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 lprocfs_static_vars       lvars = { 0 };
 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                 lprocfs_osp_init_vars(&lvars);
 389
 390                 LASSERT(d->opd_obd);
 391                 rc = class_process_proc_param(PARAM_OSC, lvars.obd_vars,
 392                                               lcfg, d->opd_obd);
 393                 if (rc > 0)
 394                         rc = 0;
 395                 if (rc == -ENOSYS) {
 396                         /* class_process_proc_param() haven't found matching
 397                          * parameter and returned ENOSYS so that layer(s)
 398                          * below could use that. But OSP is the bottom, so
 399                          * just ignore it */
 400                         CERROR("%s: unknown param %s\n",
 401                                (char *)lustre_cfg_string(lcfg, 0),
 402                                (char *)lustre_cfg_string(lcfg, 1));
 403                         rc = 0;
 404                 }
 405                 break;
 406         default:
 407                 CERROR("%s: unknown command %u\n",
 408                        (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
 409                 rc = 0;
 410                 break;
 411         }
 412
 413         RETURN(rc);
 414 }
 415
 416 static int osp_recovery_complete(const struct lu_env *env,
 417                                  struct lu_device *dev)
 418 {
 419         struct osp_device       *osp = lu2osp_dev(dev);
 420         int                      rc = 0;
 421
 422         ENTRY;
 423         osp->opd_recovery_completed = 1;
 424         if (!osp->opd_connect_mdt)
 425                 wake_up(&osp->opd_pre_waitq);
 426         RETURN(rc);
 427 }
 428
 429 const struct lu_device_operations osp_lu_ops = {
 430         .ldo_object_alloc       = osp_object_alloc,
 431         .ldo_process_config     = osp_process_config,
 432         .ldo_recovery_complete  = osp_recovery_complete,
 433 };
 434
 435 /**
 436  * provides with statfs from corresponded OST
 437  *
 438  */
 439 static int osp_statfs(const struct lu_env *env, struct dt_device *dev,
 440                       struct obd_statfs *sfs)
 441 {
 442         struct osp_device *d = dt2osp_dev(dev);
 443
 444         ENTRY;
 445
 446         if (unlikely(d->opd_imp_active == 0))
 447                 RETURN(-ENOTCONN);
 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
 457         spin_lock(&d->opd_pre_lock);
 458         LASSERTF(fid_seq(&d->opd_pre_last_created_fid) ==
 459                  fid_seq(&d->opd_pre_used_fid),
 460                  "last_created "DFID", next_fid "DFID"\n",
 461                  PFID(&d->opd_pre_last_created_fid),
 462                  PFID(&d->opd_pre_used_fid));
 463         sfs->os_fprecreated = fid_oid(&d->opd_pre_last_created_fid) -
 464                               fid_oid(&d->opd_pre_used_fid);
 465         sfs->os_fprecreated -= d->opd_pre_reserved;
 466         spin_unlock(&d->opd_pre_lock);
 467
 468         LASSERT(sfs->os_fprecreated <= OST_MAX_PRECREATE * 2);
 469
 470         CDEBUG(D_OTHER, "%s: "LPU64" blocks, "LPU64" free, "LPU64" avail, "
 471                LPU64" files, "LPU64" free files\n", d->opd_obd->obd_name,
 472                sfs->os_blocks, sfs->os_bfree, sfs->os_bavail,
 473                sfs->os_files, sfs->os_ffree);
 474         RETURN(0);
 475 }
 476
 477 static int osp_sync(const struct lu_env *env, struct dt_device *dev)
 478 {
 479         ENTRY;
 480
 481         /*
 482          * XXX: wake up sync thread, command it to start flushing asap?
 483          */
 484
 485         RETURN(0);
 486 }
 487
 488 const struct dt_device_operations osp_dt_ops = {
 489         .dt_statfs      = osp_statfs,
 490         .dt_sync        = osp_sync,
 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         obd = class_name2obd(lustre_cfg_string(cfg, 0));
 548         if (obd == NULL) {
 549                 CERROR("Cannot find obd with name %s\n",
 550                        lustre_cfg_string(cfg, 0));
 551                 RETURN(-ENODEV);
 552         }
 553         m->opd_obd = obd;
 554
 555         /* There is no record in the MDT configuration for the local disk
 556          * device, so we have to extract this from elsewhere in the profile.
 557          * The only information we get at setup is from the OSC records:
 558          * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
 559          * Note that 1.8 generated configs are missing the -MDTxxxx part.
 560          * We need to reconstruct the name of the underlying OSD from this:
 561          * {fsname}-{svname}-osd, for example "lustre-MDT0000-osd".  We
 562          * also need to determine the OST index from this - will be used
 563          * to calculate the offset in shared lov_objids file later */
 564
 565         src = lustre_cfg_string(cfg, 0);
 566         if (src == NULL)
 567                 RETURN(-EINVAL);
 568
 569         tgt = strrchr(src, '-');
 570         if (tgt == NULL) {
 571                 CERROR("%s: invalid target name %s\n",
 572                        m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 573                 RETURN(-EINVAL);
 574         }
 575
 576         if (strncmp(tgt, "-osc", 4) == 0) {
 577                 /* Old OSC name fsname-OSTXXXX-osc */
 578                 for (tgt--; tgt > src && *tgt != '-'; tgt--)
 579                         ;
 580                 if (tgt == src) {
 581                         CERROR("%s: invalid target name %s\n",
 582                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 583                         RETURN(-EINVAL);
 584                 }
 585
 586                 if (strncmp(tgt, "-OST", 4) != 0) {
 587                         CERROR("%s: invalid target name %s\n",
 588                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 589                         RETURN(-EINVAL);
 590                 }
 591
 592                 idx = simple_strtol(tgt + 4, &mdt, 16);
 593                 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
 594                         CERROR("%s: invalid OST index in '%s'\n",
 595                                m->opd_obd->obd_name, src);
 596                         RETURN(-EINVAL);
 597                 }
 598                 m->opd_index = idx;
 599                 m->opd_group = 0;
 600                 idx = tgt - src;
 601         } else {
 602                 /* New OSC name fsname-OSTXXXX-osc-MDTXXXX */
 603                 if (strncmp(tgt, "-MDT", 4) != 0 &&
 604                     strncmp(tgt, "-OST", 4) != 0) {
 605                         CERROR("%s: invalid target name %s\n",
 606                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 607                         RETURN(-EINVAL);
 608                 }
 609
 610                 idx = simple_strtol(tgt + 4, &mdt, 16);
 611                 if (*mdt != '\0' || idx > INT_MAX || idx < 0) {
 612                         CERROR("%s: invalid OST index in '%s'\n",
 613                                m->opd_obd->obd_name, src);
 614                         RETURN(-EINVAL);
 615                 }
 616
 617                 /* Get MDT index from the name and set it to opd_group,
 618                  * which will be used by OSP to connect with OST */
 619                 m->opd_group = idx;
 620                 if (tgt - src <= 12) {
 621                         CERROR("%s: invalid mdt index retrieve from %s\n",
 622                                m->opd_obd->obd_name, lustre_cfg_string(cfg, 0));
 623                         RETURN(-EINVAL);
 624                 }
 625
 626                 if (strncmp(tgt - 12, "-MDT", 4) == 0)
 627                         m->opd_connect_mdt = 1;
 628
 629                 idx = simple_strtol(tgt - 8, &mdt, 16);
 630                 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
 631                         CERROR("%s: invalid OST index in '%s'\n",
 632                                m->opd_obd->obd_name, src);
 633                         RETURN(-EINVAL);
 634                 }
 635
 636                 m->opd_index = idx;
 637                 idx = tgt - src - 12;
 638         }
 639         /* check the fsname length, and after this everything else will fit */
 640         if (idx > MTI_NAME_MAXLEN) {
 641                 CERROR("%s: fsname too long in '%s'\n",
 642                        m->opd_obd->obd_name, src);
 643                 RETURN(-EINVAL);
 644         }
 645
 646         OBD_ALLOC(osdname, MAX_OBD_NAME);
 647         if (osdname == NULL)
 648                 RETURN(-ENOMEM);
 649
 650         memcpy(osdname, src, idx); /* copy just the fsname part */
 651         osdname[idx] = '\0';
 652
 653         mdt = strstr(mdt, "-MDT");
 654         if (mdt == NULL) /* 1.8 configs don't have "-MDT0000" at the end */
 655                 strcat(osdname, "-MDT0000");
 656         else
 657                 strcat(osdname, mdt);
 658         strcat(osdname, "-osd");
 659         CDEBUG(D_HA, "%s: connect to %s (%s)\n", obd->obd_name, osdname, src);
 660
 661         if (m->opd_connect_mdt) {
 662                 struct client_obd *cli = &m->opd_obd->u.cli;
 663
 664                 OBD_ALLOC(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
 665                 if (!cli->cl_rpc_lock)
 666                         GOTO(out_fini, rc = -ENOMEM);
 667                 osp_init_rpc_lock(cli->cl_rpc_lock);
 668         }
 669
 670         m->opd_dt_dev.dd_lu_dev.ld_ops = &osp_lu_ops;
 671         m->opd_dt_dev.dd_ops = &osp_dt_ops;
 672         obd->obd_lu_dev = &m->opd_dt_dev.dd_lu_dev;
 673
 674         rc = osp_connect_to_osd(env, m, osdname);
 675         if (rc)
 676                 GOTO(out_fini, rc);
 677
 678         rc = ptlrpcd_addref();
 679         if (rc)
 680                 GOTO(out_disconnect, rc);
 681
 682         rc = client_obd_setup(obd, cfg);
 683         if (rc) {
 684                 CERROR("%s: can't setup obd: %d\n", m->opd_obd->obd_name, rc);
 685                 GOTO(out_ref, rc);
 686         }
 687
 688         osp_lprocfs_init(m);
 689
 690         if (!m->opd_connect_mdt) {
 691                 /* Initialize last id from the storage - will be
 692                  * used in orphan cleanup. */
 693                 rc = osp_last_used_init(env, m);
 694                 if (rc)
 695                         GOTO(out_proc, rc);
 696
 697                 rc = obd_fid_init(m->opd_obd, NULL, LUSTRE_SEQ_DATA);
 698                 if (rc) {
 699                         CERROR("%s: fid init error: rc = %d\n",
 700                                m->opd_obd->obd_name, rc);
 701                         GOTO(out_last_used, rc);
 702                 }
 703
 704                 /* Initialize precreation thread, it handles new
 705                  * connections as well. */
 706                 rc = osp_init_precreate(m);
 707                 if (rc)
 708                         GOTO(out_last_used, rc);
 709                 /*
 710                  * Initialize synhronization mechanism taking
 711                  * care of propogating changes to OST in near
 712                  * transactional manner.
 713                  */
 714                 rc = osp_sync_init(env, m);
 715                 if (rc)
 716                         GOTO(out_precreat, rc);
 717
 718         }
 719         /*
 720          * Initiate connect to OST
 721          */
 722         ll_generate_random_uuid(uuid);
 723         class_uuid_unparse(uuid, &m->opd_cluuid);
 724
 725         imp = obd->u.cli.cl_import;
 726
 727         rc = ptlrpc_init_import(imp);
 728         if (rc)
 729                 GOTO(out, rc);
 730         if (osdname)
 731                 OBD_FREE(osdname, MAX_OBD_NAME);
 732         RETURN(0);
 733
 734 out:
 735         if (!m->opd_connect_mdt)
 736                 /* stop sync thread */
 737                 osp_sync_fini(m);
 738 out_precreat:
 739         /* stop precreate thread */
 740         if (!m->opd_connect_mdt)
 741                 osp_precreate_fini(m);
 742 out_last_used:
 743         if (!m->opd_connect_mdt)
 744                 osp_last_used_fini(env, m);
 745 out_proc:
 746         ptlrpc_lprocfs_unregister_obd(obd);
 747         lprocfs_obd_cleanup(obd);
 748         obd_cleanup_client_import(obd);
 749         if (m->opd_symlink)
 750                 lprocfs_remove(&m->opd_symlink);
 751         client_obd_cleanup(obd);
 752 out_ref:
 753         ptlrpcd_decref();
 754 out_disconnect:
 755         if (m->opd_connect_mdt) {
 756                 struct client_obd *cli = &m->opd_obd->u.cli;
 757                 if (cli->cl_rpc_lock != NULL) {
 758                         OBD_FREE_PTR(cli->cl_rpc_lock);
 759                         cli->cl_rpc_lock = NULL;
 760                 }
 761         }
 762         obd_disconnect(m->opd_storage_exp);
 763 out_fini:
 764         if (osdname)
 765                 OBD_FREE(osdname, MAX_OBD_NAME);
 766         RETURN(rc);
 767 }
 768
 769 static struct lu_device *osp_device_free(const struct lu_env *env,
 770                                          struct lu_device *lu)
 771 {
 772         struct osp_device *m = lu2osp_dev(lu);
 773
 774         ENTRY;
 775
 776         if (cfs_atomic_read(&lu->ld_ref) && lu->ld_site) {
 777                 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
 778                 lu_site_print(env, lu->ld_site, &msgdata, lu_cdebug_printer);
 779         }
 780         dt_device_fini(&m->opd_dt_dev);
 781         OBD_FREE_PTR(m);
 782         RETURN(NULL);
 783 }
 784
 785 static struct lu_device *osp_device_alloc(const struct lu_env *env,
 786                                           struct lu_device_type *t,
 787                                           struct lustre_cfg *lcfg)
 788 {
 789         struct osp_device *m;
 790         struct lu_device  *l;
 791
 792         OBD_ALLOC_PTR(m);
 793         if (m == NULL) {
 794                 l = ERR_PTR(-ENOMEM);
 795         } else {
 796                 int rc;
 797
 798                 l = osp2lu_dev(m);
 799                 dt_device_init(&m->opd_dt_dev, t);
 800                 rc = osp_init0(env, m, t, lcfg);
 801                 if (rc != 0) {
 802                         osp_device_free(env, l);
 803                         l = ERR_PTR(rc);
 804                 }
 805         }
 806         return l;
 807 }
 808
 809 static struct lu_device *osp_device_fini(const struct lu_env *env,
 810                                          struct lu_device *d)
 811 {
 812         struct osp_device *m = lu2osp_dev(d);
 813         struct obd_import *imp;
 814         int                rc;
 815
 816         ENTRY;
 817
 818         if (m->opd_storage_exp)
 819                 obd_disconnect(m->opd_storage_exp);
 820
 821         imp = m->opd_obd->u.cli.cl_import;
 822
 823         if (imp->imp_rq_pool) {
 824                 ptlrpc_free_rq_pool(imp->imp_rq_pool);
 825                 imp->imp_rq_pool = NULL;
 826         }
 827
 828         obd_cleanup_client_import(m->opd_obd);
 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         }
 844
 845         rc = client_obd_cleanup(m->opd_obd);
 846         LASSERTF(rc == 0, "error %d\n", rc);
 847
 848         ptlrpcd_decref();
 849
 850         RETURN(NULL);
 851 }
 852
 853 static int osp_reconnect(const struct lu_env *env,
 854                          struct obd_export *exp, struct obd_device *obd,
 855                          struct obd_uuid *cluuid,
 856                          struct obd_connect_data *data,
 857                          void *localdata)
 858 {
 859         return 0;
 860 }
 861
 862 /*
 863  * we use exports to track all LOD users
 864  */
 865 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
 866                            struct obd_device *obd, struct obd_uuid *cluuid,
 867                            struct obd_connect_data *data, void *localdata)
 868 {
 869         struct osp_device       *osp = lu2osp_dev(obd->obd_lu_dev);
 870         struct obd_connect_data *ocd;
 871         struct obd_import       *imp;
 872         struct lustre_handle     conn;
 873         int                      rc;
 874
 875         ENTRY;
 876
 877         CDEBUG(D_CONFIG, "connect #%d\n", osp->opd_connects);
 878
 879         rc = class_connect(&conn, obd, cluuid);
 880         if (rc)
 881                 RETURN(rc);
 882
 883         *exp = class_conn2export(&conn);
 884         /* Why should there ever be more than 1 connect? */
 885         osp->opd_connects++;
 886         LASSERT(osp->opd_connects == 1);
 887
 888         osp->opd_exp = *exp;
 889
 890         imp = osp->opd_obd->u.cli.cl_import;
 891         imp->imp_dlm_handle = conn;
 892
 893         LASSERT(data != NULL);
 894         LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
 895         ocd = &imp->imp_connect_data;
 896         *ocd = *data;
 897
 898         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 899
 900         ocd->ocd_version = LUSTRE_VERSION_CODE;
 901         ocd->ocd_index = data->ocd_index;
 902         imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
 903
 904         rc = ptlrpc_connect_import(imp);
 905         if (rc) {
 906                 CERROR("%s: can't connect obd: rc = %d\n", obd->obd_name, rc);
 907                 GOTO(out, rc);
 908         }
 909
 910         ptlrpc_pinger_add_import(imp);
 911
 912         if (osp->opd_connect_mdt && data->ocd_index == 0) {
 913                 /* set seq controller export for MDC0 if exists */
 914                 struct seq_server_site *ss;
 915
 916                 ss = lu_site2seq(osp2lu_dev(osp)->ld_site);
 917                 ss->ss_control_exp = class_export_get(*exp);
 918                 ss->ss_server_fld->lsf_control_exp = *exp;
 919         }
 920 out:
 921         RETURN(rc);
 922 }
 923
 924 /*
 925  * once last export (we don't count self-export) disappeared
 926  * osp can be released
 927  */
 928 static int osp_obd_disconnect(struct obd_export *exp)
 929 {
 930         struct obd_device *obd = exp->exp_obd;
 931         struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
 932         int                rc;
 933         ENTRY;
 934
 935         /* Only disconnect the underlying layers on the final disconnect. */
 936         LASSERT(osp->opd_connects == 1);
 937         osp->opd_connects--;
 938
 939         rc = class_disconnect(exp);
 940         if (rc) {
 941                 CERROR("%s: class disconnect error: rc = %d\n",
 942                        obd->obd_name, rc);
 943                 RETURN(rc);
 944         }
 945
 946         /* destroy the device */
 947         class_manual_cleanup(obd);
 948
 949         RETURN(rc);
 950 }
 951
 952 /*
 953  * lprocfs helpers still use OBD API, let's keep obd_statfs() support
 954  */
 955 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
 956                           struct obd_statfs *osfs, __u64 max_age, __u32 flags)
 957 {
 958         struct obd_statfs       *msfs;
 959         struct ptlrpc_request   *req;
 960         struct obd_import       *imp = NULL;
 961         int                      rc;
 962
 963         ENTRY;
 964
 965         /* Since the request might also come from lprocfs, so we need
 966          * sync this with client_disconnect_export Bug15684 */
 967         down_read(&exp->exp_obd->u.cli.cl_sem);
 968         if (exp->exp_obd->u.cli.cl_import)
 969                 imp = class_import_get(exp->exp_obd->u.cli.cl_import);
 970         up_read(&exp->exp_obd->u.cli.cl_sem);
 971         if (!imp)
 972                 RETURN(-ENODEV);
 973
 974         /* We could possibly pass max_age in the request (as an absolute
 975          * timestamp or a "seconds.usec ago") so the target can avoid doing
 976          * extra calls into the filesystem if that isn't necessary (e.g.
 977          * during mount that would help a bit).  Having relative timestamps
 978          * is not so great if request processing is slow, while absolute
 979          * timestamps are not ideal because they need time synchronization. */
 980         req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
 981
 982         class_import_put(imp);
 983
 984         if (req == NULL)
 985                 RETURN(-ENOMEM);
 986
 987         rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
 988         if (rc) {
 989                 ptlrpc_request_free(req);
 990                 RETURN(rc);
 991         }
 992         ptlrpc_request_set_replen(req);
 993         req->rq_request_portal = OST_CREATE_PORTAL;
 994         ptlrpc_at_set_req_timeout(req);
 995
 996         if (flags & OBD_STATFS_NODELAY) {
 997                 /* procfs requests not want stat in wait for avoid deadlock */
 998                 req->rq_no_resend = 1;
 999                 req->rq_no_delay = 1;
1000         }
1001
1002         rc = ptlrpc_queue_wait(req);
1003         if (rc)
1004                 GOTO(out, rc);
1005
1006         msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1007         if (msfs == NULL)
1008                 GOTO(out, rc = -EPROTO);
1009
1010         *osfs = *msfs;
1011
1012         EXIT;
1013 out:
1014         ptlrpc_req_finished(req);
1015         return rc;
1016 }
1017
1018 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1019                             enum obd_import_event event)
1020 {
1021         struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1022
1023         switch (event) {
1024         case IMP_EVENT_DISCON:
1025                 d->opd_got_disconnected = 1;
1026                 d->opd_imp_connected = 0;
1027                 if (d->opd_connect_mdt)
1028                         break;
1029                 osp_pre_update_status(d, -ENODEV);
1030                 wake_up(&d->opd_pre_waitq);
1031                 CDEBUG(D_HA, "got disconnected\n");
1032                 break;
1033         case IMP_EVENT_INACTIVE:
1034                 d->opd_imp_active = 0;
1035                 if (d->opd_connect_mdt)
1036                         break;
1037                 osp_pre_update_status(d, -ENODEV);
1038                 wake_up(&d->opd_pre_waitq);
1039                 CDEBUG(D_HA, "got inactive\n");
1040                 break;
1041         case IMP_EVENT_ACTIVE:
1042                 d->opd_imp_active = 1;
1043                 if (d->opd_got_disconnected)
1044                         d->opd_new_connection = 1;
1045                 d->opd_imp_connected = 1;
1046                 d->opd_imp_seen_connected = 1;
1047                 if (d->opd_connect_mdt)
1048                         break;
1049                 wake_up(&d->opd_pre_waitq);
1050                 __osp_sync_check_for_work(d);
1051                 CDEBUG(D_HA, "got connected\n");
1052                 break;
1053         case IMP_EVENT_INVALIDATE:
1054                 if (obd->obd_namespace == NULL)
1055                         break;
1056                 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1057                 break;
1058         case IMP_EVENT_OCD:
1059         case IMP_EVENT_DEACTIVATE:
1060         case IMP_EVENT_ACTIVATE:
1061                 break;
1062         default:
1063                 CERROR("%s: unsupported import event: %#x\n",
1064                        obd->obd_name, event);
1065         }
1066         return 0;
1067 }
1068
1069 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1070                          void *karg, void *uarg)
1071 {
1072         struct obd_device       *obd = exp->exp_obd;
1073         struct osp_device       *d;
1074         struct obd_ioctl_data   *data = karg;
1075         int                      rc = 0;
1076
1077         ENTRY;
1078
1079         LASSERT(obd->obd_lu_dev);
1080         d = lu2osp_dev(obd->obd_lu_dev);
1081         LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1082
1083         if (!try_module_get(THIS_MODULE)) {
1084                 CERROR("%s: can't get module. Is it alive?", obd->obd_name);
1085                 return -EINVAL;
1086         }
1087
1088         switch (cmd) {
1089         case OBD_IOC_CLIENT_RECOVER:
1090                 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1091                                            data->ioc_inlbuf1, 0);
1092                 if (rc > 0)
1093                         rc = 0;
1094                 break;
1095         case IOC_OSC_SET_ACTIVE:
1096                 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1097                                               data->ioc_offset);
1098                 break;
1099         case OBD_IOC_PING_TARGET:
1100                 rc = ptlrpc_obd_ping(obd);
1101                 break;
1102         default:
1103                 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1104                        cmd, current_comm());
1105                 rc = -ENOTTY;
1106         }
1107         module_put(THIS_MODULE);
1108         return rc;
1109 }
1110
1111 static int osp_obd_health_check(const struct lu_env *env,
1112                                 struct obd_device *obd)
1113 {
1114         struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1115
1116         ENTRY;
1117
1118         /*
1119          * 1.8/2.0 behaviour is that OST being connected once at least
1120          * is considired "healthy". and one "healty" OST is enough to
1121          * allow lustre clients to connect to MDS
1122          */
1123         LASSERT(d);
1124         RETURN(!d->opd_imp_seen_connected);
1125 }
1126
1127 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1128 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1129 static void osp_key_exit(const struct lu_context *ctx,
1130                          struct lu_context_key *key, void *data)
1131 {
1132         struct osp_thread_info *info = data;
1133
1134         info->osi_attr.la_valid = 0;
1135 }
1136
1137 struct lu_context_key osp_thread_key = {
1138         .lct_tags = LCT_MD_THREAD,
1139         .lct_init = osp_key_init,
1140         .lct_fini = osp_key_fini,
1141         .lct_exit = osp_key_exit
1142 };
1143
1144 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1145 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1146
1147 struct lu_context_key osp_txn_key = {
1148         .lct_tags = LCT_OSP_THREAD,
1149         .lct_init = osp_txn_key_init,
1150         .lct_fini = osp_txn_key_fini
1151 };
1152 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1153
1154 static struct lu_device_type_operations osp_device_type_ops = {
1155         .ldto_init           = osp_type_init,
1156         .ldto_fini           = osp_type_fini,
1157
1158         .ldto_start          = osp_type_start,
1159         .ldto_stop           = osp_type_stop,
1160
1161         .ldto_device_alloc   = osp_device_alloc,
1162         .ldto_device_free    = osp_device_free,
1163
1164         .ldto_device_fini    = osp_device_fini
1165 };
1166
1167 static struct lu_device_type osp_device_type = {
1168         .ldt_tags     = LU_DEVICE_DT,
1169         .ldt_name     = LUSTRE_OSP_NAME,
1170         .ldt_ops      = &osp_device_type_ops,
1171         .ldt_ctx_tags = LCT_MD_THREAD
1172 };
1173
1174 static struct obd_ops osp_obd_device_ops = {
1175         .o_owner        = THIS_MODULE,
1176         .o_add_conn     = client_import_add_conn,
1177         .o_del_conn     = client_import_del_conn,
1178         .o_reconnect    = osp_reconnect,
1179         .o_connect      = osp_obd_connect,
1180         .o_disconnect   = osp_obd_disconnect,
1181         .o_health_check = osp_obd_health_check,
1182         .o_import_event = osp_import_event,
1183         .o_iocontrol    = osp_iocontrol,
1184         .o_statfs       = osp_obd_statfs,
1185         .o_fid_init     = client_fid_init,
1186         .o_fid_fini     = client_fid_fini,
1187 };
1188
1189 struct llog_operations osp_mds_ost_orig_logops;
1190
1191 static int __init osp_mod_init(void)
1192 {
1193         struct lprocfs_static_vars       lvars;
1194         cfs_proc_dir_entry_t            *osc_proc_dir;
1195         int                              rc;
1196
1197         rc = lu_kmem_init(osp_caches);
1198         if (rc)
1199                 return rc;
1200
1201         lprocfs_osp_init_vars(&lvars);
1202
1203         rc = class_register_type(&osp_obd_device_ops, NULL, lvars.module_vars,
1204                                  LUSTRE_OSP_NAME, &osp_device_type);
1205
1206         /* create "osc" entry in procfs for compatibility purposes */
1207         if (rc != 0) {
1208                 lu_kmem_fini(osp_caches);
1209                 return rc;
1210         }
1211
1212         lprocfs_lwp_init_vars(&lvars);
1213
1214         rc = class_register_type(&lwp_obd_device_ops, NULL, lvars.module_vars,
1215                                  LUSTRE_LWP_NAME, &lwp_device_type);
1216         if (rc != 0) {
1217                 class_unregister_type(LUSTRE_OSP_NAME);
1218                 lu_kmem_fini(osp_caches);
1219                 return rc;
1220         }
1221
1222         /* Note: add_rec/delcare_add_rec will be only used by catalogs */
1223         osp_mds_ost_orig_logops = llog_osd_ops;
1224         osp_mds_ost_orig_logops.lop_add = llog_cat_add_rec;
1225         osp_mds_ost_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1226
1227         osc_proc_dir = lprocfs_srch(proc_lustre_root, "osc");
1228         if (osc_proc_dir == NULL) {
1229                 osc_proc_dir = lprocfs_register("osc", proc_lustre_root, NULL,
1230                                                 NULL);
1231                 if (IS_ERR(osc_proc_dir))
1232                         CERROR("osp: can't create compat entry \"osc\": %d\n",
1233                                (int) PTR_ERR(osc_proc_dir));
1234         }
1235         return rc;
1236 }
1237
1238 static void __exit osp_mod_exit(void)
1239 {
1240         lprocfs_try_remove_proc_entry("osc", proc_lustre_root);
1241
1242         class_unregister_type(LUSTRE_LWP_NAME);
1243         class_unregister_type(LUSTRE_OSP_NAME);
1244         lu_kmem_fini(osp_caches);
1245 }
1246
1247 MODULE_AUTHOR("Intel, Inc. <http://www.intel.com/>");
1248 MODULE_DESCRIPTION("Lustre OST Proxy Device ("LUSTRE_OSP_NAME")");
1249 MODULE_LICENSE("GPL");
1250
1251 cfs_module(osp, LUSTRE_VERSION_STRING, osp_mod_init, osp_mod_exit);