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