err.no Git - linux-2.6/blob - fs/xfs/quota/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_bit.h"
  21 #include "xfs_log.h"
  22 #include "xfs_inum.h"
  23 #include "xfs_trans.h"
  24 #include "xfs_sb.h"
  25 #include "xfs_ag.h"
  26 #include "xfs_dir2.h"
  27 #include "xfs_alloc.h"
  28 #include "xfs_dmapi.h"
  29 #include "xfs_quota.h"
  30 #include "xfs_mount.h"
  31 #include "xfs_bmap_btree.h"
  32 #include "xfs_alloc_btree.h"
  33 #include "xfs_ialloc_btree.h"
  34 #include "xfs_attr_sf.h"
  35 #include "xfs_dir2_sf.h"
  36 #include "xfs_dinode.h"
  37 #include "xfs_inode.h"
  38 #include "xfs_ialloc.h"
  39 #include "xfs_itable.h"
  40 #include "xfs_btree.h"
  41 #include "xfs_bmap.h"
  42 #include "xfs_rtalloc.h"
  43 #include "xfs_error.h"
  44 #include "xfs_rw.h"
  45 #include "xfs_acl.h"
  46 #include "xfs_cap.h"
  47 #include "xfs_mac.h"
  48 #include "xfs_attr.h"
  49 #include "xfs_buf_item.h"
  50 #include "xfs_trans_priv.h"
  51 #include "xfs_qm.h"
  52
  53 STATIC void     xfs_trans_alloc_dqinfo(xfs_trans_t *);
  54
  55 /*
  56  * Add the locked dquot to the transaction.
  57  * The dquot must be locked, and it cannot be associated with any
  58  * transaction.
  59  */
  60 void
  61 xfs_trans_dqjoin(
  62         xfs_trans_t     *tp,
  63         xfs_dquot_t     *dqp)
  64 {
  65         xfs_dq_logitem_t    *lp;
  66
  67         ASSERT(! XFS_DQ_IS_ADDEDTO_TRX(tp, dqp));
  68         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  69         ASSERT(XFS_DQ_IS_LOGITEM_INITD(dqp));
  70         lp = &dqp->q_logitem;
  71
  72         /*
  73          * Get a log_item_desc to point at the new item.
  74          */
  75         (void) xfs_trans_add_item(tp, (xfs_log_item_t*)(lp));
  76
  77         /*
  78          * Initialize i_transp so we can later determine if this dquot is
  79          * associated with this transaction.
  80          */
  81         dqp->q_transp = tp;
  82 }
  83
  84
  85 /*
  86  * This is called to mark the dquot as needing
  87  * to be logged when the transaction is committed.  The dquot must
  88  * already be associated with the given transaction.
  89  * Note that it marks the entire transaction as dirty. In the ordinary
  90  * case, this gets called via xfs_trans_commit, after the transaction
  91  * is already dirty. However, there's nothing stop this from getting
  92  * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
  93  * flag.
  94  */
  95 void
  96 xfs_trans_log_dquot(
  97         xfs_trans_t     *tp,
  98         xfs_dquot_t     *dqp)
  99 {
 100         xfs_log_item_desc_t     *lidp;
 101
 102         ASSERT(XFS_DQ_IS_ADDEDTO_TRX(tp, dqp));
 103         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 104
 105         lidp = xfs_trans_find_item(tp, (xfs_log_item_t*)(&dqp->q_logitem));
 106         ASSERT(lidp != NULL);
 107
 108         tp->t_flags |= XFS_TRANS_DIRTY;
 109         lidp->lid_flags |= XFS_LID_DIRTY;
 110 }
 111
 112 /*
 113  * Carry forward whatever is left of the quota blk reservation to
 114  * the spanky new transaction
 115  */
 116 STATIC void
 117 xfs_trans_dup_dqinfo(
 118         xfs_trans_t     *otp,
 119         xfs_trans_t     *ntp)
 120 {
 121         xfs_dqtrx_t     *oq, *nq;
 122         int             i,j;
 123         xfs_dqtrx_t     *oqa, *nqa;
 124
 125         if (!otp->t_dqinfo)
 126                 return;
 127
 128         xfs_trans_alloc_dqinfo(ntp);
 129         oqa = otp->t_dqinfo->dqa_usrdquots;
 130         nqa = ntp->t_dqinfo->dqa_usrdquots;
 131
 132         /*
 133          * Because the quota blk reservation is carried forward,
 134          * it is also necessary to carry forward the DQ_DIRTY flag.
 135          */
 136         if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
 137                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
 138
 139         for (j = 0; j < 2; j++) {
 140                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 141                         if (oqa[i].qt_dquot == NULL)
 142                                 break;
 143                         oq = &oqa[i];
 144                         nq = &nqa[i];
 145
 146                         nq->qt_dquot = oq->qt_dquot;
 147                         nq->qt_bcount_delta = nq->qt_icount_delta = 0;
 148                         nq->qt_rtbcount_delta = 0;
 149
 150                         /*
 151                          * Transfer whatever is left of the reservations.
 152                          */
 153                         nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
 154                         oq->qt_blk_res = oq->qt_blk_res_used;
 155
 156                         nq->qt_rtblk_res = oq->qt_rtblk_res -
 157                                 oq->qt_rtblk_res_used;
 158                         oq->qt_rtblk_res = oq->qt_rtblk_res_used;
 159
 160                         nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
 161                         oq->qt_ino_res = oq->qt_ino_res_used;
 162
 163                 }
 164                 oqa = otp->t_dqinfo->dqa_grpdquots;
 165                 nqa = ntp->t_dqinfo->dqa_grpdquots;
 166         }
 167 }
 168
 169 /*
 170  * Wrap around mod_dquot to account for both user and group quotas.
 171  */
 172 STATIC void
 173 xfs_trans_mod_dquot_byino(
 174         xfs_trans_t     *tp,
 175         xfs_inode_t     *ip,
 176         uint            field,
 177         long            delta)
 178 {
 179         xfs_mount_t     *mp;
 180
 181         ASSERT(tp);
 182         mp = tp->t_mountp;
 183
 184         if (!XFS_IS_QUOTA_ON(mp) ||
 185             ip->i_ino == mp->m_sb.sb_uquotino ||
 186             ip->i_ino == mp->m_sb.sb_gquotino)
 187                 return;
 188
 189         if (tp->t_dqinfo == NULL)
 190                 xfs_trans_alloc_dqinfo(tp);
 191
 192         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
 193                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
 194         if (XFS_IS_OQUOTA_ON(mp) && ip->i_gdquot)
 195                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
 196 }
 197
 198 STATIC xfs_dqtrx_t *
 199 xfs_trans_get_dqtrx(
 200         xfs_trans_t     *tp,
 201         xfs_dquot_t     *dqp)
 202 {
 203         int             i;
 204         xfs_dqtrx_t     *qa;
 205
 206         for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 207                 qa = XFS_QM_DQP_TO_DQACCT(tp, dqp);
 208
 209                 if (qa[i].qt_dquot == NULL ||
 210                     qa[i].qt_dquot == dqp) {
 211                         return (&qa[i]);
 212                 }
 213         }
 214
 215         return (NULL);
 216 }
 217
 218 /*
 219  * Make the changes in the transaction structure.
 220  * The moral equivalent to xfs_trans_mod_sb().
 221  * We don't touch any fields in the dquot, so we don't care
 222  * if it's locked or not (most of the time it won't be).
 223  */
 224 void
 225 xfs_trans_mod_dquot(
 226         xfs_trans_t     *tp,
 227         xfs_dquot_t     *dqp,
 228         uint            field,
 229         long            delta)
 230 {
 231         xfs_dqtrx_t     *qtrx;
 232
 233         ASSERT(tp);
 234         qtrx = NULL;
 235
 236         if (tp->t_dqinfo == NULL)
 237                 xfs_trans_alloc_dqinfo(tp);
 238         /*
 239          * Find either the first free slot or the slot that belongs
 240          * to this dquot.
 241          */
 242         qtrx = xfs_trans_get_dqtrx(tp, dqp);
 243         ASSERT(qtrx);
 244         if (qtrx->qt_dquot == NULL)
 245                 qtrx->qt_dquot = dqp;
 246
 247         switch (field) {
 248
 249                 /*
 250                  * regular disk blk reservation
 251                  */
 252               case XFS_TRANS_DQ_RES_BLKS:
 253                 qtrx->qt_blk_res += (ulong)delta;
 254                 break;
 255
 256                 /*
 257                  * inode reservation
 258                  */
 259               case XFS_TRANS_DQ_RES_INOS:
 260                 qtrx->qt_ino_res += (ulong)delta;
 261                 break;
 262
 263                 /*
 264                  * disk blocks used.
 265                  */
 266               case XFS_TRANS_DQ_BCOUNT:
 267                 if (qtrx->qt_blk_res && delta > 0) {
 268                         qtrx->qt_blk_res_used += (ulong)delta;
 269                         ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
 270                 }
 271                 qtrx->qt_bcount_delta += delta;
 272                 break;
 273
 274               case XFS_TRANS_DQ_DELBCOUNT:
 275                 qtrx->qt_delbcnt_delta += delta;
 276                 break;
 277
 278                 /*
 279                  * Inode Count
 280                  */
 281               case XFS_TRANS_DQ_ICOUNT:
 282                 if (qtrx->qt_ino_res && delta > 0) {
 283                         qtrx->qt_ino_res_used += (ulong)delta;
 284                         ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
 285                 }
 286                 qtrx->qt_icount_delta += delta;
 287                 break;
 288
 289                 /*
 290                  * rtblk reservation
 291                  */
 292               case XFS_TRANS_DQ_RES_RTBLKS:
 293                 qtrx->qt_rtblk_res += (ulong)delta;
 294                 break;
 295
 296                 /*
 297                  * rtblk count
 298                  */
 299               case XFS_TRANS_DQ_RTBCOUNT:
 300                 if (qtrx->qt_rtblk_res && delta > 0) {
 301                         qtrx->qt_rtblk_res_used += (ulong)delta;
 302                         ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
 303                 }
 304                 qtrx->qt_rtbcount_delta += delta;
 305                 break;
 306
 307               case XFS_TRANS_DQ_DELRTBCOUNT:
 308                 qtrx->qt_delrtb_delta += delta;
 309                 break;
 310
 311               default:
 312                 ASSERT(0);
 313         }
 314         tp->t_flags |= XFS_TRANS_DQ_DIRTY;
 315 }
 316
 317
 318 /*
 319  * Given an array of dqtrx structures, lock all the dquots associated
 320  * and join them to the transaction, provided they have been modified.
 321  * We know that the highest number of dquots (of one type - usr OR grp),
 322  * involved in a transaction is 2 and that both usr and grp combined - 3.
 323  * So, we don't attempt to make this very generic.
 324  */
 325 STATIC void
 326 xfs_trans_dqlockedjoin(
 327         xfs_trans_t     *tp,
 328         xfs_dqtrx_t     *q)
 329 {
 330         ASSERT(q[0].qt_dquot != NULL);
 331         if (q[1].qt_dquot == NULL) {
 332                 xfs_dqlock(q[0].qt_dquot);
 333                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 334         } else {
 335                 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
 336                 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
 337                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 338                 xfs_trans_dqjoin(tp, q[1].qt_dquot);
 339         }
 340 }
 341
 342
 343 /*
 344  * Called by xfs_trans_commit() and similar in spirit to
 345  * xfs_trans_apply_sb_deltas().
 346  * Go thru all the dquots belonging to this transaction and modify the
 347  * INCORE dquot to reflect the actual usages.
 348  * Unreserve just the reservations done by this transaction.
 349  * dquot is still left locked at exit.
 350  */
 351 STATIC void
 352 xfs_trans_apply_dquot_deltas(
 353         xfs_trans_t             *tp)
 354 {
 355         int                     i, j;
 356         xfs_dquot_t             *dqp;
 357         xfs_dqtrx_t             *qtrx, *qa;
 358         xfs_disk_dquot_t        *d;
 359         long                    totalbdelta;
 360         long                    totalrtbdelta;
 361
 362         if (! (tp->t_flags & XFS_TRANS_DQ_DIRTY))
 363                 return;
 364
 365         ASSERT(tp->t_dqinfo);
 366         qa = tp->t_dqinfo->dqa_usrdquots;
 367         for (j = 0; j < 2; j++) {
 368                 if (qa[0].qt_dquot == NULL) {
 369                         qa = tp->t_dqinfo->dqa_grpdquots;
 370                         continue;
 371                 }
 372
 373                 /*
 374                  * Lock all of the dquots and join them to the transaction.
 375                  */
 376                 xfs_trans_dqlockedjoin(tp, qa);
 377
 378                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 379                         qtrx = &qa[i];
 380                         /*
 381                          * The array of dquots is filled
 382                          * sequentially, not sparsely.
 383                          */
 384                         if ((dqp = qtrx->qt_dquot) == NULL)
 385                                 break;
 386
 387                         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 388                         ASSERT(XFS_DQ_IS_ADDEDTO_TRX(tp, dqp));
 389
 390                         /*
 391                          * adjust the actual number of blocks used
 392                          */
 393                         d = &dqp->q_core;
 394
 395                         /*
 396                          * The issue here is - sometimes we don't make a blkquota
 397                          * reservation intentionally to be fair to users
 398                          * (when the amount is small). On the other hand,
 399                          * delayed allocs do make reservations, but that's
 400                          * outside of a transaction, so we have no
 401                          * idea how much was really reserved.
 402                          * So, here we've accumulated delayed allocation blks and
 403                          * non-delay blks. The assumption is that the
 404                          * delayed ones are always reserved (outside of a
 405                          * transaction), and the others may or may not have
 406                          * quota reservations.
 407                          */
 408                         totalbdelta = qtrx->qt_bcount_delta +
 409                                 qtrx->qt_delbcnt_delta;
 410                         totalrtbdelta = qtrx->qt_rtbcount_delta +
 411                                 qtrx->qt_delrtb_delta;
 412 #ifdef QUOTADEBUG
 413                         if (totalbdelta < 0)
 414                                 ASSERT(be64_to_cpu(d->d_bcount) >=
 415                                        (xfs_qcnt_t) -totalbdelta);
 416
 417                         if (totalrtbdelta < 0)
 418                                 ASSERT(be64_to_cpu(d->d_rtbcount) >=
 419                                        (xfs_qcnt_t) -totalrtbdelta);
 420
 421                         if (qtrx->qt_icount_delta < 0)
 422                                 ASSERT(be64_to_cpu(d->d_icount) >=
 423                                        (xfs_qcnt_t) -qtrx->qt_icount_delta);
 424 #endif
 425                         if (totalbdelta)
 426                                 be64_add(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
 427
 428                         if (qtrx->qt_icount_delta)
 429                                 be64_add(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
 430
 431                         if (totalrtbdelta)
 432                                 be64_add(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
 433
 434                         /*
 435                          * Get any default limits in use.
 436                          * Start/reset the timer(s) if needed.
 437                          */
 438                         if (d->d_id) {
 439                                 xfs_qm_adjust_dqlimits(tp->t_mountp, d);
 440                                 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
 441                         }
 442
 443                         dqp->dq_flags |= XFS_DQ_DIRTY;
 444                         /*
 445                          * add this to the list of items to get logged
 446                          */
 447                         xfs_trans_log_dquot(tp, dqp);
 448                         /*
 449                          * Take off what's left of the original reservation.
 450                          * In case of delayed allocations, there's no
 451                          * reservation that a transaction structure knows of.
 452                          */
 453                         if (qtrx->qt_blk_res != 0) {
 454                                 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
 455                                         if (qtrx->qt_blk_res >
 456                                             qtrx->qt_blk_res_used)
 457                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 458                                                         (qtrx->qt_blk_res -
 459                                                          qtrx->qt_blk_res_used);
 460                                         else
 461                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 462                                                         (qtrx->qt_blk_res_used -
 463                                                          qtrx->qt_blk_res);
 464                                 }
 465                         } else {
 466                                 /*
 467                                  * These blks were never reserved, either inside
 468                                  * a transaction or outside one (in a delayed
 469                                  * allocation). Also, this isn't always a
 470                                  * negative number since we sometimes
 471                                  * deliberately skip quota reservations.
 472                                  */
 473                                 if (qtrx->qt_bcount_delta) {
 474                                         dqp->q_res_bcount +=
 475                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
 476                                 }
 477                         }
 478                         /*
 479                          * Adjust the RT reservation.
 480                          */
 481                         if (qtrx->qt_rtblk_res != 0) {
 482                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
 483                                         if (qtrx->qt_rtblk_res >
 484                                             qtrx->qt_rtblk_res_used)
 485                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 486                                                        (qtrx->qt_rtblk_res -
 487                                                         qtrx->qt_rtblk_res_used);
 488                                         else
 489                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 490                                                        (qtrx->qt_rtblk_res_used -
 491                                                         qtrx->qt_rtblk_res);
 492                                 }
 493                         } else {
 494                                 if (qtrx->qt_rtbcount_delta)
 495                                         dqp->q_res_rtbcount +=
 496                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
 497                         }
 498
 499                         /*
 500                          * Adjust the inode reservation.
 501                          */
 502                         if (qtrx->qt_ino_res != 0) {
 503                                 ASSERT(qtrx->qt_ino_res >=
 504                                        qtrx->qt_ino_res_used);
 505                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
 506                                         dqp->q_res_icount -= (xfs_qcnt_t)
 507                                                 (qtrx->qt_ino_res -
 508                                                  qtrx->qt_ino_res_used);
 509                         } else {
 510                                 if (qtrx->qt_icount_delta)
 511                                         dqp->q_res_icount +=
 512                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
 513                         }
 514
 515                         ASSERT(dqp->q_res_bcount >=
 516                                 be64_to_cpu(dqp->q_core.d_bcount));
 517                         ASSERT(dqp->q_res_icount >=
 518                                 be64_to_cpu(dqp->q_core.d_icount));
 519                         ASSERT(dqp->q_res_rtbcount >=
 520                                 be64_to_cpu(dqp->q_core.d_rtbcount));
 521                 }
 522                 /*
 523                  * Do the group quotas next
 524                  */
 525                 qa = tp->t_dqinfo->dqa_grpdquots;
 526         }
 527 }
 528
 529 /*
 530  * Release the reservations, and adjust the dquots accordingly.
 531  * This is called only when the transaction is being aborted. If by
 532  * any chance we have done dquot modifications incore (ie. deltas) already,
 533  * we simply throw those away, since that's the expected behavior
 534  * when a transaction is curtailed without a commit.
 535  */
 536 STATIC void
 537 xfs_trans_unreserve_and_mod_dquots(
 538         xfs_trans_t             *tp)
 539 {
 540         int                     i, j;
 541         xfs_dquot_t             *dqp;
 542         xfs_dqtrx_t             *qtrx, *qa;
 543         boolean_t               locked;
 544
 545         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 546                 return;
 547
 548         qa = tp->t_dqinfo->dqa_usrdquots;
 549
 550         for (j = 0; j < 2; j++) {
 551                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 552                         qtrx = &qa[i];
 553                         /*
 554                          * We assume that the array of dquots is filled
 555                          * sequentially, not sparsely.
 556                          */
 557                         if ((dqp = qtrx->qt_dquot) == NULL)
 558                                 break;
 559                         /*
 560                          * Unreserve the original reservation. We don't care
 561                          * about the number of blocks used field, or deltas.
 562                          * Also we don't bother to zero the fields.
 563                          */
 564                         locked = B_FALSE;
 565                         if (qtrx->qt_blk_res) {
 566                                 xfs_dqlock(dqp);
 567                                 locked = B_TRUE;
 568                                 dqp->q_res_bcount -=
 569                                         (xfs_qcnt_t)qtrx->qt_blk_res;
 570                         }
 571                         if (qtrx->qt_ino_res) {
 572                                 if (!locked) {
 573                                         xfs_dqlock(dqp);
 574                                         locked = B_TRUE;
 575                                 }
 576                                 dqp->q_res_icount -=
 577                                         (xfs_qcnt_t)qtrx->qt_ino_res;
 578                         }
 579
 580                         if (qtrx->qt_rtblk_res) {
 581                                 if (!locked) {
 582                                         xfs_dqlock(dqp);
 583                                         locked = B_TRUE;
 584                                 }
 585                                 dqp->q_res_rtbcount -=
 586                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
 587                         }
 588                         if (locked)
 589                                 xfs_dqunlock(dqp);
 590
 591                 }
 592                 qa = tp->t_dqinfo->dqa_grpdquots;
 593         }
 594 }
 595
 596 STATIC int
 597 xfs_quota_error(uint flags)
 598 {
 599         if (flags & XFS_QMOPT_ENOSPC)
 600                 return ENOSPC;
 601         return EDQUOT;
 602 }
 603
 604 /*
 605  * This reserves disk blocks and inodes against a dquot.
 606  * Flags indicate if the dquot is to be locked here and also
 607  * if the blk reservation is for RT or regular blocks.
 608  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
 609  */
 610 STATIC int
 611 xfs_trans_dqresv(
 612         xfs_trans_t     *tp,
 613         xfs_mount_t     *mp,
 614         xfs_dquot_t     *dqp,
 615         long            nblks,
 616         long            ninos,
 617         uint            flags)
 618 {
 619         int             error;
 620         xfs_qcnt_t      hardlimit;
 621         xfs_qcnt_t      softlimit;
 622         time_t          timer;
 623         xfs_qwarncnt_t  warns;
 624         xfs_qwarncnt_t  warnlimit;
 625         xfs_qcnt_t      count;
 626         xfs_qcnt_t      *resbcountp;
 627         xfs_quotainfo_t *q = mp->m_quotainfo;
 628
 629         if (! (flags & XFS_QMOPT_DQLOCK)) {
 630                 xfs_dqlock(dqp);
 631         }
 632         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 633         if (flags & XFS_TRANS_DQ_RES_BLKS) {
 634                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
 635                 if (!hardlimit)
 636                         hardlimit = q->qi_bhardlimit;
 637                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
 638                 if (!softlimit)
 639                         softlimit = q->qi_bsoftlimit;
 640                 timer = be32_to_cpu(dqp->q_core.d_btimer);
 641                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
 642                 warnlimit = XFS_QI_BWARNLIMIT(dqp->q_mount);
 643                 resbcountp = &dqp->q_res_bcount;
 644         } else {
 645                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
 646                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
 647                 if (!hardlimit)
 648                         hardlimit = q->qi_rtbhardlimit;
 649                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
 650                 if (!softlimit)
 651                         softlimit = q->qi_rtbsoftlimit;
 652                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
 653                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
 654                 warnlimit = XFS_QI_RTBWARNLIMIT(dqp->q_mount);
 655                 resbcountp = &dqp->q_res_rtbcount;
 656         }
 657         error = 0;
 658
 659         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
 660             dqp->q_core.d_id &&
 661             XFS_IS_QUOTA_ENFORCED(dqp->q_mount)) {
 662 #ifdef QUOTADEBUG
 663                 cmn_err(CE_DEBUG, "BLK Res: nblks=%ld + resbcount=%Ld"
 664                           " > hardlimit=%Ld?", nblks, *resbcountp, hardlimit);
 665 #endif
 666                 if (nblks > 0) {
 667                         /*
 668                          * dquot is locked already. See if we'd go over the
 669                          * hardlimit or exceed the timelimit if we allocate
 670                          * nblks.
 671                          */
 672                         if (hardlimit > 0ULL &&
 673                              (hardlimit <= nblks + *resbcountp)) {
 674                                 error = xfs_quota_error(flags);
 675                                 goto error_return;
 676                         }
 677
 678                         if (softlimit > 0ULL &&
 679                              (softlimit <= nblks + *resbcountp)) {
 680                                 if ((timer != 0 && get_seconds() > timer) ||
 681                                     (warns != 0 && warns >= warnlimit)) {
 682                                         error = xfs_quota_error(flags);
 683                                         goto error_return;
 684                                 }
 685                         }
 686                 }
 687                 if (ninos > 0) {
 688                         count = be64_to_cpu(dqp->q_core.d_icount);
 689                         timer = be32_to_cpu(dqp->q_core.d_itimer);
 690                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
 691                         warnlimit = XFS_QI_IWARNLIMIT(dqp->q_mount);
 692                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
 693                         if (!hardlimit)
 694                                 hardlimit = q->qi_ihardlimit;
 695                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
 696                         if (!softlimit)
 697                                 softlimit = q->qi_isoftlimit;
 698                         if (hardlimit > 0ULL && count >= hardlimit) {
 699                                 error = xfs_quota_error(flags);
 700                                 goto error_return;
 701                         } else if (softlimit > 0ULL && count >= softlimit) {
 702                                 if ((timer != 0 && get_seconds() > timer) ||
 703                                      (warns != 0 && warns >= warnlimit)) {
 704                                         error = xfs_quota_error(flags);
 705                                         goto error_return;
 706                                 }
 707                         }
 708                 }
 709         }
 710
 711         /*
 712          * Change the reservation, but not the actual usage.
 713          * Note that q_res_bcount = q_core.d_bcount + resv
 714          */
 715         (*resbcountp) += (xfs_qcnt_t)nblks;
 716         if (ninos != 0)
 717                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
 718
 719         /*
 720          * note the reservation amt in the trans struct too,
 721          * so that the transaction knows how much was reserved by
 722          * it against this particular dquot.
 723          * We don't do this when we are reserving for a delayed allocation,
 724          * because we don't have the luxury of a transaction envelope then.
 725          */
 726         if (tp) {
 727                 ASSERT(tp->t_dqinfo);
 728                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 729                 if (nblks != 0)
 730                         xfs_trans_mod_dquot(tp, dqp,
 731                                             flags & XFS_QMOPT_RESBLK_MASK,
 732                                             nblks);
 733                 if (ninos != 0)
 734                         xfs_trans_mod_dquot(tp, dqp,
 735                                             XFS_TRANS_DQ_RES_INOS,
 736                                             ninos);
 737         }
 738         ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
 739         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
 740         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
 741
 742 error_return:
 743         if (! (flags & XFS_QMOPT_DQLOCK)) {
 744                 xfs_dqunlock(dqp);
 745         }
 746         return (error);
 747 }
 748
 749
 750 /*
 751  * Given dquot(s), make disk block and/or inode reservations against them.
 752  * The fact that this does the reservation against both the usr and
 753  * grp/prj quotas is important, because this follows a both-or-nothing
 754  * approach.
 755  *
 756  * flags = XFS_QMOPT_DQLOCK indicate if dquot(s) need to be locked.
 757  *         XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
 758  *         XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT.  Used by pquota.
 759  *         XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
 760  *         XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
 761  * dquots are unlocked on return, if they were not locked by caller.
 762  */
 763 int
 764 xfs_trans_reserve_quota_bydquots(
 765         xfs_trans_t     *tp,
 766         xfs_mount_t     *mp,
 767         xfs_dquot_t     *udqp,
 768         xfs_dquot_t     *gdqp,
 769         long            nblks,
 770         long            ninos,
 771         uint            flags)
 772 {
 773         int             resvd = 0, error;
 774
 775         if (!XFS_IS_QUOTA_ON(mp))
 776                 return 0;
 777
 778         if (tp && tp->t_dqinfo == NULL)
 779                 xfs_trans_alloc_dqinfo(tp);
 780
 781         ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 782
 783         if (udqp) {
 784                 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
 785                                         (flags & ~XFS_QMOPT_ENOSPC));
 786                 if (error)
 787                         return error;
 788                 resvd = 1;
 789         }
 790
 791         if (gdqp) {
 792                 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
 793                 if (error) {
 794                         /*
 795                          * can't do it, so backout previous reservation
 796                          */
 797                         if (resvd) {
 798                                 flags |= XFS_QMOPT_FORCE_RES;
 799                                 xfs_trans_dqresv(tp, mp, udqp,
 800                                                  -nblks, -ninos, flags);
 801                         }
 802                         return error;
 803                 }
 804         }
 805
 806         /*
 807          * Didn't change anything critical, so, no need to log
 808          */
 809         return 0;
 810 }
 811
 812
 813 /*
 814  * Lock the dquot and change the reservation if we can.
 815  * This doesn't change the actual usage, just the reservation.
 816  * The inode sent in is locked.
 817  */
 818 STATIC int
 819 xfs_trans_reserve_quota_nblks(
 820         xfs_trans_t     *tp,
 821         xfs_mount_t     *mp,
 822         xfs_inode_t     *ip,
 823         long            nblks,
 824         long            ninos,
 825         uint            flags)
 826 {
 827         int             error;
 828
 829         if (!XFS_IS_QUOTA_ON(mp))
 830                 return 0;
 831         if (XFS_IS_PQUOTA_ON(mp))
 832                 flags |= XFS_QMOPT_ENOSPC;
 833
 834         ASSERT(ip->i_ino != mp->m_sb.sb_uquotino);
 835         ASSERT(ip->i_ino != mp->m_sb.sb_gquotino);
 836
 837         ASSERT(XFS_ISLOCKED_INODE_EXCL(ip));
 838         ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
 839         ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 840                                 XFS_TRANS_DQ_RES_RTBLKS ||
 841                (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 842                                 XFS_TRANS_DQ_RES_BLKS);
 843
 844         /*
 845          * Reserve nblks against these dquots, with trans as the mediator.
 846          */
 847         error = xfs_trans_reserve_quota_bydquots(tp, mp,
 848                                                  ip->i_udquot, ip->i_gdquot,
 849                                                  nblks, ninos,
 850                                                  flags);
 851         return error;
 852 }
 853
 854 /*
 855  * This routine is called to allocate a quotaoff log item.
 856  */
 857 xfs_qoff_logitem_t *
 858 xfs_trans_get_qoff_item(
 859         xfs_trans_t             *tp,
 860         xfs_qoff_logitem_t      *startqoff,
 861         uint                    flags)
 862 {
 863         xfs_qoff_logitem_t      *q;
 864
 865         ASSERT(tp != NULL);
 866
 867         q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
 868         ASSERT(q != NULL);
 869
 870         /*
 871          * Get a log_item_desc to point at the new item.
 872          */
 873         (void) xfs_trans_add_item(tp, (xfs_log_item_t*)q);
 874
 875         return (q);
 876 }
 877
 878
 879 /*
 880  * This is called to mark the quotaoff logitem as needing
 881  * to be logged when the transaction is committed.  The logitem must
 882  * already be associated with the given transaction.
 883  */
 884 void
 885 xfs_trans_log_quotaoff_item(
 886         xfs_trans_t             *tp,
 887         xfs_qoff_logitem_t      *qlp)
 888 {
 889         xfs_log_item_desc_t     *lidp;
 890
 891         lidp = xfs_trans_find_item(tp, (xfs_log_item_t *)qlp);
 892         ASSERT(lidp != NULL);
 893
 894         tp->t_flags |= XFS_TRANS_DIRTY;
 895         lidp->lid_flags |= XFS_LID_DIRTY;
 896 }
 897
 898 STATIC void
 899 xfs_trans_alloc_dqinfo(
 900         xfs_trans_t     *tp)
 901 {
 902         (tp)->t_dqinfo = kmem_zone_zalloc(xfs_Gqm->qm_dqtrxzone, KM_SLEEP);
 903 }
 904
 905 STATIC void
 906 xfs_trans_free_dqinfo(
 907         xfs_trans_t     *tp)
 908 {
 909         if (!tp->t_dqinfo)
 910                 return;
 911         kmem_zone_free(xfs_Gqm->qm_dqtrxzone, (tp)->t_dqinfo);
 912         (tp)->t_dqinfo = NULL;
 913 }
 914
 915 xfs_dqtrxops_t  xfs_trans_dquot_ops = {
 916         .qo_dup_dqinfo                  = xfs_trans_dup_dqinfo,
 917         .qo_free_dqinfo                 = xfs_trans_free_dqinfo,
 918         .qo_mod_dquot_byino             = xfs_trans_mod_dquot_byino,
 919         .qo_apply_dquot_deltas          = xfs_trans_apply_dquot_deltas,
 920         .qo_reserve_quota_nblks         = xfs_trans_reserve_quota_nblks,
 921         .qo_reserve_quota_bydquots      = xfs_trans_reserve_quota_bydquots,
 922         .qo_unreserve_and_mod_dquots    = xfs_trans_unreserve_and_mod_dquots,
 923 };