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_dir2.h"
  27 #include "xfs_alloc.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_quota.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_bmap_btree.h"
  32 #include "xfs_alloc_btree.h"
  33 #include "xfs_ialloc_btree.h"
  34 #include "xfs_dir2_sf.h"
  35 #include "xfs_attr_sf.h"
  36 #include "xfs_dinode.h"
  37 #include "xfs_inode.h"
  38 #include "xfs_bmap.h"
  39 #include "xfs_btree.h"
  40 #include "xfs_ialloc.h"
  41 #include "xfs_rtalloc.h"
  42 #include "xfs_error.h"
  43 #include "xfs_itable.h"
  44 #include "xfs_rw.h"
  45 #include "xfs_attr.h"
  46 #include "xfs_buf_item.h"
  47 #include "xfs_trans_priv.h"
  48 #include "xfs_qm.h"
  49
  50 /*
  51  * returns the number of iovecs needed to log the given dquot item.
  52  */
  53 /* ARGSUSED */
  54 STATIC uint
  55 xfs_qm_dquot_logitem_size(
  56         xfs_dq_logitem_t        *logitem)
  57 {
  58         /*
  59          * we need only two iovecs, one for the format, one for the real thing
  60          */
  61         return (2);
  62 }
  63
  64 /*
  65  * fills in the vector of log iovecs for the given dquot log item.
  66  */
  67 STATIC void
  68 xfs_qm_dquot_logitem_format(
  69         xfs_dq_logitem_t        *logitem,
  70         xfs_log_iovec_t         *logvec)
  71 {
  72         ASSERT(logitem);
  73         ASSERT(logitem->qli_dquot);
  74
  75         logvec->i_addr = (xfs_caddr_t)&logitem->qli_format;
  76         logvec->i_len  = sizeof(xfs_dq_logformat_t);
  77         XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_QFORMAT);
  78         logvec++;
  79         logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core;
  80         logvec->i_len  = sizeof(xfs_disk_dquot_t);
  81         XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_DQUOT);
  82
  83         ASSERT(2 == logitem->qli_item.li_desc->lid_size);
  84         logitem->qli_format.qlf_size = 2;
  85
  86 }
  87
  88 /*
  89  * Increment the pin count of the given dquot.
  90  */
  91 STATIC void
  92 xfs_qm_dquot_logitem_pin(
  93         xfs_dq_logitem_t *logitem)
  94 {
  95         xfs_dquot_t *dqp = logitem->qli_dquot;
  96
  97         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  98         atomic_inc(&dqp->q_pincount);
  99 }
 100
 101 /*
 102  * Decrement the pin count of the given dquot, and wake up
 103  * anyone in xfs_dqwait_unpin() if the count goes to 0.  The
 104  * dquot must have been previously pinned with a call to
 105  * xfs_qm_dquot_logitem_pin().
 106  */
 107 /* ARGSUSED */
 108 STATIC void
 109 xfs_qm_dquot_logitem_unpin(
 110         xfs_dq_logitem_t *logitem,
 111         int               stale)
 112 {
 113         xfs_dquot_t *dqp = logitem->qli_dquot;
 114
 115         ASSERT(atomic_read(&dqp->q_pincount) > 0);
 116         if (atomic_dec_and_test(&dqp->q_pincount))
 117                 wake_up(&dqp->q_pinwait);
 118 }
 119
 120 /* ARGSUSED */
 121 STATIC void
 122 xfs_qm_dquot_logitem_unpin_remove(
 123         xfs_dq_logitem_t *logitem,
 124         xfs_trans_t      *tp)
 125 {
 126         xfs_qm_dquot_logitem_unpin(logitem, 0);
 127 }
 128
 129 /*
 130  * Given the logitem, this writes the corresponding dquot entry to disk
 131  * asynchronously. This is called with the dquot entry securely locked;
 132  * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot
 133  * at the end.
 134  */
 135 STATIC void
 136 xfs_qm_dquot_logitem_push(
 137         xfs_dq_logitem_t        *logitem)
 138 {
 139         xfs_dquot_t     *dqp;
 140         int             error;
 141
 142         dqp = logitem->qli_dquot;
 143
 144         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 145         ASSERT(!completion_done(&dqp->q_flush));
 146
 147         /*
 148          * Since we were able to lock the dquot's flush lock and
 149          * we found it on the AIL, the dquot must be dirty.  This
 150          * is because the dquot is removed from the AIL while still
 151          * holding the flush lock in xfs_dqflush_done().  Thus, if
 152          * we found it in the AIL and were able to obtain the flush
 153          * lock without sleeping, then there must not have been
 154          * anyone in the process of flushing the dquot.
 155          */
 156         error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
 157         if (error)
 158                 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
 159                         "xfs_qm_dquot_logitem_push: push error %d on dqp %p",
 160                         error, dqp);
 161         xfs_dqunlock(dqp);
 162 }
 163
 164 /*ARGSUSED*/
 165 STATIC xfs_lsn_t
 166 xfs_qm_dquot_logitem_committed(
 167         xfs_dq_logitem_t        *l,
 168         xfs_lsn_t               lsn)
 169 {
 170         /*
 171          * We always re-log the entire dquot when it becomes dirty,
 172          * so, the latest copy _is_ the only one that matters.
 173          */
 174         return (lsn);
 175 }
 176
 177
 178 /*
 179  * This is called to wait for the given dquot to be unpinned.
 180  * Most of these pin/unpin routines are plagiarized from inode code.
 181  */
 182 void
 183 xfs_qm_dqunpin_wait(
 184         xfs_dquot_t     *dqp)
 185 {
 186         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 187         if (atomic_read(&dqp->q_pincount) == 0)
 188                 return;
 189
 190         /*
 191          * Give the log a push so we don't wait here too long.
 192          */
 193         xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
 194         wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
 195 }
 196
 197 /*
 198  * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that
 199  * the dquot is locked by us, but the flush lock isn't. So, here we are
 200  * going to see if the relevant dquot buffer is incore, waiting on DELWRI.
 201  * If so, we want to push it out to help us take this item off the AIL as soon
 202  * as possible.
 203  *
 204  * We must not be holding the AIL lock at this point. Calling incore() to
 205  * search the buffer cache can be a time consuming thing, and AIL lock is a
 206  * spinlock.
 207  */
 208 STATIC void
 209 xfs_qm_dquot_logitem_pushbuf(
 210         xfs_dq_logitem_t    *qip)
 211 {
 212         xfs_dquot_t     *dqp;
 213         xfs_mount_t     *mp;
 214         xfs_buf_t       *bp;
 215         uint            dopush;
 216
 217         dqp = qip->qli_dquot;
 218         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 219
 220         /*
 221          * The qli_pushbuf_flag keeps others from
 222          * trying to duplicate our effort.
 223          */
 224         ASSERT(qip->qli_pushbuf_flag != 0);
 225         ASSERT(qip->qli_push_owner == current_pid());
 226
 227         /*
 228          * If flushlock isn't locked anymore, chances are that the
 229          * inode flush completed and the inode was taken off the AIL.
 230          * So, just get out.
 231          */
 232         if (completion_done(&dqp->q_flush)  ||
 233             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 234                 qip->qli_pushbuf_flag = 0;
 235                 xfs_dqunlock(dqp);
 236                 return;
 237         }
 238         mp = dqp->q_mount;
 239         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
 240                     XFS_QI_DQCHUNKLEN(mp), XBF_TRYLOCK);
 241         if (bp != NULL) {
 242                 if (XFS_BUF_ISDELAYWRITE(bp)) {
 243                         dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
 244                                   !completion_done(&dqp->q_flush));
 245                         qip->qli_pushbuf_flag = 0;
 246                         xfs_dqunlock(dqp);
 247
 248                         if (XFS_BUF_ISPINNED(bp)) {
 249                                 xfs_log_force(mp, (xfs_lsn_t)0,
 250                                               XFS_LOG_FORCE);
 251                         }
 252                         if (dopush) {
 253                                 int     error;
 254 #ifdef XFSRACEDEBUG
 255                                 delay_for_intr();
 256                                 delay(300);
 257 #endif
 258                                 error = xfs_bawrite(mp, bp);
 259                                 if (error)
 260                                         xfs_fs_cmn_err(CE_WARN, mp,
 261         "xfs_qm_dquot_logitem_pushbuf: pushbuf error %d on qip %p, bp %p",
 262                                                         error, qip, bp);
 263                         } else {
 264                                 xfs_buf_relse(bp);
 265                         }
 266                 } else {
 267                         qip->qli_pushbuf_flag = 0;
 268                         xfs_dqunlock(dqp);
 269                         xfs_buf_relse(bp);
 270                 }
 271                 return;
 272         }
 273
 274         qip->qli_pushbuf_flag = 0;
 275         xfs_dqunlock(dqp);
 276 }
 277
 278 /*
 279  * This is called to attempt to lock the dquot associated with this
 280  * dquot log item.  Don't sleep on the dquot lock or the flush lock.
 281  * If the flush lock is already held, indicating that the dquot has
 282  * been or is in the process of being flushed, then see if we can
 283  * find the dquot's buffer in the buffer cache without sleeping.  If
 284  * we can and it is marked delayed write, then we want to send it out.
 285  * We delay doing so until the push routine, though, to avoid sleeping
 286  * in any device strategy routines.
 287  */
 288 STATIC uint
 289 xfs_qm_dquot_logitem_trylock(
 290         xfs_dq_logitem_t        *qip)
 291 {
 292         xfs_dquot_t             *dqp;
 293         uint                    retval;
 294
 295         dqp = qip->qli_dquot;
 296         if (atomic_read(&dqp->q_pincount) > 0)
 297                 return (XFS_ITEM_PINNED);
 298
 299         if (! xfs_qm_dqlock_nowait(dqp))
 300                 return (XFS_ITEM_LOCKED);
 301
 302         retval = XFS_ITEM_SUCCESS;
 303         if (!xfs_dqflock_nowait(dqp)) {
 304                 /*
 305                  * The dquot is already being flushed.  It may have been
 306                  * flushed delayed write, however, and we don't want to
 307                  * get stuck waiting for that to complete.  So, we want to check
 308                  * to see if we can lock the dquot's buffer without sleeping.
 309                  * If we can and it is marked for delayed write, then we
 310                  * hold it and send it out from the push routine.  We don't
 311                  * want to do that now since we might sleep in the device
 312                  * strategy routine.  We also don't want to grab the buffer lock
 313                  * here because we'd like not to call into the buffer cache
 314                  * while holding the AIL lock.
 315                  * Make sure to only return PUSHBUF if we set pushbuf_flag
 316                  * ourselves.  If someone else is doing it then we don't
 317                  * want to go to the push routine and duplicate their efforts.
 318                  */
 319                 if (qip->qli_pushbuf_flag == 0) {
 320                         qip->qli_pushbuf_flag = 1;
 321                         ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno);
 322 #ifdef DEBUG
 323                         qip->qli_push_owner = current_pid();
 324 #endif
 325                         /*
 326                          * The dquot is left locked.
 327                          */
 328                         retval = XFS_ITEM_PUSHBUF;
 329                 } else {
 330                         retval = XFS_ITEM_FLUSHING;
 331                         xfs_dqunlock_nonotify(dqp);
 332                 }
 333         }
 334
 335         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
 336         return (retval);
 337 }
 338
 339
 340 /*
 341  * Unlock the dquot associated with the log item.
 342  * Clear the fields of the dquot and dquot log item that
 343  * are specific to the current transaction.  If the
 344  * hold flags is set, do not unlock the dquot.
 345  */
 346 STATIC void
 347 xfs_qm_dquot_logitem_unlock(
 348         xfs_dq_logitem_t    *ql)
 349 {
 350         xfs_dquot_t     *dqp;
 351
 352         ASSERT(ql != NULL);
 353         dqp = ql->qli_dquot;
 354         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 355
 356         /*
 357          * Clear the transaction pointer in the dquot
 358          */
 359         dqp->q_transp = NULL;
 360
 361         /*
 362          * dquots are never 'held' from getting unlocked at the end of
 363          * a transaction.  Their locking and unlocking is hidden inside the
 364          * transaction layer, within trans_commit. Hence, no LI_HOLD flag
 365          * for the logitem.
 366          */
 367         xfs_dqunlock(dqp);
 368 }
 369
 370
 371 /*
 372  * this needs to stamp an lsn into the dquot, I think.
 373  * rpc's that look at user dquot's would then have to
 374  * push on the dependency recorded in the dquot
 375  */
 376 /* ARGSUSED */
 377 STATIC void
 378 xfs_qm_dquot_logitem_committing(
 379         xfs_dq_logitem_t        *l,
 380         xfs_lsn_t               lsn)
 381 {
 382         return;
 383 }
 384
 385
 386 /*
 387  * This is the ops vector for dquots
 388  */
 389 static struct xfs_item_ops xfs_dquot_item_ops = {
 390         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
 391         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 392                                         xfs_qm_dquot_logitem_format,
 393         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
 394         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 395                                         xfs_qm_dquot_logitem_unpin,
 396         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 397                                         xfs_qm_dquot_logitem_unpin_remove,
 398         .iop_trylock    = (uint(*)(xfs_log_item_t*))
 399                                         xfs_qm_dquot_logitem_trylock,
 400         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
 401         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 402                                         xfs_qm_dquot_logitem_committed,
 403         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
 404         .iop_pushbuf    = (void(*)(xfs_log_item_t*))
 405                                         xfs_qm_dquot_logitem_pushbuf,
 406         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 407                                         xfs_qm_dquot_logitem_committing
 408 };
 409
 410 /*
 411  * Initialize the dquot log item for a newly allocated dquot.
 412  * The dquot isn't locked at this point, but it isn't on any of the lists
 413  * either, so we don't care.
 414  */
 415 void
 416 xfs_qm_dquot_logitem_init(
 417         struct xfs_dquot *dqp)
 418 {
 419         xfs_dq_logitem_t  *lp;
 420         lp = &dqp->q_logitem;
 421
 422         lp->qli_item.li_type = XFS_LI_DQUOT;
 423         lp->qli_item.li_ops = &xfs_dquot_item_ops;
 424         lp->qli_item.li_mountp = dqp->q_mount;
 425         lp->qli_dquot = dqp;
 426         lp->qli_format.qlf_type = XFS_LI_DQUOT;
 427         lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
 428         lp->qli_format.qlf_blkno = dqp->q_blkno;
 429         lp->qli_format.qlf_len = 1;
 430         /*
 431          * This is just the offset of this dquot within its buffer
 432          * (which is currently 1 FSB and probably won't change).
 433          * Hence 32 bits for this offset should be just fine.
 434          * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
 435          * here, and recompute it at recovery time.
 436          */
 437         lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
 438 }
 439
 440 /*------------------  QUOTAOFF LOG ITEMS  -------------------*/
 441
 442 /*
 443  * This returns the number of iovecs needed to log the given quotaoff item.
 444  * We only need 1 iovec for an quotaoff item.  It just logs the
 445  * quotaoff_log_format structure.
 446  */
 447 /*ARGSUSED*/
 448 STATIC uint
 449 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
 450 {
 451         return (1);
 452 }
 453
 454 /*
 455  * This is called to fill in the vector of log iovecs for the
 456  * given quotaoff log item. We use only 1 iovec, and we point that
 457  * at the quotaoff_log_format structure embedded in the quotaoff item.
 458  * It is at this point that we assert that all of the extent
 459  * slots in the quotaoff item have been filled.
 460  */
 461 STATIC void
 462 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t   *qf,
 463                            xfs_log_iovec_t      *log_vector)
 464 {
 465         ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
 466
 467         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
 468         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
 469         XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF);
 470         qf->qql_format.qf_size = 1;
 471 }
 472
 473
 474 /*
 475  * Pinning has no meaning for an quotaoff item, so just return.
 476  */
 477 /*ARGSUSED*/
 478 STATIC void
 479 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
 480 {
 481         return;
 482 }
 483
 484
 485 /*
 486  * Since pinning has no meaning for an quotaoff item, unpinning does
 487  * not either.
 488  */
 489 /*ARGSUSED*/
 490 STATIC void
 491 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale)
 492 {
 493         return;
 494 }
 495
 496 /*ARGSUSED*/
 497 STATIC void
 498 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
 499 {
 500         return;
 501 }
 502
 503 /*
 504  * Quotaoff items have no locking, so just return success.
 505  */
 506 /*ARGSUSED*/
 507 STATIC uint
 508 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
 509 {
 510         return XFS_ITEM_LOCKED;
 511 }
 512
 513 /*
 514  * Quotaoff items have no locking or pushing, so return failure
 515  * so that the caller doesn't bother with us.
 516  */
 517 /*ARGSUSED*/
 518 STATIC void
 519 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
 520 {
 521         return;
 522 }
 523
 524 /*
 525  * The quotaoff-start-item is logged only once and cannot be moved in the log,
 526  * so simply return the lsn at which it's been logged.
 527  */
 528 /*ARGSUSED*/
 529 STATIC xfs_lsn_t
 530 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
 531 {
 532         return (lsn);
 533 }
 534
 535 /*
 536  * There isn't much you can do to push on an quotaoff item.  It is simply
 537  * stuck waiting for the log to be flushed to disk.
 538  */
 539 /*ARGSUSED*/
 540 STATIC void
 541 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
 542 {
 543         return;
 544 }
 545
 546
 547 /*ARGSUSED*/
 548 STATIC xfs_lsn_t
 549 xfs_qm_qoffend_logitem_committed(
 550         xfs_qoff_logitem_t *qfe,
 551         xfs_lsn_t lsn)
 552 {
 553         xfs_qoff_logitem_t      *qfs;
 554         struct xfs_ail          *ailp;
 555
 556         qfs = qfe->qql_start_lip;
 557         ailp = qfs->qql_item.li_ailp;
 558         spin_lock(&ailp->xa_lock);
 559         /*
 560          * Delete the qoff-start logitem from the AIL.
 561          * xfs_trans_ail_delete() drops the AIL lock.
 562          */
 563         xfs_trans_ail_delete(ailp, (xfs_log_item_t *)qfs);
 564         kmem_free(qfs);
 565         kmem_free(qfe);
 566         return (xfs_lsn_t)-1;
 567 }
 568
 569 /*
 570  * XXX rcc - don't know quite what to do with this.  I think we can
 571  * just ignore it.  The only time that isn't the case is if we allow
 572  * the client to somehow see that quotas have been turned off in which
 573  * we can't allow that to get back until the quotaoff hits the disk.
 574  * So how would that happen?  Also, do we need different routines for
 575  * quotaoff start and quotaoff end?  I suspect the answer is yes but
 576  * to be sure, I need to look at the recovery code and see how quota off
 577  * recovery is handled (do we roll forward or back or do something else).
 578  * If we roll forwards or backwards, then we need two separate routines,
 579  * one that does nothing and one that stamps in the lsn that matters
 580  * (truly makes the quotaoff irrevocable).  If we do something else,
 581  * then maybe we don't need two.
 582  */
 583 /* ARGSUSED */
 584 STATIC void
 585 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 586 {
 587         return;
 588 }
 589
 590 /* ARGSUSED */
 591 STATIC void
 592 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 593 {
 594         return;
 595 }
 596
 597 static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 598         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 599         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 600                                         xfs_qm_qoff_logitem_format,
 601         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 602         .iop_unpin      = (void(*)(xfs_log_item_t* ,int))
 603                                         xfs_qm_qoff_logitem_unpin,
 604         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 605                                         xfs_qm_qoff_logitem_unpin_remove,
 606         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 607         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 608         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 609                                         xfs_qm_qoffend_logitem_committed,
 610         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 611         .iop_pushbuf    = NULL,
 612         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 613                                         xfs_qm_qoffend_logitem_committing
 614 };
 615
 616 /*
 617  * This is the ops vector shared by all quotaoff-start log items.
 618  */
 619 static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 620         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 621         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 622                                         xfs_qm_qoff_logitem_format,
 623         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 624         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 625                                         xfs_qm_qoff_logitem_unpin,
 626         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 627                                         xfs_qm_qoff_logitem_unpin_remove,
 628         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 629         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 630         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 631                                         xfs_qm_qoff_logitem_committed,
 632         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 633         .iop_pushbuf    = NULL,
 634         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 635                                         xfs_qm_qoff_logitem_committing
 636 };
 637
 638 /*
 639  * Allocate and initialize an quotaoff item of the correct quota type(s).
 640  */
 641 xfs_qoff_logitem_t *
 642 xfs_qm_qoff_logitem_init(
 643         struct xfs_mount *mp,
 644         xfs_qoff_logitem_t *start,
 645         uint flags)
 646 {
 647         xfs_qoff_logitem_t      *qf;
 648
 649         qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
 650
 651         qf->qql_item.li_type = XFS_LI_QUOTAOFF;
 652         if (start)
 653                 qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops;
 654         else
 655                 qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops;
 656         qf->qql_item.li_mountp = mp;
 657         qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
 658         qf->qql_format.qf_flags = flags;
 659         qf->qql_start_lip = start;
 660         return (qf);
 661 }