lustre/mdt/mdt_mds.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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License version 2 for more details.  A copy is
  14  * included in the COPYING file that accompanied this code.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2013, 2015, Intel Corporation.
  27  */
  28 /*
  29  * This file is part of Lustre, http://www.lustre.org/
  30  *
  31  * lustre/mdt/mdt_mds.c
  32  *
  33  * Lustre Metadata Service Layer
  34  *
  35  * Author: Di Wang <di.wang@whamcloud.com>
  36  **/
  37
  38 #define DEBUG_SUBSYSTEM S_MDS
  39
  40 #include <linux/module.h>
  41
  42 #include <obd_support.h>
  43 /* struct ptlrpc_request */
  44 #include <lustre_net.h>
  45 /* struct obd_export */
  46 #include <lustre_export.h>
  47 /* struct obd_device */
  48 #include <obd.h>
  49 /* lu2dt_dev() */
  50 #include <dt_object.h>
  51 #include <lustre_mds.h>
  52 #include "mdt_internal.h"
  53 #include <lustre_quota.h>
  54 #include <lustre_acl.h>
  55 #include <uapi/linux/lustre/lustre_param.h>
  56
  57 struct mds_device {
  58         /* super-class */
  59         struct md_device         mds_md_dev;
  60         struct ptlrpc_service   *mds_regular_service;
  61         struct ptlrpc_service   *mds_readpage_service;
  62         struct ptlrpc_service   *mds_out_service;
  63         struct ptlrpc_service   *mds_setattr_service;
  64         struct ptlrpc_service   *mds_mdsc_service;
  65         struct ptlrpc_service   *mds_mdss_service;
  66         struct ptlrpc_service   *mds_fld_service;
  67         struct mutex             mds_health_mutex;
  68 };
  69
  70 /*
  71  *  * Initialized in mds_mod_init().
  72  *   */
  73 static unsigned long mds_num_threads;
  74 module_param(mds_num_threads, ulong, 0444);
  75 MODULE_PARM_DESC(mds_num_threads, "number of MDS service threads to start");
  76
  77 static char *mds_num_cpts;
  78 module_param(mds_num_cpts, charp, 0444);
  79 MODULE_PARM_DESC(mds_num_cpts, "CPU partitions MDS threads should run on");
  80
  81 static unsigned long mds_rdpg_num_threads;
  82 module_param(mds_rdpg_num_threads, ulong, 0444);
  83 MODULE_PARM_DESC(mds_rdpg_num_threads,
  84                  "number of MDS readpage service threads to start");
  85
  86 static char *mds_rdpg_num_cpts;
  87 module_param(mds_rdpg_num_cpts, charp, 0444);
  88 MODULE_PARM_DESC(mds_rdpg_num_cpts,
  89                  "CPU partitions MDS readpage threads should run on");
  90
  91 /* NB: these two should be removed along with setattr service in the future */
  92 static unsigned long mds_attr_num_threads;
  93 module_param(mds_attr_num_threads, ulong, 0444);
  94 MODULE_PARM_DESC(mds_attr_num_threads,
  95                  "number of MDS setattr service threads to start");
  96
  97 static char *mds_attr_num_cpts;
  98 module_param(mds_attr_num_cpts, charp, 0444);
  99 MODULE_PARM_DESC(mds_attr_num_cpts,
 100                  "CPU partitions MDS setattr threads should run on");
 101
 102 /* device init/fini methods */
 103 static void mds_stop_ptlrpc_service(struct mds_device *m)
 104 {
 105         ENTRY;
 106
 107         mutex_lock(&m->mds_health_mutex);
 108         if (m->mds_regular_service != NULL) {
 109                 ptlrpc_unregister_service(m->mds_regular_service);
 110                 m->mds_regular_service = NULL;
 111         }
 112         if (m->mds_readpage_service != NULL) {
 113                 ptlrpc_unregister_service(m->mds_readpage_service);
 114                 m->mds_readpage_service = NULL;
 115         }
 116         if (m->mds_out_service != NULL) {
 117                 ptlrpc_unregister_service(m->mds_out_service);
 118                 m->mds_out_service = NULL;
 119         }
 120         if (m->mds_setattr_service != NULL) {
 121                 ptlrpc_unregister_service(m->mds_setattr_service);
 122                 m->mds_setattr_service = NULL;
 123         }
 124         if (m->mds_mdsc_service != NULL) {
 125                 ptlrpc_unregister_service(m->mds_mdsc_service);
 126                 m->mds_mdsc_service = NULL;
 127         }
 128         if (m->mds_mdss_service != NULL) {
 129                 ptlrpc_unregister_service(m->mds_mdss_service);
 130                 m->mds_mdss_service = NULL;
 131         }
 132         if (m->mds_fld_service != NULL) {
 133                 ptlrpc_unregister_service(m->mds_fld_service);
 134                 m->mds_fld_service = NULL;
 135         }
 136         mutex_unlock(&m->mds_health_mutex);
 137
 138         EXIT;
 139 }
 140
 141 static int mds_start_ptlrpc_service(struct mds_device *m)
 142 {
 143         static struct ptlrpc_service_conf conf;
 144         struct obd_device *obd = m->mds_md_dev.md_lu_dev.ld_obd;
 145         struct proc_dir_entry *procfs_entry;
 146         int rc = 0;
 147         ENTRY;
 148
 149         procfs_entry = obd->obd_proc_entry;
 150         LASSERT(procfs_entry != NULL);
 151
 152         conf = (typeof(conf)) {
 153                 .psc_name               = LUSTRE_MDT_NAME,
 154                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 155                 .psc_buf                = {
 156                         .bc_nbufs               = MDS_NBUFS,
 157                         .bc_buf_size            = MDS_REG_BUFSIZE,
 158                         .bc_req_max_size        = MDS_REG_MAXREQSIZE,
 159                         .bc_rep_max_size        = MDS_REG_MAXREPSIZE,
 160                         .bc_req_portal          = MDS_REQUEST_PORTAL,
 161                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 162                 },
 163                 /*
 164                  * We'd like to have a mechanism to set this on a per-device
 165                  * basis, but alas...
 166                  */
 167                 .psc_thr                = {
 168                         .tc_thr_name            = LUSTRE_MDT_NAME,
 169                         .tc_thr_factor          = MDS_THR_FACTOR,
 170                         .tc_nthrs_init          = MDS_NTHRS_INIT,
 171                         .tc_nthrs_base          = MDS_NTHRS_BASE,
 172                         .tc_nthrs_max           = MDS_NTHRS_MAX,
 173                         .tc_nthrs_user          = mds_num_threads,
 174                         .tc_cpu_affinity        = 1,
 175                         .tc_ctx_tags            = LCT_MD_THREAD,
 176                 },
 177                 .psc_cpt                = {
 178                         .cc_pattern             = mds_num_cpts,
 179                 },
 180                 .psc_ops                = {
 181                         .so_req_handler         = tgt_request_handle,
 182                         .so_req_printer         = target_print_req,
 183                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
 184                 },
 185         };
 186         m->mds_regular_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 187                                                          procfs_entry);
 188         if (IS_ERR(m->mds_regular_service)) {
 189                 rc = PTR_ERR(m->mds_regular_service);
 190                 CERROR("failed to start regular mdt service: %d\n", rc);
 191                 m->mds_regular_service = NULL;
 192
 193                 RETURN(rc);
 194         }
 195
 196         /*
 197          * readpage service configuration. Parameters have to be adjusted,
 198          * ideally.
 199          */
 200         memset(&conf, 0, sizeof(conf));
 201         conf = (typeof(conf)) {
 202                 .psc_name               = LUSTRE_MDT_NAME "_readpage",
 203                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 204                 .psc_buf                = {
 205                         .bc_nbufs               = MDS_NBUFS,
 206                         .bc_buf_size            = MDS_BUFSIZE,
 207                         .bc_req_max_size        = MDS_MAXREQSIZE,
 208                         .bc_rep_max_size        = MDS_MAXREPSIZE,
 209                         .bc_req_portal          = MDS_READPAGE_PORTAL,
 210                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 211                 },
 212                 .psc_thr                = {
 213                         .tc_thr_name            = LUSTRE_MDT_NAME "_rdpg",
 214                         .tc_thr_factor          = MDS_RDPG_THR_FACTOR,
 215                         .tc_nthrs_init          = MDS_RDPG_NTHRS_INIT,
 216                         .tc_nthrs_base          = MDS_RDPG_NTHRS_BASE,
 217                         .tc_nthrs_max           = MDS_RDPG_NTHRS_MAX,
 218                         .tc_nthrs_user          = mds_rdpg_num_threads,
 219                         .tc_cpu_affinity        = 1,
 220                         .tc_ctx_tags            = LCT_MD_THREAD,
 221                 },
 222                 .psc_cpt                = {
 223                         .cc_pattern             = mds_rdpg_num_cpts,
 224                 },
 225                 .psc_ops                = {
 226                         .so_req_handler         = tgt_request_handle,
 227                         .so_req_printer         = target_print_req,
 228                 },
 229         };
 230         m->mds_readpage_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 231                                                           procfs_entry);
 232         if (IS_ERR(m->mds_readpage_service)) {
 233                 rc = PTR_ERR(m->mds_readpage_service);
 234                 CERROR("failed to start readpage service: %d\n", rc);
 235                 m->mds_readpage_service = NULL;
 236
 237                 GOTO(err_mds_svc, rc);
 238         }
 239
 240         /*
 241          * setattr service configuration.
 242          *
 243          * XXX To keep the compatibility with old client(< 2.2), we need to
 244          * preserve this portal for a certain time, it should be removed
 245          * eventually. LU-617.
 246          */
 247         memset(&conf, 0, sizeof(conf));
 248         conf = (typeof(conf)) {
 249                 .psc_name               = LUSTRE_MDT_NAME "_setattr",
 250                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 251                 .psc_buf                = {
 252                         .bc_nbufs               = MDS_NBUFS,
 253                         .bc_buf_size            = MDS_BUFSIZE,
 254                         .bc_req_max_size        = MDS_MAXREQSIZE,
 255                         .bc_rep_max_size        = MDS_LOV_MAXREPSIZE,
 256                         .bc_req_portal          = MDS_SETATTR_PORTAL,
 257                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 258                 },
 259                 .psc_thr                = {
 260                         .tc_thr_name            = LUSTRE_MDT_NAME "_attr",
 261                         .tc_thr_factor          = MDS_SETA_THR_FACTOR,
 262                         .tc_nthrs_init          = MDS_SETA_NTHRS_INIT,
 263                         .tc_nthrs_base          = MDS_SETA_NTHRS_BASE,
 264                         .tc_nthrs_max           = MDS_SETA_NTHRS_MAX,
 265                         .tc_nthrs_user          = mds_attr_num_threads,
 266                         .tc_cpu_affinity        = 1,
 267                         .tc_ctx_tags            = LCT_MD_THREAD,
 268                 },
 269                 .psc_cpt                = {
 270                         .cc_pattern             = mds_attr_num_cpts,
 271                 },
 272                 .psc_ops                = {
 273                         .so_req_handler         = tgt_request_handle,
 274                         .so_req_printer         = target_print_req,
 275                         .so_hpreq_handler       = NULL,
 276                 },
 277         };
 278         m->mds_setattr_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 279                                                          procfs_entry);
 280         if (IS_ERR(m->mds_setattr_service)) {
 281                 rc = PTR_ERR(m->mds_setattr_service);
 282                 CERROR("failed to start setattr service: %d\n", rc);
 283                 m->mds_setattr_service = NULL;
 284
 285                 GOTO(err_mds_svc, rc);
 286         }
 287
 288         /* Object update service */
 289         conf = (typeof(conf)) {
 290                 .psc_name               = LUSTRE_MDT_NAME "_out",
 291                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 292                 .psc_buf                = {
 293                         .bc_nbufs               = MDS_NBUFS,
 294                         .bc_buf_size            = OUT_BUFSIZE,
 295                         .bc_req_max_size        = OUT_MAXREQSIZE,
 296                         .bc_rep_max_size        = OUT_MAXREPSIZE,
 297                         .bc_req_portal          = OUT_PORTAL,
 298                         .bc_rep_portal          = OSC_REPLY_PORTAL,
 299                 },
 300                 /*
 301                  * We'd like to have a mechanism to set this on a per-device
 302                  * basis, but alas...
 303                  */
 304                 .psc_thr                = {
 305                         .tc_thr_name            = LUSTRE_MDT_NAME "_out",
 306                         .tc_thr_factor          = MDS_THR_FACTOR,
 307                         .tc_nthrs_init          = MDS_NTHRS_INIT,
 308                         .tc_nthrs_base          = MDS_NTHRS_BASE,
 309                         .tc_nthrs_max           = MDS_NTHRS_MAX,
 310                         .tc_nthrs_user          = mds_num_threads,
 311                         .tc_cpu_affinity        = 1,
 312                         .tc_ctx_tags            = LCT_MD_THREAD |
 313                                                   LCT_DT_THREAD,
 314                 },
 315                 .psc_cpt                = {
 316                         .cc_pattern             = mds_num_cpts,
 317                 },
 318                 .psc_ops                = {
 319                         .so_req_handler         = tgt_request_handle,
 320                         .so_req_printer         = target_print_req,
 321                         .so_hpreq_handler       = NULL,
 322                 },
 323         };
 324         m->mds_out_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 325                                                      procfs_entry);
 326         if (IS_ERR(m->mds_out_service)) {
 327                 rc = PTR_ERR(m->mds_out_service);
 328                 CERROR("failed to start out service: %d\n", rc);
 329                 m->mds_out_service = NULL;
 330                 GOTO(err_mds_svc, rc);
 331         }
 332
 333         /*
 334          * sequence controller service configuration
 335          */
 336         memset(&conf, 0, sizeof(conf));
 337         conf = (typeof(conf)) {
 338                 .psc_name               = LUSTRE_MDT_NAME "_seqs",
 339                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 340                 .psc_buf                = {
 341                         .bc_nbufs               = MDS_NBUFS,
 342                         .bc_buf_size            = SEQ_BUFSIZE,
 343                         .bc_req_max_size        = SEQ_MAXREQSIZE,
 344                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
 345                         .bc_req_portal          = SEQ_CONTROLLER_PORTAL,
 346                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 347                 },
 348                 .psc_thr                = {
 349                         .tc_thr_name            = LUSTRE_MDT_NAME "_seqs",
 350                         .tc_nthrs_init          = MDS_OTHR_NTHRS_INIT,
 351                         .tc_nthrs_max           = MDS_OTHR_NTHRS_MAX,
 352                         .tc_ctx_tags            = LCT_MD_THREAD,
 353                 },
 354                 .psc_ops                = {
 355                         .so_req_handler         = tgt_request_handle,
 356                         .so_req_printer         = target_print_req,
 357                         .so_hpreq_handler       = NULL,
 358                 },
 359         };
 360         m->mds_mdsc_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 361                                                       procfs_entry);
 362         if (IS_ERR(m->mds_mdsc_service)) {
 363                 rc = PTR_ERR(m->mds_mdsc_service);
 364                 CERROR("failed to start seq controller service: %d\n", rc);
 365                 m->mds_mdsc_service = NULL;
 366
 367                 GOTO(err_mds_svc, rc);
 368         }
 369
 370         /*
 371          * metadata sequence server service configuration
 372          */
 373         memset(&conf, 0, sizeof(conf));
 374         conf = (typeof(conf)) {
 375                 .psc_name               = LUSTRE_MDT_NAME "_seqm",
 376                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 377                 .psc_buf                = {
 378                         .bc_nbufs               = MDS_NBUFS,
 379                         .bc_buf_size            = SEQ_BUFSIZE,
 380                         .bc_req_max_size        = SEQ_MAXREQSIZE,
 381                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
 382                         .bc_req_portal          = SEQ_METADATA_PORTAL,
 383                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 384                 },
 385                 .psc_thr                = {
 386                         .tc_thr_name            = LUSTRE_MDT_NAME "_seqm",
 387                         .tc_nthrs_init          = MDS_OTHR_NTHRS_INIT,
 388                         .tc_nthrs_max           = MDS_OTHR_NTHRS_MAX,
 389                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
 390                 },
 391                 .psc_ops                = {
 392                         .so_req_handler         = tgt_request_handle,
 393                         .so_req_printer         = target_print_req,
 394                         .so_hpreq_handler       = NULL,
 395                 },
 396         };
 397         m->mds_mdss_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 398                                                       procfs_entry);
 399         if (IS_ERR(m->mds_mdss_service)) {
 400                 rc = PTR_ERR(m->mds_mdss_service);
 401                 CERROR("failed to start metadata seq server service: %d\n", rc);
 402                 m->mds_mdss_service = NULL;
 403
 404                 GOTO(err_mds_svc, rc);
 405         }
 406
 407         /* FLD service start */
 408         memset(&conf, 0, sizeof(conf));
 409         conf = (typeof(conf)) {
 410                 .psc_name            = LUSTRE_MDT_NAME "_fld",
 411                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
 412                 .psc_buf                = {
 413                         .bc_nbufs               = MDS_NBUFS,
 414                         .bc_buf_size            = FLD_BUFSIZE,
 415                         .bc_req_max_size        = FLD_MAXREQSIZE,
 416                         .bc_rep_max_size        = FLD_MAXREPSIZE,
 417                         .bc_req_portal          = FLD_REQUEST_PORTAL,
 418                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 419                 },
 420                 .psc_thr                = {
 421                         .tc_thr_name            = LUSTRE_MDT_NAME "_fld",
 422                         .tc_nthrs_init          = MDS_OTHR_NTHRS_INIT,
 423                         .tc_nthrs_max           = MDS_OTHR_NTHRS_MAX,
 424                         .tc_ctx_tags            = LCT_DT_THREAD | LCT_MD_THREAD,
 425                 },
 426                 .psc_ops                = {
 427                         .so_req_handler         = tgt_request_handle,
 428                         .so_req_printer         = target_print_req,
 429                         .so_hpreq_handler       = NULL,
 430                 },
 431         };
 432         m->mds_fld_service = ptlrpc_register_service(&conf, &obd->obd_kset,
 433                                                      procfs_entry);
 434         if (IS_ERR(m->mds_fld_service)) {
 435                 rc = PTR_ERR(m->mds_fld_service);
 436                 CERROR("failed to start fld service: %d\n", rc);
 437                 m->mds_fld_service = NULL;
 438
 439                 GOTO(err_mds_svc, rc);
 440         }
 441
 442         EXIT;
 443 err_mds_svc:
 444         if (rc)
 445                 mds_stop_ptlrpc_service(m);
 446
 447         return rc;
 448 }
 449
 450 static inline struct mds_device *mds_dev(struct lu_device *d)
 451 {
 452         return container_of0(d, struct mds_device, mds_md_dev.md_lu_dev);
 453 }
 454
 455 static struct lu_device *mds_device_fini(const struct lu_env *env,
 456                                          struct lu_device *d)
 457 {
 458         struct mds_device *m = mds_dev(d);
 459         struct obd_device *obd = d->ld_obd;
 460         ENTRY;
 461
 462         mds_stop_ptlrpc_service(m);
 463         lprocfs_obd_cleanup(obd);
 464         RETURN(NULL);
 465 }
 466
 467 static struct lu_device *mds_device_free(const struct lu_env *env,
 468                                          struct lu_device *d)
 469 {
 470         struct mds_device *m = mds_dev(d);
 471         ENTRY;
 472
 473         md_device_fini(&m->mds_md_dev);
 474         OBD_FREE_PTR(m);
 475         RETURN(NULL);
 476 }
 477
 478 static struct lu_device *mds_device_alloc(const struct lu_env *env,
 479                                           struct lu_device_type *t,
 480                                           struct lustre_cfg *cfg)
 481 {
 482         struct mds_device        *m;
 483         struct obd_device        *obd;
 484         struct lu_device          *l;
 485         int rc;
 486
 487         OBD_ALLOC_PTR(m);
 488         if (m == NULL)
 489                 return ERR_PTR(-ENOMEM);
 490
 491         md_device_init(&m->mds_md_dev, t);
 492         l = &m->mds_md_dev.md_lu_dev;
 493
 494         obd = class_name2obd(lustre_cfg_string(cfg, 0));
 495         LASSERT(obd != NULL);
 496
 497         l->ld_obd = obd;
 498         /* set this lu_device to obd, because error handling need it */
 499         obd->obd_lu_dev = l;
 500
 501         rc = lprocfs_obd_setup(obd, true);
 502         if (rc != 0) {
 503                 mds_device_free(env, l);
 504                 l = ERR_PTR(rc);
 505                 return l;
 506         }
 507
 508         mutex_init(&m->mds_health_mutex);
 509
 510         rc = mds_start_ptlrpc_service(m);
 511         if (rc != 0) {
 512                 lprocfs_obd_cleanup(obd);
 513                 mds_device_free(env, l);
 514                 l = ERR_PTR(rc);
 515                 return l;
 516         }
 517         return l;
 518 }
 519
 520 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
 521 LU_TYPE_INIT_FINI(mds, &mdt_thread_key);
 522
 523 static struct lu_device_type_operations mds_device_type_ops = {
 524         .ldto_init = mds_type_init,
 525         .ldto_fini = mds_type_fini,
 526
 527         .ldto_start = mds_type_start,
 528         .ldto_stop  = mds_type_stop,
 529
 530         .ldto_device_alloc = mds_device_alloc,
 531         .ldto_device_free  = mds_device_free,
 532         .ldto_device_fini  = mds_device_fini
 533 };
 534
 535 static struct lu_device_type mds_device_type = {
 536         .ldt_tags     = LU_DEVICE_MD,
 537         .ldt_name     = LUSTRE_MDS_NAME,
 538         .ldt_ops      = &mds_device_type_ops,
 539         .ldt_ctx_tags = LCT_MD_THREAD
 540 };
 541
 542 static int mds_health_check(const struct lu_env *env, struct obd_device *obd)
 543 {
 544         struct mds_device *mds = mds_dev(obd->obd_lu_dev);
 545         int rc = 0;
 546
 547
 548         mutex_lock(&mds->mds_health_mutex);
 549         rc |= ptlrpc_service_health_check(mds->mds_regular_service);
 550         rc |= ptlrpc_service_health_check(mds->mds_readpage_service);
 551         rc |= ptlrpc_service_health_check(mds->mds_out_service);
 552         rc |= ptlrpc_service_health_check(mds->mds_setattr_service);
 553         rc |= ptlrpc_service_health_check(mds->mds_mdsc_service);
 554         rc |= ptlrpc_service_health_check(mds->mds_mdss_service);
 555         rc |= ptlrpc_service_health_check(mds->mds_fld_service);
 556         mutex_unlock(&mds->mds_health_mutex);
 557
 558         return rc != 0 ? 1 : 0;
 559 }
 560
 561 static struct obd_ops mds_obd_device_ops = {
 562         .o_owner           = THIS_MODULE,
 563         .o_health_check    = mds_health_check,
 564 };
 565
 566 int mds_mod_init(void)
 567 {
 568         return class_register_type(&mds_obd_device_ops, NULL, true, NULL,
 569                                    LUSTRE_MDS_NAME, &mds_device_type);
 570 }
 571
 572 void mds_mod_exit(void)
 573 {
 574         class_unregister_type(LUSTRE_MDS_NAME);
 575 }