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_unlinked_exports);
 259         CFS_INIT_LIST_HEAD(&obd->obd_delayed_exports);
 260         CFS_INIT_LIST_HEAD(&obd->obd_exports_timed);
 261         CFS_INIT_LIST_HEAD(&obd->obd_nid_stats);
 262         spin_lock_init(&obd->obd_nid_lock);
 263         spin_lock_init(&obd->obd_dev_lock);
 264         sema_init(&obd->obd_dev_sem, 1);
 265         spin_lock_init(&obd->obd_osfs_lock);
 266         /* obd->obd_osfs_age must be set to a value in the distant
 267          * past to guarantee a fresh statfs is fetched on mount. */
 268         obd->obd_osfs_age = cfs_time_shift_64(-1000);
 269
 270         /* XXX belongs in setup not attach  */
 271         /* recovery data */
 272         cfs_init_timer(&obd->obd_recovery_timer);
 273         spin_lock_init(&obd->obd_processing_task_lock);
 274         cfs_waitq_init(&obd->obd_next_transno_waitq);
 275         cfs_waitq_init(&obd->obd_evict_inprogress_waitq);
 276         CFS_INIT_LIST_HEAD(&obd->obd_req_replay_queue);
 277         CFS_INIT_LIST_HEAD(&obd->obd_lock_replay_queue);
 278         CFS_INIT_LIST_HEAD(&obd->obd_final_req_queue);
 279
 280         llog_group_init(&obd->obd_olg, FILTER_GROUP_LLOG);
 281
 282         len = strlen(uuid);
 283         if (len >= sizeof(obd->obd_uuid)) {
 284                 CERROR("uuid must be < %d bytes long\n",
 285                        (int)sizeof(obd->obd_uuid));
 286                 GOTO(out, rc = -EINVAL);
 287         }
 288         memcpy(obd->obd_uuid.uuid, uuid, len);
 289
 290         /* do the attach */
 291         if (OBP(obd, attach)) {
 292                 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
 293                 if (rc)
 294                         GOTO(out, rc = -EINVAL);
 295         }
 296
 297         /* Detach drops this */
 298         spin_lock(&obd->obd_dev_lock);
 299         atomic_set(&obd->obd_refcount, 1);
 300         spin_unlock(&obd->obd_dev_lock);
 301         lu_ref_init(&obd->obd_reference);
 302         lu_ref_add(&obd->obd_reference, "attach", obd);
 303
 304         obd->obd_attached = 1;
 305         CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
 306                obd->obd_minor, typename, atomic_read(&obd->obd_refcount));
 307         RETURN(0);
 308  out:
 309         if (obd != NULL) {
 310                 class_release_dev(obd);
 311         }
 312         return rc;
 313 }
 314
 315 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
 316 {
 317         int err = 0;
 318         struct obd_export *exp;
 319         ENTRY;
 320
 321         LASSERT(obd != NULL);
 322         LASSERTF(obd == class_num2obd(obd->obd_minor),
 323                  "obd %p != obd_devs[%d] %p\n",
 324                  obd, obd->obd_minor, class_num2obd(obd->obd_minor));
 325         LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
 326                  "obd %p obd_magic %08x != %08x\n",
 327                  obd, obd->obd_magic, OBD_DEVICE_MAGIC);
 328
 329         /* have we attached a type to this device? */
 330         if (!obd->obd_attached) {
 331                 CERROR("Device %d not attached\n", obd->obd_minor);
 332                 RETURN(-ENODEV);
 333         }
 334
 335         if (obd->obd_set_up) {
 336                 CERROR("Device %d already setup (type %s)\n",
 337                        obd->obd_minor, obd->obd_type->typ_name);
 338                 RETURN(-EEXIST);
 339         }
 340
 341         /* is someone else setting us up right now? (attach inits spinlock) */
 342         spin_lock(&obd->obd_dev_lock);
 343         if (obd->obd_starting) {
 344                 spin_unlock(&obd->obd_dev_lock);
 345                 CERROR("Device %d setup in progress (type %s)\n",
 346                        obd->obd_minor, obd->obd_type->typ_name);
 347                 RETURN(-EEXIST);
 348         }
 349         /* just leave this on forever.  I can't use obd_set_up here because
 350            other fns check that status, and we're not actually set up yet. */
 351         obd->obd_starting = 1;
 352         obd->obd_uuid_hash = NULL;
 353         obd->obd_nid_hash = NULL;
 354         obd->obd_nid_stats_hash = NULL;
 355         spin_unlock(&obd->obd_dev_lock);
 356
 357         /* create an uuid-export lustre hash */
 358         obd->obd_uuid_hash = lustre_hash_init("UUID_HASH",
 359                                               HASH_UUID_CUR_BITS,
 360                                               HASH_UUID_MAX_BITS,
 361                                               &uuid_hash_ops, 0);
 362         if (!obd->obd_uuid_hash)
 363                 GOTO(err_hash, err = -ENOMEM);
 364
 365         /* create a nid-export lustre hash */
 366         obd->obd_nid_hash = lustre_hash_init("NID_HASH",
 367                                              HASH_NID_CUR_BITS,
 368                                              HASH_NID_MAX_BITS,
 369                                              &nid_hash_ops, 0);
 370         if (!obd->obd_nid_hash)
 371                 GOTO(err_hash, err = -ENOMEM);
 372
 373         /* create a nid-stats lustre hash */
 374         obd->obd_nid_stats_hash = lustre_hash_init("NID_STATS",
 375                                                    HASH_NID_STATS_CUR_BITS,
 376                                                    HASH_NID_STATS_MAX_BITS,
 377                                                    &nid_stat_hash_ops, 0);
 378         if (!obd->obd_nid_stats_hash)
 379                 GOTO(err_hash, err = -ENOMEM);
 380
 381         exp = class_new_export(obd, &obd->obd_uuid);
 382         if (IS_ERR(exp))
 383                 GOTO(err_hash, err = PTR_ERR(exp));
 384
 385         obd->obd_self_export = exp;
 386         list_del_init(&exp->exp_obd_chain_timed);
 387         class_export_put(exp);
 388
 389         err = obd_setup(obd, lcfg);
 390         if (err)
 391                 GOTO(err_exp, err);
 392
 393         obd->obd_set_up = 1;
 394
 395         spin_lock(&obd->obd_dev_lock);
 396         /* cleanup drops this */
 397         class_incref(obd, "setup", obd);
 398         spin_unlock(&obd->obd_dev_lock);
 399
 400         CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
 401                obd->obd_name, obd->obd_uuid.uuid);
 402
 403         RETURN(0);
 404 err_exp:
 405         if (obd->obd_self_export) {
 406                 class_unlink_export(obd->obd_self_export);
 407                 obd->obd_self_export = NULL;
 408         }
 409 err_hash:
 410         if (obd->obd_uuid_hash) {
 411                 lustre_hash_exit(obd->obd_uuid_hash);
 412                 obd->obd_uuid_hash = NULL;
 413         }
 414         if (obd->obd_nid_hash) {
 415                 lustre_hash_exit(obd->obd_nid_hash);
 416                 obd->obd_nid_hash = NULL;
 417         }
 418         if (obd->obd_nid_stats_hash) {
 419                 lustre_hash_exit(obd->obd_nid_stats_hash);
 420                 obd->obd_nid_stats_hash = NULL;
 421         }
 422         obd->obd_starting = 0;
 423         CERROR("setup %s failed (%d)\n", obd->obd_name, err);
 424         return err;
 425 }
 426
 427 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
 428 {
 429         ENTRY;
 430
 431         if (obd->obd_set_up) {
 432                 CERROR("OBD device %d still set up\n", obd->obd_minor);
 433                 RETURN(-EBUSY);
 434         }
 435
 436         spin_lock(&obd->obd_dev_lock);
 437         if (!obd->obd_attached) {
 438                 spin_unlock(&obd->obd_dev_lock);
 439                 CERROR("OBD device %d not attached\n", obd->obd_minor);
 440                 RETURN(-ENODEV);
 441         }
 442         obd->obd_attached = 0;
 443         spin_unlock(&obd->obd_dev_lock);
 444
 445         CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
 446                obd->obd_name, obd->obd_uuid.uuid);
 447
 448         class_decref(obd, "attach", obd);
 449
 450         /* not strictly necessary, but cleans up eagerly */
 451         obd_zombie_impexp_cull();
 452
 453         RETURN(0);
 454 }
 455
 456 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
 457 {
 458         int err = 0;
 459         char *flag;
 460         ENTRY;
 461
 462         OBD_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
 463
 464         if (!obd->obd_set_up) {
 465                 CERROR("Device %d not setup\n", obd->obd_minor);
 466                 RETURN(-ENODEV);
 467         }
 468
 469         spin_lock(&obd->obd_dev_lock);
 470         if (obd->obd_stopping) {
 471                 spin_unlock(&obd->obd_dev_lock);
 472                 CERROR("OBD %d already stopping\n", obd->obd_minor);
 473                 RETURN(-ENODEV);
 474         }
 475         /* Leave this on forever */
 476         obd->obd_stopping = 1;
 477         spin_unlock(&obd->obd_dev_lock);
 478
 479         if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
 480                 for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
 481                         switch (*flag) {
 482                         case 'F':
 483                                 obd->obd_force = 1;
 484                                 break;
 485                         case 'A':
 486                                 LCONSOLE_WARN("Failing over %s\n",
 487                                               obd->obd_name);
 488                                 obd->obd_fail = 1;
 489                                 obd->obd_no_transno = 1;
 490                                 obd->obd_no_recov = 1;
 491                                 if (OBP(obd, iocontrol)) {
 492                                         obd_iocontrol(OBD_IOC_SYNC,
 493                                                       obd->obd_self_export,
 494                                                       0, NULL, NULL);
 495                                         /* Set the obd readonly if we can */
 496                                         obd_iocontrol(OBD_IOC_SET_READONLY,
 497                                                       obd->obd_self_export,
 498                                                       0, NULL, NULL);
 499                                 }
 500                                 break;
 501                         default:
 502                                 CERROR("Unrecognised flag '%c'\n", *flag);
 503                         }
 504         }
 505
 506         LASSERT(obd->obd_self_export);
 507
 508         /* The three references that should be remaining are the
 509          * obd_self_export and the attach and setup references. */
 510         if (atomic_read(&obd->obd_refcount) > 3) {
 511                 /* refcounf - 3 might be the number of real exports
 512                    (excluding self export). But class_incref is called
 513                    by other things as well, so don't count on it. */
 514                 CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d\n",
 515                        obd->obd_name, atomic_read(&obd->obd_refcount) - 3);
 516                 dump_exports(obd);
 517                 class_disconnect_exports(obd);
 518         }
 519
 520         /* destroy an uuid-export hash body */
 521         if (obd->obd_uuid_hash) {
 522                 lustre_hash_exit(obd->obd_uuid_hash);
 523                 obd->obd_uuid_hash = NULL;
 524         }
 525
 526         /* destroy a nid-export hash body */
 527         if (obd->obd_nid_hash) {
 528                 lustre_hash_exit(obd->obd_nid_hash);
 529                 obd->obd_nid_hash = NULL;
 530         }
 531
 532         /* destroy a nid-stats hash body */
 533         if (obd->obd_nid_stats_hash) {
 534                 lustre_hash_exit(obd->obd_nid_stats_hash);
 535                 obd->obd_nid_stats_hash = NULL;
 536         }
 537
 538         /* Precleanup, we must make sure all exports get destroyed. */
 539         err = obd_precleanup(obd, OBD_CLEANUP_EXPORTS);
 540         if (err)
 541                 CERROR("Precleanup %s returned %d\n",
 542                        obd->obd_name, err);
 543         class_decref(obd, "setup", obd);
 544         obd->obd_set_up = 0;
 545         RETURN(0);
 546 }
 547
 548 struct obd_device *class_incref(struct obd_device *obd,
 549                                 const char *scope, const void *source)
 550 {
 551         lu_ref_add_atomic(&obd->obd_reference, scope, source);
 552         atomic_inc(&obd->obd_refcount);
 553         CDEBUG(D_INFO, "incref %s (%p) now %d\n", obd->obd_name, obd,
 554                atomic_read(&obd->obd_refcount));
 555
 556         return obd;
 557 }
 558
 559 void class_decref(struct obd_device *obd, const char *scope, const void *source)
 560 {
 561         int err;
 562         int refs;
 563
 564         spin_lock(&obd->obd_dev_lock);
 565         atomic_dec(&obd->obd_refcount);
 566         refs = atomic_read(&obd->obd_refcount);
 567         spin_unlock(&obd->obd_dev_lock);
 568         lu_ref_del(&obd->obd_reference, scope, source);
 569
 570         CDEBUG(D_INFO, "Decref %s (%p) now %d\n", obd->obd_name, obd, refs);
 571
 572         if ((refs == 1) && obd->obd_stopping) {
 573                 /* All exports have been destroyed; there should
 574                    be no more in-progress ops by this point.*/
 575
 576                 spin_lock(&obd->obd_self_export->exp_lock);
 577                 obd->obd_self_export->exp_flags |= exp_flags_from_obd(obd);
 578                 spin_unlock(&obd->obd_self_export->exp_lock);
 579
 580                 /* note that we'll recurse into class_decref again */
 581                 class_unlink_export(obd->obd_self_export);
 582                 return;
 583         }
 584
 585         if (refs == 0) {
 586                 CDEBUG(D_CONFIG, "finishing cleanup of obd %s (%s)\n",
 587                        obd->obd_name, obd->obd_uuid.uuid);
 588                 LASSERT(!obd->obd_attached);
 589                 if (obd->obd_stopping) {
 590                         /* If we're not stopping, we were never set up */
 591                         err = obd_cleanup(obd);
 592                         if (err)
 593                                 CERROR("Cleanup %s returned %d\n",
 594                                        obd->obd_name, err);
 595                 }
 596                 if (OBP(obd, detach)) {
 597                         err = OBP(obd, detach)(obd);
 598                         if (err)
 599                                 CERROR("Detach returned %d\n", err);
 600                 }
 601                 class_release_dev(obd);
 602         }
 603 }
 604
 605 int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 606 {
 607         struct obd_import *imp;
 608         struct obd_uuid uuid;
 609         int rc;
 610         ENTRY;
 611
 612         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 613             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 614                 CERROR("invalid conn_uuid\n");
 615                 RETURN(-EINVAL);
 616         }
 617         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 618             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
 619             strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
 620                 CERROR("can't add connection on non-client dev\n");
 621                 RETURN(-EINVAL);
 622         }
 623
 624         imp = obd->u.cli.cl_import;
 625         if (!imp) {
 626                 CERROR("try to add conn on immature client dev\n");
 627                 RETURN(-EINVAL);
 628         }
 629
 630         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 631         rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
 632
 633         RETURN(rc);
 634 }
 635
 636 int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
 637 {
 638         struct obd_import *imp;
 639         struct obd_uuid uuid;
 640         int rc;
 641         ENTRY;
 642
 643         if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
 644             LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
 645                 CERROR("invalid conn_uuid\n");
 646                 RETURN(-EINVAL);
 647         }
 648         if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
 649             strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
 650                 CERROR("can't del connection on non-client dev\n");
 651                 RETURN(-EINVAL);
 652         }
 653
 654         imp = obd->u.cli.cl_import;
 655         if (!imp) {
 656                 CERROR("try to del conn on immature client dev\n");
 657                 RETURN(-EINVAL);
 658         }
 659
 660         obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
 661         rc = obd_del_conn(imp, &uuid);
 662
 663         RETURN(rc);
 664 }
 665
 666 CFS_LIST_HEAD(lustre_profile_list);
 667
 668 struct lustre_profile *class_get_profile(const char * prof)
 669 {
 670         struct lustre_profile *lprof;
 671
 672         ENTRY;
 673         list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
 674                 if (!strcmp(lprof->lp_profile, prof)) {
 675                         RETURN(lprof);
 676                 }
 677         }
 678         RETURN(NULL);
 679 }
 680
 681 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
 682                       int mdclen, char *mdc)
 683 {
 684         struct lustre_profile *lprof;
 685         int err = 0;
 686         ENTRY;
 687
 688         CDEBUG(D_CONFIG, "Add profile %s\n", prof);
 689
 690         OBD_ALLOC(lprof, sizeof(*lprof));
 691         if (lprof == NULL)
 692                 RETURN(-ENOMEM);
 693         CFS_INIT_LIST_HEAD(&lprof->lp_list);
 694
 695         LASSERT(proflen == (strlen(prof) + 1));
 696         OBD_ALLOC(lprof->lp_profile, proflen);
 697         if (lprof->lp_profile == NULL)
 698                 GOTO(out, err = -ENOMEM);
 699         memcpy(lprof->lp_profile, prof, proflen);
 700
 701         LASSERT(osclen == (strlen(osc) + 1));
 702         OBD_ALLOC(lprof->lp_dt, osclen);
 703         if (lprof->lp_dt == NULL)
 704                 GOTO(out, err = -ENOMEM);
 705         memcpy(lprof->lp_dt, osc, osclen);
 706
 707         if (mdclen > 0) {
 708                 LASSERT(mdclen == (strlen(mdc) + 1));
 709                 OBD_ALLOC(lprof->lp_md, mdclen);
 710                 if (lprof->lp_md == NULL)
 711                         GOTO(out, err = -ENOMEM);
 712                 memcpy(lprof->lp_md, mdc, mdclen);
 713         }
 714
 715         list_add(&lprof->lp_list, &lustre_profile_list);
 716         RETURN(err);
 717
 718 out:
 719         if (lprof->lp_md)
 720                 OBD_FREE(lprof->lp_md, mdclen);
 721         if (lprof->lp_dt)
 722                 OBD_FREE(lprof->lp_dt, osclen);
 723         if (lprof->lp_profile)
 724                 OBD_FREE(lprof->lp_profile, proflen);
 725         OBD_FREE(lprof, sizeof(*lprof));
 726         RETURN(err);
 727 }
 728
 729 void class_del_profile(const char *prof)
 730 {
 731         struct lustre_profile *lprof;
 732         ENTRY;
 733
 734         CDEBUG(D_CONFIG, "Del profile %s\n", prof);
 735
 736         lprof = class_get_profile(prof);
 737         if (lprof) {
 738                 list_del(&lprof->lp_list);
 739                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 740                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 741                 if (lprof->lp_md)
 742                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 743                 OBD_FREE(lprof, sizeof *lprof);
 744         }
 745         EXIT;
 746 }
 747
 748 /* COMPAT_146 */
 749 void class_del_profiles(void)
 750 {
 751         struct lustre_profile *lprof, *n;
 752         ENTRY;
 753
 754         list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
 755                 list_del(&lprof->lp_list);
 756                 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
 757                 OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
 758                 if (lprof->lp_md)
 759                         OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
 760                 OBD_FREE(lprof, sizeof *lprof);
 761         }
 762         EXIT;
 763 }
 764
 765 static int class_set_global(char *ptr, int val) {
 766         ENTRY;
 767
 768         if (class_match_param(ptr, PARAM_AT_MIN, NULL) == 0)
 769             at_min = val;
 770         else if (class_match_param(ptr, PARAM_AT_MAX, NULL) == 0)
 771                 at_max = val;
 772         else if (class_match_param(ptr, PARAM_AT_EXTRA, NULL) == 0)
 773                 at_extra = val;
 774         else if (class_match_param(ptr, PARAM_AT_EARLY_MARGIN, NULL) == 0)
 775                 at_early_margin = val;
 776         else if (class_match_param(ptr, PARAM_AT_HISTORY, NULL) == 0)
 777                 at_history = val;
 778         else
 779                 RETURN(-EINVAL);
 780
 781         CDEBUG(D_IOCTL, "global %s = %d\n", ptr, val);
 782
 783         RETURN(0);
 784 }
 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                 char *tmp;
 877                 /* llite has no obd */
 878                 if ((class_match_param(lustre_cfg_string(lcfg, 1),
 879                                        PARAM_LLITE, 0) == 0) &&
 880                     client_process_config) {
 881                         err = (*client_process_config)(lcfg);
 882                         GOTO(out, err);
 883                 } else if ((class_match_param(lustre_cfg_string(lcfg, 1),
 884                                               PARAM_SYS, &tmp) == 0)) {
 885                         /* Global param settings */
 886                         err = class_set_global(tmp, lcfg->lcfg_num);
 887                         /* Note that since LCFG_PARAM is LCFG_REQUIRED, new
 888                            unknown globals would cause config to fail */
 889                         if (err)
 890                                 CWARN("Ignoring unknown param %s\n", tmp);
 891                         GOTO(out, 0);
 892                 }
 893
 894                 /* Fall through */
 895                 break;
 896         }
 897         }
 898
 899         /* Commands that require a device */
 900         obd = class_name2obd(lustre_cfg_string(lcfg, 0));
 901         if (obd == NULL) {
 902                 if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
 903                         CERROR("this lcfg command requires a device name\n");
 904                 else
 905                         CERROR("no device for: %s\n",
 906                                lustre_cfg_string(lcfg, 0));
 907
 908                 GOTO(out, err = -EINVAL);
 909         }
 910
 911         switch(lcfg->lcfg_command) {
 912         case LCFG_SETUP: {
 913                 err = class_setup(obd, lcfg);
 914                 GOTO(out, err);
 915         }
 916         case LCFG_DETACH: {
 917                 err = class_detach(obd, lcfg);
 918                 GOTO(out, err = 0);
 919         }
 920         case LCFG_CLEANUP: {
 921                 err = class_cleanup(obd, lcfg);
 922                 GOTO(out, err = 0);
 923         }
 924         case LCFG_ADD_CONN: {
 925                 err = class_add_conn(obd, lcfg);
 926                 GOTO(out, err = 0);
 927         }
 928         case LCFG_DEL_CONN: {
 929                 err = class_del_conn(obd, lcfg);
 930                 GOTO(out, err = 0);
 931         }
 932         case LCFG_POOL_NEW: {
 933                 err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
 934                 GOTO(out, err = 0);
 935                 break;
 936         }
 937         case LCFG_POOL_ADD: {
 938                 err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
 939                                    lustre_cfg_string(lcfg, 3));
 940                 GOTO(out, err = 0);
 941                 break;
 942         }
 943         case LCFG_POOL_REM: {
 944                 err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
 945                                    lustre_cfg_string(lcfg, 3));
 946                 GOTO(out, err = 0);
 947                 break;
 948         }
 949         case LCFG_POOL_DEL: {
 950                 err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
 951                 GOTO(out, err = 0);
 952                 break;
 953         }
 954         default: {
 955                 err = obd_process_config(obd, sizeof(*lcfg), lcfg);
 956                 GOTO(out, err);
 957
 958         }
 959         }
 960 out:
 961         if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
 962                 CWARN("Ignoring error %d on optional command %#x\n", err,
 963                       lcfg->lcfg_command);
 964                 err = 0;
 965         }
 966         return err;
 967 }
 968
 969 int class_process_proc_param(char *prefix, struct lprocfs_vars *lvars,
 970                              struct lustre_cfg *lcfg, void *data)
 971 {
 972 #ifdef __KERNEL__
 973         struct lprocfs_vars *var;
 974         char *key, *sval;
 975         int i, keylen, vallen;
 976         int matched = 0, j = 0;
 977         int rc = 0;
 978         int skip = 0;
 979         ENTRY;
 980
 981         if (lcfg->lcfg_command != LCFG_PARAM) {
 982                 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
 983                 RETURN(-EINVAL);
 984         }
 985
 986         /* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
 987            or   lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
 988            or   lctl conf_param lustre-OST0000.osc.max_dirty_mb=36 */
 989         for (i = 1; i < lcfg->lcfg_bufcount; i++) {
 990                 key = lustre_cfg_buf(lcfg, i);
 991                 /* Strip off prefix */
 992                 class_match_param(key, prefix, &key);
 993                 sval = strchr(key, '=');
 994                 if (!sval || (*(sval + 1) == 0)) {
 995                         CERROR("Can't parse param %s (missing '=')\n", key);
 996                         /* rc = -EINVAL;        continue parsing other params */
 997                         continue;
 998                 }
 999                 keylen = sval - key;
1000                 sval++;
1001                 vallen = strlen(sval);
1002                 matched = 0;
1003                 j = 0;
1004                 /* Search proc entries */
1005                 while (lvars[j].name) {
1006                         var = &lvars[j];
1007                         if (class_match_param(key, (char *)var->name, 0) == 0 &&
1008                             keylen == strlen(var->name)) {
1009                                 matched++;
1010                                 rc = -EROFS;
1011                                 if (var->write_fptr) {
1012                                         mm_segment_t oldfs;
1013                                         oldfs = get_fs();
1014                                         set_fs(KERNEL_DS);
1015                                         rc = (var->write_fptr)(NULL, sval,
1016                                                                vallen, data);
1017                                         set_fs(oldfs);
1018                                 }
1019                                 break;
1020                         }
1021                         j++;
1022                 }
1023                 if (!matched) {
1024                         /* If the prefix doesn't match, return error so we
1025                            can pass it down the stack */
1026                         if (strnchr(key, keylen, '.'))
1027                             RETURN(-ENOSYS);
1028                         CERROR("%s: unknown param %s\n",
1029                                (char *)lustre_cfg_string(lcfg, 0), key);
1030                         /* rc = -EINVAL;        continue parsing other params */
1031                         skip++;
1032                 } else if (rc < 0) {
1033                         CERROR("writing proc entry %s err %d\n",
1034                                var->name, rc);
1035                         rc = 0;
1036                 } else {
1037                         LCONSOLE_INFO("%s.%.*s: set parameter %.*s=%s\n",
1038                                       lustre_cfg_string(lcfg, 0),
1039                                       (int)strlen(prefix) - 1, prefix,
1040                                       (int)(sval - key - 1), key, sval);
1041                 }
1042         }
1043
1044         if (rc > 0)
1045                 rc = 0;
1046         if (!rc && skip)
1047                 rc = skip;
1048         RETURN(rc);
1049 #else
1050         CDEBUG(D_CONFIG, "liblustre can't process params.\n");
1051         /* Don't throw config error */
1052         RETURN(0);
1053 #endif
1054 }
1055
1056 int class_config_dump_handler(struct llog_handle * handle,
1057                               struct llog_rec_hdr *rec, void *data);
1058
1059 #ifdef __KERNEL__
1060 extern int lustre_check_exclusion(struct super_block *sb, char *svname);
1061 #else
1062 #define lustre_check_exclusion(a,b)  0
1063 #endif
1064
1065 static int class_config_llog_handler(struct llog_handle * handle,
1066                                      struct llog_rec_hdr *rec, void *data)
1067 {
1068         struct config_llog_instance *clli = data;
1069         int cfg_len = rec->lrh_len;
1070         char *cfg_buf = (char*) (rec + 1);
1071         int rc = 0;
1072         ENTRY;
1073
1074         //class_config_dump_handler(handle, rec, data);
1075
1076         switch (rec->lrh_type) {
1077         case OBD_CFG_REC: {
1078                 struct lustre_cfg *lcfg, *lcfg_new;
1079                 struct lustre_cfg_bufs bufs;
1080                 char *inst_name = NULL;
1081                 int inst_len = 0;
1082                 int inst = 0, swab = 0;
1083
1084                 lcfg = (struct lustre_cfg *)cfg_buf;
1085                 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
1086                         lustre_swab_lustre_cfg(lcfg);
1087                         swab = 1;
1088                 }
1089
1090                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1091                 if (rc)
1092                         GOTO(out, rc);
1093
1094                 /* Figure out config state info */
1095                 if (lcfg->lcfg_command == LCFG_MARKER) {
1096                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1097                         lustre_swab_cfg_marker(marker, swab,
1098                                                LUSTRE_CFG_BUFLEN(lcfg, 1));
1099                         CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
1100                                clli->cfg_flags, marker->cm_flags);
1101                         if (marker->cm_flags & CM_START) {
1102                                 /* all previous flags off */
1103                                 clli->cfg_flags = CFG_F_MARKER;
1104                                 if (marker->cm_flags & CM_SKIP) {
1105                                         clli->cfg_flags |= CFG_F_SKIP;
1106                                         CDEBUG(D_CONFIG, "SKIP #%d\n",
1107                                                marker->cm_step);
1108                                 } else if ((marker->cm_flags & CM_EXCLUDE) ||
1109                                            (clli->cfg_sb &&
1110                                             lustre_check_exclusion(clli->cfg_sb,
1111                                                          marker->cm_tgtname))) {
1112                                         clli->cfg_flags |= CFG_F_EXCLUDE;
1113                                         CDEBUG(D_CONFIG, "EXCLUDE %d\n",
1114                                                marker->cm_step);
1115                                 }
1116                         } else if (marker->cm_flags & CM_END) {
1117                                 clli->cfg_flags = 0;
1118                         }
1119                 }
1120                 /* A config command without a start marker before it is
1121                    illegal (post 146) */
1122                 if (!(clli->cfg_flags & CFG_F_COMPAT146) &&
1123                     !(clli->cfg_flags & CFG_F_MARKER) &&
1124                     (lcfg->lcfg_command != LCFG_MARKER)) {
1125                         CWARN("Config not inside markers, ignoring! "
1126                               "(inst: %s, uuid: %s, flags: %#x)\n",
1127                               clli->cfg_instance ? clli->cfg_instance : "<null>",
1128                               clli->cfg_uuid.uuid, clli->cfg_flags);
1129                         clli->cfg_flags |= CFG_F_SKIP;
1130                 }
1131                 if (clli->cfg_flags & CFG_F_SKIP) {
1132                         CDEBUG(D_CONFIG, "skipping %#x\n",
1133                                clli->cfg_flags);
1134                         rc = 0;
1135                         /* No processing! */
1136                         break;
1137                 }
1138
1139                 /*
1140                  * For interoperability between 1.8 and 2.0,
1141                  * rename "mds" obd device type to "mdt".
1142                  */
1143                 {
1144                         char *typename = lustre_cfg_string(lcfg, 1);
1145                         char *index = lustre_cfg_string(lcfg, 2);
1146
1147                         if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
1148                              strcmp(typename, "mds") == 0)) {
1149                                 CWARN("For 1.8 interoperability, rename obd "
1150                                        "type from mds to mdt\n");
1151                                 typename[2] = 't';
1152                         }
1153                         if ((lcfg->lcfg_command == LCFG_SETUP && index &&
1154                              strcmp(index, "type") == 0)) {
1155                                 CDEBUG(D_INFO, "For 1.8 interoperability, "
1156                                        "set this index to '0'\n");
1157                                 index[0] = '0';
1158                                 index[1] = 0;
1159                         }
1160                 }
1161
1162                 if ((clli->cfg_flags & CFG_F_EXCLUDE) &&
1163                     (lcfg->lcfg_command == LCFG_LOV_ADD_OBD))
1164                         /* Add inactive instead */
1165                         lcfg->lcfg_command = LCFG_LOV_ADD_INA;
1166
1167                 lustre_cfg_bufs_init(&bufs, lcfg);
1168
1169                 if (clli && clli->cfg_instance &&
1170                     LUSTRE_CFG_BUFLEN(lcfg, 0) > 0){
1171                         inst = 1;
1172                         inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
1173                                 strlen(clli->cfg_instance) + 1;
1174                         OBD_ALLOC(inst_name, inst_len);
1175                         if (inst_name == NULL)
1176                                 GOTO(out, rc = -ENOMEM);
1177                         sprintf(inst_name, "%s-%s",
1178                                 lustre_cfg_string(lcfg, 0),
1179                                 clli->cfg_instance);
1180                         lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
1181                         CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
1182                                lcfg->lcfg_command, inst_name);
1183                 }
1184
1185                 /* we override the llog's uuid for clients, to insure they
1186                 are unique */
1187                 if (clli && clli->cfg_instance &&
1188                     lcfg->lcfg_command == LCFG_ATTACH) {
1189                         lustre_cfg_bufs_set_string(&bufs, 2,
1190                                                    clli->cfg_uuid.uuid);
1191                 }
1192                 /*
1193                  * sptlrpc config record, we expect 2 data segments:
1194                  *  [0]: fs_name/target_name,
1195                  *  [1]: rule string
1196                  * moving them to index [1] and [2], and insert MGC's
1197                  * obdname at index [0].
1198                  */
1199                 if (clli && clli->cfg_instance == NULL &&
1200                     lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
1201                         lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
1202                                             bufs.lcfg_buflen[1]);
1203                         lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
1204                                             bufs.lcfg_buflen[0]);
1205                         lustre_cfg_bufs_set_string(&bufs, 0,
1206                                                    clli->cfg_obdname);
1207                 }
1208
1209                 lcfg_new = lustre_cfg_new(lcfg->lcfg_command, &bufs);
1210
1211                 lcfg_new->lcfg_num   = lcfg->lcfg_num;
1212                 lcfg_new->lcfg_flags = lcfg->lcfg_flags;
1213
1214                 /* XXX Hack to try to remain binary compatible with
1215                  * pre-newconfig logs */
1216                 if (lcfg->lcfg_nal != 0 &&      /* pre-newconfig log? */
1217                     (lcfg->lcfg_nid >> 32) == 0) {
1218                         __u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
1219
1220                         lcfg_new->lcfg_nid =
1221                                 LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
1222                         CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
1223                               lcfg->lcfg_nal, addr,
1224                               libcfs_nid2str(lcfg_new->lcfg_nid));
1225                 } else {
1226                         lcfg_new->lcfg_nid = lcfg->lcfg_nid;
1227                 }
1228
1229                 lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
1230
1231                 rc = class_process_config(lcfg_new);
1232                 lustre_cfg_free(lcfg_new);
1233
1234                 if (inst)
1235                         OBD_FREE(inst_name, inst_len);
1236                 break;
1237         }
1238         default:
1239                 CERROR("Unknown llog record type %#x encountered\n",
1240                        rec->lrh_type);
1241                 break;
1242         }
1243 out:
1244         if (rc) {
1245                 CERROR("Err %d on cfg command:\n", rc);
1246                 class_config_dump_handler(handle, rec, data);
1247         }
1248         RETURN(rc);
1249 }
1250
1251 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
1252                             struct config_llog_instance *cfg)
1253 {
1254         struct llog_process_cat_data cd = {0, 0};
1255         struct llog_handle *llh;
1256         int rc, rc2;
1257         ENTRY;
1258
1259         CDEBUG(D_INFO, "looking up llog %s\n", name);
1260         rc = llog_create(ctxt, &llh, NULL, name);
1261         if (rc)
1262                 RETURN(rc);
1263
1264         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1265         if (rc)
1266                 GOTO(parse_out, rc);
1267
1268         /* continue processing from where we last stopped to end-of-log */
1269         if (cfg)
1270                 cd.lpcd_first_idx = cfg->cfg_last_idx;
1271         cd.lpcd_last_idx = 0;
1272
1273         rc = llog_process(llh, class_config_llog_handler, cfg, &cd);
1274
1275         CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
1276                cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
1277
1278         if (cfg)
1279                 cfg->cfg_last_idx = cd.lpcd_last_idx;
1280
1281 parse_out:
1282         rc2 = llog_close(llh);
1283         if (rc == 0)
1284                 rc = rc2;
1285
1286         RETURN(rc);
1287 }
1288
1289 int class_config_dump_handler(struct llog_handle * handle,
1290                               struct llog_rec_hdr *rec, void *data)
1291 {
1292         int cfg_len = rec->lrh_len;
1293         char *cfg_buf = (char*) (rec + 1);
1294         char *outstr, *ptr, *end;
1295         int rc = 0;
1296         ENTRY;
1297
1298         OBD_ALLOC(outstr, 256);
1299         end = outstr + 256;
1300         ptr = outstr;
1301         if (!outstr) {
1302                 RETURN(-ENOMEM);
1303         }
1304         if (rec->lrh_type == OBD_CFG_REC) {
1305                 struct lustre_cfg *lcfg;
1306                 int i;
1307
1308                 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
1309                 if (rc)
1310                         GOTO(out, rc);
1311                 lcfg = (struct lustre_cfg *)cfg_buf;
1312
1313                 ptr += snprintf(ptr, end-ptr, "cmd=%05x ",
1314                                 lcfg->lcfg_command);
1315                 if (lcfg->lcfg_flags) {
1316                         ptr += snprintf(ptr, end-ptr, "flags=%#08x ",
1317                                         lcfg->lcfg_flags);
1318                 }
1319                 if (lcfg->lcfg_num) {
1320                         ptr += snprintf(ptr, end-ptr, "num=%#08x ",
1321                                         lcfg->lcfg_num);
1322                 }
1323                 if (lcfg->lcfg_nid) {
1324                         ptr += snprintf(ptr, end-ptr, "nid=%s("LPX64")\n     ",
1325                                         libcfs_nid2str(lcfg->lcfg_nid),
1326                                         lcfg->lcfg_nid);
1327                 }
1328                 if (lcfg->lcfg_command == LCFG_MARKER) {
1329                         struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
1330                         ptr += snprintf(ptr, end-ptr, "marker=%d(%#x)%s '%s'",
1331                                         marker->cm_step, marker->cm_flags,
1332                                         marker->cm_tgtname, marker->cm_comment);
1333                 } else {
1334                         for (i = 0; i <  lcfg->lcfg_bufcount; i++) {
1335                                 ptr += snprintf(ptr, end-ptr, "%d:%s  ", i,
1336                                                 lustre_cfg_string(lcfg, i));
1337                         }
1338                 }
1339                 LCONSOLE(D_WARNING, "   %s\n", outstr);
1340         } else {
1341                 LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
1342                 rc = -EINVAL;
1343         }
1344 out:
1345         OBD_FREE(outstr, 256);
1346         RETURN(rc);
1347 }
1348
1349 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
1350                            struct config_llog_instance *cfg)
1351 {
1352         struct llog_handle *llh;
1353         int rc, rc2;
1354         ENTRY;
1355
1356         LCONSOLE_INFO("Dumping config log %s\n", name);
1357
1358         rc = llog_create(ctxt, &llh, NULL, name);
1359         if (rc)
1360                 RETURN(rc);
1361
1362         rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
1363         if (rc)
1364                 GOTO(parse_out, rc);
1365
1366         rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
1367 parse_out:
1368         rc2 = llog_close(llh);
1369         if (rc == 0)
1370                 rc = rc2;
1371
1372         LCONSOLE_INFO("End config log %s\n", name);
1373         RETURN(rc);
1374
1375 }
1376
1377 /* Cleanup and detach */
1378 int class_manual_cleanup(struct obd_device *obd)
1379 {
1380         char                    flags[3] = "";
1381         struct lustre_cfg      *lcfg;
1382         struct lustre_cfg_bufs  bufs;
1383         int                     rc;
1384         ENTRY;
1385
1386         if (!obd) {
1387                 CERROR("empty cleanup\n");
1388                 RETURN(-EALREADY);
1389         }
1390
1391         if (obd->obd_force)
1392                 strcat(flags, "F");
1393         if (obd->obd_fail)
1394                 strcat(flags, "A");
1395
1396         CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
1397                obd->obd_name, flags);
1398
1399         lustre_cfg_bufs_reset(&bufs, obd->obd_name);
1400         lustre_cfg_bufs_set_string(&bufs, 1, flags);
1401         lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
1402         if (!lcfg)
1403                 RETURN(-ENOMEM);
1404
1405         rc = class_process_config(lcfg);
1406         if (rc) {
1407                 CERROR("cleanup failed %d: %s\n", rc, obd->obd_name);
1408                 GOTO(out, rc);
1409         }
1410
1411         /* the lcfg is almost the same for both ops */
1412         lcfg->lcfg_command = LCFG_DETACH;
1413         rc = class_process_config(lcfg);
1414         if (rc)
1415                 CERROR("detach failed %d: %s\n", rc, obd->obd_name);
1416 out:
1417         lustre_cfg_free(lcfg);
1418         RETURN(rc);
1419 }
1420
1421 /*
1422  * uuid<->export lustre hash operations
1423  */
1424
1425 static unsigned
1426 uuid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1427 {
1428         return lh_djb2_hash(((struct obd_uuid *)key)->uuid,
1429                             sizeof(((struct obd_uuid *)key)->uuid), mask);
1430 }
1431
1432 static void *
1433 uuid_key(struct hlist_node *hnode)
1434 {
1435         struct obd_export *exp;
1436
1437         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1438
1439         RETURN(&exp->exp_client_uuid);
1440 }
1441
1442 /*
1443  * NOTE: It is impossible to find an export that is in failed
1444  *       state with this function
1445  */
1446 static int
1447 uuid_compare(void *key, struct hlist_node *hnode)
1448 {
1449         struct obd_export *exp;
1450
1451         LASSERT(key);
1452         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1453
1454         RETURN(obd_uuid_equals((struct obd_uuid *)key,&exp->exp_client_uuid) &&
1455                !exp->exp_failed);
1456 }
1457
1458 static void *
1459 uuid_export_get(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_get(exp);
1465
1466         RETURN(exp);
1467 }
1468
1469 static void *
1470 uuid_export_put(struct hlist_node *hnode)
1471 {
1472         struct obd_export *exp;
1473
1474         exp = hlist_entry(hnode, struct obd_export, exp_uuid_hash);
1475         class_export_put(exp);
1476
1477         RETURN(exp);
1478 }
1479
1480 static lustre_hash_ops_t uuid_hash_ops = {
1481         .lh_hash    = uuid_hash,
1482         .lh_key     = uuid_key,
1483         .lh_compare = uuid_compare,
1484         .lh_get     = uuid_export_get,
1485         .lh_put     = uuid_export_put,
1486 };
1487
1488
1489 /*
1490  * nid<->export hash operations
1491  */
1492
1493 static unsigned
1494 nid_hash(lustre_hash_t *lh,  void *key, unsigned mask)
1495 {
1496         return lh_djb2_hash(key, sizeof(lnet_nid_t), mask);
1497 }
1498
1499 static void *
1500 nid_key(struct hlist_node *hnode)
1501 {
1502         struct obd_export *exp;
1503
1504         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1505
1506         RETURN(&exp->exp_connection->c_peer.nid);
1507 }
1508
1509 /*
1510  * NOTE: It is impossible to find an export that is in failed
1511  *       state with this function
1512  */
1513 static int
1514 nid_compare(void *key, struct hlist_node *hnode)
1515 {
1516         struct obd_export *exp;
1517
1518         LASSERT(key);
1519         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1520
1521         RETURN(exp->exp_connection->c_peer.nid == *(lnet_nid_t *)key &&
1522                !exp->exp_failed);
1523 }
1524
1525 static void *
1526 nid_export_get(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_get(exp);
1532
1533         RETURN(exp);
1534 }
1535
1536 static void *
1537 nid_export_put(struct hlist_node *hnode)
1538 {
1539         struct obd_export *exp;
1540
1541         exp = hlist_entry(hnode, struct obd_export, exp_nid_hash);
1542         class_export_put(exp);
1543
1544         RETURN(exp);
1545 }
1546
1547 static lustre_hash_ops_t nid_hash_ops = {
1548         .lh_hash    = nid_hash,
1549         .lh_key     = nid_key,
1550         .lh_compare = nid_compare,
1551         .lh_get     = nid_export_get,
1552         .lh_put     = nid_export_put,
1553 };
1554
1555
1556 /*
1557  * nid<->nidstats hash operations
1558  */
1559
1560 static void *
1561 nidstats_key(struct hlist_node *hnode)
1562 {
1563         struct nid_stat *ns;
1564
1565         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1566
1567         RETURN(&ns->nid);
1568 }
1569
1570 static int
1571 nidstats_compare(void *key, struct hlist_node *hnode)
1572 {
1573         RETURN(*(lnet_nid_t *)nidstats_key(hnode) == *(lnet_nid_t *)key);
1574 }
1575
1576 static void *
1577 nidstats_get(struct hlist_node *hnode)
1578 {
1579         struct nid_stat *ns;
1580
1581         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1582         nidstat_getref(ns);
1583
1584         RETURN(ns);
1585 }
1586
1587 static void *
1588 nidstats_put(struct hlist_node *hnode)
1589 {
1590         struct nid_stat *ns;
1591
1592         ns = hlist_entry(hnode, struct nid_stat, nid_hash);
1593         nidstat_putref(ns);
1594
1595         RETURN(ns);
1596 }
1597
1598 static lustre_hash_ops_t nid_stat_hash_ops = {
1599         .lh_hash    = nid_hash,
1600         .lh_key     = nidstats_key,
1601         .lh_compare = nidstats_compare,
1602         .lh_get     = nidstats_get,
1603         .lh_put     = nidstats_put,
1604 };