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,
 251                  "%p obd_name %s != %s\n", 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_delayed_exports);
 259         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 260         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 261         spin_lock_init(&obd->obd_nid_lock);
 262         spin_lock_init(&obd->obd_dev_lock);
 263         sema_init(&obd->obd_dev_sem, 1);
 264         spin_lock_init(&obd->obd_osfs_lock);
 265         /* obd->obd_osfs_age must be set to a value in the distant
 266          * past to guarantee a fresh statfs is fetched on mount. */
 267         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 268
 269         /* XXX belongs in setup not attach  */
 270         /* recovery data */
 271         cfs_init_timer(&obd->obd_recovery_timer);
 272         spin_lock_init(&obd->obd_processing_task_lock);
 273         cfs_waitq_init(&obd->obd_next_transno_waitq);
 274         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 275         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 276         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 277         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 278
 279         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
 280
 281         len = strlen(uuid);
 282         if (len >= sizeof(obd->obd_uuid)) {
 283                 CERROR("uuid must be < %d bytes long\n",
 284                        (int)sizeof(obd->obd_uuid));
 285                 GOTO(out, rc = -EINVAL);
 286         }
 287         memcpy(obd->obd_uuid.uuid, uuid, len);
 288
 289         /* do the attach */
 290         if (OBP(obd, attach)) {
 291                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 292                 if (rc)
 293                         GOTO(out, rc = -EINVAL);
 294         }
 295
 296         /* Detach drops this */
 297         spin_lock(&obd->obd_dev_lock);
 298         atomic_set(&obd->obd_refcount, 1);
 299         spin_unlock(&obd->obd_dev_lock);
 300         lu_ref_init(&obd->obd_reference);
 301         lu_ref_add(&obd->obd_reference, "attach", obd);
 302
 303         obd->obd_attached = 1;
 304         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 305                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 306         RETURN(0);
 307  out:
 308         if (obd != NULL) {
 309                 class_release_dev(obd);
 310         }
 311         return rc;
 312 }
 313
 314 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 315 {
 316         int err = 0;
 317         struct obd_export *exp;
 318         ENTRY;
 319
 320         LASSERT(obd != NULL);
 321         LASSERTF(obd == class_num2obd(obd->obd_minor),
 322                  "obd %p != obd_devs[%d] %p\n",
 323                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 324         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 325                  "obd %p obd_magic %08x != %08x\n",
 326                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 327
 328         /* have we attached a type to this device? */
 329         if (!obd->obd_attached) {
 330                 CERROR("Device %d not attached\n", obd->obd_minor);
 331                 RETURN(-ENODEV);
 332         }
 333
 334         if (obd->obd_set_up) {
 335                 CERROR("Device %d already setup (type %s)\n",
 336                        obd->obd_minor, obd->obd_type->typ_name);
 337                 RETURN(-EEXIST);
 338         }
 339
 340         /* is someone else setting us up right now? (attach inits spinlock) */
 341         spin_lock(&obd->obd_dev_lock);
 342         if (obd->obd_starting) {
 343                 spin_unlock(&obd->obd_dev_lock);
 344                 CERROR("Device %d setup in progress (type %s)\n",
 345                        obd->obd_minor, obd->obd_type->typ_name);
 346                 RETURN(-EEXIST);
 347         }
 348         /* just leave this on forever.  I can't use obd_set_up here because
 349            other fns check that status, and we're not actually set up yet. */
 350         obd->obd_starting = 1;
 351         obd->obd_uuid_hash = NULL;
 352         obd->obd_nid_hash = NULL;
 353         obd->obd_nid_stats_hash = NULL;
 354         spin_unlock(&obd->obd_dev_lock);
 355
 356         /* create an uuid-export lustre hash */
 357         obd->obd_uuid_hash = lustre_hash_init("UUID_HASH", 7, 7,
 358                                               &uuid_hash_ops, 0);
 359         if (!obd->obd_uuid_hash)
 360                 GOTO(err_hash, err = -ENOMEM);
 361
 362         /* create a nid-export lustre hash */
 363         obd->obd_nid_hash = lustre_hash_init("NID_HASH", 7, 7,
 364                                              &nid_hash_ops, 0);
 365         if (!obd->obd_nid_hash)
 366                 GOTO(err_hash, err = -ENOMEM);
 367
 368         /* create a nid-stats lustre hash */
 369         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS", 7, 7,
 370                                                    &nid_stat_hash_ops, 0);
 371         if (!obd->obd_nid_stats_hash)
 372                 GOTO(err_hash, err = -ENOMEM);
 373
 374         exp = class_new_export(obd, &obd->obd_uuid);
 375         if (IS_ERR(exp))
 376                 GOTO(err_hash, err = PTR_ERR(exp));
 377
 378         obd->obd_self_export = exp;
 379         list_del_init(&exp->exp_obd_chain_timed);
 380         class_export_put(exp);
 381
 382         err = obd_setup(obd, lcfg);
 383         if (err)
 384                 GOTO(err_exp, err);
 385
 386         obd->obd_set_up = 1;
 387
 388         spin_lock(&obd->obd_dev_lock);
 389         /* cleanup drops this */
 390         class_incref(obd, "setup", obd);
 391         spin_unlock(&obd->obd_dev_lock);
 392
 393         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 394                obd->obd_name, obd->obd_uuid.uuid);
 395
 396         RETURN(0);
 397 err_exp:
 398         if (obd->obd_self_export) {
 399                 class_unlink_export(obd->obd_self_export);
 400                 obd->obd_self_export = NULL;
 401         }
 402 err_hash:
 403         if (obd->obd_uuid_hash) {
 404                 lustre_hash_exit(obd->obd_uuid_hash);
 405                 obd->obd_uuid_hash = NULL;
 406         }
 407         if (obd->obd_nid_hash) {
 408                 lustre_hash_exit(obd->obd_nid_hash);
 409                 obd->obd_nid_hash = NULL;
 410         }
 411         if (obd->obd_nid_stats_hash) {
 412                 lustre_hash_exit(obd->obd_nid_stats_hash);
 413                 obd->obd_nid_stats_hash = NULL;
 414         }
 415         obd->obd_starting = 0;
 416         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 417         return err;
 418 }
 419
 420 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 421 {
 422         ENTRY;
 423
 424         if (obd->obd_set_up) {
 425                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 426                 RETURN(-EBUSY);
 427         }
 428
 429         spin_lock(&obd->obd_dev_lock);
 430         if (!obd->obd_attached) {
 431                 spin_unlock(&obd->obd_dev_lock);
 432                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 433                 RETURN(-ENODEV);
 434         }
 435         obd->obd_attached = 0;
 436         spin_unlock(&obd->obd_dev_lock);
 437
 438         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 439                obd->obd_name, obd->obd_uuid.uuid);
 440
 441         class_decref(obd, "attach", obd);
 442
 443         /* not strictly necessary, but cleans up eagerly */
 444         obd_zombie_impexp_cull();
 445
 446         RETURN(0);
 447 }
 448
 449 static void dump_exports(struct obd_device *obd)
 450 {
 451         struct obd_export *exp;
 452
 453         spin_lock(&obd->obd_dev_lock);
 454         list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
 455                 struct ptlrpc_reply_state *rs;
 456                 struct ptlrpc_reply_state *first_reply = NULL;
 457                 int                        nreplies = 0;
 458
 459                 spin_lock(&exp->exp_lock);
 460                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 461                                      rs_exp_list) {
 462                         if (nreplies == 0)
 463                                 first_reply = rs;
 464                         nreplies++;
 465                 }
 466                 spin_unlock(&exp->exp_lock);
 467
 468                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 469                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 470                        obd_export_nid2str(exp),
 471                        atomic_read(&exp->exp_refcount),
 472                        exp->exp_failed, nreplies, first_reply,
 473                        nreplies > 3 ? "..." : "");
 474         }
 475         spin_unlock(&obd->obd_dev_lock);
 476 }
 477
 478 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 479 {
 480         int err = 0;
 481         char *flag;
 482         ENTRY;
 483
 484         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 485
 486         if (!obd->obd_set_up) {
 487                 CERROR("Device %d not setup\n", obd->obd_minor);
 488                 RETURN(-ENODEV);
 489         }
 490
 491         spin_lock(&obd->obd_dev_lock);
 492         if (obd->obd_stopping) {
 493                 spin_unlock(&obd->obd_dev_lock);
 494                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 495                 RETURN(-ENODEV);
 496         }
 497         /* Leave this on forever */
 498         obd->obd_stopping = 1;
 499         spin_unlock(&obd->obd_dev_lock);
 500
 501         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 502                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 503                         switch (*flag) {
 504                         case 'F':
 505                                 obd->obd_force = 1;
 506                                 break;
 507                         case 'A':
 508                                 LCONSOLE_WARN("Failing over %s\n",
 509                                               obd->obd_name);
 510                                 obd->obd_fail = 1;
 511                                 obd->obd_no_transno = 1;
 512                                 obd->obd_no_recov = 1;
 513                                 if (OBP(obd, iocontrol)) {
 514                                         obd_iocontrol(OBD_IOC_SYNC,
 515                                                       obd->obd_self_export,
 516                                                       0, NULL, NULL);
 517                                         /* Set the obd readonly if we can */
 518                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 519                                                       obd->obd_self_export,
 520                                                       0, NULL, NULL);
 521                                 }
 522                                 break;
 523                         default:
 524                                 CERROR("Unrecognised flag '%c'\n", *flag);
 525                         }
 526         }
 527
 528         LASSERT(obd->obd_self_export);
 529
 530         /* The three references that should be remaining are the
 531          * obd_self_export and the attach and setup references. */
 532         if (atomic_read(&obd->obd_refcount) > 3) {
 533                 /* refcounf - 3 might be the number of real exports
 534                    (excluding self export). But class_incref is called
 535                    by other things as well, so don't count on it. */
 536                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 537                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 538                 dump_exports(obd);
 539                 class_disconnect_exports(obd);
 540         }
 541
 542         /* destroy an uuid-export hash body */
 543         if (obd->obd_uuid_hash) {
 544                 lustre_hash_exit(obd->obd_uuid_hash);
 545                 obd->obd_uuid_hash = NULL;
 546         }
 547
 548         /* destroy a nid-export hash body */
 549         if (obd->obd_nid_hash) {
 550                 lustre_hash_exit(obd->obd_nid_hash);
 551                 obd->obd_nid_hash = NULL;
 552         }
 553
 554         /* destroy a nid-stats hash body */
 555         if (obd->obd_nid_stats_hash) {
 556                 lustre_hash_exit(obd->obd_nid_stats_hash);
 557                 obd->obd_nid_stats_hash = NULL;
 558         }
 559
 560         /* Precleanup, we must make sure all exports get destroyed. */
 561         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 562         if (err)
 563                 CERROR("Precleanup %s returned %d\n",
 564                        obd->obd_name, err);
 565         class_decref(obd, "setup", obd);
 566         obd->obd_set_up = 0;
 567         RETURN(0);
 568 }
 569
 570 struct obd_device *class_incref(struct obd_device *obd,
 571                                 const char *scope, const void *source)
 572 {
 573         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 574         atomic_inc(&obd->obd_refcount);
 575         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 576                atomic_read(&obd->obd_refcount));
 577
 578         return obd;
 579 }
 580
 581 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 582 {
 583         int err;
 584         int refs;
 585
 586         spin_lock(&obd->obd_dev_lock);
 587         atomic_dec(&obd->obd_refcount);
 588         refs = atomic_read(&obd->obd_refcount);
 589         spin_unlock(&obd->obd_dev_lock);
 590         lu_ref_del(&obd->obd_reference, scope, source);
 591
 592         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 593
 594         if ((refs == 1) && obd->obd_stopping) {
 595                 /* All exports have been destroyed; there should
 596                    be no more in-progress ops by this point.*/
 597
 598                 spin_lock(&obd->obd_self_export->exp_lock);
 599                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 600                 spin_unlock(&obd->obd_self_export->exp_lock);
 601
 602                 /* note that we'll recurse into class_decref again */
 603                 class_unlink_export(obd->obd_self_export);
 604                 return;
 605         }
 606
 607         if (refs == 0) {
 608                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 609                        obd->obd_name, obd->obd_uuid.uuid);
 610                 LASSERT(!obd->obd_attached);
 611                 if (obd->obd_stopping) {
 612                         /* If we're not stopping, we were never set up */
 613                         err = obd_cleanup(obd);
 614                         if (err)
 615                                 CERROR("Cleanup %s returned %d\n",
 616                                        obd->obd_name, err);
 617                 }
 618                 if (OBP(obd, detach)) {
 619                         err = OBP(obd, detach)(obd);
 620                         if (err)
 621                                 CERROR("Detach returned %d\n", err);
 622                 }
 623                 class_release_dev(obd);
 624         }
 625 }
 626
 627 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 628 {
 629         struct obd_import *imp;
 630         struct obd_uuid uuid;
 631         int rc;
 632         ENTRY;
 633
 634         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 635             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 636                 CERROR("invalid conn_uuid\n");
 637                 RETURN(-EINVAL);
 638         }
 639         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 640             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 641             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 642                 CERROR("can't add connection on non-client dev\n");
 643                 RETURN(-EINVAL);
 644         }
 645
 646         imp = obd->u.cli.cl_import;
 647         if (!imp) {
 648                 CERROR("try to add conn on immature client dev\n");
 649                 RETURN(-EINVAL);
 650         }
 651
 652         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 653         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 654
 655         RETURN(rc);
 656 }
 657
 658 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 659 {
 660         struct obd_import *imp;
 661         struct obd_uuid uuid;
 662         int rc;
 663         ENTRY;
 664
 665         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 666             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 667                 CERROR("invalid conn_uuid\n");
 668                 RETURN(-EINVAL);
 669         }
 670         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 671             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 672                 CERROR("can't del connection on non-client dev\n");
 673                 RETURN(-EINVAL);
 674         }
 675
 676         imp = obd->u.cli.cl_import;
 677         if (!imp) {
 678                 CERROR("try to del conn on immature client dev\n");
 679                 RETURN(-EINVAL);
 680         }
 681
 682         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 683         rc = obd_del_conn(imp, &uuid);
 684
 685         RETURN(rc);
 686 }
 687
 688 CFS_LIST_HEAD(lustre_profile_list);
 689
 690 struct lustre_profile *class_get_profile(const char * prof)
 691 {
 692         struct lustre_profile *lprof;
 693
 694         ENTRY;
 695         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 696                 if (!strcmp(lprof->lp_profile, prof)) {
 697                         RETURN(lprof);
 698                 }
 699         }
 700         RETURN(NULL);
 701 }
 702
 703 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 704                       int mdclen, char *mdc)
 705 {
 706         struct lustre_profile *lprof;
 707         int err = 0;
 708         ENTRY;
 709
 710         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 711
 712         OBD_ALLOC(lprof, sizeof(*lprof));
 713         if (lprof == NULL)
 714                 RETURN(-ENOMEM);
 715         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 716
 717         LASSERT(proflen == (strlen(prof) + 1));
 718         OBD_ALLOC(lprof->lp_profile, proflen);
 719         if (lprof->lp_profile == NULL)
 720                 GOTO(out, err = -ENOMEM);
 721         memcpy(lprof->lp_profile, prof, proflen);
 722
 723         LASSERT(osclen == (strlen(osc) + 1));
 724         OBD_ALLOC(lprof->lp_dt, osclen);
 725         if (lprof->lp_dt == NULL)
 726                 GOTO(out, err = -ENOMEM);
 727         memcpy(lprof->lp_dt, osc, osclen);
 728
 729         if (mdclen > 0) {
 730                 LASSERT(mdclen == (strlen(mdc) + 1));
 731                 OBD_ALLOC(lprof->lp_md, mdclen);
 732                 if (lprof->lp_md == NULL)
 733                         GOTO(out, err = -ENOMEM);
 734                 memcpy(lprof->lp_md, mdc, mdclen);
 735         }
 736
 737         list_add(&lprof->lp_list, &lustre_profile_list);
 738         RETURN(err);
 739
 740 out:
 741         if (lprof->lp_md)
 742                 OBD_FREE(lprof->lp_md, mdclen);
 743         if (lprof->lp_dt)
 744                 OBD_FREE(lprof->lp_dt, osclen);
 745         if (lprof->lp_profile)
 746                 OBD_FREE(lprof->lp_profile, proflen);
 747         OBD_FREE(lprof, sizeof(*lprof));
 748         RETURN(err);
 749 }
 750
 751 void class_del_profile(const char *prof)
 752 {
 753         struct lustre_profile *lprof;
 754         ENTRY;
 755
 756         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 757
 758         lprof = class_get_profile(prof);
 759         if (lprof) {
 760                 list_del(&lprof->lp_list);
 761                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 762                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 763                 if (lprof->lp_md)
 764                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 765                 OBD_FREE(lprof, sizeof *lprof);
 766         }
 767         EXIT;
 768 }
 769
 770 /* COMPAT_146 */
 771 void class_del_profiles(void)
 772 {
 773         struct lustre_profile *lprof, *n;
 774         ENTRY;
 775
 776         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 777                 list_del(&lprof->lp_list);
 778                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 779                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 780                 if (lprof->lp_md)
 781                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 782                 OBD_FREE(lprof, sizeof *lprof);
 783         }
 784         EXIT;
 785 }
 786
 787 /* We can't call ll_process_config directly because it lives in a module that
 788    must be loaded after this one. */
 789 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 790
 791 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 792 {
 793         client_process_config = cpc;
 794 }
 795 EXPORT_SYMBOL(lustre_register_client_process_config);
 796
 797 int class_process_config(struct lustre_cfg *lcfg)
 798 {
 799         struct obd_device *obd;
 800         int err;
 801
 802         LASSERT(lcfg && !IS_ERR(lcfg));
 803         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 804
 805         /* Commands that don't need a device */
 806         switch(lcfg->lcfg_command) {
 807         case LCFG_ATTACH: {
 808                 err = class_attach(lcfg);
 809                 GOTO(out, err);
 810         }
 811         case LCFG_ADD_UUID: {
 812                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 813                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 814                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 815
 816                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 817                 GOTO(out, err);
 818         }
 819         case LCFG_DEL_UUID: {
 820                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 821                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 822                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 823
 824                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 825                 GOTO(out, err);
 826         }
 827         case LCFG_MOUNTOPT: {
 828                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 829                        lustre_cfg_string(lcfg, 1),
 830                        lustre_cfg_string(lcfg, 2),
 831                        lustre_cfg_string(lcfg, 3));
 832                 /* set these mount options somewhere, so ll_fill_super
 833                  * can find them. */
 834                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 835                                         lustre_cfg_string(lcfg, 1),
 836                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 837                                         lustre_cfg_string(lcfg, 2),
 838                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 839                                         lustre_cfg_string(lcfg, 3));
 840                 GOTO(out, err);
 841         }
 842         case LCFG_DEL_MOUNTOPT: {
 843                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 844                        lustre_cfg_string(lcfg, 1));
 845                 class_del_profile(lustre_cfg_string(lcfg, 1));
 846                 GOTO(out, err = 0);
 847         }
 848         case LCFG_SET_TIMEOUT: {
 849                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 850                        obd_timeout, lcfg->lcfg_num);
 851                 obd_timeout = max(lcfg->lcfg_num, 1U);
 852                 GOTO(out, err = 0);
 853         }
 854         case LCFG_SET_LDLM_TIMEOUT: {
 855                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
 856                        ldlm_timeout, lcfg->lcfg_num);
 857                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
 858                 if (ldlm_timeout >= obd_timeout)
 859                         ldlm_timeout = max(obd_timeout / 3, 1U);
 860
 861                 GOTO(out, err = 0);
 862         }
 863         case LCFG_SET_UPCALL: {
 864                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 865                 /* COMPAT_146 Don't fail on old configs */
 866                 GOTO(out, err = 0);
 867         }
 868         case LCFG_MARKER: {
 869                 struct cfg_marker *marker;
 870                 marker = lustre_cfg_buf(lcfg, 1);
 871                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 872                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 873                 GOTO(out, err = 0);
 874         }
 875         case LCFG_PARAM: {
 876                 /* llite has no obd */
 877                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 878                                        PARAM_LLITE, 0) == 0) &&
 879                     client_process_config) {
 880                         err = (*client_process_config)(lcfg);
 881                         GOTO(out, err);
 882                 }
 883                 /* Fall through */
 884                 break;
 885         }
 886         }
 887
 888         /* Commands that require a device */
 889         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 890         if (obd == NULL) {
 891                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 892                         CERROR("this lcfg command requires a device name\n");
 893                 else
 894                         CERROR("no device for: %s\n",
 895                                lustre_cfg_string(lcfg, 0));
 896
 897                 GOTO(out, err = -EINVAL);
 898         }
 899
 900         switch(lcfg->lcfg_command) {
 901         case LCFG_SETUP: {
 902                 err = class_setup(obd, lcfg);
 903                 GOTO(out, err);
 904         }
 905         case LCFG_DETACH: {
 906                 err = class_detach(obd, lcfg);
 907                 GOTO(out, err = 0);
 908         }
 909         case LCFG_CLEANUP: {
 910                 err = class_cleanup(obd, lcfg);
 911                 GOTO(out, err = 0);
 912         }
 913         case LCFG_ADD_CONN: {
 914                 err = class_add_conn(obd, lcfg);
 915                 GOTO(out, err = 0);
 916         }
 917         case LCFG_DEL_CONN: {
 918                 err = class_del_conn(obd, lcfg);
 919                 GOTO(out, err = 0);
 920         }
 921         case LCFG_POOL_NEW: {
 922                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 923                 GOTO(out, err = 0);
 924                 break;
 925         }
 926         case LCFG_POOL_ADD: {
 927                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 928                                    lustre_cfg_string(lcfg, 3));
 929                 GOTO(out, err = 0);
 930                 break;
 931         }
 932         case LCFG_POOL_REM: {
 933                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 934                                    lustre_cfg_string(lcfg, 3));
 935                 GOTO(out, err = 0);
 936                 break;
 937         }
 938         case LCFG_POOL_DEL: {
 939                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 940                 GOTO(out, err = 0);
 941                 break;
 942         }
 943         default: {
 944                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 945                 GOTO(out, err);
 946
 947         }
 948         }
 949 out:
 950         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 951                 CWARN("Ignoring error %d on optional command %#x\n", err,
 952                       lcfg->lcfg_command);
 953                 err = 0;
 954         }
 955         return err;
 956 }
 957
 958 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 959                              struct lustre_cfg *lcfg, void *data)
 960 {
 961 #ifdef __KERNEL__
 962         struct lprocfs_vars *var;
 963         char *key, *sval;
 964         int i, keylen, vallen;
 965         int matched = 0, j = 0;
 966         int rc = 0;
 967         int skip = 0;
 968         ENTRY;
 969
 970         if (lcfg->lcfg_command != LCFG_PARAM) {
 971                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 972                 RETURN(-EINVAL);
 973         }
 974
 975         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 976            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 977            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 978         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 979                 key = lustre_cfg_buf(lcfg, i);
 980                 /* Strip off prefix */
 981                 class_match_param(key, prefix, &key);
 982                 sval = strchr(key, '=');
 983                 if (!sval || (*(sval + 1) == 0)) {
 984                         CERROR("Can't parse param %s (missing '=')\n", key);
 985                         /* rc = -EINVAL; continue parsing other params */
 986                         continue;
 987                 }
 988                 keylen = sval - key;
 989                 sval++;
 990                 vallen = strlen(sval);
 991                 matched = 0;
 992                 j = 0;
 993                 /* Search proc entries */
 994                 while (lvars[j].name) {
 995                         var = &lvars[j];
 996                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
 997                             keylen == strlen(var->name)) {
 998                                 matched++;
 999                                 rc = -EROFS;
1000                                 if (var->write_fptr) {
1001                                         mm_segment_t oldfs;
1002                                         oldfs = get_fs();
1003                                         set_fs(KERNEL_DS);
1004                                         rc = (var->write_fptr)(NULL, sval,
1005                                                                vallen, data);
1006                                         set_fs(oldfs);
1007                                 }
1008                                 break;
1009                         }
1010                         j++;
1011                 }
1012                 if (!matched) {
1013                         /* If the prefix doesn't match, return error so we
1014                            can pass it down the stack */
1015                         if (strnchr(key, keylen, '.'))
1016                             RETURN(-ENOSYS);
1017                         CERROR("%s: unknown param %s\n",
1018                                (char *)lustre_cfg_string(lcfg, 0), key);
1019                         /* rc = -EINVAL;        continue parsing other params */
1020                         skip++;
1021                 } else if (rc < 0) {
1022                         CERROR("writing proc entry %s err %d\n",
1023                                var->name, rc);
1024                         rc = 0;
1025                 } else {
1026                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1027                                       lustre_cfg_string(lcfg, 0),
1028                                       (int)strlen(prefix) - 1, prefix,
1029                                       (int)(sval - key - 1), key, sval);
1030                 }
1031         }
1032
1033         if (rc > 0)
1034                 rc = 0;
1035         if (!rc && skip)
1036                 rc = skip;
1037         RETURN(rc);
1038 #else
1039         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1040         /* Don't throw config error */
1041         RETURN(0);
1042 #endif
1043 }
1044
1045 int class_config_dump_handler(struct llog_handle * handle,
1046                               struct llog_rec_hdr *rec, void *data);
1047
1048 #ifdef __KERNEL__
1049 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1050 #else
1051 #define lustre_check_exclusion(a,b)  0
1052 #endif
1053
1054 static int class_config_llog_handler(struct llog_handle * handle,
1055                                      struct llog_rec_hdr *rec, void *data)
1056 {
1057         struct config_llog_instance *clli = data;
1058         int cfg_len = rec->lrh_len;
1059         char *cfg_buf = (char*) (rec + 1);
1060         int rc = 0;
1061         ENTRY;
1062
1063         //class_config_dump_handler(handle, rec, data);
1064
1065         switch (rec->lrh_type) {
1066         case OBD_CFG_REC: {
1067                 struct lustre_cfg *lcfg, *lcfg_new;
1068                 struct lustre_cfg_bufs bufs;
1069                 char *inst_name = NULL;
1070                 int inst_len = 0;
1071                 int inst = 0, swab = 0;
1072
1073                 lcfg = (struct lustre_cfg *)cfg_buf;
1074                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1075                         lustre_swab_lustre_cfg(lcfg);
1076                         swab = 1;
1077                 }
1078
1079                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1080                 if (rc)
1081                         GOTO(out, rc);
1082
1083                 /* Figure out config state info */
1084                 if (lcfg->lcfg_command == LCFG_MARKER) {
1085                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1086                         lustre_swab_cfg_marker(marker, swab,
1087                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1088                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1089                                clli->cfg_flags, marker->cm_flags);
1090                         if (marker->cm_flags & CM_START) {
1091                                 /* all previous flags off */
1092                                 clli->cfg_flags = CFG_F_MARKER;
1093                                 if (marker->cm_flags & CM_SKIP) {
1094                                         clli->cfg_flags |= CFG_F_SKIP;
1095                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1096                                                marker->cm_step);
1097                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1098                                            (clli->cfg_sb &&
1099                                             lustre_check_exclusion(clli->cfg_sb,
1100                                                          marker->cm_tgtname))) {
1101                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1102                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1103                                                marker->cm_step);
1104                                 }
1105                         } else if (marker->cm_flags & CM_END) {
1106                                 clli->cfg_flags = 0;
1107                         }
1108                 }
1109                 /* A config command without a start marker before it is
1110                    illegal (post 146) */
1111                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1112                     !(clli->cfg_flags & CFG_F_MARKER) &&
1113                     (lcfg->lcfg_command != LCFG_MARKER)) {
1114                         CWARN("Config not inside markers, ignoring! "
1115                               "(inst: %s, uuid: %s, flags: %#x)\n",
1116                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1117                               clli->cfg_uuid.uuid, clli->cfg_flags);
1118                         clli->cfg_flags |= CFG_F_SKIP;
1119                 }
1120                 if (clli->cfg_flags & CFG_F_SKIP) {
1121                         CDEBUG(D_CONFIG, "skipping %#x\n",
1122                                clli->cfg_flags);
1123                         rc = 0;
1124                         /* No processing! */
1125                         break;
1126                 }
1127
1128                 /*
1129                  * For interoperability between 1.8 and 2.0,
1130                  * rename "mds" obd device type to "mdt".
1131                  */
1132                 {
1133                         char *typename = lustre_cfg_string(lcfg, 1);
1134                         char *index = lustre_cfg_string(lcfg, 2);
1135
1136                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1137                              strcmp(typename, "mds") == 0)) {
1138                                 CWARN("For 1.8 interoperability, rename obd "
1139                                        "type from mds to mdt\n");
1140                                 typename[2] = 't';
1141                         }
1142                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1143                              strcmp(index, "type") == 0)) {
1144                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1145                                        "set this index to '0'\n");
1146                                 index[0] = '0';
1147                                 index[1] = 0;
1148                         }
1149                 }
1150
1151                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1152                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1153                         /* Add inactive instead */
1154                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1155
1156                 lustre_cfg_bufs_init(&bufs, lcfg);
1157
1158                 if (clli && clli->cfg_instance &&
1159                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1160                         inst = 1;
1161                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1162                                 strlen(clli->cfg_instance) + 1;
1163                         OBD_ALLOC(inst_name, inst_len);
1164                         if (inst_name == NULL)
1165                                 GOTO(out, rc = -ENOMEM);
1166                         sprintf(inst_name, "%s-%s",
1167                                 lustre_cfg_string(lcfg, 0),
1168                                 clli->cfg_instance);
1169                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1170                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1171                                lcfg->lcfg_command, inst_name);
1172                 }
1173
1174                 /* we override the llog's uuid for clients, to insure they
1175                 are unique */
1176                 if (clli && clli->cfg_instance &&
1177                     lcfg->lcfg_command == LCFG_ATTACH) {
1178                         lustre_cfg_bufs_set_string(&bufs, 2,
1179                                                    clli->cfg_uuid.uuid);
1180                 }
1181                 /*
1182                  * sptlrpc config record, we expect 2 data segments:
1183                  *  [0]: fs_name/target_name,
1184                  *  [1]: rule string
1185                  * moving them to index [1] and [2], and insert MGC's
1186                  * obdname at index [0].
1187                  */
1188                 if (clli && clli->cfg_instance == NULL &&
1189                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1190                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1191                                             bufs.lcfg_buflen[1]);
1192                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1193                                             bufs.lcfg_buflen[0]);
1194                         lustre_cfg_bufs_set_string(&bufs, 0,
1195                                                    clli->cfg_obdname);
1196                 }
1197
1198                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1199
1200                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1201                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1202
1203                 /* XXX Hack to try to remain binary compatible with
1204                  * pre-newconfig logs */
1205                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1206                     (lcfg->lcfg_nid >> 32) == 0) {
1207                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1208
1209                         lcfg_new->lcfg_nid =
1210                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1211                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1212                               lcfg->lcfg_nal, addr,
1213                               libcfs_nid2str(lcfg_new->lcfg_nid));
1214                 } else {
1215                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1216                 }
1217
1218                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1219
1220                 rc = class_process_config(lcfg_new);
1221                 lustre_cfg_free(lcfg_new);
1222
1223                 if (inst)
1224                         OBD_FREE(inst_name, inst_len);
1225                 break;
1226         }
1227         default:
1228                 CERROR("Unknown llog record type %#x encountered\n",
1229                        rec->lrh_type);
1230                 break;
1231         }
1232 out:
1233         if (rc) {
1234                 CERROR("Err %d on cfg command:\n", rc);
1235                 class_config_dump_handler(handle, rec, data);
1236         }
1237         RETURN(rc);
1238 }
1239
1240 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1241                             struct config_llog_instance *cfg)
1242 {
1243         struct llog_process_cat_data cd = {0, 0};
1244         struct llog_handle *llh;
1245         int rc, rc2;
1246         ENTRY;
1247
1248         CDEBUG(D_INFO, "looking up llog %s\n", name);
1249         rc = llog_create(ctxt, &llh, NULL, name);
1250         if (rc)
1251                 RETURN(rc);
1252
1253         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1254         if (rc)
1255                 GOTO(parse_out, rc);
1256
1257         /* continue processing from where we last stopped to end-of-log */
1258         if (cfg)
1259                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1260         cd.lpcd_last_idx = 0;
1261
1262         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1263
1264         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1265                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1266
1267         if (cfg)
1268                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1269
1270 parse_out:
1271         rc2 = llog_close(llh);
1272         if (rc == 0)
1273                 rc = rc2;
1274
1275         RETURN(rc);
1276 }
1277
1278 int class_config_dump_handler(struct llog_handle * handle,
1279                               struct llog_rec_hdr *rec, void *data)
1280 {
1281         int cfg_len = rec->lrh_len;
1282         char *cfg_buf = (char*) (rec + 1);
1283         char *outstr, *ptr, *end;
1284         int rc = 0;
1285         ENTRY;
1286
1287         OBD_ALLOC(outstr, 256);
1288         end = outstr + 256;
1289         ptr = outstr;
1290         if (!outstr) {
1291                 RETURN(-ENOMEM);
1292         }
1293         if (rec->lrh_type == OBD_CFG_REC) {
1294                 struct lustre_cfg *lcfg;
1295                 int i;
1296
1297                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1298                 if (rc)
1299                         GOTO(out, rc);
1300                 lcfg = (struct lustre_cfg *)cfg_buf;
1301
1302                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1303                                 lcfg->lcfg_command);
1304                 if (lcfg->lcfg_flags) {
1305                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1306                                         lcfg->lcfg_flags);
1307                 }
1308                 if (lcfg->lcfg_num) {
1309                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1310                                         lcfg->lcfg_num);
1311                 }
1312                 if (lcfg->lcfg_nid) {
1313                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1314                                         libcfs_nid2str(lcfg->lcfg_nid),
1315                                         lcfg->lcfg_nid);
1316                 }
1317                 if (lcfg->lcfg_command == LCFG_MARKER) {
1318                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1319                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1320                                         marker->cm_step, marker->cm_flags,
1321                                         marker->cm_tgtname, marker->cm_comment);
1322                 } else {
1323                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1324                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1325                                                 lustre_cfg_string(lcfg, i));
1326                         }
1327                 }
1328                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1329         } else {
1330                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1331                 rc = -EINVAL;
1332         }
1333 out:
1334         OBD_FREE(outstr, 256);
1335         RETURN(rc);
1336 }
1337
1338 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1339                            struct config_llog_instance *cfg)
1340 {
1341         struct llog_handle *llh;
1342         int rc, rc2;
1343         ENTRY;
1344
1345         LCONSOLE_INFO("Dumping config log %s\n", name);
1346
1347         rc = llog_create(ctxt, &llh, NULL, name);
1348         if (rc)
1349                 RETURN(rc);
1350
1351         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1352         if (rc)
1353                 GOTO(parse_out, rc);
1354
1355         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1356 parse_out:
1357         rc2 = llog_close(llh);
1358         if (rc == 0)
1359                 rc = rc2;
1360
1361         LCONSOLE_INFO("End config log %s\n", name);
1362         RETURN(rc);
1363
1364 }
1365
1366 /* Cleanup and detach */
1367 int class_manual_cleanup(struct obd_device *obd)
1368 {
1369         char                    flags[3] = "";
1370         struct lustre_cfg      *lcfg;
1371         struct lustre_cfg_bufs  bufs;
1372         int                     rc;
1373         ENTRY;
1374
1375         if (!obd) {
1376                 CERROR("empty cleanup\n");
1377                 RETURN(-EALREADY);
1378         }
1379
1380         if (obd->obd_force)
1381                 strcat(flags, "F");
1382         if (obd->obd_fail)
1383                 strcat(flags, "A");
1384
1385         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1386                obd->obd_name, flags);
1387
1388         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1389         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1390         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1391         if (!lcfg)
1392                 RETURN(-ENOMEM);
1393
1394         rc = class_process_config(lcfg);
1395         if (rc) {
1396                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1397                 GOTO(out, rc);
1398         }
1399
1400         /* the lcfg is almost the same for both ops */
1401         lcfg->lcfg_command = LCFG_DETACH;
1402         rc = class_process_config(lcfg);
1403         if (rc)
1404                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1405 out:
1406         lustre_cfg_free(lcfg);
1407         RETURN(rc);
1408 }
1409
1410 /*
1411  * uuid<->export lustre hash operations
1412  */
1413
1414 static unsigned
1415 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1416 {
1417         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1418                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1419 }
1420
1421 static void *
1422 uuid_key(struct hlist_node *hnode)
1423 {
1424         struct obd_export *exp;
1425
1426         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1427
1428         RETURN(&exp->exp_client_uuid);
1429 }
1430
1431 /*
1432  * NOTE: It is impossible to find an export that is in failed
1433  *       state with this function
1434  */
1435 static int
1436 uuid_compare(void *key, struct hlist_node *hnode)
1437 {
1438         struct obd_export *exp;
1439
1440         LASSERT(key);
1441         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1442
1443         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1444                !exp->exp_failed);
1445 }
1446
1447 static void *
1448 uuid_export_get(struct hlist_node *hnode)
1449 {
1450         struct obd_export *exp;
1451
1452         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1453         class_export_get(exp);
1454
1455         RETURN(exp);
1456 }
1457
1458 static void *
1459 uuid_export_put(struct hlist_node *hnode)
1460 {
1461         struct obd_export *exp;
1462
1463         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1464         class_export_put(exp);
1465
1466         RETURN(exp);
1467 }
1468
1469 static lustre_hash_ops_t uuid_hash_ops = {
1470         .lh_hash    = uuid_hash,
1471         .lh_key     = uuid_key,
1472         .lh_compare = uuid_compare,
1473         .lh_get     = uuid_export_get,
1474         .lh_put     = uuid_export_put,
1475 };
1476
1477
1478 /*
1479  * nid<->export hash operations
1480  */
1481
1482 static unsigned
1483 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1484 {
1485         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1486 }
1487
1488 static void *
1489 nid_key(struct hlist_node *hnode)
1490 {
1491         struct obd_export *exp;
1492
1493         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1494
1495         RETURN(&exp->exp_connection->c_peer.nid);
1496 }
1497
1498 /*
1499  * NOTE: It is impossible to find an export that is in failed
1500  *       state with this function
1501  */
1502 static int
1503 nid_compare(void *key, struct hlist_node *hnode)
1504 {
1505         struct obd_export *exp;
1506
1507         LASSERT(key);
1508         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1509
1510         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1511                !exp->exp_failed);
1512 }
1513
1514 static void *
1515 nid_export_get(struct hlist_node *hnode)
1516 {
1517         struct obd_export *exp;
1518
1519         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1520         class_export_get(exp);
1521
1522         RETURN(exp);
1523 }
1524
1525 static void *
1526 nid_export_put(struct hlist_node *hnode)
1527 {
1528         struct obd_export *exp;
1529
1530         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1531         class_export_put(exp);
1532
1533         RETURN(exp);
1534 }
1535
1536 static lustre_hash_ops_t nid_hash_ops = {
1537         .lh_hash    = nid_hash,
1538         .lh_key     = nid_key,
1539         .lh_compare = nid_compare,
1540         .lh_get     = nid_export_get,
1541         .lh_put     = nid_export_put,
1542 };
1543
1544
1545 /*
1546  * nid<->nidstats hash operations
1547  */
1548
1549 static void *
1550 nidstats_key(struct hlist_node *hnode)
1551 {
1552         struct nid_stat *ns;
1553
1554         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1555
1556         RETURN(&ns->nid);
1557 }
1558
1559 static int
1560 nidstats_compare(void *key, struct hlist_node *hnode)
1561 {
1562         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1563 }
1564
1565 static void *
1566 nidstats_get(struct hlist_node *hnode)
1567 {
1568         struct nid_stat *ns;
1569
1570         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1571         ns->nid_exp_ref_count++;
1572
1573         RETURN(ns);
1574 }
1575
1576 static void *
1577 nidstats_put(struct hlist_node *hnode)
1578 {
1579         struct nid_stat *ns;
1580
1581         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1582         ns->nid_exp_ref_count--;
1583
1584         RETURN(ns);
1585 }
1586
1587 static lustre_hash_ops_t nid_stat_hash_ops = {
1588         .lh_hash    = nid_hash,
1589         .lh_key     = nidstats_key,
1590         .lh_compare = nidstats_compare,
1591         .lh_get     = nidstats_get,
1592         .lh_put     = nidstats_put,
1593 };