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