lustre/osd-ldiskfs/osd_compat.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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/osd/osd_compat.c
  33  *
  34  * on-disk structure for managing /O
  35  *
  36  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  37  */
  38
  39 /* LUSTRE_VERSION_CODE */
  40 #include <lustre_ver.h>
  41 /* prerequisite for linux/xattr.h */
  42 #include <linux/types.h>
  43 /* prerequisite for linux/xattr.h */
  44 #include <linux/fs.h>
  45 /* XATTR_{REPLACE,CREATE} */
  46 #include <linux/xattr.h>
  47
  48 /*
  49  * struct OBD_{ALLOC,FREE}*()
  50  * OBD_FAIL_CHECK
  51  */
  52 #include <obd_support.h>
  53
  54 #include "osd_internal.h"
  55 #include "osd_oi.h"
  56
  57 static void osd_push_ctxt(const struct osd_device *dev,
  58                           struct lvfs_run_ctxt *newctxt,
  59                           struct lvfs_run_ctxt *save)
  60 {
  61         OBD_SET_CTXT_MAGIC(newctxt);
  62         newctxt->pwdmnt = dev->od_mnt;
  63         newctxt->pwd = dev->od_mnt->mnt_root;
  64         newctxt->fs = get_ds();
  65         newctxt->umask = current_umask();
  66         newctxt->dt = NULL;
  67
  68         push_ctxt(save, newctxt);
  69 }
  70
  71 /* utility to make a directory */
  72 static struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
  73                                    const char *name, int mode, int fix)
  74 {
  75         struct dentry *dchild;
  76         int err = 0;
  77         ENTRY;
  78
  79         // ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n");
  80         CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name);
  81         dchild = ll_lookup_one_len(name, dir, strlen(name));
  82         if (IS_ERR(dchild))
  83                 GOTO(out_up, dchild);
  84
  85         if (dchild->d_inode) {
  86                 int old_mode = dchild->d_inode->i_mode;
  87                 if (!S_ISDIR(old_mode)) {
  88                         CERROR("found %s (%lu/%u) is mode %o\n", name,
  89                                dchild->d_inode->i_ino,
  90                                dchild->d_inode->i_generation, old_mode);
  91                         GOTO(out_err, err = -ENOTDIR);
  92                 }
  93
  94                 /* Fixup directory permissions if necessary */
  95                 if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
  96                         CDEBUG(D_CONFIG,
  97                                "fixing permissions on %s from %o to %o\n",
  98                                name, old_mode, mode);
  99                         dchild->d_inode->i_mode = (mode & S_IALLUGO) |
 100                                                   (old_mode & ~S_IALLUGO);
 101                         mark_inode_dirty(dchild->d_inode);
 102                 }
 103                 GOTO(out_up, dchild);
 104         }
 105
 106         err = vfs_mkdir(dir->d_inode, dchild, mode);
 107         if (err)
 108                 GOTO(out_err, err);
 109
 110         RETURN(dchild);
 111
 112 out_err:
 113         dput(dchild);
 114         dchild = ERR_PTR(err);
 115 out_up:
 116         return dchild;
 117 }
 118
 119 static int osd_last_rcvd_subdir_count(struct osd_device *osd)
 120 {
 121         struct lr_server_data lsd;
 122         struct dentry        *dlast;
 123         loff_t                off;
 124         int                   rc = 0;
 125         int                   count = OBJ_SUBDIR_COUNT;
 126
 127         ENTRY;
 128
 129         dlast = ll_lookup_one_len(LAST_RCVD, osd_sb(osd)->s_root,
 130                                   strlen(LAST_RCVD));
 131         if (IS_ERR(dlast))
 132                 return PTR_ERR(dlast);
 133         else if (dlast->d_inode == NULL)
 134                 goto out;
 135
 136         off = 0;
 137         rc = osd_ldiskfs_read(dlast->d_inode, &lsd, sizeof(lsd), &off);
 138         if (rc == sizeof(lsd)) {
 139                 CDEBUG(D_INFO, "read last_rcvd header, uuid = %s, "
 140                        "subdir count = %d\n", lsd.lsd_uuid,
 141                        lsd.lsd_subdir_count);
 142                 if (le16_to_cpu(lsd.lsd_subdir_count) > 0)
 143                         count = le16_to_cpu(lsd.lsd_subdir_count);
 144         } else if (rc != 0) {
 145                 CERROR("Can't read last_rcvd file, rc = %d\n", rc);
 146                 if (rc > 0)
 147                         rc = -EFAULT;
 148                 dput(dlast);
 149                 return rc;
 150         }
 151 out:
 152         dput(dlast);
 153         LASSERT(count > 0);
 154         return count;
 155 }
 156
 157 static const char remote_parent_dir[] = "REMOTE_PARENT_DIR";
 158 static int osd_mdt_init(const struct lu_env *env, struct osd_device *dev)
 159 {
 160         struct lvfs_run_ctxt    new;
 161         struct lvfs_run_ctxt    save;
 162         struct dentry           *parent;
 163         struct osd_mdobj_map    *omm;
 164         struct dentry           *d;
 165         struct osd_thread_info  *info = osd_oti_get(env);
 166         struct lu_fid           *fid = &info->oti_fid3;
 167         int                     rc = 0;
 168         ENTRY;
 169
 170         OBD_ALLOC_PTR(dev->od_mdt_map);
 171         if (dev->od_mdt_map == NULL)
 172                 RETURN(-ENOMEM);
 173
 174         omm = dev->od_mdt_map;
 175
 176         parent = osd_sb(dev)->s_root;
 177         osd_push_ctxt(dev, &new, &save);
 178
 179         d = simple_mkdir(parent, dev->od_mnt, remote_parent_dir,
 180                          0755, 1);
 181         if (IS_ERR(d))
 182                 GOTO(cleanup, rc = PTR_ERR(d));
 183
 184         omm->omm_remote_parent = d;
 185
 186         /* Set LMA for remote parent inode */
 187         lu_local_obj_fid(fid, REMOTE_PARENT_DIR_OID);
 188         rc = osd_ea_fid_set(info, d->d_inode, fid, LMAC_NOT_IN_OI, 0);
 189
 190         GOTO(cleanup, rc);
 191
 192 cleanup:
 193         pop_ctxt(&save, &new);
 194         if (rc) {
 195                 if (omm->omm_remote_parent != NULL)
 196                         dput(omm->omm_remote_parent);
 197                 OBD_FREE_PTR(omm);
 198                 dev->od_mdt_map = NULL;
 199         }
 200         return rc;
 201 }
 202
 203 static void osd_mdt_fini(struct osd_device *osd)
 204 {
 205         struct osd_mdobj_map *omm = osd->od_mdt_map;
 206
 207         if (omm == NULL)
 208                 return;
 209
 210         if (omm->omm_remote_parent)
 211                 dput(omm->omm_remote_parent);
 212
 213         OBD_FREE_PTR(omm);
 214         osd->od_ost_map = NULL;
 215 }
 216
 217 int osd_add_to_remote_parent(const struct lu_env *env, struct osd_device *osd,
 218                              struct osd_object *obj, struct osd_thandle *oh)
 219 {
 220         struct osd_mdobj_map    *omm = osd->od_mdt_map;
 221         struct osd_thread_info  *oti = osd_oti_get(env);
 222         struct lustre_mdt_attrs *lma = &oti->oti_ost_attrs.loa_lma;
 223         char                    *name = oti->oti_name;
 224         struct osd_thread_info  *info = osd_oti_get(env);
 225         struct dentry           *dentry;
 226         struct dentry           *parent;
 227         int                     rc;
 228
 229         /* Set REMOTE_PARENT in lma, so other process like unlink or lfsck
 230          * can identify this object quickly */
 231         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry,
 232                          &oti->oti_ost_attrs);
 233         if (rc)
 234                 RETURN(rc);
 235
 236         lma->lma_incompat |= LMAI_REMOTE_PARENT;
 237         lustre_lma_swab(lma);
 238         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 239                              sizeof(*lma), XATTR_REPLACE);
 240         if (rc)
 241                 RETURN(rc);
 242
 243         parent = omm->omm_remote_parent;
 244         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 245         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 246                                            name, strlen(name));
 247         mutex_lock(&parent->d_inode->i_mutex);
 248         rc = osd_ldiskfs_add_entry(info, osd, oh->ot_handle, dentry,
 249                                    obj->oo_inode, NULL);
 250         CDEBUG(D_INODE, "%s: add %s:%lu to remote parent %lu.\n", osd_name(osd),
 251                name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
 252         ldiskfs_inc_count(oh->ot_handle, parent->d_inode);
 253         mark_inode_dirty(parent->d_inode);
 254         mutex_unlock(&parent->d_inode->i_mutex);
 255         RETURN(rc);
 256 }
 257
 258 int osd_delete_from_remote_parent(const struct lu_env *env,
 259                                   struct osd_device *osd,
 260                                   struct osd_object *obj,
 261                                   struct osd_thandle *oh)
 262 {
 263         struct osd_mdobj_map       *omm = osd->od_mdt_map;
 264         struct osd_thread_info     *oti = osd_oti_get(env);
 265         struct lustre_mdt_attrs    *lma = &oti->oti_ost_attrs.loa_lma;
 266         char                       *name = oti->oti_name;
 267         struct dentry              *dentry;
 268         struct dentry              *parent;
 269         struct ldiskfs_dir_entry_2 *de;
 270         struct buffer_head         *bh;
 271         int                        rc;
 272
 273         /* Check lma to see whether it is remote object */
 274         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry,
 275                          &oti->oti_ost_attrs);
 276         if (rc != 0) {
 277                 /* No LMA if the directory is created before 2.0 */
 278                 if (rc == -ENODATA)
 279                         rc = 0;
 280                 RETURN(rc);
 281         }
 282
 283         if (likely(!(lma->lma_incompat & LMAI_REMOTE_PARENT)))
 284                 RETURN(0);
 285
 286         parent = omm->omm_remote_parent;
 287         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 288         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 289                                            name, strlen(name));
 290         mutex_lock(&parent->d_inode->i_mutex);
 291         bh = osd_ldiskfs_find_entry(parent->d_inode, &dentry->d_name, &de,
 292                                     NULL, NULL);
 293         if (IS_ERR(bh)) {
 294                 mutex_unlock(&parent->d_inode->i_mutex);
 295                 RETURN(PTR_ERR(bh));
 296         }
 297         CDEBUG(D_INODE, "%s: el %s:%lu to remote parent %lu.\n", osd_name(osd),
 298                name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
 299         rc = ldiskfs_delete_entry(oh->ot_handle, parent->d_inode, de, bh);
 300         ldiskfs_dec_count(oh->ot_handle, parent->d_inode);
 301         mark_inode_dirty(parent->d_inode);
 302         mutex_unlock(&parent->d_inode->i_mutex);
 303         brelse(bh);
 304
 305         /* Get rid of REMOTE_PARENT flag from incompat */
 306         lma->lma_incompat &= ~LMAI_REMOTE_PARENT;
 307         lustre_lma_swab(lma);
 308         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 309                              sizeof(*lma), XATTR_REPLACE);
 310         RETURN(rc);
 311 }
 312
 313 int osd_lookup_in_remote_parent(struct osd_thread_info *oti,
 314                                 struct osd_device *osd,
 315                                 const struct lu_fid *fid,
 316                                 struct osd_inode_id *id)
 317 {
 318         struct osd_mdobj_map        *omm = osd->od_mdt_map;
 319         char                        *name = oti->oti_name;
 320         struct dentry               *parent;
 321         struct dentry               *dentry;
 322         struct ldiskfs_dir_entry_2 *de;
 323         struct buffer_head         *bh;
 324         int                         rc;
 325         ENTRY;
 326
 327         if (unlikely(osd->od_is_ost))
 328                 RETURN(-ENOENT);
 329
 330         parent = omm->omm_remote_parent;
 331         sprintf(name, DFID_NOBRACE, PFID(fid));
 332         dentry = osd_child_dentry_by_inode(oti->oti_env, parent->d_inode,
 333                                            name, strlen(name));
 334         mutex_lock(&parent->d_inode->i_mutex);
 335         bh = osd_ldiskfs_find_entry(parent->d_inode, &dentry->d_name, &de,
 336                                     NULL, NULL);
 337         if (IS_ERR(bh)) {
 338                 rc = PTR_ERR(bh);
 339         } else {
 340                 struct inode *inode;
 341
 342                 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 343                 brelse(bh);
 344                 inode = osd_iget(oti, osd, id);
 345                 if (IS_ERR(inode)) {
 346                         rc = PTR_ERR(inode);
 347                         if (rc == -ESTALE)
 348                                 rc = -ENOENT;
 349                 } else {
 350                         iput(inode);
 351                         rc = 0;
 352                 }
 353         }
 354         mutex_unlock(&parent->d_inode->i_mutex);
 355         if (rc == 0)
 356                 osd_add_oi_cache(oti, osd, id, fid);
 357         RETURN(rc);
 358 }
 359
 360 /*
 361  * directory structure on legacy OST:
 362  *
 363  * O/<seq>/d0-31/<objid>
 364  * O/<seq>/LAST_ID
 365  * last_rcvd
 366  * LAST_GROUP
 367  * CONFIGS
 368  *
 369  */
 370 static int osd_ost_init(const struct lu_env *env, struct osd_device *dev)
 371 {
 372         struct lvfs_run_ctxt     new;
 373         struct lvfs_run_ctxt     save;
 374         struct dentry           *rootd = osd_sb(dev)->s_root;
 375         struct dentry           *d;
 376         struct osd_thread_info  *info = osd_oti_get(env);
 377         struct inode            *inode;
 378         struct lu_fid           *fid = &info->oti_fid3;
 379         int                      rc;
 380         ENTRY;
 381
 382         OBD_ALLOC_PTR(dev->od_ost_map);
 383         if (dev->od_ost_map == NULL)
 384                 RETURN(-ENOMEM);
 385
 386         /* to get subdir count from last_rcvd */
 387         rc = osd_last_rcvd_subdir_count(dev);
 388         if (rc < 0)
 389                 GOTO(cleanup_alloc, rc);
 390
 391         dev->od_ost_map->om_subdir_count = rc;
 392         rc = 0;
 393
 394         INIT_LIST_HEAD(&dev->od_ost_map->om_seq_list);
 395         rwlock_init(&dev->od_ost_map->om_seq_list_lock);
 396         mutex_init(&dev->od_ost_map->om_dir_init_mutex);
 397
 398         osd_push_ctxt(dev, &new, &save);
 399
 400         d = ll_lookup_one_len("O", rootd, strlen("O"));
 401         if (IS_ERR(d))
 402                 GOTO(cleanup_ctxt, rc = PTR_ERR(d));
 403         if (d->d_inode == NULL) {
 404                 dput(d);
 405                 /* The lookup() may be called again inside simple_mkdir().
 406                  * Since the repeated lookup() only be called for "/O" at
 407                  * mount time, it will not affect the whole performance. */
 408                 d = simple_mkdir(rootd, dev->od_mnt, "O", 0755, 1);
 409                 if (IS_ERR(d))
 410                         GOTO(cleanup_ctxt, rc = PTR_ERR(d));
 411
 412                 /* It is quite probably that the device is new formatted. */
 413                 dev->od_maybe_new = 1;
 414         }
 415
 416         inode = d->d_inode;
 417         dev->od_ost_map->om_root = d;
 418
 419         /* 'What the @fid is' is not imporatant, because the object
 420          * has no OI mapping, and only is visible inside the OSD.*/
 421         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 422         rc = osd_ea_fid_set(info, inode, fid,
 423                     LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 424         if (rc)
 425                 GOTO(cleanup_dentry, rc);
 426
 427         pop_ctxt(&save, &new);
 428         RETURN(0);
 429
 430 cleanup_dentry:
 431         dput(d);
 432 cleanup_ctxt:
 433         pop_ctxt(&save, &new);
 434 cleanup_alloc:
 435         OBD_FREE_PTR(dev->od_ost_map);
 436         return rc;
 437 }
 438
 439 static void osd_seq_free(struct osd_obj_seq *osd_seq)
 440 {
 441         int j;
 442
 443         if (osd_seq->oos_dirs) {
 444                 for (j = 0; j < osd_seq->oos_subdir_count; j++) {
 445                         if (osd_seq->oos_dirs[j])
 446                                 dput(osd_seq->oos_dirs[j]);
 447                 }
 448                 OBD_FREE(osd_seq->oos_dirs,
 449                          sizeof(struct dentry *) * osd_seq->oos_subdir_count);
 450         }
 451
 452         if (osd_seq->oos_root)
 453                 dput(osd_seq->oos_root);
 454
 455         OBD_FREE_PTR(osd_seq);
 456 }
 457
 458 static void osd_ost_fini(struct osd_device *osd)
 459 {
 460         struct osd_obj_seq    *osd_seq;
 461         struct osd_obj_seq    *tmp;
 462         struct osd_obj_map    *map = osd->od_ost_map;
 463         ENTRY;
 464
 465         if (map == NULL)
 466                 return;
 467
 468         write_lock(&map->om_seq_list_lock);
 469         list_for_each_entry_safe(osd_seq, tmp, &map->om_seq_list,
 470                                  oos_seq_list) {
 471                 list_del_init(&osd_seq->oos_seq_list);
 472                 write_unlock(&map->om_seq_list_lock);
 473                 osd_seq_free(osd_seq);
 474                 write_lock(&map->om_seq_list_lock);
 475         }
 476         write_unlock(&map->om_seq_list_lock);
 477         if (map->om_root)
 478                 dput(map->om_root);
 479         OBD_FREE_PTR(map);
 480         osd->od_ost_map = NULL;
 481         EXIT;
 482 }
 483
 484 int osd_obj_map_init(const struct lu_env *env, struct osd_device *dev)
 485 {
 486         int rc;
 487         ENTRY;
 488
 489         /* prepare structures for OST */
 490         rc = osd_ost_init(env, dev);
 491         if (rc)
 492                 RETURN(rc);
 493
 494         if (!dev->od_is_ost) {
 495                 rc = osd_mdt_init(env, dev);
 496                 if (rc)
 497                         osd_ost_fini(dev);
 498         }
 499
 500         RETURN(rc);
 501 }
 502
 503 static struct osd_obj_seq *osd_seq_find_locked(struct osd_obj_map *map, u64 seq)
 504 {
 505         struct osd_obj_seq *osd_seq;
 506
 507         list_for_each_entry(osd_seq, &map->om_seq_list, oos_seq_list) {
 508                 if (osd_seq->oos_seq == seq)
 509                         return osd_seq;
 510         }
 511         return NULL;
 512 }
 513
 514 static struct osd_obj_seq *osd_seq_find(struct osd_obj_map *map, u64 seq)
 515 {
 516         struct osd_obj_seq *osd_seq;
 517
 518         read_lock(&map->om_seq_list_lock);
 519         osd_seq = osd_seq_find_locked(map, seq);
 520         read_unlock(&map->om_seq_list_lock);
 521         return osd_seq;
 522 }
 523
 524 void osd_obj_map_fini(struct osd_device *dev)
 525 {
 526         osd_ost_fini(dev);
 527         osd_mdt_fini(dev);
 528 }
 529
 530 /**
 531  * Update the specified OI mapping.
 532  *
 533  * \retval   1, changed nothing
 534  * \retval   0, changed successfully
 535  * \retval -ve, on error
 536  */
 537 static int osd_obj_update_entry(struct osd_thread_info *info,
 538                                 struct osd_device *osd,
 539                                 struct dentry *dir, const char *name,
 540                                 const struct lu_fid *fid,
 541                                 const struct osd_inode_id *id,
 542                                 handle_t *th)
 543 {
 544         struct inode               *parent = dir->d_inode;
 545         struct dentry              *child;
 546         struct ldiskfs_dir_entry_2 *de;
 547         struct buffer_head         *bh;
 548         struct inode               *inode;
 549         struct dentry              *dentry = &info->oti_obj_dentry;
 550         struct osd_inode_id        *oi_id  = &info->oti_id3;
 551         struct lustre_mdt_attrs    *lma    = &info->oti_ost_attrs.loa_lma;
 552         struct lu_fid              *oi_fid = &lma->lma_self_fid;
 553         int                         rc;
 554         ENTRY;
 555
 556         LASSERT(th != NULL);
 557         LASSERT(th->h_transaction != NULL);
 558
 559         child = &info->oti_child_dentry;
 560         child->d_parent = dir;
 561         child->d_name.hash = 0;
 562         child->d_name.name = name;
 563         child->d_name.len = strlen(name);
 564
 565         ll_vfs_dq_init(parent);
 566         mutex_lock(&parent->i_mutex);
 567         bh = osd_ldiskfs_find_entry(parent, &child->d_name, &de, NULL, NULL);
 568         if (IS_ERR(bh))
 569                 GOTO(out, rc = PTR_ERR(bh));
 570
 571         if (le32_to_cpu(de->inode) == id->oii_ino)
 572                 GOTO(out, rc = 1);
 573
 574         osd_id_gen(oi_id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 575         inode = osd_iget(info, osd, oi_id);
 576         if (IS_ERR(inode)) {
 577                 rc = PTR_ERR(inode);
 578                 if (rc == -ENOENT || rc == -ESTALE)
 579                         goto update;
 580                 GOTO(out, rc);
 581         }
 582
 583         /* The EA inode should NOT be in OI, old OI scrub may added
 584          * such OI mapping by wrong, replace it. */
 585         if (unlikely(osd_is_ea_inode(inode))) {
 586                 iput(inode);
 587                 goto update;
 588         }
 589
 590         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
 591         if (rc == -ENODATA) {
 592                 rc = osd_get_idif(info, inode, dentry, oi_fid);
 593                 if (rc > 0 || rc == -ENODATA) {
 594                         oi_fid = NULL;
 595                         rc = 0;
 596                 }
 597         }
 598         iput(inode);
 599
 600         if (rc != 0)
 601                 GOTO(out, rc);
 602
 603         /* If the OST-object has neither FID-in-LMA nor FID-in-ff, it is
 604          * either a crashed object or a uninitialized one. Replace it. */
 605         if (oi_fid != NULL && lu_fid_eq(fid, oi_fid)) {
 606                 CERROR("%s: the FID "DFID" is used by two objects: "
 607                        "%u/%u %u/%u\n", osd_name(osd), PFID(fid),
 608                        oi_id->oii_ino, oi_id->oii_gen,
 609                        id->oii_ino, id->oii_gen);
 610                 GOTO(out, rc = -EEXIST);
 611         }
 612
 613         if (fid_is_idif(fid) && oi_fid != NULL && fid_is_idif(oi_fid)) {
 614                 __u32 idx1 = fid_idif_ost_idx(fid);
 615                 __u32 idx2 = fid_idif_ost_idx(oi_fid);
 616                 struct ost_id *ostid = &info->oti_ostid;
 617                 struct lu_fid *tfid = &info->oti_fid3;
 618
 619                 LASSERTF(idx1 == 0 || idx1 == osd->od_index,
 620                          "invalid given FID "DFID", not match the "
 621                          "device index %u\n", PFID(fid), osd->od_index);
 622
 623                 if (idx1 != idx2) {
 624                         if (idx1 == 0 && idx2 == osd->od_index) {
 625                                 fid_to_ostid(fid, ostid);
 626                                 ostid_to_fid(tfid, ostid, idx2);
 627                                 if (lu_fid_eq(tfid, oi_fid)) {
 628                                         CERROR("%s: the FID "DFID" is used by "
 629                                                "two objects(2): %u/%u %u/%u\n",
 630                                                osd_name(osd), PFID(fid),
 631                                                oi_id->oii_ino, oi_id->oii_gen,
 632                                                id->oii_ino, id->oii_gen);
 633
 634                                         GOTO(out, rc = -EEXIST);
 635                                 }
 636                         } else if (idx2 == 0 && idx1 == osd->od_index) {
 637                                 fid_to_ostid(oi_fid, ostid);
 638                                 ostid_to_fid(tfid, ostid, idx1);
 639                                 if (lu_fid_eq(tfid, fid)) {
 640                                         CERROR("%s: the FID "DFID" is used by "
 641                                                "two objects(2): %u/%u %u/%u\n",
 642                                                osd_name(osd), PFID(fid),
 643                                                oi_id->oii_ino, oi_id->oii_gen,
 644                                                id->oii_ino, id->oii_gen);
 645
 646                                         GOTO(out, rc = -EEXIST);
 647                                 }
 648                         }
 649                 }
 650         }
 651
 652 update:
 653         /* There may be temporary inconsistency: On one hand, the new
 654          * object may be referenced by multiple entries, which is out
 655          * of our control unless we traverse the whole /O completely,
 656          * which is non-flat order and inefficient, should be avoided;
 657          * On the other hand, the old object may become orphan if it
 658          * is still valid. Since it was referenced by an invalid entry,
 659          * making it as invisible temporary may be not worse. OI scrub
 660          * will process it later. */
 661         rc = ldiskfs_journal_get_write_access(th, bh);
 662         if (rc != 0)
 663                 GOTO(out, rc);
 664
 665         de->inode = cpu_to_le32(id->oii_ino);
 666         rc = ldiskfs_handle_dirty_metadata(th, NULL, bh);
 667
 668         GOTO(out, rc);
 669
 670 out:
 671         if (!IS_ERR(bh))
 672                 brelse(bh);
 673         mutex_unlock(&parent->i_mutex);
 674         return rc;
 675 }
 676
 677 static int osd_obj_del_entry(struct osd_thread_info *info,
 678                              struct osd_device *osd,
 679                              struct dentry *dird, char *name,
 680                              handle_t *th)
 681 {
 682         struct ldiskfs_dir_entry_2 *de;
 683         struct buffer_head         *bh;
 684         struct dentry              *child;
 685         struct inode               *dir = dird->d_inode;
 686         int                         rc;
 687         ENTRY;
 688
 689         LASSERT(th != NULL);
 690         LASSERT(th->h_transaction != NULL);
 691
 692
 693         child = &info->oti_child_dentry;
 694         child->d_name.hash = 0;
 695         child->d_name.name = name;
 696         child->d_name.len = strlen(name);
 697         child->d_parent = dird;
 698         child->d_inode = NULL;
 699
 700         ll_vfs_dq_init(dir);
 701         mutex_lock(&dir->i_mutex);
 702         bh = osd_ldiskfs_find_entry(dir, &child->d_name, &de, NULL, NULL);
 703         if (IS_ERR(bh)) {
 704                 rc = PTR_ERR(bh);
 705         } else {
 706                 rc = ldiskfs_delete_entry(th, dir, de, bh);
 707                 brelse(bh);
 708         }
 709         mutex_unlock(&dir->i_mutex);
 710
 711         RETURN(rc);
 712 }
 713
 714 static int osd_obj_add_entry(struct osd_thread_info *info,
 715                              struct osd_device *osd,
 716                              struct dentry *dir, char *name,
 717                              const struct osd_inode_id *id,
 718                              handle_t *th)
 719 {
 720         struct dentry *child;
 721         struct inode *inode;
 722         int rc;
 723
 724         ENTRY;
 725
 726         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_NO_ENTRY))
 727                 RETURN(0);
 728
 729         LASSERT(th != NULL);
 730         LASSERT(th->h_transaction != NULL);
 731
 732         inode = info->oti_inode;
 733         if (unlikely(inode == NULL)) {
 734                 struct ldiskfs_inode_info *lii;
 735                 OBD_ALLOC_PTR(lii);
 736                 if (lii == NULL)
 737                         RETURN(-ENOMEM);
 738                 inode = info->oti_inode = &lii->vfs_inode;
 739         }
 740
 741         inode->i_sb = osd_sb(osd);
 742         osd_id_to_inode(inode, id);
 743         inode->i_mode = S_IFREG; /* for type in ldiskfs dir entry */
 744
 745         child = &info->oti_child_dentry;
 746         child->d_name.hash = 0;
 747         child->d_name.name = name;
 748         child->d_name.len = strlen(name);
 749         child->d_parent = dir;
 750         child->d_inode = inode;
 751
 752         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
 753                 inode->i_ino++;
 754
 755         ll_vfs_dq_init(dir->d_inode);
 756         mutex_lock(&dir->d_inode->i_mutex);
 757         rc = osd_ldiskfs_add_entry(info, osd, th, child, inode, NULL);
 758         mutex_unlock(&dir->d_inode->i_mutex);
 759
 760         RETURN(rc);
 761 }
 762
 763 /**
 764  * Use %llu for legacy OST sequences, but use %llx for new
 765  * sequences names, so that the O/{seq}/dN/{oid} more closely
 766  * follows the DFID/PFID format. This makes it easier to map from
 767  * debug messages to objects in the future, and the legacy space
 768  * of FID_SEQ_OST_MDT0 will be unused in the future.
 769  **/
 770 static inline void osd_seq_name(char *seq_name, size_t name_size, u64 seq)
 771 {
 772         snprintf(seq_name, name_size,
 773                  (fid_seq_is_rsvd(seq) ||
 774                   fid_seq_is_mdt0(seq)) ? "%llu" : "%llx",
 775                  fid_seq_is_idif(seq) ? 0 : seq);
 776 }
 777
 778 static inline void osd_oid_name(char *name, size_t name_size,
 779                                 const struct lu_fid *fid, u64 id)
 780 {
 781         snprintf(name, name_size,
 782                  (fid_seq_is_rsvd(fid_seq(fid)) ||
 783                   fid_seq_is_mdt0(fid_seq(fid)) ||
 784                   fid_seq_is_idif(fid_seq(fid))) ? "%llu" : "%llx", id);
 785 }
 786
 787 /* external locking is required */
 788 static int osd_seq_load_locked(struct osd_thread_info *info,
 789                                struct osd_device *osd,
 790                                struct osd_obj_seq *osd_seq)
 791 {
 792         struct osd_obj_map  *map = osd->od_ost_map;
 793         struct dentry       *seq_dir;
 794         struct inode        *inode;
 795         struct lu_fid       *fid = &info->oti_fid3;
 796         int                 rc = 0;
 797         int                 i;
 798         char                dir_name[32];
 799         ENTRY;
 800
 801         if (osd_seq->oos_root != NULL)
 802                 RETURN(0);
 803
 804         LASSERT(map);
 805         LASSERT(map->om_root);
 806
 807         osd_seq_name(dir_name, sizeof(dir_name), osd_seq->oos_seq);
 808
 809         seq_dir = simple_mkdir(map->om_root, osd->od_mnt, dir_name, 0755, 1);
 810         if (IS_ERR(seq_dir))
 811                 GOTO(out_err, rc = PTR_ERR(seq_dir));
 812         else if (seq_dir->d_inode == NULL)
 813                 GOTO(out_put, rc = -EFAULT);
 814
 815         inode = seq_dir->d_inode;
 816         osd_seq->oos_root = seq_dir;
 817
 818         /* 'What the @fid is' is not imporatant, because the object
 819          * has no OI mapping, and only is visible inside the OSD.*/
 820         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 821         rc = osd_ea_fid_set(info, inode, fid,
 822                             LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 823         if (rc != 0)
 824                 GOTO(out_put, rc);
 825
 826         LASSERT(osd_seq->oos_dirs == NULL);
 827         OBD_ALLOC(osd_seq->oos_dirs,
 828                   sizeof(seq_dir) * osd_seq->oos_subdir_count);
 829         if (osd_seq->oos_dirs == NULL)
 830                 GOTO(out_put, rc = -ENOMEM);
 831
 832         for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 833                 struct dentry   *dir;
 834
 835                 snprintf(dir_name, sizeof(dir_name), "d%u", i);
 836                 dir = simple_mkdir(osd_seq->oos_root, osd->od_mnt, dir_name,
 837                                    0700, 1);
 838                 if (IS_ERR(dir)) {
 839                         GOTO(out_free, rc = PTR_ERR(dir));
 840                 } else if (dir->d_inode == NULL) {
 841                         dput(dir);
 842                         GOTO(out_free, rc = -EFAULT);
 843                 }
 844
 845                 inode = dir->d_inode;
 846                 osd_seq->oos_dirs[i] = dir;
 847
 848                 /* 'What the @fid is' is not imporatant, because the object
 849                  * has no OI mapping, and only is visible inside the OSD.*/
 850                 lu_igif_build(fid, inode->i_ino, inode->i_generation);
 851                 rc = osd_ea_fid_set(info, inode, fid,
 852                                     LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 853                 if (rc != 0)
 854                         GOTO(out_free, rc);
 855         }
 856
 857         if (rc != 0) {
 858 out_free:
 859                 for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 860                         if (osd_seq->oos_dirs[i] != NULL)
 861                                 dput(osd_seq->oos_dirs[i]);
 862                 }
 863                 OBD_FREE(osd_seq->oos_dirs,
 864                          sizeof(seq_dir) * osd_seq->oos_subdir_count);
 865 out_put:
 866                 dput(seq_dir);
 867                 osd_seq->oos_root = NULL;
 868         }
 869 out_err:
 870         RETURN(rc);
 871 }
 872
 873 static struct osd_obj_seq *osd_seq_load(struct osd_thread_info *info,
 874                                         struct osd_device *osd, u64 seq)
 875 {
 876         struct osd_obj_map      *map;
 877         struct osd_obj_seq      *osd_seq;
 878         int                     rc = 0;
 879         ENTRY;
 880
 881         map = osd->od_ost_map;
 882         LASSERT(map);
 883         LASSERT(map->om_root);
 884
 885         osd_seq = osd_seq_find(map, seq);
 886         if (likely(osd_seq != NULL))
 887                 RETURN(osd_seq);
 888
 889         /* Serializing init process */
 890         mutex_lock(&map->om_dir_init_mutex);
 891
 892         /* Check whether the seq has been added */
 893         read_lock(&map->om_seq_list_lock);
 894         osd_seq = osd_seq_find_locked(map, seq);
 895         if (osd_seq != NULL) {
 896                 read_unlock(&map->om_seq_list_lock);
 897                 GOTO(cleanup, rc = 0);
 898         }
 899         read_unlock(&map->om_seq_list_lock);
 900
 901         OBD_ALLOC_PTR(osd_seq);
 902         if (osd_seq == NULL)
 903                 GOTO(cleanup, rc = -ENOMEM);
 904
 905         INIT_LIST_HEAD(&osd_seq->oos_seq_list);
 906         osd_seq->oos_seq = seq;
 907         /* Init subdir count to be 32, but each seq can have
 908          * different subdir count */
 909         osd_seq->oos_subdir_count = map->om_subdir_count;
 910         rc = osd_seq_load_locked(info, osd, osd_seq);
 911         if (rc != 0)
 912                 GOTO(cleanup, rc);
 913
 914         write_lock(&map->om_seq_list_lock);
 915         list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
 916         write_unlock(&map->om_seq_list_lock);
 917
 918 cleanup:
 919         mutex_unlock(&map->om_dir_init_mutex);
 920         if (rc != 0) {
 921                 if (osd_seq != NULL)
 922                         OBD_FREE_PTR(osd_seq);
 923                 RETURN(ERR_PTR(rc));
 924         }
 925
 926         RETURN(osd_seq);
 927 }
 928
 929 int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
 930                        const struct lu_fid *fid, struct osd_inode_id *id)
 931 {
 932         struct osd_obj_map              *map;
 933         struct osd_obj_seq              *osd_seq;
 934         struct dentry                   *d_seq;
 935         struct dentry                   *child;
 936         struct ost_id                   *ostid = &info->oti_ostid;
 937         int                             dirn;
 938         char                            name[32];
 939         struct ldiskfs_dir_entry_2      *de;
 940         struct buffer_head              *bh;
 941         struct inode                    *dir;
 942         struct inode                    *inode;
 943         ENTRY;
 944
 945         /* on the very first lookup we find and open directories */
 946
 947         map = dev->od_ost_map;
 948         LASSERT(map);
 949         LASSERT(map->om_root);
 950
 951         fid_to_ostid(fid, ostid);
 952         osd_seq = osd_seq_load(info, dev, ostid_seq(ostid));
 953         if (IS_ERR(osd_seq))
 954                 RETURN(PTR_ERR(osd_seq));
 955
 956         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
 957         d_seq = osd_seq->oos_dirs[dirn];
 958         LASSERT(d_seq);
 959
 960         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
 961
 962         child = &info->oti_child_dentry;
 963         child->d_parent = d_seq;
 964         child->d_name.hash = 0;
 965         child->d_name.name = name;
 966         /* XXX: we can use rc from sprintf() instead of strlen() */
 967         child->d_name.len = strlen(name);
 968
 969         dir = d_seq->d_inode;
 970         mutex_lock(&dir->i_mutex);
 971         bh = osd_ldiskfs_find_entry(dir, &child->d_name, &de, NULL, NULL);
 972         mutex_unlock(&dir->i_mutex);
 973
 974         if (IS_ERR(bh))
 975                 RETURN(PTR_ERR(bh));
 976
 977         osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 978         brelse(bh);
 979
 980         inode = osd_iget(info, dev, id);
 981         if (IS_ERR(inode)) {
 982                 int rc = PTR_ERR(inode);
 983
 984                 RETURN(rc == -ENOENT ? -ESTALE : rc);
 985         }
 986
 987         iput(inode);
 988         RETURN(0);
 989 }
 990
 991 int osd_obj_map_insert(struct osd_thread_info *info,
 992                        struct osd_device *osd,
 993                        const struct lu_fid *fid,
 994                        const struct osd_inode_id *id,
 995                        handle_t *th)
 996 {
 997         struct osd_obj_map      *map;
 998         struct osd_obj_seq      *osd_seq;
 999         struct dentry           *d;
1000         struct ost_id           *ostid = &info->oti_ostid;
1001         u64                      oid;
1002         int                     dirn, rc = 0;
1003         char                    name[32];
1004         ENTRY;
1005
1006         map = osd->od_ost_map;
1007         LASSERT(map);
1008
1009         /* map fid to seq:objid */
1010         fid_to_ostid(fid, ostid);
1011
1012         oid = ostid_id(ostid);
1013         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1014         if (IS_ERR(osd_seq))
1015                 RETURN(PTR_ERR(osd_seq));
1016
1017         dirn = oid & (osd_seq->oos_subdir_count - 1);
1018         d = osd_seq->oos_dirs[dirn];
1019         LASSERT(d);
1020
1021         osd_oid_name(name, sizeof(name), fid, oid);
1022
1023 again:
1024         rc = osd_obj_add_entry(info, osd, d, name, id, th);
1025         if (rc == -EEXIST) {
1026                 rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1027                 if (unlikely(rc == -ENOENT))
1028                         goto again;
1029
1030                 if (unlikely(rc == 1))
1031                         RETURN(0);
1032         }
1033
1034         RETURN(rc);
1035 }
1036
1037 int osd_obj_map_delete(struct osd_thread_info *info, struct osd_device *osd,
1038                        const struct lu_fid *fid, handle_t *th)
1039 {
1040         struct osd_obj_map      *map;
1041         struct osd_obj_seq      *osd_seq;
1042         struct dentry           *d;
1043         struct ost_id           *ostid = &info->oti_ostid;
1044         int                     dirn, rc = 0;
1045         char                    name[32];
1046         ENTRY;
1047
1048         map = osd->od_ost_map;
1049         LASSERT(map);
1050
1051         /* map fid to seq:objid */
1052         fid_to_ostid(fid, ostid);
1053
1054         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1055         if (IS_ERR(osd_seq))
1056                 GOTO(cleanup, rc = PTR_ERR(osd_seq));
1057
1058         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1059         d = osd_seq->oos_dirs[dirn];
1060         LASSERT(d);
1061
1062         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1063         rc = osd_obj_del_entry(info, osd, d, name, th);
1064 cleanup:
1065         RETURN(rc);
1066 }
1067
1068 int osd_obj_map_update(struct osd_thread_info *info,
1069                        struct osd_device *osd,
1070                        const struct lu_fid *fid,
1071                        const struct osd_inode_id *id,
1072                        handle_t *th)
1073 {
1074         struct osd_obj_seq      *osd_seq;
1075         struct dentry           *d;
1076         struct ost_id           *ostid = &info->oti_ostid;
1077         int                     dirn, rc = 0;
1078         char                    name[32];
1079         ENTRY;
1080
1081         fid_to_ostid(fid, ostid);
1082         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1083         if (IS_ERR(osd_seq))
1084                 RETURN(PTR_ERR(osd_seq));
1085
1086         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1087         d = osd_seq->oos_dirs[dirn];
1088         LASSERT(d);
1089
1090         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1091         rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1092
1093         RETURN(rc);
1094 }
1095
1096 int osd_obj_map_recover(struct osd_thread_info *info,
1097                         struct osd_device *osd,
1098                         struct inode *src_parent,
1099                         struct dentry *src_child,
1100                         const struct lu_fid *fid)
1101 {
1102         struct osd_obj_seq         *osd_seq;
1103         struct dentry              *tgt_parent;
1104         struct dentry              *tgt_child = &info->oti_child_dentry;
1105         struct inode               *dir;
1106         struct inode               *inode     = src_child->d_inode;
1107         struct ost_id              *ostid     = &info->oti_ostid;
1108         handle_t                   *jh;
1109         struct ldiskfs_dir_entry_2 *de;
1110         struct buffer_head         *bh;
1111         char                        name[32];
1112         int                         dirn;
1113         int                         rc        = 0;
1114         ENTRY;
1115
1116         if (fid_is_last_id(fid)) {
1117                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1118                 if (IS_ERR(osd_seq))
1119                         RETURN(PTR_ERR(osd_seq));
1120
1121                 tgt_parent = osd_seq->oos_root;
1122                 tgt_child->d_name.name = "LAST_ID";
1123                 tgt_child->d_name.len = strlen("LAST_ID");
1124         } else {
1125                 fid_to_ostid(fid, ostid);
1126                 osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1127                 if (IS_ERR(osd_seq))
1128                         RETURN(PTR_ERR(osd_seq));
1129
1130                 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1131                 tgt_parent = osd_seq->oos_dirs[dirn];
1132                 osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1133                 tgt_child->d_name.name = name;
1134                 tgt_child->d_name.len = strlen(name);
1135         }
1136         LASSERT(tgt_parent != NULL);
1137
1138         dir = tgt_parent->d_inode;
1139         tgt_child->d_name.hash = 0;
1140         tgt_child->d_parent = tgt_parent;
1141         tgt_child->d_inode = inode;
1142
1143         /* The non-initialized src_child may be destroyed. */
1144         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
1145                                 osd_dto_credits_noquota[DTO_INDEX_DELETE] +
1146                                 osd_dto_credits_noquota[DTO_INDEX_INSERT] +
1147                                 osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
1148         if (IS_ERR(jh))
1149                 RETURN(PTR_ERR(jh));
1150
1151         ll_vfs_dq_init(src_parent);
1152         ll_vfs_dq_init(dir);
1153
1154         mutex_lock(&src_parent->i_mutex);
1155         mutex_lock(&dir->i_mutex);
1156         bh = osd_ldiskfs_find_entry(dir, &tgt_child->d_name, &de, NULL, NULL);
1157         if (!IS_ERR(bh)) {
1158                 /* XXX: If some other object occupied the same slot. And If such
1159                  *      inode is zero-sized and with SUID+SGID, then means it is
1160                  *      a new created one. Maybe we can remove it and insert the
1161                  *      original one back to the /O/<seq>/d<x>. But there are
1162                  *      something to be considered:
1163                  *
1164                  *      1) The OST-object under /lost+found has crashed LMA.
1165                  *         So it should not conflict with the current one.
1166                  *
1167                  *      2) There are race conditions that: someone may just want
1168                  *         to modify the current one. Even if the OI scrub takes
1169                  *         the object lock when remove the current one, it still
1170                  *         cause the modification to be lost becasue the target
1171                  *         has been removed when the RPC service thread waiting
1172                  *         for the lock.
1173                  *
1174                  *      So keep it there before we have suitable solution. */
1175                 brelse(bh);
1176                 mutex_unlock(&dir->i_mutex);
1177                 mutex_unlock(&src_parent->i_mutex);
1178                 ldiskfs_journal_stop(jh);
1179
1180                 rc = -EEXIST;
1181                 /* If the src object has never been modified, then remove it. */
1182                 if (inode->i_size == 0 && inode->i_mode & S_ISUID &&
1183                     inode->i_mode & S_ISGID) {
1184                         rc = ll_vfs_unlink(src_parent, src_child);
1185                         if (unlikely(rc == -ENOENT))
1186                                 rc = 0;
1187                 }
1188                 RETURN(rc);
1189         }
1190
1191         bh = osd_ldiskfs_find_entry(src_parent, &src_child->d_name, &de,
1192                                     NULL, NULL);
1193         if (unlikely(IS_ERR(bh)))
1194                 GOTO(unlock, rc = PTR_ERR(bh));
1195
1196         rc = ldiskfs_delete_entry(jh, src_parent, de, bh);
1197         brelse(bh);
1198         if (rc != 0)
1199                 GOTO(unlock, rc);
1200
1201         rc = osd_ldiskfs_add_entry(info, osd, jh, tgt_child, inode, NULL);
1202
1203         GOTO(unlock, rc);
1204
1205 unlock:
1206         mutex_unlock(&dir->i_mutex);
1207         mutex_unlock(&src_parent->i_mutex);
1208         ldiskfs_journal_stop(jh);
1209         return rc;
1210 }
1211
1212 static struct dentry *
1213 osd_object_spec_find(struct osd_thread_info *info, struct osd_device *osd,
1214                      const struct lu_fid *fid, char **name)
1215 {
1216         struct dentry *root = ERR_PTR(-ENOENT);
1217
1218         if (fid_is_last_id(fid)) {
1219                 struct osd_obj_seq *osd_seq;
1220
1221                 /* on creation of LAST_ID we create O/<seq> hierarchy */
1222                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1223                 if (IS_ERR(osd_seq))
1224                         RETURN((struct dentry *)osd_seq);
1225
1226                 *name = "LAST_ID";
1227                 root = osd_seq->oos_root;
1228         } else {
1229                 *name = osd_lf_fid2name(fid);
1230                 if (*name == NULL)
1231                         CWARN("UNKNOWN COMPAT FID "DFID"\n", PFID(fid));
1232                 else if ((*name)[0])
1233                         root = osd_sb(osd)->s_root;
1234         }
1235
1236         return root;
1237 }
1238
1239 int osd_obj_spec_update(struct osd_thread_info *info, struct osd_device *osd,
1240                         const struct lu_fid *fid, const struct osd_inode_id *id,
1241                         handle_t *th)
1242 {
1243         struct dentry   *root;
1244         char            *name = NULL;
1245         int              rc;
1246         ENTRY;
1247
1248         root = osd_object_spec_find(info, osd, fid, &name);
1249         if (!IS_ERR(root)) {
1250                 rc = osd_obj_update_entry(info, osd, root, name, fid, id, th);
1251         } else {
1252                 rc = PTR_ERR(root);
1253                 if (rc == -ENOENT)
1254                         rc = 1;
1255         }
1256
1257         RETURN(rc);
1258 }
1259
1260 int osd_obj_spec_insert(struct osd_thread_info *info, struct osd_device *osd,
1261                         const struct lu_fid *fid, const struct osd_inode_id *id,
1262                         handle_t *th)
1263 {
1264         struct dentry   *root;
1265         char            *name = NULL;
1266         int              rc;
1267         ENTRY;
1268
1269         root = osd_object_spec_find(info, osd, fid, &name);
1270         if (!IS_ERR(root)) {
1271                 rc = osd_obj_add_entry(info, osd, root, name, id, th);
1272         } else {
1273                 rc = PTR_ERR(root);
1274                 if (rc == -ENOENT)
1275                         rc = 0;
1276         }
1277
1278         RETURN(rc);
1279 }
1280
1281 int osd_obj_spec_lookup(struct osd_thread_info *info, struct osd_device *osd,
1282                         const struct lu_fid *fid, struct osd_inode_id *id)
1283 {
1284         struct dentry   *root;
1285         struct dentry   *dentry;
1286         struct inode    *inode;
1287         char            *name = NULL;
1288         int             rc = -ENOENT;
1289         ENTRY;
1290
1291         if (fid_is_last_id(fid)) {
1292                 struct osd_obj_seq *osd_seq;
1293
1294                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1295                 if (IS_ERR(osd_seq))
1296                         RETURN(PTR_ERR(osd_seq));
1297                 root = osd_seq->oos_root;
1298                 name = "LAST_ID";
1299         } else {
1300                 root = osd_sb(osd)->s_root;
1301                 name = osd_lf_fid2name(fid);
1302                 if (name == NULL || strlen(name) == 0)
1303                         RETURN(-ENOENT);
1304         }
1305
1306         dentry = ll_lookup_one_len(name, root, strlen(name));
1307         if (!IS_ERR(dentry)) {
1308                 inode = dentry->d_inode;
1309                 if (inode) {
1310                         if (is_bad_inode(inode)) {
1311                                 rc = -EIO;
1312                         } else {
1313                                 osd_id_gen(id, inode->i_ino,
1314                                            inode->i_generation);
1315                                 rc = 0;
1316                         }
1317                 }
1318                 /* if dentry is accessible after osd_compat_spec_insert it
1319                  * will still contain NULL inode, so don't keep it in cache */
1320                 d_invalidate(dentry);
1321                 dput(dentry);
1322         }
1323
1324         RETURN(rc);
1325 }