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         int             error;
 150
 151         dqp = logitem->qli_dquot;
 152
 153         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 154         ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp));
 155
 156         /*
 157          * Since we were able to lock the dquot's flush lock and
 158          * we found it on the AIL, the dquot must be dirty.  This
 159          * is because the dquot is removed from the AIL while still
 160          * holding the flush lock in xfs_dqflush_done().  Thus, if
 161          * we found it in the AIL and were able to obtain the flush
 162          * lock without sleeping, then there must not have been
 163          * anyone in the process of flushing the dquot.
 164          */
 165         error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI);
 166         if (error)
 167                 xfs_fs_cmn_err(CE_WARN, dqp->q_mount,
 168                         "xfs_qm_dquot_logitem_push: push error %d on dqp %p",
 169                         error, dqp);
 170         xfs_dqunlock(dqp);
 171 }
 172
 173 /*ARGSUSED*/
 174 STATIC xfs_lsn_t
 175 xfs_qm_dquot_logitem_committed(
 176         xfs_dq_logitem_t        *l,
 177         xfs_lsn_t               lsn)
 178 {
 179         /*
 180          * We always re-log the entire dquot when it becomes dirty,
 181          * so, the latest copy _is_ the only one that matters.
 182          */
 183         return (lsn);
 184 }
 185
 186
 187 /*
 188  * This is called to wait for the given dquot to be unpinned.
 189  * Most of these pin/unpin routines are plagiarized from inode code.
 190  */
 191 void
 192 xfs_qm_dqunpin_wait(
 193         xfs_dquot_t     *dqp)
 194 {
 195         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 196         if (dqp->q_pincount == 0) {
 197                 return;
 198         }
 199
 200         /*
 201          * Give the log a push so we don't wait here too long.
 202          */
 203         xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
 204         spin_lock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 205         if (dqp->q_pincount == 0) {
 206                 spin_unlock(&(XFS_DQ_TO_QINF(dqp)->qi_pinlock));
 207                 return;
 208         }
 209         sv_wait(&(dqp->q_pinwait), PINOD,
 210                 &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s);
 211 }
 212
 213 /*
 214  * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that
 215  * the dquot is locked by us, but the flush lock isn't. So, here we are
 216  * going to see if the relevant dquot buffer is incore, waiting on DELWRI.
 217  * If so, we want to push it out to help us take this item off the AIL as soon
 218  * as possible.
 219  *
 220  * We must not be holding the AIL lock at this point. Calling incore() to
 221  * search the buffer cache can be a time consuming thing, and AIL lock is a
 222  * spinlock.
 223  */
 224 STATIC void
 225 xfs_qm_dquot_logitem_pushbuf(
 226         xfs_dq_logitem_t    *qip)
 227 {
 228         xfs_dquot_t     *dqp;
 229         xfs_mount_t     *mp;
 230         xfs_buf_t       *bp;
 231         uint            dopush;
 232
 233         dqp = qip->qli_dquot;
 234         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 235
 236         /*
 237          * The qli_pushbuf_flag keeps others from
 238          * trying to duplicate our effort.
 239          */
 240         ASSERT(qip->qli_pushbuf_flag != 0);
 241         ASSERT(qip->qli_push_owner == current_pid());
 242
 243         /*
 244          * If flushlock isn't locked anymore, chances are that the
 245          * inode flush completed and the inode was taken off the AIL.
 246          * So, just get out.
 247          */
 248         if (!issemalocked(&(dqp->q_flock))  ||
 249             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 250                 qip->qli_pushbuf_flag = 0;
 251                 xfs_dqunlock(dqp);
 252                 return;
 253         }
 254         mp = dqp->q_mount;
 255         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
 256                     XFS_QI_DQCHUNKLEN(mp),
 257                     XFS_INCORE_TRYLOCK);
 258         if (bp != NULL) {
 259                 if (XFS_BUF_ISDELAYWRITE(bp)) {
 260                         dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
 261                                   issemalocked(&(dqp->q_flock)));
 262                         qip->qli_pushbuf_flag = 0;
 263                         xfs_dqunlock(dqp);
 264
 265                         if (XFS_BUF_ISPINNED(bp)) {
 266                                 xfs_log_force(mp, (xfs_lsn_t)0,
 267                                               XFS_LOG_FORCE);
 268                         }
 269                         if (dopush) {
 270                                 int     error;
 271 #ifdef XFSRACEDEBUG
 272                                 delay_for_intr();
 273                                 delay(300);
 274 #endif
 275                                 error = xfs_bawrite(mp, bp);
 276                                 if (error)
 277                                         xfs_fs_cmn_err(CE_WARN, mp,
 278         "xfs_qm_dquot_logitem_pushbuf: pushbuf error %d on qip %p, bp %p",
 279                                                         error, qip, bp);
 280                         } else {
 281                                 xfs_buf_relse(bp);
 282                         }
 283                 } else {
 284                         qip->qli_pushbuf_flag = 0;
 285                         xfs_dqunlock(dqp);
 286                         xfs_buf_relse(bp);
 287                 }
 288                 return;
 289         }
 290
 291         qip->qli_pushbuf_flag = 0;
 292         xfs_dqunlock(dqp);
 293 }
 294
 295 /*
 296  * This is called to attempt to lock the dquot associated with this
 297  * dquot log item.  Don't sleep on the dquot lock or the flush lock.
 298  * If the flush lock is already held, indicating that the dquot has
 299  * been or is in the process of being flushed, then see if we can
 300  * find the dquot's buffer in the buffer cache without sleeping.  If
 301  * we can and it is marked delayed write, then we want to send it out.
 302  * We delay doing so until the push routine, though, to avoid sleeping
 303  * in any device strategy routines.
 304  */
 305 STATIC uint
 306 xfs_qm_dquot_logitem_trylock(
 307         xfs_dq_logitem_t        *qip)
 308 {
 309         xfs_dquot_t             *dqp;
 310         uint                    retval;
 311
 312         dqp = qip->qli_dquot;
 313         if (dqp->q_pincount > 0)
 314                 return (XFS_ITEM_PINNED);
 315
 316         if (! xfs_qm_dqlock_nowait(dqp))
 317                 return (XFS_ITEM_LOCKED);
 318
 319         retval = XFS_ITEM_SUCCESS;
 320         if (! xfs_qm_dqflock_nowait(dqp)) {
 321                 /*
 322                  * The dquot is already being flushed.  It may have been
 323                  * flushed delayed write, however, and we don't want to
 324                  * get stuck waiting for that to complete.  So, we want to check
 325                  * to see if we can lock the dquot's buffer without sleeping.
 326                  * If we can and it is marked for delayed write, then we
 327                  * hold it and send it out from the push routine.  We don't
 328                  * want to do that now since we might sleep in the device
 329                  * strategy routine.  We also don't want to grab the buffer lock
 330                  * here because we'd like not to call into the buffer cache
 331                  * while holding the AIL lock.
 332                  * Make sure to only return PUSHBUF if we set pushbuf_flag
 333                  * ourselves.  If someone else is doing it then we don't
 334                  * want to go to the push routine and duplicate their efforts.
 335                  */
 336                 if (qip->qli_pushbuf_flag == 0) {
 337                         qip->qli_pushbuf_flag = 1;
 338                         ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno);
 339 #ifdef DEBUG
 340                         qip->qli_push_owner = current_pid();
 341 #endif
 342                         /*
 343                          * The dquot is left locked.
 344                          */
 345                         retval = XFS_ITEM_PUSHBUF;
 346                 } else {
 347                         retval = XFS_ITEM_FLUSHING;
 348                         xfs_dqunlock_nonotify(dqp);
 349                 }
 350         }
 351
 352         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
 353         return (retval);
 354 }
 355
 356
 357 /*
 358  * Unlock the dquot associated with the log item.
 359  * Clear the fields of the dquot and dquot log item that
 360  * are specific to the current transaction.  If the
 361  * hold flags is set, do not unlock the dquot.
 362  */
 363 STATIC void
 364 xfs_qm_dquot_logitem_unlock(
 365         xfs_dq_logitem_t    *ql)
 366 {
 367         xfs_dquot_t     *dqp;
 368
 369         ASSERT(ql != NULL);
 370         dqp = ql->qli_dquot;
 371         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 372
 373         /*
 374          * Clear the transaction pointer in the dquot
 375          */
 376         dqp->q_transp = NULL;
 377
 378         /*
 379          * dquots are never 'held' from getting unlocked at the end of
 380          * a transaction.  Their locking and unlocking is hidden inside the
 381          * transaction layer, within trans_commit. Hence, no LI_HOLD flag
 382          * for the logitem.
 383          */
 384         xfs_dqunlock(dqp);
 385 }
 386
 387
 388 /*
 389  * this needs to stamp an lsn into the dquot, I think.
 390  * rpc's that look at user dquot's would then have to
 391  * push on the dependency recorded in the dquot
 392  */
 393 /* ARGSUSED */
 394 STATIC void
 395 xfs_qm_dquot_logitem_committing(
 396         xfs_dq_logitem_t        *l,
 397         xfs_lsn_t               lsn)
 398 {
 399         return;
 400 }
 401
 402
 403 /*
 404  * This is the ops vector for dquots
 405  */
 406 static struct xfs_item_ops xfs_dquot_item_ops = {
 407         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
 408         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 409                                         xfs_qm_dquot_logitem_format,
 410         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
 411         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 412                                         xfs_qm_dquot_logitem_unpin,
 413         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 414                                         xfs_qm_dquot_logitem_unpin_remove,
 415         .iop_trylock    = (uint(*)(xfs_log_item_t*))
 416                                         xfs_qm_dquot_logitem_trylock,
 417         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
 418         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 419                                         xfs_qm_dquot_logitem_committed,
 420         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
 421         .iop_pushbuf    = (void(*)(xfs_log_item_t*))
 422                                         xfs_qm_dquot_logitem_pushbuf,
 423         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 424                                         xfs_qm_dquot_logitem_committing
 425 };
 426
 427 /*
 428  * Initialize the dquot log item for a newly allocated dquot.
 429  * The dquot isn't locked at this point, but it isn't on any of the lists
 430  * either, so we don't care.
 431  */
 432 void
 433 xfs_qm_dquot_logitem_init(
 434         struct xfs_dquot *dqp)
 435 {
 436         xfs_dq_logitem_t  *lp;
 437         lp = &dqp->q_logitem;
 438
 439         lp->qli_item.li_type = XFS_LI_DQUOT;
 440         lp->qli_item.li_ops = &xfs_dquot_item_ops;
 441         lp->qli_item.li_mountp = dqp->q_mount;
 442         lp->qli_dquot = dqp;
 443         lp->qli_format.qlf_type = XFS_LI_DQUOT;
 444         lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id);
 445         lp->qli_format.qlf_blkno = dqp->q_blkno;
 446         lp->qli_format.qlf_len = 1;
 447         /*
 448          * This is just the offset of this dquot within its buffer
 449          * (which is currently 1 FSB and probably won't change).
 450          * Hence 32 bits for this offset should be just fine.
 451          * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
 452          * here, and recompute it at recovery time.
 453          */
 454         lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
 455 }
 456
 457 /*------------------  QUOTAOFF LOG ITEMS  -------------------*/
 458
 459 /*
 460  * This returns the number of iovecs needed to log the given quotaoff item.
 461  * We only need 1 iovec for an quotaoff item.  It just logs the
 462  * quotaoff_log_format structure.
 463  */
 464 /*ARGSUSED*/
 465 STATIC uint
 466 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
 467 {
 468         return (1);
 469 }
 470
 471 /*
 472  * This is called to fill in the vector of log iovecs for the
 473  * given quotaoff log item. We use only 1 iovec, and we point that
 474  * at the quotaoff_log_format structure embedded in the quotaoff item.
 475  * It is at this point that we assert that all of the extent
 476  * slots in the quotaoff item have been filled.
 477  */
 478 STATIC void
 479 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t   *qf,
 480                            xfs_log_iovec_t      *log_vector)
 481 {
 482         ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
 483
 484         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
 485         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
 486         XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF);
 487         qf->qql_format.qf_size = 1;
 488 }
 489
 490
 491 /*
 492  * Pinning has no meaning for an quotaoff item, so just return.
 493  */
 494 /*ARGSUSED*/
 495 STATIC void
 496 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
 497 {
 498         return;
 499 }
 500
 501
 502 /*
 503  * Since pinning has no meaning for an quotaoff item, unpinning does
 504  * not either.
 505  */
 506 /*ARGSUSED*/
 507 STATIC void
 508 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale)
 509 {
 510         return;
 511 }
 512
 513 /*ARGSUSED*/
 514 STATIC void
 515 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
 516 {
 517         return;
 518 }
 519
 520 /*
 521  * Quotaoff items have no locking, so just return success.
 522  */
 523 /*ARGSUSED*/
 524 STATIC uint
 525 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
 526 {
 527         return XFS_ITEM_LOCKED;
 528 }
 529
 530 /*
 531  * Quotaoff items have no locking or pushing, so return failure
 532  * so that the caller doesn't bother with us.
 533  */
 534 /*ARGSUSED*/
 535 STATIC void
 536 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
 537 {
 538         return;
 539 }
 540
 541 /*
 542  * The quotaoff-start-item is logged only once and cannot be moved in the log,
 543  * so simply return the lsn at which it's been logged.
 544  */
 545 /*ARGSUSED*/
 546 STATIC xfs_lsn_t
 547 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
 548 {
 549         return (lsn);
 550 }
 551
 552 /*
 553  * There isn't much you can do to push on an quotaoff item.  It is simply
 554  * stuck waiting for the log to be flushed to disk.
 555  */
 556 /*ARGSUSED*/
 557 STATIC void
 558 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
 559 {
 560         return;
 561 }
 562
 563
 564 /*ARGSUSED*/
 565 STATIC xfs_lsn_t
 566 xfs_qm_qoffend_logitem_committed(
 567         xfs_qoff_logitem_t *qfe,
 568         xfs_lsn_t lsn)
 569 {
 570         xfs_qoff_logitem_t      *qfs;
 571
 572         qfs = qfe->qql_start_lip;
 573         spin_lock(&qfs->qql_item.li_mountp->m_ail_lock);
 574         /*
 575          * Delete the qoff-start logitem from the AIL.
 576          * xfs_trans_delete_ail() drops the AIL lock.
 577          */
 578         xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs);
 579         kmem_free(qfs);
 580         kmem_free(qfe);
 581         return (xfs_lsn_t)-1;
 582 }
 583
 584 /*
 585  * XXX rcc - don't know quite what to do with this.  I think we can
 586  * just ignore it.  The only time that isn't the case is if we allow
 587  * the client to somehow see that quotas have been turned off in which
 588  * we can't allow that to get back until the quotaoff hits the disk.
 589  * So how would that happen?  Also, do we need different routines for
 590  * quotaoff start and quotaoff end?  I suspect the answer is yes but
 591  * to be sure, I need to look at the recovery code and see how quota off
 592  * recovery is handled (do we roll forward or back or do something else).
 593  * If we roll forwards or backwards, then we need two separate routines,
 594  * one that does nothing and one that stamps in the lsn that matters
 595  * (truly makes the quotaoff irrevocable).  If we do something else,
 596  * then maybe we don't need two.
 597  */
 598 /* ARGSUSED */
 599 STATIC void
 600 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 601 {
 602         return;
 603 }
 604
 605 /* ARGSUSED */
 606 STATIC void
 607 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 608 {
 609         return;
 610 }
 611
 612 static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 613         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 614         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 615                                         xfs_qm_qoff_logitem_format,
 616         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 617         .iop_unpin      = (void(*)(xfs_log_item_t* ,int))
 618                                         xfs_qm_qoff_logitem_unpin,
 619         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 620                                         xfs_qm_qoff_logitem_unpin_remove,
 621         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 622         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 623         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 624                                         xfs_qm_qoffend_logitem_committed,
 625         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 626         .iop_pushbuf    = NULL,
 627         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 628                                         xfs_qm_qoffend_logitem_committing
 629 };
 630
 631 /*
 632  * This is the ops vector shared by all quotaoff-start log items.
 633  */
 634 static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 635         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 636         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 637                                         xfs_qm_qoff_logitem_format,
 638         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 639         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 640                                         xfs_qm_qoff_logitem_unpin,
 641         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 642                                         xfs_qm_qoff_logitem_unpin_remove,
 643         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 644         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 645         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 646                                         xfs_qm_qoff_logitem_committed,
 647         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 648         .iop_pushbuf    = NULL,
 649         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 650                                         xfs_qm_qoff_logitem_committing
 651 };
 652
 653 /*
 654  * Allocate and initialize an quotaoff item of the correct quota type(s).
 655  */
 656 xfs_qoff_logitem_t *
 657 xfs_qm_qoff_logitem_init(
 658         struct xfs_mount *mp,
 659         xfs_qoff_logitem_t *start,
 660         uint flags)
 661 {
 662         xfs_qoff_logitem_t      *qf;
 663
 664         qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
 665
 666         qf->qql_item.li_type = XFS_LI_QUOTAOFF;
 667         if (start)
 668                 qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops;
 669         else
 670                 qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops;
 671         qf->qql_item.li_mountp = mp;
 672         qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
 673         qf->qql_format.qf_flags = flags;
 674         qf->qql_start_lip = start;
 675         return (qf);
 676 }