fs/xfs/quota/xfs_dquot_item.c

   1 /*
   2  * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32
  33 #include "xfs.h"
  34 #include "xfs_fs.h"
  35 #include "xfs_bit.h"
  36 #include "xfs_log.h"
  37 #include "xfs_inum.h"
  38 #include "xfs_trans.h"
  39 #include "xfs_sb.h"
  40 #include "xfs_ag.h"
  41 #include "xfs_dir.h"
  42 #include "xfs_dir2.h"
  43 #include "xfs_alloc.h"
  44 #include "xfs_dmapi.h"
  45 #include "xfs_quota.h"
  46 #include "xfs_mount.h"
  47 #include "xfs_bmap_btree.h"
  48 #include "xfs_alloc_btree.h"
  49 #include "xfs_ialloc_btree.h"
  50 #include "xfs_dir_sf.h"
  51 #include "xfs_dir2_sf.h"
  52 #include "xfs_attr_sf.h"
  53 #include "xfs_dinode.h"
  54 #include "xfs_inode.h"
  55 #include "xfs_bmap.h"
  56 #include "xfs_btree.h"
  57 #include "xfs_ialloc.h"
  58 #include "xfs_rtalloc.h"
  59 #include "xfs_error.h"
  60 #include "xfs_itable.h"
  61 #include "xfs_rw.h"
  62 #include "xfs_acl.h"
  63 #include "xfs_cap.h"
  64 #include "xfs_mac.h"
  65 #include "xfs_attr.h"
  66 #include "xfs_buf_item.h"
  67 #include "xfs_trans_priv.h"
  68 #include "xfs_qm.h"
  69
  70
  71 /*
  72  * returns the number of iovecs needed to log the given dquot item.
  73  */
  74 /* ARGSUSED */
  75 STATIC uint
  76 xfs_qm_dquot_logitem_size(
  77         xfs_dq_logitem_t        *logitem)
  78 {
  79         /*
  80          * we need only two iovecs, one for the format, one for the real thing
  81          */
  82         return (2);
  83 }
  84
  85 /*
  86  * fills in the vector of log iovecs for the given dquot log item.
  87  */
  88 STATIC void
  89 xfs_qm_dquot_logitem_format(
  90         xfs_dq_logitem_t        *logitem,
  91         xfs_log_iovec_t         *logvec)
  92 {
  93         ASSERT(logitem);
  94         ASSERT(logitem->qli_dquot);
  95
  96         logvec->i_addr = (xfs_caddr_t)&logitem->qli_format;
  97         logvec->i_len  = sizeof(xfs_dq_logformat_t);
  98         logvec++;
  99         logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core;
 100         logvec->i_len  = sizeof(xfs_disk_dquot_t);
 101
 102         ASSERT(2 == logitem->qli_item.li_desc->lid_size);
 103         logitem->qli_format.qlf_size = 2;
 104
 105 }
 106
 107 /*
 108  * Increment the pin count of the given dquot.
 109  * This value is protected by pinlock spinlock in the xQM structure.
 110  */
 111 STATIC void
 112 xfs_qm_dquot_logitem_pin(
 113         xfs_dq_logitem_t *logitem)
 114 {
 115         unsigned long   s;
 116         xfs_dquot_t *dqp;
 117
 118         dqp = logitem->qli_dquot;
 119         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 120         s = XFS_DQ_PINLOCK(dqp);
 121         dqp->q_pincount++;
 122         XFS_DQ_PINUNLOCK(dqp, s);
 123 }
 124
 125 /*
 126  * Decrement the pin count of the given dquot, and wake up
 127  * anyone in xfs_dqwait_unpin() if the count goes to 0.  The
 128  * dquot must have been previously pinned with a call to xfs_dqpin().
 129  */
 130 /* ARGSUSED */
 131 STATIC void
 132 xfs_qm_dquot_logitem_unpin(
 133         xfs_dq_logitem_t *logitem,
 134         int               stale)
 135 {
 136         unsigned long   s;
 137         xfs_dquot_t *dqp;
 138
 139         dqp = logitem->qli_dquot;
 140         ASSERT(dqp->q_pincount > 0);
 141         s = XFS_DQ_PINLOCK(dqp);
 142         dqp->q_pincount--;
 143         if (dqp->q_pincount == 0) {
 144                 sv_broadcast(&dqp->q_pinwait);
 145         }
 146         XFS_DQ_PINUNLOCK(dqp, s);
 147 }
 148
 149 /* ARGSUSED */
 150 STATIC void
 151 xfs_qm_dquot_logitem_unpin_remove(
 152         xfs_dq_logitem_t *logitem,
 153         xfs_trans_t      *tp)
 154 {
 155         xfs_qm_dquot_logitem_unpin(logitem, 0);
 156 }
 157
 158 /*
 159  * Given the logitem, this writes the corresponding dquot entry to disk
 160  * asynchronously. This is called with the dquot entry securely locked;
 161  * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot
 162  * at the end.
 163  */
 164 STATIC void
 165 xfs_qm_dquot_logitem_push(
 166         xfs_dq_logitem_t        *logitem)
 167 {
 168         xfs_dquot_t     *dqp;
 169
 170         dqp = logitem->qli_dquot;
 171
 172         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 173         ASSERT(XFS_DQ_IS_FLUSH_LOCKED(dqp));
 174
 175         /*
 176          * Since we were able to lock the dquot's flush lock and
 177          * we found it on the AIL, the dquot must be dirty.  This
 178          * is because the dquot is removed from the AIL while still
 179          * holding the flush lock in xfs_dqflush_done().  Thus, if
 180          * we found it in the AIL and were able to obtain the flush
 181          * lock without sleeping, then there must not have been
 182          * anyone in the process of flushing the dquot.
 183          */
 184         xfs_qm_dqflush(dqp, XFS_B_DELWRI);
 185         xfs_dqunlock(dqp);
 186 }
 187
 188 /*ARGSUSED*/
 189 STATIC xfs_lsn_t
 190 xfs_qm_dquot_logitem_committed(
 191         xfs_dq_logitem_t        *l,
 192         xfs_lsn_t               lsn)
 193 {
 194         /*
 195          * We always re-log the entire dquot when it becomes dirty,
 196          * so, the latest copy _is_ the only one that matters.
 197          */
 198         return (lsn);
 199 }
 200
 201
 202 /*
 203  * This is called to wait for the given dquot to be unpinned.
 204  * Most of these pin/unpin routines are plagiarized from inode code.
 205  */
 206 void
 207 xfs_qm_dqunpin_wait(
 208         xfs_dquot_t     *dqp)
 209 {
 210         SPLDECL(s);
 211
 212         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 213         if (dqp->q_pincount == 0) {
 214                 return;
 215         }
 216
 217         /*
 218          * Give the log a push so we don't wait here too long.
 219          */
 220         xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE);
 221         s = XFS_DQ_PINLOCK(dqp);
 222         if (dqp->q_pincount == 0) {
 223                 XFS_DQ_PINUNLOCK(dqp, s);
 224                 return;
 225         }
 226         sv_wait(&(dqp->q_pinwait), PINOD,
 227                 &(XFS_DQ_TO_QINF(dqp)->qi_pinlock), s);
 228 }
 229
 230 /*
 231  * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that
 232  * the dquot is locked by us, but the flush lock isn't. So, here we are
 233  * going to see if the relevant dquot buffer is incore, waiting on DELWRI.
 234  * If so, we want to push it out to help us take this item off the AIL as soon
 235  * as possible.
 236  *
 237  * We must not be holding the AIL_LOCK at this point. Calling incore() to
 238  * search the buffercache can be a time consuming thing, and AIL_LOCK is a
 239  * spinlock.
 240  */
 241 STATIC void
 242 xfs_qm_dquot_logitem_pushbuf(
 243         xfs_dq_logitem_t    *qip)
 244 {
 245         xfs_dquot_t     *dqp;
 246         xfs_mount_t     *mp;
 247         xfs_buf_t       *bp;
 248         uint            dopush;
 249
 250         dqp = qip->qli_dquot;
 251         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 252
 253         /*
 254          * The qli_pushbuf_flag keeps others from
 255          * trying to duplicate our effort.
 256          */
 257         ASSERT(qip->qli_pushbuf_flag != 0);
 258         ASSERT(qip->qli_push_owner == get_thread_id());
 259
 260         /*
 261          * If flushlock isn't locked anymore, chances are that the
 262          * inode flush completed and the inode was taken off the AIL.
 263          * So, just get out.
 264          */
 265         if ((valusema(&(dqp->q_flock)) > 0)  ||
 266             ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) {
 267                 qip->qli_pushbuf_flag = 0;
 268                 xfs_dqunlock(dqp);
 269                 return;
 270         }
 271         mp = dqp->q_mount;
 272         bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno,
 273                     XFS_QI_DQCHUNKLEN(mp),
 274                     XFS_INCORE_TRYLOCK);
 275         if (bp != NULL) {
 276                 if (XFS_BUF_ISDELAYWRITE(bp)) {
 277                         dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) &&
 278                                   (valusema(&(dqp->q_flock)) <= 0));
 279                         qip->qli_pushbuf_flag = 0;
 280                         xfs_dqunlock(dqp);
 281
 282                         if (XFS_BUF_ISPINNED(bp)) {
 283                                 xfs_log_force(mp, (xfs_lsn_t)0,
 284                                               XFS_LOG_FORCE);
 285                         }
 286                         if (dopush) {
 287 #ifdef XFSRACEDEBUG
 288                                 delay_for_intr();
 289                                 delay(300);
 290 #endif
 291                                 xfs_bawrite(mp, bp);
 292                         } else {
 293                                 xfs_buf_relse(bp);
 294                         }
 295                 } else {
 296                         qip->qli_pushbuf_flag = 0;
 297                         xfs_dqunlock(dqp);
 298                         xfs_buf_relse(bp);
 299                 }
 300                 return;
 301         }
 302
 303         qip->qli_pushbuf_flag = 0;
 304         xfs_dqunlock(dqp);
 305 }
 306
 307 /*
 308  * This is called to attempt to lock the dquot associated with this
 309  * dquot log item.  Don't sleep on the dquot lock or the flush lock.
 310  * If the flush lock is already held, indicating that the dquot has
 311  * been or is in the process of being flushed, then see if we can
 312  * find the dquot's buffer in the buffer cache without sleeping.  If
 313  * we can and it is marked delayed write, then we want to send it out.
 314  * We delay doing so until the push routine, though, to avoid sleeping
 315  * in any device strategy routines.
 316  */
 317 STATIC uint
 318 xfs_qm_dquot_logitem_trylock(
 319         xfs_dq_logitem_t        *qip)
 320 {
 321         xfs_dquot_t             *dqp;
 322         uint                    retval;
 323
 324         dqp = qip->qli_dquot;
 325         if (dqp->q_pincount > 0)
 326                 return (XFS_ITEM_PINNED);
 327
 328         if (! xfs_qm_dqlock_nowait(dqp))
 329                 return (XFS_ITEM_LOCKED);
 330
 331         retval = XFS_ITEM_SUCCESS;
 332         if (! xfs_qm_dqflock_nowait(dqp)) {
 333                 /*
 334                  * The dquot is already being flushed.  It may have been
 335                  * flushed delayed write, however, and we don't want to
 336                  * get stuck waiting for that to complete.  So, we want to check
 337                  * to see if we can lock the dquot's buffer without sleeping.
 338                  * If we can and it is marked for delayed write, then we
 339                  * hold it and send it out from the push routine.  We don't
 340                  * want to do that now since we might sleep in the device
 341                  * strategy routine.  We also don't want to grab the buffer lock
 342                  * here because we'd like not to call into the buffer cache
 343                  * while holding the AIL_LOCK.
 344                  * Make sure to only return PUSHBUF if we set pushbuf_flag
 345                  * ourselves.  If someone else is doing it then we don't
 346                  * want to go to the push routine and duplicate their efforts.
 347                  */
 348                 if (qip->qli_pushbuf_flag == 0) {
 349                         qip->qli_pushbuf_flag = 1;
 350                         ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno);
 351 #ifdef DEBUG
 352                         qip->qli_push_owner = get_thread_id();
 353 #endif
 354                         /*
 355                          * The dquot is left locked.
 356                          */
 357                         retval = XFS_ITEM_PUSHBUF;
 358                 } else {
 359                         retval = XFS_ITEM_FLUSHING;
 360                         xfs_dqunlock_nonotify(dqp);
 361                 }
 362         }
 363
 364         ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL);
 365         return (retval);
 366 }
 367
 368
 369 /*
 370  * Unlock the dquot associated with the log item.
 371  * Clear the fields of the dquot and dquot log item that
 372  * are specific to the current transaction.  If the
 373  * hold flags is set, do not unlock the dquot.
 374  */
 375 STATIC void
 376 xfs_qm_dquot_logitem_unlock(
 377         xfs_dq_logitem_t    *ql)
 378 {
 379         xfs_dquot_t     *dqp;
 380
 381         ASSERT(ql != NULL);
 382         dqp = ql->qli_dquot;
 383         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 384
 385         /*
 386          * Clear the transaction pointer in the dquot
 387          */
 388         dqp->q_transp = NULL;
 389
 390         /*
 391          * dquots are never 'held' from getting unlocked at the end of
 392          * a transaction.  Their locking and unlocking is hidden inside the
 393          * transaction layer, within trans_commit. Hence, no LI_HOLD flag
 394          * for the logitem.
 395          */
 396         xfs_dqunlock(dqp);
 397 }
 398
 399
 400 /*
 401  * The transaction with the dquot locked has aborted.  The dquot
 402  * must not be dirty within the transaction.  We simply unlock just
 403  * as if the transaction had been cancelled.
 404  */
 405 STATIC void
 406 xfs_qm_dquot_logitem_abort(
 407         xfs_dq_logitem_t    *ql)
 408 {
 409         xfs_qm_dquot_logitem_unlock(ql);
 410 }
 411
 412 /*
 413  * this needs to stamp an lsn into the dquot, I think.
 414  * rpc's that look at user dquot's would then have to
 415  * push on the dependency recorded in the dquot
 416  */
 417 /* ARGSUSED */
 418 STATIC void
 419 xfs_qm_dquot_logitem_committing(
 420         xfs_dq_logitem_t        *l,
 421         xfs_lsn_t               lsn)
 422 {
 423         return;
 424 }
 425
 426
 427 /*
 428  * This is the ops vector for dquots
 429  */
 430 STATIC struct xfs_item_ops xfs_dquot_item_ops = {
 431         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
 432         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 433                                         xfs_qm_dquot_logitem_format,
 434         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin,
 435         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 436                                         xfs_qm_dquot_logitem_unpin,
 437         .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*))
 438                                         xfs_qm_dquot_logitem_unpin_remove,
 439         .iop_trylock    = (uint(*)(xfs_log_item_t*))
 440                                         xfs_qm_dquot_logitem_trylock,
 441         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock,
 442         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 443                                         xfs_qm_dquot_logitem_committed,
 444         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push,
 445         .iop_abort      = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_abort,
 446         .iop_pushbuf    = (void(*)(xfs_log_item_t*))
 447                                         xfs_qm_dquot_logitem_pushbuf,
 448         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 449                                         xfs_qm_dquot_logitem_committing
 450 };
 451
 452 /*
 453  * Initialize the dquot log item for a newly allocated dquot.
 454  * The dquot isn't locked at this point, but it isn't on any of the lists
 455  * either, so we don't care.
 456  */
 457 void
 458 xfs_qm_dquot_logitem_init(
 459         struct xfs_dquot *dqp)
 460 {
 461         xfs_dq_logitem_t  *lp;
 462         lp = &dqp->q_logitem;
 463
 464         lp->qli_item.li_type = XFS_LI_DQUOT;
 465         lp->qli_item.li_ops = &xfs_dquot_item_ops;
 466         lp->qli_item.li_mountp = dqp->q_mount;
 467         lp->qli_dquot = dqp;
 468         lp->qli_format.qlf_type = XFS_LI_DQUOT;
 469         lp->qli_format.qlf_id = INT_GET(dqp->q_core.d_id, ARCH_CONVERT);
 470         lp->qli_format.qlf_blkno = dqp->q_blkno;
 471         lp->qli_format.qlf_len = 1;
 472         /*
 473          * This is just the offset of this dquot within its buffer
 474          * (which is currently 1 FSB and probably won't change).
 475          * Hence 32 bits for this offset should be just fine.
 476          * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t))
 477          * here, and recompute it at recovery time.
 478          */
 479         lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset;
 480 }
 481
 482 /*------------------  QUOTAOFF LOG ITEMS  -------------------*/
 483
 484 /*
 485  * This returns the number of iovecs needed to log the given quotaoff item.
 486  * We only need 1 iovec for an quotaoff item.  It just logs the
 487  * quotaoff_log_format structure.
 488  */
 489 /*ARGSUSED*/
 490 STATIC uint
 491 xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf)
 492 {
 493         return (1);
 494 }
 495
 496 /*
 497  * This is called to fill in the vector of log iovecs for the
 498  * given quotaoff log item. We use only 1 iovec, and we point that
 499  * at the quotaoff_log_format structure embedded in the quotaoff item.
 500  * It is at this point that we assert that all of the extent
 501  * slots in the quotaoff item have been filled.
 502  */
 503 STATIC void
 504 xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t   *qf,
 505                            xfs_log_iovec_t      *log_vector)
 506 {
 507         ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF);
 508
 509         log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format);
 510         log_vector->i_len = sizeof(xfs_qoff_logitem_t);
 511         XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF);
 512         qf->qql_format.qf_size = 1;
 513 }
 514
 515
 516 /*
 517  * Pinning has no meaning for an quotaoff item, so just return.
 518  */
 519 /*ARGSUSED*/
 520 STATIC void
 521 xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf)
 522 {
 523         return;
 524 }
 525
 526
 527 /*
 528  * Since pinning has no meaning for an quotaoff item, unpinning does
 529  * not either.
 530  */
 531 /*ARGSUSED*/
 532 STATIC void
 533 xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale)
 534 {
 535         return;
 536 }
 537
 538 /*ARGSUSED*/
 539 STATIC void
 540 xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp)
 541 {
 542         return;
 543 }
 544
 545 /*
 546  * Quotaoff items have no locking, so just return success.
 547  */
 548 /*ARGSUSED*/
 549 STATIC uint
 550 xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf)
 551 {
 552         return XFS_ITEM_LOCKED;
 553 }
 554
 555 /*
 556  * Quotaoff items have no locking or pushing, so return failure
 557  * so that the caller doesn't bother with us.
 558  */
 559 /*ARGSUSED*/
 560 STATIC void
 561 xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf)
 562 {
 563         return;
 564 }
 565
 566 /*
 567  * The quotaoff-start-item is logged only once and cannot be moved in the log,
 568  * so simply return the lsn at which it's been logged.
 569  */
 570 /*ARGSUSED*/
 571 STATIC xfs_lsn_t
 572 xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn)
 573 {
 574         return (lsn);
 575 }
 576
 577 /*
 578  * The transaction of which this QUOTAOFF is a part has been aborted.
 579  * Just clean up after ourselves.
 580  * Shouldn't this never happen in the case of qoffend logitems? XXX
 581  */
 582 STATIC void
 583 xfs_qm_qoff_logitem_abort(xfs_qoff_logitem_t *qf)
 584 {
 585         kmem_free(qf, sizeof(xfs_qoff_logitem_t));
 586 }
 587
 588 /*
 589  * There isn't much you can do to push on an quotaoff item.  It is simply
 590  * stuck waiting for the log to be flushed to disk.
 591  */
 592 /*ARGSUSED*/
 593 STATIC void
 594 xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf)
 595 {
 596         return;
 597 }
 598
 599
 600 /*ARGSUSED*/
 601 STATIC xfs_lsn_t
 602 xfs_qm_qoffend_logitem_committed(
 603         xfs_qoff_logitem_t *qfe,
 604         xfs_lsn_t lsn)
 605 {
 606         xfs_qoff_logitem_t      *qfs;
 607         SPLDECL(s);
 608
 609         qfs = qfe->qql_start_lip;
 610         AIL_LOCK(qfs->qql_item.li_mountp,s);
 611         /*
 612          * Delete the qoff-start logitem from the AIL.
 613          * xfs_trans_delete_ail() drops the AIL lock.
 614          */
 615         xfs_trans_delete_ail(qfs->qql_item.li_mountp, (xfs_log_item_t *)qfs, s);
 616         kmem_free(qfs, sizeof(xfs_qoff_logitem_t));
 617         kmem_free(qfe, sizeof(xfs_qoff_logitem_t));
 618         return (xfs_lsn_t)-1;
 619 }
 620
 621 /*
 622  * XXX rcc - don't know quite what to do with this.  I think we can
 623  * just ignore it.  The only time that isn't the case is if we allow
 624  * the client to somehow see that quotas have been turned off in which
 625  * we can't allow that to get back until the quotaoff hits the disk.
 626  * So how would that happen?  Also, do we need different routines for
 627  * quotaoff start and quotaoff end?  I suspect the answer is yes but
 628  * to be sure, I need to look at the recovery code and see how quota off
 629  * recovery is handled (do we roll forward or back or do something else).
 630  * If we roll forwards or backwards, then we need two separate routines,
 631  * one that does nothing and one that stamps in the lsn that matters
 632  * (truly makes the quotaoff irrevocable).  If we do something else,
 633  * then maybe we don't need two.
 634  */
 635 /* ARGSUSED */
 636 STATIC void
 637 xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 638 {
 639         return;
 640 }
 641
 642 /* ARGSUSED */
 643 STATIC void
 644 xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 645 {
 646         return;
 647 }
 648
 649 STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 650         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 651         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 652                                         xfs_qm_qoff_logitem_format,
 653         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 654         .iop_unpin      = (void(*)(xfs_log_item_t* ,int))
 655                                         xfs_qm_qoff_logitem_unpin,
 656         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 657                                         xfs_qm_qoff_logitem_unpin_remove,
 658         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 659         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 660         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 661                                         xfs_qm_qoffend_logitem_committed,
 662         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 663         .iop_abort      = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort,
 664         .iop_pushbuf    = NULL,
 665         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 666                                         xfs_qm_qoffend_logitem_committing
 667 };
 668
 669 /*
 670  * This is the ops vector shared by all quotaoff-start log items.
 671  */
 672 STATIC struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 673         .iop_size       = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 674         .iop_format     = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 675                                         xfs_qm_qoff_logitem_format,
 676         .iop_pin        = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin,
 677         .iop_unpin      = (void(*)(xfs_log_item_t*, int))
 678                                         xfs_qm_qoff_logitem_unpin,
 679         .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*))
 680                                         xfs_qm_qoff_logitem_unpin_remove,
 681         .iop_trylock    = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock,
 682         .iop_unlock     = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock,
 683         .iop_committed  = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t))
 684                                         xfs_qm_qoff_logitem_committed,
 685         .iop_push       = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push,
 686         .iop_abort      = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_abort,
 687         .iop_pushbuf    = NULL,
 688         .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t))
 689                                         xfs_qm_qoff_logitem_committing
 690 };
 691
 692 /*
 693  * Allocate and initialize an quotaoff item of the correct quota type(s).
 694  */
 695 xfs_qoff_logitem_t *
 696 xfs_qm_qoff_logitem_init(
 697         struct xfs_mount *mp,
 698         xfs_qoff_logitem_t *start,
 699         uint flags)
 700 {
 701         xfs_qoff_logitem_t      *qf;
 702
 703         qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP);
 704
 705         qf->qql_item.li_type = XFS_LI_QUOTAOFF;
 706         if (start)
 707                 qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops;
 708         else
 709                 qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops;
 710         qf->qql_item.li_mountp = mp;
 711         qf->qql_format.qf_type = XFS_LI_QUOTAOFF;
 712         qf->qql_format.qf_flags = flags;
 713         qf->qql_start_lip = start;
 714         return (qf);
 715 }