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) 2012, 2013, 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 #define DEBUG_SUBSYSTEM S_MDS
  44
  45 #include <linux/module.h>
  46
  47 /* LUSTRE_VERSION_CODE */
  48 #include <lustre_ver.h>
  49 /*
  50  * struct OBD_{ALLOC,FREE}*()
  51  * OBD_FAIL_CHECK
  52  */
  53 #include <obd.h>
  54 #include <obd_support.h>
  55
  56 /* fid_cpu_to_be() */
  57 #include <lustre_fid.h>
  58 #include <dt_object.h>
  59
  60 #include "osd_oi.h"
  61 /* osd_lookup(), struct osd_thread_info */
  62 #include "osd_internal.h"
  63 #include "osd_scrub.h"
  64
  65 static unsigned int osd_oi_count = OSD_OI_FID_NR;
  66 CFS_MODULE_PARM(osd_oi_count, "i", int, 0444,
  67                 "Number of Object Index containers to be created, "
  68                 "it's only valid for new filesystem.");
  69
  70 /** to serialize concurrent OI index initialization */
  71 static struct mutex oi_init_lock;
  72
  73 static struct dt_index_features oi_feat = {
  74         .dif_flags       = DT_IND_UPDATE,
  75         .dif_recsize_min = sizeof(struct osd_inode_id),
  76         .dif_recsize_max = sizeof(struct osd_inode_id),
  77         .dif_ptrsize     = 4
  78 };
  79
  80 #define OSD_OI_NAME_BASE        "oi.16"
  81
  82 static void osd_oi_table_put(struct osd_thread_info *info,
  83                              struct osd_oi **oi_table, unsigned oi_count)
  84 {
  85         struct iam_container *bag;
  86         int                   i;
  87
  88         for (i = 0; i < oi_count; i++) {
  89                 if (oi_table[i] == NULL)
  90                         continue;
  91
  92                 LASSERT(oi_table[i]->oi_inode != NULL);
  93
  94                 bag = &(oi_table[i]->oi_dir.od_container);
  95                 if (bag->ic_object == oi_table[i]->oi_inode)
  96                         iam_container_fini(bag);
  97                 iput(oi_table[i]->oi_inode);
  98                 oi_table[i]->oi_inode = NULL;
  99                 OBD_FREE_PTR(oi_table[i]);
 100                 oi_table[i] = NULL;
 101         }
 102 }
 103
 104 static int osd_oi_index_create_one(struct osd_thread_info *info,
 105                                    struct osd_device *osd, const char *name,
 106                                    struct dt_index_features *feat)
 107 {
 108         const struct lu_env             *env = info->oti_env;
 109         struct osd_inode_id             *id  = &info->oti_id;
 110         struct buffer_head              *bh;
 111         struct inode                    *inode;
 112         struct ldiskfs_dir_entry_2      *de;
 113         struct dentry                   *dentry;
 114         struct super_block              *sb  = osd_sb(osd);
 115         struct inode                    *dir = sb->s_root->d_inode;
 116         handle_t                        *jh;
 117         int                              rc;
 118
 119         dentry = osd_child_dentry_by_inode(env, dir, name, strlen(name));
 120         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, NULL);
 121         if (bh) {
 122                 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 123                 brelse(bh);
 124                 inode = osd_iget(info, osd, id);
 125                 if (!IS_ERR(inode)) {
 126                         iput(inode);
 127                         inode = ERR_PTR(-EEXIST);
 128                 }
 129                 return PTR_ERR(inode);
 130         }
 131
 132         jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, 100);
 133         if (IS_ERR(jh))
 134                 return PTR_ERR(jh);
 135
 136         inode = ldiskfs_create_inode(jh, dir, (S_IFREG | S_IRUGO | S_IWUSR));
 137         if (IS_ERR(inode)) {
 138                 ldiskfs_journal_stop(jh);
 139                 return PTR_ERR(inode);
 140         }
 141
 142         if (feat->dif_flags & DT_IND_VARKEY)
 143                 rc = iam_lvar_create(inode, feat->dif_keysize_max,
 144                                      feat->dif_ptrsize, feat->dif_recsize_max,
 145                                      jh);
 146         else
 147                 rc = iam_lfix_create(inode, feat->dif_keysize_max,
 148                                      feat->dif_ptrsize, feat->dif_recsize_max,
 149                                      jh);
 150         dentry = osd_child_dentry_by_inode(env, dir, name, strlen(name));
 151         rc = osd_ldiskfs_add_entry(jh, dentry, inode, NULL);
 152         ldiskfs_journal_stop(jh);
 153         iput(inode);
 154         return rc;
 155 }
 156
 157 static struct inode *osd_oi_index_open(struct osd_thread_info *info,
 158                                        struct osd_device *osd,
 159                                        const char *name,
 160                                        struct dt_index_features *f,
 161                                        bool create)
 162 {
 163         struct dentry *dentry;
 164         struct inode  *inode;
 165         int            rc;
 166
 167         dentry = ll_lookup_one_len(name, osd_sb(osd)->s_root, strlen(name));
 168         if (IS_ERR(dentry))
 169                 return (void *) dentry;
 170
 171         if (dentry->d_inode) {
 172                 LASSERT(!is_bad_inode(dentry->d_inode));
 173                 inode = dentry->d_inode;
 174                 atomic_inc(&inode->i_count);
 175                 dput(dentry);
 176                 return inode;
 177         }
 178
 179         /* create */
 180         dput(dentry);
 181         shrink_dcache_parent(osd_sb(osd)->s_root);
 182         if (!create)
 183                 return ERR_PTR(-ENOENT);
 184
 185         rc = osd_oi_index_create_one(info, osd, name, f);
 186         if (rc)
 187                 return ERR_PTR(rc);
 188
 189         dentry = ll_lookup_one_len(name, osd_sb(osd)->s_root, strlen(name));
 190         if (IS_ERR(dentry))
 191                 return (void *) dentry;
 192
 193         if (dentry->d_inode) {
 194                 LASSERT(!is_bad_inode(dentry->d_inode));
 195                 inode = dentry->d_inode;
 196                 atomic_inc(&inode->i_count);
 197                 dput(dentry);
 198                 return inode;
 199         }
 200
 201         return ERR_PTR(-ENOENT);
 202 }
 203
 204 /**
 205  * Open an OI(Ojbect Index) container.
 206  *
 207  * \param       name    Name of OI container
 208  * \param       objp    Pointer of returned OI
 209  *
 210  * \retval      0       success
 211  * \retval      -ve     failure
 212  */
 213 static int osd_oi_open(struct osd_thread_info *info, struct osd_device *osd,
 214                        char *name, struct osd_oi **oi_slot, bool create)
 215 {
 216         struct osd_directory *dir;
 217         struct iam_container *bag;
 218         struct inode         *inode;
 219         struct osd_oi        *oi;
 220         int                   rc;
 221
 222         ENTRY;
 223
 224         oi_feat.dif_keysize_min = sizeof(struct lu_fid);
 225         oi_feat.dif_keysize_max = sizeof(struct lu_fid);
 226
 227         inode = osd_oi_index_open(info, osd, name, &oi_feat, create);
 228         if (IS_ERR(inode))
 229                 RETURN(PTR_ERR(inode));
 230
 231         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NO_OI);
 232         /* 'What the @fid is' is not imporatant, because these objects
 233          * have no OI mappings, and only are visible inside the OSD.*/
 234         lu_igif_build(&info->oti_fid, inode->i_ino, inode->i_generation);
 235         rc = osd_ea_fid_set(info, inode, &info->oti_fid, LMAC_NOT_IN_OI, 0);
 236         if (rc != 0)
 237                 GOTO(out_inode, rc);
 238
 239         OBD_ALLOC_PTR(oi);
 240         if (oi == NULL)
 241                 GOTO(out_inode, rc = -ENOMEM);
 242
 243         oi->oi_inode = inode;
 244         dir = &oi->oi_dir;
 245
 246         bag = &dir->od_container;
 247         rc = iam_container_init(bag, &dir->od_descr, inode);
 248         if (rc < 0)
 249                 GOTO(out_free, rc);
 250
 251         rc = iam_container_setup(bag);
 252         if (rc < 0)
 253                 GOTO(out_container, rc);
 254
 255         *oi_slot = oi;
 256         RETURN(0);
 257
 258 out_container:
 259         iam_container_fini(bag);
 260 out_free:
 261         OBD_FREE_PTR(oi);
 262 out_inode:
 263         iput(inode);
 264         return rc;
 265 }
 266
 267 /**
 268  * Open OI(Object Index) table.
 269  * If \a oi_count is zero, which means caller doesn't know how many OIs there
 270  * will be, this function can either return 0 for new filesystem, or number
 271  * of OIs on existed filesystem.
 272  *
 273  * If \a oi_count is non-zero, which means caller does know number of OIs on
 274  * filesystem, this function should return the exactly same number on
 275  * success, or error code in failure.
 276  *
 277  * \param     oi_count  Number of expected OI containers
 278  * \param     create    Create OIs if doesn't exist
 279  *
 280  * \retval    +ve       number of opened OI containers
 281  * \retval      0       no OI containers found
 282  * \retval    -ve       failure
 283  */
 284 static int
 285 osd_oi_table_open(struct osd_thread_info *info, struct osd_device *osd,
 286                   struct osd_oi **oi_table, unsigned oi_count, bool create)
 287 {
 288         struct scrub_file *sf = &osd->od_scrub.os_file;
 289         int                count = 0;
 290         int                rc = 0;
 291         int                i;
 292         ENTRY;
 293
 294         /* NB: oi_count != 0 means that we have already created/known all OIs
 295          * and have known exact number of OIs. */
 296         LASSERT(oi_count <= OSD_OI_FID_NR_MAX);
 297
 298         for (i = 0; i < (oi_count != 0 ? oi_count : OSD_OI_FID_NR_MAX); i++) {
 299                 char name[12];
 300
 301                 if (oi_table[i] != NULL) {
 302                         count++;
 303                         continue;
 304                 }
 305
 306                 sprintf(name, "%s.%d", OSD_OI_NAME_BASE, i);
 307                 rc = osd_oi_open(info, osd, name, &oi_table[i], create);
 308                 if (rc == 0) {
 309                         count++;
 310                         continue;
 311                 }
 312
 313                 if (rc == -ENOENT && create == false) {
 314                         if (oi_count == 0)
 315                                 return count;
 316
 317                         rc = 0;
 318                         ldiskfs_set_bit(i, sf->sf_oi_bitmap);
 319                         continue;
 320                 }
 321
 322                 CERROR("%.16s: can't open %s: rc = %d\n",
 323                        LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name, name, rc);
 324                 if (oi_count > 0)
 325                         CERROR("%.16s: expect to open total %d OI files.\n",
 326                                LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name,
 327                                oi_count);
 328                 break;
 329         }
 330
 331         if (rc < 0) {
 332                 osd_oi_table_put(info, oi_table, oi_count > 0 ? oi_count : i);
 333                 count = rc;
 334         }
 335
 336         RETURN(count);
 337 }
 338
 339 int osd_oi_init(struct osd_thread_info *info, struct osd_device *osd)
 340 {
 341         struct osd_scrub  *scrub = &osd->od_scrub;
 342         struct scrub_file *sf = &scrub->os_file;
 343         struct osd_oi    **oi;
 344         int                rc;
 345         ENTRY;
 346
 347         OBD_ALLOC(oi, sizeof(*oi) * OSD_OI_FID_NR_MAX);
 348         if (oi == NULL)
 349                 RETURN(-ENOMEM);
 350
 351         mutex_lock(&oi_init_lock);
 352         /* try to open existing multiple OIs first */
 353         rc = osd_oi_table_open(info, osd, oi, sf->sf_oi_count, false);
 354         if (rc < 0)
 355                 GOTO(out, rc);
 356
 357         if (rc > 0) {
 358                 if (rc == sf->sf_oi_count || sf->sf_oi_count == 0)
 359                         GOTO(out, rc);
 360
 361                 osd_scrub_file_reset(scrub,
 362                                      LDISKFS_SB(osd_sb(osd))->s_es->s_uuid,
 363                                      SF_RECREATED);
 364                 osd_oi_count = sf->sf_oi_count;
 365                 goto create;
 366         }
 367
 368         /* if previous failed then try found single OI from old filesystem */
 369         rc = osd_oi_open(info, osd, OSD_OI_NAME_BASE, &oi[0], false);
 370         if (rc == 0) { /* found single OI from old filesystem */
 371                 if (sf->sf_success_count == 0)
 372                         /* XXX: There is one corner case that if the OI_scrub
 373                          *      file crashed or lost and we regard it upgrade,
 374                          *      then we allow IGIF lookup to bypass OI files.
 375                          *
 376                          *      The risk is that osd_fid_lookup() may found
 377                          *      a wrong inode with the given IGIF especially
 378                          *      when the MDT has performed file-level backup
 379                          *      and restored after former upgrading from 1.8
 380                          *      to 2.x. Fortunately, the osd_fid_lookup()can
 381                          *      verify the inode to decrease the risk. */
 382                         osd_scrub_file_reset(scrub,
 383                                         LDISKFS_SB(osd_sb(osd))->s_es->s_uuid,
 384                                         SF_UPGRADE);
 385                 GOTO(out, rc = 1);
 386         } else if (rc != -ENOENT) {
 387                 CERROR("%.16s: can't open %s: rc = %d\n",
 388                        LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name,
 389                        OSD_OI_NAME_BASE, rc);
 390                 GOTO(out, rc);
 391         }
 392
 393         if (sf->sf_oi_count > 0) {
 394                 int i;
 395
 396                 memset(sf->sf_oi_bitmap, 0, SCRUB_OI_BITMAP_SIZE);
 397                 for (i = 0; i < osd_oi_count; i++)
 398                         ldiskfs_set_bit(i, sf->sf_oi_bitmap);
 399                 osd_scrub_file_reset(scrub,
 400                                      LDISKFS_SB(osd_sb(osd))->s_es->s_uuid,
 401                                      SF_RECREATED);
 402         }
 403         sf->sf_oi_count = osd_oi_count;
 404
 405 create:
 406         rc = osd_scrub_file_store(scrub);
 407         if (rc < 0) {
 408                 osd_oi_table_put(info, oi, sf->sf_oi_count);
 409                 GOTO(out, rc);
 410         }
 411
 412         /* No OIs exist, new filesystem, create OI objects */
 413         rc = osd_oi_table_open(info, osd, oi, osd_oi_count, true);
 414         LASSERT(ergo(rc >= 0, rc == osd_oi_count));
 415
 416         GOTO(out, rc);
 417
 418 out:
 419         if (rc < 0) {
 420                 OBD_FREE(oi, sizeof(*oi) * OSD_OI_FID_NR_MAX);
 421         } else {
 422                 LASSERT((rc & (rc - 1)) == 0);
 423                 osd->od_oi_table = oi;
 424                 osd->od_oi_count = rc;
 425                 if (sf->sf_oi_count != rc) {
 426                         sf->sf_oi_count = rc;
 427                         rc = osd_scrub_file_store(scrub);
 428                         if (rc < 0) {
 429                                 osd_oi_table_put(info, oi, sf->sf_oi_count);
 430                                 OBD_FREE(oi, sizeof(*oi) * OSD_OI_FID_NR_MAX);
 431                         }
 432                 } else {
 433                         rc = 0;
 434                 }
 435         }
 436
 437         mutex_unlock(&oi_init_lock);
 438         return rc;
 439 }
 440
 441 void osd_oi_fini(struct osd_thread_info *info, struct osd_device *osd)
 442 {
 443         if (unlikely(osd->od_oi_table == NULL))
 444                 return;
 445
 446         osd_oi_table_put(info, osd->od_oi_table, osd->od_oi_count);
 447
 448         OBD_FREE(osd->od_oi_table,
 449                  sizeof(*(osd->od_oi_table)) * OSD_OI_FID_NR_MAX);
 450         osd->od_oi_table = NULL;
 451 }
 452
 453 static inline int fid_is_fs_root(const struct lu_fid *fid)
 454 {
 455         /* Map root inode to special local object FID */
 456         return (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE &&
 457                          fid_oid(fid) == OSD_FS_ROOT_OID));
 458 }
 459
 460 static int osd_oi_iam_lookup(struct osd_thread_info *oti,
 461                              struct osd_oi *oi, struct dt_rec *rec,
 462                              const struct dt_key *key)
 463 {
 464         struct iam_container  *bag;
 465         struct iam_iterator   *it = &oti->oti_idx_it;
 466         struct iam_path_descr *ipd;
 467         int                    rc;
 468         ENTRY;
 469
 470         LASSERT(oi);
 471         LASSERT(oi->oi_inode);
 472
 473         bag = &oi->oi_dir.od_container;
 474         ipd = osd_idx_ipd_get(oti->oti_env, bag);
 475         if (IS_ERR(ipd))
 476                 RETURN(-ENOMEM);
 477
 478         /* got ipd now we can start iterator. */
 479         iam_it_init(it, bag, 0, ipd);
 480
 481         rc = iam_it_get(it, (struct iam_key *)key);
 482         if (rc > 0)
 483                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)rec);
 484         iam_it_put(it);
 485         iam_it_fini(it);
 486         osd_ipd_put(oti->oti_env, bag, ipd);
 487
 488         LINVRNT(osd_invariant(obj));
 489
 490         RETURN(rc);
 491 }
 492
 493 int fid_is_on_ost(struct osd_thread_info *info, struct osd_device *osd,
 494                   const struct lu_fid *fid, enum oi_check_flags flags)
 495 {
 496         ENTRY;
 497
 498         if (flags & OI_KNOWN_ON_OST)
 499                 RETURN(1);
 500
 501         if (unlikely(fid_is_local_file(fid) || fid_is_igif(fid) ||
 502                      fid_is_llog(fid)) || fid_is_name_llog(fid) ||
 503                      fid_is_quota(fid))
 504                 RETURN(0);
 505
 506         if (fid_is_idif(fid) || fid_is_last_id(fid))
 507                 RETURN(1);
 508
 509         if (!(flags & OI_CHECK_FLD))
 510                 RETURN(0);
 511
 512         if (osd->od_is_ost)
 513                 RETURN(1);
 514
 515         RETURN(0);
 516 }
 517
 518 static int __osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
 519                            const struct lu_fid *fid, struct osd_inode_id *id)
 520 {
 521         struct lu_fid *oi_fid = &info->oti_fid2;
 522         int            rc;
 523
 524         fid_cpu_to_be(oi_fid, fid);
 525         rc = osd_oi_iam_lookup(info, osd_fid2oi(osd, fid), (struct dt_rec *)id,
 526                                (const struct dt_key *)oi_fid);
 527         if (rc > 0) {
 528                 osd_id_unpack(id, id);
 529                 rc = 0;
 530         } else if (rc == 0) {
 531                 rc = -ENOENT;
 532         }
 533         return rc;
 534 }
 535
 536 int osd_oi_lookup(struct osd_thread_info *info, struct osd_device *osd,
 537                   const struct lu_fid *fid, struct osd_inode_id *id,
 538                   enum oi_check_flags flags)
 539 {
 540         if (unlikely(fid_is_last_id(fid)))
 541                 return osd_obj_spec_lookup(info, osd, fid, id);
 542
 543         if (fid_is_on_ost(info, osd, fid, flags) || fid_is_llog(fid))
 544                 return osd_obj_map_lookup(info, osd, fid, id);
 545
 546         if (fid_is_fs_root(fid)) {
 547                 osd_id_gen(id, osd_sb(osd)->s_root->d_inode->i_ino,
 548                            osd_sb(osd)->s_root->d_inode->i_generation);
 549                 return 0;
 550         }
 551
 552         if (unlikely(fid_is_acct(fid)))
 553                 return osd_acct_obj_lookup(info, osd, fid, id);
 554
 555         if (!osd->od_igif_inoi && fid_is_igif(fid)) {
 556                 osd_id_gen(id, lu_igif_ino(fid), lu_igif_gen(fid));
 557                 return 0;
 558         }
 559
 560         return __osd_oi_lookup(info, osd, fid, id);
 561 }
 562
 563 static int osd_oi_iam_refresh(struct osd_thread_info *oti, struct osd_oi *oi,
 564                              const struct dt_rec *rec, const struct dt_key *key,
 565                              struct thandle *th, bool insert)
 566 {
 567         struct iam_container    *bag;
 568         struct iam_path_descr   *ipd;
 569         struct osd_thandle      *oh;
 570         int                     rc;
 571         ENTRY;
 572
 573         LASSERT(oi);
 574         LASSERT(oi->oi_inode);
 575         ll_vfs_dq_init(oi->oi_inode);
 576
 577         bag = &oi->oi_dir.od_container;
 578         ipd = osd_idx_ipd_get(oti->oti_env, bag);
 579         if (unlikely(ipd == NULL))
 580                 RETURN(-ENOMEM);
 581
 582         oh = container_of0(th, struct osd_thandle, ot_super);
 583         LASSERT(oh->ot_handle != NULL);
 584         LASSERT(oh->ot_handle->h_transaction != NULL);
 585         if (insert)
 586                 rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
 587                                 (const struct iam_rec *)rec, ipd);
 588         else
 589                 rc = iam_update(oh->ot_handle, bag, (const struct iam_key *)key,
 590                                 (const struct iam_rec *)rec, ipd);
 591         osd_ipd_put(oti->oti_env, bag, ipd);
 592         LINVRNT(osd_invariant(obj));
 593         RETURN(rc);
 594 }
 595
 596 int osd_oi_insert(struct osd_thread_info *info, struct osd_device *osd,
 597                   const struct lu_fid *fid, const struct osd_inode_id *id,
 598                   struct thandle *th, enum oi_check_flags flags)
 599 {
 600         struct lu_fid       *oi_fid = &info->oti_fid2;
 601         struct osd_inode_id *oi_id  = &info->oti_id2;
 602         int                  rc     = 0;
 603
 604         if (unlikely(fid_is_last_id(fid)))
 605                 return osd_obj_spec_insert(info, osd, fid, id, th);
 606
 607         if (fid_is_on_ost(info, osd, fid, flags) || fid_is_llog(fid))
 608                 return osd_obj_map_insert(info, osd, fid, id, th);
 609
 610         fid_cpu_to_be(oi_fid, fid);
 611         osd_id_pack(oi_id, id);
 612         rc = osd_oi_iam_refresh(info, osd_fid2oi(osd, fid),
 613                                (const struct dt_rec *)oi_id,
 614                                (const struct dt_key *)oi_fid, th, true);
 615         if (rc != 0) {
 616                 struct inode *inode;
 617                 struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
 618
 619                 if (rc != -EEXIST)
 620                         return rc;
 621
 622                 rc = osd_oi_lookup(info, osd, fid, oi_id, 0);
 623                 if (rc != 0)
 624                         return rc;
 625
 626                 if (unlikely(osd_id_eq(id, oi_id)))
 627                         return 0;
 628
 629                 /* Check whether the mapping for oi_id is valid or not. */
 630                 inode = osd_iget(info, osd, oi_id);
 631                 if (IS_ERR(inode)) {
 632                         rc = PTR_ERR(inode);
 633                         if (rc == -ENOENT || rc == -ESTALE)
 634                                 goto update;
 635                         return rc;
 636                 }
 637
 638                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
 639                 iput(inode);
 640                 if (rc == -ENODATA)
 641                         goto update;
 642
 643                 if (rc != 0)
 644                         return rc;
 645
 646                 if (!(lma->lma_compat & LMAC_NOT_IN_OI) &&
 647                     lu_fid_eq(fid, &lma->lma_self_fid)) {
 648                         CERROR("%.16s: the FID "DFID" is used by two objects: "
 649                                "%u/%u %u/%u\n",
 650                                LDISKFS_SB(osd_sb(osd))->s_es->s_volume_name,
 651                                PFID(fid), oi_id->oii_ino, oi_id->oii_gen,
 652                                id->oii_ino, id->oii_gen);
 653                         return -EEXIST;
 654                 }
 655
 656 update:
 657                 osd_id_pack(oi_id, id);
 658                 rc = osd_oi_iam_refresh(info, osd_fid2oi(osd, fid),
 659                                         (const struct dt_rec *)oi_id,
 660                                         (const struct dt_key *)oi_fid, th, false);
 661                 if (rc != 0)
 662                         return rc;
 663         }
 664
 665         if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE))
 666                 rc = osd_obj_spec_insert(info, osd, fid, id, th);
 667         return rc;
 668 }
 669
 670 static int osd_oi_iam_delete(struct osd_thread_info *oti, struct osd_oi *oi,
 671                              const struct dt_key *key, struct thandle *handle)
 672 {
 673         struct iam_container  *bag;
 674         struct iam_path_descr *ipd;
 675         struct osd_thandle    *oh;
 676         int                    rc;
 677         ENTRY;
 678
 679         LASSERT(oi);
 680         LASSERT(oi->oi_inode);
 681         ll_vfs_dq_init(oi->oi_inode);
 682
 683         bag = &oi->oi_dir.od_container;
 684         ipd = osd_idx_ipd_get(oti->oti_env, bag);
 685         if (unlikely(ipd == NULL))
 686                 RETURN(-ENOMEM);
 687
 688         oh = container_of0(handle, struct osd_thandle, ot_super);
 689         LASSERT(oh->ot_handle != NULL);
 690         LASSERT(oh->ot_handle->h_transaction != NULL);
 691
 692         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
 693         osd_ipd_put(oti->oti_env, bag, ipd);
 694         LINVRNT(osd_invariant(obj));
 695         RETURN(rc);
 696 }
 697
 698 int osd_oi_delete(struct osd_thread_info *info,
 699                   struct osd_device *osd, const struct lu_fid *fid,
 700                   struct thandle *th, enum oi_check_flags flags)
 701 {
 702         struct lu_fid *oi_fid = &info->oti_fid2;
 703
 704         /* clear idmap cache */
 705         if (lu_fid_eq(fid, &info->oti_cache.oic_fid))
 706                 fid_zero(&info->oti_cache.oic_fid);
 707
 708         if (fid_is_last_id(fid))
 709                 return 0;
 710
 711         if (fid_is_on_ost(info, osd, fid, flags) || fid_is_llog(fid))
 712                 return osd_obj_map_delete(info, osd, fid, th);
 713
 714         fid_cpu_to_be(oi_fid, fid);
 715         return osd_oi_iam_delete(info, osd_fid2oi(osd, fid),
 716                                  (const struct dt_key *)oi_fid, th);
 717 }
 718
 719 int osd_oi_update(struct osd_thread_info *info, struct osd_device *osd,
 720                   const struct lu_fid *fid, const struct osd_inode_id *id,
 721                   struct thandle *th, enum oi_check_flags flags)
 722 {
 723         struct lu_fid       *oi_fid = &info->oti_fid2;
 724         struct osd_inode_id *oi_id  = &info->oti_id2;
 725         int                  rc     = 0;
 726
 727         if (unlikely(fid_is_last_id(fid)))
 728                 return osd_obj_spec_update(info, osd, fid, id, th);
 729
 730         if (fid_is_on_ost(info, osd, fid, flags) || fid_is_llog(fid))
 731                 return osd_obj_map_update(info, osd, fid, id, th);
 732
 733         fid_cpu_to_be(oi_fid, fid);
 734         osd_id_pack(oi_id, id);
 735         rc = osd_oi_iam_refresh(info, osd_fid2oi(osd, fid),
 736                                (const struct dt_rec *)oi_id,
 737                                (const struct dt_key *)oi_fid, th, false);
 738         if (rc != 0)
 739                 return rc;
 740
 741         if (unlikely(fid_seq(fid) == FID_SEQ_LOCAL_FILE))
 742                 rc = osd_obj_spec_update(info, osd, fid, id, th);
 743         return rc;
 744 }
 745
 746 int osd_oi_mod_init(void)
 747 {
 748         if (osd_oi_count == 0 || osd_oi_count > OSD_OI_FID_NR_MAX)
 749                 osd_oi_count = OSD_OI_FID_NR;
 750
 751         if ((osd_oi_count & (osd_oi_count - 1)) != 0) {
 752                 LCONSOLE_WARN("Round up oi_count %d to power2 %d\n",
 753                               osd_oi_count, size_roundup_power2(osd_oi_count));
 754                 osd_oi_count = size_roundup_power2(osd_oi_count);
 755         }
 756
 757         mutex_init(&oi_init_lock);
 758         return 0;
 759 }