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