lustre/osd-ldiskfs/osd_quota.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 021110-1307, USA
  20  *
  21  * GPL HEADER END
  22  */
  23 /*
  24  * Copyright (c) 2012, 2015, Intel Corporation.
  25  * Use is subject to license terms.
  26  *
  27  * Author: Johann Lombardi <johann@whamcloud.com>
  28  * Author: Niu    Yawei    <niu@whamcloud.com>
  29  */
  30
  31 #include <lustre_quota.h>
  32 #include "osd_internal.h"
  33
  34 /**
  35  * Helpers function to find out the quota type (USRQUOTA/GRPQUOTA) of a
  36  * given object
  37  */
  38 static inline int fid2type(const struct lu_fid *fid)
  39 {
  40         LASSERT(fid_is_acct(fid));
  41         switch (fid_oid(fid)) {
  42         case ACCT_USER_OID:
  43                 return USRQUOTA;
  44         case ACCT_GROUP_OID:
  45                 return GRPQUOTA;
  46         }
  47
  48         LASSERTF(0, "invalid fid for quota type: %u", fid_oid(fid));
  49         return USRQUOTA;
  50 }
  51
  52 /**
  53  * Space Accounting Management
  54  */
  55
  56 /**
  57  * Look up an accounting object based on its fid.
  58  *
  59  * \param info - is the osd thread info passed by the caller
  60  * \param osd  - is the osd device
  61  * \param fid  - is the fid of the accounting object we want to look up
  62  * \param id   - is the osd_inode_id struct to fill with the inode number of
  63  *               the quota file if the lookup is successful
  64  */
  65 int osd_acct_obj_lookup(struct osd_thread_info *info, struct osd_device *osd,
  66                         const struct lu_fid *fid, struct osd_inode_id *id)
  67 {
  68         struct super_block *sb = osd_sb(osd);
  69         unsigned long qf_inums[LL_MAXQUOTAS] = {
  70                 le32_to_cpu(LDISKFS_SB(sb)->s_es->s_usr_quota_inum),
  71                 le32_to_cpu(LDISKFS_SB(sb)->s_es->s_grp_quota_inum)
  72         };
  73
  74         ENTRY;
  75         LASSERT(fid_is_acct(fid));
  76
  77         if (!LDISKFS_HAS_RO_COMPAT_FEATURE(sb,
  78                                            LDISKFS_FEATURE_RO_COMPAT_QUOTA))
  79                 RETURN(-ENOENT);
  80
  81         id->oii_gen = OSD_OII_NOGEN;
  82         id->oii_ino = qf_inums[fid2type(fid)];
  83         if (!ldiskfs_valid_inum(sb, id->oii_ino))
  84                 RETURN(-ENOENT);
  85         RETURN(0);
  86 }
  87
  88 /**
  89  * Return space usage (#blocks & #inodes) consumed by a given uid or gid.
  90  *
  91  * \param env   - is the environment passed by the caller
  92  * \param dtobj - is the accounting object
  93  * \param dtrec - is the record to fill with space usage information
  94  * \param dtkey - is the id of the user or group for which we would
  95  *                like to access disk usage.
  96  *
  97  * \retval +ve - success : exact match
  98  * \retval -ve - failure
  99  */
 100 static int osd_acct_index_lookup(const struct lu_env *env,
 101                                  struct dt_object *dtobj,
 102                                  struct dt_rec *dtrec,
 103                                  const struct dt_key *dtkey)
 104 {
 105         struct osd_thread_info  *info = osd_oti_get(env);
 106 #if defined(HAVE_DQUOT_QC_DQBLK)
 107         struct qc_dqblk         *dqblk = &info->oti_qdq;
 108 #elif defined(HAVE_DQUOT_FS_DISK_QUOTA)
 109         struct fs_disk_quota    *dqblk = &info->oti_fdq;
 110 #else
 111         struct if_dqblk         *dqblk = &info->oti_dqblk;
 112 #endif
 113         struct super_block      *sb = osd_sb(osd_obj2dev(osd_dt_obj(dtobj)));
 114         struct lquota_acct_rec  *rec = (struct lquota_acct_rec *)dtrec;
 115         __u64                    id = *((__u64 *)dtkey);
 116         int                      rc;
 117 #ifdef HAVE_DQUOT_KQID
 118         struct kqid              qid;
 119 #endif
 120         int type;
 121
 122         ENTRY;
 123
 124         type = fid2type(lu_object_fid(&dtobj->do_lu));
 125         memset(dqblk, 0, sizeof(*dqblk));
 126 #ifdef HAVE_DQUOT_KQID
 127         qid = make_kqid(&init_user_ns, type, id);
 128         rc = sb->s_qcop->get_dqblk(sb, qid, dqblk);
 129 #else
 130         rc = sb->s_qcop->get_dqblk(sb, type, (qid_t) id, dqblk);
 131 #endif
 132         if (rc)
 133                 RETURN(rc);
 134 #if defined(HAVE_DQUOT_QC_DQBLK)
 135         rec->bspace = dqblk->d_space;
 136         rec->ispace = dqblk->d_ino_count;
 137 #elif defined(HAVE_DQUOT_FS_DISK_QUOTA)
 138         rec->bspace = dqblk->d_bcount;
 139         rec->ispace = dqblk->d_icount;
 140 #else
 141         rec->bspace = dqblk->dqb_curspace;
 142         rec->ispace = dqblk->dqb_curinodes;
 143 #endif
 144         RETURN(+1);
 145 }
 146
 147 #define QUOTA_IT_READ_ERROR(it, rc)                                    \
 148         CERROR("%s: Error while trying to read quota information, "    \
 149                "failed with %d\n",                                     \
 150                osd_dev(it->oiq_obj->oo_dt.do_lu.lo_dev)->od_svname, rc); \
 151
 152 /**
 153  * Initialize osd Iterator for given osd index object.
 154  *
 155  * \param  dt    - osd index object
 156  * \param  attr  - not used
 157  */
 158 static struct dt_it *osd_it_acct_init(const struct lu_env *env,
 159                                       struct dt_object *dt,
 160                                       __u32 attr)
 161 {
 162         struct osd_it_quota     *it;
 163         struct lu_object        *lo = &dt->do_lu;
 164         struct osd_object       *obj = osd_dt_obj(dt);
 165
 166         ENTRY;
 167
 168         LASSERT(lu_object_exists(lo));
 169
 170         OBD_ALLOC_PTR(it);
 171         if (it == NULL)
 172                 RETURN(ERR_PTR(-ENOMEM));
 173
 174         lu_object_get(lo);
 175         it->oiq_obj = obj;
 176         INIT_LIST_HEAD(&it->oiq_list);
 177
 178         /* LUSTRE_DQTREEOFF is the initial offset where the tree can be found */
 179         it->oiq_blk[0] = LUSTRE_DQTREEOFF;
 180
 181         /* NB: we don't need to store the tree depth since it is always
 182          * equal to LUSTRE_DQTREEDEPTH - 1 (root has depth = 0) for a leaf
 183          * block. */
 184         RETURN((struct dt_it *)it);
 185 }
 186
 187 /**
 188  * Free given iterator.
 189  *
 190  * \param  di   - osd iterator
 191  */
 192 static void osd_it_acct_fini(const struct lu_env *env, struct dt_it *di)
 193 {
 194         struct osd_it_quota *it = (struct osd_it_quota *)di;
 195         struct osd_quota_leaf *leaf, *tmp;
 196         ENTRY;
 197
 198         osd_object_put(env, it->oiq_obj);
 199
 200         list_for_each_entry_safe(leaf, tmp, &it->oiq_list, oql_link) {
 201                 list_del_init(&leaf->oql_link);
 202                 OBD_FREE_PTR(leaf);
 203         }
 204
 205         OBD_FREE_PTR(it);
 206
 207         EXIT;
 208 }
 209
 210 /**
 211  * Move Iterator to record specified by \a key, if the \a key isn't found,
 212  * move to the first valid record.
 213  *
 214  * \param  di   - osd iterator
 215  * \param  key  - uid or gid
 216  *
 217  * \retval +ve  - di points to the first valid record
 218  * \retval  +1  - di points to exact matched key
 219  * \retval -ve  - failure
 220  */
 221 static int osd_it_acct_get(const struct lu_env *env, struct dt_it *di,
 222                            const struct dt_key *key)
 223 {
 224         struct osd_it_quota     *it = (struct osd_it_quota *)di;
 225         const struct lu_fid     *fid =
 226                                 lu_object_fid(&it->oiq_obj->oo_dt.do_lu);
 227         int                      type;
 228         qid_t                    dqid = *(qid_t *)key;
 229         loff_t                   offset;
 230         int                      rc;
 231
 232         ENTRY;
 233         type = fid2type(fid);
 234
 235         offset = find_tree_dqentry(env, it->oiq_obj, type, dqid,
 236                                    LUSTRE_DQTREEOFF, 0, it);
 237         if (offset > 0) { /* Found */
 238                 RETURN(+1);
 239         } else if (offset < 0) { /* Error */
 240                 QUOTA_IT_READ_ERROR(it, (int)offset);
 241                 RETURN((int)offset);
 242         }
 243
 244         /* The @key is not found, move to the first valid entry */
 245         rc = walk_tree_dqentry(env, it->oiq_obj, type, it->oiq_blk[0], 0,
 246                                0, it);
 247         if (rc == 0)
 248                 rc = 1;
 249         else if (rc > 0)
 250                 rc = -ENOENT;
 251
 252         RETURN(rc);
 253 }
 254
 255 /**
 256  * Release Iterator
 257  *
 258  * \param  di   - osd iterator
 259  */
 260 static void osd_it_acct_put(const struct lu_env *env, struct dt_it *di)
 261 {
 262         return;
 263 }
 264
 265 static int osd_it_add_processed(struct osd_it_quota *it, int depth)
 266 {
 267         struct osd_quota_leaf *leaf;
 268
 269         OBD_ALLOC_PTR(leaf);
 270         if (leaf == NULL)
 271                 RETURN(-ENOMEM);
 272         INIT_LIST_HEAD(&leaf->oql_link);
 273         leaf->oql_blk = it->oiq_blk[depth];
 274         list_add_tail(&leaf->oql_link, &it->oiq_list);
 275         RETURN(0);
 276 }
 277
 278 /**
 279  * Move on to the next valid entry.
 280  *
 281  * \param  di   - osd iterator
 282  *
 283  * \retval +ve  - iterator reached the end
 284  * \retval   0  - iterator has not reached the end yet
 285  * \retval -ve  - unexpected failure
 286  */
 287 static int osd_it_acct_next(const struct lu_env *env, struct dt_it *di)
 288 {
 289         struct osd_it_quota     *it = (struct osd_it_quota *)di;
 290         const struct lu_fid     *fid =
 291                                 lu_object_fid(&it->oiq_obj->oo_dt.do_lu);
 292         int                      type;
 293         int                      depth, rc;
 294         uint                     index;
 295
 296         ENTRY;
 297
 298         type = fid2type(fid);
 299
 300         /* Let's first check if there are any remaining valid entry in the
 301          * current leaf block. Start with the next entry after the current one.
 302          */
 303         depth = LUSTRE_DQTREEDEPTH;
 304         index = it->oiq_index[depth];
 305         if (++index < LUSTRE_DQSTRINBLK) {
 306                 /* Search for the next valid entry from current index */
 307                 rc = walk_block_dqentry(env, it->oiq_obj, type,
 308                                         it->oiq_blk[depth], index, it);
 309                 if (rc < 0) {
 310                         QUOTA_IT_READ_ERROR(it, rc);
 311                         RETURN(rc);
 312                 } else if (rc == 0) {
 313                         /* Found on entry, @it is already updated to the
 314                          * new position in walk_block_dqentry(). */
 315                         RETURN(0);
 316                 } else {
 317                         rc = osd_it_add_processed(it, depth);
 318                         if (rc)
 319                                 RETURN(rc);
 320                 }
 321         } else {
 322                 rc = osd_it_add_processed(it, depth);
 323                 if (rc)
 324                         RETURN(rc);
 325         }
 326         rc = 1;
 327
 328         /* We have consumed all the entries of the current leaf block, move on
 329          * to the next one. */
 330         depth--;
 331
 332         /* We keep searching as long as walk_tree_dqentry() returns +1
 333          * (= no valid entry found). */
 334         for (; depth >= 0 && rc > 0; depth--) {
 335                 index = it->oiq_index[depth];
 336                 if (++index > 0xff)
 337                         continue;
 338                 rc = walk_tree_dqentry(env, it->oiq_obj, type,
 339                                        it->oiq_blk[depth], depth, index, it);
 340         }
 341
 342         if (rc < 0)
 343                 QUOTA_IT_READ_ERROR(it, rc);
 344         RETURN(rc);
 345 }
 346
 347 /**
 348  * Return pointer to the key under iterator.
 349  *
 350  * \param  di   - osd iterator
 351  */
 352 static struct dt_key *osd_it_acct_key(const struct lu_env *env,
 353                                       const struct dt_it *di)
 354 {
 355         struct osd_it_quota *it = (struct osd_it_quota *)di;
 356
 357         ENTRY;
 358         RETURN((struct dt_key *)&it->oiq_id);
 359 }
 360
 361 /**
 362  * Return size of key under iterator (in bytes)
 363  *
 364  * \param  di   - osd iterator
 365  */
 366 static int osd_it_acct_key_size(const struct lu_env *env,
 367                                 const struct dt_it *di)
 368 {
 369         struct osd_it_quota *it = (struct osd_it_quota *)di;
 370
 371         ENTRY;
 372         RETURN((int)sizeof(it->oiq_id));
 373 }
 374
 375 /**
 376  * Return pointer to the record under iterator.
 377  *
 378  * \param  di    - osd iterator
 379  * \param  attr  - not used
 380  */
 381 static int osd_it_acct_rec(const struct lu_env *env,
 382                            const struct dt_it *di,
 383                            struct dt_rec *dtrec, __u32 attr)
 384 {
 385         struct osd_it_quota     *it = (struct osd_it_quota *)di;
 386         const struct dt_key     *key = osd_it_acct_key(env, di);
 387         int                      rc;
 388
 389         ENTRY;
 390
 391         rc = osd_acct_index_lookup(env, &it->oiq_obj->oo_dt, dtrec, key);
 392         RETURN(rc > 0 ? 0 : rc);
 393 }
 394
 395 /**
 396  * Returns cookie for current Iterator position.
 397  *
 398  * \param  di    - osd iterator
 399  */
 400 static __u64 osd_it_acct_store(const struct lu_env *env,
 401                                const struct dt_it *di)
 402 {
 403         struct osd_it_quota *it = (struct osd_it_quota *)di;
 404
 405         ENTRY;
 406         RETURN(it->oiq_id);
 407 }
 408
 409 /**
 410  * Restore iterator from cookie. if the \a hash isn't found,
 411  * restore the first valid record.
 412  *
 413  * \param  di    - osd iterator
 414  * \param  hash  - iterator location cookie
 415  *
 416  * \retval +ve   - di points to the first valid record
 417  * \retval  +1   - di points to exact matched hash
 418  * \retval -ve   - failure
 419  */
 420 static int osd_it_acct_load(const struct lu_env *env,
 421                             const struct dt_it *di, __u64 hash)
 422 {
 423         ENTRY;
 424         RETURN(osd_it_acct_get(env, (struct dt_it *)di,
 425                                (const struct dt_key *)&hash));
 426 }
 427
 428 /**
 429  * Index and Iterator operations for accounting objects
 430  */
 431 const struct dt_index_operations osd_acct_index_ops = {
 432         .dio_lookup     = osd_acct_index_lookup,
 433         .dio_it         = {
 434                 .init           = osd_it_acct_init,
 435                 .fini           = osd_it_acct_fini,
 436                 .get            = osd_it_acct_get,
 437                 .put            = osd_it_acct_put,
 438                 .next           = osd_it_acct_next,
 439                 .key            = osd_it_acct_key,
 440                 .key_size       = osd_it_acct_key_size,
 441                 .rec            = osd_it_acct_rec,
 442                 .store          = osd_it_acct_store,
 443                 .load           = osd_it_acct_load
 444         }
 445 };
 446
 447 static inline void osd_quota_swab(char *ptr, size_t size)
 448 {
 449         int offset;
 450
 451         LASSERT((size & (sizeof(__u64) - 1)) == 0);
 452
 453         for (offset = 0; offset < size; offset += sizeof(__u64))
 454              __swab64s((__u64 *)(ptr + offset));
 455 }
 456
 457 const struct dt_rec *osd_quota_pack(struct osd_object *obj,
 458                                     const struct dt_rec *rec,
 459                                     union lquota_rec *quota_rec)
 460 {
 461 #ifdef __BIG_ENDIAN
 462         struct iam_descr        *descr;
 463
 464         LASSERT(obj->oo_dir != NULL);
 465         descr = obj->oo_dir->od_container.ic_descr;
 466
 467         memcpy(quota_rec, rec, descr->id_rec_size);
 468
 469         osd_quota_swab((char *)quota_rec, descr->id_rec_size);
 470         return (const struct dt_rec *)quota_rec;
 471 #else
 472         return rec;
 473 #endif
 474 }
 475
 476 void osd_quota_unpack(struct osd_object *obj, const struct dt_rec *rec)
 477 {
 478 #ifdef __BIG_ENDIAN
 479         struct iam_descr *descr;
 480
 481         LASSERT(obj->oo_dir != NULL);
 482         descr = obj->oo_dir->od_container.ic_descr;
 483
 484         osd_quota_swab((char *)rec, descr->id_rec_size);
 485 #else
 486         return;
 487 #endif
 488 }
 489
 490 static inline int osd_qid_type(struct osd_thandle *oh, int i)
 491 {
 492         return oh->ot_id_types[i];
 493 }
 494
 495 /**
 496  * Reserve journal credits for quota files update first, then call
 497  * ->op_begin() to perform quota enforcement.
 498  *
 499  * \param  env     - the environment passed by the caller
 500  * \param  oh      - osd transaction handle
 501  * \param  qi      - quota id & space required for this operation
 502  * \param  obj     - osd object, could be NULL when it's under create
 503  * \param  enforce - whether to perform quota enforcement
 504  * \param  flags   - if the operation is write, return no user quota, no
 505  *                   group quota, or sync commit flags to the caller
 506  *
 507  * \retval 0       - success
 508  * \retval -ve     - failure
 509  */
 510 int osd_declare_qid(const struct lu_env *env, struct osd_thandle *oh,
 511                     struct lquota_id_info *qi, struct osd_object *obj,
 512                     bool enforce, int *flags)
 513 {
 514         struct osd_device       *dev;
 515         struct qsd_instance     *qsd;
 516         struct inode            *inode = NULL;
 517         int                      i, rc = 0, crd;
 518         bool                     found = false;
 519         ENTRY;
 520
 521         LASSERT(oh != NULL);
 522         LASSERTF(oh->ot_id_cnt <= OSD_MAX_UGID_CNT, "count=%d\n",
 523                  oh->ot_id_cnt);
 524
 525         dev = osd_dt_dev(oh->ot_super.th_dev);
 526         LASSERT(dev != NULL);
 527
 528         qsd = dev->od_quota_slave;
 529
 530         for (i = 0; i < oh->ot_id_cnt; i++) {
 531                 if (oh->ot_id_array[i] == qi->lqi_id.qid_uid &&
 532                     oh->ot_id_types[i] == qi->lqi_type) {
 533                         found = true;
 534                         break;
 535                 }
 536         }
 537
 538         if (!found) {
 539                 /* we need to account for credits for this new ID */
 540                 if (i >= OSD_MAX_UGID_CNT) {
 541                         CERROR("Too many(%d) trans qids!\n", i + 1);
 542                         RETURN(-EOVERFLOW);
 543                 }
 544
 545                 if (obj != NULL)
 546                         inode = obj->oo_inode;
 547
 548                 /* root ID entry should be always present in the quota file */
 549                 if (qi->lqi_id.qid_uid == 0) {
 550                         crd = 1;
 551                 } else {
 552                         /* used space for this ID could be dropped to zero,
 553                          * reserve extra credits for removing ID entry from
 554                          * the quota file */
 555                         if (qi->lqi_space < 0)
 556                                 crd = LDISKFS_QUOTA_DEL_BLOCKS(osd_sb(dev));
 557                         /* reserve credits for adding ID entry to the quota
 558                          * file if the i_dquot isn't initialized yet. */
 559                         else if (inode == NULL ||
 560 #ifdef HAVE_EXT4_INFO_DQUOT
 561                                  LDISKFS_I(inode)->i_dquot[qi->lqi_type] == NULL)
 562 #else
 563                                  inode->i_dquot[qi->lqi_type] == NULL)
 564 #endif
 565                                 crd = LDISKFS_QUOTA_INIT_BLOCKS(osd_sb(dev));
 566                         else
 567                                 crd = 1;
 568                 }
 569
 570                 osd_trans_declare_op(env, oh, OSD_OT_QUOTA, crd);
 571
 572                 oh->ot_id_array[i] = qi->lqi_id.qid_uid;
 573                 oh->ot_id_types[i] = qi->lqi_type;
 574                 oh->ot_id_cnt++;
 575         }
 576
 577         if (unlikely(qsd == NULL))
 578                 /* quota slave instance hasn't been allocated yet */
 579                 RETURN(0);
 580
 581         /* check quota */
 582         if (enforce)
 583                 rc = qsd_op_begin(env, qsd, oh->ot_quota_trans, qi, flags);
 584         RETURN(rc);
 585 }
 586
 587 /**
 588  * Wrapper for osd_declare_qid()
 589  *
 590  * \param  env    - the environment passed by the caller
 591  * \param  uid    - user id of the inode
 592  * \param  gid    - group id of the inode
 593  * \param  space  - how many blocks/inodes will be consumed/released
 594  * \param  oh     - osd transaction handle
 595  * \param  obj    - osd object, could be NULL when it's under create
 596  * \param  is_blk - block quota or inode quota?
 597  * \param  flags  - if the operation is write, return no user quota, no
 598  *                  group quota, or sync commit flags to the caller
 599  * \param force   - set to 1 when changes are performed by root user and thus
 600  *                  can't failed with EDQUOT
 601  *
 602  * \retval 0      - success
 603  * \retval -ve    - failure
 604  */
 605 int osd_declare_inode_qid(const struct lu_env *env, qid_t uid, qid_t gid,
 606                           long long space, struct osd_thandle *oh,
 607                           struct osd_object *obj, bool is_blk, int *flags,
 608                           bool force)
 609 {
 610         struct osd_thread_info  *info = osd_oti_get(env);
 611         struct lquota_id_info   *qi = &info->oti_qi;
 612         int                      rcu, rcg; /* user & group rc */
 613         ENTRY;
 614
 615         /* let's start with user quota */
 616         qi->lqi_id.qid_uid = uid;
 617         qi->lqi_type       = USRQUOTA;
 618         qi->lqi_space      = space;
 619         qi->lqi_is_blk     = is_blk;
 620         rcu = osd_declare_qid(env, oh, qi, obj, true, flags);
 621
 622         if (force && (rcu == -EDQUOT || rcu == -EINPROGRESS))
 623                 /* ignore EDQUOT & EINPROGRESS when changes are done by root */
 624                 rcu = 0;
 625
 626         /* For non-fatal error, we want to continue to get the noquota flags
 627          * for group id. This is only for commit write, which has @flags passed
 628          * in. See osd_declare_write_commit().
 629          * When force is set to true, we also want to proceed with the gid */
 630         if (rcu && (rcu != -EDQUOT || flags == NULL))
 631                 RETURN(rcu);
 632
 633         /* and now group quota */
 634         qi->lqi_id.qid_gid = gid;
 635         qi->lqi_type       = GRPQUOTA;
 636         rcg = osd_declare_qid(env, oh, qi, obj, true, flags);
 637
 638         if (force && (rcg == -EDQUOT || rcg == -EINPROGRESS))
 639                 /* as before, ignore EDQUOT & EINPROGRESS for root */
 640                 rcg = 0;
 641
 642         RETURN(rcu ? rcu : rcg);
 643 }
 644
 645 int osd_quota_migration(const struct lu_env *env, struct dt_object *dt)
 646 {
 647         struct osd_thread_info  *oti = osd_oti_get(env);
 648         struct osd_device       *osd = osd_obj2dev(osd_dt_obj(dt));
 649         struct dt_object        *root, *parent = NULL, *admin = NULL;
 650         dt_obj_version_t         version;
 651         char                    *fname, *fnames[] = {ADMIN_USR, ADMIN_GRP};
 652         int                      rc, i;
 653         ENTRY;
 654
 655         /* not newly created global index */
 656         version = dt_version_get(env, dt);
 657         if (version != 0)
 658                 RETURN(0);
 659
 660         /* locate root */
 661         rc = dt_root_get(env, &osd->od_dt_dev, &oti->oti_fid);
 662         if (rc) {
 663                 CERROR("%s: Can't get root FID, rc:%d\n", osd->od_svname, rc);
 664                 RETURN(rc);
 665         }
 666
 667         root = dt_locate(env, &osd->od_dt_dev, &oti->oti_fid);
 668         if (IS_ERR(root)) {
 669                 CERROR("%s: Failed to locate root "DFID", rc:%ld\n",
 670                        osd->od_svname, PFID(&oti->oti_fid), PTR_ERR(root));
 671                 RETURN(PTR_ERR(root));
 672         }
 673
 674         /* locate /OBJECTS */
 675         rc = dt_lookup_dir(env, root, OBJECTS, &oti->oti_fid);
 676         if (rc == -ENOENT) {
 677                 GOTO(out, rc = 0);
 678         } else if (rc) {
 679                 CERROR("%s: Failed to lookup %s, rc:%d\n",
 680                        osd->od_svname, OBJECTS, rc);
 681                 GOTO(out, rc);
 682         }
 683
 684         parent = dt_locate(env, &osd->od_dt_dev, &oti->oti_fid);
 685         if (IS_ERR(parent)) {
 686                 CERROR("%s: Failed to locate %s "DFID", rc:%ld\n",
 687                        osd->od_svname, OBJECTS, PFID(&oti->oti_fid),
 688                        PTR_ERR(parent));
 689                 GOTO(out, rc = PTR_ERR(parent));
 690         }
 691
 692         /* locate quota admin files */
 693         for (i = 0; i < 2; i++) {
 694                 fname = fnames[i];
 695                 rc = dt_lookup_dir(env, parent, fname, &oti->oti_fid);
 696                 if (rc == -ENOENT) {
 697                         rc = 0;
 698                         continue;
 699                 } else if (rc) {
 700                         CERROR("%s: Failed to lookup %s, rc:%d\n",
 701                                osd->od_svname, fname, rc);
 702                         GOTO(out, rc);
 703                 }
 704
 705                 admin = dt_locate(env, &osd->od_dt_dev, &oti->oti_fid);
 706                 if (IS_ERR(admin)) {
 707                         CERROR("%s: Failed to locate %s "DFID", rc:%d\n",
 708                                osd->od_svname, fname, PFID(&oti->oti_fid), rc);
 709                         GOTO(out, rc = PTR_ERR(admin));
 710                 }
 711
 712                 if (!dt_object_exists(admin)) {
 713                         CERROR("%s: Old admin file %s doesn't exist, but is "
 714                                "still referenced in parent directory.\n",
 715                                osd->od_svname, fname);
 716                         dt_object_put(env, admin);
 717                         GOTO(out, rc = -ENOENT);
 718                 }
 719
 720                 LCONSOLE_WARN("%s: Detected old quota admin file(%s)! If you "
 721                               "want to keep the old quota limits settings, "
 722                               "please upgrade to lower version(2.5) first to "
 723                               "convert them into new format.\n",
 724                               osd->od_svname, fname);
 725
 726                 dt_object_put(env, admin);
 727                 GOTO(out, rc = -EINVAL);
 728         }
 729 out:
 730         if (parent && !IS_ERR(parent))
 731                 dt_object_put(env, parent);
 732         dt_object_put(env, root);
 733         RETURN(rc);
 734 }