for txUpdateMap() to update bPMAP
2020 * for alloc of new/extended extents of XAD[lwm:next)
2021 * from the page itself;
2022 * txUpdateMap() resets (XAD_NEW|XAD_EXTEND) flag.
2023 */
2024 tlck->flag |= tlckUPDATEMAP;
2025 xadlock->flag = mlckALLOCXADLIST;
2026 xadlock->count = next - lwm;
2027 xadlock->xdlist = &p->xad[lwm];
2028
2029 jfs_info("xtLog: alloc ip:0x%p mp:0x%p count:%d "
2030 "lwm:%d next:%d",
2031 tlck->ip, mp, xadlock->count, lwm, next);
2032 maplock->index++;
2033 xadlock++;
2034 }
2035
2036 /*
2037 * truncate entry XAD[twm == next - 1]:
2038 */
2039 if (twm == next - 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002040 /* format a maplock for txUpdateMap() to update bmap
2041 * to free truncated delta extent of the truncated
2042 * entry XAD[next - 1];
2043 * (xtlck->pxdlock = truncated delta extent);
2044 */
2045 tlck->flag |= tlckUPDATEMAP;
2046 pxdlock = (struct pxd_lock *) xadlock;
2047 pxdlock->flag = mlckFREEPXD;
2048 pxdlock->count = 1;
Dave Kleikamp66f31312005-05-02 12:24:46 -06002049 pxdlock->pxd = pxd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002050
2051 jfs_info("xtLog: truncate ip:0x%p mp:0x%p count:%d "
2052 "hwm:%d", ip, mp, pxdlock->count, hwm);
2053 maplock->index++;
2054 xadlock++;
2055 }
2056
2057 /*
2058 * free entries XAD[next:hwm]:
2059 */
2060 if (hwm >= next) {
2061 /* format a maplock for txUpdateMap() to update bmap
2062 * to free extents of XAD[next:hwm] from thedeleted
2063 * page itself;
2064 */
2065 tlck->flag |= tlckUPDATEMAP;
2066 xadlock->flag = mlckFREEXADLIST;
2067 xadlock->count = hwm - next + 1;
2068 xadlock->xdlist = &p->xad[next];
2069
2070 jfs_info("xtLog: free ip:0x%p mp:0x%p count:%d "
2071 "next:%d hwm:%d",
2072 tlck->ip, mp, xadlock->count, next, hwm);
2073 maplock->index++;
2074 }
2075
2076 /* mark page as homeward bound */
2077 tlck->flag |= tlckWRITEPAGE;
2078 }
2079 return;
2080}
2081
Linus Torvalds1da177e2005-04-16 15:20:36 -07002082/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002083 * mapLog()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002085 * function: log from maplock of freed data extents;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 */
Dave Kleikamp6cb12692005-09-15 23:25:41 -05002087static void mapLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
2088 struct tlock * tlck)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089{
2090 struct pxd_lock *pxdlock;
2091 int i, nlock;
2092 pxd_t *pxd;
2093
2094 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002095 * page relocation: free the source page extent
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 *
2097 * a maplock for txUpdateMap() for free of the page
2098 * has been formatted at txLock() time saving the src
2099 * relocated page address;
2100 */
2101 if (tlck->type & tlckRELOCATE) {
2102 /* log LOG_NOREDOPAGE of the old relocated page
2103 * for logredo() to start NoRedoPage filter;
2104 */
2105 lrd->type = cpu_to_le16(LOG_NOREDOPAGE);
2106 pxdlock = (struct pxd_lock *) & tlck->lock;
2107 pxd = &lrd->log.redopage.pxd;
2108 *pxd = pxdlock->pxd;
2109 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
2110
2111 /* (N.B. currently, logredo() does NOT update bmap
2112 * for free of the page itself for (LOG_XTREE|LOG_NOREDOPAGE);
2113 * if page free from relocation, LOG_UPDATEMAP log is
2114 * specifically generated now for logredo()
2115 * to update bmap for free of src relocated page;
2116 * (new flag LOG_RELOCATE may be introduced which will
2117 * inform logredo() to start NORedoPage filter and also
2118 * update block allocation map at the same time, thus
2119 * avoiding an extra log write);
2120 */
2121 lrd->type = cpu_to_le16(LOG_UPDATEMAP);
2122 lrd->log.updatemap.type = cpu_to_le16(LOG_FREEPXD);
2123 lrd->log.updatemap.nxd = cpu_to_le16(1);
2124 lrd->log.updatemap.pxd = pxdlock->pxd;
2125 lrd->backchain = cpu_to_le32(lmLog(log, tblk, lrd, NULL));
2126
2127 /* a maplock for txUpdateMap() for free of the page
2128 * has been formatted at txLock() time;
2129 */
2130 tlck->flag |= tlckUPDATEMAP;
2131 return;
2132 }
2133 /*
2134
2135 * Otherwise it's not a relocate request
2136 *
2137 */
2138 else {
2139 /* log LOG_UPDATEMAP for logredo() to update bmap for
2140 * free of truncated/relocated delta extent of the data;
2141 * e.g.: external EA extent, relocated/truncated extent
2142 * from xtTailgate();
2143 */
2144 lrd->type = cpu_to_le16(LOG_UPDATEMAP);
2145 pxdlock = (struct pxd_lock *) & tlck->lock;
2146 nlock = pxdlock->index;
2147 for (i = 0; i < nlock; i++, pxdlock++) {
2148 if (pxdlock->flag & mlckALLOCPXD)
2149 lrd->log.updatemap.type =
2150 cpu_to_le16(LOG_ALLOCPXD);
2151 else
2152 lrd->log.updatemap.type =
2153 cpu_to_le16(LOG_FREEPXD);
2154 lrd->log.updatemap.nxd = cpu_to_le16(1);
2155 lrd->log.updatemap.pxd = pxdlock->pxd;
2156 lrd->backchain =
2157 cpu_to_le32(lmLog(log, tblk, lrd, NULL));
2158 jfs_info("mapLog: xaddr:0x%lx xlen:0x%x",
2159 (ulong) addressPXD(&pxdlock->pxd),
2160 lengthPXD(&pxdlock->pxd));
2161 }
2162
2163 /* update bmap */
2164 tlck->flag |= tlckUPDATEMAP;
2165 }
2166}
2167
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002169 * txEA()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002170 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002171 * function: acquire maplock for EA/ACL extents or
2172 * set COMMIT_INLINE flag;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173 */
2174void txEA(tid_t tid, struct inode *ip, dxd_t * oldea, dxd_t * newea)
2175{
2176 struct tlock *tlck = NULL;
2177 struct pxd_lock *maplock = NULL, *pxdlock = NULL;
2178
2179 /*
2180 * format maplock for alloc of new EA extent
2181 */
2182 if (newea) {
2183 /* Since the newea could be a completely zeroed entry we need to
2184 * check for the two flags which indicate we should actually
2185 * commit new EA data
2186 */
2187 if (newea->flag & DXD_EXTENT) {
2188 tlck = txMaplock(tid, ip, tlckMAP);
2189 maplock = (struct pxd_lock *) & tlck->lock;
2190 pxdlock = (struct pxd_lock *) maplock;
2191 pxdlock->flag = mlckALLOCPXD;
2192 PXDaddress(&pxdlock->pxd, addressDXD(newea));
2193 PXDlength(&pxdlock->pxd, lengthDXD(newea));
2194 pxdlock++;
2195 maplock->index = 1;
2196 } else if (newea->flag & DXD_INLINE) {
2197 tlck = NULL;
2198
2199 set_cflag(COMMIT_Inlineea, ip);
2200 }
2201 }
2202
2203 /*
2204 * format maplock for free of old EA extent
2205 */
2206 if (!test_cflag(COMMIT_Nolink, ip) && oldea->flag & DXD_EXTENT) {
2207 if (tlck == NULL) {
2208 tlck = txMaplock(tid, ip, tlckMAP);
2209 maplock = (struct pxd_lock *) & tlck->lock;
2210 pxdlock = (struct pxd_lock *) maplock;
2211 maplock->index = 0;
2212 }
2213 pxdlock->flag = mlckFREEPXD;
2214 PXDaddress(&pxdlock->pxd, addressDXD(oldea));
2215 PXDlength(&pxdlock->pxd, lengthDXD(oldea));
2216 maplock->index++;
2217 }
2218}
2219
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002221 * txForce()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222 *
2223 * function: synchronously write pages locked by transaction
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002224 * after txLog() but before txUpdateMap();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002225 */
Dave Kleikamp6cb12692005-09-15 23:25:41 -05002226static void txForce(struct tblock * tblk)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002227{
2228 struct tlock *tlck;
2229 lid_t lid, next;
2230 struct metapage *mp;
2231
2232 /*
2233 * reverse the order of transaction tlocks in
2234 * careful update order of address index pages
2235 * (right to left, bottom up)
2236 */
2237 tlck = lid_to_tlock(tblk->next);
2238 lid = tlck->next;
2239 tlck->next = 0;
2240 while (lid) {
2241 tlck = lid_to_tlock(lid);
2242 next = tlck->next;
2243 tlck->next = tblk->next;
2244 tblk->next = lid;
2245 lid = next;
2246 }
2247
2248 /*
2249 * synchronously write the page, and
2250 * hold the page for txUpdateMap();
2251 */
2252 for (lid = tblk->next; lid; lid = next) {
2253 tlck = lid_to_tlock(lid);
2254 next = tlck->next;
2255
2256 if ((mp = tlck->mp) != NULL &&
2257 (tlck->type & tlckBTROOT) == 0) {
2258 assert(mp->xflag & COMMIT_PAGE);
2259
2260 if (tlck->flag & tlckWRITEPAGE) {
2261 tlck->flag &= ~tlckWRITEPAGE;
2262
2263 /* do not release page to freelist */
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002264 force_metapage(mp);
2265#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002266 /*
2267 * The "right" thing to do here is to
2268 * synchronously write the metadata.
2269 * With the current implementation this
2270 * is hard since write_metapage requires
2271 * us to kunmap & remap the page. If we
2272 * have tlocks pointing into the metadata
2273 * pages, we don't want to do this. I think
2274 * we can get by with synchronously writing
2275 * the pages when they are released.
2276 */
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002277 assert(mp->nohomeok);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002278 set_bit(META_dirty, &mp->flag);
2279 set_bit(META_sync, &mp->flag);
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002280#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07002281 }
2282 }
2283 }
2284}
2285
Linus Torvalds1da177e2005-04-16 15:20:36 -07002286/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002287 * txUpdateMap()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002288 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002289 * function: update persistent allocation map (and working map
2290 * if appropriate);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002291 *
2292 * parameter:
2293 */
2294static void txUpdateMap(struct tblock * tblk)
2295{
2296 struct inode *ip;
2297 struct inode *ipimap;
2298 lid_t lid;
2299 struct tlock *tlck;
2300 struct maplock *maplock;
2301 struct pxd_lock pxdlock;
2302 int maptype;
2303 int k, nlock;
2304 struct metapage *mp = NULL;
2305
2306 ipimap = JFS_SBI(tblk->sb)->ipimap;
2307
2308 maptype = (tblk->xflag & COMMIT_PMAP) ? COMMIT_PMAP : COMMIT_PWMAP;
2309
2310
2311 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002312 * update block allocation map
Linus Torvalds1da177e2005-04-16 15:20:36 -07002313 *
2314 * update allocation state in pmap (and wmap) and
2315 * update lsn of the pmap page;
2316 */
2317 /*
2318 * scan each tlock/page of transaction for block allocation/free:
2319 *
2320 * for each tlock/page of transaction, update map.
2321 * ? are there tlock for pmap and pwmap at the same time ?
2322 */
2323 for (lid = tblk->next; lid; lid = tlck->next) {
2324 tlck = lid_to_tlock(lid);
2325
2326 if ((tlck->flag & tlckUPDATEMAP) == 0)
2327 continue;
2328
2329 if (tlck->flag & tlckFREEPAGE) {
2330 /*
2331 * Another thread may attempt to reuse freed space
2332 * immediately, so we want to get rid of the metapage
2333 * before anyone else has a chance to get it.
2334 * Lock metapage, update maps, then invalidate
2335 * the metapage.
2336 */
2337 mp = tlck->mp;
2338 ASSERT(mp->xflag & COMMIT_PAGE);
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002339 grab_metapage(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340 }
2341
2342 /*
2343 * extent list:
2344 * . in-line PXD list:
2345 * . out-of-line XAD list:
2346 */
2347 maplock = (struct maplock *) & tlck->lock;
2348 nlock = maplock->index;
2349
2350 for (k = 0; k < nlock; k++, maplock++) {
2351 /*
2352 * allocate blocks in persistent map:
2353 *
2354 * blocks have been allocated from wmap at alloc time;
2355 */
2356 if (maplock->flag & mlckALLOC) {
2357 txAllocPMap(ipimap, maplock, tblk);
2358 }
2359 /*
2360 * free blocks in persistent and working map:
2361 * blocks will be freed in pmap and then in wmap;
2362 *
2363 * ? tblock specifies the PMAP/PWMAP based upon
2364 * transaction
2365 *
2366 * free blocks in persistent map:
2367 * blocks will be freed from wmap at last reference
2368 * release of the object for regular files;
2369 *
2370 * Alway free blocks from both persistent & working
2371 * maps for directories
2372 */
2373 else { /* (maplock->flag & mlckFREE) */
2374
Dave Kleikamp438282d2005-09-20 14:58:11 -05002375 if (tlck->flag & tlckDIRECTORY)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002376 txFreeMap(ipimap, maplock,
2377 tblk, COMMIT_PWMAP);
2378 else
2379 txFreeMap(ipimap, maplock,
2380 tblk, maptype);
2381 }
2382 }
2383 if (tlck->flag & tlckFREEPAGE) {
2384 if (!(tblk->flag & tblkGC_LAZY)) {
2385 /* This is equivalent to txRelease */
2386 ASSERT(mp->lid == lid);
2387 tlck->mp->lid = 0;
2388 }
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002389 assert(mp->nohomeok == 1);
2390 metapage_homeok(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391 discard_metapage(mp);
2392 tlck->mp = NULL;
2393 }
2394 }
2395 /*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002396 * update inode allocation map
Linus Torvalds1da177e2005-04-16 15:20:36 -07002397 *
2398 * update allocation state in pmap and
2399 * update lsn of the pmap page;
2400 * update in-memory inode flag/state
2401 *
2402 * unlock mapper/write lock
2403 */
2404 if (tblk->xflag & COMMIT_CREATE) {
Richard Knutsson4d817152006-09-30 23:27:14 -07002405 diUpdatePMap(ipimap, tblk->ino, false, tblk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002406 /* update persistent block allocation map
2407 * for the allocation of inode extent;
2408 */
2409 pxdlock.flag = mlckALLOCPXD;
2410 pxdlock.pxd = tblk->u.ixpxd;
2411 pxdlock.index = 1;
2412 txAllocPMap(ipimap, (struct maplock *) & pxdlock, tblk);
2413 } else if (tblk->xflag & COMMIT_DELETE) {
2414 ip = tblk->u.ip;
Richard Knutsson4d817152006-09-30 23:27:14 -07002415 diUpdatePMap(ipimap, ip->i_ino, true, tblk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002416 iput(ip);
2417 }
2418}
2419
Linus Torvalds1da177e2005-04-16 15:20:36 -07002420/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002421 * txAllocPMap()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002422 *
2423 * function: allocate from persistent map;
2424 *
2425 * parameter:
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002426 * ipbmap -
2427 * malock -
2428 * xad list:
2429 * pxd:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002430 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002431 * maptype -
2432 * allocate from persistent map;
2433 * free from persistent map;
2434 * (e.g., tmp file - free from working map at releae
2435 * of last reference);
2436 * free from persistent and working map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002437 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002438 * lsn - log sequence number;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002439 */
2440static void txAllocPMap(struct inode *ip, struct maplock * maplock,
2441 struct tblock * tblk)
2442{
2443 struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;
2444 struct xdlistlock *xadlistlock;
2445 xad_t *xad;
2446 s64 xaddr;
2447 int xlen;
2448 struct pxd_lock *pxdlock;
2449 struct xdlistlock *pxdlistlock;
2450 pxd_t *pxd;
2451 int n;
2452
2453 /*
2454 * allocate from persistent map;
2455 */
2456 if (maplock->flag & mlckALLOCXADLIST) {
2457 xadlistlock = (struct xdlistlock *) maplock;
2458 xad = xadlistlock->xdlist;
2459 for (n = 0; n < xadlistlock->count; n++, xad++) {
2460 if (xad->flag & (XAD_NEW | XAD_EXTENDED)) {
2461 xaddr = addressXAD(xad);
2462 xlen = lengthXAD(xad);
Richard Knutsson4d817152006-09-30 23:27:14 -07002463 dbUpdatePMap(ipbmap, false, xaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002464 (s64) xlen, tblk);
2465 xad->flag &= ~(XAD_NEW | XAD_EXTENDED);
2466 jfs_info("allocPMap: xaddr:0x%lx xlen:%d",
2467 (ulong) xaddr, xlen);
2468 }
2469 }
2470 } else if (maplock->flag & mlckALLOCPXD) {
2471 pxdlock = (struct pxd_lock *) maplock;
2472 xaddr = addressPXD(&pxdlock->pxd);
2473 xlen = lengthPXD(&pxdlock->pxd);
Richard Knutsson4d817152006-09-30 23:27:14 -07002474 dbUpdatePMap(ipbmap, false, xaddr, (s64) xlen, tblk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002475 jfs_info("allocPMap: xaddr:0x%lx xlen:%d", (ulong) xaddr, xlen);
2476 } else { /* (maplock->flag & mlckALLOCPXDLIST) */
2477
2478 pxdlistlock = (struct xdlistlock *) maplock;
2479 pxd = pxdlistlock->xdlist;
2480 for (n = 0; n < pxdlistlock->count; n++, pxd++) {
2481 xaddr = addressPXD(pxd);
2482 xlen = lengthPXD(pxd);
Richard Knutsson4d817152006-09-30 23:27:14 -07002483 dbUpdatePMap(ipbmap, false, xaddr, (s64) xlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002484 tblk);
2485 jfs_info("allocPMap: xaddr:0x%lx xlen:%d",
2486 (ulong) xaddr, xlen);
2487 }
2488 }
2489}
2490
Linus Torvalds1da177e2005-04-16 15:20:36 -07002491/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002492 * txFreeMap()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002493 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002494 * function: free from persistent and/or working map;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 *
2496 * todo: optimization
2497 */
2498void txFreeMap(struct inode *ip,
2499 struct maplock * maplock, struct tblock * tblk, int maptype)
2500{
2501 struct inode *ipbmap = JFS_SBI(ip->i_sb)->ipbmap;
2502 struct xdlistlock *xadlistlock;
2503 xad_t *xad;
2504 s64 xaddr;
2505 int xlen;
2506 struct pxd_lock *pxdlock;
2507 struct xdlistlock *pxdlistlock;
2508 pxd_t *pxd;
2509 int n;
2510
2511 jfs_info("txFreeMap: tblk:0x%p maplock:0x%p maptype:0x%x",
2512 tblk, maplock, maptype);
2513
2514 /*
2515 * free from persistent map;
2516 */
2517 if (maptype == COMMIT_PMAP || maptype == COMMIT_PWMAP) {
2518 if (maplock->flag & mlckFREEXADLIST) {
2519 xadlistlock = (struct xdlistlock *) maplock;
2520 xad = xadlistlock->xdlist;
2521 for (n = 0; n < xadlistlock->count; n++, xad++) {
2522 if (!(xad->flag & XAD_NEW)) {
2523 xaddr = addressXAD(xad);
2524 xlen = lengthXAD(xad);
Richard Knutsson4d817152006-09-30 23:27:14 -07002525 dbUpdatePMap(ipbmap, true, xaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526 (s64) xlen, tblk);
2527 jfs_info("freePMap: xaddr:0x%lx "
2528 "xlen:%d",
2529 (ulong) xaddr, xlen);
2530 }
2531 }
2532 } else if (maplock->flag & mlckFREEPXD) {
2533 pxdlock = (struct pxd_lock *) maplock;
2534 xaddr = addressPXD(&pxdlock->pxd);
2535 xlen = lengthPXD(&pxdlock->pxd);
Richard Knutsson4d817152006-09-30 23:27:14 -07002536 dbUpdatePMap(ipbmap, true, xaddr, (s64) xlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537 tblk);
2538 jfs_info("freePMap: xaddr:0x%lx xlen:%d",
2539 (ulong) xaddr, xlen);
2540 } else { /* (maplock->flag & mlckALLOCPXDLIST) */
2541
2542 pxdlistlock = (struct xdlistlock *) maplock;
2543 pxd = pxdlistlock->xdlist;
2544 for (n = 0; n < pxdlistlock->count; n++, pxd++) {
2545 xaddr = addressPXD(pxd);
2546 xlen = lengthPXD(pxd);
Richard Knutsson4d817152006-09-30 23:27:14 -07002547 dbUpdatePMap(ipbmap, true, xaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002548 (s64) xlen, tblk);
2549 jfs_info("freePMap: xaddr:0x%lx xlen:%d",
2550 (ulong) xaddr, xlen);
2551 }
2552 }
2553 }
2554
2555 /*
2556 * free from working map;
2557 */
2558 if (maptype == COMMIT_PWMAP || maptype == COMMIT_WMAP) {
2559 if (maplock->flag & mlckFREEXADLIST) {
2560 xadlistlock = (struct xdlistlock *) maplock;
2561 xad = xadlistlock->xdlist;
2562 for (n = 0; n < xadlistlock->count; n++, xad++) {
2563 xaddr = addressXAD(xad);
2564 xlen = lengthXAD(xad);
2565 dbFree(ip, xaddr, (s64) xlen);
2566 xad->flag = 0;
2567 jfs_info("freeWMap: xaddr:0x%lx xlen:%d",
2568 (ulong) xaddr, xlen);
2569 }
2570 } else if (maplock->flag & mlckFREEPXD) {
2571 pxdlock = (struct pxd_lock *) maplock;
2572 xaddr = addressPXD(&pxdlock->pxd);
2573 xlen = lengthPXD(&pxdlock->pxd);
2574 dbFree(ip, xaddr, (s64) xlen);
2575 jfs_info("freeWMap: xaddr:0x%lx xlen:%d",
2576 (ulong) xaddr, xlen);
2577 } else { /* (maplock->flag & mlckFREEPXDLIST) */
2578
2579 pxdlistlock = (struct xdlistlock *) maplock;
2580 pxd = pxdlistlock->xdlist;
2581 for (n = 0; n < pxdlistlock->count; n++, pxd++) {
2582 xaddr = addressPXD(pxd);
2583 xlen = lengthPXD(pxd);
2584 dbFree(ip, xaddr, (s64) xlen);
2585 jfs_info("freeWMap: xaddr:0x%lx xlen:%d",
2586 (ulong) xaddr, xlen);
2587 }
2588 }
2589 }
2590}
2591
Linus Torvalds1da177e2005-04-16 15:20:36 -07002592/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002593 * txFreelock()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002594 *
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002595 * function: remove tlock from inode anonymous locklist
Linus Torvalds1da177e2005-04-16 15:20:36 -07002596 */
2597void txFreelock(struct inode *ip)
2598{
2599 struct jfs_inode_info *jfs_ip = JFS_IP(ip);
2600 struct tlock *xtlck, *tlck;
2601 lid_t xlid = 0, lid;
2602
2603 if (!jfs_ip->atlhead)
2604 return;
2605
2606 TXN_LOCK();
2607 xtlck = (struct tlock *) &jfs_ip->atlhead;
2608
2609 while ((lid = xtlck->next) != 0) {
2610 tlck = lid_to_tlock(lid);
2611 if (tlck->flag & tlckFREELOCK) {
2612 xtlck->next = tlck->next;
2613 txLockFree(lid);
2614 } else {
2615 xtlck = tlck;
2616 xlid = lid;
2617 }
2618 }
2619
2620 if (jfs_ip->atlhead)
2621 jfs_ip->atltail = xlid;
2622 else {
2623 jfs_ip->atltail = 0;
2624 /*
2625 * If inode was on anon_list, remove it
2626 */
2627 list_del_init(&jfs_ip->anon_inode_list);
2628 }
2629 TXN_UNLOCK();
2630}
2631
Linus Torvalds1da177e2005-04-16 15:20:36 -07002632/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002633 * txAbort()
Linus Torvalds1da177e2005-04-16 15:20:36 -07002634 *
2635 * function: abort tx before commit;
2636 *
2637 * frees line-locks and segment locks for all
2638 * segments in comdata structure.
2639 * Optionally sets state of file-system to FM_DIRTY in super-block.
2640 * log age of page-frames in memory for which caller has
2641 * are reset to 0 (to avoid logwarap).
2642 */
2643void txAbort(tid_t tid, int dirty)
2644{
2645 lid_t lid, next;
2646 struct metapage *mp;
2647 struct tblock *tblk = tid_to_tblock(tid);
2648 struct tlock *tlck;
2649
2650 /*
2651 * free tlocks of the transaction
2652 */
2653 for (lid = tblk->next; lid; lid = next) {
2654 tlck = lid_to_tlock(lid);
2655 next = tlck->next;
2656 mp = tlck->mp;
2657 JFS_IP(tlck->ip)->xtlid = 0;
2658
2659 if (mp) {
2660 mp->lid = 0;
2661
2662 /*
2663 * reset lsn of page to avoid logwarap:
2664 *
2665 * (page may have been previously committed by another
2666 * transaction(s) but has not been paged, i.e.,
2667 * it may be on logsync list even though it has not
2668 * been logged for the current tx.)
2669 */
2670 if (mp->xflag & COMMIT_PAGE && mp->lsn)
2671 LogSyncRelease(mp);
2672 }
2673 /* insert tlock at head of freelist */
2674 TXN_LOCK();
2675 txLockFree(lid);
2676 TXN_UNLOCK();
2677 }
2678
2679 /* caller will free the transaction block */
2680
2681 tblk->next = tblk->last = 0;
2682
2683 /*
2684 * mark filesystem dirty
2685 */
2686 if (dirty)
2687 jfs_error(tblk->sb, "txAbort");
2688
2689 return;
2690}
2691
2692/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002693 * txLazyCommit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002694 *
2695 * All transactions except those changing ipimap (COMMIT_FORCE) are
2696 * processed by this routine. This insures that the inode and block
2697 * allocation maps are updated in order. For synchronous transactions,
2698 * let the user thread finish processing after txUpdateMap() is called.
2699 */
2700static void txLazyCommit(struct tblock * tblk)
2701{
2702 struct jfs_log *log;
2703
2704 while (((tblk->flag & tblkGC_READY) == 0) &&
2705 ((tblk->flag & tblkGC_UNLOCKED) == 0)) {
2706 /* We must have gotten ahead of the user thread
2707 */
2708 jfs_info("jfs_lazycommit: tblk 0x%p not unlocked", tblk);
2709 yield();
2710 }
2711
2712 jfs_info("txLazyCommit: processing tblk 0x%p", tblk);
2713
2714 txUpdateMap(tblk);
2715
2716 log = (struct jfs_log *) JFS_SBI(tblk->sb)->log;
2717
2718 spin_lock_irq(&log->gclock); // LOGGC_LOCK
2719
2720 tblk->flag |= tblkGC_COMMITTED;
2721
2722 if (tblk->flag & tblkGC_READY)
2723 log->gcrtc--;
2724
2725 wake_up_all(&tblk->gcwait); // LOGGC_WAKEUP
2726
2727 /*
2728 * Can't release log->gclock until we've tested tblk->flag
2729 */
2730 if (tblk->flag & tblkGC_LAZY) {
2731 spin_unlock_irq(&log->gclock); // LOGGC_UNLOCK
2732 txUnlock(tblk);
2733 tblk->flag &= ~tblkGC_LAZY;
2734 txEnd(tblk - TxBlock); /* Convert back to tid */
2735 } else
2736 spin_unlock_irq(&log->gclock); // LOGGC_UNLOCK
2737
2738 jfs_info("txLazyCommit: done: tblk = 0x%p", tblk);
2739}
2740
2741/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002742 * jfs_lazycommit(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002743 *
2744 * To be run as a kernel daemon. If lbmIODone is called in an interrupt
2745 * context, or where blocking is not wanted, this routine will process
2746 * committed transactions from the unlock queue.
2747 */
2748int jfs_lazycommit(void *arg)
2749{
2750 int WorkDone;
2751 struct tblock *tblk;
2752 unsigned long flags;
2753 struct jfs_sb_info *sbi;
2754
Linus Torvalds1da177e2005-04-16 15:20:36 -07002755 do {
2756 LAZY_LOCK(flags);
2757 jfs_commit_thread_waking = 0; /* OK to wake another thread */
2758 while (!list_empty(&TxAnchor.unlock_queue)) {
2759 WorkDone = 0;
2760 list_for_each_entry(tblk, &TxAnchor.unlock_queue,
2761 cqueue) {
2762
2763 sbi = JFS_SBI(tblk->sb);
2764 /*
2765 * For each volume, the transactions must be
2766 * handled in order. If another commit thread
2767 * is handling a tblk for this superblock,
2768 * skip it
2769 */
2770 if (sbi->commit_state & IN_LAZYCOMMIT)
2771 continue;
2772
2773 sbi->commit_state |= IN_LAZYCOMMIT;
2774 WorkDone = 1;
2775
2776 /*
2777 * Remove transaction from queue
2778 */
2779 list_del(&tblk->cqueue);
2780
2781 LAZY_UNLOCK(flags);
2782 txLazyCommit(tblk);
2783 LAZY_LOCK(flags);
2784
2785 sbi->commit_state &= ~IN_LAZYCOMMIT;
2786 /*
2787 * Don't continue in the for loop. (We can't
2788 * anyway, it's unsafe!) We want to go back to
2789 * the beginning of the list.
2790 */
2791 break;
2792 }
2793
2794 /* If there was nothing to do, don't continue */
2795 if (!WorkDone)
2796 break;
2797 }
2798 /* In case a wakeup came while all threads were active */
2799 jfs_commit_thread_waking = 0;
2800
Christoph Lameter3e1d1d22005-06-24 23:13:50 -07002801 if (freezing(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002802 LAZY_UNLOCK(flags);
Tejun Heoa0acae02011-11-21 12:32:22 -08002803 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002804 } else {
2805 DECLARE_WAITQUEUE(wq, current);
2806
2807 add_wait_queue(&jfs_commit_thread_wait, &wq);
2808 set_current_state(TASK_INTERRUPTIBLE);
2809 LAZY_UNLOCK(flags);
2810 schedule();
Milind Arun Choudhary3cbb1c82007-04-26 07:30:29 -05002811 __set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002812 remove_wait_queue(&jfs_commit_thread_wait, &wq);
2813 }
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06002814 } while (!kthread_should_stop());
Linus Torvalds1da177e2005-04-16 15:20:36 -07002815
2816 if (!list_empty(&TxAnchor.unlock_queue))
2817 jfs_err("jfs_lazycommit being killed w/pending transactions!");
2818 else
2819 jfs_info("jfs_lazycommit being killed\n");
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06002820 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821}
2822
2823void txLazyUnlock(struct tblock * tblk)
2824{
2825 unsigned long flags;
2826
2827 LAZY_LOCK(flags);
2828
2829 list_add_tail(&tblk->cqueue, &TxAnchor.unlock_queue);
2830 /*
2831 * Don't wake up a commit thread if there is already one servicing
2832 * this superblock, or if the last one we woke up hasn't started yet.
2833 */
2834 if (!(JFS_SBI(tblk->sb)->commit_state & IN_LAZYCOMMIT) &&
2835 !jfs_commit_thread_waking) {
2836 jfs_commit_thread_waking = 1;
2837 wake_up(&jfs_commit_thread_wait);
2838 }
2839 LAZY_UNLOCK(flags);
2840}
2841
2842static void LogSyncRelease(struct metapage * mp)
2843{
2844 struct jfs_log *log = mp->log;
2845
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002846 assert(mp->nohomeok);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002847 assert(log);
Dave Kleikamp7fab4792005-05-02 12:25:02 -06002848 metapage_homeok(mp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002849}
2850
2851/*
2852 * txQuiesce
2853 *
2854 * Block all new transactions and push anonymous transactions to
2855 * completion
2856 *
2857 * This does almost the same thing as jfs_sync below. We don't
2858 * worry about deadlocking when jfs_tlocks_low is set, since we would
2859 * expect jfs_sync to get us out of that jam.
2860 */
2861void txQuiesce(struct super_block *sb)
2862{
2863 struct inode *ip;
2864 struct jfs_inode_info *jfs_ip;
2865 struct jfs_log *log = JFS_SBI(sb)->log;
2866 tid_t tid;
2867
2868 set_bit(log_QUIESCE, &log->flag);
2869
2870 TXN_LOCK();
2871restart:
2872 while (!list_empty(&TxAnchor.anon_list)) {
2873 jfs_ip = list_entry(TxAnchor.anon_list.next,
2874 struct jfs_inode_info,
2875 anon_inode_list);
2876 ip = &jfs_ip->vfs_inode;
2877
2878 /*
2879 * inode will be removed from anonymous list
2880 * when it is committed
2881 */
2882 TXN_UNLOCK();
2883 tid = txBegin(ip->i_sb, COMMIT_INODE | COMMIT_FORCE);
Ingo Molnar1de87442006-01-24 15:22:50 -06002884 mutex_lock(&jfs_ip->commit_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002885 txCommit(tid, 1, &ip, 0);
2886 txEnd(tid);
Ingo Molnar1de87442006-01-24 15:22:50 -06002887 mutex_unlock(&jfs_ip->commit_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002888 /*
2889 * Just to be safe. I don't know how
2890 * long we can run without blocking
2891 */
2892 cond_resched();
2893 TXN_LOCK();
2894 }
2895
2896 /*
2897 * If jfs_sync is running in parallel, there could be some inodes
2898 * on anon_list2. Let's check.
2899 */
2900 if (!list_empty(&TxAnchor.anon_list2)) {
2901 list_splice(&TxAnchor.anon_list2, &TxAnchor.anon_list);
2902 INIT_LIST_HEAD(&TxAnchor.anon_list2);
2903 goto restart;
2904 }
2905 TXN_UNLOCK();
2906
2907 /*
2908 * We may need to kick off the group commit
2909 */
2910 jfs_flush_journal(log, 0);
2911}
2912
2913/*
2914 * txResume()
2915 *
2916 * Allows transactions to start again following txQuiesce
2917 */
2918void txResume(struct super_block *sb)
2919{
2920 struct jfs_log *log = JFS_SBI(sb)->log;
2921
2922 clear_bit(log_QUIESCE, &log->flag);
2923 TXN_WAKEUP(&log->syncwait);
2924}
2925
2926/*
Dave Kleikampf720e3b2007-06-06 15:28:35 -05002927 * jfs_sync(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002928 *
2929 * To be run as a kernel daemon. This is awakened when tlocks run low.
2930 * We write any inodes that have anonymous tlocks so they will become
2931 * available.
2932 */
2933int jfs_sync(void *arg)
2934{
2935 struct inode *ip;
2936 struct jfs_inode_info *jfs_ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002937 tid_t tid;
2938
Linus Torvalds1da177e2005-04-16 15:20:36 -07002939 do {
2940 /*
2941 * write each inode on the anonymous inode list
2942 */
2943 TXN_LOCK();
2944 while (jfs_tlocks_low && !list_empty(&TxAnchor.anon_list)) {
2945 jfs_ip = list_entry(TxAnchor.anon_list.next,
2946 struct jfs_inode_info,
2947 anon_inode_list);
2948 ip = &jfs_ip->vfs_inode;
2949
2950 if (! igrab(ip)) {
2951 /*
2952 * Inode is being freed
2953 */
2954 list_del_init(&jfs_ip->anon_inode_list);
Evgeniy Dushistov48ce8b02006-06-05 08:21:03 -05002955 } else if (mutex_trylock(&jfs_ip->commit_mutex)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002956 /*
2957 * inode will be removed from anonymous list
2958 * when it is committed
2959 */
2960 TXN_UNLOCK();
2961 tid = txBegin(ip->i_sb, COMMIT_INODE);
Dave Kleikamp3c2c2262011-06-20 13:00:27 -05002962 txCommit(tid, 1, &ip, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002963 txEnd(tid);
Ingo Molnar1de87442006-01-24 15:22:50 -06002964 mutex_unlock(&jfs_ip->commit_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002965
2966 iput(ip);
2967 /*
2968 * Just to be safe. I don't know how
2969 * long we can run without blocking
2970 */
2971 cond_resched();
2972 TXN_LOCK();
2973 } else {
Ingo Molnar1de87442006-01-24 15:22:50 -06002974 /* We can't get the commit mutex. It may
Linus Torvalds1da177e2005-04-16 15:20:36 -07002975 * be held by a thread waiting for tlock's
2976 * so let's not block here. Save it to
2977 * put back on the anon_list.
2978 */
2979
2980 /* Take off anon_list */
2981 list_del(&jfs_ip->anon_inode_list);
2982
2983 /* Put on anon_list2 */
2984 list_add(&jfs_ip->anon_inode_list,
2985 &TxAnchor.anon_list2);
2986
2987 TXN_UNLOCK();
2988 iput(ip);
2989 TXN_LOCK();
2990 }
2991 }
2992 /* Add anon_list2 back to anon_list */
2993 list_splice_init(&TxAnchor.anon_list2, &TxAnchor.anon_list);
2994
Christoph Lameter3e1d1d22005-06-24 23:13:50 -07002995 if (freezing(current)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002996 TXN_UNLOCK();
Tejun Heoa0acae02011-11-21 12:32:22 -08002997 try_to_freeze();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002998 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002999 set_current_state(TASK_INTERRUPTIBLE);
3000 TXN_UNLOCK();
3001 schedule();
Milind Arun Choudhary3cbb1c82007-04-26 07:30:29 -05003002 __set_current_state(TASK_RUNNING);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003003 }
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06003004 } while (!kthread_should_stop());
Linus Torvalds1da177e2005-04-16 15:20:36 -07003005
3006 jfs_info("jfs_sync being killed");
Christoph Hellwig91dbb4d2006-02-15 12:49:04 -06003007 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003008}
3009
3010#if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_DEBUG)
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003011static int jfs_txanchor_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003012{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003013 char *freewait;
3014 char *freelockwait;
3015 char *lowlockwait;
3016
3017 freewait =
3018 waitqueue_active(&TxAnchor.freewait) ? "active" : "empty";
3019 freelockwait =
3020 waitqueue_active(&TxAnchor.freelockwait) ? "active" : "empty";
3021 lowlockwait =
3022 waitqueue_active(&TxAnchor.lowlockwait) ? "active" : "empty";
3023
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003024 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003025 "JFS TxAnchor\n"
3026 "============\n"
3027 "freetid = %d\n"
3028 "freewait = %s\n"
3029 "freelock = %d\n"
3030 "freelockwait = %s\n"
3031 "lowlockwait = %s\n"
3032 "tlocksInUse = %d\n"
3033 "jfs_tlocks_low = %d\n"
3034 "unlock_queue is %sempty\n",
3035 TxAnchor.freetid,
3036 freewait,
3037 TxAnchor.freelock,
3038 freelockwait,
3039 lowlockwait,
3040 TxAnchor.tlocksInUse,
3041 jfs_tlocks_low,
3042 list_empty(&TxAnchor.unlock_queue) ? "" : "not ");
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003043 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044}
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003045
3046static int jfs_txanchor_proc_open(struct inode *inode, struct file *file)
3047{
3048 return single_open(file, jfs_txanchor_proc_show, NULL);
3049}
3050
3051const struct file_operations jfs_txanchor_proc_fops = {
3052 .owner = THIS_MODULE,
3053 .open = jfs_txanchor_proc_open,
3054 .read = seq_read,
3055 .llseek = seq_lseek,
3056 .release = single_release,
3057};
Linus Torvalds1da177e2005-04-16 15:20:36 -07003058#endif
3059
3060#if defined(CONFIG_PROC_FS) && defined(CONFIG_JFS_STATISTICS)
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003061static int jfs_txstats_proc_show(struct seq_file *m, void *v)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003062{
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003063 seq_printf(m,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003064 "JFS TxStats\n"
3065 "===========\n"
3066 "calls to txBegin = %d\n"
3067 "txBegin blocked by sync barrier = %d\n"
3068 "txBegin blocked by tlocks low = %d\n"
3069 "txBegin blocked by no free tid = %d\n"
3070 "calls to txBeginAnon = %d\n"
3071 "txBeginAnon blocked by sync barrier = %d\n"
3072 "txBeginAnon blocked by tlocks low = %d\n"
3073 "calls to txLockAlloc = %d\n"
3074 "tLockAlloc blocked by no free lock = %d\n",
3075 TxStat.txBegin,
3076 TxStat.txBegin_barrier,
3077 TxStat.txBegin_lockslow,
3078 TxStat.txBegin_freetid,
3079 TxStat.txBeginAnon,
3080 TxStat.txBeginAnon_barrier,
3081 TxStat.txBeginAnon_lockslow,
3082 TxStat.txLockAlloc,
3083 TxStat.txLockAlloc_freelock);
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003084 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003085}
Alexey Dobriyanb2e03ca2008-05-13 08:22:10 -05003086
3087static int jfs_txstats_proc_open(struct inode *inode, struct file *file)
3088{
3089 return single_open(file, jfs_txstats_proc_show, NULL);
3090}
3091
3092const struct file_operations jfs_txstats_proc_fops = {
3093 .owner = THIS_MODULE,
3094 .open = jfs_txstats_proc_open,
3095 .read = seq_read,
3096 .llseek = seq_lseek,
3097 .release = single_release,
3098};
Linus Torvalds1da177e2005-04-16 15:20:36 -07003099#endif