kernel/fs/xfs/xfs_trans_dquot.c

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