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 2008 Sun Microsystems, Inc. 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/mgc/mgc_request.c
38 * Author: Nathan Rutman <nathan@clusterfs.com>
42 # define EXPORT_SYMTAB
44 #define DEBUG_SUBSYSTEM S_MGC
45 #define D_MGC D_CONFIG /*|D_WARNING*/
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_log.h>
60 #include <lustre_fsfilt.h>
61 #include <lustre_disk.h>
62 #include "mgc_internal.h"
64 static int mgc_name2resid(char *name, int len, struct ldlm_res_id *res_id)
69 CERROR("name too long: %s\n", name);
73 CERROR("missing name: %s\n", name);
76 memcpy(&resname, name, len);
78 memset(res_id, 0, sizeof(*res_id));
80 /* Always use the same endianness for the resid */
81 res_id->name[0] = cpu_to_le64(resname);
82 CDEBUG(D_MGC, "log %s to resid "LPX64"/"LPX64" (%.8s)\n", name,
83 res_id->name[0], res_id->name[1], (char *)&res_id->name[0]);
87 int mgc_fsname2resid(char *fsname, struct ldlm_res_id *res_id)
89 /* fsname is at most 8 chars long, maybe contain "-".
90 * e.g. "lustre", "SUN-000" */
91 return mgc_name2resid(fsname, strlen(fsname), res_id);
93 EXPORT_SYMBOL(mgc_fsname2resid);
95 int mgc_logname2resid(char *logname, struct ldlm_res_id *res_id)
100 /* logname consists of "fsname-nodetype".
101 * e.g. "lustre-MDT0001", "SUN-000-client" */
102 name_end = strrchr(logname, '-');
104 len = name_end - logname;
105 return mgc_name2resid(logname, len, res_id);
109 /********************** config llog list **********************/
110 static struct list_head config_llog_list = LIST_HEAD_INIT(config_llog_list);
111 static spinlock_t config_list_lock = SPIN_LOCK_UNLOCKED;
113 /* Take a reference to a config log */
114 static int config_log_get(struct config_llog_data *cld)
117 if (cld->cld_stopping)
119 atomic_inc(&cld->cld_refcount);
120 CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname,
121 atomic_read(&cld->cld_refcount));
125 /* Drop a reference to a config log. When no longer referenced,
126 we can free the config log data */
127 static void config_log_put(struct config_llog_data *cld)
130 CDEBUG(D_INFO, "log %s refs %d\n", cld->cld_logname,
131 atomic_read(&cld->cld_refcount));
132 if (atomic_dec_and_test(&cld->cld_refcount)) {
133 CDEBUG(D_MGC, "dropping config log %s\n", cld->cld_logname);
134 class_export_put(cld->cld_mgcexp);
135 spin_lock(&config_list_lock);
136 list_del(&cld->cld_list_chain);
137 spin_unlock(&config_list_lock);
138 OBD_FREE(cld->cld_logname, strlen(cld->cld_logname) + 1);
139 if (cld->cld_cfg.cfg_instance != NULL)
140 OBD_FREE(cld->cld_cfg.cfg_instance,
141 strlen(cld->cld_cfg.cfg_instance) + 1);
142 OBD_FREE(cld, sizeof(*cld));
147 /* Find a config log by name */
148 static struct config_llog_data *config_log_find(char *logname,
149 struct config_llog_instance *cfg)
151 struct list_head *tmp;
152 struct config_llog_data *cld;
153 char *logid = logname;
154 int match_instance = 0;
157 if (cfg && cfg->cfg_instance) {
159 logid = cfg->cfg_instance;
162 CERROR("No log specified\n");
163 RETURN(ERR_PTR(-EINVAL));
166 spin_lock(&config_list_lock);
167 list_for_each(tmp, &config_llog_list) {
168 cld = list_entry(tmp, struct config_llog_data, cld_list_chain);
169 if (match_instance && cld->cld_cfg.cfg_instance &&
170 strcmp(logid, cld->cld_cfg.cfg_instance) == 0)
172 if (!match_instance &&
173 strcmp(logid, cld->cld_logname) == 0)
176 spin_unlock(&config_list_lock);
178 CDEBUG(D_CONFIG, "can't get log %s\n", logid);
179 RETURN(ERR_PTR(-ENOENT));
181 atomic_inc(&cld->cld_refcount);
182 spin_unlock(&config_list_lock);
186 /* Add this log to our list of active logs.
187 We have one active log per "mount" - client instance or servername.
188 Each instance may be at a different point in the log. */
189 static int config_log_add(char *logname, struct config_llog_instance *cfg,
190 struct super_block *sb)
192 struct config_llog_data *cld;
193 struct lustre_sb_info *lsi = s2lsi(sb);
197 CDEBUG(D_MGC, "adding config log %s:%s\n", logname, cfg->cfg_instance);
199 OBD_ALLOC(cld, sizeof(*cld));
202 OBD_ALLOC(cld->cld_logname, strlen(logname) + 1);
203 if (!cld->cld_logname) {
204 OBD_FREE(cld, sizeof(*cld));
207 strcpy(cld->cld_logname, logname);
209 cld->cld_cfg.cfg_last_idx = 0;
210 cld->cld_cfg.cfg_flags = 0;
211 cld->cld_cfg.cfg_sb = sb;
212 atomic_set(&cld->cld_refcount, 1);
213 init_mutex(&cld->cld_sem);
215 /* Keep the mgc around until we are done */
216 cld->cld_mgcexp = class_export_get(lsi->lsi_mgc->obd_self_export);
218 if (cfg->cfg_instance != NULL) {
219 OBD_ALLOC(cld->cld_cfg.cfg_instance,
220 strlen(cfg->cfg_instance) + 1);
221 strcpy(cld->cld_cfg.cfg_instance, cfg->cfg_instance);
223 rc = mgc_logname2resid(logname, &cld->cld_resid);
224 spin_lock(&config_list_lock);
225 list_add(&cld->cld_list_chain, &config_llog_list);
226 spin_unlock(&config_list_lock);
236 /* Stop watching for updates on this log. */
237 static int config_log_end(char *logname, struct config_llog_instance *cfg)
239 struct config_llog_data *cld;
243 cld = config_log_find(logname, cfg);
245 RETURN(PTR_ERR(cld));
246 /* drop the ref from the find */
250 cld->cld_stopping = 1;
253 /* drop the start ref */
255 CDEBUG(D_MGC, "end config log %s (%d)\n", logname ? logname : "client",
260 /* reenqueue any lost locks */
261 #define RQ_RUNNING 0x1
265 static int rq_state = 0;
266 static cfs_waitq_t rq_waitq;
268 static int mgc_process_log(struct obd_device *mgc,
269 struct config_llog_data *cld);
271 static int mgc_requeue_thread(void *data)
273 struct l_wait_info lwi_now, lwi_later;
274 struct config_llog_data *cld, *n;
275 char name[] = "ll_cfg_requeue";
281 CDEBUG(D_MGC, "Starting requeue thread\n");
283 lwi_later = LWI_TIMEOUT(60 * HZ, NULL, NULL);
284 l_wait_event(rq_waitq, rq_state & (RQ_NOW | RQ_STOP), &lwi_later);
286 /* Keep trying failed locks periodically */
287 spin_lock(&config_list_lock);
288 while (rq_state & (RQ_NOW | RQ_LATER)) {
289 /* Any new or requeued lostlocks will change the state */
290 rq_state &= ~(RQ_NOW | RQ_LATER);
291 spin_unlock(&config_list_lock);
293 /* Always wait a few seconds to allow the server who
294 caused the lock revocation to finish its setup, plus some
295 random so everyone doesn't try to reconnect at once. */
296 lwi_now = LWI_TIMEOUT(3 * HZ + (ll_rand() & 0xff) * (HZ / 100),
298 l_wait_event(rq_waitq, rq_state & RQ_STOP, &lwi_now);
300 spin_lock(&config_list_lock);
301 list_for_each_entry_safe(cld, n, &config_llog_list,
303 spin_unlock(&config_list_lock);
305 if (cld->cld_lostlock) {
306 CDEBUG(D_MGC, "updating log %s\n",
308 cld->cld_lostlock = 0;
309 rc = mgc_process_log(cld->cld_mgcexp->exp_obd,
311 /* Whether we enqueued again or not in
312 mgc_process_log, we're done with the ref
313 from the old enqueue */
317 spin_lock(&config_list_lock);
319 spin_unlock(&config_list_lock);
321 /* Wait a bit to see if anyone else needs a requeue */
322 l_wait_event(rq_waitq, rq_state & (RQ_NOW | RQ_STOP),
324 spin_lock(&config_list_lock);
326 /* spinlock and while guarantee RQ_NOW and RQ_LATER are not set */
327 rq_state &= ~RQ_RUNNING;
328 spin_unlock(&config_list_lock);
330 CDEBUG(D_MGC, "Ending requeue thread\n");
334 /* Add a cld to the list to requeue. Start the requeue thread if needed.
335 We are responsible for dropping the config log reference from here on out. */
336 static int mgc_requeue_add(struct config_llog_data *cld, int later)
340 CDEBUG(D_INFO, "log %s: requeue (l=%d r=%d sp=%d st=%x)\n",
341 cld->cld_logname, later, atomic_read(&cld->cld_refcount),
342 cld->cld_stopping, rq_state);
344 /* Hold lock for rq_state */
345 spin_lock(&config_list_lock);
347 if (cld->cld_stopping || (rq_state & RQ_STOP)) {
348 spin_unlock(&config_list_lock);
353 cld->cld_lostlock = 1;
355 if (!(rq_state & RQ_RUNNING)) {
356 LASSERT(rq_state == 0);
357 rq_state = RQ_RUNNING | (later ? RQ_LATER : RQ_NOW);
358 spin_unlock(&config_list_lock);
359 rc = cfs_kernel_thread(mgc_requeue_thread, 0,
360 CLONE_VM | CLONE_FILES);
362 CERROR("log %s: cannot start requeue thread (%d),"
363 "no more log updates!\n", cld->cld_logname, rc);
364 /* Drop the ref, since the rq thread won't */
365 cld->cld_lostlock = 0;
371 rq_state |= later ? RQ_LATER : RQ_NOW;
372 spin_unlock(&config_list_lock);
373 cfs_waitq_signal(&rq_waitq);
379 /********************** class fns **********************/
381 static int mgc_fs_setup(struct obd_device *obd, struct super_block *sb,
382 struct vfsmount *mnt)
384 struct lvfs_run_ctxt saved;
385 struct lustre_sb_info *lsi = s2lsi(sb);
386 struct client_obd *cli = &obd->u.cli;
387 struct dentry *dentry;
393 LASSERT(lsi->lsi_srv_mnt == mnt);
395 /* The mgc fs exclusion sem. Only one fs can be setup at a time. */
396 down(&cli->cl_mgc_sem);
398 cleanup_group_info();
400 obd->obd_fsops = fsfilt_get_ops(MT_STR(lsi->lsi_ldd));
401 if (IS_ERR(obd->obd_fsops)) {
402 up(&cli->cl_mgc_sem);
403 CERROR("No fstype %s rc=%ld\n", MT_STR(lsi->lsi_ldd),
404 PTR_ERR(obd->obd_fsops));
405 RETURN(PTR_ERR(obd->obd_fsops));
408 cli->cl_mgc_vfsmnt = mnt;
409 fsfilt_setup(obd, mnt->mnt_sb);
411 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
412 obd->obd_lvfs_ctxt.pwdmnt = mnt;
413 obd->obd_lvfs_ctxt.pwd = mnt->mnt_root;
414 obd->obd_lvfs_ctxt.fs = get_ds();
416 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
417 dentry = lookup_one_len(MOUNT_CONFIGS_DIR, cfs_fs_pwd(current->fs),
418 strlen(MOUNT_CONFIGS_DIR));
419 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
420 if (IS_ERR(dentry)) {
421 err = PTR_ERR(dentry);
422 CERROR("cannot lookup %s directory: rc = %d\n",
423 MOUNT_CONFIGS_DIR, err);
426 cli->cl_mgc_configs_dir = dentry;
428 /* We take an obd ref to insure that we can't get to mgc_cleanup
429 without calling mgc_fs_cleanup first. */
432 label = fsfilt_get_label(obd, mnt->mnt_sb);
434 CDEBUG(D_MGC, "MGC using disk labelled=%s\n", label);
436 /* We keep the cl_mgc_sem until mgc_fs_cleanup */
440 fsfilt_put_ops(obd->obd_fsops);
441 obd->obd_fsops = NULL;
442 cli->cl_mgc_vfsmnt = NULL;
443 up(&cli->cl_mgc_sem);
447 static int mgc_fs_cleanup(struct obd_device *obd)
449 struct client_obd *cli = &obd->u.cli;
453 LASSERT(cli->cl_mgc_vfsmnt != NULL);
455 if (cli->cl_mgc_configs_dir != NULL) {
456 struct lvfs_run_ctxt saved;
457 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
458 l_dput(cli->cl_mgc_configs_dir);
459 cli->cl_mgc_configs_dir = NULL;
460 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
464 cli->cl_mgc_vfsmnt = NULL;
466 fsfilt_put_ops(obd->obd_fsops);
468 up(&cli->cl_mgc_sem);
473 static atomic_t mgc_count = ATOMIC_INIT(0);
474 static int mgc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
480 case OBD_CLEANUP_EARLY:
482 case OBD_CLEANUP_EXPORTS:
483 if (atomic_dec_and_test(&mgc_count)) {
484 /* Kick the requeue waitq - cld's should all be
486 spin_lock(&config_list_lock);
488 spin_unlock(&config_list_lock);
489 cfs_waitq_signal(&rq_waitq);
491 /* client import will not have been cleaned. */
492 down_write(&obd->u.cli.cl_sem);
493 if (obd->u.cli.cl_import) {
494 struct obd_import *imp;
495 imp = obd->u.cli.cl_import;
496 CERROR("client import never connected\n");
497 class_destroy_import(imp);
498 obd->u.cli.cl_import = NULL;
500 up_write(&obd->u.cli.cl_sem);
502 rc = obd_llog_finish(obd, 0);
504 CERROR("failed to cleanup llogging subsystems\n");
506 case OBD_CLEANUP_SELF_EXP:
508 case OBD_CLEANUP_OBD:
514 static int mgc_cleanup(struct obd_device *obd)
516 struct client_obd *cli = &obd->u.cli;
520 LASSERT(cli->cl_mgc_vfsmnt == NULL);
522 /* COMPAT_146 - old config logs may have added profiles we don't
524 if (obd->obd_type->typ_refcnt <= 1)
525 /* Only for the last mgc */
526 class_del_profiles();
528 lprocfs_obd_cleanup(obd);
531 rc = client_obd_cleanup(obd);
535 static int mgc_setup(struct obd_device *obd, obd_count len, void *buf)
537 struct lprocfs_static_vars lvars;
543 rc = client_obd_setup(obd, len, buf);
545 GOTO(err_decref, rc);
547 rc = obd_llog_init(obd, obd, NULL);
549 CERROR("failed to setup llogging subsystems\n");
550 GOTO(err_cleanup, rc);
553 lprocfs_mgc_init_vars(&lvars);
554 lprocfs_obd_setup(obd, lvars.obd_vars);
556 spin_lock(&config_list_lock);
557 atomic_inc(&mgc_count);
558 if (atomic_read(&mgc_count) == 1) {
559 rq_state &= ~RQ_STOP;
560 cfs_waitq_init(&rq_waitq);
562 spin_unlock(&config_list_lock);
567 client_obd_cleanup(obd);
573 /* based on ll_mdc_blocking_ast */
574 static int mgc_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc,
575 void *data, int flag)
577 struct lustre_handle lockh;
578 struct config_llog_data *cld = (struct config_llog_data *)data;
583 case LDLM_CB_BLOCKING:
584 /* mgs wants the lock, give it up... */
585 LDLM_DEBUG(lock, "MGC blocking CB");
586 ldlm_lock2handle(lock, &lockh);
587 rc = ldlm_cli_cancel(&lockh);
589 case LDLM_CB_CANCELING: {
590 /* We've given up the lock, prepare ourselves to update. */
591 LDLM_DEBUG(lock, "MGC cancel CB");
593 CDEBUG(D_MGC, "Lock res "LPX64" (%.8s)\n",
594 lock->l_resource->lr_name.name[0],
595 (char *)&lock->l_resource->lr_name.name[0]);
598 CERROR("missing data, won't requeue\n");
601 /* Are we done with this log? */
602 if (cld->cld_stopping) {
603 CDEBUG(D_MGC, "log %s: stopping, won't requeue\n",
608 /* Make sure not to re-enqueue when the mgc is stopping
609 (we get called from client_disconnect_export) */
610 if (!lock->l_conn_export ||
611 !lock->l_conn_export->exp_obd->u.cli.cl_conn_count) {
612 CDEBUG(D_MGC, "log %s: disconnecting, won't requeue\n",
617 /* Did we fail to get the lock? */
618 if (lock->l_req_mode != lock->l_granted_mode) {
619 CDEBUG(D_MGC, "log %s: original grant failed, will "
620 "requeue later\n", cld->cld_logname);
621 /* Try to re-enqueue later */
622 rc = mgc_requeue_add(cld, 1);
626 rc = mgc_requeue_add(cld, 0);
635 CERROR("%s CB failed %d:\n", flag == LDLM_CB_BLOCKING ?
636 "blocking" : "cancel", rc);
637 LDLM_ERROR(lock, "MGC ast");
642 /* Take a config lock so we can get cancel notifications */
643 static int mgc_enqueue(struct obd_export *exp, struct lov_stripe_md *lsm,
644 __u32 type, ldlm_policy_data_t *policy, __u32 mode,
645 int *flags, void *bl_cb, void *cp_cb, void *gl_cb,
646 void *data, __u32 lvb_len, void *lvb_swabber,
647 struct lustre_handle *lockh)
649 struct config_llog_data *cld = (struct config_llog_data *)data;
650 struct ldlm_enqueue_info einfo = { type, mode, mgc_blocking_ast,
651 ldlm_completion_ast, NULL, data};
656 CDEBUG(D_MGC, "Enqueue for %s (res "LPX64")\n", cld->cld_logname,
657 cld->cld_resid.name[0]);
659 /* We can only drop this config log ref when we drop the lock */
660 if (config_log_get(cld))
661 RETURN(ELDLM_LOCK_ABORTED);
663 /* We need a callback for every lockholder, so don't try to
664 ldlm_lock_match (see rev 1.1.2.11.2.47) */
666 rc = ldlm_cli_enqueue(exp, NULL, &einfo, cld->cld_resid,
667 NULL, flags, NULL, 0, NULL, lockh, 0);
668 /* A failed enqueue should still call the mgc_blocking_ast,
669 where it will be requeued if needed ("grant failed"). */
674 static int mgc_cancel(struct obd_export *exp, struct lov_stripe_md *md,
675 __u32 mode, struct lustre_handle *lockh, int flags,
680 ldlm_lock_decref(lockh, mode);
686 static int mgc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
687 void *karg, void *uarg)
689 struct obd_device *obd = exp->exp_obd;
690 struct obd_ioctl_data *data = karg;
691 struct llog_ctxt *ctxt;
692 struct lvfs_run_ctxt saved;
696 if (!try_module_get(THIS_MODULE)) {
697 CERROR("Can't get module. Is it alive?");
701 /* REPLicator context */
702 case OBD_IOC_PARSE: {
703 CERROR("MGC parsing llog %s\n", data->ioc_inlbuf1);
704 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
705 rc = class_config_parse_llog(ctxt, data->ioc_inlbuf1, NULL);
709 case OBD_IOC_LLOG_INFO:
710 case OBD_IOC_LLOG_PRINT: {
711 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
712 rc = llog_ioctl(ctxt, cmd, data);
717 /* ORIGinator context */
718 case OBD_IOC_DUMP_LOG: {
719 ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
720 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
721 rc = class_config_dump_llog(ctxt, data->ioc_inlbuf1, NULL);
722 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
729 CERROR("mgc_ioctl(): unrecognised ioctl %#x\n", cmd);
730 GOTO(out, rc = -ENOTTY);
733 module_put(THIS_MODULE);
739 /* Send target_reg message to MGS */
740 static int mgc_target_register(struct obd_export *exp,
741 struct mgs_target_info *mti)
743 struct ptlrpc_request *req;
744 struct mgs_target_info *req_mti, *rep_mti;
745 int size[] = { sizeof(struct ptlrpc_body), sizeof(*req_mti) };
746 int rep_size[] = { sizeof(struct ptlrpc_body), sizeof(*mti) };
750 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MGS_VERSION,
751 MGS_TARGET_REG, 2, size, NULL);
755 req_mti = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*req_mti));
757 ptlrpc_req_finished(req);
761 memcpy(req_mti, mti, sizeof(*req_mti));
762 ptlrpc_req_set_repsize(req, 2, rep_size);
763 CDEBUG(D_MGC, "register %s\n", mti->mti_svname);
765 rc = ptlrpc_queue_wait(req);
767 rep_mti = lustre_swab_repbuf(req, REPLY_REC_OFF,
769 lustre_swab_mgs_target_info);
770 memcpy(mti, rep_mti, sizeof(*rep_mti));
771 CDEBUG(D_MGC, "register %s got index = %d\n",
772 mti->mti_svname, mti->mti_stripe_index);
774 ptlrpc_req_finished(req);
779 /* Send parameter to MGS*/
780 static int mgc_set_mgs_param(struct obd_export *exp,
781 struct mgs_send_param *msp)
783 struct ptlrpc_request *req;
784 struct mgs_send_param *req_msp, *rep_msp;
785 int size[] = { sizeof(struct ptlrpc_body), sizeof(*req_msp) };
786 __u32 rep_size[] = { sizeof(struct ptlrpc_body), sizeof(*msp) };
790 req = ptlrpc_prep_req(class_exp2cliimp(exp), LUSTRE_MGS_VERSION,
791 MGS_SET_INFO, 2, size, NULL);
795 req_msp = lustre_msg_buf(req->rq_reqmsg, REQ_REC_OFF, sizeof(*req_msp));
797 ptlrpc_req_finished(req);
801 memcpy(req_msp, msp, sizeof(*req_msp));
802 ptlrpc_req_set_repsize(req, 2, rep_size);
804 rc = ptlrpc_queue_wait(req);
806 rep_msp = lustre_swab_repbuf(req, REPLY_REC_OFF,
807 sizeof(*rep_msp), NULL);
808 memcpy(msp, rep_msp, sizeof(*rep_msp));
811 ptlrpc_req_finished(req);
816 int mgc_set_info_async(struct obd_export *exp, obd_count keylen,
817 void *key, obd_count vallen, void *val,
818 struct ptlrpc_request_set *set)
820 struct obd_import *imp = class_exp2cliimp(exp);
824 /* Try to "recover" the initial connection; i.e. retry */
825 if (KEY_IS(KEY_INIT_RECOV)) {
826 if (vallen != sizeof(int))
828 spin_lock(&imp->imp_lock);
829 imp->imp_initial_recov = *(int *)val;
830 spin_unlock(&imp->imp_lock);
831 CDEBUG(D_HA, "%s: set imp_initial_recov = %d\n",
832 exp->exp_obd->obd_name, imp->imp_initial_recov);
835 /* Turn off initial_recov after we try all backup servers once */
836 if (KEY_IS(KEY_INIT_RECOV_BACKUP)) {
838 if (vallen != sizeof(int))
841 spin_lock(&imp->imp_lock);
842 imp->imp_initial_recov_bk = value > 0;
843 /* Even after the initial connection, give up all comms if
844 nobody answers the first time. */
845 imp->imp_recon_bk = 1;
846 spin_unlock(&imp->imp_lock);
847 CDEBUG(D_MGC, "InitRecov %s %d/%d:d%d:i%d:r%d:or%d:%s\n",
848 imp->imp_obd->obd_name, value, imp->imp_initial_recov,
849 imp->imp_deactive, imp->imp_invalid,
850 imp->imp_replayable, imp->imp_obd->obd_replayable,
851 ptlrpc_import_state_name(imp->imp_state));
852 /* Resurrect if we previously died */
853 if (imp->imp_invalid || value > 1)
854 ptlrpc_reconnect_import(imp);
857 /* FIXME move this to mgc_process_config */
858 if (KEY_IS(KEY_REGISTER_TARGET)) {
859 struct mgs_target_info *mti;
860 if (vallen != sizeof(struct mgs_target_info))
862 mti = (struct mgs_target_info *)val;
863 CDEBUG(D_MGC, "register_target %s %#x\n",
864 mti->mti_svname, mti->mti_flags);
865 rc = mgc_target_register(exp, mti);
868 if (KEY_IS(KEY_SET_FS)) {
869 struct super_block *sb = (struct super_block *)val;
870 struct lustre_sb_info *lsi;
871 if (vallen != sizeof(struct super_block))
874 rc = mgc_fs_setup(exp->exp_obd, sb, lsi->lsi_srv_mnt);
876 CERROR("set_fs got %d\n", rc);
880 if (KEY_IS(KEY_CLEAR_FS)) {
883 rc = mgc_fs_cleanup(exp->exp_obd);
885 CERROR("clear_fs got %d\n", rc);
889 if (KEY_IS(KEY_SET_INFO)) {
890 struct mgs_send_param *msp;
892 msp = (struct mgs_send_param *)val;
893 rc = mgc_set_mgs_param(exp, msp);
900 static int mgc_import_event(struct obd_device *obd,
901 struct obd_import *imp,
902 enum obd_import_event event)
906 LASSERT(imp->imp_obd == obd);
907 CDEBUG(D_MGC, "import event %#x\n", event);
910 case IMP_EVENT_DISCON:
912 case IMP_EVENT_INACTIVE:
914 case IMP_EVENT_INVALIDATE: {
915 struct ldlm_namespace *ns = obd->obd_namespace;
916 ldlm_namespace_cleanup(ns, LDLM_FL_LOCAL_ONLY);
919 case IMP_EVENT_ACTIVE:
920 LCONSOLE_WARN("%s: Reactivating import\n", obd->obd_name);
921 /* Clearing obd_no_recov allows us to continue pinging */
922 obd->obd_no_recov = 0;
927 CERROR("Unknown import event %#x\n", event);
933 static int mgc_llog_init(struct obd_device *obd, struct obd_device *disk_obd,
936 struct llog_ctxt *ctxt;
940 rc = llog_setup(obd, LLOG_CONFIG_ORIG_CTXT, disk_obd, 0, NULL,
945 rc = llog_setup(obd, LLOG_CONFIG_REPL_CTXT, disk_obd, 0, NULL,
948 ctxt = llog_get_context(obd, LLOG_CONFIG_REPL_CTXT);
949 llog_initiator_connect(ctxt);
952 ctxt = llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT);
960 static int mgc_llog_finish(struct obd_device *obd, int count)
965 rc = llog_cleanup(llog_get_context(obd, LLOG_CONFIG_REPL_CTXT));
966 rc = llog_cleanup(llog_get_context(obd, LLOG_CONFIG_ORIG_CTXT));
971 /* identical to mgs_log_is_empty */
972 static int mgc_llog_is_empty(struct obd_device *obd, struct llog_ctxt *ctxt,
975 struct lvfs_run_ctxt saved;
976 struct llog_handle *llh;
979 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
980 rc = llog_create(ctxt, &llh, NULL, name);
982 llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
983 rc = llog_get_size(llh);
986 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
987 /* header is record 1 */
991 static int mgc_copy_handler(struct llog_handle *llh, struct llog_rec_hdr *rec,
994 struct llog_rec_hdr local_rec = *rec;
995 struct llog_handle *local_llh = (struct llog_handle *)data;
996 char *cfg_buf = (char*) (rec + 1);
997 struct lustre_cfg *lcfg;
1001 /* Append all records */
1002 local_rec.lrh_len -= sizeof(*rec) + sizeof(struct llog_rec_tail);
1003 rc = llog_write_rec(local_llh, &local_rec, NULL, 0,
1004 (void *)cfg_buf, -1);
1006 lcfg = (struct lustre_cfg *)cfg_buf;
1007 CDEBUG(D_INFO, "idx=%d, rc=%d, len=%d, cmd %x %s %s\n",
1008 rec->lrh_index, rc, rec->lrh_len, lcfg->lcfg_command,
1009 lustre_cfg_string(lcfg, 0), lustre_cfg_string(lcfg, 1));
1014 /* Copy a remote log locally */
1015 static int mgc_copy_llog(struct obd_device *obd, struct llog_ctxt *rctxt,
1016 struct llog_ctxt *lctxt, char *logname)
1018 struct llog_handle *local_llh, *remote_llh;
1019 struct obd_uuid *uuid;
1024 /* Write new log to a temp name, then vfs_rename over logname
1025 upon successful completion. */
1027 OBD_ALLOC(temp_log, strlen(logname) + 1);
1030 sprintf(temp_log, "%sT", logname);
1032 /* Make sure there's no old temp log */
1033 rc = llog_create(lctxt, &local_llh, NULL, temp_log);
1036 rc = llog_init_handle(local_llh, LLOG_F_IS_PLAIN, NULL);
1039 rc = llog_destroy(local_llh);
1040 llog_free_handle(local_llh);
1044 /* open local log */
1045 rc = llog_create(lctxt, &local_llh, NULL, temp_log);
1049 /* set the log header uuid for fun */
1050 OBD_ALLOC_PTR(uuid);
1051 obd_str2uuid(uuid, logname);
1052 rc = llog_init_handle(local_llh, LLOG_F_IS_PLAIN, uuid);
1055 GOTO(out_closel, rc);
1057 /* open remote log */
1058 rc = llog_create(rctxt, &remote_llh, NULL, logname);
1060 GOTO(out_closel, rc);
1061 rc = llog_init_handle(remote_llh, LLOG_F_IS_PLAIN, NULL);
1063 GOTO(out_closer, rc);
1065 /* Copy remote log */
1066 rc = llog_process(remote_llh, mgc_copy_handler,(void *)local_llh, NULL);
1069 rc2 = llog_close(remote_llh);
1073 rc2 = llog_close(local_llh);
1077 /* We've copied the remote log to the local temp log, now
1078 replace the old local log with the temp log. */
1080 struct client_obd *cli = &obd->u.cli;
1082 LASSERT(cli->cl_mgc_configs_dir);
1083 rc = lustre_rename(cli->cl_mgc_configs_dir, cli->cl_mgc_vfsmnt,
1086 CDEBUG(D_MGC, "Copied remote log %s (%d)\n", logname, rc);
1089 CERROR("Failed to copy remote log %s (%d)\n", logname, rc);
1090 OBD_FREE(temp_log, strlen(logname) + 1);
1094 /* Get a config log from the MGS and process it.
1095 This func is called for both clients and servers. */
1096 static int mgc_process_log(struct obd_device *mgc,
1097 struct config_llog_data *cld)
1099 struct llog_ctxt *ctxt, *lctxt;
1100 struct lustre_handle lockh;
1101 struct client_obd *cli = &mgc->u.cli;
1102 struct lvfs_run_ctxt saved;
1103 struct lustre_sb_info *lsi;
1104 int rc = 0, rcl, flags = 0, must_pop = 0;
1107 if (!cld || !cld->cld_cfg.cfg_sb) {
1108 /* This should never happen */
1109 CERROR("Missing cld, aborting log update\n");
1113 /* Serialize update from the same log */
1114 down(&cld->cld_sem);
1115 if (cld->cld_stopping) {
1120 OBD_FAIL_TIMEOUT(OBD_FAIL_MGC_PAUSE_PROCESS_LOG, 20);
1122 lsi = s2lsi(cld->cld_cfg.cfg_sb);
1124 CDEBUG(D_MGC, "Process log %s:%s from %d\n", cld->cld_logname,
1125 cld->cld_cfg.cfg_instance, cld->cld_cfg.cfg_last_idx + 1);
1127 ctxt = llog_get_context(mgc, LLOG_CONFIG_REPL_CTXT);
1130 CERROR("missing llog context\n");
1134 /* Get the cfg lock on the llog */
1135 rcl = mgc_enqueue(mgc->u.cli.cl_mgc_mgsexp, NULL, LDLM_PLAIN, NULL,
1136 LCK_CR, &flags, NULL, NULL, NULL,
1137 cld, 0, NULL, &lockh);
1139 CDEBUG(D_MGC, "Can't get cfg lock: %d\n", rcl);
1141 lctxt = llog_get_context(mgc, LLOG_CONFIG_ORIG_CTXT);
1143 /* Copy the setup log locally if we can. Don't mess around if we're
1144 running an MGS though (logs are already local). */
1145 if (lctxt && lsi && (lsi->lsi_flags & LSI_SERVER) &&
1146 (lsi->lsi_srv_mnt == cli->cl_mgc_vfsmnt) &&
1147 !IS_MGS(lsi->lsi_ldd)) {
1148 push_ctxt(&saved, &mgc->obd_lvfs_ctxt, NULL);
1151 /* Only try to copy log if we have the lock. */
1152 rc = mgc_copy_llog(mgc, ctxt, lctxt, cld->cld_logname);
1154 if (mgc_llog_is_empty(mgc, lctxt, cld->cld_logname)) {
1155 LCONSOLE_ERROR_MSG(0x13a, "Failed to get MGS "
1156 "log %s and no local copy."
1157 "\n", cld->cld_logname);
1158 GOTO(out_pop, rc = -ENOTCONN);
1160 CDEBUG(D_MGC, "Failed to get MGS log %s, using local "
1161 "copy for now, will try to update later.\n",
1164 /* Now, whether we copied or not, start using the local llog.
1165 If we failed to copy, we'll start using whatever the old
1167 llog_ctxt_put(ctxt);
1171 /* logname and instance info should be the same, so use our
1172 copy of the instance for the update. The cfg_last_idx will
1174 rc = class_config_parse_llog(ctxt, cld->cld_logname, &cld->cld_cfg);
1177 llog_ctxt_put(ctxt);
1179 llog_ctxt_put(lctxt);
1181 pop_ctxt(&saved, &mgc->obd_lvfs_ctxt, NULL);
1183 /* Now drop the lock so MGS can revoke it */
1185 rcl = mgc_cancel(mgc->u.cli.cl_mgc_mgsexp, NULL,
1186 LCK_CR, &lockh, 0, 0);
1188 CERROR("Can't drop cfg lock: %d\n", rcl);
1192 CDEBUG(D_MGC, "%s: configuration from log '%s' %sed (%d).\n",
1193 mgc->obd_name, cld->cld_logname, rc ? "fail" : "succeed", rc);
1198 static int mgc_process_config(struct obd_device *obd, obd_count len, void *buf)
1200 struct lustre_cfg *lcfg = buf;
1205 switch(cmd = lcfg->lcfg_command) {
1206 case LCFG_LOV_ADD_OBD: {
1207 /* Add any new target, not just osts */
1208 struct mgs_target_info *mti;
1210 if (LUSTRE_CFG_BUFLEN(lcfg, 1) !=
1211 sizeof(struct mgs_target_info))
1212 GOTO(out, rc = -EINVAL);
1214 mti = (struct mgs_target_info *)lustre_cfg_buf(lcfg, 1);
1215 CDEBUG(D_MGC, "add_target %s %#x\n",
1216 mti->mti_svname, mti->mti_flags);
1217 rc = mgc_target_register(obd->u.cli.cl_mgc_mgsexp, mti);
1220 case LCFG_LOV_DEL_OBD:
1221 /* Remove target from the fs? */
1223 CERROR("lov_del_obd unimplemented\n");
1226 case LCFG_LOG_START: {
1227 struct config_llog_data *cld;
1228 struct config_llog_instance *cfg;
1229 struct super_block *sb;
1230 char *logname = lustre_cfg_string(lcfg, 1);
1231 cfg = (struct config_llog_instance *)lustre_cfg_buf(lcfg, 2);
1232 sb = *(struct super_block **)lustre_cfg_buf(lcfg, 3);
1234 CDEBUG(D_MGC, "parse_log %s from %d\n", logname,
1237 /* We're only called through here on the initial mount */
1238 rc = config_log_add(logname, cfg, sb);
1241 cld = config_log_find(logname, cfg);
1248 /* FIXME only set this for old logs! Right now this forces
1249 us to always skip the "inside markers" check */
1250 cld->cld_cfg.cfg_flags |= CFG_F_COMPAT146;
1252 rc = mgc_process_log(obd, cld);
1253 config_log_put(cld);
1257 case LCFG_LOG_END: {
1258 struct config_llog_instance *cfg = NULL;
1259 char *logname = lustre_cfg_string(lcfg, 1);
1260 if (lcfg->lcfg_bufcount >= 2)
1261 cfg = (struct config_llog_instance *)lustre_cfg_buf(
1263 rc = config_log_end(logname, cfg);
1267 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1268 GOTO(out, rc = -EINVAL);
1276 struct obd_ops mgc_obd_ops = {
1277 .o_owner = THIS_MODULE,
1278 .o_setup = mgc_setup,
1279 .o_precleanup = mgc_precleanup,
1280 .o_cleanup = mgc_cleanup,
1281 .o_add_conn = client_import_add_conn,
1282 .o_del_conn = client_import_del_conn,
1283 .o_connect = client_connect_import,
1284 .o_disconnect = client_disconnect_export,
1285 //.o_enqueue = mgc_enqueue,
1286 .o_cancel = mgc_cancel,
1287 //.o_iocontrol = mgc_iocontrol,
1288 .o_set_info_async = mgc_set_info_async,
1289 .o_import_event = mgc_import_event,
1290 .o_llog_init = mgc_llog_init,
1291 .o_llog_finish = mgc_llog_finish,
1292 .o_process_config = mgc_process_config,
1295 int __init mgc_init(void)
1297 return class_register_type(&mgc_obd_ops, NULL, LUSTRE_MGC_NAME);
1301 static void /*__exit*/ mgc_exit(void)
1303 class_unregister_type(LUSTRE_MGC_NAME);
1306 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
1307 MODULE_DESCRIPTION("Lustre Management Client");
1308 MODULE_LICENSE("GPL");
1310 module_init(mgc_init);
1311 module_exit(mgc_exit);