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 /**
  80  * Finds a parameter in \a params and copies it to \a copy.
  81  *
  82  * Leading spaces are skipped. Next space or end of string is the
  83  * parameter terminator with the exception that spaces inside single or double
  84  * quotes get included into a parameter. The parameter is copied into \a copy
  85  * which has to be allocated big enough by a caller, quotes are stripped in
  86  * the copy and the copy is terminated by 0.
  87  *
  88  * On return \a params is set to next parameter or to NULL if last
  89  * parameter is returned.
  90  *
  91  * \retval 0 if parameter is returned in \a copy
  92  * \retval 1 otherwise
  93  * \retval -EINVAL if unbalanced quota is found
  94  */
  95 int class_get_next_param(char **params, char *copy)
  96 {
  97         char *q1, *q2, *str;
  98         int len;
  99
 100         str = *params;
 101         while (*str == ' ')
 102                 str++;
 103
 104         if (*str == '\0') {
 105                 *params = NULL;
 106                 return 1;
 107         }
 108
 109         while (1) {
 110                 q1 = strpbrk(str, " '\"");
 111                 if (q1 == NULL) {
 112                         len = strlen(str);
 113                         memcpy(copy, str, len);
 114                         copy[len] = '\0';
 115                         *params = NULL;
 116                         return 0;
 117                 }
 118                 len = q1 - str;
 119                 if (*q1 == ' ') {
 120                         memcpy(copy, str, len);
 121                         copy[len] = '\0';
 122                         *params = str + len;
 123                         return 0;
 124                 }
 125
 126                 memcpy(copy, str, len);
 127                 copy += len;
 128
 129                 /* search for the matching closing quote */
 130                 str = q1 + 1;
 131                 q2 = strchr(str, *q1);
 132                 if (q2 == NULL) {
 133                         CERROR("Unbalanced quota in parameters: \"%s\"\n",
 134                                *params);
 135                         return -EINVAL;
 136                 }
 137                 len = q2 - str;
 138                 memcpy(copy, str, len);
 139                 copy += len;
 140                 str = q2 + 1;
 141         }
 142         return 1;
 143 }
 144
 145 /* returns 0 if this is the first key in the buffer, else 1.
 146    valp points to first char after key. */
 147 int class_match_param(char *buf, char *key, char **valp)
 148 {
 149         if (!buf)
 150                 return 1;
 151
 152         if (memcmp(buf, key, strlen(key)) != 0)
 153                 return 1;
 154
 155         if (valp)
 156                 *valp = buf + strlen(key);
 157
 158         return 0;
 159 }
 160
 161 /* 0 is good nid,
 162    1 not found
 163    < 0 error
 164    endh is set to next separator */
 165 int class_parse_nid(char *buf, lnet_nid_t *nid, char **endh)
 166 {
 167         char tmp, *endp;
 168
 169         if (!buf)
 170                 return 1;
 171         while (*buf == ',' || *buf == ':')
 172                 buf++;
 173         if (*buf == ' ' || *buf == '/' || *buf == '\0')
 174                 return 1;
 175
 176         /* nid separators or end of nids */
 177         endp = strpbrk(buf, ",: /");
 178         if (endp == NULL)
 179                 endp = buf + strlen(buf);
 180
 181         tmp = *endp;
 182         *endp = '\0';
 183         *nid = libcfs_str2nid(buf);
 184         if (*nid == LNET_NID_ANY) {
 185                 LCONSOLE_ERROR_MSG(0x159, "Can't parse NID '%s'\n", buf);
 186                 *endp = tmp;
 187                 return -EINVAL;
 188         }
 189         *endp = tmp;
 190
 191         if (endh)
 192                 *endh = endp;
 193         CDEBUG(D_INFO, "Nid %s\n", libcfs_nid2str(*nid));
 194         return 0;
 195 }
 196
 197 EXPORT_SYMBOL(class_find_param);
 198 EXPORT_SYMBOL(class_get_next_param);
 199 EXPORT_SYMBOL(class_match_param);
 200 EXPORT_SYMBOL(class_parse_nid);
 201
 202 /********************** class fns **********************/
 203
 204 /**
 205  * Create a new device and set the type, name and uuid.  If successful, the new
 206  * device can be accessed by either name or uuid.
 207  */
 208 int class_attach(struct lustre_cfg *lcfg)
 209 {
 210         struct obd_device *obd = NULL;
 211         char *typename, *name, *uuid;
 212         int rc, len;
 213         ENTRY;
 214
 215         if (!LUSTRE_CFG_BUFLEN(lcfg, 1)) {
 216                 CERROR("No type passed!\n");
 217                 RETURN(-EINVAL);
 218         }
 219         typename = lustre_cfg_string(lcfg, 1);
 220
 221         if (!LUSTRE_CFG_BUFLEN(lcfg, 0)) {
 222                 CERROR("No name passed!\n");
 223                 RETURN(-EINVAL);
 224         }
 225         name = lustre_cfg_string(lcfg, 0);
 226
 227         if (!LUSTRE_CFG_BUFLEN(lcfg, 2)) {
 228                 CERROR("No UUID passed!\n");
 229                 RETURN(-EINVAL);
 230         }
 231         uuid = lustre_cfg_string(lcfg, 2);
 232
 233         CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
 234                MKSTR(typename), MKSTR(name), MKSTR(uuid));
 235
 236         obd = class_newdev(typename, name);
 237         if (IS_ERR(obd)) {
 238                 /* Already exists or out of obds */
 239                 rc = PTR_ERR(obd);
 240                 obd = NULL;
 241                 CERROR("Cannot create device %s of type %s : %d\n",
 242                        name, typename, rc);
 243                 GOTO(out, rc);
 244         }
 245         LASSERTF(obd != NULL, "Cannot get obd device %s of type %s\n",
 246                  name, typename);
 247         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 248                  "obd %p obd_magic %08X != %08X\n",
 249                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 250         LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0, "%p obd_name %s != %s\n",
 251                  obd, obd->obd_name, name);
 252
 253         rwlock_init(&obd->obd_pool_lock);
 254         obd->obd_pool_limit = 0;
 255         obd->obd_pool_slv = 0;
 256
 257         CFS_INIT_LIST_HEAD(&obd->obd_exports);
 258         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 259         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 260         spin_lock_init(&obd->obd_nid_lock);
 261         spin_lock_init(&obd->obd_dev_lock);
 262         sema_init(&obd->obd_dev_sem, 1);
 263         spin_lock_init(&obd->obd_osfs_lock);
 264         /* obd->obd_osfs_age must be set to a value in the distant
 265          * past to guarantee a fresh statfs is fetched on mount. */
 266         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 267
 268         /* XXX belongs in setup not attach  */
 269         /* recovery data */
 270         cfs_init_timer(&obd->obd_recovery_timer);
 271         spin_lock_init(&obd->obd_processing_task_lock);
 272         cfs_waitq_init(&obd->obd_next_transno_waitq);
 273         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 274         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 275         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 276         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 277
 278         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
 279
 280         spin_lock_init(&obd->obd_uncommitted_replies_lock);
 281         CFS_INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
 282
 283         len = strlen(uuid);
 284         if (len >= sizeof(obd->obd_uuid)) {
 285                 CERROR("uuid must be < %d bytes long\n",
 286                        (int)sizeof(obd->obd_uuid));
 287                 GOTO(out, rc = -EINVAL);
 288         }
 289         memcpy(obd->obd_uuid.uuid, uuid, len);
 290
 291         /* do the attach */
 292         if (OBP(obd, attach)) {
 293                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 294                 if (rc)
 295                         GOTO(out, rc = -EINVAL);
 296         }
 297
 298         /* Detach drops this */
 299         spin_lock(&obd->obd_dev_lock);
 300         atomic_set(&obd->obd_refcount, 1);
 301         spin_unlock(&obd->obd_dev_lock);
 302         lu_ref_init(&obd->obd_reference);
 303         lu_ref_add(&obd->obd_reference, "attach", obd);
 304
 305         obd->obd_attached = 1;
 306         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 307                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 308         RETURN(0);
 309  out:
 310         if (obd != NULL) {
 311                 class_release_dev(obd);
 312         }
 313         return rc;
 314 }
 315
 316 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 317 {
 318         int err = 0;
 319         struct obd_export *exp;
 320         ENTRY;
 321
 322         LASSERT(obd != NULL);
 323         LASSERTF(obd == class_num2obd(obd->obd_minor),
 324                  "obd %p != obd_devs[%d] %p\n",
 325                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 326         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 327                  "obd %p obd_magic %08x != %08x\n",
 328                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 329
 330         /* have we attached a type to this device? */
 331         if (!obd->obd_attached) {
 332                 CERROR("Device %d not attached\n", obd->obd_minor);
 333                 RETURN(-ENODEV);
 334         }
 335
 336         if (obd->obd_set_up) {
 337                 CERROR("Device %d already setup (type %s)\n",
 338                        obd->obd_minor, obd->obd_type->typ_name);
 339                 RETURN(-EEXIST);
 340         }
 341
 342         /* is someone else setting us up right now? (attach inits spinlock) */
 343         spin_lock(&obd->obd_dev_lock);
 344         if (obd->obd_starting) {
 345                 spin_unlock(&obd->obd_dev_lock);
 346                 CERROR("Device %d setup in progress (type %s)\n",
 347                        obd->obd_minor, obd->obd_type->typ_name);
 348                 RETURN(-EEXIST);
 349         }
 350         /* just leave this on forever.  I can't use obd_set_up here because
 351            other fns check that status, and we're not actually set up yet. */
 352         obd->obd_starting = 1;
 353         obd->obd_uuid_hash = NULL;
 354         obd->obd_nid_hash = NULL;
 355         obd->obd_nid_stats_hash = NULL;
 356         spin_unlock(&obd->obd_dev_lock);
 357
 358         /* create an uuid-export lustre hash */
 359         obd->obd_uuid_hash = lustre_hash_init("UUID_HASH", 7, 7,
 360                                               &uuid_hash_ops, 0);
 361         if (!obd->obd_uuid_hash)
 362                 GOTO(err_hash, err = -ENOMEM);
 363
 364         /* create a nid-export lustre hash */
 365         obd->obd_nid_hash = lustre_hash_init("NID_HASH", 7, 7,
 366                                              &nid_hash_ops, 0);
 367         if (!obd->obd_nid_hash)
 368                 GOTO(err_hash, err = -ENOMEM);
 369
 370         /* create a nid-stats lustre hash */
 371         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS", 7, 7,
 372                                                    &nid_stat_hash_ops, 0);
 373         if (!obd->obd_nid_stats_hash)
 374                 GOTO(err_hash, err = -ENOMEM);
 375
 376         exp = class_new_export(obd, &obd->obd_uuid);
 377         if (IS_ERR(exp))
 378                 GOTO(err_hash, err = PTR_ERR(exp));
 379
 380         obd->obd_self_export = exp;
 381         list_del_init(&exp->exp_obd_chain_timed);
 382         class_export_put(exp);
 383
 384         err = obd_setup(obd, lcfg);
 385         if (err)
 386                 GOTO(err_exp, err);
 387
 388         obd->obd_set_up = 1;
 389
 390         spin_lock(&obd->obd_dev_lock);
 391         /* cleanup drops this */
 392         class_incref(obd, "setup", obd);
 393         spin_unlock(&obd->obd_dev_lock);
 394
 395         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 396                obd->obd_name, obd->obd_uuid.uuid);
 397
 398         RETURN(0);
 399 err_exp:
 400         if (obd->obd_self_export) {
 401                 class_unlink_export(obd->obd_self_export);
 402                 obd->obd_self_export = NULL;
 403         }
 404 err_hash:
 405         if (obd->obd_uuid_hash) {
 406                 lustre_hash_exit(obd->obd_uuid_hash);
 407                 obd->obd_uuid_hash = NULL;
 408         }
 409         if (obd->obd_nid_hash) {
 410                 lustre_hash_exit(obd->obd_nid_hash);
 411                 obd->obd_nid_hash = NULL;
 412         }
 413         if (obd->obd_nid_stats_hash) {
 414                 lustre_hash_exit(obd->obd_nid_stats_hash);
 415                 obd->obd_nid_stats_hash = NULL;
 416         }
 417         obd->obd_starting = 0;
 418         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 419         return err;
 420 }
 421
 422 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 423 {
 424         ENTRY;
 425
 426         if (obd->obd_set_up) {
 427                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 428                 RETURN(-EBUSY);
 429         }
 430
 431         spin_lock(&obd->obd_dev_lock);
 432         if (!obd->obd_attached) {
 433                 spin_unlock(&obd->obd_dev_lock);
 434                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 435                 RETURN(-ENODEV);
 436         }
 437         obd->obd_attached = 0;
 438         spin_unlock(&obd->obd_dev_lock);
 439
 440         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 441                obd->obd_name, obd->obd_uuid.uuid);
 442
 443         class_decref(obd, "attach", obd);
 444
 445         /* not strictly necessary, but cleans up eagerly */
 446         obd_zombie_impexp_cull();
 447
 448         RETURN(0);
 449 }
 450
 451 static void dump_exports(struct obd_device *obd)
 452 {
 453         struct obd_export *exp;
 454
 455         spin_lock(&obd->obd_dev_lock);
 456         list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
 457                 struct ptlrpc_reply_state *rs;
 458                 struct ptlrpc_reply_state *first_reply = NULL;
 459                 int                        nreplies = 0;
 460
 461                 spin_lock(&exp->exp_lock);
 462                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 463                                      rs_exp_list) {
 464                         if (nreplies == 0)
 465                                 first_reply = rs;
 466                         nreplies++;
 467                 }
 468                 spin_unlock(&exp->exp_lock);
 469
 470                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 471                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 472                        obd_export_nid2str(exp),
 473                        atomic_read(&exp->exp_refcount),
 474                        exp->exp_failed, nreplies, first_reply,
 475                        nreplies > 3 ? "..." : "");
 476         }
 477         spin_unlock(&obd->obd_dev_lock);
 478 }
 479
 480 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 481 {
 482         int err = 0;
 483         char *flag;
 484         ENTRY;
 485
 486         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 487
 488         if (!obd->obd_set_up) {
 489                 CERROR("Device %d not setup\n", obd->obd_minor);
 490                 RETURN(-ENODEV);
 491         }
 492
 493         spin_lock(&obd->obd_dev_lock);
 494         if (obd->obd_stopping) {
 495                 spin_unlock(&obd->obd_dev_lock);
 496                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 497                 RETURN(-ENODEV);
 498         }
 499         /* Leave this on forever */
 500         obd->obd_stopping = 1;
 501         spin_unlock(&obd->obd_dev_lock);
 502
 503         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 504                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 505                         switch (*flag) {
 506                         case 'F':
 507                                 obd->obd_force = 1;
 508                                 break;
 509                         case 'A':
 510                                 LCONSOLE_WARN("Failing over %s\n",
 511                                               obd->obd_name);
 512                                 obd->obd_fail = 1;
 513                                 obd->obd_no_transno = 1;
 514                                 obd->obd_no_recov = 1;
 515                                 if (OBP(obd, iocontrol)) {
 516                                         obd_iocontrol(OBD_IOC_SYNC,
 517                                                       obd->obd_self_export,
 518                                                       0, NULL, NULL);
 519                                         /* Set the obd readonly if we can */
 520                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 521                                                       obd->obd_self_export,
 522                                                       0, NULL, NULL);
 523                                 }
 524                                 break;
 525                         default:
 526                                 CERROR("Unrecognised flag '%c'\n", *flag);
 527                         }
 528         }
 529
 530         LASSERT(obd->obd_self_export);
 531
 532         /* The three references that should be remaining are the
 533          * obd_self_export and the attach and setup references. */
 534         if (atomic_read(&obd->obd_refcount) > 3) {
 535                 /* refcounf - 3 might be the number of real exports
 536                    (excluding self export). But class_incref is called
 537                    by other things as well, so don't count on it. */
 538                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 539                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 540                 dump_exports(obd);
 541                 class_disconnect_exports(obd);
 542         }
 543
 544         /* destroy an uuid-export hash body */
 545         if (obd->obd_uuid_hash) {
 546                 lustre_hash_exit(obd->obd_uuid_hash);
 547                 obd->obd_uuid_hash = NULL;
 548         }
 549
 550         /* destroy a nid-export hash body */
 551         if (obd->obd_nid_hash) {
 552                 lustre_hash_exit(obd->obd_nid_hash);
 553                 obd->obd_nid_hash = NULL;
 554         }
 555
 556         /* destroy a nid-stats hash body */
 557         if (obd->obd_nid_stats_hash) {
 558                 lustre_hash_exit(obd->obd_nid_stats_hash);
 559                 obd->obd_nid_stats_hash = NULL;
 560         }
 561
 562         /* Precleanup, we must make sure all exports get destroyed. */
 563         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 564         if (err)
 565                 CERROR("Precleanup %s returned %d\n",
 566                        obd->obd_name, err);
 567         class_decref(obd, "setup", obd);
 568         obd->obd_set_up = 0;
 569         RETURN(0);
 570 }
 571
 572 struct obd_device *class_incref(struct obd_device *obd,
 573                                 const char *scope, const void *source)
 574 {
 575         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 576         atomic_inc(&obd->obd_refcount);
 577         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 578                atomic_read(&obd->obd_refcount));
 579
 580         return obd;
 581 }
 582
 583 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 584 {
 585         int err;
 586         int refs;
 587
 588         spin_lock(&obd->obd_dev_lock);
 589         atomic_dec(&obd->obd_refcount);
 590         refs = atomic_read(&obd->obd_refcount);
 591         spin_unlock(&obd->obd_dev_lock);
 592         lu_ref_del(&obd->obd_reference, scope, source);
 593
 594         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 595
 596         if ((refs == 1) && obd->obd_stopping) {
 597                 /* All exports have been destroyed; there should
 598                    be no more in-progress ops by this point.*/
 599
 600                 spin_lock(&obd->obd_self_export->exp_lock);
 601                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 602                 spin_unlock(&obd->obd_self_export->exp_lock);
 603
 604                 /* note that we'll recurse into class_decref again */
 605                 class_unlink_export(obd->obd_self_export);
 606                 return;
 607         }
 608
 609         if (refs == 0) {
 610                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 611                        obd->obd_name, obd->obd_uuid.uuid);
 612                 LASSERT(!obd->obd_attached);
 613                 if (obd->obd_stopping) {
 614                         /* If we're not stopping, we were never set up */
 615                         err = obd_cleanup(obd);
 616                         if (err)
 617                                 CERROR("Cleanup %s returned %d\n",
 618                                        obd->obd_name, err);
 619                 }
 620                 if (OBP(obd, detach)) {
 621                         err = OBP(obd, detach)(obd);
 622                         if (err)
 623                                 CERROR("Detach returned %d\n", err);
 624                 }
 625                 class_release_dev(obd);
 626         }
 627 }
 628
 629 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 630 {
 631         struct obd_import *imp;
 632         struct obd_uuid uuid;
 633         int rc;
 634         ENTRY;
 635
 636         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 637             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 638                 CERROR("invalid conn_uuid\n");
 639                 RETURN(-EINVAL);
 640         }
 641         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 642             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 643             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 644                 CERROR("can't add connection on non-client dev\n");
 645                 RETURN(-EINVAL);
 646         }
 647
 648         imp = obd->u.cli.cl_import;
 649         if (!imp) {
 650                 CERROR("try to add conn on immature client dev\n");
 651                 RETURN(-EINVAL);
 652         }
 653
 654         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 655         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 656
 657         RETURN(rc);
 658 }
 659
 660 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 661 {
 662         struct obd_import *imp;
 663         struct obd_uuid uuid;
 664         int rc;
 665         ENTRY;
 666
 667         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 668             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 669                 CERROR("invalid conn_uuid\n");
 670                 RETURN(-EINVAL);
 671         }
 672         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 673             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 674                 CERROR("can't del connection on non-client dev\n");
 675                 RETURN(-EINVAL);
 676         }
 677
 678         imp = obd->u.cli.cl_import;
 679         if (!imp) {
 680                 CERROR("try to del conn on immature client dev\n");
 681                 RETURN(-EINVAL);
 682         }
 683
 684         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 685         rc = obd_del_conn(imp, &uuid);
 686
 687         RETURN(rc);
 688 }
 689
 690 CFS_LIST_HEAD(lustre_profile_list);
 691
 692 struct lustre_profile *class_get_profile(const char * prof)
 693 {
 694         struct lustre_profile *lprof;
 695
 696         ENTRY;
 697         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 698                 if (!strcmp(lprof->lp_profile, prof)) {
 699                         RETURN(lprof);
 700                 }
 701         }
 702         RETURN(NULL);
 703 }
 704
 705 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 706                       int mdclen, char *mdc)
 707 {
 708         struct lustre_profile *lprof;
 709         int err = 0;
 710         ENTRY;
 711
 712         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 713
 714         OBD_ALLOC(lprof, sizeof(*lprof));
 715         if (lprof == NULL)
 716                 RETURN(-ENOMEM);
 717         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 718
 719         LASSERT(proflen == (strlen(prof) + 1));
 720         OBD_ALLOC(lprof->lp_profile, proflen);
 721         if (lprof->lp_profile == NULL)
 722                 GOTO(out, err = -ENOMEM);
 723         memcpy(lprof->lp_profile, prof, proflen);
 724
 725         LASSERT(osclen == (strlen(osc) + 1));
 726         OBD_ALLOC(lprof->lp_dt, osclen);
 727         if (lprof->lp_dt == NULL)
 728                 GOTO(out, err = -ENOMEM);
 729         memcpy(lprof->lp_dt, osc, osclen);
 730
 731         if (mdclen > 0) {
 732                 LASSERT(mdclen == (strlen(mdc) + 1));
 733                 OBD_ALLOC(lprof->lp_md, mdclen);
 734                 if (lprof->lp_md == NULL)
 735                         GOTO(out, err = -ENOMEM);
 736                 memcpy(lprof->lp_md, mdc, mdclen);
 737         }
 738
 739         list_add(&lprof->lp_list, &lustre_profile_list);
 740         RETURN(err);
 741
 742 out:
 743         if (lprof->lp_md)
 744                 OBD_FREE(lprof->lp_md, mdclen);
 745         if (lprof->lp_dt)
 746                 OBD_FREE(lprof->lp_dt, osclen);
 747         if (lprof->lp_profile)
 748                 OBD_FREE(lprof->lp_profile, proflen);
 749         OBD_FREE(lprof, sizeof(*lprof));
 750         RETURN(err);
 751 }
 752
 753 void class_del_profile(const char *prof)
 754 {
 755         struct lustre_profile *lprof;
 756         ENTRY;
 757
 758         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 759
 760         lprof = class_get_profile(prof);
 761         if (lprof) {
 762                 list_del(&lprof->lp_list);
 763                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 764                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 765                 if (lprof->lp_md)
 766                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 767                 OBD_FREE(lprof, sizeof *lprof);
 768         }
 769         EXIT;
 770 }
 771
 772 /* COMPAT_146 */
 773 void class_del_profiles(void)
 774 {
 775         struct lustre_profile *lprof, *n;
 776         ENTRY;
 777
 778         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 779                 list_del(&lprof->lp_list);
 780                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 781                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 782                 if (lprof->lp_md)
 783                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 784                 OBD_FREE(lprof, sizeof *lprof);
 785         }
 786         EXIT;
 787 }
 788
 789 /* We can't call ll_process_config directly because it lives in a module that
 790    must be loaded after this one. */
 791 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 792
 793 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 794 {
 795         client_process_config = cpc;
 796 }
 797 EXPORT_SYMBOL(lustre_register_client_process_config);
 798
 799 int class_process_config(struct lustre_cfg *lcfg)
 800 {
 801         struct obd_device *obd;
 802         int err;
 803
 804         LASSERT(lcfg && !IS_ERR(lcfg));
 805         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 806
 807         /* Commands that don't need a device */
 808         switch(lcfg->lcfg_command) {
 809         case LCFG_ATTACH: {
 810                 err = class_attach(lcfg);
 811                 GOTO(out, err);
 812         }
 813         case LCFG_ADD_UUID: {
 814                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 815                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 816                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 817
 818                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 819                 GOTO(out, err);
 820         }
 821         case LCFG_DEL_UUID: {
 822                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 823                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 824                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 825
 826                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 827                 GOTO(out, err);
 828         }
 829         case LCFG_MOUNTOPT: {
 830                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 831                        lustre_cfg_string(lcfg, 1),
 832                        lustre_cfg_string(lcfg, 2),
 833                        lustre_cfg_string(lcfg, 3));
 834                 /* set these mount options somewhere, so ll_fill_super
 835                  * can find them. */
 836                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 837                                         lustre_cfg_string(lcfg, 1),
 838                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 839                                         lustre_cfg_string(lcfg, 2),
 840                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 841                                         lustre_cfg_string(lcfg, 3));
 842                 GOTO(out, err);
 843         }
 844         case LCFG_DEL_MOUNTOPT: {
 845                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 846                        lustre_cfg_string(lcfg, 1));
 847                 class_del_profile(lustre_cfg_string(lcfg, 1));
 848                 GOTO(out, err = 0);
 849         }
 850         case LCFG_SET_TIMEOUT: {
 851                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 852                        obd_timeout, lcfg->lcfg_num);
 853                 obd_timeout = max(lcfg->lcfg_num, 1U);
 854                 GOTO(out, err = 0);
 855         }
 856         case LCFG_SET_UPCALL: {
 857                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 858                 /* COMPAT_146 Don't fail on old configs */
 859                 GOTO(out, err = 0);
 860         }
 861         case LCFG_MARKER: {
 862                 struct cfg_marker *marker;
 863                 marker = lustre_cfg_buf(lcfg, 1);
 864                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 865                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 866                 GOTO(out, err = 0);
 867         }
 868         case LCFG_PARAM: {
 869                 /* llite has no obd */
 870                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 871                                        PARAM_LLITE, 0) == 0) &&
 872                     client_process_config) {
 873                         err = (*client_process_config)(lcfg);
 874                         GOTO(out, err);
 875                 }
 876                 /* Fall through */
 877                 break;
 878         }
 879         }
 880
 881         /* Commands that require a device */
 882         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 883         if (obd == NULL) {
 884                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 885                         CERROR("this lcfg command requires a device name\n");
 886                 else
 887                         CERROR("no device for: %s\n",
 888                                lustre_cfg_string(lcfg, 0));
 889
 890                 GOTO(out, err = -EINVAL);
 891         }
 892
 893         switch(lcfg->lcfg_command) {
 894         case LCFG_SETUP: {
 895                 err = class_setup(obd, lcfg);
 896                 GOTO(out, err);
 897         }
 898         case LCFG_DETACH: {
 899                 err = class_detach(obd, lcfg);
 900                 GOTO(out, err = 0);
 901         }
 902         case LCFG_CLEANUP: {
 903                 err = class_cleanup(obd, lcfg);
 904                 GOTO(out, err = 0);
 905         }
 906         case LCFG_ADD_CONN: {
 907                 err = class_add_conn(obd, lcfg);
 908                 GOTO(out, err = 0);
 909         }
 910         case LCFG_DEL_CONN: {
 911                 err = class_del_conn(obd, lcfg);
 912                 GOTO(out, err = 0);
 913         }
 914         case LCFG_POOL_NEW: {
 915                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 916                 GOTO(out, err = 0);
 917                 break;
 918         }
 919         case LCFG_POOL_ADD: {
 920                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 921                                    lustre_cfg_string(lcfg, 3));
 922                 GOTO(out, err = 0);
 923                 break;
 924         }
 925         case LCFG_POOL_REM: {
 926                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 927                                    lustre_cfg_string(lcfg, 3));
 928                 GOTO(out, err = 0);
 929                 break;
 930         }
 931         case LCFG_POOL_DEL: {
 932                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 933                 GOTO(out, err = 0);
 934                 break;
 935         }
 936         default: {
 937                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 938                 GOTO(out, err);
 939
 940         }
 941         }
 942 out:
 943         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 944                 CWARN("Ignoring error %d on optional command %#x\n", err,
 945                       lcfg->lcfg_command);
 946                 err = 0;
 947         }
 948         return err;
 949 }
 950
 951 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 952                              struct lustre_cfg *lcfg, void *data)
 953 {
 954 #ifdef __KERNEL__
 955         struct lprocfs_vars *var;
 956         char *key, *sval;
 957         int i, keylen, vallen;
 958         int matched = 0, j = 0;
 959         int rc = 0;
 960         int skip = 0;
 961         ENTRY;
 962
 963         if (lcfg->lcfg_command != LCFG_PARAM) {
 964                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 965                 RETURN(-EINVAL);
 966         }
 967
 968         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 969            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 970            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 971         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 972                 key = lustre_cfg_buf(lcfg, i);
 973                 /* Strip off prefix */
 974                 class_match_param(key, prefix, &key);
 975                 sval = strchr(key, '=');
 976                 if (!sval || (*(sval + 1) == 0)) {
 977                         CERROR("Can't parse param %s (missing '=')\n", key);
 978                         /* rc = -EINVAL; continue parsing other params */
 979                         continue;
 980                 }
 981                 keylen = sval - key;
 982                 sval++;
 983                 vallen = strlen(sval);
 984                 matched = 0;
 985                 j = 0;
 986                 /* Search proc entries */
 987                 while (lvars[j].name) {
 988                         var = &lvars[j];
 989                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 990                             keylen == strlen(var->name)) {
 991                                 matched++;
 992                                 rc = -EROFS;
 993                                 if (var->write_fptr) {
 994                                         mm_segment_t oldfs;
 995                                         oldfs = get_fs();
 996                                         set_fs(KERNEL_DS);
 997                                         rc = (var->write_fptr)(NULL, sval,
 998                                                                vallen, data);
 999                                         set_fs(oldfs);
1000                                 }
1001                                 break;
1002                         }
1003                         j++;
1004                 }
1005                 if (!matched) {
1006                         /* If the prefix doesn't match, return error so we
1007                            can pass it down the stack */
1008                         if (strnchr(key, keylen, '.'))
1009                             RETURN(-ENOSYS);
1010                         CERROR("%s: unknown param %s\n",
1011                                (char *)lustre_cfg_string(lcfg, 0), key);
1012                         /* rc = -EINVAL;        continue parsing other params */
1013                         skip++;
1014                 } else if (rc < 0) {
1015                         CERROR("writing proc entry %s err %d\n",
1016                                var->name, rc);
1017                         rc = 0;
1018                 } else {
1019                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1020                                       lustre_cfg_string(lcfg, 0),
1021                                       (int)strlen(prefix) - 1, prefix,
1022                                       (int)(sval - key - 1), key, sval);
1023                 }
1024         }
1025
1026         if (rc > 0)
1027                 rc = 0;
1028         if (!rc && skip)
1029                 rc = skip;
1030         RETURN(rc);
1031 #else
1032         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1033         /* Don't throw config error */
1034         RETURN(0);
1035 #endif
1036 }
1037
1038 int class_config_dump_handler(struct llog_handle * handle,
1039                               struct llog_rec_hdr *rec, void *data);
1040
1041 #ifdef __KERNEL__
1042 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1043 #else
1044 #define lustre_check_exclusion(a,b)  0
1045 #endif
1046
1047 static int class_config_llog_handler(struct llog_handle * handle,
1048                                      struct llog_rec_hdr *rec, void *data)
1049 {
1050         struct config_llog_instance *clli = data;
1051         int cfg_len = rec->lrh_len;
1052         char *cfg_buf = (char*) (rec + 1);
1053         int rc = 0;
1054         ENTRY;
1055
1056         //class_config_dump_handler(handle, rec, data);
1057
1058         switch (rec->lrh_type) {
1059         case OBD_CFG_REC: {
1060                 struct lustre_cfg *lcfg, *lcfg_new;
1061                 struct lustre_cfg_bufs bufs;
1062                 char *inst_name = NULL;
1063                 int inst_len = 0;
1064                 int inst = 0, swab = 0;
1065
1066                 lcfg = (struct lustre_cfg *)cfg_buf;
1067                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1068                         lustre_swab_lustre_cfg(lcfg);
1069                         swab = 1;
1070                 }
1071
1072                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1073                 if (rc)
1074                         GOTO(out, rc);
1075
1076                 /* Figure out config state info */
1077                 if (lcfg->lcfg_command == LCFG_MARKER) {
1078                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1079                         lustre_swab_cfg_marker(marker, swab,
1080                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1081                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1082                                clli->cfg_flags, marker->cm_flags);
1083                         if (marker->cm_flags & CM_START) {
1084                                 /* all previous flags off */
1085                                 clli->cfg_flags = CFG_F_MARKER;
1086                                 if (marker->cm_flags & CM_SKIP) {
1087                                         clli->cfg_flags |= CFG_F_SKIP;
1088                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1089                                                marker->cm_step);
1090                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1091                                            (clli->cfg_sb &&
1092                                             lustre_check_exclusion(clli->cfg_sb,
1093                                                          marker->cm_tgtname))) {
1094                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1095                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1096                                                marker->cm_step);
1097                                 }
1098                         } else if (marker->cm_flags & CM_END) {
1099                                 clli->cfg_flags = 0;
1100                         }
1101                 }
1102                 /* A config command without a start marker before it is
1103                    illegal (post 146) */
1104                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1105                     !(clli->cfg_flags & CFG_F_MARKER) &&
1106                     (lcfg->lcfg_command != LCFG_MARKER)) {
1107                         CWARN("Config not inside markers, ignoring! "
1108                               "(inst: %s, uuid: %s, flags: %#x)\n",
1109                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1110                               clli->cfg_uuid.uuid, clli->cfg_flags);
1111                         clli->cfg_flags |= CFG_F_SKIP;
1112                 }
1113                 if (clli->cfg_flags & CFG_F_SKIP) {
1114                         CDEBUG(D_CONFIG, "skipping %#x\n",
1115                                clli->cfg_flags);
1116                         rc = 0;
1117                         /* No processing! */
1118                         break;
1119                 }
1120
1121                 /*
1122                  * For interoperability between 1.8 and 2.0,
1123                  * rename "mds" obd device type to "mdt".
1124                  */
1125                 {
1126                         char *typename = lustre_cfg_string(lcfg, 1);
1127                         char *index = lustre_cfg_string(lcfg, 2);
1128
1129                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1130                              strcmp(typename, "mds") == 0)) {
1131                                 CWARN("For 1.8 interoperability, rename obd "
1132                                        "type from mds to mdt\n");
1133                                 typename[2] = 't';
1134                         }
1135                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1136                              strcmp(index, "type") == 0)) {
1137                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1138                                        "set this index to '0'\n");
1139                                 index[0] = '0';
1140                                 index[1] = 0;
1141                         }
1142                 }
1143
1144                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1145                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1146                         /* Add inactive instead */
1147                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1148
1149                 lustre_cfg_bufs_init(&bufs, lcfg);
1150
1151                 if (clli && clli->cfg_instance &&
1152                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1153                         inst = 1;
1154                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1155                                 strlen(clli->cfg_instance) + 1;
1156                         OBD_ALLOC(inst_name, inst_len);
1157                         if (inst_name == NULL)
1158                                 GOTO(out, rc = -ENOMEM);
1159                         sprintf(inst_name, "%s-%s",
1160                                 lustre_cfg_string(lcfg, 0),
1161                                 clli->cfg_instance);
1162                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1163                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1164                                lcfg->lcfg_command, inst_name);
1165                 }
1166
1167                 /* we override the llog's uuid for clients, to insure they
1168                 are unique */
1169                 if (clli && clli->cfg_instance &&
1170                     lcfg->lcfg_command == LCFG_ATTACH) {
1171                         lustre_cfg_bufs_set_string(&bufs, 2,
1172                                                    clli->cfg_uuid.uuid);
1173                 }
1174                 /*
1175                  * sptlrpc config record, we expect 2 data segments:
1176                  *  [0]: fs_name/target_name,
1177                  *  [1]: rule string
1178                  * moving them to index [1] and [2], and insert MGC's
1179                  * obdname at index [0].
1180                  */
1181                 if (clli && clli->cfg_instance == NULL &&
1182                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1183                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1184                                             bufs.lcfg_buflen[1]);
1185                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1186                                             bufs.lcfg_buflen[0]);
1187                         lustre_cfg_bufs_set_string(&bufs, 0,
1188                                                    clli->cfg_obdname);
1189                 }
1190
1191                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1192
1193                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1194                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1195
1196                 /* XXX Hack to try to remain binary compatible with
1197                  * pre-newconfig logs */
1198                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1199                     (lcfg->lcfg_nid >> 32) == 0) {
1200                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1201
1202                         lcfg_new->lcfg_nid =
1203                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1204                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1205                               lcfg->lcfg_nal, addr,
1206                               libcfs_nid2str(lcfg_new->lcfg_nid));
1207                 } else {
1208                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1209                 }
1210
1211                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1212
1213                 rc = class_process_config(lcfg_new);
1214                 lustre_cfg_free(lcfg_new);
1215
1216                 if (inst)
1217                         OBD_FREE(inst_name, inst_len);
1218                 break;
1219         }
1220         default:
1221                 CERROR("Unknown llog record type %#x encountered\n",
1222                        rec->lrh_type);
1223                 break;
1224         }
1225 out:
1226         if (rc) {
1227                 CERROR("Err %d on cfg command:\n", rc);
1228                 class_config_dump_handler(handle, rec, data);
1229         }
1230         RETURN(rc);
1231 }
1232
1233 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1234                             struct config_llog_instance *cfg)
1235 {
1236         struct llog_process_cat_data cd = {0, 0};
1237         struct llog_handle *llh;
1238         int rc, rc2;
1239         ENTRY;
1240
1241         CDEBUG(D_INFO, "looking up llog %s\n", name);
1242         rc = llog_create(ctxt, &llh, NULL, name);
1243         if (rc)
1244                 RETURN(rc);
1245
1246         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1247         if (rc)
1248                 GOTO(parse_out, rc);
1249
1250         /* continue processing from where we last stopped to end-of-log */
1251         if (cfg)
1252                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1253         cd.lpcd_last_idx = 0;
1254
1255         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1256
1257         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1258                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1259
1260         if (cfg)
1261                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1262
1263 parse_out:
1264         rc2 = llog_close(llh);
1265         if (rc == 0)
1266                 rc = rc2;
1267
1268         RETURN(rc);
1269 }
1270
1271 int class_config_dump_handler(struct llog_handle * handle,
1272                               struct llog_rec_hdr *rec, void *data)
1273 {
1274         int cfg_len = rec->lrh_len;
1275         char *cfg_buf = (char*) (rec + 1);
1276         char *outstr, *ptr, *end;
1277         int rc = 0;
1278         ENTRY;
1279
1280         OBD_ALLOC(outstr, 256);
1281         end = outstr + 256;
1282         ptr = outstr;
1283         if (!outstr) {
1284                 RETURN(-ENOMEM);
1285         }
1286         if (rec->lrh_type == OBD_CFG_REC) {
1287                 struct lustre_cfg *lcfg;
1288                 int i;
1289
1290                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1291                 if (rc)
1292                         GOTO(out, rc);
1293                 lcfg = (struct lustre_cfg *)cfg_buf;
1294
1295                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1296                                 lcfg->lcfg_command);
1297                 if (lcfg->lcfg_flags) {
1298                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1299                                         lcfg->lcfg_flags);
1300                 }
1301                 if (lcfg->lcfg_num) {
1302                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1303                                         lcfg->lcfg_num);
1304                 }
1305                 if (lcfg->lcfg_nid) {
1306                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1307                                         libcfs_nid2str(lcfg->lcfg_nid),
1308                                         lcfg->lcfg_nid);
1309                 }
1310                 if (lcfg->lcfg_command == LCFG_MARKER) {
1311                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1312                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1313                                         marker->cm_step, marker->cm_flags,
1314                                         marker->cm_tgtname, marker->cm_comment);
1315                 } else {
1316                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1317                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1318                                                 lustre_cfg_string(lcfg, i));
1319                         }
1320                 }
1321                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1322         } else {
1323                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1324                 rc = -EINVAL;
1325         }
1326 out:
1327         OBD_FREE(outstr, 256);
1328         RETURN(rc);
1329 }
1330
1331 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1332                            struct config_llog_instance *cfg)
1333 {
1334         struct llog_handle *llh;
1335         int rc, rc2;
1336         ENTRY;
1337
1338         LCONSOLE_INFO("Dumping config log %s\n", name);
1339
1340         rc = llog_create(ctxt, &llh, NULL, name);
1341         if (rc)
1342                 RETURN(rc);
1343
1344         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1345         if (rc)
1346                 GOTO(parse_out, rc);
1347
1348         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1349 parse_out:
1350         rc2 = llog_close(llh);
1351         if (rc == 0)
1352                 rc = rc2;
1353
1354         LCONSOLE_INFO("End config log %s\n", name);
1355         RETURN(rc);
1356
1357 }
1358
1359 /* Cleanup and detach */
1360 int class_manual_cleanup(struct obd_device *obd)
1361 {
1362         char                    flags[3] = "";
1363         struct lustre_cfg      *lcfg;
1364         struct lustre_cfg_bufs  bufs;
1365         int                     rc;
1366         ENTRY;
1367
1368         if (!obd) {
1369                 CERROR("empty cleanup\n");
1370                 RETURN(-EALREADY);
1371         }
1372
1373         if (obd->obd_force)
1374                 strcat(flags, "F");
1375         if (obd->obd_fail)
1376                 strcat(flags, "A");
1377
1378         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1379                obd->obd_name, flags);
1380
1381         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1382         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1383         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1384         if (!lcfg)
1385                 RETURN(-ENOMEM);
1386
1387         rc = class_process_config(lcfg);
1388         if (rc) {
1389                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1390                 GOTO(out, rc);
1391         }
1392
1393         /* the lcfg is almost the same for both ops */
1394         lcfg->lcfg_command = LCFG_DETACH;
1395         rc = class_process_config(lcfg);
1396         if (rc)
1397                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1398 out:
1399         lustre_cfg_free(lcfg);
1400         RETURN(rc);
1401 }
1402
1403 /*
1404  * uuid<->export lustre hash operations
1405  */
1406
1407 static unsigned
1408 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1409 {
1410         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1411                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1412 }
1413
1414 static void *
1415 uuid_key(struct hlist_node *hnode)
1416 {
1417         struct obd_export *exp;
1418
1419         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1420
1421         RETURN(&exp->exp_client_uuid);
1422 }
1423
1424 /*
1425  * NOTE: It is impossible to find an export that is in failed
1426  *       state with this function
1427  */
1428 static int
1429 uuid_compare(void *key, struct hlist_node *hnode)
1430 {
1431         struct obd_export *exp;
1432
1433         LASSERT(key);
1434         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1435
1436         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1437                !exp->exp_failed);
1438 }
1439
1440 static void *
1441 uuid_export_get(struct hlist_node *hnode)
1442 {
1443         struct obd_export *exp;
1444
1445         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1446         class_export_get(exp);
1447
1448         RETURN(exp);
1449 }
1450
1451 static void *
1452 uuid_export_put(struct hlist_node *hnode)
1453 {
1454         struct obd_export *exp;
1455
1456         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1457         class_export_put(exp);
1458
1459         RETURN(exp);
1460 }
1461
1462 static lustre_hash_ops_t uuid_hash_ops = {
1463         .lh_hash    = uuid_hash,
1464         .lh_key     = uuid_key,
1465         .lh_compare = uuid_compare,
1466         .lh_get     = uuid_export_get,
1467         .lh_put     = uuid_export_put,
1468 };
1469
1470
1471 /*
1472  * nid<->export hash operations
1473  */
1474
1475 static unsigned
1476 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1477 {
1478         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1479 }
1480
1481 static void *
1482 nid_key(struct hlist_node *hnode)
1483 {
1484         struct obd_export *exp;
1485
1486         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1487
1488         RETURN(&exp->exp_connection->c_peer.nid);
1489 }
1490
1491 /*
1492  * NOTE: It is impossible to find an export that is in failed
1493  *       state with this function
1494  */
1495 static int
1496 nid_compare(void *key, struct hlist_node *hnode)
1497 {
1498         struct obd_export *exp;
1499
1500         LASSERT(key);
1501         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1502
1503         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1504                !exp->exp_failed);
1505 }
1506
1507 static void *
1508 nid_export_get(struct hlist_node *hnode)
1509 {
1510         struct obd_export *exp;
1511
1512         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1513         class_export_get(exp);
1514
1515         RETURN(exp);
1516 }
1517
1518 static void *
1519 nid_export_put(struct hlist_node *hnode)
1520 {
1521         struct obd_export *exp;
1522
1523         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1524         class_export_put(exp);
1525
1526         RETURN(exp);
1527 }
1528
1529 static lustre_hash_ops_t nid_hash_ops = {
1530         .lh_hash    = nid_hash,
1531         .lh_key     = nid_key,
1532         .lh_compare = nid_compare,
1533         .lh_get     = nid_export_get,
1534         .lh_put     = nid_export_put,
1535 };
1536
1537
1538 /*
1539  * nid<->nidstats hash operations
1540  */
1541
1542 static void *
1543 nidstats_key(struct hlist_node *hnode)
1544 {
1545         struct nid_stat *ns;
1546
1547         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1548
1549         RETURN(&ns->nid);
1550 }
1551
1552 static int
1553 nidstats_compare(void *key, struct hlist_node *hnode)
1554 {
1555         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1556 }
1557
1558 static void *
1559 nidstats_get(struct hlist_node *hnode)
1560 {
1561         struct nid_stat *ns;
1562
1563         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1564         ns->nid_exp_ref_count++;
1565
1566         RETURN(ns);
1567 }
1568
1569 static void *
1570 nidstats_put(struct hlist_node *hnode)
1571 {
1572         struct nid_stat *ns;
1573
1574         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1575         ns->nid_exp_ref_count--;
1576
1577         RETURN(ns);
1578 }
1579
1580 static lustre_hash_ops_t nid_stat_hash_ops = {
1581         .lh_hash    = nid_hash,
1582         .lh_key     = nidstats_key,
1583         .lh_compare = nidstats_compare,
1584         .lh_get     = nidstats_get,
1585         .lh_put     = nidstats_put,
1586 };