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 {
 112         xfs_dquot_t *dqp = logitem->qli_dquot;
 113
 114         ASSERT(atomic_read(&dqp->q_pincount) > 0);
 115         if (atomic_dec_and_test(&dqp->q_pincount))
 116                 wake_up(&dqp->q_pinwait);
 117 }
 118
 119 /* ARGSUSED */
 120 STATIC void
 121 xfs_qm_dquot_logitem_unpin_remove(
 122         xfs_dq_logitem_t *logitem,
 123         xfs_trans_t      *tp)
 124 {
 125         xfs_qm_dquot_logitem_unpin(logitem);
 126 }
 127
 128 /*
 129  * Given the logitem, this writes the corresponding dquot entry to disk
 130  * asynchronously. This is called with the dquot entry securely locked;
 131  * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot
 132  * at the end.
 133  */
 134 STATIC void
 135 xfs_qm_dquot_logitem_push(
 136         xfs_dq_logitem_t        *logitem)
 137 {
 138         xfs_dquot_t     *dqp;
 139         int             error;
 140
 141         dqp = logitem->qli_dquot;
 142
 143         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 144         ASSERT(!completion_done(&dqp->q_flush));
 145
 146         /*
 147          * Since we were able to lock the dquot's flush lock and
 148          * we found it on the AIL, the dquot must be dirty.  This
 149          * is because the dquot is removed from the AIL while still
 150          * holding the flush lock in xfs_dqflush_done().  Thus, if
 151          * we found it in the AIL and were able to obtain the flush
 152          * lock without sleeping, then there must not have been
 153          * anyone in the process of flushing the dquot.
 154          */
 155         error = xfs_qm_dqflush(dqp, 0);
 156         if (error)
 157                 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
 158                         "xfs_qm_dquot_logitem_push: push error %d on dqp %p",
 159                         error, dqp);
 160         xfs_dqunlock(dqp);
 161 }
 162
 163 /*ARGSUSED*/
 164 STATIC xfs_lsn_t
 165 xfs_qm_dquot_logitem_committed(
 166         xfs_dq_logitem_t        *l,
 167         xfs_lsn_t               lsn)
 168 {
 169         /*
 170          * We always re-log the entire dquot when it becomes dirty,
 171          * so, the latest copy _is_ the only one that matters.
 172          */
 173         return (lsn);
 174 }
 175
 176
 177 /*
 178  * This is called to wait for the given dquot to be unpinned.
 179  * Most of these pin/unpin routines are plagiarized from inode code.
 180  */
 181 void
 182 xfs_qm_dqunpin_wait(
 183         xfs_dquot_t     *dqp)
 184 {
 185         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 186         if (atomic_read(&dqp->q_pincount) == 0)
 187                 return;
 188
 189         /*
 190          * Give the log a push so we don't wait here too long.
 191          */
 192         xfs_log_force(dqp->q_mount, 0);
 193         wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0));
 194 }
 195
 196 /*
 197  * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that
 198  * the dquot is locked by us, but the flush lock isn't. So, here we are
 199  * going to see if the relevant dquot buffer is incore, waiting on DELWRI.
 200  * If so, we want to push it out to help us take this item off the AIL as soon
 201  * as possible.
 202  *
 203  * We must not be holding the AIL lock at this point. Calling incore() to
 204  * search the buffer cache can be a time consuming thing, and AIL lock is a
 205  * spinlock.
 206  */
 207 STATIC void
 208 xfs_qm_dquot_logitem_pushbuf(
 209         xfs_dq_logitem_t    *qip)
 210 {
 211         xfs_dquot_t     *dqp;
 212         xfs_mount_t     *mp;
 213         xfs_buf_t       *bp;
 214
 215         dqp = qip->qli_dquot;
 216         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 217
 218         /*
 219          * If flushlock isn't locked anymore, chances are that the
 220          * inode flush completed and the inode was taken off the AIL.
 221          * So, just get out.
 222          */
 223         if (completion_done(&dqp->q_flush)  ||
 224             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 225                 xfs_dqunlock(dqp);
 226                 return;
 227         }
 228         mp = dqp->q_mount;
 229         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
 230                         mp->m_quotainfo->qi_dqchunklen, XBF_TRYLOCK);
 231         xfs_dqunlock(dqp);
 232         if (!bp)
 233                 return;
 234         if (XFS_BUF_ISDELAYWRITE(bp))
 235                 xfs_buf_delwri_promote(bp);
 236         xfs_buf_relse(bp);
 237         return;
 238
 239 }
 240
 241 /*
 242  * This is called to attempt to lock the dquot associated with this
 243  * dquot log item.  Don't sleep on the dquot lock or the flush lock.
 244  * If the flush lock is already held, indicating that the dquot has
 245  * been or is in the process of being flushed, then see if we can
 246  * find the dquot's buffer in the buffer cache without sleeping.  If
 247  * we can and it is marked delayed write, then we want to send it out.
 248  * We delay doing so until the push routine, though, to avoid sleeping
 249  * in any device strategy routines.
 250  */
 251 STATIC uint
 252 xfs_qm_dquot_logitem_trylock(
 253         xfs_dq_logitem_t        *qip)
 254 {
 255         xfs_dquot_t             *dqp;
 256
 257         dqp = qip->qli_dquot;
 258         if (atomic_read(&dqp->q_pincount) > 0)
 259                 return XFS_ITEM_PINNED;
 260
 261         if (! xfs_qm_dqlock_nowait(dqp))
 262                 return XFS_ITEM_LOCKED;
 263
 264         if (!xfs_dqflock_nowait(dqp)) {
 265                 /*
 266                  * dquot has already been flushed to the backing buffer,
 267                  * leave it locked, pushbuf routine will unlock it.
 268                  */
 269                 return XFS_ITEM_PUSHBUF;
 270         }
 271
 272         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
 273         return XFS_ITEM_SUCCESS;
 274 }
 275
 276
 277 /*
 278  * Unlock the dquot associated with the log item.
 279  * Clear the fields of the dquot and dquot log item that
 280  * are specific to the current transaction.  If the
 281  * hold flags is set, do not unlock the dquot.
 282  */
 283 STATIC void
 284 xfs_qm_dquot_logitem_unlock(
 285         xfs_dq_logitem_t    *ql)
 286 {
 287         xfs_dquot_t     *dqp;
 288
 289         ASSERT(ql != NULL);
 290         dqp = ql->qli_dquot;
 291         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 292
 293         /*
 294          * Clear the transaction pointer in the dquot
 295          */
 296         dqp->q_transp = NULL;
 297
 298         /*
 299          * dquots are never 'held' from getting unlocked at the end of
 300          * a transaction.  Their locking and unlocking is hidden inside the
 301          * transaction layer, within trans_commit. Hence, no LI_HOLD flag
 302          * for the logitem.
 303          */
 304         xfs_dqunlock(dqp);
 305 }
 306
 307
 308 /*
 309  * this needs to stamp an lsn into the dquot, I think.
 310  * rpc's that look at user dquot's would then have to
 311  * push on the dependency recorded in the dquot
 312  */
 313 /* ARGSUSED */
 314 STATIC void
 315 xfs_qm_dquot_logitem_committing(
 316         xfs_dq_logitem_t        *l,
 317         xfs_lsn_t               lsn)
 318 {
 319         return;
 320 }
 321
 322
 323 /*
 324  * This is the ops vector for dquots
 325  */
 326 static struct xfs_item_ops xfs_dquot_item_ops = {
 327         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
 328         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 329                                         xfs_qm_dquot_logitem_format,
 330         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
 331         .iop_unpin      = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unpin,
 332         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 333                                         xfs_qm_dquot_logitem_unpin_remove,
 334         .iop_trylock    = (uint(*)(xfs_log_item_t*))
 335                                         xfs_qm_dquot_logitem_trylock,
 336         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
 337         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 338                                         xfs_qm_dquot_logitem_committed,
 339         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
 340         .iop_pushbuf    = (void(*)(xfs_log_item_t*))
 341                                         xfs_qm_dquot_logitem_pushbuf,
 342         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 343                                         xfs_qm_dquot_logitem_committing
 344 };
 345
 346 /*
 347  * Initialize the dquot log item for a newly allocated dquot.
 348  * The dquot isn't locked at this point, but it isn't on any of the lists
 349  * either, so we don't care.
 350  */
 351 void
 352 xfs_qm_dquot_logitem_init(
 353         struct xfs_dquot *dqp)
 354 {
 355         xfs_dq_logitem_t  *lp;
 356         lp = &dqp->q_logitem;
 357
 358         xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT,
 359                                         &xfs_dquot_item_ops);
 360         lp->qli_dquot = dqp;
 361         lp->qli_format.qlf_type = XFS_LI_DQUOT;
 362         lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
 363         lp->qli_format.qlf_blkno = dqp->q_blkno;
 364         lp->qli_format.qlf_len = 1;
 365         /*
 366          * This is just the offset of this dquot within its buffer
 367          * (which is currently 1 FSB and probably won't change).
 368          * Hence 32 bits for this offset should be just fine.
 369          * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
 370          * here, and recompute it at recovery time.
 371          */
 372         lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
 373 }
 374
 375 /*------------------  QUOTAOFF LOG ITEMS  -------------------*/
 376
 377 /*
 378  * This returns the number of iovecs needed to log the given quotaoff item.
 379  * We only need 1 iovec for an quotaoff item.  It just logs the
 380  * quotaoff_log_format structure.
 381  */
 382 /*ARGSUSED*/
 383 STATIC uint
 384 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
 385 {
 386         return (1);
 387 }
 388
 389 /*
 390  * This is called to fill in the vector of log iovecs for the
 391  * given quotaoff log item. We use only 1 iovec, and we point that
 392  * at the quotaoff_log_format structure embedded in the quotaoff item.
 393  * It is at this point that we assert that all of the extent
 394  * slots in the quotaoff item have been filled.
 395  */
 396 STATIC void
 397 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t   *qf,
 398                            xfs_log_iovec_t      *log_vector)
 399 {
 400         ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
 401
 402         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
 403         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
 404         log_vector->i_type = XLOG_REG_TYPE_QUOTAOFF;
 405         qf->qql_format.qf_size = 1;
 406 }
 407
 408
 409 /*
 410  * Pinning has no meaning for an quotaoff item, so just return.
 411  */
 412 /*ARGSUSED*/
 413 STATIC void
 414 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
 415 {
 416         return;
 417 }
 418
 419
 420 /*
 421  * Since pinning has no meaning for an quotaoff item, unpinning does
 422  * not either.
 423  */
 424 /*ARGSUSED*/
 425 STATIC void
 426 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf)
 427 {
 428         return;
 429 }
 430
 431 /*ARGSUSED*/
 432 STATIC void
 433 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
 434 {
 435         return;
 436 }
 437
 438 /*
 439  * Quotaoff items have no locking, so just return success.
 440  */
 441 /*ARGSUSED*/
 442 STATIC uint
 443 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
 444 {
 445         return XFS_ITEM_LOCKED;
 446 }
 447
 448 /*
 449  * Quotaoff items have no locking or pushing, so return failure
 450  * so that the caller doesn't bother with us.
 451  */
 452 /*ARGSUSED*/
 453 STATIC void
 454 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
 455 {
 456         return;
 457 }
 458
 459 /*
 460  * The quotaoff-start-item is logged only once and cannot be moved in the log,
 461  * so simply return the lsn at which it's been logged.
 462  */
 463 /*ARGSUSED*/
 464 STATIC xfs_lsn_t
 465 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
 466 {
 467         return (lsn);
 468 }
 469
 470 /*
 471  * There isn't much you can do to push on an quotaoff item.  It is simply
 472  * stuck waiting for the log to be flushed to disk.
 473  */
 474 /*ARGSUSED*/
 475 STATIC void
 476 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
 477 {
 478         return;
 479 }
 480
 481
 482 /*ARGSUSED*/
 483 STATIC xfs_lsn_t
 484 xfs_qm_qoffend_logitem_committed(
 485         xfs_qoff_logitem_t *qfe,
 486         xfs_lsn_t lsn)
 487 {
 488         xfs_qoff_logitem_t      *qfs;
 489         struct xfs_ail          *ailp;
 490
 491         qfs = qfe->qql_start_lip;
 492         ailp = qfs->qql_item.li_ailp;
 493         spin_lock(&ailp->xa_lock);
 494         /*
 495          * Delete the qoff-start logitem from the AIL.
 496          * xfs_trans_ail_delete() drops the AIL lock.
 497          */
 498         xfs_trans_ail_delete(ailp, (xfs_log_item_t *)qfs);
 499         kmem_free(qfs);
 500         kmem_free(qfe);
 501         return (xfs_lsn_t)-1;
 502 }
 503
 504 /*
 505  * XXX rcc - don't know quite what to do with this.  I think we can
 506  * just ignore it.  The only time that isn't the case is if we allow
 507  * the client to somehow see that quotas have been turned off in which
 508  * we can't allow that to get back until the quotaoff hits the disk.
 509  * So how would that happen?  Also, do we need different routines for
 510  * quotaoff start and quotaoff end?  I suspect the answer is yes but
 511  * to be sure, I need to look at the recovery code and see how quota off
 512  * recovery is handled (do we roll forward or back or do something else).
 513  * If we roll forwards or backwards, then we need two separate routines,
 514  * one that does nothing and one that stamps in the lsn that matters
 515  * (truly makes the quotaoff irrevocable).  If we do something else,
 516  * then maybe we don't need two.
 517  */
 518 /* ARGSUSED */
 519 STATIC void
 520 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 521 {
 522         return;
 523 }
 524
 525 /* ARGSUSED */
 526 STATIC void
 527 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 528 {
 529         return;
 530 }
 531
 532 static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 533         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 534         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 535                                         xfs_qm_qoff_logitem_format,
 536         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 537         .iop_unpin      = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unpin,
 538         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 539                                         xfs_qm_qoff_logitem_unpin_remove,
 540         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 541         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 542         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 543                                         xfs_qm_qoffend_logitem_committed,
 544         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 545         .iop_pushbuf    = NULL,
 546         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 547                                         xfs_qm_qoffend_logitem_committing
 548 };
 549
 550 /*
 551  * This is the ops vector shared by all quotaoff-start log items.
 552  */
 553 static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 554         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 555         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 556                                         xfs_qm_qoff_logitem_format,
 557         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 558         .iop_unpin      = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unpin,
 559         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 560                                         xfs_qm_qoff_logitem_unpin_remove,
 561         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 562         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 563         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 564                                         xfs_qm_qoff_logitem_committed,
 565         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 566         .iop_pushbuf    = NULL,
 567         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 568                                         xfs_qm_qoff_logitem_committing
 569 };
 570
 571 /*
 572  * Allocate and initialize an quotaoff item of the correct quota type(s).
 573  */
 574 xfs_qoff_logitem_t *
 575 xfs_qm_qoff_logitem_init(
 576         struct xfs_mount *mp,
 577         xfs_qoff_logitem_t *start,
 578         uint flags)
 579 {
 580         xfs_qoff_logitem_t      *qf;
 581
 582         qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
 583
 584         xfs_log_item_init(mp, &qf->qql_item, XFS_LI_QUOTAOFF, start ?
 585                         &xfs_qm_qoffend_logitem_ops : &xfs_qm_qoff_logitem_ops);
 586         qf->qql_item.li_mountp = mp;
 587         qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
 588         qf->qql_format.qf_flags = flags;
 589         qf->qql_start_lip = start;
 590         return (qf);
 591 }