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         logvec->i_type = 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         logvec->i_type = 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, 0);
 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, 0);
 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
 216         dqp = qip->qli_dquot;
 217         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 218
 219         /*
 220          * If flushlock isn't locked anymore, chances are that the
 221          * inode flush completed and the inode was taken off the AIL.
 222          * So, just get out.
 223          */
 224         if (completion_done(&dqp->q_flush)  ||
 225             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 226                 xfs_dqunlock(dqp);
 227                 return;
 228         }
 229         mp = dqp->q_mount;
 230         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
 231                     XFS_QI_DQCHUNKLEN(mp), XBF_TRYLOCK);
 232         xfs_dqunlock(dqp);
 233         if (!bp)
 234                 return;
 235         if (XFS_BUF_ISDELAYWRITE(bp))
 236                 xfs_buf_delwri_promote(bp);
 237         xfs_buf_relse(bp);
 238         return;
 239
 240 }
 241
 242 /*
 243  * This is called to attempt to lock the dquot associated with this
 244  * dquot log item.  Don't sleep on the dquot lock or the flush lock.
 245  * If the flush lock is already held, indicating that the dquot has
 246  * been or is in the process of being flushed, then see if we can
 247  * find the dquot's buffer in the buffer cache without sleeping.  If
 248  * we can and it is marked delayed write, then we want to send it out.
 249  * We delay doing so until the push routine, though, to avoid sleeping
 250  * in any device strategy routines.
 251  */
 252 STATIC uint
 253 xfs_qm_dquot_logitem_trylock(
 254         xfs_dq_logitem_t        *qip)
 255 {
 256         xfs_dquot_t             *dqp;
 257
 258         dqp = qip->qli_dquot;
 259         if (atomic_read(&dqp->q_pincount) > 0)
 260                 return XFS_ITEM_PINNED;
 261
 262         if (! xfs_qm_dqlock_nowait(dqp))
 263                 return XFS_ITEM_LOCKED;
 264
 265         if (!xfs_dqflock_nowait(dqp)) {
 266                 /*
 267                  * dquot has already been flushed to the backing buffer,
 268                  * leave it locked, pushbuf routine will unlock it.
 269                  */
 270                 return XFS_ITEM_PUSHBUF;
 271         }
 272
 273         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
 274         return XFS_ITEM_SUCCESS;
 275 }
 276
 277
 278 /*
 279  * Unlock the dquot associated with the log item.
 280  * Clear the fields of the dquot and dquot log item that
 281  * are specific to the current transaction.  If the
 282  * hold flags is set, do not unlock the dquot.
 283  */
 284 STATIC void
 285 xfs_qm_dquot_logitem_unlock(
 286         xfs_dq_logitem_t    *ql)
 287 {
 288         xfs_dquot_t     *dqp;
 289
 290         ASSERT(ql != NULL);
 291         dqp = ql->qli_dquot;
 292         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 293
 294         /*
 295          * Clear the transaction pointer in the dquot
 296          */
 297         dqp->q_transp = NULL;
 298
 299         /*
 300          * dquots are never 'held' from getting unlocked at the end of
 301          * a transaction.  Their locking and unlocking is hidden inside the
 302          * transaction layer, within trans_commit. Hence, no LI_HOLD flag
 303          * for the logitem.
 304          */
 305         xfs_dqunlock(dqp);
 306 }
 307
 308
 309 /*
 310  * this needs to stamp an lsn into the dquot, I think.
 311  * rpc's that look at user dquot's would then have to
 312  * push on the dependency recorded in the dquot
 313  */
 314 /* ARGSUSED */
 315 STATIC void
 316 xfs_qm_dquot_logitem_committing(
 317         xfs_dq_logitem_t        *l,
 318         xfs_lsn_t               lsn)
 319 {
 320         return;
 321 }
 322
 323
 324 /*
 325  * This is the ops vector for dquots
 326  */
 327 static struct xfs_item_ops xfs_dquot_item_ops = {
 328         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
 329         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 330                                         xfs_qm_dquot_logitem_format,
 331         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
 332         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 333                                         xfs_qm_dquot_logitem_unpin,
 334         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 335                                         xfs_qm_dquot_logitem_unpin_remove,
 336         .iop_trylock    = (uint(*)(xfs_log_item_t*))
 337                                         xfs_qm_dquot_logitem_trylock,
 338         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
 339         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 340                                         xfs_qm_dquot_logitem_committed,
 341         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
 342         .iop_pushbuf    = (void(*)(xfs_log_item_t*))
 343                                         xfs_qm_dquot_logitem_pushbuf,
 344         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 345                                         xfs_qm_dquot_logitem_committing
 346 };
 347
 348 /*
 349  * Initialize the dquot log item for a newly allocated dquot.
 350  * The dquot isn't locked at this point, but it isn't on any of the lists
 351  * either, so we don't care.
 352  */
 353 void
 354 xfs_qm_dquot_logitem_init(
 355         struct xfs_dquot *dqp)
 356 {
 357         xfs_dq_logitem_t  *lp;
 358         lp = &dqp->q_logitem;
 359
 360         lp->qli_item.li_type = XFS_LI_DQUOT;
 361         lp->qli_item.li_ops = &xfs_dquot_item_ops;
 362         lp->qli_item.li_mountp = dqp->q_mount;
 363         lp->qli_dquot = dqp;
 364         lp->qli_format.qlf_type = XFS_LI_DQUOT;
 365         lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
 366         lp->qli_format.qlf_blkno = dqp->q_blkno;
 367         lp->qli_format.qlf_len = 1;
 368         /*
 369          * This is just the offset of this dquot within its buffer
 370          * (which is currently 1 FSB and probably won't change).
 371          * Hence 32 bits for this offset should be just fine.
 372          * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
 373          * here, and recompute it at recovery time.
 374          */
 375         lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
 376 }
 377
 378 /*------------------  QUOTAOFF LOG ITEMS  -------------------*/
 379
 380 /*
 381  * This returns the number of iovecs needed to log the given quotaoff item.
 382  * We only need 1 iovec for an quotaoff item.  It just logs the
 383  * quotaoff_log_format structure.
 384  */
 385 /*ARGSUSED*/
 386 STATIC uint
 387 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
 388 {
 389         return (1);
 390 }
 391
 392 /*
 393  * This is called to fill in the vector of log iovecs for the
 394  * given quotaoff log item. We use only 1 iovec, and we point that
 395  * at the quotaoff_log_format structure embedded in the quotaoff item.
 396  * It is at this point that we assert that all of the extent
 397  * slots in the quotaoff item have been filled.
 398  */
 399 STATIC void
 400 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t   *qf,
 401                            xfs_log_iovec_t      *log_vector)
 402 {
 403         ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
 404
 405         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
 406         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
 407         log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
 408         qf->qql_format.qf_size = 1;
 409 }
 410
 411
 412 /*
 413  * Pinning has no meaning for an quotaoff item, so just return.
 414  */
 415 /*ARGSUSED*/
 416 STATIC void
 417 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
 418 {
 419         return;
 420 }
 421
 422
 423 /*
 424  * Since pinning has no meaning for an quotaoff item, unpinning does
 425  * not either.
 426  */
 427 /*ARGSUSED*/
 428 STATIC void
 429 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale)
 430 {
 431         return;
 432 }
 433
 434 /*ARGSUSED*/
 435 STATIC void
 436 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
 437 {
 438         return;
 439 }
 440
 441 /*
 442  * Quotaoff items have no locking, so just return success.
 443  */
 444 /*ARGSUSED*/
 445 STATIC uint
 446 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
 447 {
 448         return XFS_ITEM_LOCKED;
 449 }
 450
 451 /*
 452  * Quotaoff items have no locking or pushing, so return failure
 453  * so that the caller doesn't bother with us.
 454  */
 455 /*ARGSUSED*/
 456 STATIC void
 457 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
 458 {
 459         return;
 460 }
 461
 462 /*
 463  * The quotaoff-start-item is logged only once and cannot be moved in the log,
 464  * so simply return the lsn at which it's been logged.
 465  */
 466 /*ARGSUSED*/
 467 STATIC xfs_lsn_t
 468 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
 469 {
 470         return (lsn);
 471 }
 472
 473 /*
 474  * There isn't much you can do to push on an quotaoff item.  It is simply
 475  * stuck waiting for the log to be flushed to disk.
 476  */
 477 /*ARGSUSED*/
 478 STATIC void
 479 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
 480 {
 481         return;
 482 }
 483
 484
 485 /*ARGSUSED*/
 486 STATIC xfs_lsn_t
 487 xfs_qm_qoffend_logitem_committed(
 488         xfs_qoff_logitem_t *qfe,
 489         xfs_lsn_t lsn)
 490 {
 491         xfs_qoff_logitem_t      *qfs;
 492         struct xfs_ail          *ailp;
 493
 494         qfs = qfe->qql_start_lip;
 495         ailp = qfs->qql_item.li_ailp;
 496         spin_lock(&ailp->xa_lock);
 497         /*
 498          * Delete the qoff-start logitem from the AIL.
 499          * xfs_trans_ail_delete() drops the AIL lock.
 500          */
 501         xfs_trans_ail_delete(ailp, (xfs_log_item_t *)qfs);
 502         kmem_free(qfs);
 503         kmem_free(qfe);
 504         return (xfs_lsn_t)-1;
 505 }
 506
 507 /*
 508  * XXX rcc - don't know quite what to do with this.  I think we can
 509  * just ignore it.  The only time that isn't the case is if we allow
 510  * the client to somehow see that quotas have been turned off in which
 511  * we can't allow that to get back until the quotaoff hits the disk.
 512  * So how would that happen?  Also, do we need different routines for
 513  * quotaoff start and quotaoff end?  I suspect the answer is yes but
 514  * to be sure, I need to look at the recovery code and see how quota off
 515  * recovery is handled (do we roll forward or back or do something else).
 516  * If we roll forwards or backwards, then we need two separate routines,
 517  * one that does nothing and one that stamps in the lsn that matters
 518  * (truly makes the quotaoff irrevocable).  If we do something else,
 519  * then maybe we don't need two.
 520  */
 521 /* ARGSUSED */
 522 STATIC void
 523 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 524 {
 525         return;
 526 }
 527
 528 /* ARGSUSED */
 529 STATIC void
 530 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 531 {
 532         return;
 533 }
 534
 535 static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 536         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 537         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 538                                         xfs_qm_qoff_logitem_format,
 539         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 540         .iop_unpin      = (void(*)(xfs_log_item_t* ,int))
 541                                         xfs_qm_qoff_logitem_unpin,
 542         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 543                                         xfs_qm_qoff_logitem_unpin_remove,
 544         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 545         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 546         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 547                                         xfs_qm_qoffend_logitem_committed,
 548         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 549         .iop_pushbuf    = NULL,
 550         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 551                                         xfs_qm_qoffend_logitem_committing
 552 };
 553
 554 /*
 555  * This is the ops vector shared by all quotaoff-start log items.
 556  */
 557 static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 558         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 559         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 560                                         xfs_qm_qoff_logitem_format,
 561         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 562         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 563                                         xfs_qm_qoff_logitem_unpin,
 564         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 565                                         xfs_qm_qoff_logitem_unpin_remove,
 566         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 567         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 568         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 569                                         xfs_qm_qoff_logitem_committed,
 570         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 571         .iop_pushbuf    = NULL,
 572         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 573                                         xfs_qm_qoff_logitem_committing
 574 };
 575
 576 /*
 577  * Allocate and initialize an quotaoff item of the correct quota type(s).
 578  */
 579 xfs_qoff_logitem_t *
 580 xfs_qm_qoff_logitem_init(
 581         struct xfs_mount *mp,
 582         xfs_qoff_logitem_t *start,
 583         uint flags)
 584 {
 585         xfs_qoff_logitem_t      *qf;
 586
 587         qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
 588
 589         qf->qql_item.li_type = XFS_LI_QUOTAOFF;
 590         if (start)
 591                 qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops;
 592         else
 593                 qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops;
 594         qf->qql_item.li_mountp = mp;
 595         qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
 596         qf->qql_format.qf_flags = flags;
 597         qf->qql_start_lip = start;
 598         return (qf);
 599 }