1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
30 * Use is subject to license terms.
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>
42 # define EXPORT_SYMTAB
44 #define DEBUG_SUBSYSTEM S_MGS
45 #define D_MGS D_CONFIG
48 # include <linux/module.h>
49 # include <linux/pagemap.h>
50 # include <linux/miscdevice.h>
51 # include <linux/init.h>
53 # include <liblustre.h>
56 #include <obd_class.h>
57 #include <lustre_dlm.h>
58 #include <lprocfs_status.h>
59 #include <lustre_fsfilt.h>
60 #include <lustre_disk.h>
61 #include "mgs_internal.h"
62 #include <lustre_param.h>
64 /* Establish a connection to the MGS.*/
65 static int mgs_connect(const struct lu_env *env,
66 struct obd_export **exp, struct obd_device *obd,
67 struct obd_uuid *cluuid, struct obd_connect_data *data,
70 struct obd_export *lexp;
71 struct lustre_handle conn = { 0 };
75 if (!exp || !obd || !cluuid)
78 rc = class_connect(&conn, obd, cluuid);
82 lexp = class_conn2export(&conn);
85 mgs_counter_incr(lexp, LPROC_MGS_CONNECT);
88 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
89 lexp->exp_connect_flags = data->ocd_connect_flags;
90 data->ocd_version = LUSTRE_VERSION_CODE;
93 rc = mgs_export_stats_init(obd, lexp, localdata);
96 class_disconnect(lexp);
104 static int mgs_reconnect(const struct lu_env *env,
105 struct obd_export *exp, struct obd_device *obd,
106 struct obd_uuid *cluuid, struct obd_connect_data *data,
111 if (exp == NULL || obd == NULL || cluuid == NULL)
114 mgs_counter_incr(exp, LPROC_MGS_CONNECT);
117 data->ocd_connect_flags &= MGS_CONNECT_SUPPORTED;
118 exp->exp_connect_flags = data->ocd_connect_flags;
119 data->ocd_version = LUSTRE_VERSION_CODE;
122 RETURN(mgs_export_stats_init(obd, exp, localdata));
125 static int mgs_disconnect(struct obd_export *exp)
132 class_export_get(exp);
133 mgs_counter_incr(exp, LPROC_MGS_DISCONNECT);
135 rc = server_disconnect_export(exp);
137 class_export_put(exp);
141 static int mgs_cleanup(struct obd_device *obd);
142 static int mgs_handle(struct ptlrpc_request *req);
144 static int mgs_llog_init(struct obd_device *obd, struct obd_llog_group *olg,
145 struct obd_device *tgt, int *index)
150 LASSERT(olg == &obd->obd_olg);
151 rc = llog_setup(obd, olg, LLOG_CONFIG_ORIG_CTXT, obd, 0, NULL,
156 static int mgs_llog_finish(struct obd_device *obd, int count)
158 struct llog_ctxt *ctxt;
162 ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
164 rc = llog_cleanup(ctxt);
169 /* Start the MGS obd */
170 static int mgs_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
172 struct lprocfs_static_vars lvars;
173 struct mgs_obd *mgs = &obd->u.mgs;
174 struct lustre_mount_info *lmi;
175 struct lustre_sb_info *lsi;
176 struct vfsmount *mnt;
180 CDEBUG(D_CONFIG, "Starting MGS\n");
183 lmi = server_get_mount(obd->obd_name);
185 RETURN(rc = -EINVAL);
188 lsi = s2lsi(lmi->lmi_sb);
189 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
190 if (IS_ERR(obd->obd_fsops))
191 GOTO(err_put, rc = PTR_ERR(obd->obd_fsops));
193 if (lvfs_check_rdonly(lvfs_sbdev(mnt->mnt_sb))) {
194 CERROR("%s: Underlying device is marked as read-only. "
195 "Setup failed\n", obd->obd_name);
196 GOTO(err_ops, rc = -EROFS);
199 /* namespace for mgs llog */
200 obd->obd_namespace = ldlm_namespace_new(obd ,"MGS",
201 LDLM_NAMESPACE_SERVER,
202 LDLM_NAMESPACE_MODEST,
204 if (obd->obd_namespace == NULL)
205 GOTO(err_ops, rc = -ENOMEM);
208 ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
209 "mgs_ldlm_client", &obd->obd_ldlm_client);
211 rc = mgs_fs_setup(obd, mnt);
213 CERROR("%s: MGS filesystem method init failed: rc = %d\n",
218 rc = obd_llog_init(obd, &obd->obd_olg, obd, NULL);
222 /* No recovery for MGC's */
223 obd->obd_replayable = 0;
225 /* Internal mgs setup */
226 mgs_init_fsdb_list(obd);
227 cfs_sema_init(&mgs->mgs_sem, 1);
230 lprocfs_mgs_init_vars(&lvars);
231 if (lprocfs_obd_setup(obd, lvars.obd_vars) == 0) {
232 lproc_mgs_setup(obd);
233 rc = lprocfs_alloc_md_stats(obd, LPROC_MGS_LAST);
238 /* Start the service threads */
240 ptlrpc_init_svc(MGS_NBUFS, MGS_BUFSIZE, MGS_MAXREQSIZE,
241 MGS_MAXREPSIZE, MGS_REQUEST_PORTAL,
243 mgs_handle, LUSTRE_MGS_NAME,
244 obd->obd_proc_entry, target_print_req,
245 MGS_THREADS_AUTO_MIN, MGS_THREADS_AUTO_MAX,
246 "ll_mgs", LCT_MD_THREAD, NULL);
248 if (!mgs->mgs_service) {
249 CERROR("failed to start service\n");
250 GOTO(err_llog, rc = -ENOMEM);
253 rc = ptlrpc_start_threads(mgs->mgs_service);
255 GOTO(err_thread, rc);
257 ping_evictor_start();
259 LCONSOLE_INFO("MGS %s started\n", obd->obd_name);
264 ptlrpc_unregister_service(mgs->mgs_service);
266 lproc_mgs_cleanup(obd);
267 obd_llog_finish(obd, 0);
269 /* No extra cleanup needed for llog_init_commit_thread() */
272 ldlm_namespace_free(obd->obd_namespace, NULL, 0);
273 obd->obd_namespace = NULL;
275 fsfilt_put_ops(obd->obd_fsops);
277 server_put_mount(obd->obd_name, mnt);
282 static int mgs_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
288 case OBD_CLEANUP_EARLY:
289 case OBD_CLEANUP_EXPORTS:
290 rc = obd_llog_finish(obd, 0);
297 * Performs cleanup procedures for passed \a obd given it is mgs obd.
299 static int mgs_cleanup(struct obd_device *obd)
301 struct mgs_obd *mgs = &obd->u.mgs;
304 if (mgs->mgs_sb == NULL)
309 ptlrpc_unregister_service(mgs->mgs_service);
311 mgs_cleanup_fsdb_list(obd);
312 lproc_mgs_cleanup(obd);
315 server_put_mount(obd->obd_name, mgs->mgs_vfsmnt);
318 ldlm_namespace_free(obd->obd_namespace, NULL, 1);
319 obd->obd_namespace = NULL;
321 fsfilt_put_ops(obd->obd_fsops);
323 LCONSOLE_INFO("%s has stopped.\n", obd->obd_name);
327 /* similar to filter_prepare_destroy */
328 static int mgs_get_cfg_lock(struct obd_device *obd, char *fsname,
329 struct lustre_handle *lockh)
331 struct ldlm_res_id res_id;
335 rc = mgc_fsname2resid(fsname, &res_id);
337 rc = ldlm_cli_enqueue_local(obd->obd_namespace, &res_id,
338 LDLM_PLAIN, NULL, LCK_EX,
339 &flags, ldlm_blocking_ast,
340 ldlm_completion_ast, NULL,
341 fsname, 0, NULL, lockh);
343 CERROR("can't take cfg lock for %s (%d)\n", fsname, rc);
348 static int mgs_put_cfg_lock(struct lustre_handle *lockh)
351 ldlm_lock_decref(lockh, LCK_EX);
355 void mgs_revoke_lock(struct obd_device *obd, struct fs_db *fsdb)
357 struct lustre_handle lockh;
360 LASSERT(fsdb->fsdb_name[0] != '\0');
362 if (cfs_test_and_set_bit(FSDB_REVOKING_LOCK, &fsdb->fsdb_flags) == 0) {
363 lockrc = mgs_get_cfg_lock(obd, fsdb->fsdb_name, &lockh);
364 /* clear the bit before lock put */
365 cfs_clear_bit(FSDB_REVOKING_LOCK, &fsdb->fsdb_flags);
367 if (lockrc != ELDLM_OK)
368 CERROR("lock error %d for fs %s\n",
369 lockrc, fsdb->fsdb_name);
371 mgs_put_cfg_lock(&lockh);
378 static int mgs_check_target(struct obd_device *obd, struct mgs_target_info *mti)
383 rc = mgs_check_index(obd, mti);
385 LCONSOLE_ERROR_MSG(0x13b, "%s claims to have registered, but "
386 "this MGS does not know about it, preventing "
387 "registration.\n", mti->mti_svname);
389 } else if (rc == -1) {
390 LCONSOLE_ERROR_MSG(0x13c, "Client log %s-client has "
391 "disappeared! Regenerating all logs.\n",
393 mti->mti_flags |= LDD_F_WRITECONF;
396 /* Index is correctly marked as used */
398 /* If the logs don't contain the mti_nids then add
399 them as failover nids */
400 rc = mgs_check_failnid(obd, mti);
406 /* Ensure this is not a failover node that is connecting first*/
407 static int mgs_check_failover_reg(struct mgs_target_info *mti)
413 ptr = mti->mti_params;
414 while (class_find_param(ptr, PARAM_FAILNODE, &ptr) == 0) {
415 while (class_parse_nid(ptr, &nid, &ptr) == 0) {
416 for (i = 0; i < mti->mti_nid_count; i++) {
417 if (nid == mti->mti_nids[i]) {
418 LCONSOLE_WARN("Denying initial registra"
419 "tion attempt from nid %s"
420 ", specified as failover"
421 "\n",libcfs_nid2str(nid));
422 return -EADDRNOTAVAIL;
430 /* Called whenever a target starts up. Flags indicate first connect, etc. */
431 static int mgs_handle_target_reg(struct ptlrpc_request *req)
433 struct obd_device *obd = req->rq_export->exp_obd;
434 struct mgs_target_info *mti, *rep_mti;
439 mgs_counter_incr(req->rq_export, LPROC_MGS_TARGET_REG);
441 mti = req_capsule_client_get(&req->rq_pill, &RMF_MGS_TARGET_INFO);
443 if (mti->mti_flags & LDD_F_NEED_INDEX)
444 mti->mti_flags |= LDD_F_WRITECONF;
446 if (!(mti->mti_flags & (LDD_F_WRITECONF | LDD_F_UPGRADE14 |
448 /* We're just here as a startup ping. */
449 CDEBUG(D_MGS, "Server %s is running on %s\n",
450 mti->mti_svname, obd_export_nid2str(req->rq_export));
451 rc = mgs_check_target(obd, mti);
452 /* above will set appropriate mti flags */
454 /* Nothing wrong, or fatal error */
455 GOTO(out_nolock, rc);
457 if ((rc = mgs_check_failover_reg(mti)))
458 GOTO(out_nolock, rc);
461 OBD_FAIL_TIMEOUT(OBD_FAIL_MGS_PAUSE_TARGET_REG, 10);
463 if (mti->mti_flags & LDD_F_WRITECONF) {
464 if (mti->mti_flags & LDD_F_SV_TYPE_MDT &&
465 mti->mti_stripe_index == 0) {
466 rc = mgs_erase_logs(obd, mti->mti_fsname);
467 LCONSOLE_WARN("%s: Logs for fs %s were removed by user "
468 "request. All servers must be restarted "
469 "in order to regenerate the logs."
470 "\n", obd->obd_name, mti->mti_fsname);
471 } else if (mti->mti_flags &
472 (LDD_F_SV_TYPE_OST | LDD_F_SV_TYPE_MDT)) {
473 rc = mgs_erase_log(obd, mti->mti_svname);
474 LCONSOLE_WARN("%s: Regenerating %s log by user "
476 obd->obd_name, mti->mti_svname);
478 mti->mti_flags |= LDD_F_UPDATE;
479 /* Erased logs means start from scratch. */
480 mti->mti_flags &= ~LDD_F_UPGRADE14;
483 rc = mgs_find_or_make_fsdb(obd, mti->mti_fsname, &fsdb);
485 CERROR("Can't get db for %s: %d\n", mti->mti_fsname, rc);
486 GOTO(out_nolock, rc);
490 * Log writing contention is handled by the fsdb_sem.
492 * It should be alright if someone was reading while we were
493 * updating the logs - if we revoke at the end they will just update
494 * from where they left off.
498 if (mti->mti_flags & LDD_F_UPGRADE14) {
499 rc = mgs_upgrade_sv_14(obd, mti, fsdb);
501 CERROR("Can't upgrade from 1.4 (%d)\n", rc);
505 /* We're good to go */
506 mti->mti_flags |= LDD_F_UPDATE;
510 if (mti->mti_flags & LDD_F_UPDATE) {
511 CDEBUG(D_MGS, "updating %s, index=%d\n", mti->mti_svname,
512 mti->mti_stripe_index);
514 /* create or update the target log
515 and update the client/mdt logs */
516 rc = mgs_write_log_target(obd, mti, fsdb);
518 CERROR("Failed to write %s log (%d)\n",
519 mti->mti_svname, rc);
523 mti->mti_flags &= ~(LDD_F_VIRGIN | LDD_F_UPDATE |
524 LDD_F_NEED_INDEX | LDD_F_WRITECONF |
526 mti->mti_flags |= LDD_F_REWRITE_LDD;
530 mgs_revoke_lock(obd, fsdb);
533 CDEBUG(D_MGS, "replying with %s, index=%d, rc=%d\n", mti->mti_svname,
534 mti->mti_stripe_index, rc);
536 rc = req_capsule_server_pack(&req->rq_pill);
540 /* send back the whole mti in the reply */
541 rep_mti = req_capsule_server_get(&req->rq_pill, &RMF_MGS_TARGET_INFO);
544 /* Flush logs to disk */
545 fsfilt_sync(obd, obd->u.mgs.mgs_sb);
549 static int mgs_set_info_rpc(struct ptlrpc_request *req)
551 struct obd_device *obd = req->rq_export->exp_obd;
552 struct mgs_send_param *msp, *rep_msp;
554 struct lustre_cfg_bufs bufs;
555 struct lustre_cfg *lcfg;
556 char fsname[MTI_NAME_MAXLEN];
559 msp = req_capsule_client_get(&req->rq_pill, &RMF_MGS_SEND_PARAM);
562 /* Construct lustre_cfg structure to pass to function mgs_setparam */
563 lustre_cfg_bufs_reset(&bufs, NULL);
564 lustre_cfg_bufs_set_string(&bufs, 1, msp->mgs_param);
565 lcfg = lustre_cfg_new(LCFG_PARAM, &bufs);
566 rc = mgs_setparam(obd, lcfg, fsname);
568 CERROR("Error %d in setting the parameter %s for fs %s\n",
569 rc, msp->mgs_param, fsname);
573 lustre_cfg_free(lcfg);
575 rc = req_capsule_server_pack(&req->rq_pill);
577 rep_msp = req_capsule_server_get(&req->rq_pill, &RMF_MGS_SEND_PARAM);
584 * similar as in ost_connect_check_sptlrpc()
586 static int mgs_connect_check_sptlrpc(struct ptlrpc_request *req)
588 struct obd_export *exp = req->rq_export;
589 struct obd_device *obd = exp->exp_obd;
591 struct sptlrpc_flavor flvr;
594 if (exp->exp_flvr.sf_rpc == SPTLRPC_FLVR_INVALID) {
595 rc = mgs_find_or_make_fsdb(obd, MGSSELF_NAME, &fsdb);
599 cfs_down(&fsdb->fsdb_sem);
600 if (sptlrpc_rule_set_choose(&fsdb->fsdb_srpc_gen,
601 LUSTRE_SP_MGC, LUSTRE_SP_MGS,
604 /* by defualt allow any flavors */
605 flvr.sf_rpc = SPTLRPC_FLVR_ANY;
607 cfs_up(&fsdb->fsdb_sem);
609 cfs_spin_lock(&exp->exp_lock);
611 exp->exp_sp_peer = req->rq_sp_from;
612 exp->exp_flvr = flvr;
614 if (exp->exp_flvr.sf_rpc != SPTLRPC_FLVR_ANY &&
615 exp->exp_flvr.sf_rpc != req->rq_flvr.sf_rpc) {
616 CERROR("invalid rpc flavor %x, expect %x, from %s\n",
617 req->rq_flvr.sf_rpc, exp->exp_flvr.sf_rpc,
618 libcfs_nid2str(req->rq_peer.nid));
622 cfs_spin_unlock(&exp->exp_lock);
624 if (exp->exp_sp_peer != req->rq_sp_from) {
625 CERROR("RPC source %s doesn't match %s\n",
626 sptlrpc_part2name(req->rq_sp_from),
627 sptlrpc_part2name(exp->exp_sp_peer));
630 rc = sptlrpc_target_export_check(exp, req);
637 /* Called whenever a target cleans up. */
638 /* XXX - Currently unused */
639 static int mgs_handle_target_del(struct ptlrpc_request *req)
642 mgs_counter_incr(req->rq_export, LPROC_MGS_TARGET_DEL);
646 /* XXX - Currently unused */
647 static int mgs_handle_exception(struct ptlrpc_request *req)
650 mgs_counter_incr(req->rq_export, LPROC_MGS_EXCEPTION);
654 /* TODO: handle requests in a similar way as MDT: see mdt_handle_common() */
655 int mgs_handle(struct ptlrpc_request *req)
657 int fail = OBD_FAIL_MGS_ALL_REPLY_NET;
661 req_capsule_init(&req->rq_pill, req, RCL_SERVER);
662 OBD_FAIL_TIMEOUT_MS(OBD_FAIL_MGS_PAUSE_REQ, obd_fail_val);
663 if (OBD_FAIL_CHECK(OBD_FAIL_MGS_ALL_REQUEST_NET))
666 LASSERT(current->journal_info == NULL);
667 opc = lustre_msg_get_opc(req->rq_reqmsg);
669 if (opc == SEC_CTX_INIT ||
670 opc == SEC_CTX_INIT_CONT ||
674 if (opc != MGS_CONNECT) {
675 if (!class_connected_export(req->rq_export)) {
676 CERROR("lustre_mgs: operation %d on unconnected MGS\n",
678 req->rq_status = -ENOTCONN;
679 GOTO(out, rc = -ENOTCONN);
685 DEBUG_REQ(D_MGS, req, "connect");
686 /* MGS and MDS have same request format for connect */
687 req_capsule_set(&req->rq_pill, &RQF_MDS_CONNECT);
688 rc = target_handle_connect(req);
690 rc = mgs_connect_check_sptlrpc(req);
692 if (!rc && (lustre_msg_get_conn_cnt(req->rq_reqmsg) > 1))
693 /* Make clients trying to reconnect after a MGS restart
694 happy; also requires obd_replayable */
695 lustre_msg_add_op_flags(req->rq_repmsg,
696 MSG_CONNECT_RECONNECT);
699 DEBUG_REQ(D_MGS, req, "disconnect");
700 /* MGS and MDS have same request format for disconnect */
701 req_capsule_set(&req->rq_pill, &RQF_MDS_DISCONNECT);
702 rc = target_handle_disconnect(req);
703 req->rq_status = rc; /* superfluous? */
706 DEBUG_REQ(D_MGS, req, "exception");
707 rc = mgs_handle_exception(req);
710 DEBUG_REQ(D_MGS, req, "target add");
711 req_capsule_set(&req->rq_pill, &RQF_MGS_TARGET_REG);
712 rc = mgs_handle_target_reg(req);
715 DEBUG_REQ(D_MGS, req, "target del");
716 rc = mgs_handle_target_del(req);
719 DEBUG_REQ(D_MGS, req, "set_info");
720 req_capsule_set(&req->rq_pill, &RQF_MGS_SET_INFO);
721 rc = mgs_set_info_rpc(req);
725 DEBUG_REQ(D_MGS, req, "enqueue");
726 req_capsule_set(&req->rq_pill, &RQF_LDLM_ENQUEUE);
727 rc = ldlm_handle_enqueue(req, ldlm_server_completion_ast,
728 ldlm_server_blocking_ast, NULL);
730 case LDLM_BL_CALLBACK:
731 case LDLM_CP_CALLBACK:
732 DEBUG_REQ(D_MGS, req, "callback");
733 CERROR("callbacks should not happen on MGS\n");
738 DEBUG_REQ(D_INFO, req, "ping");
739 req_capsule_set(&req->rq_pill, &RQF_OBD_PING);
740 rc = target_handle_ping(req);
743 DEBUG_REQ(D_MGS, req, "log cancel");
744 rc = -ENOTSUPP; /* la la la */
747 case LLOG_ORIGIN_HANDLE_CREATE:
748 DEBUG_REQ(D_MGS, req, "llog_init");
749 req_capsule_set(&req->rq_pill, &RQF_LLOG_ORIGIN_HANDLE_CREATE);
750 rc = llog_origin_handle_create(req);
752 case LLOG_ORIGIN_HANDLE_NEXT_BLOCK:
753 DEBUG_REQ(D_MGS, req, "llog next block");
754 req_capsule_set(&req->rq_pill,
755 &RQF_LLOG_ORIGIN_HANDLE_NEXT_BLOCK);
756 rc = llog_origin_handle_next_block(req);
758 case LLOG_ORIGIN_HANDLE_READ_HEADER:
759 DEBUG_REQ(D_MGS, req, "llog read header");
760 req_capsule_set(&req->rq_pill,
761 &RQF_LLOG_ORIGIN_HANDLE_READ_HEADER);
762 rc = llog_origin_handle_read_header(req);
764 case LLOG_ORIGIN_HANDLE_CLOSE:
765 DEBUG_REQ(D_MGS, req, "llog close");
766 rc = llog_origin_handle_close(req);
769 DEBUG_REQ(D_MGS, req, "llog catinfo");
770 req_capsule_set(&req->rq_pill, &RQF_LLOG_CATINFO);
771 rc = llog_catinfo(req);
774 req->rq_status = -ENOTSUPP;
775 rc = ptlrpc_error(req);
779 LASSERT(current->journal_info == NULL);
782 CERROR("MGS handle cmd=%d rc=%d\n", opc, rc);
785 target_send_reply(req, rc, fail);
789 static inline int mgs_init_export(struct obd_export *exp)
791 cfs_spin_lock(&exp->exp_lock);
792 exp->exp_connecting = 1;
793 cfs_spin_unlock(&exp->exp_lock);
795 return ldlm_init_export(exp);
798 static inline int mgs_destroy_export(struct obd_export *exp)
802 target_destroy_export(exp);
803 mgs_client_free(exp);
804 ldlm_destroy_export(exp);
809 static int mgs_extract_fs_pool(char * arg, char *fsname, char *poolname)
814 for (ptr = arg; (*ptr != '\0') && (*ptr != '.'); ptr++ ) {
822 strcpy(poolname, ptr);
827 static int mgs_iocontrol_pool(struct obd_device *obd,
828 struct obd_ioctl_data *data)
831 struct lustre_cfg *lcfg = NULL;
832 struct llog_rec_hdr rec;
834 char *poolname = NULL;
837 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
841 OBD_ALLOC(poolname, LOV_MAXPOOLNAME + 1);
842 if (poolname == NULL) {
846 rec.lrh_len = llog_data_len(data->ioc_plen1);
848 if (data->ioc_type == LUSTRE_CFG_TYPE) {
849 rec.lrh_type = OBD_CFG_REC;
851 CERROR("unknown cfg record type:%d \n", data->ioc_type);
856 if (data->ioc_plen1 > CFS_PAGE_SIZE) {
861 OBD_ALLOC(lcfg, data->ioc_plen1);
863 GOTO(out_pool, rc = -ENOMEM);
865 if (cfs_copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
866 GOTO(out_pool, rc = -EFAULT);
868 if (lcfg->lcfg_bufcount < 2) {
869 GOTO(out_pool, rc = -EFAULT);
872 /* first arg is always <fsname>.<poolname> */
873 mgs_extract_fs_pool(lustre_cfg_string(lcfg, 1), fsname,
876 switch (lcfg->lcfg_command) {
877 case LCFG_POOL_NEW: {
878 if (lcfg->lcfg_bufcount != 2)
880 rc = mgs_pool_cmd(obd, LCFG_POOL_NEW, fsname,
884 case LCFG_POOL_ADD: {
885 if (lcfg->lcfg_bufcount != 3)
887 rc = mgs_pool_cmd(obd, LCFG_POOL_ADD, fsname, poolname,
888 lustre_cfg_string(lcfg, 2));
891 case LCFG_POOL_REM: {
892 if (lcfg->lcfg_bufcount != 3)
894 rc = mgs_pool_cmd(obd, LCFG_POOL_REM, fsname, poolname,
895 lustre_cfg_string(lcfg, 2));
898 case LCFG_POOL_DEL: {
899 if (lcfg->lcfg_bufcount != 2)
901 rc = mgs_pool_cmd(obd, LCFG_POOL_DEL, fsname,
912 CERROR("OBD_IOC_POOL err %d, cmd %X for pool %s.%s\n",
913 rc, lcfg->lcfg_command, fsname, poolname);
919 OBD_FREE(lcfg, data->ioc_plen1);
922 OBD_FREE(fsname, MTI_NAME_MAXLEN);
924 if (poolname != NULL)
925 OBD_FREE(poolname, LOV_MAXPOOLNAME + 1);
930 /* from mdt_iocontrol */
931 int mgs_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
932 void *karg, void *uarg)
934 struct obd_device *obd = exp->exp_obd;
935 struct obd_ioctl_data *data = karg;
936 struct lvfs_run_ctxt saved;
940 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
944 case OBD_IOC_PARAM: {
945 struct lustre_cfg *lcfg;
946 struct llog_rec_hdr rec;
947 char fsname[MTI_NAME_MAXLEN];
949 rec.lrh_len = llog_data_len(data->ioc_plen1);
951 if (data->ioc_type == LUSTRE_CFG_TYPE) {
952 rec.lrh_type = OBD_CFG_REC;
954 CERROR("unknown cfg record type:%d \n", data->ioc_type);
958 OBD_ALLOC(lcfg, data->ioc_plen1);
961 if (cfs_copy_from_user(lcfg, data->ioc_pbuf1, data->ioc_plen1))
962 GOTO(out_free, rc = -EFAULT);
964 if (lcfg->lcfg_bufcount < 1)
965 GOTO(out_free, rc = -EINVAL);
967 rc = mgs_setparam(obd, lcfg, fsname);
969 CERROR("setparam err %d\n", rc);
973 OBD_FREE(lcfg, data->ioc_plen1);
978 RETURN(mgs_iocontrol_pool(obd, data));
981 case OBD_IOC_DUMP_LOG: {
982 struct llog_ctxt *ctxt;
983 ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
984 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
985 rc = class_config_dump_llog(ctxt, data->ioc_inlbuf1, NULL);
986 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
992 case OBD_IOC_LLOG_CHECK:
993 case OBD_IOC_LLOG_INFO:
994 case OBD_IOC_LLOG_PRINT: {
995 struct llog_ctxt *ctxt;
996 ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
998 push_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
999 rc = llog_ioctl(ctxt, cmd, data);
1000 pop_ctxt(&saved, &ctxt->loc_exp->exp_obd->obd_lvfs_ctxt, NULL);
1001 llog_ctxt_put(ctxt);
1007 CDEBUG(D_INFO, "unknown command %x\n", cmd);
1013 /* use obd ops to offer management infrastructure */
1014 static struct obd_ops mgs_obd_ops = {
1015 .o_owner = THIS_MODULE,
1016 .o_connect = mgs_connect,
1017 .o_reconnect = mgs_reconnect,
1018 .o_disconnect = mgs_disconnect,
1019 .o_setup = mgs_setup,
1020 .o_precleanup = mgs_precleanup,
1021 .o_cleanup = mgs_cleanup,
1022 .o_init_export = mgs_init_export,
1023 .o_destroy_export = mgs_destroy_export,
1024 .o_iocontrol = mgs_iocontrol,
1025 .o_llog_init = mgs_llog_init,
1026 .o_llog_finish = mgs_llog_finish
1029 static int __init mgs_init(void)
1031 struct lprocfs_static_vars lvars;
1033 lprocfs_mgs_init_vars(&lvars);
1034 class_register_type(&mgs_obd_ops, NULL,
1035 lvars.module_vars, LUSTRE_MGS_NAME, NULL);
1040 static void /*__exit*/ mgs_exit(void)
1042 class_unregister_type(LUSTRE_MGS_NAME);
1045 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1046 MODULE_DESCRIPTION("Lustre Management Server (MGS)");
1047 MODULE_LICENSE("GPL");
1049 module_init(mgs_init);
1050 module_exit(mgs_exit);