lustre/osp/osp_dev.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.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osp/osp_dev.c
  37  *
  38  * Lustre OST Proxy Device
  39  *
  40  * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
  41  * Author: Mikhail Pershin <mike.pershin@intel.com>
  42  * Author: Di Wang <di.wang@intel.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_MDS
  46
  47 #include <obd_class.h>
  48 #include <lustre_param.h>
  49 #include <lustre_log.h>
  50 #include <lustre_mdc.h>
  51
  52 #include "osp_internal.h"
  53
  54 /* Slab for OSP object allocation */
  55 struct kmem_cache *osp_object_kmem;
  56
  57 static struct lu_kmem_descr osp_caches[] = {
  58         {
  59                 .ckd_cache = &osp_object_kmem,
  60                 .ckd_name  = "osp_obj",
  61                 .ckd_size  = sizeof(struct osp_object)
  62         },
  63         {
  64                 .ckd_cache = NULL
  65         }
  66 };
  67
  68 struct lu_object *osp_object_alloc(const struct lu_env *env,
  69                                    const struct lu_object_header *hdr,
  70                                    struct lu_device *d)
  71 {
  72         struct lu_object_header *h = NULL;
  73         struct osp_object       *o;
  74         struct lu_object        *l;
  75
  76         OBD_SLAB_ALLOC_PTR_GFP(o, osp_object_kmem, __GFP_IO);
  77         if (o != NULL) {
  78                 l = &o->opo_obj.do_lu;
  79
  80                 /* If hdr is NULL, it means the object is not built
  81                  * from the top dev(MDT/OST), usually it happens when
  82                  * building striped object, like data object on MDT or
  83                  * striped object for directory */
  84                 if (hdr == NULL) {
  85                         h = &o->opo_header;
  86                         lu_object_header_init(h);
  87                         dt_object_init(&o->opo_obj, h, d);
  88                         lu_object_add_top(h, l);
  89                 } else {
  90                         dt_object_init(&o->opo_obj, h, d);
  91                 }
  92
  93                 l->lo_ops = &osp_lu_obj_ops;
  94
  95                 return l;
  96         } else {
  97                 return NULL;
  98         }
  99 }
 100
 101 static struct dt_object
 102 *osp_find_or_create(const struct lu_env *env, struct osp_device *osp,
 103                     struct lu_attr *attr, __u32 reg_id)
 104 {
 105         struct osp_thread_info *osi = osp_env_info(env);
 106         struct dt_object_format dof = { 0 };
 107         struct dt_object       *dto;
 108         int                  rc;
 109         ENTRY;
 110
 111         lu_local_obj_fid(&osi->osi_fid, reg_id);
 112         attr->la_valid = LA_MODE;
 113         attr->la_mode = S_IFREG | 0644;
 114         dof.dof_type = DFT_REGULAR;
 115         dto = dt_find_or_create(env, osp->opd_storage, &osi->osi_fid,
 116                                 &dof, attr);
 117         if (IS_ERR(dto))
 118                 RETURN(dto);
 119
 120         rc = dt_attr_get(env, dto, attr, NULL);
 121         if (rc) {
 122                 CERROR("%s: can't be initialized: rc = %d\n",
 123                        osp->opd_obd->obd_name, rc);
 124                 lu_object_put(env, &dto->do_lu);
 125                 RETURN(ERR_PTR(rc));
 126         }
 127         RETURN(dto);
 128 }
 129
 130 static int osp_write_local_file(const struct lu_env *env,
 131                                 struct osp_device *osp,
 132                                 struct dt_object *dt_obj,
 133                                 struct lu_buf *buf,
 134                                 loff_t offset)
 135 {
 136         struct thandle *th;
 137         int rc;
 138
 139         th = dt_trans_create(env, osp->opd_storage);
 140         if (IS_ERR(th))
 141                 RETURN(PTR_ERR(th));
 142
 143         rc = dt_declare_record_write(env, dt_obj, buf->lb_len, offset, th);
 144         if (rc)
 145                 GOTO(out, rc);
 146         rc = dt_trans_start_local(env, osp->opd_storage, th);
 147         if (rc)
 148                 GOTO(out, rc);
 149
 150         rc = dt_record_write(env, dt_obj, buf, &offset, th);
 151 out:
 152         dt_trans_stop(env, osp->opd_storage, th);
 153         RETURN(rc);
 154 }
 155
 156 static int osp_init_last_objid(const struct lu_env *env, struct osp_device *osp)
 157 {
 158         struct osp_thread_info  *osi = osp_env_info(env);
 159         struct lu_fid           *fid = &osp->opd_last_used_fid;
 160         struct dt_object        *dto;
 161         int                     rc;
 162         ENTRY;
 163
 164         dto = osp_find_or_create(env, osp, &osi->osi_attr, MDD_LOV_OBJ_OID);
 165         if (IS_ERR(dto))
 166                 RETURN(PTR_ERR(dto));
 167         /* object will be released in device cleanup path */
 168         if (osi->osi_attr.la_size >=
 169             sizeof(osi->osi_id) * (osp->opd_index + 1)) {
 170                 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
 171                                    osp->opd_index);
 172                 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
 173                 if (rc != 0)
 174                         GOTO(out, rc);
 175         } else {
 176                 fid->f_oid = 0;
 177                 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
 178                                    osp->opd_index);
 179                 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
 180                                           osi->osi_off);
 181         }
 182         osp->opd_last_used_oid_file = dto;
 183         RETURN(0);
 184 out:
 185         /* object will be released in device cleanup path */
 186         CERROR("%s: can't initialize lov_objid: rc = %d\n",
 187                osp->opd_obd->obd_name, rc);
 188         lu_object_put(env, &dto->do_lu);
 189         osp->opd_last_used_oid_file = NULL;
 190         RETURN(rc);
 191 }
 192
 193 static int osp_init_last_seq(const struct lu_env *env, struct osp_device *osp)
 194 {
 195         struct osp_thread_info  *osi = osp_env_info(env);
 196         struct lu_fid           *fid = &osp->opd_last_used_fid;
 197         struct dt_object        *dto;
 198         int                     rc;
 199         ENTRY;
 200
 201         dto = osp_find_or_create(env, osp, &osi->osi_attr, MDD_LOV_OBJ_OSEQ);
 202         if (IS_ERR(dto))
 203                 RETURN(PTR_ERR(dto));
 204
 205         /* object will be released in device cleanup path */
 206         if (osi->osi_attr.la_size >=
 207             sizeof(osi->osi_id) * (osp->opd_index + 1)) {
 208                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
 209                                    osp->opd_index);
 210                 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
 211                 if (rc != 0)
 212                         GOTO(out, rc);
 213         } else {
 214                 fid->f_seq = 0;
 215                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
 216                                     osp->opd_index);
 217                 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
 218                                           osi->osi_off);
 219         }
 220         osp->opd_last_used_seq_file = dto;
 221         RETURN(0);
 222 out:
 223         /* object will be released in device cleanup path */
 224         CERROR("%s: can't initialize lov_seq: rc = %d\n",
 225                osp->opd_obd->obd_name, rc);
 226         lu_object_put(env, &dto->do_lu);
 227         osp->opd_last_used_seq_file = NULL;
 228         RETURN(rc);
 229 }
 230
 231 static int osp_last_used_init(const struct lu_env *env, struct osp_device *osp)
 232 {
 233         struct osp_thread_info *osi = osp_env_info(env);
 234         int                  rc;
 235         ENTRY;
 236
 237         fid_zero(&osp->opd_last_used_fid);
 238         rc = osp_init_last_objid(env, osp);
 239         if (rc < 0) {
 240                 CERROR("%s: Can not get ids %d from old objid!\n",
 241                        osp->opd_obd->obd_name, rc);
 242                 RETURN(rc);
 243         }
 244
 245         rc = osp_init_last_seq(env, osp);
 246         if (rc < 0) {
 247                 CERROR("%s: Can not get ids %d from old objid!\n",
 248                        osp->opd_obd->obd_name, rc);
 249                 GOTO(out, rc);
 250         }
 251
 252         if (fid_oid(&osp->opd_last_used_fid) != 0 &&
 253             fid_seq(&osp->opd_last_used_fid) == 0) {
 254                 /* Just upgrade from the old version,
 255                  * set the seq to be IDIF */
 256                 osp->opd_last_used_fid.f_seq =
 257                    fid_idif_seq(fid_oid(&osp->opd_last_used_fid),
 258                                 osp->opd_index);
 259                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off,
 260                                     &osp->opd_last_used_fid.f_seq,
 261                                     osp->opd_index);
 262                 rc = osp_write_local_file(env, osp, osp->opd_last_used_seq_file,
 263                                           &osi->osi_lb, osi->osi_off);
 264                 if (rc) {
 265                         CERROR("%s : Can not write seq file: rc = %d\n",
 266                                osp->opd_obd->obd_name, rc);
 267                         GOTO(out, rc);
 268                 }
 269         }
 270
 271         if (!fid_is_zero(&osp->opd_last_used_fid) &&
 272                  !fid_is_sane(&osp->opd_last_used_fid)) {
 273                 CERROR("%s: Got invalid FID "DFID"\n", osp->opd_obd->obd_name,
 274                         PFID(&osp->opd_last_used_fid));
 275                 GOTO(out, rc = -EINVAL);
 276         }
 277
 278         CDEBUG(D_INFO, "%s: Init last used fid "DFID"\n",
 279                osp->opd_obd->obd_name, PFID(&osp->opd_last_used_fid));
 280 out:
 281         if (rc != 0) {
 282                 if (osp->opd_last_used_oid_file != NULL) {
 283                         lu_object_put(env, &osp->opd_last_used_oid_file->do_lu);
 284                         osp->opd_last_used_oid_file = NULL;
 285                 }
 286                 if (osp->opd_last_used_seq_file != NULL) {
 287                         lu_object_put(env, &osp->opd_last_used_seq_file->do_lu);
 288                         osp->opd_last_used_seq_file = NULL;
 289                 }
 290         }
 291
 292         RETURN(rc);
 293 }
 294
 295 static void osp_last_used_fini(const struct lu_env *env, struct osp_device *d)
 296 {
 297         /* release last_used file */
 298         if (d->opd_last_used_oid_file != NULL) {
 299                 lu_object_put(env, &d->opd_last_used_oid_file->do_lu);
 300                 d->opd_last_used_oid_file = NULL;
 301         }
 302
 303         if (d->opd_last_used_seq_file != NULL) {
 304                 lu_object_put(env, &d->opd_last_used_seq_file->do_lu);
 305                 d->opd_last_used_seq_file = NULL;
 306         }
 307 }
 308
 309 static int osp_disconnect(struct osp_device *d)
 310 {
 311         struct obd_import *imp;
 312         int rc = 0;
 313
 314         imp = d->opd_obd->u.cli.cl_import;
 315
 316         /* Mark import deactivated now, so we don't try to reconnect if any
 317          * of the cleanup RPCs fails (e.g. ldlm cancel, etc).  We don't
 318          * fully deactivate the import, or that would drop all requests. */
 319         LASSERT(imp != NULL);
 320         spin_lock(&imp->imp_lock);
 321         imp->imp_deactive = 1;
 322         spin_unlock(&imp->imp_lock);
 323
 324         ptlrpc_deactivate_import(imp);
 325
 326         /* Some non-replayable imports (MDS's OSCs) are pinged, so just
 327          * delete it regardless.  (It's safe to delete an import that was
 328          * never added.) */
 329         (void)ptlrpc_pinger_del_import(imp);
 330
 331         rc = ptlrpc_disconnect_import(imp, 0);
 332         if (rc == -ETIMEDOUT || rc == -ENOTCONN || rc == -ESHUTDOWN)
 333                 rc = 0;
 334         if (rc)
 335                 CERROR("%s: can't disconnect: rc = %d\n",
 336                        d->opd_obd->obd_name, rc);
 337
 338         ptlrpc_invalidate_import(imp);
 339
 340         RETURN(rc);
 341 }
 342
 343 static int osp_shutdown(const struct lu_env *env, struct osp_device *d)
 344 {
 345         int                      rc = 0;
 346         ENTRY;
 347
 348         LASSERT(env);
 349
 350         rc = osp_disconnect(d);
 351
 352         if (!d->opd_connect_mdt) {
 353                 /* stop sync thread */
 354                 osp_sync_fini(d);
 355
 356                 /* stop precreate thread */
 357                 osp_precreate_fini(d);
 358
 359                 /* release last_used file */
 360                 osp_last_used_fini(env, d);
 361         }
 362
 363         obd_fid_fini(d->opd_obd);
 364
 365         RETURN(rc);
 366 }
 367
 368 static int osp_process_config(const struct lu_env *env,
 369                               struct lu_device *dev, struct lustre_cfg *lcfg)
 370 {
 371         struct osp_device               *d = lu2osp_dev(dev);
 372         struct lprocfs_static_vars       lvars = { 0 };
 373         int                              rc;
 374
 375         ENTRY;
 376
 377         switch (lcfg->lcfg_command) {
 378         case LCFG_PRE_CLEANUP:
 379                 rc = osp_disconnect(d);
 380                 break;
 381         case LCFG_CLEANUP:
 382                 lu_dev_del_linkage(dev->ld_site, dev);
 383                 rc = osp_shutdown(env, d);
 384                 break;
 385         case LCFG_PARAM:
 386                 lprocfs_osp_init_vars(&lvars);
 387
 388                 LASSERT(d->opd_obd);
 389                 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
 390                                               lcfg, d->opd_obd);
 391                 if (rc > 0)
 392                         rc = 0;
 393                 if (rc == -ENOSYS) {
 394                         /* class_process_proc_param() haven't found matching
 395                          * parameter and returned ENOSYS so that layer(s)
 396                          * below could use that. But OSP is the bottom, so
 397                          * just ignore it */
 398                         CERROR("%s: unknown param %s\n",
 399                                (char *)lustre_cfg_string(lcfg, 0),
 400                                (char *)lustre_cfg_string(lcfg, 1));
 401                         rc = 0;
 402                 }
 403                 break;
 404         default:
 405                 CERROR("%s: unknown command %u\n",
 406                        (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
 407                 rc = 0;
 408                 break;
 409         }
 410
 411         RETURN(rc);
 412 }
 413
 414 static int osp_recovery_complete(const struct lu_env *env,
 415                                  struct lu_device *dev)
 416 {
 417         struct osp_device       *osp = lu2osp_dev(dev);
 418         int                      rc = 0;
 419
 420         ENTRY;
 421         osp->opd_recovery_completed = 1;
 422
 423         if (!osp->opd_connect_mdt && osp->opd_pre != NULL)
 424                 wake_up(&osp->opd_pre_waitq);
 425         RETURN(rc);
 426 }
 427
 428 const struct lu_device_operations osp_lu_ops = {
 429         .ldo_object_alloc       = osp_object_alloc,
 430         .ldo_process_config     = osp_process_config,
 431         .ldo_recovery_complete  = osp_recovery_complete,
 432 };
 433
 434 /**
 435  * provides with statfs from corresponded OST
 436  *
 437  */
 438 static int osp_statfs(const struct lu_env *env, struct dt_device *dev,
 439                       struct obd_statfs *sfs)
 440 {
 441         struct osp_device *d = dt2osp_dev(dev);
 442
 443         ENTRY;
 444
 445         if (unlikely(d->opd_imp_active == 0))
 446                 RETURN(-ENOTCONN);
 447
 448         if (d->opd_pre == NULL)
 449                 RETURN(0);
 450
 451         /* return recently updated data */
 452         *sfs = d->opd_statfs;
 453
 454         /*
 455          * layer above osp (usually lod) can use ffree to estimate
 456          * how many objects are available for immediate creation
 457          */
 458         spin_lock(&d->opd_pre_lock);
 459         LASSERTF(fid_seq(&d->opd_pre_last_created_fid) ==
 460                  fid_seq(&d->opd_pre_used_fid),
 461                  "last_created "DFID", next_fid "DFID"\n",
 462                  PFID(&d->opd_pre_last_created_fid),
 463                  PFID(&d->opd_pre_used_fid));
 464         sfs->os_fprecreated = fid_oid(&d->opd_pre_last_created_fid) -
 465                               fid_oid(&d->opd_pre_used_fid);
 466         sfs->os_fprecreated -= d->opd_pre_reserved;
 467         spin_unlock(&d->opd_pre_lock);
 468
 469         LASSERT(sfs->os_fprecreated <= OST_MAX_PRECREATE * 2);
 470
 471         CDEBUG(D_OTHER, "%s: "LPU64" blocks, "LPU64" free, "LPU64" avail, "
 472                LPU64" files, "LPU64" free files\n", d->opd_obd->obd_name,
 473                sfs->os_blocks, sfs->os_bfree, sfs->os_bavail,
 474                sfs->os_files, sfs->os_ffree);
 475         RETURN(0);
 476 }
 477
 478 static int osp_sync(const struct lu_env *env, struct dt_device *dev)
 479 {
 480         ENTRY;
 481
 482         /*
 483          * XXX: wake up sync thread, command it to start flushing asap?
 484          */
 485
 486         RETURN(0);
 487 }
 488
 489 const struct dt_device_operations osp_dt_ops = {
 490         .dt_statfs       = osp_statfs,
 491         .dt_sync         = osp_sync,
 492         .dt_trans_create = osp_trans_create,
 493         .dt_trans_start  = osp_trans_start,
 494         .dt_trans_stop   = osp_trans_stop,
 495 };
 496
 497 static int osp_connect_to_osd(const struct lu_env *env, struct osp_device *m,
 498                               const char *nextdev)
 499 {
 500         struct obd_connect_data *data = NULL;
 501         struct obd_device       *obd;
 502         int                      rc;
 503
 504         ENTRY;
 505
 506         LASSERT(m->opd_storage_exp == NULL);
 507
 508         OBD_ALLOC_PTR(data);
 509         if (data == NULL)
 510                 RETURN(-ENOMEM);
 511
 512         obd = class_name2obd(nextdev);
 513         if (obd == NULL) {
 514                 CERROR("%s: can't locate next device: %s\n",
 515                        m->opd_obd->obd_name, nextdev);
 516                 GOTO(out, rc = -ENOTCONN);
 517         }
 518
 519         rc = obd_connect(env, &m->opd_storage_exp, obd, &obd->obd_uuid, data,
 520                          NULL);
 521         if (rc) {
 522                 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
 523                        m->opd_obd->obd_name, nextdev, rc);
 524                 GOTO(out, rc);
 525         }
 526
 527         m->opd_dt_dev.dd_lu_dev.ld_site =
 528                 m->opd_storage_exp->exp_obd->obd_lu_dev->ld_site;
 529         LASSERT(m->opd_dt_dev.dd_lu_dev.ld_site);
 530         m->opd_storage = lu2dt_dev(m->opd_storage_exp->exp_obd->obd_lu_dev);
 531
 532 out:
 533         OBD_FREE_PTR(data);
 534         RETURN(rc);
 535 }
 536
 537 static int osp_init0(const struct lu_env *env, struct osp_device *m,
 538                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
 539 {
 540         struct obd_device       *obd;
 541         struct obd_import       *imp;
 542         class_uuid_t            uuid;
 543         char                    *src, *tgt, *mdt, *osdname = NULL;
 544         int                     rc;
 545         long                    idx;
 546
 547         ENTRY;
 548
 549         mutex_init(&m->opd_async_requests_mutex);
 550         obd = class_name2obd(lustre_cfg_string(cfg, 0));
 551         if (obd == NULL) {
 552                 CERROR("Cannot find obd with name %s\n",
 553                        lustre_cfg_string(cfg, 0));
 554                 RETURN(-ENODEV);
 555         }
 556         m->opd_obd = obd;
 557
 558         /* There is no record in the MDT configuration for the local disk
 559          * device, so we have to extract this from elsewhere in the profile.
 560          * The only information we get at setup is from the OSC records:
 561          * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
 562          * Note that 1.8 generated configs are missing the -MDTxxxx part.
 563          * We need to reconstruct the name of the underlying OSD from this:
 564          * {fsname}-{svname}-osd, for example "lustre-MDT0000-osd".  We
 565          * also need to determine the OST index from this - will be used
 566          * to calculate the offset in shared lov_objids file later */
 567
 568         src = lustre_cfg_string(cfg, 0);
 569         if (src == NULL)
 570                 RETURN(-EINVAL);
 571
 572         tgt = strrchr(src, '-');
 573         if (tgt == NULL) {
 574                 CERROR("%s: invalid target name %s\n",
 575                        m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 576                 RETURN(-EINVAL);
 577         }
 578
 579         if (strncmp(tgt, "-osc", 4) == 0) {
 580                 /* Old OSC name fsname-OSTXXXX-osc */
 581                 for (tgt--; tgt > src && *tgt != '-'; tgt--)
 582                         ;
 583                 if (tgt == src) {
 584                         CERROR("%s: invalid target name %s\n",
 585                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 586                         RETURN(-EINVAL);
 587                 }
 588
 589                 if (strncmp(tgt, "-OST", 4) != 0) {
 590                         CERROR("%s: invalid target name %s\n",
 591                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 592                         RETURN(-EINVAL);
 593                 }
 594
 595                 idx = simple_strtol(tgt + 4, &mdt, 16);
 596                 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
 597                         CERROR("%s: invalid OST index in '%s'\n",
 598                                m->opd_obd->obd_name, src);
 599                         RETURN(-EINVAL);
 600                 }
 601                 m->opd_index = idx;
 602                 m->opd_group = 0;
 603                 idx = tgt - src;
 604         } else {
 605                 /* New OSC name fsname-OSTXXXX-osc-MDTXXXX */
 606                 if (strncmp(tgt, "-MDT", 4) != 0 &&
 607                     strncmp(tgt, "-OST", 4) != 0) {
 608                         CERROR("%s: invalid target name %s\n",
 609                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 610                         RETURN(-EINVAL);
 611                 }
 612
 613                 idx = simple_strtol(tgt + 4, &mdt, 16);
 614                 if (*mdt != '\0' || idx > INT_MAX || idx < 0) {
 615                         CERROR("%s: invalid OST index in '%s'\n",
 616                                m->opd_obd->obd_name, src);
 617                         RETURN(-EINVAL);
 618                 }
 619
 620                 /* Get MDT index from the name and set it to opd_group,
 621                  * which will be used by OSP to connect with OST */
 622                 m->opd_group = idx;
 623                 if (tgt - src <= 12) {
 624                         CERROR("%s: invalid mdt index retrieve from %s\n",
 625                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 626                         RETURN(-EINVAL);
 627                 }
 628
 629                 if (strncmp(tgt - 12, "-MDT", 4) == 0)
 630                         m->opd_connect_mdt = 1;
 631
 632                 idx = simple_strtol(tgt - 8, &mdt, 16);
 633                 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
 634                         CERROR("%s: invalid OST index in '%s'\n",
 635                                m->opd_obd->obd_name, src);
 636                         RETURN(-EINVAL);
 637                 }
 638
 639                 m->opd_index = idx;
 640                 idx = tgt - src - 12;
 641         }
 642         /* check the fsname length, and after this everything else will fit */
 643         if (idx > MTI_NAME_MAXLEN) {
 644                 CERROR("%s: fsname too long in '%s'\n",
 645                        m->opd_obd->obd_name, src);
 646                 RETURN(-EINVAL);
 647         }
 648
 649         OBD_ALLOC(osdname, MAX_OBD_NAME);
 650         if (osdname == NULL)
 651                 RETURN(-ENOMEM);
 652
 653         memcpy(osdname, src, idx); /* copy just the fsname part */
 654         osdname[idx] = '\0';
 655
 656         mdt = strstr(mdt, "-MDT");
 657         if (mdt == NULL) /* 1.8 configs don't have "-MDT0000" at the end */
 658                 strcat(osdname, "-MDT0000");
 659         else
 660                 strcat(osdname, mdt);
 661         strcat(osdname, "-osd");
 662         CDEBUG(D_HA, "%s: connect to %s (%s)\n", obd->obd_name, osdname, src);
 663
 664         if (m->opd_connect_mdt) {
 665                 struct client_obd *cli = &m->opd_obd->u.cli;
 666
 667                 OBD_ALLOC(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
 668                 if (!cli->cl_rpc_lock)
 669                         GOTO(out_fini, rc = -ENOMEM);
 670                 osp_init_rpc_lock(cli->cl_rpc_lock);
 671         }
 672
 673         m->opd_dt_dev.dd_lu_dev.ld_ops = &osp_lu_ops;
 674         m->opd_dt_dev.dd_ops = &osp_dt_ops;
 675         obd->obd_lu_dev = &m->opd_dt_dev.dd_lu_dev;
 676
 677         rc = osp_connect_to_osd(env, m, osdname);
 678         if (rc)
 679                 GOTO(out_fini, rc);
 680
 681         rc = ptlrpcd_addref();
 682         if (rc)
 683                 GOTO(out_disconnect, rc);
 684
 685         rc = client_obd_setup(obd, cfg);
 686         if (rc) {
 687                 CERROR("%s: can't setup obd: %d\n", m->opd_obd->obd_name, rc);
 688                 GOTO(out_ref, rc);
 689         }
 690
 691         osp_lprocfs_init(m);
 692
 693         rc = obd_fid_init(m->opd_obd, NULL, m->opd_connect_mdt ?
 694                           LUSTRE_SEQ_METADATA : LUSTRE_SEQ_DATA);
 695         if (rc) {
 696                 CERROR("%s: fid init error: rc = %d\n",
 697                        m->opd_obd->obd_name, rc);
 698                 GOTO(out_proc, rc);
 699         }
 700
 701         if (!m->opd_connect_mdt) {
 702                 /* Initialize last id from the storage - will be
 703                  * used in orphan cleanup. */
 704                 rc = osp_last_used_init(env, m);
 705                 if (rc)
 706                         GOTO(out_proc, rc);
 707
 708
 709                 /* Initialize precreation thread, it handles new
 710                  * connections as well. */
 711                 rc = osp_init_precreate(m);
 712                 if (rc)
 713                         GOTO(out_last_used, rc);
 714                 /*
 715                  * Initialize synhronization mechanism taking
 716                  * care of propogating changes to OST in near
 717                  * transactional manner.
 718                  */
 719                 rc = osp_sync_init(env, m);
 720                 if (rc)
 721                         GOTO(out_precreat, rc);
 722         }
 723
 724         /*
 725          * Initiate connect to OST
 726          */
 727         ll_generate_random_uuid(uuid);
 728         class_uuid_unparse(uuid, &m->opd_cluuid);
 729
 730         imp = obd->u.cli.cl_import;
 731
 732         rc = ptlrpc_init_import(imp);
 733         if (rc)
 734                 GOTO(out, rc);
 735         if (osdname)
 736                 OBD_FREE(osdname, MAX_OBD_NAME);
 737         RETURN(0);
 738
 739 out:
 740         if (!m->opd_connect_mdt)
 741                 /* stop sync thread */
 742                 osp_sync_fini(m);
 743 out_precreat:
 744         /* stop precreate thread */
 745         if (!m->opd_connect_mdt)
 746                 osp_precreate_fini(m);
 747 out_last_used:
 748         if (!m->opd_connect_mdt)
 749                 osp_last_used_fini(env, m);
 750 out_proc:
 751         ptlrpc_lprocfs_unregister_obd(obd);
 752         lprocfs_obd_cleanup(obd);
 753         if (m->opd_symlink)
 754                 lprocfs_remove(&m->opd_symlink);
 755         client_obd_cleanup(obd);
 756 out_ref:
 757         ptlrpcd_decref();
 758 out_disconnect:
 759         if (m->opd_connect_mdt) {
 760                 struct client_obd *cli = &m->opd_obd->u.cli;
 761                 if (cli->cl_rpc_lock != NULL) {
 762                         OBD_FREE_PTR(cli->cl_rpc_lock);
 763                         cli->cl_rpc_lock = NULL;
 764                 }
 765         }
 766         obd_disconnect(m->opd_storage_exp);
 767 out_fini:
 768         if (osdname)
 769                 OBD_FREE(osdname, MAX_OBD_NAME);
 770         RETURN(rc);
 771 }
 772
 773 static struct lu_device *osp_device_free(const struct lu_env *env,
 774                                          struct lu_device *lu)
 775 {
 776         struct osp_device *m = lu2osp_dev(lu);
 777
 778         ENTRY;
 779
 780         if (cfs_atomic_read(&lu->ld_ref) && lu->ld_site) {
 781                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
 782                 lu_site_print(env, lu->ld_site, &msgdata, lu_cdebug_printer);
 783         }
 784         dt_device_fini(&m->opd_dt_dev);
 785         OBD_FREE_PTR(m);
 786         RETURN(NULL);
 787 }
 788
 789 static struct lu_device *osp_device_alloc(const struct lu_env *env,
 790                                           struct lu_device_type *t,
 791                                           struct lustre_cfg *lcfg)
 792 {
 793         struct osp_device *m;
 794         struct lu_device  *l;
 795
 796         OBD_ALLOC_PTR(m);
 797         if (m == NULL) {
 798                 l = ERR_PTR(-ENOMEM);
 799         } else {
 800                 int rc;
 801
 802                 l = osp2lu_dev(m);
 803                 dt_device_init(&m->opd_dt_dev, t);
 804                 rc = osp_init0(env, m, t, lcfg);
 805                 if (rc != 0) {
 806                         osp_device_free(env, l);
 807                         l = ERR_PTR(rc);
 808                 }
 809         }
 810         return l;
 811 }
 812
 813 static struct lu_device *osp_device_fini(const struct lu_env *env,
 814                                          struct lu_device *d)
 815 {
 816         struct osp_device *m = lu2osp_dev(d);
 817         struct obd_import *imp;
 818         int                rc;
 819
 820         ENTRY;
 821
 822         if (m->opd_async_requests != NULL) {
 823                 out_destroy_update_req(m->opd_async_requests);
 824                 m->opd_async_requests = NULL;
 825         }
 826
 827         if (m->opd_storage_exp)
 828                 obd_disconnect(m->opd_storage_exp);
 829
 830         imp = m->opd_obd->u.cli.cl_import;
 831
 832         if (imp->imp_rq_pool) {
 833                 ptlrpc_free_rq_pool(imp->imp_rq_pool);
 834                 imp->imp_rq_pool = NULL;
 835         }
 836
 837         if (m->opd_symlink)
 838                 lprocfs_remove(&m->opd_symlink);
 839
 840         LASSERT(m->opd_obd);
 841         ptlrpc_lprocfs_unregister_obd(m->opd_obd);
 842         lprocfs_obd_cleanup(m->opd_obd);
 843
 844         if (m->opd_connect_mdt) {
 845                 struct client_obd *cli = &m->opd_obd->u.cli;
 846                 if (cli->cl_rpc_lock != NULL) {
 847                         OBD_FREE_PTR(cli->cl_rpc_lock);
 848                         cli->cl_rpc_lock = NULL;
 849                 }
 850         }
 851
 852         rc = client_obd_cleanup(m->opd_obd);
 853         LASSERTF(rc == 0, "error %d\n", rc);
 854
 855         ptlrpcd_decref();
 856
 857         RETURN(NULL);
 858 }
 859
 860 static int osp_reconnect(const struct lu_env *env,
 861                          struct obd_export *exp, struct obd_device *obd,
 862                          struct obd_uuid *cluuid,
 863                          struct obd_connect_data *data,
 864                          void *localdata)
 865 {
 866         return 0;
 867 }
 868
 869 static int osp_prepare_fid_client(struct osp_device *osp)
 870 {
 871         LASSERT(osp->opd_obd->u.cli.cl_seq != NULL);
 872         if (osp->opd_obd->u.cli.cl_seq->lcs_exp != NULL)
 873                 return 0;
 874
 875         LASSERT(osp->opd_exp != NULL);
 876         osp->opd_obd->u.cli.cl_seq->lcs_exp =
 877                                 class_export_get(osp->opd_exp);
 878         return 0;
 879 }
 880
 881 /*
 882  * we use exports to track all LOD users
 883  */
 884 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
 885                            struct obd_device *obd, struct obd_uuid *cluuid,
 886                            struct obd_connect_data *data, void *localdata)
 887 {
 888         struct osp_device       *osp = lu2osp_dev(obd->obd_lu_dev);
 889         struct obd_connect_data *ocd;
 890         struct obd_import       *imp;
 891         struct lustre_handle     conn;
 892         int                      rc;
 893
 894         ENTRY;
 895
 896         CDEBUG(D_CONFIG, "connect #%d\n", osp->opd_connects);
 897
 898         rc = class_connect(&conn, obd, cluuid);
 899         if (rc)
 900                 RETURN(rc);
 901
 902         *exp = class_conn2export(&conn);
 903         /* Why should there ever be more than 1 connect? */
 904         osp->opd_connects++;
 905         LASSERT(osp->opd_connects == 1);
 906
 907         osp->opd_exp = *exp;
 908
 909         imp = osp->opd_obd->u.cli.cl_import;
 910         imp->imp_dlm_handle = conn;
 911
 912         LASSERT(data != NULL);
 913         LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
 914         ocd = &imp->imp_connect_data;
 915         *ocd = *data;
 916
 917         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 918
 919         ocd->ocd_version = LUSTRE_VERSION_CODE;
 920         ocd->ocd_index = data->ocd_index;
 921         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 922
 923         rc = ptlrpc_connect_import(imp);
 924         if (rc) {
 925                 CERROR("%s: can't connect obd: rc = %d\n", obd->obd_name, rc);
 926                 GOTO(out, rc);
 927         }
 928
 929         ptlrpc_pinger_add_import(imp);
 930 out:
 931         RETURN(rc);
 932 }
 933
 934 /*
 935  * once last export (we don't count self-export) disappeared
 936  * osp can be released
 937  */
 938 static int osp_obd_disconnect(struct obd_export *exp)
 939 {
 940         struct obd_device *obd = exp->exp_obd;
 941         struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
 942         int                rc;
 943         ENTRY;
 944
 945         /* Only disconnect the underlying layers on the final disconnect. */
 946         LASSERT(osp->opd_connects == 1);
 947         osp->opd_connects--;
 948
 949         rc = class_disconnect(exp);
 950         if (rc) {
 951                 CERROR("%s: class disconnect error: rc = %d\n",
 952                        obd->obd_name, rc);
 953                 RETURN(rc);
 954         }
 955
 956         /* destroy the device */
 957         class_manual_cleanup(obd);
 958
 959         RETURN(rc);
 960 }
 961
 962 /*
 963  * lprocfs helpers still use OBD API, let's keep obd_statfs() support
 964  */
 965 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
 966                           struct obd_statfs *osfs, __u64 max_age, __u32 flags)
 967 {
 968         struct obd_statfs       *msfs;
 969         struct ptlrpc_request   *req;
 970         struct obd_import       *imp = NULL;
 971         int                      rc;
 972
 973         ENTRY;
 974
 975         /* Since the request might also come from lprocfs, so we need
 976          * sync this with client_disconnect_export Bug15684 */
 977         down_read(&exp->exp_obd->u.cli.cl_sem);
 978         if (exp->exp_obd->u.cli.cl_import)
 979                 imp = class_import_get(exp->exp_obd->u.cli.cl_import);
 980         up_read(&exp->exp_obd->u.cli.cl_sem);
 981         if (!imp)
 982                 RETURN(-ENODEV);
 983
 984         /* We could possibly pass max_age in the request (as an absolute
 985          * timestamp or a "seconds.usec ago") so the target can avoid doing
 986          * extra calls into the filesystem if that isn't necessary (e.g.
 987          * during mount that would help a bit).  Having relative timestamps
 988          * is not so great if request processing is slow, while absolute
 989          * timestamps are not ideal because they need time synchronization. */
 990         req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 991
 992         class_import_put(imp);
 993
 994         if (req == NULL)
 995                 RETURN(-ENOMEM);
 996
 997         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
 998         if (rc) {
 999                 ptlrpc_request_free(req);
1000                 RETURN(rc);
1001         }
1002         ptlrpc_request_set_replen(req);
1003         req->rq_request_portal = OST_CREATE_PORTAL;
1004         ptlrpc_at_set_req_timeout(req);
1005
1006         if (flags & OBD_STATFS_NODELAY) {
1007                 /* procfs requests not want stat in wait for avoid deadlock */
1008                 req->rq_no_resend = 1;
1009                 req->rq_no_delay = 1;
1010         }
1011
1012         rc = ptlrpc_queue_wait(req);
1013         if (rc)
1014                 GOTO(out, rc);
1015
1016         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1017         if (msfs == NULL)
1018                 GOTO(out, rc = -EPROTO);
1019
1020         *osfs = *msfs;
1021
1022         EXIT;
1023 out:
1024         ptlrpc_req_finished(req);
1025         return rc;
1026 }
1027
1028 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1029                             enum obd_import_event event)
1030 {
1031         struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1032
1033         switch (event) {
1034         case IMP_EVENT_DISCON:
1035                 d->opd_got_disconnected = 1;
1036                 d->opd_imp_connected = 0;
1037                 if (d->opd_connect_mdt)
1038                         break;
1039
1040                 if (d->opd_pre != NULL) {
1041                         osp_pre_update_status(d, -ENODEV);
1042                         wake_up(&d->opd_pre_waitq);
1043                 }
1044
1045                 CDEBUG(D_HA, "got disconnected\n");
1046                 break;
1047         case IMP_EVENT_INACTIVE:
1048                 d->opd_imp_active = 0;
1049                 if (d->opd_connect_mdt)
1050                         break;
1051
1052                 if (d->opd_pre != NULL) {
1053                         osp_pre_update_status(d, -ENODEV);
1054                         wake_up(&d->opd_pre_waitq);
1055                 }
1056
1057                 CDEBUG(D_HA, "got inactive\n");
1058                 break;
1059         case IMP_EVENT_ACTIVE:
1060                 d->opd_imp_active = 1;
1061
1062                 if (osp_prepare_fid_client(d) != 0)
1063                         break;
1064
1065                 if (d->opd_got_disconnected)
1066                         d->opd_new_connection = 1;
1067                 d->opd_imp_connected = 1;
1068                 d->opd_imp_seen_connected = 1;
1069                 if (d->opd_connect_mdt)
1070                         break;
1071
1072                 if (d->opd_pre != NULL)
1073                         wake_up(&d->opd_pre_waitq);
1074
1075                 __osp_sync_check_for_work(d);
1076                 CDEBUG(D_HA, "got connected\n");
1077                 break;
1078         case IMP_EVENT_INVALIDATE:
1079                 if (obd->obd_namespace == NULL)
1080                         break;
1081                 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1082                 break;
1083         case IMP_EVENT_OCD:
1084         case IMP_EVENT_DEACTIVATE:
1085         case IMP_EVENT_ACTIVATE:
1086                 break;
1087         default:
1088                 CERROR("%s: unsupported import event: %#x\n",
1089                        obd->obd_name, event);
1090         }
1091         return 0;
1092 }
1093
1094 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1095                          void *karg, void *uarg)
1096 {
1097         struct obd_device       *obd = exp->exp_obd;
1098         struct osp_device       *d;
1099         struct obd_ioctl_data   *data = karg;
1100         int                      rc = 0;
1101
1102         ENTRY;
1103
1104         LASSERT(obd->obd_lu_dev);
1105         d = lu2osp_dev(obd->obd_lu_dev);
1106         LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1107
1108         if (!try_module_get(THIS_MODULE)) {
1109                 CERROR("%s: can't get module. Is it alive?", obd->obd_name);
1110                 return -EINVAL;
1111         }
1112
1113         switch (cmd) {
1114         case OBD_IOC_CLIENT_RECOVER:
1115                 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1116                                            data->ioc_inlbuf1, 0);
1117                 if (rc > 0)
1118                         rc = 0;
1119                 break;
1120         case IOC_OSC_SET_ACTIVE:
1121                 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1122                                               data->ioc_offset);
1123                 break;
1124         case OBD_IOC_PING_TARGET:
1125                 rc = ptlrpc_obd_ping(obd);
1126                 break;
1127         default:
1128                 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1129                        cmd, current_comm());
1130                 rc = -ENOTTY;
1131         }
1132         module_put(THIS_MODULE);
1133         return rc;
1134 }
1135
1136 static int osp_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1137                             __u32 keylen, void *key, __u32 *vallen, void *val,
1138                             struct lov_stripe_md *lsm)
1139 {
1140         int rc = -EINVAL;
1141
1142         if (KEY_IS(KEY_OSP_CONNECTED)) {
1143                 struct obd_device       *obd = exp->exp_obd;
1144                 struct osp_device       *osp;
1145
1146                 if (!obd->obd_set_up || obd->obd_stopping)
1147                         RETURN(-EAGAIN);
1148
1149                 osp = lu2osp_dev(obd->obd_lu_dev);
1150                 LASSERT(osp);
1151                 /*
1152                  * 1.8/2.0 behaviour is that OST being connected once at least
1153                  * is considered "healthy". and one "healthy" OST is enough to
1154                  * allow lustre clients to connect to MDS
1155                  */
1156                 RETURN(!osp->opd_imp_seen_connected);
1157         }
1158
1159         RETURN(rc);
1160 }
1161
1162 int osp_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1163                   struct md_op_data *op_data)
1164 {
1165         struct client_obd *cli = &exp->exp_obd->u.cli;
1166         struct lu_client_seq *seq = cli->cl_seq;
1167
1168         ENTRY;
1169         RETURN(seq_client_alloc_fid(NULL, seq, fid));
1170 }
1171
1172 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1173 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1174 static void osp_key_exit(const struct lu_context *ctx,
1175                          struct lu_context_key *key, void *data)
1176 {
1177         struct osp_thread_info *info = data;
1178
1179         info->osi_attr.la_valid = 0;
1180 }
1181
1182 struct lu_context_key osp_thread_key = {
1183         .lct_tags = LCT_MD_THREAD,
1184         .lct_init = osp_key_init,
1185         .lct_fini = osp_key_fini,
1186         .lct_exit = osp_key_exit
1187 };
1188
1189 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1190 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1191
1192 struct lu_context_key osp_txn_key = {
1193         .lct_tags = LCT_OSP_THREAD | LCT_TX_HANDLE,
1194         .lct_init = osp_txn_key_init,
1195         .lct_fini = osp_txn_key_fini
1196 };
1197 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1198
1199 static struct lu_device_type_operations osp_device_type_ops = {
1200         .ldto_init           = osp_type_init,
1201         .ldto_fini           = osp_type_fini,
1202
1203         .ldto_start          = osp_type_start,
1204         .ldto_stop           = osp_type_stop,
1205
1206         .ldto_device_alloc   = osp_device_alloc,
1207         .ldto_device_free    = osp_device_free,
1208
1209         .ldto_device_fini    = osp_device_fini
1210 };
1211
1212 static struct lu_device_type osp_device_type = {
1213         .ldt_tags     = LU_DEVICE_DT,
1214         .ldt_name     = LUSTRE_OSP_NAME,
1215         .ldt_ops      = &osp_device_type_ops,
1216         .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
1217 };
1218
1219 static struct obd_ops osp_obd_device_ops = {
1220         .o_owner        = THIS_MODULE,
1221         .o_add_conn     = client_import_add_conn,
1222         .o_del_conn     = client_import_del_conn,
1223         .o_reconnect    = osp_reconnect,
1224         .o_connect      = osp_obd_connect,
1225         .o_disconnect   = osp_obd_disconnect,
1226         .o_get_info     = osp_obd_get_info,
1227         .o_import_event = osp_import_event,
1228         .o_iocontrol    = osp_iocontrol,
1229         .o_statfs       = osp_obd_statfs,
1230         .o_fid_init     = client_fid_init,
1231         .o_fid_fini     = client_fid_fini,
1232         .o_fid_alloc    = osp_fid_alloc,
1233 };
1234
1235 struct llog_operations osp_mds_ost_orig_logops;
1236
1237 static int __init osp_mod_init(void)
1238 {
1239         struct lprocfs_static_vars       lvars;
1240         cfs_proc_dir_entry_t            *osc_proc_dir;
1241         int                              rc;
1242
1243         rc = lu_kmem_init(osp_caches);
1244         if (rc)
1245                 return rc;
1246
1247         lprocfs_osp_init_vars(&lvars);
1248
1249         rc = class_register_type(&osp_obd_device_ops, NULL, NULL,
1250 #ifndef HAVE_ONLY_PROCFS_SEQ
1251                                 lvars.module_vars,
1252 #endif
1253                                 LUSTRE_OSP_NAME, &osp_device_type);
1254
1255         /* create "osc" entry in procfs for compatibility purposes */
1256         if (rc != 0) {
1257                 lu_kmem_fini(osp_caches);
1258                 return rc;
1259         }
1260
1261         lprocfs_lwp_init_vars(&lvars);
1262
1263         rc = class_register_type(&lwp_obd_device_ops, NULL, NULL,
1264 #ifndef HAVE_ONLY_PROCFS_SEQ
1265                                 lvars.module_vars,
1266 #endif
1267                                 LUSTRE_LWP_NAME, &lwp_device_type);
1268         if (rc != 0) {
1269                 class_unregister_type(LUSTRE_OSP_NAME);
1270                 lu_kmem_fini(osp_caches);
1271                 return rc;
1272         }
1273
1274         /* Note: add_rec/delcare_add_rec will be only used by catalogs */
1275         osp_mds_ost_orig_logops = llog_osd_ops;
1276         osp_mds_ost_orig_logops.lop_add = llog_cat_add_rec;
1277         osp_mds_ost_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1278
1279         osc_proc_dir = lprocfs_srch(proc_lustre_root, "osc");
1280         if (osc_proc_dir == NULL) {
1281                 osc_proc_dir = lprocfs_register("osc", proc_lustre_root, NULL,
1282                                                 NULL);
1283                 if (IS_ERR(osc_proc_dir))
1284                         CERROR("osp: can't create compat entry \"osc\": %d\n",
1285                                (int) PTR_ERR(osc_proc_dir));
1286         }
1287         return rc;
1288 }
1289
1290 static void __exit osp_mod_exit(void)
1291 {
1292         lprocfs_try_remove_proc_entry("osc", proc_lustre_root);
1293
1294         class_unregister_type(LUSTRE_LWP_NAME);
1295         class_unregister_type(LUSTRE_OSP_NAME);
1296         lu_kmem_fini(osp_caches);
1297 }
1298
1299 MODULE_AUTHOR("Intel, Inc. <http://www.intel.com/>");
1300 MODULE_DESCRIPTION("Lustre OST Proxy Device ("LUSTRE_OSP_NAME")");
1301 MODULE_LICENSE("GPL");
1302
1303 cfs_module(osp, LUSTRE_VERSION_STRING, osp_mod_init, osp_mod_exit);