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
 107         /*
 108          * Because the quota blk reservation is carried forward,
 109          * it is also necessary to carry forward the DQ_DIRTY flag.
 110          */
 111         if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
 112                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
 113
 114         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 115                 oqa = otp->t_dqinfo->dqs[j];
 116                 nqa = ntp->t_dqinfo->dqs[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         }
 142 }
 143
 144 /*
 145  * Wrap around mod_dquot to account for both user and group quotas.
 146  */
 147 void
 148 xfs_trans_mod_dquot_byino(
 149         xfs_trans_t     *tp,
 150         xfs_inode_t     *ip,
 151         uint            field,
 152         long            delta)
 153 {
 154         xfs_mount_t     *mp = tp->t_mountp;
 155
 156         if (!XFS_IS_QUOTA_RUNNING(mp) ||
 157             !XFS_IS_QUOTA_ON(mp) ||
 158             xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
 159                 return;
 160
 161         if (tp->t_dqinfo == NULL)
 162                 xfs_trans_alloc_dqinfo(tp);
 163
 164         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
 165                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
 166         if (XFS_IS_OQUOTA_ON(mp) && ip->i_gdquot)
 167                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
 168 }
 169
 170 STATIC struct xfs_dqtrx *
 171 xfs_trans_get_dqtrx(
 172         struct xfs_trans        *tp,
 173         struct xfs_dquot        *dqp)
 174 {
 175         int                     i;
 176         struct xfs_dqtrx        *qa;
 177
 178         if (XFS_QM_ISUDQ(dqp))
 179                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_USR];
 180         else
 181                 qa = tp->t_dqinfo->dqs[XFS_QM_TRANS_GRP];
 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         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 342                 qa = tp->t_dqinfo->dqs[j];
 343                 if (qa[0].qt_dquot == NULL)
 344                         continue;
 345
 346                 /*
 347                  * Lock all of the dquots and join them to the transaction.
 348                  */
 349                 xfs_trans_dqlockedjoin(tp, qa);
 350
 351                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 352                         qtrx = &qa[i];
 353                         /*
 354                          * The array of dquots is filled
 355                          * sequentially, not sparsely.
 356                          */
 357                         if ((dqp = qtrx->qt_dquot) == NULL)
 358                                 break;
 359
 360                         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 361                         ASSERT(dqp->q_transp == tp);
 362
 363                         /*
 364                          * adjust the actual number of blocks used
 365                          */
 366                         d = &dqp->q_core;
 367
 368                         /*
 369                          * The issue here is - sometimes we don't make a blkquota
 370                          * reservation intentionally to be fair to users
 371                          * (when the amount is small). On the other hand,
 372                          * delayed allocs do make reservations, but that's
 373                          * outside of a transaction, so we have no
 374                          * idea how much was really reserved.
 375                          * So, here we've accumulated delayed allocation blks and
 376                          * non-delay blks. The assumption is that the
 377                          * delayed ones are always reserved (outside of a
 378                          * transaction), and the others may or may not have
 379                          * quota reservations.
 380                          */
 381                         totalbdelta = qtrx->qt_bcount_delta +
 382                                 qtrx->qt_delbcnt_delta;
 383                         totalrtbdelta = qtrx->qt_rtbcount_delta +
 384                                 qtrx->qt_delrtb_delta;
 385 #ifdef DEBUG
 386                         if (totalbdelta < 0)
 387                                 ASSERT(be64_to_cpu(d->d_bcount) >=
 388                                        -totalbdelta);
 389
 390                         if (totalrtbdelta < 0)
 391                                 ASSERT(be64_to_cpu(d->d_rtbcount) >=
 392                                        -totalrtbdelta);
 393
 394                         if (qtrx->qt_icount_delta < 0)
 395                                 ASSERT(be64_to_cpu(d->d_icount) >=
 396                                        -qtrx->qt_icount_delta);
 397 #endif
 398                         if (totalbdelta)
 399                                 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
 400
 401                         if (qtrx->qt_icount_delta)
 402                                 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
 403
 404                         if (totalrtbdelta)
 405                                 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
 406
 407                         /*
 408                          * Get any default limits in use.
 409                          * Start/reset the timer(s) if needed.
 410                          */
 411                         if (d->d_id) {
 412                                 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
 413                                 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
 414                         }
 415
 416                         dqp->dq_flags |= XFS_DQ_DIRTY;
 417                         /*
 418                          * add this to the list of items to get logged
 419                          */
 420                         xfs_trans_log_dquot(tp, dqp);
 421                         /*
 422                          * Take off what's left of the original reservation.
 423                          * In case of delayed allocations, there's no
 424                          * reservation that a transaction structure knows of.
 425                          */
 426                         if (qtrx->qt_blk_res != 0) {
 427                                 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
 428                                         if (qtrx->qt_blk_res >
 429                                             qtrx->qt_blk_res_used)
 430                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 431                                                         (qtrx->qt_blk_res -
 432                                                          qtrx->qt_blk_res_used);
 433                                         else
 434                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 435                                                         (qtrx->qt_blk_res_used -
 436                                                          qtrx->qt_blk_res);
 437                                 }
 438                         } else {
 439                                 /*
 440                                  * These blks were never reserved, either inside
 441                                  * a transaction or outside one (in a delayed
 442                                  * allocation). Also, this isn't always a
 443                                  * negative number since we sometimes
 444                                  * deliberately skip quota reservations.
 445                                  */
 446                                 if (qtrx->qt_bcount_delta) {
 447                                         dqp->q_res_bcount +=
 448                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
 449                                 }
 450                         }
 451                         /*
 452                          * Adjust the RT reservation.
 453                          */
 454                         if (qtrx->qt_rtblk_res != 0) {
 455                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
 456                                         if (qtrx->qt_rtblk_res >
 457                                             qtrx->qt_rtblk_res_used)
 458                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 459                                                        (qtrx->qt_rtblk_res -
 460                                                         qtrx->qt_rtblk_res_used);
 461                                         else
 462                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 463                                                        (qtrx->qt_rtblk_res_used -
 464                                                         qtrx->qt_rtblk_res);
 465                                 }
 466                         } else {
 467                                 if (qtrx->qt_rtbcount_delta)
 468                                         dqp->q_res_rtbcount +=
 469                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
 470                         }
 471
 472                         /*
 473                          * Adjust the inode reservation.
 474                          */
 475                         if (qtrx->qt_ino_res != 0) {
 476                                 ASSERT(qtrx->qt_ino_res >=
 477                                        qtrx->qt_ino_res_used);
 478                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
 479                                         dqp->q_res_icount -= (xfs_qcnt_t)
 480                                                 (qtrx->qt_ino_res -
 481                                                  qtrx->qt_ino_res_used);
 482                         } else {
 483                                 if (qtrx->qt_icount_delta)
 484                                         dqp->q_res_icount +=
 485                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
 486                         }
 487
 488                         ASSERT(dqp->q_res_bcount >=
 489                                 be64_to_cpu(dqp->q_core.d_bcount));
 490                         ASSERT(dqp->q_res_icount >=
 491                                 be64_to_cpu(dqp->q_core.d_icount));
 492                         ASSERT(dqp->q_res_rtbcount >=
 493                                 be64_to_cpu(dqp->q_core.d_rtbcount));
 494                 }
 495         }
 496 }
 497
 498 /*
 499  * Release the reservations, and adjust the dquots accordingly.
 500  * This is called only when the transaction is being aborted. If by
 501  * any chance we have done dquot modifications incore (ie. deltas) already,
 502  * we simply throw those away, since that's the expected behavior
 503  * when a transaction is curtailed without a commit.
 504  */
 505 void
 506 xfs_trans_unreserve_and_mod_dquots(
 507         xfs_trans_t             *tp)
 508 {
 509         int                     i, j;
 510         xfs_dquot_t             *dqp;
 511         xfs_dqtrx_t             *qtrx, *qa;
 512         bool                    locked;
 513
 514         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 515                 return;
 516
 517         for (j = 0; j < XFS_QM_TRANS_DQTYPES; j++) {
 518                 qa = tp->t_dqinfo->dqs[j];
 519
 520                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 521                         qtrx = &qa[i];
 522                         /*
 523                          * We assume that the array of dquots is filled
 524                          * sequentially, not sparsely.
 525                          */
 526                         if ((dqp = qtrx->qt_dquot) == NULL)
 527                                 break;
 528                         /*
 529                          * Unreserve the original reservation. We don't care
 530                          * about the number of blocks used field, or deltas.
 531                          * Also we don't bother to zero the fields.
 532                          */
 533                         locked = false;
 534                         if (qtrx->qt_blk_res) {
 535                                 xfs_dqlock(dqp);
 536                                 locked = true;
 537                                 dqp->q_res_bcount -=
 538                                         (xfs_qcnt_t)qtrx->qt_blk_res;
 539                         }
 540                         if (qtrx->qt_ino_res) {
 541                                 if (!locked) {
 542                                         xfs_dqlock(dqp);
 543                                         locked = true;
 544                                 }
 545                                 dqp->q_res_icount -=
 546                                         (xfs_qcnt_t)qtrx->qt_ino_res;
 547                         }
 548
 549                         if (qtrx->qt_rtblk_res) {
 550                                 if (!locked) {
 551                                         xfs_dqlock(dqp);
 552                                         locked = true;
 553                                 }
 554                                 dqp->q_res_rtbcount -=
 555                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
 556                         }
 557                         if (locked)
 558                                 xfs_dqunlock(dqp);
 559
 560                 }
 561         }
 562 }
 563
 564 STATIC void
 565 xfs_quota_warn(
 566         struct xfs_mount        *mp,
 567         struct xfs_dquot        *dqp,
 568         int                     type)
 569 {
 570         /* no warnings for project quotas - we just return ENOSPC later */
 571         if (dqp->dq_flags & XFS_DQ_PROJ)
 572                 return;
 573         quota_send_warning(make_kqid(&init_user_ns,
 574                                      (dqp->dq_flags & XFS_DQ_USER) ?
 575                                      USRQUOTA : GRPQUOTA,
 576                                      be32_to_cpu(dqp->q_core.d_id)),
 577                            mp->m_super->s_dev, type);
 578 }
 579
 580 /*
 581  * This reserves disk blocks and inodes against a dquot.
 582  * Flags indicate if the dquot is to be locked here and also
 583  * if the blk reservation is for RT or regular blocks.
 584  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
 585  */
 586 STATIC int
 587 xfs_trans_dqresv(
 588         xfs_trans_t     *tp,
 589         xfs_mount_t     *mp,
 590         xfs_dquot_t     *dqp,
 591         long            nblks,
 592         long            ninos,
 593         uint            flags)
 594 {
 595         xfs_qcnt_t      hardlimit;
 596         xfs_qcnt_t      softlimit;
 597         time_t          timer;
 598         xfs_qwarncnt_t  warns;
 599         xfs_qwarncnt_t  warnlimit;
 600         xfs_qcnt_t      total_count;
 601         xfs_qcnt_t      *resbcountp;
 602         xfs_quotainfo_t *q = mp->m_quotainfo;
 603
 604
 605         xfs_dqlock(dqp);
 606
 607         if (flags & XFS_TRANS_DQ_RES_BLKS) {
 608                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
 609                 if (!hardlimit)
 610                         hardlimit = q->qi_bhardlimit;
 611                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
 612                 if (!softlimit)
 613                         softlimit = q->qi_bsoftlimit;
 614                 timer = be32_to_cpu(dqp->q_core.d_btimer);
 615                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
 616                 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
 617                 resbcountp = &dqp->q_res_bcount;
 618         } else {
 619                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
 620                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
 621                 if (!hardlimit)
 622                         hardlimit = q->qi_rtbhardlimit;
 623                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
 624                 if (!softlimit)
 625                         softlimit = q->qi_rtbsoftlimit;
 626                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
 627                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
 628                 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
 629                 resbcountp = &dqp->q_res_rtbcount;
 630         }
 631
 632         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
 633             dqp->q_core.d_id &&
 634             ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
 635              (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
 636              (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {
 637                 if (nblks > 0) {
 638                         /*
 639                          * dquot is locked already. See if we'd go over the
 640                          * hardlimit or exceed the timelimit if we allocate
 641                          * nblks.
 642                          */
 643                         total_count = *resbcountp + nblks;
 644                         if (hardlimit && total_count > hardlimit) {
 645                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
 646                                 goto error_return;
 647                         }
 648                         if (softlimit && total_count > softlimit) {
 649                                 if ((timer != 0 && get_seconds() > timer) ||
 650                                     (warns != 0 && warns >= warnlimit)) {
 651                                         xfs_quota_warn(mp, dqp,
 652                                                        QUOTA_NL_BSOFTLONGWARN);
 653                                         goto error_return;
 654                                 }
 655
 656                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
 657                         }
 658                 }
 659                 if (ninos > 0) {
 660                         total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
 661                         timer = be32_to_cpu(dqp->q_core.d_itimer);
 662                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
 663                         warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
 664                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
 665                         if (!hardlimit)
 666                                 hardlimit = q->qi_ihardlimit;
 667                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
 668                         if (!softlimit)
 669                                 softlimit = q->qi_isoftlimit;
 670
 671                         if (hardlimit && total_count > hardlimit) {
 672                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
 673                                 goto error_return;
 674                         }
 675                         if (softlimit && total_count > softlimit) {
 676                                 if  ((timer != 0 && get_seconds() > timer) ||
 677                                      (warns != 0 && warns >= warnlimit)) {
 678                                         xfs_quota_warn(mp, dqp,
 679                                                        QUOTA_NL_ISOFTLONGWARN);
 680                                         goto error_return;
 681                                 }
 682                                 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
 683                         }
 684                 }
 685         }
 686
 687         /*
 688          * Change the reservation, but not the actual usage.
 689          * Note that q_res_bcount = q_core.d_bcount + resv
 690          */
 691         (*resbcountp) += (xfs_qcnt_t)nblks;
 692         if (ninos != 0)
 693                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
 694
 695         /*
 696          * note the reservation amt in the trans struct too,
 697          * so that the transaction knows how much was reserved by
 698          * it against this particular dquot.
 699          * We don't do this when we are reserving for a delayed allocation,
 700          * because we don't have the luxury of a transaction envelope then.
 701          */
 702         if (tp) {
 703                 ASSERT(tp->t_dqinfo);
 704                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 705                 if (nblks != 0)
 706                         xfs_trans_mod_dquot(tp, dqp,
 707                                             flags & XFS_QMOPT_RESBLK_MASK,
 708                                             nblks);
 709                 if (ninos != 0)
 710                         xfs_trans_mod_dquot(tp, dqp,
 711                                             XFS_TRANS_DQ_RES_INOS,
 712                                             ninos);
 713         }
 714         ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
 715         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
 716         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
 717
 718         xfs_dqunlock(dqp);
 719         return 0;
 720
 721 error_return:
 722         xfs_dqunlock(dqp);
 723         if (flags & XFS_QMOPT_ENOSPC)
 724                 return ENOSPC;
 725         return EDQUOT;
 726 }
 727
 728
 729 /*
 730  * Given dquot(s), make disk block and/or inode reservations against them.
 731  * The fact that this does the reservation against both the usr and
 732  * grp/prj quotas is important, because this follows a both-or-nothing
 733  * approach.
 734  *
 735  * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
 736  *         XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT.  Used by pquota.
 737  *         XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
 738  *         XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
 739  * dquots are unlocked on return, if they were not locked by caller.
 740  */
 741 int
 742 xfs_trans_reserve_quota_bydquots(
 743         struct xfs_trans        *tp,
 744         struct xfs_mount        *mp,
 745         struct xfs_dquot        *udqp,
 746         struct xfs_dquot        *gdqp,
 747         long                    nblks,
 748         long                    ninos,
 749         uint                    flags)
 750 {
 751         int             error;
 752
 753         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 754                 return 0;
 755
 756         if (tp && tp->t_dqinfo == NULL)
 757                 xfs_trans_alloc_dqinfo(tp);
 758
 759         ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 760
 761         if (udqp) {
 762                 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
 763                                         (flags & ~XFS_QMOPT_ENOSPC));
 764                 if (error)
 765                         return error;
 766         }
 767
 768         if (gdqp) {
 769                 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
 770                 if (error)
 771                         goto unwind_usr;
 772         }
 773
 774         /*
 775          * Didn't change anything critical, so, no need to log
 776          */
 777         return 0;
 778
 779 unwind_usr:
 780         flags |= XFS_QMOPT_FORCE_RES;
 781         if (udqp)
 782                 xfs_trans_dqresv(tp, mp, udqp, -nblks, -ninos, flags);
 783         return error;
 784 }
 785
 786
 787 /*
 788  * Lock the dquot and change the reservation if we can.
 789  * This doesn't change the actual usage, just the reservation.
 790  * The inode sent in is locked.
 791  */
 792 int
 793 xfs_trans_reserve_quota_nblks(
 794         struct xfs_trans        *tp,
 795         struct xfs_inode        *ip,
 796         long                    nblks,
 797         long                    ninos,
 798         uint                    flags)
 799 {
 800         struct xfs_mount        *mp = ip->i_mount;
 801
 802         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 803                 return 0;
 804         if (XFS_IS_PQUOTA_ON(mp))
 805                 flags |= XFS_QMOPT_ENOSPC;
 806
 807         ASSERT(!xfs_is_quota_inode(&mp->m_sb, ip->i_ino));
 808
 809         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 810         ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 811                                 XFS_TRANS_DQ_RES_RTBLKS ||
 812                (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 813                                 XFS_TRANS_DQ_RES_BLKS);
 814
 815         /*
 816          * Reserve nblks against these dquots, with trans as the mediator.
 817          */
 818         return xfs_trans_reserve_quota_bydquots(tp, mp,
 819                                                 ip->i_udquot, ip->i_gdquot,
 820                                                 nblks, ninos, flags);
 821 }
 822
 823 /*
 824  * This routine is called to allocate a quotaoff log item.
 825  */
 826 xfs_qoff_logitem_t *
 827 xfs_trans_get_qoff_item(
 828         xfs_trans_t             *tp,
 829         xfs_qoff_logitem_t      *startqoff,
 830         uint                    flags)
 831 {
 832         xfs_qoff_logitem_t      *q;
 833
 834         ASSERT(tp != NULL);
 835
 836         q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
 837         ASSERT(q != NULL);
 838
 839         /*
 840          * Get a log_item_desc to point at the new item.
 841          */
 842         xfs_trans_add_item(tp, &q->qql_item);
 843         return q;
 844 }
 845
 846
 847 /*
 848  * This is called to mark the quotaoff logitem as needing
 849  * to be logged when the transaction is committed.  The logitem must
 850  * already be associated with the given transaction.
 851  */
 852 void
 853 xfs_trans_log_quotaoff_item(
 854         xfs_trans_t             *tp,
 855         xfs_qoff_logitem_t      *qlp)
 856 {
 857         tp->t_flags |= XFS_TRANS_DIRTY;
 858         qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 859 }
 860
 861 STATIC void
 862 xfs_trans_alloc_dqinfo(
 863         xfs_trans_t     *tp)
 864 {
 865         tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
 866 }
 867
 868 void
 869 xfs_trans_free_dqinfo(
 870         xfs_trans_t     *tp)
 871 {
 872         if (!tp->t_dqinfo)
 873                 return;
 874         kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
 875         tp->t_dqinfo = NULL;
 876 }