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