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