4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.
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).
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
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
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2010, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/mgs/mgs_handler.c
38 * Author: Nathan Rutman <nathan@clusterfs.com>
39 * Author: Alex Zhuravlev <bzzz@whamcloud.com>
40 * Author: Mikhail Pershin <tappro@whamcloud.com>
43 #define DEBUG_SUBSYSTEM S_MGS
44 #define D_MGS D_CONFIG
46 #include <obd_class.h>
47 #include <lprocfs_status.h>
48 #include <lustre_ioctl.h>
49 #include <lustre_param.h>
51 #include "mgs_internal.h"
54 * Regular MGS handlers
56 static int mgs_connect(struct tgt_session_info *tsi)
58 struct ptlrpc_request *req = tgt_ses_req(tsi);
63 CFS_FAIL_TIMEOUT(OBD_FAIL_MGS_CONNECT_NET, cfs_fail_val);
64 rc = tgt_connect(tsi);
68 if (lustre_msg_get_conn_cnt(req->rq_reqmsg) > 1)
69 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
74 static int mgs_disconnect(struct tgt_session_info *tsi)
80 LASSERT(tsi->tsi_exp);
82 rc = tgt_disconnect(tsi);
84 RETURN(err_serious(rc));
88 static int mgs_exception(struct tgt_session_info *tsi)
92 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_EXCEPTION);
97 static inline bool str_starts_with(const char *str, const char *prefix)
99 return strncmp(str, prefix, strlen(prefix)) == 0;
102 static int mgs_set_info(struct tgt_session_info *tsi)
104 struct mgs_thread_info *mgi;
105 struct mgs_send_param *msp, *rep_msp;
106 struct lustre_cfg *lcfg;
113 mgi = mgs_env_info(tsi->tsi_env);
115 RETURN(err_serious(PTR_ERR(mgi)));
117 msp = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
119 RETURN(err_serious(-EFAULT));
121 param_len = strnlen(msp->mgs_param, sizeof(msp->mgs_param));
122 if (param_len == 0 || param_len == sizeof(msp->mgs_param))
125 /* We only allow '*.lov.stripe{size,count,offset}=*' from an RPC. */
126 s = strchr(msp->mgs_param, '.');
130 if (!str_starts_with(s + 1, "lov.stripesize=") &&
131 !str_starts_with(s + 1, "lov.stripecount=") &&
132 !str_starts_with(s + 1, "lov.stripeoffset="))
135 /* Construct lustre_cfg structure to pass to function mgs_setparam */
136 lustre_cfg_bufs_reset(&mgi->mgi_bufs, NULL);
137 lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 1, msp->mgs_param);
138 lcfg = lustre_cfg_new(LCFG_PARAM, &mgi->mgi_bufs);
142 rc = mgs_setparam(tsi->tsi_env, exp2mgs_dev(tsi->tsi_exp), lcfg,
145 LCONSOLE_WARN("%s: Unable to set parameter %s for %s: %d\n",
146 tgt_name(tsi->tsi_tgt), msp->mgs_param,
147 mgi->mgi_fsname, rc);
151 /* send back the whole msp in the reply */
152 rep_msp = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
156 lustre_cfg_free(lcfg);
166 static int mgs_completion_ast_generic(struct ldlm_lock *lock, __u64 flags,
167 void *cbdata, enum ast_type type)
171 if (!(flags & LDLM_FL_BLOCKED_MASK)) {
174 /* l_ast_data is used as a marker to avoid cancel ldlm lock
175 * twice. See LU-2317. */
176 lock_res_and_lock(lock);
177 fsdb = (struct fs_db *)lock->l_ast_data;
178 lock->l_ast_data = NULL;
179 unlock_res_and_lock(lock);
182 struct lustre_handle lockh;
186 /* clear the bit before lock put */
187 clear_bit(FSDB_REVOKING_LOCK,
191 clear_bit(FSDB_REVOKING_PARAMS,
195 mgs_ir_notify_complete(fsdb);
201 ldlm_lock2handle(lock, &lockh);
202 ldlm_lock_decref_and_cancel(&lockh, LCK_EX);
206 RETURN(ldlm_completion_ast(lock, flags, cbdata));
209 static int mgs_completion_ast_config(struct ldlm_lock *lock, __u64 flags,
212 return mgs_completion_ast_generic(lock, flags, cbdata, AST_CONFIG);
215 static int mgs_completion_ast_params(struct ldlm_lock *lock, __u64 flags,
218 return mgs_completion_ast_generic(lock, flags, cbdata, AST_PARAMS);
221 static int mgs_completion_ast_ir(struct ldlm_lock *lock, __u64 flags,
224 return mgs_completion_ast_generic(lock, flags, cbdata, AST_IR);
227 void mgs_revoke_lock(struct mgs_device *mgs, struct fs_db *fsdb, int type)
229 ldlm_completion_callback cp = NULL;
230 struct lustre_handle lockh = { 0 };
231 struct ldlm_res_id res_id;
232 __u64 flags = LDLM_FL_ATOMIC_CB;
236 LASSERT(fsdb->fsdb_name[0] != '\0');
237 rc = mgc_fsname2resid(fsdb->fsdb_name, &res_id, type);
240 case CONFIG_T_CONFIG:
241 cp = mgs_completion_ast_config;
242 if (test_and_set_bit(FSDB_REVOKING_LOCK, &fsdb->fsdb_flags))
245 case CONFIG_T_PARAMS:
246 cp = mgs_completion_ast_params;
247 if (test_and_set_bit(FSDB_REVOKING_PARAMS, &fsdb->fsdb_flags))
250 case CONFIG_T_RECOVER:
251 cp = mgs_completion_ast_ir;
258 rc = ldlm_cli_enqueue_local(mgs->mgs_obd->obd_namespace,
259 &res_id, LDLM_PLAIN, NULL, LCK_EX,
260 &flags, ldlm_blocking_ast, cp,
261 NULL, fsdb, 0, LVB_T_NONE, NULL,
263 if (rc != ELDLM_OK) {
264 CERROR("can't take cfg lock for "LPX64"/"LPX64"(%d)\n",
265 le64_to_cpu(res_id.name[0]),
266 le64_to_cpu(res_id.name[1]), rc);
268 if (type == CONFIG_T_CONFIG)
269 clear_bit(FSDB_REVOKING_LOCK,
272 if (type == CONFIG_T_PARAMS)
273 clear_bit(FSDB_REVOKING_PARAMS,
276 /* lock has been cancelled in completion_ast. */
285 static int mgs_check_target(const struct lu_env *env,
286 struct mgs_device *mgs,
287 struct mgs_target_info *mti)
292 rc = mgs_check_index(env, mgs, mti);
294 LCONSOLE_ERROR_MSG(0x13b, "%s claims to have registered, but "
295 "this MGS does not know about it, preventing "
296 "registration.\n", mti->mti_svname);
298 } else if (rc == -1) {
299 LCONSOLE_ERROR_MSG(0x13c, "Client log %s-client has "
300 "disappeared! Regenerating all logs.\n",
302 mti->mti_flags |= LDD_F_WRITECONF;
305 /* Index is correctly marked as used */
307 /* If the logs don't contain the mti_nids then add
308 them as failover nids */
309 rc = mgs_check_failnid(env, mgs, mti);
315 /* Ensure this is not a failover node that is connecting first*/
316 static int mgs_check_failover_reg(struct mgs_target_info *mti)
322 ptr = mti->mti_params;
323 while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
324 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
325 for (i = 0; i < mti->mti_nid_count; i++) {
326 if (nid == mti->mti_nids[i]) {
327 LCONSOLE_WARN("Denying initial registra"
328 "tion attempt from nid %s"
329 ", specified as failover"
330 "\n",libcfs_nid2str(nid));
331 return -EADDRNOTAVAIL;
339 /* Called whenever a target starts up. Flags indicate first connect, etc. */
340 static int mgs_target_reg(struct tgt_session_info *tsi)
342 struct obd_device *obd = tsi->tsi_exp->exp_obd;
343 struct mgs_device *mgs = exp2mgs_dev(tsi->tsi_exp);
344 struct mgs_target_info *mti, *rep_mti;
351 rc = lu_env_refill((struct lu_env *)tsi->tsi_env);
353 return err_serious(rc);
355 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_REG);
357 mti = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
359 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no mgs_send_param");
360 RETURN(err_serious(-EFAULT));
363 if (OCD_HAS_FLAG(&tgt_ses_req(tsi)->rq_export->exp_connect_data,
365 opc = mti->mti_flags & LDD_F_OPC_MASK;
369 if (opc == LDD_F_OPC_READY) {
370 CDEBUG(D_MGS, "fs: %s index: %d is ready to reconnect.\n",
371 mti->mti_fsname, mti->mti_stripe_index);
372 rc = mgs_ir_update(tsi->tsi_env, mgs, mti);
374 LASSERT(!(mti->mti_flags & LDD_F_IR_CAPABLE));
375 CERROR("Update IR return with %d(ignore and IR "
378 GOTO(out_nolock, rc);
381 /* Do not support unregistering right now. */
382 if (opc != LDD_F_OPC_REG)
383 GOTO(out_nolock, rc = -EINVAL);
385 CDEBUG(D_MGS, "fs: %s index: %d is registered to MGS.\n",
386 mti->mti_fsname, mti->mti_stripe_index);
388 if (mti->mti_flags & LDD_F_NEED_INDEX)
389 mti->mti_flags |= LDD_F_WRITECONF;
391 if (!(mti->mti_flags & (LDD_F_WRITECONF | LDD_F_UPGRADE14 |
393 /* We're just here as a startup ping. */
394 CDEBUG(D_MGS, "Server %s is running on %s\n",
395 mti->mti_svname, obd_export_nid2str(tsi->tsi_exp));
396 rc = mgs_check_target(tsi->tsi_env, mgs, mti);
397 /* above will set appropriate mti flags */
399 /* Nothing wrong, or fatal error */
400 GOTO(out_nolock, rc);
401 } else if (!(mti->mti_flags & LDD_F_NO_PRIMNODE)) {
402 rc = mgs_check_failover_reg(mti);
404 GOTO(out_nolock, rc);
407 OBD_FAIL_TIMEOUT(OBD_FAIL_MGS_PAUSE_TARGET_REG, 10);
409 if (mti->mti_flags & LDD_F_WRITECONF) {
410 if (mti->mti_flags & LDD_F_SV_TYPE_MDT &&
411 mti->mti_stripe_index == 0) {
412 rc = mgs_erase_logs(tsi->tsi_env, mgs,
414 LCONSOLE_WARN("%s: Logs for fs %s were removed by user "
415 "request. All servers must be restarted "
416 "in order to regenerate the logs."
417 "\n", obd->obd_name, mti->mti_fsname);
418 } else if (mti->mti_flags &
419 (LDD_F_SV_TYPE_OST | LDD_F_SV_TYPE_MDT)) {
420 rc = mgs_erase_log(tsi->tsi_env, mgs, mti->mti_svname);
421 LCONSOLE_WARN("%s: Regenerating %s log by user "
423 obd->obd_name, mti->mti_svname);
425 mti->mti_flags |= LDD_F_UPDATE;
426 /* Erased logs means start from scratch. */
427 mti->mti_flags &= ~LDD_F_UPGRADE14;
429 GOTO(out_nolock, rc);
432 rc = mgs_find_or_make_fsdb(tsi->tsi_env, mgs, mti->mti_fsname, &fsdb);
434 CERROR("Can't get db for %s: %d\n", mti->mti_fsname, rc);
435 GOTO(out_nolock, rc);
439 * Log writing contention is handled by the fsdb_mutex.
441 * It should be alright if someone was reading while we were
442 * updating the logs - if we revoke at the end they will just update
443 * from where they left off.
446 if (mti->mti_flags & LDD_F_UPGRADE14) {
447 CERROR("Can't upgrade from 1.4 (%d)\n", rc);
451 if (mti->mti_flags & LDD_F_UPDATE) {
452 CDEBUG(D_MGS, "updating %s, index=%d\n", mti->mti_svname,
453 mti->mti_stripe_index);
455 /* create or update the target log
456 and update the client/mdt logs */
457 rc = mgs_write_log_target(tsi->tsi_env, mgs, mti, fsdb);
459 CERROR("Failed to write %s log (%d)\n",
460 mti->mti_svname, rc);
464 mti->mti_flags &= ~(LDD_F_VIRGIN | LDD_F_UPDATE |
465 LDD_F_NEED_INDEX | LDD_F_WRITECONF |
467 mti->mti_flags |= LDD_F_REWRITE_LDD;
471 mgs_revoke_lock(mgs, fsdb, CONFIG_T_CONFIG);
474 CDEBUG(D_MGS, "replying with %s, index=%d, rc=%d\n", mti->mti_svname,
475 mti->mti_stripe_index, rc);
476 /* An error flag is set in the mti reply rather than an error code */
478 mti->mti_flags |= LDD_F_ERROR;
480 /* send back the whole mti in the reply */
481 rep_mti = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
484 /* Flush logs to disk */
485 dt_sync(tsi->tsi_env, mgs->mgs_bottom);
489 /* Called whenever a target cleans up. */
490 static int mgs_target_del(struct tgt_session_info *tsi)
494 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_DEL);
499 static int mgs_config_read(struct tgt_session_info *tsi)
501 struct ptlrpc_request *req = tgt_ses_req(tsi);
502 struct mgs_config_body *body;
507 body = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_CONFIG_BODY);
509 DEBUG_REQ(D_HA, req, "no mgs_config_body");
510 RETURN(err_serious(-EFAULT));
513 switch (body->mcb_type) {
514 case CONFIG_T_RECOVER:
515 rc = mgs_get_ir_logs(req);
517 case CONFIG_T_CONFIG:
528 static int mgs_llog_open(struct tgt_session_info *tsi)
530 struct mgs_thread_info *mgi;
531 struct ptlrpc_request *req = tgt_ses_req(tsi);
537 rc = tgt_llog_open(tsi);
542 * For old clients there is no direct way of knowing which file system
543 * a client is operating at the MGS side. But we need to pick up those
544 * clients so that the MGS can mark the corresponding file system as
545 * non-IR capable because old clients are not ready to be notified.
547 * Therefore we attempt to detect the file systems name by hacking the
548 * llog operation which is currently used by the clients to fetch
549 * configuration logs. At present this is fine because this is the
550 * ONLY llog operation between mgc and the MGS.
552 * If extra llog operation are going to be added, this function needs
555 * When releases prior than 2.0 are not supported, the following code
558 mgi = mgs_env_info(tsi->tsi_env);
560 RETURN(PTR_ERR(mgi));
562 logname = req_capsule_client_get(tsi->tsi_pill, &RMF_NAME);
564 char *ptr = strchr(logname, '-');
565 int len = (ptr != NULL) ? (int)(ptr - logname) : 0;
567 if (ptr == NULL || len >= sizeof(mgi->mgi_fsname)) {
568 if (strcmp(logname, PARAMS_FILENAME) != 0)
569 LCONSOLE_WARN("%s: non-config logname "
571 tgt_name(tsi->tsi_tgt),
573 /* not error, this can be llog test name */
575 strncpy(mgi->mgi_fsname, logname, len);
576 mgi->mgi_fsname[len] = 0;
578 rc = mgs_fsc_attach(tsi->tsi_env, tsi->tsi_exp,
580 if (rc && rc != -EEXIST) {
581 LCONSOLE_WARN("%s: Unable to add client %s "
582 "to file system %s: %d\n",
583 tgt_name(tsi->tsi_tgt),
584 libcfs_nid2str(req->rq_peer.nid),
585 mgi->mgi_fsname, rc);
591 CERROR("%s: no logname in request\n", tgt_name(tsi->tsi_tgt));
597 static inline int mgs_init_export(struct obd_export *exp)
599 struct mgs_export_data *data = &exp->u.eu_mgs_data;
601 /* init mgs_export_data for fsc */
602 spin_lock_init(&data->med_lock);
603 INIT_LIST_HEAD(&data->med_clients);
605 spin_lock(&exp->exp_lock);
606 exp->exp_connecting = 1;
607 spin_unlock(&exp->exp_lock);
609 /* self-export doesn't need client data and ldlm initialization */
610 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
611 &exp->exp_client_uuid)))
613 return ldlm_init_export(exp);
616 static inline int mgs_destroy_export(struct obd_export *exp)
620 target_destroy_export(exp);
621 mgs_client_free(exp);
623 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
624 &exp->exp_client_uuid)))
627 ldlm_destroy_export(exp);
632 static int mgs_extract_fs_pool(char * arg, char *fsname, char *poolname)
637 for (ptr = arg; (*ptr != '\0') && (*ptr != '.'); ptr++ ) {
645 strcpy(poolname, ptr);
650 static int mgs_iocontrol_nodemap(const struct lu_env *env,
651 struct mgs_device *mgs,
652 struct obd_ioctl_data *data)
654 struct lustre_cfg *lcfg = NULL;
656 const char *nodemap_name = NULL;
657 const char *nidstr = NULL;
658 const char *client_idstr = NULL;
659 const char *idtype_str = NULL;
662 char name_buf[LUSTRE_NODEMAP_NAME_LENGTH + 1];
664 unsigned long client_id;
671 if (data->ioc_type != LUSTRE_CFG_TYPE) {
672 CERROR("%s: unknown cfg record type: %d\n",
673 mgs->mgs_obd->obd_name, data->ioc_type);
674 GOTO(out, rc = -EINVAL);
677 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
678 GOTO(out, rc = -E2BIG);
680 OBD_ALLOC(lcfg, data->ioc_plen1);
682 GOTO(out, rc = -ENOMEM);
684 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
685 GOTO(out_lcfg, rc = -EFAULT);
687 cmd = lcfg->lcfg_command;
690 case LCFG_NODEMAP_ACTIVATE:
691 if (lcfg->lcfg_bufcount != 2)
692 GOTO(out_lcfg, rc = -EINVAL);
693 param = lustre_cfg_string(lcfg, 1);
694 if (strcmp(param, "1") == 0)
699 case LCFG_NODEMAP_ADD:
700 case LCFG_NODEMAP_DEL:
701 if (lcfg->lcfg_bufcount != 2)
702 GOTO(out_lcfg, rc = -EINVAL);
703 nodemap_name = lustre_cfg_string(lcfg, 1);
704 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
706 case LCFG_NODEMAP_TEST_NID:
707 if (lcfg->lcfg_bufcount != 2)
708 GOTO(out_lcfg, rc = -EINVAL);
709 nidstr = lustre_cfg_string(lcfg, 1);
710 nid = libcfs_str2nid(nidstr);
711 nodemap_test_nid(nid, name_buf, sizeof(name_buf));
712 rc = copy_to_user(data->ioc_pbuf1, name_buf,
713 MIN(data->ioc_plen1, sizeof(name_buf)));
715 GOTO(out_lcfg, rc = -EFAULT);
717 case LCFG_NODEMAP_TEST_ID:
718 if (lcfg->lcfg_bufcount != 4)
719 GOTO(out_lcfg, rc = -EINVAL);
720 nidstr = lustre_cfg_string(lcfg, 1);
721 idtype_str = lustre_cfg_string(lcfg, 2);
722 client_idstr = lustre_cfg_string(lcfg, 3);
724 nid = libcfs_str2nid(nidstr);
725 if (strcmp(idtype_str, "uid") == 0)
726 idtype = NODEMAP_UID;
728 idtype = NODEMAP_GID;
730 rc = kstrtoul(client_idstr, 10, &client_id);
732 GOTO(out_lcfg, rc = -EINVAL);
734 fs_id = nodemap_test_id(nid, idtype, client_id);
736 if (data->ioc_plen1 < sizeof(fs_idstr))
737 GOTO(out_lcfg, rc = -EINVAL);
739 snprintf(fs_idstr, sizeof(fs_idstr), "%u", fs_id);
740 if (copy_to_user(data->ioc_pbuf1, fs_idstr,
741 sizeof(fs_idstr)) != 0)
742 GOTO(out_lcfg, rc = -EINVAL);
744 case LCFG_NODEMAP_ADD_RANGE:
745 case LCFG_NODEMAP_DEL_RANGE:
746 case LCFG_NODEMAP_ADD_UIDMAP:
747 case LCFG_NODEMAP_DEL_UIDMAP:
748 case LCFG_NODEMAP_ADD_GIDMAP:
749 case LCFG_NODEMAP_DEL_GIDMAP:
750 if (lcfg->lcfg_bufcount != 3)
751 GOTO(out_lcfg, rc = -EINVAL);
752 nodemap_name = lustre_cfg_string(lcfg, 1);
753 param = lustre_cfg_string(lcfg, 2);
754 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
756 case LCFG_NODEMAP_ADMIN:
757 case LCFG_NODEMAP_TRUSTED:
758 case LCFG_NODEMAP_SQUASH_UID:
759 case LCFG_NODEMAP_SQUASH_GID:
760 if (lcfg->lcfg_bufcount != 4)
761 GOTO(out_lcfg, rc = -EINVAL);
762 nodemap_name = lustre_cfg_string(lcfg, 1);
763 param = lustre_cfg_string(lcfg, 3);
764 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
771 CERROR("%s: OBD_IOC_NODEMAP command %X for %s: rc = %d\n",
772 mgs->mgs_obd->obd_name, lcfg->lcfg_command,
778 OBD_FREE(lcfg, data->ioc_plen1);
783 static int mgs_iocontrol_pool(const struct lu_env *env,
784 struct mgs_device *mgs,
785 struct obd_ioctl_data *data)
787 struct mgs_thread_info *mgi = mgs_env_info(env);
789 struct lustre_cfg *lcfg = NULL;
790 char *poolname = NULL;
793 OBD_ALLOC(poolname, LOV_MAXPOOLNAME + 1);
794 if (poolname == NULL)
797 if (data->ioc_type != LUSTRE_CFG_TYPE) {
798 CERROR("%s: unknown cfg record type: %d\n",
799 mgs->mgs_obd->obd_name, data->ioc_type);
800 GOTO(out_pool, rc = -EINVAL);
803 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
804 GOTO(out_pool, rc = -E2BIG);
806 OBD_ALLOC(lcfg, data->ioc_plen1);
808 GOTO(out_pool, rc = -ENOMEM);
810 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
811 GOTO(out_lcfg, rc = -EFAULT);
813 if (lcfg->lcfg_bufcount < 2)
814 GOTO(out_lcfg, rc = -EFAULT);
816 /* first arg is always <fsname>.<poolname> */
817 rc = mgs_extract_fs_pool(lustre_cfg_string(lcfg, 1), mgi->mgi_fsname,
822 switch (lcfg->lcfg_command) {
824 if (lcfg->lcfg_bufcount != 2)
825 GOTO(out_lcfg, rc = -EINVAL);
826 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_NEW, mgi->mgi_fsname,
830 if (lcfg->lcfg_bufcount != 3)
831 GOTO(out_lcfg, rc = -EINVAL);
832 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_ADD, mgi->mgi_fsname,
833 poolname, lustre_cfg_string(lcfg, 2));
836 if (lcfg->lcfg_bufcount != 3)
837 GOTO(out_lcfg, rc = -EINVAL);
838 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_REM, mgi->mgi_fsname,
839 poolname, lustre_cfg_string(lcfg, 2));
842 if (lcfg->lcfg_bufcount != 2)
843 GOTO(out_lcfg, rc = -EINVAL);
844 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_DEL, mgi->mgi_fsname,
852 CERROR("OBD_IOC_POOL err %d, cmd %X for pool %s.%s\n",
853 rc, lcfg->lcfg_command, mgi->mgi_fsname, poolname);
858 OBD_FREE(lcfg, data->ioc_plen1);
860 OBD_FREE(poolname, LOV_MAXPOOLNAME + 1);
864 /* from mdt_iocontrol */
865 static int mgs_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
866 void *karg, void __user *uarg)
868 struct mgs_device *mgs = exp2mgs_dev(exp);
869 struct obd_ioctl_data *data = karg;
874 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
876 rc = lu_env_init(&env, LCT_MG_THREAD);
882 case OBD_IOC_PARAM: {
883 struct mgs_thread_info *mgi = mgs_env_info(&env);
884 struct lustre_cfg *lcfg;
886 if (data->ioc_type != LUSTRE_CFG_TYPE) {
887 CERROR("%s: unknown cfg record type: %d\n",
888 mgs->mgs_obd->obd_name, data->ioc_type);
889 GOTO(out, rc = -EINVAL);
892 OBD_ALLOC(lcfg, data->ioc_plen1);
894 GOTO(out, rc = -ENOMEM);
895 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
896 GOTO(out_free, rc = -EFAULT);
898 if (lcfg->lcfg_bufcount < 1)
899 GOTO(out_free, rc = -EINVAL);
901 rc = mgs_setparam(&env, mgs, lcfg, mgi->mgi_fsname);
903 CERROR("%s: setparam err: rc = %d\n",
904 exp->exp_obd->obd_name, rc);
906 OBD_FREE(lcfg, data->ioc_plen1);
910 case OBD_IOC_REPLACE_NIDS: {
911 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
912 CERROR("No device name specified!\n");
917 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
918 CERROR("Device name is not NUL terminated!\n");
923 if (data->ioc_plen1 > MTI_NAME_MAXLEN) {
924 CERROR("Device name is too long\n");
929 if (!data->ioc_inllen2 || !data->ioc_inlbuf2) {
930 CERROR("No NIDs were specified!\n");
935 if (data->ioc_inlbuf2[data->ioc_inllen2 - 1] != 0) {
936 CERROR("NID list is not NUL terminated!\n");
941 /* replace nids in llog */
942 rc = mgs_replace_nids(&env, mgs, data->ioc_inlbuf1,
945 CERROR("%s: error replacing nids: rc = %d\n",
946 exp->exp_obd->obd_name, rc);
952 rc = mgs_iocontrol_pool(&env, mgs, data);
955 case OBD_IOC_NODEMAP:
956 rc = mgs_iocontrol_nodemap(&env, mgs, data);
959 case OBD_IOC_CATLOGLIST:
960 rc = mgs_list_logs(&env, mgs, data);
962 case OBD_IOC_LLOG_CANCEL:
963 case OBD_IOC_LLOG_REMOVE:
964 case OBD_IOC_LLOG_CHECK:
965 case OBD_IOC_LLOG_INFO:
966 case OBD_IOC_LLOG_PRINT: {
967 struct llog_ctxt *ctxt;
969 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
970 rc = llog_ioctl(&env, ctxt, cmd, data);
976 CERROR("%s: unknown command %#x\n",
977 mgs->mgs_obd->obd_name, cmd);
986 static int mgs_connect_to_osd(struct mgs_device *m, const char *nextdev)
988 struct obd_connect_data *data = NULL;
989 struct obd_device *obd;
997 obd = class_name2obd(nextdev);
999 CERROR("can't locate next device: %s\n", nextdev);
1000 GOTO(out, rc = -ENOTCONN);
1003 data->ocd_version = LUSTRE_VERSION_CODE;
1005 rc = obd_connect(NULL, &m->mgs_bottom_exp, obd,
1006 &obd->obd_uuid, data, NULL);
1008 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
1012 m->mgs_bottom = lu2dt_dev(m->mgs_bottom_exp->exp_obd->obd_lu_dev);
1013 m->mgs_dt_dev.dd_lu_dev.ld_site = m->mgs_bottom->dd_lu_dev.ld_site;
1014 LASSERT(m->mgs_dt_dev.dd_lu_dev.ld_site);
1020 static struct tgt_handler mgs_mgs_handlers[] = {
1021 TGT_RPC_HANDLER(MGS_FIRST_OPC,
1022 0, MGS_CONNECT, mgs_connect,
1023 &RQF_CONNECT, LUSTRE_OBD_VERSION),
1024 TGT_RPC_HANDLER(MGS_FIRST_OPC,
1025 0, MGS_DISCONNECT, mgs_disconnect,
1026 &RQF_MDS_DISCONNECT, LUSTRE_OBD_VERSION),
1027 TGT_MGS_HDL_VAR(0, MGS_EXCEPTION, mgs_exception),
1028 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_SET_INFO, mgs_set_info),
1029 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_TARGET_REG, mgs_target_reg),
1030 TGT_MGS_HDL_VAR(0, MGS_TARGET_DEL, mgs_target_del),
1031 TGT_MGS_HDL (HABEO_REFERO, MGS_CONFIG_READ, mgs_config_read),
1034 static struct tgt_handler mgs_obd_handlers[] = {
1035 TGT_OBD_HDL(0, OBD_PING, tgt_obd_ping),
1038 static struct tgt_handler mgs_dlm_handlers[] = {
1039 [LDLM_ENQUEUE - LDLM_FIRST_OPC] = {
1040 .th_name = "LDLM_ENQUEUE",
1041 /* don't use th_fail_id for MGS to don't interfere with MDS tests.
1042 * * There are no tests for MGS with OBD_FAIL_LDLM_ENQUEUE_NET so it
1043 * * is safe. If such tests will be needed we have to distinguish
1044 * * MDS and MGS fail ids, e.g use OBD_FAIL_MGS_ENQUEUE_NET for MGS
1045 * * instead of common OBD_FAIL_LDLM_ENQUEUE_NET */
1047 .th_opc = LDLM_ENQUEUE,
1048 .th_flags = HABEO_CLAVIS,
1049 .th_act = tgt_enqueue,
1050 .th_fmt = &RQF_LDLM_ENQUEUE,
1051 .th_version = LUSTRE_DLM_VERSION,
1055 static struct tgt_handler mgs_llog_handlers[] = {
1056 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, mgs_llog_open),
1057 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1058 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1059 TGT_LLOG_HDL_VAR(0, LLOG_ORIGIN_HANDLE_CLOSE, tgt_llog_close),
1060 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1063 static struct tgt_opc_slice mgs_common_slice[] = {
1065 .tos_opc_start = MGS_FIRST_OPC,
1066 .tos_opc_end = MGS_LAST_OPC,
1067 .tos_hs = mgs_mgs_handlers
1070 .tos_opc_start = OBD_FIRST_OPC,
1071 .tos_opc_end = OBD_LAST_OPC,
1072 .tos_hs = mgs_obd_handlers
1075 .tos_opc_start = LDLM_FIRST_OPC,
1076 .tos_opc_end = LDLM_LAST_OPC,
1077 .tos_hs = mgs_dlm_handlers
1080 .tos_opc_start = LLOG_FIRST_OPC,
1081 .tos_opc_end = LLOG_LAST_OPC,
1082 .tos_hs = mgs_llog_handlers
1085 .tos_opc_start = SEC_FIRST_OPC,
1086 .tos_opc_end = SEC_LAST_OPC,
1087 .tos_hs = tgt_sec_ctx_handlers
1094 static int mgs_init0(const struct lu_env *env, struct mgs_device *mgs,
1095 struct lu_device_type *ldt, struct lustre_cfg *lcfg)
1097 struct ptlrpc_service_conf conf;
1098 struct obd_device *obd;
1099 struct lustre_mount_info *lmi;
1100 struct llog_ctxt *ctxt;
1101 struct fs_db *fsdb = NULL;
1102 struct fs_db *fsdb_srpc = NULL;
1107 lmi = server_get_mount(lustre_cfg_string(lcfg, 0));
1111 mgs->mgs_dt_dev.dd_lu_dev.ld_ops = &mgs_lu_ops;
1113 rc = mgs_connect_to_osd(mgs, lustre_cfg_string(lcfg, 3));
1117 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1120 mgs->mgs_obd->obd_lu_dev = &mgs->mgs_dt_dev.dd_lu_dev;
1122 obd->u.obt.obt_magic = OBT_MAGIC;
1123 obd->u.obt.obt_instance = 0;
1125 /* namespace for mgs llog */
1126 obd->obd_namespace = ldlm_namespace_new(obd ,"MGS",
1127 LDLM_NAMESPACE_SERVER,
1128 LDLM_NAMESPACE_MODEST,
1130 if (obd->obd_namespace == NULL)
1131 GOTO(err_ops, rc = -ENOMEM);
1133 /* No recovery for MGCs */
1134 obd->obd_replayable = 0;
1136 rc = tgt_init(env, &mgs->mgs_lut, obd, mgs->mgs_bottom,
1137 mgs_common_slice, OBD_FAIL_MGS_ALL_REQUEST_NET,
1138 OBD_FAIL_MGS_ALL_REPLY_NET);
1142 rc = mgs_fs_setup(env, mgs);
1144 CERROR("%s: MGS filesystem method init failed: rc = %d\n",
1149 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT,
1150 obd, &llog_osd_ops);
1154 /* XXX: we need this trick till N:1 stack is supported
1155 * set "current" directory for named llogs */
1156 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1158 ctxt->loc_dir = mgs->mgs_configs_dir;
1159 llog_ctxt_put(ctxt);
1161 /* Internal mgs setup */
1162 mgs_init_fsdb_list(mgs);
1163 mutex_init(&mgs->mgs_mutex);
1164 mgs->mgs_start_time = cfs_time_current_sec();
1165 spin_lock_init(&mgs->mgs_lock);
1166 mutex_init(&mgs->mgs_health_mutex);
1168 rc = lproc_mgs_setup(mgs, lustre_cfg_string(lcfg, 3));
1170 CERROR("%s: cannot initialize proc entry: rc = %d\n",
1175 /* Setup params fsdb and log, so that other servers can make a local
1176 * copy successfully when they are mounted. See LU-4783 */
1177 rc = mgs_params_fsdb_setup(env, mgs, fsdb);
1179 /* params fsdb and log can be setup later */
1180 CERROR("%s: %s fsdb and log setup failed: rc = %d\n",
1181 obd->obd_name, PARAMS_FILENAME, rc);
1183 /* Setup _mgs fsdb, useful for srpc */
1184 mgs__mgs_fsdb_setup(env, mgs, fsdb_srpc);
1186 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1187 "mgs_ldlm_client", &obd->obd_ldlm_client);
1189 conf = (typeof(conf)) {
1190 .psc_name = LUSTRE_MGS_NAME,
1191 .psc_watchdog_factor = MGS_SERVICE_WATCHDOG_FACTOR,
1193 .bc_nbufs = MGS_NBUFS,
1194 .bc_buf_size = MGS_BUFSIZE,
1195 .bc_req_max_size = MGS_MAXREQSIZE,
1196 .bc_rep_max_size = MGS_MAXREPSIZE,
1197 .bc_req_portal = MGS_REQUEST_PORTAL,
1198 .bc_rep_portal = MGC_REPLY_PORTAL,
1201 .tc_thr_name = "ll_mgs",
1202 .tc_nthrs_init = MGS_NTHRS_INIT,
1203 .tc_nthrs_max = MGS_NTHRS_MAX,
1204 .tc_ctx_tags = LCT_MG_THREAD,
1207 .so_req_handler = tgt_request_handle,
1208 .so_req_printer = target_print_req,
1212 /* Start the service threads */
1213 mgs->mgs_service = ptlrpc_register_service(&conf, obd->obd_proc_entry);
1214 if (IS_ERR(mgs->mgs_service)) {
1215 rc = PTR_ERR(mgs->mgs_service);
1216 CERROR("failed to start mgs service: %d\n", rc);
1217 mgs->mgs_service = NULL;
1218 GOTO(err_lproc, rc);
1221 ping_evictor_start();
1223 CDEBUG(D_INFO, "MGS %s started\n", obd->obd_name);
1225 /* device stack is not yet fully setup to keep no objects behind */
1226 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1229 mgs_params_fsdb_cleanup(env, mgs);
1230 lproc_mgs_cleanup(mgs);
1232 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1234 ctxt->loc_dir = NULL;
1235 llog_cleanup(env, ctxt);
1238 tgt_fini(env, &mgs->mgs_lut);
1240 /* No extra cleanup needed for llog_init_commit_thread() */
1241 mgs_fs_cleanup(env, mgs);
1243 ldlm_namespace_free(obd->obd_namespace, NULL, 0);
1244 obd->obd_namespace = NULL;
1246 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1247 if (!cfs_hash_is_empty(mgs2lu_dev(mgs)->ld_site->ls_obj_hash)) {
1248 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1249 lu_site_print(env, mgs2lu_dev(mgs)->ld_site, &msgdata,
1252 obd_disconnect(mgs->mgs_bottom_exp);
1255 server_put_mount(lustre_cfg_string(lcfg, 0), true);
1259 static struct lu_device *mgs_device_free(const struct lu_env *env,
1260 struct lu_device *lu)
1262 struct mgs_device *mgs = lu2mgs_dev(lu);
1265 dt_device_fini(&mgs->mgs_dt_dev);
1270 static int mgs_process_config(const struct lu_env *env,
1271 struct lu_device *dev,
1272 struct lustre_cfg *lcfg)
1278 static int mgs_object_init(const struct lu_env *env, struct lu_object *o,
1279 const struct lu_object_conf *unused)
1281 struct mgs_device *d = lu2mgs_dev(o->lo_dev);
1282 struct lu_device *under;
1283 struct lu_object *below;
1287 /* do no set .do_ops as mgs calls to bottom osd directly */
1289 CDEBUG(D_INFO, "object init, fid = "DFID"\n",
1290 PFID(lu_object_fid(o)));
1292 under = &d->mgs_bottom->dd_lu_dev;
1293 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
1295 lu_object_add(o, below);
1302 static void mgs_object_free(const struct lu_env *env, struct lu_object *o)
1304 struct mgs_object *obj = lu2mgs_obj(o);
1305 struct lu_object_header *h = o->lo_header;
1307 dt_object_fini(&obj->mgo_obj);
1308 lu_object_header_fini(h);
1312 static int mgs_object_print(const struct lu_env *env, void *cookie,
1313 lu_printer_t p, const struct lu_object *l)
1315 const struct mgs_object *o = lu2mgs_obj((struct lu_object *) l);
1317 return (*p)(env, cookie, LUSTRE_MGS_NAME"-object@%p", o);
1320 static struct lu_object_operations mgs_lu_obj_ops = {
1321 .loo_object_init = mgs_object_init,
1322 .loo_object_free = mgs_object_free,
1323 .loo_object_print = mgs_object_print,
1326 static struct lu_object *mgs_object_alloc(const struct lu_env *env,
1327 const struct lu_object_header *hdr,
1328 struct lu_device *d)
1330 struct lu_object_header *h;
1331 struct mgs_object *o;
1332 struct lu_object *l;
1334 LASSERT(hdr == NULL);
1338 l = &o->mgo_obj.do_lu;
1341 lu_object_header_init(h);
1342 dt_object_init(&o->mgo_obj, h, d);
1343 lu_object_add_top(h, l);
1345 l->lo_ops = &mgs_lu_obj_ops;
1353 const struct lu_device_operations mgs_lu_ops = {
1354 .ldo_object_alloc = mgs_object_alloc,
1355 .ldo_process_config = mgs_process_config,
1358 static struct lu_device *mgs_device_alloc(const struct lu_env *env,
1359 struct lu_device_type *type,
1360 struct lustre_cfg *lcfg)
1362 struct mgs_device *mgs;
1363 struct lu_device *ludev;
1367 ludev = ERR_PTR(-ENOMEM);
1371 ludev = mgs2lu_dev(mgs);
1372 dt_device_init(&mgs->mgs_dt_dev, type);
1373 rc = mgs_init0(env, mgs, type, lcfg);
1375 mgs_device_free(env, ludev);
1376 ludev = ERR_PTR(rc);
1382 static struct lu_device *mgs_device_fini(const struct lu_env *env,
1383 struct lu_device *d)
1385 struct mgs_device *mgs = lu2mgs_dev(d);
1386 struct obd_device *obd = mgs->mgs_obd;
1387 struct llog_ctxt *ctxt;
1391 LASSERT(mgs->mgs_bottom);
1393 class_disconnect_exports(obd);
1395 ping_evictor_stop();
1397 mutex_lock(&mgs->mgs_health_mutex);
1398 ptlrpc_unregister_service(mgs->mgs_service);
1399 mutex_unlock(&mgs->mgs_health_mutex);
1401 mgs_params_fsdb_cleanup(env, mgs);
1402 mgs_cleanup_fsdb_list(mgs);
1404 ldlm_namespace_free_prior(obd->obd_namespace, NULL, 1);
1405 obd_exports_barrier(obd);
1406 obd_zombie_barrier();
1408 tgt_fini(env, &mgs->mgs_lut);
1409 lproc_mgs_cleanup(mgs);
1411 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1413 ctxt->loc_dir = NULL;
1414 llog_cleanup(env, ctxt);
1417 mgs_fs_cleanup(env, mgs);
1419 ldlm_namespace_free_post(obd->obd_namespace);
1420 obd->obd_namespace = NULL;
1422 lu_site_purge(env, d->ld_site, ~0);
1423 if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
1424 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1425 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
1428 LASSERT(mgs->mgs_bottom_exp);
1429 obd_disconnect(mgs->mgs_bottom_exp);
1431 server_put_mount(obd->obd_name, true);
1436 /* context key constructor/destructor: mgs_key_init, mgs_key_fini */
1437 LU_KEY_INIT_FINI(mgs, struct mgs_thread_info);
1439 LU_TYPE_INIT_FINI(mgs, &mgs_thread_key);
1441 LU_CONTEXT_KEY_DEFINE(mgs, LCT_MG_THREAD);
1443 static struct lu_device_type_operations mgs_device_type_ops = {
1444 .ldto_init = mgs_type_init,
1445 .ldto_fini = mgs_type_fini,
1447 .ldto_start = mgs_type_start,
1448 .ldto_stop = mgs_type_stop,
1450 .ldto_device_alloc = mgs_device_alloc,
1451 .ldto_device_free = mgs_device_free,
1453 .ldto_device_fini = mgs_device_fini
1456 static struct lu_device_type mgs_device_type = {
1457 .ldt_tags = LU_DEVICE_DT,
1458 .ldt_name = LUSTRE_MGS_NAME,
1459 .ldt_ops = &mgs_device_type_ops,
1460 .ldt_ctx_tags = LCT_MG_THREAD
1463 static int mgs_obd_connect(const struct lu_env *env, struct obd_export **exp,
1464 struct obd_device *obd, struct obd_uuid *cluuid,
1465 struct obd_connect_data *data, void *localdata)
1467 struct obd_export *lexp;
1468 struct lustre_handle conn = { 0 };
1473 if (exp == NULL || obd == NULL || cluuid == NULL)
1476 rc = class_connect(&conn, obd, cluuid);
1480 lexp = class_conn2export(&conn);
1485 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1486 data->ocd_version = LUSTRE_VERSION_CODE;
1487 lexp->exp_connect_data = *data;
1490 tgt_counter_incr(lexp, LPROC_MGS_CONNECT);
1492 rc = mgs_export_stats_init(obd, lexp, localdata);
1494 class_disconnect(lexp);
1501 static int mgs_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
1502 struct obd_device *obd, struct obd_uuid *cluuid,
1503 struct obd_connect_data *data, void *localdata)
1507 if (exp == NULL || obd == NULL || cluuid == NULL)
1510 tgt_counter_incr(exp, LPROC_MGS_CONNECT);
1513 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1514 data->ocd_version = LUSTRE_VERSION_CODE;
1515 exp->exp_connect_data = *data;
1518 RETURN(mgs_export_stats_init(obd, exp, localdata));
1521 static int mgs_obd_disconnect(struct obd_export *exp)
1529 mgs_fsc_cleanup(exp);
1531 class_export_get(exp);
1532 tgt_counter_incr(exp, LPROC_MGS_DISCONNECT);
1534 rc = server_disconnect_export(exp);
1535 class_export_put(exp);
1539 static int mgs_health_check(const struct lu_env *env, struct obd_device *obd)
1541 struct mgs_device *mgs = lu2mgs_dev(obd->obd_lu_dev);
1544 mutex_lock(&mgs->mgs_health_mutex);
1545 rc |= ptlrpc_service_health_check(mgs->mgs_service);
1546 mutex_unlock(&mgs->mgs_health_mutex);
1548 return rc != 0 ? 1 : 0;
1551 /* use obd ops to offer management infrastructure */
1552 static struct obd_ops mgs_obd_device_ops = {
1553 .o_owner = THIS_MODULE,
1554 .o_connect = mgs_obd_connect,
1555 .o_reconnect = mgs_obd_reconnect,
1556 .o_disconnect = mgs_obd_disconnect,
1557 .o_init_export = mgs_init_export,
1558 .o_destroy_export = mgs_destroy_export,
1559 .o_iocontrol = mgs_iocontrol,
1560 .o_health_check = mgs_health_check,
1563 static int __init mgs_init(void)
1565 return class_register_type(&mgs_obd_device_ops, NULL, true, NULL,
1566 LUSTRE_MGS_NAME, &mgs_device_type);
1569 static void __exit mgs_exit(void)
1571 class_unregister_type(LUSTRE_MGS_NAME);
1574 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1575 MODULE_DESCRIPTION("Lustre Management Server (MGS)");
1576 MODULE_VERSION(LUSTRE_VERSION_STRING);
1577 MODULE_LICENSE("GPL");
1579 module_init(mgs_init);
1580 module_exit(mgs_exit);