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, 2015, 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_mdt_attrs;
 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, lma);
 232         if (rc != 0)
 233                 RETURN(rc);
 234
 235         lma->lma_incompat |= LMAI_REMOTE_PARENT;
 236         lustre_lma_swab(lma);
 237         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 238                              sizeof(*lma), XATTR_REPLACE);
 239         if (rc != 0)
 240                 RETURN(rc);
 241
 242         parent = omm->omm_remote_parent;
 243         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 244         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 245                                            name, strlen(name));
 246         mutex_lock(&parent->d_inode->i_mutex);
 247         rc = osd_ldiskfs_add_entry(info, osd, oh->ot_handle, dentry,
 248                                    obj->oo_inode, NULL);
 249         CDEBUG(D_INODE, "%s: add %s:%lu to remote parent %lu.\n", osd_name(osd),
 250                name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
 251         ldiskfs_inc_count(oh->ot_handle, parent->d_inode);
 252         mark_inode_dirty(parent->d_inode);
 253         mutex_unlock(&parent->d_inode->i_mutex);
 254         RETURN(rc);
 255 }
 256
 257 int osd_delete_from_remote_parent(const struct lu_env *env,
 258                                   struct osd_device *osd,
 259                                   struct osd_object *obj,
 260                                   struct osd_thandle *oh)
 261 {
 262         struct osd_mdobj_map       *omm = osd->od_mdt_map;
 263         struct osd_thread_info     *oti = osd_oti_get(env);
 264         struct lustre_mdt_attrs    *lma = &oti->oti_mdt_attrs;
 265         char                       *name = oti->oti_name;
 266         struct dentry              *dentry;
 267         struct dentry              *parent;
 268         struct ldiskfs_dir_entry_2 *de;
 269         struct buffer_head         *bh;
 270         int                        rc;
 271
 272         /* Check lma to see whether it is remote object */
 273         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry, lma);
 274         if (rc != 0)
 275                 RETURN(rc);
 276
 277         if (likely(!(lma->lma_incompat & LMAI_REMOTE_PARENT)))
 278                 RETURN(0);
 279
 280         parent = omm->omm_remote_parent;
 281         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 282         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 283                                            name, strlen(name));
 284         mutex_lock(&parent->d_inode->i_mutex);
 285         bh = osd_ldiskfs_find_entry(parent->d_inode, &dentry->d_name, &de,
 286                                     NULL, NULL);
 287         if (IS_ERR(bh)) {
 288                 mutex_unlock(&parent->d_inode->i_mutex);
 289                 RETURN(PTR_ERR(bh));
 290         }
 291         CDEBUG(D_INODE, "%s: el %s:%lu to remote parent %lu.\n", osd_name(osd),
 292                name, obj->oo_inode->i_ino, parent->d_inode->i_ino);
 293         rc = ldiskfs_delete_entry(oh->ot_handle, parent->d_inode, de, bh);
 294         ldiskfs_dec_count(oh->ot_handle, parent->d_inode);
 295         mark_inode_dirty(parent->d_inode);
 296         mutex_unlock(&parent->d_inode->i_mutex);
 297         brelse(bh);
 298
 299         /* Get rid of REMOTE_PARENT flag from incompat */
 300         lma->lma_incompat &= ~LMAI_REMOTE_PARENT;
 301         lustre_lma_swab(lma);
 302         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 303                              sizeof(*lma), XATTR_REPLACE);
 304         RETURN(rc);
 305 }
 306
 307 int osd_lookup_in_remote_parent(struct osd_thread_info *oti,
 308                                 struct osd_device *osd,
 309                                 const struct lu_fid *fid,
 310                                 struct osd_inode_id *id)
 311 {
 312         struct osd_mdobj_map        *omm = osd->od_mdt_map;
 313         char                        *name = oti->oti_name;
 314         struct dentry               *parent;
 315         struct dentry               *dentry;
 316         struct ldiskfs_dir_entry_2 *de;
 317         struct buffer_head         *bh;
 318         int                         rc;
 319         ENTRY;
 320
 321         parent = omm->omm_remote_parent;
 322         sprintf(name, DFID_NOBRACE, PFID(fid));
 323         dentry = osd_child_dentry_by_inode(oti->oti_env, parent->d_inode,
 324                                            name, strlen(name));
 325         mutex_lock(&parent->d_inode->i_mutex);
 326         bh = osd_ldiskfs_find_entry(parent->d_inode, &dentry->d_name, &de,
 327                                     NULL, NULL);
 328         if (IS_ERR(bh)) {
 329                 rc = PTR_ERR(bh);
 330         } else {
 331                 struct inode *inode;
 332
 333                 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 334                 brelse(bh);
 335                 inode = osd_iget(oti, osd, id);
 336                 if (IS_ERR(inode)) {
 337                         rc = PTR_ERR(inode);
 338                         if (rc == -ESTALE)
 339                                 rc = -ENOENT;
 340                 } else {
 341                         iput(inode);
 342                         rc = 0;
 343                 }
 344         }
 345         mutex_unlock(&parent->d_inode->i_mutex);
 346         if (rc == 0)
 347                 osd_add_oi_cache(oti, osd, id, fid);
 348         RETURN(rc);
 349 }
 350
 351 /*
 352  * directory structure on legacy OST:
 353  *
 354  * O/<seq>/d0-31/<objid>
 355  * O/<seq>/LAST_ID
 356  * last_rcvd
 357  * LAST_GROUP
 358  * CONFIGS
 359  *
 360  */
 361 static int osd_ost_init(const struct lu_env *env, struct osd_device *dev)
 362 {
 363         struct lvfs_run_ctxt     new;
 364         struct lvfs_run_ctxt     save;
 365         struct dentry           *rootd = osd_sb(dev)->s_root;
 366         struct dentry           *d;
 367         struct osd_thread_info  *info = osd_oti_get(env);
 368         struct inode            *inode;
 369         struct lu_fid           *fid = &info->oti_fid3;
 370         int                      rc;
 371         ENTRY;
 372
 373         OBD_ALLOC_PTR(dev->od_ost_map);
 374         if (dev->od_ost_map == NULL)
 375                 RETURN(-ENOMEM);
 376
 377         /* to get subdir count from last_rcvd */
 378         rc = osd_last_rcvd_subdir_count(dev);
 379         if (rc < 0)
 380                 GOTO(cleanup_alloc, rc);
 381
 382         dev->od_ost_map->om_subdir_count = rc;
 383         rc = 0;
 384
 385         INIT_LIST_HEAD(&dev->od_ost_map->om_seq_list);
 386         rwlock_init(&dev->od_ost_map->om_seq_list_lock);
 387         mutex_init(&dev->od_ost_map->om_dir_init_mutex);
 388
 389         osd_push_ctxt(dev, &new, &save);
 390
 391         d = ll_lookup_one_len("O", rootd, strlen("O"));
 392         if (IS_ERR(d))
 393                 GOTO(cleanup_ctxt, rc = PTR_ERR(d));
 394         if (d->d_inode == NULL) {
 395                 dput(d);
 396                 /* The lookup() may be called again inside simple_mkdir().
 397                  * Since the repeated lookup() only be called for "/O" at
 398                  * mount time, it will not affect the whole performance. */
 399                 d = simple_mkdir(rootd, dev->od_mnt, "O", 0755, 1);
 400                 if (IS_ERR(d))
 401                         GOTO(cleanup_ctxt, rc = PTR_ERR(d));
 402
 403                 /* It is quite probably that the device is new formatted. */
 404                 dev->od_maybe_new = 1;
 405         }
 406
 407         inode = d->d_inode;
 408         dev->od_ost_map->om_root = d;
 409
 410         /* 'What the @fid is' is not imporatant, because the object
 411          * has no OI mapping, and only is visible inside the OSD.*/
 412         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 413         rc = osd_ea_fid_set(info, inode, fid,
 414                     LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 415         if (rc)
 416                 GOTO(cleanup_dentry, rc);
 417
 418         pop_ctxt(&save, &new);
 419         RETURN(0);
 420
 421 cleanup_dentry:
 422         dput(d);
 423 cleanup_ctxt:
 424         pop_ctxt(&save, &new);
 425 cleanup_alloc:
 426         OBD_FREE_PTR(dev->od_ost_map);
 427         return rc;
 428 }
 429
 430 static void osd_seq_free(struct osd_obj_seq *osd_seq)
 431 {
 432         int j;
 433
 434         if (osd_seq->oos_dirs) {
 435                 for (j = 0; j < osd_seq->oos_subdir_count; j++) {
 436                         if (osd_seq->oos_dirs[j])
 437                                 dput(osd_seq->oos_dirs[j]);
 438                 }
 439                 OBD_FREE(osd_seq->oos_dirs,
 440                          sizeof(struct dentry *) * osd_seq->oos_subdir_count);
 441         }
 442
 443         if (osd_seq->oos_root)
 444                 dput(osd_seq->oos_root);
 445
 446         OBD_FREE_PTR(osd_seq);
 447 }
 448
 449 static void osd_ost_fini(struct osd_device *osd)
 450 {
 451         struct osd_obj_seq    *osd_seq;
 452         struct osd_obj_seq    *tmp;
 453         struct osd_obj_map    *map = osd->od_ost_map;
 454         ENTRY;
 455
 456         if (map == NULL)
 457                 return;
 458
 459         write_lock(&map->om_seq_list_lock);
 460         list_for_each_entry_safe(osd_seq, tmp, &map->om_seq_list,
 461                                  oos_seq_list) {
 462                 list_del_init(&osd_seq->oos_seq_list);
 463                 write_unlock(&map->om_seq_list_lock);
 464                 osd_seq_free(osd_seq);
 465                 write_lock(&map->om_seq_list_lock);
 466         }
 467         write_unlock(&map->om_seq_list_lock);
 468         if (map->om_root)
 469                 dput(map->om_root);
 470         OBD_FREE_PTR(map);
 471         osd->od_ost_map = NULL;
 472         EXIT;
 473 }
 474
 475 int osd_obj_map_init(const struct lu_env *env, struct osd_device *dev)
 476 {
 477         int rc;
 478         ENTRY;
 479
 480         /* prepare structures for OST */
 481         rc = osd_ost_init(env, dev);
 482         if (rc)
 483                 RETURN(rc);
 484
 485         /* prepare structures for MDS */
 486         rc = osd_mdt_init(env, dev);
 487         if (rc)
 488                 osd_ost_fini(dev);
 489
 490         RETURN(rc);
 491 }
 492
 493 static struct osd_obj_seq *osd_seq_find_locked(struct osd_obj_map *map, u64 seq)
 494 {
 495         struct osd_obj_seq *osd_seq;
 496
 497         list_for_each_entry(osd_seq, &map->om_seq_list, oos_seq_list) {
 498                 if (osd_seq->oos_seq == seq)
 499                         return osd_seq;
 500         }
 501         return NULL;
 502 }
 503
 504 static struct osd_obj_seq *osd_seq_find(struct osd_obj_map *map, u64 seq)
 505 {
 506         struct osd_obj_seq *osd_seq;
 507
 508         read_lock(&map->om_seq_list_lock);
 509         osd_seq = osd_seq_find_locked(map, seq);
 510         read_unlock(&map->om_seq_list_lock);
 511         return osd_seq;
 512 }
 513
 514 void osd_obj_map_fini(struct osd_device *dev)
 515 {
 516         osd_ost_fini(dev);
 517         osd_mdt_fini(dev);
 518 }
 519
 520 /**
 521  * Update the specified OI mapping.
 522  *
 523  * \retval   1, changed nothing
 524  * \retval   0, changed successfully
 525  * \retval -ve, on error
 526  */
 527 static int osd_obj_update_entry(struct osd_thread_info *info,
 528                                 struct osd_device *osd,
 529                                 struct dentry *dir, const char *name,
 530                                 const struct lu_fid *fid,
 531                                 const struct osd_inode_id *id,
 532                                 handle_t *th)
 533 {
 534         struct inode               *parent = dir->d_inode;
 535         struct dentry              *child;
 536         struct ldiskfs_dir_entry_2 *de;
 537         struct buffer_head         *bh;
 538         struct inode               *inode;
 539         struct dentry              *dentry = &info->oti_obj_dentry;
 540         struct osd_inode_id        *oi_id  = &info->oti_id3;
 541         struct lustre_mdt_attrs    *lma    = &info->oti_mdt_attrs;
 542         struct lu_fid              *oi_fid = &lma->lma_self_fid;
 543         int                         rc;
 544         ENTRY;
 545
 546         LASSERT(th != NULL);
 547         LASSERT(th->h_transaction != NULL);
 548
 549         child = &info->oti_child_dentry;
 550         child->d_parent = dir;
 551         child->d_name.hash = 0;
 552         child->d_name.name = name;
 553         child->d_name.len = strlen(name);
 554
 555         ll_vfs_dq_init(parent);
 556         mutex_lock(&parent->i_mutex);
 557         bh = osd_ldiskfs_find_entry(parent, &child->d_name, &de, NULL, NULL);
 558         if (IS_ERR(bh))
 559                 GOTO(out, rc = PTR_ERR(bh));
 560
 561         if (le32_to_cpu(de->inode) == id->oii_ino)
 562                 GOTO(out, rc = 1);
 563
 564         osd_id_gen(oi_id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 565         inode = osd_iget(info, osd, oi_id);
 566         if (IS_ERR(inode)) {
 567                 rc = PTR_ERR(inode);
 568                 if (rc == -ENOENT || rc == -ESTALE)
 569                         goto update;
 570                 GOTO(out, rc);
 571         }
 572
 573         /* The EA inode should NOT be in OI, old OI scrub may added
 574          * such OI mapping by wrong, replace it. */
 575         if (unlikely(osd_is_ea_inode(inode))) {
 576                 iput(inode);
 577                 goto update;
 578         }
 579
 580         rc = osd_get_lma(info, inode, dentry, lma);
 581         if (rc == -ENODATA) {
 582                 rc = osd_get_idif(info, inode, dentry, oi_fid);
 583                 if (rc > 0 || rc == -ENODATA) {
 584                         oi_fid = NULL;
 585                         rc = 0;
 586                 }
 587         }
 588         iput(inode);
 589
 590         if (rc != 0)
 591                 GOTO(out, rc);
 592
 593         /* If the OST-object has neither FID-in-LMA nor FID-in-ff, it is
 594          * either a crashed object or a uninitialized one. Replace it. */
 595         if (oi_fid != NULL && 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         if (fid_is_idif(fid) && oi_fid != NULL && fid_is_idif(oi_fid)) {
 604                 __u32 idx1 = fid_idif_ost_idx(fid);
 605                 __u32 idx2 = fid_idif_ost_idx(oi_fid);
 606                 struct ost_id *ostid = &info->oti_ostid;
 607                 struct lu_fid *tfid = &info->oti_fid3;
 608
 609                 LASSERTF(idx1 == 0 || idx1 == osd->od_index,
 610                          "invalid given FID "DFID", not match the "
 611                          "device index %u\n", PFID(fid), osd->od_index);
 612
 613                 if (idx1 != idx2) {
 614                         if (idx1 == 0 && idx2 == osd->od_index) {
 615                                 fid_to_ostid(fid, ostid);
 616                                 ostid_to_fid(tfid, ostid, idx2);
 617                                 if (lu_fid_eq(tfid, oi_fid)) {
 618                                         CERROR("%s: the FID "DFID" is used by "
 619                                                "two objects(2): %u/%u %u/%u\n",
 620                                                osd_name(osd), PFID(fid),
 621                                                oi_id->oii_ino, oi_id->oii_gen,
 622                                                id->oii_ino, id->oii_gen);
 623
 624                                         GOTO(out, rc = -EEXIST);
 625                                 }
 626                         } else if (idx2 == 0 && idx1 == osd->od_index) {
 627                                 fid_to_ostid(oi_fid, ostid);
 628                                 ostid_to_fid(tfid, ostid, idx1);
 629                                 if (lu_fid_eq(tfid, fid)) {
 630                                         CERROR("%s: the FID "DFID" is used by "
 631                                                "two objects(2): %u/%u %u/%u\n",
 632                                                osd_name(osd), PFID(fid),
 633                                                oi_id->oii_ino, oi_id->oii_gen,
 634                                                id->oii_ino, id->oii_gen);
 635
 636                                         GOTO(out, rc = -EEXIST);
 637                                 }
 638                         }
 639                 }
 640         }
 641
 642 update:
 643         /* There may be temporary inconsistency: On one hand, the new
 644          * object may be referenced by multiple entries, which is out
 645          * of our control unless we traverse the whole /O completely,
 646          * which is non-flat order and inefficient, should be avoided;
 647          * On the other hand, the old object may become orphan if it
 648          * is still valid. Since it was referenced by an invalid entry,
 649          * making it as invisible temporary may be not worse. OI scrub
 650          * will process it later. */
 651         rc = ldiskfs_journal_get_write_access(th, bh);
 652         if (rc != 0)
 653                 GOTO(out, rc);
 654
 655         de->inode = cpu_to_le32(id->oii_ino);
 656         rc = ldiskfs_handle_dirty_metadata(th, NULL, bh);
 657
 658         GOTO(out, rc);
 659
 660 out:
 661         if (!IS_ERR(bh))
 662                 brelse(bh);
 663         mutex_unlock(&parent->i_mutex);
 664         return rc;
 665 }
 666
 667 static int osd_obj_del_entry(struct osd_thread_info *info,
 668                              struct osd_device *osd,
 669                              struct dentry *dird, char *name,
 670                              handle_t *th)
 671 {
 672         struct ldiskfs_dir_entry_2 *de;
 673         struct buffer_head         *bh;
 674         struct dentry              *child;
 675         struct inode               *dir = dird->d_inode;
 676         int                         rc;
 677         ENTRY;
 678
 679         LASSERT(th != NULL);
 680         LASSERT(th->h_transaction != NULL);
 681
 682
 683         child = &info->oti_child_dentry;
 684         child->d_name.hash = 0;
 685         child->d_name.name = name;
 686         child->d_name.len = strlen(name);
 687         child->d_parent = dird;
 688         child->d_inode = NULL;
 689
 690         ll_vfs_dq_init(dir);
 691         mutex_lock(&dir->i_mutex);
 692         bh = osd_ldiskfs_find_entry(dir, &child->d_name, &de, NULL, NULL);
 693         if (IS_ERR(bh)) {
 694                 rc = PTR_ERR(bh);
 695         } else {
 696                 rc = ldiskfs_delete_entry(th, dir, de, bh);
 697                 brelse(bh);
 698         }
 699         mutex_unlock(&dir->i_mutex);
 700
 701         RETURN(rc);
 702 }
 703
 704 static int osd_obj_add_entry(struct osd_thread_info *info,
 705                              struct osd_device *osd,
 706                              struct dentry *dir, char *name,
 707                              const struct osd_inode_id *id,
 708                              handle_t *th)
 709 {
 710         struct dentry *child;
 711         struct inode *inode;
 712         int rc;
 713
 714         ENTRY;
 715
 716         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_NO_ENTRY))
 717                 RETURN(0);
 718
 719         LASSERT(th != NULL);
 720         LASSERT(th->h_transaction != NULL);
 721
 722         inode = info->oti_inode;
 723         if (unlikely(inode == NULL)) {
 724                 struct ldiskfs_inode_info *lii;
 725                 OBD_ALLOC_PTR(lii);
 726                 if (lii == NULL)
 727                         RETURN(-ENOMEM);
 728                 inode = info->oti_inode = &lii->vfs_inode;
 729         }
 730
 731         inode->i_sb = osd_sb(osd);
 732         osd_id_to_inode(inode, id);
 733         inode->i_mode = S_IFREG; /* for type in ldiskfs dir entry */
 734
 735         child = &info->oti_child_dentry;
 736         child->d_name.hash = 0;
 737         child->d_name.name = name;
 738         child->d_name.len = strlen(name);
 739         child->d_parent = dir;
 740         child->d_inode = inode;
 741
 742         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
 743                 inode->i_ino++;
 744
 745         ll_vfs_dq_init(dir->d_inode);
 746         mutex_lock(&dir->d_inode->i_mutex);
 747         rc = osd_ldiskfs_add_entry(info, osd, th, child, inode, NULL);
 748         mutex_unlock(&dir->d_inode->i_mutex);
 749
 750         RETURN(rc);
 751 }
 752
 753 /**
 754  * Use %llu for legacy OST sequences, but use %llx for new
 755  * sequences names, so that the O/{seq}/dN/{oid} more closely
 756  * follows the DFID/PFID format. This makes it easier to map from
 757  * debug messages to objects in the future, and the legacy space
 758  * of FID_SEQ_OST_MDT0 will be unused in the future.
 759  **/
 760 static inline void osd_seq_name(char *seq_name, size_t name_size, u64 seq)
 761 {
 762         snprintf(seq_name, name_size,
 763                  (fid_seq_is_rsvd(seq) ||
 764                   fid_seq_is_mdt0(seq)) ? "%llu" : "%llx",
 765                  fid_seq_is_idif(seq) ? 0 : seq);
 766 }
 767
 768 static inline void osd_oid_name(char *name, size_t name_size,
 769                                 const struct lu_fid *fid, u64 id)
 770 {
 771         snprintf(name, name_size,
 772                  (fid_seq_is_rsvd(fid_seq(fid)) ||
 773                   fid_seq_is_mdt0(fid_seq(fid)) ||
 774                   fid_seq_is_idif(fid_seq(fid))) ? "%llu" : "%llx", id);
 775 }
 776
 777 /* external locking is required */
 778 static int osd_seq_load_locked(struct osd_thread_info *info,
 779                                struct osd_device *osd,
 780                                struct osd_obj_seq *osd_seq)
 781 {
 782         struct osd_obj_map  *map = osd->od_ost_map;
 783         struct dentry       *seq_dir;
 784         struct inode        *inode;
 785         struct lu_fid       *fid = &info->oti_fid3;
 786         int                 rc = 0;
 787         int                 i;
 788         char                dir_name[32];
 789         ENTRY;
 790
 791         if (osd_seq->oos_root != NULL)
 792                 RETURN(0);
 793
 794         LASSERT(map);
 795         LASSERT(map->om_root);
 796
 797         osd_seq_name(dir_name, sizeof(dir_name), osd_seq->oos_seq);
 798
 799         seq_dir = simple_mkdir(map->om_root, osd->od_mnt, dir_name, 0755, 1);
 800         if (IS_ERR(seq_dir))
 801                 GOTO(out_err, rc = PTR_ERR(seq_dir));
 802         else if (seq_dir->d_inode == NULL)
 803                 GOTO(out_put, rc = -EFAULT);
 804
 805         inode = seq_dir->d_inode;
 806         osd_seq->oos_root = seq_dir;
 807
 808         /* 'What the @fid is' is not imporatant, because the object
 809          * has no OI mapping, and only is visible inside the OSD.*/
 810         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 811         rc = osd_ea_fid_set(info, inode, fid,
 812                             LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 813         if (rc != 0)
 814                 GOTO(out_put, rc);
 815
 816         LASSERT(osd_seq->oos_dirs == NULL);
 817         OBD_ALLOC(osd_seq->oos_dirs,
 818                   sizeof(seq_dir) * osd_seq->oos_subdir_count);
 819         if (osd_seq->oos_dirs == NULL)
 820                 GOTO(out_put, rc = -ENOMEM);
 821
 822         for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 823                 struct dentry   *dir;
 824
 825                 snprintf(dir_name, sizeof(dir_name), "d%u", i);
 826                 dir = simple_mkdir(osd_seq->oos_root, osd->od_mnt, dir_name,
 827                                    0700, 1);
 828                 if (IS_ERR(dir)) {
 829                         GOTO(out_free, rc = PTR_ERR(dir));
 830                 } else if (dir->d_inode == NULL) {
 831                         dput(dir);
 832                         GOTO(out_free, rc = -EFAULT);
 833                 }
 834
 835                 inode = dir->d_inode;
 836                 osd_seq->oos_dirs[i] = dir;
 837
 838                 /* 'What the @fid is' is not imporatant, because the object
 839                  * has no OI mapping, and only is visible inside the OSD.*/
 840                 lu_igif_build(fid, inode->i_ino, inode->i_generation);
 841                 rc = osd_ea_fid_set(info, inode, fid,
 842                                     LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0);
 843                 if (rc != 0)
 844                         GOTO(out_free, rc);
 845         }
 846
 847         if (rc != 0) {
 848 out_free:
 849                 for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 850                         if (osd_seq->oos_dirs[i] != NULL)
 851                                 dput(osd_seq->oos_dirs[i]);
 852                 }
 853                 OBD_FREE(osd_seq->oos_dirs,
 854                          sizeof(seq_dir) * osd_seq->oos_subdir_count);
 855 out_put:
 856                 dput(seq_dir);
 857                 osd_seq->oos_root = NULL;
 858         }
 859 out_err:
 860         RETURN(rc);
 861 }
 862
 863 static struct osd_obj_seq *osd_seq_load(struct osd_thread_info *info,
 864                                         struct osd_device *osd, u64 seq)
 865 {
 866         struct osd_obj_map      *map;
 867         struct osd_obj_seq      *osd_seq;
 868         int                     rc = 0;
 869         ENTRY;
 870
 871         map = osd->od_ost_map;
 872         LASSERT(map);
 873         LASSERT(map->om_root);
 874
 875         osd_seq = osd_seq_find(map, seq);
 876         if (likely(osd_seq != NULL))
 877                 RETURN(osd_seq);
 878
 879         /* Serializing init process */
 880         mutex_lock(&map->om_dir_init_mutex);
 881
 882         /* Check whether the seq has been added */
 883         read_lock(&map->om_seq_list_lock);
 884         osd_seq = osd_seq_find_locked(map, seq);
 885         if (osd_seq != NULL) {
 886                 read_unlock(&map->om_seq_list_lock);
 887                 GOTO(cleanup, rc = 0);
 888         }
 889         read_unlock(&map->om_seq_list_lock);
 890
 891         OBD_ALLOC_PTR(osd_seq);
 892         if (osd_seq == NULL)
 893                 GOTO(cleanup, rc = -ENOMEM);
 894
 895         INIT_LIST_HEAD(&osd_seq->oos_seq_list);
 896         osd_seq->oos_seq = seq;
 897         /* Init subdir count to be 32, but each seq can have
 898          * different subdir count */
 899         osd_seq->oos_subdir_count = map->om_subdir_count;
 900         rc = osd_seq_load_locked(info, osd, osd_seq);
 901         if (rc != 0)
 902                 GOTO(cleanup, rc);
 903
 904         write_lock(&map->om_seq_list_lock);
 905         list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
 906         write_unlock(&map->om_seq_list_lock);
 907
 908 cleanup:
 909         mutex_unlock(&map->om_dir_init_mutex);
 910         if (rc != 0) {
 911                 if (osd_seq != NULL)
 912                         OBD_FREE_PTR(osd_seq);
 913                 RETURN(ERR_PTR(rc));
 914         }
 915
 916         RETURN(osd_seq);
 917 }
 918
 919 int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
 920                        const struct lu_fid *fid, struct osd_inode_id *id)
 921 {
 922         struct osd_obj_map              *map;
 923         struct osd_obj_seq              *osd_seq;
 924         struct dentry                   *d_seq;
 925         struct dentry                   *child;
 926         struct ost_id                   *ostid = &info->oti_ostid;
 927         int                             dirn;
 928         char                            name[32];
 929         struct ldiskfs_dir_entry_2      *de;
 930         struct buffer_head              *bh;
 931         struct inode                    *dir;
 932         struct inode                    *inode;
 933         ENTRY;
 934
 935         /* on the very first lookup we find and open directories */
 936
 937         map = dev->od_ost_map;
 938         LASSERT(map);
 939         LASSERT(map->om_root);
 940
 941         fid_to_ostid(fid, ostid);
 942         osd_seq = osd_seq_load(info, dev, ostid_seq(ostid));
 943         if (IS_ERR(osd_seq))
 944                 RETURN(PTR_ERR(osd_seq));
 945
 946         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
 947         d_seq = osd_seq->oos_dirs[dirn];
 948         LASSERT(d_seq);
 949
 950         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
 951
 952         child = &info->oti_child_dentry;
 953         child->d_parent = d_seq;
 954         child->d_name.hash = 0;
 955         child->d_name.name = name;
 956         /* XXX: we can use rc from sprintf() instead of strlen() */
 957         child->d_name.len = strlen(name);
 958
 959         dir = d_seq->d_inode;
 960         mutex_lock(&dir->i_mutex);
 961         bh = osd_ldiskfs_find_entry(dir, &child->d_name, &de, NULL, NULL);
 962         mutex_unlock(&dir->i_mutex);
 963
 964         if (IS_ERR(bh))
 965                 RETURN(PTR_ERR(bh));
 966
 967         osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 968         brelse(bh);
 969
 970         inode = osd_iget(info, dev, id);
 971         if (IS_ERR(inode)) {
 972                 int rc = PTR_ERR(inode);
 973
 974                 RETURN(rc == -ENOENT ? -ESTALE : rc);
 975         }
 976
 977         iput(inode);
 978         RETURN(0);
 979 }
 980
 981 int osd_obj_map_insert(struct osd_thread_info *info,
 982                        struct osd_device *osd,
 983                        const struct lu_fid *fid,
 984                        const struct osd_inode_id *id,
 985                        handle_t *th)
 986 {
 987         struct osd_obj_map      *map;
 988         struct osd_obj_seq      *osd_seq;
 989         struct dentry           *d;
 990         struct ost_id           *ostid = &info->oti_ostid;
 991         u64                      oid;
 992         int                     dirn, rc = 0;
 993         char                    name[32];
 994         ENTRY;
 995
 996         map = osd->od_ost_map;
 997         LASSERT(map);
 998
 999         /* map fid to seq:objid */
1000         fid_to_ostid(fid, ostid);
1001
1002         oid = ostid_id(ostid);
1003         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1004         if (IS_ERR(osd_seq))
1005                 RETURN(PTR_ERR(osd_seq));
1006
1007         dirn = oid & (osd_seq->oos_subdir_count - 1);
1008         d = osd_seq->oos_dirs[dirn];
1009         LASSERT(d);
1010
1011         osd_oid_name(name, sizeof(name), fid, oid);
1012
1013 again:
1014         rc = osd_obj_add_entry(info, osd, d, name, id, th);
1015         if (rc == -EEXIST) {
1016                 rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1017                 if (unlikely(rc == -ENOENT))
1018                         goto again;
1019
1020                 if (unlikely(rc == 1))
1021                         RETURN(0);
1022         }
1023
1024         RETURN(rc);
1025 }
1026
1027 int osd_obj_map_delete(struct osd_thread_info *info, struct osd_device *osd,
1028                        const struct lu_fid *fid, handle_t *th)
1029 {
1030         struct osd_obj_map      *map;
1031         struct osd_obj_seq      *osd_seq;
1032         struct dentry           *d;
1033         struct ost_id           *ostid = &info->oti_ostid;
1034         int                     dirn, rc = 0;
1035         char                    name[32];
1036         ENTRY;
1037
1038         map = osd->od_ost_map;
1039         LASSERT(map);
1040
1041         /* map fid to seq:objid */
1042         fid_to_ostid(fid, ostid);
1043
1044         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1045         if (IS_ERR(osd_seq))
1046                 GOTO(cleanup, rc = PTR_ERR(osd_seq));
1047
1048         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1049         d = osd_seq->oos_dirs[dirn];
1050         LASSERT(d);
1051
1052         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1053         rc = osd_obj_del_entry(info, osd, d, name, th);
1054 cleanup:
1055         RETURN(rc);
1056 }
1057
1058 int osd_obj_map_update(struct osd_thread_info *info,
1059                        struct osd_device *osd,
1060                        const struct lu_fid *fid,
1061                        const struct osd_inode_id *id,
1062                        handle_t *th)
1063 {
1064         struct osd_obj_seq      *osd_seq;
1065         struct dentry           *d;
1066         struct ost_id           *ostid = &info->oti_ostid;
1067         int                     dirn, rc = 0;
1068         char                    name[32];
1069         ENTRY;
1070
1071         fid_to_ostid(fid, ostid);
1072         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1073         if (IS_ERR(osd_seq))
1074                 RETURN(PTR_ERR(osd_seq));
1075
1076         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1077         d = osd_seq->oos_dirs[dirn];
1078         LASSERT(d);
1079
1080         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1081         rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1082
1083         RETURN(rc);
1084 }
1085
1086 int osd_obj_map_recover(struct osd_thread_info *info,
1087                         struct osd_device *osd,
1088                         struct inode *src_parent,
1089                         struct dentry *src_child,
1090                         const struct lu_fid *fid)
1091 {
1092         struct osd_obj_seq         *osd_seq;
1093         struct dentry              *tgt_parent;
1094         struct dentry              *tgt_child = &info->oti_child_dentry;
1095         struct inode               *dir;
1096         struct inode               *inode     = src_child->d_inode;
1097         struct ost_id              *ostid     = &info->oti_ostid;
1098         handle_t                   *jh;
1099         struct ldiskfs_dir_entry_2 *de;
1100         struct buffer_head         *bh;
1101         char                        name[32];
1102         int                         dirn;
1103         int                         rc        = 0;
1104         ENTRY;
1105
1106         if (fid_is_last_id(fid)) {
1107                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1108                 if (IS_ERR(osd_seq))
1109                         RETURN(PTR_ERR(osd_seq));
1110
1111                 tgt_parent = osd_seq->oos_root;
1112                 tgt_child->d_name.name = "LAST_ID";
1113                 tgt_child->d_name.len = strlen("LAST_ID");
1114         } else {
1115                 fid_to_ostid(fid, ostid);
1116                 osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1117                 if (IS_ERR(osd_seq))
1118                         RETURN(PTR_ERR(osd_seq));
1119
1120                 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1121                 tgt_parent = osd_seq->oos_dirs[dirn];
1122                 osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1123                 tgt_child->d_name.name = name;
1124                 tgt_child->d_name.len = strlen(name);
1125         }
1126         LASSERT(tgt_parent != NULL);
1127
1128         dir = tgt_parent->d_inode;
1129         tgt_child->d_name.hash = 0;
1130         tgt_child->d_parent = tgt_parent;
1131         tgt_child->d_inode = inode;
1132
1133         /* The non-initialized src_child may be destroyed. */
1134         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
1135                                 osd_dto_credits_noquota[DTO_INDEX_DELETE] +
1136                                 osd_dto_credits_noquota[DTO_INDEX_INSERT] +
1137                                 osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
1138         if (IS_ERR(jh))
1139                 RETURN(PTR_ERR(jh));
1140
1141         ll_vfs_dq_init(src_parent);
1142         ll_vfs_dq_init(dir);
1143
1144         mutex_lock(&src_parent->i_mutex);
1145         mutex_lock(&dir->i_mutex);
1146         bh = osd_ldiskfs_find_entry(dir, &tgt_child->d_name, &de, NULL, NULL);
1147         if (!IS_ERR(bh)) {
1148                 /* XXX: If some other object occupied the same slot. And If such
1149                  *      inode is zero-sized and with SUID+SGID, then means it is
1150                  *      a new created one. Maybe we can remove it and insert the
1151                  *      original one back to the /O/<seq>/d<x>. But there are
1152                  *      something to be considered:
1153                  *
1154                  *      1) The OST-object under /lost+found has crashed LMA.
1155                  *         So it should not conflict with the current one.
1156                  *
1157                  *      2) There are race conditions that: someone may just want
1158                  *         to modify the current one. Even if the OI scrub takes
1159                  *         the object lock when remove the current one, it still
1160                  *         cause the modification to be lost becasue the target
1161                  *         has been removed when the RPC service thread waiting
1162                  *         for the lock.
1163                  *
1164                  *      So keep it there before we have suitable solution. */
1165                 brelse(bh);
1166                 mutex_unlock(&dir->i_mutex);
1167                 mutex_unlock(&src_parent->i_mutex);
1168                 ldiskfs_journal_stop(jh);
1169
1170                 rc = -EEXIST;
1171                 /* If the src object has never been modified, then remove it. */
1172                 if (inode->i_size == 0 && inode->i_mode & S_ISUID &&
1173                     inode->i_mode & S_ISGID) {
1174                         rc = ll_vfs_unlink(src_parent, src_child);
1175                         if (unlikely(rc == -ENOENT))
1176                                 rc = 0;
1177                 }
1178                 RETURN(rc);
1179         }
1180
1181         bh = osd_ldiskfs_find_entry(src_parent, &src_child->d_name, &de,
1182                                     NULL, NULL);
1183         if (unlikely(IS_ERR(bh)))
1184                 GOTO(unlock, rc = PTR_ERR(bh));
1185
1186         rc = ldiskfs_delete_entry(jh, src_parent, de, bh);
1187         brelse(bh);
1188         if (rc != 0)
1189                 GOTO(unlock, rc);
1190
1191         rc = osd_ldiskfs_add_entry(info, osd, jh, tgt_child, inode, NULL);
1192
1193         GOTO(unlock, rc);
1194
1195 unlock:
1196         mutex_unlock(&dir->i_mutex);
1197         mutex_unlock(&src_parent->i_mutex);
1198         ldiskfs_journal_stop(jh);
1199         return rc;
1200 }
1201
1202 static struct dentry *
1203 osd_object_spec_find(struct osd_thread_info *info, struct osd_device *osd,
1204                      const struct lu_fid *fid, char **name)
1205 {
1206         struct dentry *root = ERR_PTR(-ENOENT);
1207
1208         if (fid_is_last_id(fid)) {
1209                 struct osd_obj_seq *osd_seq;
1210
1211                 /* on creation of LAST_ID we create O/<seq> hierarchy */
1212                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1213                 if (IS_ERR(osd_seq))
1214                         RETURN((struct dentry *)osd_seq);
1215
1216                 *name = "LAST_ID";
1217                 root = osd_seq->oos_root;
1218         } else {
1219                 *name = osd_lf_fid2name(fid);
1220                 if (*name == NULL)
1221                         CWARN("UNKNOWN COMPAT FID "DFID"\n", PFID(fid));
1222                 else if ((*name)[0])
1223                         root = osd_sb(osd)->s_root;
1224         }
1225
1226         return root;
1227 }
1228
1229 int osd_obj_spec_update(struct osd_thread_info *info, struct osd_device *osd,
1230                         const struct lu_fid *fid, const struct osd_inode_id *id,
1231                         handle_t *th)
1232 {
1233         struct dentry   *root;
1234         char            *name = NULL;
1235         int              rc;
1236         ENTRY;
1237
1238         root = osd_object_spec_find(info, osd, fid, &name);
1239         if (!IS_ERR(root)) {
1240                 rc = osd_obj_update_entry(info, osd, root, name, fid, id, th);
1241         } else {
1242                 rc = PTR_ERR(root);
1243                 if (rc == -ENOENT)
1244                         rc = 1;
1245         }
1246
1247         RETURN(rc);
1248 }
1249
1250 int osd_obj_spec_insert(struct osd_thread_info *info, struct osd_device *osd,
1251                         const struct lu_fid *fid, const struct osd_inode_id *id,
1252                         handle_t *th)
1253 {
1254         struct dentry   *root;
1255         char            *name = NULL;
1256         int              rc;
1257         ENTRY;
1258
1259         root = osd_object_spec_find(info, osd, fid, &name);
1260         if (!IS_ERR(root)) {
1261                 rc = osd_obj_add_entry(info, osd, root, name, id, th);
1262         } else {
1263                 rc = PTR_ERR(root);
1264                 if (rc == -ENOENT)
1265                         rc = 0;
1266         }
1267
1268         RETURN(rc);
1269 }
1270
1271 int osd_obj_spec_lookup(struct osd_thread_info *info, struct osd_device *osd,
1272                         const struct lu_fid *fid, struct osd_inode_id *id)
1273 {
1274         struct dentry   *root;
1275         struct dentry   *dentry;
1276         struct inode    *inode;
1277         char            *name = NULL;
1278         int             rc = -ENOENT;
1279         ENTRY;
1280
1281         if (fid_is_last_id(fid)) {
1282                 struct osd_obj_seq *osd_seq;
1283
1284                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1285                 if (IS_ERR(osd_seq))
1286                         RETURN(PTR_ERR(osd_seq));
1287                 root = osd_seq->oos_root;
1288                 name = "LAST_ID";
1289         } else {
1290                 root = osd_sb(osd)->s_root;
1291                 name = osd_lf_fid2name(fid);
1292                 if (name == NULL || strlen(name) == 0)
1293                         RETURN(-ENOENT);
1294         }
1295
1296         dentry = ll_lookup_one_len(name, root, strlen(name));
1297         if (!IS_ERR(dentry)) {
1298                 inode = dentry->d_inode;
1299                 if (inode) {
1300                         if (is_bad_inode(inode)) {
1301                                 rc = -EIO;
1302                         } else {
1303                                 osd_id_gen(id, inode->i_ino,
1304                                            inode->i_generation);
1305                                 rc = 0;
1306                         }
1307                 }
1308                 /* if dentry is accessible after osd_compat_spec_insert it
1309                  * will still contain NULL inode, so don't keep it in cache */
1310                 d_invalidate(dentry);
1311                 dput(dentry);
1312         }
1313
1314         RETURN(rc);
1315 }