lustre/osd-ldiskfs/osd_handler.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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/osd/osd_handler.c
  32  *
  33  * Top-level entry points into osd module
  34  *
  35  * Author: Nikita Danilov <nikita@clusterfs.com>
  36  *         Pravin Shelar <pravin.shelar@sun.com> : Added fid in dirent
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_OSD
  40
  41 #include <linux/fs_struct.h>
  42 #include <linux/module.h>
  43 #include <linux/user_namespace.h>
  44 #include <linux/uidgid.h>
  45
  46 /* prerequisite for linux/xattr.h */
  47 #include <linux/types.h>
  48 /* prerequisite for linux/xattr.h */
  49 #include <linux/fs.h>
  50 /* XATTR_{REPLACE,CREATE} */
  51 #include <linux/xattr.h>
  52
  53 #include <ldiskfs/ldiskfs.h>
  54 #include <ldiskfs/xattr.h>
  55 #include <ldiskfs/ldiskfs_extents.h>
  56 #undef ENTRY
  57 /*
  58  * struct OBD_{ALLOC,FREE}*()
  59  * OBD_FAIL_CHECK
  60  */
  61 #include <obd_support.h>
  62 /* struct ptlrpc_thread */
  63 #include <lustre_net.h>
  64 #include <lustre_fid.h>
  65 /* process_config */
  66 #include <uapi/linux/lustre/lustre_param.h>
  67
  68 #include "osd_internal.h"
  69 #include "osd_dynlocks.h"
  70
  71 /* llo_* api support */
  72 #include <md_object.h>
  73 #include <lustre_quota.h>
  74
  75 #include <lustre_linkea.h>
  76
  77 /* encoding routines */
  78 #include <lustre_crypto.h>
  79
  80 /* Maximum EA size is limited by LNET_MTU for remote objects */
  81 #define OSD_MAX_EA_SIZE 1048364
  82
  83 int ldiskfs_pdo = 1;
  84 module_param(ldiskfs_pdo, int, 0644);
  85 MODULE_PARM_DESC(ldiskfs_pdo, "ldiskfs with parallel directory operations");
  86
  87 int ldiskfs_track_declares_assert;
  88 module_param(ldiskfs_track_declares_assert, int, 0644);
  89 MODULE_PARM_DESC(ldiskfs_track_declares_assert, "LBUG during tracking of declares");
  90
  91 /* Slab to allocate dynlocks */
  92 struct kmem_cache *dynlock_cachep;
  93
  94 /* Slab to allocate osd_it_ea */
  95 struct kmem_cache *osd_itea_cachep;
  96
  97 static struct lu_kmem_descr ldiskfs_caches[] = {
  98         {
  99                 .ckd_cache = &dynlock_cachep,
 100                 .ckd_name  = "dynlock_cache",
 101                 .ckd_size  = sizeof(struct dynlock_handle)
 102         },
 103         {
 104                 .ckd_cache = &osd_itea_cachep,
 105                 .ckd_name  = "osd_itea_cache",
 106                 .ckd_size  = sizeof(struct osd_it_ea)
 107         },
 108         {
 109                 .ckd_cache = NULL
 110         }
 111 };
 112
 113 static const char dot[] = ".";
 114 static const char dotdot[] = "..";
 115
 116 static const struct lu_object_operations      osd_lu_obj_ops;
 117 static const struct dt_object_operations      osd_obj_ops;
 118 static const struct dt_object_operations      osd_obj_otable_it_ops;
 119 static const struct dt_index_operations       osd_index_iam_ops;
 120 static const struct dt_index_operations       osd_index_ea_ops;
 121
 122 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
 123                           const struct lu_fid *fid);
 124 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
 125                                                 struct osd_device *osd);
 126
 127 int osd_trans_declare_op2rb[] = {
 128         [OSD_OT_ATTR_SET]       = OSD_OT_ATTR_SET,
 129         [OSD_OT_PUNCH]          = OSD_OT_MAX,
 130         [OSD_OT_XATTR_SET]      = OSD_OT_XATTR_SET,
 131         [OSD_OT_CREATE]         = OSD_OT_DESTROY,
 132         [OSD_OT_DESTROY]        = OSD_OT_CREATE,
 133         [OSD_OT_REF_ADD]        = OSD_OT_REF_DEL,
 134         [OSD_OT_REF_DEL]        = OSD_OT_REF_ADD,
 135         [OSD_OT_WRITE]          = OSD_OT_WRITE,
 136         [OSD_OT_INSERT]         = OSD_OT_DELETE,
 137         [OSD_OT_DELETE]         = OSD_OT_INSERT,
 138         [OSD_OT_QUOTA]          = OSD_OT_MAX,
 139 };
 140
 141 static int osd_has_index(const struct osd_object *obj)
 142 {
 143         return obj->oo_dt.do_index_ops != NULL;
 144 }
 145
 146 static int osd_object_invariant(const struct lu_object *l)
 147 {
 148         return osd_invariant(osd_obj(l));
 149 }
 150
 151 /*
 152  * Concurrency: doesn't matter
 153  */
 154 static int osd_is_write_locked(const struct lu_env *env, struct osd_object *o)
 155 {
 156         struct osd_thread_info *oti = osd_oti_get(env);
 157
 158         return oti->oti_w_locks > 0 && o->oo_owner == env;
 159 }
 160
 161 /*
 162  * Concurrency: doesn't access mutable data
 163  */
 164 static int osd_root_get(const struct lu_env *env,
 165                         struct dt_device *dev, struct lu_fid *f)
 166 {
 167         lu_local_obj_fid(f, OSD_FS_ROOT_OID);
 168         return 0;
 169 }
 170
 171 /*
 172  * the following set of functions are used to maintain per-thread
 173  * cache of FID->ino mapping. this mechanism is needed to resolve
 174  * FID to inode at dt_insert() which in turn stores ino in the
 175  * directory entries to keep ldiskfs compatible with ext[34].
 176  * due to locking-originated restrictions we can't lookup ino
 177  * using LU cache (deadlock is possible). lookup using OI is quite
 178  * expensive. so instead we maintain this cache and methods like
 179  * dt_create() fill it. so in the majority of cases dt_insert() is
 180  * able to find needed mapping in lockless manner.
 181  */
 182 static struct osd_idmap_cache *
 183 osd_idc_find(const struct lu_env *env, struct osd_device *osd,
 184              const struct lu_fid *fid)
 185 {
 186         struct osd_thread_info *oti = osd_oti_get(env);
 187         struct osd_idmap_cache *idc = oti->oti_ins_cache;
 188         int i;
 189
 190         for (i = 0; i < oti->oti_ins_cache_used; i++) {
 191                 if (!lu_fid_eq(&idc[i].oic_fid, fid))
 192                         continue;
 193                 if (idc[i].oic_dev != osd)
 194                         continue;
 195
 196                 return idc + i;
 197         }
 198
 199         return NULL;
 200 }
 201
 202 static struct osd_idmap_cache *
 203 osd_idc_add(const struct lu_env *env, struct osd_device *osd,
 204             const struct lu_fid *fid)
 205 {
 206         struct osd_thread_info *oti   = osd_oti_get(env);
 207         struct osd_idmap_cache *idc;
 208         int i;
 209
 210         if (unlikely(oti->oti_ins_cache_used >= oti->oti_ins_cache_size)) {
 211                 i = oti->oti_ins_cache_size * 2;
 212                 if (i == 0)
 213                         i = OSD_INS_CACHE_SIZE;
 214                 OBD_ALLOC_PTR_ARRAY_LARGE(idc, i);
 215                 if (idc == NULL)
 216                         return ERR_PTR(-ENOMEM);
 217                 if (oti->oti_ins_cache != NULL) {
 218                         memcpy(idc, oti->oti_ins_cache,
 219                                oti->oti_ins_cache_used * sizeof(*idc));
 220                         OBD_FREE_PTR_ARRAY_LARGE(oti->oti_ins_cache,
 221                                            oti->oti_ins_cache_used);
 222                 }
 223                 oti->oti_ins_cache = idc;
 224                 oti->oti_ins_cache_size = i;
 225         }
 226
 227         idc = oti->oti_ins_cache + oti->oti_ins_cache_used++;
 228         idc->oic_fid = *fid;
 229         idc->oic_dev = osd;
 230         idc->oic_lid.oii_ino = 0;
 231         idc->oic_lid.oii_gen = 0;
 232         idc->oic_remote = 0;
 233
 234         return idc;
 235 }
 236
 237 /*
 238  * lookup mapping for the given fid in the cache, initialize a
 239  * new one if not found. the initialization checks whether the
 240  * object is local or remote. for local objects, OI is used to
 241  * learn ino/generation. the function is used when the caller
 242  * has no information about the object, e.g. at dt_insert().
 243  */
 244 static struct osd_idmap_cache *
 245 osd_idc_find_or_init(const struct lu_env *env, struct osd_device *osd,
 246                      const struct lu_fid *fid)
 247 {
 248         struct osd_idmap_cache *idc;
 249         int rc;
 250
 251         idc = osd_idc_find(env, osd, fid);
 252         LASSERT(!IS_ERR(idc));
 253         if (idc != NULL)
 254                 return idc;
 255
 256         CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
 257                osd->od_svname, PFID(fid));
 258
 259         /* new mapping is needed */
 260         idc = osd_idc_add(env, osd, fid);
 261         if (IS_ERR(idc)) {
 262                 CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
 263                        osd->od_svname, PFID(fid), PTR_ERR(idc));
 264                 return idc;
 265         }
 266
 267         /* initialize it */
 268         rc = osd_remote_fid(env, osd, fid);
 269         if (unlikely(rc < 0))
 270                 return ERR_PTR(rc);
 271
 272         if (rc == 0) {
 273                 /* the object is local, lookup in OI */
 274                 /* XXX: probably cheaper to lookup in LU first? */
 275                 rc = osd_oi_lookup(osd_oti_get(env), osd, fid,
 276                                    &idc->oic_lid, 0);
 277                 if (unlikely(rc < 0)) {
 278                         CERROR("can't lookup: rc = %d\n", rc);
 279                         return ERR_PTR(rc);
 280                 }
 281         } else {
 282                 /* the object is remote */
 283                 idc->oic_remote = 1;
 284         }
 285
 286         return idc;
 287 }
 288
 289 static void osd_idc_dump_lma(const struct lu_env *env,
 290                                 struct osd_device *osd,
 291                                 unsigned long ino,
 292                                 bool check_in_oi)
 293 {
 294         struct osd_thread_info *info = osd_oti_get(env);
 295         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 296         const struct lu_fid *fid;
 297         struct osd_inode_id lid;
 298         struct inode *inode;
 299         int rc;
 300
 301         inode = osd_ldiskfs_iget(osd_sb(osd), ino);
 302         if (IS_ERR(inode)) {
 303                 CERROR("%s: can't get inode %lu: rc = %d\n",
 304                        osd->od_svname, ino, (int)PTR_ERR(inode));
 305                 return;
 306         }
 307         if (is_bad_inode(inode)) {
 308                 CERROR("%s: bad inode %lu\n", osd->od_svname, ino);
 309                 goto put;
 310         }
 311         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 312         if (rc) {
 313                 CERROR("%s: can't get LMA for %lu: rc = %d\n",
 314                        osd->od_svname, ino, rc);
 315                 goto put;
 316         }
 317         fid = &loa->loa_lma.lma_self_fid;
 318         LCONSOLE(D_INFO, "%s: "DFID" in inode %lu/%u\n", osd->od_svname,
 319                       PFID(fid), ino, (unsigned)inode->i_generation);
 320         if (!check_in_oi)
 321                 goto put;
 322         rc = osd_oi_lookup(osd_oti_get(env), osd, fid, &lid, 0);
 323         if (rc) {
 324                 CERROR("%s: can't lookup "DFID": rc = %d\n",
 325                        osd->od_svname, PFID(fid), rc);
 326                 goto put;
 327         }
 328         LCONSOLE(D_INFO, "%s: "DFID" maps to %u/%u\n", osd->od_svname,
 329                       PFID(fid), lid.oii_ino, lid.oii_gen);
 330 put:
 331         iput(inode);
 332 }
 333
 334 static void osd_idc_dump_debug(const struct lu_env *env,
 335                                 struct osd_device *osd,
 336                                 const struct lu_fid *fid,
 337                                 unsigned long ino1,
 338                                 unsigned long ino2)
 339 {
 340         struct osd_inode_id lid;
 341
 342         int rc;
 343
 344         rc = osd_oi_lookup(osd_oti_get(env), osd, fid, &lid, 0);
 345         if (!rc) {
 346                 LCONSOLE(D_INFO, "%s: "DFID" maps to %u/%u\n",
 347                         osd->od_svname, PFID(fid), lid.oii_ino, lid.oii_gen);
 348                 osd_idc_dump_lma(env, osd, lid.oii_ino, false);
 349         } else {
 350                 CERROR("%s: can't lookup "DFID": rc = %d\n",
 351                        osd->od_svname, PFID(fid), rc);
 352         }
 353         if (ino1)
 354                 osd_idc_dump_lma(env, osd, ino1, true);
 355         if (ino2)
 356                 osd_idc_dump_lma(env, osd, ino2, true);
 357 }
 358
 359 /*
 360  * lookup mapping for given FID and fill it from the given object.
 361  * the object is lolcal by definition.
 362  */
 363 static int osd_idc_find_and_init(const struct lu_env *env,
 364                                  struct osd_device *osd,
 365                                  struct osd_object *obj)
 366 {
 367         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
 368         struct osd_idmap_cache *idc;
 369
 370         idc = osd_idc_find(env, osd, fid);
 371         LASSERT(!IS_ERR(idc));
 372         if (idc != NULL) {
 373                 if (obj->oo_inode == NULL)
 374                         return 0;
 375                 if (idc->oic_lid.oii_ino != obj->oo_inode->i_ino) {
 376                         if (idc->oic_lid.oii_ino) {
 377                                 osd_idc_dump_debug(env, osd, fid,
 378                                                    idc->oic_lid.oii_ino,
 379                                                    obj->oo_inode->i_ino);
 380                                 return -EINVAL;
 381                         }
 382                         idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 383                         idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 384                 }
 385                 return 0;
 386         }
 387
 388         CDEBUG(D_INODE, "%s: FID "DFID" not in the id map cache\n",
 389                osd->od_svname, PFID(fid));
 390
 391         /* new mapping is needed */
 392         idc = osd_idc_add(env, osd, fid);
 393         if (IS_ERR(idc)) {
 394                 CERROR("%s: FID "DFID" add id map cache failed: %ld\n",
 395                        osd->od_svname, PFID(fid), PTR_ERR(idc));
 396                 return PTR_ERR(idc);
 397         }
 398
 399         if (obj->oo_inode != NULL) {
 400                 idc->oic_lid.oii_ino = obj->oo_inode->i_ino;
 401                 idc->oic_lid.oii_gen = obj->oo_inode->i_generation;
 402         }
 403         return 0;
 404 }
 405
 406 /*
 407  * OSD object methods.
 408  */
 409
 410 /*
 411  * Concurrency: no concurrent access is possible that early in object
 412  * life-cycle.
 413  */
 414 static struct lu_object *osd_object_alloc(const struct lu_env *env,
 415                                           const struct lu_object_header *hdr,
 416                                           struct lu_device *d)
 417 {
 418         struct osd_object *mo;
 419
 420         OBD_ALLOC_PTR(mo);
 421         if (mo != NULL) {
 422                 struct lu_object *l;
 423                 struct lu_object_header *h;
 424                 struct osd_device *o = osd_dev(d);
 425
 426                 l = &mo->oo_dt.do_lu;
 427                 if (unlikely(o->od_in_init)) {
 428                         OBD_ALLOC_PTR(h);
 429                         if (!h) {
 430                                 OBD_FREE_PTR(mo);
 431                                 return NULL;
 432                         }
 433
 434                         lu_object_header_init(h);
 435                         lu_object_init(l, h, d);
 436                         lu_object_add_top(h, l);
 437                         mo->oo_header = h;
 438                 } else {
 439                         dt_object_init(&mo->oo_dt, NULL, d);
 440                         mo->oo_header = NULL;
 441                 }
 442
 443                 mo->oo_dt.do_ops = &osd_obj_ops;
 444                 l->lo_ops = &osd_lu_obj_ops;
 445                 init_rwsem(&mo->oo_sem);
 446                 init_rwsem(&mo->oo_ext_idx_sem);
 447                 spin_lock_init(&mo->oo_guard);
 448                 INIT_LIST_HEAD(&mo->oo_xattr_list);
 449                 return l;
 450         }
 451         return NULL;
 452 }
 453
 454 int osd_get_lma(struct osd_thread_info *info, struct inode *inode,
 455                 struct dentry *dentry, struct lustre_ost_attrs *loa)
 456 {
 457         int rc;
 458
 459         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 460                              (void *)loa, sizeof(*loa));
 461         if (rc > 0) {
 462                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
 463
 464                 if (rc < sizeof(*lma))
 465                         return -EINVAL;
 466
 467                 rc = 0;
 468                 lustre_loa_swab(loa, true);
 469                 /* Check LMA compatibility */
 470                 if (lma->lma_incompat & ~LMA_INCOMPAT_SUPP) {
 471                         rc = -EOPNOTSUPP;
 472                         CWARN("%s: unsupported incompat LMA feature(s) %#x for fid = "DFID", ino = %lu: rc = %d\n",
 473                               osd_ino2name(inode),
 474                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 475                               PFID(&lma->lma_self_fid), inode->i_ino, rc);
 476                 }
 477         } else if (rc == 0) {
 478                 rc = -ENODATA;
 479         }
 480
 481         return rc;
 482 }
 483
 484 /*
 485  * retrieve object from backend ext fs.
 486  **/
 487 struct inode *osd_iget(struct osd_thread_info *info, struct osd_device *dev,
 488                        struct osd_inode_id *id)
 489 {
 490         int rc;
 491         struct inode *inode = NULL;
 492
 493         /*
 494          * if we look for an inode withing a running
 495          * transaction, then we risk to deadlock
 496          * osd_dirent_check_repair() breaks this
 497          */
 498          /* LASSERT(current->journal_info == NULL); */
 499
 500         inode = osd_ldiskfs_iget(osd_sb(dev), id->oii_ino);
 501         if (IS_ERR(inode)) {
 502                 CDEBUG(D_INODE, "no inode: ino = %u, rc = %ld\n",
 503                        id->oii_ino, PTR_ERR(inode));
 504         } else if (id->oii_gen != OSD_OII_NOGEN &&
 505                    inode->i_generation != id->oii_gen) {
 506                 CDEBUG(D_INODE, "unmatched inode: ino = %u, oii_gen = %u, "
 507                        "i_generation = %u\n",
 508                        id->oii_ino, id->oii_gen, inode->i_generation);
 509                 iput(inode);
 510                 inode = ERR_PTR(-ESTALE);
 511         } else if (inode->i_nlink == 0) {
 512                 /*
 513                  * due to parallel readdir and unlink,
 514                  * we can have dead inode here.
 515                  */
 516                 CDEBUG(D_INODE, "stale inode: ino = %u\n", id->oii_ino);
 517                 iput(inode);
 518                 inode = ERR_PTR(-ESTALE);
 519         } else if (is_bad_inode(inode)) {
 520                 rc = -ENOENT;
 521                 CWARN("%s: bad inode: ino = %u: rc = %d\n",
 522                       osd_dev2name(dev), id->oii_ino, rc);
 523                 iput(inode);
 524                 inode = ERR_PTR(rc);
 525         } else if ((rc = osd_attach_jinode(inode))) {
 526                 iput(inode);
 527                 inode = ERR_PTR(rc);
 528         } else {
 529                 ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 530                 if (id->oii_gen == OSD_OII_NOGEN)
 531                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 532
 533                 /*
 534                  * Do not update file c/mtime in ldiskfs.
 535                  * NB: we don't have any lock to protect this because we don't
 536                  * have reference on osd_object now, but contention with
 537                  * another lookup + attr_set can't happen in the tiny window
 538                  * between if (...) and set S_NOCMTIME.
 539                  */
 540                 if (!(inode->i_flags & S_NOCMTIME))
 541                         inode->i_flags |= S_NOCMTIME;
 542         }
 543         return inode;
 544 }
 545
 546 int osd_ldiskfs_add_entry(struct osd_thread_info *info, struct osd_device *osd,
 547                           handle_t *handle, struct dentry *child,
 548                           struct inode *inode, struct htree_lock *hlock)
 549 {
 550         int rc, rc2;
 551
 552         rc = __ldiskfs_add_entry(handle, child, inode, hlock);
 553         if (rc == -ENOBUFS || rc == -ENOSPC) {
 554                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 555                 struct inode *parent = child->d_parent->d_inode;
 556                 struct lu_fid *fid = NULL;
 557                 char fidstr[FID_LEN + 1] = "unknown";
 558
 559                 rc2 = osd_get_lma(info, parent, child->d_parent, loa);
 560                 if (!rc2) {
 561                         fid = &loa->loa_lma.lma_self_fid;
 562                 } else if (rc2 == -ENODATA) {
 563                         if (unlikely(is_root_inode(parent))) {
 564                                 fid = &info->oti_fid3;
 565                                 lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 566                         } else if (!osd->od_is_ost && osd->od_index == 0) {
 567                                 fid = &info->oti_fid3;
 568                                 lu_igif_build(fid, parent->i_ino,
 569                                               parent->i_generation);
 570                         }
 571                 }
 572
 573                 if (fid != NULL)
 574                         snprintf(fidstr, sizeof(fidstr), DFID, PFID(fid));
 575
 576                 /* below message is checked in sanity.sh test_129 */
 577                 if (rc == -ENOSPC) {
 578                         CWARN("%s: directory (inode: %lu, FID: %s) has reached max size limit\n",
 579                               osd_name(osd), parent->i_ino, fidstr);
 580                 } else {
 581                         rc = 0; /* ignore such error now */
 582                         CWARN("%s: directory (inode: %lu, FID: %s) is approaching max size limit\n",
 583                               osd_name(osd), parent->i_ino, fidstr);
 584                 }
 585
 586         }
 587
 588         return rc;
 589 }
 590
 591
 592 struct inode *
 593 osd_iget_fid(struct osd_thread_info *info, struct osd_device *dev,
 594              struct osd_inode_id *id, struct lu_fid *fid)
 595 {
 596         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 597         struct inode *inode;
 598         int rc;
 599
 600         inode = osd_iget(info, dev, id);
 601         if (IS_ERR(inode))
 602                 return inode;
 603
 604         rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
 605         if (!rc) {
 606                 *fid = loa->loa_lma.lma_self_fid;
 607         } else if (rc == -ENODATA) {
 608                 if (unlikely(is_root_inode(inode)))
 609                         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
 610                 else
 611                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
 612         } else {
 613                 iput(inode);
 614                 inode = ERR_PTR(rc);
 615         }
 616         return inode;
 617 }
 618
 619 static struct inode *osd_iget_check(struct osd_thread_info *info,
 620                                     struct osd_device *dev,
 621                                     const struct lu_fid *fid,
 622                                     struct osd_inode_id *id,
 623                                     bool trusted)
 624 {
 625         struct inode *inode;
 626         int rc = 0;
 627
 628         ENTRY;
 629
 630         /*
 631          * The cached OI mapping is trustable. If we cannot locate the inode
 632          * via the cached OI mapping, then return the failure to the caller
 633          * directly without further OI checking.
 634          */
 635
 636 again:
 637         inode = osd_ldiskfs_iget(osd_sb(dev), id->oii_ino);
 638         if (IS_ERR(inode)) {
 639                 rc = PTR_ERR(inode);
 640                 if (!trusted && (rc == -ENOENT || rc == -ESTALE))
 641                         goto check_oi;
 642
 643                 CDEBUG(D_INODE, "no inode for FID: "DFID", ino = %u, rc = %d\n",
 644                        PFID(fid), id->oii_ino, rc);
 645                 GOTO(put, rc);
 646         }
 647
 648         if (is_bad_inode(inode)) {
 649                 rc = -ENOENT;
 650                 if (!trusted)
 651                         goto check_oi;
 652
 653                 CDEBUG(D_INODE, "bad inode for FID: "DFID", ino = %u\n",
 654                        PFID(fid), id->oii_ino);
 655                 GOTO(put, rc);
 656         }
 657
 658         if (id->oii_gen != OSD_OII_NOGEN &&
 659             inode->i_generation != id->oii_gen) {
 660                 rc = -ESTALE;
 661                 if (!trusted)
 662                         goto check_oi;
 663
 664                 CDEBUG(D_INODE, "unmatched inode for FID: "DFID", ino = %u, "
 665                        "oii_gen = %u, i_generation = %u\n", PFID(fid),
 666                        id->oii_ino, id->oii_gen, inode->i_generation);
 667                 GOTO(put, rc);
 668         }
 669
 670         if (inode->i_nlink == 0) {
 671                 rc = -ENOENT;
 672                 if (!trusted)
 673                         goto check_oi;
 674
 675                 CDEBUG(D_INODE, "stale inode for FID: "DFID", ino = %u\n",
 676                        PFID(fid), id->oii_ino);
 677                 GOTO(put, rc);
 678         }
 679
 680         ldiskfs_clear_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
 681
 682 check_oi:
 683         if (rc != 0) {
 684                 __u32 saved_ino = id->oii_ino;
 685                 __u32 saved_gen = id->oii_gen;
 686
 687                 LASSERT(!trusted);
 688                 LASSERTF(rc == -ESTALE || rc == -ENOENT, "rc = %d\n", rc);
 689
 690                 rc = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
 691                 /*
 692                  * XXX: There are four possible cases:
 693                  *      1. rc = 0.
 694                  *         Backup/restore caused the OI invalid.
 695                  *      2. rc = 0.
 696                  *         Someone unlinked the object but NOT removed
 697                  *         the OI mapping, such as mount target device
 698                  *         as ldiskfs, and modify something directly.
 699                  *      3. rc = -ENOENT.
 700                  *         Someone just removed the object between the
 701                  *         former oi_lookup and the iget. It is normal.
 702                  *      4. Other failure cases.
 703                  *
 704                  *      Generally, when the device is mounted, it will
 705                  *      auto check whether the system is restored from
 706                  *      file-level backup or not. We trust such detect
 707                  *      to distinguish the 1st case from the 2nd case:
 708                  *      if the OI files are consistent but may contain
 709                  *      stale OI mappings because of case 2, if iget()
 710                  *      returns -ENOENT or -ESTALE, then it should be
 711                  *      the case 2.
 712                  */
 713                 if (rc != 0)
 714                         /*
 715                          * If the OI mapping was in OI file before the
 716                          * osd_iget_check(), but now, it is disappear,
 717                          * then it must be removed by race. That is a
 718                          * normal race case.
 719                          */
 720                         GOTO(put, rc);
 721
 722                 /*
 723                  * It is the OI scrub updated the OI mapping by race.
 724                  * The new OI mapping must be valid.
 725                  */
 726                 if (saved_ino != id->oii_ino ||
 727                     (saved_gen != id->oii_gen && saved_gen != OSD_OII_NOGEN)) {
 728                         if (!IS_ERR(inode))
 729                                 iput(inode);
 730
 731                         trusted = true;
 732                         goto again;
 733                 }
 734
 735                 if (IS_ERR(inode)) {
 736                         if (dev->od_scrub.os_scrub.os_file.sf_flags &
 737                             SF_INCONSISTENT)
 738                                 /*
 739                                  * It still can be the case 2, but we cannot
 740                                  * distinguish it from the case 1. So return
 741                                  * -EREMCHG to block current operation until
 742                                  *  OI scrub rebuilt the OI mappings.
 743                                  */
 744                                 rc = -EREMCHG;
 745                         else
 746                                 rc = -ENOENT;
 747
 748                         GOTO(put, rc);
 749                 }
 750
 751                 if (inode->i_generation == id->oii_gen)
 752                         rc = -ENOENT;
 753                 else
 754                         rc = -EREMCHG;
 755         } else {
 756                 if (id->oii_gen == OSD_OII_NOGEN)
 757                         osd_id_gen(id, inode->i_ino, inode->i_generation);
 758
 759                 /*
 760                  * Do not update file c/mtime in ldiskfs.
 761                  * NB: we don't have any lock to protect this because we don't
 762                  * have reference on osd_object now, but contention with
 763                  * another lookup + attr_set can't happen in the tiny window
 764                  * between if (...) and set S_NOCMTIME.
 765                  */
 766                 if (!(inode->i_flags & S_NOCMTIME))
 767                         inode->i_flags |= S_NOCMTIME;
 768         }
 769
 770         GOTO(put, rc);
 771
 772 put:
 773         if (rc != 0) {
 774                 if (!IS_ERR(inode))
 775                         iput(inode);
 776
 777                 inode = ERR_PTR(rc);
 778         }
 779
 780         return inode;
 781 }
 782
 783 /**
 784  * \retval +v: new filter_fid does not contain self-fid
 785  * \retval 0:  filter_fid_18_23, contains self-fid
 786  * \retval -v: other failure cases
 787  */
 788 int osd_get_idif(struct osd_thread_info *info, struct inode *inode,
 789                  struct dentry *dentry, struct lu_fid *fid)
 790 {
 791         struct filter_fid *ff = &info->oti_ff;
 792         struct ost_id *ostid = &info->oti_ostid;
 793         int rc;
 794
 795         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_FID, ff, sizeof(*ff));
 796         if (rc == sizeof(struct filter_fid_18_23)) {
 797                 struct filter_fid_18_23 *ff_old = (void *)ff;
 798
 799                 ostid_set_seq(ostid, le64_to_cpu(ff_old->ff_seq));
 800                 rc = ostid_set_id(ostid, le64_to_cpu(ff_old->ff_objid));
 801                 /*
 802                  * XXX: use 0 as the index for compatibility, the caller will
 803                  * handle index related issues when necessary.
 804                  */
 805                 if (!rc)
 806                         ostid_to_fid(fid, ostid, 0);
 807         } else if (rc >= (int)sizeof(struct filter_fid_24_29)) {
 808                 rc = 1;
 809         } else if (rc >= 0) {
 810                 rc = -EINVAL;
 811         }
 812
 813         return rc;
 814 }
 815
 816 static int osd_lma_self_repair(struct osd_thread_info *info,
 817                                struct osd_device *osd, struct inode *inode,
 818                                const struct lu_fid *fid, __u32 compat)
 819 {
 820         handle_t *jh;
 821         int rc;
 822
 823         LASSERT(current->journal_info == NULL);
 824
 825         jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC,
 826                                   osd_dto_credits_noquota[DTO_XATTR_SET]);
 827         if (IS_ERR(jh)) {
 828                 rc = PTR_ERR(jh);
 829                 CWARN("%s: cannot start journal for lma_self_repair: rc = %d\n",
 830                       osd_name(osd), rc);
 831                 return rc;
 832         }
 833
 834         rc = osd_ea_fid_set(info, inode, fid, compat, 0);
 835         if (rc != 0)
 836                 CWARN("%s: cannot self repair the LMA: rc = %d\n",
 837                       osd_name(osd), rc);
 838         ldiskfs_journal_stop(jh);
 839         return rc;
 840 }
 841
 842 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 843 {
 844         struct osd_thread_info *info = osd_oti_get(env);
 845         struct osd_device *osd = osd_obj2dev(obj);
 846         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
 847         struct lustre_mdt_attrs *lma = &loa->loa_lma;
 848         struct inode *inode = obj->oo_inode;
 849         struct dentry *dentry = &info->oti_obj_dentry;
 850         struct lu_fid *fid = NULL;
 851         const struct lu_fid *rfid = lu_object_fid(&obj->oo_dt.do_lu);
 852         int rc;
 853
 854         ENTRY;
 855
 856         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LMA,
 857                              (void *)loa, sizeof(*loa));
 858         if (rc == -ENODATA && !fid_is_igif(rfid) && osd->od_check_ff) {
 859                 fid = &lma->lma_self_fid;
 860                 rc = osd_get_idif(info, inode, dentry, fid);
 861                 if (rc > 0 || (rc == -ENODATA && osd->od_index_in_idif)) {
 862                         /*
 863                          * For the given OST-object, if it has neither LMA nor
 864                          * FID in XATTR_NAME_FID, then the given FID (which is
 865                          * contained in the @obj, from client RPC for locating
 866                          * the OST-object) is trusted. We use it to generate
 867                          * the LMA.
 868                          */
 869                         osd_lma_self_repair(info, osd, inode, rfid,
 870                                             LMAC_FID_ON_OST);
 871                         RETURN(0);
 872                 }
 873         }
 874
 875         if (rc < 0)
 876                 RETURN(rc);
 877
 878         if (rc > 0) {
 879                 rc = 0;
 880                 lustre_lma_swab(lma);
 881                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 882                              (CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT) &&
 883                               S_ISREG(inode->i_mode)))) {
 884                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 885                               "fid = "DFID", ino = %lu\n", osd_name(osd),
 886                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 887                               PFID(rfid), inode->i_ino);
 888                         rc = -EOPNOTSUPP;
 889                 } else {
 890                         fid = &lma->lma_self_fid;
 891                         if (lma->lma_compat & LMAC_STRIPE_INFO &&
 892                             osd->od_is_ost)
 893                                 obj->oo_pfid_in_lma = 1;
 894                         if (unlikely(lma->lma_incompat & LMAI_REMOTE_PARENT) &&
 895                             !osd->od_is_ost)
 896                                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
 897                 }
 898         }
 899
 900         if (fid != NULL && unlikely(!lu_fid_eq(rfid, fid))) {
 901                 if (fid_is_idif(rfid) && fid_is_idif(fid)) {
 902                         struct ost_id   *oi   = &info->oti_ostid;
 903                         struct lu_fid   *fid1 = &info->oti_fid3;
 904                         __u32            idx  = fid_idif_ost_idx(rfid);
 905
 906                         /*
 907                          * For old IDIF, the OST index is not part of the IDIF,
 908                          * Means that different OSTs may have the same IDIFs.
 909                          * Under such case, we need to make some compatible
 910                          * check to make sure to trigger OI scrub properly.
 911                          */
 912                         if (idx != 0 && fid_idif_ost_idx(fid) == 0) {
 913                                 /* Given @rfid is new, LMA is old. */
 914                                 fid_to_ostid(fid, oi);
 915                                 ostid_to_fid(fid1, oi, idx);
 916                                 if (lu_fid_eq(fid1, rfid)) {
 917                                         if (osd->od_index_in_idif)
 918                                                 osd_lma_self_repair(info, osd,
 919                                                         inode, rfid,
 920                                                         LMAC_FID_ON_OST);
 921                                         RETURN(0);
 922                                 }
 923                         }
 924                 }
 925
 926                 rc = -EREMCHG;
 927         }
 928
 929         RETURN(rc);
 930 }
 931
 932 struct osd_check_lmv_buf {
 933         /* please keep it as first member */
 934         struct dir_context ctx;
 935         struct osd_thread_info *oclb_info;
 936         struct osd_device *oclb_dev;
 937         int oclb_items;
 938         bool oclb_found;
 939 };
 940
 941 /**
 942  * It is called internally by ->iterate*() to filter out the
 943  * local slave object's FID of the striped directory.
 944  *
 945  * \retval      1 found the local slave's FID
 946  * \retval      0 continue to check next item
 947  * \retval      -ve for failure
 948  */
 949 #ifdef HAVE_FILLDIR_USE_CTX
 950 static int osd_stripe_dir_filldir(struct dir_context *buf,
 951 #else
 952 static int osd_stripe_dir_filldir(void *buf,
 953 #endif
 954                                   const char *name, int namelen,
 955                                   loff_t offset, __u64 ino, unsigned int d_type)
 956 {
 957         struct osd_check_lmv_buf *oclb = (struct osd_check_lmv_buf *)buf;
 958         struct osd_thread_info *oti = oclb->oclb_info;
 959         struct lu_fid *fid = &oti->oti_fid3;
 960         struct osd_inode_id *id = &oti->oti_id3;
 961         struct osd_device *dev = oclb->oclb_dev;
 962         struct inode *inode;
 963
 964         oclb->oclb_items++;
 965
 966         if (name[0] == '.')
 967                 return 0;
 968
 969         fid_zero(fid);
 970         sscanf(name + 1, SFID, RFID(fid));
 971         if (!fid_is_sane(fid))
 972                 return 0;
 973
 974         if (osd_remote_fid(oti->oti_env, dev, fid))
 975                 return 0;
 976
 977         osd_id_gen(id, ino, OSD_OII_NOGEN);
 978         inode = osd_iget(oti, dev, id);
 979         if (IS_ERR(inode))
 980                 return PTR_ERR(inode);
 981
 982         iput(inode);
 983         osd_add_oi_cache(oti, dev, id, fid);
 984         osd_oii_insert(dev, fid, id, true);
 985         oclb->oclb_found = true;
 986
 987         return 1;
 988 }
 989
 990 /*
 991  * When lookup item under striped directory, we need to locate the master
 992  * MDT-object of the striped directory firstly, then the client will send
 993  * lookup (getattr_by_name) RPC to the MDT with some slave MDT-object's FID
 994  * and the item's name. If the system is restored from MDT file level backup,
 995  * then before the OI scrub completely built the OI files, the OI mappings of
 996  * the master MDT-object and slave MDT-object may be invalid. Usually, it is
 997  * not a problem for the master MDT-object. Because when locate the master
 998  * MDT-object, we will do name based lookup (for the striped directory itself)
 999  * firstly, during such process we can setup the correct OI mapping for the
1000  * master MDT-object. But it will be trouble for the slave MDT-object. Because
1001  * the client will not trigger name based lookup on the MDT to locate the slave
1002  * MDT-object before locating item under the striped directory, then when
1003  * osd_fid_lookup(), it will find that the OI mapping for the slave MDT-object
1004  * is invalid and does not know what the right OI mapping is, then the MDT has
1005  * to return -EINPROGRESS to the client to notify that the OI scrub is rebuiding
1006  * the OI file, related OI mapping is unknown yet, please try again later. And
1007  * then client will re-try the RPC again and again until related OI mapping has
1008  * been updated. That is quite inefficient.
1009  *
1010  * To resolve above trouble, we will handle it as the following two cases:
1011  *
1012  * 1) The slave MDT-object and the master MDT-object are on different MDTs.
1013  *    It is relative easy. Be as one of remote MDT-objects, the slave MDT-object
1014  *    is linked under /REMOTE_PARENT_DIR with the name of its FID string.
1015  *    We can locate the slave MDT-object via lookup the /REMOTE_PARENT_DIR
1016  *    directly. Please check osd_fid_lookup().
1017  *
1018  * 2) The slave MDT-object and the master MDT-object reside on the same MDT.
1019  *    Under such case, during lookup the master MDT-object, we will lookup the
1020  *    slave MDT-object via readdir against the master MDT-object, because the
1021  *    slave MDT-objects information are stored as sub-directories with the name
1022  *    "${FID}:${index}". Then when find the local slave MDT-object, its OI
1023  *    mapping will be recorded. Then subsequent osd_fid_lookup() will know
1024  *    the correct OI mapping for the slave MDT-object.
1025  */
1026 static int osd_check_lmv(struct osd_thread_info *oti, struct osd_device *dev,
1027                          struct inode *inode)
1028 {
1029         struct lu_buf *buf = &oti->oti_big_buf;
1030         struct file *filp;
1031         struct lmv_mds_md_v1 *lmv1;
1032         struct osd_check_lmv_buf oclb = {
1033                 .ctx.actor = osd_stripe_dir_filldir,
1034                 .oclb_info = oti,
1035                 .oclb_dev = dev,
1036                 .oclb_found = false,
1037         };
1038         int rc = 0;
1039
1040         ENTRY;
1041         /* We should use the VFS layer to create a real dentry. */
1042         oti->oti_obj_dentry.d_inode = inode;
1043         oti->oti_obj_dentry.d_sb = inode->i_sb;
1044
1045         filp = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
1046                                  inode->i_fop);
1047         if (IS_ERR(filp))
1048                 RETURN(-ENOMEM);
1049
1050         filp->f_mode |= FMODE_64BITHASH;
1051         filp->f_pos = 0;
1052         ihold(inode);
1053 again:
1054         rc = __osd_xattr_get(inode, filp->f_path.dentry, XATTR_NAME_LMV,
1055                              buf->lb_buf, buf->lb_len);
1056         if (rc == -ERANGE) {
1057                 rc = __osd_xattr_get(inode, filp->f_path.dentry,
1058                                      XATTR_NAME_LMV, NULL, 0);
1059                 if (rc > 0) {
1060                         lu_buf_realloc(buf, rc);
1061                         if (buf->lb_buf == NULL)
1062                                 GOTO(out, rc = -ENOMEM);
1063
1064                         goto again;
1065                 }
1066         }
1067
1068         if (unlikely(rc == 0 || rc == -ENODATA))
1069                 GOTO(out, rc = 0);
1070
1071         if (rc < 0)
1072                 GOTO(out, rc);
1073
1074         if (unlikely(buf->lb_buf == NULL)) {
1075                 lu_buf_realloc(buf, rc);
1076                 if (buf->lb_buf == NULL)
1077                         GOTO(out, rc = -ENOMEM);
1078
1079                 goto again;
1080         }
1081
1082         lmv1 = buf->lb_buf;
1083         if (le32_to_cpu(lmv1->lmv_magic) != LMV_MAGIC_V1)
1084                 GOTO(out, rc = 0);
1085
1086         do {
1087                 oclb.oclb_items = 0;
1088                 rc = iterate_dir(filp, &oclb.ctx);
1089         } while (rc >= 0 && oclb.oclb_items > 0 && !oclb.oclb_found &&
1090                  filp->f_pos != LDISKFS_HTREE_EOF_64BIT);
1091 out:
1092         fput(filp);
1093         if (rc < 0)
1094                 CDEBUG(D_LFSCK,
1095                        "%s: cannot check LMV, ino = %lu/%u: rc = %d\n",
1096                        osd_ino2name(inode), inode->i_ino, inode->i_generation,
1097                        rc);
1098         else
1099                 rc = 0;
1100
1101         RETURN(rc);
1102 }
1103
1104 static int osd_fid_lookup(const struct lu_env *env, struct osd_object *obj,
1105                           const struct lu_fid *fid,
1106                           const struct lu_object_conf *conf)
1107 {
1108         struct osd_thread_info *info;
1109         struct lu_device *ldev = obj->oo_dt.do_lu.lo_dev;
1110         struct osd_device *dev;
1111         struct osd_idmap_cache *oic;
1112         struct osd_inode_id *id;
1113         struct inode *inode = NULL;
1114         struct lustre_scrub *scrub;
1115         struct scrub_file *sf;
1116         __u32 flags = SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT | SS_AUTO_FULL;
1117         __u32 saved_ino;
1118         __u32 saved_gen;
1119         int result = 0;
1120         int rc1 = 0;
1121         bool remote = false;
1122         bool trusted = true;
1123         bool updated = false;
1124         bool checked = false;
1125
1126         ENTRY;
1127
1128         LINVRNT(osd_invariant(obj));
1129         LASSERT(obj->oo_inode == NULL);
1130
1131         if (fid_is_sane(fid) == 0) {
1132                 CERROR("%s: invalid FID "DFID"\n", ldev->ld_obd->obd_name,
1133                        PFID(fid));
1134                 dump_stack();
1135                 RETURN(-EINVAL);
1136         }
1137
1138         dev = osd_dev(ldev);
1139         scrub = &dev->od_scrub.os_scrub;
1140         sf = &scrub->os_file;
1141         info = osd_oti_get(env);
1142         LASSERT(info);
1143         oic = &info->oti_cache;
1144
1145         if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT))
1146                 RETURN(-ENOENT);
1147
1148         /*
1149          * For the object is created as locking anchor, or for the object to
1150          * be created on disk. No need to osd_oi_lookup() at here because FID
1151          * shouldn't never be re-used, if it's really a duplicate FID from
1152          * unexpected reason, we should be able to detect it later by calling
1153          * do_create->osd_oi_insert().
1154          */
1155         if (conf && conf->loc_flags & LOC_F_NEW)
1156                 GOTO(out, result = 0);
1157
1158         /* Search order: 1. per-thread cache. */
1159         if (lu_fid_eq(fid, &oic->oic_fid) && likely(oic->oic_dev == dev)) {
1160                 id = &oic->oic_lid;
1161                 goto iget;
1162         }
1163
1164         id = &info->oti_id;
1165         memset(id, 0, sizeof(struct osd_inode_id));
1166         if (!list_empty(&scrub->os_inconsistent_items)) {
1167                 /* Search order: 2. OI scrub pending list. */
1168                 result = osd_oii_lookup(dev, fid, id);
1169                 if (!result)
1170                         goto iget;
1171         }
1172
1173         /*
1174          * The OI mapping in the OI file can be updated by the OI scrub
1175          * when we locate the inode via FID. So it may be not trustable.
1176          */
1177         trusted = false;
1178
1179         /* Search order: 3. OI files. */
1180         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1181         if (result == -ENOENT) {
1182                 if (!(fid_is_norm(fid) || fid_is_igif(fid)) ||
1183                     fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) ||
1184                     !ldiskfs_test_bit(osd_oi_fid2idx(dev, fid),
1185                                       sf->sf_oi_bitmap))
1186                         GOTO(out, result = 0);
1187
1188                 goto trigger;
1189         }
1190
1191         /* -ESTALE is returned if inode of OST object doesn't exist */
1192         if (result == -ESTALE &&
1193             fid_is_on_ost(info, dev, fid, OI_CHECK_FLD)) {
1194                 GOTO(out, result = 0);
1195         }
1196
1197         if (result)
1198                 GOTO(out, result);
1199
1200 iget:
1201         obj->oo_inode = NULL;
1202         /* for later passes through checks, not true on first pass */
1203         if (!IS_ERR_OR_NULL(inode))
1204                 iput(inode);
1205
1206         inode = osd_iget_check(info, dev, fid, id, trusted);
1207         if (!IS_ERR(inode)) {
1208                 obj->oo_inode = inode;
1209                 result = 0;
1210                 if (remote)
1211                         goto trigger;
1212
1213                 goto check_lma;
1214         }
1215
1216         result = PTR_ERR(inode);
1217         if (result == -ENOENT || result == -ESTALE)
1218                 GOTO(out, result = 0);
1219
1220         if (result != -EREMCHG)
1221                 GOTO(out, result);
1222
1223 trigger:
1224         /*
1225          * We still have chance to get the valid inode: for the
1226          * object which is referenced by remote name entry, the
1227          * object on the local MDT will be linked under the dir
1228          * of "/REMOTE_PARENT_DIR" with its FID string as name.
1229          *
1230          * We do not know whether the object for the given FID
1231          * is referenced by some remote name entry or not, and
1232          * especially for DNE II, a multiple-linked object may
1233          * have many name entries reside on many MDTs.
1234          *
1235          * To simplify the operation, OSD will not distinguish
1236          * more, just lookup "/REMOTE_PARENT_DIR". Usually, it
1237          * only happened for the RPC from other MDT during the
1238          * OI scrub, or for the client side RPC with FID only,
1239          * such as FID to path, or from old connected client.
1240          */
1241         if (!remote) {
1242                 rc1 = osd_lookup_in_remote_parent(info, dev, fid, id);
1243                 if (!rc1) {
1244                         remote = true;
1245                         trusted = true;
1246                         flags |= SS_AUTO_PARTIAL;
1247                         flags &= ~SS_AUTO_FULL;
1248                         goto iget;
1249                 }
1250         }
1251
1252         if (scrub->os_running) {
1253                 if (scrub->os_partial_scan && !scrub->os_in_join)
1254                         goto join;
1255
1256                 if (IS_ERR_OR_NULL(inode) || result) {
1257                         osd_oii_insert(dev, fid, id, result == -ENOENT);
1258                         GOTO(out, result = -EINPROGRESS);
1259                 }
1260
1261                 LASSERT(remote);
1262                 LASSERT(obj->oo_inode == inode);
1263
1264                 osd_oii_insert(dev, fid, id, true);
1265                 goto found;
1266         }
1267
1268         if (dev->od_scrub.os_scrub.os_auto_scrub_interval == AS_NEVER) {
1269                 if (!remote)
1270                         GOTO(out, result = -EREMCHG);
1271
1272                 LASSERT(!result);
1273                 LASSERT(obj->oo_inode == inode);
1274
1275                 osd_add_oi_cache(info, dev, id, fid);
1276                 goto found;
1277         }
1278
1279 join:
1280         rc1 = osd_scrub_start(env, dev, flags);
1281         CDEBUG_LIMIT(D_LFSCK | D_CONSOLE | D_WARNING,
1282                      "%s: trigger OI scrub by RPC for "DFID"/%u with flags %#x: rc = %d\n",
1283                      osd_name(dev), PFID(fid), id->oii_ino, flags, rc1);
1284         if (rc1 && rc1 != -EALREADY)
1285                 GOTO(out, result = -EREMCHG);
1286
1287         if (IS_ERR_OR_NULL(inode) || result) {
1288                 osd_oii_insert(dev, fid, id, result == -ENOENT);
1289                 GOTO(out, result = -EINPROGRESS);
1290         }
1291
1292         LASSERT(remote);
1293         LASSERT(obj->oo_inode == inode);
1294
1295         osd_oii_insert(dev, fid, id, true);
1296         goto found;
1297
1298 check_lma:
1299         checked = true;
1300         if (unlikely(obj->oo_header))
1301                 goto found;
1302
1303         result = osd_check_lma(env, obj);
1304         if (!result)
1305                 goto found;
1306
1307         LASSERTF(id->oii_ino == inode->i_ino &&
1308                  id->oii_gen == inode->i_generation,
1309                  "locate wrong inode for FID: "DFID", %u/%u => %ld/%u\n",
1310                  PFID(fid), id->oii_ino, id->oii_gen,
1311                  inode->i_ino, inode->i_generation);
1312
1313         saved_ino = inode->i_ino;
1314         saved_gen = inode->i_generation;
1315
1316         if (unlikely(result == -ENODATA)) {
1317                 /*
1318                  * If the OI scrub updated the OI mapping by race, it
1319                  * must be valid. Trust the inode that has no LMA EA.
1320                  */
1321                 if (updated)
1322                         goto found;
1323
1324                 result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1325                 if (!result) {
1326                         /*
1327                          * The OI mapping is still there, the inode is still
1328                          * valid. It is just becaues the inode has no LMA EA.
1329                          */
1330                         if (saved_ino == id->oii_ino &&
1331                             saved_gen == id->oii_gen)
1332                                 goto found;
1333
1334                         /*
1335                          * It is the OI scrub updated the OI mapping by race.
1336                          * The new OI mapping must be valid.
1337                          */
1338                         trusted = true;
1339                         updated = true;
1340                         goto iget;
1341                 }
1342
1343                 /*
1344                  * "result == -ENOENT" means that the OI mappinghas been
1345                  * removed by race, so the inode belongs to other object.
1346                  *
1347                  * Others error can be returned  directly.
1348                  */
1349                 if (result == -ENOENT) {
1350                         LASSERT(trusted);
1351
1352                         obj->oo_inode = NULL;
1353                         result = 0;
1354                 }
1355         }
1356
1357         if (result != -EREMCHG)
1358                 GOTO(out, result);
1359
1360         LASSERT(!updated);
1361
1362         /*
1363          * if two OST objects map to the same inode, and inode mode is
1364          * (S_IFREG | S_ISUID | S_ISGID | S_ISVTX | 0666), which means it's
1365          * reserved by precreate, and not written yet, in this case, don't
1366          * set inode for the object whose FID mismatch, so that it can create
1367          * inode and not block precreate.
1368          */
1369         if (fid_is_on_ost(info, dev, fid, OI_CHECK_FLD) &&
1370             inode->i_mode == (S_IFREG | S_ISUID | S_ISGID | S_ISVTX | 0666)) {
1371                 obj->oo_inode = NULL;
1372                 GOTO(out, result = 0);
1373         }
1374
1375         result = osd_oi_lookup(info, dev, fid, id, OI_CHECK_FLD);
1376         /*
1377          * "result == -ENOENT" means the cached OI mapping has been removed
1378          * from the OI file by race, above inode belongs to other object.
1379          */
1380         if (result == -ENOENT) {
1381                 LASSERT(trusted);
1382
1383                 obj->oo_inode = NULL;
1384                 GOTO(out, result = 0);
1385         }
1386
1387         if (result)
1388                 GOTO(out, result);
1389
1390         if (saved_ino == id->oii_ino && saved_gen == id->oii_gen) {
1391                 result = -EREMCHG;
1392                 osd_scrub_refresh_mapping(info, dev, fid, id, DTO_INDEX_DELETE,
1393                                           true, 0, NULL);
1394                 goto trigger;
1395         }
1396
1397         /*
1398          * It is the OI scrub updated the OI mapping by race.
1399          * The new OI mapping must be valid.
1400          */
1401         trusted = true;
1402         updated = true;
1403         goto iget;
1404
1405 found:
1406         if (!checked) {
1407                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
1408                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
1409
1410                 result = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
1411                 if (!result) {
1412                         if (lma->lma_compat & LMAC_STRIPE_INFO &&
1413                             dev->od_is_ost)
1414                                 obj->oo_pfid_in_lma = 1;
1415                         if (unlikely(lma->lma_incompat & LMAI_REMOTE_PARENT) &&
1416                             !dev->od_is_ost)
1417                                 lu_object_set_agent_entry(&obj->oo_dt.do_lu);
1418                 } else if (result != -ENODATA) {
1419                         GOTO(out, result);
1420                 }
1421         }
1422
1423         obj->oo_compat_dot_created = 1;
1424         obj->oo_compat_dotdot_created = 1;
1425
1426         if (S_ISDIR(inode->i_mode) &&
1427             (flags & SS_AUTO_PARTIAL || sf->sf_status == SS_SCANNING))
1428                 osd_check_lmv(info, dev, inode);
1429
1430         result = osd_attach_jinode(inode);
1431         if (result)
1432                 GOTO(out, result);
1433
1434         if (!ldiskfs_pdo)
1435                 GOTO(out, result = 0);
1436
1437         LASSERT(!obj->oo_hl_head);
1438         obj->oo_hl_head = ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
1439
1440         GOTO(out, result = (!obj->oo_hl_head ? -ENOMEM : 0));
1441
1442 out:
1443         if (result || !obj->oo_inode) {
1444                 if (!IS_ERR_OR_NULL(inode))
1445                         iput(inode);
1446
1447                 obj->oo_inode = NULL;
1448                 if (trusted)
1449                         fid_zero(&oic->oic_fid);
1450         }
1451
1452         LINVRNT(osd_invariant(obj));
1453         return result;
1454 }
1455
1456 /*
1457  * Concurrency: shouldn't matter.
1458  */
1459 static void osd_object_init0(struct osd_object *obj)
1460 {
1461         LASSERT(obj->oo_inode != NULL);
1462         obj->oo_dt.do_body_ops = &osd_body_ops;
1463         obj->oo_dt.do_lu.lo_header->loh_attr |=
1464                 (LOHA_EXISTS | (obj->oo_inode->i_mode & S_IFMT));
1465 }
1466
1467 /*
1468  * Concurrency: no concurrent access is possible that early in object
1469  * life-cycle.
1470  */
1471 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
1472                            const struct lu_object_conf *conf)
1473 {
1474         struct osd_object *obj = osd_obj(l);
1475         int result;
1476
1477         LINVRNT(osd_invariant(obj));
1478
1479         if (OBD_FAIL_PRECHECK(OBD_FAIL_MDS_LLOG_UMOUNT_RACE) &&
1480             cfs_fail_val == 2) {
1481                 struct osd_thread_info *info = osd_oti_get(env);
1482                 struct osd_idmap_cache *oic = &info->oti_cache;
1483                 /* invalidate thread cache */
1484                 memset(&oic->oic_fid, 0, sizeof(oic->oic_fid));
1485         }
1486         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
1487                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
1488                 l->lo_header->loh_attr |= LOHA_EXISTS;
1489                 return 0;
1490         }
1491
1492         result = osd_fid_lookup(env, obj, lu_object_fid(l), conf);
1493         obj->oo_dt.do_body_ops = &osd_body_ops_new;
1494         if (result == 0 && obj->oo_inode != NULL) {
1495                 struct osd_thread_info *oti = osd_oti_get(env);
1496                 struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
1497
1498                 osd_object_init0(obj);
1499                 if (unlikely(obj->oo_header))
1500                         return 0;
1501
1502                 result = osd_get_lma(oti, obj->oo_inode,
1503                                      &oti->oti_obj_dentry, loa);
1504                 if (!result) {
1505                         /*
1506                          * Convert LMAI flags to lustre LMA flags
1507                          * and cache it to oo_lma_flags
1508                          */
1509                         obj->oo_lma_flags =
1510                                 lma_to_lustre_flags(loa->loa_lma.lma_incompat);
1511                 } else if (result == -ENODATA) {
1512                         result = 0;
1513                 }
1514         }
1515         obj->oo_dirent_count = LU_DIRENT_COUNT_UNSET;
1516
1517         LINVRNT(osd_invariant(obj));
1518         return result;
1519 }
1520
1521 /*
1522  * The first part of oxe_buf is xattr name, and is '\0' terminated.
1523  * The left part is for value, binary mode.
1524  */
1525 struct osd_xattr_entry {
1526         struct list_head        oxe_list;
1527         size_t                  oxe_len;
1528         size_t                  oxe_namelen;
1529         bool                    oxe_exist;
1530         struct rcu_head         oxe_rcu;
1531         char                    oxe_buf[0];
1532 };
1533
1534 static int osd_oxc_get(struct osd_object *obj, const char *name,
1535                        struct lu_buf *buf)
1536 {
1537         struct osd_xattr_entry *tmp;
1538         struct osd_xattr_entry *oxe = NULL;
1539         size_t namelen = strlen(name);
1540         int rc;
1541
1542         rcu_read_lock();
1543         list_for_each_entry_rcu(tmp, &obj->oo_xattr_list, oxe_list) {
1544                 if (namelen == tmp->oxe_namelen &&
1545                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1546                         oxe = tmp;
1547                         break;
1548                 }
1549         }
1550
1551         if (oxe == NULL)
1552                 GOTO(out, rc = -ENOENT);
1553
1554         if (!oxe->oxe_exist)
1555                 GOTO(out, rc = -ENODATA);
1556
1557         /* vallen */
1558         rc = oxe->oxe_len - sizeof(*oxe) - oxe->oxe_namelen - 1;
1559         LASSERT(rc > 0);
1560
1561         if (buf->lb_buf == NULL)
1562                 GOTO(out, rc);
1563
1564         if (buf->lb_len < rc)
1565                 GOTO(out, rc = -ERANGE);
1566
1567         memcpy(buf->lb_buf, &oxe->oxe_buf[namelen + 1], rc);
1568 out:
1569         rcu_read_unlock();
1570
1571         return rc;
1572 }
1573
1574 static void osd_oxc_free(struct rcu_head *head)
1575 {
1576         struct osd_xattr_entry *oxe;
1577
1578         oxe = container_of(head, struct osd_xattr_entry, oxe_rcu);
1579         OBD_FREE(oxe, oxe->oxe_len);
1580 }
1581
1582 static void osd_oxc_add(struct osd_object *obj, const char *name,
1583                         const char *buf, int buflen)
1584 {
1585         struct osd_xattr_entry *oxe;
1586         struct osd_xattr_entry *old = NULL;
1587         struct osd_xattr_entry *tmp;
1588         size_t namelen = strlen(name);
1589         size_t len = sizeof(*oxe) + namelen + 1 + buflen;
1590
1591         OBD_ALLOC(oxe, len);
1592         if (oxe == NULL)
1593                 return;
1594
1595         INIT_LIST_HEAD(&oxe->oxe_list);
1596         oxe->oxe_len = len;
1597         oxe->oxe_namelen = namelen;
1598         memcpy(oxe->oxe_buf, name, namelen);
1599         if (buflen > 0) {
1600                 LASSERT(buf != NULL);
1601                 memcpy(oxe->oxe_buf + namelen + 1, buf, buflen);
1602                 oxe->oxe_exist = true;
1603         } else {
1604                 oxe->oxe_exist = false;
1605         }
1606
1607         /* this should be rarely called, just remove old and add new */
1608         spin_lock(&obj->oo_guard);
1609         list_for_each_entry(tmp, &obj->oo_xattr_list, oxe_list) {
1610                 if (namelen == tmp->oxe_namelen &&
1611                     strncmp(name, tmp->oxe_buf, namelen) == 0) {
1612                         old = tmp;
1613                         break;
1614                 }
1615         }
1616         if (old != NULL) {
1617                 list_replace_rcu(&old->oxe_list, &oxe->oxe_list);
1618                 call_rcu(&old->oxe_rcu, osd_oxc_free);
1619         } else {
1620                 list_add_tail_rcu(&oxe->oxe_list, &obj->oo_xattr_list);
1621         }
1622         spin_unlock(&obj->oo_guard);
1623 }
1624
1625 static void osd_oxc_del(struct osd_object *obj, const char *name)
1626 {
1627         struct osd_xattr_entry *oxe;
1628         size_t namelen = strlen(name);
1629
1630         spin_lock(&obj->oo_guard);
1631         list_for_each_entry(oxe, &obj->oo_xattr_list, oxe_list) {
1632                 if (namelen == oxe->oxe_namelen &&
1633                     strncmp(name, oxe->oxe_buf, namelen) == 0) {
1634                         list_del_rcu(&oxe->oxe_list);
1635                         call_rcu(&oxe->oxe_rcu, osd_oxc_free);
1636                         break;
1637                 }
1638         }
1639         spin_unlock(&obj->oo_guard);
1640 }
1641
1642 static void osd_oxc_fini(struct osd_object *obj)
1643 {
1644         struct osd_xattr_entry *oxe, *next;
1645
1646         list_for_each_entry_safe(oxe, next, &obj->oo_xattr_list, oxe_list) {
1647                 list_del(&oxe->oxe_list);
1648                 OBD_FREE(oxe, oxe->oxe_len);
1649         }
1650 }
1651
1652 /*
1653  * Concurrency: no concurrent access is possible that late in object
1654  * life-cycle.
1655  */
1656 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
1657 {
1658         struct osd_object *obj = osd_obj(l);
1659         struct lu_object_header *h = obj->oo_header;
1660
1661         LINVRNT(osd_invariant(obj));
1662
1663         osd_oxc_fini(obj);
1664         dt_object_fini(&obj->oo_dt);
1665         if (obj->oo_hl_head != NULL)
1666                 ldiskfs_htree_lock_head_free(obj->oo_hl_head);
1667         /* obj doesn't contain an lu_object_header, so we don't need call_rcu */
1668         OBD_FREE_PTR(obj);
1669         if (unlikely(h))
1670                 lu_object_header_free(h);
1671 }
1672
1673 /*
1674  * Concurrency: no concurrent access is possible that late in object
1675  * life-cycle.
1676  */
1677 static void osd_index_fini(struct osd_object *o)
1678 {
1679         struct iam_container *bag;
1680
1681         if (o->oo_dir != NULL) {
1682                 bag = &o->oo_dir->od_container;
1683                 if (o->oo_inode != NULL) {
1684                         if (bag->ic_object == o->oo_inode)
1685                                 iam_container_fini(bag);
1686                 }
1687                 OBD_FREE_PTR(o->oo_dir);
1688                 o->oo_dir = NULL;
1689         }
1690 }
1691
1692 enum {
1693         OSD_TXN_OI_DELETE_CREDITS    = 20,
1694         OSD_TXN_INODE_DELETE_CREDITS = 20
1695 };
1696
1697 /*
1698  * Journal
1699  */
1700
1701 #if OSD_THANDLE_STATS
1702 /**
1703  * Set time when the handle is allocated
1704  */
1705 static void osd_th_alloced(struct osd_thandle *oth)
1706 {
1707         oth->oth_alloced = ktime_get();
1708 }
1709
1710 /**
1711  * Set time when the handle started
1712  */
1713 static void osd_th_started(struct osd_thandle *oth)
1714 {
1715         oth->oth_started = ktime_get();
1716 }
1717
1718 /**
1719  * Check whether the we deal with this handle for too long.
1720  */
1721 static void __osd_th_check_slow(void *oth, struct osd_device *dev,
1722                                 ktime_t alloced, ktime_t started,
1723                                 ktime_t closed)
1724 {
1725         ktime_t now = ktime_get();
1726
1727         LASSERT(dev != NULL);
1728
1729         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_STARTING,
1730                             ktime_us_delta(started, alloced));
1731         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_OPEN,
1732                             ktime_us_delta(closed, started));
1733         lprocfs_counter_add(dev->od_stats, LPROC_OSD_THANDLE_CLOSING,
1734                             ktime_us_delta(now, closed));
1735
1736         if (ktime_before(ktime_add_ns(alloced, 30 * NSEC_PER_SEC), now)) {
1737                 CWARN("transaction handle %p was open for too long: now %lld, alloced %lld, started %lld, closed %lld\n",
1738                                 oth, now, alloced, started, closed);
1739                 libcfs_debug_dumpstack(NULL);
1740         }
1741 }
1742
1743 #define OSD_CHECK_SLOW_TH(oth, dev, expr)                               \
1744 {                                                                       \
1745         ktime_t __closed = ktime_get();                                 \
1746         ktime_t __alloced = oth->oth_alloced;                           \
1747         ktime_t __started = oth->oth_started;                           \
1748                                                                         \
1749         expr;                                                           \
1750         __osd_th_check_slow(oth, dev, __alloced, __started, __closed);  \
1751 }
1752
1753 #else /* OSD_THANDLE_STATS */
1754
1755 #define osd_th_alloced(h)                  do {} while(0)
1756 #define osd_th_started(h)                  do {} while(0)
1757 #define OSD_CHECK_SLOW_TH(oth, dev, expr)  expr
1758
1759 #endif /* OSD_THANDLE_STATS */
1760
1761 /*
1762  * Concurrency: doesn't access mutable data.
1763  */
1764 static int osd_param_is_not_sane(const struct osd_device *dev,
1765                                  const struct thandle *th)
1766 {
1767         struct osd_thandle *oh = container_of(th, typeof(*oh), ot_super);
1768
1769         return oh->ot_credits > osd_transaction_size(dev);
1770 }
1771
1772 /*
1773  * Concurrency: shouldn't matter.
1774  */
1775 static void osd_trans_commit_cb(struct super_block *sb,
1776                                 struct ldiskfs_journal_cb_entry *jcb, int error)
1777 {
1778         struct osd_thandle *oh = container_of(jcb, struct osd_thandle, ot_jcb);
1779         struct thandle *th = &oh->ot_super;
1780         struct lu_device *lud = &th->th_dev->dd_lu_dev;
1781         struct osd_device *osd = osd_dev(lud);
1782         struct dt_txn_commit_cb *dcb, *tmp;
1783
1784         LASSERT(oh->ot_handle == NULL);
1785
1786         if (error)
1787                 CERROR("transaction @0x%p commit error: %d\n", th, error);
1788
1789         /* call per-transaction callbacks if any */
1790         list_for_each_entry_safe(dcb, tmp, &oh->ot_commit_dcb_list,
1791                                  dcb_linkage) {
1792                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
1793                          "commit callback entry: magic=%x name='%s'\n",
1794                          dcb->dcb_magic, dcb->dcb_name);
1795                 list_del_init(&dcb->dcb_linkage);
1796                 dcb->dcb_func(NULL, th, dcb, error);
1797         }
1798
1799         lu_ref_del_at(&lud->ld_reference, &oh->ot_dev_link, "osd-tx", th);
1800         if (atomic_dec_and_test(&osd->od_commit_cb_in_flight))
1801                 wake_up(&osd->od_commit_cb_done);
1802         th->th_dev = NULL;
1803
1804         OBD_FREE_PTR(oh);
1805 }
1806
1807 static struct thandle *osd_trans_create(const struct lu_env *env,
1808                                         struct dt_device *d)
1809 {
1810         struct osd_thread_info *oti = osd_oti_get(env);
1811         struct osd_iobuf *iobuf = &oti->oti_iobuf;
1812         struct osd_thandle *oh;
1813         struct thandle *th;
1814
1815         ENTRY;
1816
1817         if (d->dd_rdonly) {
1818                 CERROR("%s: someone try to start transaction under "
1819                        "readonly mode, should be disabled.\n",
1820                        osd_name(osd_dt_dev(d)));
1821                 dump_stack();
1822                 RETURN(ERR_PTR(-EROFS));
1823         }
1824
1825         /* on pending IO in this thread should left from prev. request */
1826         LASSERT(atomic_read(&iobuf->dr_numreqs) == 0);
1827
1828         sb_start_write(osd_sb(osd_dt_dev(d)));
1829
1830         OBD_ALLOC_GFP(oh, sizeof(*oh), GFP_NOFS);
1831         if (!oh) {
1832                 sb_end_write(osd_sb(osd_dt_dev(d)));
1833                 RETURN(ERR_PTR(-ENOMEM));
1834         }
1835
1836         oh->ot_quota_trans = &oti->oti_quota_trans;
1837         memset(oh->ot_quota_trans, 0, sizeof(*oh->ot_quota_trans));
1838         th = &oh->ot_super;
1839         th->th_dev = d;
1840         th->th_result = 0;
1841         oh->ot_credits = 0;
1842         oh->oh_declared_ext = 0;
1843         INIT_LIST_HEAD(&oh->ot_commit_dcb_list);
1844         INIT_LIST_HEAD(&oh->ot_stop_dcb_list);
1845         INIT_LIST_HEAD(&oh->ot_trunc_locks);
1846         osd_th_alloced(oh);
1847
1848         memset(oti->oti_declare_ops, 0,
1849                sizeof(oti->oti_declare_ops));
1850         memset(oti->oti_declare_ops_cred, 0,
1851                sizeof(oti->oti_declare_ops_cred));
1852         memset(oti->oti_declare_ops_used, 0,
1853                sizeof(oti->oti_declare_ops_used));
1854
1855         oti->oti_ins_cache_depth++;
1856
1857         RETURN(th);
1858 }
1859
1860 void osd_trans_dump_creds(const struct lu_env *env, struct thandle *th)
1861 {
1862         struct osd_thread_info *oti = osd_oti_get(env);
1863         struct osd_thandle *oh;
1864
1865         oh = container_of(th, struct osd_thandle, ot_super);
1866         LASSERT(oh != NULL);
1867
1868         CWARN("  create: %u/%u/%u, destroy: %u/%u/%u\n",
1869               oti->oti_declare_ops[OSD_OT_CREATE],
1870               oti->oti_declare_ops_cred[OSD_OT_CREATE],
1871               oti->oti_declare_ops_used[OSD_OT_CREATE],
1872               oti->oti_declare_ops[OSD_OT_DESTROY],
1873               oti->oti_declare_ops_cred[OSD_OT_DESTROY],
1874               oti->oti_declare_ops_used[OSD_OT_DESTROY]);
1875         CWARN("  attr_set: %u/%u/%u, xattr_set: %u/%u/%u\n",
1876               oti->oti_declare_ops[OSD_OT_ATTR_SET],
1877               oti->oti_declare_ops_cred[OSD_OT_ATTR_SET],
1878               oti->oti_declare_ops_used[OSD_OT_ATTR_SET],
1879               oti->oti_declare_ops[OSD_OT_XATTR_SET],
1880               oti->oti_declare_ops_cred[OSD_OT_XATTR_SET],
1881               oti->oti_declare_ops_used[OSD_OT_XATTR_SET]);
1882         CWARN("  write: %u/%u/%u, punch: %u/%u/%u, quota %u/%u/%u\n",
1883               oti->oti_declare_ops[OSD_OT_WRITE],
1884               oti->oti_declare_ops_cred[OSD_OT_WRITE],
1885               oti->oti_declare_ops_used[OSD_OT_WRITE],
1886               oti->oti_declare_ops[OSD_OT_PUNCH],
1887               oti->oti_declare_ops_cred[OSD_OT_PUNCH],
1888               oti->oti_declare_ops_used[OSD_OT_PUNCH],
1889               oti->oti_declare_ops[OSD_OT_QUOTA],
1890               oti->oti_declare_ops_cred[OSD_OT_QUOTA],
1891               oti->oti_declare_ops_used[OSD_OT_QUOTA]);
1892         CWARN("  insert: %u/%u/%u, delete: %u/%u/%u\n",
1893               oti->oti_declare_ops[OSD_OT_INSERT],
1894               oti->oti_declare_ops_cred[OSD_OT_INSERT],
1895               oti->oti_declare_ops_used[OSD_OT_INSERT],
1896               oti->oti_declare_ops[OSD_OT_DELETE],
1897               oti->oti_declare_ops_cred[OSD_OT_DELETE],
1898               oti->oti_declare_ops_used[OSD_OT_DELETE]);
1899         CWARN("  ref_add: %u/%u/%u, ref_del: %u/%u/%u\n",
1900               oti->oti_declare_ops[OSD_OT_REF_ADD],
1901               oti->oti_declare_ops_cred[OSD_OT_REF_ADD],
1902               oti->oti_declare_ops_used[OSD_OT_REF_ADD],
1903               oti->oti_declare_ops[OSD_OT_REF_DEL],
1904               oti->oti_declare_ops_cred[OSD_OT_REF_DEL],
1905               oti->oti_declare_ops_used[OSD_OT_REF_DEL]);
1906 }
1907
1908 /*
1909  * Concurrency: shouldn't matter.
1910  */
1911 static int osd_trans_start(const struct lu_env *env, struct dt_device *d,
1912                            struct thandle *th)
1913 {
1914         struct osd_thread_info *oti = osd_oti_get(env);
1915         struct osd_device *dev = osd_dt_dev(d);
1916         handle_t *jh;
1917         struct osd_thandle *oh;
1918         int rc;
1919
1920         ENTRY;
1921
1922         LASSERT(current->journal_info == NULL);
1923
1924         oh = container_of(th, struct osd_thandle, ot_super);
1925         LASSERT(oh != NULL);
1926         LASSERT(oh->ot_handle == NULL);
1927
1928         rc = dt_txn_hook_start(env, d, th);
1929         if (rc != 0)
1930                 GOTO(out, rc);
1931
1932         if (unlikely(osd_param_is_not_sane(dev, th))) {
1933                 static unsigned long last_printed;
1934                 static int last_credits;
1935
1936                 /*
1937                  * don't make noise on a tiny testing systems
1938                  * actual credits misuse will be caught anyway
1939                  */
1940                 if (last_credits != oh->ot_credits &&
1941                     time_after(jiffies, last_printed +
1942                                cfs_time_seconds(60)) &&
1943                     osd_transaction_size(dev) > 512) {
1944                         CWARN("%s: credits %u > trans_max %u\n", osd_name(dev),
1945                               oh->ot_credits, osd_transaction_size(dev));
1946                         osd_trans_dump_creds(env, th);
1947                         libcfs_debug_dumpstack(NULL);
1948                         last_credits = oh->ot_credits;
1949                         last_printed = jiffies;
1950                 }
1951                 /*
1952                  * XXX Limit the credits to 'max_transaction_buffers', and
1953                  *     let the underlying filesystem to catch the error if
1954                  *     we really need so many credits.
1955                  *
1956                  *     This should be removed when we can calculate the
1957                  *     credits precisely.
1958                  */
1959                 oh->ot_credits = osd_transaction_size(dev);
1960         } else if (ldiskfs_track_declares_assert != 0) {
1961                 /*
1962                  * reserve few credits to prevent an assertion in JBD
1963                  * our debugging mechanism will be able to detected
1964                  * overuse. this can help to debug single-update
1965                  * transactions
1966                  */
1967                 oh->ot_credits += 10;
1968                 if (unlikely(osd_param_is_not_sane(dev, th)))
1969                         oh->ot_credits = osd_transaction_size(dev);
1970         }
1971
1972         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_TXN_START))
1973                 GOTO(out, rc = -EIO);
1974
1975         /*
1976          * XXX temporary stuff. Some abstraction layer should
1977          * be used.
1978          */
1979         jh = osd_journal_start_sb(osd_sb(dev), LDISKFS_HT_MISC, oh->ot_credits);
1980         osd_th_started(oh);
1981         if (!IS_ERR(jh)) {
1982                 oh->ot_handle = jh;
1983                 LASSERT(oti->oti_txns == 0);
1984
1985                 atomic_inc(&dev->od_commit_cb_in_flight);
1986                 lu_ref_add_at(&d->dd_lu_dev.ld_reference, &oh->ot_dev_link,
1987                               "osd-tx", th);
1988                 oti->oti_txns++;
1989                 rc = 0;
1990         } else {
1991                 rc = PTR_ERR(jh);
1992         }
1993 out:
1994         RETURN(rc);
1995 }
1996
1997 static int osd_seq_exists(const struct lu_env *env,
1998                           struct osd_device *osd, u64 seq)
1999 {
2000         struct lu_seq_range *range = &osd_oti_get(env)->oti_seq_range;
2001         struct seq_server_site *ss = osd_seq_site(osd);
2002         int rc;
2003
2004         ENTRY;
2005
2006         LASSERT(ss != NULL);
2007         LASSERT(ss->ss_server_fld != NULL);
2008
2009         rc = osd_fld_lookup(env, osd, seq, range);
2010         if (rc != 0) {
2011                 if (rc != -ENOENT)
2012                         CERROR("%s: can't lookup FLD sequence %#llx: rc = %d\n",
2013                                osd_name(osd), seq, rc);
2014                 RETURN(0);
2015         }
2016
2017         RETURN(ss->ss_node_id == range->lsr_index);
2018 }
2019
2020 static void osd_trans_stop_cb(struct osd_thandle *oth, int result)
2021 {
2022         struct dt_txn_commit_cb *dcb;
2023         struct dt_txn_commit_cb *tmp;
2024
2025         /* call per-transaction stop callbacks if any */
2026         list_for_each_entry_safe(dcb, tmp, &oth->ot_stop_dcb_list,
2027                                  dcb_linkage) {
2028                 LASSERTF(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC,
2029                          "commit callback entry: magic=%x name='%s'\n",
2030                          dcb->dcb_magic, dcb->dcb_name);
2031                 list_del_init(&dcb->dcb_linkage);
2032                 dcb->dcb_func(NULL, &oth->ot_super, dcb, result);
2033         }
2034 }
2035
2036 /*
2037  * Concurrency: shouldn't matter.
2038  */
2039 static int osd_trans_stop(const struct lu_env *env, struct dt_device *dt,
2040                           struct thandle *th)
2041 {
2042         struct osd_thread_info *oti = osd_oti_get(env);
2043         struct osd_thandle *oh;
2044         struct osd_iobuf *iobuf = &oti->oti_iobuf;
2045         struct osd_device *osd = osd_dt_dev(th->th_dev);
2046         struct qsd_instance *qsd = osd_def_qsd(osd);
2047         struct lquota_trans *qtrans;
2048         LIST_HEAD(truncates);
2049         int rc = 0, remove_agents = 0;
2050
2051         ENTRY;
2052
2053         oh = container_of(th, struct osd_thandle, ot_super);
2054
2055         remove_agents = oh->ot_remove_agents;
2056
2057         qtrans = oh->ot_quota_trans;
2058         oh->ot_quota_trans = NULL;
2059
2060         /* move locks to local list, stop tx, execute truncates */
2061         list_splice(&oh->ot_trunc_locks, &truncates);
2062
2063         if (oh->ot_handle != NULL) {
2064                 int rc2;
2065
2066                 handle_t *hdl = oh->ot_handle;
2067
2068                 /*
2069                  * add commit callback
2070                  * notice we don't do this in osd_trans_start()
2071                  * as underlying transaction can change during truncate
2072                  */
2073                 ldiskfs_journal_callback_add(hdl, osd_trans_commit_cb,
2074                                              &oh->ot_jcb);
2075
2076                 LASSERT(oti->oti_txns == 1);
2077                 oti->oti_txns--;
2078
2079                 rc = dt_txn_hook_stop(env, th);
2080                 if (rc != 0)
2081                         CERROR("%s: failed in transaction hook: rc = %d\n",
2082                                osd_name(osd), rc);
2083
2084                 osd_trans_stop_cb(oh, rc);
2085                 /* hook functions might modify th_sync */
2086                 hdl->h_sync = th->th_sync;
2087
2088                 oh->ot_handle = NULL;
2089                 OSD_CHECK_SLOW_TH(oh, osd, rc2 = ldiskfs_journal_stop(hdl));
2090                 if (rc2 != 0)
2091                         CERROR("%s: failed to stop transaction: rc = %d\n",
2092                                osd_name(osd), rc2);
2093                 if (!rc)
2094                         rc = rc2;
2095
2096                 /* We preserve the origin behavior of ignoring any
2097                  * failures with the underlying punch / truncate
2098                  * operation. We do record for debugging if an error
2099                  * does occur in the lctl dk logs.
2100                  */
2101                 rc2 = osd_process_truncates(env, &truncates);
2102                 if (rc2 != 0)
2103                         CERROR("%s: failed truncate process: rc = %d\n",
2104                                osd_name(osd), rc2);
2105         } else {
2106                 osd_trans_stop_cb(oh, th->th_result);
2107                 OBD_FREE_PTR(oh);
2108         }
2109
2110         osd_trunc_unlock_all(env, &truncates);
2111
2112         /* inform the quota slave device that the transaction is stopping */
2113         qsd_op_end(env, qsd, qtrans);
2114
2115         /*
2116          * as we want IO to journal and data IO be concurrent, we don't block
2117          * awaiting data IO completion in osd_do_bio(), instead we wait here
2118          * once transaction is submitted to the journal. all reqular requests
2119          * don't do direct IO (except read/write), thus this wait_event becomes
2120          * no-op for them.
2121          *
2122          * IMPORTANT: we have to wait till any IO submited by the thread is
2123          * completed otherwise iobuf may be corrupted by different request
2124          */
2125         wait_event(iobuf->dr_wait,
2126                        atomic_read(&iobuf->dr_numreqs) == 0);
2127         osd_fini_iobuf(osd, iobuf);
2128         if (!rc)
2129                 rc = iobuf->dr_error;
2130
2131         if (unlikely(remove_agents != 0))
2132                 osd_process_scheduled_agent_removals(env, osd);
2133
2134         LASSERT(oti->oti_ins_cache_depth > 0);
2135         oti->oti_ins_cache_depth--;
2136         /* reset OI cache for safety */
2137         if (oti->oti_ins_cache_depth == 0)
2138                 oti->oti_ins_cache_used = 0;
2139
2140         sb_end_write(osd_sb(osd));
2141
2142         RETURN(rc);
2143 }
2144
2145 static int osd_trans_cb_add(struct thandle *th, struct dt_txn_commit_cb *dcb)
2146 {
2147         struct osd_thandle *oh = container_of(th, struct osd_thandle,
2148                                               ot_super);
2149
2150         LASSERT(dcb->dcb_magic == TRANS_COMMIT_CB_MAGIC);
2151         LASSERT(&dcb->dcb_func != NULL);
2152         if (dcb->dcb_flags & DCB_TRANS_STOP)
2153                 list_add(&dcb->dcb_linkage, &oh->ot_stop_dcb_list);
2154         else
2155                 list_add(&dcb->dcb_linkage, &oh->ot_commit_dcb_list);
2156
2157         return 0;
2158 }
2159
2160 /*
2161  * Called just before object is freed. Releases all resources except for
2162  * object itself (that is released by osd_object_free()).
2163  *
2164  * Concurrency: no concurrent access is possible that late in object
2165  * life-cycle.
2166  */
2167 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
2168 {
2169         struct osd_object *obj = osd_obj(l);
2170         struct qsd_instance *qsd = osd_def_qsd(osd_obj2dev(obj));
2171         struct inode *inode = obj->oo_inode;
2172         __u64 projid;
2173         qid_t uid;
2174         qid_t gid;
2175
2176         LINVRNT(osd_invariant(obj));
2177
2178         /*
2179          * If object is unlinked remove fid->ino mapping from object index.
2180          */
2181
2182         osd_index_fini(obj);
2183
2184         if (!inode)
2185                 return;
2186
2187         if (osd_has_index(obj) &&  obj->oo_dt.do_index_ops == &osd_index_iam_ops)
2188                 ldiskfs_set_inode_flag(inode, LDISKFS_INODE_JOURNAL_DATA);
2189
2190         uid = i_uid_read(inode);
2191         gid = i_gid_read(inode);
2192         projid = i_projid_read(inode);
2193
2194         obj->oo_inode = NULL;
2195         iput(inode);
2196
2197         /* do not rebalance quota if the caller needs to release memory
2198          * otherwise qsd_refresh_usage() may went into a new ldiskfs
2199          * transaction and risk to deadlock - LU-12178 */
2200         if (current->flags & (PF_MEMALLOC | PF_KSWAPD))
2201                 return;
2202
2203         if (!obj->oo_header && qsd) {
2204                 struct osd_thread_info *info = osd_oti_get(env);
2205                 struct lquota_id_info *qi = &info->oti_qi;
2206
2207                 /* Release granted quota to master if necessary */
2208                 qi->lqi_id.qid_uid = uid;
2209                 qsd_op_adjust(env, qsd, &qi->lqi_id, USRQUOTA);
2210
2211                 qi->lqi_id.qid_uid = gid;
2212                 qsd_op_adjust(env, qsd, &qi->lqi_id, GRPQUOTA);
2213
2214                 qi->lqi_id.qid_uid = projid;
2215                 qsd_op_adjust(env, qsd, &qi->lqi_id, PRJQUOTA);
2216         }
2217 }
2218
2219 /*
2220  * Concurrency: ->loo_object_release() is called under site spin-lock.
2221  */
2222 static void osd_object_release(const struct lu_env *env,
2223                                struct lu_object *l)
2224 {
2225         struct osd_object *o = osd_obj(l);
2226
2227         /*
2228          * nobody should be releasing a non-destroyed object with nlink=0
2229          * the API allows this, but ldiskfs doesn't like and then report
2230          * this inode as deleted
2231          */
2232         LASSERT(!(o->oo_destroyed == 0 && o->oo_inode &&
2233                   o->oo_inode->i_nlink == 0));
2234 }
2235
2236 /*
2237  * Concurrency: shouldn't matter.
2238  */
2239 static int osd_object_print(const struct lu_env *env, void *cookie,
2240                             lu_printer_t p, const struct lu_object *l)
2241 {
2242         struct osd_object *o = osd_obj(l);
2243         struct iam_descr *d;
2244
2245         if (o->oo_dir != NULL)
2246                 d = o->oo_dir->od_container.ic_descr;
2247         else
2248                 d = NULL;
2249         return (*p)(env, cookie,
2250                     LUSTRE_OSD_LDISKFS_NAME"-object@%p(i:%p:%lu/%u)[%s]",
2251                     o, o->oo_inode,
2252                     o->oo_inode ? o->oo_inode->i_ino : 0UL,
2253                     o->oo_inode ? o->oo_inode->i_generation : 0,
2254                     d ? d->id_ops->id_name : "plain");
2255 }
2256
2257 /*
2258  * Concurrency: shouldn't matter.
2259  */
2260 int osd_statfs(const struct lu_env *env, struct dt_device *d,
2261                 struct obd_statfs *sfs, struct obd_statfs_info *info)
2262 {
2263         struct osd_device *osd = osd_dt_dev(d);
2264         struct super_block *sb = osd_sb(osd);
2265         struct kstatfs *ksfs;
2266         __u64 reserved;
2267         int result = 0;
2268
2269         if (unlikely(osd->od_mnt == NULL))
2270                 return -EINPROGRESS;
2271
2272         /* osd_lproc.c call this without env, allocate ksfs for that case */
2273         if (unlikely(env == NULL)) {
2274                 OBD_ALLOC_PTR(ksfs);
2275                 if (ksfs == NULL)
2276                         return -ENOMEM;
2277         } else {
2278                 ksfs = &osd_oti_get(env)->oti_ksfs;
2279         }
2280
2281         result = sb->s_op->statfs(sb->s_root, ksfs);
2282         if (result)
2283                 goto out;
2284
2285         statfs_pack(sfs, ksfs);
2286         if (unlikely(sb->s_flags & SB_RDONLY))
2287                 sfs->os_state |= OS_STATFS_READONLY;
2288
2289         sfs->os_state |= osd->od_nonrotational ? OS_STATFS_NONROT : 0;
2290
2291         if (ldiskfs_has_feature_extents(sb))
2292                 sfs->os_maxbytes = sb->s_maxbytes;
2293         else
2294                 sfs->os_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2295
2296         /*
2297          * Reserve some space so to avoid fragmenting the filesystem too much.
2298          * Fragmentation not only impacts performance, but can also increase
2299          * metadata overhead significantly, causing grant calculation to be
2300          * wrong.
2301          *
2302          * Reserve 0.78% of total space, at least 8MB for small filesystems.
2303          */
2304         BUILD_BUG_ON(OSD_STATFS_RESERVED <= LDISKFS_MAX_BLOCK_SIZE);
2305         reserved = OSD_STATFS_RESERVED >> sb->s_blocksize_bits;
2306         if (likely(sfs->os_blocks >= reserved << OSD_STATFS_RESERVED_SHIFT))
2307                 reserved = sfs->os_blocks >> OSD_STATFS_RESERVED_SHIFT;
2308
2309         sfs->os_blocks -= reserved;
2310         sfs->os_bfree  -= min(reserved, sfs->os_bfree);
2311         sfs->os_bavail -= min(reserved, sfs->os_bavail);
2312
2313 out:
2314         if (unlikely(env == NULL))
2315                 OBD_FREE_PTR(ksfs);
2316         return result;
2317 }
2318
2319 /**
2320  * Estimate space needed for file creations. We assume the largest filename
2321  * which is 2^64 - 1, hence a filename of 20 chars.
2322  * This is 28 bytes per object which is 28MB for 1M objects ... no so bad.
2323  */
2324 #ifdef __LDISKFS_DIR_REC_LEN
2325 #define PER_OBJ_USAGE __LDISKFS_DIR_REC_LEN(20)
2326 #else
2327 #define PER_OBJ_USAGE LDISKFS_DIR_REC_LEN(20)
2328 #endif
2329
2330 /*
2331  * Concurrency: doesn't access mutable data.
2332  */
2333 static void osd_conf_get(const struct lu_env *env,
2334                          const struct dt_device *dev,
2335                          struct dt_device_param *param)
2336 {
2337         struct osd_device *d = osd_dt_dev(dev);
2338         struct super_block *sb = osd_sb(d);
2339         struct blk_integrity *bi = bdev_get_integrity(sb->s_bdev);
2340         const char *name;
2341         int ea_overhead;
2342
2343         /*
2344          * XXX should be taken from not-yet-existing fs abstraction layer.
2345          */
2346         param->ddp_max_name_len = LDISKFS_NAME_LEN;
2347         param->ddp_max_nlink    = LDISKFS_LINK_MAX;
2348         param->ddp_symlink_max  = sb->s_blocksize;
2349         param->ddp_mount_type   = LDD_MT_LDISKFS;
2350         if (ldiskfs_has_feature_extents(sb))
2351                 param->ddp_maxbytes = sb->s_maxbytes;
2352         else
2353                 param->ddp_maxbytes = LDISKFS_SB(sb)->s_bitmap_maxbytes;
2354         /*
2355          * inode are statically allocated, so per-inode space consumption
2356          * is the space consumed by the directory entry
2357          */
2358         param->ddp_inodespace     = PER_OBJ_USAGE;
2359         /*
2360          * EXT_INIT_MAX_LEN is the theoretical maximum extent size (32k blocks
2361          * is 128MB) which is unlikely to be hit in real life. Report a smaller
2362          * maximum length to not under-count the actual number of extents
2363          * needed for writing a file if there are sub-optimal block allocations.
2364          */
2365         param->ddp_max_extent_blks = EXT_INIT_MAX_LEN >> 1;
2366         /* worst-case extent insertion metadata overhead */
2367         param->ddp_extent_tax = 6 * LDISKFS_BLOCK_SIZE(sb);
2368         param->ddp_mntopts = 0;
2369         if (test_opt(sb, XATTR_USER))
2370                 param->ddp_mntopts |= MNTOPT_USERXATTR;
2371         if (test_opt(sb, POSIX_ACL))
2372                 param->ddp_mntopts |= MNTOPT_ACL;
2373
2374         /*
2375          * LOD might calculate the max stripe count based on max_ea_size,
2376          * so we need take account in the overhead as well,
2377          * xattr_header + magic + xattr_entry_head
2378          */
2379         ea_overhead = sizeof(struct ldiskfs_xattr_header) + sizeof(__u32) +
2380                       LDISKFS_XATTR_LEN(XATTR_NAME_MAX_LEN);
2381
2382 #if defined(LDISKFS_FEATURE_INCOMPAT_EA_INODE)
2383         if (ldiskfs_has_feature_ea_inode(sb))
2384                 param->ddp_max_ea_size = LDISKFS_XATTR_MAX_LARGE_EA_SIZE -
2385                                                                 ea_overhead;
2386         else
2387 #endif
2388                 param->ddp_max_ea_size = sb->s_blocksize - ea_overhead;
2389
2390         if (param->ddp_max_ea_size > OBD_MAX_EA_SIZE)
2391                 param->ddp_max_ea_size = OBD_MAX_EA_SIZE;
2392
2393         /*
2394          * Preferred RPC size for efficient disk IO.  4MB shows good
2395          * all-around performance for ldiskfs, but use bigalloc chunk size
2396          * by default if larger.
2397          */
2398 #if defined(LDISKFS_CLUSTER_SIZE)
2399         if (LDISKFS_CLUSTER_SIZE(sb) > DT_DEF_BRW_SIZE)
2400                 param->ddp_brw_size = LDISKFS_CLUSTER_SIZE(sb);
2401         else
2402 #endif
2403                 param->ddp_brw_size = DT_DEF_BRW_SIZE;
2404
2405         param->ddp_t10_cksum_type = 0;
2406         if (bi) {
2407                 unsigned short interval = blk_integrity_interval(bi);
2408                 name = blk_integrity_name(bi);
2409                 /*
2410                  * Expected values:
2411                  * T10-DIF-TYPE1-CRC
2412                  * T10-DIF-TYPE3-CRC
2413                  * T10-DIF-TYPE1-IP
2414                  * T10-DIF-TYPE3-IP
2415                  */
2416                 if (strncmp(name, "T10-DIF-TYPE",
2417                             sizeof("T10-DIF-TYPE") - 1) == 0) {
2418                         /* also skip "1/3-" at end */
2419                         const int type_off = sizeof("T10-DIF-TYPE.");
2420                         char type_number = name[type_off - 2];
2421
2422                         if (interval != 512 && interval != 4096) {
2423                                 CERROR("%s: unsupported T10PI sector size %u\n",
2424                                        d->od_svname, interval);
2425                         } else if (type_number != '1' && type_number != '3') {
2426                                 CERROR("%s: unsupported T10PI type %s\n",
2427                                        d->od_svname, name);
2428                         } else if (strcmp(name + type_off, "CRC") == 0) {
2429                                 d->od_t10_type = type_number == '1' ?
2430                                         OSD_T10_TYPE1_CRC : OSD_T10_TYPE3_CRC;
2431                                 param->ddp_t10_cksum_type = interval == 512 ?
2432                                         OBD_CKSUM_T10CRC512 :
2433                                         OBD_CKSUM_T10CRC4K;
2434                         } else if (strcmp(name + type_off, "IP") == 0) {
2435                                 d->od_t10_type = type_number == '1' ?
2436                                         OSD_T10_TYPE1_IP : OSD_T10_TYPE3_IP;
2437                                 param->ddp_t10_cksum_type = interval == 512 ?
2438                                         OBD_CKSUM_T10IP512 :
2439                                         OBD_CKSUM_T10IP4K;
2440                         } else {
2441                                 CERROR("%s: unsupported checksum type of T10PI type '%s'\n",
2442                                        d->od_svname, name);
2443                         }
2444
2445                 } else {
2446                         CERROR("%s: unsupported T10PI type '%s'\n",
2447                                d->od_svname, name);
2448                 }
2449         }
2450
2451         param->ddp_has_lseek_data_hole = true;
2452 }
2453
2454 static struct super_block *osd_mnt_sb_get(const struct dt_device *d)
2455 {
2456         return osd_sb(osd_dt_dev(d));
2457 }
2458
2459 /*
2460  * Concurrency: shouldn't matter.
2461  */
2462 static int osd_sync(const struct lu_env *env, struct dt_device *d)
2463 {
2464         int rc;
2465         struct super_block *s = osd_sb(osd_dt_dev(d));
2466         ENTRY;
2467
2468         down_read(&s->s_umount);
2469         rc = s->s_op->sync_fs(s, 1);
2470         up_read(&s->s_umount);
2471
2472         CDEBUG(D_CACHE, "%s: synced OSD: rc = %d\n", osd_dt_dev(d)->od_svname,
2473                rc);
2474
2475         return rc;
2476 }
2477
2478 /**
2479  * Start commit for OSD device.
2480  *
2481  * An implementation of dt_commit_async method for OSD device.
2482  * Asychronously starts underlayng fs sync and thereby a transaction
2483  * commit.
2484  *
2485  * \param env environment
2486  * \param d dt device
2487  *
2488  * \see dt_device_operations
2489  */
2490 static int osd_commit_async(const struct lu_env *env,
2491                             struct dt_device *d)
2492 {
2493         struct super_block *s = osd_sb(osd_dt_dev(d));
2494         int rc;
2495
2496         ENTRY;
2497
2498         CDEBUG(D_HA, "%s: async commit OSD\n", osd_dt_dev(d)->od_svname);
2499         down_read(&s->s_umount);
2500         rc = s->s_op->sync_fs(s, 0);
2501         up_read(&s->s_umount);
2502
2503         RETURN(rc);
2504 }
2505
2506 /*
2507  * Concurrency: shouldn't matter.
2508  */
2509 static int osd_ro(const struct lu_env *env, struct dt_device *d)
2510 {
2511         struct super_block *sb = osd_sb(osd_dt_dev(d));
2512         struct block_device *dev = sb->s_bdev;
2513         int rc = -EOPNOTSUPP;
2514
2515         ENTRY;
2516
2517         CERROR("%s: %lx CANNOT BE SET READONLY: rc = %d\n",
2518                osd_dt_dev(d)->od_svname, (long)dev, rc);
2519
2520         RETURN(rc);
2521 }
2522
2523 /**
2524  * Note: we do not count into QUOTA here.
2525  * If we mount with --data_journal we may need more.
2526  */
2527 const int osd_dto_credits_noquota[DTO_NR] = {
2528         /**
2529          * Insert.
2530          * INDEX_EXTRA_TRANS_BLOCKS(8) +
2531          * SINGLEDATA_TRANS_BLOCKS(8)
2532          * XXX Note: maybe iam need more, since iam have more level than
2533          *           EXT3 htree.
2534          */
2535         [DTO_INDEX_INSERT]  = 16,
2536         /**
2537          * Delete
2538          * just modify a single entry, probably merge few within a block
2539          */
2540         [DTO_INDEX_DELETE]  = 1,
2541         /**
2542          * Used for OI scrub
2543          */
2544         [DTO_INDEX_UPDATE]  = 16,
2545         /**
2546          * 4(inode, inode bits, groups, GDT)
2547          *   notice: OI updates are counted separately with DTO_INDEX_INSERT
2548          */
2549         [DTO_OBJECT_CREATE] = 4,
2550         /**
2551          * 4(inode, inode bits, groups, GDT)
2552          *   notice: OI updates are counted separately with DTO_INDEX_DELETE
2553          */
2554         [DTO_OBJECT_DELETE] = 4,
2555         /**
2556          * Attr set credits (inode)
2557          */
2558         [DTO_ATTR_SET_BASE] = 1,
2559         /**
2560          * Xattr set. The same as xattr of EXT3.
2561          * DATA_TRANS_BLOCKS(14)
2562          * XXX Note: in original MDS implmentation INDEX_EXTRA_TRANS_BLOCKS
2563          * are also counted in. Do not know why?
2564          */
2565         [DTO_XATTR_SET]     = 14,
2566         /**
2567          * credits for inode change during write.
2568          */
2569         [DTO_WRITE_BASE]    = 3,
2570         /**
2571          * credits for single block write.
2572          */
2573         [DTO_WRITE_BLOCK]   = 14,
2574         /**
2575          * Attr set credits for chown.
2576          * This is extra credits for setattr, and it is null without quota
2577          */
2578         [DTO_ATTR_SET_CHOWN] = 0
2579 };
2580
2581 /* reserve or free quota for some operation */
2582 static int osd_reserve_or_free_quota(const struct lu_env *env,
2583                                      struct dt_device *dev,
2584                                      enum quota_type type, __u64 uid,
2585                                      __u64 gid, __s64 count, bool is_md)
2586 {
2587         int rc;
2588         struct osd_device       *osd = osd_dt_dev(dev);
2589         struct osd_thread_info  *info = osd_oti_get(env);
2590         struct lquota_id_info   *qi = &info->oti_qi;
2591         struct qsd_instance     *qsd = NULL;
2592
2593         ENTRY;
2594
2595         if (is_md)
2596                 qsd = osd->od_quota_slave_md;
2597         else
2598                 qsd = osd->od_quota_slave_dt;
2599
2600         rc = quota_reserve_or_free(env, qsd, qi, type, uid, gid, count, is_md);
2601         RETURN(rc);
2602 }
2603
2604 static const struct dt_device_operations osd_dt_ops = {
2605         .dt_root_get              = osd_root_get,
2606         .dt_statfs                = osd_statfs,
2607         .dt_trans_create          = osd_trans_create,
2608         .dt_trans_start           = osd_trans_start,
2609         .dt_trans_stop            = osd_trans_stop,
2610         .dt_trans_cb_add          = osd_trans_cb_add,
2611         .dt_conf_get              = osd_conf_get,
2612         .dt_mnt_sb_get            = osd_mnt_sb_get,
2613         .dt_sync                  = osd_sync,
2614         .dt_ro                    = osd_ro,
2615         .dt_commit_async          = osd_commit_async,
2616         .dt_reserve_or_free_quota = osd_reserve_or_free_quota,
2617 };
2618
2619 static void osd_read_lock(const struct lu_env *env, struct dt_object *dt,
2620                           unsigned int role)
2621 {
2622         struct osd_object *obj = osd_dt_obj(dt);
2623         struct osd_thread_info *oti = osd_oti_get(env);
2624
2625         LINVRNT(osd_invariant(obj));
2626
2627         LASSERT(obj->oo_owner != env);
2628         down_read_nested(&obj->oo_sem, role);
2629
2630         LASSERT(obj->oo_owner == NULL);
2631         oti->oti_r_locks++;
2632 }
2633
2634 static void osd_write_lock(const struct lu_env *env, struct dt_object *dt,
2635                            unsigned int role)
2636 {
2637         struct osd_object *obj = osd_dt_obj(dt);
2638         struct osd_thread_info *oti = osd_oti_get(env);
2639
2640         LINVRNT(osd_invariant(obj));
2641
2642         LASSERT(obj->oo_owner != env);
2643         down_write_nested(&obj->oo_sem, role);
2644
2645         LASSERT(obj->oo_owner == NULL);
2646         obj->oo_owner = env;
2647         oti->oti_w_locks++;
2648 }
2649
2650 static void osd_read_unlock(const struct lu_env *env, struct dt_object *dt)
2651 {
2652         struct osd_object *obj = osd_dt_obj(dt);
2653         struct osd_thread_info *oti = osd_oti_get(env);
2654
2655         LINVRNT(osd_invariant(obj));
2656
2657         LASSERT(oti->oti_r_locks > 0);
2658         oti->oti_r_locks--;
2659         up_read(&obj->oo_sem);
2660 }
2661
2662 static void osd_write_unlock(const struct lu_env *env, struct dt_object *dt)
2663 {
2664         struct osd_object *obj = osd_dt_obj(dt);
2665         struct osd_thread_info *oti = osd_oti_get(env);
2666
2667         LINVRNT(osd_invariant(obj));
2668
2669         LASSERT(obj->oo_owner == env);
2670         LASSERT(oti->oti_w_locks > 0);
2671         oti->oti_w_locks--;
2672         obj->oo_owner = NULL;
2673         up_write(&obj->oo_sem);
2674 }
2675
2676 static int osd_write_locked(const struct lu_env *env, struct dt_object *dt)
2677 {
2678         struct osd_object *obj = osd_dt_obj(dt);
2679
2680         LINVRNT(osd_invariant(obj));
2681
2682         return obj->oo_owner == env;
2683 }
2684
2685 static void osd_inode_getattr(const struct lu_env *env,
2686                               struct inode *inode, struct lu_attr *attr)
2687 {
2688         attr->la_valid  |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE |
2689                            LA_SIZE | LA_BLOCKS | LA_UID | LA_GID |
2690                            LA_PROJID | LA_FLAGS | LA_NLINK | LA_RDEV |
2691                            LA_BLKSIZE | LA_TYPE | LA_BTIME;
2692
2693         attr->la_atime = inode->i_atime.tv_sec;
2694         attr->la_mtime = inode->i_mtime.tv_sec;
2695         attr->la_ctime = inode->i_ctime.tv_sec;
2696         attr->la_btime = LDISKFS_I(inode)->i_crtime.tv_sec;
2697         attr->la_mode    = inode->i_mode;
2698         attr->la_size    = i_size_read(inode);
2699         attr->la_blocks  = inode->i_blocks;
2700         attr->la_uid     = i_uid_read(inode);
2701         attr->la_gid     = i_gid_read(inode);
2702         attr->la_projid  = i_projid_read(inode);
2703         attr->la_flags   = ll_inode_to_ext_flags(inode->i_flags);
2704         attr->la_nlink   = inode->i_nlink;
2705         attr->la_rdev    = inode->i_rdev;
2706         attr->la_blksize = 1 << inode->i_blkbits;
2707         attr->la_blkbits = inode->i_blkbits;
2708         /*
2709          * Ext4 did not transfer inherit flags from raw inode
2710          * to inode flags, and ext4 internally test raw inode
2711          * @i_flags directly. Instead of patching ext4, we do it here.
2712          */
2713         if (LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL)
2714                 attr->la_flags |= LUSTRE_PROJINHERIT_FL;
2715 }
2716
2717 static int osd_dirent_count(const struct lu_env *env, struct dt_object *dt,
2718                             u64 *count)
2719 {
2720         struct osd_object *obj = osd_dt_obj(dt);
2721         const struct dt_it_ops *iops;
2722         struct dt_it *it;
2723         int rc;
2724
2725         ENTRY;
2726
2727         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
2728         LASSERT(fid_is_namespace_visible(lu_object_fid(&obj->oo_dt.do_lu)));
2729
2730         if (obj->oo_dirent_count != LU_DIRENT_COUNT_UNSET) {
2731                 *count = obj->oo_dirent_count;
2732                 RETURN(0);
2733         }
2734
2735         /* directory not initialized yet */
2736         if (!dt->do_index_ops) {
2737                 *count = 0;
2738                 RETURN(0);
2739         }
2740
2741         iops = &dt->do_index_ops->dio_it;
2742         it = iops->init(env, dt, LUDA_64BITHASH);
2743         if (IS_ERR(it))
2744                 RETURN(PTR_ERR(it));
2745
2746         rc = iops->load(env, it, 0);
2747         if (rc < 0) {
2748                 if (rc == -ENODATA) {
2749                         rc = 0;
2750                         *count = 0;
2751                 }
2752                 GOTO(out, rc);
2753         }
2754         if (rc > 0)
2755                 rc = iops->next(env, it);
2756
2757         for (*count = 0; rc == 0 || rc == -ESTALE; rc = iops->next(env, it)) {
2758                 if (rc == -ESTALE)
2759                         continue;
2760
2761                 if (iops->key_size(env, it) == 0)
2762                         continue;
2763
2764                 (*count)++;
2765         }
2766         if (rc == 1) {
2767                 obj->oo_dirent_count = *count;
2768                 rc = 0;
2769         }
2770 out:
2771         iops->put(env, it);
2772         iops->fini(env, it);
2773
2774         RETURN(rc);
2775 }
2776
2777 static int osd_attr_get(const struct lu_env *env, struct dt_object *dt,
2778                         struct lu_attr *attr)
2779 {
2780         struct osd_object *obj = osd_dt_obj(dt);
2781         int rc = 0;
2782
2783         if (unlikely(!dt_object_exists(dt)))
2784                 return -ENOENT;
2785         if (unlikely(obj->oo_destroyed))
2786                 return -ENOENT;
2787
2788         LASSERT(!dt_object_remote(dt));
2789         LINVRNT(osd_invariant(obj));
2790
2791         spin_lock(&obj->oo_guard);
2792         osd_inode_getattr(env, obj->oo_inode, attr);
2793         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL) {
2794                 attr->la_valid |= LA_FLAGS;
2795                 attr->la_flags |= LUSTRE_ORPHAN_FL;
2796         }
2797         if (obj->oo_lma_flags & LUSTRE_ENCRYPT_FL) {
2798                 attr->la_valid |= LA_FLAGS;
2799                 attr->la_flags |= LUSTRE_ENCRYPT_FL;
2800         }
2801         spin_unlock(&obj->oo_guard);
2802
2803         if (S_ISDIR(obj->oo_inode->i_mode) &&
2804             fid_is_namespace_visible(lu_object_fid(&dt->do_lu)))
2805                 rc = osd_dirent_count(env, dt, &attr->la_dirent_count);
2806
2807         return rc;
2808 }
2809
2810 static int osd_declare_attr_qid(const struct lu_env *env,
2811                                 struct osd_object *obj,
2812                                 struct osd_thandle *oh, long long bspace,
2813                                 qid_t old_id, qid_t new_id, bool enforce,
2814                                 unsigned int type)
2815 {
2816         int rc;
2817         struct osd_thread_info *info = osd_oti_get(env);
2818         struct lquota_id_info  *qi = &info->oti_qi;
2819
2820         qi->lqi_type = type;
2821         /* inode accounting */
2822         qi->lqi_is_blk = false;
2823
2824         /* one more inode for the new id ... */
2825         qi->lqi_id.qid_uid = new_id;
2826         qi->lqi_space      = 1;
2827         /* Reserve credits for the new id */
2828         rc = osd_declare_qid(env, oh, qi, NULL, enforce, NULL);
2829         if (rc == -EDQUOT || rc == -EINPROGRESS)
2830                 rc = 0;
2831         if (rc)
2832                 RETURN(rc);
2833
2834         /* and one less inode for the current id */
2835         qi->lqi_id.qid_uid = old_id;
2836         qi->lqi_space = -1;
2837         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2838         if (rc == -EDQUOT || rc == -EINPROGRESS)
2839                 rc = 0;
2840         if (rc)
2841                 RETURN(rc);
2842
2843         /* block accounting */
2844         qi->lqi_is_blk = true;
2845
2846         /* more blocks for the new id ... */
2847         qi->lqi_id.qid_uid = new_id;
2848         qi->lqi_space      = bspace;
2849         /*
2850          * Credits for the new uid has been reserved, re-use "obj"
2851          * to save credit reservation.
2852          */
2853         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2854         if (rc == -EDQUOT || rc == -EINPROGRESS)
2855                 rc = 0;
2856         if (rc)
2857                 RETURN(rc);
2858
2859         /* and finally less blocks for the current uid */
2860         qi->lqi_id.qid_uid = old_id;
2861         qi->lqi_space      = -bspace;
2862         rc = osd_declare_qid(env, oh, qi, obj, enforce, NULL);
2863         if (rc == -EDQUOT || rc == -EINPROGRESS)
2864                 rc = 0;
2865
2866         RETURN(rc);
2867 }
2868
2869 static int osd_declare_attr_set(const struct lu_env *env,
2870                                 struct dt_object *dt,
2871                                 const struct lu_attr *attr,
2872                                 struct thandle *handle)
2873 {
2874         struct osd_thandle *oh;
2875         struct osd_object *obj;
2876         qid_t uid;
2877         qid_t gid;
2878         long long bspace;
2879         int rc = 0;
2880         bool enforce;
2881
2882         ENTRY;
2883
2884         LASSERT(dt != NULL);
2885         LASSERT(handle != NULL);
2886
2887         obj = osd_dt_obj(dt);
2888         LASSERT(osd_invariant(obj));
2889
2890         oh = container_of(handle, struct osd_thandle, ot_super);
2891         LASSERT(oh->ot_handle == NULL);
2892
2893         osd_trans_declare_op(env, oh, OSD_OT_ATTR_SET,
2894                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
2895
2896         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
2897                              osd_dto_credits_noquota[DTO_XATTR_SET]);
2898
2899         if (attr == NULL || obj->oo_inode == NULL)
2900                 RETURN(rc);
2901
2902         bspace   = obj->oo_inode->i_blocks << 9;
2903         bspace   = toqb(bspace);
2904
2905         /*
2906          * Changing ownership is always preformed by super user, it should not
2907          * fail with EDQUOT unless required explicitly.
2908          *
2909          * We still need to call the osd_declare_qid() to calculate the journal
2910          * credits for updating quota accounting files and to trigger quota
2911          * space adjustment once the operation is completed.
2912          */
2913         if (attr->la_valid & LA_UID || attr->la_valid & LA_GID) {
2914                 /* USERQUOTA */
2915                 uid = i_uid_read(obj->oo_inode);
2916                 enforce = (attr->la_valid & LA_UID) && (attr->la_uid != uid);
2917                 rc = osd_declare_attr_qid(env, obj, oh, bspace, uid,
2918                                           attr->la_uid, enforce, USRQUOTA);
2919                 if (rc)
2920                         RETURN(rc);
2921
2922                 gid = i_gid_read(obj->oo_inode);
2923                 CDEBUG(D_QUOTA, "declare uid %d -> %d gid %d -> %d\n", uid,
2924                        attr->la_uid, gid, attr->la_gid);
2925                 enforce = (attr->la_valid & LA_GID) && (attr->la_gid != gid);
2926                 rc = osd_declare_attr_qid(env, obj, oh, bspace, gid,
2927                                           attr->la_gid, enforce, GRPQUOTA);
2928                 if (rc)
2929                         RETURN(rc);
2930
2931         }
2932 #ifdef HAVE_PROJECT_QUOTA
2933         if (attr->la_valid & LA_PROJID) {
2934                 __u32 projid = i_projid_read(obj->oo_inode);
2935
2936                 enforce = (attr->la_valid & LA_PROJID) &&
2937                                         (attr->la_projid != projid);
2938                 rc = osd_declare_attr_qid(env, obj, oh, bspace,
2939                                           (qid_t)projid, (qid_t)attr->la_projid,
2940                                           enforce, PRJQUOTA);
2941                 if (rc)
2942                         RETURN(rc);
2943         }
2944 #endif
2945         RETURN(rc);
2946 }
2947
2948 static int osd_inode_setattr(const struct lu_env *env,
2949                              struct inode *inode, const struct lu_attr *attr)
2950 {
2951         __u64 bits = attr->la_valid;
2952
2953         /* Only allow set size for regular file */
2954         if (!S_ISREG(inode->i_mode))
2955                 bits &= ~(LA_SIZE | LA_BLOCKS);
2956
2957         if (bits == 0)
2958                 return 0;
2959
2960         if (bits & LA_ATIME)
2961                 inode->i_atime = osd_inode_time(inode, attr->la_atime);
2962         if (bits & LA_CTIME)
2963                 inode->i_ctime = osd_inode_time(inode, attr->la_ctime);
2964         if (bits & LA_MTIME)
2965                 inode->i_mtime = osd_inode_time(inode, attr->la_mtime);
2966         if (bits & LA_SIZE) {
2967                 spin_lock(&inode->i_lock);
2968                 LDISKFS_I(inode)->i_disksize = attr->la_size;
2969                 i_size_write(inode, attr->la_size);
2970                 spin_unlock(&inode->i_lock);
2971         }
2972
2973         /*
2974          * OSD should not change "i_blocks" which is used by quota.
2975          * "i_blocks" should be changed by ldiskfs only.
2976          */
2977         if (bits & LA_MODE)
2978                 inode->i_mode = (inode->i_mode & S_IFMT) |
2979                                 (attr->la_mode & ~S_IFMT);
2980         if (bits & LA_UID)
2981                 i_uid_write(inode, attr->la_uid);
2982         if (bits & LA_GID)
2983                 i_gid_write(inode, attr->la_gid);
2984         if (bits & LA_PROJID)
2985                 i_projid_write(inode, attr->la_projid);
2986         if (bits & LA_NLINK)
2987                 set_nlink(inode, attr->la_nlink);
2988         if (bits & LA_RDEV)
2989                 inode->i_rdev = attr->la_rdev;
2990
2991         if (bits & LA_FLAGS) {
2992                 /* always keep S_NOCMTIME */
2993                 inode->i_flags = ll_ext_to_inode_flags(attr->la_flags) |
2994                                  S_NOCMTIME;
2995 #if defined(S_ENCRYPTED)
2996                 /* Always remove S_ENCRYPTED, because ldiskfs must not be
2997                  * aware of encryption status. It is just stored into LMA
2998                  * so that it can be forwared to client side.
2999                  */
3000                 inode->i_flags &= ~S_ENCRYPTED;
3001 #endif
3002                 /*
3003                  * Ext4 did not transfer inherit flags from
3004                  * @inode->i_flags to raw inode i_flags when writing
3005                  * flags, we do it explictly here.
3006                  */
3007                 if (attr->la_flags & LUSTRE_PROJINHERIT_FL)
3008                         LDISKFS_I(inode)->i_flags |= LUSTRE_PROJINHERIT_FL;
3009                 else
3010                         LDISKFS_I(inode)->i_flags &= ~LUSTRE_PROJINHERIT_FL;
3011         }
3012         return 0;
3013 }
3014
3015 #ifdef HAVE_PROJECT_QUOTA
3016 static int osd_transfer_project(struct inode *inode, __u32 projid,
3017                                 struct thandle *handle)
3018 {
3019         struct super_block *sb = inode->i_sb;
3020         struct ldiskfs_inode_info *ei = LDISKFS_I(inode);
3021         int err;
3022         kprojid_t kprojid;
3023         struct ldiskfs_iloc iloc;
3024         struct ldiskfs_inode *raw_inode;
3025         struct dquot *transfer_to[LDISKFS_MAXQUOTAS] = { };
3026
3027         if (!ldiskfs_has_feature_project(sb)) {
3028                 LASSERT(__kprojid_val(LDISKFS_I(inode)->i_projid)
3029                         == LDISKFS_DEF_PROJID);
3030                 if (projid != LDISKFS_DEF_PROJID)
3031                         return -EOPNOTSUPP;
3032                 else
3033                         return 0;
3034         }
3035
3036         if (LDISKFS_INODE_SIZE(sb) <= LDISKFS_GOOD_OLD_INODE_SIZE)
3037                 return -EOPNOTSUPP;
3038
3039         kprojid = make_kprojid(&init_user_ns, (projid_t)projid);
3040         if (projid_eq(kprojid, LDISKFS_I(inode)->i_projid))
3041                 return 0;
3042
3043         err = ldiskfs_get_inode_loc(inode, &iloc);
3044         if (err)
3045                 return err;
3046
3047         raw_inode = ldiskfs_raw_inode(&iloc);
3048         if (!LDISKFS_FITS_IN_INODE(raw_inode, ei, i_projid)) {
3049                 struct osd_thandle *oh = container_of(handle,
3050                                                       struct osd_thandle,
3051                                                       ot_super);
3052                 /**
3053                  * try to expand inode size automatically.
3054                  */
3055                 ldiskfs_mark_inode_dirty(oh->ot_handle, inode);
3056                 if (!LDISKFS_FITS_IN_INODE(raw_inode, ei, i_projid)) {
3057                         err = -EOVERFLOW;
3058                         brelse(iloc.bh);
3059                         return err;
3060                 }
3061         }
3062         brelse(iloc.bh);
3063
3064         dquot_initialize(inode);
3065         transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid));
3066         if (transfer_to[PRJQUOTA]) {
3067                 lock_dquot_transfer(inode);
3068                 err = __dquot_transfer(inode, transfer_to);
3069                 unlock_dquot_transfer(inode);
3070                 dqput(transfer_to[PRJQUOTA]);
3071                 if (err)
3072                         return err;
3073         }
3074
3075         return err;
3076 }
3077 #endif
3078
3079 static int osd_quota_transfer(struct inode *inode, const struct lu_attr *attr,
3080                               struct thandle *handle)
3081 {
3082         int rc;
3083
3084         if ((attr->la_valid & LA_UID && attr->la_uid != i_uid_read(inode)) ||
3085             (attr->la_valid & LA_GID && attr->la_gid != i_gid_read(inode))) {
3086                 struct iattr iattr;
3087
3088                 CDEBUG(D_QUOTA,
3089                        "executing dquot_transfer inode %ld uid %d -> %d gid %d -> %d\n",
3090                        inode->i_ino, i_uid_read(inode), attr->la_uid,
3091                        i_gid_read(inode), attr->la_gid);
3092
3093                 dquot_initialize(inode);
3094                 iattr.ia_valid = 0;
3095                 if (attr->la_valid & LA_UID)
3096                         iattr.ia_valid |= ATTR_UID;
3097                 if (attr->la_valid & LA_GID)
3098                         iattr.ia_valid |= ATTR_GID;
3099                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
3100                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
3101
3102                 lock_dquot_transfer(inode);
3103                 rc = dquot_transfer(inode, &iattr);
3104                 unlock_dquot_transfer(inode);
3105                 if (rc) {
3106                         CERROR("%s: quota transfer failed. Is quota enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3107                                osd_ino2name(inode), rc);
3108                         return rc;
3109                 }
3110         }
3111
3112         /* Handle project id transfer here properly */
3113         if (attr->la_valid & LA_PROJID &&
3114             attr->la_projid != i_projid_read(inode)) {
3115                 if (!projid_valid(make_kprojid(&init_user_ns, attr->la_projid)))
3116                         return -EINVAL;
3117 #ifdef HAVE_PROJECT_QUOTA
3118                 rc = osd_transfer_project(inode, attr->la_projid, handle);
3119 #else
3120                 rc = -ENOTSUPP;
3121 #endif
3122                 if (rc) {
3123                         CERROR("%s: quota transfer failed. Is project enforcement enabled on the ldiskfs filesystem? rc = %d\n",
3124                                osd_ino2name(inode), rc);
3125                         return rc;
3126                 }
3127         }
3128         return 0;
3129 }
3130
3131 static int osd_attr_set(const struct lu_env *env,
3132                         struct dt_object *dt,
3133                         const struct lu_attr *attr,
3134                         struct thandle *handle)
3135 {
3136         struct osd_object *obj = osd_dt_obj(dt);
3137         struct inode *inode;
3138         int rc;
3139
3140         if (!dt_object_exists(dt))
3141                 return -ENOENT;
3142
3143         LASSERT(handle != NULL);
3144         LASSERT(!dt_object_remote(dt));
3145         LASSERT(osd_invariant(obj));
3146
3147         osd_trans_exec_op(env, handle, OSD_OT_ATTR_SET);
3148
3149         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_FID_MAPPING) &&
3150             !osd_obj2dev(obj)->od_is_ost) {
3151                 struct osd_thread_info *oti = osd_oti_get(env);
3152                 const struct lu_fid *fid0 = lu_object_fid(&dt->do_lu);
3153                 struct lu_fid *fid1 = &oti->oti_fid;
3154                 struct osd_inode_id *id = &oti->oti_id;
3155                 struct iam_path_descr *ipd;
3156                 struct iam_container *bag;
3157                 struct osd_thandle *oh;
3158                 int rc;
3159
3160                 fid_cpu_to_be(fid1, fid0);
3161                 memset(id, 1, sizeof(*id));
3162                 bag = &osd_fid2oi(osd_dev(dt->do_lu.lo_dev),
3163                                   fid0)->oi_dir.od_container;
3164                 ipd = osd_idx_ipd_get(env, bag);
3165                 if (unlikely(ipd == NULL))
3166                         RETURN(-ENOMEM);
3167
3168                 oh = container_of(handle, struct osd_thandle, ot_super);
3169                 rc = iam_update(oh->ot_handle, bag,
3170                                 (const struct iam_key *)fid1,
3171                                 (const struct iam_rec *)id, ipd);
3172                 osd_ipd_put(env, bag, ipd);
3173                 return(rc > 0 ? 0 : rc);
3174         }
3175
3176         inode = obj->oo_inode;
3177
3178         rc = osd_quota_transfer(inode, attr, handle);
3179         if (rc)
3180                 return rc;
3181
3182         spin_lock(&obj->oo_guard);
3183         rc = osd_inode_setattr(env, inode, attr);
3184         spin_unlock(&obj->oo_guard);
3185         if (rc != 0)
3186                 GOTO(out, rc);
3187
3188         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3189
3190         osd_trans_exec_check(env, handle, OSD_OT_ATTR_SET);
3191
3192         if (!(attr->la_valid & LA_FLAGS))
3193                 GOTO(out, rc);
3194
3195         /* Let's check if there are extra flags need to be set into LMA */
3196         if (attr->la_flags & LUSTRE_LMA_FL_MASKS) {
3197                 struct osd_thread_info *info = osd_oti_get(env);
3198                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
3199
3200                 LASSERT(!obj->oo_pfid_in_lma);
3201
3202                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
3203                                  &info->oti_ost_attrs);
3204                 if (rc)
3205                         GOTO(out, rc);
3206
3207                 lma->lma_incompat |=
3208                         lustre_to_lma_flags(attr->la_flags);
3209                 lustre_lma_swab(lma);
3210
3211                 osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
3212
3213                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA,
3214                                      lma, sizeof(*lma), XATTR_REPLACE);
3215                 if (rc != 0) {
3216                         struct osd_device *osd = osd_obj2dev(obj);
3217
3218                         CWARN("%s: set "DFID" lma flags %u failed: rc = %d\n",
3219                               osd_name(osd), PFID(lu_object_fid(&dt->do_lu)),
3220                               lma->lma_incompat, rc);
3221                 } else {
3222                         obj->oo_lma_flags =
3223                                 attr->la_flags & LUSTRE_LMA_FL_MASKS;
3224                 }
3225                 osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
3226         }
3227 out:
3228
3229         return rc;
3230 }
3231
3232 static struct dentry *osd_child_dentry_get(const struct lu_env *env,
3233                                            struct osd_object *obj,
3234                                            const char *name, const int namelen)
3235 {
3236         return osd_child_dentry_by_inode(env, obj->oo_inode, name, namelen);
3237 }
3238
3239 static int osd_mkfile(struct osd_thread_info *info, struct osd_object *obj,
3240                       umode_t mode, struct dt_allocation_hint *hint,
3241                       struct thandle *th, struct lu_attr *attr)
3242 {
3243         int result;
3244         struct osd_device *osd = osd_obj2dev(obj);
3245         struct osd_thandle *oth;
3246         struct dt_object *parent = NULL;
3247         struct inode *inode;
3248         struct iattr iattr = {
3249                 .ia_valid = ATTR_UID | ATTR_GID |
3250                             ATTR_CTIME | ATTR_MTIME | ATTR_ATIME,
3251                 .ia_ctime.tv_sec = attr->la_ctime,
3252                 .ia_mtime.tv_sec = attr->la_mtime,
3253                 .ia_atime.tv_sec = attr->la_atime,
3254                 .ia_uid = GLOBAL_ROOT_UID,
3255                 .ia_gid = GLOBAL_ROOT_GID,
3256         };
3257         const struct osd_timespec omit = { .tv_nsec = UTIME_OMIT };
3258
3259         if (attr->la_valid & LA_UID)
3260                 iattr.ia_uid = make_kuid(&init_user_ns, attr->la_uid);
3261         if (attr->la_valid & LA_GID)
3262                 iattr.ia_gid = make_kgid(&init_user_ns, attr->la_gid);
3263
3264         LINVRNT(osd_invariant(obj));
3265         LASSERT(obj->oo_inode == NULL);
3266         LASSERT(obj->oo_hl_head == NULL);
3267
3268         if (S_ISDIR(mode) && ldiskfs_pdo) {
3269                 obj->oo_hl_head =
3270                         ldiskfs_htree_lock_head_alloc(HTREE_HBITS_DEF);
3271                 if (obj->oo_hl_head == NULL)
3272                         return -ENOMEM;
3273         }
3274
3275         oth = container_of(th, struct osd_thandle, ot_super);
3276         LASSERT(oth->ot_handle->h_transaction != NULL);
3277
3278         if (hint != NULL && hint->dah_parent != NULL &&
3279             !dt_object_remote(hint->dah_parent))
3280                 parent = hint->dah_parent;
3281
3282         /* if a time component is not valid set it to UTIME_OMIT */
3283         if (!(attr->la_valid & LA_CTIME))
3284                 iattr.ia_ctime = omit;
3285         if (!(attr->la_valid & LA_MTIME))
3286                 iattr.ia_mtime = omit;
3287         if (!(attr->la_valid & LA_ATIME))
3288                 iattr.ia_atime = omit;
3289
3290         inode = ldiskfs_create_inode(oth->ot_handle,
3291                                      parent ? osd_dt_obj(parent)->oo_inode :
3292                                               osd_sb(osd)->s_root->d_inode,
3293                                      mode, &iattr);
3294         if (!IS_ERR(inode)) {
3295                 /* Do not update file c/mtime in ldiskfs. */
3296                 inode->i_flags |= S_NOCMTIME;
3297
3298                 /*
3299                  * For new created object, it must be consistent,
3300                  * and it is unnecessary to scrub against it.
3301                  */
3302                 ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_NOSCRUB);
3303
3304                 obj->oo_inode = inode;
3305                 result = 0;
3306         } else {
3307                 if (obj->oo_hl_head != NULL) {
3308                         ldiskfs_htree_lock_head_free(obj->oo_hl_head);
3309                         obj->oo_hl_head = NULL;
3310                 }
3311                 result = PTR_ERR(inode);
3312         }
3313         LINVRNT(osd_invariant(obj));
3314         return result;
3315 }
3316
3317 enum {
3318         OSD_NAME_LEN = 255
3319 };
3320
3321 static int osd_mkdir(struct osd_thread_info *info, struct osd_object *obj,
3322                      struct lu_attr *attr,
3323                      struct dt_allocation_hint *hint,
3324                      struct dt_object_format *dof,
3325                      struct thandle *th)
3326 {
3327         int result;
3328         struct osd_thandle *oth;
3329         __u32 mode = (attr->la_mode & (S_IFMT | S_IRWXUGO | S_ISVTX | S_ISGID));
3330
3331         LASSERT(S_ISDIR(attr->la_mode));
3332
3333         oth = container_of(th, struct osd_thandle, ot_super);
3334         LASSERT(oth->ot_handle->h_transaction != NULL);
3335         if (fid_is_namespace_visible(lu_object_fid(&obj->oo_dt.do_lu)))
3336                 obj->oo_dirent_count = 0;
3337         result = osd_mkfile(info, obj, mode, hint, th, attr);
3338
3339         return result;
3340 }
3341
3342 static int osd_mk_index(struct osd_thread_info *info, struct osd_object *obj,
3343                         struct lu_attr *attr,
3344                         struct dt_allocation_hint *hint,
3345                         struct dt_object_format *dof,
3346                         struct thandle *th)
3347 {
3348         int result;
3349         struct osd_thandle *oth;
3350         const struct dt_index_features *feat = dof->u.dof_idx.di_feat;
3351
3352         __u32 mode = (attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX));
3353
3354         LASSERT(S_ISREG(attr->la_mode));
3355
3356         oth = container_of(th, struct osd_thandle, ot_super);
3357         LASSERT(oth->ot_handle->h_transaction != NULL);
3358
3359         result = osd_mkfile(info, obj, mode, hint, th, attr);
3360         if (result == 0) {
3361                 LASSERT(obj->oo_inode != NULL);
3362                 if (feat->dif_flags & DT_IND_VARKEY)
3363                         result = iam_lvar_create(obj->oo_inode,
3364                                                  feat->dif_keysize_max,
3365                                                  feat->dif_ptrsize,
3366                                                  feat->dif_recsize_max,
3367                                                  oth->ot_handle);
3368                 else
3369                         result = iam_lfix_create(obj->oo_inode,
3370                                                  feat->dif_keysize_max,
3371                                                  feat->dif_ptrsize,
3372                                                  feat->dif_recsize_max,
3373                                                  oth->ot_handle);
3374         }
3375         return result;
3376 }
3377
3378 static int osd_mkreg(struct osd_thread_info *info, struct osd_object *obj,
3379                      struct lu_attr *attr,
3380                      struct dt_allocation_hint *hint,
3381                      struct dt_object_format *dof,
3382                      struct thandle *th)
3383 {
3384         LASSERT(S_ISREG(attr->la_mode));
3385         return osd_mkfile(info, obj, (attr->la_mode &
3386                          (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th,
3387                           attr);
3388 }
3389
3390 static int osd_mksym(struct osd_thread_info *info, struct osd_object *obj,
3391                      struct lu_attr *attr,
3392                      struct dt_allocation_hint *hint,
3393                      struct dt_object_format *dof,
3394                      struct thandle *th)
3395 {
3396         LASSERT(S_ISLNK(attr->la_mode));
3397         return osd_mkfile(info, obj, (attr->la_mode &
3398                          (S_IFMT | S_IALLUGO | S_ISVTX)), hint, th,
3399                           attr);
3400 }
3401
3402 static int osd_mknod(struct osd_thread_info *info, struct osd_object *obj,
3403                      struct lu_attr *attr,
3404                      struct dt_allocation_hint *hint,
3405                      struct dt_object_format *dof,
3406                      struct thandle *th)
3407 {
3408         umode_t mode = attr->la_mode & (S_IFMT | S_IALLUGO | S_ISVTX);
3409         int result;
3410
3411         LINVRNT(osd_invariant(obj));
3412         LASSERT(obj->oo_inode == NULL);
3413         LASSERT(S_ISCHR(mode) || S_ISBLK(mode) ||
3414                 S_ISFIFO(mode) || S_ISSOCK(mode));
3415
3416         result = osd_mkfile(info, obj, mode, hint, th, attr);
3417         if (result == 0) {
3418                 LASSERT(obj->oo_inode != NULL);
3419                 /*
3420                  * This inode should be marked dirty for i_rdev.  Currently
3421                  * that is done in the osd_attr_init().
3422                  */
3423                 init_special_inode(obj->oo_inode, obj->oo_inode->i_mode,
3424                                    attr->la_rdev);
3425         }
3426         LINVRNT(osd_invariant(obj));
3427         return result;
3428 }
3429
3430 typedef int (*osd_obj_type_f)(struct osd_thread_info *, struct osd_object *,
3431                               struct lu_attr *,
3432                               struct dt_allocation_hint *hint,
3433                               struct dt_object_format *dof,
3434                               struct thandle *);
3435
3436 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
3437 {
3438         osd_obj_type_f result;
3439
3440         switch (type) {
3441         case DFT_DIR:
3442                 result = osd_mkdir;
3443                 break;
3444         case DFT_REGULAR:
3445                 result = osd_mkreg;
3446                 break;
3447         case DFT_SYM:
3448                 result = osd_mksym;
3449                 break;
3450         case DFT_NODE:
3451                 result = osd_mknod;
3452                 break;
3453         case DFT_INDEX:
3454                 result = osd_mk_index;
3455                 break;
3456
3457         default:
3458                 LBUG();
3459                 break;
3460         }
3461         return result;
3462 }
3463
3464 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
3465                         struct dt_object *parent, struct dt_object *child,
3466                         umode_t child_mode)
3467 {
3468         LASSERT(ah);
3469
3470         ah->dah_parent = parent;
3471         ah->dah_mode = child_mode;
3472
3473         if (parent != NULL && !dt_object_remote(parent)) {
3474                 /* will help to find FID->ino at dt_insert("..") */
3475                 struct osd_object *pobj = osd_dt_obj(parent);
3476
3477                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
3478         }
3479 }
3480
3481 static void osd_attr_init(struct osd_thread_info *info, struct osd_object *obj,
3482                           struct lu_attr *attr, struct dt_object_format *dof,
3483                           struct thandle *handle)
3484 {
3485         struct inode *inode = obj->oo_inode;
3486         __u64 valid = attr->la_valid;
3487         int result;
3488
3489         attr->la_valid &= ~(LA_TYPE | LA_MODE);
3490
3491         if (dof->dof_type != DFT_NODE)
3492                 attr->la_valid &= ~LA_RDEV;
3493         if ((valid & LA_ATIME) && (attr->la_atime == inode->i_atime.tv_sec))
3494                 attr->la_valid &= ~LA_ATIME;
3495         if ((valid & LA_CTIME) && (attr->la_ctime == inode->i_ctime.tv_sec))
3496                 attr->la_valid &= ~LA_CTIME;
3497         if ((valid & LA_MTIME) && (attr->la_mtime == inode->i_mtime.tv_sec))
3498                 attr->la_valid &= ~LA_MTIME;
3499
3500         result = osd_quota_transfer(inode, attr, handle);
3501         if (result)
3502                 return;
3503
3504         if (attr->la_valid != 0) {
3505                 result = osd_inode_setattr(info->oti_env, inode, attr);
3506                 /*
3507                  * The osd_inode_setattr() should always succeed here.  The
3508                  * only error that could be returned is EDQUOT when we are
3509                  * trying to change the UID or GID of the inode. However, this
3510                  * should not happen since quota enforcement is no longer
3511                  * enabled on ldiskfs (lquota takes care of it).
3512                  */
3513                 LASSERTF(result == 0, "%d\n", result);
3514                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3515         }
3516
3517         attr->la_valid = valid;
3518 }
3519
3520 /**
3521  * Helper function for osd_create()
3522  *
3523  * \retval 0, on success
3524  */
3525 static int __osd_create(struct osd_thread_info *info, struct osd_object *obj,
3526                         struct lu_attr *attr, struct dt_allocation_hint *hint,
3527                         struct dt_object_format *dof, struct thandle *th)
3528 {
3529         int result;
3530         __u32 umask;
3531
3532         osd_trans_exec_op(info->oti_env, th, OSD_OT_CREATE);
3533
3534         /* we drop umask so that permissions we pass are not affected */
3535         umask = current->fs->umask;
3536         current->fs->umask = 0;
3537
3538         result = osd_create_type_f(dof->dof_type)(info, obj, attr, hint, dof,
3539                                                   th);
3540         if (likely(obj->oo_inode != NULL)) {
3541                 LASSERT(obj->oo_inode->i_state & I_NEW);
3542
3543                 /*
3544                  * Unlock the inode before attr initialization to avoid
3545                  * unnecessary dqget operations. LU-6378
3546                  */
3547                 unlock_new_inode(obj->oo_inode);
3548         }
3549
3550         if (likely(result == 0)) {
3551                 osd_attr_init(info, obj, attr, dof, th);
3552                 osd_object_init0(obj);
3553         }
3554
3555         /* restore previous umask value */
3556         current->fs->umask = umask;
3557
3558         osd_trans_exec_check(info->oti_env, th, OSD_OT_CREATE);
3559
3560         return result;
3561 }
3562
3563 /**
3564  * Helper function for osd_create()
3565  *
3566  * \retval 0, on success
3567  */
3568 static int __osd_oi_insert(const struct lu_env *env, struct osd_object *obj,
3569                            const struct lu_fid *fid, struct thandle *th)
3570 {
3571         struct osd_thread_info *info = osd_oti_get(env);
3572         struct osd_inode_id    *id   = &info->oti_id;
3573         struct osd_device      *osd  = osd_obj2dev(obj);
3574         struct osd_thandle     *oh;
3575         int rc;
3576
3577         LASSERT(obj->oo_inode != NULL);
3578
3579         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_OI_ENOSPC))
3580                 return -ENOSPC;
3581
3582         oh = container_of(th, struct osd_thandle, ot_super);
3583         LASSERT(oh->ot_handle);
3584         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3585
3586         osd_id_gen(id, obj->oo_inode->i_ino, obj->oo_inode->i_generation);
3587         rc = osd_oi_insert(info, osd, fid, id, oh->ot_handle,
3588                            OI_CHECK_FLD, NULL);
3589         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DUPLICATE_MAP) && osd->od_is_ost) {
3590                 struct lu_fid next_fid = *fid;
3591
3592                 /* insert next object in advance, and map to the same inode */
3593                 next_fid.f_oid++;
3594                 if (next_fid.f_oid != 0) {
3595                         osd_trans_exec_op(env, th, OSD_OT_INSERT);
3596                         osd_oi_insert(info, osd, &next_fid, id, oh->ot_handle,
3597                                       OI_CHECK_FLD, NULL);
3598                         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3599                 }
3600         }
3601
3602         osd_trans_exec_check(env, th, OSD_OT_INSERT);
3603
3604         return rc;
3605 }
3606
3607 int osd_fld_lookup(const struct lu_env *env, struct osd_device *osd,
3608                    u64 seq, struct lu_seq_range *range)
3609 {
3610         struct seq_server_site *ss = osd_seq_site(osd);
3611
3612         if (fid_seq_is_idif(seq)) {
3613                 fld_range_set_ost(range);
3614                 range->lsr_index = idif_ost_idx(seq);
3615                 return 0;
3616         }
3617
3618         if (!fid_seq_in_fldb(seq)) {
3619                 fld_range_set_mdt(range);
3620                 if (ss != NULL)
3621                         /*
3622                          * FIXME: If ss is NULL, it suppose not get lsr_index
3623                          * at all
3624                          */
3625                         range->lsr_index = ss->ss_node_id;
3626                 return 0;
3627         }
3628
3629         LASSERT(ss != NULL);
3630         fld_range_set_any(range);
3631         /* OSD will only do local fld lookup */
3632         return fld_local_lookup(env, ss->ss_server_fld, seq, range);
3633 }
3634
3635 static int osd_declare_create(const struct lu_env *env, struct dt_object *dt,
3636                               struct lu_attr *attr,
3637                               struct dt_allocation_hint *hint,
3638                               struct dt_object_format *dof,
3639                               struct thandle *handle)
3640 {
3641         struct osd_thandle *oh;
3642         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
3643         int credits;
3644         int rc;
3645
3646         ENTRY;
3647
3648         LASSERT(handle != NULL);
3649
3650         oh = container_of(handle, struct osd_thandle, ot_super);
3651         LASSERT(oh->ot_handle == NULL);
3652
3653         /*
3654          * EA object consumes more credits than regular object: osd_mk_index
3655          * vs. osd_mkreg: osd_mk_index will create 2 blocks for root_node and
3656          * leaf_node, could involves the block, block bitmap, groups, GDT
3657          * change for each block, so add 4 * 2 credits in that case.
3658          *
3659          * The default ACL initialization may consume an additional 16 blocks
3660          */
3661         credits = osd_dto_credits_noquota[DTO_OBJECT_CREATE] +
3662                   ((dof->dof_type == DFT_INDEX) ? 4 * 2 : 0);
3663
3664         /**
3665          * While ldiskfs_new_inode() calls ldiskfs_init_acl() we have to add
3666          * credits for possible default ACL creation in new inode
3667          */
3668         if (hint && hint->dah_acl_len)
3669                 credits += osd_calc_bkmap_credits(sb, NULL, 0, -1,
3670                                 (hint->dah_acl_len + sb->s_blocksize - 1) >>
3671                                 sb->s_blocksize_bits);
3672
3673         osd_trans_declare_op(env, oh, OSD_OT_CREATE, credits);
3674
3675         /*
3676          * Reuse idle OI block may cause additional one OI block
3677          * to be changed.
3678          */
3679         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3680                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3681         if (CFS_FAIL_CHECK(OBD_FAIL_OSD_DUPLICATE_MAP))
3682                 osd_trans_declare_op(env, oh, OSD_OT_INSERT,
3683                              osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1);
3684
3685         /* will help to find FID->ino mapping at dt_insert() */
3686         rc = osd_idc_find_and_init(env, osd_obj2dev(osd_dt_obj(dt)),
3687                                    osd_dt_obj(dt));
3688         if (rc != 0)
3689                 RETURN(rc);
3690
3691         if (!attr)
3692                 RETURN(0);
3693
3694         rc = osd_declare_inode_qid(env, attr->la_uid, attr->la_gid,
3695                                    attr->la_projid, 1, oh, osd_dt_obj(dt),
3696                                    NULL, OSD_QID_INODE);
3697         if (rc != 0)
3698                 RETURN(rc);
3699
3700         RETURN(rc);
3701 }
3702
3703 /**
3704  * Called to destroy on-disk representation of the object
3705  *
3706  * Concurrency: must be locked
3707  */
3708 static int osd_declare_destroy(const struct lu_env *env, struct dt_object *dt,
3709                                struct thandle *th)
3710 {
3711         struct osd_object *obj = osd_dt_obj(dt);
3712         struct inode *inode = obj->oo_inode;
3713         struct osd_thandle *oh;
3714         int rc;
3715
3716         ENTRY;
3717
3718         if (inode == NULL)
3719                 RETURN(-ENOENT);
3720
3721         oh = container_of(th, struct osd_thandle, ot_super);
3722         LASSERT(oh->ot_handle == NULL);
3723
3724         osd_trans_declare_op(env, oh, OSD_OT_DESTROY,
3725                              osd_dto_credits_noquota[DTO_OBJECT_DELETE]);
3726
3727         /* For removing agent entry */
3728         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu))
3729                 oh->ot_credits += osd_dto_credits_noquota[DTO_INDEX_DELETE];
3730
3731         /*
3732          * Recycle idle OI leaf may cause additional three OI blocks
3733          * to be changed.
3734          */
3735         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3736                 osd_trans_declare_op(env, oh, OSD_OT_DELETE,
3737                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
3738         /* one less inode */
3739         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3740                                    i_projid_read(inode), -1, oh, obj, NULL,
3741                                    OSD_QID_INODE);
3742         if (rc)
3743                 RETURN(rc);
3744         /* data to be truncated */
3745         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
3746                                    i_projid_read(inode), 0, oh, obj, NULL,
3747                                    OSD_QID_BLK);
3748         if (rc)
3749                 RETURN(rc);
3750
3751         /*
3752          * will help to find FID->ino when this object is being
3753          * added to PENDING
3754          */
3755         rc = osd_idc_find_and_init(env, osd_obj2dev(obj), obj);
3756
3757         RETURN(rc);
3758 }
3759
3760 static int osd_destroy(const struct lu_env *env, struct dt_object *dt,
3761                        struct thandle *th)
3762 {
3763         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
3764         struct osd_object *obj = osd_dt_obj(dt);
3765         struct inode *inode = obj->oo_inode;
3766         struct osd_device *osd = osd_obj2dev(obj);
3767         struct osd_thandle *oh;
3768         int result;
3769
3770         ENTRY;
3771
3772         oh = container_of(th, struct osd_thandle, ot_super);
3773         LASSERT(oh->ot_handle);
3774         LASSERT(inode);
3775         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
3776
3777         if (unlikely(fid_is_acct(fid)))
3778                 RETURN(-EPERM);
3779
3780         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu)) {
3781                 result = osd_delete_from_remote_parent(env, osd, obj, oh, true);
3782                 if (result != 0)
3783                         CERROR("%s: remove agent entry "DFID": rc = %d\n",
3784                                osd_name(osd), PFID(fid), result);
3785         }
3786
3787         if (S_ISDIR(inode->i_mode)) {
3788                 if (inode->i_nlink > 2)
3789                         CERROR("%s: directory "DFID" ino %lu link count is %u at unlink. run e2fsck to repair\n",
3790                                osd_name(osd), PFID(fid), inode->i_ino,
3791                                inode->i_nlink);
3792
3793                 spin_lock(&obj->oo_guard);
3794                 clear_nlink(inode);
3795                 spin_unlock(&obj->oo_guard);
3796                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
3797         }
3798
3799         osd_trans_exec_op(env, th, OSD_OT_DESTROY);
3800
3801         ldiskfs_set_inode_state(inode, LDISKFS_STATE_LUSTRE_DESTROY);
3802
3803         if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ2))
3804                 result = osd_oi_delete(osd_oti_get(env), osd, fid,
3805                                        oh->ot_handle, OI_CHECK_FLD);
3806
3807         osd_trans_exec_check(env, th, OSD_OT_DESTROY);
3808         /* XXX: add to ext3 orphan list */
3809         /* rc = ext3_orphan_add(handle_t *handle, struct inode *inode) */
3810
3811         /* not needed in the cache anymore */
3812         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
3813         obj->oo_destroyed = 1;
3814
3815         RETURN(0);
3816 }
3817
3818 /**
3819  * Put the fid into lustre_mdt_attrs, and then place the structure
3820  * inode's ea. This fid should not be altered during the life time
3821  * of the inode.
3822  *
3823  * \retval +ve, on success
3824  * \retval -ve, on error
3825  *
3826  * FIXME: It is good to have/use ldiskfs_xattr_set_handle() here
3827  */
3828 int osd_ea_fid_set(struct osd_thread_info *info, struct inode *inode,
3829                    const struct lu_fid *fid, __u32 compat, __u32 incompat)
3830 {
3831         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
3832         struct lustre_mdt_attrs *lma = &loa->loa_lma;
3833         int rc;
3834
3835         ENTRY;
3836
3837         if (OBD_FAIL_CHECK(OBD_FAIL_FID_INLMA))
3838                 RETURN(0);
3839
3840         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_OST_EA_FID_SET))
3841                 rc = -ENOMEM;
3842
3843         lustre_loa_init(loa, fid, compat, incompat);
3844         lustre_loa_swab(loa, false);
3845
3846         /*
3847          * For the OST device with 256 bytes inode size by default,
3848          * the PFID EA will be stored together with LMA EA to avoid
3849          * performance trouble. Otherwise the PFID EA can be stored
3850          * independently. LU-8998
3851          */
3852         if ((compat & LMAC_FID_ON_OST) &&
3853             LDISKFS_INODE_SIZE(inode->i_sb) <= 256)
3854                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3855                                      sizeof(*loa), XATTR_CREATE);
3856         else
3857                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3858                                      sizeof(*lma), XATTR_CREATE);
3859         /*
3860          * LMA may already exist, but we need to check that all the
3861          * desired compat/incompat flags have been added.
3862          */
3863         if (unlikely(rc == -EEXIST)) {
3864                 rc = __osd_xattr_get(inode, &info->oti_obj_dentry,
3865                                      XATTR_NAME_LMA, (void *)loa, sizeof(*loa));
3866                 if (rc < 0)
3867                         RETURN(rc);
3868
3869                 if (rc < sizeof(*lma))
3870                         RETURN(-EINVAL);
3871
3872                 lustre_loa_swab(loa, true);
3873                 if (lu_fid_eq(fid, &lma->lma_self_fid) &&
3874                     ((compat == 0 && incompat == 0) ||
3875                      (!(~lma->lma_compat & compat) &&
3876                       !(~lma->lma_incompat & incompat))))
3877                         RETURN(0);
3878
3879                 lma->lma_self_fid = *fid;
3880                 lma->lma_compat |= compat;
3881                 lma->lma_incompat |= incompat;
3882                 if (rc == sizeof(*lma)) {
3883                         lustre_lma_swab(lma);
3884                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
3885                                              sizeof(*lma), XATTR_REPLACE);
3886                 } else {
3887                         lustre_loa_swab(loa, false);
3888                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa,
3889                                              sizeof(*loa), XATTR_REPLACE);
3890                 }
3891         }
3892
3893         RETURN(rc);
3894 }
3895
3896 /**
3897  * ldiskfs supports fid in dirent, it is passed in dentry->d_fsdata.
3898  * lustre 1.8 also uses d_fsdata for passing other info to ldiskfs.
3899  * To have compatilibility with 1.8 ldiskfs driver we need to have
3900  * magic number at start of fid data.
3901  * \ldiskfs_dentry_param is used only to pass fid from osd to ldiskfs.
3902  * its inmemory API.
3903  */
3904 static void osd_get_ldiskfs_dirent_param(struct ldiskfs_dentry_param *param,
3905                                          const struct lu_fid *fid)
3906 {
3907         if (!fid_is_namespace_visible(fid) ||
3908             OBD_FAIL_CHECK(OBD_FAIL_FID_IGIF)) {
3909                 param->edp_magic = 0;
3910                 return;
3911         }
3912
3913         param->edp_magic = LDISKFS_LUFID_MAGIC;
3914         param->edp_len =  sizeof(struct lu_fid) + 1;
3915         fid_cpu_to_be((struct lu_fid *)param->edp_data, (struct lu_fid *)fid);
3916 }
3917
3918 /**
3919  * Try to read the fid from inode ea into dt_rec.
3920  *
3921  * \param fid object fid.
3922  *
3923  * \retval 0 on success
3924  */
3925 static int osd_ea_fid_get(const struct lu_env *env, struct osd_object *obj,
3926                           __u32 ino, struct lu_fid *fid,
3927                           struct osd_inode_id *id)
3928 {
3929         struct osd_thread_info *info  = osd_oti_get(env);
3930         struct inode *inode;
3931
3932         ENTRY;
3933
3934         osd_id_gen(id, ino, OSD_OII_NOGEN);
3935         inode = osd_iget_fid(info, osd_obj2dev(obj), id, fid);
3936         if (IS_ERR(inode))
3937                 RETURN(PTR_ERR(inode));
3938
3939         iput(inode);
3940         RETURN(0);
3941 }
3942
3943 static int osd_add_dot_dotdot_internal(struct osd_thread_info *info,
3944                                         struct inode *dir,
3945                                         struct inode *parent_dir,
3946                                         const struct lu_fid *dot_fid,
3947                                         const struct lu_fid *dot_dot_fid,
3948                                         struct osd_thandle *oth)
3949 {
3950         struct ldiskfs_dentry_param *dot_ldp;
3951         struct ldiskfs_dentry_param *dot_dot_ldp;
3952         __u32 saved_nlink = dir->i_nlink;
3953         int rc;
3954
3955         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_DOTDOT_ENOSPC))
3956                 return -ENOSPC;
3957
3958         dot_dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp2;
3959         osd_get_ldiskfs_dirent_param(dot_dot_ldp, dot_dot_fid);
3960
3961         dot_ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
3962         dot_ldp->edp_magic = 0;
3963
3964         rc = ldiskfs_add_dot_dotdot(oth->ot_handle, parent_dir,
3965                                     dir, dot_ldp, dot_dot_ldp);
3966         /*
3967          * The ldiskfs_add_dot_dotdot() may dir->i_nlink as 2, then
3968          * the subseqent ref_add() will increase the dir->i_nlink
3969          * as 3. That is incorrect for new created directory.
3970          *
3971          * It looks like hack, because we want to make the OSD API
3972          * to be order-independent for new created directory object
3973          * between dt_insert(..) and ref_add() operations.
3974          *
3975          * Here, we only restore the in-RAM dir-inode's nlink attr,
3976          * becuase if the nlink attr is not 2, then there will be
3977          * ref_add() called following the dt_insert(..), such call
3978          * will make both the in-RAM and on-disk dir-inode's nlink
3979          * attr to be set as 2. LU-7447
3980          */
3981         set_nlink(dir, saved_nlink);
3982         return rc;
3983 }
3984
3985 /**
3986  * Create an local agent inode for remote entry
3987  */
3988 static struct inode *osd_create_local_agent_inode(const struct lu_env *env,
3989                                                   struct osd_device *osd,
3990                                                   struct osd_object *pobj,
3991                                                   const struct lu_fid *fid,
3992                                                   __u32 type,
3993                                                   struct thandle *th)
3994 {
3995         struct osd_thread_info *info = osd_oti_get(env);
3996         struct inode *local;
3997         struct osd_thandle *oh;
3998         struct iattr iattr = {
3999                 .ia_valid = ATTR_UID | ATTR_GID |
4000                             ATTR_CTIME | ATTR_MTIME | ATTR_ATIME,
4001                 .ia_ctime.tv_nsec = UTIME_OMIT,
4002                 .ia_mtime.tv_nsec = UTIME_OMIT,
4003                 .ia_atime.tv_nsec = UTIME_OMIT,
4004                 .ia_uid = GLOBAL_ROOT_UID,
4005                 .ia_gid = GLOBAL_ROOT_GID,
4006         };
4007         int rc;
4008
4009         ENTRY;
4010
4011         LASSERT(th);
4012         oh = container_of(th, struct osd_thandle, ot_super);
4013         LASSERT(oh->ot_handle->h_transaction != NULL);
4014
4015         local = ldiskfs_create_inode(oh->ot_handle, pobj->oo_inode,
4016                                      type, &iattr);
4017         if (IS_ERR(local)) {
4018                 CERROR("%s: create local error %d\n", osd_name(osd),
4019                        (int)PTR_ERR(local));
4020                 RETURN(local);
4021         }
4022
4023         /*
4024          * restore i_gid in case S_ISGID is set, we will inherit S_ISGID and set
4025          * correct gid on remote file, not agent here
4026          */
4027         local->i_gid = current_fsgid();
4028         ldiskfs_set_inode_state(local, LDISKFS_STATE_LUSTRE_NOSCRUB);
4029
4030         /* e2fsck doesn't like empty symlinks.  Store remote FID as symlink.
4031          * That gives e2fsck something to look at and be happy, and allows
4032          * debugging if we need to determine where this symlink came from.
4033          */
4034         if (S_ISLNK(type)) {
4035                 BUILD_BUG_ON(LDISKFS_N_BLOCKS * 4 < FID_LEN + 1);
4036                 rc = scnprintf((char *)LDISKFS_I(local)->i_data,
4037                                LDISKFS_N_BLOCKS * 4, DFID, PFID(fid));
4038
4039                 i_size_write(local, rc);
4040                 LDISKFS_I(local)->i_disksize = rc;
4041         }
4042         unlock_new_inode(local);
4043
4044         /* Agent inode should not have project ID */
4045 #ifdef  HAVE_PROJECT_QUOTA
4046         if (LDISKFS_I(pobj->oo_inode)->i_flags & LUSTRE_PROJINHERIT_FL &&
4047             i_projid_read(pobj->oo_inode) != 0) {
4048                 rc = osd_transfer_project(local, 0, th);
4049                 if (rc) {
4050                         CERROR("%s: quota transfer failed:. Is project quota enforcement enabled on the ldiskfs filesystem? rc = %d\n",
4051                                osd_ino2name(local), rc);
4052                         RETURN(ERR_PTR(rc));
4053                 }
4054         }
4055 #endif
4056         /* Set special LMA flag for local agent inode */
4057         rc = osd_ea_fid_set(info, local, fid, 0, LMAI_AGENT);
4058         if (rc != 0) {
4059                 CERROR("%s: set LMA for "DFID" remote inode failed: rc = %d\n",
4060                        osd_name(osd), PFID(fid), rc);
4061                 RETURN(ERR_PTR(rc));
4062         }
4063
4064         if (!S_ISDIR(type))
4065                 RETURN(local);
4066
4067         rc = osd_add_dot_dotdot_internal(info, local, pobj->oo_inode,
4068                                          lu_object_fid(&pobj->oo_dt.do_lu),
4069                                          fid, oh);
4070         if (rc != 0) {
4071                 CERROR("%s: "DFID" add dot dotdot error: rc = %d\n",
4072                         osd_name(osd), PFID(fid), rc);
4073                 RETURN(ERR_PTR(rc));
4074         }
4075
4076         RETURN(local);
4077 }
4078
4079 /**
4080  * when direntry is deleted, we have to take care of possible agent inode
4081  * referenced by that. unfortunately we can't do this at that point:
4082  * iget() within a running transaction leads to deadlock and we better do
4083  * not call that every delete declaration to save performance. so we put
4084  * a potention agent inode on a list and process that once the transaction
4085  * is over. Notice it's not any worse in terms of real orphans as regular
4086  * object destroy doesn't put inodes on the on-disk orphan list. this should
4087  * be addressed separately
4088  */
4089 static int osd_schedule_agent_inode_removal(const struct lu_env *env,
4090                                             struct osd_thandle *oh,
4091                                             __u32 ino)
4092 {
4093         struct osd_device *osd = osd_dt_dev(oh->ot_super.th_dev);
4094         struct osd_obj_orphan *oor;
4095
4096         OBD_ALLOC_PTR(oor);
4097         if (oor == NULL)
4098                 return -ENOMEM;
4099
4100         oor->oor_ino = ino;
4101         oor->oor_env = (struct lu_env *)env;
4102         spin_lock(&osd->od_osfs_lock);
4103         list_add(&oor->oor_list, &osd->od_orphan_list);
4104         spin_unlock(&osd->od_osfs_lock);
4105
4106         oh->ot_remove_agents = 1;
4107
4108         return 0;
4109
4110 }
4111
4112 static int osd_process_scheduled_agent_removals(const struct lu_env *env,
4113                                                 struct osd_device *osd)
4114 {
4115         struct osd_thread_info *info = osd_oti_get(env);
4116         struct osd_obj_orphan *oor, *tmp;
4117         struct osd_inode_id id;
4118         LIST_HEAD(list);
4119         struct inode *inode;
4120         struct lu_fid fid;
4121         handle_t *jh;
4122         __u32 ino;
4123
4124         spin_lock(&osd->od_osfs_lock);
4125         list_for_each_entry_safe(oor, tmp, &osd->od_orphan_list, oor_list) {
4126                 if (oor->oor_env == env)
4127                         list_move(&oor->oor_list, &list);
4128         }
4129         spin_unlock(&osd->od_osfs_lock);
4130
4131         list_for_each_entry_safe(oor, tmp, &list, oor_list) {
4132
4133                 ino = oor->oor_ino;
4134
4135                 list_del(&oor->oor_list);
4136                 OBD_FREE_PTR(oor);
4137
4138                 osd_id_gen(&id, ino, OSD_OII_NOGEN);
4139                 inode = osd_iget_fid(info, osd, &id, &fid);
4140                 if (IS_ERR(inode))
4141                         continue;
4142
4143                 if (!osd_remote_fid(env, osd, &fid)) {
4144                         iput(inode);
4145                         continue;
4146                 }
4147
4148                 jh = osd_journal_start_sb(osd_sb(osd), LDISKFS_HT_MISC, 1);
4149                 clear_nlink(inode);
4150                 mark_inode_dirty(inode);
4151                 ldiskfs_journal_stop(jh);
4152                 iput(inode);
4153         }
4154
4155         return 0;
4156 }
4157
4158 /**
4159  * OSD layer object create function for OST objects (b=11826).
4160  *
4161  * The FID is inserted into inode xattr here.
4162  *
4163  * \retval   0, on success
4164  * \retval -ve, on error
4165  */
4166 static int osd_create(const struct lu_env *env, struct dt_object *dt,
4167                       struct lu_attr *attr, struct dt_allocation_hint *hint,
4168                       struct dt_object_format *dof, struct thandle *th)
4169 {
4170         const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
4171         struct osd_object *obj = osd_dt_obj(dt);
4172         struct osd_thread_info *info = osd_oti_get(env);
4173         int result, on_ost = 0;
4174
4175         ENTRY;
4176
4177         if (dt_object_exists(dt))
4178                 RETURN(-EEXIST);
4179
4180         LINVRNT(osd_invariant(obj));
4181         LASSERT(!dt_object_remote(dt));
4182         LASSERT(osd_is_write_locked(env, obj));
4183         LASSERT(th != NULL);
4184
4185         if (unlikely(fid_is_acct(fid)))
4186                 /*
4187                  * Quota files can't be created from the kernel any more,
4188                  * 'tune2fs -O quota' will take care of creating them
4189                  */
4190                 RETURN(-EPERM);
4191
4192         result = __osd_create(info, obj, attr, hint, dof, th);
4193         if (result == 0) {
4194                 if (fid_is_idif(fid) &&
4195                     !osd_dev(dt->do_lu.lo_dev)->od_index_in_idif) {
4196                         struct lu_fid *tfid = &info->oti_fid;
4197                         struct ost_id *oi   = &info->oti_ostid;
4198
4199                         fid_to_ostid(fid, oi);
4200                         ostid_to_fid(tfid, oi, 0);
4201                         on_ost = 1;
4202                         result = osd_ea_fid_set(info, obj->oo_inode, tfid,
4203                                                 LMAC_FID_ON_OST, 0);
4204                 } else {
4205                         on_ost = fid_is_on_ost(info, osd_obj2dev(obj),
4206                                                fid, OI_CHECK_FLD);
4207                         result = osd_ea_fid_set(info, obj->oo_inode, fid,
4208                                                 on_ost ? LMAC_FID_ON_OST : 0,
4209                                                 0);
4210                 }
4211                 if (obj->oo_dt.do_body_ops == &osd_body_ops_new)
4212                         obj->oo_dt.do_body_ops = &osd_body_ops;
4213         }
4214
4215         if (!result && !CFS_FAIL_CHECK(OBD_FAIL_OSD_NO_OI_ENTRY)) {
4216                 struct inode *inode = obj->oo_inode;
4217
4218                 result = __osd_oi_insert(env, obj, fid, th);
4219                 if (result && inode) {
4220                         spin_lock(&obj->oo_guard);
4221                         clear_nlink(inode);
4222                         spin_unlock(&obj->oo_guard);
4223                         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4224                         ldiskfs_set_inode_state(inode,
4225                                                 LDISKFS_STATE_LUSTRE_DESTROY);
4226                         iput(inode);
4227                         obj->oo_inode = NULL;
4228                 }
4229         }
4230
4231         /*
4232          * a small optimization - dt_insert() isn't usually applied
4233          * to OST objects, so we don't need to cache OI mapping for
4234          * OST objects
4235          */
4236         if (result == 0 && on_ost == 0) {
4237                 struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
4238
4239                 result = osd_idc_find_and_init(env, osd, obj);
4240                 LASSERT(result == 0);
4241         }
4242
4243         LASSERT(ergo(result == 0,
4244                      dt_object_exists(dt) && !dt_object_remote(dt)));
4245         LINVRNT(osd_invariant(obj));
4246         RETURN(result);
4247 }
4248
4249 static int osd_declare_ref_add(const struct lu_env *env, struct dt_object *dt,
4250                                struct thandle *handle)
4251 {
4252         struct osd_thandle *oh;
4253         int rc;
4254
4255         /* it's possible that object doesn't exist yet */
4256         LASSERT(handle != NULL);
4257
4258         oh = container_of(handle, struct osd_thandle, ot_super);
4259         LASSERT(oh->ot_handle == NULL);
4260
4261         osd_trans_declare_op(env, oh, OSD_OT_REF_ADD,
4262                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
4263
4264         rc = osd_idc_find_and_init(env, osd_dev(dt->do_lu.lo_dev),
4265                                    osd_dt_obj(dt));
4266
4267         return rc;
4268 }
4269
4270 /*
4271  * Concurrency: @dt is write locked.
4272  */
4273 static int osd_ref_add(const struct lu_env *env, struct dt_object *dt,
4274                        struct thandle *th)
4275 {
4276         struct osd_object *obj = osd_dt_obj(dt);
4277         struct inode *inode = obj->oo_inode;
4278         struct osd_thandle *oh;
4279         int rc = 0;
4280
4281         if (!dt_object_exists(dt) || obj->oo_destroyed)
4282                 return -ENOENT;
4283
4284         LINVRNT(osd_invariant(obj));
4285         LASSERT(!dt_object_remote(dt));
4286         LASSERT(osd_is_write_locked(env, obj));
4287         LASSERT(th != NULL);
4288
4289         oh = container_of(th, struct osd_thandle, ot_super);
4290         LASSERT(oh->ot_handle != NULL);
4291
4292         osd_trans_exec_op(env, th, OSD_OT_REF_ADD);
4293
4294         CDEBUG(D_INODE, DFID" increase nlink %d\n",
4295                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
4296         /*
4297          * The DIR_NLINK feature allows directories to exceed LDISKFS_LINK_MAX
4298          * (65000) subdirectories by storing "1" in i_nlink if the link count
4299          * would otherwise overflow. Directory tranversal tools understand
4300          * that (st_nlink == 1) indicates that the filesystem dose not track
4301          * hard links count on the directory, and will not abort subdirectory
4302          * scanning early once (st_nlink - 2) subdirs have been found.
4303          *
4304          * This also has to properly handle the case of inodes with nlink == 0
4305          * in case they are being linked into the PENDING directory
4306          */
4307         spin_lock(&obj->oo_guard);
4308         if (unlikely(inode->i_nlink == 0))
4309                 /* inc_nlink from 0 may cause WARN_ON */
4310                 set_nlink(inode, 1);
4311         else {
4312                 ldiskfs_inc_count(oh->ot_handle, inode);
4313                 if (!S_ISDIR(inode->i_mode))
4314                         LASSERT(inode->i_nlink <= LDISKFS_LINK_MAX);
4315         }
4316         spin_unlock(&obj->oo_guard);
4317
4318         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4319         LINVRNT(osd_invariant(obj));
4320
4321         osd_trans_exec_check(env, th, OSD_OT_REF_ADD);
4322
4323         return rc;
4324 }
4325
4326 static int osd_declare_ref_del(const struct lu_env *env, struct dt_object *dt,
4327                                struct thandle *handle)
4328 {
4329         struct osd_thandle *oh;
4330
4331         if (!dt_object_exists(dt))
4332                 return -ENOENT;
4333
4334         LASSERT(!dt_object_remote(dt));
4335         LASSERT(handle != NULL);
4336
4337         oh = container_of(handle, struct osd_thandle, ot_super);
4338         LASSERT(oh->ot_handle == NULL);
4339
4340         osd_trans_declare_op(env, oh, OSD_OT_REF_DEL,
4341                              osd_dto_credits_noquota[DTO_ATTR_SET_BASE]);
4342
4343         return 0;
4344 }
4345
4346 /*
4347  * Concurrency: @dt is write locked.
4348  */
4349 static int osd_ref_del(const struct lu_env *env, struct dt_object *dt,
4350                        struct thandle *th)
4351 {
4352         struct osd_object *obj = osd_dt_obj(dt);
4353         struct inode *inode = obj->oo_inode;
4354         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
4355         struct osd_thandle *oh;
4356
4357         if (!dt_object_exists(dt))
4358                 return -ENOENT;
4359
4360         LINVRNT(osd_invariant(obj));
4361         LASSERT(!dt_object_remote(dt));
4362         LASSERT(osd_is_write_locked(env, obj));
4363         LASSERT(th != NULL);
4364
4365         if (OBD_FAIL_CHECK(OBD_FAIL_OSD_REF_DEL))
4366                 return -EIO;
4367
4368         oh = container_of(th, struct osd_thandle, ot_super);
4369         LASSERT(oh->ot_handle != NULL);
4370
4371         osd_trans_exec_op(env, th, OSD_OT_REF_DEL);
4372
4373         spin_lock(&obj->oo_guard);
4374         /*
4375          * That can be result of upgrade from old Lustre version and
4376          * applied only to local files.  Just skip this ref_del call.
4377          * ext4_unlink() only treats this as a warning, don't LASSERT here.
4378          */
4379         if (inode->i_nlink == 0) {
4380                 CDEBUG_LIMIT(fid_is_norm(lu_object_fid(&dt->do_lu)) ?
4381                              D_ERROR : D_INODE, "%s: nlink == 0 on "DFID
4382                              ", maybe an upgraded file? (LU-3915)\n",
4383                              osd_name(osd), PFID(lu_object_fid(&dt->do_lu)));
4384                 spin_unlock(&obj->oo_guard);
4385                 return 0;
4386         }
4387
4388         CDEBUG(D_INODE, DFID" decrease nlink %d\n",
4389                PFID(lu_object_fid(&dt->do_lu)), inode->i_nlink);
4390
4391         ldiskfs_dec_count(oh->ot_handle, inode);
4392         spin_unlock(&obj->oo_guard);
4393
4394         osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4395         LINVRNT(osd_invariant(obj));
4396
4397         osd_trans_exec_check(env, th, OSD_OT_REF_DEL);
4398
4399         return 0;
4400 }
4401
4402 /*
4403  * Concurrency: @dt is read locked.
4404  */
4405 static int osd_xattr_get(const struct lu_env *env, struct dt_object *dt,
4406                          struct lu_buf *buf, const char *name)
4407 {
4408         struct osd_object      *obj    = osd_dt_obj(dt);
4409         struct inode           *inode  = obj->oo_inode;
4410         struct osd_thread_info *info   = osd_oti_get(env);
4411         struct dentry          *dentry = &info->oti_obj_dentry;
4412         bool cache_xattr = false;
4413         int rc;
4414
4415         LASSERT(buf);
4416
4417         /* version get is not real XATTR but uses xattr API */
4418         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4419                 dt_obj_version_t *ver = buf->lb_buf;
4420
4421                 /*
4422                  * for version we are just using xattr API but change inode
4423                  * field instead
4424                  */
4425                 if (buf->lb_len == 0)
4426                         return sizeof(dt_obj_version_t);
4427
4428                 if (buf->lb_len < sizeof(dt_obj_version_t))
4429                         return -ERANGE;
4430
4431                 CDEBUG(D_INODE, "Get version %#llx for inode %lu\n",
4432                        LDISKFS_I(inode)->i_fs_version, inode->i_ino);
4433
4434                 *ver = LDISKFS_I(inode)->i_fs_version;
4435
4436                 return sizeof(dt_obj_version_t);
4437         }
4438
4439         if (!dt_object_exists(dt))
4440                 return -ENOENT;
4441
4442         LASSERT(!dt_object_remote(dt));
4443         LASSERT(inode->i_op != NULL);
4444 #ifdef HAVE_IOP_XATTR
4445         LASSERT(inode->i_op->getxattr != NULL);
4446 #endif
4447
4448         if (strcmp(name, XATTR_NAME_LOV) == 0 ||
4449             strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0)
4450                 cache_xattr = true;
4451
4452         if (cache_xattr) {
4453                 rc = osd_oxc_get(obj, name, buf);
4454                 if (rc != -ENOENT)
4455                         return rc;
4456         }
4457
4458         if (strcmp(name, XATTR_NAME_FID) == 0 && obj->oo_pfid_in_lma) {
4459                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4460                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
4461                 struct filter_fid *ff;
4462                 struct ost_layout *ol;
4463
4464                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4465                 if (rc)
4466                         return rc;
4467
4468                 LASSERT(lma->lma_compat & LMAC_STRIPE_INFO);
4469
4470                 rc = sizeof(*ff);
4471                 if (buf->lb_len == 0 || !buf->lb_buf)
4472                         return rc;
4473
4474                 if (buf->lb_len < rc)
4475                         return -ERANGE;
4476
4477                 ff = buf->lb_buf;
4478                 ol = &ff->ff_layout;
4479                 ol->ol_stripe_count = cpu_to_le32(loa->loa_parent_fid.f_ver >>
4480                                                   PFID_STRIPE_IDX_BITS);
4481                 ol->ol_stripe_size = cpu_to_le32(loa->loa_stripe_size);
4482                 loa->loa_parent_fid.f_ver &= PFID_STRIPE_COUNT_MASK;
4483                 fid_cpu_to_le(&ff->ff_parent, &loa->loa_parent_fid);
4484                 if (lma->lma_compat & LMAC_COMP_INFO) {
4485                         ol->ol_comp_start = cpu_to_le64(loa->loa_comp_start);
4486                         ol->ol_comp_end = cpu_to_le64(loa->loa_comp_end);
4487                         ol->ol_comp_id = cpu_to_le32(loa->loa_comp_id);
4488                 } else {
4489                         ol->ol_comp_start = 0;
4490                         ol->ol_comp_end = 0;
4491                         ol->ol_comp_id = 0;
4492                 }
4493         } else {
4494                 /* Get enc context xattr directly from ldiskfs instead of going
4495                  * through the VFS, as there is no xattr handler for
4496                  * "encryption.".
4497                  */
4498                 if (strcmp(name, LL_XATTR_NAME_ENCRYPTION_CONTEXT) == 0)
4499                         rc = ldiskfs_xattr_get(inode,
4500                                           LDISKFS_XATTR_INDEX_ENCRYPTION,
4501                                           LDISKFS_XATTR_NAME_ENCRYPTION_CONTEXT,
4502                                           buf->lb_buf, buf->lb_len);
4503                 else
4504                         rc = __osd_xattr_get(inode, dentry, name,
4505                                              buf->lb_buf, buf->lb_len);
4506         }
4507
4508         if (cache_xattr) {
4509                 if (rc == -ENOENT || rc == -ENODATA)
4510                         osd_oxc_add(obj, name, NULL, 0);
4511                 else if (rc > 0 && buf->lb_buf != NULL)
4512                         osd_oxc_add(obj, name, buf->lb_buf, rc);
4513         }
4514
4515         return rc;
4516 }
4517
4518 static int osd_declare_xattr_set(const struct lu_env *env,
4519                                  struct dt_object *dt,
4520                                  const struct lu_buf *buf, const char *name,
4521                                  int fl, struct thandle *handle)
4522 {
4523         struct osd_thandle *oh;
4524         int credits = 0;
4525         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4526
4527         LASSERT(handle != NULL);
4528
4529         oh = container_of(handle, struct osd_thandle, ot_super);
4530         LASSERT(oh->ot_handle == NULL);
4531
4532         if (strcmp(name, XATTR_NAME_LMA) == 0) {
4533                 /*
4534                  * For non-upgrading case, the LMA is set first and
4535                  * usually fit inode. But for upgrade case, the LMA
4536                  * may be in another separated EA block.
4537                  */
4538                 if (dt_object_exists(dt)) {
4539                         if (fl == LU_XATTR_REPLACE)
4540                                 credits = 1;
4541                         else
4542                                 goto upgrade;
4543                 }
4544         } else if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4545                 credits = 1;
4546         } else if (strcmp(name, XATTR_NAME_FID) == 0) {
4547                 /* We may need to delete the old PFID EA. */
4548                 credits = LDISKFS_MAXQUOTAS_DEL_BLOCKS(sb);
4549                 if (fl == LU_XATTR_REPLACE)
4550                         credits += 1;
4551                 else
4552                         goto upgrade;
4553         } else {
4554                 /*
4555                  * If some name entry resides on remote MDT, then will create
4556                  * agent entry under remote parent. On the other hand, if the
4557                  * remote entry will be removed, then related agent entry may
4558                  * need to be removed from the remote parent. So there may be
4559                  * kinds of cases, let's declare enough credits. The credits
4560                  * for create agent entry is enough for remove case.
4561                  */
4562                 if (strcmp(name, XATTR_NAME_LINK) == 0) {
4563                         credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
4564                         if (dt_object_exists(dt))
4565                                 credits += 1; /* For updating LMA */
4566                 }
4567
4568 upgrade:
4569                 credits += osd_dto_credits_noquota[DTO_XATTR_SET];
4570
4571                 if (buf != NULL) {
4572                         ssize_t buflen;
4573
4574                         if (buf->lb_buf == NULL && dt_object_exists(dt)) {
4575                                 /*
4576                                  * learn xattr size from osd_xattr_get if
4577                                  * attribute has not been read yet
4578                                  */
4579                                 buflen = __osd_xattr_get(
4580                                     osd_dt_obj(dt)->oo_inode,
4581                                     &osd_oti_get(env)->oti_obj_dentry,
4582                                     name, NULL, 0);
4583                                 if (buflen < 0)
4584                                         buflen = 0;
4585                         } else {
4586                                 buflen = buf->lb_len;
4587                         }
4588
4589                         if (buflen > sb->s_blocksize) {
4590                                 credits += osd_calc_bkmap_credits(
4591                                     sb, NULL, 0, -1,
4592                                     (buflen + sb->s_blocksize - 1) >>
4593                                     sb->s_blocksize_bits);
4594                         }
4595                 }
4596                 /*
4597                  * xattr set may involve inode quota change, reserve credits for
4598                  * dquot_initialize()
4599                  */
4600                 credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4601         }
4602
4603         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET, credits);
4604
4605         return 0;
4606 }
4607
4608 static int osd_xattr_set_pfid(const struct lu_env *env, struct osd_object *obj,
4609                               const struct lu_buf *buf, int fl,
4610                               struct thandle *handle)
4611 {
4612         struct osd_thread_info *info = osd_oti_get(env);
4613         struct dentry *dentry = &info->oti_obj_dentry;
4614         struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4615         struct lustre_mdt_attrs *lma = &loa->loa_lma;
4616         struct inode *inode = obj->oo_inode;
4617         struct filter_fid *ff = buf->lb_buf;
4618         struct ost_layout *ol = &ff->ff_layout;
4619         int flags = XATTR_REPLACE;
4620         int rc;
4621
4622         ENTRY;
4623
4624         if (buf->lb_len != sizeof(*ff) && buf->lb_len != sizeof(struct lu_fid))
4625                 RETURN(-EINVAL);
4626
4627         rc = osd_get_lma(info, inode, dentry, loa);
4628         if (rc == -ENODATA) {
4629                 /* Usually for upgarding from old device */
4630                 lustre_loa_init(loa, lu_object_fid(&obj->oo_dt.do_lu),
4631                                 LMAC_FID_ON_OST, 0);
4632                 flags = XATTR_CREATE;
4633         } else if (rc) {
4634                 RETURN(rc);
4635         }
4636
4637         if (!rc && lma->lma_compat & LMAC_STRIPE_INFO) {
4638                 if ((fl & LU_XATTR_CREATE) && !(fl & LU_XATTR_REPLACE))
4639                         RETURN(-EEXIST);
4640
4641                 if (LDISKFS_INODE_SIZE(inode->i_sb) > 256) {
4642                         /* Separate PFID EA from LMA */
4643                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4644                         lustre_lma_swab(lma);
4645                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4646                                              sizeof(*lma), XATTR_REPLACE);
4647                         if (!rc) {
4648                                 obj->oo_pfid_in_lma = 0;
4649                                 rc = LU_XATTR_CREATE;
4650                         }
4651
4652                         RETURN(rc);
4653                 }
4654         } else {
4655                 if (LDISKFS_INODE_SIZE(inode->i_sb) > 256)
4656                         RETURN(fl);
4657
4658                 /*
4659                  * Old client does not send stripe information,
4660                  * then store the PFID EA on disk separatedly.
4661                  */
4662                 if (unlikely(buf->lb_len == sizeof(struct lu_fid) ||
4663                              ol->ol_stripe_size == 0))
4664                         RETURN(fl);
4665
4666                 /* Remove old PFID EA entry firstly. */
4667                 dquot_initialize(inode);
4668                 rc = ll_vfs_removexattr(dentry, inode, XATTR_NAME_FID);
4669                 if (rc == -ENODATA) {
4670                         /* XATTR_NAME_FID is already absent */
4671                         rc = 0;
4672                 } else if (rc) {
4673                         RETURN(rc);
4674                 }
4675         }
4676
4677         fid_le_to_cpu(&loa->loa_parent_fid, &ff->ff_parent);
4678         if (likely(ol->ol_stripe_size != 0)) {
4679                 loa->loa_parent_fid.f_ver |= le32_to_cpu(ol->ol_stripe_count) <<
4680                                              PFID_STRIPE_IDX_BITS;
4681                 loa->loa_stripe_size = le32_to_cpu(ol->ol_stripe_size);
4682                 lma->lma_compat |= LMAC_STRIPE_INFO;
4683                 if (ol->ol_comp_id != 0) {
4684                         loa->loa_comp_id = le32_to_cpu(ol->ol_comp_id);
4685                         loa->loa_comp_start = le64_to_cpu(ol->ol_comp_start);
4686                         loa->loa_comp_end = le64_to_cpu(ol->ol_comp_end);
4687                         lma->lma_compat |= LMAC_COMP_INFO;
4688                 }
4689         }
4690
4691         lustre_loa_swab(loa, false);
4692
4693         /* Store the PFID EA inside LMA. */
4694         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, loa, sizeof(*loa),
4695                              flags);
4696         if (!rc)
4697                 obj->oo_pfid_in_lma = 1;
4698
4699         RETURN(rc);
4700 }
4701
4702 /*
4703  * In DNE environment, the object (in spite of regular file or directory)
4704  * and its name entry may reside on different MDTs. Under such case, we will
4705  * create an agent entry on the MDT where the object resides. The agent entry
4706  * references the object locally, that makes the object to be visible to the
4707  * userspace when mounted as 'ldiskfs' directly. Then the userspace tools,
4708  * such as 'tar' can handle the object properly.
4709  *
4710  * We handle the agent entry during set linkEA that is the common interface
4711  * for both regular file and directroy, can handle kinds of cases, such as
4712  * create/link/unlink/rename, and so on.
4713  *
4714  * NOTE: we can NOT do that when ea_{insert,delete} that is only for directory.
4715  *
4716  * XXX: There are two known issues:
4717  * 1. For one object, we will create at most one agent entry even if there
4718  *    may be more than one cross-MDTs hard links on the object. So the local
4719  *    e2fsck may claim that the object's nlink is larger than the name entries
4720  *    that reference such inode. And in further, the e2fsck will fix the nlink
4721  *    attribute to match the local references. Then it will cause the object's
4722  *    nlink attribute to be inconsistent with the global references. it is bad
4723  *    but not fatal. The ref_del() can handle the zero-referenced case. On the
4724  *    other hand, the global namespace LFSCK can repair the object's attribute
4725  *    according to the linkEA.
4726  * 2. There may be too many hard links on the object as to its linkEA overflow,
4727  *    then the linkEA entry for cross-MDTs reference may be discarded. If such
4728  *    case happened, then at this point, we do not know whether there are some
4729  *    cross-MDTs reference. But there are local references, it guarantees that
4730  *    object is visible to userspace when mounted as 'ldiskfs'. That is enough.
4731  */
4732 static int osd_xattr_handle_linkea(const struct lu_env *env,
4733                                    struct osd_device *osd,
4734                                    struct osd_object *obj,
4735                                    const struct lu_buf *buf,
4736                                    struct thandle *handle)
4737 {
4738         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
4739         struct lu_fid *tfid = &osd_oti_get(env)->oti_fid3;
4740         struct linkea_data ldata = { .ld_buf = (struct lu_buf *)buf };
4741         struct lu_name tmpname;
4742         struct osd_thandle *oh;
4743         int rc;
4744         bool remote = false;
4745
4746         ENTRY;
4747
4748         oh = container_of(handle, struct osd_thandle, ot_super);
4749         LASSERT(oh->ot_handle != NULL);
4750
4751         rc = linkea_init_with_rec(&ldata);
4752         if (!rc) {
4753                 linkea_first_entry(&ldata);
4754                 while (ldata.ld_lee != NULL && !remote) {
4755                         linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen,
4756                                             &tmpname, tfid);
4757                         if (osd_remote_fid(env, osd, tfid) > 0)
4758                                 remote = true;
4759                         else
4760                                 linkea_next_entry(&ldata);
4761                 }
4762         } else if (rc == -ENODATA) {
4763                 rc = 0;
4764         } else {
4765                 RETURN(rc);
4766         }
4767
4768         if (lu_object_has_agent_entry(&obj->oo_dt.do_lu) && !remote) {
4769                 rc = osd_delete_from_remote_parent(env, osd, obj, oh, false);
4770                 if (rc)
4771                         CERROR("%s: failed to remove agent entry for "DFID
4772                                ": rc = %d\n", osd_name(osd), PFID(fid), rc);
4773         } else if (!lu_object_has_agent_entry(&obj->oo_dt.do_lu) && remote) {
4774                 rc = osd_add_to_remote_parent(env, osd, obj, oh);
4775                 if (rc)
4776                         CERROR("%s: failed to create agent entry for "DFID
4777                                ": rc = %d\n", osd_name(osd), PFID(fid), rc);
4778         }
4779
4780         RETURN(rc);
4781 }
4782
4783 /*
4784  * Concurrency: @dt is write locked.
4785  */
4786 static int osd_xattr_set(const struct lu_env *env, struct dt_object *dt,
4787                          const struct lu_buf *buf, const char *name, int fl,
4788                          struct thandle *handle)
4789 {
4790         struct osd_object *obj = osd_dt_obj(dt);
4791         struct osd_device *osd = osd_obj2dev(obj);
4792         struct inode *inode = obj->oo_inode;
4793         struct osd_thread_info *info = osd_oti_get(env);
4794         int fs_flags = 0;
4795         int len;
4796         int rc;
4797
4798         ENTRY;
4799
4800         LASSERT(handle);
4801         LASSERT(buf);
4802
4803         /* version set is not real XATTR */
4804         if (strcmp(name, XATTR_NAME_VERSION) == 0) {
4805                 dt_obj_version_t *version = buf->lb_buf;
4806
4807                 /*
4808                  * for version we are just using xattr API but change inode
4809                  * field instead
4810                  */
4811                 LASSERT(buf->lb_len == sizeof(dt_obj_version_t));
4812
4813                 CDEBUG(D_INODE, "Set version %#llx (old %#llx) for inode %lu\n",
4814                        *version, LDISKFS_I(inode)->i_fs_version, inode->i_ino);
4815
4816                 LDISKFS_I(inode)->i_fs_version = *version;
4817                 /*
4818                  * Version is set after all inode operations are finished,
4819                  * so we should mark it dirty here
4820                  */
4821                 osd_dirty_inode(inode, I_DIRTY_DATASYNC);
4822
4823                 RETURN(0);
4824         }
4825
4826         CDEBUG(D_INODE, DFID" set xattr '%s' with size %zu\n",
4827                PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
4828
4829         len = buf->lb_len;
4830         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4831
4832         /*
4833          * For the OST device with 256 bytes inode size by default,
4834          * the PFID EA will be stored together with LMA EA to avoid
4835          * performance trouble. Otherwise the PFID EA can be stored
4836          * independently. LU-8998
4837          */
4838         if (strcmp(name, XATTR_NAME_FID) == 0 && osd->od_is_ost &&
4839             (LDISKFS_INODE_SIZE(inode->i_sb) <= 256 || obj->oo_pfid_in_lma)) {
4840                 LASSERT(buf->lb_buf);
4841
4842                 fl = osd_xattr_set_pfid(env, obj, buf, fl, handle);
4843                 if (fl <= 0)
4844                         RETURN(fl);
4845         } else if (strcmp(name, XATTR_NAME_LMV) == 0) {
4846                 struct lustre_ost_attrs *loa = &info->oti_ost_attrs;
4847                 struct lustre_mdt_attrs *lma = &loa->loa_lma;
4848
4849                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry, loa);
4850                 if (rc)
4851                         RETURN(rc);
4852
4853                 lma->lma_incompat |= LMAI_STRIPED;
4854                 lustre_lma_swab(lma);
4855                 rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4856                                      sizeof(*lma), XATTR_REPLACE);
4857                 if (rc != 0)
4858                         RETURN(rc);
4859         } else if (strcmp(name, XATTR_NAME_LINK) == 0) {
4860                 LASSERT(!osd->od_is_ost);
4861
4862                 rc = osd_xattr_handle_linkea(env, osd, obj, buf, handle);
4863                 if (rc)
4864                         RETURN(rc);
4865         }
4866
4867         if (fl & LU_XATTR_REPLACE)
4868                 fs_flags |= XATTR_REPLACE;
4869
4870         if (fl & LU_XATTR_CREATE)
4871                 fs_flags |= XATTR_CREATE;
4872
4873         if (strcmp(name, LL_XATTR_NAME_ENCRYPTION_CONTEXT) == 0) {
4874                 /* Set enc context xattr directly in ldiskfs instead of going
4875                  * through the VFS, as there is no xattr handler for
4876                  * "encryption.".
4877                  */
4878                 struct osd_thandle *oth = container_of(handle,
4879                                                        struct osd_thandle,
4880                                                        ot_super);
4881
4882                 if (!oth->ot_handle)
4883                         /* this should be already part of a transaction */
4884                         RETURN(-EPROTO);
4885
4886                 rc = ldiskfs_xattr_set_handle(oth->ot_handle, inode,
4887                                           LDISKFS_XATTR_INDEX_ENCRYPTION,
4888                                           LDISKFS_XATTR_NAME_ENCRYPTION_CONTEXT,
4889                                           buf->lb_buf, len, fs_flags);
4890         } else {
4891                 rc = __osd_xattr_set(info, inode, name,
4892                                      buf->lb_buf, len, fs_flags);
4893         }
4894         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4895
4896         if (rc == 0 &&
4897             (strcmp(name, XATTR_NAME_LOV) == 0 ||
4898              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
4899                 osd_oxc_add(obj, name, buf->lb_buf, buf->lb_len);
4900
4901         return rc;
4902 }
4903
4904 /*
4905  * Concurrency: @dt is read locked.
4906  */
4907 static int osd_xattr_list(const struct lu_env *env, struct dt_object *dt,
4908                           const struct lu_buf *buf)
4909 {
4910         struct osd_object *obj = osd_dt_obj(dt);
4911         struct inode *inode = obj->oo_inode;
4912         struct osd_thread_info *info = osd_oti_get(env);
4913         struct dentry *dentry = &info->oti_obj_dentry;
4914
4915         if (!dt_object_exists(dt))
4916                 return -ENOENT;
4917
4918         LASSERT(!dt_object_remote(dt));
4919         LASSERT(inode->i_op != NULL);
4920         LASSERT(inode->i_op->listxattr != NULL);
4921
4922         dentry->d_inode = inode;
4923         dentry->d_sb = inode->i_sb;
4924         return inode->i_op->listxattr(dentry, buf->lb_buf, buf->lb_len);
4925 }
4926
4927 static int osd_declare_xattr_del(const struct lu_env *env,
4928                                  struct dt_object *dt, const char *name,
4929                                  struct thandle *handle)
4930 {
4931         struct osd_thandle *oh;
4932         struct super_block *sb = osd_sb(osd_dev(dt->do_lu.lo_dev));
4933
4934         LASSERT(!dt_object_remote(dt));
4935         LASSERT(handle != NULL);
4936
4937         oh = container_of(handle, struct osd_thandle, ot_super);
4938         LASSERT(oh->ot_handle == NULL);
4939
4940         osd_trans_declare_op(env, oh, OSD_OT_XATTR_SET,
4941                              osd_dto_credits_noquota[DTO_XATTR_SET]);
4942         /*
4943          * xattr del may involve inode quota change, reserve credits for
4944          * dquot_initialize()
4945          */
4946         oh->ot_credits += LDISKFS_MAXQUOTAS_INIT_BLOCKS(sb);
4947
4948         return 0;
4949 }
4950
4951 /*
4952  * Concurrency: @dt is write locked.
4953  */
4954 static int osd_xattr_del(const struct lu_env *env, struct dt_object *dt,
4955                          const char *name, struct thandle *handle)
4956 {
4957         struct osd_object *obj = osd_dt_obj(dt);
4958         struct inode *inode = obj->oo_inode;
4959         struct osd_thread_info *info = osd_oti_get(env);
4960         struct dentry *dentry = &info->oti_obj_dentry;
4961         int rc;
4962
4963         if (!dt_object_exists(dt))
4964                 return -ENOENT;
4965
4966         LASSERT(!dt_object_remote(dt));
4967         LASSERT(inode->i_op != NULL);
4968         LASSERT(handle != NULL);
4969 #ifdef HAVE_IOP_XATTR
4970         LASSERT(inode->i_op->removexattr != NULL);
4971 #endif
4972
4973         osd_trans_exec_op(env, handle, OSD_OT_XATTR_SET);
4974
4975         if (strcmp(name, XATTR_NAME_FID) == 0 && obj->oo_pfid_in_lma) {
4976                 struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
4977
4978                 rc = osd_get_lma(info, inode, &info->oti_obj_dentry,
4979                                  &info->oti_ost_attrs);
4980                 if (!rc) {
4981                         LASSERT(lma->lma_compat & LMAC_STRIPE_INFO);
4982
4983                         lma->lma_compat &= ~(LMAC_STRIPE_INFO | LMAC_COMP_INFO);
4984                         lustre_lma_swab(lma);
4985                         rc = __osd_xattr_set(info, inode, XATTR_NAME_LMA, lma,
4986                                              sizeof(*lma), XATTR_REPLACE);
4987                         if (!rc)
4988                                 obj->oo_pfid_in_lma = 0;
4989                 }
4990         } else {
4991                 dquot_initialize(inode);
4992                 dentry->d_inode = inode;
4993                 dentry->d_sb = inode->i_sb;
4994                 rc = ll_vfs_removexattr(dentry, inode, name);
4995         }
4996
4997         osd_trans_exec_check(env, handle, OSD_OT_XATTR_SET);
4998
4999         if (rc == 0 &&
5000             (strcmp(name, XATTR_NAME_LOV) == 0 ||
5001              strcmp(name, XATTR_NAME_DEFAULT_LMV) == 0))
5002                 osd_oxc_del(obj, name);
5003
5004         return rc;
5005 }
5006
5007 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
5008                            __u64 start, __u64 end)
5009 {
5010         struct osd_object *obj = osd_dt_obj(dt);
5011         struct osd_device *dev = osd_obj2dev(obj);
5012         struct inode *inode = obj->oo_inode;
5013         struct file *file;
5014         int rc;
5015
5016         ENTRY;
5017         file = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
5018                                  inode->i_fop);
5019         if (IS_ERR(file))
5020                 RETURN(PTR_ERR(file));
5021
5022         file->f_mode |= FMODE_64BITHASH;
5023         rc = vfs_fsync_range(file, start, end, 0);
5024         ihold(inode);
5025         fput(file);
5026
5027         RETURN(rc);
5028 }
5029
5030 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
5031 {
5032         return 0;
5033 }
5034
5035 static bool osd_check_stale(struct dt_object *dt)
5036 {
5037         return false;
5038 }
5039 /*
5040  * Index operations.
5041  */
5042
5043 static int osd_iam_index_probe(const struct lu_env *env, struct osd_object *o,
5044                                const struct dt_index_features *feat)
5045 {
5046         struct iam_descr *descr;
5047
5048         if (osd_object_is_root(o))
5049                 return feat == &dt_directory_features;
5050
5051         LASSERT(o->oo_dir != NULL);
5052
5053         descr = o->oo_dir->od_container.ic_descr;
5054         if (feat == &dt_directory_features) {
5055                 if (descr->id_rec_size == sizeof(struct osd_fid_pack))
5056                         return 1;
5057                 else
5058                         return 0;
5059         } else {
5060                 return feat->dif_keysize_min <= descr->id_key_size &&
5061                        descr->id_key_size <= feat->dif_keysize_max &&
5062                        feat->dif_recsize_min <= descr->id_rec_size &&
5063                        descr->id_rec_size <= feat->dif_recsize_max &&
5064                        !(feat->dif_flags & (DT_IND_VARKEY |
5065                                             DT_IND_VARREC | DT_IND_NONUNQ)) &&
5066                        ergo(feat->dif_flags & DT_IND_UPDATE,
5067                             1 /* XXX check that object (and fs) is writable */);
5068         }
5069 }
5070
5071 static int osd_iam_container_init(const struct lu_env *env,
5072                                   struct osd_object *obj,
5073                                   struct osd_directory *dir)
5074 {
5075         struct iam_container *bag = &dir->od_container;
5076         int result;
5077
5078         result = iam_container_init(bag, &dir->od_descr, obj->oo_inode);
5079         if (result != 0)
5080                 return result;
5081
5082         result = iam_container_setup(bag);
5083         if (result == 0)
5084                 obj->oo_dt.do_index_ops = &osd_index_iam_ops;
5085         else
5086                 iam_container_fini(bag);
5087
5088         return result;
5089 }
5090
5091
5092 /*
5093  * Concurrency: no external locking is necessary.
5094  */
5095 static int osd_index_try(const struct lu_env *env, struct dt_object *dt,
5096                          const struct dt_index_features *feat)
5097 {
5098         int result;
5099         int skip_iam = 0;
5100         struct osd_object *obj = osd_dt_obj(dt);
5101
5102         LINVRNT(osd_invariant(obj));
5103
5104         if (osd_object_is_root(obj)) {
5105                 dt->do_index_ops = &osd_index_ea_ops;
5106                 result = 0;
5107         } else if (feat == &dt_directory_features) {
5108                 dt->do_index_ops = &osd_index_ea_ops;
5109                 if (obj->oo_inode == NULL || S_ISDIR(obj->oo_inode->i_mode))
5110                         result = 0;
5111                 else
5112                         result = -ENOTDIR;
5113                 skip_iam = 1;
5114         } else if (unlikely(feat == &dt_otable_features)) {
5115                 dt->do_index_ops = &osd_otable_ops;
5116                 return 0;
5117         } else if (unlikely(feat == &dt_acct_features)) {
5118                 dt->do_index_ops = &osd_acct_index_ops;
5119                 result = 0;
5120                 skip_iam = 1;
5121         } else if (!osd_has_index(obj)) {
5122                 struct osd_directory *dir;
5123                 struct osd_device *osd = osd_obj2dev(obj);
5124                 const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
5125
5126                 OBD_ALLOC_PTR(dir);
5127                 if (dir) {
5128
5129                         spin_lock(&obj->oo_guard);
5130                         if (obj->oo_dir == NULL)
5131                                 obj->oo_dir = dir;
5132                         else
5133                                 /*
5134                                  * Concurrent thread allocated container data.
5135                                  */
5136                                 OBD_FREE_PTR(dir);
5137                         spin_unlock(&obj->oo_guard);
5138                         /*
5139                          * Now, that we have container data, serialize its
5140                          * initialization.
5141                          */
5142                         down_write(&obj->oo_ext_idx_sem);
5143                         /*
5144                          * recheck under lock.
5145                          */
5146
5147                         if (osd_has_index(obj)) {
5148                                 result = 0;
5149                                 goto unlock;
5150                         }
5151
5152                         result = osd_iam_container_init(env, obj, obj->oo_dir);
5153                         if (result || feat == &dt_lfsck_namespace_features ||
5154                             feat == &dt_lfsck_layout_orphan_features ||
5155                             feat == &dt_lfsck_layout_dangling_features)
5156                                 goto unlock;
5157
5158                         result = osd_index_register(osd, fid,
5159                                                     feat->dif_keysize_max,
5160                                                     feat->dif_recsize_max);
5161                         if (result < 0)
5162                                 CWARN("%s: failed to register index "
5163                                       DFID": rc = %d\n",
5164                                       osd_name(osd), PFID(fid), result);
5165                         else if (result > 0)
5166                                 result = 0;
5167                         else
5168                                 CDEBUG(D_LFSCK, "%s: index object "DFID
5169                                        " (%d/%d) registered\n",
5170                                        osd_name(osd), PFID(fid),
5171                                        (int)feat->dif_keysize_max,
5172                                        (int)feat->dif_recsize_max);
5173
5174 unlock:
5175                         up_write(&obj->oo_ext_idx_sem);
5176                 } else {
5177                         result = -ENOMEM;
5178                 }
5179         } else {
5180                 result = 0;
5181         }
5182
5183         if (result == 0 && skip_iam == 0) {
5184                 if (!osd_iam_index_probe(env, obj, feat))
5185                         result = -ENOTDIR;
5186         }
5187         LINVRNT(osd_invariant(obj));
5188
5189         return result;
5190 }
5191
5192 static int osd_otable_it_attr_get(const struct lu_env *env,
5193                                  struct dt_object *dt,
5194                                  struct lu_attr *attr)
5195 {
5196         attr->la_valid = 0;
5197         return 0;
5198 }
5199
5200 static const struct dt_object_operations osd_obj_ops = {
5201         .do_read_lock           = osd_read_lock,
5202         .do_write_lock          = osd_write_lock,
5203         .do_read_unlock         = osd_read_unlock,
5204         .do_write_unlock        = osd_write_unlock,
5205         .do_write_locked        = osd_write_locked,
5206         .do_attr_get            = osd_attr_get,
5207         .do_declare_attr_set    = osd_declare_attr_set,
5208         .do_attr_set            = osd_attr_set,
5209         .do_ah_init             = osd_ah_init,
5210         .do_declare_create      = osd_declare_create,
5211         .do_create              = osd_create,
5212         .do_declare_destroy     = osd_declare_destroy,
5213         .do_destroy             = osd_destroy,
5214         .do_index_try           = osd_index_try,
5215         .do_declare_ref_add     = osd_declare_ref_add,
5216         .do_ref_add             = osd_ref_add,
5217         .do_declare_ref_del     = osd_declare_ref_del,
5218         .do_ref_del             = osd_ref_del,
5219         .do_xattr_get           = osd_xattr_get,
5220         .do_declare_xattr_set   = osd_declare_xattr_set,
5221         .do_xattr_set           = osd_xattr_set,
5222         .do_declare_xattr_del   = osd_declare_xattr_del,
5223         .do_xattr_del           = osd_xattr_del,
5224         .do_xattr_list          = osd_xattr_list,
5225         .do_object_sync         = osd_object_sync,
5226         .do_invalidate          = osd_invalidate,
5227         .do_check_stale         = osd_check_stale,
5228 };
5229
5230 static const struct dt_object_operations osd_obj_otable_it_ops = {
5231         .do_attr_get    = osd_otable_it_attr_get,
5232         .do_index_try   = osd_index_try,
5233 };
5234
5235 static int osd_index_declare_iam_delete(const struct lu_env *env,
5236                                         struct dt_object *dt,
5237                                         const struct dt_key *key,
5238                                         struct thandle *handle)
5239 {
5240         struct osd_thandle *oh;
5241
5242         oh = container_of(handle, struct osd_thandle, ot_super);
5243         LASSERT(oh->ot_handle == NULL);
5244
5245         /* Recycle  may cause additional three blocks to be changed. */
5246         osd_trans_declare_op(env, oh, OSD_OT_DELETE,
5247                              osd_dto_credits_noquota[DTO_INDEX_DELETE] + 3);
5248
5249         return 0;
5250 }
5251
5252 /**
5253  *      delete a (key, value) pair from index \a dt specified by \a key
5254  *
5255  *      \param  dt      osd index object
5256  *      \param  key     key for index
5257  *      \param  rec     record reference
5258  *      \param  handle  transaction handler
5259  *
5260  *      \retval  0  success
5261  *      \retval -ve   failure
5262  */
5263 static int osd_index_iam_delete(const struct lu_env *env, struct dt_object *dt,
5264                                 const struct dt_key *key,
5265                                 struct thandle *handle)
5266 {
5267         struct osd_thread_info *oti = osd_oti_get(env);
5268         struct osd_object *obj = osd_dt_obj(dt);
5269         struct osd_thandle *oh;
5270         struct iam_path_descr *ipd;
5271         struct iam_container *bag = &obj->oo_dir->od_container;
5272         int rc;
5273
5274         ENTRY;
5275
5276         if (!dt_object_exists(dt))
5277                 RETURN(-ENOENT);
5278
5279         LINVRNT(osd_invariant(obj));
5280         LASSERT(!dt_object_remote(dt));
5281         LASSERT(bag->ic_object == obj->oo_inode);
5282         LASSERT(handle != NULL);
5283
5284         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
5285
5286         ipd = osd_idx_ipd_get(env, bag);
5287         if (unlikely(ipd == NULL))
5288                 RETURN(-ENOMEM);
5289
5290         oh = container_of(handle, struct osd_thandle, ot_super);
5291         LASSERT(oh->ot_handle != NULL);
5292         LASSERT(oh->ot_handle->h_transaction != NULL);
5293
5294         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5295                 /* swab quota uid/gid provided by caller */
5296                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5297                 key = (const struct dt_key *)&oti->oti_quota_id;
5298         }
5299
5300         rc = iam_delete(oh->ot_handle, bag, (const struct iam_key *)key, ipd);
5301         osd_ipd_put(env, bag, ipd);
5302         LINVRNT(osd_invariant(obj));
5303         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
5304         RETURN(rc);
5305 }
5306
5307 static int osd_index_declare_ea_delete(const struct lu_env *env,
5308                                        struct dt_object *dt,
5309                                        const struct dt_key *key,
5310                                        struct thandle *handle)
5311 {
5312         struct osd_thandle *oh;
5313         struct inode *inode;
5314         int rc, credits;
5315
5316         ENTRY;
5317
5318         LASSERT(!dt_object_remote(dt));
5319         LASSERT(handle != NULL);
5320
5321         oh = container_of(handle, struct osd_thandle, ot_super);
5322         LASSERT(oh->ot_handle == NULL);
5323
5324         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE];
5325         osd_trans_declare_op(env, oh, OSD_OT_DELETE, credits);
5326
5327         inode = osd_dt_obj(dt)->oo_inode;
5328         if (inode == NULL)
5329                 RETURN(-ENOENT);
5330
5331         rc = osd_declare_inode_qid(env, i_uid_read(inode), i_gid_read(inode),
5332                                    i_projid_read(inode), 0, oh, osd_dt_obj(dt),
5333                                    NULL, OSD_QID_BLK);
5334         RETURN(rc);
5335 }
5336
5337 static inline int osd_get_fid_from_dentry(struct ldiskfs_dir_entry_2 *de,
5338                                           struct dt_rec *fid)
5339 {
5340         struct osd_fid_pack *rec;
5341         int rc = -ENODATA;
5342
5343         if (de->file_type & LDISKFS_DIRENT_LUFID) {
5344                 rec = (struct osd_fid_pack *)(de->name + de->name_len + 1);
5345                 rc = osd_fid_unpack((struct lu_fid *)fid, rec);
5346                 if (rc == 0 && unlikely(!fid_is_sane((struct lu_fid *)fid)))
5347                         rc = -EINVAL;
5348         }
5349         return rc;
5350 }
5351
5352 static int osd_remote_fid(const struct lu_env *env, struct osd_device *osd,
5353                           const struct lu_fid *fid)
5354 {
5355         struct seq_server_site *ss = osd_seq_site(osd);
5356
5357         ENTRY;
5358
5359         /* FID seqs not in FLDB, must be local seq */
5360         if (unlikely(!fid_seq_in_fldb(fid_seq(fid))))
5361                 RETURN(0);
5362
5363         /*
5364          * If FLD is not being initialized yet, it only happens during the
5365          * initialization, likely during mgs initialization, and we assume
5366          * this is local FID.
5367          */
5368         if (ss == NULL || ss->ss_server_fld == NULL)
5369                 RETURN(0);
5370
5371         /* Only check the local FLDB here */
5372         if (osd_seq_exists(env, osd, fid_seq(fid)))
5373                 RETURN(0);
5374
5375         RETURN(1);
5376 }
5377
5378 static void osd_take_care_of_agent(const struct lu_env *env,
5379                                    struct osd_device *osd,
5380                                    struct osd_thandle *oh,
5381                                    struct ldiskfs_dir_entry_2 *de)
5382 {
5383         struct lu_fid *fid = &osd_oti_get(env)->oti_fid;
5384         struct osd_idmap_cache *idc;
5385         int rc, schedule = 0;
5386
5387         LASSERT(de != NULL);
5388
5389         rc = osd_get_fid_from_dentry(de, (struct dt_rec *)fid);
5390         if (likely(rc == 0)) {
5391                 idc = osd_idc_find_or_init(env, osd, fid);
5392                 if (IS_ERR(idc) || idc->oic_remote)
5393                         schedule = 1;
5394         } else if (rc == -ENODATA) {
5395                 /*
5396                  * can't get FID, postpone to the end of the
5397                  * transaction when iget() is safe
5398                  */
5399                 schedule = 1;
5400         } else {
5401                 CERROR("%s: can't get FID: rc = %d\n", osd_name(osd), rc);
5402         }
5403         if (schedule)
5404                 osd_schedule_agent_inode_removal(env, oh,
5405                                                  le32_to_cpu(de->inode));
5406 }
5407
5408 /**
5409  * Utility function to get real name from object name
5410  *
5411  * \param[in] obj      pointer to the object to be handled
5412  * \param[in] name     object name
5413  * \param[in] len      object name len
5414  * \param[out]ln       pointer to the struct lu_name to hold the real name
5415  *
5416  * If file is not encrypted, real name is just the object name.
5417  * If file is encrypted, object name needs to be decoded. In
5418  * this case a new buffer is allocated, and ln->ln_name needs to be freed by
5419  * the caller.
5420  *
5421  * \retval   0, on success
5422  * \retval -ve, on error
5423  */
5424 static int obj_name2lu_name(struct osd_object *obj, const char *name,
5425                             int len, struct lu_name *ln)
5426 {
5427         struct lu_fid namefid;
5428
5429         fid_zero(&namefid);
5430
5431         if (name[0] == '[')
5432                 sscanf(name + 1, SFID, RFID(&namefid));
5433
5434         if (fid_is_sane(&namefid) || name_is_dot_or_dotdot(name, len) ||
5435             !(obj->oo_lma_flags & LUSTRE_ENCRYPT_FL)) {
5436                 ln->ln_name = name;
5437                 ln->ln_namelen = len;
5438         } else {
5439                 char *buf = kmalloc(len, GFP_NOFS);
5440
5441                 if (!buf)
5442                         return -ENOMEM;
5443
5444                 len = critical_decode(name, len, buf);
5445                 ln->ln_name = buf;
5446                 ln->ln_namelen = len;
5447         }
5448
5449         return 0;
5450 }
5451
5452 /**
5453  * Index delete function for interoperability mode (b11826).
5454  * It will remove the directory entry added by osd_index_ea_insert().
5455  * This entry is needed to maintain name->fid mapping.
5456  *
5457  * \param key,  key i.e. file entry to be deleted
5458  *
5459  * \retval   0, on success
5460  * \retval -ve, on error
5461  */
5462 static int osd_index_ea_delete(const struct lu_env *env, struct dt_object *dt,
5463                                const struct dt_key *key, struct thandle *handle)
5464 {
5465         struct osd_object *obj = osd_dt_obj(dt);
5466         struct inode *dir = obj->oo_inode;
5467         struct dentry *dentry;
5468         struct osd_thandle *oh;
5469         struct ldiskfs_dir_entry_2 *de = NULL;
5470         struct buffer_head *bh;
5471         struct htree_lock *hlock = NULL;
5472         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
5473         struct lu_name ln;
5474         int rc;
5475
5476         ENTRY;
5477
5478         if (!dt_object_exists(dt))
5479                 RETURN(-ENOENT);
5480
5481         LINVRNT(osd_invariant(obj));
5482         LASSERT(!dt_object_remote(dt));
5483         LASSERT(handle != NULL);
5484
5485         rc = obj_name2lu_name(obj, (char *)key, strlen((char *)key), &ln);
5486         if (rc)
5487                 RETURN(rc);
5488
5489         osd_trans_exec_op(env, handle, OSD_OT_DELETE);
5490
5491         oh = container_of(handle, struct osd_thandle, ot_super);
5492         LASSERT(oh->ot_handle != NULL);
5493         LASSERT(oh->ot_handle->h_transaction != NULL);
5494
5495         dquot_initialize(dir);
5496         dentry = osd_child_dentry_get(env, obj, ln.ln_name, ln.ln_namelen);
5497
5498         if (obj->oo_hl_head != NULL) {
5499                 hlock = osd_oti_get(env)->oti_hlock;
5500                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
5501                                    dir, LDISKFS_HLOCK_DEL);
5502         } else {
5503                 down_write(&obj->oo_ext_idx_sem);
5504         }
5505
5506         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
5507         if (!IS_ERR(bh)) {
5508                 /*
5509                  * If this is not the ".." entry, it might be a remote DNE
5510                  * entry and  we need to check if the FID is for a remote
5511                  * MDT.  If the FID is  not in the directory entry (e.g.
5512                  * upgraded 1.8 filesystem without dirdata enabled) then
5513                  * we need to get the FID from the LMA. For a remote directory
5514                  * there HAS to be an LMA, it cannot be an IGIF inode in this
5515                  * case.
5516                  *
5517                  * Delete the entry before the agent inode in order to
5518                  * simplify error handling.  At worst an error after deleting
5519                  * the entry first might leak the agent inode afterward. The
5520                  * reverse would need filesystem abort in case of error deleting
5521                  * the entry after the agent had been removed, or leave a
5522                  * dangling entry pointing at a random inode.
5523                  */
5524                 if (strcmp((char *)key, dotdot) != 0)
5525                         osd_take_care_of_agent(env, osd, oh, de);
5526                 rc = ldiskfs_delete_entry(oh->ot_handle, dir, de, bh);
5527                 brelse(bh);
5528         } else {
5529                 rc = PTR_ERR(bh);
5530         }
5531
5532         if (!rc && fid_is_namespace_visible(lu_object_fid(&dt->do_lu)) &&
5533             obj->oo_dirent_count != LU_DIRENT_COUNT_UNSET) {
5534                 /* NB, dirent count may not be accurate, because it's counted
5535                  * without lock.
5536                  */
5537                 if (obj->oo_dirent_count)
5538                         obj->oo_dirent_count--;
5539                 else
5540                         obj->oo_dirent_count = LU_DIRENT_COUNT_UNSET;
5541         }
5542         if (hlock != NULL)
5543                 ldiskfs_htree_unlock(hlock);
5544         else
5545                 up_write(&obj->oo_ext_idx_sem);
5546         GOTO(out, rc);
5547 out:
5548         LASSERT(osd_invariant(obj));
5549         osd_trans_exec_check(env, handle, OSD_OT_DELETE);
5550         if (ln.ln_name != (char *)key)
5551                 kfree(ln.ln_name);
5552         RETURN(rc);
5553 }
5554
5555 /**
5556  *      Lookup index for \a key and copy record to \a rec.
5557  *
5558  *      \param  dt      osd index object
5559  *      \param  key     key for index
5560  *      \param  rec     record reference
5561  *
5562  *      \retval  +ve  success : exact mach
5563  *      \retval  0    return record with key not greater than \a key
5564  *      \retval -ve   failure
5565  */
5566 static int osd_index_iam_lookup(const struct lu_env *env, struct dt_object *dt,
5567                                 struct dt_rec *rec, const struct dt_key *key)
5568 {
5569         struct osd_object *obj = osd_dt_obj(dt);
5570         struct iam_path_descr *ipd;
5571         struct iam_container *bag = &obj->oo_dir->od_container;
5572         struct osd_thread_info *oti = osd_oti_get(env);
5573         struct iam_iterator *it = &oti->oti_idx_it;
5574         struct iam_rec *iam_rec;
5575         int rc;
5576
5577         ENTRY;
5578
5579         if (!dt_object_exists(dt))
5580                 RETURN(-ENOENT);
5581
5582         LASSERT(osd_invariant(obj));
5583         LASSERT(!dt_object_remote(dt));
5584         LASSERT(bag->ic_object == obj->oo_inode);
5585
5586         ipd = osd_idx_ipd_get(env, bag);
5587         if (IS_ERR(ipd))
5588                 RETURN(-ENOMEM);
5589
5590         /* got ipd now we can start iterator. */
5591         iam_it_init(it, bag, 0, ipd);
5592
5593         if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5594                 /* swab quota uid/gid provided by caller */
5595                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5596                 key = (const struct dt_key *)&oti->oti_quota_id;
5597         }
5598
5599         rc = iam_it_get(it, (struct iam_key *)key);
5600         if (rc >= 0) {
5601                 if (S_ISDIR(obj->oo_inode->i_mode))
5602                         iam_rec = (struct iam_rec *)oti->oti_ldp;
5603                 else
5604                         iam_rec = (struct iam_rec *)rec;
5605
5606                 iam_reccpy(&it->ii_path.ip_leaf, (struct iam_rec *)iam_rec);
5607
5608                 if (S_ISDIR(obj->oo_inode->i_mode))
5609                         osd_fid_unpack((struct lu_fid *)rec,
5610                                        (struct osd_fid_pack *)iam_rec);
5611                 else if (fid_is_quota(lu_object_fid(&dt->do_lu)))
5612                         osd_quota_unpack(obj, rec);
5613         }
5614
5615         iam_it_put(it);
5616         iam_it_fini(it);
5617         osd_ipd_put(env, bag, ipd);
5618
5619         LINVRNT(osd_invariant(obj));
5620
5621         RETURN(rc);
5622 }
5623
5624 static int osd_index_declare_iam_insert(const struct lu_env *env,
5625                                         struct dt_object *dt,
5626                                         const struct dt_rec *rec,
5627                                         const struct dt_key *key,
5628                                         struct thandle *handle)
5629 {
5630         struct osd_thandle *oh;
5631
5632         LASSERT(handle != NULL);
5633
5634         oh = container_of(handle, struct osd_thandle, ot_super);
5635         LASSERT(oh->ot_handle == NULL);
5636
5637         osd_trans_declare_op(env, oh, OSD_OT_INSERT,
5638                              osd_dto_credits_noquota[DTO_INDEX_INSERT]);
5639
5640         return 0;
5641 }
5642
5643 /**
5644  *      Inserts (key, value) pair in \a dt index object.
5645  *
5646  *      \param  dt      osd index object
5647  *      \param  key     key for index
5648  *      \param  rec     record reference
5649  *      \param  th      transaction handler
5650  *
5651  *      \retval  0  success
5652  *      \retval -ve failure
5653  */
5654 static int osd_index_iam_insert(const struct lu_env *env, struct dt_object *dt,
5655                                 const struct dt_rec *rec,
5656                                 const struct dt_key *key, struct thandle *th)
5657 {
5658         struct osd_object *obj = osd_dt_obj(dt);
5659         struct iam_path_descr *ipd;
5660         struct osd_thandle *oh;
5661         struct iam_container *bag;
5662         struct osd_thread_info *oti = osd_oti_get(env);
5663         struct iam_rec *iam_rec;
5664         int rc;
5665
5666         ENTRY;
5667
5668         if (!dt_object_exists(dt))
5669                 RETURN(-ENOENT);
5670
5671         LINVRNT(osd_invariant(obj));
5672         LASSERT(!dt_object_remote(dt));
5673
5674         bag = &obj->oo_dir->od_container;
5675         LASSERT(bag->ic_object == obj->oo_inode);
5676         LASSERT(th != NULL);
5677
5678         osd_trans_exec_op(env, th, OSD_OT_INSERT);
5679
5680         ipd = osd_idx_ipd_get(env, bag);
5681         if (unlikely(ipd == NULL))
5682                 RETURN(-ENOMEM);
5683
5684         oh = container_of(th, struct osd_thandle, ot_super);
5685         LASSERT(oh->ot_handle != NULL);
5686         LASSERT(oh->ot_handle->h_transaction != NULL);
5687         if (S_ISDIR(obj->oo_inode->i_mode)) {
5688                 iam_rec = (struct iam_rec *)oti->oti_ldp;
5689                 osd_fid_pack((struct osd_fid_pack *)iam_rec, rec,
5690                              &oti->oti_fid);
5691         } else if (fid_is_quota(lu_object_fid(&dt->do_lu))) {
5692                 /* pack quota uid/gid */
5693                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
5694                 key = (const struct dt_key *)&oti->oti_quota_id;
5695                 /* pack quota record */
5696                 rec = osd_quota_pack(obj, rec, &oti->oti_quota_rec);
5697                 iam_rec = (struct iam_rec *)rec;
5698         } else {
5699                 iam_rec = (struct iam_rec *)rec;
5700         }
5701
5702         rc = iam_insert(oh->ot_handle, bag, (const struct iam_key *)key,
5703                         iam_rec, ipd);
5704         osd_ipd_put(env, bag, ipd);
5705         LINVRNT(osd_invariant(obj));
5706         osd_trans_exec_check(env, th, OSD_OT_INSERT);
5707         RETURN(rc);
5708 }
5709
5710 /**
5711  * Calls ldiskfs_add_entry() to add directory entry
5712  * into the directory. This is required for
5713  * interoperability mode (b11826)
5714  *
5715  * \retval   0, on success
5716  * \retval -ve, on error
5717  */
5718 static int __osd_ea_add_rec(struct osd_thread_info *info,
5719                             struct osd_object *pobj, struct inode  *cinode,
5720                             const char *name, const struct lu_fid *fid,
5721                             struct htree_lock *hlock, struct thandle *th)
5722 {
5723         struct ldiskfs_dentry_param *ldp;
5724         struct dentry *child;
5725         struct osd_thandle *oth;
5726         struct lu_name ln;
5727         int rc;
5728
5729         oth = container_of(th, struct osd_thandle, ot_super);
5730         LASSERT(oth->ot_handle != NULL);
5731         LASSERT(oth->ot_handle->h_transaction != NULL);
5732         LASSERT(pobj->oo_inode);
5733
5734         rc = obj_name2lu_name(pobj, name, strlen(name), &ln);
5735         if (rc)
5736                 RETURN(rc);
5737
5738         ldp = (struct ldiskfs_dentry_param *)info->oti_ldp;
5739         if (unlikely(osd_object_is_root(pobj)))
5740                 ldp->edp_magic = 0;
5741         else
5742                 osd_get_ldiskfs_dirent_param(ldp, fid);
5743         child = osd_child_dentry_get(info->oti_env, pobj,
5744                                      ln.ln_name, ln.ln_namelen);
5745         child->d_fsdata = (void *)ldp;
5746         dquot_initialize(pobj->oo_inode);
5747         rc = osd_ldiskfs_add_entry(info, osd_obj2dev(pobj), oth->ot_handle,
5748                                    child, cinode, hlock);
5749         if (rc == 0 && OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_TYPE)) {
5750                 struct ldiskfs_dir_entry_2      *de;
5751                 struct buffer_head              *bh;
5752                 int                              rc1;
5753
5754                 bh = osd_ldiskfs_find_entry(pobj->oo_inode, &child->d_name, &de,
5755                                             NULL, hlock);
5756                 if (!IS_ERR(bh)) {
5757                         rc1 = ldiskfs_journal_get_write_access(oth->ot_handle,
5758                                                                bh);
5759                         if (rc1 == 0) {
5760                                 if (S_ISDIR(cinode->i_mode))
5761                                         de->file_type = LDISKFS_DIRENT_LUFID |
5762                                                         LDISKFS_FT_REG_FILE;
5763                                 else
5764                                         de->file_type = LDISKFS_DIRENT_LUFID |
5765                                                         LDISKFS_FT_DIR;
5766                                 ldiskfs_handle_dirty_metadata(oth->ot_handle,
5767                                                               NULL, bh);
5768                         }
5769                         brelse(bh);
5770                 }
5771         }
5772
5773         if (ln.ln_name != name)
5774                 kfree(ln.ln_name);
5775         RETURN(rc);
5776 }
5777
5778 /**
5779  * Calls ldiskfs_add_dot_dotdot() to add dot and dotdot entries
5780  * into the directory.Also sets flags into osd object to
5781  * indicate dot and dotdot are created. This is required for
5782  * interoperability mode (b11826)
5783  *
5784  * \param dir   directory for dot and dotdot fixup.
5785  * \param obj   child object for linking
5786  *
5787  * \retval   0, on success
5788  * \retval -ve, on error
5789  */
5790 static int osd_add_dot_dotdot(struct osd_thread_info *info,
5791                               struct osd_object *dir,
5792                               struct inode *parent_dir, const char *name,
5793                               const struct lu_fid *dot_fid,
5794                               const struct lu_fid *dot_dot_fid,
5795                               struct thandle *th)
5796 {
5797         struct inode *inode = dir->oo_inode;
5798         struct osd_thandle *oth;
5799         int result = 0;
5800
5801         oth = container_of(th, struct osd_thandle, ot_super);
5802         LASSERT(oth->ot_handle->h_transaction != NULL);
5803         LASSERT(S_ISDIR(dir->oo_inode->i_mode));
5804
5805         if (strcmp(name, dot) == 0) {
5806                 if (dir->oo_compat_dot_created) {
5807                         result = -EEXIST;
5808                 } else {
5809                         LASSERT(inode->i_ino == parent_dir->i_ino);
5810                         dir->oo_compat_dot_created = 1;
5811                         result = 0;
5812                 }
5813         } else if (strcmp(name, dotdot) == 0) {
5814                 if (!dir->oo_compat_dot_created)
5815                         return -EINVAL;
5816                 /* in case of rename, dotdot is already created */
5817                 if (dir->oo_compat_dotdot_created) {
5818                         return __osd_ea_add_rec(info, dir, parent_dir, name,
5819                                                 dot_dot_fid, NULL, th);
5820                 }
5821
5822                 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_PARENT)) {
5823                         struct lu_fid tfid = *dot_dot_fid;
5824
5825                         tfid.f_oid--;
5826                         result = osd_add_dot_dotdot_internal(info,
5827                                         dir->oo_inode, parent_dir, dot_fid,
5828                                         &tfid, oth);
5829                 } else {
5830                         result = osd_add_dot_dotdot_internal(info,
5831                                         dir->oo_inode, parent_dir, dot_fid,
5832                                         dot_dot_fid, oth);
5833                 }
5834
5835                 if (result == 0)
5836                         dir->oo_compat_dotdot_created = 1;
5837         }
5838
5839         return result;
5840 }
5841
5842
5843 /**
5844  * It will call the appropriate osd_add* function and return the
5845  * value, return by respective functions.
5846  */
5847 static int osd_ea_add_rec(const struct lu_env *env, struct osd_object *pobj,
5848                           struct inode *cinode, const char *name,
5849                           const struct lu_fid *fid, struct thandle *th)
5850 {
5851         struct osd_thread_info *info = osd_oti_get(env);
5852         struct htree_lock *hlock;
5853         int rc;
5854
5855         hlock = pobj->oo_hl_head != NULL ? info->oti_hlock : NULL;
5856
5857         if (name[0] == '.' && (name[1] == '\0' ||
5858                                (name[1] == '.' && name[2] == '\0'))) {
5859                 if (hlock != NULL) {
5860                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
5861                                            pobj->oo_inode, 0);
5862                 } else {
5863                         down_write(&pobj->oo_ext_idx_sem);
5864                 }
5865
5866                 rc = osd_add_dot_dotdot(info, pobj, cinode, name,
5867                                         lu_object_fid(&pobj->oo_dt.do_lu),
5868                                         fid, th);
5869         } else {
5870                 if (hlock != NULL) {
5871                         ldiskfs_htree_lock(hlock, pobj->oo_hl_head,
5872                                            pobj->oo_inode, LDISKFS_HLOCK_ADD);
5873                 } else {
5874                         down_write(&pobj->oo_ext_idx_sem);
5875                 }
5876
5877                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_INDIR)) {
5878                         struct lu_fid *tfid = &info->oti_fid;
5879
5880                         *tfid = *fid;
5881                         tfid->f_ver = ~0;
5882                         rc = __osd_ea_add_rec(info, pobj, cinode, name,
5883                                               tfid, hlock, th);
5884                 } else {
5885                         rc = __osd_ea_add_rec(info, pobj, cinode, name, fid,
5886                                               hlock, th);
5887                 }
5888         }
5889         if (!rc && fid_is_namespace_visible(lu_object_fid(&pobj->oo_dt.do_lu))
5890             && pobj->oo_dirent_count != LU_DIRENT_COUNT_UNSET)
5891                 pobj->oo_dirent_count++;
5892
5893         if (hlock != NULL)
5894                 ldiskfs_htree_unlock(hlock);
5895         else
5896                 up_write(&pobj->oo_ext_idx_sem);
5897
5898         return rc;
5899 }
5900
5901 static int
5902 osd_ldiskfs_consistency_check(struct osd_thread_info *oti,
5903                               struct osd_device *dev,
5904                               const struct lu_fid *fid,
5905                               struct osd_inode_id *id)
5906 {
5907         struct lustre_scrub *scrub = &dev->od_scrub.os_scrub;
5908         struct inode *inode = NULL;
5909         int once = 0;
5910         bool insert;
5911         int rc;
5912
5913         ENTRY;
5914         if (!scrub_needs_check(scrub, fid, id->oii_ino))
5915                 RETURN(0);
5916 again:
5917         rc = osd_oi_lookup(oti, dev, fid, &oti->oti_id, 0);
5918         if (rc == -ENOENT) {
5919                 __u32 gen = id->oii_gen;
5920
5921                 insert = true;
5922                 if (inode != NULL)
5923                         goto trigger;
5924
5925                 inode = osd_iget(oti, dev, id);
5926                 /* The inode has been removed (by race maybe). */
5927                 if (IS_ERR(inode)) {
5928                         rc = PTR_ERR(inode);
5929
5930                         RETURN(rc == -ESTALE ? -ENOENT : rc);
5931                 }
5932
5933                 /* The OI mapping is lost. */
5934                 if (gen != OSD_OII_NOGEN)
5935                         goto trigger;
5936
5937                 /*
5938                  * The inode may has been reused by others, we do not know,
5939                  * leave it to be handled by subsequent osd_fid_lookup().
5940                  */
5941                 GOTO(out, rc = 0);
5942         } else if (rc || osd_id_eq(id, &oti->oti_id)) {
5943                 GOTO(out, rc);
5944         }
5945
5946         insert = false;
5947
5948 trigger:
5949         if (scrub->os_running) {
5950                 if (inode == NULL) {
5951                         inode = osd_iget(oti, dev, id);
5952                         /* The inode has been removed (by race maybe). */
5953                         if (IS_ERR(inode)) {
5954                                 rc = PTR_ERR(inode);
5955
5956                                 RETURN(rc == -ESTALE ? -ENOENT : rc);
5957                         }
5958                 }
5959
5960                 rc = osd_oii_insert(dev, fid, id, insert);
5961                 /*
5962                  * There is race condition between osd_oi_lookup and OI scrub.
5963                  * The OI scrub finished just after osd_oi_lookup() failure.
5964                  * Under such case, it is unnecessary to trigger OI scrub again,
5965                  * but try to call osd_oi_lookup() again.
5966                  */
5967                 if (unlikely(rc == -EAGAIN))
5968                         goto again;
5969
5970                 if (!S_ISDIR(inode->i_mode))
5971                         rc = 0;
5972                 else
5973                         rc = osd_check_lmv(oti, dev, inode);
5974
5975                 GOTO(out, rc);
5976         }
5977
5978         if (dev->od_scrub.os_scrub.os_auto_scrub_interval != AS_NEVER &&
5979             ++once == 1) {
5980                 rc = osd_scrub_start(oti->oti_env, dev, SS_AUTO_PARTIAL |
5981                                      SS_CLEAR_DRYRUN | SS_CLEAR_FAILOUT);
5982                 CDEBUG_LIMIT(D_LFSCK | D_CONSOLE | D_WARNING,
5983                              "%s: trigger partial OI scrub for RPC inconsistency, checking FID "DFID"/%u: rc = %d\n",
5984                              osd_dev2name(dev), PFID(fid), id->oii_ino, rc);
5985                 if (rc == 0 || rc == -EALREADY)
5986                         goto again;
5987         }
5988
5989         GOTO(out, rc);
5990
5991 out:
5992         iput(inode);
5993
5994         RETURN(rc);
5995 }
5996
5997 static int osd_fail_fid_lookup(struct osd_thread_info *oti,
5998                                struct osd_device *dev,
5999                                struct lu_fid *fid, __u32 ino)
6000 {
6001         struct lustre_ost_attrs *loa = &oti->oti_ost_attrs;
6002         struct osd_idmap_cache *oic = &oti->oti_cache;
6003         struct inode *inode;
6004         int rc;
6005
6006         osd_id_gen(&oic->oic_lid, ino, OSD_OII_NOGEN);
6007         inode = osd_iget(oti, dev, &oic->oic_lid);
6008         if (IS_ERR(inode)) {
6009                 fid_zero(&oic->oic_fid);
6010                 return PTR_ERR(inode);
6011         }
6012
6013         rc = osd_get_lma(oti, inode, &oti->oti_obj_dentry, loa);
6014         iput(inode);
6015         if (rc != 0)
6016                 fid_zero(&oic->oic_fid);
6017         else
6018                 *fid = oic->oic_fid = loa->loa_lma.lma_self_fid;
6019         return rc;
6020 }
6021
6022 void osd_add_oi_cache(struct osd_thread_info *info, struct osd_device *osd,
6023                       struct osd_inode_id *id, const struct lu_fid *fid)
6024 {
6025         CDEBUG(D_INODE, "add "DFID" %u:%u to info %p\n", PFID(fid),
6026                id->oii_ino, id->oii_gen, info);
6027         info->oti_cache.oic_lid = *id;
6028         info->oti_cache.oic_fid = *fid;
6029         info->oti_cache.oic_dev = osd;
6030 }
6031
6032 /**
6033  * Get parent FID from the linkEA.
6034  *
6035  * For a directory which parent resides on remote MDT, to satisfy the
6036  * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
6037  * the other hand, to make the lookup(..) on the directory can return
6038  * the real parent FID, we append the real parent FID after its ".."
6039  * name entry in the /REMOTE_PARENT_DIR.
6040  *
6041  * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
6042  * backup. So after the restore, we cannot get the right parent FID from
6043  * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
6044  * we have stored the real parent FID in the directory object's linkEA,
6045  * we can parse the linkEA for the real parent FID.
6046  *
6047  * \param[in] env       pointer to the thread context
6048  * \param[in] obj       pointer to the object to be handled
6049  * \param[out]fid       pointer to the buffer to hold the parent FID
6050  *
6051  * \retval              0 for getting the real parent FID successfully
6052  * \retval              negative error number on failure
6053  */
6054 static int osd_get_pfid_from_linkea(const struct lu_env *env,
6055                                     struct osd_object *obj,
6056                                     struct lu_fid *fid)
6057 {
6058         struct osd_thread_info *oti = osd_oti_get(env);
6059         struct lu_buf *buf = &oti->oti_big_buf;
6060         struct dentry *dentry = &oti->oti_obj_dentry;
6061         struct inode *inode = obj->oo_inode;
6062         struct linkea_data ldata = { NULL };
6063         int rc;
6064
6065         ENTRY;
6066
6067         fid_zero(fid);
6068         if (!S_ISDIR(inode->i_mode))
6069                 RETURN(-EIO);
6070
6071 again:
6072         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
6073                              buf->lb_buf, buf->lb_len);
6074         if (rc == -ERANGE) {
6075                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
6076                                      NULL, 0);
6077                 if (rc > 0) {
6078                         lu_buf_realloc(buf, rc);
6079                         if (buf->lb_buf == NULL)
6080                                 RETURN(-ENOMEM);
6081
6082                         goto again;
6083                 }
6084         }
6085
6086         if (unlikely(rc == 0))
6087                 RETURN(-ENODATA);
6088
6089         if (rc < 0)
6090                 RETURN(rc);
6091
6092         if (unlikely(buf->lb_buf == NULL)) {
6093                 lu_buf_realloc(buf, rc);
6094                 if (buf->lb_buf == NULL)
6095                         RETURN(-ENOMEM);
6096
6097                 goto again;
6098         }
6099
6100         ldata.ld_buf = buf;
6101         rc = linkea_init_with_rec(&ldata);
6102         if (!rc) {
6103                 linkea_first_entry(&ldata);
6104                 linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
6105         }
6106
6107         RETURN(rc);
6108 }
6109
6110 static int osd_verify_ent_by_linkea(const struct lu_env *env,
6111                                     struct inode *inode,
6112                                     const struct lu_fid *pfid,
6113                                     const char *name, const int namelen)
6114 {
6115         struct osd_thread_info *oti = osd_oti_get(env);
6116         struct lu_buf *buf = &oti->oti_big_buf;
6117         struct dentry *dentry = &oti->oti_obj_dentry;
6118         struct linkea_data ldata = { NULL };
6119         struct lu_name cname = { .ln_name = name,
6120                                  .ln_namelen = namelen };
6121         int rc;
6122
6123         ENTRY;
6124
6125 again:
6126         rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
6127                              buf->lb_buf, buf->lb_len);
6128         if (rc == -ERANGE)
6129                 rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK, NULL, 0);
6130
6131         if (rc < 0)
6132                 RETURN(rc);
6133
6134         if (unlikely(rc == 0))
6135                 RETURN(-ENODATA);
6136
6137         if (buf->lb_len < rc) {
6138                 lu_buf_realloc(buf, rc);
6139                 if (buf->lb_buf == NULL)
6140                         RETURN(-ENOMEM);
6141
6142                 goto again;
6143         }
6144
6145         ldata.ld_buf = buf;
6146         rc = linkea_init_with_rec(&ldata);
6147         if (!rc)
6148                 rc = linkea_links_find(&ldata, &cname, pfid);
6149
6150         RETURN(rc);
6151 }
6152
6153 /**
6154  * Calls ->lookup() to find dentry. From dentry get inode and
6155  * read inode's ea to get fid. This is required for  interoperability
6156  * mode (b11826)
6157  *
6158  * \retval   0, on success
6159  * \retval -ve, on error
6160  */
6161 static int osd_ea_lookup_rec(const struct lu_env *env, struct osd_object *obj,
6162                              struct dt_rec *rec, const struct dt_key *key)
6163 {
6164         struct inode *dir = obj->oo_inode;
6165         struct dentry *dentry;
6166         struct ldiskfs_dir_entry_2 *de;
6167         struct buffer_head *bh;
6168         struct lu_fid *fid = (struct lu_fid *)rec;
6169         struct htree_lock *hlock = NULL;
6170         struct lu_name ln;
6171         int ino;
6172         int rc;
6173
6174         ENTRY;
6175
6176         LASSERT(dir->i_op != NULL);
6177         LASSERT(dir->i_op->lookup != NULL);
6178
6179         rc = obj_name2lu_name(obj, (char *)key, strlen((char *)key), &ln);
6180         if (rc)
6181                 RETURN(rc);
6182
6183         dentry = osd_child_dentry_get(env, obj, ln.ln_name, ln.ln_namelen);
6184
6185         if (obj->oo_hl_head != NULL) {
6186                 hlock = osd_oti_get(env)->oti_hlock;
6187                 ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6188                                    dir, LDISKFS_HLOCK_LOOKUP);
6189         } else {
6190                 down_read(&obj->oo_ext_idx_sem);
6191         }
6192
6193         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
6194         if (!IS_ERR(bh)) {
6195                 struct osd_thread_info *oti = osd_oti_get(env);
6196                 struct osd_inode_id *id = &oti->oti_id;
6197                 struct osd_device *dev = osd_obj2dev(obj);
6198
6199                 ino = le32_to_cpu(de->inode);
6200                 if (OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP)) {
6201                         brelse(bh);
6202                         rc = osd_fail_fid_lookup(oti, dev, fid, ino);
6203                         GOTO(out, rc);
6204                 }
6205
6206                 rc = osd_get_fid_from_dentry(de, rec);
6207
6208                 /* done with de, release bh */
6209                 brelse(bh);
6210                 if (rc != 0) {
6211                         if (unlikely(is_remote_parent_ino(dev, ino))) {
6212                                 const char *name = (const char *)key;
6213
6214                                 /*
6215                                  * If the parent is on remote MDT, and there
6216                                  * is no FID-in-dirent, then we have to get
6217                                  * the parent FID from the linkEA.
6218                                  */
6219                                 if (likely(strlen(name) == 2 &&
6220                                            name[0] == '.' && name[1] == '.'))
6221                                         rc = osd_get_pfid_from_linkea(env, obj,
6222                                                                       fid);
6223                         } else {
6224                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
6225                         }
6226                 } else {
6227                         osd_id_gen(id, ino, OSD_OII_NOGEN);
6228                 }
6229
6230                 if (rc != 0 || osd_remote_fid(env, dev, fid))
6231                         GOTO(out, rc);
6232
6233                 rc = osd_ldiskfs_consistency_check(oti, dev, fid, id);
6234                 if (rc != -ENOENT) {
6235                         /* Other error should not affect lookup result. */
6236                         rc = 0;
6237
6238                         /* Normal file mapping should be added into OI cache
6239                          * after FID in LMA check, but for local files like
6240                          * hsm_actions, their FIDs are not stored in OI files,
6241                          * see osd_initial_OI_scrub(), and here is the only
6242                          * place to load mapping into OI cache.
6243                          */
6244                         if (!fid_is_namespace_visible(fid))
6245                                 osd_add_oi_cache(osd_oti_get(env),
6246                                                  osd_obj2dev(obj), id, fid);
6247                 }
6248         } else {
6249                 rc = PTR_ERR(bh);
6250         }
6251
6252         GOTO(out, rc);
6253
6254 out:
6255         if (hlock != NULL)
6256                 ldiskfs_htree_unlock(hlock);
6257         else
6258                 up_read(&obj->oo_ext_idx_sem);
6259         if (ln.ln_name != (char *)key)
6260                 kfree(ln.ln_name);
6261         RETURN(rc);
6262 }
6263
6264 static int osd_index_declare_ea_insert(const struct lu_env *env,
6265                                        struct dt_object *dt,
6266                                        const struct dt_rec *rec,
6267                                        const struct dt_key *key,
6268                                        struct thandle *handle)
6269 {
6270         struct osd_thandle *oh;
6271         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
6272         struct dt_insert_rec *rec1 = (struct dt_insert_rec *)rec;
6273         const struct lu_fid *fid = rec1->rec_fid;
6274         int credits, rc = 0;
6275         struct osd_idmap_cache *idc;
6276
6277         ENTRY;
6278
6279         LASSERT(!dt_object_remote(dt));
6280         LASSERT(handle != NULL);
6281         LASSERT(fid != NULL);
6282         LASSERT(rec1->rec_type != 0);
6283
6284         oh = container_of(handle, struct osd_thandle, ot_super);
6285         LASSERT(oh->ot_handle == NULL);
6286
6287         credits = osd_dto_credits_noquota[DTO_INDEX_INSERT];
6288
6289         /*
6290          * we can't call iget() while a transactions is running
6291          * (this can lead to a deadlock), but we need to know
6292          * inum and object type. so we find this information at
6293          * declaration and cache in per-thread info
6294          */
6295         idc = osd_idc_find_or_init(env, osd, fid);
6296         if (IS_ERR(idc))
6297                 RETURN(PTR_ERR(idc));
6298         if (idc->oic_remote) {
6299                 /*
6300                  * a reference to remote inode is represented by an
6301                  * agent inode which we have to create
6302                  */
6303                 credits += osd_dto_credits_noquota[DTO_OBJECT_CREATE];
6304                 credits += osd_dto_credits_noquota[DTO_INDEX_INSERT];
6305         }
6306
6307         osd_trans_declare_op(env, oh, OSD_OT_INSERT, credits);
6308
6309         if (osd_dt_obj(dt)->oo_inode != NULL) {
6310                 struct inode *inode = osd_dt_obj(dt)->oo_inode;
6311
6312                 /*
6313                  * We ignore block quota on meta pool (MDTs), so needn't
6314                  * calculate how many blocks will be consumed by this index
6315                  * insert
6316                  */
6317                 rc = osd_declare_inode_qid(env, i_uid_read(inode),
6318                                            i_gid_read(inode),
6319                                            i_projid_read(inode), 0,
6320                                            oh, osd_dt_obj(dt), NULL,
6321                                            OSD_QID_BLK);
6322                 if (rc)
6323                         RETURN(rc);
6324
6325 #ifdef HAVE_PROJECT_QUOTA
6326                 /*
6327                  * Reserve credits for local agent inode to transfer
6328                  * to 0, quota enforcement is ignored in this case.
6329                  */
6330                 if (idc->oic_remote &&
6331                     LDISKFS_I(inode)->i_flags & LUSTRE_PROJINHERIT_FL &&
6332                     i_projid_read(inode) != 0)
6333                         rc = osd_declare_attr_qid(env, osd_dt_obj(dt), oh,
6334                                                   0, i_projid_read(inode),
6335                                                   0, false, PRJQUOTA);
6336 #endif
6337         }
6338
6339         RETURN(rc);
6340 }
6341
6342 /**
6343  * Index add function for interoperability mode (b11826).
6344  * It will add the directory entry.This entry is needed to
6345  * maintain name->fid mapping.
6346  *
6347  * \param key it is key i.e. file entry to be inserted
6348  * \param rec it is value of given key i.e. fid
6349  *
6350  * \retval   0, on success
6351  * \retval -ve, on error
6352  */
6353 static int osd_index_ea_insert(const struct lu_env *env, struct dt_object *dt,
6354                                const struct dt_rec *rec,
6355                                const struct dt_key *key, struct thandle *th)
6356 {
6357         struct osd_object *obj = osd_dt_obj(dt);
6358         struct osd_device *osd = osd_dev(dt->do_lu.lo_dev);
6359         struct dt_insert_rec *rec1 = (struct dt_insert_rec *)rec;
6360         const struct lu_fid *fid = rec1->rec_fid;
6361         const char *name = (const char *)key;
6362         struct osd_thread_info *oti = osd_oti_get(env);
6363         struct inode *child_inode = NULL;
6364         struct osd_idmap_cache *idc;
6365         int rc;
6366
6367         ENTRY;
6368
6369         if (!dt_object_exists(dt))
6370                 RETURN(-ENOENT);
6371
6372         LASSERT(osd_invariant(obj));
6373         LASSERT(!dt_object_remote(dt));
6374         LASSERT(th != NULL);
6375
6376         osd_trans_exec_op(env, th, OSD_OT_INSERT);
6377
6378         LASSERTF(fid_is_sane(fid), "fid"DFID" is insane!\n", PFID(fid));
6379
6380         idc = osd_idc_find(env, osd, fid);
6381         if (unlikely(idc == NULL)) {
6382                 idc = osd_idc_find_or_init(env, osd, fid);
6383                 if (IS_ERR(idc)) {
6384                         /*
6385                          * this dt_insert() wasn't declared properly, so
6386                          * FID is missing in OI cache. we better do not
6387                          * lookup FID in FLDB/OI and don't risk to deadlock,
6388                          * but in some special cases (lfsck testing, etc)
6389                          * it's much simpler than fixing a caller.
6390                          *
6391                          * normally this error should be placed after the first
6392                          * find, but migrate may attach source stripes to
6393                          * target, which doesn't create stripes.
6394                          */
6395                         CERROR("%s: "DFID" wasn't declared for insert\n",
6396                                osd_name(osd), PFID(fid));
6397                         dump_stack();
6398                         RETURN(PTR_ERR(idc));
6399                 }
6400         }
6401
6402         if (idc->oic_remote) {
6403                 /* Insert remote entry */
6404                 if (strcmp(name, dotdot) == 0 && strlen(name) == 2) {
6405                         child_inode =
6406                         igrab(osd->od_mdt_map->omm_remote_parent->d_inode);
6407                 } else {
6408                         child_inode = osd_create_local_agent_inode(env, osd,
6409                                         obj, fid, rec1->rec_type & S_IFMT, th);
6410                         if (IS_ERR(child_inode))
6411                                 RETURN(PTR_ERR(child_inode));
6412                 }
6413         } else {
6414                 /* Insert local entry */
6415                 if (unlikely(idc->oic_lid.oii_ino == 0)) {
6416                         /* for a reason OI cache wasn't filled properly */
6417                         CERROR("%s: OIC for "DFID" isn't filled\n",
6418                                osd_name(osd), PFID(fid));
6419                         RETURN(-EINVAL);
6420                 }
6421                 child_inode = oti->oti_inode;
6422                 if (unlikely(child_inode == NULL)) {
6423                         struct ldiskfs_inode_info *lii;
6424
6425                         OBD_ALLOC_PTR(lii);
6426                         if (lii == NULL)
6427                                 RETURN(-ENOMEM);
6428                         child_inode = oti->oti_inode = &lii->vfs_inode;
6429                 }
6430                 child_inode->i_sb = osd_sb(osd);
6431                 child_inode->i_ino = idc->oic_lid.oii_ino;
6432                 child_inode->i_mode = rec1->rec_type & S_IFMT;
6433         }
6434
6435         rc = osd_ea_add_rec(env, obj, child_inode, name, fid, th);
6436
6437         CDEBUG(D_INODE, "parent %lu insert %s:%lu rc = %d\n",
6438                obj->oo_inode->i_ino, name, child_inode->i_ino, rc);
6439
6440         if (child_inode && child_inode != oti->oti_inode)
6441                 iput(child_inode);
6442         LASSERT(osd_invariant(obj));
6443         osd_trans_exec_check(env, th, OSD_OT_INSERT);
6444
6445         RETURN(rc);
6446 }
6447
6448 /**
6449  *  Initialize osd Iterator for given osd index object.
6450  *
6451  *  \param  dt      osd index object
6452  */
6453
6454 static struct dt_it *osd_it_iam_init(const struct lu_env *env,
6455                                      struct dt_object *dt,
6456                                      __u32 unused)
6457 {
6458         struct osd_it_iam *it;
6459         struct osd_object *obj = osd_dt_obj(dt);
6460         struct lu_object *lo = &dt->do_lu;
6461         struct iam_path_descr *ipd;
6462         struct iam_container *bag = &obj->oo_dir->od_container;
6463
6464         if (!dt_object_exists(dt))
6465                 return ERR_PTR(-ENOENT);
6466
6467         OBD_ALLOC_PTR(it);
6468         if (it == NULL)
6469                 return ERR_PTR(-ENOMEM);
6470
6471         ipd = osd_it_ipd_get(env, bag);
6472         if (likely(ipd != NULL)) {
6473                 it->oi_obj = obj;
6474                 it->oi_ipd = ipd;
6475                 lu_object_get(lo);
6476                 iam_it_init(&it->oi_it, bag, IAM_IT_MOVE, ipd);
6477                 return (struct dt_it *)it;
6478         } else {
6479                 OBD_FREE_PTR(it);
6480                 return ERR_PTR(-ENOMEM);
6481         }
6482 }
6483
6484 /**
6485  * free given Iterator.
6486  */
6487 static void osd_it_iam_fini(const struct lu_env *env, struct dt_it *di)
6488 {
6489         struct osd_it_iam *it  = (struct osd_it_iam *)di;
6490         struct osd_object *obj = it->oi_obj;
6491
6492         iam_it_fini(&it->oi_it);
6493         osd_ipd_put(env, &obj->oo_dir->od_container, it->oi_ipd);
6494         osd_object_put(env, obj);
6495         OBD_FREE_PTR(it);
6496 }
6497
6498 /**
6499  *  Move Iterator to record specified by \a key
6500  *
6501  *  \param  di      osd iterator
6502  *  \param  key     key for index
6503  *
6504  *  \retval +ve  di points to record with least key not larger than key
6505  *  \retval  0   di points to exact matched key
6506  *  \retval -ve  failure
6507  */
6508
6509 static int osd_it_iam_get(const struct lu_env *env,
6510                           struct dt_it *di, const struct dt_key *key)
6511 {
6512         struct osd_thread_info *oti = osd_oti_get(env);
6513         struct osd_it_iam *it = (struct osd_it_iam *)di;
6514
6515         if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
6516                 /* swab quota uid/gid */
6517                 oti->oti_quota_id = cpu_to_le64(*((__u64 *)key));
6518                 key = (struct dt_key *)&oti->oti_quota_id;
6519         }
6520
6521         return iam_it_get(&it->oi_it, (const struct iam_key *)key);
6522 }
6523
6524 /**
6525  *  Release Iterator
6526  *
6527  *  \param  di      osd iterator
6528  */
6529 static void osd_it_iam_put(const struct lu_env *env, struct dt_it *di)
6530 {
6531         struct osd_it_iam *it = (struct osd_it_iam *)di;
6532
6533         iam_it_put(&it->oi_it);
6534 }
6535
6536 /**
6537  *  Move iterator by one record
6538  *
6539  *  \param  di      osd iterator
6540  *
6541  *  \retval +1   end of container reached
6542  *  \retval  0   success
6543  *  \retval -ve  failure
6544  */
6545
6546 static int osd_it_iam_next(const struct lu_env *env, struct dt_it *di)
6547 {
6548         struct osd_it_iam *it = (struct osd_it_iam *)di;
6549
6550         return iam_it_next(&it->oi_it);
6551 }
6552
6553 /**
6554  * Return pointer to the key under iterator.
6555  */
6556
6557 static struct dt_key *osd_it_iam_key(const struct lu_env *env,
6558                                      const struct dt_it *di)
6559 {
6560         struct osd_thread_info *oti = osd_oti_get(env);
6561         struct osd_it_iam *it = (struct osd_it_iam *)di;
6562         struct osd_object *obj = it->oi_obj;
6563         struct dt_key *key;
6564
6565         key = (struct dt_key *)iam_it_key_get(&it->oi_it);
6566
6567         if (!IS_ERR(key) && fid_is_quota(lu_object_fid(&obj->oo_dt.do_lu))) {
6568                 /* swab quota uid/gid */
6569                 oti->oti_quota_id = le64_to_cpu(*((__u64 *)key));
6570                 key = (struct dt_key *)&oti->oti_quota_id;
6571         }
6572
6573         return key;
6574 }
6575
6576 /**
6577  * Return size of key under iterator (in bytes)
6578  */
6579
6580 static int osd_it_iam_key_size(const struct lu_env *env, const struct dt_it *di)
6581 {
6582         struct osd_it_iam *it = (struct osd_it_iam *)di;
6583
6584         return iam_it_key_size(&it->oi_it);
6585 }
6586
6587 static inline void
6588 osd_it_append_attrs(struct lu_dirent *ent, int len, __u16 type)
6589 {
6590         /* check if file type is required */
6591         if (ent->lde_attrs & LUDA_TYPE) {
6592                 struct luda_type *lt;
6593                 int align = sizeof(*lt) - 1;
6594
6595                 len = (len + align) & ~align;
6596                 lt = (struct luda_type *)(ent->lde_name + len);
6597                 lt->lt_type = cpu_to_le16(DTTOIF(type));
6598         }
6599
6600         ent->lde_attrs = cpu_to_le32(ent->lde_attrs);
6601 }
6602
6603 /**
6604  * build lu direct from backend fs dirent.
6605  */
6606
6607 static inline void
6608 osd_it_pack_dirent(struct lu_dirent *ent, struct lu_fid *fid, __u64 offset,
6609                    char *name, __u16 namelen, __u16 type, __u32 attr)
6610 {
6611         ent->lde_attrs = attr | LUDA_FID;
6612         fid_cpu_to_le(&ent->lde_fid, fid);
6613
6614         ent->lde_hash = cpu_to_le64(offset);
6615         ent->lde_reclen = cpu_to_le16(lu_dirent_calc_size(namelen, attr));
6616
6617         strncpy(ent->lde_name, name, namelen);
6618         ent->lde_name[namelen] = '\0';
6619         ent->lde_namelen = cpu_to_le16(namelen);
6620
6621         /* append lustre attributes */
6622         osd_it_append_attrs(ent, namelen, type);
6623 }
6624
6625 /**
6626  * Return pointer to the record under iterator.
6627  */
6628 static int osd_it_iam_rec(const struct lu_env *env,
6629                           const struct dt_it *di,
6630                           struct dt_rec *dtrec, __u32 attr)
6631 {
6632         struct osd_it_iam *it = (struct osd_it_iam *)di;
6633         struct osd_thread_info *info = osd_oti_get(env);
6634
6635         ENTRY;
6636
6637         if (S_ISDIR(it->oi_obj->oo_inode->i_mode)) {
6638                 const struct osd_fid_pack *rec;
6639                 struct lu_fid *fid = &info->oti_fid;
6640                 struct lu_dirent *lde = (struct lu_dirent *)dtrec;
6641                 char *name;
6642                 int namelen;
6643                 __u64 hash;
6644                 int rc;
6645
6646                 name = (char *)iam_it_key_get(&it->oi_it);
6647                 if (IS_ERR(name))
6648                         RETURN(PTR_ERR(name));
6649
6650                 namelen = iam_it_key_size(&it->oi_it);
6651
6652                 rec = (const struct osd_fid_pack *)iam_it_rec_get(&it->oi_it);
6653                 if (IS_ERR(rec))
6654                         RETURN(PTR_ERR(rec));
6655
6656                 rc = osd_fid_unpack(fid, rec);
6657                 if (rc)
6658                         RETURN(rc);
6659
6660                 hash = iam_it_store(&it->oi_it);
6661
6662                 /* IAM does not store object type in IAM index (dir) */
6663                 osd_it_pack_dirent(lde, fid, hash, name, namelen,
6664                                    0, LUDA_FID);
6665         } else if (fid_is_quota(lu_object_fid(&it->oi_obj->oo_dt.do_lu))) {
6666                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
6667                            (struct iam_rec *)dtrec);
6668                 osd_quota_unpack(it->oi_obj, dtrec);
6669         } else {
6670                 iam_reccpy(&it->oi_it.ii_path.ip_leaf,
6671                            (struct iam_rec *)dtrec);
6672         }
6673
6674         RETURN(0);
6675 }
6676
6677 /**
6678  * Returns cookie for current Iterator position.
6679  */
6680 static __u64 osd_it_iam_store(const struct lu_env *env, const struct dt_it *di)
6681 {
6682         struct osd_it_iam *it = (struct osd_it_iam *)di;
6683
6684         return iam_it_store(&it->oi_it);
6685 }
6686
6687 /**
6688  * Restore iterator from cookie.
6689  *
6690  * \param  di      osd iterator
6691  * \param  hash    Iterator location cookie
6692  *
6693  * \retval +ve  di points to record with least key not larger than key.
6694  * \retval  0   di points to exact matched key
6695  * \retval -ve  failure
6696  */
6697
6698 static int osd_it_iam_load(const struct lu_env *env,
6699                            const struct dt_it *di, __u64 hash)
6700 {
6701         struct osd_it_iam *it = (struct osd_it_iam *)di;
6702
6703         return iam_it_load(&it->oi_it, hash);
6704 }
6705
6706 static const struct dt_index_operations osd_index_iam_ops = {
6707         .dio_lookup         = osd_index_iam_lookup,
6708         .dio_declare_insert = osd_index_declare_iam_insert,
6709         .dio_insert         = osd_index_iam_insert,
6710         .dio_declare_delete = osd_index_declare_iam_delete,
6711         .dio_delete         = osd_index_iam_delete,
6712         .dio_it     = {
6713                 .init     = osd_it_iam_init,
6714                 .fini     = osd_it_iam_fini,
6715                 .get      = osd_it_iam_get,
6716                 .put      = osd_it_iam_put,
6717                 .next     = osd_it_iam_next,
6718                 .key      = osd_it_iam_key,
6719                 .key_size = osd_it_iam_key_size,
6720                 .rec      = osd_it_iam_rec,
6721                 .store    = osd_it_iam_store,
6722                 .load     = osd_it_iam_load
6723         }
6724 };
6725
6726 struct osd_it_ea *osd_it_dir_init(const struct lu_env *env,
6727                                   struct osd_device *dev,
6728                                   struct inode *inode, u32 attr)
6729 {
6730         struct osd_thread_info *info = osd_oti_get(env);
6731         struct osd_it_ea *oie;
6732         struct file *file;
6733
6734         ENTRY;
6735         file = alloc_file_pseudo(inode, dev->od_mnt, "/", O_NOATIME,
6736                                  inode->i_fop);
6737         if (IS_ERR(file))
6738                 RETURN(ERR_CAST(file));
6739
6740         /* Only FMODE_64BITHASH or FMODE_32BITHASH should be set, NOT both. */
6741         if (attr & LUDA_64BITHASH)
6742                 file->f_mode |= FMODE_64BITHASH;
6743         else
6744                 file->f_mode |= FMODE_32BITHASH;
6745         ihold(inode);
6746
6747         OBD_SLAB_ALLOC_PTR(oie, osd_itea_cachep);
6748         if (!oie)
6749                 goto out_fput;
6750
6751         oie->oie_rd_dirent       = 0;
6752         oie->oie_it_dirent       = 0;
6753         oie->oie_dirent          = NULL;
6754         if (unlikely(!info->oti_it_ea_buf_used)) {
6755                 oie->oie_buf = info->oti_it_ea_buf;
6756                 info->oti_it_ea_buf_used = 1;
6757         } else {
6758                 OBD_ALLOC(oie->oie_buf, OSD_IT_EA_BUFSIZE);
6759                 if (!oie->oie_buf)
6760                         goto out_free;
6761         }
6762         oie->oie_obj = NULL;
6763         oie->oie_file = file;
6764
6765         RETURN(oie);
6766
6767 out_free:
6768         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
6769 out_fput:
6770         fput(file);
6771
6772         return ERR_PTR(-ENOMEM);
6773 }
6774
6775 /**
6776  * Creates or initializes iterator context.
6777  *
6778  * \retval struct osd_it_ea, iterator structure on success
6779  *
6780  */
6781 static struct dt_it *osd_it_ea_init(const struct lu_env *env,
6782                                     struct dt_object *dt,
6783                                     __u32 attr)
6784 {
6785         struct osd_object *obj = osd_dt_obj(dt);
6786         struct osd_device *dev = osd_obj2dev(obj);
6787         struct lu_object *lo = &dt->do_lu;
6788         struct osd_it_ea *oie;
6789
6790         ENTRY;
6791
6792         if (!dt_object_exists(dt) || obj->oo_destroyed)
6793                 RETURN(ERR_PTR(-ENOENT));
6794
6795         oie = osd_it_dir_init(env, dev, obj->oo_inode, attr);
6796         if (IS_ERR(oie))
6797                 RETURN(ERR_CAST(oie));
6798
6799         oie->oie_obj = obj;
6800         lu_object_get(lo);
6801         RETURN((struct dt_it *)oie);
6802 }
6803
6804 void osd_it_dir_fini(const struct lu_env *env, struct osd_it_ea *oie,
6805                      struct inode *inode)
6806 {
6807         struct osd_thread_info *info = osd_oti_get(env);
6808
6809         ENTRY;
6810         fput(oie->oie_file);
6811         if (unlikely(oie->oie_buf != info->oti_it_ea_buf))
6812                 OBD_FREE(oie->oie_buf, OSD_IT_EA_BUFSIZE);
6813         else
6814                 info->oti_it_ea_buf_used = 0;
6815         OBD_SLAB_FREE_PTR(oie, osd_itea_cachep);
6816         EXIT;
6817 }
6818
6819 /**
6820  * Destroy or finishes iterator context.
6821  *
6822  * \param di iterator structure to be destroyed
6823  */
6824 static void osd_it_ea_fini(const struct lu_env *env, struct dt_it *di)
6825 {
6826         struct osd_it_ea *oie = (struct osd_it_ea *)di;
6827         struct osd_object *obj = oie->oie_obj;
6828         struct inode *inode = obj->oo_inode;
6829
6830         ENTRY;
6831         osd_it_dir_fini(env, (struct osd_it_ea *)di, inode);
6832         osd_object_put(env, obj);
6833         EXIT;
6834 }
6835
6836 /**
6837  * It position the iterator at given key, so that next lookup continues from
6838  * that key Or it is similar to dio_it->load() but based on a key,
6839  * rather than file position.
6840  *
6841  * As a special convention, osd_it_ea_get(env, di, "") has to rewind iterator
6842  * to the beginning.
6843  *
6844  * TODO: Presently return +1 considering it is only used by mdd_dir_is_empty().
6845  */
6846 static int osd_it_ea_get(const struct lu_env *env,
6847                          struct dt_it *di, const struct dt_key *key)
6848 {
6849         struct osd_it_ea *it = (struct osd_it_ea *)di;
6850
6851         ENTRY;
6852         LASSERT(((const char *)key)[0] == '\0');
6853         it->oie_file->f_pos = 0;
6854         it->oie_rd_dirent = 0;
6855         it->oie_it_dirent = 0;
6856         it->oie_dirent = NULL;
6857
6858         RETURN(+1);
6859 }
6860
6861 /**
6862  * Does nothing
6863  */
6864 static void osd_it_ea_put(const struct lu_env *env, struct dt_it *di)
6865 {
6866 }
6867
6868 struct osd_filldir_cbs {
6869         struct dir_context ctx;
6870         struct osd_it_ea  *it;
6871 };
6872 /**
6873  * It is called internally by ->iterate*(). It fills the
6874  * iterator's in-memory data structure with required
6875  * information i.e. name, namelen, rec_size etc.
6876  *
6877  * \param buf in which information to be filled in.
6878  * \param name name of the file in given dir
6879  *
6880  * \retval 0 on success
6881  * \retval 1 on buffer full
6882  */
6883 #ifdef HAVE_FILLDIR_USE_CTX
6884 static int osd_ldiskfs_filldir(struct dir_context *buf,
6885 #else
6886 static int osd_ldiskfs_filldir(void *buf,
6887 #endif
6888                                const char *name, int namelen,
6889                                loff_t offset, __u64 ino, unsigned int d_type)
6890 {
6891         struct osd_it_ea *it = ((struct osd_filldir_cbs *)buf)->it;
6892         struct osd_object *obj = it->oie_obj;
6893         struct osd_it_ea_dirent *ent = it->oie_dirent;
6894         struct lu_fid *fid = &ent->oied_fid;
6895         struct osd_fid_pack *rec;
6896         struct lu_fid namefid;
6897
6898         ENTRY;
6899
6900 /* this should never happen */
6901         if (unlikely(namelen == 0 || namelen > LDISKFS_NAME_LEN)) {
6902                 CERROR("ldiskfs return invalid namelen %d\n", namelen);
6903                 RETURN(-EIO);
6904         }
6905
6906         if ((void *)ent - it->oie_buf + sizeof(*ent) + namelen >
6907             OSD_IT_EA_BUFSIZE)
6908                 RETURN(1);
6909
6910         fid_zero(&namefid);
6911
6912         /* "." is just the object itself. */
6913         if (namelen == 1 && name[0] == '.') {
6914                 if (obj != NULL)
6915                         *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
6916         } else if (d_type & LDISKFS_DIRENT_LUFID) {
6917                 rec = (struct osd_fid_pack *)(name + namelen + 1);
6918                 if (osd_fid_unpack(fid, rec) != 0)
6919                         fid_zero(fid);
6920         } else {
6921                 fid_zero(fid);
6922         }
6923         d_type &= ~LDISKFS_DIRENT_LUFID;
6924
6925         /* NOT export local root. */
6926         if (obj != NULL &&
6927             unlikely(osd_sb(osd_obj2dev(obj))->s_root->d_inode->i_ino == ino)) {
6928                 ino = obj->oo_inode->i_ino;
6929                 *fid = obj->oo_dt.do_lu.lo_header->loh_fid;
6930         }
6931
6932         if (name[0] == '[')
6933                 sscanf(name + 1, SFID, RFID(&namefid));
6934         if (fid_is_sane(&namefid) || name_is_dot_or_dotdot(name, namelen) ||
6935             !obj || !(obj->oo_lma_flags & LUSTRE_ENCRYPT_FL)) {
6936                 memcpy(ent->oied_name, name, namelen);
6937         } else {
6938                 int presented_len = critical_chars(name, namelen);
6939
6940                 if (presented_len == namelen)
6941                         memcpy(ent->oied_name, name, namelen);
6942                 else
6943                         namelen = critical_encode(name, namelen,
6944                                                   ent->oied_name);
6945
6946                 ent->oied_name[namelen] = '\0';
6947         }
6948
6949         ent->oied_ino     = ino;
6950         ent->oied_off     = offset;
6951         ent->oied_namelen = namelen;
6952         ent->oied_type    = d_type;
6953
6954         it->oie_rd_dirent++;
6955         it->oie_dirent = (void *)ent + cfs_size_round(sizeof(*ent) + namelen);
6956         RETURN(0);
6957 }
6958
6959 /**
6960  * Calls ->iterate*() to load a directory entry at a time
6961  * and stored it in iterator's in-memory data structure.
6962  *
6963  * \param di iterator's in memory structure
6964  *
6965  * \retval   0 on success
6966  * \retval -ve on error
6967  * \retval +1 reach the end of entry
6968  */
6969 int osd_ldiskfs_it_fill(const struct lu_env *env, const struct dt_it *di)
6970 {
6971         struct osd_it_ea *it = (struct osd_it_ea *)di;
6972         struct osd_object *obj = it->oie_obj;
6973         struct htree_lock *hlock = NULL;
6974         struct file *filp = it->oie_file;
6975         int rc = 0;
6976         struct osd_filldir_cbs buf = {
6977                 .ctx.actor = osd_ldiskfs_filldir,
6978                 .it = it
6979         };
6980
6981         ENTRY;
6982         it->oie_dirent = it->oie_buf;
6983         it->oie_rd_dirent = 0;
6984
6985         if (obj) {
6986                 if (obj->oo_hl_head != NULL) {
6987                         hlock = osd_oti_get(env)->oti_hlock;
6988                         ldiskfs_htree_lock(hlock, obj->oo_hl_head,
6989                                            obj->oo_inode,
6990                                            LDISKFS_HLOCK_READDIR);
6991                 } else {
6992                         down_read(&obj->oo_ext_idx_sem);
6993                 }
6994         }
6995
6996         rc = iterate_dir(filp, &buf.ctx);
6997         if (rc)
6998                 GOTO(unlock, rc);
6999
7000         if (it->oie_rd_dirent == 0) {
7001                 /*
7002                  * If it does not get any dirent, it means it has been reached
7003                  * to the end of the dir
7004                  */
7005                 it->oie_file->f_pos = ldiskfs_get_htree_eof(it->oie_file);
7006                 if (rc == 0)
7007                         rc = 1;
7008         } else {
7009                 it->oie_dirent = it->oie_buf;
7010                 it->oie_it_dirent = 1;
7011         }
7012 unlock:
7013         if (obj) {
7014                 if (hlock != NULL)
7015                         ldiskfs_htree_unlock(hlock);
7016                 else
7017                         up_read(&obj->oo_ext_idx_sem);
7018         }
7019
7020         RETURN(rc);
7021 }
7022
7023 /**
7024  * It calls osd_ldiskfs_it_fill() which will use ->iterate*()
7025  * to load a directory entry at a time and stored it in
7026  * iterator's in-memory data structure.
7027  *
7028  * \param di iterator's in memory structure
7029  *
7030  * \retval +ve iterator reached to end
7031  * \retval   0 iterator not reached to end
7032  * \retval -ve on error
7033  */
7034 static int osd_it_ea_next(const struct lu_env *env, struct dt_it *di)
7035 {
7036         struct osd_it_ea *it = (struct osd_it_ea *)di;
7037         int rc;
7038
7039         ENTRY;
7040
7041         if (it->oie_it_dirent < it->oie_rd_dirent) {
7042                 it->oie_dirent =
7043                         (void *)it->oie_dirent +
7044                         cfs_size_round(sizeof(struct osd_it_ea_dirent) +
7045                                        it->oie_dirent->oied_namelen);
7046                 it->oie_it_dirent++;
7047                 rc = 0;
7048         } else {
7049                 if (it->oie_file->f_pos == ldiskfs_get_htree_eof(it->oie_file))
7050                         rc = 1;
7051                 else
7052                         rc = osd_ldiskfs_it_fill(env, di);
7053         }
7054
7055         RETURN(rc);
7056 }
7057
7058 /**
7059  * Returns the key at current position from iterator's in memory structure.
7060  *
7061  * \param di iterator's in memory structure
7062  *
7063  * \retval key i.e. struct dt_key on success
7064  */
7065 static struct dt_key *osd_it_ea_key(const struct lu_env *env,
7066                                     const struct dt_it *di)
7067 {
7068         struct osd_it_ea *it = (struct osd_it_ea *)di;
7069
7070         return (struct dt_key *)it->oie_dirent->oied_name;
7071 }
7072
7073 /**
7074  * Returns key's size at current position from iterator's in memory structure.
7075  *
7076  * \param di iterator's in memory structure
7077  *
7078  * \retval key_size i.e. struct dt_key on success
7079  */
7080 static int osd_it_ea_key_size(const struct lu_env *env, const struct dt_it *di)
7081 {
7082         struct osd_it_ea *it = (struct osd_it_ea *)di;
7083
7084         return it->oie_dirent->oied_namelen;
7085 }
7086
7087 #if defined LDISKFS_DIR_ENTRY_LEN && defined LDISKFS_DIR_ENTRY_LEN_
7088 #undef LDISKFS_DIR_REC_LEN
7089 #define LDISKFS_DIR_REC_LEN(de)         LDISKFS_DIR_ENTRY_LEN_((de))
7090 #endif
7091
7092 static inline bool osd_dotdot_has_space(struct ldiskfs_dir_entry_2 *de)
7093 {
7094         if (LDISKFS_DIR_REC_LEN(de) >=
7095             __LDISKFS_DIR_REC_LEN(2 + 1 + sizeof(struct osd_fid_pack)))
7096                 return true;
7097
7098         return false;
7099 }
7100
7101 static inline bool
7102 osd_dirent_has_space(struct ldiskfs_dir_entry_2 *de, __u16 namelen,
7103                      unsigned int blocksize, bool dotdot)
7104 {
7105         if (dotdot)
7106                 return osd_dotdot_has_space(de);
7107
7108         if (ldiskfs_rec_len_from_disk(de->rec_len, blocksize) >=
7109             __LDISKFS_DIR_REC_LEN(namelen + 1 + sizeof(struct osd_fid_pack)))
7110                 return true;
7111
7112         return false;
7113 }
7114
7115 static int
7116 osd_dirent_reinsert(const struct lu_env *env, struct osd_device *dev,
7117                     handle_t *jh, struct dentry *dentry,
7118                     const struct lu_fid *fid, struct buffer_head *bh,
7119                     struct ldiskfs_dir_entry_2 *de, struct htree_lock *hlock,
7120                     bool dotdot)
7121 {
7122         struct inode *dir = dentry->d_parent->d_inode;
7123         struct inode *inode = dentry->d_inode;
7124         struct osd_fid_pack *rec;
7125         struct ldiskfs_dentry_param *ldp;
7126         int namelen = dentry->d_name.len;
7127         int rc;
7128         struct osd_thread_info *info = osd_oti_get(env);
7129
7130         ENTRY;
7131
7132         if (!ldiskfs_has_feature_dirdata(inode->i_sb))
7133                 RETURN(0);
7134
7135         /* There is enough space to hold the FID-in-dirent. */
7136         if (osd_dirent_has_space(de, namelen, dir->i_sb->s_blocksize, dotdot)) {
7137                 rc = ldiskfs_journal_get_write_access(jh, bh);
7138                 if (rc != 0)
7139                         RETURN(rc);
7140
7141                 de->name[namelen] = 0;
7142                 rec = (struct osd_fid_pack *)(de->name + namelen + 1);
7143                 rec->fp_len = sizeof(struct lu_fid) + 1;
7144                 fid_cpu_to_be((struct lu_fid *)rec->fp_area, fid);
7145                 de->file_type |= LDISKFS_DIRENT_LUFID;
7146                 rc = ldiskfs_handle_dirty_metadata(jh, NULL, bh);
7147
7148                 RETURN(rc);
7149         }
7150
7151         LASSERT(!dotdot);
7152
7153         rc = ldiskfs_delete_entry(jh, dir, de, bh);
7154         if (rc != 0)
7155                 RETURN(rc);
7156
7157         ldp = (struct ldiskfs_dentry_param *)osd_oti_get(env)->oti_ldp;
7158         osd_get_ldiskfs_dirent_param(ldp, fid);
7159         dentry->d_fsdata = (void *)ldp;
7160         dquot_initialize(dir);
7161         rc = osd_ldiskfs_add_entry(info, dev, jh, dentry, inode, hlock);
7162         /*
7163          * It is too bad, we cannot reinsert the name entry back.
7164          * That means we lose it!
7165          */
7166         if (rc != 0)
7167                 CDEBUG(D_LFSCK,
7168                        "%s: fail to reinsert the dirent, dir = %lu/%u, name = %.*s, "DFID": rc = %d\n",
7169                        osd_ino2name(inode), dir->i_ino, dir->i_generation,
7170                        namelen, dentry->d_name.name, PFID(fid), rc);
7171
7172         RETURN(rc);
7173 }
7174
7175 static int
7176 osd_dirent_check_repair(const struct lu_env *env, struct osd_object *obj,
7177                         struct osd_it_ea *it, struct lu_fid *fid,
7178                         struct osd_inode_id *id, __u32 *attr)
7179 {
7180         struct osd_thread_info *info = osd_oti_get(env);
7181         struct lustre_mdt_attrs *lma = &info->oti_ost_attrs.loa_lma;
7182         struct osd_device *dev = osd_obj2dev(obj);
7183         struct super_block *sb = osd_sb(dev);
7184         const char *devname = osd_name(dev);
7185         struct osd_it_ea_dirent *ent = it->oie_dirent;
7186         struct inode *dir = obj->oo_inode;
7187         struct htree_lock *hlock = NULL;
7188         struct buffer_head *bh = NULL;
7189         handle_t *jh = NULL;
7190         struct ldiskfs_dir_entry_2 *de;
7191         struct dentry *dentry;
7192         struct inode *inode;
7193         const struct lu_fid *pfid = lu_object_fid(&obj->oo_dt.do_lu);
7194         int credits;
7195         int rc;
7196         bool dotdot = false;
7197         bool dirty = false;
7198         struct lu_name ln;
7199
7200         ENTRY;
7201
7202         if (ent->oied_name[0] == '.') {
7203                 if (ent->oied_namelen == 1)
7204                         RETURN(0);
7205
7206                 if (ent->oied_namelen == 2 && ent->oied_name[1] == '.')
7207                         dotdot = true;
7208         }
7209
7210         osd_id_gen(id, ent->oied_ino, OSD_OII_NOGEN);
7211         inode = osd_iget(info, dev, id);
7212         if (IS_ERR(inode)) {
7213                 rc = PTR_ERR(inode);
7214                 if (rc == -ENOENT || rc == -ESTALE) {
7215                         /*
7216                          * Maybe dangling name entry, or
7217                          * corrupted directory entry.
7218                          */
7219                         *attr |= LUDA_UNKNOWN;
7220                         rc = 0;
7221                 } else {
7222                         CDEBUG(D_LFSCK, "%s: fail to iget() for dirent "
7223                                "check_repair, dir = %lu/%u, name = %.*s, "
7224                                "ino = %llu, rc = %d\n",
7225                                devname, dir->i_ino, dir->i_generation,
7226                                ent->oied_namelen, ent->oied_name,
7227                                ent->oied_ino, rc);
7228                 }
7229
7230                 RETURN(rc);
7231         }
7232
7233         rc = obj_name2lu_name(obj, ent->oied_name, ent->oied_namelen, &ln);
7234         if (rc)
7235                 RETURN(rc);
7236
7237         dentry = osd_child_dentry_by_inode(env, dir, ln.ln_name, ln.ln_namelen);
7238         rc = osd_get_lma(info, inode, dentry, &info->oti_ost_attrs);
7239         if (rc == -ENODATA || !fid_is_sane(&lma->lma_self_fid))
7240                 lma = NULL;
7241         else if (rc != 0)
7242                 GOTO(out, rc);
7243
7244         /*
7245          * We need to ensure that the name entry is still valid.
7246          * Because it may be removed or renamed by other already.
7247          *
7248          * The unlink or rename operation will start journal before PDO lock,
7249          * so to avoid deadlock, here we need to start journal handle before
7250          * related PDO lock also. But because we do not know whether there
7251          * will be something to be repaired before PDO lock, we just start
7252          * journal without conditions.
7253          *
7254          * We may need to remove the name entry firstly, then insert back.
7255          * One credit is for user quota file update.
7256          * One credit is for group quota file update.
7257          * Two credits are for dirty inode.
7258          */
7259         credits = osd_dto_credits_noquota[DTO_INDEX_DELETE] +
7260                   osd_dto_credits_noquota[DTO_INDEX_INSERT] + 1 + 1 + 2;
7261
7262         if (dev->od_dirent_journal != 0) {
7263
7264 again:
7265                 jh = osd_journal_start_sb(sb, LDISKFS_HT_MISC, credits);
7266                 if (IS_ERR(jh)) {
7267                         rc = PTR_ERR(jh);
7268                         CDEBUG(D_LFSCK, "%s: fail to start trans for dirent "
7269                                "check_repair, dir = %lu/%u, credits = %d, "
7270                                "name = %.*s, ino = %llu: rc = %d\n",
7271                                devname, dir->i_ino, dir->i_generation, credits,
7272                                ent->oied_namelen, ent->oied_name,
7273                                ent->oied_ino, rc);
7274
7275                         GOTO(out_inode, rc);
7276                 }
7277
7278                 if (obj->oo_hl_head != NULL) {
7279                         hlock = osd_oti_get(env)->oti_hlock;
7280                         /*
7281                          * "0" means exclusive lock for the whole directory.
7282                          * We need to prevent others access such name entry
7283                          * during the delete + insert. Neither HLOCK_ADD nor
7284                          * HLOCK_DEL cannot guarantee the atomicity.
7285                          */
7286                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir, 0);
7287                 } else {
7288                         down_write(&obj->oo_ext_idx_sem);
7289                 }
7290         } else {
7291                 if (obj->oo_hl_head != NULL) {
7292                         hlock = osd_oti_get(env)->oti_hlock;
7293                         ldiskfs_htree_lock(hlock, obj->oo_hl_head, dir,
7294                                            LDISKFS_HLOCK_LOOKUP);
7295                 } else {
7296                         down_read(&obj->oo_ext_idx_sem);
7297                 }
7298         }
7299
7300         bh = osd_ldiskfs_find_entry(dir, &dentry->d_name, &de, NULL, hlock);
7301         if (IS_ERR(bh) || le32_to_cpu(de->inode) != inode->i_ino) {
7302                 *attr |= LUDA_IGNORE;
7303
7304                 GOTO(out, rc = 0);
7305         }
7306
7307         /*
7308          * For dotdot entry, if there is not enough space to hold the
7309          * FID-in-dirent, just keep them there. It only happens when the
7310          * device upgraded from 1.8 or restored from MDT file-level backup.
7311          * For the whole directory, only dotdot entry have no FID-in-dirent
7312          * and needs to get FID from LMA when readdir, it will not affect the
7313          * performance much.
7314          */
7315         if (dotdot && !osd_dotdot_has_space(de)) {
7316                 *attr |= LUDA_UNKNOWN;
7317
7318                 GOTO(out, rc = 0);
7319         }
7320
7321         if (lma != NULL) {
7322                 if (lu_fid_eq(fid, &lma->lma_self_fid))
7323                         GOTO(out, rc = 0);
7324
7325                 if (unlikely(lma->lma_compat & LMAC_NOT_IN_OI)) {
7326                         struct lu_fid *tfid = &lma->lma_self_fid;
7327
7328                         if (likely(dotdot &&
7329                                    fid_seq(tfid) == FID_SEQ_LOCAL_FILE &&
7330                                    fid_oid(tfid) == REMOTE_PARENT_DIR_OID)) {
7331                                 /*
7332                                  * It must be REMOTE_PARENT_DIR and as the
7333                                  * 'dotdot' entry of remote directory
7334                                  */
7335                                 *attr |= LUDA_IGNORE;
7336                         } else {
7337                                 CDEBUG(D_LFSCK, "%s: expect remote agent "
7338                                        "parent directory, but got %.*s under "
7339                                        "dir = %lu/%u with the FID "DFID"\n",
7340                                        devname, ent->oied_namelen,
7341                                        ent->oied_name, dir->i_ino,
7342                                        dir->i_generation, PFID(tfid));
7343
7344                                 *attr |= LUDA_UNKNOWN;
7345                         }
7346
7347                         GOTO(out, rc = 0);
7348                 }
7349         }
7350
7351         if (!fid_is_zero(fid)) {
7352                 rc = osd_verify_ent_by_linkea(env, inode, pfid, ent->oied_name,
7353                                               ent->oied_namelen);
7354                 if (rc == -ENOENT ||
7355                     (rc == -ENODATA &&
7356                      !(dev->od_scrub.os_scrub.os_file.sf_flags & SF_UPGRADE))) {
7357                         /*
7358                          * linkEA does not recognize the dirent entry,
7359                          * it may because the dirent entry corruption
7360                          * and points to other's inode.
7361                          */
7362                         CDEBUG(D_LFSCK, "%s: the target inode does not "
7363                                "recognize the dirent, dir = %lu/%u, "
7364                                " name = %.*s, ino = %llu, "
7365                                DFID": rc = %d\n", devname, dir->i_ino,
7366                                dir->i_generation, ent->oied_namelen,
7367                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
7368                         *attr |= LUDA_UNKNOWN;
7369
7370                         GOTO(out, rc = 0);
7371                 }
7372
7373                 if (rc && rc != -ENODATA) {
7374                         CDEBUG(D_LFSCK, "%s: fail to verify FID in the dirent, "
7375                                "dir = %lu/%u, name = %.*s, ino = %llu, "
7376                                DFID": rc = %d\n", devname, dir->i_ino,
7377                                dir->i_generation, ent->oied_namelen,
7378                                ent->oied_name, ent->oied_ino, PFID(fid), rc);
7379                         *attr |= LUDA_UNKNOWN;
7380
7381                         GOTO(out, rc = 0);
7382                 }
7383         }
7384
7385         if (lma != NULL) {
7386                 /*
7387                  * linkEA recognizes the dirent entry, the FID-in-LMA is
7388                  * valid, trusted, in spite of fid_is_sane(fid) or not.
7389                  */
7390                 if (*attr & LUDA_VERIFY_DRYRUN) {
7391                         *fid = lma->lma_self_fid;
7392                         *attr |= LUDA_REPAIR;
7393
7394                         GOTO(out, rc = 0);
7395                 }
7396
7397                 if (jh == NULL) {
7398                         brelse(bh);
7399                         dev->od_dirent_journal = 1;
7400                         if (hlock != NULL) {
7401                                 ldiskfs_htree_unlock(hlock);
7402                                 hlock = NULL;
7403                         } else {
7404                                 up_read(&obj->oo_ext_idx_sem);
7405                         }
7406
7407                         goto again;
7408                 }
7409
7410                 *fid = lma->lma_self_fid;
7411                 dirty = true;
7412                 /* Update or append the FID-in-dirent. */
7413                 rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
7414                                          bh, de, hlock, dotdot);
7415                 if (rc == 0)
7416                         *attr |= LUDA_REPAIR;
7417                 else
7418                         CDEBUG(D_LFSCK, "%s: fail to re-insert FID after "
7419                                "the dirent, dir = %lu/%u, name = %.*s, "
7420                                "ino = %llu, "DFID": rc = %d\n",
7421                                devname, dir->i_ino, dir->i_generation,
7422                                ent->oied_namelen, ent->oied_name,
7423                                ent->oied_ino, PFID(fid), rc);
7424         } else {
7425                 /* lma is NULL, trust the FID-in-dirent if it is valid. */
7426                 if (*attr & LUDA_VERIFY_DRYRUN) {
7427                         if (fid_is_sane(fid)) {
7428                                 *attr |= LUDA_REPAIR;
7429                         } else if (dev->od_index == 0) {
7430                                 lu_igif_build(fid, inode->i_ino,
7431                                               inode->i_generation);
7432                                 *attr |= LUDA_UPGRADE;
7433                         }
7434
7435                         GOTO(out, rc = 0);
7436                 }
7437
7438                 if (jh == NULL) {
7439                         brelse(bh);
7440                         dev->od_dirent_journal = 1;
7441                         if (hlock != NULL) {
7442                                 ldiskfs_htree_unlock(hlock);
7443                                 hlock = NULL;
7444                         } else {
7445                                 up_read(&obj->oo_ext_idx_sem);
7446                         }
7447
7448                         goto again;
7449                 }
7450
7451                 dirty = true;
7452                 if (unlikely(fid_is_sane(fid))) {
7453                         /*
7454                          * FID-in-dirent exists, but FID-in-LMA is lost.
7455                          * Trust the FID-in-dirent, and add FID-in-LMA.
7456                          */
7457                         rc = osd_ea_fid_set(info, inode, fid, 0, 0);
7458                         if (rc == 0)
7459                                 *attr |= LUDA_REPAIR;
7460                         else
7461                                 CDEBUG(D_LFSCK, "%s: fail to set LMA for "
7462                                        "update dirent, dir = %lu/%u, "
7463                                        "name = %.*s, ino = %llu, "
7464                                        DFID": rc = %d\n",
7465                                        devname, dir->i_ino, dir->i_generation,
7466                                        ent->oied_namelen, ent->oied_name,
7467                                        ent->oied_ino, PFID(fid), rc);
7468                 } else if (dev->od_index == 0) {
7469                         lu_igif_build(fid, inode->i_ino, inode->i_generation);
7470                         /*
7471                          * It is probably IGIF object. Only aappend the
7472                          * FID-in-dirent. OI scrub will process FID-in-LMA.
7473                          */
7474                         rc = osd_dirent_reinsert(env, dev, jh, dentry, fid,
7475                                                  bh, de, hlock, dotdot);
7476                         if (rc == 0)
7477                                 *attr |= LUDA_UPGRADE;
7478                         else
7479                                 CDEBUG(D_LFSCK, "%s: fail to append IGIF "
7480                                        "after the dirent, dir = %lu/%u, "
7481                                        "name = %.*s, ino = %llu, "
7482                                        DFID": rc = %d\n",
7483                                        devname, dir->i_ino, dir->i_generation,
7484                                        ent->oied_namelen, ent->oied_name,
7485                                        ent->oied_ino, PFID(fid), rc);
7486                 }
7487         }
7488
7489         GOTO(out, rc);
7490
7491 out:
7492         if (!IS_ERR(bh))
7493                 brelse(bh);
7494         if (hlock != NULL) {
7495                 ldiskfs_htree_unlock(hlock);
7496         } else {
7497                 if (dev->od_dirent_journal != 0)
7498                         up_write(&obj->oo_ext_idx_sem);
7499                 else
7500                         up_read(&obj->oo_ext_idx_sem);
7501         }
7502
7503         if (jh != NULL)
7504                 ldiskfs_journal_stop(jh);
7505
7506 out_inode:
7507         iput(inode);
7508         if (rc >= 0 && !dirty)
7509                 dev->od_dirent_journal = 0;
7510         if (ln.ln_name != ent->oied_name)
7511                 kfree(ln.ln_name);
7512
7513         return rc;
7514 }
7515
7516 /**
7517  * Returns the value at current position from iterator's in memory structure.
7518  *
7519  * \param di struct osd_it_ea, iterator's in memory structure
7520  * \param attr attr requested for dirent.
7521  * \param lde lustre dirent
7522  *
7523  * \retval   0 no error and \param lde has correct lustre dirent.
7524  * \retval -ve on error
7525  */
7526 static inline int osd_it_ea_rec(const struct lu_env *env,
7527                                 const struct dt_it *di,
7528                                 struct dt_rec *dtrec, __u32 attr)
7529 {
7530         struct osd_it_ea       *it    = (struct osd_it_ea *)di;
7531         struct osd_object      *obj   = it->oie_obj;
7532         struct osd_device      *dev   = osd_obj2dev(obj);
7533         struct osd_thread_info *oti   = osd_oti_get(env);
7534         struct osd_inode_id    *id    = &oti->oti_id;
7535         struct lu_fid          *fid   = &it->oie_dirent->oied_fid;
7536         struct lu_dirent       *lde   = (struct lu_dirent *)dtrec;
7537         __u32 ino = it->oie_dirent->oied_ino;
7538         int rc = 0;
7539
7540         ENTRY;
7541
7542         LASSERT(!is_remote_parent_ino(dev, obj->oo_inode->i_ino));
7543
7544         if (attr & LUDA_VERIFY) {
7545                 if (unlikely(is_remote_parent_ino(dev, ino))) {
7546                         attr |= LUDA_IGNORE;
7547                         /*
7548                          * If the parent is on remote MDT, and there
7549                          * is no FID-in-dirent, then we have to get
7550                          * the parent FID from the linkEA.
7551                          */
7552                         if (!fid_is_sane(fid) &&
7553                             it->oie_dirent->oied_namelen == 2 &&
7554                             it->oie_dirent->oied_name[0] == '.' &&
7555                             it->oie_dirent->oied_name[1] == '.')
7556                                 osd_get_pfid_from_linkea(env, obj, fid);
7557                 } else {
7558                         rc = osd_dirent_check_repair(env, obj, it, fid, id,
7559                                                      &attr);
7560                 }
7561
7562                 if (!fid_is_sane(fid))
7563                         attr |= LUDA_UNKNOWN;
7564         } else {
7565                 attr &= ~LU_DIRENT_ATTRS_MASK;
7566                 if (!fid_is_sane(fid)) {
7567                         bool is_dotdot = false;
7568
7569                         if (it->oie_dirent->oied_namelen == 2 &&
7570                             it->oie_dirent->oied_name[0] == '.' &&
7571                             it->oie_dirent->oied_name[1] == '.')
7572                                 is_dotdot = true;
7573                         /*
7574                          * If the parent is on remote MDT, and there
7575                          * is no FID-in-dirent, then we have to get
7576                          * the parent FID from the linkEA.
7577                          */
7578                         if (is_remote_parent_ino(dev, ino) && is_dotdot) {
7579                                 rc = osd_get_pfid_from_linkea(env, obj, fid);
7580                         } else {
7581                                 if (is_dotdot == false &&
7582                                     OBD_FAIL_CHECK(OBD_FAIL_FID_LOOKUP))
7583                                         RETURN(-ENOENT);
7584
7585                                 rc = osd_ea_fid_get(env, obj, ino, fid, id);
7586                         }
7587                 }
7588         }
7589
7590         /* Pack the entry anyway, at least the offset is right. */
7591         osd_it_pack_dirent(lde, fid, it->oie_dirent->oied_off,
7592                            it->oie_dirent->oied_name,
7593                            it->oie_dirent->oied_namelen,
7594                            it->oie_dirent->oied_type, attr);
7595
7596         RETURN(rc > 0 ? 0 : rc);
7597 }
7598
7599 /**
7600  * Returns the record size size at current position.
7601  *
7602  * This function will return record(lu_dirent) size in bytes.
7603  *
7604  * \param[in] env       execution environment
7605  * \param[in] di        iterator's in memory structure
7606  * \param[in] attr      attribute of the entry, only requires LUDA_TYPE to
7607  *                      calculate the lu_dirent size.
7608  *
7609  * \retval      record size(in bytes & in memory) of the current lu_dirent
7610  *              entry.
7611  */
7612 static int osd_it_ea_rec_size(const struct lu_env *env, const struct dt_it *di,
7613                               __u32 attr)
7614 {
7615         struct osd_it_ea *it = (struct osd_it_ea *)di;
7616
7617         return lu_dirent_calc_size(it->oie_dirent->oied_namelen, attr);
7618 }
7619
7620 /**
7621  * Returns a cookie for current position of the iterator head, so that
7622  * user can use this cookie to load/start the iterator next time.
7623  *
7624  * \param di iterator's in memory structure
7625  *
7626  * \retval cookie for current position, on success
7627  */
7628 static __u64 osd_it_ea_store(const struct lu_env *env, const struct dt_it *di)
7629 {
7630         struct osd_it_ea *it = (struct osd_it_ea *)di;
7631
7632         return it->oie_dirent->oied_off;
7633 }
7634
7635 /**
7636  * It calls osd_ldiskfs_it_fill() which will use ->iterate*()
7637  * to load a directory entry at a time and stored it i inn,
7638  * in iterator's in-memory data structure.
7639  *
7640  * \param di struct osd_it_ea, iterator's in memory structure
7641  *
7642  * \retval +ve on success
7643  * \retval -ve on error
7644  */
7645 static int osd_it_ea_load(const struct lu_env *env,
7646                           const struct dt_it *di, __u64 hash)
7647 {
7648         struct osd_it_ea *it = (struct osd_it_ea *)di;
7649         int rc;
7650
7651         ENTRY;
7652         it->oie_file->f_pos = hash;
7653
7654         rc =  osd_ldiskfs_it_fill(env, di);
7655         if (rc > 0)
7656                 rc = -ENODATA;
7657
7658         if (rc == 0)
7659                 rc = 1;
7660
7661         RETURN(rc);
7662 }
7663
7664 /**
7665  * Index lookup function for interoperability mode (b11826).
7666  *
7667  * \param key,  key i.e. file name to be searched
7668  *
7669  * \retval +ve, on success
7670  * \retval -ve, on error
7671  */
7672 static int osd_index_ea_lookup(const struct lu_env *env, struct dt_object *dt,
7673                                struct dt_rec *rec, const struct dt_key *key)
7674 {
7675         struct osd_object *obj = osd_dt_obj(dt);
7676         int rc = 0;
7677
7678         ENTRY;
7679
7680         LASSERT(S_ISDIR(obj->oo_inode->i_mode));
7681         LINVRNT(osd_invariant(obj));
7682
7683         rc = osd_ea_lookup_rec(env, obj, rec, key);
7684         if (rc == 0)
7685                 rc = 1;
7686         RETURN(rc);
7687 }
7688
7689 /**
7690  * Index and Iterator operations for interoperability
7691  * mode (i.e. to run 2.0 mds on 1.8 disk) (b11826)
7692  */
7693 static const struct dt_index_operations osd_index_ea_ops = {
7694         .dio_lookup         = osd_index_ea_lookup,
7695         .dio_declare_insert = osd_index_declare_ea_insert,
7696         .dio_insert         = osd_index_ea_insert,
7697         .dio_declare_delete = osd_index_declare_ea_delete,
7698         .dio_delete         = osd_index_ea_delete,
7699         .dio_it     = {
7700                 .init     = osd_it_ea_init,
7701                 .fini     = osd_it_ea_fini,
7702                 .get      = osd_it_ea_get,
7703                 .put      = osd_it_ea_put,
7704                 .next     = osd_it_ea_next,
7705                 .key      = osd_it_ea_key,
7706                 .key_size = osd_it_ea_key_size,
7707                 .rec      = osd_it_ea_rec,
7708                 .rec_size = osd_it_ea_rec_size,
7709                 .store    = osd_it_ea_store,
7710                 .load     = osd_it_ea_load
7711         }
7712 };
7713
7714 static void *osd_key_init(const struct lu_context *ctx,
7715                           struct lu_context_key *key)
7716 {
7717         struct osd_thread_info *info;
7718
7719         OBD_ALLOC_PTR(info);
7720         if (info == NULL)
7721                 return ERR_PTR(-ENOMEM);
7722
7723         OBD_ALLOC(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
7724         if (info->oti_it_ea_buf == NULL)
7725                 goto out_free_info;
7726
7727         info->oti_env = container_of(ctx, struct lu_env, le_ctx);
7728
7729         info->oti_hlock = ldiskfs_htree_lock_alloc();
7730         if (info->oti_hlock == NULL)
7731                 goto out_free_ea;
7732
7733         return info;
7734
7735 out_free_ea:
7736         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
7737 out_free_info:
7738         OBD_FREE_PTR(info);
7739         return ERR_PTR(-ENOMEM);
7740 }
7741
7742 static void osd_key_fini(const struct lu_context *ctx,
7743                          struct lu_context_key *key, void *data)
7744 {
7745         struct osd_thread_info *info = data;
7746         struct ldiskfs_inode_info *lli = LDISKFS_I(info->oti_inode);
7747         struct osd_idmap_cache *idc = info->oti_ins_cache;
7748
7749         if (info->oti_dio_pages) {
7750                 int i;
7751                 for (i = 0; i < PTLRPC_MAX_BRW_PAGES; i++) {
7752                         struct page *page = info->oti_dio_pages[i];
7753                         if (page) {
7754                                 LASSERT(PagePrivate2(page));
7755                                 LASSERT(PageLocked(page));
7756                                 ClearPagePrivate2(page);
7757                                 unlock_page(page);
7758                                 __free_page(page);
7759                         }
7760                 }
7761                 OBD_FREE_PTR_ARRAY_LARGE(info->oti_dio_pages,
7762                                          PTLRPC_MAX_BRW_PAGES);
7763         }
7764
7765         if (info->oti_inode != NULL)
7766                 OBD_FREE_PTR(lli);
7767         if (info->oti_hlock != NULL)
7768                 ldiskfs_htree_lock_free(info->oti_hlock);
7769         OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
7770         lu_buf_free(&info->oti_iobuf.dr_pg_buf);
7771         lu_buf_free(&info->oti_iobuf.dr_bl_buf);
7772         lu_buf_free(&info->oti_iobuf.dr_lnb_buf);
7773         lu_buf_free(&info->oti_big_buf);
7774         if (idc != NULL) {
7775                 LASSERT(info->oti_ins_cache_size > 0);
7776                 OBD_FREE_PTR_ARRAY_LARGE(idc, info->oti_ins_cache_size);
7777                 info->oti_ins_cache = NULL;
7778                 info->oti_ins_cache_size = 0;
7779         }
7780         OBD_FREE_PTR(info);
7781 }
7782
7783 static void osd_key_exit(const struct lu_context *ctx,
7784                          struct lu_context_key *key, void *data)
7785 {
7786         struct osd_thread_info *info = data;
7787
7788         LASSERT(info->oti_r_locks == 0);
7789         LASSERT(info->oti_w_locks == 0);
7790         LASSERT(info->oti_txns    == 0);
7791 }
7792
7793 /* type constructor/destructor: osd_type_init, osd_type_fini */
7794 LU_TYPE_INIT_FINI(osd, &osd_key);
7795
7796 struct lu_context_key osd_key = {
7797         .lct_tags = LCT_DT_THREAD | LCT_MD_THREAD | LCT_MG_THREAD | LCT_LOCAL,
7798         .lct_init = osd_key_init,
7799         .lct_fini = osd_key_fini,
7800         .lct_exit = osd_key_exit
7801 };
7802
7803
7804 static int osd_device_init(const struct lu_env *env, struct lu_device *d,
7805                            const char *name, struct lu_device *next)
7806 {
7807         struct osd_device *osd = osd_dev(d);
7808
7809         if (strlcpy(osd->od_svname, name, sizeof(osd->od_svname)) >=
7810             sizeof(osd->od_svname))
7811                 return -E2BIG;
7812         return osd_procfs_init(osd, name);
7813 }
7814
7815 static int osd_fid_init(const struct lu_env *env, struct osd_device *osd)
7816 {
7817         struct seq_server_site *ss = osd_seq_site(osd);
7818         int rc = 0;
7819
7820         ENTRY;
7821
7822         if (osd->od_is_ost || osd->od_cl_seq != NULL)
7823                 RETURN(0);
7824
7825         if (unlikely(ss == NULL))
7826                 RETURN(-ENODEV);
7827
7828         OBD_ALLOC_PTR(osd->od_cl_seq);
7829         if (osd->od_cl_seq == NULL)
7830                 RETURN(-ENOMEM);
7831
7832         seq_client_init(osd->od_cl_seq, NULL, LUSTRE_SEQ_METADATA,
7833                         osd->od_svname, ss->ss_server_seq);
7834
7835         if (ss->ss_node_id == 0) {
7836                 /*
7837                  * If the OSD on the sequence controller(MDT0), then allocate
7838                  * sequence here, otherwise allocate sequence after connected
7839                  * to MDT0 (see mdt_register_lwp_callback()).
7840                  */
7841                 rc = seq_server_alloc_meta(osd->od_cl_seq->lcs_srv,
7842                                    &osd->od_cl_seq->lcs_space, env);
7843         }
7844
7845         RETURN(rc);
7846 }
7847
7848 static void osd_fid_fini(const struct lu_env *env, struct osd_device *osd)
7849 {
7850         if (osd->od_cl_seq == NULL)
7851                 return;
7852
7853         seq_client_fini(osd->od_cl_seq);
7854         OBD_FREE_PTR(osd->od_cl_seq);
7855         osd->od_cl_seq = NULL;
7856 }
7857
7858 static int osd_shutdown(const struct lu_env *env, struct osd_device *o)
7859 {
7860         ENTRY;
7861
7862         /* shutdown quota slave instance associated with the device */
7863         if (o->od_quota_slave_md != NULL) {
7864                 struct qsd_instance *qsd = o->od_quota_slave_md;
7865
7866                 o->od_quota_slave_md = NULL;
7867                 qsd_fini(env, qsd);
7868         }
7869
7870         if (o->od_quota_slave_dt != NULL) {
7871                 struct qsd_instance *qsd = o->od_quota_slave_dt;
7872
7873                 o->od_quota_slave_dt = NULL;
7874                 qsd_fini(env, qsd);
7875         }
7876
7877         osd_fid_fini(env, o);
7878         osd_scrub_cleanup(env, o);
7879
7880         RETURN(0);
7881 }
7882
7883 static void osd_umount(const struct lu_env *env, struct osd_device *o)
7884 {
7885         ENTRY;
7886
7887         if (o->od_mnt != NULL) {
7888                 shrink_dcache_sb(osd_sb(o));
7889                 osd_sync(env, &o->od_dt_dev);
7890                 wait_event(o->od_commit_cb_done,
7891                           !atomic_read(&o->od_commit_cb_in_flight));
7892
7893                 mntput(o->od_mnt);
7894                 o->od_mnt = NULL;
7895         }
7896
7897         EXIT;
7898 }
7899
7900 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
7901 # ifndef LDISKFS_HAS_INCOMPAT_FEATURE
7902 /* Newer kernels provide the ldiskfs_set_feature_largedir() wrapper already,
7903  * which calls ldiskfs_update_dynamic_rev() to update ancient filesystems.
7904  * All ldiskfs filesystems are already v2, so it is a no-op and unnecessary.
7905  * This avoids maintaining patches to export this otherwise-useless function.
7906  */
7907 void ldiskfs_update_dynamic_rev(struct super_block *sb)
7908 {
7909         /* do nothing */
7910 }
7911 # endif
7912 #endif
7913
7914 static int osd_mount(const struct lu_env *env,
7915                      struct osd_device *o, struct lustre_cfg *cfg)
7916 {
7917         const char *name = lustre_cfg_string(cfg, 0);
7918         const char *dev = lustre_cfg_string(cfg, 1);
7919         const char *opts;
7920         unsigned long page, s_flags = 0, lmd_flags = 0;
7921         struct page *__page;
7922         struct file_system_type *type;
7923         char *options = NULL;
7924         const char *str;
7925         struct osd_thread_info *info = osd_oti_get(env);
7926         struct lu_fid *fid = &info->oti_fid;
7927         struct inode *inode;
7928         int rc = 0, force_over_1024tb = 0;
7929
7930         ENTRY;
7931
7932         if (o->od_mnt != NULL)
7933                 RETURN(0);
7934
7935         if (strlen(dev) >= sizeof(o->od_mntdev))
7936                 RETURN(-E2BIG);
7937         strcpy(o->od_mntdev, dev);
7938
7939         str = lustre_cfg_buf(cfg, 2);
7940         sscanf(str, "%lu:%lu", &s_flags, &lmd_flags);
7941
7942         opts = lustre_cfg_string(cfg, 3);
7943 #ifdef __BIG_ENDIAN
7944         if (opts == NULL || strstr(opts, "bigendian_extents") == NULL) {
7945                 CERROR("%s: device %s extents feature is not guaranteed to "
7946                        "work on big-endian systems. Use \"bigendian_extents\" "
7947                        "mount option to override.\n", name, dev);
7948                 RETURN(-EINVAL);
7949         }
7950 #endif
7951 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 53, 0)
7952         if (opts != NULL && strstr(opts, "force_over_128tb") != NULL) {
7953                 CWARN("force_over_128tb option is deprecated.  Filesystems smaller than 1024TB can be created without any force option. Use force_over_1024tb option for filesystems larger than 1024TB.\n");
7954         }
7955 #endif
7956 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 1, 53, 0)
7957         if (opts != NULL && strstr(opts, "force_over_256tb") != NULL) {
7958                 CWARN("force_over_256tb option is deprecated.  Filesystems smaller than 1024TB can be created without any force options. Use force_over_1024tb option for filesystems larger than 1024TB.\n");
7959         }
7960 #endif
7961 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
7962         if (opts != NULL && strstr(opts, "force_over_512tb") != NULL) {
7963                 CWARN("force_over_512tb option is deprecated.  Filesystems smaller than 1024TB can be created without any force options. Use force_over_1024tb option for filesystems larger than 1024TB.\n");
7964         }
7965 #endif
7966
7967         if (opts != NULL && strstr(opts, "force_over_1024tb") != NULL)
7968                 force_over_1024tb = 1;
7969
7970         __page = alloc_page(GFP_KERNEL);
7971         if (__page == NULL)
7972                 GOTO(out, rc = -ENOMEM);
7973         page = (unsigned long)page_address(__page);
7974         options = (char *)page;
7975         *options = '\0';
7976         if (opts != NULL) {
7977                 /* strip out the options for back compatiblity */
7978                 static const char * const sout[] = {
7979                         "mballoc",
7980                         "iopen",
7981                         "noiopen",
7982                         "iopen_nopriv",
7983                         "extents",
7984                         "noextents",
7985                         /* strip out option we processed in osd */
7986                         "bigendian_extents",
7987                         "force_over_128tb",
7988                         "force_over_256tb",
7989                         "force_over_512tb",
7990                         "force_over_1024tb",
7991                         "resetoi",
7992                         NULL
7993                 };
7994                 strncat(options, opts, PAGE_SIZE);
7995                 for (rc = 0, str = options; sout[rc]; ) {
7996                         char *op = strstr(str, sout[rc]);
7997
7998                         if (op == NULL) {
7999                                 rc++;
8000                                 str = options;
8001                                 continue;
8002                         }
8003                         if (op == options || *(op - 1) == ',') {
8004                                 str = op + strlen(sout[rc]);
8005                                 if (*str == ',' || *str == '\0') {
8006                                         *str == ',' ? str++ : str;
8007                                         memmove(op, str, strlen(str) + 1);
8008                                 }
8009                         }
8010                         for (str = op; *str != ',' && *str != '\0'; str++)
8011                                 ;
8012                 }
8013         } else {
8014                 strncat(options, "user_xattr,acl", PAGE_SIZE);
8015         }
8016
8017         /* Glom up mount options */
8018         if (*options != '\0')
8019                 strncat(options, ",", PAGE_SIZE);
8020         strncat(options, "no_mbcache,nodelalloc", PAGE_SIZE);
8021
8022         type = get_fs_type("ldiskfs");
8023         if (!type) {
8024                 CERROR("%s: cannot find ldiskfs module\n", name);
8025                 GOTO(out, rc = -ENODEV);
8026         }
8027
8028         o->od_mnt = vfs_kern_mount(type, s_flags, dev, options);
8029         module_put(type->owner);
8030
8031         if (IS_ERR(o->od_mnt)) {
8032                 rc = PTR_ERR(o->od_mnt);
8033                 o->od_mnt = NULL;
8034                 CERROR("%s: can't mount %s: %d\n", name, dev, rc);
8035                 GOTO(out, rc);
8036         }
8037
8038         if (ldiskfs_blocks_count(LDISKFS_SB(osd_sb(o))->s_es) <<
8039                                  osd_sb(o)->s_blocksize_bits > 1024ULL << 40 &&
8040                                  force_over_1024tb == 0) {
8041                 CERROR("%s: device %s LDISKFS has not been tested on filesystems larger than 1024TB and may cause data corruption. Use 'force_over_1024tb' mount option to override.\n",
8042                        name, dev);
8043                 GOTO(out_mnt, rc = -EINVAL);
8044         }
8045
8046         if (lmd_flags & LMD_FLG_DEV_RDONLY) {
8047                 LCONSOLE_WARN("%s: not support dev_rdonly on this device\n",
8048                               name);
8049
8050                 GOTO(out_mnt, rc = -EOPNOTSUPP);
8051         }
8052
8053         if (!ldiskfs_has_feature_journal(o->od_mnt->mnt_sb)) {
8054                 CERROR("%s: device %s is mounted w/o journal\n", name, dev);
8055                 GOTO(out_mnt, rc = -EINVAL);
8056         }
8057
8058         if (ldiskfs_has_feature_fast_commit(o->od_mnt->mnt_sb)) {
8059                 CERROR("%s: device %s is mounted with fast_commit that breaks recovery\n",
8060                        name, dev);
8061                 GOTO(out_mnt, rc = -EOPNOTSUPP);
8062         }
8063
8064 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 53, 0)
8065 #ifdef LDISKFS_MOUNT_DIRDATA
8066         if (ldiskfs_has_feature_dirdata(o->od_mnt->mnt_sb))
8067                 LDISKFS_SB(osd_sb(o))->s_mount_opt |= LDISKFS_MOUNT_DIRDATA;
8068         else if (strstr(name, "MDT")) /* don't complain for MGT or OSTs */
8069                 CWARN("%s: device %s was upgraded from Lustre-1.x without "
8070                       "enabling the dirdata feature. If you do not want to "
8071                       "downgrade to Lustre-1.x again, you can enable it via "
8072                       "'tune2fs -O dirdata device'\n", name, dev);
8073 #endif
8074         /* enable large_dir on MDTs to avoid REMOTE_PARENT_DIR overflow,
8075          * and on very large OSTs to avoid object directory overflow */
8076         if (unlikely(!ldiskfs_has_feature_largedir(o->od_mnt->mnt_sb) &&
8077                      !strstr(name, "MGS"))) {
8078                 ldiskfs_set_feature_largedir(o->od_mnt->mnt_sb);
8079                 LCONSOLE_INFO("%s: enabled 'large_dir' feature on device %s\n",
8080                               name, dev);
8081         }
8082 #endif
8083         inode = osd_sb(o)->s_root->d_inode;
8084         lu_local_obj_fid(fid, OSD_FS_ROOT_OID);
8085         rc = osd_ea_fid_set(info, inode, fid, LMAC_NOT_IN_OI, 0);
8086         if (rc != 0) {
8087                 CERROR("%s: failed to set lma on %s root inode\n", name, dev);
8088                 GOTO(out_mnt, rc);
8089         }
8090
8091         if (lmd_flags & LMD_FLG_NOSCRUB)
8092                 o->od_scrub.os_scrub.os_auto_scrub_interval = AS_NEVER;
8093
8094         if (blk_queue_nonrot(bdev_get_queue(osd_sb(o)->s_bdev))) {
8095                 /* do not use pagecache with flash-backed storage */
8096                 o->od_writethrough_cache = 0;
8097                 o->od_read_cache = 0;
8098         }
8099
8100         GOTO(out, rc = 0);
8101
8102 out_mnt:
8103         mntput(o->od_mnt);
8104         o->od_mnt = NULL;
8105
8106 out:
8107         if (__page)
8108                 __free_page(__page);
8109
8110         return rc;
8111 }
8112
8113 static struct lu_device *osd_device_fini(const struct lu_env *env,
8114                                          struct lu_device *d)
8115 {
8116         struct osd_device *o = osd_dev(d);
8117
8118         ENTRY;
8119
8120         osd_index_backup(env, o, false);
8121         osd_shutdown(env, o);
8122         osd_procfs_fini(o);
8123         if (o->od_oi_table != NULL)
8124                 osd_oi_fini(osd_oti_get(env), o);
8125         if (o->od_extent_bytes_percpu)
8126                 free_percpu(o->od_extent_bytes_percpu);
8127         osd_obj_map_fini(o);
8128         osd_umount(env, o);
8129
8130         RETURN(NULL);
8131 }
8132
8133 static int osd_device_init0(const struct lu_env *env,
8134                             struct osd_device *o,
8135                             struct lustre_cfg *cfg)
8136 {
8137         struct lu_device *l = osd2lu_dev(o);
8138         struct osd_thread_info *info;
8139         int cplen = 0;
8140         char *opts = NULL;
8141         bool restored = false;
8142         int rc;
8143
8144         /* if the module was re-loaded, env can loose its keys */
8145         rc = lu_env_refill((struct lu_env *)env);
8146         if (rc)
8147                 GOTO(out, rc);
8148         info = osd_oti_get(env);
8149         LASSERT(info);
8150
8151         l->ld_ops = &osd_lu_ops;
8152         o->od_dt_dev.dd_ops = &osd_dt_ops;
8153
8154         spin_lock_init(&o->od_osfs_lock);
8155         mutex_init(&o->od_otable_mutex);
8156         INIT_LIST_HEAD(&o->od_orphan_list);
8157         INIT_LIST_HEAD(&o->od_index_backup_list);
8158         INIT_LIST_HEAD(&o->od_index_restore_list);
8159         spin_lock_init(&o->od_lock);
8160         o->od_index_backup_policy = LIBP_NONE;
8161         o->od_t10_type = 0;
8162         init_waitqueue_head(&o->od_commit_cb_done);
8163
8164         o->od_read_cache = 1;
8165         o->od_writethrough_cache = 1;
8166         o->od_readcache_max_filesize = OSD_MAX_CACHE_SIZE;
8167         o->od_readcache_max_iosize = OSD_READCACHE_MAX_IO_MB << 20;
8168         o->od_writethrough_max_iosize = OSD_WRITECACHE_MAX_IO_MB << 20;
8169         o->od_scrub.os_scrub.os_auto_scrub_interval = AS_DEFAULT;
8170         /* default fallocate to unwritten extents: LU-14326/LU-14333 */
8171         o->od_fallocate_zero_blocks = 0;
8172
8173         cplen = strlcpy(o->od_svname, lustre_cfg_string(cfg, 4),
8174                         sizeof(o->od_svname));
8175         if (cplen >= sizeof(o->od_svname)) {
8176                 rc = -E2BIG;
8177                 GOTO(out, rc);
8178         }
8179
8180         o->od_index_backup_stop = 0;
8181         o->od_index = -1; /* -1 means index is invalid */
8182         rc = server_name2index(o->od_svname, &o->od_index, NULL);
8183         if (rc == LDD_F_SV_TYPE_OST)
8184                 o->od_is_ost = 1;
8185
8186         o->od_full_scrub_ratio = OFSR_DEFAULT;
8187         o->od_full_scrub_threshold_rate = FULL_SCRUB_THRESHOLD_RATE_DEFAULT;
8188         rc = osd_mount(env, o, cfg);
8189         if (rc != 0)
8190                 GOTO(out, rc);
8191
8192         /* Can only check block device after mount */
8193         o->od_nonrotational =
8194                 blk_queue_nonrot(bdev_get_queue(osd_sb(o)->s_bdev));
8195
8196         rc = osd_obj_map_init(env, o);
8197         if (rc != 0)
8198                 GOTO(out_mnt, rc);
8199
8200         rc = lu_site_init(&o->od_site, l);
8201         if (rc != 0)
8202                 GOTO(out_compat, rc);
8203         o->od_site.ls_bottom_dev = l;
8204
8205         rc = lu_site_init_finish(&o->od_site);
8206         if (rc != 0)
8207                 GOTO(out_site, rc);
8208
8209         opts = lustre_cfg_string(cfg, 3);
8210         if (opts && strstr(opts, "resetoi"))
8211                 restored = true;
8212
8213         INIT_LIST_HEAD(&o->od_ios_list);
8214
8215         rc = lprocfs_init_brw_stats(&o->od_brw_stats);
8216         if (rc)
8217                 GOTO(out_brw_stats, rc);
8218
8219         /* setup scrub, including OI files initialization */
8220         o->od_in_init = 1;
8221         rc = osd_scrub_setup(env, o, restored);
8222         o->od_in_init = 0;
8223         if (rc < 0)
8224                 GOTO(out_brw_stats, rc);
8225
8226         rc = osd_procfs_init(o, o->od_svname);
8227         if (rc != 0) {
8228                 CERROR("%s: can't initialize procfs: rc = %d\n",
8229                        o->od_svname, rc);
8230                 GOTO(out_scrub, rc);
8231         }
8232
8233         LASSERT(l->ld_site->ls_linkage.next != NULL);
8234         LASSERT(l->ld_site->ls_linkage.prev != NULL);
8235
8236         /* initialize quota slave instance */
8237         /* currently it's no need to prepare qsd_instance_md for OST */
8238         if (!o->od_is_ost) {
8239                 o->od_quota_slave_md = qsd_init(env, o->od_svname,
8240                                                 &o->od_dt_dev, o->od_proc_entry,
8241                                                 true, true);
8242                 if (IS_ERR(o->od_quota_slave_md)) {
8243                         rc = PTR_ERR(o->od_quota_slave_md);
8244                         o->od_quota_slave_md = NULL;
8245                         GOTO(out_procfs, rc);
8246                 }
8247         }
8248
8249         o->od_quota_slave_dt = qsd_init(env, o->od_svname, &o->od_dt_dev,
8250                                         o->od_proc_entry, false, true);
8251
8252         if (IS_ERR(o->od_quota_slave_dt)) {
8253                 if (o->od_quota_slave_md != NULL) {
8254                         qsd_fini(env, o->od_quota_slave_md);
8255                         o->od_quota_slave_md = NULL;
8256                 }
8257
8258                 rc = PTR_ERR(o->od_quota_slave_dt);
8259                 o->od_quota_slave_dt = NULL;
8260                 GOTO(out_procfs, rc);
8261         }
8262
8263         o->od_extent_bytes_percpu = alloc_percpu(unsigned int);
8264         if (!o->od_extent_bytes_percpu) {
8265                 rc = -ENOMEM;
8266                 GOTO(out_procfs, rc);
8267         }
8268
8269         RETURN(0);
8270
8271 out_procfs:
8272         osd_procfs_fini(o);
8273 out_scrub:
8274         osd_scrub_cleanup(env, o);
8275 out_brw_stats:
8276         lprocfs_fini_brw_stats(&o->od_brw_stats);
8277 out_site:
8278         lu_site_fini(&o->od_site);
8279 out_compat:
8280         osd_obj_map_fini(o);
8281 out_mnt:
8282         osd_umount(env, o);
8283 out:
8284         return rc;
8285 }
8286
8287 static struct lu_device *osd_device_alloc(const struct lu_env *env,
8288                                           struct lu_device_type *t,
8289                                           struct lustre_cfg *cfg)
8290 {
8291         struct osd_device *o;
8292         int rc;
8293
8294         OBD_ALLOC_PTR(o);
8295         if (o == NULL)
8296                 return ERR_PTR(-ENOMEM);
8297
8298         rc = dt_device_init(&o->od_dt_dev, t);
8299         if (rc == 0) {
8300                 /*
8301                  * Because the ctx might be revived in dt_device_init,
8302                  * refill the env here
8303                  */
8304                 lu_env_refill((struct lu_env *)env);
8305                 rc = osd_device_init0(env, o, cfg);
8306                 if (rc)
8307                         dt_device_fini(&o->od_dt_dev);
8308         }
8309
8310         if (unlikely(rc != 0))
8311                 OBD_FREE_PTR(o);
8312
8313         return rc == 0 ? osd2lu_dev(o) : ERR_PTR(rc);
8314 }
8315
8316 static struct lu_device *osd_device_free(const struct lu_env *env,
8317                                          struct lu_device *d)
8318 {
8319         struct osd_device *o = osd_dev(d);
8320
8321         ENTRY;
8322
8323         /* XXX: make osd top device in order to release reference */
8324         d->ld_site->ls_top_dev = d;
8325         lu_site_purge(env, d->ld_site, -1);
8326         lu_site_print(env, d->ld_site, &d->ld_site->ls_obj_hash.nelems,
8327                       D_ERROR, lu_cdebug_printer);
8328         lu_site_fini(&o->od_site);
8329         dt_device_fini(&o->od_dt_dev);
8330         OBD_FREE_PTR(o);
8331         RETURN(NULL);
8332 }
8333
8334 static int osd_process_config(const struct lu_env *env,
8335                               struct lu_device *d, struct lustre_cfg *cfg)
8336 {
8337         struct osd_device *o = osd_dev(d);
8338         ssize_t count;
8339         int rc;
8340
8341         ENTRY;
8342
8343         switch (cfg->lcfg_command) {
8344         case LCFG_SETUP:
8345                 rc = osd_mount(env, o, cfg);
8346                 break;
8347         case LCFG_CLEANUP:
8348                 /*
8349                  * For the case LCFG_PRE_CLEANUP is not called in advance,
8350                  * that may happend if hit failure during mount process.
8351                  */
8352                 osd_index_backup(env, o, false);
8353                 lu_dev_del_linkage(d->ld_site, d);
8354                 rc = osd_shutdown(env, o);
8355                 break;
8356         case LCFG_PARAM:
8357                 LASSERT(&o->od_dt_dev);
8358                 count  = class_modify_config(cfg, PARAM_OSD,
8359                                              &o->od_dt_dev.dd_kobj);
8360                 if (count < 0)
8361                         count = class_modify_config(cfg, PARAM_OST,
8362                                                     &o->od_dt_dev.dd_kobj);
8363                 rc = count > 0 ? 0 : count;
8364                 break;
8365         case LCFG_PRE_CLEANUP:
8366                 osd_scrub_stop(o);
8367                 osd_index_backup(env, o,
8368                                  o->od_index_backup_policy != LIBP_NONE);
8369                 rc = 0;
8370                 break;
8371         default:
8372                 rc = -ENOSYS;
8373         }
8374
8375         RETURN(rc);
8376 }
8377
8378 static int osd_recovery_complete(const struct lu_env *env,
8379                                  struct lu_device *d)
8380 {
8381         struct osd_device *osd = osd_dev(d);
8382         int rc = 0;
8383
8384         ENTRY;
8385
8386         if (osd->od_quota_slave_md == NULL && osd->od_quota_slave_dt == NULL)
8387                 RETURN(0);
8388
8389         /*
8390          * start qsd instance on recovery completion, this notifies the quota
8391          * slave code that we are about to process new requests now
8392          */
8393         rc = qsd_start(env, osd->od_quota_slave_dt);
8394         if (rc == 0 && osd->od_quota_slave_md != NULL)
8395                 rc = qsd_start(env, osd->od_quota_slave_md);
8396
8397         RETURN(rc);
8398 }
8399
8400 /*
8401  * we use exports to track all osd users
8402  */
8403 static int osd_obd_connect(const struct lu_env *env, struct obd_export **exp,
8404                            struct obd_device *obd, struct obd_uuid *cluuid,
8405                            struct obd_connect_data *data, void *localdata)
8406 {
8407         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8408         struct lustre_handle conn;
8409         int rc;
8410
8411         ENTRY;
8412
8413         CDEBUG(D_CONFIG, "connect #%d\n", osd->od_connects);
8414
8415         rc = class_connect(&conn, obd, cluuid);
8416         if (rc)
8417                 RETURN(rc);
8418
8419         *exp = class_conn2export(&conn);
8420
8421         spin_lock(&osd->od_osfs_lock);
8422         osd->od_connects++;
8423         spin_unlock(&osd->od_osfs_lock);
8424
8425         RETURN(0);
8426 }
8427
8428 /*
8429  * once last export (we don't count self-export) disappeared
8430  * osd can be released
8431  */
8432 static int osd_obd_disconnect(struct obd_export *exp)
8433 {
8434         struct obd_device *obd = exp->exp_obd;
8435         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8436         int rc, release = 0;
8437
8438         ENTRY;
8439
8440         /* Only disconnect the underlying layers on the final disconnect. */
8441         spin_lock(&osd->od_osfs_lock);
8442         osd->od_connects--;
8443         if (osd->od_connects == 0)
8444                 release = 1;
8445         spin_unlock(&osd->od_osfs_lock);
8446
8447         rc = class_disconnect(exp); /* bz 9811 */
8448
8449         if (rc == 0 && release)
8450                 class_manual_cleanup(obd);
8451         RETURN(rc);
8452 }
8453
8454 static int osd_prepare(const struct lu_env *env, struct lu_device *pdev,
8455                        struct lu_device *dev)
8456 {
8457         struct osd_device *osd = osd_dev(dev);
8458         struct lr_server_data *lsd =
8459                         &osd->od_dt_dev.dd_lu_dev.ld_site->ls_tgt->lut_lsd;
8460         int result = 0;
8461
8462         ENTRY;
8463
8464         if (osd->od_quota_slave_md != NULL) {
8465                 /* set up quota slave objects for inode */
8466                 result = qsd_prepare(env, osd->od_quota_slave_md);
8467                 if (result != 0)
8468                         RETURN(result);
8469         }
8470
8471         if (osd->od_quota_slave_dt != NULL) {
8472                 /* set up quota slave objects for block */
8473                 result = qsd_prepare(env, osd->od_quota_slave_dt);
8474                 if (result != 0)
8475                         RETURN(result);
8476         }
8477
8478
8479         if (lsd->lsd_feature_incompat & OBD_COMPAT_OST) {
8480 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 0, 52, 0)
8481                 if (lsd->lsd_feature_rocompat & OBD_ROCOMPAT_IDX_IN_IDIF) {
8482                         osd->od_index_in_idif = 1;
8483                 } else {
8484                         osd->od_index_in_idif = 0;
8485                         result = osd_register_proc_index_in_idif(osd);
8486                         if (result != 0)
8487                                 RETURN(result);
8488                 }
8489 #else
8490                 osd->od_index_in_idif = 1;
8491 #endif
8492         }
8493
8494         result = osd_fid_init(env, osd);
8495
8496         RETURN(result);
8497 }
8498
8499 /**
8500  * Implementation of lu_device_operations::ldo_fid_alloc() for OSD
8501  *
8502  * Allocate FID.
8503  *
8504  * see include/lu_object.h for the details.
8505  */
8506 static int osd_fid_alloc(const struct lu_env *env, struct lu_device *d,
8507                          struct lu_fid *fid, struct lu_object *parent,
8508                          const struct lu_name *name)
8509 {
8510         struct osd_device *osd = osd_dev(d);
8511
8512         return seq_client_alloc_fid(env, osd->od_cl_seq, fid);
8513 }
8514
8515 static const struct lu_object_operations osd_lu_obj_ops = {
8516         .loo_object_init      = osd_object_init,
8517         .loo_object_delete    = osd_object_delete,
8518         .loo_object_release   = osd_object_release,
8519         .loo_object_free      = osd_object_free,
8520         .loo_object_print     = osd_object_print,
8521         .loo_object_invariant = osd_object_invariant
8522 };
8523
8524 const struct lu_device_operations osd_lu_ops = {
8525         .ldo_object_alloc      = osd_object_alloc,
8526         .ldo_process_config    = osd_process_config,
8527         .ldo_recovery_complete = osd_recovery_complete,
8528         .ldo_prepare           = osd_prepare,
8529         .ldo_fid_alloc         = osd_fid_alloc,
8530 };
8531
8532 static const struct lu_device_type_operations osd_device_type_ops = {
8533         .ldto_init = osd_type_init,
8534         .ldto_fini = osd_type_fini,
8535
8536         .ldto_start = osd_type_start,
8537         .ldto_stop  = osd_type_stop,
8538
8539         .ldto_device_alloc = osd_device_alloc,
8540         .ldto_device_free  = osd_device_free,
8541
8542         .ldto_device_init = osd_device_init,
8543         .ldto_device_fini = osd_device_fini
8544 };
8545
8546 static struct lu_device_type osd_device_type = {
8547         .ldt_tags     = LU_DEVICE_DT,
8548         .ldt_name     = LUSTRE_OSD_LDISKFS_NAME,
8549         .ldt_ops      = &osd_device_type_ops,
8550         .ldt_ctx_tags = LCT_LOCAL,
8551 };
8552
8553 static int osd_health_check(const struct lu_env *env, struct obd_device *obd)
8554 {
8555         struct osd_device *osd = osd_dev(obd->obd_lu_dev);
8556         struct super_block *sb = osd_sb(osd);
8557
8558         return (osd->od_mnt == NULL || sb->s_flags & SB_RDONLY);
8559 }
8560
8561 /*
8562  * lprocfs legacy support.
8563  */
8564 static const struct obd_ops osd_obd_device_ops = {
8565         .o_owner = THIS_MODULE,
8566         .o_connect      = osd_obd_connect,
8567         .o_disconnect   = osd_obd_disconnect,
8568         .o_health_check = osd_health_check,
8569 };
8570
8571 static ssize_t track_declares_assert_show(struct kobject *kobj,
8572                                    struct attribute *attr,
8573                                    char *buf)
8574 {
8575         return sprintf(buf, "%d\n", ldiskfs_track_declares_assert);
8576 }
8577
8578 static ssize_t track_declares_assert_store(struct kobject *kobj,
8579                                            struct attribute *attr,
8580                                            const char *buffer, size_t count)
8581 {
8582         bool track_declares_assert;
8583         int rc;
8584
8585         rc = kstrtobool(buffer, &track_declares_assert);
8586         if (rc)
8587                 return rc;
8588
8589         ldiskfs_track_declares_assert = track_declares_assert;
8590
8591         return count;
8592 }
8593 LUSTRE_RW_ATTR(track_declares_assert);
8594
8595 static int __init osd_init(void)
8596 {
8597         struct kobject *kobj;
8598         int rc;
8599
8600         BUILD_BUG_ON(BH_DXLock >=
8601                      sizeof(((struct buffer_head *)0)->b_state) * 8);
8602 #if !defined(CONFIG_DEBUG_MUTEXES) && !defined(CONFIG_DEBUG_SPINLOCK)
8603         /* please, try to keep osd_thread_info smaller than a page */
8604         BUILD_BUG_ON(sizeof(struct osd_thread_info) > PAGE_SIZE);
8605 #endif
8606
8607         osd_oi_mod_init();
8608
8609         rc = lu_kmem_init(ldiskfs_caches);
8610         if (rc)
8611                 return rc;
8612
8613         rc = class_register_type(&osd_obd_device_ops, NULL, true,
8614                                  LUSTRE_OSD_LDISKFS_NAME, &osd_device_type);
8615         if (rc) {
8616                 lu_kmem_fini(ldiskfs_caches);
8617                 return rc;
8618         }
8619
8620         kobj = kset_find_obj(lustre_kset, LUSTRE_OSD_LDISKFS_NAME);
8621         if (kobj) {
8622                 rc = sysfs_create_file(kobj,
8623                                        &lustre_attr_track_declares_assert.attr);
8624                 kobject_put(kobj);
8625                 if (rc) {
8626                         CWARN("osd-ldiskfs: track_declares_assert failed to register with sysfs\n");
8627                         rc = 0;
8628                 }
8629         }
8630
8631         return rc;
8632 }
8633
8634 static void __exit osd_exit(void)
8635 {
8636         struct kobject *kobj;
8637
8638         kobj = kset_find_obj(lustre_kset, LUSTRE_OSD_LDISKFS_NAME);
8639         if (kobj) {
8640                 sysfs_remove_file(kobj,
8641                                   &lustre_attr_track_declares_assert.attr);
8642                 kobject_put(kobj);
8643         }
8644         class_unregister_type(LUSTRE_OSD_LDISKFS_NAME);
8645         lu_kmem_fini(ldiskfs_caches);
8646 }
8647
8648 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
8649 MODULE_DESCRIPTION("Lustre Object Storage Device ("LUSTRE_OSD_LDISKFS_NAME")");
8650 MODULE_VERSION(LUSTRE_VERSION_STRING);
8651 MODULE_LICENSE("GPL");
8652
8653 module_init(osd_init);
8654 module_exit(osd_exit);