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, 2017, 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 /* prerequisite for linux/xattr.h */
  40 #include <linux/types.h>
  41 /* prerequisite for linux/xattr.h */
  42 #include <linux/fs.h>
  43 /* XATTR_{REPLACE,CREATE} */
  44 #include <linux/xattr.h>
  45
  46 /*
  47  * struct OBD_{ALLOC,FREE}*()
  48  * OBD_FAIL_CHECK
  49  */
  50 #include <obd_support.h>
  51
  52 #include "osd_internal.h"
  53 #include "osd_oi.h"
  54
  55 static void osd_push_ctxt(const struct osd_device *dev,
  56                           struct lvfs_run_ctxt *newctxt,
  57                           struct lvfs_run_ctxt *save)
  58 {
  59         OBD_SET_CTXT_MAGIC(newctxt);
  60         newctxt->pwdmnt = dev->od_mnt;
  61         newctxt->pwd = dev->od_mnt->mnt_root;
  62         newctxt->umask = current_umask();
  63         newctxt->dt = NULL;
  64
  65         push_ctxt(save, newctxt);
  66 }
  67
  68 struct dentry *osd_lookup_one_len_common(struct osd_device *dev,
  69                                          const char *name,
  70                                          struct dentry *base, int len,
  71                                          enum oi_check_flags flags)
  72 {
  73         struct dentry *dchild;
  74
  75         /*
  76          * We can't use inode_is_locked() directly since we can't know
  77          * if the current thread context took the lock earlier or if
  78          * another thread context took the lock. OI_LOCKED tells us
  79          * if the current thread context has already taken the lock.
  80          */
  81         if (!(flags & OI_LOCKED)) {
  82                 /* If another thread took this lock already we will
  83                  * just have to wait until the other thread is done.
  84                  */
  85                 inode_lock(base->d_inode);
  86                 dchild = lookup_one_len(name, base, len);
  87                 inode_unlock(base->d_inode);
  88         } else {
  89                 /* This thread context already has taken the lock.
  90                  * Other threads will have to wait until we are done.
  91                  */
  92                 dchild = lookup_one_len(name, base, len);
  93         }
  94         if (IS_ERR(dchild))
  95                 return dchild;
  96
  97         if (dchild->d_inode && unlikely(is_bad_inode(dchild->d_inode))) {
  98                 CERROR("%s: bad inode returned %lu/%u: rc = -ENOENT\n",
  99                        osd_name(dev), dchild->d_inode->i_ino,
 100                        dchild->d_inode->i_generation);
 101                 dput(dchild);
 102                 dchild = ERR_PTR(-ENOENT);
 103         }
 104
 105         return dchild;
 106 }
 107
 108 /**
 109  * osd_lookup_one_len_unlocked
 110  *
 111  * @dev:        obd device we are searching
 112  * @name:       pathname component to lookup
 113  * @base:       base directory to lookup from
 114  * @len:        maximum length @len should be interpreted to
 115  *
 116  * Unlike osd_lookup_one_len, this should be called without the parent
 117  * i_mutex held, and will take the i_mutex itself.
 118  */
 119 struct dentry *osd_lookup_one_len_unlocked(struct osd_device *dev,
 120                                            const char *name,
 121                                            struct dentry *base, int len)
 122 {
 123         return osd_lookup_one_len_common(dev, name, base, len, ~OI_LOCKED);
 124 }
 125
 126 /**
 127  * osd_lookup_one_len - lookup single pathname component
 128  *
 129  * @dev:        obd device we are searching
 130  * @name:       pathname component to lookup
 131  * @base:       base directory to lookup from
 132  * @len:        maximum length @len should be interpreted to
 133  *
 134  * The caller must hold inode lock
 135  */
 136 struct dentry *osd_lookup_one_len(struct osd_device *dev, const char *name,
 137                                   struct dentry *base, int len)
 138 {
 139         return osd_lookup_one_len_common(dev, name, base, len, OI_LOCKED);
 140 }
 141
 142 /* utility to make a directory */
 143 static struct dentry *
 144 simple_mkdir(const struct lu_env *env, struct osd_device *osd,
 145              struct dentry *dir, const struct lu_fid *fid,
 146              const char *name, __u32 compat, int mode, bool *created)
 147 {
 148         struct osd_thread_info *info = osd_oti_get(env);
 149         struct lu_fid *tfid = &info->oti_fid3;
 150         struct inode *inode;
 151         struct dentry *dchild;
 152         int err = 0;
 153
 154         ENTRY;
 155
 156         // ASSERT_KERNEL_CTXT("kernel doing mkdir outside kernel context\n");
 157         CDEBUG(D_INODE, "creating directory %.*s\n", (int)strlen(name), name);
 158         dchild = osd_lookup_one_len_unlocked(osd, name, dir, strlen(name));
 159         if (IS_ERR(dchild))
 160                 RETURN(dchild);
 161
 162         inode = dchild->d_inode;
 163         if (inode) {
 164                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
 165                 int old_mode = inode->i_mode;
 166
 167                 if (created)
 168                         *created = false;
 169
 170                 if (!S_ISDIR(old_mode)) {
 171                         CERROR("found %s (%lu/%u) is mode %o\n", name,
 172                                inode->i_ino, inode->i_generation, old_mode);
 173                         GOTO(out_err, err = -ENOTDIR);
 174                 }
 175
 176                 if (unlikely(osd->od_dt_dev.dd_rdonly))
 177                         RETURN(dchild);
 178
 179                 /* Fixup directory permissions if necessary */
 180                 if ((old_mode & S_IALLUGO) != (mode & S_IALLUGO)) {
 181                         CDEBUG(D_CONFIG,
 182                                "fixing permissions on %s from %o to %o\n",
 183                                name, old_mode, mode);
 184                         inode->i_mode = (mode & S_IALLUGO) |
 185                                         (old_mode & ~S_IALLUGO);
 186                         mark_inode_dirty(inode);
 187                 }
 188
 189                 err = osd_get_lma(info, inode, &info->oti_obj_dentry,
 190                                   &info->oti_ost_attrs);
 191                 if (err == -ENODATA)
 192                         goto set_fid;
 193
 194                 if (err)
 195                         GOTO(out_err, err);
 196
 197                 if ((fid && !lu_fid_eq(fid, &lma->lma_self_fid)) ||
 198                     lma->lma_compat != compat)
 199                         goto set_fid;
 200
 201                 RETURN(dchild);
 202         }
 203
 204         err = vfs_mkdir(dir->d_inode, dchild, mode);
 205         if (err)
 206                 GOTO(out_err, err);
 207
 208         inode = dchild->d_inode;
 209         if (created)
 210                 *created = true;
 211
 212 set_fid:
 213         if (fid)
 214                 *tfid = *fid;
 215         else
 216                 lu_igif_build(tfid, inode->i_ino, inode->i_generation);
 217         err = osd_ea_fid_set(info, inode, tfid, compat, 0);
 218         if (err)
 219                 GOTO(out_err, err);
 220
 221         RETURN(dchild);
 222
 223 out_err:
 224         dput(dchild);
 225         return ERR_PTR(err);
 226 }
 227
 228 static int osd_last_rcvd_subdir_count(struct osd_device *osd)
 229 {
 230         struct lr_server_data lsd;
 231         struct dentry *dlast;
 232         loff_t off;
 233         int rc = 0;
 234         int count = OBJ_SUBDIR_COUNT;
 235
 236         ENTRY;
 237
 238         dlast = osd_lookup_one_len_unlocked(osd, LAST_RCVD, osd_sb(osd)->s_root,
 239                                             strlen(LAST_RCVD));
 240         if (IS_ERR(dlast))
 241                 return PTR_ERR(dlast);
 242         else if (dlast->d_inode == NULL)
 243                 goto out;
 244
 245         off = 0;
 246         rc = osd_ldiskfs_read(dlast->d_inode, &lsd, sizeof(lsd), &off);
 247         if (rc == sizeof(lsd)) {
 248                 CDEBUG(D_INFO,
 249                       "read last_rcvd header, uuid = %s, subdir count = %d\n",
 250                       lsd.lsd_uuid, lsd.lsd_subdir_count);
 251                 if (le16_to_cpu(lsd.lsd_subdir_count) > 0)
 252                         count = le16_to_cpu(lsd.lsd_subdir_count);
 253         } else if (rc != 0) {
 254                 CERROR("Can't read last_rcvd file, rc = %d\n", rc);
 255                 if (rc > 0)
 256                         rc = -EFAULT;
 257                 dput(dlast);
 258                 return rc;
 259         }
 260 out:
 261         dput(dlast);
 262         LASSERT(count > 0);
 263         return count;
 264 }
 265
 266 static int osd_mdt_init(const struct lu_env *env, struct osd_device *dev)
 267 {
 268         struct lvfs_run_ctxt new;
 269         struct lvfs_run_ctxt save;
 270         struct dentry *parent;
 271         struct osd_mdobj_map *omm;
 272         struct dentry *d;
 273         struct osd_thread_info *info = osd_oti_get(env);
 274         struct lu_fid *fid = &info->oti_fid3;
 275         int rc = 0;
 276
 277         ENTRY;
 278
 279         OBD_ALLOC_PTR(dev->od_mdt_map);
 280         if (dev->od_mdt_map == NULL)
 281                 RETURN(-ENOMEM);
 282
 283         omm = dev->od_mdt_map;
 284
 285         parent = osd_sb(dev)->s_root;
 286         osd_push_ctxt(dev, &new, &save);
 287
 288         lu_local_obj_fid(fid, REMOTE_PARENT_DIR_OID);
 289         d = simple_mkdir(env, dev, parent, fid, REMOTE_PARENT_DIR,
 290                          LMAC_NOT_IN_OI, 0755, NULL);
 291         if (IS_ERR(d))
 292                 GOTO(cleanup, rc = PTR_ERR(d));
 293
 294         omm->omm_remote_parent = d;
 295
 296         GOTO(cleanup, rc = 0);
 297
 298 cleanup:
 299         pop_ctxt(&save, &new);
 300         if (rc) {
 301                 if (omm->omm_remote_parent != NULL)
 302                         dput(omm->omm_remote_parent);
 303                 OBD_FREE_PTR(omm);
 304                 dev->od_mdt_map = NULL;
 305         }
 306         return rc;
 307 }
 308
 309 static void osd_mdt_fini(struct osd_device *osd)
 310 {
 311         struct osd_mdobj_map *omm = osd->od_mdt_map;
 312
 313         if (omm == NULL)
 314                 return;
 315
 316         if (omm->omm_remote_parent)
 317                 dput(omm->omm_remote_parent);
 318
 319         OBD_FREE_PTR(omm);
 320         osd->od_ost_map = NULL;
 321 }
 322
 323 int osd_add_to_remote_parent(const struct lu_env *env, struct osd_device *osd,
 324                              struct osd_object *obj, struct osd_thandle *oh)
 325 {
 326         struct osd_mdobj_map *omm = osd->od_mdt_map;
 327         struct osd_thread_info *oti = osd_oti_get(env);
 328         struct lustre_mdt_attrs *lma = &oti->oti_ost_attrs.loa_lma;
 329         char *name = oti->oti_name;
 330         struct osd_thread_info *info = osd_oti_get(env);
 331         struct dentry *dentry;
 332         struct dentry *parent;
 333         int rc;
 334
 335         if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_NO_AGENTENT))
 336                 RETURN(0);
 337
 338         /*
 339          * Set REMOTE_PARENT in lma, so other process like unlink or lfsck
 340          * can identify this object quickly
 341          */
 342         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry,
 343                          &oti->oti_ost_attrs);
 344         if (rc)
 345                 RETURN(rc);
 346
 347         lma->lma_incompat |= LMAI_REMOTE_PARENT;
 348         lustre_lma_swab(lma);
 349         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 350                              sizeof(*lma), XATTR_REPLACE);
 351         if (rc)
 352                 RETURN(rc);
 353
 354         parent = omm->omm_remote_parent;
 355         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 356         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 357                                            name, strlen(name));
 358         inode_lock(parent->d_inode);
 359         rc = osd_ldiskfs_add_entry(info, osd, oh->ot_handle, dentry,
 360                                    obj->oo_inode, NULL);
 361         if (!rc && S_ISDIR(obj->oo_inode->i_mode))
 362                 ldiskfs_inc_count(oh->ot_handle, parent->d_inode);
 363         else if (unlikely(rc == -EEXIST))
 364                 rc = 0;
 365         if (!rc)
 366                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
 367         CDEBUG(D_INODE, "%s: create agent entry for %s: rc = %d\n",
 368                osd_name(osd), name, rc);
 369         mark_inode_dirty(parent->d_inode);
 370         inode_unlock(parent->d_inode);
 371         RETURN(rc);
 372 }
 373
 374 int osd_delete_from_remote_parent(const struct lu_env *env,
 375                                   struct osd_device *osd,
 376                                   struct osd_object *obj,
 377                                   struct osd_thandle *oh, bool destroy)
 378 {
 379         struct osd_mdobj_map *omm = osd->od_mdt_map;
 380         struct osd_thread_info *oti = osd_oti_get(env);
 381         struct lustre_mdt_attrs *lma = &oti->oti_ost_attrs.loa_lma;
 382         char *name = oti->oti_name;
 383         struct dentry *dentry;
 384         struct dentry *parent;
 385         struct ldiskfs_dir_entry_2 *de;
 386         struct buffer_head *bh;
 387         int rc;
 388
 389         parent = omm->omm_remote_parent;
 390         sprintf(name, DFID_NOBRACE, PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 391         dentry = osd_child_dentry_by_inode(env, parent->d_inode,
 392                                            name, strlen(name));
 393         inode_lock(parent->d_inode);
 394         bh = osd_ldiskfs_find_entry(parent->d_inode, &dentry->d_name, &de,
 395                                     NULL, NULL);
 396         if (IS_ERR(bh)) {
 397                 inode_unlock(parent->d_inode);
 398                 rc = PTR_ERR(bh);
 399                 if (unlikely(rc == -ENOENT))
 400                         rc = 0;
 401         } else {
 402                 rc = ldiskfs_delete_entry(oh->ot_handle, parent->d_inode,
 403                                           de, bh);
 404                 if (!rc && S_ISDIR(obj->oo_inode->i_mode))
 405                         ldiskfs_dec_count(oh->ot_handle, parent->d_inode);
 406                 mark_inode_dirty(parent->d_inode);
 407                 inode_unlock(parent->d_inode);
 408                 brelse(bh);
 409                 CDEBUG(D_INODE, "%s: remove agent entry for %s: rc = %d\n",
 410                        osd_name(osd), name, rc);
 411         }
 412
 413         if (destroy || rc) {
 414                 if (!rc)
 415                         lu_object_clear_agent_entry(&obj->oo_dt.do_lu);
 416
 417                 RETURN(rc);
 418         }
 419
 420         rc = osd_get_lma(oti, obj->oo_inode, &oti->oti_obj_dentry,
 421                          &oti->oti_ost_attrs);
 422         if (rc)
 423                 RETURN(rc);
 424
 425         /* Get rid of REMOTE_PARENT flag from incompat */
 426         lma->lma_incompat &= ~LMAI_REMOTE_PARENT;
 427         lustre_lma_swab(lma);
 428         rc = __osd_xattr_set(oti, obj->oo_inode, XATTR_NAME_LMA, lma,
 429                              sizeof(*lma), XATTR_REPLACE);
 430         if (!rc)
 431                 lu_object_clear_agent_entry(&obj->oo_dt.do_lu);
 432         RETURN(rc);
 433 }
 434
 435 int osd_lookup_in_remote_parent(struct osd_thread_info *oti,
 436                                 struct osd_device *osd,
 437                                 const struct lu_fid *fid,
 438                                 struct osd_inode_id *id)
 439 {
 440         struct osd_mdobj_map *omm = osd->od_mdt_map;
 441         char *name = oti->oti_name;
 442         struct dentry *parent;
 443         struct dentry *dentry;
 444         struct ldiskfs_dir_entry_2 *de;
 445         struct buffer_head *bh;
 446         int rc;
 447
 448         ENTRY;
 449
 450         if (unlikely(osd->od_is_ost))
 451                 RETURN(-ENOENT);
 452
 453         parent = omm->omm_remote_parent;
 454         sprintf(name, DFID_NOBRACE, PFID(fid));
 455         dentry = osd_child_dentry_by_inode(oti->oti_env, parent->d_inode,
 456                                            name, strlen(name));
 457         inode_lock(parent->d_inode);
 458         bh = osd_ldiskfs_find_entry(parent->d_inode, &dentry->d_name, &de,
 459                                     NULL, NULL);
 460         if (IS_ERR(bh)) {
 461                 rc = PTR_ERR(bh);
 462         } else {
 463                 struct inode *inode;
 464
 465                 osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 466                 brelse(bh);
 467                 inode = osd_iget(oti, osd, id);
 468                 if (IS_ERR(inode)) {
 469                         rc = PTR_ERR(inode);
 470                         if (rc == -ESTALE)
 471                                 rc = -ENOENT;
 472                 } else {
 473                         iput(inode);
 474                         rc = 0;
 475                 }
 476         }
 477         inode_unlock(parent->d_inode);
 478         if (rc == 0)
 479                 osd_add_oi_cache(oti, osd, id, fid);
 480         RETURN(rc);
 481 }
 482
 483 /*
 484  * directory structure on legacy OST:
 485  *
 486  * O/<seq>/d0-31/<objid>
 487  * O/<seq>/LAST_ID
 488  * last_rcvd
 489  * LAST_GROUP
 490  * CONFIGS
 491  *
 492  */
 493 static int osd_ost_init(const struct lu_env *env, struct osd_device *dev)
 494 {
 495         struct lvfs_run_ctxt new;
 496         struct lvfs_run_ctxt save;
 497         struct dentry *d;
 498         int rc;
 499         bool created = false;
 500
 501         ENTRY;
 502
 503         OBD_ALLOC_PTR(dev->od_ost_map);
 504         if (dev->od_ost_map == NULL)
 505                 RETURN(-ENOMEM);
 506
 507         /* to get subdir count from last_rcvd */
 508         rc = osd_last_rcvd_subdir_count(dev);
 509         if (rc < 0)
 510                 GOTO(cleanup_alloc, rc);
 511
 512         dev->od_ost_map->om_subdir_count = rc;
 513         INIT_LIST_HEAD(&dev->od_ost_map->om_seq_list);
 514         rwlock_init(&dev->od_ost_map->om_seq_list_lock);
 515         mutex_init(&dev->od_ost_map->om_dir_init_mutex);
 516
 517         osd_push_ctxt(dev, &new, &save);
 518         d = simple_mkdir(env, dev, osd_sb(dev)->s_root, NULL, "O",
 519                          LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0755, &created);
 520         if (IS_ERR(d))
 521                 GOTO(cleanup_ctxt, rc = PTR_ERR(d));
 522
 523         if (created)
 524                 /* It is quite probably that the device is new formatted. */
 525                 dev->od_maybe_new = 1;
 526
 527         dev->od_ost_map->om_root = d;
 528
 529         pop_ctxt(&save, &new);
 530         RETURN(0);
 531
 532 cleanup_ctxt:
 533         pop_ctxt(&save, &new);
 534 cleanup_alloc:
 535         OBD_FREE_PTR(dev->od_ost_map);
 536         return rc;
 537 }
 538
 539 static void osd_seq_free(struct osd_obj_seq *osd_seq)
 540 {
 541         int j;
 542
 543         if (osd_seq->oos_dirs) {
 544                 for (j = 0; j < osd_seq->oos_subdir_count; j++) {
 545                         if (osd_seq->oos_dirs[j])
 546                                 dput(osd_seq->oos_dirs[j]);
 547                 }
 548                 OBD_FREE_PTR_ARRAY(osd_seq->oos_dirs,
 549                                    osd_seq->oos_subdir_count);
 550         }
 551
 552         if (osd_seq->oos_root)
 553                 dput(osd_seq->oos_root);
 554
 555         OBD_FREE_PTR(osd_seq);
 556 }
 557
 558 static void osd_ost_fini(struct osd_device *osd)
 559 {
 560         struct osd_obj_seq *osd_seq;
 561         struct osd_obj_seq *tmp;
 562         struct osd_obj_map *map = osd->od_ost_map;
 563
 564         ENTRY;
 565
 566         if (map == NULL)
 567                 return;
 568
 569         write_lock(&map->om_seq_list_lock);
 570         list_for_each_entry_safe(osd_seq, tmp, &map->om_seq_list,
 571                                  oos_seq_list) {
 572                 list_del_init(&osd_seq->oos_seq_list);
 573                 write_unlock(&map->om_seq_list_lock);
 574                 osd_seq_free(osd_seq);
 575                 write_lock(&map->om_seq_list_lock);
 576         }
 577         write_unlock(&map->om_seq_list_lock);
 578         if (map->om_root)
 579                 dput(map->om_root);
 580         OBD_FREE_PTR(map);
 581         osd->od_ost_map = NULL;
 582         EXIT;
 583 }
 584
 585 static int osd_index_backup_dir_init(const struct lu_env *env,
 586                                      struct osd_device *dev)
 587 {
 588         struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
 589         struct lvfs_run_ctxt new;
 590         struct lvfs_run_ctxt save;
 591         struct dentry *dentry;
 592         int rc = 0;
 593
 594         ENTRY;
 595
 596         lu_local_obj_fid(fid, INDEX_BACKUP_OID);
 597         osd_push_ctxt(dev, &new, &save);
 598         dentry = simple_mkdir(env, dev, osd_sb(dev)->s_root, fid,
 599                               INDEX_BACKUP_DIR, LMAC_NOT_IN_OI, 0755, NULL);
 600         if (IS_ERR(dentry)) {
 601                 rc = PTR_ERR(dentry);
 602         } else {
 603                 dev->od_index_backup_inode = igrab(dentry->d_inode);
 604                 dput(dentry);
 605         }
 606         pop_ctxt(&save, &new);
 607
 608         RETURN(rc);
 609 }
 610
 611 static void osd_index_backup_dir_fini(struct osd_device *dev)
 612 {
 613         iput(dev->od_index_backup_inode);
 614         dev->od_index_backup_inode = NULL;
 615 }
 616
 617 int osd_obj_map_init(const struct lu_env *env, struct osd_device *dev)
 618 {
 619         int rc;
 620         bool mdt_init = false;
 621
 622         ENTRY;
 623
 624         rc = osd_ost_init(env, dev);
 625         if (rc)
 626                 RETURN(rc);
 627
 628         if (!dev->od_is_ost) {
 629                 rc = osd_mdt_init(env, dev);
 630                 if (rc) {
 631                         osd_ost_fini(dev);
 632                         RETURN(rc);
 633                 }
 634
 635                 mdt_init = true;
 636         }
 637
 638         rc = osd_index_backup_dir_init(env, dev);
 639         if (rc) {
 640                 osd_ost_fini(dev);
 641                 if (mdt_init)
 642                         osd_mdt_fini(dev);
 643         }
 644
 645         RETURN(rc);
 646 }
 647
 648 static struct osd_obj_seq *osd_seq_find_locked(struct osd_obj_map *map, u64 seq)
 649 {
 650         struct osd_obj_seq *osd_seq;
 651
 652         list_for_each_entry(osd_seq, &map->om_seq_list, oos_seq_list) {
 653                 if (osd_seq->oos_seq == seq)
 654                         return osd_seq;
 655         }
 656         return NULL;
 657 }
 658
 659 static struct osd_obj_seq *osd_seq_find(struct osd_obj_map *map, u64 seq)
 660 {
 661         struct osd_obj_seq *osd_seq;
 662
 663         read_lock(&map->om_seq_list_lock);
 664         osd_seq = osd_seq_find_locked(map, seq);
 665         read_unlock(&map->om_seq_list_lock);
 666         return osd_seq;
 667 }
 668
 669 void osd_obj_map_fini(struct osd_device *dev)
 670 {
 671         osd_index_backup_dir_fini(dev);
 672         osd_ost_fini(dev);
 673         osd_mdt_fini(dev);
 674 }
 675
 676 /**
 677  * Update the specified OI mapping.
 678  *
 679  * \retval   1, changed nothing
 680  * \retval   0, changed successfully
 681  * \retval -ve, on error
 682  */
 683 static int osd_obj_update_entry(struct osd_thread_info *info,
 684                                 struct osd_device *osd,
 685                                 struct dentry *dir, const char *name,
 686                                 const struct lu_fid *fid,
 687                                 const struct osd_inode_id *id,
 688                                 handle_t *th)
 689 {
 690         struct inode *parent = dir->d_inode;
 691         struct dentry *child;
 692         struct ldiskfs_dir_entry_2 *de;
 693         struct buffer_head *bh;
 694         struct inode *inode;
 695         struct dentry *dentry = &info->oti_obj_dentry;
 696         struct osd_inode_id *oi_id = &info->oti_id3;
 697         struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
 698         struct lu_fid *oi_fid = &lma->lma_self_fid;
 699         int rc;
 700
 701         ENTRY;
 702
 703         LASSERT(th != NULL);
 704         LASSERT(th->h_transaction != NULL);
 705
 706         child = &info->oti_child_dentry;
 707         child->d_parent = dir;
 708         child->d_name.hash = 0;
 709         child->d_name.name = name;
 710         child->d_name.len = strlen(name);
 711
 712         dquot_initialize(parent);
 713         inode_lock(parent);
 714         bh = osd_ldiskfs_find_entry(parent, &child->d_name, &de, NULL, NULL);
 715         if (IS_ERR(bh))
 716                 GOTO(out, rc = PTR_ERR(bh));
 717
 718         if (le32_to_cpu(de->inode) == id->oii_ino)
 719                 GOTO(out, rc = 1);
 720
 721         osd_id_gen(oi_id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
 722         inode = osd_iget(info, osd, oi_id);
 723         if (IS_ERR(inode)) {
 724                 rc = PTR_ERR(inode);
 725                 if (rc == -ENOENT || rc == -ESTALE)
 726                         goto update;
 727                 GOTO(out, rc);
 728         }
 729
 730         /*
 731          * The EA inode should NOT be in OI, old OI scrub may added
 732          * such OI mapping by wrong, replace it.
 733          */
 734         if (unlikely(osd_is_ea_inode(inode))) {
 735                 iput(inode);
 736                 goto update;
 737         }
 738
 739         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
 740         if (rc == -ENODATA) {
 741                 rc = osd_get_idif(info, inode, dentry, oi_fid);
 742                 if (rc > 0 || rc == -ENODATA) {
 743                         oi_fid = NULL;
 744                         rc = 0;
 745                 }
 746         }
 747         iput(inode);
 748
 749         if (rc != 0)
 750                 GOTO(out, rc);
 751
 752         /*
 753          * If the OST-object has neither FID-in-LMA nor FID-in-ff, it is
 754          * either a crashed object or a uninitialized one. Replace it.
 755          */
 756         if (oi_fid != NULL && lu_fid_eq(fid, oi_fid)) {
 757                 CERROR("%s: the FID "DFID" is used by two objects: "
 758                        "%u/%u %u/%u\n", osd_name(osd), PFID(fid),
 759                        oi_id->oii_ino, oi_id->oii_gen,
 760                        id->oii_ino, id->oii_gen);
 761                 GOTO(out, rc = -EEXIST);
 762         }
 763
 764         if (fid_is_idif(fid) && oi_fid != NULL && fid_is_idif(oi_fid)) {
 765                 __u32 idx1 = fid_idif_ost_idx(fid);
 766                 __u32 idx2 = fid_idif_ost_idx(oi_fid);
 767                 struct ost_id *ostid = &info->oti_ostid;
 768                 struct lu_fid *tfid = &info->oti_fid3;
 769
 770                 LASSERTF(idx1 == 0 || idx1 == osd->od_index,
 771                          "invalid given FID "DFID", not match the "
 772                          "device index %u\n", PFID(fid), osd->od_index);
 773
 774                 if (idx1 != idx2) {
 775                         if (idx1 == 0 && idx2 == osd->od_index) {
 776                                 fid_to_ostid(fid, ostid);
 777                                 ostid_to_fid(tfid, ostid, idx2);
 778                                 if (lu_fid_eq(tfid, oi_fid)) {
 779                                         CERROR("%s: the FID "DFID" is used by "
 780                                                "two objects(2): %u/%u %u/%u\n",
 781                                                osd_name(osd), PFID(fid),
 782                                                oi_id->oii_ino, oi_id->oii_gen,
 783                                                id->oii_ino, id->oii_gen);
 784
 785                                         GOTO(out, rc = -EEXIST);
 786                                 }
 787                         } else if (idx2 == 0 && idx1 == osd->od_index) {
 788                                 fid_to_ostid(oi_fid, ostid);
 789                                 ostid_to_fid(tfid, ostid, idx1);
 790                                 if (lu_fid_eq(tfid, fid)) {
 791                                         CERROR("%s: the FID "DFID" is used by "
 792                                                "two objects(2): %u/%u %u/%u\n",
 793                                                osd_name(osd), PFID(fid),
 794                                                oi_id->oii_ino, oi_id->oii_gen,
 795                                                id->oii_ino, id->oii_gen);
 796
 797                                         GOTO(out, rc = -EEXIST);
 798                                 }
 799                         }
 800                 }
 801         }
 802
 803 update:
 804         /*
 805          * There may be temporary inconsistency: On one hand, the new
 806          * object may be referenced by multiple entries, which is out
 807          * of our control unless we traverse the whole /O completely,
 808          * which is non-flat order and inefficient, should be avoided;
 809          * On the other hand, the old object may become orphan if it
 810          * is still valid. Since it was referenced by an invalid entry,
 811          * making it as invisible temporary may be not worse. OI scrub
 812          * will process it later.
 813          */
 814         rc = ldiskfs_journal_get_write_access(th, bh);
 815         if (rc != 0)
 816                 GOTO(out, rc);
 817
 818         de->inode = cpu_to_le32(id->oii_ino);
 819         rc = ldiskfs_handle_dirty_metadata(th, NULL, bh);
 820
 821         GOTO(out, rc);
 822
 823 out:
 824         if (!IS_ERR(bh))
 825                 brelse(bh);
 826         inode_unlock(parent);
 827         return rc;
 828 }
 829
 830 static int osd_obj_del_entry(struct osd_thread_info *info,
 831                              struct osd_device *osd,
 832                              struct dentry *dird, char *name,
 833                              handle_t *th)
 834 {
 835         struct ldiskfs_dir_entry_2 *de;
 836         struct buffer_head *bh;
 837         struct dentry *child;
 838         struct inode *dir = dird->d_inode;
 839         int rc;
 840
 841         ENTRY;
 842
 843         LASSERT(th != NULL);
 844         LASSERT(th->h_transaction != NULL);
 845
 846         child = &info->oti_child_dentry;
 847         child->d_name.hash = 0;
 848         child->d_name.name = name;
 849         child->d_name.len = strlen(name);
 850         child->d_parent = dird;
 851         child->d_inode = NULL;
 852
 853         dquot_initialize(dir);
 854         inode_lock(dir);
 855         bh = osd_ldiskfs_find_entry(dir, &child->d_name, &de, NULL, NULL);
 856         if (IS_ERR(bh)) {
 857                 rc = PTR_ERR(bh);
 858         } else {
 859                 rc = ldiskfs_delete_entry(th, dir, de, bh);
 860                 brelse(bh);
 861         }
 862         inode_unlock(dir);
 863
 864         RETURN(rc);
 865 }
 866
 867 static int osd_obj_add_entry(struct osd_thread_info *info,
 868                              struct osd_device *osd,
 869                              struct dentry *dir, char *name,
 870                              const struct osd_inode_id *id,
 871                              handle_t *th)
 872 {
 873         struct dentry *child;
 874         struct inode *inode;
 875         int rc;
 876
 877         ENTRY;
 878
 879         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_NO_ENTRY))
 880                 RETURN(0);
 881
 882         LASSERT(th != NULL);
 883         LASSERT(th->h_transaction != NULL);
 884
 885         inode = info->oti_inode;
 886         if (unlikely(inode == NULL)) {
 887                 struct ldiskfs_inode_info *lii;
 888
 889                 OBD_ALLOC_PTR(lii);
 890                 if (lii == NULL)
 891                         RETURN(-ENOMEM);
 892                 inode = info->oti_inode = &lii->vfs_inode;
 893         }
 894
 895         inode->i_sb = osd_sb(osd);
 896         osd_id_to_inode(inode, id);
 897         inode->i_mode = S_IFREG; /* for type in ldiskfs dir entry */
 898
 899         child = &info->oti_child_dentry;
 900         child->d_name.hash = 0;
 901         child->d_name.name = name;
 902         child->d_name.len = strlen(name);
 903         child->d_parent = dir;
 904         child->d_inode = inode;
 905
 906         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_COMPAT_INVALID_ENTRY))
 907                 inode->i_ino++;
 908
 909         dquot_initialize(dir->d_inode);
 910         inode_lock(dir->d_inode);
 911         rc = osd_ldiskfs_add_entry(info, osd, th, child, inode, NULL);
 912         inode_unlock(dir->d_inode);
 913
 914         RETURN(rc);
 915 }
 916
 917 /**
 918  * Use %llu for legacy OST sequences, but use %llx for new
 919  * sequences names, so that the O/{seq}/dN/{oid} more closely
 920  * follows the DFID/PFID format. This makes it easier to map from
 921  * debug messages to objects in the future, and the legacy space
 922  * of FID_SEQ_OST_MDT0 will be unused in the future.
 923  **/
 924 static inline void osd_seq_name(char *seq_name, size_t name_size, u64 seq)
 925 {
 926         snprintf(seq_name, name_size,
 927                  (fid_seq_is_rsvd(seq) ||
 928                   fid_seq_is_mdt0(seq)) ? "%llu" : "%llx",
 929                  fid_seq_is_idif(seq) ? 0 : seq);
 930 }
 931
 932 static inline void osd_oid_name(char *name, size_t name_size,
 933                                 const struct lu_fid *fid, u64 id)
 934 {
 935         snprintf(name, name_size,
 936                  (fid_seq_is_rsvd(fid_seq(fid)) ||
 937                   fid_seq_is_mdt0(fid_seq(fid)) ||
 938                   fid_seq_is_idif(fid_seq(fid))) ? "%llu" : "%llx", id);
 939 }
 940
 941 /* external locking is required */
 942 static int osd_seq_load_locked(struct osd_thread_info *info,
 943                                struct osd_device *osd,
 944                                struct osd_obj_seq *osd_seq)
 945 {
 946         struct osd_obj_map *map = osd->od_ost_map;
 947         struct dentry *seq_dir;
 948         int rc = 0;
 949         int i;
 950         char dir_name[32];
 951
 952         ENTRY;
 953
 954         if (osd_seq->oos_root != NULL)
 955                 RETURN(0);
 956
 957         LASSERT(map);
 958         LASSERT(map->om_root);
 959
 960         osd_seq_name(dir_name, sizeof(dir_name), osd_seq->oos_seq);
 961
 962         seq_dir = simple_mkdir(info->oti_env, osd, map->om_root, NULL, dir_name,
 963                                LMAC_NOT_IN_OI | LMAC_FID_ON_OST, 0755, NULL);
 964         if (IS_ERR(seq_dir))
 965                 GOTO(out_err, rc = PTR_ERR(seq_dir));
 966         else if (seq_dir->d_inode == NULL)
 967                 GOTO(out_put, rc = -EFAULT);
 968
 969         osd_seq->oos_root = seq_dir;
 970
 971         LASSERT(osd_seq->oos_dirs == NULL);
 972         OBD_ALLOC_PTR_ARRAY(osd_seq->oos_dirs, osd_seq->oos_subdir_count);
 973         if (osd_seq->oos_dirs == NULL)
 974                 GOTO(out_put, rc = -ENOMEM);
 975
 976         for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 977                 struct dentry   *dir;
 978
 979                 snprintf(dir_name, sizeof(dir_name), "d%u", i);
 980                 dir = simple_mkdir(info->oti_env, osd, osd_seq->oos_root, NULL,
 981                                    dir_name, LMAC_NOT_IN_OI | LMAC_FID_ON_OST,
 982                                    0700, NULL);
 983                 if (IS_ERR(dir)) {
 984                         GOTO(out_free, rc = PTR_ERR(dir));
 985                 } else if (dir->d_inode == NULL) {
 986                         dput(dir);
 987                         GOTO(out_free, rc = -EFAULT);
 988                 }
 989
 990                 osd_seq->oos_dirs[i] = dir;
 991         }
 992
 993         if (rc != 0) {
 994 out_free:
 995                 for (i = 0; i < osd_seq->oos_subdir_count; i++) {
 996                         if (osd_seq->oos_dirs[i] != NULL)
 997                                 dput(osd_seq->oos_dirs[i]);
 998                 }
 999                 OBD_FREE_PTR_ARRAY(osd_seq->oos_dirs,
1000                                    osd_seq->oos_subdir_count);
1001 out_put:
1002                 dput(seq_dir);
1003                 osd_seq->oos_root = NULL;
1004         }
1005 out_err:
1006         RETURN(rc);
1007 }
1008
1009 static struct osd_obj_seq *osd_seq_load(struct osd_thread_info *info,
1010                                         struct osd_device *osd, u64 seq)
1011 {
1012         struct osd_obj_map *map;
1013         struct osd_obj_seq *osd_seq;
1014         int rc = 0;
1015
1016         ENTRY;
1017
1018         map = osd->od_ost_map;
1019         LASSERT(map);
1020         LASSERT(map->om_root);
1021
1022         osd_seq = osd_seq_find(map, seq);
1023         if (likely(osd_seq != NULL))
1024                 RETURN(osd_seq);
1025
1026         /* Serializing init process */
1027         mutex_lock(&map->om_dir_init_mutex);
1028
1029         /* Check whether the seq has been added */
1030         read_lock(&map->om_seq_list_lock);
1031         osd_seq = osd_seq_find_locked(map, seq);
1032         if (osd_seq != NULL) {
1033                 read_unlock(&map->om_seq_list_lock);
1034                 GOTO(cleanup, rc = 0);
1035         }
1036         read_unlock(&map->om_seq_list_lock);
1037
1038         OBD_ALLOC_PTR(osd_seq);
1039         if (osd_seq == NULL)
1040                 GOTO(cleanup, rc = -ENOMEM);
1041
1042         INIT_LIST_HEAD(&osd_seq->oos_seq_list);
1043         osd_seq->oos_seq = seq;
1044         /*
1045          * Init subdir count to be 32, but each seq can have
1046          * different subdir count
1047          */
1048         osd_seq->oos_subdir_count = map->om_subdir_count;
1049         rc = osd_seq_load_locked(info, osd, osd_seq);
1050         if (rc != 0)
1051                 GOTO(cleanup, rc);
1052
1053         write_lock(&map->om_seq_list_lock);
1054         list_add(&osd_seq->oos_seq_list, &map->om_seq_list);
1055         write_unlock(&map->om_seq_list_lock);
1056
1057 cleanup:
1058         mutex_unlock(&map->om_dir_init_mutex);
1059         if (rc != 0) {
1060                 if (osd_seq != NULL)
1061                         OBD_FREE_PTR(osd_seq);
1062                 RETURN(ERR_PTR(rc));
1063         }
1064
1065         RETURN(osd_seq);
1066 }
1067
1068 int osd_obj_map_lookup(struct osd_thread_info *info, struct osd_device *dev,
1069                        const struct lu_fid *fid, struct osd_inode_id *id)
1070 {
1071         struct osd_obj_map *map;
1072         struct osd_obj_seq *osd_seq;
1073         struct dentry *d_seq;
1074         struct dentry *child;
1075         struct ost_id *ostid = &info->oti_ostid;
1076         int dirn;
1077         char name[32];
1078         struct ldiskfs_dir_entry_2 *de;
1079         struct buffer_head *bh;
1080         struct inode *dir;
1081         struct inode *inode;
1082
1083         ENTRY;
1084
1085         /* on the very first lookup we find and open directories */
1086         map = dev->od_ost_map;
1087         LASSERT(map);
1088         LASSERT(map->om_root);
1089
1090         fid_to_ostid(fid, ostid);
1091         osd_seq = osd_seq_load(info, dev, ostid_seq(ostid));
1092         if (IS_ERR(osd_seq))
1093                 RETURN(PTR_ERR(osd_seq));
1094
1095         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1096         d_seq = osd_seq->oos_dirs[dirn];
1097         LASSERT(d_seq);
1098
1099         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1100
1101         child = &info->oti_child_dentry;
1102         child->d_parent = d_seq;
1103         child->d_name.hash = 0;
1104         child->d_name.name = name;
1105         /* XXX: we can use rc from sprintf() instead of strlen() */
1106         child->d_name.len = strlen(name);
1107
1108         dir = d_seq->d_inode;
1109         inode_lock(dir);
1110         bh = osd_ldiskfs_find_entry(dir, &child->d_name, &de, NULL, NULL);
1111         inode_unlock(dir);
1112
1113         if (IS_ERR(bh))
1114                 RETURN(PTR_ERR(bh));
1115
1116         osd_id_gen(id, le32_to_cpu(de->inode), OSD_OII_NOGEN);
1117         brelse(bh);
1118
1119         inode = osd_iget(info, dev, id);
1120         if (IS_ERR(inode)) {
1121                 int rc = PTR_ERR(inode);
1122
1123                 RETURN(rc == -ENOENT ? -ESTALE : rc);
1124         }
1125
1126         iput(inode);
1127         RETURN(0);
1128 }
1129
1130 int osd_obj_map_insert(struct osd_thread_info *info,
1131                        struct osd_device *osd,
1132                        const struct lu_fid *fid,
1133                        const struct osd_inode_id *id,
1134                        handle_t *th)
1135 {
1136         struct osd_obj_map *map;
1137         struct osd_obj_seq *osd_seq;
1138         struct dentry *d;
1139         struct ost_id *ostid = &info->oti_ostid;
1140         u64 oid;
1141         int dirn, rc = 0;
1142         char name[32];
1143
1144         ENTRY;
1145
1146         map = osd->od_ost_map;
1147         LASSERT(map);
1148
1149         /* map fid to seq:objid */
1150         fid_to_ostid(fid, ostid);
1151
1152         oid = ostid_id(ostid);
1153         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1154         if (IS_ERR(osd_seq))
1155                 RETURN(PTR_ERR(osd_seq));
1156
1157         dirn = oid & (osd_seq->oos_subdir_count - 1);
1158         d = osd_seq->oos_dirs[dirn];
1159         LASSERT(d);
1160
1161         osd_oid_name(name, sizeof(name), fid, oid);
1162
1163 again:
1164         rc = osd_obj_add_entry(info, osd, d, name, id, th);
1165         if (rc == -EEXIST) {
1166                 rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1167                 if (unlikely(rc == -ENOENT))
1168                         goto again;
1169
1170                 if (unlikely(rc == 1))
1171                         RETURN(0);
1172         }
1173
1174         RETURN(rc);
1175 }
1176
1177 int osd_obj_map_delete(struct osd_thread_info *info, struct osd_device *osd,
1178                        const struct lu_fid *fid, handle_t *th)
1179 {
1180         struct osd_obj_map *map;
1181         struct osd_obj_seq *osd_seq;
1182         struct dentry *d;
1183         struct ost_id *ostid = &info->oti_ostid;
1184         int dirn, rc = 0;
1185         char name[32];
1186
1187         ENTRY;
1188
1189         map = osd->od_ost_map;
1190         LASSERT(map);
1191
1192         /* map fid to seq:objid */
1193         fid_to_ostid(fid, ostid);
1194
1195         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1196         if (IS_ERR(osd_seq))
1197                 GOTO(cleanup, rc = PTR_ERR(osd_seq));
1198
1199         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1200         d = osd_seq->oos_dirs[dirn];
1201         LASSERT(d);
1202
1203         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1204         rc = osd_obj_del_entry(info, osd, d, name, th);
1205 cleanup:
1206         RETURN(rc);
1207 }
1208
1209 int osd_obj_map_update(struct osd_thread_info *info,
1210                        struct osd_device *osd,
1211                        const struct lu_fid *fid,
1212                        const struct osd_inode_id *id,
1213                        handle_t *th)
1214 {
1215         struct osd_obj_seq *osd_seq;
1216         struct dentry *d;
1217         struct ost_id *ostid = &info->oti_ostid;
1218         int dirn, rc = 0;
1219         char name[32];
1220
1221         ENTRY;
1222
1223         fid_to_ostid(fid, ostid);
1224         osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1225         if (IS_ERR(osd_seq))
1226                 RETURN(PTR_ERR(osd_seq));
1227
1228         dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1229         d = osd_seq->oos_dirs[dirn];
1230         LASSERT(d);
1231
1232         osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1233         rc = osd_obj_update_entry(info, osd, d, name, fid, id, th);
1234
1235         RETURN(rc);
1236 }
1237
1238 int osd_obj_map_recover(struct osd_thread_info *info,
1239                         struct osd_device *osd,
1240                         struct inode *src_parent,
1241                         struct dentry *src_child,
1242                         const struct lu_fid *fid)
1243 {
1244         struct osd_obj_seq *osd_seq;
1245         struct dentry *tgt_parent;
1246         struct dentry *tgt_child = &info->oti_child_dentry;
1247         struct inode *dir;
1248         struct inode *inode = src_child->d_inode;
1249         struct ost_id *ostid = &info->oti_ostid;
1250         handle_t *jh;
1251         struct ldiskfs_dir_entry_2 *de;
1252         struct buffer_head *bh;
1253         char name[32];
1254         int dirn;
1255         int rc = 0;
1256
1257         ENTRY;
1258
1259         if (fid_is_last_id(fid)) {
1260                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1261                 if (IS_ERR(osd_seq))
1262                         RETURN(PTR_ERR(osd_seq));
1263
1264                 tgt_parent = osd_seq->oos_root;
1265                 tgt_child->d_name.name = "LAST_ID";
1266                 tgt_child->d_name.len = strlen("LAST_ID");
1267         } else {
1268                 fid_to_ostid(fid, ostid);
1269                 osd_seq = osd_seq_load(info, osd, ostid_seq(ostid));
1270                 if (IS_ERR(osd_seq))
1271                         RETURN(PTR_ERR(osd_seq));
1272
1273                 dirn = ostid_id(ostid) & (osd_seq->oos_subdir_count - 1);
1274                 tgt_parent = osd_seq->oos_dirs[dirn];
1275                 osd_oid_name(name, sizeof(name), fid, ostid_id(ostid));
1276                 tgt_child->d_name.name = name;
1277                 tgt_child->d_name.len = strlen(name);
1278         }
1279         LASSERT(tgt_parent != NULL);
1280
1281         dir = tgt_parent->d_inode;
1282         tgt_child->d_name.hash = 0;
1283         tgt_child->d_parent = tgt_parent;
1284         tgt_child->d_inode = inode;
1285
1286         /* The non-initialized src_child may be destroyed. */
1287         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
1288                                 osd_dto_credits_noquota[DTO_INDEX_DELETE] +
1289                                 osd_dto_credits_noquota[DTO_INDEX_INSERT] +
1290                                 osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
1291         if (IS_ERR(jh))
1292                 RETURN(PTR_ERR(jh));
1293
1294         dquot_initialize(src_parent);
1295         dquot_initialize(dir);
1296
1297         inode_lock(dir);
1298         bh = osd_ldiskfs_find_entry(dir, &tgt_child->d_name, &de, NULL, NULL);
1299         if (!IS_ERR(bh)) {
1300                 /*
1301                  * XXX: If some other object occupied the same slot. And If such
1302                  *      inode is zero-sized and with SUID+SGID, then means it is
1303                  *      a new created one. Maybe we can remove it and insert the
1304                  *      original one back to the /O/<seq>/d<x>. But there are
1305                  *      something to be considered:
1306                  *
1307                  *      1) The OST-object under /lost+found has crashed LMA.
1308                  *         So it should not conflict with the current one.
1309                  *
1310                  *      2) There are race conditions that: someone may just want
1311                  *         to modify the current one. Even if the OI scrub takes
1312                  *         the object lock when remove the current one, it still
1313                  *         cause the modification to be lost becasue the target
1314                  *         has been removed when the RPC service thread waiting
1315                  *         for the lock.
1316                  *
1317                  *      So keep it there before we have suitable solution.
1318                  */
1319                 brelse(bh);
1320                 inode_unlock(dir);
1321                 ldiskfs_journal_stop(jh);
1322
1323                 rc = -EEXIST;
1324                 /* If the src object has never been modified, then remove it. */
1325                 if (inode->i_size == 0 && inode->i_mode & S_ISUID &&
1326                     inode->i_mode & S_ISGID) {
1327                         rc = ll_vfs_unlink(src_parent, src_child);
1328                         if (unlikely(rc == -ENOENT))
1329                                 rc = 0;
1330                 }
1331                 if (rc)
1332                         RETURN(rc);
1333         }
1334
1335         bh = osd_ldiskfs_find_entry(src_parent, &src_child->d_name, &de,
1336                                     NULL, NULL);
1337         if (unlikely(IS_ERR(bh)))
1338                 GOTO(unlock, rc = PTR_ERR(bh));
1339
1340         rc = ldiskfs_delete_entry(jh, src_parent, de, bh);
1341         brelse(bh);
1342         if (rc != 0)
1343                 GOTO(unlock, rc);
1344
1345         rc = osd_ldiskfs_add_entry(info, osd, jh, tgt_child, inode, NULL);
1346
1347         GOTO(unlock, rc);
1348
1349 unlock:
1350         inode_unlock(dir);
1351         ldiskfs_journal_stop(jh);
1352         return rc;
1353 }
1354
1355 static struct dentry *
1356 osd_object_spec_find(struct osd_thread_info *info, struct osd_device *osd,
1357                      const struct lu_fid *fid, char **name)
1358 {
1359         struct dentry *root = ERR_PTR(-ENOENT);
1360
1361         if (fid_is_last_id(fid)) {
1362                 struct osd_obj_seq *osd_seq;
1363
1364                 /* on creation of LAST_ID we create O/<seq> hierarchy */
1365                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1366                 if (IS_ERR(osd_seq))
1367                         RETURN((struct dentry *)osd_seq);
1368
1369                 *name = "LAST_ID";
1370                 root = osd_seq->oos_root;
1371         } else {
1372                 *name = osd_lf_fid2name(fid);
1373                 if (*name == NULL)
1374                         CWARN("UNKNOWN COMPAT FID "DFID"\n", PFID(fid));
1375                 else if ((*name)[0])
1376                         root = osd_sb(osd)->s_root;
1377         }
1378
1379         return root;
1380 }
1381
1382 int osd_obj_spec_update(struct osd_thread_info *info, struct osd_device *osd,
1383                         const struct lu_fid *fid, const struct osd_inode_id *id,
1384                         handle_t *th)
1385 {
1386         struct dentry *root;
1387         char *name = NULL;
1388         int rc;
1389
1390         ENTRY;
1391
1392         root = osd_object_spec_find(info, osd, fid, &name);
1393         if (!IS_ERR(root)) {
1394                 rc = osd_obj_update_entry(info, osd, root, name, fid, id, th);
1395         } else {
1396                 rc = PTR_ERR(root);
1397                 if (rc == -ENOENT)
1398                         rc = 1;
1399         }
1400
1401         RETURN(rc);
1402 }
1403
1404 int osd_obj_spec_insert(struct osd_thread_info *info, struct osd_device *osd,
1405                         const struct lu_fid *fid, const struct osd_inode_id *id,
1406                         handle_t *th)
1407 {
1408         struct dentry *root;
1409         char *name = NULL;
1410         int rc;
1411
1412         ENTRY;
1413
1414         root = osd_object_spec_find(info, osd, fid, &name);
1415         if (!IS_ERR(root)) {
1416                 rc = osd_obj_add_entry(info, osd, root, name, id, th);
1417         } else {
1418                 rc = PTR_ERR(root);
1419                 if (rc == -ENOENT)
1420                         rc = 0;
1421         }
1422
1423         RETURN(rc);
1424 }
1425
1426 int osd_obj_spec_lookup(struct osd_thread_info *info, struct osd_device *osd,
1427                         const struct lu_fid *fid, struct osd_inode_id *id,
1428                         enum oi_check_flags flags)
1429 {
1430         struct dentry *root;
1431         struct dentry *dentry;
1432         struct inode *inode;
1433         char *name = NULL;
1434         int rc = -ENOENT;
1435
1436         ENTRY;
1437
1438         if (fid_is_last_id(fid)) {
1439                 struct osd_obj_seq *osd_seq;
1440
1441                 osd_seq = osd_seq_load(info, osd, fid_seq(fid));
1442                 if (IS_ERR(osd_seq))
1443                         RETURN(PTR_ERR(osd_seq));
1444                 root = osd_seq->oos_root;
1445                 name = "LAST_ID";
1446         } else {
1447                 root = osd_sb(osd)->s_root;
1448                 name = osd_lf_fid2name(fid);
1449                 if (name == NULL || strlen(name) == 0)
1450                         RETURN(-ENOENT);
1451         }
1452
1453         dentry = osd_lookup_one_len_common(osd, name, root, strlen(name),
1454                                            flags);
1455         if (!IS_ERR(dentry)) {
1456                 inode = dentry->d_inode;
1457                 if (inode) {
1458                         if (is_bad_inode(inode)) {
1459                                 rc = -EIO;
1460                         } else {
1461                                 osd_id_gen(id, inode->i_ino,
1462                                            inode->i_generation);
1463                                 rc = 0;
1464                         }
1465                 }
1466                 /*
1467                  * if dentry is accessible after osd_compat_spec_insert it
1468                  * will still contain NULL inode, so don't keep it in cache
1469                  */
1470                 d_invalidate(dentry);
1471                 dput(dentry);
1472         }
1473
1474         RETURN(rc);
1475 }
1476
1477 #ifndef HAVE_BIO_INTEGRITY_ENABLED
1478 bool bio_integrity_enabled(struct bio *bio)
1479 {
1480         struct blk_integrity *bi = blk_get_integrity(bio_get_disk(bio));
1481
1482         if (bio_op(bio) != REQ_OP_READ && bio_op(bio) != REQ_OP_WRITE)
1483                 return false;
1484
1485         if (!bio_sectors(bio))
1486                 return false;
1487
1488          /* Already protected? */
1489         if (bio_integrity(bio))
1490                 return false;
1491
1492         if (bi == NULL)
1493                 return false;
1494
1495         if (bio_data_dir(bio) == READ && bi->profile->verify_fn != NULL &&
1496             (bi->flags & BLK_INTEGRITY_VERIFY))
1497                 return true;
1498
1499         if (bio_data_dir(bio) == WRITE && bi->profile->generate_fn != NULL &&
1500             (bi->flags & BLK_INTEGRITY_GENERATE))
1501                 return true;
1502
1503         return false;
1504 }
1505 #endif