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  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  *
  36  * lustre/obdclass/obd_config.c
  37  *
  38  * Config API
  39  */
  40
  41 #define DEBUG_SUBSYSTEM S_CLASS
  42 #ifdef __KERNEL__
  43 #include <obd_class.h>
  44 #include <linux/string.h>
  45 #else
  46 #include <liblustre.h>
  47 #include <obd_class.h>
  48 #include <obd.h>
  49 #endif
  50 #include <lustre_log.h>
  51 #include <lprocfs_status.h>
  52 #include <libcfs/list.h>
  53 #include <lustre_param.h>
  54 #include <class_hash.h>
  55
  56 static lustre_hash_ops_t uuid_hash_ops;
  57 static lustre_hash_ops_t nid_hash_ops;
  58 static lustre_hash_ops_t nid_stat_hash_ops;
  59
  60 /*********** string parsing utils *********/
  61
  62 /* returns 0 if we find this key in the buffer, else 1 */
  63 int class_find_param(char *buf, char *key, char **valp)
  64 {
  65         char *ptr;
  66
  67         if (!buf)
  68                 return 1;
  69
  70         if ((ptr = strstr(buf, key)) == NULL)
  71                 return 1;
  72
  73         if (valp)
  74                 *valp = ptr + strlen(key);
  75
  76         return 0;
  77 }
  78
  79 /* returns 0 if this is the first key in the buffer, else 1.
  80    valp points to first char after key. */
  81 int class_match_param(char *buf, char *key, char **valp)
  82 {
  83         if (!buf)
  84                 return 1;
  85
  86         if (memcmp(buf, key, strlen(key)) != 0)
  87                 return 1;
  88
  89         if (valp)
  90                 *valp = buf + strlen(key);
  91
  92         return 0;
  93 }
  94
  95 /* 0 is good nid,
  96    1 not found
  97    < 0 error
  98    endh is set to next separator */
  99 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 100 {
 101         char tmp, *endp;
 102
 103         if (!buf)
 104                 return 1;
 105         while (*buf == ',' || *buf == ':')
 106                 buf++;
 107         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 108                 return 1;
 109
 110         /* nid separators or end of nids */
 111         endp = strpbrk(buf, ",: /");
 112         if (endp == NULL)
 113                 endp = buf + strlen(buf);
 114
 115         tmp = *endp;
 116         *endp = '\0';
 117         *nid = libcfs_str2nid(buf);
 118         if (*nid == LNET_NID_ANY) {
 119                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 120                 *endp = tmp;
 121                 return -EINVAL;
 122         }
 123         *endp = tmp;
 124
 125         if (endh)
 126                 *endh = endp;
 127         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
 128         return 0;
 129 }
 130
 131 EXPORT_SYMBOL(class_find_param);
 132 EXPORT_SYMBOL(class_match_param);
 133 EXPORT_SYMBOL(class_parse_nid);
 134
 135 /********************** class fns **********************/
 136
 137 /**
 138  * Create a new device and set the type, name and uuid.  If successful, the new
 139  * device can be accessed by either name or uuid.
 140  */
 141 int class_attach(struct lustre_cfg *lcfg)
 142 {
 143         struct obd_device *obd = NULL;
 144         char *typename, *name, *uuid;
 145         int rc, len;
 146         ENTRY;
 147
 148         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 149                 CERROR("No type passed!\n");
 150                 RETURN(-EINVAL);
 151         }
 152         typename = lustre_cfg_string(lcfg, 1);
 153
 154         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 155                 CERROR("No name passed!\n");
 156                 RETURN(-EINVAL);
 157         }
 158         name = lustre_cfg_string(lcfg, 0);
 159
 160         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 161                 CERROR("No UUID passed!\n");
 162                 RETURN(-EINVAL);
 163         }
 164         uuid = lustre_cfg_string(lcfg, 2);
 165
 166         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 167                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 168
 169         obd = class_newdev(typename, name);
 170         if (IS_ERR(obd)) {
 171                 /* Already exists or out of obds */
 172                 rc = PTR_ERR(obd);
 173                 obd = NULL;
 174                 CERROR("Cannot create device %s of type %s : %d\n",
 175                        name, typename, rc);
 176                 GOTO(out, rc);
 177         }
 178         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 179                  name, typename);
 180         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 181                  "obd %p obd_magic %08X != %08X\n",
 182                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 183         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0, "%p obd_name %s != %s\n",
 184                  obd, obd->obd_name, name);
 185
 186         rwlock_init(&obd->obd_pool_lock);
 187         obd->obd_pool_limit = 0;
 188         obd->obd_pool_slv = 0;
 189
 190         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 191         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 192         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 193         spin_lock_init(&obd->obd_nid_lock);
 194         spin_lock_init(&obd->obd_dev_lock);
 195         sema_init(&obd->obd_dev_sem, 1);
 196         spin_lock_init(&obd->obd_osfs_lock);
 197         /* obd->obd_osfs_age must be set to a value in the distant
 198          * past to guarantee a fresh statfs is fetched on mount. */
 199         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 200
 201         /* XXX belongs in setup not attach  */
 202         /* recovery data */
 203         cfs_init_timer(&obd->obd_recovery_timer);
 204         spin_lock_init(&obd->obd_processing_task_lock);
 205         cfs_waitq_init(&obd->obd_next_transno_waitq);
 206         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 207         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 208         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 209         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 210
 211         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
 212
 213         spin_lock_init(&obd->obd_uncommitted_replies_lock);
 214         CFS_INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
 215
 216         len = strlen(uuid);
 217         if (len >= sizeof(obd->obd_uuid)) {
 218                 CERROR("uuid must be < %d bytes long\n",
 219                        (int)sizeof(obd->obd_uuid));
 220                 GOTO(out, rc = -EINVAL);
 221         }
 222         memcpy(obd->obd_uuid.uuid, uuid, len);
 223
 224         /* do the attach */
 225         if (OBP(obd, attach)) {
 226                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 227                 if (rc)
 228                         GOTO(out, rc = -EINVAL);
 229         }
 230
 231         /* Detach drops this */
 232         spin_lock(&obd->obd_dev_lock);
 233         atomic_set(&obd->obd_refcount, 1);
 234         spin_unlock(&obd->obd_dev_lock);
 235         lu_ref_init(&obd->obd_reference);
 236         lu_ref_add(&obd->obd_reference, "attach", obd);
 237
 238         obd->obd_attached = 1;
 239         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 240                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 241         RETURN(0);
 242  out:
 243         if (obd != NULL) {
 244                 class_release_dev(obd);
 245         }
 246         return rc;
 247 }
 248
 249 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 250 {
 251         int err = 0;
 252         struct obd_export *exp;
 253         ENTRY;
 254
 255         LASSERT(obd != NULL);
 256         LASSERTF(obd == class_num2obd(obd->obd_minor),
 257                  "obd %p != obd_devs[%d] %p\n",
 258                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 259         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 260                  "obd %p obd_magic %08x != %08x\n",
 261                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 262
 263         /* have we attached a type to this device? */
 264         if (!obd->obd_attached) {
 265                 CERROR("Device %d not attached\n", obd->obd_minor);
 266                 RETURN(-ENODEV);
 267         }
 268
 269         if (obd->obd_set_up) {
 270                 CERROR("Device %d already setup (type %s)\n",
 271                        obd->obd_minor, obd->obd_type->typ_name);
 272                 RETURN(-EEXIST);
 273         }
 274
 275         /* is someone else setting us up right now? (attach inits spinlock) */
 276         spin_lock(&obd->obd_dev_lock);
 277         if (obd->obd_starting) {
 278                 spin_unlock(&obd->obd_dev_lock);
 279                 CERROR("Device %d setup in progress (type %s)\n",
 280                        obd->obd_minor, obd->obd_type->typ_name);
 281                 RETURN(-EEXIST);
 282         }
 283         /* just leave this on forever.  I can't use obd_set_up here because
 284            other fns check that status, and we're not actually set up yet. */
 285         obd->obd_starting = 1;
 286         obd->obd_uuid_hash = NULL;
 287         obd->obd_nid_hash = NULL;
 288         obd->obd_nid_stats_hash = NULL;
 289         spin_unlock(&obd->obd_dev_lock);
 290
 291         /* create an uuid-export lustre hash */
 292         obd->obd_uuid_hash = lustre_hash_init("UUID_HASH", 128, 128,
 293                                               &uuid_hash_ops, 0);
 294         if (!obd->obd_uuid_hash)
 295                 GOTO(err_hash, err = -ENOMEM);
 296
 297         /* create a nid-export lustre hash */
 298         obd->obd_nid_hash = lustre_hash_init("NID_HASH", 128, 128,
 299                                              &nid_hash_ops, 0);
 300         if (!obd->obd_nid_hash)
 301                 GOTO(err_hash, err = -ENOMEM);
 302
 303         /* create a nid-stats lustre hash */
 304         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS", 128, 128,
 305                                                    &nid_stat_hash_ops, 0);
 306         if (!obd->obd_nid_stats_hash)
 307                 GOTO(err_hash, err = -ENOMEM);
 308
 309         exp = class_new_export(obd, &obd->obd_uuid);
 310         if (IS_ERR(exp))
 311                 GOTO(err_hash, err = PTR_ERR(exp));
 312
 313         obd->obd_self_export = exp;
 314         list_del_init(&exp->exp_obd_chain_timed);
 315         class_export_put(exp);
 316
 317         err = obd_setup(obd, lcfg);
 318         if (err)
 319                 GOTO(err_exp, err);
 320
 321         obd->obd_set_up = 1;
 322
 323         spin_lock(&obd->obd_dev_lock);
 324         /* cleanup drops this */
 325         class_incref(obd, "setup", obd);
 326         spin_unlock(&obd->obd_dev_lock);
 327
 328         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 329                obd->obd_name, obd->obd_uuid.uuid);
 330
 331         RETURN(0);
 332 err_exp:
 333         class_unlink_export(obd->obd_self_export);
 334         obd->obd_self_export = NULL;
 335 err_hash:
 336         if (obd->obd_uuid_hash) {
 337                 lustre_hash_exit(obd->obd_uuid_hash);
 338                 obd->obd_uuid_hash = NULL;
 339         }
 340         if (obd->obd_nid_hash) {
 341                 lustre_hash_exit(obd->obd_nid_hash);
 342                 obd->obd_nid_hash = NULL;
 343         }
 344         if (obd->obd_nid_stats_hash) {
 345                 lustre_hash_exit(obd->obd_nid_stats_hash);
 346                 obd->obd_nid_stats_hash = NULL;
 347         }
 348         obd->obd_starting = 0;
 349         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 350         return err;
 351 }
 352
 353 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 354 {
 355         ENTRY;
 356
 357         if (obd->obd_set_up) {
 358                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 359                 RETURN(-EBUSY);
 360         }
 361
 362         spin_lock(&obd->obd_dev_lock);
 363         if (!obd->obd_attached) {
 364                 spin_unlock(&obd->obd_dev_lock);
 365                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 366                 RETURN(-ENODEV);
 367         }
 368         obd->obd_attached = 0;
 369         spin_unlock(&obd->obd_dev_lock);
 370
 371         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 372                obd->obd_name, obd->obd_uuid.uuid);
 373
 374         class_decref(obd, "attach", obd);
 375
 376         /* not strictly necessary, but cleans up eagerly */
 377         obd_zombie_impexp_cull();
 378
 379         RETURN(0);
 380 }
 381
 382 static void dump_exports(struct obd_device *obd)
 383 {
 384         struct obd_export *exp, *n;
 385
 386         list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
 387                 struct ptlrpc_reply_state *rs;
 388                 struct ptlrpc_reply_state *first_reply = NULL;
 389                 int                        nreplies = 0;
 390
 391                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 392                                      rs_exp_list) {
 393                         if (nreplies == 0)
 394                                 first_reply = rs;
 395                         nreplies++;
 396                 }
 397
 398                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 399                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 400                        obd_export_nid2str(exp),
 401                        atomic_read(&exp->exp_refcount),
 402                        exp->exp_failed, nreplies, first_reply,
 403                        nreplies > 3 ? "..." : "");
 404         }
 405 }
 406
 407 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 408 {
 409         int err = 0;
 410         char *flag;
 411         ENTRY;
 412
 413         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 414
 415         if (!obd->obd_set_up) {
 416                 CERROR("Device %d not setup\n", obd->obd_minor);
 417                 RETURN(-ENODEV);
 418         }
 419
 420         spin_lock(&obd->obd_dev_lock);
 421         if (obd->obd_stopping) {
 422                 spin_unlock(&obd->obd_dev_lock);
 423                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 424                 RETURN(-ENODEV);
 425         }
 426         /* Leave this on forever */
 427         obd->obd_stopping = 1;
 428         spin_unlock(&obd->obd_dev_lock);
 429
 430         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 431                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 432                         switch (*flag) {
 433                         case 'F':
 434                                 obd->obd_force = 1;
 435                                 break;
 436                         case 'A':
 437                                 LCONSOLE_WARN("Failing over %s\n",
 438                                               obd->obd_name);
 439                                 obd->obd_fail = 1;
 440                                 obd->obd_no_transno = 1;
 441                                 obd->obd_no_recov = 1;
 442                                 if (OBP(obd, iocontrol)) {
 443                                         obd_iocontrol(OBD_IOC_SYNC,
 444                                                       obd->obd_self_export,
 445                                                       0, NULL, NULL);
 446                                  /* Set the obd readonly if we can */
 447                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 448                                                       obd->obd_self_export,
 449                                                       0, NULL, NULL);
 450                                 }
 451                                 break;
 452                         default:
 453                                 CERROR("unrecognised flag '%c'\n",
 454                                        *flag);
 455                         }
 456         }
 457
 458         /* The three references that should be remaining are the
 459          * obd_self_export and the attach and setup references. */
 460         if (atomic_read(&obd->obd_refcount) > 3) {
 461 #if 0           /* We should never fail to cleanup with mountconf */
 462                 if (!(obd->obd_fail || obd->obd_force)) {
 463                         CERROR("OBD %s is still busy with %d references\n"
 464                                "You should stop active file system users,"
 465                                " or use the --force option to cleanup.\n",
 466                                obd->obd_name, atomic_read(&obd->obd_refcount));
 467                         dump_exports(obd);
 468                         /* Allow a failed cleanup to try again. */
 469                         obd->obd_stopping = 0;
 470                 }
 471 #endif
 472                 /* refcounf - 3 might be the number of real exports
 473                    (excluding self export). But class_incref is called
 474                    by other things as well, so don't count on it. */
 475                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 476                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 477                 dump_exports(obd);
 478                 class_disconnect_exports(obd);
 479         }
 480         LASSERT(obd->obd_self_export);
 481
 482         /* destroy an uuid-export hash body */
 483         lustre_hash_exit(obd->obd_uuid_hash);
 484
 485         /* destroy a nid-export hash body */
 486         lustre_hash_exit(obd->obd_nid_hash);
 487
 488         /* destroy a nid-stats hash body */
 489         lustre_hash_exit(obd->obd_nid_stats_hash);
 490
 491         /* Precleanup, we must make sure all exports get destroyed. */
 492         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 493         if (err)
 494                 CERROR("Precleanup %s returned %d\n",
 495                        obd->obd_name, err);
 496         class_decref(obd, "setup", obd);
 497         obd->obd_set_up = 0;
 498         RETURN(0);
 499 }
 500
 501 struct obd_device *class_incref(struct obd_device *obd,
 502                                 const char *scope, const void *source)
 503 {
 504         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 505         atomic_inc(&obd->obd_refcount);
 506         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 507                atomic_read(&obd->obd_refcount));
 508
 509         return obd;
 510 }
 511
 512 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 513 {
 514         int err;
 515         int refs;
 516
 517         spin_lock(&obd->obd_dev_lock);
 518         atomic_dec(&obd->obd_refcount);
 519         refs = atomic_read(&obd->obd_refcount);
 520         spin_unlock(&obd->obd_dev_lock);
 521         lu_ref_del(&obd->obd_reference, scope, source);
 522
 523         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 524
 525         if ((refs == 1) && obd->obd_stopping) {
 526                 /* All exports have been destroyed; there should
 527                    be no more in-progress ops by this point.*/
 528
 529                 spin_lock(&obd->obd_self_export->exp_lock);
 530                 obd->obd_self_export->exp_flags |=
 531                         (obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 532                         (obd->obd_force ? OBD_OPT_FORCE : 0);
 533                 spin_unlock(&obd->obd_self_export->exp_lock);
 534
 535                 /* note that we'll recurse into class_decref again */
 536                 class_unlink_export(obd->obd_self_export);
 537                 return;
 538         }
 539
 540         if (refs == 0) {
 541                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 542                        obd->obd_name, obd->obd_uuid.uuid);
 543                 LASSERT(!obd->obd_attached);
 544                 if (obd->obd_stopping) {
 545                         /* If we're not stopping, we were never set up */
 546                         err = obd_cleanup(obd);
 547                         if (err)
 548                                 CERROR("Cleanup %s returned %d\n",
 549                                        obd->obd_name, err);
 550                 }
 551                 if (OBP(obd, detach)) {
 552                         err = OBP(obd,detach)(obd);
 553                         if (err)
 554                                 CERROR("Detach returned %d\n", err);
 555                 }
 556                 class_release_dev(obd);
 557         }
 558 }
 559
 560 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 561 {
 562         struct obd_import *imp;
 563         struct obd_uuid uuid;
 564         int rc;
 565         ENTRY;
 566
 567         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 568             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 569                 CERROR("invalid conn_uuid\n");
 570                 RETURN(-EINVAL);
 571         }
 572         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 573             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 574             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 575                 CERROR("can't add connection on non-client dev\n");
 576                 RETURN(-EINVAL);
 577         }
 578
 579         imp = obd->u.cli.cl_import;
 580         if (!imp) {
 581                 CERROR("try to add conn on immature client dev\n");
 582                 RETURN(-EINVAL);
 583         }
 584
 585         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 586         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 587
 588         RETURN(rc);
 589 }
 590
 591 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 592 {
 593         struct obd_import *imp;
 594         struct obd_uuid uuid;
 595         int rc;
 596         ENTRY;
 597
 598         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 599             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 600                 CERROR("invalid conn_uuid\n");
 601                 RETURN(-EINVAL);
 602         }
 603         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 604             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 605                 CERROR("can't del connection on non-client dev\n");
 606                 RETURN(-EINVAL);
 607         }
 608
 609         imp = obd->u.cli.cl_import;
 610         if (!imp) {
 611                 CERROR("try to del conn on immature client dev\n");
 612                 RETURN(-EINVAL);
 613         }
 614
 615         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 616         rc = obd_del_conn(imp, &uuid);
 617
 618         RETURN(rc);
 619 }
 620
 621 CFS_LIST_HEAD(lustre_profile_list);
 622
 623 struct lustre_profile *class_get_profile(const char * prof)
 624 {
 625         struct lustre_profile *lprof;
 626
 627         ENTRY;
 628         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 629                 if (!strcmp(lprof->lp_profile, prof)) {
 630                         RETURN(lprof);
 631                 }
 632         }
 633         RETURN(NULL);
 634 }
 635
 636 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 637                       int mdclen, char *mdc)
 638 {
 639         struct lustre_profile *lprof;
 640         int err = 0;
 641         ENTRY;
 642
 643         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 644
 645         OBD_ALLOC(lprof, sizeof(*lprof));
 646         if (lprof == NULL)
 647                 RETURN(-ENOMEM);
 648         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 649
 650         LASSERT(proflen == (strlen(prof) + 1));
 651         OBD_ALLOC(lprof->lp_profile, proflen);
 652         if (lprof->lp_profile == NULL)
 653                 GOTO(out, err = -ENOMEM);
 654         memcpy(lprof->lp_profile, prof, proflen);
 655
 656         LASSERT(osclen == (strlen(osc) + 1));
 657         OBD_ALLOC(lprof->lp_dt, osclen);
 658         if (lprof->lp_dt == NULL)
 659                 GOTO(out, err = -ENOMEM);
 660         memcpy(lprof->lp_dt, osc, osclen);
 661
 662         if (mdclen > 0) {
 663                 LASSERT(mdclen == (strlen(mdc) + 1));
 664                 OBD_ALLOC(lprof->lp_md, mdclen);
 665                 if (lprof->lp_md == NULL)
 666                         GOTO(out, err = -ENOMEM);
 667                 memcpy(lprof->lp_md, mdc, mdclen);
 668         }
 669
 670         list_add(&lprof->lp_list, &lustre_profile_list);
 671         RETURN(err);
 672
 673 out:
 674         if (lprof->lp_md)
 675                 OBD_FREE(lprof->lp_md, mdclen);
 676         if (lprof->lp_dt)
 677                 OBD_FREE(lprof->lp_dt, osclen);
 678         if (lprof->lp_profile)
 679                 OBD_FREE(lprof->lp_profile, proflen);
 680         OBD_FREE(lprof, sizeof(*lprof));
 681         RETURN(err);
 682 }
 683
 684 void class_del_profile(const char *prof)
 685 {
 686         struct lustre_profile *lprof;
 687         ENTRY;
 688
 689         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 690
 691         lprof = class_get_profile(prof);
 692         if (lprof) {
 693                 list_del(&lprof->lp_list);
 694                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 695                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 696                 if (lprof->lp_md)
 697                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 698                 OBD_FREE(lprof, sizeof *lprof);
 699         }
 700         EXIT;
 701 }
 702
 703 /* COMPAT_146 */
 704 void class_del_profiles(void)
 705 {
 706         struct lustre_profile *lprof, *n;
 707         ENTRY;
 708
 709         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 710                 list_del(&lprof->lp_list);
 711                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 712                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 713                 if (lprof->lp_md)
 714                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 715                 OBD_FREE(lprof, sizeof *lprof);
 716         }
 717         EXIT;
 718 }
 719
 720 /* We can't call ll_process_config directly because it lives in a module that
 721    must be loaded after this one. */
 722 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 723
 724 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 725 {
 726         client_process_config = cpc;
 727 }
 728 EXPORT_SYMBOL(lustre_register_client_process_config);
 729
 730 int class_process_config(struct lustre_cfg *lcfg)
 731 {
 732         struct obd_device *obd;
 733         int err;
 734
 735         LASSERT(lcfg && !IS_ERR(lcfg));
 736         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 737
 738         /* Commands that don't need a device */
 739         switch(lcfg->lcfg_command) {
 740         case LCFG_ATTACH: {
 741                 err = class_attach(lcfg);
 742                 GOTO(out, err);
 743         }
 744         case LCFG_ADD_UUID: {
 745                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 746                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 747                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 748
 749                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 750                 GOTO(out, err);
 751         }
 752         case LCFG_DEL_UUID: {
 753                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 754                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 755                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 756
 757                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 758                 GOTO(out, err);
 759         }
 760         case LCFG_MOUNTOPT: {
 761                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 762                        lustre_cfg_string(lcfg, 1),
 763                        lustre_cfg_string(lcfg, 2),
 764                        lustre_cfg_string(lcfg, 3));
 765                 /* set these mount options somewhere, so ll_fill_super
 766                  * can find them. */
 767                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 768                                         lustre_cfg_string(lcfg, 1),
 769                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 770                                         lustre_cfg_string(lcfg, 2),
 771                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 772                                         lustre_cfg_string(lcfg, 3));
 773                 GOTO(out, err);
 774         }
 775         case LCFG_DEL_MOUNTOPT: {
 776                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 777                        lustre_cfg_string(lcfg, 1));
 778                 class_del_profile(lustre_cfg_string(lcfg, 1));
 779                 GOTO(out, err = 0);
 780         }
 781         case LCFG_SET_TIMEOUT: {
 782                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 783                        obd_timeout, lcfg->lcfg_num);
 784                 obd_timeout = max(lcfg->lcfg_num, 1U);
 785                 GOTO(out, err = 0);
 786         }
 787         case LCFG_SET_UPCALL: {
 788                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 789                 /* COMPAT_146 Don't fail on old configs */
 790                 GOTO(out, err = 0);
 791         }
 792         case LCFG_MARKER: {
 793                 struct cfg_marker *marker;
 794                 marker = lustre_cfg_buf(lcfg, 1);
 795                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 796                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 797                 GOTO(out, err = 0);
 798         }
 799         case LCFG_PARAM: {
 800                 /* llite has no obd */
 801                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 802                                        PARAM_LLITE, 0) == 0) &&
 803                     client_process_config) {
 804                         err = (*client_process_config)(lcfg);
 805                         GOTO(out, err);
 806                 }
 807                 /* Fall through */
 808                 break;
 809         }
 810         }
 811
 812         /* Commands that require a device */
 813         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 814         if (obd == NULL) {
 815                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 816                         CERROR("this lcfg command requires a device name\n");
 817                 else
 818                         CERROR("no device for: %s\n",
 819                                lustre_cfg_string(lcfg, 0));
 820
 821                 GOTO(out, err = -EINVAL);
 822         }
 823
 824         switch(lcfg->lcfg_command) {
 825         case LCFG_SETUP: {
 826                 err = class_setup(obd, lcfg);
 827                 GOTO(out, err);
 828         }
 829         case LCFG_DETACH: {
 830                 err = class_detach(obd, lcfg);
 831                 GOTO(out, err = 0);
 832         }
 833         case LCFG_CLEANUP: {
 834                 err = class_cleanup(obd, lcfg);
 835                 GOTO(out, err = 0);
 836         }
 837         case LCFG_ADD_CONN: {
 838                 err = class_add_conn(obd, lcfg);
 839                 GOTO(out, err = 0);
 840         }
 841         case LCFG_DEL_CONN: {
 842                 err = class_del_conn(obd, lcfg);
 843                 GOTO(out, err = 0);
 844         }
 845         case LCFG_POOL_NEW: {
 846                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 847                 GOTO(out, err = 0);
 848                 break;
 849         }
 850         case LCFG_POOL_ADD: {
 851                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 852                                    lustre_cfg_string(lcfg, 3));
 853                 GOTO(out, err = 0);
 854                 break;
 855         }
 856         case LCFG_POOL_REM: {
 857                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 858                                    lustre_cfg_string(lcfg, 3));
 859                 GOTO(out, err = 0);
 860                 break;
 861         }
 862         case LCFG_POOL_DEL: {
 863                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 864                 GOTO(out, err = 0);
 865                 break;
 866         }
 867         default: {
 868                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 869                 GOTO(out, err);
 870
 871         }
 872         }
 873 out:
 874         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 875                 CWARN("Ignoring error %d on optional command %#x\n", err,
 876                       lcfg->lcfg_command);
 877                 err = 0;
 878         }
 879         return err;
 880 }
 881
 882 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 883                              struct lustre_cfg *lcfg, void *data)
 884 {
 885 #ifdef __KERNEL__
 886         struct lprocfs_vars *var;
 887         char *key, *sval;
 888         int i, keylen, vallen;
 889         int matched = 0, j = 0;
 890         int rc = 0;
 891         ENTRY;
 892
 893         if (lcfg->lcfg_command != LCFG_PARAM) {
 894                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 895                 RETURN(-EINVAL);
 896         }
 897
 898         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 899            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 900            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 901         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 902                 key = lustre_cfg_buf(lcfg, i);
 903                 /* Strip off prefix */
 904                 class_match_param(key, prefix, &key);
 905                 sval = strchr(key, '=');
 906                 if (!sval || (*(sval + 1) == 0)) {
 907                         CERROR("Can't parse param %s (missing '=')\n", key);
 908                         /* rc = -EINVAL; continue parsing other params */
 909                         continue;
 910                 }
 911                 keylen = sval - key;
 912                 sval++;
 913                 vallen = strlen(sval);
 914                 matched = 0;
 915                 j = 0;
 916                 /* Search proc entries */
 917                 while (lvars[j].name) {
 918                         var = &lvars[j];
 919                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 920                             keylen == strlen(var->name)) {
 921                                 matched++;
 922                                 rc = -EROFS;
 923                                 if (var->write_fptr) {
 924                                         mm_segment_t oldfs;
 925                                         oldfs = get_fs();
 926                                         set_fs(KERNEL_DS);
 927                                         rc = (var->write_fptr)(NULL, sval,
 928                                                                vallen, data);
 929                                         set_fs(oldfs);
 930                                 }
 931                                 if (rc < 0)
 932                                         CERROR("writing proc entry %s err %d\n",
 933                                                var->name, rc);
 934                                 break;
 935                         }
 936                         j++;
 937                 }
 938                 if (!matched) {
 939                         /* If the prefix doesn't match, return error so we
 940                            can pass it down the stack */
 941                         if (strnchr(key, keylen, '.'))
 942                             RETURN(-ENOSYS);
 943                         CERROR("%s: unknown param %s\n",
 944                                (char *)lustre_cfg_string(lcfg, 0), key);
 945                         /* rc = -EINVAL;        continue parsing other params */
 946                 } else {
 947                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
 948                                       lustre_cfg_string(lcfg, 0),
 949                                       (int)strlen(prefix) - 1, prefix,
 950                                       (int)(sval - key - 1), key, sval);
 951                 }
 952         }
 953
 954         if (rc > 0)
 955                 rc = 0;
 956         RETURN(rc);
 957 #else
 958         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
 959         /* Don't throw config error */
 960         RETURN(0);
 961 #endif
 962 }
 963
 964 int class_config_dump_handler(struct llog_handle * handle,
 965                               struct llog_rec_hdr *rec, void *data);
 966
 967 #ifdef __KERNEL__
 968 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
 969 #else
 970 #define lustre_check_exclusion(a,b)  0
 971 #endif
 972
 973 static int class_config_llog_handler(struct llog_handle * handle,
 974                                      struct llog_rec_hdr *rec, void *data)
 975 {
 976         struct config_llog_instance *clli = data;
 977         int cfg_len = rec->lrh_len;
 978         char *cfg_buf = (char*) (rec + 1);
 979         int rc = 0;
 980         ENTRY;
 981
 982         //class_config_dump_handler(handle, rec, data);
 983
 984         switch (rec->lrh_type) {
 985         case OBD_CFG_REC: {
 986                 struct lustre_cfg *lcfg, *lcfg_new;
 987                 struct lustre_cfg_bufs bufs;
 988                 char *inst_name = NULL;
 989                 int inst_len = 0;
 990                 int inst = 0, swab = 0;
 991
 992                 lcfg = (struct lustre_cfg *)cfg_buf;
 993                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
 994                         lustre_swab_lustre_cfg(lcfg);
 995                         swab = 1;
 996                 }
 997
 998                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
 999                 if (rc)
1000                         GOTO(out, rc);
1001
1002                 /* Figure out config state info */
1003                 if (lcfg->lcfg_command == LCFG_MARKER) {
1004                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1005                         lustre_swab_cfg_marker(marker, swab,
1006                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1007                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1008                                clli->cfg_flags, marker->cm_flags);
1009                         if (marker->cm_flags & CM_START) {
1010                                 /* all previous flags off */
1011                                 clli->cfg_flags = CFG_F_MARKER;
1012                                 if (marker->cm_flags & CM_SKIP) {
1013                                         clli->cfg_flags |= CFG_F_SKIP;
1014                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1015                                                marker->cm_step);
1016                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1017                                            lustre_check_exclusion(clli->cfg_sb,
1018                                                           marker->cm_tgtname)) {
1019                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1020                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1021                                                marker->cm_step);
1022                                 }
1023                         } else if (marker->cm_flags & CM_END) {
1024                                 clli->cfg_flags = 0;
1025                         }
1026                 }
1027                 /* A config command without a start marker before it is
1028                    illegal (post 146) */
1029                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1030                     !(clli->cfg_flags & CFG_F_MARKER) &&
1031                     (lcfg->lcfg_command != LCFG_MARKER)) {
1032                         CWARN("Config not inside markers, ignoring! "
1033                               "(inst: %s, uuid: %s, flags: %#x)\n",
1034                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1035                               clli->cfg_uuid.uuid, clli->cfg_flags);
1036                         clli->cfg_flags |= CFG_F_SKIP;
1037                 }
1038                 if (clli->cfg_flags & CFG_F_SKIP) {
1039                         CDEBUG(D_CONFIG, "skipping %#x\n",
1040                                clli->cfg_flags);
1041                         rc = 0;
1042                         /* No processing! */
1043                         break;
1044                 }
1045
1046                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1047                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1048                         /* Add inactive instead */
1049                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1050
1051                 lustre_cfg_bufs_init(&bufs, lcfg);
1052
1053                 if (clli && clli->cfg_instance &&
1054                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1055                         inst = 1;
1056                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1057                                 strlen(clli->cfg_instance) + 1;
1058                         OBD_ALLOC(inst_name, inst_len);
1059                         if (inst_name == NULL)
1060                                 GOTO(out, rc = -ENOMEM);
1061                         sprintf(inst_name, "%s-%s",
1062                                 lustre_cfg_string(lcfg, 0),
1063                                 clli->cfg_instance);
1064                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1065                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1066                                lcfg->lcfg_command, inst_name);
1067                 }
1068
1069                 /* we override the llog's uuid for clients, to insure they
1070                 are unique */
1071                 if (clli && clli->cfg_instance &&
1072                     lcfg->lcfg_command == LCFG_ATTACH) {
1073                         lustre_cfg_bufs_set_string(&bufs, 2,
1074                                                    clli->cfg_uuid.uuid);
1075                 }
1076
1077                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1078
1079                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1080                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1081
1082                 /* XXX Hack to try to remain binary compatible with
1083                  * pre-newconfig logs */
1084                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1085                     (lcfg->lcfg_nid >> 32) == 0) {
1086                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1087
1088                         lcfg_new->lcfg_nid =
1089                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1090                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1091                               lcfg->lcfg_nal, addr,
1092                               libcfs_nid2str(lcfg_new->lcfg_nid));
1093                 } else {
1094                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1095                 }
1096
1097                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1098
1099                 rc = class_process_config(lcfg_new);
1100                 lustre_cfg_free(lcfg_new);
1101
1102                 if (inst)
1103                         OBD_FREE(inst_name, inst_len);
1104                 break;
1105         }
1106         default:
1107                 CERROR("Unknown llog record type %#x encountered\n",
1108                        rec->lrh_type);
1109                 break;
1110         }
1111 out:
1112         if (rc) {
1113                 CERROR("Err %d on cfg command:\n", rc);
1114                 class_config_dump_handler(handle, rec, data);
1115         }
1116         RETURN(rc);
1117 }
1118
1119 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1120                             struct config_llog_instance *cfg)
1121 {
1122         struct llog_process_cat_data cd = {0, 0};
1123         struct llog_handle *llh;
1124         int rc, rc2;
1125         ENTRY;
1126
1127         CDEBUG(D_INFO, "looking up llog %s\n", name);
1128         rc = llog_create(ctxt, &llh, NULL, name);
1129         if (rc)
1130                 RETURN(rc);
1131
1132         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1133         if (rc)
1134                 GOTO(parse_out, rc);
1135
1136         /* continue processing from where we last stopped to end-of-log */
1137         if (cfg)
1138                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1139         cd.lpcd_last_idx = 0;
1140
1141         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1142
1143         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1144                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1145
1146         if (cfg)
1147                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1148
1149 parse_out:
1150         rc2 = llog_close(llh);
1151         if (rc == 0)
1152                 rc = rc2;
1153
1154         RETURN(rc);
1155 }
1156
1157 int class_config_dump_handler(struct llog_handle * handle,
1158                               struct llog_rec_hdr *rec, void *data)
1159 {
1160         int cfg_len = rec->lrh_len;
1161         char *cfg_buf = (char*) (rec + 1);
1162         char *outstr, *ptr, *end;
1163         int rc = 0;
1164         ENTRY;
1165
1166         OBD_ALLOC(outstr, 256);
1167         end = outstr + 256;
1168         ptr = outstr;
1169         if (!outstr) {
1170                 RETURN(-ENOMEM);
1171         }
1172         if (rec->lrh_type == OBD_CFG_REC) {
1173                 struct lustre_cfg *lcfg;
1174                 int i;
1175
1176                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1177                 if (rc)
1178                         GOTO(out, rc);
1179                 lcfg = (struct lustre_cfg *)cfg_buf;
1180
1181                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1182                                 lcfg->lcfg_command);
1183                 if (lcfg->lcfg_flags) {
1184                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1185                                         lcfg->lcfg_flags);
1186                 }
1187                 if (lcfg->lcfg_num) {
1188                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1189                                         lcfg->lcfg_num);
1190                 }
1191                 if (lcfg->lcfg_nid) {
1192                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1193                                         libcfs_nid2str(lcfg->lcfg_nid),
1194                                         lcfg->lcfg_nid);
1195                 }
1196                 if (lcfg->lcfg_command == LCFG_MARKER) {
1197                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1198                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1199                                         marker->cm_step, marker->cm_flags,
1200                                         marker->cm_tgtname, marker->cm_comment);
1201                 } else {
1202                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1203                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1204                                                 lustre_cfg_string(lcfg, i));
1205                         }
1206                 }
1207                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1208         } else {
1209                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1210                 rc = -EINVAL;
1211         }
1212 out:
1213         OBD_FREE(outstr, 256);
1214         RETURN(rc);
1215 }
1216
1217 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1218                            struct config_llog_instance *cfg)
1219 {
1220         struct llog_handle *llh;
1221         int rc, rc2;
1222         ENTRY;
1223
1224         LCONSOLE_INFO("Dumping config log %s\n", name);
1225
1226         rc = llog_create(ctxt, &llh, NULL, name);
1227         if (rc)
1228                 RETURN(rc);
1229
1230         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1231         if (rc)
1232                 GOTO(parse_out, rc);
1233
1234         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1235 parse_out:
1236         rc2 = llog_close(llh);
1237         if (rc == 0)
1238                 rc = rc2;
1239
1240         LCONSOLE_INFO("End config log %s\n", name);
1241         RETURN(rc);
1242
1243 }
1244
1245 /* Cleanup and detach */
1246 int class_manual_cleanup(struct obd_device *obd)
1247 {
1248         struct lustre_cfg *lcfg;
1249         struct lustre_cfg_bufs bufs;
1250         int rc;
1251         char flags[3]="";
1252         ENTRY;
1253
1254         if (!obd) {
1255                 CERROR("empty cleanup\n");
1256                 RETURN(-EALREADY);
1257         }
1258
1259         if (obd->obd_force)
1260                 strcat(flags, "F");
1261         if (obd->obd_fail)
1262                 strcat(flags, "A");
1263
1264         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1265                obd->obd_name, flags);
1266
1267         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1268         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1269         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1270
1271         rc = class_process_config(lcfg);
1272         if (rc) {
1273                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1274                 GOTO(out, rc);
1275         }
1276
1277         /* the lcfg is almost the same for both ops */
1278         lcfg->lcfg_command = LCFG_DETACH;
1279         rc = class_process_config(lcfg);
1280         if (rc)
1281                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1282 out:
1283         lustre_cfg_free(lcfg);
1284         RETURN(rc);
1285 }
1286
1287 /*
1288  * uuid<->export lustre hash operations
1289  */
1290
1291 static unsigned
1292 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1293 {
1294         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1295                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1296 }
1297
1298 static void *
1299 uuid_key(struct hlist_node *hnode)
1300 {
1301         struct obd_export *exp;
1302
1303         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1304
1305         RETURN(&exp->exp_client_uuid);
1306 }
1307
1308 /*
1309  * NOTE: It is impossible to find an export that is in failed
1310  *       state with this function
1311  */
1312 static int
1313 uuid_compare(void *key, struct hlist_node *hnode)
1314 {
1315         struct obd_export *exp;
1316
1317         LASSERT(key);
1318         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1319
1320         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1321                !exp->exp_failed);
1322 }
1323
1324 static void *
1325 uuid_export_get(struct hlist_node *hnode)
1326 {
1327         struct obd_export *exp;
1328
1329         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1330         class_export_get(exp);
1331
1332         RETURN(exp);
1333 }
1334
1335 static void *
1336 uuid_export_put(struct hlist_node *hnode)
1337 {
1338         struct obd_export *exp;
1339
1340         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1341         class_export_put(exp);
1342
1343         RETURN(exp);
1344 }
1345
1346 static lustre_hash_ops_t uuid_hash_ops = {
1347         .lh_hash    = uuid_hash,
1348         .lh_key     = uuid_key,
1349         .lh_compare = uuid_compare,
1350         .lh_get     = uuid_export_get,
1351         .lh_put     = uuid_export_put,
1352 };
1353
1354
1355 /*
1356  * nid<->export hash operations
1357  */
1358
1359 static unsigned
1360 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1361 {
1362         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1363 }
1364
1365 static void *
1366 nid_key(struct hlist_node *hnode)
1367 {
1368         struct obd_export *exp;
1369
1370         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1371
1372         RETURN(&exp->exp_connection->c_peer.nid);
1373 }
1374
1375 /*
1376  * NOTE: It is impossible to find an export that is in failed
1377  *       state with this function
1378  */
1379 static int
1380 nid_compare(void *key, struct hlist_node *hnode)
1381 {
1382         struct obd_export *exp;
1383
1384         LASSERT(key);
1385         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1386
1387         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1388                !exp->exp_failed);
1389 }
1390
1391 static void *
1392 nid_export_get(struct hlist_node *hnode)
1393 {
1394         struct obd_export *exp;
1395
1396         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1397         class_export_get(exp);
1398
1399         RETURN(exp);
1400 }
1401
1402 static void *
1403 nid_export_put(struct hlist_node *hnode)
1404 {
1405         struct obd_export *exp;
1406
1407         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1408         class_export_put(exp);
1409
1410         RETURN(exp);
1411 }
1412
1413 static lustre_hash_ops_t nid_hash_ops = {
1414         .lh_hash    = nid_hash,
1415         .lh_key     = nid_key,
1416         .lh_compare = nid_compare,
1417         .lh_get     = nid_export_get,
1418         .lh_put     = nid_export_put,
1419 };
1420
1421
1422 /*
1423  * nid<->nidstats hash operations
1424  */
1425
1426 static void *
1427 nidstats_key(struct hlist_node *hnode)
1428 {
1429         struct nid_stat *ns;
1430
1431         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1432
1433         RETURN(&ns->nid);
1434 }
1435
1436 static int
1437 nidstats_compare(void *key, struct hlist_node *hnode)
1438 {
1439         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1440 }
1441
1442 static void *
1443 nidstats_get(struct hlist_node *hnode)
1444 {
1445         struct nid_stat *ns;
1446
1447         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1448         ns->nid_exp_ref_count++;
1449
1450         RETURN(ns);
1451 }
1452
1453 static void *
1454 nidstats_put(struct hlist_node *hnode)
1455 {
1456         struct nid_stat *ns;
1457
1458         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1459         ns->nid_exp_ref_count--;
1460
1461         RETURN(ns);
1462 }
1463
1464 static lustre_hash_ops_t nid_stat_hash_ops = {
1465         .lh_hash    = nid_hash,
1466         .lh_key     = nidstats_key,
1467         .lh_compare = nidstats_compare,
1468         .lh_get     = nidstats_get,
1469         .lh_put     = nidstats_put,
1470 };