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, 2013, 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);
119 rc = mgs_setparam(tsi->tsi_env, exp2mgs_dev(tsi->tsi_exp), lcfg,
122 LCONSOLE_WARN("%s: Unable to set parameter %s for %s: %d\n",
123 tgt_name(tsi->tsi_tgt), msp->mgs_param,
124 mgi->mgi_fsname, rc);
128 /* send back the whole msp in the reply */
129 rep_msp = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
133 lustre_cfg_free(lcfg);
143 static int mgs_completion_ast_generic(struct ldlm_lock *lock, __u64 flags,
144 void *cbdata, enum ast_type type)
148 if (!(flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
149 LDLM_FL_BLOCK_CONV))) {
152 /* l_ast_data is used as a marker to avoid cancel ldlm lock
153 * twice. See LU-2317. */
154 lock_res_and_lock(lock);
155 fsdb = (struct fs_db *)lock->l_ast_data;
156 lock->l_ast_data = NULL;
157 unlock_res_and_lock(lock);
160 struct lustre_handle lockh;
164 /* clear the bit before lock put */
165 clear_bit(FSDB_REVOKING_LOCK,
169 clear_bit(FSDB_REVOKING_PARAMS,
173 mgs_ir_notify_complete(fsdb);
179 ldlm_lock2handle(lock, &lockh);
180 ldlm_lock_decref_and_cancel(&lockh, LCK_EX);
184 RETURN(ldlm_completion_ast(lock, flags, cbdata));
187 static int mgs_completion_ast_config(struct ldlm_lock *lock, __u64 flags,
190 return mgs_completion_ast_generic(lock, flags, cbdata, AST_CONFIG);
193 static int mgs_completion_ast_params(struct ldlm_lock *lock, __u64 flags,
196 return mgs_completion_ast_generic(lock, flags, cbdata, AST_PARAMS);
199 static int mgs_completion_ast_ir(struct ldlm_lock *lock, __u64 flags,
202 return mgs_completion_ast_generic(lock, flags, cbdata, AST_IR);
205 void mgs_revoke_lock(struct mgs_device *mgs, struct fs_db *fsdb, int type)
207 ldlm_completion_callback cp = NULL;
208 struct lustre_handle lockh = { 0 };
209 struct ldlm_res_id res_id;
210 __u64 flags = LDLM_FL_ATOMIC_CB;
214 LASSERT(fsdb->fsdb_name[0] != '\0');
215 rc = mgc_fsname2resid(fsdb->fsdb_name, &res_id, type);
218 case CONFIG_T_CONFIG:
219 cp = mgs_completion_ast_config;
220 if (test_and_set_bit(FSDB_REVOKING_LOCK, &fsdb->fsdb_flags))
223 case CONFIG_T_PARAMS:
224 cp = mgs_completion_ast_params;
225 if (test_and_set_bit(FSDB_REVOKING_PARAMS, &fsdb->fsdb_flags))
228 case CONFIG_T_RECOVER:
229 cp = mgs_completion_ast_ir;
236 rc = ldlm_cli_enqueue_local(mgs->mgs_obd->obd_namespace,
237 &res_id, LDLM_PLAIN, NULL, LCK_EX,
238 &flags, ldlm_blocking_ast, cp,
239 NULL, fsdb, 0, LVB_T_NONE, NULL,
241 if (rc != ELDLM_OK) {
242 CERROR("can't take cfg lock for "LPX64"/"LPX64"(%d)\n",
243 le64_to_cpu(res_id.name[0]),
244 le64_to_cpu(res_id.name[1]), rc);
246 if (type == CONFIG_T_CONFIG)
247 clear_bit(FSDB_REVOKING_LOCK,
250 if (type == CONFIG_T_PARAMS)
251 clear_bit(FSDB_REVOKING_PARAMS,
254 /* lock has been cancelled in completion_ast. */
263 static int mgs_check_target(const struct lu_env *env,
264 struct mgs_device *mgs,
265 struct mgs_target_info *mti)
270 rc = mgs_check_index(env, mgs, mti);
272 LCONSOLE_ERROR_MSG(0x13b, "%s claims to have registered, but "
273 "this MGS does not know about it, preventing "
274 "registration.\n", mti->mti_svname);
276 } else if (rc == -1) {
277 LCONSOLE_ERROR_MSG(0x13c, "Client log %s-client has "
278 "disappeared! Regenerating all logs.\n",
280 mti->mti_flags |= LDD_F_WRITECONF;
283 /* Index is correctly marked as used */
285 /* If the logs don't contain the mti_nids then add
286 them as failover nids */
287 rc = mgs_check_failnid(env, mgs, mti);
293 /* Ensure this is not a failover node that is connecting first*/
294 static int mgs_check_failover_reg(struct mgs_target_info *mti)
300 ptr = mti->mti_params;
301 while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
302 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
303 for (i = 0; i < mti->mti_nid_count; i++) {
304 if (nid == mti->mti_nids[i]) {
305 LCONSOLE_WARN("Denying initial registra"
306 "tion attempt from nid %s"
307 ", specified as failover"
308 "\n",libcfs_nid2str(nid));
309 return -EADDRNOTAVAIL;
317 /* Called whenever a target starts up. Flags indicate first connect, etc. */
318 static int mgs_target_reg(struct tgt_session_info *tsi)
320 struct obd_device *obd = tsi->tsi_exp->exp_obd;
321 struct mgs_device *mgs = exp2mgs_dev(tsi->tsi_exp);
322 struct mgs_target_info *mti, *rep_mti;
329 rc = lu_env_refill((struct lu_env *)tsi->tsi_env);
331 return err_serious(rc);
333 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_REG);
335 mti = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
337 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no mgs_send_param");
338 RETURN(err_serious(-EFAULT));
341 if (OCD_HAS_FLAG(&tgt_ses_req(tsi)->rq_export->exp_connect_data,
343 opc = mti->mti_flags & LDD_F_OPC_MASK;
347 if (opc == LDD_F_OPC_READY) {
348 CDEBUG(D_MGS, "fs: %s index: %d is ready to reconnect.\n",
349 mti->mti_fsname, mti->mti_stripe_index);
350 rc = mgs_ir_update(tsi->tsi_env, mgs, mti);
352 LASSERT(!(mti->mti_flags & LDD_F_IR_CAPABLE));
353 CERROR("Update IR return with %d(ignore and IR "
356 GOTO(out_nolock, rc);
359 /* Do not support unregistering right now. */
360 if (opc != LDD_F_OPC_REG)
361 GOTO(out_nolock, rc = -EINVAL);
363 CDEBUG(D_MGS, "fs: %s index: %d is registered to MGS.\n",
364 mti->mti_fsname, mti->mti_stripe_index);
366 if (mti->mti_flags & LDD_F_NEED_INDEX)
367 mti->mti_flags |= LDD_F_WRITECONF;
369 if (!(mti->mti_flags & (LDD_F_WRITECONF | LDD_F_UPGRADE14 |
371 /* We're just here as a startup ping. */
372 CDEBUG(D_MGS, "Server %s is running on %s\n",
373 mti->mti_svname, obd_export_nid2str(tsi->tsi_exp));
374 rc = mgs_check_target(tsi->tsi_env, mgs, mti);
375 /* above will set appropriate mti flags */
377 /* Nothing wrong, or fatal error */
378 GOTO(out_nolock, rc);
379 } else if (!(mti->mti_flags & LDD_F_NO_PRIMNODE)) {
380 rc = mgs_check_failover_reg(mti);
382 GOTO(out_nolock, rc);
385 OBD_FAIL_TIMEOUT(OBD_FAIL_MGS_PAUSE_TARGET_REG, 10);
387 if (mti->mti_flags & LDD_F_WRITECONF) {
388 if (mti->mti_flags & LDD_F_SV_TYPE_MDT &&
389 mti->mti_stripe_index == 0) {
390 rc = mgs_erase_logs(tsi->tsi_env, mgs,
392 LCONSOLE_WARN("%s: Logs for fs %s were removed by user "
393 "request. All servers must be restarted "
394 "in order to regenerate the logs."
395 "\n", obd->obd_name, mti->mti_fsname);
396 } else if (mti->mti_flags &
397 (LDD_F_SV_TYPE_OST | LDD_F_SV_TYPE_MDT)) {
398 rc = mgs_erase_log(tsi->tsi_env, mgs, mti->mti_svname);
399 LCONSOLE_WARN("%s: Regenerating %s log by user "
401 obd->obd_name, mti->mti_svname);
403 mti->mti_flags |= LDD_F_UPDATE;
404 /* Erased logs means start from scratch. */
405 mti->mti_flags &= ~LDD_F_UPGRADE14;
407 GOTO(out_nolock, rc);
410 rc = mgs_find_or_make_fsdb(tsi->tsi_env, mgs, mti->mti_fsname, &fsdb);
412 CERROR("Can't get db for %s: %d\n", mti->mti_fsname, rc);
413 GOTO(out_nolock, rc);
417 * Log writing contention is handled by the fsdb_mutex.
419 * It should be alright if someone was reading while we were
420 * updating the logs - if we revoke at the end they will just update
421 * from where they left off.
424 if (mti->mti_flags & LDD_F_UPGRADE14) {
425 CERROR("Can't upgrade from 1.4 (%d)\n", rc);
429 if (mti->mti_flags & LDD_F_UPDATE) {
430 CDEBUG(D_MGS, "updating %s, index=%d\n", mti->mti_svname,
431 mti->mti_stripe_index);
433 /* create or update the target log
434 and update the client/mdt logs */
435 rc = mgs_write_log_target(tsi->tsi_env, mgs, mti, fsdb);
437 CERROR("Failed to write %s log (%d)\n",
438 mti->mti_svname, rc);
442 mti->mti_flags &= ~(LDD_F_VIRGIN | LDD_F_UPDATE |
443 LDD_F_NEED_INDEX | LDD_F_WRITECONF |
445 mti->mti_flags |= LDD_F_REWRITE_LDD;
449 mgs_revoke_lock(mgs, fsdb, CONFIG_T_CONFIG);
452 CDEBUG(D_MGS, "replying with %s, index=%d, rc=%d\n", mti->mti_svname,
453 mti->mti_stripe_index, rc);
454 /* An error flag is set in the mti reply rather than an error code */
456 mti->mti_flags |= LDD_F_ERROR;
458 /* send back the whole mti in the reply */
459 rep_mti = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
462 /* Flush logs to disk */
463 dt_sync(tsi->tsi_env, mgs->mgs_bottom);
467 /* Called whenever a target cleans up. */
468 static int mgs_target_del(struct tgt_session_info *tsi)
472 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_DEL);
477 static int mgs_config_read(struct tgt_session_info *tsi)
479 struct ptlrpc_request *req = tgt_ses_req(tsi);
480 struct mgs_config_body *body;
485 body = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_CONFIG_BODY);
487 DEBUG_REQ(D_HA, req, "no mgs_config_body");
488 RETURN(err_serious(-EFAULT));
491 switch (body->mcb_type) {
492 case CONFIG_T_RECOVER:
493 rc = mgs_get_ir_logs(req);
495 case CONFIG_T_CONFIG:
506 static int mgs_llog_open(struct tgt_session_info *tsi)
508 struct mgs_thread_info *mgi;
509 struct ptlrpc_request *req = tgt_ses_req(tsi);
515 rc = tgt_llog_open(tsi);
520 * For old clients there is no direct way of knowing which file system
521 * a client is operating at the MGS side. But we need to pick up those
522 * clients so that the MGS can mark the corresponding file system as
523 * non-IR capable because old clients are not ready to be notified.
525 * Therefore we attempt to detect the file systems name by hacking the
526 * llog operation which is currently used by the clients to fetch
527 * configuration logs. At present this is fine because this is the
528 * ONLY llog operation between mgc and the MGS.
530 * If extra llog operation are going to be added, this function needs
533 * When releases prior than 2.0 are not supported, the following code
536 mgi = mgs_env_info(tsi->tsi_env);
538 RETURN(PTR_ERR(mgi));
540 logname = req_capsule_client_get(tsi->tsi_pill, &RMF_NAME);
542 char *ptr = strchr(logname, '-');
543 int len = (ptr != NULL) ? (int)(ptr - logname) : 0;
545 if (ptr == NULL || len >= sizeof(mgi->mgi_fsname)) {
546 if (strcmp(logname, PARAMS_FILENAME) != 0)
547 LCONSOLE_WARN("%s: non-config logname "
549 tgt_name(tsi->tsi_tgt),
551 /* not error, this can be llog test name */
553 strncpy(mgi->mgi_fsname, logname, len);
554 mgi->mgi_fsname[len] = 0;
556 rc = mgs_fsc_attach(tsi->tsi_env, tsi->tsi_exp,
558 if (rc && rc != -EEXIST) {
559 LCONSOLE_WARN("%s: Unable to add client %s "
560 "to file system %s: %d\n",
561 tgt_name(tsi->tsi_tgt),
562 libcfs_nid2str(req->rq_peer.nid),
563 mgi->mgi_fsname, rc);
569 CERROR("%s: no logname in request\n", tgt_name(tsi->tsi_tgt));
575 static inline int mgs_init_export(struct obd_export *exp)
577 struct mgs_export_data *data = &exp->u.eu_mgs_data;
579 /* init mgs_export_data for fsc */
580 spin_lock_init(&data->med_lock);
581 INIT_LIST_HEAD(&data->med_clients);
583 spin_lock(&exp->exp_lock);
584 exp->exp_connecting = 1;
585 spin_unlock(&exp->exp_lock);
587 /* self-export doesn't need client data and ldlm initialization */
588 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
589 &exp->exp_client_uuid)))
591 return ldlm_init_export(exp);
594 static inline int mgs_destroy_export(struct obd_export *exp)
598 target_destroy_export(exp);
599 mgs_client_free(exp);
601 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
602 &exp->exp_client_uuid)))
605 ldlm_destroy_export(exp);
610 static int mgs_extract_fs_pool(char * arg, char *fsname, char *poolname)
615 for (ptr = arg; (*ptr != '\0') && (*ptr != '.'); ptr++ ) {
623 strcpy(poolname, ptr);
628 static int mgs_iocontrol_nodemap(const struct lu_env *env,
629 struct mgs_device *mgs,
630 struct obd_ioctl_data *data)
632 struct lustre_cfg *lcfg = NULL;
633 struct lu_nodemap *nodemap;
635 const char *nodemap_name = NULL;
636 const char *nidstr = NULL;
637 const char *client_idstr = NULL;
638 const char *idtype_str = NULL;
649 if (data->ioc_type != LUSTRE_CFG_TYPE) {
650 CERROR("%s: unknown cfg record type: %d\n",
651 mgs->mgs_obd->obd_name, data->ioc_type);
652 GOTO(out, rc = -EINVAL);
655 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
656 GOTO(out, rc = -E2BIG);
658 OBD_ALLOC(lcfg, data->ioc_plen1);
660 GOTO(out, rc = -ENOMEM);
662 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
663 GOTO(out_lcfg, rc = -EFAULT);
665 cmd = lcfg->lcfg_command;
668 case LCFG_NODEMAP_ACTIVATE:
669 if (lcfg->lcfg_bufcount != 2)
670 GOTO(out_lcfg, rc = -EINVAL);
671 param = lustre_cfg_string(lcfg, 1);
672 if (strcmp(param, "1") == 0)
677 case LCFG_NODEMAP_ADD:
678 case LCFG_NODEMAP_DEL:
679 if (lcfg->lcfg_bufcount != 2)
680 GOTO(out_lcfg, rc = -EINVAL);
681 nodemap_name = lustre_cfg_string(lcfg, 1);
682 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
684 case LCFG_NODEMAP_TEST_NID:
685 if (lcfg->lcfg_bufcount != 2)
686 GOTO(out_lcfg, rc = -EINVAL);
687 nidstr = lustre_cfg_string(lcfg, 1);
688 nid = libcfs_str2nid(nidstr);
689 nodemap = nodemap_classify_nid(nid);
690 memset(data->ioc_pbuf1, 0, data->ioc_plen1);
691 if (copy_to_user(data->ioc_pbuf1, nodemap->nm_name,
692 strlen(nodemap->nm_name)) != 0)
693 GOTO(out_lcfg, rc = -EFAULT);
695 case LCFG_NODEMAP_TEST_ID:
696 if (lcfg->lcfg_bufcount != 4)
697 GOTO(out_lcfg, rc = -EINVAL);
698 nidstr = lustre_cfg_string(lcfg, 1);
699 idtype_str = lustre_cfg_string(lcfg, 2);
700 client_idstr = lustre_cfg_string(lcfg, 3);
702 nid = libcfs_str2nid(nidstr);
703 nodemap = nodemap_classify_nid(nid);
704 client_id = simple_strtoul(client_idstr, NULL, 10);
706 if (strcmp(idtype_str, "uid") == 0)
707 idtype = NODEMAP_UID;
709 idtype = NODEMAP_GID;
711 fs_id = nodemap_map_id(nodemap, idtype, NODEMAP_CLIENT_TO_FS,
714 if (data->ioc_plen1 < sizeof(fs_idstr))
715 GOTO(out_lcfg, rc = -EINVAL);
717 snprintf(fs_idstr, sizeof(fs_idstr), "%u", fs_id);
718 if (copy_to_user(data->ioc_pbuf1, fs_idstr,
719 sizeof(fs_idstr)) != 0)
720 GOTO(out_lcfg, rc = -EINVAL);
722 case LCFG_NODEMAP_ADD_RANGE:
723 case LCFG_NODEMAP_DEL_RANGE:
724 case LCFG_NODEMAP_ADD_UIDMAP:
725 case LCFG_NODEMAP_DEL_UIDMAP:
726 case LCFG_NODEMAP_ADD_GIDMAP:
727 case LCFG_NODEMAP_DEL_GIDMAP:
728 if (lcfg->lcfg_bufcount != 3)
729 GOTO(out_lcfg, rc = -EINVAL);
730 nodemap_name = lustre_cfg_string(lcfg, 1);
731 param = lustre_cfg_string(lcfg, 2);
732 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
734 case LCFG_NODEMAP_ADMIN:
735 case LCFG_NODEMAP_TRUSTED:
736 case LCFG_NODEMAP_SQUASH_UID:
737 case LCFG_NODEMAP_SQUASH_GID:
738 if (lcfg->lcfg_bufcount != 4)
739 GOTO(out_lcfg, rc = -EINVAL);
740 nodemap_name = lustre_cfg_string(lcfg, 1);
741 param = lustre_cfg_string(lcfg, 3);
742 rc = mgs_nodemap_cmd(env, mgs, cmd, nodemap_name, param);
749 CERROR("%s: OBD_IOC_NODEMAP command %X for %s: rc = %d\n",
750 mgs->mgs_obd->obd_name, lcfg->lcfg_command,
756 OBD_FREE(lcfg, data->ioc_plen1);
761 static int mgs_iocontrol_pool(const struct lu_env *env,
762 struct mgs_device *mgs,
763 struct obd_ioctl_data *data)
765 struct mgs_thread_info *mgi = mgs_env_info(env);
767 struct lustre_cfg *lcfg = NULL;
768 char *poolname = NULL;
771 OBD_ALLOC(poolname, LOV_MAXPOOLNAME + 1);
772 if (poolname == NULL)
775 if (data->ioc_type != LUSTRE_CFG_TYPE) {
776 CERROR("%s: unknown cfg record type: %d\n",
777 mgs->mgs_obd->obd_name, data->ioc_type);
778 GOTO(out_pool, rc = -EINVAL);
781 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
782 GOTO(out_pool, rc = -E2BIG);
784 OBD_ALLOC(lcfg, data->ioc_plen1);
786 GOTO(out_pool, rc = -ENOMEM);
788 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
789 GOTO(out_lcfg, rc = -EFAULT);
791 if (lcfg->lcfg_bufcount < 2)
792 GOTO(out_lcfg, rc = -EFAULT);
794 /* first arg is always <fsname>.<poolname> */
795 rc = mgs_extract_fs_pool(lustre_cfg_string(lcfg, 1), mgi->mgi_fsname,
800 switch (lcfg->lcfg_command) {
802 if (lcfg->lcfg_bufcount != 2)
803 GOTO(out_lcfg, rc = -EINVAL);
804 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_NEW, mgi->mgi_fsname,
808 if (lcfg->lcfg_bufcount != 3)
809 GOTO(out_lcfg, rc = -EINVAL);
810 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_ADD, mgi->mgi_fsname,
811 poolname, lustre_cfg_string(lcfg, 2));
814 if (lcfg->lcfg_bufcount != 3)
815 GOTO(out_lcfg, rc = -EINVAL);
816 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_REM, mgi->mgi_fsname,
817 poolname, lustre_cfg_string(lcfg, 2));
820 if (lcfg->lcfg_bufcount != 2)
821 GOTO(out_lcfg, rc = -EINVAL);
822 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_DEL, mgi->mgi_fsname,
830 CERROR("OBD_IOC_POOL err %d, cmd %X for pool %s.%s\n",
831 rc, lcfg->lcfg_command, mgi->mgi_fsname, poolname);
836 OBD_FREE(lcfg, data->ioc_plen1);
838 OBD_FREE(poolname, LOV_MAXPOOLNAME + 1);
842 /* from mdt_iocontrol */
843 int mgs_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
844 void *karg, void *uarg)
846 struct mgs_device *mgs = exp2mgs_dev(exp);
847 struct obd_ioctl_data *data = karg;
852 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
854 rc = lu_env_init(&env, LCT_MG_THREAD);
860 case OBD_IOC_PARAM: {
861 struct mgs_thread_info *mgi = mgs_env_info(&env);
862 struct lustre_cfg *lcfg;
864 if (data->ioc_type != LUSTRE_CFG_TYPE) {
865 CERROR("%s: unknown cfg record type: %d\n",
866 mgs->mgs_obd->obd_name, data->ioc_type);
867 GOTO(out, rc = -EINVAL);
870 OBD_ALLOC(lcfg, data->ioc_plen1);
872 GOTO(out, rc = -ENOMEM);
873 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
874 GOTO(out_free, rc = -EFAULT);
876 if (lcfg->lcfg_bufcount < 1)
877 GOTO(out_free, rc = -EINVAL);
879 rc = mgs_setparam(&env, mgs, lcfg, mgi->mgi_fsname);
881 CERROR("%s: setparam err: rc = %d\n",
882 exp->exp_obd->obd_name, rc);
884 OBD_FREE(lcfg, data->ioc_plen1);
888 case OBD_IOC_REPLACE_NIDS: {
889 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
890 CERROR("No device name specified!\n");
895 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
896 CERROR("Device name is not NUL terminated!\n");
901 if (data->ioc_plen1 > MTI_NAME_MAXLEN) {
902 CERROR("Device name is too long\n");
907 if (!data->ioc_inllen2 || !data->ioc_inlbuf2) {
908 CERROR("No NIDs were specified!\n");
913 if (data->ioc_inlbuf2[data->ioc_inllen2 - 1] != 0) {
914 CERROR("NID list is not NUL terminated!\n");
919 /* replace nids in llog */
920 rc = mgs_replace_nids(&env, mgs, data->ioc_inlbuf1,
923 CERROR("%s: error replacing nids: rc = %d\n",
924 exp->exp_obd->obd_name, rc);
930 rc = mgs_iocontrol_pool(&env, mgs, data);
933 case OBD_IOC_NODEMAP:
934 rc = mgs_iocontrol_nodemap(&env, mgs, data);
937 case OBD_IOC_DUMP_LOG: {
938 struct llog_ctxt *ctxt;
940 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
941 rc = class_config_dump_llog(&env, ctxt, data->ioc_inlbuf1,
948 case OBD_IOC_CATLOGLIST:
949 rc = mgs_list_logs(&env, mgs, data);
951 case OBD_IOC_LLOG_CANCEL:
952 case OBD_IOC_LLOG_REMOVE:
953 case OBD_IOC_LLOG_CHECK:
954 case OBD_IOC_LLOG_INFO:
955 case OBD_IOC_LLOG_PRINT: {
956 struct llog_ctxt *ctxt;
958 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
959 rc = llog_ioctl(&env, ctxt, cmd, data);
965 CERROR("%s: unknown command %#x\n",
966 mgs->mgs_obd->obd_name, cmd);
975 static int mgs_connect_to_osd(struct mgs_device *m, const char *nextdev)
977 struct obd_connect_data *data = NULL;
978 struct obd_device *obd;
986 obd = class_name2obd(nextdev);
988 CERROR("can't locate next device: %s\n", nextdev);
989 GOTO(out, rc = -ENOTCONN);
992 data->ocd_version = LUSTRE_VERSION_CODE;
994 rc = obd_connect(NULL, &m->mgs_bottom_exp, obd,
995 &obd->obd_uuid, data, NULL);
997 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
1001 m->mgs_bottom = lu2dt_dev(m->mgs_bottom_exp->exp_obd->obd_lu_dev);
1002 m->mgs_dt_dev.dd_lu_dev.ld_site = m->mgs_bottom->dd_lu_dev.ld_site;
1003 LASSERT(m->mgs_dt_dev.dd_lu_dev.ld_site);
1009 static struct tgt_handler mgs_mgs_handlers[] = {
1010 TGT_RPC_HANDLER(MGS_FIRST_OPC,
1011 0, MGS_CONNECT, mgs_connect,
1012 &RQF_CONNECT, LUSTRE_OBD_VERSION),
1013 TGT_RPC_HANDLER(MGS_FIRST_OPC,
1014 0, MGS_DISCONNECT, mgs_disconnect,
1015 &RQF_MDS_DISCONNECT, LUSTRE_OBD_VERSION),
1016 TGT_MGS_HDL_VAR(0, MGS_EXCEPTION, mgs_exception),
1017 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_SET_INFO, mgs_set_info),
1018 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_TARGET_REG, mgs_target_reg),
1019 TGT_MGS_HDL_VAR(0, MGS_TARGET_DEL, mgs_target_del),
1020 TGT_MGS_HDL (HABEO_REFERO, MGS_CONFIG_READ, mgs_config_read),
1023 static struct tgt_handler mgs_obd_handlers[] = {
1024 TGT_OBD_HDL(0, OBD_PING, tgt_obd_ping),
1027 static struct tgt_handler mgs_dlm_handlers[] = {
1028 [LDLM_ENQUEUE - LDLM_FIRST_OPC] = {
1029 .th_name = "LDLM_ENQUEUE",
1030 /* don't use th_fail_id for MGS to don't interfere with MDS tests.
1031 * * There are no tests for MGS with OBD_FAIL_LDLM_ENQUEUE_NET so it
1032 * * is safe. If such tests will be needed we have to distinguish
1033 * * MDS and MGS fail ids, e.g use OBD_FAIL_MGS_ENQUEUE_NET for MGS
1034 * * instead of common OBD_FAIL_LDLM_ENQUEUE_NET */
1036 .th_opc = LDLM_ENQUEUE,
1037 .th_flags = HABEO_CLAVIS,
1038 .th_act = tgt_enqueue,
1039 .th_fmt = &RQF_LDLM_ENQUEUE,
1040 .th_version = LUSTRE_DLM_VERSION,
1044 static struct tgt_handler mgs_llog_handlers[] = {
1045 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, mgs_llog_open),
1046 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
1047 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
1048 TGT_LLOG_HDL_VAR(0, LLOG_ORIGIN_HANDLE_CLOSE, tgt_llog_close),
1049 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
1052 static struct tgt_opc_slice mgs_common_slice[] = {
1054 .tos_opc_start = MGS_FIRST_OPC,
1055 .tos_opc_end = MGS_LAST_OPC,
1056 .tos_hs = mgs_mgs_handlers
1059 .tos_opc_start = OBD_FIRST_OPC,
1060 .tos_opc_end = OBD_LAST_OPC,
1061 .tos_hs = mgs_obd_handlers
1064 .tos_opc_start = LDLM_FIRST_OPC,
1065 .tos_opc_end = LDLM_LAST_OPC,
1066 .tos_hs = mgs_dlm_handlers
1069 .tos_opc_start = LLOG_FIRST_OPC,
1070 .tos_opc_end = LLOG_LAST_OPC,
1071 .tos_hs = mgs_llog_handlers
1074 .tos_opc_start = SEC_FIRST_OPC,
1075 .tos_opc_end = SEC_LAST_OPC,
1076 .tos_hs = tgt_sec_ctx_handlers
1083 static int mgs_init0(const struct lu_env *env, struct mgs_device *mgs,
1084 struct lu_device_type *ldt, struct lustre_cfg *lcfg)
1086 struct ptlrpc_service_conf conf;
1087 struct obd_device *obd;
1088 struct lustre_mount_info *lmi;
1089 struct llog_ctxt *ctxt;
1090 struct fs_db *fsdb = NULL;
1095 lmi = server_get_mount(lustre_cfg_string(lcfg, 0));
1099 mgs->mgs_dt_dev.dd_lu_dev.ld_ops = &mgs_lu_ops;
1101 rc = mgs_connect_to_osd(mgs, lustre_cfg_string(lcfg, 3));
1105 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
1108 mgs->mgs_obd->obd_lu_dev = &mgs->mgs_dt_dev.dd_lu_dev;
1110 obd->u.obt.obt_magic = OBT_MAGIC;
1111 obd->u.obt.obt_instance = 0;
1113 /* namespace for mgs llog */
1114 obd->obd_namespace = ldlm_namespace_new(obd ,"MGS",
1115 LDLM_NAMESPACE_SERVER,
1116 LDLM_NAMESPACE_MODEST,
1118 if (obd->obd_namespace == NULL)
1119 GOTO(err_ops, rc = -ENOMEM);
1121 /* No recovery for MGCs */
1122 obd->obd_replayable = 0;
1124 rc = tgt_init(env, &mgs->mgs_lut, obd, mgs->mgs_bottom,
1125 mgs_common_slice, OBD_FAIL_MGS_ALL_REQUEST_NET,
1126 OBD_FAIL_MGS_ALL_REPLY_NET);
1130 rc = mgs_fs_setup(env, mgs);
1132 CERROR("%s: MGS filesystem method init failed: rc = %d\n",
1137 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT,
1138 obd, &llog_osd_ops);
1142 /* XXX: we need this trick till N:1 stack is supported
1143 * set "current" directory for named llogs */
1144 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1146 ctxt->loc_dir = mgs->mgs_configs_dir;
1147 llog_ctxt_put(ctxt);
1149 /* Internal mgs setup */
1150 mgs_init_fsdb_list(mgs);
1151 mutex_init(&mgs->mgs_mutex);
1152 mgs->mgs_start_time = cfs_time_current_sec();
1153 spin_lock_init(&mgs->mgs_lock);
1155 rc = lproc_mgs_setup(mgs, lustre_cfg_string(lcfg, 3));
1157 CERROR("%s: cannot initialize proc entry: rc = %d\n",
1162 /* Setup params fsdb and log, so that other servers can make a local
1163 * copy successfully when they are mounted. See LU-4783 */
1164 rc = mgs_params_fsdb_setup(env, mgs, fsdb);
1166 /* params fsdb and log can be setup later */
1167 CERROR("%s: %s fsdb and log setup failed: rc = %d\n",
1168 obd->obd_name, PARAMS_FILENAME, rc);
1170 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1171 "mgs_ldlm_client", &obd->obd_ldlm_client);
1173 conf = (typeof(conf)) {
1174 .psc_name = LUSTRE_MGS_NAME,
1175 .psc_watchdog_factor = MGS_SERVICE_WATCHDOG_FACTOR,
1177 .bc_nbufs = MGS_NBUFS,
1178 .bc_buf_size = MGS_BUFSIZE,
1179 .bc_req_max_size = MGS_MAXREQSIZE,
1180 .bc_rep_max_size = MGS_MAXREPSIZE,
1181 .bc_req_portal = MGS_REQUEST_PORTAL,
1182 .bc_rep_portal = MGC_REPLY_PORTAL,
1185 .tc_thr_name = "ll_mgs",
1186 .tc_nthrs_init = MGS_NTHRS_INIT,
1187 .tc_nthrs_max = MGS_NTHRS_MAX,
1188 .tc_ctx_tags = LCT_MG_THREAD,
1191 .so_req_handler = tgt_request_handle,
1192 .so_req_printer = target_print_req,
1196 /* Start the service threads */
1197 mgs->mgs_service = ptlrpc_register_service(&conf, obd->obd_proc_entry);
1198 if (IS_ERR(mgs->mgs_service)) {
1199 rc = PTR_ERR(mgs->mgs_service);
1200 CERROR("failed to start mgs service: %d\n", rc);
1201 mgs->mgs_service = NULL;
1202 GOTO(err_lproc, rc);
1205 ping_evictor_start();
1207 CDEBUG(D_INFO, "MGS %s started\n", obd->obd_name);
1209 /* device stack is not yet fully setup to keep no objects behind */
1210 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1213 mgs_params_fsdb_cleanup(env, mgs);
1214 lproc_mgs_cleanup(mgs);
1216 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1218 ctxt->loc_dir = NULL;
1219 llog_cleanup(env, ctxt);
1222 tgt_fini(env, &mgs->mgs_lut);
1224 /* No extra cleanup needed for llog_init_commit_thread() */
1225 mgs_fs_cleanup(env, mgs);
1227 ldlm_namespace_free(obd->obd_namespace, NULL, 0);
1228 obd->obd_namespace = NULL;
1230 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1231 if (!cfs_hash_is_empty(mgs2lu_dev(mgs)->ld_site->ls_obj_hash)) {
1232 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1233 lu_site_print(env, mgs2lu_dev(mgs)->ld_site, &msgdata,
1236 obd_disconnect(mgs->mgs_bottom_exp);
1239 server_put_mount(lustre_cfg_string(lcfg, 0), true);
1243 static struct lu_device *mgs_device_free(const struct lu_env *env,
1244 struct lu_device *lu)
1246 struct mgs_device *mgs = lu2mgs_dev(lu);
1249 dt_device_fini(&mgs->mgs_dt_dev);
1254 static int mgs_process_config(const struct lu_env *env,
1255 struct lu_device *dev,
1256 struct lustre_cfg *lcfg)
1262 static int mgs_object_init(const struct lu_env *env, struct lu_object *o,
1263 const struct lu_object_conf *unused)
1265 struct mgs_device *d = lu2mgs_dev(o->lo_dev);
1266 struct lu_device *under;
1267 struct lu_object *below;
1271 /* do no set .do_ops as mgs calls to bottom osd directly */
1273 CDEBUG(D_INFO, "object init, fid = "DFID"\n",
1274 PFID(lu_object_fid(o)));
1276 under = &d->mgs_bottom->dd_lu_dev;
1277 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
1279 lu_object_add(o, below);
1286 static void mgs_object_free(const struct lu_env *env, struct lu_object *o)
1288 struct mgs_object *obj = lu2mgs_obj(o);
1289 struct lu_object_header *h = o->lo_header;
1291 dt_object_fini(&obj->mgo_obj);
1292 lu_object_header_fini(h);
1296 static int mgs_object_print(const struct lu_env *env, void *cookie,
1297 lu_printer_t p, const struct lu_object *l)
1299 const struct mgs_object *o = lu2mgs_obj((struct lu_object *) l);
1301 return (*p)(env, cookie, LUSTRE_MGS_NAME"-object@%p", o);
1304 struct lu_object_operations mgs_lu_obj_ops = {
1305 .loo_object_init = mgs_object_init,
1306 .loo_object_free = mgs_object_free,
1307 .loo_object_print = mgs_object_print,
1310 struct lu_object *mgs_object_alloc(const struct lu_env *env,
1311 const struct lu_object_header *hdr,
1312 struct lu_device *d)
1314 struct lu_object_header *h;
1315 struct mgs_object *o;
1316 struct lu_object *l;
1318 LASSERT(hdr == NULL);
1322 l = &o->mgo_obj.do_lu;
1325 lu_object_header_init(h);
1326 dt_object_init(&o->mgo_obj, h, d);
1327 lu_object_add_top(h, l);
1329 l->lo_ops = &mgs_lu_obj_ops;
1337 const struct lu_device_operations mgs_lu_ops = {
1338 .ldo_object_alloc = mgs_object_alloc,
1339 .ldo_process_config = mgs_process_config,
1342 static struct lu_device *mgs_device_alloc(const struct lu_env *env,
1343 struct lu_device_type *type,
1344 struct lustre_cfg *lcfg)
1346 struct mgs_device *mgs;
1347 struct lu_device *ludev;
1351 ludev = ERR_PTR(-ENOMEM);
1355 ludev = mgs2lu_dev(mgs);
1356 dt_device_init(&mgs->mgs_dt_dev, type);
1357 rc = mgs_init0(env, mgs, type, lcfg);
1359 mgs_device_free(env, ludev);
1360 ludev = ERR_PTR(rc);
1366 static struct lu_device *mgs_device_fini(const struct lu_env *env,
1367 struct lu_device *d)
1369 struct mgs_device *mgs = lu2mgs_dev(d);
1370 struct obd_device *obd = mgs->mgs_obd;
1371 struct llog_ctxt *ctxt;
1375 LASSERT(mgs->mgs_bottom);
1377 class_disconnect_exports(obd);
1379 ping_evictor_stop();
1381 ptlrpc_unregister_service(mgs->mgs_service);
1383 obd_exports_barrier(obd);
1384 obd_zombie_barrier();
1386 tgt_fini(env, &mgs->mgs_lut);
1387 mgs_params_fsdb_cleanup(env, mgs);
1388 mgs_cleanup_fsdb_list(mgs);
1389 lproc_mgs_cleanup(mgs);
1391 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1393 ctxt->loc_dir = NULL;
1394 llog_cleanup(env, ctxt);
1397 mgs_fs_cleanup(env, mgs);
1399 ldlm_namespace_free(obd->obd_namespace, NULL, 1);
1400 obd->obd_namespace = NULL;
1402 lu_site_purge(env, d->ld_site, ~0);
1403 if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
1404 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1405 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
1408 LASSERT(mgs->mgs_bottom_exp);
1409 obd_disconnect(mgs->mgs_bottom_exp);
1411 server_put_mount(obd->obd_name, true);
1416 /* context key constructor/destructor: mgs_key_init, mgs_key_fini */
1417 LU_KEY_INIT_FINI(mgs, struct mgs_thread_info);
1419 LU_TYPE_INIT_FINI(mgs, &mgs_thread_key);
1421 LU_CONTEXT_KEY_DEFINE(mgs, LCT_MG_THREAD);
1423 static struct lu_device_type_operations mgs_device_type_ops = {
1424 .ldto_init = mgs_type_init,
1425 .ldto_fini = mgs_type_fini,
1427 .ldto_start = mgs_type_start,
1428 .ldto_stop = mgs_type_stop,
1430 .ldto_device_alloc = mgs_device_alloc,
1431 .ldto_device_free = mgs_device_free,
1433 .ldto_device_fini = mgs_device_fini
1436 static struct lu_device_type mgs_device_type = {
1437 .ldt_tags = LU_DEVICE_DT,
1438 .ldt_name = LUSTRE_MGS_NAME,
1439 .ldt_ops = &mgs_device_type_ops,
1440 .ldt_ctx_tags = LCT_MG_THREAD
1443 static int mgs_obd_connect(const struct lu_env *env, struct obd_export **exp,
1444 struct obd_device *obd, struct obd_uuid *cluuid,
1445 struct obd_connect_data *data, void *localdata)
1447 struct obd_export *lexp;
1448 struct lustre_handle conn = { 0 };
1453 if (exp == NULL || obd == NULL || cluuid == NULL)
1456 rc = class_connect(&conn, obd, cluuid);
1460 lexp = class_conn2export(&conn);
1465 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1466 data->ocd_version = LUSTRE_VERSION_CODE;
1467 lexp->exp_connect_data = *data;
1470 tgt_counter_incr(lexp, LPROC_MGS_CONNECT);
1472 rc = mgs_export_stats_init(obd, lexp, localdata);
1474 class_disconnect(lexp);
1481 static int mgs_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
1482 struct obd_device *obd, struct obd_uuid *cluuid,
1483 struct obd_connect_data *data, void *localdata)
1487 if (exp == NULL || obd == NULL || cluuid == NULL)
1490 tgt_counter_incr(exp, LPROC_MGS_CONNECT);
1493 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1494 data->ocd_version = LUSTRE_VERSION_CODE;
1495 exp->exp_connect_data = *data;
1498 RETURN(mgs_export_stats_init(obd, exp, localdata));
1501 static int mgs_obd_disconnect(struct obd_export *exp)
1509 mgs_fsc_cleanup(exp);
1511 class_export_get(exp);
1512 tgt_counter_incr(exp, LPROC_MGS_DISCONNECT);
1514 rc = server_disconnect_export(exp);
1515 class_export_put(exp);
1519 /* use obd ops to offer management infrastructure */
1520 static struct obd_ops mgs_obd_device_ops = {
1521 .o_owner = THIS_MODULE,
1522 .o_connect = mgs_obd_connect,
1523 .o_reconnect = mgs_obd_reconnect,
1524 .o_disconnect = mgs_obd_disconnect,
1525 .o_init_export = mgs_init_export,
1526 .o_destroy_export = mgs_destroy_export,
1527 .o_iocontrol = mgs_iocontrol,
1530 static int __init mgs_init(void)
1532 return class_register_type(&mgs_obd_device_ops, NULL, true, NULL,
1533 #ifndef HAVE_ONLY_PROCFS_SEQ
1536 LUSTRE_MGS_NAME, &mgs_device_type);
1539 static void /*__exit*/ mgs_exit(void)
1541 class_unregister_type(LUSTRE_MGS_NAME);
1544 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1545 MODULE_DESCRIPTION("Lustre Management Server (MGS)");
1546 MODULE_LICENSE("GPL");
1548 module_init(mgs_init);
1549 module_exit(mgs_exit);