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) 2011, 2012 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 <lustre_mdt.h>
  53 #include "mdt_internal.h"
  54 #ifdef HAVE_QUOTA_SUPPORT
  55 # include <lustre_quota.h>
  56 #endif
  57 #include <lustre_acl.h>
  58 #include <lustre_param.h>
  59 #include <lustre_fsfilt.h>
  60
  61 struct mds_device {
  62         /* super-class */
  63         struct md_device           mds_md_dev;
  64         struct ptlrpc_service     *mds_regular_service;
  65         struct ptlrpc_service     *mds_readpage_service;
  66         struct ptlrpc_service     *mds_setattr_service;
  67         struct ptlrpc_service     *mds_mdsc_service;
  68         struct ptlrpc_service     *mds_mdss_service;
  69         struct ptlrpc_service     *mds_fld_service;
  70 };
  71
  72 /*
  73  *  * Initialized in mdt_mod_init().
  74  *   */
  75 static unsigned long mdt_num_threads;
  76 CFS_MODULE_PARM(mdt_num_threads, "ul", ulong, 0444,
  77                 "number of MDS service threads to start "
  78                 "(deprecated in favor of mds_num_threads)");
  79
  80 static unsigned long mds_num_threads;
  81 CFS_MODULE_PARM(mds_num_threads, "ul", ulong, 0444,
  82                 "number of MDS service threads to start");
  83
  84 static char *mds_num_cpts;
  85 CFS_MODULE_PARM(mds_num_cpts, "c", charp, 0444,
  86                 "CPU partitions MDS threads should run on");
  87
  88 static unsigned long mds_rdpg_num_threads;
  89 CFS_MODULE_PARM(mds_rdpg_num_threads, "ul", ulong, 0444,
  90                 "number of MDS readpage service threads to start");
  91
  92 static char *mds_rdpg_num_cpts;
  93 CFS_MODULE_PARM(mds_rdpg_num_cpts, "c", charp, 0444,
  94                 "CPU partitions MDS readpage threads should run on");
  95
  96 /* NB: these two should be removed along with setattr service in the future */
  97 static unsigned long mds_attr_num_threads;
  98 CFS_MODULE_PARM(mds_attr_num_threads, "ul", ulong, 0444,
  99                 "number of MDS setattr service threads to start");
 100
 101 static char *mds_attr_num_cpts;
 102 CFS_MODULE_PARM(mds_attr_num_cpts, "c", charp, 0444,
 103                 "CPU partitions MDS setattr threads should run on");
 104
 105 #define DEFINE_RPC_HANDLER(base, flags, opc, fn, fmt)                   \
 106 [opc - base] = {                                                        \
 107         .mh_name        = #opc,                                         \
 108         .mh_fail_id     = OBD_FAIL_ ## opc ## _NET,                     \
 109         .mh_opc         = opc,                                          \
 110         .mh_flags       = flags,                                        \
 111         .mh_act         = fn,                                           \
 112         .mh_fmt         = fmt                                           \
 113 }
 114
 115 /* Request with a format known in advance */
 116 #define DEF_MDT_HDL(flags, name, fn)                                    \
 117         DEFINE_RPC_HANDLER(MDS_GETATTR, flags, name, fn, &RQF_ ## name)
 118
 119 /* Request with a format we do not yet know */
 120 #define DEF_MDT_HDL_VAR(flags, name, fn)                                \
 121         DEFINE_RPC_HANDLER(MDS_GETATTR, flags, name, fn, NULL)
 122
 123 /* Map one non-standard request format handler.  This should probably get
 124  * a common OBD_SET_INFO RPC opcode instead of this mismatch. */
 125 #define RQF_MDS_SET_INFO RQF_OBD_SET_INFO
 126
 127 static struct mdt_handler mdt_mds_ops[] = {
 128 DEF_MDT_HDL(0,                          MDS_CONNECT,      mdt_connect),
 129 DEF_MDT_HDL(0,                          MDS_DISCONNECT,   mdt_disconnect),
 130 DEF_MDT_HDL(0,                          MDS_SET_INFO,     mdt_set_info),
 131 DEF_MDT_HDL(0,                          MDS_GET_INFO,     mdt_get_info),
 132 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_GETSTATUS,    mdt_getstatus),
 133 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETATTR,      mdt_getattr),
 134 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_GETATTR_NAME, mdt_getattr_name),
 135 DEF_MDT_HDL(HABEO_CORPUS,               MDS_GETXATTR,     mdt_getxattr),
 136 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_STATFS,       mdt_statfs),
 137 DEF_MDT_HDL(0           | MUTABOR,      MDS_REINT,        mdt_reint),
 138 DEF_MDT_HDL(HABEO_CORPUS,               MDS_CLOSE,        mdt_close),
 139 DEF_MDT_HDL(HABEO_CORPUS,               MDS_DONE_WRITING, mdt_done_writing),
 140 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_PIN,          mdt_pin),
 141 DEF_MDT_HDL_VAR(0,                      MDS_SYNC,         mdt_sync),
 142 DEF_MDT_HDL(HABEO_CORPUS| HABEO_REFERO, MDS_IS_SUBDIR,    mdt_is_subdir),
 143 DEF_MDT_HDL(0,                          MDS_QUOTACHECK,   mdt_quotacheck),
 144 DEF_MDT_HDL(0,                          MDS_QUOTACTL,     mdt_quotactl),
 145 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_HSM_PROGRESS, mdt_hsm_progress),
 146 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_HSM_CT_REGISTER,
 147                                                 mdt_hsm_ct_register),
 148 DEF_MDT_HDL(0           | HABEO_REFERO, MDS_HSM_CT_UNREGISTER,
 149                                                 mdt_hsm_ct_unregister),
 150 };
 151
 152 #define DEF_OBD_HDL(flags, name, fn)                                    \
 153         DEFINE_RPC_HANDLER(OBD_PING, flags, name, fn, NULL)
 154
 155 static struct mdt_handler mdt_obd_ops[] = {
 156 DEF_OBD_HDL(0,                          OBD_PING,         mdt_obd_ping),
 157 DEF_OBD_HDL(0,                          OBD_LOG_CANCEL,   mdt_obd_log_cancel),
 158 DEF_OBD_HDL(0,                          OBD_QC_CALLBACK,  mdt_obd_qc_callback),
 159 DEF_OBD_HDL(0,                          OBD_IDX_READ,     mdt_obd_idx_read)
 160 };
 161
 162 #define DEF_DLM_HDL_VAR(flags, name, fn)                                \
 163         DEFINE_RPC_HANDLER(LDLM_ENQUEUE, flags, name, fn, NULL)
 164 #define DEF_DLM_HDL(flags, name, fn)                                    \
 165         DEFINE_RPC_HANDLER(LDLM_ENQUEUE, flags, name, fn, &RQF_ ## name)
 166
 167 static struct mdt_handler mdt_dlm_ops[] = {
 168 DEF_DLM_HDL    (HABEO_CLAVIS,           LDLM_ENQUEUE,     mdt_enqueue),
 169 DEF_DLM_HDL_VAR(HABEO_CLAVIS,           LDLM_CONVERT,     mdt_convert),
 170 DEF_DLM_HDL_VAR(0,                      LDLM_BL_CALLBACK, mdt_bl_callback),
 171 DEF_DLM_HDL_VAR(0,                      LDLM_CP_CALLBACK, mdt_cp_callback)
 172 };
 173
 174 #define DEF_LLOG_HDL(flags, name, fn)                                   \
 175         DEFINE_RPC_HANDLER(LLOG_ORIGIN_HANDLE_CREATE, flags, name, fn, NULL)
 176
 177 static struct mdt_handler mdt_llog_ops[] = {
 178 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_CREATE,        mdt_llog_create),
 179 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_NEXT_BLOCK,    mdt_llog_next_block),
 180 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_READ_HEADER,   mdt_llog_read_header),
 181 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_WRITE_REC,     NULL),
 182 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_CLOSE,         NULL),
 183 DEF_LLOG_HDL(0,         LLOG_ORIGIN_CONNECT,              NULL),
 184 DEF_LLOG_HDL(0,         LLOG_CATINFO,                     NULL),
 185 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_PREV_BLOCK,    mdt_llog_prev_block),
 186 DEF_LLOG_HDL(0,         LLOG_ORIGIN_HANDLE_DESTROY,       mdt_llog_destroy),
 187 };
 188
 189 #define DEF_SEC_HDL(flags, name, fn)                                    \
 190         DEFINE_RPC_HANDLER(SEC_CTX_INIT, flags, name, fn, NULL)
 191
 192 static struct mdt_handler mdt_sec_ctx_ops[] = {
 193 DEF_SEC_HDL(0,                          SEC_CTX_INIT,     mdt_sec_ctx_handle),
 194 DEF_SEC_HDL(0,                          SEC_CTX_INIT_CONT,mdt_sec_ctx_handle),
 195 DEF_SEC_HDL(0,                          SEC_CTX_FINI,     mdt_sec_ctx_handle)
 196 };
 197
 198 #define DEF_QUOTA_HDL(flags, name, fn)                          \
 199         DEFINE_RPC_HANDLER(QUOTA_DQACQ, flags, name, fn, &RQF_ ## name)
 200
 201 static struct mdt_handler mdt_quota_ops[] = {
 202 DEF_QUOTA_HDL(HABEO_REFERO,             QUOTA_DQACQ,      mdt_quota_dqacq),
 203 };
 204
 205 struct mdt_opc_slice mdt_regular_handlers[] = {
 206         {
 207                 .mos_opc_start  = MDS_GETATTR,
 208                 .mos_opc_end    = MDS_LAST_OPC,
 209                 .mos_hs         = mdt_mds_ops
 210         },
 211         {
 212                 .mos_opc_start  = OBD_PING,
 213                 .mos_opc_end    = OBD_LAST_OPC,
 214                 .mos_hs         = mdt_obd_ops
 215         },
 216         {
 217                 .mos_opc_start  = LDLM_ENQUEUE,
 218                 .mos_opc_end    = LDLM_LAST_OPC,
 219                 .mos_hs         = mdt_dlm_ops
 220         },
 221         {
 222                 .mos_opc_start  = LLOG_ORIGIN_HANDLE_CREATE,
 223                 .mos_opc_end    = LLOG_LAST_OPC,
 224                 .mos_hs         = mdt_llog_ops
 225         },
 226         {
 227                 .mos_opc_start  = SEC_CTX_INIT,
 228                 .mos_opc_end    = SEC_LAST_OPC,
 229                 .mos_hs         = mdt_sec_ctx_ops
 230         },
 231         {
 232                 .mos_opc_start  = QUOTA_DQACQ,
 233                 .mos_opc_end    = QUOTA_LAST_OPC,
 234                 .mos_hs         = mdt_quota_ops
 235         },
 236         {
 237                 .mos_hs         = NULL
 238         }
 239 };
 240
 241 /* Readpage/readdir handlers */
 242 static struct mdt_handler mdt_readpage_ops[] = {
 243 DEF_MDT_HDL(0,                  MDS_CONNECT,  mdt_connect),
 244 DEF_MDT_HDL(HABEO_CORPUS | HABEO_REFERO, MDS_READPAGE, mdt_readpage),
 245 /* XXX: this is ugly and should be fixed one day, see mdc_close() for
 246  * detailed comments. --umka */
 247 DEF_MDT_HDL(HABEO_CORPUS,               MDS_CLOSE,        mdt_close),
 248 DEF_MDT_HDL(HABEO_CORPUS,               MDS_DONE_WRITING, mdt_done_writing),
 249 };
 250
 251 static struct mdt_opc_slice mdt_readpage_handlers[] = {
 252         {
 253                 .mos_opc_start = MDS_GETATTR,
 254                 .mos_opc_end   = MDS_LAST_OPC,
 255                 .mos_hs = mdt_readpage_ops
 256         },
 257         {
 258                 .mos_opc_start = OBD_FIRST_OPC,
 259                 .mos_opc_end   = OBD_LAST_OPC,
 260                 .mos_hs = mdt_obd_ops
 261         },
 262         {
 263                 .mos_hs = NULL
 264         }
 265 };
 266
 267 /* Sequence service handlers */
 268 #define DEF_SEQ_HDL(flags, name, fn)                                    \
 269         DEFINE_RPC_HANDLER(SEQ_QUERY, flags, name, fn, &RQF_ ## name)
 270
 271 static struct mdt_handler mdt_seq_ops[] = {
 272 DEF_SEQ_HDL(0,                          SEQ_QUERY,        (void *)seq_query),
 273 };
 274
 275 struct mdt_opc_slice mdt_seq_handlers[] = {
 276         {
 277                 .mos_opc_start = SEQ_QUERY,
 278                 .mos_opc_end   = SEQ_LAST_OPC,
 279                 .mos_hs = mdt_seq_ops
 280         },
 281         {
 282                 .mos_hs = NULL
 283         }
 284 };
 285
 286 /* FID Location Database handlers */
 287 #define DEF_FLD_HDL(flags, name, fn)                                    \
 288         DEFINE_RPC_HANDLER(FLD_QUERY, flags, name, fn, &RQF_ ## name)
 289
 290 static struct mdt_handler mdt_fld_ops[] = {
 291 DEF_FLD_HDL(0,                          FLD_QUERY,        (void *)fld_query),
 292 };
 293
 294 struct mdt_opc_slice mdt_fld_handlers[] = {
 295         {
 296                 .mos_opc_start = FLD_QUERY,
 297                 .mos_opc_end   = FLD_LAST_OPC,
 298                 .mos_hs = mdt_fld_ops
 299         },
 300         {
 301                 .mos_hs = NULL
 302         }
 303 };
 304
 305 static int mds_regular_handle(struct ptlrpc_request *req)
 306 {
 307         return mdt_handle_common(req, mdt_regular_handlers);
 308 }
 309
 310 static int mds_readpage_handle(struct ptlrpc_request *req)
 311 {
 312         return mdt_handle_common(req, mdt_readpage_handlers);
 313 }
 314
 315 static int mds_mdsc_handle(struct ptlrpc_request *req)
 316 {
 317         return mdt_handle_common(req, mdt_seq_handlers);
 318 }
 319
 320 static int mds_mdss_handle(struct ptlrpc_request *req)
 321 {
 322         return mdt_handle_common(req, mdt_seq_handlers);
 323 }
 324
 325 static int mds_fld_handle(struct ptlrpc_request *req)
 326 {
 327         return mdt_handle_common(req, mdt_fld_handlers);
 328 }
 329
 330 /* device init/fini methods */
 331 static void mds_stop_ptlrpc_service(struct mds_device *m)
 332 {
 333         ENTRY;
 334         if (m->mds_regular_service != NULL) {
 335                 ptlrpc_unregister_service(m->mds_regular_service);
 336                 m->mds_regular_service = NULL;
 337         }
 338         if (m->mds_readpage_service != NULL) {
 339                 ptlrpc_unregister_service(m->mds_readpage_service);
 340                 m->mds_readpage_service = NULL;
 341         }
 342         if (m->mds_setattr_service != NULL) {
 343                 ptlrpc_unregister_service(m->mds_setattr_service);
 344                 m->mds_setattr_service = NULL;
 345         }
 346         if (m->mds_mdsc_service != NULL) {
 347                 ptlrpc_unregister_service(m->mds_mdsc_service);
 348                 m->mds_mdsc_service = NULL;
 349         }
 350         if (m->mds_mdss_service != NULL) {
 351                 ptlrpc_unregister_service(m->mds_mdss_service);
 352                 m->mds_mdss_service = NULL;
 353         }
 354         if (m->mds_fld_service != NULL) {
 355                 ptlrpc_unregister_service(m->mds_fld_service);
 356                 m->mds_fld_service = NULL;
 357         }
 358         EXIT;
 359 }
 360
 361 static int mds_start_ptlrpc_service(struct mds_device *m)
 362 {
 363         static struct ptlrpc_service_conf conf;
 364         struct obd_device *obd = m->mds_md_dev.md_lu_dev.ld_obd;
 365         cfs_proc_dir_entry_t *procfs_entry;
 366         int rc = 0;
 367         ENTRY;
 368
 369         procfs_entry = obd->obd_proc_entry;
 370         LASSERT(procfs_entry != NULL);
 371
 372         conf = (typeof(conf)) {
 373                 .psc_name               = LUSTRE_MDT_NAME,
 374                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 375                 .psc_buf                = {
 376                         .bc_nbufs               = MDS_NBUFS,
 377                         .bc_buf_size            = MDS_BUFSIZE,
 378                         .bc_req_max_size        = MDS_MAXREQSIZE,
 379                         .bc_rep_max_size        = MDS_MAXREPSIZE,
 380                         .bc_req_portal          = MDS_REQUEST_PORTAL,
 381                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 382                 },
 383                 /*
 384                  * We'd like to have a mechanism to set this on a per-device
 385                  * basis, but alas...
 386                  */
 387                 .psc_thr                = {
 388                         .tc_thr_name            = LUSTRE_MDT_NAME,
 389                         .tc_thr_factor          = MDS_THR_FACTOR,
 390                         .tc_nthrs_init          = MDS_NTHRS_INIT,
 391                         .tc_nthrs_base          = MDS_NTHRS_BASE,
 392                         .tc_nthrs_max           = MDS_NTHRS_MAX,
 393                         .tc_nthrs_user          = mds_num_threads,
 394                         .tc_cpu_affinity        = 1,
 395                         .tc_ctx_tags            = LCT_MD_THREAD,
 396                 },
 397                 .psc_cpt                = {
 398                         .cc_pattern             = mds_num_cpts,
 399                 },
 400                 .psc_ops                = {
 401                         .so_req_handler         = mds_regular_handle,
 402                         .so_req_printer         = target_print_req,
 403                         .so_hpreq_handler       = ptlrpc_hpreq_handler,
 404                 },
 405         };
 406         m->mds_regular_service = ptlrpc_register_service(&conf, procfs_entry);
 407         if (IS_ERR(m->mds_regular_service)) {
 408                 rc = PTR_ERR(m->mds_regular_service);
 409                 CERROR("failed to start regular mdt service: %d\n", rc);
 410                 m->mds_regular_service = NULL;
 411
 412                 RETURN(rc);
 413         }
 414
 415         /*
 416          * readpage service configuration. Parameters have to be adjusted,
 417          * ideally.
 418          */
 419         memset(&conf, 0, sizeof(conf));
 420         conf = (typeof(conf)) {
 421                 .psc_name               = LUSTRE_MDT_NAME "_readpage",
 422                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 423                 .psc_buf                = {
 424                         .bc_nbufs               = MDS_NBUFS,
 425                         .bc_buf_size            = MDS_BUFSIZE,
 426                         .bc_req_max_size        = MDS_MAXREQSIZE,
 427                         .bc_rep_max_size        = MDS_MAXREPSIZE,
 428                         .bc_req_portal          = MDS_READPAGE_PORTAL,
 429                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 430                 },
 431                 .psc_thr                = {
 432                         .tc_thr_name            = LUSTRE_MDT_NAME "_rdpg",
 433                         .tc_thr_factor          = MDS_RDPG_THR_FACTOR,
 434                         .tc_nthrs_init          = MDS_RDPG_NTHRS_INIT,
 435                         .tc_nthrs_base          = MDS_RDPG_NTHRS_BASE,
 436                         .tc_nthrs_max           = MDS_RDPG_NTHRS_MAX,
 437                         .tc_nthrs_user          = mds_rdpg_num_threads,
 438                         .tc_cpu_affinity        = 1,
 439                         .tc_ctx_tags            = LCT_MD_THREAD,
 440                 },
 441                 .psc_cpt                = {
 442                         .cc_pattern             = mds_rdpg_num_cpts,
 443                 },
 444                 .psc_ops                = {
 445                         .so_req_handler         = mds_readpage_handle,
 446                         .so_req_printer         = target_print_req,
 447                 },
 448         };
 449         m->mds_readpage_service = ptlrpc_register_service(&conf, procfs_entry);
 450         if (IS_ERR(m->mds_readpage_service)) {
 451                 rc = PTR_ERR(m->mds_readpage_service);
 452                 CERROR("failed to start readpage service: %d\n", rc);
 453                 m->mds_readpage_service = NULL;
 454
 455                 GOTO(err_mds_svc, rc);
 456         }
 457
 458         /*
 459          * setattr service configuration.
 460          *
 461          * XXX To keep the compatibility with old client(< 2.2), we need to
 462          * preserve this portal for a certain time, it should be removed
 463          * eventually. LU-617.
 464          */
 465         memset(&conf, 0, sizeof(conf));
 466         conf = (typeof(conf)) {
 467                 .psc_name               = LUSTRE_MDT_NAME "_setattr",
 468                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 469                 .psc_buf                = {
 470                         .bc_nbufs               = MDS_NBUFS,
 471                         .bc_buf_size            = MDS_BUFSIZE,
 472                         .bc_req_max_size        = MDS_MAXREQSIZE,
 473                         .bc_rep_max_size        = MDS_MAXREPSIZE,
 474                         .bc_req_portal          = MDS_SETATTR_PORTAL,
 475                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 476                 },
 477                 .psc_thr                = {
 478                         .tc_thr_name            = LUSTRE_MDT_NAME "_attr",
 479                         .tc_thr_factor          = MDS_SETA_THR_FACTOR,
 480                         .tc_nthrs_init          = MDS_SETA_NTHRS_INIT,
 481                         .tc_nthrs_base          = MDS_SETA_NTHRS_BASE,
 482                         .tc_nthrs_max           = MDS_SETA_NTHRS_MAX,
 483                         .tc_nthrs_user          = mds_attr_num_threads,
 484                         .tc_cpu_affinity        = 1,
 485                         .tc_ctx_tags            = LCT_MD_THREAD,
 486                 },
 487                 .psc_cpt                = {
 488                         .cc_pattern             = mds_attr_num_cpts,
 489                 },
 490                 .psc_ops                = {
 491                         .so_req_handler         = mds_regular_handle,
 492                         .so_req_printer         = target_print_req,
 493                         .so_hpreq_handler       = NULL,
 494                 },
 495         };
 496         m->mds_setattr_service = ptlrpc_register_service(&conf, procfs_entry);
 497         if (IS_ERR(m->mds_setattr_service)) {
 498                 rc = PTR_ERR(m->mds_setattr_service);
 499                 CERROR("failed to start setattr service: %d\n", rc);
 500                 m->mds_setattr_service = NULL;
 501
 502                 GOTO(err_mds_svc, rc);
 503         }
 504
 505         /*
 506          * sequence controller service configuration
 507          */
 508         memset(&conf, 0, sizeof(conf));
 509         conf = (typeof(conf)) {
 510                 .psc_name               = LUSTRE_MDT_NAME "_seqs",
 511                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 512                 .psc_buf                = {
 513                         .bc_nbufs               = MDS_NBUFS,
 514                         .bc_buf_size            = MDS_BUFSIZE,
 515                         .bc_req_max_size        = SEQ_MAXREQSIZE,
 516                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
 517                         .bc_req_portal          = SEQ_CONTROLLER_PORTAL,
 518                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 519                 },
 520                 .psc_thr                = {
 521                         .tc_thr_name            = LUSTRE_MDT_NAME "_seqs",
 522                         .tc_nthrs_init          = MDS_OTHR_NTHRS_INIT,
 523                         .tc_nthrs_max           = MDS_OTHR_NTHRS_MAX,
 524                         .tc_ctx_tags            = LCT_MD_THREAD,
 525                 },
 526                 .psc_ops                = {
 527                         .so_req_handler         = mds_mdsc_handle,
 528                         .so_req_printer         = target_print_req,
 529                         .so_hpreq_handler       = NULL,
 530                 },
 531         };
 532         m->mds_mdsc_service = ptlrpc_register_service(&conf, procfs_entry);
 533         if (IS_ERR(m->mds_mdsc_service)) {
 534                 rc = PTR_ERR(m->mds_mdsc_service);
 535                 CERROR("failed to start seq controller service: %d\n", rc);
 536                 m->mds_mdsc_service = NULL;
 537
 538                 GOTO(err_mds_svc, rc);
 539         }
 540
 541         /*
 542          * metadata sequence server service configuration
 543          */
 544         memset(&conf, 0, sizeof(conf));
 545         conf = (typeof(conf)) {
 546                 .psc_name               = LUSTRE_MDT_NAME "_seqm",
 547                 .psc_watchdog_factor    = MDT_SERVICE_WATCHDOG_FACTOR,
 548                 .psc_buf                = {
 549                         .bc_nbufs               = MDS_NBUFS,
 550                         .bc_buf_size            = MDS_BUFSIZE,
 551                         .bc_req_max_size        = SEQ_MAXREQSIZE,
 552                         .bc_rep_max_size        = SEQ_MAXREPSIZE,
 553                         .bc_req_portal          = SEQ_METADATA_PORTAL,
 554                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 555                 },
 556                 .psc_thr                = {
 557                         .tc_thr_name            = LUSTRE_MDT_NAME "_seqm",
 558                         .tc_nthrs_init          = MDS_OTHR_NTHRS_INIT,
 559                         .tc_nthrs_max           = MDS_OTHR_NTHRS_MAX,
 560                         .tc_ctx_tags            = LCT_MD_THREAD | LCT_DT_THREAD
 561                 },
 562                 .psc_ops                = {
 563                         .so_req_handler         = mds_mdss_handle,
 564                         .so_req_printer         = target_print_req,
 565                         .so_hpreq_handler       = NULL,
 566                 },
 567         };
 568         m->mds_mdss_service = ptlrpc_register_service(&conf, procfs_entry);
 569         if (IS_ERR(m->mds_mdss_service)) {
 570                 rc = PTR_ERR(m->mds_mdss_service);
 571                 CERROR("failed to start metadata seq server service: %d\n", rc);
 572                 m->mds_mdss_service = NULL;
 573
 574                 GOTO(err_mds_svc, rc);
 575         }
 576
 577         /* FLD service start */
 578         memset(&conf, 0, sizeof(conf));
 579         conf = (typeof(conf)) {
 580                 .psc_name            = LUSTRE_MDT_NAME "_fld",
 581                 .psc_watchdog_factor = MDT_SERVICE_WATCHDOG_FACTOR,
 582                 .psc_buf                = {
 583                         .bc_nbufs               = MDS_NBUFS,
 584                         .bc_buf_size            = MDS_BUFSIZE,
 585                         .bc_req_max_size        = FLD_MAXREQSIZE,
 586                         .bc_rep_max_size        = FLD_MAXREPSIZE,
 587                         .bc_req_portal          = FLD_REQUEST_PORTAL,
 588                         .bc_rep_portal          = MDC_REPLY_PORTAL,
 589                 },
 590                 .psc_thr                = {
 591                         .tc_thr_name            = LUSTRE_MDT_NAME "_fld",
 592                         .tc_nthrs_init          = MDS_OTHR_NTHRS_INIT,
 593                         .tc_nthrs_max           = MDS_OTHR_NTHRS_MAX,
 594                         .tc_ctx_tags            = LCT_DT_THREAD | LCT_MD_THREAD
 595                 },
 596                 .psc_ops                = {
 597                         .so_req_handler         = mds_fld_handle,
 598                         .so_req_printer         = target_print_req,
 599                         .so_hpreq_handler       = NULL,
 600                 },
 601         };
 602         m->mds_fld_service = ptlrpc_register_service(&conf, procfs_entry);
 603         if (IS_ERR(m->mds_fld_service)) {
 604                 rc = PTR_ERR(m->mds_fld_service);
 605                 CERROR("failed to start fld service: %d\n", rc);
 606                 m->mds_fld_service = NULL;
 607
 608                 GOTO(err_mds_svc, rc);
 609         }
 610
 611         EXIT;
 612 err_mds_svc:
 613         if (rc)
 614                 mds_stop_ptlrpc_service(m);
 615
 616         return rc;
 617 }
 618
 619 static inline struct mds_device *mds_dev(struct lu_device *d)
 620 {
 621         return container_of0(d, struct mds_device, mds_md_dev.md_lu_dev);
 622 }
 623
 624 static struct lu_device *mds_device_fini(const struct lu_env *env,
 625                                          struct lu_device *d)
 626 {
 627         struct mds_device *m = mds_dev(d);
 628         struct obd_device *obd = d->ld_obd;
 629         ENTRY;
 630
 631         mds_stop_ptlrpc_service(m);
 632         lprocfs_obd_cleanup(obd);
 633         RETURN(NULL);
 634 }
 635
 636 static struct lu_device *mds_device_free(const struct lu_env *env,
 637                                          struct lu_device *d)
 638 {
 639         struct mds_device *m = mds_dev(d);
 640         ENTRY;
 641
 642         md_device_fini(&m->mds_md_dev);
 643         OBD_FREE_PTR(m);
 644         RETURN(NULL);
 645 }
 646
 647 static struct lu_device *mds_device_alloc(const struct lu_env *env,
 648                                           struct lu_device_type *t,
 649                                           struct lustre_cfg *cfg)
 650 {
 651         struct mds_device        *m;
 652         struct obd_device        *obd;
 653         struct lu_device          *l;
 654         int rc;
 655
 656         OBD_ALLOC_PTR(m);
 657         if (m == NULL)
 658                 return ERR_PTR(-ENOMEM);
 659
 660         md_device_init(&m->mds_md_dev, t);
 661         l = &m->mds_md_dev.md_lu_dev;
 662
 663         obd = class_name2obd(lustre_cfg_string(cfg, 0));
 664         LASSERT(obd != NULL);
 665
 666         l->ld_obd = obd;
 667         /* set this lu_device to obd, because error handling need it */
 668         obd->obd_lu_dev = l;
 669
 670         rc = lprocfs_obd_setup(obd, lprocfs_mds_obd_vars);
 671         if (rc != 0) {
 672                 mds_device_free(env, l);
 673                 l = ERR_PTR(rc);
 674                 return l;
 675         }
 676
 677         rc = mds_start_ptlrpc_service(m);
 678
 679         if (rc != 0) {
 680                 mds_device_free(env, l);
 681                 l = ERR_PTR(rc);
 682                 return l;
 683         }
 684
 685         return l;
 686 }
 687
 688 /* type constructor/destructor: mdt_type_init, mdt_type_fini */
 689 LU_TYPE_INIT_FINI(mds, &mdt_thread_key);
 690
 691 static struct lu_device_type_operations mds_device_type_ops = {
 692         .ldto_init = mds_type_init,
 693         .ldto_fini = mds_type_fini,
 694
 695         .ldto_start = mds_type_start,
 696         .ldto_stop  = mds_type_stop,
 697
 698         .ldto_device_alloc = mds_device_alloc,
 699         .ldto_device_free  = mds_device_free,
 700         .ldto_device_fini  = mds_device_fini
 701 };
 702
 703 static struct lu_device_type mds_device_type = {
 704         .ldt_tags     = LU_DEVICE_MD,
 705         .ldt_name     = LUSTRE_MDS_NAME,
 706         .ldt_ops      = &mds_device_type_ops,
 707         .ldt_ctx_tags = LCT_MD_THREAD
 708 };
 709
 710 static struct obd_ops mds_obd_device_ops = {
 711         .o_owner           = THIS_MODULE,
 712 };
 713
 714 int mds_mod_init(void)
 715 {
 716         int rc;
 717
 718         if (mdt_num_threads != 0 && mds_num_threads == 0) {
 719                 LCONSOLE_INFO("mdt_num_threads module parameter is deprecated, "
 720                               "use mds_num_threads instead or unset both for "
 721                               "dynamic thread startup\n");
 722                 mds_num_threads = mdt_num_threads;
 723         }
 724
 725         rc = class_register_type(&mds_obd_device_ops, NULL,
 726                                  lprocfs_mds_module_vars, LUSTRE_MDS_NAME,
 727                                  &mds_device_type);
 728         return rc;
 729 }
 730
 731 void mds_mod_exit(void)
 732 {
 733         class_unregister_type(LUSTRE_MDS_NAME);
 734 }