lustre/obdclass/obd_config.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  *  Copyright (c) 2001-2006 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of the Lustre file system, http://www.lustre.org
   7  *   Lustre is a trademark of Cluster File Systems, Inc.
   8  *
   9  *   You may have signed or agreed to another license before downloading
  10  *   this software.  If so, you are bound by the terms and conditions
  11  *   of that agreement, and the following does not apply to you.  See the
  12  *   LICENSE file included with this distribution for more information.
  13  *
  14  *   If you did not agree to a different license, then this copy of Lustre
  15  *   is open source software; you can redistribute it and/or modify it
  16  *   under the terms of version 2 of the GNU General Public License as
  17  *   published by the Free Software Foundation.
  18  *
  19  *   In either case, Lustre is distributed in the hope that it will be
  20  *   useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  21  *   of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *   license text for more details.
  23  *
  24  * Config API
  25  *
  26  */
  27
  28 #define DEBUG_SUBSYSTEM S_CLASS
  29 #ifdef __KERNEL__
  30 #include <obd_class.h>
  31 #include <linux/string.h>
  32 #else
  33 #include <liblustre.h>
  34 #include <obd_class.h>
  35 #include <obd.h>
  36 #endif
  37 #include <lustre_log.h>
  38 #include <lprocfs_status.h>
  39 #include <libcfs/list.h>
  40 #include <lustre_param.h>
  41 #include <class_hash.h>
  42
  43 extern struct lustre_hash_operations uuid_hash_operations;
  44 extern struct lustre_hash_operations nid_hash_operations;
  45
  46 /*********** string parsing utils *********/
  47
  48 /* returns 0 if we find this key in the buffer, else 1 */
  49 int class_find_param(char *buf, char *key, char **valp)
  50 {
  51         char *ptr;
  52
  53         if (!buf)
  54                 return 1;
  55
  56         if ((ptr = strstr(buf, key)) == NULL)
  57                 return 1;
  58
  59         if (valp)
  60                 *valp = ptr + strlen(key);
  61
  62         return 0;
  63 }
  64
  65 /* returns 0 if this is the first key in the buffer, else 1.
  66    valp points to first char after key. */
  67 int class_match_param(char *buf, char *key, char **valp)
  68 {
  69         if (!buf)
  70                 return 1;
  71
  72         if (memcmp(buf, key, strlen(key)) != 0)
  73                 return 1;
  74
  75         if (valp)
  76                 *valp = buf + strlen(key);
  77
  78         return 0;
  79 }
  80
  81 /* 0 is good nid,
  82    1 not found
  83    < 0 error
  84    endh is set to next separator */
  85 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
  86 {
  87         char tmp, *endp;
  88
  89         if (!buf)
  90                 return 1;
  91         while (*buf == ',' || *buf == ':')
  92                 buf++;
  93         if (*buf == ' ' || *buf == '/' || *buf == '\0')
  94                 return 1;
  95
  96         /* nid separators or end of nids */
  97         endp = strpbrk(buf, ",: /");
  98         if (endp == NULL)
  99                 endp = buf + strlen(buf);
 100
 101         tmp = *endp;
 102         *endp = '\0';
 103         *nid = libcfs_str2nid(buf);
 104         if (*nid == LNET_NID_ANY) {
 105                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 106                 *endp = tmp;
 107                 return -EINVAL;
 108         }
 109         *endp = tmp;
 110
 111         if (endh)
 112                 *endh = endp;
 113         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
 114         return 0;
 115 }
 116
 117 EXPORT_SYMBOL(class_find_param);
 118 EXPORT_SYMBOL(class_match_param);
 119 EXPORT_SYMBOL(class_parse_nid);
 120
 121 /********************** class fns **********************/
 122
 123 /**
 124  * Create a new device and set the type, name and uuid.  If successful, the new
 125  * device can be accessed by either name or uuid.
 126  */
 127 int class_attach(struct lustre_cfg *lcfg)
 128 {
 129         struct obd_device *obd = NULL;
 130         char *typename, *name, *uuid;
 131         int rc, len;
 132         ENTRY;
 133
 134         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 135                 CERROR("No type passed!\n");
 136                 RETURN(-EINVAL);
 137         }
 138         typename = lustre_cfg_string(lcfg, 1);
 139
 140         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 141                 CERROR("No name passed!\n");
 142                 RETURN(-EINVAL);
 143         }
 144         name = lustre_cfg_string(lcfg, 0);
 145
 146         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 147                 CERROR("No UUID passed!\n");
 148                 RETURN(-EINVAL);
 149         }
 150         uuid = lustre_cfg_string(lcfg, 2);
 151
 152         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 153                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 154
 155         obd = class_newdev(typename, name);
 156         if (IS_ERR(obd)) {
 157                 /* Already exists or out of obds */
 158                 rc = PTR_ERR(obd);
 159                 obd = NULL;
 160                 CERROR("Cannot create device %s of type %s : %d\n",
 161                        name, typename, rc);
 162                 GOTO(out, rc);
 163         }
 164         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 165                  name, typename);
 166         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 167                  "obd %p obd_magic %08X != %08X\n",
 168                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 169         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0, "%p obd_name %s != %s\n",
 170                  obd, obd->obd_name, name);
 171
 172         rwlock_init(&obd->obd_pool_lock);
 173         obd->obd_pool_limit = 0;
 174         obd->obd_pool_slv = 0;
 175
 176         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 177         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 178         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 179         spin_lock_init(&obd->obd_nid_lock);
 180         spin_lock_init(&obd->obd_dev_lock);
 181         sema_init(&obd->obd_dev_sem, 1);
 182         spin_lock_init(&obd->obd_osfs_lock);
 183         /* obd->obd_osfs_age must be set to a value in the distant
 184          * past to guarantee a fresh statfs is fetched on mount. */
 185         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 186
 187         /* XXX belongs in setup not attach  */
 188         /* recovery data */
 189         cfs_init_timer(&obd->obd_recovery_timer);
 190         spin_lock_init(&obd->obd_processing_task_lock);
 191         cfs_waitq_init(&obd->obd_next_transno_waitq);
 192         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 193         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 194         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 195         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 196
 197         llog_group_init(&obd->obd_olg, OBD_LLOG_GROUP);
 198
 199         spin_lock_init(&obd->obd_uncommitted_replies_lock);
 200         CFS_INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
 201
 202         len = strlen(uuid);
 203         if (len >= sizeof(obd->obd_uuid)) {
 204                 CERROR("uuid must be < %d bytes long\n",
 205                        (int)sizeof(obd->obd_uuid));
 206                 GOTO(out, rc = -EINVAL);
 207         }
 208         memcpy(obd->obd_uuid.uuid, uuid, len);
 209
 210         /* do the attach */
 211         if (OBP(obd, attach)) {
 212                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 213                 if (rc)
 214                         GOTO(out, rc = -EINVAL);
 215         }
 216
 217         /* Detach drops this */
 218         spin_lock(&obd->obd_dev_lock);
 219         atomic_set(&obd->obd_refcount, 1);
 220         spin_unlock(&obd->obd_dev_lock);
 221
 222         obd->obd_attached = 1;
 223         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 224                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 225         RETURN(0);
 226  out:
 227         if (obd != NULL) {
 228                 class_release_dev(obd);
 229         }
 230         return rc;
 231 }
 232
 233 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 234 {
 235         int err = 0;
 236         struct obd_export *exp;
 237         ENTRY;
 238
 239         LASSERT(obd != NULL);
 240         LASSERTF(obd == class_num2obd(obd->obd_minor), "obd %p != obd_devs[%d] %p\n",
 241                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 242         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n",
 243                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 244
 245         /* have we attached a type to this device? */
 246         if (!obd->obd_attached) {
 247                 CERROR("Device %d not attached\n", obd->obd_minor);
 248                 RETURN(-ENODEV);
 249         }
 250
 251         if (obd->obd_set_up) {
 252                 CERROR("Device %d already setup (type %s)\n",
 253                        obd->obd_minor, obd->obd_type->typ_name);
 254                 RETURN(-EEXIST);
 255         }
 256
 257         /* is someone else setting us up right now? (attach inits spinlock) */
 258         spin_lock(&obd->obd_dev_lock);
 259         if (obd->obd_starting) {
 260                 spin_unlock(&obd->obd_dev_lock);
 261                 CERROR("Device %d setup in progress (type %s)\n",
 262                        obd->obd_minor, obd->obd_type->typ_name);
 263                 RETURN(-EEXIST);
 264         }
 265         /* just leave this on forever.  I can't use obd_set_up here because
 266            other fns check that status, and we're not actually set up yet. */
 267         obd->obd_starting = 1;
 268         spin_unlock(&obd->obd_dev_lock);
 269
 270         /* create an uuid-export hash body */
 271         err = lustre_hash_init(&obd->obd_uuid_hash_body, "UUID_HASH",
 272                                128, &uuid_hash_operations);
 273         if (err)
 274                 GOTO(err_hash, err);
 275
 276         /* create a nid-export hash body */
 277         err = lustre_hash_init(&obd->obd_nid_hash_body, "NID_HASH",
 278                                128, &nid_hash_operations);
 279         if (err)
 280                 GOTO(err_hash, err);
 281
 282         /* create a nid-stats hash body */
 283         err = lustre_hash_init(&obd->obd_nid_stats_hash_body, "NID_STATS",
 284                                128, &nid_stat_hash_operations);
 285         if (err)
 286                 GOTO(err_hash, err);
 287
 288         exp = class_new_export(obd, &obd->obd_uuid);
 289         if (IS_ERR(exp))
 290                 RETURN(PTR_ERR(exp));
 291
 292         obd->obd_self_export = exp;
 293         list_del_init(&exp->exp_obd_chain_timed);
 294         class_export_put(exp);
 295
 296         err = obd_setup(obd, lcfg);
 297         if (err)
 298                 GOTO(err_exp, err);
 299
 300         obd->obd_set_up = 1;
 301
 302         spin_lock(&obd->obd_dev_lock);
 303         /* cleanup drops this */
 304         class_incref(obd);
 305         spin_unlock(&obd->obd_dev_lock);
 306
 307         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 308                obd->obd_name, obd->obd_uuid.uuid);
 309
 310         RETURN(0);
 311
 312 err_exp:
 313         class_unlink_export(obd->obd_self_export);
 314         obd->obd_self_export = NULL;
 315 err_hash:
 316         lustre_hash_exit(&obd->obd_uuid_hash_body);
 317         lustre_hash_exit(&obd->obd_nid_hash_body);
 318         lustre_hash_exit(&obd->obd_nid_stats_hash_body);
 319         obd->obd_starting = 0;
 320         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 321         RETURN(err);
 322 }
 323
 324 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 325 {
 326         ENTRY;
 327
 328         if (obd->obd_set_up) {
 329                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 330                 RETURN(-EBUSY);
 331         }
 332
 333         spin_lock(&obd->obd_dev_lock);
 334         if (!obd->obd_attached) {
 335                 spin_unlock(&obd->obd_dev_lock);
 336                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 337                 RETURN(-ENODEV);
 338         }
 339         obd->obd_attached = 0;
 340         spin_unlock(&obd->obd_dev_lock);
 341
 342         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 343                obd->obd_name, obd->obd_uuid.uuid);
 344
 345         class_decref(obd);
 346
 347         /* not strictly necessary, but cleans up eagerly */
 348         obd_zombie_impexp_cull();
 349
 350         RETURN(0);
 351 }
 352
 353 static void dump_exports(struct obd_device *obd)
 354 {
 355         struct obd_export *exp, *n;
 356
 357         list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
 358                 struct ptlrpc_reply_state *rs;
 359                 struct ptlrpc_reply_state *first_reply = NULL;
 360                 int                        nreplies = 0;
 361
 362                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 363                                      rs_exp_list) {
 364                         if (nreplies == 0)
 365                                 first_reply = rs;
 366                         nreplies++;
 367                 }
 368
 369                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 370                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 371                        obd_export_nid2str(exp),
 372                        atomic_read(&exp->exp_refcount),
 373                        exp->exp_failed, nreplies, first_reply,
 374                        nreplies > 3 ? "..." : "");
 375         }
 376 }
 377
 378 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 379 {
 380         int err = 0;
 381         char *flag;
 382         ENTRY;
 383
 384         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 385
 386         if (!obd->obd_set_up) {
 387                 CERROR("Device %d not setup\n", obd->obd_minor);
 388                 RETURN(-ENODEV);
 389         }
 390
 391         spin_lock(&obd->obd_dev_lock);
 392         if (obd->obd_stopping) {
 393                 spin_unlock(&obd->obd_dev_lock);
 394                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 395                 RETURN(-ENODEV);
 396         }
 397         /* Leave this on forever */
 398         obd->obd_stopping = 1;
 399         spin_unlock(&obd->obd_dev_lock);
 400
 401         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 402                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 403                         switch (*flag) {
 404                         case 'F':
 405                                 obd->obd_force = 1;
 406                                 break;
 407                         case 'A':
 408                                 LCONSOLE_WARN("Failing over %s\n",
 409                                               obd->obd_name);
 410                                 obd->obd_fail = 1;
 411                                 obd->obd_no_transno = 1;
 412                                 obd->obd_no_recov = 1;
 413                                 /* Set the obd readonly if we can */
 414                                 if (OBP(obd, iocontrol))
 415                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 416                                                       obd->obd_self_export,
 417                                                       0, NULL, NULL);
 418                                 break;
 419                         default:
 420                                 CERROR("unrecognised flag '%c'\n",
 421                                        *flag);
 422                         }
 423         }
 424
 425         /* The three references that should be remaining are the
 426          * obd_self_export and the attach and setup references. */
 427         if (atomic_read(&obd->obd_refcount) > 3) {
 428 #if 0           /* We should never fail to cleanup with mountconf */
 429                 if (!(obd->obd_fail || obd->obd_force)) {
 430                         CERROR("OBD %s is still busy with %d references\n"
 431                                "You should stop active file system users,"
 432                                " or use the --force option to cleanup.\n",
 433                                obd->obd_name, atomic_read(&obd->obd_refcount));
 434                         dump_exports(obd);
 435                         /* Allow a failed cleanup to try again. */
 436                         obd->obd_stopping = 0;
 437                 }
 438 #endif
 439                 /* refcounf - 3 might be the number of real exports
 440                    (excluding self export). But class_incref is called
 441                    by other things as well, so don't count on it. */
 442                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 443                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 444                 dump_exports(obd);
 445                 class_disconnect_exports(obd);
 446         }
 447         LASSERT(obd->obd_self_export);
 448
 449         /* destroy an uuid-export hash body */
 450         lustre_hash_exit(&obd->obd_uuid_hash_body);
 451
 452         /* destroy a nid-export hash body */
 453         lustre_hash_exit(&obd->obd_nid_hash_body);
 454
 455         /* destroy a nid-stats hash body */
 456         lustre_hash_exit(&obd->obd_nid_stats_hash_body);
 457
 458         /* Precleanup, we must make sure all exports get destroyed. */
 459         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 460         if (err)
 461                 CERROR("Precleanup %s returned %d\n",
 462                        obd->obd_name, err);
 463
 464         class_decref(obd);
 465         obd->obd_set_up = 0;
 466         RETURN(0);
 467 }
 468
 469 struct obd_device *class_incref(struct obd_device *obd)
 470 {
 471         atomic_inc(&obd->obd_refcount);
 472         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 473                atomic_read(&obd->obd_refcount));
 474
 475         return obd;
 476 }
 477
 478 void class_decref(struct obd_device *obd)
 479 {
 480         int err;
 481         int refs;
 482
 483         spin_lock(&obd->obd_dev_lock);
 484         atomic_dec(&obd->obd_refcount);
 485         refs = atomic_read(&obd->obd_refcount);
 486         spin_unlock(&obd->obd_dev_lock);
 487
 488         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 489
 490         if ((refs == 1) && obd->obd_stopping) {
 491                 /* All exports have been destroyed; there should
 492                    be no more in-progress ops by this point.*/
 493
 494                 spin_lock(&obd->obd_self_export->exp_lock);
 495                 obd->obd_self_export->exp_flags |=
 496                         (obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 497                         (obd->obd_force ? OBD_OPT_FORCE : 0);
 498                 spin_unlock(&obd->obd_self_export->exp_lock);
 499
 500                 /* note that we'll recurse into class_decref again */
 501                 class_unlink_export(obd->obd_self_export);
 502                 return;
 503         }
 504
 505         if (refs == 0) {
 506                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 507                        obd->obd_name, obd->obd_uuid.uuid);
 508                 LASSERT(!obd->obd_attached);
 509                 if (obd->obd_stopping) {
 510                         /* If we're not stopping, we were never set up */
 511                         err = obd_cleanup(obd);
 512                         if (err)
 513                                 CERROR("Cleanup %s returned %d\n",
 514                                        obd->obd_name, err);
 515                 }
 516                 if (OBP(obd, detach)) {
 517                         err = OBP(obd,detach)(obd);
 518                         if (err)
 519                                 CERROR("Detach returned %d\n", err);
 520                 }
 521                 class_release_dev(obd);
 522         }
 523 }
 524
 525 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 526 {
 527         struct obd_import *imp;
 528         struct obd_uuid uuid;
 529         int rc;
 530         ENTRY;
 531
 532         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 533             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 534                 CERROR("invalid conn_uuid\n");
 535                 RETURN(-EINVAL);
 536         }
 537         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 538             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 539             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 540                 CERROR("can't add connection on non-client dev\n");
 541                 RETURN(-EINVAL);
 542         }
 543
 544         imp = obd->u.cli.cl_import;
 545         if (!imp) {
 546                 CERROR("try to add conn on immature client dev\n");
 547                 RETURN(-EINVAL);
 548         }
 549
 550         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 551         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 552
 553         RETURN(rc);
 554 }
 555
 556 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 557 {
 558         struct obd_import *imp;
 559         struct obd_uuid uuid;
 560         int rc;
 561         ENTRY;
 562
 563         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 564             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 565                 CERROR("invalid conn_uuid\n");
 566                 RETURN(-EINVAL);
 567         }
 568         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 569             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 570                 CERROR("can't del connection on non-client dev\n");
 571                 RETURN(-EINVAL);
 572         }
 573
 574         imp = obd->u.cli.cl_import;
 575         if (!imp) {
 576                 CERROR("try to del conn on immature client dev\n");
 577                 RETURN(-EINVAL);
 578         }
 579
 580         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 581         rc = obd_del_conn(imp, &uuid);
 582
 583         RETURN(rc);
 584 }
 585
 586 CFS_LIST_HEAD(lustre_profile_list);
 587
 588 struct lustre_profile *class_get_profile(const char * prof)
 589 {
 590         struct lustre_profile *lprof;
 591
 592         ENTRY;
 593         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 594                 if (!strcmp(lprof->lp_profile, prof)) {
 595                         RETURN(lprof);
 596                 }
 597         }
 598         RETURN(NULL);
 599 }
 600
 601 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 602                       int mdclen, char *mdc)
 603 {
 604         struct lustre_profile *lprof;
 605         int err = 0;
 606         ENTRY;
 607
 608         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 609
 610         OBD_ALLOC(lprof, sizeof(*lprof));
 611         if (lprof == NULL)
 612                 RETURN(-ENOMEM);
 613         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 614
 615         LASSERT(proflen == (strlen(prof) + 1));
 616         OBD_ALLOC(lprof->lp_profile, proflen);
 617         if (lprof->lp_profile == NULL)
 618                 GOTO(out, err = -ENOMEM);
 619         memcpy(lprof->lp_profile, prof, proflen);
 620
 621         LASSERT(osclen == (strlen(osc) + 1));
 622         OBD_ALLOC(lprof->lp_dt, osclen);
 623         if (lprof->lp_dt == NULL)
 624                 GOTO(out, err = -ENOMEM);
 625         memcpy(lprof->lp_dt, osc, osclen);
 626
 627         if (mdclen > 0) {
 628                 LASSERT(mdclen == (strlen(mdc) + 1));
 629                 OBD_ALLOC(lprof->lp_md, mdclen);
 630                 if (lprof->lp_md == NULL)
 631                         GOTO(out, err = -ENOMEM);
 632                 memcpy(lprof->lp_md, mdc, mdclen);
 633         }
 634
 635         list_add(&lprof->lp_list, &lustre_profile_list);
 636         RETURN(err);
 637
 638 out:
 639         if (lprof->lp_md)
 640                 OBD_FREE(lprof->lp_md, mdclen);
 641         if (lprof->lp_dt)
 642                 OBD_FREE(lprof->lp_dt, osclen);
 643         if (lprof->lp_profile)
 644                 OBD_FREE(lprof->lp_profile, proflen);
 645         OBD_FREE(lprof, sizeof(*lprof));
 646         RETURN(err);
 647 }
 648
 649 void class_del_profile(const char *prof)
 650 {
 651         struct lustre_profile *lprof;
 652         ENTRY;
 653
 654         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 655
 656         lprof = class_get_profile(prof);
 657         if (lprof) {
 658                 list_del(&lprof->lp_list);
 659                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 660                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 661                 if (lprof->lp_md)
 662                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 663                 OBD_FREE(lprof, sizeof *lprof);
 664         }
 665         EXIT;
 666 }
 667
 668 /* COMPAT_146 */
 669 void class_del_profiles(void)
 670 {
 671         struct lustre_profile *lprof, *n;
 672         ENTRY;
 673
 674         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 675                 list_del(&lprof->lp_list);
 676                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 677                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 678                 if (lprof->lp_md)
 679                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 680                 OBD_FREE(lprof, sizeof *lprof);
 681         }
 682         EXIT;
 683 }
 684
 685 /* We can't call ll_process_config directly because it lives in a module that
 686    must be loaded after this one. */
 687 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 688
 689 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 690 {
 691         client_process_config = cpc;
 692 }
 693 EXPORT_SYMBOL(lustre_register_client_process_config);
 694
 695 int class_process_config(struct lustre_cfg *lcfg)
 696 {
 697         struct obd_device *obd;
 698         int err;
 699
 700         LASSERT(lcfg && !IS_ERR(lcfg));
 701         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 702
 703         /* Commands that don't need a device */
 704         switch(lcfg->lcfg_command) {
 705         case LCFG_ATTACH: {
 706                 err = class_attach(lcfg);
 707                 GOTO(out, err);
 708         }
 709         case LCFG_ADD_UUID: {
 710                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 711                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 712                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 713
 714                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 715                 GOTO(out, err);
 716         }
 717         case LCFG_DEL_UUID: {
 718                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 719                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 720                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 721
 722                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 723                 GOTO(out, err);
 724         }
 725         case LCFG_MOUNTOPT: {
 726                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 727                        lustre_cfg_string(lcfg, 1),
 728                        lustre_cfg_string(lcfg, 2),
 729                        lustre_cfg_string(lcfg, 3));
 730                 /* set these mount options somewhere, so ll_fill_super
 731                  * can find them. */
 732                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 733                                         lustre_cfg_string(lcfg, 1),
 734                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 735                                         lustre_cfg_string(lcfg, 2),
 736                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 737                                         lustre_cfg_string(lcfg, 3));
 738                 GOTO(out, err);
 739         }
 740         case LCFG_DEL_MOUNTOPT: {
 741                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 742                        lustre_cfg_string(lcfg, 1));
 743                 class_del_profile(lustre_cfg_string(lcfg, 1));
 744                 GOTO(out, err = 0);
 745         }
 746         case LCFG_SET_TIMEOUT: {
 747                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 748                        obd_timeout, lcfg->lcfg_num);
 749                 obd_timeout = max(lcfg->lcfg_num, 1U);
 750                 GOTO(out, err = 0);
 751         }
 752         case LCFG_SET_UPCALL: {
 753                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 754                 /* COMPAT_146 Don't fail on old configs */
 755                 GOTO(out, err = 0);
 756         }
 757         case LCFG_MARKER: {
 758                 struct cfg_marker *marker;
 759                 marker = lustre_cfg_buf(lcfg, 1);
 760                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 761                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 762                 GOTO(out, err = 0);
 763         }
 764         case LCFG_PARAM: {
 765                 /* llite has no obd */
 766                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 767                                        PARAM_LLITE, 0) == 0) &&
 768                     client_process_config) {
 769                         err = (*client_process_config)(lcfg);
 770                         GOTO(out, err);
 771                 }
 772                 /* Fall through */
 773                 break;
 774         }
 775         }
 776
 777         /* Commands that require a device */
 778         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 779         if (obd == NULL) {
 780                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 781                         CERROR("this lcfg command requires a device name\n");
 782                 else
 783                         CERROR("no device for: %s\n",
 784                                lustre_cfg_string(lcfg, 0));
 785
 786                 GOTO(out, err = -EINVAL);
 787         }
 788
 789         switch(lcfg->lcfg_command) {
 790         case LCFG_SETUP: {
 791                 err = class_setup(obd, lcfg);
 792                 GOTO(out, err);
 793         }
 794         case LCFG_DETACH: {
 795                 err = class_detach(obd, lcfg);
 796                 GOTO(out, err = 0);
 797         }
 798         case LCFG_CLEANUP: {
 799                 err = class_cleanup(obd, lcfg);
 800                 GOTO(out, err = 0);
 801         }
 802         case LCFG_ADD_CONN: {
 803                 err = class_add_conn(obd, lcfg);
 804                 GOTO(out, err = 0);
 805         }
 806         case LCFG_DEL_CONN: {
 807                 err = class_del_conn(obd, lcfg);
 808                 GOTO(out, err = 0);
 809         }
 810         default: {
 811                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 812                 GOTO(out, err);
 813
 814         }
 815         }
 816 out:
 817         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 818                 CWARN("Ignoring error %d on optional command %#x\n", err,
 819                       lcfg->lcfg_command);
 820                 err = 0;
 821         }
 822         return err;
 823 }
 824
 825 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 826                              struct lustre_cfg *lcfg, void *data)
 827 {
 828 #ifdef __KERNEL__
 829         struct lprocfs_vars *var;
 830         char *key, *sval;
 831         int i, keylen, vallen;
 832         int matched = 0, j = 0;
 833         int rc = 0;
 834         ENTRY;
 835
 836         if (lcfg->lcfg_command != LCFG_PARAM) {
 837                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 838                 RETURN(-EINVAL);
 839         }
 840
 841         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 842            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 843            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 844         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 845                 key = lustre_cfg_buf(lcfg, i);
 846                 /* Strip off prefix */
 847                 class_match_param(key, prefix, &key);
 848                 sval = strchr(key, '=');
 849                 if (!sval || (*(sval + 1) == 0)) {
 850                         CERROR("Can't parse param %s\n", key);
 851                         rc = -EINVAL;
 852                         /* continue parsing other params */
 853                         continue;
 854                 }
 855                 keylen = sval - key;
 856                 sval++;
 857                 vallen = strlen(sval);
 858                 matched = 0;
 859                 j = 0;
 860                 /* Search proc entries */
 861                 while (lvars[j].name) {
 862                         var = &lvars[j];
 863                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 864                             keylen == strlen(var->name)) {
 865                                 matched++;
 866                                 rc = -EROFS;
 867                                 if (var->write_fptr) {
 868                                         mm_segment_t oldfs;
 869                                         oldfs = get_fs();
 870                                         set_fs(KERNEL_DS);
 871                                         rc = (var->write_fptr)(NULL, sval,
 872                                                                vallen, data);
 873                                         set_fs(oldfs);
 874                                 }
 875                                 if (rc < 0)
 876                                         CERROR("writing proc entry %s err %d\n",
 877                                                var->name, rc);
 878                                 break;
 879                         }
 880                         j++;
 881                 }
 882                 if (!matched) {
 883                         CERROR("%s: unknown param %s\n",
 884                                (char *)lustre_cfg_string(lcfg, 0), key);
 885                         /* rc = -EINVAL;        continue parsing other params */
 886                 } else {
 887                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
 888                                       (char *)lustre_cfg_string(lcfg, 0),
 889                                       (int)strlen(prefix) - 1, prefix,
 890                                       (int)(sval - key - 1), key, sval);
 891                 }
 892         }
 893
 894         if (rc > 0)
 895                 rc = 0;
 896         RETURN(rc);
 897 #else
 898         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
 899         /* Don't throw config error */
 900         RETURN(0);
 901 #endif
 902 }
 903
 904 int class_config_dump_handler(struct llog_handle * handle,
 905                               struct llog_rec_hdr *rec, void *data);
 906
 907 #ifdef __KERNEL__
 908 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
 909 #else
 910 #define lustre_check_exclusion(a,b)  0
 911 #endif
 912
 913 static int class_config_llog_handler(struct llog_handle * handle,
 914                                      struct llog_rec_hdr *rec, void *data)
 915 {
 916         struct config_llog_instance *clli = data;
 917         int cfg_len = rec->lrh_len;
 918         char *cfg_buf = (char*) (rec + 1);
 919         int rc = 0;
 920         ENTRY;
 921
 922         //class_config_dump_handler(handle, rec, data);
 923
 924         switch (rec->lrh_type) {
 925         case OBD_CFG_REC: {
 926                 struct lustre_cfg *lcfg, *lcfg_new;
 927                 struct lustre_cfg_bufs bufs;
 928                 char *inst_name = NULL;
 929                 int inst_len = 0;
 930                 int inst = 0;
 931
 932                 lcfg = (struct lustre_cfg *)cfg_buf;
 933                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION))
 934                         lustre_swab_lustre_cfg(lcfg);
 935
 936                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
 937                 if (rc)
 938                         GOTO(out, rc);
 939
 940                 /* Figure out config state info */
 941                 if (lcfg->lcfg_command == LCFG_MARKER) {
 942                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
 943                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
 944                                clli->cfg_flags, marker->cm_flags);
 945                         if (marker->cm_flags & CM_START) {
 946                                 /* all previous flags off */
 947                                 clli->cfg_flags = CFG_F_MARKER;
 948                                 if (marker->cm_flags & CM_SKIP) {
 949                                         clli->cfg_flags |= CFG_F_SKIP;
 950                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
 951                                                marker->cm_step);
 952                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
 953                                            lustre_check_exclusion(clli->cfg_sb,
 954                                                           marker->cm_tgtname)) {
 955                                         clli->cfg_flags |= CFG_F_EXCLUDE;
 956                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
 957                                                marker->cm_step);
 958                                 }
 959                         } else if (marker->cm_flags & CM_END) {
 960                                 clli->cfg_flags = 0;
 961                         }
 962                 }
 963                 /* A config command without a start marker before it is
 964                    illegal (post 146) */
 965                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
 966                     !(clli->cfg_flags & CFG_F_MARKER) &&
 967                     (lcfg->lcfg_command != LCFG_MARKER)) {
 968                         CWARN("Config not inside markers, ignoring! "
 969                               "(inst: %s, uuid: %s, flags: %#x)\n",
 970                               clli->cfg_instance ? clli->cfg_instance : "<null>",
 971                               clli->cfg_uuid.uuid, clli->cfg_flags);
 972                         clli->cfg_flags |= CFG_F_SKIP;
 973                 }
 974                 if (clli->cfg_flags & CFG_F_SKIP) {
 975                         CDEBUG(D_CONFIG, "skipping %#x\n",
 976                                clli->cfg_flags);
 977                         rc = 0;
 978                         /* No processing! */
 979                         break;
 980                 }
 981
 982                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
 983                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
 984                         /* Add inactive instead */
 985                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
 986
 987                 lustre_cfg_bufs_init(&bufs, lcfg);
 988
 989                 if (clli && clli->cfg_instance &&
 990                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
 991                         inst = 1;
 992                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
 993                                 strlen(clli->cfg_instance) + 1;
 994                         OBD_ALLOC(inst_name, inst_len);
 995                         if (inst_name == NULL)
 996                                 GOTO(out, rc = -ENOMEM);
 997                         sprintf(inst_name, "%s-%s",
 998                                 lustre_cfg_string(lcfg, 0),
 999                                 clli->cfg_instance);
1000                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1001                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1002                                lcfg->lcfg_command, inst_name);
1003                 }
1004
1005                 /* we override the llog's uuid for clients, to insure they
1006                 are unique */
1007                 if (clli && clli->cfg_instance &&
1008                     lcfg->lcfg_command == LCFG_ATTACH) {
1009                         lustre_cfg_bufs_set_string(&bufs, 2,
1010                                                    clli->cfg_uuid.uuid);
1011                 }
1012
1013                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1014
1015                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1016                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1017
1018                 /* XXX Hack to try to remain binary compatible with
1019                  * pre-newconfig logs */
1020                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1021                     (lcfg->lcfg_nid >> 32) == 0) {
1022                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1023
1024                         lcfg_new->lcfg_nid =
1025                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1026                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1027                               lcfg->lcfg_nal, addr,
1028                               libcfs_nid2str(lcfg_new->lcfg_nid));
1029                 } else {
1030                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1031                 }
1032
1033                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1034
1035                 rc = class_process_config(lcfg_new);
1036                 lustre_cfg_free(lcfg_new);
1037
1038                 if (inst)
1039                         OBD_FREE(inst_name, inst_len);
1040                 break;
1041         }
1042         default:
1043                 CERROR("Unknown llog record type %#x encountered\n",
1044                        rec->lrh_type);
1045                 break;
1046         }
1047 out:
1048         if (rc) {
1049                 CERROR("Err %d on cfg command:\n", rc);
1050                 class_config_dump_handler(handle, rec, data);
1051         }
1052         RETURN(rc);
1053 }
1054
1055 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1056                             struct config_llog_instance *cfg)
1057 {
1058         struct llog_process_cat_data cd = {0, 0};
1059         struct llog_handle *llh;
1060         int rc, rc2;
1061         ENTRY;
1062
1063         CDEBUG(D_INFO, "looking up llog %s\n", name);
1064         rc = llog_create(ctxt, &llh, NULL, name);
1065         if (rc)
1066                 RETURN(rc);
1067
1068         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1069         if (rc)
1070                 GOTO(parse_out, rc);
1071
1072         /* continue processing from where we last stopped to end-of-log */
1073         if (cfg)
1074                 cd.first_idx = cfg->cfg_last_idx;
1075         cd.last_idx = 0;
1076
1077         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1078
1079         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1080                cd.first_idx + 1, cd.last_idx, rc);
1081
1082         if (cfg)
1083                 cfg->cfg_last_idx = cd.last_idx;
1084
1085 parse_out:
1086         rc2 = llog_close(llh);
1087         if (rc == 0)
1088                 rc = rc2;
1089
1090         RETURN(rc);
1091 }
1092
1093 int class_config_dump_handler(struct llog_handle * handle,
1094                               struct llog_rec_hdr *rec, void *data)
1095 {
1096         int cfg_len = rec->lrh_len;
1097         char *cfg_buf = (char*) (rec + 1);
1098         char *outstr, *ptr, *end;
1099         int rc = 0;
1100         ENTRY;
1101
1102         OBD_ALLOC(outstr, 256);
1103         end = outstr + 256;
1104         ptr = outstr;
1105         if (!outstr) {
1106                 RETURN(-ENOMEM);
1107         }
1108         if (rec->lrh_type == OBD_CFG_REC) {
1109                 struct lustre_cfg *lcfg;
1110                 int i;
1111
1112                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1113                 if (rc)
1114                         GOTO(out, rc);
1115                 lcfg = (struct lustre_cfg *)cfg_buf;
1116
1117                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1118                                 lcfg->lcfg_command);
1119                 if (lcfg->lcfg_flags) {
1120                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1121                                         lcfg->lcfg_flags);
1122                 }
1123                 if (lcfg->lcfg_num) {
1124                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1125                                         lcfg->lcfg_num);
1126                 }
1127                 if (lcfg->lcfg_nid) {
1128                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1129                                         libcfs_nid2str(lcfg->lcfg_nid),
1130                                         lcfg->lcfg_nid);
1131                 }
1132                 if (lcfg->lcfg_command == LCFG_MARKER) {
1133                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1134                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1135                                         marker->cm_step, marker->cm_flags,
1136                                         marker->cm_tgtname, marker->cm_comment);
1137                 } else {
1138                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1139                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1140                                                 lustre_cfg_string(lcfg, i));
1141                         }
1142                 }
1143                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1144         } else {
1145                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1146                 rc = -EINVAL;
1147         }
1148 out:
1149         OBD_FREE(outstr, 256);
1150         RETURN(rc);
1151 }
1152
1153 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1154                            struct config_llog_instance *cfg)
1155 {
1156         struct llog_handle *llh;
1157         int rc, rc2;
1158         ENTRY;
1159
1160         LCONSOLE_INFO("Dumping config log %s\n", name);
1161
1162         rc = llog_create(ctxt, &llh, NULL, name);
1163         if (rc)
1164                 RETURN(rc);
1165
1166         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1167         if (rc)
1168                 GOTO(parse_out, rc);
1169
1170         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1171 parse_out:
1172         rc2 = llog_close(llh);
1173         if (rc == 0)
1174                 rc = rc2;
1175
1176         LCONSOLE_INFO("End config log %s\n", name);
1177         RETURN(rc);
1178
1179 }
1180
1181 /* Cleanup and detach */
1182 int class_manual_cleanup(struct obd_device *obd)
1183 {
1184         struct lustre_cfg *lcfg;
1185         struct lustre_cfg_bufs bufs;
1186         int rc;
1187         char flags[3]="";
1188         ENTRY;
1189
1190         if (!obd) {
1191                 CERROR("empty cleanup\n");
1192                 RETURN(-EALREADY);
1193         }
1194
1195         if (obd->obd_force)
1196                 strcat(flags, "F");
1197         if (obd->obd_fail)
1198                 strcat(flags, "A");
1199
1200         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1201                obd->obd_name, flags);
1202
1203         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1204         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1205         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1206
1207         rc = class_process_config(lcfg);
1208         if (rc) {
1209                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1210                 GOTO(out, rc);
1211         }
1212
1213         /* the lcfg is almost the same for both ops */
1214         lcfg->lcfg_command = LCFG_DETACH;
1215         rc = class_process_config(lcfg);
1216         if (rc)
1217                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1218 out:
1219         lustre_cfg_free(lcfg);
1220         RETURN(rc);
1221 }
1222