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, -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, -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, -ENOMEM);
 308
 309         exp = class_new_export(obd, &obd->obd_uuid);
 310         if (IS_ERR(exp))
 311                 RETURN(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
 333 err_exp:
 334         class_unlink_export(obd->obd_self_export);
 335         obd->obd_self_export = NULL;
 336 err_hash:
 337         lustre_hash_exit(obd->obd_uuid_hash);
 338         lustre_hash_exit(obd->obd_nid_hash);
 339         lustre_hash_exit(obd->obd_nid_stats_hash);
 340         obd->obd_starting = 0;
 341         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 342         RETURN(err);
 343 }
 344
 345 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 346 {
 347         ENTRY;
 348
 349         if (obd->obd_set_up) {
 350                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 351                 RETURN(-EBUSY);
 352         }
 353
 354         spin_lock(&obd->obd_dev_lock);
 355         if (!obd->obd_attached) {
 356                 spin_unlock(&obd->obd_dev_lock);
 357                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 358                 RETURN(-ENODEV);
 359         }
 360         obd->obd_attached = 0;
 361         spin_unlock(&obd->obd_dev_lock);
 362
 363         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 364                obd->obd_name, obd->obd_uuid.uuid);
 365
 366         class_decref(obd, "attach", obd);
 367
 368         /* not strictly necessary, but cleans up eagerly */
 369         obd_zombie_impexp_cull();
 370
 371         RETURN(0);
 372 }
 373
 374 static void dump_exports(struct obd_device *obd)
 375 {
 376         struct obd_export *exp, *n;
 377
 378         list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
 379                 struct ptlrpc_reply_state *rs;
 380                 struct ptlrpc_reply_state *first_reply = NULL;
 381                 int                        nreplies = 0;
 382
 383                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 384                                      rs_exp_list) {
 385                         if (nreplies == 0)
 386                                 first_reply = rs;
 387                         nreplies++;
 388                 }
 389
 390                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 391                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 392                        obd_export_nid2str(exp),
 393                        atomic_read(&exp->exp_refcount),
 394                        exp->exp_failed, nreplies, first_reply,
 395                        nreplies > 3 ? "..." : "");
 396         }
 397 }
 398
 399 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 400 {
 401         int err = 0;
 402         char *flag;
 403         ENTRY;
 404
 405         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 406
 407         if (!obd->obd_set_up) {
 408                 CERROR("Device %d not setup\n", obd->obd_minor);
 409                 RETURN(-ENODEV);
 410         }
 411
 412         spin_lock(&obd->obd_dev_lock);
 413         if (obd->obd_stopping) {
 414                 spin_unlock(&obd->obd_dev_lock);
 415                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 416                 RETURN(-ENODEV);
 417         }
 418         /* Leave this on forever */
 419         obd->obd_stopping = 1;
 420         spin_unlock(&obd->obd_dev_lock);
 421
 422         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 423                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 424                         switch (*flag) {
 425                         case 'F':
 426                                 obd->obd_force = 1;
 427                                 break;
 428                         case 'A':
 429                                 LCONSOLE_WARN("Failing over %s\n",
 430                                               obd->obd_name);
 431                                 obd->obd_fail = 1;
 432                                 obd->obd_no_transno = 1;
 433                                 obd->obd_no_recov = 1;
 434                                 /* Set the obd readonly if we can */
 435                                 if (OBP(obd, iocontrol))
 436                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 437                                                       obd->obd_self_export,
 438                                                       0, NULL, NULL);
 439                                 break;
 440                         default:
 441                                 CERROR("unrecognised flag '%c'\n",
 442                                        *flag);
 443                         }
 444         }
 445
 446         /* The three references that should be remaining are the
 447          * obd_self_export and the attach and setup references. */
 448         if (atomic_read(&obd->obd_refcount) > 3) {
 449 #if 0           /* We should never fail to cleanup with mountconf */
 450                 if (!(obd->obd_fail || obd->obd_force)) {
 451                         CERROR("OBD %s is still busy with %d references\n"
 452                                "You should stop active file system users,"
 453                                " or use the --force option to cleanup.\n",
 454                                obd->obd_name, atomic_read(&obd->obd_refcount));
 455                         dump_exports(obd);
 456                         /* Allow a failed cleanup to try again. */
 457                         obd->obd_stopping = 0;
 458                 }
 459 #endif
 460                 /* refcounf - 3 might be the number of real exports
 461                    (excluding self export). But class_incref is called
 462                    by other things as well, so don't count on it. */
 463                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 464                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 465                 dump_exports(obd);
 466                 class_disconnect_exports(obd);
 467         }
 468         LASSERT(obd->obd_self_export);
 469
 470         /* destroy an uuid-export hash body */
 471         lustre_hash_exit(obd->obd_uuid_hash);
 472
 473         /* destroy a nid-export hash body */
 474         lustre_hash_exit(obd->obd_nid_hash);
 475
 476         /* destroy a nid-stats hash body */
 477         lustre_hash_exit(obd->obd_nid_stats_hash);
 478
 479         /* Precleanup, we must make sure all exports get destroyed. */
 480         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 481         if (err)
 482                 CERROR("Precleanup %s returned %d\n",
 483                        obd->obd_name, err);
 484         class_decref(obd, "setup", obd);
 485         obd->obd_set_up = 0;
 486         RETURN(0);
 487 }
 488
 489 struct obd_device *class_incref(struct obd_device *obd,
 490                                 const char *scope, const void *source)
 491 {
 492         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 493         atomic_inc(&obd->obd_refcount);
 494         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 495                atomic_read(&obd->obd_refcount));
 496
 497         return obd;
 498 }
 499
 500 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 501 {
 502         int err;
 503         int refs;
 504
 505         spin_lock(&obd->obd_dev_lock);
 506         atomic_dec(&obd->obd_refcount);
 507         refs = atomic_read(&obd->obd_refcount);
 508         spin_unlock(&obd->obd_dev_lock);
 509         lu_ref_del(&obd->obd_reference, scope, source);
 510
 511         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 512
 513         if ((refs == 1) && obd->obd_stopping) {
 514                 /* All exports have been destroyed; there should
 515                    be no more in-progress ops by this point.*/
 516
 517                 spin_lock(&obd->obd_self_export->exp_lock);
 518                 obd->obd_self_export->exp_flags |=
 519                         (obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
 520                         (obd->obd_force ? OBD_OPT_FORCE : 0);
 521                 spin_unlock(&obd->obd_self_export->exp_lock);
 522
 523                 /* note that we'll recurse into class_decref again */
 524                 class_unlink_export(obd->obd_self_export);
 525                 return;
 526         }
 527
 528         if (refs == 0) {
 529                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 530                        obd->obd_name, obd->obd_uuid.uuid);
 531                 LASSERT(!obd->obd_attached);
 532                 if (obd->obd_stopping) {
 533                         /* If we're not stopping, we were never set up */
 534                         err = obd_cleanup(obd);
 535                         if (err)
 536                                 CERROR("Cleanup %s returned %d\n",
 537                                        obd->obd_name, err);
 538                 }
 539                 if (OBP(obd, detach)) {
 540                         err = OBP(obd,detach)(obd);
 541                         if (err)
 542                                 CERROR("Detach returned %d\n", err);
 543                 }
 544                 class_release_dev(obd);
 545         }
 546 }
 547
 548 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 549 {
 550         struct obd_import *imp;
 551         struct obd_uuid uuid;
 552         int rc;
 553         ENTRY;
 554
 555         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 556             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 557                 CERROR("invalid conn_uuid\n");
 558                 RETURN(-EINVAL);
 559         }
 560         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 561             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 562             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 563                 CERROR("can't add connection on non-client dev\n");
 564                 RETURN(-EINVAL);
 565         }
 566
 567         imp = obd->u.cli.cl_import;
 568         if (!imp) {
 569                 CERROR("try to add conn on immature client dev\n");
 570                 RETURN(-EINVAL);
 571         }
 572
 573         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 574         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 575
 576         RETURN(rc);
 577 }
 578
 579 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 580 {
 581         struct obd_import *imp;
 582         struct obd_uuid uuid;
 583         int rc;
 584         ENTRY;
 585
 586         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 587             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 588                 CERROR("invalid conn_uuid\n");
 589                 RETURN(-EINVAL);
 590         }
 591         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 592             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 593                 CERROR("can't del connection on non-client dev\n");
 594                 RETURN(-EINVAL);
 595         }
 596
 597         imp = obd->u.cli.cl_import;
 598         if (!imp) {
 599                 CERROR("try to del conn on immature client dev\n");
 600                 RETURN(-EINVAL);
 601         }
 602
 603         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 604         rc = obd_del_conn(imp, &uuid);
 605
 606         RETURN(rc);
 607 }
 608
 609 CFS_LIST_HEAD(lustre_profile_list);
 610
 611 struct lustre_profile *class_get_profile(const char * prof)
 612 {
 613         struct lustre_profile *lprof;
 614
 615         ENTRY;
 616         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 617                 if (!strcmp(lprof->lp_profile, prof)) {
 618                         RETURN(lprof);
 619                 }
 620         }
 621         RETURN(NULL);
 622 }
 623
 624 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 625                       int mdclen, char *mdc)
 626 {
 627         struct lustre_profile *lprof;
 628         int err = 0;
 629         ENTRY;
 630
 631         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 632
 633         OBD_ALLOC(lprof, sizeof(*lprof));
 634         if (lprof == NULL)
 635                 RETURN(-ENOMEM);
 636         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 637
 638         LASSERT(proflen == (strlen(prof) + 1));
 639         OBD_ALLOC(lprof->lp_profile, proflen);
 640         if (lprof->lp_profile == NULL)
 641                 GOTO(out, err = -ENOMEM);
 642         memcpy(lprof->lp_profile, prof, proflen);
 643
 644         LASSERT(osclen == (strlen(osc) + 1));
 645         OBD_ALLOC(lprof->lp_dt, osclen);
 646         if (lprof->lp_dt == NULL)
 647                 GOTO(out, err = -ENOMEM);
 648         memcpy(lprof->lp_dt, osc, osclen);
 649
 650         if (mdclen > 0) {
 651                 LASSERT(mdclen == (strlen(mdc) + 1));
 652                 OBD_ALLOC(lprof->lp_md, mdclen);
 653                 if (lprof->lp_md == NULL)
 654                         GOTO(out, err = -ENOMEM);
 655                 memcpy(lprof->lp_md, mdc, mdclen);
 656         }
 657
 658         list_add(&lprof->lp_list, &lustre_profile_list);
 659         RETURN(err);
 660
 661 out:
 662         if (lprof->lp_md)
 663                 OBD_FREE(lprof->lp_md, mdclen);
 664         if (lprof->lp_dt)
 665                 OBD_FREE(lprof->lp_dt, osclen);
 666         if (lprof->lp_profile)
 667                 OBD_FREE(lprof->lp_profile, proflen);
 668         OBD_FREE(lprof, sizeof(*lprof));
 669         RETURN(err);
 670 }
 671
 672 void class_del_profile(const char *prof)
 673 {
 674         struct lustre_profile *lprof;
 675         ENTRY;
 676
 677         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 678
 679         lprof = class_get_profile(prof);
 680         if (lprof) {
 681                 list_del(&lprof->lp_list);
 682                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 683                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 684                 if (lprof->lp_md)
 685                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 686                 OBD_FREE(lprof, sizeof *lprof);
 687         }
 688         EXIT;
 689 }
 690
 691 /* COMPAT_146 */
 692 void class_del_profiles(void)
 693 {
 694         struct lustre_profile *lprof, *n;
 695         ENTRY;
 696
 697         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 698                 list_del(&lprof->lp_list);
 699                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 700                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 701                 if (lprof->lp_md)
 702                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 703                 OBD_FREE(lprof, sizeof *lprof);
 704         }
 705         EXIT;
 706 }
 707
 708 /* We can't call ll_process_config directly because it lives in a module that
 709    must be loaded after this one. */
 710 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 711
 712 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 713 {
 714         client_process_config = cpc;
 715 }
 716 EXPORT_SYMBOL(lustre_register_client_process_config);
 717
 718 int class_process_config(struct lustre_cfg *lcfg)
 719 {
 720         struct obd_device *obd;
 721         int err;
 722
 723         LASSERT(lcfg && !IS_ERR(lcfg));
 724         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 725
 726         /* Commands that don't need a device */
 727         switch(lcfg->lcfg_command) {
 728         case LCFG_ATTACH: {
 729                 err = class_attach(lcfg);
 730                 GOTO(out, err);
 731         }
 732         case LCFG_ADD_UUID: {
 733                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 734                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 735                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 736
 737                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 738                 GOTO(out, err);
 739         }
 740         case LCFG_DEL_UUID: {
 741                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 742                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 743                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 744
 745                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 746                 GOTO(out, err);
 747         }
 748         case LCFG_MOUNTOPT: {
 749                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 750                        lustre_cfg_string(lcfg, 1),
 751                        lustre_cfg_string(lcfg, 2),
 752                        lustre_cfg_string(lcfg, 3));
 753                 /* set these mount options somewhere, so ll_fill_super
 754                  * can find them. */
 755                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 756                                         lustre_cfg_string(lcfg, 1),
 757                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 758                                         lustre_cfg_string(lcfg, 2),
 759                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 760                                         lustre_cfg_string(lcfg, 3));
 761                 GOTO(out, err);
 762         }
 763         case LCFG_DEL_MOUNTOPT: {
 764                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 765                        lustre_cfg_string(lcfg, 1));
 766                 class_del_profile(lustre_cfg_string(lcfg, 1));
 767                 GOTO(out, err = 0);
 768         }
 769         case LCFG_SET_TIMEOUT: {
 770                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 771                        obd_timeout, lcfg->lcfg_num);
 772                 obd_timeout = max(lcfg->lcfg_num, 1U);
 773                 GOTO(out, err = 0);
 774         }
 775         case LCFG_SET_UPCALL: {
 776                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 777                 /* COMPAT_146 Don't fail on old configs */
 778                 GOTO(out, err = 0);
 779         }
 780         case LCFG_MARKER: {
 781                 struct cfg_marker *marker;
 782                 marker = lustre_cfg_buf(lcfg, 1);
 783                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 784                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 785                 GOTO(out, err = 0);
 786         }
 787         case LCFG_PARAM: {
 788                 /* llite has no obd */
 789                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 790                                        PARAM_LLITE, 0) == 0) &&
 791                     client_process_config) {
 792                         err = (*client_process_config)(lcfg);
 793                         GOTO(out, err);
 794                 }
 795                 /* Fall through */
 796                 break;
 797         }
 798         }
 799
 800         /* Commands that require a device */
 801         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 802         if (obd == NULL) {
 803                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 804                         CERROR("this lcfg command requires a device name\n");
 805                 else
 806                         CERROR("no device for: %s\n",
 807                                lustre_cfg_string(lcfg, 0));
 808
 809                 GOTO(out, err = -EINVAL);
 810         }
 811
 812         switch(lcfg->lcfg_command) {
 813         case LCFG_SETUP: {
 814                 err = class_setup(obd, lcfg);
 815                 GOTO(out, err);
 816         }
 817         case LCFG_DETACH: {
 818                 err = class_detach(obd, lcfg);
 819                 GOTO(out, err = 0);
 820         }
 821         case LCFG_CLEANUP: {
 822                 err = class_cleanup(obd, lcfg);
 823                 GOTO(out, err = 0);
 824         }
 825         case LCFG_ADD_CONN: {
 826                 err = class_add_conn(obd, lcfg);
 827                 GOTO(out, err = 0);
 828         }
 829         case LCFG_DEL_CONN: {
 830                 err = class_del_conn(obd, lcfg);
 831                 GOTO(out, err = 0);
 832         }
 833         case LCFG_POOL_NEW: {
 834                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 835                 GOTO(out, err = 0);
 836                 break;
 837         }
 838         case LCFG_POOL_ADD: {
 839                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 840                                    lustre_cfg_string(lcfg, 3));
 841                 GOTO(out, err = 0);
 842                 break;
 843         }
 844         case LCFG_POOL_REM: {
 845                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 846                                    lustre_cfg_string(lcfg, 3));
 847                 GOTO(out, err = 0);
 848                 break;
 849         }
 850         case LCFG_POOL_DEL: {
 851                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 852                 GOTO(out, err = 0);
 853                 break;
 854         }
 855         default: {
 856                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 857                 GOTO(out, err);
 858
 859         }
 860         }
 861 out:
 862         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 863                 CWARN("Ignoring error %d on optional command %#x\n", err,
 864                       lcfg->lcfg_command);
 865                 err = 0;
 866         }
 867         return err;
 868 }
 869
 870 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 871                              struct lustre_cfg *lcfg, void *data)
 872 {
 873 #ifdef __KERNEL__
 874         struct lprocfs_vars *var;
 875         char *key, *sval;
 876         int i, keylen, vallen;
 877         int matched = 0, j = 0;
 878         int rc = 0;
 879         ENTRY;
 880
 881         if (lcfg->lcfg_command != LCFG_PARAM) {
 882                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 883                 RETURN(-EINVAL);
 884         }
 885
 886         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 887            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 888            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 889         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 890                 key = lustre_cfg_buf(lcfg, i);
 891                 /* Strip off prefix */
 892                 class_match_param(key, prefix, &key);
 893                 sval = strchr(key, '=');
 894                 if (!sval || (*(sval + 1) == 0)) {
 895                         CERROR("Can't parse param %s (missing '=')\n", key);
 896                         /* rc = -EINVAL; continue parsing other params */
 897                         continue;
 898                 }
 899                 keylen = sval - key;
 900                 sval++;
 901                 vallen = strlen(sval);
 902                 matched = 0;
 903                 j = 0;
 904                 /* Search proc entries */
 905                 while (lvars[j].name) {
 906                         var = &lvars[j];
 907                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 908                             keylen == strlen(var->name)) {
 909                                 matched++;
 910                                 rc = -EROFS;
 911                                 if (var->write_fptr) {
 912                                         mm_segment_t oldfs;
 913                                         oldfs = get_fs();
 914                                         set_fs(KERNEL_DS);
 915                                         rc = (var->write_fptr)(NULL, sval,
 916                                                                vallen, data);
 917                                         set_fs(oldfs);
 918                                 }
 919                                 if (rc < 0)
 920                                         CERROR("writing proc entry %s err %d\n",
 921                                                var->name, rc);
 922                                 break;
 923                         }
 924                         j++;
 925                 }
 926                 if (!matched) {
 927                         /* If the prefix doesn't match, return error so we
 928                            can pass it down the stack */
 929                         if (strnchr(key, keylen, '.'))
 930                             RETURN(-ENOSYS);
 931                         CERROR("%s: unknown param %s\n",
 932                                (char *)lustre_cfg_string(lcfg, 0), key);
 933                         /* rc = -EINVAL;        continue parsing other params */
 934                 } else {
 935                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
 936                                       lustre_cfg_string(lcfg, 0),
 937                                       (int)strlen(prefix) - 1, prefix,
 938                                       (int)(sval - key - 1), key, sval);
 939                 }
 940         }
 941
 942         if (rc > 0)
 943                 rc = 0;
 944         RETURN(rc);
 945 #else
 946         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
 947         /* Don't throw config error */
 948         RETURN(0);
 949 #endif
 950 }
 951
 952 int class_config_dump_handler(struct llog_handle * handle,
 953                               struct llog_rec_hdr *rec, void *data);
 954
 955 #ifdef __KERNEL__
 956 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
 957 #else
 958 #define lustre_check_exclusion(a,b)  0
 959 #endif
 960
 961 static int class_config_llog_handler(struct llog_handle * handle,
 962                                      struct llog_rec_hdr *rec, void *data)
 963 {
 964         struct config_llog_instance *clli = data;
 965         int cfg_len = rec->lrh_len;
 966         char *cfg_buf = (char*) (rec + 1);
 967         int rc = 0;
 968         ENTRY;
 969
 970         //class_config_dump_handler(handle, rec, data);
 971
 972         switch (rec->lrh_type) {
 973         case OBD_CFG_REC: {
 974                 struct lustre_cfg *lcfg, *lcfg_new;
 975                 struct lustre_cfg_bufs bufs;
 976                 char *inst_name = NULL;
 977                 int inst_len = 0;
 978                 int inst = 0, swab = 0;
 979
 980                 lcfg = (struct lustre_cfg *)cfg_buf;
 981                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
 982                         lustre_swab_lustre_cfg(lcfg);
 983                         swab = 1;
 984                 }
 985
 986                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
 987                 if (rc)
 988                         GOTO(out, rc);
 989
 990                 /* Figure out config state info */
 991                 if (lcfg->lcfg_command == LCFG_MARKER) {
 992                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
 993                         lustre_swab_cfg_marker(marker, swab,
 994                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
 995                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
 996                                clli->cfg_flags, marker->cm_flags);
 997                         if (marker->cm_flags & CM_START) {
 998                                 /* all previous flags off */
 999                                 clli->cfg_flags = CFG_F_MARKER;
1000                                 if (marker->cm_flags & CM_SKIP) {
1001                                         clli->cfg_flags |= CFG_F_SKIP;
1002                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1003                                                marker->cm_step);
1004                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1005                                            lustre_check_exclusion(clli->cfg_sb,
1006                                                           marker->cm_tgtname)) {
1007                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1008                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1009                                                marker->cm_step);
1010                                 }
1011                         } else if (marker->cm_flags & CM_END) {
1012                                 clli->cfg_flags = 0;
1013                         }
1014                 }
1015                 /* A config command without a start marker before it is
1016                    illegal (post 146) */
1017                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1018                     !(clli->cfg_flags & CFG_F_MARKER) &&
1019                     (lcfg->lcfg_command != LCFG_MARKER)) {
1020                         CWARN("Config not inside markers, ignoring! "
1021                               "(inst: %s, uuid: %s, flags: %#x)\n",
1022                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1023                               clli->cfg_uuid.uuid, clli->cfg_flags);
1024                         clli->cfg_flags |= CFG_F_SKIP;
1025                 }
1026                 if (clli->cfg_flags & CFG_F_SKIP) {
1027                         CDEBUG(D_CONFIG, "skipping %#x\n",
1028                                clli->cfg_flags);
1029                         rc = 0;
1030                         /* No processing! */
1031                         break;
1032                 }
1033
1034                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1035                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1036                         /* Add inactive instead */
1037                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1038
1039                 lustre_cfg_bufs_init(&bufs, lcfg);
1040
1041                 if (clli && clli->cfg_instance &&
1042                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1043                         inst = 1;
1044                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1045                                 strlen(clli->cfg_instance) + 1;
1046                         OBD_ALLOC(inst_name, inst_len);
1047                         if (inst_name == NULL)
1048                                 GOTO(out, rc = -ENOMEM);
1049                         sprintf(inst_name, "%s-%s",
1050                                 lustre_cfg_string(lcfg, 0),
1051                                 clli->cfg_instance);
1052                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1053                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1054                                lcfg->lcfg_command, inst_name);
1055                 }
1056
1057                 /* we override the llog's uuid for clients, to insure they
1058                 are unique */
1059                 if (clli && clli->cfg_instance &&
1060                     lcfg->lcfg_command == LCFG_ATTACH) {
1061                         lustre_cfg_bufs_set_string(&bufs, 2,
1062                                                    clli->cfg_uuid.uuid);
1063                 }
1064
1065                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1066
1067                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1068                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1069
1070                 /* XXX Hack to try to remain binary compatible with
1071                  * pre-newconfig logs */
1072                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1073                     (lcfg->lcfg_nid >> 32) == 0) {
1074                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1075
1076                         lcfg_new->lcfg_nid =
1077                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1078                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1079                               lcfg->lcfg_nal, addr,
1080                               libcfs_nid2str(lcfg_new->lcfg_nid));
1081                 } else {
1082                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1083                 }
1084
1085                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1086
1087                 rc = class_process_config(lcfg_new);
1088                 lustre_cfg_free(lcfg_new);
1089
1090                 if (inst)
1091                         OBD_FREE(inst_name, inst_len);
1092                 break;
1093         }
1094         default:
1095                 CERROR("Unknown llog record type %#x encountered\n",
1096                        rec->lrh_type);
1097                 break;
1098         }
1099 out:
1100         if (rc) {
1101                 CERROR("Err %d on cfg command:\n", rc);
1102                 class_config_dump_handler(handle, rec, data);
1103         }
1104         RETURN(rc);
1105 }
1106
1107 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1108                             struct config_llog_instance *cfg)
1109 {
1110         struct llog_process_cat_data cd = {0, 0};
1111         struct llog_handle *llh;
1112         int rc, rc2;
1113         ENTRY;
1114
1115         CDEBUG(D_INFO, "looking up llog %s\n", name);
1116         rc = llog_create(ctxt, &llh, NULL, name);
1117         if (rc)
1118                 RETURN(rc);
1119
1120         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1121         if (rc)
1122                 GOTO(parse_out, rc);
1123
1124         /* continue processing from where we last stopped to end-of-log */
1125         if (cfg)
1126                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1127         cd.lpcd_last_idx = 0;
1128
1129         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1130
1131         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1132                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1133
1134         if (cfg)
1135                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1136
1137 parse_out:
1138         rc2 = llog_close(llh);
1139         if (rc == 0)
1140                 rc = rc2;
1141
1142         RETURN(rc);
1143 }
1144
1145 int class_config_dump_handler(struct llog_handle * handle,
1146                               struct llog_rec_hdr *rec, void *data)
1147 {
1148         int cfg_len = rec->lrh_len;
1149         char *cfg_buf = (char*) (rec + 1);
1150         char *outstr, *ptr, *end;
1151         int rc = 0;
1152         ENTRY;
1153
1154         OBD_ALLOC(outstr, 256);
1155         end = outstr + 256;
1156         ptr = outstr;
1157         if (!outstr) {
1158                 RETURN(-ENOMEM);
1159         }
1160         if (rec->lrh_type == OBD_CFG_REC) {
1161                 struct lustre_cfg *lcfg;
1162                 int i;
1163
1164                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1165                 if (rc)
1166                         GOTO(out, rc);
1167                 lcfg = (struct lustre_cfg *)cfg_buf;
1168
1169                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1170                                 lcfg->lcfg_command);
1171                 if (lcfg->lcfg_flags) {
1172                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1173                                         lcfg->lcfg_flags);
1174                 }
1175                 if (lcfg->lcfg_num) {
1176                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1177                                         lcfg->lcfg_num);
1178                 }
1179                 if (lcfg->lcfg_nid) {
1180                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1181                                         libcfs_nid2str(lcfg->lcfg_nid),
1182                                         lcfg->lcfg_nid);
1183                 }
1184                 if (lcfg->lcfg_command == LCFG_MARKER) {
1185                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1186                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1187                                         marker->cm_step, marker->cm_flags,
1188                                         marker->cm_tgtname, marker->cm_comment);
1189                 } else {
1190                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1191                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1192                                                 lustre_cfg_string(lcfg, i));
1193                         }
1194                 }
1195                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1196         } else {
1197                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1198                 rc = -EINVAL;
1199         }
1200 out:
1201         OBD_FREE(outstr, 256);
1202         RETURN(rc);
1203 }
1204
1205 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1206                            struct config_llog_instance *cfg)
1207 {
1208         struct llog_handle *llh;
1209         int rc, rc2;
1210         ENTRY;
1211
1212         LCONSOLE_INFO("Dumping config log %s\n", name);
1213
1214         rc = llog_create(ctxt, &llh, NULL, name);
1215         if (rc)
1216                 RETURN(rc);
1217
1218         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1219         if (rc)
1220                 GOTO(parse_out, rc);
1221
1222         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1223 parse_out:
1224         rc2 = llog_close(llh);
1225         if (rc == 0)
1226                 rc = rc2;
1227
1228         LCONSOLE_INFO("End config log %s\n", name);
1229         RETURN(rc);
1230
1231 }
1232
1233 /* Cleanup and detach */
1234 int class_manual_cleanup(struct obd_device *obd)
1235 {
1236         struct lustre_cfg *lcfg;
1237         struct lustre_cfg_bufs bufs;
1238         int rc;
1239         char flags[3]="";
1240         ENTRY;
1241
1242         if (!obd) {
1243                 CERROR("empty cleanup\n");
1244                 RETURN(-EALREADY);
1245         }
1246
1247         if (obd->obd_force)
1248                 strcat(flags, "F");
1249         if (obd->obd_fail)
1250                 strcat(flags, "A");
1251
1252         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1253                obd->obd_name, flags);
1254
1255         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1256         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1257         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1258
1259         rc = class_process_config(lcfg);
1260         if (rc) {
1261                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1262                 GOTO(out, rc);
1263         }
1264
1265         /* the lcfg is almost the same for both ops */
1266         lcfg->lcfg_command = LCFG_DETACH;
1267         rc = class_process_config(lcfg);
1268         if (rc)
1269                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1270 out:
1271         lustre_cfg_free(lcfg);
1272         RETURN(rc);
1273 }
1274
1275 /*
1276  * uuid<->export lustre hash operations
1277  */
1278
1279 static unsigned
1280 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1281 {
1282         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1283                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1284 }
1285
1286 static void *
1287 uuid_key(struct hlist_node *hnode)
1288 {
1289         struct obd_export *exp;
1290
1291         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1292
1293         RETURN(&exp->exp_client_uuid);
1294 }
1295
1296 /*
1297  * NOTE: It is impossible to find an export that is in failed
1298  *       state with this function
1299  */
1300 static int
1301 uuid_compare(void *key, struct hlist_node *hnode)
1302 {
1303         struct obd_export *exp;
1304
1305         LASSERT(key);
1306         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1307
1308         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1309                !exp->exp_failed);
1310 }
1311
1312 static void *
1313 uuid_export_get(struct hlist_node *hnode)
1314 {
1315         struct obd_export *exp;
1316
1317         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1318         class_export_get(exp);
1319
1320         RETURN(exp);
1321 }
1322
1323 static void *
1324 uuid_export_put(struct hlist_node *hnode)
1325 {
1326         struct obd_export *exp;
1327
1328         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1329         class_export_put(exp);
1330
1331         RETURN(exp);
1332 }
1333
1334 static lustre_hash_ops_t uuid_hash_ops = {
1335         .lh_hash    = uuid_hash,
1336         .lh_key     = uuid_key,
1337         .lh_compare = uuid_compare,
1338         .lh_get     = uuid_export_get,
1339         .lh_put     = uuid_export_put,
1340 };
1341
1342
1343 /*
1344  * nid<->export hash operations
1345  */
1346
1347 static unsigned
1348 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1349 {
1350         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1351 }
1352
1353 static void *
1354 nid_key(struct hlist_node *hnode)
1355 {
1356         struct obd_export *exp;
1357
1358         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1359
1360         RETURN(&exp->exp_connection->c_peer.nid);
1361 }
1362
1363 /*
1364  * NOTE: It is impossible to find an export that is in failed
1365  *       state with this function
1366  */
1367 static int
1368 nid_compare(void *key, struct hlist_node *hnode)
1369 {
1370         struct obd_export *exp;
1371
1372         LASSERT(key);
1373         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1374
1375         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1376                !exp->exp_failed);
1377 }
1378
1379 static void *
1380 nid_export_get(struct hlist_node *hnode)
1381 {
1382         struct obd_export *exp;
1383
1384         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1385         class_export_get(exp);
1386
1387         RETURN(exp);
1388 }
1389
1390 static void *
1391 nid_export_put(struct hlist_node *hnode)
1392 {
1393         struct obd_export *exp;
1394
1395         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1396         class_export_put(exp);
1397
1398         RETURN(exp);
1399 }
1400
1401 static lustre_hash_ops_t nid_hash_ops = {
1402         .lh_hash    = nid_hash,
1403         .lh_key     = nid_key,
1404         .lh_compare = nid_compare,
1405         .lh_get     = nid_export_get,
1406         .lh_put     = nid_export_put,
1407 };
1408
1409
1410 /*
1411  * nid<->nidstats hash operations
1412  */
1413
1414 static void *
1415 nidstats_key(struct hlist_node *hnode)
1416 {
1417         struct nid_stat *ns;
1418
1419         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1420
1421         RETURN(&ns->nid);
1422 }
1423
1424 static int
1425 nidstats_compare(void *key, struct hlist_node *hnode)
1426 {
1427         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1428 }
1429
1430 static void *
1431 nidstats_get(struct hlist_node *hnode)
1432 {
1433         struct nid_stat *ns;
1434
1435         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1436         ns->nid_exp_ref_count++;
1437
1438         RETURN(ns);
1439 }
1440
1441 static void *
1442 nidstats_put(struct hlist_node *hnode)
1443 {
1444         struct nid_stat *ns;
1445
1446         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1447         ns->nid_exp_ref_count--;
1448
1449         RETURN(ns);
1450 }
1451
1452 static lustre_hash_ops_t nid_stat_hash_ops = {
1453         .lh_hash    = nid_hash,
1454         .lh_key     = nidstats_key,
1455         .lh_compare = nidstats_compare,
1456         .lh_get     = nidstats_get,
1457         .lh_put     = nidstats_put,
1458 };