fs/xfs/xfs_trans_dquot.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000-2002 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6 #include "xfs.h"
   7 #include "xfs_fs.h"
   8 #include "xfs_shared.h"
   9 #include "xfs_format.h"
  10 #include "xfs_log_format.h"
  11 #include "xfs_trans_resv.h"
  12 #include "xfs_mount.h"
  13 #include "xfs_inode.h"
  14 #include "xfs_error.h"
  15 #include "xfs_trans.h"
  16 #include "xfs_trans_priv.h"
  17 #include "xfs_quota.h"
  18 #include "xfs_qm.h"
  19
  20 STATIC void     xfs_trans_alloc_dqinfo(xfs_trans_t *);
  21
  22 /*
  23  * Add the locked dquot to the transaction.
  24  * The dquot must be locked, and it cannot be associated with any
  25  * transaction.
  26  */
  27 void
  28 xfs_trans_dqjoin(
  29         xfs_trans_t     *tp,
  30         xfs_dquot_t     *dqp)
  31 {
  32         ASSERT(dqp->q_transp != tp);
  33         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  34         ASSERT(dqp->q_logitem.qli_dquot == dqp);
  35
  36         /*
  37          * Get a log_item_desc to point at the new item.
  38          */
  39         xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
  40
  41         /*
  42          * Initialize d_transp so we can later determine if this dquot is
  43          * associated with this transaction.
  44          */
  45         dqp->q_transp = tp;
  46 }
  47
  48
  49 /*
  50  * This is called to mark the dquot as needing
  51  * to be logged when the transaction is committed.  The dquot must
  52  * already be associated with the given transaction.
  53  * Note that it marks the entire transaction as dirty. In the ordinary
  54  * case, this gets called via xfs_trans_commit, after the transaction
  55  * is already dirty. However, there's nothing stop this from getting
  56  * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
  57  * flag.
  58  */
  59 void
  60 xfs_trans_log_dquot(
  61         xfs_trans_t     *tp,
  62         xfs_dquot_t     *dqp)
  63 {
  64         ASSERT(dqp->q_transp == tp);
  65         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  66
  67         tp->t_flags |= XFS_TRANS_DIRTY;
  68         set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
  69 }
  70
  71 /*
  72  * Carry forward whatever is left of the quota blk reservation to
  73  * the spanky new transaction
  74  */
  75 void
  76 xfs_trans_dup_dqinfo(
  77         xfs_trans_t     *otp,
  78         xfs_trans_t     *ntp)
  79 {
  80         xfs_dqtrx_t     *oq, *nq;
  81         int             i, j;
  82         xfs_dqtrx_t     *oqa, *nqa;
  83         ulong           blk_res_used;
  84
  85         if (!otp->t_dqinfo)
  86                 return;
  87
  88         xfs_trans_alloc_dqinfo(ntp);
  89
  90         /*
  91          * Because the quota blk reservation is carried forward,
  92          * it is also necessary to carry forward the DQ_DIRTY flag.
  93          */
  94         if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
  95                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
  96
  97         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
  98                 oqa = otp->t_dqinfo->dqs[j];
  99                 nqa = ntp->t_dqinfo->dqs[j];
 100                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 101                         blk_res_used = 0;
 102
 103                         if (oqa[i].qt_dquot == NULL)
 104                                 break;
 105                         oq = &oqa[i];
 106                         nq = &nqa[i];
 107
 108                         if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
 109                                 blk_res_used = oq->qt_bcount_delta;
 110
 111                         nq->qt_dquot = oq->qt_dquot;
 112                         nq->qt_bcount_delta = nq->qt_icount_delta = 0;
 113                         nq->qt_rtbcount_delta = 0;
 114
 115                         /*
 116                          * Transfer whatever is left of the reservations.
 117                          */
 118                         nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
 119                         oq->qt_blk_res = blk_res_used;
 120
 121                         nq->qt_rtblk_res = oq->qt_rtblk_res -
 122                                 oq->qt_rtblk_res_used;
 123                         oq->qt_rtblk_res = oq->qt_rtblk_res_used;
 124
 125                         nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
 126                         oq->qt_ino_res = oq->qt_ino_res_used;
 127
 128                 }
 129         }
 130 }
 131
 132 /*
 133  * Wrap around mod_dquot to account for both user and group quotas.
 134  */
 135 void
 136 xfs_trans_mod_dquot_byino(
 137         xfs_trans_t     *tp,
 138         xfs_inode_t     *ip,
 139         uint            field,
 140         long            delta)
 141 {
 142         xfs_mount_t     *mp = tp->t_mountp;
 143
 144         if (!XFS_IS_QUOTA_RUNNING(mp) ||
 145             !XFS_IS_QUOTA_ON(mp) ||
 146             xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
 147                 return;
 148
 149         if (tp->t_dqinfo == NULL)
 150                 xfs_trans_alloc_dqinfo(tp);
 151
 152         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
 153                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
 154         if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
 155                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
 156         if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
 157                 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
 158 }
 159
 160 STATIC struct xfs_dqtrx *
 161 xfs_trans_get_dqtrx(
 162         struct xfs_trans        *tp,
 163         struct xfs_dquot        *dqp)
 164 {
 165         int                     i;
 166         struct xfs_dqtrx        *qa;
 167
 168         if (XFS_QM_ISUDQ(dqp))
 169                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
 170         else if (XFS_QM_ISGDQ(dqp))
 171                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
 172         else if (XFS_QM_ISPDQ(dqp))
 173                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
 174         else
 175                 return NULL;
 176
 177         for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 178                 if (qa[i].qt_dquot == NULL ||
 179                     qa[i].qt_dquot == dqp)
 180                         return &qa[i];
 181         }
 182
 183         return NULL;
 184 }
 185
 186 /*
 187  * Make the changes in the transaction structure.
 188  * The moral equivalent to xfs_trans_mod_sb().
 189  * We don't touch any fields in the dquot, so we don't care
 190  * if it's locked or not (most of the time it won't be).
 191  */
 192 void
 193 xfs_trans_mod_dquot(
 194         xfs_trans_t     *tp,
 195         xfs_dquot_t     *dqp,
 196         uint            field,
 197         long            delta)
 198 {
 199         xfs_dqtrx_t     *qtrx;
 200
 201         ASSERT(tp);
 202         ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
 203         qtrx = NULL;
 204
 205         if (tp->t_dqinfo == NULL)
 206                 xfs_trans_alloc_dqinfo(tp);
 207         /*
 208          * Find either the first free slot or the slot that belongs
 209          * to this dquot.
 210          */
 211         qtrx = xfs_trans_get_dqtrx(tp, dqp);
 212         ASSERT(qtrx);
 213         if (qtrx->qt_dquot == NULL)
 214                 qtrx->qt_dquot = dqp;
 215
 216         switch (field) {
 217
 218                 /*
 219                  * regular disk blk reservation
 220                  */
 221               case XFS_TRANS_DQ_RES_BLKS:
 222                 qtrx->qt_blk_res += (ulong)delta;
 223                 break;
 224
 225                 /*
 226                  * inode reservation
 227                  */
 228               case XFS_TRANS_DQ_RES_INOS:
 229                 qtrx->qt_ino_res += (ulong)delta;
 230                 break;
 231
 232                 /*
 233                  * disk blocks used.
 234                  */
 235               case XFS_TRANS_DQ_BCOUNT:
 236                 qtrx->qt_bcount_delta += delta;
 237                 break;
 238
 239               case XFS_TRANS_DQ_DELBCOUNT:
 240                 qtrx->qt_delbcnt_delta += delta;
 241                 break;
 242
 243                 /*
 244                  * Inode Count
 245                  */
 246               case XFS_TRANS_DQ_ICOUNT:
 247                 if (qtrx->qt_ino_res && delta > 0) {
 248                         qtrx->qt_ino_res_used += (ulong)delta;
 249                         ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
 250                 }
 251                 qtrx->qt_icount_delta += delta;
 252                 break;
 253
 254                 /*
 255                  * rtblk reservation
 256                  */
 257               case XFS_TRANS_DQ_RES_RTBLKS:
 258                 qtrx->qt_rtblk_res += (ulong)delta;
 259                 break;
 260
 261                 /*
 262                  * rtblk count
 263                  */
 264               case XFS_TRANS_DQ_RTBCOUNT:
 265                 if (qtrx->qt_rtblk_res && delta > 0) {
 266                         qtrx->qt_rtblk_res_used += (ulong)delta;
 267                         ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
 268                 }
 269                 qtrx->qt_rtbcount_delta += delta;
 270                 break;
 271
 272               case XFS_TRANS_DQ_DELRTBCOUNT:
 273                 qtrx->qt_delrtb_delta += delta;
 274                 break;
 275
 276               default:
 277                 ASSERT(0);
 278         }
 279         tp->t_flags |= XFS_TRANS_DQ_DIRTY;
 280 }
 281
 282
 283 /*
 284  * Given an array of dqtrx structures, lock all the dquots associated and join
 285  * them to the transaction, provided they have been modified.  We know that the
 286  * highest number of dquots of one type - usr, grp and prj - involved in a
 287  * transaction is 3 so we don't need to make this very generic.
 288  */
 289 STATIC void
 290 xfs_trans_dqlockedjoin(
 291         xfs_trans_t     *tp,
 292         xfs_dqtrx_t     *q)
 293 {
 294         ASSERT(q[0].qt_dquot != NULL);
 295         if (q[1].qt_dquot == NULL) {
 296                 xfs_dqlock(q[0].qt_dquot);
 297                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 298         } else {
 299                 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
 300                 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
 301                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 302                 xfs_trans_dqjoin(tp, q[1].qt_dquot);
 303         }
 304 }
 305
 306
 307 /*
 308  * Called by xfs_trans_commit() and similar in spirit to
 309  * xfs_trans_apply_sb_deltas().
 310  * Go thru all the dquots belonging to this transaction and modify the
 311  * INCORE dquot to reflect the actual usages.
 312  * Unreserve just the reservations done by this transaction.
 313  * dquot is still left locked at exit.
 314  */
 315 void
 316 xfs_trans_apply_dquot_deltas(
 317         struct xfs_trans        *tp)
 318 {
 319         int                     i, j;
 320         struct xfs_dquot        *dqp;
 321         struct xfs_dqtrx        *qtrx, *qa;
 322         struct xfs_disk_dquot   *d;
 323         long                    totalbdelta;
 324         long                    totalrtbdelta;
 325
 326         if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 327                 return;
 328
 329         ASSERT(tp->t_dqinfo);
 330         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 331                 qa = tp->t_dqinfo->dqs[j];
 332                 if (qa[0].qt_dquot == NULL)
 333                         continue;
 334
 335                 /*
 336                  * Lock all of the dquots and join them to the transaction.
 337                  */
 338                 xfs_trans_dqlockedjoin(tp, qa);
 339
 340                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 341                         qtrx = &qa[i];
 342                         /*
 343                          * The array of dquots is filled
 344                          * sequentially, not sparsely.
 345                          */
 346                         if ((dqp = qtrx->qt_dquot) == NULL)
 347                                 break;
 348
 349                         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 350                         ASSERT(dqp->q_transp == tp);
 351
 352                         /*
 353                          * adjust the actual number of blocks used
 354                          */
 355                         d = &dqp->q_core;
 356
 357                         /*
 358                          * The issue here is - sometimes we don't make a blkquota
 359                          * reservation intentionally to be fair to users
 360                          * (when the amount is small). On the other hand,
 361                          * delayed allocs do make reservations, but that's
 362                          * outside of a transaction, so we have no
 363                          * idea how much was really reserved.
 364                          * So, here we've accumulated delayed allocation blks and
 365                          * non-delay blks. The assumption is that the
 366                          * delayed ones are always reserved (outside of a
 367                          * transaction), and the others may or may not have
 368                          * quota reservations.
 369                          */
 370                         totalbdelta = qtrx->qt_bcount_delta +
 371                                 qtrx->qt_delbcnt_delta;
 372                         totalrtbdelta = qtrx->qt_rtbcount_delta +
 373                                 qtrx->qt_delrtb_delta;
 374 #ifdef DEBUG
 375                         if (totalbdelta < 0)
 376                                 ASSERT(be64_to_cpu(d->d_bcount) >=
 377                                        -totalbdelta);
 378
 379                         if (totalrtbdelta < 0)
 380                                 ASSERT(be64_to_cpu(d->d_rtbcount) >=
 381                                        -totalrtbdelta);
 382
 383                         if (qtrx->qt_icount_delta < 0)
 384                                 ASSERT(be64_to_cpu(d->d_icount) >=
 385                                        -qtrx->qt_icount_delta);
 386 #endif
 387                         if (totalbdelta)
 388                                 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
 389
 390                         if (qtrx->qt_icount_delta)
 391                                 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
 392
 393                         if (totalrtbdelta)
 394                                 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
 395
 396                         /*
 397                          * Get any default limits in use.
 398                          * Start/reset the timer(s) if needed.
 399                          */
 400                         if (d->d_id) {
 401                                 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
 402                                 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
 403                         }
 404
 405                         dqp->dq_flags |= XFS_DQ_DIRTY;
 406                         /*
 407                          * add this to the list of items to get logged
 408                          */
 409                         xfs_trans_log_dquot(tp, dqp);
 410                         /*
 411                          * Take off what's left of the original reservation.
 412                          * In case of delayed allocations, there's no
 413                          * reservation that a transaction structure knows of.
 414                          */
 415                         if (qtrx->qt_blk_res != 0) {
 416                                 ulong blk_res_used = 0;
 417
 418                                 if (qtrx->qt_bcount_delta > 0)
 419                                         blk_res_used = qtrx->qt_bcount_delta;
 420
 421                                 if (qtrx->qt_blk_res != blk_res_used) {
 422                                         if (qtrx->qt_blk_res > blk_res_used)
 423                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 424                                                         (qtrx->qt_blk_res -
 425                                                          blk_res_used);
 426                                         else
 427                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 428                                                         (blk_res_used -
 429                                                          qtrx->qt_blk_res);
 430                                 }
 431                         } else {
 432                                 /*
 433                                  * These blks were never reserved, either inside
 434                                  * a transaction or outside one (in a delayed
 435                                  * allocation). Also, this isn't always a
 436                                  * negative number since we sometimes
 437                                  * deliberately skip quota reservations.
 438                                  */
 439                                 if (qtrx->qt_bcount_delta) {
 440                                         dqp->q_res_bcount +=
 441                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
 442                                 }
 443                         }
 444                         /*
 445                          * Adjust the RT reservation.
 446                          */
 447                         if (qtrx->qt_rtblk_res != 0) {
 448                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
 449                                         if (qtrx->qt_rtblk_res >
 450                                             qtrx->qt_rtblk_res_used)
 451                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 452                                                        (qtrx->qt_rtblk_res -
 453                                                         qtrx->qt_rtblk_res_used);
 454                                         else
 455                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 456                                                        (qtrx->qt_rtblk_res_used -
 457                                                         qtrx->qt_rtblk_res);
 458                                 }
 459                         } else {
 460                                 if (qtrx->qt_rtbcount_delta)
 461                                         dqp->q_res_rtbcount +=
 462                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
 463                         }
 464
 465                         /*
 466                          * Adjust the inode reservation.
 467                          */
 468                         if (qtrx->qt_ino_res != 0) {
 469                                 ASSERT(qtrx->qt_ino_res >=
 470                                        qtrx->qt_ino_res_used);
 471                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
 472                                         dqp->q_res_icount -= (xfs_qcnt_t)
 473                                                 (qtrx->qt_ino_res -
 474                                                  qtrx->qt_ino_res_used);
 475                         } else {
 476                                 if (qtrx->qt_icount_delta)
 477                                         dqp->q_res_icount +=
 478                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
 479                         }
 480
 481                         ASSERT(dqp->q_res_bcount >=
 482                                 be64_to_cpu(dqp->q_core.d_bcount));
 483                         ASSERT(dqp->q_res_icount >=
 484                                 be64_to_cpu(dqp->q_core.d_icount));
 485                         ASSERT(dqp->q_res_rtbcount >=
 486                                 be64_to_cpu(dqp->q_core.d_rtbcount));
 487                 }
 488         }
 489 }
 490
 491 /*
 492  * Release the reservations, and adjust the dquots accordingly.
 493  * This is called only when the transaction is being aborted. If by
 494  * any chance we have done dquot modifications incore (ie. deltas) already,
 495  * we simply throw those away, since that's the expected behavior
 496  * when a transaction is curtailed without a commit.
 497  */
 498 void
 499 xfs_trans_unreserve_and_mod_dquots(
 500         xfs_trans_t             *tp)
 501 {
 502         int                     i, j;
 503         xfs_dquot_t             *dqp;
 504         xfs_dqtrx_t             *qtrx, *qa;
 505         bool                    locked;
 506
 507         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 508                 return;
 509
 510         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 511                 qa = tp->t_dqinfo->dqs[j];
 512
 513                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 514                         qtrx = &qa[i];
 515                         /*
 516                          * We assume that the array of dquots is filled
 517                          * sequentially, not sparsely.
 518                          */
 519                         if ((dqp = qtrx->qt_dquot) == NULL)
 520                                 break;
 521                         /*
 522                          * Unreserve the original reservation. We don't care
 523                          * about the number of blocks used field, or deltas.
 524                          * Also we don't bother to zero the fields.
 525                          */
 526                         locked = false;
 527                         if (qtrx->qt_blk_res) {
 528                                 xfs_dqlock(dqp);
 529                                 locked = true;
 530                                 dqp->q_res_bcount -=
 531                                         (xfs_qcnt_t)qtrx->qt_blk_res;
 532                         }
 533                         if (qtrx->qt_ino_res) {
 534                                 if (!locked) {
 535                                         xfs_dqlock(dqp);
 536                                         locked = true;
 537                                 }
 538                                 dqp->q_res_icount -=
 539                                         (xfs_qcnt_t)qtrx->qt_ino_res;
 540                         }
 541
 542                         if (qtrx->qt_rtblk_res) {
 543                                 if (!locked) {
 544                                         xfs_dqlock(dqp);
 545                                         locked = true;
 546                                 }
 547                                 dqp->q_res_rtbcount -=
 548                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
 549                         }
 550                         if (locked)
 551                                 xfs_dqunlock(dqp);
 552
 553                 }
 554         }
 555 }
 556
 557 STATIC void
 558 xfs_quota_warn(
 559         struct xfs_mount        *mp,
 560         struct xfs_dquot        *dqp,
 561         int                     type)
 562 {
 563         enum quota_type qtype;
 564
 565         if (dqp->dq_flags & XFS_DQ_PROJ)
 566                 qtype = PRJQUOTA;
 567         else if (dqp->dq_flags & XFS_DQ_USER)
 568                 qtype = USRQUOTA;
 569         else
 570                 qtype = GRPQUOTA;
 571
 572         quota_send_warning(make_kqid(&init_user_ns, qtype,
 573                                      be32_to_cpu(dqp->q_core.d_id)),
 574                            mp->m_super->s_dev, type);
 575 }
 576
 577 /*
 578  * This reserves disk blocks and inodes against a dquot.
 579  * Flags indicate if the dquot is to be locked here and also
 580  * if the blk reservation is for RT or regular blocks.
 581  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
 582  */
 583 STATIC int
 584 xfs_trans_dqresv(
 585         xfs_trans_t     *tp,
 586         xfs_mount_t     *mp,
 587         xfs_dquot_t     *dqp,
 588         long            nblks,
 589         long            ninos,
 590         uint            flags)
 591 {
 592         xfs_qcnt_t      hardlimit;
 593         xfs_qcnt_t      softlimit;
 594         time_t          timer;
 595         xfs_qwarncnt_t  warns;
 596         xfs_qwarncnt_t  warnlimit;
 597         xfs_qcnt_t      total_count;
 598         xfs_qcnt_t      *resbcountp;
 599         xfs_quotainfo_t *q = mp->m_quotainfo;
 600         struct xfs_def_quota    *defq;
 601
 602
 603         xfs_dqlock(dqp);
 604
 605         defq = xfs_get_defquota(dqp, q);
 606
 607         if (flags & XFS_TRANS_DQ_RES_BLKS) {
 608                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
 609                 if (!hardlimit)
 610                         hardlimit = defq->bhardlimit;
 611                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
 612                 if (!softlimit)
 613                         softlimit = defq->bsoftlimit;
 614                 timer = be32_to_cpu(dqp->q_core.d_btimer);
 615                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
 616                 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
 617                 resbcountp = &dqp->q_res_bcount;
 618         } else {
 619                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
 620                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
 621                 if (!hardlimit)
 622                         hardlimit = defq->rtbhardlimit;
 623                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
 624                 if (!softlimit)
 625                         softlimit = defq->rtbsoftlimit;
 626                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
 627                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
 628                 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
 629                 resbcountp = &dqp->q_res_rtbcount;
 630         }
 631
 632         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
 633             dqp->q_core.d_id &&
 634             ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
 635              (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
 636              (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
 637                 if (nblks > 0) {
 638                         /*
 639                          * dquot is locked already. See if we'd go over the
 640                          * hardlimit or exceed the timelimit if we allocate
 641                          * nblks.
 642                          */
 643                         total_count = *resbcountp + nblks;
 644                         if (hardlimit && total_count > hardlimit) {
 645                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
 646                                 goto error_return;
 647                         }
 648                         if (softlimit && total_count > softlimit) {
 649                                 if ((timer != 0 && get_seconds() > timer) ||
 650                                     (warns != 0 && warns >= warnlimit)) {
 651                                         xfs_quota_warn(mp, dqp,
 652                                                        QUOTA_NL_BSOFTLONGWARN);
 653                                         goto error_return;
 654                                 }
 655
 656                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
 657                         }
 658                 }
 659                 if (ninos > 0) {
 660                         total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
 661                         timer = be32_to_cpu(dqp->q_core.d_itimer);
 662                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
 663                         warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
 664                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
 665                         if (!hardlimit)
 666                                 hardlimit = defq->ihardlimit;
 667                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
 668                         if (!softlimit)
 669                                 softlimit = defq->isoftlimit;
 670
 671                         if (hardlimit && total_count > hardlimit) {
 672                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
 673                                 goto error_return;
 674                         }
 675                         if (softlimit && total_count > softlimit) {
 676                                 if  ((timer != 0 && get_seconds() > timer) ||
 677                                      (warns != 0 && warns >= warnlimit)) {
 678                                         xfs_quota_warn(mp, dqp,
 679                                                        QUOTA_NL_ISOFTLONGWARN);
 680                                         goto error_return;
 681                                 }
 682                                 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
 683                         }
 684                 }
 685         }
 686
 687         /*
 688          * Change the reservation, but not the actual usage.
 689          * Note that q_res_bcount = q_core.d_bcount + resv
 690          */
 691         (*resbcountp) += (xfs_qcnt_t)nblks;
 692         if (ninos != 0)
 693                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
 694
 695         /*
 696          * note the reservation amt in the trans struct too,
 697          * so that the transaction knows how much was reserved by
 698          * it against this particular dquot.
 699          * We don't do this when we are reserving for a delayed allocation,
 700          * because we don't have the luxury of a transaction envelope then.
 701          */
 702         if (tp) {
 703                 ASSERT(tp->t_dqinfo);
 704                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 705                 if (nblks != 0)
 706                         xfs_trans_mod_dquot(tp, dqp,
 707                                             flags & XFS_QMOPT_RESBLK_MASK,
 708                                             nblks);
 709                 if (ninos != 0)
 710                         xfs_trans_mod_dquot(tp, dqp,
 711                                             XFS_TRANS_DQ_RES_INOS,
 712                                             ninos);
 713         }
 714         ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
 715         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
 716         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
 717
 718         xfs_dqunlock(dqp);
 719         return 0;
 720
 721 error_return:
 722         xfs_dqunlock(dqp);
 723         if (flags & XFS_QMOPT_ENOSPC)
 724                 return -ENOSPC;
 725         return -EDQUOT;
 726 }
 727
 728
 729 /*
 730  * Given dquot(s), make disk block and/or inode reservations against them.
 731  * The fact that this does the reservation against user, group and
 732  * project quotas is important, because this follows a all-or-nothing
 733  * approach.
 734  *
 735  * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
 736  *         XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT.  Used by pquota.
 737  *         XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
 738  *         XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
 739  * dquots are unlocked on return, if they were not locked by caller.
 740  */
 741 int
 742 xfs_trans_reserve_quota_bydquots(
 743         struct xfs_trans        *tp,
 744         struct xfs_mount        *mp,
 745         struct xfs_dquot        *udqp,
 746         struct xfs_dquot        *gdqp,
 747         struct xfs_dquot        *pdqp,
 748         long                    nblks,
 749         long                    ninos,
 750         uint                    flags)
 751 {
 752         int             error;
 753
 754         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 755                 return 0;
 756
 757         if (tp && tp->t_dqinfo == NULL)
 758                 xfs_trans_alloc_dqinfo(tp);
 759
 760         ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 761
 762         if (udqp) {
 763                 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
 764                                         (flags & ~XFS_QMOPT_ENOSPC));
 765                 if (error)
 766                         return error;
 767         }
 768
 769         if (gdqp) {
 770                 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
 771                 if (error)
 772                         goto unwind_usr;
 773         }
 774
 775         if (pdqp) {
 776                 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
 777                 if (error)
 778                         goto unwind_grp;
 779         }
 780
 781         /*
 782          * Didn't change anything critical, so, no need to log
 783          */
 784         return 0;
 785
 786 unwind_grp:
 787         flags |= XFS_QMOPT_FORCE_RES;
 788         if (gdqp)
 789                 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
 790 unwind_usr:
 791         flags |= XFS_QMOPT_FORCE_RES;
 792         if (udqp)
 793                 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
 794         return error;
 795 }
 796
 797
 798 /*
 799  * Lock the dquot and change the reservation if we can.
 800  * This doesn't change the actual usage, just the reservation.
 801  * The inode sent in is locked.
 802  */
 803 int
 804 xfs_trans_reserve_quota_nblks(
 805         struct xfs_trans        *tp,
 806         struct xfs_inode        *ip,
 807         long                    nblks,
 808         long                    ninos,
 809         uint                    flags)
 810 {
 811         struct xfs_mount        *mp = ip->i_mount;
 812
 813         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 814                 return 0;
 815         if (XFS_IS_PQUOTA_ON(mp))
 816                 flags |= XFS_QMOPT_ENOSPC;
 817
 818         ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
 819
 820         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 821         ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 822                                 XFS_TRANS_DQ_RES_RTBLKS ||
 823                (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 824                                 XFS_TRANS_DQ_RES_BLKS);
 825
 826         /*
 827          * Reserve nblks against these dquots, with trans as the mediator.
 828          */
 829         return xfs_trans_reserve_quota_bydquots(tp, mp,
 830                                                 ip->i_udquot, ip->i_gdquot,
 831                                                 ip->i_pdquot,
 832                                                 nblks, ninos, flags);
 833 }
 834
 835 /*
 836  * This routine is called to allocate a quotaoff log item.
 837  */
 838 xfs_qoff_logitem_t *
 839 xfs_trans_get_qoff_item(
 840         xfs_trans_t             *tp,
 841         xfs_qoff_logitem_t      *startqoff,
 842         uint                    flags)
 843 {
 844         xfs_qoff_logitem_t      *q;
 845
 846         ASSERT(tp != NULL);
 847
 848         q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
 849         ASSERT(q != NULL);
 850
 851         /*
 852          * Get a log_item_desc to point at the new item.
 853          */
 854         xfs_trans_add_item(tp, &q->qql_item);
 855         return q;
 856 }
 857
 858
 859 /*
 860  * This is called to mark the quotaoff logitem as needing
 861  * to be logged when the transaction is committed.  The logitem must
 862  * already be associated with the given transaction.
 863  */
 864 void
 865 xfs_trans_log_quotaoff_item(
 866         xfs_trans_t             *tp,
 867         xfs_qoff_logitem_t      *qlp)
 868 {
 869         tp->t_flags |= XFS_TRANS_DIRTY;
 870         set_bit(XFS_LI_DIRTY, &qlp->qql_item.li_flags);
 871 }
 872
 873 STATIC void
 874 xfs_trans_alloc_dqinfo(
 875         xfs_trans_t     *tp)
 876 {
 877         tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
 878 }
 879
 880 void
 881 xfs_trans_free_dqinfo(
 882         xfs_trans_t     *tp)
 883 {
 884         if (!tp->t_dqinfo)
 885                 return;
 886         kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
 887         tp->t_dqinfo = NULL;
 888 }