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_trans.h"
  15 #include "xfs_trans_priv.h"
  16 #include "xfs_quota.h"
  17 #include "xfs_qm.h"
  18 #include "xfs_error.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         struct xfs_trans        *tp,
  30         struct xfs_dquot        *dqp)
  31 {
  32         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  33         ASSERT(dqp->q_logitem.qli_dquot == dqp);
  34
  35         /*
  36          * Get a log_item_desc to point at the new item.
  37          */
  38         xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
  39 }
  40
  41 /*
  42  * This is called to mark the dquot as needing
  43  * to be logged when the transaction is committed.  The dquot must
  44  * already be associated with the given transaction.
  45  * Note that it marks the entire transaction as dirty. In the ordinary
  46  * case, this gets called via xfs_trans_commit, after the transaction
  47  * is already dirty. However, there's nothing stop this from getting
  48  * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
  49  * flag.
  50  */
  51 void
  52 xfs_trans_log_dquot(
  53         struct xfs_trans        *tp,
  54         struct xfs_dquot        *dqp)
  55 {
  56         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  57
  58         tp->t_flags |= XFS_TRANS_DIRTY;
  59         set_bit(XFS_LI_DIRTY, &dqp->q_logitem.qli_item.li_flags);
  60 }
  61
  62 /*
  63  * Carry forward whatever is left of the quota blk reservation to
  64  * the spanky new transaction
  65  */
  66 void
  67 xfs_trans_dup_dqinfo(
  68         struct xfs_trans        *otp,
  69         struct xfs_trans        *ntp)
  70 {
  71         struct xfs_dqtrx        *oq, *nq;
  72         int                     i, j;
  73         struct xfs_dqtrx        *oqa, *nqa;
  74         uint64_t                blk_res_used;
  75
  76         if (!otp->t_dqinfo)
  77                 return;
  78
  79         xfs_trans_alloc_dqinfo(ntp);
  80
  81         /*
  82          * Because the quota blk reservation is carried forward,
  83          * it is also necessary to carry forward the DQ_DIRTY flag.
  84          */
  85         if (otp->t_flags & XFS_TRANS_DQ_DIRTY)
  86                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
  87
  88         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
  89                 oqa = otp->t_dqinfo->dqs[j];
  90                 nqa = ntp->t_dqinfo->dqs[j];
  91                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
  92                         blk_res_used = 0;
  93
  94                         if (oqa[i].qt_dquot == NULL)
  95                                 break;
  96                         oq = &oqa[i];
  97                         nq = &nqa[i];
  98
  99                         if (oq->qt_blk_res && oq->qt_bcount_delta > 0)
 100                                 blk_res_used = oq->qt_bcount_delta;
 101
 102                         nq->qt_dquot = oq->qt_dquot;
 103                         nq->qt_bcount_delta = nq->qt_icount_delta = 0;
 104                         nq->qt_rtbcount_delta = 0;
 105
 106                         /*
 107                          * Transfer whatever is left of the reservations.
 108                          */
 109                         nq->qt_blk_res = oq->qt_blk_res - blk_res_used;
 110                         oq->qt_blk_res = blk_res_used;
 111
 112                         nq->qt_rtblk_res = oq->qt_rtblk_res -
 113                                 oq->qt_rtblk_res_used;
 114                         oq->qt_rtblk_res = oq->qt_rtblk_res_used;
 115
 116                         nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
 117                         oq->qt_ino_res = oq->qt_ino_res_used;
 118
 119                 }
 120         }
 121 }
 122
 123 /*
 124  * Wrap around mod_dquot to account for both user and group quotas.
 125  */
 126 void
 127 xfs_trans_mod_dquot_byino(
 128         xfs_trans_t     *tp,
 129         xfs_inode_t     *ip,
 130         uint            field,
 131         int64_t         delta)
 132 {
 133         xfs_mount_t     *mp = tp->t_mountp;
 134
 135         if (!XFS_IS_QUOTA_RUNNING(mp) ||
 136             !XFS_IS_QUOTA_ON(mp) ||
 137             xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
 138                 return;
 139
 140         if (tp->t_dqinfo == NULL)
 141                 xfs_trans_alloc_dqinfo(tp);
 142
 143         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
 144                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
 145         if (XFS_IS_GQUOTA_ON(mp) && ip->i_gdquot)
 146                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
 147         if (XFS_IS_PQUOTA_ON(mp) && ip->i_pdquot)
 148                 (void) xfs_trans_mod_dquot(tp, ip->i_pdquot, field, delta);
 149 }
 150
 151 STATIC struct xfs_dqtrx *
 152 xfs_trans_get_dqtrx(
 153         struct xfs_trans        *tp,
 154         struct xfs_dquot        *dqp)
 155 {
 156         int                     i;
 157         struct xfs_dqtrx        *qa;
 158
 159         if (XFS_QM_ISUDQ(dqp))
 160                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
 161         else if (XFS_QM_ISGDQ(dqp))
 162                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
 163         else if (XFS_QM_ISPDQ(dqp))
 164                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_PRJ];
 165         else
 166                 return NULL;
 167
 168         for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 169                 if (qa[i].qt_dquot == NULL ||
 170                     qa[i].qt_dquot == dqp)
 171                         return &qa[i];
 172         }
 173
 174         return NULL;
 175 }
 176
 177 /*
 178  * Make the changes in the transaction structure.
 179  * The moral equivalent to xfs_trans_mod_sb().
 180  * We don't touch any fields in the dquot, so we don't care
 181  * if it's locked or not (most of the time it won't be).
 182  */
 183 void
 184 xfs_trans_mod_dquot(
 185         struct xfs_trans        *tp,
 186         struct xfs_dquot        *dqp,
 187         uint                    field,
 188         int64_t                 delta)
 189 {
 190         struct xfs_dqtrx        *qtrx;
 191
 192         ASSERT(tp);
 193         ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
 194         qtrx = NULL;
 195
 196         if (tp->t_dqinfo == NULL)
 197                 xfs_trans_alloc_dqinfo(tp);
 198         /*
 199          * Find either the first free slot or the slot that belongs
 200          * to this dquot.
 201          */
 202         qtrx = xfs_trans_get_dqtrx(tp, dqp);
 203         ASSERT(qtrx);
 204         if (qtrx->qt_dquot == NULL)
 205                 qtrx->qt_dquot = dqp;
 206
 207         switch (field) {
 208
 209                 /*
 210                  * regular disk blk reservation
 211                  */
 212               case XFS_TRANS_DQ_RES_BLKS:
 213                 qtrx->qt_blk_res += delta;
 214                 break;
 215
 216                 /*
 217                  * inode reservation
 218                  */
 219               case XFS_TRANS_DQ_RES_INOS:
 220                 qtrx->qt_ino_res += delta;
 221                 break;
 222
 223                 /*
 224                  * disk blocks used.
 225                  */
 226               case XFS_TRANS_DQ_BCOUNT:
 227                 qtrx->qt_bcount_delta += delta;
 228                 break;
 229
 230               case XFS_TRANS_DQ_DELBCOUNT:
 231                 qtrx->qt_delbcnt_delta += delta;
 232                 break;
 233
 234                 /*
 235                  * Inode Count
 236                  */
 237               case XFS_TRANS_DQ_ICOUNT:
 238                 if (qtrx->qt_ino_res && delta > 0) {
 239                         qtrx->qt_ino_res_used += delta;
 240                         ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
 241                 }
 242                 qtrx->qt_icount_delta += delta;
 243                 break;
 244
 245                 /*
 246                  * rtblk reservation
 247                  */
 248               case XFS_TRANS_DQ_RES_RTBLKS:
 249                 qtrx->qt_rtblk_res += delta;
 250                 break;
 251
 252                 /*
 253                  * rtblk count
 254                  */
 255               case XFS_TRANS_DQ_RTBCOUNT:
 256                 if (qtrx->qt_rtblk_res && delta > 0) {
 257                         qtrx->qt_rtblk_res_used += delta;
 258                         ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
 259                 }
 260                 qtrx->qt_rtbcount_delta += delta;
 261                 break;
 262
 263               case XFS_TRANS_DQ_DELRTBCOUNT:
 264                 qtrx->qt_delrtb_delta += delta;
 265                 break;
 266
 267               default:
 268                 ASSERT(0);
 269         }
 270         tp->t_flags |= XFS_TRANS_DQ_DIRTY;
 271 }
 272
 273
 274 /*
 275  * Given an array of dqtrx structures, lock all the dquots associated and join
 276  * them to the transaction, provided they have been modified.  We know that the
 277  * highest number of dquots of one type - usr, grp and prj - involved in a
 278  * transaction is 3 so we don't need to make this very generic.
 279  */
 280 STATIC void
 281 xfs_trans_dqlockedjoin(
 282         struct xfs_trans        *tp,
 283         struct xfs_dqtrx        *q)
 284 {
 285         ASSERT(q[0].qt_dquot != NULL);
 286         if (q[1].qt_dquot == NULL) {
 287                 xfs_dqlock(q[0].qt_dquot);
 288                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 289         } else {
 290                 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
 291                 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
 292                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 293                 xfs_trans_dqjoin(tp, q[1].qt_dquot);
 294         }
 295 }
 296
 297
 298 /*
 299  * Called by xfs_trans_commit() and similar in spirit to
 300  * xfs_trans_apply_sb_deltas().
 301  * Go thru all the dquots belonging to this transaction and modify the
 302  * INCORE dquot to reflect the actual usages.
 303  * Unreserve just the reservations done by this transaction.
 304  * dquot is still left locked at exit.
 305  */
 306 void
 307 xfs_trans_apply_dquot_deltas(
 308         struct xfs_trans        *tp)
 309 {
 310         int                     i, j;
 311         struct xfs_dquot        *dqp;
 312         struct xfs_dqtrx        *qtrx, *qa;
 313         struct xfs_disk_dquot   *d;
 314         int64_t                 totalbdelta;
 315         int64_t                 totalrtbdelta;
 316
 317         if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 318                 return;
 319
 320         ASSERT(tp->t_dqinfo);
 321         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 322                 qa = tp->t_dqinfo->dqs[j];
 323                 if (qa[0].qt_dquot == NULL)
 324                         continue;
 325
 326                 /*
 327                  * Lock all of the dquots and join them to the transaction.
 328                  */
 329                 xfs_trans_dqlockedjoin(tp, qa);
 330
 331                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 332                         qtrx = &qa[i];
 333                         /*
 334                          * The array of dquots is filled
 335                          * sequentially, not sparsely.
 336                          */
 337                         if ((dqp = qtrx->qt_dquot) == NULL)
 338                                 break;
 339
 340                         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 341
 342                         /*
 343                          * adjust the actual number of blocks used
 344                          */
 345                         d = &dqp->q_core;
 346
 347                         /*
 348                          * The issue here is - sometimes we don't make a blkquota
 349                          * reservation intentionally to be fair to users
 350                          * (when the amount is small). On the other hand,
 351                          * delayed allocs do make reservations, but that's
 352                          * outside of a transaction, so we have no
 353                          * idea how much was really reserved.
 354                          * So, here we've accumulated delayed allocation blks and
 355                          * non-delay blks. The assumption is that the
 356                          * delayed ones are always reserved (outside of a
 357                          * transaction), and the others may or may not have
 358                          * quota reservations.
 359                          */
 360                         totalbdelta = qtrx->qt_bcount_delta +
 361                                 qtrx->qt_delbcnt_delta;
 362                         totalrtbdelta = qtrx->qt_rtbcount_delta +
 363                                 qtrx->qt_delrtb_delta;
 364 #ifdef DEBUG
 365                         if (totalbdelta < 0)
 366                                 ASSERT(be64_to_cpu(d->d_bcount) >=
 367                                        -totalbdelta);
 368
 369                         if (totalrtbdelta < 0)
 370                                 ASSERT(be64_to_cpu(d->d_rtbcount) >=
 371                                        -totalrtbdelta);
 372
 373                         if (qtrx->qt_icount_delta < 0)
 374                                 ASSERT(be64_to_cpu(d->d_icount) >=
 375                                        -qtrx->qt_icount_delta);
 376 #endif
 377                         if (totalbdelta)
 378                                 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
 379
 380                         if (qtrx->qt_icount_delta)
 381                                 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
 382
 383                         if (totalrtbdelta)
 384                                 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
 385
 386                         /*
 387                          * Get any default limits in use.
 388                          * Start/reset the timer(s) if needed.
 389                          */
 390                         if (d->d_id) {
 391                                 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
 392                                 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
 393                         }
 394
 395                         dqp->dq_flags |= XFS_DQ_DIRTY;
 396                         /*
 397                          * add this to the list of items to get logged
 398                          */
 399                         xfs_trans_log_dquot(tp, dqp);
 400                         /*
 401                          * Take off what's left of the original reservation.
 402                          * In case of delayed allocations, there's no
 403                          * reservation that a transaction structure knows of.
 404                          */
 405                         if (qtrx->qt_blk_res != 0) {
 406                                 uint64_t        blk_res_used = 0;
 407
 408                                 if (qtrx->qt_bcount_delta > 0)
 409                                         blk_res_used = qtrx->qt_bcount_delta;
 410
 411                                 if (qtrx->qt_blk_res != blk_res_used) {
 412                                         if (qtrx->qt_blk_res > blk_res_used)
 413                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 414                                                         (qtrx->qt_blk_res -
 415                                                          blk_res_used);
 416                                         else
 417                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 418                                                         (blk_res_used -
 419                                                          qtrx->qt_blk_res);
 420                                 }
 421                         } else {
 422                                 /*
 423                                  * These blks were never reserved, either inside
 424                                  * a transaction or outside one (in a delayed
 425                                  * allocation). Also, this isn't always a
 426                                  * negative number since we sometimes
 427                                  * deliberately skip quota reservations.
 428                                  */
 429                                 if (qtrx->qt_bcount_delta) {
 430                                         dqp->q_res_bcount +=
 431                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
 432                                 }
 433                         }
 434                         /*
 435                          * Adjust the RT reservation.
 436                          */
 437                         if (qtrx->qt_rtblk_res != 0) {
 438                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
 439                                         if (qtrx->qt_rtblk_res >
 440                                             qtrx->qt_rtblk_res_used)
 441                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 442                                                        (qtrx->qt_rtblk_res -
 443                                                         qtrx->qt_rtblk_res_used);
 444                                         else
 445                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 446                                                        (qtrx->qt_rtblk_res_used -
 447                                                         qtrx->qt_rtblk_res);
 448                                 }
 449                         } else {
 450                                 if (qtrx->qt_rtbcount_delta)
 451                                         dqp->q_res_rtbcount +=
 452                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
 453                         }
 454
 455                         /*
 456                          * Adjust the inode reservation.
 457                          */
 458                         if (qtrx->qt_ino_res != 0) {
 459                                 ASSERT(qtrx->qt_ino_res >=
 460                                        qtrx->qt_ino_res_used);
 461                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
 462                                         dqp->q_res_icount -= (xfs_qcnt_t)
 463                                                 (qtrx->qt_ino_res -
 464                                                  qtrx->qt_ino_res_used);
 465                         } else {
 466                                 if (qtrx->qt_icount_delta)
 467                                         dqp->q_res_icount +=
 468                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
 469                         }
 470
 471                         ASSERT(dqp->q_res_bcount >=
 472                                 be64_to_cpu(dqp->q_core.d_bcount));
 473                         ASSERT(dqp->q_res_icount >=
 474                                 be64_to_cpu(dqp->q_core.d_icount));
 475                         ASSERT(dqp->q_res_rtbcount >=
 476                                 be64_to_cpu(dqp->q_core.d_rtbcount));
 477                 }
 478         }
 479 }
 480
 481 /*
 482  * Release the reservations, and adjust the dquots accordingly.
 483  * This is called only when the transaction is being aborted. If by
 484  * any chance we have done dquot modifications incore (ie. deltas) already,
 485  * we simply throw those away, since that's the expected behavior
 486  * when a transaction is curtailed without a commit.
 487  */
 488 void
 489 xfs_trans_unreserve_and_mod_dquots(
 490         struct xfs_trans        *tp)
 491 {
 492         int                     i, j;
 493         struct xfs_dquot        *dqp;
 494         struct xfs_dqtrx        *qtrx, *qa;
 495         bool                    locked;
 496
 497         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 498                 return;
 499
 500         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 501                 qa = tp->t_dqinfo->dqs[j];
 502
 503                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 504                         qtrx = &qa[i];
 505                         /*
 506                          * We assume that the array of dquots is filled
 507                          * sequentially, not sparsely.
 508                          */
 509                         if ((dqp = qtrx->qt_dquot) == NULL)
 510                                 break;
 511                         /*
 512                          * Unreserve the original reservation. We don't care
 513                          * about the number of blocks used field, or deltas.
 514                          * Also we don't bother to zero the fields.
 515                          */
 516                         locked = false;
 517                         if (qtrx->qt_blk_res) {
 518                                 xfs_dqlock(dqp);
 519                                 locked = true;
 520                                 dqp->q_res_bcount -=
 521                                         (xfs_qcnt_t)qtrx->qt_blk_res;
 522                         }
 523                         if (qtrx->qt_ino_res) {
 524                                 if (!locked) {
 525                                         xfs_dqlock(dqp);
 526                                         locked = true;
 527                                 }
 528                                 dqp->q_res_icount -=
 529                                         (xfs_qcnt_t)qtrx->qt_ino_res;
 530                         }
 531
 532                         if (qtrx->qt_rtblk_res) {
 533                                 if (!locked) {
 534                                         xfs_dqlock(dqp);
 535                                         locked = true;
 536                                 }
 537                                 dqp->q_res_rtbcount -=
 538                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
 539                         }
 540                         if (locked)
 541                                 xfs_dqunlock(dqp);
 542
 543                 }
 544         }
 545 }
 546
 547 STATIC void
 548 xfs_quota_warn(
 549         struct xfs_mount        *mp,
 550         struct xfs_dquot        *dqp,
 551         int                     type)
 552 {
 553         enum quota_type qtype;
 554
 555         if (dqp->dq_flags & XFS_DQ_PROJ)
 556                 qtype = PRJQUOTA;
 557         else if (dqp->dq_flags & XFS_DQ_USER)
 558                 qtype = USRQUOTA;
 559         else
 560                 qtype = GRPQUOTA;
 561
 562         quota_send_warning(make_kqid(&init_user_ns, qtype,
 563                                      be32_to_cpu(dqp->q_core.d_id)),
 564                            mp->m_super->s_dev, type);
 565 }
 566
 567 /*
 568  * This reserves disk blocks and inodes against a dquot.
 569  * Flags indicate if the dquot is to be locked here and also
 570  * if the blk reservation is for RT or regular blocks.
 571  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
 572  */
 573 STATIC int
 574 xfs_trans_dqresv(
 575         struct xfs_trans        *tp,
 576         struct xfs_mount        *mp,
 577         struct xfs_dquot        *dqp,
 578         int64_t                 nblks,
 579         long                    ninos,
 580         uint                    flags)
 581 {
 582         xfs_qcnt_t              hardlimit;
 583         xfs_qcnt_t              softlimit;
 584         time_t                  timer;
 585         xfs_qwarncnt_t          warns;
 586         xfs_qwarncnt_t          warnlimit;
 587         xfs_qcnt_t              total_count;
 588         xfs_qcnt_t              *resbcountp;
 589         xfs_quotainfo_t         *q = mp->m_quotainfo;
 590         struct xfs_def_quota    *defq;
 591
 592
 593         xfs_dqlock(dqp);
 594
 595         defq = xfs_get_defquota(dqp, q);
 596
 597         if (flags & XFS_TRANS_DQ_RES_BLKS) {
 598                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
 599                 if (!hardlimit)
 600                         hardlimit = defq->bhardlimit;
 601                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
 602                 if (!softlimit)
 603                         softlimit = defq->bsoftlimit;
 604                 timer = be32_to_cpu(dqp->q_core.d_btimer);
 605                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
 606                 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
 607                 resbcountp = &dqp->q_res_bcount;
 608         } else {
 609                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
 610                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
 611                 if (!hardlimit)
 612                         hardlimit = defq->rtbhardlimit;
 613                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
 614                 if (!softlimit)
 615                         softlimit = defq->rtbsoftlimit;
 616                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
 617                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
 618                 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
 619                 resbcountp = &dqp->q_res_rtbcount;
 620         }
 621
 622         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
 623             dqp->q_core.d_id &&
 624             ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
 625              (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
 626              (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
 627                 if (nblks > 0) {
 628                         /*
 629                          * dquot is locked already. See if we'd go over the
 630                          * hardlimit or exceed the timelimit if we allocate
 631                          * nblks.
 632                          */
 633                         total_count = *resbcountp + nblks;
 634                         if (hardlimit && total_count > hardlimit) {
 635                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
 636                                 goto error_return;
 637                         }
 638                         if (softlimit && total_count > softlimit) {
 639                                 if ((timer != 0 && get_seconds() > timer) ||
 640                                     (warns != 0 && warns >= warnlimit)) {
 641                                         xfs_quota_warn(mp, dqp,
 642                                                        QUOTA_NL_BSOFTLONGWARN);
 643                                         goto error_return;
 644                                 }
 645
 646                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
 647                         }
 648                 }
 649                 if (ninos > 0) {
 650                         total_count = dqp->q_res_icount + ninos;
 651                         timer = be32_to_cpu(dqp->q_core.d_itimer);
 652                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
 653                         warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
 654                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
 655                         if (!hardlimit)
 656                                 hardlimit = defq->ihardlimit;
 657                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
 658                         if (!softlimit)
 659                                 softlimit = defq->isoftlimit;
 660
 661                         if (hardlimit && total_count > hardlimit) {
 662                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
 663                                 goto error_return;
 664                         }
 665                         if (softlimit && total_count > softlimit) {
 666                                 if  ((timer != 0 && get_seconds() > timer) ||
 667                                      (warns != 0 && warns >= warnlimit)) {
 668                                         xfs_quota_warn(mp, dqp,
 669                                                        QUOTA_NL_ISOFTLONGWARN);
 670                                         goto error_return;
 671                                 }
 672                                 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
 673                         }
 674                 }
 675         }
 676
 677         /*
 678          * Change the reservation, but not the actual usage.
 679          * Note that q_res_bcount = q_core.d_bcount + resv
 680          */
 681         (*resbcountp) += (xfs_qcnt_t)nblks;
 682         if (ninos != 0)
 683                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
 684
 685         /*
 686          * note the reservation amt in the trans struct too,
 687          * so that the transaction knows how much was reserved by
 688          * it against this particular dquot.
 689          * We don't do this when we are reserving for a delayed allocation,
 690          * because we don't have the luxury of a transaction envelope then.
 691          */
 692         if (tp) {
 693                 ASSERT(tp->t_dqinfo);
 694                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 695                 if (nblks != 0)
 696                         xfs_trans_mod_dquot(tp, dqp,
 697                                             flags & XFS_QMOPT_RESBLK_MASK,
 698                                             nblks);
 699                 if (ninos != 0)
 700                         xfs_trans_mod_dquot(tp, dqp,
 701                                             XFS_TRANS_DQ_RES_INOS,
 702                                             ninos);
 703         }
 704
 705         if (XFS_IS_CORRUPT(mp,
 706                 dqp->q_res_bcount < be64_to_cpu(dqp->q_core.d_bcount)) ||
 707             XFS_IS_CORRUPT(mp,
 708                 dqp->q_res_rtbcount < be64_to_cpu(dqp->q_core.d_rtbcount)) ||
 709             XFS_IS_CORRUPT(mp,
 710                 dqp->q_res_icount < be64_to_cpu(dqp->q_core.d_icount)))
 711                 goto error_corrupt;
 712
 713         xfs_dqunlock(dqp);
 714         return 0;
 715
 716 error_return:
 717         xfs_dqunlock(dqp);
 718         if (flags & XFS_QMOPT_ENOSPC)
 719                 return -ENOSPC;
 720         return -EDQUOT;
 721 error_corrupt:
 722         xfs_dqunlock(dqp);
 723         xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
 724         return -EFSCORRUPTED;
 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         int64_t                 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,
 770                                         (flags & ~XFS_QMOPT_ENOSPC));
 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         int64_t                 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 struct xfs_qoff_logitem *
 839 xfs_trans_get_qoff_item(
 840         struct xfs_trans        *tp,
 841         struct xfs_qoff_logitem *startqoff,
 842         uint                    flags)
 843 {
 844         struct xfs_qoff_logitem *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         struct xfs_trans        *tp,
 867         struct xfs_qoff_logitem *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, 0);
 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 }