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         spin_lock_init(&obd->obd_uncommitted_replies_lock);
 192         CFS_INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
 193
 194         len = strlen(uuid);
 195         if (len >= sizeof(obd->obd_uuid)) {
 196                 CERROR("uuid must be < "LPSZ" bytes long\n",
 197                        sizeof(obd->obd_uuid));
 198                 GOTO(out, rc = -EINVAL);
 199         }
 200         memcpy(obd->obd_uuid.uuid, uuid, len);
 201
 202         /* do the attach */
 203         if (OBP(obd, attach)) {
 204                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 205                 if (rc)
 206                         GOTO(out, rc = -EINVAL);
 207         }
 208
 209         /* Detach drops this */
 210         spin_lock(&obd->obd_dev_lock);
 211         atomic_set(&obd->obd_refcount, 1);
 212         spin_unlock(&obd->obd_dev_lock);
 213
 214         obd->obd_attached = 1;
 215         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 216                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 217         RETURN(0);
 218  out:
 219         if (obd != NULL) {
 220                 class_release_dev(obd);
 221         }
 222         return rc;
 223 }
 224
 225 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 226 {
 227         int err = 0;
 228         struct obd_export *exp;
 229         ENTRY;
 230
 231         LASSERT(obd != NULL);
 232         LASSERTF(obd == class_num2obd(obd->obd_minor), "obd %p != obd_devs[%d] %p\n",
 233                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 234         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n",
 235                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 236
 237         /* have we attached a type to this device? */
 238         if (!obd->obd_attached) {
 239                 CERROR("Device %d not attached\n", obd->obd_minor);
 240                 RETURN(-ENODEV);
 241         }
 242
 243         if (obd->obd_set_up) {
 244                 CERROR("Device %d already setup (type %s)\n",
 245                        obd->obd_minor, obd->obd_type->typ_name);
 246                 RETURN(-EEXIST);
 247         }
 248
 249         /* is someone else setting us up right now? (attach inits spinlock) */
 250         spin_lock(&obd->obd_dev_lock);
 251         if (obd->obd_starting) {
 252                 spin_unlock(&obd->obd_dev_lock);
 253                 CERROR("Device %d setup in progress (type %s)\n",
 254                        obd->obd_minor, obd->obd_type->typ_name);
 255                 RETURN(-EEXIST);
 256         }
 257         /* just leave this on forever.  I can't use obd_set_up here because
 258            other fns check that status, and we're not actually set up yet. */
 259         obd->obd_starting = 1;
 260         spin_unlock(&obd->obd_dev_lock);
 261
 262         /* create an uuid-export hash body */
 263         err = lustre_hash_init(&obd->obd_uuid_hash_body, "UUID_HASH",
 264                                128, &uuid_hash_operations);
 265         if (err) {
 266                 GOTO(err_hash, err);
 267         }
 268
 269         /* create a nid-export hash body */
 270         err = lustre_hash_init(&obd->obd_nid_hash_body, "NID_HASH",
 271                                128, &nid_hash_operations);
 272         if (err)
 273                 GOTO(err_hash, err);
 274
 275         exp = class_new_export(obd, &obd->obd_uuid);
 276         if (IS_ERR(exp))
 277                 RETURN(PTR_ERR(exp));
 278         obd->obd_self_export = exp;
 279         list_del_init(&exp->exp_obd_chain_timed);
 280         class_export_put(exp);
 281
 282         err = obd_setup(obd, lcfg);
 283         if (err)
 284                 GOTO(err_exp, err);
 285
 286         obd->obd_set_up = 1;
 287
 288         spin_lock(&obd->obd_dev_lock);
 289         /* cleanup drops this */
 290         class_incref(obd);
 291         spin_unlock(&obd->obd_dev_lock);
 292
 293         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 294                obd->obd_name, obd->obd_uuid.uuid);
 295
 296         RETURN(0);
 297
 298 err_exp:
 299         class_unlink_export(obd->obd_self_export);
 300         obd->obd_self_export = NULL;
 301 err_hash:
 302         lustre_hash_exit(&obd->obd_uuid_hash_body);
 303         lustre_hash_exit(&obd->obd_nid_hash_body);
 304         obd->obd_starting = 0;
 305         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 306         RETURN(err);
 307 }
 308
 309 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 310 {
 311         ENTRY;
 312
 313         if (obd->obd_set_up) {
 314                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 315                 RETURN(-EBUSY);
 316         }
 317
 318         spin_lock(&obd->obd_dev_lock);
 319         if (!obd->obd_attached) {
 320                 spin_unlock(&obd->obd_dev_lock);
 321                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 322                 RETURN(-ENODEV);
 323         }
 324         obd->obd_attached = 0;
 325         spin_unlock(&obd->obd_dev_lock);
 326
 327         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 328                obd->obd_name, obd->obd_uuid.uuid);
 329
 330         class_decref(obd);
 331
 332         /* not strictly necessary, but cleans up eagerly */
 333         obd_zombie_impexp_cull();
 334
 335         RETURN(0);
 336 }
 337
 338 static void dump_exports(struct obd_device *obd)
 339 {
 340         struct obd_export *exp, *n;
 341
 342         list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
 343                 struct ptlrpc_reply_state *rs;
 344                 struct ptlrpc_reply_state *first_reply = NULL;
 345                 int                        nreplies = 0;
 346
 347                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 348                                      rs_exp_list) {
 349                         if (nreplies == 0)
 350                                 first_reply = rs;
 351                         nreplies++;
 352                 }
 353
 354                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 355                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 356                        obd_export_nid2str(exp),
 357                        atomic_read(&exp->exp_refcount),
 358                        exp->exp_failed, nreplies, first_reply,
 359                        nreplies > 3 ? "..." : "");
 360         }
 361 }
 362
 363 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 364 {
 365         int err = 0;
 366         char *flag;
 367         ENTRY;
 368
 369         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 370
 371         if (!obd->obd_set_up) {
 372                 CERROR("Device %d not setup\n", obd->obd_minor);
 373                 RETURN(-ENODEV);
 374         }
 375
 376         spin_lock(&obd->obd_dev_lock);
 377         if (obd->obd_stopping) {
 378                 spin_unlock(&obd->obd_dev_lock);
 379                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 380                 RETURN(-ENODEV);
 381         }
 382         /* Leave this on forever */
 383         obd->obd_stopping = 1;
 384         spin_unlock(&obd->obd_dev_lock);
 385
 386         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 387                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 388                         switch (*flag) {
 389                         case 'F':
 390                                 obd->obd_force = 1;
 391                                 break;
 392                         case 'A':
 393                                 LCONSOLE_WARN("Failing over %s\n",
 394                                               obd->obd_name);
 395                                 obd->obd_fail = 1;
 396                                 obd->obd_no_transno = 1;
 397                                 obd->obd_no_recov = 1;
 398                                 /* Set the obd readonly if we can */
 399                                 if (OBP(obd, iocontrol))
 400                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 401                                                       obd->obd_self_export,
 402                                                       0, NULL, NULL);
 403                                 break;
 404                         default:
 405                                 CERROR("unrecognised flag '%c'\n",
 406                                        *flag);
 407                         }
 408         }
 409
 410         /* The three references that should be remaining are the
 411          * obd_self_export and the attach and setup references. */
 412         if (atomic_read(&obd->obd_refcount) > 3) {
 413 #if 0           /* We should never fail to cleanup with mountconf */
 414                 if (!(obd->obd_fail || obd->obd_force)) {
 415                         CERROR("OBD %s is still busy with %d references\n"
 416                                "You should stop active file system users,"
 417                                " or use the --force option to cleanup.\n",
 418                                obd->obd_name, atomic_read(&obd->obd_refcount));
 419                         dump_exports(obd);
 420                         /* Allow a failed cleanup to try again. */
 421                         obd->obd_stopping = 0;
 422                 }
 423 #endif
 424                 /* refcounf - 3 might be the number of real exports
 425                    (excluding self export). But class_incref is called
 426                    by other things as well, so don't count on it. */
 427                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 428                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 429                 dump_exports(obd);
 430                 class_disconnect_exports(obd);
 431         }
 432         LASSERT(obd->obd_self_export);
 433
 434         /* destroy an uuid-export hash body */
 435         lustre_hash_exit(&obd->obd_uuid_hash_body);
 436
 437         /* destroy a nid-export hash body */
 438         lustre_hash_exit(&obd->obd_nid_hash_body);
 439
 440         /* Precleanup stage 1, we must make sure all exports (other than the
 441            self-export) get destroyed. */
 442         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 443         if (err)
 444                 CERROR("Precleanup %s returned %d\n",
 445                        obd->obd_name, err);
 446
 447         class_decref(obd);
 448         obd->obd_set_up = 0;
 449         RETURN(0);
 450 }
 451
 452 struct obd_device *class_incref(struct obd_device *obd)
 453 {
 454         atomic_inc(&obd->obd_refcount);
 455         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 456                atomic_read(&obd->obd_refcount));
 457
 458         return obd;
 459 }
 460
 461 void class_decref(struct obd_device *obd)
 462 {
 463         int err;
 464         int refs;
 465
 466         spin_lock(&obd->obd_dev_lock);
 467         atomic_dec(&obd->obd_refcount);
 468         refs = atomic_read(&obd->obd_refcount);
 469         spin_unlock(&obd->obd_dev_lock);
 470
 471         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 472
 473         if ((refs == 1) && obd->obd_stopping) {
 474                 /* All exports (other than the self-export) have been
 475                    destroyed; there should be no more in-progress ops
 476                    by this point.*/
 477                 /* if we're not stopping, we didn't finish setup */
 478                 /* Precleanup stage 2,  do other type-specific
 479                    cleanup requiring the self-export. */
 480                 err = obd_precleanup(obd, OBD_CLEANUP_SELF_EXP);
 481                 if (err)
 482                         CERROR("Precleanup %s returned %d\n",
 483                                obd->obd_name, err);
 484
 485                 spin_lock(&obd->obd_self_export->exp_lock);
 486                 obd->obd_self_export->exp_flags |=
 487                         (obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 488                         (obd->obd_force ? OBD_OPT_FORCE : 0);
 489                 spin_unlock(&obd->obd_self_export->exp_lock);
 490
 491                 /* note that we'll recurse into class_decref again */
 492                 class_unlink_export(obd->obd_self_export);
 493                 return;
 494         }
 495
 496         if (refs == 0) {
 497                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 498                        obd->obd_name, obd->obd_uuid.uuid);
 499                 LASSERT(!obd->obd_attached);
 500                 if (obd->obd_stopping) {
 501                         /* If we're not stopping, we were never set up */
 502                         err = obd_cleanup(obd);
 503                         if (err)
 504                                 CERROR("Cleanup %s returned %d\n",
 505                                        obd->obd_name, err);
 506                 }
 507                 if (OBP(obd, detach)) {
 508                         err = OBP(obd,detach)(obd);
 509                         if (err)
 510                                 CERROR("Detach returned %d\n", err);
 511                 }
 512                 class_release_dev(obd);
 513         }
 514 }
 515
 516 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 517 {
 518         struct obd_import *imp;
 519         struct obd_uuid uuid;
 520         int rc;
 521         ENTRY;
 522
 523         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 524             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 525                 CERROR("invalid conn_uuid\n");
 526                 RETURN(-EINVAL);
 527         }
 528         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 529             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 530             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 531                 CERROR("can't add connection on non-client dev\n");
 532                 RETURN(-EINVAL);
 533         }
 534
 535         imp = obd->u.cli.cl_import;
 536         if (!imp) {
 537                 CERROR("try to add conn on immature client dev\n");
 538                 RETURN(-EINVAL);
 539         }
 540
 541         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 542         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 543
 544         RETURN(rc);
 545 }
 546
 547 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 548 {
 549         struct obd_import *imp;
 550         struct obd_uuid uuid;
 551         int rc;
 552         ENTRY;
 553
 554         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 555             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 556                 CERROR("invalid conn_uuid\n");
 557                 RETURN(-EINVAL);
 558         }
 559         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 560             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 561                 CERROR("can't del connection on non-client dev\n");
 562                 RETURN(-EINVAL);
 563         }
 564
 565         imp = obd->u.cli.cl_import;
 566         if (!imp) {
 567                 CERROR("try to del conn on immature client dev\n");
 568                 RETURN(-EINVAL);
 569         }
 570
 571         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 572         rc = obd_del_conn(imp, &uuid);
 573
 574         RETURN(rc);
 575 }
 576
 577 int class_sec_flavor(struct obd_device *obd, struct lustre_cfg *lcfg)
 578 {
 579         struct sec_flavor_config *conf;
 580         ENTRY;
 581
 582         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 583             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 584                 CERROR("Can't set security flavor on obd %s\n",
 585                        obd->obd_type->typ_name);
 586                 RETURN(-EINVAL);
 587         }
 588
 589         if (LUSTRE_CFG_BUFLEN(lcfg, 1) != sizeof(*conf)) {
 590                 CERROR("invalid data\n");
 591                 RETURN(-EINVAL);
 592         }
 593
 594         conf = &obd->u.cli.cl_sec_conf;
 595         memcpy(conf, lustre_cfg_buf(lcfg, 1), sizeof(*conf));
 596
 597 #ifdef __BIG_ENDIAN
 598         __swab32s(&conf->sfc_rpc_flavor);
 599         __swab32s(&conf->sfc_bulk_csum);
 600         __swab32s(&conf->sfc_bulk_priv);
 601         __swab32s(&conf->sfc_flags);
 602 #endif
 603
 604         RETURN(0);
 605 }
 606
 607 CFS_LIST_HEAD(lustre_profile_list);
 608
 609 struct lustre_profile *class_get_profile(const char * prof)
 610 {
 611         struct lustre_profile *lprof;
 612
 613         ENTRY;
 614         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 615                 if (!strcmp(lprof->lp_profile, prof)) {
 616                         RETURN(lprof);
 617                 }
 618         }
 619         RETURN(NULL);
 620 }
 621
 622 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 623                       int mdclen, char *mdc)
 624 {
 625         struct lustre_profile *lprof;
 626         int err = 0;
 627         ENTRY;
 628
 629         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 630
 631         OBD_ALLOC(lprof, sizeof(*lprof));
 632         if (lprof == NULL)
 633                 RETURN(-ENOMEM);
 634         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 635
 636         LASSERT(proflen == (strlen(prof) + 1));
 637         OBD_ALLOC(lprof->lp_profile, proflen);
 638         if (lprof->lp_profile == NULL)
 639                 GOTO(out, err = -ENOMEM);
 640         memcpy(lprof->lp_profile, prof, proflen);
 641
 642         LASSERT(osclen == (strlen(osc) + 1));
 643         OBD_ALLOC(lprof->lp_dt, osclen);
 644         if (lprof->lp_dt == NULL)
 645                 GOTO(out, err = -ENOMEM);
 646         memcpy(lprof->lp_dt, osc, osclen);
 647
 648         if (mdclen > 0) {
 649                 LASSERT(mdclen == (strlen(mdc) + 1));
 650                 OBD_ALLOC(lprof->lp_md, mdclen);
 651                 if (lprof->lp_md == NULL)
 652                         GOTO(out, err = -ENOMEM);
 653                 memcpy(lprof->lp_md, mdc, mdclen);
 654         }
 655
 656         list_add(&lprof->lp_list, &lustre_profile_list);
 657         RETURN(err);
 658
 659 out:
 660         if (lprof->lp_md)
 661                 OBD_FREE(lprof->lp_md, mdclen);
 662         if (lprof->lp_dt)
 663                 OBD_FREE(lprof->lp_dt, osclen);
 664         if (lprof->lp_profile)
 665                 OBD_FREE(lprof->lp_profile, proflen);
 666         OBD_FREE(lprof, sizeof(*lprof));
 667         RETURN(err);
 668 }
 669
 670 void class_del_profile(const char *prof)
 671 {
 672         struct lustre_profile *lprof;
 673         ENTRY;
 674
 675         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 676
 677         lprof = class_get_profile(prof);
 678         if (lprof) {
 679                 list_del(&lprof->lp_list);
 680                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 681                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 682                 if (lprof->lp_md)
 683                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 684                 OBD_FREE(lprof, sizeof *lprof);
 685         }
 686         EXIT;
 687 }
 688
 689 /* COMPAT_146 */
 690 void class_del_profiles(void)
 691 {
 692         struct lustre_profile *lprof, *n;
 693         ENTRY;
 694
 695         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 696                 list_del(&lprof->lp_list);
 697                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 698                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 699                 if (lprof->lp_md)
 700                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 701                 OBD_FREE(lprof, sizeof *lprof);
 702         }
 703         EXIT;
 704 }
 705
 706 /* We can't call ll_process_config directly because it lives in a module that
 707    must be loaded after this one. */
 708 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 709
 710 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 711 {
 712         client_process_config = cpc;
 713 }
 714 EXPORT_SYMBOL(lustre_register_client_process_config);
 715
 716 int class_process_config(struct lustre_cfg *lcfg)
 717 {
 718         struct obd_device *obd;
 719         int err;
 720
 721         LASSERT(lcfg && !IS_ERR(lcfg));
 722         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 723
 724         /* Commands that don't need a device */
 725         switch(lcfg->lcfg_command) {
 726         case LCFG_ATTACH: {
 727                 err = class_attach(lcfg);
 728                 GOTO(out, err);
 729         }
 730         case LCFG_ADD_UUID: {
 731                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 732                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 733                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 734
 735                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 736                 GOTO(out, err);
 737         }
 738         case LCFG_DEL_UUID: {
 739                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 740                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 741                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 742
 743                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 744                 GOTO(out, err);
 745         }
 746         case LCFG_MOUNTOPT: {
 747                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 748                        lustre_cfg_string(lcfg, 1),
 749                        lustre_cfg_string(lcfg, 2),
 750                        lustre_cfg_string(lcfg, 3));
 751                 /* set these mount options somewhere, so ll_fill_super
 752                  * can find them. */
 753                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 754                                         lustre_cfg_string(lcfg, 1),
 755                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 756                                         lustre_cfg_string(lcfg, 2),
 757                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 758                                         lustre_cfg_string(lcfg, 3));
 759                 GOTO(out, err);
 760         }
 761         case LCFG_DEL_MOUNTOPT: {
 762                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 763                        lustre_cfg_string(lcfg, 1));
 764                 class_del_profile(lustre_cfg_string(lcfg, 1));
 765                 GOTO(out, err = 0);
 766         }
 767         case LCFG_SET_TIMEOUT: {
 768                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 769                        obd_timeout, lcfg->lcfg_num);
 770                 obd_timeout = max(lcfg->lcfg_num, 1U);
 771                 obd_health_check_timeout = HEALTH_CHECK_TIMEOUT;
 772                 GOTO(out, err = 0);
 773         }
 774         case LCFG_SET_UPCALL: {
 775                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 776                 /* COMPAT_146 Don't fail on old configs */
 777                 GOTO(out, err = 0);
 778         }
 779         case LCFG_MARKER: {
 780                 struct cfg_marker *marker;
 781                 marker = lustre_cfg_buf(lcfg, 1);
 782                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 783                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 784                 GOTO(out, err = 0);
 785         }
 786         case LCFG_PARAM: {
 787                 /* llite has no obd */
 788                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 789                                        PARAM_LLITE, 0) == 0) &&
 790                     client_process_config) {
 791                         err = (*client_process_config)(lcfg);
 792                         GOTO(out, err);
 793                 }
 794                 /* Fall through */
 795                 break;
 796         }
 797         }
 798
 799         /* Commands that require a device */
 800         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 801         if (obd == NULL) {
 802                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 803                         CERROR("this lcfg command requires a device name\n");
 804                 else
 805                         CERROR("no device for: %s\n",
 806                                lustre_cfg_string(lcfg, 0));
 807
 808                 GOTO(out, err = -EINVAL);
 809         }
 810
 811         switch(lcfg->lcfg_command) {
 812         case LCFG_SETUP: {
 813                 err = class_setup(obd, lcfg);
 814                 GOTO(out, err);
 815         }
 816         case LCFG_DETACH: {
 817                 err = class_detach(obd, lcfg);
 818                 GOTO(out, err = 0);
 819         }
 820         case LCFG_CLEANUP: {
 821                 err = class_cleanup(obd, lcfg);
 822                 GOTO(out, err = 0);
 823         }
 824         case LCFG_ADD_CONN: {
 825                 err = class_add_conn(obd, lcfg);
 826                 GOTO(out, err = 0);
 827         }
 828         case LCFG_DEL_CONN: {
 829                 err = class_del_conn(obd, lcfg);
 830                 GOTO(out, err = 0);
 831         }
 832         case LCFG_SEC_FLAVOR: {
 833                 err = class_sec_flavor(obd, lcfg);
 834                 GOTO(out, err = 0);
 835         }
 836         default: {
 837                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 838                 GOTO(out, err);
 839
 840         }
 841         }
 842 out:
 843         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 844                 CWARN("Ignoring error %d on optional command %#x\n", err,
 845                       lcfg->lcfg_command);
 846                 err = 0;
 847         }
 848         return err;
 849 }
 850
 851 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 852                              struct lustre_cfg *lcfg, void *data)
 853 {
 854 #ifdef __KERNEL__
 855         struct lprocfs_vars *var;
 856         char *key, *sval;
 857         int i, keylen, vallen;
 858         int matched = 0, j = 0;
 859         int rc = 0;
 860         ENTRY;
 861
 862         if (lcfg->lcfg_command != LCFG_PARAM) {
 863                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 864                 RETURN(-EINVAL);
 865         }
 866
 867         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 868            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 869            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 870         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 871                 key = lustre_cfg_buf(lcfg, i);
 872                 /* Strip off prefix */
 873                 class_match_param(key, prefix, &key);
 874                 sval = strchr(key, '=');
 875                 if (!sval || (*(sval + 1) == 0)) {
 876                         CERROR("Can't parse param %s\n", key);
 877                         rc = -EINVAL;
 878                         /* continue parsing other params */
 879                         continue;
 880                 }
 881                 keylen = sval - key;
 882                 sval++;
 883                 vallen = strlen(sval);
 884                 matched = 0;
 885                 j = 0;
 886                 /* Search proc entries */
 887                 while (lvars[j].name) {
 888                         var = &lvars[j];
 889                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 890                             keylen == strlen(var->name)) {
 891                                 matched++;
 892                                 rc = -EROFS;
 893                                 if (var->write_fptr) {
 894                                         mm_segment_t oldfs;
 895                                         oldfs = get_fs();
 896                                         set_fs(KERNEL_DS);
 897                                         rc = (var->write_fptr)(NULL, sval,
 898                                                                vallen, data);
 899                                         set_fs(oldfs);
 900                                 }
 901                                 if (rc < 0)
 902                                         CERROR("writing proc entry %s err %d\n",
 903                                                var->name, rc);
 904                                 break;
 905                         }
 906                         j++;
 907                 }
 908                 if (!matched) {
 909                         CERROR("%s: unknown param %s\n",
 910                                (char *)lustre_cfg_string(lcfg, 0), key);
 911                         rc = -EINVAL;
 912                         /* continue parsing other params */
 913                 } else {
 914                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
 915                                       (char *)lustre_cfg_string(lcfg, 0),
 916                                       (int)strlen(prefix) - 1, prefix,
 917                                       (int)(sval - key - 1), key, sval);
 918                 }
 919         }
 920
 921         if (rc > 0)
 922                 rc = 0;
 923         RETURN(rc);
 924 #else
 925         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
 926         /* Don't throw config error */
 927         RETURN(0);
 928 #endif
 929 }
 930
 931 int class_config_dump_handler(struct llog_handle * handle,
 932                               struct llog_rec_hdr *rec, void *data);
 933
 934 #ifdef __KERNEL__
 935 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
 936 #else
 937 #define lustre_check_exclusion(a,b)  0
 938 #endif
 939
 940 static int class_config_llog_handler(struct llog_handle * handle,
 941                                      struct llog_rec_hdr *rec, void *data)
 942 {
 943         struct config_llog_instance *clli = data;
 944         int cfg_len = rec->lrh_len;
 945         char *cfg_buf = (char*) (rec + 1);
 946         int rc = 0;
 947         ENTRY;
 948
 949         //class_config_dump_handler(handle, rec, data);
 950
 951         switch (rec->lrh_type) {
 952         case OBD_CFG_REC: {
 953                 struct lustre_cfg *lcfg, *lcfg_new;
 954                 struct lustre_cfg_bufs bufs;
 955                 char *inst_name = NULL;
 956                 int inst_len = 0;
 957                 int inst = 0;
 958
 959                 lcfg = (struct lustre_cfg *)cfg_buf;
 960                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION))
 961                         lustre_swab_lustre_cfg(lcfg);
 962
 963                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
 964                 if (rc)
 965                         GOTO(out, rc);
 966
 967                 /* Figure out config state info */
 968                 if (lcfg->lcfg_command == LCFG_MARKER) {
 969                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
 970                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
 971                                clli->cfg_flags, marker->cm_flags);
 972                         if (marker->cm_flags & CM_START) {
 973                                 /* all previous flags off */
 974                                 clli->cfg_flags = CFG_F_MARKER;
 975                                 if (marker->cm_flags & CM_SKIP) {
 976                                         clli->cfg_flags |= CFG_F_SKIP;
 977                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
 978                                                marker->cm_step);
 979                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
 980                                            lustre_check_exclusion(clli->cfg_sb,
 981                                                           marker->cm_tgtname)) {
 982                                         clli->cfg_flags |= CFG_F_EXCLUDE;
 983                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
 984                                                marker->cm_step);
 985                                 }
 986                         } else if (marker->cm_flags & CM_END) {
 987                                 clli->cfg_flags = 0;
 988                         }
 989                 }
 990                 /* A config command without a start marker before it is
 991                    illegal (post 146) */
 992                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
 993                     !(clli->cfg_flags & CFG_F_MARKER) &&
 994                     (lcfg->lcfg_command != LCFG_MARKER)) {
 995                         CWARN("Config not inside markers, ignoring! "
 996                               "(inst: %s, uuid: %s, flags: %#x)\n",
 997                               clli->cfg_instance ? clli->cfg_instance : "<null>",
 998                               clli->cfg_uuid.uuid, clli->cfg_flags);
 999                         clli->cfg_flags |= CFG_F_SKIP;
1000                 }
1001                 if (clli->cfg_flags & CFG_F_SKIP) {
1002                         CDEBUG(D_CONFIG, "skipping %#x\n",
1003                                clli->cfg_flags);
1004                         rc = 0;
1005                         /* No processing! */
1006                         break;
1007                 }
1008
1009                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1010                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1011                         /* Add inactive instead */
1012                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1013
1014                 lustre_cfg_bufs_init(&bufs, lcfg);
1015
1016                 if (clli && clli->cfg_instance &&
1017                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1018                         inst = 1;
1019                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1020                                 strlen(clli->cfg_instance) + 1;
1021                         OBD_ALLOC(inst_name, inst_len);
1022                         if (inst_name == NULL)
1023                                 GOTO(out, rc = -ENOMEM);
1024                         sprintf(inst_name, "%s-%s",
1025                                 lustre_cfg_string(lcfg, 0),
1026                                 clli->cfg_instance);
1027                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1028                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1029                                lcfg->lcfg_command, inst_name);
1030                 }
1031
1032                 /* we override the llog's uuid for clients, to insure they
1033                 are unique */
1034                 if (clli && clli->cfg_instance &&
1035                     lcfg->lcfg_command == LCFG_ATTACH) {
1036                         lustre_cfg_bufs_set_string(&bufs, 2,
1037                                                    clli->cfg_uuid.uuid);
1038                 }
1039
1040                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1041
1042                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1043                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1044
1045                 /* XXX Hack to try to remain binary compatible with
1046                  * pre-newconfig logs */
1047                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1048                     (lcfg->lcfg_nid >> 32) == 0) {
1049                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1050
1051                         lcfg_new->lcfg_nid =
1052                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1053                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1054                               lcfg->lcfg_nal, addr,
1055                               libcfs_nid2str(lcfg_new->lcfg_nid));
1056                 } else {
1057                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1058                 }
1059
1060                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1061
1062                 rc = class_process_config(lcfg_new);
1063                 lustre_cfg_free(lcfg_new);
1064
1065                 if (inst)
1066                         OBD_FREE(inst_name, inst_len);
1067                 break;
1068         }
1069         default:
1070                 CERROR("Unknown llog record type %#x encountered\n",
1071                        rec->lrh_type);
1072                 break;
1073         }
1074 out:
1075         if (rc) {
1076                 CERROR("Err %d on cfg command:\n", rc);
1077                 class_config_dump_handler(handle, rec, data);
1078         }
1079         RETURN(rc);
1080 }
1081
1082 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1083                             struct config_llog_instance *cfg)
1084 {
1085         struct llog_process_cat_data cd = {0, 0};
1086         struct llog_handle *llh;
1087         int rc, rc2;
1088         ENTRY;
1089
1090         CDEBUG(D_INFO, "looking up llog %s\n", name);
1091         rc = llog_create(ctxt, &llh, NULL, name);
1092         if (rc)
1093                 RETURN(rc);
1094
1095         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1096         if (rc)
1097                 GOTO(parse_out, rc);
1098
1099         /* continue processing from where we last stopped to end-of-log */
1100         if (cfg)
1101                 cd.first_idx = cfg->cfg_last_idx;
1102         cd.last_idx = 0;
1103
1104         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1105
1106         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1107                cd.first_idx + 1, cd.last_idx, rc);
1108
1109         if (cfg)
1110                 cfg->cfg_last_idx = cd.last_idx;
1111
1112 parse_out:
1113         rc2 = llog_close(llh);
1114         if (rc == 0)
1115                 rc = rc2;
1116
1117         RETURN(rc);
1118 }
1119
1120 int class_config_dump_handler(struct llog_handle * handle,
1121                               struct llog_rec_hdr *rec, void *data)
1122 {
1123         int cfg_len = rec->lrh_len;
1124         char *cfg_buf = (char*) (rec + 1);
1125         char *outstr, *ptr, *end;
1126         int rc = 0;
1127         ENTRY;
1128
1129         OBD_ALLOC(outstr, 256);
1130         end = outstr + 256;
1131         ptr = outstr;
1132         if (!outstr) {
1133                 RETURN(-ENOMEM);
1134         }
1135         if (rec->lrh_type == OBD_CFG_REC) {
1136                 struct lustre_cfg *lcfg;
1137                 int i;
1138
1139                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1140                 if (rc)
1141                         GOTO(out, rc);
1142                 lcfg = (struct lustre_cfg *)cfg_buf;
1143
1144                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1145                                 lcfg->lcfg_command);
1146                 if (lcfg->lcfg_flags) {
1147                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1148                                         lcfg->lcfg_flags);
1149                 }
1150                 if (lcfg->lcfg_num) {
1151                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1152                                         lcfg->lcfg_num);
1153                 }
1154                 if (lcfg->lcfg_nid) {
1155                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1156                                         libcfs_nid2str(lcfg->lcfg_nid),
1157                                         lcfg->lcfg_nid);
1158                 }
1159                 if (lcfg->lcfg_command == LCFG_MARKER) {
1160                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1161                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1162                                         marker->cm_step, marker->cm_flags,
1163                                         marker->cm_tgtname, marker->cm_comment);
1164                 } else {
1165                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1166                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1167                                                 lustre_cfg_string(lcfg, i));
1168                         }
1169                 }
1170                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1171         } else {
1172                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1173                 rc = -EINVAL;
1174         }
1175 out:
1176         OBD_FREE(outstr, 256);
1177         RETURN(rc);
1178 }
1179
1180 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1181                            struct config_llog_instance *cfg)
1182 {
1183         struct llog_handle *llh;
1184         int rc, rc2;
1185         ENTRY;
1186
1187         LCONSOLE_INFO("Dumping config log %s\n", name);
1188
1189         rc = llog_create(ctxt, &llh, NULL, name);
1190         if (rc)
1191                 RETURN(rc);
1192
1193         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1194         if (rc)
1195                 GOTO(parse_out, rc);
1196
1197         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1198 parse_out:
1199         rc2 = llog_close(llh);
1200         if (rc == 0)
1201                 rc = rc2;
1202
1203         LCONSOLE_INFO("End config log %s\n", name);
1204         RETURN(rc);
1205
1206 }
1207
1208 /* Cleanup and detach */
1209 int class_manual_cleanup(struct obd_device *obd)
1210 {
1211         struct lustre_cfg *lcfg;
1212         struct lustre_cfg_bufs bufs;
1213         int rc;
1214         char flags[3]="";
1215         ENTRY;
1216
1217         if (!obd) {
1218                 CERROR("empty cleanup\n");
1219                 RETURN(-EALREADY);
1220         }
1221
1222         if (obd->obd_force)
1223                 strcat(flags, "F");
1224         if (obd->obd_fail)
1225                 strcat(flags, "A");
1226
1227         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1228                obd->obd_name, flags);
1229
1230         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1231         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1232         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1233
1234         rc = class_process_config(lcfg);
1235         if (rc) {
1236                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1237                 GOTO(out, rc);
1238         }
1239
1240         /* the lcfg is almost the same for both ops */
1241         lcfg->lcfg_command = LCFG_DETACH;
1242         rc = class_process_config(lcfg);
1243         if (rc)
1244                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1245 out:
1246         lustre_cfg_free(lcfg);
1247         RETURN(rc);
1248 }
1249