lustre/osd-ldiskfs/osd_oi.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, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osd/osd_oi.c
  37  *
  38  * Object Index.
  39  *
  40  * Author: Nikita Danilov <nikita@clusterfs.com>
  41  */
  42
  43 /*
  44  * oi uses two mechanisms to implement fid->cookie mapping:
  45  *
  46  *     - persistent index, where cookie is a record and fid is a key, and
  47  *
  48  *     - algorithmic mapping for "igif" fids.
  49  *
  50  */
  51
  52 #define DEBUG_SUBSYSTEM S_MDS
  53
  54 #include <linux/module.h>
  55
  56 /* LUSTRE_VERSION_CODE */
  57 #include <lustre_ver.h>
  58 /*
  59  * struct OBD_{ALLOC,FREE}*()
  60  * OBD_FAIL_CHECK
  61  */
  62 #include <obd.h>
  63 #include <obd_support.h>
  64
  65 /* fid_cpu_to_be() */
  66 #include <lustre_fid.h>
  67 #include <dt_object.h>
  68
  69 #include "osd_oi.h"
  70 /* osd_lookup(), struct osd_thread_info */
  71 #include "osd_internal.h"
  72 #include "osd_scrub.h"
  73
  74 static unsigned int osd_oi_count = OSD_OI_FID_NR;
  75 CFS_MODULE_PARM(osd_oi_count, "i", int, 0444,
  76                 "Number of Object Index containers to be created, "
  77                 "it's only valid for new filesystem.");
  78
  79 /** to serialize concurrent OI index initialization */
  80 static struct mutex oi_init_lock;
  81
  82 static struct dt_index_features oi_feat = {
  83         .dif_flags       = DT_IND_UPDATE,
  84         .dif_recsize_min = sizeof(struct osd_inode_id),
  85         .dif_recsize_max = sizeof(struct osd_inode_id),
  86         .dif_ptrsize     = 4
  87 };
  88
  89 #define OSD_OI_NAME_BASE        "oi.16"
  90
  91 static void osd_oi_table_put(struct osd_thread_info *info,
  92                              struct osd_oi **oi_table, unsigned oi_count)
  93 {
  94         struct iam_container *bag;
  95         int                   i;
  96
  97         for (i = 0; i < oi_count; i++) {
  98                 if (oi_table[i] == NULL)
  99                         continue;
 100
 101                 LASSERT(oi_table[i]->oi_inode != NULL);
 102
 103                 bag = &(oi_table[i]->oi_dir.od_container);
 104                 if (bag->ic_object == oi_table[i]->oi_inode)
 105                         iam_container_fini(bag);
 106                 iput(oi_table[i]->oi_inode);
 107                 oi_table[i]->oi_inode = NULL;
 108                 OBD_FREE_PTR(oi_table[i]);
 109                 oi_table[i] = NULL;
 110         }
 111 }
 112
 113 static int osd_oi_index_create_one(struct osd_thread_info *info,
 114                                    struct osd_device *osd, const char *name,
 115                                    struct dt_index_features *feat)
 116 {
 117         const struct lu_env             *env = info->oti_env;
 118         struct osd_inode_id             *id  = &info->oti_id;
 119         struct buffer_head              *bh;
 120         struct inode                    *inode;
 121         struct ldiskfs_dir_entry_2      *de;
 122         struct dentry                   *dentry;
 123         struct super_block              *sb  = osd_sb(osd);
 124         struct inode                    *dir = sb->s_root->d_inode;
 125         handle_t                        *jh;
 126         int                              rc;
 127
 128         dentry = osd_child_dentry_by_inode(env, dir, name, strlen(name));
 129         bh = osd_ldiskfs_find_entry(dir, dentry, &de, NULL);
 130         if (bh) {
 131                 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 132                 brelse(bh);
 133                 inode = osd_iget(info, osd, id);
 134                 if (!IS_ERR(inode)) {
 135                         iput(inode);
 136                         inode = ERR_PTR(-EEXIST);
 137                 }
 138                 return PTR_ERR(inode);
 139         }
 140
 141         jh = ldiskfs_journal_start_sb(sb, 100);
 142         if (IS_ERR(jh))
 143                 return PTR_ERR(jh);
 144
 145         inode = ldiskfs_create_inode(jh, dir, (S_IFREG | S_IRUGO | S_IWUSR));
 146         if (IS_ERR(inode)) {
 147                 ldiskfs_journal_stop(jh);
 148                 return PTR_ERR(inode);
 149         }
 150
 151         if (feat->dif_flags & DT_IND_VARKEY)
 152                 rc = iam_lvar_create(inode, feat->dif_keysize_max,
 153                                      feat->dif_ptrsize, feat->dif_recsize_max,
 154                                      jh);
 155         else
 156                 rc = iam_lfix_create(inode, feat->dif_keysize_max,
 157                                      feat->dif_ptrsize, feat->dif_recsize_max,
 158                                      jh);
 159         dentry = osd_child_dentry_by_inode(env, dir, name, strlen(name));
 160         rc = osd_ldiskfs_add_entry(jh, dentry, inode, NULL);
 161         ldiskfs_journal_stop(jh);
 162         iput(inode);
 163         return rc;
 164 }
 165
 166 static struct inode *osd_oi_index_open(struct osd_thread_info *info,
 167                                        struct osd_device *osd,
 168                                        const char *name,
 169                                        struct dt_index_features *f,
 170                                        bool create)
 171 {
 172         struct dentry *dentry;
 173         struct inode  *inode;
 174         int            rc;
 175
 176         dentry = ll_lookup_one_len(name, osd_sb(osd)->s_root, strlen(name));
 177         if (IS_ERR(dentry))
 178                 return (void *) dentry;
 179
 180         if (dentry->d_inode) {
 181                 LASSERT(!is_bad_inode(dentry->d_inode));
 182                 inode = dentry->d_inode;
 183                 atomic_inc(&inode->i_count);
 184                 dput(dentry);
 185                 return inode;
 186         }
 187
 188         /* create */
 189         dput(dentry);
 190         shrink_dcache_parent(osd_sb(osd)->s_root);
 191         if (!create)
 192                 return ERR_PTR(-ENOENT);
 193
 194         rc = osd_oi_index_create_one(info, osd, name, f);
 195         if (rc)
 196                 return ERR_PTR(rc);
 197
 198         dentry = ll_lookup_one_len(name, osd_sb(osd)->s_root, strlen(name));
 199         if (IS_ERR(dentry))
 200                 return (void *) dentry;
 201
 202         if (dentry->d_inode) {
 203                 LASSERT(!is_bad_inode(dentry->d_inode));
 204                 inode = dentry->d_inode;
 205                 atomic_inc(&inode->i_count);
 206                 dput(dentry);
 207                 return inode;
 208         }
 209
 210         return ERR_PTR(-ENOENT);
 211 }
 212
 213 /**
 214  * Open an OI(Ojbect Index) container.
 215  *
 216  * \param       name    Name of OI container
 217  * \param       objp    Pointer of returned OI
 218  *
 219  * \retval      0       success
 220  * \retval      -ve     failure
 221  */
 222 static int osd_oi_open(struct osd_thread_info *info, struct osd_device *osd,
 223                        char *name, struct osd_oi **oi_slot, bool create)
 224 {
 225         struct osd_directory *dir;
 226         struct iam_container *bag;
 227         struct inode         *inode;
 228         struct osd_oi        *oi;
 229         int                   rc;
 230
 231         ENTRY;
 232
 233         oi_feat.dif_keysize_min = sizeof(struct lu_fid);
 234         oi_feat.dif_keysize_max = sizeof(struct lu_fid);
 235
 236         inode = osd_oi_index_open(info, osd, name, &oi_feat, create);
 237         if (IS_ERR(inode))
 238                 RETURN(PTR_ERR(inode));
 239
 240         OBD_ALLOC_PTR(oi);
 241         if (oi == NULL)
 242                 GOTO(out_inode, rc = -ENOMEM);
 243
 244         oi->oi_inode = inode;
 245         dir = &oi->oi_dir;
 246
 247         bag = &dir->od_container;
 248         rc = iam_container_init(bag, &dir->od_descr, inode);
 249         if (rc < 0)
 250                 GOTO(out_free, rc);
 251
 252         rc = iam_container_setup(bag);
 253         if (rc < 0)
 254                 GOTO(out_container, rc);
 255
 256         *oi_slot = oi;
 257         RETURN(0);
 258
 259 out_container:
 260         iam_container_fini(bag);
 261 out_free:
 262         OBD_FREE_PTR(oi);
 263 out_inode:
 264         iput(inode);
 265         return rc;
 266 }
 267
 268 /**
 269  * Open OI(Object Index) table.
 270  * If \a oi_count is zero, which means caller doesn't know how many OIs there
 271  * will be, this function can either return 0 for new filesystem, or number
 272  * of OIs on existed filesystem.
 273  *
 274  * If \a oi_count is non-zero, which means caller does know number of OIs on
 275  * filesystem, this function should return the exactly same number on
 276  * success, or error code in failure.
 277  *
 278  * \param     oi_count  Number of expected OI containers
 279  * \param     create    Create OIs if doesn't exist
 280  *
 281  * \retval    +ve       number of opened OI containers
 282  * \retval      0       no OI containers found
 283  * \retval    -ve       failure
 284  */
 285 static int
 286 osd_oi_table_open(struct osd_thread_info *info, struct osd_device *osd,
 287                   struct osd_oi **oi_table, unsigned oi_count, bool create)
 288 {
 289         struct scrub_file *sf = &osd->od_scrub.os_file;
 290         int                count = 0;
 291         int                rc = 0;
 292         int                i;
 293         ENTRY;
 294
 295         /* NB: oi_count != 0 means that we have already created/known all OIs
 296          * and have known exact number of OIs. */
 297         LASSERT(oi_count <= OSD_OI_FID_NR_MAX);
 298
 299         for (i = 0; i < (oi_count != 0 ? oi_count : OSD_OI_FID_NR_MAX); i++) {
 300                 char name[12];
 301
 302                 if (oi_table[i] != NULL) {
 303                         count++;
 304                         continue;
 305                 }
 306
 307                 sprintf(name, "%s.%d", OSD_OI_NAME_BASE, i);
 308                 rc = osd_oi_open(info, osd, name, &oi_table[i], create);
 309                 if (rc == 0) {
 310                         count++;
 311                         continue;
 312                 }
 313
 314                 if (rc == -ENOENT && create == false) {
 315                         if (oi_count == 0)
 316                                 return count;
 317
 318                         rc = 0;
 319                         ldiskfs_set_bit(i, sf->sf_oi_bitmap);
 320                         continue;
 321                 }
 322
 323                 CERROR("%.16s: can't open %s: rc = %d\n",
 324                        LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name, name, rc);
 325                 if (oi_count > 0)
 326                         CERROR("%.16s: expect to open total %d OI files.\n",
 327                                LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name,
 328                                oi_count);
 329                 break;
 330         }
 331
 332         if (rc < 0) {
 333                 osd_oi_table_put(info, oi_table, oi_count > 0 ? oi_count : i);
 334                 count = rc;
 335         }
 336
 337         RETURN(count);
 338 }
 339
 340 int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd)
 341 {
 342         struct osd_scrub  *scrub = &osd->od_scrub;
 343         struct scrub_file *sf = &scrub->os_file;
 344         struct osd_oi    **oi;
 345         int                rc;
 346         ENTRY;
 347
 348         OBD_ALLOC(oi, sizeof(*oi) * OSD_OI_FID_NR_MAX);
 349         if (oi == NULL)
 350                 RETURN(-ENOMEM);
 351
 352         mutex_lock(&oi_init_lock);
 353         /* try to open existing multiple OIs first */
 354         rc = osd_oi_table_open(info, osd, oi, sf->sf_oi_count, false);
 355         if (rc < 0)
 356                 GOTO(out, rc);
 357
 358         if (rc > 0) {
 359                 if (rc == sf->sf_oi_count || sf->sf_oi_count == 0)
 360                         GOTO(out, rc);
 361
 362                 osd_scrub_file_reset(scrub,
 363                                      LDISKFS_SB(osd_sb(osd))->s_es->s_uuid,
 364                                      SF_RECREATED);
 365                 osd_oi_count = sf->sf_oi_count;
 366                 goto create;
 367         }
 368
 369         /* if previous failed then try found single OI from old filesystem */
 370         rc = osd_oi_open(info, osd, OSD_OI_NAME_BASE, &oi[0], false);
 371         if (rc == 0) { /* found single OI from old filesystem */
 372                 GOTO(out, rc = 1);
 373         } else if (rc != -ENOENT) {
 374                 CERROR("%.16s: can't open %s: rc = %d\n",
 375                        LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name,
 376                        OSD_OI_NAME_BASE, rc);
 377                 GOTO(out, rc);
 378         }
 379
 380         if (sf->sf_oi_count > 0) {
 381                 int i;
 382
 383                 memset(sf->sf_oi_bitmap, 0, SCRUB_OI_BITMAP_SIZE);
 384                 for (i = 0; i < osd_oi_count; i++)
 385                         ldiskfs_set_bit(i, sf->sf_oi_bitmap);
 386                 osd_scrub_file_reset(scrub,
 387                                      LDISKFS_SB(osd_sb(osd))->s_es->s_uuid,
 388                                      SF_RECREATED);
 389         }
 390         sf->sf_oi_count = osd_oi_count;
 391
 392 create:
 393         rc = osd_scrub_file_store(scrub);
 394         if (rc < 0) {
 395                 osd_oi_table_put(info, oi, sf->sf_oi_count);
 396                 GOTO(out, rc);
 397         }
 398
 399         /* No OIs exist, new filesystem, create OI objects */
 400         rc = osd_oi_table_open(info, osd, oi, osd_oi_count, true);
 401         LASSERT(ergo(rc >= 0, rc == osd_oi_count));
 402
 403         GOTO(out, rc);
 404
 405 out:
 406         if (rc < 0) {
 407                 OBD_FREE(oi, sizeof(*oi) * OSD_OI_FID_NR_MAX);
 408         } else {
 409                 LASSERT((rc & (rc - 1)) == 0);
 410                 osd->od_oi_table = oi;
 411                 osd->od_oi_count = rc;
 412                 rc = 0;
 413         }
 414
 415         mutex_unlock(&oi_init_lock);
 416         return rc;
 417 }
 418
 419 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd)
 420 {
 421         if (unlikely(osd->od_oi_table == NULL))
 422                 return;
 423
 424         osd_oi_table_put(info, osd->od_oi_table, osd->od_oi_count);
 425
 426         OBD_FREE(osd->od_oi_table,
 427                  sizeof(*(osd->od_oi_table)) * OSD_OI_FID_NR_MAX);
 428         osd->od_oi_table = NULL;
 429 }
 430
 431 static inline int fid_is_fs_root(const struct lu_fid *fid)
 432 {
 433         /* Map root inode to special local object FID */
 434         return (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE &&
 435                          fid_oid(fid) == OSD_FS_ROOT_OID));
 436 }
 437
 438 static int osd_oi_iam_lookup(struct osd_thread_info *oti,
 439                              struct osd_oi *oi, struct dt_rec *rec,
 440                              const struct dt_key *key)
 441 {
 442         struct iam_container  *bag;
 443         struct iam_iterator   *it = &oti->oti_idx_it;
 444         struct iam_rec        *iam_rec;
 445         struct iam_path_descr *ipd;
 446         int                    rc;
 447         ENTRY;
 448
 449         LASSERT(oi);
 450         LASSERT(oi->oi_inode);
 451
 452         bag = &oi->oi_dir.od_container;
 453         ipd = osd_idx_ipd_get(oti->oti_env, bag);
 454         if (IS_ERR(ipd))
 455                 RETURN(-ENOMEM);
 456
 457         /* got ipd now we can start iterator. */
 458         iam_it_init(it, bag, 0, ipd);
 459
 460         rc = iam_it_get(it, (struct iam_key *)key);
 461         if (rc >= 0) {
 462                 if (S_ISDIR(oi->oi_inode->i_mode))
 463                         iam_rec = (struct iam_rec *)oti->oti_ldp;
 464                 else
 465                         iam_rec = (struct iam_rec *)rec;
 466
 467                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
 468                 if (S_ISDIR(oi->oi_inode->i_mode))
 469                         osd_fid_unpack((struct lu_fid *)rec,
 470                                        (struct osd_fid_pack *)iam_rec);
 471         }
 472         iam_it_put(it);
 473         iam_it_fini(it);
 474         osd_ipd_put(oti->oti_env, bag, ipd);
 475
 476         LINVRNT(osd_invariant(obj));
 477
 478         RETURN(rc);
 479 }
 480
 481 int fid_is_on_ost(struct osd_thread_info *info, struct osd_device *osd,
 482                   const struct lu_fid *fid)
 483 {
 484         struct lu_seq_range *range = &info->oti_seq_range;
 485         int rc;
 486         ENTRY;
 487
 488         if (fid_is_idif(fid) || fid_is_last_id(fid))
 489                 RETURN(1);
 490
 491         rc = osd_fld_lookup(info->oti_env, osd, fid, range);
 492         if (rc != 0) {
 493                 CERROR("%s: Can not lookup fld for "DFID"\n",
 494                        osd2lu_dev(osd)->ld_obd->obd_name, PFID(fid));
 495                 RETURN(rc);
 496         }
 497
 498         CDEBUG(D_INFO, "fid "DFID" range "DRANGE"\n", PFID(fid),
 499                PRANGE(range));
 500
 501         if (range->lsr_flags == LU_SEQ_RANGE_OST)
 502                 RETURN(1);
 503
 504         RETURN(0);
 505 }
 506
 507 int __osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
 508                     const struct lu_fid *fid, struct osd_inode_id *id)
 509 {
 510         struct lu_fid *oi_fid = &info->oti_fid2;
 511         int            rc;
 512
 513         fid_cpu_to_be(oi_fid, fid);
 514         rc = osd_oi_iam_lookup(info, osd_fid2oi(osd, fid), (struct dt_rec *)id,
 515                                (const struct dt_key *)oi_fid);
 516         if (rc > 0) {
 517                 osd_id_unpack(id, id);
 518                 rc = 0;
 519         } else if (rc == 0) {
 520                 rc = -ENOENT;
 521         }
 522         return rc;
 523 }
 524
 525 int osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
 526                   const struct lu_fid *fid, struct osd_inode_id *id)
 527 {
 528         int                  rc = 0;
 529
 530         if ((!fid_is_last_id(fid) && fid_is_on_ost(info, osd, fid)) ||
 531              fid_is_llog(fid)) {
 532                 /* old OSD obj id */
 533                 /* FIXME: actually for all of the OST object */
 534                 rc = osd_obj_map_lookup(info, osd, fid, id);
 535         } else if (fid_is_igif(fid)) {
 536                 osd_id_gen(id, lu_igif_ino(fid), lu_igif_gen(fid));
 537         } else if (fid_is_fs_root(fid)) {
 538                 osd_id_gen(id, osd_sb(osd)->s_root->d_inode->i_ino,
 539                            osd_sb(osd)->s_root->d_inode->i_generation);
 540         } else {
 541                 if (unlikely(fid_is_acct(fid)))
 542                         return osd_acct_obj_lookup(info, osd, fid, id);
 543                 else if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE) ||
 544                          fid_is_last_id(fid))
 545                         return osd_obj_spec_lookup(info, osd, fid, id);
 546
 547                 rc = __osd_oi_lookup(info, osd, fid, id);
 548         }
 549         return rc;
 550 }
 551
 552 static int osd_oi_iam_insert(struct osd_thread_info *oti, struct osd_oi *oi,
 553                              const struct dt_rec *rec, const struct dt_key *key,
 554                              struct thandle *th)
 555 {
 556         struct iam_container  *bag;
 557         struct iam_rec        *iam_rec = (struct iam_rec *)oti->oti_ldp;
 558         struct iam_path_descr *ipd;
 559         struct osd_thandle    *oh;
 560         int                    rc;
 561         ENTRY;
 562
 563         LASSERT(oi);
 564         LASSERT(oi->oi_inode);
 565         ll_vfs_dq_init(oi->oi_inode);
 566
 567         bag = &oi->oi_dir.od_container;
 568         ipd = osd_idx_ipd_get(oti->oti_env, bag);
 569         if (unlikely(ipd == NULL))
 570                 RETURN(-ENOMEM);
 571
 572         oh = container_of0(th, struct osd_thandle, ot_super);
 573         LASSERT(oh->ot_handle != NULL);
 574         LASSERT(oh->ot_handle->h_transaction != NULL);
 575         if (S_ISDIR(oi->oi_inode->i_mode))
 576                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec,
 577                              &oti->oti_fid);
 578         else
 579                 iam_rec = (struct iam_rec *) rec;
 580         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
 581                         iam_rec, ipd);
 582         osd_ipd_put(oti->oti_env, bag, ipd);
 583         LINVRNT(osd_invariant(obj));
 584         RETURN(rc);
 585 }
 586
 587 int osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
 588                   const struct lu_fid *fid, const struct osd_inode_id *id,
 589                   struct thandle *th)
 590 {
 591         struct lu_fid       *oi_fid = &info->oti_fid2;
 592         struct osd_inode_id *oi_id = &info->oti_id2;
 593
 594         if (fid_is_igif(fid) || unlikely(fid_seq(fid) == FID_SEQ_DOT_LUSTRE))
 595                 return 0;
 596
 597         if ((fid_is_on_ost(info, osd, fid) && !fid_is_last_id(fid)) ||
 598              fid_is_llog(fid))
 599                 return osd_obj_map_insert(info, osd, fid, id, th);
 600
 601         /* Server mount should not depends on OI files */
 602         if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE) ||
 603             fid_is_last_id(fid))
 604                 return osd_obj_spec_insert(info, osd, fid, id, th);
 605
 606         fid_cpu_to_be(oi_fid, fid);
 607         osd_id_pack(oi_id, id);
 608         return osd_oi_iam_insert(info, osd_fid2oi(osd, fid),
 609                                  (const struct dt_rec *)oi_id,
 610                                  (const struct dt_key *)oi_fid, th);
 611 }
 612
 613 static int osd_oi_iam_delete(struct osd_thread_info *oti, struct osd_oi *oi,
 614                              const struct dt_key *key, struct thandle *handle)
 615 {
 616         struct iam_container  *bag;
 617         struct iam_path_descr *ipd;
 618         struct osd_thandle    *oh;
 619         int                    rc;
 620         ENTRY;
 621
 622         LASSERT(oi);
 623         LASSERT(oi->oi_inode);
 624         ll_vfs_dq_init(oi->oi_inode);
 625
 626         bag = &oi->oi_dir.od_container;
 627         ipd = osd_idx_ipd_get(oti->oti_env, bag);
 628         if (unlikely(ipd == NULL))
 629                 RETURN(-ENOMEM);
 630
 631         oh = container_of0(handle, struct osd_thandle, ot_super);
 632         LASSERT(oh->ot_handle != NULL);
 633         LASSERT(oh->ot_handle->h_transaction != NULL);
 634
 635         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
 636         osd_ipd_put(oti->oti_env, bag, ipd);
 637         LINVRNT(osd_invariant(obj));
 638         RETURN(rc);
 639 }
 640
 641 int osd_oi_delete(struct osd_thread_info *info,
 642                   struct osd_device *osd, const struct lu_fid *fid,
 643                   struct thandle *th)
 644 {
 645         struct lu_fid *oi_fid = &info->oti_fid2;
 646
 647         if (fid_is_igif(fid) || fid_is_last_id(fid))
 648                 return 0;
 649
 650         LASSERT(fid_seq(fid) != FID_SEQ_LOCAL_FILE);
 651
 652         if (fid_is_on_ost(info, osd, fid) || fid_is_llog(fid))
 653                 return osd_obj_map_delete(info, osd, fid, th);
 654
 655         fid_cpu_to_be(oi_fid, fid);
 656         return osd_oi_iam_delete(info, osd_fid2oi(osd, fid),
 657                                  (const struct dt_key *)oi_fid, th);
 658 }
 659
 660 int osd_oi_mod_init(void)
 661 {
 662         if (osd_oi_count == 0 || osd_oi_count > OSD_OI_FID_NR_MAX)
 663                 osd_oi_count = OSD_OI_FID_NR;
 664
 665         if ((osd_oi_count & (osd_oi_count - 1)) != 0) {
 666                 LCONSOLE_WARN("Round up oi_count %d to power2 %d\n",
 667                               osd_oi_count, size_roundup_power2(osd_oi_count));
 668                 osd_oi_count = size_roundup_power2(osd_oi_count);
 669         }
 670
 671         mutex_init(&oi_init_lock);
 672         return 0;
 673 }