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