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