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_ioctl.h>
  49 #include <lustre_param.h>
  50 #include <lustre_log.h>
  51 #include <lustre_mdc.h>
  52
  53 #include "osp_internal.h"
  54
  55 /* Slab for OSP object allocation */
  56 struct kmem_cache *osp_object_kmem;
  57
  58 static struct lu_kmem_descr osp_caches[] = {
  59         {
  60                 .ckd_cache = &osp_object_kmem,
  61                 .ckd_name  = "osp_obj",
  62                 .ckd_size  = sizeof(struct osp_object)
  63         },
  64         {
  65                 .ckd_cache = NULL
  66         }
  67 };
  68
  69 struct lu_object *osp_object_alloc(const struct lu_env *env,
  70                                    const struct lu_object_header *hdr,
  71                                    struct lu_device *d)
  72 {
  73         struct lu_object_header *h = NULL;
  74         struct osp_object       *o;
  75         struct lu_object        *l;
  76
  77         OBD_SLAB_ALLOC_PTR_GFP(o, osp_object_kmem, GFP_NOFS);
  78         if (o != NULL) {
  79                 l = &o->opo_obj.do_lu;
  80
  81                 /* If hdr is NULL, it means the object is not built
  82                  * from the top dev(MDT/OST), usually it happens when
  83                  * building striped object, like data object on MDT or
  84                  * striped object for directory */
  85                 if (hdr == NULL) {
  86                         h = &o->opo_header;
  87                         lu_object_header_init(h);
  88                         dt_object_init(&o->opo_obj, h, d);
  89                         lu_object_add_top(h, l);
  90                 } else {
  91                         dt_object_init(&o->opo_obj, h, d);
  92                 }
  93
  94                 l->lo_ops = &osp_lu_obj_ops;
  95
  96                 return l;
  97         } else {
  98                 return NULL;
  99         }
 100 }
 101
 102 static struct dt_object
 103 *osp_find_or_create(const struct lu_env *env, struct osp_device *osp,
 104                     struct lu_attr *attr, __u32 reg_id)
 105 {
 106         struct osp_thread_info *osi = osp_env_info(env);
 107         struct dt_object_format dof = { 0 };
 108         struct dt_object       *dto;
 109         int                  rc;
 110         ENTRY;
 111
 112         lu_local_obj_fid(&osi->osi_fid, reg_id);
 113         attr->la_valid = LA_MODE;
 114         attr->la_mode = S_IFREG | 0644;
 115         dof.dof_type = DFT_REGULAR;
 116         dto = dt_find_or_create(env, osp->opd_storage, &osi->osi_fid,
 117                                 &dof, attr);
 118         if (IS_ERR(dto))
 119                 RETURN(dto);
 120
 121         rc = dt_attr_get(env, dto, attr, NULL);
 122         if (rc) {
 123                 CERROR("%s: can't be initialized: rc = %d\n",
 124                        osp->opd_obd->obd_name, rc);
 125                 lu_object_put(env, &dto->do_lu);
 126                 RETURN(ERR_PTR(rc));
 127         }
 128         RETURN(dto);
 129 }
 130
 131 static int osp_write_local_file(const struct lu_env *env,
 132                                 struct osp_device *osp,
 133                                 struct dt_object *dt_obj,
 134                                 struct lu_buf *buf,
 135                                 loff_t offset)
 136 {
 137         struct thandle *th;
 138         int rc;
 139
 140         th = dt_trans_create(env, osp->opd_storage);
 141         if (IS_ERR(th))
 142                 RETURN(PTR_ERR(th));
 143
 144         rc = dt_declare_record_write(env, dt_obj, buf, offset, th);
 145         if (rc)
 146                 GOTO(out, rc);
 147         rc = dt_trans_start_local(env, osp->opd_storage, th);
 148         if (rc)
 149                 GOTO(out, rc);
 150
 151         rc = dt_record_write(env, dt_obj, buf, &offset, th);
 152 out:
 153         dt_trans_stop(env, osp->opd_storage, th);
 154         RETURN(rc);
 155 }
 156
 157 static int osp_init_last_objid(const struct lu_env *env, struct osp_device *osp)
 158 {
 159         struct osp_thread_info  *osi = osp_env_info(env);
 160         struct lu_fid           *fid = &osp->opd_last_used_fid;
 161         struct dt_object        *dto;
 162         int                     rc;
 163         ENTRY;
 164
 165         dto = osp_find_or_create(env, osp, &osi->osi_attr, MDD_LOV_OBJ_OID);
 166         if (IS_ERR(dto))
 167                 RETURN(PTR_ERR(dto));
 168         /* object will be released in device cleanup path */
 169         if (osi->osi_attr.la_size >=
 170             sizeof(osi->osi_id) * (osp->opd_index + 1)) {
 171                 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
 172                                    osp->opd_index);
 173                 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
 174                 if (rc != 0)
 175                         GOTO(out, rc);
 176         } else {
 177                 fid->f_oid = 0;
 178                 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
 179                                    osp->opd_index);
 180                 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
 181                                           osi->osi_off);
 182         }
 183         osp->opd_last_used_oid_file = dto;
 184         RETURN(0);
 185 out:
 186         /* object will be released in device cleanup path */
 187         CERROR("%s: can't initialize lov_objid: rc = %d\n",
 188                osp->opd_obd->obd_name, rc);
 189         lu_object_put(env, &dto->do_lu);
 190         osp->opd_last_used_oid_file = NULL;
 191         RETURN(rc);
 192 }
 193
 194 static int osp_init_last_seq(const struct lu_env *env, struct osp_device *osp)
 195 {
 196         struct osp_thread_info  *osi = osp_env_info(env);
 197         struct lu_fid           *fid = &osp->opd_last_used_fid;
 198         struct dt_object        *dto;
 199         int                     rc;
 200         ENTRY;
 201
 202         dto = osp_find_or_create(env, osp, &osi->osi_attr, MDD_LOV_OBJ_OSEQ);
 203         if (IS_ERR(dto))
 204                 RETURN(PTR_ERR(dto));
 205
 206         /* object will be released in device cleanup path */
 207         if (osi->osi_attr.la_size >=
 208             sizeof(osi->osi_id) * (osp->opd_index + 1)) {
 209                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
 210                                    osp->opd_index);
 211                 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
 212                 if (rc != 0)
 213                         GOTO(out, rc);
 214         } else {
 215                 fid->f_seq = 0;
 216                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
 217                                     osp->opd_index);
 218                 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
 219                                           osi->osi_off);
 220         }
 221         osp->opd_last_used_seq_file = dto;
 222         RETURN(0);
 223 out:
 224         /* object will be released in device cleanup path */
 225         CERROR("%s: can't initialize lov_seq: rc = %d\n",
 226                osp->opd_obd->obd_name, rc);
 227         lu_object_put(env, &dto->do_lu);
 228         osp->opd_last_used_seq_file = NULL;
 229         RETURN(rc);
 230 }
 231
 232 static int osp_last_used_init(const struct lu_env *env, struct osp_device *osp)
 233 {
 234         struct osp_thread_info *osi = osp_env_info(env);
 235         int                  rc;
 236         ENTRY;
 237
 238         fid_zero(&osp->opd_last_used_fid);
 239         rc = osp_init_last_objid(env, osp);
 240         if (rc < 0) {
 241                 CERROR("%s: Can not get ids %d from old objid!\n",
 242                        osp->opd_obd->obd_name, rc);
 243                 RETURN(rc);
 244         }
 245
 246         rc = osp_init_last_seq(env, osp);
 247         if (rc < 0) {
 248                 CERROR("%s: Can not get ids %d from old objid!\n",
 249                        osp->opd_obd->obd_name, rc);
 250                 GOTO(out, rc);
 251         }
 252
 253         if (fid_oid(&osp->opd_last_used_fid) != 0 &&
 254             fid_seq(&osp->opd_last_used_fid) == 0) {
 255                 /* Just upgrade from the old version,
 256                  * set the seq to be IDIF */
 257                 osp->opd_last_used_fid.f_seq =
 258                    fid_idif_seq(fid_oid(&osp->opd_last_used_fid),
 259                                 osp->opd_index);
 260                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off,
 261                                     &osp->opd_last_used_fid.f_seq,
 262                                     osp->opd_index);
 263                 rc = osp_write_local_file(env, osp, osp->opd_last_used_seq_file,
 264                                           &osi->osi_lb, osi->osi_off);
 265                 if (rc) {
 266                         CERROR("%s : Can not write seq file: rc = %d\n",
 267                                osp->opd_obd->obd_name, rc);
 268                         GOTO(out, rc);
 269                 }
 270         }
 271
 272         if (!fid_is_zero(&osp->opd_last_used_fid) &&
 273                  !fid_is_sane(&osp->opd_last_used_fid)) {
 274                 CERROR("%s: Got invalid FID "DFID"\n", osp->opd_obd->obd_name,
 275                         PFID(&osp->opd_last_used_fid));
 276                 GOTO(out, rc = -EINVAL);
 277         }
 278
 279         CDEBUG(D_INFO, "%s: Init last used fid "DFID"\n",
 280                osp->opd_obd->obd_name, PFID(&osp->opd_last_used_fid));
 281 out:
 282         if (rc != 0) {
 283                 if (osp->opd_last_used_oid_file != NULL) {
 284                         lu_object_put(env, &osp->opd_last_used_oid_file->do_lu);
 285                         osp->opd_last_used_oid_file = NULL;
 286                 }
 287                 if (osp->opd_last_used_seq_file != NULL) {
 288                         lu_object_put(env, &osp->opd_last_used_seq_file->do_lu);
 289                         osp->opd_last_used_seq_file = NULL;
 290                 }
 291         }
 292
 293         RETURN(rc);
 294 }
 295
 296 static void osp_last_used_fini(const struct lu_env *env, struct osp_device *d)
 297 {
 298         /* release last_used file */
 299         if (d->opd_last_used_oid_file != NULL) {
 300                 lu_object_put(env, &d->opd_last_used_oid_file->do_lu);
 301                 d->opd_last_used_oid_file = NULL;
 302         }
 303
 304         if (d->opd_last_used_seq_file != NULL) {
 305                 lu_object_put(env, &d->opd_last_used_seq_file->do_lu);
 306                 d->opd_last_used_seq_file = NULL;
 307         }
 308 }
 309
 310 static int osp_disconnect(struct osp_device *d)
 311 {
 312         struct obd_import *imp;
 313         int rc = 0;
 314
 315         imp = d->opd_obd->u.cli.cl_import;
 316
 317         /* Mark import deactivated now, so we don't try to reconnect if any
 318          * of the cleanup RPCs fails (e.g. ldlm cancel, etc).  We don't
 319          * fully deactivate the import, or that would drop all requests. */
 320         LASSERT(imp != NULL);
 321         spin_lock(&imp->imp_lock);
 322         imp->imp_deactive = 1;
 323         spin_unlock(&imp->imp_lock);
 324
 325         ptlrpc_deactivate_import(imp);
 326
 327         /* Some non-replayable imports (MDS's OSCs) are pinged, so just
 328          * delete it regardless.  (It's safe to delete an import that was
 329          * never added.) */
 330         (void)ptlrpc_pinger_del_import(imp);
 331
 332         rc = ptlrpc_disconnect_import(imp, 0);
 333         if (rc != 0)
 334                 CERROR("%s: can't disconnect: rc = %d\n",
 335                        d->opd_obd->obd_name, rc);
 336
 337         ptlrpc_invalidate_import(imp);
 338
 339         RETURN(rc);
 340 }
 341
 342 static int osp_shutdown(const struct lu_env *env, struct osp_device *d)
 343 {
 344         int                      rc = 0;
 345         ENTRY;
 346
 347         LASSERT(env);
 348
 349         rc = osp_disconnect(d);
 350
 351         osp_sync_fini(d);
 352
 353         if (!d->opd_connect_mdt) {
 354                 /* stop precreate thread */
 355                 osp_precreate_fini(d);
 356
 357                 /* release last_used file */
 358                 osp_last_used_fini(env, d);
 359         }
 360
 361         obd_fid_fini(d->opd_obd);
 362
 363         RETURN(rc);
 364 }
 365
 366 static int osp_process_config(const struct lu_env *env,
 367                               struct lu_device *dev, struct lustre_cfg *lcfg)
 368 {
 369         struct osp_device               *d = lu2osp_dev(dev);
 370         struct lprocfs_static_vars       lvars = { 0 };
 371         int                              rc;
 372
 373         ENTRY;
 374
 375         switch (lcfg->lcfg_command) {
 376         case LCFG_PRE_CLEANUP:
 377                 rc = osp_disconnect(d);
 378                 break;
 379         case LCFG_CLEANUP:
 380                 lu_dev_del_linkage(dev->ld_site, dev);
 381                 rc = osp_shutdown(env, d);
 382                 break;
 383         case LCFG_PARAM:
 384                 lprocfs_osp_init_vars(&lvars);
 385
 386                 LASSERT(d->opd_obd);
 387                 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
 388                                               lcfg, d->opd_obd);
 389                 if (rc > 0)
 390                         rc = 0;
 391                 if (rc == -ENOSYS) {
 392                         /* class_process_proc_param() haven't found matching
 393                          * parameter and returned ENOSYS so that layer(s)
 394                          * below could use that. But OSP is the bottom, so
 395                          * just ignore it */
 396                         CERROR("%s: unknown param %s\n",
 397                                (char *)lustre_cfg_string(lcfg, 0),
 398                                (char *)lustre_cfg_string(lcfg, 1));
 399                         rc = 0;
 400                 }
 401                 break;
 402         default:
 403                 CERROR("%s: unknown command %u\n",
 404                        (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
 405                 rc = 0;
 406                 break;
 407         }
 408
 409         RETURN(rc);
 410 }
 411
 412 static int osp_recovery_complete(const struct lu_env *env,
 413                                  struct lu_device *dev)
 414 {
 415         struct osp_device       *osp = lu2osp_dev(dev);
 416         int                      rc = 0;
 417
 418         ENTRY;
 419         osp->opd_recovery_completed = 1;
 420
 421         if (!osp->opd_connect_mdt && osp->opd_pre != NULL)
 422                 wake_up(&osp->opd_pre_waitq);
 423         RETURN(rc);
 424 }
 425
 426 const struct lu_device_operations osp_lu_ops = {
 427         .ldo_object_alloc       = osp_object_alloc,
 428         .ldo_process_config     = osp_process_config,
 429         .ldo_recovery_complete  = osp_recovery_complete,
 430 };
 431
 432 /**
 433  * provides with statfs from corresponded OST
 434  *
 435  */
 436 static int osp_statfs(const struct lu_env *env, struct dt_device *dev,
 437                       struct obd_statfs *sfs)
 438 {
 439         struct osp_device *d = dt2osp_dev(dev);
 440
 441         ENTRY;
 442
 443         if (unlikely(d->opd_imp_active == 0))
 444                 RETURN(-ENOTCONN);
 445
 446         if (d->opd_pre == NULL)
 447                 RETURN(0);
 448
 449         /* return recently updated data */
 450         *sfs = d->opd_statfs;
 451
 452         /*
 453          * layer above osp (usually lod) can use ffree to estimate
 454          * how many objects are available for immediate creation
 455          */
 456         spin_lock(&d->opd_pre_lock);
 457         LASSERTF(fid_seq(&d->opd_pre_last_created_fid) ==
 458                  fid_seq(&d->opd_pre_used_fid),
 459                  "last_created "DFID", next_fid "DFID"\n",
 460                  PFID(&d->opd_pre_last_created_fid),
 461                  PFID(&d->opd_pre_used_fid));
 462         sfs->os_fprecreated = fid_oid(&d->opd_pre_last_created_fid) -
 463                               fid_oid(&d->opd_pre_used_fid);
 464         sfs->os_fprecreated -= d->opd_pre_reserved;
 465         spin_unlock(&d->opd_pre_lock);
 466
 467         LASSERT(sfs->os_fprecreated <= OST_MAX_PRECREATE * 2);
 468
 469         CDEBUG(D_OTHER, "%s: "LPU64" blocks, "LPU64" free, "LPU64" avail, "
 470                LPU64" files, "LPU64" free files\n", d->opd_obd->obd_name,
 471                sfs->os_blocks, sfs->os_bfree, sfs->os_bavail,
 472                sfs->os_files, sfs->os_ffree);
 473         RETURN(0);
 474 }
 475
 476 static int osp_sync(const struct lu_env *env, struct dt_device *dev)
 477 {
 478         ENTRY;
 479
 480         /*
 481          * XXX: wake up sync thread, command it to start flushing asap?
 482          */
 483
 484         RETURN(0);
 485 }
 486
 487 const struct dt_device_operations osp_dt_ops = {
 488         .dt_statfs       = osp_statfs,
 489         .dt_sync         = osp_sync,
 490         .dt_trans_create = osp_trans_create,
 491         .dt_trans_start  = osp_trans_start,
 492         .dt_trans_stop   = osp_trans_stop,
 493 };
 494
 495 static int osp_connect_to_osd(const struct lu_env *env, struct osp_device *m,
 496                               const char *nextdev)
 497 {
 498         struct obd_connect_data *data = NULL;
 499         struct obd_device       *obd;
 500         int                      rc;
 501
 502         ENTRY;
 503
 504         LASSERT(m->opd_storage_exp == NULL);
 505
 506         OBD_ALLOC_PTR(data);
 507         if (data == NULL)
 508                 RETURN(-ENOMEM);
 509
 510         obd = class_name2obd(nextdev);
 511         if (obd == NULL) {
 512                 CERROR("%s: can't locate next device: %s\n",
 513                        m->opd_obd->obd_name, nextdev);
 514                 GOTO(out, rc = -ENOTCONN);
 515         }
 516
 517         rc = obd_connect(env, &m->opd_storage_exp, obd, &obd->obd_uuid, data,
 518                          NULL);
 519         if (rc) {
 520                 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
 521                        m->opd_obd->obd_name, nextdev, rc);
 522                 GOTO(out, rc);
 523         }
 524
 525         m->opd_dt_dev.dd_lu_dev.ld_site =
 526                 m->opd_storage_exp->exp_obd->obd_lu_dev->ld_site;
 527         LASSERT(m->opd_dt_dev.dd_lu_dev.ld_site);
 528         m->opd_storage = lu2dt_dev(m->opd_storage_exp->exp_obd->obd_lu_dev);
 529
 530 out:
 531         OBD_FREE_PTR(data);
 532         RETURN(rc);
 533 }
 534
 535 static int osp_init0(const struct lu_env *env, struct osp_device *m,
 536                      struct lu_device_type *ldt, struct lustre_cfg *cfg)
 537 {
 538         struct obd_device       *obd;
 539         struct obd_import       *imp;
 540         class_uuid_t            uuid;
 541         char                    *src, *tgt, *mdt, *osdname = NULL;
 542         int                     rc;
 543         long                    idx;
 544
 545         ENTRY;
 546
 547         mutex_init(&m->opd_async_requests_mutex);
 548
 549         obd = class_name2obd(lustre_cfg_string(cfg, 0));
 550         if (obd == NULL) {
 551                 CERROR("Cannot find obd with name %s\n",
 552                        lustre_cfg_string(cfg, 0));
 553                 RETURN(-ENODEV);
 554         }
 555         m->opd_obd = obd;
 556
 557         /* There is no record in the MDT configuration for the local disk
 558          * device, so we have to extract this from elsewhere in the profile.
 559          * The only information we get at setup is from the OSC records:
 560          * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
 561          * Note that 1.8 generated configs are missing the -MDTxxxx part.
 562          * We need to reconstruct the name of the underlying OSD from this:
 563          * {fsname}-{svname}-osd, for example "lustre-MDT0000-osd".  We
 564          * also need to determine the OST index from this - will be used
 565          * to calculate the offset in shared lov_objids file later */
 566
 567         src = lustre_cfg_string(cfg, 0);
 568         if (src == NULL)
 569                 RETURN(-EINVAL);
 570
 571         tgt = strrchr(src, '-');
 572         if (tgt == NULL) {
 573                 CERROR("%s: invalid target name %s\n",
 574                        m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 575                 RETURN(-EINVAL);
 576         }
 577
 578         if (strncmp(tgt, "-osc", 4) == 0) {
 579                 /* Old OSC name fsname-OSTXXXX-osc */
 580                 for (tgt--; tgt > src && *tgt != '-'; tgt--)
 581                         ;
 582                 if (tgt == src) {
 583                         CERROR("%s: invalid target name %s\n",
 584                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 585                         RETURN(-EINVAL);
 586                 }
 587
 588                 if (strncmp(tgt, "-OST", 4) != 0) {
 589                         CERROR("%s: invalid target name %s\n",
 590                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 591                         RETURN(-EINVAL);
 592                 }
 593
 594                 idx = simple_strtol(tgt + 4, &mdt, 16);
 595                 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
 596                         CERROR("%s: invalid OST index in '%s'\n",
 597                                m->opd_obd->obd_name, src);
 598                         RETURN(-EINVAL);
 599                 }
 600                 m->opd_index = idx;
 601                 m->opd_group = 0;
 602                 idx = tgt - src;
 603         } else {
 604                 /* New OSC name fsname-OSTXXXX-osc-MDTXXXX */
 605                 if (strncmp(tgt, "-MDT", 4) != 0 &&
 606                     strncmp(tgt, "-OST", 4) != 0) {
 607                         CERROR("%s: invalid target name %s\n",
 608                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 609                         RETURN(-EINVAL);
 610                 }
 611
 612                 idx = simple_strtol(tgt + 4, &mdt, 16);
 613                 if (*mdt != '\0' || idx > INT_MAX || idx < 0) {
 614                         CERROR("%s: invalid OST index in '%s'\n",
 615                                m->opd_obd->obd_name, src);
 616                         RETURN(-EINVAL);
 617                 }
 618
 619                 /* Get MDT index from the name and set it to opd_group,
 620                  * which will be used by OSP to connect with OST */
 621                 m->opd_group = idx;
 622                 if (tgt - src <= 12) {
 623                         CERROR("%s: invalid mdt index retrieve from %s\n",
 624                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 625                         RETURN(-EINVAL);
 626                 }
 627
 628                 if (strncmp(tgt - 12, "-MDT", 4) == 0)
 629                         m->opd_connect_mdt = 1;
 630
 631                 idx = simple_strtol(tgt - 8, &mdt, 16);
 632                 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
 633                         CERROR("%s: invalid OST index in '%s'\n",
 634                                m->opd_obd->obd_name, src);
 635                         RETURN(-EINVAL);
 636                 }
 637
 638                 m->opd_index = idx;
 639                 idx = tgt - src - 12;
 640         }
 641         /* check the fsname length, and after this everything else will fit */
 642         if (idx > MTI_NAME_MAXLEN) {
 643                 CERROR("%s: fsname too long in '%s'\n",
 644                        m->opd_obd->obd_name, src);
 645                 RETURN(-EINVAL);
 646         }
 647
 648         OBD_ALLOC(osdname, MAX_OBD_NAME);
 649         if (osdname == NULL)
 650                 RETURN(-ENOMEM);
 651
 652         memcpy(osdname, src, idx); /* copy just the fsname part */
 653         osdname[idx] = '\0';
 654
 655         mdt = strstr(mdt, "-MDT");
 656         if (mdt == NULL) /* 1.8 configs don't have "-MDT0000" at the end */
 657                 strcat(osdname, "-MDT0000");
 658         else
 659                 strcat(osdname, mdt);
 660         strcat(osdname, "-osd");
 661         CDEBUG(D_HA, "%s: connect to %s (%s)\n", obd->obd_name, osdname, src);
 662
 663         if (m->opd_connect_mdt) {
 664                 struct client_obd *cli = &m->opd_obd->u.cli;
 665
 666                 OBD_ALLOC(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
 667                 if (!cli->cl_rpc_lock)
 668                         GOTO(out_fini, rc = -ENOMEM);
 669                 osp_init_rpc_lock(cli->cl_rpc_lock);
 670         }
 671
 672         m->opd_dt_dev.dd_lu_dev.ld_ops = &osp_lu_ops;
 673         m->opd_dt_dev.dd_ops = &osp_dt_ops;
 674         obd->obd_lu_dev = &m->opd_dt_dev.dd_lu_dev;
 675
 676         rc = osp_connect_to_osd(env, m, osdname);
 677         if (rc)
 678                 GOTO(out_fini, rc);
 679
 680         rc = ptlrpcd_addref();
 681         if (rc)
 682                 GOTO(out_disconnect, rc);
 683
 684         rc = client_obd_setup(obd, cfg);
 685         if (rc) {
 686                 CERROR("%s: can't setup obd: %d\n", m->opd_obd->obd_name, rc);
 687                 GOTO(out_ref, rc);
 688         }
 689
 690         osp_lprocfs_init(m);
 691
 692         rc = obd_fid_init(m->opd_obd, NULL, m->opd_connect_mdt ?
 693                           LUSTRE_SEQ_METADATA : LUSTRE_SEQ_DATA);
 694         if (rc) {
 695                 CERROR("%s: fid init error: rc = %d\n",
 696                        m->opd_obd->obd_name, rc);
 697                 GOTO(out_proc, rc);
 698         }
 699
 700         if (!m->opd_connect_mdt) {
 701                 /* Initialize last id from the storage - will be
 702                  * used in orphan cleanup. */
 703                 rc = osp_last_used_init(env, m);
 704                 if (rc)
 705                         GOTO(out_proc, rc);
 706
 707
 708                 /* Initialize precreation thread, it handles new
 709                  * connections as well. */
 710                 rc = osp_init_precreate(m);
 711                 if (rc)
 712                         GOTO(out_last_used, rc);
 713         }
 714
 715         /*
 716          * Initialize synhronization mechanism taking
 717          * care of propogating changes to OST in near
 718          * transactional manner.
 719          */
 720         rc = osp_sync_init(env, m);
 721         if (rc)
 722                 GOTO(out_precreat, rc);
 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         /* stop sync thread */
 741         osp_sync_fini(m);
 742 out_precreat:
 743         /* stop precreate thread */
 744         if (!m->opd_connect_mdt)
 745                 osp_precreate_fini(m);
 746 out_last_used:
 747         if (!m->opd_connect_mdt)
 748                 osp_last_used_fini(env, m);
 749 out_proc:
 750         ptlrpc_lprocfs_unregister_obd(obd);
 751         lprocfs_obd_cleanup(obd);
 752         if (m->opd_symlink)
 753                 lprocfs_remove(&m->opd_symlink);
 754         client_obd_cleanup(obd);
 755 out_ref:
 756         ptlrpcd_decref();
 757 out_disconnect:
 758         if (m->opd_connect_mdt) {
 759                 struct client_obd *cli = &m->opd_obd->u.cli;
 760                 if (cli->cl_rpc_lock != NULL) {
 761                         OBD_FREE_PTR(cli->cl_rpc_lock);
 762                         cli->cl_rpc_lock = NULL;
 763                 }
 764         }
 765         obd_disconnect(m->opd_storage_exp);
 766 out_fini:
 767         if (osdname)
 768                 OBD_FREE(osdname, MAX_OBD_NAME);
 769         RETURN(rc);
 770 }
 771
 772 static struct lu_device *osp_device_free(const struct lu_env *env,
 773                                          struct lu_device *lu)
 774 {
 775         struct osp_device *m = lu2osp_dev(lu);
 776
 777         ENTRY;
 778
 779         if (atomic_read(&lu->ld_ref) && lu->ld_site) {
 780                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
 781                 lu_site_print(env, lu->ld_site, &msgdata, lu_cdebug_printer);
 782         }
 783         dt_device_fini(&m->opd_dt_dev);
 784         OBD_FREE_PTR(m);
 785         RETURN(NULL);
 786 }
 787
 788 static struct lu_device *osp_device_alloc(const struct lu_env *env,
 789                                           struct lu_device_type *t,
 790                                           struct lustre_cfg *lcfg)
 791 {
 792         struct osp_device *m;
 793         struct lu_device  *l;
 794
 795         OBD_ALLOC_PTR(m);
 796         if (m == NULL) {
 797                 l = ERR_PTR(-ENOMEM);
 798         } else {
 799                 int rc;
 800
 801                 l = osp2lu_dev(m);
 802                 dt_device_init(&m->opd_dt_dev, t);
 803                 rc = osp_init0(env, m, t, lcfg);
 804                 if (rc != 0) {
 805                         osp_device_free(env, l);
 806                         l = ERR_PTR(rc);
 807                 }
 808         }
 809         return l;
 810 }
 811
 812 static struct lu_device *osp_device_fini(const struct lu_env *env,
 813                                          struct lu_device *d)
 814 {
 815         struct osp_device *m = lu2osp_dev(d);
 816         struct obd_import *imp;
 817         int                rc;
 818
 819         ENTRY;
 820
 821         if (m->opd_async_requests != NULL) {
 822                 out_destroy_update_req(m->opd_async_requests);
 823                 m->opd_async_requests = NULL;
 824         }
 825
 826         if (m->opd_storage_exp)
 827                 obd_disconnect(m->opd_storage_exp);
 828
 829         imp = m->opd_obd->u.cli.cl_import;
 830
 831         if (imp->imp_rq_pool) {
 832                 ptlrpc_free_rq_pool(imp->imp_rq_pool);
 833                 imp->imp_rq_pool = NULL;
 834         }
 835
 836         if (m->opd_symlink)
 837                 lprocfs_remove(&m->opd_symlink);
 838
 839         LASSERT(m->opd_obd);
 840         ptlrpc_lprocfs_unregister_obd(m->opd_obd);
 841         lprocfs_obd_cleanup(m->opd_obd);
 842
 843         if (m->opd_connect_mdt) {
 844                 struct client_obd *cli = &m->opd_obd->u.cli;
 845                 if (cli->cl_rpc_lock != NULL) {
 846                         OBD_FREE_PTR(cli->cl_rpc_lock);
 847                         cli->cl_rpc_lock = NULL;
 848                 }
 849         }
 850
 851         rc = client_obd_cleanup(m->opd_obd);
 852         LASSERTF(rc == 0, "error %d\n", rc);
 853
 854         ptlrpcd_decref();
 855
 856         RETURN(NULL);
 857 }
 858
 859 static int osp_reconnect(const struct lu_env *env,
 860                          struct obd_export *exp, struct obd_device *obd,
 861                          struct obd_uuid *cluuid,
 862                          struct obd_connect_data *data,
 863                          void *localdata)
 864 {
 865         return 0;
 866 }
 867
 868 static int osp_prepare_fid_client(struct osp_device *osp)
 869 {
 870         LASSERT(osp->opd_obd->u.cli.cl_seq != NULL);
 871         if (osp->opd_obd->u.cli.cl_seq->lcs_exp != NULL)
 872                 return 0;
 873
 874         LASSERT(osp->opd_exp != NULL);
 875         osp->opd_obd->u.cli.cl_seq->lcs_exp =
 876                                 class_export_get(osp->opd_exp);
 877         return 0;
 878 }
 879
 880 /*
 881  * we use exports to track all LOD users
 882  */
 883 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
 884                            struct obd_device *obd, struct obd_uuid *cluuid,
 885                            struct obd_connect_data *data, void *localdata)
 886 {
 887         struct osp_device       *osp = lu2osp_dev(obd->obd_lu_dev);
 888         struct obd_connect_data *ocd;
 889         struct obd_import       *imp;
 890         struct lustre_handle     conn;
 891         int                      rc;
 892
 893         ENTRY;
 894
 895         CDEBUG(D_CONFIG, "connect #%d\n", osp->opd_connects);
 896
 897         rc = class_connect(&conn, obd, cluuid);
 898         if (rc)
 899                 RETURN(rc);
 900
 901         *exp = class_conn2export(&conn);
 902         /* Why should there ever be more than 1 connect? */
 903         osp->opd_connects++;
 904         LASSERT(osp->opd_connects == 1);
 905
 906         osp->opd_exp = *exp;
 907
 908         imp = osp->opd_obd->u.cli.cl_import;
 909         imp->imp_dlm_handle = conn;
 910
 911         LASSERT(data != NULL);
 912         LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
 913         ocd = &imp->imp_connect_data;
 914         *ocd = *data;
 915
 916         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 917
 918         ocd->ocd_version = LUSTRE_VERSION_CODE;
 919         ocd->ocd_index = data->ocd_index;
 920         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 921
 922         rc = ptlrpc_connect_import(imp);
 923         if (rc) {
 924                 CERROR("%s: can't connect obd: rc = %d\n", obd->obd_name, rc);
 925                 GOTO(out, rc);
 926         }
 927
 928         ptlrpc_pinger_add_import(imp);
 929 out:
 930         RETURN(rc);
 931 }
 932
 933 /*
 934  * once last export (we don't count self-export) disappeared
 935  * osp can be released
 936  */
 937 static int osp_obd_disconnect(struct obd_export *exp)
 938 {
 939         struct obd_device *obd = exp->exp_obd;
 940         struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
 941         int                rc;
 942         ENTRY;
 943
 944         /* Only disconnect the underlying layers on the final disconnect. */
 945         LASSERT(osp->opd_connects == 1);
 946         osp->opd_connects--;
 947
 948         rc = class_disconnect(exp);
 949         if (rc) {
 950                 CERROR("%s: class disconnect error: rc = %d\n",
 951                        obd->obd_name, rc);
 952                 RETURN(rc);
 953         }
 954
 955         /* destroy the device */
 956         class_manual_cleanup(obd);
 957
 958         RETURN(rc);
 959 }
 960
 961 /*
 962  * lprocfs helpers still use OBD API, let's keep obd_statfs() support
 963  */
 964 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
 965                           struct obd_statfs *osfs, __u64 max_age, __u32 flags)
 966 {
 967         struct obd_statfs       *msfs;
 968         struct ptlrpc_request   *req;
 969         struct obd_import       *imp = NULL;
 970         int                      rc;
 971
 972         ENTRY;
 973
 974         /* Since the request might also come from lprocfs, so we need
 975          * sync this with client_disconnect_export Bug15684 */
 976         down_read(&exp->exp_obd->u.cli.cl_sem);
 977         if (exp->exp_obd->u.cli.cl_import)
 978                 imp = class_import_get(exp->exp_obd->u.cli.cl_import);
 979         up_read(&exp->exp_obd->u.cli.cl_sem);
 980         if (!imp)
 981                 RETURN(-ENODEV);
 982
 983         /* We could possibly pass max_age in the request (as an absolute
 984          * timestamp or a "seconds.usec ago") so the target can avoid doing
 985          * extra calls into the filesystem if that isn't necessary (e.g.
 986          * during mount that would help a bit).  Having relative timestamps
 987          * is not so great if request processing is slow, while absolute
 988          * timestamps are not ideal because they need time synchronization. */
 989         req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 990
 991         class_import_put(imp);
 992
 993         if (req == NULL)
 994                 RETURN(-ENOMEM);
 995
 996         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
 997         if (rc) {
 998                 ptlrpc_request_free(req);
 999                 RETURN(rc);
1000         }
1001         ptlrpc_request_set_replen(req);
1002         req->rq_request_portal = OST_CREATE_PORTAL;
1003         ptlrpc_at_set_req_timeout(req);
1004
1005         if (flags & OBD_STATFS_NODELAY) {
1006                 /* procfs requests not want stat in wait for avoid deadlock */
1007                 req->rq_no_resend = 1;
1008                 req->rq_no_delay = 1;
1009         }
1010
1011         rc = ptlrpc_queue_wait(req);
1012         if (rc)
1013                 GOTO(out, rc);
1014
1015         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1016         if (msfs == NULL)
1017                 GOTO(out, rc = -EPROTO);
1018
1019         *osfs = *msfs;
1020
1021         EXIT;
1022 out:
1023         ptlrpc_req_finished(req);
1024         return rc;
1025 }
1026
1027 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1028                             enum obd_import_event event)
1029 {
1030         struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1031
1032         switch (event) {
1033         case IMP_EVENT_DISCON:
1034                 d->opd_got_disconnected = 1;
1035                 d->opd_imp_connected = 0;
1036                 if (d->opd_connect_mdt)
1037                         break;
1038
1039                 if (d->opd_pre != NULL) {
1040                         osp_pre_update_status(d, -ENODEV);
1041                         wake_up(&d->opd_pre_waitq);
1042                 }
1043
1044                 CDEBUG(D_HA, "got disconnected\n");
1045                 break;
1046         case IMP_EVENT_INACTIVE:
1047                 d->opd_imp_active = 0;
1048                 if (d->opd_connect_mdt)
1049                         break;
1050
1051                 if (d->opd_pre != NULL) {
1052                         osp_pre_update_status(d, -ENODEV);
1053                         wake_up(&d->opd_pre_waitq);
1054                 }
1055
1056                 CDEBUG(D_HA, "got inactive\n");
1057                 break;
1058         case IMP_EVENT_ACTIVE:
1059                 d->opd_imp_active = 1;
1060
1061                 if (osp_prepare_fid_client(d) != 0)
1062                         break;
1063
1064                 if (d->opd_got_disconnected)
1065                         d->opd_new_connection = 1;
1066                 d->opd_imp_connected = 1;
1067                 d->opd_imp_seen_connected = 1;
1068                 if (d->opd_connect_mdt)
1069                         break;
1070
1071                 if (d->opd_pre != NULL)
1072                         wake_up(&d->opd_pre_waitq);
1073
1074                 __osp_sync_check_for_work(d);
1075                 CDEBUG(D_HA, "got connected\n");
1076                 break;
1077         case IMP_EVENT_INVALIDATE:
1078                 if (obd->obd_namespace == NULL)
1079                         break;
1080                 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1081                 break;
1082         case IMP_EVENT_OCD:
1083         case IMP_EVENT_DEACTIVATE:
1084         case IMP_EVENT_ACTIVATE:
1085                 break;
1086         default:
1087                 CERROR("%s: unsupported import event: %#x\n",
1088                        obd->obd_name, event);
1089         }
1090         return 0;
1091 }
1092
1093 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1094                          void *karg, void *uarg)
1095 {
1096         struct obd_device       *obd = exp->exp_obd;
1097         struct osp_device       *d;
1098         struct obd_ioctl_data   *data = karg;
1099         int                      rc = 0;
1100
1101         ENTRY;
1102
1103         LASSERT(obd->obd_lu_dev);
1104         d = lu2osp_dev(obd->obd_lu_dev);
1105         LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1106
1107         if (!try_module_get(THIS_MODULE)) {
1108                 CERROR("%s: can't get module. Is it alive?", obd->obd_name);
1109                 return -EINVAL;
1110         }
1111
1112         switch (cmd) {
1113         case OBD_IOC_CLIENT_RECOVER:
1114                 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1115                                            data->ioc_inlbuf1, 0);
1116                 if (rc > 0)
1117                         rc = 0;
1118                 break;
1119         case IOC_OSC_SET_ACTIVE:
1120                 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1121                                               data->ioc_offset);
1122                 break;
1123         case OBD_IOC_PING_TARGET:
1124                 rc = ptlrpc_obd_ping(obd);
1125                 break;
1126         default:
1127                 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1128                        cmd, current_comm());
1129                 rc = -ENOTTY;
1130         }
1131         module_put(THIS_MODULE);
1132         return rc;
1133 }
1134
1135 static int osp_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1136                             __u32 keylen, void *key, __u32 *vallen, void *val,
1137                             struct lov_stripe_md *lsm)
1138 {
1139         int rc = -EINVAL;
1140
1141         if (KEY_IS(KEY_OSP_CONNECTED)) {
1142                 struct obd_device       *obd = exp->exp_obd;
1143                 struct osp_device       *osp;
1144
1145                 if (!obd->obd_set_up || obd->obd_stopping)
1146                         RETURN(-EAGAIN);
1147
1148                 osp = lu2osp_dev(obd->obd_lu_dev);
1149                 LASSERT(osp);
1150                 /*
1151                  * 1.8/2.0 behaviour is that OST being connected once at least
1152                  * is considered "healthy". and one "healthy" OST is enough to
1153                  * allow lustre clients to connect to MDS
1154                  */
1155                 RETURN(!osp->opd_imp_seen_connected);
1156         }
1157
1158         RETURN(rc);
1159 }
1160
1161 int osp_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1162                   struct lu_fid *fid, struct md_op_data *op_data)
1163 {
1164         struct client_obd       *cli = &exp->exp_obd->u.cli;
1165         struct osp_device       *osp = lu2osp_dev(exp->exp_obd->obd_lu_dev);
1166         struct lu_client_seq    *seq = cli->cl_seq;
1167         ENTRY;
1168
1169         LASSERT(osp->opd_obd->u.cli.cl_seq != NULL);
1170         /* Sigh, fid client is not ready yet */
1171         if (osp->opd_obd->u.cli.cl_seq->lcs_exp == NULL)
1172                 RETURN(-ENOTCONN);
1173
1174         RETURN(seq_client_alloc_fid(env, seq, fid));
1175 }
1176
1177 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1178 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1179 static void osp_key_exit(const struct lu_context *ctx,
1180                          struct lu_context_key *key, void *data)
1181 {
1182         struct osp_thread_info *info = data;
1183
1184         info->osi_attr.la_valid = 0;
1185 }
1186
1187 struct lu_context_key osp_thread_key = {
1188         .lct_tags = LCT_MD_THREAD,
1189         .lct_init = osp_key_init,
1190         .lct_fini = osp_key_fini,
1191         .lct_exit = osp_key_exit
1192 };
1193
1194 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1195 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1196
1197 struct lu_context_key osp_txn_key = {
1198         .lct_tags = LCT_OSP_THREAD | LCT_TX_HANDLE,
1199         .lct_init = osp_txn_key_init,
1200         .lct_fini = osp_txn_key_fini
1201 };
1202 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1203
1204 static struct lu_device_type_operations osp_device_type_ops = {
1205         .ldto_init           = osp_type_init,
1206         .ldto_fini           = osp_type_fini,
1207
1208         .ldto_start          = osp_type_start,
1209         .ldto_stop           = osp_type_stop,
1210
1211         .ldto_device_alloc   = osp_device_alloc,
1212         .ldto_device_free    = osp_device_free,
1213
1214         .ldto_device_fini    = osp_device_fini
1215 };
1216
1217 static struct lu_device_type osp_device_type = {
1218         .ldt_tags     = LU_DEVICE_DT,
1219         .ldt_name     = LUSTRE_OSP_NAME,
1220         .ldt_ops      = &osp_device_type_ops,
1221         .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
1222 };
1223
1224 static struct obd_ops osp_obd_device_ops = {
1225         .o_owner        = THIS_MODULE,
1226         .o_add_conn     = client_import_add_conn,
1227         .o_del_conn     = client_import_del_conn,
1228         .o_reconnect    = osp_reconnect,
1229         .o_connect      = osp_obd_connect,
1230         .o_disconnect   = osp_obd_disconnect,
1231         .o_get_info     = osp_obd_get_info,
1232         .o_import_event = osp_import_event,
1233         .o_iocontrol    = osp_iocontrol,
1234         .o_statfs       = osp_obd_statfs,
1235         .o_fid_init     = client_fid_init,
1236         .o_fid_fini     = client_fid_fini,
1237         .o_fid_alloc    = osp_fid_alloc,
1238 };
1239
1240 struct llog_operations osp_mds_ost_orig_logops;
1241
1242 static int __init osp_mod_init(void)
1243 {
1244         struct lprocfs_static_vars       lvars;
1245         struct obd_type *type;
1246         int                              rc;
1247
1248         rc = lu_kmem_init(osp_caches);
1249         if (rc)
1250                 return rc;
1251
1252         lprocfs_osp_init_vars(&lvars);
1253
1254         rc = class_register_type(&osp_obd_device_ops, NULL, true, NULL,
1255 #ifndef HAVE_ONLY_PROCFS_SEQ
1256                                  lvars.module_vars,
1257 #endif
1258                                  LUSTRE_OSP_NAME, &osp_device_type);
1259
1260         /* create "osc" entry in procfs for compatibility purposes */
1261         if (rc != 0) {
1262                 lu_kmem_fini(osp_caches);
1263                 return rc;
1264         }
1265
1266         lprocfs_lwp_init_vars(&lvars);
1267
1268         rc = class_register_type(&lwp_obd_device_ops, NULL, true, NULL,
1269 #ifndef HAVE_ONLY_PROCFS_SEQ
1270                                  lvars.module_vars,
1271 #endif
1272                                  LUSTRE_LWP_NAME, &lwp_device_type);
1273         if (rc != 0) {
1274                 class_unregister_type(LUSTRE_OSP_NAME);
1275                 lu_kmem_fini(osp_caches);
1276                 return rc;
1277         }
1278
1279         /* Note: add_rec/delcare_add_rec will be only used by catalogs */
1280         osp_mds_ost_orig_logops = llog_osd_ops;
1281         osp_mds_ost_orig_logops.lop_add = llog_cat_add_rec;
1282         osp_mds_ost_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1283
1284         /* create "osc" entry in procfs for compatibility purposes */
1285         type = class_search_type(LUSTRE_OSC_NAME);
1286         if (type != NULL && type->typ_procroot != NULL)
1287                 return rc;
1288
1289         type = class_search_type(LUSTRE_OSP_NAME);
1290         type->typ_procsym = lprocfs_register("osc", proc_lustre_root,
1291                                              NULL, NULL);
1292         if (IS_ERR(type->typ_procsym))
1293                 CERROR("osp: can't create compat entry \"osc\": %d\n",
1294                        (int) PTR_ERR(type->typ_procsym));
1295         return rc;
1296 }
1297
1298 static void __exit osp_mod_exit(void)
1299 {
1300         lprocfs_try_remove_proc_entry("osc", proc_lustre_root);
1301
1302         class_unregister_type(LUSTRE_LWP_NAME);
1303         class_unregister_type(LUSTRE_OSP_NAME);
1304         lu_kmem_fini(osp_caches);
1305 }
1306
1307 MODULE_AUTHOR("Intel, Inc. <http://www.intel.com/>");
1308 MODULE_DESCRIPTION("Lustre OST Proxy Device ("LUSTRE_OSP_NAME")");
1309 MODULE_LICENSE("GPL");
1310
1311 cfs_module(osp, LUSTRE_VERSION_STRING, osp_mod_init, osp_mod_exit);