lustre/osd-zfs/osd_object.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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2012, 2016, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  * Lustre is a trademark of Sun Microsystems, Inc.
  31  *
  32  * lustre/osd-zfs/osd_object.c
  33  *
  34  * Author: Alex Zhuravlev <bzzz@whamcloud.com>
  35  * Author: Mike Pershin <tappro@whamcloud.com>
  36  * Author: Johann Lombardi <johann@whamcloud.com>
  37  */
  38
  39 #define DEBUG_SUBSYSTEM S_OSD
  40
  41 #include <lustre_ver.h>
  42 #include <libcfs/libcfs.h>
  43 #include <obd_support.h>
  44 #include <lustre_net.h>
  45 #include <obd.h>
  46 #include <obd_class.h>
  47 #include <lustre_disk.h>
  48 #include <lustre_fid.h>
  49
  50 #include "osd_internal.h"
  51
  52 #include <sys/dnode.h>
  53 #include <sys/dbuf.h>
  54 #include <sys/spa.h>
  55 #include <sys/stat.h>
  56 #include <sys/zap.h>
  57 #include <sys/spa_impl.h>
  58 #include <sys/zfs_znode.h>
  59 #include <sys/dmu_tx.h>
  60 #include <sys/dmu_objset.h>
  61 #include <sys/dsl_prop.h>
  62 #include <sys/sa_impl.h>
  63 #include <sys/txg.h>
  64
  65 char *osd_obj_tag = "osd_object";
  66
  67 static struct dt_object_operations osd_obj_ops;
  68 static struct lu_object_operations osd_lu_obj_ops;
  69 extern struct dt_body_operations osd_body_ops;
  70 static struct dt_object_operations osd_obj_otable_it_ops;
  71
  72 extern struct kmem_cache *osd_object_kmem;
  73
  74 static void
  75 osd_object_sa_fini(struct osd_object *obj)
  76 {
  77         if (obj->oo_sa_hdl) {
  78                 sa_handle_destroy(obj->oo_sa_hdl);
  79                 obj->oo_sa_hdl = NULL;
  80         }
  81 }
  82
  83 static int
  84 osd_object_sa_init(struct osd_object *obj, struct osd_device *o)
  85 {
  86         int rc;
  87
  88         LASSERT(obj->oo_sa_hdl == NULL);
  89         LASSERT(obj->oo_dn != NULL);
  90
  91         rc = -sa_handle_get(o->od_os, obj->oo_dn->dn_object, obj,
  92                             SA_HDL_PRIVATE, &obj->oo_sa_hdl);
  93         if (rc)
  94                 return rc;
  95
  96         /* Cache the xattr object id, valid for the life of the object */
  97         rc = -sa_lookup(obj->oo_sa_hdl, SA_ZPL_XATTR(o), &obj->oo_xattr, 8);
  98         if (rc == -ENOENT) {
  99                 obj->oo_xattr = ZFS_NO_OBJECT;
 100                 rc = 0;
 101         } else if (rc) {
 102                 osd_object_sa_fini(obj);
 103         }
 104
 105         return rc;
 106 }
 107
 108 /*
 109  * Add object to list of dirty objects in tx handle.
 110  */
 111 static void
 112 osd_object_sa_dirty_add(struct osd_object *obj, struct osd_thandle *oh)
 113 {
 114         if (!list_empty(&obj->oo_sa_linkage))
 115                 return;
 116
 117         down(&oh->ot_sa_lock);
 118         write_lock(&obj->oo_attr_lock);
 119         if (likely(list_empty(&obj->oo_sa_linkage)))
 120                 list_add(&obj->oo_sa_linkage, &oh->ot_sa_list);
 121         write_unlock(&obj->oo_attr_lock);
 122         up(&oh->ot_sa_lock);
 123 }
 124
 125 /*
 126  * Release spill block dbuf hold for all dirty SAs.
 127  */
 128 void osd_object_sa_dirty_rele(struct osd_thandle *oh)
 129 {
 130         struct osd_object *obj;
 131
 132         down(&oh->ot_sa_lock);
 133         while (!list_empty(&oh->ot_sa_list)) {
 134                 obj = list_entry(oh->ot_sa_list.next,
 135                                  struct osd_object, oo_sa_linkage);
 136                 sa_spill_rele(obj->oo_sa_hdl);
 137                 write_lock(&obj->oo_attr_lock);
 138                 list_del_init(&obj->oo_sa_linkage);
 139                 write_unlock(&obj->oo_attr_lock);
 140         }
 141         up(&oh->ot_sa_lock);
 142 }
 143
 144 /*
 145  * Update the SA and add the object to the dirty list.
 146  */
 147 int osd_object_sa_update(struct osd_object *obj, sa_attr_type_t type,
 148                          void *buf, uint32_t buflen, struct osd_thandle *oh)
 149 {
 150         int rc;
 151
 152         LASSERT(obj->oo_sa_hdl != NULL);
 153         LASSERT(oh->ot_tx != NULL);
 154
 155         rc = -sa_update(obj->oo_sa_hdl, type, buf, buflen, oh->ot_tx);
 156         osd_object_sa_dirty_add(obj, oh);
 157
 158         return rc;
 159 }
 160
 161 /*
 162  * Bulk update the SA and add the object to the dirty list.
 163  */
 164 static int
 165 osd_object_sa_bulk_update(struct osd_object *obj, sa_bulk_attr_t *attrs,
 166                           int count, struct osd_thandle *oh)
 167 {
 168         int rc;
 169
 170         LASSERT(obj->oo_sa_hdl != NULL);
 171         LASSERT(oh->ot_tx != NULL);
 172
 173         rc = -sa_bulk_update(obj->oo_sa_hdl, attrs, count, oh->ot_tx);
 174         osd_object_sa_dirty_add(obj, oh);
 175
 176         return rc;
 177 }
 178
 179 /*
 180  * Retrieve the attributes of a DMU object
 181  */
 182 int __osd_object_attr_get(const struct lu_env *env, struct osd_device *o,
 183                           struct osd_object *obj, struct lu_attr *la)
 184 {
 185         struct osa_attr *osa = &osd_oti_get(env)->oti_osa;
 186         sa_bulk_attr_t  *bulk = osd_oti_get(env)->oti_attr_bulk;
 187         sa_handle_t     *sa_hdl;
 188         int              cnt = 0;
 189         int              rc;
 190         ENTRY;
 191
 192         LASSERT(obj->oo_dn != NULL);
 193
 194         rc = -sa_handle_get(o->od_os, obj->oo_dn->dn_object, NULL,
 195                             SA_HDL_PRIVATE, &sa_hdl);
 196         if (rc)
 197                 RETURN(rc);
 198
 199         la->la_valid |= LA_ATIME | LA_MTIME | LA_CTIME | LA_MODE | LA_TYPE |
 200                         LA_SIZE | LA_UID | LA_GID | LA_FLAGS | LA_NLINK;
 201
 202         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(o), NULL, osa->atime, 16);
 203         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(o), NULL, osa->mtime, 16);
 204         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(o), NULL, osa->ctime, 16);
 205         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(o), NULL, &osa->mode, 8);
 206         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(o), NULL, &osa->size, 8);
 207         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(o), NULL, &osa->nlink, 8);
 208         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(o), NULL, &osa->uid, 8);
 209         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(o), NULL, &osa->gid, 8);
 210         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(o), NULL, &osa->flags, 8);
 211         LASSERT(cnt <= ARRAY_SIZE(osd_oti_get(env)->oti_attr_bulk));
 212
 213         rc = -sa_bulk_lookup(sa_hdl, bulk, cnt);
 214         if (rc)
 215                 GOTO(out_sa, rc);
 216
 217         la->la_atime = osa->atime[0];
 218         la->la_mtime = osa->mtime[0];
 219         la->la_ctime = osa->ctime[0];
 220         la->la_mode = osa->mode;
 221         la->la_uid = osa->uid;
 222         la->la_gid = osa->gid;
 223         la->la_nlink = osa->nlink;
 224         la->la_flags = attrs_zfs2fs(osa->flags);
 225         la->la_size = osa->size;
 226
 227         /* Try to get extra flag from LMA. Right now, only LMAI_ORPHAN
 228          * flags is stored in LMA, and it is only for orphan directory */
 229         if (S_ISDIR(la->la_mode) && dt_object_exists(&obj->oo_dt)) {
 230                 struct osd_thread_info *info = osd_oti_get(env);
 231                 struct lustre_mdt_attrs *lma;
 232                 struct lu_buf buf;
 233
 234                 lma = (struct lustre_mdt_attrs *)info->oti_buf;
 235                 buf.lb_buf = lma;
 236                 buf.lb_len = sizeof(info->oti_buf);
 237                 rc = osd_xattr_get(env, &obj->oo_dt, &buf, XATTR_NAME_LMA);
 238                 if (rc > 0) {
 239                         rc = 0;
 240                         lma->lma_incompat = le32_to_cpu(lma->lma_incompat);
 241                         obj->oo_lma_flags =
 242                                 lma_to_lustre_flags(lma->lma_incompat);
 243
 244                 } else if (rc == -ENODATA) {
 245                         rc = 0;
 246                 }
 247         }
 248
 249         if (S_ISCHR(la->la_mode) || S_ISBLK(la->la_mode)) {
 250                 rc = -sa_lookup(sa_hdl, SA_ZPL_RDEV(o), &osa->rdev, 8);
 251                 if (rc)
 252                         GOTO(out_sa, rc);
 253                 la->la_rdev = osa->rdev;
 254                 la->la_valid |= LA_RDEV;
 255         }
 256 out_sa:
 257         sa_handle_destroy(sa_hdl);
 258
 259         RETURN(rc);
 260 }
 261
 262 int __osd_obj2dnode(const struct lu_env *env, objset_t *os,
 263                    uint64_t oid, dnode_t **dnp)
 264 {
 265         dmu_object_info_t *doi = &osd_oti_get(env)->oti_doi;
 266         dmu_buf_t *db;
 267         dmu_buf_impl_t *dbi;
 268         int rc;
 269
 270         rc = dmu_bonus_hold(os, oid, osd_obj_tag, &db);
 271         if (rc)
 272                 return rc;
 273
 274         dbi = (dmu_buf_impl_t *)db;
 275         DB_DNODE_ENTER(dbi);
 276         *dnp = DB_DNODE(dbi);
 277
 278         LASSERT(*dnp != NULL);
 279         dmu_object_info_from_dnode(*dnp, doi);
 280         if (unlikely (oid != DMU_USERUSED_OBJECT &&
 281             oid != DMU_GROUPUSED_OBJECT && doi->doi_bonus_type != DMU_OT_SA)) {
 282                 osd_dnode_rele(*dnp);
 283                 *dnp = NULL;
 284                 return -EINVAL;
 285         }
 286
 287         return 0;
 288 }
 289
 290 /*
 291  * Concurrency: no concurrent access is possible that early in object
 292  * life-cycle.
 293  */
 294 struct lu_object *osd_object_alloc(const struct lu_env *env,
 295                                    const struct lu_object_header *hdr,
 296                                    struct lu_device *d)
 297 {
 298         struct osd_object *mo;
 299
 300         OBD_SLAB_ALLOC_PTR_GFP(mo, osd_object_kmem, GFP_NOFS);
 301         if (mo != NULL) {
 302                 struct lu_object *l;
 303
 304                 l = &mo->oo_dt.do_lu;
 305                 dt_object_init(&mo->oo_dt, NULL, d);
 306                 mo->oo_dt.do_ops = &osd_obj_ops;
 307                 l->lo_ops = &osd_lu_obj_ops;
 308                 INIT_LIST_HEAD(&mo->oo_sa_linkage);
 309                 INIT_LIST_HEAD(&mo->oo_unlinked_linkage);
 310                 init_rwsem(&mo->oo_sem);
 311                 init_rwsem(&mo->oo_guard);
 312                 rwlock_init(&mo->oo_attr_lock);
 313                 mo->oo_destroy = OSD_DESTROY_NONE;
 314                 return l;
 315         } else {
 316                 return NULL;
 317         }
 318 }
 319
 320 /*
 321  * Concurrency: shouldn't matter.
 322  */
 323 int osd_object_init0(const struct lu_env *env, struct osd_object *obj)
 324 {
 325         struct osd_device       *osd = osd_obj2dev(obj);
 326         const struct lu_fid     *fid = lu_object_fid(&obj->oo_dt.do_lu);
 327         int                      rc = 0;
 328         ENTRY;
 329
 330         if (obj->oo_dn == NULL)
 331                 RETURN(0);
 332
 333         /* object exist */
 334
 335         rc = osd_object_sa_init(obj, osd);
 336         if (rc)
 337                 RETURN(rc);
 338
 339         /* cache attrs in object */
 340         rc = __osd_object_attr_get(env, osd, obj, &obj->oo_attr);
 341         if (rc)
 342                 RETURN(rc);
 343
 344         if (likely(!fid_is_acct(fid)))
 345                 /* no body operations for accounting objects */
 346                 obj->oo_dt.do_body_ops = &osd_body_ops;
 347
 348         /*
 349          * initialize object before marking it existing
 350          */
 351         obj->oo_dt.do_lu.lo_header->loh_attr |= obj->oo_attr.la_mode & S_IFMT;
 352
 353         smp_mb();
 354         obj->oo_dt.do_lu.lo_header->loh_attr |= LOHA_EXISTS;
 355
 356         RETURN(0);
 357 }
 358
 359 static int osd_check_lma(const struct lu_env *env, struct osd_object *obj)
 360 {
 361         struct osd_thread_info  *info = osd_oti_get(env);
 362         struct lu_buf           buf;
 363         int                     rc;
 364         struct lustre_mdt_attrs *lma;
 365         ENTRY;
 366
 367         CLASSERT(sizeof(info->oti_buf) >= sizeof(*lma));
 368         lma = (struct lustre_mdt_attrs *)info->oti_buf;
 369         buf.lb_buf = lma;
 370         buf.lb_len = sizeof(info->oti_buf);
 371
 372         rc = osd_xattr_get(env, &obj->oo_dt, &buf, XATTR_NAME_LMA);
 373         if (rc > 0) {
 374                 rc = 0;
 375                 lustre_lma_swab(lma);
 376                 if (unlikely((lma->lma_incompat & ~LMA_INCOMPAT_SUPP) ||
 377                              CFS_FAIL_CHECK(OBD_FAIL_OSD_LMA_INCOMPAT))) {
 378                         CWARN("%s: unsupported incompat LMA feature(s) %#x for "
 379                               "fid = "DFID"\n", osd_obj2dev(obj)->od_svname,
 380                               lma->lma_incompat & ~LMA_INCOMPAT_SUPP,
 381                               PFID(lu_object_fid(&obj->oo_dt.do_lu)));
 382                         rc = -EOPNOTSUPP;
 383                 }
 384         } else if (rc == -ENODATA) {
 385                 /* haven't initialize LMA xattr */
 386                 rc = 0;
 387         }
 388
 389         RETURN(rc);
 390 }
 391
 392 /*
 393  * Concurrency: no concurrent access is possible that early in object
 394  * life-cycle.
 395  */
 396 static int osd_object_init(const struct lu_env *env, struct lu_object *l,
 397                            const struct lu_object_conf *conf)
 398 {
 399         struct osd_object       *obj = osd_obj(l);
 400         struct osd_device       *osd = osd_obj2dev(obj);
 401         uint64_t                 oid;
 402         int                      rc;
 403         ENTRY;
 404
 405         LASSERT(osd_invariant(obj));
 406
 407         if (fid_is_otable_it(&l->lo_header->loh_fid)) {
 408                 obj->oo_dt.do_ops = &osd_obj_otable_it_ops;
 409                 l->lo_header->loh_attr |= LOHA_EXISTS;
 410                 RETURN(0);
 411         }
 412
 413         if (conf != NULL && conf->loc_flags & LOC_F_NEW)
 414                 GOTO(out, rc = 0);
 415
 416         rc = osd_fid_lookup(env, osd, lu_object_fid(l), &oid);
 417         if (rc == 0) {
 418                 LASSERT(obj->oo_dn == NULL);
 419                 rc = __osd_obj2dnode(env, osd->od_os, oid, &obj->oo_dn);
 420                 /* EEXIST will be returned if object is being deleted in ZFS */
 421                 if (rc == -EEXIST) {
 422                         rc = 0;
 423                         GOTO(out, rc);
 424                 }
 425                 if (rc != 0) {
 426                         CERROR("%s: lookup "DFID"/%#llx failed: rc = %d\n",
 427                                osd->od_svname, PFID(lu_object_fid(l)), oid, rc);
 428                         GOTO(out, rc);
 429                 }
 430                 LASSERT(obj->oo_dn);
 431                 rc = osd_object_init0(env, obj);
 432                 if (rc != 0)
 433                         GOTO(out, rc);
 434
 435                 rc = osd_check_lma(env, obj);
 436                 if (rc != 0)
 437                         GOTO(out, rc);
 438         } else if (rc == -ENOENT) {
 439                 rc = 0;
 440         }
 441         LASSERT(osd_invariant(obj));
 442 out:
 443         RETURN(rc);
 444 }
 445
 446 /*
 447  * Concurrency: no concurrent access is possible that late in object
 448  * life-cycle.
 449  */
 450 static void osd_object_free(const struct lu_env *env, struct lu_object *l)
 451 {
 452         struct osd_object *obj = osd_obj(l);
 453
 454         LASSERT(osd_invariant(obj));
 455
 456         dt_object_fini(&obj->oo_dt);
 457         OBD_SLAB_FREE_PTR(obj, osd_object_kmem);
 458 }
 459
 460 static int
 461 osd_object_unlinked_add(struct osd_object *obj, struct osd_thandle *oh)
 462 {
 463         int rc = -EBUSY;
 464
 465         LASSERT(obj->oo_destroy == OSD_DESTROY_ASYNC);
 466
 467         /* the object is supposed to be exclusively locked by
 468          * the caller (osd_object_destroy()), while the transaction
 469          * (oh) is per-thread and not shared */
 470         if (likely(list_empty(&obj->oo_unlinked_linkage))) {
 471                 list_add(&obj->oo_unlinked_linkage, &oh->ot_unlinked_list);
 472                 rc = 0;
 473         }
 474
 475         return rc;
 476 }
 477
 478 /* Default to max data size covered by a level-1 indirect block */
 479 static unsigned long osd_sync_destroy_max_size =
 480         1UL << (DN_MAX_INDBLKSHIFT - SPA_BLKPTRSHIFT + SPA_MAXBLOCKSHIFT);
 481 module_param(osd_sync_destroy_max_size, ulong, 0444);
 482 MODULE_PARM_DESC(osd_sync_destroy_max_size, "Maximum object size to use synchronous destroy.");
 483
 484 static inline void
 485 osd_object_set_destroy_type(struct osd_object *obj)
 486 {
 487         /*
 488          * Lock-less OST_WRITE can race with OST_DESTROY, so set destroy type
 489          * only once and use it consistently thereafter.
 490          */
 491         down_write(&obj->oo_guard);
 492         if (obj->oo_destroy == OSD_DESTROY_NONE) {
 493                 if (obj->oo_attr.la_size <= osd_sync_destroy_max_size)
 494                         obj->oo_destroy = OSD_DESTROY_SYNC;
 495                 else /* Larger objects are destroyed asynchronously */
 496                         obj->oo_destroy = OSD_DESTROY_ASYNC;
 497         }
 498         up_write(&obj->oo_guard);
 499 }
 500
 501 static int osd_declare_object_destroy(const struct lu_env *env,
 502                                       struct dt_object *dt,
 503                                       struct thandle *th)
 504 {
 505         const struct lu_fid     *fid = lu_object_fid(&dt->do_lu);
 506         struct osd_object       *obj = osd_dt_obj(dt);
 507         struct osd_device       *osd = osd_obj2dev(obj);
 508         struct osd_thandle      *oh;
 509         int                      rc;
 510         uint64_t                 zapid;
 511         ENTRY;
 512
 513         LASSERT(th != NULL);
 514         LASSERT(dt_object_exists(dt));
 515
 516         oh = container_of0(th, struct osd_thandle, ot_super);
 517         LASSERT(oh->ot_tx != NULL);
 518
 519         /* declare that we'll remove object from fid-dnode mapping */
 520         zapid = osd_get_name_n_idx(env, osd, fid, NULL, 0);
 521         dmu_tx_hold_zap(oh->ot_tx, zapid, FALSE, NULL);
 522
 523         osd_declare_xattrs_destroy(env, obj, oh);
 524
 525         /* declare that we'll remove object from inode accounting ZAPs */
 526         dmu_tx_hold_zap(oh->ot_tx, osd->od_iusr_oid, FALSE, NULL);
 527         dmu_tx_hold_zap(oh->ot_tx, osd->od_igrp_oid, FALSE, NULL);
 528
 529         /* one less inode */
 530         rc = osd_declare_quota(env, osd, obj->oo_attr.la_uid,
 531                                obj->oo_attr.la_gid, -1, oh, false, NULL, false);
 532         if (rc)
 533                 RETURN(rc);
 534
 535         /* data to be truncated */
 536         rc = osd_declare_quota(env, osd, obj->oo_attr.la_uid,
 537                                obj->oo_attr.la_gid, 0, oh, true, NULL, false);
 538         if (rc)
 539                 RETURN(rc);
 540
 541         osd_object_set_destroy_type(obj);
 542         if (obj->oo_destroy == OSD_DESTROY_SYNC)
 543                 dmu_tx_hold_free(oh->ot_tx, obj->oo_dn->dn_object,
 544                                  0, DMU_OBJECT_END);
 545         else
 546                 dmu_tx_hold_zap(oh->ot_tx, osd->od_unlinkedid, TRUE, NULL);
 547
 548         /* will help to find FID->ino when this object is being
 549          * added to PENDING/ */
 550         osd_idc_find_and_init(env, osd, obj);
 551
 552         RETURN(0);
 553 }
 554
 555 static int osd_object_destroy(const struct lu_env *env,
 556                               struct dt_object *dt, struct thandle *th)
 557 {
 558         struct osd_thread_info  *info = osd_oti_get(env);
 559         char                    *buf = info->oti_str;
 560         struct osd_object       *obj = osd_dt_obj(dt);
 561         struct osd_device       *osd = osd_obj2dev(obj);
 562         const struct lu_fid     *fid = lu_object_fid(&dt->do_lu);
 563         struct osd_thandle      *oh;
 564         int                      rc;
 565         uint64_t                 oid, zapid;
 566         ENTRY;
 567
 568         down_write(&obj->oo_guard);
 569
 570         if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
 571                 GOTO(out, rc = -ENOENT);
 572
 573         LASSERT(obj->oo_dn != NULL);
 574
 575         oh = container_of0(th, struct osd_thandle, ot_super);
 576         LASSERT(oh != NULL);
 577         LASSERT(oh->ot_tx != NULL);
 578
 579         /* remove obj ref from index dir (it depends) */
 580         zapid = osd_get_name_n_idx(env, osd, fid, buf, sizeof(info->oti_str));
 581         rc = -zap_remove(osd->od_os, zapid, buf, oh->ot_tx);
 582         if (rc) {
 583                 CERROR("%s: zap_remove(%s) failed: rc = %d\n",
 584                        osd->od_svname, buf, rc);
 585                 GOTO(out, rc);
 586         }
 587
 588         rc = osd_xattrs_destroy(env, obj, oh);
 589         if (rc) {
 590                 CERROR("%s: cannot destroy xattrs for %s: rc = %d\n",
 591                        osd->od_svname, buf, rc);
 592                 GOTO(out, rc);
 593         }
 594
 595         /* Remove object from inode accounting. It is not fatal for the destroy
 596          * operation if something goes wrong while updating accounting, but we
 597          * still log an error message to notify the administrator */
 598         rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
 599                                 obj->oo_attr.la_uid, -1, oh->ot_tx);
 600         if (rc)
 601                 CERROR("%s: failed to remove "DFID" from accounting ZAP for usr"
 602                        " %d: rc = %d\n", osd->od_svname, PFID(fid),
 603                        obj->oo_attr.la_uid, rc);
 604         rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
 605                                 obj->oo_attr.la_gid, -1, oh->ot_tx);
 606         if (rc)
 607                 CERROR("%s: failed to remove "DFID" from accounting ZAP for grp"
 608                        " %d: rc = %d\n", osd->od_svname, PFID(fid),
 609                        obj->oo_attr.la_gid, rc);
 610
 611         oid = obj->oo_dn->dn_object;
 612         if (unlikely(obj->oo_destroy == OSD_DESTROY_NONE)) {
 613                 /* this may happen if the destroy wasn't declared
 614                  * e.g. when the object is created and then destroyed
 615                  * in the same transaction - we don't need additional
 616                  * space for destroy specifically */
 617                 LASSERT(obj->oo_attr.la_size <= osd_sync_destroy_max_size);
 618                 rc = -dmu_object_free(osd->od_os, oid, oh->ot_tx);
 619                 if (rc)
 620                         CERROR("%s: failed to free %s %llu: rc = %d\n",
 621                                osd->od_svname, buf, oid, rc);
 622         } else if (obj->oo_destroy == OSD_DESTROY_SYNC) {
 623                 rc = -dmu_object_free(osd->od_os, oid, oh->ot_tx);
 624                 if (rc)
 625                         CERROR("%s: failed to free %s %llu: rc = %d\n",
 626                                osd->od_svname, buf, oid, rc);
 627         } else { /* asynchronous destroy */
 628                 rc = osd_object_unlinked_add(obj, oh);
 629                 if (rc)
 630                         GOTO(out, rc);
 631
 632                 rc = -zap_add_int(osd->od_os, osd->od_unlinkedid,
 633                                   oid, oh->ot_tx);
 634                 if (rc)
 635                         CERROR("%s: zap_add_int() failed %s %llu: rc = %d\n",
 636                                osd->od_svname, buf, oid, rc);
 637         }
 638
 639 out:
 640         /* not needed in the cache anymore */
 641         set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
 642         if (rc == 0)
 643                 obj->oo_destroyed = 1;
 644         up_write(&obj->oo_guard);
 645         RETURN (0);
 646 }
 647
 648 static void osd_object_delete(const struct lu_env *env, struct lu_object *l)
 649 {
 650         struct osd_object *obj = osd_obj(l);
 651
 652         if (obj->oo_dn != NULL) {
 653                 osd_object_sa_fini(obj);
 654                 if (obj->oo_sa_xattr) {
 655                         nvlist_free(obj->oo_sa_xattr);
 656                         obj->oo_sa_xattr = NULL;
 657                 }
 658                 osd_dnode_rele(obj->oo_dn);
 659                 list_del(&obj->oo_sa_linkage);
 660                 obj->oo_dn = NULL;
 661         }
 662 }
 663
 664 /*
 665  * Concurrency: ->loo_object_release() is called under site spin-lock.
 666  */
 667 static void osd_object_release(const struct lu_env *env,
 668                                struct lu_object *l)
 669 {
 670 }
 671
 672 /*
 673  * Concurrency: shouldn't matter.
 674  */
 675 static int osd_object_print(const struct lu_env *env, void *cookie,
 676                             lu_printer_t p, const struct lu_object *l)
 677 {
 678         struct osd_object *o = osd_obj(l);
 679
 680         return (*p)(env, cookie, LUSTRE_OSD_ZFS_NAME"-object@%p", o);
 681 }
 682
 683 static void osd_object_read_lock(const struct lu_env *env,
 684                                  struct dt_object *dt, unsigned role)
 685 {
 686         struct osd_object *obj = osd_dt_obj(dt);
 687
 688         LASSERT(osd_invariant(obj));
 689
 690         down_read_nested(&obj->oo_sem, role);
 691 }
 692
 693 static void osd_object_write_lock(const struct lu_env *env,
 694                                   struct dt_object *dt, unsigned role)
 695 {
 696         struct osd_object *obj = osd_dt_obj(dt);
 697
 698         LASSERT(osd_invariant(obj));
 699
 700         down_write_nested(&obj->oo_sem, role);
 701 }
 702
 703 static void osd_object_read_unlock(const struct lu_env *env,
 704                                    struct dt_object *dt)
 705 {
 706         struct osd_object *obj = osd_dt_obj(dt);
 707
 708         LASSERT(osd_invariant(obj));
 709         up_read(&obj->oo_sem);
 710 }
 711
 712 static void osd_object_write_unlock(const struct lu_env *env,
 713                                     struct dt_object *dt)
 714 {
 715         struct osd_object *obj = osd_dt_obj(dt);
 716
 717         LASSERT(osd_invariant(obj));
 718         up_write(&obj->oo_sem);
 719 }
 720
 721 static int osd_object_write_locked(const struct lu_env *env,
 722                                    struct dt_object *dt)
 723 {
 724         struct osd_object *obj = osd_dt_obj(dt);
 725         int rc = 1;
 726
 727         LASSERT(osd_invariant(obj));
 728
 729         if (down_write_trylock(&obj->oo_sem)) {
 730                 rc = 0;
 731                 up_write(&obj->oo_sem);
 732         }
 733         return rc;
 734 }
 735
 736 static int osd_attr_get(const struct lu_env *env,
 737                         struct dt_object *dt,
 738                         struct lu_attr *attr)
 739 {
 740         struct osd_object       *obj = osd_dt_obj(dt);
 741         uint64_t                 blocks;
 742         uint32_t                 blksize;
 743         int                      rc = 0;
 744
 745         down_read(&obj->oo_guard);
 746
 747         if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
 748                 GOTO(out, rc = -ENOENT);
 749
 750         LASSERT(osd_invariant(obj));
 751         LASSERT(obj->oo_dn);
 752
 753         read_lock(&obj->oo_attr_lock);
 754         *attr = obj->oo_attr;
 755         if (obj->oo_lma_flags & LUSTRE_ORPHAN_FL)
 756                 attr->la_flags |= LUSTRE_ORPHAN_FL;
 757         read_unlock(&obj->oo_attr_lock);
 758
 759         /* with ZFS_DEBUG zrl_add_debug() called by DB_DNODE_ENTER()
 760          * from within sa_object_size() can block on a mutex, so
 761          * we can't call sa_object_size() holding rwlock */
 762         sa_object_size(obj->oo_sa_hdl, &blksize, &blocks);
 763         /* we do not control size of indices, so always calculate
 764          * it from number of blocks reported by DMU */
 765         if (S_ISDIR(attr->la_mode))
 766                 attr->la_size = 512 * blocks;
 767         /* Block size may be not set; suggest maximal I/O transfers. */
 768         if (blksize == 0)
 769                 blksize = osd_spa_maxblocksize(
 770                         dmu_objset_spa(osd_obj2dev(obj)->od_os));
 771
 772         attr->la_blksize = blksize;
 773         attr->la_blocks = blocks;
 774         attr->la_valid |= LA_BLOCKS | LA_BLKSIZE;
 775
 776 out:
 777         up_read(&obj->oo_guard);
 778         return rc;
 779 }
 780
 781 /* Simple wrapper on top of qsd API which implement quota transfer for osd
 782  * setattr needs. As a reminder, only the root user can change ownership of
 783  * a file, that's why EDQUOT & EINPROGRESS errors are discarded */
 784 static inline int qsd_transfer(const struct lu_env *env,
 785                                struct qsd_instance *qsd,
 786                                struct lquota_trans *trans, int qtype,
 787                                __u64 orig_id, __u64 new_id, __u64 bspace,
 788                                struct lquota_id_info *qi)
 789 {
 790         int     rc;
 791
 792         if (unlikely(qsd == NULL))
 793                 return 0;
 794
 795         LASSERT(qtype >= 0 && qtype < LL_MAXQUOTAS);
 796         qi->lqi_type = qtype;
 797
 798         /* inode accounting */
 799         qi->lqi_is_blk = false;
 800
 801         /* one more inode for the new owner ... */
 802         qi->lqi_id.qid_uid = new_id;
 803         qi->lqi_space      = 1;
 804         rc = qsd_op_begin(env, qsd, trans, qi, NULL);
 805         if (rc == -EDQUOT || rc == -EINPROGRESS)
 806                 rc = 0;
 807         if (rc)
 808                 return rc;
 809
 810         /* and one less inode for the current id */
 811         qi->lqi_id.qid_uid = orig_id;;
 812         qi->lqi_space      = -1;
 813         /* can't get EDQUOT when reducing usage */
 814         rc = qsd_op_begin(env, qsd, trans, qi, NULL);
 815         if (rc == -EINPROGRESS)
 816                 rc = 0;
 817         if (rc)
 818                 return rc;
 819
 820         /* block accounting */
 821         qi->lqi_is_blk = true;
 822
 823         /* more blocks for the new owner ... */
 824         qi->lqi_id.qid_uid = new_id;
 825         qi->lqi_space      = bspace;
 826         rc = qsd_op_begin(env, qsd, trans, qi, NULL);
 827         if (rc == -EDQUOT || rc == -EINPROGRESS)
 828                 rc = 0;
 829         if (rc)
 830                 return rc;
 831
 832         /* and finally less blocks for the current owner */
 833         qi->lqi_id.qid_uid = orig_id;
 834         qi->lqi_space      = -bspace;
 835         rc = qsd_op_begin(env, qsd, trans, qi, NULL);
 836         /* can't get EDQUOT when reducing usage */
 837         if (rc == -EINPROGRESS)
 838                 rc = 0;
 839         return rc;
 840 }
 841
 842 static int osd_declare_attr_set(const struct lu_env *env,
 843                                 struct dt_object *dt,
 844                                 const struct lu_attr *attr,
 845                                 struct thandle *handle)
 846 {
 847         struct osd_thread_info  *info = osd_oti_get(env);
 848         struct osd_object       *obj = osd_dt_obj(dt);
 849         struct osd_device       *osd = osd_obj2dev(obj);
 850         dmu_tx_hold_t           *txh;
 851         struct osd_thandle      *oh;
 852         uint64_t                 bspace;
 853         uint32_t                 blksize;
 854         int                      rc = 0;
 855         bool                     found;
 856         ENTRY;
 857
 858
 859         LASSERT(handle != NULL);
 860         LASSERT(osd_invariant(obj));
 861
 862         oh = container_of0(handle, struct osd_thandle, ot_super);
 863
 864         down_read(&obj->oo_guard);
 865         if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
 866                 GOTO(out, rc = 0);
 867
 868         LASSERT(obj->oo_sa_hdl != NULL);
 869         LASSERT(oh->ot_tx != NULL);
 870         /* regular attributes are part of the bonus buffer */
 871         /* let's check whether this object is already part of
 872          * transaction.. */
 873         found = false;
 874         for (txh = list_head(&oh->ot_tx->tx_holds); txh;
 875              txh = list_next(&oh->ot_tx->tx_holds, txh)) {
 876                 if (txh->txh_dnode == NULL)
 877                         continue;
 878                 if (txh->txh_dnode->dn_object != obj->oo_dn->dn_object)
 879                         continue;
 880                 /* this object is part of the transaction already
 881                  * we don't need to declare bonus again */
 882                 found = true;
 883                 break;
 884         }
 885         if (!found)
 886                 dmu_tx_hold_bonus(oh->ot_tx, obj->oo_dn->dn_object);
 887         if (oh->ot_tx->tx_err != 0)
 888                 GOTO(out, rc = -oh->ot_tx->tx_err);
 889
 890         if (attr && attr->la_valid & LA_FLAGS) {
 891                 /* LMA is usually a part of bonus, no need to declare
 892                  * anything else */
 893         }
 894
 895         if (attr && (attr->la_valid & (LA_UID | LA_GID))) {
 896                 sa_object_size(obj->oo_sa_hdl, &blksize, &bspace);
 897                 bspace = toqb(bspace * blksize);
 898         }
 899
 900         if (attr && attr->la_valid & LA_UID) {
 901                 /* account for user inode tracking ZAP update */
 902                 dmu_tx_hold_zap(oh->ot_tx, osd->od_iusr_oid, FALSE, NULL);
 903
 904                 /* quota enforcement for user */
 905                 if (attr->la_uid != obj->oo_attr.la_uid) {
 906                         rc = qsd_transfer(env, osd->od_quota_slave,
 907                                           &oh->ot_quota_trans, USRQUOTA,
 908                                           obj->oo_attr.la_uid, attr->la_uid,
 909                                           bspace, &info->oti_qi);
 910                         if (rc)
 911                                 GOTO(out, rc);
 912                 }
 913         }
 914         if (attr && attr->la_valid & LA_GID) {
 915                 /* account for user inode tracking ZAP update */
 916                 dmu_tx_hold_zap(oh->ot_tx, osd->od_igrp_oid, FALSE, NULL);
 917
 918                 /* quota enforcement for group */
 919                 if (attr->la_gid != obj->oo_attr.la_gid) {
 920                         rc = qsd_transfer(env, osd->od_quota_slave,
 921                                           &oh->ot_quota_trans, GRPQUOTA,
 922                                           obj->oo_attr.la_gid, attr->la_gid,
 923                                           bspace, &info->oti_qi);
 924                         if (rc)
 925                                 GOTO(out, rc);
 926                 }
 927         }
 928
 929 out:
 930         up_read(&obj->oo_guard);
 931         RETURN(rc);
 932 }
 933
 934 /*
 935  * Set the attributes of an object
 936  *
 937  * The transaction passed to this routine must have
 938  * dmu_tx_hold_bonus(tx, oid) called and then assigned
 939  * to a transaction group.
 940  */
 941 static int osd_attr_set(const struct lu_env *env, struct dt_object *dt,
 942                         const struct lu_attr *la, struct thandle *handle)
 943 {
 944         struct osd_thread_info  *info = osd_oti_get(env);
 945         sa_bulk_attr_t          *bulk = osd_oti_get(env)->oti_attr_bulk;
 946         struct osd_object       *obj = osd_dt_obj(dt);
 947         struct osd_device       *osd = osd_obj2dev(obj);
 948         struct osd_thandle      *oh;
 949         struct osa_attr         *osa = &info->oti_osa;
 950         __u64                    valid = la->la_valid;
 951         int                      cnt;
 952         int                      rc = 0;
 953
 954         ENTRY;
 955
 956         down_read(&obj->oo_guard);
 957         if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
 958                 GOTO(out, rc = -ENOENT);
 959
 960         LASSERT(handle != NULL);
 961         LASSERT(osd_invariant(obj));
 962         LASSERT(obj->oo_sa_hdl);
 963
 964         oh = container_of0(handle, struct osd_thandle, ot_super);
 965         /* Assert that the transaction has been assigned to a
 966            transaction group. */
 967         LASSERT(oh->ot_tx->tx_txg != 0);
 968
 969         /* Only allow set size for regular file */
 970         if (!S_ISREG(dt->do_lu.lo_header->loh_attr))
 971                 valid &= ~(LA_SIZE | LA_BLOCKS);
 972
 973         if (valid & LA_CTIME && la->la_ctime == obj->oo_attr.la_ctime)
 974                 valid &= ~LA_CTIME;
 975
 976         if (valid & LA_MTIME && la->la_mtime == obj->oo_attr.la_mtime)
 977                 valid &= ~LA_MTIME;
 978
 979         if (valid & LA_ATIME && la->la_atime == obj->oo_attr.la_atime)
 980                 valid &= ~LA_ATIME;
 981
 982         if (valid == 0)
 983                 GOTO(out, rc = 0);
 984
 985         if (valid & LA_FLAGS) {
 986                 struct lustre_mdt_attrs *lma;
 987                 struct lu_buf buf;
 988
 989                 if (la->la_flags & LUSTRE_LMA_FL_MASKS) {
 990                         CLASSERT(sizeof(info->oti_buf) >= sizeof(*lma));
 991                         lma = (struct lustre_mdt_attrs *)&info->oti_buf;
 992                         buf.lb_buf = lma;
 993                         buf.lb_len = sizeof(info->oti_buf);
 994                         rc = osd_xattr_get(env, &obj->oo_dt, &buf,
 995                                            XATTR_NAME_LMA);
 996                         if (rc > 0) {
 997                                 lma->lma_incompat =
 998                                         le32_to_cpu(lma->lma_incompat);
 999                                 lma->lma_incompat |=
1000                                         lustre_to_lma_flags(la->la_flags);
1001                                 lma->lma_incompat =
1002                                         cpu_to_le32(lma->lma_incompat);
1003                                 buf.lb_buf = lma;
1004                                 buf.lb_len = sizeof(*lma);
1005                                 rc = osd_xattr_set_internal(env, obj, &buf,
1006                                                             XATTR_NAME_LMA,
1007                                                             LU_XATTR_REPLACE,
1008                                                             oh);
1009                         }
1010                         if (rc < 0) {
1011                                 CWARN("%s: failed to set LMA flags: rc = %d\n",
1012                                        osd->od_svname, rc);
1013                                 RETURN(rc);
1014                         }
1015                 }
1016         }
1017
1018         /* do both accounting updates outside oo_attr_lock below */
1019         if ((valid & LA_UID) && (la->la_uid != obj->oo_attr.la_uid)) {
1020                 /* Update user accounting. Failure isn't fatal, but we still
1021                  * log an error message */
1022                 rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
1023                                         la->la_uid, 1, oh->ot_tx);
1024                 if (rc)
1025                         CERROR("%s: failed to update accounting ZAP for user "
1026                                 "%d (%d)\n", osd->od_svname, la->la_uid, rc);
1027                 rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
1028                                         obj->oo_attr.la_uid, -1, oh->ot_tx);
1029                 if (rc)
1030                         CERROR("%s: failed to update accounting ZAP for user "
1031                                 "%d (%d)\n", osd->od_svname,
1032                                 obj->oo_attr.la_uid, rc);
1033         }
1034         if ((valid & LA_GID) && (la->la_gid != obj->oo_attr.la_gid)) {
1035                 /* Update group accounting. Failure isn't fatal, but we still
1036                  * log an error message */
1037                 rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
1038                                         la->la_gid, 1, oh->ot_tx);
1039                 if (rc)
1040                         CERROR("%s: failed to update accounting ZAP for user "
1041                                 "%d (%d)\n", osd->od_svname, la->la_gid, rc);
1042                 rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
1043                                         obj->oo_attr.la_gid, -1, oh->ot_tx);
1044                 if (rc)
1045                         CERROR("%s: failed to update accounting ZAP for user "
1046                                 "%d (%d)\n", osd->od_svname,
1047                                 obj->oo_attr.la_gid, rc);
1048         }
1049
1050         write_lock(&obj->oo_attr_lock);
1051         cnt = 0;
1052         if (valid & LA_ATIME) {
1053                 osa->atime[0] = obj->oo_attr.la_atime = la->la_atime;
1054                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(osd), NULL,
1055                                  osa->atime, 16);
1056         }
1057         if (valid & LA_MTIME) {
1058                 osa->mtime[0] = obj->oo_attr.la_mtime = la->la_mtime;
1059                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(osd), NULL,
1060                                  osa->mtime, 16);
1061         }
1062         if (valid & LA_CTIME) {
1063                 osa->ctime[0] = obj->oo_attr.la_ctime = la->la_ctime;
1064                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(osd), NULL,
1065                                  osa->ctime, 16);
1066         }
1067         if (valid & LA_MODE) {
1068                 /* mode is stored along with type, so read it first */
1069                 obj->oo_attr.la_mode = (obj->oo_attr.la_mode & S_IFMT) |
1070                         (la->la_mode & ~S_IFMT);
1071                 osa->mode = obj->oo_attr.la_mode;
1072                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(osd), NULL,
1073                                  &osa->mode, 8);
1074         }
1075         if (valid & LA_SIZE) {
1076                 osa->size = obj->oo_attr.la_size = la->la_size;
1077                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(osd), NULL,
1078                                  &osa->size, 8);
1079         }
1080         if (valid & LA_NLINK) {
1081                 osa->nlink = obj->oo_attr.la_nlink = la->la_nlink;
1082                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(osd), NULL,
1083                                  &osa->nlink, 8);
1084         }
1085         if (valid & LA_RDEV) {
1086                 osa->rdev = obj->oo_attr.la_rdev = la->la_rdev;
1087                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_RDEV(osd), NULL,
1088                                  &osa->rdev, 8);
1089         }
1090         if (valid & LA_FLAGS) {
1091                 osa->flags = attrs_fs2zfs(la->la_flags);
1092                 /* many flags are not supported by zfs, so ensure a good cached
1093                  * copy */
1094                 obj->oo_attr.la_flags = attrs_zfs2fs(osa->flags);
1095                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(osd), NULL,
1096                                  &osa->flags, 8);
1097         }
1098         if (valid & LA_UID) {
1099                 osa->uid = obj->oo_attr.la_uid = la->la_uid;
1100                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(osd), NULL,
1101                                  &osa->uid, 8);
1102         }
1103         if (valid & LA_GID) {
1104                 osa->gid = obj->oo_attr.la_gid = la->la_gid;
1105                 SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(osd), NULL,
1106                                  &osa->gid, 8);
1107         }
1108         obj->oo_attr.la_valid |= valid;
1109         write_unlock(&obj->oo_attr_lock);
1110
1111         LASSERT(cnt <= ARRAY_SIZE(osd_oti_get(env)->oti_attr_bulk));
1112         rc = osd_object_sa_bulk_update(obj, bulk, cnt, oh);
1113
1114 out:
1115         up_read(&obj->oo_guard);
1116         RETURN(rc);
1117 }
1118
1119 /*
1120  * Object creation.
1121  *
1122  * XXX temporary solution.
1123  */
1124
1125 static void osd_ah_init(const struct lu_env *env, struct dt_allocation_hint *ah,
1126                         struct dt_object *parent, struct dt_object *child,
1127                         umode_t child_mode)
1128 {
1129         LASSERT(ah);
1130
1131         ah->dah_parent = parent;
1132         ah->dah_mode = child_mode;
1133
1134         if (parent != NULL && !dt_object_remote(parent)) {
1135                 /* will help to find FID->ino at dt_insert("..") */
1136                 struct osd_object *pobj = osd_dt_obj(parent);
1137
1138                 osd_idc_find_and_init(env, osd_obj2dev(pobj), pobj);
1139         }
1140 }
1141
1142 static int osd_declare_object_create(const struct lu_env *env,
1143                                      struct dt_object *dt,
1144                                      struct lu_attr *attr,
1145                                      struct dt_allocation_hint *hint,
1146                                      struct dt_object_format *dof,
1147                                      struct thandle *handle)
1148 {
1149         const struct lu_fid     *fid = lu_object_fid(&dt->do_lu);
1150         struct osd_object       *obj = osd_dt_obj(dt);
1151         struct osd_device       *osd = osd_obj2dev(obj);
1152         struct osd_thandle      *oh;
1153         uint64_t                 zapid;
1154         int                      rc, dnode_size;
1155         ENTRY;
1156
1157         LASSERT(dof);
1158
1159         switch (dof->dof_type) {
1160                 case DFT_REGULAR:
1161                 case DFT_SYM:
1162                 case DFT_NODE:
1163                         if (obj->oo_dt.do_body_ops == NULL)
1164                                 obj->oo_dt.do_body_ops = &osd_body_ops;
1165                         break;
1166                 default:
1167                         break;
1168         }
1169
1170         LASSERT(handle != NULL);
1171         oh = container_of0(handle, struct osd_thandle, ot_super);
1172         LASSERT(oh->ot_tx != NULL);
1173
1174         /* this is the minimum set of EAs on every Lustre object */
1175         obj->oo_ea_in_bonus = ZFS_SA_BASE_ATTR_SIZE +
1176                                 sizeof(__u64) + /* VBR VERSION */
1177                                 sizeof(struct lustre_mdt_attrs); /* LMA */
1178         /* reserve 32 bytes for extra stuff like ACLs */
1179         dnode_size = size_roundup_power2(obj->oo_ea_in_bonus + 32);
1180
1181         switch (dof->dof_type) {
1182                 case DFT_DIR:
1183                         dt->do_index_ops = &osd_dir_ops;
1184                 case DFT_INDEX:
1185                         /* for zap create */
1186                         dmu_tx_hold_zap(oh->ot_tx, DMU_NEW_OBJECT, FALSE, NULL);
1187                         dmu_tx_hold_sa_create(oh->ot_tx, dnode_size);
1188                         break;
1189                 case DFT_REGULAR:
1190                 case DFT_SYM:
1191                 case DFT_NODE:
1192                         /* first, we'll create new object */
1193                         dmu_tx_hold_sa_create(oh->ot_tx, dnode_size);
1194                         break;
1195
1196                 default:
1197                         LBUG();
1198                         break;
1199         }
1200
1201         /* and we'll add it to some mapping */
1202         zapid = osd_get_name_n_idx(env, osd, fid, NULL, 0);
1203         dmu_tx_hold_zap(oh->ot_tx, zapid, TRUE, NULL);
1204
1205         /* we will also update inode accounting ZAPs */
1206         dmu_tx_hold_zap(oh->ot_tx, osd->od_iusr_oid, FALSE, NULL);
1207         dmu_tx_hold_zap(oh->ot_tx, osd->od_igrp_oid, FALSE, NULL);
1208
1209         /* will help to find FID->ino mapping at dt_insert() */
1210         osd_idc_find_and_init(env, osd, obj);
1211
1212         rc = osd_declare_quota(env, osd, attr->la_uid, attr->la_gid, 1, oh,
1213                                false, NULL, false);
1214
1215         RETURN(rc);
1216 }
1217
1218 int __osd_attr_init(const struct lu_env *env, struct osd_device *osd,
1219                     sa_handle_t *sa_hdl, dmu_tx_t *tx,
1220                     struct lu_attr *la, uint64_t parent)
1221 {
1222         sa_bulk_attr_t  *bulk = osd_oti_get(env)->oti_attr_bulk;
1223         struct osa_attr *osa = &osd_oti_get(env)->oti_osa;
1224         uint64_t         gen;
1225         uint64_t         crtime[2];
1226         timestruc_t      now;
1227         int              cnt;
1228         int              rc;
1229
1230         LASSERT(sa_hdl);
1231
1232         gen = dmu_tx_get_txg(tx);
1233         gethrestime(&now);
1234         ZFS_TIME_ENCODE(&now, crtime);
1235
1236         osa->atime[0] = la->la_atime;
1237         osa->ctime[0] = la->la_ctime;
1238         osa->mtime[0] = la->la_mtime;
1239         osa->mode = la->la_mode;
1240         osa->uid = la->la_uid;
1241         osa->gid = la->la_gid;
1242         osa->rdev = la->la_rdev;
1243         osa->nlink = la->la_nlink;
1244         osa->flags = attrs_fs2zfs(la->la_flags);
1245         osa->size  = la->la_size;
1246
1247         /*
1248          * we need to create all SA below upon object create.
1249          *
1250          * XXX The attribute order matters since the accounting callback relies
1251          * on static offsets (i.e. SA_*_OFFSET, see zfs_space_delta_cb()) to
1252          * look up the UID/GID attributes. Moreover, the callback does not seem
1253          * to support the spill block.
1254          * We define attributes in the same order as SA_*_OFFSET in order to
1255          * work around the problem. See ORI-610.
1256          */
1257         cnt = 0;
1258         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MODE(osd), NULL, &osa->mode, 8);
1259         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_SIZE(osd), NULL, &osa->size, 8);
1260         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GEN(osd), NULL, &gen, 8);
1261         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_UID(osd), NULL, &osa->uid, 8);
1262         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_GID(osd), NULL, &osa->gid, 8);
1263         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_PARENT(osd), NULL, &parent, 8);
1264         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_FLAGS(osd), NULL, &osa->flags, 8);
1265         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_ATIME(osd), NULL, osa->atime, 16);
1266         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_MTIME(osd), NULL, osa->mtime, 16);
1267         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CTIME(osd), NULL, osa->ctime, 16);
1268         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_CRTIME(osd), NULL, crtime, 16);
1269         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_LINKS(osd), NULL, &osa->nlink, 8);
1270         SA_ADD_BULK_ATTR(bulk, cnt, SA_ZPL_RDEV(osd), NULL, &osa->rdev, 8);
1271         LASSERT(cnt <= ARRAY_SIZE(osd_oti_get(env)->oti_attr_bulk));
1272
1273         rc = -sa_replace_all_by_template(sa_hdl, bulk, cnt, tx);
1274
1275         return rc;
1276 }
1277
1278 static int osd_find_new_dnode(const struct lu_env *env, dmu_tx_t *tx,
1279                               uint64_t oid, dnode_t **dnp)
1280 {
1281         dmu_tx_hold_t *txh;
1282         int rc = 0;
1283
1284         /* take dnode_t from tx to save on dnode#->dnode_t lookup */
1285         for (txh = list_tail(&tx->tx_holds); txh;
1286              txh = list_prev(&tx->tx_holds, txh)) {
1287                 dnode_t *dn = txh->txh_dnode;
1288                 dmu_buf_impl_t *db;
1289
1290                 if (dn == NULL)
1291                         continue;
1292                 if (dn->dn_object != oid)
1293                         continue;
1294                 db = dn->dn_bonus;
1295                 if (db == NULL) {
1296                         rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
1297                         if (dn->dn_bonus == NULL)
1298                                 dbuf_create_bonus(dn);
1299                         rw_exit(&dn->dn_struct_rwlock);
1300                 }
1301                 db = dn->dn_bonus;
1302                 LASSERT(db);
1303                 LASSERT(dn->dn_handle);
1304                 DB_DNODE_ENTER(db);
1305                 if (refcount_add(&db->db_holds, osd_obj_tag) == 1) {
1306                         refcount_add(&dn->dn_holds, tag);
1307                         atomic_inc_32(&dn->dn_dbufs_count);
1308                 }
1309                 *dnp = dn;
1310                 break;
1311         }
1312
1313         if (unlikely(*dnp == NULL))
1314                 rc = __osd_obj2dnode(env, tx->tx_objset, oid, dnp);
1315
1316         return rc;
1317 }
1318
1319 /*
1320  * The transaction passed to this routine must have
1321  * dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT) called and then assigned
1322  * to a transaction group.
1323  */
1324 int __osd_object_create(const struct lu_env *env, struct osd_object *obj,
1325                         dnode_t **dnp, dmu_tx_t *tx, struct lu_attr *la)
1326 {
1327         struct osd_device   *osd = osd_obj2dev(obj);
1328         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
1329         dmu_object_type_t    type = DMU_OT_PLAIN_FILE_CONTENTS;
1330         uint64_t oid;
1331
1332         /* Use DMU_OTN_UINT8_METADATA for local objects so their data blocks
1333          * would get an additional ditto copy */
1334         if (unlikely(S_ISREG(la->la_mode) &&
1335                      fid_seq_is_local_file(fid_seq(fid))))
1336                 type = DMU_OTN_UINT8_METADATA;
1337
1338         /* Create a new DMU object using the default dnode size. */
1339         oid = osd_dmu_object_alloc(osd->od_os, type, 0, 0, tx);
1340
1341         LASSERT(la->la_valid & LA_MODE);
1342         la->la_size = 0;
1343         la->la_nlink = 1;
1344
1345         return osd_find_new_dnode(env, tx, oid, dnp);
1346 }
1347
1348 /*
1349  * The transaction passed to this routine must have
1350  * dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, ...) called and then assigned
1351  * to a transaction group.
1352  *
1353  * Using ZAP_FLAG_HASH64 will force the ZAP to always be a FAT ZAP.
1354  * This is fine for directories today, because storing the FID in the dirent
1355  * will also require a FAT ZAP.  If there is a new type of micro ZAP created
1356  * then we might need to re-evaluate the use of this flag and instead do
1357  * a conversion from the different internal ZAP hash formats being used. */
1358 int __osd_zap_create(const struct lu_env *env, struct osd_device *osd,
1359                      dnode_t **dnp, dmu_tx_t *tx, struct lu_attr *la,
1360                      zap_flags_t flags)
1361 {
1362         uint64_t oid;
1363
1364         /* Assert that the transaction has been assigned to a
1365            transaction group. */
1366         LASSERT(tx->tx_txg != 0);
1367         *dnp = NULL;
1368
1369         oid = osd_zap_create_flags(osd->od_os, 0, flags | ZAP_FLAG_HASH64,
1370                                    DMU_OT_DIRECTORY_CONTENTS,
1371                                    14, /* == ZFS fzap_default_blockshift */
1372                                    DN_MAX_INDBLKSHIFT, /* indirect blockshift */
1373                                    0, tx);
1374
1375         la->la_size = 2;
1376         la->la_nlink = 1;
1377
1378         return osd_find_new_dnode(env, tx, oid, dnp);
1379 }
1380
1381 static dnode_t *osd_mkidx(const struct lu_env *env, struct osd_object *obj,
1382                           struct lu_attr *la, struct osd_thandle *oh)
1383 {
1384         dnode_t *dn;
1385         int rc;
1386
1387         /* Index file should be created as regular file in order not to confuse
1388          * ZPL which could interpret them as directory.
1389          * We set ZAP_FLAG_UINT64_KEY to let ZFS know than we are going to use
1390          * binary keys */
1391         LASSERT(S_ISREG(la->la_mode));
1392         rc = __osd_zap_create(env, osd_obj2dev(obj), &dn, oh->ot_tx, la,
1393                               ZAP_FLAG_UINT64_KEY);
1394         if (rc)
1395                 return ERR_PTR(rc);
1396         return dn;
1397 }
1398
1399 static dnode_t *osd_mkdir(const struct lu_env *env, struct osd_object *obj,
1400                           struct lu_attr *la, struct osd_thandle *oh)
1401 {
1402         dnode_t *dn;
1403         int rc;
1404
1405         LASSERT(S_ISDIR(la->la_mode));
1406         rc = __osd_zap_create(env, osd_obj2dev(obj), &dn, oh->ot_tx, la, 0);
1407         if (rc)
1408                 return ERR_PTR(rc);
1409         return dn;
1410 }
1411
1412 static dnode_t *osd_mkreg(const struct lu_env *env, struct osd_object *obj,
1413                           struct lu_attr *la, struct osd_thandle *oh)
1414 {
1415         const struct lu_fid *fid = lu_object_fid(&obj->oo_dt.do_lu);
1416         struct osd_device *osd = osd_obj2dev(obj);
1417         dnode_t *dn;
1418         int rc;
1419
1420         LASSERT(S_ISREG(la->la_mode));
1421         rc = __osd_object_create(env, obj, &dn, oh->ot_tx, la);
1422         if (rc)
1423                 return ERR_PTR(rc);
1424
1425         if ((fid_is_idif(fid) || fid_is_norm(fid) || fid_is_echo(fid)) &&
1426             osd->od_is_ost) {
1427                 /* The minimum block size must be at least page size otherwise
1428                  * it will break the assumption in tgt_thread_big_cache where
1429                  * the array size is PTLRPC_MAX_BRW_PAGES. It will also affect
1430                  * RDMA due to subpage transfer size */
1431                 rc = -dmu_object_set_blocksize(osd->od_os, dn->dn_object,
1432                                                PAGE_SIZE, 0, oh->ot_tx);
1433                 if (unlikely(rc)) {
1434                         CERROR("%s: can't change blocksize: %d\n",
1435                                osd->od_svname, rc);
1436                         return ERR_PTR(rc);
1437                 }
1438         }
1439
1440         return dn;
1441 }
1442
1443 static dnode_t *osd_mksym(const struct lu_env *env, struct osd_object *obj,
1444                           struct lu_attr *la, struct osd_thandle *oh)
1445 {
1446         dnode_t *dn;
1447         int rc;
1448
1449         LASSERT(S_ISLNK(la->la_mode));
1450         rc = __osd_object_create(env, obj, &dn, oh->ot_tx, la);
1451         if (rc)
1452                 return ERR_PTR(rc);
1453         return dn;
1454 }
1455
1456 static dnode_t *osd_mknod(const struct lu_env *env, struct osd_object *obj,
1457                           struct lu_attr *la, struct osd_thandle *oh)
1458 {
1459         dnode_t *dn;
1460         int rc;
1461
1462         if (S_ISCHR(la->la_mode) || S_ISBLK(la->la_mode))
1463                 la->la_valid |= LA_RDEV;
1464
1465         rc = __osd_object_create(env, obj, &dn, oh->ot_tx, la);
1466         if (rc)
1467                 return ERR_PTR(rc);
1468         return dn;
1469 }
1470
1471 typedef dnode_t *(*osd_obj_type_f)(const struct lu_env *env,
1472                                    struct osd_object *obj,
1473                                    struct lu_attr *la,
1474                                    struct osd_thandle *oh);
1475
1476 static osd_obj_type_f osd_create_type_f(enum dt_format_type type)
1477 {
1478         osd_obj_type_f result;
1479
1480         switch (type) {
1481         case DFT_DIR:
1482                 result = osd_mkdir;
1483                 break;
1484         case DFT_INDEX:
1485                 result = osd_mkidx;
1486                 break;
1487         case DFT_REGULAR:
1488                 result = osd_mkreg;
1489                 break;
1490         case DFT_SYM:
1491                 result = osd_mksym;
1492                 break;
1493         case DFT_NODE:
1494                 result = osd_mknod;
1495                 break;
1496         default:
1497                 LBUG();
1498                 break;
1499         }
1500         return result;
1501 }
1502
1503 /*
1504  * Concurrency: @dt is write locked.
1505  */
1506 static int osd_object_create(const struct lu_env *env, struct dt_object *dt,
1507                              struct lu_attr *attr,
1508                              struct dt_allocation_hint *hint,
1509                              struct dt_object_format *dof,
1510                              struct thandle *th)
1511 {
1512         struct osd_thread_info  *info = osd_oti_get(env);
1513         struct lustre_mdt_attrs *lma = &info->oti_mdt_attrs;
1514         struct zpl_direntry     *zde = &info->oti_zde.lzd_reg;
1515         const struct lu_fid     *fid = lu_object_fid(&dt->do_lu);
1516         struct osd_object       *obj = osd_dt_obj(dt);
1517         struct osd_device       *osd = osd_obj2dev(obj);
1518         char                    *buf = info->oti_str;
1519         struct osd_thandle      *oh;
1520         dnode_t *dn = NULL;
1521         uint64_t                 zapid, parent = 0;
1522         int                      rc;
1523
1524         ENTRY;
1525
1526         /* concurrent create declarations should not see
1527          * the object inconsistent (db, attr, etc).
1528          * in regular cases acquisition should be cheap */
1529         down_write(&obj->oo_guard);
1530
1531         if (unlikely(dt_object_exists(dt)))
1532                 GOTO(out, rc = -EEXIST);
1533
1534         LASSERT(osd_invariant(obj));
1535         LASSERT(dof != NULL);
1536
1537         LASSERT(th != NULL);
1538         oh = container_of0(th, struct osd_thandle, ot_super);
1539
1540         /*
1541          * XXX missing: Quote handling.
1542          */
1543
1544         LASSERT(obj->oo_dn == NULL);
1545
1546         /* to follow ZFS on-disk format we need
1547          * to initialize parent dnode properly */
1548         if (hint != NULL && hint->dah_parent != NULL &&
1549             !dt_object_remote(hint->dah_parent))
1550                 parent = osd_dt_obj(hint->dah_parent)->oo_dn->dn_object;
1551
1552         /* we may fix some attributes, better do not change the source */
1553         obj->oo_attr = *attr;
1554         obj->oo_attr.la_valid |= LA_SIZE | LA_NLINK | LA_TYPE;
1555
1556         dn = osd_create_type_f(dof->dof_type)(env, obj, &obj->oo_attr, oh);
1557         if (IS_ERR(dn)) {
1558                 rc = PTR_ERR(dn);
1559                 dn = NULL;
1560                 GOTO(out, rc);
1561         }
1562
1563         zde->zde_pad = 0;
1564         zde->zde_dnode = dn->dn_object;
1565         zde->zde_type = IFTODT(attr->la_mode & S_IFMT);
1566
1567         zapid = osd_get_name_n_idx(env, osd, fid, buf, sizeof(info->oti_str));
1568
1569         rc = -zap_add(osd->od_os, zapid, buf, 8, 1, zde, oh->ot_tx);
1570         if (rc)
1571                 GOTO(out, rc);
1572
1573         /* Now add in all of the "SA" attributes */
1574         rc = -sa_handle_get(osd->od_os, dn->dn_object, NULL,
1575                             SA_HDL_PRIVATE, &obj->oo_sa_hdl);
1576         if (rc)
1577                 GOTO(out, rc);
1578
1579         /* configure new osd object */
1580         obj->oo_dn = dn;
1581         parent = parent != 0 ? parent : zapid;
1582         rc = __osd_attr_init(env, osd, obj->oo_sa_hdl, oh->ot_tx,
1583                              &obj->oo_attr, parent);
1584         if (rc)
1585                 GOTO(out, rc);
1586
1587         /* XXX: oo_lma_flags */
1588         obj->oo_dt.do_lu.lo_header->loh_attr |= obj->oo_attr.la_mode & S_IFMT;
1589         smp_mb();
1590         obj->oo_dt.do_lu.lo_header->loh_attr |= LOHA_EXISTS;
1591         if (likely(!fid_is_acct(lu_object_fid(&obj->oo_dt.do_lu))))
1592                 /* no body operations for accounting objects */
1593                 obj->oo_dt.do_body_ops = &osd_body_ops;
1594
1595         rc = -nvlist_alloc(&obj->oo_sa_xattr, NV_UNIQUE_NAME, KM_SLEEP);
1596         if (rc)
1597                 GOTO(out, rc);
1598
1599         /* initialize LMA */
1600         lustre_lma_init(lma, lu_object_fid(&obj->oo_dt.do_lu), 0, 0);
1601         lustre_lma_swab(lma);
1602         rc = -nvlist_add_byte_array(obj->oo_sa_xattr, XATTR_NAME_LMA,
1603                                     (uchar_t *)lma, sizeof(*lma));
1604         if (rc)
1605                 GOTO(out, rc);
1606         rc = __osd_sa_xattr_update(env, obj, oh);
1607         if (rc)
1608                 GOTO(out, rc);
1609         osd_idc_find_and_init(env, osd, obj);
1610
1611         /* Add new object to inode accounting.
1612          * Errors are not considered as fatal */
1613         rc = -zap_increment_int(osd->od_os, osd->od_iusr_oid,
1614                                 (attr->la_valid & LA_UID) ? attr->la_uid : 0, 1,
1615                                 oh->ot_tx);
1616         if (rc)
1617                 CERROR("%s: failed to add "DFID" to accounting ZAP for usr %d "
1618                         "(%d)\n", osd->od_svname, PFID(fid), attr->la_uid, rc);
1619         rc = -zap_increment_int(osd->od_os, osd->od_igrp_oid,
1620                                 (attr->la_valid & LA_GID) ? attr->la_gid : 0, 1,
1621                                 oh->ot_tx);
1622         if (rc)
1623                 CERROR("%s: failed to add "DFID" to accounting ZAP for grp %d "
1624                         "(%d)\n", osd->od_svname, PFID(fid), attr->la_gid, rc);
1625
1626 out:
1627         if (unlikely(rc && dn)) {
1628                 dmu_object_free(osd->od_os, dn->dn_object, oh->ot_tx);
1629                 osd_dnode_rele(dn);
1630                 obj->oo_dn = NULL;
1631         }
1632         up_write(&obj->oo_guard);
1633         RETURN(rc);
1634 }
1635
1636 static int osd_declare_object_ref_add(const struct lu_env *env,
1637                                       struct dt_object *dt,
1638                                       struct thandle *th)
1639 {
1640         return osd_declare_attr_set(env, dt, NULL, th);
1641 }
1642
1643 /*
1644  * Concurrency: @dt is write locked.
1645  */
1646 static int osd_object_ref_add(const struct lu_env *env,
1647                               struct dt_object *dt,
1648                               struct thandle *handle)
1649 {
1650         struct osd_object       *obj = osd_dt_obj(dt);
1651         struct osd_thandle      *oh;
1652         struct osd_device       *osd = osd_obj2dev(obj);
1653         uint64_t                 nlink;
1654         int rc;
1655
1656         ENTRY;
1657
1658         down_read(&obj->oo_guard);
1659         if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
1660                 GOTO(out, rc = -ENOENT);
1661
1662         LASSERT(osd_invariant(obj));
1663         LASSERT(obj->oo_sa_hdl != NULL);
1664
1665         oh = container_of0(handle, struct osd_thandle, ot_super);
1666
1667         write_lock(&obj->oo_attr_lock);
1668         nlink = ++obj->oo_attr.la_nlink;
1669         write_unlock(&obj->oo_attr_lock);
1670
1671         rc = osd_object_sa_update(obj, SA_ZPL_LINKS(osd), &nlink, 8, oh);
1672
1673 out:
1674         up_read(&obj->oo_guard);
1675         RETURN(rc);
1676 }
1677
1678 static int osd_declare_object_ref_del(const struct lu_env *env,
1679                                       struct dt_object *dt,
1680                                       struct thandle *handle)
1681 {
1682         return osd_declare_attr_set(env, dt, NULL, handle);
1683 }
1684
1685 /*
1686  * Concurrency: @dt is write locked.
1687  */
1688 static int osd_object_ref_del(const struct lu_env *env,
1689                               struct dt_object *dt,
1690                               struct thandle *handle)
1691 {
1692         struct osd_object       *obj = osd_dt_obj(dt);
1693         struct osd_thandle      *oh;
1694         struct osd_device       *osd = osd_obj2dev(obj);
1695         uint64_t                 nlink;
1696         int                      rc;
1697
1698         ENTRY;
1699
1700         down_read(&obj->oo_guard);
1701
1702         if (unlikely(!dt_object_exists(dt) || obj->oo_destroyed))
1703                 GOTO(out, rc = -ENOENT);
1704
1705         LASSERT(osd_invariant(obj));
1706         LASSERT(obj->oo_sa_hdl != NULL);
1707
1708         oh = container_of0(handle, struct osd_thandle, ot_super);
1709         LASSERT(!lu_object_is_dying(dt->do_lu.lo_header));
1710
1711         write_lock(&obj->oo_attr_lock);
1712         nlink = --obj->oo_attr.la_nlink;
1713         write_unlock(&obj->oo_attr_lock);
1714
1715         rc = osd_object_sa_update(obj, SA_ZPL_LINKS(osd), &nlink, 8, oh);
1716
1717 out:
1718         up_read(&obj->oo_guard);
1719         RETURN(rc);
1720 }
1721
1722 static int osd_object_sync(const struct lu_env *env, struct dt_object *dt,
1723                            __u64 start, __u64 end)
1724 {
1725         struct osd_device *osd = osd_obj2dev(osd_dt_obj(dt));
1726         ENTRY;
1727
1728         /* XXX: no other option than syncing the whole filesystem until we
1729          * support ZIL.  If the object tracked the txg that it was last
1730          * modified in, it could pass that txg here instead of "0".  Maybe
1731          * the changes are already committed, so no wait is needed at all? */
1732         if (!osd->od_dt_dev.dd_rdonly)
1733                 txg_wait_synced(dmu_objset_pool(osd->od_os), 0ULL);
1734
1735         RETURN(0);
1736 }
1737
1738 static int osd_invalidate(const struct lu_env *env, struct dt_object *dt)
1739 {
1740         return 0;
1741 }
1742
1743 static struct dt_object_operations osd_obj_ops = {
1744         .do_read_lock           = osd_object_read_lock,
1745         .do_write_lock          = osd_object_write_lock,
1746         .do_read_unlock         = osd_object_read_unlock,
1747         .do_write_unlock        = osd_object_write_unlock,
1748         .do_write_locked        = osd_object_write_locked,
1749         .do_attr_get            = osd_attr_get,
1750         .do_declare_attr_set    = osd_declare_attr_set,
1751         .do_attr_set            = osd_attr_set,
1752         .do_ah_init             = osd_ah_init,
1753         .do_declare_create      = osd_declare_object_create,
1754         .do_create              = osd_object_create,
1755         .do_declare_destroy     = osd_declare_object_destroy,
1756         .do_destroy             = osd_object_destroy,
1757         .do_index_try           = osd_index_try,
1758         .do_declare_ref_add     = osd_declare_object_ref_add,
1759         .do_ref_add             = osd_object_ref_add,
1760         .do_declare_ref_del     = osd_declare_object_ref_del,
1761         .do_ref_del             = osd_object_ref_del,
1762         .do_xattr_get           = osd_xattr_get,
1763         .do_declare_xattr_set   = osd_declare_xattr_set,
1764         .do_xattr_set           = osd_xattr_set,
1765         .do_declare_xattr_del   = osd_declare_xattr_del,
1766         .do_xattr_del           = osd_xattr_del,
1767         .do_xattr_list          = osd_xattr_list,
1768         .do_object_sync         = osd_object_sync,
1769         .do_invalidate          = osd_invalidate,
1770 };
1771
1772 static struct lu_object_operations osd_lu_obj_ops = {
1773         .loo_object_init        = osd_object_init,
1774         .loo_object_delete      = osd_object_delete,
1775         .loo_object_release     = osd_object_release,
1776         .loo_object_free        = osd_object_free,
1777         .loo_object_print       = osd_object_print,
1778         .loo_object_invariant   = osd_object_invariant,
1779 };
1780
1781 static int osd_otable_it_attr_get(const struct lu_env *env,
1782                                 struct dt_object *dt,
1783                                 struct lu_attr *attr)
1784 {
1785         attr->la_valid = 0;
1786         return 0;
1787 }
1788
1789 static struct dt_object_operations osd_obj_otable_it_ops = {
1790         .do_attr_get    = osd_otable_it_attr_get,
1791         .do_index_try   = osd_index_try,
1792 };