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",
 358                                               HASH_UUID_CUR_BITS,
 359                                               HASH_UUID_MAX_BITS,
 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",
 366                                              HASH_NID_CUR_BITS,
 367                                              HASH_NID_MAX_BITS,
 368                                              &nid_hash_ops, 0);
 369         if (!obd->obd_nid_hash)
 370                 GOTO(err_hash, err = -ENOMEM);
 371
 372         /* create a nid-stats lustre hash */
 373         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS",
 374                                                    HASH_NID_STATS_CUR_BITS,
 375                                                    HASH_NID_STATS_MAX_BITS,
 376                                                    &nid_stat_hash_ops, 0);
 377         if (!obd->obd_nid_stats_hash)
 378                 GOTO(err_hash, err = -ENOMEM);
 379
 380         exp = class_new_export(obd, &obd->obd_uuid);
 381         if (IS_ERR(exp))
 382                 GOTO(err_hash, err = PTR_ERR(exp));
 383
 384         obd->obd_self_export = exp;
 385         list_del_init(&exp->exp_obd_chain_timed);
 386         class_export_put(exp);
 387
 388         err = obd_setup(obd, lcfg);
 389         if (err)
 390                 GOTO(err_exp, err);
 391
 392         obd->obd_set_up = 1;
 393
 394         spin_lock(&obd->obd_dev_lock);
 395         /* cleanup drops this */
 396         class_incref(obd, "setup", obd);
 397         spin_unlock(&obd->obd_dev_lock);
 398
 399         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 400                obd->obd_name, obd->obd_uuid.uuid);
 401
 402         RETURN(0);
 403 err_exp:
 404         if (obd->obd_self_export) {
 405                 class_unlink_export(obd->obd_self_export);
 406                 obd->obd_self_export = NULL;
 407         }
 408 err_hash:
 409         if (obd->obd_uuid_hash) {
 410                 lustre_hash_exit(obd->obd_uuid_hash);
 411                 obd->obd_uuid_hash = NULL;
 412         }
 413         if (obd->obd_nid_hash) {
 414                 lustre_hash_exit(obd->obd_nid_hash);
 415                 obd->obd_nid_hash = NULL;
 416         }
 417         if (obd->obd_nid_stats_hash) {
 418                 lustre_hash_exit(obd->obd_nid_stats_hash);
 419                 obd->obd_nid_stats_hash = NULL;
 420         }
 421         obd->obd_starting = 0;
 422         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 423         return err;
 424 }
 425
 426 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 427 {
 428         ENTRY;
 429
 430         if (obd->obd_set_up) {
 431                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 432                 RETURN(-EBUSY);
 433         }
 434
 435         spin_lock(&obd->obd_dev_lock);
 436         if (!obd->obd_attached) {
 437                 spin_unlock(&obd->obd_dev_lock);
 438                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 439                 RETURN(-ENODEV);
 440         }
 441         obd->obd_attached = 0;
 442         spin_unlock(&obd->obd_dev_lock);
 443
 444         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 445                obd->obd_name, obd->obd_uuid.uuid);
 446
 447         class_decref(obd, "attach", obd);
 448
 449         /* not strictly necessary, but cleans up eagerly */
 450         obd_zombie_impexp_cull();
 451
 452         RETURN(0);
 453 }
 454
 455 static void dump_exports(struct obd_device *obd)
 456 {
 457         struct obd_export *exp;
 458
 459         spin_lock(&obd->obd_dev_lock);
 460         list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain) {
 461                 struct ptlrpc_reply_state *rs;
 462                 struct ptlrpc_reply_state *first_reply = NULL;
 463                 int                        nreplies = 0;
 464
 465                 spin_lock(&exp->exp_lock);
 466                 list_for_each_entry (rs, &exp->exp_outstanding_replies,
 467                                      rs_exp_list) {
 468                         if (nreplies == 0)
 469                                 first_reply = rs;
 470                         nreplies++;
 471                 }
 472                 spin_unlock(&exp->exp_lock);
 473
 474                 CDEBUG(D_IOCTL, "%s: %p %s %s %d %d %d: %p %s\n",
 475                        obd->obd_name, exp, exp->exp_client_uuid.uuid,
 476                        obd_export_nid2str(exp),
 477                        atomic_read(&exp->exp_refcount),
 478                        exp->exp_failed, nreplies, first_reply,
 479                        nreplies > 3 ? "..." : "");
 480         }
 481         spin_unlock(&obd->obd_dev_lock);
 482 }
 483
 484 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 485 {
 486         int err = 0;
 487         char *flag;
 488         ENTRY;
 489
 490         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 491
 492         if (!obd->obd_set_up) {
 493                 CERROR("Device %d not setup\n", obd->obd_minor);
 494                 RETURN(-ENODEV);
 495         }
 496
 497         spin_lock(&obd->obd_dev_lock);
 498         if (obd->obd_stopping) {
 499                 spin_unlock(&obd->obd_dev_lock);
 500                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 501                 RETURN(-ENODEV);
 502         }
 503         /* Leave this on forever */
 504         obd->obd_stopping = 1;
 505         spin_unlock(&obd->obd_dev_lock);
 506
 507         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 508                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 509                         switch (*flag) {
 510                         case 'F':
 511                                 obd->obd_force = 1;
 512                                 break;
 513                         case 'A':
 514                                 LCONSOLE_WARN("Failing over %s\n",
 515                                               obd->obd_name);
 516                                 obd->obd_fail = 1;
 517                                 obd->obd_no_transno = 1;
 518                                 obd->obd_no_recov = 1;
 519                                 if (OBP(obd, iocontrol)) {
 520                                         obd_iocontrol(OBD_IOC_SYNC,
 521                                                       obd->obd_self_export,
 522                                                       0, NULL, NULL);
 523                                         /* Set the obd readonly if we can */
 524                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 525                                                       obd->obd_self_export,
 526                                                       0, NULL, NULL);
 527                                 }
 528                                 break;
 529                         default:
 530                                 CERROR("Unrecognised flag '%c'\n", *flag);
 531                         }
 532         }
 533
 534         LASSERT(obd->obd_self_export);
 535
 536         /* The three references that should be remaining are the
 537          * obd_self_export and the attach and setup references. */
 538         if (atomic_read(&obd->obd_refcount) > 3) {
 539                 /* refcounf - 3 might be the number of real exports
 540                    (excluding self export). But class_incref is called
 541                    by other things as well, so don't count on it. */
 542                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 543                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 544                 dump_exports(obd);
 545                 class_disconnect_exports(obd);
 546         }
 547
 548         /* destroy an uuid-export hash body */
 549         if (obd->obd_uuid_hash) {
 550                 lustre_hash_exit(obd->obd_uuid_hash);
 551                 obd->obd_uuid_hash = NULL;
 552         }
 553
 554         /* destroy a nid-export hash body */
 555         if (obd->obd_nid_hash) {
 556                 lustre_hash_exit(obd->obd_nid_hash);
 557                 obd->obd_nid_hash = NULL;
 558         }
 559
 560         /* destroy a nid-stats hash body */
 561         if (obd->obd_nid_stats_hash) {
 562                 lustre_hash_exit(obd->obd_nid_stats_hash);
 563                 obd->obd_nid_stats_hash = NULL;
 564         }
 565
 566         /* Precleanup, we must make sure all exports get destroyed. */
 567         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 568         if (err)
 569                 CERROR("Precleanup %s returned %d\n",
 570                        obd->obd_name, err);
 571         class_decref(obd, "setup", obd);
 572         obd->obd_set_up = 0;
 573         RETURN(0);
 574 }
 575
 576 struct obd_device *class_incref(struct obd_device *obd,
 577                                 const char *scope, const void *source)
 578 {
 579         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 580         atomic_inc(&obd->obd_refcount);
 581         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 582                atomic_read(&obd->obd_refcount));
 583
 584         return obd;
 585 }
 586
 587 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 588 {
 589         int err;
 590         int refs;
 591
 592         spin_lock(&obd->obd_dev_lock);
 593         atomic_dec(&obd->obd_refcount);
 594         refs = atomic_read(&obd->obd_refcount);
 595         spin_unlock(&obd->obd_dev_lock);
 596         lu_ref_del(&obd->obd_reference, scope, source);
 597
 598         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 599
 600         if ((refs == 1) && obd->obd_stopping) {
 601                 /* All exports have been destroyed; there should
 602                    be no more in-progress ops by this point.*/
 603
 604                 spin_lock(&obd->obd_self_export->exp_lock);
 605                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 606                 spin_unlock(&obd->obd_self_export->exp_lock);
 607
 608                 /* note that we'll recurse into class_decref again */
 609                 class_unlink_export(obd->obd_self_export);
 610                 return;
 611         }
 612
 613         if (refs == 0) {
 614                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 615                        obd->obd_name, obd->obd_uuid.uuid);
 616                 LASSERT(!obd->obd_attached);
 617                 if (obd->obd_stopping) {
 618                         /* If we're not stopping, we were never set up */
 619                         err = obd_cleanup(obd);
 620                         if (err)
 621                                 CERROR("Cleanup %s returned %d\n",
 622                                        obd->obd_name, err);
 623                 }
 624                 if (OBP(obd, detach)) {
 625                         err = OBP(obd, detach)(obd);
 626                         if (err)
 627                                 CERROR("Detach returned %d\n", err);
 628                 }
 629                 class_release_dev(obd);
 630         }
 631 }
 632
 633 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 634 {
 635         struct obd_import *imp;
 636         struct obd_uuid uuid;
 637         int rc;
 638         ENTRY;
 639
 640         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 641             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 642                 CERROR("invalid conn_uuid\n");
 643                 RETURN(-EINVAL);
 644         }
 645         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 646             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 647             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 648                 CERROR("can't add connection on non-client dev\n");
 649                 RETURN(-EINVAL);
 650         }
 651
 652         imp = obd->u.cli.cl_import;
 653         if (!imp) {
 654                 CERROR("try to add conn on immature client dev\n");
 655                 RETURN(-EINVAL);
 656         }
 657
 658         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 659         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 660
 661         RETURN(rc);
 662 }
 663
 664 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 665 {
 666         struct obd_import *imp;
 667         struct obd_uuid uuid;
 668         int rc;
 669         ENTRY;
 670
 671         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 672             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 673                 CERROR("invalid conn_uuid\n");
 674                 RETURN(-EINVAL);
 675         }
 676         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 677             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 678                 CERROR("can't del connection on non-client dev\n");
 679                 RETURN(-EINVAL);
 680         }
 681
 682         imp = obd->u.cli.cl_import;
 683         if (!imp) {
 684                 CERROR("try to del conn on immature client dev\n");
 685                 RETURN(-EINVAL);
 686         }
 687
 688         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 689         rc = obd_del_conn(imp, &uuid);
 690
 691         RETURN(rc);
 692 }
 693
 694 CFS_LIST_HEAD(lustre_profile_list);
 695
 696 struct lustre_profile *class_get_profile(const char * prof)
 697 {
 698         struct lustre_profile *lprof;
 699
 700         ENTRY;
 701         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 702                 if (!strcmp(lprof->lp_profile, prof)) {
 703                         RETURN(lprof);
 704                 }
 705         }
 706         RETURN(NULL);
 707 }
 708
 709 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 710                       int mdclen, char *mdc)
 711 {
 712         struct lustre_profile *lprof;
 713         int err = 0;
 714         ENTRY;
 715
 716         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 717
 718         OBD_ALLOC(lprof, sizeof(*lprof));
 719         if (lprof == NULL)
 720                 RETURN(-ENOMEM);
 721         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 722
 723         LASSERT(proflen == (strlen(prof) + 1));
 724         OBD_ALLOC(lprof->lp_profile, proflen);
 725         if (lprof->lp_profile == NULL)
 726                 GOTO(out, err = -ENOMEM);
 727         memcpy(lprof->lp_profile, prof, proflen);
 728
 729         LASSERT(osclen == (strlen(osc) + 1));
 730         OBD_ALLOC(lprof->lp_dt, osclen);
 731         if (lprof->lp_dt == NULL)
 732                 GOTO(out, err = -ENOMEM);
 733         memcpy(lprof->lp_dt, osc, osclen);
 734
 735         if (mdclen > 0) {
 736                 LASSERT(mdclen == (strlen(mdc) + 1));
 737                 OBD_ALLOC(lprof->lp_md, mdclen);
 738                 if (lprof->lp_md == NULL)
 739                         GOTO(out, err = -ENOMEM);
 740                 memcpy(lprof->lp_md, mdc, mdclen);
 741         }
 742
 743         list_add(&lprof->lp_list, &lustre_profile_list);
 744         RETURN(err);
 745
 746 out:
 747         if (lprof->lp_md)
 748                 OBD_FREE(lprof->lp_md, mdclen);
 749         if (lprof->lp_dt)
 750                 OBD_FREE(lprof->lp_dt, osclen);
 751         if (lprof->lp_profile)
 752                 OBD_FREE(lprof->lp_profile, proflen);
 753         OBD_FREE(lprof, sizeof(*lprof));
 754         RETURN(err);
 755 }
 756
 757 void class_del_profile(const char *prof)
 758 {
 759         struct lustre_profile *lprof;
 760         ENTRY;
 761
 762         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 763
 764         lprof = class_get_profile(prof);
 765         if (lprof) {
 766                 list_del(&lprof->lp_list);
 767                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 768                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 769                 if (lprof->lp_md)
 770                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 771                 OBD_FREE(lprof, sizeof *lprof);
 772         }
 773         EXIT;
 774 }
 775
 776 /* COMPAT_146 */
 777 void class_del_profiles(void)
 778 {
 779         struct lustre_profile *lprof, *n;
 780         ENTRY;
 781
 782         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 783                 list_del(&lprof->lp_list);
 784                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 785                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 786                 if (lprof->lp_md)
 787                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 788                 OBD_FREE(lprof, sizeof *lprof);
 789         }
 790         EXIT;
 791 }
 792
 793 static int class_set_global(char *ptr, int val) {
 794         ENTRY;
 795
 796         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 797             at_min = val;
 798         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 799                 at_max = val;
 800         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 801                 at_extra = val;
 802         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 803                 at_early_margin = val;
 804         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 805                 at_history = val;
 806         else
 807                 RETURN(-EINVAL);
 808
 809         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 810
 811         RETURN(0);
 812 }
 813
 814
 815 /* We can't call ll_process_config directly because it lives in a module that
 816    must be loaded after this one. */
 817 static int (*client_process_config)(struct lustre_cfg *lcfg) = NULL;
 818
 819 void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg))
 820 {
 821         client_process_config = cpc;
 822 }
 823 EXPORT_SYMBOL(lustre_register_client_process_config);
 824
 825 int class_process_config(struct lustre_cfg *lcfg)
 826 {
 827         struct obd_device *obd;
 828         int err;
 829
 830         LASSERT(lcfg && !IS_ERR(lcfg));
 831         CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
 832
 833         /* Commands that don't need a device */
 834         switch(lcfg->lcfg_command) {
 835         case LCFG_ATTACH: {
 836                 err = class_attach(lcfg);
 837                 GOTO(out, err);
 838         }
 839         case LCFG_ADD_UUID: {
 840                 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
 841                        " (%s)\n", lustre_cfg_string(lcfg, 1),
 842                        lcfg->lcfg_nid, libcfs_nid2str(lcfg->lcfg_nid));
 843
 844                 err = class_add_uuid(lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid);
 845                 GOTO(out, err);
 846         }
 847         case LCFG_DEL_UUID: {
 848                 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
 849                        (lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) == 0)
 850                        ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
 851
 852                 err = class_del_uuid(lustre_cfg_string(lcfg, 1));
 853                 GOTO(out, err);
 854         }
 855         case LCFG_MOUNTOPT: {
 856                 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
 857                        lustre_cfg_string(lcfg, 1),
 858                        lustre_cfg_string(lcfg, 2),
 859                        lustre_cfg_string(lcfg, 3));
 860                 /* set these mount options somewhere, so ll_fill_super
 861                  * can find them. */
 862                 err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
 863                                         lustre_cfg_string(lcfg, 1),
 864                                         LUSTRE_CFG_BUFLEN(lcfg, 2),
 865                                         lustre_cfg_string(lcfg, 2),
 866                                         LUSTRE_CFG_BUFLEN(lcfg, 3),
 867                                         lustre_cfg_string(lcfg, 3));
 868                 GOTO(out, err);
 869         }
 870         case LCFG_DEL_MOUNTOPT: {
 871                 CDEBUG(D_IOCTL, "mountopt: profile %s\n",
 872                        lustre_cfg_string(lcfg, 1));
 873                 class_del_profile(lustre_cfg_string(lcfg, 1));
 874                 GOTO(out, err = 0);
 875         }
 876         case LCFG_SET_TIMEOUT: {
 877                 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
 878                        obd_timeout, lcfg->lcfg_num);
 879                 obd_timeout = max(lcfg->lcfg_num, 1U);
 880                 GOTO(out, err = 0);
 881         }
 882         case LCFG_SET_LDLM_TIMEOUT: {
 883                 CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
 884                        ldlm_timeout, lcfg->lcfg_num);
 885                 ldlm_timeout = max(lcfg->lcfg_num, 1U);
 886                 if (ldlm_timeout >= obd_timeout)
 887                         ldlm_timeout = max(obd_timeout / 3, 1U);
 888
 889                 GOTO(out, err = 0);
 890         }
 891         case LCFG_SET_UPCALL: {
 892                 LCONSOLE_ERROR_MSG(0x15a, "recovery upcall is deprecated\n");
 893                 /* COMPAT_146 Don't fail on old configs */
 894                 GOTO(out, err = 0);
 895         }
 896         case LCFG_MARKER: {
 897                 struct cfg_marker *marker;
 898                 marker = lustre_cfg_buf(lcfg, 1);
 899                 CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
 900                        marker->cm_flags, marker->cm_tgtname, marker->cm_comment);
 901                 GOTO(out, err = 0);
 902         }
 903         case LCFG_PARAM: {
 904                 char *tmp;
 905                 /* llite has no obd */
 906                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 907                                        PARAM_LLITE, 0) == 0) &&
 908                     client_process_config) {
 909                         err = (*client_process_config)(lcfg);
 910                         GOTO(out, err);
 911                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
 912                                               PARAM_SYS, &tmp) == 0)) {
 913                         /* Global param settings */
 914                         err = class_set_global(tmp, lcfg->lcfg_num);
 915                         /* Note that since LCFG_PARAM is LCFG_REQUIRED, new
 916                            unknown globals would cause config to fail */
 917                         if (err)
 918                                 CWARN("Ignoring unknown param %s\n", tmp);
 919                         GOTO(out, 0);
 920                 }
 921
 922                 /* Fall through */
 923                 break;
 924         }
 925         }
 926
 927         /* Commands that require a device */
 928         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 929         if (obd == NULL) {
 930                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 931                         CERROR("this lcfg command requires a device name\n");
 932                 else
 933                         CERROR("no device for: %s\n",
 934                                lustre_cfg_string(lcfg, 0));
 935
 936                 GOTO(out, err = -EINVAL);
 937         }
 938
 939         switch(lcfg->lcfg_command) {
 940         case LCFG_SETUP: {
 941                 err = class_setup(obd, lcfg);
 942                 GOTO(out, err);
 943         }
 944         case LCFG_DETACH: {
 945                 err = class_detach(obd, lcfg);
 946                 GOTO(out, err = 0);
 947         }
 948         case LCFG_CLEANUP: {
 949                 err = class_cleanup(obd, lcfg);
 950                 GOTO(out, err = 0);
 951         }
 952         case LCFG_ADD_CONN: {
 953                 err = class_add_conn(obd, lcfg);
 954                 GOTO(out, err = 0);
 955         }
 956         case LCFG_DEL_CONN: {
 957                 err = class_del_conn(obd, lcfg);
 958                 GOTO(out, err = 0);
 959         }
 960         case LCFG_POOL_NEW: {
 961                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 962                 GOTO(out, err = 0);
 963                 break;
 964         }
 965         case LCFG_POOL_ADD: {
 966                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 967                                    lustre_cfg_string(lcfg, 3));
 968                 GOTO(out, err = 0);
 969                 break;
 970         }
 971         case LCFG_POOL_REM: {
 972                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 973                                    lustre_cfg_string(lcfg, 3));
 974                 GOTO(out, err = 0);
 975                 break;
 976         }
 977         case LCFG_POOL_DEL: {
 978                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 979                 GOTO(out, err = 0);
 980                 break;
 981         }
 982         default: {
 983                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 984                 GOTO(out, err);
 985
 986         }
 987         }
 988 out:
 989         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 990                 CWARN("Ignoring error %d on optional command %#x\n", err,
 991                       lcfg->lcfg_command);
 992                 err = 0;
 993         }
 994         return err;
 995 }
 996
 997 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 998                              struct lustre_cfg *lcfg, void *data)
 999 {
1000 #ifdef __KERNEL__
1001         struct lprocfs_vars *var;
1002         char *key, *sval;
1003         int i, keylen, vallen;
1004         int matched = 0, j = 0;
1005         int rc = 0;
1006         int skip = 0;
1007         ENTRY;
1008
1009         if (lcfg->lcfg_command != LCFG_PARAM) {
1010                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
1011                 RETURN(-EINVAL);
1012         }
1013
1014         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
1015            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
1016            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
1017         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
1018                 key = lustre_cfg_buf(lcfg, i);
1019                 /* Strip off prefix */
1020                 class_match_param(key, prefix, &key);
1021                 sval = strchr(key, '=');
1022                 if (!sval || (*(sval + 1) == 0)) {
1023                         CERROR("Can't parse param %s (missing '=')\n", key);
1024                         /* rc = -EINVAL;        continue parsing other params */
1025                         continue;
1026                 }
1027                 keylen = sval - key;
1028                 sval++;
1029                 vallen = strlen(sval);
1030                 matched = 0;
1031                 j = 0;
1032                 /* Search proc entries */
1033                 while (lvars[j].name) {
1034                         var = &lvars[j];
1035                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1036                             keylen == strlen(var->name)) {
1037                                 matched++;
1038                                 rc = -EROFS;
1039                                 if (var->write_fptr) {
1040                                         mm_segment_t oldfs;
1041                                         oldfs = get_fs();
1042                                         set_fs(KERNEL_DS);
1043                                         rc = (var->write_fptr)(NULL, sval,
1044                                                                vallen, data);
1045                                         set_fs(oldfs);
1046                                 }
1047                                 break;
1048                         }
1049                         j++;
1050                 }
1051                 if (!matched) {
1052                         /* If the prefix doesn't match, return error so we
1053                            can pass it down the stack */
1054                         if (strnchr(key, keylen, '.'))
1055                             RETURN(-ENOSYS);
1056                         CERROR("%s: unknown param %s\n",
1057                                (char *)lustre_cfg_string(lcfg, 0), key);
1058                         /* rc = -EINVAL;        continue parsing other params */
1059                         skip++;
1060                 } else if (rc < 0) {
1061                         CERROR("writing proc entry %s err %d\n",
1062                                var->name, rc);
1063                         rc = 0;
1064                 } else {
1065                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1066                                       lustre_cfg_string(lcfg, 0),
1067                                       (int)strlen(prefix) - 1, prefix,
1068                                       (int)(sval - key - 1), key, sval);
1069                 }
1070         }
1071
1072         if (rc > 0)
1073                 rc = 0;
1074         if (!rc && skip)
1075                 rc = skip;
1076         RETURN(rc);
1077 #else
1078         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1079         /* Don't throw config error */
1080         RETURN(0);
1081 #endif
1082 }
1083
1084 int class_config_dump_handler(struct llog_handle * handle,
1085                               struct llog_rec_hdr *rec, void *data);
1086
1087 #ifdef __KERNEL__
1088 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1089 #else
1090 #define lustre_check_exclusion(a,b)  0
1091 #endif
1092
1093 static int class_config_llog_handler(struct llog_handle * handle,
1094                                      struct llog_rec_hdr *rec, void *data)
1095 {
1096         struct config_llog_instance *clli = data;
1097         int cfg_len = rec->lrh_len;
1098         char *cfg_buf = (char*) (rec + 1);
1099         int rc = 0;
1100         ENTRY;
1101
1102         //class_config_dump_handler(handle, rec, data);
1103
1104         switch (rec->lrh_type) {
1105         case OBD_CFG_REC: {
1106                 struct lustre_cfg *lcfg, *lcfg_new;
1107                 struct lustre_cfg_bufs bufs;
1108                 char *inst_name = NULL;
1109                 int inst_len = 0;
1110                 int inst = 0, swab = 0;
1111
1112                 lcfg = (struct lustre_cfg *)cfg_buf;
1113                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1114                         lustre_swab_lustre_cfg(lcfg);
1115                         swab = 1;
1116                 }
1117
1118                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1119                 if (rc)
1120                         GOTO(out, rc);
1121
1122                 /* Figure out config state info */
1123                 if (lcfg->lcfg_command == LCFG_MARKER) {
1124                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1125                         lustre_swab_cfg_marker(marker, swab,
1126                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1127                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1128                                clli->cfg_flags, marker->cm_flags);
1129                         if (marker->cm_flags & CM_START) {
1130                                 /* all previous flags off */
1131                                 clli->cfg_flags = CFG_F_MARKER;
1132                                 if (marker->cm_flags & CM_SKIP) {
1133                                         clli->cfg_flags |= CFG_F_SKIP;
1134                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1135                                                marker->cm_step);
1136                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1137                                            (clli->cfg_sb &&
1138                                             lustre_check_exclusion(clli->cfg_sb,
1139                                                          marker->cm_tgtname))) {
1140                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1141                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1142                                                marker->cm_step);
1143                                 }
1144                         } else if (marker->cm_flags & CM_END) {
1145                                 clli->cfg_flags = 0;
1146                         }
1147                 }
1148                 /* A config command without a start marker before it is
1149                    illegal (post 146) */
1150                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1151                     !(clli->cfg_flags & CFG_F_MARKER) &&
1152                     (lcfg->lcfg_command != LCFG_MARKER)) {
1153                         CWARN("Config not inside markers, ignoring! "
1154                               "(inst: %s, uuid: %s, flags: %#x)\n",
1155                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1156                               clli->cfg_uuid.uuid, clli->cfg_flags);
1157                         clli->cfg_flags |= CFG_F_SKIP;
1158                 }
1159                 if (clli->cfg_flags & CFG_F_SKIP) {
1160                         CDEBUG(D_CONFIG, "skipping %#x\n",
1161                                clli->cfg_flags);
1162                         rc = 0;
1163                         /* No processing! */
1164                         break;
1165                 }
1166
1167                 /*
1168                  * For interoperability between 1.8 and 2.0,
1169                  * rename "mds" obd device type to "mdt".
1170                  */
1171                 {
1172                         char *typename = lustre_cfg_string(lcfg, 1);
1173                         char *index = lustre_cfg_string(lcfg, 2);
1174
1175                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1176                              strcmp(typename, "mds") == 0)) {
1177                                 CWARN("For 1.8 interoperability, rename obd "
1178                                        "type from mds to mdt\n");
1179                                 typename[2] = 't';
1180                         }
1181                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1182                              strcmp(index, "type") == 0)) {
1183                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1184                                        "set this index to '0'\n");
1185                                 index[0] = '0';
1186                                 index[1] = 0;
1187                         }
1188                 }
1189
1190                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1191                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1192                         /* Add inactive instead */
1193                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1194
1195                 lustre_cfg_bufs_init(&bufs, lcfg);
1196
1197                 if (clli && clli->cfg_instance &&
1198                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1199                         inst = 1;
1200                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1201                                 strlen(clli->cfg_instance) + 1;
1202                         OBD_ALLOC(inst_name, inst_len);
1203                         if (inst_name == NULL)
1204                                 GOTO(out, rc = -ENOMEM);
1205                         sprintf(inst_name, "%s-%s",
1206                                 lustre_cfg_string(lcfg, 0),
1207                                 clli->cfg_instance);
1208                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1209                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1210                                lcfg->lcfg_command, inst_name);
1211                 }
1212
1213                 /* we override the llog's uuid for clients, to insure they
1214                 are unique */
1215                 if (clli && clli->cfg_instance &&
1216                     lcfg->lcfg_command == LCFG_ATTACH) {
1217                         lustre_cfg_bufs_set_string(&bufs, 2,
1218                                                    clli->cfg_uuid.uuid);
1219                 }
1220                 /*
1221                  * sptlrpc config record, we expect 2 data segments:
1222                  *  [0]: fs_name/target_name,
1223                  *  [1]: rule string
1224                  * moving them to index [1] and [2], and insert MGC's
1225                  * obdname at index [0].
1226                  */
1227                 if (clli && clli->cfg_instance == NULL &&
1228                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1229                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1230                                             bufs.lcfg_buflen[1]);
1231                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1232                                             bufs.lcfg_buflen[0]);
1233                         lustre_cfg_bufs_set_string(&bufs, 0,
1234                                                    clli->cfg_obdname);
1235                 }
1236
1237                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1238
1239                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1240                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1241
1242                 /* XXX Hack to try to remain binary compatible with
1243                  * pre-newconfig logs */
1244                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1245                     (lcfg->lcfg_nid >> 32) == 0) {
1246                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1247
1248                         lcfg_new->lcfg_nid =
1249                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1250                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1251                               lcfg->lcfg_nal, addr,
1252                               libcfs_nid2str(lcfg_new->lcfg_nid));
1253                 } else {
1254                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1255                 }
1256
1257                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1258
1259                 rc = class_process_config(lcfg_new);
1260                 lustre_cfg_free(lcfg_new);
1261
1262                 if (inst)
1263                         OBD_FREE(inst_name, inst_len);
1264                 break;
1265         }
1266         default:
1267                 CERROR("Unknown llog record type %#x encountered\n",
1268                        rec->lrh_type);
1269                 break;
1270         }
1271 out:
1272         if (rc) {
1273                 CERROR("Err %d on cfg command:\n", rc);
1274                 class_config_dump_handler(handle, rec, data);
1275         }
1276         RETURN(rc);
1277 }
1278
1279 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1280                             struct config_llog_instance *cfg)
1281 {
1282         struct llog_process_cat_data cd = {0, 0};
1283         struct llog_handle *llh;
1284         int rc, rc2;
1285         ENTRY;
1286
1287         CDEBUG(D_INFO, "looking up llog %s\n", name);
1288         rc = llog_create(ctxt, &llh, NULL, name);
1289         if (rc)
1290                 RETURN(rc);
1291
1292         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1293         if (rc)
1294                 GOTO(parse_out, rc);
1295
1296         /* continue processing from where we last stopped to end-of-log */
1297         if (cfg)
1298                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1299         cd.lpcd_last_idx = 0;
1300
1301         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1302
1303         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1304                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1305
1306         if (cfg)
1307                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1308
1309 parse_out:
1310         rc2 = llog_close(llh);
1311         if (rc == 0)
1312                 rc = rc2;
1313
1314         RETURN(rc);
1315 }
1316
1317 int class_config_dump_handler(struct llog_handle * handle,
1318                               struct llog_rec_hdr *rec, void *data)
1319 {
1320         int cfg_len = rec->lrh_len;
1321         char *cfg_buf = (char*) (rec + 1);
1322         char *outstr, *ptr, *end;
1323         int rc = 0;
1324         ENTRY;
1325
1326         OBD_ALLOC(outstr, 256);
1327         end = outstr + 256;
1328         ptr = outstr;
1329         if (!outstr) {
1330                 RETURN(-ENOMEM);
1331         }
1332         if (rec->lrh_type == OBD_CFG_REC) {
1333                 struct lustre_cfg *lcfg;
1334                 int i;
1335
1336                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1337                 if (rc)
1338                         GOTO(out, rc);
1339                 lcfg = (struct lustre_cfg *)cfg_buf;
1340
1341                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1342                                 lcfg->lcfg_command);
1343                 if (lcfg->lcfg_flags) {
1344                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1345                                         lcfg->lcfg_flags);
1346                 }
1347                 if (lcfg->lcfg_num) {
1348                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1349                                         lcfg->lcfg_num);
1350                 }
1351                 if (lcfg->lcfg_nid) {
1352                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1353                                         libcfs_nid2str(lcfg->lcfg_nid),
1354                                         lcfg->lcfg_nid);
1355                 }
1356                 if (lcfg->lcfg_command == LCFG_MARKER) {
1357                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1358                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1359                                         marker->cm_step, marker->cm_flags,
1360                                         marker->cm_tgtname, marker->cm_comment);
1361                 } else {
1362                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1363                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1364                                                 lustre_cfg_string(lcfg, i));
1365                         }
1366                 }
1367                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1368         } else {
1369                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1370                 rc = -EINVAL;
1371         }
1372 out:
1373         OBD_FREE(outstr, 256);
1374         RETURN(rc);
1375 }
1376
1377 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1378                            struct config_llog_instance *cfg)
1379 {
1380         struct llog_handle *llh;
1381         int rc, rc2;
1382         ENTRY;
1383
1384         LCONSOLE_INFO("Dumping config log %s\n", name);
1385
1386         rc = llog_create(ctxt, &llh, NULL, name);
1387         if (rc)
1388                 RETURN(rc);
1389
1390         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1391         if (rc)
1392                 GOTO(parse_out, rc);
1393
1394         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1395 parse_out:
1396         rc2 = llog_close(llh);
1397         if (rc == 0)
1398                 rc = rc2;
1399
1400         LCONSOLE_INFO("End config log %s\n", name);
1401         RETURN(rc);
1402
1403 }
1404
1405 /* Cleanup and detach */
1406 int class_manual_cleanup(struct obd_device *obd)
1407 {
1408         char                    flags[3] = "";
1409         struct lustre_cfg      *lcfg;
1410         struct lustre_cfg_bufs  bufs;
1411         int                     rc;
1412         ENTRY;
1413
1414         if (!obd) {
1415                 CERROR("empty cleanup\n");
1416                 RETURN(-EALREADY);
1417         }
1418
1419         if (obd->obd_force)
1420                 strcat(flags, "F");
1421         if (obd->obd_fail)
1422                 strcat(flags, "A");
1423
1424         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1425                obd->obd_name, flags);
1426
1427         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1428         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1429         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1430         if (!lcfg)
1431                 RETURN(-ENOMEM);
1432
1433         rc = class_process_config(lcfg);
1434         if (rc) {
1435                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1436                 GOTO(out, rc);
1437         }
1438
1439         /* the lcfg is almost the same for both ops */
1440         lcfg->lcfg_command = LCFG_DETACH;
1441         rc = class_process_config(lcfg);
1442         if (rc)
1443                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1444 out:
1445         lustre_cfg_free(lcfg);
1446         RETURN(rc);
1447 }
1448
1449 /*
1450  * uuid<->export lustre hash operations
1451  */
1452
1453 static unsigned
1454 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1455 {
1456         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1457                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1458 }
1459
1460 static void *
1461 uuid_key(struct hlist_node *hnode)
1462 {
1463         struct obd_export *exp;
1464
1465         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1466
1467         RETURN(&exp->exp_client_uuid);
1468 }
1469
1470 /*
1471  * NOTE: It is impossible to find an export that is in failed
1472  *       state with this function
1473  */
1474 static int
1475 uuid_compare(void *key, struct hlist_node *hnode)
1476 {
1477         struct obd_export *exp;
1478
1479         LASSERT(key);
1480         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1481
1482         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1483                !exp->exp_failed);
1484 }
1485
1486 static void *
1487 uuid_export_get(struct hlist_node *hnode)
1488 {
1489         struct obd_export *exp;
1490
1491         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1492         class_export_get(exp);
1493
1494         RETURN(exp);
1495 }
1496
1497 static void *
1498 uuid_export_put(struct hlist_node *hnode)
1499 {
1500         struct obd_export *exp;
1501
1502         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1503         class_export_put(exp);
1504
1505         RETURN(exp);
1506 }
1507
1508 static lustre_hash_ops_t uuid_hash_ops = {
1509         .lh_hash    = uuid_hash,
1510         .lh_key     = uuid_key,
1511         .lh_compare = uuid_compare,
1512         .lh_get     = uuid_export_get,
1513         .lh_put     = uuid_export_put,
1514 };
1515
1516
1517 /*
1518  * nid<->export hash operations
1519  */
1520
1521 static unsigned
1522 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1523 {
1524         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1525 }
1526
1527 static void *
1528 nid_key(struct hlist_node *hnode)
1529 {
1530         struct obd_export *exp;
1531
1532         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1533
1534         RETURN(&exp->exp_connection->c_peer.nid);
1535 }
1536
1537 /*
1538  * NOTE: It is impossible to find an export that is in failed
1539  *       state with this function
1540  */
1541 static int
1542 nid_compare(void *key, struct hlist_node *hnode)
1543 {
1544         struct obd_export *exp;
1545
1546         LASSERT(key);
1547         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1548
1549         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1550                !exp->exp_failed);
1551 }
1552
1553 static void *
1554 nid_export_get(struct hlist_node *hnode)
1555 {
1556         struct obd_export *exp;
1557
1558         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1559         class_export_get(exp);
1560
1561         RETURN(exp);
1562 }
1563
1564 static void *
1565 nid_export_put(struct hlist_node *hnode)
1566 {
1567         struct obd_export *exp;
1568
1569         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1570         class_export_put(exp);
1571
1572         RETURN(exp);
1573 }
1574
1575 static lustre_hash_ops_t nid_hash_ops = {
1576         .lh_hash    = nid_hash,
1577         .lh_key     = nid_key,
1578         .lh_compare = nid_compare,
1579         .lh_get     = nid_export_get,
1580         .lh_put     = nid_export_put,
1581 };
1582
1583
1584 /*
1585  * nid<->nidstats hash operations
1586  */
1587
1588 static void *
1589 nidstats_key(struct hlist_node *hnode)
1590 {
1591         struct nid_stat *ns;
1592
1593         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1594
1595         RETURN(&ns->nid);
1596 }
1597
1598 static int
1599 nidstats_compare(void *key, struct hlist_node *hnode)
1600 {
1601         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1602 }
1603
1604 static void *
1605 nidstats_get(struct hlist_node *hnode)
1606 {
1607         struct nid_stat *ns;
1608
1609         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1610         nidstat_getref(ns);
1611
1612         RETURN(ns);
1613 }
1614
1615 static void *
1616 nidstats_put(struct hlist_node *hnode)
1617 {
1618         struct nid_stat *ns;
1619
1620         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1621         nidstat_putref(ns);
1622
1623         RETURN(ns);
1624 }
1625
1626 static lustre_hash_ops_t nid_stat_hash_ops = {
1627         .lh_hash    = nid_hash,
1628         .lh_key     = nidstats_key,
1629         .lh_compare = nidstats_compare,
1630         .lh_get     = nidstats_get,
1631         .lh_put     = nidstats_put,
1632 };