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.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) 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_compat.c
  37  *
  38  * on-disk structure for managing /O
  39  *
  40  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  41  */
  42
  43 /* LUSTRE_VERSION_CODE */
  44 #include <lustre_ver.h>
  45 /* prerequisite for linux/xattr.h */
  46 #include <linux/types.h>
  47 /* prerequisite for linux/xattr.h */
  48 #include <linux/fs.h>
  49 /* XATTR_{REPLACE,CREATE} */
  50 #include <linux/xattr.h>
  51
  52 /*
  53  * struct OBD_{ALLOC,FREE}*()
  54  * OBD_FAIL_CHECK
  55  */
  56 #include <obd_support.h>
  57
  58 #include "osd_internal.h"
  59 #include "osd_oi.h"
  60
  61 static void osd_push_ctxt(const struct osd_device *dev,
  62                           struct lvfs_run_ctxt *newctxt,
  63                           struct lvfs_run_ctxt *save)
  64 {
  65         OBD_SET_CTXT_MAGIC(newctxt);
  66         newctxt->pwdmnt = dev->od_mnt;
  67         newctxt->pwd = dev->od_mnt->mnt_root;
  68         newctxt->fs = get_ds();
  69
  70         push_ctxt(save, newctxt, NULL);
  71 }
  72
  73 static void osd_pop_ctxt(const struct osd_device *dev,
  74                          struct lvfs_run_ctxt *new,
  75                          struct lvfs_run_ctxt *save)
  76 {
  77         pop_ctxt(save, new, NULL);
  78 }
  79
  80 /* utility to make a directory */
  81 static struct dentry *simple_mkdir(struct dentry *dir, struct vfsmount *mnt,
  82                                    const char *name, int mode, int fix)
  83 {
  84         struct dentry *dchild;
  85         int err = 0;
  86         ENTRY;
  87
  88         // ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n");
  89         CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name);
  90         dchild = ll_lookup_one_len(name, dir, strlen(name));
  91         if (IS_ERR(dchild))
  92                 GOTO(out_up, dchild);
  93
  94         if (dchild->d_inode) {
  95                 int old_mode = dchild->d_inode->i_mode;
  96                 if (!S_ISDIR(old_mode)) {
  97                         CERROR("found %s (%lu/%u) is mode %o\n", name,
  98                                dchild->d_inode->i_ino,
  99                                dchild->d_inode->i_generation, old_mode);
 100                         GOTO(out_err, err = -ENOTDIR);
 101                 }
 102
 103                 /* Fixup directory permissions if necessary */
 104                 if (fix && (old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
 105                         CDEBUG(D_CONFIG,
 106                                "fixing permissions on %s from %o to %o\n",
 107                                name, old_mode, mode);
 108                         dchild->d_inode->i_mode = (mode & S_IALLUGO) |
 109                                                   (old_mode & ~S_IALLUGO);
 110                         mark_inode_dirty(dchild->d_inode);
 111                 }
 112                 GOTO(out_up, dchild);
 113         }
 114
 115         err = vfs_mkdir(dir->d_inode, dchild, mode);
 116         if (err)
 117                 GOTO(out_err, err);
 118
 119         RETURN(dchild);
 120
 121 out_err:
 122         dput(dchild);
 123         dchild = ERR_PTR(err);
 124 out_up:
 125         return dchild;
 126 }
 127
 128 int osd_last_rcvd_subdir_count(struct osd_device *osd)
 129 {
 130         struct lr_server_data lsd;
 131         struct dentry        *dlast;
 132         loff_t                off;
 133         int                   rc = 0;
 134         int                   count = FILTER_SUBDIR_COUNT;
 135
 136         ENTRY;
 137
 138         dlast = ll_lookup_one_len(LAST_RCVD, osd_sb(osd)->s_root,
 139                                   strlen(LAST_RCVD));
 140         if (IS_ERR(dlast))
 141                 return PTR_ERR(dlast);
 142         else if (dlast->d_inode == NULL)
 143                 goto out;
 144
 145         off = 0;
 146         rc = osd_ldiskfs_read(dlast->d_inode, &lsd, sizeof(lsd), &off);
 147         if (rc == sizeof(lsd)) {
 148                 CDEBUG(D_INFO, "read last_rcvd header, uuid = %s, "
 149                        "subdir count = %d\n", lsd.lsd_uuid,
 150                        lsd.lsd_subdir_count);
 151                 if (le16_to_cpu(lsd.lsd_subdir_count) > 0)
 152                         count = le16_to_cpu(lsd.lsd_subdir_count);
 153         } else if (rc != 0) {
 154                 CERROR("Can't read last_rcvd file, rc = %d\n", rc);
 155                 if (rc > 0)
 156                         rc = -EFAULT;
 157                 dput(dlast);
 158                 return rc;
 159         }
 160 out:
 161         dput(dlast);
 162         LASSERT(count > 0);
 163         return count;
 164 }
 165
 166 static const char remote_parent_dir[] = "REMOTE_PARENT_DIR";
 167 static int osd_mdt_init(const struct lu_env *env, struct osd_device *dev)
 168 {
 169         struct lvfs_run_ctxt    new;
 170         struct lvfs_run_ctxt    save;
 171         struct dentry           *parent;
 172         struct osd_mdobj_map    *omm;
 173         struct dentry           *d;
 174         struct osd_thread_info  *info = osd_oti_get(env);
 175         struct lu_fid           *fid = &info->oti_fid3;
 176         int                     rc = 0;
 177         ENTRY;
 178
 179         OBD_ALLOC_PTR(dev->od_mdt_map);
 180         if (dev->od_mdt_map == NULL)
 181                 RETURN(-ENOMEM);
 182
 183         omm = dev->od_mdt_map;
 184
 185         parent = osd_sb(dev)->s_root;
 186         osd_push_ctxt(dev, &new, &save);
 187
 188         d = simple_mkdir(parent, dev->od_mnt, remote_parent_dir,
 189                          0755, 1);
 190         if (IS_ERR(d))
 191                 GOTO(cleanup, rc = PTR_ERR(d));
 192
 193         ldiskfs_set_inode_state(d->d_inode, LDISKFS_STATE_LUSTRE_NO_OI);
 194         omm->omm_remote_parent = d;
 195
 196         /* Set LMA for remote parent inode */
 197         lu_local_obj_fid(fid, REMOTE_PARENT_DIR_OID);
 198         rc = osd_ea_fid_set(info, d->d_inode, fid, LMAC_NOT_IN_OI, 0);
 199
 200         GOTO(cleanup, rc);
 201
 202 cleanup:
 203         pop_ctxt(&save, &new, NULL);
 204         if (rc) {
 205                 if (omm->omm_remote_parent != NULL)
 206                         dput(omm->omm_remote_parent);
 207                 OBD_FREE_PTR(omm);
 208                 dev->od_mdt_map = NULL;
 209         }
 210         return rc;
 211 }
 212
 213 static void osd_mdt_fini(struct osd_device *osd)
 214 {
 215         struct osd_mdobj_map *omm = osd->od_mdt_map;
 216
 217         if (omm == NULL)
 218                 return;
 219
 220         if (omm->omm_remote_parent)
 221                 dput(omm->omm_remote_parent);
 222
 223         OBD_FREE_PTR(omm);
 224         osd->od_ost_map = NULL;
 225 }
 226
 227 int osd_add_to_remote_parent(const struct lu_env *env, struct osd_device *osd,
 228                              struct osd_object *obj, struct osd_thandle *oh)
 229 {
 230         struct osd_mdobj_map    *omm = osd->od_mdt_map;
 231         struct osd_thread_info  *oti = osd_oti_get(env);
 232         struct lustre_mdt_attrs *lma = &oti->oti_mdt_attrs;
 233         char                    *name = oti->oti_name;
 234         struct dentry           *dentry;
 235         struct dentry           *parent;
 236         int                     rc;
 237
 238         /* Set REMOTE_PARENT in lma, so other process like unlink or lfsck
 239          * can identify this object quickly */
 240         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
 241         if (rc != 0)
 242                 RETURN(rc);
 243
 244         lma->lma_incompat |= LMAI_REMOTE_PARENT;
 245         lustre_lma_swab(lma);
 246         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 247                              sizeof(*lma), XATTR_REPLACE);
 248         if (rc != 0)
 249                 RETURN(rc);
 250
 251         parent = omm->omm_remote_parent;
 252         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 253         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 254                                            name, strlen(name));
 255         mutex_lock(&parent->d_inode->i_mutex);
 256         rc = osd_ldiskfs_add_entry(oh->ot_handle, dentry, obj->oo_inode,
 257                                    NULL);
 258         CDEBUG(D_INODE, "%s: add %s:%lu to remote parent %lu.\n", osd_name(osd),
 259                name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
 260         LASSERTF(parent->d_inode->i_nlink > 1, "%s: %lu nlink %d",
 261                  osd_name(osd), parent->d_inode->i_ino,
 262                  parent->d_inode->i_nlink);
 263         parent->d_inode->i_nlink++;
 264         mark_inode_dirty(parent->d_inode);
 265         mutex_unlock(&parent->d_inode->i_mutex);
 266         RETURN(rc);
 267 }
 268
 269 int osd_delete_from_remote_parent(const struct lu_env *env,
 270                                   struct osd_device *osd,
 271                                   struct osd_object *obj,
 272                                   struct osd_thandle *oh)
 273 {
 274         struct osd_mdobj_map       *omm = osd->od_mdt_map;
 275         struct osd_thread_info     *oti = osd_oti_get(env);
 276         struct lustre_mdt_attrs    *lma = &oti->oti_mdt_attrs;
 277         char                       *name = oti->oti_name;
 278         struct dentry              *dentry;
 279         struct dentry              *parent;
 280         struct ldiskfs_dir_entry_2 *de;
 281         struct buffer_head         *bh;
 282         int                        rc;
 283
 284         /* Check lma to see whether it is remote object */
 285         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
 286         if (rc != 0)
 287                 RETURN(rc);
 288
 289         if (likely(!(lma->lma_incompat & LMAI_REMOTE_PARENT)))
 290                 RETURN(0);
 291
 292         parent = omm->omm_remote_parent;
 293         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 294         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 295                                            name, strlen(name));
 296         mutex_lock(&parent->d_inode->i_mutex);
 297         bh = osd_ldiskfs_find_entry(parent->d_inode, dentry, &de, NULL);
 298         if (bh == NULL) {
 299                 mutex_unlock(&parent->d_inode->i_mutex);
 300                 RETURN(-ENOENT);
 301         }
 302         CDEBUG(D_INODE, "%s: el %s:%lu to remote parent %lu.\n", osd_name(osd),
 303                name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
 304         rc = ldiskfs_delete_entry(oh->ot_handle, parent->d_inode, de, bh);
 305         LASSERTF(parent->d_inode->i_nlink > 1, "%s: %lu nlink %d",
 306                  osd_name(osd), parent->d_inode->i_ino,
 307                  parent->d_inode->i_nlink);
 308         parent->d_inode->i_nlink--;
 309         mark_inode_dirty(parent->d_inode);
 310         mutex_unlock(&parent->d_inode->i_mutex);
 311         brelse(bh);
 312
 313         /* Get rid of REMOTE_PARENT flag from incompat */
 314         lma->lma_incompat &= ~LMAI_REMOTE_PARENT;
 315         lustre_lma_swab(lma);
 316         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 317                              sizeof(*lma), XATTR_REPLACE);
 318         RETURN(rc);
 319 }
 320
 321 int osd_lookup_in_remote_parent(struct osd_thread_info *oti,
 322                                 struct osd_device *osd,
 323                                 const struct lu_fid *fid,
 324                                 struct osd_inode_id *id)
 325 {
 326         struct osd_mdobj_map        *omm = osd->od_mdt_map;
 327         char                        *name = oti->oti_name;
 328         struct dentry               *parent;
 329         struct dentry               *dentry;
 330         struct ldiskfs_dir_entry_2 *de;
 331         struct buffer_head         *bh;
 332         int                         rc;
 333         ENTRY;
 334
 335         parent = omm->omm_remote_parent;
 336         sprintf(name, DFID_NOBRACE, PFID(fid));
 337         dentry = osd_child_dentry_by_inode(oti->oti_env, parent->d_inode,
 338                                            name, strlen(name));
 339         mutex_lock(&parent->d_inode->i_mutex);
 340         bh = osd_ldiskfs_find_entry(parent->d_inode, dentry, &de, NULL);
 341         if (bh == NULL) {
 342                 rc = -ENOENT;
 343         } else {
 344                 rc = 0;
 345                 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 346                 brelse(bh);
 347         }
 348         mutex_unlock(&parent->d_inode->i_mutex);
 349         if (rc == 0)
 350                 osd_add_oi_cache(oti, osd, id, fid);
 351         RETURN(rc);
 352 }
 353
 354 /*
 355  * directory structure on legacy OST:
 356  *
 357  * O/<seq>/d0-31/<objid>
 358  * O/<seq>/LAST_ID
 359  * last_rcvd
 360  * LAST_GROUP
 361  * CONFIGS
 362  *
 363  */
 364 static int osd_ost_init(const struct lu_env *env, struct osd_device *dev)
 365 {
 366         struct lvfs_run_ctxt     new;
 367         struct lvfs_run_ctxt     save;
 368         struct dentry           *rootd = osd_sb(dev)->s_root;
 369         struct dentry           *d;
 370         struct osd_thread_info  *info = osd_oti_get(env);
 371         struct inode            *inode;
 372         struct lu_fid           *fid = &info->oti_fid3;
 373         int                      rc;
 374         ENTRY;
 375
 376         OBD_ALLOC_PTR(dev->od_ost_map);
 377         if (dev->od_ost_map == NULL)
 378                 RETURN(-ENOMEM);
 379
 380         /* to get subdir count from last_rcvd */
 381         rc = osd_last_rcvd_subdir_count(dev);
 382         if (rc < 0) {
 383                 OBD_FREE_PTR(dev->od_ost_map);
 384                 RETURN(rc);
 385         }
 386
 387         dev->od_ost_map->om_subdir_count = rc;
 388         rc = 0;
 389
 390         CFS_INIT_LIST_HEAD(&dev->od_ost_map->om_seq_list);
 391         rwlock_init(&dev->od_ost_map->om_seq_list_lock);
 392         sema_init(&dev->od_ost_map->om_dir_init_sem, 1);
 393
 394         osd_push_ctxt(dev, &new, &save);
 395
 396         d = ll_lookup_one_len("O", rootd, strlen("O"));
 397         if (IS_ERR(d))
 398                 GOTO(cleanup, rc = PTR_ERR(d));
 399         if (d->d_inode == NULL) {
 400                 dput(d);
 401                 /* The lookup() may be called again inside simple_mkdir().
 402                  * Since the repeated lookup() only be called for "/O" at
 403                  * mount time, it will not affect the whole performance. */
 404                 d = simple_mkdir(rootd, dev->od_mnt, "O", 0755, 1);
 405                 if (IS_ERR(d))
 406                         GOTO(cleanup, rc = PTR_ERR(d));
 407
 408                 /* It is quite probably that the device is new formatted. */
 409                 dev->od_maybe_new = 1;
 410         }
 411
 412         inode = d->d_inode;
 413         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NO_OI);
 414         dev->od_ost_map->om_root = d;
 415
 416         /* 'What the @fid is' is not imporatant, because the object
 417          * has no OI mapping, and only is visible inside the OSD.*/
 418         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 419         rc = osd_ea_fid_set(info, inode, fid,
 420                             LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 421
 422         GOTO(cleanup, rc);
 423
 424 cleanup:
 425         osd_pop_ctxt(dev, &new, &save);
 426         if (IS_ERR(d)) {
 427                 OBD_FREE_PTR(dev->od_ost_map);
 428                 RETURN(PTR_ERR(d));
 429         }
 430         return rc;
 431 }
 432
 433 static void osd_seq_free(struct osd_obj_map *map,
 434                          struct osd_obj_seq *osd_seq)
 435 {
 436         int j;
 437
 438         cfs_list_del_init(&osd_seq->oos_seq_list);
 439
 440         if (osd_seq->oos_dirs) {
 441                 for (j = 0; j < osd_seq->oos_subdir_count; j++) {
 442                         if (osd_seq->oos_dirs[j])
 443                                 dput(osd_seq->oos_dirs[j]);
 444                 }
 445                 OBD_FREE(osd_seq->oos_dirs,
 446                          sizeof(struct dentry *) * osd_seq->oos_subdir_count);
 447         }
 448
 449         if (osd_seq->oos_root)
 450                 dput(osd_seq->oos_root);
 451
 452         OBD_FREE_PTR(osd_seq);
 453 }
 454
 455 static void osd_ost_fini(struct osd_device *osd)
 456 {
 457         struct osd_obj_seq    *osd_seq;
 458         struct osd_obj_seq    *tmp;
 459         struct osd_obj_map    *map = osd->od_ost_map;
 460         ENTRY;
 461
 462         if (map == NULL)
 463                 return;
 464
 465         write_lock(&map->om_seq_list_lock);
 466         cfs_list_for_each_entry_safe(osd_seq, tmp,
 467                                      &map->om_seq_list,
 468                                      oos_seq_list) {
 469                 osd_seq_free(map, osd_seq);
 470         }
 471         write_unlock(&map->om_seq_list_lock);
 472         if (map->om_root)
 473                 dput(map->om_root);
 474         OBD_FREE_PTR(map);
 475         osd->od_ost_map = NULL;
 476         EXIT;
 477 }
 478
 479 int osd_obj_map_init(const struct lu_env *env, struct osd_device *dev)
 480 {
 481         int rc;
 482         ENTRY;
 483
 484         /* prepare structures for OST */
 485         rc = osd_ost_init(env, dev);
 486         if (rc)
 487                 RETURN(rc);
 488
 489         /* prepare structures for MDS */
 490         rc = osd_mdt_init(env, dev);
 491
 492         RETURN(rc);
 493 }
 494
 495 struct osd_obj_seq *osd_seq_find_locked(struct osd_obj_map *map, obd_seq seq)
 496 {
 497         struct osd_obj_seq *osd_seq;
 498
 499         cfs_list_for_each_entry(osd_seq, &map->om_seq_list, oos_seq_list) {
 500                 if (osd_seq->oos_seq == seq)
 501                         return osd_seq;
 502         }
 503         return NULL;
 504 }
 505
 506 struct osd_obj_seq *osd_seq_find(struct osd_obj_map *map, obd_seq seq)
 507 {
 508         struct osd_obj_seq *osd_seq;
 509
 510         read_lock(&map->om_seq_list_lock);
 511         osd_seq = osd_seq_find_locked(map, seq);
 512         read_unlock(&map->om_seq_list_lock);
 513         return osd_seq;
 514 }
 515
 516 void osd_obj_map_fini(struct osd_device *dev)
 517 {
 518         osd_ost_fini(dev);
 519         osd_mdt_fini(dev);
 520 }
 521
 522 /**
 523  * Update the specified OI mapping.
 524  *
 525  * \retval   1, changed nothing
 526  * \retval   0, changed successfully
 527  * \retval -ve, on error
 528  */
 529 static int osd_obj_update_entry(struct osd_thread_info *info,
 530                                 struct osd_device *osd,
 531                                 struct dentry *dir, const char *name,
 532                                 const struct lu_fid *fid,
 533                                 const struct osd_inode_id *id,
 534                                 struct thandle *th)
 535 {
 536         struct inode               *parent = dir->d_inode;
 537         struct osd_thandle         *oh;
 538         struct dentry              *child;
 539         struct ldiskfs_dir_entry_2 *de;
 540         struct buffer_head         *bh;
 541         struct inode               *inode;
 542         struct dentry              *dentry = &info->oti_obj_dentry;
 543         struct osd_inode_id        *oi_id  = &info->oti_id3;
 544         struct lustre_mdt_attrs    *lma    = &info->oti_mdt_attrs;
 545         struct lu_fid              *oi_fid = &lma->lma_self_fid;
 546         int                         rc;
 547         ENTRY;
 548
 549         oh = container_of(th, struct osd_thandle, ot_super);
 550         LASSERT(oh->ot_handle != NULL);
 551         LASSERT(oh->ot_handle->h_transaction != NULL);
 552
 553         child = &info->oti_child_dentry;
 554         child->d_parent = dir;
 555         child->d_name.hash = 0;
 556         child->d_name.name = name;
 557         child->d_name.len = strlen(name);
 558
 559         ll_vfs_dq_init(parent);
 560         mutex_lock(&parent->i_mutex);
 561         bh = osd_ldiskfs_find_entry(parent, child, &de, NULL);
 562         if (bh == NULL)
 563                 GOTO(out, rc = -ENOENT);
 564
 565         if (le32_to_cpu(de->inode) == id->oii_ino)
 566                 GOTO(out, rc = 1);
 567
 568         osd_id_gen(oi_id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 569         inode = osd_iget(info, osd, oi_id);
 570         if (IS_ERR(inode)) {
 571                 rc = PTR_ERR(inode);
 572                 if (rc == -ENOENT || rc == -ESTALE)
 573                         goto update;
 574                 GOTO(out, rc);
 575         }
 576
 577         rc = osd_get_lma(info, inode, dentry, lma);
 578         if (rc == -ENODATA) {
 579                 rc = osd_get_idif(info, inode, dentry, oi_fid);
 580                 if (rc > 0) {
 581                         oi_fid = NULL;
 582                         rc = 0;
 583                 }
 584         }
 585         iput(inode);
 586
 587         /* If the OST-object has neither FID-in-LMA nor FID-in-ff, it is
 588          * either a crashed object or a uninitialized one. Replace it. */
 589         if (rc == -ENODATA || oi_fid == NULL)
 590                 goto update;
 591
 592         if (rc != 0)
 593                 GOTO(out, rc);
 594
 595         if (lu_fid_eq(fid, oi_fid)) {
 596                 CERROR("%s: the FID "DFID" is used by two objects: "
 597                        "%u/%u %u/%u\n", osd_name(osd), PFID(fid),
 598                        oi_id->oii_ino, oi_id->oii_gen,
 599                        id->oii_ino, id->oii_gen);
 600                 GOTO(out, rc = -EEXIST);
 601         }
 602
 603 update:
 604         /* There may be temporary inconsistency: On one hand, the new
 605          * object may be referenced by multiple entries, which is out
 606          * of our control unless we traverse the whole /O completely,
 607          * which is non-flat order and inefficient, should be avoided;
 608          * On the other hand, the old object may become orphan if it
 609          * is still valid. Since it was referenced by an invalid entry,
 610          * making it as invisible temporary may be not worse. OI scrub
 611          * will process it later. */
 612         rc = ldiskfs_journal_get_write_access(oh->ot_handle, bh);
 613         if (rc != 0)
 614                 GOTO(out, rc);
 615
 616         de->inode = cpu_to_le32(id->oii_ino);
 617         rc = ldiskfs_journal_dirty_metadata(oh->ot_handle, bh);
 618
 619         GOTO(out, rc);
 620
 621 out:
 622         brelse(bh);
 623         mutex_unlock(&parent->i_mutex);
 624         return rc;
 625 }
 626
 627 static int osd_obj_del_entry(struct osd_thread_info *info,
 628                              struct osd_device *osd,
 629                              struct dentry *dird, char *name,
 630                              struct thandle *th)
 631 {
 632         struct ldiskfs_dir_entry_2 *de;
 633         struct buffer_head         *bh;
 634         struct osd_thandle         *oh;
 635         struct dentry              *child;
 636         struct inode               *dir = dird->d_inode;
 637         int                         rc;
 638         ENTRY;
 639
 640         oh = container_of(th, struct osd_thandle, ot_super);
 641         LASSERT(oh->ot_handle != NULL);
 642         LASSERT(oh->ot_handle->h_transaction != NULL);
 643
 644
 645         child = &info->oti_child_dentry;
 646         child->d_name.hash = 0;
 647         child->d_name.name = name;
 648         child->d_name.len = strlen(name);
 649         child->d_parent = dird;
 650         child->d_inode = NULL;
 651
 652         ll_vfs_dq_init(dir);
 653         mutex_lock(&dir->i_mutex);
 654         rc = -ENOENT;
 655         bh = osd_ldiskfs_find_entry(dir, child, &de, NULL);
 656         if (bh) {
 657                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
 658                 brelse(bh);
 659         }
 660         mutex_unlock(&dir->i_mutex);
 661
 662         RETURN(rc);
 663 }
 664
 665 int osd_obj_add_entry(struct osd_thread_info *info,
 666                       struct osd_device *osd,
 667                       struct dentry *dir, char *name,
 668                       const struct osd_inode_id *id,
 669                       struct thandle *th)
 670 {
 671         struct osd_thandle *oh;
 672         struct dentry *child;
 673         struct inode *inode;
 674         int rc;
 675
 676         ENTRY;
 677
 678         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_NO_ENTRY))
 679                 RETURN(0);
 680
 681         oh = container_of(th, struct osd_thandle, ot_super);
 682         LASSERT(oh->ot_handle != NULL);
 683         LASSERT(oh->ot_handle->h_transaction != NULL);
 684
 685         inode = &info->oti_inode;
 686         inode->i_sb = osd_sb(osd);
 687         osd_id_to_inode(inode, id);
 688         inode->i_mode = S_IFREG; /* for type in ldiskfs dir entry */
 689
 690         child = &info->oti_child_dentry;
 691         child->d_name.hash = 0;
 692         child->d_name.name = name;
 693         child->d_name.len = strlen(name);
 694         child->d_parent = dir;
 695         child->d_inode = inode;
 696
 697         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
 698                 inode->i_ino++;
 699
 700         ll_vfs_dq_init(dir->d_inode);
 701         mutex_lock(&dir->d_inode->i_mutex);
 702         rc = osd_ldiskfs_add_entry(oh->ot_handle, child, inode, NULL);
 703         mutex_unlock(&dir->d_inode->i_mutex);
 704
 705         RETURN(rc);
 706 }
 707
 708 /**
 709  * Use LPU64 for legacy OST sequences, but use LPX64i for new
 710  * sequences names, so that the O/{seq}/dN/{oid} more closely
 711  * follows the DFID/PFID format. This makes it easier to map from
 712  * debug messages to objects in the future, and the legacy space
 713  * of FID_SEQ_OST_MDT0 will be unused in the future.
 714  **/
 715 static inline void osd_seq_name(char *seq_name, size_t name_size, obd_seq seq)
 716 {
 717         snprintf(seq_name, name_size,
 718                  (fid_seq_is_rsvd(seq) ||
 719                   fid_seq_is_mdt0(seq)) ? LPU64 : LPX64i,
 720                  fid_seq_is_idif(seq) ? 0 : seq);
 721 }
 722
 723 static inline void osd_oid_name(char *name, size_t name_size,
 724                                 const struct lu_fid *fid, obd_id id)
 725 {
 726         snprintf(name, name_size,
 727                  (fid_seq_is_rsvd(fid_seq(fid)) ||
 728                   fid_seq_is_mdt0(fid_seq(fid)) ||
 729                   fid_seq_is_idif(fid_seq(fid))) ? LPU64 : LPX64i, id);
 730 }
 731
 732 /* external locking is required */
 733 static int osd_seq_load_locked(struct osd_thread_info *info,
 734                                struct osd_device *osd,
 735                                struct osd_obj_seq *osd_seq)
 736 {
 737         struct osd_obj_map  *map = osd->od_ost_map;
 738         struct dentry       *seq_dir;
 739         struct inode        *inode;
 740         struct lu_fid       *fid = &info->oti_fid3;
 741         int                 rc = 0;
 742         int                 i;
 743         char                dir_name[32];
 744         ENTRY;
 745
 746         if (osd_seq->oos_root != NULL)
 747                 RETURN(0);
 748
 749         LASSERT(map);
 750         LASSERT(map->om_root);
 751
 752         osd_seq_name(dir_name, sizeof(dir_name), osd_seq->oos_seq);
 753
 754         seq_dir = simple_mkdir(map->om_root, osd->od_mnt, dir_name, 0755, 1);
 755         if (IS_ERR(seq_dir))
 756                 GOTO(out_err, rc = PTR_ERR(seq_dir));
 757         else if (seq_dir->d_inode == NULL)
 758                 GOTO(out_put, rc = -EFAULT);
 759
 760         inode = seq_dir->d_inode;
 761         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NO_OI);
 762         osd_seq->oos_root = seq_dir;
 763
 764         /* 'What the @fid is' is not imporatant, because the object
 765          * has no OI mapping, and only is visible inside the OSD.*/
 766         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 767         rc = osd_ea_fid_set(info, inode, fid,
 768                             LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 769         if (rc != 0)
 770                 GOTO(out_put, rc);
 771
 772         LASSERT(osd_seq->oos_dirs == NULL);
 773         OBD_ALLOC(osd_seq->oos_dirs,
 774                   sizeof(seq_dir) * osd_seq->oos_subdir_count);
 775         if (osd_seq->oos_dirs == NULL)
 776                 GOTO(out_put, rc = -ENOMEM);
 777
 778         for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 779                 struct dentry   *dir;
 780
 781                 snprintf(dir_name, sizeof(dir_name), "d%u", i);
 782                 dir = simple_mkdir(osd_seq->oos_root, osd->od_mnt, dir_name,
 783                                    0700, 1);
 784                 if (IS_ERR(dir)) {
 785                         GOTO(out_free, rc = PTR_ERR(dir));
 786                 } else if (dir->d_inode == NULL) {
 787                         dput(dir);
 788                         GOTO(out_free, rc = -EFAULT);
 789                 }
 790
 791                 inode = dir->d_inode;
 792                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NO_OI);
 793                 osd_seq->oos_dirs[i] = dir;
 794
 795                 /* 'What the @fid is' is not imporatant, because the object
 796                  * has no OI mapping, and only is visible inside the OSD.*/
 797                 lu_igif_build(fid, inode->i_ino, inode->i_generation);
 798                 rc = osd_ea_fid_set(info, inode, fid,
 799                                     LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 800                 if (rc != 0)
 801                         GOTO(out_free, rc);
 802         }
 803
 804         if (rc != 0) {
 805 out_free:
 806                 for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 807                         if (osd_seq->oos_dirs[i] != NULL)
 808                                 dput(osd_seq->oos_dirs[i]);
 809                 }
 810                 OBD_FREE(osd_seq->oos_dirs,
 811                          sizeof(seq_dir) * osd_seq->oos_subdir_count);
 812 out_put:
 813                 dput(seq_dir);
 814                 osd_seq->oos_root = NULL;
 815         }
 816 out_err:
 817         RETURN(rc);
 818 }
 819
 820 static struct osd_obj_seq *osd_seq_load(struct osd_thread_info *info,
 821                                         struct osd_device *osd, obd_seq seq)
 822 {
 823         struct osd_obj_map      *map;
 824         struct osd_obj_seq      *osd_seq;
 825         int                     rc = 0;
 826         ENTRY;
 827
 828         map = osd->od_ost_map;
 829         LASSERT(map);
 830         LASSERT(map->om_root);
 831
 832         osd_seq = osd_seq_find(map, seq);
 833         if (likely(osd_seq != NULL))
 834                 RETURN(osd_seq);
 835
 836         /* Serializing init process */
 837         down(&map->om_dir_init_sem);
 838
 839         /* Check whether the seq has been added */
 840         read_lock(&map->om_seq_list_lock);
 841         osd_seq = osd_seq_find_locked(map, seq);
 842         if (osd_seq != NULL) {
 843                 read_unlock(&map->om_seq_list_lock);
 844                 GOTO(cleanup, rc = 0);
 845         }
 846         read_unlock(&map->om_seq_list_lock);
 847
 848         OBD_ALLOC_PTR(osd_seq);
 849         if (osd_seq == NULL)
 850                 GOTO(cleanup, rc = -ENOMEM);
 851
 852         CFS_INIT_LIST_HEAD(&osd_seq->oos_seq_list);
 853         osd_seq->oos_seq = seq;
 854         /* Init subdir count to be 32, but each seq can have
 855          * different subdir count */
 856         osd_seq->oos_subdir_count = map->om_subdir_count;
 857         rc = osd_seq_load_locked(info, osd, osd_seq);
 858         if (rc != 0)
 859                 GOTO(cleanup, rc);
 860
 861         write_lock(&map->om_seq_list_lock);
 862         cfs_list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
 863         write_unlock(&map->om_seq_list_lock);
 864
 865 cleanup:
 866         up(&map->om_dir_init_sem);
 867         if (rc != 0) {
 868                 if (osd_seq != NULL)
 869                         OBD_FREE_PTR(osd_seq);
 870                 RETURN(ERR_PTR(rc));
 871         }
 872
 873         RETURN(osd_seq);
 874 }
 875
 876 int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
 877                        const struct lu_fid *fid, struct osd_inode_id *id)
 878 {
 879         struct osd_obj_map              *map;
 880         struct osd_obj_seq              *osd_seq;
 881         struct dentry                   *d_seq;
 882         struct dentry                   *child;
 883         struct ost_id                   *ostid = &info->oti_ostid;
 884         int                             dirn;
 885         char                            name[32];
 886         struct ldiskfs_dir_entry_2      *de;
 887         struct buffer_head              *bh;
 888         struct inode                    *dir;
 889         struct inode                    *inode;
 890         ENTRY;
 891
 892         /* on the very first lookup we find and open directories */
 893
 894         map = dev->od_ost_map;
 895         LASSERT(map);
 896         LASSERT(map->om_root);
 897
 898         fid_to_ostid(fid, ostid);
 899         osd_seq = osd_seq_load(info, dev, ostid_seq(ostid));
 900         if (IS_ERR(osd_seq))
 901                 RETURN(PTR_ERR(osd_seq));
 902
 903         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
 904         d_seq = osd_seq->oos_dirs[dirn];
 905         LASSERT(d_seq);
 906
 907         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
 908
 909         child = &info->oti_child_dentry;
 910         child->d_parent = d_seq;
 911         child->d_name.hash = 0;
 912         child->d_name.name = name;
 913         /* XXX: we can use rc from sprintf() instead of strlen() */
 914         child->d_name.len = strlen(name);
 915
 916         dir = d_seq->d_inode;
 917         mutex_lock(&dir->i_mutex);
 918         bh = osd_ldiskfs_find_entry(dir, child, &de, NULL);
 919         mutex_unlock(&dir->i_mutex);
 920
 921         if (bh == NULL)
 922                 RETURN(-ENOENT);
 923
 924         osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 925         brelse(bh);
 926
 927         inode = osd_iget(info, dev, id);
 928         if (IS_ERR(inode))
 929                 RETURN(PTR_ERR(inode));
 930
 931         iput(inode);
 932         RETURN(0);
 933 }
 934
 935 int osd_obj_map_insert(struct osd_thread_info *info,
 936                        struct osd_device *osd,
 937                        const struct lu_fid *fid,
 938                        const struct osd_inode_id *id,
 939                        struct thandle *th)
 940 {
 941         struct osd_obj_map      *map;
 942         struct osd_obj_seq      *osd_seq;
 943         struct dentry           *d;
 944         struct ost_id           *ostid = &info->oti_ostid;
 945         obd_id                   oid;
 946         int                     dirn, rc = 0;
 947         char                    name[32];
 948         ENTRY;
 949
 950         map = osd->od_ost_map;
 951         LASSERT(map);
 952
 953         /* map fid to seq:objid */
 954         fid_to_ostid(fid, ostid);
 955
 956         oid = ostid_id(ostid);
 957         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
 958         if (IS_ERR(osd_seq))
 959                 RETURN(PTR_ERR(osd_seq));
 960
 961         dirn = oid & (osd_seq->oos_subdir_count - 1);
 962         d = osd_seq->oos_dirs[dirn];
 963         LASSERT(d);
 964
 965         osd_oid_name(name, sizeof(name), fid, oid);
 966
 967 again:
 968         rc = osd_obj_add_entry(info, osd, d, name, id, th);
 969         if (rc == -EEXIST) {
 970                 rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
 971                 if (unlikely(rc == -ENOENT))
 972                         goto again;
 973
 974                 if (unlikely(rc == 1))
 975                         RETURN(0);
 976         }
 977
 978         RETURN(rc);
 979 }
 980
 981 int osd_obj_map_delete(struct osd_thread_info *info, struct osd_device *osd,
 982                        const struct lu_fid *fid, struct thandle *th)
 983 {
 984         struct osd_obj_map      *map;
 985         struct osd_obj_seq      *osd_seq;
 986         struct dentry           *d;
 987         struct ost_id           *ostid = &info->oti_ostid;
 988         int                     dirn, rc = 0;
 989         char                    name[32];
 990         ENTRY;
 991
 992         map = osd->od_ost_map;
 993         LASSERT(map);
 994
 995         /* map fid to seq:objid */
 996         fid_to_ostid(fid, ostid);
 997
 998         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
 999         if (IS_ERR(osd_seq))
1000                 GOTO(cleanup, rc = PTR_ERR(osd_seq));
1001
1002         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1003         d = osd_seq->oos_dirs[dirn];
1004         LASSERT(d);
1005
1006         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1007         rc = osd_obj_del_entry(info, osd, d, name, th);
1008 cleanup:
1009         RETURN(rc);
1010 }
1011
1012 int osd_obj_map_update(struct osd_thread_info *info,
1013                        struct osd_device *osd,
1014                        const struct lu_fid *fid,
1015                        const struct osd_inode_id *id,
1016                        struct thandle *th)
1017 {
1018         struct osd_obj_seq      *osd_seq;
1019         struct dentry           *d;
1020         struct ost_id           *ostid = &info->oti_ostid;
1021         int                     dirn, rc = 0;
1022         char                    name[32];
1023         ENTRY;
1024
1025         fid_to_ostid(fid, ostid);
1026         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1027         if (IS_ERR(osd_seq))
1028                 RETURN(PTR_ERR(osd_seq));
1029
1030         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1031         d = osd_seq->oos_dirs[dirn];
1032         LASSERT(d);
1033
1034         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1035         rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1036
1037         RETURN(rc);
1038 }
1039
1040 int osd_obj_map_recover(struct osd_thread_info *info,
1041                         struct osd_device *osd,
1042                         struct inode *src_parent,
1043                         struct dentry *src_child,
1044                         const struct lu_fid *fid)
1045 {
1046         struct osd_obj_seq         *osd_seq;
1047         struct dentry              *tgt_parent;
1048         struct dentry              *tgt_child = &info->oti_child_dentry;
1049         struct inode               *dir;
1050         struct inode               *inode     = src_child->d_inode;
1051         struct ost_id              *ostid     = &info->oti_ostid;
1052         handle_t                   *jh;
1053         struct ldiskfs_dir_entry_2 *de;
1054         struct buffer_head         *bh;
1055         char                        name[32];
1056         int                         dirn;
1057         int                         rc        = 0;
1058         ENTRY;
1059
1060         if (fid_is_last_id(fid)) {
1061                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1062                 if (IS_ERR(osd_seq))
1063                         RETURN(PTR_ERR(osd_seq));
1064
1065                 tgt_parent = osd_seq->oos_root;
1066                 tgt_child->d_name.name = "LAST_ID";
1067                 tgt_child->d_name.len = strlen("LAST_ID");
1068         } else {
1069                 fid_to_ostid(fid, ostid);
1070                 osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1071                 if (IS_ERR(osd_seq))
1072                         RETURN(PTR_ERR(osd_seq));
1073
1074                 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1075                 tgt_parent = osd_seq->oos_dirs[dirn];
1076                 osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1077                 tgt_child->d_name.name = name;
1078                 tgt_child->d_name.len = strlen(name);
1079         }
1080         LASSERT(tgt_parent != NULL);
1081
1082         dir = tgt_parent->d_inode;
1083         tgt_child->d_name.hash = 0;
1084         tgt_child->d_parent = tgt_parent;
1085         tgt_child->d_inode = inode;
1086
1087         /* The non-initialized src_child may be destroyed. */
1088         jh = ldiskfs_journal_start_sb(osd_sb(osd),
1089                                 osd_dto_credits_noquota[DTO_INDEX_DELETE] +
1090                                 osd_dto_credits_noquota[DTO_INDEX_INSERT] +
1091                                 osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
1092         if (IS_ERR(jh))
1093                 RETURN(PTR_ERR(jh));
1094
1095         ll_vfs_dq_init(src_parent);
1096         ll_vfs_dq_init(dir);
1097
1098         mutex_lock(&src_parent->i_mutex);
1099         mutex_lock(&dir->i_mutex);
1100         bh = osd_ldiskfs_find_entry(dir, tgt_child, &de, NULL);
1101         if (bh != NULL) {
1102                 /* XXX: If some other object occupied the same slot. And If such
1103                  *      inode is zero-sized and with SUID+SGID, then means it is
1104                  *      a new created one. Maybe we can remove it and insert the
1105                  *      original one back to the /O/<seq>/d<x>. But there are
1106                  *      something to be considered:
1107                  *
1108                  *      1) The OST-object under /lost+found has crashed LMA.
1109                  *         So it should not conflict with the current one.
1110                  *
1111                  *      2) There are race conditions that: someone may just want
1112                  *         to modify the current one. Even if the OI scrub takes
1113                  *         the object lock when remove the current one, it still
1114                  *         cause the modification to be lost becasue the target
1115                  *         has been removed when the RPC service thread waiting
1116                  *         for the lock.
1117                  *
1118                  *      So keep it there before we have suitable solution. */
1119                 brelse(bh);
1120                 mutex_unlock(&dir->i_mutex);
1121
1122                 rc = -EEXIST;
1123                 /* If the src object has never been modified, then remove it. */
1124                 if (inode->i_size == 0 && inode->i_mode & S_ISUID &&
1125                     inode->i_mode & S_ISGID) {
1126                         bh = osd_ldiskfs_find_entry(src_parent, src_child, &de,
1127                                                     NULL);
1128                         if (unlikely(bh == NULL)) {
1129                                 mutex_unlock(&src_parent->i_mutex);
1130                                 ldiskfs_journal_stop(jh);
1131                                 RETURN(0);
1132                         }
1133
1134                         rc = ldiskfs_delete_entry(jh, src_parent, de, bh);
1135                         brelse(bh);
1136                         if (rc == 0) {
1137                                 drop_nlink(inode);
1138                                 ll_dirty_inode(inode, I_DIRTY_DATASYNC);
1139                         }
1140                 }
1141                 mutex_unlock(&src_parent->i_mutex);
1142                 ldiskfs_journal_stop(jh);
1143                 RETURN(rc);
1144         }
1145
1146         bh = osd_ldiskfs_find_entry(src_parent, src_child, &de, NULL);
1147         if (unlikely(bh == NULL))
1148                 GOTO(unlock, rc = -ENOENT);
1149
1150         rc = ldiskfs_delete_entry(jh, src_parent, de, bh);
1151         brelse(bh);
1152         if (rc != 0)
1153                 GOTO(unlock, rc);
1154
1155         rc = osd_ldiskfs_add_entry(jh, tgt_child, inode, NULL);
1156
1157         GOTO(unlock, rc);
1158
1159 unlock:
1160         mutex_unlock(&dir->i_mutex);
1161         mutex_unlock(&src_parent->i_mutex);
1162         ldiskfs_journal_stop(jh);
1163         return rc;
1164 }
1165
1166 static struct dentry *
1167 osd_object_spec_find(struct osd_thread_info *info, struct osd_device *osd,
1168                      const struct lu_fid *fid, char **name)
1169 {
1170         struct dentry *root = ERR_PTR(-ENOENT);
1171
1172         if (fid_is_last_id(fid)) {
1173                 struct osd_obj_seq *osd_seq;
1174
1175                 /* on creation of LAST_ID we create O/<seq> hierarchy */
1176                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1177                 if (IS_ERR(osd_seq))
1178                         RETURN((struct dentry *)osd_seq);
1179
1180                 *name = "LAST_ID";
1181                 root = osd_seq->oos_root;
1182         } else {
1183                 *name = osd_lf_fid2name(fid);
1184                 if (*name == NULL)
1185                         CWARN("UNKNOWN COMPAT FID "DFID"\n", PFID(fid));
1186                 else if ((*name)[0])
1187                         root = osd_sb(osd)->s_root;
1188         }
1189
1190         return root;
1191 }
1192
1193 int osd_obj_spec_update(struct osd_thread_info *info, struct osd_device *osd,
1194                         const struct lu_fid *fid, const struct osd_inode_id *id,
1195                         struct thandle *th)
1196 {
1197         struct dentry   *root;
1198         char            *name;
1199         int              rc;
1200         ENTRY;
1201
1202         root = osd_object_spec_find(info, osd, fid, &name);
1203         if (!IS_ERR(root)) {
1204                 rc = osd_obj_update_entry(info, osd, root, name, fid, id, th);
1205         } else {
1206                 rc = PTR_ERR(root);
1207                 if (rc == -ENOENT)
1208                         rc = 1;
1209         }
1210
1211         RETURN(rc);
1212 }
1213
1214 int osd_obj_spec_insert(struct osd_thread_info *info, struct osd_device *osd,
1215                         const struct lu_fid *fid, const struct osd_inode_id *id,
1216                         struct thandle *th)
1217 {
1218         struct dentry   *root;
1219         char            *name;
1220         int              rc;
1221         ENTRY;
1222
1223         root = osd_object_spec_find(info, osd, fid, &name);
1224         if (!IS_ERR(root)) {
1225                 rc = osd_obj_add_entry(info, osd, root, name, id, th);
1226         } else {
1227                 rc = PTR_ERR(root);
1228                 if (rc == -ENOENT)
1229                         rc = 0;
1230         }
1231
1232         RETURN(rc);
1233 }
1234
1235 int osd_obj_spec_lookup(struct osd_thread_info *info, struct osd_device *osd,
1236                         const struct lu_fid *fid, struct osd_inode_id *id)
1237 {
1238         struct dentry   *root;
1239         struct dentry   *dentry;
1240         struct inode    *inode;
1241         char            *name;
1242         int             rc = -ENOENT;
1243         ENTRY;
1244
1245         if (fid_is_last_id(fid)) {
1246                 struct osd_obj_seq *osd_seq;
1247
1248                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1249                 if (IS_ERR(osd_seq))
1250                         RETURN(PTR_ERR(osd_seq));
1251                 root = osd_seq->oos_root;
1252                 name = "LAST_ID";
1253         } else {
1254                 root = osd_sb(osd)->s_root;
1255                 name = osd_lf_fid2name(fid);
1256                 if (name == NULL || strlen(name) == 0)
1257                         RETURN(-ENOENT);
1258         }
1259
1260         dentry = ll_lookup_one_len(name, root, strlen(name));
1261         if (!IS_ERR(dentry)) {
1262                 inode = dentry->d_inode;
1263                 if (inode) {
1264                         if (is_bad_inode(inode)) {
1265                                 rc = -EIO;
1266                         } else {
1267                                 osd_id_gen(id, inode->i_ino,
1268                                            inode->i_generation);
1269                                 rc = 0;
1270                         }
1271                 }
1272                 /* if dentry is accessible after osd_compat_spec_insert it
1273                  * will still contain NULL inode, so don't keep it in cache */
1274                 d_invalidate(dentry);
1275                 dput(dentry);
1276         }
1277
1278         RETURN(rc);
1279 }