fs/xfs/xfs_trans_dquot.c

   1 /*
   2  * Copyright (c) 2000-2002 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_fs.h"
  20 #include "xfs_log.h"
  21 #include "xfs_trans.h"
  22 #include "xfs_sb.h"
  23 #include "xfs_ag.h"
  24 #include "xfs_alloc.h"
  25 #include "xfs_quota.h"
  26 #include "xfs_mount.h"
  27 #include "xfs_bmap_btree.h"
  28 #include "xfs_inode.h"
  29 #include "xfs_itable.h"
  30 #include "xfs_bmap.h"
  31 #include "xfs_rtalloc.h"
  32 #include "xfs_error.h"
  33 #include "xfs_attr.h"
  34 #include "xfs_buf_item.h"
  35 #include "xfs_trans_priv.h"
  36 #include "xfs_qm.h"
  37
  38 STATIC void     xfs_trans_alloc_dqinfo(xfs_trans_t *);
  39
  40 /*
  41  * Add the locked dquot to the transaction.
  42  * The dquot must be locked, and it cannot be associated with any
  43  * transaction.
  44  */
  45 void
  46 xfs_trans_dqjoin(
  47         xfs_trans_t     *tp,
  48         xfs_dquot_t     *dqp)
  49 {
  50         ASSERT(dqp->q_transp != tp);
  51         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  52         ASSERT(dqp->q_logitem.qli_dquot == dqp);
  53
  54         /*
  55          * Get a log_item_desc to point at the new item.
  56          */
  57         xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
  58
  59         /*
  60          * Initialize d_transp so we can later determine if this dquot is
  61          * associated with this transaction.
  62          */
  63         dqp->q_transp = tp;
  64 }
  65
  66
  67 /*
  68  * This is called to mark the dquot as needing
  69  * to be logged when the transaction is committed.  The dquot must
  70  * already be associated with the given transaction.
  71  * Note that it marks the entire transaction as dirty. In the ordinary
  72  * case, this gets called via xfs_trans_commit, after the transaction
  73  * is already dirty. However, there's nothing stop this from getting
  74  * called directly, as done by xfs_qm_scall_setqlim. Hence, the TRANS_DIRTY
  75  * flag.
  76  */
  77 void
  78 xfs_trans_log_dquot(
  79         xfs_trans_t     *tp,
  80         xfs_dquot_t     *dqp)
  81 {
  82         ASSERT(dqp->q_transp == tp);
  83         ASSERT(XFS_DQ_IS_LOCKED(dqp));
  84
  85         tp->t_flags |= XFS_TRANS_DIRTY;
  86         dqp->q_logitem.qli_item.li_desc->lid_flags |= XFS_LID_DIRTY;
  87 }
  88
  89 /*
  90  * Carry forward whatever is left of the quota blk reservation to
  91  * the spanky new transaction
  92  */
  93 void
  94 xfs_trans_dup_dqinfo(
  95         xfs_trans_t     *otp,
  96         xfs_trans_t     *ntp)
  97 {
  98         xfs_dqtrx_t     *oq, *nq;
  99         int             i,j;
 100         xfs_dqtrx_t     *oqa, *nqa;
 101
 102         if (!otp->t_dqinfo)
 103                 return;
 104
 105         xfs_trans_alloc_dqinfo(ntp);
 106         oqa = otp->t_dqinfo->dqa_usrdquots;
 107         nqa = ntp->t_dqinfo->dqa_usrdquots;
 108
 109         /*
 110          * Because the quota blk reservation is carried forward,
 111          * it is also necessary to carry forward the DQ_DIRTY flag.
 112          */
 113         if(otp->t_flags & XFS_TRANS_DQ_DIRTY)
 114                 ntp->t_flags |= XFS_TRANS_DQ_DIRTY;
 115
 116         for (j = 0; j < 2; j++) {
 117                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 118                         if (oqa[i].qt_dquot == NULL)
 119                                 break;
 120                         oq = &oqa[i];
 121                         nq = &nqa[i];
 122
 123                         nq->qt_dquot = oq->qt_dquot;
 124                         nq->qt_bcount_delta = nq->qt_icount_delta = 0;
 125                         nq->qt_rtbcount_delta = 0;
 126
 127                         /*
 128                          * Transfer whatever is left of the reservations.
 129                          */
 130                         nq->qt_blk_res = oq->qt_blk_res - oq->qt_blk_res_used;
 131                         oq->qt_blk_res = oq->qt_blk_res_used;
 132
 133                         nq->qt_rtblk_res = oq->qt_rtblk_res -
 134                                 oq->qt_rtblk_res_used;
 135                         oq->qt_rtblk_res = oq->qt_rtblk_res_used;
 136
 137                         nq->qt_ino_res = oq->qt_ino_res - oq->qt_ino_res_used;
 138                         oq->qt_ino_res = oq->qt_ino_res_used;
 139
 140                 }
 141                 oqa = otp->t_dqinfo->dqa_grpdquots;
 142                 nqa = ntp->t_dqinfo->dqa_grpdquots;
 143         }
 144 }
 145
 146 /*
 147  * Wrap around mod_dquot to account for both user and group quotas.
 148  */
 149 void
 150 xfs_trans_mod_dquot_byino(
 151         xfs_trans_t     *tp,
 152         xfs_inode_t     *ip,
 153         uint            field,
 154         long            delta)
 155 {
 156         xfs_mount_t     *mp = tp->t_mountp;
 157
 158         if (!XFS_IS_QUOTA_RUNNING(mp) ||
 159             !XFS_IS_QUOTA_ON(mp) ||
 160             ip->i_ino == mp->m_sb.sb_uquotino ||
 161             ip->i_ino == mp->m_sb.sb_gquotino)
 162                 return;
 163
 164         if (tp->t_dqinfo == NULL)
 165                 xfs_trans_alloc_dqinfo(tp);
 166
 167         if (XFS_IS_UQUOTA_ON(mp) && ip->i_udquot)
 168                 (void) xfs_trans_mod_dquot(tp, ip->i_udquot, field, delta);
 169         if (XFS_IS_OQUOTA_ON(mp) && ip->i_gdquot)
 170                 (void) xfs_trans_mod_dquot(tp, ip->i_gdquot, field, delta);
 171 }
 172
 173 STATIC xfs_dqtrx_t *
 174 xfs_trans_get_dqtrx(
 175         xfs_trans_t     *tp,
 176         xfs_dquot_t     *dqp)
 177 {
 178         int             i;
 179         xfs_dqtrx_t     *qa;
 180
 181         qa = XFS_QM_ISUDQ(dqp) ?
 182                 tp->t_dqinfo->dqa_usrdquots : tp->t_dqinfo->dqa_grpdquots;
 183
 184         for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 185                 if (qa[i].qt_dquot == NULL ||
 186                     qa[i].qt_dquot == dqp)
 187                         return &qa[i];
 188         }
 189
 190         return NULL;
 191 }
 192
 193 /*
 194  * Make the changes in the transaction structure.
 195  * The moral equivalent to xfs_trans_mod_sb().
 196  * We don't touch any fields in the dquot, so we don't care
 197  * if it's locked or not (most of the time it won't be).
 198  */
 199 void
 200 xfs_trans_mod_dquot(
 201         xfs_trans_t     *tp,
 202         xfs_dquot_t     *dqp,
 203         uint            field,
 204         long            delta)
 205 {
 206         xfs_dqtrx_t     *qtrx;
 207
 208         ASSERT(tp);
 209         ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
 210         qtrx = NULL;
 211
 212         if (tp->t_dqinfo == NULL)
 213                 xfs_trans_alloc_dqinfo(tp);
 214         /*
 215          * Find either the first free slot or the slot that belongs
 216          * to this dquot.
 217          */
 218         qtrx = xfs_trans_get_dqtrx(tp, dqp);
 219         ASSERT(qtrx);
 220         if (qtrx->qt_dquot == NULL)
 221                 qtrx->qt_dquot = dqp;
 222
 223         switch (field) {
 224
 225                 /*
 226                  * regular disk blk reservation
 227                  */
 228               case XFS_TRANS_DQ_RES_BLKS:
 229                 qtrx->qt_blk_res += (ulong)delta;
 230                 break;
 231
 232                 /*
 233                  * inode reservation
 234                  */
 235               case XFS_TRANS_DQ_RES_INOS:
 236                 qtrx->qt_ino_res += (ulong)delta;
 237                 break;
 238
 239                 /*
 240                  * disk blocks used.
 241                  */
 242               case XFS_TRANS_DQ_BCOUNT:
 243                 if (qtrx->qt_blk_res && delta > 0) {
 244                         qtrx->qt_blk_res_used += (ulong)delta;
 245                         ASSERT(qtrx->qt_blk_res >= qtrx->qt_blk_res_used);
 246                 }
 247                 qtrx->qt_bcount_delta += delta;
 248                 break;
 249
 250               case XFS_TRANS_DQ_DELBCOUNT:
 251                 qtrx->qt_delbcnt_delta += delta;
 252                 break;
 253
 254                 /*
 255                  * Inode Count
 256                  */
 257               case XFS_TRANS_DQ_ICOUNT:
 258                 if (qtrx->qt_ino_res && delta > 0) {
 259                         qtrx->qt_ino_res_used += (ulong)delta;
 260                         ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
 261                 }
 262                 qtrx->qt_icount_delta += delta;
 263                 break;
 264
 265                 /*
 266                  * rtblk reservation
 267                  */
 268               case XFS_TRANS_DQ_RES_RTBLKS:
 269                 qtrx->qt_rtblk_res += (ulong)delta;
 270                 break;
 271
 272                 /*
 273                  * rtblk count
 274                  */
 275               case XFS_TRANS_DQ_RTBCOUNT:
 276                 if (qtrx->qt_rtblk_res && delta > 0) {
 277                         qtrx->qt_rtblk_res_used += (ulong)delta;
 278                         ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
 279                 }
 280                 qtrx->qt_rtbcount_delta += delta;
 281                 break;
 282
 283               case XFS_TRANS_DQ_DELRTBCOUNT:
 284                 qtrx->qt_delrtb_delta += delta;
 285                 break;
 286
 287               default:
 288                 ASSERT(0);
 289         }
 290         tp->t_flags |= XFS_TRANS_DQ_DIRTY;
 291 }
 292
 293
 294 /*
 295  * Given an array of dqtrx structures, lock all the dquots associated
 296  * and join them to the transaction, provided they have been modified.
 297  * We know that the highest number of dquots (of one type - usr OR grp),
 298  * involved in a transaction is 2 and that both usr and grp combined - 3.
 299  * So, we don't attempt to make this very generic.
 300  */
 301 STATIC void
 302 xfs_trans_dqlockedjoin(
 303         xfs_trans_t     *tp,
 304         xfs_dqtrx_t     *q)
 305 {
 306         ASSERT(q[0].qt_dquot != NULL);
 307         if (q[1].qt_dquot == NULL) {
 308                 xfs_dqlock(q[0].qt_dquot);
 309                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 310         } else {
 311                 ASSERT(XFS_QM_TRANS_MAXDQS == 2);
 312                 xfs_dqlock2(q[0].qt_dquot, q[1].qt_dquot);
 313                 xfs_trans_dqjoin(tp, q[0].qt_dquot);
 314                 xfs_trans_dqjoin(tp, q[1].qt_dquot);
 315         }
 316 }
 317
 318
 319 /*
 320  * Called by xfs_trans_commit() and similar in spirit to
 321  * xfs_trans_apply_sb_deltas().
 322  * Go thru all the dquots belonging to this transaction and modify the
 323  * INCORE dquot to reflect the actual usages.
 324  * Unreserve just the reservations done by this transaction.
 325  * dquot is still left locked at exit.
 326  */
 327 void
 328 xfs_trans_apply_dquot_deltas(
 329         struct xfs_trans        *tp)
 330 {
 331         int                     i, j;
 332         struct xfs_dquot        *dqp;
 333         struct xfs_dqtrx        *qtrx, *qa;
 334         struct xfs_disk_dquot   *d;
 335         long                    totalbdelta;
 336         long                    totalrtbdelta;
 337
 338         if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 339                 return;
 340
 341         ASSERT(tp->t_dqinfo);
 342         qa = tp->t_dqinfo->dqa_usrdquots;
 343         for (j = 0; j < 2; j++) {
 344                 if (qa[0].qt_dquot == NULL) {
 345                         qa = tp->t_dqinfo->dqa_grpdquots;
 346                         continue;
 347                 }
 348
 349                 /*
 350                  * Lock all of the dquots and join them to the transaction.
 351                  */
 352                 xfs_trans_dqlockedjoin(tp, qa);
 353
 354                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 355                         qtrx = &qa[i];
 356                         /*
 357                          * The array of dquots is filled
 358                          * sequentially, not sparsely.
 359                          */
 360                         if ((dqp = qtrx->qt_dquot) == NULL)
 361                                 break;
 362
 363                         ASSERT(XFS_DQ_IS_LOCKED(dqp));
 364                         ASSERT(dqp->q_transp == tp);
 365
 366                         /*
 367                          * adjust the actual number of blocks used
 368                          */
 369                         d = &dqp->q_core;
 370
 371                         /*
 372                          * The issue here is - sometimes we don't make a blkquota
 373                          * reservation intentionally to be fair to users
 374                          * (when the amount is small). On the other hand,
 375                          * delayed allocs do make reservations, but that's
 376                          * outside of a transaction, so we have no
 377                          * idea how much was really reserved.
 378                          * So, here we've accumulated delayed allocation blks and
 379                          * non-delay blks. The assumption is that the
 380                          * delayed ones are always reserved (outside of a
 381                          * transaction), and the others may or may not have
 382                          * quota reservations.
 383                          */
 384                         totalbdelta = qtrx->qt_bcount_delta +
 385                                 qtrx->qt_delbcnt_delta;
 386                         totalrtbdelta = qtrx->qt_rtbcount_delta +
 387                                 qtrx->qt_delrtb_delta;
 388 #ifdef DEBUG
 389                         if (totalbdelta < 0)
 390                                 ASSERT(be64_to_cpu(d->d_bcount) >=
 391                                        -totalbdelta);
 392
 393                         if (totalrtbdelta < 0)
 394                                 ASSERT(be64_to_cpu(d->d_rtbcount) >=
 395                                        -totalrtbdelta);
 396
 397                         if (qtrx->qt_icount_delta < 0)
 398                                 ASSERT(be64_to_cpu(d->d_icount) >=
 399                                        -qtrx->qt_icount_delta);
 400 #endif
 401                         if (totalbdelta)
 402                                 be64_add_cpu(&d->d_bcount, (xfs_qcnt_t)totalbdelta);
 403
 404                         if (qtrx->qt_icount_delta)
 405                                 be64_add_cpu(&d->d_icount, (xfs_qcnt_t)qtrx->qt_icount_delta);
 406
 407                         if (totalrtbdelta)
 408                                 be64_add_cpu(&d->d_rtbcount, (xfs_qcnt_t)totalrtbdelta);
 409
 410                         /*
 411                          * Get any default limits in use.
 412                          * Start/reset the timer(s) if needed.
 413                          */
 414                         if (d->d_id) {
 415                                 xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
 416                                 xfs_qm_adjust_dqtimers(tp->t_mountp, d);
 417                         }
 418
 419                         dqp->dq_flags |= XFS_DQ_DIRTY;
 420                         /*
 421                          * add this to the list of items to get logged
 422                          */
 423                         xfs_trans_log_dquot(tp, dqp);
 424                         /*
 425                          * Take off what's left of the original reservation.
 426                          * In case of delayed allocations, there's no
 427                          * reservation that a transaction structure knows of.
 428                          */
 429                         if (qtrx->qt_blk_res != 0) {
 430                                 if (qtrx->qt_blk_res != qtrx->qt_blk_res_used) {
 431                                         if (qtrx->qt_blk_res >
 432                                             qtrx->qt_blk_res_used)
 433                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 434                                                         (qtrx->qt_blk_res -
 435                                                          qtrx->qt_blk_res_used);
 436                                         else
 437                                                 dqp->q_res_bcount -= (xfs_qcnt_t)
 438                                                         (qtrx->qt_blk_res_used -
 439                                                          qtrx->qt_blk_res);
 440                                 }
 441                         } else {
 442                                 /*
 443                                  * These blks were never reserved, either inside
 444                                  * a transaction or outside one (in a delayed
 445                                  * allocation). Also, this isn't always a
 446                                  * negative number since we sometimes
 447                                  * deliberately skip quota reservations.
 448                                  */
 449                                 if (qtrx->qt_bcount_delta) {
 450                                         dqp->q_res_bcount +=
 451                                               (xfs_qcnt_t)qtrx->qt_bcount_delta;
 452                                 }
 453                         }
 454                         /*
 455                          * Adjust the RT reservation.
 456                          */
 457                         if (qtrx->qt_rtblk_res != 0) {
 458                                 if (qtrx->qt_rtblk_res != qtrx->qt_rtblk_res_used) {
 459                                         if (qtrx->qt_rtblk_res >
 460                                             qtrx->qt_rtblk_res_used)
 461                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 462                                                        (qtrx->qt_rtblk_res -
 463                                                         qtrx->qt_rtblk_res_used);
 464                                         else
 465                                                dqp->q_res_rtbcount -= (xfs_qcnt_t)
 466                                                        (qtrx->qt_rtblk_res_used -
 467                                                         qtrx->qt_rtblk_res);
 468                                 }
 469                         } else {
 470                                 if (qtrx->qt_rtbcount_delta)
 471                                         dqp->q_res_rtbcount +=
 472                                             (xfs_qcnt_t)qtrx->qt_rtbcount_delta;
 473                         }
 474
 475                         /*
 476                          * Adjust the inode reservation.
 477                          */
 478                         if (qtrx->qt_ino_res != 0) {
 479                                 ASSERT(qtrx->qt_ino_res >=
 480                                        qtrx->qt_ino_res_used);
 481                                 if (qtrx->qt_ino_res > qtrx->qt_ino_res_used)
 482                                         dqp->q_res_icount -= (xfs_qcnt_t)
 483                                                 (qtrx->qt_ino_res -
 484                                                  qtrx->qt_ino_res_used);
 485                         } else {
 486                                 if (qtrx->qt_icount_delta)
 487                                         dqp->q_res_icount +=
 488                                             (xfs_qcnt_t)qtrx->qt_icount_delta;
 489                         }
 490
 491                         ASSERT(dqp->q_res_bcount >=
 492                                 be64_to_cpu(dqp->q_core.d_bcount));
 493                         ASSERT(dqp->q_res_icount >=
 494                                 be64_to_cpu(dqp->q_core.d_icount));
 495                         ASSERT(dqp->q_res_rtbcount >=
 496                                 be64_to_cpu(dqp->q_core.d_rtbcount));
 497                 }
 498                 /*
 499                  * Do the group quotas next
 500                  */
 501                 qa = tp->t_dqinfo->dqa_grpdquots;
 502         }
 503 }
 504
 505 /*
 506  * Release the reservations, and adjust the dquots accordingly.
 507  * This is called only when the transaction is being aborted. If by
 508  * any chance we have done dquot modifications incore (ie. deltas) already,
 509  * we simply throw those away, since that's the expected behavior
 510  * when a transaction is curtailed without a commit.
 511  */
 512 void
 513 xfs_trans_unreserve_and_mod_dquots(
 514         xfs_trans_t             *tp)
 515 {
 516         int                     i, j;
 517         xfs_dquot_t             *dqp;
 518         xfs_dqtrx_t             *qtrx, *qa;
 519         bool                    locked;
 520
 521         if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 522                 return;
 523
 524         qa = tp->t_dqinfo->dqa_usrdquots;
 525
 526         for (j = 0; j < 2; j++) {
 527                 for (i = 0; i < XFS_QM_TRANS_MAXDQS; i++) {
 528                         qtrx = &qa[i];
 529                         /*
 530                          * We assume that the array of dquots is filled
 531                          * sequentially, not sparsely.
 532                          */
 533                         if ((dqp = qtrx->qt_dquot) == NULL)
 534                                 break;
 535                         /*
 536                          * Unreserve the original reservation. We don't care
 537                          * about the number of blocks used field, or deltas.
 538                          * Also we don't bother to zero the fields.
 539                          */
 540                         locked = false;
 541                         if (qtrx->qt_blk_res) {
 542                                 xfs_dqlock(dqp);
 543                                 locked = true;
 544                                 dqp->q_res_bcount -=
 545                                         (xfs_qcnt_t)qtrx->qt_blk_res;
 546                         }
 547                         if (qtrx->qt_ino_res) {
 548                                 if (!locked) {
 549                                         xfs_dqlock(dqp);
 550                                         locked = true;
 551                                 }
 552                                 dqp->q_res_icount -=
 553                                         (xfs_qcnt_t)qtrx->qt_ino_res;
 554                         }
 555
 556                         if (qtrx->qt_rtblk_res) {
 557                                 if (!locked) {
 558                                         xfs_dqlock(dqp);
 559                                         locked = true;
 560                                 }
 561                                 dqp->q_res_rtbcount -=
 562                                         (xfs_qcnt_t)qtrx->qt_rtblk_res;
 563                         }
 564                         if (locked)
 565                                 xfs_dqunlock(dqp);
 566
 567                 }
 568                 qa = tp->t_dqinfo->dqa_grpdquots;
 569         }
 570 }
 571
 572 STATIC void
 573 xfs_quota_warn(
 574         struct xfs_mount        *mp,
 575         struct xfs_dquot        *dqp,
 576         int                     type)
 577 {
 578         /* no warnings for project quotas - we just return ENOSPC later */
 579         if (dqp->dq_flags & XFS_DQ_PROJ)
 580                 return;
 581         quota_send_warning(make_kqid(&init_user_ns,
 582                                      (dqp->dq_flags & XFS_DQ_USER) ?
 583                                      USRQUOTA : GRPQUOTA,
 584                                      be32_to_cpu(dqp->q_core.d_id)),
 585                            mp->m_super->s_dev, type);
 586 }
 587
 588 /*
 589  * This reserves disk blocks and inodes against a dquot.
 590  * Flags indicate if the dquot is to be locked here and also
 591  * if the blk reservation is for RT or regular blocks.
 592  * Sending in XFS_QMOPT_FORCE_RES flag skips the quota check.
 593  */
 594 STATIC int
 595 xfs_trans_dqresv(
 596         xfs_trans_t     *tp,
 597         xfs_mount_t     *mp,
 598         xfs_dquot_t     *dqp,
 599         long            nblks,
 600         long            ninos,
 601         uint            flags)
 602 {
 603         xfs_qcnt_t      hardlimit;
 604         xfs_qcnt_t      softlimit;
 605         time_t          timer;
 606         xfs_qwarncnt_t  warns;
 607         xfs_qwarncnt_t  warnlimit;
 608         xfs_qcnt_t      total_count;
 609         xfs_qcnt_t      *resbcountp;
 610         xfs_quotainfo_t *q = mp->m_quotainfo;
 611
 612
 613         xfs_dqlock(dqp);
 614
 615         if (flags & XFS_TRANS_DQ_RES_BLKS) {
 616                 hardlimit = be64_to_cpu(dqp->q_core.d_blk_hardlimit);
 617                 if (!hardlimit)
 618                         hardlimit = q->qi_bhardlimit;
 619                 softlimit = be64_to_cpu(dqp->q_core.d_blk_softlimit);
 620                 if (!softlimit)
 621                         softlimit = q->qi_bsoftlimit;
 622                 timer = be32_to_cpu(dqp->q_core.d_btimer);
 623                 warns = be16_to_cpu(dqp->q_core.d_bwarns);
 624                 warnlimit = dqp->q_mount->m_quotainfo->qi_bwarnlimit;
 625                 resbcountp = &dqp->q_res_bcount;
 626         } else {
 627                 ASSERT(flags & XFS_TRANS_DQ_RES_RTBLKS);
 628                 hardlimit = be64_to_cpu(dqp->q_core.d_rtb_hardlimit);
 629                 if (!hardlimit)
 630                         hardlimit = q->qi_rtbhardlimit;
 631                 softlimit = be64_to_cpu(dqp->q_core.d_rtb_softlimit);
 632                 if (!softlimit)
 633                         softlimit = q->qi_rtbsoftlimit;
 634                 timer = be32_to_cpu(dqp->q_core.d_rtbtimer);
 635                 warns = be16_to_cpu(dqp->q_core.d_rtbwarns);
 636                 warnlimit = dqp->q_mount->m_quotainfo->qi_rtbwarnlimit;
 637                 resbcountp = &dqp->q_res_rtbcount;
 638         }
 639
 640         if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
 641             dqp->q_core.d_id &&
 642             ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
 643              (XFS_IS_OQUOTA_ENFORCED(dqp->q_mount) &&
 644               (XFS_QM_ISPDQ(dqp) || XFS_QM_ISGDQ(dqp))))) {
 645                 if (nblks > 0) {
 646                         /*
 647                          * dquot is locked already. See if we'd go over the
 648                          * hardlimit or exceed the timelimit if we allocate
 649                          * nblks.
 650                          */
 651                         total_count = *resbcountp + nblks;
 652                         if (hardlimit && total_count > hardlimit) {
 653                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BHARDWARN);
 654                                 goto error_return;
 655                         }
 656                         if (softlimit && total_count > softlimit) {
 657                                 if ((timer != 0 && get_seconds() > timer) ||
 658                                     (warns != 0 && warns >= warnlimit)) {
 659                                         xfs_quota_warn(mp, dqp,
 660                                                        QUOTA_NL_BSOFTLONGWARN);
 661                                         goto error_return;
 662                                 }
 663
 664                                 xfs_quota_warn(mp, dqp, QUOTA_NL_BSOFTWARN);
 665                         }
 666                 }
 667                 if (ninos > 0) {
 668                         total_count = be64_to_cpu(dqp->q_core.d_icount) + ninos;
 669                         timer = be32_to_cpu(dqp->q_core.d_itimer);
 670                         warns = be16_to_cpu(dqp->q_core.d_iwarns);
 671                         warnlimit = dqp->q_mount->m_quotainfo->qi_iwarnlimit;
 672                         hardlimit = be64_to_cpu(dqp->q_core.d_ino_hardlimit);
 673                         if (!hardlimit)
 674                                 hardlimit = q->qi_ihardlimit;
 675                         softlimit = be64_to_cpu(dqp->q_core.d_ino_softlimit);
 676                         if (!softlimit)
 677                                 softlimit = q->qi_isoftlimit;
 678
 679                         if (hardlimit && total_count > hardlimit) {
 680                                 xfs_quota_warn(mp, dqp, QUOTA_NL_IHARDWARN);
 681                                 goto error_return;
 682                         }
 683                         if (softlimit && total_count > softlimit) {
 684                                 if  ((timer != 0 && get_seconds() > timer) ||
 685                                      (warns != 0 && warns >= warnlimit)) {
 686                                         xfs_quota_warn(mp, dqp,
 687                                                        QUOTA_NL_ISOFTLONGWARN);
 688                                         goto error_return;
 689                                 }
 690                                 xfs_quota_warn(mp, dqp, QUOTA_NL_ISOFTWARN);
 691                         }
 692                 }
 693         }
 694
 695         /*
 696          * Change the reservation, but not the actual usage.
 697          * Note that q_res_bcount = q_core.d_bcount + resv
 698          */
 699         (*resbcountp) += (xfs_qcnt_t)nblks;
 700         if (ninos != 0)
 701                 dqp->q_res_icount += (xfs_qcnt_t)ninos;
 702
 703         /*
 704          * note the reservation amt in the trans struct too,
 705          * so that the transaction knows how much was reserved by
 706          * it against this particular dquot.
 707          * We don't do this when we are reserving for a delayed allocation,
 708          * because we don't have the luxury of a transaction envelope then.
 709          */
 710         if (tp) {
 711                 ASSERT(tp->t_dqinfo);
 712                 ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 713                 if (nblks != 0)
 714                         xfs_trans_mod_dquot(tp, dqp,
 715                                             flags & XFS_QMOPT_RESBLK_MASK,
 716                                             nblks);
 717                 if (ninos != 0)
 718                         xfs_trans_mod_dquot(tp, dqp,
 719                                             XFS_TRANS_DQ_RES_INOS,
 720                                             ninos);
 721         }
 722         ASSERT(dqp->q_res_bcount >= be64_to_cpu(dqp->q_core.d_bcount));
 723         ASSERT(dqp->q_res_rtbcount >= be64_to_cpu(dqp->q_core.d_rtbcount));
 724         ASSERT(dqp->q_res_icount >= be64_to_cpu(dqp->q_core.d_icount));
 725
 726         xfs_dqunlock(dqp);
 727         return 0;
 728
 729 error_return:
 730         xfs_dqunlock(dqp);
 731         if (flags & XFS_QMOPT_ENOSPC)
 732                 return ENOSPC;
 733         return EDQUOT;
 734 }
 735
 736
 737 /*
 738  * Given dquot(s), make disk block and/or inode reservations against them.
 739  * The fact that this does the reservation against both the usr and
 740  * grp/prj quotas is important, because this follows a both-or-nothing
 741  * approach.
 742  *
 743  * flags = XFS_QMOPT_FORCE_RES evades limit enforcement. Used by chown.
 744  *         XFS_QMOPT_ENOSPC returns ENOSPC not EDQUOT.  Used by pquota.
 745  *         XFS_TRANS_DQ_RES_BLKS reserves regular disk blocks
 746  *         XFS_TRANS_DQ_RES_RTBLKS reserves realtime disk blocks
 747  * dquots are unlocked on return, if they were not locked by caller.
 748  */
 749 int
 750 xfs_trans_reserve_quota_bydquots(
 751         xfs_trans_t     *tp,
 752         xfs_mount_t     *mp,
 753         xfs_dquot_t     *udqp,
 754         xfs_dquot_t     *gdqp,
 755         long            nblks,
 756         long            ninos,
 757         uint            flags)
 758 {
 759         int             resvd = 0, error;
 760
 761         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 762                 return 0;
 763
 764         if (tp && tp->t_dqinfo == NULL)
 765                 xfs_trans_alloc_dqinfo(tp);
 766
 767         ASSERT(flags & XFS_QMOPT_RESBLK_MASK);
 768
 769         if (udqp) {
 770                 error = xfs_trans_dqresv(tp, mp, udqp, nblks, ninos,
 771                                         (flags & ~XFS_QMOPT_ENOSPC));
 772                 if (error)
 773                         return error;
 774                 resvd = 1;
 775         }
 776
 777         if (gdqp) {
 778                 error = xfs_trans_dqresv(tp, mp, gdqp, nblks, ninos, flags);
 779                 if (error) {
 780                         /*
 781                          * can't do it, so backout previous reservation
 782                          */
 783                         if (resvd) {
 784                                 flags |= XFS_QMOPT_FORCE_RES;
 785                                 xfs_trans_dqresv(tp, mp, udqp,
 786                                                  -nblks, -ninos, flags);
 787                         }
 788                         return error;
 789                 }
 790         }
 791
 792         /*
 793          * Didn't change anything critical, so, no need to log
 794          */
 795         return 0;
 796 }
 797
 798
 799 /*
 800  * Lock the dquot and change the reservation if we can.
 801  * This doesn't change the actual usage, just the reservation.
 802  * The inode sent in is locked.
 803  */
 804 int
 805 xfs_trans_reserve_quota_nblks(
 806         struct xfs_trans        *tp,
 807         struct xfs_inode        *ip,
 808         long                    nblks,
 809         long                    ninos,
 810         uint                    flags)
 811 {
 812         struct xfs_mount        *mp = ip->i_mount;
 813
 814         if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
 815                 return 0;
 816         if (XFS_IS_PQUOTA_ON(mp))
 817                 flags |= XFS_QMOPT_ENOSPC;
 818
 819         ASSERT(ip->i_ino != mp->m_sb.sb_uquotino);
 820         ASSERT(ip->i_ino != mp->m_sb.sb_gquotino);
 821
 822         ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 823         ASSERT((flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 824                                 XFS_TRANS_DQ_RES_RTBLKS ||
 825                (flags & ~(XFS_QMOPT_FORCE_RES | XFS_QMOPT_ENOSPC)) ==
 826                                 XFS_TRANS_DQ_RES_BLKS);
 827
 828         /*
 829          * Reserve nblks against these dquots, with trans as the mediator.
 830          */
 831         return xfs_trans_reserve_quota_bydquots(tp, mp,
 832                                                 ip->i_udquot, ip->i_gdquot,
 833                                                 nblks, ninos, flags);
 834 }
 835
 836 /*
 837  * This routine is called to allocate a quotaoff log item.
 838  */
 839 xfs_qoff_logitem_t *
 840 xfs_trans_get_qoff_item(
 841         xfs_trans_t             *tp,
 842         xfs_qoff_logitem_t      *startqoff,
 843         uint                    flags)
 844 {
 845         xfs_qoff_logitem_t      *q;
 846
 847         ASSERT(tp != NULL);
 848
 849         q = xfs_qm_qoff_logitem_init(tp->t_mountp, startqoff, flags);
 850         ASSERT(q != NULL);
 851
 852         /*
 853          * Get a log_item_desc to point at the new item.
 854          */
 855         xfs_trans_add_item(tp, &q->qql_item);
 856         return q;
 857 }
 858
 859
 860 /*
 861  * This is called to mark the quotaoff logitem as needing
 862  * to be logged when the transaction is committed.  The logitem must
 863  * already be associated with the given transaction.
 864  */
 865 void
 866 xfs_trans_log_quotaoff_item(
 867         xfs_trans_t             *tp,
 868         xfs_qoff_logitem_t      *qlp)
 869 {
 870         tp->t_flags |= XFS_TRANS_DIRTY;
 871         qlp->qql_item.li_desc->lid_flags |= XFS_LID_DIRTY;
 872 }
 873
 874 STATIC void
 875 xfs_trans_alloc_dqinfo(
 876         xfs_trans_t     *tp)
 877 {
 878         tp->t_dqinfo = kmem_zone_zalloc(xfs_qm_dqtrxzone, KM_SLEEP);
 879 }
 880
 881 void
 882 xfs_trans_free_dqinfo(
 883         xfs_trans_t     *tp)
 884 {
 885         if (!tp->t_dqinfo)
 886                 return;
 887         kmem_zone_free(xfs_qm_dqtrxzone, tp->t_dqinfo);
 888         tp->t_dqinfo = NULL;
 889 }