Pull bugzilla-5653 into release branch
[linux-2.6] / fs / xfs / quota / xfs_dquot_item.c
1 /*
2  * Copyright (c) 2000-2003 Silicon Graphics, Inc.
3  * All Rights Reserved.
4  *
5  * This program is free software; you can redistribute it and/or
6  * modify it under the terms of the GNU General Public License as
7  * published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope that it would be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write the Free Software Foundation,
16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
17  */
18 #include "xfs.h"
19 #include "xfs_fs.h"
20 #include "xfs_bit.h"
21 #include "xfs_log.h"
22 #include "xfs_inum.h"
23 #include "xfs_trans.h"
24 #include "xfs_sb.h"
25 #include "xfs_ag.h"
26 #include "xfs_dir.h"
27 #include "xfs_dir2.h"
28 #include "xfs_alloc.h"
29 #include "xfs_dmapi.h"
30 #include "xfs_quota.h"
31 #include "xfs_mount.h"
32 #include "xfs_bmap_btree.h"
33 #include "xfs_alloc_btree.h"
34 #include "xfs_ialloc_btree.h"
35 #include "xfs_dir_sf.h"
36 #include "xfs_dir2_sf.h"
37 #include "xfs_attr_sf.h"
38 #include "xfs_dinode.h"
39 #include "xfs_inode.h"
40 #include "xfs_bmap.h"
41 #include "xfs_btree.h"
42 #include "xfs_ialloc.h"
43 #include "xfs_rtalloc.h"
44 #include "xfs_error.h"
45 #include "xfs_itable.h"
46 #include "xfs_rw.h"
47 #include "xfs_acl.h"
48 #include "xfs_cap.h"
49 #include "xfs_mac.h"
50 #include "xfs_attr.h"
51 #include "xfs_buf_item.h"
52 #include "xfs_trans_priv.h"
53 #include "xfs_qm.h"
54
55 /*
56  * returns the number of iovecs needed to log the given dquot item.
57  */
58 /* ARGSUSED */
59 STATIC uint
60 xfs_qm_dquot_logitem_size(
61         xfs_dq_logitem_t        *logitem)
62 {
63         /*
64          * we need only two iovecs, one for the format, one for the real thing
65          */
66         return (2);
67 }
68
69 /*
70  * fills in the vector of log iovecs for the given dquot log item.
71  */
72 STATIC void
73 xfs_qm_dquot_logitem_format(
74         xfs_dq_logitem_t        *logitem,
75         xfs_log_iovec_t         *logvec)
76 {
77         ASSERT(logitem);
78         ASSERT(logitem->qli_dquot);
79
80         logvec->i_addr = (xfs_caddr_t)&logitem->qli_format;
81         logvec->i_len  = sizeof(xfs_dq_logformat_t);
82         XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_QFORMAT);
83         logvec++;
84         logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core;
85         logvec->i_len  = sizeof(xfs_disk_dquot_t);
86         XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_DQUOT);
87
88         ASSERT(2 == logitem->qli_item.li_desc->lid_size);
89         logitem->qli_format.qlf_size = 2;
90
91 }
92
93 /*
94  * Increment the pin count of the given dquot.
95  * This value is protected by pinlock spinlock in the xQM structure.
96  */
97 STATIC void
98 xfs_qm_dquot_logitem_pin(
99         xfs_dq_logitem_t *logitem)
100 {
101         unsigned long   s;
102         xfs_dquot_t *dqp;
103
104         dqp = logitem->qli_dquot;
105         ASSERT(XFS_DQ_IS_LOCKED(dqp));
106         s = XFS_DQ_PINLOCK(dqp);
107         dqp->q_pincount++;
108         XFS_DQ_PINUNLOCK(dqp, s);
109 }
110
111 /*
112  * Decrement the pin count of the given dquot, and wake up
113  * anyone in xfs_dqwait_unpin() if the count goes to 0.  The
114  * dquot must have been previously pinned with a call to xfs_dqpin().
115  */
116 /* ARGSUSED */
117 STATIC void
118 xfs_qm_dquot_logitem_unpin(
119         xfs_dq_logitem_t *logitem,
120         int               stale)
121 {
122         unsigned long   s;
123         xfs_dquot_t *dqp;
124
125         dqp = logitem->qli_dquot;
126         ASSERT(dqp->q_pincount > 0);
127         s = XFS_DQ_PINLOCK(dqp);
128         dqp->q_pincount--;
129         if (dqp->q_pincount == 0) {
130                 sv_broadcast(&dqp->q_pinwait);
131         }
132         XFS_DQ_PINUNLOCK(dqp, s);
133 }
134
135 /* ARGSUSED */
136 STATIC void
137 xfs_qm_dquot_logitem_unpin_remove(
138         xfs_dq_logitem_t *logitem,
139         xfs_trans_t      *tp)
140 {
141         xfs_qm_dquot_logitem_unpin(logitem, 0);
142 }
143
144 /*
145  * Given the logitem, this writes the corresponding dquot entry to disk
146  * asynchronously. This is called with the dquot entry securely locked;
147  * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot
148  * at the end.
149  */
150 STATIC void
151 xfs_qm_dquot_logitem_push(
152         xfs_dq_logitem_t        *logitem)
153 {
154         xfs_dquot_t     *dqp;
155
156         dqp = logitem->qli_dquot;
157
158         ASSERT(XFS_DQ_IS_LOCKED(dqp));
159         ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp));
160
161         /*
162          * Since we were able to lock the dquot's flush lock and
163          * we found it on the AIL, the dquot must be dirty.  This
164          * is because the dquot is removed from the AIL while still
165          * holding the flush lock in xfs_dqflush_done().  Thus, if
166          * we found it in the AIL and were able to obtain the flush
167          * lock without sleeping, then there must not have been
168          * anyone in the process of flushing the dquot.
169          */
170         xfs_qm_dqflush(dqp, XFS_B_DELWRI);
171         xfs_dqunlock(dqp);
172 }
173
174 /*ARGSUSED*/
175 STATIC xfs_lsn_t
176 xfs_qm_dquot_logitem_committed(
177         xfs_dq_logitem_t        *l,
178         xfs_lsn_t               lsn)
179 {
180         /*
181          * We always re-log the entire dquot when it becomes dirty,
182          * so, the latest copy _is_ the only one that matters.
183          */
184         return (lsn);
185 }
186
187
188 /*
189  * This is called to wait for the given dquot to be unpinned.
190  * Most of these pin/unpin routines are plagiarized from inode code.
191  */
192 void
193 xfs_qm_dqunpin_wait(
194         xfs_dquot_t     *dqp)
195 {
196         SPLDECL(s);
197
198         ASSERT(XFS_DQ_IS_LOCKED(dqp));
199         if (dqp->q_pincount == 0) {
200                 return;
201         }
202
203         /*
204          * Give the log a push so we don't wait here too long.
205          */
206         xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
207         s = XFS_DQ_PINLOCK(dqp);
208         if (dqp->q_pincount == 0) {
209                 XFS_DQ_PINUNLOCK(dqp, s);
210                 return;
211         }
212         sv_wait(&(dqp->q_pinwait), PINOD,
213                 &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s);
214 }
215
216 /*
217  * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that
218  * the dquot is locked by us, but the flush lock isn't. So, here we are
219  * going to see if the relevant dquot buffer is incore, waiting on DELWRI.
220  * If so, we want to push it out to help us take this item off the AIL as soon
221  * as possible.
222  *
223  * We must not be holding the AIL_LOCK at this point. Calling incore() to
224  * search the buffer cache can be a time consuming thing, and AIL_LOCK is a
225  * spinlock.
226  */
227 STATIC void
228 xfs_qm_dquot_logitem_pushbuf(
229         xfs_dq_logitem_t    *qip)
230 {
231         xfs_dquot_t     *dqp;
232         xfs_mount_t     *mp;
233         xfs_buf_t       *bp;
234         uint            dopush;
235
236         dqp = qip->qli_dquot;
237         ASSERT(XFS_DQ_IS_LOCKED(dqp));
238
239         /*
240          * The qli_pushbuf_flag keeps others from
241          * trying to duplicate our effort.
242          */
243         ASSERT(qip->qli_pushbuf_flag != 0);
244         ASSERT(qip->qli_push_owner == current_pid());
245
246         /*
247          * If flushlock isn't locked anymore, chances are that the
248          * inode flush completed and the inode was taken off the AIL.
249          * So, just get out.
250          */
251         if ((valusema(&(dqp->q_flock)) > 0)  ||
252             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
253                 qip->qli_pushbuf_flag = 0;
254                 xfs_dqunlock(dqp);
255                 return;
256         }
257         mp = dqp->q_mount;
258         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
259                     XFS_QI_DQCHUNKLEN(mp),
260                     XFS_INCORE_TRYLOCK);
261         if (bp != NULL) {
262                 if (XFS_BUF_ISDELAYWRITE(bp)) {
263                         dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
264                                   (valusema(&(dqp->q_flock)) <= 0));
265                         qip->qli_pushbuf_flag = 0;
266                         xfs_dqunlock(dqp);
267
268                         if (XFS_BUF_ISPINNED(bp)) {
269                                 xfs_log_force(mp, (xfs_lsn_t)0,
270                                               XFS_LOG_FORCE);
271                         }
272                         if (dopush) {
273 #ifdef XFSRACEDEBUG
274                                 delay_for_intr();
275                                 delay(300);
276 #endif
277                                 xfs_bawrite(mp, bp);
278                         } else {
279                                 xfs_buf_relse(bp);
280                         }
281                 } else {
282                         qip->qli_pushbuf_flag = 0;
283                         xfs_dqunlock(dqp);
284                         xfs_buf_relse(bp);
285                 }
286                 return;
287         }
288
289         qip->qli_pushbuf_flag = 0;
290         xfs_dqunlock(dqp);
291 }
292
293 /*
294  * This is called to attempt to lock the dquot associated with this
295  * dquot log item.  Don't sleep on the dquot lock or the flush lock.
296  * If the flush lock is already held, indicating that the dquot has
297  * been or is in the process of being flushed, then see if we can
298  * find the dquot's buffer in the buffer cache without sleeping.  If
299  * we can and it is marked delayed write, then we want to send it out.
300  * We delay doing so until the push routine, though, to avoid sleeping
301  * in any device strategy routines.
302  */
303 STATIC uint
304 xfs_qm_dquot_logitem_trylock(
305         xfs_dq_logitem_t        *qip)
306 {
307         xfs_dquot_t             *dqp;
308         uint                    retval;
309
310         dqp = qip->qli_dquot;
311         if (dqp->q_pincount > 0)
312                 return (XFS_ITEM_PINNED);
313
314         if (! xfs_qm_dqlock_nowait(dqp))
315                 return (XFS_ITEM_LOCKED);
316
317         retval = XFS_ITEM_SUCCESS;
318         if (! xfs_qm_dqflock_nowait(dqp)) {
319                 /*
320                  * The dquot is already being flushed.  It may have been
321                  * flushed delayed write, however, and we don't want to
322                  * get stuck waiting for that to complete.  So, we want to check
323                  * to see if we can lock the dquot's buffer without sleeping.
324                  * If we can and it is marked for delayed write, then we
325                  * hold it and send it out from the push routine.  We don't
326                  * want to do that now since we might sleep in the device
327                  * strategy routine.  We also don't want to grab the buffer lock
328                  * here because we'd like not to call into the buffer cache
329                  * while holding the AIL_LOCK.
330                  * Make sure to only return PUSHBUF if we set pushbuf_flag
331                  * ourselves.  If someone else is doing it then we don't
332                  * want to go to the push routine and duplicate their efforts.
333                  */
334                 if (qip->qli_pushbuf_flag == 0) {
335                         qip->qli_pushbuf_flag = 1;
336                         ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno);
337 #ifdef DEBUG
338                         qip->qli_push_owner = current_pid();
339 #endif
340                         /*
341                          * The dquot is left locked.
342                          */
343                         retval = XFS_ITEM_PUSHBUF;
344                 } else {
345                         retval = XFS_ITEM_FLUSHING;
346                         xfs_dqunlock_nonotify(dqp);
347                 }
348         }
349
350         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
351         return (retval);
352 }
353
354
355 /*
356  * Unlock the dquot associated with the log item.
357  * Clear the fields of the dquot and dquot log item that
358  * are specific to the current transaction.  If the
359  * hold flags is set, do not unlock the dquot.
360  */
361 STATIC void
362 xfs_qm_dquot_logitem_unlock(
363         xfs_dq_logitem_t    *ql)
364 {
365         xfs_dquot_t     *dqp;
366
367         ASSERT(ql != NULL);
368         dqp = ql->qli_dquot;
369         ASSERT(XFS_DQ_IS_LOCKED(dqp));
370
371         /*
372          * Clear the transaction pointer in the dquot
373          */
374         dqp->q_transp = NULL;
375
376         /*
377          * dquots are never 'held' from getting unlocked at the end of
378          * a transaction.  Their locking and unlocking is hidden inside the
379          * transaction layer, within trans_commit. Hence, no LI_HOLD flag
380          * for the logitem.
381          */
382         xfs_dqunlock(dqp);
383 }
384
385
386 /*
387  * The transaction with the dquot locked has aborted.  The dquot
388  * must not be dirty within the transaction.  We simply unlock just
389  * as if the transaction had been cancelled.
390  */
391 STATIC void
392 xfs_qm_dquot_logitem_abort(
393         xfs_dq_logitem_t    *ql)
394 {
395         xfs_qm_dquot_logitem_unlock(ql);
396 }
397
398 /*
399  * this needs to stamp an lsn into the dquot, I think.
400  * rpc's that look at user dquot's would then have to
401  * push on the dependency recorded in the dquot
402  */
403 /* ARGSUSED */
404 STATIC void
405 xfs_qm_dquot_logitem_committing(
406         xfs_dq_logitem_t        *l,
407         xfs_lsn_t               lsn)
408 {
409         return;
410 }
411
412
413 /*
414  * This is the ops vector for dquots
415  */
416 STATIC struct xfs_item_ops xfs_dquot_item_ops = {
417         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
418         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
419                                         xfs_qm_dquot_logitem_format,
420         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
421         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
422                                         xfs_qm_dquot_logitem_unpin,
423         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
424                                         xfs_qm_dquot_logitem_unpin_remove,
425         .iop_trylock    = (uint(*)(xfs_log_item_t*))
426                                         xfs_qm_dquot_logitem_trylock,
427         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
428         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
429                                         xfs_qm_dquot_logitem_committed,
430         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
431         .iop_abort      = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_abort,
432         .iop_pushbuf    = (void(*)(xfs_log_item_t*))
433                                         xfs_qm_dquot_logitem_pushbuf,
434         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
435                                         xfs_qm_dquot_logitem_committing
436 };
437
438 /*
439  * Initialize the dquot log item for a newly allocated dquot.
440  * The dquot isn't locked at this point, but it isn't on any of the lists
441  * either, so we don't care.
442  */
443 void
444 xfs_qm_dquot_logitem_init(
445         struct xfs_dquot *dqp)
446 {
447         xfs_dq_logitem_t  *lp;
448         lp = &dqp->q_logitem;
449
450         lp->qli_item.li_type = XFS_LI_DQUOT;
451         lp->qli_item.li_ops = &xfs_dquot_item_ops;
452         lp->qli_item.li_mountp = dqp->q_mount;
453         lp->qli_dquot = dqp;
454         lp->qli_format.qlf_type = XFS_LI_DQUOT;
455         lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
456         lp->qli_format.qlf_blkno = dqp->q_blkno;
457         lp->qli_format.qlf_len = 1;
458         /*
459          * This is just the offset of this dquot within its buffer
460          * (which is currently 1 FSB and probably won't change).
461          * Hence 32 bits for this offset should be just fine.
462          * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
463          * here, and recompute it at recovery time.
464          */
465         lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
466 }
467
468 /*------------------  QUOTAOFF LOG ITEMS  -------------------*/
469
470 /*
471  * This returns the number of iovecs needed to log the given quotaoff item.
472  * We only need 1 iovec for an quotaoff item.  It just logs the
473  * quotaoff_log_format structure.
474  */
475 /*ARGSUSED*/
476 STATIC uint
477 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
478 {
479         return (1);
480 }
481
482 /*
483  * This is called to fill in the vector of log iovecs for the
484  * given quotaoff log item. We use only 1 iovec, and we point that
485  * at the quotaoff_log_format structure embedded in the quotaoff item.
486  * It is at this point that we assert that all of the extent
487  * slots in the quotaoff item have been filled.
488  */
489 STATIC void
490 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t   *qf,
491                            xfs_log_iovec_t      *log_vector)
492 {
493         ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
494
495         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
496         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
497         XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF);
498         qf->qql_format.qf_size = 1;
499 }
500
501
502 /*
503  * Pinning has no meaning for an quotaoff item, so just return.
504  */
505 /*ARGSUSED*/
506 STATIC void
507 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
508 {
509         return;
510 }
511
512
513 /*
514  * Since pinning has no meaning for an quotaoff item, unpinning does
515  * not either.
516  */
517 /*ARGSUSED*/
518 STATIC void
519 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale)
520 {
521         return;
522 }
523
524 /*ARGSUSED*/
525 STATIC void
526 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
527 {
528         return;
529 }
530
531 /*
532  * Quotaoff items have no locking, so just return success.
533  */
534 /*ARGSUSED*/
535 STATIC uint
536 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
537 {
538         return XFS_ITEM_LOCKED;
539 }
540
541 /*
542  * Quotaoff items have no locking or pushing, so return failure
543  * so that the caller doesn't bother with us.
544  */
545 /*ARGSUSED*/
546 STATIC void
547 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
548 {
549         return;
550 }
551
552 /*
553  * The quotaoff-start-item is logged only once and cannot be moved in the log,
554  * so simply return the lsn at which it's been logged.
555  */
556 /*ARGSUSED*/
557 STATIC xfs_lsn_t
558 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
559 {
560         return (lsn);
561 }
562
563 /*
564  * The transaction of which this QUOTAOFF is a part has been aborted.
565  * Just clean up after ourselves.
566  * Shouldn't this never happen in the case of qoffend logitems? XXX
567  */
568 STATIC void
569 xfs_qm_qoff_logitem_abort(xfs_qoff_logitem_t *qf)
570 {
571         kmem_free(qf, sizeof(xfs_qoff_logitem_t));
572 }
573
574 /*
575  * There isn't much you can do to push on an quotaoff item.  It is simply
576  * stuck waiting for the log to be flushed to disk.
577  */
578 /*ARGSUSED*/
579 STATIC void
580 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
581 {
582         return;
583 }
584
585
586 /*ARGSUSED*/
587 STATIC xfs_lsn_t
588 xfs_qm_qoffend_logitem_committed(
589         xfs_qoff_logitem_t *qfe,
590         xfs_lsn_t lsn)
591 {
592         xfs_qoff_logitem_t      *qfs;
593         SPLDECL(s);
594
595         qfs = qfe->qql_start_lip;
596         AIL_LOCK(qfs->qql_item.li_mountp,s);
597         /*
598          * Delete the qoff-start logitem from the AIL.
599          * xfs_trans_delete_ail() drops the AIL lock.
600          */
601         xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs, s);
602         kmem_free(qfs, sizeof(xfs_qoff_logitem_t));
603         kmem_free(qfe, sizeof(xfs_qoff_logitem_t));
604         return (xfs_lsn_t)-1;
605 }
606
607 /*
608  * XXX rcc - don't know quite what to do with this.  I think we can
609  * just ignore it.  The only time that isn't the case is if we allow
610  * the client to somehow see that quotas have been turned off in which
611  * we can't allow that to get back until the quotaoff hits the disk.
612  * So how would that happen?  Also, do we need different routines for
613  * quotaoff start and quotaoff end?  I suspect the answer is yes but
614  * to be sure, I need to look at the recovery code and see how quota off
615  * recovery is handled (do we roll forward or back or do something else).
616  * If we roll forwards or backwards, then we need two separate routines,
617  * one that does nothing and one that stamps in the lsn that matters
618  * (truly makes the quotaoff irrevocable).  If we do something else,
619  * then maybe we don't need two.
620  */
621 /* ARGSUSED */
622 STATIC void
623 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
624 {
625         return;
626 }
627
628 /* ARGSUSED */
629 STATIC void
630 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
631 {
632         return;
633 }
634
635 STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
636         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
637         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
638                                         xfs_qm_qoff_logitem_format,
639         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
640         .iop_unpin      = (void(*)(xfs_log_item_t* ,int))
641                                         xfs_qm_qoff_logitem_unpin,
642         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
643                                         xfs_qm_qoff_logitem_unpin_remove,
644         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
645         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
646         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
647                                         xfs_qm_qoffend_logitem_committed,
648         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
649         .iop_abort      = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort,
650         .iop_pushbuf    = NULL,
651         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
652                                         xfs_qm_qoffend_logitem_committing
653 };
654
655 /*
656  * This is the ops vector shared by all quotaoff-start log items.
657  */
658 STATIC struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
659         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
660         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
661                                         xfs_qm_qoff_logitem_format,
662         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
663         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
664                                         xfs_qm_qoff_logitem_unpin,
665         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
666                                         xfs_qm_qoff_logitem_unpin_remove,
667         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
668         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
669         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
670                                         xfs_qm_qoff_logitem_committed,
671         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
672         .iop_abort      = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort,
673         .iop_pushbuf    = NULL,
674         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
675                                         xfs_qm_qoff_logitem_committing
676 };
677
678 /*
679  * Allocate and initialize an quotaoff item of the correct quota type(s).
680  */
681 xfs_qoff_logitem_t *
682 xfs_qm_qoff_logitem_init(
683         struct xfs_mount *mp,
684         xfs_qoff_logitem_t *start,
685         uint flags)
686 {
687         xfs_qoff_logitem_t      *qf;
688
689         qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
690
691         qf->qql_item.li_type = XFS_LI_QUOTAOFF;
692         if (start)
693                 qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops;
694         else
695                 qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops;
696         qf->qql_item.li_mountp = mp;
697         qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
698         qf->qql_format.qf_flags = flags;
699         qf->qql_start_lip = start;
700         return (qf);
701 }