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) 2011, 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/mgc/mgc_request.c
38 * Author: Nathan Rutman <nathan@clusterfs.com>
41 #define DEBUG_SUBSYSTEM S_MGC
42 #define D_MGC D_CONFIG /*|D_WARNING*/
44 #include <linux/module.h>
45 #include "../include/obd_class.h"
46 #include "../include/lustre_dlm.h"
47 #include "../include/lprocfs_status.h"
48 #include "../include/lustre_log.h"
49 #include "../include/lustre_disk.h"
51 #include "mgc_internal.h"
53 static int mgc_name2resid(char *name, int len, struct ldlm_res_id *res_id,
58 if (len > sizeof(resname)) {
59 CERROR("name too long: %s\n", name);
63 CERROR("missing name: %s\n", name);
66 memcpy(&resname, name, len);
68 /* Always use the same endianness for the resid */
69 memset(res_id, 0, sizeof(*res_id));
70 res_id->name[0] = cpu_to_le64(resname);
71 /* XXX: unfortunately, sptlprc and config llog share one lock */
74 case CONFIG_T_SPTLRPC:
77 case CONFIG_T_RECOVER:
84 res_id->name[1] = cpu_to_le64(resname);
85 CDEBUG(D_MGC, "log %s to resid %#llx/%#llx (%.8s)\n", name,
86 res_id->name[0], res_id->name[1], (char *)&res_id->name[0]);
90 int mgc_fsname2resid(char *fsname, struct ldlm_res_id *res_id, int type)
92 /* fsname is at most 8 chars long, maybe contain "-".
93 * e.g. "lustre", "SUN-000"
95 return mgc_name2resid(fsname, strlen(fsname), res_id, type);
97 EXPORT_SYMBOL(mgc_fsname2resid);
99 static int mgc_logname2resid(char *logname, struct ldlm_res_id *res_id, int type)
104 /* logname consists of "fsname-nodetype".
105 * e.g. "lustre-MDT0001", "SUN-000-client"
106 * there is an exception: llog "params"
108 name_end = strrchr(logname, '-');
110 len = strlen(logname);
112 len = name_end - logname;
113 return mgc_name2resid(logname, len, res_id, type);
116 /********************** config llog list **********************/
117 static LIST_HEAD(config_llog_list);
118 static DEFINE_SPINLOCK(config_list_lock);
120 /* Take a reference to a config log */
121 static int config_log_get(struct config_llog_data *cld)
123 atomic_inc(&cld->cld_refcount);
124 CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname,
125 atomic_read(&cld->cld_refcount));
129 /* Drop a reference to a config log. When no longer referenced,
130 * we can free the config log data
132 static void config_log_put(struct config_llog_data *cld)
134 CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname,
135 atomic_read(&cld->cld_refcount));
136 LASSERT(atomic_read(&cld->cld_refcount) > 0);
138 /* spinlock to make sure no item with 0 refcount in the list */
139 if (atomic_dec_and_lock(&cld->cld_refcount, &config_list_lock)) {
140 list_del(&cld->cld_list_chain);
141 spin_unlock(&config_list_lock);
143 CDEBUG(D_MGC, "dropping config log %s\n", cld->cld_logname);
145 if (cld->cld_recover)
146 config_log_put(cld->cld_recover);
147 if (cld->cld_sptlrpc)
148 config_log_put(cld->cld_sptlrpc);
150 config_log_put(cld->cld_params);
151 if (cld_is_sptlrpc(cld))
152 sptlrpc_conf_log_stop(cld->cld_logname);
154 class_export_put(cld->cld_mgcexp);
159 /* Find a config log by name */
161 struct config_llog_data *config_log_find(char *logname,
162 struct config_llog_instance *cfg)
164 struct config_llog_data *cld;
165 struct config_llog_data *found = NULL;
170 instance = cfg ? cfg->cfg_instance : NULL;
171 spin_lock(&config_list_lock);
172 list_for_each_entry(cld, &config_llog_list, cld_list_chain) {
173 /* check if instance equals */
174 if (instance != cld->cld_cfg.cfg_instance)
177 /* instance may be NULL, should check name */
178 if (strcmp(logname, cld->cld_logname) == 0) {
184 atomic_inc(&found->cld_refcount);
185 LASSERT(found->cld_stopping == 0 || cld_is_sptlrpc(found) == 0);
187 spin_unlock(&config_list_lock);
192 struct config_llog_data *do_config_log_add(struct obd_device *obd,
195 struct config_llog_instance *cfg,
196 struct super_block *sb)
198 struct config_llog_data *cld;
201 CDEBUG(D_MGC, "do adding config log %s:%p\n", logname,
202 cfg ? cfg->cfg_instance : NULL);
204 cld = kzalloc(sizeof(*cld) + strlen(logname) + 1, GFP_NOFS);
206 return ERR_PTR(-ENOMEM);
208 strcpy(cld->cld_logname, logname);
212 cld->cld_cfg.cfg_callback = class_config_llog_handler;
213 mutex_init(&cld->cld_lock);
214 cld->cld_cfg.cfg_last_idx = 0;
215 cld->cld_cfg.cfg_flags = 0;
216 cld->cld_cfg.cfg_sb = sb;
217 cld->cld_type = type;
218 atomic_set(&cld->cld_refcount, 1);
220 /* Keep the mgc around until we are done */
221 cld->cld_mgcexp = class_export_get(obd->obd_self_export);
223 if (cld_is_sptlrpc(cld)) {
224 sptlrpc_conf_log_start(logname);
225 cld->cld_cfg.cfg_obdname = obd->obd_name;
228 rc = mgc_logname2resid(logname, &cld->cld_resid, type);
230 spin_lock(&config_list_lock);
231 list_add(&cld->cld_list_chain, &config_llog_list);
232 spin_unlock(&config_list_lock);
239 if (cld_is_sptlrpc(cld)) {
240 rc = mgc_process_log(obd, cld);
241 if (rc && rc != -ENOENT)
242 CERROR("failed processing sptlrpc log: %d\n", rc);
248 static struct config_llog_data *
249 config_recover_log_add(struct obd_device *obd, char *fsname,
250 struct config_llog_instance *cfg,
251 struct super_block *sb)
253 struct config_llog_instance lcfg = *cfg;
254 struct config_llog_data *cld;
257 /* we have to use different llog for clients and mdts for cmd
258 * where only clients are notified if one of cmd server restarts
260 LASSERT(strlen(fsname) < sizeof(logname) / 2);
261 strcpy(logname, fsname);
262 LASSERT(lcfg.cfg_instance);
263 strcat(logname, "-cliir");
265 cld = do_config_log_add(obd, logname, CONFIG_T_RECOVER, &lcfg, sb);
269 static struct config_llog_data *
270 config_params_log_add(struct obd_device *obd,
271 struct config_llog_instance *cfg, struct super_block *sb)
273 struct config_llog_instance lcfg = *cfg;
274 struct config_llog_data *cld;
276 lcfg.cfg_instance = sb;
278 cld = do_config_log_add(obd, PARAMS_FILENAME, CONFIG_T_PARAMS,
284 /** Add this log to the list of active logs watched by an MGC.
285 * Active means we're watching for updates.
286 * We have one active log per "mount" - client instance or servername.
287 * Each instance may be at a different point in the log.
289 static int config_log_add(struct obd_device *obd, char *logname,
290 struct config_llog_instance *cfg,
291 struct super_block *sb)
293 struct lustre_sb_info *lsi = s2lsi(sb);
294 struct config_llog_data *cld;
295 struct config_llog_data *sptlrpc_cld;
296 struct config_llog_data *params_cld;
301 CDEBUG(D_MGC, "adding config log %s:%p\n", logname, cfg->cfg_instance);
304 * for each regular log, the depended sptlrpc log name is
305 * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log.
307 ptr = strrchr(logname, '-');
308 if (!ptr || ptr - logname > 8) {
309 CERROR("logname %s is too long\n", logname);
313 memcpy(seclogname, logname, ptr - logname);
314 strcpy(seclogname + (ptr - logname), "-sptlrpc");
316 sptlrpc_cld = config_log_find(seclogname, NULL);
318 sptlrpc_cld = do_config_log_add(obd, seclogname,
319 CONFIG_T_SPTLRPC, NULL, NULL);
320 if (IS_ERR(sptlrpc_cld)) {
321 CERROR("can't create sptlrpc log: %s\n", seclogname);
322 rc = PTR_ERR(sptlrpc_cld);
326 params_cld = config_params_log_add(obd, cfg, sb);
327 if (IS_ERR(params_cld)) {
328 rc = PTR_ERR(params_cld);
329 CERROR("%s: can't create params log: rc = %d\n",
334 cld = do_config_log_add(obd, logname, CONFIG_T_CONFIG, cfg, sb);
336 CERROR("can't create log: %s\n", logname);
341 cld->cld_sptlrpc = sptlrpc_cld;
342 cld->cld_params = params_cld;
344 LASSERT(lsi->lsi_lmd);
345 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOIR)) {
346 struct config_llog_data *recover_cld;
348 ptr = strrchr(seclogname, '-');
352 CERROR("%s: sptlrpc log name not correct, %s: rc = %d\n",
353 obd->obd_name, seclogname, -EINVAL);
357 recover_cld = config_recover_log_add(obd, seclogname, cfg, sb);
358 if (IS_ERR(recover_cld)) {
359 rc = PTR_ERR(recover_cld);
362 cld->cld_recover = recover_cld;
371 config_log_put(params_cld);
374 config_log_put(sptlrpc_cld);
380 DEFINE_MUTEX(llog_process_lock);
382 /** Stop watching for updates on this log.
384 static int config_log_end(char *logname, struct config_llog_instance *cfg)
386 struct config_llog_data *cld;
387 struct config_llog_data *cld_sptlrpc = NULL;
388 struct config_llog_data *cld_params = NULL;
389 struct config_llog_data *cld_recover = NULL;
392 cld = config_log_find(logname, cfg);
396 mutex_lock(&cld->cld_lock);
398 * if cld_stopping is set, it means we didn't start the log thus
399 * not owning the start ref. this can happen after previous umount:
400 * the cld still hanging there waiting for lock cancel, and we
401 * remount again but failed in the middle and call log_end without
404 if (unlikely(cld->cld_stopping)) {
405 mutex_unlock(&cld->cld_lock);
406 /* drop the ref from the find */
411 cld->cld_stopping = 1;
413 cld_recover = cld->cld_recover;
414 cld->cld_recover = NULL;
415 mutex_unlock(&cld->cld_lock);
418 mutex_lock(&cld_recover->cld_lock);
419 cld_recover->cld_stopping = 1;
420 mutex_unlock(&cld_recover->cld_lock);
421 config_log_put(cld_recover);
424 spin_lock(&config_list_lock);
425 cld_sptlrpc = cld->cld_sptlrpc;
426 cld->cld_sptlrpc = NULL;
427 cld_params = cld->cld_params;
428 cld->cld_params = NULL;
429 spin_unlock(&config_list_lock);
432 config_log_put(cld_sptlrpc);
435 mutex_lock(&cld_params->cld_lock);
436 cld_params->cld_stopping = 1;
437 mutex_unlock(&cld_params->cld_lock);
438 config_log_put(cld_params);
441 /* drop the ref from the find */
443 /* drop the start ref */
446 CDEBUG(D_MGC, "end config log %s (%d)\n", logname ? logname : "client",
451 int lprocfs_mgc_rd_ir_state(struct seq_file *m, void *data)
453 struct obd_device *obd = data;
454 struct obd_import *imp;
455 struct obd_connect_data *ocd;
456 struct config_llog_data *cld;
459 rc = lprocfs_climp_check(obd);
463 imp = obd->u.cli.cl_import;
464 ocd = &imp->imp_connect_data;
466 seq_printf(m, "imperative_recovery: %s\n",
467 OCD_HAS_FLAG(ocd, IMP_RECOV) ? "ENABLED" : "DISABLED");
468 seq_printf(m, "client_state:\n");
470 spin_lock(&config_list_lock);
471 list_for_each_entry(cld, &config_llog_list, cld_list_chain) {
472 if (!cld->cld_recover)
474 seq_printf(m, " - { client: %s, nidtbl_version: %u }\n",
476 cld->cld_recover->cld_cfg.cfg_last_idx);
478 spin_unlock(&config_list_lock);
480 up_read(&obd->u.cli.cl_sem);
484 /* reenqueue any lost locks */
485 #define RQ_RUNNING 0x1
489 #define RQ_PRECLEANUP 0x10
491 static wait_queue_head_t rq_waitq;
492 static DECLARE_COMPLETION(rq_exit);
493 static DECLARE_COMPLETION(rq_start);
495 static void do_requeue(struct config_llog_data *cld)
497 LASSERT(atomic_read(&cld->cld_refcount) > 0);
499 /* Do not run mgc_process_log on a disconnected export or an
500 * export which is being disconnected. Take the client
501 * semaphore to make the check non-racy.
503 down_read(&cld->cld_mgcexp->exp_obd->u.cli.cl_sem);
504 if (cld->cld_mgcexp->exp_obd->u.cli.cl_conn_count != 0) {
505 CDEBUG(D_MGC, "updating log %s\n", cld->cld_logname);
506 mgc_process_log(cld->cld_mgcexp->exp_obd, cld);
508 CDEBUG(D_MGC, "disconnecting, won't update log %s\n",
511 up_read(&cld->cld_mgcexp->exp_obd->u.cli.cl_sem);
514 /* this timeout represents how many seconds MGC should wait before
515 * requeue config and recover lock to the MGS. We need to randomize this
516 * in order to not flood the MGS.
518 #define MGC_TIMEOUT_MIN_SECONDS 5
519 #define MGC_TIMEOUT_RAND_CENTISEC 0x1ff /* ~500 */
521 static int mgc_requeue_thread(void *data)
525 CDEBUG(D_MGC, "Starting requeue thread\n");
527 /* Keep trying failed locks periodically */
528 spin_lock(&config_list_lock);
529 rq_state |= RQ_RUNNING;
531 struct l_wait_info lwi;
532 struct config_llog_data *cld, *cld_prev;
533 int rand = cfs_rand() & MGC_TIMEOUT_RAND_CENTISEC;
534 int stopped = !!(rq_state & RQ_STOP);
537 /* Any new or requeued lostlocks will change the state */
538 rq_state &= ~(RQ_NOW | RQ_LATER);
539 spin_unlock(&config_list_lock);
546 /* Always wait a few seconds to allow the server who
547 * caused the lock revocation to finish its setup, plus some
548 * random so everyone doesn't try to reconnect at once.
550 to = MGC_TIMEOUT_MIN_SECONDS * HZ;
551 to += rand * HZ / 100; /* rand is centi-seconds */
552 lwi = LWI_TIMEOUT(to, NULL, NULL);
553 l_wait_event(rq_waitq, rq_state & (RQ_STOP | RQ_PRECLEANUP),
557 * iterate & processing through the list. for each cld, process
558 * its depending sptlrpc cld firstly (if any) and then itself.
560 * it's guaranteed any item in the list must have
561 * reference > 0; and if cld_lostlock is set, at
562 * least one reference is taken by the previous enqueue.
566 spin_lock(&config_list_lock);
567 rq_state &= ~RQ_PRECLEANUP;
568 list_for_each_entry(cld, &config_llog_list, cld_list_chain) {
569 if (!cld->cld_lostlock)
572 spin_unlock(&config_list_lock);
574 LASSERT(atomic_read(&cld->cld_refcount) > 0);
576 /* Whether we enqueued again or not in mgc_process_log,
577 * we're done with the ref from the old enqueue
580 config_log_put(cld_prev);
583 cld->cld_lostlock = 0;
584 if (likely(!stopped))
587 spin_lock(&config_list_lock);
589 spin_unlock(&config_list_lock);
591 config_log_put(cld_prev);
593 /* break after scanning the list so that we can drop
594 * refcount to losing lock clds
596 if (unlikely(stopped)) {
597 spin_lock(&config_list_lock);
601 /* Wait a bit to see if anyone else needs a requeue */
602 lwi = (struct l_wait_info) { 0 };
603 l_wait_event(rq_waitq, rq_state & (RQ_NOW | RQ_STOP),
605 spin_lock(&config_list_lock);
607 /* spinlock and while guarantee RQ_NOW and RQ_LATER are not set */
608 rq_state &= ~RQ_RUNNING;
609 spin_unlock(&config_list_lock);
613 CDEBUG(D_MGC, "Ending requeue thread\n");
617 /* Add a cld to the list to requeue. Start the requeue thread if needed.
618 * We are responsible for dropping the config log reference from here on out.
620 static void mgc_requeue_add(struct config_llog_data *cld)
622 CDEBUG(D_INFO, "log %s: requeue (r=%d sp=%d st=%x)\n",
623 cld->cld_logname, atomic_read(&cld->cld_refcount),
624 cld->cld_stopping, rq_state);
625 LASSERT(atomic_read(&cld->cld_refcount) > 0);
627 mutex_lock(&cld->cld_lock);
628 if (cld->cld_stopping || cld->cld_lostlock) {
629 mutex_unlock(&cld->cld_lock);
632 /* this refcount will be released in mgc_requeue_thread. */
634 cld->cld_lostlock = 1;
635 mutex_unlock(&cld->cld_lock);
637 /* Hold lock for rq_state */
638 spin_lock(&config_list_lock);
639 if (rq_state & RQ_STOP) {
640 spin_unlock(&config_list_lock);
641 cld->cld_lostlock = 0;
645 spin_unlock(&config_list_lock);
650 static int mgc_llog_init(const struct lu_env *env, struct obd_device *obd)
652 struct llog_ctxt *ctxt;
655 /* setup only remote ctxt, the local disk context is switched per each
656 * filesystem during mgc_fs_setup()
658 rc = llog_setup(env, obd, &obd->obd_olg, LLOG_CONFIG_REPL_CTXT, obd,
663 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
666 llog_initiator_connect(ctxt);
672 static int mgc_llog_fini(const struct lu_env *env, struct obd_device *obd)
674 struct llog_ctxt *ctxt;
676 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
678 llog_cleanup(env, ctxt);
683 static atomic_t mgc_count = ATOMIC_INIT(0);
684 static int mgc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
690 case OBD_CLEANUP_EARLY:
692 case OBD_CLEANUP_EXPORTS:
693 if (atomic_dec_and_test(&mgc_count)) {
694 LASSERT(rq_state & RQ_RUNNING);
695 /* stop requeue thread */
698 /* wakeup requeue thread to clean our cld */
699 temp = RQ_NOW | RQ_PRECLEANUP;
701 spin_lock(&config_list_lock);
703 spin_unlock(&config_list_lock);
706 wait_for_completion(&rq_exit);
707 obd_cleanup_client_import(obd);
708 rc = mgc_llog_fini(NULL, obd);
710 CERROR("failed to cleanup llogging subsystems\n");
716 static int mgc_cleanup(struct obd_device *obd)
718 /* COMPAT_146 - old config logs may have added profiles we don't
721 if (obd->obd_type->typ_refcnt <= 1)
722 /* Only for the last mgc */
723 class_del_profiles();
725 lprocfs_obd_cleanup(obd);
728 return client_obd_cleanup(obd);
731 static int mgc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
733 struct lprocfs_static_vars lvars = { NULL };
734 struct task_struct *task;
739 rc = client_obd_setup(obd, lcfg);
743 rc = mgc_llog_init(NULL, obd);
745 CERROR("failed to setup llogging subsystems\n");
749 lprocfs_mgc_init_vars(&lvars);
750 lprocfs_obd_setup(obd, lvars.obd_vars, lvars.sysfs_vars);
751 sptlrpc_lprocfs_cliobd_attach(obd);
753 if (atomic_inc_return(&mgc_count) == 1) {
755 init_waitqueue_head(&rq_waitq);
757 /* start requeue thread */
758 task = kthread_run(mgc_requeue_thread, NULL, "ll_cfg_requeue");
761 CERROR("%s: cannot start requeue thread: rc = %d; no more log updates\n",
765 /* rc is the task_struct pointer of mgc_requeue_thread. */
767 wait_for_completion(&rq_start);
773 client_obd_cleanup(obd);
779 /* based on ll_mdc_blocking_ast */
780 static int mgc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
781 void *data, int flag)
783 struct lustre_handle lockh;
784 struct config_llog_data *cld = data;
788 case LDLM_CB_BLOCKING:
789 /* mgs wants the lock, give it up... */
790 LDLM_DEBUG(lock, "MGC blocking CB");
791 ldlm_lock2handle(lock, &lockh);
792 rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
794 case LDLM_CB_CANCELING:
795 /* We've given up the lock, prepare ourselves to update. */
796 LDLM_DEBUG(lock, "MGC cancel CB");
798 CDEBUG(D_MGC, "Lock res "DLDLMRES" (%.8s)\n",
799 PLDLMRES(lock->l_resource),
800 (char *)&lock->l_resource->lr_name.name[0]);
803 CDEBUG(D_INFO, "missing data, won't requeue\n");
807 /* held at mgc_process_log(). */
808 LASSERT(atomic_read(&cld->cld_refcount) > 0);
809 /* Are we done with this log? */
810 if (cld->cld_stopping) {
811 CDEBUG(D_MGC, "log %s: stopping, won't requeue\n",
816 /* Make sure not to re-enqueue when the mgc is stopping
817 * (we get called from client_disconnect_export)
819 if (!lock->l_conn_export ||
820 !lock->l_conn_export->exp_obd->u.cli.cl_conn_count) {
821 CDEBUG(D_MGC, "log %.8s: disconnecting, won't requeue\n",
828 mgc_requeue_add(cld);
838 /* Not sure where this should go... */
839 /* This is the timeout value for MGS_CONNECT request plus a ping interval, such
840 * that we can have a chance to try the secondary MGS if any.
842 #define MGC_ENQUEUE_LIMIT (INITIAL_CONNECT_TIMEOUT + (AT_OFF ? 0 : at_min) \
844 #define MGC_TARGET_REG_LIMIT 10
845 #define MGC_SEND_PARAM_LIMIT 10
847 /* Send parameter to MGS*/
848 static int mgc_set_mgs_param(struct obd_export *exp,
849 struct mgs_send_param *msp)
851 struct ptlrpc_request *req;
852 struct mgs_send_param *req_msp, *rep_msp;
855 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
856 &RQF_MGS_SET_INFO, LUSTRE_MGS_VERSION,
861 req_msp = req_capsule_client_get(&req->rq_pill, &RMF_MGS_SEND_PARAM);
863 ptlrpc_req_finished(req);
867 memcpy(req_msp, msp, sizeof(*req_msp));
868 ptlrpc_request_set_replen(req);
870 /* Limit how long we will wait for the enqueue to complete */
871 req->rq_delay_limit = MGC_SEND_PARAM_LIMIT;
872 rc = ptlrpc_queue_wait(req);
874 rep_msp = req_capsule_server_get(&req->rq_pill, &RMF_MGS_SEND_PARAM);
875 memcpy(msp, rep_msp, sizeof(*rep_msp));
878 ptlrpc_req_finished(req);
883 /* Take a config lock so we can get cancel notifications */
884 static int mgc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
885 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
886 __u64 *flags, void *bl_cb, void *cp_cb, void *gl_cb,
887 void *data, __u32 lvb_len, void *lvb_swabber,
888 struct lustre_handle *lockh)
890 struct config_llog_data *cld = data;
891 struct ldlm_enqueue_info einfo = {
894 .ei_cb_bl = mgc_blocking_ast,
895 .ei_cb_cp = ldlm_completion_ast,
897 struct ptlrpc_request *req;
898 int short_limit = cld_is_sptlrpc(cld);
901 CDEBUG(D_MGC, "Enqueue for %s (res %#llx)\n", cld->cld_logname,
902 cld->cld_resid.name[0]);
904 /* We need a callback for every lockholder, so don't try to
905 * ldlm_lock_match (see rev 1.1.2.11.2.47)
907 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
908 &RQF_LDLM_ENQUEUE, LUSTRE_DLM_VERSION,
913 req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, 0);
914 ptlrpc_request_set_replen(req);
916 /* Limit how long we will wait for the enqueue to complete */
917 req->rq_delay_limit = short_limit ? 5 : MGC_ENQUEUE_LIMIT;
918 rc = ldlm_cli_enqueue(exp, &req, &einfo, &cld->cld_resid, NULL, flags,
919 NULL, 0, LVB_T_NONE, lockh, 0);
920 /* A failed enqueue should still call the mgc_blocking_ast,
921 * where it will be requeued if needed ("grant failed").
923 ptlrpc_req_finished(req);
927 static void mgc_notify_active(struct obd_device *unused)
929 /* wakeup mgc_requeue_thread to requeue mgc lock */
930 spin_lock(&config_list_lock);
932 spin_unlock(&config_list_lock);
935 /* TODO: Help the MGS rebuild nidtbl. -jay */
938 /* Send target_reg message to MGS */
939 static int mgc_target_register(struct obd_export *exp,
940 struct mgs_target_info *mti)
942 struct ptlrpc_request *req;
943 struct mgs_target_info *req_mti, *rep_mti;
946 req = ptlrpc_request_alloc_pack(class_exp2cliimp(exp),
947 &RQF_MGS_TARGET_REG, LUSTRE_MGS_VERSION,
952 req_mti = req_capsule_client_get(&req->rq_pill, &RMF_MGS_TARGET_INFO);
954 ptlrpc_req_finished(req);
958 memcpy(req_mti, mti, sizeof(*req_mti));
959 ptlrpc_request_set_replen(req);
960 CDEBUG(D_MGC, "register %s\n", mti->mti_svname);
961 /* Limit how long we will wait for the enqueue to complete */
962 req->rq_delay_limit = MGC_TARGET_REG_LIMIT;
964 rc = ptlrpc_queue_wait(req);
966 rep_mti = req_capsule_server_get(&req->rq_pill,
967 &RMF_MGS_TARGET_INFO);
968 memcpy(mti, rep_mti, sizeof(*rep_mti));
969 CDEBUG(D_MGC, "register %s got index = %d\n",
970 mti->mti_svname, mti->mti_stripe_index);
972 ptlrpc_req_finished(req);
977 static int mgc_set_info_async(const struct lu_env *env, struct obd_export *exp,
978 u32 keylen, void *key, u32 vallen,
979 void *val, struct ptlrpc_request_set *set)
983 /* Turn off initial_recov after we try all backup servers once */
984 if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
985 struct obd_import *imp = class_exp2cliimp(exp);
988 if (vallen != sizeof(int))
991 CDEBUG(D_MGC, "InitRecov %s %d/d%d:i%d:r%d:or%d:%s\n",
992 imp->imp_obd->obd_name, value,
993 imp->imp_deactive, imp->imp_invalid,
994 imp->imp_replayable, imp->imp_obd->obd_replayable,
995 ptlrpc_import_state_name(imp->imp_state));
996 /* Resurrect if we previously died */
997 if ((imp->imp_state != LUSTRE_IMP_FULL &&
998 imp->imp_state != LUSTRE_IMP_NEW) || value > 1)
999 ptlrpc_reconnect_import(imp);
1002 if (KEY_IS(KEY_SET_INFO)) {
1003 struct mgs_send_param *msp;
1006 rc = mgc_set_mgs_param(exp, msp);
1009 if (KEY_IS(KEY_MGSSEC)) {
1010 struct client_obd *cli = &exp->exp_obd->u.cli;
1011 struct sptlrpc_flavor flvr;
1014 * empty string means using current flavor, if which haven't
1015 * been set yet, set it as null.
1017 * if flavor has been set previously, check the asking flavor
1018 * must match the existing one.
1021 if (cli->cl_flvr_mgc.sf_rpc != SPTLRPC_FLVR_INVALID)
1027 rc = sptlrpc_parse_flavor(val, &flvr);
1029 CERROR("invalid sptlrpc flavor %s to MGS\n",
1035 * caller already hold a mutex
1037 if (cli->cl_flvr_mgc.sf_rpc == SPTLRPC_FLVR_INVALID) {
1038 cli->cl_flvr_mgc = flvr;
1039 } else if (memcmp(&cli->cl_flvr_mgc, &flvr,
1040 sizeof(flvr)) != 0) {
1043 sptlrpc_flavor2name(&cli->cl_flvr_mgc,
1045 LCONSOLE_ERROR("asking sptlrpc flavor %s to MGS but currently %s is in use\n",
1055 static int mgc_get_info(const struct lu_env *env, struct obd_export *exp,
1056 __u32 keylen, void *key, __u32 *vallen, void *val,
1057 struct lov_stripe_md *unused)
1061 if (KEY_IS(KEY_CONN_DATA)) {
1062 struct obd_import *imp = class_exp2cliimp(exp);
1063 struct obd_connect_data *data = val;
1065 if (*vallen == sizeof(*data)) {
1066 *data = imp->imp_connect_data;
1074 static int mgc_import_event(struct obd_device *obd,
1075 struct obd_import *imp,
1076 enum obd_import_event event)
1078 LASSERT(imp->imp_obd == obd);
1079 CDEBUG(D_MGC, "import event %#x\n", event);
1082 case IMP_EVENT_DISCON:
1083 /* MGC imports should not wait for recovery */
1084 if (OCD_HAS_FLAG(&imp->imp_connect_data, IMP_RECOV))
1085 ptlrpc_pinger_ir_down();
1087 case IMP_EVENT_INACTIVE:
1089 case IMP_EVENT_INVALIDATE: {
1090 struct ldlm_namespace *ns = obd->obd_namespace;
1092 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
1095 case IMP_EVENT_ACTIVE:
1096 CDEBUG(D_INFO, "%s: Reactivating import\n", obd->obd_name);
1097 /* Clearing obd_no_recov allows us to continue pinging */
1098 obd->obd_no_recov = 0;
1099 mgc_notify_active(obd);
1100 if (OCD_HAS_FLAG(&imp->imp_connect_data, IMP_RECOV))
1101 ptlrpc_pinger_ir_up();
1105 case IMP_EVENT_DEACTIVATE:
1106 case IMP_EVENT_ACTIVATE:
1109 CERROR("Unknown import event %#x\n", event);
1116 CONFIG_READ_NRPAGES_INIT = 1 << (20 - PAGE_CACHE_SHIFT),
1117 CONFIG_READ_NRPAGES = 4
1120 static int mgc_apply_recover_logs(struct obd_device *mgc,
1121 struct config_llog_data *cld,
1123 void *data, int datalen, bool mne_swab)
1125 struct config_llog_instance *cfg = &cld->cld_cfg;
1126 struct mgs_nidtbl_entry *entry;
1127 struct lustre_cfg *lcfg;
1128 struct lustre_cfg_bufs bufs;
1129 u64 prev_version = 0;
1137 LASSERT(cfg->cfg_instance);
1138 LASSERT(cfg->cfg_sb == cfg->cfg_instance);
1140 inst = kzalloc(PAGE_CACHE_SIZE, GFP_KERNEL);
1144 pos = snprintf(inst, PAGE_CACHE_SIZE, "%p", cfg->cfg_instance);
1145 if (pos >= PAGE_CACHE_SIZE) {
1152 bufsz = PAGE_CACHE_SIZE - pos;
1154 while (datalen > 0) {
1155 int entry_len = sizeof(*entry);
1157 struct obd_device *obd;
1164 if (datalen < sizeof(*entry))
1167 entry = (typeof(entry))(data + off);
1170 if (entry->mne_nid_type != 0) /* only support type 0 for ipv4 */
1172 if (entry->mne_nid_count == 0) /* at least one nid entry */
1174 if (entry->mne_nid_size != sizeof(lnet_nid_t))
1177 entry_len += entry->mne_nid_count * entry->mne_nid_size;
1178 if (datalen < entry_len) /* must have entry_len at least */
1181 /* Keep this swab for normal mixed endian handling. LU-1644 */
1183 lustre_swab_mgs_nidtbl_entry(entry);
1184 if (entry->mne_length > PAGE_CACHE_SIZE) {
1185 CERROR("MNE too large (%u)\n", entry->mne_length);
1189 if (entry->mne_length < entry_len)
1192 off += entry->mne_length;
1193 datalen -= entry->mne_length;
1197 if (entry->mne_version > max_version) {
1198 CERROR("entry index(%lld) is over max_index(%lld)\n",
1199 entry->mne_version, max_version);
1203 if (prev_version >= entry->mne_version) {
1204 CERROR("index unsorted, prev %lld, now %lld\n",
1205 prev_version, entry->mne_version);
1208 prev_version = entry->mne_version;
1211 * Write a string with format "nid::instance" to
1212 * lustre/<osc|mdc>/<target>-<osc|mdc>-<instance>/import.
1215 is_ost = entry->mne_type == LDD_F_SV_TYPE_OST;
1216 memset(buf, 0, bufsz);
1220 /* lustre-OST0001-osc-<instance #> */
1221 strcpy(obdname, cld->cld_logname);
1222 cname = strrchr(obdname, '-');
1224 CERROR("mgc %s: invalid logname %s\n",
1225 mgc->obd_name, obdname);
1229 pos = cname - obdname;
1231 pos += sprintf(obdname + pos, "-%s%04x",
1232 is_ost ? "OST" : "MDT", entry->mne_index);
1234 cname = is_ost ? "osc" : "mdc";
1235 pos += sprintf(obdname + pos, "-%s-%s", cname, inst);
1236 lustre_cfg_bufs_reset(&bufs, obdname);
1238 /* find the obd by obdname */
1239 obd = class_name2obd(obdname);
1241 CDEBUG(D_INFO, "mgc %s: cannot find obdname %s\n",
1242 mgc->obd_name, obdname);
1244 /* this is a safe race, when the ost is starting up...*/
1248 /* osc.import = "connection=<Conn UUID>::<target instance>" */
1251 pos += sprintf(params, "%s.import=%s", cname, "connection=");
1254 down_read(&obd->u.cli.cl_sem);
1255 if (!obd->u.cli.cl_import) {
1256 /* client does not connect to the OST yet */
1257 up_read(&obd->u.cli.cl_sem);
1262 /* TODO: iterate all nids to find one */
1263 /* find uuid by nid */
1264 rc = client_import_find_conn(obd->u.cli.cl_import,
1266 (struct obd_uuid *)uuid);
1267 up_read(&obd->u.cli.cl_sem);
1269 CERROR("mgc: cannot find uuid by nid %s\n",
1270 libcfs_nid2str(entry->u.nids[0]));
1274 CDEBUG(D_INFO, "Find uuid %s by nid %s\n",
1275 uuid, libcfs_nid2str(entry->u.nids[0]));
1277 pos += strlen(uuid);
1278 pos += sprintf(buf + pos, "::%u", entry->mne_instance);
1279 LASSERT(pos < bufsz);
1281 lustre_cfg_bufs_set_string(&bufs, 1, params);
1284 lcfg = lustre_cfg_new(LCFG_PARAM, &bufs);
1286 CERROR("mgc: cannot allocate memory\n");
1290 CDEBUG(D_INFO, "ir apply logs %lld/%lld for %s -> %s\n",
1291 prev_version, max_version, obdname, params);
1293 rc = class_process_config(lcfg);
1294 lustre_cfg_free(lcfg);
1296 CDEBUG(D_INFO, "process config for %s error %d\n",
1299 /* continue, even one with error */
1307 * This function is called if this client was notified for target restarting
1308 * by the MGS. A CONFIG_READ RPC is going to send to fetch recovery logs.
1310 static int mgc_process_recover_log(struct obd_device *obd,
1311 struct config_llog_data *cld)
1313 struct ptlrpc_request *req = NULL;
1314 struct config_llog_instance *cfg = &cld->cld_cfg;
1315 struct mgs_config_body *body;
1316 struct mgs_config_res *res;
1317 struct ptlrpc_bulk_desc *desc;
1318 struct page **pages;
1326 /* allocate buffer for bulk transfer.
1327 * if this is the first time for this mgs to read logs,
1328 * CONFIG_READ_NRPAGES_INIT will be used since it will read all logs
1329 * once; otherwise, it only reads increment of logs, this should be
1330 * small and CONFIG_READ_NRPAGES will be used.
1332 nrpages = CONFIG_READ_NRPAGES;
1333 if (cfg->cfg_last_idx == 0) /* the first time */
1334 nrpages = CONFIG_READ_NRPAGES_INIT;
1336 pages = kcalloc(nrpages, sizeof(*pages), GFP_KERNEL);
1342 for (i = 0; i < nrpages; i++) {
1343 pages[i] = alloc_page(GFP_KERNEL);
1351 LASSERT(cld_is_recover(cld));
1352 LASSERT(mutex_is_locked(&cld->cld_lock));
1353 req = ptlrpc_request_alloc(class_exp2cliimp(cld->cld_mgcexp),
1354 &RQF_MGS_CONFIG_READ);
1360 rc = ptlrpc_request_pack(req, LUSTRE_MGS_VERSION, MGS_CONFIG_READ);
1365 body = req_capsule_client_get(&req->rq_pill, &RMF_MGS_CONFIG_BODY);
1366 LASSERT(sizeof(body->mcb_name) > strlen(cld->cld_logname));
1367 if (strlcpy(body->mcb_name, cld->cld_logname, sizeof(body->mcb_name))
1368 >= sizeof(body->mcb_name)) {
1372 body->mcb_offset = cfg->cfg_last_idx + 1;
1373 body->mcb_type = cld->cld_type;
1374 body->mcb_bits = PAGE_CACHE_SHIFT;
1375 body->mcb_units = nrpages;
1377 /* allocate bulk transfer descriptor */
1378 desc = ptlrpc_prep_bulk_imp(req, nrpages, 1, BULK_PUT_SINK,
1385 for (i = 0; i < nrpages; i++)
1386 ptlrpc_prep_bulk_page_pin(desc, pages[i], 0, PAGE_CACHE_SIZE);
1388 ptlrpc_request_set_replen(req);
1389 rc = ptlrpc_queue_wait(req);
1393 res = req_capsule_server_get(&req->rq_pill, &RMF_MGS_CONFIG_RES);
1394 if (res->mcr_size < res->mcr_offset) {
1399 /* always update the index even though it might have errors with
1400 * handling the recover logs
1402 cfg->cfg_last_idx = res->mcr_offset;
1403 eof = res->mcr_offset == res->mcr_size;
1405 CDEBUG(D_INFO, "Latest version %lld, more %d.\n",
1406 res->mcr_offset, eof == false);
1408 ealen = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk, 0);
1414 if (ealen > nrpages << PAGE_CACHE_SHIFT) {
1419 if (ealen == 0) { /* no logs transferred */
1425 mne_swab = !!ptlrpc_rep_need_swab(req);
1426 #if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(3, 2, 50, 0)
1427 /* This import flag means the server did an extra swab of IR MNE
1428 * records (fixed in LU-1252), reverse it here if needed. LU-1644
1430 if (unlikely(req->rq_import->imp_need_mne_swab))
1431 mne_swab = !mne_swab;
1433 #warning "LU-1644: Remove old OBD_CONNECT_MNE_SWAB fixup and imp_need_mne_swab"
1436 for (i = 0; i < nrpages && ealen > 0; i++) {
1440 ptr = kmap(pages[i]);
1441 rc2 = mgc_apply_recover_logs(obd, cld, res->mcr_offset, ptr,
1442 min_t(int, ealen, PAGE_CACHE_SIZE),
1446 CWARN("Process recover log %s error %d\n",
1447 cld->cld_logname, rc2);
1451 ealen -= PAGE_CACHE_SIZE;
1456 ptlrpc_req_finished(req);
1458 if (rc == 0 && !eof)
1462 for (i = 0; i < nrpages; i++) {
1465 __free_page(pages[i]);
1472 /* local_only means it cannot get remote llogs */
1473 static int mgc_process_cfg_log(struct obd_device *mgc,
1474 struct config_llog_data *cld, int local_only)
1476 struct llog_ctxt *ctxt;
1477 struct lustre_sb_info *lsi = NULL;
1479 bool sptlrpc_started = false;
1483 LASSERT(mutex_is_locked(&cld->cld_lock));
1486 * local copy of sptlrpc log is controlled elsewhere, don't try to
1489 if (cld_is_sptlrpc(cld) && local_only)
1492 if (cld->cld_cfg.cfg_sb)
1493 lsi = s2lsi(cld->cld_cfg.cfg_sb);
1495 env = kzalloc(sizeof(*env), GFP_KERNEL);
1499 rc = lu_env_init(env, LCT_MG_THREAD);
1503 ctxt = llog_get_context(mgc, LLOG_CONFIG_REPL_CTXT);
1506 if (local_only) /* no local log at client side */ {
1511 if (cld_is_sptlrpc(cld)) {
1512 sptlrpc_conf_log_update_begin(cld->cld_logname);
1513 sptlrpc_started = true;
1516 /* logname and instance info should be the same, so use our
1517 * copy of the instance for the update. The cfg_last_idx will
1520 rc = class_config_parse_llog(env, ctxt, cld->cld_logname,
1524 __llog_ctxt_put(env, ctxt);
1527 * update settings on existing OBDs. doing it inside
1528 * of llog_process_lock so no device is attaching/detaching
1530 * the logname must be <fsname>-sptlrpc
1532 if (sptlrpc_started) {
1533 LASSERT(cld_is_sptlrpc(cld));
1534 sptlrpc_conf_log_update_end(cld->cld_logname);
1535 class_notify_sptlrpc_conf(cld->cld_logname,
1536 strlen(cld->cld_logname) -
1537 strlen("-sptlrpc"));
1546 /** Get a config log from the MGS and process it.
1547 * This func is called for both clients and servers.
1548 * Copy the log locally before parsing it if appropriate (non-MGS server)
1550 int mgc_process_log(struct obd_device *mgc, struct config_llog_data *cld)
1552 struct lustre_handle lockh = { 0 };
1553 __u64 flags = LDLM_FL_NO_LRU;
1558 /* I don't want multiple processes running process_log at once --
1559 * sounds like badness. It actually might be fine, as long as
1560 * we're not trying to update from the same log
1561 * simultaneously (in which case we should use a per-log sem.)
1563 mutex_lock(&cld->cld_lock);
1564 if (cld->cld_stopping) {
1565 mutex_unlock(&cld->cld_lock);
1569 OBD_FAIL_TIMEOUT(OBD_FAIL_MGC_PAUSE_PROCESS_LOG, 20);
1571 CDEBUG(D_MGC, "Process log %s:%p from %d\n", cld->cld_logname,
1572 cld->cld_cfg.cfg_instance, cld->cld_cfg.cfg_last_idx + 1);
1574 /* Get the cfg lock on the llog */
1575 rcl = mgc_enqueue(mgc->u.cli.cl_mgc_mgsexp, NULL, LDLM_PLAIN, NULL,
1576 LCK_CR, &flags, NULL, NULL, NULL,
1577 cld, 0, NULL, &lockh);
1579 /* Get the cld, it will be released in mgc_blocking_ast. */
1580 config_log_get(cld);
1581 rc = ldlm_lock_set_data(&lockh, (void *)cld);
1584 CDEBUG(D_MGC, "Can't get cfg lock: %d\n", rcl);
1586 /* mark cld_lostlock so that it will requeue
1587 * after MGC becomes available.
1589 cld->cld_lostlock = 1;
1590 /* Get extra reference, it will be put in requeue thread */
1591 config_log_get(cld);
1594 if (cld_is_recover(cld)) {
1595 rc = 0; /* this is not a fatal error for recover log */
1597 rc = mgc_process_recover_log(mgc, cld);
1599 rc = mgc_process_cfg_log(mgc, cld, rcl != 0);
1602 CDEBUG(D_MGC, "%s: configuration from log '%s' %sed (%d).\n",
1603 mgc->obd_name, cld->cld_logname, rc ? "fail" : "succeed", rc);
1605 mutex_unlock(&cld->cld_lock);
1607 /* Now drop the lock so MGS can revoke it */
1609 ldlm_lock_decref(&lockh, LCK_CR);
1614 /** Called from lustre_process_log.
1615 * LCFG_LOG_START gets the config log from the MGS, processes it to start
1616 * any services, and adds it to the list logs to watch (follow).
1618 static int mgc_process_config(struct obd_device *obd, u32 len, void *buf)
1620 struct lustre_cfg *lcfg = buf;
1621 struct config_llog_instance *cfg = NULL;
1625 switch (lcfg->lcfg_command) {
1626 case LCFG_LOV_ADD_OBD: {
1627 /* Overloading this cfg command: register a new target */
1628 struct mgs_target_info *mti;
1630 if (LUSTRE_CFG_BUFLEN(lcfg, 1) !=
1631 sizeof(struct mgs_target_info)) {
1636 mti = (struct mgs_target_info *)lustre_cfg_buf(lcfg, 1);
1637 CDEBUG(D_MGC, "add_target %s %#x\n",
1638 mti->mti_svname, mti->mti_flags);
1639 rc = mgc_target_register(obd->u.cli.cl_mgc_mgsexp, mti);
1642 case LCFG_LOV_DEL_OBD:
1643 /* Unregister has no meaning at the moment. */
1644 CERROR("lov_del_obd unimplemented\n");
1647 case LCFG_SPTLRPC_CONF: {
1648 rc = sptlrpc_process_config(lcfg);
1651 case LCFG_LOG_START: {
1652 struct config_llog_data *cld;
1653 struct super_block *sb;
1655 logname = lustre_cfg_string(lcfg, 1);
1656 cfg = (struct config_llog_instance *)lustre_cfg_buf(lcfg, 2);
1657 sb = *(struct super_block **)lustre_cfg_buf(lcfg, 3);
1659 CDEBUG(D_MGC, "parse_log %s from %d\n", logname,
1662 /* We're only called through here on the initial mount */
1663 rc = config_log_add(obd, logname, cfg, sb);
1666 cld = config_log_find(logname, cfg);
1673 /* FIXME only set this for old logs! Right now this forces
1674 * us to always skip the "inside markers" check
1676 cld->cld_cfg.cfg_flags |= CFG_F_COMPAT146;
1678 rc = mgc_process_log(obd, cld);
1679 if (rc == 0 && cld->cld_recover) {
1680 if (OCD_HAS_FLAG(&obd->u.cli.cl_import->
1681 imp_connect_data, IMP_RECOV)) {
1682 rc = mgc_process_log(obd, cld->cld_recover);
1684 struct config_llog_data *cir = cld->cld_recover;
1686 cld->cld_recover = NULL;
1687 config_log_put(cir);
1690 CERROR("Cannot process recover llog %d\n", rc);
1693 if (rc == 0 && cld->cld_params) {
1694 rc = mgc_process_log(obd, cld->cld_params);
1695 if (rc == -ENOENT) {
1697 "There is no params config file yet\n");
1700 /* params log is optional */
1703 "%s: can't process params llog: rc = %d\n",
1706 config_log_put(cld);
1710 case LCFG_LOG_END: {
1711 logname = lustre_cfg_string(lcfg, 1);
1713 if (lcfg->lcfg_bufcount >= 2)
1714 cfg = (struct config_llog_instance *)lustre_cfg_buf(
1716 rc = config_log_end(logname, cfg);
1720 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1730 static struct obd_ops mgc_obd_ops = {
1731 .owner = THIS_MODULE,
1733 .precleanup = mgc_precleanup,
1734 .cleanup = mgc_cleanup,
1735 .add_conn = client_import_add_conn,
1736 .del_conn = client_import_del_conn,
1737 .connect = client_connect_import,
1738 .disconnect = client_disconnect_export,
1739 /* .enqueue = mgc_enqueue, */
1740 /* .iocontrol = mgc_iocontrol, */
1741 .set_info_async = mgc_set_info_async,
1742 .get_info = mgc_get_info,
1743 .import_event = mgc_import_event,
1744 .process_config = mgc_process_config,
1747 static int __init mgc_init(void)
1749 return class_register_type(&mgc_obd_ops, NULL,
1750 LUSTRE_MGC_NAME, NULL);
1753 static void /*__exit*/ mgc_exit(void)
1755 class_unregister_type(LUSTRE_MGC_NAME);
1758 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1759 MODULE_DESCRIPTION("Lustre Management Client");
1760 MODULE_VERSION(LUSTRE_VERSION_STRING);
1761 MODULE_LICENSE("GPL");
1763 module_init(mgc_init);
1764 module_exit(mgc_exit);