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