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_param.h>
50 #include "mgs_internal.h"
53 * Regular MGS handlers
55 static int mgs_connect(struct tgt_session_info *tsi)
57 struct ptlrpc_request *req = tgt_ses_req(tsi);
62 rc = tgt_connect(tsi);
66 if (lustre_msg_get_conn_cnt(req->rq_reqmsg) > 1)
67 lustre_msg_add_op_flags(req->rq_repmsg, MSG_CONNECT_RECONNECT);
72 static int mgs_disconnect(struct tgt_session_info *tsi)
78 LASSERT(tsi->tsi_exp);
80 rc = tgt_disconnect(tsi);
82 RETURN(err_serious(rc));
86 static int mgs_exception(struct tgt_session_info *tsi)
90 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_EXCEPTION);
95 static int mgs_set_info(struct tgt_session_info *tsi)
97 struct mgs_thread_info *mgi;
98 struct mgs_send_param *msp, *rep_msp;
99 struct lustre_cfg *lcfg;
104 mgi = mgs_env_info(tsi->tsi_env);
106 RETURN(err_serious(PTR_ERR(mgi)));
108 msp = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
110 RETURN(err_serious(-EFAULT));
112 /* Construct lustre_cfg structure to pass to function mgs_setparam */
113 lustre_cfg_bufs_reset(&mgi->mgi_bufs, NULL);
114 lustre_cfg_bufs_set_string(&mgi->mgi_bufs, 1, msp->mgs_param);
115 lcfg = lustre_cfg_new(LCFG_PARAM, &mgi->mgi_bufs);
117 rc = mgs_setparam(tsi->tsi_env, exp2mgs_dev(tsi->tsi_exp), lcfg,
120 LCONSOLE_WARN("%s: Unable to set parameter %s for %s: %d\n",
121 tgt_name(tsi->tsi_tgt), msp->mgs_param,
122 mgi->mgi_fsname, rc);
126 /* send back the whole msp in the reply */
127 rep_msp = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_SEND_PARAM);
131 lustre_cfg_free(lcfg);
141 static int mgs_completion_ast_generic(struct ldlm_lock *lock, __u64 flags,
142 void *cbdata, enum ast_type type)
146 if (!(flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
147 LDLM_FL_BLOCK_CONV))) {
150 /* l_ast_data is used as a marker to avoid cancel ldlm lock
151 * twice. See LU-2317. */
152 lock_res_and_lock(lock);
153 fsdb = (struct fs_db *)lock->l_ast_data;
154 lock->l_ast_data = NULL;
155 unlock_res_and_lock(lock);
158 struct lustre_handle lockh;
162 /* clear the bit before lock put */
163 clear_bit(FSDB_REVOKING_LOCK,
167 clear_bit(FSDB_REVOKING_PARAMS,
171 mgs_ir_notify_complete(fsdb);
177 ldlm_lock2handle(lock, &lockh);
178 ldlm_lock_decref_and_cancel(&lockh, LCK_EX);
182 RETURN(ldlm_completion_ast(lock, flags, cbdata));
185 static int mgs_completion_ast_config(struct ldlm_lock *lock, __u64 flags,
188 return mgs_completion_ast_generic(lock, flags, cbdata, AST_CONFIG);
191 static int mgs_completion_ast_params(struct ldlm_lock *lock, __u64 flags,
194 return mgs_completion_ast_generic(lock, flags, cbdata, AST_PARAMS);
197 static int mgs_completion_ast_ir(struct ldlm_lock *lock, __u64 flags,
200 return mgs_completion_ast_generic(lock, flags, cbdata, AST_IR);
203 void mgs_revoke_lock(struct mgs_device *mgs, struct fs_db *fsdb, int type)
205 ldlm_completion_callback cp = NULL;
206 struct lustre_handle lockh = { 0 };
207 struct ldlm_res_id res_id;
208 __u64 flags = LDLM_FL_ATOMIC_CB;
212 LASSERT(fsdb->fsdb_name[0] != '\0');
213 rc = mgc_fsname2resid(fsdb->fsdb_name, &res_id, type);
216 case CONFIG_T_CONFIG:
217 cp = mgs_completion_ast_config;
218 if (test_and_set_bit(FSDB_REVOKING_LOCK, &fsdb->fsdb_flags))
221 case CONFIG_T_PARAMS:
222 cp = mgs_completion_ast_params;
223 if (test_and_set_bit(FSDB_REVOKING_PARAMS, &fsdb->fsdb_flags))
226 case CONFIG_T_RECOVER:
227 cp = mgs_completion_ast_ir;
234 rc = ldlm_cli_enqueue_local(mgs->mgs_obd->obd_namespace,
235 &res_id, LDLM_PLAIN, NULL, LCK_EX,
236 &flags, ldlm_blocking_ast, cp,
237 NULL, fsdb, 0, LVB_T_NONE, NULL,
239 if (rc != ELDLM_OK) {
240 CERROR("can't take cfg lock for "LPX64"/"LPX64"(%d)\n",
241 le64_to_cpu(res_id.name[0]),
242 le64_to_cpu(res_id.name[1]), rc);
244 if (type == CONFIG_T_CONFIG)
245 clear_bit(FSDB_REVOKING_LOCK,
248 if (type == CONFIG_T_PARAMS)
249 clear_bit(FSDB_REVOKING_PARAMS,
252 /* lock has been cancelled in completion_ast. */
261 static int mgs_check_target(const struct lu_env *env,
262 struct mgs_device *mgs,
263 struct mgs_target_info *mti)
268 rc = mgs_check_index(env, mgs, mti);
270 LCONSOLE_ERROR_MSG(0x13b, "%s claims to have registered, but "
271 "this MGS does not know about it, preventing "
272 "registration.\n", mti->mti_svname);
274 } else if (rc == -1) {
275 LCONSOLE_ERROR_MSG(0x13c, "Client log %s-client has "
276 "disappeared! Regenerating all logs.\n",
278 mti->mti_flags |= LDD_F_WRITECONF;
281 /* Index is correctly marked as used */
283 /* If the logs don't contain the mti_nids then add
284 them as failover nids */
285 rc = mgs_check_failnid(env, mgs, mti);
291 /* Ensure this is not a failover node that is connecting first*/
292 static int mgs_check_failover_reg(struct mgs_target_info *mti)
298 ptr = mti->mti_params;
299 while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
300 while (class_parse_nid_quiet(ptr, &nid, &ptr) == 0) {
301 for (i = 0; i < mti->mti_nid_count; i++) {
302 if (nid == mti->mti_nids[i]) {
303 LCONSOLE_WARN("Denying initial registra"
304 "tion attempt from nid %s"
305 ", specified as failover"
306 "\n",libcfs_nid2str(nid));
307 return -EADDRNOTAVAIL;
315 /* Called whenever a target starts up. Flags indicate first connect, etc. */
316 static int mgs_target_reg(struct tgt_session_info *tsi)
318 struct obd_device *obd = tsi->tsi_exp->exp_obd;
319 struct mgs_device *mgs = exp2mgs_dev(tsi->tsi_exp);
320 struct mgs_target_info *mti, *rep_mti;
327 rc = lu_env_refill((struct lu_env *)tsi->tsi_env);
329 return err_serious(rc);
331 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_REG);
333 mti = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
335 DEBUG_REQ(D_HA, tgt_ses_req(tsi), "no mgs_send_param");
336 RETURN(err_serious(-EFAULT));
339 if (OCD_HAS_FLAG(&tgt_ses_req(tsi)->rq_export->exp_connect_data,
341 opc = mti->mti_flags & LDD_F_OPC_MASK;
345 if (opc == LDD_F_OPC_READY) {
346 CDEBUG(D_MGS, "fs: %s index: %d is ready to reconnect.\n",
347 mti->mti_fsname, mti->mti_stripe_index);
348 rc = mgs_ir_update(tsi->tsi_env, mgs, mti);
350 LASSERT(!(mti->mti_flags & LDD_F_IR_CAPABLE));
351 CERROR("Update IR return with %d(ignore and IR "
354 GOTO(out_nolock, rc);
357 /* Do not support unregistering right now. */
358 if (opc != LDD_F_OPC_REG)
359 GOTO(out_nolock, rc = -EINVAL);
361 CDEBUG(D_MGS, "fs: %s index: %d is registered to MGS.\n",
362 mti->mti_fsname, mti->mti_stripe_index);
364 if (mti->mti_flags & LDD_F_NEED_INDEX)
365 mti->mti_flags |= LDD_F_WRITECONF;
367 if (!(mti->mti_flags & (LDD_F_WRITECONF | LDD_F_UPGRADE14 |
369 /* We're just here as a startup ping. */
370 CDEBUG(D_MGS, "Server %s is running on %s\n",
371 mti->mti_svname, obd_export_nid2str(tsi->tsi_exp));
372 rc = mgs_check_target(tsi->tsi_env, mgs, mti);
373 /* above will set appropriate mti flags */
375 /* Nothing wrong, or fatal error */
376 GOTO(out_nolock, rc);
377 } else if (!(mti->mti_flags & LDD_F_NO_PRIMNODE)) {
378 rc = mgs_check_failover_reg(mti);
380 GOTO(out_nolock, rc);
383 OBD_FAIL_TIMEOUT(OBD_FAIL_MGS_PAUSE_TARGET_REG, 10);
385 if (mti->mti_flags & LDD_F_WRITECONF) {
386 if (mti->mti_flags & LDD_F_SV_TYPE_MDT &&
387 mti->mti_stripe_index == 0) {
388 rc = mgs_erase_logs(tsi->tsi_env, mgs,
390 LCONSOLE_WARN("%s: Logs for fs %s were removed by user "
391 "request. All servers must be restarted "
392 "in order to regenerate the logs."
393 "\n", obd->obd_name, mti->mti_fsname);
394 } else if (mti->mti_flags &
395 (LDD_F_SV_TYPE_OST | LDD_F_SV_TYPE_MDT)) {
396 rc = mgs_erase_log(tsi->tsi_env, mgs, mti->mti_svname);
397 LCONSOLE_WARN("%s: Regenerating %s log by user "
399 obd->obd_name, mti->mti_svname);
401 mti->mti_flags |= LDD_F_UPDATE;
402 /* Erased logs means start from scratch. */
403 mti->mti_flags &= ~LDD_F_UPGRADE14;
405 GOTO(out_nolock, rc);
408 rc = mgs_find_or_make_fsdb(tsi->tsi_env, mgs, mti->mti_fsname, &fsdb);
410 CERROR("Can't get db for %s: %d\n", mti->mti_fsname, rc);
411 GOTO(out_nolock, rc);
415 * Log writing contention is handled by the fsdb_mutex.
417 * It should be alright if someone was reading while we were
418 * updating the logs - if we revoke at the end they will just update
419 * from where they left off.
422 if (mti->mti_flags & LDD_F_UPGRADE14) {
423 CERROR("Can't upgrade from 1.4 (%d)\n", rc);
427 if (mti->mti_flags & LDD_F_UPDATE) {
428 CDEBUG(D_MGS, "updating %s, index=%d\n", mti->mti_svname,
429 mti->mti_stripe_index);
431 /* create or update the target log
432 and update the client/mdt logs */
433 rc = mgs_write_log_target(tsi->tsi_env, mgs, mti, fsdb);
435 CERROR("Failed to write %s log (%d)\n",
436 mti->mti_svname, rc);
440 mti->mti_flags &= ~(LDD_F_VIRGIN | LDD_F_UPDATE |
441 LDD_F_NEED_INDEX | LDD_F_WRITECONF |
443 mti->mti_flags |= LDD_F_REWRITE_LDD;
447 mgs_revoke_lock(mgs, fsdb, CONFIG_T_CONFIG);
450 CDEBUG(D_MGS, "replying with %s, index=%d, rc=%d\n", mti->mti_svname,
451 mti->mti_stripe_index, rc);
452 /* An error flag is set in the mti reply rather than an error code */
454 mti->mti_flags |= LDD_F_ERROR;
456 /* send back the whole mti in the reply */
457 rep_mti = req_capsule_server_get(tsi->tsi_pill, &RMF_MGS_TARGET_INFO);
460 /* Flush logs to disk */
461 dt_sync(tsi->tsi_env, mgs->mgs_bottom);
465 /* Called whenever a target cleans up. */
466 static int mgs_target_del(struct tgt_session_info *tsi)
470 tgt_counter_incr(tsi->tsi_exp, LPROC_MGS_TARGET_DEL);
475 static int mgs_config_read(struct tgt_session_info *tsi)
477 struct ptlrpc_request *req = tgt_ses_req(tsi);
478 struct mgs_config_body *body;
483 body = req_capsule_client_get(tsi->tsi_pill, &RMF_MGS_CONFIG_BODY);
485 DEBUG_REQ(D_HA, req, "no mgs_config_body");
486 RETURN(err_serious(-EFAULT));
489 switch (body->mcb_type) {
490 case CONFIG_T_RECOVER:
491 rc = mgs_get_ir_logs(req);
493 case CONFIG_T_CONFIG:
504 static int mgs_llog_open(struct tgt_session_info *tsi)
506 struct mgs_thread_info *mgi;
507 struct ptlrpc_request *req = tgt_ses_req(tsi);
513 rc = tgt_llog_open(tsi);
518 * For old clients there is no direct way of knowing which file system
519 * a client is operating at the MGS side. But we need to pick up those
520 * clients so that the MGS can mark the corresponding file system as
521 * non-IR capable because old clients are not ready to be notified.
523 * Therefore we attempt to detect the file systems name by hacking the
524 * llog operation which is currently used by the clients to fetch
525 * configuration logs. At present this is fine because this is the
526 * ONLY llog operation between mgc and the MGS.
528 * If extra llog operation are going to be added, this function needs
531 * When releases prior than 2.0 are not supported, the following code
534 mgi = mgs_env_info(tsi->tsi_env);
536 RETURN(PTR_ERR(mgi));
538 logname = req_capsule_client_get(tsi->tsi_pill, &RMF_NAME);
540 char *ptr = strchr(logname, '-');
541 int len = (int)(ptr - logname);
543 if (ptr == NULL || len >= sizeof(mgi->mgi_fsname)) {
544 LCONSOLE_WARN("%s: non-config logname received: %s\n",
545 tgt_name(tsi->tsi_tgt), logname);
546 /* not error, this can be llog test name */
548 strncpy(mgi->mgi_fsname, logname, len);
549 mgi->mgi_fsname[len] = 0;
551 rc = mgs_fsc_attach(tsi->tsi_env, tsi->tsi_exp,
553 if (rc && rc != -EEXIST) {
554 LCONSOLE_WARN("%s: Unable to add client %s "
555 "to file system %s: %d\n",
556 tgt_name(tsi->tsi_tgt),
557 libcfs_nid2str(req->rq_peer.nid),
558 mgi->mgi_fsname, rc);
564 CERROR("%s: no logname in request\n", tgt_name(tsi->tsi_tgt));
570 static inline int mgs_init_export(struct obd_export *exp)
572 struct mgs_export_data *data = &exp->u.eu_mgs_data;
574 /* init mgs_export_data for fsc */
575 spin_lock_init(&data->med_lock);
576 CFS_INIT_LIST_HEAD(&data->med_clients);
578 spin_lock(&exp->exp_lock);
579 exp->exp_connecting = 1;
580 spin_unlock(&exp->exp_lock);
582 /* self-export doesn't need client data and ldlm initialization */
583 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
584 &exp->exp_client_uuid)))
586 return ldlm_init_export(exp);
589 static inline int mgs_destroy_export(struct obd_export *exp)
593 target_destroy_export(exp);
594 mgs_client_free(exp);
596 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
597 &exp->exp_client_uuid)))
600 ldlm_destroy_export(exp);
605 static int mgs_extract_fs_pool(char * arg, char *fsname, char *poolname)
610 for (ptr = arg; (*ptr != '\0') && (*ptr != '.'); ptr++ ) {
618 strcpy(poolname, ptr);
623 static int mgs_iocontrol_pool(const struct lu_env *env,
624 struct mgs_device *mgs,
625 struct obd_ioctl_data *data)
627 struct mgs_thread_info *mgi = mgs_env_info(env);
629 struct lustre_cfg *lcfg = NULL;
630 char *poolname = NULL;
633 OBD_ALLOC(poolname, LOV_MAXPOOLNAME + 1);
634 if (poolname == NULL)
637 if (data->ioc_type != LUSTRE_CFG_TYPE) {
638 CERROR("%s: unknown cfg record type: %d\n",
639 mgs->mgs_obd->obd_name, data->ioc_type);
640 GOTO(out_pool, rc = -EINVAL);
643 if (data->ioc_plen1 > PAGE_CACHE_SIZE)
644 GOTO(out_pool, rc = -E2BIG);
646 OBD_ALLOC(lcfg, data->ioc_plen1);
648 GOTO(out_pool, rc = -ENOMEM);
650 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
651 GOTO(out_lcfg, rc = -EFAULT);
653 if (lcfg->lcfg_bufcount < 2)
654 GOTO(out_lcfg, rc = -EFAULT);
656 /* first arg is always <fsname>.<poolname> */
657 rc = mgs_extract_fs_pool(lustre_cfg_string(lcfg, 1), mgi->mgi_fsname,
662 switch (lcfg->lcfg_command) {
664 if (lcfg->lcfg_bufcount != 2)
665 GOTO(out_lcfg, rc = -EINVAL);
666 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_NEW, mgi->mgi_fsname,
670 if (lcfg->lcfg_bufcount != 3)
671 GOTO(out_lcfg, rc = -EINVAL);
672 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_ADD, mgi->mgi_fsname,
673 poolname, lustre_cfg_string(lcfg, 2));
676 if (lcfg->lcfg_bufcount != 3)
677 GOTO(out_lcfg, rc = -EINVAL);
678 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_REM, mgi->mgi_fsname,
679 poolname, lustre_cfg_string(lcfg, 2));
682 if (lcfg->lcfg_bufcount != 2)
683 GOTO(out_lcfg, rc = -EINVAL);
684 rc = mgs_pool_cmd(env, mgs, LCFG_POOL_DEL, mgi->mgi_fsname,
692 CERROR("OBD_IOC_POOL err %d, cmd %X for pool %s.%s\n",
693 rc, lcfg->lcfg_command, mgi->mgi_fsname, poolname);
698 OBD_FREE(lcfg, data->ioc_plen1);
700 OBD_FREE(poolname, LOV_MAXPOOLNAME + 1);
704 /* from mdt_iocontrol */
705 int mgs_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
706 void *karg, void *uarg)
708 struct mgs_device *mgs = exp2mgs_dev(exp);
709 struct obd_ioctl_data *data = karg;
714 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
716 rc = lu_env_init(&env, LCT_MG_THREAD);
722 case OBD_IOC_PARAM: {
723 struct mgs_thread_info *mgi = mgs_env_info(&env);
724 struct lustre_cfg *lcfg;
726 if (data->ioc_type != LUSTRE_CFG_TYPE) {
727 CERROR("%s: unknown cfg record type: %d\n",
728 mgs->mgs_obd->obd_name, data->ioc_type);
729 GOTO(out, rc = -EINVAL);
732 OBD_ALLOC(lcfg, data->ioc_plen1);
734 GOTO(out, rc = -ENOMEM);
735 if (copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
736 GOTO(out_free, rc = -EFAULT);
738 if (lcfg->lcfg_bufcount < 1)
739 GOTO(out_free, rc = -EINVAL);
741 rc = mgs_setparam(&env, mgs, lcfg, mgi->mgi_fsname);
743 CERROR("%s: setparam err: rc = %d\n",
744 exp->exp_obd->obd_name, rc);
746 OBD_FREE(lcfg, data->ioc_plen1);
750 case OBD_IOC_REPLACE_NIDS: {
751 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
752 CERROR("No device name specified!\n");
757 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
758 CERROR("Device name is not NUL terminated!\n");
763 if (data->ioc_plen1 > MTI_NAME_MAXLEN) {
764 CERROR("Device name is too long\n");
769 if (!data->ioc_inllen2 || !data->ioc_inlbuf2) {
770 CERROR("No NIDs were specified!\n");
775 if (data->ioc_inlbuf2[data->ioc_inllen2 - 1] != 0) {
776 CERROR("NID list is not NUL terminated!\n");
781 /* replace nids in llog */
782 rc = mgs_replace_nids(&env, mgs, data->ioc_inlbuf1,
785 CERROR("%s: error replacing nids: rc = %d\n",
786 exp->exp_obd->obd_name, rc);
792 rc = mgs_iocontrol_pool(&env, mgs, data);
795 case OBD_IOC_DUMP_LOG: {
796 struct llog_ctxt *ctxt;
798 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
799 rc = class_config_dump_llog(&env, ctxt, data->ioc_inlbuf1,
806 case OBD_IOC_CATLOGLIST:
807 rc = mgs_list_logs(&env, mgs, data);
809 case OBD_IOC_LLOG_CANCEL:
810 case OBD_IOC_LLOG_REMOVE:
811 case OBD_IOC_LLOG_CHECK:
812 case OBD_IOC_LLOG_INFO:
813 case OBD_IOC_LLOG_PRINT: {
814 struct llog_ctxt *ctxt;
816 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
817 rc = llog_ioctl(&env, ctxt, cmd, data);
823 CERROR("%s: unknown command %#x\n",
824 mgs->mgs_obd->obd_name, cmd);
833 static int mgs_connect_to_osd(struct mgs_device *m, const char *nextdev)
835 struct obd_connect_data *data = NULL;
836 struct obd_device *obd;
844 obd = class_name2obd(nextdev);
846 CERROR("can't locate next device: %s\n", nextdev);
847 GOTO(out, rc = -ENOTCONN);
850 data->ocd_version = LUSTRE_VERSION_CODE;
852 rc = obd_connect(NULL, &m->mgs_bottom_exp, obd,
853 &obd->obd_uuid, data, NULL);
855 CERROR("cannot connect to next dev %s (%d)\n", nextdev, rc);
859 m->mgs_bottom = lu2dt_dev(m->mgs_bottom_exp->exp_obd->obd_lu_dev);
860 m->mgs_dt_dev.dd_lu_dev.ld_site = m->mgs_bottom->dd_lu_dev.ld_site;
861 LASSERT(m->mgs_dt_dev.dd_lu_dev.ld_site);
867 static struct tgt_handler mgs_mgs_handlers[] = {
868 TGT_RPC_HANDLER(MGS_FIRST_OPC,
869 0, MGS_CONNECT, mgs_connect,
870 &RQF_CONNECT, LUSTRE_OBD_VERSION),
871 TGT_RPC_HANDLER(MGS_FIRST_OPC,
872 0, MGS_DISCONNECT, mgs_disconnect,
873 &RQF_MDS_DISCONNECT, LUSTRE_OBD_VERSION),
874 TGT_MGS_HDL_VAR(0, MGS_EXCEPTION, mgs_exception),
875 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_SET_INFO, mgs_set_info),
876 TGT_MGS_HDL (HABEO_REFERO | MUTABOR, MGS_TARGET_REG, mgs_target_reg),
877 TGT_MGS_HDL_VAR(0, MGS_TARGET_DEL, mgs_target_del),
878 TGT_MGS_HDL (HABEO_REFERO, MGS_CONFIG_READ, mgs_config_read),
881 static struct tgt_handler mgs_obd_handlers[] = {
882 TGT_OBD_HDL(0, OBD_PING, tgt_obd_ping),
885 static struct tgt_handler mgs_dlm_handlers[] = {
886 [LDLM_ENQUEUE - LDLM_FIRST_OPC] = {
887 .th_name = "LDLM_ENQUEUE",
888 /* don't use th_fail_id for MGS to don't interfere with MDS tests.
889 * * There are no tests for MGS with OBD_FAIL_LDLM_ENQUEUE_NET so it
890 * * is safe. If such tests will be needed we have to distinguish
891 * * MDS and MGS fail ids, e.g use OBD_FAIL_MGS_ENQUEUE_NET for MGS
892 * * instead of common OBD_FAIL_LDLM_ENQUEUE_NET */
894 .th_opc = LDLM_ENQUEUE,
895 .th_flags = HABEO_CLAVIS,
896 .th_act = tgt_enqueue,
897 .th_fmt = &RQF_LDLM_ENQUEUE,
898 .th_version = LUSTRE_DLM_VERSION,
902 static struct tgt_handler mgs_llog_handlers[] = {
903 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_CREATE, mgs_llog_open),
904 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_NEXT_BLOCK, tgt_llog_next_block),
905 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_READ_HEADER, tgt_llog_read_header),
906 TGT_LLOG_HDL_VAR(0, LLOG_ORIGIN_HANDLE_CLOSE, tgt_llog_close),
907 TGT_LLOG_HDL (0, LLOG_ORIGIN_HANDLE_PREV_BLOCK, tgt_llog_prev_block),
910 static struct tgt_opc_slice mgs_common_slice[] = {
912 .tos_opc_start = MGS_FIRST_OPC,
913 .tos_opc_end = MGS_LAST_OPC,
914 .tos_hs = mgs_mgs_handlers
917 .tos_opc_start = OBD_FIRST_OPC,
918 .tos_opc_end = OBD_LAST_OPC,
919 .tos_hs = mgs_obd_handlers
922 .tos_opc_start = LDLM_FIRST_OPC,
923 .tos_opc_end = LDLM_LAST_OPC,
924 .tos_hs = mgs_dlm_handlers
927 .tos_opc_start = LLOG_FIRST_OPC,
928 .tos_opc_end = LLOG_LAST_OPC,
929 .tos_hs = mgs_llog_handlers
932 .tos_opc_start = SEC_FIRST_OPC,
933 .tos_opc_end = SEC_LAST_OPC,
934 .tos_hs = tgt_sec_ctx_handlers
941 static int mgs_init0(const struct lu_env *env, struct mgs_device *mgs,
942 struct lu_device_type *ldt, struct lustre_cfg *lcfg)
944 struct ptlrpc_service_conf conf;
945 struct obd_device *obd;
946 struct lustre_mount_info *lmi;
947 struct llog_ctxt *ctxt;
952 lmi = server_get_mount(lustre_cfg_string(lcfg, 0));
956 mgs->mgs_dt_dev.dd_lu_dev.ld_ops = &mgs_lu_ops;
958 rc = mgs_connect_to_osd(mgs, lustre_cfg_string(lcfg, 3));
962 obd = class_name2obd(lustre_cfg_string(lcfg, 0));
965 mgs->mgs_obd->obd_lu_dev = &mgs->mgs_dt_dev.dd_lu_dev;
967 obd->u.obt.obt_magic = OBT_MAGIC;
968 obd->u.obt.obt_instance = 0;
970 /* namespace for mgs llog */
971 obd->obd_namespace = ldlm_namespace_new(obd ,"MGS",
972 LDLM_NAMESPACE_SERVER,
973 LDLM_NAMESPACE_MODEST,
975 if (obd->obd_namespace == NULL)
976 GOTO(err_ops, rc = -ENOMEM);
978 /* No recovery for MGCs */
979 obd->obd_replayable = 0;
981 rc = tgt_init(env, &mgs->mgs_lut, obd, mgs->mgs_bottom,
982 mgs_common_slice, OBD_FAIL_MGS_ALL_REQUEST_NET,
983 OBD_FAIL_MGS_ALL_REPLY_NET);
987 rc = mgs_fs_setup(env, mgs);
989 CERROR("%s: MGS filesystem method init failed: rc = %d\n",
994 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_ORIG_CTXT,
999 /* XXX: we need this trick till N:1 stack is supported
1000 * set "current" directory for named llogs */
1001 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1003 ctxt->loc_dir = mgs->mgs_configs_dir;
1004 llog_ctxt_put(ctxt);
1006 /* Internal mgs setup */
1007 mgs_init_fsdb_list(mgs);
1008 mutex_init(&mgs->mgs_mutex);
1009 mgs->mgs_start_time = cfs_time_current_sec();
1010 spin_lock_init(&mgs->mgs_lock);
1012 rc = lproc_mgs_setup(mgs, lustre_cfg_string(lcfg, 3));
1014 CERROR("%s: cannot initialize proc entry: rc = %d\n",
1019 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
1020 "mgs_ldlm_client", &obd->obd_ldlm_client);
1022 conf = (typeof(conf)) {
1023 .psc_name = LUSTRE_MGS_NAME,
1024 .psc_watchdog_factor = MGS_SERVICE_WATCHDOG_FACTOR,
1026 .bc_nbufs = MGS_NBUFS,
1027 .bc_buf_size = MGS_BUFSIZE,
1028 .bc_req_max_size = MGS_MAXREQSIZE,
1029 .bc_rep_max_size = MGS_MAXREPSIZE,
1030 .bc_req_portal = MGS_REQUEST_PORTAL,
1031 .bc_rep_portal = MGC_REPLY_PORTAL,
1034 .tc_thr_name = "ll_mgs",
1035 .tc_nthrs_init = MGS_NTHRS_INIT,
1036 .tc_nthrs_max = MGS_NTHRS_MAX,
1037 .tc_ctx_tags = LCT_MG_THREAD,
1040 .so_req_handler = tgt_request_handle,
1041 .so_req_printer = target_print_req,
1045 /* Start the service threads */
1046 mgs->mgs_service = ptlrpc_register_service(&conf, obd->obd_proc_entry);
1047 if (IS_ERR(mgs->mgs_service)) {
1048 rc = PTR_ERR(mgs->mgs_service);
1049 CERROR("failed to start mgs service: %d\n", rc);
1050 mgs->mgs_service = NULL;
1051 GOTO(err_lproc, rc);
1054 ping_evictor_start();
1056 CDEBUG(D_INFO, "MGS %s started\n", obd->obd_name);
1058 /* device stack is not yet fully setup to keep no objects behind */
1059 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1062 lproc_mgs_cleanup(mgs);
1064 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1066 ctxt->loc_dir = NULL;
1067 llog_cleanup(env, ctxt);
1070 tgt_fini(env, &mgs->mgs_lut);
1072 /* No extra cleanup needed for llog_init_commit_thread() */
1073 mgs_fs_cleanup(env, mgs);
1075 ldlm_namespace_free(obd->obd_namespace, NULL, 0);
1076 obd->obd_namespace = NULL;
1078 lu_site_purge(env, mgs2lu_dev(mgs)->ld_site, ~0);
1079 if (!cfs_hash_is_empty(mgs2lu_dev(mgs)->ld_site->ls_obj_hash)) {
1080 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1081 lu_site_print(env, mgs2lu_dev(mgs)->ld_site, &msgdata,
1084 obd_disconnect(mgs->mgs_bottom_exp);
1087 server_put_mount(lustre_cfg_string(lcfg, 0));
1091 static struct lu_device *mgs_device_free(const struct lu_env *env,
1092 struct lu_device *lu)
1094 struct mgs_device *mgs = lu2mgs_dev(lu);
1097 dt_device_fini(&mgs->mgs_dt_dev);
1102 static int mgs_process_config(const struct lu_env *env,
1103 struct lu_device *dev,
1104 struct lustre_cfg *lcfg)
1110 static int mgs_object_init(const struct lu_env *env, struct lu_object *o,
1111 const struct lu_object_conf *unused)
1113 struct mgs_device *d = lu2mgs_dev(o->lo_dev);
1114 struct lu_device *under;
1115 struct lu_object *below;
1119 /* do no set .do_ops as mgs calls to bottom osd directly */
1121 CDEBUG(D_INFO, "object init, fid = "DFID"\n",
1122 PFID(lu_object_fid(o)));
1124 under = &d->mgs_bottom->dd_lu_dev;
1125 below = under->ld_ops->ldo_object_alloc(env, o->lo_header, under);
1127 lu_object_add(o, below);
1134 static void mgs_object_free(const struct lu_env *env, struct lu_object *o)
1136 struct mgs_object *obj = lu2mgs_obj(o);
1137 struct lu_object_header *h = o->lo_header;
1139 dt_object_fini(&obj->mgo_obj);
1140 lu_object_header_fini(h);
1144 static int mgs_object_print(const struct lu_env *env, void *cookie,
1145 lu_printer_t p, const struct lu_object *l)
1147 const struct mgs_object *o = lu2mgs_obj((struct lu_object *) l);
1149 return (*p)(env, cookie, LUSTRE_MGS_NAME"-object@%p", o);
1152 struct lu_object_operations mgs_lu_obj_ops = {
1153 .loo_object_init = mgs_object_init,
1154 .loo_object_free = mgs_object_free,
1155 .loo_object_print = mgs_object_print,
1158 struct lu_object *mgs_object_alloc(const struct lu_env *env,
1159 const struct lu_object_header *hdr,
1160 struct lu_device *d)
1162 struct lu_object_header *h;
1163 struct mgs_object *o;
1164 struct lu_object *l;
1166 LASSERT(hdr == NULL);
1170 l = &o->mgo_obj.do_lu;
1173 lu_object_header_init(h);
1174 dt_object_init(&o->mgo_obj, h, d);
1175 lu_object_add_top(h, l);
1177 l->lo_ops = &mgs_lu_obj_ops;
1185 const struct lu_device_operations mgs_lu_ops = {
1186 .ldo_object_alloc = mgs_object_alloc,
1187 .ldo_process_config = mgs_process_config,
1190 static struct lu_device *mgs_device_alloc(const struct lu_env *env,
1191 struct lu_device_type *type,
1192 struct lustre_cfg *lcfg)
1194 struct mgs_device *mgs;
1195 struct lu_device *ludev;
1199 ludev = ERR_PTR(-ENOMEM);
1203 ludev = mgs2lu_dev(mgs);
1204 dt_device_init(&mgs->mgs_dt_dev, type);
1205 rc = mgs_init0(env, mgs, type, lcfg);
1207 mgs_device_free(env, ludev);
1208 ludev = ERR_PTR(rc);
1214 static struct lu_device *mgs_device_fini(const struct lu_env *env,
1215 struct lu_device *d)
1217 struct mgs_device *mgs = lu2mgs_dev(d);
1218 struct obd_device *obd = mgs->mgs_obd;
1219 struct llog_ctxt *ctxt;
1223 LASSERT(mgs->mgs_bottom);
1225 class_disconnect_exports(obd);
1227 ping_evictor_stop();
1229 ptlrpc_unregister_service(mgs->mgs_service);
1231 obd_exports_barrier(obd);
1232 obd_zombie_barrier();
1234 tgt_fini(env, &mgs->mgs_lut);
1235 mgs_cleanup_fsdb_list(mgs);
1236 lproc_mgs_cleanup(mgs);
1238 ctxt = llog_get_context(mgs->mgs_obd, LLOG_CONFIG_ORIG_CTXT);
1240 ctxt->loc_dir = NULL;
1241 llog_cleanup(env, ctxt);
1244 mgs_fs_cleanup(env, mgs);
1246 ldlm_namespace_free(obd->obd_namespace, NULL, 1);
1247 obd->obd_namespace = NULL;
1249 lu_site_purge(env, d->ld_site, ~0);
1250 if (!cfs_hash_is_empty(d->ld_site->ls_obj_hash)) {
1251 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1252 lu_site_print(env, d->ld_site, &msgdata, lu_cdebug_printer);
1255 LASSERT(mgs->mgs_bottom_exp);
1256 obd_disconnect(mgs->mgs_bottom_exp);
1258 server_put_mount(obd->obd_name);
1263 /* context key constructor/destructor: mgs_key_init, mgs_key_fini */
1264 LU_KEY_INIT_FINI(mgs, struct mgs_thread_info);
1266 LU_TYPE_INIT_FINI(mgs, &mgs_thread_key);
1268 LU_CONTEXT_KEY_DEFINE(mgs, LCT_MG_THREAD);
1270 static struct lu_device_type_operations mgs_device_type_ops = {
1271 .ldto_init = mgs_type_init,
1272 .ldto_fini = mgs_type_fini,
1274 .ldto_start = mgs_type_start,
1275 .ldto_stop = mgs_type_stop,
1277 .ldto_device_alloc = mgs_device_alloc,
1278 .ldto_device_free = mgs_device_free,
1280 .ldto_device_fini = mgs_device_fini
1283 static struct lu_device_type mgs_device_type = {
1284 .ldt_tags = LU_DEVICE_DT,
1285 .ldt_name = LUSTRE_MGS_NAME,
1286 .ldt_ops = &mgs_device_type_ops,
1287 .ldt_ctx_tags = LCT_MG_THREAD
1290 static int mgs_obd_connect(const struct lu_env *env, struct obd_export **exp,
1291 struct obd_device *obd, struct obd_uuid *cluuid,
1292 struct obd_connect_data *data, void *localdata)
1294 struct obd_export *lexp;
1295 struct lustre_handle conn = { 0 };
1300 if (exp == NULL || obd == NULL || cluuid == NULL)
1303 rc = class_connect(&conn, obd, cluuid);
1307 lexp = class_conn2export(&conn);
1312 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1313 data->ocd_version = LUSTRE_VERSION_CODE;
1314 lexp->exp_connect_data = *data;
1317 tgt_counter_incr(lexp, LPROC_MGS_CONNECT);
1319 rc = mgs_export_stats_init(obd, lexp, localdata);
1321 class_disconnect(lexp);
1328 static int mgs_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
1329 struct obd_device *obd, struct obd_uuid *cluuid,
1330 struct obd_connect_data *data, void *localdata)
1334 if (exp == NULL || obd == NULL || cluuid == NULL)
1337 tgt_counter_incr(exp, LPROC_MGS_CONNECT);
1340 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
1341 data->ocd_version = LUSTRE_VERSION_CODE;
1342 exp->exp_connect_data = *data;
1345 RETURN(mgs_export_stats_init(obd, exp, localdata));
1348 static int mgs_obd_disconnect(struct obd_export *exp)
1356 mgs_fsc_cleanup(exp);
1358 class_export_get(exp);
1359 tgt_counter_incr(exp, LPROC_MGS_DISCONNECT);
1361 rc = server_disconnect_export(exp);
1362 class_export_put(exp);
1366 /* use obd ops to offer management infrastructure */
1367 static struct obd_ops mgs_obd_device_ops = {
1368 .o_owner = THIS_MODULE,
1369 .o_connect = mgs_obd_connect,
1370 .o_reconnect = mgs_obd_reconnect,
1371 .o_disconnect = mgs_obd_disconnect,
1372 .o_init_export = mgs_init_export,
1373 .o_destroy_export = mgs_destroy_export,
1374 .o_iocontrol = mgs_iocontrol,
1377 static int __init mgs_init(void)
1379 struct lprocfs_static_vars lvars;
1381 lprocfs_mgs_init_vars(&lvars);
1382 return class_register_type(&mgs_obd_device_ops, NULL, NULL,
1383 #ifndef HAVE_ONLY_PROCFS_SEQ
1386 LUSTRE_MGS_NAME, &mgs_device_type);
1389 static void /*__exit*/ mgs_exit(void)
1391 class_unregister_type(LUSTRE_MGS_NAME);
1394 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1395 MODULE_DESCRIPTION("Lustre Management Server (MGS)");
1396 MODULE_LICENSE("GPL");
1398 module_init(mgs_init);
1399 module_exit(mgs_exit);