lustre/osp/osp_dev.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2012, 2013, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/osp/osp_dev.c
  37  *
  38  * Lustre OST Proxy Device
  39  *
  40  * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
  41  * Author: Mikhail Pershin <mike.pershin@intel.com>
  42  * Author: Di Wang <di.wang@intel.com>
  43  */
  44
  45 #define DEBUG_SUBSYSTEM S_MDS
  46
  47 #include <obd_class.h>
  48 #include <lustre_param.h>
  49 #include <lustre_log.h>
  50 #include <lustre_mdc.h>
  51
  52 #include "osp_internal.h"
  53
  54 /* Slab for OSP object allocation */
  55 struct kmem_cache *osp_object_kmem;
  56
  57 static struct lu_kmem_descr osp_caches[] = {
  58         {
  59                 .ckd_cache = &osp_object_kmem,
  60                 .ckd_name  = "osp_obj",
  61                 .ckd_size  = sizeof(struct osp_object)
  62         },
  63         {
  64                 .ckd_cache = NULL
  65         }
  66 };
  67
  68 struct lu_object *osp_object_alloc(const struct lu_env *env,
  69                                    const struct lu_object_header *hdr,
  70                                    struct lu_device *d)
  71 {
  72         struct lu_object_header *h = NULL;
  73         struct osp_object       *o;
  74         struct lu_object        *l;
  75
  76         OBD_SLAB_ALLOC_PTR_GFP(o, osp_object_kmem, __GFP_IO);
  77         if (o != NULL) {
  78                 l = &o->opo_obj.do_lu;
  79
  80                 /* If hdr is NULL, it means the object is not built
  81                  * from the top dev(MDT/OST), usually it happens when
  82                  * building striped object, like data object on MDT or
  83                  * striped object for directory */
  84                 if (hdr == NULL) {
  85                         h = &o->opo_header;
  86                         lu_object_header_init(h);
  87                         dt_object_init(&o->opo_obj, h, d);
  88                         lu_object_add_top(h, l);
  89                 } else {
  90                         dt_object_init(&o->opo_obj, h, d);
  91                 }
  92
  93                 l->lo_ops = &osp_lu_obj_ops;
  94
  95                 return l;
  96         } else {
  97                 return NULL;
  98         }
  99 }
 100
 101 static struct dt_object
 102 *osp_find_or_create(const struct lu_env *env, struct osp_device *osp,
 103                     struct lu_attr *attr, __u32 reg_id)
 104 {
 105         struct osp_thread_info *osi = osp_env_info(env);
 106         struct dt_object_format dof = { 0 };
 107         struct dt_object       *dto;
 108         int                  rc;
 109         ENTRY;
 110
 111         lu_local_obj_fid(&osi->osi_fid, reg_id);
 112         attr->la_valid = LA_MODE;
 113         attr->la_mode = S_IFREG | 0644;
 114         dof.dof_type = DFT_REGULAR;
 115         dto = dt_find_or_create(env, osp->opd_storage, &osi->osi_fid,
 116                                 &dof, attr);
 117         if (IS_ERR(dto))
 118                 RETURN(dto);
 119
 120         rc = dt_attr_get(env, dto, attr, NULL);
 121         if (rc) {
 122                 CERROR("%s: can't be initialized: rc = %d\n",
 123                        osp->opd_obd->obd_name, rc);
 124                 lu_object_put(env, &dto->do_lu);
 125                 RETURN(ERR_PTR(rc));
 126         }
 127         RETURN(dto);
 128 }
 129
 130 static int osp_write_local_file(const struct lu_env *env,
 131                                 struct osp_device *osp,
 132                                 struct dt_object *dt_obj,
 133                                 struct lu_buf *buf,
 134                                 loff_t offset)
 135 {
 136         struct thandle *th;
 137         int rc;
 138
 139         th = dt_trans_create(env, osp->opd_storage);
 140         if (IS_ERR(th))
 141                 RETURN(PTR_ERR(th));
 142
 143         rc = dt_declare_record_write(env, dt_obj, buf->lb_len, offset, th);
 144         if (rc)
 145                 GOTO(out, rc);
 146         rc = dt_trans_start_local(env, osp->opd_storage, th);
 147         if (rc)
 148                 GOTO(out, rc);
 149
 150         rc = dt_record_write(env, dt_obj, buf, &offset, th);
 151 out:
 152         dt_trans_stop(env, osp->opd_storage, th);
 153         RETURN(rc);
 154 }
 155
 156 static int osp_init_last_objid(const struct lu_env *env, struct osp_device *osp)
 157 {
 158         struct osp_thread_info  *osi = osp_env_info(env);
 159         struct lu_fid           *fid = &osp->opd_last_used_fid;
 160         struct dt_object        *dto;
 161         int                     rc;
 162         ENTRY;
 163
 164         dto = osp_find_or_create(env, osp, &osi->osi_attr, MDD_LOV_OBJ_OID);
 165         if (IS_ERR(dto))
 166                 RETURN(PTR_ERR(dto));
 167         /* object will be released in device cleanup path */
 168         if (osi->osi_attr.la_size >=
 169             sizeof(osi->osi_id) * (osp->opd_index + 1)) {
 170                 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
 171                                    osp->opd_index);
 172                 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
 173                 if (rc != 0)
 174                         GOTO(out, rc);
 175         } else {
 176                 fid->f_oid = 0;
 177                 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
 178                                    osp->opd_index);
 179                 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
 180                                           osi->osi_off);
 181         }
 182         osp->opd_last_used_oid_file = dto;
 183         RETURN(0);
 184 out:
 185         /* object will be released in device cleanup path */
 186         CERROR("%s: can't initialize lov_objid: rc = %d\n",
 187                osp->opd_obd->obd_name, rc);
 188         lu_object_put(env, &dto->do_lu);
 189         osp->opd_last_used_oid_file = NULL;
 190         RETURN(rc);
 191 }
 192
 193 static int osp_init_last_seq(const struct lu_env *env, struct osp_device *osp)
 194 {
 195         struct osp_thread_info  *osi = osp_env_info(env);
 196         struct lu_fid           *fid = &osp->opd_last_used_fid;
 197         struct dt_object        *dto;
 198         int                     rc;
 199         ENTRY;
 200
 201         dto = osp_find_or_create(env, osp, &osi->osi_attr, MDD_LOV_OBJ_OSEQ);
 202         if (IS_ERR(dto))
 203                 RETURN(PTR_ERR(dto));
 204
 205         /* object will be released in device cleanup path */
 206         if (osi->osi_attr.la_size >=
 207             sizeof(osi->osi_id) * (osp->opd_index + 1)) {
 208                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
 209                                    osp->opd_index);
 210                 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
 211                 if (rc != 0)
 212                         GOTO(out, rc);
 213         } else {
 214                 fid->f_seq = 0;
 215                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
 216                                     osp->opd_index);
 217                 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
 218                                           osi->osi_off);
 219         }
 220         osp->opd_last_used_seq_file = dto;
 221         RETURN(0);
 222 out:
 223         /* object will be released in device cleanup path */
 224         CERROR("%s: can't initialize lov_seq: rc = %d\n",
 225                osp->opd_obd->obd_name, rc);
 226         lu_object_put(env, &dto->do_lu);
 227         osp->opd_last_used_seq_file = NULL;
 228         RETURN(rc);
 229 }
 230
 231 static int osp_last_used_init(const struct lu_env *env, struct osp_device *osp)
 232 {
 233         struct osp_thread_info *osi = osp_env_info(env);
 234         int                  rc;
 235         ENTRY;
 236
 237         fid_zero(&osp->opd_last_used_fid);
 238         rc = osp_init_last_objid(env, osp);
 239         if (rc < 0) {
 240                 CERROR("%s: Can not get ids %d from old objid!\n",
 241                        osp->opd_obd->obd_name, rc);
 242                 RETURN(rc);
 243         }
 244
 245         rc = osp_init_last_seq(env, osp);
 246         if (rc < 0) {
 247                 CERROR("%s: Can not get ids %d from old objid!\n",
 248                        osp->opd_obd->obd_name, rc);
 249                 GOTO(out, rc);
 250         }
 251
 252         if (fid_oid(&osp->opd_last_used_fid) != 0 &&
 253             fid_seq(&osp->opd_last_used_fid) == 0) {
 254                 /* Just upgrade from the old version,
 255                  * set the seq to be IDIF */
 256                 osp->opd_last_used_fid.f_seq =
 257                    fid_idif_seq(fid_oid(&osp->opd_last_used_fid),
 258                                 osp->opd_index);
 259                 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off,
 260                                     &osp->opd_last_used_fid.f_seq,
 261                                     osp->opd_index);
 262                 rc = osp_write_local_file(env, osp, osp->opd_last_used_seq_file,
 263                                           &osi->osi_lb, osi->osi_off);
 264                 if (rc) {
 265                         CERROR("%s : Can not write seq file: rc = %d\n",
 266                                osp->opd_obd->obd_name, rc);
 267                         GOTO(out, rc);
 268                 }
 269         }
 270
 271         if (!fid_is_zero(&osp->opd_last_used_fid) &&
 272                  !fid_is_sane(&osp->opd_last_used_fid)) {
 273                 CERROR("%s: Got invalid FID "DFID"\n", osp->opd_obd->obd_name,
 274                         PFID(&osp->opd_last_used_fid));
 275                 GOTO(out, rc = -EINVAL);
 276         }
 277
 278         CDEBUG(D_INFO, "%s: Init last used fid "DFID"\n",
 279                osp->opd_obd->obd_name, PFID(&osp->opd_last_used_fid));
 280 out:
 281         if (rc != 0) {
 282                 if (osp->opd_last_used_oid_file != NULL) {
 283                         lu_object_put(env, &osp->opd_last_used_oid_file->do_lu);
 284                         osp->opd_last_used_oid_file = NULL;
 285                 }
 286                 if (osp->opd_last_used_seq_file != NULL) {
 287                         lu_object_put(env, &osp->opd_last_used_seq_file->do_lu);
 288                         osp->opd_last_used_seq_file = NULL;
 289                 }
 290         }
 291
 292         RETURN(rc);
 293 }
 294
 295 static void osp_last_used_fini(const struct lu_env *env, struct osp_device *d)
 296 {
 297         /* release last_used file */
 298         if (d->opd_last_used_oid_file != NULL) {
 299                 lu_object_put(env, &d->opd_last_used_oid_file->do_lu);
 300                 d->opd_last_used_oid_file = NULL;
 301         }
 302
 303         if (d->opd_last_used_seq_file != NULL) {
 304                 lu_object_put(env, &d->opd_last_used_seq_file->do_lu);
 305                 d->opd_last_used_seq_file = NULL;
 306         }
 307 }
 308
 309 static int osp_disconnect(struct osp_device *d)
 310 {
 311         struct obd_import *imp;
 312         int rc = 0;
 313
 314         imp = d->opd_obd->u.cli.cl_import;
 315
 316         /* Mark import deactivated now, so we don't try to reconnect if any
 317          * of the cleanup RPCs fails (e.g. ldlm cancel, etc).  We don't
 318          * fully deactivate the import, or that would drop all requests. */
 319         LASSERT(imp != NULL);
 320         spin_lock(&imp->imp_lock);
 321         imp->imp_deactive = 1;
 322         spin_unlock(&imp->imp_lock);
 323
 324         ptlrpc_deactivate_import(imp);
 325
 326         /* Some non-replayable imports (MDS's OSCs) are pinged, so just
 327          * delete it regardless.  (It's safe to delete an import that was
 328          * never added.) */
 329         (void)ptlrpc_pinger_del_import(imp);
 330
 331         rc = ptlrpc_disconnect_import(imp, 0);
 332         if (rc != 0)
 333                 CERROR("%s: can't disconnect: rc = %d\n",
 334                        d->opd_obd->obd_name, rc);
 335
 336         ptlrpc_invalidate_import(imp);
 337
 338         RETURN(rc);
 339 }
 340
 341 static int osp_shutdown(const struct lu_env *env, struct osp_device *d)
 342 {
 343         int                      rc = 0;
 344         ENTRY;
 345
 346         LASSERT(env);
 347
 348         rc = osp_disconnect(d);
 349
 350         if (!d->opd_connect_mdt) {
 351                 /* stop sync thread */
 352                 osp_sync_fini(d);
 353
 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         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_async_requests != NULL) {
 821                 out_destroy_update_req(m->opd_async_requests);
 822                 m->opd_async_requests = NULL;
 823         }
 824
 825         if (m->opd_storage_exp)
 826                 obd_disconnect(m->opd_storage_exp);
 827
 828         imp = m->opd_obd->u.cli.cl_import;
 829
 830         if (imp->imp_rq_pool) {
 831                 ptlrpc_free_rq_pool(imp->imp_rq_pool);
 832                 imp->imp_rq_pool = NULL;
 833         }
 834
 835         if (m->opd_symlink)
 836                 lprocfs_remove(&m->opd_symlink);
 837
 838         LASSERT(m->opd_obd);
 839         ptlrpc_lprocfs_unregister_obd(m->opd_obd);
 840         lprocfs_obd_cleanup(m->opd_obd);
 841
 842         if (m->opd_connect_mdt) {
 843                 struct client_obd *cli = &m->opd_obd->u.cli;
 844                 if (cli->cl_rpc_lock != NULL) {
 845                         OBD_FREE_PTR(cli->cl_rpc_lock);
 846                         cli->cl_rpc_lock = NULL;
 847                 }
 848         }
 849
 850         rc = client_obd_cleanup(m->opd_obd);
 851         LASSERTF(rc == 0, "error %d\n", rc);
 852
 853         ptlrpcd_decref();
 854
 855         RETURN(NULL);
 856 }
 857
 858 static int osp_reconnect(const struct lu_env *env,
 859                          struct obd_export *exp, struct obd_device *obd,
 860                          struct obd_uuid *cluuid,
 861                          struct obd_connect_data *data,
 862                          void *localdata)
 863 {
 864         return 0;
 865 }
 866
 867 static int osp_prepare_fid_client(struct osp_device *osp)
 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         return 0;
 877 }
 878
 879 /*
 880  * we use exports to track all LOD users
 881  */
 882 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
 883                            struct obd_device *obd, struct obd_uuid *cluuid,
 884                            struct obd_connect_data *data, void *localdata)
 885 {
 886         struct osp_device       *osp = lu2osp_dev(obd->obd_lu_dev);
 887         struct obd_connect_data *ocd;
 888         struct obd_import       *imp;
 889         struct lustre_handle     conn;
 890         int                      rc;
 891
 892         ENTRY;
 893
 894         CDEBUG(D_CONFIG, "connect #%d\n", osp->opd_connects);
 895
 896         rc = class_connect(&conn, obd, cluuid);
 897         if (rc)
 898                 RETURN(rc);
 899
 900         *exp = class_conn2export(&conn);
 901         /* Why should there ever be more than 1 connect? */
 902         osp->opd_connects++;
 903         LASSERT(osp->opd_connects == 1);
 904
 905         osp->opd_exp = *exp;
 906
 907         imp = osp->opd_obd->u.cli.cl_import;
 908         imp->imp_dlm_handle = conn;
 909
 910         LASSERT(data != NULL);
 911         LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
 912         ocd = &imp->imp_connect_data;
 913         *ocd = *data;
 914
 915         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 916
 917         ocd->ocd_version = LUSTRE_VERSION_CODE;
 918         ocd->ocd_index = data->ocd_index;
 919         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 920
 921         rc = ptlrpc_connect_import(imp);
 922         if (rc) {
 923                 CERROR("%s: can't connect obd: rc = %d\n", obd->obd_name, rc);
 924                 GOTO(out, rc);
 925         }
 926
 927         ptlrpc_pinger_add_import(imp);
 928 out:
 929         RETURN(rc);
 930 }
 931
 932 /*
 933  * once last export (we don't count self-export) disappeared
 934  * osp can be released
 935  */
 936 static int osp_obd_disconnect(struct obd_export *exp)
 937 {
 938         struct obd_device *obd = exp->exp_obd;
 939         struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
 940         int                rc;
 941         ENTRY;
 942
 943         /* Only disconnect the underlying layers on the final disconnect. */
 944         LASSERT(osp->opd_connects == 1);
 945         osp->opd_connects--;
 946
 947         rc = class_disconnect(exp);
 948         if (rc) {
 949                 CERROR("%s: class disconnect error: rc = %d\n",
 950                        obd->obd_name, rc);
 951                 RETURN(rc);
 952         }
 953
 954         /* destroy the device */
 955         class_manual_cleanup(obd);
 956
 957         RETURN(rc);
 958 }
 959
 960 /*
 961  * lprocfs helpers still use OBD API, let's keep obd_statfs() support
 962  */
 963 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
 964                           struct obd_statfs *osfs, __u64 max_age, __u32 flags)
 965 {
 966         struct obd_statfs       *msfs;
 967         struct ptlrpc_request   *req;
 968         struct obd_import       *imp = NULL;
 969         int                      rc;
 970
 971         ENTRY;
 972
 973         /* Since the request might also come from lprocfs, so we need
 974          * sync this with client_disconnect_export Bug15684 */
 975         down_read(&exp->exp_obd->u.cli.cl_sem);
 976         if (exp->exp_obd->u.cli.cl_import)
 977                 imp = class_import_get(exp->exp_obd->u.cli.cl_import);
 978         up_read(&exp->exp_obd->u.cli.cl_sem);
 979         if (!imp)
 980                 RETURN(-ENODEV);
 981
 982         /* We could possibly pass max_age in the request (as an absolute
 983          * timestamp or a "seconds.usec ago") so the target can avoid doing
 984          * extra calls into the filesystem if that isn't necessary (e.g.
 985          * during mount that would help a bit).  Having relative timestamps
 986          * is not so great if request processing is slow, while absolute
 987          * timestamps are not ideal because they need time synchronization. */
 988         req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 989
 990         class_import_put(imp);
 991
 992         if (req == NULL)
 993                 RETURN(-ENOMEM);
 994
 995         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
 996         if (rc) {
 997                 ptlrpc_request_free(req);
 998                 RETURN(rc);
 999         }
1000         ptlrpc_request_set_replen(req);
1001         req->rq_request_portal = OST_CREATE_PORTAL;
1002         ptlrpc_at_set_req_timeout(req);
1003
1004         if (flags & OBD_STATFS_NODELAY) {
1005                 /* procfs requests not want stat in wait for avoid deadlock */
1006                 req->rq_no_resend = 1;
1007                 req->rq_no_delay = 1;
1008         }
1009
1010         rc = ptlrpc_queue_wait(req);
1011         if (rc)
1012                 GOTO(out, rc);
1013
1014         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1015         if (msfs == NULL)
1016                 GOTO(out, rc = -EPROTO);
1017
1018         *osfs = *msfs;
1019
1020         EXIT;
1021 out:
1022         ptlrpc_req_finished(req);
1023         return rc;
1024 }
1025
1026 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1027                             enum obd_import_event event)
1028 {
1029         struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1030
1031         switch (event) {
1032         case IMP_EVENT_DISCON:
1033                 d->opd_got_disconnected = 1;
1034                 d->opd_imp_connected = 0;
1035                 if (d->opd_connect_mdt)
1036                         break;
1037
1038                 if (d->opd_pre != NULL) {
1039                         osp_pre_update_status(d, -ENODEV);
1040                         wake_up(&d->opd_pre_waitq);
1041                 }
1042
1043                 CDEBUG(D_HA, "got disconnected\n");
1044                 break;
1045         case IMP_EVENT_INACTIVE:
1046                 d->opd_imp_active = 0;
1047                 if (d->opd_connect_mdt)
1048                         break;
1049
1050                 if (d->opd_pre != NULL) {
1051                         osp_pre_update_status(d, -ENODEV);
1052                         wake_up(&d->opd_pre_waitq);
1053                 }
1054
1055                 CDEBUG(D_HA, "got inactive\n");
1056                 break;
1057         case IMP_EVENT_ACTIVE:
1058                 d->opd_imp_active = 1;
1059
1060                 if (osp_prepare_fid_client(d) != 0)
1061                         break;
1062
1063                 if (d->opd_got_disconnected)
1064                         d->opd_new_connection = 1;
1065                 d->opd_imp_connected = 1;
1066                 d->opd_imp_seen_connected = 1;
1067                 if (d->opd_connect_mdt)
1068                         break;
1069
1070                 if (d->opd_pre != NULL)
1071                         wake_up(&d->opd_pre_waitq);
1072
1073                 __osp_sync_check_for_work(d);
1074                 CDEBUG(D_HA, "got connected\n");
1075                 break;
1076         case IMP_EVENT_INVALIDATE:
1077                 if (obd->obd_namespace == NULL)
1078                         break;
1079                 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1080                 break;
1081         case IMP_EVENT_OCD:
1082         case IMP_EVENT_DEACTIVATE:
1083         case IMP_EVENT_ACTIVATE:
1084                 break;
1085         default:
1086                 CERROR("%s: unsupported import event: %#x\n",
1087                        obd->obd_name, event);
1088         }
1089         return 0;
1090 }
1091
1092 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1093                          void *karg, void *uarg)
1094 {
1095         struct obd_device       *obd = exp->exp_obd;
1096         struct osp_device       *d;
1097         struct obd_ioctl_data   *data = karg;
1098         int                      rc = 0;
1099
1100         ENTRY;
1101
1102         LASSERT(obd->obd_lu_dev);
1103         d = lu2osp_dev(obd->obd_lu_dev);
1104         LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1105
1106         if (!try_module_get(THIS_MODULE)) {
1107                 CERROR("%s: can't get module. Is it alive?", obd->obd_name);
1108                 return -EINVAL;
1109         }
1110
1111         switch (cmd) {
1112         case OBD_IOC_CLIENT_RECOVER:
1113                 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1114                                            data->ioc_inlbuf1, 0);
1115                 if (rc > 0)
1116                         rc = 0;
1117                 break;
1118         case IOC_OSC_SET_ACTIVE:
1119                 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1120                                               data->ioc_offset);
1121                 break;
1122         case OBD_IOC_PING_TARGET:
1123                 rc = ptlrpc_obd_ping(obd);
1124                 break;
1125         default:
1126                 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1127                        cmd, current_comm());
1128                 rc = -ENOTTY;
1129         }
1130         module_put(THIS_MODULE);
1131         return rc;
1132 }
1133
1134 static int osp_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1135                             __u32 keylen, void *key, __u32 *vallen, void *val,
1136                             struct lov_stripe_md *lsm)
1137 {
1138         int rc = -EINVAL;
1139
1140         if (KEY_IS(KEY_OSP_CONNECTED)) {
1141                 struct obd_device       *obd = exp->exp_obd;
1142                 struct osp_device       *osp;
1143
1144                 if (!obd->obd_set_up || obd->obd_stopping)
1145                         RETURN(-EAGAIN);
1146
1147                 osp = lu2osp_dev(obd->obd_lu_dev);
1148                 LASSERT(osp);
1149                 /*
1150                  * 1.8/2.0 behaviour is that OST being connected once at least
1151                  * is considered "healthy". and one "healthy" OST is enough to
1152                  * allow lustre clients to connect to MDS
1153                  */
1154                 RETURN(!osp->opd_imp_seen_connected);
1155         }
1156
1157         RETURN(rc);
1158 }
1159
1160 int osp_fid_alloc(struct obd_export *exp, struct lu_fid *fid,
1161                   struct md_op_data *op_data)
1162 {
1163         struct client_obd *cli = &exp->exp_obd->u.cli;
1164         struct lu_client_seq *seq = cli->cl_seq;
1165
1166         ENTRY;
1167         RETURN(seq_client_alloc_fid(NULL, seq, fid));
1168 }
1169
1170 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1171 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1172 static void osp_key_exit(const struct lu_context *ctx,
1173                          struct lu_context_key *key, void *data)
1174 {
1175         struct osp_thread_info *info = data;
1176
1177         info->osi_attr.la_valid = 0;
1178 }
1179
1180 struct lu_context_key osp_thread_key = {
1181         .lct_tags = LCT_MD_THREAD,
1182         .lct_init = osp_key_init,
1183         .lct_fini = osp_key_fini,
1184         .lct_exit = osp_key_exit
1185 };
1186
1187 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1188 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1189
1190 struct lu_context_key osp_txn_key = {
1191         .lct_tags = LCT_OSP_THREAD | LCT_TX_HANDLE,
1192         .lct_init = osp_txn_key_init,
1193         .lct_fini = osp_txn_key_fini
1194 };
1195 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1196
1197 static struct lu_device_type_operations osp_device_type_ops = {
1198         .ldto_init           = osp_type_init,
1199         .ldto_fini           = osp_type_fini,
1200
1201         .ldto_start          = osp_type_start,
1202         .ldto_stop           = osp_type_stop,
1203
1204         .ldto_device_alloc   = osp_device_alloc,
1205         .ldto_device_free    = osp_device_free,
1206
1207         .ldto_device_fini    = osp_device_fini
1208 };
1209
1210 static struct lu_device_type osp_device_type = {
1211         .ldt_tags     = LU_DEVICE_DT,
1212         .ldt_name     = LUSTRE_OSP_NAME,
1213         .ldt_ops      = &osp_device_type_ops,
1214         .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
1215 };
1216
1217 static struct obd_ops osp_obd_device_ops = {
1218         .o_owner        = THIS_MODULE,
1219         .o_add_conn     = client_import_add_conn,
1220         .o_del_conn     = client_import_del_conn,
1221         .o_reconnect    = osp_reconnect,
1222         .o_connect      = osp_obd_connect,
1223         .o_disconnect   = osp_obd_disconnect,
1224         .o_get_info     = osp_obd_get_info,
1225         .o_import_event = osp_import_event,
1226         .o_iocontrol    = osp_iocontrol,
1227         .o_statfs       = osp_obd_statfs,
1228         .o_fid_init     = client_fid_init,
1229         .o_fid_fini     = client_fid_fini,
1230         .o_fid_alloc    = osp_fid_alloc,
1231 };
1232
1233 struct llog_operations osp_mds_ost_orig_logops;
1234
1235 static int __init osp_mod_init(void)
1236 {
1237         struct lprocfs_static_vars       lvars;
1238         cfs_proc_dir_entry_t            *osc_proc_dir;
1239         int                              rc;
1240
1241         rc = lu_kmem_init(osp_caches);
1242         if (rc)
1243                 return rc;
1244
1245         lprocfs_osp_init_vars(&lvars);
1246
1247         rc = class_register_type(&osp_obd_device_ops, NULL, NULL,
1248 #ifndef HAVE_ONLY_PROCFS_SEQ
1249                                 lvars.module_vars,
1250 #endif
1251                                 LUSTRE_OSP_NAME, &osp_device_type);
1252
1253         /* create "osc" entry in procfs for compatibility purposes */
1254         if (rc != 0) {
1255                 lu_kmem_fini(osp_caches);
1256                 return rc;
1257         }
1258
1259         lprocfs_lwp_init_vars(&lvars);
1260
1261         rc = class_register_type(&lwp_obd_device_ops, NULL, NULL,
1262 #ifndef HAVE_ONLY_PROCFS_SEQ
1263                                 lvars.module_vars,
1264 #endif
1265                                 LUSTRE_LWP_NAME, &lwp_device_type);
1266         if (rc != 0) {
1267                 class_unregister_type(LUSTRE_OSP_NAME);
1268                 lu_kmem_fini(osp_caches);
1269                 return rc;
1270         }
1271
1272         /* Note: add_rec/delcare_add_rec will be only used by catalogs */
1273         osp_mds_ost_orig_logops = llog_osd_ops;
1274         osp_mds_ost_orig_logops.lop_add = llog_cat_add_rec;
1275         osp_mds_ost_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1276
1277         osc_proc_dir = lprocfs_srch(proc_lustre_root, "osc");
1278         if (osc_proc_dir == NULL) {
1279                 osc_proc_dir = lprocfs_register("osc", proc_lustre_root, NULL,
1280                                                 NULL);
1281                 if (IS_ERR(osc_proc_dir))
1282                         CERROR("osp: can't create compat entry \"osc\": %d\n",
1283                                (int) PTR_ERR(osc_proc_dir));
1284         }
1285         return rc;
1286 }
1287
1288 static void __exit osp_mod_exit(void)
1289 {
1290         lprocfs_try_remove_proc_entry("osc", proc_lustre_root);
1291
1292         class_unregister_type(LUSTRE_LWP_NAME);
1293         class_unregister_type(LUSTRE_OSP_NAME);
1294         lu_kmem_fini(osp_caches);
1295 }
1296
1297 MODULE_AUTHOR("Intel, Inc. <http://www.intel.com/>");
1298 MODULE_DESCRIPTION("Lustre OST Proxy Device ("LUSTRE_OSP_NAME")");
1299 MODULE_LICENSE("GPL");
1300
1301 cfs_module(osp, LUSTRE_VERSION_STRING, osp_mod_init, osp_mod_exit);