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_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_mount.h"
  27 #include "xfs_inode.h"
  28 #include "xfs_error.h"
  29 #include "xfs_trans.h"
  30 #include "xfs_trans_priv.h"
  31 #include "xfs_quota.h"
  32 #include "xfs_qm.h"
  33
  34 STATIC void     xfs_trans_alloc_dqinfo(xfs_trans_t *);
  35
  36 /*
  37  * Add the locked dquot to the transaction.
  38  * The dquot must be locked, and it cannot be associated with any
  39  * transaction.
  40  */
  41 void
  42 xfs_trans_dqjoin(
  43         xfs_trans_t     *tp,
  44         xfs_dquot_t     *dqp)
  45 {
  46         ASSERT(dqp->q_transp != tp);
  47         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  48         ASSERT(dqp->q_logitem.qli_dquot == dqp);
  49
  50         /*
  51          * Get a log_item_desc to point at the new item.
  52          */
  53         xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
  54
  55         /*
  56          * Initialize d_transp so we can later determine if this dquot is
  57          * associated with this transaction.
  58          */
  59         dqp->q_transp = tp;
  60 }
  61
  62
  63 /*
  64  * This is called to mark the dquot as needing
  65  * to be logged when the transaction is committed.  The dquot must
  66  * already be associated with the given transaction.
  67  * Note that it marks the entire transaction as dirty. In the ordinary
  68  * case, this gets called via xfs_trans_commit, after the transaction
  69  * is already dirty. However, there's nothing stop this from getting
  70  * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
  71  * flag.
  72  */
  73 void
  74 xfs_trans_log_dquot(
  75         xfs_trans_t     *tp,
  76         xfs_dquot_t     *dqp)
  77 {
  78         ASSERT(dqp->q_transp == tp);
  79         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  80
  81         tp->t_flags |= XFS_TRANS_DIRTY;
  82         dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
  83 }
  84
  85 /*
  86  * Carry forward whatever is left of the quota blk reservation to
  87  * the spanky new transaction
  88  */
  89 void
  90 xfs_trans_dup_dqinfo(
  91         xfs_trans_t     *otp,
  92         xfs_trans_t     *ntp)
  93 {
  94         xfs_dqtrx_t     *oq, *nq;
  95         int             i,j;
  96         xfs_dqtrx_t     *oqa, *nqa;
  97
  98         if (!otp->t_dqinfo)
  99                 return;
 100
 101         xfs_trans_alloc_dqinfo(ntp);
 102
 103         /*
 104          * Because the quota blk reservation is carried forward,
 105          * it is also necessary to carry forward the DQ_DIRTY flag.
 106          */
 107         if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
 108                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
 109
 110         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 111                 oqa = otp->t_dqinfo->dqs[j];
 112                 nqa = ntp->t_dqinfo->dqs[j];
 113                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 114                         if (oqa[i].qt_dquot == NULL)
 115                                 break;
 116                         oq = &oqa[i];
 117                         nq = &nqa[i];
 118
 119                         nq->qt_dquot = oq->qt_dquot;
 120                         nq->qt_bcount_delta = nq->qt_icount_delta = 0;
 121                         nq->qt_rtbcount_delta = 0;
 122
 123                         /*
 124                          * Transfer whatever is left of the reservations.
 125                          */
 126                         nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
 127                         oq->qt_blk_res = oq->qt_blk_res_used;
 128
 129                         nq->qt_rtblk_res = oq->qt_rtblk_res -
 130                                 oq->qt_rtblk_res_used;
 131                         oq->qt_rtblk_res = oq->qt_rtblk_res_used;
 132
 133                         nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
 134                         oq->qt_ino_res = oq->qt_ino_res_used;
 135
 136                 }
 137         }
 138 }
 139
 140 /*
 141  * Wrap around mod_dquot to account for both user and group quotas.
 142  */
 143 void
 144 xfs_trans_mod_dquot_byino(
 145         xfs_trans_t     *tp,
 146         xfs_inode_t     *ip,
 147         uint            field,
 148         long            delta)
 149 {
 150         xfs_mount_t     *mp = tp->t_mountp;
 151
 152         if (!XFS_IS_QUOTA_RUNNING(mp) ||
 153             !XFS_IS_QUOTA_ON(mp) ||
 154             xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
 155                 return;
 156
 157         if (tp->t_dqinfo == NULL)
 158                 xfs_trans_alloc_dqinfo(tp);
 159
 160         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
 161                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
 162         if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
 163                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
 164         if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
 165                 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
 166 }
 167
 168 STATIC struct xfs_dqtrx *
 169 xfs_trans_get_dqtrx(
 170         struct xfs_trans        *tp,
 171         struct xfs_dquot        *dqp)
 172 {
 173         int                     i;
 174         struct xfs_dqtrx        *qa;
 175
 176         if (XFS_QM_ISUDQ(dqp))
 177                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
 178         else if (XFS_QM_ISGDQ(dqp))
 179                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
 180         else if (XFS_QM_ISPDQ(dqp))
 181                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
 182         else
 183                 return NULL;
 184
 185         for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 186                 if (qa[i].qt_dquot == NULL ||
 187                     qa[i].qt_dquot == dqp)
 188                         return &qa[i];
 189         }
 190
 191         return NULL;
 192 }
 193
 194 /*
 195  * Make the changes in the transaction structure.
 196  * The moral equivalent to xfs_trans_mod_sb().
 197  * We don't touch any fields in the dquot, so we don't care
 198  * if it's locked or not (most of the time it won't be).
 199  */
 200 void
 201 xfs_trans_mod_dquot(
 202         xfs_trans_t     *tp,
 203         xfs_dquot_t     *dqp,
 204         uint            field,
 205         long            delta)
 206 {
 207         xfs_dqtrx_t     *qtrx;
 208
 209         ASSERT(tp);
 210         ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
 211         qtrx = NULL;
 212
 213         if (tp->t_dqinfo == NULL)
 214                 xfs_trans_alloc_dqinfo(tp);
 215         /*
 216          * Find either the first free slot or the slot that belongs
 217          * to this dquot.
 218          */
 219         qtrx = xfs_trans_get_dqtrx(tp, dqp);
 220         ASSERT(qtrx);
 221         if (qtrx->qt_dquot == NULL)
 222                 qtrx->qt_dquot = dqp;
 223
 224         switch (field) {
 225
 226                 /*
 227                  * regular disk blk reservation
 228                  */
 229               case XFS_TRANS_DQ_RES_BLKS:
 230                 qtrx->qt_blk_res += (ulong)delta;
 231                 break;
 232
 233                 /*
 234                  * inode reservation
 235                  */
 236               case XFS_TRANS_DQ_RES_INOS:
 237                 qtrx->qt_ino_res += (ulong)delta;
 238                 break;
 239
 240                 /*
 241                  * disk blocks used.
 242                  */
 243               case XFS_TRANS_DQ_BCOUNT:
 244                 if (qtrx->qt_blk_res && delta > 0) {
 245                         qtrx->qt_blk_res_used += (ulong)delta;
 246                         ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
 247                 }
 248                 qtrx->qt_bcount_delta += delta;
 249                 break;
 250
 251               case XFS_TRANS_DQ_DELBCOUNT:
 252                 qtrx->qt_delbcnt_delta += delta;
 253                 break;
 254
 255                 /*
 256                  * Inode Count
 257                  */
 258               case XFS_TRANS_DQ_ICOUNT:
 259                 if (qtrx->qt_ino_res && delta > 0) {
 260                         qtrx->qt_ino_res_used += (ulong)delta;
 261                         ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
 262                 }
 263                 qtrx->qt_icount_delta += delta;
 264                 break;
 265
 266                 /*
 267                  * rtblk reservation
 268                  */
 269               case XFS_TRANS_DQ_RES_RTBLKS:
 270                 qtrx->qt_rtblk_res += (ulong)delta;
 271                 break;
 272
 273                 /*
 274                  * rtblk count
 275                  */
 276               case XFS_TRANS_DQ_RTBCOUNT:
 277                 if (qtrx->qt_rtblk_res && delta > 0) {
 278                         qtrx->qt_rtblk_res_used += (ulong)delta;
 279                         ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
 280                 }
 281                 qtrx->qt_rtbcount_delta += delta;
 282                 break;
 283
 284               case XFS_TRANS_DQ_DELRTBCOUNT:
 285                 qtrx->qt_delrtb_delta += delta;
 286                 break;
 287
 288               default:
 289                 ASSERT(0);
 290         }
 291         tp->t_flags |= XFS_TRANS_DQ_DIRTY;
 292 }
 293
 294
 295 /*
 296  * Given an array of dqtrx structures, lock all the dquots associated and join
 297  * them to the transaction, provided they have been modified.  We know that the
 298  * highest number of dquots of one type - usr, grp OR prj - involved in a
 299  * transaction is 2 so we don't need to make this very generic.
 300  */
 301 STATIC void
 302 xfs_trans_dqlockedjoin(
 303         xfs_trans_t     *tp,
 304         xfs_dqtrx_t     *q)
 305 {
 306         ASSERT(q[0].qt_dquot != NULL);
 307         if (q[1].qt_dquot == NULL) {
 308                 xfs_dqlock(q[0].qt_dquot);
 309                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 310         } else {
 311                 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
 312                 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
 313                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 314                 xfs_trans_dqjoin(tp, q[1].qt_dquot);
 315         }
 316 }
 317
 318
 319 /*
 320  * Called by xfs_trans_commit() and similar in spirit to
 321  * xfs_trans_apply_sb_deltas().
 322  * Go thru all the dquots belonging to this transaction and modify the
 323  * INCORE dquot to reflect the actual usages.
 324  * Unreserve just the reservations done by this transaction.
 325  * dquot is still left locked at exit.
 326  */
 327 void
 328 xfs_trans_apply_dquot_deltas(
 329         struct xfs_trans        *tp)
 330 {
 331         int                     i, j;
 332         struct xfs_dquot        *dqp;
 333         struct xfs_dqtrx        *qtrx, *qa;
 334         struct xfs_disk_dquot   *d;
 335         long                    totalbdelta;
 336         long                    totalrtbdelta;
 337
 338         if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 339                 return;
 340
 341         ASSERT(tp->t_dqinfo);
 342         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 343                 qa = tp->t_dqinfo->dqs[j];
 344                 if (qa[0].qt_dquot == NULL)
 345                         continue;
 346
 347                 /*
 348                  * Lock all of the dquots and join them to the transaction.
 349                  */
 350                 xfs_trans_dqlockedjoin(tp, qa);
 351
 352                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 353                         qtrx = &qa[i];
 354                         /*
 355                          * The array of dquots is filled
 356                          * sequentially, not sparsely.
 357                          */
 358                         if ((dqp = qtrx->qt_dquot) == NULL)
 359                                 break;
 360
 361                         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 362                         ASSERT(dqp->q_transp == tp);
 363
 364                         /*
 365                          * adjust the actual number of blocks used
 366                          */
 367                         d = &dqp->q_core;
 368
 369                         /*
 370                          * The issue here is - sometimes we don't make a blkquota
 371                          * reservation intentionally to be fair to users
 372                          * (when the amount is small). On the other hand,
 373                          * delayed allocs do make reservations, but that's
 374                          * outside of a transaction, so we have no
 375                          * idea how much was really reserved.
 376                          * So, here we've accumulated delayed allocation blks and
 377                          * non-delay blks. The assumption is that the
 378                          * delayed ones are always reserved (outside of a
 379                          * transaction), and the others may or may not have
 380                          * quota reservations.
 381                          */
 382                         totalbdelta = qtrx->qt_bcount_delta +
 383                                 qtrx->qt_delbcnt_delta;
 384                         totalrtbdelta = qtrx->qt_rtbcount_delta +
 385                                 qtrx->qt_delrtb_delta;
 386 #ifdef DEBUG
 387                         if (totalbdelta < 0)
 388                                 ASSERT(be64_to_cpu(d->d_bcount) >=
 389                                        -totalbdelta);
 390
 391                         if (totalrtbdelta < 0)
 392                                 ASSERT(be64_to_cpu(d->d_rtbcount) >=
 393                                        -totalrtbdelta);
 394
 395                         if (qtrx->qt_icount_delta < 0)
 396                                 ASSERT(be64_to_cpu(d->d_icount) >=
 397                                        -qtrx->qt_icount_delta);
 398 #endif
 399                         if (totalbdelta)
 400                                 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
 401
 402                         if (qtrx->qt_icount_delta)
 403                                 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
 404
 405                         if (totalrtbdelta)
 406                                 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
 407
 408                         /*
 409                          * Get any default limits in use.
 410                          * Start/reset the timer(s) if needed.
 411                          */
 412                         if (d->d_id) {
 413                                 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
 414                                 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
 415                         }
 416
 417                         dqp->dq_flags |= XFS_DQ_DIRTY;
 418                         /*
 419                          * add this to the list of items to get logged
 420                          */
 421                         xfs_trans_log_dquot(tp, dqp);
 422                         /*
 423                          * Take off what's left of the original reservation.
 424                          * In case of delayed allocations, there's no
 425                          * reservation that a transaction structure knows of.
 426                          */
 427                         if (qtrx->qt_blk_res != 0) {
 428                                 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
 429                                         if (qtrx->qt_blk_res >
 430                                             qtrx->qt_blk_res_used)
 431                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 432                                                         (qtrx->qt_blk_res -
 433                                                          qtrx->qt_blk_res_used);
 434                                         else
 435                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 436                                                         (qtrx->qt_blk_res_used -
 437                                                          qtrx->qt_blk_res);
 438                                 }
 439                         } else {
 440                                 /*
 441                                  * These blks were never reserved, either inside
 442                                  * a transaction or outside one (in a delayed
 443                                  * allocation). Also, this isn't always a
 444                                  * negative number since we sometimes
 445                                  * deliberately skip quota reservations.
 446                                  */
 447                                 if (qtrx->qt_bcount_delta) {
 448                                         dqp->q_res_bcount +=
 449                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
 450                                 }
 451                         }
 452                         /*
 453                          * Adjust the RT reservation.
 454                          */
 455                         if (qtrx->qt_rtblk_res != 0) {
 456                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
 457                                         if (qtrx->qt_rtblk_res >
 458                                             qtrx->qt_rtblk_res_used)
 459                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 460                                                        (qtrx->qt_rtblk_res -
 461                                                         qtrx->qt_rtblk_res_used);
 462                                         else
 463                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 464                                                        (qtrx->qt_rtblk_res_used -
 465                                                         qtrx->qt_rtblk_res);
 466                                 }
 467                         } else {
 468                                 if (qtrx->qt_rtbcount_delta)
 469                                         dqp->q_res_rtbcount +=
 470                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
 471                         }
 472
 473                         /*
 474                          * Adjust the inode reservation.
 475                          */
 476                         if (qtrx->qt_ino_res != 0) {
 477                                 ASSERT(qtrx->qt_ino_res >=
 478                                        qtrx->qt_ino_res_used);
 479                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
 480                                         dqp->q_res_icount -= (xfs_qcnt_t)
 481                                                 (qtrx->qt_ino_res -
 482                                                  qtrx->qt_ino_res_used);
 483                         } else {
 484                                 if (qtrx->qt_icount_delta)
 485                                         dqp->q_res_icount +=
 486                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
 487                         }
 488
 489                         ASSERT(dqp->q_res_bcount >=
 490                                 be64_to_cpu(dqp->q_core.d_bcount));
 491                         ASSERT(dqp->q_res_icount >=
 492                                 be64_to_cpu(dqp->q_core.d_icount));
 493                         ASSERT(dqp->q_res_rtbcount >=
 494                                 be64_to_cpu(dqp->q_core.d_rtbcount));
 495                 }
 496         }
 497 }
 498
 499 /*
 500  * Release the reservations, and adjust the dquots accordingly.
 501  * This is called only when the transaction is being aborted. If by
 502  * any chance we have done dquot modifications incore (ie. deltas) already,
 503  * we simply throw those away, since that's the expected behavior
 504  * when a transaction is curtailed without a commit.
 505  */
 506 void
 507 xfs_trans_unreserve_and_mod_dquots(
 508         xfs_trans_t             *tp)
 509 {
 510         int                     i, j;
 511         xfs_dquot_t             *dqp;
 512         xfs_dqtrx_t             *qtrx, *qa;
 513         bool                    locked;
 514
 515         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 516                 return;
 517
 518         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 519                 qa = tp->t_dqinfo->dqs[j];
 520
 521                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 522                         qtrx = &qa[i];
 523                         /*
 524                          * We assume that the array of dquots is filled
 525                          * sequentially, not sparsely.
 526                          */
 527                         if ((dqp = qtrx->qt_dquot) == NULL)
 528                                 break;
 529                         /*
 530                          * Unreserve the original reservation. We don't care
 531                          * about the number of blocks used field, or deltas.
 532                          * Also we don't bother to zero the fields.
 533                          */
 534                         locked = false;
 535                         if (qtrx->qt_blk_res) {
 536                                 xfs_dqlock(dqp);
 537                                 locked = true;
 538                                 dqp->q_res_bcount -=
 539                                         (xfs_qcnt_t)qtrx->qt_blk_res;
 540                         }
 541                         if (qtrx->qt_ino_res) {
 542                                 if (!locked) {
 543                                         xfs_dqlock(dqp);
 544                                         locked = true;
 545                                 }
 546                                 dqp->q_res_icount -=
 547                                         (xfs_qcnt_t)qtrx->qt_ino_res;
 548                         }
 549
 550                         if (qtrx->qt_rtblk_res) {
 551                                 if (!locked) {
 552                                         xfs_dqlock(dqp);
 553                                         locked = true;
 554                                 }
 555                                 dqp->q_res_rtbcount -=
 556                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
 557                         }
 558                         if (locked)
 559                                 xfs_dqunlock(dqp);
 560
 561                 }
 562         }
 563 }
 564
 565 STATIC void
 566 xfs_quota_warn(
 567         struct xfs_mount        *mp,
 568         struct xfs_dquot        *dqp,
 569         int                     type)
 570 {
 571         /* no warnings for project quotas - we just return ENOSPC later */
 572         if (dqp->dq_flags & XFS_DQ_PROJ)
 573                 return;
 574         quota_send_warning(make_kqid(&init_user_ns,
 575                                      (dqp->dq_flags & XFS_DQ_USER) ?
 576                                      USRQUOTA : GRPQUOTA,
 577                                      be32_to_cpu(dqp->q_core.d_id)),
 578                            mp->m_super->s_dev, type);
 579 }
 580
 581 /*
 582  * This reserves disk blocks and inodes against a dquot.
 583  * Flags indicate if the dquot is to be locked here and also
 584  * if the blk reservation is for RT or regular blocks.
 585  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
 586  */
 587 STATIC int
 588 xfs_trans_dqresv(
 589         xfs_trans_t     *tp,
 590         xfs_mount_t     *mp,
 591         xfs_dquot_t     *dqp,
 592         long            nblks,
 593         long            ninos,
 594         uint            flags)
 595 {
 596         xfs_qcnt_t      hardlimit;
 597         xfs_qcnt_t      softlimit;
 598         time_t          timer;
 599         xfs_qwarncnt_t  warns;
 600         xfs_qwarncnt_t  warnlimit;
 601         xfs_qcnt_t      total_count;
 602         xfs_qcnt_t      *resbcountp;
 603         xfs_quotainfo_t *q = mp->m_quotainfo;
 604
 605
 606         xfs_dqlock(dqp);
 607
 608         if (flags & XFS_TRANS_DQ_RES_BLKS) {
 609                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
 610                 if (!hardlimit)
 611                         hardlimit = q->qi_bhardlimit;
 612                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
 613                 if (!softlimit)
 614                         softlimit = q->qi_bsoftlimit;
 615                 timer = be32_to_cpu(dqp->q_core.d_btimer);
 616                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
 617                 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
 618                 resbcountp = &dqp->q_res_bcount;
 619         } else {
 620                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
 621                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
 622                 if (!hardlimit)
 623                         hardlimit = q->qi_rtbhardlimit;
 624                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
 625                 if (!softlimit)
 626                         softlimit = q->qi_rtbsoftlimit;
 627                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
 628                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
 629                 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
 630                 resbcountp = &dqp->q_res_rtbcount;
 631         }
 632
 633         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
 634             dqp->q_core.d_id &&
 635             ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
 636              (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
 637              (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
 638                 if (nblks > 0) {
 639                         /*
 640                          * dquot is locked already. See if we'd go over the
 641                          * hardlimit or exceed the timelimit if we allocate
 642                          * nblks.
 643                          */
 644                         total_count = *resbcountp + nblks;
 645                         if (hardlimit && total_count > hardlimit) {
 646                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
 647                                 goto error_return;
 648                         }
 649                         if (softlimit && total_count > softlimit) {
 650                                 if ((timer != 0 && get_seconds() > timer) ||
 651                                     (warns != 0 && warns >= warnlimit)) {
 652                                         xfs_quota_warn(mp, dqp,
 653                                                        QUOTA_NL_BSOFTLONGWARN);
 654                                         goto error_return;
 655                                 }
 656
 657                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
 658                         }
 659                 }
 660                 if (ninos > 0) {
 661                         total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
 662                         timer = be32_to_cpu(dqp->q_core.d_itimer);
 663                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
 664                         warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
 665                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
 666                         if (!hardlimit)
 667                                 hardlimit = q->qi_ihardlimit;
 668                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
 669                         if (!softlimit)
 670                                 softlimit = q->qi_isoftlimit;
 671
 672                         if (hardlimit && total_count > hardlimit) {
 673                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
 674                                 goto error_return;
 675                         }
 676                         if (softlimit && total_count > softlimit) {
 677                                 if  ((timer != 0 && get_seconds() > timer) ||
 678                                      (warns != 0 && warns >= warnlimit)) {
 679                                         xfs_quota_warn(mp, dqp,
 680                                                        QUOTA_NL_ISOFTLONGWARN);
 681                                         goto error_return;
 682                                 }
 683                                 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
 684                         }
 685                 }
 686         }
 687
 688         /*
 689          * Change the reservation, but not the actual usage.
 690          * Note that q_res_bcount = q_core.d_bcount + resv
 691          */
 692         (*resbcountp) += (xfs_qcnt_t)nblks;
 693         if (ninos != 0)
 694                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
 695
 696         /*
 697          * note the reservation amt in the trans struct too,
 698          * so that the transaction knows how much was reserved by
 699          * it against this particular dquot.
 700          * We don't do this when we are reserving for a delayed allocation,
 701          * because we don't have the luxury of a transaction envelope then.
 702          */
 703         if (tp) {
 704                 ASSERT(tp->t_dqinfo);
 705                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 706                 if (nblks != 0)
 707                         xfs_trans_mod_dquot(tp, dqp,
 708                                             flags & XFS_QMOPT_RESBLK_MASK,
 709                                             nblks);
 710                 if (ninos != 0)
 711                         xfs_trans_mod_dquot(tp, dqp,
 712                                             XFS_TRANS_DQ_RES_INOS,
 713                                             ninos);
 714         }
 715         ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
 716         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
 717         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
 718
 719         xfs_dqunlock(dqp);
 720         return 0;
 721
 722 error_return:
 723         xfs_dqunlock(dqp);
 724         if (flags & XFS_QMOPT_ENOSPC)
 725                 return ENOSPC;
 726         return EDQUOT;
 727 }
 728
 729
 730 /*
 731  * Given dquot(s), make disk block and/or inode reservations against them.
 732  * The fact that this does the reservation against user, group and
 733  * project quotas is important, because this follows a all-or-nothing
 734  * approach.
 735  *
 736  * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
 737  *         XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT.  Used by pquota.
 738  *         XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
 739  *         XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
 740  * dquots are unlocked on return, if they were not locked by caller.
 741  */
 742 int
 743 xfs_trans_reserve_quota_bydquots(
 744         struct xfs_trans        *tp,
 745         struct xfs_mount        *mp,
 746         struct xfs_dquot        *udqp,
 747         struct xfs_dquot        *gdqp,
 748         struct xfs_dquot        *pdqp,
 749         long                    nblks,
 750         long                    ninos,
 751         uint                    flags)
 752 {
 753         int             error;
 754
 755         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 756                 return 0;
 757
 758         if (tp && tp->t_dqinfo == NULL)
 759                 xfs_trans_alloc_dqinfo(tp);
 760
 761         ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 762
 763         if (udqp) {
 764                 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
 765                                         (flags & ~XFS_QMOPT_ENOSPC));
 766                 if (error)
 767                         return error;
 768         }
 769
 770         if (gdqp) {
 771                 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
 772                 if (error)
 773                         goto unwind_usr;
 774         }
 775
 776         if (pdqp) {
 777                 error = xfs_trans_dqresv(tp, mp, pdqp, nblks, ninos, flags);
 778                 if (error)
 779                         goto unwind_grp;
 780         }
 781
 782         /*
 783          * Didn't change anything critical, so, no need to log
 784          */
 785         return 0;
 786
 787 unwind_grp:
 788         flags |= XFS_QMOPT_FORCE_RES;
 789         if (gdqp)
 790                 xfs_trans_dqresv(tp, mp, gdqp, -nblks, -ninos, flags);
 791 unwind_usr:
 792         flags |= XFS_QMOPT_FORCE_RES;
 793         if (udqp)
 794                 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
 795         return error;
 796 }
 797
 798
 799 /*
 800  * Lock the dquot and change the reservation if we can.
 801  * This doesn't change the actual usage, just the reservation.
 802  * The inode sent in is locked.
 803  */
 804 int
 805 xfs_trans_reserve_quota_nblks(
 806         struct xfs_trans        *tp,
 807         struct xfs_inode        *ip,
 808         long                    nblks,
 809         long                    ninos,
 810         uint                    flags)
 811 {
 812         struct xfs_mount        *mp = ip->i_mount;
 813
 814         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 815                 return 0;
 816         if (XFS_IS_PQUOTA_ON(mp))
 817                 flags |= XFS_QMOPT_ENOSPC;
 818
 819         ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
 820
 821         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 822         ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 823                                 XFS_TRANS_DQ_RES_RTBLKS ||
 824                (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 825                                 XFS_TRANS_DQ_RES_BLKS);
 826
 827         /*
 828          * Reserve nblks against these dquots, with trans as the mediator.
 829          */
 830         return xfs_trans_reserve_quota_bydquots(tp, mp,
 831                                                 ip->i_udquot, ip->i_gdquot,
 832                                                 ip->i_pdquot,
 833                                                 nblks, ninos, flags);
 834 }
 835
 836 /*
 837  * This routine is called to allocate a quotaoff log item.
 838  */
 839 xfs_qoff_logitem_t *
 840 xfs_trans_get_qoff_item(
 841         xfs_trans_t             *tp,
 842         xfs_qoff_logitem_t      *startqoff,
 843         uint                    flags)
 844 {
 845         xfs_qoff_logitem_t      *q;
 846
 847         ASSERT(tp != NULL);
 848
 849         q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
 850         ASSERT(q != NULL);
 851
 852         /*
 853          * Get a log_item_desc to point at the new item.
 854          */
 855         xfs_trans_add_item(tp, &q->qql_item);
 856         return q;
 857 }
 858
 859
 860 /*
 861  * This is called to mark the quotaoff logitem as needing
 862  * to be logged when the transaction is committed.  The logitem must
 863  * already be associated with the given transaction.
 864  */
 865 void
 866 xfs_trans_log_quotaoff_item(
 867         xfs_trans_t             *tp,
 868         xfs_qoff_logitem_t      *qlp)
 869 {
 870         tp->t_flags |= XFS_TRANS_DIRTY;
 871         qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 872 }
 873
 874 STATIC void
 875 xfs_trans_alloc_dqinfo(
 876         xfs_trans_t     *tp)
 877 {
 878         tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
 879 }
 880
 881 void
 882 xfs_trans_free_dqinfo(
 883         xfs_trans_t     *tp)
 884 {
 885         if (!tp->t_dqinfo)
 886                 return;
 887         kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
 888         tp->t_dqinfo = NULL;
 889 }