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 int mgs_set_info(struct tgt_session_info *tsi)
99 struct mgs_thread_info *mgi;
100 struct mgs_send_param *msp, *rep_msp;
101 struct lustre_cfg *lcfg;
106 mgi = mgs_env_info(tsi->tsi_env);
108 RETURN(err_serious(PTR_ERR(mgi)));
110 msp = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
112 RETURN(err_serious(-EFAULT));
114 /* Construct lustre_cfg structure to pass to function mgs_setparam */
115 lustre_cfg_bufs_reset(&mgi->mgi_bufs, NULL);
116 lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 1, msp->mgs_param);
117 lcfg = lustre_cfg_new(LCFG_PARAM, &mgi->mgi_bufs);
121 rc = mgs_setparam(tsi->tsi_env, exp2mgs_dev(tsi->tsi_exp), lcfg,
124 LCONSOLE_WARN("%s: Unable to set parameter %s for %s: %d\n",
125 tgt_name(tsi->tsi_tgt), msp->mgs_param,
126 mgi->mgi_fsname, rc);
130 /* send back the whole msp in the reply */
131 rep_msp = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
135 lustre_cfg_free(lcfg);
145 static int mgs_completion_ast_generic(struct ldlm_lock *lock, __u64 flags,
146 void *cbdata, enum ast_type type)
150 if (!(flags & LDLM_FL_BLOCKED_MASK)) {
153 /* l_ast_data is used as a marker to avoid cancel ldlm lock
154 * twice. See LU-2317. */
155 lock_res_and_lock(lock);
156 fsdb = (struct fs_db *)lock->l_ast_data;
157 lock->l_ast_data = NULL;
158 unlock_res_and_lock(lock);
161 struct lustre_handle lockh;
165 /* clear the bit before lock put */
166 clear_bit(FSDB_REVOKING_LOCK,
170 clear_bit(FSDB_REVOKING_PARAMS,
174 mgs_ir_notify_complete(fsdb);
180 ldlm_lock2handle(lock, &lockh);
181 ldlm_lock_decref_and_cancel(&lockh, LCK_EX);
185 RETURN(ldlm_completion_ast(lock, flags, cbdata));
188 static int mgs_completion_ast_config(struct ldlm_lock *lock, __u64 flags,
191 return mgs_completion_ast_generic(lock, flags, cbdata, AST_CONFIG);
194 static int mgs_completion_ast_params(struct ldlm_lock *lock, __u64 flags,
197 return mgs_completion_ast_generic(lock, flags, cbdata, AST_PARAMS);
200 static int mgs_completion_ast_ir(struct ldlm_lock *lock, __u64 flags,
203 return mgs_completion_ast_generic(lock, flags, cbdata, AST_IR);
206 void mgs_revoke_lock(struct mgs_device *mgs, struct fs_db *fsdb, int type)
208 ldlm_completion_callback cp = NULL;
209 struct lustre_handle lockh = { 0 };
210 struct ldlm_res_id res_id;
211 __u64 flags = LDLM_FL_ATOMIC_CB;
215 LASSERT(fsdb->fsdb_name[0] != '\0');
216 rc = mgc_fsname2resid(fsdb->fsdb_name, &res_id, type);
219 case CONFIG_T_CONFIG:
220 cp = mgs_completion_ast_config;
221 if (test_and_set_bit(FSDB_REVOKING_LOCK, &fsdb->fsdb_flags))
224 case CONFIG_T_PARAMS:
225 cp = mgs_completion_ast_params;
226 if (test_and_set_bit(FSDB_REVOKING_PARAMS, &fsdb->fsdb_flags))
229 case CONFIG_T_RECOVER:
230 cp = mgs_completion_ast_ir;
237 rc = ldlm_cli_enqueue_local(mgs->mgs_obd->obd_namespace,
238 &res_id, LDLM_PLAIN, NULL, LCK_EX,
239 &flags, ldlm_blocking_ast, cp,
240 NULL, fsdb, 0, LVB_T_NONE, NULL,
242 if (rc != ELDLM_OK) {
243 CERROR("can't take cfg lock for "LPX64"/"LPX64"(%d)\n",
244 le64_to_cpu(res_id.name[0]),
245 le64_to_cpu(res_id.name[1]), rc);
247 if (type == CONFIG_T_CONFIG)
248 clear_bit(FSDB_REVOKING_LOCK,
251 if (type == CONFIG_T_PARAMS)
252 clear_bit(FSDB_REVOKING_PARAMS,
255 /* lock has been cancelled in completion_ast. */
264 static int mgs_check_target(const struct lu_env *env,
265 struct mgs_device *mgs,
266 struct mgs_target_info *mti)
271 rc = mgs_check_index(env, mgs, mti);
273 LCONSOLE_ERROR_MSG(0x13b, "%s claims to have registered, but "
274 "this MGS does not know about it, preventing "
275 "registration.\n", mti->mti_svname);
277 } else if (rc == -1) {
278 LCONSOLE_ERROR_MSG(0x13c, "Client log %s-client has "
279 "disappeared! Regenerating all logs.\n",
281 mti->mti_flags |= LDD_F_WRITECONF;
284 /* Index is correctly marked as used */
286 /* If the logs don't contain the mti_nids then add
287 them as failover nids */
288 rc = mgs_check_failnid(env, mgs, mti);
294 /* Ensure this is not a failover node that is connecting first*/
295 static int mgs_check_failover_reg(struct mgs_target_info *mti)
301 ptr = mti->mti_params;
302 while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
303 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
304 for (i = 0; i < mti->mti_nid_count; i++) {
305 if (nid == mti->mti_nids[i]) {
306 LCONSOLE_WARN("Denying initial registra"
307 "tion attempt from nid %s"
308 ", specified as failover"
309 "\n",libcfs_nid2str(nid));
310 return -EADDRNOTAVAIL;
318 /* Called whenever a target starts up. Flags indicate first connect, etc. */
319 static int mgs_target_reg(struct tgt_session_info *tsi)
321 struct obd_device *obd = tsi->tsi_exp->exp_obd;
322 struct mgs_device *mgs = exp2mgs_dev(tsi->tsi_exp);
323 struct mgs_target_info *mti, *rep_mti;
330 rc = lu_env_refill((struct lu_env *)tsi->tsi_env);
332 return err_serious(rc);
334 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_REG);
336 mti = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
338 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no mgs_send_param");
339 RETURN(err_serious(-EFAULT));
342 if (OCD_HAS_FLAG(&tgt_ses_req(tsi)->rq_export->exp_connect_data,
344 opc = mti->mti_flags & LDD_F_OPC_MASK;
348 if (opc == LDD_F_OPC_READY) {
349 CDEBUG(D_MGS, "fs: %s index: %d is ready to reconnect.\n",
350 mti->mti_fsname, mti->mti_stripe_index);
351 rc = mgs_ir_update(tsi->tsi_env, mgs, mti);
353 LASSERT(!(mti->mti_flags & LDD_F_IR_CAPABLE));
354 CERROR("Update IR return with %d(ignore and IR "
357 GOTO(out_nolock, rc);
360 /* Do not support unregistering right now. */
361 if (opc != LDD_F_OPC_REG)
362 GOTO(out_nolock, rc = -EINVAL);
364 CDEBUG(D_MGS, "fs: %s index: %d is registered to MGS.\n",
365 mti->mti_fsname, mti->mti_stripe_index);
367 if (mti->mti_flags & LDD_F_NEED_INDEX)
368 mti->mti_flags |= LDD_F_WRITECONF;
370 if (!(mti->mti_flags & (LDD_F_WRITECONF | LDD_F_UPGRADE14 |
372 /* We're just here as a startup ping. */
373 CDEBUG(D_MGS, "Server %s is running on %s\n",
374 mti->mti_svname, obd_export_nid2str(tsi->tsi_exp));
375 rc = mgs_check_target(tsi->tsi_env, mgs, mti);
376 /* above will set appropriate mti flags */
378 /* Nothing wrong, or fatal error */
379 GOTO(out_nolock, rc);
380 } else if (!(mti->mti_flags & LDD_F_NO_PRIMNODE)) {
381 rc = mgs_check_failover_reg(mti);
383 GOTO(out_nolock, rc);
386 OBD_FAIL_TIMEOUT(OBD_FAIL_MGS_PAUSE_TARGET_REG, 10);
388 if (mti->mti_flags & LDD_F_WRITECONF) {
389 if (mti->mti_flags & LDD_F_SV_TYPE_MDT &&
390 mti->mti_stripe_index == 0) {
391 rc = mgs_erase_logs(tsi->tsi_env, mgs,
393 LCONSOLE_WARN("%s: Logs for fs %s were removed by user "
394 "request. All servers must be restarted "
395 "in order to regenerate the logs."
396 "\n", obd->obd_name, mti->mti_fsname);
397 } else if (mti->mti_flags &
398 (LDD_F_SV_TYPE_OST | LDD_F_SV_TYPE_MDT)) {
399 rc = mgs_erase_log(tsi->tsi_env, mgs, mti->mti_svname);
400 LCONSOLE_WARN("%s: Regenerating %s log by user "
402 obd->obd_name, mti->mti_svname);
404 mti->mti_flags |= LDD_F_UPDATE;
405 /* Erased logs means start from scratch. */
406 mti->mti_flags &= ~LDD_F_UPGRADE14;
408 GOTO(out_nolock, rc);
411 rc = mgs_find_or_make_fsdb(tsi->tsi_env, mgs, mti->mti_fsname, &fsdb);
413 CERROR("Can't get db for %s: %d\n", mti->mti_fsname, rc);
414 GOTO(out_nolock, rc);
418 * Log writing contention is handled by the fsdb_mutex.
420 * It should be alright if someone was reading while we were
421 * updating the logs - if we revoke at the end they will just update
422 * from where they left off.
425 if (mti->mti_flags & LDD_F_UPGRADE14) {
426 CERROR("Can't upgrade from 1.4 (%d)\n", rc);
430 if (mti->mti_flags & LDD_F_UPDATE) {
431 CDEBUG(D_MGS, "updating %s, index=%d\n", mti->mti_svname,
432 mti->mti_stripe_index);
434 /* create or update the target log
435 and update the client/mdt logs */
436 rc = mgs_write_log_target(tsi->tsi_env, mgs, mti, fsdb);
438 CERROR("Failed to write %s log (%d)\n",
439 mti->mti_svname, rc);
443 mti->mti_flags &= ~(LDD_F_VIRGIN | LDD_F_UPDATE |
444 LDD_F_NEED_INDEX | LDD_F_WRITECONF |
446 mti->mti_flags |= LDD_F_REWRITE_LDD;
450 mgs_revoke_lock(mgs, fsdb, CONFIG_T_CONFIG);
453 CDEBUG(D_MGS, "replying with %s, index=%d, rc=%d\n", mti->mti_svname,
454 mti->mti_stripe_index, rc);
455 /* An error flag is set in the mti reply rather than an error code */
457 mti->mti_flags |= LDD_F_ERROR;
459 /* send back the whole mti in the reply */
460 rep_mti = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
463 /* Flush logs to disk */
464 dt_sync(tsi->tsi_env, mgs->mgs_bottom);
468 /* Called whenever a target cleans up. */
469 static int mgs_target_del(struct tgt_session_info *tsi)
473 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_DEL);
478 static int mgs_config_read(struct tgt_session_info *tsi)
480 struct ptlrpc_request *req = tgt_ses_req(tsi);
481 struct mgs_config_body *body;
486 body = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_CONFIG_BODY);
488 DEBUG_REQ(D_HA, req, "no mgs_config_body");
489 RETURN(err_serious(-EFAULT));
492 switch (body->mcb_type) {
493 case CONFIG_T_RECOVER:
494 rc = mgs_get_ir_logs(req);
496 case CONFIG_T_CONFIG:
507 static int mgs_llog_open(struct tgt_session_info *tsi)
509 struct mgs_thread_info *mgi;
510 struct ptlrpc_request *req = tgt_ses_req(tsi);
516 rc = tgt_llog_open(tsi);
521 * For old clients there is no direct way of knowing which file system
522 * a client is operating at the MGS side. But we need to pick up those
523 * clients so that the MGS can mark the corresponding file system as
524 * non-IR capable because old clients are not ready to be notified.
526 * Therefore we attempt to detect the file systems name by hacking the
527 * llog operation which is currently used by the clients to fetch
528 * configuration logs. At present this is fine because this is the
529 * ONLY llog operation between mgc and the MGS.
531 * If extra llog operation are going to be added, this function needs
534 * When releases prior than 2.0 are not supported, the following code
537 mgi = mgs_env_info(tsi->tsi_env);
539 RETURN(PTR_ERR(mgi));
541 logname = req_capsule_client_get(tsi->tsi_pill, &RMF_NAME);
543 char *ptr = strchr(logname, '-');
544 int len = (ptr != NULL) ? (int)(ptr - logname) : 0;
546 if (ptr == NULL || len >= sizeof(mgi->mgi_fsname)) {
547 if (strcmp(logname, PARAMS_FILENAME) != 0)
548 LCONSOLE_WARN("%s: non-config logname "
550 tgt_name(tsi->tsi_tgt),
552 /* not error, this can be llog test name */
554 strncpy(mgi->mgi_fsname, logname, len);
555 mgi->mgi_fsname[len] = 0;
557 rc = mgs_fsc_attach(tsi->tsi_env, tsi->tsi_exp,
559 if (rc && rc != -EEXIST) {
560 LCONSOLE_WARN("%s: Unable to add client %s "
561 "to file system %s: %d\n",
562 tgt_name(tsi->tsi_tgt),
563 libcfs_nid2str(req->rq_peer.nid),
564 mgi->mgi_fsname, rc);
570 CERROR("%s: no logname in request\n", tgt_name(tsi->tsi_tgt));
576 static inline int mgs_init_export(struct obd_export *exp)
578 struct mgs_export_data *data = &exp->u.eu_mgs_data;
580 /* init mgs_export_data for fsc */
581 spin_lock_init(&data->med_lock);
582 INIT_LIST_HEAD(&data->med_clients);
584 spin_lock(&exp->exp_lock);
585 exp->exp_connecting = 1;
586 spin_unlock(&exp->exp_lock);
588 /* self-export doesn't need client data and ldlm initialization */
589 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
590 &exp->exp_client_uuid)))
592 return ldlm_init_export(exp);
595 static inline int mgs_destroy_export(struct obd_export *exp)
599 target_destroy_export(exp);
600 mgs_client_free(exp);
602 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
603 &exp->exp_client_uuid)))
606 ldlm_destroy_export(exp);
611 static int mgs_extract_fs_pool(char * arg, char *fsname, char *poolname)
616 for (ptr = arg; (*ptr != '\0') && (*ptr != '.'); ptr++ ) {
624 strcpy(poolname, ptr);
629 static int mgs_iocontrol_nodemap(const struct lu_env *env,
630 struct mgs_device *mgs,
631 struct obd_ioctl_data *data)
633 struct lustre_cfg *lcfg = NULL;
635 const char *nodemap_name = NULL;
636 const char *nidstr = NULL;
637 const char *client_idstr = NULL;
638 const char *idtype_str = NULL;
641 char name_buf[LUSTRE_NODEMAP_NAME_LENGTH + 1];
643 unsigned long client_id;
650 if (data->ioc_type != LUSTRE_CFG_TYPE) {
651 CERROR("%s: unknown cfg record type: %d\n",
652 mgs->mgs_obd->obd_name, data->ioc_type);
653 GOTO(out, rc = -EINVAL);
656 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
657 GOTO(out, rc = -E2BIG);
659 OBD_ALLOC(lcfg, data->ioc_plen1);
661 GOTO(out, rc = -ENOMEM);
663 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
664 GOTO(out_lcfg, rc = -EFAULT);
666 cmd = lcfg->lcfg_command;
669 case LCFG_NODEMAP_ACTIVATE:
670 if (lcfg->lcfg_bufcount != 2)
671 GOTO(out_lcfg, rc = -EINVAL);
672 param = lustre_cfg_string(lcfg, 1);
673 if (strcmp(param, "1") == 0)
678 case LCFG_NODEMAP_ADD:
679 case LCFG_NODEMAP_DEL:
680 if (lcfg->lcfg_bufcount != 2)
681 GOTO(out_lcfg, rc = -EINVAL);
682 nodemap_name = lustre_cfg_string(lcfg, 1);
683 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
685 case LCFG_NODEMAP_TEST_NID:
686 if (lcfg->lcfg_bufcount != 2)
687 GOTO(out_lcfg, rc = -EINVAL);
688 nidstr = lustre_cfg_string(lcfg, 1);
689 nid = libcfs_str2nid(nidstr);
690 nodemap_test_nid(nid, name_buf, sizeof(name_buf));
691 rc = copy_to_user(data->ioc_pbuf1, name_buf,
692 MIN(data->ioc_plen1, sizeof(name_buf)));
694 GOTO(out_lcfg, rc = -EFAULT);
696 case LCFG_NODEMAP_TEST_ID:
697 if (lcfg->lcfg_bufcount != 4)
698 GOTO(out_lcfg, rc = -EINVAL);
699 nidstr = lustre_cfg_string(lcfg, 1);
700 idtype_str = lustre_cfg_string(lcfg, 2);
701 client_idstr = lustre_cfg_string(lcfg, 3);
703 nid = libcfs_str2nid(nidstr);
704 if (strcmp(idtype_str, "uid") == 0)
705 idtype = NODEMAP_UID;
707 idtype = NODEMAP_GID;
709 rc = kstrtoul(client_idstr, 10, &client_id);
711 GOTO(out_lcfg, rc = -EINVAL);
713 fs_id = nodemap_test_id(nid, idtype, client_id);
715 if (data->ioc_plen1 < sizeof(fs_idstr))
716 GOTO(out_lcfg, rc = -EINVAL);
718 snprintf(fs_idstr, sizeof(fs_idstr), "%u", fs_id);
719 if (copy_to_user(data->ioc_pbuf1, fs_idstr,
720 sizeof(fs_idstr)) != 0)
721 GOTO(out_lcfg, rc = -EINVAL);
723 case LCFG_NODEMAP_ADD_RANGE:
724 case LCFG_NODEMAP_DEL_RANGE:
725 case LCFG_NODEMAP_ADD_UIDMAP:
726 case LCFG_NODEMAP_DEL_UIDMAP:
727 case LCFG_NODEMAP_ADD_GIDMAP:
728 case LCFG_NODEMAP_DEL_GIDMAP:
729 if (lcfg->lcfg_bufcount != 3)
730 GOTO(out_lcfg, rc = -EINVAL);
731 nodemap_name = lustre_cfg_string(lcfg, 1);
732 param = lustre_cfg_string(lcfg, 2);
733 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
735 case LCFG_NODEMAP_ADMIN:
736 case LCFG_NODEMAP_TRUSTED:
737 case LCFG_NODEMAP_SQUASH_UID:
738 case LCFG_NODEMAP_SQUASH_GID:
739 if (lcfg->lcfg_bufcount != 4)
740 GOTO(out_lcfg, rc = -EINVAL);
741 nodemap_name = lustre_cfg_string(lcfg, 1);
742 param = lustre_cfg_string(lcfg, 3);
743 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
750 CERROR("%s: OBD_IOC_NODEMAP command %X for %s: rc = %d\n",
751 mgs->mgs_obd->obd_name, lcfg->lcfg_command,
757 OBD_FREE(lcfg, data->ioc_plen1);
762 static int mgs_iocontrol_pool(const struct lu_env *env,
763 struct mgs_device *mgs,
764 struct obd_ioctl_data *data)
766 struct mgs_thread_info *mgi = mgs_env_info(env);
768 struct lustre_cfg *lcfg = NULL;
769 char *poolname = NULL;
772 OBD_ALLOC(poolname, LOV_MAXPOOLNAME + 1);
773 if (poolname == NULL)
776 if (data->ioc_type != LUSTRE_CFG_TYPE) {
777 CERROR("%s: unknown cfg record type: %d\n",
778 mgs->mgs_obd->obd_name, data->ioc_type);
779 GOTO(out_pool, rc = -EINVAL);
782 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
783 GOTO(out_pool, rc = -E2BIG);
785 OBD_ALLOC(lcfg, data->ioc_plen1);
787 GOTO(out_pool, rc = -ENOMEM);
789 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
790 GOTO(out_lcfg, rc = -EFAULT);
792 if (lcfg->lcfg_bufcount < 2)
793 GOTO(out_lcfg, rc = -EFAULT);
795 /* first arg is always <fsname>.<poolname> */
796 rc = mgs_extract_fs_pool(lustre_cfg_string(lcfg, 1), mgi->mgi_fsname,
801 switch (lcfg->lcfg_command) {
803 if (lcfg->lcfg_bufcount != 2)
804 GOTO(out_lcfg, rc = -EINVAL);
805 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_NEW, mgi->mgi_fsname,
809 if (lcfg->lcfg_bufcount != 3)
810 GOTO(out_lcfg, rc = -EINVAL);
811 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_ADD, mgi->mgi_fsname,
812 poolname, lustre_cfg_string(lcfg, 2));
815 if (lcfg->lcfg_bufcount != 3)
816 GOTO(out_lcfg, rc = -EINVAL);
817 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_REM, mgi->mgi_fsname,
818 poolname, lustre_cfg_string(lcfg, 2));
821 if (lcfg->lcfg_bufcount != 2)
822 GOTO(out_lcfg, rc = -EINVAL);
823 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_DEL, mgi->mgi_fsname,
831 CERROR("OBD_IOC_POOL err %d, cmd %X for pool %s.%s\n",
832 rc, lcfg->lcfg_command, mgi->mgi_fsname, poolname);
837 OBD_FREE(lcfg, data->ioc_plen1);
839 OBD_FREE(poolname, LOV_MAXPOOLNAME + 1);
843 /* from mdt_iocontrol */
844 static int mgs_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
845 void *karg, void *uarg)
847 struct mgs_device *mgs = exp2mgs_dev(exp);
848 struct obd_ioctl_data *data = karg;
853 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
855 rc = lu_env_init(&env, LCT_MG_THREAD);
861 case OBD_IOC_PARAM: {
862 struct mgs_thread_info *mgi = mgs_env_info(&env);
863 struct lustre_cfg *lcfg;
865 if (data->ioc_type != LUSTRE_CFG_TYPE) {
866 CERROR("%s: unknown cfg record type: %d\n",
867 mgs->mgs_obd->obd_name, data->ioc_type);
868 GOTO(out, rc = -EINVAL);
871 OBD_ALLOC(lcfg, data->ioc_plen1);
873 GOTO(out, rc = -ENOMEM);
874 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
875 GOTO(out_free, rc = -EFAULT);
877 if (lcfg->lcfg_bufcount < 1)
878 GOTO(out_free, rc = -EINVAL);
880 rc = mgs_setparam(&env, mgs, lcfg, mgi->mgi_fsname);
882 CERROR("%s: setparam err: rc = %d\n",
883 exp->exp_obd->obd_name, rc);
885 OBD_FREE(lcfg, data->ioc_plen1);
889 case OBD_IOC_REPLACE_NIDS: {
890 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
891 CERROR("No device name specified!\n");
896 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
897 CERROR("Device name is not NUL terminated!\n");
902 if (data->ioc_plen1 > MTI_NAME_MAXLEN) {
903 CERROR("Device name is too long\n");
908 if (!data->ioc_inllen2 || !data->ioc_inlbuf2) {
909 CERROR("No NIDs were specified!\n");
914 if (data->ioc_inlbuf2[data->ioc_inllen2 - 1] != 0) {
915 CERROR("NID list is not NUL terminated!\n");
920 /* replace nids in llog */
921 rc = mgs_replace_nids(&env, mgs, data->ioc_inlbuf1,
924 CERROR("%s: error replacing nids: rc = %d\n",
925 exp->exp_obd->obd_name, rc);
931 rc = mgs_iocontrol_pool(&env, mgs, data);
934 case OBD_IOC_NODEMAP:
935 rc = mgs_iocontrol_nodemap(&env, mgs, data);
938 case OBD_IOC_CATLOGLIST:
939 rc = mgs_list_logs(&env, mgs, data);
941 case OBD_IOC_LLOG_CANCEL:
942 case OBD_IOC_LLOG_REMOVE:
943 case OBD_IOC_LLOG_CHECK:
944 case OBD_IOC_LLOG_INFO:
945 case OBD_IOC_LLOG_PRINT: {
946 struct llog_ctxt *ctxt;
948 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
949 rc = llog_ioctl(&env, ctxt, cmd, data);
955 CERROR("%s: unknown command %#x\n",
956 mgs->mgs_obd->obd_name, cmd);
965 static int mgs_connect_to_osd(struct mgs_device *m, const char *nextdev)
967 struct obd_connect_data *data = NULL;
968 struct obd_device *obd;
976 obd = class_name2obd(nextdev);
978 CERROR("can't locate next device: %s\n", nextdev);
979 GOTO(out, rc = -ENOTCONN);
982 data->ocd_version = LUSTRE_VERSION_CODE;
984 rc = obd_connect(NULL, &m->mgs_bottom_exp, obd,
985 &obd->obd_uuid, data, NULL);
987 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
991 m->mgs_bottom = lu2dt_dev(m->mgs_bottom_exp->exp_obd->obd_lu_dev);
992 m->mgs_dt_dev.dd_lu_dev.ld_site = m->mgs_bottom->dd_lu_dev.ld_site;
993 LASSERT(m->mgs_dt_dev.dd_lu_dev.ld_site);
999 static struct tgt_handler mgs_mgs_handlers[] = {
1000 TGT_RPC_HANDLER(MGS_FIRST_OPC,
1001 0, MGS_CONNECT, mgs_connect,
1002 &RQF_CONNECT, LUSTRE_OBD_VERSION),
1003 TGT_RPC_HANDLER(MGS_FIRST_OPC,
1004 0, MGS_DISCONNECT, mgs_disconnect,
1005 &RQF_MDS_DISCONNECT, LUSTRE_OBD_VERSION),
1006 TGT_MGS_HDL_VAR(0, MGS_EXCEPTION, mgs_exception),
1007 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_SET_INFO, mgs_set_info),
1008 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_TARGET_REG, mgs_target_reg),
1009 TGT_MGS_HDL_VAR(0, MGS_TARGET_DEL, mgs_target_del),
1010 TGT_MGS_HDL (HABEO_REFERO, MGS_CONFIG_READ, mgs_config_read),
1013 static struct tgt_handler mgs_obd_handlers[] = {
1014 TGT_OBD_HDL(0, OBD_PING, tgt_obd_ping),
1017 static struct tgt_handler mgs_dlm_handlers[] = {
1018 [LDLM_ENQUEUE - LDLM_FIRST_OPC] = {
1019 .th_name = "LDLM_ENQUEUE",
1020 /* don't use th_fail_id for MGS to don't interfere with MDS tests.
1021 * * There are no tests for MGS with OBD_FAIL_LDLM_ENQUEUE_NET so it
1022 * * is safe. If such tests will be needed we have to distinguish
1023 * * MDS and MGS fail ids, e.g use OBD_FAIL_MGS_ENQUEUE_NET for MGS
1024 * * instead of common OBD_FAIL_LDLM_ENQUEUE_NET */
1026 .th_opc = LDLM_ENQUEUE,
1027 .th_flags = HABEO_CLAVIS,
1028 .th_act = tgt_enqueue,
1029 .th_fmt = &RQF_LDLM_ENQUEUE,
1030 .th_version = LUSTRE_DLM_VERSION,
1034 static struct tgt_handler mgs_llog_handlers[] = {
1035 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, mgs_llog_open),
1036 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1037 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1038 TGT_LLOG_HDL_VAR(0, LLOG_ORIGIN_HANDLE_CLOSE, tgt_llog_close),
1039 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1042 static struct tgt_opc_slice mgs_common_slice[] = {
1044 .tos_opc_start = MGS_FIRST_OPC,
1045 .tos_opc_end = MGS_LAST_OPC,
1046 .tos_hs = mgs_mgs_handlers
1049 .tos_opc_start = OBD_FIRST_OPC,
1050 .tos_opc_end = OBD_LAST_OPC,
1051 .tos_hs = mgs_obd_handlers
1054 .tos_opc_start = LDLM_FIRST_OPC,
1055 .tos_opc_end = LDLM_LAST_OPC,
1056 .tos_hs = mgs_dlm_handlers
1059 .tos_opc_start = LLOG_FIRST_OPC,
1060 .tos_opc_end = LLOG_LAST_OPC,
1061 .tos_hs = mgs_llog_handlers
1064 .tos_opc_start = SEC_FIRST_OPC,
1065 .tos_opc_end = SEC_LAST_OPC,
1066 .tos_hs = tgt_sec_ctx_handlers
1073 static int mgs_init0(const struct lu_env *env, struct mgs_device *mgs,
1074 struct lu_device_type *ldt, struct lustre_cfg *lcfg)
1076 struct ptlrpc_service_conf conf;
1077 struct obd_device *obd;
1078 struct lustre_mount_info *lmi;
1079 struct llog_ctxt *ctxt;
1080 struct fs_db *fsdb = NULL;
1081 struct fs_db *fsdb_srpc = NULL;
1086 lmi = server_get_mount(lustre_cfg_string(lcfg, 0));
1090 mgs->mgs_dt_dev.dd_lu_dev.ld_ops = &mgs_lu_ops;
1092 rc = mgs_connect_to_osd(mgs, lustre_cfg_string(lcfg, 3));
1096 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1099 mgs->mgs_obd->obd_lu_dev = &mgs->mgs_dt_dev.dd_lu_dev;
1101 obd->u.obt.obt_magic = OBT_MAGIC;
1102 obd->u.obt.obt_instance = 0;
1104 /* namespace for mgs llog */
1105 obd->obd_namespace = ldlm_namespace_new(obd ,"MGS",
1106 LDLM_NAMESPACE_SERVER,
1107 LDLM_NAMESPACE_MODEST,
1109 if (obd->obd_namespace == NULL)
1110 GOTO(err_ops, rc = -ENOMEM);
1112 /* No recovery for MGCs */
1113 obd->obd_replayable = 0;
1115 rc = tgt_init(env, &mgs->mgs_lut, obd, mgs->mgs_bottom,
1116 mgs_common_slice, OBD_FAIL_MGS_ALL_REQUEST_NET,
1117 OBD_FAIL_MGS_ALL_REPLY_NET);
1121 rc = mgs_fs_setup(env, mgs);
1123 CERROR("%s: MGS filesystem method init failed: rc = %d\n",
1128 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT,
1129 obd, &llog_osd_ops);
1133 /* XXX: we need this trick till N:1 stack is supported
1134 * set "current" directory for named llogs */
1135 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1137 ctxt->loc_dir = mgs->mgs_configs_dir;
1138 llog_ctxt_put(ctxt);
1140 /* Internal mgs setup */
1141 mgs_init_fsdb_list(mgs);
1142 mutex_init(&mgs->mgs_mutex);
1143 mgs->mgs_start_time = cfs_time_current_sec();
1144 spin_lock_init(&mgs->mgs_lock);
1145 mutex_init(&mgs->mgs_health_mutex);
1147 rc = lproc_mgs_setup(mgs, lustre_cfg_string(lcfg, 3));
1149 CERROR("%s: cannot initialize proc entry: rc = %d\n",
1154 /* Setup params fsdb and log, so that other servers can make a local
1155 * copy successfully when they are mounted. See LU-4783 */
1156 rc = mgs_params_fsdb_setup(env, mgs, fsdb);
1158 /* params fsdb and log can be setup later */
1159 CERROR("%s: %s fsdb and log setup failed: rc = %d\n",
1160 obd->obd_name, PARAMS_FILENAME, rc);
1162 /* Setup _mgs fsdb, useful for srpc */
1163 mgs__mgs_fsdb_setup(env, mgs, fsdb_srpc);
1165 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1166 "mgs_ldlm_client", &obd->obd_ldlm_client);
1168 conf = (typeof(conf)) {
1169 .psc_name = LUSTRE_MGS_NAME,
1170 .psc_watchdog_factor = MGS_SERVICE_WATCHDOG_FACTOR,
1172 .bc_nbufs = MGS_NBUFS,
1173 .bc_buf_size = MGS_BUFSIZE,
1174 .bc_req_max_size = MGS_MAXREQSIZE,
1175 .bc_rep_max_size = MGS_MAXREPSIZE,
1176 .bc_req_portal = MGS_REQUEST_PORTAL,
1177 .bc_rep_portal = MGC_REPLY_PORTAL,
1180 .tc_thr_name = "ll_mgs",
1181 .tc_nthrs_init = MGS_NTHRS_INIT,
1182 .tc_nthrs_max = MGS_NTHRS_MAX,
1183 .tc_ctx_tags = LCT_MG_THREAD,
1186 .so_req_handler = tgt_request_handle,
1187 .so_req_printer = target_print_req,
1191 /* Start the service threads */
1192 mgs->mgs_service = ptlrpc_register_service(&conf, obd->obd_proc_entry);
1193 if (IS_ERR(mgs->mgs_service)) {
1194 rc = PTR_ERR(mgs->mgs_service);
1195 CERROR("failed to start mgs service: %d\n", rc);
1196 mgs->mgs_service = NULL;
1197 GOTO(err_lproc, rc);
1200 ping_evictor_start();
1202 CDEBUG(D_INFO, "MGS %s started\n", obd->obd_name);
1204 /* device stack is not yet fully setup to keep no objects behind */
1205 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1208 mgs_params_fsdb_cleanup(env, mgs);
1209 lproc_mgs_cleanup(mgs);
1211 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1213 ctxt->loc_dir = NULL;
1214 llog_cleanup(env, ctxt);
1217 tgt_fini(env, &mgs->mgs_lut);
1219 /* No extra cleanup needed for llog_init_commit_thread() */
1220 mgs_fs_cleanup(env, mgs);
1222 ldlm_namespace_free(obd->obd_namespace, NULL, 0);
1223 obd->obd_namespace = NULL;
1225 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1226 if (!cfs_hash_is_empty(mgs2lu_dev(mgs)->ld_site->ls_obj_hash)) {
1227 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1228 lu_site_print(env, mgs2lu_dev(mgs)->ld_site, &msgdata,
1231 obd_disconnect(mgs->mgs_bottom_exp);
1234 server_put_mount(lustre_cfg_string(lcfg, 0), true);
1238 static struct lu_device *mgs_device_free(const struct lu_env *env,
1239 struct lu_device *lu)
1241 struct mgs_device *mgs = lu2mgs_dev(lu);
1244 dt_device_fini(&mgs->mgs_dt_dev);
1249 static int mgs_process_config(const struct lu_env *env,
1250 struct lu_device *dev,
1251 struct lustre_cfg *lcfg)
1257 static int mgs_object_init(const struct lu_env *env, struct lu_object *o,
1258 const struct lu_object_conf *unused)
1260 struct mgs_device *d = lu2mgs_dev(o->lo_dev);
1261 struct lu_device *under;
1262 struct lu_object *below;
1266 /* do no set .do_ops as mgs calls to bottom osd directly */
1268 CDEBUG(D_INFO, "object init, fid = "DFID"\n",
1269 PFID(lu_object_fid(o)));
1271 under = &d->mgs_bottom->dd_lu_dev;
1272 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
1274 lu_object_add(o, below);
1281 static void mgs_object_free(const struct lu_env *env, struct lu_object *o)
1283 struct mgs_object *obj = lu2mgs_obj(o);
1284 struct lu_object_header *h = o->lo_header;
1286 dt_object_fini(&obj->mgo_obj);
1287 lu_object_header_fini(h);
1291 static int mgs_object_print(const struct lu_env *env, void *cookie,
1292 lu_printer_t p, const struct lu_object *l)
1294 const struct mgs_object *o = lu2mgs_obj((struct lu_object *) l);
1296 return (*p)(env, cookie, LUSTRE_MGS_NAME"-object@%p", o);
1299 static struct lu_object_operations mgs_lu_obj_ops = {
1300 .loo_object_init = mgs_object_init,
1301 .loo_object_free = mgs_object_free,
1302 .loo_object_print = mgs_object_print,
1305 static struct lu_object *mgs_object_alloc(const struct lu_env *env,
1306 const struct lu_object_header *hdr,
1307 struct lu_device *d)
1309 struct lu_object_header *h;
1310 struct mgs_object *o;
1311 struct lu_object *l;
1313 LASSERT(hdr == NULL);
1317 l = &o->mgo_obj.do_lu;
1320 lu_object_header_init(h);
1321 dt_object_init(&o->mgo_obj, h, d);
1322 lu_object_add_top(h, l);
1324 l->lo_ops = &mgs_lu_obj_ops;
1332 const struct lu_device_operations mgs_lu_ops = {
1333 .ldo_object_alloc = mgs_object_alloc,
1334 .ldo_process_config = mgs_process_config,
1337 static struct lu_device *mgs_device_alloc(const struct lu_env *env,
1338 struct lu_device_type *type,
1339 struct lustre_cfg *lcfg)
1341 struct mgs_device *mgs;
1342 struct lu_device *ludev;
1346 ludev = ERR_PTR(-ENOMEM);
1350 ludev = mgs2lu_dev(mgs);
1351 dt_device_init(&mgs->mgs_dt_dev, type);
1352 rc = mgs_init0(env, mgs, type, lcfg);
1354 mgs_device_free(env, ludev);
1355 ludev = ERR_PTR(rc);
1361 static struct lu_device *mgs_device_fini(const struct lu_env *env,
1362 struct lu_device *d)
1364 struct mgs_device *mgs = lu2mgs_dev(d);
1365 struct obd_device *obd = mgs->mgs_obd;
1366 struct llog_ctxt *ctxt;
1370 LASSERT(mgs->mgs_bottom);
1372 class_disconnect_exports(obd);
1374 ping_evictor_stop();
1376 mutex_lock(&mgs->mgs_health_mutex);
1377 ptlrpc_unregister_service(mgs->mgs_service);
1378 mutex_unlock(&mgs->mgs_health_mutex);
1380 mgs_params_fsdb_cleanup(env, mgs);
1381 mgs_cleanup_fsdb_list(mgs);
1383 ldlm_namespace_free_prior(obd->obd_namespace, NULL, 1);
1384 obd_exports_barrier(obd);
1385 obd_zombie_barrier();
1387 tgt_fini(env, &mgs->mgs_lut);
1388 lproc_mgs_cleanup(mgs);
1390 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1392 ctxt->loc_dir = NULL;
1393 llog_cleanup(env, ctxt);
1396 mgs_fs_cleanup(env, mgs);
1398 ldlm_namespace_free_post(obd->obd_namespace);
1399 obd->obd_namespace = NULL;
1401 lu_site_purge(env, d->ld_site, ~0);
1402 if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
1403 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1404 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
1407 LASSERT(mgs->mgs_bottom_exp);
1408 obd_disconnect(mgs->mgs_bottom_exp);
1410 server_put_mount(obd->obd_name, true);
1415 /* context key constructor/destructor: mgs_key_init, mgs_key_fini */
1416 LU_KEY_INIT_FINI(mgs, struct mgs_thread_info);
1418 LU_TYPE_INIT_FINI(mgs, &mgs_thread_key);
1420 LU_CONTEXT_KEY_DEFINE(mgs, LCT_MG_THREAD);
1422 static struct lu_device_type_operations mgs_device_type_ops = {
1423 .ldto_init = mgs_type_init,
1424 .ldto_fini = mgs_type_fini,
1426 .ldto_start = mgs_type_start,
1427 .ldto_stop = mgs_type_stop,
1429 .ldto_device_alloc = mgs_device_alloc,
1430 .ldto_device_free = mgs_device_free,
1432 .ldto_device_fini = mgs_device_fini
1435 static struct lu_device_type mgs_device_type = {
1436 .ldt_tags = LU_DEVICE_DT,
1437 .ldt_name = LUSTRE_MGS_NAME,
1438 .ldt_ops = &mgs_device_type_ops,
1439 .ldt_ctx_tags = LCT_MG_THREAD
1442 static int mgs_obd_connect(const struct lu_env *env, struct obd_export **exp,
1443 struct obd_device *obd, struct obd_uuid *cluuid,
1444 struct obd_connect_data *data, void *localdata)
1446 struct obd_export *lexp;
1447 struct lustre_handle conn = { 0 };
1452 if (exp == NULL || obd == NULL || cluuid == NULL)
1455 rc = class_connect(&conn, obd, cluuid);
1459 lexp = class_conn2export(&conn);
1464 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1465 data->ocd_version = LUSTRE_VERSION_CODE;
1466 lexp->exp_connect_data = *data;
1469 tgt_counter_incr(lexp, LPROC_MGS_CONNECT);
1471 rc = mgs_export_stats_init(obd, lexp, localdata);
1473 class_disconnect(lexp);
1480 static int mgs_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
1481 struct obd_device *obd, struct obd_uuid *cluuid,
1482 struct obd_connect_data *data, void *localdata)
1486 if (exp == NULL || obd == NULL || cluuid == NULL)
1489 tgt_counter_incr(exp, LPROC_MGS_CONNECT);
1492 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1493 data->ocd_version = LUSTRE_VERSION_CODE;
1494 exp->exp_connect_data = *data;
1497 RETURN(mgs_export_stats_init(obd, exp, localdata));
1500 static int mgs_obd_disconnect(struct obd_export *exp)
1508 mgs_fsc_cleanup(exp);
1510 class_export_get(exp);
1511 tgt_counter_incr(exp, LPROC_MGS_DISCONNECT);
1513 rc = server_disconnect_export(exp);
1514 class_export_put(exp);
1518 static int mgs_health_check(const struct lu_env *env, struct obd_device *obd)
1520 struct mgs_device *mgs = lu2mgs_dev(obd->obd_lu_dev);
1523 mutex_lock(&mgs->mgs_health_mutex);
1524 rc |= ptlrpc_service_health_check(mgs->mgs_service);
1525 mutex_unlock(&mgs->mgs_health_mutex);
1527 return rc != 0 ? 1 : 0;
1530 /* use obd ops to offer management infrastructure */
1531 static struct obd_ops mgs_obd_device_ops = {
1532 .o_owner = THIS_MODULE,
1533 .o_connect = mgs_obd_connect,
1534 .o_reconnect = mgs_obd_reconnect,
1535 .o_disconnect = mgs_obd_disconnect,
1536 .o_init_export = mgs_init_export,
1537 .o_destroy_export = mgs_destroy_export,
1538 .o_iocontrol = mgs_iocontrol,
1539 .o_health_check = mgs_health_check,
1542 static int __init mgs_init(void)
1544 return class_register_type(&mgs_obd_device_ops, NULL, true, NULL,
1545 LUSTRE_MGS_NAME, &mgs_device_type);
1548 static void /*__exit*/ mgs_exit(void)
1550 class_unregister_type(LUSTRE_MGS_NAME);
1553 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1554 MODULE_DESCRIPTION("Lustre Management Server (MGS)");
1555 MODULE_VERSION(LUSTRE_VERSION_STRING);
1556 MODULE_LICENSE("GPL");
1558 module_init(mgs_init);
1559 module_exit(mgs_exit);